Derivative Instruments and Hedging Activities (Foreign Currency Option Contracts) (Details) - Foreign exchange contracts - Designated as hedging instruments - USD ($) $ in Millions	Jun. 30, 2016	Dec. 31, 2015
Purchased Put
Derivative [Line Items]
Notional Amount	$ 1,001.6	$ 641.5
Written Call
Derivative [Line Items]
Notional Amount	$ 1,109.4	$ 690.0