Derivative Instruments (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended		9 Months Ended		12 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013	Dec. 31, 2013
Derivative Instruments (Textual) [Abstract]
Lower range of durations of foreign currency forward contracts			1 month		1 month
Higher range of durations of foreign currency forward contracts			15 months		18 months
Gain/Loss on fair value of foreign currency forward contracts	$ 41.5		$ 41.5		$ 23.6
Expected settlement time for contracts, in months			15 months
Net gains (losses) of other income (expense) related to foreign currency forward contracts	7.7	0.2	11.5	1.3
Designated as hedging instrument
Derivative Instruments (Textual) [Abstract]
Aggregate notional amount	660.8		660.8		742.6
Not designated as hedging instrument
Derivative Instruments (Textual) [Abstract]
Aggregate notional amount	376.1		376.1		273.3
Foreign Exchange Contract | Other current assets | Designated as hedging instrument
Summary of Derivatives designated as Hedging Instruments
Derivative asset, fair value, net	33.1		33.1		0.6
Foreign Exchange Contract | Other current assets | Not designated as hedging instrument
Summary of Derivatives designated as Hedging Instruments
Derivative asset, fair value, net	2.0		2.0		3.2
Foreign Exchange Contract | Investments and other assets | Designated as hedging instrument
Summary of Derivatives designated as Hedging Instruments
Derivative asset, fair value, net	7.8		7.8
Foreign Exchange Contract | Accrued expenses and other | Designated as hedging instrument
Summary of Derivatives designated as Hedging Instruments
Derivative liability, fair value, net	0.2		0.2		23.4
Foreign Exchange Contract | Accrued expenses and other | Not designated as hedging instrument
Summary of Derivatives designated as Hedging Instruments
Derivative liability, fair value, net	6.6		6.6		0.1
Foreign Exchange Contract | Other long-term liabilities | Designated as hedging instrument
Summary of Derivatives designated as Hedging Instruments
Derivative liability, fair value, net	0		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	2.9	(7.3)	(7.1)	(6.1)
Other income (expense) | Foreign Exchange Contract
Derivative Instruments (Textual) [Abstract]
Net gains (losses) in earnings of Foreign currency forward contracts due to hedge ineffectiveness	(0.5)	(0.1)	(1.6)	0.2
Euro | Designated as hedging instrument
Derivative Instruments (Textual) [Abstract]
Aggregate notional amount	629.3		629.3		636.3
Canadian Dollar | Designated as hedging instrument
Derivative Instruments (Textual) [Abstract]
Aggregate notional amount	10.6		10.6		34.0
British Pound Sterling | Designated as hedging instrument
Derivative Instruments (Textual) [Abstract]
Aggregate notional amount	$ 20.9		$ 20.9		$ 72.3