Supplemental Balance Sheet Information - Other Accrued Liabilities (Detail) - USD ($) $ in Millions	Jun. 30, 2017	Jun. 30, 2016
Balance Sheet Related Disclosures [Abstract]
Accrued employee-related expenses	$ 96.4	$ 82.8
Restructuring accrual	5.9	6.1
Interest Payable, Current	0.9	0.0
Deferred revenue and fees	84.9	46.2
Accrued income tax	24.7	38.8
Other accrued liabilities and expenses	68.4	45.9
Other accrued liabilities	$ 281.2	$ 219.8