Share-Based Compensation (Details 4) (USD $) In Millions, except Share data, unless otherwise specified	12 Months Ended
	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2011
Share-based compensation disclosures
Compensation cost	$ 11.4	$ 13.1	$ 13.3
Non-employee Board of Director's Plan
Share-based compensation disclosures
Compensation cost	1.2	1.2	1.1
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)	$ 21.31	$ 20.37	$ 23.46
Compensation cost	3.5	3.4	3.1
Unvested stock option cost	$ 3.2
Unvested stock option weighted average remaining life	1 year 9 months 18 days
Options outstanding (in shares)	1,063,895	1,088,728	1,022,606	956,807
Stock options | 1993 Plan
Share-based compensation disclosures
Options outstanding (in shares)	848,921
Stock options | Non-employee Board of Director's Plan
Share-based compensation disclosures
Options outstanding (in shares)	214,974