FE


Line plots across dimensions of each concept
Tables

Table of contents



us-gaap:CommonStockSharesOutstanding
us-gaap:StatementClassOfStock
us-gaap:StatementEquityComponents

us-gaap:CommonStockSharesAuthorized

us-gaap:WeightedAverageNumberOfDilutedSharesOutstanding

us-gaap:WeightedAverageNumberOfSharesOutstandingBasic

us-gaap:EarningsPerShareBasic

us-gaap:EarningsPerShareDiluted

us-gaap:IncomeLossFromContinuingOperationsPerBasicShare

us-gaap:IncomeLossFromContinuingOperationsPerDilutedShare

us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax
us-gaap:ConsolidationItems
us-gaap:ConsolidationItems, us-gaap:ProductOrService
us-gaap:ConsolidationItems, us-gaap:ProductOrService, us-gaap:StatementBusinessSegments
us-gaap:ConsolidationItems, us-gaap:StatementBusinessSegments
us-gaap:ProductOrService

us-gaap:Revenues
us-gaap:ConsolidationItems
us-gaap:ConsolidationItems, us-gaap:MajorCustomers
us-gaap:ConsolidationItems, us-gaap:MajorCustomers, us-gaap:StatementBusinessSegments
us-gaap:ConsolidationItems, us-gaap:ProductOrService
us-gaap:ConsolidationItems, us-gaap:ProductOrService, us-gaap:StatementBusinessSegments
us-gaap:ConsolidationItems, us-gaap:StatementBusinessSegments
us-gaap:MajorCustomers
us-gaap:MajorCustomers, us-gaap:StatementBusinessSegments
us-gaap:ProductOrService
us-gaap:StatementBusinessSegments

us-gaap:CostsAndExpenses

us-gaap:OperatingIncomeLoss

us-gaap:InterestExpense
us-gaap:ConsolidationItems
us-gaap:ConsolidationItems, us-gaap:StatementBusinessSegments

us-gaap:InterestAndDebtExpense
us-gaap:DerivativeInstrumentRisk, us-gaap:ReclassificationOutOfAccumulatedOtherComprehensiveIncome, us-gaap:StatementEquityComponents

us-gaap:OtherNonoperatingIncomeExpense
us-gaap:ConsolidationItems
us-gaap:ConsolidationItems, us-gaap:StatementBusinessSegments

us-gaap:IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest

us-gaap:IncomeLossFromContinuingOperationsIncludingPortionAttributableToNoncontrollingInterest
us-gaap:ConsolidationItems
us-gaap:ConsolidationItems, us-gaap:StatementBusinessSegments

us-gaap:NonoperatingIncomeExpense

us-gaap:IncomeTaxExpenseBenefit
us-gaap:ConsolidationItems
us-gaap:ConsolidationItems, us-gaap:StatementBusinessSegments
us-gaap:ReclassificationOutOfAccumulatedOtherComprehensiveIncome, us-gaap:StatementEquityComponents

us-gaap:ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest

us-gaap:NetIncomeLoss
us-gaap:ReclassificationOutOfAccumulatedOtherComprehensiveIncome, us-gaap:StatementEquityComponents
us-gaap:StatementEquityComponents

us-gaap:NetIncomeLossAvailableToCommonStockholdersBasic

us-gaap:Assets
us-gaap:ConsolidationItems
us-gaap:ConsolidationItems, us-gaap:StatementBusinessSegments

us-gaap:LiabilitiesAndStockholdersEquity

us-gaap:StockholdersEquity
us-gaap:StatementClassOfStock
us-gaap:StatementEquityComponents

us-gaap:AssetsCurrent

us-gaap:CashAndCashEquivalentsAtCarryingValue
us-gaap:AccountsNotesLoansAndFinancingReceivableByReceivableType
us-gaap:AccountsReceivableNetCurrent
us-gaap:RelatedPartyTransactionsByRelatedParty

us-gaap:InventoryNet

us-gaap:OtherAssetsCurrent

us-gaap:AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment

us-gaap:PropertyPlantAndEquipmentNet

us-gaap:LongTermInvestments

us-gaap:Goodwill
us-gaap:ConsolidationItems, us-gaap:StatementBusinessSegments

us-gaap:OtherAssetsNoncurrent

us-gaap:LiabilitiesCurrent

us-gaap:AccountsPayableCurrent
us-gaap:RelatedPartyTransactionsByRelatedParty

us-gaap:AccruedIncomeTaxesCurrent

us-gaap:OtherLiabilitiesCurrent

us-gaap:LiabilitiesNoncurrent
us-gaap:ConsolidatedEntities, us-gaap:StatementBusinessSegments
us-gaap:LongTermDebt
us-gaap:FairValueByMeasurementBasis

us-gaap:PensionAndOtherPostretirementDefinedBenefitPlansLiabilitiesNoncurrent

us-gaap:OtherLiabilitiesNoncurrent

us-gaap:StockholdersEquity
us-gaap:StatementClassOfStock
us-gaap:StatementEquityComponents

us-gaap:RetainedEarningsAccumulatedDeficit

us-gaap:AccumulatedOtherComprehensiveIncomeLossNetOfTax

us-gaap:NetCashProvidedByUsedInOperatingActivities

us-gaap:NetCashProvidedByUsedInInvestingActivities

us-gaap:NetCashProvidedByUsedInFinancingActivities

us-gaap:NetCashProvidedByUsedInOperatingActivities

us-gaap:NetIncomeLoss
us-gaap:ReclassificationOutOfAccumulatedOtherComprehensiveIncome, us-gaap:StatementEquityComponents
us-gaap:StatementEquityComponents

us-gaap:DepreciationDepletionAndAmortization

us-gaap:NetCashProvidedByUsedInInvestingActivities

us-gaap:NetCashProvidedByUsedInFinancingActivities

us-gaap:ProceedsFromIssuanceOfLongTermDebt
us-gaap:FairValueByMeasurementBasis

us-gaap:RepaymentsOfLongTermDebt
us-gaap:FairValueByMeasurementBasis

us-gaap:RepaymentsOfLongTermDebt
us-gaap:FairValueByMeasurementBasis

us-gaap:EffectiveIncomeTaxRateContinuingOperations

us-gaap:CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents

fe:AmortizationDeferralOfRegulatoryAsset
us-gaap:ConsolidationItems, us-gaap:StatementBusinessSegments

fe:AmountPaidtoSettleAgreementsandTaxSharingPaymentstoSubsidiaryDebtors

fe:DebtandEquitySecuritiesRealizedGainLossSalesProceeds

fe:DebtandEquitySecuritiesRealizedGains

fe:DebtandEquitySecuritiesRealizedLosses
us-gaap:DisposalGroupClassification, us-gaap:IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperations
fe:DeconsolidationSettlementConsiderationandServicesCredit
us-gaap:RetirementPlanType
fe:DefinedBenefitPlanBenefitObligationOneTimeTerminationBenefit
us-gaap:RetirementPlanType
fe:DefinedBenefitPlanNetPeriodicBenefitCostExcludingCapitalizedAmounts

fe:DefinedBenefitPlanPlanAssetsPeriodIncreaseDecreaseIncludingDiscontinuedOperations
us-gaap:DisposalGroupClassification, us-gaap:IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperations
fe:DisposalGroupIncludingDiscontinuedOperationFuelCosts
us-gaap:DisposalGroupClassification, us-gaap:IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperations
fe:DisposalGroupIncludingDiscontinuedOperationGeneralTaxes
us-gaap:DisposalGroupClassification, us-gaap:IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperations
fe:DisposalGroupIncludingDiscontinuedOperationOtherOperatingExpenses

fe:DisposalGroupIncludingDiscontinuedOperationWorthlessStockDeductionNetofTax
us-gaap:IncomeTaxAuthority
us-gaap:Range, us-gaap:DerivativeInstrumentRisk, us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:ValuationTechnique
fe:FairValueInputsEnergy
us-gaap:Range, us-gaap:DerivativeInstrumentRisk, us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:ValuationTechnique
fe:FairValueInputsPowerRegionalPrices
us-gaap:Range, us-gaap:DerivativeInstrumentRisk, us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:ValuationTechnique
fe:FairValueInputsRTOAuctionClearingPrices
us-gaap:DerivativeInstrumentRisk, us-gaap:FairValueByFairValueHierarchyLevel
fe:FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetAndLiabilityPurchases
us-gaap:DerivativeInstrumentRisk, us-gaap:FairValueByFairValueHierarchyLevel
fe:FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetAndLiabilitySettlements
us-gaap:DerivativeInstrumentRisk, us-gaap:FairValueByFairValueHierarchyLevel
fe:FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetunrealizedgainloss
us-gaap:DerivativeInstrumentRisk, us-gaap:FairValueByFairValueHierarchyLevel
fe:FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisLiabilityUnrealizedGainLoss
us-gaap:DerivativeInstrumentRisk, us-gaap:FairValueByFairValueHierarchyLevel
fe:FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisUnrealizedGainLoss
us-gaap:DisposalGroupClassification, us-gaap:IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperations
fe:IncomeTaxExpenseBenefitfromDeconsolidationGainLossIncludingWorthlessStockDeduction
us-gaap:RetirementPlanType
fe:IncreaseDecreasetoNetPeriodicBenefitCostBasedonMarktoMarketAdjustment

fe:InvestmentIncomeFromTrusts

fe:ProposedActionReductioninPowerPlantsCarbonPollutionPercentage
us-gaap:ConsolidationItems
fe:TaxCutsandJobsActChangeinTaxRateRefundofRevenue

us-gaap:AllowanceForDoubtfulAccountsReceivableRecoveries

us-gaap:AllowanceForDoubtfulAccountsReceivableWriteOffs
us-gaap:AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareByAntidilutiveSecurities
us-gaap:AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount

us-gaap:CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect

us-gaap:CommonStockDividendsPerShareDeclared
us-gaap:RelatedPartyTransaction, us-gaap:RelatedPartyTransactionsByRelatedParty, dei:LegalEntity
us-gaap:DebtorReorganizationItemsDischargeOfClaimsAndLiabilities
us-gaap:DisposalGroupClassification, us-gaap:IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperations
us-gaap:DeconsolidationGainOrLossAmount

us-gaap:DeferredIncomeTaxesAndTaxCredits
us-gaap:RetirementPlanType
us-gaap:DefinedBenefitPlanAmortizationOfPriorServiceCostCredit
us-gaap:RetirementPlanType
us-gaap:DefinedBenefitPlanAssumptionsUsedCalculatingNetPeriodicBenefitCostDiscountRate
us-gaap:RetirementPlanType
us-gaap:DefinedBenefitPlanExpectedReturnOnPlanAssets

us-gaap:DefinedBenefitPlanFairValueOfPlanAssetsPeriodIncreaseDecrease
us-gaap:RetirementPlanType
us-gaap:DefinedBenefitPlanInterestCost

us-gaap:DefinedBenefitPlanNetPeriodicBenefitCost
us-gaap:RetirementPlanType
us-gaap:RetirementPlanType
us-gaap:DefinedBenefitPlanServiceCost
us-gaap:RetirementPlanType
us-gaap:DefinedBenefitPlanSpecialTerminationBenefits

us-gaap:Depreciation
us-gaap:ConsolidationItems
us-gaap:ConsolidationItems, us-gaap:StatementBusinessSegments
us-gaap:DisposalGroupClassification, us-gaap:IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperations
us-gaap:DiscontinuedOperationIncomeLossFromDiscontinuedOperationBeforeIncomeTax

us-gaap:DiscontinuedOperationTaxEffectOfDiscontinuedOperation
us-gaap:DisposalGroupClassification, us-gaap:IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperations
us-gaap:DisposalGroupClassification, us-gaap:IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperations
us-gaap:DisposalGroupIncludingDiscontinuedOperationRevenue

us-gaap:DividendsCommonStockCash
us-gaap:StatementEquityComponents

us-gaap:DividendsPreferredStock

us-gaap:ExciseTaxesCollected
us-gaap:DerivativeInstrumentRisk, us-gaap:FairValueByFairValueHierarchyLevel
us-gaap:FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetPurchases
us-gaap:DerivativeInstrumentRisk, us-gaap:FairValueByFairValueHierarchyLevel
us-gaap:FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetSettlements
us-gaap:DerivativeInstrumentRisk, us-gaap:FairValueByFairValueHierarchyLevel
us-gaap:FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisLiabilityPurchases
us-gaap:DerivativeInstrumentRisk, us-gaap:FairValueByFairValueHierarchyLevel
us-gaap:FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisLiabilitySettlements

us-gaap:FuelCosts

us-gaap:IncomeLossFromDiscontinuedOperationsNetOfTax
us-gaap:DisposalGroupClassification, us-gaap:IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperations

us-gaap:IncomeLossFromDiscontinuedOperationsNetOfTaxAttributableToReportingEntity
us-gaap:DisposalGroupClassification, us-gaap:IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperations

us-gaap:IncomeLossFromDiscontinuedOperationsNetOfTaxPerBasicShare

us-gaap:IncomeLossFromDiscontinuedOperationsNetOfTaxPerDilutedShare

us-gaap:IncreaseDecreaseInAccountsAndOtherReceivables

us-gaap:IncreaseDecreaseInAccountsPayableTrade

us-gaap:IncreaseDecreaseInAccruedIncomeTaxesPayable

us-gaap:IncreaseDecreaseInEmployeeRelatedLiabilities

us-gaap:IncreaseDecreaseInInterestPayableNet

us-gaap:IncreaseDecreaseInOtherCurrentLiabilities

us-gaap:IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets

us-gaap:IncrementalCommonSharesAttributableToShareBasedPaymentArrangements

us-gaap:InterestCostsCapitalized

us-gaap:InterestCostsCapitalizedAdjustment
us-gaap:MajorCustomers
us-gaap:LateFeeIncomeGeneratedByServicingFinancialAssetsAmount
us-gaap:StatementScenario, us-gaap:DisposalGroupClassification, us-gaap:IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperations
us-gaap:LitigationSettlementAmountAwardedToOtherParty

us-gaap:NetIncomeLossFromContinuingOperationsAvailableToCommonShareholdersBasic

us-gaap:NetIncomeLossFromDiscontinuedOperationsAvailableToCommonShareholdersBasic

us-gaap:OtherComprehensiveIncomeLossBeforeTax
us-gaap:StatementEquityComponents

us-gaap:OtherComprehensiveIncomeLossCashFlowHedgeGainLossAfterReclassificationBeforeTax

us-gaap:OtherComprehensiveIncomeLossNetOfTax
us-gaap:StatementEquityComponents

us-gaap:OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentBeforeTax

us-gaap:OtherComprehensiveIncomeLossTax
us-gaap:StatementEquityComponents

us-gaap:OtherCostAndExpenseOperating
us-gaap:ReclassificationOutOfAccumulatedOtherComprehensiveIncome, us-gaap:StatementEquityComponents

us-gaap:OtherOperatingActivitiesCashFlowStatement

us-gaap:PaymentsForProceedsFromOtherInvestingActivities

us-gaap:PaymentsForRemovalCosts

us-gaap:PaymentsOfDividendsCommonStock

us-gaap:PaymentsOfDividendsPreferredStockAndPreferenceStock

us-gaap:PaymentsToAcquireAvailableForSaleSecuritiesDebt

us-gaap:PaymentsToAcquireProductiveAssets
us-gaap:ConsolidationItems
us-gaap:ConsolidationItems, us-gaap:StatementBusinessSegments

us-gaap:PensionAndOtherPostretirementBenefitExpense

us-gaap:PensionContributions

us-gaap:ProceedsFromPaymentsForOtherFinancingActivities

us-gaap:ProceedsFromSaleOfAvailableForSaleSecuritiesDebt

us-gaap:ProceedsFromShortTermDebt

us-gaap:ProvisionForDoubtfulAccounts

us-gaap:PublicUtilitiesAllowanceForFundsUsedDuringConstructionCapitalizedCostOfEquity
us-gaap:StatementGeographical, us-gaap:RegulatoryAgency, dei:LegalEntity
us-gaap:PublicUtilitiesRequestedRateIncreaseDecreaseAmount
us-gaap:StatementGeographical, dei:LegalEntity
us-gaap:PublicUtilitiesRequestedRateIncreaseDecreasePercentage

us-gaap:ReclassificationFromAccumulatedOtherComprehensiveIncomeCurrentPeriodBeforeTax
us-gaap:StatementEquityComponents
us-gaap:DisposalGroupClassification, us-gaap:IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperations, us-gaap:RelatedPartyTransaction, us-gaap:RelatedPartyTransactionsByRelatedParty, dei:LegalEntity
us-gaap:RelatedPartyTransactionAmountsOfTransaction
us-gaap:DisposalGroupClassification, us-gaap:IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperations, us-gaap:RelatedPartyTransaction, us-gaap:RelatedPartyTransactionsByRelatedParty, dei:LegalEntity
us-gaap:RelatedPartyTransactionPurchasesFromRelatedParty

us-gaap:RepaymentsOfShortTermDebt

us-gaap:StockGrantedDuringPeriodValueSharebasedCompensation
us-gaap:StatementEquityComponents
us-gaap:StatementEquityComponents
us-gaap:StockIssuedDuringPeriodSharesEmployeeBenefitPlan

us-gaap:StockIssuedDuringPeriodValueEmployeeBenefitPlan
us-gaap:StatementEquityComponents

us-gaap:UndistributedContinuingOperationEarningsLossAllocationToParticipatingSecuritiesBasic

us-gaap:UndistributedDiscontinuedOperationEarningsLossAllocationToParticipatingSecuritiesBasic

us-gaap:UndistributedEarningsLossAllocatedToParticipatingSecuritiesBasic

us-gaap:UtilitiesOperatingExpensePurchasedPower

us-gaap:UtilitiesOperatingExpenseTaxes

fe:AdversePowerContractLiability

fe:CashandCashEquivalentsHeldforSaleFairValueDisclosure
us-gaap:StatementBusinessSegments, us-gaap:StatementScenario
fe:DeactivatedPowerPlantsCapacity

fe:DebtSecuritiesHeldforsale

fe:DeferredChargesandOtherAssetsNoncurrent

fe:DefinedBenefitPlanMarktoMarketAdjustmentNet

fe:DisposalGroupIncludingDiscontinuedOperationInvestments
us-gaap:DerivativeInstrumentRisk, us-gaap:FairValueByFairValueHierarchyLevel
fe:FairValueMeasurementsWithUnobservableInputsReconciliationRecurringBasisAssetAndLiabilityNetValue
us-gaap:DerivativeInstrumentRisk, us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:ValuationTechnique
us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FairValueByMeasurementFrequency
fe:FairValueOfAssetsLiabilitiesNet
us-gaap:FairValueByMeasurementFrequency

fe:InvestmentsExcludesReceivablesPayablesDeferredTaxesAndAccruedIncome

fe:InvestmentsNotRequiredToBeDisclosed

fe:NetPlantExcludingConstructionWorkInProgress

fe:NuclearFuelDisposalTrust
us-gaap:StatementBusinessSegments
fe:PlantCapacity
us-gaap:StatementGeographical, us-gaap:SubsequentEventType, fe:AssetAcquisition, dei:LegalEntity

fe:PropertyPlantAndEquipmentExcludingConstructionInProgress
dei:LegalEntity, us-gaap:PublicUtilitiesRegulatoryProceeding, us-gaap:RegulatoryAgency, us-gaap:StatementGeographical, us-gaap:StatementScenario
fe:PublicUtilityCapacityShortfall
us-gaap:CreditFacility, us-gaap:Range, us-gaap:ShortTermDebtType, us-gaap:StatementScenario
fe:RatioofInterestCoverage
us-gaap:AccountsNotesLoansAndFinancingReceivableByReceivableType
us-gaap:AccountsReceivableGrossCurrent

us-gaap:AccruedEmployeeBenefitsCurrent

us-gaap:AdditionalPaidInCapitalCommonStock

us-gaap:AllowanceForDoubtfulAccountsReceivable
us-gaap:AccountsNotesLoansAndFinancingReceivableByReceivableType
us-gaap:AllowanceForDoubtfulAccountsReceivableCurrent

us-gaap:AssetRetirementObligationsNoncurrent
us-gaap:DisposalGroupClassification, us-gaap:PublicUtility, us-gaap:StatementBusinessSegments
us-gaap:AssetsOfDisposalGroupIncludingDiscontinuedOperation

us-gaap:AssetsOfDisposalGroupIncludingDiscontinuedOperationCurrent
us-gaap:FinancialInstrument
us-gaap:AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedGainBeforeTax
us-gaap:FinancialInstrument
us-gaap:AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedLossBeforeTax
us-gaap:FinancialInstrument
us-gaap:AvailableForSaleDebtSecuritiesAmortizedCostBasis
us-gaap:FinancialInstrument
us-gaap:AvailableForSaleSecuritiesDebtSecurities
us-gaap:RelatedPartyTransaction, us-gaap:RelatedPartyTransactionsByRelatedParty, dei:LegalEntity
us-gaap:BankruptcyClaimsAmountPaidToSettleClaims

us-gaap:CapitalizationLongtermDebtAndEquity

us-gaap:CashAndCashEquivalentsFairValueDisclosure

us-gaap:CommonStockValueOutstanding

us-gaap:ConstructionInProgressGross

us-gaap:DeferredIncomeTaxLiabilitiesNet
us-gaap:DerivativeInstrumentRisk, us-gaap:FairValueByFairValueHierarchyLevel
us-gaap:FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetValue
us-gaap:DerivativeInstrumentRisk, us-gaap:FairValueByFairValueHierarchyLevel
us-gaap:FairValueMeasurementWithUnobservableInputsReconciliationsRecurringBasisLiabilityValue

us-gaap:GuaranteeObligationsCurrentCarryingValue
us-gaap:GuaranteedInsuranceContractTypeOfGuarantee

us-gaap:GuaranteeObligationsMaximumExposure
us-gaap:ConsolidatedEntities
us-gaap:ConsolidatedEntities, us-gaap:GuaranteeObligationsByNature
us-gaap:GuaranteeObligationsByNature
us-gaap:GuaranteeObligationsByNature, us-gaap:StatementBusinessSegments
us-gaap:StatementBusinessSegments

