Business And Geographic Segment Information (Schedule Of Segment Reporting - Net Sales) (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jan. 29, 2017	Jan. 31, 2016	Jan. 29, 2017	Jan. 31, 2016
Segment Reporting Information [Line Items]
Net sales	$ 2,171	$ 2,201	$ 4,373	$ 4,404
Americas Simple Meals and Beverages [Member]
Segment Reporting Information [Line Items]
Net sales	1,231	1,237	2,528	2,539
Global Biscuits and Snacks [Member]
Segment Reporting Information [Line Items]
Net sales	680	682	1,351	1,334
Campbell Fresh [Member]
Segment Reporting Information [Line Items]
Net sales	$ 260	$ 282	$ 494	$ 531