| Cover | Jan. 06, 2022 |
| Cover [Abstract] | |
| Document Type | 8-K |
| Amendment Flag | false |
| Document Period End Date | Jan. 6, 2022 |
| Current Fiscal Year End Date | --08-31 |
| Entity File Number | 333-146404 |
| Entity Registrant Name | CANNABIS GLOBAL, INC. |
| Entity Central Index Key | 0001413488 |
| Entity Tax Identification Number | 99-0539775 |
| Entity Incorporation, State or Country Code | NV |
| Entity Address, Address Line One | 520 S. Grand Avenue |
| Entity Address, Address Line Two | Suite 320 |
| Entity Address, City or Town | Los Angeles |
| Entity Address, State or Province | CA |
| Entity Address, Postal Zip Code | 90071 |
| City Area Code | (310) |
| Local Phone Number | 986-4929 |
| Written Communications | false |
| Soliciting Material | false |
| Pre-commencement Tender Offer | false |
| Pre-commencement Issuer Tender Offer | false |
| Title of 12(b) Security | Common |
| Trading Symbol | CBGL |
| Entity Emerging Growth Company | true |
| Elected Not To Use the Extended Transition Period | true |
