v3.26.3
Earnings Per Share - Schedule of Buyback Activity by Program (Details) - USD ($)
$ / shares in Units, shares in Thousands, $ in Thousands
 3 Months Ended
Aug. 31, 2026
Aug. 31, 2025
Equity, Class of Treasury Stock [Line Items]    
Shares acquired for taxes due (in shares) 395 520
Shares acquired for taxes due, average price (in dollars per share) $ 202.07 $ 223.04
Shares acquired for taxes due $ 79,810 $ 116,083
Total repurchase of Cintas common stock $ 315,710 $ 266,097
Share Buyback Programs    
Equity, Class of Treasury Stock [Line Items]    
Shares (in shares) 1,180 703
Average Price per Share (in dollars per share) $ 199.93 $ 213.40
Purchase Price $ 235,900 $ 150,014
July 26, 2022 Plan    
Equity, Class of Treasury Stock [Line Items]    
Shares (in shares) 0 703
Average Price per Share (in dollars per share) $ 0 $ 213.40
Purchase Price $ 0 $ 150,014
July 23, 2024 Plan    
Equity, Class of Treasury Stock [Line Items]    
Shares (in shares) 1,180 0
Average Price per Share (in dollars per share) $ 199.93 $ 0
Purchase Price $ 235,900 $ 0
October 28, 2025 Plan    
Equity, Class of Treasury Stock [Line Items]    
Shares (in shares) 0 0
Average Price per Share (in dollars per share) $ 0 $ 0
Purchase Price $ 0 $ 0