Goodwill And Intangible Assets (Goodwill) (Details) (USD $) In Millions, unless otherwise specified	9 Months Ended
	Apr. 29, 2012
Goodwill [Line Items]
Beginning Balance	$ 2,133
Foreign currency translation adjustment	(86)
Ending Balance	2,047
U.S. Simple Meals [Member]
Goodwill [Line Items]
Beginning Balance	322
Foreign currency translation adjustment	0
Ending Balance	322
Global Baking And Snacking [Member]
Goodwill [Line Items]
Beginning Balance	914
Foreign currency translation adjustment	(43)
Ending Balance	871
International Simple Meals And Beverages [Member]
Goodwill [Line Items]
Beginning Balance	639
Foreign currency translation adjustment	(43)
Ending Balance	596
U.S. Beverages [Member]
Goodwill [Line Items]
Beginning Balance	112
Foreign currency translation adjustment	0
Ending Balance	112
North America Foodservice [Member]
Goodwill [Line Items]
Beginning Balance	146
Foreign currency translation adjustment	0
Ending Balance	$ 146