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Investments (Tables)
 6 Months Ended
Nov. 30, 2022
Investments, Debt and Equity Securities [Abstract]  
Summary of Investments
Cintas' investments are summarized as follows:
(In thousands)November 30,
2022		May 31,
2022
Cash surrender value of insurance policies$238,637 $237,136 
Other investments4,937 5,737 
Total investments$243,574 $242,873