 | jppfs_cor:HydroelectricPowerProductionExpensesELE | parent-child | http://disclosure.edinet-fsa.go.jp/role/jppfs/rol_std_ConsolidatedStatementOfIncome |
 | jppfs_cor:ThermalPowerProductionExpensesOEElectricELE | parent-child | http://disclosure.edinet-fsa.go.jp/role/jppfs/rol_std_ConsolidatedStatementOfIncome |
 | jppfs_cor:NuclearPowerProductionExpensesELE | parent-child | http://disclosure.edinet-fsa.go.jp/role/jppfs/rol_std_ConsolidatedStatementOfIncome |
 | jppfs_cor:InternalCombustionEnginePowerProductionExpensesOEElectricELE | parent-child | http://disclosure.edinet-fsa.go.jp/role/jppfs/rol_std_ConsolidatedStatementOfIncome |
 | jppfs_cor:RenewablePowerProductionExpensesOEElectricELE | parent-child | http://disclosure.edinet-fsa.go.jp/role/jppfs/rol_std_ConsolidatedStatementOfIncome |
 | jppfs_cor:PurchasedPowerFromOtherUtilitiesOEElectricELE | parent-child | http://disclosure.edinet-fsa.go.jp/role/jppfs/rol_std_ConsolidatedStatementOfIncome |
 | jppfs_cor:PurchasedPowerFromOtherSuppliersOEElectricELE | parent-child | http://disclosure.edinet-fsa.go.jp/role/jppfs/rol_std_ConsolidatedStatementOfIncome |
 | jppfs_cor:TransmissionExpensesOEElectricELE | parent-child | http://disclosure.edinet-fsa.go.jp/role/jppfs/rol_std_ConsolidatedStatementOfIncome |
 | jppfs_cor:TransformationExpensesOEElectricELE | parent-child | http://disclosure.edinet-fsa.go.jp/role/jppfs/rol_std_ConsolidatedStatementOfIncome |
 | jppfs_cor:DistributionExpensesOEElectricELE | parent-child | http://disclosure.edinet-fsa.go.jp/role/jppfs/rol_std_ConsolidatedStatementOfIncome |
 | jppfs_cor:SellingExpensesOEElectricELE | parent-child | http://disclosure.edinet-fsa.go.jp/role/jppfs/rol_std_ConsolidatedStatementOfIncome |
 | jppfs_cor:InactiveFacilitiesExpensesOEElectricELE | parent-child | http://disclosure.edinet-fsa.go.jp/role/jppfs/rol_std_ConsolidatedStatementOfIncome |
 | jppfs_cor:CostOfLoanedFacilitiesOEElectricELE | parent-child | http://disclosure.edinet-fsa.go.jp/role/jppfs/rol_std_ConsolidatedStatementOfIncome |
 | jppfs_cor:GeneralAndAdministrativeExpensesOEElectricELE | parent-child | http://disclosure.edinet-fsa.go.jp/role/jppfs/rol_std_ConsolidatedStatementOfIncome |
 | jppfs_cor:ExpensesForThirdPartysPowerTransmissionServiceOEElectricELE | parent-child | http://disclosure.edinet-fsa.go.jp/role/jppfs/rol_std_ConsolidatedStatementOfIncome |
 | jppfs_cor:AmortizationOfSuspenseAccountRelatedToNuclearPowerDecommissioningOEElectricELE | parent-child | http://disclosure.edinet-fsa.go.jp/role/jppfs/rol_std_ConsolidatedStatementOfIncome |
 | jppfs_cor:LevyUnderActOnPurchaseOfRenewableEnergySourcedElectricityOEElectricELE | parent-child | http://disclosure.edinet-fsa.go.jp/role/jppfs/rol_std_ConsolidatedStatementOfIncome |
 | jppfs_cor:ExpensesIncurredByContractsToBearBackEndCostsRelatedToPastYearsPowerGenerationOEElectricELE | parent-child | http://disclosure.edinet-fsa.go.jp/role/jppfs/rol_std_ConsolidatedStatementOfIncome |
 | jppfs_cor:ElectricPowerDevelopmentPromotionTaxOEElectricELE | parent-child | http://disclosure.edinet-fsa.go.jp/role/jppfs/rol_std_ConsolidatedStatementOfIncome |
 | jppfs_cor:EnterpriseTaxOEElectricELE | parent-child | http://disclosure.edinet-fsa.go.jp/role/jppfs/rol_std_ConsolidatedStatementOfIncome |
