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FINANCIAL INSTRUMENTS (Income Statement) (Details) - USD ($)
$ in Millions
3 Months Ended 9 Months Ended
Sep. 30, 2019
Sep. 30, 2018
Sep. 30, 2019
Sep. 30, 2018
Derivative [Line Items]        
Other income, net $ 1 $ 3 $ 13 $ 2
Other Nonoperating Income (Expense)        
Derivative [Line Items]        
Hedged items (Long-term debt) (20) 10 (76) 42
Other Nonoperating Income (Expense) | Fair Value Hedging        
Derivative [Line Items]        
Derivatives designated as hedging instruments $ 20 $ (10) $ 76 $ (42)