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FINANCIAL INSTRUMENTS - Derivative Assets and Liabilities (Details) - USD ($) $ in Millions | 12 Months Ended
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Dec. 31, 2018 | Dec. 31, 2017
Disclosure of detailed information about financial instruments [line items] |  |
Net deferred tax liabilities | $ 32 |
Change in fair value of non-hedge derivatives | 0 | $ 6
Effective portion of change in fair value of hedging instruments | 8 | (16)
Net deferred tax liabilities | 3 | 32
Other current assets | 2 | 2
Other long-term assets | 1 | 1
Other current liabilities | (3) | (30)
Other long-term obligations | 0 | (2)
Cash flow hedge |  |
Disclosure of detailed information about financial instruments [line items] |  |
Net deferred tax liabilities | (29) | (76)
Derivative cash (inflow) outflow, operating activities | 11 | 62
Effective portion of change in fair value of hedging instruments | 20 | (19)
Amount of gain (loss) recognized in income (ineffective portion and amount excluded from effectiveness testing) | 0 | 5
Excluded from effectiveness changes | 0 | (5)
Net deferred tax liabilities | 0 | (29)
Other current assets | 2 | 2
Other long-term assets | 1 | 1
Other current liabilities | (3) | (30)
Other long-term obligations | 0 | (2)
Assets (liabilities) | 0 | (29)
Non-hedging contracts |  |
Disclosure of detailed information about financial instruments [line items] |  |
Net deferred tax liabilities | 7 |
Change in fair value of non-hedge derivatives | 0 | 11
Net deferred tax liabilities | 1 | 7
Non-hedging contracts | Cash flow hedge |  |
Disclosure of detailed information about financial instruments [line items] |  |
Change in fair value of non-hedge derivatives | $ (2) | $ 4

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- Definition The amount of current derivative financial assets. [Refer: Derivative financial assets] + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Name IAS -Number 1 -IssueDate 2018-01-01 -Paragraph 55 -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=1&date=2018-03-01&anchor=para_55&doctype=Standard -URIDate 2018-03-16 + Details
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- Definition The amount of current derivative financial liabilities. [Refer: Derivative financial liabilities] + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Name IAS -Number 1 -IssueDate 2018-01-01 -Paragraph 55 -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=1&date=2018-03-01&anchor=para_55&doctype=Standard -URIDate 2018-03-16 + Details
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