DERIVATIVE INSTRUMENTS (Details 3) - Not Designated as Hedging Instruments - USD ($) $ in Millions	Apr. 30, 2016	Oct. 31, 2015	Apr. 30, 2015
Interest Rate Contracts
Derivatives Not Designated as Hedging Instruments
Notional amounts	$ 6,524	$ 6,333	$ 6,342
Interest Rate Contracts | Purchased
Derivatives Not Designated as Hedging Instruments
Notional amounts	762	1,069	1,320
Interest Rate Contracts | Sold
Derivatives Not Designated as Hedging Instruments
Notional amounts	762	1,069	1,320
Foreign Exchange Contracts
Derivatives Not Designated as Hedging Instruments
Notional amounts	3,894	3,160	3,750
Cross-Currency Interest Rate Contracts
Derivatives Not Designated as Hedging Instruments
Notional amounts	$ 74	$ 76	$ 94