Derivative Financial Instruments and Credit Risk - Gain (Loss) on Derivatives Not Designated as Hedging Instruments (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Derivative [Line Items]
Foreign exchange contracts	$ 0.4	$ (0.7)	$ (0.3)
Remeasurement of assets and liabilities in foreign currencies	(1.3)	1.0	(0.2)
Net gain (loss) on foreign currency transactions	(0.9)	0.3	(0.5)
Revenue
Derivative [Line Items]
Foreign exchange contracts	0.8	(1.5)	0.0
Cost of sales
Derivative [Line Items]
Foreign exchange contracts	(0.3)	0.9	0.4
Other income, net
Derivative [Line Items]
Foreign exchange contracts	$ (0.1)	$ (0.1)	$ (0.7)