NRG


Line plots across dimensions of each concept
Line plots across concepts
Tables

Table of contents



us-gaap:CommonStockValue

us-gaap:WeightedAverageNumberOfDilutedSharesOutstanding

us-gaap:WeightedAverageNumberOfSharesOutstandingBasic

us-gaap:AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount

us-gaap:EarningsPerShareBasic

us-gaap:EarningsPerShareDiluted

us-gaap:IncomeLossFromContinuingOperationsPerBasicShare

us-gaap:IncomeLossFromContinuingOperationsPerDilutedShare

us-gaap:ComprehensiveIncomeNetOfTax
us-gaap:ConsolidatedEntities
us-gaap:ConsolidationItems

us-gaap:ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest

us-gaap:CostOfRevenue
us-gaap:ConsolidatedEntities
us-gaap:ConsolidationItems

us-gaap:CostsAndExpenses
us-gaap:ConsolidatedEntities
us-gaap:ConsolidationItems

us-gaap:DisposalGroupNotDiscontinuedOperationGainLossOnDisposal
us-gaap:ConsolidationItems, us-gaap:StatementBusinessSegments
us-gaap:DisposalGroupClassification, us-gaap:IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperations

us-gaap:GainsLossesOnExtinguishmentOfDebt
us-gaap:ConsolidatedEntities
us-gaap:DisposalGroupClassification, us-gaap:IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperations

us-gaap:IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest
us-gaap:BusinessAcquisition
us-gaap:ConsolidatedEntities
us-gaap:ConsolidationItems
us-gaap:ConsolidationItems, us-gaap:StatementBusinessSegments

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

us-gaap:IncomeTaxExpenseBenefit
us-gaap:ConsolidatedEntities

us-gaap:InterestExpense
us-gaap:ConsolidatedEntities

us-gaap:NetIncomeLoss
us-gaap:ConsolidatedEntities
us-gaap:ConsolidationItems
us-gaap:ConsolidationItems, us-gaap:StatementBusinessSegments
us-gaap:StatementEquityComponents

us-gaap:NetIncomeLossAvailableToCommonStockholdersBasic

us-gaap:NetIncomeLossAvailableToCommonStockholdersDiluted

us-gaap:NonoperatingIncomeExpense
us-gaap:ConsolidatedEntities
us-gaap:ConsolidationItems

us-gaap:OperatingIncomeLoss
us-gaap:ConsolidatedEntities

us-gaap:OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax
us-gaap:ConsolidatedEntities
us-gaap:ConsolidationItems

us-gaap:OtherComprehensiveIncomeLossNetOfTax
us-gaap:ConsolidatedEntities
us-gaap:ConsolidationItems
us-gaap:StatementEquityComponents

us-gaap:OtherNonoperatingIncomeExpense
us-gaap:ConsolidatedEntities

us-gaap:ProfitLoss
us-gaap:ConsolidatedEntities
us-gaap:ConsolidationItems
us-gaap:StatementEquityComponents

us-gaap:ResearchAndDevelopmentExpense
us-gaap:ConsolidatedEntities

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

us-gaap:Revenues
us-gaap:BusinessAcquisition
us-gaap:ConsolidatedEntities
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:SellingGeneralAndAdministrativeExpense
us-gaap:ConsolidatedEntities

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

us-gaap:Liabilities
us-gaap:ConsolidatedEntities
us-gaap:ConsolidationItems

us-gaap:LiabilitiesAndStockholdersEquity
us-gaap:ConsolidatedEntities
us-gaap:ConsolidationItems

us-gaap:AssetsCurrent
us-gaap:ConsolidatedEntities
us-gaap:ConsolidationItems

us-gaap:CashAndCashEquivalentsAtCarryingValue
us-gaap:ConsolidatedEntities

us-gaap:AccountsReceivableNetCurrent
us-gaap:ConsolidatedEntities
us-gaap:ConsolidationItems
us-gaap:ConsolidatedEntities
us-gaap:ReceivablesNetCurrent

us-gaap:InventoryNet
us-gaap:ConsolidatedEntities
us-gaap:ConsolidatedEntities
us-gaap:OtherAssetsCurrent

us-gaap:PrepaidExpenseAndOtherAssetsCurrent
us-gaap:ConsolidatedEntities

us-gaap:AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment

us-gaap:PropertyPlantAndEquipmentNet
us-gaap:ConsolidatedEntities
us-gaap:ConsolidatedEntities
us-gaap:InvestmentsInAffiliatesSubsidiariesAssociatesAndJointVentures
us-gaap:ConsolidationItems

us-gaap:Goodwill
us-gaap:BusinessAcquisition
us-gaap:ConsolidatedEntities
us-gaap:IndefiniteLivedIntangibleAssetsByMajorClass
us-gaap:IndefiniteLivedIntangibleAssetsExcludingGoodwill

us-gaap:FiniteLivedIntangibleAssetsNet
us-gaap:ConsolidatedEntities
us-gaap:FiniteLivedIntangibleAssetsByMajorClass

us-gaap:DeferredTaxAssetsLiabilitiesNet

us-gaap:OperatingLeaseRightOfUseAsset
us-gaap:ConsolidatedEntities

us-gaap:OtherAssetsNoncurrent
us-gaap:ConsolidatedEntities

us-gaap:AccountsPayableCurrent
us-gaap:ConsolidatedEntities
us-gaap:ConsolidationItems

us-gaap:AccruedIncomeTaxesCurrent

us-gaap:LiabilitiesCurrent
us-gaap:ConsolidatedEntities
us-gaap:ConsolidationItems

us-gaap:LongTermDebtCurrent
us-gaap:ConsolidatedEntities

us-gaap:OperatingLeaseLiabilityCurrent
us-gaap:ConsolidatedEntities

us-gaap:OtherAccruedLiabilitiesCurrent
us-gaap:ConsolidatedEntities

us-gaap:LiabilitiesNoncurrent
us-gaap:ConsolidatedEntities
us-gaap:ConsolidationItems

us-gaap:LongTermDebt

us-gaap:LongTermDebtNoncurrent
us-gaap:ConsolidatedEntities

us-gaap:DebtAndCapitalLeaseObligations

us-gaap:LongTermDebtAndCapitalLeaseObligations

us-gaap:DeferredIncomeTaxLiabilitiesNet
us-gaap:ConsolidatedEntities
us-gaap:RetirementPlanType
us-gaap:PensionAndOtherPostretirementDefinedBenefitPlansLiabilitiesNoncurrent

us-gaap:OtherLiabilitiesNoncurrent
us-gaap:ConsolidatedEntities

us-gaap:OperatingLeaseLiabilityNoncurrent
us-gaap:ConsolidatedEntities

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearTwo

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearThree

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearFour

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearFive

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueAfterYearFive

us-gaap:OperatingLeaseLiability
us-gaap:PropertyPlantAndEquipmentByType

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDue

us-gaap:LesseeOperatingLeaseLiabilityUndiscountedExcessAmount

us-gaap:StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest
us-gaap:ConsolidatedEntities
us-gaap:ConsolidationItems
us-gaap:StatementEquityComponents

us-gaap:CommonStockValue

us-gaap:AdditionalPaidInCapitalCommonStock

us-gaap:RetainedEarningsAccumulatedDeficit

us-gaap:AccumulatedOtherComprehensiveIncomeLossNetOfTax

us-gaap:TreasuryStockValue

us-gaap:StockIssuedDuringPeriodValueNewIssues
us-gaap:StatementEquityComponents

us-gaap:AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue
us-gaap:StatementEquityComponents

us-gaap:NetCashProvidedByUsedInOperatingActivities
us-gaap:ConsolidatedEntities

us-gaap:NetCashProvidedByUsedInInvestingActivities
us-gaap:ConsolidatedEntities
us-gaap:ConsolidationItems

us-gaap:NetCashProvidedByUsedInFinancingActivities
us-gaap:ConsolidatedEntities
us-gaap:ConsolidationItems

us-gaap:CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect
us-gaap:ConsolidatedEntities

us-gaap:DepreciationDepletionAndAmortization
us-gaap:ConsolidatedEntities
us-gaap:ConsolidationItems
us-gaap:ConsolidationItems, us-gaap:StatementBusinessSegments

us-gaap:IncreaseDecreaseInOtherOperatingCapitalNet
us-gaap:ConsolidatedEntities

us-gaap:NetCashProvidedByUsedInOperatingActivities
us-gaap:ConsolidatedEntities

us-gaap:NetIncomeLoss
us-gaap:ConsolidatedEntities
us-gaap:ConsolidationItems
us-gaap:ConsolidationItems, us-gaap:StatementBusinessSegments
us-gaap:StatementEquityComponents

us-gaap:ProfitLoss
us-gaap:ConsolidatedEntities
us-gaap:ConsolidationItems
us-gaap:StatementEquityComponents

us-gaap:ShareBasedCompensation
us-gaap:ConsolidatedEntities

us-gaap:NetCashProvidedByUsedInInvestingActivities
us-gaap:ConsolidatedEntities
us-gaap:ConsolidationItems

us-gaap:PaymentsToAcquirePropertyPlantAndEquipment
us-gaap:ConsolidatedEntities

us-gaap:NetCashProvidedByUsedInFinancingActivities
us-gaap:ConsolidatedEntities
us-gaap:ConsolidationItems
us-gaap:BusinessAcquisition
us-gaap:ProceedsFromIssuanceOfLongTermDebt

us-gaap:PaymentsOfDividendsCommonStock

us-gaap:PaymentsForRepurchaseOfCommonStock

us-gaap:EffectiveIncomeTaxRateContinuingOperations
us-gaap:AwardType
us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice

us-gaap:UnrecognizedTaxBenefits

us-gaap:DeferredTaxAssetsValuationAllowance

nrg:AccountsReceivableAllowanceForCreditLossAcquiredInAcquisition

nrg:AccountsReceivableAllowanceForCreditLossIncreaseDueFinanceHedgeRisk

nrg:AccountsReceivableAllowanceForCreditLossIncreaseDueToCounterpartyCreditRisk

nrg:AmortizationOfIntangiblesAndOutOfMarketContracts
us-gaap:ConsolidatedEntities

nrg:AssetImpairmentChargesIncludingEquityMethodInvestments
us-gaap:ConsolidatedEntities

nrg:BusinessCombinationAcquisitionAndIntegrationCosts
us-gaap:BusinessAcquisition
nrg:BusinessCombinationProvisionalInformationInitialAccountingIncompleteAdjustmentAccruedExpensesAndOtherCurrentLiabilities
us-gaap:BusinessAcquisition
nrg:BusinessCombinationProvisionalInformationInitialAccountingIncompleteAdjustmentAssets
us-gaap:BusinessAcquisition
nrg:BusinessCombinationProvisionalInformationInitialAccountingIncompleteAdjustmentAssetsAcquiredLiabilitiesAssumedNet
us-gaap:BusinessAcquisition
nrg:BusinessCombinationProvisionalInformationInitialAccountingIncompleteAdjustmentDeferredTaxLiability
us-gaap:BusinessAcquisition
nrg:BusinessCombinationProvisionalInformationInitialAccountingIncompleteAdjustmentGoodwill
us-gaap:BusinessAcquisition
nrg:BusinessCombinationProvisionalInformationInitialAccountingIncompleteAdjustmentLiabilities
us-gaap:BusinessAcquisition
nrg:BusinessCombinationProvisionalInformationInitialAccountingIncompleteAdjustmentOtherLiabilitiesNoncurrent
us-gaap:BusinessAcquisition
nrg:BusinessCombinationProvisionalInformationInitialAccountingIncompleteAdjustmentPrepaidExpenseAndOtherAssetsCurrent

nrg:ChangesInCollateralDepositsSupportingEnergyRiskManagementActivities
us-gaap:ConsolidatedEntities

nrg:ChangesInNuclearDecommissioningTrustLiability
us-gaap:ConsolidatedEntities
us-gaap:StatementScenario, us-gaap:SubsequentEventType
nrg:CommonStockAnnualDividendsIncreaseDecreasePercentage

nrg:ContractwithCustomerLiabilityIncreaseForCashPaymentsReceived

nrg:CounterpartyCreditRiskExposurePercentageOfCreditRiskRollOff

nrg:CounterpartyCreditRiskExposurePercentageThreshold

nrg:CreditReserveDecreaseIncreaseInOperatingRevenue

nrg:DerivativeUnrealizedGainsOnOpenPositionsRelatedToTradingActivityNet
us-gaap:ConsolidatedEntities
nrg:EquityInEarningsOfConsolidatedSubsidiaries
us-gaap:ConsolidationItems

nrg:EstimatedCounterpartyCreditRiskExposureToCertainCounterparties
us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FinancialInstrument
nrg:FairValueNetDerivativeAssetLiabilityMeasuredOnRecurringBasisUnobservableInputsReconciliationAcquisition

nrg:GainsLossesOnExtinguishmentOfDebtNonCashPortion
us-gaap:ConsolidatedEntities

nrg:IncreaseInCreditReserveIncreaseInCostOfRevenue
us-gaap:ConsolidatedEntities
nrg:IntercompanyDividendProceedsFinancing
us-gaap:ConsolidationItems
us-gaap:ConsolidatedEntities
nrg:IntercompanyDividendProceedsInvesting
us-gaap:ConsolidationItems

nrg:InvestmentsInProceedsFromSalesOfUnconsolidatedAffiliates
us-gaap:ConsolidatedEntities
us-gaap:CreditFacility, us-gaap:DebtInstrument, us-gaap:SubsequentEventType
nrg:LineOfCreditFacilityIncreaseInBorrowingCapacity
us-gaap:CreditFacility, us-gaap:DebtInstrument
nrg:LineOfCreditFacilityMaximumBorrowingCapacityIncrease
us-gaap:BusinessAcquisition, us-gaap:SubsequentEventType
nrg:NumberOfCustomers
us-gaap:SubsequentEventType
nrg:AssetAcquisition
nrg:PaymentForAssetAcquisition

nrg:PaymentsForProceedsFromIntangibleAssets
us-gaap:ConsolidatedEntities

nrg:ProceedsFromSaleOfAssetsAndSaleOfDiscontinuedOperationsNet

nrg:ReversalPreviouslyRecognizedUnrealizedGainsLossesAcquiredasPartofAcquisitionEconomicHedges

nrg:ReversalPreviouslyRecognizedUnrealizedGainsLossesSettledPositionsEconomicHedges

nrg:ReversalPreviouslyUnrecognizedUnrealizedGainsLossesSettledPositionsTradingActivity

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

nrg:UnrealizedGainLossonDerivativesMarkToMarketTradingActivities
us-gaap:StatementScenario, us-gaap:DisposalGroupClassification, us-gaap:StatementBusinessSegments, us-gaap:SubsequentEventType
nrg:WorkingCapitalAdjustmentsSaleOfBusiness

us-gaap:AccretionExpenseIncludingAssetRetirementObligations
us-gaap:ConsolidatedEntities

us-gaap:AllowanceForDoubtfulAccountsReceivableRecoveries

us-gaap:AllowanceForDoubtfulAccountsReceivableWriteOffs

us-gaap:AmortizationOfFinancingCostsAndDiscounts
us-gaap:ConsolidatedEntities

us-gaap:AmortizationOfPowerContractsEmissionCredits
us-gaap:ConsolidatedEntities

us-gaap:AssetImpairmentCharges
us-gaap:ConsolidatedEntities
us-gaap:ConsolidationItems, us-gaap:StatementBusinessSegments
us-gaap:BusinessAcquisition
us-gaap:BusinessAcquisitionsProFormaNetIncomeLoss
us-gaap:BusinessAcquisition
us-gaap:BusinessAcquisitionsProFormaRevenue

us-gaap:BusinessCombinationAcquisitionRelatedCosts
us-gaap:BusinessAcquisition
us-gaap:BusinessAcquisition, us-gaap:SubsequentEventType
us-gaap:BusinessAcquisition
us-gaap:BusinessCombinationConsiderationTransferred1
us-gaap:BusinessAcquisition, us-gaap:SubsequentEventType
us-gaap:BusinessAcquisition
us-gaap:BusinessCombinationProvisionalInformationInitialAccountingIncompleteAdjustmentConsiderationTransferred
us-gaap:BusinessAcquisition, us-gaap:SubsequentEventType
us-gaap:BusinessAcquisition
us-gaap:BusinessCombinationProvisionalInformationInitialAccountingIncompleteAdjustmentIntangibles
us-gaap:BusinessAcquisition
us-gaap:BusinessCombinationProvisionalInformationInitialAccountingIncompleteAdjustmentPropertyPlantAndEquipment
us-gaap:ConsolidationItems, us-gaap:ProductOrService, us-gaap:StatementBusinessSegments
us-gaap:CapitalizedContractCostAmortization
us-gaap:ProductOrService

us-gaap:ConcentrationRiskCreditRiskFinancialInstrumentMaximumExposure
us-gaap:HedgingDesignation

us-gaap:ContractWithCustomerLiabilityRevenueRecognized
us-gaap:DebtInstrument, us-gaap:LongtermDebtType
us-gaap:DebtInstrumentConvertibleConversionRatio1
us-gaap:DebtInstrument, us-gaap:LongtermDebtType, us-gaap:SubsequentEventType
us-gaap:BusinessAcquisition, us-gaap:SubsequentEventType
us-gaap:DebtInstrumentIncreaseDecreaseForPeriodNet
us-gaap:CreditFacility, us-gaap:DebtInstrument

us-gaap:DebtSecuritiesAvailableForSaleRealizedGain

us-gaap:DebtSecuritiesAvailableForSaleRealizedLoss
us-gaap:RetirementPlanType
us-gaap:DefinedBenefitPlanContributionsByEmployer

us-gaap:DepreciationAmortizationAndAccretionNet
us-gaap:ConsolidatedEntities
us-gaap:DerivativeInstrumentRisk
us-gaap:DerivativeGainOnDerivative

us-gaap:DerivativeInstrumentsNotDesignatedAsHedgingInstrumentsGainLossNet
us-gaap:Position, us-gaap:UnderlyingAssetClass
us-gaap:DerivativeNonmonetaryNotionalAmountEnergyMeasure
us-gaap:Position, us-gaap:UnderlyingAssetClass
us-gaap:DerivativeNonmonetaryNotionalAmountMass
us-gaap:DisposalGroupClassification, us-gaap:IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperations, us-gaap:StatementBusinessSegments
us-gaap:DisposalGroupNotDiscontinuedOperationLossGainOnWriteDown

us-gaap:DividendsCommonStockCash
us-gaap:StatementEquityComponents

us-gaap:EffectOfExchangeRateOnCashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents
us-gaap:ConsolidatedEntities

us-gaap:EquityMethodInvestmentDividendsOrDistributions
us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName, us-gaap:SubsequentEventType
us-gaap:IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperations
us-gaap:EquityMethodInvestmentOtherThanTemporaryImpairment
us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName, us-gaap:StatementBusinessSegments
us-gaap:DisposalGroupClassification, us-gaap:IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperations
us-gaap:ExtinguishmentOfDebtAmount
us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FinancialInstrument
us-gaap:FairValueNetDerivativeAssetLiabilityMeasuredOnRecurringBasisChangeInUnrealizedGainLoss
us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FinancialInstrument
us-gaap:FairValueNetDerivativeAssetLiabilityMeasuredOnRecurringBasisUnobservableInputsReconciliationGainLossIncludedInEarnings
us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FinancialInstrument
us-gaap:FairValueNetDerivativeAssetLiabilityMeasuredOnRecurringBasisUnobservableInputsReconciliationPurchases
us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FinancialInstrument
us-gaap:FairValueNetDerivativeAssetLiabilityMeasuredOnRecurringBasisUnobservableInputsReconciliationTransfersIntoLevel3
us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FinancialInstrument
us-gaap:FairValueNetDerivativeAssetLiabilityMeasuredOnRecurringBasisUnobservableInputsReconciliationTransfersOutOfLevel3

us-gaap:GainLossOnDispositionOfAssets1
us-gaap:ConsolidatedEntities
us-gaap:DisposalGroupClassification, us-gaap:IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperations
us-gaap:GainLossOnSaleOfBusiness

us-gaap:GainLossOnSaleOfOtherAssets
us-gaap:ConsolidatedEntities
us-gaap:StatementBusinessSegments
us-gaap:GoodwillImpairmentLoss

us-gaap:ImpairmentOfInvestments
us-gaap:ConsolidatedEntities
us-gaap:StatementBusinessSegments
us-gaap:ImpairmentOfLongLivedAssetsHeldForUse

us-gaap:IncomeLossFromEquityMethodInvestments
us-gaap:ConsolidatedEntities
us-gaap:ConsolidationItems, us-gaap:StatementBusinessSegments

us-gaap:IncomeLossFromEquityMethodInvestmentsNetOfDividendsOrDistributions
us-gaap:ConsolidatedEntities
us-gaap:ConsolidationItems

us-gaap:IncreaseDecreaseInDerivativeAssetsAndLiabilities
us-gaap:ConsolidatedEntities

us-gaap:IncreaseDecreaseInIncomeTaxes
us-gaap:ConsolidatedEntities

us-gaap:IncrementalCommonSharesAttributableToShareBasedPaymentArrangements
us-gaap:BusinessAcquisition
us-gaap:LineOfCreditFacilityIncreaseDecreaseForPeriodNet
us-gaap:SubsequentEventType
us-gaap:LitigationSettlementAmountAwardedToOtherParty

us-gaap:NetCashProvidedByUsedInFinancingActivitiesContinuingOperations

us-gaap:NetCashProvidedByUsedInInvestingActivitiesContinuingOperations

us-gaap:NetCashProvidedByUsedInOperatingActivitiesContinuingOperations

us-gaap:OperatingLeaseLeaseIncome
us-gaap:ConsolidationItems, us-gaap:StatementBusinessSegments

us-gaap:OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentNetOfTax
us-gaap:ConsolidatedEntities
us-gaap:ConsolidationItems

us-gaap:PaymentsForRepurchaseOfPreferredStockAndPreferenceStock
us-gaap:ConsolidatedEntities

us-gaap:PaymentsOfDebtIssuanceCosts
us-gaap:ConsolidatedEntities

us-gaap:PaymentsOfDividendsPreferredStockAndPreferenceStock
us-gaap:ConsolidatedEntities

us-gaap:PaymentsToAcquireAvailableForSaleSecuritiesDebt
us-gaap:ConsolidatedEntities
us-gaap:BusinessAcquisition
us-gaap:PaymentsToAcquireBusinessesGross
us-gaap:BusinessAcquisition, us-gaap:SubsequentEventType

us-gaap:PaymentsToAcquireBusinessesNetOfCashAcquired
us-gaap:DisposalGroupClassification, us-gaap:IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperations
us-gaap:ProceedsFromDivestitureOfBusinesses
us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName
us-gaap:StatementScenario, us-gaap:DisposalGroupClassification, us-gaap:StatementBusinessSegments, us-gaap:SubsequentEventType
us-gaap:StatementScenario, us-gaap:StatementBusinessSegments, us-gaap:SubsequentEventType

us-gaap:ProceedsFromIssuanceOfCommonStock
us-gaap:ConsolidatedEntities

us-gaap:ProceedsFromIssuanceOfDebt
us-gaap:ConsolidatedEntities

us-gaap:ProceedsFromLinesOfCredit
us-gaap:BusinessAcquisition
us-gaap:ProceedsFromLongTermLinesOfCredit
us-gaap:BusinessAcquisition, us-gaap:SubsequentEventType

us-gaap:ProceedsFromPaymentsForOtherFinancingActivities
us-gaap:ConsolidatedEntities

us-gaap:ProceedsFromPaymentsToMinorityShareholders
us-gaap:ConsolidatedEntities

us-gaap:ProceedsFromSaleOfAvailableForSaleSecuritiesDebt
us-gaap:ConsolidatedEntities

us-gaap:ProceedsFromSaleOfOtherProductiveAssets
us-gaap:ConsolidatedEntities

us-gaap:ProceedsFromSalesOfAssetsInvestingActivities

us-gaap:ProvisionForDoubtfulAccounts
us-gaap:ConsolidatedEntities

us-gaap:RepaymentsOfLinesOfCredit
us-gaap:ConsolidatedEntities

us-gaap:RepaymentsOfOtherDebt
us-gaap:ConsolidatedEntities

us-gaap:RestructuringCosts
us-gaap:ConsolidatedEntities

us-gaap:RevenueFromRelatedParties
us-gaap:RelatedPartyTransactionsByRelatedParty

us-gaap:SharesPaidForTaxWithholdingForShareBasedCompensation

us-gaap:StockIssuedDuringPeriodValueEmployeeStockPurchasePlan
us-gaap:StatementEquityComponents
nrg:CapitalAllocationPlan
us-gaap:StockRepurchasedDuringPeriodValue
nrg:CapitalAllocationPlan
us-gaap:TreasuryStockAcquiredAverageCostPerShare

us-gaap:UnrealizedGainLossOnCashFlowHedgingInstruments

us-gaap:UnrealizedGainLossOnDerivatives
us-gaap:ConsolidationItems, us-gaap:ProductOrService
us-gaap:ConsolidationItems, us-gaap:ProductOrService, us-gaap:StatementBusinessSegments
us-gaap:DerivativeInstrumentRisk
us-gaap:DerivativeInstrumentRisk, us-gaap:IncomeStatementLocation
us-gaap:ProductOrService

nrg:AdditionalMutualLostRevenueInsuranceWeeklyMaximum
us-gaap:LossContingenciesByNatureOfContingency

nrg:AmountOfCreditExposureToSignificantPortionOfAllCounterparties
us-gaap:BusinessAcquisition
nrg:BusinessAcquisitionCustomersAcquired
us-gaap:BusinessAcquisition
nrg:BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedAccruedExpensesAndOtherCurrentLiabilities
us-gaap:BusinessAcquisition
nrg:BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentAssetsCashCollateralDeposits
us-gaap:BusinessAcquisition
nrg:BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentLiabilitiesCollateralFundsDepositsReceived
us-gaap:BusinessAcquisition
nrg:BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedDerivativeAssetsCurrent
us-gaap:BusinessAcquisition
nrg:BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedDerivativeAssetsNoncurrent
us-gaap:BusinessAcquisition
nrg:BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedDerivativeLiabilityCurrent
us-gaap:BusinessAcquisition
nrg:BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedDerivativeLiabilityNoncurrent
us-gaap:BusinessAcquisition
nrg:BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedFundsDepositedByCounterparties
us-gaap:BusinessAcquisition, us-gaap:SubsequentEventType
nrg:BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedIntangibleAssetsAndGoodwill
us-gaap:BusinessAcquisition
nrg:BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedRestrictedCash

nrg:CapitalExpenditures
us-gaap:ConsolidationItems
us-gaap:ConsolidationItems, us-gaap:StatementBusinessSegments

nrg:CollateralHeldCashAndLettersOfCredit

nrg:CreditDerivativeMaximumNetExposurePercentage
nrg:CounterpartyRiskByInstitution
nrg:CounterpartyRiskByInvestmentGrade

nrg:DeferredTaxAssetNetOfDeferredTaxLiability

nrg:DeferredTaxAssetsFederalBenefitOnStateUnrecognizedTaxBenefits

nrg:DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsDeferredCompensationAccruedVacationAndOtherReserves

nrg:DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsPensionsAndOtherPostretirementBenefits

nrg:DeferredTaxLiabilitiesEmissionsAllowances
us-gaap:JointlyOwnedUtilityPlant
nrg:DefinedBenefitObligationReimbursementOfContributionToAffiliatesInNextFiscalYear

nrg:DerivativeAssetFairValueAmountOffsetAgainstCollateralNetOfDerivativeLiabilityFairValueAmountOffsetAgainstCollateral
us-gaap:DerivativeInstrumentRisk

nrg:DerivativeAssetFairValueDeterminedUsingValuationTechniquesPercentage
nrg:DerivativesByUnderlyingAssets, us-gaap:Range, us-gaap:DerivativeInstrumentRisk, us-gaap:FairValueByFairValueHierarchyLevel
nrg:DerivativeAuctionPrice
nrg:DerivativesByUnderlyingAssets, us-gaap:Range, us-gaap:DerivativeInstrumentRisk, us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FairValueByMeasurementFrequency

nrg:DerivativeCollateralObligationToReturnCashNetOfDerivativeCollateralRightToReclaimCash
us-gaap:DerivativeInstrumentRisk

nrg:DerivativeLiabilityFairValueDeterminedUsingValuationTechniquesPercentage
us-gaap:Position, us-gaap:UnderlyingAssetClass
nrg:DerivativeNonmonetaryNotionalAmountOther

nrg:FairValueofGrossDerivativeAssetsLiabilitiesNet
us-gaap:DerivativeInstrumentRisk

nrg:FortyFourPercentMaximumAssessment

nrg:FundsDepositedByCounterparties
us-gaap:ConsolidatedEntities

nrg:GuaranteeMaturityBetweenOneToThreeYears
us-gaap:GuaranteeObligationsByNature

nrg:GuaranteeMaturityBetweenThreeToFiveYears
us-gaap:GuaranteeObligationsByNature

nrg:GuaranteeMaturityGreaterThanFiveYears
us-gaap:GuaranteeObligationsByNature

nrg:GuaranteeMaturityLessThanOneYear
us-gaap:GuaranteeObligationsByNature

nrg:GuaranteeObligationsEstimatedExposure
us-gaap:GuaranteeObligationsByNature

nrg:MutualLostRevenueInsuranceMaximumWeeklyRecovery
us-gaap:LossContingenciesByNatureOfContingency

nrg:MutualPropertyInsuranceAdditionalBlanketPolicyPropertyCoverage

nrg:MutualPropertyInsuranceIndividualMaximumPropertyCoverageLimit
us-gaap:LossContingenciesByNatureOfContingency
nrg:MutualPropertyInsuranceTotalPropertyCoverage
us-gaap:ConsolidatedEntities
nrg:NetAssetsLessNoncontrollingInterest

nrg:NetCounterpartyCreditRiskExposureToCertainCounterpartiesAmount

nrg:NetCreditExposure

nrg:NetDeferredTaxAssetBeforeValuationAllowance

nrg:NuclearDecommissioningTrustFundLiabilityNoncurrent
us-gaap:ConsolidatedEntities

nrg:NuclearInsuranceFinancialProtectionPoolMaximumAnnualAssessment

nrg:NuclearInsuranceFinancialProtectionPoolMaximumAssessment

nrg:NuclearInsuranceFinancialProtectionPoolMaximumAssessmentAdministrativeFeeAsAPercent

nrg:NuclearInsuranceFinancialProtectionPoolNuclearOperatorMaximumAnnualAssessment

nrg:NuclearInsuranceFinancialProtectionPoolNuclearOperatorTotalAssessment

nrg:NuclearInsuranceFinancialProtectionPoolValue

nrg:NuclearInsurancePerIncidentCoverageLimit

nrg:NuclearInsuranceRequirementPerSite
us-gaap:DisposalGroupClassification
nrg:OtherAssetsNoncurrentEmissionAllowances

nrg:PowerGenerationCapacityMegawatts

nrg:PutOptionAgreementCovenantMandatoryExerciseOfIssuanceRightConsolidatedStockholdersEquityMinimum
us-gaap:AwardType
nrg:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedAggregateIntrinsicValue
us-gaap:AwardType
nrg:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedWeightedAverageGrantDateFairValue
us-gaap:UnrecordedUnconditionalPurchaseObligationByCategoryOfItemPurchased
nrg:ThirdPartyBondObligation

us-gaap:AccountsReceivableNet
us-gaap:AccountsNotesLoansAndFinancingReceivableByReceivableType

us-gaap:AccumulatedOtherComprehensiveIncomeLossForeignCurrencyTranslationAdjustmentNetOfTax

us-gaap:AdditionalCollateralAggregateFairValue

us-gaap:AllowanceForDoubtfulAccountsReceivable

us-gaap:AssetRetirementObligation
nrg:AssetRetirementObligations

us-gaap:AssetsFairValueDisclosure
us-gaap:FairValueByFairValueHierarchyLevel
us-gaap:ConsolidatedEntities
us-gaap:AssetsNet
us-gaap:DisposalGroupClassification, us-gaap:StatementBusinessSegments
us-gaap:AssetsOfDisposalGroupIncludingDiscontinuedOperationCurrent

us-gaap:AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedGainBeforeTax
us-gaap:FinancialInstrument

us-gaap:AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedLossBeforeTax
us-gaap:FinancialInstrument

us-gaap:AvailableForSaleSecuritiesDebtSecurities
us-gaap:FairValueByFairValueHierarchyLevel

us-gaap:BusinessAcquisitionPurchasePriceAllocationGoodwillExpectedTaxDeductibleAmount
us-gaap:BusinessAcquisition
us-gaap:BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedAssets
us-gaap:BusinessAcquisition, us-gaap:SubsequentEventType
us-gaap:BusinessAcquisition
us-gaap:BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCashAndEquivalents
us-gaap:BusinessAcquisition, us-gaap:SubsequentEventType
us-gaap:BusinessAcquisition
us-gaap:BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentAssets
us-gaap:BusinessAcquisition, us-gaap:SubsequentEventType
us-gaap:BusinessAcquisition
us-gaap:BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentAssetsOther
us-gaap:BusinessAcquisition
us-gaap:BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentAssetsReceivables
us-gaap:BusinessAcquisition
us-gaap:BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentLiabilities
us-gaap:BusinessAcquisition, us-gaap:SubsequentEventType
us-gaap:BusinessAcquisition
us-gaap:BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentLiabilitiesAccountsPayable
us-gaap:BusinessAcquisition
us-gaap:BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedDeferredTaxLiabilities
us-gaap:BusinessAcquisition
us-gaap:BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedIntangibleAssetsOtherThanGoodwill
us-gaap:BusinessAcquisition, us-gaap:FiniteLivedIntangibleAssetsByMajorClass
us-gaap:BusinessAcquisition
us-gaap:BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedInventory
us-gaap:BusinessAcquisition
us-gaap:BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedLiabilities
us-gaap:BusinessAcquisition, us-gaap:SubsequentEventType
us-gaap:BusinessAcquisition
us-gaap:BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedNoncurrentAssets
us-gaap:BusinessAcquisition
us-gaap:BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedNoncurrentLiabilities
us-gaap:BusinessAcquisition, us-gaap:SubsequentEventType
us-gaap:BusinessAcquisition
us-gaap:BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedNoncurrentLiabilitiesOther
us-gaap:BusinessAcquisition
us-gaap:BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedOtherNoncurrentAssets
us-gaap:BusinessAcquisition, us-gaap:SubsequentEventType
us-gaap:BusinessAcquisition
us-gaap:BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedPropertyPlantAndEquipment
us-gaap:BusinessAcquisition, us-gaap:SubsequentEventType
us-gaap:BusinessAcquisition
us-gaap:BusinessCombinationRecognizedIdentifiableAssetsAcquiredGoodwillAndLiabilitiesAssumedNet
us-gaap:BusinessAcquisition, us-gaap:SubsequentEventType

us-gaap:CapitalizedContractCostNet

us-gaap:CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsIncludingDisposalGroupAndDiscontinuedOperations
us-gaap:ConsolidatedEntities
us-gaap:CreditDerivativesByContractType
us-gaap:CollateralAlreadyPostedAggregateFairValue

us-gaap:ContractWithCustomerLiability
us-gaap:DebtInstrument, us-gaap:LongtermDebtType
us-gaap:DebtInstrumentConvertibleCarryingAmountOfTheEquityComponent
us-gaap:DebtInstrument, us-gaap:LongtermDebtType
us-gaap:DebtInstrumentConvertibleConversionPrice1
us-gaap:DebtInstrument, us-gaap:LongtermDebtType, us-gaap:SubsequentEventType
us-gaap:DebtInstrument
us-gaap:DebtInstrumentFaceAmount
us-gaap:FairValueByFairValueHierarchyLevel
us-gaap:DebtInstrumentFairValue
us-gaap:DebtInstrument, us-gaap:LongtermDebtType
us-gaap:DebtInstrumentInterestRateEffectivePercentage

us-gaap:DebtInstrumentUnamortizedDiscountPremiumNet
us-gaap:DebtInstrument, us-gaap:LongtermDebtType
us-gaap:DebtInstrument, us-gaap:LongtermDebtType
us-gaap:DebtWeightedAverageInterestRate
us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FinancialInstrument
us-gaap:DecommissioningFundInvestments
us-gaap:FinancialInstrument

us-gaap:DecommissioningLiabilityNoncurrent
us-gaap:ConsolidatedEntities

us-gaap:DecommissioningTrustAssetsAmount
us-gaap:ConsolidatedEntities
us-gaap:FinancialInstrument

us-gaap:DeferredFinanceCostsNet

us-gaap:DeferredIncomeTaxAssetsNet
us-gaap:ConsolidatedEntities

us-gaap:DeferredIncomeTaxLiabilities

us-gaap:DeferredTaxAssetInterestCarryforward

us-gaap:DeferredTaxAssetsDerivativeInstruments

us-gaap:DeferredTaxAssetsGross

us-gaap:DeferredTaxAssetsInventory

us-gaap:DeferredTaxAssetsOperatingLossCarryforwardsDomestic

us-gaap:DeferredTaxAssetsOperatingLossCarryforwardsForeign

us-gaap:DeferredTaxAssetsOperatingLossCarryforwardsStateAndLocal

us-gaap:DeferredTaxAssetsOther

us-gaap:DeferredTaxAssetsPropertyPlantAndEquipment

us-gaap:DeferredTaxAssetsTaxCreditCarryforwards

us-gaap:DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsShareBasedCompensationCost

us-gaap:DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsAllowanceForDoubtfulAccounts

