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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
Dec. 31, 2023
Dec. 31, 2022
Disclosure of interest bearing financial instruments [line items]    
Carrying amount $ (73,449) $ (75,769)
Fair value (75,135) (73,008)
US Dollar [member]    
Disclosure of interest bearing financial instruments [line items]    
Carrying amount (49,917) (52,993)
Fair value (52,268) (52,158)
Euro [member]    
Disclosure of interest bearing financial instruments [line items]    
Carrying amount (20,379) (19,655)
Fair value (19,796) (17,926)
Pound Sterling [member]    
Disclosure of interest bearing financial instruments [line items]    
Carrying amount (2,069) (2,148)
Fair value (2,012) (2,039)
Canadian Dollar [member]    
Disclosure of interest bearing financial instruments [line items]    
Carrying amount (526) (515)
Fair value (505) (437)
Other currency [member]    
Disclosure of interest bearing financial instruments [line items]    
Carrying amount (558) (458)
Fair value $ (554) $ (448)