 | jppfs_cor:DevelopmentExpensesOEELE | parent-child | http://disclosure.edinet-fsa.go.jp/role/jppfs/rol_std_ConsolidatedStatementOfIncome |
 | jppfs_cor:AmortizationOfDevelopmentExpensesOEELE | parent-child | http://disclosure.edinet-fsa.go.jp/role/jppfs/rol_std_ConsolidatedStatementOfIncome |
 | jppfs_cor:TransferredCostOfElectricityForConstructionAndIncidentalBusinessOEElectricELE | parent-child | http://disclosure.edinet-fsa.go.jp/role/jppfs/rol_std_ConsolidatedStatementOfIncome |
 | jppfs_cor:HydroelectricPowerProductionExpensesELE | parent-child | http://disclosure.edinet-fsa.go.jp/role/jppfs/rol_std_StatementOfIncome |
 | jppfs_cor:ThermalPowerProductionExpensesOEElectricELE | parent-child | http://disclosure.edinet-fsa.go.jp/role/jppfs/rol_std_StatementOfIncome |
 | jppfs_cor:NuclearPowerProductionExpensesELE | parent-child | http://disclosure.edinet-fsa.go.jp/role/jppfs/rol_std_StatementOfIncome |
 | jppfs_cor:InternalCombustionEnginePowerProductionExpensesOEElectricELE | parent-child | http://disclosure.edinet-fsa.go.jp/role/jppfs/rol_std_StatementOfIncome |
 | jppfs_cor:RenewablePowerProductionExpensesOEElectricELE | parent-child | http://disclosure.edinet-fsa.go.jp/role/jppfs/rol_std_StatementOfIncome |
 | jppfs_cor:PurchasedPowerFromOtherUtilitiesOEElectricELE | parent-child | http://disclosure.edinet-fsa.go.jp/role/jppfs/rol_std_StatementOfIncome |
 | jppfs_cor:PurchasedPowerFromOtherSuppliersOEElectricELE | parent-child | http://disclosure.edinet-fsa.go.jp/role/jppfs/rol_std_StatementOfIncome |
 | jppfs_cor:TransmissionExpensesOEElectricELE | parent-child | http://disclosure.edinet-fsa.go.jp/role/jppfs/rol_std_StatementOfIncome |
 | jppfs_cor:TransformationExpensesOEElectricELE | parent-child | http://disclosure.edinet-fsa.go.jp/role/jppfs/rol_std_StatementOfIncome |
 | jppfs_cor:DistributionExpensesOEElectricELE | parent-child | http://disclosure.edinet-fsa.go.jp/role/jppfs/rol_std_StatementOfIncome |
 | jppfs_cor:SellingExpensesOEElectricELE | parent-child | http://disclosure.edinet-fsa.go.jp/role/jppfs/rol_std_StatementOfIncome |
 | jppfs_cor:InactiveFacilitiesExpensesOEElectricELE | parent-child | http://disclosure.edinet-fsa.go.jp/role/jppfs/rol_std_StatementOfIncome |
 | jppfs_cor:CostOfLoanedFacilitiesOEElectricELE | parent-child | http://disclosure.edinet-fsa.go.jp/role/jppfs/rol_std_StatementOfIncome |
 | jppfs_cor:GeneralAndAdministrativeExpensesOEElectricELE | parent-child | http://disclosure.edinet-fsa.go.jp/role/jppfs/rol_std_StatementOfIncome |
 | jppfs_cor:ExpensesForThirdPartysPowerTransmissionServiceOEElectricELE | parent-child | http://disclosure.edinet-fsa.go.jp/role/jppfs/rol_std_StatementOfIncome |
 | jppfs_cor:AmortizationOfSuspenseAccountRelatedToNuclearPowerDecommissioningOEElectricELE | parent-child | http://disclosure.edinet-fsa.go.jp/role/jppfs/rol_std_StatementOfIncome |
 | jppfs_cor:LevyUnderActOnPurchaseOfRenewableEnergySourcedElectricityOEElectricELE | parent-child | http://disclosure.edinet-fsa.go.jp/role/jppfs/rol_std_StatementOfIncome |
 | jppfs_cor:ExpensesIncurredByContractsToBearBackEndCostsRelatedToPastYearsPowerGenerationOEElectricELE | parent-child | http://disclosure.edinet-fsa.go.jp/role/jppfs/rol_std_StatementOfIncome |