us-gaap:DeferredTaxLiabilitiesDeferredExpenseDeferredFinancingCosts

us-gaap:DeferredTaxLiabilitiesGoodwillAndIntangibleAssetsGoodwill

us-gaap:DeferredTaxLiabilitiesGoodwillAndIntangibleAssetsIntangibleAssets

us-gaap:DeferredTaxLiabilitiesInvestmentInNoncontrolledAffiliates
us-gaap:RetirementPlanType
us-gaap:DefinedBenefitPlanAccumulatedBenefitObligation
us-gaap:RetirementPlanType
us-gaap:DefinedBenefitPlanAccumulatedOtherComprehensiveIncomeBeforeTax
us-gaap:RetirementPlanType
us-gaap:DefinedBenefitPlanAccumulatedOtherComprehensiveIncomeNetGainsLossesBeforeTax
us-gaap:RetirementPlanType
us-gaap:DefinedBenefitPlanAccumulatedOtherComprehensiveIncomeNetPriorServiceCostCreditBeforeTax
us-gaap:RetirementPlanType
us-gaap:DefinedBenefitPlanAssumptionsUsedCalculatingBenefitObligationDiscountRate
us-gaap:RetirementPlanType
us-gaap:DefinedBenefitPlanAssumptionsUsedCalculatingBenefitObligationRateOfCompensationIncrease
us-gaap:RetirementPlanType
us-gaap:DefinedBenefitPlanBenefitObligation
us-gaap:RetirementPlanType
us-gaap:DefinedBenefitPlanExpectedFutureBenefitPaymentsFiveFiscalYearsThereafter
us-gaap:RetirementPlanType
us-gaap:DefinedBenefitPlanExpectedFutureBenefitPaymentsNextTwelveMonths
us-gaap:RetirementPlanType
us-gaap:DefinedBenefitPlanExpectedFutureBenefitPaymentsYearFive
us-gaap:RetirementPlanType
us-gaap:DefinedBenefitPlanExpectedFutureBenefitPaymentsYearFour
us-gaap:RetirementPlanType
us-gaap:DefinedBenefitPlanExpectedFutureBenefitPaymentsYearThree
us-gaap:RetirementPlanType
us-gaap:DefinedBenefitPlanExpectedFutureBenefitPaymentsYearTwo
dei:LegalEntity, us-gaap:RestructuringPlan
us-gaap:DefinedBenefitPlanExpectedFutureEmployerContributionsNextFiscalYear
us-gaap:RetirementPlanType
us-gaap:JointlyOwnedUtilityPlant, us-gaap:RetirementPlanType
us-gaap:DefinedBenefitPlanFundedStatusOfPlan
us-gaap:RetirementPlanType
nrg:AccountType, nrg:GroupofIndividuals, us-gaap:RetirementPlanType
us-gaap:DefinedBenefitPlanHealthCareCostTrendRateAssumedNextFiscalYear
us-gaap:DefinedBenefitPlanByPlanAssetCategories, us-gaap:RetirementPlanType
us-gaap:DefinedBenefitPlanPlanAssetsTargetAllocationPercentage
us-gaap:DerivativeInstrumentRisk
us-gaap:DerivativeAssetFairValueGrossLiability
us-gaap:BusinessAcquisition
us-gaap:DerivativeAssets
us-gaap:BusinessAcquisition, us-gaap:FairValueByFairValueHierarchyLevel

us-gaap:DerivativeCollateralObligationToReturnCash
us-gaap:ConsolidatedEntities
us-gaap:DerivativeInstrumentRisk

us-gaap:DerivativeCollateralRightToReclaimCash
us-gaap:ConsolidatedEntities
nrg:DerivativesByUnderlyingAssets, us-gaap:DerivativeInstrumentRisk, us-gaap:FairValueByFairValueHierarchyLevel
us-gaap:DerivativeFairValueOfDerivativeAsset
nrg:DerivativesByUnderlyingAssets, us-gaap:DerivativeInstrumentRisk, us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FairValueByMeasurementFrequency
us-gaap:DerivativeInstrumentRisk
us-gaap:DerivativeInstrumentRisk, us-gaap:FairValueByFairValueHierarchyLevel
us-gaap:DerivativeInstrumentRisk, us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FairValueByMeasurementFrequency
us-gaap:DerivativeInstrumentRisk, us-gaap:HedgingDesignation
us-gaap:HedgingDesignation
us-gaap:DerivativeInstrumentRisk
us-gaap:DerivativeFairValueOfDerivativeAssetAmountOffsetAgainstCollateral

us-gaap:DerivativeFairValueOfDerivativeLiability
nrg:DerivativesByUnderlyingAssets, us-gaap:DerivativeInstrumentRisk, us-gaap:FairValueByFairValueHierarchyLevel
nrg:DerivativesByUnderlyingAssets, us-gaap:DerivativeInstrumentRisk, us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FairValueByMeasurementFrequency
us-gaap:DerivativeInstrumentRisk
us-gaap:DerivativeInstrumentRisk, us-gaap:FairValueByFairValueHierarchyLevel
us-gaap:DerivativeInstrumentRisk, us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FairValueByMeasurementFrequency
us-gaap:DerivativeInstrumentRisk, us-gaap:HedgingDesignation
us-gaap:FairValueByFairValueHierarchyLevel
us-gaap:HedgingDesignation
us-gaap:DerivativeInstrumentRisk
us-gaap:DerivativeFairValueOfDerivativeLiabilityAmountOffsetAgainstCollateral
nrg:DerivativesByUnderlyingAssets, us-gaap:Range, us-gaap:DerivativeInstrumentRisk, us-gaap:FairValueByFairValueHierarchyLevel
us-gaap:DerivativeForwardPrice
nrg:DerivativesByUnderlyingAssets, us-gaap:Range, us-gaap:DerivativeInstrumentRisk, us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FairValueByMeasurementFrequency

us-gaap:DerivativeInstrumentsAndHedges
us-gaap:ConsolidatedEntities
us-gaap:ConsolidationItems

us-gaap:DerivativeInstrumentsAndHedgesNoncurrent
us-gaap:ConsolidatedEntities
us-gaap:ConsolidationItems
us-gaap:BusinessAcquisition
us-gaap:DerivativeLiabilities
us-gaap:BusinessAcquisition, us-gaap:FairValueByFairValueHierarchyLevel

us-gaap:DerivativeLiabilitiesCurrent
us-gaap:ConsolidatedEntities
us-gaap:ConsolidationItems

us-gaap:DerivativeLiabilitiesNoncurrent
us-gaap:ConsolidatedEntities
us-gaap:ConsolidationItems
us-gaap:DerivativeInstrumentRisk
us-gaap:DerivativeLiabilityFairValueGrossAsset

us-gaap:DerivativeNetLiabilityPositionAggregateFairValue
us-gaap:DerivativeInstrumentRisk
us-gaap:DerivativeNotionalAmount
us-gaap:DerivativeInstrumentRisk, us-gaap:SubsequentEventType
us-gaap:FinancialInstrument
us-gaap:Position, us-gaap:UnderlyingAssetClass
us-gaap:DisposalGroupClassification, us-gaap:StatementBusinessSegments
us-gaap:DisposalGroupIncludingDiscontinuedOperationAssetsNoncurrent
us-gaap:DisposalGroupClassification, us-gaap:IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperations
us-gaap:DisposalGroupIncludingDiscontinuedOperationCash
us-gaap:DisposalGroupClassification, us-gaap:IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperations, us-gaap:StatementBusinessSegments
us-gaap:DisposalGroupIncludingDiscontinuedOperationOtherNoncurrentAssets
us-gaap:DisposalGroupClassification, us-gaap:IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperations, us-gaap:StatementBusinessSegments
us-gaap:DisposalGroupIncludingDiscontinuedOperationOtherNoncurrentLiabilities
us-gaap:DisposalGroupClassification, us-gaap:StatementBusinessSegments
us-gaap:DisposalGroupIncludingDiscontinuedOperationPropertyPlantAndEquipment

us-gaap:EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized
us-gaap:AwardType

us-gaap:EnergyRelatedInventoryCoal

us-gaap:EnergyRelatedInventoryNaturalGasInStorage

us-gaap:EnergyRelatedInventoryPetroleum

us-gaap:EquityMethodInvestmentDifferenceBetweenCarryingAmountAndUnderlyingEquity
us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName
us-gaap:EquityMethodInvestmentOwnershipPercentage

us-gaap:EquityMethodInvestments
us-gaap:ConsolidatedEntities
us-gaap:ConsolidationItems, us-gaap:StatementBusinessSegments
us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName
us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FinancialInstrument
us-gaap:FairValueNetDerivativeAssetLiabilityMeasuredOnRecurringBasisWithUnobservableInputs

us-gaap:FinanceLeaseLiability

us-gaap:FinanceLeaseWeightedAverageDiscountRatePercent

us-gaap:FiniteLivedIntangibleAssetsAccumulatedAmortization
us-gaap:FiniteLivedIntangibleAssetsByMajorClass

us-gaap:FiniteLivedIntangibleAssetsAmortizationExpenseNextTwelveMonths
us-gaap:FiniteLivedIntangibleAssetsByMajorClass

us-gaap:FiniteLivedIntangibleAssetsAmortizationExpenseYearFive
us-gaap:FiniteLivedIntangibleAssetsByMajorClass

us-gaap:FiniteLivedIntangibleAssetsAmortizationExpenseYearFour
us-gaap:FiniteLivedIntangibleAssetsByMajorClass

us-gaap:FiniteLivedIntangibleAssetsAmortizationExpenseYearThree
us-gaap:FiniteLivedIntangibleAssetsByMajorClass

us-gaap:FiniteLivedIntangibleAssetsAmortizationExpenseYearTwo
us-gaap:FiniteLivedIntangibleAssetsByMajorClass

us-gaap:FiniteLivedIntangibleAssetsGross
us-gaap:FiniteLivedIntangibleAssetsByMajorClass
us-gaap:GuaranteeObligationsByNature
us-gaap:GuaranteeObligationsCurrentCarryingValue

us-gaap:IncomeTaxReceivable
us-gaap:FinancialInstrument
us-gaap:InvestmentsFairValueDisclosure
us-gaap:JointlyOwnedUtilityPlant
us-gaap:JointlyOwnedUtilityPlantGrossOwnershipAmountOfPlantInService
us-gaap:JointlyOwnedUtilityPlant
us-gaap:JointlyOwnedUtilityPlantOwnershipAmountOfConstructionWorkInProgress
us-gaap:JointlyOwnedUtilityPlant
us-gaap:JointlyOwnedUtilityPlantOwnershipAmountOfPlantAccumulatedDepreciation
us-gaap:JointlyOwnedUtilityPlant
us-gaap:JointlyOwnedUtilityPlantProportionateOwnershipShare

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueNextTwelveMonths
us-gaap:CreditFacility, us-gaap:DebtInstrument
us-gaap:LettersOfCreditOutstandingAmount
us-gaap:CreditFacility, us-gaap:DebtInstrument, us-gaap:LongtermDebtType
us-gaap:DebtInstrument

us-gaap:LiabilitiesFairValueDisclosure
us-gaap:FairValueByFairValueHierarchyLevel
us-gaap:DisposalGroupClassification, us-gaap:StatementBusinessSegments
us-gaap:LiabilitiesOfDisposalGroupIncludingDiscontinuedOperation
us-gaap:DisposalGroupClassification, us-gaap:StatementBusinessSegments
us-gaap:LiabilitiesOfDisposalGroupIncludingDiscontinuedOperationCurrent
us-gaap:DisposalGroupClassification, us-gaap:StatementBusinessSegments
us-gaap:LiabilitiesOfDisposalGroupIncludingDiscontinuedOperationNoncurrent

us-gaap:LiabilityForUncertainTaxPositionsNoncurrent
us-gaap:CreditFacility, us-gaap:DebtInstrument
us-gaap:LineOfCreditFacilityMaximumBorrowingCapacity
us-gaap:CreditFacility, us-gaap:DebtInstrument, us-gaap:SubsequentEventType
us-gaap:DebtInstrument
us-gaap:LinesOfCreditCurrent

us-gaap:LongTermDebtAndCapitalLeaseObligationsCurrent

us-gaap:LongTermDebtMaturitiesRepaymentsOfPrincipalAfterYearFive

us-gaap:LongTermDebtMaturitiesRepaymentsOfPrincipalInNextTwelveMonths

us-gaap:LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFive

us-gaap:LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFour

us-gaap:LongTermDebtMaturitiesRepaymentsOfPrincipalInYearThree

us-gaap:LongTermDebtMaturitiesRepaymentsOfPrincipalInYearTwo
us-gaap:FairValueByMeasurementBasis
us-gaap:NotesReceivableGross
us-gaap:StatementGeographical, us-gaap:BusinessAcquisition, us-gaap:SubsequentEventType
us-gaap:NumberOfStatesInWhichEntityOperates

us-gaap:OperatingLeaseWeightedAverageDiscountRatePercent
us-gaap:IncomeTaxAuthority
us-gaap:OperatingLossCarryforwards

us-gaap:OtherInventoriesSpareParts
us-gaap:RetirementPlanType
us-gaap:PensionAndOtherPostretirementDefinedBenefitPlansCurrentLiabilities
us-gaap:RetirementPlanType
us-gaap:PrescriptionDrugSubsidyReceiptsAfterYearFive

us-gaap:PublicUtilitiesPropertyPlantAndEquipmentAccumulatedDepreciation

us-gaap:PublicUtilitiesPropertyPlantAndEquipmentNet

us-gaap:PublicUtilitiesPropertyPlantAndEquipmentPlantInService
us-gaap:PropertyPlantAndEquipmentByType

us-gaap:RegulatedEntityOtherAssetsNoncurrent
us-gaap:ConsolidatedEntities
us-gaap:ConsolidationItems

us-gaap:RestrictedCashAndCashEquivalentsAtCarryingValue
us-gaap:ConsolidatedEntities
us-gaap:RestructuringPlan, us-gaap:StatementScenario
us-gaap:RestructuringAndRelatedCostExpectedCost1
us-gaap:RestructuringPlan, us-gaap:SubsequentEventType

us-gaap:RetainedEarningsUndistributedEarningsFromEquityMethodInvestees

us-gaap:RevenueRemainingPerformanceObligation
us-gaap:AwardType
us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue
us-gaap:AwardType
us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableWeightedAverageExercisePrice
us-gaap:AwardType
us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingIntrinsicValue
us-gaap:AwardType
us-gaap:SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsExercisableIntrinsicValue1

us-gaap:UnbilledContractsReceivable

us-gaap:UnrecognizedTaxBenefitsIncomeTaxPenaltiesAndInterestAccrued
us-gaap:BusinessAcquisition, us-gaap:LongTermPurchaseCommitmentByCategoryOfItemPurchased
us-gaap:UnrecordedUnconditionalPurchaseObligationBalanceOnFifthAnniversary
us-gaap:LongTermPurchaseCommitmentByCategoryOfItemPurchased
us-gaap:BusinessAcquisition, us-gaap:LongTermPurchaseCommitmentByCategoryOfItemPurchased
us-gaap:UnrecordedUnconditionalPurchaseObligationBalanceOnFirstAnniversary
us-gaap:LongTermPurchaseCommitmentByCategoryOfItemPurchased
us-gaap:BusinessAcquisition, us-gaap:LongTermPurchaseCommitmentByCategoryOfItemPurchased
us-gaap:UnrecordedUnconditionalPurchaseObligationBalanceOnFourthAnniversary
us-gaap:LongTermPurchaseCommitmentByCategoryOfItemPurchased
us-gaap:BusinessAcquisition, us-gaap:LongTermPurchaseCommitmentByCategoryOfItemPurchased
us-gaap:UnrecordedUnconditionalPurchaseObligationBalanceOnSecondAnniversary
us-gaap:LongTermPurchaseCommitmentByCategoryOfItemPurchased
us-gaap:BusinessAcquisition, us-gaap:LongTermPurchaseCommitmentByCategoryOfItemPurchased
us-gaap:UnrecordedUnconditionalPurchaseObligationBalanceOnThirdAnniversary
us-gaap:LongTermPurchaseCommitmentByCategoryOfItemPurchased
us-gaap:BusinessAcquisition, us-gaap:LongTermPurchaseCommitmentByCategoryOfItemPurchased
us-gaap:UnrecordedUnconditionalPurchaseObligationBalanceSheetAmount
us-gaap:LongTermPurchaseCommitmentByCategoryOfItemPurchased
us-gaap:BusinessAcquisition, us-gaap:LongTermPurchaseCommitmentByCategoryOfItemPurchased
us-gaap:UnrecordedUnconditionalPurchaseObligationDueAfterFiveYears
us-gaap:LongTermPurchaseCommitmentByCategoryOfItemPurchased
us-gaap:ValuationAllowancesAndReservesType
us-gaap:ValuationAllowancesAndReservesBalance

Plots across concepts


IncomeStatement
Comprehensive Income Net Of Tax
Expenses
Research And Development Expense
Balance Sheet
Operating Lease Right Of Use Asset
Assets
Operating Lease Right Of Use Asset
Current Assets
Cash And Cash Equivalents At Carrying Value
NonCurrent Assets
Operating Lease Right Of Use Asset
PropertyPlantAndEquipmentNet
Accumulated Depreciation Depletion And Amortization Property Plant And Equipment
Liabilities
Operating Lease Liability
Current Liabilities
Accrued Income Taxes Current
Noncurrent Liabilities
Deferred Income Tax Liabilities Net
Stockholders Equity
Retained Earnings Accumulated Deficit
CashFlow
Net Cash Provided By Used In Financing Activities
NetCashProvidedByUsedInOperatingActivities
Share Based Compensation
NetCashProvidedByUsedInInvestingActivities
Net Cash Provided By Used In Investing Activities
NetCashProvidedByUsedInFinancingActivities
Net Cash Provided By Used In Financing Activities
Shares
Weighted Average Number Of Diluted Shares Outstanding
DividendsAndRepurchase
Payments For Repurchase Of Common Stock
OperatingLeaseLiability
Operating Lease Liability Current
NonoperatingIncomeExpense
Nonoperating Income Expense
LesseeOperatingLeaseLiabilityPaymentsDue
Lessee Operating Lease Liability Undiscounted Excess Amount
FiniteLivedIntangibleAssets
Finite Lived Intangible Assets Accumulated Amortization

