Derivative Instruments Derivative Instruments (Consolidated Income Statement Impact) (Details) (Selling and administrative expense, USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Foreign currency options
Derivative Instruments, Gain (Loss) [Line Items]
Loss on Foreign Currency Derivative Instruments Not Designated as Hedging Instruments	$ 0	$ (0.4)	$ (1.4)
Foreign currency forwards
Derivative Instruments, Gain (Loss) [Line Items]
Loss on Foreign Currency Derivative Instruments Not Designated as Hedging Instruments	$ 1.1	$ (0.6)	$ (0.4)