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Common Stock and Share-based Compensation Plans (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Jun. 30, 2012	Jun. 30, 2011	Jun. 30, 2010
Common Stock and Share-based Compensation Plans [Abstract]
Compensation expense	$ 10.5	$ 8.9	$ 10.8
Income tax benefit from compensation expense	$ 3.9	$ 3.3	$ 4.1

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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