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INVESTMENT IN ASSOCIATES AND JOINT VENTURES - Income Statement Impact of Investments (Details) - USD ($)
$ in Millions
3 Months Ended 6 Months Ended 12 Months Ended
Jun. 30, 2020
Jun. 30, 2019
Jun. 30, 2020
Jun. 30, 2019
Dec. 31, 2019
Disclosure Of Associates And Joint Ventures [Line Items]          
Revenues $ 1,946 $ 1,685 $ 4,142 $ 3,278  
Net income 34 254 182 419  
Share of profit (loss) of associates and joint ventures accounted for using equity method 11 34 59 52 $ 224
Associates and Joint Ventures          
Disclosure Of Associates And Joint Ventures [Line Items]          
Revenues 1,804 1,319 3,591 2,850  
Net income $ 70 $ 83 $ 219 $ 134