v3.26.1
Stock-based Compensation - Equity Incentive Plan (Details) - USD ($)
$ / shares in Units, $ in Millions
12 Months Ended
Mar. 31, 2026
Mar. 31, 2025
Mar. 31, 2024
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Repurchase of common stock [1] $ 591.0 $ 804.0 $ 418.0
Class A Common Stock      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Repurchase of common stock (in shares) 5,600,000 5,600,000 3,200,000
Repurchase of common stock $ 561.0 $ 764.0 $ 373.0
Amended and Restated Equity Incentive Plan      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Stock options outstanding, unvested (in shares) 100,000 100,000  
Outstanding, weighted average grant date fair value (in dollars per share) $ 24.37 $ 20.60  
Stock options outstanding (in shares) 500,000 700,000  
Outstanding, weighted average exercise price (in dollars per share) $ 73.63 $ 69.88  
Repurchase of common stock (in shares) 300,000    
Repurchase of common stock $ 25.5    
Employee Stock Option | Amended and Restated Equity Incentive Plan      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Options available for future grant (in shares) 4,300,000 5,100,000  
Stock option expiration period 10 years    
Stock option vesting period 5 years    
Restricted Stock | Amended and Restated Equity Incentive Plan      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Restricted stock granted (in shares) 860,646    
Aggregate fair value of all awards issued $ 78.0 $ 81.0 $ 86.0
Granted (in dollars per share) $ 104.11 $ 151.85 $ 98.94
Restricted Stock | Amended and Restated Equity Incentive Plan | Director | Class A Common Stock      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Stock option vesting period 1 year    
Restricted Stock | Annual Incentive Plan | Officer | Class A Common Stock      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Stock option vesting period 3 years    
Stock issued upon conversion (in shares) 1    
Restricted Stock | Annual Incentive Plan | Director | Class A Common Stock      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Stock option vesting period 3 years    
Restricted Stock Units (RSUs) | Amended and Restated Equity Incentive Plan      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Stock option vesting period 3 years    
Restricted Stock Units (RSUs) | Amended and Restated Equity Incentive Plan | Class A Common Stock      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Restricted stock granted (in shares) 900,000    
Aggregate fair value of all awards issued $ 90.0    
[1] During fiscal 2026, 2025, and 2024, the Company purchased 5.6 million, 5.6 million and 3.2 million shares, respectively, of the Company’s Class A Common Stock for $561 million, $764 million, and $373 million, respectively. Additionally, during fiscal 2026, 2025, and 2024, the Company repurchased shares for $30 million, $40 million and $45 million, respectively, to cover the minimum statutory taxes on repurchases and restricted stock units that vested on various dates during those years.