Taxes on Earnings (Detail 7) (USD $) In Millions, unless otherwise specified	Oct. 31, 2014	Oct. 31, 2013
Income Taxes
Capital loss carryforwards	$ 272
Valuation allowance
Valuation allowance for deferred tax assets	11,915	11,390
Operating loss carryforwards. | State
Valuation allowance
Valuation allowance for deferred tax assets	133
Operating loss carryforwards. | Foreign
Valuation allowance
Valuation allowance for deferred tax assets	8,700
Capital loss carryforwards
Valuation allowance
Valuation allowance for deferred tax assets	$ 104