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Investments (Tables)
 3 Months Ended
Aug. 31, 2022
Investments, Debt and Equity Securities [Abstract]  
Summary of Investments
Cintas' investments are summarized as follows:
(In thousands)August 31,
2022		May 31,
2022
Cash surrender value of insurance policies$233,650 $237,136 
Other investments5,685 5,737 
Total investments$239,335 $242,873