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Rate Matters FERC (Details) - USD ($) $ in Millions | 9 Months Ended | 12 Months Ended
--- | --- | ---
Sep. 30, 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 | $ 94.0 |  |  |
Request to Update SWEPCo Generation Depreciation Rates [Member] |  |  |  |
Public Utilities, General Disclosures [Line Items] |  |  |  |
Requested Annual Revenue Requirement | 5.0 |  |  |
FERC 2021 PJM and SPP Transmission Formula Rate Challenge [Member] |  |  |  |
Public Utilities, General Disclosures [Line Items] |  |  |  |
Stand Alone Treatment of NOLCs Annual Revenue Increase | $ 52.0 | $ 61.0 | $ 69.0 | $ 78.0

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