| Cover | Mar. 27, 2024 |
| Cover [Abstract] | |
| Document Type | 8-K |
| Amendment Flag | false |
| Document Period End Date | Mar. 27, 2024 |
| Entity Registrant Name | Cintas Corp |
| Entity Central Index Key | 0000723254 |
| Entity Incorporation, State or Country Code | WA |
| Entity File Number | 0-11399 |
| Entity Tax Identification Number | 31-1188630 |
| Entity Address, Address Line One | 6800 Cintas Boulevard, P.O. Box 625737, |
| Entity Address, City or Town | Cincinnati, |
| Entity Address, State or Province | OH |
| Entity Address, Postal Zip Code | 45262-5737 |
| City Area Code | 513 |
| Local Phone Number | 459-1200 |
| Written Communications | false |
| Soliciting Material | false |
| Pre-commencement Tender Offer | false |
| Pre-commencement Issuer Tender Offer | false |
| Title of 12(b) Security | Common stock, no par value |
| Trading Symbol | CTAS |
| Security Exchange Name | NASDAQ |
| Entity Emerging Growth Company | false |
