
| ANNUAL REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 | |||||
| TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 | |||||
| (Commission File Number) | ||
| Xcel Energy Inc. | ||||||||
| (Exact name of registrant as specified in its charter) | ||||||||
| (State or Other Jurisdiction of Incorporation or Organization) | (IRS Employer Identification No.) | |||||||||||||
| (Address of Principal Executive Offices) | (Zip Code) | |||||||||||||
| (Registrant’s Telephone Number, Including Area Code) | |||||
| Title of each class | Trading Symbol(s) | Name of each exchange on which registered | ||||||||||||
| PART I | ||||||||
| Item 1 — | ||||||||
| Item 1A — | ||||||||
| Item 1B — | ||||||||
| Item 2 — | ||||||||
| Item 3 — | ||||||||
| Item 4 — | ||||||||
| PART II | ||||||||
| Item 5 — | ||||||||
| Item 6 — | ||||||||
| Item 7 — | ||||||||
| Item 7A — | ||||||||
| Item 8 — | ||||||||
| Item 9 — | ||||||||
| Item 9A — | ||||||||
| Item 9B — | ||||||||
| Item 9C — | ||||||||
| PART III | ||||||||
| Item 10 — | ||||||||
| Item 11 — | ||||||||
| Item 12 — | ||||||||
| Item 13 — | ||||||||
| Item 14 — | ||||||||
| PART IV | ||||||||
| Item 15 — | ||||||||
| Item 16 — | ||||||||
ITEM 1 — BUSINESS | ||
| Xcel Energy Inc.’s Subsidiaries and Affiliates (current and former) | |||||
| Capital Services | Capital Services, LLC | ||||
| Eloigne | Eloigne Company | ||||
| e prime | e prime inc. | ||||
| NSP-Minnesota | Northern States Power Company, a Minnesota corporation | ||||
| NSP System | The electric production and transmission system of NSP-Minnesota and NSP-Wisconsin operated on an integrated basis and managed by NSP-Minnesota | ||||
| NSP-Wisconsin | Northern States Power Company, a Wisconsin corporation | ||||
| Operating companies | NSP-Minnesota, NSP-Wisconsin, PSCo and SPS | ||||
| PSCo | Public Service Company of Colorado | ||||
| SPS | Southwestern Public Service Co. | ||||
| Utility subsidiaries | NSP-Minnesota, NSP-Wisconsin, PSCo and SPS | ||||
| WGI | WestGas InterState, Inc. | ||||
| WYCO | WYCO Development, LLC | ||||
| Xcel Energy | Xcel Energy Inc. and its subsidiaries | ||||
| Federal and State Regulatory Agencies | |||||
| CPUC | Colorado Public Utilities Commission | ||||
| DOC | Minnesota Department of Commerce | ||||
| DOE | United States Department of Energy | ||||
| DOT | United States Department of Transportation | ||||
| EPA | United States Environmental Protection Agency | ||||
| FERC | Federal Energy Regulatory Commission | ||||
| IRS | Internal Revenue Service | ||||
| MPCA | Minnesota Pollution Control Agency | ||||
| MPUC | Minnesota Public Utilities Commission | ||||
| NDPSC | North Dakota Public Service Commission | ||||
| NERC | North American Electric Reliability Corporation | ||||
| NMPRC | New Mexico Public Regulation Commission | ||||
| NRC | Nuclear Regulatory Commission | ||||
| PHMSA | Pipeline and Hazardous Materials Safety Administration | ||||
| PSCW | Public Service Commission of Wisconsin | ||||
| PUCT | Public Utility Commission of Texas | ||||
| SDPUC | South Dakota Public Utility Commission | ||||
| SEC | Securities and Exchange Commission | ||||
| TCEQ | Texas Commission on Environmental Quality | ||||
| Electric, Purchased Gas and Resource Adjustment Clauses | |||||
| CIP | Conservation improvement program | ||||
| DSM | Demand side management | ||||
| ECA | Retail electric commodity adjustment | ||||
| FCA | Fuel clause adjustment | ||||
| GCA | Gas cost adjustment | ||||
| GUIC | Gas utility infrastructure cost rider | ||||
| RES | Renewable energy standard | ||||
| Other | |||||
| AFUDC | Allowance for funds used during construction | ||||
| AMT | Alternative minimum tax | ||||
| ALJ | Administrative Law Judge | ||||
| ARO | Asset retirement obligation | ||||
| ASC | Financial Accounting Standards Board Accounting Standards Codification | ||||
| ATM | At-the-market | ||||
| BART | Best available retrofit technology | ||||
| C&I | Commercial and Industrial | ||||
| CapX2020 | Alliance of electric cooperatives, municipals and investor-owned utilities in the upper Midwest involved in a joint transmission line planning and construction effort | ||||
| CCR | Coal combustion residuals | ||||
| CCR Rule | Final rule (40 CFR 257.50 - 257.107) published by the EPA regulating the management, storage and disposal of CCRs as a nonhazardous waste | ||||
| CDD | Cooling degree-days | ||||
| CEO | Chief executive officer | ||||
| CFO | Chief financial officer | ||||
| CIG | Colorado Interstate Gas Company, LLC | ||||
| CON | Certificate of Need | ||||
| CSPV | Crystalline Silicon Photovoltaic | ||||
| CWIP | Construction work in progress | ||||
| D.C. Circuit | United States Court of Appeals for the District of Columbia Circuit | ||||
| DECON | Decommissioning method where radioactive contamination is removed and safely disposed of at a requisite facility or decontaminated to a permitted level | ||||
| DRIP | Dividend Reinvestment Program | ||||
| EEI | Edison Electric Institute | ||||
| EIP | Energy Impact Partners | ||||
| EMANI | European Mutual Association for Nuclear Insurance | ||||
| EPS | Earnings per share | ||||
| ETR | Effective tax rate | ||||
| FTR | Financial transmission right | ||||
| GAAP | Generally accepted accounting principles | ||||
| GE | General Electric | ||||
| GHG | Greenhouse gas | ||||
| HDD | Heating degree-days | ||||
| INPO | Institute of Nuclear Power Operations | ||||
| IPP | Independent power producing entity | ||||
| IRA | Inflation Reduction Act | ||||
| ISO | Independent System Operator | ||||
| ITC | Investment Tax Credit | ||||
| LP&L | Lubbock Power & Light | ||||
| MEC | Mankato Energy Center | ||||
| MGP | Manufactured gas plant | ||||
| MISO | Midcontinent Independent System Operator, Inc. | ||||
| Native load | Demand of retail and wholesale customers that a utility has an obligation to serve under statute or contract | ||||
| NAV | Net asset value | ||||
| NEIL | Nuclear Electric Insurance Ltd. | ||||
| NOL | Net operating loss | ||||
| NOPR | Notice of proposed rulemaking | ||||
| NOx | Nitrogen Oxides | ||||
| O&M | Operating and maintenance | ||||
| OATT | Open Access Transmission Tariff | ||||
| PFAS | Per- and PolyFluoroAlkyl Substances | ||||
| PI | Prairie Island nuclear generating plant | ||||
| Post-65 | Post-Medicare | ||||
| PPA | Purchased power agreement | ||||
| Pre-65 | Pre-Medicare | ||||
| PTC | Production tax credit | ||||
| REC | Renewable energy credit | ||||
| RFP | Request for proposal | ||||
| ROE | Return on equity | ||||
| ROU | Right-of-use | ||||
| RTO | Regional Transmission Organization | ||||
| S&P | Standard & Poor’s Global Ratings | ||||
| SERP | Supplemental executive retirement plan | ||||
SO2 | Sulfur dioxide | ||||
| SPP | Southwest Power Pool, Inc. | ||||
| TCA | Transmission cost adjustment | ||||
| TCJA | 2017 federal tax reform enacted as Public Law No: 115-97, commonly referred to as the Tax Cuts and Jobs Act | ||||
| THI | Temperature-humidity index | ||||
| TO | Transmission owner | ||||
| TSR | Total shareholder return | ||||
| VaR | Value at Risk | ||||
| VIE | Variable interest entity | ||||
| WACC | Weighted Average Cost of Capital | ||||
| Measurements | |||||
| Bcf | Billion cubic feet | ||||
| KV | Kilovolts | ||||
| KWh | Kilowatt hours | ||||
| MMBtu | Million British thermal units | ||||
| MW | Megawatts | ||||
| MWh | Megawatt hours | ||||
Where to Find More Information | ||
Forward-Looking Statements | ||
Overview | ||
| Subsidiary / Affiliate | Function | |||||||
| NSP-Minnesota | Electric & Gas | |||||||
| NSP-Wisconsin | Electric & Gas | |||||||
| PSCo | Electric & Gas | |||||||
| SPS | Electric | |||||||
| WGI | Interstate gas pipeline | |||||||
| WYCO | Gas storage and transportation | |||||||
| Other Subsidiaries | See Note 1 to the consolidated financial statements for further information | |||||||
| Utility Subsidiary Overview | ||||||||
| Electric customers | 3.8 million | |||||||
| Natural gas customers | 2.1 million | |||||||
| Total assets | $61.1 billion | |||||||
| Electric generating capacity | 20,897 MW | |||||||
| Natural gas storage capacity | 53.5 Bcf | |||||||
| Electric transmission lines (conductor miles) | 110,000 miles | |||||||
| Electric distribution lines (conductor miles) | 213,000 miles | |||||||
| Natural gas transmission lines | 2,200 miles | |||||||
| Natural gas distribution lines | 37,000 miles | |||||||
| Service Territory | |||||||||||

Strategy | ||
| LEAD THE CLEAN ENERGY TRANSITION | ENHANCE THE CUSTOMER EXPERIENCE | KEEP BILLS LOW | ||||||





| Female | Ethnically Diverse | |||||||
| Board of Directors | 33 | % | 17 | % | ||||
| CEO direct reports | 33 | 22 | ||||||
| Management | 25 | 12 | ||||||
| Employees | 24 | 18 | ||||||
| New hires | 35 | 24 | ||||||
| Interns (hired throughout 2022) | 32 | 25 | ||||||
| Employee Turnover | Retirement Eligibility | |||||||||||||
| Bargaining | 7 | % | Within next 5 years | 24 | % | |||||||||
| Non-Bargaining | 15 | Within next 10 years | 35 | |||||||||||
Overall (a) | 11 | |||||||||||||
![]() | ![]() | ![]() | ![]() | ||||||||
| Fortune | Human Rights Campaign | Ethisphere | GI Jobs | ||||||||
| World’s Most Admired Companies | Best Places to Work for LGBTQ Equality | World’s Most Ethical Companies | Military Friendly Employer | ||||||||
NSP-Minnesota | |||||||||||||||||
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| Electric customers | 1.5 million | NSP-Minnesota conducts business in Minnesota, North Dakota and South Dakota and has electric operations in all three states including the generation, purchase, transmission, distribution and sale of electricity. NSP-Minnesota and NSP-Wisconsin electric operations are managed on the NSP System. NSP-Minnesota also purchases, transports, distributes and sells natural gas to retail customers and transports customer-owned natural gas in Minnesota and North Dakota. | |||||||||||||||
| Natural gas customers | 0.5 million | ||||||||||||||||
| Total assets | $23.7 billion | ||||||||||||||||
| Rate Base (estimated) | $15.1 billion | ||||||||||||||||
| ROE (net income / average stockholder's equity) | 8.76% | ||||||||||||||||
| Electric generating capacity | 8,949 MW | ||||||||||||||||
| Gas storage capacity | 17.1 Bcf | ||||||||||||||||
| Electric transmission lines (conductor miles) | 33,000 miles | ||||||||||||||||
| Electric distribution lines (conductor miles) | 82,000 miles | ||||||||||||||||
| Natural gas transmission lines | 78 miles | ||||||||||||||||
| Natural gas distribution lines | 11,000 miles | ||||||||||||||||
NSP-Wisconsin | |||||||||||||||||
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| Electric customers | 0.3 million | NSP-Wisconsin conducts business in Wisconsin and Michigan and generates, transmits, distributes and sells electricity. NSP-Minnesota and NSP-Wisconsin electric operations are managed on the NSP System. NSP-Wisconsin also purchases, transports, distributes and sells natural gas to retail customers and transports customer-owned natural gas. | |||||||||||||||
| Natural gas customers | 0.1 million | ||||||||||||||||
| Total assets | $3.4 billion | ||||||||||||||||
| Rate Base (estimated) | $2.1 billion | ||||||||||||||||
| ROE (net income / average stockholder's equity) | 10.57% | ||||||||||||||||
| Electric generating capacity | 548 MW | ||||||||||||||||
| Gas storage capacity | 4.3 Bcf | ||||||||||||||||
| Electric transmission lines (conductor miles) | 12,000 miles | ||||||||||||||||
| Electric distribution lines (conductor miles) | 28,000 miles | ||||||||||||||||
| Natural gas transmission lines | 3 miles | ||||||||||||||||
| Natural gas distribution lines | 3,000 miles | ||||||||||||||||
PSCo | |||||||||||||||||
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| Electric customers | 1.6 million | PSCo conducts business in Colorado and generates, purchases, transmits, distributes and sells electricity. PSCo also purchases, transports, distributes and sells natural gas to retail customers and transports customer-owned natural gas. | |||||||||||||||
| Natural gas customers | 1.5 million | ||||||||||||||||
| Total assets | $23.6 billion | ||||||||||||||||
| Rate Base (estimated) | $14.9 billion | ||||||||||||||||
| ROE (net income / average stockholder's equity) | 8.23% | ||||||||||||||||
| Electric generating capacity | 6,151 MW | ||||||||||||||||
| Gas storage capacity | 32.1 Bcf | ||||||||||||||||
| Electric transmission lines (conductor miles) | 25,000 miles | ||||||||||||||||
| Electric distribution lines (conductor miles) | 79,000 miles | ||||||||||||||||
| Natural gas transmission lines | 2,000 miles | ||||||||||||||||
| Natural gas distribution lines | 24,000 miles | ||||||||||||||||
| SPS | |||||||||||||||||
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SPS conducts business in Texas and New Mexico and generates, purchases, transmits, distributes and sells electricity. | |||||||||||||||||
| Electric customers | 0.4 million | ||||||||||||||||
| Total assets | $9.7 billion | ||||||||||||||||
| Rate Base (estimated) | $6.7 billion | ||||||||||||||||
| ROE (net income / average stockholder's equity) | 9.36% | ||||||||||||||||
| Electric generating capacity | 5,249 MW | ||||||||||||||||
| Electric transmission lines (conductor miles) | 41,000 miles | ||||||||||||||||
| Electric distribution lines (conductor miles) | 24,000 miles | ||||||||||||||||
Operations Overview | ||
Electric Operations | ||
| Electric Operations (percentage of total) | Sales Volume | Number of Customers | Revenues | |||||||||||||||||
| Residential | 23 | % | 86 | % | 29 | % | ||||||||||||||
| C&I | 55 | 12 | 48 | |||||||||||||||||
| Other | 22 | 2 | 23 | |||||||||||||||||
| 2022 | 2021 | |||||||||||||
| KWh sales per retail customer | 24,285 | 23,968 | ||||||||||||
| Revenue per retail customer | $ | 2,513 | $ | 2,405 | ||||||||||
| Residential revenue per KWh | 13.41 | ¢ | 12.94 | ¢ | ||||||||||
| C&I revenue per KWh | 9.02 | ¢ | 8.73 | ¢ | ||||||||||
| Total retail revenue per KWh | 10.35 | ¢ | 10.03 | ¢ | ||||||||||


| Utility Subsidiary | 2022 | 2021 | ||||||||||||||||||||||||
| Wind Farms | Capacity (MW) (a) | Wind Farms | Capacity (MW) (b) | |||||||||||||||||||||||
| NSP System | 16 | 2,352 | 14 | 2,031 | ||||||||||||||||||||||
| PSCo | 2 | 1,059 | 2 | 1,059 | ||||||||||||||||||||||
| SPS | 2 | 984 | 2 | 984 | ||||||||||||||||||||||
| Total | 20 | 4,395 | 18 | 4,074 | ||||||||||||||||||||||
| Utility Subsidiary | 2022 | 2021 | ||||||||||||||||||||||||
| PPAs | Range (MW) | PPAs | Range (MW) | |||||||||||||||||||||||
| NSP System | 129 | 1 — 206 | 128 | 1 — 206 | ||||||||||||||||||||||
| PSCo | 17 | 23 — 301 | 17 | 23 — 301 | ||||||||||||||||||||||
| SPS | 17 | 1 — 250 | 17 | 1 — 250 | ||||||||||||||||||||||
| Utility Subsidiary | 2022 | 2021 | ||||||||||||
| NSP System | 4,515 | 3,997 | ||||||||||||
| PSCo | 4,082 | 4,085 | ||||||||||||
| SPS | 2,548 | 2,548 | ||||||||||||
| Utility Subsidiary | 2022 | 2021 | ||||||||||||
| NSP System | $ | 18 | $ | 25 | ||||||||||
| PSCo | 11 | 17 | ||||||||||||
| SPS | 13 | 17 | ||||||||||||
| Utility Subsidiary | 2022 | 2021 | ||||||||||||
| NSP System | $ | 37 | $ | 37 | ||||||||||
| PSCo | 38 | 35 | ||||||||||||
| SPS | 27 | 27 | ||||||||||||
| Project | Utility Subsidiary | Capacity (MW) | |||||||||||||||
| Dakota Range | NSP-Minnesota | 298 | (a)(b) | ||||||||||||||
| Nobles Repower | NSP-Minnesota | 200 | (a)(b) | ||||||||||||||
| Rock Aetna | NSP-Minnesota | 20 | (a)(b) | ||||||||||||||
| Various PPAs | Various | 220 | (c) | ||||||||||||||
| Project | Utility Subsidiary | Capacity (MW) | Estimated Completion | ||||||||||||||||||||
| Northern Wind | NSP-Minnesota | 100 | 2023 | (a) | |||||||||||||||||||
| Grand Meadow Repower | NSP-Minnesota | 100 | 2023 | ||||||||||||||||||||
| Border Winds Repower | NSP-Minnesota | 150 | 2025 | ||||||||||||||||||||
| Pleasant Valley Repower | NSP-Minnesota | 200 | 2025 | ||||||||||||||||||||
| Type | Utility Subsidiary | Capacity (MW) | ||||||||||||
| Distributed Generation | NSP System | 1,074 | ||||||||||||
| Utility-Scale | NSP System | 269 | ||||||||||||
| Distributed Generation | PSCo | 848 | ||||||||||||
| Utility-Scale | PSCo | 732 | ||||||||||||
| Distributed Generation | SPS | 20 | ||||||||||||
| Utility-Scale | SPS | 192 | ||||||||||||
| Total | 3,135 | |||||||||||||
| Utility Subsidiary | 2022 | 2021 | ||||||||||||
| NSP System | $ | 79 | $ | 90 | ||||||||||
| PSCo | 69 | 67 | ||||||||||||
| SPS | 62 | 61 | ||||||||||||
| Utility Subsidiary | Nuclear | |||||||||||||
| NSP System | Cost | Percent | ||||||||||||
| 2022 | $ | 0.76 | 51 | % | ||||||||||
| 2021 | 0.77 | 50 | ||||||||||||
| Year | Utility Subsidiary | Plant Unit | Capacity (MW) | ||||||||||||||||||||
| 2023 | NSP-Minnesota | Sherco 2 | 682 | ||||||||||||||||||||
| 2024 | SPS | Harrington (a) | 1,018 | ||||||||||||||||||||
| 2025 | PSCo | Comanche 2 | 335 | ||||||||||||||||||||
| 2025 | PSCo | Craig 1 | 42 | (b) | |||||||||||||||||||
| 2025 | PSCo | Pawnee (c) | 505 | ||||||||||||||||||||
| 2026 | NSP-Minnesota | Sherco 1 | 680 | ||||||||||||||||||||
| 2027 | PSCo | Hayden 2 | 98 | (b) | |||||||||||||||||||
| 2028 | PSCo | Hayden 1 | 135 | (b) | |||||||||||||||||||
| 2028 | PSCo | Craig 2 | 40 | (b) | |||||||||||||||||||
| 2028 | NSP-Minnesota | A.S. King | 511 | ||||||||||||||||||||
| 2030 | NSP-Minnesota | Sherco 3 | 517 | (b) | |||||||||||||||||||
| 2030 | PSCo | Comanche 3 | 500 | (b) | |||||||||||||||||||
| 2034 | SPS | Tolk 1 (d) | 532 | ||||||||||||||||||||
| 2034 | SPS | Tolk 2 (d) | 535 | ||||||||||||||||||||
Coal (a) | ||||||||||||||
| Utility Subsidiary | Cost | Percent | ||||||||||||
| NSP System | ||||||||||||||
| 2022 | $ | 2.27 | 37 | % | ||||||||||
| 2021 | 1.95 | 34 | ||||||||||||
| PSCo | ||||||||||||||
| 2022 | 1.48 | 55 | ||||||||||||
| 2021 | 1.43 | 62 | ||||||||||||
| SPS | ||||||||||||||
| 2022 | 2.37 | 59 | ||||||||||||
| 2021 | 2.07 | 66 | ||||||||||||
| Natural Gas | ||||||||||||||
| Utility Subsidiary | Cost | Percent | ||||||||||||
| NSP System | ||||||||||||||
| 2022 | $ | 7.58 | 12 | % | ||||||||||
2021 (a) | 4.98 | 16 | ||||||||||||
| PSCo | ||||||||||||||
| 2022 | 7.09 | 45 | ||||||||||||
2021 (a) | 8.38 | 38 | ||||||||||||
| SPS | ||||||||||||||
| 2022 | 5.87 | 41 | ||||||||||||
2021 (a) | 6.72 | 34 | ||||||||||||
| System Peak Demand (MW) | ||||||||||||||||||||||||||
| 2022 | 2021 | |||||||||||||||||||||||||
NSP System | 9,245 | June 20 | 8,837 | June 9 | ||||||||||||||||||||||
| PSCo | 6,821 | Sept. 6 | 6,958 | July 28 | ||||||||||||||||||||||
| SPS | 4,280 | July 19 | 4,054 | Aug. 9 | ||||||||||||||||||||||
| Natural Gas Operations | ||
| Natural Gas (percentage of total) | Deliveries | Number of Customers | Revenues | |||||||||||||||||
| Residential | 38 | % | 92 | % | 59 | % | ||||||||||||||
| C&I | 24 | 8 | 32 | |||||||||||||||||
| Transportation and other | 38 | <1 | 9 | |||||||||||||||||
| 2022 | 2021 | |||||||||||||
| MMBtu sales per retail customer | 116 | 114 | ||||||||||||
| Revenue per retail customer | $ | 1,318 | $ | 917 | ||||||||||
| Residential revenue per MMBtu | 11.97 | 8.61 | ||||||||||||
| C&I revenue per MMBtu | 10.45 | 7.20 | ||||||||||||
| Transportation and other revenue per MMBtu | 1.16 | 1.20 | ||||||||||||
| 2022 | 2021 | |||||||||||||||||||||||||
| Utility Subsidiary | MMBtu | Date | MMBtu | Date (a) | ||||||||||||||||||||||
| NSP-Minnesota | 867,385 | Feb. 12 | 899,133 | Feb. 11 | ||||||||||||||||||||||
| NSP-Wisconsin | 187,961 | Jan. 6 | 167,656 | Feb. 11 | ||||||||||||||||||||||
| PSCo | 2,243,552 | Dec. 22 | 2,316,283 | Feb. 14 | ||||||||||||||||||||||
| Utility Subsidiary | 2022 | 2021 (a) | ||||||||||||
| NSP-Minnesota | $ | 7.00 | $ | 7.48 | ||||||||||
| NSP-Wisconsin | 6.68 | 7.11 | ||||||||||||
| PSCo | 6.33 | 6.06 | ||||||||||||
| General | ||
| Governmental Regulations | ||
| Capital Spending and Financing | ||
Information about our Executive Officers (a) | ||||||||||||||||||||
| Name | Age (b) | Current and Recent Positions | Time in Position | |||||||||||||||||
| Robert C. Frenzel | 52 | Chairman of the Board of Directors, Xcel Energy Inc. | December 2021 — Present | |||||||||||||||||
| President and Chief Executive Officer and Director, Xcel Energy Inc. | August 2021 — Present | |||||||||||||||||||
| Chief Executive Officer, NSP-Minnesota, NSP-Wisconsin, PSCo, and SPS | August 2021 — Present | |||||||||||||||||||
| President and Chief Operating Officer, Xcel Energy Inc. | March 2020 — August 2021 | |||||||||||||||||||
| Executive Vice President, Chief Financial Officer, Xcel Energy Inc. | May 2016 — March 2020 | |||||||||||||||||||
Senior Vice President and Chief Financial Officer, Luminant, a subsidiary of Energy Future Holdings Corp. (c) | February 2012 — April 2016 | |||||||||||||||||||
| Brett C. Carter | 56 | Executive Vice President, Group President, Utilities, and Chief Customer Officer, Xcel Energy Inc. | March 2022 — Present | |||||||||||||||||
| Executive Vice President and Chief Customer and Innovation Officer, Xcel Energy Inc. | May 2018 — March 2022 | |||||||||||||||||||
| Senior Vice President and Shared Services Executive, Bank of America, an institutional investment bank and financial services company | October 2015 — May 2018 | |||||||||||||||||||
| Patricia Correa | 49 | Senior Vice President, Chief Human Resources Officer, Xcel Energy Inc. | February 2022 — Present | |||||||||||||||||
| Senior Vice President, Human Resources, Eaton Corporation, a power management company | July 2019 — January 2022 | |||||||||||||||||||
| Vice President, Human Resources, Eaton Corporation | March 2016 — July 2019 | |||||||||||||||||||
| Timothy O’Connor | 63 | Executive Vice President, Chief Operations Officer, Xcel Energy Inc. | August 2021 — Present | |||||||||||||||||
| Executive Vice President, Chief Generation Officer, Xcel Energy Inc. | March 2020 — August 2021 | |||||||||||||||||||
| Senior Vice President, Chief Nuclear Officer, Xcel Energy Services Inc | February 2013 — March 2020 | |||||||||||||||||||
| Frank Prager | 60 | Senior Vice President, Strategy, Security and External Affairs and Chief Sustainability Officer, Xcel Energy Inc. | March 2022 — Present | |||||||||||||||||
| Senior Vice President, Strategy, Planning and External Affairs, Xcel Energy Inc. | March 2020 — March 2022 | |||||||||||||||||||
| Vice President, Policy and Federal Affairs, Xcel Energy Services Inc. | January 2015 — March 2020 | |||||||||||||||||||
| Amanda Rome | 42 | Executive Vice President, Chief Legal and Compliance Officer, Xcel Energy Inc. | June 2022 — Present | |||||||||||||||||
| Executive Vice President, General Counsel, Xcel Energy Inc. | June 2020 — June 2022 | |||||||||||||||||||
| Vice President and Deputy General Counsel, Xcel Energy Services Inc. | October 2019 — June 2020 | |||||||||||||||||||
| Managing Attorney, Xcel Energy Services Inc. | July 2018 — October 2019 | |||||||||||||||||||
| Rotational Position, Xcel Energy Services Inc. | January 2018 — July 2018 | |||||||||||||||||||
| Lead Assistant General Counsel, Xcel Energy Services Inc. | July 2015 — January 2018 | |||||||||||||||||||
| Brian J. Van Abel | 41 | Executive Vice President, Chief Financial Officer, Xcel Energy Inc. | March 2020 — Present | |||||||||||||||||
| Senior Vice President, Finance and Corporate Development, Xcel Energy Services Inc. | September 2018 — March 2020 | |||||||||||||||||||
| Vice President, Treasurer, Xcel Energy Services Inc. | July 2015 — September 2018 | |||||||||||||||||||
ITEM 1A — RISK FACTORS | ||
ITEM 1B — UNRESOLVED STAFF COMMENTS | ||
ITEM 2 — PROPERTIES | ||
NSP-Minnesota Station, Location and Unit at Dec. 31, 2022 | Fuel | Installed | MW (a) | ||||||||||||||||||||
| Steam: | |||||||||||||||||||||||
| A.S. King-Bayport, MN, 1 Unit | Coal | 1968 | 511 | ||||||||||||||||||||
| Sherco-Becker, MN | |||||||||||||||||||||||
| Unit 1 | Coal | 1976 | 680 | ||||||||||||||||||||
| Unit 2 | Coal | 1977 | 682 | ||||||||||||||||||||
| Unit 3 | Coal | 1987 | 517 | (b) | |||||||||||||||||||
| Monticello, MN, 1 Unit | Nuclear | 1971 | 617 | ||||||||||||||||||||
| PI-Welch, MN | |||||||||||||||||||||||
| Unit 1 | Nuclear | 1973 | 521 | ||||||||||||||||||||
| Unit 2 | Nuclear | 1974 | 519 | ||||||||||||||||||||
| Various locations, 4 Units | Wood/Refuse | Various | 36 | (c) | |||||||||||||||||||
| Combustion Turbine: | |||||||||||||||||||||||
| Angus Anson-Sioux Falls, SD, 3 Units | Natural Gas | 1994 - 2005 | 327 | ||||||||||||||||||||
| Black Dog-Burnsville, MN, 3 Units | Natural Gas | 1987 - 2018 | 494 | ||||||||||||||||||||
| Blue Lake-Shakopee, MN, 6 Units | Natural Gas | 1974 - 2005 | 447 | ||||||||||||||||||||
| High Bridge-St. Paul, MN, 3 Units | Natural Gas | 2008 | 530 | ||||||||||||||||||||
| Inver Hills-Inver Grove Heights, MN, 6 Units | Natural Gas | 1972 | 252 | ||||||||||||||||||||
| Riverside-Minneapolis, MN, 3 Units | Natural Gas | 2009 | 454 | ||||||||||||||||||||
| Various locations, 7 Units | Natural Gas | Various | 10 | ||||||||||||||||||||
| Wind: | |||||||||||||||||||||||
| Blazing Star 1-Lincoln County, MN, 100 Units | Wind | 2020 | 200 | (d) | |||||||||||||||||||
| Blazing Star 2-Lincoln County, MN, 100 Units | Wind | 2021 | 200 | (d) | |||||||||||||||||||
| Border-Rolette County, ND, 75 Units | Wind | 2015 | 148 | (d) | |||||||||||||||||||
| Community Wind North-Lincoln County, MN, 12 Units | Wind | 2020 | 26 | (d) | |||||||||||||||||||
| Courtenay Wind-Stutsman County, ND, 100 Units | Wind | 2016 | 190 | (d) | |||||||||||||||||||
| Crowned Ridge 2-Grant County, SD, 88 Units | Wind | 2020 | 192 | (d) | |||||||||||||||||||
| Dakota Range, SD, 72 Units | Wind | 2022 | 298 | (d) | |||||||||||||||||||
| Foxtail-Dickey County, ND, 75 Units | Wind | 2019 | 150 | (d) | |||||||||||||||||||
| Freeborn-Freeborn County, MN, 100 Units | Wind | 2021 | 200 | (d) | |||||||||||||||||||
| Grand Meadow-Mower County, MN, 67 Units | Wind | 2008 | 99 | (d) | |||||||||||||||||||
| Jeffers-Cottonwood County, MN, 20 Units | Wind | 2020 | 43 | (d) | |||||||||||||||||||
| Lake Benton-Pipestone County, MN, 44 Units | Wind | 2019 | 99 | (d) | |||||||||||||||||||
| Mower-Mower County, MN, 43 Units | Wind | 2021 | 91 | (d) | |||||||||||||||||||
Nobles-Nobles County, MN, 133 Units (e) | Wind | 2010 | 200 | (d) | |||||||||||||||||||
| Pleasant Valley-Mower County, MN, 100 Units | Wind | 2015 | 196 | (d) | |||||||||||||||||||
| Rock Aetna - Murray County, MN, 8 Units | Wind | 2022 | 20 | (d) | |||||||||||||||||||
| Total | 8,949 | ||||||||||||||||||||||
NSP-Wisconsin Station, Location and Unit at Dec. 31, 2022 | Fuel | Installed | MW (a) | ||||||||||||||||||||
| Steam: | |||||||||||||||||||||||
| Bay Front-Ashland, WI, 2 Units | Wood/Natural Gas | 1948 - 1956 | 41 | ||||||||||||||||||||
| French Island-La Crosse, WI, 2 Units | Wood/Refuse | 1940 - 1948 | 16 | (b) | |||||||||||||||||||
| Combustion Turbine: | |||||||||||||||||||||||
| French Island-La Crosse, WI, 2 Units | Oil | 1974 | 122 | ||||||||||||||||||||
| Wheaton-Eau Claire, WI, 5 Units | Natural Gas/Oil | 1973 | 234 | ||||||||||||||||||||
| Hydro: | |||||||||||||||||||||||
| Various locations, 62 Units | Hydro | Various | 135 | ||||||||||||||||||||
| Total | 548 | ||||||||||||||||||||||
PSCo Station, Location and Unit at Dec. 31, 2022 | Fuel | Installed | MW (a) | ||||||||||||||||||||
| Steam: | |||||||||||||||||||||||
| Comanche-Pueblo, CO | |||||||||||||||||||||||
| Unit 2 | Coal | 1975 | 335 | ||||||||||||||||||||
| Unit 3 | Coal | 2010 | 500 | (b) | |||||||||||||||||||
| Craig-Craig, CO, 2 Units | Coal | 1979 - 1980 | 82 | (c) | |||||||||||||||||||
Hayden-Hayden, CO, 2 Units | Coal | 1965 - 1976 | 233 | (d) | |||||||||||||||||||
| Pawnee-Brush, CO, 1 Unit | Coal | 1981 | 505 | ||||||||||||||||||||
| Cherokee-Denver, CO, 1 Unit | Natural Gas | 1968 | 310 | ||||||||||||||||||||
| Combustion Turbine: | |||||||||||||||||||||||
| Blue Spruce-Aurora, CO, 2 Units | Natural Gas | 2003 | 264 | ||||||||||||||||||||
| Cherokee-Denver, CO, 3 Units | Natural Gas | 2015 | 576 | ||||||||||||||||||||
| Fort St. Vrain-Platteville, CO, 6 Units | Natural Gas | 1972 - 2009 | 973 | ||||||||||||||||||||
Manchief, CO, 2 Units (e) | Natural Gas | 2000 | 250 | ||||||||||||||||||||
| Rocky Mountain-Keenesburg, CO, 3 Units | Natural Gas | 2004 | 580 | ||||||||||||||||||||
| Various locations, 8 Units | Natural Gas | Various | 251 | ||||||||||||||||||||
| Hydro: | |||||||||||||||||||||||
| Cabin Creek-Georgetown, CO | |||||||||||||||||||||||
| Pumped Storage, 2 Units | Hydro | 1967 | 210 | ||||||||||||||||||||
| Various locations, 6 Units | Hydro | Various | 23 | ||||||||||||||||||||
| Wind: | |||||||||||||||||||||||
| Rush Creek, CO, 300 units | Wind | 2018 | 582 | (f) | |||||||||||||||||||
| Cheyenne Ridge, CO, 229 units | Wind | 2020 | 477 | (f) | |||||||||||||||||||
| Total | 6,151 | ||||||||||||||||||||||
SPS Station, Location and Unit at Dec. 31, 2022 | Fuel | Installed | MW (a) | ||||||||||||||||||||
| Steam: | |||||||||||||||||||||||
| Cunningham-Hobbs, NM, 2 Units | Natural Gas | 1957 - 1965 | 225 | ||||||||||||||||||||
| Harrington-Amarillo, TX, 3 Units | Coal | 1976 - 1980 | 1,018 | ||||||||||||||||||||
| Jones-Lubbock, TX, 2 Units | Natural Gas | 1971 - 1974 | 486 | ||||||||||||||||||||
| Maddox-Hobbs, NM, 1 Unit | Natural Gas | 1967 | 112 | ||||||||||||||||||||
| Nichols-Amarillo, TX, 3 Units | Natural Gas | 1960 - 1968 | 457 | ||||||||||||||||||||
| Plant X-Earth, TX, 3 Units | Natural Gas | 1952 - 1964 | 298 | ||||||||||||||||||||
| Tolk-Muleshoe, TX, 2 Units | Coal | 1982 - 1985 | 1,067 | ||||||||||||||||||||
| Combustion Turbine: | |||||||||||||||||||||||
| Cunningham-Hobbs, NM, 2 Units | Natural Gas | 1997 | 207 | ||||||||||||||||||||
| Jones-Lubbock, TX, 2 Units | Natural Gas | 2011 - 2013 | 334 | ||||||||||||||||||||
| Maddox-Hobbs, NM, 1 Unit | Natural Gas | 1963 - 1976 | 61 | ||||||||||||||||||||
| Wind: | |||||||||||||||||||||||
| Hale-Plainview, TX, 239 Units | Wind | 2019 | 477 | (b) | |||||||||||||||||||
| Sagamore-Dora, NM, 240 Units | Wind | 2020 | 507 | (b) | |||||||||||||||||||
| Total | 5,249 | ||||||||||||||||||||||
| Conductor Miles | NSP-Minnesota | NSP-Wisconsin | PSCo | SPS | ||||||||||||||||||||||
| Transmission | ||||||||||||||||||||||||||
| 500 KV | 2,915 | — | — | — | ||||||||||||||||||||||
| 345 KV | 12,183 | 2,457 | 5,418 | 11,676 | ||||||||||||||||||||||
| 230 KV | 2,300 | — | 12,141 | 9,829 | ||||||||||||||||||||||
| 161 KV | 626 | 1,795 | — | — | ||||||||||||||||||||||
| 138 KV | — | — | 92 | — | ||||||||||||||||||||||
| 115 KV | 8,033 | 1,829 | 5,011 | 14,905 | ||||||||||||||||||||||
| Less than 115 KV | 6,537 | 5,571 | 1,839 | 4,469 | ||||||||||||||||||||||
| Total Transmission | 32,594 | 11,652 | 24,501 | 40,879 | ||||||||||||||||||||||
| Distribution | ||||||||||||||||||||||||||
| Less than 115 KV | 82,024 | 27,817 | 79,331 | 23,538 | ||||||||||||||||||||||
| Total | 114,618 | 39,469 | 103,832 | 64,417 | ||||||||||||||||||||||
| NSP-Minnesota | NSP-Wisconsin | PSCo | SPS | |||||||||||||||||||||||
| Substations | 352 | 206 | 238 | 457 | ||||||||||||||||||||||
| Miles | NSP-Minnesota | NSP-Wisconsin | PSCo | SPS | WGI | |||||||||||||||||||||||||||
| Transmission | 78 | 3 | 2,067 | 20 | 11 | |||||||||||||||||||||||||||
| Distribution | 10,902 | 2,570 | 23,542 | — | — | |||||||||||||||||||||||||||
ITEM 3 — LEGAL PROCEEDINGS | ||
ITEM 4 — MINE SAFETY DISCLOSURES | ||
ITEM 5 — MARKET FOR REGISTRANT’S COMMON EQUITY, RELATED STOCKHOLDER MATTERS AND ISSUER PURCHASES OF EQUITY SECURITIES. | ||

ITEM 6 — [RESERVED] | ||
| ITEM 7 — MANAGEMENT’S DISCUSSION AND ANALYSIS OF FINANCIAL CONDITION AND RESULTS OF OPERATIONS | ||
Results of Operations | ||
| 2022 | 2021 | |||||||||||||
| Diluted Earnings (Loss) Per Share | GAAP and Ongoing Diluted EPS | GAAP and Ongoing Diluted EPS | ||||||||||||
| PSCo | $ | 1.33 | $ | 1.22 | ||||||||||
| NSP-Minnesota | 1.23 | 1.12 | ||||||||||||
| SPS | 0.64 | 0.59 | ||||||||||||
| NSP-Wisconsin | 0.23 | 0.20 | ||||||||||||
| Earnings from equity method investments — WYCO | 0.04 | 0.05 | ||||||||||||
Regulated utility (a) | 3.47 | 3.18 | ||||||||||||
| Xcel Energy Inc. and Other | (0.29) | (0.22) | ||||||||||||
Total (a) | $ | 3.17 | $ | 2.96 | ||||||||||
| 2022 vs. 2021 | ||||||||
| Diluted Earnings (Loss) Per Share | Dec. 31 | |||||||
| GAAP and ongoing diluted EPS — 2021 | $ | 2.96 | ||||||
| Components of change — 2022 vs. 2021 | ||||||||
| Higher electric revenues, net of electric fuel and purchased power | 0.89 | |||||||
| Higher natural gas revenues, net of cost of natural gas sold and transported | 0.16 | |||||||
Lower ETR (a) | 0.15 | |||||||
| Higher depreciation and amortization | (0.40) | |||||||
| Higher O&M expenses | (0.24) | |||||||
| Higher interest expense | (0.15) | |||||||
| Higher taxes (other than income taxes) | (0.08) | |||||||
| Other (net) | (0.12) | |||||||
| GAAP and ongoing diluted EPS — 2022 | $ | 3.17 | ||||||
| 2022 | 2021 | |||||||||||||
| ROE | GAAP and Ongoing ROE | GAAP and Ongoing ROE | ||||||||||||
| PSCo | 8.23 | % | 8.23 | % | ||||||||||
| NSP-Minnesota | 8.76 | 8.45 | ||||||||||||
| SPS | 9.36 | 9.22 | ||||||||||||
| NSP-Wisconsin | 10.57 | 9.92 | ||||||||||||
| Operating Companies | 8.74 | 8.58 | ||||||||||||
| Xcel Energy | 10.76 | 10.58 | ||||||||||||
| 2022 vs. Normal | 2021 vs. Normal | 2022 vs. 2021 | |||||||||||||||
| HDD | 6.5 | % | (6.6) | % | 13.0 | % | |||||||||||
| CDD | 23.7 | 12.2 | 16.1 | ||||||||||||||
| THI | 5.6 | 26.8 | (15.8) | ||||||||||||||
| 2022 vs. Normal | 2021 vs. Normal | 2022 vs. 2021 | |||||||||||||||
| Retail electric | $ | 0.138 | $ | 0.096 | $ | 0.042 | |||||||||||
| Decoupling and sales true-up | (0.061) | (0.066) | 0.005 | ||||||||||||||
| Electric total | $ | 0.077 | $ | 0.030 | $ | 0.047 | |||||||||||
| Firm natural gas | 0.037 | (0.025) | 0.062 | ||||||||||||||
| Total | $ | 0.114 | $ | 0.005 | $ | 0.109 | |||||||||||
| 2022 vs. 2021 | ||||||||||||||||||||||||||||||||
| PSCo | NSP-Minnesota | SPS | NSP-Wisconsin | Xcel Energy | ||||||||||||||||||||||||||||
| Actual | ||||||||||||||||||||||||||||||||
| Electric residential | (1.5) | % | (1.2) | % | 6.5 | % | 1.1 | % | (0.1) | % | ||||||||||||||||||||||
| Electric C&I | — | 1.7 | 8.9 | 3.3 | 3.3 | |||||||||||||||||||||||||||
| Total retail electric sales | (0.5) | 0.8 | 8.4 | 2.6 | 2.3 | |||||||||||||||||||||||||||
| Firm natural gas sales | 5.4 | 18.3 | N/A | 17.3 | 10.1 | |||||||||||||||||||||||||||
| 2022 vs. 2021 | ||||||||||||||||||||||||||||||||
| PSCo | NSP-Minnesota | SPS | NSP-Wisconsin | Xcel Energy | ||||||||||||||||||||||||||||
| Weather-normalized | ||||||||||||||||||||||||||||||||
| Electric residential | (3.6) | % | (0.2) | % | 0.8 | % | — | % | (1.3) | % | ||||||||||||||||||||||
| Electric C&I | (0.3) | 2.1 | 8.4 | 3.4 | 3.2 | |||||||||||||||||||||||||||
| Total retail electric sales | (1.4) | 1.3 | 6.9 | 2.4 | 1.8 | |||||||||||||||||||||||||||
| Firm natural gas sales | (3.1) | 5.5 | N/A | 5.8 | 0.1 | |||||||||||||||||||||||||||
| (Millions of Dollars) | 2022 | 2021 | ||||||||||||
| Electric revenues | $ | 12,123 | $ | 11,205 | ||||||||||
| Electric fuel and purchased power | (5,005) | (4,733) | ||||||||||||
| Electric margin | $ | 7,118 | $ | 6,472 | ||||||||||
| (Millions of Dollars) | 2022 vs. 2021 | |||||||
| Regulatory rate outcomes (Minnesota, Colorado, Texas, New Mexico and Wisconsin) | $ | 506 | ||||||
Revenue recognition for the Texas rate case surcharge (a) | 85 | |||||||
Sales and demand (b) | 80 | |||||||
| Non-fuel riders | 64 | |||||||
| Wholesale transmission (net) | 50 | |||||||
| Estimated impact of weather (net of decoupling/sales true-up) | 33 | |||||||
| PTCs flowed back to customers (offset by lower ETR) | (150) | |||||||
| Other (net) | (22) | |||||||
| Total increase | $ | 646 | ||||||
| (Millions of Dollars) | 2022 | 2021 | ||||||||||||
| Natural gas revenues | $ | 3,080 | $ | 2,132 | ||||||||||
| Cost of natural gas sold and transported | (1,910) | (1,081) | ||||||||||||
| Natural gas margin | $ | 1,170 | $ | 1,051 | ||||||||||
| (Millions of Dollars) | 2022 vs. 2021 | |||||||
| Regulatory rate outcomes (Minnesota, Colorado, Wisconsin, North Dakota) | $ | 61 | ||||||
| Estimated impact of weather | 46 | |||||||
| Conservation revenue (offset in expenses) | 13 | |||||||
| Infrastructure and integrity riders | 9 | |||||||
| Winter Storm Uri disallowances | (20) | |||||||
| Other (net) | 10 | |||||||
| Total increase | $ | 119 | ||||||
| Contribution (Millions of Dollars) | ||||||||||||||
| 2022 | 2021 | |||||||||||||
| Xcel Energy Inc. financing costs | $ | (153) | $ | (129) | ||||||||||
Venture Holdings (a) | 5 | 21 | ||||||||||||
| Xcel Energy Inc. taxes and other results | (12) | (12) | ||||||||||||
| Total Xcel Energy Inc. and other costs | $ | (160) | $ | (120) | ||||||||||
| Contribution (Diluted Earnings (Loss) Per Share) | ||||||||||||||
| 2022 | 2021 | |||||||||||||
| Xcel Energy Inc. financing costs | $ | (0.28) | $ | (0.24) | ||||||||||
Venture Holdings (a) | 0.01 | 0.04 | ||||||||||||
| Xcel Energy Inc. taxes and other results | (0.02) | (0.02) | ||||||||||||
| Total Xcel Energy Inc. and other costs | $ | (0.29) | $ | (0.22) | ||||||||||
| Public Utility Regulation | ||
| Regulatory Body / RTO | Additional Information | |||||||
| MPUC | Retail rates, services, security issuances, property transfers, mergers, disposition of assets, affiliate transactions, and other aspects of electric and natural gas operations. Reviews and approves Integrated Resource Plans for meeting future energy needs. Certifies the need and siting for generating plants greater than 50 MW and transmission lines greater than 100 KV in Minnesota. Reviews and approves natural gas supply plans. | |||||||
| NDPSC | Retail rates, services and other aspects of electric and natural gas operations. Reviews and approves Integrated Resource Plans for meeting future energy needs. Regulatory authority over generation and transmission facilities, along with the siting and routing of new generation and transmission facilities in North Dakota. Pipeline safety compliance. | |||||||
| SDPUC | Retail rates, services and other aspects of electric operations. Regulatory authority over generation and transmission facilities, along with the siting and routing of new generation and transmission facilities in South Dakota. Pipeline safety compliance. | |||||||
| FERC | Wholesale electric operations, hydroelectric licensing, accounting practices, wholesale sales for resale, transmission of electricity in interstate commerce, compliance with NERC electric reliability standards, asset transfers and mergers, and natural gas transactions in interstate commerce. | |||||||
| MISO | NSP-Minnesota is a transmission owning member of the MISO RTO and operates within the MISO RTO and wholesale markets. NSP-Minnesota makes wholesale sales in other RTO markets at market-based rates. NSP-Minnesota and NSP-Wisconsin also make wholesale electric sales at market-based prices to customers outside of their balancing authority as jointly authorized by the FERC. | |||||||
| DOT | Pipeline safety compliance. | |||||||
| Minnesota Office of Pipeline Safety | Pipeline safety compliance. | |||||||
| Mechanism | Additional Information | |||||||
CIP Rider (a) | Recovers costs of conservation and DSM programs in Minnesota. | |||||||
| Environmental Improvement Rider | Recovers costs of environmental improvement projects in Minnesota. | |||||||
| Renewable Development Fund | Allocates money collected from customers to support research and development of emerging renewable energy projects and technologies in Minnesota. | |||||||
| RES | Recovers cost of renewable generation in Minnesota. | |||||||
| Renewable Energy Rider | Recovers cost of renewable generation in North Dakota. | |||||||
| Transmission Cost Recovery | Recovers costs for investments in Minnesota, North Dakota, and South Dakota for electric transmission and distribution grid modernization. | |||||||
| Infrastructure Rider | Recovers costs for investments in generation in South Dakota. | |||||||
| FCA | Recovers prudently incurred costs of fuel related items and purchased energy (Minnesota, North Dakota and South Dakota). | |||||||
| Purchased Gas Adjustment | Provides for prospective monthly rate adjustments in Minnesota and North Dakota for costs of purchased natural gas, transportation and storage service. Includes a true-up process for difference between projected and actual costs. | |||||||
| GUIC Rider | Recovers costs for transmission and distribution pipeline integrity management programs, including funding for pipeline assessments, deferred costs for sewer separation and pipeline integrity management programs in Minnesota. The statute authorizing the GUIC Rider is set to expire June 30, 2023. | |||||||
| Sales True-up | NSP-Minnesota has historically had a sales true-up mechanism for all electric customer classes which ended in 2021. We are requesting implementation of a new sales true-up mechanism for 2022 - 2024. These mechanisms mitigate the impact of changes to sales levels as compared to a baseline. | |||||||
| (Amounts in Millions) | 2022 | 2023 | 2024 | Total | ||||||||||||||||||||||
| Rate request (annual increase) | $ | 234 | $ | 94 | $ | 170 | $ | 498 | ||||||||||||||||||
| Rate base | 10,923 | 11,425 | 11,902 | N/A | ||||||||||||||||||||||
| 2022 | 2023 | 2024 | ||||||||||||||||||
| NSP-Minnesota’s filed base revenue request | $ | 396 | $ | 546 | $ | 677 | ||||||||||||||
| Recommended adjustments: | ||||||||||||||||||||
| Rate base and rate of return | (72) | (65) | (65) | |||||||||||||||||
| MISO capacity credits | (66) | (112) | (111) | |||||||||||||||||
| Sales forecast update | (51) | — | — | |||||||||||||||||
| Monticello and wind farm life extension | (21) | (54) | (51) | |||||||||||||||||
| PTC forecast | (28) | (1) | (1) | |||||||||||||||||
| Property tax | (14) | (23) | (34) | |||||||||||||||||
| Prepaid pension asset and liability | (13) | (21) | (32) | |||||||||||||||||
| O&M expenses | (37) | (39) | (44) | |||||||||||||||||
| Sherco 3 and King remaining life | — | 29 | 28 | |||||||||||||||||
| Other, net | (23) | (33) | (43) | |||||||||||||||||
| Total adjustments | (325) | (319) | (353) | |||||||||||||||||
| Total proposed revenue change | $ | 71 | $ | 227 | $ | 324 | ||||||||||||||
| Regulatory Body / RTO | Additional Information | |||||||
| PSCW | Retail rates, services and other aspects of electric and natural gas operations. Certifies the need for new generating plants and electric transmission lines before the facilities may be sited and built. The PSCW has a biennial base rate filing requirement. By June of each odd numbered year, NSP-Wisconsin must submit a rate filing for the test year beginning the following January. Pipeline safety compliance. | |||||||
| Michigan Public Service Commission | Retail rates, services and other aspects of electric and natural gas operations. Certifies the need for new generating plants and electric transmission lines before the facilities may be sited and built. Pipeline safety compliance. | |||||||
| FERC | Wholesale electric operations, hydroelectric generation licensing, accounting practices, wholesale sales for resale, transmission of electricity in interstate commerce, compliance with NERC electric reliability standards, asset transactions and mergers and natural gas transactions in interstate commerce. | |||||||
| MISO | NSP-Wisconsin is a transmission owning member of the MISO RTO that operates within the MISO RTO and wholesale energy market. NSP-Wisconsin and NSP-Minnesota are jointly authorized by the FERC to make wholesale electric sales at market-based prices. | |||||||
| DOT | Pipeline safety compliance. | |||||||
| Mechanism | Additional Information | |||||||
| Annual Fuel Cost Plan | NSP-Wisconsin does not have an automatic electric fuel adjustment clause. Under Wisconsin rules, utilities submit a forward-looking annual fuel cost plan to the PSCW. Once the PSCW approves the plan, utilities defer the amount of any fuel cost under-recovery or over-recovery in excess of a 2% annual tolerance band, for future rate recovery or refund. Approval of a fuel cost plan and any rate adjustment for refund or recovery of deferred costs is determined by the PSCW. Rate recovery of deferred fuel cost is subject to an earnings test based on the most recently authorized ROE. Under-collections that exceed the 2% annual tolerance band may not be recovered if the utility earnings for that year exceed the authorized ROE. | |||||||
| Power Supply Cost Recovery Factors | NSP-Wisconsin’s retail electric rate schedules for Michigan customers include power supply cost recovery factors, based on 12-month projections. After each 12-month period, a reconciliation is submitted whereby over-recoveries are refunded and any under-recoveries are collected from customers. | |||||||
| Wisconsin Energy Efficiency Program | The primary energy efficiency program is funded by the utilities, but operated by independent contractors subject to oversight by the PSCW and utilities. NSP-Wisconsin recovers these costs from customers. | |||||||
| Purchased Gas Adjustment | A retail cost-recovery mechanism to recover the actual cost of natural gas, transportation, and storage services. | |||||||
| Natural Gas Cost-Recovery Factor (MI) | NSP-Wisconsin’s natural gas rates for Michigan customers include a natural gas cost-recovery factor, based on 12-month projections and trued-up to actual amounts on an annual basis. | |||||||
| Regulatory Body / RTO | Additional Information on Regulatory Authority | |||||||
| CPUC | Retail rates, accounts, services, issuance of securities and other aspects of electric, natural gas and steam operations. Reviews and approves Integrated Resource Plans for meeting future energy needs. Certifies the need and siting for generating plans greater than 50 MW. Pipeline safety compliance. | |||||||
| FERC | Wholesale electric operations, accounting practices, hydroelectric licensing, wholesale sales for resale, transmission of electricity in interstate commerce, compliance with the NERC electric reliability standards, asset transactions and mergers and natural gas transactions in interstate commerce. Wholesale electric sales at cost-based prices to customers inside PSCo’s balancing authority area and at market-based prices to customers outside PSCo’s balancing authority area. PSCo holds a FERC certificate that allows it to transport natural gas in interstate commerce without PSCo becoming subject to full FERC jurisdiction. | |||||||
| RTO | PSCo is not presently a member of an RTO and does not operate within an RTO energy market. However, PSCo does make certain sales to other RTO’s, including SPP and participates in a joint dispatch agreement with neighboring utilities. | |||||||
| DOT | Pipeline safety compliance. | |||||||
| Mechanism | Additional Information | |||||||
| ECA | Recovers fuel and purchased energy costs. Short-term sales margins are shared with customers. The ECA is revised quarterly. | |||||||
| Purchased Capacity Cost Adjustment | Recovers purchased capacity payments. | |||||||
| Steam Cost Adjustment | Recovers fuel costs to operate the steam system. The Steam Cost Adjustment rate is revised quarterly. | |||||||
| DSM Cost Adjustment | Recovers electric and gas DSM, interruptible service costs and performance initiatives for achieving energy savings goals. | |||||||
| RES Adjustment | Recovers the incremental costs of compliance with the RES with a maximum of 1% of the customer’s bill. | |||||||
| Colorado Energy Plan Adjustment | Recovers the early retirement costs of Comanche units 1 and 2 to a maximum of 1% of the customer’s bill. | |||||||
| Wind Cost Adjustment | Recovers costs for customers who choose renewable resources. | |||||||
| Transmission Cost Adjustment | Recovers costs for transmission investment between rate cases. | |||||||
| FCA | PSCo recovers fuel and purchased energy costs from wholesale electric customers through a fuel cost adjustment clause approved by the FERC. Wholesale customers pay production costs through a forecasted formula rate subject to true-up. | |||||||
| GCA | Recovers costs of purchased natural gas and transportation and is revised quarterly to allow for changes in natural gas rates. | |||||||
| Pipeline system integrity adjustment | Recovers costs for transmission and distribution pipeline integrity management programs (rider ended on Dec. 31, 2022). | |||||||
| Decoupling | Mechanism to true-up revenue to a baseline amount for residential (excluding lighting and demand) and metered non-demand small C&I classes. | |||||||
| Transportation Electrification Plan | Recovers costs associated with the investment in and adoption of transportation electrification infrastructure. | |||||||
| Regulatory Body / RTO | Additional Information | |||||||
| PUCT | Retail electric operations, rates, services, construction of transmission or generation and other aspects of SPS’ electric operations. The municipalities in which SPS operates in Texas have original jurisdiction over rates in those communities. The municipalities’ rate setting decisions are subject to PUCT review. Reviews and approves Integrated Resource Plans for meeting future energy needs | |||||||
| NMPRC | Retail electric operations, retail rates and services and the construction of transmission or generation. | |||||||
| FERC | Wholesale electric operations, accounting practices, wholesale sales for resale, the transmission of electricity in interstate commerce, compliance with NERC electric reliability standards, asset transactions and mergers, and natural gas transactions in interstate commerce. | |||||||
| SPP RTO and SPP Integrated and Wholesale Markets | SPS is a transmission owning member of the SPP RTO and operates within the SPP RTO and SPP integrated and wholesale markets. SPS is authorized to make wholesale electric sales at market-based prices. | |||||||
| DOT | Pipeline safety compliance. | |||||||
| Mechanism | Additional Information | |||||||
| Distribution Cost Recovery Factor | Recovers distribution costs not included in rates in Texas. | |||||||
| Energy Efficiency Cost Recovery Factor | Recovers costs for energy efficiency programs in Texas. | |||||||
| Energy Efficiency Rider | Recovers costs for energy efficiency programs in New Mexico. | |||||||
| Fuel and Purchased Power Cost Adjustment Clause | Adjusts monthly to recover actual fuel and purchased power costs in New Mexico. | |||||||
| Power Cost Recovery Factor | Allows recovery of purchased power costs not included in Texas rates. | |||||||
| Renewable Portfolio Standards | Recovers deferred costs for renewable energy programs in New Mexico. | |||||||
| Transmission Cost Recovery Factor | Recovers certain transmission infrastructure improvement costs and changes in wholesale transmission charges not included in Texas base rates. | |||||||
| Fixed Fuel and Purchased Recovery Factor | Provides for the over- or under-recovery of energy expenses in Texas. Regulations require refunding or surcharging over- or under- recovery amounts, including interest, when they exceed 4% of the utility’s annual fuel and purchased energy costs on a rolling 12-month basis if this condition is expected to continue. | |||||||
| Wholesale Fuel and Purchased Energy Cost Adjustment | SPS recovers fuel and purchased energy costs from its wholesale customers through a monthly wholesale fuel and purchased energy cost adjustment clause accepted by the FERC. Wholesale customers also pay the jurisdictional allocation of production costs. | |||||||
| Electric Vehicle Rider | Recovers costs of the Transportation Electrification Plan in New Mexico. | |||||||
| Advanced Metering System Surcharge | Recovers costs incurred in deployment of the Advanced Metering System in Texas. | |||||||
| Consulting Fee Rider | Recovers consulting fees and carrying charges incurred by SPS on behalf of the PUCT. | |||||||
| (Millions of Dollars) | Year Ended Dec. 31, 2022 | |||||||
| Revenue surcharge accrual | $ | 85 | ||||||
| Depreciation and amortization | (43) | |||||||
| O&M expenses | (16) | |||||||
| Interest expense | (12) | |||||||
| Taxes other than income taxes | (10) | |||||||
| Fuel and purchased power | (2) | |||||||
| Other | ||
| Utility Subsidiary | Jurisdiction | Regulatory Status | ||||||
| NSP-Minnesota | Minnesota | In 2021, the MPUC allowed recovery of $179 million of costs (with no financing charge) starting in September 2021, pending a prudency review. The C&I class ($82 million) will be recovered over 27 months and the residential class ($97 million) will be recovered over a 63-month recovery period. In August 2022, the MPUC approved recovery of Uri storm costs with a $19 million disallowance. | ||||||
| PSCo | Colorado | In May 2021, PSCo filed a request with the CPUC to recover $263 million in weather-related electric costs, $287 million in incremental natural gas costs and $4 million in incremental steam costs over 24 months with no financing charge. In July 2022, the CPUC approved a partial settlement providing full recovery of fuel costs, with the exception of an $8 million disallowance, over 24 months for electric and 30 months for natural gas customers. | ||||||
| SPS | Texas | In 2021, SPS filed to recover $88 million of Winter Storm Uri costs over 24 months, as part of the Texas fuel surcharge filing, with total under-recovered costs of $121 million. In April 2022, interim rates designed to recover $121 million over 30 months were approved, subject to PUCT approval through the triennial Fuel Reconciliation proceeding. In July 2022, the intervenors filed recommendations. The Texas Industrial Energy Consumers and PUCT staff recommended disallowances of approximately $10 million (off-system sales margins). The Office of Public Utility Counsel recommended disallowances of approximately $15 million (off-system sales margins and adjustment to energy loss factors). The Alliance of Xcel Municipalities recommended disallowances of approximately $100 million (natural gas storage, contracted capability and off-system sales margins). In November 2022, the ALJs found that costs were prudently incurred and recommended no disallowances. A final PUCT decision is anticipated in the first quarter of 2023. | ||||||
Critical Accounting Policies and Estimates | ||
| Pension Costs | ||||||||||||||
| (Millions of Dollars) | +1% | -1% | ||||||||||||
Rate of return (a) | $ | (11) | $ | 26 | ||||||||||
Discount rate (a) | $ | 1 | $ | 8 | ||||||||||
Derivatives, Risk Management and Market Risk | ||
| Futures / Forwards Maturity | ||||||||||||||||||||||||||||||||
| (Millions of Dollars) | Less Than 1 Year | 1 to 3 Years | 4 to 5 Years | Greater Than 5 Years | Total Fair Value | |||||||||||||||||||||||||||
NSP-Minnesota (a) | $ | (8) | $ | (6) | $ | (7) | $ | (2) | $ | (23) | ||||||||||||||||||||||
NSP-Minnesota (b) | 5 | (4) | — | (3) | (2) | |||||||||||||||||||||||||||
PSCo (a) | 10 | 3 | 3 | — | 16 | |||||||||||||||||||||||||||
PSCo (b) | (56) | (15) | 8 | — | (63) | |||||||||||||||||||||||||||
| $ | (49) | $ | (22) | $ | 4 | $ | (5) | $ | (72) | |||||||||||||||||||||||
| Options Maturity | ||||||||||||||||||||||||||||||||
| (Millions of Dollars) | Less Than 1 Year | 1 to 3 Years | 4 to 5 Years | Greater Than 5 Years | Total Fair Value | |||||||||||||||||||||||||||
NSP-Minnesota (b) | $ | — | $ | — | $ | — | $ | 15 | $ | 15 | ||||||||||||||||||||||
PSCo (b) | 40 | 7 | — | — | 47 | |||||||||||||||||||||||||||
| $ | 40 | $ | 7 | $ | — | $ | 15 | $ | 62 | |||||||||||||||||||||||
| (Millions of Dollars) | 2022 | 2021 | ||||||||||||
| Fair value of commodity trading net contracts outstanding at Jan. 1 | $ | (33) | $ | (54) | ||||||||||
| Contracts realized or settled during the period | (15) | (54) | ||||||||||||
| Commodity trading contract additions and changes during the period | 38 | 75 | ||||||||||||
| Fair value of commodity trading net contracts outstanding at Dec. 31 | $ | (10) | $ | (33) | ||||||||||
| (Millions of Dollars) | Year Ended Dec. 31 | Average | High | Low | ||||||||||||||||||||||
| 2022 | $ | 2 | $ | 1 | $ | 5 | $ | — | ||||||||||||||||||
| 2021 | $ | 1 | $ | 2 | $ | 52 | $ | 1 | ||||||||||||||||||
Liquidity and Capital Resources | ||
| (Millions of Dollars) | Twelve Months Ended Dec. 31 | |||||||
| Cash provided by operating activities — 2021 | $ | 2,189 | ||||||
| Components of change — 2022 vs. 2021 | ||||||||
| Higher net income | 139 | |||||||
| Non-cash transactions | 257 | |||||||
| Changes in working capital | (300) | |||||||
| Changes in net regulatory and other assets and liabilities | 1,647 | |||||||
| Cash provided by operating activities — 2022 | $ | 3,932 | ||||||
| (Millions of Dollars) | Twelve Months Ended Dec. 31 | |||||||
| Cash used in investing activities — 2021 | $ | (4,287) | ||||||
| Components of change — 2022 vs. 2021 | ||||||||
| Increased capital expenditures | (394) | |||||||
| Other investing activities | 28 | |||||||
| Cash used in investing activities — 2022 | $ | (4,653) | ||||||
| (Millions of Dollars) | Twelve Months Ended Dec. 31 | |||||||
| Cash provided by financing activities — 2021 | $ | 2,135 | ||||||
| Components of change — 2022 vs. 2021 | ||||||||
| Lower debt issuances | (1,159) | |||||||
| Higher repayments of long-term debt | (184) | |||||||
| Lower proceeds from issuance of common stock | (44) | |||||||
| Higher dividends paid to shareholders | (77) | |||||||
| Other financing activities | (5) | |||||||
| Cash provided by financing activities — 2022 | $ | 666 | ||||||
| Payments Due by Period (as of Dec. 31, 2022) | ||||||||||||||||||||||||||||||||
| (Millions of Dollars) | Total | Less than 1 Year | 1 to 3 Years | 3 to 5 Years | After 5 Years | |||||||||||||||||||||||||||
| Long-term debt, principal and interest payments | $ | 39,750 | $ | 2,059 | $ | 3,492 | $ | 2,714 | $ | 31,485 | ||||||||||||||||||||||
| Finance lease obligations | 228 | 10 | 20 | 17 | 181 | |||||||||||||||||||||||||||
Operating leases obligations (a) | 1,457 | 264 | 506 | 287 | 400 | |||||||||||||||||||||||||||
Unconditional purchase obligations (b) | 5,129 | 1,899 | 1,475 | 921 | 834 | |||||||||||||||||||||||||||
Other long-term obligations, including current portion (c) | 111 | 53 | 35 | 23 | — | |||||||||||||||||||||||||||
| Other short-term obligations | 436 | 436 | — | — | — | |||||||||||||||||||||||||||
| Short-term debt | 813 | 813 | — | — | — | |||||||||||||||||||||||||||
| Total contractual cash obligations | $ | 47,924 | $ | 5,534 | $ | 5,528 | $ | 3,962 | $ | 32,900 | ||||||||||||||||||||||
| Actual | Base Capital Forecast (Millions of Dollars) | |||||||||||||||||||||||||||||||||||||||||||
| By Regulated Utility | 2022 | 2023 | 2024 | 2025 | 2026 | 2027 | 2023 - 2027 Total | |||||||||||||||||||||||||||||||||||||
| PSCo | $ | 1,940 | $ | 2,140 | $ | 2,440 | $ | 2,550 | $ | 1,980 | $ | 2,190 | $ | 11,300 | ||||||||||||||||||||||||||||||
| NSP-Minnesota | 1,980 | 2,000 | 2,400 | 2,530 | 2,200 | 2,580 | 11,710 | |||||||||||||||||||||||||||||||||||||
