Derivative Instruments and Hedging Activities (Foreign Currency Option Contracts) (Details) - USD ($) $ in Millions	Dec. 31, 2015	Dec. 31, 2014
Derivative [Line Items]
Notional amount	$ 9,275.0
Designated as hedging instruments | Foreign exchange contracts
Derivative [Line Items]
Notional amount	3,915.0	$ 4,284.1
Purchased Put | Designated as hedging instruments | Foreign exchange contracts
Derivative [Line Items]
Notional amount	641.5	152.6
Written Call | Designated as hedging instruments | Foreign exchange contracts
Derivative [Line Items]
Notional amount	$ 690.0	$ 160.9