us-gaap:InterestPayableCurrent

us-gaap:LiabilitiesOfDisposalGroupIncludingDiscontinuedOperationNoncurrent

us-gaap:LongTermDebtAndCapitalLeaseObligations

us-gaap:LongTermDebtAndCapitalLeaseObligationsCurrent

us-gaap:OtherLongTermInvestments

us-gaap:OtherReceivables

us-gaap:RegulatoryAssetsNoncurrent

us-gaap:RegulatoryLiabilityNoncurrent

us-gaap:RestrictedCashCurrent

us-gaap:ShortTermBorrowings

Tables

  2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-31
us-gaap:CommonStockSharesOutstanding ███▇▇▆▆▄▄▃▂▂▂▂▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁541540540532531511511477476445444444443442425425424423423422422421420420419418418418418
 us-gaap:CommonStockSharesOutstanding us-gaap:StatementEquityComponents us-gaap:CommonStock███▇▇▆▆▃▃▁542541540532531512512478477445NANANA442NANANA423NANANA421NANANA418NANANA
us-gaap:CommonStockSharesAuthorized ███████████▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁700700700700700700700700700700700490490490490490490490490490490490490490490490490490490
us-gaap:WeightedAverageNumberOfDilutedSharesOutstanding 543NA542533533NA505479478NA446445444NA427425426NA424423423NA421421420NA419418419
us-gaap:WeightedAverageNumberOfSharesOutstandingBasic 541NA538532530NA503477476NA444444443NA425425424NA423422421NA420420419NA418418418
us-gaap:EarningsPerShareBasic ▇▇▇▇▇▇▆▇█▄▇▇▇▁▇▆▇▇▇▇▇▇▇▇▇▇▇▇▇0.14-0.20.730.580.590.25-1.020.282.55-5.620.890.390.46-13.440.89-2.560.78-0.530.940.440.53-0.730.790.160.50.340.52-0.390.47
us-gaap:EarningsPerShareDiluted ▇▇▇▇▇▇▆▇█▄▇▇▇▁▇▆▇▇▇▇▇▇▇▇▇▇▇▇▇0.14-0.20.720.580.590.25-1.020.282.54-5.620.890.390.46-13.440.89-2.560.77-0.530.930.440.53-0.730.790.150.490.340.52-0.390.47
us-gaap:IncomeLossFromContinuingOperationsPerBasicShare ▆▆███▇█▇▆▁█▇█0.05-0.330.720.630.660.340.660.220.04-2.390.680.490.58NANANANA-0.530.940.440.53-0.730.790.160.290.340.5-0.40.46
us-gaap:IncomeLossFromContinuingOperationsPerDilutedShare ▆▆███▇█▇▆▁█▇█0.05-0.330.720.630.660.340.660.220.04-2.390.680.490.58NANANANA-0.530.930.440.53-0.730.790.150.290.340.5-0.40.46
  2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-31
us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax ▂▂▃▁▂▂▃▂▃▂▆▄▅▅▇▅▇▅█▅▇▅▇▅█▆▇▅▆26292673292624482806271029862629289226813714330935523375391734013869354141233465389734833888349641893633403235073723
 us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:ConsolidationItems,us-gaap:ProductOrService,us-gaap:StatementBusinessSegments us-gaap:OperatingSegments,fe:DistributionServices,fe:RegulatedDistribution▃▃█▁▄▂█▃12561230145711601286121014401228NANANANANANANANANANANANANANANANANANANANANA
 us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:ConsolidationItems,us-gaap:ProductOrService,us-gaap:StatementBusinessSegments us-gaap:OperatingSegments,fe:RetailGeneration,fe:RegulatedDistribution▄▃▆▁█▅█▃90487498980610589551059882NANANANANANANANANANANANANANANANANANANANANA
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us-gaap:StockholdersEquity ▃▃▄▄▃▃▃▄▄▁▃▃▃▃▇▇████▇████████68146975727272696932681468737699737539256406632061396241115031140712463124211262712530123481242012702126831260212692125441279912996
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us-gaap:RetainedEarningsAccumulatedDeficit ▃▃▃▃▂▂▂▂▂▁▃▃▂▂▇▇█████████████-3893-3967-3856-4247-4559-4900-5017-4559-4858-6262-3763-4159-4333-4532126411902279225624822391220522852592256024962590244826902854
us-gaap:AccumulatedOtherComprehensiveIncomeLossNetOfTax ▁▁▁▂▂▂▂▂▃▄▄▄▄▄▅▅▄▄▄▅▅▆▅▆▆▆▇▇█22027313641617386142151163175174184191179171177202230246232264271284299323361
  2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-31
us-gaap:NetCashProvidedByUsedInOperatingActivities ▂▆▇▆▃▆▆▆▁▇█▆▆▆▇▆▆▇█▆▄-5607301112807-182852846592-88010461280697785791112082263811301327797193NANANANANANANANA
us-gaap:NetCashProvidedByUsedInInvestingActivities ▆▄▅▅▆▅▆█▁▇▆▅▅▄▅▃▄▄▆▃▅-659-792-745-706-630-781-672-422-1143-535-670-749-762-805-709-902-865-835-594-945-748NANANANANANANANA
us-gaap:NetCashProvidedByUsedInFinancingActivities ▅▃▃▄▅▃▃▃█▂▂▃▃▂▃▄▄▂▁▄▅725-9-91163593-129-11-1451679-321-3252-58-338-59133242-250-741152560NANANANANANANANA
  2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-31
us-gaap:NetCashProvidedByUsedInOperatingActivities ▂▆▇▆▃▆▆▆▁▇█▆▆▆▇▆▆▇█▆▄-5607301112807-182852846592-88010461280697785791112082263811301327797193NANANANANANANANA
us-gaap:NetIncomeLoss ▇▇▇▇▇▇▆▇█▄▇▇▇▁▇▆▇▆▇▇▇▆▇▇▇▇▇▇▇74-111391312320138-4582991369-2499396174205-5796380-1089328-226395187222-30633364208142218-164196
 us-gaap:NetIncomeLoss us-gaap:StatementEquityComponents us-gaap:RetainedEarnings74NA391312320NA-4582991369NANANANANANANANANANANANANANANANANANANANA
us-gaap:DepreciationDepletionAndAmortization ▃▁▄▄▄▄▅▄▃▅▅▅▅▇▆▆▅▅▆▅▅█▄▄▃295148367357345381399324280452456400392557518467455453514444425632343322266NA628374352
  2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-31
us-gaap:NetCashProvidedByUsedInInvestingActivities ▆▄▅▅▆▅▆█▁▇▆▅▅▄▅▃▄▄▆▃▅-659-792-745-706-630-781-672-422-1143-535-670-749-762-805-709-902-865-835-594-945-748NANANANANANANANA
  2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-31
us-gaap:NetCashProvidedByUsedInFinancingActivities ▅▃▃▄▅▃▃▃█▂▂▃▃▂▃▄▄▂▁▄▅725-9-91163593-129-11-1451679-321-3252-58-338-59133242-250-741152560NANANANANANANANA
us-gaap:ProceedsFromIssuanceOfLongTermDebt ▅▁▁▂▄▃▁▂▁▂▂█▂▄▂▁▁▁▃▁▁▃▂▅▄2000200150550140085017445006255503250250145552100227884200075064116701467NANANA1800
 us-gaap:ProceedsFromIssuanceOfLongTermDebt us-gaap:FairValueByMeasurementBasis us-gaap:CarryingReportedAmountFairValueDisclosure█▁▁2000200150NANANANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:RepaymentsOfLongTermDebt ▅▁▁▂▄▃▁▅█▄▆▃▂▇▃▄▁▁▃▂▁▄▂▃▃7785271296283302777514765809765242111314436550319848924448697137436489NANANA956
 us-gaap:RepaymentsOfLongTermDebt us-gaap:FairValueByMeasurementBasis us-gaap:CarryingReportedAmountFairValueDisclosure█▁▁778527NANANANANANANANANANANANANANANANANANANANANANANANANANA
  2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-31
us-gaap:RepaymentsOfLongTermDebt ▅▁▁▂▄▃▁▅█▄▆▃▂▇▃▄▁▁▃▂▁▄▂▃▃7785271296283302777514765809765242111314436550319848924448697137436489NANANA956
 us-gaap:RepaymentsOfLongTermDebt us-gaap:FairValueByMeasurementBasis us-gaap:CarryingReportedAmountFairValueDisclosure█▁▁778527NANANANANANANANANANANANANANANANANANANANANANANANANANA

Common Stock Value

Common Stock Par Or Stated Value Per Share

Common Stock Shares Issued

Common Stock Shares Outstanding

us-gaap:CommonStockSharesOutstanding



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302010-12-312009-12-31
Value541540540532531511511477476445444444443442425425424423423422422421420420419418418418418418418418418418418418304304
Percentage of CommonStockSharesOutstanding100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:StatementClassOfStock

us-gaap:ConvertiblePreferredStock



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312016-12-312015-12-31
Value000000011000
Percentage of CommonStockSharesOutstanding0.00.00.00.00.00.10.10.30.30.00.00.0

us-gaap:StatementEquityComponents

us-gaap:CommonStock



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-312010-12-312009-12-312008-12-312007-12-31
Value542541540532531512512478477445442423421418418418304304304304
Percentage of CommonStockSharesOutstanding100.0100.199.9100.099.9100.0100.1100.1100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.00.0

Common Stock Shares Authorized

us-gaap:CommonStockSharesAuthorized



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302010-12-312009-12-31
Value700700700700700700700700700700700490490490490490490490490490490490490490490490490490490490490490490490490490375375
Percentage of CommonStockSharesAuthorized100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Weighted Average Number Of Diluted Shares Outstanding

us-gaap:WeightedAverageNumberOfDilutedSharesOutstanding



Period End2020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-312017-09-302017-06-302017-03-312016-09-302016-06-302016-03-312015-09-302015-06-302015-03-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-312012-09-302012-06-302012-03-312011-09-302011-06-302011-03-312010-09-302010-06-302010-03-31
Value543542533533505479478446445444427425426424423423421421420419418419419419420420420343305305306
Percentage of WeightedAverageNumberOfDilutedSharesOutstanding100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Weighted Average Number Of Shares Outstanding Basic

us-gaap:WeightedAverageNumberOfSharesOutstandingBasic



Period End2020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-312017-09-302017-06-302017-03-312016-09-302016-06-302016-03-312015-09-302015-06-302015-03-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-312012-09-302012-06-302012-03-312011-09-302011-06-302011-03-312010-09-302010-06-302010-03-31
Value541538532530503477476444444443425425424423422421420420419418418418417417418418418342304304304
Percentage of WeightedAverageNumberOfSharesOutstandingBasic100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Earnings Per Share Basic

us-gaap:EarningsPerShareBasic



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-09-302010-06-302010-03-31
Value0.14-0.20.730.580.590.25-1.020.282.55-5.620.890.390.46-13.440.89-2.560.78-0.530.940.440.53-0.730.790.160.50.340.52-0.390.47-0.351.020.450.730.231.220.430.150.590.870.51
Percentage of EarningsPerShareBasic100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Earnings Per Share Diluted

us-gaap:EarningsPerShareDiluted



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-09-302010-06-302010-03-31
Value0.14-0.20.720.580.590.25-1.020.282.54-5.620.890.390.46-13.440.89-2.560.77-0.530.930.440.53-0.730.790.150.490.340.52-0.390.47-0.351.010.450.730.231.220.430.150.590.870.51
Percentage of EarningsPerShareDiluted100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Income Loss From Continuing Operations Per Basic Share

us-gaap:IncomeLossFromContinuingOperationsPerBasicShare



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-31
Value0.05-0.330.720.630.660.340.660.220.04-2.390.680.490.58-0.530.940.440.53-0.730.790.160.290.340.5-0.40.46-0.361.010.440.72
Percentage of IncomeLossFromContinuingOperationsPerBasicShare100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Income Loss From Continuing Operations Per Diluted Share

us-gaap:IncomeLossFromContinuingOperationsPerDilutedShare



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-31
Value0.05-0.330.720.630.660.340.660.220.04-2.390.680.490.58-0.530.930.440.53-0.730.790.150.290.340.5-0.40.46-0.361.00.440.72
Percentage of IncomeLossFromContinuingOperationsPerDilutedShare100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Revenue From Contract With Customer Excluding Assessed Tax

us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-31
Value26292673292624482806271029862629289226813714330935523375391734013869354141233465389734833888349641893633403235073723
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ConsolidationItems

us-gaap:IntersegmentElimination



Period End2020-03-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value-35-33-32-30-29-302794
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax-1.3-1.1-1.3-1.1-1.1-1.01.03.3
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax-1.3-1.1-1.3-1.1-1.1-1.01.03.3
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:IntersegmentElimination100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ConsolidationItems, us-gaap:ProductOrService

us-gaap:IntersegmentElimination, fe:DistributionServices



Period End2020-03-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-30
Value-21-21-21-21-23-22-47
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax-0.8-0.7-0.9-0.7-0.8-0.7-1.8
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax-0.8-0.7-0.9-0.7-0.8-0.7-1.8
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:IntersegmentElimination fe:DistributionServices100.0100.0100.0100.0100.0100.0100.0

us-gaap:IntersegmentElimination, fe:OtherServices



Period End2020-03-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-30
Value0001003
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax0.00.00.00.00.00.00.1
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax0.00.00.00.00.00.00.1
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:IntersegmentElimination fe:OtherServices0.00.00.0100.00.00.0100.0

us-gaap:IntersegmentElimination, fe:RetailGeneration



Period End2020-03-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-30
Value-15-14-14-14-12-14-14
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax-0.6-0.5-0.6-0.5-0.4-0.5-0.5
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax-0.6-0.5-0.6-0.5-0.4-0.5-0.5
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:IntersegmentElimination fe:RetailGeneration100.0100.0100.0100.0100.0100.0100.0

us-gaap:IntersegmentElimination, fe:WholesaleSales



Period End2020-03-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-30
Value1234665
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax0.00.10.10.10.20.20.2
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax0.00.10.10.10.20.20.2
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:IntersegmentElimination fe:WholesaleSales100.0100.0100.0100.0100.0100.0100.0

us-gaap:ConsolidationItems, us-gaap:ProductOrService, us-gaap:StatementBusinessSegments

us-gaap:OperatingSegments, fe:DistributionServices, fe:RegulatedDistribution



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-30
Value12561230145711601286121014401228
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax47.846.049.847.445.844.648.246.7
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax47.846.049.847.445.844.648.246.7
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:OperatingSegments fe:DistributionServices fe:RegulatedDistribution100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OperatingSegments, fe:OtherServices, fe:RegulatedDistribution



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-30
Value3637423734314335
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax1.41.41.41.51.21.11.41.3
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax1.41.41.41.51.21.11.41.3
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:OperatingSegments fe:OtherServices fe:RegulatedDistribution100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OperatingSegments, fe:RetailGeneration, fe:RegulatedDistribution



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-30
Value90487498980610589551059882
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax34.432.733.832.937.735.235.533.5
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax34.432.733.832.937.735.235.533.5
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:OperatingSegments fe:RetailGeneration fe:RegulatedDistribution100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OperatingSegments, fe:TransmissionServices, fe:RegulatedTransmission



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-30
Value397420371367352339341336
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax15.115.712.715.012.512.511.412.8
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax15.115.712.715.012.512.511.412.8
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:OperatingSegments fe:TransmissionServices fe:RegulatedTransmission100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OperatingSegments, fe:WholesaleSales, fe:RegulatedDistribution



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-30
Value7195100110106125133121
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax2.73.63.44.53.84.64.54.6
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax2.73.63.44.53.84.64.54.6
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:OperatingSegments fe:WholesaleSales fe:RegulatedDistribution100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ConsolidationItems, us-gaap:StatementBusinessSegments

us-gaap:OperatingSegments, fe:RegulatedDistribution



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value226722362588211324842321267522662479
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax86.283.788.486.388.585.689.686.285.7
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax86.283.788.486.388.585.689.686.285.7
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:OperatingSegments fe:RegulatedDistribution100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OperatingSegments, fe:RegulatedTransmission



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value397420371367352339341336319
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax15.115.712.715.012.512.511.412.811.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax15.115.712.715.012.512.511.412.811.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:OperatingSegments fe:RegulatedTransmission100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ProductOrService

fe:DistributionServices



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-30
Value12351210143611391265118714181181
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax47.045.349.146.545.143.847.544.9
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax47.045.349.146.545.143.847.544.9
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax fe:DistributionServices100.0100.0100.0100.0100.0100.0100.0100.0

fe:OtherServices



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-30
Value3638423735314338
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax1.41.41.41.51.21.11.41.4
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax1.41.41.41.51.21.11.41.4
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax fe:OtherServices100.0100.0100.0100.0100.0100.0100.0100.0

fe:RetailGeneration



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-30
Value88985997579210449431045868
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax33.832.133.332.437.234.835.033.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax33.832.133.332.437.234.835.033.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax fe:RetailGeneration100.0100.0100.0100.0100.0100.0100.0100.0

fe:TransmissionServices



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-30
Value397420371367352339341336
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax15.115.712.715.012.512.511.412.8
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax15.115.712.715.012.512.511.412.8
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax fe:TransmissionServices100.0100.0100.0100.0100.0100.0100.0100.0

fe:WholesaleSales



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-30
Value7298102113110131139126
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax2.73.73.54.63.94.84.74.8
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax2.73.73.54.63.94.84.74.8
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax fe:WholesaleSales100.0100.0100.0100.0100.0100.0100.0100.0

Revenues

us-gaap:Revenues



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-31
Value27092673296325162883271030642625286226813714330935523375391734013869354141233465389734833888349641893633403235073723
Percentage of Revenues100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax103.0100.0101.3102.8102.7100.0102.699.899.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ConsolidationItems

us-gaap:CorporateNonSegment



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-09-302017-06-302017-03-312016-09-302016-06-302016-03-312015-09-30
Value1-199235-223611110000000
Percentage of Revenues0.0-7.40.10.10.2-8.20.20.40.40.00.00.00.00.00.00.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax0.0-7.40.10.10.2-8.20.20.40.40.00.00.00.00.00.00.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:CorporateNonSegment0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:IntersegmentElimination



Period End2020-03-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-09-302017-06-302017-03-312016-09-302016-06-302016-03-312015-09-302015-06-302015-03-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-31
Value-50-48-48-46-42-48-68-37-93-86-117-11700000000000
Percentage of Revenues-1.8-1.6-1.9-1.6-1.5-1.6-2.6-1.3-2.5-2.6-3.3-3.00.00.00.00.00.00.00.00.00.00.00.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax-1.9-1.6-2.0-1.6-1.5-1.6-2.6-1.3-2.5-2.6-3.3-3.00.00.00.00.00.00.00.00.00.00.00.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:IntersegmentElimination142.9145.5150.0153.3144.8160.0-251.9-39.40.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:MaterialReconcilingItems



Period End2020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-312017-09-302017-06-302017-03-312016-09-302016-06-302016-03-312015-09-30
Value-51-50-51-51-54-79-48-34-58-65-68-71-79-76
Percentage of Revenues-1.9-1.7-2.0-1.8-1.8-3.0-1.7-0.9-1.8-1.8-1.7-2.1-2.0-1.8
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax-1.9-1.7-2.1-1.8-1.8-3.0-1.7-0.9-1.8-1.8-1.7-2.1-2.0-1.8
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:MaterialReconcilingItems0.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:ConsolidationItems, us-gaap:MajorCustomers

us-gaap:CorporateNonSegment, fe:ExternalCustomers



Period End2020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-31
Value1235645
Percentage of Revenues0.00.10.10.20.20.20.2
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax0.00.10.10.20.20.20.2
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:CorporateNonSegment fe:ExternalCustomers0.00.00.00.00.00.00.0

us-gaap:CorporateNonSegment, fe:InternalCustomers



Period End2020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-31
Value0000076
Percentage of Revenues0.00.00.00.00.00.30.2
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax0.00.00.00.00.00.30.2
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:CorporateNonSegment fe:InternalCustomers0.00.00.00.00.00.00.0

us-gaap:MaterialReconcilingItems, fe:InternalCustomers



Period End2020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-31
Value-51-50-51-51-54-79-48
Percentage of Revenues-1.9-1.7-2.0-1.8-1.8-3.0-1.7
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax-1.9-1.7-2.1-1.8-1.8-3.0-1.7
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:MaterialReconcilingItems fe:InternalCustomers0.00.00.00.00.00.00.0

us-gaap:ConsolidationItems, us-gaap:MajorCustomers, us-gaap:StatementBusinessSegments

us-gaap:OperatingSegments, fe:ExternalCustomers, fe:RegulatedDistribution



Period End2020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-31
Value2311259021452526271722852538
Percentage of Revenues85.387.485.387.688.787.088.7
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax87.988.587.690.091.086.987.8
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:OperatingSegments fe:ExternalCustomers fe:RegulatedDistribution0.00.00.00.00.00.00.0

us-gaap:OperatingSegments, fe:ExternalCustomers, fe:RegulatedTransmission



Period End2020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-31
Value397371368352341336319
Percentage of Revenues14.712.514.612.211.112.811.1
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax15.112.715.012.511.412.811.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:OperatingSegments fe:ExternalCustomers fe:RegulatedTransmission0.00.00.00.00.00.00.0

us-gaap:OperatingSegments, fe:InternalCustomers, fe:RegulatedDistribution



Period End2020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-31
Value47464747496738
Percentage of Revenues1.71.61.91.61.62.61.3
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax1.81.61.91.71.62.51.3
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:OperatingSegments fe:InternalCustomers fe:RegulatedDistribution0.00.00.00.00.00.00.0

us-gaap:OperatingSegments, fe:InternalCustomers, fe:RegulatedTransmission



Period End2020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-31
Value4444554
Percentage of Revenues0.10.10.20.10.20.20.1
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax0.20.10.20.10.20.20.1
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:OperatingSegments fe:InternalCustomers fe:RegulatedTransmission0.00.00.00.00.00.00.0

us-gaap:ConsolidationItems, us-gaap:ProductOrService

us-gaap:IntersegmentElimination, fe:AlternativeRevenueProgram



Period End2020-03-31
Value0.0
Percentage of Revenues0.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax0.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:IntersegmentElimination fe:AlternativeRevenueProgram0.0

us-gaap:IntersegmentElimination, us-gaap:ProductAndServiceOther



Period End2020-03-31
Value-15
Percentage of Revenues-0.6
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax-0.6
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:IntersegmentElimination us-gaap:ProductAndServiceOther0.0

us-gaap:ConsolidationItems, us-gaap:ProductOrService, us-gaap:StatementBusinessSegments

us-gaap:OperatingSegments, fe:AlternativeRevenueProgram, fe:RegulatedDistribution



