AGR


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:EarningsPerShareBasic

us-gaap:EarningsPerShareDiluted

us-gaap:ComprehensiveIncomeNetOfTax

us-gaap:ComprehensiveIncomeNetOfTaxAttributableToNoncontrollingInterest

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

us-gaap:IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest

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

us-gaap:IncomeTaxesPaidNet

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

us-gaap:InterestPaidNet

us-gaap:NetIncomeLoss

us-gaap:NetIncomeLossAttributableToNoncontrollingInterest

us-gaap:OperatingIncomeLoss
us-gaap:ConsolidationItems
us-gaap:ConsolidationItems, us-gaap:StatementBusinessSegments

us-gaap:OtherComprehensiveIncomeLossNetOfTax
us-gaap:StatementEquityComponents

us-gaap:OtherNonoperatingIncomeExpense

us-gaap:ProfitLoss
us-gaap:StatementEquityComponents

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

us-gaap:Revenues
us-gaap:ConsolidationItems
us-gaap:ConsolidationItems, us-gaap:StatementBusinessSegments
us-gaap:DerivativeInstrumentRisk, us-gaap:StatementBusinessSegments
us-gaap:IncomeStatementLocation, us-gaap:StatementBusinessSegments, us-gaap:TransactionType
us-gaap:StatementBusinessSegments

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

us-gaap:Liabilities
us-gaap:ConsolidatedEntities

us-gaap:LiabilitiesAndStockholdersEquity
us-gaap:ConsolidatedEntities

us-gaap:StockholdersEquity

us-gaap:AssetsCurrent
us-gaap:ConsolidatedEntities

us-gaap:CashAndCashEquivalentsAtCarryingValue
us-gaap:ConsolidatedEntities

us-gaap:CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents
us-gaap:ConsolidatedEntities

us-gaap:ShortTermInvestments

us-gaap:AccountsReceivableNetCurrent

us-gaap:OtherAssetsCurrent

us-gaap:PrepaidExpenseAndOtherAssetsCurrent
us-gaap:ConsolidatedEntities

us-gaap:ConstructionInProgressGross
us-gaap:PublicUtilityRegulatedOrUnregulatedStatus

us-gaap:AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment
us-gaap:PublicUtilityRegulatedOrUnregulatedStatus

us-gaap:PropertyPlantAndEquipmentNet
us-gaap:ConsolidatedEntities
us-gaap:ConsolidationItems
us-gaap:ConsolidationItems, us-gaap:StatementBusinessSegments
us-gaap:PublicUtilityRegulatedOrUnregulatedStatus
us-gaap:ConsolidatedEntities
us-gaap:InvestmentsInAffiliatesSubsidiariesAssociatesAndJointVentures

us-gaap:Goodwill
us-gaap:StatementBusinessSegments

us-gaap:IntangibleAssetsNetExcludingGoodwill

us-gaap:FiniteLivedIntangibleAssetsNet
us-gaap:FiniteLivedIntangibleAssetsByMajorClass

us-gaap:OperatingLeaseRightOfUseAsset

us-gaap:OtherAssetsNoncurrent
us-gaap:ConsolidatedEntities
us-gaap:RestrictedCashAndCashEquivalentsCashAndCashEquivalents

us-gaap:EquitySecuritiesFvNi
us-gaap:FairValueByFairValueHierarchyLevel

us-gaap:OtherAssets
us-gaap:ConsolidatedEntities

us-gaap:AccountsPayableAndAccruedLiabilitiesCurrent
us-gaap:ConsolidatedEntities

us-gaap:ContractWithCustomerLiabilityCurrent

us-gaap:DividendsPayableCurrent
us-gaap:ConsolidatedEntities

us-gaap:LiabilitiesCurrent
us-gaap:ConsolidatedEntities

us-gaap:LongTermDebtCurrent

us-gaap:NotesPayableCurrent

us-gaap:OperatingLeaseLiabilityCurrent

us-gaap:OtherLiabilitiesCurrent

us-gaap:TaxesPayableCurrent

us-gaap:LiabilitiesNoncurrent

us-gaap:LongTermDebt

us-gaap:LongTermDebtNoncurrent
us-gaap:ConsolidatedEntities

us-gaap:LongTermDebtAndCapitalLeaseObligations

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

us-gaap:MinorityInterest

us-gaap:OtherLiabilitiesNoncurrent

us-gaap:OperatingLeaseLiabilityNoncurrent

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearTwo

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearThree

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearFour

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearFive

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueAfterYearFive

us-gaap:OperatingLeaseLiability

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDue

us-gaap:LesseeOperatingLeaseLiabilityUndiscountedExcessAmount

us-gaap:StockholdersEquity

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

us-gaap:CommonStockValue

us-gaap:AdditionalPaidInCapitalCommonStock
us-gaap:ConsolidatedEntities

us-gaap:RetainedEarningsAccumulatedDeficit
us-gaap:ConsolidatedEntities

us-gaap:AccumulatedOtherComprehensiveIncomeLossNetOfTax
us-gaap:ConsolidatedEntities

us-gaap:MinorityInterest

us-gaap:StockIssuedDuringPeriodValueNewIssues
us-gaap:StatementEquityComponents

us-gaap:AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue
us-gaap:StatementEquityComponents

us-gaap:MinorityInterestDecreaseFromDistributionsToNoncontrollingInterestHolders
us-gaap:StatementEquityComponents

us-gaap:NetCashProvidedByUsedInOperatingActivities

us-gaap:NetCashProvidedByUsedInInvestingActivities

us-gaap:NetCashProvidedByUsedInFinancingActivities

us-gaap:CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect

us-gaap:NetCashProvidedByUsedInOperatingActivities

us-gaap:NetIncomeLoss

us-gaap:ProfitLoss
us-gaap:StatementEquityComponents

us-gaap:NetCashProvidedByUsedInInvestingActivities

us-gaap:PaymentsToAcquirePropertyPlantAndEquipment
us-gaap:ConsolidationItems, us-gaap:StatementBusinessSegments

us-gaap:NetCashProvidedByUsedInFinancingActivities

us-gaap:ProceedsFromIssuanceOfLongTermDebt

us-gaap:RepaymentsOfLongTermDebt

us-gaap:PaymentsOfDividends

us-gaap:Dividends
us-gaap:StatementEquityComponents

us-gaap:PaymentsForRepurchaseOfCommonStock
us-gaap:ConsolidatedEntities, us-gaap:DebtInstrument, us-gaap:LongtermDebtType
us-gaap:DebtInstrumentInterestRateStatedPercentage
us-gaap:ConsolidatedEntities, us-gaap:Range, us-gaap:DebtInstrument, us-gaap:LongtermDebtType

us-gaap:EffectiveIncomeTaxRateContinuingOperations

us-gaap:DeferredTaxLiabilities

us-gaap:DeferredTaxAssetsNet

us-gaap:UnrecognizedTaxBenefits

us-gaap:DeferredTaxAssetsValuationAllowance

agr:AcceleratedDepreciationFromRepowering

agr:AdjustedNetIncome
us-gaap:ConsolidationItems
us-gaap:ConsolidationItems, us-gaap:StatementBusinessSegments

agr:AlternativeRevenuePrograms
us-gaap:StatementBusinessSegments

agr:AmortizationOfRegulatoryAssetsLiabilities
dei:LegalEntity
agr:AmountOfApprovedReturnOnEquityYearOne
dei:LegalEntity
agr:AmountOfApprovedReturnOnEquityYearTwo
dei:LegalEntity, us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName
agr:AmountOfCommitmentFundedToDate
us-gaap:BusinessAcquisition
agr:BusinessCombinationMergerRelatedRateCredits

agr:ChangeInFairValueOfDerivativeInstrumentsDueToMarkToMarketAdjustmentRenewables

agr:ChangesInFairValueDerivativesRecognizedInRegulatoryAssetsAndLiabilitiesNet

agr:CostsIncurredImpactOfCovid19
dei:LegalEntity
agr:DeferredStormCostsNotIncludedInJointProposal

agr:DerivativeRevenue
us-gaap:StatementBusinessSegments
us-gaap:DisposalGroupClassification, us-gaap:IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperations
agr:DisposalGroupNotDiscontinuedOperationGainLossOnDisposalNetOfTax
us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName, us-gaap:StatementBusinessSegments
agr:EquityMethodInvestmentContributionAmount

agr:FairValueNetDerivativeAssetLiabilityMeasuredOnRecurringBasisUnobservableInputsReconciliationGainIncludedInEarnings

agr:FairValueNetDerivativeAssetLiabilityMeasuredOnRecurringBasisUnobservableInputsReconciliationGainIncludedInOtherComprehensiveIncomeLoss

agr:FairValueNetDerivativeAssetLiabilityMeasuredOnRecurringBasisUnobservableInputsReconciliationLossIncludedInEarnings

agr:FairValueNetDerivativeAssetLiabilityMeasuredOnRecurringBasisUnobservableInputsReconciliationLossIncludedInOtherComprehensiveIncomeLoss
us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName, us-gaap:DisposalGroupClassification
agr:GainLossOnDispositionOfBusinessNetOfTax
us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName, us-gaap:DisposalGroupClassification
agr:GainLossOnDispositionOfBusinessNetOfTaxRelatedToRemeasurementOfRetainedInvestment
dei:LegalEntity
agr:PercentageOfElectricLoadObligationsUsingContractsForNYISOLocation
dei:LegalEntity
agr:PercentageOfReturnOnEquity

agr:PreMergerCosts
dei:LegalEntity, us-gaap:DerivativeInstrumentRisk
agr:ProportionOfCostOrBenefitAllocatedToCustomersOnContract

agr:ProposedWindFarmAndElectricityTransmissionProjectCapacity

agr:ProposedWindFarmandElectricityTransmissionProjectCapacity

agr:PublicUtilitiesNoticeOfViolationCivilPenaltyAmount
us-gaap:SubsequentEventType

agr:SaleOfStockConsiderationReceivedOnTransactionUsedToRepayDebt

agr:ShowCauseOrderNumberOfAllegedViolationsWithCivilActionForInjunctiveRelief
us-gaap:LitigationCase
agr:SiteContingencyLossExposureNotAccruedBestEstimatePreTax

us-gaap:AccrualForEnvironmentalLossContingenciesChargesToExpenseForNewLosses

us-gaap:AllocatedShareBasedCompensationExpenseNetOfTax

us-gaap:AllowanceForDoubtfulAccountsReceivableWriteOffs
us-gaap:DerivativeInstrumentsGainLossByHedgingRelationship, us-gaap:StatementBusinessSegments
us-gaap:CashFlowHedgeGainLossToBeReclassifiedWithinTwelveMonths
us-gaap:SubsequentEventType
us-gaap:CommonStockDividendsPerShareDeclared

us-gaap:ContractWithCustomerLiabilityRevenueRecognized

us-gaap:DeferredIncomeTaxesAndTaxCredits
us-gaap:RetirementPlanType
us-gaap:DefinedBenefitPlanAmortizationOfGainsLosses
us-gaap:RetirementPlanType
us-gaap:DefinedBenefitPlanAmortizationOfPriorServiceCostCredit
us-gaap:RetirementPlanType
us-gaap:DefinedBenefitPlanExpectedReturnOnPlanAssets
us-gaap:RetirementPlanType
us-gaap:DefinedBenefitPlanInterestCost
us-gaap:RetirementPlanType
us-gaap:DefinedBenefitPlanNetPeriodicBenefitCost
us-gaap:RetirementPlanType
us-gaap:DefinedBenefitPlanServiceCost

us-gaap:DepreciationAndAmortization
us-gaap:DerivativeInstrumentRisk, us-gaap:IncomeStatementLocation, us-gaap:Position, us-gaap:StatementBusinessSegments, us-gaap:TransactionType
us-gaap:DerivativeGainLossOnDerivativeNet
us-gaap:DerivativeInstrumentRisk, us-gaap:IncomeStatementLocation, us-gaap:StatementBusinessSegments, us-gaap:TransactionType
us-gaap:IncomeStatementLocation, us-gaap:StatementBusinessSegments, us-gaap:TransactionType
us-gaap:StatementBusinessSegments, us-gaap:TransactionType
us-gaap:DerivativeInstrumentRisk, us-gaap:Position, us-gaap:StatementBusinessSegments
us-gaap:DerivativeNonmonetaryNotionalAmountEnergyMeasure
us-gaap:DerivativeInstrumentRisk, us-gaap:StatementBusinessSegments
us-gaap:DerivativeInstrumentRisk, us-gaap:Position, us-gaap:StatementBusinessSegments
us-gaap:DerivativeNonmonetaryNotionalAmountVolume

us-gaap:EquityMethodInvestmentDividendsOrDistributions

us-gaap:FairValueNetDerivativeAssetLiabilityMeasuredOnRecurringBasisChangeInUnrealizedGainLoss

us-gaap:FairValueNetDerivativeAssetLiabilityMeasuredOnRecurringBasisUnobservableInputsReconciliationGainLossIncludedInEarnings

us-gaap:FairValueNetDerivativeAssetLiabilityMeasuredOnRecurringBasisUnobservableInputsReconciliationGainLossIncludedInOtherComprehensiveIncomeLoss

us-gaap:FairValueNetDerivativeAssetLiabilityMeasuredOnRecurringBasisUnobservableInputsReconciliationPurchases

us-gaap:FairValueNetDerivativeAssetLiabilityMeasuredOnRecurringBasisUnobservableInputsReconciliationSettlements

us-gaap:FairValueNetDerivativeAssetLiabilityMeasuredOnRecurringBasisUnobservableInputsReconciliationTransfersOutOfLevel3

us-gaap:FinanceLeasePrincipalPayments
us-gaap:HedgingDesignation
us-gaap:ForeignCurrencyCashFlowHedgeGainLossReclassifiedToEarningsNet
us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName, us-gaap:DisposalGroupClassification
us-gaap:GainLossOnSaleOfBusiness

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

us-gaap:IncomeTaxCreditsAndAdjustments

us-gaap:IncreaseDecreaseInOtherCurrentAssets

us-gaap:IncreaseDecreaseInOtherCurrentLiabilities

us-gaap:IncreaseDecreaseInOtherNoncurrentAssets

us-gaap:IncreaseDecreaseInOtherNoncurrentLiabilities

us-gaap:LeaseIncome
us-gaap:StatementBusinessSegments
us-gaap:LitigationCase
us-gaap:LitigationSettlementAmountAwardedToOtherParty
us-gaap:StatementScenario, us-gaap:DerivativeInstrumentRisk, us-gaap:DerivativeInstrumentsGainLossByHedgingRelationship
us-gaap:LossOnDiscontinuationOfCashFlowHedgeDueToForecastedTransactionProbableOfNotOccurring
us-gaap:StatementScenario, us-gaap:DerivativeInstrumentsGainLossByHedgingRelationship, us-gaap:StatementBusinessSegments

us-gaap:NoncontrollingInterestIncreaseFromSubsidiaryEquityIssuance
us-gaap:StatementEquityComponents

us-gaap:OciEquityMethodInvestmentAfterTax
us-gaap:DerivativeInstrumentsGainLossByHedgingRelationship, us-gaap:StatementBusinessSegments
us-gaap:OtherComprehensiveIncomeLossBeforeReclassificationsBeforeTax

us-gaap:OtherComprehensiveIncomeLossCashFlowHedgeGainLossBeforeReclassificationAfterTax

us-gaap:OtherComprehensiveIncomeLossCashFlowHedgeGainLossBeforeReclassificationAndTax
us-gaap:DerivativeInstrumentRisk
us-gaap:DerivativeInstrumentRisk, us-gaap:IncomeStatementLocation, us-gaap:StatementBusinessSegments
us-gaap:DerivativeInstrumentRisk, us-gaap:StatementBusinessSegments
us-gaap:DerivativeInstrumentsGainLossByHedgingRelationship, us-gaap:StatementBusinessSegments
us-gaap:StatementBusinessSegments

us-gaap:OtherComprehensiveIncomeLossCashFlowHedgeGainLossBeforeReclassificationTax

us-gaap:OtherComprehensiveIncomeLossCashFlowHedgeGainLossReclassificationAfterTax

us-gaap:OtherComprehensiveIncomeLossCashFlowHedgeGainLossReclassificationBeforeTax
us-gaap:DerivativeInstrumentRisk, us-gaap:IncomeStatementLocation
us-gaap:DerivativeInstrumentRisk, us-gaap:IncomeStatementLocation, us-gaap:StatementBusinessSegments
us-gaap:StatementBusinessSegments

us-gaap:OtherComprehensiveIncomeLossCashFlowHedgeGainLossReclassificationTax

us-gaap:OtherComprehensiveIncomeLossTax

us-gaap:OtherNoncashIncomeExpense

us-gaap:PaymentsForProceedsFromOtherInvestingActivities

us-gaap:PaymentsOfStockIssuanceCosts

us-gaap:PaymentsToMinorityShareholders

us-gaap:PensionAndOtherPostretirementBenefitContributions

us-gaap:PensionExpense

us-gaap:ProceedsFromCollectionOfAdvanceToAffiliate

us-gaap:ProceedsFromContributionInAidOfConstruction

us-gaap:ProceedsFromEquityMethodInvestmentDividendsOrDistributionsReturnOfCapital

us-gaap:ProceedsFromMinorityShareholders

us-gaap:ProceedsFromOtherShortTermDebt

us-gaap:ProceedsFromSaleOfProductiveAssets

us-gaap:ProvisionForDoubtfulAccounts
us-gaap:TransactionType
dei:LegalEntity
us-gaap:PublicUtilitiesApprovedReturnOnEquityPercentage
us-gaap:PublicUtility
us-gaap:PublicUtilitiesRequestedEquityCapitalStructurePercentage
us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName, us-gaap:RelatedPartyTransactionsByRelatedParty
us-gaap:RelatedPartyTransactionAmountsOfTransaction
us-gaap:RelatedPartyTransactionsByRelatedParty
us-gaap:RelatedPartyTransactionPurchasesFromRelatedParty

us-gaap:RestructuringCharges

us-gaap:ResultsOfOperationsRevenueOther
us-gaap:ConsolidationItems
us-gaap:StatementBusinessSegments
us-gaap:RelatedPartyTransactionsByRelatedParty
us-gaap:RevenueFromRelatedParties

us-gaap:SaleOfStockConsiderationReceivedOnTransaction

us-gaap:SeveranceCosts1
us-gaap:IncomeStatementLocation

us-gaap:TreasuryStockValueAcquiredCostMethod
us-gaap:StatementEquityComponents
us-gaap:Range, us-gaap:TradingActivityByType
us-gaap:UnderlyingDerivative
us-gaap:BalanceSheetLocation
us-gaap:UnrealizedGainLossOnDerivatives
us-gaap:BalanceSheetLocation, us-gaap:DerivativeInstrumentRisk

us-gaap:UnrealizedGainLossOnDerivativesAndCommodityContracts

us-gaap:UtilitiesOperatingExpense

us-gaap:UtilitiesOperatingExpenseDepreciationAndAmortization
us-gaap:ConsolidationItems
us-gaap:ConsolidationItems, us-gaap:StatementBusinessSegments

us-gaap:UtilitiesOperatingExpenseMaintenanceAndOperations

us-gaap:UtilitiesOperatingExpensePurchasedPower
us-gaap:IncomeStatementLocation, us-gaap:StatementBusinessSegments, us-gaap:TransactionType

us-gaap:UtilitiesOperatingExpenseTaxes

agr:ACTransmissionPublicPolicyProjectTotalCost

agr:AccruedLiabilitiesForPropertyPlantAndEquipmentAdditions

agr:AccruedLiabilityForPropertyPlantAndEquipmentAdditions
dei:LegalEntity
agr:AdditionalMaximumAnnualCommitment

agr:AdvancesReceivedCurrent
us-gaap:BusinessAcquisition
agr:BusinessAcquisitionTerminationRightsTermTerminationFees
us-gaap:BusinessAcquisition
agr:BusinessAcquisitionTerminationRightsTermTerminationFeesAsRemedy

agr:DeferredTaxLiabilitiesAssetsNontaxableGrantRevenue

agr:DeferredTaxLiabilitiesCompensationAndBenefits

agr:DeferredTaxLiabilitiesUnfundedFutureIncomeTaxes
dei:LegalEntity
agr:DerivativeCollateralObligationToBePaidInDecreaseInCreditRatingBelowInvestmentGrade
us-gaap:DisposalGroupClassification, us-gaap:IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperations
agr:DisposalGroupNotDiscontinuedOperationPercentageOfOwnershipTransferred
us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName, us-gaap:DisposalGroupClassification
agr:DisposalGroupPercentageOfOwnershipInterestSold

agr:EnergyLegislationSettlementAgreementContributionAmount

agr:EnergyLegislationSettlementAgreementCustomersRateCreditsCollectedInRateAdjustmentMechanism

agr:EnergyLegislationSettlementAgreementCustomersRateCreditsProvided
us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName
agr:EquityMethodInvesteeEnterpriseValue
us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName, us-gaap:DisposalGroupClassification
agr:EquityMethodInvestmentEffectivePercentageOfEconomicBenefitsRetained
dei:LegalEntity
agr:EquityRatio
dei:LegalEntity
agr:EquityRatioForEarningsSharing
dei:LegalEntity, us-gaap:Range

agr:EquityRatioYearThree
us-gaap:RegulatoryAgency
dei:LegalEntity
agr:EquityRatioYearTwo
us-gaap:RegulatoryAgency

agr:EstimatedReductionInEarningsPerYearProvidedEffectiveOfSupplementalNoticeOfProposedRulemaking
us-gaap:DerivativeInstrumentsGainLossByHedgingRelationship, us-gaap:StatementBusinessSegments
agr:ExpectedAmortizationOfDiscontinuedCashFlowHedgesNextFiscalYear
us-gaap:DerivativeInstrumentRisk, us-gaap:DerivativeInstrumentsGainLossByHedgingRelationship
agr:ExpectedAmortizationOfDiscontinuedCashFlowHedgesRemainderOfFiscalYear
us-gaap:DerivativeInstrumentsGainLossByHedgingRelationship, us-gaap:StatementBusinessSegments

agr:FuturePaymentsCommitted
us-gaap:ConsolidatedEntities
agr:InterestAccruedSubsidiariesCurrent

agr:LiabilitiesOtherthanLongtermDebtandRegulatoryLiabilitiesNoncurrent

agr:LongTermDebtCurrentMaturitiesExcludingCurrentNotesPayable
dei:LegalEntity
agr:MaximumAmountOfCommitmentToPurchaseRenewableEnergyCreditsRecsFromNewFacilitiesBehindDistributionCustomerMeters
dei:LegalEntity
agr:MaximumAnnualCommitmentLevelObligationAfterYearSix

agr:OtherPledgedDeposits

agr:PrepaidOtherTaxes

agr:PriceOfPowerPurchaseAgreements

agr:PropertyPlantAndEquipmentInServiceGross
us-gaap:PropertyPlantAndEquipmentByType
us-gaap:PropertyPlantAndEquipmentByType, us-gaap:PublicUtilityRegulatedOrUnregulatedStatus
us-gaap:PublicUtilityRegulatedOrUnregulatedStatus

agr:PropertyPlantAndEquipmentInServiceNet
us-gaap:PublicUtilityRegulatedOrUnregulatedStatus
dei:LegalEntity
agr:RecoveryOfDeferredStormCostsOverFiveYear
dei:LegalEntity
agr:RecoveryOfDeferredStormCostsOverTenYear

agr:RegulatoryAssetsNoncurrentIncludingDeferredIncomeTaxesRegulatory

agr:StandbyLettersOfCreditSuretyBondsGuaranteesAndIndemnificationsOutstanding
us-gaap:CounterpartyName

agr:TaxCutsAndJobsActOf2017DeferredTaxLiabilitiesAssetsRemeasurement

us-gaap:AccountsPayableRelatedPartiesCurrent
us-gaap:ConsolidatedEntities

us-gaap:AccountsReceivableGross

us-gaap:AccountsReceivableGrossCurrent
us-gaap:AccountsNotesLoansAndFinancingReceivableByReceivableType
us-gaap:AccountsReceivableNet
us-gaap:TransactionType

us-gaap:AccountsReceivableRelatedPartiesCurrent
us-gaap:ConsolidatedEntities

us-gaap:AccrualForEnvironmentalLossContingencies
dei:LegalEntity
dei:LegalEntity, us-gaap:EnvironmentalRemediationSite
us-gaap:Range, us-gaap:EnvironmentalRemediationSite
us-gaap:StatementGeographical, us-gaap:EnvironmentalRemediationSite

us-gaap:AccruedEnvironmentalLossContingenciesNoncurrent

us-gaap:AccruedSalariesCurrent
us-gaap:DerivativeInstrumentRisk, us-gaap:DerivativeInstrumentsGainLossByHedgingRelationship
us-gaap:AccumulatedOtherComprehensiveIncomeLossBeforeTax1
us-gaap:DerivativeInstrumentRisk, us-gaap:DerivativeInstrumentsGainLossByHedgingRelationship, us-gaap:StatementBusinessSegments

us-gaap:AdditionalCollateralAggregateFairValue

us-gaap:AllowanceForDoubtfulAccountsReceivable
us-gaap:TransactionType

us-gaap:AllowanceForDoubtfulAccountsReceivableCurrent

us-gaap:AmountOfRestrictedNetAssetsForConsolidatedAndUnconsolidatedSubsidiaries
dei:LegalEntity
us-gaap:AreaOfLand

us-gaap:AssetRetirementObligation

us-gaap:AssetRetirementObligationLegallyRestrictedAssetsFairValue

us-gaap:AssetRetirementObligationsNoncurrent
us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FinancialInstrument
us-gaap:AssetsFairValueDisclosure
us-gaap:FinancialInstrument

us-gaap:AssetsNoncurrentOtherThanNoncurrentInvestmentsAndPropertyPlantAndEquipment
us-gaap:DisposalGroupClassification, us-gaap:IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperations
us-gaap:AssetsOfDisposalGroupIncludingDiscontinuedOperation
us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName, us-gaap:RelatedPartyTransactionsByRelatedParty
us-gaap:BusinessAcquisitionPercentageOfVotingInterestsAcquired

us-gaap:CollateralAlreadyPostedAggregateFairValue

us-gaap:CommercialPaper

us-gaap:ContractWithCustomerAssetNetNoncurrent

us-gaap:ContractWithCustomerLiabilityNoncurrent
us-gaap:LongtermDebtType
us-gaap:DebtInstrumentCarryingAmount
us-gaap:LongtermDebtType
us-gaap:DebtInstrumentCollateralAmount
dei:LegalEntity, us-gaap:LongtermDebtType
us-gaap:DebtInstrumentFaceAmount

us-gaap:DebtInstrumentFairValue

us-gaap:DebtInstrumentUnamortizedDiscountPremiumAndDebtIssuanceCostsNet
us-gaap:ShortTermDebtType
us-gaap:DebtWeightedAverageInterestRate
us-gaap:AwardType
us-gaap:DeferredCompensationSharebasedArrangementsLiabilityCurrentAndNoncurrent

us-gaap:DeferredCreditsAndOtherLiabilities
us-gaap:MajorCustomers

us-gaap:DeferredFuelCost
us-gaap:ConsolidatedEntities
us-gaap:DeferredIncomeTaxAssetsNet

us-gaap:DeferredIncomeTaxLiabilities

us-gaap:DeferredTaxAssetsOperatingLossCarryforwards

us-gaap:DeferredTaxAssetsOther

us-gaap:DeferredTaxAssetsTaxCreditCarryforwards

us-gaap:DeferredTaxLiabilitiesInvestmentInNoncontrolledAffiliates

us-gaap:DeferredTaxLiabilitiesPropertyPlantAndEquipment
us-gaap:RetirementPlanType
us-gaap:DefinedBenefitPlanAccumulatedOtherComprehensiveIncomeNetGainsLossesAfterTax
us-gaap:RetirementPlanType
us-gaap:DefinedBenefitPlanAccumulatedOtherComprehensiveIncomeNetPriorServiceCostCreditAfterTax
dei:LegalEntity, us-gaap:RetirementPlanType
us-gaap:DefinedBenefitPlanAssumptionsUsedCalculatingBenefitObligationDiscountRate
dei:LegalEntity, 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:DefinedBenefitPlanExpectedFutureBenefitPaymentsRemainderOfFiscalYear
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:RetirementPlanType
us-gaap:DefinedBenefitPlanExpectedFutureEmployerContributionsNextFiscalYear
us-gaap:RetirementPlanType
us-gaap:DefinedBenefitPlanFundedStatusOfPlan
dei:LegalEntity, us-gaap:Range
us-gaap:DefinedBenefitPlanHealthCareCostTrendRateAssumedNextFiscalYear

us-gaap:DefinedBenefitPlanPensionPlanWithProjectedBenefitObligationInExcessOfPlanAssetsPlanAssets

us-gaap:DefinedBenefitPlanPensionPlanWithProjectedBenefitObligationInExcessOfPlanAssetsProjectedBenefitObligation

us-gaap:DefinedBenefitPlanPensionPlansWithAccumulatedBenefitObligationsInExcessOfPlanAssetsAggregateAccumulatedBenefitObligation

us-gaap:DefinedBenefitPlanPensionPlansWithAccumulatedBenefitObligationsInExcessOfPlanAssetsAggregateFairValueOfPlanAssets
dei:LegalEntity, us-gaap:DefinedBenefitPlanByPlanAssetCategories, us-gaap:RetirementPlanType
us-gaap:DefinedBenefitPlanPlanAssetsTargetAllocationPercentage
dei:LegalEntity, us-gaap:Range, us-gaap:DefinedBenefitPlanByPlanAssetCategories, us-gaap:RetirementPlanType
us-gaap:DefinedBenefitPlanByPlanAssetCategories, us-gaap:RetirementPlanType
dei:LegalEntity
us-gaap:DefinedBenefitPlanUltimateHealthCareCostTrendRate1
us-gaap:RelatedPartyTransactionsByRelatedParty
us-gaap:Deposits

us-gaap:DepositsReceivedForSecuritiesLoanedAtCarryingValue
us-gaap:BalanceSheetLocation, us-gaap:DerivativeInstrumentRisk
us-gaap:DerivativeAmountOfHedgedItem

us-gaap:DerivativeAssetCollateralObligationToReturnCashOffset
us-gaap:FinancialInstrument
us-gaap:DerivativeInstrumentRisk, us-gaap:FairValueByFairValueHierarchyLevel
us-gaap:DerivativeAssetFairValueGrossAssetIncludingNotSubjectToMasterNettingArrangement
us-gaap:FairValueByFairValueHierarchyLevel

us-gaap:DerivativeAssetFairValueGrossLiabilityAndObligationToReturnCashOffset
us-gaap:DerivativeInstrumentRisk
us-gaap:Range, us-gaap:DerivativeInstrumentRisk, us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:MeasurementInputType
us-gaap:DerivativeAssetLiabilityNetMeasurementInput
us-gaap:Range, us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FinancialInstrument, us-gaap:MeasurementInputType
us-gaap:Range, us-gaap:MeasurementInputType, us-gaap:TradingActivityByType

us-gaap:DerivativeAssets
us-gaap:BalanceSheetLocation, us-gaap:HedgingDesignation, us-gaap:StatementBusinessSegments
us-gaap:DerivativeInstrumentRisk
us-gaap:DerivativeInstrumentRisk, us-gaap:FinancialInstrument
us-gaap:FairValueByFairValueHierarchyLevel
us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FinancialInstrument
us-gaap:FinancialInstrument

us-gaap:DerivativeAssetsCurrent
us-gaap:DerivativeInstrumentRisk, us-gaap:Position, us-gaap:StatementBusinessSegments
us-gaap:DerivativeAssetsLiabilitiesAtFairValueNet
us-gaap:DerivativeInstrumentRisk, us-gaap:StatementBusinessSegments
us-gaap:StatementBusinessSegments

us-gaap:DerivativeAssetsNoncurrent

us-gaap:DerivativeCollateralObligationToReturnCash
us-gaap:BalanceSheetLocation, us-gaap:StatementBusinessSegments
us-gaap:BalanceSheetLocation, us-gaap:StatementBusinessSegments
us-gaap:DerivativeCollateralRightToReclaimCash
us-gaap:BalanceSheetLocation, us-gaap:HedgingDesignation, us-gaap:StatementBusinessSegments
us-gaap:DerivativeFairValueOfDerivativeAsset
us-gaap:FairValueByFairValueHierarchyLevel
us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FinancialInstrument
us-gaap:BalanceSheetLocation, us-gaap:StatementBusinessSegments
us-gaap:DerivativeFairValueOfDerivativeAssetAmountNotOffsetAgainstCollateral
us-gaap:BalanceSheetLocation, us-gaap:StatementBusinessSegments
us-gaap:DerivativeFairValueOfDerivativeAssetAmountOffsetAgainstCollateral

us-gaap:DerivativeFairValueOfDerivativeLiability
dei:LegalEntity, us-gaap:DerivativeInstrumentRisk
us-gaap:BalanceSheetLocation, us-gaap:HedgingDesignation, us-gaap:StatementBusinessSegments
us-gaap:FairValueByFairValueHierarchyLevel
us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FinancialInstrument
us-gaap:BalanceSheetLocation, us-gaap:StatementBusinessSegments
us-gaap:DerivativeFairValueOfDerivativeLiabilityAmountNotOffsetAgainstCollateral
us-gaap:BalanceSheetLocation, us-gaap:StatementBusinessSegments
us-gaap:DerivativeFairValueOfDerivativeLiabilityAmountOffsetAgainstCollateral

us-gaap:DerivativeLiabilities
us-gaap:BalanceSheetLocation, us-gaap:HedgingDesignation, us-gaap:StatementBusinessSegments
us-gaap:DerivativeInstrumentRisk
us-gaap:DerivativeInstrumentRisk, us-gaap:DerivativeInstrumentsGainLossByHedgingRelationship, us-gaap:StatementBusinessSegments
us-gaap:DerivativeInstrumentRisk, us-gaap:DerivativeInstrumentsGainLossByHedgingRelationship, us-gaap:SubsequentEventType
us-gaap:DerivativeInstrumentRisk, us-gaap:FinancialInstrument
us-gaap:FairValueByFairValueHierarchyLevel
us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FinancialInstrument
us-gaap:FinancialInstrument

us-gaap:DerivativeLiabilitiesCurrent

us-gaap:DerivativeLiabilitiesNoncurrent

us-gaap:DerivativeLiabilityCollateralRightToReclaimCashOffset
us-gaap:FinancialInstrument

us-gaap:DerivativeLiabilityFairValueGrossAssetAndRightToReclaimCashOffset
us-gaap:DerivativeInstrumentRisk
us-gaap:DerivativeInstrumentRisk, us-gaap:FairValueByFairValueHierarchyLevel
us-gaap:DerivativeLiabilityFairValueGrossLiabilityIncludingNotSubjectToMasterNettingArrangement
us-gaap:FairValueByFairValueHierarchyLevel
us-gaap:DerivativeInstrumentRisk, us-gaap:Position, us-gaap:StatementBusinessSegments
us-gaap:DerivativeNonmonetaryNotionalAmount
us-gaap:DerivativeInstrumentRisk, us-gaap:StatementBusinessSegments
us-gaap:DerivativeInstrumentRisk, us-gaap:DerivativeInstrumentsGainLossByHedgingRelationship, us-gaap:StatementBusinessSegments
us-gaap:DerivativeNotionalAmount
us-gaap:DisposalGroupClassification, us-gaap:IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperations
us-gaap:DisposalGroupIncludingDiscontinuedOperationConsideration
us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName, us-gaap:DisposalGroupClassification

us-gaap:DueFromRelatedParties
us-gaap:RelatedPartyTransactionsByRelatedParty
us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName

us-gaap:DueToAffiliateCurrent
us-gaap:ConsolidatedEntities
us-gaap:DueToAffiliateNoncurrent
us-gaap:RelatedPartyTransactionsByRelatedParty
us-gaap:DueToRelatedPartiesCurrentAndNoncurrent

us-gaap:EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedShareBasedAwardsOtherThanOptions
us-gaap:EnvironmentalRemediationSite
us-gaap:EnvironmentalExitCostsCostsAccruedToDate
us-gaap:Range, us-gaap:EnvironmentalRemediationSite
dei:LegalEntity, us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName
us-gaap:EquityMethodInvestmentOwnershipPercentage
us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName
us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName, us-gaap:StatementBusinessSegments

us-gaap:EquityMethodInvestments
us-gaap:ConsolidationItems, us-gaap:StatementBusinessSegments
us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName

us-gaap:FairValueNetDerivativeAssetLiabilityMeasuredOnRecurringBasisWithUnobservableInputs

us-gaap:FinanceLeaseLiability
us-gaap:StatementBusinessSegments

us-gaap:FinanceLeaseLiabilityCurrent

us-gaap:FinanceLeaseLiabilityNoncurrent

us-gaap:FinanceLeaseLiabilityPaymentsDue

us-gaap:FinanceLeaseLiabilityPaymentsDueAfterYearFive

us-gaap:FinanceLeaseLiabilityPaymentsDueNextTwelveMonths

us-gaap:FinanceLeaseLiabilityPaymentsDueYearFive

us-gaap:FinanceLeaseLiabilityPaymentsDueYearFour

us-gaap:FinanceLeaseLiabilityPaymentsDueYearThree

us-gaap:FinanceLeaseLiabilityPaymentsDueYearTwo

us-gaap:FinanceLeaseLiabilityUndiscountedExcessAmount

us-gaap:FinanceLeaseRightOfUseAsset

us-gaap:FinanceLeaseWeightedAverageDiscountRatePercent

us-gaap:FiniteLivedIntangibleAssetsAccumulatedAmortization
us-gaap:FiniteLivedIntangibleAssetsByMajorClass

us-gaap:FiniteLivedIntangibleAssetsAmortizationExpenseNextTwelveMonths

us-gaap:FiniteLivedIntangibleAssetsAmortizationExpenseYearFive

us-gaap:FiniteLivedIntangibleAssetsAmortizationExpenseYearFour

us-gaap:FiniteLivedIntangibleAssetsAmortizationExpenseYearThree

us-gaap:FiniteLivedIntangibleAssetsAmortizationExpenseYearTwo

us-gaap:FiniteLivedIntangibleAssetsGross
us-gaap:FiniteLivedIntangibleAssetsByMajorClass

us-gaap:InterestPayableCurrent
us-gaap:ConsolidatedEntities
us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FinancialInstrument
us-gaap:InvestmentsFairValueDisclosure
us-gaap:FinancialInstrument

