Accrued Expenses and Other Current Liabilities - Components of Accrued Expenses and Other Current Liabilities (Detail) (USD $) In Millions, unless otherwise specified	Dec. 31, 2013	Jun. 30, 2013
Payables And Accruals [Abstract]
Employee compensation and benefits	$ 108.9	$ 143.1
Accrued broker fees	25.8	49.2
Accrued income tax liability	13.0	51.8
Accrued dividend payable	24.6	21.0
Other	19.9	12.1
Total	$ 192.2	$ 277.2