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PENSION, HEALTH CARE AND OTHER POSTRETIREMENT BENEFITS - Summary of the Obligation and the Assumptions Used for Postretirement Benefits Other than Pensions (Details) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2025 | Dec. 31, 2024 | Dec. 31, 2023
Liabilities recognized in the Consolidated Balance Sheets: |  |  |
Other accruals | $ (1,508.9) | $ (1,360.2) | $ (1,329.5)
Postretirement benefits other than pensions | (129.8) | (120.7) | (133.2)
Other Postretirement Benefits | Domestic |  |  |
Benefit obligation: |  |  |
Balances at beginning of year | 135.1 | 147.2 | 153.8
Service cost | 0.2 | 0.5 | 0.6
Interest cost | 6.7 | 6.8 | 7.4
Actuarial gains | (2.3) | (8.6) | (8.0)
Benefits paid | (14.1) | (10.8) | (6.6)
Balances at end of year | 125.6 | 135.1 | 147.2
Liabilities recognized in the Consolidated Balance Sheets: |  |  |
Other accruals | (14.1) | (14.4) | (14.0)
Postretirement benefits other than pensions | (111.5) | (120.7) | (133.2)
Total liabilities recognized | (125.6) | (135.1) | (147.2)
Amounts recognized in AOCI: |  |  |
Net actuarial gains | 20.9 | 21.0 | 12.9
Prior service credits | 1.9 | 16.2 | 40.0
Total amounts recognized | $ 22.8 | $ 37.2 | $ 52.9
Weighted-average assumptions used to determine benefit obligations: |  |  |
Discount rate | 5.35% | 5.61% | 4.97%
Health care cost trend rate - pre-65 | 7.00% | 7.50% | 7.00%
Health care cost trend rate - post-65 | 6.00% | 6.50% | 6.00%
Prescription drug cost increases | 11.00% | 11.75% | 9.00%
Weighted-average assumptions used to determine net benefit cost: |  |  |
Discount rate | 5.61% | 4.97% | 5.16%
Health care cost trend rate - pre-65 | 7.50% | 7.00% | 6.25%
Health care cost trend rate - post-65 | 6.50% | 6.00% | 5.50%
Prescription drug cost increases | 11.75% | 9.00% | 8.25%

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