Segment Information (Schedule Of Segment Reporting - Net Sales) (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Apr. 29, 2018	Apr. 30, 2017	Apr. 29, 2018	Apr. 30, 2017
Segment Reporting Information [Line Items]
Net sales	$ 2,125	$ 1,853	$ 6,466	$ 6,226
Americas Simple Meals and Beverages [Member]
Segment Reporting Information [Line Items]
Net sales	1,010	966	3,424	3,459
Global Biscuits and Snacks [Member]
Segment Reporting Information [Line Items]
Net sales	862	639	2,297	2,025
Campbell Fresh [Member]
Segment Reporting Information [Line Items]
Net sales	251	248	742	742
Corporate, Non-Segment [Member]
Segment Reporting Information [Line Items]
Net sales	$ 2	$ 0	$ 3	$ 0