AR


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

Table of contents



us-gaap:CommonStockValue
us-gaap:StatementEquityComponents
us-gaap:SharesIssued

us-gaap:CommonStockSharesIssued

us-gaap:CommonStockSharesOutstanding

us-gaap:WeightedAverageNumberOfDilutedSharesOutstanding
us-gaap:AdjustmentsForNewAccountingPronouncements
us-gaap:Restatement, us-gaap:AdjustmentsForNewAccountingPronouncements
us-gaap:Restatement, us-gaap:StatementScenario, us-gaap:AdjustmentsForNewAccountingPronouncements, us-gaap:LongtermDebtType

us-gaap:WeightedAverageNumberOfSharesOutstandingBasic
us-gaap:AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareByAntidilutiveSecurities
us-gaap:AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount

us-gaap:EarningsPerShareBasic

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

us-gaap:CostsAndExpenses
us-gaap:ConsolidatedEntities
us-gaap:ConsolidationItems
us-gaap:ConsolidationItems, us-gaap:StatementBusinessSegments
us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName, us-gaap:EquityMethodInvestmentNonconsolidatedInvestee

us-gaap:GainsLossesOnExtinguishmentOfDebt
us-gaap:LongtermDebtType, us-gaap:TypeOfArrangement

us-gaap:GeneralAndAdministrativeExpense
us-gaap:ConsolidationItems
us-gaap:ConsolidationItems, us-gaap:StatementBusinessSegments

us-gaap:IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest

us-gaap:IncomeTaxExpenseBenefit
us-gaap:LongtermDebtType
us-gaap:InterestExpenseDebt

us-gaap:InterestIncomeExpenseNet

us-gaap:InterestPaidNet

us-gaap:NetIncomeLossAttributableToNoncontrollingInterest

us-gaap:NetIncomeLossAvailableToCommonStockholdersBasic
us-gaap:ConsolidatedEntities

us-gaap:NonoperatingIncomeExpense

us-gaap:OperatingIncomeLoss
us-gaap:ConsolidatedEntities
us-gaap:ConsolidationItems
us-gaap:ConsolidationItems, us-gaap:StatementBusinessSegments
us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName, us-gaap:EquityMethodInvestmentNonconsolidatedInvestee

us-gaap:ProfitLoss
us-gaap:ConsolidatedEntities
us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName, us-gaap:EquityMethodInvestmentNonconsolidatedInvestee
us-gaap:StatementEquityComponents

us-gaap:RevenueFromContractWithCustomerIncludingAssessedTax
us-gaap:ConsolidatedEntities
us-gaap:ProductOrService
us-gaap:ProductOrService, us-gaap:StatementBusinessSegments

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

us-gaap:Assets
us-gaap:ConsolidatedEntities
us-gaap:ConsolidationItems
us-gaap:ConsolidationItems, us-gaap:StatementBusinessSegments
us-gaap:Ownership
us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName, us-gaap:EquityMethodInvestmentNonconsolidatedInvestee

us-gaap:Liabilities
us-gaap:ConsolidatedEntities

us-gaap:LiabilitiesAndStockholdersEquity
us-gaap:Ownership
us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName, us-gaap:EquityMethodInvestmentNonconsolidatedInvestee

us-gaap:StockholdersEquity

us-gaap:AssetsCurrent
us-gaap:ConsolidatedEntities
us-gaap:Ownership
us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName, us-gaap:EquityMethodInvestmentNonconsolidatedInvestee

us-gaap:CashAndCashEquivalentsAtCarryingValue

us-gaap:CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents

us-gaap:AccountsReceivableNetCurrent
us-gaap:ConsolidatedEntities

us-gaap:OtherAssetsCurrent
us-gaap:ConsolidatedEntities
us-gaap:ConsolidatedEntities
us-gaap:AssetsNoncurrent
us-gaap:Ownership
us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName, us-gaap:EquityMethodInvestmentNonconsolidatedInvestee
dei:LegalEntity
us-gaap:InvestmentsInAffiliatesSubsidiariesAssociatesAndJointVentures
us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName
us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName, us-gaap:EquityMethodInvestmentNonconsolidatedInvestee

us-gaap:OperatingLeaseRightOfUseAsset
us-gaap:PropertyPlantAndEquipmentByType
us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName, us-gaap:UnderlyingAssetClass
us-gaap:UnderlyingAssetClass

us-gaap:OtherAssetsNoncurrent

us-gaap:AccountsPayableCurrent

us-gaap:AccruedIncomeTaxesCurrent

us-gaap:AccruedLiabilitiesCurrent

us-gaap:LiabilitiesCurrent
us-gaap:ConsolidatedEntities
us-gaap:Ownership
us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName, us-gaap:EquityMethodInvestmentNonconsolidatedInvestee

us-gaap:OperatingLeaseLiabilityCurrent

us-gaap:OtherAccruedLiabilitiesCurrent

us-gaap:OtherLiabilitiesCurrent
us-gaap:ConsolidatedEntities
us-gaap:ConsolidatedEntities
us-gaap:LiabilitiesNoncurrent
us-gaap:Ownership
us-gaap:Range, us-gaap:Restatement, us-gaap:StatementScenario, us-gaap:AdjustmentsForNewAccountingPronouncements
us-gaap:Restatement, us-gaap:AdjustmentsForNewAccountingPronouncements
us-gaap:Restatement, us-gaap:StatementScenario, us-gaap:AdjustmentsForNewAccountingPronouncements
us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName, us-gaap:EquityMethodInvestmentNonconsolidatedInvestee

us-gaap:LongTermDebtNoncurrent
us-gaap:LongtermDebtType

us-gaap:DeferredFinanceCostsNoncurrentNet

us-gaap:DeferredIncomeTaxLiabilitiesNet

us-gaap:MinorityInterest
us-gaap:ConsolidatedEntities

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:Ownership
us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName, us-gaap:EquityMethodInvestmentNonconsolidatedInvestee
us-gaap:StatementEquityComponents

us-gaap:CommonStockValue

us-gaap:AdditionalPaidInCapital

us-gaap:RetainedEarningsAccumulatedDeficit

us-gaap:MinorityInterest
us-gaap:ConsolidatedEntities

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:DeferredIncomeTaxExpenseBenefit

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

us-gaap:IncreaseDecreaseInAccountsPayable

us-gaap:IncreaseDecreaseInAccountsReceivable

us-gaap:NetCashProvidedByUsedInOperatingActivities

us-gaap:ProfitLoss
us-gaap:ConsolidatedEntities
us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName, us-gaap:EquityMethodInvestmentNonconsolidatedInvestee
us-gaap:StatementEquityComponents

us-gaap:ShareBasedCompensation
us-gaap:AwardType

us-gaap:NetCashProvidedByUsedInInvestingActivities

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

us-gaap:NetCashProvidedByUsedInFinancingActivities

us-gaap:PaymentsForRepurchaseOfCommonStock

us-gaap:DebtInstrumentInterestRateStatedPercentage
us-gaap:AwardType
us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice

us-gaap:DeferredTaxLiabilities
us-gaap:Restatement

us-gaap:DeferredTaxAssetsNet

us-gaap:DeferredTaxAssetsValuationAllowance
us-gaap:Restatement

ar:AmortizationOfDeferredRevenue
us-gaap:CounterpartyName, us-gaap:StatementScenario
ar:CashDistribution

ar:CashPaidForAmountsIncludedInMeasurementOfLeaseLiabilitiesFinanceLeases

ar:CashPaidForAmountsIncludedInMeasurementOfLeaseLiabilitiesOperatingLeases

ar:ChangeInCapitalExpendituresIncurredButNotYetPaid
us-gaap:LongtermDebtType, us-gaap:SubsequentEventType
ar:DebtInstrumentPremiumOnPrincipalAmountRedeemed
us-gaap:LongtermDebtType
ar:DebtInstrumentRedemptionPriceUponChangeOfControlAsPercentageOfPrincipalAmount
us-gaap:LongtermDebtType, us-gaap:SubsequentEventType

ar:DepletionDepreciationAmortizationAndAccretion

ar:EquitizationOfConvertibleNotes

ar:ExtinguishmentOfDebtWeightedAverageDiscount
us-gaap:DebtInstrument

ar:FinanceLeaseCost

ar:GainLossOnConvertibleNoteEquitization
us-gaap:CounterpartyName
ar:GainLossOnInterestsConveyed
us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName
ar:GatheringAndCompressionFeesPaid
us-gaap:ConsolidationItems
ar:ImpairmentOfOilAndGasPropertiesProved
us-gaap:ConsolidationItems, us-gaap:StatementBusinessSegments

ar:ImpairmentOfOilAndGasUnprovedProperties

ar:IncreaseDecreaseInAccruedRevenue

ar:IncreaseDecreaseInOtherFinancingAssets

ar:IncreaseDecreaseInOtherFinancingLiabilities

ar:IncreaseDecreaseInRevenueDistributionsPayable
us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName, us-gaap:EquityMethodInvestmentNonconsolidatedInvestee
ar:InvestmentsInAffiliatesSubsidiariesAssociatesAndJointVenturesEliminationOfIntercompanyProfit
us-gaap:LongtermDebtType
ar:LongTermDebtRedemptionPriceDueToChangeOfControlAsPercentageOfPrincipalAmount
us-gaap:DebtInstrumentRedemptionPeriod, us-gaap:LongtermDebtType
ar:LongTermDebtRedemptionPriceWithNetProceedsFromEquityOfferingsAsPercentageOfPrincipalAmount
us-gaap:DebtInstrumentRedemptionPeriod, us-gaap:LongtermDebtType, us-gaap:SubsequentEventType
us-gaap:DebtInstrumentRedemptionPeriod, us-gaap:LongtermDebtType
ar:LongTermDebtRedemptionWithNetProceedsFromEquityOfferingsAsPercentageOfPrincipalAmount
us-gaap:DebtInstrumentRedemptionPeriod, us-gaap:LongtermDebtType, us-gaap:SubsequentEventType

ar:OperatingLeaseCapitalized

ar:PaymentsForProceedsFromSettledDerivativeInstrumentsOperatingActivities
us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName
ar:PercentageOfPaymentOfCapacity
us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName
ar:PercentageOfUtilizingCapacity

ar:ProceedsFromDerivativeMonetizations

ar:ProceedsFromSaleOfOverridingRoyaltyInterestsInMiningProperties

ar:ProceedsFromSettlementOfWaterEarnout
us-gaap:LongtermDebtType, us-gaap:TypeOfArrangement
ar:RepurchaseOfEquityComponentOfConvertibleNote

ar:RevenueIntersegment
us-gaap:ConsolidationItems
us-gaap:ConsolidationItems, us-gaap:StatementBusinessSegments

ar:RevenueThirdParty
us-gaap:ConsolidationItems
us-gaap:ConsolidationItems, us-gaap:StatementBusinessSegments

ar:RevenuesFromDerivativesAndOtherSources
us-gaap:AwardType
ar:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsCancelledInPeriodWeightedAverageGrantDateFairValue
us-gaap:Range, us-gaap:AwardType
ar:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNumberVestingPercentage

ar:SubsidiaryUnitsIssuedDuringPeriodValue
us-gaap:StatementEquityComponents

us-gaap:AdjustmentsToAdditionalPaidInCapitalEquityComponentOfConvertibleDebt
us-gaap:StatementEquityComponents

us-gaap:AmortizationOfFinancingCostsAndDiscounts

us-gaap:AssetImpairmentCharges

us-gaap:AssetRetirementObligationAccretionExpense

us-gaap:AssetRetirementObligationLiabilitiesIncurred

us-gaap:AssetRetirementObligationLiabilitiesSettled
us-gaap:StatementScenario, us-gaap:LongtermDebtType
us-gaap:DebtInstrumentConvertibleThresholdPercentageOfStockPriceTrigger
us-gaap:Restatement, us-gaap:AdjustmentsForNewAccountingPronouncements
us-gaap:DebtInstrumentInterestRateDuringPeriod
us-gaap:DebtInstrumentRedemptionPeriod, us-gaap:LongtermDebtType
us-gaap:DebtInstrumentRedemptionPricePercentage
us-gaap:DebtInstrumentRedemptionPeriod, us-gaap:LongtermDebtType, us-gaap:SubsequentEventType
us-gaap:LongtermDebtType

us-gaap:DerivativeInstrumentsNotDesignatedAsHedgingInstrumentsGainLossNet
us-gaap:DerivativeInstrumentRisk, us-gaap:IncomeStatementLocation

us-gaap:EquityMethodInvestmentDividendsOrDistributions
us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName, us-gaap:EquityMethodInvestmentNonconsolidatedInvestee

us-gaap:EquityMethodInvestmentOtherThanTemporaryImpairment

us-gaap:ExtinguishmentOfDebtAmount
us-gaap:DebtInstrument
us-gaap:IncomeStatementLocation
us-gaap:FinanceLeaseInterestExpense

us-gaap:FinanceLeasePrincipalPayments
us-gaap:IncomeStatementLocation
us-gaap:FinanceLeaseRightOfUseAssetAmortization

us-gaap:GainLossOnDispositionOfAssets1

us-gaap:ImpairmentOfOilAndGasProperties
us-gaap:ConsolidationItems, us-gaap:StatementBusinessSegments
us-gaap:StatementGeographical

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

us-gaap:IncreaseDecreaseInAccruedLiabilities

us-gaap:IncreaseDecreaseInOtherCurrentAssets

us-gaap:IncreaseDecreaseInOtherCurrentLiabilities

us-gaap:IncreaseDecreaseInOtherOperatingAssets
us-gaap:LongtermDebtType, us-gaap:TypeOfArrangement
us-gaap:InducedConversionOfConvertibleDebtExpense
us-gaap:Range, us-gaap:InternalCreditAssessment, us-gaap:LongtermDebtType
us-gaap:LineOfCreditFacilityUnusedCapacityCommitmentFeePercentage
us-gaap:Range, us-gaap:LongtermDebtType

us-gaap:LossOnContractTermination

us-gaap:NoncontrollingInterestIncreaseFromSubsidiaryEquityIssuance
us-gaap:StatementEquityComponents

us-gaap:OperatingLeaseCost
us-gaap:BalanceSheetLocation
us-gaap:IncomeStatementLocation

us-gaap:OperatingLeasePayments

us-gaap:OperatingLeasePaymentsUse

us-gaap:OtherOperatingIncomeExpenseNet
us-gaap:ConsolidationItems
us-gaap:ConsolidationItems, us-gaap:StatementBusinessSegments

us-gaap:PaymentsOfDebtIssuanceCosts
us-gaap:LongtermDebtType

us-gaap:PaymentsOfDividendsMinorityInterest

us-gaap:PaymentsRelatedToTaxWithholdingForShareBasedCompensation

us-gaap:PaymentsToAcquireOilAndGasProperty

us-gaap:PaymentsToAcquireOtherPropertyPlantAndEquipment

us-gaap:PaymentsToExploreAndDevelopOilAndGasProperties

us-gaap:ProceedsFromConvertibleDebt
us-gaap:LongtermDebtType

us-gaap:ProceedsFromIssuanceOfUnsecuredDebt
us-gaap:LongtermDebtType, us-gaap:SubsequentEventType, us-gaap:TypeOfArrangement
us-gaap:ProceedsFromIssuanceOrSaleOfEquity
us-gaap:LongtermDebtType, us-gaap:TypeOfArrangement
us-gaap:LitigationCase, us-gaap:LitigationStatus
us-gaap:ProceedsFromLegalSettlements

us-gaap:ProceedsFromMinorityShareholders

us-gaap:ProceedsFromPaymentsForOtherFinancingActivities

us-gaap:ProceedsFromRepaymentsOfLinesOfCredit

us-gaap:ProfessionalFees

us-gaap:RepaymentsOfUnsecuredDebt

us-gaap:RightOfUseAssetObtainedInExchangeForOperatingLeaseLiability
us-gaap:AwardType
us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeituresWeightedAverageGrantDateFairValue
us-gaap:AwardType
us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue
dei:LegalEntity, us-gaap:AwardType
us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodWeightedAverageGrantDateFairValue
us-gaap:AwardType
us-gaap:AwardType
us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedVolatilityRate
us-gaap:AwardType
us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsRiskFreeInterestRate
us-gaap:AwardType
us-gaap:ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsExpirationsInPeriodWeightedAverageExercisePrice

us-gaap:ShortTermLeaseCost

us-gaap:StockIssuedDuringPeriodSharesNewIssues
us-gaap:LongtermDebtType
us-gaap:LongtermDebtType, us-gaap:SubsequentEventType
us-gaap:StatementEquityComponents
us-gaap:StockIssuedDuringPeriodSharesShareBasedCompensation

us-gaap:StockIssuedDuringPeriodValueShareBasedCompensation
us-gaap:StatementEquityComponents

us-gaap:TaxesExcludingIncomeAndExciseTaxes

ar:AccruedCapitalExpendituresCurrent

ar:AccruedGatheringCompressionProcessingAndTransportationExpensesCurrent

ar:AccruedProductionAndAdValoremTaxes
us-gaap:AwardType
ar:CashAwardsAccrued
us-gaap:LongtermDebtType
ar:DebtConversionIfConvertedValue
us-gaap:LongtermDebtType
ar:DebtConversionIfConvertedValueAboveBelowPrincipalAmount
us-gaap:LongtermDebtType, us-gaap:SubsequentEventType
ar:DebtInstrumentIssuePriceAsPercentageOfFaceValue
us-gaap:LongtermDebtType, us-gaap:SubsequentEventType
ar:DebtInstrumentRedemptionAmount

ar:DeferredTaxAssetsInvestmentInAnteroMidstreamPartnersLp

ar:DeferredTaxLiabilitiesInvestmentInMartica

ar:DeferredTaxLiabilitiesPropertyPlantAndEquipmentOilAndGasProperty

ar:DeferredTaxLiabilityConvertibleNotes

ar:DerivativeSettlementLiabilitiesPayableCurrent

ar:DiscountedFutureNetCashFlowsRelatingToProvedOilAndGasReservesFutureNetCashFlowsBeforeIncomeTaxExpense

ar:FinanceLeasesAccumulatedAmortization
us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName, us-gaap:UnderlyingAssetClass

ar:LesseeOperatingAndFinanceLeaseLiabilityPaymentsDue

ar:LesseeOperatingAndFinanceLeaseLiabilityPaymentsDueAfterYearFive

ar:LesseeOperatingAndFinanceLeaseLiabilityPaymentsDueNextTwelve

ar:LesseeOperatingAndFinanceLeaseLiabilityPaymentsDueYearFive

ar:LesseeOperatingAndFinanceLeaseLiabilityPaymentsDueYearFour

ar:LesseeOperatingAndFinanceLeaseLiabilityPaymentsDueYearThree

ar:LesseeOperatingAndFinanceLeaseLiabilityPaymentsDueYearTwo

ar:LesseeOperatingAndFinanceLeaseLiabilityPaymentsRemainderOfFiscalYear

ar:LesseeOperatingAndFinanceLeaseLiabilityUndiscountedExcessAmount
us-gaap:LongtermDebtType
ar:LineOfCreditFacilityBorrowingBase

ar:OperatingAndFinanceLeaseLiability

ar:OperatingAndFinanceLeaseLiabilityCurrent

ar:OperatingAndFinanceLeaseLiabilityNoncurrent
us-gaap:CounterpartyName
ar:OverridingRoyaltyInterestAsProductionVolumeFromMiningPropertiesThresholdOne

ar:ReceivablesFromContractsWithCustomers

ar:RevenueDistributionsPayableCurrent
us-gaap:AwardType
ar:ShareBasedCompensationArrangementByShareBasedPaymentAwardWeightedAverageFairValueAbsoluteTsr
ar:DerivativeContractTerm, ar:Indices, us-gaap:Energy
ar:WeightedAverageHedgedDifferential
ar:DerivativeContractTerm, ar:Indices
ar:WeightedAveragePayoutRatio
ar:DerivativeContractTerm, ar:Indices, us-gaap:Energy
ar:DerivativeContractTerm, ar:Indices, us-gaap:Energy, us-gaap:FinancialInstrument

srt:FutureNetCashFlowsRelatingToProvedOilAndGasReservesCashInflows

srt:FutureNetCashFlowsRelatingToProvedOilAndGasReservesDevelopmentCosts

srt:FutureNetCashFlowsRelatingToProvedOilAndGasReservesNetCashFlows

srt:FutureNetCashFlowsRelatingToProvedOilAndGasReservesProductionCosts

srt:FutureNetCashFlowsRelatingToProvedOilAndGasReservesTenPercentAnnualDiscountForEstimatedTimingOfCashFlows

srt:ProvedDevelopedAndUndevelopedReserveNetEnergy
us-gaap:ConsolidatedEntities
us-gaap:ConsolidatedEntities, us-gaap:ReserveQuantitiesByTypeOfReserve
srt:ProvedDevelopedAndUndevelopedReservesNet
us-gaap:ReserveQuantitiesByTypeOfReserve

srt:ProvedDevelopedReservesBOE1
us-gaap:ConsolidatedEntities, us-gaap:ReserveQuantitiesByTypeOfReserve
us-gaap:ConsolidatedEntities
srt:ProvedDevelopedReservesVolume
us-gaap:ReserveQuantitiesByTypeOfReserve

srt:ProvedUndevelopedReserveBOE1
us-gaap:ConsolidatedEntities, us-gaap:ReserveQuantitiesByTypeOfReserve
us-gaap:ConsolidatedEntities
srt:ProvedUndevelopedReserveVolume
us-gaap:ReserveQuantitiesByTypeOfReserve

srt:StandardizedMeasureOfDiscountedFutureNetCashFlowsRelatingToProvedOilAndGasReserves
us-gaap:ConsolidatedEntities

us-gaap:AccountsPayableRelatedPartiesCurrent
us-gaap:ConsolidatedEntities
us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName
us-gaap:ConsolidatedEntities
us-gaap:AccountsReceivableRelatedPartiesCurrent

us-gaap:AccruedFeesAndOtherRevenueReceivable

us-gaap:AccruedMarketingCostsCurrent

us-gaap:AssetRetirementObligationsNoncurrent
us-gaap:BalanceSheetLocation
us-gaap:BankOverdrafts

us-gaap:CapitalizedCostsAccumulatedDepreciationDepletionAmortizationAndValuationAllowanceForRelatingToOilAndGasProducingActivities

us-gaap:CapitalizedCostsOilAndGasProducingActivitiesGross

us-gaap:CapitalizedCostsOilAndGasProducingActivitiesNet

us-gaap:CapitalizedCostsProvedProperties

us-gaap:CapitalizedCostsUnprovedProperties

us-gaap:CapitalizedCostsWellsAndRelatedEquipmentAndFacilities

us-gaap:ContractualObligation
us-gaap:OtherCommitments

us-gaap:ContractualObligationDueAfterFifthYear
us-gaap:OtherCommitments

us-gaap:ContractualObligationDueInFifthYear
us-gaap:OtherCommitments

us-gaap:ContractualObligationDueInFourthYear
us-gaap:OtherCommitments

us-gaap:ContractualObligationDueInNextTwelveMonths
us-gaap:OtherCommitments

us-gaap:ContractualObligationDueInSecondYear
us-gaap:OtherCommitments

us-gaap:ContractualObligationDueInThirdYear
us-gaap:OtherCommitments

us-gaap:ContractualObligationFutureMinimumPaymentsDueRemainderOfFiscalYear
us-gaap:OtherCommitments
us-gaap:FairValueByMeasurementBasis, us-gaap:LongtermDebtType
us-gaap:ConvertibleDebtFairValueDisclosures
us-gaap:LongtermDebtType
us-gaap:ConvertibleNotesPayable
us-gaap:LongtermDebtType
us-gaap:DebtInstrumentCarryingAmount
us-gaap:LongtermDebtType, us-gaap:SubsequentEventType
us-gaap:LongtermDebtType
us-gaap:DebtInstrumentConvertibleCarryingAmountOfTheEquityComponent

us-gaap:DebtInstrumentFaceAmount
us-gaap:LongtermDebtType
us-gaap:LongtermDebtType, us-gaap:SubsequentEventType
us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FairValueByMeasurementBasis
us-gaap:DebtInstrumentFairValue
us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FairValueByMeasurementBasis, us-gaap:LongtermDebtType
us-gaap:FairValueByMeasurementBasis
us-gaap:FairValueByMeasurementBasis, us-gaap:LongtermDebtType
us-gaap:LongtermDebtType
us-gaap:LongtermDebtType
us-gaap:DebtInstrumentInterestRateEffectivePercentage
us-gaap:Restatement, us-gaap:StatementScenario, us-gaap:AdjustmentsForNewAccountingPronouncements, us-gaap:LongtermDebtType
us-gaap:DebtInstrument, us-gaap:LongtermDebtType
us-gaap:DebtInstrumentRepurchasedFaceAmount
us-gaap:LongtermDebtType
us-gaap:LongtermDebtType, us-gaap:SubsequentEventType
us-gaap:LongtermDebtType, us-gaap:TypeOfArrangement
us-gaap:SubsequentEventType, us-gaap:TypeOfArrangement

us-gaap:DebtInstrumentUnamortizedDiscountPremiumNet
us-gaap:LongtermDebtType
us-gaap:AwardType
us-gaap:DeferredCompensationArrangementWithIndividualCashAwardGrantedAmount
us-gaap:LongtermDebtType
us-gaap:DeferredFinanceCostsNet

us-gaap:DeferredIncomeCurrent

us-gaap:DeferredIncomeNoncurrent

us-gaap:DeferredIncomeTaxLiabilities

us-gaap:DeferredTaxAssetsGross
us-gaap:Restatement

us-gaap:DeferredTaxAssetsOperatingLossCarryforwards

us-gaap:DeferredTaxAssetsOther

us-gaap:DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsShareBasedCompensationCost
us-gaap:LongtermDebtType
us-gaap:DeferredTaxLiabilitiesDeferredExpenseDeferredFinancingCosts
us-gaap:LongtermDebtType, us-gaap:TypeOfArrangement

us-gaap:DeferredTaxLiabilitiesDerivatives
us-gaap:DerivativeInstrumentRisk
us-gaap:DerivativeAssetFairValueGrossLiability
us-gaap:DerivativeInstrumentRisk
us-gaap:DerivativeAssets
us-gaap:HedgingDesignation

us-gaap:DerivativeAssetsCurrent
us-gaap:DerivativeInstrumentRisk, us-gaap:HedgingDesignation
us-gaap:HedgingDesignation
us-gaap:DerivativeAssetsLiabilitiesAtFairValueNet

us-gaap:DerivativeAssetsNoncurrent
us-gaap:DerivativeInstrumentRisk, us-gaap:HedgingDesignation
us-gaap:DerivativeInstrumentRisk
us-gaap:DerivativeFairValueOfDerivativeAsset
us-gaap:DerivativeInstrumentRisk
us-gaap:DerivativeFairValueOfDerivativeLiability
us-gaap:ConsolidatedEntities, us-gaap:DerivativeInstrumentRisk, us-gaap:HedgingDesignation
us-gaap:DerivativeLiabilities
us-gaap:DerivativeInstrumentRisk
us-gaap:HedgingDesignation

us-gaap:DerivativeLiabilitiesCurrent
us-gaap:ConsolidatedEntities, us-gaap:DerivativeInstrumentRisk, us-gaap:HedgingDesignation
us-gaap:DerivativeInstrumentRisk, us-gaap:HedgingDesignation

us-gaap:DerivativeLiabilitiesNoncurrent
us-gaap:ConsolidatedEntities, us-gaap:DerivativeInstrumentRisk, us-gaap:HedgingDesignation
us-gaap:DerivativeInstrumentRisk, us-gaap:HedgingDesignation
us-gaap:DerivativeInstrumentRisk
us-gaap:DerivativeLiabilityFairValueGrossAsset
ar:DerivativeContractTerm, ar:Indices, us-gaap:ConsolidatedEntities, us-gaap:Energy, us-gaap:FinancialInstrument
us-gaap:DerivativeNonmonetaryNotionalAmount
ar:DerivativeContractTerm, ar:Indices, us-gaap:Energy
ar:DerivativeContractTerm, ar:Indices, us-gaap:Energy, us-gaap:FinancialInstrument
ar:DerivativeContractTerm, us-gaap:ConsolidatedEntities, us-gaap:Energy, us-gaap:FinancialInstrument
ar:DerivativeContractTerm, us-gaap:Energy
ar:DerivativeContractTerm, us-gaap:Energy, us-gaap:FinancialInstrument
ar:DerivativeContractTerm, us-gaap:OptionIndexedToIssuersEquityType
ar:DerivativeContractTerm, us-gaap:OptionIndexedToIssuersEquityType
us-gaap:DerivativePriceRiskOptionStrikePrice
us-gaap:FinancialInstrument
us-gaap:DerivativeSwapTypeFixedPrice
us-gaap:AwardType
us-gaap:EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedShareBasedAwardsOtherThanOptions
us-gaap:Ownership
us-gaap:EquityMethodInvestmentOwnershipPercentage

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

us-gaap:FinanceLeaseLiability

us-gaap:FinanceLeaseLiabilityCurrent

us-gaap:FinanceLeaseLiabilityNoncurrent

us-gaap:FinanceLeaseLiabilityPaymentsDue

us-gaap:FinanceLeaseLiabilityPaymentsDueNextTwelveMonths

us-gaap:FinanceLeaseLiabilityPaymentsDueYearFour

us-gaap:FinanceLeaseLiabilityPaymentsDueYearThree

us-gaap:FinanceLeaseLiabilityPaymentsDueYearTwo

us-gaap:FinanceLeaseLiabilityPaymentsRemainderOfFiscalYear

us-gaap:FinanceLeaseLiabilityUndiscountedExcessAmount

us-gaap:FinanceLeaseRightOfUseAsset
us-gaap:PropertyPlantAndEquipmentByType

us-gaap:FinanceLeaseWeightedAverageDiscountRatePercent

us-gaap:InterestPayableCurrent

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueNextTwelveMonths

us-gaap:LesseeOperatingLeaseLiabilityPaymentsRemainderOfFiscalYear
us-gaap:LongtermDebtType
us-gaap:LettersOfCreditOutstandingAmount
us-gaap:LongtermDebtType
us-gaap:LineOfCredit
us-gaap:LongtermDebtType
us-gaap:LineOfCreditFacilityCurrentBorrowingCapacity

us-gaap:LongTermLineOfCredit
us-gaap:LongtermDebtType
us-gaap:LongtermDebtType
us-gaap:LongtermDebtWeightedAverageInterestRate
us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FairValueByMeasurementFrequency
us-gaap:NotesPayableFairValueDisclosure
us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FairValueByMeasurementFrequency, us-gaap:FinancialInstrument

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

us-gaap:OperatingLossCarryforwardsValuationAllowance

us-gaap:OtherAssetsMiscellaneousNoncurrent

us-gaap:PriceRiskDerivativeAssetsAtFairValue
us-gaap:CounterpartyName

us-gaap:PropertyPlantAndEquipmentAndFinanceLeaseRightOfUseAssetAccumulatedDepreciationAndAmortization

us-gaap:PropertyPlantAndEquipmentAndFinanceLeaseRightOfUseAssetAfterAccumulatedDepreciationAndAmortization

us-gaap:PropertyPlantAndEquipmentAndFinanceLeaseRightOfUseAssetBeforeAccumulatedDepreciationAndAmortization

us-gaap:PropertyPlantAndEquipmentOther

us-gaap:ProvedOilAndGasPropertySuccessfulEffortMethod
us-gaap:LongtermDebtType
us-gaap:SeniorNotes
dei:LegalEntity, us-gaap:AwardType
us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue
us-gaap:AwardType
dei:LegalEntity, us-gaap:AwardType
us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingIntrinsicValue
us-gaap:AwardType
us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestExercisableWeightedAverageExercisePrice
us-gaap:AwardType
us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestOutstandingWeightedAverageExercisePrice
us-gaap:AwardType
us-gaap:SharebasedCompensationArrangementBySharebasedPaymentAwardEquityInstrumentsOtherThanOptionsAggregateIntrinsicValueNonvested
us-gaap:LongtermDebtType
us-gaap:SharesIssuedPricePerShare
us-gaap:LongtermDebtType, us-gaap:SubsequentEventType

us-gaap:UnamortizedDebtIssuanceExpense
us-gaap:LongtermDebtType

us-gaap:UnprovedOilAndGasPropertySuccessfulEffortMethod

Plots across concepts


IncomeStatement
Income Loss From Continuing Operations 
Before Income Taxes Extraordinary Items Noncontrolling Interest
Expenses
Income Tax Expense Benefit
Balance Sheet
Cash And Cash Equivalents At Carrying Value
Assets
Cash And Cash Equivalents At Carrying Value
Current Assets
Cash And Cash Equivalents At Carrying Value
NonCurrent Assets
Other Assets Noncurrent
Liabilities
Liabilities Current
Current Liabilities
Other Liabilities Current
Noncurrent Liabilities
Other Liabilities Noncurrent
Stockholders Equity
Retained Earnings Accumulated Deficit
CashFlow
Profit Loss
NetCashProvidedByUsedInOperatingActivities
Profit Loss
NetCashProvidedByUsedInInvestingActivities
Net Cash Provided By Used In Investing Activities
NetCashProvidedByUsedInFinancingActivities
Net Cash Provided By Used In Financing Activities
Shares
Weighted Average Number Of Diluted Shares Outstanding
OperatingLeaseLiability
Operating Lease Liability Current
LesseeOperatingLeaseLiabilityPaymentsDue
Lessee Operating Lease Liability Payments Remainder Of Fiscal Year

