Cash, Cash Equivalents and Investments (Details Textual) (USD $) In Millions, unless otherwise specified	3 Months Ended	6 Months Ended
Apr. 29, 2012	May 01, 2011	Apr. 29, 2012	May 01, 2011
Cash and Cash Equivalents [Abstract]
Gross unrealized loss due to a decrease in the fair value of certain fixed income securities	$ 1		$ 1
Impairments of investments	$ 3	$ 0	$ 3	$ 0

The amount by which the fair value of an investment is less than the amortized cost basis or carrying amount of that investment at the balance sheet date and the decline in fair value is deemed to be other than temporary, before considering whether or not such amount is recognized in earnings or other comprehensive income.

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Reference 3: http://www.xbrl.org/2003/role/presentationRef

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Reference 5: http://www.xbrl.org/2003/role/presentationRef

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