v3.22.4
Share-based compensation - Restricted share unit plan (Details)
$ in Millions
12 Months Ended
Dec. 31, 2022
USD ($)
yr
shares
installment
Dec. 31, 2021
yr
shares
Dec. 31, 2020
USD ($)
shares
share-based compensation      
Number of vesting installments | installment 4    
Vesting period | yr   6.5  
Liabilities from share-based payment transactions | $ $ 0   $ 22
Restricted Stock Units      
share-based compensation      
Number of other equity instruments outstanding in share-based payment arrangement 1,218,796 1,083,542  
Performance Share Units      
share-based compensation      
Vesting period | yr 3    
Number of other equity instruments outstanding in share-based payment arrangement 387,025 192,064  
Phantom restricted share units      
share-based compensation      
Number of other equity instruments outstanding in share-based payment arrangement     285,386
Phantom Performance Share Units      
share-based compensation      
Number of other equity instruments outstanding in share-based payment arrangement     289,815
Common Share | Restricted Stock Units      
share-based compensation      
Nominal value (in number of equity shares) 1    
Common Share | Phantom restricted share units      
share-based compensation      
Nominal value (in number of equity shares) 1