Business And Geographic Segment Information (Additional Product Information For Net Sales) (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	May. 01, 2016	May. 03, 2015	May. 01, 2016	May. 03, 2015
Segment Reporting Information [Line Items]
Net sales	$ 1,870	$ 1,900	$ 6,274	$ 6,389
Soup [Member]
Segment Reporting Information [Line Items]
Net sales	575	602	2,253	2,361
Baked Snacks [Member]
Segment Reporting Information [Line Items]
Net sales	584	587	1,886	1,919
Other Simple Meals [Member]
Segment Reporting Information [Line Items]
Net sales	424	409	1,300	1,251
Beverages [Member]
Segment Reporting Information [Line Items]
Net sales	$ 287	$ 302	$ 835	$ 858