Derivative Instruments (Details 3) - Not Designated as Hedging Instruments - USD ($) $ in Millions	Jan. 31, 2016	Oct. 31, 2015	Jan. 31, 2015
Interest rate contracts
Derivatives Not Designated as Hedging Instruments
Notional amounts	$ 2,603.8	$ 2,679.5	$ 2,752.8
Interest rate contracts | Purchased
Derivatives Not Designated as Hedging Instruments
Notional amounts	1,668.7	1,902.1	1,501.5
Interest rate contracts | Sold
Derivatives Not Designated as Hedging Instruments
Notional amounts	1,668.7	1,902.1	1,501.5
Foreign exchange contracts
Derivatives Not Designated as Hedging Instruments
Notional amounts	1,109.7	966.6	1,083.6
Cross-currency interest rate contracts
Derivatives Not Designated as Hedging Instruments
Notional amounts	$ 73.1	$ 75.6	$ 96.8