Consolidated Statements Of Shareholders' Equity (Parenthetical) (USD $) In Millions, except Share data, unless otherwise specified	12 Months Ended
	Jun. 30, 2012	Jun. 30, 2011	Jun. 30, 2010	Jun. 30, 2009
Cumulative loss on interest rate swaps, tax benefit	$ 17.6	$ 12.5
Foreign currency translation gain	$ (0.4)	$ 0.3
Common stock and Treasury stock
Common stock, par value	$ 0.01	$ 0.01
Common stock, shares authorized	600,000,000	600,000,000
Treasury stock, Beginning Balance	13,333,972	123,000
Common stock outstanding, Beginning Balance	129,811,749	142,852,418	119,770,277
Repurchased, Common Stock	(5,568,168)	(13,210,972)	(123,000)
Repurchased for treasury	5,568,168	13,210,972	123,000
Public offering			23,000,000
Issued for stock-based compensation plans	234,226	170,303	205,141
Common stock outstanding, Ending Balance	124,477,807	129,811,749	142,852,418	119,770,277
Treasury stock, Ending Balance	18,902,140	13,333,972	123,000