Financial Instruments and Risk Management (Effect Of Derivative Instruments on the Condensed Consolidated Statements of Operations, Derivatives Not Designated as Hedging Instruments) (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Derivative Instruments, Gain (Loss) [Line Items]
Amount of (Loss) Gain Recognized in Earnings on Derivatives	$ (36.8)	$ 22.2	$ (98.3)	$ 29.8
Foreign currency forward contracts | Other expense
Derivative Instruments, Gain (Loss) [Line Items]
Amount of (Loss) Gain Recognized in Earnings on Derivatives	(36.8)		(98.3)
Foreign currency forward contracts | Other income
Derivative Instruments, Gain (Loss) [Line Items]
Amount of (Loss) Gain Recognized in Earnings on Derivatives		22.2		29.8
Cash conversion feature of Cash Convertible Notes | Other income
Derivative Instruments, Gain (Loss) [Line Items]
Amount of (Loss) Gain Recognized in Earnings on Derivatives	0.0	1,689.3	0.0	1,853.5
Purchased cash convertible note hedge | Other expense
Derivative Instruments, Gain (Loss) [Line Items]
Amount of (Loss) Gain Recognized in Earnings on Derivatives	$ 0.0	$ (1,689.3)	$ 0.0	$ (1,853.5)