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INCOME TAXES - Income Tax Recognized in Profit or Loss (Details) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2018
Dec. 31, 2017
Dec. 31, 2016
Income Taxes [Abstract]      
Current income tax expense $ 318 $ 106 $ 33
Origination and reversal of temporary differences 53 92 (62)
Changes in tax rates or the imposition of new taxes (11) (41) 1
Previously unrecognized deferred taxes 4 16 43
Net income before income tax 1,170 747 543
Income tax expense calculated at the domestic rates applicable to profits in the country concerned 278 304 77
Change in substantively enacted tax rates (11) (41) 1
Earnings from investments in associates and joint ventures (3) (12) (34)
Portion of gains subject to different tax rates 141 2 (54)
Taxable income attributable to non-controlling interests (35) (65) (7)
International operations subject to different tax rates (17) (39) (6)
Deferred tax assets not recognized 4 15 41
Permanent differences and other 7 9 (3)
Total income tax expense $ 364 $ 173 $ 15