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Software development and intellectual property licenses
3 Months Ended
Mar. 31, 2012
Software development and intellectual property licenses  
Software development and intellectual property licenses

5.       Software development and intellectual property licenses

 

The following table summarizes the components of our capitalized software development costs and intellectual property licenses (amounts in millions):

   At At 
   March 31, December 31, 
   2012 2011 
 Internally developed software costs  $131 $115 
 Payments made to third-party software developers   108  84 
 Total software development costs  $239 $199 
         
 Intellectual property licenses  $34 $34 

Amortization, write-offs and impairments of capitalized software development costs and intellectual property licenses are comprised of the following (amounts in millions):

 

    Three Months Ended March 31,
    2012 2011
 Amortization of capitalized software development costs      
  and intellectual property licenses  $31 $73
 Write-offs and impairments   2  ---