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entNuclearFuelandDecommissioningTrustsMember2023-01-012023-09-300000004904aep:IndianaMichiganPowerCoMemberaep:DomesticMemberaep:SpentNuclearFuelandDecommissioningTrustsMember2023-01-012023-09-300000004904aep:IndianaMichiganPowerCoMemberaep:DomesticMember2022-12-310000004904aep:DomesticMember2022-12-310000004904aep:IndianaMichiganPowerCoMemberaep:DomesticMemberaep:SpentNuclearFuelandDecommissioningTrustsMember2022-12-310000004904aep:DomesticMemberaep:SpentNuclearFuelandDecommissioningTrustsMember2022-12-310000004904aep:DomesticMemberaep:SpentNuclearFuelandDecommissioningTrustsMember2022-01-012022-12-310000004904aep:IndianaMichiganPowerCoMemberaep:DomesticMemberaep:SpentNuclearFuelandDecommissioningTrustsMember2022-01-012022-12-310000004904aep:IndianaMichiganPowerCoMemberaep:SpentNuclearFuelandDecommissioningTrustsMember2023-09-300000004904aep:SpentNuclearFuelandDecommissioningTrustsMember2023-09-300000004904aep:SpentNuclearFuelandDecommissioningTrustsMember2023-01-012023-09-300000004904aep:IndianaMichiganPowerCoMemberaep:SpentNuclearFuelandDecommissioningTrustsMember2023-01-012023-09-300000004904aep:SpentNuclearFuelandDecommissioningTrustsMember2022-12-310000004904aep:IndianaMichiganPowerCoMemberaep:SpentNuclearFuelandDecommissioningTrustsMember2022-12-310000004904aep:IndianaMichiganPowerCoMemberaep:SpentNuclearFuelandDecommissioningTrustsMember2022-01-012022-12-310000004904aep:SpentNuclearFuelandDecommissioningTrustsMember2022-01-012022-12-310000004904aep:IndianaMichiganPowerCoMemberaep:SpentNuclearFuelandDecommissioningTrustsMember2023-07-012023-09-300000004904aep:SpentNuclearFuelandDecommissioningTrustsMember2023-07-012023-09-300000004904aep:SpentNuclearFuelandDecommissioningTrustsMember2022-07-012022-09-300000004904aep:IndianaMichiganPowerCoMemberaep:SpentNuclearFuelandDecommissioningTrustsMember2022-07-012022-09-300000004904aep:SpentNuclearFuelandDecommissioningTrustsMember2022-01-012022-09-300000004904aep:IndianaMichiganPowerCoMemberaep:SpentNuclearFuelandDecommissioningTrustsMember2022-01-012022-09-300000004904us-gaap:CashMemberus-gaap:FairValueInputsLevel1Member2023-09-300000004904us-gaap:FairValueInputsLevel2Memberus-gaap:CashMember2023-09-300000004904us-gaap:FairValueInputsLevel3Memberus-gaap:CashMember2023-09-300000004904us-gaap:PortionAtOtherThanFairValueFairValueDisclosureMemberus-gaap:CashMember2023-09-300000004904aep:OtherCashDepositsMemberus-gaap:FairValueInputsLevel1Member2023-09-300000004904us-gaap:FairValueInputsLevel2Memberaep:OtherCashDepositsMember2023-09-300000004904us-gaap:FairValueInputsLevel3Memberaep:OtherCashDepositsMember2023-09-300000004904us-gaap:PortionAtOtherThanFairValueFairValueDisclosureMemberaep:OtherCashDepositsMember2023-09-300000004904aep:MutualFundsFixedIncomeMemberus-gaap:FairValueInputsLevel1Member2023-09-300000004904us-gaap:FairValueInputsLevel2Memberaep:MutualFundsFixedIncomeMember2023-09-300000004904us-gaap:FairValueInputsLevel3Memberaep:MutualFundsFixedIncomeMember2023-09-300000004904us-gaap:PortionAtOtherThanFairValueFairValueDisclosureMemberaep:MutualFundsFixedIncomeMember2023-09-300000004904us-gaap:MutualFundMemberus-gaap:FairValueInputsLevel1Member2023-09-300000004904us-gaap:FairValueInputsLevel2Memberus-gaap:MutualFundMember2023-09-300000004904us-gaap:FairValueInputsLevel3Memberus-gaap:MutualFundMember2023-09-300000004904us-gaap:PortionAtOtherThanFairValueFairValueDisclosureMemberus-gaap:MutualFundMember2023-09-300000004904us-gaap:FairValueInputsLevel1Member2023-09-300000004904us-gaap:FairValueInputsLevel2Member2023-09-300000004904us-gaap:FairValueInputsLevel3Member2023-09-300000004904us-gaap:PortionAtOtherThanFairValueFairValueDisclosureMember2023-09-300000004904aep:RiskManagementCommodityContractsMemberus-gaap:FairValueInputsLevel1Member2023-09-300000004904aep:RiskManagementCommodityContractsMemberus-gaap:FairValueInputsLevel2Member2023-09-300000004904aep:RiskManagementCommodityContractsMemberus-gaap:FairValueInputsLevel3Member2023-09-300000004904aep:RiskManagementCommodityContractsMemberus-gaap:PortionAtOtherThanFairValueFairValueDisclosureMember2023-09-300000004904aep:RiskManagementCommodityContractsMember2023-09-300000004904us-gaap:CommodityMemberus-gaap:FairValueInputsLevel1Member2023-09-300000004904us-gaap:FairValueInputsLevel2Memberus-gaap:CommodityMember2023-09-300000004904us-gaap:FairValueInputsLevel3Memberus-gaap:CommodityMember2023-09-300000004904us-gaap:PortionAtOtherThanFairValueFairValueDisclosureMemberus-gaap:CommodityMember2023-09-300000004904us-gaap:CommodityMember2023-09-300000004904us-gaap:CashAndCashEquivalentsMemberus-gaap:FairValueInputsLevel1Member2023-09-300000004904us-gaap:CashAndCashEquivalentsMemberus-gaap:FairValueInputsLevel2Member2023-09-300000004904us-gaap:FairValueInputsLevel3Memberus-gaap:CashAndCashEquivalentsMember2023-09-300000004904us-gaap:PortionAtOtherThanFairValueFairValueDisclosureMemberus-gaap:CashAndCashEquivalentsMember2023-09-300000004904us-gaap:USGovernmentAgenciesDebtSecuritiesMemberus-gaap:FairValueInputsLeve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