Contingencies and Commitments - Environmental (Details) - USD ($) $ in Millions	12 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2014
Commitments and Contingencies Disclosure [Abstract]
Increase made by the company in the liabilities of environmental remediation costs	$ 0.3	$ 0.4	$ 0.7
Environmental remediation liability	$ 16.2	$ 15.9