 | jppfs_cor:ElectricPowerDevelopmentPromotionTaxOEElectricELE | parent-child | http://disclosure.edinet-fsa.go.jp/role/jppfs/rol_std_StatementOfIncome |
 | jppfs_cor:EnterpriseTaxOEElectricELE | parent-child | http://disclosure.edinet-fsa.go.jp/role/jppfs/rol_std_StatementOfIncome |
 | jppfs_cor:DevelopmentExpensesOEELE | parent-child | http://disclosure.edinet-fsa.go.jp/role/jppfs/rol_std_StatementOfIncome |
 | jppfs_cor:AmortizationOfDevelopmentExpensesOEELE | parent-child | http://disclosure.edinet-fsa.go.jp/role/jppfs/rol_std_StatementOfIncome |
 | jppfs_cor:TransferredCostOfElectricityForConstructionAndIncidentalBusinessOEElectricELE | parent-child | http://disclosure.edinet-fsa.go.jp/role/jppfs/rol_std_StatementOfIncome |
 | jppfs_cor:HydroelectricPowerProductionExpensesELE | summation-item | http://disclosure.edinet-fsa.go.jp/role/jppfs/rol_std_ConsolidatedStatementOfIncome |
 | jppfs_cor:ThermalPowerProductionExpensesOEElectricELE | summation-item | http://disclosure.edinet-fsa.go.jp/role/jppfs/rol_std_ConsolidatedStatementOfIncome |
 | jppfs_cor:NuclearPowerProductionExpensesELE | summation-item | http://disclosure.edinet-fsa.go.jp/role/jppfs/rol_std_ConsolidatedStatementOfIncome |
 | jppfs_cor:InternalCombustionEnginePowerProductionExpensesOEElectricELE | summation-item | http://disclosure.edinet-fsa.go.jp/role/jppfs/rol_std_ConsolidatedStatementOfIncome |
 | jppfs_cor:RenewablePowerProductionExpensesOEElectricELE | summation-item | http://disclosure.edinet-fsa.go.jp/role/jppfs/rol_std_ConsolidatedStatementOfIncome |
 | jppfs_cor:PurchasedPowerFromOtherUtilitiesOEElectricELE | summation-item | http://disclosure.edinet-fsa.go.jp/role/jppfs/rol_std_ConsolidatedStatementOfIncome |
 | jppfs_cor:PurchasedPowerFromOtherSuppliersOEElectricELE | summation-item | http://disclosure.edinet-fsa.go.jp/role/jppfs/rol_std_ConsolidatedStatementOfIncome |
 | jppfs_cor:TransmissionExpensesOEElectricELE | summation-item | http://disclosure.edinet-fsa.go.jp/role/jppfs/rol_std_ConsolidatedStatementOfIncome |
 | jppfs_cor:TransformationExpensesOEElectricELE | summation-item | http://disclosure.edinet-fsa.go.jp/role/jppfs/rol_std_ConsolidatedStatementOfIncome |
 | jppfs_cor:DistributionExpensesOEElectricELE | summation-item | http://disclosure.edinet-fsa.go.jp/role/jppfs/rol_std_ConsolidatedStatementOfIncome |
 | jppfs_cor:SellingExpensesOEElectricELE | summation-item | http://disclosure.edinet-fsa.go.jp/role/jppfs/rol_std_ConsolidatedStatementOfIncome |
 | jppfs_cor:InactiveFacilitiesExpensesOEElectricELE | summation-item | http://disclosure.edinet-fsa.go.jp/role/jppfs/rol_std_ConsolidatedStatementOfIncome |
 | jppfs_cor:CostOfLoanedFacilitiesOEElectricELE | summation-item | http://disclosure.edinet-fsa.go.jp/role/jppfs/rol_std_ConsolidatedStatementOfIncome |
 | jppfs_cor:GeneralAndAdministrativeExpensesOEElectricELE | summation-item | http://disclosure.edinet-fsa.go.jp/role/jppfs/rol_std_ConsolidatedStatementOfIncome |
 | jppfs_cor:ExpensesForThirdPartysPowerTransmissionServiceOEElectricELE | summation-item | http://disclosure.edinet-fsa.go.jp/role/jppfs/rol_std_ConsolidatedStatementOfIncome |
 | jppfs_cor:AmortizationOfSuspenseAccountRelatedToNuclearPowerDecommissioningOEElectricELE | summation-item | http://disclosure.edinet-fsa.go.jp/role/jppfs/rol_std_ConsolidatedStatementOfIncome |
