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  <element name="TotalSubsidiaryBillingsToRegistrantSubsidiaries" id="aep_TotalSubsidiaryBillingsToRegistrantSubsidiaries" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" abstract="false" nillable="true" xbrli:balance="credit" xbrli:periodType="duration" />
  <element name="TotalBillingsFromSubsidiaryAbstract" id="aep_TotalBillingsFromSubsidiaryAbstract" type="xbrli:stringItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration" />
  <element name="UnauditedQuarterlyFinancialInformationTextualsAbstract" id="aep_UnauditedQuarterlyFinancialInformationTextualsAbstract" type="xbrli:stringItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration" />
  <element name="SwepcoRecordedLossFromAepepInSalesToAepAffiliates" id="aep_SwepcoRecordedLossFromAepepInSalesToAepAffiliates" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" abstract="false" nillable="true" xbrli:balance="debit" xbrli:periodType="duration" />
  <element name="AmountOfTransferredRefurbishedTurbinesAndRelatedEquipment" id="aep_AmountOfTransferredRefurbishedTurbinesAndRelatedEquipment" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" abstract="false" nillable="true" xbrli:balance="credit" xbrli:periodType="duration" />
  <element name="CapacityOfGasPlant" id="aep_CapacityOfGasPlant" type="xbrli:stringItemType" substitutionGroup="xbrli:item" abstract="false" nillable="true" xbrli:periodType="duration" />
  <element name="TermOfUnitPowerAgreementBetweenSubsidiaries" id="aep_TermOfUnitPowerAgreementBetweenSubsidiaries" type="xbrli:integerItemType" substitutionGroup="xbrli:item" abstract="false" nillable="true" xbrli:periodType="duration" />
  <element name="OptionForAdditionalPeriodOfAgreement" id="aep_OptionForAdditionalPeriodOfAgreement" type="xbrli:integerItemType" substitutionGroup="xbrli:item" abstract="false" nillable="true" xbrli:periodType="duration" />
  <element name="LegalEntityOneAxis" id="aep_LegalEntityOneAxis" type="xbrli:stringItemType" substitutionGroup="xbrldt:dimensionItem" abstract="true" nillable="true" xbrli:periodType="duration" />
  <element name="EntityOneDomain" id="aep_EntityOneDomain" type="nonnum:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration" />
  <element name="LegalEntityTwoAxis" id="aep_LegalEntityTwoAxis" type="xbrli:stringItemType" substitutionGroup="xbrldt:dimensionItem" abstract="true" nillable="true" xbrli:periodType="duration" />
  <element name="EntityTwoDomain" id="aep_EntityTwoDomain" type="nonnum:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration" />
  <element name="LegalEntityThreeAxis" id="aep_LegalEntityThreeAxis" type="xbrli:stringItemType" substitutionGroup="xbrldt:dimensionItem" abstract="true" nillable="true" xbrli:periodType="duration" />
  <element name="EntityThreeDomain" id="aep_EntityThreeDomain" type="nonnum:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration" />
  <element name="AepscMember" id="aep_AepscMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration" />
  <element name="PowerAgreementBetweenSubsidiariesInPercent" id="aep_PowerAgreementBetweenSubsidiariesInPercent" type="num:percentItemType" substitutionGroup="xbrli:item" abstract="false" nillable="true" xbrli:periodType="duration" />
  <element name="RevenuesRecordedAsOtherRevenuesInIncomeStatement" id="aep_RevenuesRecordedAsOtherRevenuesInIncomeStatement" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" abstract="false" nillable="true" xbrli:balance="credit" xbrli:periodType="duration" />
  <element name="RailcarMaintenanceServicesMember" id="aep_RailcarMaintenanceServicesMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration" />
  <element name="CoalTransloadingServicesMember" id="aep_CoalTransloadingServicesMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration" />
  <element name="UreaTransloadingAndOtherServicesMember" id="aep_UreaTransloadingAndOtherServicesMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration" />
  <element name="IkecMember" id="aep_IkecMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration" />
  <element name="CarryingAmountAndClassificationOfVariableInterestInSubsidiaryAccountsPayableAbstract" id="aep_CarryingAmountAndClassificationOfVariableInterestInSubsidiaryAccountsPayableAbstract" type="xbrli:stringItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration" />
  <element name="AegcosMember" id="aep_AegcosMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration" />
