Derivative Instruments (Details 3) (Not Designated as Hedging Instruments, USD $) In Millions, unless otherwise specified	Jan. 31, 2014	Oct. 31, 2013	Jan. 31, 2013
Interest rate contracts
Derivatives Not Designated as Hedging Instruments
Notional amounts	$ 3,118	$ 2,950	$ 2,265
Foreign Exchange Contracts
Derivatives Not Designated as Hedging Instruments
Notional amounts	1,555	1,339	1,615
Cross-Currency Interest Rate Contracts
Derivatives Not Designated as Hedging Instruments
Notional amounts	86	85	82
Interest Rate Caps- Purchased
Derivatives Not Designated as Hedging Instruments
Notional amounts	1,458	1,641	1,263
Interest Rate Caps- Sold
Derivatives Not Designated as Hedging Instruments
Notional amounts	$ 1,458	$ 1,641	$ 1,263