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Pension And Other Postretirement Benefits (Tables)
3 Months Ended
Mar. 31, 2023
Pension and Other Postretirement Benefits Cost (Reversal of Cost) [Abstract]  
Components Of The Plans' Net Periodic Benefits Cost
The following table provides the components of the plans' actuarially determined net periodic benefit cost for the three months ended March 31, 2023 and 2022:
Pension BenefitsOPEB
Three Months Ended March 31, (in millions)
2023202220232022
Components of Net Periodic Benefit (Income) Cost(1)
Service cost$5.1 $7.1 $1.3 $1.6 
Interest cost17.1 9.4 5.4 3.0 
Expected return on assets(23.6)(22.9)(3.8)(4.0)
Amortization of prior service credit — (0.5)(0.6)
Recognized actuarial loss8.4 4.5 0.8 0.7 
Total Net Periodic Benefit (Income) Cost $7.0 $(1.9)$3.2 $0.7 
(1)The service cost component and all non-service cost components of net periodic benefit (income) cost are presented in "Operation and maintenance" and "Other, net," respectively, on the Condensed Statements of Consolidated Income (unaudited).