  <element name="BilledCompanyTccMember" id="aep_BilledCompanyTccMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration" />
  <element name="BilledCompanyWpcoMember" id="aep_BilledCompanyWpcoMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration" />
  <element name="WheelingPowerCoMember" id="aep_WheelingPowerCoMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration" />
  <element name="BilledCompanyKgpcoMember" id="aep_BilledCompanyKgpcoMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration" />
  <element name="BilledCompanyTncMember" id="aep_BilledCompanyTncMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration" />
  <element name="TermOfPurchasePowerAgreementBetweenSubsidiaries" id="aep_TermOfPurchasePowerAgreementBetweenSubsidiaries" type="xbrli:integerItemType" substitutionGroup="xbrli:item" abstract="false" nillable="true" xbrli:periodType="duration" />
  <element name="UnitContingentPowerUnderPurchasePowerAgreement" id="aep_UnitContingentPowerUnderPurchasePowerAgreement" type="xbrli:stringItemType" substitutionGroup="xbrli:item" abstract="false" nillable="true" xbrli:periodType="duration" />
  <element name="AepSoldItsInterestInTheSweenyFacilityToConocoPhillips" id="aep_AepSoldItsInterestInTheSweenyFacilityToConocoPhillips" type="num:percentItemType" substitutionGroup="xbrli:item" abstract="false" nillable="true" xbrli:periodType="duration" />
  <element name="VariableInterestFiveMember" id="aep_VariableInterestFiveMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration" />
  <element name="DebtGuaranteedByEntities" id="aep_DebtGuaranteedByEntities" type="num:percentItemType" substitutionGroup="xbrli:item" abstract="false" nillable="true" xbrli:periodType="duration" />
  <element name="TotalBillingsFromEntities" id="aep_TotalBillingsFromEntities" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" abstract="false" nillable="true" xbrli:balance="debit" xbrli:periodType="duration" />
  <element name="ManagementFeeReceived" id="aep_ManagementFeeReceived" type="num:percentItemType" substitutionGroup="xbrli:item" abstract="false" nillable="true" xbrli:periodType="duration" />
  <element name="AdditionalCapitalProvided" id="aep_AdditionalCapitalProvided" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" abstract="false" nillable="true" xbrli:balance="credit" xbrli:periodType="duration" />
  <element name="OutstandingEquityOwnership" id="aep_OutstandingEquityOwnership" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" abstract="false" nillable="true" xbrli:balance="credit" xbrli:periodType="duration" />
  <element name="IncreaseInEquity" id="aep_IncreaseInEquity" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" abstract="false" nillable="true" xbrli:balance="credit" xbrli:periodType="duration" />
  <element name="TotalBillingsUnderLeaseTerm" id="aep_TotalBillingsUnderLeaseTerm" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" abstract="false" nillable="true" xbrli:balance="credit" xbrli:periodType="duration" />
  <element name="PercentageOfPlantLeasesBySubsidiaries" id="aep_PercentageOfPlantLeasesBySubsidiaries" type="num:percentItemType" substitutionGroup="xbrli:item" abstract="false" nillable="true" xbrli:periodType="duration" />
  <element name="PercentageOwnershipOfSubsidiaryInPlant" id="aep_PercentageOwnershipOfSubsidiaryInPlant" type="num:percentItemType" substitutionGroup="xbrli:item" abstract="false" nillable="true" xbrli:periodType="duration" />
  <element name="PercentageOwnershipOfSubsidiaryInPowerGeneratingStation" id="aep_PercentageOwnershipOfSubsidiaryInPowerGeneratingStation" type="num:percentItemType" substitutionGroup="xbrli:item" abstract="false" nillable="true" xbrli:periodType="duration" />
  <element name="RockportPlantUnitOneMember" id="aep_RockportPlantUnitOneMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration" />
  <element name="RockportPlantUnitTwoMember" id="aep_RockportPlantUnitTwoMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration" />
  <element name="LawrenceburgGeneratingStationMember" id="aep_LawrenceburgGeneratingStationMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration" />
  <element name="NetSettlementWithParentEnergyPartnersInc" id="aep_NetSettlementWithParentEnergyPartnersInc" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" abstract="false" nillable="true" xbrli:balance="debit" xbrli:periodType="duration" />
