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Stock-Based Compensation - Long-Term Incentive Plan Awards (Details) - LTIP PSUs - Stock Incentive Plan 2015 - $ / shares
12 Months Ended 36 Months Ended 48 Months Ended
Mar. 31, 2023
Mar. 31, 2022
Mar. 31, 2021
Mar. 31, 2024
Mar. 31, 2024
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Granted (in shares) 65,470 69,644 39,780    
Granted (in dollars per share) $ 330.70 $ 358.75 $ 376.45    
2023          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Number of measurement reporting periods 3 years        
Granted (in shares) 32,735        
Granted (in dollars per share) $ 387.44        
2023 | Share-based Payment Arrangement, Tranche One          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Award requisite service period (in months) 24 months        
2023 | Share-based Payment Arrangement, Tranche Two          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Award requisite service period (in months) 24 months        
2023 | Share-Based Payment Arrangement, Tranche Three          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Award requisite service period (in months) 36 months        
2023 | Minimum          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Award vesting period (in years) 2 years        
2023 | Maximum          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Award vesting period (in years) 3 years        
Award vesting rights percentage 200.00%        
2022          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Award vesting period (in years)   3 years      
Number of measurement reporting periods   3 years      
Granted (in shares)   34,822      
Granted (in dollars per share)   $ 407.37      
2022 | Forecast          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Award vesting rights percentage       100.00%  
2021          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Number of measurement reporting periods     3 years    
Granted (in shares)     19,890    
Granted (in dollars per share)     $ 376.45    
2021 | Forecast          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Award vesting rights percentage         200.00%
2021 | Share-based Payment Arrangement, Tranche One          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Award vesting period (in years)     2 years    
Award requisite service period (in months)     24 months    
2021 | Share-based Payment Arrangement, Tranche Two          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Award vesting period (in years)     3 years    
Award requisite service period (in months)     24 months    
2021 | Share-Based Payment Arrangement, Tranche Three          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Award requisite service period (in months)     36 months    
2021 | Maximum          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Award vesting rights percentage     200.00%