Other Expenses, Net - Components of Other Expenses, Net (Detail) (USD $) In Millions, unless otherwise specified	3 Months Ended		6 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2014	Dec. 31, 2013
Other Income and Expenses [Abstract]
Interest expense on borrowings	$ 6.2	$ 6.2	$ 12.4	$ 10.8
Interest income	(0.8)	(0.5)	(1.4)	(0.7)
Losses from equity method investments	1.9		3.4	0
Foreign currency exchange (gain) loss	0.2	0.6	0.2	(0.6)
Other, net	0.4	0.5	0.9	2.2
Other expenses, net	$ 7.9	$ 6.8	$ 15.5	$ 11.7