Property, Plant and Equipment, Net - Schedule of Property, Plant and Equipment, Net (Detail) - USD ($) $ in Millions	Jun. 30, 2015	Jun. 30, 2014
Property, Plant and Equipment [Line Items]
Land	$ 2.3
Buildings and improvements	18.2
Leasehold improvements	18.5	$ 18.9
Equipment	99.1	80.7
Gross property, plant and equipment	138.1	99.6
Less accumulated depreciation	(70.9)	(65.0)
Property, plant and equipment, net	$ 67.2	$ 34.6