Debt (Cash Convertible Notes) (Narrative) (Details) $ / shares in Units, shares in Millions, $ in Millions		9 Months Ended
		Sep. 30, 2015 USD ($)	Sep. 30, 2014 USD ($)	Sep. 15, 2011 $ / shares shares	Sep. 15, 2008 USD ($) $ / shares shares
Debt Instrument [Line Items]
Proceeds from convertible note hedge		$ 1,970.8	$ 0.0
Old warrants
Debt Instrument [Line Items]
Number of warrants exchanged | shares				41.0
Warrants issued, exercise price per share | $ / shares					$ 20.00
Old warrants | Maximum
Debt Instrument [Line Items]
Warrant, number of shares of ordinary shares called by warrants | shares					43.2
New warrants
Debt Instrument [Line Items]
Warrants issued, exercise price per share | $ / shares				$ 30.00
Purchased cash convertible note hedge
Debt Instrument [Line Items]
Proceeds from convertible note hedge		$ 1,970.0
Convertible Debt | Cash Convertible Notes
Debt Instrument [Line Items]
Outstanding principal					$ 575.0
Stated percentage rate	[1]				3.75%
Effective interest rate		9.50%
Extinguishment of debt amount		$ 2,540.0

[1] The Cash Convertible Notes matured on September 15, 2015 and the remaining amount outstanding was repaid in full by the Company utilizing proceeds from the Delayed Draw Loan, included in 2015 Term Loans above. In addition, the convertible note hedge was settled during the third quarter of 2015.