  <element name="RegistrantSubsidiariesRiskManagementLiabilitiesRelatedToAffiliatesAbstract" id="aep_RegistrantSubsidiariesRiskManagementLiabilitiesRelatedToAffiliatesAbstract" type="xbrli:stringItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration" />
  <element name="CoalTransloadingRevenues" id="aep_CoalTransloadingRevenues" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" abstract="false" nillable="true" xbrli:balance="credit" xbrli:periodType="duration" />
  <element name="RailcarMaintenanceRevenues" id="aep_RailcarMaintenanceRevenues" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" abstract="false" nillable="true" xbrli:balance="credit" xbrli:periodType="duration" />
  <element name="AffiliateCoalPurchasesRealizedAndUnrealizedAmountsRecordedAbstract" id="aep_AffiliateCoalPurchasesRealizedAndUnrealizedAmountsRecordedAbstract" type="xbrli:stringItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration" />
  <element name="RealizedAndUnrealizedAmountsRecorded" id="aep_RealizedAndUnrealizedAmountsRecorded" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" abstract="false" nillable="true" xbrli:balance="credit" xbrli:periodType="duration" />
  <element name="VariableInterestEntitiesByBalanceSheetLocationAxis" id="aep_VariableInterestEntitiesByBalanceSheetLocationAxis" type="xbrli:stringItemType" substitutionGroup="xbrldt:dimensionItem" abstract="true" nillable="true" xbrli:periodType="duration" />
  <element name="VariableInterestEntitiesByBalanceSheetLocationDomain" id="aep_VariableInterestEntitiesByBalanceSheetLocationDomain" type="nonnum:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration" />
  <element name="AffiliatedPortionOfRiskManagementLiabilitiesReflectedOnBalanceSheets" id="aep_AffiliatedPortionOfRiskManagementLiabilitiesReflectedOnBalanceSheets" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" abstract="false" nillable="true" xbrli:balance="credit" xbrli:periodType="instant" />
  <element name="TransferOfPropertyFromParentToSubsidiaryThroughCapitalContribution" id="aep_TransferOfPropertyFromParentToSubsidiaryThroughCapitalContribution" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" abstract="false" nillable="true" xbrli:balance="credit" xbrli:periodType="duration" />
  <element name="AgreementToPurchaseAvailableGeneratingCapacityFromThePlantBySubsidiaries" id="aep_AgreementToPurchaseAvailableGeneratingCapacityFromThePlantBySubsidiaries" type="num:percentItemType" substitutionGroup="xbrli:item" abstract="false" nillable="true" xbrli:periodType="duration" />
  <element name="OwnershipInterestInOneGeneratingUnit" id="aep_OwnershipInterestInOneGeneratingUnit" type="num:percentItemType" substitutionGroup="xbrli:item" abstract="false" nillable="true" xbrli:periodType="duration" />
  <element name="PercentageOwnershipInAffiliateOwnedBySubsidiary" id="aep_PercentageOwnershipInAffiliateOwnedBySubsidiary" type="num:percentItemType" substitutionGroup="xbrli:item" abstract="false" nillable="true" xbrli:periodType="duration" />
  <element name="ExpensesRecordedAsOtherOperationExpenses" id="aep_ExpensesRecordedAsOtherOperationExpenses" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" abstract="false" nillable="true" xbrli:balance="debit" xbrli:periodType="duration" />
  <element name="PercentageOwnedInNonUtilitySubsidiaryByParentCompany" id="aep_PercentageOwnedInNonUtilitySubsidiaryByParentCompany" type="num:percentItemType" substitutionGroup="xbrli:item" abstract="false" nillable="true" xbrli:periodType="duration" />
  <element name="SaleOfLignite" id="aep_SaleOfLignite" type="num:percentItemType" substitutionGroup="xbrli:item" abstract="false" nillable="true" xbrli:periodType="duration" />
  <element name="ValueOfNaturalGasContractWithAffiliates" id="aep_ValueOfNaturalGasContractWithAffiliates" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" abstract="false" nillable="true" xbrli:balance="debit" xbrli:periodType="instant" />
  <element name="AmountAboveWhichSalesAndPurchasesOfElectricPropertyDisclosedSeparately" id="aep_AmountAboveWhichSalesAndPurchasesOfElectricPropertyDisclosedSeparately" type="xbrli:stringItemType" substitutionGroup="xbrli:item" abstract="false" nillable="true" xbrli:periodType="duration" />
  <element name="SubsidiariesAggregateAffiliatedSalesAndPurchasesOfMetersAndTransformersAbstract" id="aep_SubsidiariesAggregateAffiliatedSalesAndPurchasesOfMetersAndTransformersAbstract" type="xbrli:stringItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration" />
