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