Rate Matters FERC (Details) - USD ($) $ in Millions	9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2021
FERC PJM 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 RTO Incentive Complaint [Member]
Public Utilities, General Disclosures [Line Items]
Estimated Pretax Income Reduction	20.0
Independence Energy Connection Project [Member]
Public Utilities, General Disclosures [Line Items]
AEP Share of Independence Energy Connection Capital Costs	$ 92.0
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%