 | jppfs_cor:LevyUnderActOnPurchaseOfRenewableEnergySourcedElectricityOEElectricELE | summation-item | http://disclosure.edinet-fsa.go.jp/role/jppfs/rol_std_ConsolidatedStatementOfIncome |
 | jppfs_cor:ExpensesIncurredByContractsToBearBackEndCostsRelatedToPastYearsPowerGenerationOEElectricELE | summation-item | http://disclosure.edinet-fsa.go.jp/role/jppfs/rol_std_ConsolidatedStatementOfIncome |
 | jppfs_cor:ElectricPowerDevelopmentPromotionTaxOEElectricELE | summation-item | http://disclosure.edinet-fsa.go.jp/role/jppfs/rol_std_ConsolidatedStatementOfIncome |
 | jppfs_cor:EnterpriseTaxOEElectricELE | summation-item | http://disclosure.edinet-fsa.go.jp/role/jppfs/rol_std_ConsolidatedStatementOfIncome |
 | jppfs_cor:DevelopmentExpensesOEELE | summation-item | http://disclosure.edinet-fsa.go.jp/role/jppfs/rol_std_ConsolidatedStatementOfIncome |
 | jppfs_cor:AmortizationOfDevelopmentExpensesOEELE | summation-item | http://disclosure.edinet-fsa.go.jp/role/jppfs/rol_std_ConsolidatedStatementOfIncome |
 | jppfs_cor:TransferredCostOfElectricityForConstructionAndIncidentalBusinessOEElectricELE | summation-item | http://disclosure.edinet-fsa.go.jp/role/jppfs/rol_std_ConsolidatedStatementOfIncome |
 | jppfs_cor:HydroelectricPowerProductionExpensesELE | summation-item | http://disclosure.edinet-fsa.go.jp/role/jppfs/rol_std_StatementOfIncome |
 | jppfs_cor:ThermalPowerProductionExpensesOEElectricELE | summation-item | http://disclosure.edinet-fsa.go.jp/role/jppfs/rol_std_StatementOfIncome |
 | jppfs_cor:NuclearPowerProductionExpensesELE | summation-item | http://disclosure.edinet-fsa.go.jp/role/jppfs/rol_std_StatementOfIncome |
 | jppfs_cor:InternalCombustionEnginePowerProductionExpensesOEElectricELE | summation-item | http://disclosure.edinet-fsa.go.jp/role/jppfs/rol_std_StatementOfIncome |
 | jppfs_cor:RenewablePowerProductionExpensesOEElectricELE | summation-item | http://disclosure.edinet-fsa.go.jp/role/jppfs/rol_std_StatementOfIncome |
 | jppfs_cor:PurchasedPowerFromOtherUtilitiesOEElectricELE | summation-item | http://disclosure.edinet-fsa.go.jp/role/jppfs/rol_std_StatementOfIncome |
 | jppfs_cor:PurchasedPowerFromOtherSuppliersOEElectricELE | summation-item | http://disclosure.edinet-fsa.go.jp/role/jppfs/rol_std_StatementOfIncome |
 | jppfs_cor:TransmissionExpensesOEElectricELE | summation-item | http://disclosure.edinet-fsa.go.jp/role/jppfs/rol_std_StatementOfIncome |
 | jppfs_cor:TransformationExpensesOEElectricELE | summation-item | http://disclosure.edinet-fsa.go.jp/role/jppfs/rol_std_StatementOfIncome |
 | jppfs_cor:DistributionExpensesOEElectricELE | summation-item | http://disclosure.edinet-fsa.go.jp/role/jppfs/rol_std_StatementOfIncome |
 | jppfs_cor:SellingExpensesOEElectricELE | summation-item | http://disclosure.edinet-fsa.go.jp/role/jppfs/rol_std_StatementOfIncome |
 | jppfs_cor:InactiveFacilitiesExpensesOEElectricELE | summation-item | http://disclosure.edinet-fsa.go.jp/role/jppfs/rol_std_StatementOfIncome |
 | jppfs_cor:CostOfLoanedFacilitiesOEElectricELE | summation-item | http://disclosure.edinet-fsa.go.jp/role/jppfs/rol_std_StatementOfIncome |
 | jppfs_cor:GeneralAndAdministrativeExpensesOEElectricELE | summation-item | http://disclosure.edinet-fsa.go.jp/role/jppfs/rol_std_StatementOfIncome |
