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Property, Plant and Equipment - Asset Retirement Obligations (Details) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2023
Dec. 31, 2022
Asset Retirement Obligation, Roll Forward Analysis [Roll Forward]    
Balance at beginning of period $ 85 $ 121
Accretion expense 4 5
Liabilities settled (6) (7)
Change in estimate 11 (4)
Classified as held for sale 0 (30)
Balance at end of period $ 94 $ 85