Derivative Instruments and Hedging Activities (Foreign Currency Forward Contracts) (Details) - Cash flow hedges - Foreign exchange contracts - Designated as hedging instruments - USD ($) $ in Millions	Mar. 31, 2016	Dec. 31, 2015
Derivative Instruments, Gain (Loss) [Line Items]
Notional Amount	$ 4,019.3	$ 3,915.0
Australian Dollar
Derivative Instruments, Gain (Loss) [Line Items]
Notional Amount	52.5	45.1
British Pound
Derivative Instruments, Gain (Loss) [Line Items]
Notional Amount	252.8	289.3
Canadian Dollar
Derivative Instruments, Gain (Loss) [Line Items]
Notional Amount	214.2	135.9
Euro
Derivative Instruments, Gain (Loss) [Line Items]
Notional Amount	2,816.4	2,934.3
Japanese Yen
Derivative Instruments, Gain (Loss) [Line Items]
Notional Amount	670.6	510.4
Swedish Krona
Derivative Instruments, Gain (Loss) [Line Items]
Notional Amount	$ 12.8	$ 0.0