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Earnings Per Share - Schedule of Buyback Activity by Program (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands | 3 Months Ended
--- | ---
Aug. 31, 2025 | Aug. 31, 2024
Equity, Class of Treasury Stock [Line Items] |  |
Shares acquired for taxes due (in shares) | 520 | 744
Shares acquired for taxes due, average price (in dollars per share) | $ 223.04 | $ 189.67
Shares acquired for taxes due | $ 116,083 | $ 141,185
Total repurchase of Cintas common stock | $ 266,097 | $ 614,802
Share Buyback Programs |  |
Equity, Class of Treasury Stock [Line Items] |  |
Shares (in shares) | 703 | 2,732
Average Price per Share (in dollars per share) | $ 213.40 | $ 173.40
Purchase Price | $ 150,014 | $ 473,617
July 26, 2022 Plan |  |
Equity, Class of Treasury Stock [Line Items] |  |
Shares (in shares) | 703 | 2,732
Average Price per Share (in dollars per share) | $ 213.40 | $ 173.40
Purchase Price | $ 150,014 | $ 473,617
July 23, 2024 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

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