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Other Intangible Assets (Tables)
9 Months Ended
Sep. 30, 2013
Goodwill And Intangible Assets Disclosure [Abstract]  
Summary of Other Intangible Assets

The following table summarizes the other intangible assets movement year on year:

 

     Nine Months Ended
September 30
 

(in millions)

   2013     2012  

Gross cost at January 1

   $ 106.2      $ 51.2   

Capitalization of internally developed software and other costs

     9.0        6.4   

Acquisitions

     33.7        0.0   

Exchange effect

     0.1        0.2   
  

 

 

   

 

 

 

Gross cost at September 30

     149.0        57.8   
  

 

 

   

 

 

 

Accumulated amortization at January 1

     (37.6     (33.5

Amortization expense

     (6.6     (3.1

Exchange effect

     0.0        (0.2
  

 

 

   

 

 

 

Accumulated amortization at September 30

     (44.2     (36.8
  

 

 

   

 

 

 

Net book amount at September 30

   $ 104.8      $ 21.0