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Fair Value of Financial Instruments - Financial assets and liabilities accounted for at fair value on a recurring basis by level within the fair value hierarchy (Details) - Total - Fair value measurement on recurring basis - USD ($)
$ in Millions
Mar. 31, 2017
Dec. 31, 2016
Financial assets and liabilities accounted for at fair value on a recurring basis    
Derivatives assets, current $ 0.1 $ 0.4
Derivative liabilities, current 0.3 1.0
Foreign currency exchange contracts    
Financial assets and liabilities accounted for at fair value on a recurring basis    
Derivatives assets, current   0.2
Derivative liabilities, current 0.3 1.0
Commodity contracts    
Financial assets and liabilities accounted for at fair value on a recurring basis    
Derivatives assets, current 0.1 0.2
Level 1    
Financial assets and liabilities accounted for at fair value on a recurring basis    
Derivatives assets, current 0.0 0.0
Derivative liabilities, current 0.0 0.0
Level 1 | Foreign currency exchange contracts    
Financial assets and liabilities accounted for at fair value on a recurring basis    
Derivatives assets, current   0.0
Derivative liabilities, current 0.0 0.0
Level 1 | Commodity contracts    
Financial assets and liabilities accounted for at fair value on a recurring basis    
Derivatives assets, current 0.0 0.0
Level 2    
Financial assets and liabilities accounted for at fair value on a recurring basis    
Derivatives assets, current 0.1 0.4
Derivative liabilities, current 0.3 1.0
Level 2 | Foreign currency exchange contracts    
Financial assets and liabilities accounted for at fair value on a recurring basis    
Derivatives assets, current   0.2
Derivative liabilities, current 0.3 1.0
Level 2 | Commodity contracts    
Financial assets and liabilities accounted for at fair value on a recurring basis    
Derivatives assets, current 0.1 0.2
Level 3    
Financial assets and liabilities accounted for at fair value on a recurring basis    
Derivatives assets, current 0.0 0.0
Derivative liabilities, current 0.0 0.0
Level 3 | Foreign currency exchange contracts    
Financial assets and liabilities accounted for at fair value on a recurring basis    
Derivatives assets, current   0.0
Derivative liabilities, current 0.0 0.0
Level 3 | Commodity contracts    
Financial assets and liabilities accounted for at fair value on a recurring basis    
Derivatives assets, current $ 0.0 $ 0.0