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Derivative Financial Instruments - Summary of Loss/Profit Arising on Fair Value, Cash Flow, Net Investment Hedges and Related Hedged Items Reflected in Income Statement (Detail) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Disclosure of Detailed Information about Hedges [Line Items]      
Fair value of hedge instruments $ (85) $ 97 $ 72
Fair value of the hedged items 87 (83) (71)
Gains/(Losses) arising during year 34 7 27
Level 2 [member]      
Disclosure of Detailed Information about Hedges [Line Items]      
Financial assets fair value 136 201  
Financial liabilities fair value (14) (13)  
Commodity Forward Contracts [member]      
Disclosure of Detailed Information about Hedges [Line Items]      
Gains/(Losses) arising during year 34 (2) 30
Currency Forward Contracts [member]      
Disclosure of Detailed Information about Hedges [Line Items]      
Gains/(Losses) arising during year 0 9 $ (3)
interest rate swaps [member] | Fair Value Hedges [member] | Level 2 [member]      
Disclosure of Detailed Information about Hedges [Line Items]      
Financial assets fair value 96 183  
Currency and commodity forwards [member] | Cash Flow Hedges [member] | Level 2 [member]      
Disclosure of Detailed Information about Hedges [Line Items]      
Financial assets fair value 37 8  
Financial liabilities fair value (2) (7)  
Currency swaps [member] | Derivatives Not Designated as Hedges [member] | Level 2 [member]      
Disclosure of Detailed Information about Hedges [Line Items]      
Financial assets fair value 2 2  
Financial liabilities fair value (2) (4)  
Currency swaps [member] | Net Investment Hedges [member] | Level 2 [member]      
Disclosure of Detailed Information about Hedges [Line Items]      
Financial assets fair value 1 8  
Financial liabilities fair value $ (10) $ (2)