Goodwill, Purchased Technology and Other Intangible Assets (Schedule of Purchased Technology and Intangible Assets) (Details) (USD $) In Millions, unless otherwise specified	Apr. 26, 2015	Oct. 26, 2014
Summary of Purchased Technology and Intangible Assets [Line Items]
Carrying amount	$ 731	$ 824
Intangible assets - indefinite-lived	129	127
Total	860	951
Purchased technology [Member]
Summary of Purchased Technology and Intangible Assets [Line Items]
Carrying amount	557	636
Intangible assets [Member]
Summary of Purchased Technology and Intangible Assets [Line Items]
Carrying amount	$ 174	$ 188