Derivative Instruments (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended		12 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016	Dec. 31, 2016
Derivative Instruments (Textual) [Abstract]
Gain/Loss on fair value of foreign currency forward contracts	$ 113.0		$ 113.0		$ (49.8)
Net gains (losses) of other income (expense) related to foreign currency forward contracts	(1.2)	$ 0.4	$ (5.7)	$ 16.6
Minimum
Derivative Instruments (Textual) [Abstract]
Range of durations of foreign currency forward contracts			1 month		1 month
Maximum
Derivative Instruments (Textual) [Abstract]
Range of durations of foreign currency forward contracts			21 months		18 months
Not designated as hedging instrument
Derivative Instruments (Textual) [Abstract]
Aggregate notional amount	366.2		$ 366.2		$ 902.1
Other current assets | Designated as hedging instrument
Summary of Derivatives designated as Hedging Instruments
Derivative asset, fair value, net					50.4
Other current assets | Not designated as hedging instrument
Summary of Derivatives designated as Hedging Instruments
Derivative asset, fair value, net	1.3		1.3		4.0
Investments and other assets | Designated as hedging instrument
Summary of Derivatives designated as Hedging Instruments
Derivative asset, fair value, net	0.3		0.3		6.6
Accrued expenses and other | Designated as hedging instrument
Summary of Derivatives designated as Hedging Instruments
Derivative liability, fair value, net	80.8		80.8
Accrued expenses and other | Not designated as hedging instrument
Summary of Derivatives designated as Hedging Instruments
Derivative liability, fair value, net	1.2		1.2		9.0
Other long-term liabilities | Designated as hedging instrument
Summary of Derivatives designated as Hedging Instruments
Derivative liability, fair value, net	24.2		24.2		4.6
Foreign exchange contract | Designated as hedging instrument
Derivative Instruments (Textual) [Abstract]
Aggregate notional amount	1,637.9		1,637.9		871.7
Interest rate swap | Designated as hedging instrument
Derivative Instruments (Textual) [Abstract]
Aggregate notional amount	675.0		675.0
Revenue | Foreign exchange contract
Derivative Instruments (Textual) [Abstract]
Net gains (losses) in product revenue for the settlement of certain effective cash flow hedge instruments	(18.8)	(5.2)	(15.1)	(0.7)
Operating expense | Foreign exchange contract
Derivative Instruments (Textual) [Abstract]
Net gains (losses) in product revenue for the settlement of certain effective cash flow hedge instruments	0.5	(0.2)	0.7	(0.4)
Other income (expense) | Cash flows, revenue | Foreign exchange contract
Derivative Instruments (Textual) [Abstract]
Net gains (losses) in earnings of Foreign currency forward contracts due to hedge ineffectiveness	0.7	(0.6)	6.7	3.4
Other income (expense) | Cash flows, operating expenses | Foreign exchange contract
Derivative Instruments (Textual) [Abstract]
Net gains (losses) in earnings of Foreign currency forward contracts due to hedge ineffectiveness	0.2	$ 0.0	(0.1)	$ (0.3)
Euro | Foreign exchange contract | Designated as hedging instrument
Derivative Instruments (Textual) [Abstract]
Aggregate notional amount	1,573.4		1,573.4		871.7
British pound | Foreign exchange contract | Designated as hedging instrument
Derivative Instruments (Textual) [Abstract]
Aggregate notional amount	39.7		39.7		0.0
Canadian dollar | Foreign exchange contract | Designated as hedging instrument
Derivative Instruments (Textual) [Abstract]
Aggregate notional amount	19.7		19.7		0.0
Swiss franc | Foreign exchange contract | Designated as hedging instrument
Derivative Instruments (Textual) [Abstract]
Aggregate notional amount	$ 5.1		$ 5.1		$ 0.0
2.900% Senior Notes due 2020
Derivative Instruments (Textual) [Abstract]
Senior Notes interest rate	2.90%		2.90%