Period End2020-03-31
Value68
Percentage of Revenues2.5
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax2.6
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:OperatingSegments fe:AlternativeRevenueProgram fe:RegulatedDistribution0.0

us-gaap:OperatingSegments, fe:AlternativeRevenueProgram, fe:RegulatedTransmission



Period End2020-03-31
Value0.0
Percentage of Revenues0.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax0.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:OperatingSegments fe:AlternativeRevenueProgram fe:RegulatedTransmission0.0

us-gaap:OperatingSegments, us-gaap:ProductAndServiceOther, fe:RegulatedDistribution



Period End2020-03-31
Value23
Percentage of Revenues0.8
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax0.9
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:OperatingSegments us-gaap:ProductAndServiceOther fe:RegulatedDistribution0.0

us-gaap:OperatingSegments, us-gaap:ProductAndServiceOther, fe:RegulatedTransmission



Period End2020-03-31
Value4
Percentage of Revenues0.1
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax0.2
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:OperatingSegments us-gaap:ProductAndServiceOther fe:RegulatedTransmission0.0

us-gaap:ConsolidationItems, us-gaap:StatementBusinessSegments

us-gaap:OperatingSegments, fe:RegulatedDistribution



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-09-302017-06-302017-03-312016-09-302016-06-302016-03-312015-09-302014-03-312013-03-31
Value235822972636219225732409276623522576261022622490270221892510262425522212
Percentage of Revenues87.085.989.087.189.288.990.389.690.070.368.470.169.064.464.963.660.959.4
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax89.785.990.189.591.788.992.689.589.170.368.470.169.064.464.963.660.959.4
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:OperatingSegments fe:RegulatedDistribution104.0102.7101.9103.7103.6103.8103.4103.8103.90.00.00.00.00.00.00.00.00.0

us-gaap:OperatingSegments, fe:RegulatedTransmission



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-09-302017-06-302017-03-312016-09-302016-06-302016-03-312015-09-302014-03-312013-03-31
Value401423375372356343346341323342327313285275286248187176
Percentage of Revenues14.815.812.714.812.312.711.313.011.39.29.98.87.38.17.46.04.54.7
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax15.315.812.815.212.712.711.613.011.29.29.98.87.38.17.46.04.54.7
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:OperatingSegments fe:RegulatedTransmission101.0100.7101.1101.4101.1101.2101.5101.5101.30.00.00.00.00.00.00.00.00.0

us-gaap:MajorCustomers

fe:ExternalCustomers



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value270926732963251628832710306426252862
Percentage of Revenues100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax103.0100.0101.3102.8102.7100.0102.699.899.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax fe:ExternalCustomers0.00.00.00.00.00.00.00.00.0

us-gaap:MajorCustomers, us-gaap:StatementBusinessSegments

fe:Atsi, fe:RegulatedTransmission



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value204212184184174172167167158
Percentage of Revenues7.57.96.27.36.06.35.56.45.5
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax7.87.96.37.56.26.35.66.45.5
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax fe:Atsi fe:RegulatedTransmission0.00.00.00.00.00.00.00.00.0

fe:CommercialCustomers, fe:RegulatedDistribution



Period End2020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-31
Value544600572587628570580
Percentage of Revenues20.120.222.720.420.521.720.3
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax20.720.523.420.921.021.720.1
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax fe:CommercialCustomers fe:RegulatedDistribution0.00.00.00.00.00.00.0

fe:IndustrialCustomers, fe:RegulatedDistribution



Period End2020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-31
Value277286251249276262254
Percentage of Revenues10.29.710.08.69.010.08.9
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax10.59.810.38.99.210.08.8
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax fe:IndustrialCustomers fe:RegulatedDistribution0.00.00.00.00.00.00.0

fe:MidAtlanticInterstateTransmissionLLC, fe:RegulatedTransmission



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value576758504944433430
Percentage of Revenues2.12.52.02.01.71.61.41.31.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax2.22.52.02.01.71.61.41.31.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax fe:MidAtlanticInterstateTransmissionLLC fe:RegulatedTransmission0.00.00.00.00.00.00.00.00.0

fe:OtherCustomers, fe:RegulatedDistribution



Period End2020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-31
Value20222024232324
Percentage of Revenues0.70.70.80.80.80.90.8
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax0.80.80.80.90.80.90.8
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax fe:OtherCustomers fe:RegulatedDistribution0.00.00.00.00.00.00.0

fe:OtherCustomers, fe:RegulatedTransmission



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value737174747169717271
Percentage of Revenues2.72.72.52.92.52.52.32.72.5
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax2.82.72.53.02.52.52.42.72.5
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax fe:OtherCustomers fe:RegulatedTransmission0.00.00.00.00.00.00.00.00.0

fe:ResidentialCustomers, fe:RegulatedDistribution



Period End2020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-31
Value1319153811231484157212551463
Percentage of Revenues48.751.944.651.551.347.851.1
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax50.252.645.952.952.647.750.6
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax fe:ResidentialCustomers fe:RegulatedDistribution0.00.00.00.00.00.00.0

fe:Trail, fe:RegulatedTransmission



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value637055595854606360
Percentage of Revenues2.32.61.92.32.02.02.02.42.1
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax2.42.61.92.42.12.02.02.42.1
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax fe:Trail fe:RegulatedTransmission0.00.00.00.00.00.00.00.00.0

us-gaap:ProductOrService

fe:AlternativeRevenueProgram



Period End2020-03-31
Value68
Percentage of Revenues2.5
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax2.6
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax fe:AlternativeRevenueProgram0.0

fe:ElectricWorldwideUnregulatedRevenue



Period End2020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-312017-09-30
Value188181218222260240248239
Percentage of Revenues6.96.18.77.78.59.18.76.4
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax7.26.28.97.98.79.18.66.4
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax fe:ElectricWorldwideUnregulatedRevenue0.00.00.00.00.00.00.00.0

us-gaap:ElectricTransmission



Period End2020-03-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-30
Value397371367352339341336319339337
Percentage of Revenues14.712.514.612.212.511.112.811.112.69.1
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax15.112.715.012.512.511.412.811.012.69.1
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:ElectricTransmission0.00.00.00.00.00.00.00.00.00.0

us-gaap:ElectricityUsRegulated



Period End2020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-312017-09-30
Value21242411193123092463204922952334
Percentage of Revenues78.481.476.780.180.478.180.262.8
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax80.882.478.982.382.577.979.462.8
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:ElectricityUsRegulated0.00.00.00.00.00.00.00.0

us-gaap:ProductAndServiceOther



Period End2020-03-31
Value12
Percentage of Revenues0.4
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax0.5
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:ProductAndServiceOther0.0

us-gaap:StatementBusinessSegments

fe:RegulatedDistribution



Period End2020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-312016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-09-302012-06-302012-03-312011-09-302011-06-30
Value21602446196623442499211023212200252122002624223925622130235720652552213623372038221224382095235428652409
Percentage of Revenues79.782.678.181.381.680.481.164.765.262.163.664.665.761.260.659.160.958.858.058.159.40.00.00.00.00.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax82.283.680.383.583.780.380.364.765.262.163.664.665.761.260.659.160.958.858.058.159.40.00.00.00.00.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax fe:RegulatedDistribution0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

fe:RegulatedTransmission



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-09-302012-06-302012-03-312011-09-302011-06-30
Value397420371367352339341336319264275256248269238199197191187187189179176187184186181182
Percentage of Revenues14.715.712.514.612.212.511.112.811.17.87.17.26.07.86.15.75.15.54.55.14.75.14.70.00.00.00.00.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax15.115.712.715.012.512.511.412.811.07.87.17.26.07.86.15.75.15.54.55.14.75.14.70.00.00.00.00.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax fe:RegulatedTransmission0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

Sales Revenue Net

Operating Costs And Expenses

Costs And Expenses

us-gaap:CostsAndExpenses



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-312012-09-302012-06-302012-03-312011-09-302011-06-302011-03-312010-09-302010-06-302010-03-31
Value21772058228219312254219823542017237952722830276529781229930564376309333053215291133033820317232043791352434653075340433123332369735743261331326132883
Percentage of CostsAndExpenses100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax82.877.078.078.980.381.178.876.782.3196.676.283.683.8364.478.0128.779.993.378.084.084.8109.781.691.690.587.498.882.60.00.00.00.00.00.00.00.00.0

Operating Income Loss

us-gaap:OperatingIncomeLoss



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312009-09-302009-06-302009-03-31
Value532615681585629512710687597-1830884544574-8924861-975776236908554594-33771629239840151254654-34907557746-2301022486315448415526416244487802346
Percentage of OperatingIncomeLoss100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax20.223.023.323.922.418.923.826.120.6-68.323.816.416.2-264.422.0-28.720.16.722.016.015.2-9.718.48.49.511.012.71.517.60.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

Interest Expense

us-gaap:InterestExpense



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-312012-09-302012-06-302012-03-31
Value263260261259253258255369250296305290287294286289288286285282279271275262265257256256230274246
Percentage of InterestExpense100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax10.09.78.910.69.09.58.514.08.611.08.28.88.18.77.38.57.48.16.98.17.27.87.17.56.36.47.36.90.00.00.0

us-gaap:ConsolidationItems

us-gaap:CorporateNonSegment



Period End2020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-312017-09-302017-06-302017-03-312016-09-302016-06-302016-03-312015-09-30
Value90959593932089290706556545148
Percentage of InterestExpense34.236.436.736.836.556.436.829.524.122.619.618.717.716.8
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax3.43.23.93.33.17.93.22.42.11.81.41.61.31.2
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:CorporateNonSegment0.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:MaterialReconcilingItems



Period End2020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-312017-09-302017-06-302017-03-312016-09-302016-06-302016-03-312015-09-30
Value-6-7-8-7-8-10-90000000
Percentage of InterestExpense-2.3-2.7-3.1-2.8-3.1-2.7-3.60.00.00.00.00.00.00.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax-0.2-0.2-0.3-0.2-0.3-0.4-0.30.00.00.00.00.00.00.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:MaterialReconcilingItems0.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:ConsolidationItems, us-gaap:StatementBusinessSegments

us-gaap:OperatingSegments, fe:RegulatedDistribution



Period End2020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-312017-09-302017-06-302017-03-312016-09-302016-06-302016-03-312015-09-30
Value127124124122127129128133134138139148150149
Percentage of InterestExpense48.347.547.948.249.835.051.243.646.248.148.651.252.152.3
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax4.84.25.14.34.34.94.43.64.03.93.54.43.93.6
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:OperatingSegments fe:RegulatedDistribution5.64.85.94.94.75.75.20.00.00.00.00.00.00.0

us-gaap:OperatingSegments, fe:RegulatedTransmission



Period End2020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-312017-09-302017-06-302017-03-312016-09-302016-06-302016-03-312015-09-30
Value5249484543423938393943394040
Percentage of InterestExpense19.818.818.517.816.911.415.612.513.413.615.013.513.914.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax2.01.72.01.61.41.61.31.01.21.11.11.11.01.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:OperatingSegments fe:RegulatedTransmission13.113.213.112.812.612.512.20.00.00.00.00.00.00.0

Interest And Debt Expense

us-gaap:InterestAndDebtExpense



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-312012-09-302012-06-302012-03-312011-09-302011-06-302011-03-312010-09-302010-06-302010-03-31
Value263260261259253258255369250296305290287294286289288286285282279271275262265257256256230274246267265231208207213
Percentage of InterestAndDebtExpense100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax10.09.78.910.69.09.58.514.08.611.08.28.88.18.77.38.57.48.16.98.17.27.87.17.56.36.47.36.90.00.00.00.00.00.00.00.00.0

us-gaap:DerivativeInstrumentRisk, us-gaap:ReclassificationOutOfAccumulatedOtherComprehensiveIncome, us-gaap:StatementEquityComponents

us-gaap:OtherContract, us-gaap:ReclassificationOutOfAccumulatedOtherComprehensiveIncome, us-gaap:AccumulatedGainLossNetCashFlowHedgeParent



Period End2020-03-312019-03-31
Value0.0-1000000.0
Percentage of InterestAndDebtExpense0.0-0.4
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax0.0-0.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:OtherContract us-gaap:ReclassificationOutOfAccumulatedOtherComprehensiveIncome us-gaap:AccumulatedGainLossNetCashFlowHedgeParent0.00.0

Other Nonoperating Income Expense

us-gaap:OtherNonoperatingIncomeExpense



Period End2020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-312017-09-302017-06-302017-03-31
Value100578054494867191114
Percentage of OtherNonoperatingIncomeExpense100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax3.81.93.31.91.61.82.30.50.30.4

us-gaap:ConsolidationItems

us-gaap:CorporateNonSegment



Period End2020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-312017-09-302017-06-302017-03-31
Value2524381119-11615106
Percentage of OtherNonoperatingIncomeExpense25.042.147.520.438.8-2.123.978.990.942.9
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax1.00.81.60.40.6-0.00.60.40.30.2
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:CorporateNonSegment0.00.00.00.00.00.00.00.00.00.0

us-gaap:MaterialReconcilingItems



Period End2020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-312017-09-302017-06-302017-03-31
Value-6-7-8-7-8-10-9-13-13-7
Percentage of OtherNonoperatingIncomeExpense-6.0-12.3-10.0-13.0-16.3-20.8-13.4-68.4-118.2-50.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax-0.2-0.2-0.3-0.2-0.3-0.4-0.3-0.4-0.4-0.2
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:MaterialReconcilingItems0.00.00.00.00.00.00.00.00.00.0

us-gaap:ConsolidationItems, us-gaap:StatementBusinessSegments

us-gaap:OperatingSegments, fe:RegulatedDistribution



Period End2020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-312017-09-302017-06-302017-03-31
Value75364646345656161415
Percentage of OtherNonoperatingIncomeExpense75.063.257.585.269.4116.783.684.2127.3107.1
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax2.91.21.91.61.12.11.90.40.40.4
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:OperatingSegments fe:RegulatedDistribution3.31.42.21.91.32.52.30.00.00.0

us-gaap:OperatingSegments, fe:RegulatedTransmission



Period End2020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-312017-09-302017-06-302017-03-31
Value6444434100
Percentage of OtherNonoperatingIncomeExpense6.07.05.07.48.26.26.05.30.00.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax0.20.10.20.10.10.10.10.00.00.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:OperatingSegments fe:RegulatedTransmission1.51.11.11.11.20.91.30.00.00.0

Income Loss From Continuing Operations

Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest

us-gaap:IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-312012-09-302012-06-302012-03-312011-09-302011-06-30
Value-36-249496422448169520382429-2086635291331-9185631-1219541-396621302366-57448590170286-222312734315528855307
Percentage of IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax-1.4-9.317.017.216.06.217.414.514.8-77.817.18.89.3-272.116.1-35.814.0-11.215.18.79.4-16.512.52.64.17.1-6.38.40.00.00.00.00.0

Income Loss From Continuing Operations Including Portion Attributable To Noncontrolling Interest

us-gaap:IncomeLossFromContinuingOperationsIncludingPortionAttributableToNoncontrollingInterest



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-31
Value24-181389341355182387267177-1061301219257-226395187222-30633364122142209-168192-153422184302
Percentage of IncomeLossFromContinuingOperationsIncludingPortionAttributableToNoncontrollingInterest100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax0.9-6.813.313.912.76.713.010.26.1-39.68.16.67.2-6.49.65.45.7-8.88.61.82.93.95.2-4.85.20.00.00.00.0

us-gaap:ConsolidationItems

us-gaap:CorporateNonSegment



Period End2020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-312017-09-302017-06-302017-03-31
Value-229-94-33-78-128-214-244-97-78-68
Percentage of IncomeLossFromContinuingOperationsIncludingPortionAttributableToNoncontrollingInterest-954.2-24.2-9.7-22.0-33.1-80.1-137.9-32.2-35.6-26.5
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax-8.7-3.2-1.3-2.8-4.3-8.1-8.4-2.6-2.4-1.9
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:CorporateNonSegment0.00.00.00.00.00.00.00.00.00.0

us-gaap:ConsolidationItems, us-gaap:StatementBusinessSegments

us-gaap:OperatingSegments, fe:RegulatedDistribution



Period End2020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-312017-09-302017-06-302017-03-31
Value136370258329416377322314205237
Percentage of IncomeLossFromContinuingOperationsIncludingPortionAttributableToNoncontrollingInterest566.795.175.792.7107.5141.2181.9104.393.692.2
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax5.212.610.511.713.914.311.18.56.26.7
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:OperatingSegments fe:RegulatedDistribution6.014.312.213.215.616.613.00.00.00.0

us-gaap:OperatingSegments, fe:RegulatedTransmission



Period End2020-03-312019-03-31
Value117104
Percentage of IncomeLossFromContinuingOperationsIncludingPortionAttributableToNoncontrollingInterest487.529.3
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax4.53.7
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:OperatingSegments fe:RegulatedTransmission29.529.5

Nonoperating Income Expense

us-gaap:NonoperatingIncomeExpense



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-312012-09-302012-06-302012-03-312011-09-302011-06-302011-03-312010-09-302010-06-302010-03-31
Value-568-864-185-163-181-343-190-305-168-256-249-253-243-261-230-244-235-632-287-252-228-237-231-202-228-226-276-342-173-242-218-202-214-192-121-136-156
Percentage of NonoperatingIncomeExpense100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax-21.6-32.3-6.3-6.7-6.5-12.7-6.4-11.6-5.8-9.5-6.7-7.6-6.8-7.7-5.9-7.2-6.1-17.8-7.0-7.3-5.9-6.8-5.9-5.8-5.4-5.6-7.9-9.20.00.00.00.00.00.00.00.00.0

Income Tax Expense Benefit

us-gaap:IncomeTaxExpenseBenefit



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312009-09-302009-06-302009-03-31
Value-60-681078193-13133115252413239117126-3389251-130213-170226115144-26815226486677-58116-1053091272222431110178118119134111-18512824854
Percentage of IncomeTaxExpenseBenefit100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax-2.3-2.53.73.33.3-0.54.54.48.715.46.43.53.5-100.46.4-3.85.5-4.85.53.33.7-7.73.90.71.11.81.9-1.73.10.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:ConsolidationItems

us-gaap:CorporateNonSegment



Period End2020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-312017-09-302017-06-302017-03-312016-09-302016-06-302016-03-312015-09-30
Value-62-22-16-27-27-61127-33-27-29-11-26-13-39
Percentage of IncomeTaxExpenseBenefit103.3-20.6-19.8-29.0-20.3-53.050.4-13.8-23.1-23.0-4.420.0-6.1-17.3
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax-2.4-0.8-0.7-1.0-0.9-2.34.4-0.9-0.8-0.8-0.3-0.8-0.3-0.9
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:CorporateNonSegment0.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:MaterialReconcilingItems



Period End2020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-312017-09-302017-06-302017-03-312016-09-302016-06-302016-03-312015-09-30
Value00000000001003
Percentage of IncomeTaxExpenseBenefit-0.00.00.00.00.00.00.00.00.00.00.4-0.00.01.3
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax0.00.00.00.00.00.00.00.00.00.00.00.00.00.1
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:MaterialReconcilingItems0.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:ConsolidationItems, us-gaap:StatementBusinessSegments

us-gaap:OperatingSegments, fe:RegulatedDistribution



Period End2020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-312017-09-302017-06-302017-03-312016-09-302016-06-302016-03-312015-09-30
Value-321036789126138931831211381678094137
Percentage of IncomeTaxExpenseBenefit53.396.382.795.794.7120.036.976.6103.4109.566.5-61.544.160.6
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax-1.23.52.73.24.25.23.24.93.73.94.32.42.43.3
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:OperatingSegments fe:RegulatedDistribution-1.44.03.23.64.76.13.80.00.00.00.00.00.00.0

us-gaap:OperatingSegments, fe:RegulatedTransmission



Period End2020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-312017-09-302017-06-302017-03-312016-09-302016-06-302016-03-312015-09-30
Value3426303134383249535245464741
Percentage of IncomeTaxExpenseBenefit-56.724.337.033.325.633.012.720.545.341.317.9-35.422.118.1
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax1.30.91.21.11.11.41.11.31.61.51.11.41.21.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:OperatingSegments fe:RegulatedTransmission8.67.08.28.810.011.310.00.00.00.00.00.00.00.0

us-gaap:ReclassificationOutOfAccumulatedOtherComprehensiveIncome, us-gaap:StatementEquityComponents

us-gaap:ReclassificationOutOfAccumulatedOtherComprehensiveIncome, us-gaap:AccumulatedDefinedBenefitPlansAdjustmentNetPriorServiceCostCredit



Period End2020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-312017-09-302017-06-302017-03-31
Value-5-3-2-1-5-4-5-7-8-6
Percentage of IncomeTaxExpenseBenefit8.3-2.8-2.5-1.1-3.8-3.5-2.0-2.9-6.8-4.8
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax-0.2-0.1-0.1-0.0-0.2-0.2-0.2-0.2-0.2-0.2
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:ReclassificationOutOfAccumulatedOtherComprehensiveIncome us-gaap:AccumulatedDefinedBenefitPlansAdjustmentNetPriorServiceCostCredit0.00.00.00.00.00.00.00.00.00.0

