AM


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

Table of contents



us-gaap:CommonStockValue

us-gaap:CommonStockSharesIssued
us-gaap:StatementClassOfStock
us-gaap:PreferredStockSharesIssued

us-gaap:CommonStockSharesAuthorized

us-gaap:PreferredStockSharesAuthorized
us-gaap:StatementClassOfStock

us-gaap:CommonStockSharesOutstanding
us-gaap:StatementEquityComponents

us-gaap:WeightedAverageNumberOfDilutedSharesOutstanding

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

us-gaap:EarningsPerShareBasic

us-gaap:EarningsPerShareDiluted

us-gaap:EarningsPerShareBasicAndDiluted

us-gaap:AllocatedShareBasedCompensationExpense
us-gaap:AwardType
us-gaap:ConsolidatedEntities
us-gaap:ConsolidationItems
us-gaap:ConsolidationItems, us-gaap:StatementBusinessSegments
us-gaap:RelatedPartyTransactionsByRelatedParty

us-gaap:GainsLossesOnExtinguishmentOfDebt
dei:LegalEntity, us-gaap:CreditFacility

us-gaap:GeneralAndAdministrativeExpense

us-gaap:IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest

us-gaap:IncomeTaxExpenseBenefit

us-gaap:IncomeTaxesPaidNet

us-gaap:InterestIncomeExpenseNet

us-gaap:InterestPaidNet

us-gaap:NetIncomeLossAvailableToCommonStockholdersBasic

us-gaap:OperatingExpenses
us-gaap:ConsolidationItems
us-gaap:ConsolidationItems, us-gaap:StatementBusinessSegments

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

us-gaap:OtherNonoperatingIncomeExpense

us-gaap:PreferredStockDividendsIncomeStatementImpact

us-gaap:ProfitLoss
us-gaap:StatementEquityComponents

us-gaap:RevenueFromContractWithCustomerIncludingAssessedTax
us-gaap:ConsolidationItems, us-gaap:MajorCustomers, us-gaap:StatementBusinessSegments
us-gaap:ContractWithCustomerBasisOfPricing, us-gaap:StatementBusinessSegments
us-gaap:MajorCustomers
us-gaap:ProductOrService
us-gaap:ProductOrService, us-gaap:StatementBusinessSegments

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

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

us-gaap:Liabilities

us-gaap:LiabilitiesAndStockholdersEquity
us-gaap:EquityMethodInvestmentNonconsolidatedInvestee

us-gaap:StockholdersEquity
us-gaap:EquityMethodInvestmentNonconsolidatedInvestee
us-gaap:StatementEquityComponents

us-gaap:AssetsCurrent
us-gaap:EquityMethodInvestmentNonconsolidatedInvestee

us-gaap:CashAndCashEquivalentsAtCarryingValue

us-gaap:CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents

us-gaap:AccountsReceivableNetCurrent

us-gaap:OtherAssetsCurrent
us-gaap:EquityMethodInvestmentNonconsolidatedInvestee
us-gaap:AssetsNoncurrent

us-gaap:PropertyPlantAndEquipmentGross
us-gaap:PropertyPlantAndEquipmentByType

us-gaap:AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment

us-gaap:AmortizationOfIntangibleAssets
us-gaap:ConsolidationItems, us-gaap:StatementBusinessSegments
us-gaap:FiniteLivedIntangibleAssetsByMajorClass
us-gaap:StatementBusinessSegments

us-gaap:PropertyPlantAndEquipmentNet

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

us-gaap:FiniteLivedIntangibleAssetsNet
us-gaap:FiniteLivedIntangibleAssetsByMajorClass

us-gaap:DeferredTaxAssetsLiabilitiesNet

us-gaap:OtherAssetsNoncurrent

us-gaap:AccountsPayableCurrent

us-gaap:AccruedLiabilitiesCurrent

us-gaap:LiabilitiesCurrent
us-gaap:EquityMethodInvestmentNonconsolidatedInvestee

us-gaap:OtherAccruedLiabilitiesCurrent

us-gaap:OtherLiabilitiesCurrent
us-gaap:EquityMethodInvestmentNonconsolidatedInvestee
us-gaap:LiabilitiesNoncurrent

us-gaap:LongTermDebt
us-gaap:CreditFacility

us-gaap:LongTermDebtNoncurrent
us-gaap:EquityMethodInvestmentNonconsolidatedInvestee
us-gaap:MinorityInterest

us-gaap:OtherLiabilitiesNoncurrent

us-gaap:StockholdersEquity
us-gaap:EquityMethodInvestmentNonconsolidatedInvestee
us-gaap:StatementEquityComponents

us-gaap:CommonStockValue

us-gaap:AdditionalPaidInCapital

us-gaap:RetainedEarningsAccumulatedDeficit
us-gaap:EquityMethodInvestmentNonconsolidatedInvestee
us-gaap:MinorityInterest

us-gaap:NetCashProvidedByUsedInOperatingActivities

us-gaap:NetCashProvidedByUsedInInvestingActivities

us-gaap:NetCashProvidedByUsedInFinancingActivities

us-gaap:CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect

us-gaap:AmortizationOfFinancingCosts

us-gaap:DeferredIncomeTaxExpenseBenefit

us-gaap:IncreaseDecreaseInAccountsPayable

us-gaap:IncreaseDecreaseInAccountsReceivable

us-gaap:NetCashProvidedByUsedInOperatingActivities

us-gaap:ProfitLoss
us-gaap:StatementEquityComponents

us-gaap:ShareBasedCompensation

us-gaap:NetCashProvidedByUsedInInvestingActivities

us-gaap:PaymentsToAcquirePropertyPlantAndEquipment

us-gaap:NetCashProvidedByUsedInFinancingActivities

us-gaap:PaymentsOfDividendsCommonStock

us-gaap:PaymentsForRepurchaseOfCommonStock

us-gaap:DeferredTaxAssetsNet

am:CapitalExpendituresForSegmentPropertyAndEquipment
us-gaap:ConsolidationItems, us-gaap:StatementBusinessSegments

am:CostOfRevenueExcludingDepreciationAndAmortization
dei:LegalEntity, us-gaap:CreditFacility
am:DebtInstrumentAmountRedeemed
dei:LegalEntity, us-gaap:CreditFacility
am:DebtInstrumentRedemptionPricePercentageUponChangeOfControl
dei:LegalEntity, us-gaap:CreditFacility, us-gaap:DebtInstrumentRedemptionPeriod
am:DebtInstrumentRedemptionPricePercentageWithPaymentOfPremiumAndAccruedAndUnpaidInterest

am:FacilityIdling
us-gaap:ConsolidationItems, us-gaap:StatementBusinessSegments
us-gaap:RestructuringCostAndReserve

am:GeneralAndAdministrativeExpenseBeforeEquityBasedCompensation
us-gaap:ConsolidationItems
us-gaap:ConsolidationItems, us-gaap:StatementBusinessSegments
dei:LegalEntity, us-gaap:CreditFacility, us-gaap:DebtInstrumentRedemptionPeriod
am:PercentageOfAggregatePrincipalAmountThatCanBeRedeemed
dei:LegalEntity, us-gaap:Range, us-gaap:CreditFacility
us-gaap:AwardType
am:PerformanceShareUnitAwardsExpense

amgp:BusinessAcquisitionContingentConsiderationAccretionAndChangeInFairValueAndAccretionOfAssetRetirementObligations

amgp:CapitalExpendituresForSegmentPropertyAndEquipment
us-gaap:ConsolidationItems, us-gaap:StatementBusinessSegments

amgp:ChangeInCapitalExpendituresIncurredButNotYetPaid

amgp:CostOfRevenueExcludingDepreciationAndAmortization
us-gaap:CreditFacility
amgp:DebtInstrumentRedemptionPricePercentageUponChangeOfControl
us-gaap:CreditFacility, us-gaap:DebtInstrumentRedemptionPeriod
amgp:DebtInstrumentRedemptionPricePercentageWithPaymentOfPremiumAndAccruedAndUnpaidInterest

amgp:FacilityIdling
us-gaap:ConsolidationItems, us-gaap:StatementBusinessSegments
us-gaap:RestructuringCostAndReserve
us-gaap:TypeOfArrangement
amgp:GatheringAndCompressionAgreementMinimumVolumeCommitmentThatRequireAnteroToPayForCompressorStations
us-gaap:TypeOfArrangement
amgp:GatheringAndCompressionAgreementMinimumVolumeCommitmentThatRequireAnteroToPayForHighPressureLines

amgp:GeneralAndAdministrativeExpenseBeforeEquityBasedCompensation
us-gaap:ConsolidationItems
us-gaap:ConsolidationItems, us-gaap:StatementBusinessSegments

amgp:PaymentsToAcquireInterestInJointVentureAdditionalInvestment
us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName

amgp:PaymentsToAcquireWaterHandlingAndTreatmentSystems
us-gaap:Range, us-gaap:CreditFacility
amgp:PercentageOfAggregatePrincipalAmountThatCanBeRedeemed
us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName
amgp:PercentageOfInterestHeldInThirdPartyAssets
us-gaap:TypeOfArrangement
amgp:ThirdPartyOutOfPocketCostsReimbursementPercentage

us-gaap:AdjustmentsToAdditionalPaidInCapitalDividendsInExcessOfRetainedEarnings
us-gaap:StatementEquityComponents

us-gaap:AssetImpairmentCharges

us-gaap:AssetRetirementObligationCashPaidToSettle

us-gaap:CommonStockDividendsPerShareCashPaid
us-gaap:RelatedPartyTransactionsByRelatedParty
us-gaap:CostDirectLabor
dei:LegalEntity, us-gaap:CreditFacility
us-gaap:DebtInstrumentRedemptionPricePercentage
dei:LegalEntity, us-gaap:CreditFacility, us-gaap:DebtInstrumentRedemptionPeriod
us-gaap:CreditFacility, us-gaap:DebtInstrumentRedemptionPeriod

us-gaap:Depreciation

us-gaap:DepreciationAndAmortization
us-gaap:ConsolidationItems, us-gaap:StatementBusinessSegments

us-gaap:DirectOperatingCosts
us-gaap:ConsolidationItems, us-gaap:StatementBusinessSegments
us-gaap:DistributionsMadeToMemberOrLimitedPartnerByDistributionType
us-gaap:DistributionMadeToLimitedPartnerCashDistributionsPaid
us-gaap:DistributionsMadeToMemberOrLimitedPartnerByDistributionType, us-gaap:StatementClassOfStock
us-gaap:DistributionsMadeToMemberOrLimitedPartnerByDistributionType
us-gaap:DistributionMadeToLimitedPartnerDistributionsPaidPerUnit

us-gaap:EquityMethodInvestmentDividendsOrDistributions
us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName

us-gaap:GainLossOnDispositionOfAssets1
us-gaap:ConsolidationItems, us-gaap:StatementBusinessSegments

us-gaap:GoodwillImpairmentLoss
us-gaap:ConsolidationItems, us-gaap:StatementBusinessSegments

us-gaap:ImpairmentOfLongLivedAssetsHeldForUse
us-gaap:ConsolidationItems, us-gaap:StatementBusinessSegments

us-gaap:ImpairmentOfLongLivedAssetsToBeDisposedOf
us-gaap:ConsolidationItems, us-gaap:StatementBusinessSegments

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

us-gaap:IncreaseDecreaseInAccruedLiabilities

us-gaap:IncreaseDecreaseInDueFromAffiliatesCurrent

us-gaap:IncreaseDecreaseInDueToAffiliates

us-gaap:IncreaseDecreaseInIncomeTaxesReceivable

us-gaap:IncreaseDecreaseInOtherCurrentAssets

us-gaap:IncreaseDecreaseInOtherNoncurrentAssets

us-gaap:IncrementalCommonSharesAttributableToConversionOfPreferredStock

us-gaap:IncrementalCommonSharesAttributableToShareBasedPaymentArrangements
us-gaap:AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareByAntidilutiveSecurities
us-gaap:Range, us-gaap:CreditFacility, us-gaap:InternalCreditAssessment
us-gaap:LineOfCreditFacilityUnusedCapacityCommitmentFeePercentage

us-gaap:PaymentForContingentConsiderationLiabilityFinancingActivities

us-gaap:PaymentForContingentConsiderationLiabilityOperatingActivities

us-gaap:PaymentsOfDividendsPreferredStockAndPreferenceStock
us-gaap:StatementClassOfStock

us-gaap:PaymentsOfFinancingCosts

us-gaap:PaymentsRelatedToTaxWithholdingForShareBasedCompensation

us-gaap:PaymentsToAcquireInterestInJointVenture
us-gaap:StatementClassOfStock
us-gaap:PreferredStockAmountOfPreferredDividendsInArrears

us-gaap:ProceedsFromIncomeTaxRefunds

us-gaap:ProceedsFromPaymentsForOtherFinancingActivities

us-gaap:ProceedsFromRepaymentsOfLinesOfCredit

us-gaap:ProceedsFromSaleOfProductiveAssets
us-gaap:RelatedPartyTransactionsByRelatedParty
us-gaap:RelatedPartyTransactionSellingGeneralAndAdministrativeExpensesFromTransactionsWithRelatedParty

us-gaap:ResultsOfOperationsAccretionOfAssetRetirementObligations
us-gaap:ConsolidationItems, us-gaap:StatementBusinessSegments
us-gaap:AwardType
us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeituresWeightedAverageGrantDateFairValue
us-gaap:AwardType
us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue
us-gaap:AwardType
us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodWeightedAverageGrantDateFairValue

us-gaap:StockGrantedDuringPeriodValueSharebasedCompensation
us-gaap:StatementEquityComponents
us-gaap:StatementEquityComponents
us-gaap:StockIssuedDuringPeriodSharesShareBasedCompensation

us-gaap:StockIssuedDuringPeriodValueShareBasedCompensation
us-gaap:StatementEquityComponents

am:AccruedCapitalExpendituresCurrent

am:AccruedOperatingExpensesCurrent

am:AccruedProductionTaxes
us-gaap:AwardType
am:CashAwardsAccrued

am:FiniteLivedIntangibleAssetsAmortizationExpenseYearFiveAndAfterYearFive
us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName
am:NumberOfMilesPipelinesOperated

am:ReceivablesFromContractsWithCustomers

amgp:AccruedCapitalExpendituresCurrent

amgp:AccruedOperatingExpensesCurrent

amgp:AccruedProductionTaxes
us-gaap:AwardType
amgp:CashAwardsAccrued

amgp:FiniteLivedIntangibleAssetsAmortizationExpenseYearFiveAndAfterYearFive
us-gaap:TypeOfArrangement
amgp:MinimumRevenueAmountUnderVolumeCommitments
us-gaap:TypeOfArrangement
amgp:MinimumRevenueAmountUnderVolumeCommitmentsAfterYearFive
us-gaap:TypeOfArrangement
amgp:MinimumRevenueAmountUnderVolumeCommitmentsNextTwelveMonths
us-gaap:TypeOfArrangement
amgp:MinimumRevenueAmountUnderVolumeCommitmentsYearFive
us-gaap:TypeOfArrangement
amgp:MinimumRevenueAmountUnderVolumeCommitmentsYearFour
us-gaap:TypeOfArrangement
amgp:MinimumRevenueAmountUnderVolumeCommitmentsYearThree
us-gaap:TypeOfArrangement
amgp:MinimumRevenueAmountUnderVolumeCommitmentsYearTwo

amgp:ReceivablesFromContractsWithCustomers

us-gaap:AssetRetirementObligationCurrent

us-gaap:DebtInstrumentCarryingAmount
dei:LegalEntity, us-gaap:CreditFacility
us-gaap:ConsolidatedEntities, us-gaap:CreditFacility
us-gaap:CreditFacility
dei:LegalEntity, us-gaap:CreditFacility
us-gaap:DebtInstrumentFaceAmount
us-gaap:CreditFacility, us-gaap:FairValueByFairValueHierarchyLevel
us-gaap:DebtInstrumentFairValue

us-gaap:DebtInstrumentUnamortizedPremium
us-gaap:ConsolidatedEntities, us-gaap:CreditFacility
us-gaap:DebtWeightedAverageInterestRate
us-gaap:AwardType
us-gaap:DeferredCompensationArrangementWithIndividualCashAwardGrantedAmount

us-gaap:DeferredFinanceCostsNet

us-gaap:DeferredIncomeTaxAssetsNet

us-gaap:DeferredTaxAssetsCharitableContributionCarryforwards

us-gaap:DeferredTaxAssetsGross

us-gaap:DeferredTaxAssetsInvestmentInSubsidiaries

us-gaap:DeferredTaxAssetsOperatingLossCarryforwards

us-gaap:DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsShareBasedCompensationCost

us-gaap:DueFromAffiliateCurrent

us-gaap:DueToAffiliateCurrent

us-gaap:DueToRelatedPartiesCurrent
us-gaap:AwardType
us-gaap:EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedShareBasedAwardsOtherThanOptions
us-gaap:RelatedPartyTransactionsByRelatedParty
us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName
us-gaap:EquityMethodInvestmentOwnershipPercentage
us-gaap:FiniteLivedIntangibleAssetsByMajorClass
us-gaap:FiniteLivedIntangibleAssetsAmortizationExpenseAfterYearFive

us-gaap:FiniteLivedIntangibleAssetsAmortizationExpenseRemainderOfFiscalYear
us-gaap:FiniteLivedIntangibleAssetsByMajorClass

us-gaap:IncomeTaxesReceivable

us-gaap:InterestPayableCurrent
us-gaap:ConsolidatedEntities, us-gaap:CreditFacility
us-gaap:LineOfCreditFacilityMaximumBorrowingCapacity
us-gaap:IncomeTaxAuthority
us-gaap:OperatingLossCarryforwards
us-gaap:StatementClassOfStock
us-gaap:PreferredStockSharesOutstanding
us-gaap:TypeOfArrangement
us-gaap:RevenueRemainingPerformanceObligation
us-gaap:AwardType
us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber
us-gaap:AwardType
us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue
us-gaap:AwardType
us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAvailableForGrant
us-gaap:AwardType
us-gaap:SharebasedCompensationArrangementBySharebasedPaymentAwardEquityInstrumentsOtherThanOptionsAggregateIntrinsicValueNonvested

