FINANCING ACTIVITIES - Dividend Restrictions Narrative (Details) |
9 Months Ended |
|---|---|
Sep. 30, 2026 | |
| Dividends Payable [Line Items] | |
| Maximum percentage debt to capitalization | 67.50% |
| I&M | |
| Dividends Payable [Line Items] | |
| Maximum percentage debt to capitalization | 67.50% |
| AEP Texas | |
| Dividends Payable [Line Items] | |
| Maximum percentage debt to capitalization | 67.50% |
| APCo | |
| Dividends Payable [Line Items] | |
| Maximum percentage debt to capitalization | 67.50% |
| SWEPCo | |
| Dividends Payable [Line Items] | |
| Maximum percentage debt to capitalization | 67.50% |
| PSO | |
| Dividends Payable [Line Items] | |
| Maximum percentage debt to capitalization | 67.50% |
| AEPTCo | |
| Dividends Payable [Line Items] | |
| Maximum percentage debt to capitalization | 67.50% |