| Cover | Mar. 20, 2023 |
| Cover [Abstract] | |
| Document Type | 8-K |
| Amendment Flag | false |
| Document Period End Date | Mar. 20, 2023 |
| Entity File Number | 1-1232 |
| Entity Registrant Name | DUKE ENERGY OHIO, INC. |
| Entity Central Index Key | 0000020290 |
| Entity Tax Identification Number | 31-0240030 |
| Entity Incorporation, State or Country Code | OH |
| Entity Address, Address Line One | 139 East Fourth Street |
| Entity Address, City or Town | Cincinnati |
| Entity Address, State or Province | OH |
| Entity Address, Postal Zip Code | 45202 |
| City Area Code | 704 |
| Local Phone Number | 382-3853 |
| Written Communications | false |
| Soliciting Material | false |
| Pre-commencement Tender Offer | false |
| Pre-commencement Issuer Tender Offer | false |
| Entity Emerging Growth Company | false |