Income Taxes Paid Net

Profit Loss

Comprehensive Income Net Of Tax

Comprehensive Income Net Of Tax Attributable To Noncontrolling Interest

Comprehensive Income Net Of Tax Including Portion Attributable To Noncontrolling Interest

us-gaap:ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest



Period End2020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-312017-09-302017-06-302017-03-312016-09-302016-06-302016-03-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-312012-09-302012-06-302012-03-312011-09-302011-06-302011-03-312010-09-302010-06-302010-03-31
Value56387307315-4702861313384162206373-1077336370159206-29230157195194-20217240317228550625666204276165
Percentage of ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax2.113.212.511.2-15.710.945.410.34.95.89.5-31.78.79.04.65.3-8.47.71.64.74.8-5.84.60.00.00.00.00.00.00.00.00.0

Net Income Loss

us-gaap:NetIncomeLoss



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312009-09-302009-06-302009-03-31
Value74-111391312320138-4582991369-2499396174205-5796380-1089328-226395187222-30633364208142218-164196-1484251873069851118150185179265155239234414119
Percentage of NetIncomeLoss100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax2.8-4.213.412.711.45.1-15.311.447.3-93.210.75.35.8-171.79.7-32.08.5-6.49.65.45.7-8.88.61.85.03.95.4-4.75.30.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:ReclassificationOutOfAccumulatedOtherComprehensiveIncome, us-gaap:StatementEquityComponents

us-gaap:ReclassificationOutOfAccumulatedOtherComprehensiveIncome, us-gaap:AccumulatedDefinedBenefitPlansAdjustmentNetPriorServiceCostCredit



Period End2020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-312017-09-302017-06-302017-03-31
Value-18-4-5-6-13-15-13-12-10-12
Percentage of NetIncomeLoss-24.3-1.0-1.6-1.92.8-5.0-0.9-3.0-5.7-5.9
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax-0.7-0.1-0.2-0.2-0.4-0.6-0.4-0.3-0.3-0.3
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:ReclassificationOutOfAccumulatedOtherComprehensiveIncome us-gaap:AccumulatedDefinedBenefitPlansAdjustmentNetPriorServiceCostCredit0.00.00.00.00.00.00.00.00.00.0

us-gaap:ReclassificationOutOfAccumulatedOtherComprehensiveIncome, us-gaap:AccumulatedGainLossNetCashFlowHedgeParent



Period End2020-03-312019-03-31
Value0.01000000.0
Percentage of NetIncomeLoss0.00.3
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax0.00.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:ReclassificationOutOfAccumulatedOtherComprehensiveIncome us-gaap:AccumulatedGainLossNetCashFlowHedgeParent0.00.0

us-gaap:StatementEquityComponents

us-gaap:RetainedEarnings



Period End2020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-31
Value74391312320-4582991369
Percentage of NetIncomeLoss100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax2.813.412.711.4-15.311.447.3
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:RetainedEarnings0.00.00.00.00.00.00.0

Net Income Loss Available To Common Stockholders Basic

us-gaap:NetIncomeLossAvailableToCommonStockholdersBasic



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value74-111391308315128-5121341213-2499396174205
Percentage of NetIncomeLossAvailableToCommonStockholdersBasic100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax2.8-4.213.412.611.24.7-17.15.141.9-93.210.75.35.8

Net Income Loss Available To Common Stockholders Diluted

Net Income Loss Attributable To Noncontrolling Interest

Assets

us-gaap:Assets



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312008-12-31
Value42090423014150640884404904006339443389713879542257436494332743212431485196151401526955218752663530055252152166512245138851228504245038350157504245040648738480484769147326466614759647866348053470834466340783430433521
Percentage of Assets100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ConsolidationItems

us-gaap:CorporateNonSegment



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-09-302017-06-302017-03-312016-09-302016-06-302016-03-312015-09-30
Value695101579057458896989610501255613638637486175531830
Percentage of Assets1.72.41.91.41.52.42.32.73.21.41.51.50.90.31.01.6
Percentage of Assets1.72.41.91.41.52.42.32.73.21.41.51.50.90.31.01.6
Percentage of Assets us-gaap:CorporateNonSegment100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:MaterialReconcilingItems



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-09-302017-06-302017-03-312016-09-302016-06-302016-03-312015-09-30
Value03333000003550000000
Percentage of Assets0.00.10.10.00.00.00.00.00.90.00.00.00.00.00.00.0
Percentage of Assets0.00.10.10.00.00.00.00.00.90.00.00.00.00.00.00.0
Percentage of Assets us-gaap:MaterialReconcilingItems0.0100.0100.00.00.00.00.00.0100.00.00.00.00.00.00.00.0

us-gaap:ConsolidationItems, us-gaap:StatementBusinessSegments

us-gaap:OperatingSegments, fe:RegulatedDistribution



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-09-302017-06-302017-03-312016-09-302016-06-302016-03-312015-09-30
Value29642296422942829240289922869028530280882750427866276602782628276274482744727883
Percentage of Assets70.470.170.971.571.671.672.372.170.963.863.864.454.453.452.152.9
Percentage of Assets70.470.170.971.571.671.672.372.170.963.863.864.454.453.452.152.9
Percentage of Assets us-gaap:OperatingSegments fe:RegulatedDistribution100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OperatingSegments, fe:RegulatedTransmission



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-09-302017-06-302017-03-312016-09-302016-06-302016-03-312015-09-30
Value11753116111125511070109101040410017983396819356914289388034831481396988
Percentage of Assets27.927.427.127.126.926.025.425.225.021.421.120.715.516.215.413.3
Percentage of Assets27.927.427.127.126.926.025.425.225.021.421.120.715.516.215.413.3
Percentage of Assets us-gaap:OperatingSegments fe:RegulatedTransmission100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Liabilities And Stockholders Equity

us-gaap:LiabilitiesAndStockholdersEquity



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312009-12-31
Value420904230141506408844049040063394433897138795422574364943327432124314851961514015269552187526635300552521521665122451388512285042450383501575042450406487384804847691473264666147596478663480534304
Percentage of LiabilitiesAndStockholdersEquity100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Stockholders Equity

us-gaap:StockholdersEquity



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312009-12-31
Value68146975727272696932681468737699737539256406632061396241115031140712463124211262712530123481242012702126831260212692125441279912996130841343313497133231328013046129981272985458559
Percentage of StockholdersEquity100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets16.216.517.517.817.117.017.419.819.09.314.714.614.214.522.122.223.723.824.023.623.523.824.824.724.625.224.925.525.826.027.628.127.928.128.027.326.624.625.0

us-gaap:StatementClassOfStock

us-gaap:ConvertiblePreferredStock



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312016-12-312015-12-31
Value00021217170162162000
Percentage of StockholdersEquity0.00.00.00.30.31.01.02.12.20.00.00.0
Percentage of Assets0.00.00.00.10.10.20.20.40.40.00.00.0
Percentage of Assets us-gaap:ConvertiblePreferredStock0.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:StatementEquityComponents

us-gaap:AccumulatedDefinedBenefitPlansAdjustment



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302017-12-312016-12-312015-12-312014-12-31
Value112937414652738797150186258
Percentage of StockholdersEquity0.20.40.50.60.70.81.11.12.52.41.52.1
Percentage of Assets0.00.10.10.10.10.10.20.20.20.30.40.5
Percentage of Assets us-gaap:AccumulatedDefinedBenefitPlansAdjustment0.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:AccumulatedGainLossNetCashFlowHedgeParent



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312017-12-312016-12-31
Value-9-9-10-10-10-11-22-28
Percentage of StockholdersEquity-0.1-0.1-0.1-0.1-0.1-0.2-0.6-0.4
Percentage of Assets-0.0-0.0-0.0-0.0-0.0-0.0-0.1-0.1
Percentage of Assets us-gaap:AccumulatedGainLossNetCashFlowHedgeParent0.00.00.00.00.00.00.00.0

us-gaap:AccumulatedOtherComprehensiveIncome



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-312010-12-312009-12-312008-12-312007-12-31
Value22027313641617386142174171246284385426-1539-1415-1380-50
Percentage of StockholdersEquity0.00.30.40.40.50.60.90.91.23.62.81.42.02.22.93.2-18.0-16.50.00.0
Percentage of Assets0.00.00.10.10.10.10.20.20.20.30.40.30.50.60.80.9-4.4-4.1-4.10.0
Percentage of Assets us-gaap:AccumulatedOtherComprehensiveIncome0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:AdditionalPaidInCapital



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-312010-12-312009-12-312008-12-312007-12-31
Value1065110868110471141111381115301170811975119371000110555995298479776976997655444544854735509
Percentage of StockholdersEquity156.3155.8151.9157.0164.2169.2170.3155.5161.9254.8169.180.179.377.074.773.563.763.70.00.0
Percentage of Assets25.325.726.627.928.128.829.730.730.823.724.519.118.919.419.420.615.615.916.30.0
Percentage of Assets us-gaap:AdditionalPaidInCapital0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:CommonStock



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-312010-12-312009-12-312008-12-312007-12-31
Value5454545353515148484444424242424231313131
Percentage of StockholdersEquity0.80.80.70.70.80.70.70.60.71.10.70.30.30.30.30.30.40.40.00.0
Percentage of Assets0.10.10.10.10.10.10.10.10.10.10.10.10.10.10.10.10.10.10.10.0
Percentage of Assets us-gaap:CommonStock0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:RetainedEarnings



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-312010-12-312009-12-312008-12-312007-12-31
Value-3893-3967-3856-4247-4559-4879-5017-4559-4858-6262-4532225622852590288830474609449541593487
Percentage of StockholdersEquity-57.1-56.9-53.0-58.4-65.8-71.6-73.0-59.2-65.9-159.5-72.618.218.420.422.122.953.952.50.00.0
Percentage of Assets-9.2-9.4-9.3-10.4-11.3-12.2-12.7-11.7-12.5-14.8-10.54.34.45.15.76.413.213.112.40.0
Percentage of Assets us-gaap:RetainedEarnings0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

Assets Current

us-gaap:AssetsCurrent



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312009-12-31
Value200324442616238623142392259623632310310829312755276029503480307632303040383341134011387637854183457738873559356034993768370936083477335535914118464636983320
Percentage of AssetsCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets4.85.86.35.85.76.06.66.16.07.46.76.46.46.86.76.06.15.87.37.87.67.47.48.18.97.77.17.16.97.57.67.57.37.17.78.79.710.69.7

Cash And Cash Equivalents At Carrying Value

us-gaap:CashAndCashEquivalentsAtCarryingValue



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312008-12-312007-12-31
Value15262771642217436743625624858939911416419955119914613186949085109761092182227167172150947420229147611011019632281310874545129
Percentage of CashAndCashEquivalentsAtCarryingValue100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets0.41.51.71.00.40.91.10.70.61.40.90.30.40.51.10.40.30.30.20.20.20.20.20.10.20.40.40.10.10.30.30.20.20.40.61.02.32.91.80.80.92.51.60.0

Accounts Receivable Net Current

us-gaap:AccountsNotesLoansAndFinancingReceivableByReceivableType

us-gaap:AccountsReceivableNetCurrent

fe:Customer



Period End2020-03-312019-12-31
Value10091091
Percentage of AccountsReceivableNetCurrent100.0100.0
Percentage of Assets2.42.6
Percentage of Assets fe:Customer0.00.0

us-gaap:RelatedPartyTransactionsByRelatedParty

srt:AffiliatedEntity



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312017-12-31
Value00000200
Percentage of AccountsReceivableNetCurrent0.00.00.00.00.00.00.0
Percentage of Assets0.00.00.00.00.00.00.0
Percentage of Assets srt:AffiliatedEntity0.00.00.00.00.00.00.0

Inventory Net

us-gaap:InventoryNet



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312009-12-31
Value285281258261268252240281273463543553531564699759781785738792762817771802740752731806835861875921927811822866852638647
Percentage of InventoryNet100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets0.70.70.60.60.70.60.60.70.71.11.21.31.21.31.31.51.51.51.41.51.51.61.51.61.41.51.51.61.71.71.81.91.91.71.81.81.81.81.9

Other Assets Current

us-gaap:OtherAssetsCurrent



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312009-12-31
Value279157239280314175236263254151143151147158156163155167171166157160173205199241262248214176190171182122189203210274154
Percentage of OtherAssetsCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets0.70.40.60.70.80.40.60.70.70.40.30.30.30.40.30.30.30.30.30.30.30.30.30.40.40.50.50.50.40.30.40.40.40.30.40.40.40.80.4

Property Plant And Equipment Gross

Accumulated Depreciation Depletion And Amortization Property Plant And Equipment

us-gaap:AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312009-12-31
Value116351142711234111391096110793104681046310267119251608615999157691573115450152951542115160149171472814508141501404013797135551328013167130271282312600124341233612086118391180311593113451118011397
Percentage of AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets27.627.027.127.227.126.926.526.826.528.236.936.936.536.529.729.829.329.028.327.827.627.127.426.826.526.326.126.025.425.025.525.725.325.025.324.423.732.133.2

Property Plant And Equipment Net

us-gaap:PropertyPlantAndEquipmentNet



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312009-12-31
Value320053165031152306783026629911294072902128570288792949829179287952938737833374613764437214366103641636117357833492534516338883325233223330913328632903314413076830566303372926729942296351978819164
Percentage of PropertyPlantAndEquipmentNet100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets76.074.875.175.074.774.774.674.573.668.367.667.366.668.172.872.971.471.369.568.768.868.668.267.266.265.965.966.066.065.364.564.064.164.162.762.961.956.955.9

Long Term Investments

us-gaap:LongTermInvestments



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312009-12-31
Value143814511425140313591299132913131303318431433095309030263035298328862788315432343258322232593260316131043105310032153194345135183482352231323156308130023023
Percentage of LongTermInvestments100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets3.43.43.43.43.43.23.43.43.47.57.27.17.27.05.85.85.55.36.06.16.26.26.46.36.26.26.26.26.46.37.17.37.37.46.76.66.48.68.8

Investments In Affiliates Subsidiaries Associates And Joint Ventures

Goodwill

us-gaap:Goodwill



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312011-02-252010-12-312010-09-302010-06-302010-03-312009-12-312008-12-312007-12-31
Value56185618561856185618561856185618561856185618561856185618561856186418641864186418641864186418641864186418641864476447644764446444644464416448645665279525575557555755575557555755607
Percentage of Goodwill100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets13.313.313.513.713.914.014.214.414.513.312.913.013.013.010.810.912.212.312.212.112.212.312.512.512.512.712.712.912.812.813.213.413.513.613.813.613.60.016.016.116.216.416.316.60.0

us-gaap:ConsolidationItems, us-gaap:StatementBusinessSegments

us-gaap:OperatingSegments, fe:RegulatedDistribution



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-09-302017-06-302017-03-312016-09-302016-06-302016-03-312015-09-30
Value5004500450045004500450045004500450045004500450045092500450045092
Percentage of Goodwill89.189.189.189.189.189.189.189.189.189.189.189.190.689.178.079.3
Percentage of Assets11.911.812.112.212.412.512.712.812.911.511.511.69.89.79.59.7
Percentage of Assets us-gaap:OperatingSegments fe:RegulatedDistribution16.916.917.017.117.317.417.517.818.218.018.118.018.018.218.218.3

us-gaap:OperatingSegments, fe:RegulatedTransmission



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-09-302017-06-302017-03-312016-09-302016-06-302016-03-312015-09-30
Value614614614614614614614614614614614614526614614526
Percentage of Goodwill10.910.910.910.910.910.910.910.910.910.910.910.99.410.99.68.2
Percentage of Assets1.51.51.51.51.51.51.61.61.61.41.41.41.01.21.21.0
Percentage of Assets us-gaap:OperatingSegments fe:RegulatedTransmission5.25.35.55.55.65.96.16.26.36.66.76.96.57.47.57.5

Intangible Assets Net Excluding Goodwill

Finite Lived Intangible Assets Net

Deferred Tax Assets Liabilities Net

Other Assets Noncurrent

us-gaap:OtherAssetsNoncurrent



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312009-12-31
Value93510396187058317524135725921053742871102811539071076123813791218130113451456116912791386167416981638166517191580158817161641751769818794666
Percentage of OtherAssetsNoncurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets2.22.51.51.72.11.91.01.51.52.51.72.02.42.71.72.12.32.62.32.52.62.82.32.52.73.33.43.33.33.43.23.33.63.51.61.61.72.31.9

Liabilities Current

us-gaap:LiabilitiesCurrent



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312009-12-31
Value369748624239398343244634580050685065407742554647765771267043675963895602587667896262556159796173773776377955753371327605592060825773485548635544516246985188
Percentage of LiabilitiesCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets8.811.510.29.710.711.614.713.013.19.69.710.717.716.513.613.112.110.711.212.811.910.711.712.015.115.115.815.014.115.112.112.712.110.310.411.610.813.515.1

Long Term Debt Current

Accounts Payable Current

us-gaap:AccountsPayableCurrent



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312009-12-31
Value898918893810892965997909100510279249329771043944938100010759941034110212791190134114551250995950982159992510529181174100911221080872829
Percentage of AccountsPayableCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets2.12.22.22.02.22.42.52.32.62.42.12.22.32.41.81.81.92.11.92.02.12.52.32.62.82.52.01.91.93.21.92.21.92.52.22.42.32.52.4

us-gaap:RelatedPartyTransactionsByRelatedParty

srt:AffiliatedEntity



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302017-12-31
Value08746253001070
Percentage of AccountsPayableCurrent0.09.55.23.13.40.010.70.0
Percentage of Assets0.00.20.10.10.10.00.30.0
Percentage of Assets srt:AffiliatedEntity0.00.00.00.00.00.00.00.0

Accrued Income Taxes Current

us-gaap:AccruedIncomeTaxesCurrent



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312009-12-31
Value566545537416562533529508530571520518555580537439513519508467503490489397527485401338392543508436442558482399412326314
Percentage of AccruedIncomeTaxesCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets1.31.31.31.01.41.31.31.31.41.41.21.21.31.31.00.91.01.01.00.91.00.91.00.81.01.00.80.70.81.11.00.90.91.21.00.80.90.90.9

Other Liabilities Current

us-gaap:OtherLiabilitiesCurrent



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312009-12-31
Value57214251084840105110261012557882722867619848660915687970694824605908693850612863621872599946103894261710099009806911062733711
Percentage of OtherLiabilitiesCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets1.43.42.62.12.62.62.61.42.31.72.01.42.01.51.81.31.81.31.61.11.71.31.71.21.71.21.71.21.92.11.91.32.11.92.11.52.22.12.1

Liabilities Noncurrent

us-gaap:LiabilitiesNoncurrent



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312009-12-31
Value10758108461057310579104201086410162974396151314011899117781165411589148831488714964149711506615115147791500714010141151408214261145901437214478145291374213295130521345612559126111248090158551
Percentage of LiabilitiesNoncurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets25.625.625.525.925.727.125.825.024.831.127.327.227.026.928.629.028.428.728.628.528.128.827.427.527.528.329.028.728.728.828.227.727.428.426.926.526.125.924.9

Long Term Debt

us-gaap:ConsolidatedEntities, us-gaap:StatementBusinessSegments

us-gaap:LongTermDebt

srt:ParentCompany, fe:OtherBusinessOperations



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-31
Value790071007100710072007100
Percentage of LongTermDebt100.0100.0100.0100.0100.0100.0
Percentage of Assets18.816.817.117.417.817.7
Percentage of Assets srt:ParentCompany fe:OtherBusinessOperations0.00.00.00.00.00.0

us-gaap:FairValueByMeasurementBasis

us-gaap:CarryingReportedAmountFairValueDisclosure



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-31
Value2129720074198801950819088183151779617650179492226122218226461992119885197451966420217202442011819728197751982819757192581803417049
Percentage of LongTermDebt269.6282.7280.0274.8265.1258.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0
Percentage of Assets50.647.547.947.747.145.745.145.346.352.750.952.346.146.138.038.338.438.838.237.237.738.038.637.535.233.8
Percentage of Assets us-gaap:CarryingReportedAmountFairValueDisclosure0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:EstimateOfFairValueFairValueDisclosure



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-31
Value2357622928229102189020691192661876118876194872303822994231642002919829214652162721821215192152521195219112173321363208161932117957
Percentage of LongTermDebt298.4322.9322.7308.3287.4271.40.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0
Percentage of Assets56.054.255.253.551.148.147.648.450.254.552.753.546.446.041.342.141.441.240.940.041.741.741.740.537.735.6
Percentage of Assets us-gaap:EstimateOfFairValueFairValueDisclosure0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

Deferred Tax Liabilities Noncurrent

Pension And Other Postretirement Defined Benefit Plans Liabilities Noncurrent

us-gaap:PensionAndOtherPostretirementDefinedBenefitPlansLiabilitiesNoncurrent



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312009-12-31
Value345530652403241424172906274227172717397538143784375637194080417741354245386138363817393227542732271326893104308830703080227122572240282320452134231318681534
Percentage of PensionAndOtherPostretirementDefinedBenefitPlansLiabilitiesNoncurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets8.27.25.85.96.07.37.07.07.09.48.78.78.78.67.98.17.88.17.37.27.37.55.45.35.35.36.26.26.16.14.74.74.76.04.44.54.85.44.5

Minority Interest

Other Liabilities Noncurrent

us-gaap:OtherLiabilitiesNoncurrent



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312009-12-31
Value135716671755190919022057159111651057171814351584160617041269141914301555119113731332159012581494153217781716170317511836190419802011207221272208233512191226
Percentage of OtherLiabilitiesNoncurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets3.23.94.24.74.75.14.03.02.74.13.33.73.73.92.42.82.73.02.32.62.53.02.52.93.03.53.43.43.53.63.94.14.24.44.64.64.93.53.6

Stockholders Equity

us-gaap:StockholdersEquity



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312009-12-31
Value68146975727272696932681468737699737539256406632061396241115031140712463124211262712530123481242012702126831260212692125441279912996130841343313497133231328013046129981272985458559
Percentage of StockholdersEquity100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets16.216.517.517.817.117.017.419.819.09.314.714.614.214.522.122.223.723.824.023.623.523.824.824.724.625.224.925.525.826.027.628.127.928.128.027.326.624.625.0

us-gaap:StatementClassOfStock

us-gaap:ConvertiblePreferredStock



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312016-12-312015-12-31
Value00021217170162162000
Percentage of StockholdersEquity0.00.00.00.30.31.01.02.12.20.00.00.0
Percentage of Assets0.00.00.00.10.10.20.20.40.40.00.00.0
Percentage of Assets us-gaap:ConvertiblePreferredStock0.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:StatementEquityComponents

us-gaap:AccumulatedDefinedBenefitPlansAdjustment



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302017-12-312016-12-312015-12-312014-12-31
Value112937414652738797150186258
Percentage of StockholdersEquity0.20.40.50.60.70.81.11.12.52.41.52.1
Percentage of Assets0.00.10.10.10.10.10.20.20.20.30.40.5
Percentage of Assets us-gaap:AccumulatedDefinedBenefitPlansAdjustment0.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:AccumulatedGainLossNetCashFlowHedgeParent



