Financial Instruments (Details 4) - USD ($) $ in Millions	Jan. 31, 2016	Oct. 31, 2015
Derivative assets
Gross Amount Recognized	$ 278	$ 258
Net Amount Presented	278	258
Gross Amounts Not Offset
Derivatives	159	162
Financial Collateral	80	9
Net Amount	39	87
Derivative liabilities
Gross Amount Recognized	245	304
Net Amount Presented	245	304
Gross Amounts Not Offset
Derivatives	159	162
Financial Collateral	65
Net Amount	$ 21	$ 142