Derivative Instruments (Details 3) - Not Designated as Hedging Instruments - USD ($) $ in Millions	Jul. 31, 2015	Oct. 31, 2014	Jul. 31, 2014
Interest rate contracts
Derivatives Not Designated as Hedging Instruments
Notional amounts	$ 2,651.3	$ 3,075.9	$ 3,147.6
Interest rate contracts | Purchased
Derivatives Not Designated as Hedging Instruments
Notional amounts	2,086.8	1,703.5	1,857.7
Interest rate contracts | Sold
Derivatives Not Designated as Hedging Instruments
Notional amounts	2,086.8	1,703.5	1,857.7
Foreign exchange contracts
Derivatives Not Designated as Hedging Instruments
Notional amounts	853.6	1,364.5	1,356.6
Cross-currency interest rate contracts
Derivatives Not Designated as Hedging Instruments
Notional amounts	$ 79.7	$ 98.1	$ 78.2