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FINANCIAL INSTRUMENTS (Income Statement) (Details) - USD ($)
$ in Millions
3 Months Ended 6 Months Ended
Jun. 30, 2019
Jun. 30, 2018
Jun. 30, 2019
Jun. 30, 2018
Derivative [Line Items]        
Other income (expense), net $ 3 $ 1 $ 12 $ (1)
Other Nonoperating Income (Expense)        
Derivative [Line Items]        
Hedged items (Long-term debt) (40) 7 (56) 32
Other Nonoperating Income (Expense) | Fair Value Hedging        
Derivative [Line Items]        
Derivatives designated as hedging instruments $ 40 $ (7) $ 56 $ (32)