Goodwill and Purchased Intangible Assets (Schedule Of Estimated Future Amortization Expense Of Purchased Intangible Assets) (Details) - USD ($) $ in Millions	Oct. 24, 2015	Jul. 25, 2015
Finite-Lived Intangible Assets, Future Amortization Expense [Abstract]
2016 (remaining nine months)	$ 574
2017	619
2018	476
2019	379
2020	162
Thereafter	53
Total purchased intangible assets with finite lives, net	$ 2,263	$ 2,359