Contingencies and Commitments (Details) - USD ($) $ in Millions	12 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2013
Commitments and Contingencies Disclosure [Abstract]
Increase made by the company in the liabilities of environmental remediation costs	$ 0.4	$ 0.7	$ 0.3
Environmental remediation liability	$ 15.9	$ 15.5