Goodwill And Intangible Assets (Intangible Assets) (Details) (USD $) In Millions, unless otherwise specified	Aug. 03, 2014	Jul. 28, 2013
Finite-Lived Intangible Assets [Line Items]
Finite-Lived Intangible Assets, Gross	$ 253	$ 228
Finite-Lived Intangible Assets, Accumulated Amortization	(35)	(17)
Finite-Lived Intangible Assets, Net	218	211
Indefinite-Lived Intangible Assets (Excluding Goodwill)	957	810
Total net intangible assets	1,175	1,021
Customer Relationships [Member]
Finite-Lived Intangible Assets [Line Items]
Finite-Lived Intangible Assets, Gross	178	156
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	$ 32