Tables

  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
us-gaap:CommonStockValue ▇▆▁▁▁▁▅▆▇▇▇███████3.1353.0112.6862.6852.6842.6892.9593.0413.0913.0873.0863.1713.1713.1653.1643.1553.1543.15
 us-gaap:SharesIssued us-gaap:StatementEquityComponents us-gaap:CommonStockNANA268.672268.549268.39268.926295.941304.161309.123308.741308.5940.3170860.3170520.316524316.3790.315470.3154480.315006
us-gaap:CommonStockSharesIssued ▇▆▁▁▁▁▅▆▇▇▇███████313.527301.19268.672268.549268.39268.926295.941304.161309.123308.741308.594317.086317.052316.524316.379315.47315.448315.006
us-gaap:CommonStockSharesOutstanding ▇▆▁▁▁▁▅▆▇▇▇███████313.527301.19268.672268.549268.39268.926295.941304.161309.123308.741308.594317.086317.052316.524316.379315.47315.448315.006
us-gaap:WeightedAverageNumberOfDilutedSharesOutstanding █▁307.879296.746NA268.511268.386284.227NA307.781309.137308.788NA317.082316.992316.911NA315.463315.401315.769
us-gaap:WeightedAverageNumberOfSharesOutstandingBasic █▁307.879296.746NA268.511268.386284.227NA307.781309.062308.694NA317.082316.992316.471NA315.463315.401314.954
 us-gaap:AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount us-gaap:AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareByAntidilutiveSecurities ar:ConvertibleSeniorNotes4.25PercentDue2026█▁18.77815.307NANANANANANANANANANANANANANANANA
 us-gaap:AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount us-gaap:AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareByAntidilutiveSecurities ar:RestrictedStockAndRestrictedStockUnit█▁6.6426.455NA10.1296.1655.952NA2.3562.2841.445NA2.8132.8990.421NA5.0545.1051.509
 us-gaap:AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount us-gaap:AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareByAntidilutiveSecurities us-gaap:EmployeeStockOption▁█0.380.427NA0.4320.4540.459NA0.5140.5380.57NA0.6190.6390.653NA0.6740.6790.683
 us-gaap:AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount us-gaap:AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareByAntidilutiveSecurities us-gaap:PerformanceShares█▁2.7691.863NA1.9881.5951.621NA2.6762.5921.721NA1.881.861.189NA1.2931.2130.66
us-gaap:EarningsPerShareBasic ▂▄▅▂▂▃▂▁▄█▄▄▄▄▆▄▄▅-1.7-0.050.26-1.99-1.73-1.19-1.61-2.860.143.17-0.39-0.49-0.430.051.54-0.43-0.020.85
us-gaap:EarningsPerShareDiluted ▂▄▄▁▂▂▂▁▄█▃▃▃▄▆▃▄▅-1.7-0.050.24-1.99-1.73-1.19-1.61-2.190.143.17-0.39-0.49-0.430.051.54-0.43-0.020.85
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
 COGS Ratio us-gaap:ProductOrService ar:Marketings██▅▄▂▁▄▁▂▄▂▄█▇▄▁▁▂165.453164.79108.71791.49764.28546.07391.29646.64563.0891.18664.71289.598160.202144.38991.38650.76749.96865.924
 Cost Ratio us-gaap:ConsolidatedEntities ar:ParentCompanyAndGuarantorSubsidiaries▁█490.2441189.088NANANANANANANANANANANANANANANANA
 Cost Ratio us-gaap:ConsolidatedEntities srt:ParentCompanyNANA1299.647NANANANANANANANANANANANANANANA
 Cost Ratio us-gaap:ConsolidationItems,us-gaap:StatementBusinessSegments us-gaap:OperatingSegments,ar:AnteroMidstream▆▆▆▇▆▇▇▇▇▁██▇▆232.787224.121203.86233.415219.736243.708239.067243.795255.61854.108281.75266.205250.975229.591NANANANA
 Cost Ratio us-gaap:ConsolidationItems,us-gaap:StatementBusinessSegments us-gaap:OperatingSegments,ar:ExplorationAndProduction▁▆▇▁▂█▅▇█▆▅▆▅▅▆▃▄▇323.9151039.4081200.375289.094420.6261271.032861.4441072.2361236.584943.393871.168987.328828.913790.418936.258597.314741.141131.491
 Cost Ratio us-gaap:ConsolidationItems,us-gaap:StatementBusinessSegments us-gaap:OperatingSegments,ar:Marketing▅▅▃▃▂▁▃▁▂▃▂▃▅█▂▁▁▂165.453164.79108.71791.49764.28546.07391.29646.64563.0891.18664.71289.556160.092238.62369.99250.76749.96865.924
 Cost Ratio us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName,us-gaap:EquityMethodInvestmentNonconsolidatedInvestee ar:AnteroMidstream,us-gaap:EquityMethodInvestmentNonconsolidatedInvesteeOrGroupOfInvestees█▁232.787224.121NA233.415219.736243.708NANA553.521NANANANANANANANANA
 Net profit Margin us-gaap:ConsolidatedEntities srt:ParentCompanyNANA1299.647NANANANANANANANANANANANANANANA
 Net profit Margin us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName,us-gaap:EquityMethodInvestmentNonconsolidatedInvestee ar:AnteroMidstream,us-gaap:EquityMethodInvestmentNonconsolidatedInvesteeOrGroupOfInvestees█▁232.787224.121NA233.415219.736243.708NANA553.521NANANANANANANANANA
 Operating Margin us-gaap:ConsolidatedEntities srt:ParentCompanyNANA1299.647NANANANANANANANANANANANANANANA
 Operating Margin us-gaap:ConsolidationItems,us-gaap:StatementBusinessSegments us-gaap:OperatingSegments,ar:AnteroMidstream▆▆▆▇▆▇▇▇▇▁██▇▆232.787224.121203.86233.415219.736243.708239.067243.795255.61854.108281.75266.205250.975229.591NANANANA
 Operating Margin us-gaap:ConsolidationItems,us-gaap:StatementBusinessSegments us-gaap:OperatingSegments,ar:ExplorationAndProduction▁▆▇▁▂█▅▇█▆▅▆▅▅▆▃▄▇323.9151039.4081200.375289.094420.6261271.032861.4441072.2361236.584943.393871.168987.328828.913790.418936.258597.314741.141131.491
 Operating Margin us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName,us-gaap:EquityMethodInvestmentNonconsolidatedInvestee ar:AnteroMidstream,us-gaap:EquityMethodInvestmentNonconsolidatedInvesteeOrGroupOfInvestees█▁232.787224.121NA233.415219.736243.708NANA553.521NANANANANANANANANA
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
 us-gaap:CostOfGoodsAndServicesSold us-gaap:ConsolidationItems,us-gaap:ProductOrService,us-gaap:StatementBusinessSegments us-gaap:OperatingSegments,us-gaap:NaturalGasGatheringTransportationMarketingAndProcessing,ar:AnteroMidstream▆▆▅▆▆█▂▂▂▁▂▂▂▂39.55539.31436.53938.05242.06755.90812.68913.09112.3112.93513.08112.70112.411.368NANANANA
 us-gaap:CostOfGoodsAndServicesSold us-gaap:ConsolidationItems,us-gaap:ProductOrService,us-gaap:StatementBusinessSegments us-gaap:OperatingSegments,us-gaap:NaturalGasGatheringTransportationMarketingAndProcessing,ar:ExplorationAndProduction█▇██▇▆▅▇▆▅▆▃▂▁▁▁641.362605.077653.754656.615631.845588.624551.39603.86566.834535.015556.243442.602409.708384.345370.607369.538NANA
 us-gaap:CostOfGoodsAndServicesSold us-gaap:ConsolidationItems,us-gaap:ProductOrService,us-gaap:StatementBusinessSegments us-gaap:OperatingSegments,us-gaap:OilAndGasOperationAndMaintenance,ar:ExplorationAndProduction▁▂▃▁▂▂▃▆▇██▅▄▄▆▂21.64524.54727.02921.4524.74225.64427.23635.92840.85742.96943.53635.12432.31231.26236.76724.06NANA
 us-gaap:CostOfGoodsAndServicesSold us-gaap:ProductOrService ar:Exploration█▁▁▁▁▁▁▁▁▁▂▂▃▃▅▃▃▄5.6380.2190.1880.4540.2310.210.2360.2080.3140.1260.9360.6661.4711.8853.0281.5991.8042.107
 us-gaap:CostOfGoodsAndServicesSold us-gaap:ProductOrService ar:Marketings▇▅▄▄▃▂▄▃▄▅▃▅█▇▃▁▁▂198.994162.077134.498128.58113.05393.273140.975108.216137.539163.084125.131151.764213.42195.739119.98378.88477.42189.993
 us-gaap:CostOfGoodsAndServicesSold us-gaap:ProductOrService us-gaap:NaturalGasGatheringTransportationMarketingAndProcessing█▇███▇▆▇▆▄▃▂▂▁▁▁641.362605.077653.754656.615631.845588.624551.424603.86566.834424.529413.13326.504307.786291.938279.929282.134NANA
 us-gaap:CostOfGoodsAndServicesSold us-gaap:ProductOrService us-gaap:OilAndGasOperationAndMaintenance▁▂▃▁▂▂▃▆▇██▆▄▃▅▂21.64524.54727.02921.4524.74225.64427.20335.92840.85741.73242.99836.26930.16426.72233.02323.491NANA
us-gaap:CostsAndExpenses ▃▃▃▃▃▃▃█▄▃▃▃▃▂▂▁▁▁1132.3181109.6581163.9411134.71091.8331054.6721020.1942104.7591199.6681071.1141092.2791071.7281022.107881.607834.667719.932666.646694.236
us-gaap:GainsLossesOnExtinguishmentOfDebt ▂▁▃▇▆█-23.065-43.2040.59755.63339.17180.561NANANANANANANANANANANANA
 us-gaap:GainsLossesOnExtinguishmentOfDebt us-gaap:LongtermDebtType,us-gaap:TypeOfArrangement ar:ConvertibleSeniorNotes4.25PercentDue2026,ar:ConvertibleNoteRepurchaseWithShareOffering█▁2.0-43.0NANANANANANANANANANANANANANANANA
 us-gaap:GainsLossesOnExtinguishmentOfDebt us-gaap:LongtermDebtType,us-gaap:TypeOfArrangement ar:ConvertibleSeniorNotes4.25PercentDue2026,ar:ConvertibleNoteRepurchaseWithShareOfferingInMay21.0NANANANANANANANANANANANANANANANANA
us-gaap:GeneralAndAdministrativeExpense ▁▃▁▁▂▁▁▂▃█▆▆▇▆▆▇▇▇32.17744.07433.21831.6438.40331.22132.18935.92342.38268.20258.76859.8661.68760.0360.19662.20364.09964.698
us-gaap:IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest ▂▄▅▂▃▃▃▁▄█▄▄▄▅▅▄▄▆-710.417-14.05118.998-722.624-605.472-448.795-589.638-1151.49159.4171314.466-112.621-59.019-92.84889.93129.476-135.07858.784436.904
us-gaap:IncomeTaxExpenseBenefit ▃▅▅▃▄▄▄▂▅█▄▅▅▅▁▅▅▆-175.966-2.94623.685-168.778-142.404-109.985-107.442-272.62717.249288.71-131.35718.953-25.5739.12-400.138-45.07818.819131.346
 us-gaap:InterestExpenseDebt us-gaap:LongtermDebtType ar:ConvertibleSeniorNotes4.25PercentDue2026▁█2.84.4NA2.3NANANANANANANANANANANANANANA
us-gaap:InterestIncomeExpenseNet ▇█▇▇▆▆▆▇▆▂▁▂▃-49.963-42.743-46.916-48.043-51.811-53.102-54.243-47.754-54.164-71.95-78.44-74.528-69.349NANANANANA
us-gaap:InterestPaidNet ▁▂▄▂▆▂▇▁▇▂█▄▇▃▇▃▇▂23.02935.09756.80833.60971.79630.08982.04323.10882.09937.08196.2849.25888.22142.0189.59549.0489.51435.77
us-gaap:NetIncomeLossAttributableToNoncontrollingInterest ▂▅█▁▄-10.9844.39525.483-18.2330.236NA0.00.00.046.993140.28276.44769.1165.97742.74545.06345.09737.162
us-gaap:NetIncomeLossAvailableToCommonStockholdersBasic ▂▄▅▂▃▃▂▁▄█▄▄▄▄▆▄▄▅-523.467-15.49969.83-535.613-463.304-338.81-482.196-878.86442.168978.763-121.546-154.419-136.38514.833486.869-135.063-5.132268.396
 us-gaap:NetIncomeLossAvailableToCommonStockholdersBasic us-gaap:ConsolidatedEntities ar:ParentCompanyAndGuarantorSubsidiaries▁█-523.467-15.499NANANANANANANANANANANANANANANANA
 us-gaap:NetIncomeLossAvailableToCommonStockholdersBasic us-gaap:ConsolidatedEntities srt:ParentCompanyNANA-441.139NANANANANANANANANANANANANANANA
us-gaap:NonoperatingIncomeExpense ▃▃▃▄▃▁▂▃▃█▃▃▃▃▃▃▃▃-67.467-108.59-26.15331.4851.45-711.228-522.182-165.613-40.5791348.173-65.992-63.823-60.085-56.564-57.583-63.026-64.959-64.439
us-gaap:OperatingIncomeLoss ▃▆▆▂▃▇▅▁▆▅▅▆▅▆▇▅▆█-642.9594.54145.151-754.109-606.922262.433-67.456-985.87899.996-33.707-46.634.804-32.763146.494187.059-72.052123.743501.343
 us-gaap:OperatingIncomeLoss us-gaap:ConsolidatedEntities ar:ParentCompanyAndGuarantorSubsidiaries▁█-631.96690.145NANANANANANANANANANANANANANANANA
 us-gaap:OperatingIncomeLoss us-gaap:ConsolidatedEntities srt:ParentCompanyNANA-330.557NANANANANANANANANANANANANANANA
 us-gaap:OperatingIncomeLoss us-gaap:ConsolidationItems us-gaap:IntersegmentElimination▁▁▁▁▁█▅▆▁▃▂▂▂▂▂▂▂▂-151.399-133.587-114.983-151.817-134.726519.164192.691334.089-117.59145.314-41.46-66.643-67.532-62.625-43.935-40.862-52.655-44.398
 us-gaap:OperatingIncomeLoss us-gaap:ConsolidationItems,us-gaap:StatementBusinessSegments us-gaap:OperatingSegments,ar:AnteroMidstream▇▇▇▇▇▁▄▃▇▆█▇▇▇151.399133.587114.983151.817134.726-522.46-192.693-341.889117.59121.251255.059125.781110.719111.316NANANANA
 us-gaap:OperatingIncomeLoss us-gaap:ConsolidationItems,us-gaap:StatementBusinessSegments us-gaap:OperatingSegments,ar:ExplorationAndProduction▃▆▆▂▃▇▅▁▆▅▅▆▅▆▇▅▆█-609.40991.827170.932-717.026-558.154309.633-17.775-916.507174.455-28.374-199.8097.874-22.62254.919213.966-86.02111.507488.338
 us-gaap:OperatingIncomeLoss us-gaap:ConsolidationItems,us-gaap:StatementBusinessSegments us-gaap:OperatingSegments,ar:Marketing▃▆▄▃▃▃▂▂▁▁▂▂▂█▂▄▄▄-33.5412.713-25.781-37.083-48.768-47.2-49.679-61.571-74.459-71.898-60.419-62.208-53.32842.884-49.991-28.117-27.453-24.069
 us-gaap:OperatingIncomeLoss us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName,us-gaap:EquityMethodInvestmentNonconsolidatedInvestee ar:AnteroMidstream,us-gaap:EquityMethodInvestmentNonconsolidatedInvesteeOrGroupOfInvestees█▁151.399133.587NA151.817134.726-519.164NANA-192.419NANANANANANANANANA
us-gaap:ProfitLoss ▂▄▅▂▃▃▂▁▄█▄▄▄▅▆▄▄▅-534.451-11.10495.313-553.846-463.068-338.81-482.196-878.86442.1681025.75618.736-77.972-67.27580.81529.614-90.039.965305.558
 us-gaap:ProfitLoss us-gaap:ConsolidatedEntities ar:ParentCompanyAndGuarantorSubsidiaries▁█-523.467-15.499NANANANANANANANANANANANANANANANA
 us-gaap:ProfitLoss us-gaap:ConsolidatedEntities srt:ParentCompanyNANA-423.142NANANANANANANANANANANANANANANA
 us-gaap:ProfitLoss us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName,us-gaap:EquityMethodInvestmentNonconsolidatedInvestee ar:AnteroMidstream,us-gaap:EquityMethodInvestmentNonconsolidatedInvesteeOrGroupOfInvestees▁█80.22383.441NA105.50788.441-392.933NANA-197.006NANANANANANANANANA
 us-gaap:ProfitLoss us-gaap:StatementEquityComponents us-gaap:NoncontrollingInterest▁█-10.9844.395NA-18.2330.236NANANANA46.993NA76.44769.1165.97742.74545.06345.09737.162
 us-gaap:ProfitLoss us-gaap:StatementEquityComponents us-gaap:RetainedEarnings▁█-523.467-15.499NA-535.613-463.304-338.81NA-878.86442.168978.763NA-154.419-136.38514.833486.869-135.063-5.132268.396
us-gaap:RevenueFromContractWithCustomerIncludingAssessedTax ▇█▅▃▁▂▄▃▄▆▇▅▄▄▃▂▂▂1308.261370.1641102.292889.492652.219750.474959.801896.612969.4771114.6681268.0351019.555934.118911.43843.296713.837704.748756.804
us-gaap:Revenues ▂▇█▁▂█▅▇█▆▆▆▆▆▆▃▄▇489.3681204.1981309.092380.591484.9111317.105952.7381118.8811299.6641037.4071045.6491076.532989.3441028.1011021.726647.88790.3891195.579
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
us-gaap:Assets ▁▁▁▂▂▄▅▆██▅▆▅▅▅▄▅▄12848.33313000.38213150.84513349.73913743.9914525.78915197.56916120.28817330.8817288.7315519.46415802.53515690.60715422.84915261.4914849.21415442.22114888.654
us-gaap:Liabilities ▃▂▃▄▃▅▆▇██▃▃▂▁▁▁▃▂7129.9196772.4337060.5747365.8587311.0117933.2498226.8268673.598991.188995.9327031.9877131.3836887.6966501.7516385.3546461.9527139.3596634.702
us-gaap:LiabilitiesAndStockholdersEquity ▁▁▁▂▂▄▅▆██▅▆▅▅▅▄▅▄12848.33313000.38213150.84513349.73913743.9914525.78915197.56916120.28817330.8817288.7315519.46415802.53515690.60715422.84915261.4914849.21415442.22114888.654
us-gaap:StockholdersEquity ▁▂▂▂▃▄▅▆██▆▇▇██▆▆▆5397.4655874.6875767.7055668.1276136.1566592.546970.7437446.6988339.78292.7987665.8087913.6138054.2218181.1458149.1817655.6717661.467638.699
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
us-gaap:AssetsCurrent ▂▂▂▁▅█▆▄▃▁▄▆▅▄▅▂▄▁550.44586.307574.139521.782842.2771120.021922.885729.5713.049544.896806.613906.632834.93800.034833.087610.953735.883503.698
us-gaap:CashAndCashEquivalentsAtCarryingValue 4.541NANANANANANANANANANANA50.60823.15328.44123.69440.19NA
us-gaap:CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents 4.541NANANA0.00.00.0NA0.00.00.0NA50.60823.15328.44123.694NANA
us-gaap:AccountsReceivableNetCurrent ▃█▂█▅█▄▂▄▄▄▄▃▂▃▄▁▃36.14586.65728.45788.06257.01391.94446.41929.20749.99448.97951.07346.60435.67626.69234.89643.85416.49436.874
us-gaap:OtherAssetsCurrent ▃▂▃▂▂▂▂▁▁▁█▂▁▂▂▂▁▂14.95811.78115.23811.9348.94210.31310.7317.3427.48.34135.4512.6646.5910.3748.94310.0248.5739.679
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
 us-gaap:AssetsNoncurrent us-gaap:ConsolidatedEntities ar:ParentCompanyAndGuarantorSubsidiaries▁▄█11536.43911636.09911783.502NANANANANANANANANANANANANANANA
 us-gaap:AssetsNoncurrent us-gaap:ConsolidatedEntities srt:GuarantorSubsidiariesNANANA202.452NANA812.129NANANANANANANANANANANA
 us-gaap:AssetsNoncurrent us-gaap:ConsolidatedEntities srt:ParentCompanyNANA11783.50211813.11NANA14274.684NANANANANANANANANANANA
 us-gaap:AssetsNoncurrent us-gaap:Ownership ar:AnteroMidstreamNANA5516.981NANANA6174.32NANANANANANANANANANANA
 us-gaap:AssetsNoncurrent us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName,us-gaap:EquityMethodInvestmentNonconsolidatedInvestee ar:AnteroMidstream,us-gaap:EquityMethodInvestmentNonconsolidatedInvesteeOrGroupOfInvestees▁▁▅█5448.3045455.5935516.9815565.496NANA6174.32NANANANANANANANANANANA
 us-gaap:InvestmentsInAffiliatesSubsidiariesAssociatesAndJointVentures dei:LegalEntity ar:AnteroMidstreamPartnersLpNANA255.082NANANA1055.177NANANA433.642392.893358.83321.468303.302NANANA
 us-gaap:InvestmentsInAffiliatesSubsidiariesAssociatesAndJointVentures us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName ar:AnteroMidstreamNANA255.082NA279.805291.9891055.1771819.3231967.2031989.612NANANANANANANANA
 us-gaap:InvestmentsInAffiliatesSubsidiariesAssociatesAndJointVentures us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName,us-gaap:EquityMethodInvestmentNonconsolidatedInvestee ar:AnteroMidstream,us-gaap:EquityMethodInvestmentNonconsolidatedInvesteeOrGroupOfInvestees▁▂▄█237.668241.158255.082272.926NANA1055.177NANANANANANANANANANANA
us-gaap:OperatingLeaseRightOfUseAsset ▁▁▂▂▂▃▄▆▇█2486.0442549.2972613.6032660.1882562.9452814.5392886.53230.1483330.7953433.515NANANANANANANANA
us-gaap:OtherAssetsNoncurrent ▁▁▁▂▂▃▃▃▅▅▇▇█▇▇▆▅▆10.94412.40313.7916.21518.31920.03921.09421.38834.88335.44847.12545.82352.10447.03748.29138.92836.63137.804
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
us-gaap:AccountsPayableCurrent ▃▃▂▄▃▃▁▃▄▄▅██▆▅▄▄▃39.61241.9926.72855.17336.73637.90914.49832.49644.75848.09666.28991.9496.47773.22162.98247.45751.56737.706
us-gaap:AccruedIncomeTaxesCurrent NA24.38640.79620.403NANA39.332NANANANANANANANANANANA
us-gaap:AccruedLiabilitiesCurrent ▆▂▁▁▁▃▄▄▂▄██▇▆▇▆▅▅433.05350.763343.524344.606339.388367.444400.85392.726358.68384.707465.07457.216438.829422.617443.225429.696418.352416.588
us-gaap:LiabilitiesCurrent █▄▃▃▂▃▃▄▄▄▂▂▂▂▁▁▁▁1883.0971221.328983.0541035.375864.24971.8741040.1391171.1681221.1071266.781853.54813.871788.733789.853762.096717.676693.06723.436
us-gaap:OperatingLeaseLiabilityCurrent ▅▄▄▃▁▇█269.07264.858265.178250.594229.415294.535304.397NANANANANANANANANANANA
us-gaap:OtherAccruedLiabilitiesCurrent ▂▂▁▁▄▃▆▄▅▅▇▇▇▆█▇▇▅35.08834.1923.79423.90657.61748.74777.54557.70969.63568.45993.27589.93193.33478.64599.16584.33985.14670.398
us-gaap:OtherLiabilitiesCurrent ▅▂▁▁▃▃▃▂▂▂▅▄▅▆█▇█▇11.984.6882.3022.4676.8317.3156.8794.3674.1024.93510.8228.42711.53214.20117.79615.26716.71116.09
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
 us-gaap:LiabilitiesNoncurrent us-gaap:ConsolidatedEntities ar:ParentCompanyAndGuarantorSubsidiaries▁▄█5226.1925540.0276070.388NANANANANANANANANANANANANANANA
 us-gaap:LiabilitiesNoncurrent us-gaap:ConsolidatedEntities srt:ParentCompanyNANA6070.3886322.233NANA7186.687NANANANANANANANANANANA
 us-gaap:LiabilitiesNoncurrent us-gaap:Ownership ar:AnteroMidstreamNANA3098.621NANANA2897.38NANANANANANANANANANANA
 us-gaap:LiabilitiesNoncurrent us-gaap:Range,us-gaap:Restatement,us-gaap:StatementScenario,us-gaap:AdjustmentsForNewAccountingPronouncements srt:Maximum,srt:RestatementAdjustment,srt:ScenarioForecast,ar:AccountingStandardsUpdate202006NANANANANANANANANANANANANANANANANANA
 us-gaap:LiabilitiesNoncurrent us-gaap:Range,us-gaap:Restatement,us-gaap:StatementScenario,us-gaap:AdjustmentsForNewAccountingPronouncements srt:Minimum,srt:RestatementAdjustment,srt:ScenarioForecast,ar:AccountingStandardsUpdate202006NANANANANANANANANANANANANANANANANANA
 us-gaap:LiabilitiesNoncurrent us-gaap:Restatement,us-gaap:AdjustmentsForNewAccountingPronouncements srt:RestatementAdjustment,ar:AccountingStandardsUpdate202006NANANANANANANANANANANANANANANANANANA
 us-gaap:LiabilitiesNoncurrent us-gaap:Restatement,us-gaap:StatementScenario,us-gaap:AdjustmentsForNewAccountingPronouncements srt:RestatementAdjustment,srt:ScenarioForecast,ar:AccountingStandardsUpdate202006NANANANANANANANANANANANANANANANANANA
 us-gaap:LiabilitiesNoncurrent us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName,us-gaap:EquityMethodInvestmentNonconsolidatedInvestee ar:AnteroMidstream,us-gaap:EquityMethodInvestmentNonconsolidatedInvesteeOrGroupOfInvestees▁▄▂█3094.4693110.1443098.6213126.754NANA2897.38NANANANANANANANANANANA
us-gaap:LongTermDebtNoncurrent ▁▁▂▃▄▄▄▄▄▃███▇▆▆█▆2415.1632568.6863001.5933158.2253518.0763707.7873758.8683703.8283602.3793475.955461.6885487.0045288.3444876.7064800.094510.5215291.9734775.302
us-gaap:DeferredFinanceCostsNoncurrentNet NANA16.0NANANA19.0NANANANANANANANANANANA
us-gaap:DeferredIncomeTaxLiabilitiesNet ▁▃▃▃▅▇█214.292395.244412.252381.233529.598672.002781.987NANANA650.788NANANANANANANA
us-gaap:MinorityInterest ▄█▄▃▁320.949353.262322.566315.754296.823NANANANANA821.669757.539748.69739.953726.955731.591641.402615.253
us-gaap:OtherLiabilitiesNoncurrent ▆▅▆▇▇▆▆▆▆▅█▃▂▂▁▄▄▄58.18456.85659.69464.22362.31260.43258.63559.36657.96556.75365.97148.36347.42746.42743.31652.76453.77254.299
us-gaap:OperatingLeaseLiabilityNoncurrent ▁▂▄▅▃▇█2216.9742284.4392348.4252409.5942333.532520.0042582.103NANANANANANANANANANANA
us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearTwo ▁▂█▇574.333575.235579.079578.305NANA554.0NANANANANANANANANANANA
us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearThree ▁▂██565.566566.467575.228575.228NANA542.952NANANANANANANANANANANA
us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearFour ▁▁██493.563493.79566.461566.46NANA538.771NANANANANANANANANANANA
us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearFive ▁▁██442.971442.971493.783493.783NANA530.003NANANANANANANANANANANA
us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueAfterYearFive ▁▁██1115.4991115.4991558.471558.47NANA1851.738NANANANANANANANANANANA
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
us-gaap:StockholdersEquity ▁▂▂▂▃▄▅▆██▆▇▇██▆▆▆5397.4655874.6875767.7055668.1276136.1566592.546970.7437446.6988339.78292.7987665.8087913.6138054.2218181.1458149.1817655.6717661.467638.699
us-gaap:StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest ▁▂▂▂▃▃▄▅▇▇▇▇███▇▇▇5718.4146227.9496090.2715983.8816432.9796592.546970.7437446.6988339.78292.7988487.4778671.1528802.9118921.0988876.1368387.2628302.8628253.952
us-gaap:CommonStockValue ▇▆▁▁▁▁▅▆▇▇▇███████3.1353.0112.6862.6852.6842.6892.9593.0413.0913.0873.0863.1713.1713.1653.1643.1553.1543.15
us-gaap:AdditionalPaidInCapital ▅▄▂▂▁▁▂▁▂▂▆███▇▇▆▅6363.7746317.6536195.4976165.756098.1676091.2426130.3656124.0426138.136133.46485.1746611.3486597.5376588.0826570.9526564.326435.0476407.158
us-gaap:RetainedEarningsAccumulatedDeficit ▁▂▂▂▃▄▅▆██▆▆▆▇▇▆▆▆-969.444-445.977-430.478-500.30835.305498.609837.4191319.6152198.4792156.3111177.5481299.0941453.5131589.8981575.0651088.1961223.2591228.391
us-gaap:MinorityInterest ▄█▄▃▁320.949353.262322.566315.754296.823NANANANANA821.669757.539748.69739.953726.955731.591641.402615.253
us-gaap:StockIssuedDuringPeriodValueNewIssues ▁█125.378238.865NANANANANANANANANANANANANANANANA
us-gaap:AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue ▁█4.2495.642NA5.6997.9733.329NA3.8756.5498.903NA16.20219.07121.15624.5226.44726.97525.503
us-gaap:MinorityInterestDecreaseFromDistributionsToNoncontrollingInterestHolders ▁█21.32924.699NA13.8363.413NANANANA1143.783NA69.75263.10855.91550.29940.18434.7227.149
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
us-gaap:NetCashProvidedByUsedInOperatingActivities ▂▄▂▁▁▂▁▂▂▄▆▃▂▄▂█▂▃308.541563.731243.13175.87115.963200.677147.94198.41218.104539.004821.589421.458297.391541.549313.4831045.222253.647393.939
us-gaap:NetCashProvidedByUsedInInvestingActivities ▆▆▆█▅▆▅▅▄▆▂▂▂▂▃▂▁▁-179.903-122.975-145.99865.545-262.927-186.681-216.163-279.741-340.769-204.817-580.385-597.992-608.778-563.569-513.323-550.765-709.069-688.473
us-gaap:NetCashProvidedByUsedInFinancingActivities ▄▁▄▃▆▄▅▅▅▇▃▅▇▅▆▁█▆-124.097-440.756-97.132-241.415146.964-13.99668.22381.331122.665285.345-241.204125.926338.84216.732204.587-510.953495.612262.924
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
us-gaap:DeferredIncomeTaxExpenseBenefit ▃▅▅▃▄▄▄▂▅█▄▅▅▅▁▅▅▆-175.966-2.94628.785-173.878-142.404-109.985-111.177-272.94417.109287.854-131.35718.953-25.5739.12-400.213-45.07818.819131.346
us-gaap:DepreciationDepletionAndAmortization ▁▂▃▆▃▂▁▆▆▆█▆▆▅▃▃▂▂187.33194.026209.74238.418214.035199.677190.861241.503242.302240.201262.985243.186238.05228.244213.731206.968201.182202.729
us-gaap:IncreaseDecreaseInAccountsPayable ▄█▃█▂▅▁▅█▂▅▆▇▄▆▆▄▇-9.84616.527-17.08418.984-19.931-1.251-27.0251.45318.946-21.371.135.22910.99-8.0424.7312.659-10.47312.545
us-gaap:IncreaseDecreaseInAccountsReceivable ▄▅▄▃▂█▃▃▇▁▅▄▄▃▅▅▃▅0.4877.2-5.962-11.875-27.18554.514-17.395-8.38836.32-42.16819.8095.584-2.033-8.2046.98511.417-20.387.192
us-gaap:NetCashProvidedByUsedInOperatingActivities ▂▄▂▁▁▂▁▂▂▄▆▃▂▄▂█▂▃308.541563.731243.13175.87115.963200.677147.94198.41218.104539.004821.589421.458297.391541.549313.4831045.222253.647393.939
us-gaap:ProfitLoss ▂▄▅▂▃▃▂▁▄█▄▄▄▅▆▄▄▅-534.451-11.10495.313-553.846-463.068-338.81-482.196-878.86442.1681025.75618.736-77.972-67.27580.81529.614-90.039.965305.558
 us-gaap:ProfitLoss us-gaap:ConsolidatedEntities ar:ParentCompanyAndGuarantorSubsidiaries▁█-523.467-15.499NANANANANANANANANANANANANANANANA
 us-gaap:ProfitLoss us-gaap:ConsolidatedEntities srt:ParentCompanyNANA-423.142NANANANANANANANANANANANANANANA
 us-gaap:ProfitLoss us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName,us-gaap:EquityMethodInvestmentNonconsolidatedInvestee ar:AnteroMidstream,us-gaap:EquityMethodInvestmentNonconsolidatedInvesteeOrGroupOfInvestees▁█80.22383.441NA105.50788.441-392.933NANA-197.006NANANANANANANANANA
 us-gaap:ProfitLoss us-gaap:StatementEquityComponents us-gaap:NoncontrollingInterest▁█-10.9844.395NA-18.2330.236NANANANA46.993NA76.44769.1165.97742.74545.06345.09737.162
 us-gaap:ProfitLoss us-gaap:StatementEquityComponents us-gaap:RetainedEarnings▁█-523.467-15.499NA-535.613-463.304-338.81NA-878.86442.168978.763NA-154.419-136.38514.833486.869-135.063-5.132268.396
us-gaap:ShareBasedCompensation ▁▂▂▂▂▁▁▁▂▃▄▅▆▆▇███4.2495.6426.3165.6997.9733.3294.2323.8756.5498.90313.98516.20219.07121.15624.5226.44726.97525.503
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
us-gaap:NetCashProvidedByUsedInInvestingActivities ▆▆▆█▅▆▅▅▄▆▂▂▂▂▃▂▁▁-179.903-122.975-145.99865.545-262.927-186.681-216.163-279.741-340.769-204.817-580.385-597.992-608.778-563.569-513.323-550.765-709.069-688.473
us-gaap:PaymentsToAcquirePropertyPlantAndEquipment ▂▁▁▁▃▃▃▃▄▅▆▇▇▆▆▆█▆182.591123.158147.955151.269263.522311.611315.793292.176342.253471.933534.341567.221563.061545.963499.214521.657679.648516.234
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
us-gaap:NetCashProvidedByUsedInFinancingActivities ▄▁▄▃▆▄▅▅▅▇▃▅▇▅▆▁█▆-124.097-440.756-97.132-241.415146.964-13.99668.22381.331122.665285.345-241.204125.926338.84216.732204.587-510.953495.612262.924
us-gaap:PaymentsForRepurchaseOfCommonStock NANA0.00.00.75342.6920.848NANANANANANANANANANANA
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
us-gaap:DebtInstrumentInterestRateStatedPercentage NANANANANANANANANANANANANANANANANANA

Common Stock Value

us-gaap:CommonStockValue

us-gaap:CommonStockValue


Common
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-31
Value3.1353.0112.6862.6852.6842.6892.9593.0413.0913.0873.0863.1713.1713.1653.1643.1553.1543.153.1493.0723.0422.7712.772.772.772.7682.6212.6212.622.622.62
Percentage of CommonStockValue100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

Shares Issued

us-gaap:SharesIssued us-gaap:StatementEquityComponents

us-gaap:SharesIssued

us-gaap:CommonStock


Shares
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312014-12-312013-12-31
Value2682682682682953043093083080.3170860.3170520.3165243160.315470.3154480.315006314307304277277262262
Percentage of SharesIssued100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Common Stock Shares Issued

us-gaap:CommonStockSharesIssued

us-gaap:CommonStockSharesIssued


Common
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-10-152012-12-31
Value313301268268268268295304309308308317317316316315315315314307304277277277277276262262262262262224262
Percentage of CommonStockSharesIssued100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Common Stock Shares Outstanding

us-gaap:CommonStockSharesOutstanding

us-gaap:CommonStockSharesOutstanding


Common
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-10-152012-12-31
Value313301268268268268295304309308308317317316316315315315314307304277277277277276262262262262262224262
Percentage of CommonStockSharesOutstanding100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Weighted Average Number Of Diluted Shares Outstanding

us-gaap:WeightedAverageNumberOfDilutedSharesOutstanding

us-gaap:WeightedAverageNumberOfDilutedSharesOutstanding


Weighted
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-312017-09-302017-06-302017-03-312016-09-302016-06-302016-03-312015-09-302015-06-302015-03-312014-09-302014-06-302014-03-312013-09-30
Value307296268268284307309308317316316315315315308281277277277265262262262262
Percentage of WeightedAverageNumberOfDilutedSharesOutstanding100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:WeightedAverageNumberOfDilutedSharesOutstanding us-gaap:AdjustmentsForNewAccountingPronouncements

ar:AccountingStandardsUpdate202006


Weighted
Period End2021-03-31
Value15
Percentage of WeightedAverageNumberOfDilutedSharesOutstanding5.1

us-gaap:WeightedAverageNumberOfDilutedSharesOutstanding us-gaap:Restatement, us-gaap:AdjustmentsForNewAccountingPronouncements

srt:RestatementAdjustment, ar:AccountingStandardsUpdate202006


Weighted
Period End2021-03-31
Value32
Percentage of WeightedAverageNumberOfDilutedSharesOutstanding10.8

us-gaap:WeightedAverageNumberOfDilutedSharesOutstanding us-gaap:Restatement, us-gaap:StatementScenario, us-gaap:AdjustmentsForNewAccountingPronouncements, us-gaap:LongtermDebtType

srt:RestatementAdjustment, srt:ScenarioForecast, ar:AccountingStandardsUpdate202006, ar:ConvertibleSeniorNotes4.25PercentDue2026


Weighted
Period End2022-01-01
Value63
Percentage of WeightedAverageNumberOfDilutedSharesOutstanding0.0

Weighted Average Number Of Shares Outstanding Basic

us-gaap:WeightedAverageNumberOfSharesOutstandingBasic

us-gaap:WeightedAverageNumberOfSharesOutstandingBasic


Weighted
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-312017-09-302017-06-302017-03-312016-09-302016-06-302016-03-312015-09-302015-06-302015-03-312014-09-302014-06-302014-03-312013-09-30
Value307296268268284307309308317316316315315314306281277277277265262262262262
Percentage of WeightedAverageNumberOfSharesOutstandingBasic100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Antidilutive Securities Excluded From Computation Of Earnings Per Share Amount

us-gaap:AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount us-gaap:AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareByAntidilutiveSecurities

us-gaap:AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount

ar:ConvertibleSeniorNotes4.25PercentDue2026


Antidilutive
Period End2021-06-302021-03-31
Value1815
Percentage of AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount100.0100.0

ar:RestrictedStockAndRestrictedStockUnit


Antidilutive
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-312017-09-302017-06-302017-03-312016-09-302016-06-302016-03-312015-09-302015-06-302015-03-312014-09-302014-06-30
Value6.6426.455106.1655.9522.3562.2841.4452.8132.8990.4215.0545.1051.5091.2516.9826.7406022.4833632.3766611.9707741.9067781.956015
Percentage of AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount35.442.20.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:EmployeeStockOption


Antidilutive
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-312017-09-302017-06-302017-03-312016-09-302016-06-302016-03-312015-09-302015-06-302015-03-312014-09-302014-06-30
Value0.380.4270.4320.4540.4590.5140.5380.570.6190.6390.6530.6740.6790.6830.6930.7060.7202060.7425540.6436970.0810210.060.070339
Percentage of AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount2.02.80.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:PerformanceShares


