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INCOME TAXES - Income Tax Recognized in Profit or Loss (Details) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2017
Income Taxes [Abstract]      
Current income tax expense $ 250 $ 318 $ 106
Origination and reversal of temporary differences 29 53 92
Changes in tax rates or the imposition of new taxes (20) (11) (41)
Previously unrecognized deferred taxes 19 4 16
Net income before income tax 928 1,170 747
Income tax expense calculated at the domestic rates applicable to profits in the country concerned 354 278 304
Change in substantively enacted tax rates (20) (11) (41)
Earnings from investments in associates and joint ventures (50) (3) (12)
Portion of gains subject to different tax rates 34 141 2
Taxable income attributable to non-controlling interests (62) (35) (65)
International operations subject to different tax rates (6) (17) (39)
Deferred tax assets not recognized 19 4 15
Permanent differences and other 9 7 9
Total income tax expense $ 278 $ 364 $ 173