Derivative Instruments (Details 3) (Not Designated as Hedging Instruments, USD $) In Millions, unless otherwise specified	Oct. 31, 2013	Oct. 31, 2012
Interest rate contracts
Derivatives Not Designated as Hedging Instruments
Notional amounts	$ 2,950	$ 2,380
Foreign Exchange Contracts
Derivatives Not Designated as Hedging Instruments
Notional amounts	1,339	1,298
Cross-Currency Interest Rate Contracts
Derivatives Not Designated as Hedging Instruments
Notional amounts	85	78
Interest Rate Caps- Purchased
Derivatives Not Designated as Hedging Instruments
Notional amounts	1,641	1,445
Interest Rate Caps- Sold
Derivatives Not Designated as Hedging Instruments
Notional amounts	$ 1,641	$ 1,445