Financial Instruments (Details 4) - USD ($) $ in Millions	Oct. 31, 2015	Oct. 31, 2014
Derivative assets
Gross Amount Recognized	$ 1,077	$ 980
Net Amount Presented	1,077	980
Gross Amounts Not Offset
Derivatives	315	361
Derivative, Collateral, Obligation to Return Cash	640	452
Net Amount	122	167
Derivative liabilities
Gross Amount Recognized	496	405
Net Amount Presented	496	405
Gross Amounts Not Offset
Derivatives	315	361
Financial Collateral	19	29
Net Amount	$ 162	$ 15