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FINANCIAL INSTRUMENTS (Narrative) (Details) - USD ($)
12 Months Ended
Mar. 31, 2021
Mar. 31, 2020
Dec. 31, 2019
Derivative [Line Items]      
Accumulated other comprehensive loss   $ (58,000,000) $ (39,000,000)
Cash Flow Hedging      
Derivative [Line Items]      
Accumulated other comprehensive loss   $ 4,000,000 $ 4,000,000
Cash Flow Hedging | Scenario, Forecast      
Derivative [Line Items]      
Net amount of deferred gains and losses on cash flow hedges that is expected to be reclassified within the next 12 months $ 1,000,000    
Fair Value Hedging | One-Month LIBOR | Minimum      
Derivative [Line Items]      
Floating rate   2.20%  
Fair Value Hedging | One-Month LIBOR | Maximum      
Derivative [Line Items]      
Floating rate   3.00%  
Forward Starting Interest Rate Swaps      
Derivative [Line Items]      
Notional amount   $ 25,000,000