Plots across concepts


IncomeStatement
Profit Loss
Expenses
Other Nonoperating Income Expense
Balance Sheet
Cash And Cash Equivalents At Carrying Value
Assets
Cash And Cash Equivalents At Carrying Value
Current Assets
Other Assets Current
NonCurrent Assets
Other Assets Noncurrent
PropertyPlantAndEquipmentNet
Accumulated Depreciation Depletion And Amortization Property Plant And Equipment
Liabilities
Liabilities Current
Current Liabilities
Other Accrued Liabilities Current
Noncurrent Liabilities
Other Liabilities Noncurrent
Stockholders Equity
Retained Earnings Accumulated Deficit
Per Share
Earnings Per Share Diluted
CashFlow
Net Cash Provided By Used In Financing Activities
NetCashProvidedByUsedInOperatingActivities
Increase Decrease In Accounts Receivable
NetCashProvidedByUsedInInvestingActivities
Net Cash Provided By Used In Investing Activities
NetCashProvidedByUsedInFinancingActivities
Net Cash Provided By Used In Financing Activities
Shares
Weighted Average Number Of Shares Outstanding Basic
DividendsAndRepurchase
Payments For Repurchase Of Common Stock

Tables

  2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
us-gaap:CommonStockValue ▁▁▁▄█4.7664.7664.7654.7944.84NANANANANANANA
us-gaap:CommonStockSharesIssued ████▁▁▁█▁476.639476.597476.486479.3850.4840420.5033780.506847506.6409470.0NANANA
 us-gaap:PreferredStockSharesIssued us-gaap:StatementClassOfStock us-gaap:PreferredClassA██████▁█▁0.010.010.010.010.010.011e-050.010.0NANANA
us-gaap:CommonStockSharesAuthorized 2000.0NA2000.02000.02.02.02.02000.00.0NANANA
us-gaap:PreferredStockSharesAuthorized ██████▁█▁100.0100.0100.0100.0100.0100.00.1100.00.0NANANA
us-gaap:CommonStockSharesOutstanding ████▁▁▁█▁476.639476.597476.486479.3850.4840420.5033780.506847506.6409470.0NANANA
us-gaap:WeightedAverageNumberOfDilutedSharesOutstanding NA478.694478.837483.103NA506.419507.767254.903NA186.208186.199186.188
us-gaap:WeightedAverageNumberOfSharesOutstandingBasic NA476.578476.836483.103NA506.419506.816253.877NA0.186208186.199186.188
 us-gaap:AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount us-gaap:AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareByAntidilutiveSecurities us-gaap:RestrictedStockUnitsRSUNA2.9951.7340.098NA0.034NANANANANANA
us-gaap:EarningsPerShareBasic ███▁▅▃▇▇▇▇▇0.160.220.19-0.81-0.29-0.570.140.040.10.090.07NA
us-gaap:EarningsPerShareDiluted ███▁▅▃▇▇0.160.220.18-0.81-0.29-0.570.140.04NANANANA
us-gaap:EarningsPerShareBasicAndDiluted NA0.210000000000000020.18000000000000005-0.81-0.29-0.570.140.040.10.090.070.07
  2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
 Operating Margin us-gaap:ConsolidationItems,us-gaap:StatementBusinessSegments us-gaap:OperatingSegments,am:GatheringAndCompressionNANA164.752NANANANANANANANANA
 Operating Margin us-gaap:ConsolidationItems,us-gaap:StatementBusinessSegments us-gaap:OperatingSegments,am:WaterHandlingNANA54.984NANANANANANANANANA
 Operating Margin us-gaap:ConsolidationItems,us-gaap:StatementBusinessSegments us-gaap:OperatingSegments,amgp:GatheringAndCompressionNA180.872164.752153.891154.776159.356166.52333.033NANANANA
 Operating Margin us-gaap:ConsolidationItems,us-gaap:StatementBusinessSegments us-gaap:OperatingSegments,amgp:WaterHandlingNA52.54354.98489.81784.29184.43989.09521.075NANANANA
  2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
 TTM Greenblatt ROC _ _███▁▄▃█▇114.983151.817134.726-519.164-192.603-334.089117.59110.608NANANANA
  2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
us-gaap:AllocatedShareBasedCompensationExpense ▁▁▁▁█▇█▄3.0653.6782.6973.33820.42220.12921.54311.423NANANANA
us-gaap:GainsLossesOnExtinguishmentOfDebt NANANANANANANANANANANANA
 us-gaap:GainsLossesOnExtinguishmentOfDebt dei:LegalEntity,us-gaap:CreditFacility am:AnteroMidstreamPartnersAndAnteroMidstreamFinanceCorp,am:SeniorNotesDue2024Bearing5.375RateNANANANANANANANANANANANA
us-gaap:GeneralAndAdministrativeExpense ▄▄▃▄█▇█▅▁▁▁▁13.02213.23212.42213.53733.08730.59534.62219.8093.1832.2292.3980.925
us-gaap:IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest ███▁▄▃█▇▇▇▇▇98.652140.489120.362-537.718-212.799-351.74599.6937.27131.46326.94521.61818.893
us-gaap:IncomeTaxExpenseBenefit ███▁▄▄█▇▇▇▇▇22.19434.98231.921-144.785-68.24-62.26830.4192.37710.0758.9177.2316.088
us-gaap:IncomeTaxesPaidNet █▁0.2950.0NANA0.0780.0NANA8.9249.004NANA
us-gaap:InterestIncomeExpenseNet ▁▂▂▁▂▂▂▇███-39.564-34.501-35.311-37.631-36.53-36.134-31.521-6.217-0.054-0.068-0.018NA
us-gaap:InterestPaidNet ▁▇▁█▁▅▂▃5.30660.7617.05667.6097.94543.92411.89719.25NANANANA
us-gaap:NetIncomeLossAvailableToCommonStockholdersBasic ███▁▄▂▇▇▇▇▇▇76.321105.36988.304-393.071-144.697-289.61569.1359.61917.66917.4313.88112.392
us-gaap:OperatingExpenses ▂▂▂█▅▆▂▁▁▁▁▁88.87781.59885.01762.872431.67577.884138.02743.511.97910.80311.5099.56
us-gaap:OperatingIncomeLoss ███▁▄▃█▇▇▇▇▆114.983151.817134.726-519.164-192.603-334.089117.59110.60831.51727.01321.636-9.56
us-gaap:OtherNonoperatingIncomeExpense NANA-14.364NANANANANANANANANA
us-gaap:PreferredStockDividendsIncomeStatementImpact ███████▁0.1370.1380.1370.1380.1380.1380.1390.029NANANANA
us-gaap:ProfitLoss ███▁▄▂▇▇▇▇▇▇76.458105.50788.441-392.933-144.559-289.47769.2749.64821.38818.02814.38712.805
us-gaap:RevenueFromContractWithCustomerIncludingAssessedTax ▆▇▇█▇██▂▁▁▁▁203.86233.415219.736243.708239.067243.795255.61854.10843.49237.81633.14528.453
us-gaap:Revenues ▆▇▇█▇██▂▁▁▁▁203.86233.415219.736243.708239.067243.795255.61854.10843.49237.81633.14528.453
  2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
  2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
us-gaap:Assets ▇▇▇▇▇███▁▁▁▁5610.9125673.5045715.0555781.3596282.8786445.5046769.0096668.42747.70542.25839.40843.09
us-gaap:Liabilities █████▇▇▇▁▁▁▁3192.6263188.0133191.8733192.4043139.4642922.4742796.652632.87716.84417.13216.32421.647
us-gaap:LiabilitiesAndStockholdersEquity ▇▇▇▇▇███▁▁▁▁5610.9125673.5045715.0555781.3596282.8786445.5046769.0096668.42747.70542.25839.40843.09
us-gaap:StockholdersEquity ▅▅▅▅▆▇██▁2418.2862485.4912523.1822588.9553143.4143523.033972.3594035.5530.861NANANA
  2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
us-gaap:AssetsCurrent ▅▆▆█▆▆▆▆▁▁▁▂93.931108.008100.669151.372108.558109.224115.367116.7192.9094.4426.27114.637
us-gaap:CashAndCashEquivalentsAtCarryingValue ▁▆█0.642.3932.997NA1.235NA7.7911.9682.822NANANA
us-gaap:CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents ▁▆█▃▃0.642.3932.9971.2351.235NA7.7911.9682.8224.2465.314.482
us-gaap:AccountsReceivableNetCurrent ▁▆▆▅█0.8393.5993.3923.0954.574NANANANANANANA
us-gaap:OtherAssetsCurrent ▄▂▂▃▄▇▇█▁1.4790.5210.6451.2511.723.1023.0923.5150.087NANANA
  2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
 us-gaap:AssetsNoncurrent us-gaap:EquityMethodInvestmentNonconsolidatedInvestee us-gaap:EquityMethodInvestmentNonconsolidatedInvesteeOrGroupOfInvestees1652.196NANANA1660.401NANANANANANANA
us-gaap:PropertyPlantAndEquipmentGross ▃▃▂▁▂▁█▆3411.7523386.7343353.6883304.9043361.0583276.6573788.1343667.327NANANANA
us-gaap:AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment █▆▃▁▂157.708130.845104.04576.63987.648NANANANANANANA
us-gaap:AmortizationOfIntangibleAssets ▅▅▅▅▅█▃▁17.66117.817.60617.60517.83228.8638.5341.781NANANANA
us-gaap:PropertyPlantAndEquipmentNet ▂▂▁▁▂▁█▇3254.0443255.8893249.6433228.2653273.413215.9783744.3363659.677NANANANA
us-gaap:InvestmentsInAffiliatesSubsidiariesAssociatesAndJointVentures ▅▅▅▅▅▅██▁722.478728.325729.823716.778709.639672.311186.1611153.94343.492NANANA
us-gaap:FiniteLivedIntangibleAssetsNet ▁▃▅▆██1427.4471445.1081462.9081480.5141498.1191496.951NANANANANANA
us-gaap:DeferredTaxAssetsLiabilitiesNet 103.402NANANA103.23135.53NA3.6811.304NANANA
us-gaap:OtherAssetsNoncurrent ▁▂▄▄█9.6110.57811.43311.93114.46NANANANANANANA
  2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
us-gaap:AccountsPayableCurrent ▃▅▅▆▂█▇▆▁9.49519.9219.82221.6626.64532.56927.00322.8710.028NANANA
us-gaap:AccruedLiabilitiesCurrent ▆▃▆▅██▇▆▁74.94736.53572.28457.139104.18896.94482.07773.4480.407NANA0.843
us-gaap:LiabilitiesCurrent ▃▂▃▃▇█▇▄▁▁▁▁94.00561.25998.14583.56242.084259.628237.504118.06216.84414.16214.13320.789
us-gaap:OtherAccruedLiabilitiesCurrent ▅▅▆▇█▅▇▄▁4.0254.8535.6375.9237.3414.1056.7613.7850.407NANANA
us-gaap:OtherLiabilitiesCurrent █▁▃▂▃5.7012.3753.3253.0843.105NANANANANANANA
  2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
 us-gaap:LiabilitiesNoncurrent us-gaap:EquityMethodInvestmentNonconsolidatedInvestee us-gaap:EquityMethodInvestmentNonconsolidatedInvesteeOrGroupOfInvestees5.225NANANA5.521NANANANANANANA
us-gaap:LongTermDebt ▇█▇▇▁3091.6263121.8173088.7853103.7622892.249NANANANANANANA
us-gaap:LongTermDebtNoncurrent ▇█▇▇▁3091.6263121.8173088.7853103.7622892.249NANANANANANANA
 us-gaap:MinorityInterest us-gaap:EquityMethodInvestmentNonconsolidatedInvestee us-gaap:EquityMethodInvestmentNonconsolidatedInvesteeOrGroupOfInvestees169.218NANANA175.021NANANANANANANA
us-gaap:OtherLiabilitiesNoncurrent █▁▁▁▂6.9954.9374.9435.0825.131NANANANANANANA
  2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
us-gaap:StockholdersEquity ▅▅▅▅▆▇██▁2418.2862485.4912523.1822588.9553143.4143523.033972.3594035.5530.861NANANA
us-gaap:CommonStockValue ▁▁▁▄█4.7664.7664.7654.7944.84NANANANANANANA
us-gaap:AdditionalPaidInCapital ▁▃▄▆█2877.6123021.2753164.4743318.6593480.139NANANANANANANA
us-gaap:RetainedEarningsAccumulatedDeficit ▆▄▃▁█-464.092-540.55-646.057-734.498-341.565NANANANANANANA
 us-gaap:MinorityInterest us-gaap:EquityMethodInvestmentNonconsolidatedInvestee us-gaap:EquityMethodInvestmentNonconsolidatedInvesteeOrGroupOfInvestees169.218NANANA175.021NANANANANANANA
  2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
us-gaap:NetCashProvidedByUsedInOperatingActivities ▇▆█▄▇▆▆▃▁▁▁▁206.493184.742241.427120.72192.515177.708182.57769.58725.99122.94211.35623.242
us-gaap:NetCashProvidedByUsedInInvestingActivities █▇▆▆▁▃▁▆-31.225-44.665-65.964-77.377-169.382-134.892-160.223-61.178NANANANA
us-gaap:NetCashProvidedByUsedInFinancingActivities ▁▃▁▇▇▆██▇▇██-177.021-140.681-172.466-44.578-21.898-50.607-16.531-9.263-27.415-23.996-20.538-14.747
us-gaap:CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect ▄▄▆▄▅▂▇▄▄▄▁█-1.753-0.6042.997-1.2351.235-7.7915.823-0.854-1.424-1.054-9.1828.495
  2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
us-gaap:AmortizationOfFinancingCosts █▇▇▇▇▇▆▂▁▁1.2041.1091.11.091.061.0210.8510.2510.0580.072NANA
us-gaap:DeferredIncomeTaxExpenseBenefit ▇██▁▂▂█▆21.25434.98331.92-88.328-67.701-62.26830.419-2.377NANANANA
us-gaap:IncreaseDecreaseInAccountsPayable ▂▅▄█▁▅▃▄-5.0380.744-1.1196.614-6.1270.994-3.175-1.454NANANANA
us-gaap:IncreaseDecreaseInAccountsReceivable ▆█▇▁▇███-0.295-0.05-0.091-0.998-0.173-0.003-0.0270.018NANANANA
us-gaap:NetCashProvidedByUsedInOperatingActivities ▇▆█▄▇▆▆▃▁▁▁▁206.493184.742241.427120.72192.515177.708182.57769.58725.99122.94211.35623.242
us-gaap:ProfitLoss ███▁▄▂▇▇▇▇▇▇76.458105.50788.441-392.933-144.559-289.47769.2749.64821.38818.02814.38712.805
us-gaap:ShareBasedCompensation ▁▁▁▁█▇█▄▃▃▃▃3.0653.6782.6973.33820.42220.12921.54311.4238.7928.5749.1118.635
  2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
us-gaap:NetCashProvidedByUsedInInvestingActivities █▇▆▆▁▃▁▆-31.225-44.665-65.964-77.377-169.382-134.892-160.223-61.178NANANANA
us-gaap:PaymentsToAcquirePropertyPlantAndEquipment ▂▃▄▅█▇▇▁19.95334.04149.27854.65996.46281.71581.5297.677NANANANA
  2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
us-gaap:NetCashProvidedByUsedInFinancingActivities ▁▃▁▇▇▆██▇▇██-177.021-140.681-172.466-44.578-21.898-50.607-16.531-9.263-27.415-23.996-20.538-14.747
us-gaap:PaymentsOfDividendsCommonStock ███████▂▂▁▁▁146.581146.664147.519148.876155.331154.147152.08230.54326.81723.27620.10913.964
us-gaap:PaymentsForRepurchaseOfCommonStock ▁▁▂▂█0.00.08.88915.824100.0NANANANANANANA
  2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31

Common Stock Value

us-gaap:CommonStockValue

us-gaap:CommonStockValue


Common
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-31
Value4774000.04769000.04766000.04766000.04765000.04794000.04840000.0
Percentage of CommonStockValue100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets0.10.10.10.10.10.10.1

Common Stock Shares Issued

us-gaap:CommonStockSharesIssued

us-gaap:CommonStockSharesIssued


Common
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-31
Value4774764764764764790.4840420.5033780.5068475060.0
Percentage of CommonStockSharesIssued100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0

Preferred Stock Shares Issued

us-gaap:PreferredStockSharesIssued us-gaap:StatementClassOfStock

us-gaap:PreferredStockSharesIssued

us-gaap:PreferredClassA


Preferred
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-31
Value10000.010000.010000.010000.010000.010000.010000.010000.010.010000.00
Percentage of PreferredStockSharesIssued100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0

Common Stock Shares Authorized

us-gaap:CommonStockSharesAuthorized

us-gaap:CommonStockSharesAuthorized


Common
Period End2020-12-312020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-31
Value2000200020002.02.02.020000.0
Percentage of CommonStockSharesAuthorized100.0100.0100.0100.0100.0100.0100.00.0

