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Equity Compensation Plans (Tables)
9 Months Ended
Feb. 28, 2021
Stock Option Activity A summary of stock option activity during the nine months ended February 28, 2021 follows:
 
(Options in thousands)
  
Shares
    
Weighted-
Average
Exercise Price
 
Options outstanding June 1, 2020
     2,162      $  55.96  
Granted
     261        68.47  
Exercised
     (491      44.91  
Forfeited
     (179      57.58  
    
 
 
          
Options outstanding February 28, 2021
     1,753      $ 58.41  
Fair Value of Stock Options Granted Estimated Weighted-Average Assumptions The fair value of stock options granted was estimated using the following weighted-average assumptions.
 
    
FY2021
 
Risk-free interest rate
     0.2
Expected dividend yield
     0.0
Expected stock price volatility
     31.3
Expected option life
     3.25 years