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Software Development and Intellectual Property Licenses
12 Months Ended
Dec. 31, 2019
Software Development Costs and Intellectual Property Licenses  
Software Development and Intellectual Property Licenses Software Development and Intellectual Property Licenses

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

 
At December 31,
 
2019
 
2018
Internally-developed software costs
$
345

 
$
291

Payments made to third-party software developers
31

 
38

Total software development costs
$
376

 
$
329



As of both December 31, 2019 and December 31, 2018, capitalized intellectual property licenses were not material.

Amortization of capitalized software development costs and intellectual property licenses was as follows (amounts in millions):

 
For the Years Ended December 31,
 
2019
 
2018
 
2017
Amortization of capitalized software development costs and intellectual property licenses
$
241

 
$
501

 
$
314



Write-offs and impairments of capitalized software development costs and intellectual property licenses were not material for the years ended December 31, 2019, 2018, and 2017.