Business And Geographic Segment Information (Schedule Of Segment Reporting - 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
Americas Simple Meals and Beverages [Member]
Segment Reporting Information [Line Items]
Net sales									4,213	4,256	4,313
Global Biscuits and Snacks [Member]
Segment Reporting Information [Line Items]
Net sales									3,499	2,667	2,631
Campbell Fresh [Member]
Segment Reporting Information [Line Items]
Net sales									970	967	1,017
Corporate, Non-Segment [Member]
Segment Reporting Information [Line Items]
Net sales									$ 3	$ 0	$ 0