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312017-12-312016-12-31
Value-9-9-10-10-10-11-22-28
Percentage of StockholdersEquity-0.1-0.1-0.1-0.1-0.1-0.2-0.6-0.4
Percentage of Assets-0.0-0.0-0.0-0.0-0.0-0.0-0.1-0.1
Percentage of Assets us-gaap:AccumulatedGainLossNetCashFlowHedgeParent0.00.00.00.00.00.00.00.0

us-gaap:AccumulatedOtherComprehensiveIncome



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-312010-12-312009-12-312008-12-312007-12-31
Value22027313641617386142174171246284385426-1539-1415-1380-50
Percentage of StockholdersEquity0.00.30.40.40.50.60.90.91.23.62.81.42.02.22.93.2-18.0-16.50.00.0
Percentage of Assets0.00.00.10.10.10.10.20.20.20.30.40.30.50.60.80.9-4.4-4.1-4.10.0
Percentage of Assets us-gaap:AccumulatedOtherComprehensiveIncome0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:AdditionalPaidInCapital



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-312010-12-312009-12-312008-12-312007-12-31
Value1065110868110471141111381115301170811975119371000110555995298479776976997655444544854735509
Percentage of StockholdersEquity156.3155.8151.9157.0164.2169.2170.3155.5161.9254.8169.180.179.377.074.773.563.763.70.00.0
Percentage of Assets25.325.726.627.928.128.829.730.730.823.724.519.118.919.419.420.615.615.916.30.0
Percentage of Assets us-gaap:AdditionalPaidInCapital0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:CommonStock



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-312010-12-312009-12-312008-12-312007-12-31
Value5454545353515148484444424242424231313131
Percentage of StockholdersEquity0.80.80.70.70.80.70.70.60.71.10.70.30.30.30.30.30.40.40.00.0
Percentage of Assets0.10.10.10.10.10.10.10.10.10.10.10.10.10.10.10.10.10.10.10.0
Percentage of Assets us-gaap:CommonStock0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:RetainedEarnings



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-312010-12-312009-12-312008-12-312007-12-31
Value-3893-3967-3856-4247-4559-4879-5017-4559-4858-6262-4532225622852590288830474609449541593487
Percentage of StockholdersEquity-57.1-56.9-53.0-58.4-65.8-71.6-73.0-59.2-65.9-159.5-72.618.218.420.422.122.953.952.50.00.0
Percentage of Assets-9.2-9.4-9.3-10.4-11.3-12.2-12.7-11.7-12.5-14.8-10.54.34.45.15.76.413.213.112.40.0
Percentage of Assets us-gaap:RetainedEarnings0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

Common Stock Value

Retained Earnings Accumulated Deficit

us-gaap:RetainedEarningsAccumulatedDeficit



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312009-12-31
Value-3893-3967-3856-4247-4559-4900-5017-4559-4858-6262-3763-4159-4333-45321264119022792256248223912205228525922560249625902448269028542888326633103122304746584607442646094495
Percentage of RetainedEarningsAccumulatedDeficit100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets-9.2-9.4-9.3-10.4-11.3-12.2-12.7-11.7-12.5-14.8-8.6-9.6-10.0-10.52.42.34.34.34.74.54.24.45.15.04.95.14.95.45.75.76.76.96.56.410.09.79.213.213.1

Accumulated Other Comprehensive Income Loss Net Of Tax

us-gaap:AccumulatedOtherComprehensiveIncomeLossNetOfTax



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312009-12-31
Value22027313641617386142151163175174184191179171177202230246232264271284299323361385367389405426-1436-1433-1518-1539-1415
Percentage of AccumulatedOtherComprehensiveIncomeLossNetOfTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets0.00.00.10.10.10.10.20.20.20.30.30.40.40.40.40.40.30.30.30.40.40.50.50.50.50.60.60.60.70.80.80.80.80.9-3.1-3.0-3.2-4.4-4.1

Net Cash Provided By Used In Operating Activities

us-gaap:NetCashProvidedByUsedInOperatingActivities



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312012-03-312011-06-302011-03-312010-06-302010-03-31
Value-5607301112807-182852846592-88010461280697785791112082263811301327797193-413540491352506
Percentage of NetCashProvidedByUsedInOperatingActivities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax-21.327.338.033.0-6.531.428.322.5-30.439.034.521.122.123.428.624.216.531.932.223.05.00.00.00.00.00.0

Net Cash Provided By Used In Investing Activities

us-gaap:NetCashProvidedByUsedInInvestingActivities



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312012-03-312011-06-302011-03-312010-06-302010-03-31
Value-659-792-745-706-630-781-672-422-1143-535-670-749-762-805-709-902-865-835-594-945-748-534-676141-491-476
Percentage of NetCashProvidedByUsedInInvestingActivities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax-25.1-29.6-25.5-28.8-22.5-28.8-22.5-16.1-39.5-20.0-18.0-22.6-21.5-23.9-18.1-26.5-22.4-23.6-14.4-27.3-19.20.00.00.00.00.0

Net Cash Provided By Used In Financing Activities

us-gaap:NetCashProvidedByUsedInFinancingActivities



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312012-03-312011-06-302011-03-312010-06-302010-03-31
Value725-9-91163593-129-11-1451679-321-3252-58-338-59133242-250-741152560819-489-550110-594
Percentage of NetCashProvidedByUsedInFinancingActivities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax27.6-0.3-3.16.721.1-4.8-0.4-5.558.1-12.0-8.80.1-1.6-10.0-1.53.96.3-7.1-18.04.414.40.00.00.00.00.0

Net Cash Provided By Used In Operating Activities

us-gaap:NetCashProvidedByUsedInOperatingActivities



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312012-03-312011-06-302011-03-312010-06-302010-03-31
Value-5607301112807-182852846592-88010461280697785791112082263811301327797193-413540491352506
Percentage of NetCashProvidedByUsedInOperatingActivities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax-21.327.338.033.0-6.531.428.322.5-30.439.034.521.122.123.428.624.216.531.932.223.05.00.00.00.00.00.0

Net Income Loss

us-gaap:NetIncomeLoss



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312009-09-302009-06-302009-03-31
Value74-111391312320138-4582991369-2499396174205-5796380-1089328-226395187222-30633364208142218-164196-1484251873069851118150185179265155239234414119
Percentage of NetIncomeLoss100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax2.8-4.213.412.711.45.1-15.311.447.3-93.210.75.35.8-171.79.7-32.08.5-6.49.65.45.7-8.88.61.85.03.95.4-4.75.30.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:ReclassificationOutOfAccumulatedOtherComprehensiveIncome, us-gaap:StatementEquityComponents

us-gaap:ReclassificationOutOfAccumulatedOtherComprehensiveIncome, us-gaap:AccumulatedDefinedBenefitPlansAdjustmentNetPriorServiceCostCredit



Period End2020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-312017-09-302017-06-302017-03-31
Value-18-4-5-6-13-15-13-12-10-12
Percentage of NetIncomeLoss-24.3-1.0-1.6-1.92.8-5.0-0.9-3.0-5.7-5.9
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax-0.7-0.1-0.2-0.2-0.4-0.6-0.4-0.3-0.3-0.3
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:ReclassificationOutOfAccumulatedOtherComprehensiveIncome us-gaap:AccumulatedDefinedBenefitPlansAdjustmentNetPriorServiceCostCredit0.00.00.00.00.00.00.00.00.00.0

us-gaap:ReclassificationOutOfAccumulatedOtherComprehensiveIncome, us-gaap:AccumulatedGainLossNetCashFlowHedgeParent



Period End2020-03-312019-03-31
Value0.01000000.0
Percentage of NetIncomeLoss0.00.3
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax0.00.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:ReclassificationOutOfAccumulatedOtherComprehensiveIncome us-gaap:AccumulatedGainLossNetCashFlowHedgeParent0.00.0

us-gaap:StatementEquityComponents

us-gaap:RetainedEarnings



Period End2020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-31
Value74391312320-4582991369
Percentage of NetIncomeLoss100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax2.813.412.711.4-15.311.447.3
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:RetainedEarnings0.00.00.00.00.00.00.0

Profit Loss

Depreciation Depletion And Amortization

us-gaap:DepreciationDepletionAndAmortization



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-312012-09-302012-06-30
Value295148367357345381399324280452456400392557518467455453514444425632343322266628374352333347
Percentage of DepreciationDepletionAndAmortization100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Increase Decrease In Other Operating Capital Net

Increase Decrease In Inventories

Net Cash Provided By Used In Investing Activities

us-gaap:NetCashProvidedByUsedInInvestingActivities



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312012-03-312011-06-302011-03-312010-06-302010-03-31
Value-659-792-745-706-630-781-672-422-1143-535-670-749-762-805-709-902-865-835-594-945-748-534-676141-491-476
Percentage of NetCashProvidedByUsedInInvestingActivities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax-25.1-29.6-25.5-28.8-22.5-28.8-22.5-16.1-39.5-20.0-18.0-22.6-21.5-23.9-18.1-26.5-22.4-23.6-14.4-27.3-19.20.00.00.00.00.0

Net Cash Provided By Used In Financing Activities

us-gaap:NetCashProvidedByUsedInFinancingActivities



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312012-03-312011-06-302011-03-312010-06-302010-03-31
Value725-9-91163593-129-11-1451679-321-3252-58-338-59133242-250-741152560819-489-550110-594
Percentage of NetCashProvidedByUsedInFinancingActivities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax27.6-0.3-3.16.721.1-4.8-0.4-5.558.1-12.0-8.80.1-1.6-10.0-1.53.96.3-7.1-18.04.414.40.00.00.00.00.0

Proceeds From Issuance Of Long Term Debt

us-gaap:ProceedsFromIssuanceOfLongTermDebt



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-03-312012-03-312011-06-302011-03-31
Value200020015055014008501744500625550325025014555210022788420007506411670146718000286217
Percentage of ProceedsFromIssuanceOfLongTermDebt100.0100.0100.0100.0100.0100.0100.0100.00.0100.0100.0100.0100.0100.0100.00.00.0100.0100.0100.00.0100.0100.0100.0100.0100.00.0100.0100.0

us-gaap:FairValueByMeasurementBasis

us-gaap:CarryingReportedAmountFairValueDisclosure



Period End2020-03-312019-12-312019-09-30
Value2000200150
Percentage of ProceedsFromIssuanceOfLongTermDebt100.0100.0100.0

Repayments Of Long Term Debt

us-gaap:RepaymentsOfLongTermDebt



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-03-312012-03-312011-06-302011-03-312010-06-302010-03-31
Value778527129628330277751476580976524211131443655031984892444869713743648995616643359298109
Percentage of RepaymentsOfLongTermDebt100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of LongTermDebtAndCapitalLeaseObligations0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:FairValueByMeasurementBasis

us-gaap:CarryingReportedAmountFairValueDisclosure



Period End2020-03-312019-12-312019-09-30
Value778527
Percentage of RepaymentsOfLongTermDebt100.0100.0100.0
Percentage of LongTermDebtAndCapitalLeaseObligations0.00.00.0
Percentage of LongTermDebtAndCapitalLeaseObligations us-gaap:CarryingReportedAmountFairValueDisclosure0.00.00.0

Payments For Repurchase Of Common Stock

Repayments Of Long Term Debt

us-gaap:RepaymentsOfLongTermDebt



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-03-312012-03-312011-06-302011-03-312010-06-302010-03-31
Value778527129628330277751476580976524211131443655031984892444869713743648995616643359298109
Percentage of RepaymentsOfLongTermDebt100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of LongTermDebtAndCapitalLeaseObligations0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:FairValueByMeasurementBasis

us-gaap:CarryingReportedAmountFairValueDisclosure



Period End2020-03-312019-12-312019-09-30
Value778527
Percentage of RepaymentsOfLongTermDebt100.0100.0100.0
Percentage of LongTermDebtAndCapitalLeaseObligations0.00.00.0
Percentage of LongTermDebtAndCapitalLeaseObligations us-gaap:CarryingReportedAmountFairValueDisclosure0.00.00.0

Debt Instrument Interest Rate Stated Percentage

Effective Income Tax Rate Continuing Operations

us-gaap:EffectiveIncomeTaxRateContinuingOperations



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-312012-09-30
Value1.667-0.0149999999999999860.2160.1920.208-0.050999999999999990.2560.3010.587-1.4630.3760.4020.3810.3980.1070.394-0.023000000000000020.3640.3810.393-0.54899999999999990.3130.2890.2820.2690.2610.3720.421
Percentage of EffectiveIncomeTaxRateContinuingOperations100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Number

Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Weighted Average Exercise Price

Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Grants In Period

Share Based Compensation

Deferred Tax Liabilities

Unrecognized Tax Benefits

Deferred Tax Assets Valuation Allowance

Unrecognized Tax Benefits Increases Resulting From Current Period Tax Positions

Cash And Cash Equivalents Period Increase Decrease

Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents

us-gaap:CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312015-12-31
Value185679750474210429487324299643435171208260213
Percentage of CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

fe:AmortizationDeferralOfRegulatoryAsset



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-30
Value52-164433753867-107
Percentage of AmortizationDeferralOfRegulatoryAsset100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ConsolidationItems, us-gaap:StatementBusinessSegments

us-gaap:OperatingSegments, fe:RegulatedDistribution



Period End2020-03-312019-09-302019-06-302019-03-312018-09-302018-06-30
Value494234365-107
Percentage of AmortizationDeferralOfRegulatoryAsset94.297.791.960.097.0100.0

us-gaap:OperatingSegments, fe:RegulatedTransmission



Period End2020-03-312019-09-302019-06-302019-03-312018-09-302018-06-30
Value313220
Percentage of AmortizationDeferralOfRegulatoryAsset5.82.38.140.03.0-0.0

fe:AmountPaidtoSettleAgreementsandTaxSharingPaymentstoSubsidiaryDebtors



Period End2020-03-312019-03-31
Value9780
Percentage of AmountPaidtoSettleAgreementsandTaxSharingPaymentstoSubsidiaryDebtors100.00.0

fe:DebtandEquitySecuritiesRealizedGainLossSalesProceeds



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-30
Value131131204149153173261175191141269313
Percentage of DebtandEquitySecuritiesRealizedGainLossSalesProceeds100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

fe:DebtandEquitySecuritiesRealizedGains



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-30
Value47885710391942029
Percentage of DebtandEquitySecuritiesRealizedGains100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

fe:DebtandEquitySecuritiesRealizedLosses



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-30
Value513756147111631129
Percentage of DebtandEquitySecuritiesRealizedLosses100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DisposalGroupClassification, us-gaap:IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperations

fe:DeconsolidationSettlementConsiderationandServicesCredit

us-gaap:DiscontinuedOperationsDisposedOfByMeansOtherThanSale, fe:FESandFENOC



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value4-22-8-103314118300
Percentage of DeconsolidationSettlementConsiderationandServicesCredit100.0100.0100.0100.0100.0100.0100.00.00.0

us-gaap:RetirementPlanType

fe:DefinedBenefitPlanBenefitObligationOneTimeTerminationBenefit

us-gaap:PensionPlansDefinedBenefit



Period End2020-03-312019-03-31
Value-80
Percentage of DefinedBenefitPlanBenefitObligationOneTimeTerminationBenefit100.00.0

us-gaap:RetirementPlanType

fe:DefinedBenefitPlanNetPeriodicBenefitCostExcludingCapitalizedAmounts

us-gaap:OtherPostretirementBenefitPlansDefinedBenefit



Period End2020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-312017-09-30
Value1-10-10-10-15-21-21-14
Percentage of DefinedBenefitPlanNetPeriodicBenefitCostExcludingCapitalizedAmounts100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:PensionPlansDefinedBenefit



Period End2020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-312017-09-30
Value358-11-1465-18-1430
Percentage of DefinedBenefitPlanNetPeriodicBenefitCostExcludingCapitalizedAmounts35800.0110.0140.0-60.0-33.385.766.7-214.3

fe:DefinedBenefitPlanPlanAssetsPeriodIncreaseDecreaseIncludingDiscontinuedOperations



Period End2020-03-312019-03-31
Value4230
Percentage of DefinedBenefitPlanPlanAssetsPeriodIncreaseDecreaseIncludingDiscontinuedOperations100.00.0

us-gaap:DisposalGroupClassification, us-gaap:IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperations

fe:DisposalGroupIncludingDiscontinuedOperationFuelCosts

us-gaap:DiscontinuedOperationsDisposedOfByMeansOtherThanSale, fe:FESandFENOC



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value63550203535525116208237180164
Percentage of DisposalGroupIncludingDiscontinuedOperationFuelCosts100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DisposalGroupClassification, us-gaap:IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperations

fe:DisposalGroupIncludingDiscontinuedOperationGeneralTaxes

us-gaap:DiscontinuedOperationsDisposedOfByMeansOtherThanSale, fe:FESandFENOC



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value032543401829152329
Percentage of DisposalGroupIncludingDiscontinuedOperationGeneralTaxes0.0100.0100.0100.0100.0100.0100.00.0100.0100.0100.0100.0100.0

us-gaap:DisposalGroupClassification, us-gaap:IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperations

fe:DisposalGroupIncludingDiscontinuedOperationOtherOperatingExpenses

us-gaap:DiscontinuedOperationsDisposedOfByMeansOtherThanSale, fe:FESandFENOC



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value62116161021240347402290282492
Percentage of DisposalGroupIncludingDiscontinuedOperationOtherOperatingExpenses100.0100.0100.0100.0100.0100.0100.00.0100.0100.0100.0100.0100.0

fe:DisposalGroupIncludingDiscontinuedOperationWorthlessStockDeductionNetofTax



Period End2020-02-27
Value1000
Percentage of DisposalGroupIncludingDiscontinuedOperationWorthlessStockDeductionNetofTax100.0

us-gaap:IncomeTaxAuthority

us-gaap:StateAndLocalJurisdiction



Period End2020-02-27
Value83
Percentage of DisposalGroupIncludingDiscontinuedOperationWorthlessStockDeductionNetofTax8.3

us-gaap:Range, us-gaap:DerivativeInstrumentRisk, us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:ValuationTechnique

fe:FairValueInputsEnergy

srt:Maximum, fe:NonUtilityGenerationContract, us-gaap:FairValueInputsLevel3, fe:Model



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-31
Value109000.0-223000.0-223000.0-220000.0996000.0-223000.0
Percentage of FairValueInputsEnergy100.0100.0100.0100.0100.0100.0

srt:Minimum, fe:NonUtilityGenerationContract, us-gaap:FairValueInputsLevel3, fe:Model



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-31
Value400.00.00.00.0400.00.0
Percentage of FairValueInputsEnergy0.4-0.0-0.0-0.00.0-0.0

srt:WeightedAverage, fe:NonUtilityGenerationContract, us-gaap:FairValueInputsLevel3, fe:Model



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-31
Value27000.00.0-45000.0-45000.0205000.0-44000.0
Percentage of FairValueInputsEnergy24.8-0.020.220.520.619.7

us-gaap:Range, us-gaap:DerivativeInstrumentRisk, us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:ValuationTechnique

fe:FairValueInputsPowerRegionalPrices

srt:Maximum, fe:NonUtilityGenerationContract, us-gaap:FairValueInputsLevel3, fe:Model



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-31
Value34.76.900000000000002-5.8000000000000010.700000000000002833.40.8999999999999986
Percentage of FairValueInputsPowerRegionalPrices100.0100.0100.0100.0100.0100.0

srt:Minimum, fe:NonUtilityGenerationContract, us-gaap:FairValueInputsLevel3, fe:Model



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-31
Value20.5-0.8999999999999986-7.3000000000000012.699999999999999330.80.7999999999999972
Percentage of FairValueInputsPowerRegionalPrices59.1-13.0125.9385.792.288.9

srt:WeightedAverage, fe:NonUtilityGenerationContract, us-gaap:FairValueInputsLevel3, fe:Model