Tables

  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312009-09-302009-06-302009-03-31
us-gaap:CommonStockValue ███████████████████████████████████▁▁▁▁▁▁▁▁4.04.04.04.04.04.04.04.04.04.04.04.04.04.04.04.04.04.04.04.04.04.04.04.04.04.04.04.04.04.04.04.04.04.04.03.03.03.03.03.03.03.03.0NANANA3.0NANANA
us-gaap:WeightedAverageNumberOfDilutedSharesOutstanding ▄▄245.0245.0NA245.0246.0249.0253.0256.0267.0280.0289.0299.0314.0322.0317.0322.0316.0316.0316.0317.0315.0315.0315.0332.0333.0336.0342.0343.0337.0324.0323.0327.0327.0323.0249.0228.0229.0228.0229.0240.0244.0247.0248.0253.0256.0257.0244.0272.0275.0275.0
us-gaap:WeightedAverageNumberOfSharesOutstandingBasic ▄▄245.0245.0NA244.0245.0248.0251.0254.0265.0278.0289.0299.0310.0318.0317.0317.0316.0316.0316.0316.0315.0315.0315.0331.0333.0336.0338.0338.0337.0324.0323.0323.0323.0323.0247.0228.0228.0228.0229.0240.0243.0247.0248.0252.0255.0254.0242.0249.0253.0237.0
us-gaap:AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount NA1.0NANANANANANANANANA16.00.01.0NA1.06.06.0NA2.03.020.0NA19.023.023.0NA17.024.024.0NA18.018.029.0NA27.025.025.0NA23.023.023.0NA22.022.022.0NANANANA
us-gaap:EarningsPerShareBasic ▆▅▅▅▅▅█▅▅▆▅▅▅▅▄▅▅▅▅▅▅▅▁▅▅▅▅▅▅▅▅▅▅▅▆▅▅▅▅▅▆▅▅▅▅▅▅▅▆▅4.4-0.33-0.69999999999999971.021.280.4913.481.460.761.73-0.04-0.240.230.88-4.840.54-1.98-0.52-3.131.27-0.610.24-20.080.18-0.06-0.370.210.49-0.3-0.18-0.90.380.39-1.022.08-0.011.09-0.92-0.48-0.242.54-1.06-0.070.880.820.220.111.091.680.78
us-gaap:EarningsPerShareDiluted ▆▅▅▅▅▅█▆▅▆▅▅▅▅▄▅▅▅▅▅▅▅▁▅▅▅▅▅▅▅▅▅▅▅▆▅▅▅▅▅▆▅▅▅▅▅▅▅▆▅4.4-0.33-0.70000000000000021.021.270.4913.371.450.751.72-0.04-0.240.230.87-4.840.53-1.98-0.52-3.131.27-0.670.24-20.080.18-0.06-0.370.20.48-0.3-0.18-0.90.370.39-1.032.06-0.011.08-0.92-0.48-0.242.53-1.06-0.070.870.810.220.111.021.560.7
us-gaap:IncomeLossFromContinuingOperationsPerBasicShare NANA-6.999999999999998e-071.02e-061.28e-064.9e-071.324e-051.47e-067.1e-073.4000000000000003e-07-4.2999999999999996e-079.399999999999999e-073.1e-078.8e-07-4.88e-066.3e-073.6e-07-4.1e-07-2.61e-064.3e-07NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:IncomeLossFromContinuingOperationsPerDilutedShare NANA-7.000000000000002e-071.02e-061.2700000000000001e-064.9e-071.3140000000000001e-051.46e-067e-073.4000000000000003e-07-4.1999999999999995e-079.399999999999999e-073.1e-078.7e-07-4.24e-066.1e-073.6e-07-4.1e-07-2.52e-064.3e-07NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312009-09-302009-06-302009-03-31
 Cost Ratio us-gaap:ConsolidatedEntities srt:GuarantorSubsidiariesNANANA2513.02055.01778.01659.02473.02140.01769.01383.02618.02172.01744.01577.02366.0NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
 Cost Ratio us-gaap:ConsolidatedEntities srt:NonGuarantorSubsidiariesNANANA297.0181.0252.0539.0525.0332.0395.0313.0445.0291.0329.0262.0386.0NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
 Cost Ratio us-gaap:ConsolidatedEntities srt:GuarantorSubsidiariesNANANA2513.02055.01778.01659.02473.02140.01769.01383.02618.02172.01744.01577.02366.0NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
 Cost Ratio us-gaap:ConsolidatedEntities srt:NonGuarantorSubsidiariesNANANA297.0181.0252.0539.0525.0332.0395.0313.0445.0291.0329.0262.0386.0NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
 EBT Margin us-gaap:BusinessAcquisition nrg:DirectEnergy2958.0NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
 EBT Margin us-gaap:ConsolidatedEntities srt:GuarantorSubsidiariesNANANA2513.02055.01778.01659.02473.02140.01769.01383.02618.02172.01744.01577.02366.0NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
 EBT Margin us-gaap:ConsolidatedEntities srt:NonGuarantorSubsidiariesNANANA297.0181.0252.0539.0525.0332.0395.0313.0445.0291.0329.0262.0386.0NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
 EBT Margin us-gaap:ConsolidationItems,us-gaap:StatementBusinessSegments us-gaap:OperatingSegments,nrg:EastNANANA693.0566.0539.0NA679.0524.0609.0NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
 EBT Margin us-gaap:ConsolidationItems,us-gaap:StatementBusinessSegments us-gaap:OperatingSegments,nrg:EastSegment▁█2678.03825.0NANA545.0521.0NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
 EBT Margin us-gaap:ConsolidationItems,us-gaap:StatementBusinessSegments us-gaap:OperatingSegments,nrg:TexasSegment▁█2025.03702.0NANA1578.01358.0NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
 EBT Margin us-gaap:ConsolidationItems,us-gaap:StatementBusinessSegments us-gaap:OperatingSegments,nrg:WestAndOtherNANANA122.094.0125.0NA111.0106.093.0NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
 EBT Margin us-gaap:ConsolidationItems,us-gaap:StatementBusinessSegments us-gaap:OperatingSegments,nrg:WestServicesAndOtherSegment▁█537.0565.0NANA115.0143.0NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
 EBT Margin us-gaap:ConsolidationItems,us-gaap:StatementBusinessSegments us-gaap:OperatingSegments,stpr:TXNANANA1992.01578.01358.0NA2208.01837.01466.0NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
 Margin from Continuing Operations us-gaap:ConsolidationItems,us-gaap:StatementBusinessSegments us-gaap:OperatingSegments,nrg:EastNANANA693.0566.0NANA679.0524.0609.0NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
 Margin from Continuing Operations us-gaap:ConsolidationItems,us-gaap:StatementBusinessSegments us-gaap:OperatingSegments,nrg:WestAndOtherNANANA122.094.0NANA111.0106.093.0NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
 Margin from Continuing Operations us-gaap:ConsolidationItems,us-gaap:StatementBusinessSegments us-gaap:OperatingSegments,stpr:TXNANANA1992.01578.0NANA2208.01837.01466.0NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
 Net profit Margin us-gaap:ConsolidatedEntities srt:GuarantorSubsidiariesNANANA2513.02055.0NA1659.02473.02140.01769.01383.02618.02172.01744.01577.02366.0NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
 Net profit Margin us-gaap:ConsolidatedEntities srt:NonGuarantorSubsidiariesNANANA297.0181.0NA539.0525.0332.0395.0313.0445.0291.0329.0262.0386.0NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
 Operating Margin us-gaap:ConsolidatedEntities srt:GuarantorSubsidiariesNANANA2513.02055.01778.01659.02473.02140.01769.01383.02618.02172.01744.01577.02366.0NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
 Operating Margin us-gaap:ConsolidatedEntities srt:NonGuarantorSubsidiariesNANANA297.0181.0252.0539.0525.0332.0395.0313.0445.0291.0329.0262.0386.0NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
 SG&A Ratio us-gaap:ConsolidatedEntities srt:GuarantorSubsidiariesNANANA2513.02055.01778.01659.02473.02140.01769.01383.02618.02172.01744.01577.02366.0NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
 SG&A Ratio us-gaap:ConsolidatedEntities srt:NonGuarantorSubsidiariesNANANA297.0181.0252.0539.0525.0332.0395.0313.0445.0291.0329.0262.0386.0NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312009-09-302009-06-302009-03-31
 TTM Greenblatt ROC _ _█▆▆▇▇▇▆▇▇▇▆▇▇▇▅▇▇▆▅▇▆▇▁▇▇▆▇▇▆▆▆▇▇▆▆▆▇▆▆▆▇▇▆▇▇▇▇1557.0-56.0-16.0393.0484.0244.0209.0540.0320.0221.049.0416.0334.0406.0-1345.0376.0343.047.0-791.0755.087.0476.0-4727.0379.0232.076.0453.0549.089.0180.0-205.0535.0295.0-259.037.086.0397.0-170.09.043.0269.0314.0152.0454.0444.0258.0314.0NANANA
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312009-09-302009-06-302009-03-31
us-gaap:ComprehensiveIncomeNetOfTax NANA-189.0253.0326.0106.03349.0313.0198.0480.0-48.0-73.071.0282.0-1518.0177.0-601.0-153.0-1001.0456.0-268.077.0-6304.066.00.0-124.0-70.0158.0-97.0-47.0-179.0114.0148.0-314.0434.0-52.0163.0-210.0-236.0-159.0563.0-329.0-154.0318.0NANANANANANA
 us-gaap:ComprehensiveIncomeNetOfTax us-gaap:ConsolidatedEntities srt:GuarantorSubsidiariesNANANA499.0586.0256.0289.0543.0388.0256.0137.0304.0207.0329.0-390.0405.0NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
 us-gaap:ComprehensiveIncomeNetOfTax us-gaap:ConsolidatedEntities srt:NonGuarantorSubsidiariesNANANA51.026.0-19.054.0-35.042.055.0-8.0171.0149.0-1.0-513.0193.0NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
 us-gaap:ComprehensiveIncomeNetOfTax us-gaap:ConsolidatedEntities srt:ParentCompanyNANANA253.0326.0106.03349.0313.0198.0480.0-46.0-86.071.0283.0-1518.0178.0NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
 us-gaap:ComprehensiveIncomeNetOfTax us-gaap:ConsolidationItems srt:ConsolidationEliminationsNANANA-550.0-612.0-237.0-343.0-508.0-430.0-311.0-131.0-462.0-356.0-329.0904.0-599.0NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest ▆▆▅▆▆▆█▆▆▆▆▆▆▆▄▆▅▅▅▆▅▆▁▆▆▅▆▆▆▆▅▆▆▅▆▆▆▅▅▅▆▅1099.0-79.0-189.0253.0326.0106.03351.0313.0199.0480.0-49.0-47.097.0244.0-1636.0172.0-618.0-192.0-1048.0454.0-284.025.0-6343.049.012.0-153.0-76.0175.0-85.0-62.0-171.0132.0155.0-313.0436.0-43.0171.0-209.0-236.0-159.0563.0-329.0NANA20.0309.0NANANANA
us-gaap:CostOfRevenue ▃█▁▂▁▁▁▂▂▁▁▂▂▁▂▂▂▂▂▃▂▂▂▃▂▃▃▄▃▃▂▂▂▂▁▂▁▁▂▂▁▁▁▂▁▁2957.06864.01615.02034.01434.01457.01654.02153.01845.01651.01378.02307.02051.01558.01684.02156.01837.02125.01817.02793.01756.02189.02225.03034.02434.03062.02951.03278.02817.02733.01942.02355.02059.01765.01469.01726.01319.01573.01690.02053.01608.01324.01270.01835.01329.01639.0NANANANA
us-gaap:CostsAndExpenses ▃█▁▂▁▁▁▂▂▁▁▂▂▁▃▂▂▂▃▃▂▂█▄▃▃▃▄▃▃▂▂▂▂▁▂▁▁▁▂▁▁▁▂▁▁3686.08164.02040.02416.01754.01781.01991.02456.02146.01945.01684.02659.02602.02017.03837.02687.02402.02714.03323.03463.02468.02785.07754.04052.03165.03764.03739.04020.03532.03325.03023.02955.02634.02340.02026.02245.01769.02032.02123.02631.02009.01681.01664.02231.01689.01980.0NANANANA
us-gaap:DisposalGroupNotDiscontinuedOperationGainLossOnDisposal ▁█0.017.0NA0.00.06.0NA0.01.01.02.014.0NANANANANANANANANANANANANANA0.00.00.019.0NANANANANANANANA0.00.00.0NA0.00.00.023.0NANANANA
 us-gaap:DisposalGroupNotDiscontinuedOperationGainLossOnDisposal us-gaap:ConsolidationItems,us-gaap:StatementBusinessSegments us-gaap:OperatingSegments,nrg:WestAndOtherNANANA0.00.01.0NANA0.00.0NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
 us-gaap:DisposalGroupNotDiscontinuedOperationGainLossOnDisposal us-gaap:ConsolidationItems,us-gaap:StatementBusinessSegments us-gaap:OperatingSegments,nrg:WestServicesAndOtherSegment▁█0.017.0NANA0.01.0NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
 us-gaap:DisposalGroupNotDiscontinuedOperationGainLossOnDisposal us-gaap:ConsolidationItems,us-gaap:StatementBusinessSegments us-gaap:OperatingSegments,us-gaap:CorporateNANANA0.00.05.0NA0.01.00.01.015.0NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
 us-gaap:DisposalGroupNotDiscontinuedOperationGainLossOnDisposal us-gaap:DisposalGroupClassification,us-gaap:IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperations us-gaap:DisposalGroupHeldForSaleOrDisposedOfBySaleNotDiscontinuedOperations,nrg:AguaCalienteSolarProjectNANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:GainsLossesOnExtinguishmentOfDebt NANA-8.00.00.0NA-4.00.0-47.00.0-22.0-19.0-1.0-2.0-50.0-1.00.0-2.0-23.0-50.0-80.011.084.0-2.0-7.00.0-1.0-13.0-40.0-41.00.0-1.0-21.0-28.0-10.0-41.00.00.00.0-32.0-115.0-28.00.0-1.00.0NANANANANA
 us-gaap:GainsLossesOnExtinguishmentOfDebt us-gaap:ConsolidatedEntities srt:ParentCompanyNANANA0.0NANA-1.00.0-47.0NA-22.0-19.0-1.0-2.0NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
 us-gaap:GainsLossesOnExtinguishmentOfDebt us-gaap:DisposalGroupClassification,us-gaap:IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperations us-gaap:DisposalGroupHeldForSaleOrDisposedOfBySaleNotDiscontinuedOperations,nrg:HomeSolarNANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest █▆▆▇▇▇▇▇▇▇▆▇▇▇▅▇▇▆▅▇▆▆▁▇▆▆▇▇▆▆▆▇▆▆▇▆▇▆▆▆▆▆▆▇▇1458.0-167.0-138.0341.0414.0144.0120.0380.0188.098.0-153.0313.0129.0232.0-1665.0196.0103.0-207.0-1134.0442.0-251.068.0-4973.0114.0-26.0-209.0168.0271.0-206.0-98.0-540.0306.076.0-476.0437.0-105.0246.0-326.0-137.0-135.0-9.0-365.0-9.0312.0327.0NANANANANA
us-gaap:IncomeLossFromContinuingOperationsIncludingPortionAttributableToNoncontrollingInterest NANA-173.0249.0313.0121.03463.0374.0189.094.0-93.0306.0121.0233.0-1667.0190.099.0-170.0-891.0128.0-163.0-57.0NANANANANA271.0-206.0-98.0NA298.068.0-483.0NANANANANANANANANANANANANANANANA
 us-gaap:IncomeLossFromContinuingOperationsIncludingPortionAttributableToNoncontrollingInterest us-gaap:ConsolidationItems,us-gaap:StatementBusinessSegments us-gaap:OperatingSegments,nrg:EastNANANA149.0146.0NANA121.060.099.0NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
 us-gaap:IncomeLossFromContinuingOperationsIncludingPortionAttributableToNoncontrollingInterest us-gaap:ConsolidationItems,us-gaap:StatementBusinessSegments us-gaap:OperatingSegments,nrg:WestAndOtherNANANA17.025.0NANA15.018.0-23.0NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
 us-gaap:IncomeLossFromContinuingOperationsIncludingPortionAttributableToNoncontrollingInterest us-gaap:ConsolidationItems,us-gaap:StatementBusinessSegments us-gaap:OperatingSegments,stpr:TXNANANA288.0350.0NANA348.0259.0150.0NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
 us-gaap:IncomeLossFromContinuingOperationsIncludingPortionAttributableToNoncontrollingInterest us-gaap:ConsolidationItems,us-gaap:StatementBusinessSegments us-gaap:OperatingSegments,us-gaap:CorporateNANANA-205.0-209.0NA3243.0-112.0-150.0-104.0-1382.0342.0-139.0-132.0-168.0-162.0-146.0-137.0-132.0-222.0-312.0NANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:IncomeTaxExpenseBenefit ▇▆▆▆▆▆▁▆▆▆▆▆▆▆▆▆▆▆▆▆▆▆█▆▆▆▆▆▆▆▆▆▆▆▆▆▆▆▆▆▅▆▆▆▆▆380.0-85.035.092.0101.023.0-3343.06.0-1.04.0-12.07.08.0-1.03.06.04.0-4.0-79.049.025.021.01385.047.0-17.0-73.071.089.0-126.0-31.0-235.0163.0-61.0-149.0-81.0-113.0-13.0-120.0-28.0-80.0-630.0-105.06.089.0117.065.0NANANANA
us-gaap:InterestExpense ▂▂▁▁▁▁▁▁▁▂▂▂▄▃▄▅▆▇▅▇▇▇▇▇▆██▇▇▆▅▅▅▄▃▃▃▃▃▃▃▄▃▃▃▃125.0127.0109.099.096.098.095.099.0105.0114.0122.0121.0202.0167.0198.0221.0247.0269.0220.0280.0277.0284.0273.0291.0263.0301.0310.0280.0274.0255.0218.0228.0206.0196.0166.0163.0167.0165.0161.0164.0167.0173.0165.0168.0147.0153.0NANANANA
us-gaap:NetIncomeLoss ▆▅▅▆▆▆█▆▆▆▆▆▆▆▄▆▅▅▅▆▅▆▁▆▆▅▆▆▅▆▅▆▆▅▆▆▆▅▅▆▆▅▆▆▆▆▆▆▆▆1078.0-82.0-173.0249.0313.0121.03383.0372.0201.0482.0-12.0-72.072.0279.0-1535.0171.0-626.0-163.0-987.0402.0-271.082.0-6314.066.0-14.0-120.0119.0168.0-97.0-56.0-290.0124.0130.0-328.0516.0-1.0251.0-207.0-109.0-55.0621.0-260.0-15.0223.0211.058.033.0278.0433.0198.0
us-gaap:NetIncomeLossAvailableToCommonStockholdersBasic 1078.0NANANA313.0NA3383.0372.0201.0482.0-11.0-72.072.0279.0-1535.0171.0-626.0-163.0-987.0402.0-193.077.0-6319.061.0-19.0-125.070.0166.0-100.0-58.0-314.0122.0127.0-330.0514.0-3.0248.0-209.0-111.0-57.0618.0-262.0-17.0221.0208.056.0NANANANA
us-gaap:NetIncomeLossAvailableToCommonStockholdersDiluted █▁1078.0-82.0NA249.0313.0121.0NA372.0201.0482.0NA-72.072.0279.0NANANANANANANANANANANANANANANANANANANANA514.0-3.0248.0NA-111.0-57.0618.0-262.0-17.0221.0208.056.0NANANANA
us-gaap:NonoperatingIncomeExpense ▅▅▅▅▅▅▅▄▅▅▄▅▄▄▃▄▄▄▃▃▃▃▄▄▄▄▄▄▃▄▃▄▄▄█▄▄▄▄▄▄▁▄▄▅▅-99.0-111.0-122.0-52.0-70.0-100.0-89.0-160.0-132.0-123.0-154.0-103.0-205.0-174.0-320.0-180.0-240.0-254.0-343.0-313.0-338.0-408.0-246.0-265.0-258.0-285.0-285.0-278.0-295.0-278.0-312.0-229.0-219.0-217.0400.0-191.0-151.0-156.0-146.0-178.0-278.0-679.0-161.0-142.0-117.0-135.0NANANANA
 us-gaap:NonoperatingIncomeExpense us-gaap:ConsolidatedEntities srt:GuarantorSubsidiariesNANANA1.06.01.017.027.03.010.025.07.06.03.0-3.010.0NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
 us-gaap:NonoperatingIncomeExpense us-gaap:ConsolidatedEntities srt:NonGuarantorSubsidiariesNANANA38.015.0-31.0-9.0-74.03.0-24.0-25.020.0-37.0-26.0-159.027.0NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
 us-gaap:NonoperatingIncomeExpense us-gaap:ConsolidatedEntities srt:ParentCompanyNANANA449.0495.0195.0215.0444.0294.0200.0-10.0342.0249.0239.0-858.0352.0NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
 us-gaap:NonoperatingIncomeExpense us-gaap:ConsolidationItems srt:ConsolidationEliminationsNANANA-540.0-586.0-265.0-312.0-557.0-432.0-309.0-144.0-472.0-360.0-333.0781.0-500.0NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:OperatingIncomeLoss █▆▆▇▇▇▆▇▇▇▆▇▇▇▅▇▇▆▅▇▆▇▁▇▇▆▇▇▆▆▆▇▇▆▆▆▇▆▆▆▇▇▆▇▇▇▇▇▇▇1557.0-56.0-16.0393.0484.0244.0209.0540.0320.0221.049.0416.0334.0406.0-1345.0376.0343.047.0-791.0755.087.0476.0-4727.0379.0232.076.0453.0549.089.0180.0-205.0535.0295.0-259.037.086.0397.0-170.09.043.0269.0314.0152.0454.0444.0258.0314.0611.0619.0615.0
us-gaap:OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax ▆▆▇▆█▃▆▅▆▆▅▅▅▅▆▆▆▇▄▆▅▇▆▄▇▄▅▅▅▇▄▇▂▆▆▆▄▇▆▁▇2.03.06.04.013.0-15.03.0-4.0-1.01.0-3.0-2.0-4.0-2.02.02.01.07.0-7.03.0-3.06.0-1.0-8.09.0-11.0-5.0-6.0-3.06.0-10.05.0-19.00.00.01.0-8.06.03.0-27.010.0NANANANANANANANANA
us-gaap:OtherComprehensiveIncomeLossNetOfTax ▅▅▅▅▅▅▄▄▅▅▄▅▅▅▅▅▅▅▅▆▅▄▅▅▅▅▁▅▅▅█▅▅▅▃▄▃▅▂▃▄21.03.0-16.04.013.0-15.0-34.0-59.0-3.0-2.0-36.01.01.011.019.09.024.011.07.061.0-8.0-22.015.0-18.021.0-17.0-173.0-7.0-5.05.0134.0-11.018.014.0-82.0-51.0-88.0-3.0-127.0-104.0-58.0NANANANANANANANANA
us-gaap:OtherNonoperatingIncomeExpense ▆▇▆▆▆█▇▇▇▆▇▇▁▄▅▆▅▆▅▅▅▇▅▅▅▇▅▄▅▆▅▅▄▅▅▅▄▄▅▅▄▅▄▆▇▅12.022.015.011.014.027.017.017.020.012.022.017.0-20.0-3.05.015.010.012.07.09.08.018.06.04.04.019.09.0-3.05.011.04.05.00.04.05.010.02.02.06.05.03.05.0-1.011.019.04.0NANANANA
us-gaap:ProfitLoss ▆▆▅▆▆▆█▆▆▆▆▆▆▆▄▆▅▅▅▆▅▆▁▆▆▅▆▆▆▆▅▆▆▅▆▆▆▅▅▆▆▅▆▆▆▆1078.0-82.0-173.0249.0313.0121.03385.0372.0202.0482.0-13.0-48.096.0233.0-1655.0163.0-642.0-203.0-1055.0393.0-276.047.0-6358.067.0-9.0-136.097.0182.0-80.0-67.0-290.0143.0137.0-327.0518.08.0259.0-206.0-109.0-55.0621.0-260.0-15.0223.0210.058.0NANANANA
us-gaap:ResearchAndDevelopmentExpense NANA2.01.02.03.02.01.02.02.02.01.016.013.018.014.018.017.023.023.018.026.041.038.041.034.029.022.021.019.021.024.021.018.0NANANANANANANANANANANANANANANANA
 us-gaap:ResearchAndDevelopmentExpense us-gaap:ConsolidatedEntities srt:NonGuarantorSubsidiariesNANANA-1.01.00.0-1.00.01.00.01.0-2.01.01.00.01.0NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
 us-gaap:ResearchAndDevelopmentExpense us-gaap:ConsolidatedEntities srt:ParentCompanyNANANA2.01.03.03.01.01.02.01.03.03.04.04.05.0NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax ▅█▁▂▂▁▂▂▁▁▁▁▁▁▂▃▂▂▂▄▂▃▃▄▃▃▄▄▃▃▂▃▂▁▁▂▂▁▂▂▂▁▁▂▂▂▂▂▂▁5236.07929.01957.02684.02124.01925.02195.02504.01783.01779.01992.02075.01928.01823.02497.03049.02701.02759.02532.03952.02638.03229.03011.04431.03397.03826.04192.04569.03621.03486.02795.03490.02929.02081.02063.02331.02166.01862.02132.02674.02278.01995.01816.02685.02133.02215.02141.02916.02237.01658.0
us-gaap:Revenues ▅█▁▂▂▁▂▂▂▂▁▃▂▂▂▃▂▂▂▃▂▃▂▄▃▃▄▄▃▃▂▃▂▁▁▂▂▁▂▂▂▁▁▂▂▂▂▂▂▁5243.08091.02027.02809.02238.02019.02195.02996.02465.02165.01992.03061.02922.02421.02497.03049.02701.02759.02532.03952.02638.03229.03011.04431.03397.03826.04192.04569.03621.03486.02795.03490.02929.02081.02063.02331.02166.01862.02132.02674.02278.01995.01816.02685.02133.02215.02141.02916.02237.01658.0
us-gaap:SellingGeneralAndAdministrativeExpense ▇█▆▅▄▄▄▄▄▃▄▄▄▃▄▄▄▆▇▆▆▅██▇▆▆▅▆▄▅▄▄▄▄▅▄▄▃▂▂▁▂▂▁▁308.0330.0263.0253.0208.0209.0212.0210.0211.0194.0208.0212.0211.0191.0210.0213.0223.0272.0299.0282.0265.0255.0334.0332.0291.0263.0290.0258.0268.0226.0233.0229.0213.0229.0211.0253.0207.0221.0189.0169.0167.0143.0157.0172.0139.0130.0NANANANA
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312009-09-302009-06-302009-03-31
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312009-09-302009-06-302009-03-31
us-gaap:Assets ▄▃▂▂▂▂▂▁▁▁▁▂▄▄▄▅▅▆▆▆▆▆▆█████▇▇▆▇▇▇▇▅▅▅▅▄▅▅▅21619.019241.014902.012225.012337.012822.012531.09527.09171.09530.010628.011450.022947.023752.023318.025470.025205.029420.030355.031491.031422.032680.032882.039988.040365.040330.040665.040069.037629.034961.033902.034863.034492.035371.035128.027220.027856.028530.026715.024760.025336.025043.026896.0NANANA23378.0NANANA
us-gaap:Liabilities ▄▄▂▁▁▁▁▁▁▁▂▂▅▅▅▅▅▇▇▇▇▇▇█████▇▆▆▆▆▇▆▄▅▅▄▃▃▄▄19075.017724.013222.010291.010587.011286.010853.011079.010800.011050.011843.012367.020807.021414.021272.021695.021671.025363.025863.025979.026278.026972.027117.027821.028019.028641.028679.028102.026403.024318.023184.023733.023940.024926.024346.019081.019704.020648.018797.016580.016760.017194.018576.0NANANA15434.0NANANA
us-gaap:LiabilitiesAndStockholdersEquity ▄▃▂▂▂▂▂▁▁▁▁▂▄▄▄▅▅▆▆▆▆▆▆█████▇▇▆▇▇▇▇▅▅▅▅▄▅▅▅21619.019241.014902.012225.012337.012822.012531.09527.09171.09530.010628.011450.022947.023752.023318.025470.025205.029420.030355.031491.031422.032680.032882.039988.040365.040330.040665.040069.037629.034961.033902.034863.034492.035371.035128.027220.027856.028530.026715.024760.025336.025043.026896.0NANANA23378.0NANANA
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312009-09-302009-06-302009-03-31
us-gaap:AssetsCurrent █▅▅▁▁▂▁▁▁▂▂▃▃▃▃▃▃▄▅▆▅▆▆▇▇▇█▇▇█▇▆▆▇▇▅▆█▇▅▅▅▆8624.06552.06028.03087.03076.03479.03088.03187.03045.03458.03600.04285.04753.04557.04415.04760.04469.05440.06395.07014.06364.07346.07391.08073.08010.08122.08582.07872.07757.08383.07596.07249.06943.08031.07956.06383.07255.08458.07597.06338.06039.06378.07137.0NANANA6208.0NANANA
us-gaap:CashAndCashEquivalentsAtCarryingValue ▁▁█▂▁▂▁▁▁▂▂▃▂▂▂▃▂▃▄▅▃▄▃▅▅▅▅▄▃▇▅▅▃▄▅▄▃▂▃▃▄▆▆▇▅▄▅361.0501.03905.0697.0418.0759.0345.0243.0294.0859.0563.01359.0980.0764.0991.01223.0752.01513.01973.02435.01389.01659.01518.02265.02146.02164.02116.01953.01481.03187.02254.02129.01368.01707.02087.01610.01149.01014.01105.01127.01939.02711.02951.03447.02168.01813.02304.0NANANA
us-gaap:AccountsReceivableNetCurrent ▇█▂▂▂▂▂▃▂▂▂▃▃▂▂▃▂▂▂▃▃▂▂▃▃▂▃▄▃▂▃▃▃▂▂▂▂▁▁▂▂▁▁2822.03037.0904.01126.01015.0915.01025.01376.01049.0898.01019.01297.01371.0903.01079.01274.01162.0974.01166.01362.01251.01018.01157.01492.01413.01179.01322.01554.01482.01149.01214.01366.01290.0982.0986.01075.01000.0716.0834.01042.01008.0687.0734.0NANANA876.0NANANA
 us-gaap:ReceivablesNetCurrent us-gaap:ConsolidatedEntities us-gaap:VariableInterestEntityPrimaryBeneficiary▁▃▁█642.0728.0647.0887.0NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:InventoryNet ▁▁▁▁▂▁▂▁▁▂▂▂▂▃▃▃▄▇▇▆▇▇█▇▇▇█▇▆▅▅▅▅▅▆▂▂▂▁▁▂▂▂365.0316.0327.0330.0388.0372.0383.0364.0370.0391.0412.0408.0485.0528.0532.0630.0713.01140.01111.01017.01124.01161.01252.01149.01153.01109.01247.01051.0996.0781.0898.0861.0874.0904.0931.0393.0416.0392.0308.0320.0386.0418.0453.0NANANA541.0NANANA
 us-gaap:OtherAssetsCurrent us-gaap:ConsolidatedEntities us-gaap:VariableInterestEntityPrimaryBeneficiaryNANA2.0NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:PrepaidExpenseAndOtherAssetsCurrent ▅▅▂▂▂▂▁▂▂▂▂▁▃▃▂▃▄▄▄▃▄▄▄▄▅▅▄▅▅▆▅▄▄█▅▁▆▂▂▁▂473.0511.0257.0258.0284.0290.0245.0271.0277.0285.0302.0248.0328.0326.0261.0354.0400.0454.0423.0369.0406.0461.0442.0460.0516.0474.0447.0475.0537.0599.0498.0442.0415.0724.0535.0217.0606.0272.0273.0245.0298.0NA296.0NANANANANANANA
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312009-09-302009-06-302009-03-31
us-gaap:AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment ▅▅▅▅▅▅▅▅▅▅▅▅▆▆▆▇▇▇▁▇▇▇▇████▇▇▇▇▇▇▆▆▆▆▆▆▆▆▆▆1433.01566.01936.01901.01868.01832.01752.01759.01684.01610.01811.02652.04534.04679.04465.06437.06180.06602.0-6314.06424.06107.07093.06804.08969.08611.08261.07890.07584.07230.06888.06573.06264.05959.05680.05417.05194.04976.04768.04570.04371.04170.03987.03796.0NANANA3052.0NANANA
us-gaap:PropertyPlantAndEquipmentNet NANANA2573.02533.02573.02593.02615.02610.02650.03048.03599.012774.013911.013908.015332.015302.017942.017912.018203.018382.018763.018732.021985.022304.022276.022367.022181.021576.019644.019851.020600.020454.020404.020268.015866.015318.014376.013621.012843.012283.011579.012517.0NANANA11564.0NANANA
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 us-gaap:PropertyPlantAndEquipmentNet us-gaap:ConsolidatedEntities srt:NonGuarantorSubsidiariesNANANA1159.01046.01046.0952.0965.0965.0987.0957.01077.0NANA3695.0NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
 us-gaap:PropertyPlantAndEquipmentNet us-gaap:ConsolidatedEntities srt:ParentCompanyNANANA144.0151.0155.0158.0156.0151.0151.0153.0150.0NANA237.0NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
 us-gaap:InvestmentsInAffiliatesSubsidiariesAssociatesAndJointVentures us-gaap:ConsolidatedEntities srt:GuarantorSubsidiariesNANANA28.0170.0158.0710.0786.0436.0477.0446.0477.0NANA266.0NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
 us-gaap:InvestmentsInAffiliatesSubsidiariesAssociatesAndJointVentures us-gaap:ConsolidatedEntities srt:ParentCompanyNANANA4981.04525.05122.04785.04677.04191.03765.04707.04379.0NANA7581.0NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
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us-gaap:Goodwill ▅▅▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▃▃▃▃█████▆▆▆▆▆▆▆▆▆▆▆▆▆▆▆1793.01572.0579.0579.0579.0579.0579.0591.0573.0573.0573.0539.0539.0539.0539.0662.0662.0662.0662.0999.0999.0999.0999.02503.02555.02520.02574.02452.02116.02038.01985.01953.01954.01954.01956.01886.01886.01886.01886.01859.01863.01863.01868.0NANANA1718.0NANANA
 us-gaap:IndefiniteLivedIntangibleAssetsExcludingGoodwill us-gaap:IndefiniteLivedIntangibleAssetsByMajorClass nrg:RenewableEnergyCertificatesNANA28.0NANANA18.0NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:FiniteLivedIntangibleAssetsNet ██▁▁▁▂▂▂▁▁▁▁▅▄▄▅▅▅▅▅▆▆▆▆▆▆▇█▃▃▃▃▃▃▃▃▃▃▃▄▄▄▄2921.03054.0668.0721.0733.0769.0789.0828.0561.0580.0591.0602.01860.01726.01746.01838.01893.01957.02036.02106.02180.02256.02310.02371.02428.02491.02567.02880.01434.01300.01140.01141.01120.01176.01200.01188.01256.01340.01419.01561.01589.01686.01776.0NANANA1777.0NANANA
us-gaap:DeferredTaxAssetsLiabilitiesNet NANA3047.0NANANA3269.0NANANANANANANA113.0NANANA205.0NANANA148.0NANANA1559.0NANANA1438.0NANANA1262.0NANANA-1516.0NANANA-2097.0NANANA-1980.0NANANA
us-gaap:OperatingLeaseRightOfUseAsset ▅▅▅▆▇▇▇███▁307.0312.0301.0345.0429.0446.0464.0482.0499.0517.00.0NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:OtherAssetsNoncurrent ▃▃▁▂▁▁▁▁▁▁▁▁▄▄▃▃▄▇▇▇▇▆▇███▇▇▇614.0625.0216.0314.0212.0225.0240.0252.0271.0255.0289.0281.0655.0681.0629.0644.0659.01172.01179.01198.01239.01151.01214.01426.01405.01404.01244.01281.01307.0NA740.0689.0578.0545.0597.0392.0392.0352.0336.0324.0274.0198.0208.0NANANA148.0NANANA
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312009-09-302009-06-302009-03-31
us-gaap:AccountsPayableCurrent ██▁▂▂▂▂▂▂▂▂▂▃▂▂▂▂▂▂▃▂▂▂▄▃▃▃▃▃▃▃▃▄▃▄▄▄▃▂▃▂▁▂2166.02216.0649.0753.0736.0708.0722.0866.0723.0697.0862.0824.0975.0787.0881.0915.0757.0872.0895.0945.0898.0845.0869.01173.01080.01045.01060.01098.01103.01082.01038.01140.01196.01054.01170.01246.01350.01080.0808.0974.0842.0568.0783.0NANANA693.0NANANA
us-gaap:AccruedIncomeTaxesCurrent NANA12.0NANANANANANANANANANANANANANANANANANANANANANANA16.0NANANA12.0NANANANANANANANANANANANANANANANANANANA
us-gaap:LiabilitiesCurrent █▆▁▁▁▂▂▂▂▁▂▂▃▄▃▃▃▄▄▄▅▄▄▄▅▅▅▅▅▄▄▄▄▆▅▅▆█▆▄▃▃▄6931.05795.01915.01986.02157.02852.02359.02564.02294.01945.02398.02723.03663.03708.03317.03705.03520.04197.04382.04301.04514.04338.04375.04336.04469.04509.04859.04543.04746.04225.04204.04382.04411.05162.04677.04777.05698.06885.05671.03995.03105.02998.04220.0NANANA3762.0NANANA
us-gaap:LongTermDebtCurrent ▂█▁▁▁▆▂79.0831.01.03.07.0640.088.0NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:OperatingLeaseLiabilityCurrent ██▇▇▇▇▇▇██▁79.079.069.069.069.071.073.073.074.074.00.0NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:OtherAccruedLiabilitiesCurrent █▆▃▃▂▂▃▂▂▂▃▃▃▃▃▄▄▅▂▇▆▆▂█▇▆▂█▆▅▁1225.01008.0678.0651.0581.0550.0663.0625.0601.0550.0680.0659.0719.0662.0734.0830.0810.0887.0543.01150.0982.0981.0568.01222.01082.01047.0553.01200.01065.0950.0480.0NANANA567.0NANANA281.0NANANA307.0NANANA298.0NANANA
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312009-09-302009-06-302009-03-31
us-gaap:LiabilitiesNoncurrent ▃▃▂▁▁▁▁▁▁▁▂▂▅▅▅▅▅▇▇▇▇▇▇█████▇▆▆▆▆▆▆▄▄▃▃▃▃▄▄12144.011929.011307.08305.08430.08434.08494.08515.08506.09105.09445.09644.017144.017706.017955.017990.018151.021166.021481.021678.021764.022634.022742.023485.023550.024132.023820.023559.021657.020093.018980.019351.019529.019764.019669.014304.014006.013763.013126.012585.013655.014196.014356.0NANANA11672.0NANANA
us-gaap:LongTermDebt NANA8855.05929.05957.06592.06042.06257.06042.06656.06691.07436.016092.016584.016633.017132.017125.019465.019406.019411.019253.019288.019620.020041.020292.020509.020366.020764.018988.017477.016804.016699.016610.016457.015866.011342.010556.010118.09729.09185.08886.0NA9104.0NANANA8295.0NANANA
us-gaap:LongTermDebtNoncurrent ███▁▁▁▁8712.08705.08691.05792.05810.05807.05803.0NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:DebtAndCapitalLeaseObligations ▂█▁8944.09696.08859.0NANANA6042.06257.06043.06657.06692.07438.016095.016588.016638.017138.017131.019477.019414.019422.019268.019306.019636.020055.020297.020515.020374.020773.018998.017488.016817.016713.016626.016470.015880.011342.010556.010221.09832.09289.09000.0NA9211.0NANANA8418.0NANANA
us-gaap:LongTermDebtAndCapitalLeaseObligations █▆▁8712.08705.08691.0NANANA5803.05798.05794.06366.06449.06658.014821.015406.015716.015658.015842.017672.018006.018018.017893.018677.018983.019598.019661.020050.019900.019919.018165.016803.015767.015802.015889.015914.015733.010968.010485.010150.09745.09208.08910.08802.08748.0NANANA7847.0NANANA
us-gaap:DeferredIncomeTaxLiabilitiesNet ▇▃▂▁▁▁▁██▇▇64.030.019.017.017.015.017.070.071.062.065.0NANANA21.021.0NANA20.0NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
 us-gaap:PensionAndOtherPostretirementDefinedBenefitPlansLiabilitiesNoncurrent us-gaap:RetirementPlanType us-gaap:OtherPostretirementBenefitPlansDefinedBenefitNANA85.0NANANA86.0NANANA76.0NANANA121.0NANANA120.0NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
 us-gaap:PensionAndOtherPostretirementDefinedBenefitPlansLiabilitiesNoncurrent us-gaap:RetirementPlanType us-gaap:PensionPlansDefinedBenefitNANA217.0NANANA247.0NANANA241.0NANANA225.0NANANA288.0NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:OtherLiabilitiesNoncurrent ▆▆▅▅▅▅▅▅▅▅▃▆▆▆▃▅▆█▄███▄███▄▇▆▆▃▇▇█▃▄▄▄▁▃▂▆▄1215.01192.01066.01062.01061.01076.01084.01036.01016.01089.0718.01177.01130.01136.0664.01116.01135.01487.0930.01480.01554.01547.0900.01478.01527.01549.0847.01385.01254.01230.0695.01377.01417.01474.0735.0896.0878.0810.0356.0622.0598.01133.0820.0NANANA519.0NANANA
us-gaap:OperatingLeaseLiabilityNoncurrent ▅▅▅▅▇▇▇███▁272.0280.0278.0297.0458.0473.0483.0500.0513.0529.00.0NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearTwo NANA82.0NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearThree NANA81.0NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearFour NANA71.0NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearFive NANA47.0NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueAfterYearFive NANA34.0NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312009-09-302009-06-302009-03-31
us-gaap:StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest ▃▃▃▃▃▃▃▁▁▁▁▁▃▃▃▄▄▄▄▅▄▅▅█████▇▇▇▇▇▇▇▆▆▆▆▆▆▆▆2544.01517.01680.01934.01750.01536.01658.0-1571.0-1648.0-1538.0-1234.0-936.02071.02258.01968.03690.03483.04013.04446.05493.05121.05381.05434.011839.012017.011377.011676.011690.010977.010394.010469.010881.010303.010196.010533.07890.07903.07633.07669.07932.08328.07601.08072.0NANANA7697.0NANANA
us-gaap:CommonStockValue ███████████████████████████████████▁▁▁▁▁▁▁▁4.04.04.04.04.04.04.04.04.04.04.04.04.04.04.04.04.04.04.04.04.04.04.04.04.04.04.04.04.04.04.04.04.04.04.03.03.03.03.03.03.03.03.0NANANA3.0NANANA
us-gaap:AdditionalPaidInCapitalCommonStock █████████████████████████████▇▇▇▆▆▆▁▁▁▁▁▁▁▁8519.08513.08517.08511.08505.08498.08501.08494.08488.08473.08510.08453.08481.08379.08376.08369.08383.08375.08358.08370.08306.08299.08296.08382.08365.08362.08327.08314.08303.07842.07840.07843.07615.07602.07587.05388.05383.05374.05346.05348.05339.05330.05323.0NANANA4948.0NANANA
us-gaap:RetainedEarningsAccumulatedDeficit ▅▄▄▄▄▄▄▂▂▁▁▁▁▁▁▂▂▂▃▃▃▃▃▇▇▇▇▇▇▇▇██████████▇█-567.0-1565.0-1403.0-1157.0-1331.0-1570.0-1616.0-4991.0-5355.0-5548.0-6022.0-6001.0-5920.0-5982.0-6268.0-4713.0-4874.0-4238.0-3787.0-2791.0-3179.0-2977.0-3007.03358.03346.03413.03588.03564.03445.03594.03695.04272.04179.04124.04494.04002.04026.03777.03987.04099.04156.03538.03800.0NANANA3332.0NANANA
us-gaap:AccumulatedOtherComprehensiveIncomeLossNetOfTax ▁▁▁▁▁▁▁▂▂▂▂▃▃▃▂▂▂▂▂▂▁▁▁▁▁▁▁▃▃▃▃▂▂▂▂▃▃▄▄▅▇▇█-182.0-203.0-206.0-190.0-194.0-207.0-192.0-158.0-99.0-96.0-94.0-58.0-60.0-61.0-72.0-91.0-100.0-124.0-135.0-142.0-203.0-195.0-173.0-188.0-170.0-191.0-174.0-5.05.010.05.0-129.0-118.0-136.0-150.0-68.0-17.071.074.0201.0305.0363.0432.0NANANA416.0NANANA
us-gaap:TreasuryStockValue ███████▇▇▆▅▄▄▃▃▃▃▃▃▃▃▃▃▃▂▂▂▂▂▂▂▂▂▂▂▂▂▂▂▂▁▁▁5230.05232.05232.05234.05234.05189.05039.04920.04686.04371.03632.03334.02871.02474.02386.02386.02392.02392.02399.02399.02406.02406.02413.02330.02166.02059.01983.01939.01940.01940.01942.01942.01944.01944.01920.01920.01922.01922.01924.01881.01633.01633.01503.0NANANA1163.0NANANA
us-gaap:StockIssuedDuringPeriodValueNewIssues NA1.0NANA1.0NANA1.0NA5.0NA4.04.07.0NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
 us-gaap:StockIssuedDuringPeriodValueNewIssues us-gaap:StatementEquityComponents us-gaap:AdditionalPaidInCapitalNA1.0NANA1.0NANA1.0NA5.0NA4.04.07.0NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue █▁6.0-5.0NA6.06.0-21.0NA5.05.0-32.0NA4.08.0-10.0NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312009-09-302009-06-302009-03-31
us-gaap:NetCashProvidedByUsedInOperatingActivities █▁▅▆▅▅▆▅▆▄▅▆▄▅▆▆▄▄▅▇▅▆▄▇▅▅▅▆▄▅▅▇▄▄▄▅▆▄▅▅▄▅▅▆▅▄1294.0-917.0451.0694.0484.0208.0552.0472.0516.0-127.0295.0558.0167.0357.0581.0732.0142.0-68.0339.0860.0319.0554.0-83.0934.0198.0260.0396.0744.0-21.0391.0447.0901.046.0-124.091.0473.0661.0-76.0498.0359.093.0216.0482.0536.0491.0114.0NANANANA
us-gaap:NetCashProvidedByUsedInInvestingActivities ▆▁▆▆▆▆▆▅▆█▆█▅▆▆▆▆▆▅▆▆▆▆▆▅▆▆▄▃▆▅▅▅▅▆▅▅▅▅▄▅▆▅▆▆▆-128.0-3364.0-10.0-339.0-77.0-68.0-58.0-489.0-93.01196.0-146.01087.0-714.0-432.0-301.0-220.0-313.0-232.0-503.0148.0-326.0-143.0-253.0-372.0-590.0-270.055.0-1205.0-1877.0124.0-497.0-656.0-539.0-836.067.0-774.0-1012.0-543.0-886.0-1102.0-831.0-228.0-1053.0-185.0-191.0-194.0NANANANA
 us-gaap:NetCashProvidedByUsedInInvestingActivities us-gaap:ConsolidatedEntities srt:GuarantorSubsidiariesNANANA-65.0-57.0-57.0-50.0-376.0-56.0-60.0-81.0-45.0-52.0-80.0-70.0NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
 us-gaap:NetCashProvidedByUsedInInvestingActivities us-gaap:ConsolidatedEntities srt:NonGuarantorSubsidiariesNANANA-268.0-12.0-6.0-1.0-109.0-10.0356.0-56.0-247.0-734.0-401.0-355.0NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
 us-gaap:NetCashProvidedByUsedInInvestingActivities us-gaap:ConsolidatedEntities srt:ParentCompanyNANANA696.01124.0752.0841.0923.0711.0900.0-9.01238.0241.021.079.0NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
 us-gaap:NetCashProvidedByUsedInInvestingActivities us-gaap:ConsolidationItems srt:ConsolidationEliminationsNANANA-702.0-1132.0-757.0-848.0-927.0-738.00.00.0157.0-157.00.0129.0NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:NetCashProvidedByUsedInFinancingActivities ▁▅█▃▂▄▂▃▁▂▁▁▄▃▂▃▃▃▂▃▂▂▂▂▄▃▂▅▃▄▃▄▃▄▄▄▄▄▄▃▃▃▃▅▃▂-831.0924.02771.0-98.0-762.0293.0-386.0-42.0-972.0-748.0-860.0-1089.0472.0-49.0-544.041.0171.0-153.0-305.041.0-266.0-264.0-406.0-455.0389.040.0-276.0907.0218.0416.0176.0515.0156.0580.0320.0764.0488.0527.0366.0-65.0-36.0-232.076.0922.061.0-408.0NANANANA
 us-gaap:NetCashProvidedByUsedInFinancingActivities us-gaap:ConsolidatedEntities srt:GuarantorSubsidiariesNANANA47.0-1881.0-125.069.0-292.0-528.0-4.0-1056.0123.0-287.0-481.0-1643.0NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
 us-gaap:NetCashProvidedByUsedInFinancingActivities us-gaap:ConsolidatedEntities srt:NonGuarantorSubsidiariesNANANA876.0142.0-59.018.056.0-105.0-281.0162.0-208.0129.0506.0-340.0NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
 us-gaap:NetCashProvidedByUsedInFinancingActivities us-gaap:ConsolidatedEntities srt:ParentCompanyNANANA-1723.0-155.0-280.0-1321.0-733.0-1077.0-463.034.0-874.0465.0-39.01188.0NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
 us-gaap:NetCashProvidedByUsedInFinancingActivities us-gaap:ConsolidationItems srt:ConsolidationEliminationsNANANA702.01132.0757.0848.0927.0738.00.00.0-157.0157.00.0-129.0NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect ▅▁█▅▄▅▅▅▄▅▄▅▄▄▄▅▅▄▄▅335.0-3356.03212.0256.0-356.0433.0108.0-59.0-549.0272.0-807.0533.0-75.0-124.0-255.0551.0213.0-359.0-317.0541.0NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312009-09-302009-06-302009-03-31
us-gaap:DepreciationDepletionAndAmortization ▁▆▂▂▂▂▂▂▂▂▁▂▄▄▅▅▅▆▇▇▆▆▇▇▇▇█▇▇▆▆▆▆▆▅▄▄▄▄▄▄▄▄▄▄▄53.0317.0117.099.0110.0109.0112.091.085.085.051.0112.0227.0235.0267.0272.0260.0300.0388.0357.0309.0313.0393.0382.0396.0395.0427.0375.0386.0335.0335.0318.0305.0298.0247.0239.0234.0230.0231.0238.0222.0205.0218.0210.0208.0202.0NANANANA
us-gaap:IncreaseDecreaseInOtherOperatingCapitalNet ▃█▃▄▄▄▂▅▄▅▂▄▅▅▃▄▅▅▄▃▅▄▄▃▅▄▃▅▄▃▄▄▆▄▁▄▅▄▃▃▄▅▃▄▄▄-178.0843.0-153.038.0100.099.0-416.0214.0118.0270.0-271.0-26.0262.0139.0-164.01.0180.0199.0-16.0-247.0234.0121.056.0-195.0255.033.0-144.0297.0129.0-65.047.0-52.0421.037.0-566.021.0225.042.0-226.0-80.061.0241.0-177.0-57.0119.0105.0NANANANA
 us-gaap:IncreaseDecreaseInOtherOperatingCapitalNet us-gaap:ConsolidatedEntities srt:GuarantorSubsidiariesNANANA-479.0-6.0130.0NA58.0122.0221.0NA719.0125.0-277.0NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
 us-gaap:IncreaseDecreaseInOtherOperatingCapitalNet us-gaap:ConsolidatedEntities srt:NonGuarantorSubsidiariesNANANA904.05.014.0NA56.0-73.0137.0NA5.0-283.0339.0NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
 us-gaap:IncreaseDecreaseInOtherOperatingCapitalNet us-gaap:ConsolidatedEntities srt:ParentCompanyNANANA-387.0101.0-45.0NA100.0-240.0221.0NA412.01.0444.0NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:NetCashProvidedByUsedInOperatingActivities █▁▅▆▅▅▆▅▆▄▅▆▄▅▆▆▄▄▅▇▅▆▄▇▅▅▅▆▄▅▅▇▄▄▄▅▆▄▅▅▄▅▅▆▅▄1294.0-917.0451.0694.0484.0208.0552.0472.0516.0-127.0295.0558.0167.0357.0581.0732.0142.0-68.0339.0860.0319.0554.0-83.0934.0198.0260.0396.0744.0-21.0391.0447.0901.046.0-124.091.0473.0661.0-76.0498.0359.093.0216.0482.0536.0491.0114.0NANANANA
us-gaap:NetIncomeLoss ▆▅▅▆▆▆█▆▆▆▆▆▆▆▄▆▅▅▅▆▅▆▁▆▆▅▆▆▅▆▅▆▆▅▆▆▆▅▅▆▆▅▆▆▆▆▆▆▆▆1078.0-82.0-173.0249.0313.0121.03383.0372.0201.0482.0-12.0-72.072.0279.0-1535.0171.0-626.0-163.0-987.0402.0-271.082.0-6314.066.0-14.0-120.0119.0168.0-97.0-56.0-290.0124.0130.0-328.0516.0-1.0251.0-207.0-109.0-55.0621.0-260.0-15.0223.0211.058.033.0278.0433.0198.0
us-gaap:ProfitLoss ▆▆▅▆▆▆█▆▆▆▆▆▆▆▄▆▅▅▅▆▅▆▁▆▆▅▆▆▆▆▅▆▆▅▆▆▆▅▅▆▆▅▆▆▆▆1078.0-82.0-173.0249.0313.0121.03385.0372.0202.0482.0-13.0-48.096.0233.0-1655.0163.0-642.0-203.0-1055.0393.0-276.047.0-6358.067.0-9.0-136.097.0182.0-80.0-67.0-290.0143.0137.0-327.0518.08.0259.0-206.0-109.0-55.0621.0-260.0-15.0223.0210.058.0NANANANA
us-gaap:ShareBasedCompensation ▅▅▅▅▆▅▅▅▅▅▁▆▇▇▆▆▆▆▁▆▆▆▅▇▇▆▆▆█▆▅▆▅█▇▆█▄▇▄6.04.05.05.07.05.05.05.06.04.0-11.010.013.013.08.011.08.08.0-13.07.08.08.04.013.013.011.010.08.016.08.06.08.06.018.014.09.018.00.014.00.0NANANANANANANANANANA
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312009-09-302009-06-302009-03-31
us-gaap:NetCashProvidedByUsedInInvestingActivities ▆▁▆▆▆▆▆▅▆█▆█▅▆▆▆▆▆▅▆▆▆▆▆▅▆▆▄▃▆▅▅▅▅▆▅▅▅▅▄▅▆▅▆▆▆-128.0-3364.0-10.0-339.0-77.0-68.0-58.0-489.0-93.01196.0-146.01087.0-714.0-432.0-301.0-220.0-313.0-232.0-503.0148.0-326.0-143.0-253.0-372.0-590.0-270.055.0-1205.0-1877.0124.0-497.0-656.0-539.0-836.067.0-774.0-1012.0-543.0-886.0-1102.0-831.0-228.0-1053.0-185.0-191.0-194.0NANANANA
 us-gaap:NetCashProvidedByUsedInInvestingActivities us-gaap:ConsolidatedEntities srt:GuarantorSubsidiariesNANANA-65.0-57.0-57.0-50.0-376.0-56.0-60.0-81.0-45.0-52.0-80.0-70.0NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
 us-gaap:NetCashProvidedByUsedInInvestingActivities us-gaap:ConsolidatedEntities srt:NonGuarantorSubsidiariesNANANA-268.0-12.0-6.0-1.0-109.0-10.0356.0-56.0-247.0-734.0-401.0-355.0NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
 us-gaap:NetCashProvidedByUsedInInvestingActivities us-gaap:ConsolidatedEntities srt:ParentCompanyNANANA696.01124.0752.0841.0923.0711.0900.0-9.01238.0241.021.079.0NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
 us-gaap:NetCashProvidedByUsedInInvestingActivities us-gaap:ConsolidationItems srt:ConsolidationEliminationsNANANA-702.0-1132.0-757.0-848.0-927.0-738.00.00.0157.0-157.00.0129.0NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:PaymentsToAcquirePropertyPlantAndEquipment ▃▃▃▃▃▃▃▃▃▃▃▁▅▅▅▄▄▄▅▄▅▄▅▅▅▄▄▄▄▄▅▄▅▇███▆█▆▆▄▄▄▄▄80.063.063.051.050.066.045.076.058.049.043.0-346.0333.0358.0351.0218.0274.0268.0346.0276.0343.0279.0394.0306.0331.0252.0234.0168.0270.0237.0406.0300.0468.0813.0922.0881.0954.0639.0955.0516.0620.0219.0216.0160.0145.0185.0NANANANA
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312009-09-302009-06-302009-03-31
us-gaap:NetCashProvidedByUsedInFinancingActivities ▁▅█▃▂▄▂▃▁▂▁▁▄▃▂▃▃▃▂▃▂▂▂▂▄▃▂▅▃▄▃▄▃▄▄▄▄▄▄▃▃▃▃▅▃▂-831.0924.02771.0-98.0-762.0293.0-386.0-42.0-972.0-748.0-860.0-1089.0472.0-49.0-544.041.0171.0-153.0-305.041.0-266.0-264.0-406.0-455.0389.040.0-276.0907.0218.0416.0176.0515.0156.0580.0320.0764.0488.0527.0366.0-65.0-36.0-232.076.0922.061.0-408.0NANANANA
 us-gaap:NetCashProvidedByUsedInFinancingActivities us-gaap:ConsolidatedEntities srt:GuarantorSubsidiariesNANANA47.0-1881.0-125.069.0-292.0-528.0-4.0-1056.0123.0-287.0-481.0-1643.0NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
 us-gaap:NetCashProvidedByUsedInFinancingActivities us-gaap:ConsolidatedEntities srt:NonGuarantorSubsidiariesNANANA876.0142.0-59.018.056.0-105.0-281.0162.0-208.0129.0506.0-340.0NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
 us-gaap:NetCashProvidedByUsedInFinancingActivities us-gaap:ConsolidatedEntities srt:ParentCompanyNANANA-1723.0-155.0-280.0-1321.0-733.0-1077.0-463.034.0-874.0465.0-39.01188.0NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
 us-gaap:NetCashProvidedByUsedInFinancingActivities us-gaap:ConsolidationItems srt:ConsolidationEliminationsNANANA702.01132.0757.0848.0927.0738.00.00.0-157.0157.00.0-129.0NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
 us-gaap:ProceedsFromIssuanceOfLongTermDebt us-gaap:BusinessAcquisition nrg:DirectEnergyNANA2900.0NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:PaymentsOfDividendsCommonStock ▁█79.080.0NANA74.074.0NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:PaymentsForRepurchaseOfCommonStock ▁█0.09.0NANA50.0179.0NANANANANANANANANANANANA0.00.00.00.084.0167.0107.079.039.00.00.00.00.00.05.020.00.00.00.00.052.0248.00.0130.00.0130.0NANANANANANA
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312009-09-302009-06-302009-03-31

