Derivative Instruments (Details 3) (Not Designated as Hedging Instruments, USD $) In Millions, unless otherwise specified	Apr. 30, 2014	Oct. 31, 2013	Apr. 30, 2013
Interest rate contracts
Derivatives Not Designated as Hedging Instruments
Notional amounts	$ 3,149	$ 2,950	$ 2,436
Foreign Exchange Contracts
Derivatives Not Designated as Hedging Instruments
Notional amounts	1,391	1,339	1,756
Cross-Currency Interest Rate Contracts
Derivatives Not Designated as Hedging Instruments
Notional amounts	88	85	79
Interest Rate Caps- Purchased
Derivatives Not Designated as Hedging Instruments
Notional amounts	1,597	1,641	1,434
Interest Rate Caps- Sold
Derivatives Not Designated as Hedging Instruments
Notional amounts	$ 1,597	$ 1,641	$ 1,434