 | jppfs_cor:ExpensesForThirdPartysPowerTransmissionServiceOEElectricELE | summation-item | http://disclosure.edinet-fsa.go.jp/role/jppfs/rol_std_StatementOfIncome |
 | jppfs_cor:AmortizationOfSuspenseAccountRelatedToNuclearPowerDecommissioningOEElectricELE | summation-item | http://disclosure.edinet-fsa.go.jp/role/jppfs/rol_std_StatementOfIncome |
 | jppfs_cor:LevyUnderActOnPurchaseOfRenewableEnergySourcedElectricityOEElectricELE | summation-item | http://disclosure.edinet-fsa.go.jp/role/jppfs/rol_std_StatementOfIncome |
 | jppfs_cor:ExpensesIncurredByContractsToBearBackEndCostsRelatedToPastYearsPowerGenerationOEElectricELE | summation-item | http://disclosure.edinet-fsa.go.jp/role/jppfs/rol_std_StatementOfIncome |
 | jppfs_cor:ElectricPowerDevelopmentPromotionTaxOEElectricELE | summation-item | http://disclosure.edinet-fsa.go.jp/role/jppfs/rol_std_StatementOfIncome |
 | jppfs_cor:EnterpriseTaxOEElectricELE | summation-item | http://disclosure.edinet-fsa.go.jp/role/jppfs/rol_std_StatementOfIncome |
 | jppfs_cor:DevelopmentExpensesOEELE | summation-item | http://disclosure.edinet-fsa.go.jp/role/jppfs/rol_std_StatementOfIncome |
 | jppfs_cor:AmortizationOfDevelopmentExpensesOEELE | summation-item | http://disclosure.edinet-fsa.go.jp/role/jppfs/rol_std_StatementOfIncome |
 | jppfs_cor:TransferredCostOfElectricityForConstructionAndIncidentalBusinessOEElectricELE | summation-item | http://disclosure.edinet-fsa.go.jp/role/jppfs/rol_std_StatementOfIncome |
 | jppfs_cor:HydroelectricPowerProductionExpensesELE | domain-member | http://disclosure.edinet-fsa.go.jp/role/jppfs/rol_std_ConsolidatedStatementOfIncome |
 | jppfs_cor:ThermalPowerProductionExpensesOEElectricELE | domain-member | http://disclosure.edinet-fsa.go.jp/role/jppfs/rol_std_ConsolidatedStatementOfIncome |
 | jppfs_cor:NuclearPowerProductionExpensesELE | domain-member | http://disclosure.edinet-fsa.go.jp/role/jppfs/rol_std_ConsolidatedStatementOfIncome |
 | jppfs_cor:InternalCombustionEnginePowerProductionExpensesOEElectricELE | domain-member | http://disclosure.edinet-fsa.go.jp/role/jppfs/rol_std_ConsolidatedStatementOfIncome |
 | jppfs_cor:RenewablePowerProductionExpensesOEElectricELE | domain-member | http://disclosure.edinet-fsa.go.jp/role/jppfs/rol_std_ConsolidatedStatementOfIncome |
 | jppfs_cor:PurchasedPowerFromOtherUtilitiesOEElectricELE | domain-member | http://disclosure.edinet-fsa.go.jp/role/jppfs/rol_std_ConsolidatedStatementOfIncome |
 | jppfs_cor:PurchasedPowerFromOtherSuppliersOEElectricELE | domain-member | http://disclosure.edinet-fsa.go.jp/role/jppfs/rol_std_ConsolidatedStatementOfIncome |
 | jppfs_cor:TransmissionExpensesOEElectricELE | domain-member | http://disclosure.edinet-fsa.go.jp/role/jppfs/rol_std_ConsolidatedStatementOfIncome |
 | jppfs_cor:TransformationExpensesOEElectricELE | domain-member | http://disclosure.edinet-fsa.go.jp/role/jppfs/rol_std_ConsolidatedStatementOfIncome |
 | jppfs_cor:DistributionExpensesOEElectricELE | domain-member | http://disclosure.edinet-fsa.go.jp/role/jppfs/rol_std_ConsolidatedStatementOfIncome |
 | jppfs_cor:SellingExpensesOEElectricELE | domain-member | http://disclosure.edinet-fsa.go.jp/role/jppfs/rol_std_ConsolidatedStatementOfIncome |
