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Taxes - (Loss) before taxes (Details) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2022
Dec. 31, 2021
Dec. 31, 2020
Disclosure of temporary difference, unused tax losses and unused tax credits [line items]      
Total income/(loss) before taxes $ 463 $ 418 $ (635)
Country of domicile      
Disclosure of temporary difference, unused tax losses and unused tax credits [line items]      
Total income/(loss) before taxes 234 680 (585)
Foreign countries      
Disclosure of temporary difference, unused tax losses and unused tax credits [line items]      
Total income/(loss) before taxes $ 229 $ (262) $ (50)