Quarterly report [Sections 13 or 15(d)]

PENSIONS AND OTHER POSTRETIREMENT BENEFITS (Tables)

v3.25.1
PENSIONS AND OTHER POSTRETIREMENT BENEFITS (Tables)
 3 Months Ended
Mar. 31, 2025
Postemployment Benefits [Abstract]  
Schedule of Net Benefit Costs
The following are the components of defined benefit pension and OPEB costs (credits):
DEFINED BENEFIT PENSION COSTS (CREDITS)
Three Months Ended
March 31,
(In millions) 2025 2024
Service cost $ 7  $ 7 
Interest cost 53  55 
Expected return on plan assets (79) (80)
Amortization:
Prior service costs 4  4 
Net actuarial gain (2) — 
Net periodic benefit credits $ (17) $ (14)
OPEB COSTS (CREDITS)
Three Months Ended
March 31,
(In millions) 2025 2024
Service cost $ 2  $ 2 
Interest cost 14  12 
Expected return on plan assets (11) (11)
Termination benefits1
—  2 
Amortization:
Prior service credits (3) (4)
Net actuarial gain (33) (38)
Net periodic benefit credits $ (31) $ (37)
1 The termination benefits relate to the announcement of the indefinite idle of our Weirton tinplate production plant.