Derivatives and Hedging Activities - Effect of Derivative Instruments on Condensed Consolidated Statements of Operations (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016
Derivative Instruments Gain Loss [Line Items]
Amount of Gain (Loss) Recognized in Earnings on Derivatives	$ 0.7	$ (22.9)	$ 6.7	$ (42.4)
Derivatives designated as hedging instruments | Interest rate and currency swaps
Derivative Instruments Gain Loss [Line Items]
Amount of Gain (Loss) Recognized in Earnings on Derivatives	3.6	(11.9)	1.0	(21.7)
Interest expense (income)	(1.0)	1.4	(2.1)	2.4
Derivatives designated as hedging instruments | Cash Flow
Derivative Instruments Gain Loss [Line Items]
Amount of Gain (Loss) Recognized in Earnings on Derivatives	4.0	(14.8)	0.9	(23.9)
Derivatives designated as hedging instruments | Cash Flow | Foreign currency forward contracts
Derivative Instruments Gain Loss [Line Items]
Amount of Gain (Loss) Recognized in Earnings on Derivatives	1.3	(1.5)	1.9	0.2
Derivatives designated as hedging instruments | Cash Flow | Interest rate and currency swaps
Derivative Instruments Gain Loss [Line Items]
Amount of Gain (Loss) Recognized in Earnings on Derivatives	2.7	(13.3)	(1.1)	(24.2)
Derivatives designated as hedging instruments | Cash Flow | Treasury locks
Derivative Instruments Gain Loss [Line Items]
Amount of Gain (Loss) Recognized in Earnings on Derivatives	0.0	0.0	0.1	0.1
Derivatives designated as hedging instruments | Fair Value Hedges | Interest rate swaps
Derivative Instruments Gain Loss [Line Items]
Amount of Gain (Loss) Recognized in Earnings on Derivatives	0.1	0.0	0.2	0.2
Derivatives not designated as hedging instruments | Foreign currency forward contracts
Derivative Instruments Gain Loss [Line Items]
Amount of Gain (Loss) Recognized in Earnings on Derivatives	(3.4)	(8.1)	5.6	(18.7)
Derivatives not designated as hedging instruments | Foreign currency forward contracts | Discontinued Operations
Derivative Instruments Gain Loss [Line Items]
Amount of Gain (Loss) Recognized in Earnings on Derivatives	$ 4.5	$ (13.0)	$ 5.0	$ (19.6)