Preferred Stock Shares Authorized

us-gaap:PreferredStockSharesAuthorized

us-gaap:PreferredStockSharesAuthorized


Preferred
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312019-03-122018-12-31
Value1001001001001001001001000.11001000.0
Percentage of PreferredStockSharesAuthorized100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0

us-gaap:PreferredStockSharesAuthorized us-gaap:StatementClassOfStock

us-gaap:PreferredClassA


Preferred
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-31
Value0.0120.0120.0120.0120.0120.0120.0120.0121.2e-050.0120.0
Percentage of PreferredStockSharesAuthorized0.00.00.00.00.00.00.00.00.00.00.0

Common Stock Shares Outstanding

us-gaap:CommonStockSharesOutstanding

us-gaap:CommonStockSharesOutstanding


Common
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-31
Value4774764764764764790.4840420.5033780.5068475060.0
Percentage of CommonStockSharesOutstanding100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0

us-gaap:CommonStockSharesOutstanding us-gaap:StatementEquityComponents

us-gaap:CommonStock


Common
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-31
Value4764764760.4793850.4840425035060.506641
Percentage of CommonStockSharesOutstanding100.0100.0100.00.1100.0100000.0100000.00.1

Weighted Average Number Of Diluted Shares Outstanding

us-gaap:WeightedAverageNumberOfDilutedSharesOutstanding

us-gaap:WeightedAverageNumberOfDilutedSharesOutstanding


Weighted
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-312017-09-30
Value479479478478483506507254186186186191
Percentage of WeightedAverageNumberOfDilutedSharesOutstanding100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Weighted Average Number Of Shares Outstanding Basic

us-gaap:WeightedAverageNumberOfSharesOutstandingBasic

us-gaap:WeightedAverageNumberOfSharesOutstandingBasic


Weighted
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-312017-09-30
Value4774764764764835065062530.186208186186186
Percentage of WeightedAverageNumberOfSharesOutstandingBasic100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Antidilutive Securities Excluded From Computation Of Earnings Per Share Amount

us-gaap:AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount us-gaap:AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareByAntidilutiveSecurities

us-gaap:AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount

us-gaap:RestrictedStockUnitsRSU


Antidilutive
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-09-30
Value341000.0397000.02995000.01734000.098000.034000.0
Percentage of AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount100.0100.0100.0100.0100.0100.0

Earnings Per Share Basic

us-gaap:EarningsPerShareBasic

us-gaap:EarningsPerShareBasic


Earnings
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-30
Value0.170.170.160.220.19-0.81-0.29-0.570.140.040.10.090.07
Percentage of EarningsPerShareBasic100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Earnings Per Share Diluted

us-gaap:EarningsPerShareDiluted

us-gaap:EarningsPerShareDiluted


Earnings
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-31
Value0.170.170.160.220.18-0.81-0.29-0.570.140.04
Percentage of EarningsPerShareDiluted100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Earnings Per Share Basic And Diluted

us-gaap:EarningsPerShareBasicAndDiluted

us-gaap:EarningsPerShareBasicAndDiluted


Earnings
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-30
Value0.210.18-0.81-0.29-0.570.140.040.10.090.070.070.030.02-0.01
Percentage of EarningsPerShareBasicAndDiluted100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Allocated Share Based Compensation Expense

us-gaap:AllocatedShareBasedCompensationExpense

us-gaap:AllocatedShareBasedCompensationExpense


Allocated
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-31
Value4.0123.0653.6782.6973.33820202111
Percentage of AllocatedShareBasedCompensationExpense100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax0.01.51.61.21.48.58.38.421.1

us-gaap:AllocatedShareBasedCompensationExpense us-gaap:AwardType

am:AmcLtip


Allocated
Period End2021-06-302020-06-30
Value2.81.3
Percentage of AllocatedShareBasedCompensationExpense0.048.2
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax0.00.6
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax am:AmcLtip0.00.0

amgp:AmcLtip


Allocated
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-30
Value2.32.62.31.31.4-0.11.40.8
Percentage of AllocatedShareBasedCompensationExpense57.384.862.548.241.9-0.57.03.7
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax0.01.31.00.60.6-0.00.60.3
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax amgp:AmcLtip0.00.00.00.00.00.00.00.0

amgp:PerformanceShareUnitAwardsBasedOnReturnOnInvestedCapital


Allocated
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-06-302019-03-31
Value0.70.10.10.0780.0780.1630.0
Percentage of AllocatedShareBasedCompensationExpense17.43.32.72.92.30.80.0
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax0.00.00.00.00.00.10.0
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax amgp:PerformanceShareUnitAwardsBasedOnReturnOnInvestedCapital0.00.00.00.00.00.00.0

us-gaap:AllocatedShareBasedCompensationExpense us-gaap:ConsolidatedEntities

amgp:AnteroMidstreamPartners


Allocated
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-31
Value1.10.71.21.31.51.30.82.80.5
Percentage of AllocatedShareBasedCompensationExpense27.422.832.648.244.96.44.013.04.4
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax0.00.30.50.60.60.50.30.00.0
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax amgp:AnteroMidstreamPartners0.00.00.00.00.00.00.00.00.0

us-gaap:AllocatedShareBasedCompensationExpense us-gaap:ConsolidationItems

us-gaap:CorporateNonSegment


Allocated
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-31
Value0.2270.2260.4250.00.2518181810
Percentage of AllocatedShareBasedCompensationExpense5.77.411.60.07.589.891.185.194.8
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax0.00.10.20.00.17.77.57.220.0
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax us-gaap:CorporateNonSegment0.00.00.00.00.00.00.00.00.0

us-gaap:AllocatedShareBasedCompensationExpense us-gaap:ConsolidationItems, us-gaap:StatementBusinessSegments

us-gaap:OperatingSegments, amgp:GatheringAndCompression


Allocated
Period End2021-03-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-31
Value2.7252.7322.2662.5331.551.3482.2860.377
Percentage of AllocatedShareBasedCompensationExpense67.974.384.075.97.66.710.63.3
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax0.01.21.01.00.60.60.90.7
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax us-gaap:OperatingSegments amgp:GatheringAndCompression0.00.00.00.00.00.00.00.0

us-gaap:OperatingSegments, amgp:WaterHandling


Allocated
Period End2021-03-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-31
Value1.060.5210.4310.5550.5410.450.9260.213
Percentage of AllocatedShareBasedCompensationExpense26.414.216.016.62.62.24.31.9
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax0.00.20.20.20.20.20.40.4
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax us-gaap:OperatingSegments amgp:WaterHandling0.00.00.00.00.00.00.00.0

us-gaap:AllocatedShareBasedCompensationExpense us-gaap:RelatedPartyTransactionsByRelatedParty

am:AnteroResourcesCorporation


Allocated
Period End2021-06-302020-06-30
Value0.41.3
Percentage of AllocatedShareBasedCompensationExpense0.048.2
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax0.00.6
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax am:AnteroResourcesCorporation0.00.0

Gains Losses On Extinguishment Of Debt

us-gaap:GainsLossesOnExtinguishmentOfDebt

us-gaap:GainsLossesOnExtinguishmentOfDebt


Gains
Period End2021-06-30
Value-20.701
Percentage of GainsLossesOnExtinguishmentOfDebt100.0
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax0.0

us-gaap:GainsLossesOnExtinguishmentOfDebt dei:LegalEntity, us-gaap:CreditFacility

am:AnteroMidstreamPartnersAndAnteroMidstreamFinanceCorp, am:SeniorNotesDue2024Bearing5.375Rate


Gains
Period End2021-06-08
Value21
Percentage of GainsLossesOnExtinguishmentOfDebt0.0
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax0.0
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax am:AnteroMidstreamPartnersAndAnteroMidstreamFinanceCorp am:SeniorNotesDue2024Bearing5.375Rate0.0

General And Administrative Expense

us-gaap:GeneralAndAdministrativeExpense

us-gaap:GeneralAndAdministrativeExpense


General
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-31
Value141713131213333034193.1832.2292.3980.9250.2790.6153.2032.1040.4240.2050.1450.04
Percentage of GeneralAndAdministrativeExpense100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax0.00.06.45.75.75.613.812.513.536.67.35.97.23.30.00.00.00.00.00.00.00.0

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

us-gaap:IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest

us-gaap:IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest


Income
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-31
Value10811198140120-537.718-212.799-351.745997.2713126211814102.4941.1267.1324.6022.5861.81
Percentage of IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax0.00.048.460.254.8-220.6-89.0-144.339.013.472.371.365.266.40.00.00.00.00.00.00.00.0

Income Tax Expense Benefit

us-gaap:IncomeTaxExpenseBenefit

us-gaap:IncomeTaxExpenseBenefit


Income
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-31
Value2828223431-144.785-68.24-62.268302.377108.9177.2316.0888.9247.1575.7554.4252.8561.8251.0360.702
Percentage of IncomeTaxExpenseBenefit100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax0.00.010.915.014.5-59.4-28.5-25.511.94.423.223.621.821.40.00.00.00.00.00.00.00.0

Income Taxes Paid Net

us-gaap:IncomeTaxesPaidNet

us-gaap:IncomeTaxesPaidNet


Income
Period End2021-06-302021-03-312020-12-312020-09-302019-12-312019-09-302018-12-312018-09-30
Value0.0160.2950.00.0780.08.9249.004
Percentage of IncomeTaxesPaidNet0.0100.0100.00.0100.00.0100.0100.0
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax0.00.00.10.00.00.020.523.8

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-43505000.0-42866000.0-39564000.0-34501000.0-35311000.0-37631000.0-36530000.0-36134000.0-31521000.0-6217000.0-54000.0-68000.0-18000.0
Percentage of InterestIncomeExpenseNet100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax0.00.0-19.4-14.8-16.1-15.4-15.3-14.8-12.3-11.5-0.1-0.2-0.1

Interest Paid Net

us-gaap:InterestPaidNet

us-gaap:InterestPaidNet


Interest
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-31
Value32585.306607.056677.945431119
Percentage of InterestPaidNet100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax0.00.02.626.03.227.73.318.04.735.6

Net Income Loss Available To Common Stockholders Basic

us-gaap:NetIncomeLossAvailableToCommonStockholdersBasic

us-gaap:NetIncomeLossAvailableToCommonStockholdersBasic


Net
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-30
Value80837610588-393.071-144.697-289.615699.619171713125.1232.978-1.621
Percentage of NetIncomeLossAvailableToCommonStockholdersBasic100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax0.00.037.445.140.2-161.3-60.5-118.827.017.840.646.141.943.60.00.00.0

Operating Expenses

us-gaap:OperatingExpenses

us-gaap:OperatingExpenses


Operating
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-31
Value8190888185762431577138431110119.568.9418.93212100.4240.2050.1450.04
Percentage of OperatingExpenses100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax0.00.043.635.038.7313.0180.6237.054.080.427.528.634.733.60.00.00.00.00.00.00.00.0

us-gaap:OperatingExpenses us-gaap:ConsolidationItems

us-gaap:CorporateNonSegment


Operating
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-31
Value0.6441.6012.0441.9951.5912.522182017
Percentage of OperatingExpenses0.81.82.32.41.90.35.13.314.640.5
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax0.00.01.00.90.71.09.37.87.932.6
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax us-gaap:CorporateNonSegment0.00.00.00.00.00.00.00.00.00.0

us-gaap:OperatingExpenses us-gaap:ConsolidationItems, us-gaap:StatementBusinessSegments

us-gaap:OperatingSegments, am:GatheringAndCompression


Operating
Period End2021-06-302020-06-30
Value4036
Percentage of OperatingExpenses49.242.5
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax0.016.5
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax us-gaap:OperatingSegments am:GatheringAndCompression0.00.0

us-gaap:OperatingSegments, am:WaterHandling


Operating
Period End2021-06-302020-06-30
Value4047
Percentage of OperatingExpenses50.055.6
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax0.021.5
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax us-gaap:OperatingSegments am:WaterHandling0.00.0

us-gaap:OperatingSegments, amgp:GatheringAndCompression


Operating
Period End2021-03-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-31
Value4540366093232356.892
Percentage of OperatingExpenses50.349.142.579.97.65.725.615.8
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax0.017.216.5250.113.713.513.812.7
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax us-gaap:OperatingSegments amgp:GatheringAndCompression0.00.00.00.00.00.00.00.0

us-gaap:OperatingSegments, amgp:WaterHandling


Operating
Period End2021-03-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-31
Value4339471503765258218
Percentage of OperatingExpenses47.948.555.619.887.391.059.843.6
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax0.016.921.561.9157.6215.732.335.1
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax us-gaap:OperatingSegments amgp:WaterHandling0.00.00.00.00.00.00.00.0

Operating Income Loss

us-gaap:OperatingIncomeLoss

us-gaap:OperatingIncomeLoss


Operating
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-30
Value151133114151134-519.164-192.603-334.08911710312721-9.5614102.494
Percentage of OperatingIncomeLoss100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax0.00.056.465.061.3-213.0-80.6-137.046.019.672.571.465.3-33.60.00.00.0

us-gaap:OperatingIncomeLoss us-gaap:ConsolidationItems

us-gaap:CorporateNonSegment


Operating
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-31
Value-0.644-1.601-2.044-1.995-1.591-2.5-22.164-18.958-20.117-17.625
Percentage of OperatingIncomeLoss-0.4-1.2-1.8-1.3-1.20.511.55.7-17.1-166.1
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax0.00.0-1.0-0.9-0.7-1.0-9.3-7.8-7.9-32.6
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax us-gaap:CorporateNonSegment0.00.00.00.00.00.00.00.00.00.0

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

us-gaap:OperatingSegments, am:GatheringAndCompression


Operating
Period End2021-06-302020-06-30
Value143128
Percentage of OperatingIncomeLoss94.795.4
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax0.058.5
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax us-gaap:OperatingSegments am:GatheringAndCompression0.00.0

us-gaap:OperatingSegments, am:WaterHandling


Operating
Period End2021-06-302020-06-30
Value8.6627.736
Percentage of OperatingIncomeLoss5.75.7
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax0.03.5
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax us-gaap:OperatingSegments am:WaterHandling0.00.0

us-gaap:OperatingSegments, amgp:GatheringAndCompression


Operating
Period End2021-03-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-31
Value130140128-455.58812112613126
Percentage of OperatingIncomeLoss97.592.795.487.8-63.3-37.8111.6246.4
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax0.060.358.5-186.951.051.851.348.3
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax us-gaap:OperatingSegments amgp:GatheringAndCompression0.00.00.00.00.00.00.00.0

us-gaap:OperatingSegments, amgp:WaterHandling


Operating
Period End2021-03-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-31
Value4.877137.736-61.076-292.402-441.4926.4962.092
Percentage of OperatingIncomeLoss3.78.65.711.8151.8132.15.519.7
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax0.05.63.5-25.1-122.3-181.12.53.9
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax us-gaap:OperatingSegments amgp:WaterHandling0.00.00.00.00.00.00.00.0

Other Nonoperating Income Expense

us-gaap:OtherNonoperatingIncomeExpense

us-gaap:OtherNonoperatingIncomeExpense


Other
Period End2021-06-302020-06-30
Value-42691000.0-14364000.0
Percentage of OtherNonoperatingIncomeExpense100.0100.0
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax0.0-6.5

Preferred Stock Dividends Income Statement Impact

us-gaap:PreferredStockDividendsIncomeStatementImpact

us-gaap:PreferredStockDividendsIncomeStatementImpact


Preferred
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-31
Value137000.0138000.0137000.0138000.0137000.0138000.0138000.0138000.0139000.029000.0
Percentage of PreferredStockDividendsIncomeStatementImpact100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax0.00.00.10.10.10.10.10.10.10.1

Profit Loss

us-gaap:ProfitLoss

us-gaap:ProfitLoss


Profit
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-31
Value80837610588-392.933-144.559-289.477699.648211814125.9072.978-3.261-3.2994.276
Percentage of ProfitLoss100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax0.00.037.545.240.2-161.2-60.5-118.727.117.849.247.743.445.00.00.00.00.00.0

us-gaap:ProfitLoss us-gaap:StatementEquityComponents

us-gaap:RetainedEarnings


Profit
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-09-302019-06-30
Value808310588-392.933-289.47769
Percentage of ProfitLoss100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax0.00.045.240.2-161.2-118.727.1
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax us-gaap:RetainedEarnings0.00.00.00.00.00.00.0

Revenue From Contract With Customer Including Assessed Tax

us-gaap:RevenueFromContractWithCustomerIncludingAssessedTax

us-gaap:RevenueFromContractWithCustomerIncludingAssessedTax


Revenue
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value2032332192432392432555443373328
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

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

us-gaap:OperatingSegments, am:AnteroResourcesCorporation, am:GatheringAndCompression


Revenue
Period End2021-06-302020-06-30
Value192173
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax0.079.2
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax0.079.2
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax us-gaap:OperatingSegments am:AnteroResourcesCorporation am:GatheringAndCompression100.0100.0

us-gaap:OperatingSegments, am:AnteroResourcesCorporation, am:WaterHandling


Revenue
Period End2021-06-302020-06-30
Value5763
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax0.028.8
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax0.028.8
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax us-gaap:OperatingSegments am:AnteroResourcesCorporation am:WaterHandling100.0100.0

us-gaap:OperatingSegments, am:ThirdPartyCustomers, am:WaterHandling


Revenue
Period End2021-06-30
Value0.07
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax0.0
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax0.0
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax us-gaap:OperatingSegments am:ThirdPartyCustomers am:WaterHandling100.0

us-gaap:OperatingSegments, amgp:AnteroResourcesCorporation, amgp:GatheringAndCompression


