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Other Expense (Details) (USD $)
In Millions, unless otherwise specified
3 Months Ended
Mar. 31, 2014
Mar. 31, 2013
Other Income and Expenses [Abstract]    
Development income $ (0.4) $ (0.3)
Acquisition-related contingencies 0.4 0
Foreign exchange and other 0.7 0.5
Other expense $ 0.7 $ 0.2