Segment Information (Schedule Of Segment Reporting - Net Sales) (Details) - USD ($) $ in Millions	3 Months Ended
	Oct. 29, 2017	Oct. 30, 2016
Segment Reporting Information [Line Items]
Net sales	$ 2,161	$ 2,202
Americas Simple Meals and Beverages [Member]
Segment Reporting Information [Line Items]
Net sales	1,218	1,278
Global Biscuits and Snacks [Member]
Segment Reporting Information [Line Items]
Net sales	709	690
Campbell Fresh [Member]
Segment Reporting Information [Line Items]
Net sales	$ 234	$ 234