Income Taxes (Narrative) (Details) - USD ($) $ in Millions	12 Months Ended
	Jun. 30, 2017	Jun. 30, 2018
Operating Loss Carryforwards [Line Items]
Undistributed earnings of foreign subsidiaries	$ 61.8
Deferred Tax Liability Not Recognized, Amount of Unrecognized Deferred Tax Liability, Undistributed Earnings of Foreign Subsidiaries	21.3
Foreign Tax Authority [Member]
Operating Loss Carryforwards [Line Items]
Net operating loss carryforward balance	389.5
Federal [Member]
Operating Loss Carryforwards [Line Items]
Net operating loss carryforward balance	1,662.5
Net operating losses used in the period	952.0
Current annual net operating loss usage	88.6
State and Local Jurisdiction [Member]
Operating Loss Carryforwards [Line Items]
Uncertain tax positions	0.2
Net operating loss carryforward balance	42.1
Current annual net operating loss usage	$ 39.3
Scenario, Forecast [Member] | Federal [Member]
Operating Loss Carryforwards [Line Items]
Net operating loss carryforward balance		$ 167.0