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FINANCIAL INSTRUMENTS (Income Statement) (Details) - USD ($) $ in Millions | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2018 | Sep. 30, 2017 | Sep. 30, 2018 | Sep. 30, 2017
Derivative [Line Items] |  |  |  |
Other income (expense), net | $ 3 | $ (2) | $ 2 | $ 12
Other Nonoperating Income (Expense) [Member] |  |  |  |
Derivative [Line Items] |  |  |  |
Hedged items (Long-term debt) | 10 | (1) | 42 | (12)
Other Nonoperating Income (Expense) [Member] | Fair Value Hedging [Member] |  |  |  |
Derivative [Line Items] |  |  |  |
Derivatives designated as hedging instruments | $ (10) | $ 1 | $ (42) | $ 12

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