Goodwill And Intangible Assets (Goodwill) (Details) - USD ($) $ in Millions	12 Months Ended
	Aug. 01, 2021	Aug. 02, 2020
Goodwill [Line Items]
Beginning Balance	$ 3,986	$ 4,017
Goodwill, Written off Related to Sale of Business Unit	(12)	(34)	[1]
Foreign currency translation adjustment	7	3
Ending Balance	3,981	3,986
Meals & Beverages [Member]
Goodwill [Line Items]
Beginning Balance	975	977
Goodwill, Written off Related to Sale of Business Unit	(12)	0	[1]
Foreign currency translation adjustment	7	(2)
Ending Balance	970	975
Snacks [Member]
Goodwill [Line Items]
Beginning Balance	3,011	3,040
Goodwill, Written off Related to Sale of Business Unit	0	(34)	[1]
Foreign currency translation adjustment	0	5
Ending Balance	$ 3,011	$ 3,011

[1] See Note 3 for additional information.