| SPS | 610 | 710 | 780 | 720 | 770 | 900 | 3,880 | |||||||||||||||||||||||||||||||||||||
| NSP-Wisconsin | 370 | 540 | 570 | 500 | 450 | 540 | 2,600 | |||||||||||||||||||||||||||||||||||||
Other (a) | (10) | 10 | 10 | (30) | 10 | 10 | 10 | |||||||||||||||||||||||||||||||||||||
| Total base capital expenditures | $ | 4,890 | $ | 5,400 | $ | 6,200 | $ | 6,270 | $ | 5,410 | $ | 6,220 | $ | 29,500 | ||||||||||||||||||||||||||||||
| Actual | Base Capital Forecast (Millions of Dollars) | |||||||||||||||||||||||||||||||||||||||||||
| By Function | 2022 | 2023 | 2024 | 2025 | 2026 | 2027 | 2023 - 2027 Total | |||||||||||||||||||||||||||||||||||||
| Electric distribution | $ | 1,370 | $ | 1,610 | $ | 1,790 | $ | 1,680 | $ | 2,000 | $ | 2,450 | $ | 9,530 | ||||||||||||||||||||||||||||||
| Electric transmission | 960 | 1,280 | 1,650 | 1,890 | 1,690 | 1,900 | 8,410 | |||||||||||||||||||||||||||||||||||||
| Electric generation | 720 | 710 | 910 | 900 | 560 | 650 | 3,730 | |||||||||||||||||||||||||||||||||||||
| Natural gas | 730 | 740 | 730 | 760 | 650 | 680 | 3,560 | |||||||||||||||||||||||||||||||||||||
| Other | 700 | 780 | 840 | 570 | 510 | 540 | 3,240 | |||||||||||||||||||||||||||||||||||||
| Renewables | 410 | 280 | 280 | 470 | — | — | 1,030 | |||||||||||||||||||||||||||||||||||||
| Total base capital expenditures | $ | 4,890 | $ | 5,400 | $ | 6,200 | $ | 6,270 | $ | 5,410 | $ | 6,220 | $ | 29,500 | ||||||||||||||||||||||||||||||
| (Millions of Dollars) | ||||||||
| Funding Capital Expenditures | ||||||||
Cash from operations (a) | $ | 20,540 | ||||||
New debt (b) | 8,210 | |||||||
| Equity through the DRIP and benefit program | 425 | |||||||
| Other equity | 325 | |||||||
| Base capital expenditures 2023 - 2027 | $ | 29,500 | ||||||
| Maturing Debt | $ | 3,800 | ||||||
| (Millions of Dollars) | Dec. 31, 2022 | Dec. 31, 2021 | ||||||||||||
| Fair value of pension assets | $ | 2,685 | $ | 3,670 | ||||||||||
Projected pension obligation (a) | 2,871 | 3,718 | ||||||||||||
| Funded status | $ | (186) | $ | (48) | ||||||||||
| Pension Assumptions | 2022 | 2021 | ||||||||||||
| Discount rate | 5.80 | % | 3.08 | % | ||||||||||
| Expected long-term rate of return | 6.93 | 6.49 | ||||||||||||
| (Millions of Dollars) | Facility (a) | Drawn (b) | Available | Cash | Liquidity | |||||||||||||||||||||||||||
| Xcel Energy Inc. | $ | 1,500 | $ | 328 | $ | 1,172 | $ | 6 | $ | 1,178 | ||||||||||||||||||||||
| PSCo | 700 | 123 | 577 | 5 | 582 | |||||||||||||||||||||||||||
| NSP-Minnesota | 700 | 186 | 514 | 6 | 520 | |||||||||||||||||||||||||||
| SPS | 500 | 91 | 409 | 2 | 411 | |||||||||||||||||||||||||||
| NSP-Wisconsin | 150 | 29 | 121 | 2 | 123 | |||||||||||||||||||||||||||
| Total | $ | 3,550 | $ | 757 | $ | 2,793 | $ | 21 | $ | 2,814 | ||||||||||||||||||||||
| (Millions of Dollars) | Security | Amount | Anticipated Timing | |||||||||||||||||
| Xcel Energy Inc. | Senior Unsecured Bonds | $ | 500 | Third Quarter | ||||||||||||||||
| PSCo | First Mortgage Bonds | 700 | Second Quarter | |||||||||||||||||
| SPS | First Mortgage Bonds | 100 | Third Quarter | |||||||||||||||||
| NSP-Minnesota | First Mortgage Bonds | 750 | Second Quarter | |||||||||||||||||
| NSP-Wisconsin | First Mortgage Bonds | 125 | Second Quarter | |||||||||||||||||
ITEM 7A — QUANTITATIVE AND QUALITATIVE DISCLOSURES ABOUT MARKET RISK | ||
ITEM 8 — FINANCIAL STATEMENTS AND SUPPLEMENTARY DATA | ||
| /s/ ROBERT C. FRENZEL | /s/ BRIAN J. VAN ABEL | |||||||||||||
| Robert C. Frenzel | Brian J. Van Abel | |||||||||||||
| Chairman, President, Chief Executive Officer and Director | Executive Vice President, Chief Financial Officer | |||||||||||||
| Feb. 23, 2023 | Feb. 23, 2023 | |||||||||||||
/s/ | ||
| February 23, 2023 | ||
| We have served as the Company’s auditor since 2002. | ||
| Year Ended Dec. 31 | ||||||||||||||||||||
| 2022 | 2021 | 2020 | ||||||||||||||||||
| Operating revenues | ||||||||||||||||||||
| Electric | $ | $ | $ | |||||||||||||||||
| Natural gas | ||||||||||||||||||||
| Other | ||||||||||||||||||||
| Total operating revenues | ||||||||||||||||||||
| Operating expenses | ||||||||||||||||||||
| Electric fuel and purchased power | ||||||||||||||||||||
| Cost of natural gas sold and transported | ||||||||||||||||||||
| Cost of sales — other | ||||||||||||||||||||
| Operating and maintenance expenses | ||||||||||||||||||||
| Conservation and demand side management expenses | ||||||||||||||||||||
| Depreciation and amortization | ||||||||||||||||||||
| Taxes (other than income taxes) | ||||||||||||||||||||
| Total operating expenses | ||||||||||||||||||||
| Operating income | ||||||||||||||||||||
| Other (expense) income, net | ( | ( | ||||||||||||||||||
| Earnings from equity method investments | ||||||||||||||||||||
| Allowance for funds used during construction — equity | ||||||||||||||||||||
| Interest charges and financing costs | ||||||||||||||||||||
Interest charges — includes other financing costs of $ | ||||||||||||||||||||
| Allowance for funds used during construction — debt | ( | ( | ( | |||||||||||||||||
| Total interest charges and financing costs | ||||||||||||||||||||
| Income before income taxes | ||||||||||||||||||||
| Income tax benefit | ( | ( | ( | |||||||||||||||||
| Net income | $ | $ | $ | |||||||||||||||||
| Weighted average common shares outstanding: | ||||||||||||||||||||
| Basic | ||||||||||||||||||||
| Diluted | ||||||||||||||||||||
| Earnings per average common share: | ||||||||||||||||||||
| Basic | $ | $ | $ | |||||||||||||||||
| Diluted | ||||||||||||||||||||
| See Notes to Consolidated Financial Statements | ||||||||||||||||||||
| Year Ended Dec. 31 | ||||||||||||||||||||
| 2022 | 2021 | 2020 | ||||||||||||||||||
| Net income | $ | $ | $ | |||||||||||||||||
| Other comprehensive income | ||||||||||||||||||||
| Pension and retiree medical benefits: | ||||||||||||||||||||
Net pension and retiree medical gains (losses) arising during the period, net of tax of $ | ( | |||||||||||||||||||
Reclassification of losses to net income, net of tax of $ | ||||||||||||||||||||
| Derivative instruments: | ||||||||||||||||||||
Net fair value increase (decrease), net of tax of $ | ( | |||||||||||||||||||
Reclassification of losses to net income, net of tax of $ | ||||||||||||||||||||
| Total other comprehensive income | ||||||||||||||||||||
| Total comprehensive income | $ | $ | $ | |||||||||||||||||
| See Notes to Consolidated Financial Statements | ||||||||||||||||||||
| Year Ended Dec. 31 | |||||||||||||||||
| 2022 | 2021 | 2020 | |||||||||||||||
| Operating activities | |||||||||||||||||
| Net income | $ | $ | $ | ||||||||||||||
| Adjustments to reconcile net income to cash provided by operating activities: | |||||||||||||||||
| Depreciation and amortization | |||||||||||||||||
| Nuclear fuel amortization | |||||||||||||||||
| Deferred income taxes | ( | ( | ( | ||||||||||||||
| Allowance for equity funds used during construction | ( | ( | ( | ||||||||||||||
| Earnings from equity method investments | ( | ( | ( | ||||||||||||||
| Dividends from equity method investments | |||||||||||||||||
| Provision for bad debts | |||||||||||||||||
| Share-based compensation expense | |||||||||||||||||
| Changes in operating assets and liabilities: | |||||||||||||||||
| Accounts receivable | ( | ( | ( | ||||||||||||||
| Accrued unbilled revenues | ( | ( | ( | ||||||||||||||
| Inventories | ( | ( | ( | ||||||||||||||
| Other current assets | ( | ( | ( | ||||||||||||||
| Accounts payable | ( | ||||||||||||||||
| Net regulatory assets and liabilities | ( | ( | |||||||||||||||
| Other current liabilities | ( | ||||||||||||||||
| Pension and other employee benefit obligations | ( | ( | ( | ||||||||||||||
| Other, net | ( | ( | ( | ||||||||||||||
| Net cash provided by operating activities | |||||||||||||||||
| Investing activities | |||||||||||||||||
| Capital/construction expenditures | ( | ( | ( | ||||||||||||||
| Sale of MEC | |||||||||||||||||
| Purchase of investment securities | ( | ( | ( | ||||||||||||||
| Proceeds from the sale of investment securities | |||||||||||||||||
| Other, net | ( | ( | |||||||||||||||
| Net cash used in investing activities | ( | ( | ( | ||||||||||||||
| Financing activities | |||||||||||||||||
| (Repayments of) proceeds from short-term borrowings, net | ( | ( | |||||||||||||||
| Proceeds from issuances of long-term debt | |||||||||||||||||
| Repayments of long-term debt | ( | ( | ( | ||||||||||||||
| Proceeds from issuance of common stock | |||||||||||||||||
| Dividends paid | ( | ( | ( | ||||||||||||||
| Other, net | ( | ( | ( | ||||||||||||||
| Net cash provided by financing activities | |||||||||||||||||
| Net change in cash and cash equivalents | ( | ( | |||||||||||||||
| Cash, cash equivalents and restricted cash at beginning of period | |||||||||||||||||
| Cash, cash equivalents and restricted cash at end of period | $ | $ | $ | ||||||||||||||
| Supplemental disclosure of cash flow information: | |||||||||||||||||
| Cash paid for interest (net of amounts capitalized) | $ | ( | $ | ( | $ | ( | |||||||||||
| Cash (paid) received for income taxes, net | ( | ( | |||||||||||||||
| Supplemental disclosure of non-cash investing and financing transactions: | |||||||||||||||||
| Accrued property, plant and equipment additions | $ | $ | $ | ||||||||||||||
| Inventory transfers to property, plant and equipment | |||||||||||||||||
| Operating lease right-of-use assets | |||||||||||||||||
| Allowance for equity funds used during construction | |||||||||||||||||
| Issuance of common stock for reinvested dividends and/or equity awards | |||||||||||||||||
| See Notes to Consolidated Financial Statements | |||||||||||||||||
| Dec. 31 | ||||||||||||||
| 2022 | 2021 | |||||||||||||
| Assets | ||||||||||||||
| Current assets | ||||||||||||||
| Cash and cash equivalents | $ | $ | ||||||||||||
| Accounts receivable, net | ||||||||||||||
| Accrued unbilled revenues | ||||||||||||||
| Inventories | ||||||||||||||
| Regulatory assets | ||||||||||||||
| Derivative instruments | ||||||||||||||
| Prepaid taxes | ||||||||||||||
| Prepayments and other | ||||||||||||||
| Total current assets | ||||||||||||||
| Property, plant and equipment, net | ||||||||||||||
| Other assets | ||||||||||||||
| Nuclear decommissioning fund and other investments | ||||||||||||||
| Regulatory assets | ||||||||||||||
| Derivative instruments | ||||||||||||||
| Operating lease right-of-use assets | ||||||||||||||
| Other | ||||||||||||||
| Total other assets | ||||||||||||||
| Total assets | $ | $ | ||||||||||||
| Liabilities and Equity | ||||||||||||||
| Current liabilities | ||||||||||||||
| Current portion of long-term debt | $ | $ | ||||||||||||
| Short-term debt | ||||||||||||||
| Accounts payable | ||||||||||||||
| Regulatory liabilities | ||||||||||||||
| Taxes accrued | ||||||||||||||
| Accrued interest | ||||||||||||||
| Dividends payable | ||||||||||||||
| Derivative instruments | ||||||||||||||
| Operating lease liabilities | ||||||||||||||
| Other | ||||||||||||||
| Total current liabilities | ||||||||||||||
| Deferred credits and other liabilities | ||||||||||||||
| Deferred income taxes | ||||||||||||||
| Deferred investment tax credits | ||||||||||||||
| Regulatory liabilities | ||||||||||||||
| Asset retirement obligations | ||||||||||||||
| Derivative instruments | ||||||||||||||
| Customer advances | ||||||||||||||
| Pension and employee benefit obligations | ||||||||||||||
| Operating lease liabilities | ||||||||||||||
| Other | ||||||||||||||
| Total deferred credits and other liabilities | ||||||||||||||
| Commitments and contingencies | ||||||||||||||
| Capitalization | ||||||||||||||
| Long-term debt | ||||||||||||||
Common stock — | ||||||||||||||
| Additional paid in capital | ||||||||||||||
| Retained earnings | ||||||||||||||
| Accumulated other comprehensive loss | ( | ( | ||||||||||||
| Total common stockholders’ equity | ||||||||||||||
| Total liabilities and equity | $ | $ | ||||||||||||
| See Notes to Consolidated Financial Statements | ||||||||||||||
| Common Stock Issued | Retained Earnings | Accumulated Other Comprehensive Loss | Total Common Stockholders’ Equity | ||||||||||||||||||||||||||||||||
| Shares | Par Value | Additional Paid In Capital | |||||||||||||||||||||||||||||||||
| Balance at Dec. 31, 2019 | $ | $ | $ | $ | ( | $ | |||||||||||||||||||||||||||||
| Net income | |||||||||||||||||||||||||||||||||||
Dividends declared on common stock ($ | ( | ( | |||||||||||||||||||||||||||||||||
| Issuances of common stock | |||||||||||||||||||||||||||||||||||
| Repurchases of common stock | ( | ( | ( | ||||||||||||||||||||||||||||||||
| Share-based compensation | ( | ||||||||||||||||||||||||||||||||||
| Adoption of ASC Topic 326 | ( | ( | |||||||||||||||||||||||||||||||||
| Balance at Dec. 31, 2020 | $ | $ | $ | $ | ( | $ | |||||||||||||||||||||||||||||
| Net Income | |||||||||||||||||||||||||||||||||||
| Other comprehensive loss | |||||||||||||||||||||||||||||||||||
Dividends declared on common stock ($ | ( | ( | |||||||||||||||||||||||||||||||||
| Issuances of common stock | |||||||||||||||||||||||||||||||||||
| Share-based compensation | ( | ||||||||||||||||||||||||||||||||||
| Balance at Dec. 31, 2021 | $ | $ | $ | $ | ( | $ | |||||||||||||||||||||||||||||
| Net income | |||||||||||||||||||||||||||||||||||
| Other comprehensive income | |||||||||||||||||||||||||||||||||||
Dividends declared on common stock ($ | ( | ( | |||||||||||||||||||||||||||||||||
| Issuances of common stock | |||||||||||||||||||||||||||||||||||
| Share-based compensation | ( | ||||||||||||||||||||||||||||||||||
| Balance at Dec. 31, 2022 | $ | $ | $ | $ | ( | $ | |||||||||||||||||||||||||||||
| See Notes to Consolidated Financial Statements | |||||||||||||||||||||||||||||||||||
1. Summary of Significant Accounting Policies | ||
| Nonregulated Subsidiary | Purpose | |||||||
| Eloigne | Invests in rental housing projects that qualify for low-income housing tax credits. | |||||||
| Capital Services | Procures equipment for construction of renewable generation facilities at other subsidiaries. | |||||||
| Venture Holdings | Invests in limited partnerships, including EIP funds with portfolios of investments in energy technology companies. | |||||||
| Nicollet Project Holdings | Invests in nonregulated assets such as the Minnesota community solar gardens. | |||||||
| Direct Subsidiary | ||
| Xcel Energy Wholesale Group Inc. | ||
| Xcel Energy Market Holdings Inc. | ||
| Xcel Energy Ventures Inc. | ||
| Xcel Energy Retail Holdings Inc. | ||
| Xcel Energy Communication Group, Inc. | ||
| Xcel Energy International Inc. | ||
| Xcel Energy Transmission Holding Company, LLC | ||
| Nicollet Holdings Company, LLC | ||
| Xcel Energy Nuclear Services Holdings, LLC | ||
| Xcel Energy Services Inc. | ||
| (Millions of Dollars) | Dec. 31, 2022 | Dec. 31, 2021 | ||||||||||||
| Inventories | ||||||||||||||
| Materials and supplies | $ | $ | ||||||||||||
| Fuel | ||||||||||||||
| Natural gas | ||||||||||||||
| Total inventories | $ | $ | ||||||||||||
2. Accounting Pronouncements | ||
3. Property, Plant and Equipment | ||
| (Millions of Dollars) | Dec. 31, 2022 | Dec. 31, 2021 | ||||||||||||
| Property, plant and equipment, net | ||||||||||||||
| Electric plant | $ | $ | ||||||||||||
| Natural gas plant | ||||||||||||||
| Common and other property | ||||||||||||||
Plant to be retired (a) | ||||||||||||||
| CWIP | ||||||||||||||
| Total property, plant and equipment | ||||||||||||||
| Less accumulated depreciation | ( | ( | ||||||||||||
| Nuclear fuel | ||||||||||||||
| Less accumulated amortization | ( | ( | ||||||||||||
| Property, plant and equipment, net | $ | $ | ||||||||||||
| (Millions of Dollars, Except Percent Owned) | Plant in Service | Accumulated Depreciation | Percent Owned | |||||||||||||||||
| NSP-Minnesota | ||||||||||||||||||||
| Electric generation: | ||||||||||||||||||||
| Sherco Unit 3 | $ | $ | % | |||||||||||||||||
| Sherco common facilities | ||||||||||||||||||||
| Sherco substation | ||||||||||||||||||||
| Electric transmission: | ||||||||||||||||||||
| Grand Meadow | ||||||||||||||||||||
| Huntley Wilmarth | ||||||||||||||||||||
| CapX2020 | ||||||||||||||||||||
Total NSP-Minnesota (a) | $ | $ | ||||||||||||||||||
| (Millions of Dollars, Except Percent Owned) | Plant in Service | Accumulated Depreciation | Percent Owned | |||||||||||||||||
| NSP-Wisconsin | ||||||||||||||||||||
| Electric transmission: | ||||||||||||||||||||
| La Crosse, WI to Madison, WI | $ | $ | % | |||||||||||||||||
| CapX2020 | ||||||||||||||||||||
Total NSP-Wisconsin (a) | $ | $ | ||||||||||||||||||
| (Millions of Dollars, Except Percent Owned) | Plant in Service | Accumulated Depreciation | Percent Owned | |||||||||||||||||
| PSCo | ||||||||||||||||||||
| Electric generation: | ||||||||||||||||||||
| Hayden Unit 1 | $ | $ | % | |||||||||||||||||
| Hayden Unit 2 | ||||||||||||||||||||
| Hayden common facilities | ||||||||||||||||||||
| Craig Units 1 and 2 | ||||||||||||||||||||
| Craig common facilities | ||||||||||||||||||||
| Comanche Unit 3 | ||||||||||||||||||||
| Comanche common facilities | ||||||||||||||||||||
| Electric transmission: | ||||||||||||||||||||
| Transmission and other facilities | Various | |||||||||||||||||||
| Gas transmission: | ||||||||||||||||||||
| Rifle, CO to Avon, CO | ||||||||||||||||||||
| Gas transmission compressor | ||||||||||||||||||||
Total PSCo (a) | $ | $ | ||||||||||||||||||
4. Regulatory Assets and Liabilities | ||
| (Millions of Dollars) | See Note(s) | Remaining Amortization Period | Dec. 31, 2022 | Dec. 31, 2021 (a) | ||||||||||||||||||||||||||||||||||
| Regulatory Assets | Current | Noncurrent | Current | Noncurrent | ||||||||||||||||||||||||||||||||||
| Pension and retiree medical obligations | 11 | Various | $ | $ | $ | $ | ||||||||||||||||||||||||||||||||
Net AROs (b) | 1, 12 | Various | ( | |||||||||||||||||||||||||||||||||||
| Deferred natural gas, electric, steam energy/fuel costs | to years | |||||||||||||||||||||||||||||||||||||
| Recoverable deferred taxes on AFUDC | Plant lives | |||||||||||||||||||||||||||||||||||||
Excess deferred taxes — TCJA | 7 | Various | ||||||||||||||||||||||||||||||||||||
| Depreciation differences | to | |||||||||||||||||||||||||||||||||||||
| Environmental remediation costs | 1, 12 | Various | ||||||||||||||||||||||||||||||||||||
| Benson biomass PPA termination and asset purchase | years | |||||||||||||||||||||||||||||||||||||
| PI extended power uprate | ||||||||||||||||||||||||||||||||||||||
Conservation programs (c) | 1 | to years | ||||||||||||||||||||||||||||||||||||
| Purchased power contract costs | Term of related contract | |||||||||||||||||||||||||||||||||||||
| State commission adjustments | Plant lives | |||||||||||||||||||||||||||||||||||||
| Losses on reacquired debt | Term of related debt | |||||||||||||||||||||||||||||||||||||
Contract valuation adjustments (d) | 1, 10 | Term of related contract | ||||||||||||||||||||||||||||||||||||
| Grid modernization costs | Various | |||||||||||||||||||||||||||||||||||||
| Gas pipeline inspection and remediation costs | to years | |||||||||||||||||||||||||||||||||||||
| Nuclear refueling outage costs | 1 | to years | ||||||||||||||||||||||||||||||||||||
| Renewable resources and environmental initiatives | to years | |||||||||||||||||||||||||||||||||||||
| Texas revenue surcharges | Less than year | |||||||||||||||||||||||||||||||||||||
| Sales true-up and revenue decoupling | to years | |||||||||||||||||||||||||||||||||||||
| Other | Various | |||||||||||||||||||||||||||||||||||||
| Total regulatory assets | $ | $ | $ | $ | ||||||||||||||||||||||||||||||||||
| (Millions of Dollars) | See Note(s) | Remaining Amortization Period | Dec. 31, 2022 | Dec. 31, 2021 (a) | ||||||||||||||||||||||||||||||||||
| Regulatory Liabilities | Current | Noncurrent | Current | Noncurrent | ||||||||||||||||||||||||||||||||||
Deferred income tax adjustments and TCJA refunds (b) | 7 | Various | $ | $ | $ | $ | ||||||||||||||||||||||||||||||||
| Plant removal costs | 1, 12 | Various | ||||||||||||||||||||||||||||||||||||
Effects of regulation on employee benefit costs (c) | Various | |||||||||||||||||||||||||||||||||||||
| Renewable resources and environmental initiatives | Various | |||||||||||||||||||||||||||||||||||||
| Revenue decoupling | to years | |||||||||||||||||||||||||||||||||||||
ITC deferrals | 1 | Various | ||||||||||||||||||||||||||||||||||||
| Formula rates | to years | |||||||||||||||||||||||||||||||||||||
Contract valuation adjustments (d) | 1, 10 | to years | ||||||||||||||||||||||||||||||||||||
| Deferred natural gas, electric, steam energy/fuel costs | Less than year | |||||||||||||||||||||||||||||||||||||
Conservation programs (e) | 1 | Less than year | ||||||||||||||||||||||||||||||||||||
| DOE settlement | Various | |||||||||||||||||||||||||||||||||||||
| Other | Various | |||||||||||||||||||||||||||||||||||||
Total regulatory liabilities (f) | $ | $ | $ | $ | ||||||||||||||||||||||||||||||||||
5. Borrowings and Other Financing Instruments | ||
| (Millions of Dollars, Except Interest Rates) | Three Months Ended Dec. 31, 2022 | Year Ended Dec. 31 | ||||||||||||||||||||||||
| 2022 | 2021 | 2020 | ||||||||||||||||||||||||
| Borrowing limit | $ | $ | $ | $ | ||||||||||||||||||||||
| Amount outstanding at period end | ||||||||||||||||||||||||||
| Average amount outstanding | ||||||||||||||||||||||||||
| Maximum amount outstanding | ||||||||||||||||||||||||||
| Weighted average interest rate, computed on a daily basis | % | % | % | % | ||||||||||||||||||||||
| Weighted average interest rate at period end | ||||||||||||||||||||||||||
Debt-to-Total Capitalization Ratio (a) | Amount Facility May Be Increased (millions of dollars) | Additional Periods for Which a One-Year Extension May Be Requested (b) | ||||||||||||||||||||||||
| 2022 | 2021 | |||||||||||||||||||||||||
Xcel Energy Inc. (c) | % | % | $ | |||||||||||||||||||||||
| NSP-Minnesota | ||||||||||||||||||||||||||
| NSP-Wisconsin | N/A | |||||||||||||||||||||||||
| SPS | ||||||||||||||||||||||||||
| PSCo | ||||||||||||||||||||||||||
| (Millions of Dollars) | Credit Facility (a) | Drawn (b) | Available | |||||||||||||||||
| Xcel Energy Inc. | $ | $ | $ | |||||||||||||||||
| PSCo | ||||||||||||||||||||
| NSP-Minnesota | ||||||||||||||||||||
| SPS | ||||||||||||||||||||
| NSP-Wisconsin | ||||||||||||||||||||
| Total | $ | $ | $ | |||||||||||||||||
| Xcel Energy Inc. | ||||||||||||||||||||||||||
| Financing Instrument | Interest Rate | Maturity Date | 2022 | 2021 | ||||||||||||||||||||||
| Unsecured senior notes | Oct. 15, 2023 | |||||||||||||||||||||||||
| Unsecured senior notes | June 1, 2025 | |||||||||||||||||||||||||
| Unsecured senior notes | June 1, 2025 | |||||||||||||||||||||||||
| Unsecured senior notes | Dec. 1, 2026 | |||||||||||||||||||||||||
Unsecured senior notes (a) | March 15,2027 | |||||||||||||||||||||||||
| Unsecured senior notes | June 15, 2028 | |||||||||||||||||||||||||
| Unsecured senior notes | June 15, 2028 | |||||||||||||||||||||||||
| Unsecured senior notes | Dec. 1, 2029 | |||||||||||||||||||||||||
| Unsecured senior notes | June 1, 2030 | |||||||||||||||||||||||||
Unsecured senior notes (a) | Nov. 15, 2031 | |||||||||||||||||||||||||
Unsecured senior notes (b) | June 1, 2032 | |||||||||||||||||||||||||
| Unsecured senior notes | July 1, 2036 | |||||||||||||||||||||||||
| Unsecured senior notes | Sep. 15, 2041 | |||||||||||||||||||||||||
| Unsecured senior notes | Dec. 1, 2049 | |||||||||||||||||||||||||
| Unamortized discount | ( | ( | ||||||||||||||||||||||||
| Unamortized debt issuance cost | ( | ( | ||||||||||||||||||||||||
| Current maturities | ( | |||||||||||||||||||||||||
| Total long-term debt | $ | $ | ||||||||||||||||||||||||
| NSP-Minnesota | ||||||||||||||||||||||||||
| Financing Instrument | Interest Rate | Maturity Date | 2022 | 2021 | ||||||||||||||||||||||
| First mortgage bonds | % | Aug. 15, 2022 | $ | $ | ||||||||||||||||||||||
| First mortgage bonds | May 15, 2023 | |||||||||||||||||||||||||
| First mortgage bonds | July 1, 2025 | |||||||||||||||||||||||||
| First mortgage bonds | March 1, 2028 | |||||||||||||||||||||||||
First mortgage bonds (a) | April 1, 2031 | |||||||||||||||||||||||||
| First mortgage bonds | July 15, 2035 | |||||||||||||||||||||||||
| First mortgage bonds | June 1, 2036 | |||||||||||||||||||||||||
| First mortgage bonds | July 1, 2037 | |||||||||||||||||||||||||
| First mortgage bonds | Nov. 1, 2039 | |||||||||||||||||||||||||
| First mortgage bonds | Aug. 15, 2040 | |||||||||||||||||||||||||
| First mortgage bonds | Aug. 15, 2042 | |||||||||||||||||||||||||
| First mortgage bonds | May 15, 2044 | |||||||||||||||||||||||||
| First mortgage bonds | Aug. 15, 2045 | |||||||||||||||||||||||||
| First mortgage bonds | May 15, 2046 | |||||||||||||||||||||||||
| First mortgage bonds | Sep. 15, 2047 | |||||||||||||||||||||||||
| First mortgage bonds | March 1, 2050 | |||||||||||||||||||||||||
| First mortgage bonds | June 1, 2051 | |||||||||||||||||||||||||
First mortgage bonds (a) | April 1,2052 | |||||||||||||||||||||||||
First mortgage bonds (b) | June 1, 2052 | |||||||||||||||||||||||||
| Other long-term debt | ||||||||||||||||||||||||||
| Unamortized discount | ( | ( | ||||||||||||||||||||||||
| Unamortized debt issuance cost | ( | ( | ||||||||||||||||||||||||
| Current maturities | ( | ( | ||||||||||||||||||||||||
| Total long-term debt | $ | $ | ||||||||||||||||||||||||
| NSP-Wisconsin | ||||||||||||||||||||||||||
| Financing Instrument | Interest Rate | Maturity Date | 2022 | 2021 | ||||||||||||||||||||||
| First mortgage bonds | June 15, 2024 | |||||||||||||||||||||||||
| First mortgage bonds | June 15, 2024 | |||||||||||||||||||||||||
| First mortgage bonds | Sept. 1, 2038 | |||||||||||||||||||||||||
| First mortgage bonds | Oct. 1, 2042 | |||||||||||||||||||||||||
| First mortgage bonds | Dec. 1, 2047 | |||||||||||||||||||||||||
| First mortgage bonds | Sept. 1, 2048 | |||||||||||||||||||||||||
| First mortgage bonds | May 1, 2051 | |||||||||||||||||||||||||
First mortgage bonds (a) | May 1, 2051 | |||||||||||||||||||||||||
First mortgage bonds (b) | Sept. 15, 2052 | |||||||||||||||||||||||||
| Other long-term debt | ||||||||||||||||||||||||||
| Unamortized discount | ( | ( | ||||||||||||||||||||||||
| Unamortized debt issuance cost | ( | ( | ||||||||||||||||||||||||
| Total long-term debt | $ | $ | ||||||||||||||||||||||||
| PSCo | ||||||||||||||||||||||||||
| Financing Instrument | Interest Rate | Maturity Date | 2022 | 2021 | ||||||||||||||||||||||
| First mortgage bonds | % | Sept. 15, 2022 | $ | $ | ||||||||||||||||||||||
| First mortgage bonds | March 15, 2023 | |||||||||||||||||||||||||
| First mortgage bonds | May 15, 2025 | |||||||||||||||||||||||||
| First mortgage bonds | June 15, 2028 | |||||||||||||||||||||||||
| First mortgage bonds | Jan. 15, 2031 | |||||||||||||||||||||||||
First mortgage bonds (a) | June 15, 2031 | |||||||||||||||||||||||||
First mortgage bonds (b) | June 1, 2032 | |||||||||||||||||||||||||
| First mortgage bonds | Sept. 1, 2037 | |||||||||||||||||||||||||
| First mortgage bonds | Aug. 1, 2038 | |||||||||||||||||||||||||
| First mortgage bonds | Aug. 15, 2041 | |||||||||||||||||||||||||
| First mortgage bonds | Sept. 15, 2042 | |||||||||||||||||||||||||
| First mortgage bonds | March 15, 2043 | |||||||||||||||||||||||||
| First mortgage bonds | March 15, 2044 | |||||||||||||||||||||||||
| First mortgage bonds | June 15, 2046 | |||||||||||||||||||||||||
| First mortgage bonds | June 15, 2047 | |||||||||||||||||||||||||
| First mortgage bonds | June 15, 2048 | |||||||||||||||||||||||||
| First mortgage bonds | Sept. 15, 2049 | |||||||||||||||||||||||||
| First mortgage bonds | March 1, 2050 | |||||||||||||||||||||||||
| First mortgage bonds | Jan. 15, 2051 | |||||||||||||||||||||||||
First mortgage bonds (b) | June 1, 2052 | |||||||||||||||||||||||||
| Unamortized discount | ( | ( | ||||||||||||||||||||||||
| Unamortized debt issuance cost | ( | ( | ||||||||||||||||||||||||
| Current maturities | ( | ( | ||||||||||||||||||||||||
| Total long-term debt | $ | $ | ||||||||||||||||||||||||
| SPS | ||||||||||||||||||||||||||
| Financing Instrument | Interest Rate | Maturity Date | 2022 | 2021 | ||||||||||||||||||||||
| First mortgage bonds | % | June 15, 2024 | $ | $ | ||||||||||||||||||||||
| First mortgage bonds | June 15, 2024 | |||||||||||||||||||||||||
| Unsecured senior notes | Oct. 1, 2033 | |||||||||||||||||||||||||
| Unsecured senior notes | Oct. 1, 2036 | |||||||||||||||||||||||||
| First mortgage bonds | Aug. 15, 2041 | |||||||||||||||||||||||||
| First mortgage bonds | Aug. 15, 2041 | |||||||||||||||||||||||||
| First mortgage bonds | Aug. 15, 2041 | |||||||||||||||||||||||||
| First mortgage bonds | Aug. 15, 2046 | |||||||||||||||||||||||||
| First mortgage bonds | Aug. 15, 2047 | |||||||||||||||||||||||||
| First mortgage bonds | Nov. 15, 2048 | |||||||||||||||||||||||||
| First mortgage bonds | June 15, 2049 | |||||||||||||||||||||||||
| First mortgage bonds | May 1, 2050 | |||||||||||||||||||||||||
First mortgage bonds (a) | May 1, 2050 | |||||||||||||||||||||||||
First mortgage bonds (b) | June 1, 2052 | |||||||||||||||||||||||||
| Unamortized discount | ( | ( | ||||||||||||||||||||||||
| Unamortized debt issuance cost | ( | ( | ||||||||||||||||||||||||
| Total long-term debt | $ | $ | ||||||||||||||||||||||||
| Other Subsidiaries | ||||||||||||||||||||||||||
| Financing Instrument | Interest Rate | Maturity Date | 2022 | 2021 | ||||||||||||||||||||||
| Various Eloigne affordable housing project notes | 0.00% - 8.00% | 2024 - 2055 | $ | $ | ||||||||||||||||||||||
| Current maturities | ( | ( | ||||||||||||||||||||||||
| Total long-term debt | $ | $ | ||||||||||||||||||||||||
| (Millions of Dollars) | ||||||||
| 2023 | $ | |||||||
| 2024 | ||||||||
| 2025 | ||||||||
| 2026 | ||||||||
| 2027 | ||||||||
| Preferred Stock Authorized (Shares) | Par Value of Preferred Stock | Preferred Stock Outstanding (Shares) 2022 and 2021 | ||||||||||||||||||
| Xcel Energy Inc. | $ | |||||||||||||||||||
| PSCo | ||||||||||||||||||||
| SPS | ||||||||||||||||||||
| Common Stock Authorized (Shares) | Par Value of Common Stock | Common Stock Outstanding (Shares) as of Dec. 31, 2022 | Common Stock Outstanding (Shares) as of Dec. 31, 2021 | |||||||||||||||||
| $ | ||||||||||||||||||||
| Equity to Total Capitalization Ratio Required Range | Equity to Total Capitalization Ratio Actual | |||||||||||||||||||
| Low | High | 2022 | ||||||||||||||||||
| NSP-Minnesota | % | % | % | |||||||||||||||||
| NSP-Wisconsin | N/A | |||||||||||||||||||
SPS (a) | ||||||||||||||||||||
| (Amounts in Millions) | Unrestricted Retained Earnings | Total Capitalization | Limit on Total Capitalization | |||||||||||||||||
| NSP-Minnesota | $ | $ | $ | |||||||||||||||||
NSP-Wisconsin (a) | N/A | |||||||||||||||||||
SPS (b) | N/A | |||||||||||||||||||
| (Millions of Dollars) | Long-Term Debt | Short-Term Debt | |||||||||||||||
| NSP-Minnesota | 52.8% of total capitalization | (a) | $ | (a) | |||||||||||||
| NSP-Wisconsin | $ | ||||||||||||||||
| SPS | |||||||||||||||||
| PSCo | |||||||||||||||||
6. Revenues | ||
| Year Ended Dec. 31, 2022 | ||||||||||||||||||||||||||
| (Millions of Dollars) | Electric | Natural Gas | All Other | Total | ||||||||||||||||||||||
| Major revenue types | ||||||||||||||||||||||||||
| Revenue from contracts with customers: | ||||||||||||||||||||||||||
| Residential | $ | $ | $ | $ | ||||||||||||||||||||||
| C&I | ||||||||||||||||||||||||||
| Other | ||||||||||||||||||||||||||
| Total retail | ||||||||||||||||||||||||||
| Wholesale | ||||||||||||||||||||||||||
| Transmission | ||||||||||||||||||||||||||
| Other | ||||||||||||||||||||||||||
| Total revenue from contracts with customers | ||||||||||||||||||||||||||
| Alternative revenue and other | ||||||||||||||||||||||||||
| Total revenues | $ | $ | $ | $ | ||||||||||||||||||||||
| Year Ended Dec. 31, 2021 | ||||||||||||||||||||||||||
| (Millions of Dollars) | Electric | Natural Gas | All Other | Total | ||||||||||||||||||||||
| Major revenue types | ||||||||||||||||||||||||||
| Revenue from contracts with customers: | ||||||||||||||||||||||||||
| Residential | $ | $ | $ | $ | ||||||||||||||||||||||
| C&I | ||||||||||||||||||||||||||
| Other | ||||||||||||||||||||||||||
| Total retail | ||||||||||||||||||||||||||
| Wholesale | ||||||||||||||||||||||||||
| Transmission | ||||||||||||||||||||||||||
| Other | ||||||||||||||||||||||||||
| Total revenue from contracts with customers | ||||||||||||||||||||||||||
| Alternative revenue and other | ||||||||||||||||||||||||||
| Total revenues | $ | $ | $ | $ | ||||||||||||||||||||||
| Year Ended Dec. 31, 2020 | ||||||||||||||||||||||||||
| (Millions of Dollars) | Electric | Natural Gas | All Other | Total | ||||||||||||||||||||||
| Major revenue types | ||||||||||||||||||||||||||
| Revenue from contracts with customers: | ||||||||||||||||||||||||||
| Residential | $ | $ | $ | $ | ||||||||||||||||||||||
| C&I | ||||||||||||||||||||||||||
| Other | ||||||||||||||||||||||||||
| Total retail | ||||||||||||||||||||||||||
| Wholesale | ||||||||||||||||||||||||||
| Transmission | ||||||||||||||||||||||||||
| Other | ||||||||||||||||||||||||||
| Total revenue from contracts with customers | ||||||||||||||||||||||||||
| Alternative revenue and other | ||||||||||||||||||||||||||
| Total revenues | $ | $ | $ | $ | ||||||||||||||||||||||
7. Income Taxes | ||
| 2022 | 2021 (a) | 2020 (a) | ||||||||||||||||||
| Federal statutory rate | % | % | % | |||||||||||||||||
| State income tax on pretax income, net of federal tax effect | ||||||||||||||||||||
| (Decreases) increases in tax from: | ||||||||||||||||||||
Wind PTCs (b) | ( | ( | ( | |||||||||||||||||
Plant regulatory differences (c) | ( | ( | ( | |||||||||||||||||
| Other tax credits, net NOL & tax credit allowances | ( | ( | ( | |||||||||||||||||
| NOL Carryback | ( | |||||||||||||||||||
| Other, net | ( | ( | ||||||||||||||||||
| Effective income tax rate | ( | % | ( | % | ( | % | ||||||||||||||
| (Millions of Dollars) | 2022 | 2021 | 2020 | |||||||||||||||||
| Current federal tax expense (benefit) | $ | $ | $ | ( | ||||||||||||||||
| Current state tax expense (benefit) | ( | |||||||||||||||||||
| Current change in unrecognized tax expense | ||||||||||||||||||||
| Deferred federal tax benefit | ( | ( | ( | |||||||||||||||||
| Deferred state tax expense | ||||||||||||||||||||
| Deferred change in unrecognized tax expense (benefit) | ( | |||||||||||||||||||
| Deferred ITCs | ( | ( | ( | |||||||||||||||||
| Total income tax benefit | $ | ( | $ | ( | $ | ( | ||||||||||||||
| (Millions of Dollars) | 2022 | 2021 | 2020 | |||||||||||||||||
| Deferred tax (benefit) expense excluding items below | $ | ( | $ | $ | ||||||||||||||||
| Amortization and adjustments to deferred income taxes on income tax regulatory assets and liabilities | ( | ( | ||||||||||||||||||
| Tax (benefit) expense allocated to other comprehensive income and other | ( | ( | ||||||||||||||||||
| Deferred tax benefit | $ | ( | $ | ( | $ | ( | ||||||||||||||
| (Millions of Dollars) | 2022 | 2021 (a) | ||||||||||||
| Deferred tax liabilities: | ||||||||||||||
| Differences between book and tax bases of property | $ | $ | ||||||||||||
| Regulatory assets | ||||||||||||||
| Operating lease assets | ||||||||||||||
| Deferred fuel costs | ||||||||||||||
| Pension expense | ||||||||||||||
| Other | ||||||||||||||
| Total deferred tax liabilities | $ | $ | ||||||||||||
| Deferred tax assets: | ||||||||||||||
| Tax credit carryforward | $ | $ | ||||||||||||
| Regulatory liabilities | ||||||||||||||
| Operating lease liabilities | ||||||||||||||
| Other employee benefits | ||||||||||||||
| NOL carryforward | ||||||||||||||
| NOL and tax credit valuation allowances | ( | ( | ||||||||||||
| Deferred ITCs | ||||||||||||||
| Other | ||||||||||||||
| Total deferred tax assets | $ | $ | ||||||||||||
| Net deferred tax liability | $ | $ | ||||||||||||
| (Millions of Dollars) | 2022 | 2021 | ||||||||||||
| Federal NOL carryforward | $ | $ | ||||||||||||
| Federal tax credit carryforwards | ||||||||||||||
| State NOL carryforwards | ||||||||||||||
| Valuation allowances for state NOL carryforwards | ( | ( | ||||||||||||
State tax credit carryforwards, net of federal detriment (a) | ||||||||||||||
Valuation allowances for state credit carryforwards, net of federal benefit (b) | ( | ( | ||||||||||||
| Tax Year(s) | Expiration | |||||||
| 2014 - 2016 | March 2024 | |||||||
| 2019 | October 2023 | |||||||
| State | Tax Year(s) | Expiration | ||||||||||||
| Colorado | 2014 - 2016 | March 2025 | ||||||||||||
| Colorado | 2018 | September 2023 | ||||||||||||
| Minnesota | 2014 - 2016 | September 2024 | ||||||||||||
| Minnesota | 2018 | June 2023 | ||||||||||||
| Texas | 2016 | May 2023 | ||||||||||||
| Texas | 2017 | July 2025 | ||||||||||||
| Texas | 2018 | November 2023 | ||||||||||||
| Wisconsin | 2016 - 2017 | April 2023 | ||||||||||||
| Wisconsin | 2018 | October 2023 | ||||||||||||
| (Millions of Dollars) | Dec. 31, 2022 | Dec. 31, 2021 | ||||||||||||
| Unrecognized tax benefit — Permanent tax positions | $ | $ | ||||||||||||
| Unrecognized tax benefit — Temporary tax positions | ||||||||||||||
| Total unrecognized tax benefit | $ | $ | ||||||||||||
| (Millions of Dollars) | 2022 | 2021 | 2020 | |||||||||||||||||
| Balance at Jan. 1 | $ | $ | $ | |||||||||||||||||
| Additions based on tax positions related to the current year | ||||||||||||||||||||
| Reductions based on tax positions related to the current year | ( | |||||||||||||||||||
| Additions for tax positions of prior years | ||||||||||||||||||||
| Reductions for tax positions of prior years | ( | ( | ( | |||||||||||||||||
| Reductions for tax positions related to settlements with taxing authorities | ( | |||||||||||||||||||
| Reductions for tax positions related to statute of limitations | ( | |||||||||||||||||||
| Balance at Dec. 31 | $ | $ | $ | |||||||||||||||||
| (Millions of Dollars) | Dec. 31, 2022 | Dec. 31, 2021 | ||||||||||||
| NOL and tax credit carryforwards | $ | ( | $ | ( | ||||||||||
| (Millions of Dollars) | 2022 | 2021 | 2020 | |||||||||||||||||
| Payable for interest related to unrecognized tax benefits at Jan. 1 | $ | ( | $ | ( | $ | |||||||||||||||
| Interest expense related to unrecognized tax benefits | ( | ( | ||||||||||||||||||
| Payable for interest related to unrecognized tax benefits at Dec. 31 | $ | ( | $ | ( | $ | ( | ||||||||||||||
8. Share-Based Compensation | ||
| (Units in Thousands) | 2022 | 2021 | 2020 | |||||||||||||||||
| Granted units | ||||||||||||||||||||
| Weighted average grant date fair value | $ | $ | $ | |||||||||||||||||
| (Units in Thousands, Fair Value in Millions) | 2022 | 2021 | 2020 | |||||||||||||||||
| Vested Units | ||||||||||||||||||||
| Total Fair Value | $ | $ | $ | |||||||||||||||||
| (Units in Thousands) | Units | Weighted Average Grant Date Fair Value | ||||||||||||
| Nonvested Units at Jan. 1, 2022 | $ | |||||||||||||
| Granted | ||||||||||||||
| Forfeited | ( | |||||||||||||
| Vested | ( | |||||||||||||
| Dividend equivalents | ||||||||||||||
| Nonvested Units at Dec. 31, 2022 | ||||||||||||||
| (Units in Thousands) | 2022 | 2021 | 2020 | |||||||||||||||||
| Granted units | ||||||||||||||||||||
| Weighted average grant date fair value | $ | $ | $ | |||||||||||||||||
| (Units in Thousands) | Units | Weighted Average Grant Date Fair Value | ||||||||||||
| Stock equivalent units at Jan. 1, 2022 | $ | |||||||||||||
| Granted | ||||||||||||||
| Units distributed | ( | |||||||||||||
| Dividend equivalents | ||||||||||||||
| Stock equivalent units at Dec. 31, 2022 | ||||||||||||||
| (In Thousands) | 2022 | 2021 | 2020 | |||||||||||||||||
| Awards granted | ||||||||||||||||||||
| (Units In Thousands, Settlement Amount in Millions) | 2022 | 2021 | 2020 | |||||||||||||||||
| Awards settled | ||||||||||||||||||||
| Settlement amount (cash, common stock and deferred amounts) | $ | $ | $ | |||||||||||||||||
| (Millions of Dollars) | 2022 | 2021 | 2020 | |||||||||||||||||
Cost for share-based awards (a) | $ | $ | $ | |||||||||||||||||
| Tax benefit recognized in income | ||||||||||||||||||||
9. Earnings Per Share | ||
| (Shares in Millions) | 2022 | 2021 | 2020 | |||||||||||||||||
| Basic | ||||||||||||||||||||
Diluted (a) | ||||||||||||||||||||
10. Fair Value of Financial Assets and Liabilities | ||
| Dec. 31, 2022 | ||||||||||||||||||||||||||||||||||||||
| Fair Value | ||||||||||||||||||||||||||||||||||||||
| (Millions of Dollars) | Cost | Level 1 | Level 2 | Level 3 | NAV | Total | ||||||||||||||||||||||||||||||||
Nuclear decommissioning fund (a) | ||||||||||||||||||||||||||||||||||||||
| Cash equivalents | $ | $ | $ | $ | $ | $ | ||||||||||||||||||||||||||||||||
| Commingled funds | ||||||||||||||||||||||||||||||||||||||
| Debt securities | ||||||||||||||||||||||||||||||||||||||
| Equity securities | ||||||||||||||||||||||||||||||||||||||
| Total | $ | $ | $ | $ | $ | $ | ||||||||||||||||||||||||||||||||
| Dec. 31, 2021 | ||||||||||||||||||||||||||||||||||||||
| Fair Value | ||||||||||||||||||||||||||||||||||||||
| (Millions of Dollars) | Cost | Level 1 | Level 2 | Level 3 | NAV | Total | ||||||||||||||||||||||||||||||||
Nuclear decommissioning fund (a) | ||||||||||||||||||||||||||||||||||||||
| Cash equivalents | $ | $ | $ | $ | $ | $ | ||||||||||||||||||||||||||||||||
| Commingled funds | ||||||||||||||||||||||||||||||||||||||
| Debt securities | ||||||||||||||||||||||||||||||||||||||
| Equity securities | ||||||||||||||||||||||||||||||||||||||
| Total | $ | $ | $ | $ | $ | $ | ||||||||||||||||||||||||||||||||
| Final Contractual Maturity | ||||||||||||||||||||||||||||||||
| (Millions of Dollars) | Due in 1 Year or Less | Due in 1 to 5 Years | Due in 5 to 10 Years | Due after 10 Years | Total | |||||||||||||||||||||||||||
| Debt securities | $ | $ | $ | $ | $ | |||||||||||||||||||||||||||
(Amounts in Millions) (a)(b) | Dec. 31, 2022 | Dec. 31, 2021 | ||||||||||||
| MWh of electricity | ||||||||||||||
| MMBtu of natural gas | ||||||||||||||
| Pre-Tax Fair Value Gains (Losses) Recognized During the Period in: | ||||||||||||||
| (Millions of Dollars) | Accumulated Other Comprehensive Loss | Regulatory (Assets) and Liabilities | ||||||||||||
| Year Ended Dec. 31, 2022 | ||||||||||||||
| Derivatives designated as cash flow hedges | ||||||||||||||
| Interest rate | $ | $ | ||||||||||||
| Total | $ | $ | ||||||||||||
| Other derivative instruments | ||||||||||||||
| Electric commodity | $ | $ | ( | |||||||||||
| Natural gas commodity | ( | |||||||||||||
| Total | $ | $ | ( | |||||||||||
| Year Ended Dec. 31, 2021 | ||||||||||||||
| Interest rate | $ | $ | ||||||||||||
| Total | $ | $ | ||||||||||||
| Other derivative instruments | ||||||||||||||
| Electric commodity | $ | $ | ||||||||||||
| Natural gas commodity | ( | |||||||||||||
| Total | $ | $ | ||||||||||||
| Year Ended Dec. 31, 2020 | ||||||||||||||
| Interest rate | $ | ( | $ | |||||||||||
| Total | $ | ( | $ | |||||||||||
| Other derivative instruments | ||||||||||||||
| Electric commodity | $ | $ | ( | |||||||||||
| Natural gas commodity | ( | |||||||||||||
| Total | $ | $ | ( | |||||||||||
| Pre-Tax (Gains) Losses Reclassified into Income During the Period from: | Pre-Tax Gains (Losses) Recognized During the Period in Income | ||||||||||||||||||||||
| (Millions of Dollars) | Accumulated Other Comprehensive Loss | Regulatory Assets and (Liabilities) | |||||||||||||||||||||
| Year Ended Dec. 31, 2022 | |||||||||||||||||||||||
| Derivatives designated as cash flow hedges | |||||||||||||||||||||||
| Interest rate | $ | (a) | $ | $ | |||||||||||||||||||
| Total | $ | $ | $ | ||||||||||||||||||||
| Other derivative instruments | |||||||||||||||||||||||
| Commodity trading | $ | $ | $ | (b) | |||||||||||||||||||
| Electric commodity | (c) | ||||||||||||||||||||||
| Natural gas commodity | (d) | ( | (d)(e) | ||||||||||||||||||||
| Total | $ | $ | $ | ( | |||||||||||||||||||
| Year Ended Dec. 31, 2021 | |||||||||||||||||||||||
| Derivatives designated as cash flow hedges | |||||||||||||||||||||||
| Interest rate | $ | (a) | $ | $ | |||||||||||||||||||
| Total | $ | $ | $ | ||||||||||||||||||||
| Other derivative instruments | |||||||||||||||||||||||
| Commodity trading | $ | $ | $ | (b) | |||||||||||||||||||
| Electric commodity | ( | (c) | |||||||||||||||||||||
| Natural gas commodity | (d) | ( | (d)(e) | ||||||||||||||||||||
| Total | $ | $ | ( | $ | |||||||||||||||||||
| Year Ended Dec. 31, 2020 | |||||||||||||||||||||||
| Derivatives designated as cash flow hedges | |||||||||||||||||||||||
| Interest rate | $ | (a) | $ | $ | |||||||||||||||||||
| Total | $ | $ | $ | ||||||||||||||||||||
| Other derivative instruments | |||||||||||||||||||||||
| Commodity trading | $ | $ | $ | ( | (b) | ||||||||||||||||||
| Electric commodity | ( | (c) | |||||||||||||||||||||
| Natural gas commodity | (d) | ( | (d)(e) | ||||||||||||||||||||
| Total | $ | $ | $ | ( | |||||||||||||||||||
| Dec. 31, 2022 | Dec. 31, 2021 | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Fair Value | Fair Value Total | Netting (a) | Fair Value | Fair Value Total | Netting (a) | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| (Millions of Dollars) | Level 1 | Level 2 | Level 3 | Level 1 | Level 2 | Level 3 | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Current derivative assets | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Other derivative instruments: | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Commodity trading | $ | $ | $ | $ | $ | ( | $ | $ | $ | $ | $ | $ | ( | $ | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Electric commodity | ( | ( | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Natural gas commodity | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Total current derivative assets | $ | $ | $ | $ | $ | ( | $ | $ | $ | $ | $ | ( | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
PPAs (b) | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| $ | $ | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Noncurrent derivative assets | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Other derivative instruments: | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Commodity trading | $ | $ | $ | $ | $ | ( | $ | $ | $ | $ | $ | $ | ( | $ | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Total noncurrent derivative assets | $ | $ | $ | $ | $ | ( | $ | $ | $ | $ | $ | ( | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
PPAs (b) | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Noncurrent derivative instruments | $ | $ | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Dec. 31, 2022 | Dec. 31, 2021 | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Fair Value | Fair Value Total | Netting (a) | Fair Value | Fair Value Total | Netting (a) | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| (Millions of Dollars) | Level 1 | Level 2 | Level 3 | Level 1 | Level 2 | Level 3 | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Current derivative liabilities | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Derivatives designated as cash flow hedges: | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Interest rate | $ | $ | $ | $ | $ | $ | $ | $ | $ | $ | $ | $ | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Other derivative instruments: | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Commodity trading | $ | $ | $ | $ | $ | ( | $ | $ | $ | $ | $ | $ | ( | $ | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Electric commodity | ( | ( | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Natural gas commodity | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Total current derivative liabilities | $ | $ | $ | $ | $ | ( | $ | $ | $ | $ | $ | ( | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
PPAs (b) | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Current derivative instruments | $ | $ | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Noncurrent derivative liabilities | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Other derivative instruments: | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Commodity trading | $ | $ | $ | $ | $ | ( | $ | $ | $ | $ | $ | $ | ( | $ | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Total noncurrent derivative liabilities | $ | $ | $ | $ | $ | ( | $ | $ | $ | $ | $ | ( | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
PPAs (b) | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Noncurrent derivative instruments | $ | $ | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Year Ended Dec. 31 | ||||||||||||||||||||
| (Millions of Dollars) | 2022 | 2021 | 2020 | |||||||||||||||||
| Balance at Jan. 1 | $ | $ | ( | $ | ||||||||||||||||
Purchases (a) | ||||||||||||||||||||
Settlements (a) | ( | ( | ( | |||||||||||||||||
| Net transactions recorded during the period: | ||||||||||||||||||||
Gains (losses) recognized in earnings (b) | ( | |||||||||||||||||||
Net gains recognized as regulatory assets and liabilities (a) | ||||||||||||||||||||
| Balance at Dec. 31 | $ | $ | $ | ( | ||||||||||||||||
| 2022 | 2021 | |||||||||||||||||||||||||
| (Millions of Dollars) | Carrying Amount | Fair Value | Carrying Amount | Fair Value | ||||||||||||||||||||||
| Long-term debt, including current portion | $ | $ | $ | $ | ||||||||||||||||||||||
11. Benefit Plans and Other Postretirement Benefits | ||
Dec. 31, 2022 (a) | Dec. 31, 2021 (a) | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| (Millions of Dollars) | Level 1 | Level 2 | Level 3 | Measured at NAV | Total | Level 1 | Level 2 | Level 3 | Measured at NAV | Total | ||||||||||||||||||||||||||||||||||||||||||||||||||||
| Cash equivalents | $ | $ | $ | $ | $ | $ | $ | $ | $ | $ | ||||||||||||||||||||||||||||||||||||||||||||||||||||
| Commingled funds | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Debt securities | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Equity securities | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Other | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Total | $ | $ | $ | $ | $ | $ | $ | $ | $ | $ | ||||||||||||||||||||||||||||||||||||||||||||||||||||
Dec. 31, 2022 (a) | Dec. 31, 2021 (a) | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| (Millions of Dollars) | Level 1 | Level 2 | Level 3 | Measured at NAV | Total | Level 1 | Level 2 | Level 3 | Measured at NAV | Total | ||||||||||||||||||||||||||||||||||||||||||||||||||||
| Cash equivalents | $ | $ | $ | $ | $ | $ | $ | $ | $ | $ | ||||||||||||||||||||||||||||||||||||||||||||||||||||
| Insurance contracts | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Commingled funds | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Debt securities | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Other | ( | ( | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Total | $ | $ | $ | $ | $ | $ | $ | $ | $ | $ | ||||||||||||||||||||||||||||||||||||||||||||||||||||
| Pension Benefits | Postretirement Benefits | |||||||||||||||||||||||||
| (Millions of Dollars) | 2022 | 2021 | 2022 | 2021 | ||||||||||||||||||||||
| Change in Benefit Obligation: | ||||||||||||||||||||||||||
| Obligation at Jan. 1 | $ | $ | $ | $ | ||||||||||||||||||||||
| Service cost | ||||||||||||||||||||||||||
| Interest cost | ||||||||||||||||||||||||||
| Plan amendments | ||||||||||||||||||||||||||
| Actuarial gain | ( | ( | ( | ( | ||||||||||||||||||||||
| Plan participants’ contributions | ||||||||||||||||||||||||||
| Medicare subsidy reimbursements | ||||||||||||||||||||||||||
Benefit payments (a) | ( | ( | ( | ( | ||||||||||||||||||||||
| Obligation at Dec. 31 | $ | $ | $ | $ | ||||||||||||||||||||||
| Change in Fair Value of Plan Assets: | ||||||||||||||||||||||||||
| Fair value of plan assets at Jan. 1 | $ | $ | $ | $ | ||||||||||||||||||||||
| Actual return on plan assets | ( | ( | ||||||||||||||||||||||||
| Employer contributions | ||||||||||||||||||||||||||
| Plan participants’ contributions | ||||||||||||||||||||||||||
| Benefit payments | ( | ( | ( | ( | ||||||||||||||||||||||
| Fair value of plan assets at Dec. 31 | $ | $ | $ | $ | ||||||||||||||||||||||
| Funded status of plans at Dec. 31 | $ | ( | $ | ( | $ | ( | $ | ( | ||||||||||||||||||
| Amounts recognized in the Consolidated Balance Sheet at Dec. 31: | ||||||||||||||||||||||||||
| Noncurrent assets | $ | $ | $ | $ | ||||||||||||||||||||||
| Current liabilities | ( | ( | ||||||||||||||||||||||||
| Noncurrent liabilities | ( | ( | ( | ( | ||||||||||||||||||||||
| Net amounts recognized | $ | ( | $ | ( | $ | ( | $ | ( | ||||||||||||||||||
| Pension Benefits | Postretirement Benefits | |||||||||||||||||||||||||
| Significant Assumptions Used to Measure Benefit Obligations: | 2022 | 2021 | 2022 | 2021 | ||||||||||||||||||||||
| Discount rate for year-end valuation | % | % | % | % | ||||||||||||||||||||||
| Expected average long-term increase in compensation level | N/A | N/A | ||||||||||||||||||||||||
| Mortality table | PRI-2012 | PRI-2012 | PRI-2012 | PRI-2012 | ||||||||||||||||||||||
| Health care costs trend rate — initial: Pre-65 | N/A | N/A | % | % | ||||||||||||||||||||||
| Health care costs trend rate — initial: Post-65 | N/A | N/A | % | % | ||||||||||||||||||||||
| Ultimate trend assumption — initial: Pre-65 | N/A | N/A | % | % | ||||||||||||||||||||||
| Ultimate trend assumption — initial: Post-65 | N/A | N/A | % | % | ||||||||||||||||||||||
| Years until ultimate trend is reached | N/A | N/A | ||||||||||||||||||||||||
| Pension Benefits | Postretirement Benefits | |||||||||||||||||||||||||||||||||||||
| (Millions of Dollars) | 2022 | 2021 | 2020 | 2022 | 2021 | 2020 | ||||||||||||||||||||||||||||||||
| Service cost | $ | $ | $ | $ | $ | $ | ||||||||||||||||||||||||||||||||
| Interest cost | ||||||||||||||||||||||||||||||||||||||
| Expected return on plan assets | ( | ( | ( | ( | ( | ( | ||||||||||||||||||||||||||||||||
| Amortization of prior service credit | ( | ( | ( | ( | ( | ( | ||||||||||||||||||||||||||||||||
| Amortization of net loss | ||||||||||||||||||||||||||||||||||||||
Settlement charge (a) | ||||||||||||||||||||||||||||||||||||||
| Net periodic pension cost (credit) | ( | ( | ( | |||||||||||||||||||||||||||||||||||
| Effects of regulation | ( | ( | ||||||||||||||||||||||||||||||||||||
| Net benefit cost (credit) recognized for financial reporting | $ | $ | $ | $ | ( | $ | ( | $ | ( | |||||||||||||||||||||||||||||
| Significant Assumptions Used to Measure Costs: | ||||||||||||||||||||||||||||||||||||||
| Discount rate | % | % | % | % | % | % | ||||||||||||||||||||||||||||||||
| Expected average long-term increase in compensation level | ||||||||||||||||||||||||||||||||||||||
| Expected average long-term rate of return on assets | ||||||||||||||||||||||||||||||||||||||
| Pension Benefits | Postretirement Benefits | |||||||||||||||||||||||||
| (Millions of Dollars) | 2022 | 2021 | 2022 | 2021 | ||||||||||||||||||||||
| Amounts Not Yet Recognized as Components of Net Periodic Benefit Cost: | ||||||||||||||||||||||||||
| Net loss | $ | $ | $ | $ | ||||||||||||||||||||||
| Prior service credit | ( | ( | ( | ( | ||||||||||||||||||||||
| Total | $ | $ | $ | $ | ||||||||||||||||||||||
| Amounts Not Yet Recognized as Components of Net Periodic Benefit Cost Have Been Recorded as Follows Based Upon Expected Recovery in Rates: | ||||||||||||||||||||||||||
| Current regulatory assets | $ | $ | $ | $ | ||||||||||||||||||||||
| Noncurrent regulatory assets | ||||||||||||||||||||||||||
| Current regulatory liabilities | ( | ( | ||||||||||||||||||||||||
| Noncurrent regulatory liabilities | ( | ( | ||||||||||||||||||||||||
| Deferred income taxes | ||||||||||||||||||||||||||
| Net-of-tax accumulated other comprehensive income | ||||||||||||||||||||||||||
| Total | $ | $ | $ | $ | ||||||||||||||||||||||
| Measurement date | Dec. 31, 2022 | Dec. 31, 2021 | Dec. 31, 2022 | Dec. 31, 2021 | ||||||||||||||||||||||
| Pension Benefits | Postretirement Benefits | |||||||||||||||||||||||||
| 2022 | 2021 | 2022 | 2021 | |||||||||||||||||||||||
| Domestic and international equity securities | % | % | % | % | ||||||||||||||||||||||
| Long-duration fixed income securities | ||||||||||||||||||||||||||
| Short-to-intermediate fixed income securities | ||||||||||||||||||||||||||
| Alternative investments | ||||||||||||||||||||||||||
| Cash | ||||||||||||||||||||||||||
| Total | % | % | % | % | ||||||||||||||||||||||
| (Millions of Dollars) | Projected Pension Benefit Payments | Gross Projected Postretirement Health Care Benefit Payments | Expected Medicare Part D Subsidies | Net Projected Postretirement Health Care Benefit Payments | ||||||||||||||||||||||
| 2023 | $ | $ | $ | $ | ||||||||||||||||||||||
| 2024 | ||||||||||||||||||||||||||
| 2025 | ||||||||||||||||||||||||||
| 2026 | ||||||||||||||||||||||||||
| 2027 | ||||||||||||||||||||||||||
| 2028 - 2032 | ||||||||||||||||||||||||||
12. Commitments and Contingencies | ||
| (Millions of Dollars) | Jan. 1, 2022 | Amounts Incurred (a) | Accretion | Cash Flow Revisions (b) | Dec. 31, 2022 | |||||||||||||||||||||||||||
| Electric | ||||||||||||||||||||||||||||||||
| Nuclear | $ | $ | $ | $ | $ | |||||||||||||||||||||||||||
| Wind | ( | |||||||||||||||||||||||||||||||
| Steam, hydro and other production | ||||||||||||||||||||||||||||||||
| Distribution | ||||||||||||||||||||||||||||||||
| Natural gas | ||||||||||||||||||||||||||||||||
| Transmission and distribution | ||||||||||||||||||||||||||||||||
| Miscellaneous | ( | |||||||||||||||||||||||||||||||
| Common | ||||||||||||||||||||||||||||||||
| Miscellaneous | ||||||||||||||||||||||||||||||||
| Non-utility | ||||||||||||||||||||||||||||||||
| Miscellaneous | ||||||||||||||||||||||||||||||||
| Total liability | $ | $ | $ | $ | $ | |||||||||||||||||||||||||||
| (Millions of Dollars) | Jan. 1, 2021 | Amounts Incurred (a) | Accretion | Cash Flow Revisions (b) | Dec. 31, 2021 | |||||||||||||||||||||||||||
| Electric | ||||||||||||||||||||||||||||||||
| Nuclear | $ | $ | $ | $ | $ | |||||||||||||||||||||||||||
| Wind | ||||||||||||||||||||||||||||||||
| Steam, hydro and other production | ||||||||||||||||||||||||||||||||
| Distribution | ||||||||||||||||||||||||||||||||
| Natural gas | ||||||||||||||||||||||||||||||||
| Transmission and distribution | ||||||||||||||||||||||||||||||||
| Miscellaneous | ||||||||||||||||||||||||||||||||
| Common | ||||||||||||||||||||||||||||||||
| Miscellaneous | ||||||||||||||||||||||||||||||||
| Non-utility | ||||||||||||||||||||||||||||||||
| Miscellaneous | ||||||||||||||||||||||||||||||||
| Total liability | $ | $ | $ | $ | $ | |||||||||||||||||||||||||||
| (Millions of Dollars) | Dec. 31, 2022 | Dec. 31, 2021 | ||||||||||||
| PPAs | $ | $ | ||||||||||||
| Other | ||||||||||||||
| Gross operating lease ROU assets | ||||||||||||||
| Accumulated amortization | ( | ( | ||||||||||||
| Net operating lease ROU assets | $ | $ | ||||||||||||
| (Millions of Dollars) | Dec. 31, 2022 | Dec. 31, 2021 | ||||||||||||
| Gas storage facilities | $ | $ | ||||||||||||
