Quarterly report [Sections 13 or 15(d)]

Stock-Based Compensation - Grants of stock options (Details)

v3.26.3
Stock-Based Compensation - Grants of stock options (Details) - USD ($)
$ / shares in Units, shares in Thousands, $ in Millions
3 Months Ended 9 Months Ended
Sep. 30, 2026
Sep. 30, 2025
Sep. 30, 2026
Sep. 30, 2025
Stock-Based Compensation        
Stock-based compensation $ 6 $ 7 $ 17 $ 15
Series C        
Stock-Based Compensation        
Options granted     181  
Series A        
Stock-Based Compensation        
Options granted     0  
Series B        
Stock-Based Compensation        
Options granted     0  
Employee Stock Option        
Stock-Based Compensation        
Dividend rate     0.00%  
Subsidiary employees | Employee Stock Option | Series C        
Stock-Based Compensation        
Options granted     181  
Vesting period     5 years  
Weighted average GDFV     $ 26.4  
Subsidiary employees | Time-based RSU | Series C        
Stock-Based Compensation        
Award granted (in shares)     72  
RSUs GDFV     $ 88.65  
Subsidiary employees | Performance based RSUs | Series C        
Stock-Based Compensation        
Award granted (in shares)     153  
RSUs GDFV     $ 105.1