DERIVATIVE INSTRUMENTS (Details 2) (USD $) In Millions, unless otherwise specified	Apr. 30, 2012	Oct. 31, 2011	Apr. 30, 2011
Interest Rate Contracts
Derivatives Not Designated as Hedging Instruments
Notional amounts	$ 2,977	$ 3,216	$ 2,591
Foreign Exchange Contracts
Derivatives Not Designated as Hedging Instruments
Notional amounts	3,611	3,058	3,219
Cross-Currency Interest Rate Contracts
Derivatives Not Designated as Hedging Instruments
Notional amounts	71	52	54
Interest Rate Caps- Purchased
Derivatives Not Designated as Hedging Instruments
Notional amounts	1,345	1,402	1,160
Interest Rate Caps- Sold
Derivatives Not Designated as Hedging Instruments
Notional amounts	$ 1,345	$ 1,402	$ 1,160