Additional Cash Flow Information (Detail) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2011
Schedule of Cash Flow, Supplemental [Line Items]
Income taxes paid	$ 28.1	$ 50.5	$ 30.5
Interest paid	1.9	0.7	0.6
Gaming operations equipment transferred to inventory	0.7	6.9	3.9
Business acquisitions/purchase price adjustments
Fair value of assets	0.3
Fair value of liabilities	0.3
Business Acquisition
Schedule of Cash Flow, Supplemental [Line Items]
Fair value of liabilities		$ 20.2