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Share repurchase program (Details) - USD ($)
$ in Millions
3 Months Ended 9 Months Ended
Sep. 30, 2023
Sep. 30, 2022
Sep. 30, 2023
Sep. 30, 2022
Feb. 21, 2023
Equity, Class of Treasury Stock [Line Items]          
Shares acquired (in shares) 425,913   425,913    
Foreign currency loss     $ 498 $ 265  
February 2023 Stock Repurchase Program          
Equity, Class of Treasury Stock [Line Items]          
Aggregate consideration amount of repurchase program $ 157   $ 157   $ 900
Share Repurchase Programs          
Equity, Class of Treasury Stock [Line Items]          
Shares acquired (in shares) 570,049   570,049    
August 30, 2020 Board Authorized Repurchase Program          
Equity, Class of Treasury Stock [Line Items]          
Foreign currency loss $ 173 $ 45 $ 386 $ 108