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Revenue (Tables)
9 Months Ended
Sep. 30, 2025
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
September 30,
Nine Months Ended
September 30,
(in millions)2025202420252024
Certification Testing$224 $206 $628 $585 
Ongoing Certification Services252 238 747 705 
Non-certification Testing and Other Services235 220 679 639 
Software72 67 210 202 
Total $783 $731 $2,264 $2,131