Contractual Commitments, Contingencies And Off-Balance Sheet Arrangements (Narrative) (Detail) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Jun. 30, 2012	Jun. 30, 2011	Jun. 30, 2010
Contractual Commitments Contingencies And Off- Balance Sheet Arrangements [Line Items]
Expiration date on agreement	December 2022
Expenses recorded related to agreement	$ 111.4	$ 110.4	$ 104.8
Cost incurred for services	6.3
Total Expenses on Agreements	203.4	181.3	162.1
Capitalized Costs related to the build out of the IBM data center	47.0	5.7
Outstanding letter of credit	0.7
Maintenance Costs [Member]
Contractual Commitments Contingencies And Off- Balance Sheet Arrangements [Line Items]
Expenses recorded related to agreement	2.9
IT Services Agreement [Member]
Contractual Commitments Contingencies And Off- Balance Sheet Arrangements [Line Items]
Expiration date on agreement	June 2012
Commitments under agreement	552.6
Total Expenses on Agreements	$ 24.6	$ 6.3
Automatic Data Processing [Member]
Contractual Commitments Contingencies And Off- Balance Sheet Arrangements [Line Items]
Expiration date on agreement	June 30, 2012