Common Stock Value

us-gaap:CommonStockValue

us-gaap:CommonStockValue


Common
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312009-12-31
Value4000000.04000000.04000000.04000000.04000000.04000000.04000000.04000000.04000000.04000000.04000000.04000000.04000000.04000000.04000000.04000000.04000000.04000000.04000000.04000000.04000000.04000000.04000000.04000000.04000000.04000000.04000000.04000000.04000000.04000000.04000000.04000000.04000000.04000000.04000000.03000000.03000000.03000000.03000000.03000000.03000000.03000000.03000000.03000000.0
Percentage of CommonStockValue100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

Weighted Average Number Of Diluted Shares Outstanding

us-gaap:WeightedAverageNumberOfDilutedSharesOutstanding

us-gaap:WeightedAverageNumberOfDilutedSharesOutstanding


Weighted
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312009-09-302009-06-302009-03-31
Value245245245246249253256267280289299314322317322316316316317315315315332333336342343337324323327327323249228229228229240244247248253256257244272275275
Percentage of WeightedAverageNumberOfDilutedSharesOutstanding100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Weighted Average Number Of Shares Outstanding Basic

us-gaap:WeightedAverageNumberOfSharesOutstandingBasic

us-gaap:WeightedAverageNumberOfSharesOutstandingBasic


Weighted
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312009-09-302009-06-302009-03-31
Value245245244245248251254265278289299310318317317316316316316315315315331333336338338337324323323323323247228228228229240243247248252255254242249253237
Percentage of WeightedAverageNumberOfSharesOutstandingBasic100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Antidilutive Securities Excluded From Computation Of Earnings Per Share Amount

us-gaap:AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount

us-gaap:AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount


Antidilutive
Period End2021-03-312018-09-302018-06-302018-03-312017-09-302017-06-302017-03-312016-09-302016-06-302016-03-312015-09-302015-06-302015-03-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-312012-09-302012-06-302012-03-312011-09-302011-06-302011-03-312010-09-302010-06-302010-03-31
Value1.0160.01.01.06.06.02.03.020192323172424181829272525232323222222
Percentage of AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount100.0100.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Earnings Per Share Basic

us-gaap:EarningsPerShareBasic

us-gaap:EarningsPerShareBasic


Earnings
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312009-09-302009-06-302009-03-31
Value4.4-0.33-0.71.021.280.4913.481.460.761.73-0.04-0.240.230.88-4.840.54-1.98-0.52-3.131.27-0.610.24-20.080.18-0.06-0.370.210.49-0.3-0.18-0.90.380.39-1.022.08-0.011.09-0.92-0.48-0.242.54-1.06-0.070.880.820.220.111.091.680.78
Percentage of EarningsPerShareBasic100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Earnings Per Share Diluted

us-gaap:EarningsPerShareDiluted

us-gaap:EarningsPerShareDiluted


Earnings
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312009-09-302009-06-302009-03-31
Value4.4-0.33-0.71.021.270.4913.371.450.751.72-0.04-0.240.230.87-4.840.53-1.98-0.52-3.131.27-0.670.24-20.080.18-0.06-0.370.20.48-0.3-0.18-0.90.370.39-1.032.06-0.011.08-0.92-0.48-0.242.53-1.06-0.070.870.810.220.111.021.560.7
Percentage of EarningsPerShareDiluted100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Income Loss From Continuing Operations Per Basic Share

us-gaap:IncomeLossFromContinuingOperationsPerBasicShare

us-gaap:IncomeLossFromContinuingOperationsPerBasicShare


Income
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-30
Value-0.71.021.280.4913.241.470.710.34-0.430.940.310.88-4.880.630.36-0.41-2.610.43
Percentage of IncomeLossFromContinuingOperationsPerBasicShare100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Income Loss From Continuing Operations Per Diluted Share

us-gaap:IncomeLossFromContinuingOperationsPerDilutedShare

us-gaap:IncomeLossFromContinuingOperationsPerDilutedShare


Income
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-30
Value-0.71.021.270.4913.141.460.70.34-0.420.940.310.87-4.240.610.36-0.41-2.520.43
Percentage of IncomeLossFromContinuingOperationsPerDilutedShare100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Comprehensive Income Net Of Tax

us-gaap:ComprehensiveIncomeNetOfTax

us-gaap:ComprehensiveIncomeNetOfTax


Comprehensive
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-30
Value-189.02533261063349313198480-48.0-73.071282-1518.0177-601.0-153.0-1001.0456-268.077-6304.0660.0-124.0-70.0158-97.0-47.0-179.0114148-314.0434-52.0163-210.0-236.0-159.0563-329.0-154.0318
Percentage of ComprehensiveIncomeNetOfTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax0.09.415.35.5152.612.511.127.0-2.4-3.53.715.5-60.85.8-22.3-5.5-39.511.5-10.22.4-209.41.50.0-3.2-1.73.5-2.7-1.3-6.43.35.1-15.121.0-2.27.5-11.3-11.1-5.924.7-16.5-8.511.8

us-gaap:ComprehensiveIncomeNetOfTax us-gaap:ConsolidatedEntities

srt:GuarantorSubsidiaries


Comprehensive
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-30
Value499586256289543388256137304207329-390.0405
Percentage of ComprehensiveIncomeNetOfTax197.2179.8241.58.6173.5196.053.3-285.4-416.4291.5116.725.7228.8
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax18.627.613.313.221.721.814.46.914.710.718.0-15.613.3
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax srt:GuarantorSubsidiaries0.00.00.00.00.00.00.00.00.00.00.00.00.0

srt:NonGuarantorSubsidiaries


Comprehensive
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-30
Value5126-19.054-35.04255-8.0171149-1.0-513.0193
Percentage of ComprehensiveIncomeNetOfTax20.28.0-17.91.6-11.221.211.516.7-234.2209.9-0.433.8109.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax1.91.2-1.02.5-1.42.43.1-0.48.27.7-0.1-20.56.3
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax srt:NonGuarantorSubsidiaries0.00.00.00.00.00.00.00.00.00.00.00.00.0

srt:ParentCompany


Comprehensive
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-30
Value2533261063349313198480-46.0-86.071283-1518.0178
Percentage of ComprehensiveIncomeNetOfTax100.0100.0100.0100.0100.0100.0100.095.8117.8100.0100.4100.0100.6
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax9.415.35.5152.612.511.127.0-2.3-4.13.715.5-60.85.8
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax srt:ParentCompany0.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:ComprehensiveIncomeNetOfTax us-gaap:ConsolidationItems

srt:ConsolidationEliminations


Comprehensive
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-30
Value-550.0-612.0-237.0-343.0-508.0-430.0-311.0-131.0-462.0-356.0-329.0904-599.0
Percentage of ComprehensiveIncomeNetOfTax-217.4-187.7-223.6-10.2-162.3-217.2-64.8272.9632.9-501.4-116.7-59.6-338.4
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax-20.5-28.8-12.3-15.6-20.3-24.1-17.5-6.6-22.3-18.5-18.036.2-19.6
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax srt:ConsolidationEliminations0.00.00.00.00.00.00.00.00.00.00.00.00.0

Comprehensive Income Net Of Tax Including Portion Attributable To Noncontrolling Interest

us-gaap:ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest

us-gaap:ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest


Comprehensive
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-06-302010-03-31
Value1099-79.0-189.02533261063351313199480-49.0-47.097244-1636.0172-618.0-192.0-1048.0454-284.025-6343.04912-153.0-76.0175-85.0-62.0-171.0132155-313.0436-43.0171-209.0-236.0-159.0563-329.020309
Percentage of ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax21.0-1.00.09.415.35.5152.712.511.227.0-2.5-2.35.013.4-65.55.6-22.9-7.0-41.411.5-10.80.8-210.71.10.4-4.0-1.83.8-2.3-1.8-6.13.85.3-15.021.1-1.87.9-11.2-11.1-5.924.7-16.50.914.0

Cost Of Revenue

us-gaap:CostOfRevenue

us-gaap:CostOfRevenue


Cost
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value2957686416152034143414571654215318451651137823072051155816842156183721251817279317562189222530342434306229513278281727331942235520591765146917261319157316902053160813241270183513291639
Percentage of CostOfRevenue100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax56.586.60.075.867.575.775.486.0103.592.869.2111.2106.485.567.470.768.077.071.870.766.667.873.968.571.780.070.471.777.878.469.567.570.384.871.274.060.984.579.376.870.666.469.968.362.374.0

us-gaap:CostOfRevenue us-gaap:ConsolidatedEntities

srt:GuarantorSubsidiaries


Cost
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-30
Value1796127112901260172815901358114120051702115511261826
Percentage of CostOfRevenue88.388.688.576.280.386.282.382.886.983.074.166.984.7
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax66.959.867.057.469.089.276.357.396.688.363.445.159.9
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax srt:GuarantorSubsidiaries0.00.00.00.00.00.00.00.00.00.00.00.00.0

srt:NonGuarantorSubsidiaries


Cost
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-30
Value230154202395421252283240295195224165239
Percentage of CostOfRevenue11.310.713.923.919.613.717.117.412.89.514.49.811.1
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax8.67.310.518.016.814.115.912.014.210.112.36.67.8
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax srt:NonGuarantorSubsidiaries0.00.00.00.00.00.00.00.00.00.00.00.00.0

srt:ParentCompany


Cost
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-30
Value9.07.0-24.02.06.010.09.010.09.0-5.0141618
Percentage of CostOfRevenue0.40.5-1.60.10.30.50.50.70.4-0.20.91.00.8
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax0.30.3-1.20.10.20.60.50.50.4-0.30.80.60.6
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax srt:ParentCompany0.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:CostOfRevenue us-gaap:ConsolidationItems

srt:ConsolidationEliminations


Cost
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-30
Value-1.02.0-11.0-3.0-2.0-7.01.0-13.0-2.0-3.0-8.0-10.0-11.0
Percentage of CostOfRevenue-0.00.1-0.8-0.2-0.1-0.40.1-0.9-0.1-0.1-0.5-0.6-0.5
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax-0.00.1-0.6-0.1-0.1-0.40.1-0.7-0.1-0.2-0.4-0.4-0.4
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax srt:ConsolidationEliminations0.00.00.00.00.00.00.00.00.00.00.00.00.0

Costs And Expenses

us-gaap:CostsAndExpenses

us-gaap:CostsAndExpenses


Costs
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value3686816420402416175417811991245621461945168426592602201738372687240227143323346324682785775440523165376437394020353233253023295526342340202622451769203221232631200916811664223116891980
Percentage of CostsAndExpenses100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax70.4103.00.090.082.692.590.798.1120.4109.384.5128.1135.0110.6153.788.188.998.4131.287.693.686.2257.591.493.298.489.288.097.595.4108.284.789.9112.498.296.381.7109.199.698.488.284.391.683.179.289.4

us-gaap:CostsAndExpenses us-gaap:ConsolidatedEntities

srt:GuarantorSubsidiaries


Costs
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-30
Value2022148815101415191217541534129421971874132125792034
Percentage of CostsAndExpenses83.784.884.871.177.981.778.976.882.672.065.567.275.7
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax75.370.178.464.576.498.486.265.0105.997.272.5103.366.7
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax srt:GuarantorSubsidiaries0.00.00.00.00.00.00.00.00.00.00.00.00.0

srt:NonGuarantorSubsidiaries


Costs
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-30
Value286182226474481291322298350326288399304
Percentage of CostsAndExpenses11.810.412.723.819.613.616.617.713.212.514.310.411.3
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax10.78.611.721.619.216.318.115.016.916.915.816.010.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax srt:NonGuarantorSubsidiaries0.00.00.00.00.00.00.00.00.00.00.00.00.0

srt:ParentCompany


Costs
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-30
Value10982561056510888105187105105142117
Percentage of CostsAndExpenses4.54.73.15.32.65.04.56.27.04.05.23.74.4
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax4.13.92.94.82.66.14.95.39.05.45.85.73.8
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax srt:ParentCompany0.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:CostsAndExpenses us-gaap:ConsolidationItems

srt:ConsolidationEliminations


Costs
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-30
Value-1.02.0-11.0-3.0-2.0-7.01.0-13.0-75.0-4.0-8.0-11.0-12.0
Percentage of CostsAndExpenses-0.00.1-0.6-0.2-0.1-0.30.1-0.8-2.8-0.2-0.4-0.3-0.4
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax-0.00.1-0.6-0.1-0.1-0.40.1-0.7-3.6-0.2-0.4-0.4-0.4
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax srt:ConsolidationEliminations0.00.00.00.00.00.00.00.00.00.00.00.00.0

Disposal Group Not Discontinued Operation Gain Loss On Disposal

us-gaap:DisposalGroupNotDiscontinuedOperationGainLossOnDisposal

us-gaap:DisposalGroupNotDiscontinuedOperationGainLossOnDisposal


Disposal
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-12-312018-09-302014-12-312014-09-302014-06-302014-03-312011-12-312011-09-302011-06-302010-12-312010-09-302010-06-302010-03-31
Value0.0170.00.06.00.01.01.02.0140.00.00.0190.00.00.00.00.00.023
Percentage of DisposalGroupNotDiscontinuedOperationGainLossOnDisposal0.0100.00.00.0100.00.0100.0100.0100.0100.00.00.00.0100.00.00.00.00.00.00.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax0.00.20.00.00.30.00.10.10.10.70.00.00.00.50.00.00.00.00.00.01.0

us-gaap:DisposalGroupNotDiscontinuedOperationGainLossOnDisposal us-gaap:ConsolidationItems, us-gaap:StatementBusinessSegments

us-gaap:OperatingSegments, nrg:WestAndOther


Disposal
Period End2020-09-302020-06-302020-03-312019-06-302019-03-31
Value0.00.01.00.00.0
Percentage of DisposalGroupNotDiscontinuedOperationGainLossOnDisposal0.00.016.70.00.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax0.00.00.10.00.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:OperatingSegments nrg:WestAndOther0.00.01.30.00.0

us-gaap:OperatingSegments, nrg:WestServicesAndOtherSegment


Disposal
Period End2021-06-302021-03-312020-06-302020-03-31
Value0.0170.01.0
Percentage of DisposalGroupNotDiscontinuedOperationGainLossOnDisposal0.0100.00.016.7
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax0.00.20.00.1
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:OperatingSegments nrg:WestServicesAndOtherSegment0.02.80.01.1

us-gaap:OperatingSegments, us-gaap:Corporate


Disposal
Period End2020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-12-312018-09-30
Value0.00.05.00.01.00.01.015
Percentage of DisposalGroupNotDiscontinuedOperationGainLossOnDisposal0.00.083.30.0100.00.050.0107.1
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax0.00.00.30.00.10.00.10.7
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:OperatingSegments us-gaap:Corporate0.00.00.00.00.00.00.00.0

us-gaap:DisposalGroupNotDiscontinuedOperationGainLossOnDisposal us-gaap:DisposalGroupClassification, us-gaap:IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperations

us-gaap:DisposalGroupHeldForSaleOrDisposedOfBySaleNotDiscontinuedOperations, nrg:AguaCalienteSolarProject


Disposal
Period End2021-02-03
Value17
Percentage of DisposalGroupNotDiscontinuedOperationGainLossOnDisposal0.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax0.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:DisposalGroupHeldForSaleOrDisposedOfBySaleNotDiscontinuedOperations nrg:AguaCalienteSolarProject0.0

Gains Losses On Extinguishment Of Debt

us-gaap:GainsLossesOnExtinguishmentOfDebt

us-gaap:GainsLossesOnExtinguishmentOfDebt


Gains
Period End2020-12-312020-09-302020-06-302019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-30
Value-8.00.00.0-4.00.0-47.00.0-22.0-19.0-1.0-2.0-50.0-1.00.0-2.0-23.0-50.0-80.01184-2.0-7.00.0-1.0-13.0-40.0-41.00.0-1.0-21.0-28.0-10.0-41.00.00.00.0-32.0-115.0-28.00.0-1.00.0
Percentage of GainsLossesOnExtinguishmentOfDebt100.00.00.0100.00.0100.00.0100.0100.0100.0100.0100.0100.00.0100.0100.0100.0100.0100.0100.0100.0100.00.0100.0100.0100.0100.00.0100.0100.0100.0100.0100.00.00.00.0100.0100.0100.00.0100.00.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax0.00.00.0-0.20.0-2.60.0-1.1-0.9-0.1-0.1-2.0-0.00.0-0.1-0.9-1.3-3.00.32.8-0.0-0.20.0-0.0-0.3-1.1-1.20.0-0.0-0.7-1.3-0.5-1.80.00.00.0-1.2-5.0-1.40.0-0.00.0

us-gaap:GainsLossesOnExtinguishmentOfDebt us-gaap:ConsolidatedEntities

srt:ParentCompany


Gains
Period End2020-09-302019-12-312019-09-302019-06-302018-12-312018-09-302018-06-302018-03-31
Value0.0-1.00.0-47.0-22.0-19.0-1.0-2.0
Percentage of GainsLossesOnExtinguishmentOfDebt0.025.00.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax0.0-0.00.0-2.6-1.1-0.9-0.1-0.1
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax srt:ParentCompany0.00.00.00.00.00.00.00.0

us-gaap:GainsLossesOnExtinguishmentOfDebt us-gaap:DisposalGroupClassification, us-gaap:IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperations

us-gaap:DisposalGroupHeldForSaleOrDisposedOfBySaleNotDiscontinuedOperations, nrg:HomeSolar


Gains
Period End2020-11-13
Value5.0
Percentage of GainsLossesOnExtinguishmentOfDebt0.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax0.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:DisposalGroupHeldForSaleOrDisposedOfBySaleNotDiscontinuedOperations nrg:HomeSolar0.0

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

us-gaap:IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest

us-gaap:IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest


Income
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-30
Value1458-167.0-138.034141414412038018898-153.0313129232-1665.0196103-207.0-1134.0442-251.068-4973.0114-26.0-209.0168271-206.0-98.0-540.030676-476.0437-105.0246-326.0-137.0-135.0-9.0-365.0-9.0312327
Percentage of IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax27.8-2.10.012.719.57.55.515.210.55.5-7.715.16.712.7-66.76.43.8-7.5-44.811.2-9.52.1-165.22.6-0.8-5.54.05.9-5.7-2.8-19.38.82.6-22.921.2-4.511.4-17.5-6.4-5.0-0.4-18.3-0.511.615.3

us-gaap:IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest us-gaap:BusinessAcquisition

nrg:DirectEnergy


Income
Period End2021-06-30
Value1309
Percentage of IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest89.8
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax25.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax nrg:DirectEnergy0.0

us-gaap:IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest us-gaap:ConsolidatedEntities

srt:GuarantorSubsidiaries


Income
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-30
Value492573269261588389246115428304429-1005.0342
Percentage of IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest144.3138.4186.8217.5154.7206.9251.0-75.2136.7235.7184.960.4174.5
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax18.327.014.011.923.521.813.85.820.615.823.5-40.211.2
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax srt:GuarantorSubsidiaries0.00.00.00.00.00.00.00.00.00.00.00.00.0

srt:NonGuarantorSubsidiaries


Income
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-30
Value4914-4.055-30.04549-9.0129-58.014-284.0109
Percentage of IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest14.43.4-2.845.8-7.923.950.05.941.2-45.06.017.155.6
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax1.80.7-0.22.5-1.22.52.8-0.56.2-3.00.8-11.43.6
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax srt:NonGuarantorSubsidiaries0.00.00.00.00.00.00.00.00.00.00.00.00.0

srt:ParentCompany


Income
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-30
Value340413144116379186112-115.0155144134-1000.0235
Percentage of IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest99.799.8100.096.799.798.9114.375.249.5111.657.860.1119.9
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax12.719.47.55.315.110.46.3-5.87.57.57.4-40.07.7
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax srt:ParentCompany0.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest us-gaap:ConsolidationItems

srt:ConsolidationEliminations


Income
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-30
Value-540.0-586.0-265.0-312.0-557.0-432.0-309.0-144.0-399.0-358.0-333.0781-500.0
Percentage of IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest-158.4-141.5-184.0-260.0-146.6-229.8-315.394.1-127.5-277.5-143.5-46.9-255.1
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax-20.1-27.6-13.8-14.2-22.2-24.2-17.4-7.2-19.2-18.6-18.331.3-16.4
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax srt:ConsolidationEliminations0.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:CorporateNonSegment


Income
Period End2021-06-302021-03-312020-06-302020-03-31
Value-159.0-169.0-109.0-82.0
Percentage of IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest-10.9101.2-26.3-56.9
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax-3.0-2.1-5.1-4.3
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:CorporateNonSegment0.00.00.00.0

us-gaap:IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest us-gaap:ConsolidationItems, us-gaap:StatementBusinessSegments

us-gaap:OperatingSegments, nrg:East


Income
Period End2020-09-302020-06-302020-03-312019-09-302019-06-302019-03-31
Value149146241216099
Percentage of IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest43.735.316.731.831.9101.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax5.66.91.24.83.45.6
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:OperatingSegments nrg:East25.830.44.819.813.117.8

us-gaap:OperatingSegments, nrg:EastSegment


Income
Period End2021-06-302021-03-312020-06-302020-03-31
Value78435714220
Percentage of IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest53.8-213.834.313.9
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax15.04.56.71.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:OperatingSegments nrg:EastSegment29.69.630.94.1

us-gaap:OperatingSegments, nrg:TexasSegment


Income
Period End2021-06-302021-03-312020-06-302020-03-31
Value792-425.0350162
Percentage of IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest54.3254.584.5112.5
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax15.1-5.416.58.4
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:OperatingSegments nrg:TexasSegment39.1-11.822.312.0

us-gaap:OperatingSegments, nrg:WestAndOther


Income
Period End2020-09-302020-06-302020-03-312019-09-302019-06-302019-03-31
Value1726411618-23.0
Percentage of IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest5.06.328.54.29.6-23.5
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax0.61.22.10.61.0-1.3
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:OperatingSegments nrg:WestAndOther13.435.153.915.126.5-30.3

us-gaap:OperatingSegments, nrg:WestServicesAndOtherSegment


Income
Period End2021-06-302021-03-312020-06-302020-03-31
Value41703045
Percentage of IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest2.8-41.97.231.2
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax0.80.91.42.3
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:OperatingSegments nrg:WestServicesAndOtherSegment7.311.731.647.9

us-gaap:OperatingSegments, stpr:TX


Income
Period End2020-09-302020-06-302020-03-312019-09-302019-06-302019-03-31
Value288350162348259150
Percentage of IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest84.584.5112.591.6137.8153.1
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax10.716.58.413.914.58.4
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:OperatingSegments stpr:TX14.522.312.019.520.613.0

us-gaap:OperatingSegments, us-gaap:Corporate


Income
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-30
Value-113.0-109.0-82.0-102.0-107.0-151.0-100.0-1394.0349-134.0-126.0-215.0-161.0-135.0-137.0-171.0-202.0-295.0
Percentage of IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest-33.1-26.3-56.9-85.0-28.2-80.3-102.0911.1111.5-103.9-54.312.9-82.1-131.166.215.1-45.7117.5
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax-4.2-5.1-4.3-4.6-4.3-8.5-5.6-70.016.8-7.0-6.9-8.6-5.3-5.0-5.0-6.8-5.1-11.2
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:OperatingSegments us-gaap:Corporate0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

Income Loss From Continuing Operations Including Portion Attributable To Noncontrolling Interest

us-gaap:IncomeLossFromContinuingOperationsIncludingPortionAttributableToNoncontrollingInterest

us-gaap:IncomeLossFromContinuingOperationsIncludingPortionAttributableToNoncontrollingInterest


Income
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-31
Value-173.0249313121346337418994-93.0306121233-1667.019099-170.0-891.0128-163.0-57.0271-206.0-98.029868-483.0
Percentage of IncomeLossFromContinuingOperationsIncludingPortionAttributableToNoncontrollingInterest100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax0.09.314.76.3157.814.910.65.3-4.714.76.312.8-66.86.23.7-6.2-35.23.2-6.2-1.85.9-5.7-2.88.52.3-23.2

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

us-gaap:OperatingSegments, nrg:East


Income
Period End2020-09-302020-06-302019-09-302019-06-302019-03-31
Value1491461216099
Percentage of IncomeLossFromContinuingOperationsIncludingPortionAttributableToNoncontrollingInterest59.846.632.431.7105.3
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax5.66.94.83.45.6
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:OperatingSegments nrg:East25.830.419.813.117.8

us-gaap:OperatingSegments, nrg:WestAndOther


Income
Period End2020-09-302020-06-302019-09-302019-06-302019-03-31
Value17251518-23.0
Percentage of IncomeLossFromContinuingOperationsIncludingPortionAttributableToNoncontrollingInterest6.88.04.09.5-24.5
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax0.61.20.61.0-1.3
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:OperatingSegments nrg:WestAndOther13.433.814.226.5-30.3

us-gaap:OperatingSegments, stpr:TX


Income
Period End2020-09-302020-06-302019-09-302019-06-302019-03-31
Value288350348259150
Percentage of IncomeLossFromContinuingOperationsIncludingPortionAttributableToNoncontrollingInterest115.7111.893.0137.0159.6
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax10.716.513.914.58.4
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:OperatingSegments stpr:TX14.522.319.520.613.0

us-gaap:OperatingSegments, us-gaap:Corporate


Income
Period End2020-09-302020-06-302019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-30
Value-205.0-209.03243-112.0-150.0-104.0-1382.0342-139.0-132.0-168.0-162.0-146.0-137.0-132.0-222.0-312.0
Percentage of IncomeLossFromContinuingOperationsIncludingPortionAttributableToNoncontrollingInterest-82.3-66.893.6-29.9-79.4-110.61486.0111.8-114.9-56.710.1-85.3-147.580.614.8-173.4191.4
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax-7.6-9.8147.7-4.5-8.4-5.8-69.416.5-7.2-7.2-6.7-5.3-5.4-5.0-5.2-5.6-11.8
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:OperatingSegments us-gaap:Corporate0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

Income Tax Expense Benefit

us-gaap:IncomeTaxExpenseBenefit

us-gaap:IncomeTaxExpenseBenefit


Income
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value380-85.0359210123-3343.06.0-1.04.0-12.07.08.0-1.03.06.04.0-4.0-79.0492521138547-17.0-73.07189-126.0-31.0-235.0163-61.0-149.0-81.0-113.0-13.0-120.0-28.0-80.0-630.0-105.06.08911765
Percentage of IncomeTaxExpenseBenefit100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax7.3-1.10.03.44.81.2-152.30.2-0.10.2-0.60.30.4-0.10.10.20.1-0.1-3.11.20.90.746.01.1-0.5-1.91.71.9-3.5-0.9-8.44.7-2.1-7.2-3.9-4.8-0.6-6.4-1.3-3.0-27.7-5.30.33.35.52.9

us-gaap:IncomeTaxExpenseBenefit us-gaap:ConsolidatedEntities

srt:NonGuarantorSubsidiaries


Income
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-30
Value1.01.00.02.01.01.00.0-7.041-71.055-55.00.0
Percentage of IncomeTaxExpenseBenefit1.11.00.0-0.116.7-100.00.058.3585.7-887.5-5500.0-1833.30.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax0.00.00.00.10.00.10.0-0.42.0-3.73.0-2.20.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax srt:NonGuarantorSubsidiaries0.00.00.00.00.00.00.00.00.00.00.00.00.0

srt:ParentCompany


Income
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-30
Value9110023-3345.05.0-2.04.0-34.0-156.0-32.0-162.06061.0
Percentage of IncomeTaxExpenseBenefit98.999.0100.0100.183.3200.0100.0283.3-2228.6-400.016200.020200.016.7
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax3.44.71.2-152.40.2-0.10.2-1.7-7.5-1.7-8.924.30.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax srt:ParentCompany0.00.00.00.00.00.00.00.00.00.00.00.00.0

Interest Expense

us-gaap:InterestExpense

us-gaap:InterestExpense


Interest
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value1251271099996989599105114122121202167198221247269220280277284273291263301310280274255218228206196166163167165161164167173165168147153
Percentage of InterestExpense100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax2.41.60.03.74.55.14.34.05.96.46.15.810.59.27.97.29.19.78.77.110.58.89.16.67.77.97.46.17.67.37.86.57.09.48.07.07.78.97.66.17.38.79.16.36.96.9

us-gaap:InterestExpense us-gaap:ConsolidatedEntities

srt:GuarantorSubsidiaries


Interest
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-30
Value3.04.05.03.04.03.04.03.03.04.03.03.04.0
Percentage of InterestExpense3.04.25.13.24.02.93.52.52.52.01.81.51.8
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax0.10.20.30.10.20.20.20.20.10.20.20.10.1
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax srt:GuarantorSubsidiaries0.00.00.00.00.00.00.00.00.00.00.00.00.0

srt:NonGuarantorSubsidiaries


Interest
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-30
Value0.02.01.02.03.05.04.07.08.013212321
Percentage of InterestExpense0.02.11.02.13.04.83.55.76.66.412.611.69.5
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax0.00.10.10.10.10.30.20.40.40.71.20.90.7
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax srt:NonGuarantorSubsidiaries0.00.00.00.00.00.00.00.00.00.00.00.00.0

srt:ParentCompany


Interest
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-30
Value9690929092971061121101069299114
Percentage of InterestExpense97.093.893.994.792.992.493.091.890.952.555.150.051.6
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax3.64.24.84.13.75.46.05.65.35.55.04.03.7
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax srt:ParentCompany0.00.00.00.00.00.00.00.00.00.00.00.00.0

Net Income Loss

us-gaap:NetIncomeLoss

us-gaap:NetIncomeLoss


Net
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312009-09-302009-06-302009-03-31
Value1078-82.0-173.02493131213383372201482-12.0-72.072279-1535.0171-626.0-163.0-987.0402-271.082-6314.066-14.0-120.0119168-97.0-56.0-290.0124130-328.0516-1.0251-207.0-109.0-55.0621-260.0-15.02232115833278433198
Percentage of NetIncomeLoss100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax20.6-1.00.09.314.76.3154.114.911.327.1-0.6-3.53.715.3-61.55.6-23.2-5.9-39.010.2-10.32.5-209.71.5-0.4-3.12.83.7-2.7-1.6-10.43.64.4-15.825.0-0.011.6-11.1-5.1-2.127.3-13.0-0.88.39.92.61.59.519.411.9

us-gaap:NetIncomeLoss us-gaap:ConsolidatedEntities

srt:GuarantorSubsidiaries


Net
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-30
Value492573269261588389255148306211331-316.0342
Percentage of NetIncomeLoss197.6183.1222.37.7158.1193.552.9-1233.3-425.0293.1118.620.6200.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax18.327.014.011.923.521.814.37.414.710.918.2-12.711.2
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax srt:GuarantorSubsidiaries0.00.00.00.00.00.00.00.00.00.00.00.00.0

srt:NonGuarantorSubsidiaries


Net
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-30
Value4813-4.051-31.04354-4.01661492.0-396.0124
Percentage of NetIncomeLoss19.34.2-3.31.5-8.321.411.233.3-230.6206.90.725.872.5
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax1.80.6-0.22.3-1.22.43.0-0.28.07.70.1-15.94.1
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax srt:NonGuarantorSubsidiaries0.00.00.00.00.00.00.00.00.00.00.00.00.0

srt:ParentCompany


Net
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-30
Value2493131213383372201482-12.0-72.072279-1534.0171
Percentage of NetIncomeLoss100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.099.9100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax9.314.76.3154.114.911.327.1-0.6-3.53.715.3-61.45.6
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax srt:ParentCompany0.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:NetIncomeLoss us-gaap:ConsolidationItems

srt:ConsolidationEliminations


Net
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-30
Value-540.0-586.0-265.0-312.0-557.0-432.0-309.0-144.0-472.0-360.0-333.0712-466.0
Percentage of NetIncomeLoss-216.9-187.2-219.0-9.2-149.7-214.9-64.11200.0655.6-500.0-119.4-46.4-272.5
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax-20.1-27.6-13.8-14.2-22.2-24.2-17.4-7.2-22.7-18.7-18.328.5-15.3
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax srt:ConsolidationEliminations0.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:CorporateNonSegment


Net
Period End2021-06-302021-03-312020-06-302020-03-31
Value-526.0-79.0-209.0-105.0
Percentage of NetIncomeLoss-48.896.3-66.8-86.8
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax-10.0-1.0-9.8-5.5
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:CorporateNonSegment0.00.00.00.0

us-gaap:NetIncomeLoss us-gaap:ConsolidationItems, us-gaap:StatementBusinessSegments

us-gaap:OperatingSegments, nrg:East


Net
Period End2020-09-302020-06-302020-03-312019-09-302019-06-302019-03-31
Value149146241216099
Percentage of NetIncomeLoss59.846.619.832.529.920.5
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax5.66.91.24.83.45.6
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:OperatingSegments nrg:East25.830.44.819.813.117.8

us-gaap:OperatingSegments, nrg:EastSegment


Net
Period End2021-06-302021-03-312020-06-302020-03-31
Value77235314220
Percentage of NetIncomeLoss71.6-430.545.416.5
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax14.74.56.71.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:OperatingSegments nrg:EastSegment29.19.530.94.1

us-gaap:OperatingSegments, nrg:TexasSegment


Net
Period End2021-06-302021-03-312020-06-302020-03-31
Value792-425.0350162
Percentage of NetIncomeLoss73.5518.3111.8133.9
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax15.1-5.416.58.4
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:OperatingSegments nrg:TexasSegment39.1-11.822.312.0

us-gaap:OperatingSegments, nrg:WestAndOther


Net
Period End2020-09-302020-06-302020-03-312019-09-302019-06-302019-03-31
Value1725411517-23.0
Percentage of NetIncomeLoss6.88.033.94.08.5-4.8
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax0.61.22.10.61.0-1.3
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:OperatingSegments nrg:WestAndOther13.433.853.914.225.0-30.3

us-gaap:OperatingSegments, nrg:WestServicesAndOtherSegment


Net
Period End2021-06-302021-03-312020-06-302020-03-31
Value40692945
Percentage of NetIncomeLoss3.7-84.19.337.2
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax0.80.91.42.3
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:OperatingSegments nrg:WestServicesAndOtherSegment7.211.630.547.9

us-gaap:OperatingSegments, stpr:TX


Net
Period End2020-09-302020-06-302020-03-312019-09-302019-06-302019-03-31
Value288350162348259150
Percentage of NetIncomeLoss115.7111.8133.993.5128.931.1
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax10.716.58.413.914.58.4
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:OperatingSegments stpr:TX14.522.312.019.520.613.0

us-gaap:OperatingSegments, us-gaap:Corporate


Net
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-30
Value-205.0-209.0-105.03165-114.0-137.0284-1254.0-23.0-244.0-148.0-87.0-220.0-920.0-171.0-282.019-449.0
Percentage of NetIncomeLoss-82.3-66.8-86.893.6-30.6-68.258.910450.031.9-338.9-53.05.7-128.7147.0104.928.64.7165.7
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax-7.6-9.8-5.5144.2-4.6-7.716.0-63.0-1.1-12.7-8.1-3.5-7.2-34.1-6.2-11.10.5-17.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:OperatingSegments us-gaap:Corporate0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:NetIncomeLoss us-gaap:StatementEquityComponents

us-gaap:RetainedEarnings


Net
Period End2020-09-302020-06-302020-03-312019-09-302019-06-302019-03-31
Value249313121372201482
Percentage of NetIncomeLoss100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax9.314.76.314.911.327.1
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:RetainedEarnings0.00.00.00.00.00.0

Net Income Loss Available To Common Stockholders Basic

us-gaap:NetIncomeLossAvailableToCommonStockholdersBasic

us-gaap:NetIncomeLossAvailableToCommonStockholdersBasic


Net
Period End2021-06-302020-06-302019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value10783133383372201482-11.0-72.072279-1535.0171-626.0-163.0-987.0402-193.077-6319.061-19.0-125.070166-100.0-58.0-314.0122127-330.0514-3.0248-209.0-111.0-57.0618-262.0-17.022120856
Percentage of NetIncomeLossAvailableToCommonStockholdersBasic100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax20.614.7154.114.911.327.1-0.6-3.53.715.3-61.55.6-23.2-5.9-39.010.2-7.32.4-209.91.4-0.6-3.31.73.6-2.8-1.7-11.23.54.3-15.924.9-0.111.4-11.2-5.2-2.127.1-13.1-0.98.29.82.5

Net Income Loss Available To Common Stockholders Diluted

us-gaap:NetIncomeLossAvailableToCommonStockholdersDiluted

us-gaap:NetIncomeLossAvailableToCommonStockholdersDiluted


Net
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-312012-12-312012-09-302012-06-302011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value1078-82.0249313121372201482-72.072279514-3.0248-111.0-57.0618-262.0-17.022120856
Percentage of NetIncomeLossAvailableToCommonStockholdersDiluted100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax20.6-1.09.314.76.314.911.327.1-3.53.715.324.9-0.111.4-5.2-2.127.1-13.1-0.98.29.82.5