Antidilutive
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-312017-09-302017-06-302017-03-312016-09-302016-06-302016-03-31
Value2.7691.8631.9881.5951.6212.6762.5921.7211.881.861.1891.2931.2130.660.660.7240.214286
Percentage of AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount14.712.20.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

Earnings Per Share Basic

us-gaap:EarningsPerShareBasic

us-gaap:EarningsPerShareBasic


Earnings
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-31
Value-1.7-0.050.26-1.99-1.73-1.19-1.61-2.860.143.17-0.39-0.49-0.430.051.54-0.43-0.020.85-1.550.78-2.12-0.020.571.93-0.521.492.310.78-0.16-0.36-0.850.460.5-0.18-0.03-0.49-1.821.25
Percentage of EarningsPerShareBasic100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Earnings Per Share Diluted

us-gaap:EarningsPerShareDiluted

us-gaap:EarningsPerShareDiluted


Earnings
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-31
Value-1.7-0.050.24-1.99-1.73-1.19-1.61-2.190.143.17-0.39-0.49-0.430.051.54-0.43-0.020.85-1.550.77-2.12-0.020.571.93-0.521.492.310.78-0.16-0.36-0.850.460.5-0.18-0.03-0.49-1.821.25
Percentage of EarningsPerShareDiluted100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Cost Of Goods And Services Sold

us-gaap:CostOfGoodsAndServicesSold us-gaap:ConsolidationItems, us-gaap:ProductOrService

us-gaap:CostOfGoodsAndServicesSold

us-gaap:IntersegmentElimination, us-gaap:NaturalGasGatheringTransportationMarketingAndProcessing


Cost
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-30
Value-39.555-39.314-36.539-38.052-42.067-55.908-12.655-13.091-12.311-113.421-156.194-128.799-114.322-103.775-101.333-97.872
Percentage of CostOfGoodsAndServicesSold100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax-3.0-2.90.0-4.3-6.4-7.40.0-1.5-1.3-10.20.0-12.6-12.2-11.40.0-13.7
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax us-gaap:IntersegmentElimination us-gaap:NaturalGasGatheringTransportationMarketingAndProcessing0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

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

us-gaap:OperatingSegments, us-gaap:NaturalGasGatheringTransportationMarketingAndProcessing, ar:AnteroMidstream


Cost
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value3939363842551213122.93513121211
Percentage of CostOfGoodsAndServicesSold-100.0-100.0-100.0-100.0-100.0-100.0-100.3-100.0-100.0-2.6-8.4-9.9-10.8-11.0
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax3.02.90.04.36.47.40.01.51.30.30.01.21.31.2
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax us-gaap:OperatingSegments us-gaap:NaturalGasGatheringTransportationMarketingAndProcessing ar:AnteroMidstream0.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:OperatingSegments, us-gaap:NaturalGasGatheringTransportationMarketingAndProcessing, ar:ExplorationAndProduction


Cost
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-30
Value641605653656631588551603566535556442409384370369
Percentage of CostOfGoodsAndServicesSold-1621.4-1539.1-1789.2-1725.6-1502.0-1052.8-4357.1-4612.8-4604.3-471.7-356.1-343.6-358.4-370.4-365.7-377.6
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax49.044.20.073.896.978.40.067.358.548.00.043.443.942.20.051.8
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax us-gaap:OperatingSegments us-gaap:NaturalGasGatheringTransportationMarketingAndProcessing ar:ExplorationAndProduction0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:OperatingSegments, us-gaap:OilAndGasOperationAndMaintenance, ar:ExplorationAndProduction


Cost
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-30
Value21242721242527354042433532313624
Percentage of CostOfGoodsAndServicesSold-54.7-62.4-74.0-56.4-58.8-45.9-215.2-274.4-331.9-37.9-27.9-27.3-28.3-30.1-36.3-24.6
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax1.71.80.02.43.83.40.04.04.23.90.03.43.53.40.03.4
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax us-gaap:OperatingSegments us-gaap:OilAndGasOperationAndMaintenance ar:ExplorationAndProduction0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:CostOfGoodsAndServicesSold us-gaap:ProductOrService

ar:Exploration


Cost
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value5.6380.2190.1880.4540.2310.210.2360.2080.3140.1260.9360.6661.4711.8853.0281.5991.8042.107
Percentage of CostOfGoodsAndServicesSold-14.3-0.6-0.5-1.2-0.5-0.4-1.9-1.6-2.6-0.1-0.6-0.5-1.3-1.8-3.0-1.60.00.0
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax0.40.00.00.10.00.00.00.00.00.00.00.10.20.20.00.20.30.3
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax ar:Exploration0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0100.0

ar:Marketings


Cost
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value19816213412811393140108137163125151213195119787789
Percentage of CostOfGoodsAndServicesSold-503.1-412.3-368.1-337.9-268.7-166.8-1114.0-826.6-1117.2-143.8-80.1-117.8-186.7-188.6-118.4-80.60.00.0
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax15.211.80.014.517.312.40.012.114.214.60.014.922.821.50.011.111.011.9
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax ar:Marketings120.398.40.0140.5175.9202.40.0232.0218.0178.80.0169.4133.2135.60.0155.4154.9136.5

us-gaap:NaturalGasGatheringTransportationMarketingAndProcessing


Cost
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-30
Value641605653656631588551603566424413326307291279282
Percentage of CostOfGoodsAndServicesSold-1621.4-1539.1-1789.2-1725.6-1502.0-1052.8-4357.4-4612.8-4604.3-374.3-264.5-253.5-269.2-281.3-276.2-288.3
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax49.044.20.073.896.978.40.067.358.538.10.032.032.932.00.039.5
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax us-gaap:NaturalGasGatheringTransportationMarketingAndProcessing0.00.00.00.00.00.00.00.00.09478.20.06740.45577.95915.70.09833.9

us-gaap:OilAndGasOperationAndMaintenance


Cost
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-30
Value21242721242527354041423630263323
Percentage of CostOfGoodsAndServicesSold-54.7-62.4-74.0-56.4-58.8-45.9-215.0-274.4-331.9-36.8-27.5-28.2-26.4-25.7-32.6-24.0
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax1.71.80.02.43.83.40.04.04.23.70.03.63.22.90.03.3
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax us-gaap:OilAndGasOperationAndMaintenance0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

Costs And Expenses

us-gaap:CostsAndExpenses

us-gaap:CostsAndExpenses


Costs
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-31
Value1132110911631134109110541020210411991071109210711022881834719666694788649640642591502540529454381316269
Percentage of CostsAndExpenses100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax86.681.00.0127.6167.4140.50.0234.7123.796.10.0105.1109.496.70.0100.994.691.70.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:CostsAndExpenses us-gaap:ConsolidatedEntities

ar:ParentCompanyAndGuarantorSubsidiaries


Costs
Period End2021-06-302021-03-31
Value11221098
Percentage of CostsAndExpenses99.199.0
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax85.880.2
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax ar:ParentCompanyAndGuarantorSubsidiaries0.092.4

srt:ParentCompany


Costs
Period End2020-12-31
Value1630
Percentage of CostsAndExpenses140.1
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax0.0
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax srt:ParentCompany0.0

us-gaap:CostsAndExpenses us-gaap:ConsolidationItems

us-gaap:IntersegmentElimination


Costs
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-30
Value-81.388-90.534-88.877-81.598-85.01-762.872-431.76-577.884-138.027-96.594-130.522-199.914-183.104-167.906-168.279-152.968-141.831-132.207-121.034-107.974-107.038-110.382-95.752-60.096-59.861-56.725-49.926-32.463
Percentage of CostsAndExpenses-7.2-8.2-7.6-7.2-7.8-72.3-42.3-27.5-11.5-9.0-11.9-18.7-17.9-19.0-20.2-21.2-21.3-19.0-15.4-16.6-16.7-17.2-16.2-12.0-11.1-10.7-11.0-8.5
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax-6.2-6.60.0-9.2-13.0-101.70.0-64.5-14.2-8.70.0-19.6-19.6-18.40.0-21.4-20.1-17.50.00.00.00.00.00.00.00.00.00.0
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax us-gaap:IntersegmentElimination0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:CostsAndExpenses us-gaap:ConsolidationItems, us-gaap:StatementBusinessSegments

us-gaap:OperatingSegments, ar:AnteroMidstream


Costs
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value81908881857664315851383226140140118
Percentage of CostsAndExpenses7.28.27.67.27.872.642.327.811.53.12.413.113.713.4
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax6.26.60.09.213.0102.10.065.314.22.90.013.815.013.0
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax us-gaap:OperatingSegments ar:AnteroMidstream0.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:OperatingSegments, ar:ExplorationAndProduction


Costs
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-30
Value93394710291006978961879198810629711070979851735739683629643705566538525522463469461409346
Percentage of CostsAndExpenses82.485.488.488.789.691.286.294.588.590.798.091.483.383.488.694.994.492.689.587.284.081.888.392.386.987.090.190.9
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax71.369.20.0113.1150.1128.10.0221.8109.687.20.096.191.280.70.095.789.385.00.00.00.00.00.00.00.00.00.00.0
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax us-gaap:OperatingSegments ar:ExplorationAndProduction0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:OperatingSegments, ar:Marketing


Costs
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-30
Value19816213412811393140108137163125151213195119787789120114125137846179734532
Percentage of CostsAndExpenses17.614.611.611.310.48.813.85.111.515.211.514.220.922.214.411.011.613.015.317.719.721.514.312.314.613.810.08.4
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax15.211.80.014.517.312.40.012.114.214.60.014.922.821.50.011.111.011.90.00.00.00.00.00.00.00.00.00.0
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax us-gaap:OperatingSegments ar:Marketing0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:CostsAndExpenses us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName, us-gaap:EquityMethodInvestmentNonconsolidatedInvestee

ar:AnteroMidstream, us-gaap:EquityMethodInvestmentNonconsolidatedInvesteeOrGroupOfInvestees


Costs
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-06-30
Value81908185762745
Percentage of CostsAndExpenses7.28.27.27.872.362.2
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax6.26.69.213.0101.70.0
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax ar:AnteroMidstream us-gaap:EquityMethodInvestmentNonconsolidatedInvesteeOrGroupOfInvestees0.00.00.00.00.00.0

Gains Losses On Extinguishment Of Debt

us-gaap:GainsLossesOnExtinguishmentOfDebt

us-gaap:GainsLossesOnExtinguishmentOfDebt


Gains
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312014-12-312014-09-302014-06-30
Value-23.065-43.2040.5975539800.040-20.386
Percentage of GainsLossesOnExtinguishmentOfDebt100.0100.0100.0100.0100.0100.00.0100.0100.0
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax-1.8-3.20.06.36.010.70.00.00.0

us-gaap:GainsLossesOnExtinguishmentOfDebt us-gaap:LongtermDebtType, us-gaap:TypeOfArrangement

ar:ConvertibleSeniorNotes4.25PercentDue2026, ar:ConvertibleNoteRepurchaseWithShareOffering


Gains
Period End2021-06-302021-03-31
Value2.0-43.0
Percentage of GainsLossesOnExtinguishmentOfDebt-8.799.5
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax0.2-3.1
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax ar:ConvertibleSeniorNotes4.25PercentDue2026 ar:ConvertibleNoteRepurchaseWithShareOffering0.00.0

ar:ConvertibleSeniorNotes4.25PercentDue2026, ar:ConvertibleNoteRepurchaseWithShareOfferingInMay


Gains
Period End2021-06-30
Value21
Percentage of GainsLossesOnExtinguishmentOfDebt-91.0
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax1.6
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax ar:ConvertibleSeniorNotes4.25PercentDue2026 ar:ConvertibleNoteRepurchaseWithShareOfferingInMay0.0

General And Administrative Expense

us-gaap:GeneralAndAdministrativeExpense

us-gaap:GeneralAndAdministrativeExpense


General
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-30
Value3244333138313235426858596160606264646557605655595959545358503841413121311
Percentage of GeneralAndAdministrativeExpense100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax2.53.20.03.65.94.20.04.04.46.10.05.96.66.60.08.79.18.50.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:GeneralAndAdministrativeExpense us-gaap:ConsolidationItems

us-gaap:IntersegmentElimination


General
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-14.251-17.93-13.022-13.232-12.422-10.199-33.087-30.595-34.62216-0.644-0.632-0.469-0.845-1.331-0.402-0.221-0.815-0.409-0.375-0.371-0.356-0.365-0.322-0.21-0.287
Percentage of GeneralAndAdministrativeExpense-44.3-40.7-39.2-41.8-32.3-32.7-102.8-85.2-81.723.6-1.1-1.1-0.8-1.4-2.2-0.6-0.3-1.3-0.6-0.7-0.6-0.6-0.7-0.5-0.4-0.5
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax-1.1-1.30.0-1.5-1.9-1.40.0-3.4-3.61.40.0-0.1-0.1-0.10.0-0.1-0.0-0.10.00.00.00.00.00.00.00.0
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax us-gaap:IntersegmentElimination0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:GeneralAndAdministrativeExpense us-gaap:ConsolidationItems, us-gaap:StatementBusinessSegments

us-gaap:OperatingSegments, ar:AnteroMidstream


General
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
Value1417131312133330342.18416151514
Percentage of GeneralAndAdministrativeExpense44.340.739.241.832.343.4102.885.281.73.228.425.125.124.1
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax1.11.30.01.51.91.80.03.43.60.20.01.51.71.6
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax us-gaap:OperatingSegments ar:AnteroMidstream0.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:OperatingSegments, ar:ExplorationAndProduction


General
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
Value324433313831323542494245464646484951514447434246474745455045
Percentage of GeneralAndAdministrativeExpense100.0100.0100.0100.0100.0100.0100.0100.0100.073.272.776.075.677.376.977.677.378.978.577.578.577.476.877.379.880.383.485.686.588.9
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax2.53.20.03.65.94.20.04.04.44.50.04.55.05.10.06.87.06.70.00.00.00.00.00.00.00.00.00.00.00.0
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax us-gaap:OperatingSegments ar:ExplorationAndProduction0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

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

us-gaap:IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest

us-gaap:IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest


Income
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-30
Value-710.417-14.05118-722.624-605.472-448.795-589.638-1151.491591314-112.621-59.019-92.84889129-135.07858436-718.425409-951.98415252880-223.572646978338-62.949
Percentage of IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax-54.3-1.00.0-81.2-92.8-59.80.0-128.46.1117.90.0-5.8-9.99.90.0-18.98.357.70.00.00.00.00.00.00.00.00.00.00.0

Income Tax Expense Benefit

us-gaap:IncomeTaxExpenseBenefit

us-gaap:IncomeTaxExpenseBenefit


Income
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-30
Value-175.966-2.94623-168.778-142.404-109.985-107.442-272.62717288-131.35718-25.5739.12-400.138-45.07818131-265.621140-376.4944.81577335-84.089247369135-18.454-40.662656783-30.412-75.444
Percentage of IncomeTaxExpenseBenefit100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax-13.5-0.20.0-19.0-21.8-14.70.0-30.41.825.90.01.9-2.71.00.0-6.32.717.40.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

Interest Expense Debt

us-gaap:InterestExpenseDebt us-gaap:LongtermDebtType

us-gaap:InterestExpenseDebt

ar:ConvertibleSeniorNotes4.25PercentDue2026


Interest
Period End2021-06-302021-03-312020-09-30
Value2800000.04400000.02300000.0
Percentage of InterestExpenseDebt100.0100.0100.0
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax0.20.30.3
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax ar:ConvertibleSeniorNotes4.25PercentDue20260.00.00.0

Interest Income Expense Net

us-gaap:InterestIncomeExpenseNet

us-gaap:InterestIncomeExpenseNet


Interest
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-30
Value-49963000.0-42743000.0-46916000.0-48043000.0-51811000.0-53102000.0-54243000.0-47754000.0-54164000.0-71950000.0-78440000.0-74528000.0-69349000.0
Percentage of InterestIncomeExpenseNet100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax-3.8-3.10.0-5.4-7.9-7.10.0-5.3-5.6-6.50.0-7.3-7.4

Interest Paid Net

us-gaap:InterestPaidNet

us-gaap:InterestPaidNet


Interest
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-30
Value23355633713082238237964988428949893510611
Percentage of InterestPaidNet100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax1.82.60.03.811.04.00.02.68.53.30.04.89.44.60.06.912.74.70.00.0

Net Income Loss Attributable To Noncontrolling Interest

us-gaap:NetIncomeLossAttributableToNoncontrollingInterest

us-gaap:NetIncomeLossAttributableToNoncontrollingInterest


Net
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-31
Value-10.9844.39525-18.2330.2360.00.00.046140766965424545373229201517105.894.742.248
Percentage of NetIncomeLossAttributableToNoncontrollingInterest100.0100.0100.0100.0100.00.00.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax-0.80.30.0-2.00.00.00.00.04.20.07.57.47.20.06.36.44.90.00.00.00.00.00.00.00.00.0

Net Income Loss Available To Common Stockholders Basic

us-gaap:NetIncomeLossAvailableToCommonStockholdersBasic

us-gaap:NetIncomeLossAvailableToCommonStockholdersBasic


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
Value-523.467-15.49969-535.613-463.304-338.81-482.196-878.86442978-121.546-154.419-136.38514486-135.063-5.132268-485.772238-596.244-5.055158533-145.373394606203-42.285-94.759
Percentage of NetIncomeLossAvailableToCommonStockholdersBasic100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax-40.0-1.10.0-60.2-71.0-45.10.0-98.04.387.80.0-15.1-14.61.60.0-18.9-0.735.50.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:NetIncomeLossAvailableToCommonStockholdersBasic us-gaap:ConsolidatedEntities

ar:ParentCompanyAndGuarantorSubsidiaries


Net
Period End2021-06-302021-03-31
Value-523.467-15.499
Percentage of NetIncomeLossAvailableToCommonStockholdersBasic100.0100.0
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax-40.0-1.1
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax ar:ParentCompanyAndGuarantorSubsidiaries0.0-1.3

srt:ParentCompany


Net
Period End2020-12-31
Value-441.139
Percentage of NetIncomeLossAvailableToCommonStockholdersBasic-631.7
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax0.0
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax srt:ParentCompany0.0

Nonoperating Income Expense

us-gaap:NonoperatingIncomeExpense

us-gaap:NonoperatingIncomeExpense


Nonoperating
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-30
Value-67.467-108.59-26.153311.45-711.228-522.182-165.613-40.5791348-65.992-63.823-60.085-56.564-57.583-63.026-64.959-64.439-86.416-58.212-62.111-63.284-60.471-60.921-59.823-53.185-48.994-42.455-57.646
Percentage of NonoperatingIncomeExpense100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax-5.2-7.90.03.50.2-94.80.0-18.5-4.2120.90.0-6.3-6.4-6.20.0-8.8-9.2-8.50.00.00.00.00.00.00.00.00.00.00.0

Operating Income Loss

us-gaap:OperatingIncomeLoss

us-gaap:OperatingIncomeLoss


Operating
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-31
Value-642.9594145-754.109-606.922262-67.456-985.87899-33.707-46.634.804-32.763146187-72.052123501-632.009467-889.87378313941-163.7496991027381-5.303-104.079-81.318222248-48.469124-166.878-23.456510
Percentage of OperatingIncomeLoss100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax-49.16.90.0-84.8-93.135.00.0-110.010.3-3.00.00.5-3.516.10.0-10.117.666.20.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:OperatingIncomeLoss us-gaap:ConsolidatedEntities

ar:ParentCompanyAndGuarantorSubsidiaries


Operating
Period End2021-06-302021-03-31
Value-631.96690
Percentage of OperatingIncomeLoss98.395.4
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax-48.36.6
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax ar:ParentCompanyAndGuarantorSubsidiaries0.07.6

srt:ParentCompany


Operating
Period End2020-12-31
Value-330.557
Percentage of OperatingIncomeLoss-227.7
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax0.0
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax srt:ParentCompany0.0

us-gaap:OperatingIncomeLoss us-gaap:ConsolidationItems

us-gaap:IntersegmentElimination


Operating
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-31
Value-151.399-133.587-114.983-151.817-134.726519192334-117.59145-41.46-66.643-67.532-62.625-43.935-40.862-52.655-44.398-45.717-43.522-30.376-25.429-32.795-17.579-23.181-24.13-49.129-31.761-27.068-15.695-10.74-9.074-7.415-3.697
Percentage of OperatingIncomeLoss23.5-141.3-79.220.122.2197.8-285.7-33.9-117.6-134.488.9-1387.2206.1-42.7-23.556.7-42.6-8.97.2-9.33.4-32.3-10.5-1.914.2-3.4-4.8-8.3510.415.113.2-4.1-3.07.6
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax-11.6-9.70.0-17.1-20.769.20.037.3-12.14.10.0-6.5-7.2-6.90.0-5.7-7.5-5.90.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax us-gaap:IntersegmentElimination0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

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

us-gaap:OperatingSegments, ar:AnteroMidstream


Operating
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value151133114151134-522.46-192.693-341.88911721255125110111
Percentage of OperatingIncomeLoss-23.5141.379.2-20.1-22.2-199.1285.734.7117.6-63.0-547.02618.3-337.976.0
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax11.69.70.017.120.7-69.60.0-38.112.11.90.012.311.912.2
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax us-gaap:OperatingSegments ar:AnteroMidstream0.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:OperatingSegments, ar:ExplorationAndProduction


Operating
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-30
Value-609.40991170-717.026-558.154309-17.775-916.507174-28.374-199.8097.874-22.62254213-86.02111488-654.996454-877.5296346940-147.059704103539011-92.998-54.613222
Percentage of OperatingIncomeLoss94.897.1117.895.192.0118.026.493.0174.584.2428.5163.969.037.5114.4119.490.197.4103.697.298.6122.8110.599.989.8100.7100.8102.5-220.389.467.2100.0
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax-46.66.70.0-80.6-85.641.30.0-102.218.0-2.50.00.8-2.46.00.0-12.115.864.50.00.00.00.00.00.00.00.00.00.00.00.00.00.0
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax us-gaap:OperatingSegments ar:ExplorationAndProduction0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:OperatingSegments, ar:Marketing


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
Value-33.5412.713-25.781-37.083-48.768-47.2-49.679-61.571-74.459-71.898-60.419-62.208-53.32842-49.991-28.117-27.453-24.069-14.967-17.535-35.075-38.717-51.874-26.166-29.224-15.569-14.76-14.357-11.959-8.755
Percentage of OperatingIncomeLoss5.22.9-17.84.98.0-18.073.66.2-74.5213.3129.6-1294.9162.829.3-26.739.0-22.2-4.82.4-3.83.9-49.2-16.6-2.817.8-2.2-1.4-3.8225.58.4
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax-2.60.20.0-4.2-7.5-6.30.0-6.9-7.7-6.50.0-6.1-5.74.70.0-3.9-3.9-3.20.00.00.00.00.00.00.00.00.00.00.00.0
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax us-gaap:OperatingSegments ar:Marketing0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:OperatingIncomeLoss us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName, us-gaap:EquityMethodInvestmentNonconsolidatedInvestee

ar:AnteroMidstream, us-gaap:EquityMethodInvestmentNonconsolidatedInvesteeOrGroupOfInvestees


Operating
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-06-30
Value151133151134-519.164-192.419
Percentage of OperatingIncomeLoss-23.5141.3-20.1-22.2-197.8-192.4
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax11.69.717.120.7-69.20.0
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax ar:AnteroMidstream us-gaap:EquityMethodInvestmentNonconsolidatedInvesteeOrGroupOfInvestees0.00.00.00.00.00.0

Profit Loss

us-gaap:ProfitLoss

us-gaap:ProfitLoss


Profit
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-31
Value-534.451-11.10495-553.846-463.068-338.81-482.196-878.86442102518-77.972-67.27580529-90.039305-452.804268-575.4910175544-139.483399608203-42.285-94.759-223.02120131-47.997-7.035
Percentage of ProfitLoss100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax-40.9-0.80.0-62.3-71.0-45.10.0-98.04.392.00.0-7.6-7.28.90.0-12.65.740.40.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:ProfitLoss us-gaap:ConsolidatedEntities

ar:ParentCompanyAndGuarantorSubsidiaries


Profit
Period End2021-06-302021-03-31
Value-523.467-15.499
Percentage of ProfitLoss97.9139.6
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax-40.0-1.1
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax ar:ParentCompanyAndGuarantorSubsidiaries0.0-1.3

srt:ParentCompany


Profit
Period End2020-12-31
Value-423.142
Percentage of ProfitLoss-443.9
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax0.0
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax srt:ParentCompany0.0

us-gaap:ProfitLoss us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName, us-gaap:EquityMethodInvestmentNonconsolidatedInvestee

ar:AnteroMidstream, us-gaap:EquityMethodInvestmentNonconsolidatedInvesteeOrGroupOfInvestees


Profit
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-06-30
Value808310588-392.933-197.006
Percentage of ProfitLoss-15.0-751.4-19.0-19.1116.0-467.2
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax6.16.111.913.6-52.40.0
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax ar:AnteroMidstream us-gaap:EquityMethodInvestmentNonconsolidatedInvesteeOrGroupOfInvestees0.00.00.00.00.00.0

us-gaap:ProfitLoss us-gaap:StatementEquityComponents

us-gaap:NoncontrollingInterest


Profit
Period End2021-06-302021-03-312020-09-302020-06-302019-03-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-30
Value-10.9844.395-18.2330.2364676696542454537322920151710
Percentage of ProfitLoss2.1-39.63.3-0.14.6-98.0-102.781.68.1-50.1112.812.2-7.311.2-3.6147.59.72.0
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax-0.80.3-2.00.04.27.57.47.20.06.36.44.90.00.00.00.00.00.0
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax us-gaap:NoncontrollingInterest0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:RetainedEarnings


Profit
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-30
Value-523.467-15.499-535.613-463.304-338.81-878.86442978-154.419-136.38514486-135.063-5.132268-485.772238-596.244-5.055158533
Percentage of ProfitLoss97.9139.696.7100.1100.0100.0100.095.4198.0202.718.491.9150.1-12.887.8107.388.8103.6-47.590.398.0
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax-40.0-1.1-60.2-71.0-45.1-98.04.387.8-15.1-14.61.60.0-18.9-0.735.50.00.00.00.00.00.0
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax us-gaap:RetainedEarnings0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

Revenue From Contract With Customer Including Assessed Tax

us-gaap:RevenueFromContractWithCustomerIncludingAssessedTax

us-gaap:RevenueFromContractWithCustomerIncludingAssessedTax


Revenue
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value130813701102889652750959896969111412681019934911843713704756
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:RevenueFromContractWithCustomerIncludingAssessedTax us-gaap:ConsolidatedEntities

ar:ParentCompanyAndGuarantorSubsidiaries


Revenue
Period End2021-06-302021-03-31
Value4901189
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax37.586.8
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax37.586.8
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax ar:ParentCompanyAndGuarantorSubsidiaries100.0100.0

srt:ParentCompany


Revenue
Period End2020-12-31
Value1299
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax117.9
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax117.9
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax srt:ParentCompany100.0

us-gaap:RevenueFromContractWithCustomerIncludingAssessedTax us-gaap:ProductOrService

ar:Marketings


Revenue
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value16516410891644691466391648916014491504965
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax12.612.09.910.39.96.19.55.26.58.25.18.817.215.810.87.17.18.7
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax12.612.09.910.39.96.19.55.26.58.25.18.817.215.810.87.17.18.7
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax ar:Marketings100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

ar:NaturalGasLiquidsSales


Revenue
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value464440364327212257316284303313349338255234280224170194
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax35.532.133.136.832.534.333.031.831.428.127.633.227.425.733.331.524.225.7
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax35.532.133.136.832.534.333.031.831.428.127.633.227.425.733.331.524.225.7
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax ar:NaturalGasLiquidsSales100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:NaturalGasProduction


Revenue
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-30
Value626720595436367411512524553657789527473497439409
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax47.952.654.049.156.354.853.458.557.159.062.351.750.754.652.157.3
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax47.952.654.049.156.354.853.458.557.159.062.351.750.754.652.157.3
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax us-gaap:NaturalGasProduction100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OilAndCondensate


Revenue
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-30
Value514434348.3223539404948585938302826
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax4.03.33.13.91.34.74.24.55.14.34.65.94.23.33.33.7
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax4.03.33.13.91.34.74.24.55.14.34.65.94.23.33.33.7
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax us-gaap:OilAndCondensate100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ProductAndServiceOther


Revenue
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-31
Value-0.6190.640.6170.6750.7070.7980.8121.4811.760.107
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax-0.00.00.10.10.10.10.10.20.20.0
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax-0.00.00.10.10.10.10.10.20.20.0
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax us-gaap:ProductAndServiceOther100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:RevenueFromContractWithCustomerIncludingAssessedTax us-gaap:ProductOrService, us-gaap:StatementBusinessSegments

ar:Marketings, ar:Marketing


Revenue
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value16516410891644691466391648916014491504965
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax12.612.09.910.39.96.19.55.26.58.25.18.817.215.810.87.17.18.7
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax12.612.09.910.39.96.19.55.26.58.25.18.817.215.810.87.17.18.7
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax ar:Marketings ar:Marketing100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

ar:NaturalGasLiquidsSalesC3Ngls, ar:ExplorationAndProduction


Revenue
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value420404336294185230284258273278292282223207251200149176
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax32.229.530.533.228.430.829.628.828.225.023.127.723.922.729.828.121.223.3
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax32.229.530.533.228.430.829.628.828.225.023.127.723.922.729.828.121.223.3
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax ar:NaturalGasLiquidsSalesC3Ngls ar:ExplorationAndProduction100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

ar:NaturalGasLiquidsSalesEthane, ar:ExplorationAndProduction


Revenue
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value433627322626322630355656322728242118
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax3.32.62.53.64.13.63.43.03.13.24.55.53.53.03.43.43.02.4
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax3.32.62.53.64.13.63.43.03.13.24.55.53.53.03.43.43.02.4
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax ar:NaturalGasLiquidsSalesEthane ar:ExplorationAndProduction100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:NaturalGasProduction, ar:ExplorationAndProduction


Revenue
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-30
Value626720595436367411512524553657789527473497439409
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax47.952.654.049.156.354.853.458.557.159.062.351.750.754.652.157.3
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax47.952.654.049.156.354.853.458.557.159.062.351.750.754.652.157.3
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax us-gaap:NaturalGasProduction ar:ExplorationAndProduction100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OilAndCondensate, ar:ExplorationAndProduction


Revenue
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-30
Value514434348.3223539404948585938302826
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax4.03.33.13.91.34.74.24.55.14.34.65.94.23.33.33.7
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax4.03.33.13.91.34.74.24.55.14.34.65.94.23.33.33.7
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax us-gaap:OilAndCondensate ar:ExplorationAndProduction100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Revenues

us-gaap:Revenues

us-gaap:Revenues


Revenues
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-31
Value489120413093804841317952111812991037104510769891028102164779011951561116-249.19872190514433761229148176231116448038438761235-92.03838553
Percentage of Revenues100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax37.487.9118.842.874.3175.599.3124.8134.193.182.5105.6105.9112.8121.290.8112.2158.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:Revenues us-gaap:ConsolidationItems

us-gaap:IntersegmentElimination


Revenuesus-gaap:
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-31
Value-232.787-224.121-203.86-233.415-219.736-243.708-239.069-243.795-255.618-51.28-171.982-266.557-250.636-230.531-212.214-193.83-194.486-176.605-166.751-151.496-137.414-135.811-128.547-77.675-83.042-80.855-92.199-66.708-53.876-32.752-22.942-16.994-11.98-6.318
Percentage of Revenues-47.6-18.6-15.6-61.3-45.3-18.5-25.1-21.8-19.7-4.9-16.4-24.8-25.3-22.4-20.8-29.9-24.6-14.8-106.7-13.655.1-18.8-14.2-5.4-22.0-6.6-6.2-8.7-17.3-19.9-4.8-4.4-3.1-10.3
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax-17.8-16.4-18.5-26.2-33.7-32.5-24.9-27.2-26.4-4.6-13.6-26.1-26.8-25.3-25.2-27.2-27.6-23.30.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax us-gaap:IntersegmentElimination0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

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

us-gaap:OperatingSegments, ar:AnteroMidstream


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
Value23222420323321924323924325554281266250229
Percentage of Revenues47.618.615.661.345.318.525.121.819.75.226.924.725.422.3
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax17.816.418.526.233.732.524.927.226.44.922.226.126.925.2
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax us-gaap:OperatingSegments ar:AnteroMidstream0.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:OperatingSegments, ar:ExplorationAndProduction


Revenuesus-gaap:
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-30
Value323103912002894201271861107212369438719878287909365977411131431016-343.394617865140332211651437739305161480384
Percentage of Revenues66.286.391.776.086.796.590.495.895.190.983.391.783.876.991.692.293.894.627.991.0137.885.795.697.285.694.897.097.098.297.9100.0100.0
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax24.875.9108.932.564.5169.489.8119.6127.684.668.796.888.786.7111.083.7105.2149.50.00.00.00.00.00.00.00.00.00.00.00.00.00.0
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax us-gaap:OperatingSegments ar:ExplorationAndProduction0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:OperatingSegments, ar:Marketing


Revenuesus-gaap:
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-31
Value165164108916446914663916489160238695049651059790993235495730171.9873.226
Percentage of Revenues33.813.78.324.013.33.59.64.24.98.86.28.316.223.26.97.86.35.567.88.7-36.513.83.62.513.24.72.12.30.62.0
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax12.612.09.910.39.96.19.55.26.58.25.18.817.126.28.37.17.18.70.00.00.00.00.00.00.00.00.00.00.00.0
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax us-gaap:OperatingSegments ar:Marketing0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:Revenues us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName, us-gaap:EquityMethodInvestmentNonconsolidatedInvestee

ar:AnteroMidstream, us-gaap:EquityMethodInvestmentNonconsolidatedInvesteeOrGroupOfInvestees


Revenuesus-gaap:
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-06-30
Value232224233219243553
Percentage of Revenues47.618.661.345.318.542.6
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax17.816.426.233.732.50.0
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax ar:AnteroMidstream us-gaap:EquityMethodInvestmentNonconsolidatedInvesteeOrGroupOfInvestees0.00.00.00.00.00.0

Assets

us-gaap:Assets

us-gaap:Assets


Assets
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-31
Value12848130001315013349137431452515197161201733017288155191580215690154221526114849154421488814255146291355814288141551357712532124811157393158045713466135672482540923618
Percentage of Assets100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:Assets us-gaap:ConsolidatedEntities

ar:ParentCompanyAndGuarantorSubsidiaries


Assetsus-gaap:
Period End2021-06-302021-03-312020-12-31
Value120511219212327
Percentage of Assets93.893.893.7
Percentage of Assets93.893.893.7
Percentage of Assets ar:ParentCompanyAndGuarantorSubsidiaries100.0100.0100.0

srt:GuarantorSubsidiaries


Assetsus-gaap:
Period End2020-09-302019-12-31
Value6351111
Percentage of Assets4.87.3
Percentage of Assets4.87.3
Percentage of Assets srt:GuarantorSubsidiaries100.0100.0

srt:ParentCompany


Assetsus-gaap:
Period End2020-12-312020-09-302019-12-31
Value123271231015197
Percentage of Assets93.792.2100.0
Percentage of Assets93.792.2100.0
Percentage of Assets srt:ParentCompany100.0100.0100.0

us-gaap:Assets us-gaap:ConsolidationItems

us-gaap:IntersegmentElimination


Assetsus-gaap:
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-31
Value-5540.742-5546.76-5610.912-5673.504-5715.055-5781.359-5227.701-6445.504-6769.009-6660.325-1044.842-1113.899-1045.222-969.831-906.697-829.288-779.905-715.7-661.354-603.016-552.447-529.048-322.843-267.951-231.237-213.98-191.647-857.357-843.358-840.386-758.803-514.172-367.528-206.976
Percentage of Assets-43.1-42.7-42.7-42.5-41.6-39.8-34.4-40.0-39.1-38.5-6.7-7.0-6.7-6.3-5.9-5.6-5.1-4.8-4.6-4.1-4.1-3.7-2.3-2.0-1.8-1.7-1.7-9.2-10.5-11.8-11.5-9.1-7.6-5.1
Percentage of Assets-43.1-42.7-42.7-42.5-41.6-39.8-34.4-40.0-39.1-38.5-6.7-7.0-6.7-6.3-5.9-5.6-5.1-4.8-4.6-4.1-4.1-3.7-2.3-2.0-1.8-1.7-1.7-9.2-10.5-11.8-11.5-9.1-7.6-5.1
Percentage of Assets us-gaap:IntersegmentElimination100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

