Business And Geographic Segment Information (Additional Product Information For Net Sales) (Details) - USD ($) $ in Millions	3 Months Ended								12 Months Ended
	Jul. 29, 2018	Apr. 29, 2018	Jan. 28, 2018	Oct. 29, 2017	Jul. 30, 2017	Apr. 30, 2017	Jan. 29, 2017	Oct. 30, 2016	Jul. 29, 2018	Jul. 30, 2017	Jul. 31, 2016
Segment Reporting Information [Line Items]
Net sales	$ 2,219	$ 2,125	$ 2,180	$ 2,161	$ 1,664	$ 1,853	$ 2,171	$ 2,202	$ 8,685	$ 7,890	$ 7,961
Soup [Member]
Segment Reporting Information [Line Items]
Net sales									2,615	2,673	2,690
Snacks [Member]
Segment Reporting Information [Line Items]
Net sales									3,344	2,511	2,479
Other Simple Meals [Member]
Segment Reporting Information [Line Items]
Net sales									1,699	1,698	1,702
Beverages [Member]
Segment Reporting Information [Line Items]
Net sales									1,024	1,008	1,090
Other [Member]
Segment Reporting Information [Line Items]
Net sales									$ 3	$ 0	$ 0