v3.26.1
Stockholders' Equity - Common Stock Shares Activity (Details) - shares
shares in Millions
 3 Months Ended 6 Months Ended
Jun. 30, 2026
Jun. 30, 2025
Jun. 30, 2026
Jun. 30, 2025
Increase (Decrease) in Stockholders' Equity [Roll Forward]        
Purchases of treasury stock     (17.6) (8.9)
Common Stock | Class A        
Increase (Decrease) in Stockholders' Equity [Roll Forward]        
Balance at beginning of period 880.3 903.0 887.3 906.6
Purchases of treasury stock (9.8) (4.2) (17.6) (8.9)
Share-based payments 0.1 0.2 0.9 1.3
Conversion of Class B to Class A common stock 0.1 0.1 0.1 0.1
Balance at end of period 870.7 899.1 870.7 899.1
Common Stock | Class B        
Increase (Decrease) in Stockholders' Equity [Roll Forward]        
Balance at beginning of period 6.6 6.8 6.6 6.8
Purchases of treasury stock 0.0 0.0 0.0 0.0
Share-based payments 0.0 0.0 0.0 0.0
Conversion of Class B to Class A common stock (0.1) (0.1) (0.1) (0.1)
Balance at end of period 6.5 6.7 6.5 6.7