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Asset Retirement Obligations (Details)
$ in Millions
9 Months Ended
Sep. 30, 2024
USD ($)
Asset Retirement Obligation Disclosure [Abstract]  
Balance at beginning of year $ 556
Additional liabilities accrued 24
Revisions in estimated cash outflows 9
Disposition of assets (7)
Accretion expense 22
Balance at end of year $ 604