Business And Geographic Segment Information (Schedule Of Segment Reporting - Earnings Before Interest And Taxes) (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended		6 Months Ended
	Jan. 29, 2012	Jan. 30, 2011	Jan. 29, 2012	Jan. 30, 2011
Segment Reporting Information [Line Items]
Earnings before interest and taxes	$ 329	$ 359	$ 745	$ 803
U.S. Simple Meals [Member]
Segment Reporting Information [Line Items]
Earnings before interest and taxes	174	177	434	417
Global Baking And Snacking [Member]
Segment Reporting Information [Line Items]
Earnings before interest and taxes	71	81	159	181
International Simple Meals And Beverages [Member]
Segment Reporting Information [Line Items]
Earnings before interest and taxes	58	69	101	120
U.S. Beverages [Member]
Segment Reporting Information [Line Items]
Earnings before interest and taxes	34	43	64	98
North America Foodservice [Member]
Segment Reporting Information [Line Items]
Earnings before interest and taxes	28	21	55	44
Corporate [Member]
Segment Reporting Information [Line Items]
Earnings before interest and taxes	(33)	(32)	(63)	(57)
Restructuring Charges [Member]
Segment Reporting Information [Line Items]
Earnings before interest and taxes	$ (3)	$ 0	$ (5)	$ 0