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Benefit Plans and Other Postretirement Benefits
 3 Months Ended
Mar. 31, 2024
Retirement Benefits [Abstract]  
Benefit Plans and Other Postretirement Benefits
Components of Net Periodic Benefit Cost (Credit)
Three Months Ended March 31
2024202320242023
(Millions of Dollars)Pension BenefitsPostretirement 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 cost12 11 2 2 
Effects of regulation4 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.