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PENSION AND OTHER POSTRETIREMENT BENEFIT PLANS - Narrative (Details) - USD ($) | 9 Months Ended
--- | ---
Sep. 30, 2025 | Sep. 30, 2024
Pension |  |
Pension and Other Postretirement Benefit Plans [Line Items] |  |
Employer contributions | $ 19,100,000 | $ 25,000,000
Expected future employer contributions | 0 |
Other Postretirement |  |
Pension and Other Postretirement Benefit Plans [Line Items] |  |
Employer contributions | 0 | $ 0
Expected future employer contributions | $ 0 |

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