Contractual Commitments, Contingencies, and Off-Balance Sheet Arrangements - Additional Information (Detail) $ in Millions	12 Months Ended
	Jun. 30, 2016 USD ($) term	Jun. 30, 2015 USD ($)	Jun. 30, 2014 USD ($)
Contractual Commitments Contingencies And Off- Balance Sheet Arrangements [Line Items]
Commitments under agreement	$ 33.0
Capitalized Costs related to the build out of the IBM data center	59.4
Capital commitment	4.8	$ 7.5
Remaining capital commitment	1.5
Expenses on agreements	106.0	99.9	$ 97.2
Amortization of capitalized costs	4.8	5.5	5.4
Outstanding letter of credit	$ 1.6
EU Information Technology Services Agreement [Member]
Contractual Commitments Contingencies And Off- Balance Sheet Arrangements [Line Items]
Number of renewal terms option one | term	1
Renewal term option one (in months)	12 months
Number of renewal terms option two | term	1
Renewal term option two (in months)	24 months
Capitalized Costs related to the build out of the IBM data center	$ 5.6
Expenses on agreements	7.5	4.6	1.5
Amortization of capitalized costs	0.6	0.4	0.0
Increase (Decrease) in asset balance	$ 0.3
Information Technology Services Agreement [Member]
Contractual Commitments Contingencies And Off- Balance Sheet Arrangements [Line Items]
Number of renewal terms option one | term	1
Renewal term option one (in months)	12 months
Commitments under agreement	$ 445.4
Expenses on agreements	98.5	95.3	95.7
Amortization of capitalized costs	4.3	$ 5.1	$ 5.4
Mainframe Software for Data Center Operations
Contractual Commitments Contingencies And Off- Balance Sheet Arrangements [Line Items]
Commitments under agreement	32.8
Other Noncurrent Assets [Member]
Contractual Commitments Contingencies And Off- Balance Sheet Arrangements [Line Items]
Capitalized Costs related to the build out of the IBM data center	$ 4.8