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Derivatives And Hedging Activities (Narrative) (Details) - USD ($)
$ in Millions
6 Months Ended
Sep. 30, 2020
Mar. 31, 2020
Sep. 30, 2019
Feb. 26, 2019
Foreign Exchange Forward [Member]        
Derivative [Line Items]        
Notional amount of derivative contracts $ 19.8 $ 8.9 $ 36.0  
Cash Flow Hedging [Member] | Interest Rate Swap [Member]        
Derivative [Line Items]        
Notional amount of derivative contracts 370.0      
Derivative, Fair Value, Net 1.8     $ 5.4
Cash Flow Hedging [Member] | Foreign Exchange Forward [Member]        
Derivative [Line Items]        
Net unrealized gain (loss) on foreign currency derivatives designated as cash flow hedges $ (9.0)