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Investments (Tables)
 9 Months Ended
Feb. 28, 2023
Investments, Debt and Equity Securities [Abstract]  
Summary of Investments
Cintas' investments are summarized as follows:
(In thousands)February 28,
2023		May 31,
2022
Cash surrender value of insurance policies$237,423 $237,136 
Other investments4,373 5,737 
Total investments$241,796 $242,873