Shareowners' Equity (Details) (USD $) In Millions, except Per Share data	1 Months Ended		12 Months Ended
	Jun. 30, 2011	Jun. 30, 2008	Jul. 31, 2011	Aug. 01, 2010	Aug. 02, 2009
Capital stock, shares authorized			560	560
Capital stock, par value			$ 0.0375	$ 0.0375
Preferred stock, shares authorized			40	40
Shares repurchased, value			$ 728	$ 472	$ 527
Capital Stock In Treasury [Member]
Authorized amount for shares repurchase	1,000	1,200
Shares repurchased, shares			21	14	17
Shares repurchased, value			728	472	527
June 2008 Program [Member]
Shares repurchased, shares			16	7	13
Shares repurchased, value			$ 550	$ 250	$ 400