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Software Development and Intellectual Property Licenses
12 Months Ended
Dec. 31, 2021
Software Development Costs and Intellectual Property Licenses  
Software Development and Intellectual Property Licenses
5. Software Development and Intellectual Property Licenses

Our total capitalized software development costs of $660 million and $512 million, as of December 31, 2021 and December 31, 2020, respectively, primarily relate to internal development costs. As of both December 31, 2021 and December 31, 2020, 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,
 202120202019
Amortization of capitalized software development costs and intellectual property licenses$341 $263 $241