v3.26.1
Lease liabilities - Summary of lease liabilities and discount rates (Detail) - USD ($)
$ in Millions
Dec. 31, 2025
Dec. 31, 2024
Dec. 31, 2023
Dec. 31, 2022
Disclosure of quantitative information about lease liabilities [line Items]        
Lease liabilities $ 571 $ 776 $ 666 $ 566
0 to 1 year [member]        
Disclosure of quantitative information about lease liabilities [line Items]        
Lease liabilities $ 71 $ 53 $ 87  
Effective average monthly rate used 0.86% 1.15% 1.55%  
1 to 2 years [member]        
Disclosure of quantitative information about lease liabilities [line Items]        
Lease liabilities $ 161 $ 248 $ 142  
Effective average monthly rate used 0.76% 0.89% 1.17%  
2 to 3 years [member]        
Disclosure of quantitative information about lease liabilities [line Items]        
Lease liabilities $ 179 $ 140 $ 210  
Effective average monthly rate used 0.74% 0.89% 1.02%  
3 to 4 years [member]        
Disclosure of quantitative information about lease liabilities [line Items]        
Lease liabilities $ 43 $ 149 $ 46  
Effective average monthly rate used 0.69% 0.82% 0.97%  
4 to 5 years [member]        
Disclosure of quantitative information about lease liabilities [line Items]        
Lease liabilities $ 28 $ 55 $ 118  
Effective average monthly rate used 0.79% 0.69% 0.90%  
5 to 9 years [member]        
Disclosure of quantitative information about lease liabilities [line Items]        
Lease liabilities $ 80 $ 112 $ 38  
Effective average monthly rate used 0.62% 0.66% 0.81%  
More than 9 years [member]        
Disclosure of quantitative information about lease liabilities [line Items]        
Lease liabilities $ 9 $ 19 $ 25  
Effective average monthly rate used 0.70% 0.73% 0.75%