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DERIVATIVE FINANCIAL INSTRUMENTS - Additional Information (Details) - USD ($)
$ in Millions
Dec. 31, 2019
Dec. 31, 2018
Disclosure of detailed information about hedging instruments [line items]    
Notional amount $ 15,855 $ 9,966
Financial assets at fair value through profit or loss, category    
Disclosure of detailed information about hedging instruments [line items]    
Notional amount 1,702 2,228
Interest rate swaps, cross currency interest rate swaps and other    
Disclosure of detailed information about hedging instruments [line items]    
Notional amount 10,996 6,324
Interest rate swaps, cross currency interest rate swaps and other | Financial assets at fair value through profit or loss, category    
Disclosure of detailed information about hedging instruments [line items]    
Notional amount 119 300
Inflation linked swap contract | Financial assets at fair value through profit or loss, category    
Disclosure of detailed information about hedging instruments [line items]    
Notional amount 167 160
Floating Interest Rate Derivatives    
Disclosure of detailed information about hedging instruments [line items]    
Notional amount   $ 3,445
Bank bill swap rate    
Disclosure of detailed information about hedging instruments [line items]    
Notional amount 1,916  
Floating Interest Rate Benchmarked Against CDOR    
Disclosure of detailed information about hedging instruments [line items]    
Notional amount $ 1,501