Goodwill And Intangible Assets (Goodwill) (Details) - USD ($) $ in Millions	3 Months Ended	12 Months Ended
	Oct. 28, 2018	Jul. 28, 2019	Jul. 29, 2018
Goodwill [Line Items]
Beginning Balance	$ 3,864	$ 3,864	$ 811
Goodwill, Purchase Accounting Adjustments		140
Goodwill, Acquired During Period		21	3,068
Foreign currency translation adjustment		(8)	(15)
Ending Balance		4,017	3,864
Meals & Beverages [Member]
Goodwill [Line Items]
Beginning Balance	978	978	780
Goodwill, Purchase Accounting Adjustments		0
Goodwill, Acquired During Period		0	202
Foreign currency translation adjustment		(1)	(4)
Ending Balance		977	978
Snacks [Member]
Goodwill [Line Items]
Beginning Balance	2,886	2,886	31
Goodwill, Purchase Accounting Adjustments	$ 140
Goodwill, Acquired During Period			2,866
Foreign currency translation adjustment		(7)	(11)
Ending Balance		$ 3,040	$ 2,886