RATE MATTERS - FERC Rate Matters (Details) $ in Millions |
Jun. 30, 2026
USD ($)
|
May 31, 2026
filing
|
Jun. 30, 2025
order
|
Jan. 31, 2024
order
|
|---|---|---|---|---|
| Public Utilities, General Disclosures [Line Items] | ||||
| Number of order FERC issues | order | 2 | 2 | ||
| Independence Energy Connection Project | ||||
| Public Utilities, General Disclosures [Line Items] | ||||
| AEP share of independence energy connection capital costs | $ | $ 97 | |||
| Transource Energy | ||||
| Public Utilities, General Disclosures [Line Items] | ||||
| FERC matters, petition, number of filings requested to be consolidated | filing | 3 |