Other Expenses, Net - Components of Other Expenses, Net (Detail) (USD $) In Millions, unless otherwise specified	3 Months Ended		6 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2013	Dec. 31, 2012
Other Expenses [Abstract]
Interest expense on borrowings	$ 6.2	$ 3.4	$ 10.8	$ 6.9
Interest income	(0.5)	(0.4)	(0.7)	(0.9)
Foreign currency exchange (gain) loss	0.6		(0.6)	0.8
Other, net	0.5	0.7	2.2	1.2
Other expenses, net	$ 6.8	$ 3.7	$ 11.7	$ 8.0