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FINANCIAL INSTRUMENTS (Narrative) (Details) - USD ($)
$ in Millions
3 Months Ended
Mar. 31, 2021
Dec. 31, 2020
Derivative [Line Items]    
Accumulated other comprehensive loss $ (31) $ (21)
Net amount of deferred gains and losses on cash flow hedges that is expected to be reclassified within the next 12 months 1  
Cash Flow Hedging    
Derivative [Line Items]    
Accumulated other comprehensive loss $ 1 $ 1