Business And Geographic Segment Information (Schedule Of Segment Reporting - Earnings Before Interest And Taxes) (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]
Earnings before interest and taxes	$ 264	$ 307	$ 1,009	$ 1,110
U.S. Simple Meals [Member]
Segment Reporting Information [Line Items]
Earnings before interest and taxes	120	139	554	556
Global Baking And Snacking [Member]
Segment Reporting Information [Line Items]
Earnings before interest and taxes	73	82	232	263
International Simple Meals And Beverages [Member]
Segment Reporting Information [Line Items]
Earnings before interest and taxes	37	41	138	161
U.S. Beverages [Member]
Segment Reporting Information [Line Items]
Earnings before interest and taxes	45	54	109	152
North America Foodservice [Member]
Segment Reporting Information [Line Items]
Earnings before interest and taxes	20	22	75	66
Corporate [Member]
Segment Reporting Information [Line Items]
Earnings before interest and taxes	(27)	(31)	(90)	(88)
Restructuring Charges [Member]
Segment Reporting Information [Line Items]
Earnings before interest and taxes	$ (4)	$ 0	$ (9)	$ 0