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Rate Matters FERC (Details) - USD ($) $ in Millions | 1 Months Ended | 12 Months Ended
--- | --- | ---
Jan. 31, 2024 | Dec. 31, 2023 | Dec. 31, 2022 | Dec. 31, 2021
Independence Energy Connection Project [Member] |  |  |  |
Public Utilities, General Disclosures [Line Items] |  |  |  |
AEP Share of Independence Energy Connection Capital Costs |  | $ 93.0 |  |
FERC 2021 PJM and SPP Transmission Formula Rate Challenge [Member] |  |  |  |
Public Utilities, General Disclosures [Line Items] |  |  |  |
Stand Alone Treatment of NOLCs Annual Revenue Increase |  | 60.0 | $ 69.0 | $ 78.0
FERC 2021 PJM and SPP Transmission Formula Rate Challenge [Member] | Subsequent Event [Member] |  |  |  |
Public Utilities, General Disclosures [Line Items] |  |  |  |
PreTax Net Income Reduction | $ 76.0 |  |  |
Request to Update SWEPCo Generation Depreciation Rates [Member] |  |  |  |
Public Utilities, General Disclosures [Line Items] |  |  |  |
Requested Annual Revenue Requirement |  | 5.0 |  |
Ohio Power Co [Member] | FERC RTO Incentive Complaint [Member] |  |  |  |
Public Utilities, General Disclosures [Line Items] |  |  |  |
RTO Incentive 50 Basis Point Refund |  | $ 5.0 |  |
Ohio Power Co [Member] | Ohio Transmission Company [Member] | FERC RTO Incentive Complaint [Member] |  |  |  |
Public Utilities, General Disclosures [Line Items] |  |  |  |
Basis Point RTO Incentive |  | 50.00% |  |
Ohio Transmission Company [Member] | FERC RTO Incentive Complaint [Member] |  |  |  |
Public Utilities, General Disclosures [Line Items] |  |  |  |
RTO Incentive 50 Basis Point Refund |  | $ 13.0 |  |
AEP Transmission Co [Member] | FERC 2021 PJM and SPP Transmission Formula Rate Challenge [Member] | Subsequent Event [Member] |  |  |  |
Public Utilities, General Disclosures [Line Items] |  |  |  |
PreTax Net Income Reduction | $ 74.0 |  |  |

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