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ASSET RETIREMENT OBLIGATIONS - Asset Retirement Obligations Operating Costs (Details) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2024
Dec. 31, 2023
Dec. 31, 2022
Asset Retirement Obligation Disclosure [Abstract]      
Accretion $ 14.7 $ 13.9 $ 14.1
Depreciation 12.5 9.0 9.4
Total ARO operating costs $ 27.2 $ 22.9 $ 23.5