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Benefit Plans (Tables)
 3 Months Ended
Mar. 31, 2026
Retirement Benefits [Abstract]  
Schedule of 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 312026202520262025
(In millions)
Service cost$1 
Interest cost$11 11 $1 $1 
Expected return on plan assets(14)(15)(1)(1)
Amortization of unrecognized net loss2 2 
Net periodic benefit$(1)$(1)$— $—