Annual report pursuant to Section 13 and 15(d)

Employee Benefit Plans (Narrative) (Details)

v3.22.2
Employee Benefit Plans (Narrative) (Details) - USD ($)
$ in Millions
12 Months Ended
May 31, 2022
May 31, 2021
May 31, 2020
Deferred Compensation Plans [Member]      
Defined Contribution Plan Disclosure [Line Items]      
Percentage of annual base salary and bonus that eligible employees may defer 50.00%    
Percentage of Board cash compensation that eligible outside directors may defer 100.00%    
Amounts accrued under deferred compensation plans $ 29.9 $ 32.6  
401(K) Plan [Member]      
Defined Contribution Plan Disclosure [Line Items]      
Maximum percentage of salary deferral 50.00%    
Years of service to be eligible for matching contribution 1 year    
Minimum number of hours worked for eligibility 1,000    
Employer's matching contribution as a percent of the first 3% of employees' salary contributed 100.00%    
Percentage of employees' salary contributed matched 100% by employer 3.00%    
Employer's matching contribution as a percent of the next 2% of employees' salary contributed 50.00%    
Percentage of employees' salary contributed matched 50% by employer 2.00%    
Total percentage of employees' salary contributed matched by employer 4.00%    
Company contributions to the plan $ 35.6 $ 19.2 $ 30.1
Percentage participant directed 100.00%