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Benefit Plans (Tables)
 3 Months Ended
Mar. 31, 2023
Retirement Benefits [Abstract]  
Net Periodic (Benefit) Cost Components
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 312023202220232022
(In millions)    
     
Service cost$1 $1 
Interest cost28 19 $1 
Expected return on plan assets(32)(43)(1)
Amortization of unrecognized net loss9 8 
Settlements1 
Regulatory asset decrease1 
Net periodic (benefit) cost$6 $(13)$— $—