Taxes on Earnings (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
Oct. 31, 2014	Oct. 31, 2013	Oct. 31, 2012
Domestic and foreign components of earnings (loss) before taxes
U.S.	$ 2,565	$ 2,618	$ (3,192)
Non-U.S.	3,992	3,892	(8,741)
Earnings (loss) before taxes	6,557	6,510	(11,933)
U.S. federal taxes:
Current	381us-gaap_CurrentFederalTaxExpenseBenefit	475us-gaap_CurrentFederalTaxExpenseBenefit	330us-gaap_CurrentFederalTaxExpenseBenefit
Deferred	210	(666)	81
Non-U.S. taxes:
Current	984us-gaap_CurrentForeignTaxExpenseBenefit	1,275us-gaap_CurrentForeignTaxExpenseBenefit	1,139us-gaap_CurrentForeignTaxExpenseBenefit
Deferred	(42)	89	(787)
State taxes:
Current	212	57	(41)
Deferred	(201)	167	(5)
Provision for (benefit from) taxes on earnings	$ 1,544us-gaap_IncomeTaxExpenseBenefit	$ 1,397us-gaap_IncomeTaxExpenseBenefit	$ 717us-gaap_IncomeTaxExpenseBenefit

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