| Gas pipeline | ||||||||||||||
| Gross finance lease ROU assets | ||||||||||||||
| Accumulated amortization | ( | ( | ||||||||||||
| $ | $ | |||||||||||||
| (Millions of Dollars) | 2022 | 2021 | 2020 | |||||||||||||||||
| Operating leases | ||||||||||||||||||||
| PPA capacity payments | $ | $ | $ | |||||||||||||||||
Other operating leases (a) | ||||||||||||||||||||
Total operating lease expense (b) | $ | $ | $ | |||||||||||||||||
| Finance leases | ||||||||||||||||||||
| Amortization of ROU assets | $ | $ | $ | |||||||||||||||||
| Interest expense on lease liability | ||||||||||||||||||||
| Total finance lease expense | $ | $ | $ | |||||||||||||||||
| (Millions of Dollars) | PPA (a) (b) Operating Leases | Other Operating Leases | Total Operating Leases | Finance Leases (c) | ||||||||||||||||||||||
| 2023 | $ | $ | $ | $ | ||||||||||||||||||||||
| 2024 | ||||||||||||||||||||||||||
| 2025 | ||||||||||||||||||||||||||
| 2026 | ||||||||||||||||||||||||||
| 2027 | ||||||||||||||||||||||||||
| Thereafter | ||||||||||||||||||||||||||
| Total minimum obligation | ||||||||||||||||||||||||||
| Interest component of obligation | ( | ( | ( | ( | ||||||||||||||||||||||
| Present value of minimum obligation | $ | |||||||||||||||||||||||||
| Less current portion | ( | ( | ||||||||||||||||||||||||
| $ | $ | |||||||||||||||||||||||||
| Weighted-average remaining lease term in years | ||||||||||||||||||||||||||
| (Millions of Dollars) | Capacity | Energy (a) | ||||||||||||
| 2023 | $ | $ | ||||||||||||
| 2024 | ||||||||||||||
| 2025 | ||||||||||||||
| 2026 | ||||||||||||||
| 2027 | ||||||||||||||
| Thereafter | ||||||||||||||
| Total | $ | $ | ||||||||||||
| (Millions of Dollars) | Coal | Nuclear fuel | Natural gas supply | Natural gas supply and transportation | ||||||||||||||||||||||
| 2023 | $ | $ | $ | $ | ||||||||||||||||||||||
| 2024 | ||||||||||||||||||||||||||
| 2025 | ||||||||||||||||||||||||||
| 2026 | ||||||||||||||||||||||||||
| 2027 | ||||||||||||||||||||||||||
| Thereafter | ||||||||||||||||||||||||||
| Total | $ | $ | $ | $ | ||||||||||||||||||||||
| (Millions of Dollars) | Minimum Payments | |||||||
| 2023 | $ | |||||||
| 2024 | ||||||||
| 2025 | ||||||||
| 2026 | ||||||||
| 2027 | ||||||||
| Thereafter | ||||||||
13. Other Comprehensive Income | ||
| 2022 | ||||||||||||||||||||
| (Millions of Dollars) | Gains and Losses on Interest Rate Cash Flow Hedges | Defined Benefit Pension and Postretirement Items | Total | |||||||||||||||||
| Accumulated other comprehensive loss at Jan. 1 | $ | ( | $ | ( | $ | ( | ||||||||||||||
| Other comprehensive gain before reclassifications | ||||||||||||||||||||
| Losses reclassified from net accumulated other comprehensive loss: | ||||||||||||||||||||
| Amortization of interest rate hedges | (a) | |||||||||||||||||||
| Amortization of net actuarial loss | (b) | |||||||||||||||||||
| Net current period other comprehensive income | ||||||||||||||||||||
| Accumulated other comprehensive loss at Dec. 31 | $ | ( | $ | ( | $ | ( | ||||||||||||||
| 2021 | ||||||||||||||||||||
| (Millions of Dollars) | Gains and Losses on Interest Rate Cash Flow Hedges | Defined Benefit Pension and Postretirement Items | Total | |||||||||||||||||
| Accumulated other comprehensive loss at Jan. 1 | $ | ( | $ | ( | $ | ( | ||||||||||||||
| Other comprehensive gain before reclassifications | ||||||||||||||||||||
| Losses reclassified from net accumulated other comprehensive loss: | ||||||||||||||||||||
| Amortization of interest rate hedges | (a) | |||||||||||||||||||
| Amortization of net actuarial loss | (b) | |||||||||||||||||||
| Net current period other comprehensive income | ||||||||||||||||||||
| Accumulated other comprehensive loss at Dec. 31 | $ | ( | $ | ( | $ | ( | ||||||||||||||
14. Segment Information | ||
| (Millions of Dollars) | 2022 | 2021 | 2020 | |||||||||||||||||
| Regulated Electric | ||||||||||||||||||||
| Operating revenues — external | $ | $ | $ | |||||||||||||||||
| Intersegment revenue | ||||||||||||||||||||
| Total revenues | $ | $ | $ | |||||||||||||||||
| Depreciation and amortization | ||||||||||||||||||||
| Interest charges and financing costs | ||||||||||||||||||||
| Income tax (benefit) expense | ( | ( | ||||||||||||||||||
| Net income | ||||||||||||||||||||
| Regulated Natural Gas | ||||||||||||||||||||
| Operating revenues — external | $ | $ | $ | |||||||||||||||||
| Intersegment revenue | ||||||||||||||||||||
| Total revenues | $ | $ | $ | |||||||||||||||||
| Depreciation and amortization | ||||||||||||||||||||
| Interest charges and financing costs | ||||||||||||||||||||
| Income tax expense | ||||||||||||||||||||
| Net income | ||||||||||||||||||||
| All Other | ||||||||||||||||||||
| Total revenues | $ | $ | $ | |||||||||||||||||
| Depreciation and amortization | ||||||||||||||||||||
| Interest charges and financing costs | ||||||||||||||||||||
| Income tax benefit | ( | ( | ( | |||||||||||||||||
| Net loss | ( | ( | ( | |||||||||||||||||
| Consolidated Total | ||||||||||||||||||||
| Total revenues | $ | $ | $ | |||||||||||||||||
| Reconciling eliminations | ( | ( | ( | |||||||||||||||||
| Total operating revenues | $ | $ | $ | |||||||||||||||||
| Depreciation and amortization | ||||||||||||||||||||
| Interest charges and financing costs | ||||||||||||||||||||
| Income tax (benefit) expense | ( | ( | ( | |||||||||||||||||
| Net income | ||||||||||||||||||||
ITEM 9 — CHANGES IN AND DISAGREEMENTS WITH ACCOUNTANTS ON ACCOUNTING AND FINANCIAL DISCLOSURE | ||
ITEM 9A — CONTROLS AND PROCEDURES | ||
ITEM 9B — OTHER INFORMATION | ||
ITEM 9C — DISCLOSURE REGARDING FOREIGN JURISDICTIONS THAT PREVENT INSPECTIONS | ||
ITEM 10 — DIRECTORS, EXECUTIVE OFFICERS AND CORPORATE GOVERNANCE | ||
ITEM 11 — EXECUTIVE COMPENSATION | ||
ITEM 12 — SECURITY OWNERSHIP OF CERTAIN BENEFICIAL OWNERS AND MANAGEMENT AND RELATED STOCKHOLDER MATTERS | ||
ITEM 13 — CERTAIN RELATIONSHIPS AND RELATED TRANSACTIONS, AND DIRECTOR INDEPENDENCE | ||
ITEM 14 — PRINCIPAL ACCOUNTANT FEES AND SERVICES | ||
| ITEM 15 — EXHIBIT AND FINANCIAL STATEMENT SCHEDULES | ||
| 1 | Consolidated Financial Statements | ||||||||||
| Management Report on Internal Controls Over Financial Reporting — For the year ended Dec. 31, 2022. | |||||||||||
| Report of Independent Registered Public Accounting Firm — Financial Statements and Internal Controls Over Financial Reporting | |||||||||||
| Consolidated Statements of Income — For each of the three years ended Dec. 31, 2022, 2021, and 2020. | |||||||||||
| Consolidated Statements of Comprehensive Income — For each of the three years ended Dec. 31, 2022, 2021, and 2020. | |||||||||||
| Consolidated Statements of Cash Flows — For each of the three years ended Dec. 31, 2022, 2021, and 2020. | |||||||||||
| Consolidated Balance Sheets — As of Dec. 31, 2022 and 2021. | |||||||||||
| Consolidated Statements of Common Stockholders’ Equity — For each of the three years ended Dec. 31, 2022, 2021, and 2020. | |||||||||||
| 2 | Schedule I — Condensed Financial Information of Registrant. | ||||||||||
| Schedule II — Valuation and Qualifying Accounts and Reserves for the years ended Dec. 31, 2022, 2021, and 2020. | |||||||||||
| 3 | Exhibits | ||||||||||
| * | Indicates incorporation by reference | ||||||||||
| + | Executive Compensation Arrangements and Benefit Plans Covering Executive Officers and Directors | ||||||||||
| Xcel Energy Inc. | |||||||||||
| Exhibit Number | Description | Report or Registration Statement | Exhibit Reference | ||||||||
3.01* | Xcel Energy Inc. Form 8-K dated May 16, 2012 | 3.01 | |||||||||
3.02* | Xcel Energy Inc. Form 8-K dated April 3, 2020 | 3.01 | |||||||||
4.01* | Xcel Energy Inc. Form 10-K for the year ended Dec. 31, 2019 | 4.01 | |||||||||
4.02* | Xcel Energy Inc. Form 8-K dated Dec. 14, 2000 | 4.01 | |||||||||
4.03* | Xcel Energy Inc. Form 8-K dated June 6, 2006 | 4.01 | |||||||||
4.04* | Xcel Energy Inc. Form 8-K dated Jan. 16, 2008 | 4.01 | |||||||||
4.05* | Xcel Energy Inc. Form 8-K dated Jan. 16, 2008 | 4.03 | |||||||||
4.06* | Xcel Energy Inc. Form 8-K dated Sept. 12, 2011 | 4.01 | |||||||||
4.07* | Xcel Energy Inc. Form 8-K dated June 1, 2015 | 4.01 | |||||||||
4.08* | Xcel Energy Inc. Form 8-K dated Dec. 1, 2016 | 4.01 | |||||||||
4.09* | Xcel Energy Inc. Form 8-K dated June 25, 2018 | 4.01 | |||||||||
4.10* | Supplemental Indenture No. 12, dated as of Nov. 7, 2019 by and between Xcel Energy Inc. and Computershare Trust Company, N.A. (as successor to Wells Fargo Bank, National Association), as Trustee, creating $500 million aggregate principal amount of 2.60% Senior Notes, Series due Dec 1. 2029 and $500 million aggregate principal amount of 3.50% Senior Notes, Series due Dec. 1, 2049 | Xcel Energy Inc. Form 8-K dated Nov. 7, 2019 | 4.01 | ||||||||
4.11* | Xcel Energy Inc. Form 8-K dated April 1, 2020 | 4.01 | |||||||||
4.12* | Xcel Energy Inc. Form 8-K dated Sept. 25, 2020 | 4.01 | |||||||||
4.13* | Xcel Energy Inc. Form 8-K dated Nov. 3, 2021 | 4.01 | |||||||||
4.14* | Xcel Energy Form 8-K dated May 6, 2022 | 4.01 | |||||||||
| Xcel Energy Inc. Form 10-K for the year ended Dec. 31, 2008 | 10.02 | ||||||||||
10.02*+ | Xcel Energy Inc. Form 10-K for the year ended Dec. 31, 2008 | 10.05 | |||||||||
10.03*+ | Xcel Energy Inc. Form 10-K for the year ended Dec. 31, 2011 | 10.18 | |||||||||
10.04*+ | Xcel Energy Inc. Form 10-Q for the quarter ended June 30, 2016 | 10.01 | |||||||||
10.05*+ | Xcel Energy Inc. Form 10-Q for the quarter ended June 30, 2018 | 10.01 | |||||||||
10.06*+ | Xcel Energy Inc. Form 10-Q for the quarter ended March 31, 2020 | 10.02 | |||||||||
10.07*+ | Xcel Energy Inc. Form 10-Q for the quarter ended June 30, 2020 | 10.01 | |||||||||
10.08*+ | Xcel Energy Inc. Form 10-K for the year ended Dec. 31, 2008 | 10.17 | |||||||||
10.09*+ | Xcel Energy Inc. Definitive Proxy Statement dated April 6, 2010 | Appendix A | |||||||||
10.10*+ | Xcel Energy Inc. Form 10-Q for the quarter ended March 31, 2013 | 10.01 | |||||||||
10.11*+ | Xcel Energy Inc. Form 10-Q for the quarter ended Sept. 30, 2009 | 10.08 | |||||||||
10.12*+ | Xcel Energy Inc. Form 10-K for the year ended Dec. 31, 2008 | 10.07 | |||||||||
10.13*+ | Xcel Energy Inc. Form 10-K for the year ended Dec. 31, 2011 | 10.17 | |||||||||
10.14*+ | Xcel Energy Inc. Form 10-K for the year ended Dec. 31, 2013 | 10.22 | |||||||||
10.15*+ | Xcel Energy Inc. Form 10-Q for the quarter ended Sept. 30, 2016 | 10.01 | |||||||||
10.16*+ | Xcel Energy Inc. Form 10-Q for the quarter ended Sept. 30, 2017 | 10.1 | |||||||||
10.17*+ | Xcel Energy Inc. Form 10-K for the year ended Dec. 31, 2018 | 10.34 | |||||||||
10.18*+ | Xcel Energy Inc. Form 10-K for the year ended Dec. 31, 2018 | 10.35 | |||||||||
10.19*+ | Xcel Energy Inc. Form 10-K for the year ended Dec. 31, 2019 | 10.32 | |||||||||
10.20*+ | Xcel Energy Inc. Definitive Proxy Statement dated April 5, 2011 | Appendix A | |||||||||
10.21*+ | Xcel Energy Inc. Form 8-K dated May 20, 2015 | 10.02 | |||||||||
10.22*+ | Xcel Energy Inc. Form 10-Q for the quarter ended Sept. 30, 2021 | 10.01 | |||||||||
10.23*+ | Xcel Energy Inc. Form 10-K for the year ended Dec. 31, 2018 | 10.36 | |||||||||
10.24*+ | Xcel Energy Inc. Form U5B dated Nov. 16, 2000 | H-1 | |||||||||
| Xcel Energy Inc. Form 8-K dated Sept. 19, 2022 | 99.01 | ||||||||||
Xcel Energy Inc. Form 8-K dated Dec. 10, 2021 | 10.01 | ||||||||||
| NSP-Minnesota | |||||||||||
| Xcel Energy Inc. Form S-3 dated April 18, 2018 | 4(b)(3) | ||||||||||
| Xcel Energy Inc. Form 10-K for the year ended Dec. 31, 2017 | 4.11 | ||||||||||
| Xcel Energy Inc. Form 10-K for the year ended Dec. 31, 2017 | 4.12 | ||||||||||
| NSP-Minnesota Form 10-12G dated Oct. 5, 2000 | 4.51 | ||||||||||
| Xcel Energy Inc. Form S-3 dated April 18, 2018 | 4(b)(7) | ||||||||||
| NSP-Minnesota Form 10-12G dated Oct. 5, 2000 | 4.63 | ||||||||||
| NSP-Minnesota Form 8-K dated July 14, 2005 | 4.01 | ||||||||||
| NSP-Minnesota Form 8-K dated May 18, 2006 | 4.01 | ||||||||||
| NSP-Minnesota Form 8-K dated June 19, 2007 | 4.01 | ||||||||||
| NSP-Minnesota Form 8-K dated Nov. 16, 2009 | 4.01 | ||||||||||
| NSP-Minnesota Form 8-K dated Aug. 4, 2010 | 4.01 | ||||||||||
| NSP-Minnesota Form 8-K dated Aug. 13, 2012 | 4.01 | ||||||||||
| NSP-Minnesota Form 8-K dated May 20, 2013 | 4.01 | ||||||||||
| NSP-Minnesota Form 8-K dated May 13, 2014 | 4.01 | ||||||||||
| NSP-Minnesota Form 8-K dated Aug. 11, 2015 | 4.01 | ||||||||||
| NSP-Minnesota Form 8-K dated May 31, 2016 | 4.01 | ||||||||||
| NSP-Minnesota Form 8-K dated Sept. 13, 2017 | 4.01 | ||||||||||
| NSP-Minnesota Form 8-K dated Sept. 10, 2019 | 4.01 | ||||||||||
| NSP-Minnesota 8-K dated June 15, 2020 | 4.01 | ||||||||||
Supplemental Indenture, dated as of March 1, 2021, by and between NSP-Minnesota and The Bank of New York Mellon Trust Company, N.A., as Trustee, creating $425 million principal amount of 2.25% First Mortgage Bonds, Series due April 1, 2031 and $425 million principal amount of 3.20% First Mortgage Bonds, Series due April 1, 2052 | NSP-Minnesota 8-K dated March 30, 2021 | 4.01 | |||||||||
4.35* | NSP-Minnesota 8-K dated May 9, 2022 | 4.01 | |||||||||
| NSP-Wisconsin Form S-4 dated Jan. 21, 2004 | 10.01 | ||||||||||
| Xcel Energy Inc. Form 8-K dated Sept. 19, 2022 | 99.02 | ||||||||||
| NSP-Wisconsin | |||||||||||
| Xcel Energy Inc. Form S-3 dated April 18, 2018 | 4(c)(3) | ||||||||||
| NSP-Wisconsin Form 8-K dated Sept. 25, 2000 | 4.01 | ||||||||||
Supplemental Trust Indenture, dated as of Sept. 1, 2008, by and between NSP-Wisconsin and U.S. Bank Trust Company, National Association (as successor to U.S. Bank National Association), as Trustee, creating $200 million aggregate principal amount of 6.375% First Mortgage Bonds, Series due Sept. 1, 2038 | NSP-Wisconsin Form 8-K dated Sept. 3, 2008 | 4.01 | |||||||||
Supplemental Trust Indenture, dated as of Oct. 1, 2012, by and between NSP-Wisconsin and U.S. Bank Trust Company, National Association (as successor to U.S. Bank National Association), as Trustee, creating $100 million aggregate principal amount of 3.70% First Mortgage Bonds, Series due Oct. 1, 2042 | NSP-Wisconsin Form 8-K dated Oct. 10, 2012 | 4.01 | |||||||||
| NSP-Wisconsin Form 8-K dated June 23, 2014 | 4.01 | ||||||||||
| NSP-Wisconsin Form 8-K dated Dec. 4, 2017 | 4.01 | ||||||||||
| NSP-Wisconsin Form 8-K dated Sept. 12, 2018 | 4.01 | ||||||||||
| SPS Form 8-K dated Feb. 25, 1999 | 99.2 | ||||||||||
| Xcel Energy Inc. Form 10-Q for the quarter ended Sept. 30, 2003 | 4.04 | ||||||||||
| SPS Form 8-K dated Oct. 3, 2006 | 4.01 | ||||||||||
| SPS Form 8-K dated Aug. 10, 2011 | 4.01 | ||||||||||
| SPS Form 8-K dated Aug. 10, 2011 | 4.02 | ||||||||||
| SPS Form 8-K dated June 9, 2014 | 4.02 | ||||||||||
| SPS Form 8-K dated Aug. 12, 2016 | 4.02 | ||||||||||
| SPS Form 8-K dated Aug 9. 2017 | 4.02 | ||||||||||
| SPS Form 8-K dated Nov. 5, 2018 | 4.02 | ||||||||||
| SPS Form 8-K dated June 18, 2019 | 4.02 | ||||||||||
| SPS Form 8-K dated May 18, 2020 | 4.02 | ||||||||||
4.73* | SPS Form 8-K dated May 31, 2022 | 4.02 | |||||||||
| Xcel Energy Inc. Form 8-K dated Sept. 19, 2022 | 99.04 | ||||||||||
| Xcel Energy Inc. | |||||||||||
| 101.INS | Inline XBRL Instance Document - the instance document does not appear in the Interactive Data File because its XBRL tags are embedded within the Inline XBRL document | ||||||||||
| 101.SCH | Inline XBRL Schema | ||||||||||
| 101.CAL | Inline XBRL Calculation | ||||||||||
| 101.DEF | Inline XBRL Definition | ||||||||||
| 101.LAB | Inline XBRL Label | ||||||||||
| 101.PRE | Inline XBRL Presentation | ||||||||||
| 104 | Cover Page Interactive Data File (formatted as Inline XBRL and contained in Exhibit 101) | ||||||||||
| Year Ended Dec. 31 | |||||||||||||||||
| 2022 | 2021 | 2020 | |||||||||||||||
| Income | |||||||||||||||||
| Equity earnings of subsidiaries | $ | $ | $ | ||||||||||||||
| Total income | |||||||||||||||||
| Expenses and other deductions | |||||||||||||||||
| Operating expenses | |||||||||||||||||
| Other (income) expenses | ( | ( | |||||||||||||||
| Interest charges and financing costs | |||||||||||||||||
| Total expenses and other deductions | |||||||||||||||||
| Income before income taxes | |||||||||||||||||
| Income tax benefit | ( | ( | ( | ||||||||||||||
| Net income | $ | $ | $ | ||||||||||||||
| Other Comprehensive Income | |||||||||||||||||
Pension and retiree medical benefits, net of tax of $ | $ | $ | $ | ||||||||||||||
Derivative instruments, net of tax of $ | ( | ||||||||||||||||
| Other comprehensive income | |||||||||||||||||
| Comprehensive income | $ | $ | $ | ||||||||||||||
| Weighted average common shares outstanding: | |||||||||||||||||
| Basic | |||||||||||||||||
| Diluted | |||||||||||||||||
| Earnings per average common share: | |||||||||||||||||
| Basic | $ | $ | $ | ||||||||||||||
| Diluted | |||||||||||||||||
| See Notes to Condensed Financial Statements | |||||||||||||||||
| Year Ended Dec. 31 | |||||||||||||||||
| 2022 | 2021 | 2020 | |||||||||||||||
| Operating activities | |||||||||||||||||
| Net cash provided by operating activities | $ | $ | $ | ||||||||||||||
| Investing activities | |||||||||||||||||
| Capital contributions to subsidiaries | ( | ( | ( | ||||||||||||||
| Net return (investments) in the utility money pool | ( | ||||||||||||||||
| Other, net | ( | ||||||||||||||||
| Net cash used in investing activities | ( | ( | ( | ||||||||||||||
| Financing activities | |||||||||||||||||
| Proceeds (repayment of) from short-term borrowings, net | ( | ( | |||||||||||||||
| Proceeds from issuance of long-term debt | |||||||||||||||||
| Repayment of long-term debt | ( | ( | |||||||||||||||
| Proceeds from issuance of common stock | |||||||||||||||||
| Repurchase of common stock | ( | ||||||||||||||||
| Dividends paid | ( | ( | ( | ||||||||||||||
| Other | ( | ( | ( | ||||||||||||||
| Net cash provided by financing activities | ( | ||||||||||||||||
| Net change in cash, cash equivalents, and restricted cash | ( | ( | |||||||||||||||
| Cash, cash equivalents and restricted cash at beginning of period | |||||||||||||||||
| Cash, cash equivalents and restricted cash at end of period | $ | $ | $ | ||||||||||||||
| See Notes to Condensed Financial Statements | |||||||||||||||||
| Dec. 31 | ||||||||||||||
| 2022 | 2021 | |||||||||||||
| Assets | ||||||||||||||
| Cash and cash equivalents | $ | $ | ||||||||||||
| Accounts receivable from subsidiaries | ||||||||||||||
| Derivative instruments | ||||||||||||||
| Other current assets | ||||||||||||||
| Total current assets | ||||||||||||||
| Investment in subsidiaries | ||||||||||||||
| Other assets | ( | |||||||||||||
| Total other assets | ||||||||||||||
| Total assets | $ | $ | ||||||||||||
| Liabilities and Equity | ||||||||||||||
| Current portion of long-term debt | ||||||||||||||
| Dividends payable | ||||||||||||||
| Short-term debt | ||||||||||||||
| Other current liabilities | ||||||||||||||
| Total current liabilities | ||||||||||||||
| Other liabilities | ||||||||||||||
| Total other liabilities | ||||||||||||||
| Commitments and contingencies | ||||||||||||||
| Capitalization | ||||||||||||||
| Long-term debt | ||||||||||||||
| Common stockholders' equity | ||||||||||||||
| Total capitalization | ||||||||||||||
| Total liabilities and equity | $ | $ | ||||||||||||
| See Notes to Condensed Financial Statements | ||||||||||||||
| (Millions of Dollars) | Guarantor | Guarantee Amount | Current Exposure | Triggering Event | ||||||||||||||||||||||
Guarantee of loan for Hiawatha Collegiate High School (a) | Xcel Energy Inc. | $ | (b) | |||||||||||||||||||||||
Guarantee of Capital Services purchase contract for solar generating equipment. (c) | Xcel Energy Inc. | (d) | (b) | |||||||||||||||||||||||
Guarantee performance and payment of surety bonds for Xcel Energy Inc.’s utility subsidiaries (e) | Xcel Energy Inc. | (f) | (g) | |||||||||||||||||||||||
| (Millions of Dollars) | 2022 | 2021 | ||||||||||||
| NSP-Minnesota | $ | $ | ||||||||||||
| NSP-Wisconsin | ||||||||||||||
| PSCo | ||||||||||||||
| SPS | ||||||||||||||
| Xcel Energy Services Inc. | ||||||||||||||
| Other subsidiaries of Xcel Energy Inc. | ||||||||||||||
| $ | $ | |||||||||||||
| (Amounts in Millions, Except Interest Rates) | Three Months Ended Dec. 31, 2022 | |||||||
| Loan outstanding at period end | $ | |||||||
| Average loan outstanding | ||||||||
| Maximum loan outstanding | ||||||||
| Weighted average interest rate, computed on a daily basis | % | |||||||
| Weighted average interest rate at end of period | N/A | |||||||
| Money pool interest income | $ | |||||||
| (Amounts in Millions, Except Interest Rates) | Year Ended Dec. 31, 2022 | Year Ended Dec. 31, 2021 | Year Ended Dec. 31, 2020 | |||||||||||||||||
| Loan outstanding at period end | $ | $ | $ | |||||||||||||||||
| Average loan outstanding | ||||||||||||||||||||
| Maximum loan outstanding | ||||||||||||||||||||
| Weighted average interest rate, computed on a daily basis | % | % | % | |||||||||||||||||
| Weighted average interest rate at end of period | N/A | N/A | ||||||||||||||||||
| Money pool interest income | $ | $ | $ | |||||||||||||||||
| Allowance for bad debts | NOL and tax credit valuation allowances | ||||||||||||||||||||||||||||||||||||||||
| (Millions of Dollars) | 2022 | 2021 | 2020 | 2022 | 2021 | 2020 | |||||||||||||||||||||||||||||||||||
| Balance at Jan. 1 | $ | $ | $ | $ | $ | $ | |||||||||||||||||||||||||||||||||||
| Additions charged to costs and expenses | |||||||||||||||||||||||||||||||||||||||||
| Additions charged to other accounts | (a) | (a) | (a) | ||||||||||||||||||||||||||||||||||||||
| Deductions from reserves | ( | (b) | ( | (b) | ( | (b) | ( | (c) | ( | (c) | ( | (d) | |||||||||||||||||||||||||||||
| Balance at Dec. 31 | $ | $ | $ | $ | $ | $ | |||||||||||||||||||||||||||||||||||
ITEM 16 — FORM 10-K SUMMARY | ||
| XCEL ENERGY INC. | ||||||||
| Feb. 23, 2023 | By: | /s/ BRIAN J. VAN ABEL | ||||||
| Brian J. Van Abel | ||||||||
| Executive Vice President, Chief Financial Officer | ||||||||
| /s/ ROBERT C. FRENZEL | Chairman, President, Chief Executive Officer and Director | ||||||||||
| Robert C. Frenzel | (Principal Executive Officer) | ||||||||||
| /s/ BRIAN J. VAN ABEL | Executive Vice President, Chief Financial Officer | ||||||||||
| Brian J. Van Abel | (Principal Accounting Officer and Principal Financial Officer) | ||||||||||
| * | Director | ||||||||||
| Megan Burkhart | |||||||||||
| * | Director | ||||||||||
| Lynn Casey | |||||||||||
| * | Director | ||||||||||
| Netha Johnson | |||||||||||
| * | Director | ||||||||||
| Patricia L. Kampling | |||||||||||
| * | Director | ||||||||||
| George J. Kehl | |||||||||||
| * | Director | ||||||||||
| Richard T. O’Brien | |||||||||||
| * | Director | ||||||||||
| Charles Pardee | |||||||||||
| * | Director | ||||||||||
| Christopher J. Policinski | |||||||||||
| * | Director | ||||||||||
| James Prokopanko | |||||||||||
| * | Director | ||||||||||
| Kim Williams | |||||||||||
| * | Director | ||||||||||
| Daniel Yohannes | |||||||||||
| *By: | /s/ BRIAN J. VAN ABEL | Attorney-in-Fact | |||||||||
| Brian J. Van Abel | |||||||||||
SUBSIDIARY (a) | STATE OF INCORPORATION | PURPOSE | ||||||||||||
| Northern States Power Company (a Minnesota corporation) | Minnesota | Electric and gas utility | ||||||||||||
| Northern States Power Company (a Wisconsin corporation) | Wisconsin | Electric and gas utility | ||||||||||||
| Public Service Company of Colorado | Colorado | Electric and gas utility | ||||||||||||
| Southwestern Public Service Company | New Mexico | Electric utility | ||||||||||||
| WestGas InterState, Inc. | Colorado | Natural gas transmission company | ||||||||||||
| Xcel Energy Wholesale Group Inc. | Minnesota | Intermediate holding company for subsidiaries providing wholesale energy | ||||||||||||
| Xcel Energy Markets Holdings Inc. | Minnesota | Intermediate holding company for subsidiaries providing energy marketing services | ||||||||||||
| Xcel Energy International Inc. | Delaware | Intermediate holding company for international subsidiaries | ||||||||||||
| Xcel Energy Ventures Inc. | Minnesota | Intermediate holding company for subsidiaries developing new businesses | ||||||||||||
| Xcel Energy Retail Holdings Inc. | Minnesota | Intermediate holding company for subsidiaries providing services to retail customers | ||||||||||||
| Xcel Energy Communications Group Inc. | Minnesota | Intermediate holding company for subsidiaries providing telecommunications and related services | ||||||||||||
| Xcel Energy WYCO Inc. | Colorado | Intermediate holding company holding investment in WYCO | ||||||||||||
| Xcel Energy Services Inc. | Delaware | Service company for Xcel Energy system | ||||||||||||
| Xcel Energy Transmission Holding Company, LLC | Delaware | Intermediate holding company for subsidiaries developing and providing energy transmission services | ||||||||||||
| Xcel Energy Venture Holdings, Inc. | Minnesota | Intermediate holding company holding investment in Energy Impact Fund | ||||||||||||
| Nicollet Project Holdings LLC | Minnesota | Intermediate holding company holding investment in Nicollet Projects I LLC and Nicollet Projects II LLC | ||||||||||||
| Nicollet Holdings Company LLC | Minnesota | Intermediate holding company for subsidiaries procuring equipment for renewable generation facilities at other subsidiaries | ||||||||||||
| Xcel Energy Nuclear Services Holdings, LLC | Delaware | Intermediate holding company for nuclear subsidiaries | ||||||||||||
| /s/ DELOITTE & TOUCHE LLP | |||||
| Minneapolis, Minnesota | |||||
| February 23, 2023 | |||||
| /s/ ROBERT C. FRENZEL | ||||||||
| Robert C. Frenzel | ||||||||
| Chairman, President, Chief Executive Officer and Director | ||||||||
| /s/ MEGAN BURKHART | ||||||||
| Megan Burkhart | ||||||||
| Director | ||||||||
| /s/ LYNN CASEY | ||||||||
| Lynn Casey | ||||||||
| Director | ||||||||
| /s/ NETHA JOHNSON JR. | ||||||||
| Netha Johnson Jr. | ||||||||
| Director | ||||||||
| /s/ PATRICIA KAMPLING | ||||||||
| Patricia Kampling | ||||||||
| Director | ||||||||
| /s/ GEORGE KEHL | ||||||||
| George Kehl | ||||||||
| Director | ||||||||
| /s/ RICHARD O'BRIEN | ||||||||
| Richard O'Brien | ||||||||
| Director | ||||||||
| /s/ CHARLES PARDEE | ||||||||
| Charles Pardee | ||||||||
| Director | ||||||||
| /s/ CHRISTOPHER POLICINSKI | ||||||||
| Christopher Policinski | ||||||||
| Director | ||||||||
| /s/ JAMES PROKOPANKO | ||||||||
| James Prokopanko | ||||||||
| Director | ||||||||
| /s/ KIM WILLIAMS | ||||||||
| Kim Williams | ||||||||
| Director | ||||||||
| /s/ DANIEL YOHANNES | ||||||||
| Daniel Yohannes | ||||||||
| Director | ||||||||
| /s/ ROBERT C. FRENZEL | |||||
| Robert C. Frenzel | |||||
| Chairman, President, Chief Executive Officer and Director | |||||
| /s/ BRIAN J. VAN ABEL | |||||
| Brian J. Van Abel | |||||
| Executive Vice President, Chief Financial Officer | |||||
| /s/ ROBERT C. FRENZEL | |||||
| Robert C. Frenzel | |||||
| Chairman, President, Chief Executive Officer and Director | |||||
| /s/ BRIAN J. VAN ABEL | |||||
| Brian J. Van Abel | |||||
| Executive Vice President, Chief Financial Officer | |||||
Audit Information |
12 Months Ended |
|---|---|
Dec. 31, 2022 | |
| Auditor [Line Items] | |
| Auditor Firm ID | 34 |
| Auditor Name | DELOITTE & TOUCHE LLP |
| Auditor Location | Minneapolis, Minnesota |
Accounting Pronouncements |
12 Months Ended |
|---|---|
Dec. 31, 2022 | |
| Accounting Standards Update and Change in Accounting Principle [Abstract] | |
| Accounting Pronouncements | As of Dec. 31, 2022, there was no material impact from the recent adoption of new accounting pronouncements, nor expected material impact from recently issued accounting pronouncements yet to be adopted, on Xcel Energy’s consolidated financial statements. |
CONSOLIDATED STATEMENTS OF INCOME (Parenthetical) - USD ($) $ in Millions |
12 Months Ended | ||
|---|---|---|---|
Dec. 31, 2022 |
Dec. 31, 2021 |
Dec. 31, 2020 |
|
| Income Statement [Abstract] | |||
| Other financing costs | $ 31 | $ 29 | $ 28 |
CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME - USD ($) $ in Millions |
12 Months Ended | ||
|---|---|---|---|
Dec. 31, 2022 |
Dec. 31, 2021 |
Dec. 31, 2020 |
|
| Comprehensive income: | |||
| Net income | $ 1,736 | $ 1,597 | $ 1,473 |
| Pension and retiree medical benefits: | |||
| Net pension and retiree medical gains (losses) arising during the period, net of tax of $1, $— and $(2), respectively | 5 | 0 | (5) |
| Reclassification of losses to net income, net of tax of $1, $3 and $3, respectively | (4) | (8) | (10) |
| Derivative instruments: | |||
| Net fair value increase (decrease), net of tax of $6, $1 and $(3), respectively | 16 | 4 | (10) |
| Reclassification of losses to net income, net of tax of $2, $2 and $2, respectively | (5) | (6) | (5) |
| Total other comprehensive income | 30 | 18 | |
| Total comprehensive income | $ 1,766 | $ 1,615 | $ 1,473 |
CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (Parenthetical) - USD ($) $ in Millions |
12 Months Ended | ||
|---|---|---|---|
Dec. 31, 2022 |
Dec. 31, 2021 |
Dec. 31, 2020 |
|
| Statement of Comprehensive Income [Abstract] | |||
| Net pension gains (losses), tax | $ 1 | $ 0 | $ (2) |
| Pension reclassifications, tax | (1) | (3) | (3) |
| Derivative fair value decrease, tax | 6 | 1 | (3) |
| Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), Reclassification, Tax | $ 2 | $ 2 | $ 2 |
CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Millions |
12 Months Ended | ||
|---|---|---|---|
Dec. 31, 2022 |
Dec. 31, 2021 |
Dec. 31, 2020 |
|
| Operating activities | |||
| Net income | $ 1,736 | $ 1,597 | $ 1,473 |
| Adjustments to reconcile net income to cash provided by operating activities: | |||
| Depreciation and amortization | 2,436 | 2,143 | 1,959 |
| Nuclear fuel amortization | 118 | 114 | 123 |
| Deferred income taxes | 140 | 79 | 8 |
| Allowance for equity funds used during construction | (75) | (73) | (115) |
| Earnings from equity method investments | (36) | (62) | (40) |
| Dividends from equity method investments | 37 | 42 | 42 |
| Provision for bad debts | 73 | 60 | 60 |
| Share-based compensation expense | 20 | 31 | 73 |
| Changes in operating assets and liabilities: | |||
| Accounts receivable | (429) | (164) | (154) |
| Accrued unbilled revenues | (243) | (149) | (3) |
| Inventories | (203) | (126) | (80) |
| Other current assets | (58) | (34) | (45) |
| Accounts payable | 195 | 138 | (33) |
| Net regulatory assets and liabilities | 570 | (973) | (144) |
| Other current liabilities | 102 | (1) | 29 |
| Pension and other employee benefit obligations | (49) | (135) | (125) |
| Other, net | (122) | (140) | (164) |
| Net Cash Provided by (Used in) Operating Activities, Total | 3,932 | 2,189 | 2,848 |
| Investing activities | |||
| Capital/construction expenditures | (4,638) | (4,244) | (5,369) |
| Sale of MEC | 0 | 0 | 684 |
| Purchase of investment securities | (1,332) | (757) | (1,398) |
| Proceeds from the sale of investment securities | 1,297 | 743 | 1,378 |
| Other, net | 20 | (29) | (35) |
| Net Cash Provided by (Used in) Investing Activities, Total | (4,653) | (4,287) | (4,740) |
| Financing activities | |||
| (Repayments of) proceeds from short-term borrowings, net | (192) | 421 | (11) |
| Proceeds from Issuance of Long-term Debt | 2,164 | 2,710 | 2,940 |
| Repayments of long-term debt | (601) | (417) | (1,001) |
| Proceeds from Issuance of Common Stock | 322 | 366 | 727 |
| Payments of Dividends | (1,012) | (935) | (856) |
| Proceeds from (Payments for) Other Financing Activities | (15) | (10) | (26) |
| Net Cash Provided by (Used in) Financing Activities, Total | 666 | 2,135 | 1,773 |
| Net change in cash and cash equivalents | (55) | 37 | (119) |
| Cash and Cash Equivalents, at Carrying Value, Beginning Balance | 166 | 129 | 248 |
| Cash and Cash Equivalents, at Carrying Value, Ending Balance | 111 | 166 | 129 |
| Supplemental disclosure of cash flow information: | |||
| Interest Paid, Excluding Capitalized Interest, Operating Activities | (887) | (788) | (758) |
| Income Taxes Paid, Net | (15) | (4) | 12 |
| Other Noncash Investing and Financing Items [Abstract] | |||
| Capital Expenditures Incurred but Not yet Paid | 626 | 501 | 400 |
| Inventory transfers to plant, property and equipment | 78 | 87 | 275 |
| Right-of-Use Asset Obtained in Exchange for Operating Lease Liability | 141 | 8 | 369 |
| Allowance for equity funds used during construction | 75 | 73 | 115 |
| Stock Issued | $ 57 | $ 60 | $ 67 |
CONSOLIDATED BALANCE SHEETS - USD ($) $ in Millions |
Dec. 31, 2022 |
Dec. 31, 2021 |
||
|---|---|---|---|---|
| Current assets | ||||
| Cash and cash equivalents | $ 111 | $ 166 | ||
| Accounts receivable, net | 1,373 | 1,018 | ||
| Accrued unbilled revenues | 1,105 | 862 | ||
| Inventories | 803 | 631 | ||
| Regulatory assets | 1,059 | 1,106 | ||
| Derivative instruments | 279 | 123 | ||
| Prepaid taxes | 54 | 44 | ||
| Prepayments and other | 360 | 289 | ||
| Total current assets | 5,144 | 4,239 | ||
| Property, plant and equipment, net | 48,253 | 45,457 | ||
| Other assets | ||||
| Nuclear decommissioning fund and other investments | 3,234 | 3,628 | ||
| Regulatory assets | 2,871 | 2,738 | ||
| Derivative instruments | 93 | 67 | ||
| Operating lease right-of-use assets | 1,204 | 1,291 | ||
| Other | 389 | 431 | ||
| Total other assets | 7,791 | 8,155 | ||
| Total assets | 61,188 | 57,851 | ||
| Current liabilities | ||||
| Current portion of long-term debt | 1,151 | 601 | ||
| Short-term debt | 813 | 1,005 | ||
| Accounts payable | 1,804 | 1,409 | ||
| Regulatory liabilities | [1] | 418 | 271 | |
| Taxes accrued | 569 | 569 | ||
| Accrued interest | 217 | 209 | ||
| Dividends payable | 268 | 249 | ||
| Derivative instruments | 76 | 69 | ||
| Operating Lease, Liability, Current | 217 | 205 | ||
| Other | 545 | 459 | ||
| Total current liabilities | 6,078 | 5,046 | ||
| Deferred credits and other liabilities | ||||
| Deferred income taxes | 4,756 | 4,894 | ||
| Deferred investment tax credits | 48 | 53 | ||
| Regulatory liabilities | [1] | 5,569 | 5,405 | |
| Asset retirement obligations | 3,380 | 3,151 | ||
| Derivative instruments | 113 | 105 | ||
| Customer advances | 181 | 196 | ||
| Pension and employee benefit obligations | 390 | 306 | ||
| Operating lease liabilities | 1,038 | 1,146 | ||
| Other | 147 | 158 | ||
| Total deferred credits and other liabilities | 15,622 | 15,414 | ||
| Commitments and contingencies | ||||
| Capitalization | ||||
| Long-term debt | 22,813 | 21,779 | ||
| Common stock — 1,000,000,000 shares authorized of $2.50 par value; 549,578,018 and 544,025,269 shares outstanding at Dec. 31, 2022 and Dec. 31, 2021, respectively | $ 1,374 | $ 1,360 | ||
| Common stock, shares authorized (in shares) | 1,000,000,000 | 1,000,000,000 | ||
| Common stock, par value (in dollars per share) | $ 2.50 | $ 2.50 | ||
| Common Stock, Shares, Outstanding | 549,578,018 | 544,025,269 | ||
| Additional paid in capital | $ 8,155 | $ 7,803 | ||
| Retained earnings | 7,239 | 6,572 | ||
| Accumulated other comprehensive loss | (93) | (123) | ||
| Total common stockholders’ equity | 16,675 | 15,612 | ||
| Total liabilities and equity | $ 61,188 | $ 57,851 | ||
| ||||
CONSOLIDATED STATEMENTS OF COMMON STOCKHOLDERS' EQUITY - USD ($) $ in Millions |
Total |
Common stock |
Additional Paid In Capital |
Retained Earnings |
Accumulated Other Comprehensive Loss |
|---|---|---|---|---|---|
| Balance (in shares) at Dec. 31, 2019 | 524,539,000 | ||||
| Beginning balance at Dec. 31, 2019 | $ 13,239 | $ 1,311 | $ 6,656 | $ 5,413 | $ (141) |
| Increase (Decrease) in Stockholders' Equity | |||||
| Net income | 1,473 | ||||
| Other comprehensive income | 0 | ||||
| Cash dividends declared per common share (in dollars per share) | $ 1.72 | ||||
| Dividends declared on common stock | (909) | (909) | |||
| Issuances of common stock (in shares) | 12,953,869 | ||||
| Issuances of common stock (value) | 764 | $ 33 | 731 | ||
| Stock repurchased during period (in shares) | (54,475) | ||||
| Repurchases of common stock (value) | (4) | $ 0 | (4) | ||
| Share-based compensation | 14 | 21 | (7) | ||
| Credit Losses, Topic 326 (ASC Topic 326) | (2) | (2) | |||
| Balance (in shares) at Dec. 31, 2020 | 537,438,394 | ||||
| Ending balance at Dec. 31, 2020 | 14,575 | $ 1,344 | 7,404 | 5,968 | (141) |
| Increase (Decrease) in Stockholders' Equity | |||||
| Net income | 1,597 | ||||
| Other comprehensive income | 18 | 18 | |||
| Cash dividends declared per common share (in dollars per share) | $ 1.83 | ||||
| Dividends declared on common stock | (989) | (989) | |||
| Issuances of common stock (in shares) | 6,586,875 | ||||
| Issuances of common stock (value) | 403 | $ 16 | 387 | ||
| Share-based compensation | $ 8 | 12 | (4) | ||
| Balance (in shares) at Dec. 31, 2021 | 544,025,269 | 544,025,269 | |||
| Ending balance at Dec. 31, 2021 | $ 15,612 | $ 1,360 | 7,803 | 6,572 | (123) |
| Increase (Decrease) in Stockholders' Equity | |||||
| Net income | 1,736 | ||||
| Other comprehensive income | 30 | 30 | |||
| Cash dividends declared per common share (in dollars per share) | $ 1.95 | ||||
| Dividends declared on common stock | (1,066) | (1,066) | |||
| Issuances of common stock (in shares) | 5,552,749 | ||||
| Issuances of common stock (value) | 359 | $ 14 | 345 | ||
| Share-based compensation | $ 4 | 7 | (3) | ||
| Balance (in shares) at Dec. 31, 2022 | 549,578,018 | 549,578,018 | |||
| Ending balance at Dec. 31, 2022 | $ 16,675 | $ 1,374 | $ 8,155 | $ 7,239 | $ (93) |
Summary of Significant Accounting Policies |
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| Accounting Policies [Abstract] | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Summary of Significant Accounting Policies | General — Xcel Energy Inc.’s utility subsidiaries are engaged in the regulated generation, purchase, transmission, distribution and sale of electricity and the regulated purchase, transportation, distribution and sale of natural gas. Xcel Energy’s regulated operations include the activities of NSP-Minnesota, NSP-Wisconsin, PSCo and SPS. These utility subsidiaries serve electric and natural gas customers in portions of Colorado, Michigan, Minnesota, New Mexico, North Dakota, South Dakota, Texas and Wisconsin. Also included in regulated operations are WGI, an interstate natural gas pipeline company, and WYCO, a joint venture with CIG to develop and lease natural gas pipeline, storage and compression facilities. Xcel Energy Inc.’s nonregulated subsidiaries include:
Xcel Energy Inc. owns the following additional direct subsidiaries, some of which are intermediate holding companies with additional subsidiaries:
Xcel Energy and its subsidiaries collectively are referred to as Xcel Energy. Xcel Energy’s consolidated financial statements include its wholly-owned subsidiaries and VIEs for which it is the primary beneficiary. All intercompany transactions and balances are eliminated unless a different treatment is appropriate for rate regulated transactions. The equity method of accounting is used for its investments in EIP funds and WYCO. Investments in certain plants and transmission facilities are jointly owned with nonaffiliated utilities. A proportionate share of jointly owned facilities is recorded as property, plant and equipment on the consolidated balance sheets, and Xcel Energy’s share of operating costs associated with these facilities is included in the consolidated statements of income. The consolidated financial statements are presented in accordance with GAAP. All of the utility subsidiaries’ underlying accounting records also conform to the FERC uniform system of accounts. Certain amounts in the consolidated financial statements or notes have been reclassified for comparative purposes; however, such reclassifications did not affect net income, total assets, liabilities, equity or cash flows. Xcel Energy has evaluated events occurring after Dec. 31, 2022 up to the date of issuance of these consolidated financial statements. These statements contain all necessary adjustments and disclosures resulting from that evaluation. Use of Estimates — Xcel Energy uses estimates based on the best information available in recording transactions and balances resulting from business operations. Estimates are used for items such as plant depreciable lives or potential disallowances, AROs, certain regulatory assets and liabilities, tax provisions, uncollectible amounts, environmental costs, unbilled revenues, jurisdictional fuel and energy cost allocations and actuarially determined benefit costs. Recorded estimates are revised when better information becomes available or actual amounts can be determined. Revisions can affect operating results. Regulatory Accounting — The regulated utility subsidiaries account for income and expense items in accordance with accounting guidance for regulated operations. Under this guidance: •Certain costs, which would otherwise be charged to expense or other comprehensive income, are deferred as regulatory assets based on the expected ability to recover the costs in future rates. •Certain credits, which would otherwise be reflected as income or other comprehensive income, are deferred as regulatory liabilities based on the expectation the amounts will be returned to customers in future rates, or because the amounts were collected in rates prior to the costs being incurred. Estimates and assumptions for recovery of deferred costs and refund of deferred credits are based on specific ratemaking decisions, precedent or other information available. Regulatory assets and liabilities are amortized consistent with the treatment in the rate setting process. If changes in the regulatory environment occur, the utility subsidiaries may no longer be eligible to apply this accounting treatment and may be required to eliminate regulatory assets and liabilities. Such changes could have a material effect on Xcel Energy’s results of operations, financial condition and cash flows. See Note 4 for further information. Income Taxes — Xcel Energy accounts for income taxes using the asset and liability method, which requires recognition of deferred tax assets and liabilities for the expected future tax consequences of events that have been included in the financial statements. Income taxes are deferred for all temporary differences between pretax financial and taxable income and between the book and tax bases of assets and liabilities. Rates are utilized that are scheduled to be in effect when the temporary differences are expected to reverse. The effect of a change in tax rates on deferred tax assets and liabilities is recognized in the period that includes the enactment date. The effects of tax rate changes that are attributable to the utility subsidiaries are generally subject to a normalization method of accounting. Therefore, the revaluation of most of the utility subsidiaries’ net deferred taxes upon a tax rate reduction results in the establishment of a net regulatory liability, refundable to utility customers over the remaining life of the related assets. Xcel Energy anticipates that a tax rate increase would predominantly result in the establishment of a regulatory asset, subject to an evaluation of whether future recovery is expected. Reversal of certain temporary differences are accounted for as current income tax expense due to the effects of past regulatory practices when deferred taxes were not required to be recorded due to the use of flow through accounting for ratemaking purposes. Tax credits are recorded when earned unless there is a requirement to defer the benefit and amortize over the book depreciable lives of the related property. The requirement to defer and amortize these credits specifically applies to certain federal ITCs, as determined by tax regulations and Xcel Energy tax elections. For tax credits otherwise eligible to be recognized when earned, Xcel Energy considers the impact of rate regulation to determine if these credits and related adjustments should be deferred as regulatory assets or liabilities. Deferred tax assets are reduced by a valuation allowance if it is more likely than not that some portion or all of the deferred tax asset will not be realized. Utility rate regulation has resulted in the recognition of regulatory assets and liabilities related to income taxes. Xcel Energy measures and discloses uncertain tax positions that it has taken or expects to take in its income tax returns. A tax position is recognized in the consolidated financial statements when it is more likely than not that the position will be sustained upon examination based on the technical merits of the position. Recognition of changes in uncertain tax positions are reflected as a component of income tax expense. Interest and penalties related to income taxes are reported within other (expense) income or interest charges in the consolidated statements of income. Xcel Energy Inc. and its subsidiaries file consolidated federal income tax returns as well as consolidated or separate state income tax returns. Federal income taxes paid by Xcel Energy Inc. are allocated to its subsidiaries based on separate company computations. A similar allocation is made for state income taxes paid by Xcel Energy Inc. in connection with consolidated state filings. Xcel Energy Inc. also allocates its own income tax benefits to its direct subsidiaries. See Note 7 for further information. Property, Plant and Equipment and Depreciation in Regulated Operations — Property, plant and equipment is stated at original cost. The cost of plant includes direct labor and materials, contracted work, overhead costs and AFUDC. The cost of plant retired is charged to accumulated depreciation and amortization. Amounts recovered in rates for future removal costs are recorded as regulatory liabilities. Significant additions or improvements extending asset lives are capitalized, while repairs and maintenance costs are charged to expense as incurred. Maintenance and replacement of items determined to be less than a unit of property are charged to operating expenses as incurred. Property, plant and equipment is tested for impairment when it is determined that the carrying value of the assets may not be recoverable. A loss is recognized in the current period if it becomes probable that part of a cost of a plant under construction or recently completed plant will be disallowed for recovery from customers and a reasonable estimate of the disallowance can be made. For investments in property, plant and equipment that are abandoned and not expected to go into service, incurred costs and related deferred tax amounts are compared to the discounted estimated future rate recovery, and a loss is recognized, if necessary. Depreciation expense is recorded using the straight-line method over the plant’s commission approved useful life. Actuarial life studies are performed and submitted to the state and federal commissions for review. Upon acceptance by the various commissions, the resulting lives and net salvage rates are used to calculate depreciation. Plant removal costs are typically recognized at the amounts recovered in rates as authorized by the applicable regulator. Accumulated removal costs are reflected in the consolidated balance sheet as a regulatory liability. Depreciation expense, expressed as a percentage of average depreciable property, was approximately 3.7% for 2022, 3.5% for 2021 and 3.4% for 2020. See Note 3 for further information. AROs — Xcel Energy records AROs as a liability for the fair value of an ARO to be recognized in the period incurred (if it can be reasonably estimated), with the offsetting/associated costs capitalized as a long-lived asset. The liability is generally increased over time by applying the effective interest method of accretion and the capitalized costs are typically depreciated over the useful life of the long-lived asset. Changes resulting from revisions to timing or amounts of expected asset retirement cash flows are recognized as an increase or a decrease in the ARO. See Note 12 for further information. Nuclear Decommissioning — Nuclear decommissioning studies that estimate NSP-Minnesota’s costs of decommissioning its nuclear power plants are normally performed at least every years and submitted to the state commissions for approval. Due to other regulatory activity, the next decommissioning study has been deferred one year until 2024. NSP-Minnesota recovers regulator-approved decommissioning costs of its nuclear power plants over each facility’s expected service life, typically based on the triennial decommissioning studies. The studies consider estimated future costs of decommissioning and the market value of investments in trust funds and recommend annual funding amounts. Amounts collected in rates are deposited in the trust funds. For financial reporting purposes, NSP-Minnesota accounts for nuclear decommissioning as an ARO. Restricted funds for the payment of future decommissioning expenditures for NSP-Minnesota’s nuclear facilities are included in nuclear decommissioning fund and other assets on the consolidated balance sheets. See Notes 10 and 12 for further information. Benefit Plans and Other Postretirement Benefits — Xcel Energy maintains pension and postretirement benefit plans for eligible employees. Recognizing the cost of providing benefits and measuring the projected benefit obligation of these plans requires management to make various assumptions and estimates. Certain unrecognized actuarial gains and losses and unrecognized prior service costs or credits are deferred as regulatory assets and liabilities, rather than recorded as other comprehensive income, based on regulatory recovery mechanisms. See Note 11 for further information. Environmental Costs — Environmental costs are recorded when it is probable Xcel Energy is liable for remediation costs and the amount can be reasonably estimated. Costs are deferred as a regulatory asset if it is probable the costs will be recovered from customers in future rates. Otherwise, the costs are expensed. For certain environmental costs related to facilities currently in use, such as for emission-control equipment, the cost is capitalized and depreciated over the life of the plant. Estimated remediation costs are regularly adjusted as estimates are revised and remediation is performed. If other participating potentially responsible parties exist and acknowledge their potential involvement with a site, costs are estimated and recorded only for Xcel Energy’s expected share of the cost. Future costs of restoring sites are treated as a capitalized cost of plant retirement. The depreciation expense levels recoverable in rates include a provision for removal expenses. Removal costs recovered in rates before the related costs are incurred are classified as a regulatory liability. See Note 12 for further information. Revenue from Contracts with Customers — Performance obligations related to the sale of energy are satisfied as energy is delivered to customers. Xcel Energy recognizes revenue that corresponds to the price of the energy delivered to the customer. The measurement of energy sales to customers is generally based on the reading of their meters, which occurs systematically throughout the month. At the end of each month, amounts of energy delivered to customers since the date of the last meter reading are estimated, and the corresponding unbilled revenue is recognized. A separate financing component of collections from customers is not recognized as contract terms are short-term in nature. Revenues are net of any excise or sales taxes or fees. The utility subsidiaries recognize physical sales to customers (native load and wholesale) on a gross basis in electric revenues and cost of sales. Revenues and charges for short-term physical wholesale sales of excess energy transacted through RTOs are also recorded on a gross basis. Other revenues and charges settled/facilitated through an RTO are recorded on a net basis in cost of sales. See Note 6 for further information. Cash and Cash Equivalents — Xcel Energy considers investments in instruments with a remaining maturity of months or less at the time of purchase to be cash equivalents. Accounts Receivable and Allowance for Bad Debts — Accounts receivable are stated at the actual billed amount net of an allowance for bad debts. Xcel Energy establishes an allowance for uncollectible receivables based on a policy that reflects its expected exposure to the credit risk of customers. As of Dec. 31, 2022 and 2021, the allowance for bad debts was $122 million and $106 million, respectively. Inventory — Inventory is recorded at the lower of average cost or net realizable value and consisted of the following:
Equity Method Investments — The equity method of accounting is used for certain investments including WYCO and EIP funds, which requires Xcel Energy’s recognition of its share of these investees’ results, based on Xcel Energy’s proportional ownership interest. For investments in EIP funds, this includes Xcel Energy’s share of fund expenses and realized gains and losses, as well as unrealized gains and losses resulting from valuations of the funds’ investments in emerging energy technology companies. Fair Value Measurements — Xcel Energy presents cash equivalents, interest rate derivatives, commodity derivatives and nuclear decommissioning fund assets at estimated fair values in its consolidated financial statements. For interest rate derivatives, quoted prices based primarily on observable market interest rate curves are used to estimate fair value. For commodity derivatives, the most observable inputs available are generally used to determine the fair value of each contract. In the absence of a quoted price, quoted prices for similar contracts or internally prepared valuation models may be used to determine fair value. For the pension and postretirement plan assets and nuclear decommissioning fund, published trading data and pricing models, generally using the most observable inputs available, are utilized to determine fair value for each security. See Notes 10 and 11 for further information. Derivative Instruments — Xcel Energy uses derivative instruments in connection with its commodity trading activities, and to manage risk associated with changes in interest rates, and utility commodity prices, including forward contracts, futures, swaps and options. Any derivative instruments not qualifying for the normal purchases and normal sales exception are recorded on the consolidated balance sheets at fair value as derivative instruments. Classification of changes in fair value for those derivative instruments is dependent on the designation of a qualifying hedging relationship. Changes in fair value of derivative instruments not designated in a qualifying hedging relationship are reflected in current earnings or as a regulatory asset or liability. Classification as a regulatory asset or liability is based on commission approved regulatory recovery mechanisms. Gains or losses on commodity trading transactions are recorded as a component of electric operating revenues. Normal Purchases and Normal Sales — Xcel Energy enters into contracts for purchases and sales of commodities for use in its operations. At inception, contracts are evaluated to determine whether they contain a derivative, and if so, whether they may be exempted from derivative accounting if designated as normal purchases or normal sales. See Note 10 for further information. Commodity Trading Operations — All applicable gains and losses related to commodity trading activities are shown on a net basis in electric operating revenues in the consolidated statements of income. Commodity trading activities are not associated with energy produced from generation assets or energy and capacity purchased to serve native load. Commodity trading contracts are recorded at fair market value and commodity trading results include the impact of all margin-sharing mechanisms. See Note 10 for further information. Other Utility Items AFUDC — AFUDC represents the cost of capital used to finance utility construction activity and is computed by applying a composite financing rate to qualified CWIP. The amount of AFUDC capitalized as a utility construction cost is credited to other nonoperating income (for equity capital) and interest charges (for debt capital). AFUDC amounts capitalized are included in Xcel Energy’s rate base. Alternative Revenue — Certain rate rider mechanisms (including decoupling/sales true up and CIP/DSM programs) qualify as alternative revenue programs. These mechanisms arise from instances in which the regulator authorizes a future surcharge in response to past activities or completed events. When certain criteria are met, including expected collection within 24 months, revenue is recognized, which may include incentives and return on rate base items. Billing amounts are revised periodically for differences between total amount collected and revenue earned, which may increase or decrease the level of revenue collected from customers. Alternative revenues arising from these programs are presented on a gross basis and disclosed separately from revenue from contracts with customers. See Note 6 for further information. Conservation Programs — Costs incurred for DSM and CIP programs are deferred if it is probable future revenue will recover the incurred cost. Revenues recognized for incentive programs for the recovery of lost margins and/or conservation performance incentives are limited to amounts expected to be collected within 24 months from the year they are earned. Regulatory assets are recognized to reflect the amount of costs or earned incentives that have not yet been collected from customers. Emissions Allowances — Emissions allowances are recorded at cost, including broker commission fees. The inventory accounting model is utilized for all emissions allowances and any sales of these allowances are included in electric revenues. Nuclear Refueling Outage Costs — Xcel Energy uses a deferral and amortization method for nuclear refueling costs. This method amortizes costs over the period between refueling outages consistent with rate recovery. RECs — Cost of RECs that are utilized for compliance is recorded as electric fuel and purchased power expense. In certain jurisdictions, Xcel Energy reduces recoverable fuel and purchased power costs for the cost of RECs received. An inventory accounting model is used to account for RECs, however these assets are classified as regulatory assets if amounts are recoverable in future rates. Sales of RECs are recorded in electric revenues on a gross basis. The cost of these RECs and amounts credited to customers under margin-sharing mechanisms are recorded in electric fuel and purchased power expense. Cost of RECs that are utilized to support commodity trading activities are recorded in a similar manner as the associated commodities and are on a net basis in electric operating revenues in the consolidated statements of income.