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-31
Value21.6-0.8999999999999986-6.5999999999999981.699999999999995732.11.0
Percentage of FairValueInputsPowerRegionalPrices62.2-13.0113.8242.996.1111.1

us-gaap:Range, us-gaap:DerivativeInstrumentRisk, us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:ValuationTechnique

fe:FairValueInputsRTOAuctionClearingPrices

srt:Maximum, fe:Ftrs, us-gaap:FairValueInputsLevel3, fe:Model



Period End2020-03-312019-12-312019-09-30
Value2.1-0.200000000000000180.8999999999999999
Percentage of FairValueInputsRTOAuctionClearingPrices100.0100.0100.0

srt:Minimum, fe:Ftrs, us-gaap:FairValueInputsLevel3, fe:Model



Period End2020-03-312019-12-312019-09-30
Value-0.10.099999999999999980.09999999999999998
Percentage of FairValueInputsRTOAuctionClearingPrices-4.8-50.011.1

srt:WeightedAverage, fe:Ftrs, us-gaap:FairValueInputsLevel3, fe:Model



Period End2020-03-312019-12-312019-09-30
Value0.50.100000000000000090.19999999999999996
Percentage of FairValueInputsRTOAuctionClearingPrices23.8-50.022.2

us-gaap:DerivativeInstrumentRisk, us-gaap:FairValueByFairValueHierarchyLevel

fe:FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetAndLiabilityPurchases

fe:Ftrs, us-gaap:FairValueInputsLevel3



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302017-12-312017-09-302016-12-312016-09-302015-12-312015-09-302014-12-312014-09-30
Value000200000011-12-1
Percentage of FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetAndLiabilityPurchases0.00.00.0100.00.00.00.00.00.00.0100.0100.0100.0100.0100.0

us-gaap:DerivativeInstrumentRisk, us-gaap:FairValueByFairValueHierarchyLevel

fe:FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetAndLiabilitySettlements

fe:Ftrs, us-gaap:FairValueInputsLevel3



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-03-31
Value40-2-1100-1131-1-442-2-70-50430711413
Percentage of FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetAndLiabilitySettlements100.00.0100.0100.0100.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0100.00.0100.0100.0100.0100.0100.0100.0100.0

fe:NonUtilityGenerationContract, us-gaap:FairValueInputsLevel3



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-03-31
Value-13-11-8-10-10-8-9-9-7-9-11-8-10-9-11-11-13-18-17-15-12-21-24-1610-23
Percentage of FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetAndLiabilitySettlements-325.00.0400.01000.0-100.00.0900.0-900.0-233.3-900.01100.0200.0-250.0-450.0550.0157.10.0360.00.0-375.0-40.0-300.0-218.2-400.01000.0-766.7

us-gaap:DerivativeInstrumentRisk, us-gaap:FairValueByFairValueHierarchyLevel

fe:FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetunrealizedgainloss

fe:Ftrs, us-gaap:FairValueInputsLevel3



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-31
Value0-1000160110002-800-8-2141414136
Percentage of FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetunrealizedgainloss0.0100.00.00.00.0100.0100.00.0100.0100.00.00.00.0100.0100.00.00.0100.0100.0100.0100.0100.0100.0100.0100.0

fe:NonUtilityGenerationContract, us-gaap:FairValueInputsLevel3



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-31
Value0000000000000200010010110
Percentage of FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetunrealizedgainloss0.0-0.00.00.00.00.00.00.00.00.00.00.00.0100.0-0.00.00.0-12.5-0.00.025.00.07.17.70.0

us-gaap:DerivativeInstrumentRisk, us-gaap:FairValueByFairValueHierarchyLevel

fe:FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisLiabilityUnrealizedGainLoss

fe:Ftrs, us-gaap:FairValueInputsLevel3



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-03-31
Value0-11001-20000115-201640-38-1-4-2-1
Percentage of FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisLiabilityUnrealizedGainLoss0.0100.0100.00.00.0100.0100.00.00.00.00.0100.0100.0100.0100.00.0100.0100.0100.00.0100.0100.0100.0100.0100.0100.0

fe:NonUtilityGenerationContract, us-gaap:FairValueInputsLevel3



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-03-31
Value33-3470-402-444606-112122071017111-27-18
Percentage of FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisLiabilityUnrealizedGainLoss0.0-300.0-300.00.00.00.0200.00.00.00.00.0400.0600.00.0-300.00.01200.0200.0500.00.0-333.3212.5-1100.0-25.01350.01800.0

us-gaap:DerivativeInstrumentRisk, us-gaap:FairValueByFairValueHierarchyLevel

fe:FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisUnrealizedGainLoss

fe:Ftrs, us-gaap:FairValueInputsLevel3



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-03-31
Value00-100080110-1-1-3-60-1-14-6176151781
Percentage of FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisUnrealizedGainLoss0.00.0100.00.00.00.0100.00.0100.0100.00.0100.0100.0100.0100.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

fe:NonUtilityGenerationContract, us-gaap:FairValueInputsLevel3



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-03-31
Value-3-33-4-7040-24-4-4-62-61-12-11-20-7-9-17-1002718
Percentage of FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisUnrealizedGainLoss0.00.0-300.00.00.00.050.00.0-200.0400.00.0400.0600.0-66.7100.00.01200.078.6333.3-700.0-128.6-283.3-66.70.0337.51800.0

us-gaap:DisposalGroupClassification, us-gaap:IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperations

fe:IncomeTaxExpenseBenefitfromDeconsolidationGainLossIncludingWorthlessStockDeduction

us-gaap:DiscontinuedOperationsDisposedOfByMeansOtherThanSale, fe:FESandFENOC



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value-36-53-1525-9-44-3490-919
Percentage of IncomeTaxExpenseBenefitfromDeconsolidationGainLossIncludingWorthlessStockDeduction100.0100.0100.0100.0100.0100.0100.00.0100.0

us-gaap:RetirementPlanType

fe:IncreaseDecreasetoNetPeriodicBenefitCostBasedonMarktoMarketAdjustment

us-gaap:OtherPostretirementBenefitPlansDefinedBenefit



Period End2020-03-312019-03-31
Value370
Percentage of IncreaseDecreasetoNetPeriodicBenefitCostBasedonMarktoMarketAdjustment100.00.0

us-gaap:PensionPlansDefinedBenefit



Period End2020-03-312019-03-31
Value3860
Percentage of IncreaseDecreasetoNetPeriodicBenefitCostBasedonMarktoMarketAdjustment1043.20.0

fe:InvestmentIncomeFromTrusts



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-312012-09-302012-06-302012-03-312011-09-302011-06-302011-03-312010-09-302010-06-30
Value581011910111010262425232527252326252525232424252622261818152028241916
Percentage of InvestmentIncomeFromTrusts100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

fe:ProposedActionReductioninPowerPlantsCarbonPollutionPercentage



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-09-302016-06-302016-03-31
Value0.90.00.00.00.90.00.00.00.90.00.00.00.90.00.00.9
Percentage of ProposedActionReductioninPowerPlantsCarbonPollutionPercentage100.00.00.00.0100.00.00.00.0100.00.00.00.0100.00.00.0100.0

us-gaap:ConsolidationItems

fe:TaxCutsandJobsActChangeinTaxRateRefundofRevenue

us-gaap:OperatingSegments



Period End2020-03-312019-06-302019-03-312018-09-302018-06-30
Value23232298
Percentage of TaxCutsandJobsActChangeinTaxRateRefundofRevenue100.0100.0100.0100.0100.0

us-gaap:AllowanceForDoubtfulAccountsReceivableRecoveries



Period End2020-03-31
Value14
Percentage of AllowanceForDoubtfulAccountsReceivableRecoveries100.0

us-gaap:AllowanceForDoubtfulAccountsReceivableWriteOffs



Period End2020-03-31
Value35
Percentage of AllowanceForDoubtfulAccountsReceivableWriteOffs100.0

us-gaap:AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareByAntidilutiveSecurities

us-gaap:AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount

us-gaap:EmployeeStockOption



Period End2020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-312017-09-302017-06-302017-03-31
Value0.00.00.00.01000000.01000000.01000000.01000000.01000000.01000000.0
Percentage of AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount0.00.00.00.0100.0100.0100.0100.0100.0100.0

us-gaap:CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-30
Value-494-71276264-219-58163
Percentage of CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect100.0100.0100.0100.0100.0100.0100.0

us-gaap:CommonStockDividendsPerShareDeclared



Period End2020-03-312019-11-082019-09-302019-07-312019-06-302019-03-312018-11-092018-12-312018-09-302018-09-302018-07-312018-06-302018-03-312018-03-312018-01-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-312012-09-302012-06-302012-03-312011-09-302011-06-302011-03-312010-09-302010-06-302010-03-31
Value0.390.390.380.380.00.380.380.38000000000000010.360.720.360.00.360.720.360.00.720.00.720.00.720.00.720.00.720.00.720.00.720.00.721.10.00.551.10.00.551.10.00.551.10.00.55
Percentage of CommonStockDividendsPerShareDeclared100.0100.0100.0100.00.0100.0100.0100.0100.0100.00.0100.0100.00.0100.00.0100.00.0100.00.0100.00.0100.00.0100.00.0100.00.0100.0100.00.0100.0100.00.0100.0100.00.0100.0100.00.0100.0

us-gaap:RelatedPartyTransaction, us-gaap:RelatedPartyTransactionsByRelatedParty, dei:LegalEntity

us-gaap:DebtorReorganizationItemsDischargeOfClaimsAndLiabilities

fe:ITAccessAgreement, srt:AffiliatedEntity, fe:Fes



Period End2020-02-18
Value125
Percentage of DebtorReorganizationItemsDischargeOfClaimsAndLiabilities100.0

us-gaap:DisposalGroupClassification, us-gaap:IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperations

us-gaap:DeconsolidationGainOrLossAmount

us-gaap:DiscontinuedOperationsDisposedOfByMeansOtherThanSale, fe:FESandFENOC



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value507523-15-2430-834012390000
Percentage of DeconsolidationGainOrLossAmount100.0100.0100.0100.0100.0100.0100.00.0100.00.00.00.00.0

us-gaap:DeferredIncomeTaxesAndTaxCredits



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-03-312012-03-312011-06-302011-03-312010-06-302010-03-31
Value-7818971912313549278386229110114-3381246-134206-14420992127-165168-2218113426538117110059
Percentage of DeferredIncomeTaxesAndTaxCredits100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:RetirementPlanType

us-gaap:DefinedBenefitPlanAmortizationOfPriorServiceCostCredit

us-gaap:OtherPostretirementBenefitPlansDefinedBenefit



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-30
Value-33-9-9-9-9-21-20-20-20-21-20-20-20-20-20-20
Percentage of DefinedBenefitPlanAmortizationOfPriorServiceCostCredit100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:PensionPlansDefinedBenefit



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-30
Value10122212221222222
Percentage of DefinedBenefitPlanAmortizationOfPriorServiceCostCredit-30.3-11.1-22.2-22.2-22.2-4.8-10.0-10.0-10.0-4.8-10.0-10.0-10.0-10.0-10.0-10.0

us-gaap:RetirementPlanType

us-gaap:DefinedBenefitPlanAssumptionsUsedCalculatingNetPeriodicBenefitCostDiscountRate

us-gaap:OtherPostretirementBenefitPlansDefinedBenefit



Period End2020-03-31
Value0.028
Percentage of DefinedBenefitPlanAssumptionsUsedCalculatingNetPeriodicBenefitCostDiscountRate100.0

us-gaap:PensionPlansDefinedBenefit



Period End2020-03-31
Value0.0296
Percentage of DefinedBenefitPlanAssumptionsUsedCalculatingNetPeriodicBenefitCostDiscountRate105.7

us-gaap:RetirementPlanType

us-gaap:DefinedBenefitPlanExpectedReturnOnPlanAssets

us-gaap:OtherPostretirementBenefitPlansDefinedBenefit



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-30
Value8877797788778778
Percentage of DefinedBenefitPlanExpectedReturnOnPlanAssets100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:PensionPlansDefinedBenefit



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-30
Value153135135135135142144144144112112112112102100100
Percentage of DefinedBenefitPlanExpectedReturnOnPlanAssets1912.51687.51928.61928.61928.61577.82057.12057.11800.01400.01600.01600.01400.01457.11428.61250.0

us-gaap:DefinedBenefitPlanFairValueOfPlanAssetsPeriodIncreaseDecrease



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-31
Value-423-674000-144000141000147000242000835000-256000609000507000
Percentage of DefinedBenefitPlanFairValueOfPlanAssetsPeriodIncreaseDecrease100.0100.00.00.00.0100.00.00.00.0100.00.00.00.0100.00.00.00.0100.00.00.00.0100.00.00.00.0100.00.00.00.0100.00.00.00.0100.00.00.00.0

us-gaap:RetirementPlanType

us-gaap:DefinedBenefitPlanInterestCost

us-gaap:OtherPostretirementBenefitPlansDefinedBenefit



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-30
Value4665576666777878
Percentage of DefinedBenefitPlanInterestCost100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:PensionPlansDefinedBenefit



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-30
Value759493939393939393999797971009999
Percentage of DefinedBenefitPlanInterestCost1875.01566.71550.01860.01860.01328.61550.01550.01550.01650.01385.71385.71385.71250.01414.31237.5

us-gaap:DefinedBenefitPlanNetPeriodicBenefitCost



Period End2020-03-31
Value246
Percentage of DefinedBenefitPlanNetPeriodicBenefitCost100.0

us-gaap:RetirementPlanType

us-gaap:OtherPostretirementBenefitPlansDefinedBenefit



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-30
Value19-9-10-10-101-14-20-21-8-19-19-20-3-18-19
Percentage of DefinedBenefitPlanNetPeriodicBenefitCost0.40.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:PensionPlansDefinedBenefit



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-30
Value378665872324528771483939392264949
Percentage of DefinedBenefitPlanNetPeriodicBenefitCost153.70.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:RetirementPlanType

us-gaap:DefinedBenefitPlanServiceCost

us-gaap:OtherPostretirementBenefitPlansDefinedBenefit



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-30
Value1011121112111121
Percentage of DefinedBenefitPlanServiceCost100.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:PensionPlansDefinedBenefit



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-30
Value52494848485656565652525252474848
Percentage of DefinedBenefitPlanServiceCost5200.00.04800.04800.04800.02800.05600.05600.05600.02600.05200.05200.05200.04700.02400.04800.0

us-gaap:RetirementPlanType

us-gaap:DefinedBenefitPlanSpecialTerminationBenefits

us-gaap:OtherPostretirementBenefitPlansDefinedBenefit



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-30
Value0000014-60000
Percentage of DefinedBenefitPlanSpecialTerminationBenefits0.00.00.00.00.0100.0100.00.00.00.00.0

us-gaap:PensionPlansDefinedBenefit



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-30
Value02801-1552-210000
Percentage of DefinedBenefitPlanSpecialTerminationBenefits0.00.00.00.00.0371.4350.00.00.00.00.0

us-gaap:Depreciation



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-31
Value317310304309297293283299294293289281275339311334329313328322319316308302294293316302294287282292279283297287220
Percentage of Depreciation100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ConsolidationItems

us-gaap:CorporateNonSegment



Period End2020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-312017-09-302017-06-302017-03-312016-09-302016-06-302016-03-312015-09-30
Value20121191917191816171515
Percentage of Depreciation0.60.00.30.70.46.46.55.96.86.55.15.14.64.6

us-gaap:MaterialReconcilingItems



Period End2020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-312017-09-302017-06-302017-03-312016-09-302016-06-302016-03-312015-09-30
Value161817171618180000000
Percentage of Depreciation5.05.95.55.75.76.06.10.00.00.00.00.00.00.0

us-gaap:ConsolidationItems, us-gaap:StatementBusinessSegments

us-gaap:OperatingSegments, fe:RegulatedDistribution



Period End2020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-312017-09-302017-06-302017-03-312016-09-302016-06-302016-03-312015-09-30
Value223215220209202200196183179178171168167174
Percentage of Depreciation70.370.771.270.471.466.966.763.363.764.755.050.350.853.0

us-gaap:OperatingSegments, fe:RegulatedTransmission



Period End2020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-312017-09-302017-06-302017-03-312016-09-302016-06-302016-03-312015-09-30
Value7671716964626159545145464541
Percentage of Depreciation24.023.423.023.222.620.720.720.419.218.514.513.813.712.5

us-gaap:DisposalGroupClassification, us-gaap:IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperations

us-gaap:DiscontinuedOperationIncomeLossFromDiscontinuedOperationBeforeIncomeTax

us-gaap:DiscontinuedOperationsDisposedOfByMeansOtherThanSale, fe:FESandFENOC



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value0-3-403-4-162-18-2257132-60-78
Percentage of DiscontinuedOperationIncomeLossFromDiscontinuedOperationBeforeIncomeTax0.0100.0100.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DiscontinuedOperationTaxEffectOfDiscontinuedOperation



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312015-03-312014-12-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-312012-09-30
Value-36-5123952551-35430-8908213715-260000693422
Percentage of DiscontinuedOperationTaxEffectOfDiscontinuedOperation100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.00.00.00.0100.0100.0100.0100.0100.0

us-gaap:DisposalGroupClassification, us-gaap:IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperations

us-gaap:DiscontinuedOperationsDisposedOfByMeansOtherThanSale, fe:FESandFENOC



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value0217141470-5-3029-81937-15-26
Percentage of DiscontinuedOperationTaxEffectOfDiscontinuedOperation-0.0-3.9850.035.9280.02.71.4-100.0-3.3-99.8100.0-100.0100.0

us-gaap:DisposalGroupClassification, us-gaap:IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperations

us-gaap:DisposalGroupIncludingDiscontinuedOperationRevenue

us-gaap:DiscontinuedOperationsDisposedOfByMeansOtherThanSale, fe:FESandFENOC



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value741623154558311622756788680689
Percentage of DisposalGroupIncludingDiscontinuedOperationRevenue100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DividendsCommonStockCash



Period End2020-03-312019-09-302019-03-312018-09-302018-03-31
Value211411202368343
Percentage of DividendsCommonStockCash100.0100.0100.0100.0100.0

us-gaap:StatementEquityComponents

us-gaap:AdditionalPaidInCapital



Period End2020-03-312019-09-302019-03-312018-09-302018-03-31
Value211411202368343
Percentage of DividendsCommonStockCash100.0100.0100.0100.0100.0

us-gaap:DividendsPreferredStock



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value0000310190430000
Percentage of DividendsPreferredStock0.00.00.00.0100.0100.0100.00.0100.00.00.00.00.0

us-gaap:ExciseTaxesCollected



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-312012-09-302012-06-302012-03-312011-09-302011-06-302011-03-312010-09-30
Value92901008110293104871029710291100961119210796109961159910599117117107114123107121137116119120
Percentage of ExciseTaxesCollected100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DerivativeInstrumentRisk, us-gaap:FairValueByFairValueHierarchyLevel

us-gaap:FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetPurchases

fe:Ftrs, us-gaap:FairValueInputsLevel3



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302017-12-312017-09-302016-12-312016-09-302015-12-312015-09-302014-12-312014-09-30
Value0006000-11-120000
Percentage of FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetPurchases0.00.00.0100.00.00.00.0100.0100.0100.0100.00.00.00.00.0

us-gaap:DerivativeInstrumentRisk, us-gaap:FairValueByFairValueHierarchyLevel

us-gaap:FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetSettlements

fe:Ftrs, us-gaap:FairValueInputsLevel3



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-03-31
Value410010111310077-215147361016936
Percentage of FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetSettlements100.0100.00.00.0100.0100.0100.0100.0100.0100.00.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

fe:NonUtilityGenerationContract, us-gaap:FairValueInputsLevel3



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-03-31
Value000000000000111001011012172
Percentage of FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetSettlements0.00.00.00.00.00.00.00.00.00.00.00.014.314.3-50.00.00.0100.00.014.32.80.06.222.2566.733.3

us-gaap:DerivativeInstrumentRisk, us-gaap:FairValueByFairValueHierarchyLevel

us-gaap:FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisLiabilityPurchases

fe:Ftrs, us-gaap:FairValueInputsLevel3



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302017-12-312017-09-302016-12-312016-09-302015-12-312015-09-302014-12-312014-09-30
Value0004000-11-11-11-21
Percentage of FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisLiabilityPurchases0.00.00.0100.00.00.00.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DerivativeInstrumentRisk, us-gaap:FairValueByFairValueHierarchyLevel

us-gaap:FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisLiabilitySettlements

fe:Ftrs, us-gaap:FairValueInputsLevel3



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-03-31
Value01210120001435085643635523
Percentage of FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisLiabilitySettlements0.0100.0100.0100.00.0100.0100.00.00.00.0100.0100.0100.0100.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

fe:NonUtilityGenerationContract, us-gaap:FairValueInputsLevel3



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-03-31
Value13118101089979118111012111319171613212518725
Percentage of FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisLiabilitySettlements0.01100.0400.01000.00.0800.0450.00.00.00.01100.0200.0366.7200.00.0137.5260.0316.7425.0533.3216.7700.0500.0360.0350.0833.3

us-gaap:FuelCosts



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-312012-09-302012-06-302012-03-312011-09-302011-06-302011-03-312010-09-302010-06-302010-03-31
Value98115122129131134137177187309363343368397450438381477482383513569544550617657628630636656541632635453400350334
Percentage of FuelCosts100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:IncomeLossFromDiscontinuedOperationsNetOfTax



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-31
Value50702-29-24-44-845111239-143895-46000000008609445344
Percentage of IncomeLossFromDiscontinuedOperationsNetOfTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.00.00.00.00.00.00.00.0100.00.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DisposalGroupClassification, us-gaap:IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperations

us-gaap:DiscontinuedOperationsDisposedOfByMeansOtherThanSale, fe:FESandFENOC



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value0-5-21-14-11-74-1132-47-143895-45-52
Percentage of IncomeLossFromDiscontinuedOperationsNetOfTax0.0-7.1-1050.048.345.8168.21.3290.9-3.8100.0100.097.80.0

us-gaap:IncomeLossFromDiscontinuedOperationsNetOfTaxAttributableToReportingEntity



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value50702-29-35-44-845321192-143895-45-52
Percentage of IncomeLossFromDiscontinuedOperationsNetOfTaxAttributableToReportingEntity100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DisposalGroupClassification, us-gaap:IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperations

us-gaap:DiscontinuedOperationsDisposedOfByMeansOtherThanSale, fe:FESandFENOC



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value50702-29-35-44-845321192-143895-45-52
Percentage of IncomeLossFromDiscontinuedOperationsNetOfTaxAttributableToReportingEntity100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:IncomeLossFromDiscontinuedOperationsNetOfTaxPerBasicShare



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-31
Value0.090.130.01-0.05-0.07-0.09-1.680.062.51-3.230.21-0.1-0.120.00.00.00.00.00.00.00.210.00.020.010.010.010.010.010.01
Percentage of IncomeLossFromDiscontinuedOperationsNetOfTaxPerBasicShare100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.00.00.00.00.00.00.0100.00.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:IncomeLossFromDiscontinuedOperationsNetOfTaxPerDilutedShare



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-31
Value0.090.130.0-0.05-0.07-0.09-1.680.062.5-3.230.21-0.1-0.120.00.00.00.00.00.00.00.20.00.020.010.010.010.010.010.01
Percentage of IncomeLossFromDiscontinuedOperationsNetOfTaxPerDilutedShare100.0100.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.00.00.00.00.00.00.0100.00.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:IncreaseDecreaseInAccountsAndOtherReceivables



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-03-312012-03-312011-06-302011-03-312010-06-302010-03-31
Value-51-43-11-125-92-627412-3211210-15-68-23135-100-1-1771-10597-49-134-12416834-59-35-164158-2
Percentage of IncreaseDecreaseInAccountsAndOtherReceivables100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:IncreaseDecreaseInAccountsPayableTrade