Nonoperating Income Expense

us-gaap:NonoperatingIncomeExpense

us-gaap:NonoperatingIncomeExpense


Nonoperating
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value-99.0-111.0-122.0-52.0-70.0-100.0-89.0-160.0-132.0-123.0-154.0-103.0-205.0-174.0-320.0-180.0-240.0-254.0-343.0-313.0-338.0-408.0-246.0-265.0-258.0-285.0-285.0-278.0-295.0-278.0-312.0-229.0-219.0-217.0400-191.0-151.0-156.0-146.0-178.0-278.0-679.0-161.0-142.0-117.0-135.0
Percentage of NonoperatingIncomeExpense100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax-1.9-1.40.0-1.9-3.3-5.2-4.1-6.4-7.4-6.9-7.7-5.0-10.6-9.5-12.8-5.9-8.9-9.2-13.5-7.9-12.8-12.6-8.2-6.0-7.6-7.4-6.8-6.1-8.1-8.0-11.2-6.6-7.5-10.419.4-8.2-7.0-8.4-6.8-6.7-12.2-34.0-8.9-5.3-5.5-6.1

us-gaap:NonoperatingIncomeExpense us-gaap:ConsolidatedEntities

srt:GuarantorSubsidiaries


Nonoperating
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-30
Value1.06.01.017273.010.0257.06.03.0-3.010.0
Percentage of NonoperatingIncomeExpense-1.9-8.6-1.0-19.1-16.9-2.3-8.1-16.2-6.8-2.9-1.70.9-5.6
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax0.00.30.10.81.10.20.61.30.30.30.2-0.10.3
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax srt:GuarantorSubsidiaries0.00.00.00.00.00.00.00.00.00.00.00.00.0

srt:NonGuarantorSubsidiaries


Nonoperating
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-30
Value3815-31.0-9.0-74.03.0-24.0-25.020-37.0-26.0-159.027
Percentage of NonoperatingIncomeExpense-73.1-21.431.010.146.2-2.319.516.2-19.418.014.949.7-15.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax1.40.7-1.6-0.4-3.00.2-1.3-1.31.0-1.9-1.4-6.40.9
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax srt:NonGuarantorSubsidiaries0.00.00.00.00.00.00.00.00.00.00.00.00.0

srt:ParentCompany


Nonoperating
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-30
Value449495195215444294200-10.0342249239-858.0352
Percentage of NonoperatingIncomeExpense-863.5-707.1-195.0-241.6-277.5-222.7-162.66.5-332.0-121.5-137.4268.1-195.6
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax16.723.310.19.817.716.511.2-0.516.512.913.1-34.411.5
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax srt:ParentCompany0.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:NonoperatingIncomeExpense us-gaap:ConsolidationItems

srt:ConsolidationEliminations


Nonoperating
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-30
Value-540.0-586.0-265.0-312.0-557.0-432.0-309.0-144.0-472.0-360.0-333.0781-500.0
Percentage of NonoperatingIncomeExpense1038.5837.1265.0350.6348.1327.3251.293.5458.3175.6191.4-244.1277.8
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax-20.1-27.6-13.8-14.2-22.2-24.2-17.4-7.2-22.7-18.7-18.331.3-16.4
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax srt:ConsolidationEliminations0.00.00.00.00.00.00.00.00.00.00.00.00.0

Operating Income Loss

us-gaap:OperatingIncomeLoss

us-gaap:OperatingIncomeLoss


Operating
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312009-09-302009-06-302009-03-31
Value1557-56.0-16.039348424420954032022149416334406-1345.037634347-791.075587476-4727.03792327645354989180-205.0535295-259.03786397-170.09.043269314152454444258314611619615
Percentage of OperatingIncomeLoss100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax29.7-0.70.014.622.812.79.521.617.912.42.520.017.322.3-53.912.312.71.7-31.219.13.314.7-157.08.66.82.010.812.02.55.2-7.315.310.1-12.41.83.718.3-9.10.41.611.815.78.416.920.811.614.721.027.737.1

us-gaap:OperatingIncomeLoss us-gaap:ConsolidatedEntities

srt:GuarantorSubsidiaries


Operating
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-30
Value49156726824456138623690421298426-1002.0332
Percentage of OperatingIncomeLoss124.9117.1109.8116.7103.9120.6106.8183.7101.289.2104.974.588.3
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax18.326.713.911.122.421.613.34.520.315.523.4-40.110.9
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax srt:GuarantorSubsidiaries0.00.00.00.00.00.00.00.00.00.00.00.00.0

srt:NonGuarantorSubsidiaries


Operating
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-30
Value11-1.0276444427316109-21.040-125.082
Percentage of OperatingIncomeLoss2.8-0.211.130.68.113.133.032.726.2-6.39.99.321.8
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax0.4-0.01.42.91.82.44.10.85.3-1.12.2-5.02.7
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax srt:NonGuarantorSubsidiaries0.00.00.00.00.00.00.00.00.00.00.00.00.0

srt:ParentCompany


Operating
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-30
Value-109.0-82.0-51.0-99.0-65.0-108.0-88.0-105.0-187.0-105.0-105.0-142.0-117.0
Percentage of OperatingIncomeLoss-27.7-16.9-20.9-47.4-12.0-33.8-39.8-214.3-45.0-31.4-25.910.6-31.1
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax-4.1-3.9-2.6-4.5-2.6-6.1-4.9-5.3-9.0-5.4-5.8-5.7-3.8
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax srt:ParentCompany0.00.00.00.00.00.00.00.00.00.00.00.00.0

Other Comprehensive Income Loss Foreign Currency Transaction And Translation Adjustment Net Of Tax

us-gaap:OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax

us-gaap:OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax


Other
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-30
Value2.03.06.04.013-15.03.0-4.0-1.01.0-3.0-2.0-4.0-2.02.02.01.07.0-7.03.0-3.06.0-1.0-8.09.0-11.0-5.0-6.0-3.06.0-10.05.0-19.00.00.01.0-8.06.03.0-27.010.0
Percentage of OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.00.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax0.00.00.00.10.6-0.80.1-0.2-0.10.1-0.2-0.1-0.2-0.10.10.10.00.3-0.30.1-0.10.2-0.0-0.20.3-0.3-0.1-0.1-0.10.2-0.40.1-0.60.00.00.0-0.40.30.1-1.00.4

us-gaap:OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax us-gaap:ConsolidatedEntities

srt:GuarantorSubsidiaries


Other
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-30
Value5.012-15.05.0-5.0-1.01.0-2.0-2.0-4.0-2.00.01.0
Percentage of OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax125.092.3100.0166.7125.0100.0100.066.7100.0100.0100.00.050.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax0.20.6-0.80.2-0.2-0.10.1-0.1-0.1-0.2-0.10.00.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax srt:GuarantorSubsidiaries0.00.00.00.00.00.00.00.00.00.00.00.00.0

srt:NonGuarantorSubsidiaries


Other
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-30
Value3.013-15.03.0-4.0-1.01.0-2.0-2.0-4.0-2.01.01.0
Percentage of OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax75.0100.0100.0100.0100.0100.0100.066.7100.0100.0100.050.050.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax0.10.6-0.80.1-0.2-0.10.1-0.1-0.1-0.2-0.10.00.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax srt:NonGuarantorSubsidiaries0.00.00.00.00.00.00.00.00.00.00.00.00.0

srt:ParentCompany


Other
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-30
Value4.013-15.03.0-4.0-1.01.0-4.0-1.0-5.0-3.0-10.04.0
Percentage of OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax100.0100.0100.0100.0100.0100.0100.0133.350.0125.0150.0-500.0200.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax0.10.6-0.80.1-0.2-0.10.1-0.2-0.0-0.3-0.2-0.40.1
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax srt:ParentCompany0.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax us-gaap:ConsolidationItems

srt:ConsolidationEliminations


Other
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-30
Value-8.0-25.030-8.09.02.0-2.05.03.09.05.012-4.0
Percentage of OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax-200.0-192.3-200.0-266.7-225.0-200.0-200.0-166.7-150.0-225.0-250.0600.0-200.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax-0.3-1.21.6-0.40.40.1-0.10.30.10.50.30.5-0.1
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax srt:ConsolidationEliminations0.00.00.00.00.00.00.00.00.00.00.00.00.0

Other Comprehensive Income Loss Net Of Tax

us-gaap:OtherComprehensiveIncomeLossNetOfTax

us-gaap:OtherComprehensiveIncomeLossNetOfTax


Other
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-30
Value213.0-16.04.013-15.0-34.0-59.0-3.0-2.0-36.01.01.011199.024117.061-8.0-22.015-18.021-17.0-173.0-7.0-5.05.0134-11.01814-82.0-51.0-88.0-3.0-127.0-104.0-58.0
Percentage of OtherComprehensiveIncomeLossNetOfTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax0.40.00.00.10.6-0.8-1.5-2.4-0.2-0.1-1.80.00.10.60.80.30.90.40.31.5-0.3-0.70.5-0.40.6-0.4-4.1-0.2-0.10.14.8-0.30.60.7-4.0-2.2-4.1-0.2-6.0-3.9-2.5

us-gaap:OtherComprehensiveIncomeLossNetOfTax us-gaap:ConsolidatedEntities

srt:GuarantorSubsidiaries


Other
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-30
Value7.013-13.028-45.0-1.01.0-11.0-2.0-4.0-2.0-74.063
Percentage of OtherComprehensiveIncomeLossNetOfTax175.0100.086.7-82.476.333.3-50.030.6-200.0-400.0-18.2-389.5700.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax0.30.6-0.71.3-1.8-0.10.1-0.6-0.1-0.2-0.1-3.02.1
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax srt:GuarantorSubsidiaries0.00.00.00.00.00.00.00.00.00.00.00.00.0

srt:NonGuarantorSubsidiaries


Other
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-30
Value3.013-15.03.0-4.0-1.01.0-3.08.00.014-52.069
Percentage of OtherComprehensiveIncomeLossNetOfTax75.0100.0100.0-8.86.833.3-50.08.3800.00.0127.3-273.7766.7
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax0.10.6-0.80.1-0.2-0.10.1-0.20.40.00.8-2.12.3
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax srt:NonGuarantorSubsidiaries0.00.00.00.00.00.00.00.00.00.00.00.00.0

srt:ParentCompany


Other
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-30
Value4.013-15.0-34.0-59.0-3.0-2.0-36.0-15.01.0111410.0
Percentage of OtherComprehensiveIncomeLossNetOfTax100.0100.0100.0100.0100.0100.0100.0100.0-1500.0100.0100.073.7111.1
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax0.10.6-0.8-1.5-2.4-0.2-0.1-1.8-0.70.10.60.60.3
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax srt:ParentCompany0.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:OtherComprehensiveIncomeLossNetOfTax us-gaap:ConsolidationItems

srt:ConsolidationEliminations


Other
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-30
Value-10.0-26.028-31.0492.0-2.01410.04.0-12.0132-133.0
Percentage of OtherComprehensiveIncomeLossNetOfTax-250.0-200.0-186.791.2-83.1-66.7100.0-38.91000.0400.0-109.1694.7-1477.8
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax-0.4-1.21.5-1.42.00.1-0.10.70.50.2-0.75.3-4.4
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax srt:ConsolidationEliminations0.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:OtherComprehensiveIncomeLossNetOfTax us-gaap:StatementEquityComponents

us-gaap:AccumulatedOtherComprehensiveIncome


Other
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-31
Value213.04.013-15.0-59.0-3.0-2.0
Percentage of OtherComprehensiveIncomeLossNetOfTax100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax0.40.00.10.6-0.8-2.4-0.2-0.1
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:AccumulatedOtherComprehensiveIncome0.00.00.00.00.00.00.00.0

Other Nonoperating Income Expense

us-gaap:OtherNonoperatingIncomeExpense

us-gaap:OtherNonoperatingIncomeExpense


Other
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value122215111427171720122217-20.0-3.05.01510.0127.09.08.0186.04.04.0199.0-3.05.0114.05.00.04.05.010.02.02.06.05.03.05.0-1.011194.0
Percentage of OtherNonoperatingIncomeExpense100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax0.20.30.00.40.71.40.80.71.10.71.10.8-1.0-0.20.20.50.40.40.30.20.30.60.20.10.10.50.2-0.10.10.30.10.10.00.20.20.40.10.10.30.20.10.3-0.10.40.90.2

us-gaap:OtherNonoperatingIncomeExpense us-gaap:ConsolidatedEntities

srt:GuarantorSubsidiaries


Other
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-30
Value4.07.03.04.0114.04.0194.03.05.02.07.0
Percentage of OtherNonoperatingIncomeExpense36.450.011.123.564.720.033.386.423.5-15.0-166.740.046.7
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax0.10.30.20.20.40.20.21.00.20.20.30.10.2
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax srt:GuarantorSubsidiaries0.00.00.00.00.00.00.00.00.00.00.00.00.0

srt:NonGuarantorSubsidiaries


Other
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-30
Value2.05.0-1.02.01.08.01.0148.0-29.0-7.0-68.038
Percentage of OtherNonoperatingIncomeExpense18.235.7-3.711.85.940.08.363.647.1145.0233.3-1360.0253.3
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax0.10.2-0.10.10.00.40.10.70.4-1.5-0.4-2.71.2
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax srt:NonGuarantorSubsidiaries0.00.00.00.00.00.00.00.00.00.00.00.00.0

srt:ParentCompany


Other
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-30
Value5.02.025115.08.07.0-11.05.03.02.05.08.0
Percentage of OtherNonoperatingIncomeExpense45.514.392.664.729.440.058.3-50.029.4-15.0-66.7100.053.3
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax0.20.11.30.50.20.40.4-0.60.20.20.10.20.3
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax srt:ParentCompany0.00.00.00.00.00.00.00.00.00.00.00.00.0

Profit Loss

us-gaap:ProfitLoss

us-gaap:ProfitLoss


Profit
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value1078-82.0-173.02493131213385372202482-13.0-48.096233-1655.0163-642.0-203.0-1055.0393-276.047-6358.067-9.0-136.097182-80.0-67.0-290.0143137-327.05188.0259-206.0-109.0-55.0621-260.0-15.022321058
Percentage of ProfitLoss100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax20.6-1.00.09.314.76.3154.214.911.327.1-0.7-2.35.012.8-66.35.3-23.8-7.4-41.79.9-10.51.5-211.21.5-0.3-3.62.34.0-2.2-1.9-10.44.14.7-15.725.10.312.0-11.1-5.1-2.127.3-13.0-0.88.39.82.6

us-gaap:ProfitLoss us-gaap:ConsolidatedEntities

srt:GuarantorSubsidiaries


Profit
Period End2020-09-302020-06-302019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-30
Value492573261588389255148306211331-316.0342
Percentage of ProfitLoss197.6183.17.7158.1192.652.9-1138.5-637.5219.8142.119.1209.8
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax18.327.011.923.521.814.37.414.710.918.2-12.711.2
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax srt:GuarantorSubsidiaries0.00.00.00.00.00.00.00.00.00.00.00.0

srt:NonGuarantorSubsidiaries


Profit
Period End2020-09-302020-06-302019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-30
Value481353-31.04454-4.010593-61.0-515.0121
Percentage of ProfitLoss19.34.21.6-8.321.811.230.8-218.896.9-26.231.174.2
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax1.80.62.4-1.22.53.0-0.25.14.8-3.3-20.64.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax srt:NonGuarantorSubsidiaries0.00.00.00.00.00.00.00.00.00.00.00.0

srt:ParentCompany


Profit
Period End2020-09-302020-06-302019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-30
Value2493133383372201482-13.0-60.0150296-1605.0200
Percentage of ProfitLoss100.0100.099.9100.099.5100.0100.0125.0156.2127.097.0122.7
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax9.314.7154.114.911.327.1-0.7-2.97.816.2-64.36.6
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax srt:ParentCompany0.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:ProfitLoss us-gaap:ConsolidationItems

srt:ConsolidationEliminations


Profit
Period End2020-09-302020-06-302019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-30
Value-540.0-586.0-312.0-557.0-432.0-309.0-144.0-399.0-358.0-333.0781-500.0
Percentage of ProfitLoss-216.9-187.2-9.2-149.7-213.9-64.11107.7831.2-372.9-142.9-47.2-306.7
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax-20.1-27.6-14.2-22.2-24.2-17.4-7.2-19.2-18.6-18.331.3-16.4
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax srt:ConsolidationEliminations0.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:ProfitLoss us-gaap:StatementEquityComponents

us-gaap:RetainedEarnings


Profit
Period End2021-06-302021-03-312020-06-302020-03-31
Value1078-82.0313121
Percentage of ProfitLoss100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax20.6-1.014.76.3
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:RetainedEarnings0.00.00.00.0

Research And Development Expense

us-gaap:ResearchAndDevelopmentExpense

us-gaap:ResearchAndDevelopmentExpense


Research
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-31
Value2.01.02.03.02.01.02.02.02.01.016131814181723231826413841342922211921242118
Percentage of ResearchAndDevelopmentExpense100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax0.00.00.10.20.10.00.10.10.10.00.80.70.70.50.70.60.90.60.70.81.40.91.20.90.70.50.60.50.80.70.70.9

us-gaap:ResearchAndDevelopmentExpense us-gaap:ConsolidatedEntities

srt:NonGuarantorSubsidiaries


Research
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-30
Value-1.01.00.0-1.00.01.00.01.0-2.01.01.00.01.0
Percentage of ResearchAndDevelopmentExpense-100.050.00.0-50.00.050.00.050.0-200.06.27.70.07.1
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax-0.00.00.0-0.00.00.10.00.1-0.10.10.10.00.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax srt:NonGuarantorSubsidiaries0.00.00.00.00.00.00.00.00.00.00.00.00.0

srt:ParentCompany


Research
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-30
Value2.01.03.03.01.01.02.01.03.03.04.04.05.0
Percentage of ResearchAndDevelopmentExpense200.050.0100.0150.0100.050.0100.050.0300.018.830.822.235.7
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax0.10.00.20.10.00.10.10.10.10.20.20.20.2
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax srt:ParentCompany0.00.00.00.00.00.00.00.00.00.00.00.00.0

Revenue From Contract With Customer Excluding Assessed Tax

us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax

us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax


Revenue
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312009-09-302009-06-302009-03-31
Value52367929195726842124192521952504178317791992207519281823249730492701275925323952263832293011443133973826419245693621348627953490292920812063233121661862213226742278199518162685213322152141291622371658
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:ConsolidationItems

us-gaap:IntersegmentElimination


Revenue
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-30
Value-1.0-3.0-1.0-3.0-1.0-2.0-3.00.0-1.0-3.0898-480.0-269.0-182.0-12.0-523.0-194.0-244.0-232.0-562.0-186.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax-0.0-0.0-0.1-0.1-0.0-0.1-0.10.0-0.1-0.245.1-23.1-14.0-10.0-0.5-17.2-7.2-8.8-9.2-14.2-7.1
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax-0.0-0.0-0.1-0.1-0.0-0.1-0.10.0-0.1-0.245.1-23.1-14.0-10.0-0.5-17.2-7.2-8.8-9.2-14.2-7.1
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:IntersegmentElimination100.0100.0100.0100.0100.0100.0100.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

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

us-gaap:IntersegmentElimination, nrg:HomeCustomer, nrg:ProductsAndServicesRetailRevenue


Revenue
Period End2021-06-302020-06-302020-03-31
Value-1.00.0-1.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax-0.00.0-0.1
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax-0.00.0-0.1
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:IntersegmentElimination nrg:HomeCustomer nrg:ProductsAndServicesRetailRevenue100.00.0100.0

us-gaap:IntersegmentElimination, nrg:MassCustomer, nrg:ProductsAndServicesRetailRevenue


Revenue
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value-1.00.00.0-1.0-2.00.0-1.0-1.0-1.0-2.0-1.0-1.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax-0.10.00.0-0.1-0.10.0-0.1-0.1-0.1-0.1-0.1-0.1
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax-0.10.00.0-0.1-0.10.0-0.1-0.1-0.1-0.1-0.1-0.1
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:IntersegmentElimination nrg:MassCustomer nrg:ProductsAndServicesRetailRevenue100.00.00.0100.0100.00.0100.0100.0100.0100.0100.0100.0

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

us-gaap:OperatingSegments, nrg:BusinessSolutionsCustomers, nrg:ProductsAndServicesRetailRevenue, nrg:East


Revenue
Period End2020-09-302020-06-302020-03-312019-09-302019-06-302019-03-31
Value272023191818
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax1.00.91.20.81.01.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax1.00.91.20.81.01.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:OperatingSegments nrg:BusinessSolutionsCustomers nrg:ProductsAndServicesRetailRevenue nrg:East100.0100.0100.0100.0100.0100.0

us-gaap:OperatingSegments, nrg:BusinessSolutionsCustomers, nrg:ProductsAndServicesRetailRevenue, nrg:EastSegment


Revenue
Period End2021-06-302021-03-312020-06-302020-03-31
Value189028412023
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax36.135.80.91.2
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax36.135.80.91.2
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:OperatingSegments nrg:BusinessSolutionsCustomers nrg:ProductsAndServicesRetailRevenue nrg:EastSegment100.0100.0100.0100.0

us-gaap:OperatingSegments, nrg:BusinessSolutionsCustomers, nrg:ProductsAndServicesRetailRevenue, nrg:TexasSegment


Revenue
Period End2021-06-302021-03-312020-06-302020-03-31
Value582572248260
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax11.17.211.713.5
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax11.17.211.713.5
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:OperatingSegments nrg:BusinessSolutionsCustomers nrg:ProductsAndServicesRetailRevenue nrg:TexasSegment100.0100.0100.0100.0

us-gaap:OperatingSegments, nrg:BusinessSolutionsCustomers, nrg:ProductsAndServicesRetailRevenue, nrg:WestServicesAndOtherSegment


Revenue
Period End2021-06-302021-03-31
Value7131
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax1.40.4
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax1.40.4
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:OperatingSegments nrg:BusinessSolutionsCustomers nrg:ProductsAndServicesRetailRevenue nrg:WestServicesAndOtherSegment100.0100.0

us-gaap:OperatingSegments, nrg:BusinessSolutionsCustomers, nrg:ProductsAndServicesRetailRevenue, stpr:TX


Revenue
Period End2020-09-302020-06-302020-03-312019-09-302019-06-302019-03-31
Value288248260397272258
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax10.711.713.515.915.314.5
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax10.711.713.515.915.314.5
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:OperatingSegments nrg:BusinessSolutionsCustomers nrg:ProductsAndServicesRetailRevenue stpr:TX100.0100.0100.0100.0100.0100.0

us-gaap:OperatingSegments, nrg:HomeCustomer, nrg:ProductsAndServicesRetailRevenue, nrg:EastSegment


Revenue
Period End2021-06-302021-03-312020-06-302020-03-31
Value476702270329
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax9.18.912.717.1
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax9.18.912.717.1
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:OperatingSegments nrg:HomeCustomer nrg:ProductsAndServicesRetailRevenue nrg:EastSegment100.0100.0100.0100.0

us-gaap:OperatingSegments, nrg:HomeCustomer, nrg:ProductsAndServicesRetailRevenue, nrg:TexasSegment


Revenue
Period End2021-06-302021-03-312020-06-302020-03-31
Value1376154212731032
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax26.319.459.953.6
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax26.319.459.953.6
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:OperatingSegments nrg:HomeCustomer nrg:ProductsAndServicesRetailRevenue nrg:TexasSegment100.0100.0100.0100.0

us-gaap:OperatingSegments, nrg:HomeCustomer, nrg:ProductsAndServicesRetailRevenue, nrg:WestServicesAndOtherSegment


Revenue
Period End2021-06-302021-03-312020-06-302020-03-31
Value4224742118
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax8.16.01.00.9
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax8.16.01.00.9
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:OperatingSegments nrg:HomeCustomer nrg:ProductsAndServicesRetailRevenue nrg:WestServicesAndOtherSegment100.0100.0100.0100.0

us-gaap:OperatingSegments, nrg:MassCustomer, nrg:ProductsAndServicesRetailRevenue, nrg:East


Revenue
Period End2020-09-302020-06-302020-03-312019-09-302019-06-302019-03-31
Value354291347337235320
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax13.213.718.013.513.218.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax13.213.718.013.513.218.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:OperatingSegments nrg:MassCustomer nrg:ProductsAndServicesRetailRevenue nrg:East100.0100.0100.0100.0100.0100.0

us-gaap:OperatingSegments, nrg:MassCustomer, nrg:ProductsAndServicesRetailRevenue, stpr:TX


Revenue
Period End2020-09-302020-06-302020-03-312019-09-302019-06-302019-03-31
Value16331273103217351161995
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax60.859.953.669.365.155.9
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax60.859.953.669.365.155.9
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:OperatingSegments nrg:MassCustomer nrg:ProductsAndServicesRetailRevenue stpr:TX100.0100.0100.0100.0100.0100.0

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

us-gaap:IntersegmentElimination, nrg:EnergyRevenue


Revenue
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value1.01.00.01.0-1.0-1.0-289.0-568.0-365.0-276.0-239.0-479.0-250.0-161.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax0.00.00.00.0-0.0-0.1-13.2-22.7-20.5-15.5-12.0-23.1-13.0-8.8
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax0.00.00.00.0-0.0-0.1-13.2-22.7-20.5-15.5-12.0-23.1-13.0-8.8
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:IntersegmentElimination nrg:EnergyRevenue100.0100.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:IntersegmentElimination, nrg:ProductsAndServicesOther


Revenue
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value-2.0-3.0-1.0-4.0-1.0-2.00.0-2.00.0-2.01.00.0-16.0-19.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax-0.0-0.0-0.1-0.1-0.0-0.10.0-0.10.0-0.10.10.0-0.8-1.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax-0.0-0.0-0.1-0.1-0.0-0.10.0-0.10.0-0.10.10.0-0.8-1.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:IntersegmentElimination nrg:ProductsAndServicesOther100.0100.0100.0100.0100.0100.00.0100.00.0100.0100.00.0100.0100.0

us-gaap:IntersegmentElimination, nrg:ProductsAndServicesRetailRevenue


Revenue
Period End2021-06-302020-09-302020-06-302020-03-312019-09-302019-06-30
Value-1.00.00.0-1.00.0-1.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax-0.00.00.0-0.10.0-0.1
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax-0.00.00.0-0.10.0-0.1
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:IntersegmentElimination nrg:ProductsAndServicesRetailRevenue100.00.00.0100.00.0100.0

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

us-gaap:OperatingSegments, nrg:CapacityRevenue, nrg:East


Revenue
Period End2020-09-302020-06-302020-03-312019-09-302019-06-302019-03-31
Value158179134185195144
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax5.98.47.07.410.98.1
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax5.98.47.07.410.98.1
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:OperatingSegments nrg:CapacityRevenue nrg:East100.0100.0100.0100.0100.0100.0

us-gaap:OperatingSegments, nrg:CapacityRevenue, nrg:EastSegment


Revenue
Period End2021-06-302021-03-312020-06-302020-03-31
Value255141179134
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax4.91.88.47.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax4.91.88.47.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:OperatingSegments nrg:CapacityRevenue nrg:EastSegment100.0100.0100.0100.0

us-gaap:OperatingSegments, nrg:CapacityRevenue, nrg:WestAndOther


Revenue
Period End2020-09-302020-06-302020-03-312019-09-302019-06-302019-03-31
Value1616159.06.012
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax0.60.80.80.40.30.7
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax0.60.80.80.40.30.7
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:OperatingSegments nrg:CapacityRevenue nrg:WestAndOther100.0100.0100.0100.0100.0100.0

us-gaap:OperatingSegments, nrg:CapacityRevenue, nrg:WestServicesAndOtherSegment


Revenue
Period End2021-06-302021-03-312020-06-302020-03-31
Value16141615
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax0.30.20.80.8
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax0.30.20.80.8
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:OperatingSegments nrg:CapacityRevenue nrg:WestServicesAndOtherSegment100.0100.0100.0100.0

us-gaap:OperatingSegments, nrg:EnergyRevenue, nrg:East


Revenue
Period End2020-09-302020-06-302020-03-312019-09-302019-06-302019-03-31
Value93194510948126
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax3.50.92.34.42.77.1
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax3.50.92.34.42.77.1
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:OperatingSegments nrg:EnergyRevenue nrg:East100.0100.0100.0100.0100.0100.0

us-gaap:OperatingSegments, nrg:EnergyRevenue, nrg:EastSegment


Revenue
Period End2021-06-302021-03-312020-06-302020-03-31
Value1011261945
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax1.91.60.92.3
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax1.91.60.92.3
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:OperatingSegments nrg:EnergyRevenue nrg:EastSegment100.0100.0100.0100.0

us-gaap:OperatingSegments, nrg:EnergyRevenue, nrg:TexasSegment


Revenue
Period End2021-06-302021-03-312020-06-302020-03-31
Value142855.05.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax0.33.60.20.3
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax0.33.60.20.3
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:OperatingSegments nrg:EnergyRevenue nrg:TexasSegment100.0100.0100.0100.0

us-gaap:OperatingSegments, nrg:EnergyRevenue, nrg:WestAndOther


Revenue
Period End2020-09-302020-06-302020-03-312019-09-302019-06-302019-03-31
Value11760751075258
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax4.42.83.94.32.93.3
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax4.42.83.94.32.93.3
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:OperatingSegments nrg:EnergyRevenue nrg:WestAndOther100.0100.0100.0100.0100.0100.0

us-gaap:OperatingSegments, nrg:EnergyRevenue, nrg:WestServicesAndOtherSegment


Revenue
Period End2021-06-302021-03-312020-06-302020-03-31
Value55706075
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax1.10.92.83.9
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax1.10.92.83.9
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:OperatingSegments nrg:EnergyRevenue nrg:WestServicesAndOtherSegment100.0100.0100.0100.0

us-gaap:OperatingSegments, nrg:EnergyRevenue, stpr:TX


Revenue
Period End2020-09-302020-06-302020-03-312019-09-302019-06-302019-03-31
Value115.05.0211136105
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax0.40.20.38.47.65.9
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax0.40.20.38.47.65.9
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:OperatingSegments nrg:EnergyRevenue stpr:TX100.0100.0100.0100.0100.0100.0

us-gaap:OperatingSegments, nrg:ProductsAndServicesOther, nrg:East


Revenue
Period End2020-09-302020-06-302020-03-312019-09-302019-06-302019-03-31
Value181710.0171216
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax0.70.80.50.70.70.9
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax0.70.80.50.70.70.9
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:OperatingSegments nrg:ProductsAndServicesOther nrg:East100.0100.0100.0100.0100.0100.0

us-gaap:OperatingSegments, nrg:ProductsAndServicesOther, nrg:EastSegment


Revenue
Period End2021-06-302021-03-312020-06-302020-03-31
Value10.0191710.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax0.20.20.80.5
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax0.20.20.80.5
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:OperatingSegments nrg:ProductsAndServicesOther nrg:EastSegment100.0100.0100.0100.0

us-gaap:OperatingSegments, nrg:ProductsAndServicesOther, nrg:TexasSegment


Revenue
Period End2021-06-302021-03-312020-06-302020-03-31
Value5613045261
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax1.116.42.43.2
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax1.116.42.43.2
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:OperatingSegments nrg:ProductsAndServicesOther nrg:TexasSegment100.0100.0100.0100.0

us-gaap:OperatingSegments, nrg:ProductsAndServicesOther, nrg:WestAndOther


Revenue
Period End2020-09-302020-06-302020-03-312019-09-302019-06-302019-03-31
Value-1.017204.03219
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax-0.00.81.00.21.81.1
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax-0.00.81.00.21.81.1
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:OperatingSegments nrg:ProductsAndServicesOther nrg:WestAndOther100.0100.0100.0100.0100.0100.0

us-gaap:OperatingSegments, nrg:ProductsAndServicesOther, nrg:WestServicesAndOtherSegment


Revenue
Period End2021-06-302021-03-312020-06-302020-03-31
Value7.04.01720
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax0.10.10.81.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax0.10.10.81.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:OperatingSegments nrg:ProductsAndServicesOther nrg:WestServicesAndOtherSegment100.0100.0100.0100.0

us-gaap:OperatingSegments, nrg:ProductsAndServicesOther, stpr:TX


Revenue
Period End2020-09-302020-06-302020-03-312019-09-302019-06-302019-03-31
Value595261785877
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax2.22.43.23.13.34.3
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax2.22.43.23.13.34.3
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:OperatingSegments nrg:ProductsAndServicesOther stpr:TX100.0100.0100.0100.0100.0100.0

us-gaap:OperatingSegments, nrg:ProductsAndServicesRetailRevenue, nrg:East


Revenue
Period End2020-09-302020-06-302019-09-302019-06-30
Value381311356253
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax14.214.614.214.2
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax14.214.614.214.2
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:OperatingSegments nrg:ProductsAndServicesRetailRevenue nrg:East100.0100.0100.0100.0

us-gaap:OperatingSegments, nrg:ProductsAndServicesRetailRevenue, nrg:EastSegment


Revenue
Period End2021-06-302021-03-312020-06-302020-03-31
Value23663543290352
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax45.244.713.718.3
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax45.244.713.718.3
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:OperatingSegments nrg:ProductsAndServicesRetailRevenue nrg:EastSegment100.0100.0100.0100.0

us-gaap:OperatingSegments, nrg:ProductsAndServicesRetailRevenue, nrg:TexasSegment


Revenue
Period End2021-06-302021-03-312020-06-302020-03-31
Value1958211415211292
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax37.426.771.667.1
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax37.426.771.667.1
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:OperatingSegments nrg:ProductsAndServicesRetailRevenue nrg:TexasSegment100.0100.0100.0100.0

us-gaap:OperatingSegments, nrg:ProductsAndServicesRetailRevenue, nrg:WestServicesAndOtherSegment


Revenue
Period End2021-06-302021-03-312020-06-302020-03-31
Value4935052118
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax9.46.41.00.9
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax9.46.41.00.9
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:OperatingSegments nrg:ProductsAndServicesRetailRevenue nrg:WestServicesAndOtherSegment100.0100.0100.0100.0

us-gaap:OperatingSegments, nrg:ProductsAndServicesRetailRevenue, stpr:TX


Revenue
Period End2020-09-302020-06-302019-09-302019-06-30
Value1921152121321433
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax71.671.685.180.4
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax71.671.685.180.4
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:OperatingSegments nrg:ProductsAndServicesRetailRevenue stpr:TX100.0100.0100.0100.0

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

us-gaap:OperatingSegments, nrg:East


Revenue
Period End2020-09-302020-06-302020-03-312019-09-302019-06-302019-03-31
Value578480500610459555
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax21.522.626.024.425.731.2
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax21.522.626.024.425.731.2
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:OperatingSegments nrg:East100.0100.0100.0100.0100.0100.0

us-gaap:OperatingSegments, nrg:EastSegment


Revenue
Period End2021-06-302021-03-312020-06-302020-03-31
Value26513726459482
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax50.647.021.625.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax50.647.021.625.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:OperatingSegments nrg:EastSegment100.0100.0100.0100.0

us-gaap:OperatingSegments, nrg:TexasSegment


Revenue
Period End2021-06-302021-03-312020-06-302020-03-31
Value2027360915711351
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax38.745.574.070.2
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax38.745.574.070.2
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:OperatingSegments nrg:TexasSegment100.0100.0100.0100.0

us-gaap:OperatingSegments, nrg:WestAndOther


Revenue
Period End2020-09-302020-06-302020-03-312019-09-302019-06-302019-03-31
Value12774761066876
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax4.73.53.94.23.84.3
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax4.73.53.94.23.84.3
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:OperatingSegments nrg:WestAndOther100.0100.0100.0100.0100.0100.0

us-gaap:OperatingSegments, nrg:WestServicesAndOtherSegment


Revenue
Period End2021-06-302021-03-312020-06-302020-03-31
Value5595979594
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax10.77.54.54.9
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax10.77.54.54.9
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:OperatingSegments nrg:WestServicesAndOtherSegment100.0100.0100.0100.0

us-gaap:OperatingSegments, stpr:TX


Revenue
Period End2020-09-302020-06-302020-03-312019-09-302019-06-302019-03-31
Value198215711351178812581151
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax73.874.070.271.470.664.7
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax73.874.070.271.470.664.7
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:OperatingSegments stpr:TX100.0100.0100.0100.0100.0100.0

us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:MajorCustomers, us-gaap:ProductOrService

nrg:BusinessSolutionsCustomers, nrg:ProductsAndServicesRetailRevenue


Revenue
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value25433444263315268283307465345286311434437310
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax48.643.413.411.712.614.714.018.619.316.115.620.922.717.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax48.643.413.411.712.614.714.018.619.316.115.620.922.717.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax nrg:BusinessSolutionsCustomers nrg:ProductsAndServicesRetailRevenue100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

nrg:HomeCustomer, nrg:ProductsAndServicesRetailRevenue


Revenue
Period End2021-06-302021-03-312020-06-302020-03-31
Value2273271815641378
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax43.434.373.671.6
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax43.434.373.671.6
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax nrg:HomeCustomer nrg:ProductsAndServicesRetailRevenue100.0100.0100.0100.0

nrg:MassCustomer, nrg:ProductsAndServicesRetailRevenue


Revenue
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value140219871564137814732080140013201296176613791175
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax71.674.073.671.667.183.178.574.265.185.171.564.5
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax71.674.073.671.667.183.178.574.265.185.171.564.5
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax nrg:MassCustomer nrg:ProductsAndServicesRetailRevenue100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:ProductOrService

nrg:CapacityRevenue


Revenue
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value271155162174195149146152155154-18.0254313288
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax5.22.08.36.59.27.76.76.18.78.7-0.912.216.215.8
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax5.22.08.36.59.27.76.76.18.78.7-0.912.216.215.8
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax nrg:CapacityRevenue100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

nrg:EnergyRevenue


Revenue
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value17148211022283124225442249306145479673619
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax3.36.15.68.33.96.410.317.714.017.27.323.134.934.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax3.36.15.68.33.96.410.317.714.017.27.323.134.934.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax nrg:EnergyRevenue100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

nrg:ProductsAndServicesOther


Revenue
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value71132473728589626775796068119148
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax1.416.73.72.74.04.62.82.74.24.43.03.36.28.1
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax1.416.73.72.74.04.62.82.74.24.43.03.36.28.1
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax nrg:ProductsAndServicesOther100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

nrg:ProductsAndServicesRetailRevenue


Revenue
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-09-302019-06-30
Value4816616223021832166124881685
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax92.077.785.886.386.399.494.5
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax92.077.785.886.386.399.494.5
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax nrg:ProductsAndServicesRetailRevenue100.0100.0100.0100.0100.0100.0100.0

