Derivative Instruments (Details 3) (Not Designated as Hedging Instruments, USD $) In Millions, unless otherwise specified	Oct. 31, 2014	Oct. 31, 2013
Interest rate contracts
Derivatives Not Designated as Hedging Instruments
Notional amounts	$ 3,076	$ 2,950
Foreign Exchange Contracts
Derivatives Not Designated as Hedging Instruments
Notional amounts	1,364	1,339
Cross-Currency Interest Rate Contracts
Derivatives Not Designated as Hedging Instruments
Notional amounts	98	85
Interest Rate Caps- Purchased
Derivatives Not Designated as Hedging Instruments
Notional amounts	1,703	1,641
Interest Rate Caps- Sold
Derivatives Not Designated as Hedging Instruments
Notional amounts	$ 1,703	$ 1,641