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Risks Arising from Financial Instruments - Summary of Carrying Amount of Financial Assets (Detail) - USD ($)
$ in Millions
Dec. 31, 2021
Dec. 31, 2020
Disclosure of credit risk exposure [line items]    
Gross $ 18,258 $ 21,598
Debt Securities [Member]    
Disclosure of credit risk exposure [line items]    
Gross 396 418
Trade receivables [member]    
Disclosure of credit risk exposure [line items]    
Gross 3,465 3,285
Cash Deposits for Guarantees [Member]    
Disclosure of credit risk exposure [line items]    
Gross 168 184
Loans to customers [member]    
Disclosure of credit risk exposure [line items]    
Gross 117 142
Other receivables [member]    
Disclosure of credit risk exposure [line items]    
Gross 1,207 1,237
Derivatives [member]    
Disclosure of credit risk exposure [line items]    
Gross 669 965
Cash and Cash Equivalent [Member]    
Disclosure of credit risk exposure [line items]    
Gross 12,097 15,252
Equity instruments [member]    
Disclosure of credit risk exposure [line items]    
Gross 139 115
Gross carrying amount [member]    
Disclosure of credit risk exposure [line items]    
Gross 18,660 21,974
Gross carrying amount [member] | Debt Securities [Member]    
Disclosure of credit risk exposure [line items]    
Gross 396 418
Gross carrying amount [member] | Trade receivables [member]    
Disclosure of credit risk exposure [line items]    
Gross 3,796 3,593
Gross carrying amount [member] | Cash Deposits for Guarantees [Member]    
Disclosure of credit risk exposure [line items]    
Gross 168 184
Gross carrying amount [member] | Loans to customers [member]    
Disclosure of credit risk exposure [line items]    
Gross 117 142
Gross carrying amount [member] | Other receivables [member]    
Disclosure of credit risk exposure [line items]    
Gross 1,272 1,299
Gross carrying amount [member] | Derivatives [member]    
Disclosure of credit risk exposure [line items]    
Gross 669 965
Gross carrying amount [member] | Cash and Cash Equivalent [Member]    
Disclosure of credit risk exposure [line items]    
Gross 12,097 15,252
Gross carrying amount [member] | Equity instruments [member]    
Disclosure of credit risk exposure [line items]    
Gross 145 121
Impairment losses [member]    
Disclosure of credit risk exposure [line items]    
Gross (402) (376)
Impairment losses [member] | Trade receivables [member]    
Disclosure of credit risk exposure [line items]    
Gross (331) (308)
Impairment losses [member] | Other receivables [member]    
Disclosure of credit risk exposure [line items]    
Gross (65) (62)
Impairment losses [member] | Equity instruments [member]    
Disclosure of credit risk exposure [line items]    
Gross $ (6) $ (6)