 | jppfs_cor:NetDefinedBenefitLiability | parent-child | http://disclosure.edinet-fsa.go.jp/role/jppfs/rol_std_ConsolidatedBalanceSheet |
 | jppfs_cor:BondsPayable | parent-child | http://disclosure.edinet-fsa.go.jp/role/jppfs/rol_std_ConsolidatedBalanceSheet |
 | jppfs_cor:LongTermLoansPayable | parent-child | http://disclosure.edinet-fsa.go.jp/role/jppfs/rol_std_ConsolidatedBalanceSheet |
 | jppfs_cor:LongTermAccruedLiabilitiesNCLELE | parent-child | http://disclosure.edinet-fsa.go.jp/role/jppfs/rol_std_ConsolidatedBalanceSheet |
 | jppfs_cor:ContributionPayableForReprocessingOfSpentNuclearFuelNCLELE | parent-child | http://disclosure.edinet-fsa.go.jp/role/jppfs/rol_std_ConsolidatedBalanceSheet |
 | jppfs_cor:LeaseObligationsNCL | parent-child | http://disclosure.edinet-fsa.go.jp/role/jppfs/rol_std_ConsolidatedBalanceSheet |
 | jppfs_cor:ProvisionForDecommissioningOfNuclearPowerUnitsNCLELE | parent-child | http://disclosure.edinet-fsa.go.jp/role/jppfs/rol_std_ConsolidatedBalanceSheet |
 | jppfs_cor:AssetRetirementObligationsNCL | parent-child | http://disclosure.edinet-fsa.go.jp/role/jppfs/rol_std_ConsolidatedBalanceSheet |
 | jppfs_cor:DeferredTaxLiabilities | parent-child | http://disclosure.edinet-fsa.go.jp/role/jppfs/rol_std_ConsolidatedBalanceSheet |
 | jppfs_cor:NegativeGoodwill | parent-child | http://disclosure.edinet-fsa.go.jp/role/jppfs/rol_std_ConsolidatedBalanceSheet |
 | jppfs_cor:OtherNoncurrentLiabilitiesNCLELE | parent-child | http://disclosure.edinet-fsa.go.jp/role/jppfs/rol_std_ConsolidatedBalanceSheet |
 | jppfs_cor:BondsPayable | parent-child | http://disclosure.edinet-fsa.go.jp/role/jppfs/rol_std_BalanceSheet |
 | jppfs_cor:LongTermLoansPayable | parent-child | http://disclosure.edinet-fsa.go.jp/role/jppfs/rol_std_BalanceSheet |
 | jppfs_cor:LongTermAccruedLiabilitiesNCLELE | parent-child | http://disclosure.edinet-fsa.go.jp/role/jppfs/rol_std_BalanceSheet |
 | jppfs_cor:ContributionPayableForReprocessingOfSpentNuclearFuelNCLELE | parent-child | http://disclosure.edinet-fsa.go.jp/role/jppfs/rol_std_BalanceSheet |
 | jppfs_cor:LeaseObligationsNCL | parent-child | http://disclosure.edinet-fsa.go.jp/role/jppfs/rol_std_BalanceSheet |
 | jppfs_cor:LongTermDebtToSubsidiariesAndAffiliatesNCLELE | parent-child | http://disclosure.edinet-fsa.go.jp/role/jppfs/rol_std_BalanceSheet |
 | jppfs_cor:ProvisionForRetirementBenefits | parent-child | http://disclosure.edinet-fsa.go.jp/role/jppfs/rol_std_BalanceSheet |
 | jppfs_cor:ProvisionForDecommissioningOfNuclearPowerUnitsNCLELE | parent-child | http://disclosure.edinet-fsa.go.jp/role/jppfs/rol_std_BalanceSheet |
 | jppfs_cor:AssetRetirementObligationsNCL | parent-child | http://disclosure.edinet-fsa.go.jp/role/jppfs/rol_std_BalanceSheet |
 | jppfs_cor:DeferredTaxLiabilities | parent-child | http://disclosure.edinet-fsa.go.jp/role/jppfs/rol_std_BalanceSheet |