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  <element name="TermOfAssignmentOfPurchasePowerAgreementToAssociateBySpecoTccAndTnc" id="aep_TermOfAssignmentOfPurchasePowerAgreementToAssociateBySpecoTccAndTnc" type="xbrli:integerItemType" substitutionGroup="xbrli:item" abstract="false" nillable="true" xbrli:periodType="instant" />
  <element name="RateMattersDetailsAbstract" id="aep_RateMattersDetailsAbstract" type="xbrli:stringItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration" />
  <element name="RateMattersTextualsAbstract" id="aep_RateMattersTextualsAbstract" type="xbrli:stringItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration" />
  <element name="RecognizedGrossSeamsEliminationCostAllocationRevenue" id="aep_RecognizedGrossSeamsEliminationCostAllocationRevenue" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" abstract="false" nillable="true" xbrli:periodType="duration" />
  <element name="ContractualConstructionObligationsOfJointOwnersAndSubsidiary" id="aep_ContractualConstructionObligationsOfJointOwnersAndSubsidiary" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" abstract="false" nillable="true" xbrli:periodType="duration" />
  <element name="SubsidiaryShareOfContractualConstructionObligations" id="aep_SubsidiaryShareOfContractualConstructionObligations" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" abstract="false" nillable="true" xbrli:periodType="duration" />
  <element name="RequiredCapOnPlant" id="aep_RequiredCapOnPlant" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" abstract="false" nillable="true" xbrli:periodType="duration" />
  <element name="RequestedBaseRateIncrease" id="aep_RequestedBaseRateIncrease" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" abstract="false" nillable="true" xbrli:periodType="duration" />
  <element name="RequestedReturnOnEquity" id="aep_RequestedReturnOnEquity" type="num:percentItemType" substitutionGroup="xbrli:item" abstract="false" nillable="true" xbrli:periodType="duration" />
  <element name="RequiredCapOnCarbonDioxideEmissionCosts" id="aep_RequiredCapOnCarbonDioxideEmissionCosts" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" abstract="false" nillable="true" xbrli:periodType="duration" />
  <element name="RefundOfOtherNetTrueUpRegulatoryLiabilities" id="aep_RefundOfOtherNetTrueUpRegulatoryLiabilities" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" abstract="false" nillable="true" xbrli:balance="credit" xbrli:periodType="duration" />
  <element name="TaxBenefitsAndAssociatedCarryingCostsRelatedToSubsidiaryGenerationAssets" id="aep_TaxBenefitsAndAssociatedCarryingCostsRelatedToSubsidiaryGenerationAssets" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" abstract="false" nillable="true" xbrli:periodType="duration" />
  <element name="RefundOfExcessEarningsIncludingInterest" id="aep_RefundOfExcessEarningsIncludingInterest" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" abstract="false" nillable="true" xbrli:periodType="duration" />
  <element name="ColumbusSouthernPowerCoMember" id="aep_ColumbusSouthernPowerCoMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration" />
  <element name="OhioPowerCoMember" id="aep_OhioPowerCoMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration" />
  <element name="SouthwesternElectricPowerCoMember" id="aep_SouthwesternElectricPowerCoMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration" />
  <element name="ElectricTransmissionTexasLlcMember" id="aep_ElectricTransmissionTexasLlcMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration" />
  <element name="AppalachianPowerCoMember" id="aep_AppalachianPowerCoMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration" />
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  <element name="DerivativesAndHedgingTextualsAbstract" id="aep_DerivativesAndHedgingTextualsAbstract" type="xbrli:stringItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration" />
  <element name="AepTexasCentralCoMember" id="aep_AepTexasCentralCoMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration" />
  <element name="AepTexasNorthCoMember" id="aep_AepTexasNorthCoMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration" />
  <element name="NotionalVolumeOfDerivativeInstrumentsAbstract" id="aep_NotionalVolumeOfDerivativeInstrumentsAbstract" type="xbrli:stringItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration" />
