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Commitments and Contingencies - Asset Retirement Obligations (Details) - USD ($)
$ in Millions
6 Months Ended 12 Months Ended
Jun. 30, 2023
Dec. 31, 2022
Asset Retirement Obligation, Roll Forward Analysis [Roll Forward]    
Balance at beginning of period $ 230 $ 220
Liabilities incurred in the current period 0 20
Liabilities settled in the current period (8) (10)
Accretion of liability 10 16
Revisions in estimated cash flows 7 0
Effect of foreign currency exchange rate changes (10) (16)
Balance at end of period 229 230
Less: Current portion of asset retirement obligations (2) (2)
Total non-current portion of asset retirement obligations $ 227 $ 228