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

us-gaap:OperatingSegments, ar:AnteroMidstream


Assetsus-gaap:
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value554055465610567357155781628264456769666035423411329331513057
Percentage of Assets43.142.742.742.541.639.841.340.039.138.522.821.621.020.420.0
Percentage of Assets43.142.742.742.541.639.841.340.039.138.522.821.621.020.420.0
Percentage of Assets us-gaap:OperatingSegments ar:AnteroMidstream100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OperatingSegments, ar:ExplorationAndProduction


Assetsus-gaap:
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-30
Value1278813000131501334913711145161412116094173051726312986134841338113200130741275113430129891251212966119191273812466119401092010835992086966861617558595587
Percentage of Assets99.5100.0100.0100.099.899.992.999.899.999.983.785.385.385.685.785.987.087.287.888.687.989.288.187.987.186.885.793.385.386.688.698.5
Percentage of Assets99.5100.0100.0100.099.899.992.999.899.999.983.785.385.385.685.785.987.087.287.888.687.989.288.187.987.186.885.793.385.386.688.698.5
Percentage of Assets us-gaap:OperatingSegments ar:ExplorationAndProduction100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OperatingSegments, ar:Marketing


Assetsus-gaap:
Period End2021-06-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-30
Value60329.63920252525342061413615142737332335165.8471728109.084
Percentage of Assets0.50.20.10.10.20.10.10.20.10.40.30.20.10.10.20.30.20.20.30.10.00.10.20.10.1
Percentage of Assets0.50.20.10.10.20.10.10.20.10.40.30.20.10.10.20.30.20.20.30.10.00.10.20.10.1
Percentage of Assets us-gaap:OperatingSegments ar:Marketing100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:Assets us-gaap:Ownership

ar:AnteroMidstream


Assetsus-gaap:
Period End2020-12-312019-12-31
Value56106282
Percentage of Assets42.741.3
Percentage of Assets42.741.3
Percentage of Assets ar:AnteroMidstream100.0100.0

us-gaap:Assets us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName, us-gaap:EquityMethodInvestmentNonconsolidatedInvestee

ar:AnteroMidstream, us-gaap:EquityMethodInvestmentNonconsolidatedInvesteeOrGroupOfInvestees


Assetsus-gaap:
Period End2021-06-302021-03-312020-12-312020-09-302019-12-31
Value55405546561056736282
Percentage of Assets43.142.742.742.541.3
Percentage of Assets43.142.742.742.541.3
Percentage of Assets ar:AnteroMidstream us-gaap:EquityMethodInvestmentNonconsolidatedInvesteeOrGroupOfInvestees100.0100.0100.0100.0100.0

Liabilities

us-gaap:Liabilities

us-gaap:Liabilities


Liabilities
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302012-12-31
Value712967727060736573117933822686738991899570317131688765016385646171396634652666485957686868686466622360476099556445213601301437941945
Percentage of Liabilities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets55.552.153.755.253.254.654.153.851.952.045.345.143.942.241.843.546.244.645.845.443.948.148.547.649.748.552.759.756.250.545.666.953.7

us-gaap:Liabilities us-gaap:ConsolidatedEntities

ar:ParentCompanyAndGuarantorSubsidiaries


Liabilitiesus-gaap:
Period End2021-06-302021-03-312020-12-31
Value707767477046
Percentage of Liabilities99.399.699.8
Percentage of Assets55.151.953.6
Percentage of Assets ar:ParentCompanyAndGuarantorSubsidiaries58.755.357.2

srt:GuarantorSubsidiaries


Liabilitiesus-gaap:
Period End2020-09-30
Value35
Percentage of Liabilities0.5
Percentage of Assets0.3
Percentage of Assets srt:GuarantorSubsidiaries5.5

srt:ParentCompany


Liabilitiesus-gaap:
Period End2020-12-312020-09-302019-12-31
Value704677828526
Percentage of Liabilities99.8105.7103.6
Percentage of Assets53.658.356.1
Percentage of Assets srt:ParentCompany57.263.256.1

Liabilities And Stockholders Equity

us-gaap:LiabilitiesAndStockholdersEquity

us-gaap:LiabilitiesAndStockholdersEquity


Liabilities
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302012-12-31
Value128481300013150133491374314525151971612017330172881551915802156901542215261148491544214888142551462913558142881415513577125321248111573931580457134661356723618
Percentage of LiabilitiesAndStockholdersEquity100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:LiabilitiesAndStockholdersEquity us-gaap:Ownership

ar:AnteroMidstream


Liabilities
Period End2020-12-312019-12-31
Value56106282
Percentage of LiabilitiesAndStockholdersEquity42.741.3
Percentage of Assets42.741.3
Percentage of Assets ar:AnteroMidstream100.0100.0

us-gaap:LiabilitiesAndStockholdersEquity us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName, us-gaap:EquityMethodInvestmentNonconsolidatedInvestee

ar:AnteroMidstream, us-gaap:EquityMethodInvestmentNonconsolidatedInvesteeOrGroupOfInvestees


Liabilities
Period End2021-06-302021-03-312020-12-312020-09-302019-12-31
Value55405546561056736282
Percentage of LiabilitiesAndStockholdersEquity43.142.742.742.541.3
Percentage of Assets43.142.742.742.541.3
Percentage of Assets ar:AnteroMidstream us-gaap:EquityMethodInvestmentNonconsolidatedInvesteeOrGroupOfInvestees100.0100.0100.0100.0100.0

Stockholders Equity

us-gaap:StockholdersEquity

us-gaap:StockholdersEquity


Stockholders
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302012-12-312011-12-312010-12-31
Value53975874576756686136659269707446833982927665791380548181814976557661763862626580623360585934577552186434547337513523353335981877167319581594
Percentage of StockholdersEquity100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets42.045.243.942.544.645.445.946.248.148.049.450.151.353.053.451.649.651.343.945.046.042.441.942.541.651.547.340.343.849.554.433.146.30.00.0

Assets Current

us-gaap:AssetsCurrent

us-gaap:AssetsCurrent


Assets
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302012-12-31
Value5505865745218421120922729713544806906834800833610735503402695669123812481040101711881252502387321333359274
Percentage of AssetsCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets4.34.54.43.96.17.76.14.54.13.25.25.75.35.25.54.14.83.42.84.84.98.78.87.78.19.510.85.44.84.55.06.37.6

us-gaap:AssetsCurrent us-gaap:ConsolidatedEntities

ar:ParentCompanyAndGuarantorSubsidiaries


Assets
Period End2021-06-302021-03-312020-12-31
Value515556543
Percentage of AssetsCurrent93.694.994.7
Percentage of Assets4.04.34.1
Percentage of Assets ar:ParentCompanyAndGuarantorSubsidiaries4.34.64.4

srt:GuarantorSubsidiaries


Assets
Period End2020-09-302019-12-31
Value433299
Percentage of AssetsCurrent83.032.4
Percentage of Assets3.22.0
Percentage of Assets srt:GuarantorSubsidiaries68.126.9

srt:ParentCompany


Assets
Period End2020-12-312020-09-302019-12-31
Value543497922
Percentage of AssetsCurrent94.795.4100.0
Percentage of Assets4.13.76.1
Percentage of Assets srt:ParentCompany4.44.06.1

us-gaap:AssetsCurrent us-gaap:Ownership

ar:AnteroMidstream


Assets
Period End2020-12-312019-12-31
Value93108
Percentage of AssetsCurrent16.411.8
Percentage of Assets0.70.7
Percentage of Assets ar:AnteroMidstream1.71.7

us-gaap:AssetsCurrent us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName, us-gaap:EquityMethodInvestmentNonconsolidatedInvestee

ar:AnteroMidstream, us-gaap:EquityMethodInvestmentNonconsolidatedInvesteeOrGroupOfInvestees


Assets
Period End2021-06-302021-03-312020-12-312020-09-302019-12-31
Value929193108108
Percentage of AssetsCurrent16.815.516.420.711.8
Percentage of Assets0.70.70.70.80.7
Percentage of Assets ar:AnteroMidstream us-gaap:EquityMethodInvestmentNonconsolidatedInvesteeOrGroupOfInvestees1.71.61.71.91.7

Cash And Cash Equivalents At Carrying Value

us-gaap:CashAndCashEquivalentsAtCarryingValue

us-gaap:CashAndCashEquivalentsAtCarryingValue


Cash
Period End2021-06-302018-06-302018-03-312017-12-312017-09-302017-06-302016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302011-12-312010-12-31
Value4.54150232823403118283923271431852456.30819121711104.80618163.3438.988
Percentage of CashAndCashEquivalentsAtCarryingValue100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets0.00.30.20.20.20.30.20.10.20.30.20.21.11.52.10.10.20.20.30.20.20.10.50.00.00.0

Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents

us-gaap:CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents

us-gaap:CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents


Cash
Period End2021-06-302020-06-302020-03-312019-12-312019-06-302019-03-312018-12-312018-06-302018-03-312017-12-312017-09-302016-12-312015-12-31
Value4.5410.00.00.00.00.00.0502328233123
Percentage of CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents100.00.00.00.00.00.00.0100.0100.0100.0100.0100.0100.0
Percentage of Assets0.00.00.00.00.00.00.00.30.20.20.20.20.2

Accounts Receivable Net Current

us-gaap:AccountsReceivableNetCurrent

us-gaap:AccountsReceivableNetCurrent


Accounts
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302012-12-31
Value36862888579146294948514635263443163629597178796079118116664627303321
Percentage of AccountsReceivableNetCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets0.30.70.20.70.40.60.30.20.30.30.30.30.20.20.20.30.10.20.20.40.50.60.60.40.60.91.00.70.60.40.50.60.6

us-gaap:AccountsReceivableNetCurrent us-gaap:ConsolidatedEntities

ar:ConsolidationEliminationsNonGuarantorSubsidiaries


Accounts
Period End2020-09-30
Value51
Percentage of AccountsReceivableNetCurrent57.9
Percentage of Assets0.4
Percentage of Assets ar:ConsolidationEliminationsNonGuarantorSubsidiaries0.0

ar:ParentCompanyAndGuarantorSubsidiaries


Accounts
Period End2021-03-31
Value51
Percentage of AccountsReceivableNetCurrent58.9
Percentage of Assets0.4
Percentage of Assets ar:ParentCompanyAndGuarantorSubsidiaries0.4

Other Assets Current

us-gaap:OtherAssetsCurrent

us-gaap:OtherAssetsCurrent


Other
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302012-12-31
Value141115118.94210107.3427.48.34135126.59108.943108.5739.6796.3133.4026.5288.0728.0871.7394.8194.2595.8664.6675.6954.4052.9752022
Percentage of OtherAssetsCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets0.10.10.10.10.10.10.10.00.00.00.20.10.00.10.10.10.10.10.00.00.00.10.10.00.00.00.10.10.10.10.00.40.6

us-gaap:OtherAssetsCurrent us-gaap:ConsolidatedEntities

ar:ParentCompanyAndGuarantorSubsidiaries


Other
Period End2021-06-302021-03-312020-12-31
Value515505543
Percentage of OtherAssetsCurrent3443.14291.13569.0
Percentage of Assets4.03.94.1
Percentage of Assets ar:ParentCompanyAndGuarantorSubsidiaries4.34.14.4

srt:GuarantorSubsidiaries


Other
Period End2020-09-30
Value35
Percentage of OtherAssetsCurrent293.5
Percentage of Assets0.3
Percentage of Assets srt:GuarantorSubsidiaries5.5

srt:ParentCompany


Other
Period End2020-12-312020-09-302019-12-31
Value543446797
Percentage of OtherAssetsCurrent3569.03744.77435.3
Percentage of Assets4.13.35.3
Percentage of Assets srt:ParentCompany4.43.65.3

Assets Noncurrent

us-gaap:AssetsNoncurrent us-gaap:ConsolidatedEntities

us-gaap:AssetsNoncurrent

ar:ParentCompanyAndGuarantorSubsidiaries


Assets
Period End2021-06-302021-03-312020-12-31
Value115361163611783
Percentage of AssetsNoncurrent100.0100.0100.0
Percentage of Assets89.889.589.6
Percentage of Assets ar:ParentCompanyAndGuarantorSubsidiaries95.795.495.6

srt:GuarantorSubsidiaries


Assets
Period End2020-09-302019-12-31
Value202812
Percentage of AssetsNoncurrent0.00.0
Percentage of Assets1.55.3
Percentage of Assets srt:GuarantorSubsidiaries31.973.1

srt:ParentCompany


Assets
Period End2020-12-312020-09-302019-12-31
Value117831181314274
Percentage of AssetsNoncurrent100.00.00.0
Percentage of Assets89.688.593.9
Percentage of Assets srt:ParentCompany95.696.093.9

us-gaap:AssetsNoncurrent us-gaap:Ownership

ar:AnteroMidstream


Assets
Period End2020-12-312019-12-31
Value55166174
Percentage of AssetsNoncurrent46.80.0
Percentage of Assets42.040.6
Percentage of Assets ar:AnteroMidstream98.398.3

us-gaap:AssetsNoncurrent us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName, us-gaap:EquityMethodInvestmentNonconsolidatedInvestee

ar:AnteroMidstream, us-gaap:EquityMethodInvestmentNonconsolidatedInvesteeOrGroupOfInvestees


Assets
Period End2021-06-302021-03-312020-12-312020-09-302019-12-31
Value54485455551655656174
Percentage of AssetsNoncurrent47.246.946.80.00.0
Percentage of Assets42.442.042.041.740.6
Percentage of Assets ar:AnteroMidstream us-gaap:EquityMethodInvestmentNonconsolidatedInvesteeOrGroupOfInvestees98.398.498.398.198.3

Investments In Affiliates Subsidiaries Associates And Joint Ventures

us-gaap:InvestmentsInAffiliatesSubsidiariesAssociatesAndJointVentures dei:LegalEntity

us-gaap:InvestmentsInAffiliatesSubsidiariesAssociatesAndJointVentures

ar:AnteroMidstreamPartnersLp


Investments
Period End2020-12-312019-12-312018-12-312018-09-302018-06-302018-03-312017-12-312016-12-31
Value255105543339235832130368
Percentage of InvestmentsInAffiliatesSubsidiariesAssociatesAndJointVentures100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets1.96.92.82.52.32.12.00.5
Percentage of Assets ar:AnteroMidstreamPartnersLp0.00.00.00.00.00.00.00.0

us-gaap:InvestmentsInAffiliatesSubsidiariesAssociatesAndJointVentures us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName

ar:AnteroMidstream


Investments
Period End2020-12-312020-06-302020-03-312019-12-312019-09-302019-06-302019-03-31
Value2552792911055181919671989
Percentage of InvestmentsInAffiliatesSubsidiariesAssociatesAndJointVentures100.00.00.0100.00.00.00.0
Percentage of Assets1.92.02.06.911.311.411.5
Percentage of Assets ar:AnteroMidstream0.00.00.00.00.00.00.0

us-gaap:InvestmentsInAffiliatesSubsidiariesAssociatesAndJointVentures us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName, us-gaap:EquityMethodInvestmentNonconsolidatedInvestee

ar:AnteroMidstream, us-gaap:EquityMethodInvestmentNonconsolidatedInvesteeOrGroupOfInvestees


Investments
Period End2021-06-302021-03-312020-12-312020-09-302019-12-31
Value2372412552721055
Percentage of InvestmentsInAffiliatesSubsidiariesAssociatesAndJointVentures0.00.0100.00.0100.0
Percentage of Assets1.81.91.92.06.9
Percentage of Assets ar:AnteroMidstream us-gaap:EquityMethodInvestmentNonconsolidatedInvesteeOrGroupOfInvestees4.34.34.54.816.8

Operating Lease Right Of Use Asset

us-gaap:OperatingLeaseRightOfUseAsset

us-gaap:OperatingLeaseRightOfUseAsset


Operating
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-31
Value2486254926132660256228142886323033303433
Percentage of OperatingLeaseRightOfUseAsset100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets19.319.619.919.918.619.419.020.019.219.9

us-gaap:OperatingLeaseRightOfUseAsset us-gaap:PropertyPlantAndEquipmentByType

us-gaap:OtherMachineryAndEquipment


Operating
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-31
Value0.5730.6750.7460.780.8981.0130.1660.2990.430.559
Percentage of OperatingLeaseRightOfUseAsset0.00.00.00.00.00.00.00.00.00.0
Percentage of Assets0.00.00.00.00.00.00.00.00.00.0
Percentage of Assets us-gaap:OtherMachineryAndEquipment0.00.00.00.00.00.00.00.00.00.0

us-gaap:Vehicles


Operating
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-31
Value1.3272.0242.7043.3673.4594.2324.9834.9715.6276.273
Percentage of OperatingLeaseRightOfUseAsset0.10.10.10.10.10.20.20.20.20.2
Percentage of Assets0.00.00.00.00.00.00.00.00.00.0
Percentage of Assets us-gaap:Vehicles0.00.00.00.00.00.00.00.00.00.0

us-gaap:OperatingLeaseRightOfUseAsset us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName, us-gaap:UnderlyingAssetClass

ar:AnteroMidstream, ar:GasGatheringLinesAndCompressorStations


Operating
Period End2021-06-302021-03-312020-12-312019-12-31
Value1000110011001100
Percentage of OperatingLeaseRightOfUseAsset40.243.142.138.1
Percentage of Assets7.88.58.47.2
Percentage of Assets ar:AnteroMidstream ar:GasGatheringLinesAndCompressorStations0.00.00.00.0

us-gaap:OperatingLeaseRightOfUseAsset us-gaap:UnderlyingAssetClass

ar:DrillingAndCompletionRigs


Operating
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-30
Value2022291931567193115
Percentage of OperatingLeaseRightOfUseAsset0.80.91.10.71.22.02.52.93.5
Percentage of Assets0.20.20.20.10.20.40.50.60.7
Percentage of Assets ar:DrillingAndCompletionRigs0.00.00.00.00.00.00.00.00.0

ar:GasGatheringLinesAndCompressorStations


Operating
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-30
Value117212081241127410701273130815351580
Percentage of OperatingLeaseRightOfUseAsset47.247.447.547.941.845.245.347.547.4
Percentage of Assets9.19.39.49.57.88.88.69.59.1
Percentage of Assets ar:GasGatheringLinesAndCompressorStations0.00.00.00.00.00.00.00.00.0

ar:OfficeSpace


Operating
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-30
Value353536373839404142
Percentage of OperatingLeaseRightOfUseAsset1.41.41.41.41.51.41.41.31.3
Percentage of Assets0.30.30.30.30.30.30.30.30.2
Percentage of Assets ar:OfficeSpace0.00.00.00.00.00.00.00.00.0

ar:ProcessingPlants


Operating
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-30
Value125612791302132414181440146015541587
Percentage of OperatingLeaseRightOfUseAsset50.550.249.849.855.451.250.648.147.7
Percentage of Assets9.89.89.99.910.39.99.69.69.2
Percentage of Assets ar:ProcessingPlants0.00.00.00.00.00.00.00.00.0

Other Assets Noncurrent

us-gaap:OtherAssetsNoncurrent

us-gaap:OtherAssetsNoncurrent


Other
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302012-12-31
Value1012131618202121343547455247483836379581117346667809068679145425132
Percentage of OtherAssetsNoncurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets0.10.10.10.10.10.10.10.10.20.20.30.30.30.30.30.30.20.30.70.60.90.20.50.50.60.70.60.71.10.60.60.90.9

Accounts Payable Current

us-gaap:AccountsPayableCurrent

us-gaap:AccountsPayableCurrent


Accounts
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302012-12-31
Value39412655363714324448669196736247513738172211250364337326352531598500428370311181
Percentage of AccountsPayableCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets0.30.30.20.40.30.30.10.20.30.30.40.60.60.50.40.30.30.30.31.21.61.82.62.52.62.84.66.46.26.05.65.55.0

Accrued Income Taxes Current

us-gaap:AccruedIncomeTaxesCurrent

us-gaap:AccruedIncomeTaxesCurrent


Accrued
Period End2021-03-312020-12-312020-09-302019-12-31
Value24402039
Percentage of AccruedIncomeTaxesCurrent100.0100.0100.0100.0
Percentage of Assets0.20.30.20.3

Accrued Liabilities Current

us-gaap:AccruedLiabilitiesCurrent

us-gaap:AccruedLiabilitiesCurrent


Accrued
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312012-12-31
Value4333503433443393674003923583844654574384224434294184163932452012411942021832351681781161257758
Percentage of AccruedLiabilitiesCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets3.42.72.62.62.52.52.62.42.12.23.02.92.82.72.92.92.72.82.81.71.51.71.41.51.51.91.51.91.41.81.21.6

Liabilities Current

us-gaap:LiabilitiesCurrent

us-gaap:LiabilitiesCurrent


Liabilities
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302012-12-31
Value18831221983103586497110401171122112668538137887897627176937238176115696457071025966105311551064860760622586376
Percentage of LiabilitiesCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets14.79.47.57.86.36.76.87.37.07.35.55.25.05.15.04.84.54.95.74.24.24.55.07.67.78.410.011.410.710.79.410.310.4

us-gaap:LiabilitiesCurrent us-gaap:ConsolidatedEntities

ar:ParentCompanyAndGuarantorSubsidiaries


Liabilities
Period End2021-06-302021-03-312020-12-31
Value18511207976
Percentage of LiabilitiesCurrent98.398.999.3
Percentage of Assets14.49.37.4
Percentage of Assets ar:ParentCompanyAndGuarantorSubsidiaries15.49.97.9

srt:GuarantorSubsidiaries


Liabilities
Period End2020-09-30
Value35
Percentage of LiabilitiesCurrent3.4
Percentage of Assets0.3
Percentage of Assets srt:GuarantorSubsidiaries5.5

srt:ParentCompany


Liabilities
Period End2020-12-312020-09-302019-12-31
Value97614601339
Percentage of LiabilitiesCurrent99.3141.0128.8
Percentage of Assets7.410.98.8
Percentage of Assets srt:ParentCompany7.911.98.8

us-gaap:LiabilitiesCurrent us-gaap:Ownership

ar:AnteroMidstream


Liabilities
Period End2020-12-312019-12-31
Value94242
Percentage of LiabilitiesCurrent9.623.3
Percentage of Assets0.71.6
Percentage of Assets ar:AnteroMidstream1.73.9

us-gaap:LiabilitiesCurrent us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName, us-gaap:EquityMethodInvestmentNonconsolidatedInvestee

ar:AnteroMidstream, us-gaap:EquityMethodInvestmentNonconsolidatedInvesteeOrGroupOfInvestees


Liabilities
Period End2021-06-302021-03-312020-12-312020-09-302019-12-31
Value117799461242
Percentage of LiabilitiesCurrent6.36.59.65.923.3
Percentage of Assets0.90.60.70.51.6
Percentage of Assets ar:AnteroMidstream us-gaap:EquityMethodInvestmentNonconsolidatedInvesteeOrGroupOfInvestees2.11.41.71.13.9

Operating Lease Liability Current

us-gaap:OperatingLeaseLiabilityCurrent

us-gaap:OperatingLeaseLiabilityCurrent


Operating
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-31
Value269264265250229294304
Percentage of OperatingLeaseLiabilityCurrent100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets2.12.02.01.91.72.02.0

Other Accrued Liabilities Current

us-gaap:OtherAccruedLiabilitiesCurrent

us-gaap:OtherAccruedLiabilitiesCurrent


Other
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312015-12-31
Value3534232357487757696893899378998485707092
Percentage of OtherAccruedLiabilitiesCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets0.30.30.20.20.40.30.50.40.40.40.60.60.60.50.60.60.60.50.50.7

Other Liabilities Current

us-gaap:OtherLiabilitiesCurrent

us-gaap:OtherLiabilitiesCurrent


Other
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312012-12-31
Value114.6882.3022.4676.8317.3156.8794.3674.1024.935108.42711141715161617191919199.211141312106.89.3988.0372.332
Percentage of OtherLiabilitiesCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets0.10.00.00.00.00.10.00.00.00.00.10.10.10.10.10.10.10.10.10.10.10.10.10.10.10.10.10.10.10.10.10.1

us-gaap:OtherLiabilitiesCurrent us-gaap:ConsolidatedEntities

ar:ParentCompanyAndGuarantorSubsidiaries


Other
Period End2021-06-302021-03-312020-12-31
Value17651121906
Percentage of OtherLiabilitiesCurrent14739.123931.039372.2
Percentage of Assets13.78.66.9
Percentage of Assets ar:ParentCompanyAndGuarantorSubsidiaries14.79.27.4

srt:ParentCompany


Other
Period End2020-12-312020-09-302019-12-31
Value906945942
Percentage of OtherLiabilitiesCurrent39372.238331.913697.6
Percentage of Assets6.97.16.2
Percentage of Assets srt:ParentCompany7.47.76.2

Liabilities Noncurrent

us-gaap:LiabilitiesNoncurrent us-gaap:ConsolidatedEntities

us-gaap:LiabilitiesNoncurrent

ar:ParentCompanyAndGuarantorSubsidiaries


Liabilities
Period End2021-06-302021-03-312020-12-31
Value522655406070
Percentage of LiabilitiesNoncurrent100.0100.0100.0
Percentage of Assets40.742.646.2
Percentage of Assets ar:ParentCompanyAndGuarantorSubsidiaries43.445.449.2

srt:ParentCompany


Liabilities
Period End2020-12-312020-09-302019-12-31
Value607063227186
Percentage of LiabilitiesNoncurrent100.00.00.0
Percentage of Assets46.247.447.3
Percentage of Assets srt:ParentCompany49.251.447.3

us-gaap:LiabilitiesNoncurrent us-gaap:Ownership

ar:AnteroMidstream


Liabilities
Period End2020-12-312019-12-31
Value30982897
Percentage of LiabilitiesNoncurrent51.00.0
Percentage of Assets23.619.1
Percentage of Assets ar:AnteroMidstream55.246.1

us-gaap:LiabilitiesNoncurrent us-gaap:Range, us-gaap:Restatement, us-gaap:StatementScenario, us-gaap:AdjustmentsForNewAccountingPronouncements

srt:Maximum, srt:RestatementAdjustment, srt:ScenarioForecast, ar:AccountingStandardsUpdate202006


Liabilities
Period End2022-01-01
Value30
Percentage of LiabilitiesNoncurrent0.0
Percentage of Assets0.0
Percentage of Assets srt:Maximum srt:RestatementAdjustment srt:ScenarioForecast ar:AccountingStandardsUpdate2020060.0

srt:Minimum, srt:RestatementAdjustment, srt:ScenarioForecast, ar:AccountingStandardsUpdate202006


Liabilities
Period End2022-01-01
Value15
Percentage of LiabilitiesNoncurrent0.0
Percentage of Assets0.0
Percentage of Assets srt:Minimum srt:RestatementAdjustment srt:ScenarioForecast ar:AccountingStandardsUpdate2020060.0

us-gaap:LiabilitiesNoncurrent us-gaap:Restatement, us-gaap:AdjustmentsForNewAccountingPronouncements

srt:RestatementAdjustment, ar:AccountingStandardsUpdate202006


Liabilities
Period End2020-08-05
Value62
Percentage of LiabilitiesNoncurrent0.0
Percentage of Assets0.0
Percentage of Assets srt:RestatementAdjustment ar:AccountingStandardsUpdate2020060.0

us-gaap:LiabilitiesNoncurrent us-gaap:Restatement, us-gaap:StatementScenario, us-gaap:AdjustmentsForNewAccountingPronouncements

srt:RestatementAdjustment, srt:ScenarioForecast, ar:AccountingStandardsUpdate202006


Liabilities
Period End2022-01-01
Value85
Percentage of LiabilitiesNoncurrent0.0
Percentage of Assets0.0
Percentage of Assets srt:RestatementAdjustment srt:ScenarioForecast ar:AccountingStandardsUpdate2020060.0

us-gaap:LiabilitiesNoncurrent us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName, us-gaap:EquityMethodInvestmentNonconsolidatedInvestee

ar:AnteroMidstream, us-gaap:EquityMethodInvestmentNonconsolidatedInvesteeOrGroupOfInvestees


Liabilities
Period End2021-06-302021-03-312020-12-312020-09-302019-12-31
Value30943110309831262897
Percentage of LiabilitiesNoncurrent59.256.151.00.00.0
Percentage of Assets24.123.923.623.419.1
Percentage of Assets ar:AnteroMidstream us-gaap:EquityMethodInvestmentNonconsolidatedInvesteeOrGroupOfInvestees55.856.155.255.146.1

Long Term Debt Noncurrent

us-gaap:LongTermDebtNoncurrent

us-gaap:LongTermDebtNoncurrent


Long
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302014-12-31
Value24152568300131583518370737583703360234755461548752884876480045105291477547034759424447024708440645004362
Percentage of LongTermDebtNoncurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets18.819.822.823.725.625.524.723.020.820.135.234.733.731.631.530.434.332.133.032.531.332.933.332.535.937.7

us-gaap:LongTermDebtNoncurrent us-gaap:LongtermDebtType

ar:ConvertibleSeniorNotes4.25PercentDue2026


Long
Period End2021-06-302021-03-312020-12-312020-09-30
Value5082169197
Percentage of LongTermDebtNoncurrent2.13.25.66.2
Percentage of Assets0.40.61.31.5
Percentage of Assets ar:ConvertibleSeniorNotes4.25PercentDue20260.00.00.00.0

Deferred Finance Costs Noncurrent Net

us-gaap:DeferredFinanceCostsNoncurrentNet

us-gaap:DeferredFinanceCostsNoncurrentNet


Deferred
Period End2020-12-312019-12-31
Value1619
Percentage of DeferredFinanceCostsNoncurrentNet100.0100.0
Percentage of Assets0.10.1

Deferred Income Tax Liabilities Net

us-gaap:DeferredIncomeTaxLiabilitiesNet

us-gaap:DeferredIncomeTaxLiabilitiesNet


Deferred
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312018-12-312014-12-31
Value214395412381529672781650794
Percentage of DeferredIncomeTaxLiabilitiesNet100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets1.73.03.12.93.94.65.14.26.9

Minority Interest

us-gaap:MinorityInterest

us-gaap:MinorityInterest


Minority
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-31
Value320353322315296821757748739726731641615146513991367136213521334109010911090
Percentage of MinorityInterest100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets2.52.72.52.42.25.34.84.84.84.84.94.24.110.39.610.19.59.69.88.78.79.4

us-gaap:MinorityInterest us-gaap:ConsolidatedEntities

srt:ParentCompany


Minority
Period End2020-09-30
Value315
Percentage of MinorityInterest100.0
Percentage of Assets2.4
Percentage of Assets srt:ParentCompany2.6

Other Liabilities Noncurrent

us-gaap:OtherLiabilitiesNoncurrent

us-gaap:OtherLiabilitiesNoncurrent


Other
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302012-12-31
Value585659646260585957566548474643525354556175808255494947444140353433
Percentage of OtherLiabilitiesNoncurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets0.50.40.50.50.50.40.40.40.30.30.40.30.30.30.30.40.30.40.40.40.60.60.60.40.40.40.40.50.50.60.50.60.9

Operating Lease Liability Noncurrent

us-gaap:OperatingLeaseLiabilityNoncurrent

us-gaap:OperatingLeaseLiabilityNoncurrent


Operating
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-31
Value2216228423482409233325202582
Percentage of OperatingLeaseLiabilityNoncurrent100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets17.317.617.918.017.017.317.0

Lessee Operating Lease Liability Payments Due Year Two

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearTwo

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearTwo


Lessee
Period End2021-06-302021-03-312020-12-312020-09-302019-12-31
Value574575579578554
Percentage of LesseeOperatingLeaseLiabilityPaymentsDueYearTwo100.0100.0100.0100.0100.0
Percentage of Assets4.54.44.44.33.6

Lessee Operating Lease Liability Payments Due Year Three

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearThree

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearThree


Lessee
Period End2021-06-302021-03-312020-12-312020-09-302019-12-31
Value565566575575542
Percentage of LesseeOperatingLeaseLiabilityPaymentsDueYearThree100.0100.0100.0100.0100.0
Percentage of Assets4.44.44.44.33.6

Lessee Operating Lease Liability Payments Due Year Four

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearFour

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearFour


Lessee
Period End2021-06-302021-03-312020-12-312020-09-302019-12-31
Value493493566566538
Percentage of LesseeOperatingLeaseLiabilityPaymentsDueYearFour100.0100.0100.0100.0100.0
Percentage of Assets3.83.84.34.23.5

Lessee Operating Lease Liability Payments Due Year Five

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearFive

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearFive


Lessee
Period End2021-06-302021-03-312020-12-312020-09-302019-12-31
Value442442493493530
Percentage of LesseeOperatingLeaseLiabilityPaymentsDueYearFive100.0100.0100.0100.0100.0
Percentage of Assets3.43.43.83.73.5

Lessee Operating Lease Liability Payments Due After Year Five

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueAfterYearFive

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueAfterYearFive


Lessee
Period End2021-06-302021-03-312020-12-312020-09-302019-12-31
Value11151115155815581851
Percentage of LesseeOperatingLeaseLiabilityPaymentsDueAfterYearFive100.0100.0100.0100.0100.0
Percentage of Assets8.78.611.911.712.2

Operating Lease Liability

us-gaap:OperatingLeaseLiability

us-gaap:OperatingLeaseLiability


Operating
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-31
Value2486254926132660256228142886323033303433
Percentage of OperatingLeaseLiability100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets19.319.619.919.918.619.419.020.019.219.9

Lessee Operating Lease Liability Payments Due

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDue

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDue


Lessee
Period End2021-06-302021-03-312020-12-312020-09-302019-12-31
Value40784230438445194639
Percentage of LesseeOperatingLeaseLiabilityPaymentsDue100.0100.0100.0100.0100.0
Percentage of Assets31.732.533.333.930.5

Lessee Operating Lease Liability Undiscounted Excess Amount

us-gaap:LesseeOperatingLeaseLiabilityUndiscountedExcessAmount

us-gaap:LesseeOperatingLeaseLiabilityUndiscountedExcessAmount


Lessee
Period End2021-06-302021-03-312020-12-312020-09-302019-12-31
Value15921680177018591753
Percentage of LesseeOperatingLeaseLiabilityUndiscountedExcessAmount100.0100.0100.0100.0100.0
Percentage of Assets12.412.913.513.911.5

Stockholders Equity

us-gaap:StockholdersEquity

us-gaap:StockholdersEquity


Stockholders
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302012-12-312011-12-312010-12-31
Value53975874576756686136659269707446833982927665791380548181814976557661763862626580623360585934577552186434547337513523353335981877167319581594
Percentage of StockholdersEquity100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets42.045.243.942.544.645.445.946.248.148.049.450.151.353.053.451.649.651.343.945.046.042.441.942.541.651.547.340.343.849.554.433.146.30.00.0

Stockholders Equity Including Portion Attributable To Noncontrolling Interest

us-gaap:StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest

us-gaap:StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest


Stockholders
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312013-12-312012-12-31
Value57186227609059836432659269707446833982928487867188028921887683878302825377287980760074207286711063095342438335981673
Percentage of StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets44.547.946.344.846.845.445.946.248.148.054.754.956.157.858.256.553.855.454.254.656.151.951.552.450.342.837.954.446.3

us-gaap:StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest us-gaap:Ownership

ar:AnteroMidstream


Stockholders
Period End2020-12-312019-12-31
Value24183143
Percentage of StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest39.745.1
Percentage of Assets18.420.7
Percentage of Assets ar:AnteroMidstream43.150.0

us-gaap:StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName, us-gaap:EquityMethodInvestmentNonconsolidatedInvestee

ar:AnteroMidstream, us-gaap:EquityMethodInvestmentNonconsolidatedInvesteeOrGroupOfInvestees


Stockholders
Period End2021-06-302021-03-312020-12-312020-09-302019-12-31
Value23282356241824853143
Percentage of StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest40.737.839.741.545.1
Percentage of Assets18.118.118.418.620.7
Percentage of Assets ar:AnteroMidstream us-gaap:EquityMethodInvestmentNonconsolidatedInvesteeOrGroupOfInvestees42.042.543.143.850.0

us-gaap:StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest us-gaap:StatementEquityComponents

us-gaap:AdditionalPaidInCapital


Stockholders
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302014-12-312013-12-31
Value636363176195616560986091613061246138613364856611659765886570656464356407529951315022425141224122409935133402
Percentage of StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest111.3101.4101.7103.094.892.487.982.273.674.076.476.274.973.874.078.377.577.668.664.366.157.356.658.065.080.294.5
Percentage of Assets49.548.647.146.244.441.940.338.035.435.541.841.842.042.743.144.241.743.037.235.137.029.829.130.432.730.451.4
Percentage of Assets us-gaap:AdditionalPaidInCapital0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:CommonStock


Stockholders
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302014-12-312013-12-31
Value3.1353.0112.6862.6852.6842.6892.9593.0413.0913.0873.0863.1713.1713.1653.1643.1553.1543.153.1493.0723.0422.7712.772.772.772.6212.62
Percentage of StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest0.10.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.10.1
Percentage of Assets0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0
Percentage of Assets us-gaap:CommonStock0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:NoncontrollingInterest


