Stock-Based Compensation (Tables)
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12 Months Ended |
May 31, 2026 |
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| Share-Based Payment Arrangement, Noncash Expense [Abstract] |
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| Schedule of Assumptions Used to Determine Fair Value of Options |
The fair value of options was estimated at the date of grant using a Black-Scholes option-pricing model with the following assumptions for the fiscal years ended May 31: | | | | | | | | | | | | | | | | | | | 2026 | | 2025 | | 2024 | | | | | | | | Risk-free interest rate | 4.0% | | 4.3% | | 3.9% | | Dividend yield | 0.9% | | 1.1% | | 1.1% | | Expected volatility of Cintas' common stock | 26.8% | | 26.5% | | 26.9% | | Expected life of the option in years | 5.5 | | 5.5 | | 5.5 |
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| Schedule of Stock Options Granted and Outstanding |
The information presented in the following table relates primarily to stock options granted and outstanding under either the 2016 Plan or under previously adopted plans: | | | | | | | | | | | | | Shares | | Weighted
Average
Exercise Price | | | | | Outstanding, June 1, 2023 (6,185,384 shares exercisable) | 17,711,008 | | | $ | 69.50 | | | Granted | 1,633,988 | | | 165.58 | | | Canceled | — | | | — | | | Forfeited | (442,372) | | | 102.84 | | | Exercised | (3,653,592) | | | 42.91 | | Outstanding, May 31, 2024 (5,543,968 shares exercisable) | 15,249,032 | | | 85.73 | | | Granted | 1,050,217 | | | 222.76 | | | Canceled | — | | | — | | | Forfeited | (622,472) | | | 142.77 | | | Exercised | (2,998,290) | | | 53.30 | | Outstanding, May 31, 2025 (4,870,890 shares exercisable) | 12,678,487 | | | 103.72 | | | Granted | 1,186,657 | | | 201.51 | | | Canceled | — | | | — | | | Forfeited | (305,433) | | | 156.46 | | | Exercised | (2,054,262) | | | 63.08 | | Outstanding, May 31, 2026 (4,708,646 shares exercisable) | 11,505,449 | | | $ | 116.58 | |
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| Schedule of Information Related to Stock Options Outstanding |
The following table summarizes the information related to stock options outstanding at May 31, 2026: | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Outstanding Options | | Exercisable Options | Range of
Exercise Prices | Number
Outstanding | | Average
Remaining
Option Life | | Weighted
Average
Exercise Price | | Number
Exercisable | | Weighted
Average
Exercise Price | $27.10 - $73.39 | 3,209,465 | | 2.66 | | $ | 56.04 | | | 3,209,465 | | | $ | 56.04 | | $73.40 - $99.46 | 3,075,179 | | 5.56 | | 97.31 | | | 1,361,554 | | | 96.04 | | $99.47 - $187.12 | 2,130,975 | | 7.17 | | 124.32 | | | 127,212 | | | 110.73 | | $187.13 - $225.79 | 3,089,830 | | 9.14 | | 193.30 | | | 10,415 | | | 206.71 | | $27.10 - $225.79 | 11,505,449 | | 6.01 | | $ | 116.58 | | | 4,708,646 | | | $ | 69.42 | |
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| Schedule of Restricted Stock Awards Granted and Outstanding |
The information presented in the following table relates to restricted stock awards granted and outstanding under either the Amended 2016 Plan or under previously adopted plans: | | | | | | | | | | | | | Shares | | Weighted
Average
Grant Price | | | | | | Outstanding, unvested grants at June 1, 2023 | 2,746,520 | | | $ | 98.01 | | | Granted | 692,776 | | | 168.39 | | | Forfeited | (179,352) | | | 108.20 | | | Vested | (647,840) | | | 75.46 | | | Outstanding, unvested grants at May 31, 2024 | 2,612,104 | | | 122.58 | | | Granted | 428,098 | | | 224.94 | | | Forfeited | (163,748) | | | 158.26 | | | Vested | (839,453) | | | 100.95 | | | Outstanding, unvested grants at May 31, 2025 | 2,037,001 | | | 155.77 | | | Granted | 486,377 | | | 171.86 | | | Forfeited | (97,827) | | | 182.23 | | | Vested | (547,050) | | | 104.41 | | | Outstanding, unvested grants at May 31, 2026 | 1,878,501 | | | $ | 146.48 | |
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