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Equity - Share Repurchases, Dividends, Stock-Based Compensation (Details)
$ / shares in Units, $ in Millions
 1 Months Ended 3 Months Ended
Apr. 25, 2025
USD ($)
$ / shares
shares
Apr. 21, 2025
$ / shares
shares
Feb. 28, 2025
shares
Mar. 31, 2025
USD ($)
item
$ / shares
shares
Mar. 31, 2024
USD ($)
$ / shares
shares
Mar. 31, 2023
$ / shares
Oct. 22, 2024
USD ($)
Share Repurchase Plan              
Value of shares authorized by the Board of Directors to be repurchased under share repurchase plan | $             $ 1,500.0
Shares       922,656 0    
Average Cost Per Share | $ / shares       $ 274.41      
Amount | $       $ 253.2      
Dividends              
Number of consecutive years of quarterly cash dividends paid | item       66      
Common stock quarterly dividend per share (in dollars per share) | $ / shares       $ 1.2 $ 1.1 $ 1  
Votes per share of common stock | item       1      
Additional share-based compensation disclosures              
Total unrecognized compensation cost | $       $ 94.6      
Weighted average recognition period for unrecognized compensation cost (in years)       2 years      
Subsequent event              
Share Repurchase Plan              
Remaining value of shares authorized by the Board of Directors to be repurchased under share repurchase plan | $ $ 1,020.0            
Shares 301,279            
Average Cost Per Share | $ / shares $ 265.17            
Amount | $ $ 79.9            
Q2 2025 Dividends | Subsequent event              
Dividends              
Common stock dividend quarterly declared and paid per share (in dollars per share) | $ / shares   $ 1.2          
Dividend date of declaration   Apr. 21, 2025          
Dividend date payable   Jun. 06, 2025          
Dividend date of record   May 23, 2025          
Restricted stock units (RSUs)              
Additional share-based compensation disclosures              
Vesting period (in years)     3 years 3 years 3 years    
Changes              
Granted (in shares)     96,973        
Restricted stock units (RSUs) and performance stock units (PSUs)              
Common Stock and Additional Paid-In (in Shares)              
Shares withheld related to share settlements | $       $ 11.5 $ 23.9    
Changes              
Unvested as of the beginning of the period (in units) 485,950 485,950   327,017      
Granted (in shares)       162,900      
Vested (in units)       (425)      
Cancelled or forfeited (in units)       (3,542)      
Unvested as of the end of the period (in units)       485,950      
Shares reserved for future grants (all plans)       1,223,658      
Weighted Average Grant Date Fair Value              
Unvested as of the beginning of the period (in dollars per unit) | $ / shares $ 278.48 $ 278.48   $ 267.96      
Granted (in dollars per unit) | $ / shares       299.38      
Vested (in dollars per unit) | $ / shares       261.27      
Cancelled or forfeited (in dollars per unit) | $ / shares       270.78      
Unvested as of the end of the period (in dollars per unit) | $ / shares       $ 278.48      
Performance stock units (PSUs)              
Additional share-based compensation disclosures              
Vesting period (in years)     3 years 3 years 3 years    
Return on assets result period     3 years 3 years 3 years    
Changes              
Granted (in shares)     65,927        
Performance stock units (PSUs) | Maximum              
Stock Based Compensation              
Share of Common Stock     2 2 2