Derivatives and Hedging Activities - Fair Value of Derivative Instruments (Details) € in Millions, $ in Millions	Jun. 30, 2017 EUR (€)	Jun. 30, 2017 USD ($)	Dec. 31, 2016 EUR (€)	Dec. 31, 2016 USD ($)
Derivatives Fair Value [Line Items]
Total Derivative Assets		$ 33.8		$ 40.2
Gross position		(60.0)		(16.9)
Net Derivatives		(26.2)		23.3
Long-term debt, less current portion		3,790.1		3,762.6
Reclassified to assets held for sale		3,016.4		825.7
Reclassified to liabilities held for sale		(1,293.6)		(683.3)
Foreign currency forward contracts
Derivatives Fair Value [Line Items]
Total Derivative Assets		10.5		16.3
Gross position		(17.9)		(11.6)
Reclassified to assets held for sale		(1.5)
Reclassified to liabilities held for sale				(1.4)
Interest rate and currency swaps
Derivatives Fair Value [Line Items]
Total Derivative Assets		23.3		23.9
Reclassified to assets held for sale		23.3		23.9
Cross-currency swaps
Derivatives Fair Value [Line Items]
Gross position		(42.1)		(5.3)
Designated as Hedging Instruments | Foreign currency forward contracts
Derivatives Fair Value [Line Items]
Long-term debt, less current portion	€ 400.0	453.9	€ 400.0	416.7
Designated as Hedging Instruments | Cash Flow
Derivatives Fair Value [Line Items]
Total Derivative Assets		23.7		28.8
Gross position		(2.0)		(0.1)
Net Derivatives		21.7		28.7
Designated as Hedging Instruments | Cash Flow | Foreign currency forward contracts
Derivatives Fair Value [Line Items]
Total Derivative Assets		0.4		4.9
Gross position		(2.0)		(0.1)
Designated as Hedging Instruments | Cash Flow | Interest rate and currency swaps
Derivatives Fair Value [Line Items]
Total Derivative Assets		23.3		23.9
Designated as Hedging Instruments | Cash Flow | Cross-currency swaps
Derivatives Fair Value [Line Items]
Gross position		0.0		0.0
Designated as Hedging Instruments | Net Investment Hedge
Derivatives Fair Value [Line Items]
Total Derivative Assets		0.0		0.0
Gross position		(42.1)		(5.3)
Net Derivatives		(42.1)		(5.3)
Designated as Hedging Instruments | Net Investment Hedge | Foreign currency forward contracts
Derivatives Fair Value [Line Items]
Total Derivative Assets		0.0		0.0
Gross position		0.0		0.0
Designated as Hedging Instruments | Net Investment Hedge | Interest rate and currency swaps
Derivatives Fair Value [Line Items]
Total Derivative Assets		0.0		0.0
Designated as Hedging Instruments | Net Investment Hedge | Cross-currency swaps
Derivatives Fair Value [Line Items]
Gross position		(42.1)		(5.3)
Non-Designated
Derivatives Fair Value [Line Items]
Total Derivative Assets		10.1		11.4
Gross position		(15.9)		(11.5)
Net Derivatives		(5.8)		(0.1)
Non-Designated | Foreign currency forward contracts
Derivatives Fair Value [Line Items]
Total Derivative Assets		10.1		11.4
Gross position		(15.9)		(11.5)
Non-Designated | Interest rate and currency swaps
Derivatives Fair Value [Line Items]
Total Derivative Assets		0.0		0.0
Non-Designated | Cross-currency swaps
Derivatives Fair Value [Line Items]
Gross position		$ 0.0		$ 0.0