DERIVATIVE INSTRUMENTS (Details 2) (USD $) In Millions, unless otherwise specified	Jul. 31, 2012	Oct. 31, 2011	Jul. 31, 2011
Interest rate contracts
Derivatives Not Designated as Hedging Instruments
Notional amounts	$ 2,100	$ 2,361	$ 2,109
Foreign Exchange Contracts
Derivatives Not Designated as Hedging Instruments
Notional amounts	1,428	979	1,054
Cross-Currency Interest Rate Contracts
Derivatives Not Designated as Hedging Instruments
Notional amounts	77	52	49
Interest Rate Caps- Purchased
Derivatives Not Designated as Hedging Instruments
Notional amounts	1,590	1,402	1,052
Interest Rate Caps- Sold
Derivatives Not Designated as Hedging Instruments
Notional amounts	$ 1,590	$ 1,402	$ 1,052