Segment Information (Details 3) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Oct. 31, 2013	Oct. 31, 2012	Oct. 31, 2011
Segment Reporting Information
Net revenue	$ 112,298	$ 120,357	$ 127,245
Net property, plant and equipment:
Property, plant and equipment	11,463	11,954	12,292
U.S.
Segment Reporting Information
Net revenue	40,284	42,140	44,111
Net property, plant and equipment:
Property, plant and equipment	5,546	5,894	6,126
Non-U.S.
Segment Reporting Information
Net revenue	72,014	78,217	83,134
U.K
Net property, plant and equipment:
Property, plant and equipment	1,090	1,195	1,195
Other countries
Net property, plant and equipment:
Property, plant and equipment	$ 4,827	$ 4,865	$ 4,971