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-03-312012-03-312011-06-302011-03-312010-06-302010-03-31
Value-665381-40-143-1675-469694-22-4545-205-472542-40-68-17789-150-97200-385-25662-9075-57
Percentage of IncreaseDecreaseInAccountsPayableTrade100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:IncreaseDecreaseInAccruedIncomeTaxesPayable



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-03-312012-03-312011-06-302011-03-312010-06-302010-03-31
Value-3711712-36-81125-6787-145152-9969-131142-130-11097-4557-80-201483-242-126-116116-182-657
Percentage of IncreaseDecreaseInAccruedIncomeTaxesPayable100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:IncreaseDecreaseInEmployeeRelatedLiabilities



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-03-312012-03-312011-06-302011-03-312010-06-302010-03-31
Value-61858-3-123565732-108277112-137275252-102-11492-8052-448-118-91-16262-1354-81
Percentage of IncreaseDecreaseInEmployeeRelatedLiabilities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:IncreaseDecreaseInInterestPayableNet



Period End2020-03-312019-03-312016-03-312015-12-312015-03-312014-12-312014-03-312013-03-312012-03-312011-06-302011-03-312010-06-302010-03-31
Value291347-4344-35465370-8076-5666
Percentage of IncreaseDecreaseInInterestPayableNet100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:IncreaseDecreaseInOtherCurrentLiabilities



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-31
Value1-5045-160-612-137-15768-7520390-2194924-91120-23242
Percentage of IncreaseDecreaseInOtherCurrentLiabilities100.0100.0100.0100.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-03-312012-03-31
Value125-79-40-39148-53-29-1144-71-8616111-55-63982-33-730116-84-62-92915919
Percentage of IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:IncrementalCommonSharesAttributableToShareBasedPaymentArrangements



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-312012-09-302012-06-302012-03-312011-09-302011-06-302011-03-312010-09-302010-06-302010-03-31
Value212130222-1211020211120111101222221112
Percentage of IncrementalCommonSharesAttributableToShareBasedPaymentArrangements100.0100.0100.0100.0100.00.0100.0100.0100.0100.0100.0100.0100.00.0100.00.0100.0100.0100.0100.0100.00.0100.0100.0100.0100.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:InterestCostsCapitalized



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-30
Value7777555441011111215171717121161418123-141822126-1719
Percentage of InterestCostsCapitalized100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:InterestCostsCapitalizedAdjustment



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-30
Value18181916181816161520192020242826252426
Percentage of InterestCostsCapitalizedAdjustment100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:MajorCustomers

us-gaap:LateFeeIncomeGeneratedByServicingFinancialAssetsAmount

fe:OtherNonCustomerRevenue



Period End2020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-31
Value1099119910
Percentage of LateFeeIncomeGeneratedByServicingFinancialAssetsAmount100.0100.0100.0100.0100.0100.0100.0

us-gaap:StatementScenario, us-gaap:DisposalGroupClassification, us-gaap:IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperations

us-gaap:LitigationSettlementAmountAwardedToOtherParty

srt:ScenarioForecast, us-gaap:DiscontinuedOperationsDisposedOfByMeansOtherThanSale, fe:FESandFENOC



Period End2020-02-12
Value83
Percentage of LitigationSettlementAmountAwardedToOtherParty100.0

us-gaap:NetIncomeLossFromContinuingOperationsAvailableToCommonShareholdersBasic



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value24-17838933635017233310621-1061301219257
Percentage of NetIncomeLossFromContinuingOperationsAvailableToCommonShareholdersBasic100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:NetIncomeLossFromDiscontinuedOperationsAvailableToCommonShareholdersBasic



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value50702-28-35-44-845281192-143895-45-52
Percentage of NetIncomeLossFromDiscontinuedOperationsAvailableToCommonShareholdersBasic100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OtherComprehensiveIncomeLossBeforeTax



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-312012-09-302012-06-302012-03-31
Value-23-9-7-7-6-26-16-17-109-14-21-191-15-121912-11-40-45-2635-53-13-21-39-62-40-46-43-45
Percentage of OtherComprehensiveIncomeLossBeforeTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:StatementEquityComponents

us-gaap:AccumulatedDefinedBenefitPlansAdjustment



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-31
Value-23-10-7-7-7-28-18-19-18-30-19-18-18-5-18-18-18-22-31-32-3150-42-42-42
Percentage of OtherComprehensiveIncomeLossBeforeTax100.0111.1100.0100.0116.7107.7112.5111.816.5214.390.594.7-1800.033.3150.0-94.7-150.0200.077.571.1119.2142.979.2323.1200.0

us-gaap:AccumulatedGainLossNetCashFlowHedgeParent



Period End2020-03-312019-12-312019-09-302019-03-31
Value0.01000000.00.01000000.0
Percentage of OtherComprehensiveIncomeLossBeforeTax-0.0-11.1-0.0-16.7

us-gaap:OtherComprehensiveIncomeLossCashFlowHedgeGainLossAfterReclassificationBeforeTax



Period End2020-03-312019-12-312019-09-302019-03-31
Value0301
Percentage of OtherComprehensiveIncomeLossCashFlowHedgeGainLossAfterReclassificationBeforeTax0.0100.00.0100.0

us-gaap:OtherComprehensiveIncomeLossNetOfTax



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-312012-09-302012-06-302012-03-31
Value-18-7-4-5-5-20-12-13-56-9-12-121-10-7128-6-25-28-1614-32-7-13-24-38-24-22-16-21
Percentage of OtherComprehensiveIncomeLossNetOfTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:StatementEquityComponents

us-gaap:AccumulatedDefinedBenefitPlansAdjustment



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-312012-09-302012-06-302012-03-31
Value-18-8-4-5-6-21-14-144-19-12-10-12-3-11-11-11-14-19-19-2025-26-26-26-29-33-28-22-21-24
Percentage of OtherComprehensiveIncomeLossNetOfTax100.0114.3100.0100.0120.0105.0116.7107.7-7.1211.1100.083.3-1200.030.0157.1-91.7-137.5233.376.067.9125.0178.681.2371.4200.0120.886.8116.7100.0131.2114.3

us-gaap:AccumulatedGainLossNetCashFlowHedgeParent



Period End2020-03-312019-12-312019-09-302019-03-31
Value0.01000000.00.01000000.0
Percentage of OtherComprehensiveIncomeLossNetOfTax-0.0-14.3-0.0-20.0

us-gaap:AccumulatedOtherComprehensiveIncome



Period End2020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-31
Value-18-4-5-5-12-13-56
Percentage of OtherComprehensiveIncomeLossNetOfTax100.0100.0100.0100.0100.0100.0100.0

us-gaap:OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentBeforeTax



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-312012-09-302012-06-302012-03-31
Value23107772818191830191818518181822313231-50424242475546474853
Percentage of OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentBeforeTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OtherComprehensiveIncomeLossTax



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-312012-09-302012-06-302012-03-312011-09-302011-06-302011-03-312010-09-302010-06-302010-03-31
Value-5-2-3-2-1-6-4-4-53-5-9-70-5-574-5-15-17-1021-21-6-8-15-24-16-24-27-24-6-53-114-9-7
Percentage of OtherComprehensiveIncomeLossTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:StatementEquityComponents

us-gaap:AccumulatedDefinedBenefitPlansAdjustment



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-31
Value-5-2-3-2-1-7-4-5-22-11-7-8-6-2-7-7-7-8-12-13-1125-16-16-16
Percentage of OtherComprehensiveIncomeLossTax100.0100.0100.0100.0100.0116.7100.0125.041.5220.077.8114.30.040.0140.0-100.0-175.0160.080.076.5110.0119.076.2266.7200.0

us-gaap:OtherCostAndExpenseOperating



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-09-302010-06-302010-03-31
Value7498097586067797707397059621195942957114210239539649189528509161057901858102111829488778878841165856914812928102411051033738673701
Percentage of OtherCostAndExpenseOperating100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ReclassificationOutOfAccumulatedOtherComprehensiveIncome, us-gaap:StatementEquityComponents

us-gaap:ReclassificationOutOfAccumulatedOtherComprehensiveIncome, us-gaap:AccumulatedDefinedBenefitPlansAdjustmentNetPriorServiceCostCredit



Period End2020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-312017-09-302017-06-302017-03-31
Value23777181918191818
Percentage of OtherCostAndExpenseOperating3.10.91.20.92.42.71.92.01.91.6

us-gaap:OtherOperatingActivitiesCashFlowStatement



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-03-312012-03-31
Value28-15255131-3210662-716424-27159531425951117-7735810-782-47-36
Percentage of OtherOperatingActivitiesCashFlowStatement100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:PaymentsForProceedsFromOtherInvestingActivities



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-03-312012-03-312011-06-302011-03-312010-06-302010-03-31
Value-512-52-32-4117-2012-1625-27-16-9-311-90-61-5-35482922138
Percentage of PaymentsForProceedsFromOtherInvestingActivities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:PaymentsForRemovalCosts



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-03-31
Value435955386547536157425144354438293431443928733383953
Percentage of PaymentsForRemovalCosts100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:PaymentsOfDividendsCommonStock



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-03-312012-03-312011-06-302011-03-312010-06-302010-03-31
Value211205206202201184184172171161159160159153153153152152152151152152150151151230230230190167168
Percentage of PaymentsOfDividendsCommonStock100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:PaymentsOfDividendsPreferredStockAndPreferenceStock



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value000339102121
Percentage of PaymentsOfDividendsPreferredStockAndPreferenceStock0.00.00.0100.0100.0100.0100.0100.0100.0

us-gaap:PaymentsToAcquireAvailableForSaleSecuritiesDebt



Period End2020-03-312019-03-31
Value18162
Percentage of PaymentsToAcquireAvailableForSaleSecuritiesDebt100.0100.0

us-gaap:PaymentsToAcquireProductiveAssets



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-312012-09-302012-06-302012-03-312011-09-302011-06-302011-03-312010-09-302010-06-302010-03-31
Value616753684674554733635724583740593666588679664794698679539818668839664988821548586826775412589512569449471489508
Percentage of PaymentsToAcquireProductiveAssets100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ConsolidationItems

us-gaap:CorporateNonSegment



Period End2020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-312017-09-302017-06-302017-03-312016-09-302016-06-302016-03-312015-09-30
Value9152055511214218517915
Percentage of PaymentsToAcquireProductiveAssets1.52.23.00.90.87.02.12.43.21.40.82.11.32.8

us-gaap:MaterialReconcilingItems



Period End2020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-312017-09-302017-06-302017-03-312016-09-302016-06-302016-03-312015-09-30
Value0000120150000000
Percentage of PaymentsToAcquireProductiveAssets0.00.00.00.01.90.02.60.00.00.00.00.00.00.0

us-gaap:ConsolidationItems, us-gaap:StatementBusinessSegments

us-gaap:OperatingSegments, fe:RegulatedDistribution



Period End2020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-312017-09-302017-06-302017-03-312016-09-302016-06-302016-03-312015-09-30
Value338365354318356391264286304264303287241292
Percentage of PaymentsToAcquireProductiveAssets54.953.452.557.456.154.045.348.245.644.945.636.134.554.2

us-gaap:OperatingSegments, fe:RegulatedTransmission



Period End2020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-312017-09-302017-06-302017-03-312016-09-302016-06-302016-03-312015-09-30
Value269304300231262282292248245224246277279149
Percentage of PaymentsToAcquireProductiveAssets43.744.444.541.741.339.050.141.836.838.137.034.940.027.6

us-gaap:PensionAndOtherPostretirementBenefitExpense



Period End2020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-312017-09-302017-06-302017-03-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-03-312012-03-312011-03-312010-03-31
Value-66-28-14-39-16-51-4611710141516-2-2-12-47-18-22-20-64-392824
Percentage of PensionAndOtherPostretirementBenefitExpense100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:PensionContributions



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-132016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312015-03-312014-12-312014-09-302014-06-302014-03-312013-03-312012-03-312011-03-31
Value00005000001250000050085137016000014314300000600157
Percentage of PensionContributions0.00.00.00.0100.00.00.00.0100.00.00.00.00.0100.0100.0100.00.0100.00.00.00.0100.00.00.00.00.00.0100.0100.0

us-gaap:ProceedsFromPaymentsForOtherFinancingActivities



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-03-312012-03-312011-06-302011-03-312010-06-302010-03-31
Value-361-8-3-25-60-2-19-5-15-39-13-26-4148-12-2-9-20-10-13-14-10-23-10-72-4-1-22
Percentage of ProceedsFromPaymentsForOtherFinancingActivities100.0100.0100.0100.0100.0100.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ProceedsFromSaleOfAvailableForSaleSecuritiesDebt



Period End2020-03-312019-03-31
Value13153
Percentage of ProceedsFromSaleOfAvailableForSaleSecuritiesDebt100.0100.0

us-gaap:ProceedsFromShortTermDebt



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-03-312012-03-312011-03-31
Value000-5050-4503646490000-7575-30050800425-134-975349760000018110750
Percentage of ProceedsFromShortTermDebt0.00.00.0100.0100.0100.0100.0100.0100.00.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.00.00.00.0100.0100.00.0

us-gaap:ProvisionForDoubtfulAccounts



Period End2020-03-31
Value19
Percentage of ProvisionForDoubtfulAccounts100.0

us-gaap:PublicUtilitiesAllowanceForFundsUsedDuringConstructionCapitalizedCostOfEquity



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-30
Value1111129131311121110898911989-10191614141471744
Percentage of PublicUtilitiesAllowanceForFundsUsedDuringConstructionCapitalizedCostOfEquity100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:StatementGeographical, us-gaap:RegulatoryAgency, dei:LegalEntity

us-gaap:PublicUtilitiesRequestedRateIncreaseDecreaseAmount

stpr:NJ, fe:NewJerseyBoardofPublicUtilities, fe:JcpAndL



Period End2020-02-18
Value186
Percentage of PublicUtilitiesRequestedRateIncreaseDecreaseAmount100.0

us-gaap:StatementGeographical, dei:LegalEntity

us-gaap:PublicUtilitiesRequestedRateIncreaseDecreasePercentage

stpr:NJ, fe:JcpAndL



Period End2020-02-18
Value0.078
Percentage of PublicUtilitiesRequestedRateIncreaseDecreasePercentage100.0

us-gaap:ReclassificationFromAccumulatedOtherComprehensiveIncomeCurrentPeriodBeforeTax



Period End2020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-312017-09-302017-06-302017-03-312016-09-302016-06-302016-03-312015-09-302015-06-302015-03-312014-09-302014-06-302014-03-31
Value23776161717482331332829323840556256
Percentage of ReclassificationFromAccumulatedOtherComprehensiveIncomeCurrentPeriodBeforeTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:StatementEquityComponents

us-gaap:AccumulatedDefinedBenefitPlansAdjustment



Period End2020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-312017-09-302017-06-302017-03-312016-09-302016-06-302016-03-312015-09-302015-06-302015-03-312014-09-302014-06-302014-03-31
Value23777181918191818181818313231424242
Percentage of ReclassificationFromAccumulatedOtherComprehensiveIncomeCurrentPeriodBeforeTax100.0100.0100.0116.7112.5111.8105.939.678.358.154.564.362.196.984.277.576.467.775.0

us-gaap:AccumulatedGainLossNetCashFlowHedgeParent



Period End2020-03-312019-09-302019-03-31
Value0.00.0-1000000.0
Percentage of ReclassificationFromAccumulatedOtherComprehensiveIncomeCurrentPeriodBeforeTax0.00.0-16.7

us-gaap:DisposalGroupClassification, us-gaap:IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperations, us-gaap:RelatedPartyTransaction, us-gaap:RelatedPartyTransactionsByRelatedParty, dei:LegalEntity

us-gaap:RelatedPartyTransactionAmountsOfTransaction

us-gaap:DiscontinuedOperationsDisposedOfByMeansOtherThanSale, fe:FESandFENOC, fe:BenefitObligations, srt:AffiliatedEntity, fe:Fes



Period End2020-03-312019-09-302019-06-302019-03-31
Value69910
Percentage of RelatedPartyTransactionAmountsOfTransaction100.0100.0100.0100.0

us-gaap:DiscontinuedOperationsDisposedOfByMeansOtherThanSale, fe:FESandFENOC, fe:ServicesAgreements, srt:AffiliatedEntity, fe:Fes



Period End2020-03-312019-12-312019-09-302019-06-302019-03-31
Value3431206735
Percentage of RelatedPartyTransactionAmountsOfTransaction566.70.0222.2744.4350.0

us-gaap:DisposalGroupClassification, us-gaap:IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperations, us-gaap:RelatedPartyTransaction, us-gaap:RelatedPartyTransactionsByRelatedParty, dei:LegalEntity

us-gaap:RelatedPartyTransactionPurchasesFromRelatedParty

us-gaap:DiscontinuedOperationsDisposedOfByMeansOtherThanSale, fe:FESandFENOC, fe:PowerPurchaseAgreements, srt:AffiliatedEntity, fe:Fes



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-30
Value1721244383707471
Percentage of RelatedPartyTransactionPurchasesFromRelatedParty100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:RepaymentsOfShortTermDebt



Period End2020-03-312019-03-312018-12-312018-09-302017-12-312017-09-302016-12-312016-09-302015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-03-312011-06-302011-03-312010-03-31
Value250000200-2750091000-17870276231900000-170214295
Percentage of RepaymentsOfShortTermDebt100.00.00.00.0100.0100.00.00.0100.00.00.00.0100.0100.0100.0100.00.00.00.00.00.0100.0100.0100.0

us-gaap:StockGrantedDuringPeriodValueSharebasedCompensation



Period End2020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-31
Value9797101919
Percentage of StockGrantedDuringPeriodValueSharebasedCompensation100.0100.0100.0100.0100.0100.0100.0

us-gaap:StatementEquityComponents

us-gaap:AdditionalPaidInCapital



Period End2020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-31
Value9797101919
Percentage of StockGrantedDuringPeriodValueSharebasedCompensation100.0100.0100.0100.0100.0100.0100.0

us-gaap:StatementEquityComponents

us-gaap:StockIssuedDuringPeriodSharesEmployeeBenefitPlan

us-gaap:CommonStock



Period End2020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-31
Value1111112
Percentage of StockIssuedDuringPeriodSharesEmployeeBenefitPlan100.0100.0100.0100.0100.0100.0100.0

us-gaap:StockIssuedDuringPeriodValueEmployeeBenefitPlan



Period End2020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-31
Value-152021121196
Percentage of StockIssuedDuringPeriodValueEmployeeBenefitPlan100.0100.0100.0100.0100.0100.0100.0

us-gaap:StatementEquityComponents

us-gaap:AdditionalPaidInCapital



Period End2020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-31
Value-152021121195
Percentage of StockIssuedDuringPeriodValueEmployeeBenefitPlan100.0100.0100.0100.0100.0100.083.3

us-gaap:UndistributedContinuingOperationEarningsLossAllocationToParticipatingSecuritiesBasic



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value0-3052001300000
Percentage of UndistributedContinuingOperationEarningsLossAllocationToParticipatingSecuritiesBasic0.0100.00.0100.0100.00.00.0100.00.00.00.00.00.0

us-gaap:UndistributedDiscontinuedOperationEarningsLossAllocationToParticipatingSecuritiesBasic



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value000-1000400000
Percentage of UndistributedDiscontinuedOperationEarningsLossAllocationToParticipatingSecuritiesBasic0.00.00.0100.00.00.00.0100.00.00.00.00.00.0

us-gaap:UndistributedEarningsLossAllocatedToParticipatingSecuritiesBasic



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value0004510541651560000
Percentage of UndistributedEarningsLossAllocatedToParticipatingSecuritiesBasic0.00.00.0100.0100.0100.0100.0100.0100.00.00.00.00.0

us-gaap:UtilitiesOperatingExpensePurchasedPower



Period End2020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-312017-09-30
Value694798611781876697820774
Percentage of UtilitiesOperatingExpensePurchasedPower100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:UtilitiesOperatingExpenseTaxes



