Business And Geographic Segment Information (Additional Product Information For Net Sales) (Details) - USD ($) $ in Millions	3 Months Ended								12 Months Ended
	Jul. 31, 2016	May 01, 2016	Jan. 31, 2016	Nov. 01, 2015	Aug. 02, 2015	May 03, 2015	Feb. 01, 2015	Nov. 02, 2014	Jul. 31, 2016	Aug. 02, 2015	Aug. 03, 2014
Segment Reporting Information [Line Items]
Net sales	$ 1,687	$ 1,870	$ 2,201	$ 2,203	$ 1,693	$ 1,900	$ 2,234	$ 2,255	$ 7,961	$ 8,082	$ 8,268
Soup [Member]
Segment Reporting Information [Line Items]
Net sales									2,690	2,798	2,891
Baked Snacks [Member]
Segment Reporting Information [Line Items]
Net sales									2,479	2,502	2,571
Other Simple Meals [Member]
Segment Reporting Information [Line Items]
Net sales									1,702	1,648	1,620
Beverages [Member]
Segment Reporting Information [Line Items]
Net sales									$ 1,090	$ 1,134	$ 1,186