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Partnerships in E&P activities (Details 2) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2022
Dec. 31, 2021
Partnerships In Ep Activities    
Opening balance $ 364 $ 370
Additions/(Write-offs) on PP&E (7) (64)
Other income and expenses 26 84
Translation adjustment 24 (26)
Closing balance $ 407 $ 364