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Fair Value Measurements (Details 1) (USD $) In Millions	3 Months Ended		9 Months Ended
Fair Value Measurements (Details 1) (USD $) In Millions	Jul. 31, 2011	Aug. 01, 2010	Jul. 31, 2011	Aug. 01, 2010	Oct. 31, 2010
Impairment charges
Equity investments in privately-held companies measured at fair value on a non-recurring basis	$ 22	$ 23	$ 22	$ 23	$ 19
Impairment of equity method investment in privately-held companies measured at fair value on a non-recurring basis	0	8	0	13
Level 1 [Member] \| Fair Value, Measurements, Nonrecurring [Member]
Impairment charges
Equity investments in privately-held companies measured at fair value on a non-recurring basis	0	0	0	0
Level 2 [Member] \| Fair Value, Measurements, Nonrecurring [Member]
Impairment charges
Equity investments in privately-held companies measured at fair value on a non-recurring basis	0	0	0	0
Level 3 [Member] \| Fair Value, Measurements, Nonrecurring [Member]
Impairment charges
Equity investments in privately-held companies measured at fair value on a non-recurring basis	$ 22	$ 23	$ 22	$ 23

This element represents the portion of the balance sheet assertion valued at fair value by the entity whether such amount is presented as a separate caption or as a parenthetical disclosure. Additionally, this element may be used in connection with the fair value disclosures required in the footnote disclosures to the financial statements. The element may be used in both the balance sheet and disclosure in the same submission. This item represents investment securities as of the balance sheet date which may include marketable securities, derivative financial instruments, and investments accounted for under the equity method.

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