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Derivative Instruments and Hedging Activities (Narrative) (Details) - USD ($)
$ in Millions
9 Months Ended
Dec. 31, 2021
Mar. 31, 2021
Derivative [Line Items]    
Remaining maturity of forward foreign exchange contracts, maximum 13 years  
Interest rate swap cash flow hedge loss estimated to be reclassified into earnings during next 12 months $ 42.3  
Maximum    
Derivative [Line Items]    
Foreign currency cash flow hedge gains estimated to be reclassified into earnings during next 12 months 0.3  
Interest rate swaps    
Derivative [Line Items]    
Gross amount of swaps in an asset position subject to master netting arrangement 153.6 $ 211.2
Gross amount of swaps in an liability position subject to master netting arrangement 195.2 236.3
Net asset of swaps subject to master netting arrangement 15.1 50.8
Net liability of swaps subject to master netting arrangement $ 56.7 $ 75.9