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Earnings per Share - Summary of Buyback Activity by Program (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands | 3 Months Ended | 13 Months Ended
--- | --- | ---
Aug. 31, 2022 | Aug. 31, 2021 | Aug. 31, 2022
Equity, Class of Treasury Stock [Line Items] |  |  |
Stock purchased under share buyback | $ 320,334 | $ 659,235 |
Shares acquired for taxes due (in shares) | 270 | 198 |
Shares acquired for taxes due, average price (in dollars per share) | $ 405.93 | $ 394.19 |
Shares acquired for taxes due | $ 109,583 | $ 78,015 |
Total repurchase of Cintas common stock | $ 320,334 | $ 659,235 |
Share Buyback Programs |  |  |
Equity, Class of Treasury Stock [Line Items] |  |  |
Stock purchased under share buyback (in shares) | 532 | 1,590 |
Stock purchased under share buyback, average price (in dollars per share) | $ 396.39 | $ 365.41 |
Stock purchased under share buyback | $ 210,751 | $ 581,220 |
October 29, 2019 Plan |  |  |
Equity, Class of Treasury Stock [Line Items] |  |  |
Stock purchased under share buyback (in shares) | 0 | 1,590 |
Stock purchased under share buyback, average price (in dollars per share) | $ 0 | $ 365.41 |
Stock purchased under share buyback | $ 0 | $ 581,220 |
July 27, 2021 Plan |  |  |
Equity, Class of Treasury Stock [Line Items] |  |  |
Stock purchased under share buyback (in shares) | 532 | 0 | 2,700
Stock purchased under share buyback, average price (in dollars per share) | $ 396.39 | $ 0 | $ 385.66
Stock purchased under share buyback | $ 210,751 | $ 0 | $ 1,000,000
July 26, 2022 Plan |  |  |
Equity, Class of Treasury Stock [Line Items] |  |  |
Stock purchased under share buyback (in shares) | 0 | 0 |
Stock purchased under share buyback, average price (in dollars per share) | $ 0 | $ 0 |
Stock purchased under share buyback | $ 0 | $ 0 |

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