Segment Information (Additional Product Information For Net Sales) (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jan. 27, 2019	Jan. 28, 2018	Jan. 27, 2019	Jan. 28, 2018
Segment Reporting Information [Line Items]
Net sales	$ 2,713	$ 2,180	$ 5,407	$ 4,341
Soup [Member]
Segment Reporting Information [Line Items]
Net sales	815	814	1,604	1,621
Snacks [Member]
Segment Reporting Information [Line Items]
Net sales	1,225	690	2,434	1,367
Other Simple Meals [Member]
Segment Reporting Information [Line Items]
Net sales	423	434	854	869
Beverages [Member]
Segment Reporting Information [Line Items]
Net sales	249	241	514	483
Other [Member]
Segment Reporting Information [Line Items]
Net sales	$ 1	$ 1	$ 1	$ 1