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueNextTwelveMonths

us-gaap:LettersOfCreditOutstandingAmount
us-gaap:LongtermDebtType
us-gaap:LineOfCreditFacilityRemainingBorrowingCapacity

us-gaap:LongTermDebtAndCapitalLeaseObligationsCurrent

us-gaap:LongTermDebtAndCapitalLeaseObligationsIncludingCurrentMaturities

us-gaap:LongTermDebtFairValue

us-gaap:LongTermDebtMaturitiesRepaymentsOfPrincipalInNextTwelveMonths

us-gaap:LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFive

us-gaap:LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFour

us-gaap:LongTermDebtMaturitiesRepaymentsOfPrincipalInYearThree

us-gaap:LongTermDebtMaturitiesRepaymentsOfPrincipalInYearTwo

us-gaap:MarginDepositAssets
dei:LegalEntity, us-gaap:Ownership
us-gaap:MinorityInterestOwnershipPercentageByNoncontrollingOwners
dei:LegalEntity, us-gaap:Ownership
us-gaap:MinorityInterestOwnershipPercentageByParent
us-gaap:ConsolidatedEntities, us-gaap:Ownership
us-gaap:Ownership

us-gaap:NotesPayable
us-gaap:LongtermDebtType
us-gaap:ConsolidatedEntities
us-gaap:NotesPayableRelatedPartiesClassifiedCurrent
us-gaap:RelatedPartyTransactionsByRelatedParty
us-gaap:NotesPayableRelatedPartiesCurrentAndNoncurrent
us-gaap:ConsolidatedEntities
us-gaap:NotesReceivableRelatedPartiesCurrent

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

us-gaap:OperatingLossCarryforwardsValuationAllowance
us-gaap:IncomeTaxAuthority

us-gaap:OtherLongTermInvestments

us-gaap:OtherSundryLiabilitiesCurrent

us-gaap:OtherSundryLiabilitiesNoncurrent

us-gaap:PensionAndOtherPostretirementAndPostemploymentBenefitPlansLiabilitiesNoncurrent
us-gaap:RetirementPlanTaxStatus
us-gaap:PensionAndOtherPostretirementDefinedBenefitPlansLiabilitiesCurrentAndNoncurrent
us-gaap:RetirementPlanType

us-gaap:PrepaidExpenseCurrent

us-gaap:PrepaidTaxes

us-gaap:ProvisionForLossOnContracts

us-gaap:PublicUtilitiesInventory

us-gaap:PurchaseObligation

us-gaap:PurchaseObligationDueAfterFifthYear

us-gaap:PurchaseObligationDueInFifthYear

us-gaap:PurchaseObligationDueInFourthYear

us-gaap:PurchaseObligationDueInNextTwelveMonths

us-gaap:PurchaseObligationDueInSecondYear

us-gaap:PurchaseObligationDueInThirdYear

us-gaap:ReceivablesLongTermContractsOrPrograms

us-gaap:RegulatoryAssets
dei:LegalEntity, us-gaap:DerivativeInstrumentRisk
us-gaap:RegulatoryAsset

us-gaap:RegulatoryAssetsCurrent

us-gaap:RegulatoryAssetsNoncurrent

us-gaap:RegulatoryLiabilities
us-gaap:RegulatoryLiability

us-gaap:RegulatoryLiabilityCurrent

us-gaap:RegulatoryLiabilityNoncurrent
us-gaap:LitigationCase

us-gaap:RemainingAmountsOfRegulatoryAssetsForWhichNoReturnOnInvestmentDuringRecoveryPeriodIsProvided

us-gaap:RestrictedCashNoncurrent

us-gaap:RestructuringReserve
us-gaap:RestructuringCostAndReserve

us-gaap:RevenueRemainingPerformanceObligation
us-gaap:ContractWithCustomerSalesChannel

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue
us-gaap:AwardType
us-gaap:TitleOfIndividual, us-gaap:AwardType

us-gaap:ShortTermBankLoansAndNotesPayable
us-gaap:ConsolidatedEntities
us-gaap:IncomeTaxAuthority
us-gaap:TaxCreditCarryforwardAmount
us-gaap:IncomeTaxAuthority, us-gaap:TaxCreditCarryforward
us-gaap:IncomeTaxAuthority
us-gaap:TaxCreditCarryforwardValuationAllowance

us-gaap:TreasuryStockCommonValue
us-gaap:ConsolidatedEntities

us-gaap:UnbilledContractsReceivable

us-gaap:UnrecognizedTaxBenefitsThatWouldImpactEffectiveTaxRate

Plots across concepts


IncomeStatement
Other Comprehensive Income Loss Net Of Tax
Expenses
Income Tax Expense Benefit
Balance Sheet
Operating Lease Liability
Assets
Derivative Assets
Current Assets
Other Assets Current
NonCurrent Assets
Operating Lease Right Of Use Asset
PropertyPlantAndEquipmentNet
Accumulated Depreciation Depletion And Amortization Property Plant And Equipment
Liabilities
Operating Lease Liability
Current Liabilities
Contract With Customer Liability Current
Noncurrent Liabilities
Operating Lease Liability Noncurrent
Stockholders Equity
Accumulated Other Comprehensive Income Loss Net Of Tax
CashFlow
Net Cash Provided By Used In Investing Activities
NetCashProvidedByUsedInOperatingActivities
Net Income Loss
NetCashProvidedByUsedInInvestingActivities
Net Cash Provided By Used In Investing Activities
NetCashProvidedByUsedInFinancingActivities
Payments For Repurchase Of Common Stock
Shares
Weighted Average Number Of Shares Outstanding Basic
DividendsAndRepurchase
Payments For Repurchase Of Common Stock
OperatingLeaseLiability
Operating Lease Liability Current
LesseeOperatingLeaseLiabilityPaymentsDue
Lessee Operating Lease Liability Payments Due Year Four
FiniteLivedIntangibleAssets
Finite Lived Intangible Assets Net
AccountsReceivable
Allowance For Doubtful Accounts Receivable Current

Tables

  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-31
us-gaap:CommonStockValue ███████████████████████▁3.03.03.03.03.03.03.03.03.03.03.03.03.03.03.03.03.03.03.03.03.03.03.00.0NANA0.0NANANA
us-gaap:WeightedAverageNumberOfDilutedSharesOutstanding █▁347.419064309.736266NA309.550126309.547451309.623573NA309.517778309.512752309.712308NA309.68989309.719584309.793064NA309.801903309.826185309.837442NA309.999846309.683965309.808006NA252.235232252.235232252.235232NANANANA
us-gaap:WeightedAverageNumberOfSharesOutstandingBasic █▁347.121197309.49525NA309.491082309.506595309.491082NA309.491082309.491082309.491082NA309.491082309.517854309.51364NA309.491082309.520718309.508889NA309.495141309.527868309.538215NA252.235232252.235232252.235232NANANANA
us-gaap:EarningsPerShareBasic ▄█▅▄▄▆▆▅▄▆▄▄▄▆▁▄▄▆▆▄▄▆▄▃▃▅0.281.080.53999999999999980.280.280.780.71999999999999980.480.360.70.37999999999999990.40.350.79-0.250.320.390.770.67999999999999990.350.330.690.370.220.040.42NANANANA
us-gaap:EarningsPerShareDiluted ▄█▅▄▄▆▆▅▄▆▄▄▄▆▁▄▄▆▆▄▄▆▄▃▃▅0.281.080.53999999999999980.280.280.780.71999999999999980.480.360.70.37999999999999990.40.340.79-0.250.320.390.770.67999999999999990.350.330.690.370.220.040.42NANANANA
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-31
 Operating Margin us-gaap:ConsolidationItems agr:CorporateAndEliminations1.0NANA1.0NANANA1.01.0NANANANANANANANANANANANANANANANANANANANANA
 Operating Margin us-gaap:ConsolidationItems,us-gaap:StatementBusinessSegments us-gaap:OperatingSegments,agr:NetworksSegment▃█▅▂▁▆▄▂▁█▆▃▁▇▄▁1218.01573.01412.01194.01120.01461.01333.01139.01092.01600.01420.01232.01103.01549.01299.01126.0NANANANANANANANANANANANANANA
 Operating Margin us-gaap:ConsolidationItems,us-gaap:StatementBusinessSegments us-gaap:OperatingSegments,agr:RenewablesSegment▂█▂▃▂▅▃▆▄▁▁▄▄▃▁▁258.0393.0257.0275.0272.0328.0290.0347.0307.0242.0243.0315.0296.0283.0249.0241.0NANANANANANANANANANANANANANA
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-31
 TTM Greenblatt ROC _ _▆█▆▆▆▇▆▇▆▇▇▇▆█▁▆▆█▇▆▇█▅▆▅▆▆131.0406.0222.0165.0155.0327.0216.0239.0207.0341.0249.0253.0222.0403.0-425.0189.0223.0398.0306.0217.0322.0349.083.0161.073.0196.0186.0NANANA
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-31
us-gaap:ComprehensiveIncomeNetOfTax ▃█▅▄▄▆▆▅▄▆▄▅▄▇▁▄▄▇▆▄▄▆▅▄▃▄▄26.0308.0169.081.096.0219.0227.0160.0112.0190.0102.0131.0103.0234.0-69.0107.0119.0264.0205.0119.080.0192.0123.071.013.0107.093.0NANANA
us-gaap:ComprehensiveIncomeNetOfTaxAttributableToNoncontrollingInterest ▁▁▁▃▂▂▃▂▄▅▄█▆▃▅▆-14.0-13.0-14.0-6.0-12.0-10.0-7.0-11.0-5.0-1.0-3.09.03.0-6.00.01.0NANANANANANANANANANANANANANA
us-gaap:ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest ▃█▅▄▄▆▇▅▄▆▄▅▄▇▁▄▅▇▆▅▄▆▅▄▃▄12.0295.0155.075.084.0209.0220.0149.0107.0189.099.0140.0106.0228.0-69.0108.0119.0264.0205.0119.080.0192.0123.071.013.0107.0NANANANA
 us-gaap:DisposalGroupNotDiscontinuedOperationGainLossOnDisposal us-gaap:DisposalGroupClassification,us-gaap:IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperations us-gaap:DisposalGroupDisposedOfBySaleNotDiscontinuedOperations,agr:SolarProjectsInNevadaNANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest ▆█▇▆▆▇▇▇▆▇▆▇▆█▁▆▇█▇▇▇█▅▆▅▆▆▆94.0335.0160.096.070.0242.0256.0172.0134.0257.0158.0163.0137.0310.0-515.0132.0164.0342.0257.0162.0274.0316.027.0110.016.0148.0135.0102.0NANA
us-gaap:IncomeTaxExpenseBenefit ▆▆▆▆▆▆▆▆▆▆▇▆▆▇▁▆▇▇▇▇█▇▅▇▆▇▆▆10.014.08.015.0-6.012.040.033.029.041.042.029.027.072.0-438.032.044.0103.050.053.0172.0104.0-69.056.05.042.038.038.0NANA
us-gaap:IncomeTaxesPaidNet ▆▇▇▇▆▇▆▆▆▇▆▇▇▁▇▆█▇▆▇▇█▅▇▇█▅1.04.04.02.00.02.0-2.01.01.02.0-2.02.04.0-17.04.01.05.03.00.02.02.05.0-3.02.02.06.0-3.0NANANA
us-gaap:InterestExpense ▅▅▃▇█▅▆▄▅▆▇▅▄▅▄▄▄▄▁▂▄▇▅▃▃▂▃▂75.073.065.086.089.076.080.072.076.078.084.075.070.074.070.071.068.071.056.060.068.084.076.064.066.061.065.061.0NANA
us-gaap:InterestPaidNet █▄▆▅▇▆▇▅▆▅▅▄▅▄▅▄▄▄▄▆▅▅▁▃▃▃▂92.051.072.058.078.070.083.058.067.058.065.046.064.049.058.045.054.045.047.068.057.057.017.039.042.034.027.0NANANA
us-gaap:NetIncomeLoss ▄█▅▄▄▆▆▅▄▆▄▄▄▆▁▄▄▆▆▄▄▆▄▃▂▄▄▃▃▆98.0334.0166.087.088.0240.0223.0150.0110.0217.0119.0125.0107.0244.0-77.099.0120.0239.0207.0109.0102.0212.096.054.011.0106.097.064.063.0200.0
us-gaap:NetIncomeLossAttributableToNoncontrollingInterest ▁▁▁▃▂▂▃▂▄▅▄█▆▃▅▆-14.0-13.0-14.0-6.0-12.0-10.0-7.0-11.0-5.0-1.0-3.09.03.0-6.00.01.0NANANANANANANA0.0NANANA0.0NANA
us-gaap:OperatingIncomeLoss ▆█▆▆▆▇▆▇▆▇▇▇▆█▁▆▆█▇▆▇▇▅▆▅▆▆▆▆█131.0406.0222.0165.0155.0327.0216.0239.0207.0341.0249.0253.0222.0403.0-425.0189.0223.0398.0306.0217.0322.0349.083.0161.073.0196.0186.0153.0132.0414.0
us-gaap:OtherComprehensiveIncomeLossNetOfTax ▁▄▆▆▇▅▆▇▆▄▅▇▆▅▇▇▆█▆▇▅▅█▇▆▆▆▆-72.0-26.03.0-6.08.0-21.04.010.02.0-27.0-17.06.0-4.0-10.08.08.0-1.025.0-2.010.0-22.0-20.027.017.02.01.0-4.01.0NANA
 us-gaap:OtherComprehensiveIncomeLossNetOfTax us-gaap:StatementEquityComponents agr:AccumulatedNetGainLossfromCashFlowHedgesAttributabletoParentReclassificationtoNetIncomeGainLossesonCashFlowHedges▄▃▄▄▃▃▄▄▃▃▁▃▃▄█▃4.01.07.09.01.02.03.05.01.0-2.0-17.0-1.00.010.039.0-3.0NANANANANANANANANANANANANANA
 us-gaap:OtherComprehensiveIncomeLossNetOfTax us-gaap:StatementEquityComponents agr:AccumulatedNetGainLossfromCashFlowHedgesAttributabletoParentUnrealizedGainLossesonDerivativesQualifyingasCashFlowHedges▁▅█▆█▅▇█▇▅▅█-73.0-27.09.0-15.07.0-23.00.05.02.0-29.0-21.05.0NANA18.05.0NANANANANANANANANANANANANANA
 us-gaap:OtherComprehensiveIncomeLossNetOfTax us-gaap:StatementEquityComponents agr:UnrealizedGainLossFromEquityMethodInvestmentAttributableToParent-3.0NANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
 us-gaap:OtherComprehensiveIncomeLossNetOfTax us-gaap:StatementEquityComponents us-gaap:AccumulatedGainLossNetCashFlowHedgeParentNANANA-6.08.0-21.03.010.03.0-27.0NANANANANANANANANANANANANANANANANANANANA
 us-gaap:OtherComprehensiveIncomeLossNetOfTax us-gaap:StatementEquityComponents us-gaap:AccumulatedNetGainLossFromDesignatedOrQualifyingCashFlowHedges▁█-69.0-26.0NANA8.0-21.03.010.03.0-27.0-20.06.0-5.0-10.07.08.0NANANANANANANANANANANANANANA
 us-gaap:OtherComprehensiveIncomeLossNetOfTax us-gaap:StatementEquityComponents us-gaap:AccumulatedOtherComprehensiveIncome▁▄▆▆▇▅▆▇▆▄▅▇▆▅▇▇▆█▆▇▅▅█▇▆▆▆-72.0-26.03.0-6.08.0-21.04.010.02.0-27.0-17.06.0-4.0-10.08.08.0-1.025.0-2.010.0-22.0-20.027.017.02.01.0-4.0NANANA
 us-gaap:OtherComprehensiveIncomeLossNetOfTax us-gaap:StatementEquityComponents us-gaap:Parent▁▄▆▆▇▅▆▇▆▄▅▇▆▅▇▇▆█▆▇▅▅█▇▆▆-72.0-26.03.0-6.08.0-21.04.010.02.0-27.0-17.06.0-4.0-10.08.08.0-1.025.0-2.010.0-22.0-20.027.017.02.01.0NANANANA
us-gaap:OtherNonoperatingIncomeExpense ▇▄▁▅▄▄▃▅▄▄▃▃▃▂▆▅▅▅▄▄▆█▅▅▅▅▄▆34.01.0-39.016.02.0-3.0-18.06.02.0-7.0-9.0-16.0-20.0-21.023.014.08.013.04.03.020.049.017.016.010.012.02.019.0NANA
us-gaap:ProfitLoss ▄█▅▄▄▆▆▅▄▆▄▅▄▇▁▄▄▇▆▄▄▆▄▃▃▄▄▃▃▆84.0321.0152.081.076.0230.0216.0139.0105.0216.0116.0134.0110.0238.0-77.0100.0120.0239.0207.0109.0102.0212.096.054.011.0106.097.064.062.0201.0
us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax ▅█▆▄▄▆▆▄▄▇▆▄▃▆▅▄▄▇▅▄▅▆▃▂▁▃▂▁▁▅1489.01935.01590.01405.01345.01652.01609.01372.01322.01767.01665.01395.01249.01702.01533.01341.01331.01758.01491.01418.01439.01670.01153.01048.0939.01227.01118.0982.0938.01556.0
us-gaap:Revenues ▅█▆▅▄▇▆▅▄▇▆▅▄▇▅▄▄▇▅▄▄▆▂▂▁▃▂▁▁▅1477.01966.01669.01470.01392.01789.01609.01487.01400.01842.01665.01546.01402.01865.01533.01341.01331.01758.01491.01418.01439.01670.01153.01048.0939.01227.01118.0982.0938.01556.0
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-31
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-31
us-gaap:Assets ███▇▆▆▆▅▅▅▅▅▄▄▅▅▄▄▄▄▄▄▄▁38650.037768.037823.035640.034856.034593.034416.033547.033141.032608.032167.031755.031376.031483.031671.031921.031485.031396.031309.030609.030411.030539.030743.024397.0NA30743.024252.024252.0NANA
us-gaap:Liabilities ▆██▆▆▆▆▅▅▅▄▄▄▄▄▄▄▄▄▄▃▄▄▁18815.021776.021997.019786.018940.018685.018830.018029.017592.017152.016764.016300.015908.016164.016575.016704.016244.016144.016187.015558.015346.015415.015677.011750.0NANA11796.0NANANA
us-gaap:LiabilitiesAndStockholdersEquity ███▇▆▆▆▅▅▅▅▅▄▄▅▅▄▄▄▄▄▄▄▁38650.037768.037823.035640.034856.034593.034416.033547.033141.032608.032167.031755.031376.031483.031671.031921.031485.031396.031309.030609.030411.030539.030743.024397.0NANA24252.0NANANA
us-gaap:StockholdersEquity █▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▁19239.015381.015209.015223.015278.015326.015237.015150.015135.015158.015104.015128.015135.015171.015077.015202.015227.015239.015109.015038.015052.015111.015053.012631.0NANA12440.0NANANA
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-31
us-gaap:AssetsCurrent █▆█▂▁▂▂▂▁▂▂▂▁▂▃▂▂▂▃▃▃▃▄▄3670.03239.03777.01923.01713.01896.02025.01880.01803.01998.01963.01963.01700.01981.02260.02021.01932.02098.02252.02153.02235.02323.02474.02706.0NANA2299.0NANANA
us-gaap:CashAndCashEquivalentsAtCarryingValue █▄▇▁▁▁▂▁▂▁▁▁▁▁▁▁▁▁▁▂▃▃▃▅▅▄▃▃1729.0813.01463.0101.046.026.0178.0103.0166.033.036.032.052.040.041.027.036.030.091.0182.0396.0403.0427.01050.0985.0655.0482.0523.0NANA
us-gaap:CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents █▄▇▁▁▁▂▁▂▁▁▁▁▁▁▁▁1733.0817.01467.0106.051.032.0184.0108.0172.038.043.040.057.045.046.034.042.0NA96.0NANANA434.0NANANANANANANA
us-gaap:ShortTermInvestments NANA300.0NANANANANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:AccountsReceivableNetCurrent ▆█▇▅▄▅▅▄▅█▆▅▄▆▅▄▄▆▆▄▃▄▄▁1094.01283.01187.01021.0969.01077.01082.0966.01009.01264.01142.01060.0986.01113.01040.0943.0984.01117.01119.0956.0894.0964.0974.0723.0NANA841.0NANANA
us-gaap:OtherAssetsCurrent NANA17.0NANANA6.0NANANA6.0NANANA3.0NANANA3.0NANANA18.0NANANA27.0NANANA
us-gaap:PrepaidExpenseAndOtherAssetsCurrent ▂██▃▁▃▂▄▁▃▃▄▁▃▃▄▂▄▃▄▂▃▄▃217.0534.0525.0266.0151.0245.0199.0290.0137.0255.0229.0319.0141.0232.0273.0307.0197.0281.0255.0308.0179.0271.0285.0267.0NANA288.0NANANA
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-31
us-gaap:ConstructionInProgressGross NANA2408.0NANANA2167.0NANANA1610.0NANANA1425.01976.01871.01635.01471.01572.01365.01326.01338.0NANANANANANANA
 us-gaap:ConstructionInProgressGross us-gaap:PublicUtilityRegulatedOrUnregulatedStatus us-gaap:RegulatedOperationNANA1384.0NANANA1269.0NANANA1010.0NANANA987.0NANANA979.0NANANA1094.0NANANANANANANA
 us-gaap:ConstructionInProgressGross us-gaap:PublicUtilityRegulatedOrUnregulatedStatus us-gaap:UnregulatedOperationNANA1024.0NANANA898.0NANANA600.0NANANA438.0NANANA492.0NANANA244.0NANANANANANANA
us-gaap:AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment ██▇▇▇▆▆▆▅▅▅▅▄▄▃▃▃▃▂▂▂▁▁▁10185.010028.09799.09713.09493.09262.09059.08886.08692.08518.08359.08238.07951.07767.07497.07438.07305.07158.06986.06874.06722.06547.06372.06289.0NANA5796.0NANANA
us-gaap:PropertyPlantAndEquipmentNet ██▇▇▇▇▆▆▆▅▅▅▅▅▅▅▄▄▄▄▄▃▃▁27648.027168.026751.026432.025882.025488.025218.024750.024373.023555.023459.023125.022917.022757.022669.022682.022290.021797.021548.021124.020830.020698.020711.017029.0NA20711.017099.017099.0NANA
 us-gaap:InvestmentsInAffiliatesSubsidiariesAssociatesAndJointVentures us-gaap:ConsolidatedEntities srt:ParentCompanyNANA18356.0NANANA16812.0NANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:Goodwill ███████████████████████▁3119.03119.03119.03119.03119.03119.03119.03127.03127.03127.03127.03127.03127.03127.03127.03124.03124.03124.03124.03113.03113.03113.03115.01361.0NANA1361.0NANANA
us-gaap:IntangibleAssetsNetExcludingGoodwill ▁▁▁▁▁▁▁▁▁▂▂▂▂▂▂▇▇▇██████300.0302.0305.0307.0310.0313.0314.0316.0318.0321.0323.0326.0327.0327.0328.0524.0531.0534.0538.0541.0547.0548.0556.0541.0NANA569.0NANANA
us-gaap:FiniteLivedIntangibleAssetsNet NANA305.0NANANA314.0NANANA323.0NANANA328.0NANANA538.0NANANA556.0NANANA569.0NANANA
 us-gaap:FiniteLivedIntangibleAssetsNet us-gaap:FiniteLivedIntangibleAssetsByMajorClass agr:WindDevelopmentNANA303.0NANANA302.0NANANA313.0NANANA319.0NANANA333.0NANANA341.0NANANA354.0NANANA
 us-gaap:FiniteLivedIntangibleAssetsNet us-gaap:FiniteLivedIntangibleAssetsByMajorClass us-gaap:OtherIntangibleAssetsNANA2.0NANANA12.0NANANA10.0NANANA9.0NANANA6.0NANANA7.0NANANA7.0NANANA
us-gaap:OperatingLeaseRightOfUseAsset ██▇▄▄▄▄▄▄▄▁171.0177.0153.068.066.067.070.073.077.081.00.0NANANANANANANANANANANANANANANANANANANA
us-gaap:OtherAssetsNoncurrent ▇▇▇██▇▇▅▅▆▄▂▂▂▂▂▂▅▅▁▁▁▁▁348.0350.0331.0386.0382.0346.0311.0244.0247.0307.0162.0105.093.083.071.074.075.0215.0241.050.047.054.035.060.0NANA79.0NANANA
us-gaap:EquitySecuritiesFvNi ▁▁█57.057.063.0NANANANANANANANANANANANANANANANANANANANANANANANANANANA
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-31
us-gaap:AccountsPayableAndAccruedLiabilitiesCurrent ▇▇██▆▄▇▄▄▄▅▄▃▃▄▃▃▃▄▃▂▁▂1348.01416.01453.01481.01213.01064.01361.01060.01012.01084.01132.01008.0940.0928.01071.0951.0901.0902.01096.0910.0814.0724.0830.0NANANANANANANA
us-gaap:ContractWithCustomerLiabilityCurrent ▇▁▅▂█▁▆▂█▁▅11.05.09.06.012.05.010.06.012.05.09.0NANANA8.0NANANANANANANANANANANANANANANA
us-gaap:DividendsPayableCurrent █▂▂▂▂▂▂▂▂▂▂▂▁▁▁▁▁▁▁170.0136.0136.0136.0136.0136.0136.0136.0136.0137.0136.0136.0134.0134.0134.0133.0134.0134.0134.0NANANANANANANANANANANA
us-gaap:LiabilitiesCurrent ▅▄▅█▆▆▆▅▄▅▅▅▃▄▅▅▄▄▄▃▂▂▂▁2958.02792.03069.04184.03235.03447.03587.02848.02812.03153.03004.02911.02340.02716.03114.02934.02472.02588.02712.02153.01922.01821.02035.01499.0NANA1773.0NANANA
us-gaap:LongTermDebtCurrent NANA313.0813.0523.0726.0730.0232.0374.0325.0394.0523.0362.0214.0183.0267.0307.0325.0349.0187.0168.0166.0206.0173.0NANA148.0NANANA
us-gaap:NotesPayableCurrent NANA307.0NANANANANANANA587.0NANANA786.0NANANA161.0NANANA163.0NANANANANANANA
us-gaap:OperatingLeaseLiabilityCurrent ██▄▆▆█▆▆▆▅▁16.016.08.011.013.017.012.012.011.010.00.0NANANANANANANANANANANANANANANANANANANA
us-gaap:OtherLiabilitiesCurrent █▆▇▄▃▄▆▅▃▄▅▅▄▇▅▅▂▃▃▂▁▃▃▂381.0348.0368.0296.0290.0292.0334.0318.0291.0304.0327.0325.0307.0356.0330.0316.0265.0283.0279.0258.0242.0285.0285.0257.0NANA275.0NANANA
us-gaap:TaxesPayableCurrent ▅▅▇▇▅▆▅▆▅▆▅▇▁▅█▆▅▅▅▆▄▅▅▄59.060.073.082.061.062.056.071.056.068.059.074.011.059.089.062.056.061.052.067.050.054.055.045.0NANA8.0NANANA
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-31
us-gaap:LiabilitiesNoncurrent ▅██▅▅▅▅▅▅▄▄▄▄▄▄▄▄▄▄▄▄▄▄▁15857.018984.018928.015602.015705.015238.015243.015181.014780.013999.013760.013389.013568.013448.013461.013770.013772.013556.013475.013405.013424.013594.013642.010251.0NANA10023.0NANANA
us-gaap:LongTermDebt NANA2834.0NANANANANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:LongTermDebtNoncurrent ███▇█▇▇▇▆▅▅▄▅▅▅▄▄▄▄▃▄▄▄▁7274.07401.07478.07081.07159.06715.06716.06718.06282.05487.05368.05096.05261.05160.05196.04767.04773.04507.04510.04399.04507.04519.04530.02794.0NANA2516.0NANANA
us-gaap:LongTermDebtAndCapitalLeaseObligations NANA7478.0NANANA6716.0NANANA5368.0NANANA5196.0NANANA4510.0NANANA4530.0NANANANANANANA
us-gaap:DeferredIncomeTaxLiabilitiesNet █▆▆▂▂▂▁1975.01924.01919.01846.01828.01826.01814.0NANANA1530.0NANANANANANANANANANANANANANANANANANANA
 us-gaap:PensionAndOtherPostretirementDefinedBenefitPlansLiabilitiesNoncurrent us-gaap:RetirementPlanType us-gaap:OtherPostretirementBenefitPlansDefinedBenefitNANA280.0NANANA279.0NANANA272.0NANANA321.0NANANA330.0NANANANANANANANANANANA
 us-gaap:PensionAndOtherPostretirementDefinedBenefitPlansLiabilitiesNoncurrent us-gaap:RetirementPlanType us-gaap:PensionPlansDefinedBenefitNANA727.0NANANA821.0NANANA830.0NANANA728.0NANANA776.0NANANANANANANANANANANA
us-gaap:MinorityInterest █████▇▅▅▅▄▄▅▅▃▁▁▁▁▁▁▁▁▁▁596.0611.0617.0631.0638.0582.0349.0368.0414.0298.0299.0327.0333.0148.019.015.014.013.013.013.013.013.013.016.0NANA16.0NANANA
us-gaap:OtherLiabilitiesNoncurrent ███▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁5460.05433.05313.0450.0425.0390.0380.0539.0527.0530.0499.0401.0400.0365.0360.0367.0367.0354.0342.0340.0297.0314.0330.0247.0NANA278.0NANANA
us-gaap:OperatingLeaseLiabilityNoncurrent ██▇▃▃▃▄▄▄▄▁167.0172.0154.042.041.056.065.064.069.073.00.0NANANANANANANANANANANANANANANANANANANA
us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearTwo NANA15.0NANANANANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearThree NANA13.0NANANANANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearFour NANA10.0NANANANANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearFive NANA10.0NANANANANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueAfterYearFive NANA182.0NANANANANANANANANANANANANANANANANANANANANANANANANANANA
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-31
us-gaap:StockholdersEquity █▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▁19239.015381.015209.015223.015278.015326.015237.015150.015135.015158.015104.015128.015135.015171.015077.015202.015227.015239.015109.015038.015052.015111.015053.012631.0NANA12440.0NANANA
us-gaap:StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest █▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▁▁▁▁▁19835.015992.015826.015854.015916.015908.015586.015518.015549.015456.015403.015455.015468.015319.015096.015217.015241.015252.015122.015051.015065.015124.015066.012647.012597.012584.012456.012358.0NANA
us-gaap:CommonStockValue ███████████████████████▁3.03.03.03.03.03.03.03.03.03.03.03.03.03.03.03.03.03.03.03.03.03.03.00.0NANA0.0NANANA
us-gaap:AdditionalPaidInCapitalCommonStock █▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▁17671.013667.013665.013664.013664.013667.013660.013659.013659.013658.013657.013656.013655.013654.013653.013656.013655.013653.013653.013652.013651.013653.013653.011378.0NANA11378.0NANANA
us-gaap:RetainedEarningsAccumulatedDeficit ▇█▅▆▆▇▆▅▄▅▄▄▄▄▃▅▅▅▄▃▃▄▃▁1790.01864.01666.01684.01733.01784.01681.01599.01594.01620.01528.01536.01550.01579.01475.01605.01639.01649.01544.01471.01496.01527.01449.01332.0NANA1161.0NANANA
us-gaap:AccumulatedOtherComprehensiveIncomeLossNetOfTax ▁▄▅▅▅▅▆▆▅▅▇█▇███▇▇▆▆▆▇█▇▆▆▆▆▆-209.0-137.0-111.0-114.0-108.0-116.0-95.0-99.0-109.0-111.0-72.0-55.0-61.0-57.0-46.0-54.0-62.0-61.0-86.0-84.0-94.0-72.0-52.0-79.0-96.0-98.0-99.0-95.0-96.0NA
 us-gaap:AccumulatedOtherComprehensiveIncomeLossNetOfTax us-gaap:ConsolidatedEntities srt:ParentCompanyNANA-111.0NANANA-95.0NANANA-72.0NANANA-46.0NANANANANANANANANANANANANANANA
us-gaap:MinorityInterest █████▇▅▅▅▄▄▅▅▃▁▁▁▁▁▁▁▁▁▁596.0611.0617.0631.0638.0582.0349.0368.0414.0298.0299.0327.0333.0148.019.015.014.013.013.013.013.013.013.016.0NANA16.0NANANA
us-gaap:StockIssuedDuringPeriodValueNewIssues █▁3999.0-1.0NA0.0-1.0NANANANANANA0.0NANANANANA1.0NA0.0NANANANANANANANANANA
us-gaap:AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue ▇▆▆▅▄█▆▅▆▆▆▆▆▁▄▆▆▆▆5.03.01.00.0-2.07.01.00.01.01.01.01.01.0-11.0-3.01.02.01.01.0NANANANANANANANANANANA
us-gaap:MinorityInterestDecreaseFromDistributionsToNoncontrollingInterestHolders ▁▂▁▁▂▁▄█▂▂▄▅▇▃2.03.00.01.03.01.016.037.07.03.016.019.030.011.0NANANANANANANANANANANANANANANANA
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-31
us-gaap:NetCashProvidedByUsedInOperatingActivities ▅▅▁▁█▃▄▅▆▃▆▃▄█▅▅426.0425.0196.0208.0577.0307.0349.0427.0502.0315.0474.0334.0386.0597.0441.0397.0NANANANANANANANANANANANANANA
us-gaap:NetCashProvidedByUsedInInvestingActivities ▇▄▁▅▅▃▅▃▁▅▅▆██▄▄-362.0-639.0-902.0-604.0-603.0-749.0-557.0-704.0-926.0-526.0-531.0-427.0-283.0-323.0-674.0-622.0NANANANANANANANANANANANANANA
us-gaap:NetCashProvidedByUsedInFinancingActivities ▅▁█▃▂▃▃▃▄▃▂▂▂▁▃▃852.0-436.02067.0451.045.0290.0284.0213.0558.0206.060.076.0-91.0-275.0245.0217.0NANANANANANANANANANANANANANA
us-gaap:CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect ▆▁█▃▃▃▄▃▄▃916.0-650.01361.055.019.0-152.076.0-64.0134.0-5.0NANANANANANANANANANANANANANANANANANANANA
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-31
us-gaap:NetCashProvidedByUsedInOperatingActivities ▅▅▁▁█▃▄▅▆▃▆▃▄█▅▅426.0425.0196.0208.0577.0307.0349.0427.0502.0315.0474.0334.0386.0597.0441.0397.0NANANANANANANANANANANANANANA
us-gaap:NetIncomeLoss ▄█▅▄▄▆▆▅▄▆▄▄▄▆▁▄▄▆▆▄▄▆▄▃▂▄▄▃▃▆98.0334.0166.087.088.0240.0223.0150.0110.0217.0119.0125.0107.0244.0-77.099.0120.0239.0207.0109.0102.0212.096.054.011.0106.097.064.063.0200.0
us-gaap:ProfitLoss ▄█▅▄▄▆▆▅▄▆▄▅▄▇▁▄▄▇▆▄▄▆▄▃▃▄▄▃▃▆84.0321.0152.081.076.0230.0216.0139.0105.0216.0116.0134.0110.0238.0-77.0100.0120.0239.0207.0109.0102.0212.096.054.011.0106.097.064.062.0201.0
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-31
us-gaap:NetCashProvidedByUsedInInvestingActivities ▇▄▁▅▅▃▅▃▁▅▅▆██▄▄-362.0-639.0-902.0-604.0-603.0-749.0-557.0-704.0-926.0-526.0-531.0-427.0-283.0-323.0-674.0-622.0NANANANANANANANANANANANANANA
us-gaap:PaymentsToAcquirePropertyPlantAndEquipment ▆▅▇▅▅▆▆▆█▄▅▄▃▃▆▅▅▄▆▃▃▂▃▁▁▃▂641.0623.0821.0615.0603.0742.0695.0708.0912.0425.0614.0422.0352.0399.0712.0635.0544.0525.0671.0362.0398.0276.0412.0140.0166.0364.0255.0NANANA
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-31
us-gaap:NetCashProvidedByUsedInFinancingActivities ▅▁█▃▂▃▃▃▄▃▂▂▂▁▃▃852.0-436.02067.0451.045.0290.0284.0213.0558.0206.060.076.0-91.0-275.0245.0217.0NANANANANANANANANANANANANANA
us-gaap:ProceedsFromIssuanceOfLongTermDebt NANA400.0223.0744.00.0500.0449.0994.0194.0273.0-1.0325.00.0594.00.0NANANANANANANANANANANANANANA
us-gaap:RepaymentsOfLongTermDebt NA2.0500.08.0500.03.02.0150.0151.043.0152.00.063.02.0240.042.019.04.0272.038.03.042.073.0-1.0NANA-7.0NANANA
us-gaap:PaymentsOfDividends ▆▆█▆▆▆█▆█▄▆▃▁▃▃▁▃▃▃▁136.0136.0137.0136.0136.0136.0137.0136.0137.0135.0136.0134.0133.0134.0134.0133.0134.0134.0134.0133.0NANANANANANANANANANA
us-gaap:Dividends █▂▂▂▂▂▂▂▂▂▂▂▁▁▁▁▁▁▁▁▁▁171.0136.0137.0136.0136.0136.0137.0136.0136.0136.0136.0137.0133.0134.0134.0133.0134.0134.0134.0134.0133.0134.0NANANANANANANANA
us-gaap:PaymentsForRepurchaseOfCommonStock ▁█▁▁0.02.00.00.0NANA0.00.0NANA0.00.0NANA0.00.0NANA1.00.0NANANANANANANANANANA
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-31
 us-gaap:DebtInstrumentInterestRateStatedPercentage us-gaap:ConsolidatedEntities,us-gaap:DebtInstrument,us-gaap:LongtermDebtType srt:ParentCompany,agr:IberdrolaLoan,us-gaap:SubordinatedDebtNANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
 us-gaap:DebtInstrumentInterestRateStatedPercentage us-gaap:ConsolidatedEntities,us-gaap:Range,us-gaap:DebtInstrument,us-gaap:LongtermDebtType srt:ParentCompany,srt:Maximum,agr:IberdrolaLoan,us-gaap:SubordinatedDebtNANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA

