Goodwill, Purchased Technology and Other Intangible Assets (Purchased Technology and Intangible Assets) (Details) - USD ($) $ in Millions	Oct. 25, 2015	Oct. 26, 2014
Summary of Purchased Technology and Intangible Assets [Line Items]
Carrying amount	$ 737	$ 824
Intangible assets - indefinite-lived	25	127
Total	762	951
Purchased Technology
Summary of Purchased Technology and Intangible Assets [Line Items]
Carrying amount	575	636
Intangible Assets
Summary of Purchased Technology and Intangible Assets [Line Items]
Carrying amount	$ 162	$ 188