 | jppfs_cor:NegativeGoodwill | parent-child | http://disclosure.edinet-fsa.go.jp/role/jppfs/rol_std_BalanceSheet |
 | jppfs_cor:OtherNoncurrentLiabilitiesNCLELE | parent-child | http://disclosure.edinet-fsa.go.jp/role/jppfs/rol_std_BalanceSheet |
 | jppfs_cor:NetDefinedBenefitLiability | summation-item | http://disclosure.edinet-fsa.go.jp/role/jppfs/rol_std_ConsolidatedBalanceSheet |
 | jppfs_cor:BondsPayable | summation-item | http://disclosure.edinet-fsa.go.jp/role/jppfs/rol_std_ConsolidatedBalanceSheet |
 | jppfs_cor:LongTermLoansPayable | summation-item | http://disclosure.edinet-fsa.go.jp/role/jppfs/rol_std_ConsolidatedBalanceSheet |
 | jppfs_cor:LongTermAccruedLiabilitiesNCLELE | summation-item | http://disclosure.edinet-fsa.go.jp/role/jppfs/rol_std_ConsolidatedBalanceSheet |
 | jppfs_cor:ContributionPayableForReprocessingOfSpentNuclearFuelNCLELE | summation-item | http://disclosure.edinet-fsa.go.jp/role/jppfs/rol_std_ConsolidatedBalanceSheet |
 | jppfs_cor:LeaseObligationsNCL | summation-item | http://disclosure.edinet-fsa.go.jp/role/jppfs/rol_std_ConsolidatedBalanceSheet |
 | jppfs_cor:ProvisionForDecommissioningOfNuclearPowerUnitsNCLELE | summation-item | http://disclosure.edinet-fsa.go.jp/role/jppfs/rol_std_ConsolidatedBalanceSheet |
 | jppfs_cor:AssetRetirementObligationsNCL | summation-item | http://disclosure.edinet-fsa.go.jp/role/jppfs/rol_std_ConsolidatedBalanceSheet |
 | jppfs_cor:DeferredTaxLiabilities | summation-item | http://disclosure.edinet-fsa.go.jp/role/jppfs/rol_std_ConsolidatedBalanceSheet |
 | jppfs_cor:NegativeGoodwill | summation-item | http://disclosure.edinet-fsa.go.jp/role/jppfs/rol_std_ConsolidatedBalanceSheet |
 | jppfs_cor:OtherNoncurrentLiabilitiesNCLELE | summation-item | http://disclosure.edinet-fsa.go.jp/role/jppfs/rol_std_ConsolidatedBalanceSheet |
 | jppfs_cor:BondsPayable | summation-item | http://disclosure.edinet-fsa.go.jp/role/jppfs/rol_std_BalanceSheet |
 | jppfs_cor:LongTermLoansPayable | summation-item | http://disclosure.edinet-fsa.go.jp/role/jppfs/rol_std_BalanceSheet |
 | jppfs_cor:LongTermAccruedLiabilitiesNCLELE | summation-item | http://disclosure.edinet-fsa.go.jp/role/jppfs/rol_std_BalanceSheet |
 | jppfs_cor:ContributionPayableForReprocessingOfSpentNuclearFuelNCLELE | summation-item | http://disclosure.edinet-fsa.go.jp/role/jppfs/rol_std_BalanceSheet |
 | jppfs_cor:LeaseObligationsNCL | summation-item | http://disclosure.edinet-fsa.go.jp/role/jppfs/rol_std_BalanceSheet |
 | jppfs_cor:LongTermDebtToSubsidiariesAndAffiliatesNCLELE | summation-item | http://disclosure.edinet-fsa.go.jp/role/jppfs/rol_std_BalanceSheet |
 | jppfs_cor:ProvisionForRetirementBenefits | summation-item | http://disclosure.edinet-fsa.go.jp/role/jppfs/rol_std_BalanceSheet |
 | jppfs_cor:ProvisionForDecommissioningOfNuclearPowerUnitsNCLELE | summation-item | http://disclosure.edinet-fsa.go.jp/role/jppfs/rol_std_BalanceSheet |
