Financial Instruments (Interest Rate and Credit Risks) (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended
	Mar. 31, 2015 customer	Dec. 31, 2014
Interest rate risk
Average interest rate received on cash and liquid investments	less than 1% per annum.
Line of Credit Facility [Line Items]
Interest rate risk exposure	The Company has evaluated the interest rate risk on the RCF, the 2013 Facilities Agreement and the 2015 Facilitiy Agreement and considers the risks associated with floating interest rates on borrowings under its facilities as appropriate. A hypothetical one percentage point increase or decrease in the interest rates applicable to drawings under the 2013 Facilities Agreement, 2015 Facility Agreement and RCF at March 31, 2015 would increase interest expense by approximately $25 million per annum and would decrease the interest expense by approximately $5 million per annum.
Short-term borrowings	$ 2,570.2	$ 850.0
Accounts, Notes, Loans and Financing Receivable [Line Items]
Number of major external customers	3
Customer concentration risk
Accounts, Notes, Loans and Financing Receivable [Line Items]
Concentration risk percentage	47.00%
Government-owned or Supported Healthcare Providers | Italy
Accounts, Notes, Loans and Financing Receivable [Line Items]
Accounts receivable received	17.4
Government-owned or Supported Healthcare Providers | Spain
Accounts, Notes, Loans and Financing Receivable [Line Items]
Accounts receivable received	17.1
Revolving Credit Facility
Line of Credit Facility [Line Items]
Facilitiy agreement total amount	2,100
Short-term borrowings	845.0	0
2013 Facilities Agreement
Line of Credit Facility [Line Items]
Term loan facility	850
Facilitiy agreement total amount	2,600
Short-term borrowings	850.0	850.0
2015 Facility Agreement
Line of Credit Facility [Line Items]
Facilitiy agreement total amount	850
Short-term borrowings	$ 850.0	$ 0