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DERIVATIVE INSTRUMENTS - Fair Values of Instruments Designated as Hedges (Details) - Cash Flow Hedges - Designated Hedge - USD ($)
$ in Millions
Sep. 30, 2019
Dec. 31, 2018
Other current liabilities    
Derivative contracts    
Fair Value of Derivative Instruments, Liabilities   $ 2
Other non-current liabilities    
Derivative contracts    
Fair Value of Derivative Instruments, Liabilities $ 2 $ 3