 | jppfs_cor:AssetRetirementObligationsNCL | summation-item | http://disclosure.edinet-fsa.go.jp/role/jppfs/rol_std_BalanceSheet |
 | jppfs_cor:DeferredTaxLiabilities | summation-item | http://disclosure.edinet-fsa.go.jp/role/jppfs/rol_std_BalanceSheet |
 | jppfs_cor:NegativeGoodwill | summation-item | http://disclosure.edinet-fsa.go.jp/role/jppfs/rol_std_BalanceSheet |
 | jppfs_cor:OtherNoncurrentLiabilitiesNCLELE | summation-item | http://disclosure.edinet-fsa.go.jp/role/jppfs/rol_std_BalanceSheet |
 | jppfs_cor:NetDefinedBenefitLiability | domain-member | http://disclosure.edinet-fsa.go.jp/role/jppfs/rol_std_ConsolidatedBalanceSheet |
 | jppfs_cor:BondsPayable | domain-member | http://disclosure.edinet-fsa.go.jp/role/jppfs/rol_std_ConsolidatedBalanceSheet |
 | jppfs_cor:LongTermLoansPayable | domain-member | http://disclosure.edinet-fsa.go.jp/role/jppfs/rol_std_ConsolidatedBalanceSheet |
 | jppfs_cor:LongTermAccruedLiabilitiesNCLELE | domain-member | http://disclosure.edinet-fsa.go.jp/role/jppfs/rol_std_ConsolidatedBalanceSheet |
 | jppfs_cor:ContributionPayableForReprocessingOfSpentNuclearFuelNCLELE | domain-member | http://disclosure.edinet-fsa.go.jp/role/jppfs/rol_std_ConsolidatedBalanceSheet |
 | jppfs_cor:LeaseObligationsNCL | domain-member | http://disclosure.edinet-fsa.go.jp/role/jppfs/rol_std_ConsolidatedBalanceSheet |
 | jppfs_cor:ProvisionForDecommissioningOfNuclearPowerUnitsNCLELE | domain-member | http://disclosure.edinet-fsa.go.jp/role/jppfs/rol_std_ConsolidatedBalanceSheet |
 | jppfs_cor:AssetRetirementObligationsNCL | domain-member | http://disclosure.edinet-fsa.go.jp/role/jppfs/rol_std_ConsolidatedBalanceSheet |
 | jppfs_cor:DeferredTaxLiabilities | domain-member | http://disclosure.edinet-fsa.go.jp/role/jppfs/rol_std_ConsolidatedBalanceSheet |
 | jppfs_cor:NegativeGoodwill | domain-member | http://disclosure.edinet-fsa.go.jp/role/jppfs/rol_std_ConsolidatedBalanceSheet |
 | jppfs_cor:OtherNoncurrentLiabilitiesNCLELE | domain-member | http://disclosure.edinet-fsa.go.jp/role/jppfs/rol_std_ConsolidatedBalanceSheet |
 | jppfs_cor:BondsPayable | domain-member | http://disclosure.edinet-fsa.go.jp/role/jppfs/rol_std_BalanceSheet |
 | jppfs_cor:LongTermLoansPayable | domain-member | http://disclosure.edinet-fsa.go.jp/role/jppfs/rol_std_BalanceSheet |
 | jppfs_cor:LongTermAccruedLiabilitiesNCLELE | domain-member | http://disclosure.edinet-fsa.go.jp/role/jppfs/rol_std_BalanceSheet |
 | jppfs_cor:ContributionPayableForReprocessingOfSpentNuclearFuelNCLELE | domain-member | http://disclosure.edinet-fsa.go.jp/role/jppfs/rol_std_BalanceSheet |
 | jppfs_cor:LeaseObligationsNCL | domain-member | http://disclosure.edinet-fsa.go.jp/role/jppfs/rol_std_BalanceSheet |
 | jppfs_cor:LongTermDebtToSubsidiariesAndAffiliatesNCLELE | domain-member | http://disclosure.edinet-fsa.go.jp/role/jppfs/rol_std_BalanceSheet |