Revenue
Period End2021-03-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-31
Value18519017316316517516833
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax0.081.579.266.969.272.166.162.0
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax0.081.579.266.969.272.166.162.0
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax us-gaap:OperatingSegments amgp:AnteroResourcesCorporation amgp:GatheringAndCompression100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OperatingSegments, amgp:AnteroResourcesCorporation, amgp:WaterHandling


Revenue
Period End2021-03-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-31
Value5661639891969522
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax0.026.128.840.338.339.837.241.3
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax0.026.128.840.338.339.837.241.3
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax us-gaap:OperatingSegments amgp:AnteroResourcesCorporation amgp:WaterHandling100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OperatingSegments, amgp:ThirdPartyCustomers, amgp:WaterHandling


Revenue
Period End2021-03-312019-12-312019-09-302019-06-302019-03-31
Value0.0250.00.00.0460.004
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax0.00.00.00.00.0
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax0.00.00.00.00.0
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax us-gaap:OperatingSegments amgp:ThirdPartyCustomers amgp:WaterHandling100.00.00.0100.0100.0

us-gaap:RevenueFromContractWithCustomerIncludingAssessedTax us-gaap:ContractWithCustomerBasisOfPricing, us-gaap:StatementBusinessSegments

am:ServiceFeeContract, am:WaterHandling


Revenue
Period End2021-06-302020-06-30
Value3.6122.709
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax0.01.2
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax0.01.2
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax am:ServiceFeeContract am:WaterHandling100.0100.0

amgp:ServiceFeeContract, amgp:WaterHandling


Revenue
Period End2021-03-312020-12-312020-09-302020-06-302020-03-31
Value3.923.7572.862.7091.421
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax0.01.81.21.20.6
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax0.01.81.21.20.6
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax amgp:ServiceFeeContract amgp:WaterHandling100.0100.0100.0100.0100.0

us-gaap:FixedPriceContract, am:GatheringAndCompression


Revenue
Period End2021-06-302020-06-30
Value192185
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax0.084.6
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax0.084.6
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax us-gaap:FixedPriceContract am:GatheringAndCompression100.0100.0

us-gaap:FixedPriceContract, am:WaterHandling


Revenue
Period End2021-06-302020-06-30
Value3736
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax0.016.8
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax0.016.8
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax us-gaap:FixedPriceContract am:WaterHandling100.0100.0

us-gaap:FixedPriceContract, amgp:GatheringAndCompression


Revenue
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-31
Value18519620218517516517516833
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax0.096.286.684.671.969.272.166.162.0
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax0.096.286.684.671.969.272.166.162.0
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax us-gaap:FixedPriceContract amgp:GatheringAndCompression100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:FixedPriceContract, amgp:WaterHandling


Revenue
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-31
Value371540366552615513
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax0.07.617.316.827.022.225.021.724.4
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax0.07.617.316.827.022.225.021.724.4
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax us-gaap:FixedPriceContract amgp:WaterHandling100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:TimeAndMaterialsContract, am:WaterHandling


Revenue
Period End2021-06-302020-06-30
Value1623
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax0.010.8
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax0.010.8
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax us-gaap:TimeAndMaterialsContract am:WaterHandling100.0100.0

us-gaap:TimeAndMaterialsContract, amgp:WaterHandling


Revenue
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-31
Value15181723303835399.149
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax0.08.97.610.812.716.014.715.616.9
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax0.08.97.610.812.716.014.715.616.9
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax us-gaap:TimeAndMaterialsContract amgp:WaterHandling100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:RevenueFromContractWithCustomerIncludingAssessedTax us-gaap:MajorCustomers

am:AnteroResourcesCorporation


Revenue
Period End2021-06-302020-06-30
Value250237
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax0.0108.0
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax0.0108.0
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax am:AnteroResourcesCorporation100.0100.0

am:ThirdPartyCustomers


Revenue
Period End2021-06-30
Value0.07
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax0.0
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax0.0
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax am:ThirdPartyCustomers100.0

amgp:AnteroResourcesCorporation


Revenue
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-31
Value24122125123726125627226455
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax0.0108.7107.6108.0107.2107.5111.8103.3103.3
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax0.0108.7107.6108.0107.2107.5111.8103.3103.3
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax amgp:AnteroResourcesCorporation100.0100.0100.0100.0100.0100.0100.0100.0100.0

amgp:ThirdPartyCustomers


Revenue
Period End2021-03-312019-12-312019-09-302019-06-302019-03-31
Value0.0250.00.00.0460.004
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax0.00.00.00.00.0
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax0.00.00.00.00.0
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax amgp:ThirdPartyCustomers100.00.00.0100.0100.0

us-gaap:RevenueFromContractWithCustomerIncludingAssessedTax us-gaap:ProductOrService

am:NaturalGasGatheringTransportationMarketingAndProcessingAffiliate


Revenue
Period End2021-06-302020-06-30
Value192173
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax0.079.2
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax0.079.2
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax am:NaturalGasGatheringTransportationMarketingAndProcessingAffiliate100.0100.0

am:NaturalGasWaterHandlingAndTreatment


Revenue
Period End2021-06-30
Value0.07
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax0.0
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax0.0
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax am:NaturalGasWaterHandlingAndTreatment100.0

am:NaturalGasWaterHandlingAndTreatmentAffiliate


Revenue
Period End2021-06-302020-06-30
Value5763
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax0.028.8
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax0.028.8
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax am:NaturalGasWaterHandlingAndTreatmentAffiliate100.0100.0

amgp:NaturalGasGatheringTransportationMarketingAndProcessingAffiliate


Revenue
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-31
Value18518419017316316517516833
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax0.090.381.579.266.969.272.166.162.0
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax0.090.381.579.266.969.272.166.162.0
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax amgp:NaturalGasGatheringTransportationMarketingAndProcessingAffiliate100.0100.0100.0100.0100.0100.0100.0100.0100.0

amgp:NaturalGasWaterHandlingAndTreatment


Revenue
Period End2021-03-312019-12-312019-09-302019-06-302019-03-31
Value0.0250.00.00.0460.004
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax0.00.00.00.00.0
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax0.00.00.00.00.0
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax amgp:NaturalGasWaterHandlingAndTreatment100.00.00.0100.0100.0

amgp:NaturalGasWaterHandlingAndTreatmentAffiliate


Revenue
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-31
Value563761639891969522
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax0.018.326.128.840.338.339.837.241.3
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax0.018.326.128.840.338.339.837.241.3
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax amgp:NaturalGasWaterHandlingAndTreatmentAffiliate100.0100.0100.0100.0100.0100.0100.0100.0100.0

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

am:Compression, am:GatheringAndCompression


Revenue
Period End2021-06-302020-06-30
Value4948
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax0.022.1
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax0.022.1
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax am:Compression am:GatheringAndCompression100.0100.0

am:FreshWaterDelivery, am:WaterHandling


Revenue
Period End2021-06-302020-06-30
Value3736
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax0.016.8
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax0.016.8
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax am:FreshWaterDelivery am:WaterHandling100.0100.0

am:GatheringHighPressure, am:GatheringAndCompression


Revenue
Period End2021-06-302020-06-30
Value5151
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax0.023.5
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax0.023.5
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax am:GatheringHighPressure am:GatheringAndCompression100.0100.0

am:GatheringLowPressure, am:GatheringAndCompression


Revenue
Period End2021-06-302020-06-30
Value9185
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax0.039.0
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax0.039.0
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax am:GatheringLowPressure am:GatheringAndCompression100.0100.0

am:OtherFluidHandling, am:WaterHandling


Revenue
Period End2021-06-302020-06-30
Value2026
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax0.012.0
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax0.012.0
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax am:OtherFluidHandling am:WaterHandling100.0100.0

amgp:Compression, amgp:GatheringAndCompression


Revenue
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-31
Value48495148454343428.424
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax0.024.322.222.118.518.217.916.615.6
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax0.024.322.222.118.518.217.916.615.6
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax amgp:Compression amgp:GatheringAndCompression100.0100.0100.0100.0100.0100.0100.0100.0100.0

amgp:FreshWaterDelivery, amgp:WaterHandling


Revenue
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-31
Value371540366552504310
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax0.07.617.316.827.022.220.717.019.9
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax0.07.617.316.827.022.220.717.019.9
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax amgp:FreshWaterDelivery amgp:WaterHandling100.0100.0100.0100.0100.0100.0100.0100.0100.0

amgp:GatheringHighPressure, amgp:GatheringAndCompression


Revenue
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-31
Value50525751484251479.284
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax0.025.824.723.520.117.921.118.717.2
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax0.025.824.723.520.117.921.118.717.2
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax amgp:GatheringHighPressure amgp:GatheringAndCompression100.0100.0100.0100.0100.0100.0100.0100.0100.0

amgp:GatheringLowPressure, amgp:GatheringAndCompression


Revenue
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-31
Value869392858178807815
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax0.046.139.739.033.333.033.130.829.2
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax0.046.139.739.033.333.033.130.829.2
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax amgp:GatheringLowPressure amgp:GatheringAndCompression100.0100.0100.0100.0100.0100.0100.0100.0100.0

amgp:OtherFluidHandling, amgp:WaterHandling


Revenue
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-31
Value19212026323835399.149
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax0.010.78.812.013.316.114.715.616.9
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax0.010.78.812.013.316.114.715.616.9
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax amgp:OtherFluidHandling amgp:WaterHandling100.0100.0100.0100.0100.0100.0100.0100.0100.0

Revenues

us-gaap:Revenues

us-gaap:Revenues


Revenues
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-31
Value2322242032332192432392432555443373328231915117.5564.8072.7311.85
Percentage of Revenues100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax0.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.00.00.00.00.00.00.00.0

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

us-gaap:OperatingSegments, am:GatheringAndCompression


Revenuesus-gaap:
Period End2021-06-302020-06-30
Value183164
Percentage of Revenues78.875.0
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax0.075.0
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax us-gaap:OperatingSegments am:GatheringAndCompression0.00.0

us-gaap:OperatingSegments, am:WaterHandling


Revenuesus-gaap:
Period End2021-06-302020-06-30
Value4954
Percentage of Revenues21.225.0
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax0.025.0
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax us-gaap:OperatingSegments am:WaterHandling0.00.0

us-gaap:OperatingSegments, amgp:GatheringAndCompression


Revenuesus-gaap:
Period End2021-03-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-31
Value17518016415315415916633
Percentage of Revenues78.577.575.063.164.765.465.161.1
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax0.077.575.063.164.765.465.161.1
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax us-gaap:OperatingSegments amgp:GatheringAndCompression0.00.00.00.00.00.00.00.0

us-gaap:OperatingSegments, amgp:WaterHandling


Revenuesus-gaap:
Period End2021-03-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-31
Value4852548984848921
Percentage of Revenues21.522.525.036.935.334.634.938.9
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax0.022.525.036.935.334.634.938.9
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax us-gaap:OperatingSegments amgp:WaterHandling0.00.00.00.00.00.00.00.0

Assets

us-gaap:Assets

us-gaap:Assets


Assets
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-31
Value5540554656105673571557816282644567696668474239432921272817
Percentage of Assets100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:Assets us-gaap:ConsolidationItems

us-gaap:CorporateNonSegment


Assetsus-gaap:
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-31
Value4876120143178249104387.778.102
Percentage of Assets0.91.42.22.53.14.31.70.60.10.1
Percentage of Assets0.91.42.22.53.14.31.70.60.10.1
Percentage of Assets us-gaap:CorporateNonSegment100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

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

us-gaap:OperatingSegments, am:GatheringAndCompression


Assetsus-gaap:
Period End2021-06-302020-06-30
Value43804387
Percentage of Assets79.176.8
Percentage of Assets79.176.8
Percentage of Assets us-gaap:OperatingSegments am:GatheringAndCompression100.0100.0

us-gaap:OperatingSegments, am:WaterHandling


Assetsus-gaap:
Period End2021-06-302020-06-30
Value11111149
Percentage of Assets20.120.1
Percentage of Assets20.120.1
Percentage of Assets us-gaap:OperatingSegments am:WaterHandling100.0100.0

us-gaap:OperatingSegments, amgp:GatheringAndCompression


Assetsus-gaap:
Period End2021-03-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-31
Value43474383438743474891476849164818
Percentage of Assets78.477.376.875.277.874.072.672.3
Percentage of Assets78.477.376.875.277.874.072.672.3
Percentage of Assets us-gaap:OperatingSegments amgp:GatheringAndCompression100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OperatingSegments, amgp:WaterHandling


Assetsus-gaap:
Period End2021-03-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-31
Value11221146114911841287163918441841
Percentage of Assets20.220.220.120.520.525.427.227.6
Percentage of Assets20.220.220.120.520.525.427.227.6
Percentage of Assets us-gaap:OperatingSegments amgp:WaterHandling100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:Assets us-gaap:EquityMethodInvestmentNonconsolidatedInvestee

us-gaap:EquityMethodInvestmentNonconsolidatedInvesteeOrGroupOfInvestees


Assetsus-gaap:
Period End2020-12-312019-12-31
Value17371722
Percentage of Assets31.027.4
Percentage of Assets31.027.4
Percentage of Assets us-gaap:EquityMethodInvestmentNonconsolidatedInvesteeOrGroupOfInvestees100.0100.0

us-gaap:Assets us-gaap:StatementBusinessSegments

amgp:GatheringAndCompression


Assetsus-gaap:
Period End2020-12-312019-12-31
Value43644891
Percentage of Assets77.877.8
Percentage of Assets77.877.8
Percentage of Assets amgp:GatheringAndCompression100.0100.0

amgp:WaterHandling


Assetsus-gaap:
Period End2020-12-312019-12-31
Value11251287
Percentage of Assets20.120.5
Percentage of Assets20.120.5
Percentage of Assets amgp:WaterHandling100.0100.0

Liabilities

us-gaap:Liabilities

us-gaap:Liabilities


Liabilities
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-31
Value32123189319231883191319231392922279626321617162114128.137137.1
Percentage of Liabilities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets58.057.556.956.255.955.250.045.341.339.535.340.541.450.247.659.730.148.840.9

Liabilities And Stockholders Equity

us-gaap:LiabilitiesAndStockholdersEquity

us-gaap:LiabilitiesAndStockholdersEquity


Liabilities
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-31
Value5540554656105673571557816282644567696668474239432921272817
Percentage of LiabilitiesAndStockholdersEquity100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:LiabilitiesAndStockholdersEquity us-gaap:EquityMethodInvestmentNonconsolidatedInvestee

us-gaap:EquityMethodInvestmentNonconsolidatedInvesteeOrGroupOfInvestees


Liabilities
Period End2020-12-312019-12-31
Value17371722
Percentage of LiabilitiesAndStockholdersEquity31.027.4
Percentage of Assets31.027.4
Percentage of Assets us-gaap:EquityMethodInvestmentNonconsolidatedInvesteeOrGroupOfInvestees100.0100.0

Stockholders Equity

us-gaap:StockholdersEquity

us-gaap:StockholdersEquity


Stockholders
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-31
Value232823562418248525232588314335233972403530
Percentage of StockholdersEquity100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets42.042.543.143.844.144.850.054.758.760.564.7

us-gaap:StockholdersEquity us-gaap:EquityMethodInvestmentNonconsolidatedInvestee

us-gaap:EquityMethodInvestmentNonconsolidatedInvesteeOrGroupOfInvestees


Stockholders
Period End2020-12-312019-12-31
Value15531507
Percentage of StockholdersEquity64.348.0
Percentage of Assets27.724.0
Percentage of Assets us-gaap:EquityMethodInvestmentNonconsolidatedInvesteeOrGroupOfInvestees89.487.5

us-gaap:StockholdersEquity us-gaap:StatementEquityComponents

us-gaap:AdditionalPaidInCapital


Stockholders
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-31
Value2624273228773021316433183480371538744007
Percentage of StockholdersEquity112.7115.9119.0121.6125.4128.2110.7105.497.599.3
Percentage of Assets47.449.351.353.355.457.455.457.657.260.1
Percentage of Assets us-gaap:AdditionalPaidInCapital0.00.00.00.00.00.00.00.00.00.0

us-gaap:CommonStock


Stockholders
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-31
Value4.7744.7694.7664.7664.7654.7944.845.0345.0685.066
Percentage of StockholdersEquity0.20.20.20.20.20.20.20.10.10.1
Percentage of Assets0.10.10.10.10.10.10.10.10.10.1
Percentage of Assets us-gaap:CommonStock0.00.00.00.00.00.00.00.00.00.0

us-gaap:RetainedEarnings


Stockholders
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-31
Value-300.428-380.651-464.092-540.55-646.057-734.498-341.565-197.0069223
Percentage of StockholdersEquity-12.9-16.2-19.2-21.7-25.6-28.4-10.9-5.62.30.6
Percentage of Assets-5.4-6.9-8.3-9.5-11.3-12.7-5.4-3.11.40.3
Percentage of Assets us-gaap:RetainedEarnings0.00.00.00.00.00.00.00.00.00.0