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-312012-09-302012-06-302012-03-312011-09-302011-06-30
Value267251257239261247252245259266253253271256265241280231236242269224239228271242241265257232272269242
Percentage of UtilitiesOperatingExpenseTaxes100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

fe:AdversePowerContractLiability



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302010-12-31
Value38496679858999113124130143152157162174181194197205203213217222237255290467484465506550559458469665649466
Percentage of AdversePowerContractLiability100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

fe:CashandCashEquivalentsHeldforSaleFairValueDisclosure



Period End2020-03-312019-12-31
Value751747
Percentage of CashandCashEquivalentsHeldforSaleFairValueDisclosure100.0100.0

us-gaap:StatementBusinessSegments, us-gaap:StatementScenario

fe:DeactivatedPowerPlantsCapacity

fe:CompetitiveEnergyServices, us-gaap:ScenarioForecast



Period End2020-12-31
Value856.0
Percentage of DeactivatedPowerPlantsCapacity100.0

fe:DebtSecuritiesHeldforsale



Period End2020-03-312019-12-31
Value124135
Percentage of DebtSecuritiesHeldforsale100.0100.0

fe:DeferredChargesandOtherAssetsNoncurrent



Period End2020-03-312019-12-31
Value66446756
Percentage of DeferredChargesandOtherAssetsNoncurrent100.0100.0

fe:DefinedBenefitPlanMarktoMarketAdjustmentNet



Period End2020-03-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-31
Value423676145141147242835-256609
Percentage of DefinedBenefitPlanMarktoMarketAdjustmentNet100.0100.0100.0100.0100.0100.0100.0100.0100.0

fe:DisposalGroupIncludingDiscontinuedOperationInvestments



Period End2020-03-312019-12-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value87588200001875
Percentage of DisposalGroupIncludingDiscontinuedOperationInvestments100.0100.00.00.00.00.0100.0

us-gaap:DerivativeInstrumentRisk, us-gaap:FairValueByFairValueHierarchyLevel

fe:FairValueMeasurementsWithUnobservableInputsReconciliationRecurringBasisAssetAndLiabilityNetValue

fe:Ftrs, us-gaap:FairValueInputsLevel3



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312011-12-312010-12-31
Value-1332-19901332-4169-6-53102252421-1-8-11-2-3-1-220
Percentage of FairValueMeasurementsWithUnobservableInputsReconciliationRecurringBasisAssetAndLiabilityNetValue100.0100.0100.0100.0100.0100.0100.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0

fe:NonUtilityGenerationContract, us-gaap:FairValueInputsLevel3



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312011-12-312010-12-31
Value-6-16-24-35-41-44-52-65-74-79-92-99-103-107-118-123-135-136-143-140-148-151-155-169-185-202-210-232-213-254-292-344
Percentage of FairValueMeasurementsWithUnobservableInputsReconciliationRecurringBasisAssetAndLiabilityNetValue600.0-533.3-800.0-1750.04100.0-488.9-577.80.0-7400.0-2633.3-3066.7-4950.02575.0-10700.0-1966.7-1366.72250.02720.0-4766.7-1400.0-7400.0-604.0-645.8-804.818500.02525.01909.111600.07100.025400.01327.30.0

us-gaap:DerivativeInstrumentRisk, us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:ValuationTechnique

fe:Ftrs, us-gaap:FairValueInputsLevel3, fe:Model



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-31
Value-1332-19901332-4169-6-53102252421-1-8-11-2-3-1
Percentage of FairValueMeasurementsWithUnobservableInputsReconciliationRecurringBasisAssetAndLiabilityNetValue100.0100.0100.0100.0100.0100.0100.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

fe:NonUtilityGenerationContract, us-gaap:FairValueInputsLevel3, fe:Model



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-31
Value-6-16-24-35-41-44-52-65-74-79-92-99-103-107-118-123-135-136-143-140-148-151-155-169-185-202-210-232-213-254
Percentage of FairValueMeasurementsWithUnobservableInputsReconciliationRecurringBasisAssetAndLiabilityNetValue600.0-533.3-800.0-1750.04100.0-488.9-577.80.0-7400.0-2633.3-3066.7-4950.02575.0-10700.0-1966.7-1366.72250.02720.0-4766.7-1400.0-7400.0-604.0-645.8-804.818500.02525.01909.111600.07100.025400.0

us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FairValueByMeasurementFrequency

fe:FairValueOfAssetsLiabilitiesNet

us-gaap:FairValueInputsLevel1, us-gaap:FairValueMeasurementsRecurring



Period End2020-03-312019-12-312018-12-31
Value168629706
Percentage of FairValueOfAssetsLiabilitiesNet100.0100.0100.0

us-gaap:FairValueInputsLevel2, us-gaap:FairValueMeasurementsRecurring



Period End2020-03-312019-12-312018-12-31
Value12001195722
Percentage of FairValueOfAssetsLiabilitiesNet714.3190.0102.3

us-gaap:FairValueInputsLevel3, us-gaap:FairValueMeasurementsRecurring



Period End2020-03-312019-12-312018-12-31
Value-7-13-35
Percentage of FairValueOfAssetsLiabilitiesNet-4.2-2.1-5.0

us-gaap:FairValueByMeasurementFrequency

us-gaap:FairValueMeasurementsRecurring



Period End2020-03-312019-12-312018-12-31
Value136118111393
Percentage of FairValueOfAssetsLiabilitiesNet810.1287.9197.3

fe:InvestmentsExcludesReceivablesPayablesDeferredTaxesAndAccruedIncome



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302010-12-31
Value-18-16-15-15-124-33-12-15-8-13-18-14-3-87-67-4-6-3240-45-36910134-1011043-72-52-296-7
Percentage of InvestmentsExcludesReceivablesPayablesDeferredTaxesAndAccruedIncome100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

fe:InvestmentsNotRequiredToBeDisclosed



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312009-12-31
Value288299283275257253254255252255255254269266276273271255623636642626633636635636646640640644709716689693312345345259264
Percentage of InvestmentsNotRequiredToBeDisclosed100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

fe:NetPlantExcludingConstructionWorkInProgress



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312009-12-31
Value305493034029782294332906728676281172787127450278532814327930272072803635439350723495034792342833413433484333343262432336312273094830922308613092530610293222883128501282832754727975268231827116429
Percentage of NetPlantExcludingConstructionWorkInProgress100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

fe:NuclearFuelDisposalTrust



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312011-09-302011-06-302010-12-31
Value275270271265259256253252251251218212208
Percentage of NuclearFuelDisposalTrust100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:StatementBusinessSegments

fe:PlantCapacity

fe:RegulatedDistribution



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-09-302016-06-302016-03-312015-09-302015-06-302015-03-312014-09-302014-06-302014-03-312013-10-09
Value3790.03790.03790.03790.03790.03790.03790.03790.03790.03790.03790.03790.03790.03790.03790.03790.03790.03790.03790.03790.03790.03780.03780.0
Percentage of PlantCapacity100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:StatementGeographical, us-gaap:SubsequentEventType, fe:AssetAcquisition, dei:LegalEntity

stpr:NJ, us-gaap:SubsequentEvent, fe:YardsCreekEnergyLLCHydroGenerationFacility, fe:JcpAndL



Period End2020-04-06
Value210.0
Percentage of PlantCapacity0.0

fe:PropertyPlantAndEquipmentExcludingConstructionInProgress



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302011-12-31
Value421844176741016405724002839469385853833437717397784422943929429764376750889503675037149952492004886247992474844666446133447824422844089438884374843210417564116740122
Percentage of PropertyPlantAndEquipmentExcludingConstructionInProgress100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

dei:LegalEntity, us-gaap:PublicUtilitiesRegulatoryProceeding, us-gaap:RegulatoryAgency, us-gaap:StatementGeographical, us-gaap:StatementScenario

fe:PublicUtilityCapacityShortfall

fe:MonogahelaPowerCompany, fe:AcceleratedRecoveryCostsForModernizingandImprovingCoalFiredBoilers, fe:PublicServiceCommissionofWestVirginia, stpr:WV, us-gaap:ScenarioForecast



Period End2020-12-31
Value700.0
Percentage of PublicUtilityCapacityShortfall100.0

fe:MonogahelaPowerCompany, fe:IntegratedResourcePlan, fe:PublicServiceCommissionofWestVirginia, stpr:WV, us-gaap:ScenarioForecast



Period End2027-12-31
Value850.0
Percentage of PublicUtilityCapacityShortfall0.0

fe:MonogahelaPowerCompanyandThePotomacEdisonCompany, fe:AcceleratedRecoveryCostsForModernizingandImprovingCoalFiredBoilers, fe:PublicServiceCommissionofWestVirginia, stpr:WV, us-gaap:ScenarioForecast



Period End2020-12-31
Value700.0
Percentage of PublicUtilityCapacityShortfall100.0

fe:MonongahelaPowerCompany, fe:AcceleratedRecoveryCostsForModernizingandImprovingCoalFiredBoilers, fe:PublicServiceCommissionofWestVirginia, stpr:WV, us-gaap:ScenarioForecast



Period End2020-12-31
Value700.0
Percentage of PublicUtilityCapacityShortfall100.0

fe:MonongahelaPowerCompany, fe:IntegratedResourcePlan, fe:PublicServiceCommissionofWestVirginia, stpr:WV, us-gaap:ScenarioForecast



Period End2027-12-31
Value850.0
Percentage of PublicUtilityCapacityShortfall0.0

us-gaap:CreditFacility, us-gaap:Range, us-gaap:ShortTermDebtType, us-gaap:StatementScenario

fe:RatioofInterestCoverage

us-gaap:RevolvingCreditFacility, us-gaap:Minimum, us-gaap:LineOfCredit, us-gaap:ScenarioForecast



Period End2021-12-312019-12-312018-12-312017-12-31
Value2.52.252.01.75
Percentage of RatioofInterestCoverage100.0100.0100.0100.0

us-gaap:AccountsNotesLoansAndFinancingReceivableByReceivableType

us-gaap:AccountsReceivableGrossCurrent

fe:Customer



Period End2020-03-312019-12-31
Value10531137
Percentage of AccountsReceivableGrossCurrent100.0100.0

us-gaap:AccruedEmployeeBenefitsCurrent



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312009-12-31
Value252258268231253318300264254336337293307363365341309334345323249329277283232351289298240331313288258384350331312315293
Percentage of AccruedEmployeeBenefitsCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:AdditionalPaidInCapitalCommonStock



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312009-12-31
Value10651108681104711411113811153011708119751193710001997410272102531055510012998499639952992698959871984798369817979397769755974497399769975897569754976597829782977954445448
Percentage of AdditionalPaidInCapitalCommonStock100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:AllowanceForDoubtfulAccountsReceivable



Period End2020-03-312019-12-312018-12-31
Value444650
Percentage of AllowanceForDoubtfulAccountsReceivable100.0100.0100.0

us-gaap:AccountsNotesLoansAndFinancingReceivableByReceivableType

us-gaap:AllowanceForDoubtfulAccountsReceivableCurrent

fe:Customer



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302010-12-31
Value44464646485049495051525252536163646964626059635955524140414043363537373536
Percentage of AllowanceForDoubtfulAccountsReceivableCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

fe:OtherReceivables



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302010-12-31
Value262173122211111133555555533333342283988
Percentage of AllowanceForDoubtfulAccountsReceivableCurrent59.145.715.26.52.14.04.14.12.02.01.91.91.91.94.94.87.87.27.88.18.38.57.95.15.55.87.37.57.310.04.75.622.98.124.322.922.2

us-gaap:AssetRetirementObligationsNoncurrent



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312009-12-31
Value168165844833822812630589580251515501526150514821459144814271410142914111390138717551730170416781834179517671599157415481522149714731459144314071425
Percentage of AssetRetirementObligationsNoncurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DisposalGroupClassification, us-gaap:PublicUtility, us-gaap:StatementBusinessSegments

us-gaap:AssetsOfDisposalGroupIncludingDiscontinuedOperation

us-gaap:DisposalGroupHeldforsaleNotDiscontinuedOperations, fe:ThreeMileIslandUnit2, fe:RegulatedDistribution



Period End2020-03-312019-12-31
Value875882
Percentage of AssetsOfDisposalGroupIncludingDiscontinuedOperation100.0100.0

us-gaap:AssetsOfDisposalGroupIncludingDiscontinuedOperationCurrent



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value033334421251702606
Percentage of AssetsOfDisposalGroupIncludingDiscontinuedOperationCurrent0.0100.0100.0100.0100.0100.0100.00.0100.0100.0

us-gaap:FinancialInstrument

us-gaap:AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedGainBeforeTax

us-gaap:DebtSecurities



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value89272210222511
Percentage of AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedGainBeforeTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:FinancialInstrument

us-gaap:AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedLossBeforeTax

us-gaap:DebtSecurities



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value16111415162823272217
Percentage of AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedLossBeforeTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:FinancialInstrument

us-gaap:AvailableForSaleDebtSecuritiesAmortizedCostBasis

us-gaap:DebtSecurities



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value405403736730723714712783783774
Percentage of AvailableForSaleDebtSecuritiesAmortizedCostBasis100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:FinancialInstrument

us-gaap:AvailableForSaleSecuritiesDebtSecurities

us-gaap:DebtSecurities



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value397401749737717688691758766768
Percentage of AvailableForSaleSecuritiesDebtSecurities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:RelatedPartyTransaction, us-gaap:RelatedPartyTransactionsByRelatedParty, dei:LegalEntity

us-gaap:BankruptcyClaimsAmountPaidToSettleClaims

fe:FESKeyCreditorGroups, srt:AffiliatedEntity, fe:Fes



Period End2020-02-27
Value853
Percentage of BankruptcyClaimsAmountPaidToSettleClaims100.0

fe:ITAccessAgreement, srt:AffiliatedEntity, fe:Fes



Period End2020-02-27
Value125
Percentage of BankruptcyClaimsAmountPaidToSettleClaims14.7

us-gaap:CapitalizationLongtermDebtAndEquity



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302010-12-31
Value27635265932669426322257462456523481241602411525040274952690223901244333003529755313423161431721311013148031598312353110029409285262783828252288142827229076286712886629015288382944121092
Percentage of CapitalizationLongtermDebtAndEquity100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:CashAndCashEquivalentsFairValueDisclosure



Period End2020-03-312019-12-312018-12-31
Value75375120
Percentage of CashAndCashEquivalentsFairValueDisclosure100.0100.0100.0

us-gaap:CommonStockValueOutstanding



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312009-12-31
Value545454535351514848444444444443424242424242424242424242424242424242424242423131
Percentage of CommonStockValueOutstanding100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ConstructionInProgressGross



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312009-12-31
Value145613101370124511991235129011501120102613551249158813512394238926942422232722822633244923012180266123042301223023612293211919372065205417201465232215172735
Percentage of ConstructionInProgressGross100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DeferredIncomeTaxLiabilitiesNet



Period End2020-03-312019-12-312019-09-302018-12-31
Value2774284929002502
Percentage of DeferredIncomeTaxLiabilitiesNet100.0100.0100.0100.0

us-gaap:DerivativeInstrumentRisk, us-gaap:FairValueByFairValueHierarchyLevel

us-gaap:FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetValue

fe:Ftrs, us-gaap:FairValueInputsLevel3



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312011-12-312010-12-31
Value04660101051454071317381723739353774372810
Percentage of FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetValue0.0100.0100.0100.00.0100.0100.0100.0100.0100.0100.0100.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0

fe:NonUtilityGenerationContract, us-gaap:FairValueInputsLevel3



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312011-12-312010-12-31
Value0000000000000101111122223202324343657122
Percentage of FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetValue0.00.00.00.00.00.00.00.00.00.00.00.00.014.30.05.933.312.55.94.328.65.15.75.442.9500.0766.7342.91700.0450.05700.00.0

us-gaap:DerivativeInstrumentRisk, us-gaap:FairValueByFairValueHierarchyLevel

us-gaap:FairValueMeasurementWithUnobservableInputsReconciliationsRecurringBasisLiabilityValue

fe:Ftrs, us-gaap:FairValueInputsLevel3



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312011-12-312010-12-31
Value11341115012246789131413514111681214959230
Percentage of FairValueMeasurementWithUnobservableInputsReconciliationsRecurringBasisLiabilityValue100.0100.0100.0100.0100.0100.0100.0100.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0

fe:NonUtilityGenerationContract, us-gaap:FairValueInputsLevel3



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312011-12-312010-12-31
Value61624354144526574799299103108118124136137144141150153157171188222233256247290349466
Percentage of FairValueMeasurementWithUnobservableInputsReconciliationsRecurringBasisLiabilityValue600.01600.0800.0875.04100.04400.05200.01300.00.07900.04600.04950.02575.01800.01685.71550.01511.11053.81028.61084.63000.01092.91427.31068.82350.01850.01664.32844.44940.03222.21517.40.0

us-gaap:GuaranteeObligationsCurrentCarryingValue



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312010-12-31
Value17001600160017001700170017001700190038003300330033003300340035003700370037003900400040004000400040004300440039004000400041004100410037003700
Percentage of GuaranteeObligationsCurrentCarryingValue100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:GuaranteedInsuranceContractTypeOfGuarantee

fe:OtherAssurances



Period End2020-03-312019-06-302019-03-312018-09-302018-06-302018-03-312017-09-302017-06-302017-03-312016-09-302016-06-302016-03-312015-09-302015-06-302015-03-31
Value502140140141128178457466456504597669671717729
Percentage of GuaranteeObligationsCurrentCarryingValue29.58.28.28.37.59.413.814.113.814.817.118.118.118.418.2

srt:ParentCompany



Period End2020-03-312019-09-302019-06-302019-03-312018-09-30
Value11001000100010001000
Percentage of GuaranteeObligationsCurrentCarryingValue64.762.558.858.858.8

us-gaap:GuaranteeTypeOther



Period End2020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-312017-09-302017-06-302017-03-312016-09-302016-06-302016-03-312015-09-302015-06-302015-03-31
Value114145180188220235255300300300300300300300300300
Percentage of GuaranteeObligationsCurrentCarryingValue6.79.110.611.112.913.813.49.19.19.18.88.68.18.17.77.5

us-gaap:GuaranteeObligationsMaximumExposure



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-31
Value3533573513503583693623523934074124204194254993794064203875587111044946985941923903846823773819804671636
Percentage of GuaranteeObligationsMaximumExposure100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ConsolidatedEntities

srt:ParentCompany



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-30
Value257257246246246246246
Percentage of GuaranteeObligationsMaximumExposure72.872.070.170.368.766.768.0

us-gaap:ConsolidatedEntities, us-gaap:GuaranteeObligationsByNature

srt:ParentCompany, us-gaap:SuretyBond



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-30
Value257257246246246246246
Percentage of GuaranteeObligationsMaximumExposure72.872.070.170.368.766.768.0

us-gaap:GuaranteeObligationsByNature

fe:UponFurtherDowngrade



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-30
Value333640435162545646414243504848
Percentage of GuaranteeObligationsMaximumExposure9.310.111.412.314.216.814.915.911.710.110.210.211.911.39.6

us-gaap:SuretyBond



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-30
Value320320310306306306307295346361362369358367360
Percentage of GuaranteeObligationsMaximumExposure90.789.688.387.485.582.984.883.888.088.787.987.985.486.472.1

us-gaap:GuaranteeObligationsByNature, us-gaap:StatementBusinessSegments

fe:UponFurtherDowngrade, fe:RegulatedDistributionandRegulatedTransmission



Period End2020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-312017-09-302017-06-302017-03-312016-09-30
Value3340435154564642435048
Percentage of GuaranteeObligationsMaximumExposure9.311.412.314.214.915.911.710.210.211.99.6

us-gaap:SuretyBond, fe:RegulatedDistributionandRegulatedTransmission



Period End2020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-312017-09-302017-06-302017-03-312016-09-30
Value636359596059109105929396
Percentage of GuaranteeObligationsMaximumExposure17.817.916.916.516.616.827.725.521.922.219.2

us-gaap:StatementBusinessSegments

fe:RegulatedDistributionandRegulatedTransmission



Period End2020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-312017-09-302017-06-302017-03-312016-09-30
Value96103102110114115155147135143144
Percentage of GuaranteeObligationsMaximumExposure27.229.329.130.731.532.739.435.732.134.128.9

us-gaap:InterestPayableCurrent



Period End2020-03-312019-12-312018-12-31
Value278249243
Percentage of InterestPayableCurrent100.0100.0100.0

us-gaap:LiabilitiesOfDisposalGroupIncludingDiscontinuedOperationNoncurrent



Period End2020-03-312019-12-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value70069100003399
Percentage of LiabilitiesOfDisposalGroupIncludingDiscontinuedOperationNoncurrent100.0100.00.00.00.00.0100.0

us-gaap:LongTermDebtAndCapitalLeaseObligations



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312009-12-31
Value208211961819422190531881417751166081646116740211152108920582177621819218532183481887819192190931857019130191761853118415168041583115291154491581415179156271515915527157161582316491175351257912008
Percentage of LongTermDebtAndCapitalLeaseObligations100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:LongTermDebtAndCapitalLeaseObligationsCurrent



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312009-12-31
Value3813803813812065031128113211571082107620152147168512161327135511661148129278780413861016141614151889195222961999147315771772162118402058138514861834
Percentage of LongTermDebtAndCapitalLeaseObligationsCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OtherLongTermInvestments



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312009-12-31
Value2882992832752572532542552525065115075195125335275265068758868988818948968988708768769349361038103910111008440479434553621
Percentage of OtherLongTermInvestments100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OtherReceivables



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312009-12-31
Value245203206218238270299177159191172161155175159153162180180181201225214231218198231277227315227263286269247256229176153
Percentage of OtherReceivables100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:RegulatoryAssetsNoncurrent



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312009-12-31
Value919977941029180844940929994100010141088118712791348143015231372141116681732179818542146232123122375211321222006203021602182208418262356
Percentage of RegulatoryAssetsNoncurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:RegulatoryLiabilityNoncurrent



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-31
Value2266236026052584257424982673253726322720157116243440392381
Percentage of RegulatoryLiabilityNoncurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:RestrictedCashCurrent



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value33523452366251685151
Percentage of RestrictedCashCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ShortTermBorrowings



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312009-12-31
Value75010001000125013001250170016641200300500225275026752975292521251708193329082559179916212323308534043404325421501969160418901075006564867001081
Percentage of ShortTermBorrowings100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.00.0100.0100.0100.0100.0

Line plots across dimensions of each concept

us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:ConsolidationItems, us-gaap:StatementBusinessSegments


us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:ProductOrService


us-gaap:Revenues us-gaap:StatementBusinessSegments


us-gaap:Revenues us-gaap:ConsolidationItems


us-gaap:Revenues us-gaap:ProductOrService


us-gaap:Revenues us-gaap:MajorCustomers, us-gaap:StatementBusinessSegments


us-gaap:Revenues us-gaap:MajorCustomers, us-gaap:StatementBusinessSegments


us-gaap:Revenues us-gaap:ConsolidationItems, us-gaap:ProductOrService


us-gaap:InterestExpense us-gaap:ConsolidationItems


us-gaap:InterestExpense us-gaap:ConsolidationItems, us-gaap:StatementBusinessSegments


us-gaap:OtherNonoperatingIncomeExpense us-gaap:ConsolidationItems


us-gaap:OtherNonoperatingIncomeExpense us-gaap:ConsolidationItems, us-gaap:StatementBusinessSegments


us-gaap:IncomeLossFromContinuingOperationsIncludingPortionAttributableToNoncontrollingInterest us-gaap:ConsolidationItems, us-gaap:StatementBusinessSegments


us-gaap:IncomeTaxExpenseBenefit us-gaap:ConsolidationItems


us-gaap:IncomeTaxExpenseBenefit us-gaap:ConsolidationItems, us-gaap:StatementBusinessSegments


us-gaap:NetIncomeLoss us-gaap:ReclassificationOutOfAccumulatedOtherComprehensiveIncome, us-gaap:StatementEquityComponents


us-gaap:Assets us-gaap:ConsolidationItems


us-gaap:Assets us-gaap:ConsolidationItems, us-gaap:StatementBusinessSegments


us-gaap:StockholdersEquity us-gaap:StatementEquityComponents


us-gaap:Goodwill us-gaap:ConsolidationItems, us-gaap:StatementBusinessSegments


us-gaap:LongTermDebt us-gaap:FairValueByMeasurementBasis


us-gaap:StockholdersEquity us-gaap:StatementEquityComponents


us-gaap:NetIncomeLoss us-gaap:ReclassificationOutOfAccumulatedOtherComprehensiveIncome, us-gaap:StatementEquityComponents