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FINANCIAL INSTRUMENTS - Derivatives Not Designated as Hedging Instruments (Details) - USD ($)
$ in Millions
3 Months Ended
Mar. 31, 2021
Mar. 31, 2020
Foreign currency | Derivatives not designated as hedging instruments: | Selling, general and administrative expenses    
Derivative [Line Items]    
Gain (loss) on derivatives not designated as hedges $ 1 $ 3