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Derivatives - Cash flow hedges - Hedging instrument by hedged risk (Details)
number in Millions, $ in Millions
12 Months Ended
Dec. 31, 2022
USD ($)
Dec. 31, 2021
USD ($)
Disclosure of detailed information about hedging instruments [line items]    
Nominal amount 315,513 206,760
Carrying amount, assets $ 5,591 $ 2,811
Carrying amount, liabilities $ 3,667 $ 1,173
Cash flow hedges    
Disclosure of detailed information about hedging instruments [line items]    
Nominal amount 123,308 90,295
Carrying amount, assets $ 511 $ 939
Carrying amount, liabilities 1,116 424
Change in fair value of hedging instrument (4,338) 468
Change in fair value of hedged item (4,314) 487
Gain (loss) on hedge ineffectiveness recognised in profit or loss $ (24) $ (19)
Foreign currency    
Disclosure of detailed information about hedging instruments [line items]    
Nominal amount 38,924 43,839
Carrying amount, assets $ 525 $ 1,062
Carrying amount, liabilities $ 166 $ 207
Interest rate    
Disclosure of detailed information about hedging instruments [line items]    
Nominal amount 276,589 162,921
Carrying amount, assets $ 5,066 $ 1,749
Carrying amount, liabilities $ 3,501 $ 966
Interest rate | Cash flow hedges    
Disclosure of detailed information about hedging instruments [line items]    
Nominal amount 114,527 72,365
Derivatives | Foreign currency | Cash flow hedges    
Disclosure of detailed information about hedging instruments [line items]    
Nominal amount 8,781 17,930
Carrying amount, assets $ 418 $ 827
Carrying amount, liabilities 166 207
Change in fair value of hedging instrument 659 987
Change in fair value of hedged item 659 987
Gain (loss) on hedge ineffectiveness recognised in profit or loss $ 0 $ 0
Derivatives | Interest rate | Cash flow hedges    
Disclosure of detailed information about hedging instruments [line items]    
Nominal amount 114,527 72,365
Carrying amount, assets $ 93 $ 112
Carrying amount, liabilities 950 217
Change in fair value of hedging instrument (4,997) (519)
Change in fair value of hedged item (4,973) (500)
Gain (loss) on hedge ineffectiveness recognised in profit or loss $ (24) $ (19)