Financial Instruments - Effects of Derivative Financial Instruments on Income and Other Comprehensive Income (Loss) (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2014		Dec. 31, 2013		Dec. 31, 2012
Derivative Instruments, Gain (Loss) [Line Items]
Other Comprehensive Income (Loss), Unrealized Gain (Loss) on Derivatives Arising During Period, Net of Tax	$ (3.7)	[1],[2]	$ 1.5	[1],[2]	$ 0	[1]
Derivative financial instruments, net of tax (benefit) expense	(2.3)		1.0		0
Foreign exchange contracts | Not Designated as Hedging Instrument | Foreign Currency Gain (Loss)
Derivative Instruments, Gain (Loss) [Line Items]
Foreign currency gain (loss), net	0.5		2.2		(1.9)
Interest Rate Swap | Designated as Hedging Instrument
Derivative Instruments, Gain (Loss) [Line Items]
Other Comprehensive Income (Loss), Derivatives Qualifying as Hedges, Net of Tax	$ (3.7)		$ 1.5		$ 0

[1] Net of tax (benefit) expense of $(2.3) million and $1.0 million for 2014 and 2013, respectively.

[2] (d) For 2014 and 2013, the 2013 Interest Rate Swap was deemed effective and therefore, the changes in fair value related to the 2013 Interest Rate Swap are recorded in Other Comprehensive Income. See Note 13, "Financial Instruments" for further discussion of the 2013 Interest Rate Swap.