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ASSET RETIREMENT OBLIGATIONS (Details) - USD ($)
$ in Millions
9 Months Ended
Sep. 30, 2024
Sep. 30, 2023
Asset Retirement Obligation Disclosure [Abstract]    
Balance at January 1 $ 374.2 $ 479.3
Accretion 13.0 12.8
Additions 165.9 16.6
Liabilities settled (5.2) (3.2)
Balance at September 30 $ 547.9 $ 505.5