Share-Based Compensation (Details 4) (USD $) In Millions, except Share data, unless otherwise specified	12 Months Ended
	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2011	Jun. 30, 2010
Share-based compensation disclosures
Compensation cost	$ 13.1	$ 13.3	$ 14.4
Director's Plan
Share-based compensation disclosures
Compensation cost	1.2	1.1	1.0
Unvested stock option cost	0.3
Unvested stock option weighted average remaining life	3 months 18 days
Stock options
Share-based compensation disclosures
Weighted average grant date fair value (in dollars per share)	$ 20.37	$ 23.46	$ 14.75
Compensation cost	3.4	3.1	3.8
Unvested stock option cost	$ 2.0
Unvested stock option weighted average remaining life	1 year 4 months 24 days
Options outstanding (in shares)	1,088,728	1,022,606	956,807	820,655
Stock options | 1993 Plan
Share-based compensation disclosures
Options outstanding (in shares)	877,477
Stock options | Director's Plan
Share-based compensation disclosures
Options outstanding (in shares)	211,251