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Quarterly report pursuant to Section 13 or 15(d)

PENSIONS AND OTHER POSTRETIREMENT BENEFITS (Tables)

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PENSIONS AND OTHER POSTRETIREMENT BENEFITS (Tables)
3 Months Ended
Mar. 31, 2024
Postemployment Benefits [Abstract] Ìý
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) 2024 2023
Service cost $ 7Ìý $ 8Ìý
Interest cost 55Ìý 59Ìý
Expected return on plan assets (80) (79)
Amortization:
Prior service costs 4Ìý 4Ìý
Net actuarial loss —Ìý 1Ìý
Net periodic benefit credits $ (14) $ (7)
OPEB COSTS (CREDITS)
Three Months Ended
March 31,
(In millions) 2024 2023
Service cost $ 2Ìý $ 2Ìý
Interest cost 12Ìý 16Ìý
Expected return on plan assets (11) (11)
Termination benefits1
2Ìý —Ìý
Amortization:
Prior service credits (4) (4)
Net actuarial gain (38) (36)
Net periodic benefit credits $ (37) $ (33)
1 The termination benefits relate to the announcement of the indefinite idle of our Weirton tinplate production plant.