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Benefit Plans
 9 Months Ended
Sep. 30, 2025
Retirement Benefits [Abstract]  
Benefit Plans Benefit Plans
Several non-contributory defined benefit plans and postretirement benefit plans cover eligible employees and retirees.

The following tables present the components of net periodic (benefit) cost for the defined benefit plans:

Pension Benefits
Three Months EndedNine Months Ended
September 30,September 30,
2025202420252024
(In millions)
Service cost$1 $1 $2 
Interest cost$12 23 34 72 
Expected return on plan assets(16)(29)(46)(88)
Amortization of unrecognized net loss2 7 6 22 
Settlements4 1 4 
Net periodic (benefit) cost$(2)$6 $(4)$12 

Other Postretirement Benefits
Three Months EndedNine Months Ended
September 30,September 30,
2025202420252024
(In millions)
Interest cost$1 $1 
Expected return on plan assets$(1)$(1)(2)(2)
Amortization of unrecognized net loss1 1 
Net periodic benefit$(1)$— $(1)$—