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Derivative Financial Instruments - Narrative (Details) - USD ($)
$ in Millions
6 Months Ended
Sep. 30, 2020
Mar. 31, 2020
Derivative [Line Items]    
Additional term to recognize derivative loss in Accumulated Other Comprehensive Loss 2 months  
Not Designated as Hedging Instrument | Foreign Exchange Forward And Swap    
Derivative [Line Items]    
Derivative term of contract 1 month  
Derivative, notional amount $ 86.5 $ 64.7
Foreign Exchange Forward | Designated as hedging instruments | Cash flow hedges    
Derivative [Line Items]    
Derivative term of contract 4 months  
Derivative, notional amount $ 155.5 $ 48.0
Cash flow hedge gain to be reclassified within twelve months $ (2.0)