Derivative Instruments (Details 3) - Not Designated as Hedging Instruments - USD ($) $ in Millions	Apr. 30, 2016	Oct. 31, 2015	Apr. 30, 2015
Interest rate contracts
Derivatives Not Designated as Hedging Instruments
Notional amounts	$ 2,703.8	$ 2,679.5	$ 2,743.8
Interest rate contracts | Purchased
Derivatives Not Designated as Hedging Instruments
Notional amounts	1,986.2	1,902.1	1,755.5
Interest rate contracts | Sold
Derivatives Not Designated as Hedging Instruments
Notional amounts	1,986.2	1,902.1	1,755.5
Foreign exchange contracts
Derivatives Not Designated as Hedging Instruments
Notional amounts	1,181.2	966.6	945.0
Cross-currency interest rate contracts
Derivatives Not Designated as Hedging Instruments
Notional amounts	$ 73.5	$ 75.6	$ 94.2