Commitments and Contingencies - Additional Information (Detail) - USD ($) $ / shares in Units, $ in Millions	3 Months Ended		9 Months Ended
	Mar. 31, 2016	Mar. 31, 2015	Mar. 31, 2016	Mar. 31, 2015	Jan. 14, 2008
Commitments And Contingencies Disclosure [Abstract]
Adverse effect on earnings per share resulting from changing sales forecasts					$ 1.00
Gains relating to contingency			$ 2.1	$ 2.1
Costs relating to delayed delivery of product	$ 1.8	$ 9.8	$ 24.5	$ 24.5