Goodwill, Purchased Technology and Other Intangible Assets (Details) (USD $) In Millions, unless otherwise specified	Jan. 27, 2013	Oct. 28, 2012
Summary of Purchased Technology and Intangible Assets [Line Items]
Carrying amount	$ 1,160	$ 1,213
Intangible assets - indefinite-lived	142	142
Total	1,302	1,355
Purchased technology, net [Member]
Summary of Purchased Technology and Intangible Assets [Line Items]
Carrying amount	903	945
Intangible assets [Member]
Summary of Purchased Technology and Intangible Assets [Line Items]
Carrying amount	$ 257	$ 268