Common Stock Value

us-gaap:CommonStockValue

us-gaap:CommonStockValue


Common
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302014-12-31
Value3000000.03000000.03000000.03000000.03000000.03000000.03000000.03000000.03000000.03000000.03000000.03000000.03000000.03000000.03000000.03000000.03000000.03000000.03000000.03000000.03000000.03000000.03000000.000
Percentage of CommonStockValue100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.00.0
Percentage of Assets0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

Weighted Average Number Of Diluted Shares Outstanding

us-gaap:WeightedAverageNumberOfDilutedSharesOutstanding

us-gaap:WeightedAverageNumberOfDilutedSharesOutstanding


Weighted
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-312017-09-302017-06-302017-03-312016-09-302016-06-302016-03-312015-09-302015-06-302015-03-31
Value347309309309309309309309309309309309309309309309309252252252
Percentage of WeightedAverageNumberOfDilutedSharesOutstanding100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Weighted Average Number Of Shares Outstanding Basic

us-gaap:WeightedAverageNumberOfSharesOutstandingBasic

us-gaap:WeightedAverageNumberOfSharesOutstandingBasic


Weighted
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-312017-09-302017-06-302017-03-312016-09-302016-06-302016-03-312015-09-302015-06-302015-03-31
Value347309309309309309309309309309309309309309309309309252252252
Percentage of WeightedAverageNumberOfSharesOutstandingBasic100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Earnings Per Share Basic

us-gaap:EarningsPerShareBasic

us-gaap:EarningsPerShareBasic


Earnings
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-31
Value0.281.080.540.280.280.780.720.480.360.70.380.40.350.79-0.250.320.390.770.680.350.330.690.370.220.040.42
Percentage of EarningsPerShareBasic100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Earnings Per Share Diluted

us-gaap:EarningsPerShareDiluted

us-gaap:EarningsPerShareDiluted


Earnings
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-31
Value0.281.080.540.280.280.780.720.480.360.70.380.40.340.79-0.250.320.390.770.680.350.330.690.370.220.040.42
Percentage of EarningsPerShareDiluted100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Comprehensive Income Net Of Tax

us-gaap:ComprehensiveIncomeNetOfTax

us-gaap:ComprehensiveIncomeNetOfTax


Comprehensive
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-31
Value263081698196219227160112190102131103234-69.010711926420511980192123711310793
Percentage of ComprehensiveIncomeNetOfTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax1.715.90.05.87.113.314.111.78.510.86.19.48.213.7-4.58.08.915.013.78.45.611.510.76.81.48.78.3

Comprehensive Income Net Of Tax Attributable To Noncontrolling Interest

us-gaap:ComprehensiveIncomeNetOfTaxAttributableToNoncontrollingInterest

us-gaap:ComprehensiveIncomeNetOfTaxAttributableToNoncontrollingInterest


Comprehensive
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-30
Value-14000000.0-13000000.0-14000000.0-6000000.0-12000000.0-10000000.0-7000000.0-11000000.0-5000000.0-1000000.0-3000000.09000000.03000000.0-6000000.001000000.0
Percentage of ComprehensiveIncomeNetOfTaxAttributableToNoncontrollingInterest100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax-0.9-0.70.0-0.4-0.9-0.6-0.4-0.8-0.4-0.1-0.20.60.2-0.40.00.1

Comprehensive Income Net Of Tax Including Portion Attributable To Noncontrolling Interest

us-gaap:ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest

us-gaap:ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest


Comprehensive
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-31
Value12295155758420922014910718999140106228-69.0108119264205119801921237113107
Percentage of ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax0.815.20.05.36.212.713.710.98.110.75.910.08.513.4-4.58.18.915.013.78.45.611.510.76.81.48.7

Disposal Group Not Discontinued Operation Gain Loss On Disposal

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

us-gaap:DisposalGroupNotDiscontinuedOperationGainLossOnDisposal

us-gaap:DisposalGroupDisposedOfBySaleNotDiscontinuedOperations, agr:SolarProjectsInNevada


Disposal
Period End2021-05-13
Value4.0
Percentage of DisposalGroupNotDiscontinuedOperationGainLossOnDisposal100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax0.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:DisposalGroupDisposedOfBySaleNotDiscontinuedOperations agr:SolarProjectsInNevada0.0

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

us-gaap:IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest

us-gaap:IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest


Income
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-30
Value943351609670242256172134257158163137310-515.01321643422571622743162711016148135102
Percentage of IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax6.317.30.06.85.214.615.912.510.114.59.511.711.018.2-33.69.812.319.517.211.419.018.92.310.51.712.112.110.4

Income Tax Expense Benefit

us-gaap:IncomeTaxExpenseBenefit

us-gaap:IncomeTaxExpenseBenefit


Income
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-30
Value10.0148.015-6.0124033294142292772-438.032441035053172104-69.0565.0423838
Percentage of IncomeTaxExpenseBenefit100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax0.70.70.01.1-0.40.72.52.42.22.32.52.12.24.2-28.62.43.35.93.43.712.06.2-6.05.30.53.43.43.9

us-gaap:IncomeTaxExpenseBenefit us-gaap:ConsolidationItems

agr:CorporateAndEliminations


Income
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-31
Value7.0-19.0-10.02.0-2.0-1.0-15.03.022-24.0
Percentage of IncomeTaxExpenseBenefit70.0-135.7-125.013.333.3-8.3-37.59.175.9-58.5
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax0.5-1.00.00.1-0.1-0.1-0.90.21.7-1.4
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax agr:CorporateAndEliminations0.00.00.00.00.00.00.00.00.00.0

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

us-gaap:OperatingSegments, agr:NetworksSegment


Income
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value2442452012433628256451312364875756116
Percentage of IncomeTaxExpenseBenefit240.0300.0562.5133.3-200.0358.390.084.886.2156.1121.4106.985.288.9-19.9178.1127.3112.6
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax1.62.20.01.40.92.62.22.01.93.63.12.21.83.85.74.34.26.6
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:OperatingSegments agr:NetworksSegment0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:OperatingSegments, agr:RenewablesSegment


Income
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-30
Value-21.0-9.0-27.0-7.0-16.0-30.0192.0-18.01.0-1.02.0-24.0-8.0-282.0-23.0
Percentage of IncomeTaxExpenseBenefit-210.0-64.3-337.5-46.7266.7-250.047.56.1-62.12.4-2.46.9-88.9-11.164.4-71.9
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax-1.4-0.50.0-0.5-1.2-1.81.20.1-1.40.1-0.10.1-1.9-0.5-18.4-1.7
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:OperatingSegments agr:RenewablesSegment0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

Income Taxes Paid Net

us-gaap:IncomeTaxesPaidNet

us-gaap:IncomeTaxesPaidNet


Income
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-31
Value1.04.04.02.00.02.0-2.01.01.02.0-2.02.04.0-17.04.01.05.03.00.02.02.05.0-3.02.02.06.0-3.0
Percentage of IncomeTaxesPaidNet100.0100.0100.0100.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax0.10.20.00.10.00.1-0.10.10.10.1-0.10.10.3-1.00.30.10.40.20.00.10.10.3-0.30.20.20.5-0.3

Interest Expense

us-gaap:InterestExpense

us-gaap:InterestExpense


Interest
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-30
Value75736586897680727678847570747071687156606884766466616561
Percentage of InterestExpense100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax5.03.80.06.16.64.65.05.25.74.45.05.45.64.34.65.35.14.03.84.24.75.06.66.17.05.05.86.2

us-gaap:InterestExpense us-gaap:ConsolidationItems

agr:CorporateAndEliminations


Interest
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-31
Value22202224227.08.07.07.06.0
Percentage of InterestExpense29.327.433.827.924.79.210.09.79.27.7
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax1.51.00.01.71.60.40.50.50.50.3
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax agr:CorporateAndEliminations0.00.00.00.00.00.00.00.00.00.0

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

us-gaap:OperatingSegments, agr:NetworksSegment


Interest
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value535335636868686666687164656061625863
Percentage of InterestExpense70.772.653.873.376.489.585.091.786.887.284.585.392.981.187.187.385.388.7
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax3.62.70.04.55.14.14.24.85.03.84.34.65.23.54.04.64.43.6
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:OperatingSegments agr:NetworksSegment0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:OperatingSegments, agr:RenewablesSegment


Interest
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-30
Value8.0-1.0-1.01.04.0-1.02.04.05.0137.08.05.07.0
Percentage of InterestExpense12.3-1.2-1.11.35.0-1.42.65.16.017.310.010.87.19.9
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax0.0-0.1-0.10.10.2-0.10.20.20.30.90.60.50.30.5
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:OperatingSegments agr:RenewablesSegment0.00.00.00.00.00.00.00.00.00.00.00.00.00.0

Interest Paid Net

us-gaap:InterestPaidNet

us-gaap:InterestPaidNet


Interest
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-31
Value925172587870835867586546644958455445476857571739423427
Percentage of InterestPaidNet100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax6.22.60.04.15.84.25.24.25.13.33.93.35.12.93.83.44.12.63.24.84.03.41.53.74.52.82.4

Net Income Loss

us-gaap:NetIncomeLoss

us-gaap:NetIncomeLoss


Net
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-31
Value983341668788240223150110217119125107244-77.099120239207109102212965411106976463200
Percentage of NetIncomeLoss100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax6.617.30.06.26.514.513.910.98.312.37.19.08.614.3-5.07.49.013.613.97.77.112.78.35.21.28.68.76.56.712.9

Net Income Loss Attributable To Noncontrolling Interest

us-gaap:NetIncomeLossAttributableToNoncontrollingInterest

us-gaap:NetIncomeLossAttributableToNoncontrollingInterest


Net
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302015-09-302014-09-30
Value-14000000.0-13000000.0-14000000.0-6000000.0-12000000.0-10000000.0-7000000.0-11000000.0-5000000.0-1000000.0-3000000.09000000.03000000.0-6000000.001000000.000
Percentage of NetIncomeLossAttributableToNoncontrollingInterest100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0100.00.00.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax-0.9-0.70.0-0.4-0.9-0.6-0.4-0.8-0.4-0.1-0.20.60.2-0.40.00.10.00.0

Operating Income Loss

us-gaap:OperatingIncomeLoss

us-gaap:OperatingIncomeLoss


Operating
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-31
Value131406222165155327216239207341249253222403-425.01892233983062173223498316173196186153132414
Percentage of OperatingIncomeLoss100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax8.821.00.011.711.519.813.417.415.719.315.018.117.823.7-27.714.116.822.620.515.322.420.97.215.47.816.016.615.614.126.6

us-gaap:OperatingIncomeLoss us-gaap:ConsolidationItems

agr:CorporateAndEliminations


Operating
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312017-09-302016-09-30
Value0.01.02.0-2.03.05.0114.03.0-3.07.014
Percentage of OperatingIncomeLoss0.00.20.9-1.21.91.55.11.71.4-0.93.76.5
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax0.00.10.0-0.10.20.30.70.30.2-0.20.51.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax agr:CorporateAndEliminations0.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:OperatingIncomeLoss us-gaap:ConsolidationItems, us-gaap:StatementBusinessSegments

us-gaap:OperatingSegments, agr:NetworksSegment


Operating
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-31
Value147313260160148309225182155331241207183344255207196336297178299312
Percentage of OperatingIncomeLoss112.277.1117.197.095.594.5104.276.274.997.196.881.882.485.4-60.0109.587.984.497.182.092.989.4
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax9.916.20.011.411.018.714.013.311.718.714.514.814.720.216.615.414.719.119.912.620.818.7
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:OperatingSegments agr:NetworksSegment0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:OperatingSegments, agr:RenewablesSegment


Operating
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-30
Value-16.092-40.07.04.013-20.0534913-3.0405544-16.02.0
Percentage of OperatingIncomeLoss-12.222.7-18.04.22.64.0-9.322.223.73.8-1.215.824.810.93.81.1
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax-1.14.80.00.50.30.8-1.23.93.70.7-0.22.94.42.6-1.00.1
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:OperatingSegments agr:RenewablesSegment0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

Other Comprehensive Income Loss Net Of Tax

us-gaap:OtherComprehensiveIncomeLossNetOfTax

us-gaap:OtherComprehensiveIncomeLossNetOfTax


Other
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-30
Value-72.0-26.03.0-6.08.0-21.04.010.02.0-27.0-17.06.0-4.0-10.08.08.0-1.025-2.010.0-22.0-20.027172.01.0-4.01.0
Percentage of OtherComprehensiveIncomeLossNetOfTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax-4.8-1.30.0-0.40.6-1.30.20.70.2-1.5-1.00.4-0.3-0.60.50.6-0.11.4-0.10.7-1.5-1.22.31.60.20.1-0.40.1

us-gaap:OtherComprehensiveIncomeLossNetOfTax us-gaap:StatementEquityComponents

agr:AccumulatedNetGainLossfromCashFlowHedgesAttributabletoParentReclassificationtoNetIncomeGainLossesonCashFlowHedges


Other
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-30
Value4.01.07.09.01.02.03.05.01.0-2.0-17.0-1.00.010.039-3.0
Percentage of OtherComprehensiveIncomeLossNetOfTax-5.6-3.8233.3-150.012.5-9.575.050.050.07.4100.0-16.7-0.0-100.0487.5-37.5
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax0.30.10.00.60.10.10.20.40.1-0.1-1.0-0.10.00.62.5-0.2
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax agr:AccumulatedNetGainLossfromCashFlowHedgesAttributabletoParentReclassificationtoNetIncomeGainLossesonCashFlowHedges0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

agr:AccumulatedNetGainLossfromCashFlowHedgesAttributabletoParentUnrealizedGainLossesonDerivativesQualifyingasCashFlowHedges


Other
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302017-12-312017-09-30
Value-73.0-27.09.0-15.07.0-23.00.05.02.0-29.0-21.05.0185.0
Percentage of OtherComprehensiveIncomeLossNetOfTax101.4103.8300.0250.087.5109.50.050.0100.0107.4123.583.3225.062.5
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax-4.9-1.40.0-1.10.5-1.40.00.40.2-1.6-1.30.41.20.4
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax agr:AccumulatedNetGainLossfromCashFlowHedgesAttributabletoParentUnrealizedGainLossesonDerivativesQualifyingasCashFlowHedges0.00.00.00.00.00.00.00.00.00.00.00.00.00.0

agr:UnrealizedGainLossFromEquityMethodInvestmentAttributableToParent


Other
Period End2021-06-30
Value-3.0
Percentage of OtherComprehensiveIncomeLossNetOfTax4.2
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax-0.2
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax agr:UnrealizedGainLossFromEquityMethodInvestmentAttributableToParent0.0

us-gaap:AccumulatedGainLossNetCashFlowHedgeParent


Other
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-31
Value-6.08.0-21.03.010.03.0-27.0
Percentage of OtherComprehensiveIncomeLossNetOfTax100.0100.0100.075.0100.0150.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax-0.40.6-1.30.20.70.2-1.5
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:AccumulatedGainLossNetCashFlowHedgeParent0.00.00.00.00.00.00.0

us-gaap:AccumulatedNetGainLossFromDesignatedOrQualifyingCashFlowHedges


Other
Period End2021-06-302021-03-312020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-30
Value-69.0-26.08.0-21.03.010.03.0-27.0-20.06.0-5.0-10.07.08.0
Percentage of OtherComprehensiveIncomeLossNetOfTax95.8100.0100.0100.075.0100.0150.0100.0117.6100.0125.0100.087.5100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax-4.6-1.30.6-1.30.20.70.2-1.5-1.20.4-0.4-0.60.50.6
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:AccumulatedNetGainLossFromDesignatedOrQualifyingCashFlowHedges0.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:AccumulatedOtherComprehensiveIncome


Other
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-31
Value-72.0-26.03.0-6.08.0-21.04.010.02.0-27.0-17.06.0-4.0-10.08.08.0-1.025-2.010.0-22.0-20.027172.01.0-4.0
Percentage of OtherComprehensiveIncomeLossNetOfTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax-4.8-1.30.0-0.40.6-1.30.20.70.2-1.5-1.00.4-0.3-0.60.50.6-0.11.4-0.10.7-1.5-1.22.31.60.20.1-0.4
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:AccumulatedOtherComprehensiveIncome0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:Parent


Other
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-31
Value-72.0-26.03.0-6.08.0-21.04.010.02.0-27.0-17.06.0-4.0-10.08.08.0-1.025-2.010.0-22.0-20.027172.01.0
Percentage of OtherComprehensiveIncomeLossNetOfTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax-4.8-1.30.0-0.40.6-1.30.20.70.2-1.5-1.00.4-0.3-0.60.50.6-0.11.4-0.10.7-1.5-1.22.31.60.20.1
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:Parent0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

Other Nonoperating Income Expense

us-gaap:OtherNonoperatingIncomeExpense

us-gaap:OtherNonoperatingIncomeExpense


Other
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-30
Value341.0-39.0162.0-3.0-18.06.02.0-7.0-9.0-16.0-20.0-21.023148.0134.03.02049171610.0122.019
Percentage of OtherNonoperatingIncomeExpense100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax2.30.10.01.10.1-0.2-1.10.40.2-0.4-0.5-1.1-1.6-1.21.51.00.60.70.30.21.42.91.51.51.11.00.21.9

Profit Loss

us-gaap:ProfitLoss

us-gaap:ProfitLoss


Profit
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-31
Value843211528176230216139105216116134110238-77.0100120239207109102212965411106976462201
Percentage of ProfitLoss100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax5.616.60.05.85.713.913.410.17.912.27.09.68.814.0-5.07.59.013.613.97.77.112.78.35.21.28.68.76.56.612.9

us-gaap:ProfitLoss us-gaap:StatementEquityComponents

us-gaap:NoncontrollingInterest


Profit
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-30
Value-14.0-13.0-14.0-6.0-12.0-10.0-7.0-11.0-5.0-1.0-3.09.03.0-6.00.01.0
Percentage of ProfitLoss-16.7-4.0-9.2-7.4-15.8-4.3-3.2-7.9-4.8-0.5-2.66.72.7-2.5-0.01.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax-0.9-0.70.0-0.4-0.9-0.6-0.4-0.8-0.4-0.1-0.20.60.2-0.40.00.1
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:NoncontrollingInterest0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:Parent


Profit
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-31
Value983341668788240223150110217119125107244-77.099120239207109102212965411106
Percentage of ProfitLoss116.7104.0109.2107.4115.8104.3103.2107.9104.8100.5102.693.397.3102.5100.099.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax6.617.30.06.26.514.513.910.98.312.37.19.08.614.3-5.07.49.013.613.97.77.112.78.35.21.28.6
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:Parent0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:RetainedEarnings


Profit
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-31
Value983341668788240223150110217119125107244-77.099120239207109102212965411106
Percentage of ProfitLoss116.7104.0109.2107.4115.8104.3103.2107.9104.8100.5102.693.397.3102.5100.099.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax6.617.30.06.26.514.513.910.98.312.37.19.08.614.3-5.07.49.013.613.97.77.112.78.35.21.28.6
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:RetainedEarnings0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

Revenue From Contract With Customer Excluding Assessed Tax

us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax

us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax


Revenue
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-31
Value148919351590140513451652160913721322176716651395124917021533134113311758149114181439167011531048939122711189829381556
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:ConsolidationItems

agr:CorporateReconcilingItemsAndEliminations


Revenue
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value-4.00.00.0-8.00.00.0-4.0-3.03.00.019
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax-0.30.00.0-0.50.00.0-0.2-0.20.20.01.1
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax-0.30.00.0-0.50.00.0-0.2-0.20.20.01.1
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax agr:CorporateReconcilingItemsAndEliminations100.00.00.0100.00.00.0100.0100.0100.00.0100.0

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

agr:CorporateReconcilingItemsAndEliminations, agr:OtherServices


Revenue
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value-4.00.00.0-8.00.00.0-4.0-2.02.0-6.015
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax-0.30.00.0-0.50.00.0-0.2-0.10.1-0.50.9
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax-0.30.00.0-0.50.00.0-0.2-0.10.1-0.50.9
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax agr:CorporateReconcilingItemsAndEliminations agr:OtherServices100.00.00.0100.00.00.0100.0100.0100.0100.0100.0

us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:ProductOrService

agr:OtherServices


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
Value554250362647343942261.0-9.0-10.017
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax3.72.23.12.61.92.82.12.83.21.50.1-0.6-0.81.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax3.72.23.12.61.92.82.12.83.21.50.1-0.6-0.81.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax agr:OtherServices100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

agr:SolarEnergy


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
Value7.04.03.06.06.04.04.09.08.05.05.04.06.02.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax0.50.20.20.40.40.20.20.70.60.30.30.30.50.1
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax0.50.20.20.40.40.20.20.70.60.30.30.30.50.1
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax agr:SolarEnergy100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

agr:ThermalEnergy


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
Value161212134.010.08.05.00.01611221.013
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax1.10.60.80.90.30.60.50.40.00.90.71.60.10.8
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax1.10.60.80.90.30.60.50.40.00.90.71.60.10.8
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax agr:ThermalEnergy100.0100.0100.0100.0100.0100.0100.0100.00.0100.0100.0100.0100.0100.0

agr:WindEnergy


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
Value24337118320022821118421822118291198180168
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax16.319.211.514.217.012.811.415.916.710.35.514.214.49.9
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax16.319.211.514.217.012.811.415.916.710.35.514.214.49.9
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax agr:WindEnergy100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ElectricityUsRegulated


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
Value9129429419848448738489228029139051010800926
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax61.248.759.270.062.852.852.767.260.751.754.472.464.154.4
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax61.248.759.270.062.852.852.767.260.751.754.472.464.154.4
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:ElectricityUsRegulated100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:NaturalGasUsRegulated


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
Value256564401166237507426179249625466169266572
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax17.229.125.211.817.630.726.513.018.835.428.012.121.333.6
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax17.229.125.211.817.630.726.513.018.835.428.012.121.333.6
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:NaturalGasUsRegulated100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

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

agr:OtherServices, agr:NetworksSegment


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
Value1410.020127.0192016183713146.025
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax0.90.51.30.90.51.21.21.21.42.10.81.00.51.5
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax0.90.51.30.90.51.21.21.21.42.10.81.00.51.5
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax agr:OtherServices agr:NetworksSegment100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

agr:OtherServices, agr:RenewablesSegment


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
Value413226281928222324-7.0-10.0-25.0-10.0-23.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax2.81.71.62.01.41.71.41.71.8-0.4-0.6-1.8-0.8-1.4
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax2.81.71.62.01.41.71.41.71.8-0.4-0.6-1.8-0.8-1.4
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax agr:OtherServices agr:RenewablesSegment100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

agr:SolarEnergy, agr:RenewablesSegment


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
Value7.04.03.06.06.04.04.09.08.05.05.04.06.02.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax0.50.20.20.40.40.20.20.70.60.30.30.30.50.1
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax0.50.20.20.40.40.20.20.70.60.30.30.30.50.1
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax agr:SolarEnergy agr:RenewablesSegment100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

agr:ThermalEnergy, agr:RenewablesSegment


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
Value161212134.010.08.05.00.01611221.013
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax1.10.60.80.90.30.60.50.40.00.90.71.60.10.8
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax1.10.60.80.90.30.60.50.40.00.90.71.60.10.8
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax agr:ThermalEnergy agr:RenewablesSegment100.0100.0100.0100.0100.0100.0100.0100.00.0100.0100.0100.0100.0100.0

agr:WindEnergy, agr:RenewablesSegment


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
Value24337118320022821118221822118291198180168
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax16.319.211.514.217.012.811.315.916.710.35.514.214.49.9
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax16.319.211.514.217.012.811.315.916.710.35.514.214.49.9
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax agr:WindEnergy agr:RenewablesSegment100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ElectricityUsRegulated, agr:NetworksSegment


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
Value9129429419848448738489228029139051010800926
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax61.248.759.270.062.852.852.767.260.751.754.472.464.154.4
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax61.248.759.270.062.852.852.767.260.751.754.472.464.154.4
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:ElectricityUsRegulated agr:NetworksSegment100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:NaturalGasUsRegulated, agr:NetworksSegment


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
Value256564401166237507426179249625466169266572
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax17.229.125.211.817.630.726.513.018.835.428.012.121.333.6
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax17.229.125.211.817.630.726.513.018.835.428.012.121.333.6
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:NaturalGasUsRegulated agr:NetworksSegment100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:StatementBusinessSegments

agr:NetworksSegment


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
Value11821516136211621088139912941117106915751384119310721523
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax79.478.385.782.780.984.780.481.480.989.183.185.585.889.5
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax79.478.385.782.780.984.780.481.480.989.183.185.585.889.5
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax agr:NetworksSegment100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

agr:RenewablesSegment


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
Value30741922424725725321625525319697199177160
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax20.621.714.117.619.115.313.418.619.111.15.814.314.29.4
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax20.621.714.117.619.115.313.418.619.111.15.814.314.29.4
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax agr:RenewablesSegment100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Revenues

us-gaap:Revenues

us-gaap:Revenues


Revenues
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-31
Value147719661669147013921789160914871400184216651546140218651533134113311758149114181439167011531048939122711189829381556
Percentage of Revenues100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax99.2101.6105.0104.6103.5108.3100.0108.4105.9104.2100.0110.8112.2109.6100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:Revenues us-gaap:ConsolidationItems

agr:CorporateAndEliminations


Revenuesus-gaap:
Period End2021-06-302020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-31
Value1.00.01.00.00.00.01.01.00.0
Percentage of Revenues0.10.00.10.00.00.00.10.10.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax0.10.00.10.00.00.00.10.10.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax agr:CorporateAndEliminations0.00.00.00.00.00.00.00.00.0

agr:CorporateReconcilingItemsAndEliminations


Revenuesus-gaap:
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value-3.0-1.00.0-8.00.00.0-4.0-3.03.00.029
Percentage of Revenues-0.2-0.10.0-0.50.00.0-0.2-0.20.20.01.6
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax-0.2-0.10.0-0.50.00.0-0.2-0.20.20.01.7
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax agr:CorporateReconcilingItemsAndEliminations75.00.00.0100.00.00.0100.0100.0100.00.0152.6

us-gaap:IntersegmentElimination


Revenuesus-gaap:
Period End2021-06-302020-12-312020-09-302020-06-302019-12-312019-09-302019-06-302019-03-312018-12-312018-09-30
Value-1.04.0-4.0-1.0-14.00.0-1.0-4.0-8.00.0
Percentage of Revenues-0.10.2-0.3-0.1-0.90.0-0.1-0.2-0.50.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax-0.10.3-0.3-0.1-0.90.0-0.1-0.2-0.50.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:IntersegmentElimination0.00.00.00.00.00.00.00.00.00.0

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

us-gaap:IntersegmentElimination, agr:NetworksSegment


Revenuesus-gaap:
Period End2021-06-302020-12-312020-09-302020-06-302019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-30
Value1.0-5.03.01.0-20.01.01.04.05.0-4.02.03.011-1.0
Percentage of Revenues0.1-0.30.20.1-1.20.10.10.20.3-0.30.10.20.7-0.1
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax0.1-0.30.20.1-1.20.10.10.20.3-0.30.20.20.7-0.1
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:IntersegmentElimination agr:NetworksSegment0.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:IntersegmentElimination, agr:RenewablesSegment


Revenuesus-gaap:
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
Value1.00.00.00.00.00.00.00.01.01.05.00.0
Percentage of Revenues0.10.00.00.00.00.00.00.00.10.10.30.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax0.10.00.00.00.00.00.00.00.10.10.30.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:IntersegmentElimination agr:RenewablesSegment0.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:OperatingSegments, agr:NetworksSegment


Revenuesus-gaap:
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-30
Value1218157314121194112014611333113910921600142012321103154912991126
Percentage of Revenues82.580.084.681.280.581.782.876.678.086.985.379.778.783.184.784.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax81.881.388.885.083.388.482.883.082.690.585.388.388.391.084.784.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:OperatingSegments agr:NetworksSegment0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:OperatingSegments, agr:RenewablesSegment


Revenuesus-gaap:
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-30
Value258393257275272328290347307242243315296283249241
Percentage of Revenues17.520.015.418.719.518.318.023.321.913.114.620.421.115.216.218.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax17.320.316.219.620.219.918.025.323.213.714.622.623.716.616.218.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:OperatingSegments agr:RenewablesSegment0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:Revenues us-gaap:DerivativeInstrumentRisk, us-gaap:StatementBusinessSegments

us-gaap:CommodityContract, agr:RenewablesSegment


Revenuesus-gaap:
Period End2021-06-30
Value1477
Percentage of Revenues100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax99.2
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:CommodityContract agr:RenewablesSegment0.0

us-gaap:InterestRateContract, agr:RenewablesSegment


Revenuesus-gaap:
Period End2021-06-30
Value75
Percentage of Revenues5.1
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax5.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:InterestRateContract agr:RenewablesSegment0.0

us-gaap:Revenues us-gaap:IncomeStatementLocation, us-gaap:StatementBusinessSegments, us-gaap:TransactionType

agr:OperatingRevenues, agr:RenewablesSegment, agr:NonTradingDerivatives


Revenuesus-gaap:
Period End2021-06-302021-03-312020-06-302020-03-31
Value1477196613921789
Percentage of Revenues100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax99.2101.6103.5108.3
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax agr:OperatingRevenues agr:RenewablesSegment agr:NonTradingDerivatives0.00.00.00.0

us-gaap:Revenues us-gaap:StatementBusinessSegments

agr:NetworksSegment


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
Value12191573140911971121146113131140109316041425122811051552
Percentage of Revenues82.580.084.481.480.581.781.676.778.187.185.679.478.883.2
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax81.981.388.685.283.388.481.683.182.790.885.688.088.591.2
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax agr:NetworksSegment103.1103.8103.5103.0103.0104.4101.5102.1102.2101.8103.0102.9103.1101.9

agr:RenewablesSegment


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
Value258393256276272328290347307242243315297284
Percentage of Revenues17.520.015.318.819.518.318.023.321.913.114.620.421.215.2
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax17.320.316.119.620.219.918.025.323.213.714.622.623.816.7
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax agr:RenewablesSegment84.093.8114.3111.7105.8129.6134.3136.1121.3123.5250.5158.3167.8177.5

Assets

us-gaap:Assets

us-gaap:Assets


Assets
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-03-312014-12-312014-09-302013-12-31
Value38650377683782335640348563459334416335473314132608321673175531376314833167131921314853139631309306093041130539307432439730743242522425223170
Percentage of Assets100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:Assets us-gaap:ConsolidatedEntities

srt:ParentCompany


Assetsus-gaap:
Period End2020-12-312019-12-312018-12-312017-12-31
Value22155199331737317017
Percentage of Assets58.657.954.053.7
Percentage of Assets58.657.954.053.7
Percentage of Assets srt:ParentCompany100.0100.0100.0100.0

us-gaap:VariableInterestEntityPrimaryBeneficiary


Assetsus-gaap:
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-31
Value170617081713172017281497806
Percentage of Assets4.44.54.54.85.04.32.3
Percentage of Assets4.44.54.54.85.04.32.3
Percentage of Assets us-gaap:VariableInterestEntityPrimaryBeneficiary100.0100.0100.0100.0100.0100.0100.0

us-gaap:Assets us-gaap:ConsolidationItems

agr:CorporateAndEliminations


Assetsus-gaap:
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312018-12-312017-12-312017-09-302016-12-312015-12-31
Value1287848364-1232.0-1058.0-704.0-1997.0-775.0-1431.0-526.0-452.0-1333.0
Percentage of Assets3.32.21.0-3.5-3.0-2.0-5.8-2.4-4.5-1.6-1.4-4.3
Percentage of Assets3.32.21.0-3.5-3.0-2.0-5.8-2.4-4.5-1.6-1.4-4.3
Percentage of Assets agr:CorporateAndEliminations100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

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

us-gaap:OperatingSegments, agr:NetworksSegment


Assetsus-gaap:
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312015-12-312014-12-31
Value252572510324592241782346723355232502268322491224082223921674213362148121411210332075920998207532012612858
Percentage of Assets65.366.565.067.867.367.567.667.667.968.769.168.368.068.267.665.965.966.966.365.553.0
Percentage of Assets65.366.565.067.867.367.567.667.667.968.769.168.368.068.267.665.965.966.966.365.553.0
Percentage of Assets us-gaap:OperatingSegments agr:NetworksSegment100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OperatingSegments, agr:RenewablesSegment


Assetsus-gaap:
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302017-12-312016-12-31
Value121061181712867126941244711942131631201211905110461070310516113089884
Percentage of Assets31.331.334.035.635.734.538.235.835.933.933.333.135.731.6
Percentage of Assets31.331.334.035.635.734.538.235.835.933.933.333.135.731.6
Percentage of Assets us-gaap:OperatingSegments agr:RenewablesSegment100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Liabilities

us-gaap:Liabilities

us-gaap:Liabilities


Liabilities
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302014-12-31
Value18815217762199719786189401868518830180291759217152167641630015908161641657516704162441614416187155581534615415156771175011796
Percentage of Liabilities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets48.757.758.255.554.354.054.753.753.152.652.151.350.751.352.352.351.651.451.750.850.550.551.048.248.6

us-gaap:Liabilities us-gaap:ConsolidatedEntities

srt:ParentCompany


Liabilitiesus-gaap:
Period End2020-12-312019-12-312018-12-312017-12-31
Value6946469622691940
Percentage of Liabilities31.624.913.511.7
Percentage of Assets18.413.67.16.1
Percentage of Assets srt:ParentCompany31.423.613.111.4

us-gaap:VariableInterestEntityPrimaryBeneficiary


Liabilitiesus-gaap:
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-31
Value78811071041025629
Percentage of Liabilities0.40.40.50.50.50.30.2
Percentage of Assets0.20.20.30.30.30.20.1
Percentage of Assets us-gaap:VariableInterestEntityPrimaryBeneficiary4.64.76.26.05.93.73.6

Liabilities And Stockholders Equity

us-gaap:LiabilitiesAndStockholdersEquity

us-gaap:LiabilitiesAndStockholdersEquity


Liabilities
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302014-12-31
Value38650377683782335640348563459334416335473314132608321673175531376314833167131921314853139631309306093041130539307432439724252
Percentage of LiabilitiesAndStockholdersEquity100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:LiabilitiesAndStockholdersEquity us-gaap:ConsolidatedEntities

srt:ParentCompany


Liabilities
Period End2020-12-312019-12-312018-12-312017-12-31
Value22155199331737317017
Percentage of LiabilitiesAndStockholdersEquity58.657.954.053.7
Percentage of Assets58.657.954.053.7
Percentage of Assets srt:ParentCompany100.0100.0100.0100.0

Stockholders Equity

us-gaap:StockholdersEquity

us-gaap:StockholdersEquity


Stockholders
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302014-12-31
Value19239153811520915223152781532615237151501513515158151041512815135151711507715202152271523915109150381505215111150531263112440
Percentage of StockholdersEquity100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets49.840.740.242.743.844.344.345.245.746.547.047.648.248.247.647.648.448.548.349.149.549.549.051.851.3

Assets Current

us-gaap:AssetsCurrent

us-gaap:AssetsCurrent


Assets
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302014-12-31
Value3670323937771923171318962025188018031998196319631700198122602021193220982252215322352323247427062299
Percentage of AssetsCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets9.58.610.05.44.95.55.95.65.46.16.16.25.46.37.16.36.16.77.27.07.37.68.011.19.5

us-gaap:AssetsCurrent us-gaap:ConsolidatedEntities

srt:ParentCompany


Assets
Period End2020-12-312019-12-312018-12-312017-12-31
Value340826979931192
Percentage of AssetsCurrent90.2133.250.652.7
Percentage of Assets9.07.83.13.8
Percentage of Assets srt:ParentCompany15.413.55.77.0

