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Equity Compensation Plans (Tables)
3 Months Ended
Aug. 31, 2020
Stock Option Activity A summary of stock option activity during the three months ended August 31, 2020 follows:
 
           
Weighted-
 
           
Average
 
(Options in thousands)
  
Shares
    
Exercise Price
 
Options outstanding June 1, 2020
     2,162      $ 55.96  
Granted
             
Exercised
     (86      48.39  
Forfeited
     (7      57.81  
  
 
 
    
Options outstanding August 31, 2020
     2,069      $ 56.27  
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.
    
FY 2020
 
Risk-free interest rate
     1.9
Expected dividend yield
     0.0
Expected stock price volatility
     29.4
Expected option life
 
 
3.5
 
years