FINANCING ACTIVITIES - Schedule of Maximum Minimum and Average Interest Rates for Funds Borrowed from and Loaned to AEP (Details) - Direct Borrowing - AEPTCo |
9 Months Ended | |
|---|---|---|
Sep. 30, 2026 |
Sep. 30, 2025 |
|
| Short-Term Debt [Line Items] | ||
| Maximum Interest Rate for Funds Borrowed | 4.22% | 4.76% |
| Minimum Interest Rate For Funds Borrowed | 3.83% | 4.27% |
| Maximum Interest Rate for Funds Loaned | 4.22% | 4.76% |
| Minimum Interest Rate for Funds Loaned | 3.83% | 4.27% |
| Average Interest Rate for Funds Borrowed | 3.99% | 4.64% |
| Average Interest Rate for Funds Loaned | 4.02% | 4.64% |