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ASSET RETIREMENT OBLIGATIONS - Asset Retirement Obligations Operating Costs (Details) - USD ($)
$ in Millions
3 Months Ended
Mar. 31, 2024
Mar. 31, 2023
Asset Retirement Obligation Disclosure [Abstract]    
Accretion $ 3.5 $ 3.4
Depreciation 2.4 2.2
Total $ 5.9 $ 5.6