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Calculation of Earnings Per Share - Additional Information (Details)
3 Months Ended 9 Months Ended
Feb. 29, 2020
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Feb. 27, 2021
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Feb. 29, 2020
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Schedule Of Earning Per Share [Line Items]      
Limit of cash dividends Class B common stock (percent)   90.00%  
Common stock options anti-dilutive 1,000,000 1,300,000 943,000
Common Stock      
Schedule Of Earning Per Share [Line Items]      
Common stock shares, authorized   17,000,000  
Common Class B      
Schedule Of Earning Per Share [Line Items]      
Common stock shares, authorized   3,000,000  
Number of votes per share | Vote   10