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DERIVATIVE FINANCIAL INSTRUMENTS - Notional Amount of Foreign Exchange Derivative Instruments (Details) - USD ($)
$ in Millions
Dec. 31, 2019
Dec. 31, 2018
Disclosure of information about terms and conditions of hedging instruments and how they affect future cash flows [line items]    
Notional Amount (U.S. Dollars) $ 15,855 $ 9,966
Foreign exchange contracts    
Disclosure of information about terms and conditions of hedging instruments and how they affect future cash flows [line items]    
Notional Amount (U.S. Dollars) 4,626 3,482
Foreign exchange contracts | Australian dollars    
Disclosure of information about terms and conditions of hedging instruments and how they affect future cash flows [line items]    
Notional Amount (U.S. Dollars) $ 1,102 $ 1,184
Average Exchange Rate 73.00% 75.00%
Foreign exchange contracts | British pounds    
Disclosure of information about terms and conditions of hedging instruments and how they affect future cash flows [line items]    
Notional Amount (U.S. Dollars) $ 2,882 $ 1,263
Average Exchange Rate 131.00% 136.00%
Foreign exchange contracts | European Union euros    
Disclosure of information about terms and conditions of hedging instruments and how they affect future cash flows [line items]    
Notional Amount (U.S. Dollars) $ 365 $ 461
Average Exchange Rate 125.00% 122.00%
Foreign exchange contracts | Chilean pesos    
Disclosure of information about terms and conditions of hedging instruments and how they affect future cash flows [line items]    
Notional Amount (U.S. Dollars) $ 242 $ 255
Average Exchange Rate 0.15% 0.15%
Foreign exchange contracts | COP    
Disclosure of information about terms and conditions of hedging instruments and how they affect future cash flows [line items]    
Notional Amount (U.S. Dollars) $ 19 $ 0
Average Exchange Rate 0.03% 0.00%
Foreign exchange contracts | Peruvian soles    
Disclosure of information about terms and conditions of hedging instruments and how they affect future cash flows [line items]    
Notional Amount (U.S. Dollars) $ 12 $ 11
Average Exchange Rate 29.00% 30.00%
Foreign exchange contracts | Canadian dollars    
Disclosure of information about terms and conditions of hedging instruments and how they affect future cash flows [line items]    
Notional Amount (U.S. Dollars) $ 4 $ 308
Average Exchange Rate 76.00% 78.00%