Revenues

us-gaap:Revenues

us-gaap:Revenues


Revenues
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312009-09-302009-06-302009-03-31
Value52438091202728092238201921952996246521651992306129222421249730492701275925323952263832293011443133973826419245693621348627953490292920812063233121661862213226742278199518162685213322152141291622371658
Percentage of Revenues100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax100.1102.0103.6104.7105.4104.9100.0119.6138.3121.7100.0147.5151.6132.8100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:Revenues us-gaap:BusinessAcquisition

nrg:DirectEnergy


Revenuesus-gaap:
Period End2021-06-30
Value2958
Percentage of Revenues56.4
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax56.5
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax nrg:DirectEnergy0.0

us-gaap:Revenues us-gaap:ConsolidatedEntities

srt:GuarantorSubsidiaries


Revenuesus-gaap:
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-30
Value2513205517781659247321401769138326182172174415772366
Percentage of Revenues89.591.888.175.682.586.881.769.485.574.372.063.277.6
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax93.696.892.475.698.8120.099.469.4126.2112.795.763.277.6
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax srt:GuarantorSubsidiaries0.00.00.00.00.00.00.00.00.00.00.00.00.0

srt:NonGuarantorSubsidiaries


Revenuesus-gaap:
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-30
Value297181252539525332395313445291329262386
Percentage of Revenues10.68.112.524.617.513.518.215.714.510.013.610.512.7
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax11.18.513.124.621.018.622.215.721.415.118.010.512.7
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax srt:NonGuarantorSubsidiaries0.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:Revenues us-gaap:ConsolidationItems

srt:ConsolidationEliminations


Revenuesus-gaap:
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-30
Value-1.02.0-11.0-3.0-2.0-7.01.0-13.0-2.0-2.0-8.0-11.0-12.0
Percentage of Revenues-0.00.1-0.5-0.1-0.1-0.30.0-0.7-0.1-0.1-0.3-0.4-0.4
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax-0.00.1-0.6-0.1-0.1-0.40.1-0.7-0.1-0.1-0.4-0.4-0.4
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax srt:ConsolidationEliminations0.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:IntersegmentElimination


Revenuesus-gaap:
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-30
Value3.0-1.0-3.02.00.0-3.0-269.0-522.0-650.0-266.0-140.0-722.0-540.0300-12.0-523.0-194.0-244.0-232.0-562.0-186.0
Percentage of Revenues0.1-0.0-0.10.10.0-0.1-12.3-17.4-26.4-12.3-7.0-23.6-18.512.4-0.5-17.2-7.2-8.8-9.2-14.2-7.1
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax0.1-0.0-0.20.10.0-0.2-12.3-20.8-36.5-15.0-7.0-34.8-28.016.5-0.5-17.2-7.2-8.8-9.2-14.2-7.1
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:IntersegmentElimination-300.033.3300.0-66.7-0.0150.08966.70.065000.08866.7-15.6150.4200.7-164.8100.0100.0100.0100.0100.0100.0100.0

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

us-gaap:IntersegmentElimination, nrg:OperatingRevenues


Revenuesus-gaap:
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value3.0-1.0-3.02.00.0-3.0-269.0-522.0-650.0-265.0-139.0-721.0-533.0302
Percentage of Revenues0.1-0.0-0.10.10.0-0.1-12.3-17.4-26.4-12.2-7.0-23.6-18.212.5
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax0.1-0.0-0.20.10.0-0.2-12.3-20.8-36.5-14.9-7.0-34.7-27.616.6
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:IntersegmentElimination nrg:OperatingRevenues0.00.00.00.00.00.00.00.00.00.00.00.00.00.0

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

us-gaap:OperatingSegments, nrg:OperatingRevenues, nrg:East


Revenuesus-gaap:
Period End2020-09-302020-06-302020-03-312019-09-302019-06-302019-03-31
Value693566539679524609
Percentage of Revenues24.725.326.722.721.328.1
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax25.826.628.027.129.434.2
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:OperatingSegments nrg:OperatingRevenues nrg:East0.00.00.00.00.00.0

us-gaap:OperatingSegments, nrg:OperatingRevenues, nrg:EastSegment


Revenuesus-gaap:
Period End2021-06-302021-03-312020-06-302020-03-31
Value26783825545521
Percentage of Revenues51.147.324.425.8
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax51.148.225.727.1
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:OperatingSegments nrg:OperatingRevenues nrg:EastSegment0.00.00.00.0

us-gaap:OperatingSegments, nrg:OperatingRevenues, nrg:TexasSegment


Revenuesus-gaap:
Period End2021-06-302021-03-312020-06-302020-03-31
Value2025370215781358
Percentage of Revenues38.645.870.567.3
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax38.746.774.370.5
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:OperatingSegments nrg:OperatingRevenues nrg:TexasSegment0.00.00.00.0

us-gaap:OperatingSegments, nrg:OperatingRevenues, nrg:WestAndOther


Revenuesus-gaap:
Period End2020-09-302020-06-302020-03-312019-09-302019-06-302019-03-31
Value1229412511110693
Percentage of Revenues4.34.26.23.74.34.3
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax4.54.46.54.45.95.2
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:OperatingSegments nrg:OperatingRevenues nrg:WestAndOther0.00.00.00.00.00.0

us-gaap:OperatingSegments, nrg:OperatingRevenues, nrg:WestServicesAndOtherSegment


Revenuesus-gaap:
Period End2021-06-302021-03-312020-06-302020-03-31
Value537565115143
Percentage of Revenues10.27.05.17.1
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax10.37.15.47.4
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:OperatingSegments nrg:OperatingRevenues nrg:WestServicesAndOtherSegment0.00.00.00.0

us-gaap:OperatingSegments, nrg:OperatingRevenues, stpr:TX


Revenuesus-gaap:
Period End2020-09-302020-06-302020-03-312019-09-302019-06-302019-03-31
Value199215781358220818371466
Percentage of Revenues70.970.567.373.774.567.7
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax74.274.370.588.2103.082.4
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:OperatingSegments nrg:OperatingRevenues stpr:TX0.00.00.00.00.00.0

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

us-gaap:OperatingSegments, nrg:East


Revenuesus-gaap:
Period End2020-09-302020-06-302020-03-312019-09-302019-06-302019-03-31
Value693566539679524609
Percentage of Revenues24.725.326.722.721.328.1
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax25.826.628.027.129.434.2
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:OperatingSegments nrg:East119.9117.9107.8111.3114.2109.7

us-gaap:OperatingSegments, nrg:EastSegment


Revenuesus-gaap:
Period End2021-06-302021-03-312020-06-302020-03-31
Value26783825545521
Percentage of Revenues51.147.324.425.8
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax51.148.225.727.1
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:OperatingSegments nrg:EastSegment101.0102.7118.7108.1

us-gaap:OperatingSegments, nrg:TexasSegment


Revenuesus-gaap:
Period End2021-06-302021-03-312020-06-302020-03-31
Value2025370215781358
Percentage of Revenues38.645.870.567.3
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax38.746.774.370.5
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:OperatingSegments nrg:TexasSegment99.9102.6100.4100.5

us-gaap:OperatingSegments, nrg:WestAndOther


Revenuesus-gaap:
Period End2020-09-302020-06-302020-03-312019-09-302019-06-302019-03-31
Value1229412511110693
Percentage of Revenues4.34.26.23.74.34.3
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax4.54.46.54.45.95.2
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:OperatingSegments nrg:WestAndOther96.1127.0164.5104.7155.9122.4

us-gaap:OperatingSegments, nrg:WestServicesAndOtherSegment


Revenuesus-gaap:
Period End2021-06-302021-03-312020-06-302020-03-31
Value537565115143
Percentage of Revenues10.27.05.17.1
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax10.37.15.47.4
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:OperatingSegments nrg:WestServicesAndOtherSegment96.194.6121.1152.1

us-gaap:OperatingSegments, stpr:TX


Revenuesus-gaap:
Period End2020-09-302020-06-302020-03-312019-09-302019-06-302019-03-31
Value199215781358220818371466
Percentage of Revenues70.970.567.373.774.567.7
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax74.274.370.588.2103.082.4
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:OperatingSegments stpr:TX100.5100.4100.5123.5146.0127.4

us-gaap:Revenues us-gaap:ProductOrService

nrg:OperatingRevenues


Revenuesus-gaap:
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value52438091202728092238201921952996246521651683306129222421
Percentage of Revenues100.0100.0100.0100.0100.0100.0100.0100.0100.0100.084.5100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax100.1102.0103.6104.7105.4104.9100.0119.6138.3121.784.5147.5151.6132.8
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax nrg:OperatingRevenues0.00.00.00.00.00.00.00.00.00.00.00.00.00.0

Selling General And Administrative Expense

us-gaap:SellingGeneralAndAdministrativeExpense

us-gaap:SellingGeneralAndAdministrativeExpense


Selling
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value308330263253208209212210211194208212211191210213223272299282265255334332291263290258268226233229213229211253207221189169167143157172139130
Percentage of SellingGeneralAndAdministrativeExpense100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax5.94.213.49.49.810.99.78.411.810.910.410.210.910.58.47.08.39.911.87.110.07.911.17.58.66.96.95.67.46.58.36.67.311.010.210.99.611.98.96.37.37.28.66.46.55.9

us-gaap:SellingGeneralAndAdministrativeExpense us-gaap:ConsolidatedEntities

srt:GuarantorSubsidiaries


Selling
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-30
Value154137140100132112122125125108104101106
Percentage of SellingGeneralAndAdministrativeExpense60.965.967.047.262.953.162.960.159.051.254.548.149.8
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax5.76.57.34.65.36.36.96.36.05.65.74.03.5
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax srt:GuarantorSubsidiaries0.00.00.00.00.00.00.00.00.00.00.00.00.0

srt:NonGuarantorSubsidiaries


Selling
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-30
Value7.07.05.027281216172116119.016
Percentage of SellingGeneralAndAdministrativeExpense2.83.42.412.713.35.78.28.29.97.65.84.37.5
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax0.30.30.31.21.10.70.90.91.00.80.60.40.5
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax srt:NonGuarantorSubsidiaries0.00.00.00.00.00.00.00.00.00.00.00.00.0

srt:ParentCompany


Selling
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-30
Value926464855087566613976619369
Percentage of SellingGeneralAndAdministrativeExpense36.430.830.640.123.841.228.931.765.636.031.944.332.4
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax3.43.03.33.92.04.93.13.36.73.93.33.72.3
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax srt:ParentCompany0.00.00.00.00.00.00.00.00.00.00.00.00.0

Assets

us-gaap:Assets

us-gaap:Assets


Assets
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312009-12-31
Value2161919241149021222512337128221253195279171953010628114502294723752233182547025205294203035531491314223268032882399884036540330406654006937629349613390234863344923537135128272202785628530267152476025336250432689623378
Percentage of Assets100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:Assets us-gaap:ConsolidatedEntities

srt:GuarantorSubsidiaries


Assetsus-gaap:
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302017-12-31
Value6013699778027486777069796756780679677754
Percentage of Assets49.256.760.859.781.676.170.973.469.633.3
Percentage of Assets49.256.760.859.781.676.170.973.469.633.3
Percentage of Assets srt:GuarantorSubsidiaries100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

srt:NonGuarantorSubsidiaries


Assetsus-gaap:
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302017-12-31
Value31732130216126932806246623312770286215993
Percentage of Assets26.017.316.921.529.526.924.526.125.068.6
Percentage of Assets26.017.316.921.529.526.924.526.125.068.6
Percentage of Assets srt:NonGuarantorSubsidiaries100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

srt:ParentCompany


Assetsus-gaap:
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302017-12-31
Value9439928496248641575251875429605768008270
Percentage of Assets77.275.375.169.060.456.657.057.059.435.5
Percentage of Assets77.275.375.169.060.456.657.057.059.435.5
Percentage of Assets srt:ParentCompany100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:VariableInterestEntityPrimaryBeneficiary


Assetsus-gaap:
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-31
Value6437296499162627101
Percentage of Assets3.03.84.47.50.20.20.8
Percentage of Assets3.03.84.47.50.20.20.8
Percentage of Assets us-gaap:VariableInterestEntityPrimaryBeneficiary100.0100.0100.0100.0100.0100.0100.0

us-gaap:Assets us-gaap:ConsolidationItems

srt:ConsolidationEliminations


Assetsus-gaap:
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302017-12-31
Value-6400.0-6074.0-6765.0-6289.0-6801.0-5461.0-4986.0-6005.0-6179.0-8467.0
Percentage of Assets-52.4-49.2-52.8-50.2-71.4-59.5-52.3-56.5-54.0-36.3
Percentage of Assets-52.4-49.2-52.8-50.2-71.4-59.5-52.3-56.5-54.0-36.3
Percentage of Assets srt:ConsolidationEliminations100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:CorporateNonSegment


Assetsus-gaap:
Period End2021-06-302020-12-31
Value1283811152
Percentage of Assets59.474.8
Percentage of Assets59.474.8
Percentage of Assets us-gaap:CorporateNonSegment100.0100.0

us-gaap:IntersegmentElimination


Assetsus-gaap:
Period End2021-06-302020-12-312019-12-312019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302016-12-31
Value-15250.0-7360.0-5040.0-4948.0-5401.0-6693.0-10816.0-9743.0-8852.0-10449.0-10433.0-10938.0
Percentage of Assets-70.5-49.4-40.2-51.9-50.8-58.5-47.1-41.0-38.0-41.0-41.4-36.0
Percentage of Assets-70.5-49.4-40.2-51.9-50.8-58.5-47.1-41.0-38.0-41.0-41.4-36.0
Percentage of Assets us-gaap:IntersegmentElimination100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

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

us-gaap:OperatingSegments, nrg:EastSegment


Assetsus-gaap:
Period End2021-06-302020-12-312019-12-31
Value1126018852160
Percentage of Assets52.112.617.2
Percentage of Assets52.112.617.2
Percentage of Assets us-gaap:OperatingSegments nrg:EastSegment100.0100.0100.0

us-gaap:OperatingSegments, nrg:TexasSegment


Assetsus-gaap:
Period End2021-06-302020-12-312019-12-31
Value875476415711
Percentage of Assets40.551.345.6
Percentage of Assets40.551.345.6
Percentage of Assets us-gaap:OperatingSegments nrg:TexasSegment100.0100.0100.0

us-gaap:OperatingSegments, nrg:WestAndOtherSegment


Assetsus-gaap:
Period End2020-12-312019-12-31
Value15841190
Percentage of Assets10.69.5
Percentage of Assets10.69.5
Percentage of Assets us-gaap:OperatingSegments nrg:WestAndOtherSegment100.0100.0

us-gaap:OperatingSegments, nrg:WestServicesAndOtherSegment


Assetsus-gaap:
Period End2021-06-30
Value4017
Percentage of Assets18.6
Percentage of Assets18.6
Percentage of Assets us-gaap:OperatingSegments nrg:WestServicesAndOtherSegment100.0

Liabilities

us-gaap:Liabilities

us-gaap:Liabilities


Liabilities
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312009-12-31
Value1907517724132221029110587112861085311079108001105011843123672080721414212722169521671253632586325979262782697227117278212801928641286792810226403243182318423733239402492624346190811970420648187971658016760171941857615434
Percentage of Liabilities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets88.292.188.784.285.888.086.6116.3117.8115.9111.4108.090.790.291.285.286.086.285.282.583.682.582.569.669.471.070.570.170.269.668.468.169.470.569.370.170.772.470.467.066.268.769.166.0

us-gaap:Liabilities us-gaap:ConsolidatedEntities

srt:GuarantorSubsidiaries


Liabilitiesus-gaap:
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302017-12-31
Value3502371840243931415838984203420450833900
Percentage of Liabilities34.035.135.736.237.536.138.035.541.118.3
Percentage of Assets28.630.131.431.443.642.544.139.644.416.7
Percentage of Assets srt:GuarantorSubsidiaries58.253.151.652.553.555.962.253.963.850.3

srt:NonGuarantorSubsidiaries


Liabilitiesus-gaap:
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302017-12-31
Value6757146597479549196421218125510396
Percentage of Liabilities6.66.75.86.98.68.55.810.310.148.9
Percentage of Assets5.55.85.16.010.010.06.711.511.044.6
Percentage of Assets srt:NonGuarantorSubsidiaries21.333.530.527.734.037.327.544.043.965.0

srt:ParentCompany


Liabilitiesus-gaap:
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302017-12-31
Value7505753480886969730568176949727373537799
Percentage of Liabilities72.971.271.764.265.963.162.961.459.536.7
Percentage of Assets61.461.163.155.676.774.372.968.464.233.4
Percentage of Assets srt:ParentCompany79.581.284.080.7127.0131.4128.0120.1108.194.3

us-gaap:VariableInterestEntityPrimaryBeneficiary


Liabilitiesus-gaap:
Period End2020-12-312020-09-302020-06-302020-03-312019-12-31
Value7832323236
Percentage of Liabilities0.60.30.30.30.3
Percentage of Assets0.50.30.30.20.3
Percentage of Assets us-gaap:VariableInterestEntityPrimaryBeneficiary12.03.5123.1118.535.6

us-gaap:Liabilities us-gaap:ConsolidationItems

srt:ConsolidationEliminations


Liabilitiesus-gaap:
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302017-12-31
Value-1391.0-1379.0-1485.0-794.0-1338.0-834.0-744.0-852.0-1324.0-591.0
Percentage of Liabilities-13.5-13.0-13.2-7.3-12.1-7.7-6.7-7.2-10.7-2.8
Percentage of Assets-11.4-11.2-11.6-6.3-14.0-9.1-7.8-8.0-11.6-2.5
Percentage of Assets srt:ConsolidationEliminations21.722.722.012.619.715.314.914.221.47.0

Liabilities And Stockholders Equity

us-gaap:LiabilitiesAndStockholdersEquity

us-gaap:LiabilitiesAndStockholdersEquity


Liabilities
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312009-12-31
Value2161919241149021222512337128221253195279171953010628114502294723752233182547025205294203035531491314223268032882399884036540330406654006937629349613390234863344923537135128272202785628530267152476025336250432689623378
Percentage of LiabilitiesAndStockholdersEquity100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:LiabilitiesAndStockholdersEquity us-gaap:ConsolidatedEntities

srt:GuarantorSubsidiaries


Liabilities
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302017-12-31
Value6013699778027486777069796756780679677754
Percentage of LiabilitiesAndStockholdersEquity49.256.760.859.781.676.170.973.469.633.3
Percentage of Assets49.256.760.859.781.676.170.973.469.633.3
Percentage of Assets srt:GuarantorSubsidiaries100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

srt:NonGuarantorSubsidiaries


Liabilities
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302017-12-31
Value31732130216126932806246623312770286215993
Percentage of LiabilitiesAndStockholdersEquity26.017.316.921.529.526.924.526.125.068.6
Percentage of Assets26.017.316.921.529.526.924.526.125.068.6
Percentage of Assets srt:NonGuarantorSubsidiaries100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

srt:ParentCompany


Liabilities
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302017-12-31
Value9439928496248641575251875429605768008270
Percentage of LiabilitiesAndStockholdersEquity77.275.375.169.060.456.657.057.059.435.5
Percentage of Assets77.275.375.169.060.456.657.057.059.435.5
Percentage of Assets srt:ParentCompany100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:LiabilitiesAndStockholdersEquity us-gaap:ConsolidationItems

srt:ConsolidationEliminations


Liabilities
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302017-12-31
Value-6400.0-6074.0-6765.0-6289.0-6801.0-5461.0-4986.0-6005.0-6179.0-8467.0
Percentage of LiabilitiesAndStockholdersEquity-52.4-49.2-52.8-50.2-71.4-59.5-52.3-56.5-54.0-36.3
Percentage of Assets-52.4-49.2-52.8-50.2-71.4-59.5-52.3-56.5-54.0-36.3
Percentage of Assets srt:ConsolidationEliminations100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Assets Current

us-gaap:AssetsCurrent

us-gaap:AssetsCurrent


Assets
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312009-12-31
Value86246552602830873076347930883187304534583600428547534557441547604469544063957014636473467391807380108122858278727757838375967249694380317956638372558458759763386039637871376208
Percentage of AssetsCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets39.934.140.525.324.927.124.633.533.236.333.937.420.719.218.918.717.718.521.122.320.322.522.520.219.820.121.119.620.624.022.420.820.122.722.623.426.029.628.425.623.825.526.526.6

us-gaap:AssetsCurrent us-gaap:ConsolidatedEntities

srt:GuarantorSubsidiaries


Assets
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302017-12-31
Value1817250533302810339328812697313831542921
Percentage of AssetsCurrent58.981.495.791.0106.594.678.087.273.666.2
Percentage of Assets14.920.326.022.435.631.428.329.527.512.5
Percentage of Assets srt:GuarantorSubsidiaries30.235.842.737.543.741.339.940.239.637.7

srt:NonGuarantorSubsidiaries


Assets
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302017-12-31
Value11672482874323983583964024541645
Percentage of AssetsCurrent37.88.18.214.012.511.811.511.210.637.3
Percentage of Assets9.52.02.23.44.23.94.23.84.07.1
Percentage of Assets srt:NonGuarantorSubsidiaries36.811.613.316.014.214.517.014.515.910.3

srt:ParentCompany


Assets
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302017-12-31
Value14841693133462772262110888951978535
Percentage of AssetsCurrent48.155.038.320.322.720.431.524.946.212.1
Percentage of Assets12.113.710.45.07.66.811.48.417.32.3
Percentage of Assets srt:ParentCompany15.718.213.97.312.612.020.014.829.16.5

us-gaap:VariableInterestEntityPrimaryBeneficiary


Assets
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-31
Value1.01.02.04.01.01.03.0
Percentage of AssetsCurrent0.00.00.00.10.00.00.1
Percentage of Assets0.00.00.00.00.00.00.0
Percentage of Assets us-gaap:VariableInterestEntityPrimaryBeneficiary0.20.10.30.43.83.73.0

us-gaap:AssetsCurrent us-gaap:ConsolidationItems

srt:ConsolidationEliminations


Assets
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302017-12-31
Value-1381.0-1370.0-1472.0-781.0-1326.0-815.0-723.0-835.0-1301.0-591.0
Percentage of AssetsCurrent-44.7-44.5-42.3-25.3-41.6-26.8-20.9-23.2-30.4-13.4
Percentage of Assets-11.3-11.1-11.5-6.2-13.9-8.9-7.6-7.9-11.4-2.5
Percentage of Assets srt:ConsolidationEliminations21.622.621.812.419.514.914.513.921.17.0

Cash And Cash Equivalents At Carrying Value

us-gaap:CashAndCashEquivalentsAtCarryingValue

us-gaap:CashAndCashEquivalentsAtCarryingValue


Cash
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312008-12-312007-12-31
Value36150139056974187593452432948595631359980764991122375215131973243513891659151822652146216421161953148131872254212913681707208716101149101411051127193927112951344721681813230414941132
Percentage of CashAndCashEquivalentsAtCarryingValue100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets1.72.626.25.73.45.92.82.63.29.05.311.94.33.24.24.83.05.16.57.74.45.14.65.75.35.45.24.93.99.16.66.14.04.85.95.94.13.64.14.67.710.811.00.00.00.09.90.00.0

us-gaap:CashAndCashEquivalentsAtCarryingValue us-gaap:ConsolidatedEntities

srt:NonGuarantorSubsidiaries


Cash
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302017-12-31
Value232019202627272822124
Percentage of CashAndCashEquivalentsAtCarryingValue3.34.82.55.810.79.23.15.01.612.5
Percentage of Assets0.20.20.10.20.30.30.30.30.20.5
Percentage of Assets srt:NonGuarantorSubsidiaries0.70.90.90.70.91.11.21.00.80.8

srt:ParentCompany


Cash
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302017-12-31
Value6743987403252172678324801207643
Percentage of CashAndCashEquivalentsAtCarryingValue96.795.297.594.289.390.896.985.388.864.9
Percentage of Assets5.53.25.82.62.32.98.74.510.52.8
Percentage of Assets srt:ParentCompany7.14.37.73.83.85.115.37.917.87.8

Accounts Receivable Net Current

us-gaap:AccountsReceivableNetCurrent

us-gaap:AccountsReceivableNetCurrent


Accounts
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312009-12-31
Value28223037904112610159151025137610498981019129713719031079127411629741166136212511018115714921413117913221554148211491214136612909829861075100071683410421008687734876
Percentage of AccountsReceivableNetCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets13.115.86.19.28.27.18.214.411.49.49.611.36.03.84.65.04.63.33.84.34.03.13.53.73.52.93.33.93.93.33.63.93.72.82.83.93.62.53.14.24.02.72.73.7

us-gaap:AccountsReceivableNetCurrent us-gaap:ConsolidatedEntities

srt:GuarantorSubsidiaries


Accounts
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302017-12-31
Value650987168412932049138312288941151911
Percentage of AccountsReceivableNetCurrent57.797.2184.0126.1148.9131.8136.787.788.784.4
Percentage of Assets5.38.013.110.321.515.112.98.410.13.9
Percentage of Assets srt:GuarantorSubsidiaries10.814.121.617.326.419.818.211.514.411.7

srt:NonGuarantorSubsidiaries


Accounts
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302017-12-31
Value1034111137239194133199829745
Percentage of AccountsReceivableNetCurrent91.810.915.023.314.112.722.28.07.54.2
Percentage of Assets8.50.91.11.92.01.52.10.80.80.2
Percentage of Assets srt:NonGuarantorSubsidiaries32.65.26.38.96.95.48.53.03.40.3

srt:ParentCompany


Accounts
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302017-12-31
Value805126753323342627715943494.0
Percentage of AccountsReceivableNetCurrent71.5124.858.322.731.026.417.74.23.80.4
Percentage of Assets6.610.34.21.94.53.01.70.40.40.0
Percentage of Assets srt:ParentCompany8.513.65.52.77.45.32.90.70.70.0

us-gaap:VariableInterestEntityPrimaryBeneficiary


Accounts
Period End2020-12-312019-12-31
Value6473.0
Percentage of AccountsReceivableNetCurrent71.60.3
Percentage of Assets4.30.0
Percentage of Assets us-gaap:VariableInterestEntityPrimaryBeneficiary99.73.0

us-gaap:AccountsReceivableNetCurrent us-gaap:ConsolidationItems

srt:ConsolidationEliminations


Accounts
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302017-12-31
Value-1363.0-1350.0-1439.0-740.0-1293.0-744.0-688.00.00.00.0
Percentage of AccountsReceivableNetCurrent-121.0-133.0-157.3-72.2-94.0-70.9-76.60.00.00.0
Percentage of Assets-11.1-10.9-11.2-5.9-13.6-8.1-7.20.00.00.0
Percentage of Assets srt:ConsolidationEliminations21.322.221.311.819.013.613.8-0.0-0.0-0.0

Receivables Net Current

us-gaap:ReceivablesNetCurrent us-gaap:ConsolidatedEntities

us-gaap:ReceivablesNetCurrent

us-gaap:VariableInterestEntityPrimaryBeneficiary


Receivables
Period End2021-06-302021-03-312020-12-312020-09-30
Value642728647887
Percentage of ReceivablesNetCurrent100.0100.0100.0100.0
Percentage of Assets3.03.84.37.3
Percentage of Assets us-gaap:VariableInterestEntityPrimaryBeneficiary99.899.999.796.8

Inventory Net

us-gaap:InventoryNet

us-gaap:InventoryNet


Inventory
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312009-12-31
Value36531632733038837238336437039141240848552853263071311401111101711241161125211491153110912471051996781898861874904931393416392308320386418453541
Percentage of InventoryNet100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets1.71.62.22.73.12.93.13.84.04.13.93.62.12.22.32.52.83.93.73.23.63.63.82.92.92.73.12.62.62.22.62.52.52.62.71.41.51.41.21.31.51.71.72.3

us-gaap:InventoryNet us-gaap:ConsolidatedEntities

srt:GuarantorSubsidiaries


Inventory
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302017-12-31
Value253306287272248254277278301338
Percentage of InventoryNet76.778.977.271.068.168.670.867.573.863.5
Percentage of Assets2.12.52.22.22.62.82.92.62.61.4
Percentage of Assets srt:GuarantorSubsidiaries4.24.43.73.63.23.64.13.63.84.4

srt:NonGuarantorSubsidiaries


Inventory
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302017-12-31
Value778285111116116114134107148
Percentage of InventoryNet23.321.122.829.031.931.429.232.526.227.8
Percentage of Assets0.60.70.70.91.21.31.21.30.90.6
Percentage of Assets srt:NonGuarantorSubsidiaries2.43.83.94.14.14.74.94.83.70.9

Other Assets Current

us-gaap:OtherAssetsCurrent us-gaap:ConsolidatedEntities

us-gaap:OtherAssetsCurrent

us-gaap:VariableInterestEntityPrimaryBeneficiary


Other
Period End2020-12-31
Value2000000.0
Percentage of OtherAssetsCurrent100.0
Percentage of Assets0.0
Percentage of Assets us-gaap:VariableInterestEntityPrimaryBeneficiary0.3

Prepaid Expense And Other Assets Current

us-gaap:PrepaidExpenseAndOtherAssetsCurrent

us-gaap:PrepaidExpenseAndOtherAssetsCurrent


Prepaid
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302010-12-31
Value473511257258284290245271277285302248328326261354400454423369406461442460516474447475537599498442415724535217606272273245298296
Percentage of PrepaidExpenseAndOtherAssetsCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets2.22.71.72.12.32.32.02.83.03.02.82.21.41.41.11.41.61.51.41.21.31.41.31.21.31.21.11.21.41.71.51.31.22.01.50.82.21.01.01.01.21.1

us-gaap:PrepaidExpenseAndOtherAssetsCurrent us-gaap:ConsolidatedEntities

srt:GuarantorSubsidiaries


Prepaid
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302017-12-31
Value238247222170178190192180160122
Percentage of PrepaidExpenseAndOtherAssetsCurrent92.287.076.669.465.768.667.459.664.546.7
Percentage of Assets1.92.01.71.41.92.12.01.71.40.5
Percentage of Assets srt:GuarantorSubsidiaries4.03.52.82.32.32.72.82.32.01.6

srt:NonGuarantorSubsidiaries


Prepaid
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302017-12-31
Value1610.08.08.0151111323530
Percentage of PrepaidExpenseAndOtherAssetsCurrent6.23.52.83.35.54.03.910.614.111.5
Percentage of Assets0.10.10.10.10.20.10.10.30.30.1
Percentage of Assets srt:NonGuarantorSubsidiaries0.50.50.40.30.50.40.51.21.20.2

srt:ParentCompany


Prepaid
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302017-12-31
Value4.0276067787682905327
Percentage of PrepaidExpenseAndOtherAssetsCurrent1.69.520.727.328.827.428.829.821.410.3
Percentage of Assets0.00.20.50.50.80.80.90.80.50.1
Percentage of Assets srt:ParentCompany0.00.30.60.81.41.51.51.50.80.3

Accumulated Depreciation Depletion And Amortization Property Plant And Equipment

us-gaap:AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment

us-gaap:AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment


Accumulated
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312009-12-31
Value143315661936190118681832175217591684161018112652453446794465643761806602-6314.06424610770936804896986118261789075847230688865736264595956805417519449764768457043714170398737963052
Percentage of AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets6.68.113.015.615.114.314.018.518.416.917.023.219.819.719.125.324.522.4-20.820.419.421.720.722.421.320.519.418.919.219.719.418.017.316.115.419.117.916.717.117.716.515.914.113.1

Property Plant And Equipment Net

us-gaap:PropertyPlantAndEquipmentNet

us-gaap:PropertyPlantAndEquipmentNet


Property
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312009-12-31
Value2573253325732593261526102650304835991277413911139081533215302179421791218203183821876318732219852230422276223672218121576196441985120600204542040420268158661531814376136211284312283115791251711564
Percentage of PropertyPlantAndEquipmentNet100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets21.020.520.120.727.428.527.828.731.455.758.659.660.260.761.059.057.858.557.457.055.055.355.255.055.457.356.258.659.159.357.757.758.355.050.451.051.948.546.246.549.5

us-gaap:PropertyPlantAndEquipmentNet us-gaap:ConsolidatedEntities

srt:GuarantorSubsidiaries


Property
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302017-12-31
Value1270133613721483149414941512193823722507
Percentage of PropertyPlantAndEquipmentNet49.452.753.357.257.157.257.163.665.918.0
Percentage of Assets10.410.810.711.815.716.315.918.220.710.8
Percentage of Assets srt:GuarantorSubsidiaries21.119.117.619.819.221.422.424.829.832.3

srt:NonGuarantorSubsidiaries


Property
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302017-12-31
Value11591046104695296596598795710773695
Percentage of PropertyPlantAndEquipmentNet45.041.340.736.736.937.037.231.429.926.6
Percentage of Assets9.58.58.27.610.110.510.49.09.415.8
Percentage of Assets srt:NonGuarantorSubsidiaries36.549.148.435.434.439.142.334.537.623.1

srt:ParentCompany


Property
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302017-12-31
Value144151155158156151151153150237
Percentage of PropertyPlantAndEquipmentNet5.66.06.06.16.05.85.75.04.21.7
Percentage of Assets1.21.21.21.31.61.61.61.41.31.0
Percentage of Assets srt:ParentCompany1.51.61.61.82.72.92.82.52.22.9

Investments In Affiliates Subsidiaries Associates And Joint Ventures

us-gaap:InvestmentsInAffiliatesSubsidiariesAssociatesAndJointVentures us-gaap:ConsolidatedEntities

us-gaap:InvestmentsInAffiliatesSubsidiariesAssociatesAndJointVentures

srt:GuarantorSubsidiaries


Investments
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302017-12-31
Value28170158710786436477446477266
Percentage of InvestmentsInAffiliatesSubsidiariesAssociatesAndJointVentures100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets0.21.41.25.78.34.85.04.24.21.1
Percentage of Assets srt:GuarantorSubsidiaries0.52.42.09.510.16.27.15.76.03.4

srt:ParentCompany


Investments
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302017-12-31
Value4981452551224785467741913765470743797581
Percentage of InvestmentsInAffiliatesSubsidiariesAssociatesAndJointVentures17789.32661.83241.8673.9595.0961.2789.31055.4918.02850.0
Percentage of Assets40.736.739.938.249.145.739.544.338.232.5
Percentage of Assets srt:ParentCompany52.848.753.255.481.380.869.377.764.491.7

us-gaap:InvestmentsInAffiliatesSubsidiariesAssociatesAndJointVentures us-gaap:ConsolidationItems

srt:ConsolidationEliminations


Investments
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302017-12-31
Value-5009.0-4695.0-5280.0-5495.0-5463.0-4627.0-4242.0-5153.0-4856.0-7847.0
Percentage of InvestmentsInAffiliatesSubsidiariesAssociatesAndJointVentures-17889.3-2761.8-3341.8-773.9-695.0-1061.2-889.3-1155.4-1018.0-2950.0
Percentage of Assets-41.0-38.1-41.2-43.9-57.3-50.5-44.5-48.5-42.4-33.7
Percentage of Assets srt:ConsolidationEliminations78.377.378.087.480.384.785.185.878.692.7

Goodwill

us-gaap:Goodwill

us-gaap:Goodwill


Goodwill
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312009-12-31
Value17931572579579579579579591573573573539539539539662662662662999999999999250325552520257424522116203819851953195419541956188618861886188618591863186318681718
Percentage of Goodwill100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets8.38.23.94.74.74.54.66.26.26.05.44.72.32.32.32.62.62.32.23.23.23.13.06.36.36.26.36.15.65.85.95.65.75.55.66.96.86.67.17.57.47.46.97.3

us-gaap:Goodwill us-gaap:BusinessAcquisition

nrg:DirectEnergy


Goodwillus-gaap:
Period End2021-01-05
Value990
Percentage of Goodwill0.0
Percentage of Assets0.0
Percentage of Assets nrg:DirectEnergy0.0

nrg:RetailBusinessAcquisitions


Goodwillus-gaap:
Period End2020-12-31
Value414
Percentage of Goodwill71.5
Percentage of Assets2.8
Percentage of Assets nrg:RetailBusinessAcquisitions0.0

us-gaap:Goodwill us-gaap:ConsolidatedEntities

srt:GuarantorSubsidiaries


Goodwillus-gaap:
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302017-12-31
Value400400400359359359360359359360
Percentage of Goodwill69.169.169.162.060.762.762.862.766.666.8
Percentage of Assets3.33.23.12.93.83.93.83.43.11.5
Percentage of Assets srt:GuarantorSubsidiaries6.75.75.14.84.65.15.34.64.54.6

srt:NonGuarantorSubsidiaries


Goodwillus-gaap:
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302017-12-31
Value179179179220232214213214180179
Percentage of Goodwill30.930.930.938.039.337.337.237.333.433.2
Percentage of Assets1.51.51.41.82.42.32.22.01.60.8
Percentage of Assets srt:NonGuarantorSubsidiaries5.68.48.38.28.38.79.17.76.31.1

Indefinite Lived Intangible Assets Excluding Goodwill

us-gaap:IndefiniteLivedIntangibleAssetsExcludingGoodwill us-gaap:IndefiniteLivedIntangibleAssetsByMajorClass

us-gaap:IndefiniteLivedIntangibleAssetsExcludingGoodwill

nrg:RenewableEnergyCertificates


Indefinite
Period End2020-12-312019-12-31
Value2818
Percentage of IndefiniteLivedIntangibleAssetsExcludingGoodwill100.0100.0
Percentage of Assets0.20.1
Percentage of Assets nrg:RenewableEnergyCertificates0.00.0

