Business And Geographic Segment Information (Additional Product Information For 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
Soup [Member]
Segment Reporting Information [Line Items]
Net sales	2,568	2,653	2,368
Snacks [Member]
Segment Reporting Information [Line Items]
Net sales	3,989	4,099	3,918
Other Simple Meals [Member]
Segment Reporting Information [Line Items]
Net sales	1,134	1,184	1,082
Beverages [Member]
Segment Reporting Information [Line Items]
Net sales	785	755	738
Other [Member]
Segment Reporting Information [Line Items]
Net sales	$ 0	$ 0	$ 1