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Projected Benefit Payments (Details) - USD ($) | 1 Months Ended | 12 Months Ended
--- | --- | ---
Jan. 31, 2024 | Dec. 31, 2024 | Dec. 31, 2023 | Dec. 31, 2022 | Dec. 31, 2021
Defined Benefit Plan, Net Projected Benefit Payments [Abstract] |  |  |  |  |
plan ammendment |  |  | $ 0 |  |
Pension Plan [Member] |  |  |  |  |
Defined Benefit Plan, Gross Projected Benefit Payments [Abstract] |  |  |  |  |
2024 |  |  | 398,000,000 |  |
2025 |  |  | 214,000,000 |  |
2026 |  |  | 217,000,000 |  |
2027 |  |  | 223,000,000 |  |
2028 |  |  | 226,000,000 |  |
2029 - 2033 |  |  | $ 1,131,000,000 |  |
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) |  |  | 31.00% | 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% | 38.00% |
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% | 9.00% |
Pension Plan [Member] | Alternative investments |  |  |  |  |
Defined Benefit Plan, Net Projected Benefit Payments [Abstract] |  |  |  |  |
Target pension asset allocations (as a percent) |  |  | 20.00% | 18.00% |
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 | $ 50,000,000 | $ 131,000,000
Pension Plan [Member] | Xcel Energy [Member] | Subsequent Event |  |  |  |  |
Defined Benefit Plan, Net Projected Benefit Payments [Abstract] |  |  |  |  |
Payment for Pension Benefits | $ 100,000,000 |  |  |  |
Other Postretirement Benefits Plan [Member] |  |  |  |  |
Defined Benefit Plan, Gross Projected Benefit Payments [Abstract] |  |  |  |  |
2024 |  |  | 42,000,000 |  |
2025 |  |  | 40,000,000 |  |
2026 |  |  | 39,000,000 |  |
2027 |  |  | 37,000,000 |  |
2028 |  |  | 36,000,000 |  |
2029 - 2033 |  |  | 161,000,000 |  |
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 |  |
2025 |  |  | 38,000,000 |  |
2026 |  |  | 37,000,000 |  |
2027 |  |  | 35,000,000 |  |
2028 |  |  | 34,000,000 |  |
2029 - 2033 |  |  | $ 149,000,000 |  |
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) |  |  | 9.00% | 16.00% |
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) |  |  | 77.00% | 71.00% |
Other Postretirement Benefits Plan [Member] | Alternative investments |  |  |  |  |
Defined Benefit Plan, Net Projected Benefit Payments [Abstract] |  |  |  |  |
Target pension asset allocations (as a percent) |  |  | 13.00% | 12.00% |
Other Postretirement Benefits Plan [Member] | Cash equivalents |  |  |  |  |
Defined Benefit Plan, Net Projected Benefit Payments [Abstract] |  |  |  |  |
Target pension asset allocations (as a percent) |  |  | 1.00% | 1.00% |
Defined Benefit Plan, Overfunded Plan [Member] | Xcel Energy [Member] |  |  |  |  |
Defined Benefit Plan, Net Projected Benefit Payments [Abstract] |  |  |  |  |
Payment for Pension Benefits |  |  | $ 11,000,000 | $ 13,000,000 | $ 15,000,000
Defined Benefit Plan, Overfunded Plan [Member] | Xcel Energy [Member] | Subsequent Event |  |  |  |  |
Defined Benefit Plan, Net Projected Benefit Payments [Abstract] |  |  |  |  |
Payment for Pension Benefits |  | $ 11,000,000 |  |  |

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- Definition The amount of the benefits expected to be paid, net of the prescription drug subsidy receipts expected to be received in the five fiscal years thereafter (the aggregate net amount of benefits expected to be paid in years 6 through 10 after the date of the latest statement of financial position). + References No definition available. + Details
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