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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 | 6 Months Ended | 16 Months Ended
--- | --- | --- | ---
Nov. 30, 2022 | Aug. 31, 2022 | Nov. 30, 2021 | Aug. 31, 2021 | Nov. 30, 2022 | Nov. 30, 2021 | Nov. 30, 2022
Equity, Class of Treasury Stock [Line Items] |  |  |  |  |  |  |
Stock purchased under share buyback | $ 28,348 | $ 320,334 | $ 5,491 | $ 659,235 |  |  |
Shares acquired for taxes due (in shares) | 56 |  | 13 |  | 326 | 211 |
Shares acquired for taxes due, average price (in dollars per share) | $ 423.64 |  | $ 420.87 |  | $ 408.97 | $ 395.84 |
Shares acquired for taxes due | $ 23,665 |  | $ 5,483 |  | $ 133,248 | $ 83,506 |
Total repurchase of Cintas common stock | $ 28,348 |  | $ 5,483 |  | $ 348,682 | $ 664,726 |
Share Buyback Programs |  |  |  |  |  |  |
Equity, Class of Treasury Stock [Line Items] |  |  |  |  |  |  |
Stock purchased under share buyback (in shares) | 12 |  | 0 |  | 544 | 1,590 |
Stock purchased under share buyback, average price (in dollars per share) | $ 377.66 |  | $ 0 |  | $ 395.97 | $ 365.41 |
Stock purchased under share buyback | $ 4,683 |  | $ 0 |  | $ 215,434 | $ 581,220 |
July 27, 2021 Plan |  |  |  |  |  |  |
Equity, Class of Treasury Stock [Line Items] |  |  |  |  |  |  |
Stock purchased under share buyback (in shares) | 12 |  | 0 |  | 544 | 0 | 2,700
Stock purchased under share buyback, average price (in dollars per share) | $ 377.66 |  | $ 0 |  | $ 395.97 | $ 0 | $ 385.62
Stock purchased under share buyback | $ 4,683 |  | $ 0 |  | $ 215,434 | $ 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 |  |
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 |

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