Segment and Related Information - Reconciliation of Assets by Operating Segment to Total Assets (Detail) - USD ($) $ in Millions		Jun. 30, 2015	Jun. 30, 2014
Segment Reporting, Asset Reconciling Item [Line Items]
Assets		$ 766.2	$ 823.8
Operating Segments
Segment Reporting, Asset Reconciling Item [Line Items]
Assets		580.8	553.3
Cash, cash equivalents, and marketable investment securities
Segment Reporting, Asset Reconciling Item [Line Items]
Assets	[1]	$ 185.4	$ 270.5

[1] The Company manages cash, cash equivalents, and marketable investment securities at the consolidated level for all segments