Segment Information (Additional Product Information For Net Sales) (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jan. 26, 2020	Jan. 27, 2019	Jan. 26, 2020	Jan. 27, 2019
Segment Reporting Information [Line Items]
Net sales	$ 2,162	$ 2,172	$ 4,345	$ 4,374
Soup [Member]
Segment Reporting Information [Line Items]
Net sales	755	757	1,463	1,492
Snacks [Member]
Segment Reporting Information [Line Items]
Net sales	955	963	1,965	1,955
Other Simple Meals [Member]
Segment Reporting Information [Line Items]
Net sales	279	272	562	559
Beverages [Member]
Segment Reporting Information [Line Items]
Net sales	173	179	355	367
Other [Member]
Segment Reporting Information [Line Items]
Net sales	$ 0	$ 1	$ 0	$ 1