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Derivative Instruments (Details)
$ in Millions
3 Months Ended 9 Months Ended
Dec. 31, 2019
USD ($)
contract
Dec. 31, 2018
USD ($)
Dec. 31, 2019
USD ($)
contract
Dec. 31, 2018
USD ($)
Mar. 31, 2019
contract
Derivative [Line Items]          
Percentage of company sales denominated in US dollars     99.00%    
Foreign currency transaction losses, before tax $ 2.6 $ 1.9 $ 2.9 $ 6.3  
Foreign currency forward contracts outstanding | contract 0   0   0
Other income (loss), net | Not designated as hedging instrument | Foreign exchange forward contract          
Derivative [Line Items]          
Gain (loss) on foreign currency derivatives $ 0.0 $ 0.0 $ 0.0 $ 0.0