Goodwill And Intangible Assets (Intangible Assets) (Details) (USD $) In Millions, unless otherwise specified	Oct. 27, 2013	Jul. 28, 2013
Finite-Lived Intangible Assets [Line Items]
Indefinite-Lived Trademarks	$ 961	$ 810
Amortizable intangible assets	255	228
Accumulated amortization	(22)	(17)
Total net intangible assets	1,194	1,021
Customer Relationships [Member]
Finite-Lived Intangible Assets [Line Items]
Amortizable intangible assets	179	156
Developed Technology Rights [Member]
Finite-Lived Intangible Assets [Line Items]
Amortizable intangible assets	40	40
Other Intangible Assets [Member]
Finite-Lived Intangible Assets [Line Items]
Amortizable intangible assets	$ 36	$ 32