Fair Value of Financial Instruments - Financial assets and liabilities recorded within Condensed Consolidated Balance Sheets and accounted for at fair value on a recurring basis by level within the fair value hierarchy (Details) - Estimate of Fair Value Measurement - Fair Value, Measurements, Recurring - Forward currency exchange contracts - USD ($) $ in Millions	Mar. 31, 2020	Mar. 31, 2019
Other current assets
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Derivatives assets, current	$ 0.1	$ 0.1
Accounts payable and accrued expenses
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Derivative liabilities, current	0.2	0.1
Level 2 | Other current assets
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Derivatives assets, current	0.1	0.1
Level 2 | Accounts payable and accrued expenses
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Derivative liabilities, current	$ 0.2	$ 0.1