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