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Debt (Details) (USD $)
In Millions, unless otherwise specified
Mar. 31, 2014
Dec. 31, 2013
Debt    
Short-term borrowings $ 2.8 $ 3.0
Long-term debt 352.0 292.0
Total debt 354.8 295.0
Working capital line of credit - China
   
Debt    
Short-term borrowings 2.8 3.0
Senior secured credit facility - revolving loan due 2018
   
Debt    
Long-term debt $ 352.0 $ 292.0