Segment Information (Schedule Of Segment Reporting - 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
Meals & Beverages [Member]
Segment Reporting Information [Line Items]
Net sales	1,224	1,222	2,418	2,451
Snacks [Member]
Segment Reporting Information [Line Items]
Net sales	938	949	1,927	1,922
Corporate, Non-Segment [Member]
Segment Reporting Information [Line Items]
Net sales	$ 0	$ 1	$ 0	$ 1