Balance Sheet Detail (Details 3) (USD $) In Millions, unless otherwise specified	Jul. 29, 2012		Oct. 30, 2011
Customer Deposits and Deferred Revenue
Customer deposits	$ 229		$ 249
Deferred revenue	708		867
Total Customer Deposits and Deferred Revenue	$ 937	[1]	$ 1,116	[1]

[1] Amounts as of July 29, 2012 are unaudited. Amounts as of October 30, 2011 are derived from the October 30, 2011 audited consolidated financial statements.