Cash And Cash Equivalents At Carrying Value

us-gaap:CashAndCashEquivalentsAtCarryingValue

us-gaap:CashAndCashEquivalentsAtCarryingValue


Cash
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302013-12-312012-12-31
Value17298131463101462617810316633363252404127363091182396403427105098565548252321954
Percentage of CashAndCashEquivalentsAtCarryingValue100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets4.52.23.90.30.10.10.50.30.50.10.10.10.20.10.10.10.10.10.30.61.31.31.44.30.02.12.02.20.90.0

us-gaap:CashAndCashEquivalentsAtCarryingValue us-gaap:ConsolidatedEntities

srt:ParentCompany


Cash
Period End2020-12-312019-12-312018-12-312017-12-31
Value14381460.08.0
Percentage of CashAndCashEquivalentsAtCarryingValue98.382.00.019.5
Percentage of Assets3.80.40.00.0
Percentage of Assets srt:ParentCompany6.50.70.00.0

Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents

us-gaap:CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents

us-gaap:CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents


Cash
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302016-12-312015-12-31
Value173381714671065132184108172384340574546344296434
Percentage of CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets4.52.23.90.30.10.10.50.30.50.10.10.10.20.10.10.10.10.31.4

us-gaap:CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents us-gaap:ConsolidatedEntities

srt:ParentCompany


Cash
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-31
Value14381460.08.067125
Percentage of CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents98.079.30.017.469.828.8
Percentage of Assets3.80.40.00.00.20.4
Percentage of Assets srt:ParentCompany6.50.70.00.00.00.0

Short Term Investments

us-gaap:ShortTermInvestments

us-gaap:ShortTermInvestments


Short
Period End2020-12-31
Value300
Percentage of ShortTermInvestments100.0
Percentage of Assets0.8

Accounts Receivable Net Current

us-gaap:AccountsReceivableNetCurrent

us-gaap:AccountsReceivableNetCurrent


Accounts
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302014-12-31
Value10941283118710219691077108296610091264114210609861113104094398411171119956894964974723841
Percentage of AccountsReceivableNetCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets2.83.43.12.92.83.13.12.93.03.93.63.33.13.53.33.03.13.63.63.12.93.23.23.03.5

Other Assets Current

us-gaap:OtherAssetsCurrent

us-gaap:OtherAssetsCurrent


Other
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-31
Value176.06.03.03.01827
Percentage of OtherAssetsCurrent100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets0.00.00.00.00.00.10.1

Prepaid Expense And Other Assets Current

us-gaap:PrepaidExpenseAndOtherAssetsCurrent

us-gaap:PrepaidExpenseAndOtherAssetsCurrent


Prepaid
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302014-12-31
Value217534525266151245199290137255229319141232273307197281255308179271285267288
Percentage of PrepaidExpenseAndOtherAssetsCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets0.61.41.40.70.40.70.60.90.40.80.71.00.40.70.91.00.60.90.81.00.60.90.91.11.2

us-gaap:PrepaidExpenseAndOtherAssetsCurrent us-gaap:ConsolidatedEntities

srt:ParentCompany


Prepaid
Period End2020-12-312019-12-312018-12-312017-12-31
Value3570.0210.0
Percentage of PrepaidExpenseAndOtherAssetsCurrent68.00.09.20.0
Percentage of Assets0.90.00.10.0
Percentage of Assets srt:ParentCompany1.60.00.10.0

Construction In Progress Gross

us-gaap:ConstructionInProgressGross

us-gaap:ConstructionInProgressGross


Construction
Period End2020-12-312019-12-312018-12-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-31
Value240821671610142519761871163514711572136513261338
Percentage of ConstructionInProgressGross100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets6.46.35.04.56.25.95.24.75.14.54.34.4

us-gaap:ConstructionInProgressGross us-gaap:PublicUtilityRegulatedOrUnregulatedStatus

us-gaap:RegulatedOperation


Construction
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-31
Value1384126910109879791094
Percentage of ConstructionInProgressGross57.558.662.769.366.681.8
Percentage of Assets3.73.73.13.13.13.6
Percentage of Assets us-gaap:RegulatedOperation0.00.00.00.00.00.0

us-gaap:UnregulatedOperation


Construction
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-31
Value1024898600438492244
Percentage of ConstructionInProgressGross42.541.437.330.733.418.2
Percentage of Assets2.72.61.91.41.60.8
Percentage of Assets us-gaap:UnregulatedOperation0.00.00.00.00.00.0

Accumulated Depreciation Depletion And Amortization Property Plant And Equipment

us-gaap:AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment

us-gaap:AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment


Accumulated
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302014-12-31
Value101851002897999713949392629059888686928518835982387951776774977438730571586986687467226547637262895796
Percentage of AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets26.426.625.927.327.226.826.326.526.226.126.025.925.324.723.723.323.222.822.322.522.121.420.725.823.9

us-gaap:AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment us-gaap:PublicUtilityRegulatedOrUnregulatedStatus

us-gaap:RegulatedOperation


Accumulated
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-31
Value536349694615417239703727
Percentage of AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment54.754.955.255.656.858.5
Percentage of Assets14.214.414.313.212.712.1
Percentage of Assets us-gaap:RegulatedOperation0.00.00.00.00.00.0

us-gaap:UnregulatedOperation


Accumulated
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-31
Value443640903744332530162645
Percentage of AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment45.345.144.844.443.241.5
Percentage of Assets11.711.911.610.59.68.6
Percentage of Assets us-gaap:UnregulatedOperation0.00.00.00.00.00.0

Property Plant And Equipment Net

us-gaap:PropertyPlantAndEquipmentNet

us-gaap:PropertyPlantAndEquipmentNet


Property
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-03-312014-12-312014-09-30
Value276482716826751264322588225488252182475024373235552345923125229172275722669226822229021797215482112420830206982071117029207111709917099
Percentage of PropertyPlantAndEquipmentNet100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets71.571.970.774.274.373.773.373.873.572.272.972.873.072.371.671.170.869.468.869.068.567.867.469.867.470.570.5

us-gaap:PropertyPlantAndEquipmentNet us-gaap:ConsolidatedEntities

us-gaap:VariableInterestEntityPrimaryBeneficiary


Property
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-30
Value162216371637165716651447787787
Percentage of PropertyPlantAndEquipmentNet5.96.06.16.36.45.73.13.2
Percentage of Assets4.24.34.34.64.84.22.32.3
Percentage of Assets us-gaap:VariableInterestEntityPrimaryBeneficiary95.195.895.696.396.496.797.60.0

us-gaap:PropertyPlantAndEquipmentNet us-gaap:ConsolidationItems

agr:CorporateAndEliminations


Property
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312018-12-312017-12-312017-09-30
Value9.09.010.010.010.010.010.08.07.01.0
Percentage of PropertyPlantAndEquipmentNet0.00.00.00.00.00.00.00.00.00.0
Percentage of Assets0.00.00.00.00.00.00.00.00.00.0
Percentage of Assets agr:CorporateAndEliminations0.71.12.7-0.8-0.9-1.4-0.5-1.0-0.5-0.2

us-gaap:PropertyPlantAndEquipmentNet us-gaap:ConsolidationItems, us-gaap:StatementBusinessSegments

us-gaap:OperatingSegments, agr:NetworksSegment


Property
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312015-12-312014-12-31
Value17872174931707916640162981603615840153721510414819147541438514162139961387613529133231316813032123638389
Percentage of PropertyPlantAndEquipmentNet64.664.463.863.063.062.962.862.162.062.962.962.261.861.561.259.659.860.460.559.749.1
Percentage of Assets46.246.345.246.746.846.446.045.845.645.445.945.345.144.543.842.442.341.941.640.234.6
Percentage of Assets us-gaap:OperatingSegments agr:NetworksSegment70.869.769.468.869.568.768.167.867.266.166.366.466.465.264.864.364.262.762.861.465.2

us-gaap:OperatingSegments, agr:RenewablesSegment


Property
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302017-12-312016-12-31
Value97679666966297829574944293689371926187288697873287868015
Percentage of PropertyPlantAndEquipmentNet35.335.636.137.037.037.037.137.938.037.137.137.838.837.2
Percentage of Assets25.325.625.527.427.527.327.227.927.926.827.027.527.725.6
Percentage of Assets us-gaap:OperatingSegments agr:RenewablesSegment80.781.875.177.176.979.171.278.077.879.081.383.077.781.1

us-gaap:PropertyPlantAndEquipmentNet us-gaap:PublicUtilityRegulatedOrUnregulatedStatus

us-gaap:RegulatedOperation


Property
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-31
Value170221577914695136511303212363
Percentage of PropertyPlantAndEquipmentNet63.662.662.660.260.559.7
Percentage of Assets45.045.845.743.141.640.2
Percentage of Assets us-gaap:RegulatedOperation0.00.00.00.00.00.0

us-gaap:UnregulatedOperation


Property
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-31
Value972994398764901885168348
Percentage of PropertyPlantAndEquipmentNet36.437.437.439.839.540.3
Percentage of Assets25.727.427.228.527.227.2
Percentage of Assets us-gaap:UnregulatedOperation0.00.00.00.00.00.0

Investments In Affiliates Subsidiaries Associates And Joint Ventures

us-gaap:InvestmentsInAffiliatesSubsidiariesAssociatesAndJointVentures us-gaap:ConsolidatedEntities

us-gaap:InvestmentsInAffiliatesSubsidiariesAssociatesAndJointVentures

srt:ParentCompany


Investments
Period End2020-12-312019-12-31
Value1835616812
Percentage of InvestmentsInAffiliatesSubsidiariesAssociatesAndJointVentures100.0100.0
Percentage of Assets48.548.8
Percentage of Assets srt:ParentCompany82.984.3

Goodwill

us-gaap:Goodwill

us-gaap:Goodwill


Goodwill
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302014-12-31
Value3119311931193119311931193119312731273127312731273127312731273124312431243124311331133113311513611361
Percentage of Goodwill100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets8.18.38.28.88.99.09.19.39.49.69.79.810.09.99.99.89.910.010.010.210.210.210.15.65.6

us-gaap:Goodwill us-gaap:StatementBusinessSegments

agr:NetworksSegment


Goodwillus-gaap:
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-31
Value274727472747274727442733979
Percentage of Goodwill88.188.187.887.887.887.771.9
Percentage of Assets7.38.08.58.78.88.94.0
Percentage of Assets agr:NetworksSegment0.00.00.00.00.013.67.6

agr:RenewableSegment


Goodwillus-gaap:
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-31
Value372372380380380380380
Percentage of Goodwill11.911.912.212.212.212.227.9
Percentage of Assets1.01.11.21.21.21.21.6
Percentage of Assets agr:RenewableSegment0.00.00.00.00.03.63.1

Intangible Assets Net Excluding Goodwill

us-gaap:IntangibleAssetsNetExcludingGoodwill

us-gaap:IntangibleAssetsNetExcludingGoodwill


Intangible
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302014-12-31
Value300302305307310313314316318321323326327327328524531534538541547548556541569
Percentage of IntangibleAssetsNetExcludingGoodwill100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets0.80.80.80.90.90.90.90.91.01.01.01.01.01.01.01.61.71.71.71.81.81.81.82.22.3

Finite Lived Intangible Assets Net

us-gaap:FiniteLivedIntangibleAssetsNet

us-gaap:FiniteLivedIntangibleAssetsNet


Finite
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-31
Value305314323328538556569
Percentage of FiniteLivedIntangibleAssetsNet100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets0.80.91.01.01.71.82.3

us-gaap:FiniteLivedIntangibleAssetsNet us-gaap:FiniteLivedIntangibleAssetsByMajorClass

agr:WindDevelopment


Finite
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-31
Value303302313319333341354
Percentage of FiniteLivedIntangibleAssetsNet99.396.296.997.361.961.362.2
Percentage of Assets0.80.91.01.01.11.11.5
Percentage of Assets agr:WindDevelopment0.00.00.00.00.00.00.0

us-gaap:OtherIntangibleAssets


Finite
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-31
Value2.01210.09.06.07.07.0
Percentage of FiniteLivedIntangibleAssetsNet0.73.83.12.71.11.31.2
Percentage of Assets0.00.00.00.00.00.00.0
Percentage of Assets us-gaap:OtherIntangibleAssets0.00.00.00.00.00.00.0

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
Value171177153686667707377810.0
Percentage of OperatingLeaseRightOfUseAsset100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0
Percentage of Assets0.40.50.40.20.20.20.20.20.20.20.0

Other Assets Noncurrent

us-gaap:OtherAssetsNoncurrent

us-gaap:OtherAssetsNoncurrent


Other
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302014-12-31
Value3483503313863823463112442473071621059383717475215241504754356079
Percentage of OtherAssetsNoncurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets0.90.90.91.11.11.00.90.70.70.90.50.30.30.30.20.20.20.70.80.20.20.20.10.20.3

us-gaap:OtherAssetsNoncurrent us-gaap:ConsolidatedEntities

srt:ParentCompany


Other
Period End2020-12-312019-12-312018-12-312017-12-31
Value3.03.01.09.0
Percentage of OtherAssetsNoncurrent0.91.00.612.7
Percentage of Assets0.00.00.00.0
Percentage of Assets srt:ParentCompany0.00.00.00.1

us-gaap:OtherAssetsNoncurrent us-gaap:RestrictedCashAndCashEquivalentsCashAndCashEquivalents

agr:RestrictedCash


Other
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-03-312015-12-31
Value4.04.04.05.05.06.06.05.06.05.07.08.05.05.05.07.06.05.05.05.07.0
Percentage of OtherAssetsNoncurrent1.11.11.21.31.31.71.92.02.41.64.37.65.46.07.09.58.02.32.19.320.0
Percentage of Assets0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0
Percentage of Assets agr:RestrictedCash0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

Equity Securities Fv Ni

us-gaap:EquitySecuritiesFvNi

us-gaap:EquitySecuritiesFvNi


Equity
Period End2021-06-302021-03-312020-12-31
Value575763
Percentage of EquitySecuritiesFvNi100.0100.0100.0
Percentage of Assets0.10.20.2

us-gaap:EquitySecuritiesFvNi us-gaap:FairValueByFairValueHierarchyLevel

us-gaap:FairValueInputsLevel1


Equity
Period End2021-06-302021-03-312020-12-31
Value434349
Percentage of EquitySecuritiesFvNi75.475.477.8
Percentage of Assets0.10.10.1
Percentage of Assets us-gaap:FairValueInputsLevel10.00.00.0

Other Assets

us-gaap:OtherAssets

us-gaap:OtherAssets


Other
Period End2021-06-302021-03-312020-12-312019-12-312018-12-312017-12-312015-12-312015-09-302014-12-31
Value384338453834382836753589379520822102
Percentage of OtherAssets100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets9.910.210.111.111.411.312.38.58.7

us-gaap:OtherAssets us-gaap:ConsolidatedEntities

srt:ParentCompany


Other
Period End2020-12-312019-12-312018-12-312017-12-31
Value391377313294
Percentage of OtherAssets10.29.88.58.2
Percentage of Assets1.01.11.00.9
Percentage of Assets srt:ParentCompany1.81.91.81.7

Accounts Payable And Accrued Liabilities Current

us-gaap:AccountsPayableAndAccruedLiabilitiesCurrent

us-gaap:AccountsPayableAndAccruedLiabilitiesCurrent


Accounts
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-31
Value13481416145314811213106413611060101210841132100894092810719519019021096910814724830
Percentage of AccountsPayableAndAccruedLiabilitiesCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets3.53.73.84.23.53.14.03.23.13.33.53.23.02.93.43.02.92.93.53.02.72.42.7

us-gaap:AccountsPayableAndAccruedLiabilitiesCurrent us-gaap:ConsolidatedEntities

srt:ParentCompany


Accounts
Period End2020-12-312019-12-312018-12-312017-12-31
Value122.010.06.0
Percentage of AccountsPayableAndAccruedLiabilitiesCurrent0.80.10.90.6
Percentage of Assets0.00.00.00.0
Percentage of Assets srt:ParentCompany0.10.00.10.0

Contract With Customer Liability Current

us-gaap:ContractWithCustomerLiabilityCurrent

us-gaap:ContractWithCustomerLiabilityCurrent


Contract
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312017-12-31
Value115.09.06.0125.010.06.0125.09.08.0
Percentage of ContractWithCustomerLiabilityCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets0.00.00.00.00.00.00.00.00.00.00.00.0

Dividends Payable Current

us-gaap:DividendsPayableCurrent

us-gaap:DividendsPayableCurrent


Dividends
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-31
Value170136136136136136136136136137136136134134134133134134134
Percentage of DividendsPayableCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets0.40.40.40.40.40.40.40.40.40.40.40.40.40.40.40.40.40.40.4

us-gaap:DividendsPayableCurrent us-gaap:ConsolidatedEntities

srt:ParentCompany


Dividends
Period End2020-12-312019-12-312018-12-312017-12-31
Value136136136134
Percentage of DividendsPayableCurrent100.0100.0100.0100.0
Percentage of Assets0.40.40.40.4
Percentage of Assets srt:ParentCompany0.60.70.80.8

Liabilities Current

us-gaap:LiabilitiesCurrent

us-gaap:LiabilitiesCurrent


Liabilities
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302014-12-31
Value2958279230694184323534473587284828123153300429112340271631142934247225882712215319221821203514991773
Percentage of LiabilitiesCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets7.77.48.111.79.310.010.48.58.59.79.39.27.58.69.89.27.98.28.77.06.36.06.66.17.3

us-gaap:LiabilitiesCurrent us-gaap:ConsolidatedEntities

srt:ParentCompany


Liabilities
Period End2020-12-312019-12-312018-12-312017-12-31
Value185928881220883
Percentage of LiabilitiesCurrent60.680.540.628.4
Percentage of Assets4.98.43.82.8
Percentage of Assets srt:ParentCompany8.414.57.05.2

Long Term Debt Current

us-gaap:LongTermDebtCurrent

us-gaap:LongTermDebtCurrent


Long
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302014-12-31
Value313813523726730232374325394523362214183267307325349187168166206173148
Percentage of LongTermDebtCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets0.82.31.52.12.10.71.11.01.21.61.20.70.60.81.01.01.10.60.60.50.70.70.6

Notes Payable Current

us-gaap:NotesPayableCurrent

us-gaap:NotesPayableCurrent


Notes
Period End2020-12-312018-12-312017-12-312016-12-312015-12-31
Value307587786161163
Percentage of NotesPayableCurrent100.0100.0100.0100.0100.0
Percentage of Assets0.81.82.50.50.5

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
Value16168.011131712121110.00.0
Percentage of OperatingLeaseLiabilityCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0
Percentage of Assets0.00.00.00.00.00.00.00.00.00.00.0

Other Liabilities Current

us-gaap:OtherLiabilitiesCurrent

us-gaap:OtherLiabilitiesCurrent


Other
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302014-12-31
Value381348368296290292334318291304327325307356330316265283279258242285285257275
Percentage of OtherLiabilitiesCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets1.00.91.00.80.80.81.00.90.90.91.01.01.01.11.01.00.80.90.90.80.80.90.91.11.1

Taxes Payable Current

us-gaap:TaxesPayableCurrent

us-gaap:TaxesPayableCurrent


Taxes
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302014-12-31
Value5960738261625671566859741159896256615267505455458.0
Percentage of TaxesPayableCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets0.20.20.20.20.20.20.20.20.20.20.20.20.00.20.30.20.20.20.20.20.20.20.20.20.0

Liabilities Noncurrent

us-gaap:LiabilitiesNoncurrent

us-gaap:LiabilitiesNoncurrent


Liabilities
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302014-12-31
Value15857189841892815602157051523815243151811478013999137601338913568134481346113770137721355613475134051342413594136421025110023
Percentage of LiabilitiesNoncurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets41.050.350.043.845.144.044.345.344.642.942.842.243.242.742.543.143.743.243.043.844.144.544.442.041.3

Long Term Debt

us-gaap:LongTermDebt

us-gaap:LongTermDebt


Long
Period End2020-12-31
Value2834
Percentage of LongTermDebt100.0
Percentage of Assets7.5

Long Term Debt Noncurrent

us-gaap:LongTermDebtNoncurrent

us-gaap:LongTermDebtNoncurrent


Long
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302014-12-31
Value7274740174787081715967156716671862825487536850965261516051964767477345074510439945074519453027942516
Percentage of LongTermDebtNoncurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets18.819.619.819.920.519.419.520.019.016.816.716.016.816.416.414.915.214.414.414.414.814.814.711.510.4

us-gaap:LongTermDebtNoncurrent us-gaap:ConsolidatedEntities

srt:ParentCompany


Long
Period End2020-12-312019-12-312018-12-312017-12-31
Value2087180810491057
Percentage of LongTermDebtNoncurrent27.926.919.520.3
Percentage of Assets5.55.33.33.3
Percentage of Assets srt:ParentCompany9.49.16.06.2

Long Term Debt And Capital Lease Obligations

us-gaap:LongTermDebtAndCapitalLeaseObligations

us-gaap:LongTermDebtAndCapitalLeaseObligations


Long
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-31
Value747867165368519645104530
Percentage of LongTermDebtAndCapitalLeaseObligations100.0100.0100.0100.0100.0100.0
Percentage of Assets19.819.516.716.414.414.7

Deferred Income Tax Liabilities Net

us-gaap:DeferredIncomeTaxLiabilitiesNet

us-gaap:DeferredIncomeTaxLiabilitiesNet


Deferred
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312018-12-31
Value19751924191918461828182618141530
Percentage of DeferredIncomeTaxLiabilitiesNet100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets5.15.15.15.25.25.35.34.8

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
Value280279272321330
Percentage of PensionAndOtherPostretirementDefinedBenefitPlansLiabilitiesNoncurrent100.0100.0100.0100.0100.0
Percentage of Assets0.70.80.81.01.1
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
Value727821830728776
Percentage of PensionAndOtherPostretirementDefinedBenefitPlansLiabilitiesNoncurrent259.6294.3305.1226.8235.2
Percentage of Assets1.92.42.62.32.5
Percentage of Assets us-gaap:PensionPlansDefinedBenefit0.00.00.00.00.0

Minority Interest

us-gaap:MinorityInterest

us-gaap:MinorityInterest


Minority
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302014-12-31
Value5966116176316385823493684142982993273331481915141313131313131616
Percentage of MinorityInterest100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets1.51.61.61.81.81.71.01.11.20.90.91.01.10.50.10.00.00.00.00.00.00.00.00.10.1

Other Liabilities Noncurrent

us-gaap:OtherLiabilitiesNoncurrent

us-gaap:OtherLiabilitiesNoncurrent


Other
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302014-12-31
Value546054335313450425390380539527530499401400365360367367354342340297314330247278
Percentage of OtherLiabilitiesNoncurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets14.114.414.01.31.21.11.11.61.61.61.61.31.31.21.11.11.21.11.11.11.01.01.11.01.1

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
Value167172154424156656469730.0
Percentage of OperatingLeaseLiabilityNoncurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0
Percentage of Assets0.40.50.40.10.10.20.20.20.20.20.0

Lessee Operating Lease Liability Payments Due Year Two

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearTwo

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearTwo


Lessee
Period End2020-12-31
Value15
Percentage of LesseeOperatingLeaseLiabilityPaymentsDueYearTwo100.0
Percentage of Assets0.0

Lessee Operating Lease Liability Payments Due Year Three

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearThree

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearThree


Lessee
Period End2020-12-31
Value13
Percentage of LesseeOperatingLeaseLiabilityPaymentsDueYearThree100.0
Percentage of Assets0.0

Lessee Operating Lease Liability Payments Due Year Four

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearFour

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearFour


Lessee
Period End2020-12-31
Value10000000.0
Percentage of LesseeOperatingLeaseLiabilityPaymentsDueYearFour100.0
Percentage of Assets0.0

Lessee Operating Lease Liability Payments Due Year Five

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearFive

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearFive


Lessee
Period End2020-12-31
Value10000000.0
Percentage of LesseeOperatingLeaseLiabilityPaymentsDueYearFive100.0
Percentage of Assets0.0

Lessee Operating Lease Liability Payments Due After Year Five

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueAfterYearFive

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueAfterYearFive


Lessee
Period End2020-12-31
Value182
Percentage of LesseeOperatingLeaseLiabilityPaymentsDueAfterYearFive100.0
Percentage of Assets0.5

Operating Lease Liability

us-gaap:OperatingLeaseLiability

us-gaap:OperatingLeaseLiability


Operating
Period End2020-12-312019-12-312019-09-302019-06-30
Value162777680
Percentage of OperatingLeaseLiability100.0100.0100.0100.0
Percentage of Assets0.40.20.20.2

Lessee Operating Lease Liability Payments Due

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDue

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDue


Lessee
Period End2020-12-31
Value245
Percentage of LesseeOperatingLeaseLiabilityPaymentsDue100.0
Percentage of Assets0.6

Lessee Operating Lease Liability Undiscounted Excess Amount

us-gaap:LesseeOperatingLeaseLiabilityUndiscountedExcessAmount

us-gaap:LesseeOperatingLeaseLiabilityUndiscountedExcessAmount


Lessee
Period End2020-12-31
Value83
Percentage of LesseeOperatingLeaseLiabilityUndiscountedExcessAmount100.0
Percentage of Assets0.2

Stockholders Equity

us-gaap:StockholdersEquity

us-gaap:StockholdersEquity


Stockholders
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302014-12-31
Value19239153811520915223152781532615237151501513515158151041512815135151711507715202152271523915109150381505215111150531263112440
Percentage of StockholdersEquity100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets49.840.740.242.743.844.344.345.245.746.547.047.648.248.247.647.648.448.548.349.149.549.549.051.851.3

Stockholders Equity Including Portion Attributable To Noncontrolling Interest

us-gaap:StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest

us-gaap:StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest


Stockholders
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302013-12-312012-12-31
Value198351599215826158541591615908155861551815549154561540315455154681531915096152171524115252151221505115065151241506612647125971258412456123581203011348
Percentage of StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets51.342.341.844.545.746.045.346.346.947.447.948.749.348.747.747.748.448.648.349.249.549.549.051.80.040.951.451.051.90.0

us-gaap:StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest us-gaap:ConsolidatedEntities

srt:ParentCompany


Stockholders
Period End2020-12-312019-12-312018-12-312017-12-31
Value15209152371510415077
Percentage of StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest96.197.898.199.9
Percentage of Assets40.244.347.047.6
Percentage of Assets srt:ParentCompany68.676.486.988.6

us-gaap:StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest us-gaap:StatementEquityComponents

agr:AccumulatedNetGainLossfromCashFlowHedgesAttributabletoParentReclassificationtoNetIncomeGainLossesonCashFlowHedges


Stockholders
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312017-12-312016-12-31
Value-39.0-43.0-44.0-51.0-60.0-61.0-63.0-66.0-71.0-72.0-64.0-56.0-70.0
Percentage of StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest-0.2-0.3-0.3-0.3-0.4-0.4-0.4-0.4-0.5-0.5-0.4-0.4-0.5
Percentage of Assets-0.1-0.1-0.1-0.1-0.2-0.2-0.2-0.2-0.2-0.2-0.2-0.2-0.2
Percentage of Assets agr:AccumulatedNetGainLossfromCashFlowHedgesAttributabletoParentReclassificationtoNetIncomeGainLossesonCashFlowHedges0.00.00.00.00.00.00.00.00.00.00.00.00.0

agr:AccumulatedNetGainLossfromCashFlowHedgesAttributabletoParentUnrealizedGainLossesonDerivativesQualifyingasCashFlowHedges


Stockholders
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312017-12-312016-12-31
Value-135.0-62.0-35.0-44.0-29.0-36.0-13.0-13.0-18.0-20.09.0305.0
Percentage of StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest-0.7-0.4-0.2-0.3-0.2-0.2-0.1-0.1-0.1-0.10.10.20.0
Percentage of Assets-0.3-0.2-0.1-0.1-0.1-0.1-0.0-0.0-0.1-0.10.00.10.0
Percentage of Assets agr:AccumulatedNetGainLossfromCashFlowHedgesAttributabletoParentUnrealizedGainLossesonDerivativesQualifyingasCashFlowHedges0.00.00.00.00.00.00.00.00.00.00.00.00.0

agr:UnrealizedGainLossFromEquityMethodInvestmentAttributableToParent


Stockholders
Period End2021-06-30
Value-3.0
Percentage of StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest-0.0
Percentage of Assets-0.0
Percentage of Assets agr:UnrealizedGainLossFromEquityMethodInvestmentAttributableToParent0.0

us-gaap:AccumulatedDefinedBenefitPlansAdjustmentNetTransitionAssetObligation


Stockholders
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312017-12-312016-12-31
Value-12.0-12.0-12.0-12.0-12.0-12.0-12.0-13.0-13.0-13.0-11.0-14.0-14.0
Percentage of StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest-0.1-0.1-0.1-0.1-0.1-0.1-0.1-0.1-0.1-0.1-0.1-0.1-0.1
Percentage of Assets-0.0-0.0-0.0-0.0-0.0-0.0-0.0-0.0-0.0-0.0-0.0-0.0-0.0
Percentage of Assets us-gaap:AccumulatedDefinedBenefitPlansAdjustmentNetTransitionAssetObligation0.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:AccumulatedDefinedBenefitPlansAdjustmentNetUnamortizedGainLoss


Stockholders
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312017-12-312016-12-31
Value-20.0-20.0-20.0-7.0-7.0-7.0-7.0-7.0-7.0-6.0-6.0-6.0-7.0
Percentage of StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest-0.1-0.1-0.1-0.0-0.0-0.0-0.0-0.0-0.0-0.0-0.0-0.0-0.0
Percentage of Assets-0.1-0.1-0.1-0.0-0.0-0.0-0.0-0.0-0.0-0.0-0.0-0.0-0.0
Percentage of Assets us-gaap:AccumulatedDefinedBenefitPlansAdjustmentNetUnamortizedGainLoss0.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:AccumulatedGainLossNetCashFlowHedgeParent


Stockholders
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-31
Value-95.0-89.0-97.0-76.0-79.0-89.0-92.0-55.0
Percentage of StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest-0.6-0.6-0.6-0.5-0.5-0.6-0.6-0.4
Percentage of Assets-0.3-0.3-0.3-0.2-0.2-0.3-0.3-0.2
Percentage of Assets us-gaap:AccumulatedGainLossNetCashFlowHedgeParent0.00.00.00.00.00.00.00.0

us-gaap:AccumulatedNetGainLossFromDesignatedOrQualifyingCashFlowHedges


Stockholders
Period End2021-06-302021-03-312020-12-312020-06-302020-03-312019-12-312018-12-312017-12-312016-12-31
Value-174.0-105.0-79.0-89.0-97.0-76.0-55.0-26.0-65.0
Percentage of StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest-0.9-0.7-0.5-0.6-0.6-0.5-0.4-0.2-0.4
Percentage of Assets-0.5-0.3-0.2-0.3-0.3-0.2-0.2-0.1-0.2
Percentage of Assets us-gaap:AccumulatedNetGainLossFromDesignatedOrQualifyingCashFlowHedges0.00.00.00.00.00.00.00.00.0

us-gaap:AccumulatedOtherComprehensiveIncome


Stockholders
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302013-12-312012-12-31
Value-209.0-137.0-111.0-114.0-108.0-116.0-95.0-99.0-109.0-111.0-72.0-55.0-61.0-57.0-46.0-54.0-62.0-61.0-86.0-84.0-94.0-72.0-52.0-79.0-96.0-98.0-99.0-95.0-100.0-107.0
Percentage of StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest-1.1-0.9-0.7-0.7-0.7-0.7-0.6-0.6-0.7-0.7-0.5-0.4-0.4-0.4-0.3-0.4-0.4-0.4-0.6-0.6-0.6-0.5-0.3-0.6-0.8-0.8-0.8-0.8-0.8-0.9
Percentage of Assets-0.5-0.4-0.3-0.3-0.3-0.3-0.3-0.3-0.3-0.3-0.2-0.2-0.2-0.2-0.1-0.2-0.2-0.2-0.3-0.3-0.3-0.2-0.2-0.30.0-0.3-0.4-0.4-0.40.0
Percentage of Assets us-gaap:AccumulatedOtherComprehensiveIncome0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:AdditionalPaidInCapital


Stockholders
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302013-12-312012-12-31
Value176711366713665136641366413667136601365913659136581365713656136551365413653136561365513653136531365213651136531365311378113751137511378113781137810629
Percentage of StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest89.185.586.386.285.985.987.688.087.888.488.788.488.389.190.489.789.689.590.390.790.690.390.690.090.390.491.392.194.693.7
Percentage of Assets45.736.236.138.339.239.539.740.741.241.942.543.043.543.443.142.843.443.543.644.644.944.744.446.60.037.046.946.949.10.0
Percentage of Assets us-gaap:AdditionalPaidInCapital0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:NoncontrollingInterest


Stockholders
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302013-12-312012-12-31
Value59661161763163858234936841429829932733314819151413131313131316161616111514
Percentage of StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest3.03.83.94.04.03.72.22.42.71.91.92.12.21.00.10.10.10.10.10.10.10.10.10.10.10.10.10.10.10.1
Percentage of Assets1.51.61.61.81.81.71.01.11.20.90.91.01.10.50.10.00.00.00.00.00.00.00.00.10.00.10.10.00.10.0
Percentage of Assets us-gaap:NoncontrollingInterest0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:Parent


Stockholders
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312013-12-312012-12-31
Value1923915381152091522315278153261523715150151351515815104151281513515171150771520215227152391510915038150521511115053126521258112568124611203611334
Percentage of StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest97.096.296.196.096.096.397.897.697.398.198.197.997.899.099.999.999.999.999.999.999.999.999.9100.099.999.9100.0100.099.9
Percentage of Assets49.840.740.242.743.844.344.345.245.746.547.047.648.248.247.647.648.448.548.349.149.549.549.051.90.040.951.451.90.0
Percentage of Assets us-gaap:Parent0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:RetainedEarnings


Stockholders
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302013-12-312012-12-31
Value1790186416661684173317841681159915941620152815361550157914751605163916491544147114961527144913321299128811611064737809
Percentage of StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest9.011.710.510.610.911.210.810.310.310.59.99.910.010.39.810.510.810.810.29.89.910.19.610.510.310.29.38.66.17.1
Percentage of Assets4.64.94.44.75.05.24.94.84.85.04.84.84.95.04.75.05.25.34.94.84.95.04.75.50.04.24.84.43.20.0
Percentage of Assets us-gaap:RetainedEarnings0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:TreasuryStock


Stockholders
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302015-12-31
Value-16.0-16.0-14.0-14.0-14.0-12.0-12.0-12.0-12.0-12.0-12.0-12.0-12.0-8.0-8.0-8.0-8.0-5.0-5.0-4.0-4.00.0
Percentage of StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest-0.1-0.1-0.1-0.1-0.1-0.1-0.1-0.1-0.1-0.1-0.1-0.1-0.1-0.1-0.1-0.1-0.1-0.0-0.0-0.0-0.00.0
Percentage of Assets-0.0-0.0-0.0-0.0-0.0-0.0-0.0-0.0-0.0-0.0-0.0-0.0-0.0-0.0-0.0-0.0-0.0-0.0-0.0-0.0-0.00.0
Percentage of Assets us-gaap:TreasuryStock0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

Common Stock Value

us-gaap:CommonStockValue

us-gaap:CommonStockValue


Common
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302014-12-31
Value3000000.03000000.03000000.03000000.03000000.03000000.03000000.03000000.03000000.03000000.03000000.03000000.03000000.03000000.03000000.03000000.03000000.03000000.03000000.03000000.03000000.03000000.03000000.000
Percentage of CommonStockValue100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.00.0
Percentage of Assets0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

Additional Paid In Capital Common Stock

us-gaap:AdditionalPaidInCapitalCommonStock

us-gaap:AdditionalPaidInCapitalCommonStock


Additional
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302014-12-31
Value17671136671366513664136641366713660136591365913658136571365613655136541365313656136551365313653136521365113653136531137811378
Percentage of AdditionalPaidInCapitalCommonStock100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets45.736.236.138.339.239.539.740.741.241.942.543.043.543.443.142.843.443.543.644.644.944.744.446.646.9

us-gaap:AdditionalPaidInCapitalCommonStock us-gaap:ConsolidatedEntities

srt:ParentCompany


Additional
Period End2020-12-312019-12-312018-12-312017-12-31
Value13665136601365713653
Percentage of AdditionalPaidInCapitalCommonStock100.0100.0100.0100.0
Percentage of Assets36.139.742.543.1
Percentage of Assets srt:ParentCompany61.768.578.680.2

Retained Earnings Accumulated Deficit

us-gaap:RetainedEarningsAccumulatedDeficit

us-gaap:RetainedEarningsAccumulatedDeficit


Retained
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302014-12-31
Value1790186416661684173317841681159915941620152815361550157914751605163916491544147114961527144913321161
Percentage of RetainedEarningsAccumulatedDeficit100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets4.64.94.44.75.05.24.94.84.85.04.84.84.95.04.75.05.25.34.94.84.95.04.75.54.8

us-gaap:RetainedEarningsAccumulatedDeficit us-gaap:ConsolidatedEntities

srt:ParentCompany


Retained
Period End2020-12-312019-12-312018-12-312017-12-31
Value1666168115281475
Percentage of RetainedEarningsAccumulatedDeficit100.0100.0100.0100.0
Percentage of Assets4.44.94.84.7
Percentage of Assets srt:ParentCompany7.58.48.88.7