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| Property, Plant and Equipment Disclosure | Major classes of property, plant and equipment
(a)Amounts as of Dec. 31, 2021 include Sherco Units 1, 2 and 3 and A.S. King for NSP-Minnesota; Comanche Unit 1 and 2 and Craig Units 1 and 2 for PSCo; and Tolk and coal generation assets at Harrington pending facility gas conversion for SPS. Following the June 2022 approval of PSCo’s revised resource plan settlement, amounts as of Dec. 31, 2022 include the addition of Comanche Unit 3, Hayden Units 1 and 2 and coal generation assets at Pawnee pending facility gas conversion as well as the removal of Comanche Unit 1 that was retired in 2022. Amounts are presented net of accumulated depreciation. Joint Ownership of Generation, Transmission and Gas Facilities The utility subsidiaries’ jointly owned assets as of Dec. 31, 2022:
(a)Projects additionally include $4 million in CWIP.
(a)Projects additionally include $1 million in CWIP.
(a)Projects additionally include $10 million in CWIP. Each company’s share of operating expenses and construction expenditures is included in the applicable utility accounts. Respective owners are responsible for providing their own financing.
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Regulatory Assets and Liabilities |
12 Months Ended | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Regulatory Assets and Liabilities Disclosure [Abstract] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Regulatory Assets and Liabilities | Regulatory assets and liabilities are created for amounts that regulators may allow to be collected or may require to be paid back to customers in future electric and natural gas rates. Xcel Energy would be required to recognize the write-off of regulatory assets and liabilities in net income or other comprehensive income if changes in the utility industry no longer allow for the application of regulatory accounting guidance under GAAP. Components of regulatory assets:
(a)Prior period amounts have been restated to conform with current year presentation. (b)Includes amounts recorded for future recovery of AROs, less amounts recovered through nuclear decommissioning accruals and gains from decommissioning investments. (c)Includes costs for conservation programs, as well as incentives allowed in certain jurisdictions. (d)Includes the fair value of certain long-term PPAs used to meet energy capacity requirements and valuation adjustments on natural gas commodity purchases. Components of regulatory liabilities:
(a)Prior period amounts have been restated to conform with current year presentation. (b)Includes the revaluation of recoverable/regulated plant accumulated deferred income taxes and revaluation impact of non-plant accumulated deferred income taxes due to the TCJA. (c)Includes regulatory amortization and certain 2018 TCJA benefits approved by the CPUC to offset the PSCo prepaid pension asset. (d)Includes the fair value of FTR instruments utilized/intended to offset the impacts of transmission system congestion. (e)Includes costs for conservation programs, as well as incentives allowed in certain jurisdictions. (f)Revenue subject to refund of $67 million and $17 million for 2022 and 2021, respectively, is included in other current liabilities. Xcel Energy’s regulatory assets not earning a return include the unfunded portion of pension and retiree medical obligations and net AROs (i.e. deferrals for which cash has not been disbursed). In addition, regulatory assets included $1,020 million and $1,718 million at Dec. 31, 2022 and 2021 respectively, of past expenditures not earning a return. Amounts are predominately related to purchased natural gas and electric energy costs (including certain costs related to Winter Storm Uri), sales true-up and revenue decoupling, various renewable resources/environmental initiatives and certain prepaid pension amounts.
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Borrowings and Other Financing Instruments Borrowings and Other Financing Instruments |
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| Debt Disclosure [Abstract] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Borrowings and Other Financing Instruments | Short-Term Borrowings Short-Term Debt — Xcel Energy meets its short-term liquidity requirements primarily through the issuance of commercial paper and borrowings under their credit facilities and term loan agreements. Commercial paper and other borrowings outstanding:
Bilateral Credit Agreement — In April 2022, NSP-Minnesota’s uncommitted bilateral credit agreement was renewed for an additional one-year term. The credit agreement is limited in use to support letters of credit. As of Dec. 31, 2022, NSP-Minnesota had $54 million outstanding letters of credit under the $75 million Bilateral Credit Agreement. Letters of Credit — Xcel Energy uses letters of credit, typically with terms of one year, to provide financial guarantees for certain operating obligations. As of Dec. 31, 2022 and 2021, there were $43 million and $19 million of letters of credit outstanding under the credit facilities, respectively. Amounts approximate their fair value. Credit Facilities — In order to use commercial paper programs to fulfill short-term funding needs, Xcel Energy Inc. and its utility subsidiaries must have revolving credit facilities in place at least equal to the amount of their respective commercial paper borrowing limits and cannot issue commercial paper exceeding available capacity under these credit facilities. The lines of credit provide short-term financing in the form of notes payable to banks, letters of credit and back-up support for commercial paper borrowings. Amended Credit Agreements — In September 2022, Xcel Energy Inc., NSP-Minnesota, NSP-Wisconsin, PSCo and SPS each entered into an amended five-year credit agreement with a syndicate of banks. The aggregate borrowing limit was increased to $3.55 billion. The amended credit agreements have substantially the same terms and conditions as the prior agreements, with the following changes: •Maturities extended from June 2024 to September 2027. •Borrowing limit for Xcel Energy Inc. increased from $1.25 billion to $1.5 billion. •Borrowing limit for NSP-Minnesota increased from $500 million to $700 million. Features of the credit facilities:
(a) Each credit facility has a financial covenant requiring that the debt-to-total capitalization ratio be less than or equal to 65%. (b) All extension requests are subject to majority bank group approval. (c) The Xcel Energy Inc. credit facility has a cross-default provision that Xcel Energy Inc. would be in default on its borrowings under the facility if it or any of its subsidiaries (except NSP-Wisconsin as long as its total assets do not comprise more than 15% of Xcel Energy’s consolidated total assets) default on indebtedness in an aggregate principal amount exceeding $75 million. If Xcel Energy Inc. or its utility subsidiaries do not comply with the covenant, an event of default may be declared, and if not remedied, any outstanding amounts due under the facility can be declared due by the lender. As of Dec. 31, 2022, Xcel Energy Inc. and its subsidiaries were in compliance with all financial covenants. Xcel Energy Inc. and its utility subsidiaries had the following committed credit facilities available as of Dec. 31, 2022:
(a)These credit facilities mature in September 2027. (b)Includes outstanding commercial paper and letters of credit. All credit facility bank borrowings, outstanding letters of credit and outstanding commercial paper reduce the available capacity under the credit facilities. Xcel Energy Inc. and its utility subsidiaries had no direct advances on facilities outstanding as of Dec. 31, 2022 and 2021. Long-Term Borrowings and Other Financing Instruments Generally, the property of NSP-Minnesota, NSP-Wisconsin, PSCo and SPS is subject to the liens of their respective first mortgage indentures for the benefit of bondholders. Debt premiums, discounts and expenses are amortized over the life of the related debt. The premiums, discounts and expenses for refinanced debt are deferred and amortized over the life of the new issuance. Long-term debt obligations for Xcel Energy Inc. and its utility subsidiaries as of Dec. 31 (in millions of dollars):
(a)2021 financing. (b)2022 financing.
(a)2021 financing. (b)2022 financing.
(a)2021 financing. (b)2022 financing.
(a)2021 financing. (b)2022 financing.
(a)2020 financing re-opened in 2021. (b)2022 financing.
Maturities of long-term debt:
Deferred Financing Costs — Deferred financing costs of approximately $193 million and $184 million, net of amortization, are presented as a deduction from the carrying amount of long-term debt as of Dec. 31, 2022 and 2021, respectively. Equity through DRIP and Benefits Program — Xcel Energy issued $84 million and $74 million of equity through the DRIP and benefits programs in 2022 and 2021, respectively. The program allows shareholders to reinvest their dividends directly in Xcel Energy Inc. common stock. ATM Equity Offering — In November 2021, Xcel Energy Inc. filed a prospectus supplement under which it may sell up to $800 million of its common stock through an ATM program. In 2021, 5.33 million shares of common stock were issued (approximately $350 million). In 2022, 4.30 million shares of common stock were issued (approximately $300 million). As of Dec. 31, 2022, approximately $150 million remained available for sale under the ATM program. Capital Stock — Preferred stock authorized/outstanding:
Xcel Energy Inc. had the following common stock authorized/outstanding:
Dividend and Other Capital-Related Restrictions — Xcel Energy depends on its utility subsidiaries to pay dividends. Xcel Energy Inc.’s utility subsidiaries’ dividends are subject to the FERC’s jurisdiction, which prohibits the payment of dividends out of capital accounts. Dividends are solely to be paid from retained earnings. Certain covenants also require Xcel Energy Inc. to be current on interest payments prior to dividend disbursements. State regulatory commissions impose dividend limitations for NSP-Minnesota, NSP-Wisconsin and SPS, which are more restrictive than those imposed by the FERC. Requirements and actuals as of Dec. 31, 2022:
(a) Excludes short-term debt.
(a) Cannot pay annual dividends in excess of forecasted levels if its average equity-to-total capitalization ratio falls below the commission authorized level. (b) May not pay a dividend that would cause a loss of its investment grade bond rating. Issuance of securities by Xcel Energy Inc. is not generally subject to regulatory approval. However, utility financings and intra-system financings are subject to the jurisdiction of state regulatory commissions and/or the FERC. Xcel Energy may seek additional authorization as necessary. Amounts authorized to issue as of Dec. 31, 2022:
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Revenues |
12 Months Ended | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Revenue from Contract with Customer [Abstract] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Revenues | Revenue is classified by the type of goods/services rendered and market/customer type. Xcel Energy’s operating revenues consisted of the following:
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Income Taxes |
12 Months Ended | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Income Tax Disclosure [Abstract] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Income Taxes | Total income tax expense from operations differs from the amount computed by applying the statutory federal income tax rate to income before income tax expense. Effective income tax rate for years ended Dec. 31:
(a)Prior period amounts have been restated to conform with current year presentation. (b)Wind PTCs are credited to customers (reduction to revenue) and do not materially impact net income. (c)Regulatory differences for income tax primarily relate to the credit of excess deferred taxes to customers through the average rate assumption method. Income tax benefits associated with the credit of excess deferred taxes are offset by corresponding revenue reductions and additional prepaid pension asset amortization. Components of income tax expense for years ended Dec. 31:
Components of deferred income tax expense as of Dec. 31:
Components of net deferred tax liability as of Dec. 31:
(a)Prior periods have been reclassified to conform to current year presentation. Other Income Tax Matters — NOL amounts represent the tax loss that is carried forward and tax credits represent the deferred tax asset. NOL and tax credit carryforwards as of Dec. 31:
(a)State tax credit carryforwards are net of federal detriment of $23 million and $24 million as of Dec. 31, 2022 and 2021. (b)Valuation allowances for state tax credit carryforwards were net of federal benefit of $16 million and $17 million as of Dec. 31, 2022 and 2021. Federal carryforward periods expire starting 2032 and state carryforward periods expire starting 2022. Federal Loss Carryback Claims - In 2020, Xcel Energy identified certain expense related to tax years 2009 - 2011 that qualify for an extended carryback claim. As a result, a tax benefit of approximately $13 million was recognized in 2020. Unrecognized Tax Benefits Federal Audit — Statute of limitations applicable to Xcel Energy’s consolidated federal income tax returns expire as follows:
Additionally, the statute of limitations related to the federal tax credit carryforwards will remain open until those credits are utilized in subsequent returns. Further, the statute of limitations related to the additional federal tax loss carryback claim filed in 2020 has been extended. Xcel Energy has recognized its best estimate of income tax expense that will result from a final resolution of this issue; however, the outcome and timing of a resolution is unknown. State Audits — Xcel Energy files consolidated state tax returns based on income in its major operating jurisdictions and various other state income-based tax returns. As of Dec. 31, 2022, Xcel Energy’s earliest open tax years (subject to examination by state taxing authorities in its major operating jurisdictions) were as follows:
•In 2020, Minnesota began an audit of tax years 2015-2018. In 2022, the state of Minnesota issued its audit report without any material adjustments. •In 2021, Texas began an audit of tax years 2016-2019. As of Dec. 31, 2022, no material adjustments have been proposed. •In 2021, Wisconsin began an audit of tax years 2016-2019. As of Dec. 31, 2022, no material adjustments have been proposed. •No other state income tax audits are in progress for its major operating jurisdictions as of Dec. 31, 2022. Unrecognized tax benefit balance includes permanent tax positions, which if recognized would affect the ETR. In addition, the unrecognized tax benefit balance includes temporary tax positions for which deductibility is highly certain, but for which there is uncertainty about the timing. A change in the period of deductibility would not affect the ETR but would accelerate the payment to the taxing authority. Unrecognized tax benefits - permanent vs. temporary:
Changes in unrecognized tax benefits:
Unrecognized tax benefits were reduced by tax benefits associated with NOL and tax credit carryforwards:
As the IRS progresses its review of the tax loss carryback claims and as state audits progress, it is reasonably possible that the amount of unrecognized tax benefit could decrease up to approximately $40 million in the next 12 months. Payable for interest related to unrecognized tax benefits is partially offset by the interest benefit associated with NOL and tax credit carryforwards. Interest payable related to unrecognized tax benefits:
No penalties were accrued related to unrecognized tax benefits as of Dec. 31, 2022, 2021 or 2020.
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Share-Based Compensation |
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| Share-Based Payment Arrangement [Abstract] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Share-Based Compensation | Incentive Plan Including Share-Based Compensation — Xcel Energy has authorized 7.0 million equity shares under an incentive plan (the Amended and Restated 2015 Omnibus Incentive Plan). Equity Awards — Xcel Energy‘s Board of Directors has granted equity awards under the 2015 Omnibus Incentive Plan, which includes various vesting conditions and performance goals. At the end of the restricted period, such grants will be awarded if vesting conditions and/or performance goals are met. Certain employees are granted equity awards with a portion subject only to service conditions, and the other portion subject to performance conditions. A total of 0.2 million time-based equity shares subject only to service conditions were granted annually in 2022, 2021 and 2020. The performance conditions for a portion of the awards granted from 2020 to 2022 are based on relative TSR and environmental goals. Equity awards with performance conditions will be settled or forfeited after three years, with payouts ranging from zero to 200% depending on achievement. Equity award units granted to employees:
Equity awards vested:
Changes in the nonvested portion of equity award units:
Stock Equivalent Units — Non-employee members of Xcel Energy‘s Board of Directors may elect to receive their annual equity grant as stock equivalent units in lieu of common stock. Each unit’s value is equal to one share of common stock. The annual equity grant is vested as of the date of each member’s election to the Board of Directors; there is no further service or other condition. Directors may also elect to receive their cash fees as stock equivalent units in lieu of cash. Stock equivalent units are payable as a distribution of common stock upon a director’s termination of service. Stock equivalent units granted:
Changes in stock equivalent units:
Liability Awards — Xcel Energy’s Board of Directors has granted TSR liability awards under the 2015 Omnibus Incentive Plan. This plan allows Xcel Energy to attach various performance goals to the awards granted. The liability awards have been historically dependent on relative TSR measured over a -year period. Xcel Energy Inc.’s TSR is compared to a peer group of other utility companies. Potential payouts of the awards range from zero to 200%. Liability awards granted:
Liability awards settled:
TSR liability awards of $21 million were settled in cash in 2022. Share-Based Compensation Expense — Award settlement determination (permitting cash or share settlement) is made by Xcel Energy, not the participants. Equity awards have not been previously settled in cash and Xcel Energy plans to continue electing share settlement. Grant date fair value of equity awards is expensed over the service period. TSR liability awards are accounted for as liabilities, as historically they are partially settled in cash. As liability awards, the fair value on which ratable expense is based, as employees vest in their rights to those awards, is remeasured each period based on the current stock price and performance achievement, and final expense is based on the market value of the shares on the date the award is settled. Compensation costs related to share-based awards:
(a)Compensation costs for share-based payments are included in O&M expense. Amount for equity awards (non-cash) amounted to $20 million in 2022. There was approximately $37 million and $28 million as of Dec. 31, 2022 and 2021, respectively, of total unrecognized compensation cost related to nonvested share-based compensation awards. Xcel Energy expects to recognize the unrecognized amount over a weighted average period of 1.8 years.
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Earnings Per Share |
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| Earnings Per Share [Abstract] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Earnings Per Share | Basic EPS was computed by dividing the earnings available to common shareholders by the weighted average number of common shares outstanding. Diluted EPS was computed by dividing the earnings available to common shareholders by the diluted weighted average number of common shares outstanding. Diluted EPS reflects the potential dilution that could occur if securities or other agreements to issue common stock (i.e., common stock equivalents) were settled. The weighted average number of potentially dilutive shares outstanding used to calculate diluted EPS is calculated using the treasury stock method. Common Stock Equivalents — Common stock equivalents include commitments to issue common stock related to time-based equity compensation awards. Stock equivalent units granted to Xcel Energy’s Board of Directors are included in common shares outstanding upon grant date as there is no further service, performance or market condition associated with these. Restricted stock issued to employees under the Executive Annual Incentive Award Plan is included in common shares outstanding when granted. Share-based compensation arrangements for which there is currently no dilutive impact to EPS include the following: •Equity awards subject to a performance condition; included in common shares outstanding when all necessary conditions for settlement have been satisfied by the end of the reporting period. •Liability awards subject to a performance condition; any portions settled in shares are included in common shares outstanding upon settlement. Common shares outstanding used in the basic and diluted EPS computation:
(a)Diluted common shares outstanding included common stock equivalents of 0.3 million, 0.3 million and 1.1 million shares for 2022, 2021 and 2020, respectively.
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Fair Value of Financial Assets and Liabilities |
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| Fair Value Disclosures [Abstract] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Fair Value of Financial Assets and Liabilities | Fair Value Measurements Accounting guidance for fair value measurements and disclosures provides a hierarchical framework for disclosing the observability of the inputs utilized in measuring assets and liabilities at fair value. •Level 1 — Quoted prices are available in active markets for identical assets or liabilities as of the reporting date. The types of assets and liabilities included in Level 1 are actively traded instruments with observable actual trading prices. •Level 2 — Pricing inputs are other than actual trading prices in active markets but are either directly or indirectly observable as of the reporting date. The types of assets and liabilities included in Level 2 are typically either comparable to actively traded securities or contracts or priced with models using highly observable inputs. •Level 3 — Significant inputs to pricing have little or no observability as of the reporting date. The types of assets and liabilities included in Level 3 include those valued with models requiring significant judgment or estimation. Specific valuation methods include: Investments in equity securities and other funds — Equity securities are valued using quoted prices in active markets. The fair values for commingled funds are measured using NAVs. The investments in commingled funds may be redeemed for NAV with proper notice. Private equity commingled funds require approval of the fund for any unscheduled redemption, and such redemptions may be approved or denied by the fund at its sole discretion. Unscheduled distributions from real estate commingled funds may be redeemed with proper notice, however, withdrawals may be delayed or discounted as a result of fund illiquidity. Investments in debt securities — Fair values for debt securities are determined by a third party pricing service using recent trades and observable spreads from benchmark interest rates for similar securities. Interest rate derivatives — Fair values of interest rate derivatives are based on broker quotes that utilize current market interest rate forecasts. Commodity derivatives — Methods used to measure the fair value of commodity derivative forwards and options utilize forward prices and volatilities, as well as pricing adjustments for specific delivery locations, and are generally assigned a Level 2 classification. When contracts relate to inactive delivery locations or extend to periods beyond those readily observable on active exchanges, the significance of the use of less observable inputs on a valuation is evaluated and may result in Level 3 classification. Electric commodity derivatives held by NSP-Minnesota and SPS include transmission congestion instruments, generally referred to as FTRs. FTRs purchased from an RTO are financial instruments that entitle or obligate the holder to monthly revenues or charges based on transmission congestion across a given transmission path. The values of these instruments are derived from, and designed to offset, the costs of transmission congestion. In addition to overall transmission load, congestion is also influenced by the operating schedules of power plants and the consumption of electricity pertinent to a given transmission path. Unplanned plant outages, scheduled plant maintenance, changes in the relative costs of fuels used in generation, weather and overall changes in demand for electricity can each impact the operating schedules of the power plants on the transmission grid and the value of these instruments. FTRs are recognized at fair value and adjusted each period prior to settlement. Given the limited observability of certain variables underlying the reported auction values of FTRs, these fair value measurements have been assigned a Level 3 classification. Net congestion costs, including the impact of FTR settlements, are shared through fuel and purchased energy cost recovery mechanisms. As such, the fair value of the unsettled instruments (i.e., derivative asset or liability) is offset/deferred as a regulatory asset or liability. Non-Derivative Fair Value Measurements Nuclear Decommissioning Fund The NRC requires NSP-Minnesota to maintain a portfolio of investments to fund the costs of decommissioning its nuclear generating plants. Assets of the nuclear decommissioning fund are legally restricted for the purpose of decommissioning these facilities. The fund contains cash equivalents, debt securities, equity securities and other investments. NSP-Minnesota uses the MPUC approved asset allocation for the investment targets by asset class for the qualified trust. NSP-Minnesota recognizes the costs of funding the decommissioning over the lives of the nuclear plants, assuming rate recovery of all costs. Realized and unrealized gains on fund investments over the life of the fund are deferred as an offset of NSP-Minnesota’s regulatory asset for nuclear decommissioning costs. Consequently, any realized and unrealized gains and losses on securities in the nuclear decommissioning fund are deferred as a component of the regulatory asset. Unrealized gains for the nuclear decommissioning fund were $1 billion and $1.3 billion as of Dec. 31, 2022 and 2021, respectively, and unrealized losses were $90 million and $7 million as of Dec. 31, 2022 and 2021, respectively. Non-derivative instruments with recurring fair value measurements in the nuclear decommissioning fund:
(a)Reported in nuclear decommissioning fund and other investments on the consolidated balance sheets, which also includes $219 million of equity method investments and $133 million of rabbi trust assets and other miscellaneous investments.
(a)Reported in nuclear decommissioning fund and other investments on the consolidated balance sheets, which also includes $208 million of equity investments in unconsolidated subsidiaries and $164 million of rabbi trust assets and other miscellaneous investments. For the years ended Dec. 31, 2022 and 2021, there were immaterial Level 3 nuclear decommissioning fund investments or transfer of amounts between levels. Contractual maturity dates of debt securities in the nuclear decommissioning fund as of Dec. 31, 2022:
Rabbi Trusts Xcel Energy has established rabbi trusts to provide partial funding for future distributions of deferred compensation plan. The fair value of assets held in the rabbi trusts were $80 million and $109 million at Dec. 31, 2022 and 2021, respectively, comprised of cash equivalents and mutual funds (level 1 valuation methods). Amounts are reported in nuclear decommissioning fund and other investments on the consolidated balance sheet. Derivative Activities and Fair Value Measurements Xcel Energy enters into derivative instruments, including forward contracts, futures, swaps and options, for trading purposes and to manage risk in connection with changes in interest rates, and utility commodity prices. Interest Rate Derivatives — Xcel Energy enters into contracts that effectively fix the interest rate on a specified principal amount of a hypothetical future debt issuance. These financial swaps net settle based on changes in a specified benchmark interest rate, acting as a hedge of changes in market interest rates that will impact specified anticipated debt issuances. These derivative instruments are designated as cash flow hedges for accounting purposes, with changes in fair value prior to occurrence of the hedged transactions recorded as other comprehensive income. As of Dec. 31, 2022, accumulated other comprehensive loss related to interest rate derivatives included $2 million of net losses expected to be reclassified into earnings during the next 12 months as the hedged transactions impact earnings. As of Dec. 31, 2022, Xcel Energy had unsettled interest swaps outstanding with a notional amount of $40 million. These interest rate derivatives were designated as cash flow hedges, with changes in fair value recorded to other comprehensive income. See Note 13 for the financial impact of qualifying interest rate cash flow hedges on Xcel Energy’s accumulated other comprehensive loss included in the consolidated statements of common stockholder’s equity and in the consolidated statements of comprehensive income. Wholesale and Commodity Trading — Xcel Energy Inc.’s utility subsidiaries conduct various wholesale and commodity trading activities, including the purchase and sale of electric capacity, energy, energy-related instruments and natural gas-related instruments, including derivatives. Xcel Energy is allowed to conduct these activities within guidelines and limitations as approved by its risk management committee, comprised of management personnel not directly involved in the activities governed by this policy. Derivative instruments entered into for trading purposes are presented in the consolidated statements of income as electric revenues, net of any sharing with customers. These activities are not intended to mitigate commodity price risk associated with regulated electric and natural gas operations. Sharing of these margins is determined through state regulatory proceedings as well as the operation of the FERC-approved joint operating agreement. Commodity Derivatives — Xcel Energy enters into derivative instruments to manage variability of future cash flows from changes in commodity prices in its electric and natural gas operations. This could include the purchase or sale of energy or energy-related products, natural gas to generate electric energy, natural gas for resale and FTRs. The most significant derivative positions outstanding at December 31, 2022 and 2021 for this purpose relate to FTR instruments administered by MISO and SPP. These instruments are intended to offset the impacts of transmission system congestion. Higher congestion costs in recent years have led to an increase in the fair value of FTRs. Settlements of FTRs are shared with electric customers through fuel and purchased energy cost-recovery mechanisms. When Xcel Energy enters into derivative instruments that mitigate commodity price risk on behalf of electric and natural gas customers, the instruments are not typically designated as qualifying hedging transactions. The classification of unrealized losses or gains on these instruments as a regulatory asset or liability, if applicable, is based on approved regulatory recovery mechanisms. As of Dec. 31, 2022, Xcel Energy had no commodity contracts designated as cash flow hedges. Gross notional amounts of commodity forwards, options and FTRs:
(a)Not reflective of net positions in the underlying commodities. (b)Notional amounts for options included on a gross basis but weighted for the probability of exercise. Consideration of Credit Risk and Concentrations — Xcel Energy continuously monitors the creditworthiness of counterparties to its interest rate derivatives and commodity derivative contracts prior to settlement and assesses each counterparty’s ability to perform on the transactions set forth in the contracts. Impact of credit risk was immaterial to the fair value of unsettled commodity derivatives presented on the consolidated balance sheets. Xcel Energy’s utility subsidiaries’ most significant concentrations of credit risk with particular entities or industries are contracts with counterparties to their wholesale, trading and non-trading commodity activities. As of Dec. 31, 2022, four of Xcel Energy’s ten most significant counterparties for these activities, comprising $75 million or 37% of this credit exposure, had investment grade credit ratings from S&P Global Ratings, Moody’s Investor Services or Fitch Ratings. Four of the ten most significant counterparties, comprising $63 million or 32% of this credit exposure, were not rated by these external ratings agencies, but based on Xcel Energy’s internal analysis, had credit quality consistent with investment grade. Two of these significant counterparties, comprising $62 million or 31% of this credit exposure, had credit quality less than investment grade, based on internal analysis. Six of these significant counterparties are municipal or cooperative electric entities, RTOs or other utilities. Credit Related Contingent Features — Contract provisions for derivative instruments that the utility subsidiaries enter, including those accounted for as normal purchase and normal sale contracts and therefore not reflected on the consolidated balance sheets, may require the posting of collateral or settlement of the contracts for various reasons, including if the applicable utility subsidiary’s credit ratings are downgraded below its investment grade credit rating by any of the major credit rating agencies. As of Dec. 31, 2022 and 2021, there were $4 million and $3 million, respectively, of derivative liabilities with such underlying contract provisions, respectively. Certain contracts also contain cross default provisions that may require the posting of collateral or settlement of the contracts if there was a failure under other financing arrangements related to payment terms or other covenants. As of Dec. 31, 2022 and 2021, there were approximately $76 million and $64 million of derivative liabilities with such underlying contract provisions, respectively. Certain derivative instruments are also subject to contract provisions that contain adequate assurance clauses. These provisions allow counterparties to seek performance assurance, including cash collateral, in the event that a given utility subsidiary’s ability to fulfill its contractual obligations is reasonably expected to be impaired. Xcel Energy had no collateral posted related to adequate assurance clauses in derivative contracts as of Dec. 31, 2022 and 2021. Recurring Derivative Fair Value Measurements Impact of derivative activity:
(a)Recorded to interest charges. (b)Recorded to electric revenues. Presented amounts do not reflect non-derivative transactions or margin sharing with customers. (c)Recorded to electric fuel and purchased power. These derivative settlement gains and losses are shared with electric customers through fuel and purchased energy cost-recovery mechanisms and reclassified out of income as regulatory assets or liabilities, as appropriate. FTR settlements are shared with customers and do not have a material impact on net income. Presented amounts reflect changes in fair value between auction and settlement dates, but exclude the original auction fair value. (d)Recorded to cost of natural gas sold and transported. These losses are subject to cost-recovery mechanisms and reclassified out of income to a regulatory asset, as appropriate. (e)Relates primarily to option premium amortization. Xcel Energy had no derivative instruments designated as fair value hedges during the years ended Dec. 31, 2022, 2021 and 2020. Derivative assets and liabilities measured at fair value on a recurring basis were as follows:
(a)Xcel Energy nets derivative instruments and related collateral on its consolidated balance sheets when supported by a legally enforceable master netting agreement. At Dec. 31, 2022 and 2021, derivative assets and liabilities include no obligations to return cash collateral. At Dec. 31, 2022 and 2021, derivative assets and liabilities include rights to reclaim cash collateral of $53 million and $30 million, respectively. Counterparty netting amounts presented exclude settlement receivables and payables and non-derivative amounts that may be subject to the same master netting agreements. (b)Xcel Energy currently applies the normal purchase exception to qualifying PPAs. Balance relates to specific contracts that were previously recognized at fair value prior to applying the normal purchase exception, and are being amortized over the remaining contract lives along with the offsetting regulatory assets and liabilities. Changes in Level 3 commodity derivatives:
(a)Relates primarily to NSP-Minnesota and SPS FTR instruments administered by MISO and SPP. (b)Relates to commodity trading and is subject to substantial offsetting losses and gains on derivative instruments categorized as levels 1 and 2 in the income statement. See above tables for the income statement impact of derivative activity, including commodity trading gains and losses. Fair Value of Long-Term Debt As of Dec. 31, other financial instruments for which the carrying amount did not equal fair value:
Fair value of Xcel Energy’s long-term debt is estimated based on recent trades and observable spreads from benchmark interest rates for similar securities. Fair value estimates are based on information available to management as of Dec. 31, 2022 and 2021, and given the observability of the inputs, fair values presented for long-term debt were assigned as Level 2.
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Benefit Plans and Other Postretirement Benefits |
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| Retirement Benefits [Abstract] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Pension and Other Postretirement Benefits Disclosure [Text Block] |
Pension and Postretirement Health Care Benefits Xcel Energy has several noncontributory, qualified, defined benefit pension plans that cover almost all employees. All newly hired or rehired employees participate under the Cash Balance formula, which is based on pay credits using a percentage of annual eligible pay and annual interest credits. The average annual interest crediting rates for these plans was 4.89, 2.03 and 1.89% in 2022, 2021, and 2020, respectively. Some employees may participate under legacy formulas such as the traditional final average pay or pension equity. Xcel Energy’s policy is to fully fund into an external trust the actuarially determined pension costs subject to the limitations of applicable employee benefit and tax laws. In addition to the qualified pension plans, Xcel Energy maintains a SERP and a nonqualified pension plan. The SERP is maintained for certain executives who participated in the plan in 2008, when the SERP was closed to new participants. The nonqualified pension plan provides benefits for compensation that is in excess of the limits applicable to the qualified pension plans, with distributions funded by Xcel Energy’s consolidated operating cash flows. Obligations of the SERP and nonqualified plan as of Dec. 31, 2022 and 2021 were $11 million and $43 million, respectively. Xcel Energy recognized net benefit cost for the SERP and nonqualified plans of $17 million in 2022 and $4 million in 2021. Xcel Energy’s investment-return assumption considers the expected long-term performance for each of the asset classes in its pension and postretirement health care portfolio. Xcel Energy considers the historical returns achieved by its asset portfolios over long time periods, as well as the long-term projected return levels from investment experts. Pension cost determination assumes a forecasted mix of investment types over the long-term. •Investment returns in 2022 were below the assumed level of 6.49%. •Investment returns in 2021 were above the assumed level of 6.49%. •Investment returns in 2020 were above the assumed level of 6.87%. •In 2023, expected investment-return assumption is 6.93%. Pension plan and postretirement benefit assets are invested in a portfolio according to Xcel Energy’s return, liquidity and diversification objectives to provide a source of funding for plan obligations and minimize contributions to the plan, within appropriate levels of risk. The principal mechanism for achieving these objectives is the asset allocation given the long-term risk, return, correlation and liquidity characteristics of each particular asset class. There were no significant concentrations of risk in any industry, index, or entity. Market volatility can impact even well-diversified portfolios and significantly affect the return levels achieved by the assets in any year. State agencies also have issued guidelines to the funding of postretirement benefit costs. SPS is required to fund postretirement benefit costs for Texas and New Mexico amounts collected in rates. PSCo is required to fund postretirement benefit costs in irrevocable external trusts that are dedicated to the payment of these postretirement benefits. These assets are invested in a manner consistent with the investment strategy for the pension plan. Xcel Energy’s ongoing investment strategy is based on plan-specific investment recommendations that seek to minimize potential investment and interest rate risk as a plan’s funded status increases over time. The investment recommendations consider many factors and generally result in a greater percentage of long-duration fixed income securities being allocated to specific plans having relatively higher funded status ratios and a greater percentage of growth assets being allocated to plans having relatively lower funded status ratios. Plan Assets For each of the fair value hierarchy levels, Xcel Energy’s pension plan assets measured at fair value:
(a)See Note 10 for further information regarding fair value measurement inputs and methods. For each of the fair value hierarchy levels, Xcel Energy’s postretirement benefit plan assets that were measured at fair value:
(a)See Note 10 for further information on fair value measurement inputs and methods. Immaterial assets were transferred in or out of Level 3 for 2022. No assets were transferred in or out of Level 3 for 2021. Funded Status — Benefit obligations for both pension and postretirement plans decreased from Dec. 31, 2021 to Dec. 31, 2022, due primarily to benefit payments and increases in discount rates used in actuarial valuations. Comparisons of the actuarially computed benefit obligation, changes in plan assets and funded status of the pension and postretirement health care plans for Xcel Energy are as follows:
(a)Includes approximately $195 million in 2022 and $197 million in 2021 of lump-sum benefit payments used in the determination of a settlement charge.
Accumulated benefit obligation for the pension plan was $2,672 million and $3,469 million as of Dec. 31, 2022 and 2021, respectively. Net Periodic Benefit Cost (Credit) — Net periodic benefit cost (credit), other than the service cost component, is included in other income (expense) in the consolidated statements of income. Components of net periodic benefit cost (credit) and amounts recognized in other comprehensive income and regulatory assets and liabilities:
(a)A settlement charge is required when the amount of all lump-sum distributions during the year is greater than the sum of the service and interest cost components of the annual net periodic pension cost. In 2022 and 2021, as a result of lump-sum distributions during each plan year, Xcel Energy recorded a total pension settlement charge of $71 million and $59 million, respectively, the majority of which was not recognized due to the effects of regulation. A total of $9 million and $7 million was recorded in the consolidated statements of income in 2022 and 2021, respectively. There were no settlement charges recorded for the qualified pension plans in 2020.
Cash Flows — Funding requirements can be impacted by changes to actuarial assumptions, actual asset levels and other calculations prescribed by the requirements of income tax and other pension-related regulations. Required contributions were made in 2020 - 2023 to meet minimum funding requirements. Voluntary and required pension funding contributions: •$50 million in January 2023. •$50 million in 2022. •$131 million in 2021. •$150 million in 2020. The postretirement health care plans have no funding requirements other than fulfilling benefit payment obligations when claims are presented and approved. Additional cash funding requirements are prescribed by certain state and federal rate regulatory authorities. Voluntary postretirement funding contributions: •$12 million expected during 2023. •$13 million during 2022. •$15 million during 2021. •$11 million during 2020. Targeted asset allocations:
The asset allocations above reflect target allocations approved in the calendar year to take effect in the subsequent year. Plan Amendments — There were no significant plan amendments made in 2022 or 2020 which affected the postretirement benefit obligation. In 2021, Xcel Energy amended the Xcel Energy Pension Plan and Xcel Energy Inc. Nonbargaining Pension Plan (South) to reduce supplemental benefits for non-bargaining participants as well as to allow the transfer of a portion of non-qualified pension obligations into the qualified plans. Projected Benefit Payments Xcel Energy’s projected benefit payments:
Defined Contribution Plans Xcel Energy maintains 401(k) and other defined contribution plans that cover most employees. Total expense to these plans was approximately $46 million in 2022, $43 million in 2021 and $42 million in 2020. Multiemployer Plans NSP-Minnesota and NSP-Wisconsin each contribute to several union multiemployer pension and other postretirement benefit plans, none of which are individually significant. These plans provide pension and postretirement health care benefits to certain union employees who may perform services for multiple employers and do not participate in the NSP-Minnesota and NSP-Wisconsin sponsored pension and postretirement health care plans. Contributing to these types of plans creates risk that differs from providing benefits under NSP-Minnesota and NSP-Wisconsin sponsored plans, in that if another participating employer ceases to contribute to a multiemployer plan, additional unfunded obligations may need to be funded over time by remaining participating employers.
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Commitments and Contingencies |
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| Commitments and Contingencies Disclosure [Abstract] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Commitments and Contingencies | Legal Xcel Energy is involved in various litigation matters in the ordinary course of business. The assessment of whether a loss is probable or is a reasonable possibility, and whether the loss or a range of loss is estimable, often involves a series of complex judgments about future events. Management maintains accruals for losses probable of being incurred and subject to reasonable estimation. Management is sometimes unable to estimate an amount or range of a reasonably possible loss in certain situations, including but not limited to when (1) the damages sought are indeterminate, (2) the proceedings are in the early stages, or (3) the matters involve novel or unsettled legal theories. In such cases, there is considerable uncertainty regarding the timing or ultimate resolution, including a possible eventual loss. For current proceedings not specifically reported herein, management does not anticipate that the ultimate liabilities, if any, would have a material effect on Xcel Energy’s consolidated financial statements. Legal fees are generally expensed as incurred. Gas Trading Litigation — e prime is a wholly owned subsidiary of Xcel Energy. e prime was in the business of natural gas trading and marketing but has not engaged in natural gas trading or marketing activities since 2003. Multiple lawsuits involving multiple plaintiffs seeking monetary damages were commenced against e prime and its affiliates, including Xcel Energy, between 2003 and 2009 alleging fraud and anticompetitive activities in conspiring to restrain the trade of natural gas and manipulate natural gas prices. Cases were all consolidated in the U.S. District Court in Nevada. One case remains active which includes a multi-district litigation matter consisting of a Wisconsin purported class (Arandell Corp.). The Court issued a ruling on June 30, 2022 granting plaintiffs’ class certification. Defendants will work together to prepare and file a petition appealing the class certification ruling to the Seventh Circuit. Xcel Energy has concluded that a loss is remote for the remaining lawsuit. Comanche Unit 3 Litigation — In 2021, CORE filed a lawsuit in Denver County District Court, alleging PSCo breached ownership agreement terms by failing to operate Comanche Unit 3 in accordance with prudent utility practices. In January 2022, the Court granted PSCo’s motion to dismiss CORE’s claims for unjust enrichment, declaratory judgment and damages for replacement power costs. In April 2022, CORE filed a supplement to include the January 2022 outage and damages related to this event. Also in 2022, CORE sent notice of withdrawal from the ownership agreement based on the same alleged breaches. In February 2023, CORE disclosed its expert witness, who estimated damages incurred of $270 million. Also in February 2023, the court granted PSCo’s motion precluding CORE from seeking damages related to its withdrawal as part of the lawsuit. PSCo continues to believe CORE's claims are without merit and disputes CORE’s right to withdraw. Rate Matters and Other Xcel Energy’s operating subsidiaries are involved in various regulatory proceedings arising in the ordinary course of business. Until resolution, typically in the form of a rate order, uncertainties may exist regarding the ultimate rate treatment for certain activities and transactions. Amounts have been recognized for probable and reasonably estimable losses that may result. Unless otherwise disclosed, any reasonably possible range of loss in excess of any recognized amount is not expected to have a material effect on the consolidated financial statements. Sherco — In 2018, NSP-Minnesota and Southern Minnesota Municipal Power Agency (Co-owner of Sherco Unit 3) reached a settlement with GE related to a 2011 incident, which damaged the turbine at Sherco Unit 3 and resulted in an extended outage for repair. NSP-Minnesota notified the MPUC of its proposal to refund settlement proceeds to customers through the fuel clause adjustment. In March 2019, the MPUC approved NSP-Minnesota’s settlement refund proposal. Additionally, the MPUC decided to withhold any decision as to NSP-Minnesota’s prudence in connection with the incident at Sherco Unit 3 until after conclusion of an appeal pending between GE and NSP-Minnesota’s insurers. In February 2020, the Minnesota Court of Appeals affirmed the district court’s judgment in favor of GE. In March 2020, NSP-Minnesota’s insurers filed a petition seeking additional review by the Minnesota Supreme Court. In April 2020, the Minnesota Supreme Court denied the insurers’ petition for further review, ending the litigation. In January 2021, the Minnesota Office of the Attorney General and DOC recommended that NSP-Minnesota refund approximately $17 million of replacement power costs previously recovered through the fuel clause adjustment. NSP-Minnesota subsequently filed its response, asserting that it acted prudently in connection with the Sherco Unit 3 outage, the MPUC has previously disallowed $22 million of related costs and no additional refund or disallowance is appropriate. A final decision by the MPUC is expected in mid-2024. A loss related to this matter is deemed remote. MISO ROE Complaints — In November 2013 and February 2015, customer groups filed two ROE complaints against MISO TOs, which includes NSP-Minnesota and NSP-Wisconsin. The first complaint requested a reduction in base ROE transmission formula rates from 12.38% to 9.15% for the time period of Nov. 12, 2013 to Feb. 11, 2015, and removal of ROE adders (including those for RTO membership). The second complaint requested, for a subsequent time period, a base ROE reduction from 12.38% to 8.67%. The FERC subsequently issued various related orders (including Opinion Nos. 569, 569A and 569B) related to ROE methodology/calculations and timing. NSP-Minnesota has processed refunds to customers for applicable complaint periods based on the ROE in the most recent applicable opinions. The MISO TOs and various other parties have filed petitions for review of the FERC’s most recent applicable opinions at the D.C. Circuit. In August 2022, the D.C. Circuit ruled that FERC had not adequately supported its conclusions, vacated FERC’s related orders and remanded the issue back to FERC for further proceedings, which remain pending. Additional exposure, if any related to this matter is expected to be immaterial. SPP OATT Upgrade Costs — Costs of transmission upgrades may be recovered from other SPP customers whose transmission service depends on capacity enabled by the upgrade under the SPP OATT. SPP had not been charging its customers for these upgrades, even though the SPP OATT had allowed SPP to do so since 2008. In 2016, the FERC granted SPP’s request to recover these previously unbilled charges and SPP subsequently billed SPS approximately $13 million. In 2018, SPS’ appeal to the D.C. Circuit over the FERC rulings granting SPP the right to recover previously unbilled charges was remanded to the FERC. In 2019, the FERC reversed its 2016 decision and ordered SPP to refund charges retroactively collected from its transmission customers, including SPS, related to periods before September 2015. In 2020, SPP and Oklahoma Gas & Electric separately filed petitions for review of the FERC’s orders at the D.C. Circuit. In 2021, the D.C. Circuit issued a decision denying these appeals and upholding the FERC’s orders. Refunds received by SPS are expected to be given back to SPS customers through future rates. In 2017, SPS filed a separate related complaint asserting SPP assessed upgrade charges to SPS in violation of the SPP OATT. In 2018, the FERC issued an order denying the SPS complaint. SPS filed a request for rehearing in 2018. The FERC subsequently issued a tolling order granting a rehearing for further consideration. If SPS’ complaint results in additional charges or refunds, SPS will seek to recover or refund the amount through future SPS customer rates. In 2020, SPS filed a petition for review of the FERC’s 2018 orders at the D.C. Circuit. In February 2022, FERC issued an order rejecting SPS’ request for hearing. SPS has appealed that order. That appeal has been combined with SPS’ prior appeal. Wind Operating Commitments — PUCT and NMPRC orders related to the Hale and Sagamore wind projects included certain operating and savings minimums. In general, annual generation must exceed a net capacity factor of 48%. If annual generation is below the guaranteed level, SPS would be obligated to refund an amount equal to foregone PTCs and fuel savings. Additionally, retail customer savings must exceed project costs included in base rates over the first ten years of operations. SPS would be required to refund excess costs, if any, after ten years of operations. As of Dec. 31, 2022, the full-year net capacity factor exceeded the guaranteed level, resulting in no refund liability for 2022. Environmental New and changing federal and state environmental mandates can create financial liabilities for Xcel Energy, which are normally recovered through the regulated rate process. Site Remediation Various federal and state environmental laws impose liability where hazardous substances or other regulated materials have been released to the environment. Xcel Energy Inc.’s subsidiaries may sometimes pay all or a portion of the cost to remediate sites where past activities of their predecessors or other parties have caused environmental contamination. Environmental contingencies could arise from various situations, including sites of former MGPs; and third-party sites, such as landfills, for which one or more of Xcel Energy Inc.’s subsidiaries are alleged to have sent wastes to that site. Historical MGP, Landfill and Disposal Sites Xcel Energy is currently investigating, remediating or performing post-closure actions at 9 historical MGP, landfill or other disposal sites across its service territories, excluding sites that are being addressed under current coal ash regulations (see below). Xcel Energy has recognized its best estimate of costs/liabilities from final resolution of these issues; however, the outcome and timing are unknown. In addition, there may be insurance recovery and/or recovery from other potentially responsible parties, offsetting a portion of costs incurred. Environmental Requirements — Water and Waste Coal Ash Regulation — Xcel Energy’s operations are subject to federal and state regulations that impose requirements for handling, storage, treatment and disposal of solid waste. Under the CCR Rule, utilities are required to complete groundwater sampling around their applicable landfills and surface impoundments as well as perform corrective actions where offsite groundwater has been impacted. As of Dec. 31, 2022, Xcel Energy had eight regulated ash units in operation. PSCo is currently exploring an agreement with a third party that would excavate and process ash for beneficial use (at two sites) and perform restoration at one site at a cost of approximately $45 million. An estimated liability has been recorded and amounts are expected to be fully recoverable through regulatory mechanisms. Investigation and feasibility studies for additional corrective action related to offsite groundwater are ongoing (three sites). While the results are uncertain, additional costs are estimated to be up to $35 million. A liability has been recorded for the portion estimable/probable and are expected to be fully recoverable through regulatory mechanisms. Federal Clean Water Act Section 316(b) — The Federal Clean Water Act requires the EPA to regulate cooling water intake structures to assure they reflect the best technology available for minimizing impingement and entrainment of aquatic species. Estimated capital expenditures of approximately $45 million may be required for NSP-Minnesota to comply with the requirements pending approval of mitigation plans from the MPCA. Xcel Energy anticipates these costs will be recoverable through regulatory mechanisms. Environmental Requirements — Air Reasonable Progress Rule and BART — In 2016, the EPA adopted a final rule establishing a federal implementation plan for reasonable further progress under the regional haze program for the state of Texas. The rule imposes SO2 emission limitations which would require the installation of dry scrubbers on Tolk Units 1 and 2; compliance would have been required by February 2021. SPS appealed the EPA’s decision and obtained a stay of the final rule. In 2017, the EPA adopted a final BART rule for Texas. Under that rule, Harrington Units 1, 2, and 3 and Tolk Units 1 and 2 participate in intrastate SO2 budget and trading program. The rule also implemented participation in a federal ozone season NOx budget and trading program, named the Cross State Air Pollution Rule. The EPA is reconsidering this rule. AROs — AROs have been recorded for Xcel Energy’s assets. For nuclear assets, the ARO is associated with the decommissioning of NSP-Minnesota nuclear generating plants. Aggregate fair value of NSP-Minnesota’s legally restricted assets, for funding future nuclear decommissioning was $2.9 billion and $3.3 billion for 2022 and 2021, respectively. Xcel Energy’s AROs were as follows:
(a)Amounts incurred related to the wind farms placed in service in 2022 for NSP-Minnesota (Dakota Range and Rock Aetna) and steam production pond remediation costs for PSCo. (b)In 2022, AROs were revised for changes in timing and estimates of cash flows. Revisions in steam, hydro and other production AROs were primarily related to changes in cost estimates for remediation of ash containment facilities. Changes in gas transmission and distribution AROs were primarily related to changes in labor rates coupled with increased gas line mileage and number of services.
(a)Amounts incurred related to the wind farms placed in service in 2021 for NSP-Minnesota (Blazing Star 2, Mower and Freeborn) and removal of a utility scale battery asset in NSP-Minnesota. (b)In 2021, AROs were revised for changes in timing and estimates of cash flows. Revisions in steam, hydro and other production AROs were primarily related to changes in cost estimates for remediation of ash containment facilities. Changes in gas transmission and distribution AROs were primarily related to changes in labor rates coupled with increased gas line mileage and number of services. Indeterminate AROs — Outside of the recorded asbestos AROs, other plants or buildings may contain asbestos due to the age of many of Xcel Energy’s facilities, but no confirmation or measurement of the cost of removal could be determined as of Dec. 31, 2022. Therefore, an ARO was not recorded for these facilities. Nuclear Nuclear Insurance — NSP-Minnesota’s public liability for claims from any nuclear incident is limited to $13.7 billion under the Price-Anderson amendment to the Atomic Energy Act. NSP-Minnesota has $450 million of coverage for its public liability exposure with a pool of insurance companies. The remaining $13.2 billion of exposure is funded by the Secondary Financial Protection Program available from assessments by the federal government. NSP-Minnesota is subject to assessments of up to $138 million per reactor-incident for each of its three reactors, for public liability arising from a nuclear incident at any licensed nuclear facility in the United States. The maximum funding requirement is $20 million per reactor-incident during any one year. Maximum assessments are subject to inflation adjustments. NSP-Minnesota purchases insurance for property damage and site decontamination cleanup costs from NEIL and EMANI. The coverage limits are $2.8 billion for each of NSP-Minnesota’s two nuclear plant sites. NEIL also provides business interruption insurance coverage up to $350 million, including the cost of replacement power during prolonged accidental outages of nuclear generating units. Premiums are expensed over the policy term. All companies insured with NEIL are subject to retroactive premium adjustments if losses exceed accumulated reserve funds. Capital has been accumulated in the reserve funds of NEIL and EMANI to the extent that NSP-Minnesota would have no exposure for retroactive premium assessments in case of a single incident under the business interruption and the property damage insurance coverage. NSP-Minnesota could be subject to annual maximum assessments of $12 million for business interruption insurance and $32 million for property damage insurance if losses exceed accumulated reserve funds.Nuclear Fuel Disposal — NSP-Minnesota is responsible for temporarily storing spent nuclear fuel from its nuclear plants. The DOE is responsible for permanently storing spent fuel from U.S. nuclear plants, but no such facility is yet available. NSP-Minnesota owns temporary on-site storage facilities for spent fuel at its Monticello and PI nuclear plants, which consist of storage pools and dry cask facilities. The Monticello dry-cask storage facility currently stores all 30 of the authorized canisters. The PI dry-cask storage facility currently stores 50 of the 64 authorized casks. Monticello’s future spent fuel will continue to be placed in its spent fuel pool. The decommissioning plan addresses the disposition of spent fuel at the end of the licensed life. A CON for additional storage at the Monticello site has been filed with the MPUC, to support possible life extension to 2040. NSP-Minnesota expects a decision by year-end 2023. Regulatory Plant Decommissioning Recovery — Decommissioning activities for NSP-Minnesota’s nuclear facilities are planned to begin at the end of each unit’s authorized retirement dates, which can be different than the currently approved NRC operating licenses. These decommissioning activities are planned to be completed at both facilities by 2101. NSP-Minnesota’s current operating licenses allow continued use of its Monticello nuclear plant until 2030 and its PI nuclear plant until 2033 for Unit 1 and 2034 for Unit 2. The MPUC reaffirmed a 60-year DECON scenario, where Monticello continues operations under a 10-year license extension (approved in August 2022). NRC approval of the extension is pending. Future decommissioning costs of nuclear facilities are estimated through triennial periodic studies that assess the costs and timing of planned nuclear decommissioning activities for each unit. The 2020 nuclear decommissioning filing was approved by the MPUC and became effective in 2022. Obligations for decommissioning are expected to be funded 100% by the external decommissioning trust fund. NSP-Minnesota had $2.9 billion and $3.3 billion of assets held in external decommissioning trusts at Dec. 31, 2022, and 2021, respectively. See Note 10 to the consolidated financial statements for additional discussion. Leases Xcel Energy evaluates contracts that may contain leases, including PPAs and arrangements for the use of office space and other facilities, vehicles and equipment. A contract contains a lease if it conveys the exclusive right to control the use of a specific asset. A contract determined to contain a lease is evaluated further to determine if the arrangement is a finance lease. ROU assets represent Xcel Energy's rights to use leased assets. The present value of future operating lease payments is recognized in other current liabilities and noncurrent operating lease liabilities. These amounts, adjusted for any prepayments or incentives, are recognized as operating lease ROU assets. Most of Xcel Energy’s leases do not contain a readily determinable discount rate. Therefore, the present value of future lease payments is generally calculated using the applicable Xcel Energy subsidiary’s estimated incremental borrowing rate (weighted average of 4.1%). Xcel Energy has elected the practical expedient under which non-lease components, such as asset maintenance costs included in payments, are not deducted from minimum lease payments for the purposes of lease accounting and disclosure. Leases with an initial term of 12 months or less are classified as short-term leases and are not recognized on the consolidated balance sheet. Operating lease ROU assets:
ROU assets for finance leases are included in other noncurrent assets, and the present value of future finance lease payments is included in other current liabilities and other noncurrent liabilities. Xcel Energy’s most significant finance lease activities are related to WYCO, a joint venture with CIG, to develop and lease natural gas pipeline, storage and compression facilities. Xcel Energy Inc. has a 50% ownership interest in WYCO. WYCO leases its facilities to CIG, and CIG operates the facilities, providing natural gas storage and transportation services to PSCo under separate service agreements. PSCo accounts for its Totem natural gas storage service and Front Range pipeline arrangements with CIG and WYCO, respectively, as finance leases. Xcel Energy Inc. eliminates 50% of the finance lease obligation related to WYCO in the consolidated balance sheet along with an equal amount of Xcel Energy Inc.’s equity investment in WYCO. Finance lease ROU assets:
Components of lease expense:
(a)Includes short-term lease expense of $6 million for 2022 and $5 million for 2021 and 2020. (b)PPA capacity payments are included in electric fuel and purchased power on the consolidated statements of income. Expense for other operating leases is included in O&M expense and electric fuel and purchased power. Commitments under operating and finance leases as of Dec. 31, 2022:
(a)Amounts do not include PPAs accounted for as executory contracts and/or contingent payments, such as energy payments on renewable PPAs. (b)PPA operating leases contractually expire at various dates through 2033. (c)Excludes certain amounts related to Xcel Energy’s 50% ownership interest in WYCO. PPAs and Fuel Contracts Non-Lease PPAs — NSP-Minnesota, PSCo and SPS have entered into PPAs with other utilities and energy suppliers for purchased power to meet system load and energy requirements, operating reserve obligations and as part of wholesale and commodity trading activities. In general, these agreements provide for energy payments, based on actual energy delivered and capacity payments. Certain PPAs, accounted for as executory contracts with various expiration dates through 2033, contain minimum energy purchase commitments. Total energy payments on those contracts were $182 million, $149 million and $112 million in 2022, 2021 and 2020, respectively. Included in electric fuel and purchased power expenses for PPAs accounted for as executory contracts were payments for capacity of $75 million, $69 million and $75 million in 2022, 2021 and 2020, respectively. Capacity and energy payments are contingent on the IPPs meeting contract obligations, including plant availability requirements. Certain contractual payments are adjusted based on market indices. The effects of price adjustments on financial results are mitigated through purchased energy cost recovery mechanisms. At Dec. 31, 2022, the estimated future payments for capacity and energy that the utility subsidiaries of Xcel Energy are obligated to purchase pursuant to these executory contracts, subject to availability, were as follows:
(a)Excludes contingent energy payments for renewable energy PPAs. Fuel Contracts — Xcel Energy has entered into various long-term commitments for the purchase and delivery of a significant portion of its coal, nuclear fuel and natural gas requirements. These contracts expire between 2023 and 2060. Xcel Energy is required to pay additional amounts depending on actual quantities shipped under these agreements. Estimated minimum purchases under these contracts as of Dec. 31, 2022:
VIEs PPAs — Under certain PPAs, NSP-Minnesota, PSCo and SPS purchase power from IPPs for which the utility subsidiaries are required to reimburse fuel costs, or to participate in tolling arrangements under which the utility subsidiaries procure the natural gas required to produce the energy that they purchase. Xcel Energy has determined that certain IPPs are VIEs, however it is not subject to risk of loss from the operations of these entities, and no significant financial support is required other than contractual payments for energy and capacity. In addition, certain solar PPAs provide an option to purchase emission allowances or sharing provisions related to production credits generated by the solar facility under contract. These specific PPAs create a variable interest in the IPP. Xcel Energy evaluated each of these VIEs for possible consolidation, including review of qualitative factors such as the length and terms of the contract, control over O&M, control over dispatch of electricity, historical and estimated future fuel and electricity prices, and financing activities. Xcel Energy concluded that these entities are not required to be consolidated in its consolidated financial statements because it does not have the power to direct the activities that most significantly impact the entities’ economic performance. The utility subsidiaries had approximately 3,961 MW and 4,062 MW of capacity under these long-term PPAs at Dec. 31, 2022 and 2021, respectively, with entities that have been determined to be VIEs. These agreements have expiration dates through 2041. Fuel Contracts — SPS purchases all of its coal requirements for its Harrington and Tolk plants from TUCO Inc. under contracts that will expire in December 2024 and December 2027, respectively. TUCO arranges for the purchase, receiving, transporting, unloading, handling, crushing, weighing and delivery of coal to meet SPS’ requirements. TUCO is responsible for negotiating and administering contracts with coal suppliers, transporters and handlers. SPS has not provided any significant financial support to TUCO, other than contractual payments for delivered coal. However, the fuel contracts create a variable interest in TUCO due to SPS’ reimbursement of fuel procurement costs. SPS has determined that TUCO is a VIE, however it has concluded that SPS is not the primary beneficiary because it does not have the power to direct the activities that most significantly impact TUCO’s economic performance. Low-Income Housing Limited Partnerships — Eloigne and NSP-Wisconsin have entered into limited partnerships with affordable rental housing activities that qualify for low-income housing tax credits. Eloigne and NSP-Wisconsin, as primary beneficiaries of these activities, consolidate these limited partnerships in their consolidated financial statements. Amounts reflected in Xcel Energy’s consolidated balance sheets for these investments include $44 million of assets and $35 million of liabilities at Dec. 31, 2022, and $45 million of assets and $35 million of liabilities at Dec. 31, 2021. Other Technology Agreements — Xcel Energy has several contracts for information technology services that extend through 2027. The contracts are cancelable, although there are financial penalties for early termination. Xcel Energy capitalized or expensed $181 million, $103 million and $110 million associated with these vendors in 2022, 2021 and 2020, respectively. Committed minimum payments under these obligations as follows:
Guarantees and Bond Indemnifications — Xcel Energy Inc. and its subsidiaries provide guarantees and bond indemnities, which guarantee payment or performance. Xcel Energy Inc.’s exposure is based upon the net liability under the specified agreements or transactions. Most of the guarantees and bond indemnities issued by Xcel Energy Inc. and its subsidiaries have a stated maximum amount. As of Dec. 31, 2022 and 2021, Xcel Energy Inc. and its subsidiaries had no assets held as collateral related to their guarantees, bond indemnities and indemnification agreements. Guarantees and bond indemnities issued and outstanding for Xcel Energy were $62 million and $60 million at Dec. 31, 2022 and 2021 respectively. Other Indemnification Agreements — Xcel Energy Inc. and its subsidiaries provide indemnifications through various contracts. These are primarily indemnifications against adverse litigation outcomes in connection with underwriting agreements, as well as breaches of representations and warranties, including corporate existence, transaction authorization and income tax matters with respect to assets sold. Xcel Energy Inc.’s and its subsidiaries’ obligations under these agreements may be limited in terms of duration and amount. Maximum future payments under these indemnifications cannot be reasonably estimated as the dollar amounts are often not explicitly stated.
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Other Comprehensive Income |
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| Stockholders' Equity Note [Abstract] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Comprehensive Income (Loss) Note [Text Block] | Changes in accumulated other comprehensive loss, net of tax, for the years ended Dec. 31:
(a)Included in interest charges. (b)Included in the computation of net periodic pension and postretirement benefit costs. See Note 11 for further information.
(a)Included in interest charges. (b)Included in the computation of net periodic pension and postretirement benefit costs. See Note 11 for further information.
