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Benefit Plans
 3 Months Ended
Mar. 31, 2024
Retirement Benefits [Abstract]  
Benefit Plans Benefit Plans
The Company has several non-contributory defined benefit plans and postretirement benefit plans covering eligible employees and retirees.
The following table presents the components of net periodic (benefit) cost for the defined benefit plans:

Pension Benefits
Other Postretirement Benefits
Three Months Ended March 312024202320242023
(In millions)
 
Service cost$1 $1 
Interest cost24 28 $1 $1 
Expected return on plan assets(29)(32)(1)(1)
Amortization of unrecognized net loss7 9 
Net periodic cost$3 $6 $— $—