 | jppfs_cor:InactiveFacilitiesExpensesOEElectricELE | domain-member | http://disclosure.edinet-fsa.go.jp/role/jppfs/rol_std_ConsolidatedStatementOfIncome |
 | jppfs_cor:CostOfLoanedFacilitiesOEElectricELE | domain-member | http://disclosure.edinet-fsa.go.jp/role/jppfs/rol_std_ConsolidatedStatementOfIncome |
 | jppfs_cor:GeneralAndAdministrativeExpensesOEElectricELE | domain-member | http://disclosure.edinet-fsa.go.jp/role/jppfs/rol_std_ConsolidatedStatementOfIncome |
 | jppfs_cor:ExpensesForThirdPartysPowerTransmissionServiceOEElectricELE | domain-member | http://disclosure.edinet-fsa.go.jp/role/jppfs/rol_std_ConsolidatedStatementOfIncome |
 | jppfs_cor:AmortizationOfSuspenseAccountRelatedToNuclearPowerDecommissioningOEElectricELE | domain-member | http://disclosure.edinet-fsa.go.jp/role/jppfs/rol_std_ConsolidatedStatementOfIncome |
 | jppfs_cor:LevyUnderActOnPurchaseOfRenewableEnergySourcedElectricityOEElectricELE | domain-member | http://disclosure.edinet-fsa.go.jp/role/jppfs/rol_std_ConsolidatedStatementOfIncome |
 | jppfs_cor:ExpensesIncurredByContractsToBearBackEndCostsRelatedToPastYearsPowerGenerationOEElectricELE | domain-member | http://disclosure.edinet-fsa.go.jp/role/jppfs/rol_std_ConsolidatedStatementOfIncome |
 | jppfs_cor:ElectricPowerDevelopmentPromotionTaxOEElectricELE | domain-member | http://disclosure.edinet-fsa.go.jp/role/jppfs/rol_std_ConsolidatedStatementOfIncome |
 | jppfs_cor:EnterpriseTaxOEElectricELE | domain-member | http://disclosure.edinet-fsa.go.jp/role/jppfs/rol_std_ConsolidatedStatementOfIncome |
 | jppfs_cor:DevelopmentExpensesOEELE | domain-member | http://disclosure.edinet-fsa.go.jp/role/jppfs/rol_std_ConsolidatedStatementOfIncome |
 | jppfs_cor:AmortizationOfDevelopmentExpensesOEELE | domain-member | http://disclosure.edinet-fsa.go.jp/role/jppfs/rol_std_ConsolidatedStatementOfIncome |
 | jppfs_cor:TransferredCostOfElectricityForConstructionAndIncidentalBusinessOEElectricELE | domain-member | http://disclosure.edinet-fsa.go.jp/role/jppfs/rol_std_ConsolidatedStatementOfIncome |
 | jppfs_cor:HydroelectricPowerProductionExpensesELE | domain-member | http://disclosure.edinet-fsa.go.jp/role/jppfs/rol_std_StatementOfIncome |
 | jppfs_cor:ThermalPowerProductionExpensesOEElectricELE | domain-member | http://disclosure.edinet-fsa.go.jp/role/jppfs/rol_std_StatementOfIncome |
 | jppfs_cor:NuclearPowerProductionExpensesELE | domain-member | http://disclosure.edinet-fsa.go.jp/role/jppfs/rol_std_StatementOfIncome |
 | jppfs_cor:InternalCombustionEnginePowerProductionExpensesOEElectricELE | domain-member | http://disclosure.edinet-fsa.go.jp/role/jppfs/rol_std_StatementOfIncome |
 | jppfs_cor:RenewablePowerProductionExpensesOEElectricELE | domain-member | http://disclosure.edinet-fsa.go.jp/role/jppfs/rol_std_StatementOfIncome |
 | jppfs_cor:PurchasedPowerFromOtherUtilitiesOEElectricELE | domain-member | http://disclosure.edinet-fsa.go.jp/role/jppfs/rol_std_StatementOfIncome |
 | jppfs_cor:PurchasedPowerFromOtherSuppliersOEElectricELE | domain-member | http://disclosure.edinet-fsa.go.jp/role/jppfs/rol_std_StatementOfIncome |
 | jppfs_cor:TransmissionExpensesOEElectricELE | domain-member | http://disclosure.edinet-fsa.go.jp/role/jppfs/rol_std_StatementOfIncome |
