v3.25.2
Revenue - Major Service Categories (Details) - USD ($)
$ in Millions
3 Months Ended 6 Months Ended
Jun. 30, 2025
Jun. 30, 2024
Jun. 30, 2025
Jun. 30, 2024
Revenue from External Customer [Line Items]        
Revenue $ 776 $ 730 $ 1,481 $ 1,400
Certification Testing        
Revenue from External Customer [Line Items]        
Revenue 215 203 404 379
Ongoing Certification Services        
Revenue from External Customer [Line Items]        
Revenue 250 234 495 467
Non-certification Testing and Other Services        
Revenue from External Customer [Line Items]        
Revenue 241 225 444 419
Software        
Revenue from External Customer [Line Items]        
Revenue $ 70 $ 68 $ 138 $ 135