Business And Geographic Segment Information (Schedule Of Segment Reporting - Net Sales) (Details) (USD $) In Millions	3 Months Ended								12 Months Ended
	Jul. 31, 2011	May 01, 2011	Jan. 30, 2011	Oct. 31, 2010	Aug. 01, 2010	May 02, 2010	Jan. 31, 2010	Nov. 01, 2009	Jul. 31, 2011	Aug. 01, 2010	Aug. 02, 2009
Net sales	$ 1,607	$ 1,813	$ 2,127	$ 2,172	$ 1,518	$ 1,802	$ 2,153	$ 2,203	$ 7,719	$ 7,676	$ 7,586
U.S. Simple Meals [Member]
Net sales									2,751	2,938	3,049
U.S. Beverages [Member]
Net sales									759	762	735
Global Baking And Snacking [Member]
Net sales									2,156	1,975	1,846
International Simple Meals And Beverages [Member]
Net sales									1,463	1,423	1,357
North America Foodservice [Member]
Net sales									$ 590	$ 578	$ 599