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Quarterly report pursuant to Section 13 or 15(d)

PENSIONS AND OTHER POSTRETIREMENT BENEFITS

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PENSIONS AND OTHER POSTRETIREMENT BENEFITS
 3 Months Ended
Mar. 31, 2024
Postemployment Benefits [Abstract] Ìý
PENSIONS AND OTHER POSTRETIREMENT BENEFITS
NOTE 8 - PENSIONS AND OTHER POSTRETIREMENT BENEFITS
We offer defined benefit pension plans, defined contribution pension plans and OPEB plans to a significant portion of our employees and retirees. Benefits are also provided through multiemployer plans for certain union members.
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.
Based on funding requirements, we made nominal defined benefit pension contributions for both the three months ended MarchÌý31, 2024 and 2023. Based on funding requirements, we made no contributions to our voluntary employee benefit association trust plans for both the three months ended MarchÌý31, 2024 and 2023.