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Revenue (Tables)
6 Months Ended
Jun. 30, 2024
Revenue from Contract with Customer [Abstract]  
Summary of Revenue by Major Customer Category
The table below summarizes the major service categories from which the Company derives its revenues:
Three Months Ended
June 30,
Six Months Ended
June 30,
(in millions)2024202320242023
Certification Testing$203 $188 $379 $349 
Ongoing Certification Services234 217 467 436 
Non-certification Testing and Other Services225 216 419 398 
Software68 68 135 135 
Total $730 $689 $1,400 $1,318