Goodwill And Intangible Assets (Goodwill) (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended				12 Months Ended
	Jul. 29, 2012	Jul. 31, 2011	Jul. 29, 2012 U.S. Simple Meals [Member]	Aug. 01, 2010 U.S. Simple Meals [Member]	Jul. 29, 2012 Global Baking And Snacking [Member]	Jul. 31, 2011 Global Baking And Snacking [Member]	Jul. 29, 2012 International Simple Meals And Beverages [Member]	Jul. 31, 2011 International Simple Meals And Beverages [Member]	Jul. 29, 2012 U.S. Beverages [Member]	Jul. 31, 2011 U.S. Beverages [Member]	Jul. 29, 2012 North America Foodservice [Member]	Jul. 31, 2011 North America Foodservice [Member]
Goodwill [Line Items]
Beginning Balance	$ 2,133	$ 1,919	$ 322	$ 322	$ 914	$ 754	$ 639	$ 585	$ 112	$ 112	$ 146	$ 146
Foreign currency translation adjustment	(120)	214			(42)	160	(78)	54
Ending Balance	$ 2,013	$ 2,133	$ 322	$ 322	$ 872	$ 914	$ 561	$ 639	$ 112	$ 112	$ 146	$ 146