Goodwill and Intangible Assets (Details 2) - USD ($) $ in Millions	12 Months Ended
	Oct. 31, 2015	Oct. 31, 2014
Intangible assets
Amortizable intangible assets, accumulated amortization	$ (4,896)	$ (4,790)
Finite-lived Intangible Assets, Accumulated Impairment Losses	(4,330)	(4,330)
Amortizable intangible assets, net	1,855
Intangible assets, gross	11,240	11,248
Intangible assets	2,014	2,128
Amount of fully amortized intangible assets	936	855
In-process research and development
Intangible assets
Indefinite-lived intangible assets	159
Customer contracts, customer lists and distribution agreements
Intangible assets
Amortizable intangible assets, gross	5,311	5,289
Amortizable intangible assets, accumulated amortization	(3,674)	(3,228)
Finite-lived Intangible Assets, Accumulated Impairment Losses	(856)	(856)
Amortizable intangible assets, net	$ 781	1,205
Weighted-Average Useful Lives	8 years
Developed and core technology and patents
Intangible assets
Amortizable intangible assets, gross	$ 4,312	4,266
Amortizable intangible assets, accumulated amortization	(1,165)	(1,301)
Finite-lived Intangible Assets, Accumulated Impairment Losses	(2,138)	(2,138)
Amortizable intangible assets, net	$ 1,009	827
Weighted-Average Useful Lives	7 years
Trade name and trade marks
Intangible assets
Amortizable intangible assets, gross	$ 1,458	1,693
Amortizable intangible assets, accumulated amortization	(57)	(261)
Intangible Assets, Accumulated Impairment Losses	(1,336)	(1,336)
Amortizable intangible assets, net	$ 65	$ 96
Weighted-Average Useful Lives	7 years