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Segments and Related Information |
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| Segment Reporting [Abstract] | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Segment Information | Xcel Energy evaluates performance by each utility subsidiary based on profit or loss generated from the product or service provided, including the regulated electric utility operating results of NSP-Minnesota, NSP-Wisconsin, PSCo and SPS, as well as the regulated natural gas utility operating results of NSP-Minnesota, NSP-Wisconsin and PSCo. These segments are managed separately because the revenue streams are dependent upon regulated rate recovery, which is separately determined for each segment. Xcel Energy has the following reportable segments: •Regulated Electric — The regulated electric utility segment generates, transmits and distributes electricity in Minnesota, Wisconsin, Michigan, North Dakota, South Dakota, Colorado, Texas and New Mexico. In addition, this segment includes sales for resale and provides wholesale transmission service to various entities in the United States. The regulated electric utility segment also includes wholesale commodity and trading operations. •Regulated Natural Gas — The regulated natural gas utility segment transports, stores and distributes natural gas primarily in portions of Minnesota, Wisconsin, North Dakota, Michigan and Colorado. Xcel Energy also presents All Other, which includes operating segments with revenues below the necessary quantitative thresholds. Those operating segments primarily include steam revenue, appliance repair services, non-utility real estate activities, revenues associated with processing solid waste into refuse-derived fuel, investments in rental housing projects that qualify for low-income housing tax credits and the operations of MEC until July 2020. Xcel Energy had equity method investments of $219 million and $208 million as of Dec. 31, 2022 and 2021, respectively, included in the natural gas utility and all other segments. Asset and capital expenditure information is not provided for Xcel Energy’s reportable segments. As an integrated electric and natural gas utility, Xcel Energy operates significant assets that are not dedicated to a specific business segment. Reporting assets and capital expenditures by business segment would require arbitrary and potentially misleading allocations, which may not necessarily reflect the assets that would be required for the operation of the business segments on a stand-alone basis. Certain costs, such as common depreciation, common O&M expenses and interest expense are allocated based on cost causation allocators across each segment. In addition, a general allocator is used for certain general and administrative expenses, including office supplies, rent, property insurance and general advertising. Xcel Energy’s segment information:
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Schedule I, Condensed Financial Statements of Xcel Energy Inc |
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| Condensed Financial Information Disclosure [Abstract] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Schedule I, Condensed Financial Information |
Notes to Condensed Financial Statements Incorporated by reference are Xcel Energy’s consolidated statements of common stockholders’ equity and other comprehensive income in Part II, Item 8. Basis of Presentation — The condensed financial information of Xcel Energy Inc. is presented to comply with Rule 12-04 of Regulation S-X. Xcel Energy Inc.’s investments in subsidiaries are presented under the equity method of accounting. Under this method, the assets and liabilities of subsidiaries are not consolidated. The investments in net assets of the subsidiaries are recorded in the balance sheets. The income from operations of the subsidiaries is reported on a net basis as equity in income of subsidiaries. As a holding company with no business operations, Xcel Energy Inc.’s assets consist primarily of investments in its utility subsidiaries. Xcel Energy Inc.’s material cash inflows are only from dividends and other payments received from its utility subsidiaries and the proceeds raised from the sale of debt and equity securities. The ability of its utility subsidiaries to make dividend and other payments is subject to the availability of funds after taking into account their respective funding requirements, the terms of their respective indebtedness, the regulations of the FERC under the Federal Power Act, and applicable state laws. Management does not expect maintaining these requirements to have an impact on Xcel Energy Inc.’s ability to pay dividends at the current level in the foreseeable future. Each of its utility subsidiaries, however, is legally distinct and has no obligation, contingent or otherwise, to make funds available to Xcel Energy Inc. Guarantees and Indemnifications Xcel Energy Inc. provides guarantees and bond indemnities under specified agreements or transactions, which guarantee payment or performance. Xcel Energy Inc.’s exposure is based upon the net liability of the relevant subsidiary under the specified agreements or transactions. Most of the guarantees and bond indemnities issued by Xcel Energy Inc. limit the exposure to a maximum stated amount. As of Dec. 31, 2022 and 2021, Xcel Energy Inc. had no assets held as collateral related to guarantees, bond indemnities and indemnification agreements. Guarantees and bond indemnities issued and outstanding as of Dec. 31, 2022:
(a)The guarantee expires the earlier of 2024 or full repayment of the loan. (b)Nonperformance and/or nonpayment. (c)The guarantee expires the earlier of termination or payment of all obligations under the purchase contract. (d)Given that the manufacturing of solar generating equipment has not yet commenced, related exposure to the payment obligations of Capital Services at Dec. 31, 2022 is immaterial. (e)The surety bonds primarily relate to workers compensation benefits and utility projects. The workers compensation bonds are renewed annually and the project based bonds expire in conjunction with the completion of the related projects. (f)Due to the magnitude of projects associated with the surety bonds, the total current exposure of this indemnification cannot be determined. Xcel Energy Inc. believes the exposure to be significantly less than the total amount of the outstanding bonds. (g)Per the indemnity agreement between Xcel Energy Inc. and the various surety companies, surety companies have the discretion to demand that collateral be posted. Indemnification Agreements Xcel Energy Inc. provides indemnifications through contracts entered into in the normal course of business. Indemnifications are primarily against adverse litigation outcomes in connection with underwriting agreements, breaches of representations and warranties, including corporate existence, transaction authorization and certain income tax matters. Obligations under these agreements may be limited in terms of duration or amount. Maximum future payments under these indemnifications cannot be reasonably estimated as the dollar amounts are often not explicitly stated. Related Party Transactions — Xcel Energy Inc. presents related party receivables net of payables. Accounts receivable net of payables with affiliates at Dec. 31:
Dividends — Cash dividends paid to Xcel Energy Inc. by its subsidiaries were $1,503 million, $1,344 million and $2,527 million for the years ended Dec. 31, 2022, 2021 and 2020, respectively. These cash receipts are included in operating cash flows of the condensed statements of cash flows. Money Pool — FERC approval was received to establish a utility money pool arrangement with the utility subsidiaries, subject to receipt of required state regulatory approvals. The utility money pool allows for short-term investments in and borrowings between the utility subsidiaries. Xcel Energy Inc. may make investments in the utility subsidiaries at market-based interest rates; however, the money pool arrangement does not allow the utility subsidiaries to make investments in Xcel Energy Inc. Money pool lending for Xcel Energy Inc.:
See notes to the consolidated financial statements in Part II, Item 8.
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Schedule II, Valuation and Qualifying Accounts |
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| SEC Schedule, 12-09, Valuation and Qualifying Accounts [Abstract] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Schedule II, Valuation and Qualifying Accounts | Xcel Energy Inc. and Subsidiaries Valuation and Qualifying Accounts Years Ended Dec. 31
(a)Recovery of amounts previously written-off. (b)Deductions related primarily to bad debt write-offs. (c)Primarily reductions to valuation allowances due to additional NOLs and tax credits forecasted to be used prior to expiration. (d)Primarily the reduction of valuation allowances for North Dakota ITC, net of federal income tax benefit, that is offset to a regulatory liability forecasted to be used prior to expiration along with valuation allowances that expired.
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Summary of Significant Accounting Policies Summary of Significant Accounting Policies (Policies) |
12 Months Ended | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Accounting Policies [Abstract] | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Business and System of Accounts | General — Xcel Energy Inc.’s utility subsidiaries are engaged in the regulated generation, purchase, transmission, distribution and sale of electricity and the regulated purchase, transportation, distribution and sale of natural gas. The consolidated financial statements are presented in accordance with GAAP. All of the utility subsidiaries’ underlying accounting records also conform to the FERC uniform system of accounts. Certain amounts in the consolidated financial statements or notes have been reclassified for comparative purposes; however, such reclassifications did not affect net income, total assets, liabilities, equity or cash flows.
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| Principles of Consolidation | Xcel Energy’s regulated operations include the activities of NSP-Minnesota, NSP-Wisconsin, PSCo and SPS. These utility subsidiaries serve electric and natural gas customers in portions of Colorado, Michigan, Minnesota, New Mexico, North Dakota, South Dakota, Texas and Wisconsin. Also included in regulated operations are WGI, an interstate natural gas pipeline company, and WYCO, a joint venture with CIG to develop and lease natural gas pipeline, storage and compression facilities. Xcel Energy Inc.’s nonregulated subsidiaries include:
Xcel Energy Inc. owns the following additional direct subsidiaries, some of which are intermediate holding companies with additional subsidiaries:
Xcel Energy and its subsidiaries collectively are referred to as Xcel Energy. Xcel Energy’s consolidated financial statements include its wholly-owned subsidiaries and VIEs for which it is the primary beneficiary. All intercompany transactions and balances are eliminated unless a different treatment is appropriate for rate regulated transactions. The equity method of accounting is used for its investments in EIP funds and WYCO. Investments in certain plants and transmission facilities are jointly owned with nonaffiliated utilities. A proportionate share of jointly owned facilities is recorded as property, plant and equipment on the consolidated balance sheets, and Xcel Energy’s share of operating costs associated with these facilities is included in the consolidated statements of income. The consolidated financial statements are presented in accordance with GAAP. All of the utility subsidiaries’ underlying accounting records also conform to the FERC uniform system of accounts. Certain amounts in the consolidated financial statements or notes have been reclassified for comparative purposes; however, such reclassifications did not affect net income, total assets, liabilities, equity or cash flows.
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| Subsequent Events | Xcel Energy has evaluated events occurring after Dec. 31, 2022 up to the date of issuance of these consolidated financial statements. These statements contain all necessary adjustments and disclosures resulting from that evaluation. | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Use of Estimates | Use of Estimates — Xcel Energy uses estimates based on the best information available in recording transactions and balances resulting from business operations. Estimates are used for items such as plant depreciable lives or potential disallowances, AROs, certain regulatory assets and liabilities, tax provisions, uncollectible amounts, environmental costs, unbilled revenues, jurisdictional fuel and energy cost allocations and actuarially determined benefit costs. Recorded estimates are revised when better information becomes available or actual amounts can be determined. Revisions can affect operating results.
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| Regulatory Accounting | Regulatory Accounting — The regulated utility subsidiaries account for income and expense items in accordance with accounting guidance for regulated operations. Under this guidance: •Certain costs, which would otherwise be charged to expense or other comprehensive income, are deferred as regulatory assets based on the expected ability to recover the costs in future rates. •Certain credits, which would otherwise be reflected as income or other comprehensive income, are deferred as regulatory liabilities based on the expectation the amounts will be returned to customers in future rates, or because the amounts were collected in rates prior to the costs being incurred. Estimates and assumptions for recovery of deferred costs and refund of deferred credits are based on specific ratemaking decisions, precedent or other information available. Regulatory assets and liabilities are amortized consistent with the treatment in the rate setting process. If changes in the regulatory environment occur, the utility subsidiaries may no longer be eligible to apply this accounting treatment and may be required to eliminate regulatory assets and liabilities. Such changes could have a material effect on Xcel Energy’s results of operations, financial condition and cash flows. See Note 4 for further information.
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| Income Taxes | Income Taxes — Xcel Energy accounts for income taxes using the asset and liability method, which requires recognition of deferred tax assets and liabilities for the expected future tax consequences of events that have been included in the financial statements. Income taxes are deferred for all temporary differences between pretax financial and taxable income and between the book and tax bases of assets and liabilities. Rates are utilized that are scheduled to be in effect when the temporary differences are expected to reverse. The effect of a change in tax rates on deferred tax assets and liabilities is recognized in the period that includes the enactment date. The effects of tax rate changes that are attributable to the utility subsidiaries are generally subject to a normalization method of accounting. Therefore, the revaluation of most of the utility subsidiaries’ net deferred taxes upon a tax rate reduction results in the establishment of a net regulatory liability, refundable to utility customers over the remaining life of the related assets. Xcel Energy anticipates that a tax rate increase would predominantly result in the establishment of a regulatory asset, subject to an evaluation of whether future recovery is expected. Reversal of certain temporary differences are accounted for as current income tax expense due to the effects of past regulatory practices when deferred taxes were not required to be recorded due to the use of flow through accounting for ratemaking purposes. Tax credits are recorded when earned unless there is a requirement to defer the benefit and amortize over the book depreciable lives of the related property. The requirement to defer and amortize these credits specifically applies to certain federal ITCs, as determined by tax regulations and Xcel Energy tax elections. For tax credits otherwise eligible to be recognized when earned, Xcel Energy considers the impact of rate regulation to determine if these credits and related adjustments should be deferred as regulatory assets or liabilities. Deferred tax assets are reduced by a valuation allowance if it is more likely than not that some portion or all of the deferred tax asset will not be realized. Utility rate regulation has resulted in the recognition of regulatory assets and liabilities related to income taxes. Xcel Energy measures and discloses uncertain tax positions that it has taken or expects to take in its income tax returns. A tax position is recognized in the consolidated financial statements when it is more likely than not that the position will be sustained upon examination based on the technical merits of the position. Recognition of changes in uncertain tax positions are reflected as a component of income tax expense. Interest and penalties related to income taxes are reported within other (expense) income or interest charges in the consolidated statements of income. Xcel Energy Inc. and its subsidiaries file consolidated federal income tax returns as well as consolidated or separate state income tax returns. Federal income taxes paid by Xcel Energy Inc. are allocated to its subsidiaries based on separate company computations. A similar allocation is made for state income taxes paid by Xcel Energy Inc. in connection with consolidated state filings. Xcel Energy Inc. also allocates its own income tax benefits to its direct subsidiaries. See Note 7 for further information.
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| Property, Plant and Equipment and Depreciation | Property, Plant and Equipment and Depreciation in Regulated Operations — Property, plant and equipment is stated at original cost. The cost of plant includes direct labor and materials, contracted work, overhead costs and AFUDC. The cost of plant retired is charged to accumulated depreciation and amortization. Amounts recovered in rates for future removal costs are recorded as regulatory liabilities. Significant additions or improvements extending asset lives are capitalized, while repairs and maintenance costs are charged to expense as incurred. Maintenance and replacement of items determined to be less than a unit of property are charged to operating expenses as incurred. Property, plant and equipment is tested for impairment when it is determined that the carrying value of the assets may not be recoverable. A loss is recognized in the current period if it becomes probable that part of a cost of a plant under construction or recently completed plant will be disallowed for recovery from customers and a reasonable estimate of the disallowance can be made. For investments in property, plant and equipment that are abandoned and not expected to go into service, incurred costs and related deferred tax amounts are compared to the discounted estimated future rate recovery, and a loss is recognized, if necessary. Depreciation expense is recorded using the straight-line method over the plant’s commission approved useful life. Actuarial life studies are performed and submitted to the state and federal commissions for review. Upon acceptance by the various commissions, the resulting lives and net salvage rates are used to calculate depreciation. Plant removal costs are typically recognized at the amounts recovered in rates as authorized by the applicable regulator. Accumulated removal costs are reflected in the consolidated balance sheet as a regulatory liability. Depreciation expense, expressed as a percentage of average depreciable property, was approximately 3.7% for 2022, 3.5% for 2021 and 3.4% for 2020.
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| Asset Retirement Obligations | AROs — Xcel Energy records AROs as a liability for the fair value of an ARO to be recognized in the period incurred (if it can be reasonably estimated), with the offsetting/associated costs capitalized as a long-lived asset. The liability is generally increased over time by applying the effective interest method of accretion and the capitalized costs are typically depreciated over the useful life of the long-lived asset. Changes resulting from revisions to timing or amounts of expected asset retirement cash flows are recognized as an increase or a decrease in the ARO. See Note 12 for further information.
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| Nuclear Decommissioning | Nuclear Decommissioning — Nuclear decommissioning studies that estimate NSP-Minnesota’s costs of decommissioning its nuclear power plants are normally performed at least every years and submitted to the state commissions for approval. Due to other regulatory activity, the next decommissioning study has been deferred one year until 2024. NSP-Minnesota recovers regulator-approved decommissioning costs of its nuclear power plants over each facility’s expected service life, typically based on the triennial decommissioning studies. The studies consider estimated future costs of decommissioning and the market value of investments in trust funds and recommend annual funding amounts. Amounts collected in rates are deposited in the trust funds. For financial reporting purposes, NSP-Minnesota accounts for nuclear decommissioning as an ARO. Restricted funds for the payment of future decommissioning expenditures for NSP-Minnesota’s nuclear facilities are included in nuclear decommissioning fund and other assets on the consolidated balance sheets. See Notes 10 and 12 for further information.
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| Benefit Plans and Other Postretirement Benefits | Benefit Plans and Other Postretirement Benefits — Xcel Energy maintains pension and postretirement benefit plans for eligible employees. Recognizing the cost of providing benefits and measuring the projected benefit obligation of these plans requires management to make various assumptions and estimates. Certain unrecognized actuarial gains and losses and unrecognized prior service costs or credits are deferred as regulatory assets and liabilities, rather than recorded as other comprehensive income, based on regulatory recovery mechanisms. See Note 11 for further information.
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| Environmental Costs | Environmental Costs — Environmental costs are recorded when it is probable Xcel Energy is liable for remediation costs and the amount can be reasonably estimated. Costs are deferred as a regulatory asset if it is probable the costs will be recovered from customers in future rates. Otherwise, the costs are expensed. For certain environmental costs related to facilities currently in use, such as for emission-control equipment, the cost is capitalized and depreciated over the life of the plant. Estimated remediation costs are regularly adjusted as estimates are revised and remediation is performed. If other participating potentially responsible parties exist and acknowledge their potential involvement with a site, costs are estimated and recorded only for Xcel Energy’s expected share of the cost. Future costs of restoring sites are treated as a capitalized cost of plant retirement. The depreciation expense levels recoverable in rates include a provision for removal expenses. Removal costs recovered in rates before the related costs are incurred are classified as a regulatory liability. See Note 12 for further information.
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| Revenue From Contracts With Customers | Revenue from Contracts with Customers — Performance obligations related to the sale of energy are satisfied as energy is delivered to customers. Xcel Energy recognizes revenue that corresponds to the price of the energy delivered to the customer. The measurement of energy sales to customers is generally based on the reading of their meters, which occurs systematically throughout the month. At the end of each month, amounts of energy delivered to customers since the date of the last meter reading are estimated, and the corresponding unbilled revenue is recognized. A separate financing component of collections from customers is not recognized as contract terms are short-term in nature. Revenues are net of any excise or sales taxes or fees. The utility subsidiaries recognize physical sales to customers (native load and wholesale) on a gross basis in electric revenues and cost of sales. Revenues and charges for short-term physical wholesale sales of excess energy transacted through RTOs are also recorded on a gross basis. Other revenues and charges settled/facilitated through an RTO are recorded on a net basis in cost of sales. See Note 6 for further information.
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| Cash and Cash Equivalents | Cash and Cash Equivalents — Xcel Energy considers investments in instruments with a remaining maturity of months or less at the time of purchase to be cash equivalents. | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Accounts Receivable and Allowance for Bad Debts | Accounts Receivable and Allowance for Bad Debts — Accounts receivable are stated at the actual billed amount net of an allowance for bad debts. Xcel Energy establishes an allowance for uncollectible receivables based on a policy that reflects its expected exposure to the credit risk of customers. As of Dec. 31, 2022 and 2021, the allowance for bad debts was $122 million and $106 million, respectively. | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Inventory | Inventory — Inventory is recorded at the lower of average cost or net realizable value and consisted of the following:
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| Fair Value Measurements | Fair Value Measurements — Xcel Energy presents cash equivalents, interest rate derivatives, commodity derivatives and nuclear decommissioning fund assets at estimated fair values in its consolidated financial statements. For interest rate derivatives, quoted prices based primarily on observable market interest rate curves are used to estimate fair value. For commodity derivatives, the most observable inputs available are generally used to determine the fair value of each contract. In the absence of a quoted price, quoted prices for similar contracts or internally prepared valuation models may be used to determine fair value. For the pension and postretirement plan assets and nuclear decommissioning fund, published trading data and pricing models, generally using the most observable inputs available, are utilized to determine fair value for each security. See Notes 10 and 11 for further information.
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| Derivative Instruments | Derivative Instruments — Xcel Energy uses derivative instruments in connection with its commodity trading activities, and to manage risk associated with changes in interest rates, and utility commodity prices, including forward contracts, futures, swaps and options. Any derivative instruments not qualifying for the normal purchases and normal sales exception are recorded on the consolidated balance sheets at fair value as derivative instruments. Classification of changes in fair value for those derivative instruments is dependent on the designation of a qualifying hedging relationship. Changes in fair value of derivative instruments not designated in a qualifying hedging relationship are reflected in current earnings or as a regulatory asset or liability. Classification as a regulatory asset or liability is based on commission approved regulatory recovery mechanisms. Gains or losses on commodity trading transactions are recorded as a component of electric operating revenues. Normal Purchases and Normal Sales — Xcel Energy enters into contracts for purchases and sales of commodities for use in its operations. At inception, contracts are evaluated to determine whether they contain a derivative, and if so, whether they may be exempted from derivative accounting if designated as normal purchases or normal sales. See Note 10 for further information.
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| Commodity Trading Operations | Commodity Trading Operations — All applicable gains and losses related to commodity trading activities are shown on a net basis in electric operating revenues in the consolidated statements of income. Commodity trading activities are not associated with energy produced from generation assets or energy and capacity purchased to serve native load. Commodity trading contracts are recorded at fair market value and commodity trading results include the impact of all margin-sharing mechanisms. See Note 10 for further information.
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| AFUDC | AFUDC — AFUDC represents the cost of capital used to finance utility construction activity and is computed by applying a composite financing rate to qualified CWIP. The amount of AFUDC capitalized as a utility construction cost is credited to other nonoperating income (for equity capital) and interest charges (for debt capital). AFUDC amounts capitalized are included in Xcel Energy’s rate base. | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Alternative Revenue Programs | Alternative Revenue — Certain rate rider mechanisms (including decoupling/sales true up and CIP/DSM programs) qualify as alternative revenue programs. These mechanisms arise from instances in which the regulator authorizes a future surcharge in response to past activities or completed events. When certain criteria are met, including expected collection within 24 months, revenue is recognized, which may include incentives and return on rate base items. Billing amounts are revised periodically for differences between total amount collected and revenue earned, which may increase or decrease the level of revenue collected from customers. Alternative revenues arising from these programs are presented on a gross basis and disclosed separately from revenue from contracts with customers. See Note 6 for further information. Conservation Programs — Costs incurred for DSM and CIP programs are deferred if it is probable future revenue will recover the incurred cost. Revenues recognized for incentive programs for the recovery of lost margins and/or conservation performance incentives are limited to amounts expected to be collected within 24 months from the year they are earned. Regulatory assets are recognized to reflect the amount of costs or earned incentives that have not yet been collected from customers.
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| Emission Allowances | Emissions Allowances — Emissions allowances are recorded at cost, including broker commission fees. The inventory accounting model is utilized for all emissions allowances and any sales of these allowances are included in electric revenues. | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Nuclear Refueling Outage Costs | Nuclear Refueling Outage Costs — Xcel Energy uses a deferral and amortization method for nuclear refueling costs. This method amortizes costs over the period between refueling outages consistent with rate recovery. | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Renewable Energy Credits | RECs — Cost of RECs that are utilized for compliance is recorded as electric fuel and purchased power expense. In certain jurisdictions, Xcel Energy reduces recoverable fuel and purchased power costs for the cost of RECs received. An inventory accounting model is used to account for RECs, however these assets are classified as regulatory assets if amounts are recoverable in future rates. Sales of RECs are recorded in electric revenues on a gross basis. The cost of these RECs and amounts credited to customers under margin-sharing mechanisms are recorded in electric fuel and purchased power expense. Cost of RECs that are utilized to support commodity trading activities are recorded in a similar manner as the associated commodities and are on a net basis in electric operating revenues in the consolidated statements of income.
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| Equity Method Investments | Equity Method Investments — The equity method of accounting is used for certain investments including WYCO and EIP funds, which requires Xcel Energy’s recognition of its share of these investees’ results, based on Xcel Energy’s proportional ownership interest. For investments in EIP funds, this includes Xcel Energy’s share of fund expenses and realized gains and losses, as well as unrealized gains and losses resulting from valuations of the funds’ investments in emerging energy technology companies. | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Summary of Significant Accounting Policies Inventory (Tables) |
12 Months Ended | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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Dec. 31, 2022 | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Balance Sheet Related Disclosure - Inventory [Abstract] | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Public Utilities, Inventory | Inventory — Inventory is recorded at the lower of average cost or net realizable value and consisted of the following:
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Property Plant and Equipment Property Plant and Equipment (Tables) |
12 Months Ended | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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Dec. 31, 2022 | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Property, Plant and Equipment [Line Items] | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Public Utility Property, Plant, and Equipment | Major classes of property, plant and equipment
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| NSP Minnesota | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Property, Plant and Equipment [Line Items] | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Schedule of Jointly Owned Utility Plants |
(a)Projects additionally include $4 million in CWIP.
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| NSP-Wisconsin | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Property, Plant and Equipment [Line Items] | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Schedule of Jointly Owned Utility Plants |
(a)Projects additionally include $1 million in CWIP.
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| PSCo | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Property, Plant and Equipment [Line Items] | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Schedule of Jointly Owned Utility Plants |
(a)Projects additionally include $10 million in CWIP.
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Regulatory Assets and Liabilities (Tables) |
12 Months Ended | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Regulatory Assets and Liabilities Disclosure [Abstract] | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Regulatory Assets | Components of regulatory assets:
(a)Prior period amounts have been restated to conform with current year presentation. (b)Includes amounts recorded for future recovery of AROs, less amounts recovered through nuclear decommissioning accruals and gains from decommissioning investments. (c)Includes costs for conservation programs, as well as incentives allowed in certain jurisdictions. (d)Includes the fair value of certain long-term PPAs used to meet energy capacity requirements and valuation adjustments on natural gas commodity purchases.
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| Regulatory Liabilities | Components of regulatory liabilities:
(a)Prior period amounts have been restated to conform with current year presentation. (b)Includes the revaluation of recoverable/regulated plant accumulated deferred income taxes and revaluation impact of non-plant accumulated deferred income taxes due to the TCJA. (c)Includes regulatory amortization and certain 2018 TCJA benefits approved by the CPUC to offset the PSCo prepaid pension asset. (d)Includes the fair value of FTR instruments utilized/intended to offset the impacts of transmission system congestion. (e)Includes costs for conservation programs, as well as incentives allowed in certain jurisdictions. (f)Revenue subject to refund of $67 million and $17 million for 2022 and 2021, respectively, is included in other current liabilities.
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Borrowings and Other Financing Instruments Borrowings and Other Financing Instruments (Tables) |
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| Debt Disclosure [Abstract] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Commercial Paper | Commercial paper and other borrowings outstanding:
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| Schedule of Debt To Total Capitalization Ratio | Features of the credit facilities:
(a) Each credit facility has a financial covenant requiring that the debt-to-total capitalization ratio be less than or equal to 65%. (b) All extension requests are subject to majority bank group approval. (c) The Xcel Energy Inc. credit facility has a cross-default provision that Xcel Energy Inc. would be in default on its borrowings under the facility if it or any of its subsidiaries (except NSP-Wisconsin as long as its total assets do not comprise more than 15% of Xcel Energy’s consolidated total assets) default on indebtedness in an aggregate principal amount exceeding $75 million.
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| Credit Facilities | As of Dec. 31, 2022, NSP-Minnesota had $54 million outstanding letters of credit under the $75 million Bilateral Credit Agreement. Xcel Energy Inc. and its utility subsidiaries had the following committed credit facilities available as of Dec. 31, 2022:
(a)These credit facilities mature in September 2027. (b)Includes outstanding commercial paper and letters of credit.
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| Schedule of Long Term Debt Instruments | Long-term debt obligations for Xcel Energy Inc. and its utility subsidiaries as of Dec. 31 (in millions of dollars):
(a)2021 financing. (b)2022 financing.
(a)2021 financing. (b)2022 financing.
(a)2021 financing. (b)2022 financing.
(a)2021 financing. (b)2022 financing.
(a)2020 financing re-opened in 2021. (b)2022 financing.
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| Schedule of Maturities of Long-term Debt |
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| Schedule of Stock by Class [Table Text Block] | Capital Stock — Preferred stock authorized/outstanding:
Xcel Energy Inc. had the following common stock authorized/outstanding:
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| Share-based Payment Arrangement, Restricted Stock and Restricted Stock Unit, Activity [Table Text Block] | Requirements and actuals as of Dec. 31, 2022:
(a) Excludes short-term debt.
(a) Cannot pay annual dividends in excess of forecasted levels if its average equity-to-total capitalization ratio falls below the commission authorized level. (b) May not pay a dividend that would cause a loss of its investment grade bond rating.
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| Other Capital Restrictions | Amounts authorized to issue as of Dec. 31, 2022:
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Revenues (Tables) |
12 Months Ended | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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Dec. 31, 2022 | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Revenue from Contract with Customer [Abstract] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Disaggregation of Revenue | Xcel Energy’s operating revenues consisted of the following:
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Income Taxes (Tables) |
12 Months Ended | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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Dec. 31, 2022 | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Income Tax Disclosure [Abstract] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Summary of Statute of Limitations Applicable to Open Tax Years [Table Text Block] | Statute of limitations applicable to Xcel Energy’s consolidated federal income tax returns expire as follows:
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| State Statute of Limitations Applicable to Open Tax Years |
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| Reconciliation of Unrecognized Tax Benefits | Unrecognized tax benefits - permanent vs. temporary:
Changes in unrecognized tax benefits:
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| Tax Benefits Associated with NOL and Tax Credit Carryforwards | Unrecognized tax benefits were reduced by tax benefits associated with NOL and tax credit carryforwards:
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| Interest Payable related to Unrecognized Tax Benefits [Table Text Block] | Interest payable related to unrecognized tax benefits:
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| NOL and Tax Credit Carryforwards | NOL amounts represent the tax loss that is carried forward and tax credits represent the deferred tax asset. NOL and tax credit carryforwards as of Dec. 31:
(a)State tax credit carryforwards are net of federal detriment of $23 million and $24 million as of Dec. 31, 2022 and 2021. (b)Valuation allowances for state tax credit carryforwards were net of federal benefit of $16 million and $17 million as of Dec. 31, 2022 and 2021.
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| Schedule of Effective Income Tax Rate Reconciliation | Effective income tax rate for years ended Dec. 31:
(a)Prior period amounts have been restated to conform with current year presentation. (b)Wind PTCs are credited to customers (reduction to revenue) and do not materially impact net income. (c)Regulatory differences for income tax primarily relate to the credit of excess deferred taxes to customers through the average rate assumption method. Income tax benefits associated with the credit of excess deferred taxes are offset by corresponding revenue reductions and additional prepaid pension asset amortization.
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| Schedule of Components of Income Tax Expense (Benefit) | Components of income tax expense for years ended Dec. 31:
Components of deferred income tax expense as of Dec. 31:
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| Schedule of Deferred Tax Assets and Liabilities | Components of net deferred tax liability as of Dec. 31:
(a)Prior periods have been reclassified to conform to current year presentation.
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Share-Based Compensation (Tables) |
12 Months Ended | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Share-Based Payment Arrangement [Abstract] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Equity Awards | Equity award units granted to employees:
Equity awards vested:
Changes in the nonvested portion of equity award units:
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| Stock Equivalent Unit Plan | Stock equivalent units granted:
Changes in stock equivalent units:
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| TSR Liability Awards | Liability awards granted:
Liability awards settled:
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| Compensation costs related to share-based awards | Compensation costs related to share-based awards:
(a)Compensation costs for share-based payments are included in O&M expense. Amount for equity awards (non-cash) amounted to $20 million in 2022.
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Earnings Per Share (Tables) |
12 Months Ended | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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Dec. 31, 2022 | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Earnings Per Share [Abstract] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Schedule of Weighted Average Number of Shares | Common shares outstanding used in the basic and diluted EPS computation:
(a)Diluted common shares outstanding included common stock equivalents of 0.3 million, 0.3 million and 1.1 million shares for 2022, 2021 and 2020, respectively.
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Fair Value of Financial Assets and Liabilities (Tables) |
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| Fair Value Disclosures [Abstract] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Cost and Fair Value of Nuclear Decommissioning Fund Investments | Non-derivative instruments with recurring fair value measurements in the nuclear decommissioning fund:
(a)Reported in nuclear decommissioning fund and other investments on the consolidated balance sheets, which also includes $219 million of equity method investments and $133 million of rabbi trust assets and other miscellaneous investments.
(a)Reported in nuclear decommissioning fund and other investments on the consolidated balance sheets, which also includes $208 million of equity investments in unconsolidated subsidiaries and $164 million of rabbi trust assets and other miscellaneous investments.
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| Final Contractual Maturity Dates of Debt Securities in the Nuclear Decommissioning Fund by Asset Class | Contractual maturity dates of debt securities in the nuclear decommissioning fund as of Dec. 31, 2022:
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| Schedule of Notional Amounts of Outstanding Derivative Positions [Table Text Block] | Gross notional amounts of commodity forwards, options and FTRs:
(a)Not reflective of net positions in the underlying commodities. (b)Notional amounts for options included on a gross basis but weighted for the probability of exercise.
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| Derivative Instruments, Gain (Loss) [Table Text Block] | Impact of derivative activity:
(a)Recorded to interest charges. (b)Recorded to electric revenues. Presented amounts do not reflect non-derivative transactions or margin sharing with customers. (c)Recorded to electric fuel and purchased power. These derivative settlement gains and losses are shared with electric customers through fuel and purchased energy cost-recovery mechanisms and reclassified out of income as regulatory assets or liabilities, as appropriate. FTR settlements are shared with customers and do not have a material impact on net income. Presented amounts reflect changes in fair value between auction and settlement dates, but exclude the original auction fair value. (d)Recorded to cost of natural gas sold and transported. These losses are subject to cost-recovery mechanisms and reclassified out of income to a regulatory asset, as appropriate. (e)Relates primarily to option premium amortization.
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| Fair Value Assets And Liabilities Measured On Recurring Basis Unobservable Input Reconciliation [Table Text Block] | Changes in Level 3 commodity derivatives:
(a)Relates primarily to NSP-Minnesota and SPS FTR instruments administered by MISO and SPP. (b)Relates to commodity trading and is subject to substantial offsetting losses and gains on derivative instruments categorized as levels 1 and 2 in the income statement. See above tables for the income statement impact of derivative activity, including commodity trading gains and losses.
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| Fair Value, by Balance Sheet Grouping [Table Text Block] | As of Dec. 31, other financial instruments for which the carrying amount did not equal fair value:
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Benefit Plans and Other Postretirement Benefits (Tables) |
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| Benefit Plans and Other Postretirement Benefits [Abstract] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Target Asset Allocations and Plan Assets Measured at Fair Value | For each of the fair value hierarchy levels, Xcel Energy’s pension plan assets measured at fair value:
(a)See Note 10 for further information regarding fair value measurement inputs and methods. For each of the fair value hierarchy levels, Xcel Energy’s postretirement benefit plan assets that were measured at fair value:
(a)See Note 10 for further information on fair value measurement inputs and methods. .Targeted asset allocations:
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| Changes in Projected Benefit Obligations, Fair Value of Plan Assets, and Funded Status of Plan [Table Text Block] |
(a)Includes approximately $195 million in 2022 and $197 million in 2021 of lump-sum benefit payments used in the determination of a settlement charge.
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| Projected Benefit Payments for the Pension and Postretirement Benefit Plans |
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| Amounts Not Yet Recognized as Components of Net Periodic Benefit Cost |
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| Components of Net Periodic Benefit Costs | Components of net periodic benefit cost (credit) and amounts recognized in other comprehensive income and regulatory assets and liabilities:
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Commitments and Contingencies (Tables) |
12 Months Ended | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Commitments and Contingencies Disclosure [Abstract] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Asset Retirement Obligations | Xcel Energy’s AROs were as follows:
(a)Amounts incurred related to the wind farms placed in service in 2022 for NSP-Minnesota (Dakota Range and Rock Aetna) and steam production pond remediation costs for PSCo. (b)In 2022, AROs were revised for changes in timing and estimates of cash flows. Revisions in steam, hydro and other production AROs were primarily related to changes in cost estimates for remediation of ash containment facilities. Changes in gas transmission and distribution AROs were primarily related to changes in labor rates coupled with increased gas line mileage and number of services.
(a)Amounts incurred related to the wind farms placed in service in 2021 for NSP-Minnesota (Blazing Star 2, Mower and Freeborn) and removal of a utility scale battery asset in NSP-Minnesota. (b)In 2021, AROs were revised for changes in timing and estimates of cash flows. Revisions in steam, hydro and other production AROs were primarily related to changes in cost estimates for remediation of ash containment facilities. Changes in gas transmission and distribution AROs were primarily related to changes in labor rates coupled with increased gas line mileage and number of services.
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| Assets and Liabilities, Lessee [Table Text Block] | Operating lease ROU assets:
Finance lease ROU assets:
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| Lease, Cost [Table Text Block] | Components of lease expense:
(a)Includes short-term lease expense of $6 million for 2022 and $5 million for 2021 and 2020. (b)PPA capacity payments are included in electric fuel and purchased power on the consolidated statements of income. Expense for other operating leases is included in O&M expense and electric fuel and purchased power.
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| Finance Lease, Liability, Maturity [Table Text Block] | Commitments under operating and finance leases as of Dec. 31, 2022:
(a)Amounts do not include PPAs accounted for as executory contracts and/or contingent payments, such as energy payments on renewable PPAs. (b)PPA operating leases contractually expire at various dates through 2033. (c)Excludes certain amounts related to Xcel Energy’s 50% ownership interest in WYCO.
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| Estimated Future Payments for Capacity and Energy Pursuant to Purchased Power Agreements | At Dec. 31, 2022, the estimated future payments for capacity and energy that the utility subsidiaries of Xcel Energy are obligated to purchase pursuant to these executory contracts, subject to availability, were as follows:
(a)Excludes contingent energy payments for renewable energy PPAs.
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| Estimated Minimum Purchases Under Fuel Contracts | Estimated minimum purchases under these contracts as of Dec. 31, 2022:
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Other Comprehensive Income (Tables) |
12 Months Ended | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Stockholders' Equity Note [Abstract] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Changes in Accumulated Other Comprehensive Income (Loss), Net of Tax | Changes in accumulated other comprehensive loss, net of tax, for the years ended Dec. 31:
(a)Included in interest charges. (b)Included in the computation of net periodic pension and postretirement benefit costs. See Note 11 for further information.
(a)Included in interest charges. (b)Included in the computation of net periodic pension and postretirement benefit costs. See Note 11 for further information.
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Segments and Related Information (Tables) |
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| Segment Reporting [Abstract] | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Results from Operations by Reportable Segment | Xcel Energy’s segment information:
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Schedule II, Valuation and Qualifying Accounts SEC Schedule, 12-09, Schedule of Valuation and Qualifying Accounts (Tables) |
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| SEC Schedule, 12-09, Valuation and Qualifying Accounts Disclosure [Line Items] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| SEC Schedule, 12-09, Schedule of Valuation and Qualifying Accounts Disclosure [Text Block] | Xcel Energy Inc. and Subsidiaries Valuation and Qualifying Accounts Years Ended Dec. 31
(a)Recovery of amounts previously written-off. (b)Deductions related primarily to bad debt write-offs. (c)Primarily reductions to valuation allowances due to additional NOLs and tax credits forecasted to be used prior to expiration. (d)Primarily the reduction of valuation allowances for North Dakota ITC, net of federal income tax benefit, that is offset to a regulatory liability forecasted to be used prior to expiration along with valuation allowances that expired.
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Summary of Significant Accounting Policies Summary of Significant Accounting Policies (Details) - USD ($) $ in Millions |
12 Months Ended | ||
|---|---|---|---|
Dec. 31, 2022 |
Dec. 31, 2021 |
Dec. 31, 2020 |
|
| Property, Plant and Equipment [Abstract] | |||
| Depreciation expense expressed as a percentage of average depreciable property | 3.70% | 3.50% | 3.40% |
| Nuclear Decommissioning [Abstract] | |||
| Studies time periods | 3 years | ||
| Cash and Cash Equivalents [Abstract] | |||
| maturity period | 3 months | ||
| Accounts, Notes, Loans and Financing Receivable | |||
| Allowance for bad debts | $ 122 | $ 106 | |
| Alternative Revenue Programs [Abstract] | |||
| maximum number of months following end of annual period in which revenues are earned to be included in | 24 months | ||
| Inventories | $ 803 | 631 | |
| Studies time periods | 3 years | ||
| maximum number of months following end of annual period in which revenues are earned to be included in | 24 months | ||
| maturity period | 3 months | ||
| Supplies [Member] | |||
| Inventories | $ 330 | 289 | |
| Public Utilities, Inventory, Fuel [Member] | |||
| Inventories | 201 | 182 | |
| Public Utilities, Inventory, Natural Gas [Member] | |||
| Inventories | $ 272 | $ 160 | |
Accounting Pronouncements - Recently Adopted (Details) $ in Millions |
12 Months Ended |
|---|---|
|
Dec. 31, 2020
USD ($)
| |
| New Accounting Pronouncements or Change in Accounting Principle [Line Items] | |
| Credit Losses, Topic 326 (ASC Topic 326) | $ (2) |
| Retained Earnings | |
| New Accounting Pronouncements or Change in Accounting Principle [Line Items] | |
| Credit Losses, Topic 326 (ASC Topic 326) | $ (2) |
Property Plant and Equipment Major classes of property, plant and equipment (Details) - USD ($) $ in Millions |
Dec. 31, 2022 |
Dec. 31, 2021 |
||
|---|---|---|---|---|
| Property, Plant and Equipment [Line Items] | ||||
| Property, plant and equipment | $ 65,464 | $ 62,209 | ||
| Accumulated depreciation and amortization | (17,502) | (17,060) | ||
| Property, plant and equipment, net | 48,253 | 45,457 | ||
| Electric plant | ||||
| Property, Plant and Equipment [Line Items] | ||||
| Property, plant and equipment | 49,639 | 48,680 | ||
| Natural gas plant | ||||
| Property, Plant and Equipment [Line Items] | ||||
| Property, plant and equipment | 8,514 | 7,758 | ||
| Common and other property | ||||
| Property, Plant and Equipment [Line Items] | ||||
| Property, plant and equipment | 2,970 | 2,602 | ||
| Plant to be retired | ||||
| Property, Plant and Equipment [Line Items] | ||||
| Property, plant and equipment | [1] | 2,217 | 1,200 | |
| CWIP | ||||
| Property, Plant and Equipment [Line Items] | ||||
| Property, plant and equipment | 2,124 | 1,969 | ||
| Nuclear fuel | ||||
| Property, Plant and Equipment [Line Items] | ||||
| Property, plant and equipment | 3,183 | 3,081 | ||
| Accumulated depreciation and amortization | $ (2,892) | $ (2,773) | ||
| ||||
Property Plant and Equipment Joint Ownership of Generation, Transmission and Gas Facilities (Details) $ in Millions |
Dec. 31, 2022
USD ($)
|
|||||||
|---|---|---|---|---|---|---|---|---|
| NSP Minnesota | ||||||||
| Jointly Owned Utility Plant Interests [Line Items] | ||||||||
| Plant in Service | $ 1,686 | [1] | ||||||
| Accumulated Depreciation | 715 | [1] | ||||||
| CWIP | 4 | |||||||
| NSP Minnesota | Electric Generation | Sherco Unit 3 | ||||||||
| Jointly Owned Utility Plant Interests [Line Items] | ||||||||
| Plant in Service | 623 | |||||||
| Accumulated Depreciation | $ 468 | |||||||
| Percent Owned | 59.00% | |||||||
| NSP Minnesota | Electric Generation | Sherco Common Facilities | ||||||||
| Jointly Owned Utility Plant Interests [Line Items] | ||||||||
| Plant in Service | $ 180 | |||||||
| Accumulated Depreciation | $ 115 | |||||||
| Percent Owned | 80.00% | |||||||
| NSP Minnesota | Electric Generation | Sherco substation | ||||||||
| Jointly Owned Utility Plant Interests [Line Items] | ||||||||
| Plant in Service | $ 5 | |||||||
| Accumulated Depreciation | $ 4 | |||||||
| Percent Owned | 59.00% | |||||||
| NSP Minnesota | Electric Transmission | Grand Meadow | ||||||||
| Jointly Owned Utility Plant Interests [Line Items] | ||||||||
| Plant in Service | $ 11 | |||||||
| Accumulated Depreciation | $ 3 | |||||||
| Percent Owned | 50.00% | |||||||
| NSP Minnesota | Electric Transmission | Huntley Wilmarth | ||||||||
| Jointly Owned Utility Plant Interests [Line Items] | ||||||||
| Plant in Service | $ 49 | |||||||
| Accumulated Depreciation | $ 1 | |||||||
| Percent Owned | 50.00% | |||||||
| NSP Minnesota | Electric Transmission | CapX2020 | ||||||||
| Jointly Owned Utility Plant Interests [Line Items] | ||||||||
| Plant in Service | $ 818 | |||||||
| Accumulated Depreciation | $ 124 | |||||||
| Percent Owned | 51.00% | |||||||
| NSP-Wisconsin | ||||||||
| Jointly Owned Utility Plant Interests [Line Items] | ||||||||
| Plant in Service | $ 343 | [2] | ||||||
| Accumulated Depreciation | 54 | [2] | ||||||
| CWIP | 1 | |||||||
| NSP-Wisconsin | Electric Transmission | La Crosse, WI to Madison, WI | ||||||||
| Jointly Owned Utility Plant Interests [Line Items] | ||||||||
| Plant in Service | 177 | |||||||
| Accumulated Depreciation | $ 20 | |||||||
| Percent Owned | 37.00% | |||||||
| NSP-Wisconsin | Electric Transmission | CapX2020 | ||||||||
| Jointly Owned Utility Plant Interests [Line Items] | ||||||||
| Plant in Service | $ 166 | |||||||
| Accumulated Depreciation | $ 34 | |||||||
| Percent Owned | 80.00% | |||||||
| PSCo | ||||||||
| Jointly Owned Utility Plant Interests [Line Items] | ||||||||
| Plant in Service | $ 1,636 | [3] | ||||||
| Accumulated Depreciation | 544 | [3] | ||||||
| CWIP | 10 | |||||||
| PSCo | Electric Generation | Hayden Unit 1 | ||||||||
| Jointly Owned Utility Plant Interests [Line Items] | ||||||||
| Plant in Service | 157 | |||||||
| Accumulated Depreciation | $ 99 | |||||||
| Percent Owned | 76.00% | |||||||
| PSCo | Electric Generation | Hayden Unit 2 | ||||||||
| Jointly Owned Utility Plant Interests [Line Items] | ||||||||
| Plant in Service | $ 151 | |||||||
| Accumulated Depreciation | $ 81 | |||||||
| Percent Owned | 37.00% | |||||||
| PSCo | Electric Generation | Hayden Common Facilities | ||||||||
