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PENSIONS AND OTHER POSTRETIREMENT BENEFITS | 9 Months Ended
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Sep. 30, 2025
Postemployment Benefits [Abstract] |
PENSIONS AND OTHER POSTRETIREMENT BENEFITS | NOTE 9 - 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 September 30, |  | Nine Months Ended September 30,
(In millions) | 2025 |  | 2024 |  | 2025 |  | 2024
Service cost | $ | 7 |  |  | $ | 7 |  |  | $ | 21 |  |  | $ | 21 |
Interest cost | 53 |  |  | 54 |  |  | 158 |  |  | 163 |
Expected return on plan assets | (79) |  |  | (80) |  |  | (238) |  |  | (240) |
Amortization: |  |  |  |  |  |  |
Prior service costs | 4 |  |  | 5 |  |  | 13 |  |  | 13 |
Net actuarial gain | (2) |  |  | — |  |  | (6) |  |  | — |
Net periodic benefit credits | $ | (17) |  |  | $ | (14) |  |  | $ | (52) |  |  | $ | (43) |
OPEB COSTS (CREDITS)
| Three Months Ended September 30, |  | Nine Months Ended September 30,
(In millions) | 2025 |  | 2024 |  | 2025 |  | 2024
Service cost | $ | 2 |  |  | $ | 2 |  |  | $ | 6 |  |  | $ | 6 |
Interest cost | 14 |  |  | 13 |  |  | 43 |  |  | 38 |
Expected return on plan assets | (11) |  |  | (11) |  |  | (32) |  |  | (32) |
Termination benefits 1 | — |  |  | — |  |  | 15 |  |  | 2 |
Amortization: |  |  |  |  |  |  |
Prior service credits | (3) |  |  | (4) |  |  | (10) |  |  | (12) |
Net actuarial gain | (33) |  |  | (39) |  |  | (100) |  |  | (116) |
Net periodic benefit credits | $ | (31) |  |  | $ | (39) |  |  | $ | (78) |  |  | $ | (114) |
1 The termination benefits relate to the decision to indefinitely idle our Conshohocken, Riverdale and Steelton facilities in the second quarter of 2025 and the indefinite idle of our Weirton tinplate production facility in the first quarter of 2024.
Based on funding requirements, we made $22 million and $51 million of defined benefit pension contributions for the three and nine months ended September 30, 2025, respectively. Based on funding requirements, we made $75 million and $91 million of defined benefit pension contributions for the three and nine months ended September 30, 2024, respectively. Based on funding requirements, we made no contributions to our voluntary employee benefit association trust plans for any of the three and nine months ended September 30, 2025 and 2024.

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