Goodwill and Purchased Intangible Assets (Additional Information) (Details) - USD ($) $ in Millions	12 Months Ended
	Jul. 30, 2016	Jul. 25, 2015	Jul. 26, 2014
Finite-Lived Intangible Assets [Line Items]
Impairment of Intangible assets	$ 74	$ 175	$ 0
Cost of Goods Sold	$ 14,161	15,377	$ 15,641
Rockstar Consortium [Member]
Finite-Lived Intangible Assets [Line Items]
Settlement of patent infringement claims		300
Cost of Goods Sold		$ 188