Cash, Cash Equivalents and Investments (Details 2) (USD $) In Millions	3 Months Ended		6 Months Ended
	May 01, 2011	May 02, 2010	May 01, 2011	May 02, 2010
Gains and Losses on Investments
Gross realized gains on investments	$ 8	$ 2	$ 13	$ 2
Gross realized losses on investments	$ 1		$ 1	$ 1