Business And Geographic Segment Information (Schedule Of Segment Reporting - Net Sales) (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended		6 Months Ended
	Jan. 27, 2013	Jan. 29, 2012	Jan. 27, 2013	Jan. 29, 2012
Segment Reporting Information [Line Items]
Net sales	$ 2,333	$ 2,112	$ 4,669	$ 4,273
U.S. Simple Meals [Member]
Segment Reporting Information [Line Items]
Net sales	833	824	1,729	1,698
Global Baking And Snacking [Member]
Segment Reporting Information [Line Items]
Net sales	561	526	1,135	1,094
International Simple Meals And Beverages [Member]
Segment Reporting Information [Line Items]
Net sales	405	402	759	761
U.S. Beverages [Member]
Segment Reporting Information [Line Items]
Net sales	182	187	371	385
Bolthouse and Foodservice [Member]
Segment Reporting Information [Line Items]
Net sales	$ 352	$ 173	$ 675	$ 335