Common Stock (Details) (Common Stock [Member], USD $) In Millions, except Share data, unless otherwise specified	9 Months Ended
	Mar. 31, 2012	Nov. 01, 2011	Oct. 31, 2011	Oct. 29, 2010
Common Stock [Member]
Equity, Class of Treasury Stock [Line Items]
Approved stock repurchase program, authorized amount		$ 100		$ 40
Remaining capacity under the stock repurchase program	80.4		17.0
Repurchase of common stock (in shares)	1,837,395
Repurchase of common stock, amount	$ 32.1