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ENVIRONMENTAL (Details) - USD ($)
$ in Millions
3 Months Ended 6 Months Ended
Jun. 30, 2024
Jun. 30, 2023
Jun. 30, 2024
Jun. 30, 2023
Dec. 31, 2023
Environmental Remediation Obligations [Abstract]          
Reserves for future environmental expenditures - total $ 155.3 $ 151.8 $ 155.3 $ 151.8 $ 153.6
Reserves for future environmental expenditures - noncurrent 123.3 126.8 123.3 126.8 $ 121.6
Environmental Remediation Expense $ 6.4 $ 13.0 $ 12.2 $ 16.2