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Share-Based Compensation (Details 4) (USD $) In Millions, except Share data, unless otherwise specified	12 Months Ended
	Jun. 30, 2012	Jun. 30, 2011	Jun. 30, 2010	Jun. 30, 2009
Share-based compensation disclosures
Compensation cost	$ 13.3	$ 14.4	$ 7.4
Director's Plan
Share-based compensation disclosures
Compensation cost	1.1	1.0	1.2
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)	$ 23.46	$ 14.75	$ 7.77
Compensation cost	3.1	3.8	2.2
Unvested stock option cost	$ 1.7
Unvested stock option weighted average remaining life	1 year 3 months 18 days
Options outstanding (in shares)	1,022,606	956,807	820,655	541,263
Stock options \| 1993 Plan
Share-based compensation disclosures
Options outstanding (in shares)	797,761
Stock options \| Director's Plan
Share-based compensation disclosures
Options outstanding (in shares)	224,845

Represents the expense recognized during the period arising from equity-based compensation arrangements (for example, shares of stock, unit, stock options or other equity instruments) with employees, directors and certain consultants qualifying for treatment as employees.

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- Definition

The number of shares reserved for issuance under stock option agreements awarded under the plan that validly exist and are outstanding as of the balance sheet date, including vested options.

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