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INCOME TAXES - Income Tax Recognized in Profit or Loss (Details) - USD ($) $ in Millions | 12 Months Ended
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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

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- Definition The amount of profit (loss) for a period before deducting tax expense. [Refer: Profit (loss)] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 12 -IssueDate 2017-01-01 -Paragraph 81 -Subparagraph c -Clause ii -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=12&date=2017-03-01&anchor=para_81_c_ii&doctype=Standard -URIDate 2017-03-09 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 12 -IssueDate 2017-01-01 -Paragraph 81 -Subparagraph c -Clause i -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=12&date=2017-03-01&anchor=para_81_c_i&doctype=Standard -URIDate 2017-03-09 + Details
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