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ENVIRONMENTAL (Details) - USD ($) $ in Millions | 3 Months Ended | 6 Months Ended |
--- | --- | --- | ---
Jun. 30, 2026 | Jun. 30, 2025 | Jun. 30, 2026 | Jun. 30, 2025 | Dec. 31, 2025
Environmental Remediation Obligations [Abstract] |  |  |  |  |
Reserves for future environmental expenditures - total | $ 158.5 | $ 155.2 | $ 158.5 | $ 155.2 | $ 156.3
Reserves for future environmental expenditures - noncurrent | 128.5 | 125.2 | 128.5 | 125.2 | 126.3
Environmental Remediation Expense | 5.7 | 4.8 | 10.9 | 9.8 |
Accrued Environmental Loss Contingencies, Current | $ 30.0 | $ 30.0 | $ 30.0 | $ 30.0 | $ 30.0

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