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Earnings per Share - Summary of Buyback Activity by Program (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands | 12 Months Ended
--- | ---
May 31, 2022 | May 31, 2021 | May 31, 2020
Equity, Class of Treasury Stock [Line Items] |  |  |
Purchase Price | $ 1,525,873 | $ 554,121 | $ 464,518
Shares acquired for taxes due (in shares) | 305 | 246 | 264
Shares acquired for taxes due, average price (in dollars per share) | $ 397.16 | $ 302.52 | $ 260.89
Shares acquired for taxes due | $ 121,224 | $ 74,465 | $ 68,837
Total repurchase of Cintas common stock | $ 1,525,873 | $ 554,121 | $ 464,518
Share Repurchase Programs |  |  |
Equity, Class of Treasury Stock [Line Items] |  |  |
Shares (in shares) | 3,740 | 1,386 | 1,607
Average Price per Share (in dollars per share) | $ 375.53 | $ 346.13 | $ 246.19
Purchase Price | $ 1,404,649 | $ 479,656 | $ 395,681
Share Buyback Program October 2018 |  |  |
Equity, Class of Treasury Stock [Line Items] |  |  |
Shares (in shares) | 0 | 190 | 1,607
Average Price per Share (in dollars per share) | $ 0 | $ 319.88 | $ 246.19
Purchase Price | $ 0 | $ 60,877 | $ 395,681
Share Buyback Program October 2019 |  |  |
Equity, Class of Treasury Stock [Line Items] |  |  |
Shares (in shares) | 1,590 | 1,196 | 0
Average Price per Share (in dollars per share) | $ 365.41 | $ 350.31 | $ 0
Purchase Price | $ 581,220 | $ 418,779 | $ 0
Share Buyback Program July 27 2021 |  |  |
Equity, Class of Treasury Stock [Line Items] |  |  |
Shares (in shares) | 2,150 | 0 | 0
Average Price per Share (in dollars per share) | $ 383.01 | $ 0 | $ 0
Purchase Price | $ 823,429 | $ 0 | $ 0

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