Financial Instruments - Fair Value of Derivative Financial Instruments in Consolidated Balance Sheet (Details) (Foreign Exchange Contract [Member], Not Designated as Hedging Instrument [Member], USD $) In Millions, unless otherwise specified	Jun. 30, 2013		Dec. 31, 2012
Prepaid Expenses and Other [Member]
Derivatives not designated as hedging instruments:
Derivative Asset, Fair Value, Gross Asset	$ 1.9	[1]	$ 0.1	[1]
Accrued Expenses [Member]
Derivatives not designated as hedging instruments:
Derivative Liability, Fair Value, Gross Liability	$ 0.2	[1]	$ 0.4	[1]

[1] The fair values of the FX Contracts at June 30, 2013 and December 31, 2012 were determined by using observable market transactions of spot and forward rates at June 30, 2013 and December 31, 2012, respectively.