Derivative Financial Instruments - Schedule of Fair Value Hedging Instruments, Statements of Financial Performance and Financial Position, Location (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Derivative Instruments and Hedging Activities Disclosures [Line Items]
(Gain) loss on non-derivative instruments, net	$ (0.2)	$ 2.0	$ (2.0)	$ 5.0
Other Nonoperating Income (Expense) [Member] | Foreign Exchange Contract [Member]
Derivative Instruments and Hedging Activities Disclosures [Line Items]
(Gain) loss on non-derivative instruments, net	(0.1)	0.7	(1.9)	1.9
Interest Expense [Member] | Interest Rate Cap [Member]
Derivative Instruments and Hedging Activities Disclosures [Line Items]
(Gain) loss on non-derivative instruments, net	$ (0.1)	$ 1.3	$ (0.1)	$ 3.1