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Other Intangible Assets
 12 Months Ended
Dec. 31, 2013
Other Intangible Assets

8. Other Intangible Assets

Other intangible assets at December 31 consisted of:

 

     2013     2012  
     Gross
Carrying
Amount		      Accumulated
Amortization		     Gross
Carrying
Amount		      Accumulated
Amortization		  

(dollars in millions)

           

Core and developed technologies

    $ 968.3       $ (271.5 )    $ 717.7       $ (211.2 ) 

Customer relationships

      144.6         (51.4 )      144.2         (38.8 ) 

In-process research and development(A)

      270.5         —          167.8         —     

Other intangibles

      241.8         (137.4 )      216.1         (121.2 ) 
  

 

 

     

 

 

    

 

 

     

 

 

  
   $ 1,625.2       $ (460.3 )    $ 1,245.8       $ (371.2 ) 
  

 

 

     

 

 

    

 

 

     

 

 

  

 

(A)

Amounts capitalized as in-process research and development are accounted for as indefinite-lived intangible assets.

 

Amortization expense was $89.5 million, $82.7 million and $63.3 million in 2013, 2012 and 2011, respectively. The estimated amortization expense for the years 2014 through 2018 based on the company’s amortizable intangible assets as of December 31, 2013 is as follows: 2014 - $106.0 million; 2015 - $104.0 million; 2016 - $100.5 million; 2017 - $97.2 million; and 2018 - $93.6 million.