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DERIVATIVE FINANCIAL INSTRUMENTS - Notional Amount of Derivative Instruments Fair Value Through Profit or Loss (Details) - USD ($)
$ in Millions
Dec. 31, 2020
Dec. 31, 2019
Disclosure of detailed information about hedging instruments [line items]    
Notional Amount (U.S. Dollars) $ 14,743 $ 15,855
Fair value through profit or loss    
Disclosure of detailed information about hedging instruments [line items]    
Notional Amount (U.S. Dollars) 2,706 1,702
Elected for hedge accounting    
Disclosure of detailed information about hedging instruments [line items]    
Notional Amount (U.S. Dollars) 12,037 14,153
Less than 1 year | Fair value through profit or loss    
Disclosure of detailed information about hedging instruments [line items]    
Notional Amount (U.S. Dollars) 974  
Less than 1 year | Elected for hedge accounting    
Disclosure of detailed information about hedging instruments [line items]    
Notional Amount (U.S. Dollars) 867  
1 to 5 years | Fair value through profit or loss    
Disclosure of detailed information about hedging instruments [line items]    
Notional Amount (U.S. Dollars) 1,732  
1 to 5 years | Elected for hedge accounting    
Disclosure of detailed information about hedging instruments [line items]    
Notional Amount (U.S. Dollars) 6,591  
Thereafter | Fair value through profit or loss    
Disclosure of detailed information about hedging instruments [line items]    
Notional Amount (U.S. Dollars) 0  
Thereafter | Elected for hedge accounting    
Disclosure of detailed information about hedging instruments [line items]    
Notional Amount (U.S. Dollars) 4,579  
Foreign exchange contracts    
Disclosure of detailed information about hedging instruments [line items]    
Notional Amount (U.S. Dollars) 3,274 4,626
Foreign exchange contracts | Fair value through profit or loss    
Disclosure of detailed information about hedging instruments [line items]    
Notional Amount (U.S. Dollars) 1,723 1,416
Foreign exchange contracts | Elected for hedge accounting    
Disclosure of detailed information about hedging instruments [line items]    
Notional Amount (U.S. Dollars) 1,551 3,210
Foreign exchange contracts | Less than 1 year | Fair value through profit or loss    
Disclosure of detailed information about hedging instruments [line items]    
Notional Amount (U.S. Dollars) 867  
Foreign exchange contracts | Less than 1 year | Elected for hedge accounting    
Disclosure of detailed information about hedging instruments [line items]    
Notional Amount (U.S. Dollars) 438  
Foreign exchange contracts | 1 to 5 years | Fair value through profit or loss    
Disclosure of detailed information about hedging instruments [line items]    
Notional Amount (U.S. Dollars) 856  
Foreign exchange contracts | 1 to 5 years | Elected for hedge accounting    
Disclosure of detailed information about hedging instruments [line items]    
Notional Amount (U.S. Dollars) 510  
Foreign exchange contracts | Thereafter | Fair value through profit or loss    
Disclosure of detailed information about hedging instruments [line items]    
Notional Amount (U.S. Dollars) 0  
Foreign exchange contracts | Thereafter | Elected for hedge accounting    
Disclosure of detailed information about hedging instruments [line items]    
Notional Amount (U.S. Dollars) 603  
Interest rate swaps, cross currency interest rate swaps and other    
Disclosure of detailed information about hedging instruments [line items]    
Notional Amount (U.S. Dollars) 11,265 10,996
Interest rate swaps, cross currency interest rate swaps and other | Fair value through profit or loss    
Disclosure of detailed information about hedging instruments [line items]    
Notional Amount (U.S. Dollars) 779 53
Interest rate swaps, cross currency interest rate swaps and other | Elected for hedge accounting    
Disclosure of detailed information about hedging instruments [line items]    
Notional Amount (U.S. Dollars) 10,486 10,943
Interest rate swaps, cross currency interest rate swaps and other | Less than 1 year | Fair value through profit or loss    
Disclosure of detailed information about hedging instruments [line items]    
Notional Amount (U.S. Dollars) 75  
Interest rate swaps, cross currency interest rate swaps and other | Less than 1 year | Elected for hedge accounting    
Disclosure of detailed information about hedging instruments [line items]    
Notional Amount (U.S. Dollars) 429  
Interest rate swaps, cross currency interest rate swaps and other | 1 to 5 years | Fair value through profit or loss    
Disclosure of detailed information about hedging instruments [line items]    
Notional Amount (U.S. Dollars) 704  
Interest rate swaps, cross currency interest rate swaps and other | 1 to 5 years | Elected for hedge accounting    
Disclosure of detailed information about hedging instruments [line items]    
Notional Amount (U.S. Dollars) 6,081  
Interest rate swaps, cross currency interest rate swaps and other | Thereafter | Fair value through profit or loss    
Disclosure of detailed information about hedging instruments [line items]    
Notional Amount (U.S. Dollars) 0  
Interest rate swaps, cross currency interest rate swaps and other | Thereafter | Elected for hedge accounting    
Disclosure of detailed information about hedging instruments [line items]    
Notional Amount (U.S. Dollars) 3,976  
Inflation linked swaps | Fair value through profit or loss    
Disclosure of detailed information about hedging instruments [line items]    
Notional Amount (U.S. Dollars) 172 167
Inflation linked swaps | Less than 1 year | Fair value through profit or loss    
Disclosure of detailed information about hedging instruments [line items]    
Notional Amount (U.S. Dollars) 0  
Inflation linked swaps | 1 to 5 years | Fair value through profit or loss    
Disclosure of detailed information about hedging instruments [line items]    
Notional Amount (U.S. Dollars) 172  
Inflation linked swaps | Thereafter | Fair value through profit or loss    
Disclosure of detailed information about hedging instruments [line items]    
Notional Amount (U.S. Dollars) 0  
Commodity contracts    
Disclosure of detailed information about hedging instruments [line items]    
Notional Amount (U.S. Dollars) 32 66
Commodity contracts | Fair value through profit or loss    
Disclosure of detailed information about hedging instruments [line items]    
Notional Amount (U.S. Dollars) 32 $ 66
Commodity contracts | Less than 1 year | Fair value through profit or loss    
Disclosure of detailed information about hedging instruments [line items]    
Notional Amount (U.S. Dollars) 32  
Commodity contracts | 1 to 5 years | Fair value through profit or loss    
Disclosure of detailed information about hedging instruments [line items]    
Notional Amount (U.S. Dollars) 0  
Commodity contracts | Thereafter | Fair value through profit or loss    
Disclosure of detailed information about hedging instruments [line items]    
Notional Amount (U.S. Dollars) $ 0