Accumulated Other Comprehensive Income Loss Net Of Tax

us-gaap:AccumulatedOtherComprehensiveIncomeLossNetOfTax

us-gaap:AccumulatedOtherComprehensiveIncomeLossNetOfTax


Accumulated
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302013-12-312012-12-31
Value-209000000.0-137000000.0-111000000.0-114000000.0-108000000.0-116000000.0-95000000.0-99000000.0-109000000.0-111000000.0-72000000.0-55000000.0-61000000.0-57000000.0-46000000.0-54000000.0-62000000.0-61000000.0-86000000.0-84000000.0-94000000.0-72000000.0-52000000.0-79000000.0-96000000.0-98000000.0-99000000.0-95000000.0-96000000.0-100000000.0-107000000.0
Percentage of AccumulatedOtherComprehensiveIncomeLossNetOfTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets-0.5-0.4-0.3-0.3-0.3-0.3-0.3-0.3-0.3-0.3-0.2-0.2-0.2-0.2-0.1-0.2-0.2-0.2-0.3-0.3-0.3-0.2-0.2-0.30.0-0.3-0.4-0.40.0-0.40.0

us-gaap:AccumulatedOtherComprehensiveIncomeLossNetOfTax us-gaap:ConsolidatedEntities

srt:ParentCompany


Accumulated
Period End2020-12-312019-12-312018-12-312017-12-31
Value-111000000.0-95000000.0-72000000.0-46000000.0
Percentage of AccumulatedOtherComprehensiveIncomeLossNetOfTax100.0100.0100.0100.0
Percentage of Assets-0.3-0.3-0.2-0.1
Percentage of Assets srt:ParentCompany-0.5-0.5-0.4-0.3

Minority Interest

us-gaap:MinorityInterest

us-gaap:MinorityInterest


Minority
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302014-12-31
Value5966116176316385823493684142982993273331481915141313131313131616
Percentage of MinorityInterest100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets1.51.61.61.81.81.71.01.11.20.90.91.01.10.50.10.00.00.00.00.00.00.00.00.10.1

Stock Issued During Period Value New Issues

us-gaap:StockIssuedDuringPeriodValueNewIssues

us-gaap:StockIssuedDuringPeriodValueNewIssues


Stock
Period End2021-06-302021-03-312020-09-302020-06-302018-09-302017-03-312016-09-30
Value3999-1.00.0-1.00.01.00.0
Percentage of StockIssuedDuringPeriodValueNewIssues100.0100.00.0100.00.0100.00.0
Percentage of Assets0.00.00.00.00.00.00.0

us-gaap:StockIssuedDuringPeriodValueNewIssues us-gaap:StatementEquityComponents

us-gaap:AdditionalPaidInCapital


Stock
Period End2021-06-302021-03-312020-09-302020-06-302018-09-302017-03-312016-09-30
Value3999-1.00.0-1.00.01.00.0
Percentage of StockIssuedDuringPeriodValueNewIssues100.0100.00.0100.00.0100.00.0
Percentage of Assets0.00.00.00.00.00.00.0
Percentage of Assets us-gaap:AdditionalPaidInCapital0.00.00.00.00.00.00.0

us-gaap:Parent


Stock
Period End2021-06-302021-03-312020-09-302020-06-302018-09-302017-03-312016-09-30
Value3999-1.00.0-1.00.01.00.0
Percentage of StockIssuedDuringPeriodValueNewIssues100.0100.00.0100.00.0100.00.0
Percentage of Assets0.00.00.00.00.00.00.0
Percentage of Assets us-gaap:Parent0.00.00.00.00.00.00.0

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

us-gaap:AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue

us-gaap:AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue


Adjustments
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-31
Value5000000.03000000.01000000.00-2000000.07000000.01000000.001000000.01000000.01000000.01000000.01000000.0-11000000.0-3000000.01000000.02000000.01000000.01000000.0
Percentage of AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue100.0100.0100.00.0100.0100.0100.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue us-gaap:StatementEquityComponents

us-gaap:AdditionalPaidInCapital


Adjustments
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302017-12-312017-09-302017-06-302017-03-312016-12-31
Value5000000.03000000.01000000.00-2000000.07000000.01000000.001000000.01000000.01000000.01000000.01000000.0-3000000.01000000.02000000.01000000.01000000.0
Percentage of AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue100.0100.0100.00.0100.0100.0100.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0
Percentage of Assets us-gaap:AdditionalPaidInCapital0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:Parent


Adjustments
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302017-12-312017-09-302017-06-302017-03-312016-12-31
Value5000000.03000000.01000000.00-2000000.07000000.01000000.001000000.01000000.01000000.01000000.01000000.0-3000000.01000000.02000000.01000000.01000000.0
Percentage of AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue100.0100.0100.00.0100.0100.0100.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0
Percentage of Assets us-gaap:Parent0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

Minority Interest Decrease From Distributions To Noncontrolling Interest Holders

us-gaap:MinorityInterestDecreaseFromDistributionsToNoncontrollingInterestHolders

us-gaap:MinorityInterestDecreaseFromDistributionsToNoncontrollingInterestHolders


Minority
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
Value2.03.00.01.03.01.016377.03.016193011
Percentage of MinorityInterestDecreaseFromDistributionsToNoncontrollingInterestHolders100.0100.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets0.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:MinorityInterestDecreaseFromDistributionsToNoncontrollingInterestHolders us-gaap:StatementEquityComponents

us-gaap:NoncontrollingInterest


Minority
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
Value2.03.00.01.03.01.012377.03.016193011
Percentage of MinorityInterestDecreaseFromDistributionsToNoncontrollingInterestHolders100.0100.00.0100.0100.0100.075.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets0.00.00.00.00.00.00.00.00.00.00.00.00.00.0
Percentage of Assets us-gaap:NoncontrollingInterest0.00.00.00.00.00.00.00.00.00.00.00.00.00.0

Net Cash Provided By Used In Operating Activities

us-gaap:NetCashProvidedByUsedInOperatingActivities

us-gaap:NetCashProvidedByUsedInOperatingActivities


Net
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-30
Value426425196208577307349427502315474334386597441397
Percentage of NetCashProvidedByUsedInOperatingActivities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax28.622.012.314.842.918.621.731.138.017.828.523.930.935.128.829.6

Net Cash Provided By Used In Investing Activities

us-gaap:NetCashProvidedByUsedInInvestingActivities

us-gaap:NetCashProvidedByUsedInInvestingActivities


Net
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-30
Value-362.0-639.0-902.0-604.0-603.0-749.0-557.0-704.0-926.0-526.0-531.0-427.0-283.0-323.0-674.0-622.0
Percentage of NetCashProvidedByUsedInInvestingActivities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax-24.3-33.0-56.7-43.0-44.8-45.3-34.6-51.3-70.0-29.8-31.9-30.6-22.7-19.0-44.0-46.4

Net Cash Provided By Used In Financing Activities

us-gaap:NetCashProvidedByUsedInFinancingActivities

us-gaap:NetCashProvidedByUsedInFinancingActivities


Net
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-30
Value852-436.02067451452902842135582066076-91.0-275.0245217
Percentage of NetCashProvidedByUsedInFinancingActivities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax57.2-22.5130.032.13.317.617.715.542.211.73.65.4-7.3-16.216.016.2

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

us-gaap:CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect

us-gaap:CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect


Cash
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-31
Value916-650.013615519-152.076-64.0134-5.0
Percentage of CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax61.5-33.685.63.91.4-9.24.7-4.710.1-0.3

Net Cash Provided By Used In Operating Activities

us-gaap:NetCashProvidedByUsedInOperatingActivities

us-gaap:NetCashProvidedByUsedInOperatingActivities


Net
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-30
Value426425196208577307349427502315474334386597441397
Percentage of NetCashProvidedByUsedInOperatingActivities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax28.622.012.314.842.918.621.731.138.017.828.523.930.935.128.829.6

Net Income Loss

us-gaap:NetIncomeLoss

us-gaap:NetIncomeLoss


Net
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-31
Value983341668788240223150110217119125107244-77.099120239207109102212965411106976463200
Percentage of NetIncomeLoss100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax6.617.310.46.26.514.513.910.98.312.37.19.08.614.3-5.07.49.013.613.97.77.112.78.35.21.28.68.76.56.712.9

Profit Loss

us-gaap:ProfitLoss

us-gaap:ProfitLoss


Profit
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-31
Value843211528176230216139105216116134110238-77.0100120239207109102212965411106976462201
Percentage of ProfitLoss100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax5.616.69.65.85.713.913.410.17.912.27.09.68.814.0-5.07.59.013.613.97.77.112.78.35.21.28.68.76.56.612.9

us-gaap:ProfitLoss us-gaap:StatementEquityComponents

us-gaap:NoncontrollingInterest


Profit
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-30
Value-14.0-13.0-14.0-6.0-12.0-10.0-7.0-11.0-5.0-1.0-3.09.03.0-6.00.01.0
Percentage of ProfitLoss-16.7-4.0-9.2-7.4-15.8-4.3-3.2-7.9-4.8-0.5-2.66.72.7-2.5-0.01.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax-0.9-0.7-0.9-0.4-0.9-0.6-0.4-0.8-0.4-0.1-0.20.60.2-0.40.00.1
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:NoncontrollingInterest0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:Parent


Profit
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-31
Value983341668788240223150110217119125107244-77.099120239207109102212965411106
Percentage of ProfitLoss116.7104.0109.2107.4115.8104.3103.2107.9104.8100.5102.693.397.3102.5100.099.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax6.617.310.46.26.514.513.910.98.312.37.19.08.614.3-5.07.49.013.613.97.77.112.78.35.21.28.6
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:Parent0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:RetainedEarnings


Profit
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-31
Value983341668788240223150110217119125107244-77.099120239207109102212965411106
Percentage of ProfitLoss116.7104.0109.2107.4115.8104.3103.2107.9104.8100.5102.693.397.3102.5100.099.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax6.617.310.46.26.514.513.910.98.312.37.19.08.614.3-5.07.49.013.613.97.77.112.78.35.21.28.6
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:RetainedEarnings0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

Net Cash Provided By Used In Investing Activities

us-gaap:NetCashProvidedByUsedInInvestingActivities

us-gaap:NetCashProvidedByUsedInInvestingActivities


Net
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-30
Value-362.0-639.0-902.0-604.0-603.0-749.0-557.0-704.0-926.0-526.0-531.0-427.0-283.0-323.0-674.0-622.0
Percentage of NetCashProvidedByUsedInInvestingActivities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax-24.3-33.0-56.7-43.0-44.8-45.3-34.6-51.3-70.0-29.8-31.9-30.6-22.7-19.0-44.0-46.4

Payments To Acquire Property Plant And Equipment

us-gaap:PaymentsToAcquirePropertyPlantAndEquipment

us-gaap:PaymentsToAcquirePropertyPlantAndEquipment


Payments
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-31
Value641623821615603742695708912425614422352399712635544525671362398276412140166364255
Percentage of PaymentsToAcquirePropertyPlantAndEquipment100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:PaymentsToAcquirePropertyPlantAndEquipment us-gaap:ConsolidationItems, us-gaap:StatementBusinessSegments

us-gaap:OperatingSegments, agr:NetworksSegment


Payments
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-31
Value440531526482393437526408354324504351240282463308267267391279264206
Percentage of PaymentsToAcquirePropertyPlantAndEquipment68.685.264.178.465.258.975.757.638.876.282.183.268.270.765.048.549.150.958.377.166.374.6

us-gaap:OperatingSegments, agr:RenewablesSegment


Payments
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value2019229513321030516630055810111071113116242
Percentage of PaymentsToAcquirePropertyPlantAndEquipment31.414.835.921.634.841.123.942.461.223.817.916.832.129.134.0

Net Cash Provided By Used In Financing Activities

us-gaap:NetCashProvidedByUsedInFinancingActivities

us-gaap:NetCashProvidedByUsedInFinancingActivities


Net
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-30
Value852-436.02067451452902842135582066076-91.0-275.0245217
Percentage of NetCashProvidedByUsedInFinancingActivities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax57.2-22.5130.032.13.317.617.715.542.211.73.65.4-7.3-16.216.016.2

Proceeds From Issuance Of Long Term Debt

us-gaap:ProceedsFromIssuanceOfLongTermDebt

us-gaap:ProceedsFromIssuanceOfLongTermDebt


Proceeds
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-30
Value4002237440.0500449994194273-1.03250.05940.0
Percentage of ProceedsFromIssuanceOfLongTermDebt100.0100.0100.00.0100.0100.0100.0100.0100.0100.0100.00.0100.00.0

Repayments Of Long Term Debt

us-gaap:RepaymentsOfLongTermDebt

us-gaap:RepaymentsOfLongTermDebt


Repayments
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302014-12-31
Value2.05008.05003.02.0150151431520.0632.024042194.0272383.04273-1.0-7.0
Percentage of RepaymentsOfLongTermDebt100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Payments Of Dividends

us-gaap:PaymentsOfDividends

us-gaap:PaymentsOfDividends


Payments
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-30
Value136136137136136136137136137135136134133134134133134134134133
Percentage of PaymentsOfDividends100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Dividends

us-gaap:Dividends

us-gaap:Dividends


Dividends
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-31
Value171136137136136136137136136136136137133134134133134134134134133134
Percentage of Dividends100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:Dividends us-gaap:StatementEquityComponents

us-gaap:Parent


Dividendsus-gaap:
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-31
Value171136137136136136137136136136136137133134134133134134134134133134
Percentage of Dividends100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:RetainedEarnings


Dividendsus-gaap:
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-31
Value171136137136136136137136136136136137133134134133134134134134133134
Percentage of Dividends100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Payments For Repurchase Of Common Stock

us-gaap:PaymentsForRepurchaseOfCommonStock

us-gaap:PaymentsForRepurchaseOfCommonStock


Payments
Period End2021-06-302021-03-312020-12-312020-09-302019-12-312019-09-302018-12-312018-09-302017-12-312017-09-302016-12-312016-09-30
Value02000000.0000000001000000.00
Percentage of PaymentsForRepurchaseOfCommonStock0.0100.00.00.00.00.00.00.00.00.0100.00.0

Debt Instrument Interest Rate Stated Percentage

us-gaap:DebtInstrumentInterestRateStatedPercentage us-gaap:ConsolidatedEntities, us-gaap:DebtInstrument, us-gaap:LongtermDebtType

us-gaap:DebtInstrumentInterestRateStatedPercentage

srt:ParentCompany, agr:IberdrolaLoan, us-gaap:SubordinatedDebt


Debt
Period End2020-12-14
Value0.2
Percentage of DebtInstrumentInterestRateStatedPercentage100.0
Percentage of LongTermDebtAndCapitalLeaseObligations0.0
Percentage of LongTermDebtAndCapitalLeaseObligations srt:ParentCompany agr:IberdrolaLoan us-gaap:SubordinatedDebt0.0

us-gaap:DebtInstrumentInterestRateStatedPercentage us-gaap:ConsolidatedEntities, us-gaap:Range, us-gaap:DebtInstrument, us-gaap:LongtermDebtType

srt:ParentCompany, srt:Maximum, agr:IberdrolaLoan, us-gaap:SubordinatedDebt


Debt
Period End2020-12-14
Value0.25
Percentage of DebtInstrumentInterestRateStatedPercentage125.0
Percentage of LongTermDebtAndCapitalLeaseObligations0.0
Percentage of LongTermDebtAndCapitalLeaseObligations srt:ParentCompany srt:Maximum agr:IberdrolaLoan us-gaap:SubordinatedDebt0.0

Effective Income Tax Rate Continuing Operations

us-gaap:EffectiveIncomeTaxRateContinuingOperations

us-gaap:EffectiveIncomeTaxRateContinuingOperations


Effective
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-312017-09-302016-06-302015-06-30
Value10.64.215.6-0.0860.050.1920.2160.160.1780.1970.2320.2420.3170.312
Percentage of EffectiveIncomeTaxRateContinuingOperations100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Deferred Tax Liabilities

us-gaap:DeferredTaxLiabilities

us-gaap:DeferredTaxLiabilities


Deferred
Period End2020-12-312019-12-312018-12-31
Value451743204057
Percentage of DeferredTaxLiabilities100.0100.0100.0

Deferred Tax Assets Net

us-gaap:DeferredTaxAssetsNet

us-gaap:DeferredTaxAssetsNet


Deferred
Period End2020-12-312019-12-312018-12-31
Value259825062533
Percentage of DeferredTaxAssetsNet100.0100.0100.0

Unrecognized Tax Benefits

us-gaap:UnrecognizedTaxBenefits

us-gaap:UnrecognizedTaxBenefits


Unrecognized
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-31
Value127148153454036384191
Percentage of UnrecognizedTaxBenefits100.0100.0100.0100.0100.0100.0100.0100.0100.0

Deferred Tax Assets Valuation Allowance

us-gaap:DeferredTaxAssetsValuationAllowance

us-gaap:DeferredTaxAssetsValuationAllowance


Deferred
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-31
Value81332321311917
Percentage of DeferredTaxAssetsValuationAllowance100.0100.0100.0100.0100.0100.0100.0

agr:AcceleratedDepreciationFromRepowering

agr:AcceleratedDepreciationFromRepowering


Accelerated
Period End2020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-09-302018-06-30
Value3.0-4.010.05.05.05.00.00.0
Percentage of AcceleratedDepreciationFromRepowering100.0100.0100.0100.0100.0100.00.00.0

agr:AdjustedNetIncome

agr:AdjustedNetIncome


Adjusted
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-30
Value12235419110098236231123101219173139128243188125143
Percentage of AdjustedNetIncome100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

agr:AdjustedNetIncome us-gaap:ConsolidationItems

agr:CorporateAndEliminations


Adjusted
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-31
Value-26.02.0-5.0-31.0-14.0-8.013-12.0-29.013
Percentage of AdjustedNetIncome-21.30.6-2.6-31.0-14.3-3.45.6-9.8-28.75.9

agr:AdjustedNetIncome us-gaap:ConsolidationItems, us-gaap:StatementBusinessSegments

us-gaap:OperatingSegments, agr:NetworksSegment


Adjusted
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-30
Value10822918999821981118966201110967920113310696
Percentage of AdjustedNetIncome88.564.799.099.083.783.948.172.465.391.863.669.161.782.770.784.867.1

us-gaap:OperatingSegments, agr:RenewablesSegment


Adjusted
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-30
Value411237.032304610846645.0383368476.017
Percentage of AdjustedNetIncome33.634.73.732.030.619.546.837.463.42.322.023.753.119.33.213.6

agr:AlternativeRevenuePrograms

agr:AlternativeRevenuePrograms


Alternative
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
Value2247482429562713191614222519
Percentage of AlternativeRevenuePrograms100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

agr:AlternativeRevenuePrograms us-gaap:StatementBusinessSegments

agr:NetworksSegment


Alternative
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
Value2247482429562713191614222519
Percentage of AlternativeRevenuePrograms100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

agr:AmortizationOfRegulatoryAssetsLiabilities

agr:AmortizationOfRegulatoryAssetsLiabilities


Amortization
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-31
Value1321-76.02421181319181410.02015199.010.09.019-80.0464241282658-11.0
Percentage of AmortizationOfRegulatoryAssetsLiabilities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

agr:AmountOfApprovedReturnOnEquityYearOne dei:LegalEntity

agr:AmountOfApprovedReturnOnEquityYearOne

agr:SouthernConnecticutGasCompanySCG


Amount
Period End2020-09-302020-06-302020-03-312019-09-30
Value0500000.01500000.00
Percentage of AmountOfApprovedReturnOnEquityYearOne0.0100.0100.00.0

agr:AmountOfApprovedReturnOnEquityYearTwo dei:LegalEntity

agr:AmountOfApprovedReturnOnEquityYearTwo

agr:SouthernConnecticutGasCompanySCG


Amount
Period End2020-09-302020-06-302020-03-312019-09-30
Value0300000.04700000.00
Percentage of AmountOfApprovedReturnOnEquityYearTwo0.0100.0100.00.0

agr:AmountOfCommitmentFundedToDate dei:LegalEntity, us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName

agr:AmountOfCommitmentFundedToDate

agr:AvangridRenewables, agr:VineyardWindLimitedLiabilityCompany


Amount
Period End2020-12-31
Value33
Percentage of AmountOfCommitmentFundedToDate100.0

agr:BusinessCombinationMergerRelatedRateCredits us-gaap:BusinessAcquisition

agr:BusinessCombinationMergerRelatedRateCredits

agr:UILHoldingsCorporation


Business
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-31
Value0.01.00.01.00.01.00.01.00.01.00.01.01.01.00.00.00.02.00.00.00.020
Percentage of BusinessCombinationMergerRelatedRateCredits0.0100.00.0100.00.0100.00.0100.00.0100.00.0100.0100.0100.00.00.00.0100.00.00.00.0100.0

agr:ChangeInFairValueOfDerivativeInstrumentsDueToMarkToMarketAdjustmentRenewables

agr:ChangeInFairValueOfDerivativeInstrumentsDueToMarkToMarketAdjustmentRenewables


Change
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-30
Value2120147.02.0-18.0-10.0-42.0-20.0-3.01610.02.0-4.0174.07.0
Percentage of ChangeInFairValueOfDerivativeInstrumentsDueToMarkToMarketAdjustmentRenewables100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

agr:ChangesInFairValueDerivativesRecognizedInRegulatoryAssetsAndLiabilitiesNet

agr:ChangesInFairValueDerivativesRecognizedInRegulatoryAssetsAndLiabilitiesNet


Changes
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-31
Value4000000.01000000.04000000.03000000.02000000.0-3000000.03000000.01000000.02000000.0-2000000.01000000.02000000.03000000.0-11000000.0-21000000.02000000.07000000.0-5000000.010000000.04000000.03000000.0-25000000.0
Percentage of ChangesInFairValueDerivativesRecognizedInRegulatoryAssetsAndLiabilitiesNet100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

agr:CostsIncurredImpactOfCovid19

agr:CostsIncurredImpactOfCovid19


Costs
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-06-30
Value9.06.08.08.01310.00.0
Percentage of CostsIncurredImpactOfCovid19100.0100.0100.0100.0100.0100.00.0

agr:DeferredStormCostsNotIncludedInJointProposal dei:LegalEntity

agr:DeferredStormCostsNotIncludedInJointProposal

agr:NewYorkStateElectricAndGasCorporation


Deferred
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-31
Value41191364.0-51.0-1.0144
Percentage of DeferredStormCostsNotIncludedInJointProposal100.0100.0100.0100.0100.0100.0100.0

agr:RochesterGasAndElectricCorporation


Deferred
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-31
Value0.01.060-12.0-13.03.049
Percentage of DeferredStormCostsNotIncludedInJointProposal0.05.344.1-300.025.5-300.034.0

agr:DerivativeRevenue

agr:DerivativeRevenue


Derivative
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-63.0-31.0252516707184484119402253
Percentage of DerivativeRevenue100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

agr:DerivativeRevenue us-gaap:StatementBusinessSegments

agr:RenewablesSegment


Derivative
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-63.0-31.0252516707184484119402243
Percentage of DerivativeRevenue100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.081.1

agr:DisposalGroupNotDiscontinuedOperationGainLossOnDisposalNetOfTax us-gaap:DisposalGroupClassification, us-gaap:IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperations

agr:DisposalGroupNotDiscontinuedOperationGainLossOnDisposalNetOfTax

us-gaap:DisposalGroupDisposedOfBySaleNotDiscontinuedOperations, agr:SolarProjectsInNevada


Disposal
Period End2021-05-13
Value3000000.0
Percentage of DisposalGroupNotDiscontinuedOperationGainLossOnDisposalNetOfTax100.0

agr:EquityMethodInvestmentContributionAmount us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName, us-gaap:StatementBusinessSegments

agr:EquityMethodInvestmentContributionAmount

agr:NewYorkTransco, agr:NetworksSegment


Equity
Period End2020-09-30
Value0.0
Percentage of EquityMethodInvestmentContributionAmount0.0

agr:SecondOffshoreDevelopmentProject, agr:RenewablesSegment


Equity
Period End2020-09-30
Value2.0
Percentage of EquityMethodInvestmentContributionAmount0.0

agr:VineyardWindLLC, agr:RenewablesSegment


Equity
Period End2021-06-302021-03-312020-12-312020-09-30
Value27281958.0
Percentage of EquityMethodInvestmentContributionAmount0.00.00.00.0

agr:FairValueNetDerivativeAssetLiabilityMeasuredOnRecurringBasisUnobservableInputsReconciliationGainIncludedInEarnings

agr:FairValueNetDerivativeAssetLiabilityMeasuredOnRecurringBasisUnobservableInputsReconciliationGainIncludedInEarnings


Fair
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-31
Value2411-2.02.04.013113814257.00.09.05.0-2.09.0-1.01210.014409.0-5.0-4.03111
Percentage of FairValueNetDerivativeAssetLiabilityMeasuredOnRecurringBasisUnobservableInputsReconciliationGainIncludedInEarnings100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

agr:FairValueNetDerivativeAssetLiabilityMeasuredOnRecurringBasisUnobservableInputsReconciliationGainIncludedInOtherComprehensiveIncomeLoss

agr:FairValueNetDerivativeAssetLiabilityMeasuredOnRecurringBasisUnobservableInputsReconciliationGainIncludedInOtherComprehensiveIncomeLoss


Fair
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-31
Value0.01.0-1.00.01.01.02.0121.01.00.00.02.00.00.01.00.01.0-1.01.00.01.0-4.03.02.01.0
Percentage of FairValueNetDerivativeAssetLiabilityMeasuredOnRecurringBasisUnobservableInputsReconciliationGainIncludedInOtherComprehensiveIncomeLoss0.0100.0100.00.0100.0100.0100.0100.0100.0100.00.00.0100.00.00.0100.00.0100.0100.0100.00.0100.0100.0100.0100.0100.0

agr:FairValueNetDerivativeAssetLiabilityMeasuredOnRecurringBasisUnobservableInputsReconciliationLossIncludedInEarnings

agr:FairValueNetDerivativeAssetLiabilityMeasuredOnRecurringBasisUnobservableInputsReconciliationLossIncludedInEarnings


Fair
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-06-302016-03-312015-12-312015-09-302015-06-302015-03-31
Value154.0-2.0-9.03.010.0-3.0220.0131.05.02.04.0-2.00.02.02.0-5.06.00.07.04.01.0
Percentage of FairValueNetDerivativeAssetLiabilityMeasuredOnRecurringBasisUnobservableInputsReconciliationLossIncludedInEarnings100.0100.0100.0100.0100.0100.0100.0100.00.0100.0100.0100.0100.0100.0100.00.0100.0100.0100.0100.00.0100.0100.0100.0

agr:FairValueNetDerivativeAssetLiabilityMeasuredOnRecurringBasisUnobservableInputsReconciliationLossIncludedInOtherComprehensiveIncomeLoss

agr:FairValueNetDerivativeAssetLiabilityMeasuredOnRecurringBasisUnobservableInputsReconciliationLossIncludedInOtherComprehensiveIncomeLoss


Fair
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-03-312015-12-312015-09-30
Value3017-4.01.01.05.01.00.00.0154.01.00.02.00.00.01.01.01.0
Percentage of FairValueNetDerivativeAssetLiabilityMeasuredOnRecurringBasisUnobservableInputsReconciliationLossIncludedInOtherComprehensiveIncomeLoss100.0100.0100.0100.0100.0100.0100.00.00.0100.0100.0100.00.0100.00.00.0100.0100.0100.0

agr:GainLossOnDispositionOfBusinessNetOfTax us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName, us-gaap:DisposalGroupClassification

agr:GainLossOnDispositionOfBusinessNetOfTax

agr:SouthDakotaWindFarmTatanka, us-gaap:DisposalGroupDisposedOfBySaleNotDiscontinuedOperations


Gain
Period End2020-12-16
Value12
Percentage of GainLossOnDispositionOfBusinessNetOfTax100.0

agr:GainLossOnDispositionOfBusinessNetOfTaxRelatedToRemeasurementOfRetainedInvestment us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName, us-gaap:DisposalGroupClassification

agr:GainLossOnDispositionOfBusinessNetOfTaxRelatedToRemeasurementOfRetainedInvestment

agr:SouthDakotaWindFarmTatanka, us-gaap:DisposalGroupDisposedOfBySaleNotDiscontinuedOperations


Gain
Period End2020-12-16
Value4.0
Percentage of GainLossOnDispositionOfBusinessNetOfTaxRelatedToRemeasurementOfRetainedInvestment100.0

agr:PercentageOfElectricLoadObligationsUsingContractsForNYISOLocation dei:LegalEntity

agr:PercentageOfElectricLoadObligationsUsingContractsForNYISOLocation

agr:RochesterGasAndElectricCorporation


Percentage
Period End2021-06-302021-03-312020-12-31
Value070.00
Percentage of PercentageOfElectricLoadObligationsUsingContractsForNYISOLocation0.0100.00.0

agr:PercentageOfReturnOnEquity dei:LegalEntity

agr:PercentageOfReturnOnEquity

agr:NYSEGandRGE


Percentage
Period End2020-11-19
Value8.8
Percentage of PercentageOfReturnOnEquity100.0

agr:PreMergerCosts

agr:PreMergerCosts


Pre
Period End2021-06-30
Value3000000.0
Percentage of PreMergerCosts100.0

agr:ProportionOfCostOrBenefitAllocatedToCustomersOnContract dei:LegalEntity, us-gaap:DerivativeInstrumentRisk

agr:ProportionOfCostOrBenefitAllocatedToCustomersOnContract

agr:TheConnecticutLightAndPowerCompany, agr:ContractsForDifferences


Proportion
Period End2021-06-302021-03-312020-12-312020-09-30
Value080.0079.2
Percentage of ProportionOfCostOrBenefitAllocatedToCustomersOnContract0.0100.00.0100.0

agr:TheUnitedIlluminatingCompany, agr:ContractsForDifferences


Proportion
Period End2021-06-302021-03-312020-12-312020-09-30
Value020.0019.8
Percentage of ProportionOfCostOrBenefitAllocatedToCustomersOnContract0.025.00.025.0

agr:ProposedWindFarmAndElectricityTransmissionProjectCapacity

agr:ProposedWindFarmAndElectricityTransmissionProjectCapacity


Proposed
Period End2021-02-05
Value688.0
Percentage of ProposedWindFarmAndElectricityTransmissionProjectCapacity100.0

agr:ProposedWindFarmandElectricityTransmissionProjectCapacity

agr:ProposedWindFarmandElectricityTransmissionProjectCapacity


Proposed
Period End2021-02-052020-05-082020-03-02
Value688.0681.0681.0
Percentage of ProposedWindFarmandElectricityTransmissionProjectCapacity100.0100.0100.0

agr:PublicUtilitiesNoticeOfViolationCivilPenaltyAmount

agr:PublicUtilitiesNoticeOfViolationCivilPenaltyAmount


Public
Period End2021-05-06
Value2000000.0
Percentage of PublicUtilitiesNoticeOfViolationCivilPenaltyAmount100.0

agr:PublicUtilitiesNoticeOfViolationCivilPenaltyAmount us-gaap:SubsequentEventType

us-gaap:SubsequentEvent


Public
Period End2021-07-14
Value1000000.0
Percentage of PublicUtilitiesNoticeOfViolationCivilPenaltyAmount0.0

agr:SaleOfStockConsiderationReceivedOnTransactionUsedToRepayDebt

agr:SaleOfStockConsiderationReceivedOnTransactionUsedToRepayDebt


Sale
Period End2021-05-18
Value3000
Percentage of SaleOfStockConsiderationReceivedOnTransactionUsedToRepayDebt100.0

agr:ShowCauseOrderNumberOfAllegedViolationsWithCivilActionForInjunctiveRelief

agr:ShowCauseOrderNumberOfAllegedViolationsWithCivilActionForInjunctiveRelief


Show
Period End2020-11-20
Value11000.0
Percentage of ShowCauseOrderNumberOfAllegedViolationsWithCivilActionForInjunctiveRelief100.0

agr:SiteContingencyLossExposureNotAccruedBestEstimatePreTax us-gaap:LitigationCase

agr:SiteContingencyLossExposureNotAccruedBestEstimatePreTax

agr:ComplaintTwoAndThree


Site
Period End2021-06-302021-03-312020-12-31
Value0.0170.0
Percentage of SiteContingencyLossExposureNotAccruedBestEstimatePreTax0.0100.00.0

us-gaap:AccrualForEnvironmentalLossContingenciesChargesToExpenseForNewLosses

us-gaap:AccrualForEnvironmentalLossContingenciesChargesToExpenseForNewLosses


Accrual
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302014-09-11
Value-1.0-1.01.020-1.02.00.020-2.00.00.0221.0-1.0-4.0260.00.027
Percentage of AccrualForEnvironmentalLossContingenciesChargesToExpenseForNewLosses100.0100.0100.0100.0100.0100.00.0100.0100.00.00.0100.0100.0100.0100.0100.00.00.0100.0

us-gaap:AllocatedShareBasedCompensationExpenseNetOfTax

us-gaap:AllocatedShareBasedCompensationExpenseNetOfTax


Allocated
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-312017-09-302017-06-302017-03-31
Value5.04.01.04.07.00.01.00.80.80.5-0.11.42.61.3
Percentage of AllocatedShareBasedCompensationExpenseNetOfTax100.0100.0100.0100.0100.00.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:AllowanceForDoubtfulAccountsReceivableWriteOffs

us-gaap:AllowanceForDoubtfulAccountsReceivableWriteOffs


Allowance
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-31
Value11129.010.010.01525241917
Percentage of AllowanceForDoubtfulAccountsReceivableWriteOffs100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:CashFlowHedgeGainLossToBeReclassifiedWithinTwelveMonths us-gaap:DerivativeInstrumentsGainLossByHedgingRelationship, us-gaap:StatementBusinessSegments

us-gaap:CashFlowHedgeGainLossToBeReclassifiedWithinTwelveMonths

us-gaap:CashFlowHedging, agr:NetworksSegment


Cash
Period End2021-06-302021-03-312020-09-30
Value1000000.00-2000000.0
Percentage of CashFlowHedgeGainLossToBeReclassifiedWithinTwelveMonths100.00.0100.0

us-gaap:CashFlowHedging, agr:RenewablesSegment


Cash
Period End2021-06-302021-03-312020-12-312020-09-30
Value-34000000.0-13000000.07000000.0-8000000.0
Percentage of CashFlowHedgeGainLossToBeReclassifiedWithinTwelveMonths-3400.00.00.0400.0

us-gaap:CommonStockDividendsPerShareDeclared us-gaap:SubsequentEventType

us-gaap:CommonStockDividendsPerShareDeclared

us-gaap:SubsequentEvent


Common
Period End2020-07-142020-04-272020-02-192019-07-162019-04-112019-02-132018-07-112018-04-252018-02-152017-07-062017-04-202017-02-162016-07-142016-04-20
Value0.440.440.440.440.440.440.440.4320.4320.4320.4320.4320.4320.432
Percentage of CommonStockDividendsPerShareDeclared100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ContractWithCustomerLiabilityRevenueRecognized

us-gaap:ContractWithCustomerLiabilityRevenueRecognized


Contract
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
Value5.04.05.06.05.05.05.07.04.05.00.05.04.04.0
Percentage of ContractWithCustomerLiabilityRevenueRecognized100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0100.0100.0100.0

us-gaap:DeferredIncomeTaxesAndTaxCredits

us-gaap:DeferredIncomeTaxesAndTaxCredits


Deferred
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-31
Value58-13.06.02.0-1.010.039121-43.02121244363-417.024479548851381067745-112.077119
Percentage of DeferredIncomeTaxesAndTaxCredits100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DefinedBenefitPlanAmortizationOfGainsLosses us-gaap:RetirementPlanType

us-gaap:DefinedBenefitPlanAmortizationOfGainsLosses

us-gaap:OtherPostretirementBenefitPlansDefinedBenefit


Defined
Period End2021-06-302021-03-312020-09-302020-06-302019-09-302019-06-302019-03-312018-09-302018-06-302018-03-312017-09-302017-06-302017-03-312016-09-302016-06-30
Value0-1000000.00-1000000.001000000.00-1000000.0-2000000.0-1000000.0-1000000.0-1000000.0-1000000.0-2000000.0-2000000.0
Percentage of DefinedBenefitPlanAmortizationOfGainsLosses0.0100.00.0100.00.0100.00.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:PensionPlansDefinedBenefit


Defined
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-312017-09-302017-06-302017-03-312016-09-302016-06-30
Value-24000000.0-35000000.0-31000000.0-32000000.0-31000000.0-28000000.0-27000000.0-30000000.0-38000000.0-37000000.0-38000000.0-32000000.0-31000000.0-32000000.0-40000000.0-37000000.0
Percentage of DefinedBenefitPlanAmortizationOfGainsLosses0.03500.00.03200.00.00.0-2700.00.03800.01850.03800.03200.03100.03200.02000.01850.0

us-gaap:DefinedBenefitPlanAmortizationOfPriorServiceCostCredit us-gaap:RetirementPlanType

us-gaap:DefinedBenefitPlanAmortizationOfPriorServiceCostCredit

us-gaap:OtherPostretirementBenefitPlansDefinedBenefit


Defined
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-312017-09-302017-06-302017-03-312016-09-302016-06-30
Value-1000000.0-2000000.0-3000000.0-2000000.0-2000000.0-3000000.0-2000000.0-2000000.0-2000000.0-2000000.0-2000000.0-3000000.0-2000000.0-2000000.0-4000000.0-2000000.0
Percentage of DefinedBenefitPlanAmortizationOfPriorServiceCostCredit100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:PensionPlansDefinedBenefit


