Financial Instruments - Effects of Derivative Financial Instruments on Income and Other Comprehensive Income (Loss) (Details) - USD ($) $ in Millions		3 Months Ended		9 Months Ended
		Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Derivative Instruments, Gain (Loss) [Line Items]
2013 Interest Rate Swap, net of tax	[1]	$ (0.7)	$ 0.6	$ (2.7)	$ (2.3)
2013 Interest Rate Swap, tax expense (benefit)		0.5	0.4	(1.7)	(1.4)
Interest Rate Swap | Designated as Hedging Instrument
Derivative Instruments, Gain (Loss) [Line Items]
2013 Interest Rate Swap, net of tax		(0.7)	0.6	(2.7)	(2.3)
Interest Rate Swap | Designated as Hedging Instrument | Interest Expense
Derivative Instruments, Gain (Loss) [Line Items]
Derivative, Loss on Derivative		(1.0)	0.0	(1.5)	0.0
Foreign exchange contracts | Not Designated as Hedging Instrument | Foreign Currency Gain (Loss)
Derivative Instruments, Gain (Loss) [Line Items]
Foreign currency gain (loss), net		$ 2.3	$ 1.5	$ 3.2	$ 0.2

[1] Net of tax benefit of $0.5 million and $0.4 million for the three months ended September 30, 2015 and 2014, respectively, and $1.7 million and $1.4 million for the nine months ended September 30, 2015 and 2014, respectively.