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ASSET RETIREMENT OBLIGATIONS - Schedule of Reconciliations of Asset Retirement Obligations (Details) - USD ($)
$ in Millions
3 Months Ended
Mar. 31, 2025
Mar. 31, 2024
Asset Retirement Obligation, Roll Forward Analysis [Roll Forward]    
ARO liability balance at beginning of period $ 427.4 $ 324.1
Liabilities incurred 0.0 0.0
Liabilities settled (5.9) (1.8)
Accretion expense 4.3 3.5
Revisions, net 3.7 (0.1)
ARO liability balance at end of period $ 429.5 $ 325.7