Other Expenses, Net - Components of Other Expenses, Net (Detail) (USD $) In Millions, unless otherwise specified	3 Months Ended		9 Months Ended
	Mar. 31, 2013	Mar. 31, 2012	Mar. 31, 2013	Mar. 31, 2012
Income Statement [Abstract]
Interest expense on borrowings	$ 3.5	$ 3.6	$ 10.4	$ 9.9
Interest income	(0.4)	(0.6)	(1.3)	(1.6)
Foreign currency exchange loss	0.3	0.8	1.1	0.8
Other, net	0.4	0.5	1.6	1.3
Other expenses, net	$ 3.8	$ 4.3	$ 11.8	$ 10.4