Segment Information (Additional Product Information For Net Sales) (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jan. 31, 2021	Jan. 26, 2020	Jan. 31, 2021	Jan. 26, 2020
Segment Reporting Information [Line Items]
Net sales	$ 2,279	$ 2,162	$ 4,619	$ 4,345
Soup [Member]
Segment Reporting Information [Line Items]
Net sales	794	755	1,620	1,463
Snacks [Member]
Segment Reporting Information [Line Items]
Net sales	989	955	1,997	1,965
Other Simple Meals [Member]
Segment Reporting Information [Line Items]
Net sales	307	279	618	562
Beverages [Member]
Segment Reporting Information [Line Items]
Net sales	$ 189	$ 173	$ 384	$ 355