Business And Geographic Segment Information (Schedule Of Segment Reporting - Net Sales) (Details) - USD ($) $ in Millions	12 Months Ended
	Aug. 01, 2021	Aug. 02, 2020	Jul. 28, 2019
Segment Reporting Information [Line Items]
Net sales	$ 8,476	$ 8,691	$ 8,107
Meals & Beverages [Member]
Segment Reporting Information [Line Items]
Net sales	4,532	4,646	4,252
Snacks [Member]
Segment Reporting Information [Line Items]
Net sales	3,944	4,045	3,854
Corporate and Other
Segment Reporting Information [Line Items]
Net sales	$ 0	$ 0	$ 1