v3.25.3
Net Income Per Share (Details) - USD ($)
$ / shares in Units, shares in Thousands, $ in Millions
 3 Months Ended 9 Months Ended
Sep. 30, 2025
Jun. 30, 2025
Mar. 31, 2025
Sep. 30, 2024
Jun. 30, 2024
Mar. 31, 2024
Sep. 30, 2025
Sep. 30, 2024
Dec. 31, 2024
Dec. 31, 2023
Numerator:                    
Net income $ 79 $ 255 $ 298 $ 326 $ 301 $ 301 $ 632 $ 928    
Denominator:                    
Shares outstanding at the beginning of the period (in shares)   53,600     58,100       55,000 57,800
Weighted-average number of shares issued:                    
Stock-based compensation (in shares) 0     0     200 200    
Stock purchases (in shares) (1,100)     (500)     (1,700) (200)    
Denominator for basic net income per share (in shares) 52,500     57,600     53,500 57,800    
Effect of dilutive securities:                    
Stock-based compensation (in shares) 0     100     100 300    
Denominator for diluted net income per share (in shares) 52,500     57,700     53,600 58,100    
Net income per share:                    
Net income per share - Basic (in dollars per share) $ 1.51     $ 5.67     $ 11.81 $ 16.05    
Net income per share - Diluted (in dollars per share) $ 1.51     $ 5.65     $ 11.79 $ 15.97    
Potentially dilutive common shares (in shares) 532     196     265 102