Accrued Expenses and Other Current Liabilities - Components of Accrued Expenses and Other Current Liabilities (Detail) - USD ($) $ in Millions	Jun. 30, 2016	Jun. 30, 2015
Payables and Accruals [Abstract]
Employee compensation and benefits	$ 181.2	$ 163.2
Accrued broker fees	65.4	63.4
Accrued taxes	49.9	28.5
Accrued dividend payable	34.9	31.4
Other	20.7	33.9
Total	$ 352.2	$ 320.4