Business And Geographic Segment Information (Schedule Of Segment Reporting - Net Sales) (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended
	Oct. 28, 2012	Oct. 30, 2011
Segment Reporting Information [Line Items]
Net sales	$ 2,336	$ 2,161
U.S. Simple Meals [Member]
Segment Reporting Information [Line Items]
Net sales	896	874
Global Baking And Snacking [Member]
Segment Reporting Information [Line Items]
Net sales	574	568
International Simple Meals And Beverages [Member]
Segment Reporting Information [Line Items]
Net sales	354	359
U.S. Beverages [Member]
Segment Reporting Information [Line Items]
Net sales	189	198
Bolthouse and Foodservice [Member]
Segment Reporting Information [Line Items]
Net sales	$ 323	$ 162