Business And Geographic Segment Information (Schedule Of Segment Reporting - Net Sales) (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Apr. 30, 2017	May 01, 2016	Apr. 30, 2017	May 01, 2016
Segment Reporting Information [Line Items]
Net sales	$ 1,853	$ 1,870	$ 6,226	$ 6,274
Americas Simple Meals and Beverages [Member]
Segment Reporting Information [Line Items]
Net sales	982	999	3,510	3,538
Global Biscuits and Snacks [Member]
Segment Reporting Information [Line Items]
Net sales	623	608	1,974	1,942
Campbell Fresh [Member]
Segment Reporting Information [Line Items]
Net sales	$ 248	$ 263	$ 742	$ 794