Business And Geographic Segment Information (Schedule Of Segment Reporting - Net Sales) (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended		9 Months Ended
	Apr. 29, 2012	May 01, 2011	Apr. 29, 2012	May 01, 2011
Segment Reporting Information [Line Items]
Net sales	$ 1,821	$ 1,813	$ 6,094	$ 6,112
U.S. Simple Meals [Member]
Segment Reporting Information [Line Items]
Net sales	567	580	2,265	2,320
Global Baking And Snacking [Member]
Segment Reporting Information [Line Items]
Net sales	543	527	1,637	1,597
International Simple Meals And Beverages [Member]
Segment Reporting Information [Line Items]
Net sales	349	354	1,110	1,147
U.S. Beverages [Member]
Segment Reporting Information [Line Items]
Net sales	208	198	593	583
North America Foodservice [Member]
Segment Reporting Information [Line Items]
Net sales	$ 154	$ 154	$ 489	$ 465