Goodwill And Intangible Assets (Goodwill) (Details) $ in Millions	9 Months Ended
	Apr. 26, 2020 USD ($)
Goodwill [Line Items]
Beginning Balance	$ 4,017
Goodwill, Written off Related to Sale of Business Unit	(34)	[1]
Foreign currency translation adjustment	(2)
Ending Balance	3,981
Meals & Beverages [Member]
Goodwill [Line Items]
Beginning Balance	977
Goodwill, Written off Related to Sale of Business Unit	0	[1]
Foreign currency translation adjustment	(6)
Ending Balance	971
Snacks [Member]
Goodwill [Line Items]
Beginning Balance	3,040
Goodwill, Written off Related to Sale of Business Unit	(34)	[1]
Foreign currency translation adjustment	4
Ending Balance	$ 3,010

[1] On October 11, 2019, we completed the sale of our European chips business. See Note 3 for additional information.