Stockholders
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302014-12-31
Value32035332231529682175774873972673164161514651399136713621352133410901090
Percentage of StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest5.65.75.35.34.69.78.78.58.38.28.77.77.519.017.518.018.418.618.817.324.9
Percentage of Assets2.52.72.52.42.25.34.84.84.84.84.94.24.110.39.610.19.59.69.88.79.4
Percentage of Assets us-gaap:NoncontrollingInterest0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:RetainedEarnings


Stockholders
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302014-12-312013-12-312012-12-31
Value-969.444-445.977-430.478-500.3083549883713192198215611771299145315891575108812231228959144512071803180816501116867193212
Percentage of StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest-17.0-7.2-7.1-8.40.57.612.017.726.426.013.915.016.517.817.713.014.714.912.418.115.924.324.823.217.719.85.412.7
Percentage of Assets-7.5-3.4-3.3-3.70.33.45.58.212.712.57.68.29.310.310.37.37.98.36.79.98.912.612.812.28.97.52.95.9
Percentage of Assets us-gaap:RetainedEarnings0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

Common Stock Value

us-gaap:CommonStockValue

us-gaap:CommonStockValue


Common
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-31
Value3.1353.0112.6862.6852.6842.6892.9593.0413.0913.0873.0863.1713.1713.1653.1643.1553.1543.153.1493.0723.0422.7712.772.772.772.7682.6212.6212.622.622.62
Percentage of CommonStockValue100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

Additional Paid In Capital

us-gaap:AdditionalPaidInCapital

us-gaap:AdditionalPaidInCapital


Additional
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-31
Value6363631761956165609860916130612461386133648566116597658865706564643564075299513150224251412241224099407835133488346334313402
Percentage of AdditionalPaidInCapital100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets49.548.647.146.244.441.940.338.035.435.541.841.842.042.743.144.241.743.037.235.137.029.829.130.432.732.730.437.443.148.151.4

Retained Earnings Accumulated Deficit

us-gaap:RetainedEarningsAccumulatedDeficit

us-gaap:RetainedEarningsAccumulatedDeficit


Retained
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302012-12-31
Value-969.444-445.977-430.478-500.308354988371319219821561177129914531589157510881223122895914451207180318081650111612618672605699193416212
Percentage of RetainedEarningsAccumulatedDeficit100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets-7.5-3.4-3.3-3.70.33.45.58.212.712.57.68.29.310.310.37.37.98.36.79.98.912.612.812.28.910.17.52.80.71.42.97.35.9

Minority Interest

us-gaap:MinorityInterest

us-gaap:MinorityInterest


Minority
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-31
Value320353322315296821757748739726731641615146513991367136213521334109010911090
Percentage of MinorityInterest100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets2.52.72.52.42.25.34.84.84.84.84.94.24.110.39.610.19.59.69.88.78.79.4

us-gaap:MinorityInterest us-gaap:ConsolidatedEntities

srt:ParentCompany


Minority
Period End2020-09-30
Value315
Percentage of MinorityInterest100.0
Percentage of Assets2.4
Percentage of Assets srt:ParentCompany2.6

Stock Issued During Period Value New Issues

us-gaap:StockIssuedDuringPeriodValueNewIssues

us-gaap:StockIssuedDuringPeriodValueNewIssues


Stock
Period End2021-06-302021-03-312016-12-312016-09-302016-06-152015-12-312015-09-302015-06-302015-03-31
Value125238175847530.00.139-0.182537
Percentage of StockIssuedDuringPeriodValueNewIssues100.0100.0100.0100.0100.00.0100.0100.0100.0
Percentage of Assets0.00.00.00.00.00.00.00.00.0

us-gaap:StockIssuedDuringPeriodValueNewIssues us-gaap:StatementEquityComponents

us-gaap:AdditionalPaidInCapital


Stock
Period End2021-06-302021-03-312016-12-312016-09-302015-12-312015-09-302015-06-302015-03-31
Value125238174840.00.139-0.182537
Percentage of StockIssuedDuringPeriodValueNewIssues99.999.9100.0100.00.0100.0100.0100.0
Percentage of Assets0.00.00.00.00.00.00.00.0
Percentage of Assets us-gaap:AdditionalPaidInCapital0.00.00.00.00.00.00.00.0

us-gaap:CommonStock


Stock
Period End2021-06-302021-03-312016-12-312016-09-302015-12-312015-09-302015-06-302015-03-31
Value0.1160.3140.0670.030.00.00.00.147
Percentage of StockIssuedDuringPeriodValueNewIssues0.10.10.00.00.00.0-0.00.0
Percentage of Assets0.00.00.00.00.00.00.00.0
Percentage of Assets us-gaap:CommonStock0.00.00.00.00.00.00.00.0

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

us-gaap:AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue

us-gaap:AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue


Adjustments
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-30
Value4.2495.6425.6997.9733.3293.8756.5498.90316192124262625262625231823
Percentage of AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue us-gaap:StatementEquityComponents

us-gaap:AdditionalPaidInCapital


Adjustments
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-30
Value4.2495.6425.6997.9733.3293.8756.5497.80114161821232423242423211722
Percentage of AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue100.0100.0100.0100.0100.0100.0100.087.690.488.888.989.290.391.091.692.292.291.492.993.695.9
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 us-gaap:AdditionalPaidInCapital0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

Minority Interest Decrease From Distributions To Noncontrolling Interest Holders

us-gaap:MinorityInterestDecreaseFromDistributionsToNoncontrollingInterestHolders

us-gaap:MinorityInterestDecreaseFromDistributionsToNoncontrollingInterestHolders


Minority
Period End2021-06-302021-03-312020-09-302020-06-302019-03-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-31
Value2124133.4131143696355504034272319171455-8.741-16.9554.338
Percentage of MinorityInterestDecreaseFromDistributionsToNoncontrollingInterestHolders100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:MinorityInterestDecreaseFromDistributionsToNoncontrollingInterestHolders us-gaap:StatementEquityComponents

us-gaap:NoncontrollingInterest


Minority
Period End2021-06-302021-03-312020-09-302020-06-302019-03-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-31
Value2124133.413784696355504034272319171455-8.741-16.9554.338
Percentage of MinorityInterestDecreaseFromDistributionsToNoncontrollingInterestHolders100.0100.0100.0100.068.6100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0
Percentage of Assets us-gaap:NoncontrollingInterest0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

Net Cash Provided By Used In Operating Activities

us-gaap:NetCashProvidedByUsedInOperatingActivities

us-gaap:NetCashProvidedByUsedInOperatingActivities


Net
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-31
Value308563243175115200147198218539821421297541313104525339333532623834016924623935119930022327420213982110106
Percentage of NetCashProvidedByUsedInOperatingActivities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax23.641.122.119.817.826.715.422.122.548.464.841.331.859.437.2146.436.052.10.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

Net Cash Provided By Used In Investing Activities

us-gaap:NetCashProvidedByUsedInInvestingActivities

us-gaap:NetCashProvidedByUsedInInvestingActivities


Net
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-31
Value-179.903-122.975-145.99865-262.927-186.681-216.163-279.741-340.769-204.817-580.385-597.992-608.778-563.569-513.323-550.765-709.069-688.473-420.471-936.308-519.064-519.295-461.295-498.086-599.542-739.236-1265.178-1070.601-1018.358-735.513-808.708-686.476-630.523-547.885-168.311
Percentage of NetCashProvidedByUsedInInvestingActivities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax-13.8-9.0-13.27.4-40.3-24.9-22.5-31.2-35.1-18.4-45.8-58.7-65.2-61.8-60.9-77.2-100.6-91.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

Net Cash Provided By Used In Financing Activities

us-gaap:NetCashProvidedByUsedInFinancingActivities

us-gaap:NetCashProvidedByUsedInFinancingActivities


Net
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-31
Value-124.097-440.756-97.132-241.415146-13.9966881122285-241.20412533816204-510.95349526298599268195287136318327130575680145661154755442363
Percentage of NetCashProvidedByUsedInFinancingActivities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax-9.5-32.2-8.8-27.122.5-1.97.19.112.725.6-19.012.436.31.824.3-71.670.334.70.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

Deferred Income Tax Expense Benefit

us-gaap:DeferredIncomeTaxExpenseBenefit

us-gaap:DeferredIncomeTaxExpenseBenefit


Deferred
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-31
Value-175.966-2.94628-173.878-142.404-109.985-111.177-272.94417287-131.35718-25.5739.12-400.213-45.07818131-254.637140-376.4944.81577335-84.089247369133-17.1-40.662696783-30.418
Percentage of DeferredIncomeTaxExpenseBenefit100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Depreciation Depletion And Amortization

us-gaap:DepreciationDepletionAndAmortization

us-gaap:DepreciationDepletionAndAmortization


Depreciation
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-30
Value18719420923821419919024124224026224323822821320620120222119919719116118817718215612410591756552403626
Percentage of DepreciationDepletionAndAmortization100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DepreciationDepletionAndAmortization us-gaap:ConsolidationItems

us-gaap:IntersegmentElimination


Depreciation
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312014-03-312013-03-31
Value-26.619-26.85-26.901-26.801-27.745-27.343-26.97-24.46-36.44714-0.958-0.124
Percentage of DepreciationDepletionAndAmortization-14.2-13.8-12.8-11.2-13.0-13.7-14.1-10.1-15.05.9-1.1-0.3

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

us-gaap:OperatingSegments, ar:AnteroMidstream


Depreciation
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value2626262627272624367.6522383632
Percentage of DepreciationDepletionAndAmortization14.213.812.811.213.013.714.110.115.03.28.715.915.414.3

us-gaap:OperatingSegments, ar:ExplorationAndProduction


Depreciation
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-31
Value1871942092382141991902412422182402042011951821761701741951721731671381661551611391109382
Percentage of DepreciationDepletionAndAmortization100.0100.0100.0100.0100.0100.0100.0100.0100.091.091.384.184.685.785.485.184.786.388.386.887.787.585.688.587.988.688.988.388.590.1

Increase Decrease In Accounts Payable

us-gaap:IncreaseDecreaseInAccountsPayable

us-gaap:IncreaseDecreaseInAccountsPayable


Increase
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-31
Value-9.84616-17.08418-19.931-1.251-27.0251.45318-21.371.135.22910-8.0424.7312.659-10.4731214-10.845-2.2135.6436.502-5.8815.092-0.513-12.24-2.9479.195-5.7185.641-3.1660.148-1.5847.695
Percentage of IncreaseDecreaseInAccountsPayable100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Increase Decrease In Accounts Receivable

us-gaap:IncreaseDecreaseInAccountsReceivable

us-gaap:IncreaseDecreaseInAccountsReceivable


Increase
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-31
Value0.4877.2-5.962-11.875-27.18554-17.395-8.38836-42.168195.584-2.033-8.2046.98511-20.387.192-29.78-2.279-7.147-0.65118-18.286-39.22429.4482019-3.36-2.4133.792-2.6110-22.322
Percentage of IncreaseDecreaseInAccountsReceivable100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Net Cash Provided By Used In Operating Activities

us-gaap:NetCashProvidedByUsedInOperatingActivities

us-gaap:NetCashProvidedByUsedInOperatingActivities


Net
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-31
Value308563243175115200147198218539821421297541313104525339333532623834016924623935119930022327420213982110106
Percentage of NetCashProvidedByUsedInOperatingActivities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax23.641.122.119.817.826.715.422.122.548.464.841.331.859.437.2146.436.052.10.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

Profit Loss

us-gaap:ProfitLoss

us-gaap:ProfitLoss


Profit
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-31
Value-534.451-11.10495-553.846-463.068-338.81-482.196-878.86442102518-77.972-67.27580529-90.039305-452.804268-575.4910175544-139.483399608203-42.285-94.759-223.02120131-47.997-7.035
Percentage of ProfitLoss100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax-40.9-0.88.6-62.3-71.0-45.1-50.2-98.04.392.01.5-7.6-7.28.962.8-12.65.740.40.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:ProfitLoss us-gaap:ConsolidatedEntities

ar:ParentCompanyAndGuarantorSubsidiaries


Profit
Period End2021-06-302021-03-31
Value-523.467-15.499
Percentage of ProfitLoss97.9139.6
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax-40.0-1.1
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax ar:ParentCompanyAndGuarantorSubsidiaries-106.8-1.3

srt:ParentCompany


Profit
Period End2020-12-31
Value-423.142
Percentage of ProfitLoss-443.9
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax-38.4
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax srt:ParentCompany-32.6

us-gaap:ProfitLoss us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName, us-gaap:EquityMethodInvestmentNonconsolidatedInvestee

ar:AnteroMidstream, us-gaap:EquityMethodInvestmentNonconsolidatedInvesteeOrGroupOfInvestees


Profit
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-06-30
Value808310588-392.933-197.006
Percentage of ProfitLoss-15.0-751.4-19.0-19.1116.0-467.2
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax6.16.111.913.6-52.40.0
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax ar:AnteroMidstream us-gaap:EquityMethodInvestmentNonconsolidatedInvesteeOrGroupOfInvestees0.00.00.00.00.00.0

us-gaap:ProfitLoss us-gaap:StatementEquityComponents

us-gaap:NoncontrollingInterest


Profit
Period End2021-06-302021-03-312020-09-302020-06-302019-03-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-30
Value-10.9844.395-18.2330.2364676696542454537322920151710
Percentage of ProfitLoss2.1-39.63.3-0.14.6-98.0-102.781.68.1-50.1112.812.2-7.311.2-3.6147.59.72.0
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax-0.80.3-2.00.04.27.57.47.25.16.36.44.90.00.00.00.00.00.0
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax us-gaap:NoncontrollingInterest0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:RetainedEarnings


Profit
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-30
Value-523.467-15.499-535.613-463.304-338.81-878.86442978-154.419-136.38514486-135.063-5.132268-485.772238-596.244-5.055158533
Percentage of ProfitLoss97.9139.696.7100.1100.0100.0100.095.4198.0202.718.491.9150.1-12.887.8107.388.8103.6-47.590.398.0
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax-40.0-1.1-60.2-71.0-45.1-98.04.387.8-15.1-14.61.657.7-18.9-0.735.50.00.00.00.00.00.0
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax us-gaap:RetainedEarnings0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

Share Based Compensation

us-gaap:ShareBasedCompensation

us-gaap:ShareBasedCompensation


Share
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-31
Value4.2495.6426.3165.6997.9733.3294.2323.8756.5498.9031316192124262625262625231823272726243229
Percentage of ShareBasedCompensation100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ShareBasedCompensation us-gaap:AwardType

ar:AnteroMidstreamPartnersPhantomAndRestrictedUnitAwards


Share
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-31
Value0.2840.5180.6380.4591.2620.160.4830.8670.9491.1252.5994.1934.3414.2184.5554.424.4434.0434.1173.9774.0133.9884.1634.2714.2674.425
Percentage of ShareBasedCompensation6.79.210.18.115.84.811.422.414.512.618.625.922.819.918.616.716.515.915.415.115.517.022.417.915.515.9

ar:CommonStockIssuedToDirectorsInLieuOfCashCompensation


Share
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-30
Value0.350.350.350.350.00.3690.2270.380.2650.5030.5450.5390.5140.5020.490.4890.4870.480.480.480.550.4720.0880.0750.0750.0750.0770.075
Percentage of ShareBasedCompensation8.26.25.56.10.011.15.49.84.05.63.93.32.72.42.01.81.81.91.81.82.12.00.50.30.30.30.30.3

us-gaap:PerformanceShares


Share
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-31
Value0.2231.5361.8391.8272.6310.9222.0420.3992.6662.9592.6411.0173.492.5112.93.0142.7482.1352.6682.6682.4660.883
Percentage of ShareBasedCompensation5.227.229.132.133.027.748.310.340.733.218.96.318.311.911.811.410.28.410.010.19.63.8

us-gaap:RestrictedStock


Share
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-31
Value3.3923.2383.4893.0634.081.8781.5142.2292.6243.9727.82910101316171818181818171110108.4368.6318.3978.2870.309
Percentage of ShareBasedCompensation79.857.455.253.751.256.435.857.540.144.656.061.753.663.565.567.769.371.570.570.670.374.460.844.737.130.432.734.725.51.1

Net Cash Provided By Used In Investing Activities

us-gaap:NetCashProvidedByUsedInInvestingActivities

us-gaap:NetCashProvidedByUsedInInvestingActivities


Net
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-31
Value-179.903-122.975-145.99865-262.927-186.681-216.163-279.741-340.769-204.817-580.385-597.992-608.778-563.569-513.323-550.765-709.069-688.473-420.471-936.308-519.064-519.295-461.295-498.086-599.542-739.236-1265.178-1070.601-1018.358-735.513-808.708-686.476-630.523-547.885-168.311
Percentage of NetCashProvidedByUsedInInvestingActivities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax-13.8-9.0-13.27.4-40.3-24.9-22.5-31.2-35.1-18.4-45.8-58.7-65.2-61.8-60.9-77.2-100.6-91.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

Payments To Acquire Property Plant And Equipment

us-gaap:PaymentsToAcquirePropertyPlantAndEquipment

us-gaap:PaymentsToAcquirePropertyPlantAndEquipment


Payments
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-09-302016-06-302016-03-312015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-31
Value18212314715126331131529234247153456756354549952167951698243551077012681102983731818670632549
Percentage of PaymentsToAcquirePropertyPlantAndEquipment100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:PaymentsToAcquirePropertyPlantAndEquipment us-gaap:ConsolidationItems

us-gaap:IntersegmentElimination


Payments
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-31
Value-45.976-28.389-31.459-41.851-55.431-67.983-129.925-120.875-125.18556-52.385-67.951-73.919-60.759-46.027-40.704-52.487-44.229-45.536-43.343-30.183-25.429-32.795-17.579-23.181-24.13-41.73-34.826-28.776-17.583-11.183-9.372-7.652-3.821
Percentage of PaymentsToAcquirePropertyPlantAndEquipment-25.2-23.1-21.3-27.7-21.0-21.8-41.1-41.4-36.612.0-9.8-12.0-13.1-11.1-9.2-7.8-7.7-8.60.0-4.4-6.9-5.00.00.00.0-3.1-3.3-3.2-2.9-2.4-1.4-1.4-1.2-0.7

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

us-gaap:OperatingSegments, ar:AnteroMidstream


Payments
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value45283141556712912012516127149130133
Percentage of PaymentsToAcquirePropertyPlantAndEquipment25.223.121.327.721.021.841.141.436.63.423.826.423.324.5

us-gaap:OperatingSegments, ar:ExplorationAndProduction


Payments
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-30
Value1821231471512633113152923423994594855064724024155844564859093754493633995446461119936817582578526
Percentage of PaymentsToAcquirePropertyPlantAndEquipment100.0100.0100.0100.0100.0100.0100.0100.0100.084.686.085.589.986.680.679.686.088.50.092.686.288.20.00.00.083.988.284.983.279.570.778.6

Net Cash Provided By Used In Financing Activities

us-gaap:NetCashProvidedByUsedInFinancingActivities

us-gaap:NetCashProvidedByUsedInFinancingActivities


Net
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-31
Value-124.097-440.756-97.132-241.415146-13.9966881122285-241.20412533816204-510.95349526298599268195287136318327130575680145661154755442363
Percentage of NetCashProvidedByUsedInFinancingActivities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax-9.5-32.2-8.8-27.122.5-1.97.19.112.725.6-19.012.436.31.824.3-71.670.334.70.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

Payments For Repurchase Of Common Stock

us-gaap:PaymentsForRepurchaseOfCommonStock

us-gaap:PaymentsForRepurchaseOfCommonStock


Payments
Period End2020-12-312020-09-302020-06-302020-03-312019-12-31
Value0.00.00.7534220
Percentage of PaymentsForRepurchaseOfCommonStock0.00.0100.0100.0100.0

Debt Instrument Interest Rate Stated Percentage

us-gaap:DebtInstrumentInterestRateStatedPercentage

us-gaap:DebtInstrumentInterestRateStatedPercentage


Debt
Period End2020-08-212014-05-23
Value4.250.0725
Percentage of DebtInstrumentInterestRateStatedPercentage100.0100.0
Percentage of LongTermDebtAndCapitalLeaseObligations0.00.0

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

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice us-gaap:AwardType

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice

us-gaap:EmployeeStockOption


Share
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-31
Value50.7850.6550.6450.6450.6150.6150.6450.650.650.5850.5550.5250.550.4950.4850.4750.4750.4750.4650.4650.4550.4450.4450.4350.4353.9253.9254.1554.1554.1554.15
Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Deferred Tax Liabilities

us-gaap:DeferredTaxLiabilities

us-gaap:DeferredTaxLiabilities


Deferred
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-31
Value4127816507799501370794347154
Percentage of DeferredTaxLiabilities100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DeferredTaxLiabilities us-gaap:Restatement

srt:RestatementAdjustment


Deferred
Period End2021-06-30
Value-34.0
Percentage of DeferredTaxLiabilities0.0

Deferred Tax Assets Net

us-gaap:DeferredTaxAssetsNet

us-gaap:DeferredTaxAssetsNet


Deferred
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-31
Value875709715772582540438439395
Percentage of DeferredTaxAssetsNet100.0100.0100.0100.0100.0100.0100.0100.0100.0

Deferred Tax Assets Valuation Allowance

us-gaap:DeferredTaxAssetsValuationAllowance

us-gaap:DeferredTaxAssetsValuationAllowance


Deferred
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-31
Value464645171627262647
Percentage of DeferredTaxAssetsValuationAllowance100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DeferredTaxAssetsValuationAllowance us-gaap:Restatement

srt:RestatementAdjustment


Deferred
Period End2021-06-30
Value-14.0
Percentage of DeferredTaxAssetsValuationAllowance0.0

ar:AmortizationOfDeferredRevenue

ar:AmortizationOfDeferredRevenue


Amortization
Period End2021-06-302021-03-312020-12-312020-09-30
Value11119.3325.175
Percentage of AmortizationOfDeferredRevenue100.0100.0100.0100.0

ar:CashDistribution us-gaap:CounterpartyName, us-gaap:StatementScenario

ar:CashDistribution

ar:SixthStreetPartnersLlc, srt:ScenarioForecast


Cash
Period End2021-06-30
Value51
Percentage of CashDistribution100.0

ar:CashPaidForAmountsIncludedInMeasurementOfLeaseLiabilitiesFinanceLeases

ar:CashPaidForAmountsIncludedInMeasurementOfLeaseLiabilitiesFinanceLeases


Cash
Period End2020-09-302020-06-302020-03-312019-09-302019-06-302019-03-31
Value287000.0278000.0439000.0303000.0873000.0791000.0
Percentage of CashPaidForAmountsIncludedInMeasurementOfLeaseLiabilitiesFinanceLeases100.0100.0100.0100.0100.0100.0

ar:CashPaidForAmountsIncludedInMeasurementOfLeaseLiabilitiesOperatingLeases

ar:CashPaidForAmountsIncludedInMeasurementOfLeaseLiabilitiesOperatingLeases


Cash
Period End2020-09-302020-06-302020-03-312019-09-302019-06-302019-03-31
Value510339385281253202
Percentage of CashPaidForAmountsIncludedInMeasurementOfLeaseLiabilitiesOperatingLeases100.0100.0100.0100.0100.0100.0

ar:ChangeInCapitalExpendituresIncurredButNotYetPaid

ar:ChangeInCapitalExpendituresIncurredButNotYetPaid


Change
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-30
Value6.70735-138.921-17.00350106.20611-56.06522-55.0425.23614-12.691-2.53734-21.162-10.02-37.14133
Percentage of ChangeInCapitalExpendituresIncurredButNotYetPaid100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

ar:DebtInstrumentPremiumOnPrincipalAmountRedeemed us-gaap:LongtermDebtType, us-gaap:SubsequentEventType

ar:DebtInstrumentPremiumOnPrincipalAmountRedeemed

ar:SeniorNotesDue2026, us-gaap:SubsequentEvent


Debt
Period End2021-07-01
Value15
Percentage of DebtInstrumentPremiumOnPrincipalAmountRedeemed100.0

ar:DebtInstrumentRedemptionPriceUponChangeOfControlAsPercentageOfPrincipalAmount us-gaap:LongtermDebtType

ar:DebtInstrumentRedemptionPriceUponChangeOfControlAsPercentageOfPrincipalAmount

ar:SeniorNotes500PercentDue2025


Debt
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value0101.099.9901.010001.010001.010
Percentage of DebtInstrumentRedemptionPriceUponChangeOfControlAsPercentageOfPrincipalAmount0.0100.0100.00.0100.00.00.00.0100.00.00.00.0100.00.0

ar:SeniorNotes5625PercentDue2023


Debt
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312015-12-31
Value101.0099.9901.010001.010001.0100
Percentage of DebtInstrumentRedemptionPriceUponChangeOfControlAsPercentageOfPrincipalAmount100.00.0100.00.0100.00.00.00.0100.00.00.00.0100.00.00.0

ar:DebtInstrumentRedemptionPriceUponChangeOfControlAsPercentageOfPrincipalAmount us-gaap:LongtermDebtType, us-gaap:SubsequentEventType

ar:SeniorNotes7625PercentDue2029, us-gaap:SubsequentEvent


Debt
Period End2021-01-26
Value101.0
Percentage of DebtInstrumentRedemptionPriceUponChangeOfControlAsPercentageOfPrincipalAmount0.0

ar:SeniorNotes8375PercentDue2026, us-gaap:SubsequentEvent


Debt
Period End2021-01-04
Value101.0
Percentage of DebtInstrumentRedemptionPriceUponChangeOfControlAsPercentageOfPrincipalAmount0.0

ar:DepletionDepreciationAmortizationAndAccretion

ar:DepletionDepreciationAmortizationAndAccretion


Depletion
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
Value188194209239215200191242243241263243238228214207201203222199197192162189177182157124
Percentage of DepletionDepreciationAmortizationAndAccretion100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

ar:EquitizationOfConvertibleNotes

ar:EquitizationOfConvertibleNotes


Equitization
Period End2021-06-302021-03-31
Value2560
Percentage of EquitizationOfConvertibleNotes100.0100.0

ar:ExtinguishmentOfDebtWeightedAverageDiscount

ar:ExtinguishmentOfDebtWeightedAverageDiscount


Extinguishment
Period End2020-12-312020-09-302020-06-30
Value-4.013.00.17
Percentage of ExtinguishmentOfDebtWeightedAverageDiscount100.0100.0100.0

ar:ExtinguishmentOfDebtWeightedAverageDiscount us-gaap:DebtInstrument

ar:DebtRepurchasedDutchTenderOffer


Extinguishment
Period End2020-09-30
Value10.0
Percentage of ExtinguishmentOfDebtWeightedAverageDiscount76.9

ar:FinanceLeaseCost

ar:FinanceLeaseCost


Finance
Period End2021-06-302021-03-312020-06-302020-03-31
Value132000.0155000.0414000.0181000.0
Percentage of FinanceLeaseCost100.0100.0100.0100.0

ar:GainLossOnConvertibleNoteEquitization

ar:GainLossOnConvertibleNoteEquitization


Gain
Period End2021-06-302021-03-31
Value-11731000.0-39046000.0
Percentage of GainLossOnConvertibleNoteEquitization100.0100.0

ar:GainLossOnInterestsConveyed us-gaap:CounterpartyName

ar:GainLossOnInterestsConveyed

ar:QlCapitalPartners


Gain
Period End2021-03-31
Value0
Percentage of GainLossOnInterestsConveyed0.0

ar:GatheringAndCompressionFeesPaid us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName

ar:GatheringAndCompressionFeesPaid

ar:AnteroMidstream


Gathering
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-31
Value184177176181166156157171163152
Percentage of GatheringAndCompressionFeesPaid100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

ar:ImpairmentOfOilAndGasPropertiesProved us-gaap:ConsolidationItems

ar:ImpairmentOfOilAndGasPropertiesProved

us-gaap:IntersegmentElimination


Impairment
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-30
Value0.0-1.379-8.149-0.9470.0-664.544-303.978-457.478-0.594
Percentage of ImpairmentOfOilAndGasPropertiesProved0.0100.0100.0100.00.0100.0100.0100.0100.0

ar:ImpairmentOfOilAndGasPropertiesProved us-gaap:ConsolidationItems, us-gaap:StatementBusinessSegments

us-gaap:OperatingSegments, ar:AnteroMidstream


Impairment
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-30
Value0.01.3798.1490.9470.06643034650.5946.9820.01.157
Percentage of ImpairmentOfOilAndGasPropertiesProved0.0-100.0-100.0-100.00.0-100.0-100.0-101.7-100.00.00.00.0

ar:ImpairmentOfOilAndGasUnprovedProperties

ar:ImpairmentOfOilAndGasUnprovedProperties


Impairment
Period End2020-12-312020-09-302019-12-312019-09-30
Value682946160
Percentage of ImpairmentOfOilAndGasUnprovedProperties100.0100.0100.0100.0

ar:IncreaseDecreaseInAccruedRevenue

ar:IncreaseDecreaseInAccruedRevenue


Increase
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-31
Value4721868353-116.56636-27.584-56.389-109.6771203241-20.1996614-1.438-41.9016563-2.9678.20412-9.674-40.437-25.654474.461-6.1224810
Percentage of IncreaseDecreaseInAccruedRevenue100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

ar:IncreaseDecreaseInOtherFinancingAssets

ar:IncreaseDecreaseInOtherFinancingAssets


Increase
Period End2021-06-302021-03-312020-06-302020-03-31
Value-335000.0-262000.0-595000.070000.0
Percentage of IncreaseDecreaseInOtherFinancingAssets100.0100.0100.0100.0

ar:IncreaseDecreaseInOtherFinancingLiabilities

ar:IncreaseDecreaseInOtherFinancingLiabilities


Increase
Period End2021-06-302021-03-31
Value2000.0-79000.0
Percentage of IncreaseDecreaseInOtherFinancingLiabilities100.0100.0

ar:IncreaseDecreaseInRevenueDistributionsPayable

ar:IncreaseDecreaseInRevenueDistributionsPayable


Increase
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-31
Value-14.4878449-24.8433.773-33.333-30.663-62.381-0.034-9.7616434-26.67328-11.354174.37634-8.213372.1362.969-31.564-29.3687.4261.1031215173927
Percentage of IncreaseDecreaseInRevenueDistributionsPayable100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

ar:InvestmentsInAffiliatesSubsidiariesAssociatesAndJointVenturesEliminationOfIntercompanyProfit us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName, us-gaap:EquityMethodInvestmentNonconsolidatedInvestee

ar:InvestmentsInAffiliatesSubsidiariesAssociatesAndJointVenturesEliminationOfIntercompanyProfit

ar:AnteroMidstream, us-gaap:EquityMethodInvestmentNonconsolidatedInvesteeOrGroupOfInvestees


Investments
Period End2021-06-302021-03-31
Value1010
Percentage of InvestmentsInAffiliatesSubsidiariesAssociatesAndJointVenturesEliminationOfIntercompanyProfit100.0100.0

ar:LongTermDebtRedemptionPriceDueToChangeOfControlAsPercentageOfPrincipalAmount us-gaap:LongtermDebtType

ar:LongTermDebtRedemptionPriceDueToChangeOfControlAsPercentageOfPrincipalAmount

ar:SeniorNotes5.375PercentDue2030


Long
Period End2021-06-01
Value101.0
Percentage of LongTermDebtRedemptionPriceDueToChangeOfControlAsPercentageOfPrincipalAmount100.0

ar:SeniorNotes7625PercentDue2029


Long
Period End2021-01-26
Value101.0
Percentage of LongTermDebtRedemptionPriceDueToChangeOfControlAsPercentageOfPrincipalAmount0.0

ar:SeniorNotes8375PercentDue2026


Long
Period End2021-01-04
Value101.0
Percentage of LongTermDebtRedemptionPriceDueToChangeOfControlAsPercentageOfPrincipalAmount0.0

ar:LongTermDebtRedemptionPriceWithNetProceedsFromEquityOfferingsAsPercentageOfPrincipalAmount us-gaap:DebtInstrumentRedemptionPeriod, us-gaap:LongtermDebtType

ar:LongTermDebtRedemptionPriceWithNetProceedsFromEquityOfferingsAsPercentageOfPrincipalAmount

ar:DebtInstrumentRedemptionPeriodOnOrBefore01February2024, ar:SeniorNotes7625PercentDue2029


Long
Period End2021-01-26
Value107.62
Percentage of LongTermDebtRedemptionPriceWithNetProceedsFromEquityOfferingsAsPercentageOfPrincipalAmount100.0

ar:DebtInstrumentRedemptionPeriodOnOrBefore01March2025, ar:SeniorNotes5.375PercentDue2030


Long
Period End2021-06-01
Value105.38
Percentage of LongTermDebtRedemptionPriceWithNetProceedsFromEquityOfferingsAsPercentageOfPrincipalAmount0.0

ar:DebtInstrumentRedemptionPeriodOnOrBefore15January2024, ar:SeniorNotes8375PercentDue2026


Long
Period End2021-01-04
Value108.38
Percentage of LongTermDebtRedemptionPriceWithNetProceedsFromEquityOfferingsAsPercentageOfPrincipalAmount0.0

ar:LongTermDebtRedemptionPriceWithNetProceedsFromEquityOfferingsAsPercentageOfPrincipalAmount us-gaap:DebtInstrumentRedemptionPeriod, us-gaap:LongtermDebtType, us-gaap:SubsequentEventType

ar:DebtInstrumentRedemptionPeriodOnOrBefore01February2024, ar:SeniorNotes7625PercentDue2029, us-gaap:SubsequentEvent


Long
Period End2021-01-26
Value107.62
Percentage of LongTermDebtRedemptionPriceWithNetProceedsFromEquityOfferingsAsPercentageOfPrincipalAmount100.0

ar:DebtInstrumentRedemptionPeriodOnOrBefore15January2024, ar:SeniorNotes8375PercentDue2026, us-gaap:SubsequentEvent


Long
Period End2021-01-04
Value108.38
Percentage of LongTermDebtRedemptionPriceWithNetProceedsFromEquityOfferingsAsPercentageOfPrincipalAmount0.0

ar:LongTermDebtRedemptionWithNetProceedsFromEquityOfferingsAsPercentageOfPrincipalAmount us-gaap:DebtInstrumentRedemptionPeriod, us-gaap:LongtermDebtType

ar:LongTermDebtRedemptionWithNetProceedsFromEquityOfferingsAsPercentageOfPrincipalAmount

ar:DebtInstrumentRedemptionPeriodOnOrBefore01February2024, ar:SeniorNotes7625PercentDue2029


Long
Period End2021-01-26
Value35.0
Percentage of LongTermDebtRedemptionWithNetProceedsFromEquityOfferingsAsPercentageOfPrincipalAmount100.0

ar:DebtInstrumentRedemptionPeriodOnOrBefore15January2024, ar:SeniorNotes8375PercentDue2026


Long
Period End2021-01-04
Value35.0
Percentage of LongTermDebtRedemptionWithNetProceedsFromEquityOfferingsAsPercentageOfPrincipalAmount0.0

ar:LongTermDebtRedemptionWithNetProceedsFromEquityOfferingsAsPercentageOfPrincipalAmount us-gaap:DebtInstrumentRedemptionPeriod, us-gaap:LongtermDebtType, us-gaap:SubsequentEventType

ar:DebtInstrumentRedemptionPeriodOnOrBefore01February2024, ar:SeniorNotes7625PercentDue2029, us-gaap:SubsequentEvent


Long
Period End2021-01-26
Value35.0
Percentage of LongTermDebtRedemptionWithNetProceedsFromEquityOfferingsAsPercentageOfPrincipalAmount100.0

ar:DebtInstrumentRedemptionPeriodOnOrBefore15January2024, ar:SeniorNotes8375PercentDue2026, us-gaap:SubsequentEvent