Defined
Period End2021-06-302020-06-302019-09-302019-06-302018-09-302018-06-302017-09-302017-06-302016-09-302016-06-30
Value1000000.000-1000000.001000000.001000000.01000000.01000000.0
Percentage of DefinedBenefitPlanAmortizationOfPriorServiceCostCredit-100.0-0.0-0.050.0-0.0-50.0-0.0-50.0-25.0-50.0

us-gaap:DefinedBenefitPlanExpectedReturnOnPlanAssets us-gaap:RetirementPlanType

us-gaap:DefinedBenefitPlanExpectedReturnOnPlanAssets

us-gaap:OtherPostretirementBenefitPlansDefinedBenefit


Defined
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-312017-09-302017-06-302017-03-312016-09-302016-06-30
Value1.02.02.02.02.01.02.02.02.02.02.02.02.02.01.03.0
Percentage of DefinedBenefitPlanExpectedReturnOnPlanAssets100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:PensionPlansDefinedBenefit


Defined
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-312017-09-302017-06-302017-03-312016-09-302016-06-30
Value51505050504848485050504949505051
Percentage of DefinedBenefitPlanExpectedReturnOnPlanAssets5100.02500.02500.02500.02500.04800.02400.02400.02500.02500.02500.02450.02450.02500.05000.01700.0

us-gaap:DefinedBenefitPlanInterestCost us-gaap:RetirementPlanType

us-gaap:DefinedBenefitPlanInterestCost

us-gaap:OtherPostretirementBenefitPlansDefinedBenefit


Defined
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-09-302017-06-302017-03-312016-09-302016-06-30
Value3.02.03.04.03.03.04.04.04.04.06.04.05.04.05.05.05.03.06.0
Percentage of DefinedBenefitPlanInterestCost100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:PensionPlansDefinedBenefit


Defined
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-09-302017-06-302017-03-312016-09-302016-06-30
Value22222627272732333233323232323534353535
Percentage of DefinedBenefitPlanInterestCost733.31100.0866.7675.0900.0900.0800.0825.0800.0825.0533.3800.0640.0800.0700.0680.0700.01166.7583.3

us-gaap:DefinedBenefitPlanNetPeriodicBenefitCost us-gaap:RetirementPlanType

us-gaap:DefinedBenefitPlanNetPeriodicBenefitCost

us-gaap:OtherPostretirementBenefitPlansDefinedBenefit


Defined
Period End2021-06-302020-06-302020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-312017-09-302017-06-302017-03-312016-09-302016-06-30
Value1.00.00.01.0-1.01.02.04.02.03.03.03.02.04.0
Percentage of DefinedBenefitPlanNetPeriodicBenefitCost100.00.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:PensionPlansDefinedBenefit


Defined
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-312017-09-302017-06-302017-03-312016-09-302016-06-30
Value6.0172020202320253131312828283833
Percentage of DefinedBenefitPlanNetPeriodicBenefitCost600.00.00.00.00.02300.0-2000.02500.01550.0775.01550.0933.3933.3933.31900.0825.0

us-gaap:DefinedBenefitPlanServiceCost us-gaap:RetirementPlanType

us-gaap:DefinedBenefitPlanServiceCost

us-gaap:OtherPostretirementBenefitPlansDefinedBenefit


Defined
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-09-302017-06-302017-03-312016-09-302016-06-30
Value0.01.01.01.00.01.01.01.00.01.01.01.01.01.02.01.01.02.01.0
Percentage of DefinedBenefitPlanServiceCost0.0100.0100.0100.00.0100.0100.0100.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:PensionPlansDefinedBenefit


Defined
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-09-302017-06-302017-03-312016-09-302016-06-30
Value10.010.0121211121110.010.010.01111111110.011111211
Percentage of DefinedBenefitPlanServiceCost0.01000.01200.01200.00.01200.01100.01000.00.01000.01100.01100.01100.01100.0500.01100.01100.0600.01100.0

us-gaap:DepreciationAndAmortization

us-gaap:DepreciationAndAmortization


Depreciation
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-30
Value250247239255242251253237222222211226215203216205206197183203213205170163187175159159
Percentage of DepreciationAndAmortization100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DerivativeGainLossOnDerivativeNet us-gaap:DerivativeInstrumentRisk, us-gaap:IncomeStatementLocation, us-gaap:Position, us-gaap:StatementBusinessSegments, us-gaap:TransactionType

us-gaap:DerivativeGainLossOnDerivativeNet

agr:ElectricityWholesaleContract, agr:OperatingRevenues, us-gaap:Long, agr:RenewablesSegment, agr:NonTradingDerivatives


Derivative
Period End2021-06-302020-06-302019-06-30
Value-1.00.00.0
Percentage of DerivativeGainLossOnDerivativeNet100.00.00.0

agr:ElectricityWholesaleContract, agr:OperatingRevenues, us-gaap:Long, agr:RenewablesSegment, agr:TradingDerivatives


Derivative
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-30
Value7.07.0-2.03.0-1.0-1.01.0-1.0-2.0
Percentage of DerivativeGainLossOnDerivativeNet-700.00.00.00.00.00.00.00.00.0

agr:ElectricityWholesaleContract, agr:OperatingRevenues, us-gaap:Short, agr:RenewablesSegment, agr:NonTradingDerivatives


Derivative
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-30
Value-20.0-17.02.0-11.04.0113.0424.0
Percentage of DerivativeGainLossOnDerivativeNet2000.00.00.00.00.00.00.00.00.0

agr:ElectricityWholesaleContract, agr:OperatingRevenues, us-gaap:Short, agr:RenewablesSegment, agr:TradingDerivatives


Derivative
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-30
Value0.0-7.02.04.01.00.02.0
Percentage of DerivativeGainLossOnDerivativeNet0.00.00.00.00.00.00.0

agr:ElectricityWholesaleContract, us-gaap:OperatingExpense, us-gaap:Long, agr:RenewablesSegment, agr:NonTradingDerivatives


Derivative
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-30
Value2710.0-2.09.00.0-11.02.0-19.0-3.0
Percentage of DerivativeGainLossOnDerivativeNet-2700.00.00.00.00.00.00.00.00.0

us-gaap:DerivativeGainLossOnDerivativeNet us-gaap:DerivativeInstrumentRisk, us-gaap:IncomeStatementLocation, us-gaap:StatementBusinessSegments, us-gaap:TransactionType

agr:FinancialAndNaturalGasContracts, agr:OperatingRevenues, agr:RenewablesSegment, agr:NonTradingDerivatives


Derivative
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302019-12-312019-09-302019-06-30
Value-13.0-4.00.0-8.0-5.00.01.02.0
Percentage of DerivativeGainLossOnDerivativeNet1300.00.00.00.00.00.00.00.0

agr:FinancialAndNaturalGasContracts, us-gaap:OperatingExpense, agr:RenewablesSegment, agr:NonTradingDerivatives


Derivative
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-30
Value194.0-13.0165.0-2.05.06.0-3.0
Percentage of DerivativeGainLossOnDerivativeNet-1900.00.00.00.00.00.00.00.00.0

agr:FinancialPowerContracts, agr:OperatingRevenues, agr:RenewablesSegment, agr:NonTradingDerivatives


Derivative
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-30
Value-40.0-16.0-12.0-8.0221.01322
Percentage of DerivativeGainLossOnDerivativeNet4000.00.00.00.00.00.00.00.0

agr:FinancialPowerContracts, agr:OperatingRevenues, agr:RenewablesSegment, agr:TradingDerivatives


Derivative
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302019-06-30
Value-4.0-5.01.04.0-3.01.0
Percentage of DerivativeGainLossOnDerivativeNet400.00.00.00.00.00.0

agr:FinancialPowerContracts, us-gaap:OperatingExpense, agr:RenewablesSegment, agr:NonTradingDerivatives


Derivative
Period End2021-06-302021-03-312020-06-302020-03-312019-12-312019-09-302019-06-30
Value5.01.05.0-6.01.00.0-3.0
Percentage of DerivativeGainLossOnDerivativeNet-500.00.00.00.00.00.00.0

us-gaap:DerivativeGainLossOnDerivativeNet us-gaap:IncomeStatementLocation, us-gaap:StatementBusinessSegments, us-gaap:TransactionType

agr:OperatingRevenues, agr:RenewablesSegment, agr:NonTradingDerivatives


Derivative
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-30
Value-74.0-37.00.0-31.0-9.0334.05628
Percentage of DerivativeGainLossOnDerivativeNet7400.00.00.00.00.00.00.00.00.0

agr:OperatingRevenues, agr:RenewablesSegment, agr:TradingDerivatives


Derivative
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-30
Value3.02.00.0-2.03.0-1.0-1.01.0
Percentage of DerivativeGainLossOnDerivativeNet-300.00.00.00.00.00.00.00.0

us-gaap:OperatingExpense, agr:RenewablesSegment, agr:NonTradingDerivatives


Derivative
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-30
Value5115-15.02610.0-19.08.0-13.0-9.0
Percentage of DerivativeGainLossOnDerivativeNet-5100.00.00.00.00.00.00.00.00.0

us-gaap:DerivativeGainLossOnDerivativeNet us-gaap:StatementBusinessSegments, us-gaap:TransactionType

agr:RenewablesSegment, agr:NonTradingDerivatives


Derivative
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-30
Value-23.0-22.0-15.0-5.01.014124319
Percentage of DerivativeGainLossOnDerivativeNet2300.00.00.00.00.00.00.00.00.0

agr:RenewablesSegment, agr:TradingDerivatives


Derivative
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-30
Value3.02.00.0-2.03.0-1.0-1.01.0
Percentage of DerivativeGainLossOnDerivativeNet-300.00.00.00.00.00.00.00.0

us-gaap:DerivativeNonmonetaryNotionalAmountEnergyMeasure us-gaap:DerivativeInstrumentRisk, us-gaap:Position, us-gaap:StatementBusinessSegments

us-gaap:DerivativeNonmonetaryNotionalAmountEnergyMeasure

agr:ElectricityWholesaleContract, us-gaap:Long, agr:NetworksSegment


Derivative
Period End2021-06-302021-03-312018-12-31
Value0.25.20.9
Percentage of DerivativeNonmonetaryNotionalAmountEnergyMeasure100.0100.0100.0

agr:ElectricityWholesaleContract, us-gaap:Long, agr:RenewablesSegment


Derivative
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-31
Value-1.03.00.0-1.00.04.0
Percentage of DerivativeNonmonetaryNotionalAmountEnergyMeasure-500.057.70.00.00.00.0

agr:ElectricityWholesaleContract, us-gaap:Short, agr:RenewablesSegment


Derivative
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-31
Value2.07.0-1.0-1.00.09.0
Percentage of DerivativeNonmonetaryNotionalAmountEnergyMeasure1000.0134.60.00.00.00.0

agr:NaturalGasAndOtherFuelContracts, us-gaap:Long, agr:RenewablesSegment


Derivative
Period End2021-06-302021-03-31
Value-2.024
Percentage of DerivativeNonmonetaryNotionalAmountEnergyMeasure-1000.0461.5

agr:NaturalGasContracts, us-gaap:Long, agr:NetworksSegment


Derivative
Period End2021-06-302021-03-31
Value0.08.2
Percentage of DerivativeNonmonetaryNotionalAmountEnergyMeasure0.0157.7

us-gaap:BasisSwap, us-gaap:Long, agr:RenewablesSegment


Derivative
Period End2021-06-302021-03-31
Value2.032
Percentage of DerivativeNonmonetaryNotionalAmountEnergyMeasure1000.0615.4

us-gaap:BasisSwap, us-gaap:Short, agr:RenewablesSegment


Derivative
Period End2021-03-31
Value2.0
Percentage of DerivativeNonmonetaryNotionalAmountEnergyMeasure38.5

us-gaap:DerivativeNonmonetaryNotionalAmountEnergyMeasure us-gaap:DerivativeInstrumentRisk, us-gaap:StatementBusinessSegments

agr:FinancialPowerContracts, agr:RenewablesSegment


Derivative
Period End2021-06-302021-03-31
Value-2.012
Percentage of DerivativeNonmonetaryNotionalAmountEnergyMeasure-1000.0230.8

us-gaap:DerivativeNonmonetaryNotionalAmountVolume us-gaap:DerivativeInstrumentRisk, us-gaap:Position, us-gaap:StatementBusinessSegments

us-gaap:DerivativeNonmonetaryNotionalAmountVolume

agr:FleetFuelContracts, us-gaap:Long, agr:NetworksSegment


Derivative
Period End2021-06-302021-03-312018-12-31
Value100000.02600000.0100000.0
Percentage of DerivativeNonmonetaryNotionalAmountVolume100.0100.0100.0

us-gaap:EquityMethodInvestmentDividendsOrDistributions

us-gaap:EquityMethodInvestmentDividendsOrDistributions


Equity
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
Value5.04.04.06.06.03.02.08.00.02.08.03.04.03.0
Percentage of EquityMethodInvestmentDividendsOrDistributions100.0100.0100.0100.0100.0100.0100.0100.00.0100.0100.0100.0100.0100.0

us-gaap:FairValueNetDerivativeAssetLiabilityMeasuredOnRecurringBasisChangeInUnrealizedGainLoss

us-gaap:FairValueNetDerivativeAssetLiabilityMeasuredOnRecurringBasisChangeInUnrealizedGainLoss


Fair
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-30
Value9.07.00.02.01.03.0141614126.0-5.07.01.00.09.0-2.010.010.014403.0-5.0-7.02710.04024
Percentage of FairValueNetDerivativeAssetLiabilityMeasuredOnRecurringBasisChangeInUnrealizedGainLoss100.0100.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:FairValueNetDerivativeAssetLiabilityMeasuredOnRecurringBasisUnobservableInputsReconciliationGainLossIncludedInEarnings

us-gaap:FairValueNetDerivativeAssetLiabilityMeasuredOnRecurringBasisUnobservableInputsReconciliationGainLossIncludedInEarnings


Fair
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-30
Value9.07.00.02.01.03.0141614126.0-5.07.01.00.09.0-2.010.010.014403.0557.02710.0-20.0-24.0
Percentage of FairValueNetDerivativeAssetLiabilityMeasuredOnRecurringBasisUnobservableInputsReconciliationGainLossIncludedInEarnings100.0100.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:FairValueNetDerivativeAssetLiabilityMeasuredOnRecurringBasisUnobservableInputsReconciliationGainLossIncludedInOtherComprehensiveIncomeLoss

us-gaap:FairValueNetDerivativeAssetLiabilityMeasuredOnRecurringBasisUnobservableInputsReconciliationGainLossIncludedInOtherComprehensiveIncomeLoss


Fair
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302016-12-312016-09-302015-12-312015-09-302015-06-302014-12-312014-09-30
Value-30.0-16.03.0-1.00.0-4.01.0121.0-14.0-4.0-1.02.0-2.00.01.0-1.01.03.0-2.02.0-4.01.0
Percentage of FairValueNetDerivativeAssetLiabilityMeasuredOnRecurringBasisUnobservableInputsReconciliationGainLossIncludedInOtherComprehensiveIncomeLoss100.0100.0100.0100.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:FairValueNetDerivativeAssetLiabilityMeasuredOnRecurringBasisUnobservableInputsReconciliationPurchases

us-gaap:FairValueNetDerivativeAssetLiabilityMeasuredOnRecurringBasisUnobservableInputsReconciliationPurchases


Fair
Period End2021-06-302020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302015-12-312015-09-302015-06-302014-12-312014-09-30
Value-4.0-1.01.00.0450.0-26.00.00.0-3.0-1.0-2.0-8.05.0-5.03.0-3.07.0-1.0-72.0-22.022111.0
Percentage of FairValueNetDerivativeAssetLiabilityMeasuredOnRecurringBasisUnobservableInputsReconciliationPurchases100.0100.0100.00.0100.00.0100.00.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:FairValueNetDerivativeAssetLiabilityMeasuredOnRecurringBasisUnobservableInputsReconciliationSettlements

us-gaap:FairValueNetDerivativeAssetLiabilityMeasuredOnRecurringBasisUnobservableInputsReconciliationSettlements


Fair
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-30
Value0.04.06.01.02.06.04.0-10.01.03.03.03.03.01.07.03.01.06.0-1.03.02.05.02.05.04.03.0203.0
Percentage of FairValueNetDerivativeAssetLiabilityMeasuredOnRecurringBasisUnobservableInputsReconciliationSettlements0.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:FairValueNetDerivativeAssetLiabilityMeasuredOnRecurringBasisUnobservableInputsReconciliationTransfersOutOfLevel3

us-gaap:FairValueNetDerivativeAssetLiabilityMeasuredOnRecurringBasisUnobservableInputsReconciliationTransfersOutOfLevel3


Fair
Period End2020-12-312020-09-302020-06-302019-06-302016-12-312016-09-302016-06-302015-12-312015-09-302015-06-302014-12-312014-09-30
Value3.01.01.00.07.04.0-7.06.00.0-2.0-8.01.0
Percentage of FairValueNetDerivativeAssetLiabilityMeasuredOnRecurringBasisUnobservableInputsReconciliationTransfersOutOfLevel3100.0100.0100.00.0100.0100.0100.0100.00.0100.0100.0100.0

us-gaap:FinanceLeasePrincipalPayments

us-gaap:FinanceLeasePrincipalPayments


Finance
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-30
Value3.01.02.01.05.01.01.01.0
Percentage of FinanceLeasePrincipalPayments100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ForeignCurrencyCashFlowHedgeGainLossReclassifiedToEarningsNet us-gaap:HedgingDesignation

us-gaap:ForeignCurrencyCashFlowHedgeGainLossReclassifiedToEarningsNet

us-gaap:Nondesignated


Foreign
Period End2020-12-312020-09-30
Value1000000.03000000.0
Percentage of ForeignCurrencyCashFlowHedgeGainLossReclassifiedToEarningsNet100.0100.0

us-gaap:GainLossOnSaleOfBusiness us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName, us-gaap:DisposalGroupClassification

us-gaap:GainLossOnSaleOfBusiness

agr:SouthDakotaWindFarmTatanka, us-gaap:DisposalGroupDisposedOfBySaleNotDiscontinuedOperations


Gain
Period End2020-12-16
Value16
Percentage of GainLossOnSaleOfBusiness100.0

us-gaap:IncomeLossFromEquityMethodInvestments

us-gaap:IncomeLossFromEquityMethodInvestments


Income
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-09-302015-06-302015-03-312014-09-30
Value4.01.00.01.02.0-6.02.0-1.01.01.02.01.05.02.0-43.00.01.02.03.02.00.02.0-3.0-1.01.0-9.0
Percentage of IncomeLossFromEquityMethodInvestments100.0100.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0100.0100.0100.0100.00.0100.0100.0100.0100.0100.0

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

us-gaap:OperatingSegments, agr:NetworksSegment


Income
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-31
Value5.02.02.03.03.02.03.03.02.03.03.04.04.02.03.05.03.04.05.04.03.03.0
Percentage of IncomeLossFromEquityMethodInvestments125.0200.00.0300.0150.0-33.3150.0-300.0200.0300.0150.0400.080.0100.0-7.00.0300.0200.0166.7200.00.0150.0

us-gaap:OperatingSegments, agr:RenewablesSegment


Income
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-30
Value-1.0-1.0-2.0-2.0-1.0-8.0-1.0-4.0-1.0-2.0-1.0-3.01.00.0-46.0-5.0
Percentage of IncomeLossFromEquityMethodInvestments-25.0-100.00.0-200.0-50.0133.3-50.0400.0-100.0-200.0-50.0-300.020.00.0107.00.0

us-gaap:IncomeTaxCreditsAndAdjustments

us-gaap:IncomeTaxCreditsAndAdjustments


Income
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-30
Value-9.0-7.0-9.0-5.0-3.02.0-2.09.03.00.0-5.0-5.07.010.0-162.0-2.0
Percentage of IncomeTaxCreditsAndAdjustments100.0100.0100.0100.0100.0100.0100.0100.0100.00.0100.0100.0100.0100.0100.0100.0

us-gaap:IncreaseDecreaseInOtherCurrentAssets

us-gaap:IncreaseDecreaseInOtherCurrentAssets


Increase
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value-188.0169180168-191.01662107-338.04334203-121.01.0
Percentage of IncreaseDecreaseInOtherCurrentAssets100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:IncreaseDecreaseInOtherCurrentLiabilities

us-gaap:IncreaseDecreaseInOtherCurrentLiabilities


Increase
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value-50.0391368556-117.068174-203.0-44.012694-100.0-22.0
Percentage of IncreaseDecreaseInOtherCurrentLiabilities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:IncreaseDecreaseInOtherNoncurrentAssets

us-gaap:IncreaseDecreaseInOtherNoncurrentAssets


Increase
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value369318593855128-10.0-6.04056-38.02445
Percentage of IncreaseDecreaseInOtherNoncurrentAssets100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:IncreaseDecreaseInOtherNoncurrentLiabilities

us-gaap:IncreaseDecreaseInOtherNoncurrentLiabilities


Increase
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value-95.04.0-56.0-21.017-26.076-134.072-52.016-19.0-32.0115
Percentage of IncreaseDecreaseInOtherNoncurrentLiabilities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:LeaseIncome

us-gaap:LeaseIncome


Lease
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-31
Value3.02.01.02.02.01.01.01.03.01.0
Percentage of LeaseIncome100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:LeaseIncome us-gaap:StatementBusinessSegments

agr:NetworksSegment


Lease
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-31
Value3.02.01.02.02.01.01.01.03.01.0
Percentage of LeaseIncome100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:LitigationSettlementAmountAwardedToOtherParty us-gaap:LitigationCase

us-gaap:LitigationSettlementAmountAwardedToOtherParty

agr:GasStorageIndemnificationClaims


Litigation
Period End2020-12-31
Value5.0
Percentage of LitigationSettlementAmountAwardedToOtherParty100.0

us-gaap:LossOnDiscontinuationOfCashFlowHedgeDueToForecastedTransactionProbableOfNotOccurring us-gaap:StatementScenario, us-gaap:DerivativeInstrumentRisk, us-gaap:DerivativeInstrumentsGainLossByHedgingRelationship

us-gaap:LossOnDiscontinuationOfCashFlowHedgeDueToForecastedTransactionProbableOfNotOccurring

srt:ScenarioForecast, us-gaap:InterestRateContract, us-gaap:CashFlowHedging


Loss
Period End2020-12-31
Value2000000.0
Percentage of LossOnDiscontinuationOfCashFlowHedgeDueToForecastedTransactionProbableOfNotOccurring100.0

us-gaap:LossOnDiscontinuationOfCashFlowHedgeDueToForecastedTransactionProbableOfNotOccurring us-gaap:StatementScenario, us-gaap:DerivativeInstrumentsGainLossByHedgingRelationship, us-gaap:StatementBusinessSegments

srt:ScenarioForecast, us-gaap:CashFlowHedging, agr:NetworksSegment


Loss
Period End2020-12-31
Value1000000.0
Percentage of LossOnDiscontinuationOfCashFlowHedgeDueToForecastedTransactionProbableOfNotOccurring50.0

us-gaap:NoncontrollingInterestIncreaseFromSubsidiaryEquityIssuance

us-gaap:NoncontrollingInterestIncreaseFromSubsidiaryEquityIssuance


Noncontrolling
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
Value0.010.00.00.0682440.0-7.01283.00.02.02096.0
Percentage of NoncontrollingInterestIncreaseFromSubsidiaryEquityIssuance0.0100.00.00.0100.0100.00.0100.0100.0100.00.0100.0100.0100.0

us-gaap:NoncontrollingInterestIncreaseFromSubsidiaryEquityIssuance us-gaap:StatementEquityComponents

us-gaap:NoncontrollingInterest


Noncontrolling
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
Value1.010.00.00.0712440.02.01283.0-9.04.02126.0
Percentage of NoncontrollingInterestIncreaseFromSubsidiaryEquityIssuance0.0100.00.00.0104.4100.00.0-28.6100.0100.00.0200.0101.4100.0

us-gaap:Parent


Noncontrolling
Period End2021-06-302020-12-312020-09-302020-06-302019-12-312019-09-302018-12-312018-09-302018-06-30
Value-1.00.00.0-3.00.0-9.09.0-2.0-3.0
Percentage of NoncontrollingInterestIncreaseFromSubsidiaryEquityIssuance0.00.00.0-4.40.0128.60.0-100.0-1.4

us-gaap:RetainedEarnings


Noncontrolling
Period End2021-06-302020-12-312020-09-302020-06-302019-12-312019-09-302018-12-312018-09-302018-06-30
Value-1.00.00.0-3.00.0-9.09.0-2.0-3.0
Percentage of NoncontrollingInterestIncreaseFromSubsidiaryEquityIssuance0.00.00.0-4.40.0128.60.0-100.0-1.4

us-gaap:OciEquityMethodInvestmentAfterTax

us-gaap:OciEquityMethodInvestmentAfterTax


Oci
Period End2021-06-30
Value-3000000.0
Percentage of OciEquityMethodInvestmentAfterTax100.0

us-gaap:OtherComprehensiveIncomeLossBeforeReclassificationsBeforeTax us-gaap:DerivativeInstrumentsGainLossByHedgingRelationship, us-gaap:StatementBusinessSegments

us-gaap:OtherComprehensiveIncomeLossBeforeReclassificationsBeforeTax

us-gaap:CashFlowHedging, agr:NetworksSegment


Other
Period End2021-06-302021-03-312020-12-312019-09-302019-06-302019-03-31
Value1000000.0-4000000.00-4000000.0-100000.0-900000.0
Percentage of OtherComprehensiveIncomeLossBeforeReclassificationsBeforeTax100.0100.00.0100.0100.0100.0

us-gaap:OtherComprehensiveIncomeLossCashFlowHedgeGainLossBeforeReclassificationAfterTax

us-gaap:OtherComprehensiveIncomeLossCashFlowHedgeGainLossBeforeReclassificationAfterTax


Other
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-31
Value-73000000.0-27000000.09000000.0-15000000.07000000.0-23000000.005000000.02000000.0-29000000.0
Percentage of OtherComprehensiveIncomeLossCashFlowHedgeGainLossBeforeReclassificationAfterTax100.0100.0100.0100.0100.0100.00.0100.0100.0100.0

us-gaap:OtherComprehensiveIncomeLossCashFlowHedgeGainLossBeforeReclassificationAndTax

us-gaap:OtherComprehensiveIncomeLossCashFlowHedgeGainLossBeforeReclassificationAndTax


Other
Period End2021-06-30
Value-96.0
Percentage of OtherComprehensiveIncomeLossCashFlowHedgeGainLossBeforeReclassificationAndTax100.0

us-gaap:OtherComprehensiveIncomeLossCashFlowHedgeGainLossBeforeReclassificationAndTax us-gaap:DerivativeInstrumentRisk

agr:PreviouslySettledInterestRateContracts


Other
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-30
Value-3.0-2.0-3.0-2.0-2.0-1.0-1.0-1.00.0
Percentage of OtherComprehensiveIncomeLossCashFlowHedgeGainLossBeforeReclassificationAndTax3.10.00.00.00.00.00.00.00.0

us-gaap:InterestRateContract


Other
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-31
Value0.00.04.0-31.00.00.0-4.0-20.0
Percentage of OtherComprehensiveIncomeLossCashFlowHedgeGainLossBeforeReclassificationAndTax0.00.00.00.00.00.00.00.0

us-gaap:OtherComprehensiveIncomeLossCashFlowHedgeGainLossBeforeReclassificationAndTax us-gaap:DerivativeInstrumentRisk, us-gaap:IncomeStatementLocation, us-gaap:StatementBusinessSegments

us-gaap:CommodityContract, us-gaap:OperatingExpense, agr:NetworksSegment


Other
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-06-302019-03-31
Value1.01.0-1.01.0-2.0-1.01.0
Percentage of OtherComprehensiveIncomeLossCashFlowHedgeGainLossBeforeReclassificationAndTax0.00.00.00.00.00.00.0

us-gaap:ForeignExchangeContract, us-gaap:OperatingExpense, agr:NetworksSegment


Other
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-30
Value-4.03.00.04.0-6.03.0-5.01.0
Percentage of OtherComprehensiveIncomeLossCashFlowHedgeGainLossBeforeReclassificationAndTax0.00.00.00.00.00.00.00.0

us-gaap:OtherComprehensiveIncomeLossCashFlowHedgeGainLossBeforeReclassificationAndTax us-gaap:DerivativeInstrumentRisk, us-gaap:StatementBusinessSegments

us-gaap:CommodityContract, agr:RenewablesSegment


Other
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-30
Value-64.0-28.010.0-17.01.07.0-3.0135.0
Percentage of OtherComprehensiveIncomeLossCashFlowHedgeGainLossBeforeReclassificationAndTax66.70.00.00.00.00.00.00.00.0

us-gaap:ForeignExchangeContract, agr:NetworksSegment


Other
Period End2021-06-302020-06-30
Value1.04.0
Percentage of OtherComprehensiveIncomeLossCashFlowHedgeGainLossBeforeReclassificationAndTax-1.00.0

us-gaap:InterestRateContract, agr:RenewablesSegment


Other
Period End2021-06-30
Value-32.0
Percentage of OtherComprehensiveIncomeLossCashFlowHedgeGainLossBeforeReclassificationAndTax33.3

us-gaap:OtherComprehensiveIncomeLossCashFlowHedgeGainLossBeforeReclassificationAndTax us-gaap:DerivativeInstrumentsGainLossByHedgingRelationship, us-gaap:StatementBusinessSegments

us-gaap:CashFlowHedging, agr:NetworksSegment


Other
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-31
Value-1.0-1.0-1.0-1.0-1.0-1.0-1.0-1.0-2.0-2.0
Percentage of OtherComprehensiveIncomeLossCashFlowHedgeGainLossBeforeReclassificationAndTax1.00.00.00.00.00.00.00.00.00.0

us-gaap:OtherComprehensiveIncomeLossCashFlowHedgeGainLossBeforeReclassificationAndTax us-gaap:StatementBusinessSegments

agr:NetworksSegment


Other
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-31
Value1.0-3.0-1.05.0-8.03.0-5.00.01.0
Percentage of OtherComprehensiveIncomeLossCashFlowHedgeGainLossBeforeReclassificationAndTax-1.00.00.00.00.00.00.00.00.0

us-gaap:OtherComprehensiveIncomeLossCashFlowHedgeGainLossBeforeReclassificationTax

us-gaap:OtherComprehensiveIncomeLossCashFlowHedgeGainLossBeforeReclassificationTax


Other
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-31
Value-21000000.0-5000000.01000000.0-3000000.03000000.0-8500000.0-1000000.02000000.01000000.0-10900000.0
Percentage of OtherComprehensiveIncomeLossCashFlowHedgeGainLossBeforeReclassificationTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OtherComprehensiveIncomeLossCashFlowHedgeGainLossReclassificationAfterTax

us-gaap:OtherComprehensiveIncomeLossCashFlowHedgeGainLossReclassificationAfterTax


Other
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-31
Value-4000000.0-1000000.0-7000000.0-9000000.0-1000000.0-2000000.0-3000000.0-5000000.0-1000000.0-2000000.0
Percentage of OtherComprehensiveIncomeLossCashFlowHedgeGainLossReclassificationAfterTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OtherComprehensiveIncomeLossCashFlowHedgeGainLossReclassificationBeforeTax

us-gaap:OtherComprehensiveIncomeLossCashFlowHedgeGainLossReclassificationBeforeTax


Other
Period End2021-06-30
Value5.0
Percentage of OtherComprehensiveIncomeLossCashFlowHedgeGainLossReclassificationBeforeTax100.0

us-gaap:OtherComprehensiveIncomeLossCashFlowHedgeGainLossReclassificationBeforeTax us-gaap:DerivativeInstrumentRisk, us-gaap:IncomeStatementLocation

us-gaap:InterestRateContract, us-gaap:InterestExpense


Other
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-30
Value-3.0-2.0-3.0-2.0-2.0-1.0-1.0-1.00.0
Percentage of OtherComprehensiveIncomeLossCashFlowHedgeGainLossReclassificationBeforeTax-60.00.00.00.00.00.00.00.00.0

us-gaap:OtherComprehensiveIncomeLossCashFlowHedgeGainLossReclassificationBeforeTax us-gaap:DerivativeInstrumentRisk, us-gaap:IncomeStatementLocation, us-gaap:StatementBusinessSegments

us-gaap:CommodityContract, agr:OperatingRevenues, agr:RenewablesSegment


Other
Period End2021-06-302021-03-312020-09-302020-06-302019-09-302019-06-30
Value5.03.0-5.01.0-3.00.0
Percentage of OtherComprehensiveIncomeLossCashFlowHedgeGainLossReclassificationBeforeTax100.00.00.00.00.00.0

us-gaap:CommodityContract, us-gaap:OperatingExpense, agr:NetworksSegment


Other
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-31
Value0.00.0-1.00.0-2.01.00.00.0
Percentage of OtherComprehensiveIncomeLossCashFlowHedgeGainLossReclassificationBeforeTax0.00.00.00.00.00.00.00.0

us-gaap:InterestRateContract, us-gaap:InterestExpense, agr:NetworksSegment


Other
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-31
Value-1.0-1.0-1.0-1.0-1.0-1.0-1.0-1.0-2.0-2.0
Percentage of OtherComprehensiveIncomeLossCashFlowHedgeGainLossReclassificationBeforeTax-20.00.00.00.00.00.00.00.00.00.0

us-gaap:OtherComprehensiveIncomeLossCashFlowHedgeGainLossReclassificationBeforeTax us-gaap:StatementBusinessSegments

agr:NetworksSegment


Other
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-31
Value-1.0-1.0-1.0-1.0-2.0-1.0-3.00.0-2.0-2.0
Percentage of OtherComprehensiveIncomeLossCashFlowHedgeGainLossReclassificationBeforeTax-20.00.00.00.00.00.00.00.00.00.0

us-gaap:OtherComprehensiveIncomeLossCashFlowHedgeGainLossReclassificationTax

us-gaap:OtherComprehensiveIncomeLossCashFlowHedgeGainLossReclassificationTax


Other
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-31
Value3000000.0-1000000.0-3000000.001000000.0300000.0-5000000.01000000.00700000.0
Percentage of OtherComprehensiveIncomeLossCashFlowHedgeGainLossReclassificationTax100.0100.0100.00.0100.0100.0100.0100.00.0100.0

us-gaap:OtherComprehensiveIncomeLossTax

us-gaap:OtherComprehensiveIncomeLossTax


Other
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-31
Value-28.0-6.05.0-3.04.0-10.2-1.43.70.7-10.2-5.11.9-1.3-7.55.84.3-0.314426.0-13.4-12.616121.50.1
Percentage of OtherComprehensiveIncomeLossTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OtherNoncashIncomeExpense

us-gaap:OtherNoncashIncomeExpense


Other
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-31
Value145.0482313-1.01621122.0-17.0279.06.022178.0223.018-1.03.0
Percentage of OtherNoncashIncomeExpense100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:PaymentsForProceedsFromOtherInvestingActivities

us-gaap:PaymentsForProceedsFromOtherInvestingActivities


Payments
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-31
Value-270.0393221114231221271161316160.0-9.00.09.0-2.011-9.012-6.0-31.0-11.0-4.0-13.0-50.0
Percentage of PaymentsForProceedsFromOtherInvestingActivities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0100.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:PaymentsOfStockIssuanceCosts

us-gaap:PaymentsOfStockIssuanceCosts


Payments
Period End2021-03-312020-12-312020-09-302019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-30
Value1000000.00000000002000000.00001000000.000
Percentage of PaymentsOfStockIssuanceCosts100.00.00.00.00.00.00.00.00.00.0100.00.00.00.0100.00.00.0

us-gaap:PaymentsToMinorityShareholders

us-gaap:PaymentsToMinorityShareholders


Payments
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value2.03.00.01.03.01.016377.03.0163811110.0
Percentage of PaymentsToMinorityShareholders100.0100.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0

us-gaap:PensionAndOtherPostretirementBenefitContributions

us-gaap:PensionAndOtherPostretirementBenefitContributions


Pension
Period End2021-06-302021-03-312020-09-302020-06-302019-09-302019-06-302018-09-302018-06-302017-09-302017-06-302016-09-302016-06-302015-09-30
Value1.01334153612326.00.032291510
Percentage of PensionAndOtherPostretirementBenefitContributions100.0100.0100.0100.0100.0100.0100.0100.00.0100.0100.0100.0100.0

us-gaap:PensionExpense

us-gaap:PensionExpense


Pension
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-31
Value6.017222020202323202530313131282828286.03833333427262821
Percentage of PensionExpense100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ProceedsFromCollectionOfAdvanceToAffiliate

us-gaap:ProceedsFromCollectionOfAdvanceToAffiliate


Proceeds
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-06-302019-03-31
Value-3000000.05000000.0002000000.000
Percentage of ProceedsFromCollectionOfAdvanceToAffiliate100.0100.00.00.0100.00.00.0

us-gaap:ProceedsFromContributionInAidOfConstruction

us-gaap:ProceedsFromContributionInAidOfConstruction


Proceeds
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302014-12-31
Value129.01316127.038151110.02413167.02610.0156.01414338.0131521
Percentage of ProceedsFromContributionInAidOfConstruction100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ProceedsFromEquityMethodInvestmentDividendsOrDistributionsReturnOfCapital

us-gaap:ProceedsFromEquityMethodInvestmentDividendsOrDistributionsReturnOfCapital


Proceeds
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-31
Value3.01.00.02.00.01.01.0-1.03.02.00.02.00.02.00.02.00.02.02.02.00.02.0
Percentage of ProceedsFromEquityMethodInvestmentDividendsOrDistributionsReturnOfCapital100.0100.00.0100.00.0100.0100.0100.0100.0100.00.0100.00.0100.00.0100.00.0100.0100.0100.00.0100.0

us-gaap:ProceedsFromMinorityShareholders

us-gaap:ProceedsFromMinorityShareholders


Proceeds
Period End2021-06-302021-03-312020-12-312020-09-302020-05-082020-06-302020-03-022020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value0.010.00.00.070682372440.02.01283.04.0-1.02146.00.0
Percentage of ProceedsFromMinorityShareholders0.0100.00.00.0100.0100.0100.0100.00.0100.0100.0100.0100.0100.0100.0100.00.0

us-gaap:ProceedsFromOtherShortTermDebt

us-gaap:ProceedsFromOtherShortTermDebt


Proceeds
Period End2021-03-312020-03-31
Value-301.0187
Percentage of ProceedsFromOtherShortTermDebt100.0100.0

us-gaap:ProceedsFromSaleOfProductiveAssets

us-gaap:ProceedsFromSaleOfProductiveAssets


Proceeds
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-312017-09-302017-06-302017-03-31
Value-3.08.04.02.06.011-1.03.0-4.069676.02.01.0
Percentage of ProceedsFromSaleOfProductiveAssets100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ProvisionForDoubtfulAccounts

us-gaap:ProvisionForDoubtfulAccounts


Provision
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-31
Value26392319221921242621
Percentage of ProvisionForDoubtfulAccounts100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ProvisionForDoubtfulAccounts us-gaap:TransactionType

agr:DeferredPaymentArrangements


Provision
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-09-302016-06-302016-03-31
Value9.05.03.01.00.01.01.01.01.0-1.0-1.0-1.00.0-2.0-1.02.00.01.0
Percentage of ProvisionForDoubtfulAccounts34.612.815.84.50.04.23.84.80.00.00.00.00.00.00.00.00.00.0

us-gaap:PublicUtilitiesApprovedReturnOnEquityPercentage dei:LegalEntity

us-gaap:PublicUtilitiesApprovedReturnOnEquityPercentage

agr:RochesterGasAndElectricCorporation


Public
Period End2020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-312017-09-302017-06-302017-03-31
Value8.9100.09000.09000.09000.09
Percentage of PublicUtilitiesApprovedReturnOnEquityPercentage100.00.0100.00.00.0100.00.00.0100.00.00.0100.0

us-gaap:PublicUtilitiesRequestedEquityCapitalStructurePercentage us-gaap:PublicUtility

us-gaap:PublicUtilitiesRequestedEquityCapitalStructurePercentage

agr:ElectricAndGasServiceRatePlanYearOne


Public
Period End2020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-312017-09-302017-06-302017-03-31
Value49.500.5000.5000.5000.5
Percentage of PublicUtilitiesRequestedEquityCapitalStructurePercentage100.00.0100.00.00.0100.00.00.0100.00.00.0100.0

agr:ElectricAndGasServiceRatePlanYearThree


Public
Period End2020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-312017-09-302017-06-302017-03-31
Value89.100.9000.9000.9000.9
Percentage of PublicUtilitiesRequestedEquityCapitalStructurePercentage180.00.0180.00.00.0180.00.00.0180.00.00.0180.0

agr:ElectricAndGasServiceRatePlanYearTwo


Public
Period End2020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-312017-09-302017-06-302017-03-31
Value74.2500.75000.75000.75000.75
Percentage of PublicUtilitiesRequestedEquityCapitalStructurePercentage150.00.0150.00.00.0150.00.00.0150.00.00.0150.0

us-gaap:RelatedPartyTransactionAmountsOfTransaction us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName, us-gaap:RelatedPartyTransactionsByRelatedParty

us-gaap:RelatedPartyTransactionAmountsOfTransaction

agr:IberdrolaSa, agr:SiemensGamesa


Related
Period End2020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value0.00.0119.00.02.04.01.0-5.06.0
Percentage of RelatedPartyTransactionAmountsOfTransaction0.00.0100.0100.00.0100.0100.0100.0100.0100.0

us-gaap:RelatedPartyTransactionPurchasesFromRelatedParty us-gaap:RelatedPartyTransactionsByRelatedParty

us-gaap:RelatedPartyTransactionPurchasesFromRelatedParty

agr:IberdrolaFinanciacionSA


Related
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-31
Value1.02.02.03.01.01.01.01.01.00.0
Percentage of RelatedPartyTransactionPurchasesFromRelatedParty100.0100.0100.0100.0100.0100.0100.0100.0100.00.0

agr:IberdrolaRenovablesEnergiaSl


Related
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-30
Value3.02.03.02.02.02.0-1.01.05.04.04.03.04.03.02.02.03.02.01.02.02.03.02.02.03.0
Percentage of RelatedPartyTransactionPurchasesFromRelatedParty300.0100.0150.066.7200.0200.0-100.0100.0500.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

agr:IberdrolaS.A.


