Label	Element	Value
Carrying Costs Income	aep_CarryingCostsIncome	$ 9,000
Carrying Costs Income	aep_CarryingCostsIncome	9,000
Public Utilities, Allowance for Funds Used During Construction, Capitalized Cost of Equity	us-gaap_PublicUtilitiesAllowanceForFundsUsedDuringConstructionCapitalizedCostOfEquity	25,000
Public Utilities, Allowance for Funds Used During Construction, Capitalized Cost of Equity	us-gaap_PublicUtilitiesAllowanceForFundsUsedDuringConstructionCapitalizedCostOfEquity	34,000
Appalachian Power Co [Member]
Carrying Costs Income	aep_CarryingCostsIncome	263
Carrying Costs Income	aep_CarryingCostsIncome	417
Public Utilities, Allowance for Funds Used During Construction, Capitalized Cost of Equity	us-gaap_PublicUtilitiesAllowanceForFundsUsedDuringConstructionCapitalizedCostOfEquity	1,625
Public Utilities, Allowance for Funds Used During Construction, Capitalized Cost of Equity	us-gaap_PublicUtilitiesAllowanceForFundsUsedDuringConstructionCapitalizedCostOfEquity	3,897
Indiana Michigan Power Co [Member]
Public Utilities, Allowance for Funds Used During Construction, Capitalized Cost of Equity	us-gaap_PublicUtilitiesAllowanceForFundsUsedDuringConstructionCapitalizedCostOfEquity	2,907
Public Utilities, Allowance for Funds Used During Construction, Capitalized Cost of Equity	us-gaap_PublicUtilitiesAllowanceForFundsUsedDuringConstructionCapitalizedCostOfEquity	4,804
Ohio Power Co [Member]
Carrying Costs Income	aep_CarryingCostsIncome	5,153
Carrying Costs Income	aep_CarryingCostsIncome	6,874
Amortization Of Generation Deferrals	aep_AmortizationOfGenerationDeferrals	24,977
Amortization Of Generation Deferrals	aep_AmortizationOfGenerationDeferrals	35,301
Public Utilities, Allowance for Funds Used During Construction, Capitalized Cost of Equity	us-gaap_PublicUtilitiesAllowanceForFundsUsedDuringConstructionCapitalizedCostOfEquity	1,342
Public Utilities, Allowance for Funds Used During Construction, Capitalized Cost of Equity	us-gaap_PublicUtilitiesAllowanceForFundsUsedDuringConstructionCapitalizedCostOfEquity	2,343
Public Service Co Of Oklahoma [Member]
Public Utilities, Allowance for Funds Used During Construction, Capitalized Cost of Equity	us-gaap_PublicUtilitiesAllowanceForFundsUsedDuringConstructionCapitalizedCostOfEquity	2,283
Public Utilities, Allowance for Funds Used During Construction, Capitalized Cost of Equity	us-gaap_PublicUtilitiesAllowanceForFundsUsedDuringConstructionCapitalizedCostOfEquity	590
Southwestern Electric Power Co [Member]
Public Utilities, Allowance for Funds Used During Construction, Capitalized Cost of Equity	us-gaap_PublicUtilitiesAllowanceForFundsUsedDuringConstructionCapitalizedCostOfEquity	2,197
Public Utilities, Allowance for Funds Used During Construction, Capitalized Cost of Equity	us-gaap_PublicUtilitiesAllowanceForFundsUsedDuringConstructionCapitalizedCostOfEquity	$ 5,882