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FINANCIAL INSTRUMENTS (Income Statement) (Details) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2018
Dec. 31, 2017
Dec. 31, 2016
Derivative [Line Items]      
Other (expense) income, net $ (8) $ 16 $ (48)
Other Nonoperating Income (Expense) [Member]      
Derivative [Line Items]      
Hedged items (Long-term debt) 4 1  
Other Nonoperating Income (Expense) [Member] | Fair Value Hedging [Member]      
Derivative [Line Items]      
Derivatives designated as hedging instruments $ (4) $ (1)