Business And Geographic Segment Information Business And Geographic Segment Information (Schedule of Segment Reporting - Capital Expenditures) (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Jul. 29, 2012		Jul. 31, 2011		Aug. 01, 2010
Segment Reporting Information [Line Items]
Capital Expenditures	$ 323		$ 272		$ 315
U.S. Simple Meals [Member]
Segment Reporting Information [Line Items]
Capital Expenditures	97	[1]	126	[1]	139	[1]
Global Baking And Snacking [Member]
Segment Reporting Information [Line Items]
Capital Expenditures	126		73		81
International Simple Meals And Beverages [Member]
Segment Reporting Information [Line Items]
Capital Expenditures	46		36		26
North America Foodservice [Member]
Segment Reporting Information [Line Items]
Capital Expenditures	9		3		3
Corporate [Member]
Segment Reporting Information [Line Items]
Capital Expenditures	$ 45	[2]	$ 34	[2]	$ 66	[2]

[1] Capital expenditures are not maintained by segment.

[2] Represents primarily corporate offices.