Stock-Based Compensation (Tables)

12 Months Ended

May 31, 2024

Share-Based Payment Arrangement, Noncash Expense [Abstract]

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:

	2024		2023		2022
Risk-free interest rate	3.9	%	2.8	%	0.8	%
Dividend yield	1.1	%	1.1	%	1.2	%
Expected volatility of Cintas' common stock	26.9	%	26.0	%	25.2	%
Expected life of the option in years	5.5		5.5		5.5

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, 2021 (1,548,867 shares exercisable)	6,055,524	$	191.11
Granted	531,963	398.92
Canceled	(877)	116.25
Forfeited	(260,249)	273.53
Exercised	(1,238,959)	118.21
Outstanding, May 31, 2022 (1,575,999 shares exercisable)	5,087,402	230.62
Granted	579,146	464.91
Canceled	(1,710)	65.79
Forfeited	(162,598)	339.49
Exercised	(1,074,488)	145.19
Outstanding, May 31, 2023 (1,546,346 shares exercisable)	4,427,752	278.01
Granted	408,497	662.31
Canceled	—	—
Forfeited	(110,593)	411.35
Exercised	(913,398)	171.64
Outstanding, May 31, 2024 (1,385,992 shares exercisable)	3,812,258	$	342.91

Schedule of Information Related to Stock Options Outstanding

The following table summarizes the information related to stock options outstanding at May 31, 2024:

		Outstanding Options			Exercisable Options
Range of Exercise Prices	Number Outstanding	Average Remaining Option Life	Weighted Average Exercise Price		Number Exercisable	Weighted Average Exercise Price
$63.45 - $206.99	1,012,683	3.11	$	152.06	1,006,059	$	151.83
$213.37 - $388.19	924,792	5.76	282.38		368,646	270.37
$388.86 - $397.83	951,732	7.55	392.50		587	388.86
$401.47 - $687.03	923,051	9.43	561.79		10,700	422.39
$63.45 - $687.03	3,812,258	6.39	$	342.91	1,385,992	$	185.55

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 2016 Plan or under previously adopted plans:

	Shares	Weighted Average Grant Price
Outstanding, unvested grants at June 1, 2021	1,241,223	$	264.63
Granted	189,874	398.30
Forfeited	(66,589)	323.00
Vested	(527,899)	213.36
Outstanding, unvested grants at May 31, 2022	836,609	331.95
Granted	187,750	470.11
Forfeited	(51,200)	384.61
Vested	(286,529)	267.65
Outstanding, unvested grants at May 31, 2023	686,630	392.02
Granted	173,194	673.55
Forfeited	(44,838)	432.79
Vested	(161,960)	301.83
Outstanding, unvested grants at May 31, 2024	653,026	$	490.32