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Financial instruments - Additional information (Details)
$ in Millions
 6 Months Ended
Jun. 30, 2022
USD ($)
Jun. 30, 2021
USD ($)
Dec. 31, 2021
USD ($)
Disclosure of detailed information about borrowings [line items]      
Contingent amount $ 395    
Unsettled derivative positions - assets (liabilities), net 6   $ (4)
Gains on change in fair value of derivatives 7   3
Losses on change in fair value of derivatives $ 1   $ 7
Minimum      
Disclosure of detailed information about borrowings [line items]      
Probability of success, contingent consideration 0.55    
Maximum      
Disclosure of detailed information about borrowings [line items]      
Probability of success, contingent consideration 0.57    
Level 3 | Contingent consideration liabilities      
Disclosure of detailed information about borrowings [line items]      
Adjustments for changes in assumptions $ 7 $ 0  
Payments $ 0 $ 15