 | jppfs_cor:TransformationExpensesOEElectricELE | domain-member | http://disclosure.edinet-fsa.go.jp/role/jppfs/rol_std_StatementOfIncome |
 | jppfs_cor:DistributionExpensesOEElectricELE | domain-member | http://disclosure.edinet-fsa.go.jp/role/jppfs/rol_std_StatementOfIncome |
 | jppfs_cor:SellingExpensesOEElectricELE | domain-member | http://disclosure.edinet-fsa.go.jp/role/jppfs/rol_std_StatementOfIncome |
 | jppfs_cor:InactiveFacilitiesExpensesOEElectricELE | domain-member | http://disclosure.edinet-fsa.go.jp/role/jppfs/rol_std_StatementOfIncome |
 | jppfs_cor:CostOfLoanedFacilitiesOEElectricELE | domain-member | http://disclosure.edinet-fsa.go.jp/role/jppfs/rol_std_StatementOfIncome |
 | jppfs_cor:GeneralAndAdministrativeExpensesOEElectricELE | domain-member | http://disclosure.edinet-fsa.go.jp/role/jppfs/rol_std_StatementOfIncome |
 | jppfs_cor:ExpensesForThirdPartysPowerTransmissionServiceOEElectricELE | domain-member | http://disclosure.edinet-fsa.go.jp/role/jppfs/rol_std_StatementOfIncome |
 | jppfs_cor:AmortizationOfSuspenseAccountRelatedToNuclearPowerDecommissioningOEElectricELE | domain-member | http://disclosure.edinet-fsa.go.jp/role/jppfs/rol_std_StatementOfIncome |
 | jppfs_cor:LevyUnderActOnPurchaseOfRenewableEnergySourcedElectricityOEElectricELE | domain-member | http://disclosure.edinet-fsa.go.jp/role/jppfs/rol_std_StatementOfIncome |
 | jppfs_cor:ExpensesIncurredByContractsToBearBackEndCostsRelatedToPastYearsPowerGenerationOEElectricELE | domain-member | http://disclosure.edinet-fsa.go.jp/role/jppfs/rol_std_StatementOfIncome |
 | jppfs_cor:ElectricPowerDevelopmentPromotionTaxOEElectricELE | domain-member | http://disclosure.edinet-fsa.go.jp/role/jppfs/rol_std_StatementOfIncome |
 | jppfs_cor:EnterpriseTaxOEElectricELE | domain-member | http://disclosure.edinet-fsa.go.jp/role/jppfs/rol_std_StatementOfIncome |
 | jppfs_cor:DevelopmentExpensesOEELE | domain-member | http://disclosure.edinet-fsa.go.jp/role/jppfs/rol_std_StatementOfIncome |
 | jppfs_cor:AmortizationOfDevelopmentExpensesOEELE | domain-member | http://disclosure.edinet-fsa.go.jp/role/jppfs/rol_std_StatementOfIncome |
 | jppfs_cor:TransferredCostOfElectricityForConstructionAndIncidentalBusinessOEElectricELE | domain-member | http://disclosure.edinet-fsa.go.jp/role/jppfs/rol_std_StatementOfIncome |
 | jppfs_cor:HydroelectricPowerProductionExpensesELE | general-special | http://disclosure.edinet-fsa.go.jp/role/jppfs/rol_ele_StatementOfIncome-ListOfAccounts |
 | jppfs_cor:ThermalPowerProductionExpensesOEElectricELE | general-special | http://disclosure.edinet-fsa.go.jp/role/jppfs/rol_ele_StatementOfIncome-ListOfAccounts |
 | jppfs_cor:NuclearPowerProductionExpensesELE | general-special | http://disclosure.edinet-fsa.go.jp/role/jppfs/rol_ele_StatementOfIncome-ListOfAccounts |
 | jppfs_cor:InternalCombustionEnginePowerProductionExpensesOEElectricELE | general-special | http://disclosure.edinet-fsa.go.jp/role/jppfs/rol_ele_StatementOfIncome-ListOfAccounts |
 | jppfs_cor:RenewablePowerProductionExpensesOEElectricELE | general-special | http://disclosure.edinet-fsa.go.jp/role/jppfs/rol_ele_StatementOfIncome-ListOfAccounts |
 | jppfs_cor:PurchasedPowerFromOtherUtilitiesOEElectricELE | general-special | http://disclosure.edinet-fsa.go.jp/role/jppfs/rol_ele_StatementOfIncome-ListOfAccounts |
