Income Taxes, Income Tax Examination, and Tax Credits and Carryforwards (Details) $ in Millions	12 Months Ended
	Mar. 31, 2019 USD ($)
Operating Loss Carryforwards [Line Items]
Unrecognized foreign withholding taxes and deferred tax liabilities	$ 7.0
Germany [Member]
Income Tax Examination [Line Items]
Open tax year for examination by tax jurisdictions	Fiscal 2011 - Fiscal 2018
Italy [Member]
Income Tax Examination [Line Items]
Open tax year for examination by tax jurisdictions	Calendar 2014 - Fiscal 2018
United States [Member]
Income Tax Examination [Line Items]
Open tax year for examination by tax jurisdictions	Fiscal 2016 - Fiscal 2018
Federal and State [Member]
Tax Credit Carryforward [Line Items]
Tax credit carryforwards, research and development	$ 60.0
Federal and State [Member] | Minimum [Member]
Tax Credit Carryforward [Line Items]
Tax loss credit carryforward, expiration date	Mar. 31, 2020
Federal and State [Member] | Maximum [Member]
Tax Credit Carryforward [Line Items]
Tax loss credit carryforward, expiration date	Mar. 31, 2039
Foreign Tax Jurisdictions [Member]
Operating Loss Carryforwards [Line Items]
Tax loss carryforwards	$ 351.6
Tax losses subject to expiration	9.7
Tax losses not subject to expiration	$ 341.9
Foreign Tax Jurisdictions [Member] | Minimum [Member]
Operating Loss Carryforwards [Line Items]
Tax loss carryforwards, expiration date	Mar. 31, 2020
Foreign Tax Jurisdictions [Member] | Maximum [Member]
Operating Loss Carryforwards [Line Items]
Tax loss carryforwards, expiration date	Mar. 31, 2034
State and Local [Member]
Operating Loss Carryforwards [Line Items]
Tax loss carryforwards	$ 129.5
State and Local [Member] | Minimum [Member]
Operating Loss Carryforwards [Line Items]
Tax loss carryforwards, expiration date	Mar. 31, 2020
State and Local [Member] | Maximum [Member]
Operating Loss Carryforwards [Line Items]
Tax loss carryforwards, expiration date	Mar. 31, 2039