v3.26.1
Risks Arising from Financial Instruments - Summary of Carrying Amount of Fixed Rate Interest-Bearing Financial Liabilities and Fair Value (Detail) - Fixed interest rate [member] - USD ($)
$ in Millions
Jun. 30, 2026
Dec. 31, 2025
Disclosure of interest bearing financial instruments [line items]    
Carrying amount $ (69,424) $ (70,296)
Fair value (68,916) (70,343)
US Dollar [member]    
Disclosure of interest bearing financial instruments [line items]    
Carrying amount (41,032) (41,050)
Fair value (41,174) (41,863)
Euro [member]    
Disclosure of interest bearing financial instruments [line items]    
Carrying amount (27,020) (27,854)
Fair value (26,465) (27,187)
Pound Sterling [member]    
Disclosure of interest bearing financial instruments [line items]    
Carrying amount (510) (519)
Fair value (455) (467)
Canadian Dollar [member]    
Disclosure of interest bearing financial instruments [line items]    
Carrying amount (490) (509)
Fair value (453) (465)
Other currency [member]    
Disclosure of interest bearing financial instruments [line items]    
Carrying amount (372) (364)
Fair value $ (369) $ (362)