Long
Period End2021-01-04
Value35.0
Percentage of LongTermDebtRedemptionWithNetProceedsFromEquityOfferingsAsPercentageOfPrincipalAmount0.0

ar:OperatingLeaseCapitalized

ar:OperatingLeaseCapitalized


Operating
Period End2020-09-302020-06-302020-03-312019-09-302019-06-302019-03-31
Value322633535355
Percentage of OperatingLeaseCapitalized100.0100.0100.0100.0100.0100.0

ar:PaymentsForProceedsFromSettledDerivativeInstrumentsOperatingActivities

ar:PaymentsForProceedsFromSettledDerivativeInstrumentsOperatingActivities


Payments
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-31
Value-70.2735.32253215313210631204497-25.2577195101351-61.479-31.064-44.8491816-196.711-292.501-324.347-269.933-205.919-195.88-184.84-78.451-57.451-0.9531.071-54.259
Percentage of PaymentsForProceedsFromSettledDerivativeInstrumentsOperatingActivities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

ar:PercentageOfPaymentOfCapacity us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName

ar:PercentageOfPaymentOfCapacity

ar:AnteroMidstream


Percentage
Period End2021-06-302021-03-312020-12-31
Value070.00
Percentage of PercentageOfPaymentOfCapacity0.0100.00.0

ar:PercentageOfUtilizingCapacity us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName

ar:PercentageOfUtilizingCapacity

ar:AnteroMidstream


Percentage
Period End2021-06-302021-03-312020-12-31
Value075.00
Percentage of PercentageOfUtilizingCapacity0.0100.00.0

ar:ProceedsFromDerivativeMonetizations

ar:ProceedsFromDerivativeMonetizations


Proceeds
Period End2020-12-312017-12-31
Value-9.0660.0
Percentage of ProceedsFromDerivativeMonetizations100.00.0

ar:ProceedsFromSaleOfOverridingRoyaltyInterestsInMiningProperties

ar:ProceedsFromSaleOfOverridingRoyaltyInterestsInMiningProperties


Proceeds
Period End2020-12-312020-08-10
Value-0.044215
Percentage of ProceedsFromSaleOfOverridingRoyaltyInterestsInMiningProperties100.0100.0

ar:ProceedsFromSettlementOfWaterEarnout

ar:ProceedsFromSettlementOfWaterEarnout


Proceeds
Period End2020-12-312020-09-302020-06-302020-03-31
Value0.00.00.0125
Percentage of ProceedsFromSettlementOfWaterEarnout0.00.00.0100.0

ar:RepurchaseOfEquityComponentOfConvertibleNote us-gaap:LongtermDebtType, us-gaap:TypeOfArrangement

ar:RepurchaseOfEquityComponentOfConvertibleNote

ar:ConvertibleSeniorNotes4.25PercentDue2026, ar:ConvertibleNoteRepurchaseWithShareOffering


Repurchase
Period End2021-03-31
Value116
Percentage of RepurchaseOfEquityComponentOfConvertibleNote100.0

ar:RevenueIntersegment

ar:RevenueIntersegment


Revenue
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-30
Value-0.6190.640.6170.6750.7070.7980.8111.4811.714
Percentage of RevenueIntersegment100.0100.0100.0100.0100.0100.0100.0100.0100.0

ar:RevenueIntersegment us-gaap:ConsolidationItems

us-gaap:IntersegmentElimination


Revenue
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-30
Value17-224.121-203.86-233.415-219.7360.7980.8111.4811.7144.582-171.982-266.557-250.636
Percentage of RevenueIntersegment-2854.3-35018.9-33040.5-34580.0-31080.1100.0100.0100.0100.00.00.00.00.0

ar:RevenueIntersegment us-gaap:ConsolidationItems, us-gaap:StatementBusinessSegments

us-gaap:OperatingSegments, ar:AnteroMidstream


Revenue
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-30
Value-17.668224203233219243239243255
Percentage of RevenueIntersegment2854.335018.933040.534580.031080.130539.829478.116461.514910.9

us-gaap:OperatingSegments, ar:ExplorationAndProduction


Revenue
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-30
Value-0.6190.640.6170.6750.7070.7980.8131.4811.76
Percentage of RevenueIntersegment100.0100.0100.0100.0100.0100.0100.2100.0102.7

ar:RevenueThirdParty

ar:RevenueThirdParty


Revenue
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-30
Value48912031308379484131695111171297103210451076989
Percentage of RevenueThirdParty100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

ar:RevenueThirdParty us-gaap:ConsolidationItems

us-gaap:IntersegmentElimination


Revenue
Period End2021-06-30
Value-250.455
Percentage of RevenueThirdParty-51.1

ar:RevenueThirdParty us-gaap:ConsolidationItems, us-gaap:StatementBusinessSegments

us-gaap:OperatingSegments, ar:AnteroMidstream


Revenue
Period End2021-06-302019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-30
Value2500.00.00.0460.0046.0454.8455.518
Percentage of RevenueThirdParty51.10.00.00.00.00.60.50.6

us-gaap:OperatingSegments, ar:ExplorationAndProduction


Revenue
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-30
Value32410381199288419127086010701234941974982823
Percentage of RevenueThirdParty66.286.391.775.986.796.590.495.895.191.293.291.283.3

us-gaap:OperatingSegments, ar:Marketing


Revenue
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-30
Value165164108916446914663916489160
Percentage of RevenueThirdParty33.813.78.324.113.33.59.64.24.98.86.28.316.2

ar:RevenuesFromDerivativesAndOtherSources

ar:RevenuesFromDerivativesAndOtherSources


Revenues
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value-818.892-165.966206-508.901-167.308566-7.063222330-77.261-222.3875655116178-65.95785438
Percentage of RevenuesFromDerivativesAndOtherSources100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

ar:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsCancelledInPeriodWeightedAverageGrantDateFairValue us-gaap:AwardType

ar:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsCancelledInPeriodWeightedAverageGrantDateFairValue

us-gaap:PerformanceShares


Share
Period End2021-06-302021-03-312020-12-31
Value-6.4525.640.89
Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsCancelledInPeriodWeightedAverageGrantDateFairValue100.0100.0100.0

ar:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNumberVestingPercentage us-gaap:Range, us-gaap:AwardType

ar:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNumberVestingPercentage

srt:Maximum, ar:PsuAwardsBasedOnLeverageRatio


Share
Period End2021-04-30
Value200.0
Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNumberVestingPercentage100.0

srt:Maximum, us-gaap:PerformanceShares


Share
Period End2021-04-302020-07-31
Value200.0150.0
Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNumberVestingPercentage100.00.0

ar:SubsidiaryUnitsIssuedDuringPeriodValue

ar:SubsidiaryUnitsIssuedDuringPeriodValue


Subsidiary
Period End2021-03-312020-06-30
Value51300
Percentage of SubsidiaryUnitsIssuedDuringPeriodValue100.0100.0

ar:SubsidiaryUnitsIssuedDuringPeriodValue us-gaap:StatementEquityComponents

us-gaap:NoncontrollingInterest


Subsidiary
Period End2021-03-312020-06-30
Value51300
Percentage of SubsidiaryUnitsIssuedDuringPeriodValue100.0100.0

us-gaap:AdjustmentsToAdditionalPaidInCapitalEquityComponentOfConvertibleDebt

us-gaap:AdjustmentsToAdditionalPaidInCapitalEquityComponentOfConvertibleDebt


Adjustments
Period End2021-06-302021-03-312020-09-30
Value-79.497-116.38161
Percentage of AdjustmentsToAdditionalPaidInCapitalEquityComponentOfConvertibleDebt100.0100.0100.0

us-gaap:AdjustmentsToAdditionalPaidInCapitalEquityComponentOfConvertibleDebt us-gaap:StatementEquityComponents

us-gaap:AdditionalPaidInCapital


Adjustments
Period End2021-06-302021-03-312020-09-30
Value-79.497-116.38161
Percentage of AdjustmentsToAdditionalPaidInCapitalEquityComponentOfConvertibleDebt100.0100.0100.0

us-gaap:AmortizationOfFinancingCostsAndDiscounts

us-gaap:AmortizationOfFinancingCostsAndDiscounts


Amortization
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-31
Value3.3414.5364.8452.9581.9932.442.502
Percentage of AmortizationOfFinancingCostsAndDiscounts100.0100.0100.0100.0100.0100.0100.0

us-gaap:AssetImpairmentCharges

us-gaap:AssetImpairmentCharges


Asset
Period End2021-06-302021-03-312020-06-302020-03-312019-03-312018-12-312018-09-302018-06-30
Value9.30334376996.9820.01.1578.501
Percentage of AssetImpairmentCharges100.0100.0100.0100.0100.00.0100.0100.0

us-gaap:AssetRetirementObligationAccretionExpense

us-gaap:AssetRetirementObligationAccretionExpense


Asset
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-30
Value1331000.0788000.091000.01115000.01111000.01104000.0941000.0927000.0918000.0976000.0718000.0710000.0700000.0690000.0666000.0658000.0649000.0637000.0627000.0628000.0620000.0598000.0428000.0419000.0408000.0400000.0340000.0320000.0309000.0302000.0268000.0266000.0267000.0264000.030000.025000.0
Percentage of AssetRetirementObligationAccretionExpense100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:AssetRetirementObligationLiabilitiesIncurred

us-gaap:AssetRetirementObligationLiabilitiesIncurred


Asset
Period End2021-06-302021-03-312020-12-31
Value567000.070000.0285000.0
Percentage of AssetRetirementObligationLiabilitiesIncurred100.0100.0100.0

us-gaap:AssetRetirementObligationLiabilitiesSettled

us-gaap:AssetRetirementObligationLiabilitiesSettled


Asset
Period End2020-12-31
Value0
Percentage of AssetRetirementObligationLiabilitiesSettled0.0

us-gaap:DebtInstrumentConvertibleThresholdPercentageOfStockPriceTrigger us-gaap:StatementScenario, us-gaap:LongtermDebtType

us-gaap:DebtInstrumentConvertibleThresholdPercentageOfStockPriceTrigger

ar:DebtInstrumentConvertibleThresholdPercentageMaximum, ar:ConvertibleSeniorNotes4.25PercentDue2026


Debt
Period End2020-08-21
Value130.0
Percentage of DebtInstrumentConvertibleThresholdPercentageOfStockPriceTrigger100.0

ar:DebtInstrumentConvertibleThresholdPercentageMinimum, ar:ConvertibleSeniorNotes4.25PercentDue2026


Debt
Period End2020-08-21
Value98.0
Percentage of DebtInstrumentConvertibleThresholdPercentageOfStockPriceTrigger75.4

us-gaap:DebtInstrumentInterestRateDuringPeriod us-gaap:Restatement, us-gaap:AdjustmentsForNewAccountingPronouncements

us-gaap:DebtInstrumentInterestRateDuringPeriod

srt:RestatementAdjustment, ar:AccountingStandardsUpdate202006


Debt
Period End2021-06-302021-03-312020-09-30
Value015.111.7
Percentage of DebtInstrumentInterestRateDuringPeriod0.0100.0100.0

us-gaap:DebtInstrumentRedemptionPricePercentage us-gaap:DebtInstrumentRedemptionPeriod, us-gaap:LongtermDebtType

us-gaap:DebtInstrumentRedemptionPricePercentage

ar:DebtInstrumentRedemptionPeriodOnOrAfter01February2024, ar:SeniorNotes7625PercentDue2029


Debt
Period End2021-01-26
Value103.81
Percentage of DebtInstrumentRedemptionPricePercentage100.0

ar:DebtInstrumentRedemptionPeriodOnOrAfter01February2027, ar:SeniorNotes7625PercentDue2029


Debt
Period End2021-01-26
Value100.0
Percentage of DebtInstrumentRedemptionPricePercentage96.3

ar:DebtInstrumentRedemptionPeriodOnOrAfter01March2020, ar:SeniorNotes500PercentDue2025


Debt
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value102.7101.03750001.03750001.03750
Percentage of DebtInstrumentRedemptionPricePercentage0.00.00.00.00.00.00.00.00.00.00.00.0

ar:DebtInstrumentRedemptionPeriodOnOrAfter15January2024, ar:SeniorNotes8375PercentDue2026


Debt
Period End2021-01-04
Value104.19
Percentage of DebtInstrumentRedemptionPricePercentage0.0

ar:DebtInstrumentRedemptionPeriodOnOrAfter15January2026, ar:SeniorNotes8375PercentDue2026


Debt
Period End2021-01-04
Value100.0
Percentage of DebtInstrumentRedemptionPricePercentage0.0

ar:DebtInstrumentRedemptionPeriodOnOrAfterJune12020, ar:SeniorNotes5125PercentDue2022


Debt
Period End2020-12-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-312016-06-302016-03-31
Value099.001.0001.0001.001.0
Percentage of DebtInstrumentRedemptionPricePercentage0.00.00.00.00.00.00.00.00.00.00.00.0

ar:DebtInstrumentRedemptionPeriodOnOrAfterJune12021, ar:SeniorNotes5625PercentDue2023


Debt
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312016-06-302016-03-312015-12-31
Value100.0099.001.00001.00001.0001.00
Percentage of DebtInstrumentRedemptionPricePercentage0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

ar:DebtInstrumentRedemptionPeriodPriorTo01February2024, ar:SeniorNotes7625PercentDue2029


Debt
Period End2021-01-26
Value100.0
Percentage of DebtInstrumentRedemptionPricePercentage96.3

ar:DebtInstrumentRedemptionPeriodPriorTo01March2025, ar:SeniorNotes5.375PercentDue2030


Debt
Period End2021-06-01
Value100.0
Percentage of DebtInstrumentRedemptionPricePercentage0.0

ar:DebtInstrumentRedemptionPeriodPriorTo15January2024, ar:SeniorNotes8375PercentDue2026


Debt
Period End2021-01-04
Value100.0
Percentage of DebtInstrumentRedemptionPricePercentage0.0

us-gaap:DebtInstrumentRedemptionPricePercentage us-gaap:DebtInstrumentRedemptionPeriod, us-gaap:LongtermDebtType, us-gaap:SubsequentEventType

ar:DebtInstrumentRedemptionPeriodOnOrAfter15January2024, ar:SeniorNotes8375PercentDue2026, us-gaap:SubsequentEvent


Debt
Period End2021-01-04
Value104.19
Percentage of DebtInstrumentRedemptionPricePercentage0.0

ar:DebtInstrumentRedemptionPeriodOnOrAfter15January2026, ar:SeniorNotes8375PercentDue2026, us-gaap:SubsequentEvent


Debt
Period End2021-01-04
Value100.0
Percentage of DebtInstrumentRedemptionPricePercentage0.0

ar:DebtInstrumentRedemptionPeriodPriorTo01February2024, ar:SeniorNotes7625PercentDue2029, us-gaap:SubsequentEvent


Debt
Period End2021-01-26
Value100.0
Percentage of DebtInstrumentRedemptionPricePercentage96.3

ar:DebtInstrumentRedemptionPeriodPriorTo15January2024, ar:SeniorNotes8375PercentDue2026, us-gaap:SubsequentEvent


Debt
Period End2021-01-04
Value100.0
Percentage of DebtInstrumentRedemptionPricePercentage0.0

us-gaap:DebtInstrumentRedemptionPricePercentage us-gaap:LongtermDebtType

ar:SeniorNotes5.375PercentDue2021


Debt
Period End2020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value99.001.0001.0134-0.01344001.0269-0.01343
Percentage of DebtInstrumentRedemptionPricePercentage0.00.00.00.00.00.00.00.00.00.00.0

ar:SeniorNotes500PercentDue2025


Debt
Period End2021-06-302021-03-31
Value0102.5
Percentage of DebtInstrumentRedemptionPricePercentage0.00.0

ar:SeniorNotes5625PercentDue2023


Debt
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-30
Value101.410100.39-0.014071.028100-0.014061.042200
Percentage of DebtInstrumentRedemptionPricePercentage0.00.00.00.00.00.00.00.00.00.00.0

us-gaap:DerivativeInstrumentsNotDesignatedAsHedgingInstrumentsGainLossNet

us-gaap:DerivativeInstrumentsNotDesignatedAsHedgingInstrumentsGainLossNet


Derivative
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-31
Value-831.84-177.756196-514.751-168.015565-7.875220328-77.368-222.387575522178-65.95785438-639.805530-684.6342795451079-2.227759931308-123.766-248.929
Percentage of DerivativeInstrumentsNotDesignatedAsHedgingInstrumentsGainLossNet100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DerivativeInstrumentsNotDesignatedAsHedgingInstrumentsGainLossNet us-gaap:DerivativeInstrumentRisk, us-gaap:IncomeStatementLocation

us-gaap:CommodityContract, us-gaap:Sales


Derivative
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-30
Value-819.725-169.967201-558.979-168.015565-7.875220
Percentage of DerivativeInstrumentsNotDesignatedAsHedgingInstrumentsGainLossNet98.595.6102.5108.6100.0100.0100.0100.0

us-gaap:EmbeddedDerivativeFinancialInstruments, us-gaap:Sales


Derivative
Period End2021-06-302021-03-312020-12-312020-09-30
Value-12.115-7.789-4.87544
Percentage of DerivativeInstrumentsNotDesignatedAsHedgingInstrumentsGainLossNet1.54.4-2.5-8.6

us-gaap:EquityMethodInvestmentDividendsOrDistributions

us-gaap:EquityMethodInvestmentDividendsOrDistributions


Equity
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-30
Value314242424242484847121611107.085104.3
Percentage of EquityMethodInvestmentDividendsOrDistributions100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:EquityMethodInvestmentDividendsOrDistributions us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName, us-gaap:EquityMethodInvestmentNonconsolidatedInvestee

ar:AnteroMidstream, us-gaap:EquityMethodInvestmentNonconsolidatedInvesteeOrGroupOfInvestees


Equity
Period End2021-06-302021-03-31
Value3142
Percentage of EquityMethodInvestmentDividendsOrDistributions100.0100.0

us-gaap:EquityMethodInvestmentOtherThanTemporaryImpairment

us-gaap:EquityMethodInvestmentOtherThanTemporaryImpairment


Equity
Period End2020-12-312020-09-302020-06-302020-03-31
Value0.00.00.0610
Percentage of EquityMethodInvestmentOtherThanTemporaryImpairment0.00.00.0100.0

us-gaap:ExtinguishmentOfDebtAmount

us-gaap:ExtinguishmentOfDebtAmount


Extinguishment
Period End2020-12-312020-09-302020-06-30
Value1398461236
Percentage of ExtinguishmentOfDebtAmount100.0100.0100.0

us-gaap:ExtinguishmentOfDebtAmount us-gaap:DebtInstrument

ar:DebtRepurchasedDutchTenderOffer


Extinguishment
Period End2020-09-30
Value367
Percentage of ExtinguishmentOfDebtAmount79.6

us-gaap:FinanceLeaseInterestExpense us-gaap:IncomeStatementLocation

us-gaap:FinanceLeaseInterestExpense

us-gaap:InterestExpense


Finance
Period End2021-03-312020-03-31
Value28000.036000.0
Percentage of FinanceLeaseInterestExpense100.0100.0

us-gaap:FinanceLeasePrincipalPayments

us-gaap:FinanceLeasePrincipalPayments


Finance
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-31
Value265000.0287000.0287000.0278000.0439000.0540000.0303000.0873000.0791000.0
Percentage of FinanceLeasePrincipalPayments100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:FinanceLeaseRightOfUseAssetAmortization us-gaap:IncomeStatementLocation

us-gaap:FinanceLeaseRightOfUseAssetAmortization

ar:DepletionDepreciationAndAmortization


Finance
Period End2021-06-302021-03-312020-06-302020-03-31
Value132000.0127000.0414000.0145000.0
Percentage of FinanceLeaseRightOfUseAssetAmortization100.0100.0100.0100.0

us-gaap:GainLossOnDispositionOfAssets1

us-gaap:GainLossOnDispositionOfAssets1


Gain
Period End2021-06-302019-12-312019-09-302019-06-30
Value2.2880.00.0-0.951
Percentage of GainLossOnDispositionOfAssets1100.00.00.0100.0

us-gaap:ImpairmentOfOilAndGasProperties

us-gaap:ImpairmentOfOilAndGasProperties


Impairment
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-30
Value9.3033467293789461041130811432211345076411526115111915608.754268.5777.3034.5421.9561.3971.3643.2054.8031.5568.0512.438
Percentage of ImpairmentOfOilAndGasProperties100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ImpairmentOfOilAndGasProperties us-gaap:ConsolidationItems, us-gaap:StatementBusinessSegments

us-gaap:OperatingSegments, ar:ExplorationAndProduction


Impairment
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302017-12-312017-09-30
Value9.3033467293789461041130811432211347641
Percentage of ImpairmentOfOilAndGasProperties100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ImpairmentOfOilAndGasProperties us-gaap:StatementGeographical

ar:UticaShale


Impairment
Period End2020-09-30
Value881
Percentage of ImpairmentOfOilAndGasProperties2997.4

us-gaap:IncomeLossFromEquityMethodInvestments

us-gaap:IncomeLossFromEquityMethodInvestments


Income
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-30
Value1718202420-128.055-53.023-117.859131412109.2647.8627.3077.0333.6232.231-1.5421.5430.484
Percentage of IncomeLossFromEquityMethodInvestments100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:IncomeLossFromEquityMethodInvestments us-gaap:ConsolidationItems

us-gaap:IntersegmentElimination


Income
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-31
Value-21.515-20.744-23.233-23.173-20.947-19.077-171.814-18.478-13.6239.384
Percentage of IncomeLossFromEquityMethodInvestments-123.1-111.0-112.0-94.9-103.614.9324.015.7-100.366.6

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

us-gaap:OperatingSegments, ar:AnteroMidstream


Income
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value2120232320191618132.8812109.2647.862
Percentage of IncomeLossFromEquityMethodInvestments123.1111.0112.094.9103.6-14.9-30.8-15.7100.320.5100.0100.0100.0100.0

us-gaap:OperatingSegments, ar:ExplorationAndProduction


Income
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-31
Value1718202420-128.055-117.859131.817
Percentage of IncomeLossFromEquityMethodInvestments100.0100.0100.0100.0100.0100.0100.0100.012.9

us-gaap:IncomeLossFromEquityMethodInvestments us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName, us-gaap:EquityMethodInvestmentNonconsolidatedInvestee

ar:AnteroMidstream, us-gaap:EquityMethodInvestmentNonconsolidatedInvesteeOrGroupOfInvestees


Income
Period End2021-06-302021-03-31
Value1718
Percentage of IncomeLossFromEquityMethodInvestments100.0100.0

us-gaap:IncreaseDecreaseInAccruedLiabilities

us-gaap:IncreaseDecreaseInAccruedLiabilities


Increase
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-31
Value82-17.77922-0.235-19.593-14.59310-7.181-14.965363.38113102138-15.13519-35.63148-41.35447-16.32718-61.68472-19.32562-5.50147-17.91724-4.153247.509
Percentage of IncreaseDecreaseInAccruedLiabilities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:IncreaseDecreaseInOtherCurrentAssets

us-gaap:IncreaseDecreaseInOtherCurrentAssets


Increase
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-30
Value2962000.0-3593000.04052000.02244000.0-1372000.0583000.03390000.0-58000.0-943000.0-1364000.02096000.06074000.0-3784000.01431000.0-1081000.01451000.0-981000.03366000.02911000.0-3126000.0-1544000.0-15000.06348000.0-3080000.0560000.0-1607000.03866000.0-1917000.0
Percentage of IncreaseDecreaseInOtherCurrentAssets100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:IncreaseDecreaseInOtherCurrentLiabilities

us-gaap:IncreaseDecreaseInOtherCurrentLiabilities


Increase
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-30
Value142.249-0.029-0.014-0.4810.4353.2050.268-0.8331.952-1.174-0.807-0.352-1.493.191-1.5871.286-0.676-1.1940.577-0.445-0.0299.844-5.3460.9630.7051.1693.178
Percentage of IncreaseDecreaseInOtherCurrentLiabilities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:IncreaseDecreaseInOtherOperatingAssets

us-gaap:IncreaseDecreaseInOtherOperatingAssets


Increase
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-31
Value-1.3-0.981-0.5950.070.37-12.4350.4994.4750.988-4.3516.8090.217-1.6073.866-1.9170.8460.096-17.8419.1060.903-11.7115.77
Percentage of IncreaseDecreaseInOtherOperatingAssets100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:InducedConversionOfConvertibleDebtExpense us-gaap:LongtermDebtType, us-gaap:TypeOfArrangement

us-gaap:InducedConversionOfConvertibleDebtExpense

ar:ConvertibleSeniorNotes4.25PercentDue2026, ar:ConvertibleNoteRepurchaseWithShareOffering


Induced
Period End2021-06-302021-03-31
Value0.039
Percentage of InducedConversionOfConvertibleDebtExpense0.0100.0

ar:ConvertibleSeniorNotes4.25PercentDue2026, ar:ConvertibleNoteRepurchaseWithShareOfferingInMay


Induced
Period End2021-06-30
Value12
Percentage of InducedConversionOfConvertibleDebtExpense0.0

us-gaap:LineOfCreditFacilityUnusedCapacityCommitmentFeePercentage us-gaap:Range, us-gaap:InternalCreditAssessment, us-gaap:LongtermDebtType

us-gaap:LineOfCreditFacilityUnusedCapacityCommitmentFeePercentage

srt:Maximum, us-gaap:InternalNoninvestmentGrade, us-gaap:LineOfCredit


Line
Period End2020-09-302020-06-302020-03-312019-09-302019-06-302019-03-31
Value0.3712500.00375000.00375
Percentage of LineOfCreditFacilityUnusedCapacityCommitmentFeePercentage100.00.0100.00.00.0100.0

srt:Minimum, us-gaap:InternalNoninvestmentGrade, us-gaap:LineOfCredit


Line
Period End2020-09-302020-06-302020-03-312019-09-302019-06-302019-03-31
Value0.29700.003000.003
Percentage of LineOfCreditFacilityUnusedCapacityCommitmentFeePercentage80.00.080.00.00.080.0

us-gaap:LineOfCreditFacilityUnusedCapacityCommitmentFeePercentage us-gaap:Range, us-gaap:LongtermDebtType

srt:Maximum, us-gaap:LineOfCredit


Line
Period End2021-06-302021-03-312018-12-31
Value00.3750
Percentage of LineOfCreditFacilityUnusedCapacityCommitmentFeePercentage0.00.00.0

srt:Minimum, us-gaap:LineOfCredit


Line
Period End2021-06-302021-03-312018-12-31
Value00.30
Percentage of LineOfCreditFacilityUnusedCapacityCommitmentFeePercentage0.00.00.0

us-gaap:LossOnContractTermination

us-gaap:LossOnContractTermination


Loss
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-31
Value0.8440.0911.9731.246110.00.00.0625.6048.36
Percentage of LossOnContractTermination100.0100.0100.0100.0100.00.00.0100.0100.0100.0

us-gaap:NoncontrollingInterestIncreaseFromSubsidiaryEquityIssuance

us-gaap:NoncontrollingInterestIncreaseFromSubsidiaryEquityIssuance


Noncontrolling
Period End2021-03-312020-09-302017-12-312017-09-302017-06-302017-03-312016-12-312015-12-31
Value51510.0072.3642322345-0.269
Percentage of NoncontrollingInterestIncreaseFromSubsidiaryEquityIssuance100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:NoncontrollingInterestIncreaseFromSubsidiaryEquityIssuance us-gaap:StatementEquityComponents

us-gaap:NoncontrollingInterest


Noncontrolling
Period End2021-03-312020-09-302017-12-312017-09-302017-06-302017-03-312016-12-312015-12-31
Value51510.0072.3642322345-0.269
Percentage of NoncontrollingInterestIncreaseFromSubsidiaryEquityIssuance100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OperatingLeaseCost

us-gaap:OperatingLeaseCost


Operating
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-31
Value417408494412359355201240224198
Percentage of OperatingLeaseCost100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OperatingLeaseCost us-gaap:BalanceSheetLocation

ar:ProvedProperties


Operating
Period End2021-06-302021-03-312020-06-302020-03-31
Value28282632
Percentage of OperatingLeaseCost6.87.07.39.3

us-gaap:OperatingLeaseCost us-gaap:IncomeStatementLocation

ar:ContractTerminationAndRigStacking


Operating
Period End2021-06-302020-12-312020-09-302020-06-302019-12-312019-09-302019-06-302019-03-31
Value0.8442.1410.5465.8410.00.02.6738.019
Percentage of OperatingLeaseCost0.20.40.11.60.00.01.24.0

ar:LeaseOperating


Operating
Period End2021-06-302021-03-31
Value0.0440.022
Percentage of OperatingLeaseCost0.00.0

us-gaap:GeneralAndAdministrativeExpense


Operating
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-31
Value2.7362.4882.8912.9692.7892.8812.8332.8592.812.726
Percentage of OperatingLeaseCost0.70.60.60.70.80.81.41.21.31.4

us-gaap:NaturalGasGatheringTransportationMarketingAndProcessing


Operating
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-31
Value385376385409350352198237218187
Percentage of OperatingLeaseCost92.392.377.999.197.699.298.698.897.694.6

us-gaap:OperatingLeasePayments

us-gaap:OperatingLeasePayments


Operating
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-31
Value327388429485303358217234207150
Percentage of OperatingLeasePayments100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OperatingLeasePaymentsUse

us-gaap:OperatingLeasePaymentsUse


Operating
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-31
Value20241824352732474652
Percentage of OperatingLeasePaymentsUse100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OtherOperatingIncomeExpenseNet

us-gaap:OtherOperatingIncomeExpenseNet


Other
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-09-302016-06-302016-03-31
Value-240.501-207.872-172.392-157.185-145.458-120.286-171.785-138.276-176.294-208.224-171.027-183.658-241.482-274.673-64.759-104.136-102.427-144.429-143.712-165.108-174.355
Percentage of OtherOperatingIncomeExpenseNet100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OtherOperatingIncomeExpenseNet us-gaap:ConsolidationItems

us-gaap:IntersegmentElimination


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
Value0.9635.0614.2663.5132.7764.8784.0883.213.5040.288-104.864.023.9473.8743.8042.5563.593.5266.1053.5273.4613.396
Percentage of OtherOperatingIncomeExpenseNet-0.4-2.4-2.5-2.2-1.9-4.1-2.4-2.3-2.0-0.161.3-2.2-1.6-1.4-5.9-2.5-3.5-2.40.0-2.5-2.1-1.9

us-gaap:OtherOperatingIncomeExpenseNet us-gaap:ConsolidationItems, us-gaap:StatementBusinessSegments

us-gaap:OperatingSegments, ar:AnteroMidstream


Other
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value-0.963-5.061-4.266-3.513-2.776-4.836-4.088-3.21-3.504-1.291103-5.219-4.986-4.924
Percentage of OtherOperatingIncomeExpenseNet0.42.42.52.21.94.02.42.32.00.6-60.72.82.11.8

us-gaap:OperatingSegments, ar:ExplorationAndProduction


Other
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-30
Value-41.507-45.795-37.894-28.605-32.405-27.013-30.81-30.06-38.755-44.137-44.88-30.695-27.023-77.884-103.45-65.259-39.251-53.618-137.476-31.266-37.848-35.165-109.109-28.044
Percentage of OtherOperatingIncomeExpenseNet17.322.022.018.222.322.517.921.722.021.226.216.711.228.4159.762.738.337.10.021.822.920.20.00.0

us-gaap:OperatingSegments, ar:Marketing


Other
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-30
Value-198.994-162.077-134.498-128.58-113.053-93.273-140.975-108.216-137.539-163.084-125.131-151.764-213.42-195.739-119.983-78.884-77.421-89.993-120.822-114.611-125.977-137.933-84.861-61.799
Percentage of OtherOperatingIncomeExpenseNet82.778.078.081.877.777.582.178.378.078.373.282.688.471.3185.375.875.662.30.079.876.379.10.00.0

us-gaap:PaymentsOfDebtIssuanceCosts

us-gaap:PaymentsOfDebtIssuanceCosts


Payments
Period End2021-06-302021-03-312020-12-312019-12-312019-09-302019-06-302019-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-31
Value7.07150.077-3.7120.00.08.2599.738.9330.0320.0640.1031.9360.23215-3.973-44.559160.701-12.565
Percentage of PaymentsOfDebtIssuanceCosts100.0100.0100.0100.00.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:PaymentsOfDebtIssuanceCosts us-gaap:LongtermDebtType

ar:ConvertibleSeniorNotes4.25PercentDue2026


Payments
Period End2020-08-21
Value8.9
Percentage of PaymentsOfDebtIssuanceCosts0.0

us-gaap:PaymentsOfDividendsMinorityInterest

us-gaap:PaymentsOfDividendsMinorityInterest


Payments
Period End2021-06-302021-03-312020-12-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-31
Value2124180.00.00.085786963555040342723191714128.7418.2794.338
Percentage of PaymentsOfDividendsMinorityInterest100.0100.0100.00.00.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:PaymentsRelatedToTaxWithholdingForShareBasedCompensation

us-gaap:PaymentsRelatedToTaxWithholdingForShareBasedCompensation


Payments
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-31
Value3.8855.6450.0490.0420.2990.0320.010.0841.8160.4798.8150.2386.8831.084150.0676.7761.657220.0574.7020.1174.8770.0414.4670.046
Percentage of PaymentsRelatedToTaxWithholdingForShareBasedCompensation100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:PaymentsToAcquireOilAndGasProperty

us-gaap:PaymentsToAcquireOilAndGasProperty


Payments
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-31
Value1414139.464111018122927424238492252745552501292828388051259279179609771122148258
Percentage of PaymentsToAcquireOilAndGasProperty100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:PaymentsToAcquireOtherPropertyPlantAndEquipment

us-gaap:PaymentsToAcquireOtherPropertyPlantAndEquipment


Payments
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-31
Value-1.0163.3361.6170.1120.4630.7710.721.3511.5013.1282.1431.8690.9312.5712.714.8535.9740.590.9470.4510.7550.5411.372.4310.6912.1030.6791.4983.2587.7833.0151.4591.0450.7210.661
Percentage of PaymentsToAcquireOtherPropertyPlantAndEquipment100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:PaymentsToExploreAndDevelopOilAndGasProperties

us-gaap:PaymentsToExploreAndDevelopOilAndGasProperties


Payments
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-31
Value168105132141251300296277311368362372392359335317322306317299314395300341440569753620606496348546385334217
Percentage of PaymentsToExploreAndDevelopOilAndGasProperties100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ProceedsFromConvertibleDebt

us-gaap:ProceedsFromConvertibleDebt


Proceeds
Period End2020-12-31
Value0.0
Percentage of ProceedsFromConvertibleDebt0.0

us-gaap:ProceedsFromConvertibleDebt us-gaap:LongtermDebtType

ar:ConvertibleSeniorNotes4.25PercentDue2026


Proceeds
Period End2020-08-21
Value278
Percentage of ProceedsFromConvertibleDebt0.0

us-gaap:ProceedsFromIssuanceOfUnsecuredDebt

us-gaap:ProceedsFromIssuanceOfUnsecuredDebt


Proceeds
Period End2021-06-302021-03-312019-12-312019-09-302019-06-302019-03-312016-12-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302013-12-312013-09-30
Value60012000.00.00.06506000.00.00.07500.050210000.0
Percentage of ProceedsFromIssuanceOfUnsecuredDebt100.0100.00.00.00.0100.0100.00.00.00.0100.00.0100.0100.00.0

us-gaap:ProceedsFromIssuanceOrSaleOfEquity us-gaap:LongtermDebtType, us-gaap:SubsequentEventType, us-gaap:TypeOfArrangement

us-gaap:ProceedsFromIssuanceOrSaleOfEquity

ar:ConvertibleSeniorNotes4.25PercentDue2026, us-gaap:SubsequentEvent, ar:ConvertibleNoteRepurchaseWithShareOffering


Proceeds
Period End2021-01-12
Value63
Percentage of ProceedsFromIssuanceOrSaleOfEquity100.0

us-gaap:ProceedsFromIssuanceOrSaleOfEquity us-gaap:LongtermDebtType, us-gaap:TypeOfArrangement

ar:ConvertibleSeniorNotes4.25PercentDue2026, ar:ConvertibleNoteRepurchaseWithShareOffering


Proceeds
Period End2021-01-12
Value63
Percentage of ProceedsFromIssuanceOrSaleOfEquity100.0

ar:ConvertibleSeniorNotes4.25PercentDue2026, ar:ConvertibleNoteRepurchaseWithShareOfferingInMay


Proceeds
Period End2021-05-13
Value26
Percentage of ProceedsFromIssuanceOrSaleOfEquity0.0

us-gaap:ProceedsFromLegalSettlements us-gaap:LitigationCase, us-gaap:LitigationStatus

us-gaap:ProceedsFromLegalSettlements

ar:WashingtonGasLightCompany, us-gaap:JudicialRuling


Proceeds
Period End2021-01-31
Value107
Percentage of ProceedsFromLegalSettlements100.0

ar:WashingtonGasLightCompany, us-gaap:SettledLitigation


Proceeds
Period End2021-02-28
Value107
Percentage of ProceedsFromLegalSettlements0.0

us-gaap:ProceedsFromMinorityShareholders

us-gaap:ProceedsFromMinorityShareholders


Proceeds
Period End2020-12-312020-09-302017-12-312017-09-302017-06-302017-03-312016-12-312015-12-312015-09-302015-06-302015-03-31
Value510.00.0072.3642322345-0.269-296.721-0.182537
Percentage of ProceedsFromMinorityShareholders100.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ProceedsFromPaymentsForOtherFinancingActivities

us-gaap:ProceedsFromPaymentsForOtherFinancingActivities


Proceeds
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312012-12-31
Value-244000.0-265000.0-287000.0-287000.0-278000.0-439000.0-539000.0-661000.0-519000.0-841000.0-1019000.0-1084000.0-1167000.0-1269000.0-1070000.0-1166000.0-1358000.0-1389000.0-1454000.0-1295000.0-1290000.0-1282000.0-1280000.0-1229000.0-1171000.0-1161000.0-184000.0
Percentage of ProceedsFromPaymentsForOtherFinancingActivities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ProceedsFromRepaymentsOfLinesOfCredit

us-gaap:ProceedsFromRepaymentsOfLinesOfCredit


Proceeds
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-31
Value-143.2-873.8190-99.044330277100125-270.0-21.62119741075288-783.051570-125.0-125.0-460.033302-93.0328-940.0225265495457-1224.5552556187-230.0
Percentage of ProceedsFromRepaymentsOfLinesOfCredit100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ProfessionalFees

us-gaap:ProfessionalFees


Professional
Period End2021-06-302021-03-312020-12-312020-09-302020-06-30
Value185000.02291000.0582000.0524000.06138000.0
Percentage of ProfessionalFees100.0100.0100.0100.0100.0

us-gaap:RepaymentsOfUnsecuredDebt

us-gaap:RepaymentsOfUnsecuredDebt


Repayments
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-31
Value574660319403195300
Percentage of RepaymentsOfUnsecuredDebt100.0100.0100.0100.0100.0100.0

us-gaap:RightOfUseAssetObtainedInExchangeForOperatingLeaseLiability

us-gaap:RightOfUseAssetObtainedInExchangeForOperatingLeaseLiability


Right
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-31
Value6.8210.02823641049.3823750.00.03345
Percentage of RightOfUseAssetObtainedInExchangeForOperatingLeaseLiability100.0100.0100.0100.0100.0100.0100.00.00.0100.0