Assets Current

us-gaap:AssetsCurrent

us-gaap:AssetsCurrent


Assets
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-31
Value9291931081001511081091151162.9094.4426.271145.9872.46811179.826
Percentage of AssetsCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets1.71.61.71.91.82.61.71.71.71.86.110.515.934.020.111.543.459.656.6

us-gaap:AssetsCurrent us-gaap:EquityMethodInvestmentNonconsolidatedInvestee

us-gaap:EquityMethodInvestmentNonconsolidatedInvesteeOrGroupOfInvestees


Assets
Period End2020-12-312019-12-31
Value8561
Percentage of AssetsCurrent90.956.8
Percentage of Assets1.51.0
Percentage of Assets us-gaap:EquityMethodInvestmentNonconsolidatedInvesteeOrGroupOfInvestees4.93.6

Cash And Cash Equivalents At Carrying Value

us-gaap:CashAndCashEquivalentsAtCarryingValue

us-gaap:CashAndCashEquivalentsAtCarryingValue


Cash
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302019-12-312019-06-302019-03-312018-12-31
Value678000.0261000.0640000.02393000.02997000.01235000.07791000.01968000.02822000.0
Percentage of CashAndCashEquivalentsAtCarryingValue100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets0.00.00.00.00.10.00.10.05.9

Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents

us-gaap:CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents

us-gaap:CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents


Cash
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312016-12-31
Value0.6780.2610.642.3932.9971.2351.2357.7911.9682.8224.2465.3145.9879.609
Percentage of CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets0.00.00.00.00.10.00.00.10.05.910.013.433.620.155.3

Accounts Receivable Net Current

us-gaap:AccountsReceivableNetCurrent

us-gaap:AccountsReceivableNetCurrent


Accounts
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-31
Value466000.0227000.0839000.03599000.03392000.03095000.04574000.0
Percentage of AccountsReceivableNetCurrent100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets0.00.00.00.10.10.10.1

Other Assets Current

us-gaap:OtherAssetsCurrent

us-gaap:OtherAssetsCurrent


Other
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-31
Value358000.0966000.01479000.0521000.0645000.01251000.01720000.03102000.03092000.03515000.087000.0
Percentage of OtherAssetsCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets0.00.00.00.00.00.00.00.00.00.10.2

Assets Noncurrent

us-gaap:AssetsNoncurrent us-gaap:EquityMethodInvestmentNonconsolidatedInvestee

us-gaap:AssetsNoncurrent

us-gaap:EquityMethodInvestmentNonconsolidatedInvesteeOrGroupOfInvestees


Assets
Period End2020-12-312019-12-31
Value16521660
Percentage of AssetsNoncurrent100.0100.0
Percentage of Assets29.426.4
Percentage of Assets us-gaap:EquityMethodInvestmentNonconsolidatedInvesteeOrGroupOfInvestees95.196.4

Property Plant And Equipment Gross

us-gaap:PropertyPlantAndEquipmentGross

us-gaap:PropertyPlantAndEquipmentGross


Property
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-31
Value3504343434113386335333043361327637883667
Percentage of PropertyPlantAndEquipmentGross100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets63.361.960.859.758.757.253.550.856.055.0

us-gaap:PropertyPlantAndEquipmentGross us-gaap:PropertyPlantAndEquipmentByType

am:FreshwaterPermanentBuriedPipelines


Property
Period End2021-06-302020-12-31
Value565545
Percentage of PropertyPlantAndEquipmentGross16.116.0
Percentage of Assets10.29.7
Percentage of Assets am:FreshwaterPermanentBuriedPipelines0.00.0

am:FreshwaterSurfacePipelinesAndEquipment


Property
Period End2021-06-302020-12-31
Value5250
Percentage of PropertyPlantAndEquipmentGross1.51.5
Percentage of Assets0.90.9
Percentage of Assets am:FreshwaterSurfacePipelinesAndEquipment0.00.0

am:GatheringPipeLinesAndCompressorStations


Property
Period End2021-06-302020-12-31
Value26722643
Percentage of PropertyPlantAndEquipmentGross76.377.5
Percentage of Assets48.247.1
Percentage of Assets am:GatheringPipeLinesAndCompressorStations0.00.0

amgp:AboveGroundStorageTanks


Property
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-31
Value2.4832.4832.4431.8681.8683.4183.4184.2354.265
Percentage of PropertyPlantAndEquipmentGross0.10.10.10.10.10.10.10.10.1
Percentage of Assets0.00.00.00.00.00.10.10.10.1
Percentage of Assets amgp:AboveGroundStorageTanks0.00.00.00.00.00.00.00.00.0

amgp:FreshwaterPermanentBuriedPipelines


Property
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-31
Value551545538537530602561686670
Percentage of PropertyPlantAndEquipmentGross16.116.015.916.016.017.917.218.118.3
Percentage of Assets10.09.79.59.49.29.68.710.110.1
Percentage of Assets amgp:FreshwaterPermanentBuriedPipelines0.00.00.00.00.00.00.00.00.0

amgp:FreshwaterSurfacePipelinesAndEquipment


Property
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-31
Value515043423748394452
Percentage of PropertyPlantAndEquipmentGross1.51.51.31.31.11.41.21.21.4
Percentage of Assets0.90.90.80.80.60.80.60.70.8
Percentage of Assets amgp:FreshwaterSurfacePipelinesAndEquipment0.00.00.00.00.00.00.00.00.0

amgp:GatheringPipeLinesAndCompressorStations


Property
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-31
Value265326432624257723972375235323902359
Percentage of PropertyPlantAndEquipmentGross77.377.577.576.972.570.771.863.164.3
Percentage of Assets47.847.146.345.141.537.836.535.335.4
Percentage of Assets amgp:GatheringPipeLinesAndCompressorStations0.00.00.00.00.00.00.00.00.0

amgp:HeavyTrucksAndEquipment


Property
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-31
Value5.9195.9195.9195.9196.6236.6176.2454.9414.047
Percentage of PropertyPlantAndEquipmentGross0.20.20.20.20.20.20.20.10.1
Percentage of Assets0.10.10.10.10.10.10.10.10.1
Percentage of Assets amgp:HeavyTrucksAndEquipment0.00.00.00.00.00.00.00.00.0

us-gaap:AssetUnderConstruction


Property
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-31
Value182144139146163307300287251185
Percentage of PropertyPlantAndEquipmentGross5.24.24.14.34.99.38.98.86.75.0
Percentage of Assets3.32.62.52.62.95.34.84.53.72.8
Percentage of Assets us-gaap:AssetUnderConstruction0.00.00.00.00.00.00.00.00.00.0

us-gaap:Land


Property
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-31
Value23232323232323222321
Percentage of PropertyPlantAndEquipmentGross0.70.70.70.70.70.70.70.70.60.6
Percentage of Assets0.40.40.40.40.40.40.40.40.30.3
Percentage of Assets us-gaap:Land0.00.00.00.00.00.00.00.00.00.0

us-gaap:Landfill


Property
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-31
Value1.2441.2441.2441.2441.2447765
Percentage of PropertyPlantAndEquipmentGross0.00.00.00.00.02.11.8
Percentage of Assets0.00.00.00.00.01.21.0
Percentage of Assets us-gaap:Landfill0.00.00.00.00.00.00.0

Accumulated Depreciation Depletion And Amortization Property Plant And Equipment

us-gaap:AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment

us-gaap:AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment


Accumulated
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-31
Value2111841571301047687
Percentage of AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets3.83.32.82.31.81.31.4

Amortization Of Intangible Assets

us-gaap:AmortizationOfIntangibleAssets

us-gaap:AmortizationOfIntangibleAssets


Amortization
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-31
Value17171717171717288.5341.781
Percentage of AmortizationOfIntangibleAssets100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets0.00.00.00.00.00.00.00.00.00.0

us-gaap:AmortizationOfIntangibleAssets us-gaap:ConsolidationItems, us-gaap:StatementBusinessSegments

us-gaap:OperatingSegments, am:GatheringAndCompression


Amortization
Period End2021-06-302020-06-30
Value9.2719.239
Percentage of AmortizationOfIntangibleAssets52.552.5
Percentage of Assets0.00.0
Percentage of Assets us-gaap:OperatingSegments am:GatheringAndCompression0.00.0

us-gaap:OperatingSegments, am:WaterHandling


Amortization
Period End2021-06-302020-06-30
Value8.3978.367
Percentage of AmortizationOfIntangibleAssets47.547.5
Percentage of Assets0.00.0
Percentage of Assets us-gaap:OperatingSegments am:WaterHandling0.00.0

us-gaap:OperatingSegments, amgp:GatheringAndCompression


Amortization
Period End2021-03-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-31
Value9.2719.3429.2399.23810162.4020.501
Percentage of AmortizationOfIntangibleAssets52.552.552.552.559.456.728.128.1
Percentage of Assets0.00.00.00.00.00.00.00.0
Percentage of Assets us-gaap:OperatingSegments amgp:GatheringAndCompression0.00.00.00.00.00.00.00.0

us-gaap:OperatingSegments, amgp:WaterHandling


Amortization
Period End2021-03-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-31
Value8.3978.4588.3678.3677.248126.1321.28
Percentage of AmortizationOfIntangibleAssets47.547.547.547.540.643.371.971.9
Percentage of Assets0.00.00.00.00.00.00.00.0
Percentage of Assets us-gaap:OperatingSegments amgp:WaterHandling0.00.00.00.00.00.00.00.0

us-gaap:AmortizationOfIntangibleAssets us-gaap:FiniteLivedIntangibleAssetsByMajorClass

us-gaap:CustomerRelationships


Amortization
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-31
Value17171717171717
Percentage of AmortizationOfIntangibleAssets100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets0.00.00.00.00.00.00.0
Percentage of Assets us-gaap:CustomerRelationships0.00.00.00.00.00.00.0

us-gaap:AmortizationOfIntangibleAssets us-gaap:StatementBusinessSegments

am:GatheringAndCompression


Amortization
Period End2021-06-302020-06-30
Value9.2719.239
Percentage of AmortizationOfIntangibleAssets52.552.5
Percentage of Assets0.00.0
Percentage of Assets am:GatheringAndCompression0.00.0

am:WaterHandling


Amortization
Period End2021-06-302020-06-30
Value8.3978.367
Percentage of AmortizationOfIntangibleAssets47.547.5
Percentage of Assets0.00.0
Percentage of Assets am:WaterHandling0.00.0

amgp:GatheringAndCompression


Amortization
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-31
Value9.2719.2679.3429.2399.23810162.4020.501
Percentage of AmortizationOfIntangibleAssets52.552.552.552.552.559.456.728.128.1
Percentage of Assets0.00.00.00.00.00.00.00.00.0
Percentage of Assets amgp:GatheringAndCompression0.00.00.00.00.00.00.00.00.0

amgp:WaterHandling


Amortization
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-31
Value8.3978.3948.4588.3678.3677.248126.1321.28
Percentage of AmortizationOfIntangibleAssets47.547.547.547.547.540.643.371.971.9
Percentage of Assets0.00.00.00.00.00.00.00.00.0
Percentage of Assets amgp:WaterHandling0.00.00.00.00.00.00.00.00.0

Property Plant And Equipment Net

us-gaap:PropertyPlantAndEquipmentNet

us-gaap:PropertyPlantAndEquipmentNet


Property
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-31
Value3293324932543255324932283273321537443659
Percentage of PropertyPlantAndEquipmentNet100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets59.458.658.057.456.955.852.149.955.354.9

Investments In Affiliates Subsidiaries Associates And Joint Ventures

us-gaap:InvestmentsInAffiliatesSubsidiariesAssociatesAndJointVentures

us-gaap:InvestmentsInAffiliatesSubsidiariesAssociatesAndJointVentures


Investments
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312017-12-31
Value707712722728729716709672118611534323
Percentage of InvestmentsInAffiliatesSubsidiariesAssociatesAndJointVentures100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets12.812.812.912.812.812.411.310.417.517.391.279.9

us-gaap:InvestmentsInAffiliatesSubsidiariesAssociatesAndJointVentures us-gaap:EquityMethodInvestmentNonconsolidatedInvestee

us-gaap:EquityMethodInvestmentNonconsolidatedInvesteeOrGroupOfInvestees


Investments
Period End2020-12-312019-12-312018-12-31
Value72270943
Percentage of InvestmentsInAffiliatesSubsidiariesAssociatesAndJointVentures100.0100.0100.0
Percentage of Assets12.911.391.2
Percentage of Assets us-gaap:EquityMethodInvestmentNonconsolidatedInvesteeOrGroupOfInvestees41.641.20.0

us-gaap:InvestmentsInAffiliatesSubsidiariesAssociatesAndJointVentures us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName

am:AppalachiaJointVenture


Investments
Period End2021-06-302020-12-31
Value573584
Percentage of InvestmentsInAffiliatesSubsidiariesAssociatesAndJointVentures81.181.0
Percentage of Assets10.410.4
Percentage of Assets am:AppalachiaJointVenture0.00.0

am:StonewallGasGatheringLLC


Investments
Period End2021-06-302020-12-31
Value133137
Percentage of InvestmentsInAffiliatesSubsidiariesAssociatesAndJointVentures18.919.0
Percentage of Assets2.42.5
Percentage of Assets am:StonewallGasGatheringLLC0.00.0

amgp:AppalachiaJointVenture


Investments
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-31
Value57758458959057756953110521019
Percentage of InvestmentsInAffiliatesSubsidiariesAssociatesAndJointVentures81.181.080.980.980.580.279.188.888.4
Percentage of Assets10.410.410.410.310.09.18.215.615.3
Percentage of Assets amgp:AppalachiaJointVenture0.00.00.00.00.00.00.00.00.0

amgp:StonewallGasGatheringLLC


Investments
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-31
Value134137139139139140140133134
Percentage of InvestmentsInAffiliatesSubsidiariesAssociatesAndJointVentures18.919.019.119.119.519.820.911.211.6
Percentage of Assets2.42.52.52.42.42.22.22.02.0
Percentage of Assets amgp:StonewallGasGatheringLLC0.00.00.00.00.00.00.00.00.0

Finite Lived Intangible Assets Net

us-gaap:FiniteLivedIntangibleAssetsNet

us-gaap:FiniteLivedIntangibleAssetsNet


Finite
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-30
Value13921409142714451462148014981496
Percentage of FiniteLivedIntangibleAssetsNet100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets25.125.425.425.525.625.623.823.2

us-gaap:FiniteLivedIntangibleAssetsNet us-gaap:FiniteLivedIntangibleAssetsByMajorClass

us-gaap:CustomerRelationships


Finite
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-30
Value13921409142714451462148014981496
Percentage of FiniteLivedIntangibleAssetsNet100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets25.125.425.425.525.625.623.823.2
Percentage of Assets us-gaap:CustomerRelationships0.00.00.00.00.00.00.00.0

Deferred Tax Assets Liabilities Net

us-gaap:DeferredTaxAssetsLiabilitiesNet

us-gaap:DeferredTaxAssetsLiabilitiesNet


Deferred
Period End2020-12-312019-12-312019-09-302019-03-312018-12-31
Value103103353.6811.304
Percentage of DeferredTaxAssetsLiabilitiesNet100.0100.0100.0100.0100.0
Percentage of Assets1.81.60.60.12.7

Other Assets Noncurrent

us-gaap:OtherAssetsNoncurrent

us-gaap:OtherAssetsNoncurrent


Other
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-31
Value7.9918.6419.6110111114
Percentage of OtherAssetsNoncurrent100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets0.10.20.20.20.20.20.2

Accounts Payable Current

us-gaap:AccountsPayableCurrent

us-gaap:AccountsPayableCurrent


Accounts
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-31
Value24149.4951919216.6453227220.028
Percentage of AccountsPayableCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets0.40.30.20.40.30.40.10.50.40.30.1

Accrued Liabilities Current

us-gaap:AccruedLiabilitiesCurrent

us-gaap:AccruedLiabilitiesCurrent


Accrued
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-03-312017-12-312017-09-302017-06-302017-03-312016-12-31
Value8356743672571049682730.4070.8430.2930.6111.4831.60.426
Percentage of AccruedLiabilitiesCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets1.51.01.30.61.31.01.71.51.21.10.92.01.02.85.55.62.5

Liabilities Current

us-gaap:LiabilitiesCurrent

us-gaap:LiabilitiesCurrent


Liabilities
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-31
Value117799461988324225923711816141420149.5115.414137.1
Percentage of LiabilitiesCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets2.11.41.71.11.71.43.94.03.51.835.333.535.948.247.644.220.046.540.9

us-gaap:LiabilitiesCurrent us-gaap:EquityMethodInvestmentNonconsolidatedInvestee

us-gaap:EquityMethodInvestmentNonconsolidatedInvesteeOrGroupOfInvestees


Liabilities
Period End2020-12-312019-12-31
Value9.24233
Percentage of LiabilitiesCurrent9.814.0
Percentage of Assets0.20.5
Percentage of Assets us-gaap:EquityMethodInvestmentNonconsolidatedInvesteeOrGroupOfInvestees0.52.0

Other Accrued Liabilities Current

us-gaap:OtherAccruedLiabilitiesCurrent

us-gaap:OtherAccruedLiabilitiesCurrent


Other
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-31
Value3317000.03384000.04025000.04853000.05637000.05923000.07341000.04105000.06761000.03785000.0407000.0
Percentage of OtherAccruedLiabilitiesCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets0.10.10.10.10.10.10.10.10.10.10.9

Other Liabilities Current

us-gaap:OtherLiabilitiesCurrent

us-gaap:OtherLiabilitiesCurrent


Other
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-31
Value5194000.05327000.05701000.02375000.03325000.03084000.03105000.0
Percentage of OtherLiabilitiesCurrent100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets0.10.10.10.00.10.10.0

