Segment Information (Detail 3) - USD ($) $ in Millions	12 Months Ended
	Oct. 31, 2015	Oct. 31, 2014	Oct. 31, 2013
Segment Reporting Information
Net revenue	$ 103,355	$ 111,454	$ 112,298
Net property, plant and equipment:
Property, plant and equipment	11,090	11,340
U.S.
Segment Reporting Information
Net revenue	37,679	38,805	40,284
Net property, plant and equipment:
Property, plant and equipment	5,501	5,668
Non-U.S.
Segment Reporting Information
Net revenue	65,676	72,649	$ 72,014
U.K
Net property, plant and equipment:
Property, plant and equipment	955	1,053
Other countries
Net property, plant and equipment:
Property, plant and equipment	$ 4,634	$ 4,619