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Employee Benefit Plans (Fair Value Assumptions) (Details) - $ / shares
12 Months Ended
Mar. 31, 2022
Mar. 31, 2021
Mar. 31, 2020
Employee Stock Option      
Employee Benefit Plan      
Dividend yield 1.18%    
Risk-free interest rate 1.99%    
Expected volatility 34.00%    
Expected life (years) 6 years 2 months 12 days    
Weighted average fair value (in dollars per share) $ 25.88    
Employee Stock Purchase Plans      
Employee Benefit Plan      
Dividend yield 1.03% 1.04% 1.74%
Risk-free interest rate 0.27% 0.10% 1.81%
Expected volatility 35.00% 47.00% 24.00%
Expected life (years) 6 months 6 months 6 months
Weighted average fair value (in dollars per share) $ 23.55 $ 24.67 $ 9.35
Market Based RSUs      
Employee Benefit Plan      
Dividend yield 0.78% 1.24% 1.76%
Risk-free interest rate 0.31% 0.21% 2.11%
Expected volatility 37.00% 31.00% 30.00%
Expected life (years) 3 years 3 years 3 years