Derivative Financial Instruments - Derivative Assets and Liabilities Measured at Fair Value (Details) - Fair Value, Measurements, Recurring [Member] - Foreign Currency Forward [Member] - USD ($) $ in Millions	Jun. 30, 2015	Dec. 31, 2014
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Foreign currency forward contracts (liability position)	$ 1.7	$ 3.1
Level 1 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Foreign currency forward contracts (liability position)	0.0	0.0
Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Foreign currency forward contracts (liability position)	1.7	3.1
Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Foreign currency forward contracts (liability position)	$ 0.0	$ 0.0