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NATURE OF BUSINESS, SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES AND OTHER - Asset Retirement Obligations (Details) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2024
Dec. 31, 2023
Asset Retirement Obligations Roll forward    
Beginning balance $ 521 $ 491
Liabilities assumed in the Aera Merger 646 0
Liabilities settled and divested (94) (60)
Accretion expense 84 46
Revisions of estimated cash flows (32) 37
Additions 4 7
Ending balance 1,129 521
Current liability (included in accrued liabilities) 134 99
Non-current liability 995 422
Asset retirement obligation, accretion expense, measurement period adjustments $ 3  
Asset retirement obligations associated with assets held for sale   $ 5