| Cover | Aug. 11, 2024 |
| Cover [Abstract] | |
| Document Type | 8-K |
| Amendment Flag | false |
| Document Period End Date | Aug. 11, 2024 |
| Current Fiscal Year End Date | --05-31 |
| Entity File Number | 333-267039 |
| Entity Registrant Name | CANNABIS BIOSCIENCE INTERNATIONAL HOLDINGS, INC. |
| Entity Central Index Key | 0001411057 |
| Entity Tax Identification Number | 84-4901299 |
| Entity Incorporation, State or Country Code | CO |
| Entity Address, Address Line One | 6201 Bonhomme Road |
| Entity Address, Address Line Two | Suite 435N |
| Entity Address, City or Town | Houston |
| Entity Address, State or Province | TX |
| Entity Address, Postal Zip Code | 77036 |
| City Area Code | 214 |
| Local Phone Number | 733-0868 |
| Written Communications | false |
| Soliciting Material | false |
| Pre-commencement Tender Offer | false |
| Pre-commencement Issuer Tender Offer | false |
| Entity Emerging Growth Company | true |
| Elected Not To Use the Extended Transition Period | false |
