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Other Intangible Assets (Tables)
12 Months Ended
Dec. 31, 2012
Other Intangible Assets [Abstract]  
Summary of Other Intangible Assets
                 

(in millions)

  2012     2011  

Gross cost:

               

– Ethyl

  $ 22.1     $ 22.1  

– Technology

    7.1       7.1  

– Customer relationships

    16.0       16.0  

– Patents

    2.9       2.9  

– Internally developed software and other costs

    10.1       3.1  

– Strata

    48.0       0.0  
   

 

 

   

 

 

 
      106.2       51.2  
   

 

 

   

 

 

 

Accumulated amortization:

               

– Ethyl

    (16.6     (15.0

– Technology

    (6.0     (5.3

– Customer relationships

    (12.7     (11.2

– Patents

    (2.3     (2.0

– Internally developed software and other costs

    0.0       0.0  
   

 

 

   

 

 

 
      (37.6     (33.5
   

 

 

   

 

 

 
    $ 68.6     $ 17.7