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeituresWeightedAverageGrantDateFairValue us-gaap:AwardType

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeituresWeightedAverageGrantDateFairValue

ar:RestrictedStockAndRestrictedStockUnit


Share
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-312017-09-302017-06-302017-03-312016-09-302016-06-302016-03-312015-09-302015-06-302015-03-31
Value0.014.82-0.55-0.07-0.5413.07-1.49-5.5723.620.16-4.4430.193.14-1.9125.87-0.98-0.5628.240.072.4637.52
Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeituresWeightedAverageGrantDateFairValue100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:PerformanceShares


Share
Period End2021-06-302021-03-312020-12-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302016-12-312016-09-30
Value-6.299.260-7.23-6.115.4727.250.04-2.30.3229.83-0.12000
Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeituresWeightedAverageGrantDateFairValue-62900.0192.1-0.00.0410.1-98.2115.40.0-1437.5-7.298.80.00.00.0-0.0

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue us-gaap:AwardType

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue

ar:RestrictedStockAndRestrictedStockUnit


Share
Period End2021-06-302021-03-312020-12-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-312017-09-302017-06-302017-03-312016-09-302016-06-302016-03-312015-09-30
Value2.247.260.18-0.09-2.2510.940.110.7619.87-0.02-3.3925.62-0.01-0.4627.52-0.13
Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:PerformanceShares


Share
Period End2020-12-312019-12-312019-09-302018-12-312018-09-302017-12-312017-09-302016-12-312016-09-302016-06-302016-03-31
Value0000000003.5526.22
Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue0.00.0-0.00.00.00.0-0.00.0-0.0-771.795.3

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodWeightedAverageGrantDateFairValue dei:LegalEntity, us-gaap:AwardType

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodWeightedAverageGrantDateFairValue

ar:AnteroMidstream, us-gaap:RestrictedStockUnitsRSU


Share
Period End2021-06-302021-03-31
Value-0.2515.81
Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodWeightedAverageGrantDateFairValue100.0100.0

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodWeightedAverageGrantDateFairValue us-gaap:AwardType

ar:RestrictedStockAndRestrictedStockUnit


Share
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-312017-09-302017-06-302017-03-312016-09-30
Value1.882.73.12-1.08.465.04-0.341.1626.88-0.3511.2328.42-0.8615.6128.71-0.11
Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodWeightedAverageGrantDateFairValue-752.017.10.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedVolatilityRate us-gaap:AwardType

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedVolatilityRate

us-gaap:PerformanceShares


Share
Period End2020-12-312019-12-312018-12-312016-03-31
Value035.6440.590.46
Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedVolatilityRate0.0100.0100.0100.0

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsRiskFreeInterestRate us-gaap:AwardType

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsRiskFreeInterestRate

us-gaap:PerformanceShares


Share
Period End2020-12-312019-12-312018-12-312016-03-31
Value02.32652.46510.0116
Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsRiskFreeInterestRate0.0100.0100.0100.0

us-gaap:ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsExpirationsInPeriodWeightedAverageExercisePrice us-gaap:AwardType

us-gaap:ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsExpirationsInPeriodWeightedAverageExercisePrice

us-gaap:EmployeeStockOption


Share
Period End2021-06-302021-03-312020-12-31
Value050.00
Percentage of ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsExpirationsInPeriodWeightedAverageExercisePrice0.0100.00.0

us-gaap:ShortTermLeaseCost

us-gaap:ShortTermLeaseCost


Short
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-31
Value24161416296347413935
Percentage of ShortTermLeaseCost100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:StockIssuedDuringPeriodSharesNewIssues

us-gaap:StockIssuedDuringPeriodSharesNewIssues


Stock
Period End2021-01-122016-06-152015-03-31
Value312614
Percentage of StockIssuedDuringPeriodSharesNewIssues100.0100.0100.0

us-gaap:StockIssuedDuringPeriodSharesNewIssues us-gaap:LongtermDebtType

ar:ConvertibleSeniorNotes4.25PercentDue2026


Stock
Period End2021-05-132021-01-12
Value1131
Percentage of StockIssuedDuringPeriodSharesNewIssues0.0100.0

us-gaap:StockIssuedDuringPeriodSharesNewIssues us-gaap:LongtermDebtType, us-gaap:SubsequentEventType

ar:ConvertibleSeniorNotes4.25PercentDue2026, us-gaap:SubsequentEvent


Stock
Period End2021-01-12
Value31
Percentage of StockIssuedDuringPeriodSharesNewIssues100.0

us-gaap:StockIssuedDuringPeriodSharesShareBasedCompensation us-gaap:StatementEquityComponents

us-gaap:StockIssuedDuringPeriodSharesShareBasedCompensation

us-gaap:CommonStock


Stock
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
Value159000.0464000.0178000.099000.0382000.0147000.034.0528.0145.022.0442.0129.0
Percentage of StockIssuedDuringPeriodSharesShareBasedCompensation100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:StockIssuedDuringPeriodValueShareBasedCompensation

us-gaap:StockIssuedDuringPeriodValueShareBasedCompensation


Stock
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-30
Value-3885000.0-5645000.0-41000.0-300000.0-32000.0-85000.0-1815000.0-450000.0-157000.0-5583000.0-1066000.0-10661000.0-67000.0-5844000.0-1657000.0-16401000.0-57000.0-4685000.0-117000.0-71000.0-41000.0
Percentage of StockIssuedDuringPeriodValueShareBasedCompensation100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:StockIssuedDuringPeriodValueShareBasedCompensation us-gaap:StatementEquityComponents

us-gaap:AdditionalPaidInCapital


Stock
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-30
Value-3893000.0-5656000.0-42000.0-305000.0-34000.0-86000.0-1819000.0-451000.0-157000.0-5589000.0-1067000.0-10670000.0-68000.0-5848000.0-1658000.0-16411000.0-57000.0-4688000.0-118000.0-71000.0-41000.0
Percentage of StockIssuedDuringPeriodValueShareBasedCompensation100.2100.2102.4101.7106.2101.2100.2100.2100.0100.1100.1100.1101.5100.1100.1100.1100.0100.1100.9100.0100.0

us-gaap:CommonStock


Stock
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-30
Value8000.011000.01000.05000.02000.01000.04000.01000.06000.01000.09000.01000.04000.01000.010000.003000.01000.000
Percentage of StockIssuedDuringPeriodValueShareBasedCompensation-0.2-0.2-2.4-1.7-6.2-1.2-0.2-0.2-0.1-0.1-0.1-1.5-0.1-0.1-0.1-0.0-0.1-0.9-0.0-0.0

us-gaap:TaxesExcludingIncomeAndExciseTaxes

us-gaap:TaxesExcludingIncomeAndExciseTaxes


Taxes
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-31
Value3344352519252928303544302525242222241415171920102224232121211911108.619
Percentage of TaxesExcludingIncomeAndExciseTaxes100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

ar:AccruedCapitalExpendituresCurrent

ar:AccruedCapitalExpendituresCurrent


Accrued
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312015-12-31
Value434432464785105836263113143126123155162173162159271
Percentage of AccruedCapitalExpendituresCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

ar:AccruedGatheringCompressionProcessingAndTransportationExpensesCurrent

ar:AccruedGatheringCompressionProcessingAndTransportationExpensesCurrent


Accrued
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312015-12-31
Value1501491521581591541341411471401481129594888483827559
Percentage of AccruedGatheringCompressionProcessingAndTransportationExpensesCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

ar:AccruedProductionAndAdValoremTaxes

ar:AccruedProductionAndAdValoremTaxes


Accrued
Period End2021-06-302020-12-31
Value3437
Percentage of AccruedProductionAndAdValoremTaxes100.0100.0

ar:CashAwardsAccrued us-gaap:AwardType

ar:CashAwardsAccrued

ar:CashAwards


Cash
Period End2021-06-302021-03-312020-12-312020-09-30
Value2200000.02400000.03200000.02200000.0
Percentage of CashAwardsAccrued100.0100.0100.0100.0

ar:DebtConversionIfConvertedValue us-gaap:LongtermDebtType

ar:DebtConversionIfConvertedValue

ar:ConvertibleSeniorNotes4.25PercentDue2026


Debt
Period End2021-06-302021-03-312020-12-31
Value283323361
Percentage of DebtConversionIfConvertedValue100.0100.0100.0

ar:DebtConversionIfConvertedValueAboveBelowPrincipalAmount us-gaap:LongtermDebtType

ar:DebtConversionIfConvertedValueAboveBelowPrincipalAmount

ar:ConvertibleSeniorNotes4.25PercentDue2026


Debt
Period End2021-06-302021-03-312020-12-31
Value20118573
Percentage of DebtConversionIfConvertedValueAboveBelowPrincipalAmount100.0100.0100.0

ar:DebtInstrumentIssuePriceAsPercentageOfFaceValue us-gaap:LongtermDebtType, us-gaap:SubsequentEventType

ar:DebtInstrumentIssuePriceAsPercentageOfFaceValue

ar:SeniorNotes7625PercentDue2029, us-gaap:SubsequentEvent


Debt
Period End2021-01-26
Value1.0
Percentage of DebtInstrumentIssuePriceAsPercentageOfFaceValue100.0

ar:DebtInstrumentRedemptionAmount us-gaap:LongtermDebtType, us-gaap:SubsequentEventType

ar:DebtInstrumentRedemptionAmount

ar:SeniorNotesDue2026, us-gaap:SubsequentEvent


Debt
Period End2021-07-01
Value175
Percentage of DebtInstrumentRedemptionAmount100.0

ar:DeferredTaxAssetsInvestmentInAnteroMidstreamPartnersLp

ar:DeferredTaxAssetsInvestmentInAnteroMidstreamPartnersLp


Deferred
Period End2020-12-312019-12-312017-12-312016-12-31
Value3301723813
Percentage of DeferredTaxAssetsInvestmentInAnteroMidstreamPartnersLp100.0100.0100.0100.0

ar:DeferredTaxLiabilitiesInvestmentInMartica

ar:DeferredTaxLiabilitiesInvestmentInMartica


Deferred
Period End2020-12-31
Value59
Percentage of DeferredTaxLiabilitiesInvestmentInMartica100.0

ar:DeferredTaxLiabilitiesPropertyPlantAndEquipmentOilAndGasProperty

ar:DeferredTaxLiabilitiesPropertyPlantAndEquipmentOilAndGasProperty


Deferred
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-31
Value1188128410551058866708600458
Percentage of DeferredTaxLiabilitiesPropertyPlantAndEquipmentOilAndGasProperty100.0100.0100.0100.0100.0100.0100.0100.0

ar:DeferredTaxLiabilityConvertibleNotes

ar:DeferredTaxLiabilityConvertibleNotes


Deferred
Period End2020-12-31
Value26
Percentage of DeferredTaxLiabilityConvertibleNotes100.0

ar:DerivativeSettlementLiabilitiesPayableCurrent

ar:DerivativeSettlementLiabilitiesPayableCurrent


Derivative
Period End2021-06-302020-12-31
Value293.425
Percentage of DerivativeSettlementLiabilitiesPayableCurrent100.0100.0

ar:DiscountedFutureNetCashFlowsRelatingToProvedOilAndGasReservesFutureNetCashFlowsBeforeIncomeTaxExpense

ar:DiscountedFutureNetCashFlowsRelatingToProvedOilAndGasReservesFutureNetCashFlowsBeforeIncomeTaxExpense


Discounted
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-31
Value3.958143026111233698187977221
Percentage of DiscountedFutureNetCashFlowsRelatingToProvedOilAndGasReservesFutureNetCashFlowsBeforeIncomeTaxExpense100.0100.0100.0100.0100.0100.0100.0100.0100.0

ar:FinanceLeasesAccumulatedAmortization

ar:FinanceLeasesAccumulatedAmortization


Finance
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-31
Value3.03.03.03.03.03.09.09.09.09.0
Percentage of FinanceLeasesAccumulatedAmortization100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

ar:FinanceLeasesAccumulatedAmortization us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName, us-gaap:UnderlyingAssetClass

ar:AnteroMidstream, ar:GasGatheringLinesAndCompressorStations


Finance
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-30
Value11009001100110013001400
Percentage of FinanceLeasesAccumulatedAmortization36666.730000.036666.712222.214444.415555.6

ar:LesseeOperatingAndFinanceLeaseLiabilityPaymentsDue

ar:LesseeOperatingAndFinanceLeaseLiabilityPaymentsDue


Lessee
Period End2021-06-302021-03-312020-12-312020-09-30
Value4079423143854521
Percentage of LesseeOperatingAndFinanceLeaseLiabilityPaymentsDue100.0100.0100.0100.0

ar:LesseeOperatingAndFinanceLeaseLiabilityPaymentsDueAfterYearFive

ar:LesseeOperatingAndFinanceLeaseLiabilityPaymentsDueAfterYearFive


Lessee
Period End2021-06-302021-03-312020-12-312020-09-30
Value1115111515581558
Percentage of LesseeOperatingAndFinanceLeaseLiabilityPaymentsDueAfterYearFive100.0100.0100.0100.0

ar:LesseeOperatingAndFinanceLeaseLiabilityPaymentsDueNextTwelve

ar:LesseeOperatingAndFinanceLeaseLiabilityPaymentsDueNextTwelve


Lessee
Period End2021-06-302021-03-312020-12-312020-09-30
Value580579611591
Percentage of LesseeOperatingAndFinanceLeaseLiabilityPaymentsDueNextTwelve100.0100.0100.0100.0

ar:LesseeOperatingAndFinanceLeaseLiabilityPaymentsDueYearFive

ar:LesseeOperatingAndFinanceLeaseLiabilityPaymentsDueYearFive


Lessee
Period End2021-06-302021-03-312020-12-312020-09-30
Value442442493493
Percentage of LesseeOperatingAndFinanceLeaseLiabilityPaymentsDueYearFive100.0100.0100.0100.0

ar:LesseeOperatingAndFinanceLeaseLiabilityPaymentsDueYearFour

ar:LesseeOperatingAndFinanceLeaseLiabilityPaymentsDueYearFour


Lessee
Period End2021-06-302021-03-312020-12-312020-09-30
Value493493566566
Percentage of LesseeOperatingAndFinanceLeaseLiabilityPaymentsDueYearFour100.0100.0100.0100.0

ar:LesseeOperatingAndFinanceLeaseLiabilityPaymentsDueYearThree

ar:LesseeOperatingAndFinanceLeaseLiabilityPaymentsDueYearThree


Lessee
Period End2021-06-302021-03-312020-12-312020-09-30
Value565566575575
Percentage of LesseeOperatingAndFinanceLeaseLiabilityPaymentsDueYearThree100.0100.0100.0100.0

ar:LesseeOperatingAndFinanceLeaseLiabilityPaymentsDueYearTwo

ar:LesseeOperatingAndFinanceLeaseLiabilityPaymentsDueYearTwo


Lessee
Period End2021-06-302021-03-312020-12-312020-09-30
Value574575579578
Percentage of LesseeOperatingAndFinanceLeaseLiabilityPaymentsDueYearTwo100.0100.0100.0100.0

ar:LesseeOperatingAndFinanceLeaseLiabilityPaymentsRemainderOfFiscalYear

ar:LesseeOperatingAndFinanceLeaseLiabilityPaymentsRemainderOfFiscalYear


Lessee
Period End2021-06-302021-03-312020-09-30
Value307457157
Percentage of LesseeOperatingAndFinanceLeaseLiabilityPaymentsRemainderOfFiscalYear100.0100.0100.0

ar:LesseeOperatingAndFinanceLeaseLiabilityUndiscountedExcessAmount

ar:LesseeOperatingAndFinanceLeaseLiabilityUndiscountedExcessAmount


Lessee
Period End2021-06-302021-03-312020-12-312020-09-30
Value1592168017701859
Percentage of LesseeOperatingAndFinanceLeaseLiabilityUndiscountedExcessAmount100.0100.0100.0100.0

ar:LineOfCreditFacilityBorrowingBase us-gaap:LongtermDebtType

ar:LineOfCreditFacilityBorrowingBase

us-gaap:LineOfCredit


Line
Period End2021-06-302021-03-312020-12-312020-09-302017-09-302016-09-302016-03-312015-09-302014-12-312014-09-30
Value2850285028502850475045004500400040003000
Percentage of LineOfCreditFacilityBorrowingBase100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

ar:OperatingAndFinanceLeaseLiability

ar:OperatingAndFinanceLeaseLiability


Operating
Period End2021-06-302021-03-312020-12-312020-09-30
Value2486255026142661
Percentage of OperatingAndFinanceLeaseLiability100.0100.0100.0100.0

ar:OperatingAndFinanceLeaseLiabilityCurrent

ar:OperatingAndFinanceLeaseLiabilityCurrent


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
Value2692652662512302953054094134132.459
Percentage of OperatingAndFinanceLeaseLiabilityCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

ar:OperatingAndFinanceLeaseLiabilityNoncurrent

ar:OperatingAndFinanceLeaseLiabilityNoncurrent


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
Value22172284234824102334252025832823292030242.873
Percentage of OperatingAndFinanceLeaseLiabilityNoncurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

ar:OverridingRoyaltyInterestAsProductionVolumeFromMiningPropertiesThresholdOne us-gaap:CounterpartyName

ar:OverridingRoyaltyInterestAsProductionVolumeFromMiningPropertiesThresholdOne

ar:J.p.MorganVenturesEnergyCorporation


Overriding
Period End2020-07-01
Value136
Percentage of OverridingRoyaltyInterestAsProductionVolumeFromMiningPropertiesThresholdOne100.0

ar:ReceivablesFromContractsWithCustomers

ar:ReceivablesFromContractsWithCustomers


Receivables
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
Value4934474253392552013182813090.365475354321280300
Percentage of ReceivablesFromContractsWithCustomers100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

ar:RevenueDistributionsPayableCurrent

ar:RevenueDistributionsPayableCurrent


Revenue
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302013-12-31
Value26728219814817317420723130130131024521123720922020319816317213513212916119018318216996
Percentage of RevenueDistributionsPayableCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

ar:ShareBasedCompensationArrangementByShareBasedPaymentAwardWeightedAverageFairValueAbsoluteTsr us-gaap:AwardType

ar:ShareBasedCompensationArrangementByShareBasedPaymentAwardWeightedAverageFairValueAbsoluteTsr

us-gaap:PerformanceShares


Share
Period End2021-06-302020-12-312020-09-302019-12-312018-12-31
Value11.992.632.639.2624.85
Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardWeightedAverageFairValueAbsoluteTsr100.0100.0100.0100.0100.0

ar:WeightedAverageHedgedDifferential ar:DerivativeContractTerm, ar:Indices, us-gaap:Energy

ar:WeightedAverageHedgedDifferential

ar:JanuaryDecember2022, ar:NymexToTco, ar:NaturalGas


Weighted
Period End2021-06-30
Value0.515
Percentage of WeightedAverageHedgedDifferential100.0

ar:JanuaryDecember2023, ar:NymexToTco, ar:NaturalGas


Weighted
Period End2021-06-30
Value0.525
Percentage of WeightedAverageHedgedDifferential101.9

ar:JanuaryDecember2024, ar:NymexToTco, ar:NaturalGas


Weighted
Period End2021-06-30
Value0.53
Percentage of WeightedAverageHedgedDifferential102.9

ar:JulyDecember2021, ar:NymexToTco, ar:NaturalGas


Weighted
Period End2021-06-30
Value0.414
Percentage of WeightedAverageHedgedDifferential80.4

ar:WeightedAveragePayoutRatio ar:DerivativeContractTerm, ar:Indices

ar:WeightedAveragePayoutRatio

ar:YearEndingDecember312021, ar:MontBelvieuNaturalGasolineToNymexWti


Weighted
Period End2020-09-30
Value0
Percentage of WeightedAveragePayoutRatio0.0

ar:YearEndingDecember312021, ar:NymexToTco


Weighted
Period End2020-09-30
Value0
Percentage of WeightedAveragePayoutRatio0.0

ar:YearEndingDecember312022, ar:NymexToTco


Weighted
Period End2020-09-30
Value0
Percentage of WeightedAveragePayoutRatio0.0

ar:YearEndingDecember312023, ar:NymexToTco


Weighted
Period End2020-09-30
Value0
Percentage of WeightedAveragePayoutRatio0.0

ar:YearEndingDecember312024, ar:NymexToTco


Weighted
Period End2020-09-30
Value0
Percentage of WeightedAveragePayoutRatio0.0

ar:WeightedAveragePayoutRatio ar:DerivativeContractTerm, ar:Indices, us-gaap:Energy

ar:AprilDecember2021, ar:NymexToTco, ar:NaturalGas


Weighted
Period End2021-03-31
Value0.414
Percentage of WeightedAveragePayoutRatio0.0

ar:JanuaryDecember2022, ar:NymexToTco, ar:NaturalGas


Weighted
Period End2021-03-31
Value0.515
Percentage of WeightedAveragePayoutRatio0.0

ar:JanuaryDecember2023, ar:NymexToTco, ar:NaturalGas


Weighted
Period End2021-03-31
Value0.525
Percentage of WeightedAveragePayoutRatio0.0

ar:JanuaryDecember2024, ar:NymexToTco, ar:NaturalGas


Weighted
Period End2021-03-31
Value0.53
Percentage of WeightedAveragePayoutRatio0.0

ar:WeightedAveragePayoutRatio ar:DerivativeContractTerm, ar:Indices, us-gaap:Energy, us-gaap:FinancialInstrument

ar:AprilDecember2021, ar:MontBelvieuNaturalGasolineToWti, ar:NaturalGasLiquids, us-gaap:Swap


Weighted
Period End2021-03-31
Value78.0
Percentage of WeightedAveragePayoutRatio0.0

ar:JulyDecember2021, ar:MontBelvieuNaturalGasolineToWti, ar:NaturalGasLiquids, us-gaap:Swap


Weighted
Period End2021-06-30
Value78.0
Percentage of WeightedAveragePayoutRatio0.0

srt:FutureNetCashFlowsRelatingToProvedOilAndGasReservesCashInflows

srt:FutureNetCashFlowsRelatingToProvedOilAndGasReservesCashInflows


Future
Period End2020-12-312019-12-312018-12-312017-12-312016-12-31
Value3754645536
Percentage of FutureNetCashFlowsRelatingToProvedOilAndGasReservesCashInflows100.0100.0100.0100.0100.0

srt:FutureNetCashFlowsRelatingToProvedOilAndGasReservesDevelopmentCosts

srt:FutureNetCashFlowsRelatingToProvedOilAndGasReservesDevelopmentCosts


Future
Period End2020-12-312019-12-312018-12-312017-12-312016-12-31
Value1685000.02772000.03453000.03312000.03902000.0
Percentage of FutureNetCashFlowsRelatingToProvedOilAndGasReservesDevelopmentCosts100.0100.0100.0100.0100.0

srt:FutureNetCashFlowsRelatingToProvedOilAndGasReservesNetCashFlows

srt:FutureNetCashFlowsRelatingToProvedOilAndGasReservesNetCashFlows


Future
Period End2020-12-312019-12-312018-12-312017-12-312016-12-31
Value3.95813252210
Percentage of FutureNetCashFlowsRelatingToProvedOilAndGasReservesNetCashFlows100.0100.0100.0100.0100.0

srt:FutureNetCashFlowsRelatingToProvedOilAndGasReservesProductionCosts

srt:FutureNetCashFlowsRelatingToProvedOilAndGasReservesProductionCosts


Future
Period End2020-12-312019-12-312018-12-312017-12-312016-12-31
Value3236302621
Percentage of FutureNetCashFlowsRelatingToProvedOilAndGasReservesProductionCosts100.0100.0100.0100.0100.0

srt:FutureNetCashFlowsRelatingToProvedOilAndGasReservesTenPercentAnnualDiscountForEstimatedTimingOfCashFlows

srt:FutureNetCashFlowsRelatingToProvedOilAndGasReservesTenPercentAnnualDiscountForEstimatedTimingOfCashFlows


Future
Period End2020-12-312019-12-312018-12-312017-12-312016-12-31
Value2.7487.82414137.294
Percentage of FutureNetCashFlowsRelatingToProvedOilAndGasReservesTenPercentAnnualDiscountForEstimatedTimingOfCashFlows100.0100.0100.0100.0100.0

srt:ProvedDevelopedAndUndevelopedReserveNetEnergy

srt:ProvedDevelopedAndUndevelopedReserveNetEnergy


Proved
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-31
Value171818171513
Percentage of ProvedDevelopedAndUndevelopedReserveNetEnergy100.0100.0100.0100.0100.0100.0

srt:ProvedDevelopedAndUndevelopedReserveNetEnergy us-gaap:ConsolidatedEntities

us-gaap:VariableInterestEntityPrimaryBeneficiary


Proved
Period End2020-12-31
Value0.254
Percentage of ProvedDevelopedAndUndevelopedReserveNetEnergy1.4

srt:ProvedDevelopedAndUndevelopedReservesNet us-gaap:ConsolidatedEntities, us-gaap:ReserveQuantitiesByTypeOfReserve

srt:ProvedDevelopedAndUndevelopedReservesNet

us-gaap:VariableInterestEntityPrimaryBeneficiary, srt:NaturalGasLiquidsReserves


Proved
Period End2020-12-31
Value15.0
Percentage of ProvedDevelopedAndUndevelopedReservesNet100.0

us-gaap:VariableInterestEntityPrimaryBeneficiary, srt:NaturalGasReserves


Proved
Period End2020-12-31
Value159.0
Percentage of ProvedDevelopedAndUndevelopedReservesNet1060.0

us-gaap:VariableInterestEntityPrimaryBeneficiary, srt:OilReserves


Proved
Period End2020-12-31
Value0.5
Percentage of ProvedDevelopedAndUndevelopedReservesNet3.3

srt:ProvedDevelopedAndUndevelopedReservesNet us-gaap:ReserveQuantitiesByTypeOfReserve

srt:NaturalGasLiquidsReserves


Proved
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-31
Value1236.01191.01052.0989.0957.0587.0
Percentage of ProvedDevelopedAndUndevelopedReservesNet8240.00.00.00.00.00.0

srt:NaturalGasReserves


Proved
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-31
Value10025.011494.011425.011098.09414.09533.0
Percentage of ProvedDevelopedAndUndevelopedReservesNet66833.30.00.00.00.00.0

srt:OilReserves


Proved
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-31
Value33.042.046.038.038.026.0
Percentage of ProvedDevelopedAndUndevelopedReservesNet220.00.00.00.00.00.0

srt:ProvedDevelopedReservesBOE1

srt:ProvedDevelopedReservesBOE1


Proved
Period End2020-12-312019-12-312018-12-312017-12-312016-12-31
Value11873.011740.010389.08488.06914.0
Percentage of ProvedDevelopedReservesBOE1100.0100.0100.0100.0100.0

srt:ProvedDevelopedReservesBOE1 us-gaap:ConsolidatedEntities, us-gaap:ReserveQuantitiesByTypeOfReserve

us-gaap:VariableInterestEntityPrimaryBeneficiary, srt:NaturalGasLiquidsReserves


Proved
Period End2020-12-31
Value11.0
Percentage of ProvedDevelopedReservesBOE10.1

us-gaap:VariableInterestEntityPrimaryBeneficiary, srt:NaturalGasReserves


Proved
Period End2020-12-31
Value110.0
Percentage of ProvedDevelopedReservesBOE10.9

us-gaap:VariableInterestEntityPrimaryBeneficiary, srt:OilReserves


Proved
Period End2020-12-31
Value0.3
Percentage of ProvedDevelopedReservesBOE10.0

srt:ProvedDevelopedReservesVolume us-gaap:ConsolidatedEntities

srt:ProvedDevelopedReservesVolume

us-gaap:VariableInterestEntityPrimaryBeneficiary


Proved
Period End2020-12-31
Value181.0
Percentage of ProvedDevelopedReservesVolume100.0

srt:ProvedDevelopedReservesVolume us-gaap:ReserveQuantitiesByTypeOfReserve

srt:NaturalGasLiquidsReserves


Proved
Period End2020-12-312019-12-312018-12-312017-12-312016-12-31
Value810.0731.0600.0467.0401.0
Percentage of ProvedDevelopedReservesVolume447.50.00.00.00.0

srt:NaturalGasReserves


Proved
Period End2020-12-312019-12-312018-12-312017-12-312016-12-31
Value6901.07229.06669.05587.04426.0
Percentage of ProvedDevelopedReservesVolume3812.70.00.00.00.0

srt:OilReserves


Proved
Period End2020-12-312019-12-312018-12-312017-12-312016-12-31
Value19.021.020.016.013.0
Percentage of ProvedDevelopedReservesVolume10.50.00.00.00.0

srt:ProvedUndevelopedReserveBOE1

srt:ProvedUndevelopedReserveBOE1


Proved
Period End2020-12-312019-12-312018-12-312017-12-312016-12-31
Value5762.07153.07622.08773.08472.0
Percentage of ProvedUndevelopedReserveBOE1100.0100.0100.0100.0100.0

srt:ProvedUndevelopedReserveBOE1 us-gaap:ConsolidatedEntities, us-gaap:ReserveQuantitiesByTypeOfReserve

us-gaap:VariableInterestEntityPrimaryBeneficiary, srt:NaturalGasLiquidsReserves


Proved
Period End2020-12-31
Value4.0
Percentage of ProvedUndevelopedReserveBOE10.1

us-gaap:VariableInterestEntityPrimaryBeneficiary, srt:NaturalGasReserves


Proved
Period End2020-12-31
Value49.0
Percentage of ProvedUndevelopedReserveBOE10.9

us-gaap:VariableInterestEntityPrimaryBeneficiary, srt:OilReserves


Proved
Period End2020-12-31
Value0.2
Percentage of ProvedUndevelopedReserveBOE10.0

srt:ProvedUndevelopedReserveVolume us-gaap:ConsolidatedEntities

srt:ProvedUndevelopedReserveVolume

us-gaap:VariableInterestEntityPrimaryBeneficiary


Proved
Period End2020-12-31
Value73.0
Percentage of ProvedUndevelopedReserveVolume100.0

srt:ProvedUndevelopedReserveVolume us-gaap:ReserveQuantitiesByTypeOfReserve

srt:NaturalGasLiquidsReserves


Proved
Period End2020-12-312019-12-312018-12-312017-12-312016-12-31
Value426.0460.0452.0522.0556.0
Percentage of ProvedUndevelopedReserveVolume583.60.00.00.00.0

srt:NaturalGasReserves


Proved
Period End2020-12-312019-12-312018-12-312017-12-312016-12-31
Value3124.04265.04756.05511.04988.0
Percentage of ProvedUndevelopedReserveVolume4279.50.00.00.00.0

srt:OilReserves


Proved
Period End2020-12-312019-12-312018-12-312017-12-312016-12-31
Value14.021.026.022.025.0
Percentage of ProvedUndevelopedReserveVolume19.20.00.00.00.0

srt:StandardizedMeasureOfDiscountedFutureNetCashFlowsRelatingToProvedOilAndGasReserves

srt:StandardizedMeasureOfDiscountedFutureNetCashFlowsRelatingToProvedOilAndGasReserves


Standardized
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-31
Value1.215.469108.6273.2873.233
Percentage of StandardizedMeasureOfDiscountedFutureNetCashFlowsRelatingToProvedOilAndGasReserves100.0100.0100.0100.0100.0100.0

srt:StandardizedMeasureOfDiscountedFutureNetCashFlowsRelatingToProvedOilAndGasReserves us-gaap:ConsolidatedEntities

us-gaap:VariableInterestEntityPrimaryBeneficiary


Standardized
Period End2020-12-31
Value0.359
Percentage of StandardizedMeasureOfDiscountedFutureNetCashFlowsRelatingToProvedOilAndGasReserves29.7

us-gaap:AccountsPayableRelatedPartiesCurrent

us-gaap:AccountsPayableRelatedPartiesCurrent


Accounts
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-31
Value8585698173889710098110
Percentage of AccountsPayableRelatedPartiesCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:AccountsPayableRelatedPartiesCurrent us-gaap:ConsolidatedEntities

ar:ParentCompanyAndGuarantorSubsidiaries


Accounts
Period End2021-06-302021-03-312020-12-31
Value858569
Percentage of AccountsPayableRelatedPartiesCurrent100.0100.0100.0

srt:GuarantorSubsidiaries


Accounts
Period End2020-09-30
Value35
Percentage of AccountsPayableRelatedPartiesCurrent43.0

srt:ParentCompany


Accounts
Period End2020-12-312020-09-302019-12-31
Value69514397
Percentage of AccountsPayableRelatedPartiesCurrent100.0631.4405.9

us-gaap:AccountsPayableRelatedPartiesCurrent us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName

ar:AnteroMidstream


Accounts
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-31
Value66635556536057605953
Percentage of AccountsPayableRelatedPartiesCurrent77.273.478.768.772.267.558.259.759.947.8

us-gaap:AccountsReceivableRelatedPartiesCurrent us-gaap:ConsolidatedEntities

us-gaap:AccountsReceivableRelatedPartiesCurrent

srt:GuarantorSubsidiaries


Accounts
Period End2020-09-302019-12-31
Value398299
Percentage of AccountsReceivableRelatedPartiesCurrent100.0100.0

us-gaap:AccruedFeesAndOtherRevenueReceivable

us-gaap:AccruedFeesAndOtherRevenueReceivable


Accrued
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302012-12-31
Value446425338254201317281308365474354321279300233218220261196133136128115125165191144139145968646
Percentage of AccruedFeesAndOtherRevenueReceivable100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:AccruedMarketingCostsCurrent

us-gaap:AccruedMarketingCostsCurrent


Accrued
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312015-12-31
Value7559685548285247475067468161593230355238
Percentage of AccruedMarketingCostsCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:AssetRetirementObligationsNoncurrent

us-gaap:AssetRetirementObligationsNoncurrent


Asset
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302012-12-312011-12-31
Value5655545958565455545258414038343836343236343230201918161413121111106.715
Percentage of AssetRetirementObligationsNoncurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:BankOverdrafts us-gaap:BalanceSheetLocation

us-gaap:BankOverdrafts

ar:RevenueDistributionsPayable


Bank
Period End2021-03-312020-12-312020-09-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-30
Value23151321183432272826
Percentage of BankOverdrafts100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:AccountsPayable


Bank
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302018-12-312018-09-30
Value12118.05.05.07.08.06.010.011
Percentage of BankOverdrafts52.273.361.50.023.838.923.518.835.743.8

us-gaap:CapitalizedCostsAccumulatedDepreciationDepletionAmortizationAndValuationAllowanceForRelatingToOilAndGasProducingActivities

us-gaap:CapitalizedCostsAccumulatedDepreciationDepletionAmortizationAndValuationAllowanceForRelatingToOilAndGasProducingActivities


