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FINANCIAL INSTRUMENTS - Derivative Assets and Liabilities (Details) - USD ($) $ in Millions | 12 Months Ended
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Dec. 31, 2017 | Dec. 31, 2016
Disclosure of detailed information about financial instruments [line items] |  |
Net deferred tax liabilities | $ 78 |
Change in fair value of non-hedge derivatives | 6 | $ 12
Effective portion of change in fair value of hedging instruments | (16) | 16
Net deferred tax liabilities | 32 | 78
Other current assets | 2 | 1
Other long-term assets | 1 | 1
Other current liabilities | (30) | (50)
Other long-term obligations | (2) | (28)
Cash flow hedge |  |
Disclosure of detailed information about financial instruments [line items] |  |
Net deferred tax liabilities | (76) | (263)
Derivative cash (inflow) outflow, operating activities | 62 | 156
Effective portion of change in fair value of hedging instruments | (19) | 25
Amount of gain (loss) recognized in income (ineffective portion and amount excluded from effectiveness testing) | 5 | 0
Excluded from effectiveness changes | (5) | 0
Net deferred tax liabilities | (29) | (76)
Other current assets | 2 | 1
Other long-term assets | 1 | 1
Other current liabilities | (30) | (50)
Other long-term obligations | (2) | (28)
Assets (liabilities) | (29) | (76)
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 | 11 | 12
Net deferred tax liabilities | 7 | 7
Non-hedging contracts | Cash flow hedge |  |
Disclosure of detailed information about financial instruments [line items] |  |
Change in fair value of non-hedge derivatives | $ 4 | $ 6

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