| Jointly Owned Utility Plant Interests [Line Items] | ||||||||
| Plant in Service | $ 42 | |||||||
| Accumulated Depreciation | $ 29 | |||||||
| Percent Owned | 53.00% | |||||||
| PSCo | Electric Generation | Craig Units 1 and 2 | ||||||||
| Jointly Owned Utility Plant Interests [Line Items] | ||||||||
| Plant in Service | $ 82 | |||||||
| Accumulated Depreciation | $ 51 | |||||||
| Percent Owned | 10.00% | |||||||
| PSCo | Electric Generation | Craig Common Facilities | ||||||||
| Jointly Owned Utility Plant Interests [Line Items] | ||||||||
| Plant in Service | $ 39 | |||||||
| Accumulated Depreciation | $ 24 | |||||||
| Percent Owned | 7.00% | |||||||
| PSCo | Electric Generation | Comanche Unit 3 | ||||||||
| Jointly Owned Utility Plant Interests [Line Items] | ||||||||
| Plant in Service | $ 918 | |||||||
| Accumulated Depreciation | $ 174 | |||||||
| Percent Owned | 67.00% | |||||||
| PSCo | Electric Generation | Comanche Common Facilities | ||||||||
| Jointly Owned Utility Plant Interests [Line Items] | ||||||||
| Plant in Service | $ 28 | |||||||
| Accumulated Depreciation | $ 3 | |||||||
| Percent Owned | 82.00% | |||||||
| PSCo | Electric Transmission | Transmission and other facilities | ||||||||
| Jointly Owned Utility Plant Interests [Line Items] | ||||||||
| Plant in Service | $ 186 | |||||||
| Accumulated Depreciation | 72 | |||||||
| PSCo | Gas Transportation | Rifle, CO to Avon, CO | ||||||||
| Jointly Owned Utility Plant Interests [Line Items] | ||||||||
| Plant in Service | 25 | |||||||
| Accumulated Depreciation | $ 9 | |||||||
| Percent Owned | 60.00% | |||||||
| PSCo | Gas Transportation | Gas Transportation Compressor | ||||||||
| Jointly Owned Utility Plant Interests [Line Items] | ||||||||
| Plant in Service | $ 8 | |||||||
| Accumulated Depreciation | $ 2 | |||||||
| Percent Owned | 50.00% | |||||||
| ||||||||
Regulatory Assets and Liabilities, Regulatory Assets (Details) - USD ($) $ in Millions |
12 Months Ended | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
Dec. 31, 2022 |
Dec. 31, 2021 |
||||||||||
| Regulatory Assets [Line Items] | |||||||||||
| Regulatory Asset, Current | $ 1,059 | $ 1,106 | |||||||||
| Regulatory Asset, Noncurrent | (2,871) | (2,738) | |||||||||
| Regulatory assets not currently earning a return | 1,020 | 1,718 | |||||||||
| Pension and retiree medical obligations | |||||||||||
| Regulatory Assets [Line Items] | |||||||||||
| Regulatory Asset, Current | 22 | 77 | [1] | ||||||||
| Regulatory Asset, Noncurrent | (1,069) | (944) | [1] | ||||||||
| Net AROs | |||||||||||
| Regulatory Assets [Line Items] | |||||||||||
| Regulatory Asset, Current | [2] | 0 | 0 | [1] | |||||||
| Regulatory Asset, Noncurrent | [2] | (339) | (112) | [1] | |||||||
| Deferred purchased natural gas and electric energy costs | |||||||||||
| Regulatory Assets [Line Items] | |||||||||||
| Regulatory Asset, Current | 581 | 504 | [1] | ||||||||
| Regulatory Asset, Noncurrent | $ (299) | (543) | [1] | ||||||||
| Deferred purchased natural gas and electric energy costs | Minimum | |||||||||||
| Regulatory Assets [Line Items] | |||||||||||
| Regulatory Asset, Remaining Amortization Period | 1 year | ||||||||||
| Deferred purchased natural gas and electric energy costs | Maximum | |||||||||||
| Regulatory Assets [Line Items] | |||||||||||
| Regulatory Asset, Remaining Amortization Period | 5 years | ||||||||||
| Recoverable deferred taxes on AFUDC recorded in plant | |||||||||||
| Regulatory Assets [Line Items] | |||||||||||
| Regulatory Asset, Current | $ 0 | 0 | [1] | ||||||||
| Regulatory Asset, Noncurrent | (292) | (289) | [1] | ||||||||
| Excess deferred taxes - TCJA | |||||||||||
| Regulatory Assets [Line Items] | |||||||||||
| Regulatory Asset, Current | 13 | 14 | [1] | ||||||||
| Regulatory Asset, Noncurrent | (205) | (219) | [1] | ||||||||
| Depreciation differences | |||||||||||
| Regulatory Assets [Line Items] | |||||||||||
| Regulatory Asset, Current | 17 | 16 | [1] | ||||||||
| Regulatory Asset, Noncurrent | $ (193) | (173) | [1] | ||||||||
| Depreciation differences | Minimum | |||||||||||
| Regulatory Assets [Line Items] | |||||||||||
| Regulatory Asset, Remaining Amortization Period | 1 year | ||||||||||
| Depreciation differences | Maximum | |||||||||||
| Regulatory Assets [Line Items] | |||||||||||
| Regulatory Asset, Remaining Amortization Period | 12 years | ||||||||||
| Environmental remediation costs | |||||||||||
| Regulatory Assets [Line Items] | |||||||||||
| Regulatory Asset, Current | $ 20 | 14 | [1] | ||||||||
| Regulatory Asset, Noncurrent | (92) | (92) | [1] | ||||||||
| Benson Biomass PPA termination and asset purchase | |||||||||||
| Regulatory Assets [Line Items] | |||||||||||
| Regulatory Asset, Current | 10 | 10 | [1] | ||||||||
| Regulatory Asset, Noncurrent | $ (45) | (55) | [1] | ||||||||
| Regulatory Asset, Remaining Amortization Period | 6 years | ||||||||||
| PI extended power update | |||||||||||
| Regulatory Assets [Line Items] | |||||||||||
| Regulatory Asset, Current | $ 4 | 4 | [1] | ||||||||
| Regulatory Asset, Noncurrent | $ (42) | (46) | [1] | ||||||||
| Regulatory Asset, Remaining Amortization Period | 12 years | ||||||||||
| Conservation programs | |||||||||||
| Regulatory Assets [Line Items] | |||||||||||
| Regulatory Asset, Current | [3] | $ 16 | 21 | [1] | |||||||
| Regulatory Asset, Noncurrent | [3] | $ (36) | (35) | [1] | |||||||
| Conservation programs | Minimum | |||||||||||
| Regulatory Assets [Line Items] | |||||||||||
| Regulatory Asset, Remaining Amortization Period | 1 year | ||||||||||
| Conservation programs | Maximum | |||||||||||
| Regulatory Assets [Line Items] | |||||||||||
| Regulatory Asset, Remaining Amortization Period | 2 years | ||||||||||
| Purchased power contract costs | |||||||||||
| Regulatory Assets [Line Items] | |||||||||||
| Regulatory Asset, Current | $ 10 | 9 | [1] | ||||||||
| Regulatory Asset, Noncurrent | (36) | (45) | [1] | ||||||||
| State commission adjustments | |||||||||||
| Regulatory Assets [Line Items] | |||||||||||
| Regulatory Asset, Current | 1 | 1 | [1] | ||||||||
| Regulatory Asset, Noncurrent | (33) | (32) | [1] | ||||||||
| Losses on reacquired debt | |||||||||||
| Regulatory Assets [Line Items] | |||||||||||
| Regulatory Asset, Current | 3 | 3 | [1] | ||||||||
| Regulatory Asset, Noncurrent | (32) | (35) | [1] | ||||||||
| Contract valuation adjustments | |||||||||||
| Regulatory Assets [Line Items] | |||||||||||
| Regulatory Asset, Current | [4] | 28 | 22 | [1] | |||||||
| Regulatory Asset, Noncurrent | [4] | (28) | (34) | [1] | |||||||
| Grid modernization costs | |||||||||||
| Regulatory Assets [Line Items] | |||||||||||
| Regulatory Asset, Current | 14 | 0 | [1] | ||||||||
| Regulatory Asset, Noncurrent | (24) | (36) | [1] | ||||||||
| Gas pipeline inspection and remediation costs | |||||||||||
| Regulatory Assets [Line Items] | |||||||||||
| Regulatory Asset, Current | 42 | 33 | [1] | ||||||||
| Regulatory Asset, Noncurrent | $ (13) | (12) | [1] | ||||||||
| Gas pipeline inspection and remediation costs | Minimum | |||||||||||
| Regulatory Assets [Line Items] | |||||||||||
| Regulatory Asset, Remaining Amortization Period | 1 year | ||||||||||
| Gas pipeline inspection and remediation costs | Maximum | |||||||||||
| Regulatory Assets [Line Items] | |||||||||||
| Regulatory Asset, Remaining Amortization Period | 2 years | ||||||||||
| Nuclear refueling outage costs | |||||||||||
| Regulatory Assets [Line Items] | |||||||||||
| Regulatory Asset, Current | $ 30 | 37 | [1] | ||||||||
| Regulatory Asset, Noncurrent | $ (12) | (16) | [1] | ||||||||
| Nuclear refueling outage costs | Minimum | |||||||||||
| Regulatory Assets [Line Items] | |||||||||||
| Regulatory Asset, Remaining Amortization Period | 1 year | ||||||||||
| Nuclear refueling outage costs | Maximum | |||||||||||
| Regulatory Assets [Line Items] | |||||||||||
| Regulatory Asset, Remaining Amortization Period | 2 years | ||||||||||
| Renewable resources and environmental initiatives | |||||||||||
| Regulatory Assets [Line Items] | |||||||||||
| Regulatory Asset, Current | $ 50 | 170 | [1] | ||||||||
| Regulatory Asset, Noncurrent | $ (6) | (48) | [1] | ||||||||
| Renewable resources and environmental initiatives | Minimum | |||||||||||
| Regulatory Assets [Line Items] | |||||||||||
| Regulatory Asset, Remaining Amortization Period | 1 year | ||||||||||
| Renewable resources and environmental initiatives | Maximum | |||||||||||
| Regulatory Assets [Line Items] | |||||||||||
| Regulatory Asset, Remaining Amortization Period | 2 years | ||||||||||
| Texas revenue surcharges | |||||||||||
| Regulatory Assets [Line Items] | |||||||||||
| Regulatory Asset, Current | $ 69 | 20 | [1] | ||||||||
| Regulatory Asset, Noncurrent | $ 0 | (64) | [1] | ||||||||
| Texas revenue surcharges | Minimum | |||||||||||
| Regulatory Assets [Line Items] | |||||||||||
| Regulatory Asset, Remaining Amortization Period | 1 year | ||||||||||
| Sales true-up and revenue decoupling | |||||||||||
| Regulatory Assets [Line Items] | |||||||||||
| Regulatory Asset, Current | $ 54 | 33 | [1] | ||||||||
| Regulatory Asset, Noncurrent | $ 0 | (56) | [1] | ||||||||
| Sales true-up and revenue decoupling | Minimum | |||||||||||
| Regulatory Assets [Line Items] | |||||||||||
| Regulatory Asset, Remaining Amortization Period | 1 year | ||||||||||
| Sales true-up and revenue decoupling | Maximum | |||||||||||
| Regulatory Assets [Line Items] | |||||||||||
| Regulatory Asset, Remaining Amortization Period | 2 years | ||||||||||
| Other | |||||||||||
| Regulatory Assets [Line Items] | |||||||||||
| Regulatory Asset, Current | $ 75 | 118 | [1] | ||||||||
| Regulatory Asset, Noncurrent | $ (75) | $ (76) | [1] | ||||||||
| |||||||||||
Regulatory Assets and Liabilities, Regulatory Liabilities (Details) - USD ($) $ in Millions |
12 Months Ended | ||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Dec. 31, 2022 |
Dec. 31, 2021 |
||||||||||||||
| Regulatory Liabilities [Line Items] | |||||||||||||||
| Regulatory Liability, Current | [1] | $ 418 | $ 271 | ||||||||||||
| Regulatory Liability, Noncurrent | [1] | 5,569 | 5,405 | ||||||||||||
| Regulatory assets not currently earning a return | 1,020 | 1,718 | |||||||||||||
| Other Current Liabilities | |||||||||||||||
| Regulatory Liabilities [Line Items] | |||||||||||||||
| Entity's Recorded Provision for Revenue Subject To Refund | 67 | 17 | |||||||||||||
| Deferred income tax adjustment and TCJA refunds | |||||||||||||||
| Regulatory Liabilities [Line Items] | |||||||||||||||
| Regulatory Liability, Current | [2] | 9 | 26 | [3] | |||||||||||
| Regulatory Liability, Noncurrent | [2] | 3,110 | 3,230 | [3] | |||||||||||
| Plant removal costs | |||||||||||||||
| Regulatory Liabilities [Line Items] | |||||||||||||||
| Regulatory Liability, Current | 0 | 0 | [3] | ||||||||||||
| Regulatory Liability, Noncurrent | 1,819 | 1,655 | [3] | ||||||||||||
| Effects of regulation on employee benefit costs | |||||||||||||||
| Regulatory Liabilities [Line Items] | |||||||||||||||
| Regulatory Liability, Current | [4] | 0 | 0 | [3] | |||||||||||
| Regulatory Liability, Noncurrent | [4] | 247 | 235 | [3] | |||||||||||
| Renewable resources and environmental initiatives | |||||||||||||||
| Regulatory Liabilities [Line Items] | |||||||||||||||
| Regulatory Liability, Current | 6 | 1 | [3] | ||||||||||||
| Regulatory Liability, Noncurrent | 173 | 101 | [3] | ||||||||||||
| Sales true-up and revenue decoupling | |||||||||||||||
| Regulatory Liabilities [Line Items] | |||||||||||||||
| Regulatory Liability, Current | 0 | 9 | [3] | ||||||||||||
| Regulatory Liability, Noncurrent | $ 77 | 41 | [3] | ||||||||||||
| Sales true-up and revenue decoupling | Minimum | |||||||||||||||
| Regulatory Liabilities [Line Items] | |||||||||||||||
| Regulatory Liability, Amortization Period | 1 year | ||||||||||||||
| Sales true-up and revenue decoupling | Maximum | |||||||||||||||
| Regulatory Liabilities [Line Items] | |||||||||||||||
| Regulatory Liability, Amortization Period | 2 years | ||||||||||||||
| ITC deferrals | |||||||||||||||
| Regulatory Liabilities [Line Items] | |||||||||||||||
| Regulatory Liability, Current | $ 1 | 0 | [3] | ||||||||||||
| Regulatory Liability, Noncurrent | 61 | 53 | [3] | ||||||||||||
| Formula rates | |||||||||||||||
| Regulatory Liabilities [Line Items] | |||||||||||||||
| Regulatory Liability, Current | 32 | 19 | |||||||||||||
| Regulatory Liability, Noncurrent | $ 17 | 11 | |||||||||||||
| Formula rates | Minimum | |||||||||||||||
| Regulatory Liabilities [Line Items] | |||||||||||||||
| Regulatory Liability, Amortization Period | 1 year | ||||||||||||||
| Formula rates | Maximum | |||||||||||||||
| Regulatory Liabilities [Line Items] | |||||||||||||||
| Regulatory Liability, Amortization Period | 2 years | ||||||||||||||
| Contract valuation adjustments | |||||||||||||||
| Regulatory Liabilities [Line Items] | |||||||||||||||
| Regulatory Liability, Current | [5] | $ 175 | 56 | [3] | |||||||||||
| Regulatory Liability, Noncurrent | [5] | $ 1 | 1 | [3] | |||||||||||
| Contract valuation adjustments | Minimum | |||||||||||||||
| Regulatory Liabilities [Line Items] | |||||||||||||||
| Regulatory Liability, Amortization Period | 1 year | ||||||||||||||
| Contract valuation adjustments | Maximum | |||||||||||||||
| Regulatory Liabilities [Line Items] | |||||||||||||||
| Regulatory Liability, Amortization Period | 2 years | ||||||||||||||
| Deferred electric, natural gas and steam production costs | |||||||||||||||
| Regulatory Liabilities [Line Items] | |||||||||||||||
| Regulatory Liability, Current | $ 39 | 50 | [3] | ||||||||||||
| Regulatory Liability, Noncurrent | 0 | 0 | [3] | ||||||||||||
| Conservation programs | |||||||||||||||
| Regulatory Liabilities [Line Items] | |||||||||||||||
| Regulatory Liability, Current | [6] | 72 | 42 | [3] | |||||||||||
| Regulatory Liability, Noncurrent | [6] | $ 0 | 0 | [3] | |||||||||||
| Conservation programs | Minimum | |||||||||||||||
| Regulatory Liabilities [Line Items] | |||||||||||||||
| Regulatory Liability, Amortization Period | 1 year | ||||||||||||||
| DOE settlement | |||||||||||||||
| Regulatory Liabilities [Line Items] | |||||||||||||||
| Regulatory Liability, Current | $ 12 | 14 | [3] | ||||||||||||
| Regulatory Liability, Noncurrent | 3 | 14 | [3] | ||||||||||||
| Other | |||||||||||||||
| Regulatory Liabilities [Line Items] | |||||||||||||||
| Regulatory Liability, Current | 72 | 54 | [3] | ||||||||||||
| Regulatory Liability, Noncurrent | $ 61 | $ 64 | [3] | ||||||||||||
| |||||||||||||||
Borrowings and Other Financing Instruments Short-Term Debt (Details) - USD ($) $ in Millions |
3 Months Ended | 12 Months Ended | ||
|---|---|---|---|---|
Dec. 31, 2022 |
Dec. 31, 2022 |
Dec. 31, 2021 |
Dec. 31, 2020 |
|
| Short-term Debt [Line Items] | ||||
| Amount outstanding at period end | $ 813 | $ 813 | $ 1,005 | |
| Commercial Paper | ||||
| Short-term Debt [Line Items] | ||||
| Line of Credit Facility, Maximum Borrowing Capacity | 3,550 | 3,550 | 3,100 | $ 3,100 |
| Amount outstanding at period end | 813 | 813 | 1,005 | 584 |
| Average amount outstanding | 416 | 552 | 1,399 | 1,126 |
| Maximum amount outstanding | $ 813 | $ 1,357 | $ 2,054 | $ 2,080 |
| Weighted average interest rate, computed on a daily basis (percentage) | 4.20% | 1.47% | 0.57% | 1.45% |
| Weighted average interest rate at period end (percentage) | 4.66% | 4.66% | 0.31% | 0.23% |
Borrowings and Other Financing Instruments Term Loan Agreement (Details) - USD ($) $ in Millions |
Dec. 31, 2022 |
Dec. 31, 2021 |
|---|---|---|
| Short-term Debt [Line Items] | ||
| Amount outstanding at period end | $ 813 | $ 1,005 |
| Xcel Energy Inc. | ||
| Short-term Debt [Line Items] | ||
| Amount outstanding at period end | $ 231 | $ 638 |
Borrowings and Other Financing Instruments Bilateral Credit Agreement (Details) - USD ($) $ in Millions |
Dec. 31, 2022 |
Dec. 31, 2021 |
|||
|---|---|---|---|---|---|
| Short-term Debt [Line Items] | |||||
| Amount outstanding at period end | $ 813 | $ 1,005 | |||
| Revolving Credit Facility [Member] | |||||
| Short-term Debt [Line Items] | |||||
| Line of Credit Facility, Maximum Borrowing Capacity | 3,550 | ||||
| Letter of Credit | |||||
| Short-term Debt [Line Items] | |||||
| Amount outstanding at period end | 43 | 19 | |||
| NSP Minnesota | Revolving Credit Facility [Member] | |||||
| Short-term Debt [Line Items] | |||||
| Line of Credit Facility, Maximum Borrowing Capacity | 700 | [1] | $ 500 | ||
| NSP Minnesota | Letter of Credit | Bilateral Credit Agreement [Member] | |||||
| Short-term Debt [Line Items] | |||||
| Line of Credit Facility, Maximum Borrowing Capacity | 75 | ||||
| Amount outstanding at period end | $ 54 | ||||
| |||||
Borrowings and Other Financing Instruments Letters of Credit (Details) - USD ($) $ in Millions |
12 Months Ended | ||||
|---|---|---|---|---|---|
Dec. 31, 2022 |
Dec. 31, 2021 |
||||
| Line of Credit Facility [Line Items] | |||||
| Amount outstanding at period end | $ 813 | $ 1,005 | |||
| Xcel Energy Inc. | |||||
| Line of Credit Facility [Line Items] | |||||
| Amount outstanding at period end | $ 231 | 638 | |||
| Letter of Credit | |||||
| Line of Credit Facility [Line Items] | |||||
| Line of Credit Facility, Expiration Period | 1 year | ||||
| Revolving Credit Facility [Member] | |||||
| Line of Credit Facility [Line Items] | |||||
| Line of Credit Facility, Maximum Borrowing Capacity | $ 3,550 | ||||
| Revolving Credit Facility [Member] | Xcel Energy Inc. | |||||
| Line of Credit Facility [Line Items] | |||||
| Line of Credit Facility, Maximum Borrowing Capacity | $ 1,500 | [1] | $ 1,250 | ||
| |||||
Borrowings and Other Financing Instruments Credit Facilities (Details) $ in Millions |
12 Months Ended | ||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
|
Dec. 31, 2022
USD ($)
|
Dec. 31, 2021
USD ($)
|
||||||||||||
| Line of Credit Facility [Line Items] | |||||||||||||
| Amount outstanding at period end | $ 813 | $ 1,005 | |||||||||||
| Letter of Credit | |||||||||||||
| Line of Credit Facility [Line Items] | |||||||||||||
| Amount outstanding at period end | 43 | 19 | |||||||||||
| Revolving Credit Facility [Member] | |||||||||||||
| Line of Credit Facility [Line Items] | |||||||||||||
| Line of Credit Facility, Maximum Borrowing Capacity | 3,550 | ||||||||||||
| Drawn | 857 | ||||||||||||
| Available | 2,693 | ||||||||||||
| Direct advances on the credit facility outstanding | $ 0 | 0 | |||||||||||
| Parent [Member] | Revolving Credit Facility [Member] | |||||||||||||
| Line of Credit Facility [Line Items] | |||||||||||||
| Line Of Credit Facility Maximum Debt To Total Capitalization Ratio Allowed | 65.00% | ||||||||||||
| Line Of Credit Facility Minimum Threshhold Percentage Of Subsidiary Assets To Consolidated Assets Required To Initiate Cross Default Provisions | 15.00% | ||||||||||||
| Line of Credit Facility, Minimum Amount of Indebtedness in Default to Initiate Cross Default Provisions | $ 75 | ||||||||||||
| Xcel Energy Inc. | |||||||||||||
| Line of Credit Facility [Line Items] | |||||||||||||
| Amount outstanding at period end | 231 | 638 | |||||||||||
| Xcel Energy Inc. | Revolving Credit Facility [Member] | |||||||||||||
| Line of Credit Facility [Line Items] | |||||||||||||
| Line of Credit Facility, Maximum Borrowing Capacity | 1,500 | [1] | $ 1,250 | ||||||||||
| Drawn | [2] | 231 | |||||||||||
| Available | $ 1,269 | ||||||||||||
| Xcel Energy Inc. | Revolving Credit Facility [Member] | |||||||||||||
| Line of Credit Facility [Line Items] | |||||||||||||
| Line Of Credit Facility Debt To Total Capitalization Ratio (as a percent) | [3],[4] | 60.00% | 60.00% | ||||||||||
| Line Of Credit Facility Maximum Amount Credit Facility May Be Increased | [4] | $ 350 | |||||||||||
| Number Of Additional Periods Revolving Termination Date Can Be Extended Subject To Majority Bank Group Approval | [4],[5] | 2 | |||||||||||
| NSP-Wisconsin | Revolving Credit Facility [Member] | |||||||||||||
| Line of Credit Facility [Line Items] | |||||||||||||
| Line Of Credit Facility Debt To Total Capitalization Ratio (as a percent) | [3] | 47.00% | 49.00% | ||||||||||
| Number Of Additional Periods Revolving Termination Date Can Be Extended Subject To Majority Bank Group Approval | [5] | 1 | |||||||||||
| Line of Credit Facility, Maximum Borrowing Capacity | [1] | $ 150 | |||||||||||
| Drawn | [2] | 47 | |||||||||||
| Available | $ 103 | ||||||||||||
| NSP Minnesota | Revolving Credit Facility [Member] | |||||||||||||
| Line of Credit Facility [Line Items] | |||||||||||||
| Line Of Credit Facility Debt To Total Capitalization Ratio (as a percent) | [3] | 48.00% | 47.00% | ||||||||||
| Line Of Credit Facility Maximum Amount Credit Facility May Be Increased | $ 150 | ||||||||||||
| Number Of Additional Periods Revolving Termination Date Can Be Extended Subject To Majority Bank Group Approval | [5] | 2 | |||||||||||
| Line of Credit Facility, Maximum Borrowing Capacity | $ 700 | [1] | $ 500 | ||||||||||
| Drawn | [2] | 222 | |||||||||||
| Available | $ 478 | ||||||||||||
| SPS | Revolving Credit Facility [Member] | |||||||||||||
| Line of Credit Facility [Line Items] | |||||||||||||
| Line Of Credit Facility Debt To Total Capitalization Ratio (as a percent) | [3] | 46.00% | 47.00% | ||||||||||
| Line Of Credit Facility Maximum Amount Credit Facility May Be Increased | $ 50 | ||||||||||||
| Number Of Additional Periods Revolving Termination Date Can Be Extended Subject To Majority Bank Group Approval | [5] | 2 | |||||||||||
| Line of Credit Facility, Maximum Borrowing Capacity | [1] | $ 500 | |||||||||||
| Drawn | [2] | 36 | |||||||||||
| Available | $ 464 | ||||||||||||
| PSCo | Revolving Credit Facility [Member] | |||||||||||||
| Line of Credit Facility [Line Items] | |||||||||||||
| Line Of Credit Facility Debt To Total Capitalization Ratio (as a percent) | [3] | 44.00% | 44.00% | ||||||||||
| Line Of Credit Facility Maximum Amount Credit Facility May Be Increased | $ 100 | ||||||||||||
| Number Of Additional Periods Revolving Termination Date Can Be Extended Subject To Majority Bank Group Approval | [5] | 2 | |||||||||||
| Line of Credit Facility, Maximum Borrowing Capacity | [1] | $ 700 | |||||||||||
| Drawn | [2] | 321 | |||||||||||
| Available | $ 379 | ||||||||||||
| |||||||||||||
Borrowings and Other Financing Instruments Amended Credit Agreements (Details) - Revolving Credit Facility [Member] - USD ($) $ in Millions |
Dec. 31, 2022 |
Dec. 31, 2021 |
|||
|---|---|---|---|---|---|
| Line of Credit Facility [Line Items] | |||||
| Line of Credit Facility, Maximum Borrowing Capacity | $ 3,550 | ||||
| Direct advances on the credit facility outstanding | 0 | $ 0 | |||
| NSP Minnesota | |||||
| Line of Credit Facility [Line Items] | |||||
| Line of Credit Facility, Maximum Borrowing Capacity | 700 | [1] | 500 | ||
| Xcel Energy Inc. | |||||
| Line of Credit Facility [Line Items] | |||||
| Line of Credit Facility, Maximum Borrowing Capacity | $ 1,500 | [1] | $ 1,250 | ||
| |||||
Borrowings and Other Financing Instruments Long-Term Borrowings and Other Financing Instruments (Details) - USD ($) $ in Millions |
Dec. 31, 2022 |
Dec. 31, 2021 |
||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Long-Term Borrowings and Other Financing Instruments | ||||||||||||||||||||||
| Long-term Debt, Gross | $ 23,964 | $ 22,380 | ||||||||||||||||||||
| 2021 | 1,151 | |||||||||||||||||||||
| 2022 | 552 | |||||||||||||||||||||
| 2023 | 1,103 | |||||||||||||||||||||
| 2024 | 501 | |||||||||||||||||||||
| 2025 | 501 | |||||||||||||||||||||
| NSP Minnesota | ||||||||||||||||||||||
| Long-Term Borrowings and Other Financing Instruments | ||||||||||||||||||||||
| Unamortized discount | (45) | (44) | ||||||||||||||||||||
| Unamortized Debt Issuance Expense | (66) | (62) | ||||||||||||||||||||
| Current Maturities | (400) | (300) | ||||||||||||||||||||
| Long-term Debt | 6,542 | 6,447 | ||||||||||||||||||||
| NSP Minnesota | Mortgage bonds | Series Due Aug. 15, 2022 [Member] | ||||||||||||||||||||||
| Long-Term Borrowings and Other Financing Instruments | ||||||||||||||||||||||
| Face Amount | $ 0 | 300 | ||||||||||||||||||||
| Debt Instrument, Interest Rate, Stated Percentage | 2.15% | |||||||||||||||||||||
| NSP Minnesota | Mortgage bonds | Series Due May 15, 2023 [Member] | ||||||||||||||||||||||
| Long-Term Borrowings and Other Financing Instruments | ||||||||||||||||||||||
| Face Amount | $ 400 | 400 | ||||||||||||||||||||
| Debt Instrument, Interest Rate, Stated Percentage | 2.60% | |||||||||||||||||||||
| NSP Minnesota | Mortgage bonds | Series Due July 1, 2025 [Member] | ||||||||||||||||||||||
| Long-Term Borrowings and Other Financing Instruments | ||||||||||||||||||||||
| Face Amount | $ 250 | 250 | ||||||||||||||||||||
| Debt Instrument, Interest Rate, Stated Percentage | 7.125% | |||||||||||||||||||||
| NSP Minnesota | Mortgage bonds | Series Due March 1, 2028 [Member] | ||||||||||||||||||||||
| Long-Term Borrowings and Other Financing Instruments | ||||||||||||||||||||||
| Face Amount | $ 150 | 150 | ||||||||||||||||||||
| Debt Instrument, Interest Rate, Stated Percentage | 6.50% | |||||||||||||||||||||
| NSP Minnesota | Mortgage bonds | Series Due April 1, 2031 | ||||||||||||||||||||||
| Long-Term Borrowings and Other Financing Instruments | ||||||||||||||||||||||
| Face Amount | [1] | $ 425 | 425 | |||||||||||||||||||
| Debt Instrument, Interest Rate, Stated Percentage | [1] | 2.25% | ||||||||||||||||||||
| NSP Minnesota | Mortgage bonds | Series Due July 15, 2035 [Member] | ||||||||||||||||||||||
| Long-Term Borrowings and Other Financing Instruments | ||||||||||||||||||||||
| Face Amount | $ 250 | 250 | ||||||||||||||||||||
| Debt Instrument, Interest Rate, Stated Percentage | 5.25% | |||||||||||||||||||||
| NSP Minnesota | Mortgage bonds | Series Due June 1, 2036 [Domain] | ||||||||||||||||||||||
| Long-Term Borrowings and Other Financing Instruments | ||||||||||||||||||||||
| Face Amount | $ 400 | 400 | ||||||||||||||||||||
| Debt Instrument, Interest Rate, Stated Percentage | 6.25% | |||||||||||||||||||||
| NSP Minnesota | Mortgage bonds | Series Due July 1, 2037 [Member] | ||||||||||||||||||||||
| Long-Term Borrowings and Other Financing Instruments | ||||||||||||||||||||||
| Face Amount | $ 350 | 350 | ||||||||||||||||||||
| Debt Instrument, Interest Rate, Stated Percentage | 6.20% | |||||||||||||||||||||
| NSP Minnesota | Mortgage bonds | Series Due Nov. 1, 2039 [Member] | ||||||||||||||||||||||
| Long-Term Borrowings and Other Financing Instruments | ||||||||||||||||||||||
| Face Amount | $ 300 | 300 | ||||||||||||||||||||
| Debt Instrument, Interest Rate, Stated Percentage | 5.35% | |||||||||||||||||||||
| NSP Minnesota | Mortgage bonds | Series Due Aug. 15, 2040 [Member] | ||||||||||||||||||||||
| Long-Term Borrowings and Other Financing Instruments | ||||||||||||||||||||||
| Face Amount | $ 250 | 250 | ||||||||||||||||||||
| Debt Instrument, Interest Rate, Stated Percentage | 4.85% | |||||||||||||||||||||
| NSP Minnesota | Mortgage bonds | Series Due Aug. 15, 2042 [Member] | ||||||||||||||||||||||
| Long-Term Borrowings and Other Financing Instruments | ||||||||||||||||||||||
| Face Amount | $ 500 | 500 | ||||||||||||||||||||
| Debt Instrument, Interest Rate, Stated Percentage | 3.40% | |||||||||||||||||||||
| NSP Minnesota | Mortgage bonds | Series Due May 15, 2044 [Member] | ||||||||||||||||||||||
| Long-Term Borrowings and Other Financing Instruments | ||||||||||||||||||||||
| Face Amount | $ 300 | 300 | ||||||||||||||||||||
| Debt Instrument, Interest Rate, Stated Percentage | 4.125% | |||||||||||||||||||||
| NSP Minnesota | Mortgage bonds | Series Due Aug. 15, 2045 [Member] | ||||||||||||||||||||||
| Long-Term Borrowings and Other Financing Instruments | ||||||||||||||||||||||
| Face Amount | $ 300 | 300 | ||||||||||||||||||||
| Debt Instrument, Interest Rate, Stated Percentage | 4.00% | |||||||||||||||||||||
| NSP Minnesota | Mortgage bonds | Series Due May 15, 2046 [Member] | ||||||||||||||||||||||
| Long-Term Borrowings and Other Financing Instruments | ||||||||||||||||||||||
| Face Amount | $ 350 | 350 | ||||||||||||||||||||
| Debt Instrument, Interest Rate, Stated Percentage | 3.60% | |||||||||||||||||||||
| NSP Minnesota | Mortgage bonds | Series Due Sept. 15, 2047 | ||||||||||||||||||||||
| Long-Term Borrowings and Other Financing Instruments | ||||||||||||||||||||||
| Face Amount | $ 600 | 600 | ||||||||||||||||||||
| Debt Instrument, Interest Rate, Stated Percentage | 3.60% | |||||||||||||||||||||
| NSP Minnesota | Mortgage bonds | Series Due March 1, 2050 | ||||||||||||||||||||||
| Long-Term Borrowings and Other Financing Instruments | ||||||||||||||||||||||
| Face Amount | $ 600 | 600 | ||||||||||||||||||||
| Debt Instrument, Interest Rate, Stated Percentage | 2.90% | |||||||||||||||||||||
| NSP Minnesota | Mortgage bonds | Series Due June 1, 2051 | ||||||||||||||||||||||
| Long-Term Borrowings and Other Financing Instruments | ||||||||||||||||||||||
| Face Amount | $ 700 | 700 | ||||||||||||||||||||
| Debt Instrument, Interest Rate, Stated Percentage | 2.60% | |||||||||||||||||||||
| NSP Minnesota | Mortgage bonds | Series Due April 1, 2052 | ||||||||||||||||||||||
| Long-Term Borrowings and Other Financing Instruments | ||||||||||||||||||||||
| Face Amount | [1] | $ 425 | 425 | |||||||||||||||||||
| Debt Instrument, Interest Rate, Stated Percentage | [1] | 3.20% | ||||||||||||||||||||
| NSP Minnesota | Mortgage bonds | Series Due June 1, 2052 | ||||||||||||||||||||||
| Long-Term Borrowings and Other Financing Instruments | ||||||||||||||||||||||
| Face Amount | [2] | $ 500 | 0 | |||||||||||||||||||
| Debt Instrument, Interest Rate, Stated Percentage | [2] | 4.50% | ||||||||||||||||||||
| NSP Minnesota | Long-term Debt | ||||||||||||||||||||||
| Long-Term Borrowings and Other Financing Instruments | ||||||||||||||||||||||
| Face Amount | $ 3 | 3 | ||||||||||||||||||||
| Other Subsidiaries | ||||||||||||||||||||||
| Long-Term Borrowings and Other Financing Instruments | ||||||||||||||||||||||
| Current Maturities | (1) | (1) | ||||||||||||||||||||
| Long-term Debt | 26 | 26 | ||||||||||||||||||||
| Other Subsidiaries | Various Eloigne Co. affordable housing project notes | ||||||||||||||||||||||
| Long-Term Borrowings and Other Financing Instruments | ||||||||||||||||||||||
| Long-term Debt, Gross | 27 | 27 | ||||||||||||||||||||
| Xcel Energy Inc. | ||||||||||||||||||||||
| Long-Term Borrowings and Other Financing Instruments | ||||||||||||||||||||||
| Unamortized discount | (7) | (8) | ||||||||||||||||||||
| Unamortized Debt Issuance Expense | (35) | (33) | ||||||||||||||||||||
| Current Maturities | (500) | 0 | ||||||||||||||||||||
| Long-term Debt | 5,338 | 5,139 | ||||||||||||||||||||
| Xcel Energy Inc. | Unsecured Debt [Member] | Series Due Oct. 15, 2023 [Member] | ||||||||||||||||||||||
| Long-Term Borrowings and Other Financing Instruments | ||||||||||||||||||||||
| Face Amount | $ 500 | 500 | ||||||||||||||||||||
| Debt Instrument, Interest Rate, Stated Percentage | 0.50% | |||||||||||||||||||||
| Xcel Energy Inc. | Unsecured Debt [Member] | Series Due June 1, 2025 [Member] | ||||||||||||||||||||||
| Long-Term Borrowings and Other Financing Instruments | ||||||||||||||||||||||
| Face Amount | $ 250 | 250 | ||||||||||||||||||||
| Debt Instrument, Interest Rate, Stated Percentage | 3.30% | |||||||||||||||||||||
| Xcel Energy Inc. | Unsecured Debt [Member] | Series Due June 1, 2025 2 [Member] | ||||||||||||||||||||||
| Long-Term Borrowings and Other Financing Instruments | ||||||||||||||||||||||
| Face Amount | $ 350 | 350 | ||||||||||||||||||||
| Debt Instrument, Interest Rate, Stated Percentage | 3.30% | |||||||||||||||||||||
| Xcel Energy Inc. | Unsecured Debt [Member] | Series Due Dec. 1, 2026 [Member] | ||||||||||||||||||||||
| Long-Term Borrowings and Other Financing Instruments | ||||||||||||||||||||||
| Face Amount | $ 500 | 500 | ||||||||||||||||||||
| Debt Instrument, Interest Rate, Stated Percentage | 3.35% | |||||||||||||||||||||
| Xcel Energy Inc. | Unsecured Debt [Member] | Series Due March 15, 2027 | ||||||||||||||||||||||
| Long-Term Borrowings and Other Financing Instruments | ||||||||||||||||||||||
| Face Amount | [3] | $ 500 | 500 | |||||||||||||||||||
| Debt Instrument, Interest Rate, Stated Percentage | [3] | 1.75% | ||||||||||||||||||||
| Xcel Energy Inc. | Unsecured Debt [Member] | Series Due June 15, 2028 | ||||||||||||||||||||||
| Long-Term Borrowings and Other Financing Instruments | ||||||||||||||||||||||
| Face Amount | $ 130 | 130 | ||||||||||||||||||||
| Debt Instrument, Interest Rate, Stated Percentage | 4.00% | |||||||||||||||||||||
| Xcel Energy Inc. | Unsecured Debt [Member] | Series Due June 15, 2028 2 [Member] | ||||||||||||||||||||||
| Long-Term Borrowings and Other Financing Instruments | ||||||||||||||||||||||
| Face Amount | $ 500 | 500 | ||||||||||||||||||||
| Debt Instrument, Interest Rate, Stated Percentage | 4.00% | |||||||||||||||||||||
| Xcel Energy Inc. | Unsecured Debt [Member] | Series Due Dec. 1, 2029 [Member] | ||||||||||||||||||||||
| Long-Term Borrowings and Other Financing Instruments | ||||||||||||||||||||||
| Face Amount | $ 500 | 500 | ||||||||||||||||||||
| Debt Instrument, Interest Rate, Stated Percentage | 2.60% | |||||||||||||||||||||
| Xcel Energy Inc. | Unsecured Debt [Member] | Series Due June 1, 2030 | ||||||||||||||||||||||
| Long-Term Borrowings and Other Financing Instruments | ||||||||||||||||||||||
| Face Amount | $ 600 | 600 | ||||||||||||||||||||
| Debt Instrument, Interest Rate, Stated Percentage | 3.40% | |||||||||||||||||||||
| Xcel Energy Inc. | Unsecured Debt [Member] | Series Due Nov. 15, 2031 | ||||||||||||||||||||||
| Long-Term Borrowings and Other Financing Instruments | ||||||||||||||||||||||
| Face Amount | [3] | $ 300 | 300 | |||||||||||||||||||
| Debt Instrument, Interest Rate, Stated Percentage | [3] | 2.35% | ||||||||||||||||||||
| Xcel Energy Inc. | Unsecured Debt [Member] | Series Due July 1, 2036 [Member] | ||||||||||||||||||||||
| Long-Term Borrowings and Other Financing Instruments | ||||||||||||||||||||||
| Face Amount | $ 300 | 300 | ||||||||||||||||||||
| Debt Instrument, Interest Rate, Stated Percentage | 6.50% | |||||||||||||||||||||
| Xcel Energy Inc. | Unsecured Debt [Member] | Series Due Sept. 15, 2041 [Member] | ||||||||||||||||||||||
| Long-Term Borrowings and Other Financing Instruments | ||||||||||||||||||||||
| Face Amount | $ 250 | 250 | ||||||||||||||||||||
| Debt Instrument, Interest Rate, Stated Percentage | 4.80% | |||||||||||||||||||||
| Xcel Energy Inc. | Unsecured Debt [Member] | Series Due Dec. 1, 2049 [Member] | ||||||||||||||||||||||
| Long-Term Borrowings and Other Financing Instruments | ||||||||||||||||||||||
| Face Amount | $ 500 | 500 | ||||||||||||||||||||
| Debt Instrument, Interest Rate, Stated Percentage | 3.50% | |||||||||||||||||||||
| Xcel Energy Inc. | Unsecured Debt [Member] | Series Due June 1, 2032 | ||||||||||||||||||||||
| Long-Term Borrowings and Other Financing Instruments | ||||||||||||||||||||||
| Face Amount | [4] | $ 700 | 0 | |||||||||||||||||||
| Debt Instrument, Interest Rate, Stated Percentage | [4] | 4.60% | ||||||||||||||||||||
| NSP-Wisconsin | ||||||||||||||||||||||
| Long-Term Borrowings and Other Financing Instruments | ||||||||||||||||||||||
| Unamortized discount | $ (3) | (4) | ||||||||||||||||||||
| Unamortized Debt Issuance Expense | (11) | (10) | ||||||||||||||||||||
| Long-term Debt | 1,086 | 987 | ||||||||||||||||||||
| NSP-Wisconsin | Mortgage bonds | Series Due Sept. 1, 2038 [Member] | ||||||||||||||||||||||
| Long-Term Borrowings and Other Financing Instruments | ||||||||||||||||||||||
| Face Amount | $ 200 | 200 | ||||||||||||||||||||
| Debt Instrument, Interest Rate, Stated Percentage | 6.375% | |||||||||||||||||||||
| NSP-Wisconsin | Mortgage bonds | Series Due Oct. 1, 2042 [Member] | ||||||||||||||||||||||
| Long-Term Borrowings and Other Financing Instruments | ||||||||||||||||||||||
| Face Amount | $ 100 | 100 | ||||||||||||||||||||
| Debt Instrument, Interest Rate, Stated Percentage | 3.70% | |||||||||||||||||||||
| NSP-Wisconsin | Mortgage bonds | Series Due Dec. 1, 2047 | ||||||||||||||||||||||
| Long-Term Borrowings and Other Financing Instruments | ||||||||||||||||||||||
| Face Amount | $ 100 | 100 | ||||||||||||||||||||
| Debt Instrument, Interest Rate, Stated Percentage | 3.75% | |||||||||||||||||||||
| NSP-Wisconsin | Mortgage bonds | Series Due September 1, 2048 [Member] | ||||||||||||||||||||||
| Long-Term Borrowings and Other Financing Instruments | ||||||||||||||||||||||
| Face Amount | $ 200 | 200 | ||||||||||||||||||||
| Debt Instrument, Interest Rate, Stated Percentage | 4.20% | |||||||||||||||||||||
| NSP-Wisconsin | Mortgage bonds | Series Due May 1, 2051 | ||||||||||||||||||||||
| Long-Term Borrowings and Other Financing Instruments | ||||||||||||||||||||||
| Face Amount | $ 100 | 100 | ||||||||||||||||||||
| Debt Instrument, Interest Rate, Stated Percentage | 3.05% | |||||||||||||||||||||
| NSP-Wisconsin | Mortgage bonds | Series Due May 1, 2051 2 | ||||||||||||||||||||||
| Long-Term Borrowings and Other Financing Instruments | ||||||||||||||||||||||
| Face Amount | [5] | $ 100 | 100 | |||||||||||||||||||
| Debt Instrument, Interest Rate, Stated Percentage | [5] | 2.82% | ||||||||||||||||||||
| NSP-Wisconsin | Mortgage bonds | Series Due June 15, 2024 [Member] | ||||||||||||||||||||||
| Long-Term Borrowings and Other Financing Instruments | ||||||||||||||||||||||
| Face Amount | $ 100 | 100 | ||||||||||||||||||||
| Debt Instrument, Interest Rate, Stated Percentage | 3.30% | |||||||||||||||||||||
| NSP-Wisconsin | Mortgage bonds | Series Due June 15, 2024 2 [Member] | ||||||||||||||||||||||
| Long-Term Borrowings and Other Financing Instruments | ||||||||||||||||||||||
| Face Amount | $ 100 | 100 | ||||||||||||||||||||
| Debt Instrument, Interest Rate, Stated Percentage | 3.30% | |||||||||||||||||||||
| NSP-Wisconsin | Mortgage bonds | Series Due Sept. 15, 2052 | ||||||||||||||||||||||
| Long-Term Borrowings and Other Financing Instruments | ||||||||||||||||||||||
| Face Amount | [6] | $ 100 | 0 | |||||||||||||||||||
| Debt Instrument, Interest Rate, Stated Percentage | [6] | 4.86% | ||||||||||||||||||||
| NSP-Wisconsin | Long-term Debt | ||||||||||||||||||||||
| Long-Term Borrowings and Other Financing Instruments | ||||||||||||||||||||||
| Face Amount | $ 0 | 1 | ||||||||||||||||||||
| PSCo | ||||||||||||||||||||||
| Long-Term Borrowings and Other Financing Instruments | ||||||||||||||||||||||
| Unamortized discount | (37) | (33) | ||||||||||||||||||||
| Unamortized Debt Issuance Expense | (53) | (50) | ||||||||||||||||||||
| Current Maturities | (250) | (300) | ||||||||||||||||||||
| Long-term Debt | 6,610 | 6,167 | ||||||||||||||||||||
| PSCo | Mortgage bonds | Series Due June 15, 2028 | ||||||||||||||||||||||
| Long-Term Borrowings and Other Financing Instruments | ||||||||||||||||||||||
| Face Amount | $ 350 | 350 | ||||||||||||||||||||
| Debt Instrument, Interest Rate, Stated Percentage | 3.70% | |||||||||||||||||||||
| PSCo | Mortgage bonds | Series Due March 1, 2050 | ||||||||||||||||||||||
| Long-Term Borrowings and Other Financing Instruments | ||||||||||||||||||||||
| Face Amount | $ 550 | 550 | ||||||||||||||||||||
| Debt Instrument, Interest Rate, Stated Percentage | 3.20% | |||||||||||||||||||||
| PSCo | Mortgage bonds | Series Due Sept. 15, 2022 [Member] | ||||||||||||||||||||||
| Long-Term Borrowings and Other Financing Instruments | ||||||||||||||||||||||
| Face Amount | $ 0 | 300 | ||||||||||||||||||||
| Debt Instrument, Interest Rate, Stated Percentage | 2.25% | |||||||||||||||||||||
| PSCo | Mortgage bonds | Series Due March 15, 2023 [Member] | ||||||||||||||||||||||
| Long-Term Borrowings and Other Financing Instruments | ||||||||||||||||||||||
| Face Amount | $ 250 | 250 | ||||||||||||||||||||
| Debt Instrument, Interest Rate, Stated Percentage | 2.50% | |||||||||||||||||||||
| PSCo | Mortgage bonds | Series Due May 15, 2025 [Member] | ||||||||||||||||||||||
| Long-Term Borrowings and Other Financing Instruments | ||||||||||||||||||||||
| Face Amount | $ 250 | 250 | ||||||||||||||||||||
| Debt Instrument, Interest Rate, Stated Percentage | 2.90% | |||||||||||||||||||||
| PSCo | Mortgage bonds | Series Due Jan. 15, 2031 | ||||||||||||||||||||||
| Long-Term Borrowings and Other Financing Instruments | ||||||||||||||||||||||
| Face Amount | $ 375 | 375 | ||||||||||||||||||||
| Debt Instrument, Interest Rate, Stated Percentage | 1.90% | |||||||||||||||||||||
| PSCo | Mortgage bonds | Series Due June 15, 2031 | ||||||||||||||||||||||
| Long-Term Borrowings and Other Financing Instruments | ||||||||||||||||||||||
| Face Amount | [7] | $ 750 | 750 | |||||||||||||||||||
| Debt Instrument, Interest Rate, Stated Percentage | [7] | 1.875% | ||||||||||||||||||||
| PSCo | Mortgage bonds | Series Due Sept. 1, 2037 [Member] | ||||||||||||||||||||||
| Long-Term Borrowings and Other Financing Instruments | ||||||||||||||||||||||
| Face Amount | $ 350 | 350 | ||||||||||||||||||||
| Debt Instrument, Interest Rate, Stated Percentage | 6.25% | |||||||||||||||||||||
| PSCo | Mortgage bonds | Series Due Aug. 1, 2038 [Member] | ||||||||||||||||||||||
| Long-Term Borrowings and Other Financing Instruments | ||||||||||||||||||||||
| Face Amount | $ 300 | 300 | ||||||||||||||||||||
| Debt Instrument, Interest Rate, Stated Percentage | 6.50% | |||||||||||||||||||||
| PSCo | Mortgage bonds | Series Due Aug. 15, 2041 [Member] | ||||||||||||||||||||||
| Long-Term Borrowings and Other Financing Instruments | ||||||||||||||||||||||
| Face Amount | $ 250 | 250 | ||||||||||||||||||||
| Debt Instrument, Interest Rate, Stated Percentage | 4.75% | |||||||||||||||||||||
| PSCo | Mortgage bonds | Series Due Sept. 15, 2042 [Member] | ||||||||||||||||||||||
| Long-Term Borrowings and Other Financing Instruments | ||||||||||||||||||||||
| Face Amount | $ 500 | 500 | ||||||||||||||||||||
| Debt Instrument, Interest Rate, Stated Percentage | 3.60% | |||||||||||||||||||||
| PSCo | Mortgage bonds | Series Due March 15, 2043 [Member] | ||||||||||||||||||||||
| Long-Term Borrowings and Other Financing Instruments | ||||||||||||||||||||||
| Face Amount | $ 250 | 250 | ||||||||||||||||||||
| Debt Instrument, Interest Rate, Stated Percentage | 3.95% | |||||||||||||||||||||
| PSCo | Mortgage bonds | Series Due March 15, 2044 [Member] | ||||||||||||||||||||||
| Long-Term Borrowings and Other Financing Instruments | ||||||||||||||||||||||
| Face Amount | $ 300 | 300 | ||||||||||||||||||||
| Debt Instrument, Interest Rate, Stated Percentage | 4.30% | |||||||||||||||||||||
| PSCo | Mortgage bonds | Series Due June 15, 2046 [Member] | ||||||||||||||||||||||
| Long-Term Borrowings and Other Financing Instruments | ||||||||||||||||||||||
| Face Amount | $ 250 | 250 | ||||||||||||||||||||
| Debt Instrument, Interest Rate, Stated Percentage | 3.55% | |||||||||||||||||||||
| PSCo | Mortgage bonds | Series Due June 15, 2047 | ||||||||||||||||||||||
| Long-Term Borrowings and Other Financing Instruments | ||||||||||||||||||||||
| Face Amount | $ 400 | 400 | ||||||||||||||||||||
| Debt Instrument, Interest Rate, Stated Percentage | 3.80% | |||||||||||||||||||||
| PSCo | Mortgage bonds | Series Due June 15, 2048 | ||||||||||||||||||||||
| Long-Term Borrowings and Other Financing Instruments | ||||||||||||||||||||||
| Face Amount | $ 350 | 350 | ||||||||||||||||||||
| Debt Instrument, Interest Rate, Stated Percentage | 4.10% | |||||||||||||||||||||
| PSCo | Mortgage bonds | Series Due September 15, 2049 | ||||||||||||||||||||||
| Long-Term Borrowings and Other Financing Instruments | ||||||||||||||||||||||
| Face Amount | $ 400 | 400 | ||||||||||||||||||||
| Debt Instrument, Interest Rate, Stated Percentage | 4.05% | |||||||||||||||||||||
| PSCo | Mortgage bonds | Series Due Jan. 15, 2051 | ||||||||||||||||||||||
| Long-Term Borrowings and Other Financing Instruments | ||||||||||||||||||||||
| Face Amount | $ 375 | 375 | ||||||||||||||||||||
| Debt Instrument, Interest Rate, Stated Percentage | 2.70% | |||||||||||||||||||||
| PSCo | Mortgage bonds | Series Due June 1, 2052 | ||||||||||||||||||||||
| Long-Term Borrowings and Other Financing Instruments | ||||||||||||||||||||||
| Face Amount | [8] | $ 400 | 0 | |||||||||||||||||||
| Debt Instrument, Interest Rate, Stated Percentage | [8] | 4.50% | ||||||||||||||||||||
| PSCo | Mortgage bonds | Series Due June 1, 2032 2 | ||||||||||||||||||||||
| Long-Term Borrowings and Other Financing Instruments | ||||||||||||||||||||||
| Face Amount | [8] | $ 300 | 0 | |||||||||||||||||||
| Debt Instrument, Interest Rate, Stated Percentage | [8] | 4.10% | ||||||||||||||||||||
| SPS | ||||||||||||||||||||||
| Long-Term Borrowings and Other Financing Instruments | ||||||||||||||||||||||
| Unamortized discount | $ (10) | (9) | ||||||||||||||||||||
| Unamortized Debt Issuance Expense | (29) | (28) | ||||||||||||||||||||
| Long-term Debt | 3,211 | 3,013 | ||||||||||||||||||||
| SPS | Mortgage bonds | Series Due June 15, 2024 [Member] | ||||||||||||||||||||||
| Long-Term Borrowings and Other Financing Instruments | ||||||||||||||||||||||
| Face Amount | $ 150 | 150 | ||||||||||||||||||||
| Debt Instrument, Interest Rate, Stated Percentage | 3.30% | |||||||||||||||||||||
| SPS | Mortgage bonds | Series Due June 15, 2024 2 [Member] | ||||||||||||||||||||||
| Long-Term Borrowings and Other Financing Instruments | ||||||||||||||||||||||
| Face Amount | $ 200 | 200 | ||||||||||||||||||||
| Debt Instrument, Interest Rate, Stated Percentage | 3.30% | |||||||||||||||||||||
| SPS | Mortgage bonds | Series Due Aug. 15, 2041 4 | ||||||||||||||||||||||
| Long-Term Borrowings and Other Financing Instruments | ||||||||||||||||||||||
| Face Amount | $ 200 | 200 | ||||||||||||||||||||
| Debt Instrument, Interest Rate, Stated Percentage | 4.50% | |||||||||||||||||||||
| SPS | Mortgage bonds | Series Due Aug. 15, 2041 2 [Member] | ||||||||||||||||||||||
| Long-Term Borrowings and Other Financing Instruments | ||||||||||||||||||||||
| Face Amount | $ 100 | 100 | ||||||||||||||||||||
| Debt Instrument, Interest Rate, Stated Percentage | 4.50% | |||||||||||||||||||||
| SPS | Mortgage bonds | Series Due Aug. 15, 2041 3 [Member] | ||||||||||||||||||||||
| Long-Term Borrowings and Other Financing Instruments | ||||||||||||||||||||||
| Face Amount | $ 100 | 100 | ||||||||||||||||||||
| Debt Instrument, Interest Rate, Stated Percentage | 4.50% | |||||||||||||||||||||
| SPS | Mortgage bonds | Series Due August 15, 2046 [Member] | ||||||||||||||||||||||
| Long-Term Borrowings and Other Financing Instruments | ||||||||||||||||||||||
| Face Amount | $ 300 | 300 | ||||||||||||||||||||
| Debt Instrument, Interest Rate, Stated Percentage | 3.40% | |||||||||||||||||||||
| SPS | Mortgage bonds | Series Due August 15, 2047 | ||||||||||||||||||||||
| Long-Term Borrowings and Other Financing Instruments | ||||||||||||||||||||||
| Face Amount | $ 450 | 450 | ||||||||||||||||||||
| Debt Instrument, Interest Rate, Stated Percentage | 3.70% | |||||||||||||||||||||
| SPS | Mortgage bonds | Series Due Nov. 15, 2048 [Member] | ||||||||||||||||||||||
| Long-Term Borrowings and Other Financing Instruments | ||||||||||||||||||||||
| Face Amount | $ 300 | 300 | ||||||||||||||||||||
| Debt Instrument, Interest Rate, Stated Percentage | 4.40% | |||||||||||||||||||||
| SPS | Mortgage bonds | Series Due June 15, 2049 | ||||||||||||||||||||||
| Long-Term Borrowings and Other Financing Instruments | ||||||||||||||||||||||
| Face Amount | $ 300 | 300 | ||||||||||||||||||||
| Debt Instrument, Interest Rate, Stated Percentage | 3.75% | |||||||||||||||||||||
| SPS | Mortgage bonds | Series due May 1, 2050 | ||||||||||||||||||||||
| Long-Term Borrowings and Other Financing Instruments | ||||||||||||||||||||||
| Face Amount | $ 350 | 350 | ||||||||||||||||||||
| Debt Instrument, Interest Rate, Stated Percentage | 3.15% | |||||||||||||||||||||
| SPS | Mortgage bonds | Series due May 1, 2050 2 | ||||||||||||||||||||||
| Long-Term Borrowings and Other Financing Instruments | ||||||||||||||||||||||
| Face Amount | [9] | $ 250 | 250 | |||||||||||||||||||
| Debt Instrument, Interest Rate, Stated Percentage | [9] | 3.15% | ||||||||||||||||||||
| SPS | Mortgage bonds | Series Due June 1, 2052 | ||||||||||||||||||||||
| Long-Term Borrowings and Other Financing Instruments | ||||||||||||||||||||||
| Face Amount | [10] | $ 200 | 0 | |||||||||||||||||||
| Debt Instrument, Interest Rate, Stated Percentage | [10] | 5.15% | ||||||||||||||||||||
| SPS | Unsecured Debt [Member] | Senior C and D Due Oct. 1, 2033 [Member] | ||||||||||||||||||||||
| Long-Term Borrowings and Other Financing Instruments | ||||||||||||||||||||||
| Face Amount | $ 100 | 100 | ||||||||||||||||||||
| Debt Instrument, Interest Rate, Stated Percentage | 6.00% | |||||||||||||||||||||
| SPS | Unsecured Debt [Member] | Senior F Due Oct. 1, 2036 [Member] | ||||||||||||||||||||||
| Long-Term Borrowings and Other Financing Instruments | ||||||||||||||||||||||
| Face Amount | $ 250 | $ 250 | ||||||||||||||||||||
| Debt Instrument, Interest Rate, Stated Percentage | 6.00% | |||||||||||||||||||||
| ||||||||||||||||||||||
Borrowings and Other Financing Instruments Deferred Financing Costs (Details) - USD ($) $ in Millions |
Dec. 31, 2022 |
Dec. 31, 2021 |
|---|---|---|
| Deferred Financing Costs [Abstract] | ||
| Deferred Finance Costs, Noncurrent, Net | $ 193 | $ 184 |
Borrowings and Other Financing Instruments Other Equity (Details) - USD ($) $ in Millions |
12 Months Ended | ||
|---|---|---|---|
Dec. 31, 2022 |
Dec. 31, 2021 |
Dec. 31, 2020 |
|
| Dividend Reinvestment Program [Line Items] | |||
| Proceeds from Issuance of Common Stock | $ 322 | $ 366 | $ 727 |
| DividendReinvestmentProgram [Member] | |||
| Dividend Reinvestment Program [Line Items] | |||
| Proceeds from Issuance of Common Stock | $ 84 | $ 74 | |
Borrowings and Other Financing Instruments Capital Stock (Details) - $ / shares |
Dec. 31, 2022 |
Dec. 31, 2021 |
|---|---|---|
| Debt Instrument [Line Items] | ||
| Common Stock, Shares Authorized (in shares) | 1,000,000,000 | 1,000,000,000 |
| Common Stock, Par Value (in dollars per share) | $ 2.50 | $ 2.50 |
| Common Stock, Shares Outstanding (in shares) | 549,578,018 | 544,025,269 |
| Xcel Energy Inc. | ||
| Debt Instrument [Line Items] | ||
| Preferred Stock, Shares Authorized (in shares) | 7,000,000 | |
| Preferred Stock, Par Value (in dollars per share) | $ 100 | |
| Preferred Stock, Shares Outstanding (in shares) | 0 | 0 |
| PSCo | ||
| Debt Instrument [Line Items] | ||
| Preferred Stock, Shares Authorized (in shares) | 10,000,000 | |
| Preferred Stock, Par Value (in dollars per share) | $ 0.01 | |
| Preferred Stock, Shares Outstanding (in shares) | 0 | 0 |
| SPS | ||
| Debt Instrument [Line Items] | ||
| Preferred Stock, Shares Authorized (in shares) | 10,000,000 | |
| Preferred Stock, Par Value (in dollars per share) | $ 1.00 | |
| Preferred Stock, Shares Outstanding (in shares) | 0 | 0 |
Borrowings and Other Financing Instruments Dividend and Other Capital-Related Restrictions (Details) $ in Millions |
Dec. 31, 2022
USD ($)
|
|||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| NSP Minnesota | ||||||||||
| Debt Instrument [Line Items] | ||||||||||
| Equity to total capitalization ratio, low end of range (in hundredths) | 47.20% | |||||||||
| Equity to total capitalization ratio, high end of range (in hundredths) | 57.60% | |||||||||
| Equity to total capitalization ratio | 52.30% | |||||||||
| Unrestricted Retained Earnings Per State Regulatory Commissions Dividend Restrictions | $ 1,446 | |||||||||
| Capitalization, Short term debt, long term debt and equity | 14,984 | |||||||||
| Maximum total capitalization | 16,140 | |||||||||
| Maximum additional short term debt authorized for issuance | $ 2,400 | [1] | ||||||||
| Maximum percentage of short term debt to total capitalization (in hundredths) | 15.00% | |||||||||
| NSP-Wisconsin | ||||||||||
| Debt Instrument [Line Items] | ||||||||||
| Minimum calendar year average equity to total capitalization ratio authorized by state commission | 52.50% | |||||||||
| Equity to total capitalization ratio | 52.80% | |||||||||
| Unrestricted Retained Earnings Per State Regulatory Commissions Dividend Restrictions | $ 11 | [2] | ||||||||
| Capitalization, Short term debt, long term debt and equity | 2,280 | [2] | ||||||||
| Maximum additional long term debt authorized for issuance | 50 | |||||||||
| Maximum additional short term debt authorized for issuance | $ 150 | |||||||||
| SPS | ||||||||||
| Debt Instrument [Line Items] | ||||||||||
| Equity to total capitalization ratio (excluding short-term debt), low end of range (in hundredths) | 45.00% | [3] | ||||||||
| Equity to total capitalization ratio (excluding short-term debt), high end of range (in hundredths) | 55.00% | [3] | ||||||||
| Equity to total capitalization ratio (excluding short-term debt) (in hundredths) | 54.30% | [3] | ||||||||
| Unrestricted Retained Earnings Per State Regulatory Commissions Dividend Restrictions | $ 540 | [4] | ||||||||
| Capitalization, Short term debt, long term debt and equity | 7,094,000 | [4] | ||||||||
| Maximum additional long term debt authorized for issuance | 0 | |||||||||
| Maximum additional short term debt authorized for issuance | 600 | |||||||||
| PSCo | ||||||||||
| Debt Instrument [Line Items] | ||||||||||
| Maximum additional long term debt authorized for issuance | 1,300 | |||||||||
| Maximum additional short term debt authorized for issuance | $ 800 | |||||||||
| ||||||||||
Revenues (Details) - USD ($) $ in Millions |
12 Months Ended | ||
|---|---|---|---|
Dec. 31, 2022 |
Dec. 31, 2021 |
Dec. 31, 2020 |
|
| Total revenue from contracts with customers | |||
| Disaggregation of Revenue [Line Items] | |||
| Revenue from Contracts with Customers | $ 14,708 | $ 12,668 | $ 10,847 |
| Total revenue from contracts with customers | Regulated Electric | |||
| Disaggregation of Revenue [Line Items] | |||
| Revenue from Contracts with Customers | 11,623 | 10,576 | 9,198 |
| Total revenue from contracts with customers | Natural Gas | |||
| Disaggregation of Revenue [Line Items] | |||
| Revenue from Contracts with Customers | 2,990 | 2,010 | 1,574 |
| Total revenue from contracts with customers | All Other | |||
| Disaggregation of Revenue [Line Items] | |||
| Revenue from Contracts with Customers | 95 | 82 | 75 |
| Retail | |||
| Disaggregation of Revenue [Line Items] | |||
| Revenue from Contracts with Customers | 12,404 | 10,315 | 9,299 |
| Retail | Residential | |||
| Disaggregation of Revenue [Line Items] | |||
| Revenue from Contracts with Customers | 5,409 | 4,461 | 4,083 |
| Retail | C&I | |||
| Disaggregation of Revenue [Line Items] | |||
| Revenue from Contracts with Customers | 6,837 | 5,720 | 5,085 |
| Retail | Other | |||
| Disaggregation of Revenue [Line Items] | |||
| Revenue from Contracts with Customers | 158 | 134 | 131 |
| Retail | Regulated Electric | |||
| Disaggregation of Revenue [Line Items] | |||
| Revenue from Contracts with Customers | 9,497 | 8,371 | 7,787 |
| Retail | Regulated Electric | Residential | |||
| Disaggregation of Revenue [Line Items] | |||
| Revenue from Contracts with Customers | 3,542 | 3,194 | 3,066 |
| Retail | Regulated Electric | C&I | |||
| Disaggregation of Revenue [Line Items] | |||
| Revenue from Contracts with Customers | 5,807 | 5,050 | 4,596 |
| Retail | Regulated Electric | Other | |||
| Disaggregation of Revenue [Line Items] | |||
| Revenue from Contracts with Customers | 148 | 127 | 125 |
| Retail | Natural Gas | |||
| Disaggregation of Revenue [Line Items] | |||
| Revenue from Contracts with Customers | 2,812 | 1,862 | 1,437 |
| Retail | Natural Gas | Residential | |||
| Disaggregation of Revenue [Line Items] | |||
| Revenue from Contracts with Customers | 1,814 | 1,222 | 975 |
| Retail | Natural Gas | C&I | |||
| Disaggregation of Revenue [Line Items] | |||
| Revenue from Contracts with Customers | 998 | 640 | 462 |
| Retail | Natural Gas | Other | |||
| Disaggregation of Revenue [Line Items] | |||
| Revenue from Contracts with Customers | 0 | 0 | 0 |
| Retail | All Other | |||
| Disaggregation of Revenue [Line Items] | |||
| Revenue from Contracts with Customers | 95 | 82 | 75 |
| Retail | All Other | Residential | |||
| Disaggregation of Revenue [Line Items] | |||
| Revenue from Contracts with Customers | 53 | 45 | 42 |
| Retail | All Other | C&I | |||
| Disaggregation of Revenue [Line Items] | |||
| Revenue from Contracts with Customers | 32 | 30 | 27 |
| Retail | All Other | Other | |||
| Disaggregation of Revenue [Line Items] | |||
| Revenue from Contracts with Customers | 10 | 7 | 6 |
| Wholesale | |||
| Disaggregation of Revenue [Line Items] | |||
| Revenue from Contracts with Customers | 1,354 | 1,540 | 759 |
| Wholesale | Regulated Electric | |||
| Disaggregation of Revenue [Line Items] | |||
| Revenue from Contracts with Customers | 1,354 | 1,540 | 759 |
| Wholesale | Natural Gas | |||
| Disaggregation of Revenue [Line Items] | |||
| Revenue from Contracts with Customers | 0 | 0 | 0 |
| Wholesale | All Other | |||
| Disaggregation of Revenue [Line Items] | |||
| Revenue from Contracts with Customers | 0 | 0 | 0 |
| Transmission | |||
| Disaggregation of Revenue [Line Items] | |||
| Revenue from Contracts with Customers | 675 | 604 | 579 |
| Transmission | Regulated Electric | |||
| Disaggregation of Revenue [Line Items] | |||
| Revenue from Contracts with Customers | 675 | 604 | 579 |
| Transmission | Natural Gas | |||
| Disaggregation of Revenue [Line Items] | |||
| Revenue from Contracts with Customers | 0 | 0 | 0 |
| Transmission | All Other | |||
| Disaggregation of Revenue [Line Items] | |||
| Revenue from Contracts with Customers | 0 | 0 | 0 |
| Other | |||
| Disaggregation of Revenue [Line Items] | |||
| Revenue from Contracts with Customers | 275 | 209 | 210 |
| Other | Regulated Electric | |||
| Disaggregation of Revenue [Line Items] | |||
| Revenue from Contracts with Customers | 97 | 61 | 73 |
| Other | Natural Gas | |||
| Disaggregation of Revenue [Line Items] | |||
| Revenue from Contracts with Customers | 178 | 148 | 137 |
| Other | All Other | |||
| Disaggregation of Revenue [Line Items] | |||
| Revenue from Contracts with Customers | 0 | 0 | 0 |
| Alternative revenue and other | |||
| Disaggregation of Revenue [Line Items] | |||
| Alternative revenue and other | 602 | 763 | 679 |
| Alternative revenue and other | Regulated Electric | |||
| Disaggregation of Revenue [Line Items] | |||
| Alternative revenue and other | 500 | 629 | 604 |
| Alternative revenue and other | Natural Gas | |||
| Disaggregation of Revenue [Line Items] | |||
| Alternative revenue and other | 90 | 122 | 62 |
| Alternative revenue and other | All Other | |||
| Disaggregation of Revenue [Line Items] | |||
| Alternative revenue and other | 12 | 12 | 13 |
| Total revenues | |||
| Disaggregation of Revenue [Line Items] | |||
| Total revenues | 15,310 | 13,431 | 11,526 |
| Total revenues | Regulated Electric | |||
| Disaggregation of Revenue [Line Items] | |||
| Total revenues | 12,123 | 11,205 | 9,802 |
| Total revenues | Natural Gas | |||
| Disaggregation of Revenue [Line Items] | |||
| Total revenues | 3,080 | 2,132 | 1,636 |
| Total revenues | All Other | |||
| Disaggregation of Revenue [Line Items] | |||
| Total revenues | $ 107 | $ 94 | $ 88 |
Income Taxes (Details) - USD ($) $ in Millions |
12 Months Ended | |
|---|---|---|
Dec. 31, 2022 |
Dec. 31, 2021 |
|
| Income Tax Disclosure [Abstract] | ||
| Tax Adjustments, Settlements, and Unusual Provisions | $ 13 | |
| Income Tax [Line Items] | ||
| Federal detriment | 23 | $ 24 |
| Tax Credit Carryforward [Line Items] | ||
| Federal detriment | 23 | 24 |
| Xcel Energy [Member] | ||
| Income Tax [Line Items] | ||
| Potential Tax Adjustments | 0 | |
| SPS | ||
| Income Tax [Line Items] | ||
| Potential Tax Adjustments | 0 | |
| State and Local Jurisdiction [Member] | ||
| Income Tax [Line Items] | ||
| Federal Benefit | 16 | 17 |
| Tax Credit Carryforward [Line Items] | ||
| Federal Benefit | $ 16 | $ 17 |
Income Taxes Federal Audit (Details) $ in Millions |
12 Months Ended |
|---|---|
|
Dec. 31, 2022
USD ($)
| |
| Income Tax [Line Items] | |
| Tax Adjustments, Settlements, and Unusual Provisions | $ 13 |
State Audits (Details) |
12 Months Ended |
|---|---|
|
Dec. 31, 2022
USD ($)
| |
| SPS | |
| Income Tax [Line Items] | |
| Potential Tax Adjustments | $ 0 |
| WISCONSIN | |
| Income Tax [Line Items] | |
| Potential Tax Adjustments | 0 |
| Xcel Energy [Member] | |
| Income Tax [Line Items] | |
| Potential Tax Adjustments | $ 0 |
Income Taxes Unrecognized Tax Benefit (Details) - USD ($) $ in Millions |
12 Months Ended | |||||
|---|---|---|---|---|---|---|
Dec. 31, 2022 |
Dec. 31, 2021 |
Dec. 31, 2020 |
Jan. 01, 2021 |
Jan. 01, 2020 |
Jan. 01, 2019 |
|
| Income Tax [Line Items] | ||||||
| Unrecognized tax benefit — Permanent tax positions | $ 55 | $ 47 | ||||
| Unrecognized tax benefit — Temporary tax positions | 12 | 11 | ||||
| Total unrecognized tax benefit | 67 | 58 | $ 52 | $ 58 | $ 52 | $ 44 |