 | jppfs_cor:PurchasedPowerFromOtherSuppliersOEElectricELE | general-special | http://disclosure.edinet-fsa.go.jp/role/jppfs/rol_ele_StatementOfIncome-ListOfAccounts |
 | jppfs_cor:TransmissionExpensesOEElectricELE | general-special | http://disclosure.edinet-fsa.go.jp/role/jppfs/rol_ele_StatementOfIncome-ListOfAccounts |
 | jppfs_cor:TransformationExpensesOEElectricELE | general-special | http://disclosure.edinet-fsa.go.jp/role/jppfs/rol_ele_StatementOfIncome-ListOfAccounts |
 | jppfs_cor:DistributionExpensesOEElectricELE | general-special | http://disclosure.edinet-fsa.go.jp/role/jppfs/rol_ele_StatementOfIncome-ListOfAccounts |
 | jppfs_cor:SellingExpensesOEElectricELE | general-special | http://disclosure.edinet-fsa.go.jp/role/jppfs/rol_ele_StatementOfIncome-ListOfAccounts |
 | jppfs_cor:InactiveFacilitiesExpensesOEElectricELE | general-special | http://disclosure.edinet-fsa.go.jp/role/jppfs/rol_ele_StatementOfIncome-ListOfAccounts |
 | jppfs_cor:CostOfLoanedFacilitiesOEElectricELE | general-special | http://disclosure.edinet-fsa.go.jp/role/jppfs/rol_ele_StatementOfIncome-ListOfAccounts |
 | jppfs_cor:GeneralAndAdministrativeExpensesOEElectricELE | general-special | http://disclosure.edinet-fsa.go.jp/role/jppfs/rol_ele_StatementOfIncome-ListOfAccounts |
 | jppfs_cor:ExpensesForThirdPartysPowerTransmissionServiceOEElectricELE | general-special | http://disclosure.edinet-fsa.go.jp/role/jppfs/rol_ele_StatementOfIncome-ListOfAccounts |
 | jppfs_cor:AmortizationOfSuspenseAccountRelatedToNuclearPowerDecommissioningOEElectricELE | general-special | http://disclosure.edinet-fsa.go.jp/role/jppfs/rol_ele_StatementOfIncome-ListOfAccounts |
 | jppfs_cor:LevyUnderActOnPurchaseOfRenewableEnergySourcedElectricityOEElectricELE | general-special | http://disclosure.edinet-fsa.go.jp/role/jppfs/rol_ele_StatementOfIncome-ListOfAccounts |
 | jppfs_cor:ExpensesIncurredByContractsToBearBackEndCostsRelatedToPastYearsPowerGenerationOEElectricELE | general-special | http://disclosure.edinet-fsa.go.jp/role/jppfs/rol_ele_StatementOfIncome-ListOfAccounts |
 | jppfs_cor:ElectricPowerDevelopmentPromotionTaxOEElectricELE | general-special | http://disclosure.edinet-fsa.go.jp/role/jppfs/rol_ele_StatementOfIncome-ListOfAccounts |
 | jppfs_cor:EnterpriseTaxOEElectricELE | general-special | http://disclosure.edinet-fsa.go.jp/role/jppfs/rol_ele_StatementOfIncome-ListOfAccounts |
 | jppfs_cor:DevelopmentExpensesOEELE | general-special | http://disclosure.edinet-fsa.go.jp/role/jppfs/rol_ele_StatementOfIncome-ListOfAccounts |
 | jppfs_cor:AmortizationOfDevelopmentExpensesOEELE | general-special | http://disclosure.edinet-fsa.go.jp/role/jppfs/rol_ele_StatementOfIncome-ListOfAccounts |
 | jppfs_cor:TransferredCostOfElectricityForConstructionAndIncidentalBusinessOEElectricELE | general-special | http://disclosure.edinet-fsa.go.jp/role/jppfs/rol_ele_StatementOfIncome-ListOfAccounts |
 | jppfs_cor:CommunicatingExpensesOEElectricELE | general-special | http://disclosure.edinet-fsa.go.jp/role/jppfs/rol_ele_StatementOfIncome-ListOfAccounts |
 | jppfs_cor:CostOfSalesOEElectricELE | general-special | http://disclosure.edinet-fsa.go.jp/role/jppfs/rol_ele_StatementOfIncome-ListOfAccounts |