v3.25.2
Benefit Plans
 6 Months Ended
Jun. 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 EndedSix Months Ended
June 30,June 30,
2025202420252024
(In millions)
Service cost$1 $1 
Interest cost$11 $25 22 49 
Expected return on plan assets(15)(30)(30)(59)
Amortization of unrecognized net loss2 8 4 15 
Settlements1 1 
Net periodic (benefit) cost$(1)$3 $(2)$6 

Other Postretirement Benefits
Three Months EndedSix Months Ended
June 30,June 30,
2025202420252024
(In millions)
Interest cost$1 $1 
Expected return on plan assets(1)(1)
Net periodic benefit$— $— $— $—