Valuation And Qualifying Accounts (Details) (USD $) In Millions	12 Months Ended
	Jul. 31, 2011	Aug. 01, 2010	Aug. 02, 2009	Jul. 31, 2011 Cash Discount [Member]	Aug. 01, 2010 Cash Discount [Member]	Aug. 02, 2009 Cash Discount [Member]	Jul. 31, 2011 Bad Debt Reserve [Member]	Aug. 01, 2010 Bad Debt Reserve [Member]	Aug. 02, 2009 Bad Debt Reserve [Member]	Jul. 31, 2011 Returns Reserve [Member]		Aug. 01, 2010 Returns Reserve [Member]		Aug. 03, 2008 Returns Reserve [Member]
Balance at Beginning of Period	$ 17	$ 19	$ 21	$ 5	$ 5	$ 5	$ 4	$ 3	$ 5	$ 8	[1]	$ 11	[1]	$ 11	[1]
Charged to (Reduction In) Costs and Expenses	113	115	117	113	116	116	2	2	1	(2)	[1]	(3)	[1]
Deductions	(119)	(117)	(119)	(113)	(116)	(116)	(4)	(1)	(3)	(2)	[1]
Balance at End of Period	11	17	19	5	5	5	2	4	3	4	[1]	8	[1]	11	[1]
Actual returns	$ 145	$ 130	$ 140

[1] The returns reserve is evaluated quarterly and adjusted accordingly. During each period, returns are charged to net sales in the Consolidated Statements of Earnings as incurred. Actual returns were approximately $145 in 2011, $130 in 2010, and $140 in 2009, or less than 2% of net sales.