v3.26.3
Stockholders' Equity - Common Stock Shares Activity (Details) - shares
shares in Millions
 3 Months Ended 9 Months Ended
Sep. 30, 2026
Sep. 30, 2025
Sep. 30, 2026
Sep. 30, 2025
Increase (Decrease) in Stockholders' Equity [Roll Forward]        
Purchases of treasury stock     (22.9) (14.7)
Common Stock | Class A        
Increase (Decrease) in Stockholders' Equity [Roll Forward]        
Balance at beginning of period 870.7 899.1 887.3 906.6
Purchases of treasury stock (5.3) (5.8) (22.9) (14.7)
Share-based payments 0.2 0.1 1.1 1.4
Conversion of Class B to Class A common stock 0.0 0.0 0.1 0.1
Balance at end of period 865.6 893.4 865.6 893.4
Common Stock | Class B        
Increase (Decrease) in Stockholders' Equity [Roll Forward]        
Balance at beginning of period 6.5 6.7 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 0.0 0.0 (0.1) (0.1)
Balance at end of period 6.5 6.7 6.5 6.7