Finite Lived Intangible Assets Net

us-gaap:FiniteLivedIntangibleAssetsNet

us-gaap:FiniteLivedIntangibleAssetsNet


Finite
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312009-12-31
Value2921305466872173376978982856158059160218601726174618381893195720362106218022562310237124282491256728801434130011401141112011761200118812561340141915611589168617761777
Percentage of FiniteLivedIntangibleAssetsNet100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets13.515.94.55.95.96.06.38.76.16.15.65.38.17.37.57.27.56.76.76.76.96.97.05.96.06.26.37.23.83.73.43.33.23.33.44.44.54.75.36.36.36.76.67.6

us-gaap:FiniteLivedIntangibleAssetsNet us-gaap:ConsolidatedEntities

srt:GuarantorSubsidiaries


Finite
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302017-12-31
Value684695729375390402414422403455
Percentage of FiniteLivedIntangibleAssetsNet94.994.894.847.547.171.771.471.466.926.1
Percentage of Assets5.65.65.73.04.14.44.34.03.52.0
Percentage of Assets srt:GuarantorSubsidiaries11.49.99.35.05.05.86.15.45.15.9

srt:NonGuarantorSubsidiaries


Finite
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302017-12-31
Value37384041443815916616919955
Percentage of FiniteLivedIntangibleAssetsNet5.15.25.252.552.928.328.628.633.13.2
Percentage of Assets0.30.30.33.34.61.71.71.61.70.2
Percentage of Assets srt:NonGuarantorSubsidiaries1.21.81.915.415.66.47.16.17.00.3

us-gaap:FiniteLivedIntangibleAssetsNet us-gaap:FiniteLivedIntangibleAssetsByMajorClass

nrg:EmissionAllowances


Finite
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-312010-12-312009-12-31
Value109123144176324418461438464448666720
Percentage of FiniteLivedIntangibleAssetsNet16.315.624.410.115.918.118.038.438.731.637.540.5
Percentage of Assets0.71.01.40.81.11.31.11.31.31.72.53.1
Percentage of Assets nrg:EmissionAllowances0.00.00.00.00.00.00.00.00.00.00.00.0

nrg:FuelContracts


Finite
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-312010-12-312009-12-31
Value3.04.04.04.05.07.09.01113151723
Percentage of FiniteLivedIntangibleAssetsNet0.40.50.70.20.20.30.41.01.11.11.01.3
Percentage of Assets0.00.00.00.00.00.00.00.00.00.10.10.1
Percentage of Assets nrg:FuelContracts0.00.00.00.00.00.00.00.00.00.00.00.0

nrg:MarketingPartnerships


Finite
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-31
Value1862107034394761768488
Percentage of FiniteLivedIntangibleAssetsNet27.826.611.81.91.92.02.46.77.06.2
Percentage of Assets1.21.70.70.10.10.10.20.20.20.3
Percentage of Assets nrg:MarketingPartnerships0.00.00.00.00.00.00.00.00.00.0

nrg:OtherFiniteLivedIntangibleAssets


Finite
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-312010-12-312009-12-31
Value6671591491982182558555382214
Percentage of FiniteLivedIntangibleAssetsNet9.99.010.08.59.79.49.97.54.62.71.20.8
Percentage of Assets0.40.60.60.60.70.70.60.30.20.10.10.1
Percentage of Assets nrg:OtherFiniteLivedIntangibleAssets0.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:CustomerRelationships


Finite
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-312010-12-312009-12-31
Value178228164136153210274256225317363282
Percentage of FiniteLivedIntangibleAssetsNet26.628.927.77.87.59.110.722.518.822.320.415.9
Percentage of Assets1.21.81.50.60.50.60.70.80.61.21.31.2
Percentage of Assets us-gaap:CustomerRelationships0.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:TradeNames


Finite
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-312010-12-312009-12-31
Value126153150160183205239225246276288170
Percentage of FiniteLivedIntangibleAssetsNet18.919.425.49.29.08.99.319.720.519.516.29.6
Percentage of Assets0.81.21.40.70.60.60.60.70.71.01.10.7
Percentage of Assets us-gaap:TradeNames0.00.00.00.00.00.00.00.00.00.00.00.0

Deferred Tax Assets Liabilities Net

us-gaap:DeferredTaxAssetsLiabilitiesNet

us-gaap:DeferredTaxAssetsLiabilitiesNet


Deferred
Period End2020-12-312019-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-312010-12-312009-12-31
Value30473269113205148155914381262-1516.0-2097.0-1980.0
Percentage of DeferredTaxAssetsLiabilitiesNet100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets20.426.10.50.70.53.84.23.6-5.7-7.8-8.5

Operating Lease Right Of Use Asset

us-gaap:OperatingLeaseRightOfUseAsset

us-gaap:OperatingLeaseRightOfUseAsset


Operating
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-31
Value3073123013454294464644824995170.0
Percentage of OperatingLeaseRightOfUseAsset100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0
Percentage of Assets1.41.62.02.83.53.53.75.15.45.40.0

us-gaap:OperatingLeaseRightOfUseAsset us-gaap:ConsolidatedEntities

srt:GuarantorSubsidiaries


Operating
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-31
Value68737981859195
Percentage of OperatingLeaseRightOfUseAsset19.717.017.717.517.618.218.4
Percentage of Assets0.60.60.60.60.91.01.0
Percentage of Assets srt:GuarantorSubsidiaries1.11.01.01.11.11.31.4

srt:NonGuarantorSubsidiaries


Operating
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-31
Value167244251261271279289
Percentage of OperatingLeaseRightOfUseAsset48.456.956.356.256.255.955.9
Percentage of Assets1.42.02.02.12.83.03.0
Percentage of Assets srt:NonGuarantorSubsidiaries5.311.511.69.79.711.312.4

srt:ParentCompany


Operating
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-31
Value110112116122126129133
Percentage of OperatingLeaseRightOfUseAsset31.926.126.026.326.125.925.7
Percentage of Assets0.90.90.91.01.31.41.4
Percentage of Assets srt:ParentCompany1.21.21.21.42.22.52.4

Other Assets Noncurrent

us-gaap:OtherAssetsNoncurrent

us-gaap:OtherAssetsNoncurrent


Other
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312009-12-31
Value614625216314212225240252271255289281655681629644659117211791198123911511214142614051404124412811307740689578545597392392352336324274198208148
Percentage of OtherAssetsNoncurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets2.83.21.42.61.71.81.92.63.02.72.72.52.92.92.72.52.64.03.93.83.93.53.73.63.53.53.13.23.52.22.01.71.51.71.41.41.21.31.31.10.80.80.6

us-gaap:OtherAssetsNoncurrent us-gaap:ConsolidatedEntities

srt:GuarantorSubsidiaries


Other
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302017-12-31
Value1681501631451511481431339250
Percentage of OtherAssetsNoncurrent53.570.872.460.459.954.656.146.032.77.9
Percentage of Assets1.41.21.31.21.61.61.51.30.80.2
Percentage of Assets srt:GuarantorSubsidiaries2.82.12.11.91.92.12.11.71.20.6

srt:NonGuarantorSubsidiaries


Other
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302017-12-31
Value1102727303030307170124
Percentage of OtherAssetsNoncurrent35.012.712.012.511.911.111.824.624.919.7
Percentage of Assets0.90.20.20.20.30.30.30.70.60.5
Percentage of Assets srt:NonGuarantorSubsidiaries3.51.31.21.11.11.21.32.62.40.8

srt:ParentCompany


Other
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302017-12-31
Value3635356571969497119120
Percentage of OtherAssetsNoncurrent11.516.515.627.128.235.436.933.642.319.1
Percentage of Assets0.30.30.30.50.71.01.00.91.00.5
Percentage of Assets srt:ParentCompany0.40.40.40.81.21.91.71.61.81.5

us-gaap:VariableInterestEntityPrimaryBeneficiary


Other
Period End2020-09-302020-06-302020-03-312019-12-31
Value25252627
Percentage of OtherAssetsNoncurrent8.011.811.611.2
Percentage of Assets0.20.20.20.2
Percentage of Assets us-gaap:VariableInterestEntityPrimaryBeneficiary2.796.296.326.7

Accounts Payable Current

us-gaap:AccountsPayableCurrent

us-gaap:AccountsPayableCurrent


Accounts
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312009-12-31
Value21662216649753736708722866723697862824975787881915757872895945898845869117310801045106010981103108210381140119610541170124613501080808974842568783693
Percentage of AccountsPayableCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets10.011.54.46.26.05.55.89.17.97.38.17.24.23.33.83.63.03.02.93.02.92.62.62.92.72.62.62.72.93.13.13.33.53.03.34.64.83.83.03.93.32.32.93.0

us-gaap:AccountsPayableCurrent us-gaap:ConsolidatedEntities

srt:GuarantorSubsidiaries


Accounts
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302017-12-31
Value933809101691813159371515693705609
Percentage of AccountsPayableCurrent123.9109.9143.5127.1151.8129.6217.480.485.669.1
Percentage of Assets7.66.67.97.313.810.215.96.56.22.6
Percentage of Assets srt:GuarantorSubsidiaries15.511.613.012.316.913.422.48.98.87.9

srt:NonGuarantorSubsidiaries


Accounts
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302017-12-31
Value144187125141146107-218.0645547
Percentage of AccountsPayableCurrent19.125.417.719.516.914.8-31.37.46.75.3
Percentage of Assets1.21.51.01.11.51.2-2.30.60.50.2
Percentage of Assets srt:NonGuarantorSubsidiaries4.58.85.85.25.24.3-9.42.31.90.3

srt:ParentCompany


Accounts
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302017-12-31
Value103910901006403698423881056455
Percentage of AccountsPayableCurrent138.0148.1142.155.880.658.512.612.27.86.2
Percentage of Assets8.58.87.83.27.34.60.91.00.60.2
Percentage of Assets srt:ParentCompany11.011.710.54.712.18.21.61.70.90.7

us-gaap:AccountsPayableCurrent us-gaap:ConsolidationItems

srt:ConsolidationEliminations


Accounts
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302017-12-31
Value-1363.0-1350.0-1439.0-740.0-1293.0-744.0-688.00.00.00.0
Percentage of AccountsPayableCurrent-181.0-183.4-203.2-102.5-149.3-102.9-98.70.00.00.0
Percentage of Assets-11.1-10.9-11.2-5.9-13.6-8.1-7.20.00.00.0
Percentage of Assets srt:ConsolidationEliminations21.322.221.311.819.013.613.8-0.0-0.0-0.0

Accrued Income Taxes Current

us-gaap:AccruedIncomeTaxesCurrent

us-gaap:AccruedIncomeTaxesCurrent


Accrued
Period End2020-12-312014-12-312013-12-31
Value121612
Percentage of AccruedIncomeTaxesCurrent100.0100.0100.0
Percentage of Assets0.10.00.0

Liabilities Current

us-gaap:LiabilitiesCurrent

us-gaap:LiabilitiesCurrent


Liabilities
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312009-12-31
Value69315795191519862157285223592564229419452398272336633708331737053520419743824301451443384375433644694509485945434746422542044382441151624677477756986885567139953105299842203762
Percentage of LiabilitiesCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets32.130.112.916.217.522.218.826.925.020.422.623.816.015.614.214.514.014.314.413.714.413.313.310.811.111.211.911.312.612.112.412.612.814.613.317.520.524.121.216.112.312.015.716.1

us-gaap:LiabilitiesCurrent us-gaap:ConsolidatedEntities

srt:GuarantorSubsidiaries


Liabilities
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302017-12-31
Value1749190221992047232020652298242931922248
Percentage of LiabilitiesCurrent88.188.277.186.890.590.0118.1101.3117.267.8
Percentage of Assets14.315.417.216.324.422.524.122.927.99.6
Percentage of Assets srt:GuarantorSubsidiaries29.127.228.227.329.929.634.031.140.129.0

srt:NonGuarantorSubsidiaries


Liabilities
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302017-12-31
Value256262204247333299-4.00.076931
Percentage of LiabilitiesCurrent12.912.17.210.513.013.0-0.20.02.828.1
Percentage of Assets2.12.11.62.03.53.3-0.00.00.74.0
Percentage of Assets srt:NonGuarantorSubsidiaries8.112.39.49.211.912.1-0.20.02.75.8

srt:ParentCompany


Liabilities
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302017-12-31
Value1362136319218461237745374804757824
Percentage of LiabilitiesCurrent68.663.267.435.948.232.519.233.527.824.8
Percentage of Assets11.111.015.06.813.08.13.97.66.63.5
Percentage of Assets srt:ParentCompany14.414.720.09.821.514.46.913.311.110.0

us-gaap:VariableInterestEntityPrimaryBeneficiary


Liabilities
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-31
Value7776785.04.04.04.0
Percentage of LiabilitiesCurrent1.11.34.10.30.20.10.2
Percentage of Assets0.40.40.50.00.00.00.0
Percentage of Assets us-gaap:VariableInterestEntityPrimaryBeneficiary12.010.412.00.515.414.84.0

us-gaap:LiabilitiesCurrent us-gaap:ConsolidationItems

srt:ConsolidationEliminations


Liabilities
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302017-12-31
Value-1381.0-1370.0-1472.0-781.0-1326.0-815.0-723.0-835.0-1302.0-591.0
Percentage of LiabilitiesCurrent-69.5-63.5-51.6-33.1-51.7-35.5-37.2-34.8-47.8-17.8
Percentage of Assets-11.3-11.1-11.5-6.2-13.9-8.9-7.6-7.9-11.4-2.5
Percentage of Assets srt:ConsolidationEliminations21.622.621.812.419.514.914.513.921.17.0

Long Term Debt Current

us-gaap:LongTermDebtCurrent

us-gaap:LongTermDebtCurrent


Long
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-31
Value798311.03.07.064088
Percentage of LongTermDebtCurrent100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets0.44.30.00.00.15.00.7

us-gaap:LongTermDebtCurrent us-gaap:ConsolidatedEntities

srt:GuarantorSubsidiaries


Long
Period End2020-09-302020-06-302020-03-312019-12-31
Value3.03.01.00.0
Percentage of LongTermDebtCurrent100.042.90.20.0
Percentage of Assets0.00.00.00.0
Percentage of Assets srt:GuarantorSubsidiaries0.00.00.00.0

Operating Lease Liability Current

us-gaap:OperatingLeaseLiabilityCurrent

us-gaap:OperatingLeaseLiabilityCurrent


Operating
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-31
Value797969696971737374740.0
Percentage of OperatingLeaseLiabilityCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0
Percentage of Assets0.40.40.50.60.60.60.60.80.80.80.0

us-gaap:OperatingLeaseLiabilityCurrent us-gaap:ConsolidatedEntities

srt:GuarantorSubsidiaries


Operating
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-31
Value18192020212223
Percentage of OperatingLeaseLiabilityCurrent26.127.528.227.428.829.731.1
Percentage of Assets0.10.20.20.20.20.20.2
Percentage of Assets srt:GuarantorSubsidiaries0.30.30.30.30.30.30.3

srt:NonGuarantorSubsidiaries


Operating
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-31
Value33313132313130
Percentage of OperatingLeaseLiabilityCurrent47.844.943.743.842.541.940.5
Percentage of Assets0.30.30.20.30.30.30.3
Percentage of Assets srt:NonGuarantorSubsidiaries1.01.51.41.21.11.31.3

srt:ParentCompany


Operating
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-31
Value18192021212121
Percentage of OperatingLeaseLiabilityCurrent26.127.528.228.828.828.428.4
Percentage of Assets0.10.20.20.20.20.20.2
Percentage of Assets srt:ParentCompany0.20.20.20.20.40.40.4

Other Accrued Liabilities Current

us-gaap:OtherAccruedLiabilitiesCurrent

us-gaap:OtherAccruedLiabilitiesCurrent


Other
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312012-12-312011-12-312010-12-312009-12-31
Value12251008678651581550663625601550680659719662734830810887543115098298156812221082104755312001065950480567281307298
Percentage of OtherAccruedLiabilitiesCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets5.75.24.55.34.74.35.36.66.65.86.45.83.12.83.13.33.23.01.83.73.13.01.73.12.72.61.43.02.82.71.41.61.11.11.3

us-gaap:OtherAccruedLiabilitiesCurrent us-gaap:ConsolidatedEntities

srt:GuarantorSubsidiaries


Other
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302017-12-31
Value275296259280271258244291282304
Percentage of OtherAccruedLiabilitiesCurrent42.250.947.142.243.442.944.442.842.841.4
Percentage of Assets2.22.42.02.22.82.82.62.72.51.3
Percentage of Assets srt:GuarantorSubsidiaries4.64.23.33.73.53.73.63.73.53.9

srt:NonGuarantorSubsidiaries


Other
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302017-12-31
Value71313144514257364064
Percentage of OtherAccruedLiabilitiesCurrent10.95.35.66.68.27.010.45.36.18.7
Percentage of Assets0.60.30.20.40.50.50.60.30.30.3
Percentage of Assets srt:NonGuarantorSubsidiaries2.21.51.41.61.81.72.41.31.40.4

srt:ParentCompany


Other
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302017-12-31
Value305254260339303301249353337401
Percentage of OtherAccruedLiabilitiesCurrent46.943.747.351.148.550.145.351.951.154.6
Percentage of Assets2.52.12.02.73.23.32.63.32.91.7
Percentage of Assets srt:ParentCompany3.22.72.73.95.35.84.65.85.04.8

Liabilities Noncurrent

us-gaap:LiabilitiesNoncurrent

us-gaap:LiabilitiesNoncurrent


Liabilities
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312009-12-31
Value1214411929113078305843084348494851585069105944596441714417706179551799018151211662148121678217642263422742234852355024132238202355921657200931898019351195291976419669143041400613763131261258513655141961435611672
Percentage of LiabilitiesNoncurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets56.262.075.967.968.365.867.889.492.795.588.984.274.774.577.070.672.071.970.868.869.369.369.258.758.359.858.658.857.657.556.055.556.655.956.052.550.348.249.150.853.956.753.449.9

us-gaap:LiabilitiesNoncurrent us-gaap:ConsolidatedEntities

srt:GuarantorSubsidiaries


Liabilities
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302017-12-31
Value1753181618251884183818331905177518911652
Percentage of LiabilitiesNoncurrent21.121.521.622.221.621.520.918.819.69.2
Percentage of Assets14.314.714.215.019.320.020.016.716.57.1
Percentage of Assets srt:GuarantorSubsidiaries29.226.023.425.223.726.328.222.723.721.3

srt:NonGuarantorSubsidiaries


Liabilities
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302017-12-31
Value419452455500621620646121811799465
Percentage of LiabilitiesNoncurrent5.05.45.45.97.37.37.112.912.252.7
Percentage of Assets3.43.73.54.06.56.86.811.510.340.6
Percentage of Assets srt:NonGuarantorSubsidiaries13.221.221.118.622.125.127.744.041.259.2

srt:ParentCompany


Liabilities
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302017-12-31
Value6143617161676123606860726575646965966975
Percentage of LiabilitiesNoncurrent74.073.273.172.171.371.472.268.568.438.8
Percentage of Assets50.250.048.148.963.766.269.060.957.629.9
Percentage of Assets srt:ParentCompany65.166.564.170.9105.5117.1121.1106.897.084.3

us-gaap:LiabilitiesNoncurrent us-gaap:ConsolidationItems

srt:ConsolidationEliminations


Liabilities
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302017-12-31
Value-10.0-9.0-13.0-13.0-12.0-19.0-21.0-17.0-22.00.0
Percentage of LiabilitiesNoncurrent-0.1-0.1-0.2-0.2-0.1-0.2-0.2-0.2-0.20.0
Percentage of Assets-0.1-0.1-0.1-0.1-0.1-0.2-0.2-0.2-0.20.0
Percentage of Assets srt:ConsolidationEliminations0.20.10.20.20.20.30.40.30.4-0.0

Long Term Debt

us-gaap:LongTermDebt

us-gaap:LongTermDebt


Long
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-06-192018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302010-12-312009-12-31
Value8855592959576592604262576042665666917436160921201658416633171321712519465194061941119253192881962020041202922050920366207641898817477168041669916610164571586611342105561011897299185888691048295
Percentage of LongTermDebt100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets59.448.548.351.448.265.765.969.863.064.970.10.069.871.367.367.966.263.961.661.359.059.750.150.350.950.151.850.550.049.647.948.246.545.241.737.935.536.437.135.133.835.5

Long Term Debt Noncurrent

us-gaap:LongTermDebtNoncurrent

us-gaap:LongTermDebtNoncurrent


Long
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-31
Value8712870586915792581058075803
Percentage of LongTermDebtNoncurrent100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets40.345.258.347.447.145.346.3

us-gaap:LongTermDebtNoncurrent us-gaap:ConsolidatedEntities

srt:GuarantorSubsidiaries


Long
Period End2020-09-302020-06-302020-03-312019-12-31
Value245245248302
Percentage of LongTermDebtNoncurrent4.24.24.35.2
Percentage of Assets2.02.01.92.4
Percentage of Assets srt:GuarantorSubsidiaries4.13.53.24.0

srt:ParentCompany


Long
Period End2020-09-302020-06-302020-03-312019-12-31
Value5547554155355473
Percentage of LongTermDebtNoncurrent95.895.495.394.3
Percentage of Assets45.444.943.243.7
Percentage of Assets srt:ParentCompany58.859.757.563.3

Debt And Capital Lease Obligations

us-gaap:DebtAndCapitalLeaseObligations

us-gaap:DebtAndCapitalLeaseObligations


Debt
Period End2021-06-302021-03-312020-12-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302010-12-312009-12-31
Value894496968859604262576043665766927438160951658816638171381713119477194141942219268193061963620055202972051520374207731899817488168171671316626164701588011342105561022198329289900092118418
Percentage of DebtAndCapitalLeaseObligations100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets41.450.459.448.265.765.969.963.065.070.169.871.467.368.066.264.061.761.359.159.750.250.350.950.151.850.550.049.647.948.246.645.241.737.935.836.837.535.534.236.0

Long Term Debt And Capital Lease Obligations

us-gaap:LongTermDebtAndCapitalLeaseObligations

us-gaap:LongTermDebtAndCapitalLeaseObligations


Long
Period End2021-06-302021-03-312020-12-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312009-12-31
Value8712870586915803579857946366644966581482115406157161565815842176721800618018178931867718983195981966120050199001991918165168031576715802158891591415733109681048510150974592088910880287487847
Percentage of LongTermDebtAndCapitalLeaseObligations100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets40.345.258.346.360.963.266.860.758.164.664.967.461.562.960.159.357.256.957.257.749.048.749.748.949.748.348.146.545.346.145.044.840.337.635.636.537.235.235.132.533.6

Deferred Income Tax Liabilities Net

us-gaap:DeferredIncomeTaxLiabilitiesNet

us-gaap:DeferredIncomeTaxLiabilitiesNet


Deferred
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312017-12-312017-09-302016-12-31
Value6430191717151770716265212120
Percentage of DeferredIncomeTaxLiabilitiesNet100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets0.30.20.10.10.10.10.10.70.80.70.60.10.10.1

us-gaap:DeferredIncomeTaxLiabilitiesNet us-gaap:ConsolidatedEntities

srt:NonGuarantorSubsidiaries


Deferred
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312017-12-31
Value171715176768606164
Percentage of DeferredIncomeTaxLiabilitiesNet100.0100.0100.0100.095.795.896.893.8304.8
Percentage of Assets0.10.10.10.10.70.70.60.60.3
Percentage of Assets srt:NonGuarantorSubsidiaries0.50.80.70.62.42.82.62.20.4

Pension And Other Postretirement Defined Benefit Plans Liabilities Noncurrent

us-gaap:PensionAndOtherPostretirementDefinedBenefitPlansLiabilitiesNoncurrent us-gaap:RetirementPlanType

us-gaap:PensionAndOtherPostretirementDefinedBenefitPlansLiabilitiesNoncurrent

us-gaap:OtherPostretirementBenefitPlansDefinedBenefit


Pension
Period End2020-12-312019-12-312018-12-312017-12-312016-12-31
Value858676121120
Percentage of PensionAndOtherPostretirementDefinedBenefitPlansLiabilitiesNoncurrent100.0100.0100.0100.0100.0
Percentage of Assets0.60.70.70.50.4
Percentage of Assets us-gaap:OtherPostretirementBenefitPlansDefinedBenefit0.00.00.00.00.0

us-gaap:PensionPlansDefinedBenefit


Pension
Period End2020-12-312019-12-312018-12-312017-12-312016-12-31
Value217247241225288
Percentage of PensionAndOtherPostretirementDefinedBenefitPlansLiabilitiesNoncurrent255.3287.2317.1186.0240.0
Percentage of Assets1.52.02.31.00.9
Percentage of Assets us-gaap:PensionPlansDefinedBenefit0.00.00.00.00.0

Other Liabilities Noncurrent

us-gaap:OtherLiabilitiesNoncurrent

us-gaap:OtherLiabilitiesNoncurrent


Other
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312009-12-31
Value12151192106610621061107610841036101610897181177113011366641116113514879301480155415479001478152715498471385125412306951377141714747358968788103566225981133820519
Percentage of OtherLiabilitiesNoncurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets5.66.27.28.78.68.48.710.911.111.46.810.34.94.82.84.44.55.13.14.74.94.72.73.73.83.82.13.53.33.52.13.94.14.22.13.33.22.81.32.52.44.53.02.2

us-gaap:OtherLiabilitiesNoncurrent us-gaap:ConsolidatedEntities

srt:GuarantorSubsidiaries


Other
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302017-12-31
Value307421438399412399408288410410
Percentage of OtherLiabilitiesNoncurrent28.939.740.736.839.839.337.540.134.861.7
Percentage of Assets2.53.43.43.24.34.44.32.73.61.8
Percentage of Assets srt:GuarantorSubsidiaries5.16.05.65.35.35.76.03.75.15.3

srt:NonGuarantorSubsidiaries


Other
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302017-12-31
Value266120120153160148149198197201
Percentage of OtherLiabilitiesNoncurrent25.011.311.214.115.414.613.727.616.730.3
Percentage of Assets2.21.00.91.21.71.61.61.91.70.9
Percentage of Assets srt:NonGuarantorSubsidiaries8.45.65.65.75.76.06.47.16.91.3

srt:ParentCompany


Other
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302017-12-31
Value489520518532464469532232570391
Percentage of OtherLiabilitiesNoncurrent46.049.048.149.144.846.248.932.348.458.9
Percentage of Assets4.04.24.04.24.95.15.62.25.01.7
Percentage of Assets srt:ParentCompany5.25.65.46.28.19.09.83.88.44.7

us-gaap:VariableInterestEntityPrimaryBeneficiary


Other
Period End2020-09-302020-06-302020-03-312019-12-31
Value274.04.08.0
Percentage of OtherLiabilitiesNoncurrent2.50.40.40.7
Percentage of Assets0.20.00.00.1
Percentage of Assets us-gaap:VariableInterestEntityPrimaryBeneficiary2.915.414.87.9

Operating Lease Liability Noncurrent

us-gaap:OperatingLeaseLiabilityNoncurrent

us-gaap:OperatingLeaseLiabilityNoncurrent


Operating
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-31
Value2722802782974584734835005135290.0
Percentage of OperatingLeaseLiabilityNoncurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0
Percentage of Assets1.31.51.92.43.73.73.95.25.65.60.0

us-gaap:OperatingLeaseLiabilityNoncurrent us-gaap:ConsolidatedEntities

srt:GuarantorSubsidiaries


Operating
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-31
Value56586464707377
Percentage of OperatingLeaseLiabilityNoncurrent18.912.713.513.314.014.214.6
Percentage of Assets0.50.50.50.50.70.80.8
Percentage of Assets srt:GuarantorSubsidiaries0.90.80.80.90.91.01.1

srt:NonGuarantorSubsidiaries


Operating
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-31
Value134290295301307313320
Percentage of OperatingLeaseLiabilityNoncurrent45.163.362.462.361.461.060.5
Percentage of Assets1.12.42.32.43.23.43.4
Percentage of Assets srt:NonGuarantorSubsidiaries4.213.613.711.210.912.713.7

srt:ParentCompany


Operating
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-31
Value107110114118123127132
Percentage of OperatingLeaseLiabilityNoncurrent36.024.024.124.424.624.825.0
Percentage of Assets0.90.90.90.91.31.41.4
Percentage of Assets srt:ParentCompany1.11.21.21.42.12.42.4

Lessee Operating Lease Liability Payments Due Year Two

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearTwo

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearTwo


Lessee
Period End2020-12-31
Value82
Percentage of LesseeOperatingLeaseLiabilityPaymentsDueYearTwo100.0
Percentage of Assets0.6

Lessee Operating Lease Liability Payments Due Year Three

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearThree

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearThree


Lessee
Period End2020-12-31
Value81
Percentage of LesseeOperatingLeaseLiabilityPaymentsDueYearThree100.0
Percentage of Assets0.5

Lessee Operating Lease Liability Payments Due Year Four

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearFour

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearFour


Lessee
Period End2020-12-31
Value71
Percentage of LesseeOperatingLeaseLiabilityPaymentsDueYearFour100.0
Percentage of Assets0.5

Lessee Operating Lease Liability Payments Due Year Five

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearFive

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearFive


Lessee
Period End2020-12-31
Value47
Percentage of LesseeOperatingLeaseLiabilityPaymentsDueYearFive100.0
Percentage of Assets0.3

Lessee Operating Lease Liability Payments Due After Year Five

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueAfterYearFive

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueAfterYearFive


Lessee
Period End2020-12-31
Value34
Percentage of LesseeOperatingLeaseLiabilityPaymentsDueAfterYearFive100.0
Percentage of Assets0.2

Operating Lease Liability

us-gaap:OperatingLeaseLiability

us-gaap:OperatingLeaseLiability


Operating
Period End2020-12-312019-12-312019-09-302019-06-302019-03-312019-01-01
Value347556573587603321
Percentage of OperatingLeaseLiability100.0100.0100.0100.0100.0100.0
Percentage of Assets2.34.46.06.46.30.0

us-gaap:OperatingLeaseLiability us-gaap:PropertyPlantAndEquipmentByType

nrg:LeasedAssetsPowertonFacilityAndUnits7And8OfTheJolietFacility


Operating
Period End2020-09-29
Value148
Percentage of OperatingLeaseLiability0.0
Percentage of Assets0.0
Percentage of Assets nrg:LeasedAssetsPowertonFacilityAndUnits7And8OfTheJolietFacility0.0

Lessee Operating Lease Liability Payments Due

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDue

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDue


Lessee
Period End2020-12-31
Value401
Percentage of LesseeOperatingLeaseLiabilityPaymentsDue100.0
Percentage of Assets2.7

Lessee Operating Lease Liability Undiscounted Excess Amount

us-gaap:LesseeOperatingLeaseLiabilityUndiscountedExcessAmount

us-gaap:LesseeOperatingLeaseLiabilityUndiscountedExcessAmount


Lessee
Period End2020-12-31
Value54
Percentage of LesseeOperatingLeaseLiabilityUndiscountedExcessAmount100.0
Percentage of Assets0.4

Stockholders Equity Including Portion Attributable To Noncontrolling Interest

us-gaap:StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest

us-gaap:StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest


Stockholders
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312009-12-312008-12-312007-12-31
Value2544151716801934175015361658-1571.0-1648.0-1538.0-1234.0-936.02071225819683690348340134446549351215381543411839120171137711676116901097710394104691088110303101961053378907903763376697932832876018072769771235519
Percentage of StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets11.87.911.315.814.212.013.2-16.5-18.0-16.1-11.6-8.29.09.58.414.513.813.614.617.416.316.516.529.629.828.228.729.229.229.730.931.229.928.830.029.028.426.828.732.032.930.430.032.90.00.0

us-gaap:StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest us-gaap:ConsolidatedEntities

srt:GuarantorSubsidiaries


Stockholders
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302017-12-31
Value2511327937783555361230812553360228843854
Percentage of StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest129.8187.4246.0214.4-229.9-187.0-166.0-291.9-308.1195.8
Percentage of Assets20.526.629.528.437.933.626.833.925.216.5
Percentage of Assets srt:GuarantorSubsidiaries41.846.948.447.546.544.137.846.136.249.7

srt:NonGuarantorSubsidiaries


Stockholders
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302017-12-31
Value2498141615021926183315281671153315885519
Percentage of StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest129.280.997.8116.2-116.7-92.7-108.6-124.2-169.7280.4
Percentage of Assets20.411.511.715.419.216.717.514.413.923.7
Percentage of Assets srt:NonGuarantorSubsidiaries78.766.569.571.565.362.071.755.355.534.5

srt:ParentCompany


Stockholders
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302017-12-31
Value1934175015361672-1553.0-1630.0-1520.0-1216.0-553.0471
Percentage of StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest100.0100.0100.0100.898.998.998.898.559.123.9
Percentage of Assets15.814.212.013.3-16.3-17.8-15.9-11.4-4.82.0
Percentage of Assets srt:ParentCompany20.518.816.019.3-27.0-31.4-28.0-20.1-8.15.7

us-gaap:StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest us-gaap:ConsolidationItems

srt:ConsolidationEliminations


Stockholders
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302017-12-31
Value-5009.0-4695.0-5280.0-5495.0-5463.0-4627.0-4242.0-5153.0-4855.0-7876.0
Percentage of StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest-259.0-268.3-343.8-331.4347.7280.8275.8417.6518.7-400.2
Percentage of Assets-41.0-38.1-41.2-43.9-57.3-50.5-44.5-48.5-42.4-33.8
Percentage of Assets srt:ConsolidationEliminations78.377.378.087.480.384.785.185.878.693.0

us-gaap:StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest us-gaap:StatementEquityComponents

us-gaap:AccumulatedOtherComprehensiveIncome


Stockholders
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-312010-12-312009-12-312008-12-312007-12-31
Value-182.0-203.0-206.0-190.0-194.0-207.0-192.0-158.0-99.0-96.0-94.0-58.0-60.0-61.0-72.0-135.0-173.0-174.05.0-150.074432416310-115.0
Percentage of StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest-7.2-13.4-12.3-9.8-11.1-13.5-11.610.16.06.27.66.2-2.9-2.7-3.7-3.0-3.2-1.50.0-1.41.05.45.44.4-2.1
Percentage of Assets-0.8-1.1-1.4-1.6-1.6-1.6-1.5-1.7-1.1-1.0-0.9-0.5-0.3-0.3-0.3-0.4-0.5-0.40.0-0.40.31.61.80.00.0
Percentage of Assets us-gaap:AccumulatedOtherComprehensiveIncome0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:AdditionalPaidInCapital


Stockholders
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-312010-12-312009-12-312008-12-312007-12-31
Value8519851385178511850584988501849484888473851084538481837983768358829683277840758753465323494843504124
Percentage of StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest334.9561.2507.0440.1486.0553.3512.7-540.7-515.0-550.9-689.6-903.1409.5371.1425.6188.0152.771.374.972.069.765.964.361.174.7
Percentage of Assets39.444.257.269.668.966.367.889.292.688.980.173.837.035.335.927.525.220.523.121.620.019.821.20.00.0
Percentage of Assets us-gaap:AdditionalPaidInCapital0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:CommonStock


Stockholders
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-312010-12-312009-12-312008-12-312007-12-31
Value4.04.04.04.04.04.04.04.04.04.04.04.04.04.04.04.04.04.04.04.03.03.03.03.03.0
Percentage of StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest0.20.30.20.20.20.30.2-0.3-0.2-0.3-0.3-0.40.20.20.20.10.10.00.00.00.00.00.00.00.1
Percentage of Assets0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0
Percentage of Assets us-gaap:CommonStock0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:RetainedEarnings


Stockholders
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-312010-12-312009-12-312008-12-312007-12-31
Value-567.0-1565.0-1403.0-1157.0-1331.0-1570.0-1616.0-4991.0-5355.0-5548.0-6022.0-6001.0-5920.0-5982.0-6268.0-3787.0-3007.035883695449439873800333224231253
Percentage of StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest-22.3-103.2-83.5-59.8-76.1-102.2-97.5317.7324.9360.7488.0641.1-285.9-264.9-318.5-85.2-55.330.735.342.752.047.143.334.022.7
Percentage of Assets-2.6-8.1-9.4-9.5-10.8-12.2-12.9-52.4-58.4-58.2-56.7-52.4-25.8-25.2-26.9-12.5-9.18.810.912.814.914.114.30.00.0
Percentage of Assets us-gaap:RetainedEarnings0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:TreasuryStock


Stockholders
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-312010-12-312009-12-312008-12-312007-12-31
Value-5230.0-5232.0-5232.0-5234.0-5234.0-5189.0-5039.0-4920.0-4686.0-4371.0-3632.0-3334.0-2871.0-2474.0-2386.0-2399.0-2413.0-1983.0-1942.0-1920.0-1924.0-1503.0-1163.0-823.0-638.0
Percentage of StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest-205.6-344.9-311.4-270.6-299.1-337.8-303.9313.2284.3284.2294.3356.2-138.6-109.6-121.2-54.0-44.4-17.0-18.6-18.2-25.1-18.6-15.1-11.6-11.6
Percentage of Assets-24.2-27.2-35.1-42.8-42.4-40.5-40.2-51.6-51.1-45.9-34.2-29.1-12.5-10.4-10.2-7.9-7.3-4.9-5.7-5.5-7.2-5.6-5.00.00.0
Percentage of Assets us-gaap:TreasuryStock0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

Common Stock Value

us-gaap:CommonStockValue

us-gaap:CommonStockValue


Common
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312009-12-31
Value4000000.04000000.04000000.04000000.04000000.04000000.04000000.04000000.04000000.04000000.04000000.04000000.04000000.04000000.04000000.04000000.04000000.04000000.04000000.04000000.04000000.04000000.04000000.04000000.04000000.04000000.04000000.04000000.04000000.04000000.04000000.04000000.04000000.04000000.04000000.03000000.03000000.03000000.03000000.03000000.03000000.03000000.03000000.03000000.0
Percentage of CommonStockValue100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

Additional Paid In Capital Common Stock

us-gaap:AdditionalPaidInCapitalCommonStock

us-gaap:AdditionalPaidInCapitalCommonStock


Additional
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312009-12-31
Value85198513851785118505849885018494848884738510845384818379837683698383837583588370830682998296838283658362832783148303784278407843761576027587538853835374534653485339533053234948
Percentage of AdditionalPaidInCapitalCommonStock100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets39.444.257.269.668.966.367.889.292.688.980.173.837.035.335.932.933.328.527.526.626.425.425.221.020.720.720.520.722.122.423.122.522.121.521.619.819.318.820.021.621.121.319.821.2

Retained Earnings Accumulated Deficit

us-gaap:RetainedEarningsAccumulatedDeficit

us-gaap:RetainedEarningsAccumulatedDeficit


Retained
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312009-12-31
Value-567.0-1565.0-1403.0-1157.0-1331.0-1570.0-1616.0-4991.0-5355.0-5548.0-6022.0-6001.0-5920.0-5982.0-6268.0-4713.0-4874.0-4238.0-3787.0-2791.0-3179.0-2977.0-3007.0335833463413358835643445359436954272417941244494400240263777398740994156353838003332
Percentage of RetainedEarningsAccumulatedDeficit100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets-2.6-8.1-9.4-9.5-10.8-12.2-12.9-52.4-58.4-58.2-56.7-52.4-25.8-25.2-26.9-18.5-19.3-14.4-12.5-8.9-10.1-9.1-9.18.48.38.58.88.99.210.310.912.312.111.712.814.714.513.214.916.616.414.114.114.3