Related
Period End2021-06-302020-06-30
Value1411
Percentage of RelatedPartyTransactionPurchasesFromRelatedParty1400.01100.0

agr:IberdrolaSa


Related
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-30
Value131210.01110.0148.010.010.02.010.012148.010.09.09.03.010.010.08.09.08.012
Percentage of RelatedPartyTransactionPurchasesFromRelatedParty650.0600.0333.31100.01000.01400.0800.01000.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

agr:IberdrolaSolutions


Related
Period End2021-06-302021-03-31
Value1.038
Percentage of RelatedPartyTransactionPurchasesFromRelatedParty100.01900.0

agr:OtherRelatedParties


Related
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302016-12-312016-09-302016-06-302015-12-312015-09-302015-06-302015-03-31
Value0.01.01.01.00.0-1.02.01.01.02.02.00.01.0-1.00.02.0-1.01.01.0330.03.06.0
Percentage of RelatedPartyTransactionPurchasesFromRelatedParty0.050.033.3100.00.0-100.0200.0100.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:RestructuringCharges

us-gaap:RestructuringCharges


Restructuring
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-30
Value1.01.01.03.02.02.02.00.02.01.00.01.0172.1
Percentage of RestructuringCharges100.0100.0100.0100.0100.0100.0100.00.0100.0100.00.0100.0100.0100.0

us-gaap:ResultsOfOperationsRevenueOther

us-gaap:ResultsOfOperationsRevenueOther


Results
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
Value26135.0140.010.06.0178.017524.0-1.01.0
Percentage of ResultsOfOperationsRevenueOther100.0100.0100.0100.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ResultsOfOperationsRevenueOther us-gaap:ConsolidationItems

agr:CorporateReconcilingItemsAndEliminations


Results
Period End2020-09-302020-06-302019-06-30
Value1.0-1.00.0
Percentage of ResultsOfOperationsRevenueOther7.10.00.0

us-gaap:ResultsOfOperationsRevenueOther us-gaap:StatementBusinessSegments

agr:NetworksSegment


Results
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
Value128.0-2.09.02.05.05.09.02.012164.0-1.01.0
Percentage of ResultsOfOperationsRevenueOther46.261.5-40.064.30.050.083.352.925.070.630.8100.0100.0100.0

agr:RenewablesSegment


Results
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-31
Value145.07.04.0-1.05.01.08.06.05.0
Percentage of ResultsOfOperationsRevenueOther53.838.5140.028.60.050.016.747.175.029.4

us-gaap:RevenueFromRelatedParties us-gaap:RelatedPartyTransactionsByRelatedParty

us-gaap:RevenueFromRelatedParties

agr:IberdrolaSolutions


Revenue
Period End2021-06-302021-03-312020-12-312020-09-30
Value1.07.00.02.0
Percentage of RevenueFromRelatedParties100.0100.00.0100.0

agr:OtherRelatedParties


Revenue
Period End2021-06-302021-03-312020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-03-31
Value0.01.00.00.0-10.04.08.00.01.03.00.01.0-1.01.0-15.016154.01.01.01.02.01.0
Percentage of RevenueFromRelatedParties0.014.30.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

agr:VineyardWind


Revenue
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-31
Value4.04.02.03.02.02.02.04.07.00.0
Percentage of RevenueFromRelatedParties400.057.10.0150.00.00.00.00.00.00.0

us-gaap:SaleOfStockConsiderationReceivedOnTransaction

us-gaap:SaleOfStockConsiderationReceivedOnTransaction


Sale
Period End2021-05-18
Value4000
Percentage of SaleOfStockConsiderationReceivedOnTransaction100.0

us-gaap:SeveranceCosts1

us-gaap:SeveranceCosts1


Severance
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-30
Value0.00.00.02.01.01.0
Percentage of SeveranceCosts10.00.00.0100.0100.0100.0

us-gaap:SeveranceCosts1 us-gaap:IncomeStatementLocation

agr:DepreciationAndAmortization


Severance
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-31
Value1.01.01.01.01.01.00.00.0
Percentage of SeveranceCosts10.00.00.050.0100.0100.00.00.0

agr:OperationsAndMaintenance


Severance
Period End2020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-30
Value0.00.02.01.02.00.21.10.90.01.2132.1
Percentage of SeveranceCosts10.00.0100.0100.00.00.00.00.00.00.00.00.0

us-gaap:TreasuryStockValueAcquiredCostMethod

us-gaap:TreasuryStockValueAcquiredCostMethod


Treasury
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302018-12-312018-09-302018-06-302017-12-312017-09-302016-12-312016-09-30
Value02000000.0002000000.0004000000.0001000000.00
Percentage of TreasuryStockValueAcquiredCostMethod0.0100.00.00.0100.00.00.0100.00.00.0100.00.0

us-gaap:TreasuryStockValueAcquiredCostMethod us-gaap:StatementEquityComponents

us-gaap:Parent


Treasury
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302018-12-312018-09-302018-06-302017-12-312017-09-302016-12-312016-09-30
Value02000000.0002000000.0004000000.0001000000.00
Percentage of TreasuryStockValueAcquiredCostMethod0.0100.00.00.0100.00.00.0100.00.00.0100.00.0

us-gaap:TreasuryStock


Treasury
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302018-12-312018-09-302018-06-302017-12-312017-09-302016-12-312016-09-30
Value02000000.0002000000.0004000000.0001000000.00
Percentage of TreasuryStockValueAcquiredCostMethod0.0100.00.00.0100.00.00.0100.00.00.0100.00.0

us-gaap:UnderlyingDerivative us-gaap:Range, us-gaap:TradingActivityByType

us-gaap:UnderlyingDerivative

srt:Maximum, agr:ErcotShub


Underlying
Period End2020-09-302020-06-302020-03-31
Value-45.020248.39
Percentage of UnderlyingDerivative100.00.0100.0

srt:Maximum, agr:IndianaHub


Underlying
Period End2020-09-302020-06-302020-03-312019-09-30
Value-17.54061.120
Percentage of UnderlyingDerivative39.00.024.60.0

srt:Maximum, agr:MidC


Underlying
Period End2020-09-302020-06-302020-03-312019-09-30
Value-10.00105.00
Percentage of UnderlyingDerivative22.20.042.30.0

srt:Maximum, agr:MinnHub


Underlying
Period End2020-09-302020-06-302020-03-312019-09-30
Value-14.39052.170
Percentage of UnderlyingDerivative32.00.021.00.0

srt:Maximum, agr:NoilHub


Underlying
Period End2020-09-302020-06-302020-03-312019-09-30
Value-16.38055.390
Percentage of UnderlyingDerivative36.40.022.30.0

srt:Maximum, exch:NYMS


Underlying
Period End2020-09-302020-06-302020-03-312019-09-30
Value-1.4504.90
Percentage of UnderlyingDerivative3.20.02.00.0

srt:Minimum, agr:ErcotShub


Underlying
Period End2020-09-302020-06-302020-03-31
Value0011.41
Percentage of UnderlyingDerivative-0.00.04.6

srt:Minimum, agr:MinnHub


Underlying
Period End2020-09-302020-06-302020-03-312019-09-30
Value0-0.9612.480
Percentage of UnderlyingDerivative-0.00.05.00.0

srt:Minimum, agr:NoilHub


Underlying
Period End2020-09-302020-06-302020-03-312019-09-30
Value0-0.2812.980
Percentage of UnderlyingDerivative-0.00.05.20.0

srt:Minimum, exch:NYMS


Underlying
Period End2020-09-302020-06-302020-03-312019-09-30
Value0-0.121.6-0.07
Percentage of UnderlyingDerivative-0.00.00.60.0

srt:WeightedAverage, agr:ErcotShub


Underlying
Period End2020-09-302020-06-302020-03-31
Value1.380.0831.2
Percentage of UnderlyingDerivative-3.10.012.6

srt:WeightedAverage, agr:IndianaHub


Underlying
Period End2020-09-302020-06-302020-03-312019-09-30
Value-1.98-0.0130.15-0.09
Percentage of UnderlyingDerivative4.40.012.10.0

srt:WeightedAverage, agr:MidC


Underlying
Period End2020-09-302020-06-302020-03-312019-09-30
Value4.80.124.68-0.12
Percentage of UnderlyingDerivative-10.70.09.90.0

srt:WeightedAverage, agr:MinnHub


Underlying
Period End2020-09-302020-06-302020-03-312019-09-30
Value-1.95-0.0224.72-0.09
Percentage of UnderlyingDerivative4.30.010.00.0

srt:WeightedAverage, agr:NoilHub


Underlying
Period End2020-09-302020-06-302020-03-312019-09-30
Value-3.0-0.0126.93-0.08
Percentage of UnderlyingDerivative6.70.010.80.0

srt:WeightedAverage, exch:NYMS


Underlying
Period End2020-09-302020-06-302020-03-312019-09-30
Value-0.3302.84-0.02
Percentage of UnderlyingDerivative0.70.01.10.0

us-gaap:UnrealizedGainLossOnDerivatives us-gaap:BalanceSheetLocation

us-gaap:UnrealizedGainLossOnDerivatives

agr:DerivativeLiabilities


Unrealized
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
Value4.01.04.03.02.0-3.03.02.04.0-1.02.02.06.0-9.0-19.04.05.01.010.05.06.0
Percentage of UnrealizedGainLossOnDerivatives100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:UnrealizedGainLossOnDerivatives us-gaap:BalanceSheetLocation, us-gaap:DerivativeInstrumentRisk

agr:RegulatoryAssets, agr:ElectricityHedgeContracts


Unrealized
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-09-302019-06-30
Value-8.02.08.012216.06.0
Percentage of UnrealizedGainLossOnDerivatives-200.0200.0266.7600.0-700.0300.0150.0

agr:RegulatoryAssets, agr:NaturalGasHedgeContracts


Unrealized
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-06-30
Value2.0-1.00.00.05.00.0
Percentage of UnrealizedGainLossOnDerivatives50.0-100.00.00.0-166.70.0

us-gaap:UnrealizedGainLossOnDerivativesAndCommodityContracts

us-gaap:UnrealizedGainLossOnDerivativesAndCommodityContracts


Unrealized
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-31
Value-21.0-53.0-14.0-7.0-2.01810.043203.0-16.0-10.0-4.08.0-4.0-31.0-9.0270.0276.0-29.0-27.067-11.0-39.051
Percentage of UnrealizedGainLossOnDerivativesAndCommodityContracts100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:UtilitiesOperatingExpense

us-gaap:UtilitiesOperatingExpense


Utilities
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-30
Value134615601447130512371462139312481193150114161293118014621958115211081360118512011117132110708878661031932829
Percentage of UtilitiesOperatingExpense100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:UtilitiesOperatingExpenseDepreciationAndAmortization

us-gaap:UtilitiesOperatingExpenseDepreciationAndAmortization


Utilities
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-30
Value250247239255242251253237222222211226215203216205206197183203213205170163187175159159
Percentage of UtilitiesOperatingExpenseDepreciationAndAmortization100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:UtilitiesOperatingExpenseDepreciationAndAmortization us-gaap:ConsolidationItems

agr:CorporateAndEliminations


Utilities
Period End2021-06-302020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-31
Value1.00.00.01.00.00.01.00.00.0
Percentage of UtilitiesOperatingExpenseDepreciationAndAmortization0.40.00.00.40.00.00.40.00.0

us-gaap:UtilitiesOperatingExpenseDepreciationAndAmortization us-gaap:ConsolidationItems, us-gaap:StatementBusinessSegments

us-gaap:OperatingSegments, agr:NetworksSegment


Utilities
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-31
Value149156146151147148143138135134129128128118122119120113104118126118
Percentage of UtilitiesOperatingExpenseDepreciationAndAmortization59.663.261.159.260.759.056.558.260.860.461.156.659.558.156.558.058.357.456.858.159.257.6

us-gaap:OperatingSegments, agr:RenewablesSegment


Utilities
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-30
Value100919310494103110988788829887858780
Percentage of UtilitiesOperatingExpenseDepreciationAndAmortization40.036.838.940.838.841.043.541.439.239.638.943.440.541.940.339.0

us-gaap:UtilitiesOperatingExpenseMaintenanceAndOperations

us-gaap:UtilitiesOperatingExpenseMaintenanceAndOperations


Utilities
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-30
Value676642678634584570587588573553614574533527578560522551544553558551573421434380430383
Percentage of UtilitiesOperatingExpenseMaintenanceAndOperations100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:UtilitiesOperatingExpensePurchasedPower

us-gaap:UtilitiesOperatingExpensePurchasedPower


Utilities
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-30
Value265501380259265475408279259563456342279576381250242465325312221428218211151392256204
Percentage of UtilitiesOperatingExpensePurchasedPower100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:UtilitiesOperatingExpensePurchasedPower us-gaap:IncomeStatementLocation, us-gaap:StatementBusinessSegments, us-gaap:TransactionType

us-gaap:OperatingExpense, agr:RenewablesSegment, agr:NonTradingDerivatives


Utilities
Period End2021-06-302021-03-312020-06-302020-03-31
Value265501265475
Percentage of UtilitiesOperatingExpensePurchasedPower100.0100.0100.0100.0

us-gaap:UtilitiesOperatingExpenseTaxes

us-gaap:UtilitiesOperatingExpenseTaxes


Utilities
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-30
Value1551701501571461661451441391631351501431511411371381471331331251371078987847480
Percentage of UtilitiesOperatingExpenseTaxes100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

agr:ACTransmissionPublicPolicyProjectTotalCost

agr:ACTransmissionPublicPolicyProjectTotalCost


A
Period End2020-09-30
Value600
Percentage of ACTransmissionPublicPolicyProjectTotalCost100.0

agr:AccruedLiabilitiesForPropertyPlantAndEquipmentAdditions

agr:AccruedLiabilitiesForPropertyPlantAndEquipmentAdditions


Accrued
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-31
Value285357154209338148
Percentage of AccruedLiabilitiesForPropertyPlantAndEquipmentAdditions100.0100.0100.0100.0100.0100.0

agr:AccruedLiabilityForPropertyPlantAndEquipmentAdditions

agr:AccruedLiabilityForPropertyPlantAndEquipmentAdditions


Accrued
Period End2021-06-302020-06-30
Value296356
Percentage of AccruedLiabilityForPropertyPlantAndEquipmentAdditions100.0100.0

agr:AdditionalMaximumAnnualCommitment dei:LegalEntity

agr:AdditionalMaximumAnnualCommitment

agr:UnitedIlluminatingCompanyUI


Additional
Period End2020-12-31
Value64
Percentage of AdditionalMaximumAnnualCommitment100.0

agr:AdvancesReceivedCurrent

agr:AdvancesReceivedCurrent


Advances
Period End2020-12-312019-12-312018-12-31
Value141140129
Percentage of AdvancesReceivedCurrent100.0100.0100.0

agr:BusinessAcquisitionTerminationRightsTermTerminationFees us-gaap:BusinessAcquisition

agr:BusinessAcquisitionTerminationRightsTermTerminationFees

agr:NMGreenHoldingsInc


Business
Period End2020-10-20
Value130
Percentage of BusinessAcquisitionTerminationRightsTermTerminationFees100.0

agr:BusinessAcquisitionTerminationRightsTermTerminationFeesAsRemedy us-gaap:BusinessAcquisition

agr:BusinessAcquisitionTerminationRightsTermTerminationFeesAsRemedy

agr:NMGreenHoldingsInc


Business
Period End2020-10-20
Value184
Percentage of BusinessAcquisitionTerminationRightsTermTerminationFeesAsRemedy100.0

agr:DeferredTaxLiabilitiesAssetsNontaxableGrantRevenue

agr:DeferredTaxLiabilitiesAssetsNontaxableGrantRevenue


Deferred
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-31
Value-311000000.0-335000000.0-354000000.0-449000000.0-581000000.0-595000000.0-622000000.0
Percentage of DeferredTaxLiabilitiesAssetsNontaxableGrantRevenue100.0100.0100.0100.0100.0100.0100.0

agr:DeferredTaxLiabilitiesCompensationAndBenefits

agr:DeferredTaxLiabilitiesCompensationAndBenefits


Deferred
Period End2020-12-312019-12-312018-12-31
Value22438.0
Percentage of DeferredTaxLiabilitiesCompensationAndBenefits100.0100.0100.0

agr:DeferredTaxLiabilitiesUnfundedFutureIncomeTaxes

agr:DeferredTaxLiabilitiesUnfundedFutureIncomeTaxes


Deferred
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-31
Value10010110775216211146
Percentage of DeferredTaxLiabilitiesUnfundedFutureIncomeTaxes100.0100.0100.0100.0100.0100.0100.0

agr:DerivativeCollateralObligationToBePaidInDecreaseInCreditRatingBelowInvestmentGrade dei:LegalEntity

agr:DerivativeCollateralObligationToBePaidInDecreaseInCreditRatingBelowInvestmentGrade

agr:TheUnitedIlluminatingCompany


Derivative
Period End2020-09-30
Value13
Percentage of DerivativeCollateralObligationToBePaidInDecreaseInCreditRatingBelowInvestmentGrade100.0

agr:DisposalGroupNotDiscontinuedOperationPercentageOfOwnershipTransferred us-gaap:DisposalGroupClassification, us-gaap:IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperations

agr:DisposalGroupNotDiscontinuedOperationPercentageOfOwnershipTransferred

us-gaap:DisposalGroupDisposedOfBySaleNotDiscontinuedOperations, agr:SouthDakotaWindFarm


Disposal
Period End2020-07-24
Value85.0
Percentage of DisposalGroupNotDiscontinuedOperationPercentageOfOwnershipTransferred100.0

agr:DisposalGroupPercentageOfOwnershipInterestSold us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName, us-gaap:DisposalGroupClassification

agr:DisposalGroupPercentageOfOwnershipInterestSold

agr:SouthDakotaWindFarmTatanka, us-gaap:DisposalGroupDisposedOfBySaleNotDiscontinuedOperations


Disposal
Period End2020-12-16
Value85.0
Percentage of DisposalGroupPercentageOfOwnershipInterestSold100.0

agr:EnergyLegislationSettlementAgreementContributionAmount

agr:EnergyLegislationSettlementAgreementContributionAmount


Energy
Period End2021-06-23
Value5000000.0
Percentage of EnergyLegislationSettlementAgreementContributionAmount100.0

agr:EnergyLegislationSettlementAgreementCustomersRateCreditsCollectedInRateAdjustmentMechanism

agr:EnergyLegislationSettlementAgreementCustomersRateCreditsCollectedInRateAdjustmentMechanism


Energy
Period End2021-06-23
Value52
Percentage of EnergyLegislationSettlementAgreementCustomersRateCreditsCollectedInRateAdjustmentMechanism100.0

agr:EnergyLegislationSettlementAgreementCustomersRateCreditsProvided

agr:EnergyLegislationSettlementAgreementCustomersRateCreditsProvided


Energy
Period End2021-06-23
Value50
Percentage of EnergyLegislationSettlementAgreementCustomersRateCreditsProvided100.0

agr:EquityMethodInvesteeEnterpriseValue us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName

agr:EquityMethodInvesteeEnterpriseValue

agr:SouthDakotaWindFarmTatanka


Equity
Period End2020-12-16
Value298
Percentage of EquityMethodInvesteeEnterpriseValue100.0

agr:EquityMethodInvestmentEffectivePercentageOfEconomicBenefitsRetained us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName, us-gaap:DisposalGroupClassification

agr:EquityMethodInvestmentEffectivePercentageOfEconomicBenefitsRetained

agr:SouthDakotaWindFarmTatanka, us-gaap:DisposalGroupDisposedOfBySaleNotDiscontinuedOperations


Equity
Period End2020-12-16
Value7.97
Percentage of EquityMethodInvestmentEffectivePercentageOfEconomicBenefitsRetained100.0

agr:EquityRatio dei:LegalEntity

agr:EquityRatio

agr:NYSEGandRGE


Equity
Period End2020-11-19
Value50.0
Percentage of EquityRatio100.0

agr:PURA


Equity
Period End2020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312019-01-012017-12-31
Value54.00.540.540.540.540.540.540.54
Percentage of EquityRatio0.00.00.00.00.00.00.00.0

agr:RochesterGasAndElectricCorporation


Equity
Period End2020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-312017-09-302017-06-302017-03-312016-09-302016-06-30
Value48.00.480.480.480.480.480.480.480.480.480.480.480.480.48
Percentage of EquityRatio0.00.00.00.00.00.00.00.00.00.00.00.00.00.0

agr:EquityRatioForEarningsSharing dei:LegalEntity

agr:EquityRatioForEarningsSharing

agr:NYSEGandRGE


Equity
Period End2020-11-19
Value48.0
Percentage of EquityRatioForEarningsSharing100.0

agr:EquityRatioForEarningsSharing dei:LegalEntity, us-gaap:Range

agr:RochesterGasAndElectricCorporation, srt:Maximum


Equity
Period End2020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-09-302018-06-30
Value50.00.50.50.50.50.50.50.5
Percentage of EquityRatioForEarningsSharing0.00.00.00.00.00.00.00.0

agr:EquityRatioYearThree

agr:EquityRatioYearThree


Equity
Period End2020-09-30
Value55.0
Percentage of EquityRatioYearThree100.0

agr:EquityRatioYearThree us-gaap:RegulatoryAgency

agr:PURA


Equity
Period End2020-12-31
Value55.0
Percentage of EquityRatioYearThree0.0

agr:EquityRatioYearTwo dei:LegalEntity

agr:EquityRatioYearTwo

agr:PURA


Equity
Period End2020-09-30
Value54.5
Percentage of EquityRatioYearTwo100.0

agr:EquityRatioYearTwo us-gaap:RegulatoryAgency

agr:PURA


Equity
Period End2020-12-31
Value54.5
Percentage of EquityRatioYearTwo0.0

agr:EstimatedReductionInEarningsPerYearProvidedEffectiveOfSupplementalNoticeOfProposedRulemaking

agr:EstimatedReductionInEarningsPerYearProvidedEffectiveOfSupplementalNoticeOfProposedRulemaking


Estimated
Period End2021-06-30
Value3000000.0
Percentage of EstimatedReductionInEarningsPerYearProvidedEffectiveOfSupplementalNoticeOfProposedRulemaking100.0

agr:ExpectedAmortizationOfDiscontinuedCashFlowHedgesNextFiscalYear us-gaap:DerivativeInstrumentsGainLossByHedgingRelationship, us-gaap:StatementBusinessSegments

agr:ExpectedAmortizationOfDiscontinuedCashFlowHedgesNextFiscalYear

us-gaap:CashFlowHedging, agr:NetworksSegment


Expected
Period End2020-12-31
Value4000000.0
Percentage of ExpectedAmortizationOfDiscontinuedCashFlowHedgesNextFiscalYear100.0

agr:ExpectedAmortizationOfDiscontinuedCashFlowHedgesRemainderOfFiscalYear us-gaap:DerivativeInstrumentRisk, us-gaap:DerivativeInstrumentsGainLossByHedgingRelationship

agr:ExpectedAmortizationOfDiscontinuedCashFlowHedgesRemainderOfFiscalYear

us-gaap:InterestRateContract, us-gaap:CashFlowHedging


Expected
Period End2021-06-302021-03-31
Value5000000.07000000.0
Percentage of ExpectedAmortizationOfDiscontinuedCashFlowHedgesRemainderOfFiscalYear100.0100.0

agr:ExpectedAmortizationOfDiscontinuedCashFlowHedgesRemainderOfFiscalYear us-gaap:DerivativeInstrumentsGainLossByHedgingRelationship, us-gaap:StatementBusinessSegments

us-gaap:CashFlowHedging, agr:NetworksSegment


Expected
Period End2021-06-302021-03-31
Value2000000.03000000.0
Percentage of ExpectedAmortizationOfDiscontinuedCashFlowHedgesRemainderOfFiscalYear40.042.9

agr:FuturePaymentsCommitted

agr:FuturePaymentsCommitted


Future
Period End2021-01-04
Value90
Percentage of FuturePaymentsCommitted100.0

agr:InterestAccruedSubsidiariesCurrent us-gaap:ConsolidatedEntities

agr:InterestAccruedSubsidiariesCurrent

srt:ParentCompany


Interest
Period End2020-12-312019-12-312018-12-312017-12-31
Value10.0186.04.0
Percentage of InterestAccruedSubsidiariesCurrent100.0100.0100.0100.0

agr:LiabilitiesOtherthanLongtermDebtandRegulatoryLiabilitiesNoncurrent

agr:LiabilitiesOtherthanLongtermDebtandRegulatoryLiabilitiesNoncurrent


Liabilities
Period End2020-09-302020-06-302020-03-312019-12-31
Value5179521452225246
Percentage of LiabilitiesOtherthanLongtermDebtandRegulatoryLiabilitiesNoncurrent100.0100.0100.0100.0

agr:LongTermDebtCurrentMaturitiesExcludingCurrentNotesPayable

agr:LongTermDebtCurrentMaturitiesExcludingCurrentNotesPayable


Long
Period End2021-06-302021-03-312020-12-31
Value514387313
Percentage of LongTermDebtCurrentMaturitiesExcludingCurrentNotesPayable100.0100.0100.0

agr:MaximumAmountOfCommitmentToPurchaseRenewableEnergyCreditsRecsFromNewFacilitiesBehindDistributionCustomerMeters dei:LegalEntity

agr:MaximumAmountOfCommitmentToPurchaseRenewableEnergyCreditsRecsFromNewFacilitiesBehindDistributionCustomerMeters

agr:UnitedIlluminatingCompanyUI


Maximum
Period End2020-12-31
Value200
Percentage of MaximumAmountOfCommitmentToPurchaseRenewableEnergyCreditsRecsFromNewFacilitiesBehindDistributionCustomerMeters100.0

agr:MaximumAnnualCommitmentLevelObligationAfterYearSix dei:LegalEntity

agr:MaximumAnnualCommitmentLevelObligationAfterYearSix

agr:UnitedIlluminatingCompanyUI


Maximum
Period End2020-12-31
Value14
Percentage of MaximumAnnualCommitmentLevelObligationAfterYearSix100.0

agr:OtherPledgedDeposits

agr:OtherPledgedDeposits


Other
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-31
Value2.03.06.09.08.02451
Percentage of OtherPledgedDeposits100.0100.0100.0100.0100.0100.0100.0

agr:PrepaidOtherTaxes

agr:PrepaidOtherTaxes


Prepaid
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value111145135179921521231858414413721067151194
Percentage of PrepaidOtherTaxes100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

agr:PriceOfPowerPurchaseAgreements

agr:PriceOfPowerPurchaseAgreements


Price
Period End2020-09-30
Value259
Percentage of PriceOfPowerPurchaseAgreements100.0

agr:PropertyPlantAndEquipmentInServiceGross

agr:PropertyPlantAndEquipmentInServiceGross


Property
Period End2020-12-312019-12-312018-12-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-31
Value341423211030208287412814427724273202706326426261872591925745
Percentage of PropertyPlantAndEquipmentInServiceGross100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

agr:PropertyPlantAndEquipmentInServiceGross us-gaap:PropertyPlantAndEquipmentByType

us-gaap:ElectricGenerationTransmissionAndDistributionEquipment


Property
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-31
Value292182745225911246252072721564
Percentage of PropertyPlantAndEquipmentInServiceGross85.685.585.885.776.683.8

us-gaap:GasTransmissionAndDistributionEquipment


Property
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-31
Value465044004071374154163324
Percentage of PropertyPlantAndEquipmentInServiceGross13.613.713.513.020.012.9

us-gaap:OtherCapitalizedPropertyPlantAndEquipment


Property
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-31
Value274258226375920857
Percentage of PropertyPlantAndEquipmentInServiceGross0.80.80.71.33.43.3

agr:PropertyPlantAndEquipmentInServiceGross us-gaap:PropertyPlantAndEquipmentByType, us-gaap:PublicUtilityRegulatedOrUnregulatedStatus

us-gaap:ElectricGenerationTransmissionAndDistributionEquipment, us-gaap:RegulatedOperation


Property
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-31
Value163641509214242131081034311506
Percentage of PropertyPlantAndEquipmentInServiceGross47.947.047.145.638.244.7

us-gaap:ElectricGenerationTransmissionAndDistributionEquipment, us-gaap:UnregulatedOperation


