Financial Instruments - Effects of Derivative Financial Instruments on Income and Other Comprehensive Income (Loss) (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended
	Mar. 31, 2015	Mar. 31, 2014
Derivative Instruments, Gain (Loss) [Line Items]
Derivative financial instruments, net of tax (benefit) expense	$ (1.2)	$ (0.6)
Foreign exchange contracts | Not Designated as Hedging Instrument | Foreign Currency Gain (Loss)
Derivative Instruments, Gain (Loss) [Line Items]
Foreign currency gain (loss), net	0.5	(0.1)
Interest Rate Swap | Designated as Hedging Instrument
Derivative Instruments, Gain (Loss) [Line Items]
Other Comprehensive Income (Loss), Derivatives Qualifying as Hedges, Net of Tax	$ (1.9)	$ (1.0)