Segment Information (Schedule Of Segment Reporting - Net Sales) (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jan. 28, 2018	Jan. 29, 2017	Jan. 28, 2018	Jan. 29, 2017
Segment Reporting Information [Line Items]
Net sales	$ 2,180	$ 2,171	$ 4,341	$ 4,373
Americas Simple Meals and Beverages [Member]
Segment Reporting Information [Line Items]
Net sales	1,196	1,215	2,414	2,493
Global Biscuits and Snacks [Member]
Segment Reporting Information [Line Items]
Net sales	726	696	1,435	1,386
Campbell Fresh [Member]
Segment Reporting Information [Line Items]
Net sales	257	260	491	494
Corporate, Non-Segment [Member]
Segment Reporting Information [Line Items]
Net sales	$ 1	$ 0	$ 1	$ 0