Property
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-31
Value128541236011669115171038410058
Percentage of PropertyPlantAndEquipmentInServiceGross37.638.538.640.138.439.1

us-gaap:GasTransmissionAndDistributionEquipment, us-gaap:RegulatedOperation


Property
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-31
Value463743874058372848032673
Percentage of PropertyPlantAndEquipmentInServiceGross13.613.713.413.017.710.4

us-gaap:GasTransmissionAndDistributionEquipment, us-gaap:UnregulatedOperation


Property
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-31
Value13131313613651
Percentage of PropertyPlantAndEquipmentInServiceGross0.00.00.00.02.32.5

us-gaap:OtherCapitalizedPropertyPlantAndEquipment, us-gaap:UnregulatedOperation


Property
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-31
Value2742582263754340
Percentage of PropertyPlantAndEquipmentInServiceGross0.80.80.71.30.20.2

agr:PropertyPlantAndEquipmentInServiceGross us-gaap:PublicUtilityRegulatedOrUnregulatedStatus

us-gaap:RegulatedOperation


Property
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-31
Value210011947918300168361602314996
Percentage of PropertyPlantAndEquipmentInServiceGross61.560.760.658.659.258.2

us-gaap:UnregulatedOperation


Property
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-31
Value131411263111908119051104010749
Percentage of PropertyPlantAndEquipmentInServiceGross38.539.339.441.440.841.8

agr:PropertyPlantAndEquipmentInServiceNet

agr:PropertyPlantAndEquipmentInServiceNet


Property
Period End2020-12-312019-12-312018-12-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-31
Value243432305121849212442070620419201622007719552194651937219373
Percentage of PropertyPlantAndEquipmentInServiceNet100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

agr:PropertyPlantAndEquipmentInServiceNet us-gaap:PublicUtilityRegulatedOrUnregulatedStatus

us-gaap:RegulatedOperation


Property
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-31
Value156381451013685126641205311269
Percentage of PropertyPlantAndEquipmentInServiceNet64.262.962.659.660.058.2

us-gaap:UnregulatedOperation


Property
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-31
Value870585418164858080248104
Percentage of PropertyPlantAndEquipmentInServiceNet35.837.137.440.440.041.8

agr:RecoveryOfDeferredStormCostsOverFiveYear dei:LegalEntity

agr:RecoveryOfDeferredStormCostsOverFiveYear

agr:NewYorkStateElectricAndGasCorporation


Recovery
Period End2020-09-30
Value16
Percentage of RecoveryOfDeferredStormCostsOverFiveYear100.0

agr:RecoveryOfDeferredStormCostsOverTenYear dei:LegalEntity

agr:RecoveryOfDeferredStormCostsOverTenYear

agr:NewYorkStateElectricAndGasCorporation


Recovery
Period End2020-09-30
Value69
Percentage of RecoveryOfDeferredStormCostsOverTenYear100.0

agr:RegulatoryAssetsNoncurrentIncludingDeferredIncomeTaxesRegulatory

agr:RegulatoryAssetsNoncurrentIncludingDeferredIncomeTaxesRegulatory


Regulatory
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312017-12-31
Value254025832572259125792568256725002554261226462738
Percentage of RegulatoryAssetsNoncurrentIncludingDeferredIncomeTaxesRegulatory100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

agr:StandbyLettersOfCreditSuretyBondsGuaranteesAndIndemnificationsOutstanding

agr:StandbyLettersOfCreditSuretyBondsGuaranteesAndIndemnificationsOutstanding


Standby
Period End2021-06-302021-03-312020-12-31
Value547612678
Percentage of StandbyLettersOfCreditSuretyBondsGuaranteesAndIndemnificationsOutstanding100.0100.0100.0

agr:StandbyLettersOfCreditSuretyBondsGuaranteesAndIndemnificationsOutstanding us-gaap:CounterpartyName

agr:VineyardWind


Standby
Period End2021-06-302021-03-312020-12-31
Value1079588
Percentage of StandbyLettersOfCreditSuretyBondsGuaranteesAndIndemnificationsOutstanding19.615.513.0

agr:TaxCutsAndJobsActOf2017DeferredTaxLiabilitiesAssetsRemeasurement

agr:TaxCutsAndJobsActOf2017DeferredTaxLiabilitiesAssetsRemeasurement


Tax
Period End2020-12-312019-12-312018-12-312017-12-31
Value382409393401
Percentage of TaxCutsAndJobsActOf2017DeferredTaxLiabilitiesAssetsRemeasurement100.0100.0100.0100.0

us-gaap:AccountsPayableRelatedPartiesCurrent

us-gaap:AccountsPayableRelatedPartiesCurrent


Accounts
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302014-12-31
Value30165043271364584835586058658913113112021819775779083239
Percentage of AccountsPayableRelatedPartiesCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:AccountsPayableRelatedPartiesCurrent us-gaap:ConsolidatedEntities

srt:ParentCompany


Accounts
Period End2020-12-312019-12-31
Value9.07.0
Percentage of AccountsPayableRelatedPartiesCurrent18.010.9

us-gaap:AccountsReceivableGross

us-gaap:AccountsReceivableGross


Accounts
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-31
Value129511511204110411831036888
Percentage of AccountsReceivableGross100.0100.0100.0100.0100.0100.0100.0

us-gaap:AccountsReceivableGrossCurrent

us-gaap:AccountsReceivableGrossCurrent


Accounts
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302019-12-31
Value124414181295111510541151
Percentage of AccountsReceivableGrossCurrent100.0100.0100.0100.0100.0100.0

us-gaap:AccountsReceivableNet us-gaap:AccountsNotesLoansAndFinancingReceivableByReceivableType

us-gaap:AccountsReceivableNet

agr:DeferredPaymentArrangements


Accounts
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-31
Value78656255546278
Percentage of AccountsReceivableNet100.0100.0100.0100.0100.0100.0100.0

us-gaap:AccountsReceivableNet us-gaap:TransactionType

agr:DeferredPaymentArrangements


Accounts
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-31
Value105807877596365716967626661595560625854
Percentage of AccountsReceivableNet0.00.0100.00.00.00.0100.00.00.00.0100.00.00.00.0100.00.00.00.0100.0

us-gaap:AccountsReceivableRelatedPartiesCurrent

us-gaap:AccountsReceivableRelatedPartiesCurrent


Accounts
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302014-12-31
Value1115127.04.04.010.014137.06.03.03.08.010.017151725166664706950
Percentage of AccountsReceivableRelatedPartiesCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:AccountsReceivableRelatedPartiesCurrent us-gaap:ConsolidatedEntities

srt:ParentCompany


Accounts
Period End2020-12-312019-12-31
Value12422
Percentage of AccountsReceivableRelatedPartiesCurrent1033.3220.0

us-gaap:AccrualForEnvironmentalLossContingencies

us-gaap:AccrualForEnvironmentalLossContingencies


Accrual
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302014-12-31
Value295301300344348342349353362360366374385387389390380384388382388393397311319
Percentage of AccrualForEnvironmentalLossContingencies100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:AccrualForEnvironmentalLossContingencies dei:LegalEntity

agr:UnitedIlluminatingCompanyUI


Accrual
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-08-042016-06-302016-03-312015-12-312015-09-16
Value21222217171516161719202023252530303028203020202030
Percentage of AccrualForEnvironmentalLossContingencies7.17.37.34.94.94.44.64.54.75.35.55.36.06.56.47.77.97.87.35.40.05.35.25.20.0

us-gaap:AccrualForEnvironmentalLossContingencies dei:LegalEntity, us-gaap:EnvironmentalRemediationSite

agr:FirstEnergy, agr:NYSEG


Accrual
Period End2021-06-302021-03-31
Value1821
Percentage of AccrualForEnvironmentalLossContingencies6.17.0

us-gaap:AccrualForEnvironmentalLossContingencies us-gaap:Range, us-gaap:EnvironmentalRemediationSite

srt:Maximum, agr:ManufacturedGasPlants


Accrual
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-30
Value284291294378393424430423417423428442442
Percentage of AccrualForEnvironmentalLossContingencies96.396.798.0109.9112.9124.0123.2119.8115.2117.5116.9118.2114.8

srt:Minimum, agr:ManufacturedGasPlants


Accrual
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-30
Value174179177181185158164168176188193213213
Percentage of AccrualForEnvironmentalLossContingencies59.059.559.052.653.246.247.047.648.652.252.757.055.3

us-gaap:AccrualForEnvironmentalLossContingencies us-gaap:StatementGeographical, us-gaap:EnvironmentalRemediationSite

stpr:CT, agr:ManufacturedGasPlants


Accrual
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302017-12-31
Value95969696969797979898999999100
Percentage of AccrualForEnvironmentalLossContingencies32.231.932.027.927.628.427.827.527.127.227.026.525.725.7

us-gaap:AccruedEnvironmentalLossContingenciesNoncurrent

us-gaap:AccruedEnvironmentalLossContingenciesNoncurrent


Accrued
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302014-12-31
Value276284292333338327338317333330339333355351358364373386398388383394406275284
Percentage of AccruedEnvironmentalLossContingenciesNoncurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:AccruedSalariesCurrent

us-gaap:AccruedSalariesCurrent


Accrued
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-31
Value109898187846876
Percentage of AccruedSalariesCurrent100.0100.0100.0100.0100.0100.0100.0

us-gaap:AccumulatedOtherComprehensiveIncomeLossBeforeTax1 us-gaap:DerivativeInstrumentRisk, us-gaap:DerivativeInstrumentsGainLossByHedgingRelationship

us-gaap:AccumulatedOtherComprehensiveIncomeLossBeforeTax1

agr:PreviouslySettledInterestRateContracts, us-gaap:CashFlowHedging


Accumulated
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302019-12-31
Value-52.0-55.0-57.0-59.0-62.0-38.0
Percentage of AccumulatedOtherComprehensiveIncomeLossBeforeTax1100.0100.0100.0100.0100.0100.0

us-gaap:AccumulatedOtherComprehensiveIncomeLossBeforeTax1 us-gaap:DerivativeInstrumentRisk, us-gaap:DerivativeInstrumentsGainLossByHedgingRelationship, us-gaap:StatementBusinessSegments

agr:PreviouslySettledForwardStartingSwaps, us-gaap:CashFlowHedging, agr:NetworksSegment


Accumulated
Period End2021-06-302021-03-312020-12-312019-12-31
Value-49.0-50.0-51.0-55.0
Percentage of AccumulatedOtherComprehensiveIncomeLossBeforeTax194.290.989.5144.7

us-gaap:Swap, us-gaap:CashFlowHedging, agr:NetworksSegment


Accumulated
Period End2020-09-302020-06-302019-12-31
Value-52.0-53.0-55.0
Percentage of AccumulatedOtherComprehensiveIncomeLossBeforeTax188.185.5144.7

us-gaap:AdditionalCollateralAggregateFairValue

us-gaap:AdditionalCollateralAggregateFairValue


Additional
Period End2021-06-302021-03-312020-12-31
Value141618
Percentage of AdditionalCollateralAggregateFairValue100.0100.0100.0

us-gaap:AllowanceForDoubtfulAccountsReceivable

us-gaap:AllowanceForDoubtfulAccountsReceivable


Allowance
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-31
Value1501351089485736973736662
Percentage of AllowanceForDoubtfulAccountsReceivable100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:AllowanceForDoubtfulAccountsReceivable us-gaap:TransactionType

agr:DeferredPaymentArrangements


Allowance
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-31
Value62534837343333353433323332313033333130
Percentage of AllowanceForDoubtfulAccountsReceivable41.339.344.439.440.045.247.847.946.650.051.60.00.00.00.00.00.00.00.0

us-gaap:AllowanceForDoubtfulAccountsReceivableCurrent

us-gaap:AllowanceForDoubtfulAccountsReceivableCurrent


Allowance
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-31
Value15013510894856962646462495856
Percentage of AllowanceForDoubtfulAccountsReceivableCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:AmountOfRestrictedNetAssetsForConsolidatedAndUnconsolidatedSubsidiaries

us-gaap:AmountOfRestrictedNetAssetsForConsolidatedAndUnconsolidatedSubsidiaries


Amount
Period End2020-12-31
Value5408
Percentage of AmountOfRestrictedNetAssetsForConsolidatedAndUnconsolidatedSubsidiaries100.0

us-gaap:AreaOfLand dei:LegalEntity

us-gaap:AreaOfLand

agr:VineyardWindLLC


Area
Period End2020-09-30
Value260.0
Percentage of AreaOfLand100.0

us-gaap:AssetRetirementObligation

us-gaap:AssetRetirementObligation


Asset
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-31
Value210190217196161184234209
Percentage of AssetRetirementObligation100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:AssetRetirementObligationLegallyRestrictedAssetsFairValue

us-gaap:AssetRetirementObligationLegallyRestrictedAssetsFairValue


Asset
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-31
Value3000000.02000000.02000000.02000000.02000000.01800000.01700000.0
Percentage of AssetRetirementObligationLegallyRestrictedAssetsFairValue100.0100.0100.0100.0100.0100.0100.0

us-gaap:AssetRetirementObligationsNoncurrent

us-gaap:AssetRetirementObligationsNoncurrent


Asset
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302014-12-31
Value220217210208205197190186183220217211202199196176170167161167165132184245234
Percentage of AssetRetirementObligationsNoncurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:AssetsFairValueDisclosure us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FinancialInstrument

us-gaap:AssetsFairValueDisclosure

us-gaap:FairValueInputsLevel1, us-gaap:AvailableforsaleSecurities


Assets
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302015-12-31
Value41373738363534374141414141404040404139
Percentage of AssetsFairValueDisclosure100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:FairValueInputsLevel2, us-gaap:AvailableforsaleSecurities


Assets
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302017-12-31
Value121111130.00.00.00.00.00.0
Percentage of AssetsFairValueDisclosure29.329.729.734.20.00.00.00.00.00.0

us-gaap:AssetsFairValueDisclosure us-gaap:FinancialInstrument

us-gaap:AvailableforsaleSecurities


Assets
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302015-12-31
Value53484851363534374141414141404040404139
Percentage of AssetsFairValueDisclosure129.3129.7129.7134.2100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:AssetsNoncurrentOtherThanNoncurrentInvestmentsAndPropertyPlantAndEquipment

us-gaap:AssetsNoncurrentOtherThanNoncurrentInvestmentsAndPropertyPlantAndEquipment


Assets
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-31
Value38973895386338283768377138243675361736103600358937953800394939763797378037923795
Percentage of AssetsNoncurrentOtherThanNoncurrentInvestmentsAndPropertyPlantAndEquipment100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:AssetsOfDisposalGroupIncludingDiscontinuedOperation us-gaap:DisposalGroupClassification, us-gaap:IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperations

us-gaap:AssetsOfDisposalGroupIncludingDiscontinuedOperation

us-gaap:DisposalGroupDisposedOfBySaleNotDiscontinuedOperations, agr:SouthDakotaWindFarm


Assets
Period End2020-09-30
Value196
Percentage of AssetsOfDisposalGroupIncludingDiscontinuedOperation100.0

us-gaap:BusinessAcquisitionPercentageOfVotingInterestsAcquired us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName, us-gaap:RelatedPartyTransactionsByRelatedParty

us-gaap:BusinessAcquisitionPercentageOfVotingInterestsAcquired

agr:IberdrolaSa, agr:SiemensGamesa


Business
Period End2020-09-30
Value8.1
Percentage of BusinessAcquisitionPercentageOfVotingInterestsAcquired100.0

agr:SiemensGamesa, agr:Iberdrola


Business
Period End2020-12-312019-12-31
Value8.10.081
Percentage of BusinessAcquisitionPercentageOfVotingInterestsAcquired0.00.0

us-gaap:CollateralAlreadyPostedAggregateFairValue

us-gaap:CollateralAlreadyPostedAggregateFairValue


Collateral
Period End2021-06-302021-03-31
Value1513
Percentage of CollateralAlreadyPostedAggregateFairValue100.0100.0

us-gaap:CommercialPaper

us-gaap:CommercialPaper


Commercial
Period End2020-12-312019-12-312018-12-312017-12-312016-12-31
Value309562589507150
Percentage of CommercialPaper100.0100.0100.0100.0100.0

us-gaap:ContractWithCustomerAssetNetNoncurrent

us-gaap:ContractWithCustomerAssetNetNoncurrent


Contract
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302019-12-312019-09-302019-06-302019-03-312018-12-31
Value9.09.09.01212121212129.0
Percentage of ContractWithCustomerAssetNetNoncurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ContractWithCustomerLiabilityNoncurrent

us-gaap:ContractWithCustomerLiabilityNoncurrent


Contract
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302017-12-312016-12-31
Value11641181120412211239125612741330135113681385139814461483
Percentage of ContractWithCustomerLiabilityNoncurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DebtInstrumentCarryingAmount us-gaap:LongtermDebtType

us-gaap:DebtInstrumentCarryingAmount

agr:FirstMortgageBondsFixed


Debt
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-31
Value2575221820552054175218151405
Percentage of DebtInstrumentCarryingAmount100.0100.0100.0100.0100.0100.0100.0

agr:OtherVariousNonCurrentDebtFixed


Debt
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-31
Value478542283127302727722440889
Percentage of DebtInstrumentCarryingAmount185.8190.6152.2147.4158.2134.463.3

agr:UnsecuredPollutionControlNotesFixed


Debt
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312015-04-302014-12-31
Value478538526200200200200132
Percentage of DebtInstrumentCarryingAmount18.624.325.69.711.411.00.09.4

us-gaap:DebtInstrumentCollateralAmount us-gaap:LongtermDebtType

us-gaap:DebtInstrumentCollateralAmount

agr:FirstMortgageBondsFixed


Debt
Period End2020-12-31
Value7483
Percentage of DebtInstrumentCollateralAmount100.0

us-gaap:DebtInstrumentFaceAmount dei:LegalEntity, us-gaap:LongtermDebtType

us-gaap:DebtInstrumentFaceAmount

agr:BerkshireGasCompany, us-gaap:UnsecuredDebt


Debt
Period End2020-09-01
Value25
Percentage of DebtInstrumentFaceAmount100.0

agr:CMP, agr:FirstMortgageBonds


Debt
Period End2020-12-15
Value50
Percentage of DebtInstrumentFaceAmount0.0

agr:CNG, us-gaap:UnsecuredDebt


Debt
Period End2020-12-15
Value30
Percentage of DebtInstrumentFaceAmount0.0

agr:NYSEG, us-gaap:UnsecuredDebt


Debt
Period End2020-09-25
Value200
Percentage of DebtInstrumentFaceAmount0.0

agr:RGE, agr:FirstMortgageBonds


Debt
Period End2020-11-23
Value200
Percentage of DebtInstrumentFaceAmount0.0

agr:SCG, agr:FirstMortgageBonds


Debt
Period End2020-12-15
Value50
Percentage of DebtInstrumentFaceAmount0.0

agr:UI, us-gaap:UnsecuredDebt


Debt
Period End2020-12-01
Value75
Percentage of DebtInstrumentFaceAmount0.0

us-gaap:DebtInstrumentFairValue

us-gaap:DebtInstrumentFairValue


Debt
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302014-12-31
Value8827116071216692168917796381687725727661835952578156255799544354735243520452405252510049850.0031930.002962
Percentage of DebtInstrumentFairValue100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DebtInstrumentUnamortizedDiscountPremiumAndDebtIssuanceCostsNet

us-gaap:DebtInstrumentUnamortizedDiscountPremiumAndDebtIssuanceCostsNet


Debt
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-31
Value473835383125
Percentage of DebtInstrumentUnamortizedDiscountPremiumAndDebtIssuanceCostsNet100.0100.0100.0100.0100.0100.0

us-gaap:DebtWeightedAverageInterestRate us-gaap:ShortTermDebtType

us-gaap:DebtWeightedAverageInterestRate

us-gaap:CommercialPaper


Debt
Period End2020-12-312019-12-31
Value0.322.07
Percentage of DebtWeightedAverageInterestRate100.0100.0

us-gaap:DeferredCompensationSharebasedArrangementsLiabilityCurrentAndNoncurrent us-gaap:AwardType

us-gaap:DeferredCompensationSharebasedArrangementsLiabilityCurrentAndNoncurrent

us-gaap:PhantomShareUnitsPSUs


Deferred
Period End2021-06-302021-03-312020-12-312020-09-30
Value2000000.01000000.02000000.02000000.0
Percentage of DeferredCompensationSharebasedArrangementsLiabilityCurrentAndNoncurrent100.0100.0100.0100.0

us-gaap:DeferredCreditsAndOtherLiabilities

us-gaap:DeferredCreditsAndOtherLiabilities


Deferred
Period End2020-12-312019-12-312018-12-312017-12-31
Value1204127413851446
Percentage of DeferredCreditsAndOtherLiabilities100.0100.0100.0100.0

us-gaap:DeferredCreditsAndOtherLiabilities us-gaap:MajorCustomers

agr:GovernmentGrants


Deferred
Period End2020-12-312019-12-312018-12-312017-12-31
Value1190125813671427
Percentage of DeferredCreditsAndOtherLiabilities98.898.798.798.7

agr:OtherDeferredIncome


Deferred
Period End2020-12-312019-12-312018-12-312017-12-31
Value14161819
Percentage of DeferredCreditsAndOtherLiabilities1.21.31.31.3

us-gaap:DeferredFuelCost

us-gaap:DeferredFuelCost


Deferred
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302014-12-31
Value83839310086781101129162109116885799278265235246240230213307190229
Percentage of DeferredFuelCost100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DeferredIncomeTaxAssetsNet us-gaap:ConsolidatedEntities

us-gaap:DeferredIncomeTaxAssetsNet

srt:ParentCompany


Deferred
Period End2020-12-312019-12-312018-12-31
Value388374312
Percentage of DeferredIncomeTaxAssetsNet100.0100.0100.0

us-gaap:DeferredIncomeTaxLiabilities

us-gaap:DeferredIncomeTaxLiabilities


Deferred
Period End2020-12-312019-12-312018-12-31
Value191918141524
Percentage of DeferredIncomeTaxLiabilities100.0100.0100.0

us-gaap:DeferredTaxAssetsOperatingLossCarryforwards

us-gaap:DeferredTaxAssetsOperatingLossCarryforwards


Deferred
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-31
Value1047989993975139713671266
Percentage of DeferredTaxAssetsOperatingLossCarryforwards100.0100.0100.0100.0100.0100.0100.0

us-gaap:DeferredTaxAssetsOther

us-gaap:DeferredTaxAssetsOther


Deferred
Period End2020-12-312019-12-312018-12-31
Value127141102
Percentage of DeferredTaxAssetsOther100.0100.0100.0

us-gaap:DeferredTaxAssetsTaxCreditCarryforwards

us-gaap:DeferredTaxAssetsTaxCreditCarryforwards


Deferred
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-31
Value731632691574417367317
Percentage of DeferredTaxAssetsTaxCreditCarryforwards100.0100.0100.0100.0100.0100.0100.0

us-gaap:DeferredTaxLiabilitiesInvestmentInNoncontrolledAffiliates

us-gaap:DeferredTaxLiabilitiesInvestmentInNoncontrolledAffiliates


Deferred
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-31
Value167136132302651655884
Percentage of DeferredTaxLiabilitiesInvestmentInNoncontrolledAffiliates100.0100.0100.0100.0100.0100.0100.0

us-gaap:DeferredTaxLiabilitiesPropertyPlantAndEquipment

us-gaap:DeferredTaxLiabilitiesPropertyPlantAndEquipment


Deferred
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-31
Value4147400737873543519547633778
Percentage of DeferredTaxLiabilitiesPropertyPlantAndEquipment100.0100.0100.0100.0100.0100.0100.0

us-gaap:DefinedBenefitPlanAccumulatedOtherComprehensiveIncomeNetGainsLossesAfterTax us-gaap:RetirementPlanType

us-gaap:DefinedBenefitPlanAccumulatedOtherComprehensiveIncomeNetGainsLossesAfterTax

us-gaap:OtherPostretirementBenefitPlansDefinedBenefit


Defined
Period End2020-12-312019-12-312018-12-312017-12-312016-12-31
Value-14000000.0-13000000.08000000.0-35000000.0-44000000.0
Percentage of DefinedBenefitPlanAccumulatedOtherComprehensiveIncomeNetGainsLossesAfterTax100.0100.0100.0100.0100.0

us-gaap:PensionPlansDefinedBenefit


Defined
Period End2020-12-312019-12-312018-12-312017-12-312016-12-31
Value-610000000.0-706000000.0-762000000.0-737000000.0-860000000.0
Percentage of DefinedBenefitPlanAccumulatedOtherComprehensiveIncomeNetGainsLossesAfterTax4357.15430.8-9525.02105.71954.5

us-gaap:DefinedBenefitPlanAccumulatedOtherComprehensiveIncomeNetPriorServiceCostCreditAfterTax us-gaap:RetirementPlanType

us-gaap:DefinedBenefitPlanAccumulatedOtherComprehensiveIncomeNetPriorServiceCostCreditAfterTax

us-gaap:OtherPostretirementBenefitPlansDefinedBenefit


Defined
Period End2020-12-312019-12-312018-12-312017-12-312016-12-31
Value-8.0-21.0-25.0-31.0-40.0
Percentage of DefinedBenefitPlanAccumulatedOtherComprehensiveIncomeNetPriorServiceCostCreditAfterTax100.0100.0100.0100.0100.0

us-gaap:PensionPlansDefinedBenefit


Defined
Period End2020-12-312019-12-312018-12-312017-12-312016-12-31
Value10.04.04.06.07.0
Percentage of DefinedBenefitPlanAccumulatedOtherComprehensiveIncomeNetPriorServiceCostCreditAfterTax-125.0-19.0-16.0-19.4-17.5

us-gaap:DefinedBenefitPlanAssumptionsUsedCalculatingBenefitObligationDiscountRate dei:LegalEntity, us-gaap:RetirementPlanType

us-gaap:DefinedBenefitPlanAssumptionsUsedCalculatingBenefitObligationDiscountRate

agr:AvangridRenewablesHoldingsInc, us-gaap:OtherPostretirementBenefitPlansDefinedBenefit


Defined
Period End2020-12-312019-12-31
Value2.192.99
Percentage of DefinedBenefitPlanAssumptionsUsedCalculatingBenefitObligationDiscountRate100.0100.0

agr:AvangridRenewablesHoldingsInc, us-gaap:PensionPlansDefinedBenefit


Defined
Period End2020-12-312019-12-31
Value2.343.01
Percentage of DefinedBenefitPlanAssumptionsUsedCalculatingBenefitObligationDiscountRate106.8100.7

us-gaap:DefinedBenefitPlanAssumptionsUsedCalculatingBenefitObligationRateOfCompensationIncrease dei:LegalEntity, us-gaap:RetirementPlanType

us-gaap:DefinedBenefitPlanAssumptionsUsedCalculatingBenefitObligationRateOfCompensationIncrease

agr:AvangridRenewablesHoldingsInc, us-gaap:OtherPostretirementBenefitPlansDefinedBenefit


Defined
Period End2020-12-312019-12-31
Value3.53.48
Percentage of DefinedBenefitPlanAssumptionsUsedCalculatingBenefitObligationRateOfCompensationIncrease100.0100.0

agr:AvangridRenewablesHoldingsInc, us-gaap:PensionPlansDefinedBenefit


Defined
Period End2020-12-312019-12-31
Value3.523.66
Percentage of DefinedBenefitPlanAssumptionsUsedCalculatingBenefitObligationRateOfCompensationIncrease100.6105.2

us-gaap:DefinedBenefitPlanBenefitObligation us-gaap:RetirementPlanType

us-gaap:DefinedBenefitPlanBenefitObligation

us-gaap:OtherPostretirementBenefitPlansDefinedBenefit


Defined
Period End2020-12-312019-12-312018-12-312017-12-31
Value452439425491
Percentage of DefinedBenefitPlanBenefitObligation100.0100.0100.0100.0

us-gaap:PensionPlansDefinedBenefit


Defined
Period End2020-12-312019-12-312018-12-312017-12-31
Value3819366933743593
Percentage of DefinedBenefitPlanBenefitObligation844.9835.8793.9731.8

us-gaap:DefinedBenefitPlanExpectedFutureBenefitPaymentsFiveFiscalYearsThereafter us-gaap:RetirementPlanType

us-gaap:DefinedBenefitPlanExpectedFutureBenefitPaymentsFiveFiscalYearsThereafter

us-gaap:OtherPostretirementBenefitPlansDefinedBenefit


Defined
Period End2020-12-312019-12-31
Value100134
Percentage of DefinedBenefitPlanExpectedFutureBenefitPaymentsFiveFiscalYearsThereafter100.0100.0

us-gaap:PensionPlansDefinedBenefit


Defined
Period End2020-12-312019-12-31
Value7651097
Percentage of DefinedBenefitPlanExpectedFutureBenefitPaymentsFiveFiscalYearsThereafter765.0818.7

us-gaap:DefinedBenefitPlanExpectedFutureBenefitPaymentsNextTwelveMonths us-gaap:RetirementPlanType

us-gaap:DefinedBenefitPlanExpectedFutureBenefitPaymentsNextTwelveMonths

us-gaap:OtherPostretirementBenefitPlansDefinedBenefit


Defined
Period End2020-12-312019-12-31
Value3132
Percentage of DefinedBenefitPlanExpectedFutureBenefitPaymentsNextTwelveMonths100.0100.0

us-gaap:PensionPlansDefinedBenefit


Defined
Period End2020-12-312019-12-31
Value211209
Percentage of DefinedBenefitPlanExpectedFutureBenefitPaymentsNextTwelveMonths680.6653.1

us-gaap:DefinedBenefitPlanExpectedFutureBenefitPaymentsRemainderOfFiscalYear

us-gaap:DefinedBenefitPlanExpectedFutureBenefitPaymentsRemainderOfFiscalYear


Defined
Period End2021-06-302021-03-312020-09-30
Value606125
Percentage of DefinedBenefitPlanExpectedFutureBenefitPaymentsRemainderOfFiscalYear100.0100.0100.0

us-gaap:DefinedBenefitPlanExpectedFutureBenefitPaymentsYearFive us-gaap:RetirementPlanType

us-gaap:DefinedBenefitPlanExpectedFutureBenefitPaymentsYearFive

us-gaap:OtherPostretirementBenefitPlansDefinedBenefit


Defined
Period End2020-12-312019-12-31
Value4929
Percentage of DefinedBenefitPlanExpectedFutureBenefitPaymentsYearFive100.0100.0

us-gaap:PensionPlansDefinedBenefit


Defined
Period End2020-12-312019-12-31
Value474219
Percentage of DefinedBenefitPlanExpectedFutureBenefitPaymentsYearFive967.3755.2

us-gaap:DefinedBenefitPlanExpectedFutureBenefitPaymentsYearFour us-gaap:RetirementPlanType

us-gaap:DefinedBenefitPlanExpectedFutureBenefitPaymentsYearFour

us-gaap:OtherPostretirementBenefitPlansDefinedBenefit


Defined
Period End2020-12-312019-12-31
Value2930
Percentage of DefinedBenefitPlanExpectedFutureBenefitPaymentsYearFour100.0100.0

us-gaap:PensionPlansDefinedBenefit


Defined
Period End2020-12-312019-12-31
Value219217
Percentage of DefinedBenefitPlanExpectedFutureBenefitPaymentsYearFour755.2723.3

us-gaap:DefinedBenefitPlanExpectedFutureBenefitPaymentsYearThree us-gaap:RetirementPlanType

us-gaap:DefinedBenefitPlanExpectedFutureBenefitPaymentsYearThree

us-gaap:OtherPostretirementBenefitPlansDefinedBenefit


Defined
Period End2020-12-312019-12-31
Value2931
Percentage of DefinedBenefitPlanExpectedFutureBenefitPaymentsYearThree100.0100.0

us-gaap:PensionPlansDefinedBenefit


Defined
Period End2020-12-312019-12-31
Value217216
Percentage of DefinedBenefitPlanExpectedFutureBenefitPaymentsYearThree748.3696.8

us-gaap:DefinedBenefitPlanExpectedFutureBenefitPaymentsYearTwo us-gaap:RetirementPlanType

us-gaap:DefinedBenefitPlanExpectedFutureBenefitPaymentsYearTwo

us-gaap:OtherPostretirementBenefitPlansDefinedBenefit


Defined
Period End2020-12-312019-12-31
Value3032
Percentage of DefinedBenefitPlanExpectedFutureBenefitPaymentsYearTwo100.0100.0

us-gaap:PensionPlansDefinedBenefit


Defined
Period End2020-12-312019-12-31
Value224210
Percentage of DefinedBenefitPlanExpectedFutureBenefitPaymentsYearTwo746.7656.2

us-gaap:DefinedBenefitPlanExpectedFutureEmployerContributionsNextFiscalYear dei:LegalEntity, us-gaap:RetirementPlanType

us-gaap:DefinedBenefitPlanExpectedFutureEmployerContributionsNextFiscalYear

agr:USANetworksIncorporation, us-gaap:OtherPostretirementBenefitPlansDefinedBenefit


Defined
Period End2020-12-31
Value17
Percentage of DefinedBenefitPlanExpectedFutureEmployerContributionsNextFiscalYear100.0

agr:USANetworksIncorporation, us-gaap:PensionPlansDefinedBenefit


Defined
Period End2020-12-31
Value75
Percentage of DefinedBenefitPlanExpectedFutureEmployerContributionsNextFiscalYear441.2

us-gaap:DefinedBenefitPlanFundedStatusOfPlan us-gaap:RetirementPlanType

us-gaap:DefinedBenefitPlanFundedStatusOfPlan

us-gaap:OtherPostretirementBenefitPlansDefinedBenefit


Defined
Period End2020-12-312019-12-312018-12-31
Value-285000000.0-284000000.0-277000000.0
Percentage of DefinedBenefitPlanFundedStatusOfPlan100.0100.0100.0

us-gaap:PensionPlansDefinedBenefit


Defined
Period End2020-12-312019-12-312018-12-31
Value-727000000.0-821000000.0-830000000.0
Percentage of DefinedBenefitPlanFundedStatusOfPlan255.1289.1299.6

us-gaap:DefinedBenefitPlanHealthCareCostTrendRateAssumedNextFiscalYear dei:LegalEntity, us-gaap:Range

us-gaap:DefinedBenefitPlanHealthCareCostTrendRateAssumedNextFiscalYear

agr:USANetworksIncorporation, srt:Maximum


Defined
Period End2020-12-312019-12-312018-12-312017-12-31
Value7.250.07750.0850.085
Percentage of DefinedBenefitPlanHealthCareCostTrendRateAssumedNextFiscalYear100.0100.0100.0100.0

agr:USANetworksIncorporation, srt:Minimum


Defined
Period End2020-12-312019-12-312018-12-312017-12-31
Value5.250.070.0750.0675
Percentage of DefinedBenefitPlanHealthCareCostTrendRateAssumedNextFiscalYear72.490.388.279.4

us-gaap:DefinedBenefitPlanPensionPlanWithProjectedBenefitObligationInExcessOfPlanAssetsPlanAssets

us-gaap:DefinedBenefitPlanPensionPlanWithProjectedBenefitObligationInExcessOfPlanAssetsPlanAssets


Defined
Period End2020-12-312019-12-312018-12-312017-12-31
Value3092284825442865
Percentage of DefinedBenefitPlanPensionPlanWithProjectedBenefitObligationInExcessOfPlanAssetsPlanAssets100.0100.0100.0100.0

us-gaap:DefinedBenefitPlanPensionPlanWithProjectedBenefitObligationInExcessOfPlanAssetsProjectedBenefitObligation

us-gaap:DefinedBenefitPlanPensionPlanWithProjectedBenefitObligationInExcessOfPlanAssetsProjectedBenefitObligation


Defined
Period End2020-12-312019-12-312018-12-312017-12-31
Value3819366933743593
Percentage of DefinedBenefitPlanPensionPlanWithProjectedBenefitObligationInExcessOfPlanAssetsProjectedBenefitObligation100.0100.0100.0100.0

us-gaap:DefinedBenefitPlanPensionPlansWithAccumulatedBenefitObligationsInExcessOfPlanAssetsAggregateAccumulatedBenefitObligation

us-gaap:DefinedBenefitPlanPensionPlansWithAccumulatedBenefitObligationsInExcessOfPlanAssetsAggregateAccumulatedBenefitObligation


Defined
Period End2020-12-312019-12-312018-12-312017-12-31
Value3629345131743363
Percentage of DefinedBenefitPlanPensionPlansWithAccumulatedBenefitObligationsInExcessOfPlanAssetsAggregateAccumulatedBenefitObligation100.0100.0100.0100.0

us-gaap:DefinedBenefitPlanPensionPlansWithAccumulatedBenefitObligationsInExcessOfPlanAssetsAggregateFairValueOfPlanAssets

us-gaap:DefinedBenefitPlanPensionPlansWithAccumulatedBenefitObligationsInExcessOfPlanAssetsAggregateFairValueOfPlanAssets


Defined
Period End2020-12-312019-12-312018-12-312017-12-31
Value3092284825442865
Percentage of DefinedBenefitPlanPensionPlansWithAccumulatedBenefitObligationsInExcessOfPlanAssetsAggregateFairValueOfPlanAssets100.0100.0100.0100.0

us-gaap:DefinedBenefitPlanPlanAssetsTargetAllocationPercentage dei:LegalEntity, us-gaap:DefinedBenefitPlanByPlanAssetCategories, us-gaap:RetirementPlanType

us-gaap:DefinedBenefitPlanPlanAssetsTargetAllocationPercentage

agr:AvangridRenewablesHoldingsInc, agr:DefinedBenefitPlanLiabilityHedgingAssets, us-gaap:PensionPlansDefinedBenefit


Defined
Period End2020-12-31
Value40.0
Percentage of DefinedBenefitPlanPlanAssetsTargetAllocationPercentage100.0

agr:AvangridRenewablesHoldingsInc, agr:DefinedBenefitPlanReturnSeekingAssets, us-gaap:PensionPlansDefinedBenefit


Defined
Period End2020-12-31
Value60.0
Percentage of DefinedBenefitPlanPlanAssetsTargetAllocationPercentage150.0

agr:AvangridRenewablesHoldingsInc, us-gaap:DefinedBenefitPlanCashAndCashEquivalents, us-gaap:OtherPostretirementBenefitPlansDefinedBenefit


Defined
Period End2020-12-31
Value5.0
Percentage of DefinedBenefitPlanPlanAssetsTargetAllocationPercentage12.5

agr:AvangridRenewablesHoldingsInc, us-gaap:DefinedBenefitPlanEquitySecurities, us-gaap:OtherPostretirementBenefitPlansDefinedBenefit


Defined
Period End2020-12-31
Value45.0
Percentage of DefinedBenefitPlanPlanAssetsTargetAllocationPercentage112.5

agr:AvangridRenewablesHoldingsInc, us-gaap:FixedIncomeSecurities, us-gaap:OtherPostretirementBenefitPlansDefinedBenefit


Defined
Period End2020-12-31
Value50.0
Percentage of DefinedBenefitPlanPlanAssetsTargetAllocationPercentage125.0

us-gaap:DefinedBenefitPlanPlanAssetsTargetAllocationPercentage dei:LegalEntity, us-gaap:Range, us-gaap:DefinedBenefitPlanByPlanAssetCategories, us-gaap:RetirementPlanType

agr:USANetworksIncorporation, srt:Maximum, agr:DefinedBenefitPlanLiabilityHedgingAssets, us-gaap:PensionPlansDefinedBenefit


Defined
Period End2020-12-312019-12-31
Value65.00.65
Percentage of DefinedBenefitPlanPlanAssetsTargetAllocationPercentage162.50.0

agr:USANetworksIncorporation, srt:Maximum, agr:DefinedBenefitPlanReturnSeekingAssets, us-gaap:PensionPlansDefinedBenefit


Defined
Period End2020-12-312019-12-31
Value70.00.7
Percentage of DefinedBenefitPlanPlanAssetsTargetAllocationPercentage175.00.0

agr:USANetworksIncorporation, srt:Maximum, us-gaap:DefinedBenefitPlanEquitySecurities, us-gaap:OtherPostretirementBenefitPlansDefinedBenefit


Defined
Period End2020-12-312019-12-31
Value65.00.65
Percentage of DefinedBenefitPlanPlanAssetsTargetAllocationPercentage162.50.0

agr:USANetworksIncorporation, srt:Maximum, us-gaap:FixedIncomeSecurities, us-gaap:OtherPostretirementBenefitPlansDefinedBenefit


Defined
Period End2020-12-312019-12-31
Value45.00.45
Percentage of DefinedBenefitPlanPlanAssetsTargetAllocationPercentage112.50.0

agr:USANetworksIncorporation, srt:Maximum, us-gaap:OtherInvestments, us-gaap:OtherPostretirementBenefitPlansDefinedBenefit


Defined
Period End2020-12-312019-12-31
Value25.00.25
Percentage of DefinedBenefitPlanPlanAssetsTargetAllocationPercentage62.50.0

agr:USANetworksIncorporation, srt:Minimum, agr:DefinedBenefitPlanLiabilityHedgingAssets, us-gaap:PensionPlansDefinedBenefit


Defined
Period End2020-12-312019-12-31
Value34.00.34
Percentage of DefinedBenefitPlanPlanAssetsTargetAllocationPercentage85.00.0

agr:USANetworksIncorporation, srt:Minimum, agr:DefinedBenefitPlanReturnSeekingAssets, us-gaap:PensionPlansDefinedBenefit


Defined
Period End2020-12-312019-12-31
Value35.00.35
Percentage of DefinedBenefitPlanPlanAssetsTargetAllocationPercentage87.50.0

agr:USANetworksIncorporation, srt:Minimum, us-gaap:DefinedBenefitPlanEquitySecurities, us-gaap:OtherPostretirementBenefitPlansDefinedBenefit


Defined
Period End2020-12-312019-12-31
Value45.00.45
Percentage of DefinedBenefitPlanPlanAssetsTargetAllocationPercentage112.50.0

agr:USANetworksIncorporation, srt:Minimum, us-gaap:FixedIncomeSecurities, us-gaap:OtherPostretirementBenefitPlansDefinedBenefit


Defined
Period End2020-12-312019-12-31
Value25.00.25
Percentage of DefinedBenefitPlanPlanAssetsTargetAllocationPercentage62.50.0

agr:USANetworksIncorporation, srt:Minimum, us-gaap:OtherInvestments, us-gaap:OtherPostretirementBenefitPlansDefinedBenefit


Defined