Goodwill And Intangible Assets (Goodwill) (Details) (USD $) In Millions	12 Months Ended
	Jul. 31, 2011	Aug. 01, 2010
Beginning Balance	$ 1,919	$ 1,901
Foreign currency translation adjustment	214	18
Ending Balance	2,133	1,919
U.S. Simple Meals [Member]
Beginning Balance	322	322
Foreign currency translation adjustment
Ending Balance	322	322
U.S. Beverages [Member]
Beginning Balance	112	112
Foreign currency translation adjustment
Ending Balance	112	112
Global Baking And Snacking [Member]
Beginning Balance	754	700
Foreign currency translation adjustment	160	54
Ending Balance	914	754
International Simple Meals And Beverages [Member]
Beginning Balance	585	621
Foreign currency translation adjustment	54	(36)
Ending Balance	639	585
North America Foodservice [Member]
Beginning Balance	146	146
Foreign currency translation adjustment
Ending Balance	$ 146	$ 146