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Benefit Plans and Other Postretirement Benefits | 3 Months Ended
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Mar. 31, 2024
Retirement Benefits [Abstract] |
Benefit Plans and Other Postretirement Benefits | Components of Net Periodic Benefit Cost (Credit)
|  | Three Months Ended March 31
|  | 2024 |  | 2023 |  | 2024 |  | 2023
(Millions of Dollars) |  | Pension Benefits |  | Postretirement Health Care Benefits
Service cost |  | $ | 19 |  |  | $ | 18 |  |  | $ | — |  |  | $ | — |
Interest cost (a) |  | 38 |  |  | 40 |  |  | 5 |  |  | 5 |
Expected return on plan assets (a) |  | (52) |  |  | (52) |  |  | (4) |  |  | (4) |
Amortization of net loss (a) |  | 7 |  |  | 5 |  |  | 1 |  |  | 1 |
Net periodic benefit cost |  | 12 |  |  | 11 |  |  | 2 |  |  | 2 |
Effects of regulation |  | 4 |  |  | 5 |  |  | — |  |  | — |
Net benefit cost recognized for financial reporting |  | $ | 16 |  |  | $ | 16 |  |  | $ | 2 |  |  | $ | 2 |
(a)The components of net periodic cost other than the service cost component are included in the line item “Other income, net” in the consolidated statements of income or capitalized on the consolidated balance sheets as a regulatory asset. In January 2024, contributions totaling $100 million were made across Xcel Energy’s pension plans. Xcel Energy does not expect additional pension contributions during 2024.

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