Goodwill And Intangible Assets (Intangible Assets) (Details) - USD ($) $ in Millions	Nov. 01, 2015	Aug. 02, 2015
Finite-Lived Intangible Assets [Line Items]
Finite-Lived Intangible Assets, Gross	$ 297	$ 297
Finite-Lived Intangible Assets, Accumulated Amortization	(57)	(52)
Finite-Lived Intangible Assets, Net	240	245
Indefinite-Lived Intangible Assets (Excluding Goodwill)	960	960
Total net intangible assets	1,200	1,205
Customer Relationships [Member]
Finite-Lived Intangible Assets [Line Items]
Finite-Lived Intangible Assets, Gross	222	222
Developed Technology Rights [Member]
Finite-Lived Intangible Assets [Line Items]
Finite-Lived Intangible Assets, Gross	40	40
Other Intangible Assets [Member]
Finite-Lived Intangible Assets [Line Items]
Finite-Lived Intangible Assets, Gross	$ 35	$ 35