Liabilities Noncurrent

us-gaap:LiabilitiesNoncurrent us-gaap:EquityMethodInvestmentNonconsolidatedInvestee

us-gaap:LiabilitiesNoncurrent

us-gaap:EquityMethodInvestmentNonconsolidatedInvesteeOrGroupOfInvestees


Liabilities
Period End2020-12-312019-12-31
Value5225000.05521000.0
Percentage of LiabilitiesNoncurrent100.0100.0
Percentage of Assets0.10.1
Percentage of Assets us-gaap:EquityMethodInvestmentNonconsolidatedInvesteeOrGroupOfInvestees0.30.3

Long Term Debt

us-gaap:LongTermDebt

us-gaap:LongTermDebt


Long
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-31
Value3087310330913121308831032892
Percentage of LongTermDebt100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets55.756.055.155.054.053.746.0

us-gaap:LongTermDebt us-gaap:CreditFacility

am:SeniorNotesDue2024Bearing5.375Rate


Long
Period End2020-12-31
Value646
Percentage of LongTermDebt20.9
Percentage of Assets11.5
Percentage of Assets am:SeniorNotesDue2024Bearing5.375Rate0.0

am:SeniorNotesDue2026Bearing7.875Rate


Long
Period End2021-06-302020-12-31
Value543543
Percentage of LongTermDebt17.617.6
Percentage of Assets9.89.7
Percentage of Assets am:SeniorNotesDue2026Bearing7.875Rate0.00.0

am:SeniorNotesDue2027Bearing5.75Rate


Long
Period End2021-06-302020-12-31
Value645645
Percentage of LongTermDebt20.920.9
Percentage of Assets11.711.5
Percentage of Assets am:SeniorNotesDue2027Bearing5.75Rate0.00.0

am:SeniorNotesDue2028Bearing5.75Rate


Long
Period End2021-06-302020-12-31
Value643643
Percentage of LongTermDebt20.820.8
Percentage of Assets11.611.5
Percentage of Assets am:SeniorNotesDue2028Bearing5.75Rate0.00.0

am:SeniorNotesDue2029Bearing5.375Rate


Long
Period End2021-06-30
Value741
Percentage of LongTermDebt24.0
Percentage of Assets13.4
Percentage of Assets am:SeniorNotesDue2029Bearing5.375Rate0.0

amgp:SeniorNotesDue2024Bearing5.375Rate


Long
Period End2021-03-312020-12-312019-12-31
Value646646645
Percentage of LongTermDebt20.820.922.3
Percentage of Assets11.711.510.3
Percentage of Assets amgp:SeniorNotesDue2024Bearing5.375Rate0.00.00.0

amgp:SeniorNotesDue2026Bearing7.875Rate


Long
Period End2021-03-312020-12-31
Value543543
Percentage of LongTermDebt17.517.6
Percentage of Assets9.89.7
Percentage of Assets amgp:SeniorNotesDue2026Bearing7.875Rate0.00.0

amgp:SeniorNotesDue2027Bearing5.75Rate


Long
Period End2021-03-312020-12-312019-12-31
Value645645644
Percentage of LongTermDebt20.820.922.3
Percentage of Assets11.611.510.3
Percentage of Assets amgp:SeniorNotesDue2027Bearing5.75Rate0.00.00.0

amgp:SeniorNotesDue2028Bearing5.75Rate


Long
Period End2021-03-312020-12-312019-12-31
Value643643642
Percentage of LongTermDebt20.720.822.2
Percentage of Assets11.611.510.2
Percentage of Assets amgp:SeniorNotesDue2028Bearing5.75Rate0.00.00.0

us-gaap:SeniorNotes


Long
Period End2021-06-302021-03-312020-12-312019-12-31
Value2574247824781932
Percentage of LongTermDebt83.479.980.266.8
Percentage of Assets46.544.744.230.8
Percentage of Assets us-gaap:SeniorNotes0.00.00.00.0

Long Term Debt Noncurrent

us-gaap:LongTermDebtNoncurrent

us-gaap:LongTermDebtNoncurrent


Long
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-31
Value3087310330913121308831032892
Percentage of LongTermDebtNoncurrent100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets55.756.055.155.054.053.746.0

Minority Interest

us-gaap:MinorityInterest us-gaap:EquityMethodInvestmentNonconsolidatedInvestee

us-gaap:MinorityInterest

us-gaap:EquityMethodInvestmentNonconsolidatedInvesteeOrGroupOfInvestees


Minority
Period End2020-12-312019-12-31
Value169175
Percentage of MinorityInterest100.0100.0
Percentage of Assets3.02.8
Percentage of Assets us-gaap:EquityMethodInvestmentNonconsolidatedInvesteeOrGroupOfInvestees9.710.2

Other Liabilities Noncurrent

us-gaap:OtherLiabilitiesNoncurrent

us-gaap:OtherLiabilitiesNoncurrent


Other
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-31
Value6735000.06716000.06995000.04937000.04943000.05082000.05131000.0
Percentage of OtherLiabilitiesNoncurrent100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets0.10.10.10.10.10.10.1

Stockholders Equity

us-gaap:StockholdersEquity

us-gaap:StockholdersEquity


Stockholders
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-31
Value232823562418248525232588314335233972403530
Percentage of StockholdersEquity100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets42.042.543.143.844.144.850.054.758.760.564.7

us-gaap:StockholdersEquity us-gaap:EquityMethodInvestmentNonconsolidatedInvestee

us-gaap:EquityMethodInvestmentNonconsolidatedInvesteeOrGroupOfInvestees


Stockholders
Period End2020-12-312019-12-31
Value15531507
Percentage of StockholdersEquity64.348.0
Percentage of Assets27.724.0
Percentage of Assets us-gaap:EquityMethodInvestmentNonconsolidatedInvesteeOrGroupOfInvestees89.487.5

us-gaap:StockholdersEquity us-gaap:StatementEquityComponents

us-gaap:AdditionalPaidInCapital


Stockholders
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-31
Value2624273228773021316433183480371538744007
Percentage of StockholdersEquity112.7115.9119.0121.6125.4128.2110.7105.497.599.3
Percentage of Assets47.449.351.353.355.457.455.457.657.260.1
Percentage of Assets us-gaap:AdditionalPaidInCapital0.00.00.00.00.00.00.00.00.00.0

us-gaap:CommonStock


Stockholders
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-31
Value4.7744.7694.7664.7664.7654.7944.845.0345.0685.066
Percentage of StockholdersEquity0.20.20.20.20.20.20.20.10.10.1
Percentage of Assets0.10.10.10.10.10.10.10.10.10.1
Percentage of Assets us-gaap:CommonStock0.00.00.00.00.00.00.00.00.00.0

us-gaap:RetainedEarnings


Stockholders
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-31
Value-300.428-380.651-464.092-540.55-646.057-734.498-341.565-197.0069223
Percentage of StockholdersEquity-12.9-16.2-19.2-21.7-25.6-28.4-10.9-5.62.30.6
Percentage of Assets-5.4-6.9-8.3-9.5-11.3-12.7-5.4-3.11.40.3
Percentage of Assets us-gaap:RetainedEarnings0.00.00.00.00.00.00.00.00.00.0

Common Stock Value

us-gaap:CommonStockValue

us-gaap:CommonStockValue


Common
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-31
Value4774000.04769000.04766000.04766000.04765000.04794000.04840000.0
Percentage of CommonStockValue100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets0.10.10.10.10.10.10.1

Additional Paid In Capital

us-gaap:AdditionalPaidInCapital

us-gaap:AdditionalPaidInCapital


Additional
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-31
Value2624273228773021316433183480
Percentage of AdditionalPaidInCapital100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets47.449.351.353.355.457.455.4

Retained Earnings Accumulated Deficit

us-gaap:RetainedEarningsAccumulatedDeficit

us-gaap:RetainedEarningsAccumulatedDeficit


Retained
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-31
Value-300430000.0-380650000.0-464090000.0-540550000.0-646060000.0-734500000.0-341560000.0
Percentage of RetainedEarningsAccumulatedDeficit100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets-5.4-6.9-8.3-9.5-11.3-12.7-5.4

Minority Interest

us-gaap:MinorityInterest us-gaap:EquityMethodInvestmentNonconsolidatedInvestee

us-gaap:MinorityInterest

us-gaap:EquityMethodInvestmentNonconsolidatedInvesteeOrGroupOfInvestees


Minority
Period End2020-12-312019-12-31
Value169175
Percentage of MinorityInterest100.0100.0
Percentage of Assets3.02.8
Percentage of Assets us-gaap:EquityMethodInvestmentNonconsolidatedInvesteeOrGroupOfInvestees9.710.2

Net Cash Provided By Used In Operating Activities

us-gaap:NetCashProvidedByUsedInOperatingActivities

us-gaap:NetCashProvidedByUsedInOperatingActivities


Net
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-30
Value19416520618424112019217718269252211231411-5.3647.1464.4192.705
Percentage of NetCashProvidedByUsedInOperatingActivities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax0.00.0101.379.1109.949.580.572.971.4128.659.860.734.381.70.00.00.00.00.00.0

Net Cash Provided By Used In Investing Activities

us-gaap:NetCashProvidedByUsedInInvestingActivities

us-gaap:NetCashProvidedByUsedInInvestingActivities


Net
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-31
Value-46051000.0-27653000.0-31225000.0-44665000.0-65964000.0-77377000.0-169380000.0-134890000.0-160220000.0-61178000.0
Percentage of NetCashProvidedByUsedInInvestingActivities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax0.00.0-15.3-19.1-30.0-31.7-70.9-55.3-62.7-113.1

Net Cash Provided By Used In Financing Activities

us-gaap:NetCashProvidedByUsedInFinancingActivities

us-gaap:NetCashProvidedByUsedInFinancingActivities


Net
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value-148210000.0-138430000.0-177020000.0-140680000.0-172470000.0-44578000.0-21898000.0-50607000.0-16531000.0-9263000.0-27415000.0-23996000.0-20538000.0-14747000.0-10985000.0
Percentage of NetCashProvidedByUsedInFinancingActivities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax0.00.0-86.8-60.3-78.5-18.3-9.2-20.8-6.5-17.1-63.0-63.5-62.0-51.80.0

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

us-gaap:CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect

us-gaap:CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect


Cash
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value417000.0-379000.0-1753000.0-604000.02997000.0-1235000.01235000.0-7791000.05823000.0-854000.0-1424000.0-1054000.0-9182000.08495000.0
Percentage of CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax0.00.0-0.9-0.31.4-0.50.5-3.22.3-1.6-3.3-2.8-27.729.9

Amortization Of Financing Costs

us-gaap:AmortizationOfFinancingCosts

us-gaap:AmortizationOfFinancingCosts


Amortization
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-30
Value1345000.01388000.01204000.01109000.01100000.01090000.01060000.01021000.0851000.0251000.058000.072000.0
Percentage of AmortizationOfFinancingCosts100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Deferred Income Tax Expense Benefit

us-gaap:DeferredIncomeTaxExpenseBenefit

us-gaap:DeferredIncomeTaxExpenseBenefit


Deferred
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-31
Value2828213431-88.328-67.701-62.26830-2.377
Percentage of DeferredIncomeTaxExpenseBenefit100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Increase Decrease In Accounts Payable

us-gaap:IncreaseDecreaseInAccountsPayable

us-gaap:IncreaseDecreaseInAccountsPayable


Increase
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-31
Value579000.04786000.0-5038000.0744000.0-1119000.06614000.0-6127000.0994000.0-3175000.0-1454000.0
Percentage of IncreaseDecreaseInAccountsPayable100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Increase Decrease In Accounts Receivable

us-gaap:IncreaseDecreaseInAccountsReceivable

us-gaap:IncreaseDecreaseInAccountsReceivable


Increase
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-31
Value31000.0-808000.0-295000.0-50000.0-91000.0-998000.0-173000.0-3000.0-27000.018000.0
Percentage of IncreaseDecreaseInAccountsReceivable100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Net Cash Provided By Used In Operating Activities

us-gaap:NetCashProvidedByUsedInOperatingActivities

us-gaap:NetCashProvidedByUsedInOperatingActivities


Net
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-30
Value19416520618424112019217718269252211231411-5.3647.1464.4192.705
Percentage of NetCashProvidedByUsedInOperatingActivities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax0.00.0101.379.1109.949.580.572.971.4128.659.860.734.381.70.00.00.00.00.00.0

Profit Loss

us-gaap:ProfitLoss

us-gaap:ProfitLoss


Profit
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-31
Value80837610588-392.933-144.559-289.477699.648211814125.9072.978-3.261-3.2994.276
Percentage of ProfitLoss100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax0.00.037.545.240.2-161.2-60.5-118.727.117.849.247.743.445.00.00.00.00.00.0

us-gaap:ProfitLoss us-gaap:StatementEquityComponents

us-gaap:RetainedEarnings


Profit
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-09-302019-06-30
Value808310588-392.933-289.47769
Percentage of ProfitLoss100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax0.00.045.240.2-161.2-118.727.1
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax us-gaap:RetainedEarnings0.00.00.00.00.00.00.0

Share Based Compensation

us-gaap:ShareBasedCompensation

us-gaap:ShareBasedCompensation


Share
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value3.0594.0123.0653.6782.6973.338202021118.7928.5749.1118.6358.6628.3179.6318.323
Percentage of ShareBasedCompensation100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Net Cash Provided By Used In Investing Activities

us-gaap:NetCashProvidedByUsedInInvestingActivities

us-gaap:NetCashProvidedByUsedInInvestingActivities


Net
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-31
Value-46051000.0-27653000.0-31225000.0-44665000.0-65964000.0-77377000.0-169380000.0-134890000.0-160220000.0-61178000.0
Percentage of NetCashProvidedByUsedInInvestingActivities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax0.00.0-15.3-19.1-30.0-31.7-70.9-55.3-62.7-113.1

Payments To Acquire Property Plant And Equipment

us-gaap:PaymentsToAcquirePropertyPlantAndEquipment

us-gaap:PaymentsToAcquirePropertyPlantAndEquipment


Payments
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-31
Value3615193449549681817.677
Percentage of PaymentsToAcquirePropertyPlantAndEquipment100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Net Cash Provided By Used In Financing Activities

us-gaap:NetCashProvidedByUsedInFinancingActivities

us-gaap:NetCashProvidedByUsedInFinancingActivities


Net
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value-148210000.0-138430000.0-177020000.0-140680000.0-172470000.0-44578000.0-21898000.0-50607000.0-16531000.0-9263000.0-27415000.0-23996000.0-20538000.0-14747000.0-10985000.0
Percentage of NetCashProvidedByUsedInFinancingActivities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax0.00.0-86.8-60.3-78.5-18.3-9.2-20.8-6.5-17.1-63.0-63.5-62.0-51.80.0

Payments Of Dividends Common Stock

us-gaap:PaymentsOfDividendsCommonStock

us-gaap:PaymentsOfDividendsCommonStock


Payments
Period End2021-05-122021-06-302021-02-112021-03-312020-11-122020-12-312020-08-122020-09-302020-05-122020-06-302020-02-122020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value108108147147146146146146147147148148155154152302623201310
Percentage of PaymentsOfDividendsCommonStock100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Payments For Repurchase Of Common Stock

us-gaap:PaymentsForRepurchaseOfCommonStock

us-gaap:PaymentsForRepurchaseOfCommonStock


Payments
Period End2020-12-312020-09-302020-06-302020-03-312019-12-31
Value0.00.08.88915100
Percentage of PaymentsForRepurchaseOfCommonStock0.00.0100.0100.0100.0

Deferred Tax Assets Net

us-gaap:DeferredTaxAssetsNet

us-gaap:DeferredTaxAssetsNet


Deferred
Period End2020-12-312019-12-312018-12-31
Value1031031.304
Percentage of DeferredTaxAssetsNet100.0100.0100.0

am:CapitalExpendituresForSegmentPropertyAndEquipment

am:CapitalExpendituresForSegmentPropertyAndEquipment


Capital
Period End2021-06-302020-06-30
Value4555
Percentage of CapitalExpendituresForSegmentPropertyAndEquipment100.0100.0

am:CapitalExpendituresForSegmentPropertyAndEquipment us-gaap:ConsolidationItems, us-gaap:StatementBusinessSegments

us-gaap:OperatingSegments, am:GatheringAndCompression


Capital
Period End2021-06-302020-06-30
Value3649
Percentage of CapitalExpendituresForSegmentPropertyAndEquipment79.688.9

us-gaap:OperatingSegments, am:WaterHandling


Capital
Period End2021-06-302020-06-30
Value9.3776.153
Percentage of CapitalExpendituresForSegmentPropertyAndEquipment20.411.1

am:CostOfRevenueExcludingDepreciationAndAmortization

am:CostOfRevenueExcludingDepreciationAndAmortization


Cost
Period End2021-06-302020-06-30
Value3942
Percentage of CostOfRevenueExcludingDepreciationAndAmortization100.0100.0

am:DebtInstrumentAmountRedeemed dei:LegalEntity, us-gaap:CreditFacility

am:DebtInstrumentAmountRedeemed

am:AnteroMidstreamPartnersAndAnteroMidstreamFinanceCorp, am:SeniorNotesDue2024Bearing5.375Rate


Debt
Period End2021-06-08
Value650
Percentage of DebtInstrumentAmountRedeemed100.0

am:DebtInstrumentRedemptionPricePercentageUponChangeOfControl dei:LegalEntity, us-gaap:CreditFacility

am:DebtInstrumentRedemptionPricePercentageUponChangeOfControl

am:AnteroMidstreamPartnersAndAnteroMidstreamFinanceCorp, am:SeniorNotesDue2026Bearing7.875Rate


