Income Taxes, Income Tax Examination, and Tax Credits and Carryforwards (Details) $ in Millions	12 Months Ended
	Mar. 31, 2018 USD ($)
Operating Loss Carryforwards [Line Items]
Unrecognized foreign withholding taxes and deferred tax liabilities	$ 6.0
Germany [Member]
Income Tax Examination [Line Items]
Open tax year for examination by tax jurisdictions	Fiscal 2011 - Fiscal 2017
Italy [Member]
Income Tax Examination [Line Items]
Open tax year for examination by tax jurisdictions	Calendar 2013 - Fiscal 2017
United States [Member]
Income Tax Examination [Line Items]
Open tax year for examination by tax jurisdictions	Fiscal 2015 - Fiscal 2017
Federal and State [Member]
Tax Credit Carryforward [Line Items]
Tax credit carryforwards, research and development	$ 31.5
Federal and State [Member] | Minimum [Member]
Tax Credit Carryforward [Line Items]
Tax loss credit carryforward, expiration date	Mar. 31, 2019
Federal and State [Member] | Maximum [Member]
Tax Credit Carryforward [Line Items]
Tax loss credit carryforward, expiration date	Mar. 31, 2038
Foreign Tax Jurisdictions [Member]
Operating Loss Carryforwards [Line Items]
Tax loss carryforwards	$ 475.0
Tax losses subject to expiration	132.7
Tax losses not subject to expiration	$ 342.3
Foreign Tax Jurisdictions [Member] | Minimum [Member]
Operating Loss Carryforwards [Line Items]
Tax loss carryforwards, expiration date	Mar. 31, 2019
Foreign Tax Jurisdictions [Member] | Maximum [Member]
Operating Loss Carryforwards [Line Items]
Tax loss carryforwards, expiration date	Mar. 31, 2038
State and Local [Member]
Operating Loss Carryforwards [Line Items]
Tax loss carryforwards	$ 183.1
State and Local [Member] | Minimum [Member]
Operating Loss Carryforwards [Line Items]
Tax loss carryforwards, expiration date	Mar. 31, 2019
State and Local [Member] | Maximum [Member]
Operating Loss Carryforwards [Line Items]
Tax loss carryforwards, expiration date	Mar. 31, 2038