Capitalized
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-31
Value381832843615278320891415802383158
Percentage of CapitalizedCostsAccumulatedDepreciationDepletionAmortizationAndValuationAllowanceForRelatingToOilAndGasProducingActivities100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:CapitalizedCostsOilAndGasProducingActivitiesGross

us-gaap:CapitalizedCostsOilAndGasProducingActivitiesGross


Capitalized
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-31
Value134351322814473133631188010207857651342925
Percentage of CapitalizedCostsOilAndGasProducingActivitiesGross100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:CapitalizedCostsOilAndGasProducingActivitiesNet

us-gaap:CapitalizedCostsOilAndGasProducingActivitiesNet


Capitalized
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-31
Value96179944108571057997918792777347502767
Percentage of CapitalizedCostsOilAndGasProducingActivitiesNet100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:CapitalizedCostsProvedProperties

us-gaap:CapitalizedCostsProvedProperties


Capitalized
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-31
Value1226011859127051109695498211651536211682
Percentage of CapitalizedCostsProvedProperties100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:CapitalizedCostsUnprovedProperties

us-gaap:CapitalizedCostsUnprovedProperties


Capitalized
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-31
Value117513681767226623311996206015131243
Percentage of CapitalizedCostsUnprovedProperties100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:CapitalizedCostsWellsAndRelatedEquipmentAndFacilities

us-gaap:CapitalizedCostsWellsAndRelatedEquipmentAndFacilities


Capitalized
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302012-12-31
Value5.8025.8025.8025.8025.8025.8025.8025.8021717247023842255213220501977188417851723165615961543150214481341127011971064873713584455168
Percentage of CapitalizedCostsWellsAndRelatedEquipmentAndFacilities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ContractualObligation

us-gaap:ContractualObligation


Contractual
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302014-12-312013-12-31
Value162201665416915173121761717842182801801517356176701806318230181451851418466185951882318626181121824817393175111797617902167023806
Percentage of ContractualObligation100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ContractualObligation us-gaap:OtherCommitments

ar:FirmTransportationAgreements


Contractual
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
Value1177812047121401239312641129261319713399136561384814089142561438814572147211504915166151231538715507
Percentage of ContractualObligation72.672.371.871.671.872.572.274.478.778.478.078.279.378.779.780.980.681.285.085.0

ar:LandPaymentObligations


Contractual
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-31
Value2.9762.9763.1874.3865.275.5988.427131718
Percentage of ContractualObligation0.00.00.00.00.00.00.00.10.10.1

ar:LongTermGasProcessingAgreement


Contractual
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
Value3593733863934074214324453493663666371135733740351433273418321823692379
Percentage of ContractualObligation2.22.22.32.32.32.42.42.52.02.120.320.419.720.219.017.918.217.313.113.0

ar:OperatingAndFinancingLeases


Contractual
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-30
Value24862550261426612564281628883233
Percentage of ContractualObligation15.315.315.515.414.615.815.817.9

us-gaap:LeaseAgreements


Contractual
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-31
Value159216801770185919991671175392333343438
Percentage of ContractualObligation9.810.110.510.711.39.49.65.119.219.5

us-gaap:ContractualObligationDueAfterFifthYear

us-gaap:ContractualObligationDueAfterFifthYear


Contractual
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302014-12-312013-12-31
Value72477242861986058534843099119416912190901052310409101811020511283111541108010652115761144511280116201203611959114271853
Percentage of ContractualObligationDueAfterFifthYear100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ContractualObligationDueAfterFifthYear us-gaap:OtherCommitments

ar:FirmTransportationAgreements


Contractual
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
Value6033602769476941692769307907781678077775875286908611858895449635956193621055110469
Percentage of ContractualObligationDueAfterFifthYear83.283.280.680.781.282.279.883.085.685.583.283.584.684.284.686.486.387.991.191.5

ar:LongTermGasProcessingAgreement


Contractual
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
Value98981131051051051521526466172216701521156816831502150212731000951
Percentage of ContractualObligationDueAfterFifthYear1.41.41.31.21.21.21.51.60.70.716.416.014.915.414.913.513.612.08.68.3

ar:OperatingAndFinancingLeases


Contractual
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-30
Value839839113811381103106913771248
Percentage of ContractualObligationDueAfterFifthYear11.611.613.213.212.912.713.913.3

us-gaap:LeaseAgreements


Contractual
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-31
Value27627641941939732547419812501249
Percentage of ContractualObligationDueAfterFifthYear3.83.84.94.94.73.94.82.113.713.7

us-gaap:ContractualObligationDueInFifthYear

us-gaap:ContractualObligationDueInFifthYear


Contractual
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302014-12-312013-12-31
Value1476147615261522150514821605153514331424141013981380138313821378137813401315131512681272128512681136349
Percentage of ContractualObligationDueInFifthYear100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ContractualObligationDueInFifthYear us-gaap:OtherCommitments

ar:FirmTransportationAgreements


Contractual
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
Value1018101898498197697710169949939841024102210221021103310531053103310841084
Percentage of ContractualObligationDueInFifthYear69.069.064.564.564.966.063.364.769.369.172.673.174.173.874.776.476.477.182.482.4

ar:LongTermGasProcessingAgreement


Contractual
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
Value14144747474758584848379369351355341317317299223224
Percentage of ContractualObligationDueInFifthYear1.01.03.13.13.13.23.73.83.33.426.926.425.425.724.723.023.022.317.017.0

ar:OperatingAndFinancingLeases


Contractual
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-30
Value299299306306286308342392
Percentage of ContractualObligationDueInFifthYear20.320.320.120.219.020.821.325.5

us-gaap:LeaseAgreements


Contractual
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-31
Value14314318618619514818790392392
Percentage of ContractualObligationDueInFifthYear9.79.712.212.313.010.011.75.927.427.5

us-gaap:ContractualObligationDueInFourthYear

us-gaap:ContractualObligationDueInFourthYear


Contractual
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302014-12-312013-12-31
Value1566156616501646162816051654158414591451143314211401140514391435143513971354134212841262126812421117354
Percentage of ContractualObligationDueInFourthYear100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ContractualObligationDueInFourthYear us-gaap:OtherCommitments

ar:FirmTransportationAgreements


Contractual
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
Value10241024102410211015101710561034103310251037103410341033108511061106108611051105
Percentage of ContractualObligationDueInFourthYear65.465.462.162.062.463.363.965.370.870.672.472.873.873.575.477.177.177.781.682.3

ar:LongTermGasProcessingAgreement


Contractual
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
Value47475958585858584848387378359364345321321303241230
Percentage of ContractualObligationDueInFourthYear3.13.13.63.63.63.73.53.73.33.327.026.625.625.924.022.422.421.717.817.1

ar:OperatingAndFinancingLeases


Contractual
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-30
Value306306334334310342313377
Percentage of ContractualObligationDueInFourthYear19.619.620.320.319.121.319.023.8

us-gaap:LeaseAgreements


Contractual
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-31
Value186186231231243187225113378378
Percentage of ContractualObligationDueInFourthYear11.911.914.014.114.911.713.67.225.926.1

us-gaap:ContractualObligationDueInNextTwelveMonths

us-gaap:ContractualObligationDueInNextTwelveMonths


Contractual
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302014-12-312013-12-31
Value1675167417491726171716941787176215791572161215531503150513881380138214231122119397098510261021873458
Percentage of ContractualObligationDueInNextTwelveMonths100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ContractualObligationDueInNextTwelveMonths us-gaap:OtherCommitments

ar:FirmTransportationAgreements


Contractual
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
Value10421042108010761075107611051123112211131075108710871086866886893937626709
Percentage of ContractualObligationDueInNextTwelveMonths62.262.261.762.362.663.661.863.771.170.866.770.072.372.262.464.264.665.855.859.4

ar:LandPaymentObligations


Contractual
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-31
Value0.40.42.8592.8592.8592.8595.245.5576.06.0
Percentage of ContractualObligationDueInNextTwelveMonths0.00.00.20.20.20.20.30.30.40.4

ar:LongTermGasProcessingAgreement


Contractual
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
Value52525455555555545455389360360365427401401398373370
Percentage of ContractualObligationDueInNextTwelveMonths3.13.13.13.23.23.33.13.13.43.524.123.224.024.330.829.129.028.033.231.0

ar:OperatingAndFinancingLeases


Contractual
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-30
Value269267265247224269304399
Percentage of ContractualObligationDueInNextTwelveMonths16.116.015.214.313.115.917.022.7

us-gaap:LeaseAgreements


Contractual
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-31
Value311311346344358289317179397398
Percentage of ContractualObligationDueInNextTwelveMonths18.618.619.819.920.917.117.810.225.125.3

us-gaap:ContractualObligationDueInSecondYear

us-gaap:ContractualObligationDueInSecondYear


Contractual
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302014-12-312013-12-31
Value1706170616691665165416311688166415051498158815471496149914971499149814601342133112701194119113041000416
Percentage of ContractualObligationDueInSecondYear100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ContractualObligationDueInSecondYear us-gaap:OtherCommitments

ar:FirmTransportationAgreements


Contractual
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
Value107210721037103310331034107611001098109011121107110711061087110711071088935935
Percentage of ContractualObligationDueInSecondYear62.962.862.162.162.463.463.866.173.072.870.071.674.073.872.673.873.974.569.770.2

ar:LandPaymentObligations


Contractual
Period End2020-12-312020-03-312019-12-312019-09-302019-06-302019-03-31
Value0.3280.3282.8593.1773.03.0
Percentage of ContractualObligationDueInSecondYear0.00.00.20.20.20.2

ar:LongTermGasProcessingAgreement


Contractual
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
Value59595252535354545454399397378383357340340322289286
Percentage of ContractualObligationDueInSecondYear3.53.53.13.23.23.33.23.23.63.625.125.725.325.623.822.722.722.121.521.5

ar:OperatingAndFinancingLeases


Contractual
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-30
Value300300267267242284265350
Percentage of ContractualObligationDueInSecondYear17.617.616.016.014.617.415.721.0

us-gaap:LeaseAgreements


Contractual
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-31
Value274274311311325258289157350351
Percentage of ContractualObligationDueInSecondYear16.116.118.718.719.715.917.19.423.323.4

us-gaap:ContractualObligationDueInThirdYear

us-gaap:ContractualObligationDueInThirdYear


Contractual
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302014-12-312013-12-31
Value1670167016991695167716541632159814601452149714841459146114771473147314351403138513211178117011081149374
Percentage of ContractualObligationDueInThirdYear100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ContractualObligationDueInThirdYear us-gaap:OtherCommitments

ar:FirmTransportationAgreements


Contractual
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
Value10451045106410611055105710341047104510371089108610871085110611271127110710861086
Percentage of ContractualObligationDueInThirdYear62.662.662.762.662.963.963.465.571.671.472.773.274.574.374.976.576.577.177.478.4

ar:LongTermGasProcessingAgreement


Contractual
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
Value59595958585853535454390382363367361337337319243230
Percentage of ContractualObligationDueInThirdYear3.53.53.53.53.53.53.33.43.73.726.125.724.925.124.422.922.922.217.316.6

ar:OperatingAndFinancingLeases


Contractual
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-30
Value333334300300275313285361
Percentage of ContractualObligationDueInThirdYear20.020.017.717.816.418.917.522.6

us-gaap:LeaseAgreements


Contractual
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-31
Value231231274274287225258135361361
Percentage of ContractualObligationDueInThirdYear13.913.916.116.217.213.615.98.524.724.9

us-gaap:ContractualObligationFutureMinimumPaymentsDueRemainderOfFiscalYear

us-gaap:ContractualObligationFutureMinimumPaymentsDueRemainderOfFiscalYear


Contractual
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-312017-09-302017-06-302017-03-312016-09-30
Value8781317451899134245279911834187251056276577919237
Percentage of ContractualObligationFutureMinimumPaymentsDueRemainderOfFiscalYear100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ContractualObligationFutureMinimumPaymentsDueRemainderOfFiscalYear us-gaap:OtherCommitments

ar:FirmTransportationAgreements


Contractual
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-312017-09-302017-06-302017-03-312016-09-30
Value541816278556832282558824230440653135319510119
Percentage of ContractualObligationFutureMinimumPaymentsDueRemainderOfFiscalYear61.661.961.761.962.062.569.869.755.060.761.848.955.355.550.2

ar:LandPaymentObligations


Contractual
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-31
Value2.5762.5761.5272.4112.4114.6538.09.0
Percentage of ContractualObligationFutureMinimumPaymentsDueRemainderOfFiscalYear0.30.20.30.30.21.01.00.8

ar:LongTermGasProcessingAgreement


Contractual
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-312017-09-302017-06-302017-03-312016-09-30
Value274114284213274115524133810920030488
Percentage of ContractualObligationFutureMinimumPaymentsDueRemainderOfFiscalYear3.13.13.13.13.13.03.43.537.133.232.039.534.733.137.1

ar:OperatingAndFinancingLeases


Contractual
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-09-30
Value13820166121228102
Percentage of ContractualObligationFutureMinimumPaymentsDueRemainderOfFiscalYear15.815.314.713.517.022.7

us-gaap:LeaseAgreements


Contractual
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-31
Value1682569019023648206309
Percentage of ContractualObligationFutureMinimumPaymentsDueRemainderOfFiscalYear19.219.520.121.217.610.725.826.1

us-gaap:ConvertibleDebtFairValueDisclosures us-gaap:FairValueByMeasurementBasis, us-gaap:LongtermDebtType

us-gaap:ConvertibleDebtFairValueDisclosures

us-gaap:EstimateOfFairValueFairValueDisclosure, ar:ConvertibleSeniorNotes4.25PercentDue2026


Convertible
Period End2020-08-21
Value172
Percentage of ConvertibleDebtFairValueDisclosures100.0

us-gaap:ConvertibleNotesPayable us-gaap:LongtermDebtType

us-gaap:ConvertibleNotesPayable

ar:ConvertibleSeniorNotes4.25PercentDue2026


Convertible
Period End2021-06-302020-12-31
Value81287
Percentage of ConvertibleNotesPayable100.0100.0

us-gaap:DebtInstrumentCarryingAmount us-gaap:LongtermDebtType

us-gaap:DebtInstrumentCarryingAmount

ar:ConvertibleSeniorNotes4.25PercentDue2026


Debt
Period End2021-06-30
Value82
Percentage of DebtInstrumentCarryingAmount100.0

ar:SeniorNotes5.375PercentDue2030


Debt
Period End2021-06-30
Value600
Percentage of DebtInstrumentCarryingAmount731.7

ar:SeniorNotes5125PercentDue2022


Debt
Period End2020-12-31
Value660
Percentage of DebtInstrumentCarryingAmount0.0

ar:SeniorNotes5625PercentDue2023


Debt
Period End2020-12-31
Value574
Percentage of DebtInstrumentCarryingAmount0.0

ar:SeniorNotes7625PercentDue2029


Debt
Period End2021-06-30
Value700
Percentage of DebtInstrumentCarryingAmount853.7

ar:SeniorNotes8375PercentDue2026


Debt
Period End2021-06-30
Value500
Percentage of DebtInstrumentCarryingAmount609.8

us-gaap:DebtInstrumentCarryingAmount us-gaap:LongtermDebtType, us-gaap:SubsequentEventType

ar:SeniorNotesDue2026, us-gaap:SubsequentEvent


Debt
Period End2021-07-01
Value325
Percentage of DebtInstrumentCarryingAmount0.0

us-gaap:DebtInstrumentConvertibleCarryingAmountOfTheEquityComponent us-gaap:LongtermDebtType

us-gaap:DebtInstrumentConvertibleCarryingAmountOfTheEquityComponent

ar:ConvertibleSeniorNotes4.25PercentDue2026


Debt
Period End2021-06-302021-03-312020-12-312020-09-30
Value32-14.75511584
Percentage of DebtInstrumentConvertibleCarryingAmountOfTheEquityComponent100.0100.0100.0100.0

us-gaap:DebtInstrumentFaceAmount

us-gaap:DebtInstrumentFaceAmount


Debt
Period End2021-06-302020-12-312014-09-18
Value24713129500
Percentage of DebtInstrumentFaceAmount100.0100.0100.0

us-gaap:DebtInstrumentFaceAmount us-gaap:LongtermDebtType

ar:ConvertibleSeniorNotes4.25PercentDue2026


Debt
Period End2020-09-022020-08-21
Value37250
Percentage of DebtInstrumentFaceAmount0.00.0

ar:SeniorNotes7625PercentDue2029


Debt
Period End2021-01-26
Value700
Percentage of DebtInstrumentFaceAmount0.0

ar:SeniorNotes8375PercentDue2026


Debt
Period End2021-01-04
Value500
Percentage of DebtInstrumentFaceAmount0.0

us-gaap:DebtInstrumentFaceAmount us-gaap:LongtermDebtType, us-gaap:SubsequentEventType

ar:SeniorNotes7625PercentDue2029, us-gaap:SubsequentEvent


Debt
Period End2021-01-26
Value700
Percentage of DebtInstrumentFaceAmount0.0

ar:SeniorNotes8375PercentDue2026, us-gaap:SubsequentEvent


Debt
Period End2021-01-04
Value500
Percentage of DebtInstrumentFaceAmount0.0

us-gaap:DebtInstrumentFairValue us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FairValueByMeasurementBasis

us-gaap:DebtInstrumentFairValue

us-gaap:FairValueInputsLevel2, us-gaap:EstimateOfFairValueFairValueDisclosure


Debt
Period End2021-06-302021-03-312020-12-312019-12-31
Value2848280822122783
Percentage of DebtInstrumentFairValue100.0100.0100.0100.0

us-gaap:DebtInstrumentFairValue us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FairValueByMeasurementBasis, us-gaap:LongtermDebtType

us-gaap:FairValueInputsLevel2, us-gaap:EstimateOfFairValueFairValueDisclosure, ar:ConvertibleSeniorNotes4.25PercentDue2026


Debt
Period End2021-06-302021-03-312020-12-31
Value291347430
Percentage of DebtInstrumentFairValue10.212.419.5

us-gaap:FairValueInputsLevel2, us-gaap:EstimateOfFairValueFairValueDisclosure, ar:SeniorNotes5.375PercentDue2030


Debt
Period End2021-06-30
Value612
Percentage of DebtInstrumentFairValue21.5

us-gaap:FairValueInputsLevel2, us-gaap:EstimateOfFairValueFairValueDisclosure, ar:SeniorNotes500PercentDue2025


Debt
Period End2021-06-302021-03-312020-12-312019-12-31
Value603590560450
Percentage of DebtInstrumentFairValue21.221.025.316.2

us-gaap:FairValueInputsLevel2, us-gaap:EstimateOfFairValueFairValueDisclosure, ar:SeniorNotes5125PercentDue2022


Debt
Period End2020-12-312019-12-31
Value658823
Percentage of DebtInstrumentFairValue29.829.6

us-gaap:FairValueInputsLevel2, us-gaap:EstimateOfFairValueFairValueDisclosure, ar:SeniorNotes5625PercentDue2023


Debt
Period End2021-03-312020-12-312019-12-31
Value576562602
Percentage of DebtInstrumentFairValue20.525.421.6

us-gaap:FairValueInputsLevel2, us-gaap:EstimateOfFairValueFairValueDisclosure, ar:SeniorNotes7625PercentDue2029


Debt
Period End2021-06-302021-03-31
Value775742
Percentage of DebtInstrumentFairValue27.226.4

us-gaap:FairValueInputsLevel2, us-gaap:EstimateOfFairValueFairValueDisclosure, ar:SeniorNotes8375PercentDue2026


Debt
Period End2021-06-302021-03-31
Value566551
Percentage of DebtInstrumentFairValue19.919.6

us-gaap:DebtInstrumentFairValue us-gaap:FairValueByMeasurementBasis

us-gaap:CarryingReportedAmountFairValueDisclosure


Debt
Period End2021-06-302021-03-312020-12-312019-12-31
Value2415242519843206
Percentage of DebtInstrumentFairValue84.886.489.7115.2

us-gaap:DebtInstrumentFairValue us-gaap:FairValueByMeasurementBasis, us-gaap:LongtermDebtType

us-gaap:CarryingReportedAmountFairValueDisclosure, ar:ConvertibleSeniorNotes4.25PercentDue2026


Debt
Period End2021-06-302021-03-312020-12-31
Value5082169
Percentage of DebtInstrumentFairValue1.82.97.7

us-gaap:CarryingReportedAmountFairValueDisclosure, ar:SeniorNotes5.375PercentDue2030


Debt
Period End2021-06-30
Value593
Percentage of DebtInstrumentFairValue20.8

us-gaap:CarryingReportedAmountFairValueDisclosure, ar:SeniorNotes500PercentDue2025


Debt
Period End2021-06-302021-03-312020-12-312019-12-31
Value585585585594
Percentage of DebtInstrumentFairValue20.620.926.521.4

us-gaap:CarryingReportedAmountFairValueDisclosure, ar:SeniorNotes5125PercentDue2022


Debt
Period End2020-12-312019-12-31
Value658918
Percentage of DebtInstrumentFairValue29.833.0

us-gaap:CarryingReportedAmountFairValueDisclosure, ar:SeniorNotes5625PercentDue2023


Debt
Period End2021-03-312020-12-312019-12-31
Value571571744
Percentage of DebtInstrumentFairValue20.425.826.8

us-gaap:CarryingReportedAmountFairValueDisclosure, ar:SeniorNotes7625PercentDue2029


Debt
Period End2021-06-302021-03-31
Value691691
Percentage of DebtInstrumentFairValue24.324.6

us-gaap:CarryingReportedAmountFairValueDisclosure, ar:SeniorNotes8375PercentDue2026


Debt
Period End2021-06-302021-03-31
Value494494
Percentage of DebtInstrumentFairValue17.417.6

us-gaap:DebtInstrumentFairValue us-gaap:LongtermDebtType

ar:ConvertibleSeniorNotes4.25PercentDue2026


Debt
Period End2020-08-21
Value203
Percentage of DebtInstrumentFairValue0.0

us-gaap:DebtInstrumentInterestRateEffectivePercentage us-gaap:LongtermDebtType

us-gaap:DebtInstrumentInterestRateEffectivePercentage

ar:ConvertibleSeniorNotes4.25PercentDue2026


Debt
Period End2020-08-21
Value10.8
Percentage of DebtInstrumentInterestRateEffectivePercentage100.0

us-gaap:DebtInstrumentInterestRateEffectivePercentage us-gaap:Restatement, us-gaap:StatementScenario, us-gaap:AdjustmentsForNewAccountingPronouncements, us-gaap:LongtermDebtType

srt:RestatementAdjustment, srt:ScenarioForecast, ar:AccountingStandardsUpdate202006, ar:ConvertibleSeniorNotes4.25PercentDue2026


Debt
Period End2022-01-01
Value4.8
Percentage of DebtInstrumentInterestRateEffectivePercentage0.0

us-gaap:DebtInstrumentRepurchasedFaceAmount us-gaap:DebtInstrument, us-gaap:LongtermDebtType

us-gaap:DebtInstrumentRepurchasedFaceAmount

ar:DebtRepurchaseProgram, ar:SeniorNotes5125PercentDue2022


Debt
Period End2021-03-31
Value661
Percentage of DebtInstrumentRepurchasedFaceAmount100.0

ar:DebtRepurchaseProgram, ar:SeniorNotes5625PercentDue2023


Debt
Period End2021-06-01
Value574
Percentage of DebtInstrumentRepurchasedFaceAmount0.0

us-gaap:DebtInstrumentRepurchasedFaceAmount us-gaap:LongtermDebtType

ar:ConvertibleSeniorNotes4.25PercentDue2026


Debt
Period End2021-01-12
Value150
Percentage of DebtInstrumentRepurchasedFaceAmount0.0

ar:SeniorNotes500PercentDue2025


Debt
Period End2020-12-31
Value10.0
Percentage of DebtInstrumentRepurchasedFaceAmount0.0

ar:SeniorNotes5625PercentDue2023


Debt
Period End2020-12-31
Value176
Percentage of DebtInstrumentRepurchasedFaceAmount0.0

us-gaap:DebtInstrumentRepurchasedFaceAmount us-gaap:LongtermDebtType, us-gaap:SubsequentEventType

ar:SeniorNotes5125PercentDue2022, us-gaap:SubsequentEvent


Debt
Period End2021-02-102021-01-16
Value311350
Percentage of DebtInstrumentRepurchasedFaceAmount0.00.0

us-gaap:DebtInstrumentRepurchasedFaceAmount us-gaap:LongtermDebtType, us-gaap:TypeOfArrangement

ar:ConvertibleSeniorNotes4.25PercentDue2026, ar:ConvertibleNoteRepurchaseWithShareOffering


Debt
Period End2021-01-12
Value150
Percentage of DebtInstrumentRepurchasedFaceAmount0.0

ar:ConvertibleSeniorNotes4.25PercentDue2026, ar:ConvertibleNoteRepurchaseWithShareOfferingInMay


Debt
Period End2021-05-13
Value56
Percentage of DebtInstrumentRepurchasedFaceAmount0.0

us-gaap:DebtInstrumentRepurchasedFaceAmount us-gaap:SubsequentEventType, us-gaap:TypeOfArrangement

us-gaap:SubsequentEvent, ar:ConvertibleNoteRepurchaseWithShareOffering


Debt
Period End2021-01-12
Value150
Percentage of DebtInstrumentRepurchasedFaceAmount0.0

us-gaap:DebtInstrumentUnamortizedDiscountPremiumNet

us-gaap:DebtInstrumentUnamortizedDiscountPremiumNet


Debt
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302016-12-312016-06-302016-03-312015-12-312015-09-302015-06-302014-12-31
Value295111183-0.542-0.6-0.791-1.095-1.168-1.241-1.312-1.382-1.452-1.52-1.588-1.749-5.974-6.245-6.513-6.777-7.038-7.55
Percentage of DebtInstrumentUnamortizedDiscountPremiumNet100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DebtInstrumentUnamortizedDiscountPremiumNet us-gaap:LongtermDebtType

ar:ConvertibleSeniorNotes4.25PercentDue2026


Debt
Period End2021-06-302021-03-312020-12-312020-09-302020-08-21
Value295111284-85.0
Percentage of DebtInstrumentUnamortizedDiscountPremiumNet100.0100.0100.3100.50.0

us-gaap:DeferredCompensationArrangementWithIndividualCashAwardGrantedAmount us-gaap:AwardType

us-gaap:DeferredCompensationArrangementWithIndividualCashAwardGrantedAmount

ar:CashAwards


Deferred
Period End2020-07-312020-07-012020-01-31
Value2600000.02600000.03300000.0
Percentage of DeferredCompensationArrangementWithIndividualCashAwardGrantedAmount100.0100.0100.0

us-gaap:DeferredFinanceCostsNet us-gaap:LongtermDebtType

us-gaap:DeferredFinanceCostsNet

ar:ConvertibleSeniorNotes4.25PercentDue2026


Deferred
Period End2021-06-302020-12-312020-09-30
Value1000000.03000000.03000000.0
Percentage of DeferredFinanceCostsNet100.0100.0100.0

us-gaap:DeferredIncomeCurrent

us-gaap:DeferredIncomeCurrent


Deferred
Period End2021-06-302021-03-312020-12-312020-09-30
Value41434543
Percentage of DeferredIncomeCurrent100.0100.0100.0100.0

us-gaap:DeferredIncomeNoncurrent

us-gaap:DeferredIncomeNoncurrent


Deferred
Period End2021-06-302021-03-312020-12-312020-09-30
Value137146156167
Percentage of DeferredIncomeNoncurrent100.0100.0100.0100.0

us-gaap:DeferredIncomeTaxLiabilities

us-gaap:DeferredIncomeTaxLiabilities


Deferred
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-31
Value1287149113651551153319101233787549
Percentage of DeferredIncomeTaxLiabilities100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DeferredTaxAssetsGross

us-gaap:DeferredTaxAssetsGross


Deferred
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-31
Value921756760789599567465466442
Percentage of DeferredTaxAssetsGross100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DeferredTaxAssetsGross us-gaap:Restatement

srt:RestatementAdjustment


Deferred
Period End2021-06-30
Value48
Percentage of DeferredTaxAssetsGross0.0

us-gaap:DeferredTaxAssetsOperatingLossCarryforwards

us-gaap:DeferredTaxAssetsOperatingLossCarryforwards


Deferred
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-31
Value565560734727562521431449417
Percentage of DeferredTaxAssetsOperatingLossCarryforwards100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DeferredTaxAssetsOther

us-gaap:DeferredTaxAssetsOther


Deferred
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-31
Value171515111618125.3735.006
Percentage of DeferredTaxAssetsOther100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsShareBasedCompensationCost

us-gaap:DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsShareBasedCompensationCost


Deferred
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-31
Value8.4457.6691012201610
Percentage of DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsShareBasedCompensationCost100.0100.0100.0100.0100.0100.0100.0

us-gaap:DeferredTaxLiabilitiesDeferredExpenseDeferredFinancingCosts us-gaap:LongtermDebtType

us-gaap:DeferredTaxLiabilitiesDeferredExpenseDeferredFinancingCosts

ar:ConvertibleSeniorNotes4.25PercentDue2026


Deferred
Period End2021-06-302020-12-312020-09-30
Value8.02820
Percentage of DeferredTaxLiabilitiesDeferredExpenseDeferredFinancingCosts100.0100.0100.0

us-gaap:DeferredTaxLiabilitiesDeferredExpenseDeferredFinancingCosts us-gaap:LongtermDebtType, us-gaap:TypeOfArrangement

ar:ConvertibleSeniorNotes4.25PercentDue2026, ar:ConvertibleNoteRepurchaseWithShareOffering


Deferred
Period End2021-03-31
Value14
Percentage of DeferredTaxLiabilitiesDeferredExpenseDeferredFinancingCosts0.0

us-gaap:DeferredTaxLiabilitiesDerivatives

us-gaap:DeferredTaxLiabilitiesDerivatives


Deferred
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-31
Value132062714426051167601328206
Percentage of DeferredTaxLiabilitiesDerivatives100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DerivativeAssetFairValueGrossLiability us-gaap:DerivativeInstrumentRisk

us-gaap:DerivativeAssetFairValueGrossLiability

us-gaap:CommodityContract


Derivative
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302012-12-31
Value29386912915792126211323514857456529295210368267.43765
Percentage of DerivativeAssetFairValueGrossLiability100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DerivativeAssets us-gaap:DerivativeInstrumentRisk

us-gaap:DerivativeAssets

us-gaap:CommodityContract


Derivative
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302012-12-31
Value52111826241100756816716436607116611841220130121671592739529631860708532
Percentage of DerivativeAssets100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:EmbeddedDerivativeFinancialInstruments


Derivative
Period End2021-06-302021-03-312020-12-312020-09-30
Value20324044
Percentage of DerivativeAssets0.061.736.353.6

us-gaap:DerivativeAssets us-gaap:HedgingDesignation

us-gaap:Nondesignated


Derivative
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value208415212762411007568167164366071166118412201301
Percentage of DerivativeAssets0.0161.7136.3153.6100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DerivativeAssetsCurrent

us-gaap:DerivativeAssetsCurrent


Derivative
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302012-12-31
Value1.0564110583521816422411346122245493420459460299452237734174299751009834664713692280175130183204160
Percentage of DerivativeAssetsCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DerivativeAssetsCurrent us-gaap:DerivativeInstrumentRisk, us-gaap:HedgingDesignation

us-gaap:CommodityContract, us-gaap:Nondesignated


Derivative
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302012-12-31
Value369775521816422411346122245493420459460299452237734174299751009834664713692280175130183204160
Percentage of DerivativeAssetsCurrent88.692.491.2100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:EmbeddedDerivativeFinancialInstruments, us-gaap:Nondesignated


Derivative
Period End2021-06-302021-03-312020-12-312020-09-30
Value1.0564.7237.9867.281
Percentage of DerivativeAssetsCurrent100.011.47.68.8

us-gaap:DerivativeAssetsLiabilitiesAtFairValueNet us-gaap:HedgingDesignation

us-gaap:DerivativeAssetsLiabilitiesAtFairValueNet

us-gaap:DesignatedAsHedgingInstrument


Derivative
Period End2021-06-302021-03-312020-12-312019-12-312018-12-31
Value-918.067-161.06822745606
Percentage of DerivativeAssetsLiabilitiesAtFairValueNet100.0100.0100.0100.0100.0

us-gaap:Nondesignated


Derivative
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value-130.02861811007458167164326061155115311781273
Percentage of DerivativeAssetsLiabilitiesAtFairValueNet0.00.00.0100.00.00.00.0100.00.00.00.00.0

us-gaap:DerivativeAssetsNoncurrent

us-gaap:DerivativeAssetsNoncurrent


Derivative
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302012-12-31
Value194347441032843334053693133626727637608418761600181117312015167320982108200713051453899458354500677503371
Percentage of DerivativeAssetsNoncurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DerivativeAssetsNoncurrent us-gaap:DerivativeInstrumentRisk, us-gaap:HedgingDesignation

us-gaap:CommodityContract, us-gaap:Nondesignated


Derivative
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302012-12-31
Value15146.9981032843334053693133626727637608418761600181117312015167320982108200713051453899458354500677503371
Percentage of DerivativeAssetsNoncurrent36.331.115.9100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:EmbeddedDerivativeFinancialInstruments, us-gaap:Nondesignated


Derivative
Period End2021-06-302021-03-312020-12-312020-09-30
Value19273237
Percentage of DerivativeAssetsNoncurrent100.063.768.984.1

us-gaap:DerivativeFairValueOfDerivativeAsset us-gaap:DerivativeInstrumentRisk

us-gaap:DerivativeFairValueOfDerivativeAsset

us-gaap:CommodityContract


Derivative
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302012-12-31
Value29901812127821193882838729459658121412421265136721961621792632700887715597
Percentage of DerivativeFairValueOfDerivativeAsset100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:EmbeddedDerivativeFinancialInstruments


Derivative
Period End2021-06-302021-03-312020-12-312020-09-30
Value20324044
Percentage of DerivativeFairValueOfDerivativeAsset68.635.522.420.9

us-gaap:DerivativeFairValueOfDerivativeLiability us-gaap:DerivativeInstrumentRisk

us-gaap:DerivativeFairValueOfDerivativeLiability

us-gaap:CommodityContract


Derivative
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312014-09-302014-06-302014-03-312013-12-31
Value9682841993861639213721132751536649722.677-55.818-21.031-0.646
Percentage of DerivativeFairValueOfDerivativeLiability100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DerivativeLiabilities us-gaap:ConsolidatedEntities, us-gaap:DerivativeInstrumentRisk, us-gaap:HedgingDesignation

us-gaap:DerivativeLiabilities

us-gaap:VariableInterestEntityPrimaryBeneficiary, us-gaap:CommodityContract, us-gaap:Nondesignated


Derivative
Period End2021-06-302021-03-312020-12-312020-09-302020-06-30
Value502314162.0
Percentage of DerivativeLiabilities100.0100.0100.0100.0100.0

us-gaap:DerivativeLiabilities us-gaap:DerivativeInstrumentRisk

us-gaap:CommodityContract


Derivative
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312014-09-302014-06-302014-03-312013-12-31
Value9382451302576.210.215100.2743.8940.5325.0459.2334.7057.2890.086-41.983-19.285-0.646
Percentage of DerivativeLiabilities1877.01068.1931.51607.2310.50.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:DerivativeLiabilities us-gaap:HedgingDesignation

us-gaap:Nondesignated


Derivative
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value9382451302576.210.215100.2743.8940.53210304128
Percentage of DerivativeLiabilities1877.01068.1931.51607.2310.50.00.00.00.00.00.00.00.00.0

us-gaap:DerivativeLiabilitiesCurrent

us-gaap:DerivativeLiabilitiesCurrent


Derivative
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302019-12-312019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302014-06-302014-03-312013-12-312013-09-30
Value733146311073.6526.7210.2743.8940.532103041284.2853.279542033.112.72611170.6460.309
Percentage of DerivativeLiabilitiesCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DerivativeLiabilitiesCurrent us-gaap:ConsolidatedEntities, us-gaap:DerivativeInstrumentRisk, us-gaap:HedgingDesignation

us-gaap:VariableInterestEntityPrimaryBeneficiary, us-gaap:CommodityContract, us-gaap:Nondesignated


Derivative
Period End2021-06-302021-03-312020-12-312020-09-30
Value29137.08.0
Percentage of DerivativeLiabilitiesCurrent4.08.922.47.4

us-gaap:DerivativeLiabilitiesCurrent us-gaap:DerivativeInstrumentRisk, us-gaap:HedgingDesignation

us-gaap:CommodityContract, us-gaap:Nondesignated


Derivative
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302019-12-312019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302014-06-302014-03-312013-12-312013-09-30
Value733146311073.6526.7210.2743.8940.5325.0459.2334.7057.0824.2853.279542033.1111170.6460.309
Percentage of DerivativeLiabilitiesCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.048.230.111.224.9100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DerivativeLiabilitiesNoncurrent

us-gaap:DerivativeLiabilitiesNoncurrent


Derivative
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-06-302014-06-30
Value20498991492.5580.2153.5190.2070.4270.1720.1020.2340.045.1790.3750.65130
Percentage of DerivativeLiabilitiesNoncurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DerivativeLiabilitiesNoncurrent us-gaap:ConsolidatedEntities, us-gaap:DerivativeInstrumentRisk, us-gaap:HedgingDesignation

us-gaap:VariableInterestEntityPrimaryBeneficiary, us-gaap:CommodityContract, us-gaap:Nondesignated


Derivative
Period End2021-06-302021-03-312020-12-312020-09-30
Value2110.07.08.0
Percentage of DerivativeLiabilitiesNoncurrent10.310.17.15.4

us-gaap:DerivativeLiabilitiesNoncurrent us-gaap:DerivativeInstrumentRisk, us-gaap:HedgingDesignation

us-gaap:CommodityContract, us-gaap:Nondesignated