Debt
Period End2020-11-10
Value101.0
Percentage of DebtInstrumentRedemptionPricePercentageUponChangeOfControl100.0

am:AnteroMidstreamPartnersAndAnteroMidstreamFinanceCorp, am:SeniorNotesDue2029Bearing5.375Rate


Debt
Period End2021-06-08
Value101.0
Percentage of DebtInstrumentRedemptionPricePercentageUponChangeOfControl0.0

am:DebtInstrumentRedemptionPricePercentageWithPaymentOfPremiumAndAccruedAndUnpaidInterest dei:LegalEntity, us-gaap:CreditFacility, us-gaap:DebtInstrumentRedemptionPeriod

am:DebtInstrumentRedemptionPricePercentageWithPaymentOfPremiumAndAccruedAndUnpaidInterest

am:AnteroMidstreamPartnersAndAnteroMidstreamFinanceCorp, am:SeniorNotesDue2026Bearing7.875Rate, us-gaap:DebtInstrumentRedemptionPeriodThree


Debt
Period End2020-11-10
Value100.0
Percentage of DebtInstrumentRedemptionPricePercentageWithPaymentOfPremiumAndAccruedAndUnpaidInterest100.0

am:AnteroMidstreamPartnersAndAnteroMidstreamFinanceCorp, am:SeniorNotesDue2029Bearing5.375Rate, us-gaap:DebtInstrumentRedemptionPeriodThree


Debt
Period End2021-06-08
Value100.0
Percentage of DebtInstrumentRedemptionPricePercentageWithPaymentOfPremiumAndAccruedAndUnpaidInterest0.0

am:FacilityIdling

am:FacilityIdling


Facility
Period End2021-06-302020-06-30
Value0.9842.475
Percentage of FacilityIdling100.0100.0

am:FacilityIdling us-gaap:ConsolidationItems, us-gaap:StatementBusinessSegments

us-gaap:OperatingSegments, am:WaterHandling


Facility
Period End2021-06-302020-06-30
Value0.9842.475
Percentage of FacilityIdling100.0100.0

am:FacilityIdling us-gaap:RestructuringCostAndReserve

us-gaap:FacilityClosing


Facility
Period End2021-06-302020-06-30
Value1.02.0
Percentage of FacilityIdling101.680.8

am:GeneralAndAdministrativeExpenseBeforeEquityBasedCompensation

am:GeneralAndAdministrativeExpenseBeforeEquityBasedCompensation


General
Period End2021-06-302020-06-30
Value1412
Percentage of GeneralAndAdministrativeExpenseBeforeEquityBasedCompensation100.0100.0

am:GeneralAndAdministrativeExpenseBeforeEquityBasedCompensation us-gaap:ConsolidationItems

us-gaap:CorporateNonSegment


General
Period End2021-06-302020-06-30
Value0.6441.591
Percentage of GeneralAndAdministrativeExpenseBeforeEquityBasedCompensation4.512.8

am:GeneralAndAdministrativeExpenseBeforeEquityBasedCompensation us-gaap:ConsolidationItems, us-gaap:StatementBusinessSegments

us-gaap:OperatingSegments, am:GatheringAndCompression


General
Period End2021-06-302020-06-30
Value8.7347.706
Percentage of GeneralAndAdministrativeExpenseBeforeEquityBasedCompensation61.362.0

us-gaap:OperatingSegments, am:WaterHandling


General
Period End2021-06-302020-06-30
Value4.8733.125
Percentage of GeneralAndAdministrativeExpenseBeforeEquityBasedCompensation34.225.2

am:PercentageOfAggregatePrincipalAmountThatCanBeRedeemed dei:LegalEntity, us-gaap:CreditFacility, us-gaap:DebtInstrumentRedemptionPeriod

am:PercentageOfAggregatePrincipalAmountThatCanBeRedeemed

am:AnteroMidstreamPartnersAndAnteroMidstreamFinanceCorp, am:SeniorNotesDue2029Bearing5.375Rate, us-gaap:DebtInstrumentRedemptionPeriodOne


Percentage
Period End2021-06-08
Value35.0
Percentage of PercentageOfAggregatePrincipalAmountThatCanBeRedeemed100.0

am:PercentageOfAggregatePrincipalAmountThatCanBeRedeemed dei:LegalEntity, us-gaap:Range, us-gaap:CreditFacility

am:AnteroMidstreamPartnersAndAnteroMidstreamFinanceCorp, srt:Maximum, am:SeniorNotesDue2026Bearing7.875Rate


Percentage
Period End2020-11-10
Value35.0
Percentage of PercentageOfAggregatePrincipalAmountThatCanBeRedeemed0.0

am:PerformanceShareUnitAwardsExpense us-gaap:AwardType

am:PerformanceShareUnitAwardsExpense

am:PerformanceShareUnitAwardsBasedOnReturnOnInvestedCapital


Performance
Period End2021-06-302020-06-30
Value-100000.0100000.0
Percentage of PerformanceShareUnitAwardsExpense100.0100.0

amgp:BusinessAcquisitionContingentConsiderationAccretionAndChangeInFairValueAndAccretionOfAssetRetirementObligations

amgp:BusinessAcquisitionContingentConsiderationAccretionAndChangeInFairValueAndAccretionOfAssetRetirementObligations


Business
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-31
Value38000.039000.061000.042000.02807000.02031000.02366000.01059000.0
Percentage of BusinessAcquisitionContingentConsiderationAccretionAndChangeInFairValueAndAccretionOfAssetRetirementObligations100.0100.0100.0100.0100.0100.0100.0100.0

amgp:CapitalExpendituresForSegmentPropertyAndEquipment

amgp:CapitalExpendituresForSegmentPropertyAndEquipment


Capital
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-31
Value283141556712912012516
Percentage of CapitalExpendituresForSegmentPropertyAndEquipment100.0100.0100.0100.0100.0100.0100.0100.0100.0

amgp:CapitalExpendituresForSegmentPropertyAndEquipment us-gaap:ConsolidationItems, us-gaap:StatementBusinessSegments

us-gaap:OperatingSegments, amgp:GatheringAndCompression


Capital
Period End2021-03-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-31
Value153449549681817.677
Percentage of CapitalExpendituresForSegmentPropertyAndEquipment53.081.388.980.474.267.665.148.0

us-gaap:OperatingSegments, amgp:WaterHandling


Capital
Period End2021-03-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-31
Value137.816.153133339438.328
Percentage of CapitalExpendituresForSegmentPropertyAndEquipment47.018.711.119.625.832.434.952.0

amgp:ChangeInCapitalExpendituresIncurredButNotYetPaid

amgp:ChangeInCapitalExpendituresIncurredButNotYetPaid


Change
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-31
Value0.78-3.154-7.857-6.7273.266-40.88225-2.48611
Percentage of ChangeInCapitalExpendituresIncurredButNotYetPaid100.0100.0100.0100.0100.0100.0100.0100.0100.0

amgp:CostOfRevenueExcludingDepreciationAndAmortization

amgp:CostOfRevenueExcludingDepreciationAndAmortization


Cost
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-31
Value393638424855616314
Percentage of CostOfRevenueExcludingDepreciationAndAmortization100.0100.0100.0100.0100.0100.0100.0100.0100.0

amgp:DebtInstrumentRedemptionPricePercentageUponChangeOfControl us-gaap:CreditFacility

amgp:DebtInstrumentRedemptionPricePercentageUponChangeOfControl

amgp:SeniorNotesDue2026Bearing7.875Rate


Debt
Period End2020-11-10
Value101.0
Percentage of DebtInstrumentRedemptionPricePercentageUponChangeOfControl100.0

amgp:DebtInstrumentRedemptionPricePercentageWithPaymentOfPremiumAndAccruedAndUnpaidInterest us-gaap:CreditFacility, us-gaap:DebtInstrumentRedemptionPeriod

amgp:DebtInstrumentRedemptionPricePercentageWithPaymentOfPremiumAndAccruedAndUnpaidInterest

amgp:SeniorNotesDue2026Bearing7.875Rate, us-gaap:DebtInstrumentRedemptionPeriodThree


Debt
Period End2020-11-10
Value100.0
Percentage of DebtInstrumentRedemptionPricePercentageWithPaymentOfPremiumAndAccruedAndUnpaidInterest100.0

amgp:FacilityIdling

amgp:FacilityIdling


Facility
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-30
Value1.1791.5392.5272.4758.6789.8891.512
Percentage of FacilityIdling100.0100.0100.0100.0100.0100.0100.0

amgp:FacilityIdling us-gaap:ConsolidationItems, us-gaap:StatementBusinessSegments

us-gaap:OperatingSegments, amgp:WaterHandling


Facility
Period End2021-03-312020-09-302020-06-302020-03-312019-12-312019-09-30
Value1.1792.5272.4758.6789.8891.512
Percentage of FacilityIdling100.0100.0100.0100.0100.0100.0

amgp:FacilityIdling us-gaap:RestructuringCostAndReserve

us-gaap:FacilityClosing


Facility
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-31
Value1.01.32.52.58.711
Percentage of FacilityIdling84.884.598.9101.0100.3111.2

amgp:GatheringAndCompressionAgreementMinimumVolumeCommitmentThatRequireAnteroToPayForCompressorStations us-gaap:TypeOfArrangement

amgp:GatheringAndCompressionAgreementMinimumVolumeCommitmentThatRequireAnteroToPayForCompressorStations

amgp:GatheringAndCompressionAgreement


Gathering
Period End2021-03-31
Value70.0
Percentage of GatheringAndCompressionAgreementMinimumVolumeCommitmentThatRequireAnteroToPayForCompressorStations100.0

amgp:GatheringAndCompressionAgreementMinimumVolumeCommitmentThatRequireAnteroToPayForHighPressureLines us-gaap:TypeOfArrangement

amgp:GatheringAndCompressionAgreementMinimumVolumeCommitmentThatRequireAnteroToPayForHighPressureLines

amgp:GatheringAndCompressionAgreement


Gathering
Period End2021-03-31
Value75.0
Percentage of GatheringAndCompressionAgreementMinimumVolumeCommitmentThatRequireAnteroToPayForHighPressureLines100.0

amgp:GeneralAndAdministrativeExpenseBeforeEquityBasedCompensation

amgp:GeneralAndAdministrativeExpenseBeforeEquityBasedCompensation


General
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-31
Value139.9579.5549.725101210138.386
Percentage of GeneralAndAdministrativeExpenseBeforeEquityBasedCompensation100.0100.0100.0100.0100.0100.0100.0100.0100.0

amgp:GeneralAndAdministrativeExpenseBeforeEquityBasedCompensation us-gaap:ConsolidationItems

us-gaap:CorporateNonSegment


General
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-31
Value1.3741.8181.571.5912.253.8330.6271.7866.792
Percentage of GeneralAndAdministrativeExpenseBeforeEquityBasedCompensation9.918.316.416.422.130.36.013.781.0

amgp:GeneralAndAdministrativeExpenseBeforeEquityBasedCompensation us-gaap:ConsolidationItems, us-gaap:StatementBusinessSegments

us-gaap:OperatingSegments, amgp:GatheringAndCompression


General
Period End2021-03-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-31
Value5.9245.4055.445.0445.5646.7417.3351.02
Percentage of GeneralAndAdministrativeExpenseBeforeEquityBasedCompensation42.656.655.949.543.964.456.112.2

us-gaap:OperatingSegments, amgp:WaterHandling


General
Period End2021-03-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-31
Value6.622.5792.6942.9053.2683.0983.9580.574
Percentage of GeneralAndAdministrativeExpenseBeforeEquityBasedCompensation47.627.027.728.525.829.630.36.8

amgp:PaymentsToAcquireInterestInJointVentureAdditionalInvestment

amgp:PaymentsToAcquireInterestInJointVentureAdditionalInvestment


Payments
Period End2021-03-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-31
Value0.7572.8141011371310365
Percentage of PaymentsToAcquireInterestInJointVentureAdditionalInvestment100.0100.0100.0100.0100.0100.0100.0100.0

amgp:PaymentsToAcquireInterestInJointVentureAdditionalInvestment us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName

amgp:AppalachiaJointVenture


Payments
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-31
Value0.7570.4652.8141011371310365
Percentage of PaymentsToAcquireInterestInJointVentureAdditionalInvestment100.00.0100.0100.0100.0100.0100.0100.0100.0

amgp:PaymentsToAcquireWaterHandlingAndTreatmentSystems

amgp:PaymentsToAcquireWaterHandlingAndTreatmentSystems


Payments
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-31
Value13117.816.153133339438.328
Percentage of PaymentsToAcquireWaterHandlingAndTreatmentSystems100.0100.0100.0100.0100.0100.0100.0100.0100.0

amgp:PercentageOfAggregatePrincipalAmountThatCanBeRedeemed us-gaap:Range, us-gaap:CreditFacility

amgp:PercentageOfAggregatePrincipalAmountThatCanBeRedeemed

srt:Maximum, amgp:SeniorNotesDue2026Bearing7.875Rate


Percentage
Period End2020-11-10
Value35.0
Percentage of PercentageOfAggregatePrincipalAmountThatCanBeRedeemed100.0

amgp:PercentageOfInterestHeldInThirdPartyAssets us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName

amgp:PercentageOfInterestHeldInThirdPartyAssets

amgp:AppalachiaJointVenture


Percentage
Period End2021-03-312020-12-31
Value0.33330
Percentage of PercentageOfInterestHeldInThirdPartyAssets100.00.0

amgp:ThirdPartyOutOfPocketCostsReimbursementPercentage us-gaap:TypeOfArrangement

amgp:ThirdPartyOutOfPocketCostsReimbursementPercentage

amgp:WaterServicesAgreement


Third
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-31
Value3.002.9700.030000.03
Percentage of ThirdPartyOutOfPocketCostsReimbursementPercentage100.00.0100.00.0100.00.00.00.0100.0

us-gaap:AdjustmentsToAdditionalPaidInCapitalDividendsInExcessOfRetainedEarnings

us-gaap:AdjustmentsToAdditionalPaidInCapitalDividendsInExcessOfRetainedEarnings


Adjustments
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-09-302019-06-30
Value108147146147149154152
Percentage of AdjustmentsToAdditionalPaidInCapitalDividendsInExcessOfRetainedEarnings100.0100.0100.0100.0100.0100.0100.0

us-gaap:AdjustmentsToAdditionalPaidInCapitalDividendsInExcessOfRetainedEarnings us-gaap:StatementEquityComponents

us-gaap:AdditionalPaidInCapital


Adjustments
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-09-302019-06-30
Value108147146147149154152
Percentage of AdjustmentsToAdditionalPaidInCapitalDividendsInExcessOfRetainedEarnings100.0100.0100.0100.0100.0100.0100.0

us-gaap:AssetImpairmentCharges

us-gaap:AssetImpairmentCharges


Asset
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-30
Value0.01.3798.1490.9470.0664303457
Percentage of AssetImpairmentCharges0.0100.0100.0100.00.0100.0100.0100.0

us-gaap:AssetRetirementObligationCashPaidToSettle

us-gaap:AssetRetirementObligationCashPaidToSettle


Asset
Period End2021-06-302021-03-312020-12-312020-09-30
Value194000.0408000.0666000.0916000.0
Percentage of AssetRetirementObligationCashPaidToSettle100.0100.0100.0100.0

us-gaap:CommonStockDividendsPerShareCashPaid

us-gaap:CommonStockDividendsPerShareCashPaid


Common
Period End2021-05-122021-02-112020-11-122020-08-122020-05-122020-02-12
Value0.2250.30750.30750.30750.30750.3075
Percentage of CommonStockDividendsPerShareCashPaid100.0100.0100.0100.0100.0100.0

us-gaap:CostDirectLabor us-gaap:RelatedPartyTransactionsByRelatedParty

us-gaap:CostDirectLabor

am:AnteroResourcesCorporation


Cost
Period End2021-06-302020-06-30
Value2000000.01000000.0
Percentage of CostDirectLabor100.0100.0

amgp:AnteroResourcesCorporation


Cost
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-31
Value3000000.01900000.01600000.01500000.02000000.01900000.01800000.01900000.0400000.0000
Percentage of CostDirectLabor0.00.00.0150.00.00.00.00.00.00.00.00.0

us-gaap:DebtInstrumentRedemptionPricePercentage dei:LegalEntity, us-gaap:CreditFacility

us-gaap:DebtInstrumentRedemptionPricePercentage

am:AnteroMidstreamPartnersAndAnteroMidstreamFinanceCorp, am:SeniorNotesDue2024Bearing5.375Rate


Debt
Period End2021-06-08
Value102.69
Percentage of DebtInstrumentRedemptionPricePercentage100.0

us-gaap:DebtInstrumentRedemptionPricePercentage dei:LegalEntity, us-gaap:CreditFacility, us-gaap:DebtInstrumentRedemptionPeriod

am:AnteroMidstreamPartnersAndAnteroMidstreamFinanceCorp, am:SeniorNotesDue2026Bearing7.875Rate, us-gaap:DebtInstrumentRedemptionPeriodOne


Debt
Period End2020-11-10
Value103.94
Percentage of DebtInstrumentRedemptionPricePercentage0.0

am:AnteroMidstreamPartnersAndAnteroMidstreamFinanceCorp, am:SeniorNotesDue2026Bearing7.875Rate, us-gaap:DebtInstrumentRedemptionPeriodThree


Debt
Period End2020-11-10
Value107.88
Percentage of DebtInstrumentRedemptionPricePercentage0.0

am:AnteroMidstreamPartnersAndAnteroMidstreamFinanceCorp, am:SeniorNotesDue2026Bearing7.875Rate, us-gaap:DebtInstrumentRedemptionPeriodTwo


