Derivative Instruments and Hedging Activities (Foreign Currency Forward Contracts) (Details) - Foreign exchange contracts - Designated as hedging instruments - USD ($) $ in Millions	6 Months Ended	12 Months Ended
	Jun. 30, 2016	Dec. 31, 2015
Derivative Instruments, Gain (Loss) [Line Items]
Period to settlement dates of derivatives is within this period	54 months	36 months
Cash flow hedges
Derivative Instruments, Gain (Loss) [Line Items]
Notional Amount	$ 3,554.1	$ 3,915.0
Cash flow hedges | Australian Dollar
Derivative Instruments, Gain (Loss) [Line Items]
Notional Amount	50.9	45.1
Cash flow hedges | British Pound
Derivative Instruments, Gain (Loss) [Line Items]
Notional Amount	230.9	289.3
Cash flow hedges | Canadian Dollar
Derivative Instruments, Gain (Loss) [Line Items]
Notional Amount	217.8	135.9
Cash flow hedges | Euro
Derivative Instruments, Gain (Loss) [Line Items]
Notional Amount	2,284.8	2,934.3
Cash flow hedges | Japanese Yen
Derivative Instruments, Gain (Loss) [Line Items]
Notional Amount	762.1	510.4
Cash flow hedges | Swedish Krona
Derivative Instruments, Gain (Loss) [Line Items]
Notional Amount	$ 7.6	$ 0.0