Derivatives and Hedging Activities - Effect of Derivative Instruments on Condensed Consolidated Statements of Operations (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Derivative Instruments Gain Loss [Line Items]
Amount of Gain (Loss) Recognized in Earnings on Derivatives	$ (16.1)	$ (7.3)	$ (9.4)	$ (49.7)
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	(2.0)	1.2	(1.0)	(20.5)
Interest expense (income)	(0.4)	(1.5)	(2.5)	(4.0)
Derivatives designated as hedging instruments | Cash Flow Hedge
Derivative Instruments Gain Loss [Line Items]
Amount of Gain (Loss) Recognized in Earnings on Derivatives	(2.4)	(1.5)	(1.5)	(25.4)
Derivatives designated as hedging instruments | Cash Flow Hedge | Foreign currency forward contracts
Derivative Instruments Gain Loss [Line Items]
Amount of Gain (Loss) Recognized in Earnings on Derivatives	(0.1)	(1.1)	1.8	(0.9)
Derivatives designated as hedging instruments | Cash Flow Hedge | Interest rate and currency swaps
Derivative Instruments Gain Loss [Line Items]
Amount of Gain (Loss) Recognized in Earnings on Derivatives	(2.3)	(0.4)	(3.4)	(24.6)
Derivatives designated as hedging instruments | Cash Flow Hedge | 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	0.2	0.2	0.4	0.4
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	(13.9)	(6.0)	(8.3)	(24.7)
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	$ 0.1	$ 3.5	$ 3.7	$ (17.8)