  <element name="VolumeOfPowerDerivativesContract" id="aep_VolumeOfPowerDerivativesContract" type="xbrli:integerItemType" substitutionGroup="xbrli:item" abstract="false" nillable="true" xbrli:periodType="instant" />
  <element name="VolumeOfCoalDerivativesContract" id="aep_VolumeOfCoalDerivativesContract" type="xbrli:integerItemType" substitutionGroup="xbrli:item" abstract="false" nillable="true" xbrli:periodType="instant" />
  <element name="VolumeOfNaturalGasDerivativesContract" id="aep_VolumeOfNaturalGasDerivativesContract" type="xbrli:integerItemType" substitutionGroup="xbrli:item" abstract="false" nillable="true" xbrli:periodType="instant" />
  <element name="VolumeOfHeatingOilAndGasolineDerivativesContract" id="aep_VolumeOfHeatingOilAndGasolineDerivativesContract" type="xbrli:integerItemType" substitutionGroup="xbrli:item" abstract="false" nillable="true" xbrli:periodType="instant" />
  <element name="NotionalAmountOfInterestRateAndForeignCurrencyDerivativesContract" id="aep_NotionalAmountOfInterestRateAndForeignCurrencyDerivativesContract" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" abstract="false" nillable="true" xbrli:balance="debit" xbrli:periodType="instant" />
  <element name="InterestRateAndForeignCurrencyMember" id="aep_InterestRateAndForeignCurrencyMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration" />
  <element name="RiskManagementCommodityContractsMember" id="aep_RiskManagementCommodityContractsMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration" />
  <element name="AmountOfGainOrLossReclassifiedFromAccumulatedOtherComprehensiveIncomeToIncomeStatementWithinBalanceSheetAbstract" id="aep_AmountOfGainOrLossReclassifiedFromAccumulatedOtherComprehensiveIncomeToIncomeStatementWithinBalanceSheetAbstract" type="xbrli:stringItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration" />
  <element name="MaximumLimitOfBorrowedDebts" id="aep_MaximumLimitOfBorrowedDebts" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" abstract="false" nillable="true" xbrli:balance="credit" xbrli:periodType="duration" />
  <element name="FairValueOfDerivativeLiabilitiesSubjectToCrossDefaultProvisions" id="aep_FairValueOfDerivativeLiabilitiesSubjectToCrossDefaultProvisions" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" abstract="false" nillable="true" xbrli:balance="debit" xbrli:periodType="instant" />
  <element name="AmountAttributableToRtoAndIsoActivities" id="aep_AmountAttributableToRtoAndIsoActivities" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" abstract="false" nillable="true" xbrli:balance="debit" xbrli:periodType="instant" />
  <element name="FairValueMeasurementsTextualsAbstract" id="aep_FairValueMeasurementsTextualsAbstract" type="xbrli:stringItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration" />
  <element name="OtherThanTemporaryImpairmentsOfOtherTemporaryInvestmentsNetOfTax" id="aep_OtherThanTemporaryImpairmentsOfOtherTemporaryInvestmentsNetOfTax" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" abstract="false" nillable="true" xbrli:balance="debit" xbrli:periodType="duration" />
  <element name="AdjustedCostOfDebtSecurities" id="aep_AdjustedCostOfDebtSecurities" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" abstract="false" nillable="true" xbrli:balance="debit" xbrli:periodType="instant" />
  <element name="BusinessSegmentsDetailsAbstract" id="aep_BusinessSegmentsDetailsAbstract" type="xbrli:stringItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration" />
  <element name="BusinessSegmentsTextualsAbstract" id="aep_BusinessSegmentsTextualsAbstract" type="xbrli:stringItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration" />
  <element name="AnnualTransportationOfCoalAndDryBulkCommodities" id="aep_AnnualTransportationOfCoalAndDryBulkCommodities" type="xbrli:integerItemType" substitutionGroup="xbrli:item" abstract="false" nillable="true" xbrli:periodType="duration" />
  <element name="TransportationOfAgriculturalProducts" id="aep_TransportationOfAgriculturalProducts" type="num:percentItemType" substitutionGroup="xbrli:item" abstract="false" nillable="true" xbrli:periodType="duration" />
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  <element name="WestVirginiaMember" id="aep_WestVirginiaMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration" />
  <element name="FederalNetIncomeTaxOperatingLoss" id="aep_FederalNetIncomeTaxOperatingLoss" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" abstract="false" nillable="true" xbrli:balance="debit" xbrli:periodType="duration" />
</schema>
