| Cover | Jan. 20, 2022 |
| Cover [Abstract] | |
| Document Type | 8-K |
| Document Period End Date | Jan. 20, 2022 |
| Entity Registrant Name | CARDINAL ETHANOL, LLC |
| Entity Incorporation, State or Country Code | IN |
| Entity File Number | 000-53036 |
| Entity Tax Identification Number | 20-2327916 |
| Entity Address, Address Line One | 1554 N. County Road 600 E. |
| Entity Address, City or Town | Union City |
| Entity Address, State or Province | IN |
| Entity Address, Postal Zip Code | 47390 |
| City Area Code | 765 |
| Local Phone Number | 964-3137 |
| Written Communications | false |
| Soliciting Material | false |
| Pre-commencement Tender Offer | false |
| Pre-commencement Issuer Tender Offer | false |
| Entity Emerging Growth Company | false |
| Amendment Flag | false |
| Entity Central Index Key | 0001352081 |
