Goodwill And Intangible Assets (Intangible Assets) (Details) - USD ($) $ in Millions	Aug. 02, 2020	Jul. 28, 2019
Finite-Lived Intangible Assets [Line Items]
Finite-Lived Intangible Assets, Gross	$ 865	$ 869
Finite-Lived Intangible Assets, Accumulated Amortization	(126)	(83)
Finite-Lived Intangible Assets, Net	739	786
Indefinite-lived Intangible Assets (Excluding Goodwill)	2,611	2,629
Total net intangible assets	3,350	3,415
Customer Relationships [Member]
Finite-Lived Intangible Assets [Line Items]
Finite-Lived Intangible Assets, Gross	851	855
Finite-Lived Intangible Assets, Accumulated Amortization	(112)	(70)
Finite-Lived Intangible Assets, Net	739	785
Other Intangible Assets [Member]
Finite-Lived Intangible Assets [Line Items]
Finite-Lived Intangible Assets, Gross	14	14
Finite-Lived Intangible Assets, Accumulated Amortization	(14)	(13)
Finite-Lived Intangible Assets, Net	$ 0	$ 1