| Additions based on tax positions related to the current year | 7 | 5 | 9 | |||
| Reductions based on tax positions related to the current year | 0 | 0 | 2 | |||
| Additions for tax positions of prior years | 6 | 2 | 35 | |||
| Reductions for tax positions of prior years | 1 | 1 | 34 | |||
| Unrecognized Tax Benefits, Decrease Resulting from Settlements with Taxing Authorities | (1) | 0 | 0 | |||
| Unrecognized Tax Benefits, Reduction Resulting from Lapse of Applicable Statute of Limitations | (2) | 0 | 0 | |||
| NOL and tax credit carryforwards | 40 | 36 | ||||
| Upper bound of decrease in unrecognized tax benefit that is reasonably possible | 40 | |||||
| Payable for interest related to unrecognized tax benefits at Jan. 1 | (4) | (3) | (3) | $ (3) | $ (3) | $ 0 |
| Interest expense related to unrecognized tax benefits | (1) | 0 | (3) | |||
| Unrecognized Tax Benefits, Income Tax Penalties Expense | $ 0 | $ 0 | $ 0 | |||
Income Taxes Other Income Tax Matters (Details) - USD ($) $ in Millions |
3 Months Ended | 12 Months Ended | ||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Dec. 31, 2022 |
Dec. 31, 2022 |
Dec. 31, 2021 |
Dec. 31, 2020 |
|||||||||||||||
| Income Tax [Line Items] | ||||||||||||||||||
| Federal NOL carryforward | $ 20 | $ 20 | $ 765 | |||||||||||||||
| Federal tax credit carryforwards | 1,593 | 1,593 | 1,172 | |||||||||||||||
| State NOL carryforwards | 1,022 | 1,022 | 1,648 | |||||||||||||||
| Valuation allowances for state NOL carryforwards | (3) | (3) | (3) | |||||||||||||||
| state tax credit carryforward, net of federal detirment | [1] | 85 | 85 | 89 | ||||||||||||||
| valuation allowances for state credit carryforwards, net of federal benefit | [2] | (62) | (62) | (64) | ||||||||||||||
| Federal detriment | $ 23 | $ 23 | $ 24 | |||||||||||||||
| Federal statutory rate | 21.00% | 21.00% | [3] | 21.00% | [3] | |||||||||||||
| State income tax on pretax income, net of federal tax effect | 4.90% | 5.00% | [3] | 4.90% | [3] | |||||||||||||
| Effective Income Tax Rate Reconciliation, Tax Credit, Percent | [4] | (27.40%) | (23.40%) | [3] | (15.70%) | [3] | ||||||||||||
| Effective Income Tax Rate Reconciliation, Other Regulatory Items, Percent | [5] | (5.50%) | (6.20%) | [3] | (7.60%) | [3] | ||||||||||||
| Other tax credits, net NOL & tax credit allowances | (1.30%) | (1.10%) | [3] | (1.20%) | [3] | |||||||||||||
| NOL Carryback | 0.00% | 0.00% | [3] | (0.90%) | [3] | |||||||||||||
| Other, net | (0.10%) | 0.10% | [3] | (0.90%) | [3] | |||||||||||||
| Effective income tax rate | (8.40%) | (4.60%) | [3] | (0.40%) | [3] | |||||||||||||
| Total income tax benefit | $ (135) | $ (70) | $ (6) | |||||||||||||||
| Deferred tax (benefit) expense excluding items below | (138) | 148 | 237 | |||||||||||||||
| Amortization and adjustments to deferred income taxes on income tax regulatory assets and liabilities | 8 | (221) | (247) | |||||||||||||||
| Income Tax Expense (Benefit), Intraperiod Tax Allocation | (10) | (6) | 2 | |||||||||||||||
| Deferred tax benefit | $ (140) | (140) | (8) | |||||||||||||||
| Deferred fuel costs | 222 | 222 | 262 | [6] | ||||||||||||||
| Regulatory liabilities | 1,255 | 1,255 | ||||||||||||||||
| Total deferred tax assets | 79 | |||||||||||||||||
| State and Local Jurisdiction [Member] | ||||||||||||||||||
| Income Tax [Line Items] | ||||||||||||||||||
| Federal Benefit | 16 | 16 | 17 | |||||||||||||||
| income tax expense | ||||||||||||||||||
| Income Tax [Line Items] | ||||||||||||||||||
| Current federal tax expense (benefit) | 1 | 15 | (13) | |||||||||||||||
| Current state tax expense (benefit) | 3 | (2) | 2 | |||||||||||||||
| Current change in unrecognized tax expense | 5 | 1 | 18 | |||||||||||||||
| Deferred federal tax benefit | (239) | (183) | (89) | |||||||||||||||
| Deferred state tax expense | 96 | 99 | 91 | |||||||||||||||
| Deferred change in unrecognized tax expense (benefit) | 3 | 5 | (10) | |||||||||||||||
| Deferred ITCs | (4) | (5) | (5) | |||||||||||||||
| Total income tax benefit | (135) | (70) | $ (6) | |||||||||||||||
| Net Deferred Tax Liablility [Member] | ||||||||||||||||||
| Income Tax [Line Items] | ||||||||||||||||||
| Federal tax credit carryforwards | 325 | 325 | 351 | [6] | ||||||||||||||
| Deferred ITCs | 14 | 15 | [6] | |||||||||||||||
| Differences between book and tax bases of property | 6,442 | 6,231 | [6] | |||||||||||||||
| Regulatory assets | 508 | 508 | 560 | [6] | ||||||||||||||
| Operating lease assets | 325 | 325 | 351 | [6] | ||||||||||||||
| Pension expense | 159 | 159 | 175 | [6] | ||||||||||||||
| Other | 92 | 92 | 88 | [6] | ||||||||||||||
| Total deferred tax liabilities | 7,748 | 7,748 | 7,667 | [6] | ||||||||||||||
| Tax credit carryforward | 1,679 | 1,679 | 1,261 | [6] | ||||||||||||||
| Regulatory liabilities | 742 | 742 | 742 | [6] | ||||||||||||||
| Other employee benefits | 102 | 102 | 119 | [6] | ||||||||||||||
| NOL carryforward | (57) | (57) | (247) | [6] | ||||||||||||||
| NOL and tax credit valuation allowances | (62) | (62) | (64) | [6] | ||||||||||||||
| Other | 135 | 135 | 102 | [6] | ||||||||||||||
| Total deferred tax assets | 2,992 | 2,992 | 2,773 | [6] | ||||||||||||||
| Net deferred tax liability | $ 4,756 | $ 4,756 | $ 4,894 | [6] | ||||||||||||||
| ||||||||||||||||||
Incentive Plans Including Share-Based Compensation (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Millions |
12 Months Ended | ||
|---|---|---|---|
Dec. 31, 2022 |
Dec. 31, 2021 |
Dec. 31, 2020 |
|
| Equity Instruments Other than Options Activity [Roll Forward] | |||
| Balance at January 1 (in shares) | 695 | ||
| Granted (in shares) | 395 | 421 | 411 |
| Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Forfeited in Period (in shares) | (96) | ||
| Vested (in shares) | (319) | (392) | (442) |
| Dividend equivalents (in shares) | 33 | ||
| Balance at December 31 (in shares) | 708 | 695 | |
| Equity Instruments Other than Options, Weighted Average Grant Date Fair Value [Abstract] | |||
| Balance at January 1, weighted average grant date fair value (in dollars per share) | $ 64.59 | ||
| Granted, weighted average grant date fair value (in dollars per share) | 68.43 | $ 66.03 | $ 62.92 |
| Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Forfeitures, Weighted Average Grant Date Fair Value (in dollars per share) | $ 65.53 | ||
| Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period, Fair Value | $ 22 | $ 27 | $ 29 |
| Vested, weighted average grant date fair value (in dollars per share) | $ 63.03 | ||
| Dividend equivalents, weighted average grant date fair value (in dollars per share) | 65.40 | ||
| Balance at December 31, weighted average grant date fair value (in dollars per share) | $ 67.35 | $ 64.59 | |
| Service-based awards [Member] | |||
| Equity Instruments Other than Options Activity [Roll Forward] | |||
| Granted (in shares) | 200 | ||
Share-Based Compensation Restricted Stock (Details) - shares shares in Thousands |
12 Months Ended | ||
|---|---|---|---|
Dec. 31, 2022 |
Dec. 31, 2021 |
Dec. 31, 2020 |
|
| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] | |||
| Granted (in shares) | 395 | 421 | 411 |
Other Equity Awards (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Millions |
12 Months Ended | ||
|---|---|---|---|
Dec. 31, 2022 |
Dec. 31, 2021 |
Dec. 31, 2020 |
|
| Equity Instruments Other than Options Activity [Roll Forward] | |||
| Balance at January 1 (in shares) | 695 | ||
| Granted (in shares) | 395 | 421 | 411 |
| Forfeited (in shares) | (96) | ||
| Vested (in shares) | (319) | (392) | (442) |
| Dividend equivalents (in shares) | 33 | ||
| Balance at December 31 (in shares) | 708 | 695 | |
| Equity Instruments Other than Options, Weighted Average Grant Date Fair Value [Abstract] | |||
| Balance at January 1, weighted average grant date fair value (in dollars per share) | $ 64.59 | ||
| Granted, weighted average grant date fair value (in dollars per share) | 68.43 | $ 66.03 | $ 62.92 |
| Forfeited, weighted average grant date fair value (in dollars per share) | 65.53 | ||
| Vested, weighted average grant date fair value (in dollars per share) | 63.03 | ||
| Dividend equivalents, weighted average grant date fair value (in dollars per share) | 65.40 | ||
| Balance at December 31, weighted average grant date fair value (in dollars per share) | $ 67.35 | $ 64.59 | |
| Equity Instruments Other than Options, Additional Disclosures [Abstract] | |||
| Total fair value of equity awards vested during the period | $ 22 | $ 27 | $ 29 |
| Performance-based awards [Member] | |||
| Equity Instruments Other than Options, Additional Disclosures [Abstract] | |||
| Award Vesting Period (in years) | 3 years | ||
| Service-based awards [Member] | |||
| Equity Instruments Other than Options Activity [Roll Forward] | |||
| Granted (in shares) | 200 | ||
| Xcel Energy Inc. 2015 Omnibus Incentive Plan [Member] | Service-based awards [Member] | |||
| Equity Instruments Other than Options Activity [Roll Forward] | |||
| Granted (in shares) | 7,000 | ||
| Equity Award Granted Between 2015 and 2018 | Performance-based awards [Member] | Minimum | |||
| Equity Instruments Other than Options, Additional Disclosures [Abstract] | |||
| Percentage payout for performance-based equity awards | 0.00% | ||
| Equity Award Granted Between 2015 and 2018 | Performance-based awards [Member] | Maximum | |||
| Equity Instruments Other than Options, Additional Disclosures [Abstract] | |||
| Percentage payout for performance-based equity awards | 200.00% | ||
Stock Equivalent Units (Details) - $ / shares |
12 Months Ended | ||
|---|---|---|---|
Dec. 31, 2022 |
Dec. 31, 2021 |
Dec. 31, 2020 |
|
| Equity Instruments Other than Options Activity [Roll Forward] | |||
| Balance at January 1 (in shares) | 695,000 | ||
| Granted (in shares) | 395,000 | 421,000 | 411,000 |
| Dividend equivalents (in shares) | 33,000 | ||
| Balance at December 31 (in shares) | 708,000 | 695,000 | |
| Equity Instruments Other than Options, Weighted Average Grant Date Fair Value [Abstract] | |||
| Balance at January 1, weighted average grant date fair value (in dollars per share) | $ 64.59 | ||
| Granted, weighted average grant date fair value (in dollars per share) | 68.43 | $ 66.03 | $ 62.92 |
| Dividend equivalents, weighted average grant date fair value (in dollars per share) | 65.40 | ||
| Balance at December 31, weighted average grant date fair value (in dollars per share) | $ 67.35 | $ 64.59 | |
| Stock Equivalent Units [Member] | |||
| Equity Instruments Other than Options Activity [Roll Forward] | |||
| Balance at January 1 (in shares) | 604,000 | ||
| Granted (in shares) | 29,000 | 31,000 | 33,000 |
| Units distributed (in shares) | 52,000 | ||
| Dividend equivalents (in shares) | 16,000 | ||
| Balance at December 31 (in shares) | 597,000 | 604,000 | |
| Equity Instruments Other than Options, Weighted Average Grant Date Fair Value [Abstract] | |||
| Balance at January 1, weighted average grant date fair value (in dollars per share) | $ 39.27 | ||
| Granted, weighted average grant date fair value (in dollars per share) | 71.97 | $ 68.15 | $ 61.61 |
| Units distributed, weighted average grant date fair value (in dollars per share) | 38.16 | ||
| Dividend equivalents, weighted average grant date fair value (in dollars per share) | 67.79 | ||
| Balance at December 31, weighted average grant date fair value (in dollars per share) | $ 41.75 | $ 39.27 | |
| Equity Instruments Other than Options, Additional Disclosures [Abstract] | |||
| Number of shares of common stock into which the share-based compensation can be converted (in shares) | 1 | ||
TSR Liability Awards (Details) - USD ($) shares in Thousands, $ in Millions |
12 Months Ended | ||
|---|---|---|---|
Dec. 31, 2022 |
Dec. 31, 2021 |
Dec. 31, 2020 |
|
| Equity Instruments Other than Options Activity [Roll Forward] | |||
| Granted (in shares) | 395 | 421 | 411 |
| TSR Liability Awards | |||
| Equity Instruments Other than Options Activity [Roll Forward] | |||
| Granted (in shares) | 165 | 221 | 212 |
| Equity Instruments Other than Options, Additional Disclosures [Abstract] | |||
| Award Vesting Period (in years) | 3 years | ||
| Awards settled (in shares) | 411 | 446 | 476 |
| Settlement amount (cash and common stock) | $ 27 | $ 27 | $ 33 |
| Amount of cash used to settle TSR liability awards | $ 21 | ||
| TSR Liability Awards | Minimum | |||
| Equity Instruments Other than Options, Additional Disclosures [Abstract] | |||
| Percentage payout for TSR liability awards | 0.00% | ||
| TSR Liability Awards | Maximum | |||
| Equity Instruments Other than Options, Additional Disclosures [Abstract] | |||
| Percentage payout for TSR liability awards | 200.00% | ||
Share-Based Compensation Expense (Details) - USD ($) shares in Thousands, $ in Millions |
12 Months Ended | ||||
|---|---|---|---|---|---|
Dec. 31, 2022 |
Dec. 31, 2021 |
Dec. 31, 2020 |
|||
| Share-Based Compensation Expense [Abstract] | |||||
| Granted (in shares) | 395 | 421 | 411 | ||
| Compensation cost for share-based awards | [1] | $ 36 | $ 31 | $ 73 | |
| Tax benefit recognized in income | 9 | 8 | $ 19 | ||
| Unrecognized compensation cost related to nonvested share-based compensation awards | $ 37 | $ 28 | |||
| Weighted-average period for recognition of unrecognized compensation cost related to nonvested share-based compensation awards (in years) | 1 year 9 months 18 days | ||||
| Service-based awards [Member] | |||||
| Share-Based Compensation Expense [Abstract] | |||||
| Granted (in shares) | 200 | ||||
| |||||
Share-Based Compensation Share-Based Compensation Phantom (Details) - $ / shares shares in Thousands |
12 Months Ended | ||
|---|---|---|---|
Dec. 31, 2022 |
Dec. 31, 2021 |
Dec. 31, 2020 |
|
| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] | |||
| Granted (in shares) | 395 | 421 | 411 |
| Granted, weighted average grant date fair value (in dollars per share) | $ 68.43 | $ 66.03 | $ 62.92 |
| Service-based awards [Member] | |||
| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] | |||
| Granted (in shares) | 200 | ||
Common Stock Equivalent (Details) - shares shares in Thousands |
12 Months Ended | ||||
|---|---|---|---|---|---|
Dec. 31, 2022 |
Dec. 31, 2021 |
Dec. 31, 2020 |
|||
| Earnings Per Share [Abstract] | |||||
| Weighted Average Number of Shares Outstanding, Basic | 547,000 | 539,000 | 527,000 | ||
| Diluted | [1] | 547,000 | 540,000 | 528,000 | |
| Dilutive Effect of Contingently Issuable Shares | 300 | 300 | 1,100 | ||
| |||||
Nuclear Decommissioning Fund (Details) - USD ($) $ in Millions |
Dec. 31, 2022 |
Dec. 31, 2021 |
||||||
|---|---|---|---|---|---|---|---|---|
| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | ||||||||
| Equity investments in unconsolidated subsidiaries | $ 219 | $ 208 | ||||||
| Miscellaneous investments | 133 | 164 | ||||||
| Final Contractual Maturity [Abstract] | ||||||||
| Due in 1 Year or Less | (6) | |||||||
| Due in 1 to 5 Years | 204 | |||||||
| Due in 5 to 10 Years | 250 | |||||||
| Due after 10 Years | 215 | |||||||
| Total | 675 | |||||||
| Fair Value Measured on a Recurring Basis | Cost | ||||||||
| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | ||||||||
| Decommissioning fund investments | 1,976 | [1] | 1,962 | [2] | ||||
| Fair Value Measured on a Recurring Basis | Cost | Cash equivalents | ||||||||
| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | ||||||||
| Cash Equivalents | 29 | [1] | 64 | [2] | ||||
| Fair Value Measured on a Recurring Basis | Cost | Commingled Funds | ||||||||
| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | ||||||||
| Investments, Fair Value Disclosure | 803 | [1] | 856 | [2] | ||||
| Fair Value Measured on a Recurring Basis | Cost | Debt Securities | ||||||||
| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | ||||||||
| Debt Securities, Available-for-Sale, Excluding Accrued Interest | 738 | [1] | 631 | [2] | ||||
| Fair Value Measured on a Recurring Basis | Cost | Equity Securities | ||||||||
| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | ||||||||
| Equity Securities, FV-NI, Current | 406 | [1] | 411 | [2] | ||||
| Fair Value Measured on a Recurring Basis | Fair Value | ||||||||
| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | ||||||||
| Alternative Investment | 1,178 | [1] | 1,294 | [2] | ||||
| Decommissioning fund investments | 2,882 | 3,256 | ||||||
| Fair Value Measured on a Recurring Basis | Fair Value | Cash equivalents | ||||||||
| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | ||||||||
| Cash Equivalents | 29 | [1] | 64 | [2] | ||||
| Alternative Investment | 0 | [1] | 0 | [2] | ||||
| Fair Value Measured on a Recurring Basis | Fair Value | Commingled Funds | ||||||||
| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | ||||||||
| Alternative Investment | 1,178 | [1] | 1,294 | [2] | ||||
| Investments, Fair Value Disclosure | 1,178 | [1] | 1,294 | [2] | ||||
| Fair Value Measured on a Recurring Basis | Fair Value | Debt Securities | ||||||||
| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | ||||||||
| Alternative Investment | 0 | [1] | 0 | [2] | ||||
| Debt Securities, Available-for-Sale, Excluding Accrued Interest | 675 | [1] | 675 | [2] | ||||
| Fair Value Measured on a Recurring Basis | Fair Value | Equity Securities | ||||||||
| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | ||||||||
| Alternative Investment | 0 | [1] | 0 | [2] | ||||
| Equity Securities, FV-NI, Current | 1,000 | [1] | 1,223 | [2] | ||||
| Fair Value Measured on a Recurring Basis | Fair Value | Level 1 | ||||||||
| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | ||||||||
| Decommissioning fund investments | 1,028 | [1] | 1,286 | [2] | ||||
| Fair Value Measured on a Recurring Basis | Fair Value | Level 1 | Cash equivalents | ||||||||
| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | ||||||||
| Cash Equivalents | 29 | [1] | 64 | [2] | ||||
| Fair Value Measured on a Recurring Basis | Fair Value | Level 1 | Commingled Funds | ||||||||
| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | ||||||||
| Investments, Fair Value Disclosure | 0 | [1] | 0 | [2] | ||||
| Fair Value Measured on a Recurring Basis | Fair Value | Level 1 | Debt Securities | ||||||||
| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | ||||||||
| Debt Securities, Available-for-Sale, Excluding Accrued Interest | 0 | [1] | 0 | [2] | ||||
| Fair Value Measured on a Recurring Basis | Fair Value | Level 1 | Equity Securities | ||||||||
| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | ||||||||
| Equity Securities, FV-NI, Current | 999 | [1] | 1,222 | [2] | ||||
| Fair Value Measured on a Recurring Basis | Fair Value | Level 2 | ||||||||
| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | ||||||||
| Decommissioning fund investments | 670 | [1] | 667 | [2] | ||||
| Fair Value Measured on a Recurring Basis | Fair Value | Level 2 | Cash equivalents | ||||||||
| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | ||||||||
| Cash Equivalents | 0 | [1] | 0 | [2] | ||||
| Fair Value Measured on a Recurring Basis | Fair Value | Level 2 | Commingled Funds | ||||||||
| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | ||||||||
| Investments, Fair Value Disclosure | 0 | [1] | 0 | [2] | ||||
| Fair Value Measured on a Recurring Basis | Fair Value | Level 2 | Debt Securities | ||||||||
| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | ||||||||
| Debt Securities, Available-for-Sale, Excluding Accrued Interest | 669 | [1] | 666 | [2] | ||||
| Fair Value Measured on a Recurring Basis | Fair Value | Level 2 | Equity Securities | ||||||||
| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | ||||||||
| Equity Securities, FV-NI, Current | 1 | [1] | 1 | [2] | ||||
| Fair Value Measured on a Recurring Basis | Fair Value | Level 3 | ||||||||
| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | ||||||||
| Decommissioning fund investments | 6 | [1] | 9 | [2] | ||||
| Fair Value Measured on a Recurring Basis | Fair Value | Level 3 | Cash equivalents | ||||||||
| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | ||||||||
| Cash Equivalents | 0 | [1] | 0 | [2] | ||||
| Fair Value Measured on a Recurring Basis | Fair Value | Level 3 | Commingled Funds | ||||||||
| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | ||||||||
| Investments, Fair Value Disclosure | 0 | [1] | 0 | [2] | ||||
| Fair Value Measured on a Recurring Basis | Fair Value | Level 3 | Debt Securities | ||||||||
| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | ||||||||
| Debt Securities, Available-for-Sale, Excluding Accrued Interest | 6 | [1] | 9 | [2] | ||||
| Fair Value Measured on a Recurring Basis | Fair Value | Level 3 | Equity Securities | ||||||||
| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | ||||||||
| Equity Securities, FV-NI, Current | $ 0 | [1] | $ 0 | [2] | ||||
| ||||||||
Rabbi Trusts (Details) - USD ($) $ in Millions |
12 Months Ended | |||||||
|---|---|---|---|---|---|---|---|---|
Dec. 31, 2022 |
Dec. 31, 2021 |
|||||||
| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | ||||||||
| Debt Securities, Available-for-Sale, Unrealized Gain | $ 1,000 | $ 1,300 | ||||||
| Debt Securities, Available-for-Sale, Unrealized Loss | 90 | 7 | ||||||
| Fair Value Measured on a Recurring Basis | Cost | Cash equivalents | ||||||||
| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | ||||||||
| Cash Equivalents | 29 | [1] | 64 | [2] | ||||
| Fair Value Measured on a Recurring Basis | Fair Value | Cash equivalents | ||||||||
| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | ||||||||
| Cash Equivalents | 29 | [1] | 64 | [2] | ||||
| Fair Value Measured on a Recurring Basis | Fair Value | Level 1 | Cash equivalents | ||||||||
| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | ||||||||
| Cash Equivalents | 29 | [1] | 64 | [2] | ||||
| Fair Value Measured on a Recurring Basis | Fair Value | Level 2 | Cash equivalents | ||||||||
| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | ||||||||
| Cash Equivalents | 0 | [1] | 0 | [2] | ||||
| Fair Value Measured on a Recurring Basis | Fair Value | Level 3 | Cash equivalents | ||||||||
| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | ||||||||
| Cash Equivalents | 0 | [1] | 0 | [2] | ||||
| Rabbi Trust [Member] | Fair Value Measured on a Recurring Basis | Fair Value | ||||||||
| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | ||||||||
| Total | $ 80 | $ 109 | ||||||
| ||||||||
Interest Rate Derivatives (Details) - Interest Rate Swap $ in Millions |
Dec. 31, 2022
USD ($)
|
|---|---|
| Interest Rate Derivatives [Abstract] | |
| Interest rate cash low hedge gain (loss) to be reclassified during the next 12 months | $ 2 |
| Derivative Liability, Notional Amount | $ 40 |
Commodity Derivatives (Details) MWh in Millions, MMBTU in Millions, $ in Millions |
Dec. 31, 2022
USD ($)
MWh
MMBTU
|
Dec. 31, 2021
USD ($)
MMBTU
MWh
|
||||
|---|---|---|---|---|---|---|
| Derivative [Line Items] | ||||||
| Reclaim Cash Collateral | $ 53 | $ 30 | ||||
| Cash Flow Hedges | ||||||
| Derivative [Line Items] | ||||||
| Commodity contracts designated as cash flow hedges | $ 0 | |||||
| Electric Commodity | ||||||
| Derivative [Line Items] | ||||||
| Notional Amount | MWh | [1],[2] | 61 | 80 | |||
| Natural Gas Commodity | ||||||
| Derivative [Line Items] | ||||||
| Notional Amount | MMBTU | [1],[2] | 131 | 156 | |||
| ||||||
Consideration of Credit Risk and Concentrations (Details) - Credit Concentration Risk $ in Millions |
Dec. 31, 2022
USD ($)
Counterparty
|
|---|---|
| Derivative [Line Items] | |
| Number of most significant counterparties | 10 |
| Municipal or Cooperative Entities or Other Utilities | |
| Derivative [Line Items] | |
| Number of most significant counterparties | 6 |
| External Credit Rating, Investment Grade | |
| Derivative [Line Items] | |
| Number of most significant counterparties | 4 |
| Credit exposure for the most significant counterparties | $ | $ 75 |
| Percentage of credit exposure for the most significant counterparties | 37.00% |
| Internal Investment Grade | |
| Derivative [Line Items] | |
| Number of most significant counterparties | 4 |
| Credit exposure for the most significant counterparties | $ | $ 63 |
| Percentage of credit exposure for the most significant counterparties | 32.00% |
| External Credit Rating, Non Investment Grade [Member] | |
| Derivative [Line Items] | |
| Number of most significant counterparties | 2 |
| Credit exposure for the most significant counterparties | $ | $ 62 |
| Percentage of credit exposure for the most significant counterparties | 31.00% |
Qualifying Cash Flow Hedges (Details) - USD ($) |
12 Months Ended | ||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Dec. 31, 2022 |
Dec. 31, 2021 |
Dec. 31, 2020 |
|||||||||||
| Financial Impact of Qualifying Cash Flow Hedges on Accumulated Other Comprehensive Income (Loss) [Roll Forward] | |||||||||||||
| Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI on Derivatives, Net of Tax | $ (5,000,000) | $ (6,000,000) | $ (5,000,000) | ||||||||||
| Impact of Derivative Activity | |||||||||||||
| Fair Value Hedges, Net | 0 | 0 | 0 | ||||||||||
| Not Designated as Hedging Instrument | |||||||||||||
| Impact of Derivative Activity | |||||||||||||
| Other Comprehensive Income (Loss), Unrealized Gain (Loss) on Derivatives Arising During Period, before Tax | 0 | 0 | 0 | ||||||||||
| Derivative Instruments Gain (Loss) Reclassified To Regulatory Assets And Liabilities Net | (26,000,000) | 28,000,000 | (18,000,000) | ||||||||||
| Derivative Instruments, Gain (Loss) Reclassified from Accumulated OCI into Income, Effective Portion, Net | 0 | 0 | 0 | ||||||||||
| Pre-tax gains (losses) reclassified into income during the period from regulatory assets and (liabilities) | 13,000,000 | 18,000,000 | (7,000,000) | ||||||||||
| Derivative, Gain (Loss) on Derivative, Net | (2,000,000) | 41,000,000 | (14,000,000) | ||||||||||
| Not Designated as Hedging Instrument | Commodity Trading Contract | |||||||||||||
| Impact of Derivative Activity | |||||||||||||
| Derivative Instruments, Gain (Loss) Reclassified from Accumulated OCI into Income, Effective Portion, Net | 0 | 0 | 0 | ||||||||||
| Pre-tax gains (losses) reclassified into income during the period from regulatory assets and (liabilities) | 0 | 0 | 0 | ||||||||||
| Derivative, Gain (Loss) on Derivative, Net | [1] | 25,000,000 | 63,000,000 | (1,000,000) | |||||||||
| Not Designated as Hedging Instrument | Electric Commodity Contract | |||||||||||||
| Impact of Derivative Activity | |||||||||||||
| Other Comprehensive Income (Loss), Unrealized Gain (Loss) on Derivatives Arising During Period, before Tax | 0 | 0 | 0 | ||||||||||
| Derivative Instruments Gain (Loss) Reclassified To Regulatory Assets And Liabilities Net | (10,000,000) | 32,000,000 | (5,000,000) | ||||||||||
| Derivative Instruments, Gain (Loss) Reclassified from Accumulated OCI into Income, Effective Portion, Net | 0 | 0 | 0 | ||||||||||
| Pre-tax gains (losses) reclassified into income during the period from regulatory assets and (liabilities) | [2] | (3,000,000) | 23,000,000 | 3,000,000 | |||||||||
| Derivative, Gain (Loss) on Derivative, Net | 0 | 0 | 0 | ||||||||||
| Not Designated as Hedging Instrument | Natural Gas Commodity Contract | |||||||||||||
| Impact of Derivative Activity | |||||||||||||
| Other Comprehensive Income (Loss), Unrealized Gain (Loss) on Derivatives Arising During Period, before Tax | 0 | 0 | 0 | ||||||||||
| Derivative Instruments Gain (Loss) Reclassified To Regulatory Assets And Liabilities Net | (16,000,000) | (4,000,000) | (13,000,000) | ||||||||||
| Derivative Instruments, Gain (Loss) Reclassified from Accumulated OCI into Income, Effective Portion, Net | 0 | 0 | 0 | ||||||||||
| Pre-tax gains (losses) reclassified into income during the period from regulatory assets and (liabilities) | [3] | 10,000,000 | 5,000,000 | (10,000,000) | |||||||||
| Derivative, Gain (Loss) on Derivative, Net | [3],[4] | (27,000,000) | (22,000,000) | (13,000,000) | |||||||||
| Cash Flow Hedges | Designated as Hedging Instrument | |||||||||||||
| Impact of Derivative Activity | |||||||||||||
| Other Comprehensive Income (Loss), Unrealized Gain (Loss) on Derivatives Arising During Period, before Tax | 22,000,000 | 5,000,000 | (13,000,000) | ||||||||||
| Derivative Instruments Gain (Loss) Reclassified To Regulatory Assets And Liabilities Net | 0 | 0 | 0 | ||||||||||
| Derivative Instruments, Gain (Loss) Reclassified from Accumulated OCI into Income, Effective Portion, Net | (7,000,000) | (8,000,000) | (7,000,000) | ||||||||||
| Pre-tax gains (losses) reclassified into income during the period from regulatory assets and (liabilities) | 0 | 0 | 0 | ||||||||||
| Derivative, Gain (Loss) on Derivative, Net | 0 | 0 | 0 | ||||||||||
| Cash Flow Hedges | Designated as Hedging Instrument | Interest Rate Contract | |||||||||||||
| Impact of Derivative Activity | |||||||||||||
| Other Comprehensive Income (Loss), Unrealized Gain (Loss) on Derivatives Arising During Period, before Tax | 22,000,000 | 5,000,000 | (13,000,000) | ||||||||||
| Derivative Instruments Gain (Loss) Reclassified To Regulatory Assets And Liabilities Net | 0 | 0 | 0 | ||||||||||
| Derivative Instruments, Gain (Loss) Reclassified from Accumulated OCI into Income, Effective Portion, Net | [5] | (7,000,000) | (8,000,000) | (7,000,000) | |||||||||
| Pre-tax gains (losses) reclassified into income during the period from regulatory assets and (liabilities) | 0 | 0 | 0 | ||||||||||
| Derivative, Gain (Loss) on Derivative, Net | $ 0 | $ 0 | $ 0 | ||||||||||
| |||||||||||||
Credit Related Contingent Features (Details) - USD ($) $ in Millions |
Dec. 31, 2022 |
Dec. 31, 2021 |
|---|---|---|
| Fair Value Disclosures [Abstract] | ||
| Derivative instruments in a gross liability position | $ 4 | $ 3 |
| Derivative, Gross Liability with Cross Default Position, Aggregate Fair Value | 76 | 64 |
| Collateral posted related to adequate assurance clauses in derivative contracts | $ 0 | $ 0 |
Recurring Fair Value Measurements (Details) - USD ($) $ in Millions |
12 Months Ended | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
Dec. 31, 2022 |
Dec. 31, 2021 |
Dec. 31, 2020 |
|||||||||
| Derivatives, Fair Value [Line Items] | |||||||||||
| Derivative Asset, Net | $ 279 | $ 123 | |||||||||
| Derivative Asset, Noncurrent | 93 | 67 | |||||||||
| Derivative Liability, Net | 113 | 105 | |||||||||
| Return Cash Collateral | 0 | 0 | |||||||||
| Reclaim Cash Collateral | $ 53 | $ 30 | |||||||||
| Changes in Level 3 Commodity Derivatives | |||||||||||
| Derivative Liability, Statement of Financial Position [Extensible Enumeration] | Derivative instruments | Derivative instruments | |||||||||
| Derivative Liability, Noncurrent | $ 76 | $ 69 | |||||||||
| Commodity Contract | |||||||||||
| Changes in Level 3 Commodity Derivatives | |||||||||||
| Balance at Jan. 1 | 19 | (49) | $ 4 | ||||||||
| Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Inputs Reconciliation, Purchases | [1] | 406 | 65 | 51 | |||||||
| Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Inputs Reconciliation, Settlements | [1] | (350) | (158) | (73) | |||||||
| (Losses) gains recognized in earnings | [2] | 151 | 49 | (39) | |||||||
| Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Asset Liability Net Losses Gains Recognized As Regulatory Assets And Liabilities | [1] | 10 | 112 | 8 | |||||||
| Balance at Dec. 31 | $ 236 | $ 19 | $ (49) | ||||||||
| Other Noncurrent Assets | |||||||||||
| Derivatives, Fair Value [Line Items] | |||||||||||
| Derivative Asset, Current, Statement of Financial Position [Extensible Enumeration] | Derivative instruments | Derivative instruments | |||||||||
| Changes in Level 3 Commodity Derivatives | |||||||||||
| Derivative Asset, Noncurrent, Statement of Financial Position [Extensible Enumeration] | Derivative instruments | Derivative instruments | |||||||||
| Fair Value Measured on a Recurring Basis | |||||||||||
| Derivatives, Fair Value [Line Items] | |||||||||||
| Derivative Asset, Net | $ 276 | $ 120 | |||||||||
| Derivative Asset, Noncurrent | 90 | 61 | |||||||||
| Derivative Liability, Net | 83 | 65 | |||||||||
| Changes in Level 3 Commodity Derivatives | |||||||||||
| Derivative Liability, Noncurrent | 59 | 52 | |||||||||
| Fair Value Measured on a Recurring Basis | Other Derivative Instruments | Commodity Contract | |||||||||||
| Derivatives, Fair Value [Line Items] | |||||||||||
| Derivative Asset, Net | 82 | 46 | |||||||||
| Derivative Asset, Noncurrent | 90 | 61 | |||||||||
| Derivative Liability, Net | 83 | 65 | |||||||||
| Changes in Level 3 Commodity Derivatives | |||||||||||
| Derivative Liability, Noncurrent | 45 | 44 | |||||||||
| Fair Value Measured on a Recurring Basis | Other Derivative Instruments | Electric Commodity | |||||||||||
| Derivatives, Fair Value [Line Items] | |||||||||||
| Derivative Asset, Gross | 177 | 57 | |||||||||
| Netting | [3] | (2) | (1) | ||||||||
| Derivative Asset, Net | 175 | 56 | |||||||||
| Derivative Liability, Gross | 2 | 1 | |||||||||
| Netting | [3] | (2) | (1) | ||||||||
| Changes in Level 3 Commodity Derivatives | |||||||||||
| Derivative Liability, Noncurrent | 0 | 0 | |||||||||
| Fair Value Measured on a Recurring Basis | Other Derivative Instruments | Electric Commodity | Level 1 | |||||||||||
| Derivatives, Fair Value [Line Items] | |||||||||||
| Derivative Asset, Gross | 0 | 0 | |||||||||
| Derivative Liability, Gross | 0 | 0 | |||||||||
| Fair Value Measured on a Recurring Basis | Other Derivative Instruments | Electric Commodity | Level 2 | |||||||||||
| Derivatives, Fair Value [Line Items] | |||||||||||
| Derivative Asset, Gross | 0 | 0 | |||||||||
| Derivative Liability, Gross | 0 | 0 | |||||||||
| Fair Value Measured on a Recurring Basis | Other Derivative Instruments | Electric Commodity | Level 3 | |||||||||||
| Derivatives, Fair Value [Line Items] | |||||||||||
| Derivative Asset, Gross | 177 | 57 | |||||||||
| Derivative Liability, Gross | 2 | 1 | |||||||||
| Fair Value Measured on a Recurring Basis | Other Derivative Instruments | Natural Gas Commodity | |||||||||||
| Derivatives, Fair Value [Line Items] | |||||||||||
| Derivative Asset, Gross | 19 | 18 | |||||||||
| Netting | [3] | 0 | 0 | ||||||||
| Derivative Asset, Net | 19 | 18 | |||||||||
| Derivative Liability, Gross | 13 | 8 | |||||||||
| Netting | [3] | 0 | 0 | ||||||||
| Changes in Level 3 Commodity Derivatives | |||||||||||
| Derivative Liability, Noncurrent | 13 | 8 | |||||||||
| Fair Value Measured on a Recurring Basis | Other Derivative Instruments | Natural Gas Commodity | Level 1 | |||||||||||
| Derivatives, Fair Value [Line Items] | |||||||||||
| Derivative Asset, Gross | 0 | 0 | |||||||||
| Derivative Liability, Gross | 0 | 0 | |||||||||
| Fair Value Measured on a Recurring Basis | Other Derivative Instruments | Natural Gas Commodity | Level 2 | |||||||||||
| Derivatives, Fair Value [Line Items] | |||||||||||
| Derivative Asset, Gross | 19 | 18 | |||||||||
| Derivative Liability, Gross | 13 | 8 | |||||||||
| Fair Value Measured on a Recurring Basis | Other Derivative Instruments | Natural Gas Commodity | Level 3 | |||||||||||
| Derivatives, Fair Value [Line Items] | |||||||||||
| Derivative Asset, Gross | 0 | 0 | |||||||||
| Derivative Liability, Gross | 0 | 0 | |||||||||
| Fair Value Measured on a Recurring Basis | Designated as Hedging Instrument | Interest Rate Swap | Cash Flow Hedges | |||||||||||
| Changes in Level 3 Commodity Derivatives | |||||||||||
| Derivative Liability, Noncurrent | 1 | 0 | |||||||||
| Fair Value Measured on a Recurring Basis | Other Current Assets | |||||||||||
| Derivatives, Fair Value [Line Items] | |||||||||||
| Derivative Asset, Gross | 520 | 255 | |||||||||
| Netting | [3] | (244) | (135) | ||||||||
| Fair Value Measured on a Recurring Basis | Other Current Assets | Level 1 | |||||||||||
| Derivatives, Fair Value [Line Items] | |||||||||||
| Derivative Asset, Gross | 32 | 22 | |||||||||
| Fair Value Measured on a Recurring Basis | Other Current Assets | Level 2 | |||||||||||
| Derivatives, Fair Value [Line Items] | |||||||||||
| Derivative Asset, Gross | 278 | 155 | |||||||||
| Fair Value Measured on a Recurring Basis | Other Current Assets | Level 3 | |||||||||||
| Derivatives, Fair Value [Line Items] | |||||||||||
| Derivative Asset, Gross | 210 | 78 | |||||||||
| Fair Value Measured on a Recurring Basis | Other Current Assets | Other Derivative Instruments | Commodity Contract | |||||||||||
| Derivatives, Fair Value [Line Items] | |||||||||||
| Derivative Asset, Gross | 324 | 180 | |||||||||
| Netting | [3] | (242) | (134) | ||||||||
| Fair Value Measured on a Recurring Basis | Other Current Assets | Other Derivative Instruments | Commodity Contract | Level 1 | |||||||||||
| Derivatives, Fair Value [Line Items] | |||||||||||
| Derivative Asset, Gross | 32 | 22 | |||||||||
| Fair Value Measured on a Recurring Basis | Other Current Assets | Other Derivative Instruments | Commodity Contract | Level 2 | |||||||||||
| Derivatives, Fair Value [Line Items] | |||||||||||
| Derivative Asset, Gross | 259 | 137 | |||||||||
| Fair Value Measured on a Recurring Basis | Other Current Assets | Other Derivative Instruments | Commodity Contract | Level 3 | |||||||||||
| Derivatives, Fair Value [Line Items] | |||||||||||
| Derivative Asset, Gross | 33 | 21 | |||||||||
| Fair Value Measured on a Recurring Basis | Other Noncurrent Assets | |||||||||||
| Derivatives, Fair Value [Line Items] | |||||||||||
| Derivative Asset, Gross | 179 | 168 | |||||||||
| Netting | [3] | (89) | (107) | ||||||||
| Fair Value Measured on a Recurring Basis | Other Noncurrent Assets | Level 1 | |||||||||||
| Derivatives, Fair Value [Line Items] | |||||||||||
| Derivative Asset, Gross | 34 | 16 | |||||||||
| Fair Value Measured on a Recurring Basis | Other Noncurrent Assets | Level 2 | |||||||||||
| Derivatives, Fair Value [Line Items] | |||||||||||
| Derivative Asset, Gross | 71 | 63 | |||||||||
| Fair Value Measured on a Recurring Basis | Other Noncurrent Assets | Level 3 | |||||||||||
| Derivatives, Fair Value [Line Items] | |||||||||||
| Derivative Asset, Gross | 74 | 89 | |||||||||
| Fair Value Measured on a Recurring Basis | Other Noncurrent Assets | Other Derivative Instruments | Commodity Contract | |||||||||||
| Derivatives, Fair Value [Line Items] | |||||||||||
| Derivative Asset, Gross | 179 | 168 | |||||||||
| Netting | [3] | (89) | (107) | ||||||||
| Fair Value Measured on a Recurring Basis | Other Noncurrent Assets | Other Derivative Instruments | Commodity Contract | Level 1 | |||||||||||
| Derivatives, Fair Value [Line Items] | |||||||||||
| Derivative Asset, Gross | 34 | 16 | |||||||||
| Fair Value Measured on a Recurring Basis | Other Noncurrent Assets | Other Derivative Instruments | Commodity Contract | Level 2 | |||||||||||
| Derivatives, Fair Value [Line Items] | |||||||||||
| Derivative Asset, Gross | 71 | 63 | |||||||||
| Fair Value Measured on a Recurring Basis | Other Noncurrent Assets | Other Derivative Instruments | Commodity Contract | Level 3 | |||||||||||
| Derivatives, Fair Value [Line Items] | |||||||||||
| Derivative Asset, Gross | 74 | 89 | |||||||||
| Fair Value Measured on a Recurring Basis | Other Current Liabilities | |||||||||||
| Derivatives, Fair Value [Line Items] | |||||||||||
| Derivative Liability, Gross | 348 | 196 | |||||||||
| Netting | [3] | (289) | (144) | ||||||||
| Fair Value Measured on a Recurring Basis | Other Current Liabilities | Level 1 | |||||||||||
| Derivatives, Fair Value [Line Items] | |||||||||||
| Derivative Liability, Gross | 29 | 19 | |||||||||
| Fair Value Measured on a Recurring Basis | Other Current Liabilities | Level 2 | |||||||||||
| Derivatives, Fair Value [Line Items] | |||||||||||
| Derivative Liability, Gross | 311 | 156 | |||||||||
| Fair Value Measured on a Recurring Basis | Other Current Liabilities | Level 3 | |||||||||||
| Derivatives, Fair Value [Line Items] | |||||||||||
| Derivative Liability, Gross | 8 | 21 | |||||||||
| Fair Value Measured on a Recurring Basis | Other Current Liabilities | Other Derivative Instruments | Commodity Contract | |||||||||||
| Derivatives, Fair Value [Line Items] | |||||||||||
| Derivative Liability, Gross | 332 | 187 | |||||||||
| Netting | [3] | (287) | (143) | ||||||||
| Fair Value Measured on a Recurring Basis | Other Current Liabilities | Other Derivative Instruments | Commodity Contract | Level 1 | |||||||||||
| Derivatives, Fair Value [Line Items] | |||||||||||
| Derivative Liability, Gross | 29 | 19 | |||||||||
| Fair Value Measured on a Recurring Basis | Other Current Liabilities | Other Derivative Instruments | Commodity Contract | Level 2 | |||||||||||
| Derivatives, Fair Value [Line Items] | |||||||||||
| Derivative Liability, Gross | 297 | 148 | |||||||||
| Fair Value Measured on a Recurring Basis | Other Current Liabilities | Other Derivative Instruments | Commodity Contract | Level 3 | |||||||||||
| Derivatives, Fair Value [Line Items] | |||||||||||
| Derivative Liability, Gross | 6 | 20 | |||||||||
| Fair Value Measured on a Recurring Basis | Other Current Liabilities | Designated as Hedging Instrument | Interest Rate Swap | |||||||||||
| Derivatives, Fair Value [Line Items] | |||||||||||
| Netting | [3] | 0 | 0 | ||||||||
| Fair Value Measured on a Recurring Basis | Other Current Liabilities | Designated as Hedging Instrument | Interest Rate Swap | Cash Flow Hedges | |||||||||||
| Derivatives, Fair Value [Line Items] | |||||||||||
| Derivative Liability, Gross | 1 | 0 | |||||||||
| Fair Value Measured on a Recurring Basis | Other Current Liabilities | Designated as Hedging Instrument | Interest Rate Swap | Level 1 | Cash Flow Hedges | |||||||||||
| Derivatives, Fair Value [Line Items] | |||||||||||
| Derivative Liability, Gross | 0 | 0 | |||||||||
| Fair Value Measured on a Recurring Basis | Other Current Liabilities | Designated as Hedging Instrument | Interest Rate Swap | Level 2 | Cash Flow Hedges | |||||||||||
| Derivatives, Fair Value [Line Items] | |||||||||||
| Derivative Liability, Gross | 1 | 0 | |||||||||
| Fair Value Measured on a Recurring Basis | Other Current Liabilities | Designated as Hedging Instrument | Interest Rate Swap | Level 3 | Cash Flow Hedges | |||||||||||
| Derivatives, Fair Value [Line Items] | |||||||||||
| Derivative Liability, Gross | 0 | 0 | |||||||||
| Fair Value Measured on a Recurring Basis | Other Noncurrent Liabilities | |||||||||||
| Derivatives, Fair Value [Line Items] | |||||||||||
| Derivative Liability, Gross | 181 | 193 | |||||||||
| Netting | [3] | (98) | (128) | ||||||||
| Fair Value Measured on a Recurring Basis | Other Noncurrent Liabilities | Level 1 | |||||||||||
| Derivatives, Fair Value [Line Items] | |||||||||||
| Derivative Liability, Gross | 43 | 18 | |||||||||
| Fair Value Measured on a Recurring Basis | Other Noncurrent Liabilities | Level 2 | |||||||||||
| Derivatives, Fair Value [Line Items] | |||||||||||
| Derivative Liability, Gross | 97 | 48 | |||||||||
| Fair Value Measured on a Recurring Basis | Other Noncurrent Liabilities | Level 3 | |||||||||||
| Derivatives, Fair Value [Line Items] | |||||||||||
| Derivative Liability, Gross | 41 | 127 | |||||||||
| Fair Value Measured on a Recurring Basis | Other Noncurrent Liabilities | Other Derivative Instruments | Commodity Contract | |||||||||||
| Derivatives, Fair Value [Line Items] | |||||||||||
| Derivative Liability, Gross | 181 | 193 | |||||||||
| Netting | [3] | (98) | (128) | ||||||||
| Fair Value Measured on a Recurring Basis | Other Noncurrent Liabilities | Other Derivative Instruments | Commodity Contract | Level 1 | |||||||||||
| Derivatives, Fair Value [Line Items] | |||||||||||
| Derivative Liability, Gross | 43 | 18 | |||||||||
| Fair Value Measured on a Recurring Basis | Other Noncurrent Liabilities | Other Derivative Instruments | Commodity Contract | Level 2 | |||||||||||
| Derivatives, Fair Value [Line Items] | |||||||||||
| Derivative Liability, Gross | 97 | 48 | |||||||||
| Fair Value Measured on a Recurring Basis | Other Noncurrent Liabilities | Other Derivative Instruments | Commodity Contract | Level 3 | |||||||||||
| Derivatives, Fair Value [Line Items] | |||||||||||
| Derivative Liability, Gross | 41 | 127 | |||||||||
| Fair Value, Measurements, Nonrecurring | Purchased Power Agreements | |||||||||||
| Derivatives, Fair Value [Line Items] | |||||||||||
| Derivative Asset, Net | [4] | 3 | 3 | ||||||||
| Derivative Asset, Noncurrent | [4] | 3 | 6 | ||||||||
| Derivative Liability, Net | [4] | 30 | 40 | ||||||||
| Changes in Level 3 Commodity Derivatives | |||||||||||
| Derivative Liability, Noncurrent | [4] | $ 17 | $ 17 | ||||||||
| |||||||||||
Fair Value of Long-Term Debt (Details) - USD ($) $ in Millions |
Dec. 31, 2022 |
Dec. 31, 2021 |
|---|---|---|
| Financial Liabilities, Balance Sheet Groupings [Abstract] | ||
| Long-term Debt, Carrying Amount | $ 23,964 | $ 22,380 |
| Long-term debt, Fair Value | $ 20,897 | $ 25,232 |
Pension and Postretirement Health Care Benefits (Details) - USD ($) |
12 Months Ended | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|
Dec. 31, 2023 |
Dec. 31, 2022 |
Dec. 31, 2021 |
Dec. 31, 2020 |
|||||||
| Pension Benefits [Abstract] | ||||||||||
| annual interest crediting rates | $ 4.89 | $ 2.03 | $ 1.89 | |||||||
| Supplemental Executive Retirement Plan (SERP) and Nonqualified Pension Plan | ||||||||||
| Pension Benefits [Abstract] | ||||||||||
| Total benefit obligation | 11,000,000 | 43,000,000 | ||||||||
| Net benefit cost recognized for financial reporting | 17,000,000 | 4,000,000 | ||||||||
| Pension Plan [Member] | ||||||||||
| Pension Benefits [Abstract] | ||||||||||
| Total benefit obligation | 2,871,000,000 | 3,718,000,000 | 3,964,000,000 | |||||||
| Defined Benefit Plan, Plan Assets, Amount | 2,685,000,000 | [1] | 3,670,000,000 | [1] | 3,599,000,000 | |||||
| Defined Benefit Plan, Alternative Investments, Fair Value Of Plan Assets | [1] | (882,000,000) | (1,175,000,000) | |||||||
| Net benefit cost recognized for financial reporting | $ 114,000,000 | $ 121,000,000 | $ 117,000,000 | |||||||
| Expected average long-term rate of return on assets (as a percent) | 6.49% | 6.49% | 6.87% | |||||||
| Target Pension Asset Allocations [Abstract] | ||||||||||
| Target pension asset allocations (as a percent) | 100.00% | 100.00% | ||||||||
| Pension Plan [Member] | Level 1 | ||||||||||
| Pension Benefits [Abstract] | ||||||||||
| Defined Benefit Plan, Plan Assets, Amount | [1] | $ 1,111,000,000 | $ 1,524,000,000 | |||||||
| Pension Plan [Member] | Level 2 | ||||||||||
| Pension Benefits [Abstract] | ||||||||||
| Defined Benefit Plan, Plan Assets, Amount | [1] | 689,000,000 | 966,000,000 | |||||||
| Pension Plan [Member] | Level 3 | ||||||||||
| Pension Benefits [Abstract] | ||||||||||
| Defined Benefit Plan, Plan Assets, Amount | [1] | 3,000,000 | 5,000,000 | |||||||
| Pension Plan [Member] | Equity Securities | ||||||||||
| Pension Benefits [Abstract] | ||||||||||
| Defined Benefit Plan, Plan Assets, Amount | [1] | 47,000,000 | 67,000,000 | |||||||
| Defined Benefit Plan, Alternative Investments, Fair Value Of Plan Assets | [1] | $ 0 | $ 0 | |||||||
| Target Pension Asset Allocations [Abstract] | ||||||||||
| Target pension asset allocations (as a percent) | 33.00% | 33.00% | ||||||||
| Pension Plan [Member] | Equity Securities | Level 1 | ||||||||||
| Pension Benefits [Abstract] | ||||||||||
| Defined Benefit Plan, Plan Assets, Amount | [1] | $ 47,000,000 | $ 67,000,000 | |||||||
| Pension Plan [Member] | Equity Securities | Level 2 | ||||||||||
| Pension Benefits [Abstract] | ||||||||||
| Defined Benefit Plan, Plan Assets, Amount | [1] | 0 | 0 | |||||||
| Pension Plan [Member] | Equity Securities | Level 3 | ||||||||||
| Pension Benefits [Abstract] | ||||||||||
| Defined Benefit Plan, Plan Assets, Amount | [1] | $ 0 | $ 0 | |||||||
| Pension Plan [Member] | Long-duration fixed income and interest rate swap securities | ||||||||||
| Target Pension Asset Allocations [Abstract] | ||||||||||
| Target pension asset allocations (as a percent) | 38.00% | 37.00% | ||||||||
| Pension Plan [Member] | Short-to-intermediate fixed income securities | ||||||||||
| Target Pension Asset Allocations [Abstract] | ||||||||||
| Target pension asset allocations (as a percent) | 9.00% | 11.00% | ||||||||
| Pension Plan [Member] | Alternative investments | ||||||||||
| Target Pension Asset Allocations [Abstract] | ||||||||||
| Target pension asset allocations (as a percent) | 18.00% | 17.00% | ||||||||
| Pension Plan [Member] | Cash | ||||||||||
| Pension Benefits [Abstract] | ||||||||||
| Defined Benefit Plan, Plan Assets, Amount | [1] | $ 129,000,000 | $ 133,000,000 | |||||||
| Defined Benefit Plan, Alternative Investments, Fair Value Of Plan Assets | [1] | $ 0 | $ 0 | |||||||
| Target Pension Asset Allocations [Abstract] | ||||||||||
| Target pension asset allocations (as a percent) | 2.00% | 2.00% | ||||||||
| Pension Plan [Member] | Cash | Level 1 | ||||||||||
| Pension Benefits [Abstract] | ||||||||||
| Defined Benefit Plan, Plan Assets, Amount | [1] | $ 129,000,000 | $ 133,000,000 | |||||||
| Pension Plan [Member] | Cash | Level 2 | ||||||||||
| Pension Benefits [Abstract] | ||||||||||
| Defined Benefit Plan, Plan Assets, Amount | [1] | 0 | 0 | |||||||
| Pension Plan [Member] | Cash | Level 3 | ||||||||||
| Pension Benefits [Abstract] | ||||||||||
| Defined Benefit Plan, Plan Assets, Amount | [1] | 0 | 0 | |||||||
| Pension Plan [Member] | Commingled Funds | ||||||||||
| Pension Benefits [Abstract] | ||||||||||
| Defined Benefit Plan, Plan Assets, Amount | [1] | 1,817,000,000 | 2,467,000,000 | |||||||
| Defined Benefit Plan, Alternative Investments, Fair Value Of Plan Assets | [1] | (882,000,000) | (1,143,000,000) | |||||||
| Pension Plan [Member] | Commingled Funds | Level 1 | ||||||||||
| Pension Benefits [Abstract] | ||||||||||
| Defined Benefit Plan, Plan Assets, Amount | [1] | 935,000,000 | 1,324,000,000 | |||||||
| Pension Plan [Member] | Commingled Funds | Level 2 | ||||||||||
| Pension Benefits [Abstract] | ||||||||||
| Defined Benefit Plan, Plan Assets, Amount | [1] | 0 | 0 | |||||||
| Pension Plan [Member] | Commingled Funds | Level 3 | ||||||||||
| Pension Benefits [Abstract] | ||||||||||
| Defined Benefit Plan, Plan Assets, Amount | [1] | 0 | 0 | |||||||
| Pension Plan [Member] | Debt Securities | ||||||||||
| Pension Benefits [Abstract] | ||||||||||
| Defined Benefit Plan, Plan Assets, Amount | [1] | 685,000,000 | 964,000,000 | |||||||
| Defined Benefit Plan, Alternative Investments, Fair Value Of Plan Assets | [1] | 0 | 0 | |||||||
| Pension Plan [Member] | Debt Securities | Level 1 | ||||||||||
| Pension Benefits [Abstract] | ||||||||||
| Defined Benefit Plan, Plan Assets, Amount | [1] | 0 | 0 | |||||||
| Pension Plan [Member] | Debt Securities | Level 2 | ||||||||||
| Pension Benefits [Abstract] | ||||||||||
| Defined Benefit Plan, Plan Assets, Amount | [1] | 682,000,000 | 959,000,000 | |||||||
| Pension Plan [Member] | Debt Securities | Level 3 | ||||||||||
| Pension Benefits [Abstract] | ||||||||||
| Defined Benefit Plan, Plan Assets, Amount | [1] | 3,000,000 | 5,000,000 | |||||||
| Pension Plan [Member] | Other | ||||||||||
| Pension Benefits [Abstract] | ||||||||||
| Defined Benefit Plan, Plan Assets, Amount | [1] | 7,000,000 | 39,000,000 | |||||||
| Defined Benefit Plan, Alternative Investments, Fair Value Of Plan Assets | [1] | 0 | 32,000,000 | |||||||
| Pension Plan [Member] | Other | Level 1 | ||||||||||
| Pension Benefits [Abstract] | ||||||||||
| Defined Benefit Plan, Plan Assets, Amount | [1] | 0 | 0 | |||||||
| Pension Plan [Member] | Other | Level 2 | ||||||||||
| Pension Benefits [Abstract] | ||||||||||
| Defined Benefit Plan, Plan Assets, Amount | [1] | 7,000,000 | 7,000,000 | |||||||
| Pension Plan [Member] | Other | Level 3 | ||||||||||
| Pension Benefits [Abstract] | ||||||||||
| Defined Benefit Plan, Plan Assets, Amount | [1] | 0 | 0 | |||||||
| Other Postretirement Benefits Plan [Member] | ||||||||||
| Pension Benefits [Abstract] | ||||||||||
| Total benefit obligation | 405,000,000 | 511,000,000 | $ 574,000,000 | |||||||
| Defined Benefit Plan, Plan Assets, Amount | 364,000,000 | [2] | 442,000,000 | [2] | 452,000,000 | |||||
| Defined Benefit Plan, Alternative Investments, Fair Value Of Plan Assets | [2] | (63,000,000) | (77,000,000) | |||||||
| Net benefit cost recognized for financial reporting | $ (2,000,000) | $ (2,000,000) | $ (1,000,000) | |||||||
| Expected average long-term rate of return on assets (as a percent) | 4.10% | 4.10% | 4.50% | |||||||
| Target Pension Asset Allocations [Abstract] | ||||||||||
| Target pension asset allocations (as a percent) | 100.00% | 100.00% | ||||||||
| Other Postretirement Benefits Plan [Member] | Level 1 | ||||||||||
| Pension Benefits [Abstract] | ||||||||||
| Defined Benefit Plan, Plan Assets, Amount | [2] | $ 85,000,000 | $ 92,000,000 | |||||||
| Other Postretirement Benefits Plan [Member] | Level 2 | ||||||||||
| Pension Benefits [Abstract] | ||||||||||
| Defined Benefit Plan, Plan Assets, Amount | [2] | 215,000,000 | 272,000,000 | |||||||
| Other Postretirement Benefits Plan [Member] | Level 3 | ||||||||||
| Pension Benefits [Abstract] | ||||||||||
| Defined Benefit Plan, Plan Assets, Amount | [2] | $ 1,000,000 | $ 1,000,000 | |||||||
| Other Postretirement Benefits Plan [Member] | Equity Securities | ||||||||||
| Target Pension Asset Allocations [Abstract] | ||||||||||
| Target pension asset allocations (as a percent) | 16.00% | 15.00% | ||||||||
| Other Postretirement Benefits Plan [Member] | Long-duration fixed income and interest rate swap securities | ||||||||||
| Target Pension Asset Allocations [Abstract] | ||||||||||
| Target pension asset allocations (as a percent) | 0.00% | 0.00% | ||||||||
| Other Postretirement Benefits Plan [Member] | Short-to-intermediate fixed income securities | ||||||||||
| Target Pension Asset Allocations [Abstract] | ||||||||||
| Target pension asset allocations (as a percent) | 71.00% | 71.00% | ||||||||
| Other Postretirement Benefits Plan [Member] | Alternative investments | ||||||||||
| Target Pension Asset Allocations [Abstract] | ||||||||||
| Target pension asset allocations (as a percent) | 12.00% | 8.00% | ||||||||
| Other Postretirement Benefits Plan [Member] | Cash | ||||||||||
| Pension Benefits [Abstract] | ||||||||||
| Defined Benefit Plan, Plan Assets, Amount | [2] | $ 31,000,000 | $ 28,000,000 | |||||||
| Defined Benefit Plan, Alternative Investments, Fair Value Of Plan Assets | [2] | $ 0 | $ 0 | |||||||
| Target Pension Asset Allocations [Abstract] | ||||||||||
| Target pension asset allocations (as a percent) | 1.00% | 6.00% | ||||||||
| Other Postretirement Benefits Plan [Member] | Cash | Level 1 | ||||||||||
| Pension Benefits [Abstract] | ||||||||||
| Defined Benefit Plan, Plan Assets, Amount | [2] | $ 31,000,000 | $ 28,000,000 | |||||||
| Other Postretirement Benefits Plan [Member] | Cash | Level 2 | ||||||||||
| Pension Benefits [Abstract] | ||||||||||
| Defined Benefit Plan, Plan Assets, Amount | [2] | 0 | 0 | |||||||
| Other Postretirement Benefits Plan [Member] | Cash | Level 3 | ||||||||||
| Pension Benefits [Abstract] | ||||||||||
| Defined Benefit Plan, Plan Assets, Amount | [2] | 0 | 0 | |||||||
| Other Postretirement Benefits Plan [Member] | Commingled Funds | ||||||||||
| Pension Benefits [Abstract] | ||||||||||
| Defined Benefit Plan, Plan Assets, Amount | [2] | 117,000,000 | 141,000,000 | |||||||
| Defined Benefit Plan, Alternative Investments, Fair Value Of Plan Assets | [2] | (63,000,000) | (77,000,000) | |||||||
| Other Postretirement Benefits Plan [Member] | Commingled Funds | Level 1 | ||||||||||
| Pension Benefits [Abstract] | ||||||||||
| Defined Benefit Plan, Plan Assets, Amount | [2] | 54,000,000 | 64,000,000 | |||||||
| Other Postretirement Benefits Plan [Member] | Commingled Funds | Level 2 | ||||||||||
| Pension Benefits [Abstract] | ||||||||||
| Defined Benefit Plan, Plan Assets, Amount | [2] | 0 | 0 | |||||||
| Other Postretirement Benefits Plan [Member] | Commingled Funds | Level 3 | ||||||||||
| Pension Benefits [Abstract] | ||||||||||
| Defined Benefit Plan, Plan Assets, Amount | [2] | 0 | 0 | |||||||
| Other Postretirement Benefits Plan [Member] | Debt Securities | ||||||||||
| Pension Benefits [Abstract] | ||||||||||
| Defined Benefit Plan, Plan Assets, Amount | [2] | 176,000,000 | 219,000,000 | |||||||
| Defined Benefit Plan, Alternative Investments, Fair Value Of Plan Assets | [2] | 0 | 0 | |||||||
| Other Postretirement Benefits Plan [Member] | Debt Securities | Level 1 | ||||||||||
| Pension Benefits [Abstract] | ||||||||||
| Defined Benefit Plan, Plan Assets, Amount | [2] | 0 | 0 | |||||||
| Other Postretirement Benefits Plan [Member] | Debt Securities | Level 2 | ||||||||||
| Pension Benefits [Abstract] | ||||||||||
| Defined Benefit Plan, Plan Assets, Amount | [2] | 175,000,000 | 218,000,000 | |||||||
| Other Postretirement Benefits Plan [Member] | Debt Securities | Level 3 | ||||||||||
| Pension Benefits [Abstract] | ||||||||||
| Defined Benefit Plan, Plan Assets, Amount | [2] | 1,000,000 | 1,000,000 | |||||||
| Other Postretirement Benefits Plan [Member] | Other | ||||||||||
| Pension Benefits [Abstract] | ||||||||||
| Defined Benefit Plan, Plan Assets, Amount | [2] | (1,000,000) | 2,000,000 | |||||||
| Defined Benefit Plan, Alternative Investments, Fair Value Of Plan Assets | [2] | 0 | 0 | |||||||
| Other Postretirement Benefits Plan [Member] | Other | Level 1 | ||||||||||
| Pension Benefits [Abstract] | ||||||||||
| Defined Benefit Plan, Plan Assets, Amount | [2] | 0 | 0 | |||||||
| Other Postretirement Benefits Plan [Member] | Other | Level 2 | ||||||||||
| Pension Benefits [Abstract] | ||||||||||
| Defined Benefit Plan, Plan Assets, Amount | [2] | (1,000,000) | 2,000,000 | |||||||
| Other Postretirement Benefits Plan [Member] | Other | Level 3 | ||||||||||
| Pension Benefits [Abstract] | ||||||||||
| Defined Benefit Plan, Plan Assets, Amount | [2] | 0 | 0 | |||||||
| Other Postretirement Benefits Plan [Member] | Insurance contracts | ||||||||||
| Pension Benefits [Abstract] | ||||||||||
| Defined Benefit Plan, Plan Assets, Amount | [2] | 41,000,000 | 52,000,000 | |||||||
| Defined Benefit Plan, Alternative Investments, Fair Value Of Plan Assets | [2] | 0 | 0 | |||||||
| Other Postretirement Benefits Plan [Member] | Insurance contracts | Level 1 | ||||||||||
| Pension Benefits [Abstract] | ||||||||||
| Defined Benefit Plan, Plan Assets, Amount | [2] | 0 | 0 | |||||||
| Other Postretirement Benefits Plan [Member] | Insurance contracts | Level 2 | ||||||||||
| Pension Benefits [Abstract] | ||||||||||
| Defined Benefit Plan, Plan Assets, Amount | [2] | 41,000,000 | 52,000,000 | |||||||
| Other Postretirement Benefits Plan [Member] | Insurance contracts | Level 3 | ||||||||||
| Pension Benefits [Abstract] | ||||||||||
| Defined Benefit Plan, Plan Assets, Amount | [2] | $ 0 | $ 0 | |||||||
| Forecast | Pension Plan [Member] | ||||||||||
| Pension Benefits [Abstract] | ||||||||||
| Expected average long-term rate of return on assets for next fiscal year (as a percent) | 6.93% | |||||||||
| ||||||||||
Funded Status (Details) - USD ($) |
12 Months Ended | ||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Dec. 31, 2022 |
Dec. 31, 2021 |
Dec. 31, 2020 |
|||||||||||
| Change in Fair Value of Plan Assets [Roll Forward] | |||||||||||||
| Defined Benefit Plan, Plan Assets, Payment for Settlement | $ 195,000,000 | $ 197,000,000 | |||||||||||
| Components of Net Periodic Benefit Cost (Credit) [Abstract] | |||||||||||||
| Settlement Charge Recognized in Operating and Maintenance Expenses | 2,491,000,000 | 2,321,000,000 | $ 2,324,000,000 | ||||||||||
| Pension Plan [Member] | |||||||||||||
| Defined Benefit Plan Disclosure [Line Items] | |||||||||||||
| Accumulated Benefit Obligation at Dec. 31 | 2,672,000,000 | 3,469,000,000 | |||||||||||
| Change in Projected Benefit Obligation [Roll Forward] | |||||||||||||
| Obligation at Jan. 1 | 3,718,000,000 | 3,964,000,000 | |||||||||||
| Service cost | 97,000,000 | 104,000,000 | 95,000,000 | ||||||||||
| Interest cost | 110,000,000 | 104,000,000 | 125,000,000 | ||||||||||
| Plan amendments | 1,000,000 | 5,000,000 | |||||||||||
| Actuarial loss | (703,000,000) | (94,000,000) | |||||||||||
| Defined Benefit Plan, Benefit Obligation, Contributions by Plan Participant | 0 | 0 | |||||||||||
| Defined Benefit Plan, Benefit Obligation, Prescription Drug Subsidy Receipt | 0 | 0 | |||||||||||
| Benefit payments | [1] | (352,000,000) | (365,000,000) | ||||||||||
| Obligation at Dec. 31 | 2,871,000,000 | 3,718,000,000 | 3,964,000,000 | ||||||||||
| Change in Fair Value of Plan Assets [Roll Forward] | |||||||||||||
| Fair value of plan assets at Jan. 1 | 3,670,000,000 | [2] | 3,599,000,000 | ||||||||||
| Actual return (loss) on plan assets | (683,000,000) | 305,000,000 | |||||||||||
| Employer contributions | 50,000,000 | 131,000,000 | |||||||||||
| Benefit payments | (352,000,000) | (365,000,000) | |||||||||||
| Fair value of plan assets at Dec. 31 | 2,685,000,000 | [2] | 3,670,000,000 | [2] | 3,599,000,000 | ||||||||
| Funded Status of Plans at Dec. 31 [Abstract] | |||||||||||||
| Funded status | (186,000,000) | (48,000,000) | |||||||||||
