Financial Instruments (Details 2) - USD ($) $ in Millions	Jul. 31, 2015	Oct. 31, 2014
Cost
Due in one year	$ 135
Due in one to five years	4
Due in more than five years	320
Total	459
Fair Value
Due in one year	135
Due in one to five years	4
Due in more than five years	386
Total	525
Equity securities in privately held companies | Long-term Financing Receivables and Other Assets
Investment Holdings
Investment amount	$ 60	$ 97