Goodwill, Purchased Technology and Other Intangible Assets (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended				9 Months Ended																9 Months Ended														6 Months Ended					6 Months Ended
	Jul. 31, 2011		May 01, 2011	Aug. 01, 2010	Jul. 31, 2011		Aug. 01, 2010	Jan. 30, 2011	Oct. 31, 2010		Jul. 31, 2011 Purchased Technology [Member] Silicon Systems Group [Member]	Oct. 31, 2010 Purchased Technology [Member] Silicon Systems Group [Member]	Jul. 31, 2011 Other Intangible Assets [Member] Silicon Systems Group [Member]	Oct. 31, 2010 Other Intangible Assets [Member] Silicon Systems Group [Member]	Jul. 31, 2011 Silicon Systems Group [Member]	Oct. 31, 2010 Silicon Systems Group [Member]	Jul. 31, 2011 Purchased Technology [Member] Applied Global Services [Member]	Oct. 31, 2010 Purchased Technology [Member] Applied Global Services [Member]	Jul. 31, 2011 Other Intangible Assets [Member] Applied Global Services [Member]	Oct. 31, 2010 Other Intangible Assets [Member] Applied Global Services [Member]	Jul. 31, 2011 Applied Global Services [Member]	Oct. 31, 2010 Applied Global Services [Member]	Jul. 31, 2011 Purchased Technology [Member] Display [Member]	Oct. 31, 2010 Purchased Technology [Member] Display [Member]	Jul. 31, 2011 Other Intangible Assets [Member] Display [Member]	Oct. 31, 2010 Other Intangible Assets [Member] Display [Member]	Jul. 31, 2011 Display [Member]	Oct. 31, 2010 Display [Member]	Jul. 31, 2011 Purchased Technology [Member] Energy and Environmental Solutions [Member]	Oct. 31, 2010 Purchased Technology [Member] Energy and Environmental Solutions [Member]	Jul. 31, 2011 Other Intangible Assets [Member] Energy and Environmental Solutions [Member]	Oct. 31, 2010 Other Intangible Assets [Member] Energy and Environmental Solutions [Member]	Jul. 31, 2011 Energy and Environmental Solutions [Member]	Oct. 31, 2010 Energy and Environmental Solutions [Member]	May 01, 2011 Purchased Technology [Member]	Jul. 31, 2011 Purchased Technology [Member]	Oct. 31, 2010 Purchased Technology [Member]	Jul. 31, 2011 Other Intangible Assets [Member]	Oct. 31, 2010 Other Intangible Assets [Member]	May 01, 2011 Trade Names [Member]
Indefinite-lived intangible assets
Goodwill	$ 1,335	[1]			$ 1,335	[1]			$ 1,336	[1]					$ 381	$ 381					$ 193	$ 177					$ 116	$ 116					$ 645	$ 662
Other Intangible Assets	0				0				18						0	0					0	18					0	0					0	0
Total	1,335				1,335				1,354						381	381					193	195					116	116					645	662
Amortized intangible assets
Gross carrying amount	878				878				903		310	310	20	20	330	330	28	32	40	61	68	93	110	110	33	33	143	143	105	105	232	232	337	337		553	557	325	346
Accumulated amortization	(655)				(655)				(634)		(255)	(247)	(8)	(6)	(263)	(253)	(19)	(19)	(31)	(43)	(50)	(62)	(100)	(96)	(24)	(23)	(124)	(119)	(45)	(37)	(173)	(163)	(218)	(200)		(419)	(399)	(236)	(235)
Amortized intangible assets, net	223				223				269																											134	158	89	111
Impairment charges of intangible assets and purchased technology			24																		24														6					18
Future estimated amortization expense
Future estimated amortization expense, 2011					12
Future estimated amortization expense, 2012					50
Future estimated amortization expense, 2013					48
Future estimated amortization expense, 2014					40
Future estimated amortization expense, 2015					25
Future estimated amortization expense, after 2015					48
Total					223
Goodwill , Purchased Technology and Other Intangible Assets (Textuals) [Abstract]
Goodwill from the Energy and Environmental Solutions segment								17
Useful Life, Minimum					1
Useful Life, Maximum					15
Amortization expense	$ 13			$ 17	$ 40		$ 71

[1] Amounts as of July 31, 2011 are unaudited. Amounts as of October 31, 2010 are derived from the October 31, 2010 audited consolidated financial statements.