Financial Instruments (Interest Rate and Credit Risks) (Details) (USD $)	12 Months Ended
	Dec. 31, 2014 customer	Feb. 23, 2015	Dec. 12, 2014	Nov. 11, 2013	Feb. 11, 2015
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 and the Facilities Agreement and considers the risks associated with floating interest rates on the instruments as appropriate. A hypothetical one percentage point increase or decrease in the interest rates applicable to drawings under the RCF and the Facilities Agreement at December 31, 2014 would increase or decrease interest expense by a maximum of $8.5 million per annum.
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	143,000,000
Government-owned or Supported Healthcare Providers | Spain
Accounts, Notes, Loans and Financing Receivable [Line Items]
Accounts receivable received	98,000,000
Revolving Credit Facility
Line of Credit Facility [Line Items]
Facilitiy agreement total amount			2,100,000,000
Facility amount outstanding		1,300,000,000
2013 Facilities Agreement
Line of Credit Facility [Line Items]
Current borrowing outstanding	850,000,000
Facilitiy agreement total amount				850,000,000
Facility amount outstanding	850
2013 Facilities Agreement | Revolving Credit Facility
Line of Credit Facility [Line Items]
Facilitiy agreement total amount				2,600,000,000
2015 Facilities Agreement
Line of Credit Facility [Line Items]
Facilitiy agreement total amount					$ 850,000,000