| Assets for Plan Benefits, Defined Benefit Plan | 15,000,000 | 19,000,000 | |||||||||||
| Amounts Not Yet Recognized as Components of Net Periodic Benefit Cost [Abstract] | |||||||||||||
| Net loss | 1,021,000,000 | 978,000,000 | |||||||||||
| Prior service (credit) cost | (7,000,000) | (9,000,000) | |||||||||||
| Total | 1,014,000,000 | 969,000,000 | |||||||||||
| Amounts Not Yet Recognized as Components of Net Periodic Benefit Cost Have Been Recorded as Follows Based Upon Expected Recovery in Rates [Abstract] | |||||||||||||
| Current regulatory assets | 21,000,000 | 74,000,000 | |||||||||||
| Noncurrent regulatory assets | 943,000,000 | 846,000,000 | |||||||||||
| Deferred income taxes | 14,000,000 | 13,000,000 | |||||||||||
| Net-of-tax accumulated other comprehensive income | 36,000,000 | 36,000,000 | |||||||||||
| Total | $ 1,014,000,000 | $ 969,000,000 | |||||||||||
| Significant Assumptions Used to Measure Benefit Obligations [Abstract] | |||||||||||||
| Discount rate for year-end valuation (as a percent) | 5.80% | 3.08% | |||||||||||
| Expected average long-term increase in compensation level (as a percent) | 4.25% | 3.75% | |||||||||||
| Components of Net Periodic Benefit Cost (Credit) [Abstract] | |||||||||||||
| Service cost | $ 97,000,000 | $ 104,000,000 | 95,000,000 | ||||||||||
| Interest cost | 110,000,000 | 104,000,000 | 125,000,000 | ||||||||||
| Expected return on plan assets | (208,000,000) | (206,000,000) | (208,000,000) | ||||||||||
| Amortization of prior service cost (credit) | (1,000,000) | (1,000,000) | (4,000,000) | ||||||||||
| Amortization of net loss | 75,000,000 | 107,000,000 | 100,000,000 | ||||||||||
| Settlement charge | [3] | 71,000,000 | 59,000,000 | 0 | |||||||||
| Net periodic benefit cost | 144,000,000 | 167,000,000 | 108,000,000 | ||||||||||
| Costs not recognized due to regulation | (30,000,000) | (46,000,000) | 9,000,000 | ||||||||||
| Net benefit cost recognized for financial reporting | 114,000,000 | 121,000,000 | 117,000,000 | ||||||||||
| Settlement Charge Recognized in Operating and Maintenance Expenses | $ 9,000,000 | $ 0 | $ 7 | ||||||||||
| Significant Assumptions Used to Measure Costs [Abstract] | |||||||||||||
| Discount rate (as a percent) | 3.08% | 2.71% | 3.49% | ||||||||||
| Expected average long-term increase in compensation level (as a percent) | 3.75% | 3.75% | 3.75% | ||||||||||
| Expected average long-term rate of return on assets (as a percent) | 6.49% | 6.49% | 6.87% | ||||||||||
| Defined Benefit Plan, Plan Assets, Contributions by Plan Participant | $ 0 | $ 0 | |||||||||||
| Amounts Not Yet Recognized As Components Of Net Periodic Benefit Cost Recorded As Current Regulatory Liabilities | 0 | 0 | |||||||||||
| Amounts Not Yet Recognized As Components Of Net Periodic Benefit Cost Recorded As Noncurrent Regulatory Liabilities | 0 | 0 | |||||||||||
| Other Postretirement Benefits Plan [Member] | |||||||||||||
| Change in Projected Benefit Obligation [Roll Forward] | |||||||||||||
| Obligation at Jan. 1 | 511,000,000 | 574,000,000 | |||||||||||
| Service cost | 2,000,000 | 2,000,000 | $ 1,000,000 | ||||||||||
| Interest cost | 15,000,000 | 15,000,000 | 18,000,000 | ||||||||||
| Plan amendments | 0 | 0 | |||||||||||
| Actuarial loss | (85,000,000) | (41,000,000) | |||||||||||
| Defined Benefit Plan, Benefit Obligation, Contributions by Plan Participant | 8,000,000 | 8,000,000 | |||||||||||
| Defined Benefit Plan, Benefit Obligation, Prescription Drug Subsidy Receipt | 2,000,000 | 2,000,000 | |||||||||||
| Benefit payments | [1] | (48,000,000) | (49,000,000) | ||||||||||
| Obligation at Dec. 31 | 405,000,000 | 511,000,000 | 574,000,000 | ||||||||||
| Change in Fair Value of Plan Assets [Roll Forward] | |||||||||||||
| Fair value of plan assets at Jan. 1 | 442,000,000 | [4] | 452,000,000 | ||||||||||
| Actual return (loss) on plan assets | (51,000,000) | 16,000,000 | |||||||||||
| Employer contributions | 13,000,000 | 15,000,000 | |||||||||||
| Benefit payments | (48,000,000) | (49,000,000) | |||||||||||
| Fair value of plan assets at Dec. 31 | 364,000,000 | [4] | 442,000,000 | [4] | 452,000,000 | ||||||||
| Funded Status of Plans at Dec. 31 [Abstract] | |||||||||||||
| Funded status | (41,000,000) | (69,000,000) | |||||||||||
| Assets for Plan Benefits, Defined Benefit Plan | 33,000,000 | 33,000,000 | |||||||||||
| Amounts Not Yet Recognized as Components of Net Periodic Benefit Cost [Abstract] | |||||||||||||
| Net loss | 63,000,000 | 81,000,000 | |||||||||||
| Prior service (credit) cost | (1,000,000) | (7,000,000) | |||||||||||
| Total | 62,000,000 | 74,000,000 | |||||||||||
| Amounts Not Yet Recognized as Components of Net Periodic Benefit Cost Have Been Recorded as Follows Based Upon Expected Recovery in Rates [Abstract] | |||||||||||||
| Current regulatory assets | 0 | 0 | |||||||||||
| Noncurrent regulatory assets | 78,000,000 | 90,000,000 | |||||||||||
| Deferred income taxes | 1,000,000 | 1,000,000 | |||||||||||
| Net-of-tax accumulated other comprehensive income | 4,000,000 | 3,000,000 | |||||||||||
| Total | $ 62,000,000 | $ 74,000,000 | |||||||||||
| Significant Assumptions Used to Measure Benefit Obligations [Abstract] | |||||||||||||
| Discount rate for year-end valuation (as a percent) | 5.80% | 3.09% | |||||||||||
| Defined Benefit Plan, Health Care Cost Trend Rate Assumed, Pre-65 | 6.50% | 5.30% | |||||||||||
| Defined Benefit Plan, Health Care Cost Trend Rate Assumed, Post-65 | 5.50% | 4.90% | |||||||||||
| Components of Net Periodic Benefit Cost (Credit) [Abstract] | |||||||||||||
| Service cost | $ 2,000,000 | $ 2,000,000 | 1,000,000 | ||||||||||
| Interest cost | 15,000,000 | 15,000,000 | 18,000,000 | ||||||||||
| Expected return on plan assets | (18,000,000) | (18,000,000) | (19,000,000) | ||||||||||
| Amortization of prior service cost (credit) | (6,000,000) | (8,000,000) | (8,000,000) | ||||||||||
| Amortization of net loss | 2,000,000 | 5,000,000 | 4,000,000 | ||||||||||
| Settlement charge | [3] | 0 | 0 | 0 | |||||||||
| Net periodic benefit cost | (5,000,000) | (4,000,000) | (4,000,000) | ||||||||||
| Costs not recognized due to regulation | 3,000,000 | 2,000,000 | 3,000,000 | ||||||||||
| Net benefit cost recognized for financial reporting | $ (2,000,000) | $ (2,000,000) | $ (1,000,000) | ||||||||||
| Significant Assumptions Used to Measure Costs [Abstract] | |||||||||||||
| Discount rate (as a percent) | 3.09% | 2.65% | 3.47% | ||||||||||
| Expected average long-term increase in compensation level (as a percent) | 0.00% | 0.00% | 0.00% | ||||||||||
| Expected average long-term rate of return on assets (as a percent) | 4.10% | 4.10% | 4.50% | ||||||||||
| Defined Benefit Plan, Plan Assets, Contributions by Plan Participant | $ 8,000,000 | $ 8,000,000 | |||||||||||
| Amounts Not Yet Recognized As Components Of Net Periodic Benefit Cost Recorded As Current Regulatory Liabilities | 1,000,000 | 1,000,000 | |||||||||||
| Amounts Not Yet Recognized As Components Of Net Periodic Benefit Cost Recorded As Noncurrent Regulatory Liabilities | $ 20,000,000 | $ 19,000,000 | |||||||||||
| Ultimate health care trend assumption rate (as a percent) | 4.50% | 4.50% | |||||||||||
| Period until ultimate trend rate is reached (in years) | $ 7 | $ 4 | |||||||||||
| |||||||||||||
Benefit Plans and Other Postretirement Benefits Net Periodic Benefit Cost (Credit) (Details) - USD ($) |
12 Months Ended | ||
|---|---|---|---|
Dec. 31, 2022 |
Dec. 31, 2021 |
Dec. 31, 2020 |
|
| Defined Benefit Plan Disclosure [Line Items] | |||
| Operating and maintenance expenses | $ 2,491,000,000 | $ 2,321,000,000 | $ 2,324,000,000 |
| transferred | 0 | 0 | |
| Pension Plan [Member] | |||
| Defined Benefit Plan Disclosure [Line Items] | |||
| Service cost | 97,000,000 | 104,000,000 | 95,000,000 |
| Operating and maintenance expenses | $ 9,000,000 | $ 0 | $ 7 |
Benefit Plans and Other Postretirement Benefits, Postretirement Health Care Benefits (Details) - Other Postretirement Benefits Plan [Member] |
Dec. 31, 2022 |
Dec. 31, 2021 |
|---|---|---|
| Postretirement Health Care Benefits [Abstract] | ||
| Target pension asset allocations (as a percent) | 100.00% | 100.00% |
| Equity Securities | ||
| Postretirement Health Care Benefits [Abstract] | ||
| Target pension asset allocations (as a percent) | 16.00% | 15.00% |
| Long-duration fixed income and interest rate swap securities | ||
| Postretirement Health Care Benefits [Abstract] | ||
| Target pension asset allocations (as a percent) | 0.00% | 0.00% |
| Short-to-intermediate fixed income securities | ||
| Postretirement Health Care Benefits [Abstract] | ||
| Target pension asset allocations (as a percent) | 71.00% | 71.00% |
| Alternative investments | ||
| Postretirement Health Care Benefits [Abstract] | ||
| Target pension asset allocations (as a percent) | 12.00% | 8.00% |
| Cash | ||
| Postretirement Health Care Benefits [Abstract] | ||
| Target pension asset allocations (as a percent) | 1.00% | 6.00% |
Benefit Plans and Other Postretirement Benefits, Postretirement Benefit Plan Benefit Obligations, Cash Flows and Benefit Costs (Details) - USD ($) |
12 Months Ended | ||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Dec. 31, 2022 |
Dec. 31, 2021 |
Dec. 31, 2020 |
|||||||||||
| Change in Projected Benefit Obligation [Roll Forward] | |||||||||||||
| Defined Benefit Plan, Plan Assets, Payment for Settlement | $ 195,000,000 | $ 197,000,000 | |||||||||||
| Funded Status of Plans at Dec. 31 [Abstract] | |||||||||||||
| Noncurrent liabilities | (390,000,000) | (306,000,000) | |||||||||||
| Pension Plan [Member] | |||||||||||||
| Defined Benefit Plan Disclosure [Line Items] | |||||||||||||
| Plan amendments | 1,000,000 | 5,000,000 | |||||||||||
| Change in Projected Benefit Obligation [Roll Forward] | |||||||||||||
| Obligation at Jan. 1 | 3,718,000,000 | 3,964,000,000 | |||||||||||
| Service cost | 97,000,000 | 104,000,000 | $ 95,000,000 | ||||||||||
| Interest cost | 110,000,000 | 104,000,000 | 125,000,000 | ||||||||||
| Actuarial loss | (703,000,000) | (94,000,000) | |||||||||||
| Plan participants' contributions | 0 | 0 | |||||||||||
| Medicare subsidy reimbursements | 0 | 0 | |||||||||||
| Benefit payments | [1] | (352,000,000) | (365,000,000) | ||||||||||
| Obligation at Dec. 31 | 2,871,000,000 | 3,718,000,000 | 3,964,000,000 | ||||||||||
| Change in Fair Value of Plan Assets [Roll Forward] | |||||||||||||
| Fair value of plan assets at Jan. 1 | 3,670,000,000 | [2] | 3,599,000,000 | ||||||||||
| Actual return (loss) on plan assets | (683,000,000) | 305,000,000 | |||||||||||
| Employer contributions | 50,000,000 | 131,000,000 | |||||||||||
| Participant contributions | 0 | 0 | |||||||||||
| Benefit payments | (352,000,000) | (365,000,000) | |||||||||||
| Fair value of plan assets at Dec. 31 | 2,685,000,000 | [2] | 3,670,000,000 | [2] | 3,599,000,000 | ||||||||
| Funded status | (186,000,000) | (48,000,000) | |||||||||||
| Funded Status of Plans at Dec. 31 [Abstract] | |||||||||||||
| Assets for Plan Benefits, Defined Benefit Plan | 15,000,000 | 19,000,000 | |||||||||||
| Current liabilities | 0 | 0 | |||||||||||
| Noncurrent liabilities | (201,000,000) | (67,000,000) | |||||||||||
| Net postretirement amounts recognized on consolidated balance sheets | (186,000,000) | (48,000,000) | |||||||||||
| Amounts Not Yet Recognized as Components of Net Periodic Benefit Cost [Abstract] | |||||||||||||
| Net loss | 1,021,000,000 | 978,000,000 | |||||||||||
| Prior service (credit) cost | (7,000,000) | (9,000,000) | |||||||||||
| Total | 1,014,000,000 | 969,000,000 | |||||||||||
| Amounts Not Yet Recognized as Components of Net Periodic Benefit Cost Have Been Recorded as Follows Based Upon Expected Recovery in Rates [Abstract] | |||||||||||||
| Current regulatory assets | 21,000,000 | 74,000,000 | |||||||||||
| Noncurrent regulatory assets | 943,000,000 | 846,000,000 | |||||||||||
| Current regulatory liabilities | 0 | 0 | |||||||||||
| Noncurrent regulatory liabilities | 0 | 0 | |||||||||||
| Deferred income taxes | 14,000,000 | 13,000,000 | |||||||||||
| Net-of-tax accumulated other comprehensive income | 36,000,000 | 36,000,000 | |||||||||||
| Total | $ 1,014,000,000 | $ 969,000,000 | |||||||||||
| Significant Assumptions Used to Measure Benefit Obligations [Abstract] | |||||||||||||
| Discount rate for year-end valuation (as a percent) | 5.80% | 3.08% | |||||||||||
| Components of Net Periodic Benefit Cost (Credit) [Abstract] | |||||||||||||
| Service cost | $ 97,000,000 | $ 104,000,000 | 95,000,000 | ||||||||||
| Interest cost | 110,000,000 | 104,000,000 | 125,000,000 | ||||||||||
| Expected return on plan assets | (208,000,000) | (206,000,000) | (208,000,000) | ||||||||||
| Amortization of prior service cost (credit) | (1,000,000) | (1,000,000) | (4,000,000) | ||||||||||
| Amortization of net loss | 75,000,000 | 107,000,000 | 100,000,000 | ||||||||||
| Defined Benefit Plan, Net Periodic Benefit Cost (Credit), Gain (Loss) Due to Settlement | [3] | (71,000,000) | (59,000,000) | 0 | |||||||||
| Net periodic benefit cost | $ 144,000,000 | $ 167,000,000 | $ 108,000,000 | ||||||||||
| Significant Assumptions Used to Measure Costs [Abstract] | |||||||||||||
| Discount rate (as a percent) | 3.08% | 2.71% | 3.49% | ||||||||||
| Defined Benefit Plan, Assumptions Used Calculating Net Periodic Benefit Cost, Rate of Compensation Increase | 3.75% | 3.75% | 3.75% | ||||||||||
| Expected average long-term rate of return on assets (as a percent) | 6.49% | 6.49% | 6.87% | ||||||||||
| Defined Benefit Plan, Costs Not Recognized Due To Regulation | $ (30,000,000) | $ (46,000,000) | $ 9,000,000 | ||||||||||
| Net benefit cost recognized for financial reporting | 114,000,000 | 121,000,000 | 117,000,000 | ||||||||||
| Other Postretirement Benefits Plan [Member] | |||||||||||||
| Defined Benefit Plan Disclosure [Line Items] | |||||||||||||
| Plan amendments | 0 | 0 | |||||||||||
| Change in Projected Benefit Obligation [Roll Forward] | |||||||||||||
| Obligation at Jan. 1 | 511,000,000 | 574,000,000 | |||||||||||
| Service cost | 2,000,000 | 2,000,000 | 1,000,000 | ||||||||||
| Interest cost | 15,000,000 | 15,000,000 | 18,000,000 | ||||||||||
| Actuarial loss | (85,000,000) | (41,000,000) | |||||||||||
| Plan participants' contributions | 8,000,000 | 8,000,000 | |||||||||||
| Medicare subsidy reimbursements | 2,000,000 | 2,000,000 | |||||||||||
| Benefit payments | [1] | (48,000,000) | (49,000,000) | ||||||||||
| Obligation at Dec. 31 | 405,000,000 | 511,000,000 | 574,000,000 | ||||||||||
| Change in Fair Value of Plan Assets [Roll Forward] | |||||||||||||
| Fair value of plan assets at Jan. 1 | 442,000,000 | [4] | 452,000,000 | ||||||||||
| Actual return (loss) on plan assets | (51,000,000) | 16,000,000 | |||||||||||
| Employer contributions | 13,000,000 | 15,000,000 | |||||||||||
| Participant contributions | 8,000,000 | 8,000,000 | |||||||||||
| Benefit payments | (48,000,000) | (49,000,000) | |||||||||||
| Fair value of plan assets at Dec. 31 | 364,000,000 | [4] | 442,000,000 | [4] | 452,000,000 | ||||||||
| Funded status | (41,000,000) | (69,000,000) | |||||||||||
| Funded Status of Plans at Dec. 31 [Abstract] | |||||||||||||
| Assets for Plan Benefits, Defined Benefit Plan | 33,000,000 | 33,000,000 | |||||||||||
| Current liabilities | (2,000,000) | (4,000,000) | |||||||||||
| Noncurrent liabilities | (72,000,000) | (98,000,000) | |||||||||||
| Net postretirement amounts recognized on consolidated balance sheets | (41,000,000) | (69,000,000) | |||||||||||
| Amounts Not Yet Recognized as Components of Net Periodic Benefit Cost [Abstract] | |||||||||||||
| Net loss | 63,000,000 | 81,000,000 | |||||||||||
| Prior service (credit) cost | (1,000,000) | (7,000,000) | |||||||||||
| Total | 62,000,000 | 74,000,000 | |||||||||||
| Amounts Not Yet Recognized as Components of Net Periodic Benefit Cost Have Been Recorded as Follows Based Upon Expected Recovery in Rates [Abstract] | |||||||||||||
| Current regulatory assets | 0 | 0 | |||||||||||
| Noncurrent regulatory assets | 78,000,000 | 90,000,000 | |||||||||||
| Current regulatory liabilities | (1,000,000) | (1,000,000) | |||||||||||
| Noncurrent regulatory liabilities | (20,000,000) | (19,000,000) | |||||||||||
| Deferred income taxes | 1,000,000 | 1,000,000 | |||||||||||
| Net-of-tax accumulated other comprehensive income | 4,000,000 | 3,000,000 | |||||||||||
| Total | $ 62,000,000 | $ 74,000,000 | |||||||||||
| Significant Assumptions Used to Measure Benefit Obligations [Abstract] | |||||||||||||
| Discount rate for year-end valuation (as a percent) | 5.80% | 3.09% | |||||||||||
| Defined Benefit Plan, Health Care Cost Trend Rate Assumed, Pre-65 | 6.50% | 5.30% | |||||||||||
| Defined Benefit Plan, Health Care Cost Trend Rate Assumed, Post-65 | 5.50% | 4.90% | |||||||||||
| Ultimate health care trend assumption rate (as a percent) | 4.50% | 4.50% | |||||||||||
| Period until ultimate trend rate is reached (in years) | $ 7 | $ 4 | |||||||||||
| Components of Net Periodic Benefit Cost (Credit) [Abstract] | |||||||||||||
| Service cost | 2,000,000 | 2,000,000 | 1,000,000 | ||||||||||
| Interest cost | 15,000,000 | 15,000,000 | 18,000,000 | ||||||||||
| Expected return on plan assets | (18,000,000) | (18,000,000) | (19,000,000) | ||||||||||
| Amortization of prior service cost (credit) | (6,000,000) | (8,000,000) | (8,000,000) | ||||||||||
| Amortization of net loss | 2,000,000 | 5,000,000 | 4,000,000 | ||||||||||
| Defined Benefit Plan, Net Periodic Benefit Cost (Credit), Gain (Loss) Due to Settlement | [3] | 0 | 0 | 0 | |||||||||
| Net periodic benefit cost | $ (5,000,000) | $ (4,000,000) | $ (4,000,000) | ||||||||||
| Significant Assumptions Used to Measure Costs [Abstract] | |||||||||||||
| Discount rate (as a percent) | 3.09% | 2.65% | 3.47% | ||||||||||
| Defined Benefit Plan, Assumptions Used Calculating Net Periodic Benefit Cost, Rate of Compensation Increase | 0.00% | 0.00% | 0.00% | ||||||||||
| Expected average long-term rate of return on assets (as a percent) | 4.10% | 4.10% | 4.50% | ||||||||||
| Defined Benefit Plan, Costs Not Recognized Due To Regulation | $ 3,000,000 | $ 2,000,000 | $ 3,000,000 | ||||||||||
| Net benefit cost recognized for financial reporting | $ (2,000,000) | $ (2,000,000) | $ (1,000,000) | ||||||||||
| |||||||||||||
Projected Benefit Payments (Details) - USD ($) |
1 Months Ended | 12 Months Ended | |||
|---|---|---|---|---|---|
Jan. 31, 2023 |
Dec. 31, 2023 |
Dec. 31, 2022 |
Dec. 31, 2021 |
Dec. 31, 2020 |
|
| Defined Benefit Plan, Net Projected Benefit Payments [Abstract] | |||||
| plan ammendment | $ 0 | ||||
| Pension Plan [Member] | |||||
| Defined Benefit Plan, Gross Projected Benefit Payments [Abstract] | |||||
| 2023 | 283,000,000 | ||||
| 2024 | 249,000,000 | ||||
| 2025 | 249,000,000 | ||||
| 2026 | 246,000,000 | ||||
| 2027 | 243,000,000 | ||||
| 2028 - 2032 | $ 1,162,000,000 | ||||
| Defined Benefit Plan, Net Projected Benefit Payments [Abstract] | |||||
| Target pension asset allocations (as a percent) | 100.00% | 100.00% | |||
| Pension Plan [Member] | Equity Securities [Member] | |||||
| Defined Benefit Plan, Net Projected Benefit Payments [Abstract] | |||||
| Target pension asset allocations (as a percent) | 33.00% | 33.00% | |||
| Pension Plan [Member] | Long-duration fixed income and interest rate swap securities | |||||
| Defined Benefit Plan, Net Projected Benefit Payments [Abstract] | |||||
| Target pension asset allocations (as a percent) | 38.00% | 37.00% | |||
| Pension Plan [Member] | Short-to-intermediate fixed income securities | |||||
| Defined Benefit Plan, Net Projected Benefit Payments [Abstract] | |||||
| Target pension asset allocations (as a percent) | 9.00% | 11.00% | |||
| Pension Plan [Member] | Alternative investments | |||||
| Defined Benefit Plan, Net Projected Benefit Payments [Abstract] | |||||
| Target pension asset allocations (as a percent) | 18.00% | 17.00% | |||
| Pension Plan [Member] | Cash equivalents | |||||
| Defined Benefit Plan, Net Projected Benefit Payments [Abstract] | |||||
| Target pension asset allocations (as a percent) | 2.00% | 2.00% | |||
| Pension Plan [Member] | Xcel Energy [Member] | |||||
| Defined Benefit Plan, Net Projected Benefit Payments [Abstract] | |||||
| Payment for Pension Benefits | $ 50,000,000 | $ 131,000,000 | $ 150,000,000 | ||
| Pension Plan [Member] | Xcel Energy [Member] | Subsequent Event | |||||
| Defined Benefit Plan, Net Projected Benefit Payments [Abstract] | |||||
| Payment for Pension Benefits | $ 50,000,000 | ||||
| Other Postretirement Benefits Plan [Member] | |||||
| Defined Benefit Plan, Gross Projected Benefit Payments [Abstract] | |||||
| 2023 | 42,000,000 | ||||
| 2024 | 41,000,000 | ||||
| 2025 | 40,000,000 | ||||
| 2026 | 39,000,000 | ||||
| 2027 | 37,000,000 | ||||
| 2028 - 2032 | 167,000,000 | ||||
| Expected Medicare Part D Subsidies [Abstract] | |||||
| 2023 | 2,000,000 | ||||
| 2024 | 2,000,000 | ||||
| 2025 | 2,000,000 | ||||
| 2026 | 2,000,000 | ||||
| 2027 | 2,000,000 | ||||
| 2028-2032 | 12,000,000 | ||||
| Defined Benefit Plan, Net Projected Benefit Payments [Abstract] | |||||
| 2023 | 40,000,000 | ||||
| 2024 | 39,000,000 | ||||
| 2025 | 38,000,000 | ||||
| 2026 | 37,000,000 | ||||
| 2027 | 35,000,000 | ||||
| 2028 - 2032 | $ 155,000,000 | ||||
| Target pension asset allocations (as a percent) | 100.00% | 100.00% | |||
| Other Postretirement Benefits Plan [Member] | Equity Securities [Member] | |||||
| Defined Benefit Plan, Net Projected Benefit Payments [Abstract] | |||||
| Target pension asset allocations (as a percent) | 16.00% | 15.00% | |||
| Other Postretirement Benefits Plan [Member] | Long-duration fixed income and interest rate swap securities | |||||
| Defined Benefit Plan, Net Projected Benefit Payments [Abstract] | |||||
| Target pension asset allocations (as a percent) | 0.00% | 0.00% | |||
| Other Postretirement Benefits Plan [Member] | Short-to-intermediate fixed income securities | |||||
| Defined Benefit Plan, Net Projected Benefit Payments [Abstract] | |||||
| Target pension asset allocations (as a percent) | 71.00% | 71.00% | |||
| Other Postretirement Benefits Plan [Member] | Alternative investments | |||||
| Defined Benefit Plan, Net Projected Benefit Payments [Abstract] | |||||
| Target pension asset allocations (as a percent) | 12.00% | 8.00% | |||
| Other Postretirement Benefits Plan [Member] | Cash equivalents | |||||
| Defined Benefit Plan, Net Projected Benefit Payments [Abstract] | |||||
| Target pension asset allocations (as a percent) | 1.00% | 6.00% | |||
| Defined Benefit Plan, Overfunded Plan [Member] | Xcel Energy [Member] | |||||
| Defined Benefit Plan, Net Projected Benefit Payments [Abstract] | |||||
| Payment for Pension Benefits | $ 13,000,000 | $ 15,000,000 | $ 11,000,000 | ||
| Defined Benefit Plan, Overfunded Plan [Member] | Xcel Energy [Member] | Subsequent Event | |||||
| Defined Benefit Plan, Net Projected Benefit Payments [Abstract] | |||||
| Payment for Pension Benefits | $ 12,000,000 | ||||
Benefit Plans and Other Postretirement Benefits Defined Contribution Plans (Details) - USD ($) $ in Millions |
12 Months Ended | ||
|---|---|---|---|
Dec. 31, 2022 |
Dec. 31, 2021 |
Dec. 31, 2020 |
|
| Retirement Benefits [Abstract] | |||
| Defined Contribution Plan, Cost | $ 46 | $ 43 | $ 42 |
| Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items] | |||
| Defined Contribution Plan, Cost | $ 46 | $ 43 | $ 42 |
Benefit Plans and Other Postretirement Benefits Plan Amendments (Details) |
Dec. 31, 2022
USD ($)
|
|---|---|
| Defined Benefit Plan Disclosure [Line Items] | |
| plan ammendment | $ 0 |
Commitments and Contingencies Gas Trading Litigation (Details) |
Dec. 31, 2022 |
|---|---|
| WYCO, Inc. [Member] | |
| Loss Contingencies [Line Items] | |
| Equity Method Investment, Ownership Percentage | 50.00% |
| Gas Trading Litigation [Member] | |
| Loss Contingencies [Line Items] | |
| Loss Contingency, Pending Claims, Number | 1 |
Commitments and Contingencies Sherco (Details) - USD ($) $ in Millions |
1 Months Ended | |
|---|---|---|
Jan. 31, 2021 |
Jan. 27, 2021 |
|
| Public Utilities, General Disclosures [Line Items] | ||
| Amount MPUC previously disallowed related to Sherco outage | $ 22 | |
| NSP Minnesota | ||
| Public Utilities, General Disclosures [Line Items] | ||
| Customer refund of previously recovered purchased power costs | $ 17 |
Commitments and Contingencies MISO ROE Complaints (Details) - Federal Energy Regulatory Commission (FERC) [Member] - NSP Minnesota and NSP Wisconsin [Member] [Member] - FERC Proceeding, MISO ROE Complaint [Member] |
1 Months Ended | |
|---|---|---|
Feb. 28, 2015 |
Nov. 30, 2013 |
|
| Public Utilities, General Disclosures [Line Items] | ||
| Public Utilities, Base Return On Equity Charged To Customers Through Transmission Formula Rates | 12.38% | 12.38% |
| Public Utilities, ROE Applicable To Transmission Formula Rates In The MISO Region, Recommended By Third Parties | 8.67% | 9.15% |
Commitments and Contingencies SPP OATT Upgrade Costs (Details) $ in Millions |
12 Months Ended |
|---|---|
|
Dec. 31, 2018
USD ($)
| |
| SPS | Southwest Power Pool (SPP) [Member] | SPP Open Access Transmission Tariff Upgrade Costs [Member] | |
| Loss Contingencies [Line Items] | |
| Public Utilities, Billed Charges For Transmission Service Upgrades | $ 13 |
Commitment and Contingencies Wind Operating Commitments (Details) |
Dec. 31, 2022 |
|---|---|
| SPS | |
| Loss Contingencies [Line Items] | |
| Wind Operating Commitments, minimum net capacity factor | 48.00% |
Commitments and Contingencies MGP Sites (Details) |
Dec. 31, 2022
Site
|
|---|---|
| Other MGP, Landfill, or Disposal Sites [Member] | |
| Loss Contingencies [Line Items] | |
| Number of identified MGP, landfill, or disposal sites under current investigation and/or remediation | 9 |
Environmental Requirements - Water and Waste (Details) $ in Millions |
Dec. 31, 2022
USD ($)
Reactor
|
|---|---|
| Loss Contingencies [Line Items] | |
| Number of sites where regulated ash units will still be in operation at a specified date | Reactor | 8 |
| Federal Coal Ash Regulation [Member] | PSCo | |
| Loss Contingencies [Line Items] | |
| Estimated cost to remediate groundwater sampling results | $ 35 |
| Federal Coal Ash Regulation [Member] | PSCo | Maximum | |
| Loss Contingencies [Line Items] | |
| Cost of Beneficial Use Coal Ash Project | 45 |
| Federal Clean Water Act Section 316 (b) | Capital Addition Purchase Commitments [Member] | |
| Loss Contingencies [Line Items] | |
| Liability for estimated cost to comply with regulation | $ 45 |
AROs (Details) - USD ($) $ in Millions |
12 Months Ended | |||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
Dec. 31, 2022 |
Dec. 31, 2021 |
|||||||||||
| Asset Retirement Obligation, Roll Forward Analysis [Roll Forward] | ||||||||||||
| Beginning balance | $ 3,151 | $ 2,884 | ||||||||||
| Amounts Incurred | 59 | [1] | 107 | [2] | ||||||||
| Accretion | 148 | 138 | ||||||||||
| Cash flow revisions | 22 | [3] | 22 | [4] | ||||||||
| Ending balance | 3,380 | 3,151 | ||||||||||
| Fair Value, Recurring [Member] | Estimate of Fair Value Measurement [Member] | ||||||||||||
| Asset Retirement Obligation, Roll Forward Analysis [Roll Forward] | ||||||||||||
| Decommissioning fund investments | 2,882 | 3,256 | ||||||||||
| Fair Value, Recurring [Member] | Nuclear Decommissioning Fund | Estimate of Fair Value Measurement [Member] | NSP Minnesota | ||||||||||||
| Asset Retirement Obligation, Roll Forward Analysis [Roll Forward] | ||||||||||||
| Decommissioning fund investments | 2,900 | 3,300 | ||||||||||
| Electric Plant Nuclear Production Decommissioning | ||||||||||||
| Asset Retirement Obligation, Roll Forward Analysis [Roll Forward] | ||||||||||||
| Beginning balance | 2,056 | 1,957 | ||||||||||
| Amounts Incurred | 0 | [1] | 0 | [2] | ||||||||
| Accretion | 104 | 99 | ||||||||||
| Cash flow revisions | 0 | [3] | 0 | [4] | ||||||||
| Ending balance | 2,160 | 2,056 | ||||||||||
| Electric Plant Wind Production | ||||||||||||
| Asset Retirement Obligation, Roll Forward Analysis [Roll Forward] | ||||||||||||
| Beginning balance | 478 | 360 | ||||||||||
| Amounts Incurred | 25 | [1] | 101 | [2] | ||||||||
| Accretion | 19 | 17 | ||||||||||
| Cash flow revisions | (8) | [3] | 0 | [4] | ||||||||
| Ending balance | 514 | 478 | ||||||||||
| Electric Plant Steam, Hydro and Other Production Asbestos | ||||||||||||
| Asset Retirement Obligation, Roll Forward Analysis [Roll Forward] | ||||||||||||
| Beginning balance | 288 | 264 | ||||||||||
| Amounts Incurred | 34 | [1] | 6 | [2] | ||||||||
| Accretion | 12 | 10 | ||||||||||
| Cash flow revisions | 14 | [3] | 8 | [4] | ||||||||
| Ending balance | 348 | 288 | ||||||||||
| Electric Plant Electric Distribution | ||||||||||||
| Asset Retirement Obligation, Roll Forward Analysis [Roll Forward] | ||||||||||||
| Beginning balance | 47 | 46 | ||||||||||
| Amounts Incurred | 0 | [1] | 0 | [2] | ||||||||
| Accretion | 1 | 1 | ||||||||||
| Cash flow revisions | 0 | [3] | 0 | [4] | ||||||||
| Ending balance | 48 | 47 | ||||||||||
| Natural Gas Plant Gas Transmission and Distribution | ||||||||||||
| Asset Retirement Obligation, Roll Forward Analysis [Roll Forward] | ||||||||||||
| Beginning balance | 271 | 252 | ||||||||||
| Amounts Incurred | 0 | [1] | 0 | [2] | ||||||||
| Accretion | 12 | 10 | ||||||||||
| Cash flow revisions | 23 | [3] | 9 | [4] | ||||||||
| Ending balance | 306 | 271 | ||||||||||
| Natural Gas Plant Miscellaneous | ||||||||||||
| Asset Retirement Obligation, Roll Forward Analysis [Roll Forward] | ||||||||||||
| Beginning balance | 8 | 3 | ||||||||||
| Amounts Incurred | 0 | [1] | 0 | [2] | ||||||||
| Accretion | 0 | 0 | ||||||||||
| Cash flow revisions | (7) | [3] | 5 | [4] | ||||||||
| Ending balance | 1 | 8 | ||||||||||
| Common and Other Property Common Miscellaneous | ||||||||||||
| Asset Retirement Obligation, Roll Forward Analysis [Roll Forward] | ||||||||||||
| Beginning balance | 1 | 1 | ||||||||||
| Amounts Incurred | 0 | [1] | 0 | [2] | ||||||||
| Accretion | 0 | 0 | ||||||||||
| Cash flow revisions | 0 | [3] | 0 | [4] | ||||||||
| Ending balance | 1 | 1 | ||||||||||
| Non utility and other | ||||||||||||
| Asset Retirement Obligation, Roll Forward Analysis [Roll Forward] | ||||||||||||
| Beginning balance | 2 | 1 | ||||||||||
| Amounts Incurred | 0 | [1] | 0 | [2] | ||||||||
| Accretion | 0 | 1 | ||||||||||
| Cash flow revisions | 0 | [3] | 0 | [4] | ||||||||
| Ending balance | $ 2 | $ 2 | ||||||||||
| ||||||||||||
Indeterminate AROs (Details) $ in Millions |
Dec. 31, 2022
USD ($)
|
|---|---|
| Asset Retirement Obligations [Line Items] | |
| Indeterminate Costs Incurred, Asset Retirement Obligation Due to Asbestos | $ 0 |
Nuclear Insurance (Details) - NSP Minnesota - Nuclear Insurance $ in Millions |
12 Months Ended |
|---|---|
|
Dec. 31, 2022
USD ($)
Reactor
Plant
| |
| Nuclear Insurance [Abstract] | |
| Nuclear insurance coverage secured for the Company's public liability exposure | $ 450 |
| Nuclear insurance coverage exposure funded by the Secondary Financial Protection Program | 13,200 |
| Maximum assessments per reactor per accident | $ 138 |
| Number of owned and licensed reactors | Reactor | 3 |
| Maximum funding requirement per reactor for any one year | $ 20 |
| Number of nuclear plant sites operated by NSP-Minnesota | Plant | 2 |
| Maximum assessments for business interruption insurance each calendar year | $ 12 |
| Maximum assessment for property damage insurance NSP-Minnesota is subject to each calendar year | 32 |
| Maximum | |
| Nuclear Insurance [Abstract] | |
| Loss Contingency, Estimate of Possible Loss | 13,700 |
| Insurance coverage limits for NSP-Minnesota's nuclear plant sites | 2,800 |
| Business Interruption Insurance Coverage Provided by NEIL | $ 350 |
Nuclear Fuel Disposal (Details) - NSP Minnesota |
Dec. 31, 2022
Canister
|
|---|---|
| Monticello [Member] | |
| Loss Contingencies [Line Items] | |
| Number Of Authorized Canisters Filled And Placed In Dry Cask Nuclear Storage Facility | 30 |
| Prairie Island [Member] | |
| Loss Contingencies [Line Items] | |
| Number Of Authorized Canisters Filled And Placed In Dry Cask Nuclear Storage Facility | 50 |
| Number Of Authorized Canisters In Dry Cask Nuclear Storage Facility | 64 |
Regulatory Plant Decommissioning Recovery (Details) - USD ($) $ in Millions |
Dec. 31, 2022 |
Dec. 31, 2021 |
Dec. 31, 2020 |
|---|---|---|---|
| Regulatory Basis to GAAP Basis Reconciliation [Abstract] | |||
| Asset Retirement Obligation | $ 3,380 | $ 3,151 | $ 2,884 |
| Nuclear Plant [Member] | |||
| Regulatory Basis to GAAP Basis Reconciliation [Abstract] | |||
| Asset Retirement Obligation | 2,160 | 2,056 | $ 1,957 |
| Estimate of Fair Value Measurement [Member] | Fair Value, Recurring [Member] | |||
| Funded Status of Nuclear Decommissioning Obligation [Abstract] | |||
| Decommissioning fund investments | $ 2,882 | 3,256 | |
| NSP Minnesota | |||
| Regulatory Plant Decommissioning Recovery [Abstract] | |||
| Percentage Of Total Obligation For Decommissioning Expected To Be Funded By External Funds | 100.00% | ||
| NSP Minnesota | Nuclear Decommissioning Fund | Estimate of Fair Value Measurement [Member] | Fair Value, Recurring [Member] | |||
| Funded Status of Nuclear Decommissioning Obligation [Abstract] | |||
| Decommissioning fund investments | $ 2,900 | $ 3,300 |
Leases (Details) - USD ($) |
12 Months Ended | ||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Dec. 31, 2022 |
Dec. 31, 2021 |
Dec. 31, 2020 |
|||||||||||
| Lessee, Lease, Description [Line Items] | |||||||||||||
| Maximum Length - Short-Term Leases | 12 months | ||||||||||||
| Operating Lease, Weighted Average Discount Rate, Percent | 4.10% | ||||||||||||
| Operating Lease ROU Assets | |||||||||||||
| Gross operating lease ROU assets | $ 1,913,000,000 | $ 1,881,000,000 | |||||||||||
| Accumulated amortization | (709,000,000) | (590,000,000) | |||||||||||
| Net operating lease ROU assets | 1,204,000,000 | 1,291,000,000 | |||||||||||
| Finance Lease ROU Assets | |||||||||||||
| Gross finance lease ROU assets | 181,000,000 | 222,000,000 | |||||||||||
| Accumulated amortization | $ (64,000,000) | $ (97,000,000) | |||||||||||
| Finance Lease, Right-of-Use Asset, Statement of Financial Position [Extensible Enumeration] | Other assets | Other assets | |||||||||||
| Net finance lease ROU assets | $ 117,000,000 | $ 125,000,000 | |||||||||||
| Components of Lease Expense | |||||||||||||
| Operating Lease, Cost | [1] | 280,000,000 | 287,000,000 | $ 264,000,000 | |||||||||
| Finance Lease, Right-of-Use Asset, Amortization | 4,000,000 | 7,000,000 | 7,000,000 | ||||||||||
| Finance Lease, Interest Expense | 16,000,000 | 17,000,000 | 18,000,000 | ||||||||||
| Finance Lease, Cost | 20,000,000 | 24,000,000 | 25,000,000 | ||||||||||
| Short-term Lease, Cost | 6,000,000 | 6,000,000 | 6,000,000 | ||||||||||
| Operating Lease Commitments | |||||||||||||
| 2023 | 264,000,000 | ||||||||||||
| 2024 | 266,000,000 | ||||||||||||
| 2025 | 240,000,000 | ||||||||||||
| 2026 | 179,000,000 | ||||||||||||
| 2027 | 108,000,000 | ||||||||||||
| Thereafter | 400,000,000 | ||||||||||||
| Total minimum obligation | 1,457,000,000 | ||||||||||||
| Interest component of obligation | (202,000,000) | ||||||||||||
| Regulatory liabilities | 1,255,000,000 | ||||||||||||
| Less current portion | $ (217,000,000) | $ (205,000,000) | |||||||||||
| Finance Lease, Liability, Noncurrent, Statement of Financial Position [Extensible Enumeration] | Other liabilities | Other liabilities | |||||||||||
| Noncurrent operating and finance lease liabilities | $ 1,038,000,000 | $ 1,146,000,000 | |||||||||||
| Operating Lease, Weighted Average Remaining Lease Term | 7.9 | ||||||||||||
| Finance Lease, Liability, Payment, Due [Abstract] | |||||||||||||
| 2023 | [2] | 10,000,000 | |||||||||||
| 2024 | [2] | 10,000,000 | |||||||||||
| 2025 | [2] | 10,000,000 | |||||||||||
| 2026 | [2] | 9,000,000 | |||||||||||
| 2027 | [2] | 8,000,000 | |||||||||||
| Thereafter | [2] | 181,000,000 | |||||||||||
| Total minimum obligation | [2] | 228,000,000 | |||||||||||
| Interest component of obligation | [2] | (162,000,000) | |||||||||||
| Present value of minimum obligation | [2] | 66,000,000 | |||||||||||
| Finance Lease, Liability, Current | [2] | (2,000,000) | |||||||||||
| Finance Lease, Liability, Noncurrent | [2] | 64,000,000 | |||||||||||
| Finance Lease, Weighted Average Remaining Lease Term | [2] | 37.8 | |||||||||||
| Purchased Power Agreements | |||||||||||||
| Operating Lease ROU Assets | |||||||||||||
| Gross operating lease ROU assets | 1,669,000,000 | 1,656,000,000 | |||||||||||
| Components of Lease Expense | |||||||||||||
| Operating Lease, Cost | 241,000,000 | 251,000,000 | 238,000,000 | ||||||||||
| Operating Lease Commitments | |||||||||||||
| 2023 | [3],[4] | 231,000,000 | |||||||||||
| 2024 | [3],[4] | 238,000,000 | |||||||||||
| 2025 | [3],[4] | 217,000,000 | |||||||||||
| 2026 | [3],[4] | 161,000,000 | |||||||||||
| 2027 | [3],[4] | 90,000,000 | |||||||||||
| Thereafter | [3],[4] | 326,000,000 | |||||||||||
| Total minimum obligation | [3],[4] | 1,263,000,000 | |||||||||||
| Interest component of obligation | [3],[4] | (170,000,000) | |||||||||||
| Regulatory liabilities | [3],[4] | 1,093,000,000 | |||||||||||
| Other Operating Lease [Domain] | |||||||||||||
| Operating Lease ROU Assets | |||||||||||||
| Gross operating lease ROU assets | 244,000,000 | 225,000,000 | |||||||||||
| Components of Lease Expense | |||||||||||||
| Operating Lease, Cost | [5] | 39,000,000 | 36,000,000 | $ 26,000,000 | |||||||||
| Operating Lease Commitments | |||||||||||||
| 2023 | 33,000,000 | ||||||||||||
| 2024 | 28,000,000 | ||||||||||||
| 2025 | 23,000,000 | ||||||||||||
| 2026 | 18,000,000 | ||||||||||||
| 2027 | 18,000,000 | ||||||||||||
| Thereafter | 74,000,000 | ||||||||||||
| Total minimum obligation | 194,000,000 | ||||||||||||
| Interest component of obligation | (32,000,000) | ||||||||||||
| Regulatory liabilities | 162,000,000 | ||||||||||||
| Gas Storage Facilities [Member] | |||||||||||||
| Finance Lease ROU Assets | |||||||||||||
| Gross finance lease ROU assets | 160,000,000 | 201,000,000 | |||||||||||
| Pipelines [Member] | |||||||||||||
| Finance Lease ROU Assets | |||||||||||||
| Gross finance lease ROU assets | $ 21,000,000 | $ 21,000,000 | |||||||||||
| |||||||||||||
Non Lease PPAs (Details) - USD ($) $ in Millions |
12 Months Ended | ||||
|---|---|---|---|---|---|
Dec. 31, 2022 |
Dec. 31, 2021 |
Dec. 31, 2020 |
|||
| Capacity | |||||
| Purchased Power Agreements (PPAs) [Abstract] | |||||
| Purchased power expense | $ 75 | $ 69 | $ 75 | ||
| Estimated Future Payments Under PPAs [Abstract] | |||||
| 2023 | 77 | ||||
| 2024 | 72 | ||||
| 2025 | 29 | ||||
| 2026 | 10 | ||||
| 2027 | 7 | ||||
| Thereafter | 3 | ||||
| Total | 198 | ||||
| Energy | |||||
| Purchased Power Agreements (PPAs) [Abstract] | |||||
| Purchased power expense | 182 | $ 149 | $ 112 | ||
| Estimated Future Payments Under PPAs [Abstract] | |||||
| 2023 | [1] | 50 | |||
| 2024 | [1] | 45 | |||
| 2025 | [1] | 51 | |||
| 2026 | [1] | 48 | |||
| 2027 | [1] | 55 | |||
| Thereafter | [1] | 28 | |||
| Total | [1] | $ 277 | |||
| |||||
Fuel Contracts (Details) $ in Millions |
Dec. 31, 2022
USD ($)
|
|---|---|
| Coal | |
| Fuel Contracts [Abstract] | |
| 2023 | $ 628 |
| 2024 | 343 |
| 2025 | 90 |
| 2026 | 53 |
| 2027 | 55 |
| Thereafter | 2 |
| Total | 1,171 |
| Nuclear Fuel | |
| Fuel Contracts [Abstract] | |
| 2023 | 144 |
| 2024 | 112 |
| 2025 | 158 |
| 2026 | 37 |
| 2027 | 155 |
| Thereafter | 194 |
| Total | 800 |
| Natural Gas Supply | |
| Fuel Contracts [Abstract] | |
| 2023 | 684 |
| 2024 | 8 |
| 2025 | 1 |
| 2026 | 0 |
| 2027 | 0 |
| Thereafter | 0 |
| Total | 693 |
| Natural Gas Storage and Transportation | |
| Fuel Contracts [Abstract] | |
| 2023 | 316 |
| 2024 | 290 |
| 2025 | 276 |
| 2026 | 276 |
| 2027 | 225 |
| Thereafter | 607 |
| Total | $ 1,990 |
VIEs - PPAs (Details) - MW |
Dec. 31, 2022 |
Dec. 31, 2021 |
|---|---|---|
| Equity Method Investment, Nonconsolidated Investee or Group of Investees [Member] | ||
| Purchased Power Agreements [Abstract] | ||
| Generating capacity (in MW) | 3,961 | 4,062 |
Low-Income Housing Limited Partnerships (Details) - USD ($) $ in Millions |
Dec. 31, 2022 |
Dec. 31, 2021 |
|---|---|---|
| Variable Interest Entity [Line Items] | ||
| Total assets | $ 61,188 | $ 57,851 |
| Variable Interest Entity, Primary Beneficiary | ||
| Variable Interest Entity [Line Items] | ||
| Total assets | 44 | 45 |
| Variable Interest Entity, Consolidated, Carrying Amount, Liabilities | $ 35 | $ 35 |
Technology Agreements (Details) - USD ($) $ in Millions |
12 Months Ended | ||
|---|---|---|---|
Dec. 31, 2022 |
Dec. 31, 2021 |
Dec. 31, 2020 |
|
| Technology Agreements [Abstract] | |||
| Technology Agreement Expiration | 2027 | ||
| Information Technology and Data Processing | $ 181 | $ 103 | $ 110 |
| Technology Agreements | |||
| Technology Agreements, Minimum Payments Due [Abstract] | |||
| Long Term Purchase Commitment Technology Agreement - Current | 24 | ||
| Long Term Purchase Commitment Technology Agreement Future Minimum Payments Due, Year 2 | 13 | ||
| Long Term Purchase Commitment Technology Agreement Future Minimum Payments Due, Year 3 | 12 | ||
| Long Term Purchase Commitment Technology Agreement Future Minimum Payments Due, Year 4 | 11 | ||
| Long Term Purchase Commitment Technology Agreement Future Minimum Payments Due, Year 5 | 10 | ||
| Long Term Purchase Commitment Technology Agreement Future Minimum Payments Due, Thereafter | $ 0 | ||
Guarantees and Bond Indemnifications (Details) - USD ($) |
Dec. 31, 2022 |
Dec. 31, 2021 |
|---|---|---|
| Commitments and Contingencies Disclosure [Abstract] | ||
| Assets Held As Collateral For Guarantor Obligations | $ 0 | $ 0 |
| Guarantor Obligations, Maximum Exposure, Undiscounted | 62,000,000 | 60,000,000 |
| Guarantor Obligations, Maximum Exposure, Undiscounted | $ 62,000,000 | $ 60,000,000 |
Commitments and Contingencies Comanche Unit 3 Litigation $ in Millions |
Dec. 31, 2022
USD ($)
|
|---|---|
| Guarantees and Product Warranties [Abstract] | |
| Comanche Unit 3 Litigation | $ 270 |
Other Comprehensive Income (Details) - USD ($) $ in Millions |
12 Months Ended | ||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Dec. 31, 2022 |
Dec. 31, 2021 |
Dec. 31, 2020 |
|||||||||||
| AOCI Attributable to Parent, Net of Tax [Roll Forward] | |||||||||||||
| Accumulated other comprehensive income (loss) at beginning of period | $ 15,612 | ||||||||||||
| Total income tax benefit | (135) | $ (70) | $ (6) | ||||||||||
| Accumulated other comprehensive income (loss) at end of period | 16,675 | 15,612 | |||||||||||
| Gains and Losses on Cash Flow Hedges | |||||||||||||
| AOCI Attributable to Parent, Net of Tax [Roll Forward] | |||||||||||||
| Accumulated other comprehensive income (loss) at beginning of period | (75) | (85) | |||||||||||
| Other comprehensive loss before reclassifications, net of tax | 16 | 4 | |||||||||||
| Amortization of net actuarial loss | 0 | 0 | |||||||||||
| Net current period other comprehensive income (loss) | 21 | 10 | |||||||||||
| Accumulated other comprehensive income (loss) at end of period | (54) | (75) | (85) | ||||||||||
| Gains and Losses on Cash Flow Hedges | Interest Rate Swap | |||||||||||||
| AOCI Attributable to Parent, Net of Tax [Roll Forward] | |||||||||||||
| Amortization of net actuarial loss | (5) | [1] | (6) | [2] | |||||||||
| Defined Benefit Pension and Postretirement Items | |||||||||||||
| AOCI Attributable to Parent, Net of Tax [Roll Forward] | |||||||||||||
| Accumulated other comprehensive income (loss) at beginning of period | (48) | (56) | |||||||||||
| Other comprehensive loss before reclassifications, net of tax | 5 | 0 | |||||||||||
| Amortization of net actuarial loss | (4) | [3] | (8) | [4] | |||||||||
| Net current period other comprehensive income (loss) | 9 | 8 | |||||||||||
| Accumulated other comprehensive income (loss) at end of period | (39) | (48) | (56) | ||||||||||
| Defined Benefit Pension and Postretirement Items | Interest Rate Swap | |||||||||||||
| AOCI Attributable to Parent, Net of Tax [Roll Forward] | |||||||||||||
| Amortization of net actuarial loss | 0 | 0 | |||||||||||
| Total | |||||||||||||
| AOCI Attributable to Parent, Net of Tax [Roll Forward] | |||||||||||||
| Accumulated other comprehensive income (loss) at beginning of period | (123) | (141) | |||||||||||
| Other comprehensive loss before reclassifications, net of tax | 21 | 4 | |||||||||||
| Amortization of net actuarial loss | (4) | (8) | |||||||||||
| Net current period other comprehensive income (loss) | 30 | 18 | |||||||||||
| Accumulated other comprehensive income (loss) at end of period | (93) | (123) | $ (141) | ||||||||||
| Total | Interest Rate Swap | |||||||||||||
| AOCI Attributable to Parent, Net of Tax [Roll Forward] | |||||||||||||
| Amortization of net actuarial loss | $ (5) | $ (6) | |||||||||||
| |||||||||||||
Segments and Related Information (Details) - USD ($) $ in Millions |
12 Months Ended | ||
|---|---|---|---|
Dec. 31, 2022 |
Dec. 31, 2021 |
Dec. 31, 2020 |
|
| Segment Reporting Information [Line Items] | |||
| Investment in subsidiaries | $ 219 | $ 208 | |
| Regulated Electric | 12,123 | 11,205 | $ 9,802 |
| Natural Gas | 3,080 | 2,132 | 1,636 |
| Other | 107 | 94 | 88 |
| Regulated and Unregulated Operating Revenue | 15,310 | 13,431 | 11,526 |
| Depreciation and amortization | 2,413 | 2,121 | 1,948 |
| Interest charges and financing costs | 925 | 816 | 798 |
| Total income tax benefit | (135) | (70) | (6) |
| Net income (loss) | 1,736 | 1,597 | 1,473 |
| Regulated Electric | |||
| Segment Reporting Information [Line Items] | |||
| Revenues Including Intersegment Revenues | 12,125 | 11,207 | 9,804 |
| Depreciation and amortization | 2,122 | 1,855 | 1,673 |
| Interest charges and financing costs | 636 | 568 | 534 |
| Total income tax benefit | (162) | (96) | 1 |
| Net income (loss) | 1,631 | 1,478 | 1,407 |
| Regulated Natural Gas | |||
| Segment Reporting Information [Line Items] | |||
| Revenues Including Intersegment Revenues | 3,082 | 2,134 | 1,637 |
| Depreciation and amortization | 276 | 254 | 252 |
| Interest charges and financing costs | 86 | 75 | 71 |
| Total income tax benefit | 68 | 54 | 17 |
| Net income (loss) | 264 | 231 | 190 |
| All Other | |||
| Segment Reporting Information [Line Items] | |||
| Depreciation and amortization | 15 | 12 | 23 |
| Interest charges and financing costs | 203 | 173 | 193 |
| Total income tax benefit | (41) | (28) | (24) |
| Net income (loss) | (159) | (112) | (124) |
| Total revenues | |||
| Segment Reporting Information [Line Items] | |||
| Regulated and Unregulated Operating Revenue | 15,314 | 13,435 | 11,529 |
| Total revenues | Regulated Electric | |||
| Segment Reporting Information [Line Items] | |||
| Regulated Electric | 12,123 | 11,205 | 9,802 |
| Total revenues | Regulated Natural Gas | |||
| Segment Reporting Information [Line Items] | |||
| Natural Gas | 3,080 | 2,132 | 1,636 |
| Total revenues | All Other | |||
| Segment Reporting Information [Line Items] | |||
| Other | 107 | 94 | 88 |
| Intersegment Eliminations | |||
| Segment Reporting Information [Line Items] | |||
| Regulated and Unregulated Operating Revenue | (4) | (4) | (3) |
| Intersegment Eliminations | Regulated Electric | |||
| Segment Reporting Information [Line Items] | |||
| Regulated Electric | 2 | 2 | 2 |
| Intersegment Eliminations | Regulated Natural Gas | |||
| Segment Reporting Information [Line Items] | |||
| Natural Gas | $ 2 | $ 2 | $ 1 |
Condensed Statements of Income and Comprehensive Income (Details) - USD ($) $ / shares in Units, shares in Millions, $ in Millions |
12 Months Ended | ||||
|---|---|---|---|---|---|
Dec. 31, 2022 |
Dec. 31, 2021 |
Dec. 31, 2020 |
|||
| Income | |||||
| Income (Loss) from Equity Method Investments | $ 36 | $ 62 | $ 40 | ||
| Expenses and other deductions | |||||
| Other income | 13 | (5) | 6 | ||
| Interest charges and financing costs | 953 | 842 | 840 | ||
| Income before income taxes | 1,601 | 1,527 | 1,467 | ||
| Income tax benefit | (135) | (70) | (6) | ||
| Net income | 1,736 | 1,597 | 1,473 | ||
| Other Comprehensive Income (Loss), Net of Tax [Abstract] | |||||
| Pension and retiree medical benefits, tax expense(benefit) | 1 | 1 | 1 | ||
| Derivative instruments, tax expense(benefit) | 3 | (1) | (7) | ||
| Total comprehensive income | $ 1,766 | $ 1,615 | $ 1,473 | ||
| Weighted average common shares outstanding: | |||||
| Basic | 547 | 539 | 527 | ||
| Diluted | [1] | 547 | 540 | 528 | |
| Earnings per average common share: | |||||
| Basic | $ 3.18 | $ 2.96 | $ 2.79 | ||
| Diluted | $ 3.17 | $ 2.96 | $ 2.79 | ||
| Xcel Energy Inc. | |||||
| Income | |||||
| Income (Loss) from Equity Method Investments | $ 1,905 | $ 1,744 | $ 1,646 | ||
| Total income | 1,905 | 1,744 | 1,646 | ||
| Expenses and other deductions | |||||
| Operating expenses | 19 | 21 | 43 | ||
| Other income | 2 | (3) | 4 | ||
| Interest charges and financing costs | 206 | 173 | 198 | ||
| Total expenses and other deductions | 223 | 197 | 237 | ||
| Income before income taxes | 1,682 | 1,547 | 1,409 | ||
| Income tax benefit | (54) | (50) | (64) | ||
| Net income | 1,736 | 1,597 | 1,473 | ||
| Other Comprehensive Income (Loss), Net of Tax [Abstract] | |||||
| Net pension and retiree medical gains (losses) arising during the period, net of tax of $1, $— and $(2), respectively | 9 | 8 | 5 | ||
| Other Comprehensive Income (Loss), Unrealized Gain (Loss) on Derivatives Arising During Period, before Tax | 21 | 10 | (5) | ||
| Other Comprehensive Income (Loss), Net of Tax | 30 | 18 | 0 | ||
| Total comprehensive income | $ 1,766 | $ 1,615 | $ 1,473 | ||
| |||||
Condensed Statement of Cash Flows (Details) - USD ($) $ in Millions |
12 Months Ended | ||
|---|---|---|---|
Dec. 31, 2022 |
Dec. 31, 2021 |
Dec. 31, 2020 |
|
| Operating activities | |||
| Net cash provided by (used in) operating activities | $ 3,932 | $ 2,189 | $ 2,848 |
| Investing activities | |||
| Net (investments) return in the utility money pool | 0 | (57) | (18) |
| Other, net | (122) | (140) | (164) |
| Net cash provided by (used in) investing activities | (4,653) | (4,287) | (4,740) |
| Financing activities | |||
| Proceeds from (repayment of) short-term borrowings, net | (192) | 421 | (11) |
| Proceeds from Issuance of Long-term Debt | 2,164 | 2,710 | 2,940 |
| Repayment of long-term debt | (601) | (417) | (1,001) |
| Proceeds from Issuance of Common Stock | 322 | 366 | 727 |
| Payments of Dividends | (1,012) | (935) | (856) |
| Proceeds from (Payments for) Other Financing Activities | (15) | (10) | (26) |
| Net cash provided by (used in) financing activities | 666 | 2,135 | 1,773 |
| Net change in cash and cash equivalents | (55) | 37 | (119) |
| Cash and Cash Equivalents, at Carrying Value, Beginning Balance | 166 | 129 | 248 |
| Cash and Cash Equivalents, at Carrying Value, Ending Balance | 111 | 166 | 129 |
| Xcel Energy Inc. | |||
| Operating activities | |||
| Net cash provided by (used in) operating activities | 1,340 | 1,147 | 2,377 |
| Investing activities | |||
| Capital contributions to subsidiaries | 921 | 1,661 | 2,553 |
| Other, net | 0 | 0 | (1) |
| Net cash provided by (used in) investing activities | (921) | (1,604) | (2,572) |
| Financing activities | |||
| Proceeds from (repayment of) short-term borrowings, net | (407) | 638 | (500) |
| Proceeds from Issuance of Long-term Debt | 694 | 791 | 1,089 |
| Repayment of long-term debt | 0 | 400 | 300 |
| Proceeds from Issuance of Common Stock | 322 | 366 | 727 |
| Repurchases of common stock | 0 | 0 | 4 |
| Payments of Dividends | 1,012 | 935 | 856 |
| Proceeds from (Payments for) Other Financing Activities | (16) | (16) | (17) |
| Net cash provided by (used in) financing activities | (419) | 444 | 139 |
| Net change in cash and cash equivalents | 0 | (13) | (56) |
| Cash and Cash Equivalents, at Carrying Value, Beginning Balance | 1 | 14 | 70 |
| Cash and Cash Equivalents, at Carrying Value, Ending Balance | $ 1 | $ 1 | $ 14 |
Condensed Balance Sheet (Details) - USD ($) $ in Millions |
Dec. 31, 2022 |
Dec. 31, 2021 |
|---|---|---|
| Assets | ||
| Derivative instruments | $ 279 | $ 123 |
| Total current assets | 5,144 | 4,239 |
| Investment in subsidiaries | 219 | 208 |
| Other assets | 389 | 431 |
| Total other assets | 7,791 | 8,155 |
| Total assets | 61,188 | 57,851 |
| Liabilities and Equity | ||
| Dividends payable | 268 | 249 |
| Short-term debt | 813 | 1,005 |
| Other current liabilities | 545 | 459 |
| Total current liabilities | 6,078 | 5,046 |
| Other liabilities | 147 | 158 |
| Total deferred credits and other liabilities | 15,622 | 15,414 |
| Capitalization | ||
| Total common stockholders’ equity | 16,675 | 15,612 |
| Total liabilities and equity | 61,188 | 57,851 |
| Xcel Energy Inc. | ||
| Assets | ||
| Cash and cash equivalents | 1 | 1 |
| Accounts receivable from subsidiaries | 443 | 430 |
| Derivative instruments | 1 | 0 |
| Other current assets | 7 | 6 |
| Total current assets | 452 | 437 |
| Investment in subsidiaries | 22,597 | 21,167 |
| Other assets | (7) | 71 |
| Total other assets | 22,590 | 21,238 |
| Total assets | 23,042 | 21,675 |
| Liabilities and Equity | ||
| Long-term Debt, Current Maturities | 500 | 0 |
| Dividends payable | 268 | 249 |
| Short-term debt | 231 | 638 |
| Other current liabilities | 17 | 29 |
| Total current liabilities | 1,016 | 916 |
| Other liabilities | 13 | 10 |
| Total deferred credits and other liabilities | 13 | 10 |
| Capitalization | ||
| Long-term debt, noncurrent | 5,338 | 5,137 |
| Total common stockholders’ equity | 16,675 | 15,612 |
| Total capitalization | 22,013 | 20,749 |
| Total liabilities and equity | $ 23,042 | $ 21,675 |
Condensed Notes to the Financial Statements (Details) - USD ($) $ in Millions |
3 Months Ended | 12 Months Ended | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Dec. 31, 2022 |
Dec. 31, 2022 |
Dec. 31, 2021 |
Dec. 31, 2020 |
|||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Money Pool [Abstract] | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Schedule of Guarantor Obligations | Guarantees and bond indemnities issued and outstanding as of Dec. 31, 2022:
(a)The guarantee expires the earlier of 2024 or full repayment of the loan. (b)Nonperformance and/or nonpayment. (c)The guarantee expires the earlier of termination or payment of all obligations under the purchase contract. (d)Given that the manufacturing of solar generating equipment has not yet commenced, related exposure to the payment obligations of Capital Services at Dec. 31, 2022 is immaterial. (e)The surety bonds primarily relate to workers compensation benefits and utility projects. The workers compensation bonds are renewed annually and the project based bonds expire in conjunction with the completion of the related projects. (f)Due to the magnitude of projects associated with the surety bonds, the total current exposure of this indemnification cannot be determined. Xcel Energy Inc. believes the exposure to be significantly less than the total amount of the outstanding bonds. (g)Per the indemnity agreement between Xcel Energy Inc. and the various surety companies, surety companies have the discretion to demand that collateral be posted.
|
|||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Guarantor Obligations [Line Items] | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Guarantees issued and outstanding | $ 62 | $ 62 | $ 60 | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Guarantor Obligations, Maximum Exposure, Undiscounted | 62 | 62 | 60 | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Payment or Performance Guarantee | Loan for Hiawatha Collegiate High School [Member] | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Guarantor Obligations [Line Items] | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Guarantees issued and outstanding | [1] | 1 | 1 | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Current exposure under these guarantees | [2] | 0 | 0 | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Guarantor Obligations, Maximum Exposure, Undiscounted | [1] | 1 | 1 | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Payment or Performance Guarantee | Guarantee of Capital Services purchase contract for solar generating equipment | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Guarantor Obligations [Line Items] | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Guarantees issued and outstanding | [2],[3],[4] | 98 | 98 | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Guarantor Obligations, Maximum Exposure, Undiscounted | [2],[3],[4] | 98 | 98 | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Payment or Performance Guarantee | Surety Bonds | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Guarantor Obligations [Line Items] | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Guarantees issued and outstanding | [5],[6],[7] | 61 | 61 | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Guarantor Obligations, Maximum Exposure, Undiscounted | [5],[6],[7] | 61 | 61 | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Xcel Energy Inc. | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Accounts Receivable and Payable with Affiliates [Abstract] | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Accounts Receivable | 443 | 443 | 430 | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Dividends [Abstract] | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Cash dividends paid to Xcel Energy by subsidiaries | 1,503 | 1,344 | $ 2,527 | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Money Pool [Abstract] | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Loan outstanding at period end | 0 | 0 | 0 | 57 | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Average loan outstanding | 1 | 10 | 16 | 104 | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Maximum loan outstanding | $ 50 | $ 204 | $ 439 | $ 350 | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Weighted average interest rate, computed on a daily basis (percentage) | 0.01% | 0.73% | 0.08% | 0.60% | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Weighted average interest rate at period end (percentage) | 0.07% | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Money pool interest income | $ 0 | $ 0 | $ 0 | $ 1 | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Xcel Energy Inc. | NSP Minnesota | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Accounts Receivable and Payable with Affiliates [Abstract] | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Accounts Receivable | 82 | 82 | 104 | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Xcel Energy Inc. | NSP-Wisconsin | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Accounts Receivable and Payable with Affiliates [Abstract] | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Accounts Receivable | 17 | 17 | 25 | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Xcel Energy Inc. | PSCo | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Accounts Receivable and Payable with Affiliates [Abstract] | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Accounts Receivable | 111 | 111 | 91 | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Xcel Energy Inc. | SPS | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Accounts Receivable and Payable with Affiliates [Abstract] | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Accounts Receivable | 61 | 61 | 58 | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Xcel Energy Inc. | Xcel Energy Services Inc. | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Accounts Receivable and Payable with Affiliates [Abstract] | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Accounts Receivable | 145 | 145 | 125 | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Xcel Energy Inc. | Other Subsidiaries | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Accounts Receivable and Payable with Affiliates [Abstract] | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Accounts Receivable | $ 27 | $ 27 | $ 27 | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Schedule II (Details) - USD ($) $ in Millions |
12 Months Ended | |||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Dec. 31, 2022 |
Dec. 31, 2021 |
Dec. 31, 2020 |
||||||||||||
| Allowance for Bad Debts | ||||||||||||||
| SEC Schedule, 12-09, Movement in Valuation Allowances and Reserves [Roll Forward] | ||||||||||||||
| Balance at Jan. 1 | $ 106 | $ 79 | $ 55 | |||||||||||
| Charged to costs and expenses | 73 | 60 | 60 | |||||||||||
| Charged to other accounts | [1] | 26 | 14 | 12 | ||||||||||
| Deductions from reserves | [2] | 83 | 47 | 48 | ||||||||||
| Balance at Dec. 31 | 122 | 106 | 79 | |||||||||||
| NOL and Tax Credit Valuation Allowances | ||||||||||||||
| SEC Schedule, 12-09, Movement in Valuation Allowances and Reserves [Roll Forward] | ||||||||||||||
| Balance at Jan. 1 | 64 | 64 | 67 | |||||||||||
| Charged to costs and expenses | 6 | 5 | 6 | |||||||||||
| Charged to other accounts | 0 | 0 | 0 | |||||||||||
| Deductions from reserves | 8 | [3] | 5 | [3] | 9 | [4] | ||||||||
| Balance at Dec. 31 | $ 62 | $ 64 | $ 64 | |||||||||||
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