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RATE MATTERS - FERC Rate Matters (Details) - USD ($) $ in Millions | 1 Months Ended | 12 Months Ended |
--- | --- | --- | ---
Oct. 31, 2023 | Dec. 31, 2024 | Dec. 31, 2023 | Dec. 31, 2022 | Dec. 31, 2021 | Oct. 31, 2022
Independence Energy Connection Project |  |  |  |  |  |
Public Utilities, General Disclosures [Line Items] |  |  |  |  |  |
Aep share of independence energy connection capital costs |  | $ 96.0 |  |  |  |
Request to Update AEGCo Depreciation Rates |  |  |  |  |  |
Public Utilities, General Disclosures [Line Items] |  |  |  |  |  |
Proposed revision, deprecation rates, ownership interests |  |  |  |  |  | 50.00%
FERC 2021 PJM and SPP Transmission Formula Rate Challenge |  |  |  |  |  |
Public Utilities, General Disclosures [Line Items] |  |  |  |  |  |
Stand alone treatment of nolcs annual revenue increase |  | $ 52.0 | $ 61.0 | $ 69.0 | $ 78.0 |
Request to Update SWEPCo Generation Depreciation Rates |  |  |  |  |  |
Public Utilities, General Disclosures [Line Items] |  |  |  |  |  |
Requested annual revenue requirement | $ 5.0 |  |  |  |  |

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- Details
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- Details
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