Taxes on Earnings (Detail 7) - USD ($) $ in Millions	Oct. 31, 2015	Oct. 31, 2014
Taxes on Earnings
Capital loss carryforwards	$ 26
Valuation allowance
Valuation allowance for deferred tax assets	9,878	$ 11,915
Operating loss carryforwards. | Federal and state
Valuation allowance
Valuation allowance for deferred tax assets	106
Operating loss carryforwards. | Foreign
Valuation allowance
Valuation allowance for deferred tax assets	$ 8,200