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Stock-Based Compensation - Summary of Changes in Restricted Stock Units and Market Share Units (Detail) - $ / shares
12 Months Ended
Mar. 31, 2024
Mar. 31, 2023
Mar. 31, 2022
Weighted average grant date fair value      
Weighted Average Grant Date Fair Value, Granted (usd per share) $ 94.34 $ 66.90 $ 88.27
Restricted Stock Units  (RSU)      
Number of RSU and MSU      
Number of Non-vested awards, Beginning Balance (in shares) 1,009,783    
Number of units, Granted (in shares) 299,284    
Number of units, Stock dividend (in shares) 8,987    
Number of units, Vested (in shares) (262,315)    
Number of units, Forfeitures (in shares) (32,903)    
Number of Non-vested awards, Ending Balance (in shares) 1,022,836 1,009,783  
Weighted average grant date fair value      
Weighted Average Grant Date Fair Value, Non-vested awards, Beginning Balance (usd per share) $ 65.48    
Weighted Average Grant Date Fair Value, Granted (usd per share) 92.44    
Weighted Average Grant Date Fair Value, Stock dividend (usd per share) 68.55    
Weighted Average Grant Date Fair Value, Vested (usd per share) 72.63    
Weighted Average Grant Date Fair Value, Forfeitures (usd per share) 79.36    
Weighted Average Grant Date Fair Value, Non-vested awards, Ending Balance (usd per share) $ 69.24 $ 65.48  
Market condition-based Share Units (TSR)      
Number of RSU and MSU      
Number of Non-vested awards, Beginning Balance (in shares) 31,653    
Number of units, Granted (in shares) 0    
Number of units, Stock dividend (in shares) 61    
Number of units, Vested (in shares) (30,582)    
Number of units, Forfeitures (in shares) 0    
Number of Non-vested awards, Ending Balance (in shares) 1,132 31,653  
Weighted average grant date fair value      
Weighted Average Grant Date Fair Value, Non-vested awards, Beginning Balance (usd per share) $ 62.19    
Weighted Average Grant Date Fair Value, Granted (usd per share) 0    
Weighted Average Grant Date Fair Value, Stock dividend (usd per share) 62.80    
Weighted Average Grant Date Fair Value, Vested (usd per share) 62.02    
Weighted Average Grant Date Fair Value, Forfeitures (usd per share) 0    
Weighted Average Grant Date Fair Value, Non-vested awards, Ending Balance (usd per share) $ 66.89 $ 62.19