Goodwill And Intangible Assets (Goodwill) (Details) - USD ($) $ in Millions		12 Months Ended
		Aug. 02, 2020	Jul. 28, 2019
Goodwill [Line Items]
Beginning Balance		$ 4,017	$ 3,864
Goodwill, Purchase Accounting Adjustments			140
Goodwill, Acquired During Period	[1]		21
Goodwill, Written off Related to Sale of Business Unit	[2]	(34)
Foreign currency translation adjustment		3	(8)
Ending Balance		3,986	4,017
Meals & Beverages [Member]
Goodwill [Line Items]
Beginning Balance		977	978
Goodwill, Purchase Accounting Adjustments			0
Goodwill, Acquired During Period	[1]		0
Goodwill, Written off Related to Sale of Business Unit	[2]	0
Foreign currency translation adjustment		(2)	(1)
Ending Balance		975	977
Snacks [Member]
Goodwill [Line Items]
Beginning Balance		3,040	2,886
Goodwill, Purchase Accounting Adjustments			140
Goodwill, Acquired During Period	[1]		21
Goodwill, Written off Related to Sale of Business Unit	[2]	(34)
Foreign currency translation adjustment		5	(7)
Ending Balance		$ 3,011	$ 3,040

[1] See Note 4 for additional information.

[2] See Note 3 for additional information.