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Derivative instruments - Effect of Derivative Contracts Not Designated as Hedging Instruments on Income Statement (Details) - USD ($)
$ in Millions
3 Months Ended
Mar. 31, 2023
Mar. 31, 2022
Derivative Instruments and Hedging Activities Disclosure [Abstract]    
Foreign exchange contracts not designated as hedging instruments recognized in Foreign currency losses, net $ (6) $ (5)
Currency swap contracts not designated as hedging instruments recognized in Foreign currency losses, net 0 (32)
Interest rate contracts not designated as hedging instruments recognized in Interest expense and other financial losses $ 2 $ 0