Fair Value Measurements (Details) (USD $) In Millions	Jul. 31, 2011	Oct. 31, 2010	Aug. 01, 2010
Assets:
Equity investments in privately-held companies measured at fair value on a non-recurring basis	$ 22	$ 19	$ 23
Fair Value, Measurements, Recurring [Member]
Assets:
Foreign exchange derivative assets	2	6
Total	5,832	3,138
Liabilities
Foreign exchange derivative liabilities	(4)	(1)
Total	(4)	(1)
Fair Value, Measurements, Recurring [Member] | Level 1 [Member]
Assets:
Foreign exchange derivative assets	0	0
Total	4,040	1,317
Liabilities
Foreign exchange derivative liabilities	0	0
Total	0	0
Fair Value, Measurements, Recurring [Member] | Level 1 [Member] | Money market funds [Member]
Assets:
Equity investments in privately-held companies measured at fair value on a non-recurring basis	3,895	1,139
Fair Value, Measurements, Recurring [Member] | Level 1 [Member] | US Treasury and agency securities [Member]
Assets:
Equity investments in privately-held companies measured at fair value on a non-recurring basis	116	153
Fair Value, Measurements, Recurring [Member] | Level 1 [Member] | U.S. commercial paper, corporate bonds and medium-term notes [Member]
Assets:
Equity investments in privately-held companies measured at fair value on a non-recurring basis	0	0
Fair Value, Measurements, Recurring [Member] | Level 1 [Member] | Obligations of states and political subdivisions [Member]
Assets:
Equity investments in privately-held companies measured at fair value on a non-recurring basis	0	0
Fair Value, Measurements, Recurring [Member] | Level 1 [Member] | Other debt securities [Member]
Assets:
Equity investments in privately-held companies measured at fair value on a non-recurring basis	0	0
Fair Value, Measurements, Recurring [Member] | Level 1 [Member] | Publicly traded equity securities [Member]
Assets:
Equity investments in privately-held companies measured at fair value on a non-recurring basis	29	25
Fair Value, Measurements, Recurring [Member] | Level 2 [Member]
Assets:
Foreign exchange derivative assets	2	6
Total	1,792	1,821
Liabilities
Foreign exchange derivative liabilities	(4)	(1)
Total	(4)	(1)
Fair Value, Measurements, Recurring [Member] | Level 2 [Member] | Money market funds [Member]
Assets:
Equity investments in privately-held companies measured at fair value on a non-recurring basis	0	0
Fair Value, Measurements, Recurring [Member] | Level 2 [Member] | US Treasury and agency securities [Member]
Assets:
Equity investments in privately-held companies measured at fair value on a non-recurring basis	370	520
Fair Value, Measurements, Recurring [Member] | Level 2 [Member] | U.S. commercial paper, corporate bonds and medium-term notes [Member]
Assets:
Equity investments in privately-held companies measured at fair value on a non-recurring basis	585	509
Fair Value, Measurements, Recurring [Member] | Level 2 [Member] | Obligations of states and political subdivisions [Member]
Assets:
Equity investments in privately-held companies measured at fair value on a non-recurring basis	470	523
Fair Value, Measurements, Recurring [Member] | Level 2 [Member] | Other debt securities [Member]
Assets:
Equity investments in privately-held companies measured at fair value on a non-recurring basis	365	263
Fair Value, Measurements, Recurring [Member] | Level 2 [Member] | Publicly traded equity securities [Member]
Assets:
Equity investments in privately-held companies measured at fair value on a non-recurring basis	0	0
Fair Value, Measurements, Recurring [Member] | Level 3 [Member]
Assets:
Foreign exchange derivative assets	0	0
Total	0	0
Liabilities
Foreign exchange derivative liabilities	0	0
Total	0	0
Fair Value, Measurements, Recurring [Member] | Level 3 [Member] | Money market funds [Member]
Assets:
Equity investments in privately-held companies measured at fair value on a non-recurring basis	0	0
Fair Value, Measurements, Recurring [Member] | Level 3 [Member] | US Treasury and agency securities [Member]
Assets:
Equity investments in privately-held companies measured at fair value on a non-recurring basis	0	0
Fair Value, Measurements, Recurring [Member] | Level 3 [Member] | U.S. commercial paper, corporate bonds and medium-term notes [Member]
Assets:
Equity investments in privately-held companies measured at fair value on a non-recurring basis	0	0
Fair Value, Measurements, Recurring [Member] | Level 3 [Member] | Obligations of states and political subdivisions [Member]
Assets:
Equity investments in privately-held companies measured at fair value on a non-recurring basis	0	0
Fair Value, Measurements, Recurring [Member] | Level 3 [Member] | Other debt securities [Member]
Assets:
Equity investments in privately-held companies measured at fair value on a non-recurring basis	0	0
Fair Value, Measurements, Recurring [Member] | Level 3 [Member] | Publicly traded equity securities [Member]
Assets:
Equity investments in privately-held companies measured at fair value on a non-recurring basis	0	0
Fair Value, Measurements, Recurring [Member] | Money market funds [Member]
Assets:
Equity investments in privately-held companies measured at fair value on a non-recurring basis	3,895	1,139
Fair Value, Measurements, Recurring [Member] | US Treasury and agency securities [Member]
Assets:
Equity investments in privately-held companies measured at fair value on a non-recurring basis	486	673
Fair Value, Measurements, Recurring [Member] | U.S. commercial paper, corporate bonds and medium-term notes [Member]
Assets:
Equity investments in privately-held companies measured at fair value on a non-recurring basis	585	509
Fair Value, Measurements, Recurring [Member] | Obligations of states and political subdivisions [Member]
Assets:
Equity investments in privately-held companies measured at fair value on a non-recurring basis	470	523
Fair Value, Measurements, Recurring [Member] | Other debt securities [Member]
Assets:
Equity investments in privately-held companies measured at fair value on a non-recurring basis	365	263
Fair Value, Measurements, Recurring [Member] | Publicly traded equity securities [Member]
Assets:
Equity investments in privately-held companies measured at fair value on a non-recurring basis	$ 29	$ 25