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FINANCIAL INSTRUMENTS (Income Statement) (Details) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2017 | Dec. 31, 2016 | Dec. 31, 2015
Derivative [Line Items] |  |  |
Other income (expense), net | $ 16 | $ (48) | $ (143)
Other Nonoperating Income (Expense) [Member] |  |  |
Derivative [Line Items] |  |  |
Hedged items (Long-term debt) | 1 |  |
Other Nonoperating Income (Expense) [Member] | Fair Value Hedging [Member] |  |  |
Derivative [Line Items] |  |  |
Derivatives designated as hedging instruments | $ (1) |  |

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- Definition Amount of the increase (decrease) in fair value of the hedged item in a fair value hedge recognized in the income statement. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 25 -Section 50 -Paragraph 1 -Subparagraph (a)(1) -URI http://asc.fasb.org/extlink&oid=6886632&loc=d3e76258-113986 + Details
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- Definition Amount of income (expense) related to nonoperating activities, classified as other. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 225 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03.9) -URI http://asc.fasb.org/extlink&oid=63488584&loc=d3e20235-122688 + Details
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