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Risks Arising from Financial Instruments - Analysis of Financial Instruments (Detail) - USD ($)
$ in Millions
Dec. 31, 2024
Dec. 31, 2023
Disclosure of detailed information about financial instruments [line items]    
Financial Assets $ 17,092 $ 16,642
Financial Liabilities 98,379 105,662
Quoted (unadjusted) prices- level 1 [member]    
Disclosure of detailed information about financial instruments [line items]    
Financial Assets 27 28
Financial Liabilities 29 18
Quoted (unadjusted) prices- level 1 [member] | Derivative liabilities [member] | Cash flow hedges [member]    
Disclosure of detailed information about financial instruments [line items]    
Financial Liabilities 29 18
Quoted (unadjusted) prices- level 1 [member] | Derivatives [member] | Cash flow hedges [member]    
Disclosure of detailed information about financial instruments [line items]    
Financial Assets 27 28
Observable market inputs - level 2 [member]    
Disclosure of detailed information about financial instruments [line items]    
Financial Assets 796 530
Financial Liabilities 5,857 5,451
Observable market inputs - level 2 [member] | Derivative liabilities [member]    
Disclosure of detailed information about financial instruments [line items]    
Financial Liabilities 5,644 4,736
Observable market inputs - level 2 [member] | Derivative liabilities [member] | Cash flow hedges [member]    
Disclosure of detailed information about financial instruments [line items]    
Financial Liabilities 105 524
Observable market inputs - level 2 [member] | Derivative liabilities [member] | Fair value hedges [member]    
Disclosure of detailed information about financial instruments [line items]    
Financial Liabilities 94 10
Observable market inputs - level 2 [member] | Derivative liabilities [member] | Net investment hedges [member]    
Disclosure of detailed information about financial instruments [line items]    
Financial Liabilities 14 181
Observable market inputs - level 2 [member] | Non derivative financial assets [member] | Held for trading (non-derivatives) [member]    
Disclosure of detailed information about financial instruments [line items]    
Financial Assets 9 9
Observable market inputs - level 2 [member] | Derivatives [member] | Financial assets at fair value through profit or loss, category [member]    
Disclosure of detailed information about financial instruments [line items]    
Financial Assets 26 51
Observable market inputs - level 2 [member] | Derivatives [member] | Cash flow hedges [member]    
Disclosure of detailed information about financial instruments [line items]    
Financial Assets 416 381
Observable market inputs - level 2 [member] | Derivatives [member] | Net investment hedges [member]    
Disclosure of detailed information about financial instruments [line items]    
Financial Assets 345 89
Unobservable market inputs - level 3 [member]    
Disclosure of detailed information about financial instruments [line items]    
Financial Liabilities 288 741
Unobservable market inputs - level 3 [member] | Derivative liabilities [member] | Deferred consideration on acquisitions [member]    
Disclosure of detailed information about financial instruments [line items]    
Financial Liabilities $ 288 $ 741