Financial Instruments (Interest Rate and Credit Risks) (Details) $ in Millions	3 Months Ended	12 Months Ended
	Mar. 31, 2016 USD ($)	Dec. 31, 2015 USD ($) customer
Interest rate risk
Average interest rate received on cash and liquid investments	less than 1% per annum.
Line of Credit Facility [Line Items]
Short-term borrowings	$ 2,211.3	$ 1,511.5
Interest rate swaps, notional amount	5,100.0
Interest rate swaps, fair value	2.0
Loss recognized in the income statement, within interest expense	(2.0)
Accounts, Notes, Loans and Financing Receivable [Line Items]
Number of major external customers | customer		3
Customer concentration risk
Accounts, Notes, Loans and Financing Receivable [Line Items]
Concentration risk percentage		47.00%
Revolving Credit Facility
Line of Credit Facility [Line Items]
Short-term borrowings	1,210.0	$ 750.0
Government-owned or Supported Healthcare Providers | Italy
Accounts, Notes, Loans and Financing Receivable [Line Items]
Accounts receivable received	24.3
Government-owned or Supported Healthcare Providers | Spain
Accounts, Notes, Loans and Financing Receivable [Line Items]
Accounts receivable received	$ 22.0