Rate Matters East Companies (Details) - USD ($) $ in Millions	1 Months Ended	3 Months Ended
	Apr. 30, 2023	Mar. 31, 2023	Dec. 31, 2022
Public Utilities, General Disclosures [Line Items]
Net Property, Plant and Equipment		$ 73,347.0	$ 73,339.1
AEP Transmission Co [Member]
Public Utilities, General Disclosures [Line Items]
Net Property, Plant and Equipment		13,712.0	13,339.9
Appalachian Power Co [Member]
Public Utilities, General Disclosures [Line Items]
Net Property, Plant and Equipment		12,506.1	12,379.2
Indiana Michigan Power Co [Member]
Public Utilities, General Disclosures [Line Items]
Net Property, Plant and Equipment		7,416.9	7,411.5
Ohio Power Co [Member]
Public Utilities, General Disclosures [Line Items]
Net Property, Plant and Equipment		8,807.3	$ 8,609.3
ENEC Filing | Appalachian Power Co [Member]
Public Utilities, General Disclosures [Line Items]
2021 Requested Increase in ENEC Revenues		73.0
2021 Cumulative ENEC Under Recovery		55.0
2021 Projected ENEC Cost Incease		18.0
2021 Approved ENEC Rate Increase		7.0
2021 Approved Reduction in ENEC Projected Costs		48.0
2022 Requested Increase in ENEC Rates		155.0
Current Cumulative ENEC Under Recovery		539.0
2022 Requested Increase in ENEC Rates Second Filing		297.0
2022 Approved Projected ENEC Rate Increase		31.0
2022 Approved Overall ENEC Rate Increase		93.0
2022 Recommended ENEC Under-Recovery Disallowance		83.0
2022 Recommended Increase in ENEC Rates		$ 13.0
ENEC Filing | Appalachian Power Co [Member] | Subsequent Event [Member]
Public Utilities, General Disclosures [Line Items]
2023 Alt One Annual Increase in ENEC	$ 293.0
2023 Alt One Current Year ENEC Increase	89.0
2023 Alt One Under Recovery	200.0
2023 Alt Two Annual Increase in ENEC Rates	89.0
2023 Alt Two Asset Securitization	1,900.0
2023 Alt Two Under Recovery	553.0
2023 Alt Two Major Storm Expense Deferrals	88.0
2023 Alt Two WV Amos and Mountaineer Book Value and CCR and ELG Investments	$ 1,200.0
Opinion Coal Fired Plants Capacity Factor	69.00%
Opinion Recommended Disallowance Factor	52.90%
September 2022 Cumulative ENEC Under Recovery Balance	$ 430.0
Potential Cumulative ENEC Under Recovery Disallowance	285.0
Michigan Power Supply Cost Recovery Reconciliation | Indiana Michigan Power Co [Member] | Subsequent Event [Member]
Public Utilities, General Disclosures [Line Items]
Recommended Disallowance	$ 18.0
2020-2022 Virginia Triennial Review [Member] | Appalachian Power Co [Member]
Public Utilities, General Disclosures [Line Items]
Requested Return on Equity		10.60%
Previously Incurred Costs Deferral Below Authorized ROE Band		$ 38.0
Requested Annual Base Rate Increase		213.0
Requested Annual Base Rate Increase Vegetation Management Portion		47.0
Requested annual Base Rate Incresae Depreciation Expense Portion		$ 35.0
Ohio ESP Filings [Member] | Ohio Power Co [Member]
Public Utilities, General Disclosures [Line Items]
Proprosed ESP Return on Common Equity		10.65%