Accumulated Other Comprehensive Income Loss Net Of Tax

us-gaap:AccumulatedOtherComprehensiveIncomeLossNetOfTax

us-gaap:AccumulatedOtherComprehensiveIncomeLossNetOfTax


Accumulated
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312009-12-31
Value-182.0-203.0-206.0-190.0-194.0-207.0-192.0-158.0-99.0-96.0-94.0-58.0-60.0-61.0-72.0-91.0-100.0-124.0-135.0-142.0-203.0-195.0-173.0-188.0-170.0-191.0-174.0-5.05.010.05.0-129.0-118.0-136.0-150.0-68.0-17.07174201305363432416
Percentage of AccumulatedOtherComprehensiveIncomeLossNetOfTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets-0.8-1.1-1.4-1.6-1.6-1.6-1.5-1.7-1.1-1.0-0.9-0.5-0.3-0.3-0.3-0.4-0.4-0.4-0.4-0.5-0.6-0.6-0.5-0.5-0.4-0.5-0.4-0.00.00.00.0-0.4-0.3-0.4-0.4-0.2-0.10.20.30.81.21.41.61.8

Treasury Stock Value

us-gaap:TreasuryStockValue

us-gaap:TreasuryStockValue


Treasury
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312009-12-31
Value52305232523252345234518950394920468643713632333428712474238623862392239223992399240624062413233021662059198319391940194019421942194419441920192019221922192418811633163315031163
Percentage of TreasuryStockValue100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets24.227.235.142.842.440.540.251.651.145.934.229.112.510.410.29.49.58.17.97.67.77.47.35.85.45.14.94.85.25.55.75.65.65.55.57.16.96.77.27.66.46.55.65.0

Stock Issued During Period Value New Issues

us-gaap:StockIssuedDuringPeriodValueNewIssues

us-gaap:StockIssuedDuringPeriodValueNewIssues


Stock
Period End2021-03-312020-06-302019-09-302019-03-312018-09-302018-06-302018-03-31
Value1.01.01.05.04.04.07.0
Percentage of StockIssuedDuringPeriodValueNewIssues100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets0.00.00.00.00.00.00.0

us-gaap:StockIssuedDuringPeriodValueNewIssues us-gaap:StatementEquityComponents

us-gaap:AdditionalPaidInCapital


Stock
Period End2021-03-312020-06-302019-09-302019-03-312018-09-302018-06-302018-03-31
Value1.01.01.05.04.04.07.0
Percentage of StockIssuedDuringPeriodValueNewIssues100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets0.00.00.00.00.00.00.0
Percentage of Assets us-gaap:AdditionalPaidInCapital0.00.00.00.00.00.00.0

Adjustments To Additional Paid In Capital Sharebased Compensation Requisite Service Period Recognition Value

us-gaap:AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue

us-gaap:AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue


Adjustments
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-31
Value6.0-5.06.06.0-21.05.05.0-32.04.08.0-10.0
Percentage of AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets0.00.00.00.00.00.00.00.00.00.00.0

us-gaap:AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue us-gaap:StatementEquityComponents

us-gaap:AdditionalPaidInCapital


Adjustments
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-31
Value6.0-5.06.06.0-21.05.05.0-32.04.08.0-10.0
Percentage of AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets0.00.00.00.00.00.00.00.00.00.00.0
Percentage of Assets us-gaap:AdditionalPaidInCapital0.00.00.00.00.00.00.00.00.00.00.0

Net Cash Provided By Used In Operating Activities

us-gaap:NetCashProvidedByUsedInOperatingActivities

us-gaap:NetCashProvidedByUsedInOperatingActivities


Net
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value1294-917.0451694484208552472516-127.0295558167357581732142-68.0339860319554-83.0934198260396744-21.039144790146-124.091473661-76.049835993216482536491114
Percentage of NetCashProvidedByUsedInOperatingActivities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax24.7-11.623.025.922.810.825.118.828.9-7.114.826.98.719.623.324.05.3-2.513.421.812.117.2-2.821.15.86.89.416.3-0.611.216.025.81.6-6.04.420.330.5-4.123.413.44.110.826.520.023.05.1

us-gaap:NetCashProvidedByUsedInOperatingActivities us-gaap:ConsolidatedEntities

srt:GuarantorSubsidiaries


Net
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value-5.01923203-14.06616009.01156-66.01908221725
Percentage of NetCashProvidedByUsedInOperatingActivities-0.7397.397.6-2.5140.0116.3-7.1391.9-11.8113.8230.3296.9
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax-0.290.510.5-0.626.433.70.558.0-3.29.945.169.1
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax srt:GuarantorSubsidiaries0.00.00.00.00.00.00.00.00.00.00.00.0

srt:NonGuarantorSubsidiaries


Net
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value-604.0-128.063-23.051114-51.0-106.0303514-219.0688
Percentage of NetCashProvidedByUsedInOperatingActivities-87.0-26.430.3-4.210.822.140.2-35.954.3307.8-61.3118.4
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax-22.5-6.03.3-1.02.06.4-2.9-5.314.626.7-12.027.6
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax srt:NonGuarantorSubsidiaries0.00.00.00.00.00.00.00.00.00.00.00.0

srt:ParentCompany


Net
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value1303-1311.0-58.0589-240.0-198.0-85.0-755.0332-541.0-253.0-1539.0
Percentage of NetCashProvidedByUsedInOperatingActivities187.8-270.9-27.9106.7-50.8-38.466.9-255.959.5-324.0-70.9-264.9
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax48.5-61.7-3.026.8-9.6-11.1-4.8-37.916.0-28.1-13.9-61.6
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax srt:ParentCompany0.00.00.00.00.00.00.00.00.00.00.00.0

Net Cash Provided By Used In Investing Activities

us-gaap:NetCashProvidedByUsedInInvestingActivities

us-gaap:NetCashProvidedByUsedInInvestingActivities


Net
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value-128.0-3364.0-10.0-339.0-77.0-68.0-58.0-489.0-93.01196-146.01087-714.0-432.0-301.0-220.0-313.0-232.0-503.0148-326.0-143.0-253.0-372.0-590.0-270.055-1205.0-1877.0124-497.0-656.0-539.0-836.067-774.0-1012.0-543.0-886.0-1102.0-831.0-228.0-1053.0-185.0-191.0-194.0
Percentage of NetCashProvidedByUsedInInvestingActivities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax-2.4-42.4-0.5-12.6-3.6-3.5-2.6-19.5-5.267.2-7.352.4-37.0-23.7-12.1-7.2-11.6-8.4-19.93.7-12.4-4.4-8.4-8.4-17.4-7.11.3-26.4-51.83.6-17.8-18.8-18.4-40.23.2-33.2-46.7-29.2-41.6-41.2-36.5-11.4-58.0-6.9-9.0-8.8

us-gaap:NetCashProvidedByUsedInInvestingActivities us-gaap:ConsolidatedEntities

srt:GuarantorSubsidiaries


Net
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value-65.0-57.0-57.0-50.0-376.0-56.0-60.0-81.0-45.0-52.0-80.0-70.0
Percentage of NetCashProvidedByUsedInInvestingActivities19.274.083.886.276.960.2-5.055.5-4.17.318.523.3
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax-2.4-2.7-3.0-2.3-15.0-3.1-3.4-4.1-2.2-2.7-4.4-2.8
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax srt:GuarantorSubsidiaries0.00.00.00.00.00.00.00.00.00.00.00.0

srt:NonGuarantorSubsidiaries


Net
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value-268.0-12.0-6.0-1.0-109.0-10.0356-56.0-247.0-734.0-401.0-355.0
Percentage of NetCashProvidedByUsedInInvestingActivities79.115.68.81.722.310.829.838.4-22.7102.892.8117.9
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax-10.0-0.6-0.3-0.0-4.4-0.620.0-2.8-11.9-38.1-22.0-14.2
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax srt:NonGuarantorSubsidiaries0.00.00.00.00.00.00.00.00.00.00.00.0

srt:ParentCompany


Net
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value6961124752841923711900-9.012382412179
Percentage of NetCashProvidedByUsedInInvestingActivities-205.3-1459.7-1105.9-1450.0-188.8-764.575.36.2113.9-33.8-4.9-26.2
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax25.952.939.138.336.939.950.6-0.559.712.51.23.2
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax srt:ParentCompany0.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:NetCashProvidedByUsedInInvestingActivities us-gaap:ConsolidationItems

srt:ConsolidationEliminations


Net
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value-702.0-1132.0-757.0-848.0-927.0-738.00.00.0157-157.00.0129
Percentage of NetCashProvidedByUsedInInvestingActivities207.11470.11113.21462.1189.6793.50.0-0.014.422.0-0.0-42.9
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax-26.2-53.3-39.3-38.6-37.0-41.40.00.07.6-8.10.05.2
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax srt:ConsolidationEliminations0.00.00.00.00.00.00.00.00.00.00.00.0

Net Cash Provided By Used In Financing Activities

us-gaap:NetCashProvidedByUsedInFinancingActivities

us-gaap:NetCashProvidedByUsedInFinancingActivities


Net
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value-831.09242771-98.0-762.0293-386.0-42.0-972.0-748.0-860.0-1089.0472-49.0-544.041171-153.0-305.041-266.0-264.0-406.0-455.038940-276.0907218416176515156580320764488527366-65.0-36.0-232.07692261-408.0
Percentage of NetCashProvidedByUsedInFinancingActivities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax-15.911.7141.6-3.7-35.915.2-17.6-1.7-54.5-42.0-43.2-52.524.5-2.7-21.81.36.3-5.5-12.01.0-10.1-8.2-13.5-10.311.51.0-6.619.96.011.96.314.85.327.915.532.822.528.317.2-2.4-1.6-11.64.234.32.9-18.4

us-gaap:NetCashProvidedByUsedInFinancingActivities us-gaap:ConsolidatedEntities

srt:GuarantorSubsidiaries


Net
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value47-1881.0-125.069-292.0-528.0-4.0-1056.0123-287.0-481.0-1643.0
Percentage of NetCashProvidedByUsedInFinancingActivities-48.0246.9-42.7-17.9695.254.30.5122.8-11.3-60.8981.6302.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax1.8-88.6-6.53.1-11.7-29.6-0.2-53.05.9-14.9-26.4-65.8
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax srt:GuarantorSubsidiaries0.00.00.00.00.00.00.00.00.00.00.00.0

srt:NonGuarantorSubsidiaries


Net
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value876142-59.01856-105.0-281.0162-208.0129506-340.0
Percentage of NetCashProvidedByUsedInFinancingActivities-893.9-18.6-20.1-4.7-133.310.837.6-18.819.127.3-1032.762.5
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax32.66.7-3.10.82.2-5.9-15.88.1-10.06.727.8-13.6
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax srt:NonGuarantorSubsidiaries0.00.00.00.00.00.00.00.00.00.00.00.0

srt:ParentCompany


Net
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value-1723.0-155.0-280.0-1321.0-733.0-1077.0-463.034-874.0465-39.01188
Percentage of NetCashProvidedByUsedInFinancingActivities1758.220.3-95.6342.21745.2110.861.9-4.080.398.579.6-218.4
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax-64.2-7.3-14.5-60.2-29.3-60.4-26.01.7-42.124.1-2.147.6
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax srt:ParentCompany0.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:NetCashProvidedByUsedInFinancingActivities us-gaap:ConsolidationItems

srt:ConsolidationEliminations


Net
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value70211327578489277380.00.0-157.01570.0-129.0
Percentage of NetCashProvidedByUsedInFinancingActivities-716.3-148.6258.4-219.7-2207.1-75.9-0.0-0.014.433.3-0.023.7
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax26.253.339.338.637.041.40.00.0-7.68.10.0-5.2
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax srt:ConsolidationEliminations0.00.00.00.00.00.00.00.00.00.00.00.0

Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Including Exchange Rate Effect

us-gaap:CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect

us-gaap:CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect


Cash
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-30
Value335-3356.03212256-356.0433108-59.0-549.0272-807.0533-75.0-124.0-255.0551213-359.0-317.0541
Percentage of CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax6.4-42.3164.19.5-16.822.54.9-2.4-30.815.3-40.525.7-3.9-6.8-10.218.17.9-13.0-12.513.7

us-gaap:CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect us-gaap:ConsolidatedEntities

srt:GuarantorSubsidiaries


Cash
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value-23.0-15.0215.0-7.016-72.0-70.064-170.023018
Percentage of CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect-9.04.24.84.611.9-2.9-26.58.712.0226.7-185.5-7.1
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax-0.9-0.71.10.2-0.30.9-4.0-3.53.1-8.812.60.7
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax srt:GuarantorSubsidiaries0.00.00.00.00.00.00.00.00.00.00.00.0

srt:NonGuarantorSubsidiaries


Cash
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value3.01.0-2.0-6.0-2.0-1.0-8.0-7.0-217.0-134.0-29.0-31.0
Percentage of CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect1.2-0.3-0.5-5.63.40.2-2.90.9-40.7178.723.412.2
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax0.10.0-0.1-0.3-0.1-0.1-0.4-0.4-10.5-7.0-1.6-1.2
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax srt:NonGuarantorSubsidiaries0.00.00.00.00.00.00.00.00.00.00.00.0

srt:ParentCompany


Cash
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value276-342.0414109-50.0-564.0352-730.0696165-271.0-272.0
Percentage of CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect107.896.195.6100.984.7102.7129.490.5130.6-220.0218.5106.7
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax10.3-16.121.55.0-2.0-31.619.8-36.633.58.6-14.9-10.9
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax srt:ParentCompany0.00.00.00.00.00.00.00.00.00.00.00.0

Depreciation Depletion And Amortization

us-gaap:DepreciationDepletionAndAmortization

us-gaap:DepreciationDepletionAndAmortization


Depreciation
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value533171179911010911291858551112227235267272260300388357309313393382396395427375386335335318305298247239234230231238222205218210208202
Percentage of DepreciationDepletionAndAmortization100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DepreciationDepletionAndAmortization us-gaap:ConsolidatedEntities

srt:GuarantorSubsidiaries


Depreciation
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-30
Value728080555251542267636044100
Percentage of DepreciationDepletionAndAmortization72.772.773.449.157.160.063.543.159.827.825.516.536.8

srt:NonGuarantorSubsidiaries


Depreciation
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-30
Value21201949322623213640525455
Percentage of DepreciationDepletionAndAmortization21.218.217.443.835.230.627.141.232.117.622.120.220.2

srt:ParentCompany


Depreciation
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-30
Value6.010.010.08.07.08.08.08.09.09.08.08.08.0
Percentage of DepreciationDepletionAndAmortization6.19.19.27.17.79.49.415.78.04.03.43.02.9

us-gaap:DepreciationDepletionAndAmortization us-gaap:ConsolidationItems

us-gaap:CorporateNonSegment


Depreciation
Period End2021-06-302021-03-312020-06-302020-03-31
Value7.07.010.09.0
Percentage of DepreciationDepletionAndAmortization13.22.29.18.3

us-gaap:DepreciationDepletionAndAmortization us-gaap:ConsolidationItems, us-gaap:StatementBusinessSegments

us-gaap:OperatingSegments, nrg:East


Depreciation
Period End2020-09-302020-06-302020-03-312019-09-302019-06-302019-03-31
Value343333313026
Percentage of DepreciationDepletionAndAmortization34.330.030.334.135.330.6

us-gaap:OperatingSegments, nrg:EastSegment


Depreciation
Period End2021-06-302021-03-312020-06-302020-03-31
Value-54.02093232
Percentage of DepreciationDepletionAndAmortization-101.965.929.129.4

us-gaap:OperatingSegments, nrg:TexasSegment


Depreciation
Period End2021-06-302021-03-312020-06-302020-03-31
Value84775959
Percentage of DepreciationDepletionAndAmortization158.524.353.654.1

us-gaap:OperatingSegments, nrg:WestAndOther


Depreciation
Period End2020-09-302020-06-302020-03-312019-09-302019-06-302019-03-31
Value9.08.08.08.07.011
Percentage of DepreciationDepletionAndAmortization9.17.37.38.88.212.9

us-gaap:OperatingSegments, nrg:WestServicesAndOtherSegment


Depreciation
Period End2021-06-302021-03-312020-06-302020-03-31
Value16249.09.0
Percentage of DepreciationDepletionAndAmortization30.27.68.28.3

us-gaap:OperatingSegments, stpr:TX


Depreciation
Period End2020-09-302020-06-302020-03-312019-09-302019-06-302019-03-31
Value495959454040
Percentage of DepreciationDepletionAndAmortization49.553.654.149.547.147.1

us-gaap:OperatingSegments, us-gaap:Corporate


Depreciation
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-30
Value7.010.09.08.07.08.08.08.07.08.08.08.08.08.08.0121514
Percentage of DepreciationDepletionAndAmortization7.19.18.37.17.79.49.415.76.23.53.43.02.93.12.73.14.24.5

Increase Decrease In Other Operating Capital Net

us-gaap:IncreaseDecreaseInOtherOperatingCapitalNet

us-gaap:IncreaseDecreaseInOtherOperatingCapitalNet


Increase
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value-178.0843-153.03810099-416.0214118270-271.0-26.0262139-164.01.0180199-16.0-247.023412156-195.025533-144.0297129-65.047-52.042137-566.02122542-226.0-80.061241-177.0-57.0119105
Percentage of IncreaseDecreaseInOtherOperatingCapitalNet100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:IncreaseDecreaseInOtherOperatingCapitalNet us-gaap:ConsolidatedEntities

srt:GuarantorSubsidiaries


Increase
Period End2020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-31
Value-479.0-6.013058122221719125-277.0
Percentage of IncreaseDecreaseInOtherOperatingCapitalNet-1260.5-6.0131.327.1103.481.9-2765.447.7-199.3

srt:NonGuarantorSubsidiaries


Increase
Period End2020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-31
Value9045.01456-73.01375.0-283.0339
Percentage of IncreaseDecreaseInOtherOperatingCapitalNet2378.95.014.126.2-61.950.7-19.2-108.0243.9

srt:ParentCompany


Increase
Period End2020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-31
Value-387.0101-45.0100-240.02214121.0444
Percentage of IncreaseDecreaseInOtherOperatingCapitalNet-1018.4101.0-45.546.7-203.481.9-1584.60.4319.4

Net Cash Provided By Used In Operating Activities

us-gaap:NetCashProvidedByUsedInOperatingActivities

us-gaap:NetCashProvidedByUsedInOperatingActivities


Net
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value1294-917.0451694484208552472516-127.0295558167357581732142-68.0339860319554-83.0934198260396744-21.039144790146-124.091473661-76.049835993216482536491114
Percentage of NetCashProvidedByUsedInOperatingActivities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax24.7-11.623.025.922.810.825.118.828.9-7.114.826.98.719.623.324.05.3-2.513.421.812.117.2-2.821.15.86.89.416.3-0.611.216.025.81.6-6.04.420.330.5-4.123.413.44.110.826.520.023.05.1

us-gaap:NetCashProvidedByUsedInOperatingActivities us-gaap:ConsolidatedEntities

srt:GuarantorSubsidiaries


Net
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value-5.01923203-14.06616009.01156-66.01908221725
Percentage of NetCashProvidedByUsedInOperatingActivities-0.7397.397.6-2.5140.0116.3-7.1391.9-11.8113.8230.3296.9
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax-0.290.510.5-0.626.433.70.558.0-3.29.945.169.1
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax srt:GuarantorSubsidiaries0.00.00.00.00.00.00.00.00.00.00.00.0

srt:NonGuarantorSubsidiaries


Net
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value-604.0-128.063-23.051114-51.0-106.0303514-219.0688
Percentage of NetCashProvidedByUsedInOperatingActivities-87.0-26.430.3-4.210.822.140.2-35.954.3307.8-61.3118.4
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax-22.5-6.03.3-1.02.06.4-2.9-5.314.626.7-12.027.6
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax srt:NonGuarantorSubsidiaries0.00.00.00.00.00.00.00.00.00.00.00.0

srt:ParentCompany


Net
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value1303-1311.0-58.0589-240.0-198.0-85.0-755.0332-541.0-253.0-1539.0
Percentage of NetCashProvidedByUsedInOperatingActivities187.8-270.9-27.9106.7-50.8-38.466.9-255.959.5-324.0-70.9-264.9
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax48.5-61.7-3.026.8-9.6-11.1-4.8-37.916.0-28.1-13.9-61.6
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax srt:ParentCompany0.00.00.00.00.00.00.00.00.00.00.00.0

Net Income Loss

us-gaap:NetIncomeLoss

us-gaap:NetIncomeLoss


Net
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312009-09-302009-06-302009-03-31
Value1078-82.0-173.02493131213383372201482-12.0-72.072279-1535.0171-626.0-163.0-987.0402-271.082-6314.066-14.0-120.0119168-97.0-56.0-290.0124130-328.0516-1.0251-207.0-109.0-55.0621-260.0-15.02232115833278433198
Percentage of NetIncomeLoss100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax20.6-1.0-8.89.314.76.3154.114.911.327.1-0.6-3.53.715.3-61.55.6-23.2-5.9-39.010.2-10.32.5-209.71.5-0.4-3.12.83.7-2.7-1.6-10.43.64.4-15.825.0-0.011.6-11.1-5.1-2.127.3-13.0-0.88.39.92.61.59.519.411.9

us-gaap:NetIncomeLoss us-gaap:ConsolidatedEntities

srt:GuarantorSubsidiaries


Net
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-30
Value492573269261588389255148306211331-316.0342
Percentage of NetIncomeLoss197.6183.1222.37.7158.1193.552.9-1233.3-425.0293.1118.620.6200.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax18.327.014.011.923.521.814.37.414.710.918.2-12.711.2
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax srt:GuarantorSubsidiaries0.00.00.00.00.00.00.00.00.00.00.00.00.0

srt:NonGuarantorSubsidiaries


Net
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-30
Value4813-4.051-31.04354-4.01661492.0-396.0124
Percentage of NetIncomeLoss19.34.2-3.31.5-8.321.411.233.3-230.6206.90.725.872.5
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax1.80.6-0.22.3-1.22.43.0-0.28.07.70.1-15.94.1
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax srt:NonGuarantorSubsidiaries0.00.00.00.00.00.00.00.00.00.00.00.00.0

srt:ParentCompany


Net
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-30
Value2493131213383372201482-12.0-72.072279-1534.0171
Percentage of NetIncomeLoss100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.099.9100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax9.314.76.3154.114.911.327.1-0.6-3.53.715.3-61.45.6
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax srt:ParentCompany0.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:NetIncomeLoss us-gaap:ConsolidationItems

srt:ConsolidationEliminations


Net
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-30
Value-540.0-586.0-265.0-312.0-557.0-432.0-309.0-144.0-472.0-360.0-333.0712-466.0
Percentage of NetIncomeLoss-216.9-187.2-219.0-9.2-149.7-214.9-64.11200.0655.6-500.0-119.4-46.4-272.5
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax-20.1-27.6-13.8-14.2-22.2-24.2-17.4-7.2-22.7-18.7-18.328.5-15.3
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax srt:ConsolidationEliminations0.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:CorporateNonSegment


Net
Period End2021-06-302021-03-312020-06-302020-03-31
Value-526.0-79.0-209.0-105.0
Percentage of NetIncomeLoss-48.896.3-66.8-86.8
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax-10.0-1.0-9.8-5.5
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:CorporateNonSegment0.00.00.00.0

us-gaap:NetIncomeLoss us-gaap:ConsolidationItems, us-gaap:StatementBusinessSegments

us-gaap:OperatingSegments, nrg:East


Net
Period End2020-09-302020-06-302020-03-312019-09-302019-06-302019-03-31
Value149146241216099
Percentage of NetIncomeLoss59.846.619.832.529.920.5
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax5.66.91.24.83.45.6
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:OperatingSegments nrg:East25.830.44.819.813.117.8

us-gaap:OperatingSegments, nrg:EastSegment


Net
Period End2021-06-302021-03-312020-06-302020-03-31
Value77235314220
Percentage of NetIncomeLoss71.6-430.545.416.5
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax14.74.56.71.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:OperatingSegments nrg:EastSegment29.19.530.94.1

us-gaap:OperatingSegments, nrg:TexasSegment


Net
Period End2021-06-302021-03-312020-06-302020-03-31
Value792-425.0350162
Percentage of NetIncomeLoss73.5518.3111.8133.9
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax15.1-5.416.58.4
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:OperatingSegments nrg:TexasSegment39.1-11.822.312.0

us-gaap:OperatingSegments, nrg:WestAndOther


Net
Period End2020-09-302020-06-302020-03-312019-09-302019-06-302019-03-31
Value1725411517-23.0
Percentage of NetIncomeLoss6.88.033.94.08.5-4.8
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax0.61.22.10.61.0-1.3
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:OperatingSegments nrg:WestAndOther13.433.853.914.225.0-30.3

us-gaap:OperatingSegments, nrg:WestServicesAndOtherSegment


Net
Period End2021-06-302021-03-312020-06-302020-03-31
Value40692945
Percentage of NetIncomeLoss3.7-84.19.337.2
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax0.80.91.42.3
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:OperatingSegments nrg:WestServicesAndOtherSegment7.211.630.547.9

us-gaap:OperatingSegments, stpr:TX


Net
Period End2020-09-302020-06-302020-03-312019-09-302019-06-302019-03-31
Value288350162348259150
Percentage of NetIncomeLoss115.7111.8133.993.5128.931.1
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax10.716.58.413.914.58.4
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:OperatingSegments stpr:TX14.522.312.019.520.613.0

us-gaap:OperatingSegments, us-gaap:Corporate


Net
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-30
Value-205.0-209.0-105.03165-114.0-137.0284-1254.0-23.0-244.0-148.0-87.0-220.0-920.0-171.0-282.019-449.0
Percentage of NetIncomeLoss-82.3-66.8-86.893.6-30.6-68.258.910450.031.9-338.9-53.05.7-128.7147.0104.928.64.7165.7
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax-7.6-9.8-5.5144.2-4.6-7.716.0-63.0-1.1-12.7-8.1-3.5-7.2-34.1-6.2-11.10.5-17.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:OperatingSegments us-gaap:Corporate0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:NetIncomeLoss us-gaap:StatementEquityComponents

us-gaap:RetainedEarnings


Net
Period End2020-09-302020-06-302020-03-312019-09-302019-06-302019-03-31
Value249313121372201482
Percentage of NetIncomeLoss100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax9.314.76.314.911.327.1
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:RetainedEarnings0.00.00.00.00.00.0

Profit Loss

us-gaap:ProfitLoss

us-gaap:ProfitLoss


Profit
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value1078-82.0-173.02493131213385372202482-13.0-48.096233-1655.0163-642.0-203.0-1055.0393-276.047-6358.067-9.0-136.097182-80.0-67.0-290.0143137-327.05188.0259-206.0-109.0-55.0621-260.0-15.022321058
Percentage of ProfitLoss100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax20.6-1.0-8.89.314.76.3154.214.911.327.1-0.7-2.35.012.8-66.35.3-23.8-7.4-41.79.9-10.51.5-211.21.5-0.3-3.62.34.0-2.2-1.9-10.44.14.7-15.725.10.312.0-11.1-5.1-2.127.3-13.0-0.88.39.82.6

us-gaap:ProfitLoss us-gaap:ConsolidatedEntities

srt:GuarantorSubsidiaries


Profit
Period End2020-09-302020-06-302019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-30
Value492573261588389255148306211331-316.0342
Percentage of ProfitLoss197.6183.17.7158.1192.652.9-1138.5-637.5219.8142.119.1209.8
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax18.327.011.923.521.814.37.414.710.918.2-12.711.2
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax srt:GuarantorSubsidiaries0.00.00.00.00.00.00.00.00.00.00.00.0

srt:NonGuarantorSubsidiaries


Profit
Period End2020-09-302020-06-302019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-30
Value481353-31.04454-4.010593-61.0-515.0121
Percentage of ProfitLoss19.34.21.6-8.321.811.230.8-218.896.9-26.231.174.2
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax1.80.62.4-1.22.53.0-0.25.14.8-3.3-20.64.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax srt:NonGuarantorSubsidiaries0.00.00.00.00.00.00.00.00.00.00.00.0

srt:ParentCompany


Profit
Period End2020-09-302020-06-302019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-30
Value2493133383372201482-13.0-60.0150296-1605.0200
Percentage of ProfitLoss100.0100.099.9100.099.5100.0100.0125.0156.2127.097.0122.7
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax9.314.7154.114.911.327.1-0.7-2.97.816.2-64.36.6
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax srt:ParentCompany0.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:ProfitLoss us-gaap:ConsolidationItems

srt:ConsolidationEliminations


Profit
Period End2020-09-302020-06-302019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-30
Value-540.0-586.0-312.0-557.0-432.0-309.0-144.0-399.0-358.0-333.0781-500.0
Percentage of ProfitLoss-216.9-187.2-9.2-149.7-213.9-64.11107.7831.2-372.9-142.9-47.2-306.7
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax-20.1-27.6-14.2-22.2-24.2-17.4-7.2-19.2-18.6-18.331.3-16.4
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax srt:ConsolidationEliminations0.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:ProfitLoss us-gaap:StatementEquityComponents

us-gaap:RetainedEarnings


Profit
Period End2021-06-302021-03-312020-06-302020-03-31
Value1078-82.0313121
Percentage of ProfitLoss100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax20.6-1.014.76.3
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:RetainedEarnings0.00.00.00.0

Share Based Compensation

us-gaap:ShareBasedCompensation

us-gaap:ShareBasedCompensation


Share
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-30
Value6.04.05.05.07.05.05.05.06.04.0-11.010.013138.0118.08.0-13.07.08.08.04.013131110.08.0168.06.08.06.018149.0180.0140.0
Percentage of ShareBasedCompensation100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0100.00.0

us-gaap:ShareBasedCompensation us-gaap:ConsolidatedEntities

srt:ParentCompany


Share
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value5.07.05.05.05.06.04.0-11.0219.06.08.0
Percentage of ShareBasedCompensation100.0100.0100.0100.0100.0100.0100.0100.0210.069.246.2100.0

Net Cash Provided By Used In Investing Activities

us-gaap:NetCashProvidedByUsedInInvestingActivities

us-gaap:NetCashProvidedByUsedInInvestingActivities


Net
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value-128.0-3364.0-10.0-339.0-77.0-68.0-58.0-489.0-93.01196-146.01087-714.0-432.0-301.0-220.0-313.0-232.0-503.0148-326.0-143.0-253.0-372.0-590.0-270.055-1205.0-1877.0124-497.0-656.0-539.0-836.067-774.0-1012.0-543.0-886.0-1102.0-831.0-228.0-1053.0-185.0-191.0-194.0
Percentage of NetCashProvidedByUsedInInvestingActivities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax-2.4-42.4-0.5-12.6-3.6-3.5-2.6-19.5-5.267.2-7.352.4-37.0-23.7-12.1-7.2-11.6-8.4-19.93.7-12.4-4.4-8.4-8.4-17.4-7.11.3-26.4-51.83.6-17.8-18.8-18.4-40.23.2-33.2-46.7-29.2-41.6-41.2-36.5-11.4-58.0-6.9-9.0-8.8

us-gaap:NetCashProvidedByUsedInInvestingActivities us-gaap:ConsolidatedEntities

srt:GuarantorSubsidiaries


Net
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value-65.0-57.0-57.0-50.0-376.0-56.0-60.0-81.0-45.0-52.0-80.0-70.0
Percentage of NetCashProvidedByUsedInInvestingActivities19.274.083.886.276.960.2-5.055.5-4.17.318.523.3
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax-2.4-2.7-3.0-2.3-15.0-3.1-3.4-4.1-2.2-2.7-4.4-2.8
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax srt:GuarantorSubsidiaries0.00.00.00.00.00.00.00.00.00.00.00.0

srt:NonGuarantorSubsidiaries


Net
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value-268.0-12.0-6.0-1.0-109.0-10.0356-56.0-247.0-734.0-401.0-355.0
Percentage of NetCashProvidedByUsedInInvestingActivities79.115.68.81.722.310.829.838.4-22.7102.892.8117.9
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax-10.0-0.6-0.3-0.0-4.4-0.620.0-2.8-11.9-38.1-22.0-14.2
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax srt:NonGuarantorSubsidiaries0.00.00.00.00.00.00.00.00.00.00.00.0

srt:ParentCompany


Net
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value6961124752841923711900-9.012382412179
Percentage of NetCashProvidedByUsedInInvestingActivities-205.3-1459.7-1105.9-1450.0-188.8-764.575.36.2113.9-33.8-4.9-26.2
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax25.952.939.138.336.939.950.6-0.559.712.51.23.2
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax srt:ParentCompany0.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:NetCashProvidedByUsedInInvestingActivities us-gaap:ConsolidationItems

srt:ConsolidationEliminations


Net
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value-702.0-1132.0-757.0-848.0-927.0-738.00.00.0157-157.00.0129
Percentage of NetCashProvidedByUsedInInvestingActivities207.11470.11113.21462.1189.6793.50.0-0.014.422.0-0.0-42.9
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax-26.2-53.3-39.3-38.6-37.0-41.40.00.07.6-8.10.05.2
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax srt:ConsolidationEliminations0.00.00.00.00.00.00.00.00.00.00.00.0

Payments To Acquire Property Plant And Equipment

us-gaap:PaymentsToAcquirePropertyPlantAndEquipment

us-gaap:PaymentsToAcquirePropertyPlantAndEquipment


Payments
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value8063635150664576584943-346.0333358351218274268346276343279394306331252234168270237406300468813922881954639955516620219216160145185
Percentage of PaymentsToAcquirePropertyPlantAndEquipment100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:PaymentsToAcquirePropertyPlantAndEquipment us-gaap:ConsolidatedEntities

srt:GuarantorSubsidiaries


Payments
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value372850295841363455436045
Percentage of PaymentsToAcquirePropertyPlantAndEquipment72.556.075.864.476.370.773.579.1-15.912.916.812.8

srt:NonGuarantorSubsidiaries


Payments
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value8.0146.04.08.09.06.01.01.0757425
Percentage of PaymentsToAcquirePropertyPlantAndEquipment15.728.09.18.910.515.512.22.3-0.322.520.77.1

srt:ParentCompany


Payments
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value6.08.010.01210.08.07.08.07.09.02112
Percentage of PaymentsToAcquirePropertyPlantAndEquipment11.816.015.226.713.213.814.318.6-2.02.75.93.4

Net Cash Provided By Used In Financing Activities

us-gaap:NetCashProvidedByUsedInFinancingActivities

us-gaap:NetCashProvidedByUsedInFinancingActivities


Net
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value-831.09242771-98.0-762.0293-386.0-42.0-972.0-748.0-860.0-1089.0472-49.0-544.041171-153.0-305.041-266.0-264.0-406.0-455.038940-276.0907218416176515156580320764488527366-65.0-36.0-232.07692261-408.0
Percentage of NetCashProvidedByUsedInFinancingActivities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax-15.911.7141.6-3.7-35.915.2-17.6-1.7-54.5-42.0-43.2-52.524.5-2.7-21.81.36.3-5.5-12.01.0-10.1-8.2-13.5-10.311.51.0-6.619.96.011.96.314.85.327.915.532.822.528.317.2-2.4-1.6-11.64.234.32.9-18.4

us-gaap:NetCashProvidedByUsedInFinancingActivities us-gaap:ConsolidatedEntities

srt:GuarantorSubsidiaries


Net
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value47-1881.0-125.069-292.0-528.0-4.0-1056.0123-287.0-481.0-1643.0
Percentage of NetCashProvidedByUsedInFinancingActivities-48.0246.9-42.7-17.9695.254.30.5122.8-11.3-60.8981.6302.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax1.8-88.6-6.53.1-11.7-29.6-0.2-53.05.9-14.9-26.4-65.8
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax srt:GuarantorSubsidiaries0.00.00.00.00.00.00.00.00.00.00.00.0

srt:NonGuarantorSubsidiaries


Net
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value876142-59.01856-105.0-281.0162-208.0129506-340.0
Percentage of NetCashProvidedByUsedInFinancingActivities-893.9-18.6-20.1-4.7-133.310.837.6-18.819.127.3-1032.762.5
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax32.66.7-3.10.82.2-5.9-15.88.1-10.06.727.8-13.6
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax srt:NonGuarantorSubsidiaries0.00.00.00.00.00.00.00.00.00.00.00.0

srt:ParentCompany


Net
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value-1723.0-155.0-280.0-1321.0-733.0-1077.0-463.034-874.0465-39.01188
Percentage of NetCashProvidedByUsedInFinancingActivities1758.220.3-95.6342.21745.2110.861.9-4.080.398.579.6-218.4
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax-64.2-7.3-14.5-60.2-29.3-60.4-26.01.7-42.124.1-2.147.6
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax srt:ParentCompany0.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:NetCashProvidedByUsedInFinancingActivities us-gaap:ConsolidationItems

srt:ConsolidationEliminations


Net
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value70211327578489277380.00.0-157.01570.0-129.0
Percentage of NetCashProvidedByUsedInFinancingActivities-716.3-148.6258.4-219.7-2207.1-75.9-0.0-0.014.433.3-0.023.7
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax26.253.339.338.637.041.40.00.0-7.68.10.0-5.2
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax srt:ConsolidationEliminations0.00.00.00.00.00.00.00.00.00.00.00.0

Proceeds From Issuance Of Long Term Debt

us-gaap:ProceedsFromIssuanceOfLongTermDebt us-gaap:BusinessAcquisition

us-gaap:ProceedsFromIssuanceOfLongTermDebt

nrg:DirectEnergy


Proceeds
Period End2020-12-312020-07-24
Value29003000
Percentage of ProceedsFromIssuanceOfLongTermDebt100.0100.0