Segment Information (Additional Product Information For 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
Soup [Member]
Segment Reporting Information [Line Items]
Net sales	596	557	2,217	2,251
Snacks [Member]
Segment Reporting Information [Line Items]
Net sales	821	600	2,188	1,914
Other Simple Meals [Member]
Segment Reporting Information [Line Items]
Net sales	429	434	1,298	1,299
Beverages [Member]
Segment Reporting Information [Line Items]
Net sales	277	262	760	762
Other [Member]
Segment Reporting Information [Line Items]
Net sales	$ 2	$ 0	$ 3	$ 0