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Income Taxes Income Tax (Taxing Jurisdictions) (Details) - USD ($) $ in Millions	12 Months Ended
	Jun. 30, 2019	Jun. 30, 2018
Income Tax Examination [Line Items]
Tax Cuts and Jobs Act, Accounting Complete [true false]	0
Deferred Tax Assets, Net of Valuation Allowance, Current		$ 0.0
Deferred Tax Liabilities, Net, Current		$ 0.0
Earliest Tax Year [Member] \| Internal Revenue Service (IRS) [Member]
Income Tax Examination [Line Items]
Income Tax Examination, Year under Examination	2018
Earliest Tax Year [Member] \| INDIA
Income Tax Examination [Line Items]
Income Tax Examination, Year under Examination	2003
Earliest Tax Year [Member] \| WISCONSIN
Income Tax Examination [Line Items]
Income Tax Examination, Year under Examination	2011
Earliest Tax Year [Member] \| MICHIGAN
Income Tax Examination [Line Items]
Income Tax Examination, Year under Examination	2012
Latest Tax Year [Member] \| Internal Revenue Service (IRS) [Member]
Income Tax Examination [Line Items]
Income Tax Examination, Year under Examination	2019
Latest Tax Year [Member] \| INDIA
Income Tax Examination [Line Items]
Income Tax Examination, Year under Examination	2015
Latest Tax Year [Member] \| WISCONSIN
Income Tax Examination [Line Items]
Income Tax Examination, Year under Examination	2014
Latest Tax Year [Member] \| MICHIGAN
Income Tax Examination [Line Items]
Income Tax Examination, Year under Examination	2014