Segment Information (Additional Product Information For Net Sales) (Details) - USD ($) $ in Millions	3 Months Ended
	Oct. 28, 2018	Oct. 29, 2017
Segment Reporting Information [Line Items]
Net sales	$ 2,694	$ 2,161
Soup [Member]
Segment Reporting Information [Line Items]
Net sales	789	807
Snacks [Member]
Segment Reporting Information [Line Items]
Net sales	1,209	677
Other Simple Meals [Member]
Segment Reporting Information [Line Items]
Net sales	431	435
Beverages [Member]
Segment Reporting Information [Line Items]
Net sales	$ 265	$ 242