 | jppfs_cor:ProvisionForRetirementBenefits | domain-member | http://disclosure.edinet-fsa.go.jp/role/jppfs/rol_std_BalanceSheet |
 | jppfs_cor:ProvisionForDecommissioningOfNuclearPowerUnitsNCLELE | domain-member | http://disclosure.edinet-fsa.go.jp/role/jppfs/rol_std_BalanceSheet |
 | jppfs_cor:AssetRetirementObligationsNCL | domain-member | http://disclosure.edinet-fsa.go.jp/role/jppfs/rol_std_BalanceSheet |
 | jppfs_cor:DeferredTaxLiabilities | domain-member | http://disclosure.edinet-fsa.go.jp/role/jppfs/rol_std_BalanceSheet |
 | jppfs_cor:NegativeGoodwill | domain-member | http://disclosure.edinet-fsa.go.jp/role/jppfs/rol_std_BalanceSheet |
 | jppfs_cor:OtherNoncurrentLiabilitiesNCLELE | domain-member | http://disclosure.edinet-fsa.go.jp/role/jppfs/rol_std_BalanceSheet |
 | jppfs_cor:BondsPayable | general-special | http://disclosure.edinet-fsa.go.jp/role/jppfs/rol_ele_BalanceSheet-ListOfAccounts |
 | jppfs_cor:LongTermLoansPayable | general-special | http://disclosure.edinet-fsa.go.jp/role/jppfs/rol_ele_BalanceSheet-ListOfAccounts |
 | jppfs_cor:LongTermAccruedLiabilitiesNCLELE | general-special | http://disclosure.edinet-fsa.go.jp/role/jppfs/rol_ele_BalanceSheet-ListOfAccounts |
 | jppfs_cor:ContributionPayableForReprocessingOfSpentNuclearFuelNCLELE | general-special | http://disclosure.edinet-fsa.go.jp/role/jppfs/rol_ele_BalanceSheet-ListOfAccounts |
 | jppfs_cor:LeaseObligationsNCL | general-special | http://disclosure.edinet-fsa.go.jp/role/jppfs/rol_ele_BalanceSheet-ListOfAccounts |
 | jppfs_cor:LongTermDebtToSubsidiariesAndAffiliatesNCLELE | general-special | http://disclosure.edinet-fsa.go.jp/role/jppfs/rol_ele_BalanceSheet-ListOfAccounts |
 | jppfs_cor:ProvisionForRetirementBenefits | general-special | http://disclosure.edinet-fsa.go.jp/role/jppfs/rol_ele_BalanceSheet-ListOfAccounts |
 | jppfs_cor:ProvisionForReprocessingOfIrradiatedNuclearFuelNCLELE | general-special | http://disclosure.edinet-fsa.go.jp/role/jppfs/rol_ele_BalanceSheet-ListOfAccounts |
 | jppfs_cor:ProvisionForPreparationOfTheReprocessingOfIrradiatedNuclearFuelNCLELE | general-special | http://disclosure.edinet-fsa.go.jp/role/jppfs/rol_ele_BalanceSheet-ListOfAccounts |
 | jppfs_cor:ProvisionForDecommissioningOfNuclearPowerUnitsNCLELE | general-special | http://disclosure.edinet-fsa.go.jp/role/jppfs/rol_ele_BalanceSheet-ListOfAccounts |
 | jppfs_cor:AssetRetirementObligationsNCL | general-special | http://disclosure.edinet-fsa.go.jp/role/jppfs/rol_ele_BalanceSheet-ListOfAccounts |
 | jppfs_cor:DeferredTaxLiabilities | general-special | http://disclosure.edinet-fsa.go.jp/role/jppfs/rol_ele_BalanceSheet-ListOfAccounts |
 | jppfs_cor:NegativeGoodwill | general-special | http://disclosure.edinet-fsa.go.jp/role/jppfs/rol_ele_BalanceSheet-ListOfAccounts |
 | jppfs_cor:OtherNoncurrentLiabilitiesNCLELE | general-special | http://disclosure.edinet-fsa.go.jp/role/jppfs/rol_ele_BalanceSheet-ListOfAccounts |