Goodwill And Intangible Assets (Intangible Assets) (Details) (USD $) In Millions, unless otherwise specified	Nov. 02, 2014	Aug. 03, 2014
Finite-Lived Intangible Assets [Line Items]
Finite-Lived Intangible Assets, Gross	$ 252	$ 253
Finite-Lived Intangible Assets, Accumulated Amortization	(39)	(35)
Finite-Lived Intangible Assets, Net	213	218
Indefinite-Lived Intangible Assets (Excluding Goodwill)	947	957
Total net intangible assets	1,160	1,175
Customer Relationships [Member]
Finite-Lived Intangible Assets [Line Items]
Finite-Lived Intangible Assets, Gross	177	178
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