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Income Taxes, Income Tax Examination, and Tax Credits and Carryforwards (Details) $ in Millions | 12 Months Ended
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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

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