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Lease liabilities - Summary of lease liabilities and discount rates (Detail) - USD ($)
$ in Millions
Dec. 31, 2022
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Disclosure of quantitative information about lease liabilities [line Items]        
Lease liabilities $ 566 $ 542 $ 551 $ 1,033
0 to 1 year [member]        
Disclosure of quantitative information about lease liabilities [line Items]        
Lease liabilities $ 39 $ 32 $ 64  
Effective average monthly rate used 1.07% 0.80% 0.93%  
1 to 2 years [member]        
Disclosure of quantitative information about lease liabilities [line Items]        
Lease liabilities $ 198 $ 116 $ 125  
Effective average monthly rate used 1.54% 1.03% 0.76%  
2 to 3 years [member]        
Disclosure of quantitative information about lease liabilities [line Items]        
Lease liabilities $ 144 $ 150 $ 79  
Effective average monthly rate used 1.23% 1.15% 0.79%  
3 to 4 years [member]        
Disclosure of quantitative information about lease liabilities [line Items]        
Lease liabilities $ 81 $ 109 $ 115  
Effective average monthly rate used 1.28% 1.25% 0.87%  
4 to 5 years [member]        
Disclosure of quantitative information about lease liabilities [line Items]        
Lease liabilities $ 43 $ 42 $ 32  
Effective average monthly rate used 0.95% 0.96% 0.92%  
5 to 9 years [member]        
Disclosure of quantitative information about lease liabilities [line Items]        
Lease liabilities $ 45 $ 86 $ 94  
Effective average monthly rate used 0.79% 0.89% 0.92%  
More than 9 years [member]        
Disclosure of quantitative information about lease liabilities [line Items]        
Lease liabilities $ 16 $ 7 $ 42  
Effective average monthly rate used 0.82% 0.80% 0.82%