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Software Development and Intellectual Property Licenses
12 Months Ended
Dec. 31, 2020
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,
 20202019
Internally-developed software costs$485 $345 
Payments made to third-party software developers27 31 
Total software development costs$512 $376 

As of both December 31, 2020 and December 31, 2019, 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,
 202020192018
Amortization of capitalized software development costs and intellectual property licenses
$263 $241 $501