Condensed Consolidated Balance Sheets (Parenthetical) (USD $) In Millions, except Per Share data	Sep. 30, 2011	Jun. 30, 2011
Condensed Consolidated Balance Sheets [Abstract]
Allowance for doubtful accounts	$ 2.0	$ 2.0
Preferred stock, shares Authorized	25.0	25.0
Preferred stock, shares issued	0	0
Preferred stock, shares outstanding	0	0
Common stock, par value	$ 0.01	$ 0.01
Common stock, shares Authorized	650.0	650.0
Common stock, shares issued	149.9	149.6
Common stock, shares outstanding	123.6	123.7
Treasury stock, shares	26.3	25.9