Goodwill And Intangible Assets (Goodwill) (Details) $ in Millions	3 Months Ended
	Oct. 27, 2019 USD ($)
Goodwill [Line Items]
Beginning Balance	$ 4,017
Goodwill, Written off Related to Sale of Business Unit	(34)	[1]
Foreign currency translation adjustment	5
Ending Balance	3,988
Meals & Beverages [Member]
Goodwill [Line Items]
Beginning Balance	977
Goodwill, Written off Related to Sale of Business Unit	0	[1]
Foreign currency translation adjustment	1
Ending Balance	978
Snacks [Member]
Goodwill [Line Items]
Beginning Balance	3,040
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.