Debt
Period End2020-11-10
Value100.0
Percentage of DebtInstrumentRedemptionPricePercentage0.0

am:AnteroMidstreamPartnersAndAnteroMidstreamFinanceCorp, am:SeniorNotesDue2029Bearing5.375Rate, us-gaap:DebtInstrumentRedemptionPeriodOne


Debt
Period End2021-06-08
Value102.69
Percentage of DebtInstrumentRedemptionPricePercentage100.0

am:AnteroMidstreamPartnersAndAnteroMidstreamFinanceCorp, am:SeniorNotesDue2029Bearing5.375Rate, us-gaap:DebtInstrumentRedemptionPeriodThree


Debt
Period End2021-06-08
Value105.38
Percentage of DebtInstrumentRedemptionPricePercentage102.6

am:AnteroMidstreamPartnersAndAnteroMidstreamFinanceCorp, am:SeniorNotesDue2029Bearing5.375Rate, us-gaap:DebtInstrumentRedemptionPeriodTwo


Debt
Period End2021-06-08
Value100.0
Percentage of DebtInstrumentRedemptionPricePercentage97.4

us-gaap:DebtInstrumentRedemptionPricePercentage us-gaap:CreditFacility, us-gaap:DebtInstrumentRedemptionPeriod

amgp:SeniorNotesDue2026Bearing7.875Rate, us-gaap:DebtInstrumentRedemptionPeriodOne


Debt
Period End2020-11-10
Value103.94
Percentage of DebtInstrumentRedemptionPricePercentage0.0

amgp:SeniorNotesDue2026Bearing7.875Rate, us-gaap:DebtInstrumentRedemptionPeriodThree


Debt
Period End2020-11-10
Value107.88
Percentage of DebtInstrumentRedemptionPricePercentage0.0

amgp:SeniorNotesDue2026Bearing7.875Rate, us-gaap:DebtInstrumentRedemptionPeriodTwo


Debt
Period End2020-11-10
Value100.0
Percentage of DebtInstrumentRedemptionPricePercentage0.0

us-gaap:Depreciation

us-gaap:Depreciation


Depreciation
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-31
Value2626262627272624367.65
Percentage of Depreciation100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DepreciationAndAmortization

us-gaap:DepreciationAndAmortization


Depreciation
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-31
Value2626262627272624367.65
Percentage of DepreciationAndAmortization100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DepreciationAndAmortization us-gaap:ConsolidationItems, us-gaap:StatementBusinessSegments

us-gaap:OperatingSegments, am:GatheringAndCompression


Depreciation
Period End2021-06-302020-06-30
Value1414
Percentage of DepreciationAndAmortization54.151.9

us-gaap:OperatingSegments, am:WaterHandling


Depreciation
Period End2021-06-302020-06-30
Value1213
Percentage of DepreciationAndAmortization45.948.1

us-gaap:OperatingSegments, amgp:GatheringAndCompression


Depreciation
Period End2021-03-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-31
Value141414131211122.56
Percentage of DepreciationAndAmortization54.855.651.947.747.047.934.933.5

us-gaap:OperatingSegments, amgp:WaterHandling


Depreciation
Period End2021-03-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-31
Value121113141412235.09
Percentage of DepreciationAndAmortization45.244.448.152.353.052.165.166.5

us-gaap:DirectOperatingCosts

us-gaap:DirectOperatingCosts


Direct
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-31
Value39393638424855616314
Percentage of DirectOperatingCosts100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DirectOperatingCosts us-gaap:ConsolidationItems, us-gaap:StatementBusinessSegments

us-gaap:OperatingSegments, am:GatheringAndCompression


Direct
Period End2021-06-302020-06-30
Value1714
Percentage of DirectOperatingCosts43.033.4

us-gaap:OperatingSegments, am:WaterHandling


Direct
Period End2021-06-302020-06-30
Value2228
Percentage of DirectOperatingCosts57.066.6

us-gaap:OperatingSegments, amgp:GatheringAndCompression


Direct
Period End2021-03-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-31
Value171614131313122.935
Percentage of DirectOperatingCosts43.842.333.427.523.721.419.319.6

us-gaap:OperatingSegments, amgp:WaterHandling


Direct
Period End2021-03-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-31
Value2221283541485112
Percentage of DirectOperatingCosts56.257.766.672.576.378.680.780.4

us-gaap:DistributionMadeToLimitedPartnerCashDistributionsPaid us-gaap:DistributionsMadeToMemberOrLimitedPartnerByDistributionType

us-gaap:DistributionMadeToLimitedPartnerCashDistributionsPaid

amgp:CashDistributionToCommonShareholders


Distribution
Period End2021-02-112021-03-312020-11-122020-12-312020-08-122020-09-302020-05-152020-05-122020-06-302020-02-142020-02-122020-03-312019-12-312019-11-142019-11-132019-08-072019-05-152019-05-082019-02-212018-11-212018-12-312018-08-222018-08-172018-09-302018-05-232018-06-302018-02-202018-03-312017-11-232017-12-312017-08-23
Value1471471461461461460.1371471470.1381481492.2990.1381531540.0981523026262323232020131310105.027
Percentage of DistributionMadeToLimitedPartnerCashDistributionsPaid100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DistributionMadeToLimitedPartnerCashDistributionsPaid us-gaap:DistributionsMadeToMemberOrLimitedPartnerByDistributionType, us-gaap:StatementClassOfStock

amgp:CashDistributionToCommonShareholders, us-gaap:PreferredClassA


Distribution
Period End2021-02-162020-11-162020-11-132020-08-142020-05-152020-02-142019-11-142019-09-182019-05-15
Value0.1380.1370.1370.1380.1370.1380.1380.1380.098
Percentage of DistributionMadeToLimitedPartnerCashDistributionsPaid0.00.00.00.0100.0100.0100.00.0100.0

us-gaap:DistributionMadeToLimitedPartnerDistributionsPaidPerUnit us-gaap:DistributionsMadeToMemberOrLimitedPartnerByDistributionType

us-gaap:DistributionMadeToLimitedPartnerDistributionsPaidPerUnit

amgp:CashDistributionToCommonShareholders


Distribution
Period End2021-02-112020-11-122020-08-122020-05-122020-02-122019-11-132019-08-072019-05-082019-02-21
Value0.30750.30750.30750.30750.30750.30750.30750.30250.164
Percentage of DistributionMadeToLimitedPartnerDistributionsPaidPerUnit100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:EquityMethodInvestmentDividendsOrDistributions

us-gaap:EquityMethodInvestmentDividendsOrDistributions


Equity
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312019-03-122018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-31
Value2631292718232118194.77543373328231915117.5434.822.7311.850.969
Percentage of EquityMethodInvestmentDividendsOrDistributions100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:EquityMethodInvestmentDividendsOrDistributions us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName

amgp:AppalachiaJointVenture


Equity
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-31
Value27262515211917214.775
Percentage of EquityMethodInvestmentDividendsOrDistributions84.989.292.586.891.289.994.6111.8100.0

amgp:StonewallGasGatheringLLC


Equity
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-30
Value4.8153.1952.072.42.0852.2051.0052.52
Percentage of EquityMethodInvestmentDividendsOrDistributions15.110.87.513.28.810.15.413.2

us-gaap:GainLossOnDispositionOfAssets1

us-gaap:GainLossOnDispositionOfAssets1


Gain
Period End2021-06-302021-03-312020-12-312020-09-302020-06-30
Value135000.0-3763000.0-2689000.00-240000.0
Percentage of GainLossOnDispositionOfAssets1100.0100.0100.00.0100.0

us-gaap:GainLossOnDispositionOfAssets1 us-gaap:ConsolidationItems, us-gaap:StatementBusinessSegments

us-gaap:OperatingSegments, am:GatheringAndCompression


Gain
Period End2021-06-30
Value135000.0
Percentage of GainLossOnDispositionOfAssets1100.0

us-gaap:OperatingSegments, amgp:GatheringAndCompression


Gain
Period End2021-03-31
Value-3763000.0
Percentage of GainLossOnDispositionOfAssets1100.0

us-gaap:OperatingSegments, amgp:WaterHandling


Gain
Period End2020-09-302020-06-30
Value0-240000.0
Percentage of GainLossOnDispositionOfAssets10.0100.0

us-gaap:GoodwillImpairmentLoss

us-gaap:GoodwillImpairmentLoss


Goodwill
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-30
Value0.00.00.057529643
Percentage of GoodwillImpairmentLoss0.00.00.0100.0100.0100.0

us-gaap:GoodwillImpairmentLoss us-gaap:ConsolidationItems, us-gaap:StatementBusinessSegments

us-gaap:OperatingSegments, amgp:GatheringAndCompression


Goodwill
Period End2020-09-302020-06-302020-03-31
Value0.00.0575
Percentage of GoodwillImpairmentLoss0.00.0100.0

us-gaap:ImpairmentOfLongLivedAssetsHeldForUse

us-gaap:ImpairmentOfLongLivedAssetsHeldForUse


Impairment
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-31
Value0.01.3799.179-0.0830.08389
Percentage of ImpairmentOfLongLivedAssetsHeldForUse0.0100.0100.0100.0100.0100.0

us-gaap:ImpairmentOfLongLivedAssetsHeldForUse us-gaap:ConsolidationItems, us-gaap:StatementBusinessSegments

us-gaap:OperatingSegments, amgp:GatheringAndCompression


Impairment
Period End2021-03-31
Value1.218
Percentage of ImpairmentOfLongLivedAssetsHeldForUse88.3

us-gaap:OperatingSegments, amgp:WaterHandling


Impairment
Period End2021-03-312020-03-31
Value0.16189
Percentage of ImpairmentOfLongLivedAssetsHeldForUse11.7100.1

us-gaap:ImpairmentOfLongLivedAssetsToBeDisposedOf

us-gaap:ImpairmentOfLongLivedAssetsToBeDisposedOf


Impairment
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-30
Value0.9470.0891.2974070.594
Percentage of ImpairmentOfLongLivedAssetsToBeDisposedOf100.00.0100.0100.0100.0100.0

us-gaap:ImpairmentOfLongLivedAssetsToBeDisposedOf us-gaap:ConsolidationItems, us-gaap:StatementBusinessSegments

us-gaap:OperatingSegments, amgp:GatheringAndCompression


Impairment
Period End2020-09-302019-12-312019-09-302019-06-30
Value0.9470.00.00.592
Percentage of ImpairmentOfLongLivedAssetsToBeDisposedOf100.00.00.099.7

us-gaap:OperatingSegments, amgp:WaterHandling


Impairment
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-30
Value0.00.0891.2974070.002
Percentage of ImpairmentOfLongLivedAssetsToBeDisposedOf0.00.0100.0100.0100.00.3

us-gaap:IncomeLossFromEquityMethodInvestments

us-gaap:IncomeLossFromEquityMethodInvestments


Income
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-31
Value2120232320191618132.8843373328231915117.5564.8072.7311.85
Percentage of IncomeLossFromEquityMethodInvestments100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

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

us-gaap:OperatingSegments, am:GatheringAndCompression


Income
Period End2021-06-302020-06-30
Value2120
Percentage of IncomeLossFromEquityMethodInvestments100.0100.0

us-gaap:OperatingSegments, amgp:GatheringAndCompression


Income
Period End2021-03-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-31
Value202320191618132.88
Percentage of IncomeLossFromEquityMethodInvestments100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:IncomeLossFromEquityMethodInvestments us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName

amgp:AppalachiaJointVenture


Income
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-31
Value19212119171516142.573
Percentage of IncomeLossFromEquityMethodInvestments93.092.191.691.592.896.192.0106.589.3

amgp:StonewallGasGatheringLLC


Income
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-31
Value1.4431.8261.9381.7841.3760.6351.4822.00.307
Percentage of IncomeLossFromEquityMethodInvestments7.07.98.48.57.23.98.014.710.7

us-gaap:IncreaseDecreaseInAccruedLiabilities

us-gaap:IncreaseDecreaseInAccruedLiabilities


Increase
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-09-302016-06-302016-03-31
Value10916000.0-18213000.037098000.0-28539000.021151000.0-42852000.028329000.0-4278000.016919000.0-32289000.0-475000.0140000.0-59000.0565000.0-375000.0-872000.0-117000.01174000.0205000.0105000.040000.0
Percentage of IncreaseDecreaseInAccruedLiabilities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:IncreaseDecreaseInDueFromAffiliatesCurrent

us-gaap:IncreaseDecreaseInDueFromAffiliatesCurrent


Increase
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-31
Value1.22315-10.2257.86-14.481-10.46-4.1530.083-7.083-31.331
Percentage of IncreaseDecreaseInDueFromAffiliatesCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:IncreaseDecreaseInDueToAffiliates

us-gaap:IncreaseDecreaseInDueToAffiliates


Increase
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-06-302018-03-31
Value1311000.0-935000.01433000.0-285000.01038000.0-1470000.0-1600000.0-1476000.01417000.0-444000.09000.0-15000.0
Percentage of IncreaseDecreaseInDueToAffiliates100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:IncreaseDecreaseInIncomeTaxesReceivable

us-gaap:IncreaseDecreaseInIncomeTaxesReceivable


Increase
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-31
Value0.0-16.311-0.2960.0-38.9156
Percentage of IncreaseDecreaseInIncomeTaxesReceivable0.0100.0100.00.0100.0100.0

us-gaap:IncreaseDecreaseInOtherCurrentAssets

us-gaap:IncreaseDecreaseInOtherCurrentAssets


Increase
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value-477000.0-593000.0881000.0-106000.0-413000.0-517000.0-1453000.0-79000.0-494000.02361000.0-51000.0-918000.0819000.0155000.0
Percentage of IncreaseDecreaseInOtherCurrentAssets100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:IncreaseDecreaseInOtherNoncurrentAssets

us-gaap:IncreaseDecreaseInOtherNoncurrentAssets


Increase
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-31
Value00358000.0-2296000.02437000.0-963000.0-2642000.0267000.0
Percentage of IncreaseDecreaseInOtherNoncurrentAssets0.00.0100.0100.0100.0100.0100.0100.0

us-gaap:IncrementalCommonSharesAttributableToConversionOfPreferredStock

us-gaap:IncrementalCommonSharesAttributableToConversionOfPreferredStock


Incremental
Period End2021-06-302021-03-312020-09-302020-06-302019-06-30
Value962000.01107000.01862000.01961000.0873000.0
Percentage of IncrementalCommonSharesAttributableToConversionOfPreferredStock100.0100.0100.0100.0100.0

us-gaap:IncrementalCommonSharesAttributableToShareBasedPaymentArrangements

us-gaap:IncrementalCommonSharesAttributableToShareBasedPaymentArrangements


Incremental
Period End2020-09-302020-06-302019-06-30
Value254000.040000.078000.0
Percentage of IncrementalCommonSharesAttributableToShareBasedPaymentArrangements100.0100.0100.0

us-gaap:IncrementalCommonSharesAttributableToShareBasedPaymentArrangements us-gaap:AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareByAntidilutiveSecurities

us-gaap:PhantomShareUnitsPSUs


Incremental
Period End2021-06-302021-03-31
Value215000.0278000.0
Percentage of IncrementalCommonSharesAttributableToShareBasedPaymentArrangements0.00.0

us-gaap:RestrictedStockUnitsRSU


Incremental
Period End2021-06-302021-03-312020-06-30
Value1063000.01037000.040000.0
Percentage of IncrementalCommonSharesAttributableToShareBasedPaymentArrangements0.00.0100.0

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

us-gaap:LineOfCreditFacilityUnusedCapacityCommitmentFeePercentage

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


Line
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-31
Value00.37500.3712500.003750000.00375
Percentage of LineOfCreditFacilityUnusedCapacityCommitmentFeePercentage0.0100.00.0100.00.0100.00.00.00.0100.0

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


Line
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-31
Value00.2500.247500.0025-0.00075000.0025
Percentage of LineOfCreditFacilityUnusedCapacityCommitmentFeePercentage0.066.70.066.70.066.70.00.00.066.7

us-gaap:PaymentForContingentConsiderationLiabilityFinancingActivities

us-gaap:PaymentForContingentConsiderationLiabilityFinancingActivities


Payment
Period End2020-12-312020-09-302020-06-302020-03-31
Value0.00.00.0116
Percentage of PaymentForContingentConsiderationLiabilityFinancingActivities0.00.00.0100.0

us-gaap:PaymentForContingentConsiderationLiabilityOperatingActivities

us-gaap:PaymentForContingentConsiderationLiabilityOperatingActivities


Payment
Period End2020-12-312020-09-302020-06-302020-03-31
Value0008076000.0
Percentage of PaymentForContingentConsiderationLiabilityOperatingActivities0.00.00.0100.0

us-gaap:PaymentsOfDividendsPreferredStockAndPreferenceStock

us-gaap:PaymentsOfDividendsPreferredStockAndPreferenceStock


Payments
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-30
Value137000.0138000.0137000.0138000.0137000.0138000.0139000.0137000.0
Percentage of PaymentsOfDividendsPreferredStockAndPreferenceStock100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:PaymentsOfDividendsPreferredStockAndPreferenceStock us-gaap:StatementClassOfStock

us-gaap:PreferredClassA


Payments
Period End2021-05-172021-02-162020-11-162020-08-142020-05-152020-02-14
Value137000.0138000.0137000.0138000.0137000.0138000.0
Percentage of PaymentsOfDividendsPreferredStockAndPreferenceStock0.00.00.00.00.00.0

us-gaap:PaymentsOfFinancingCosts

us-gaap:PaymentsOfFinancingCosts


Payments
Period End2021-06-302021-03-312019-12-312019-09-302018-12-312018-09-30
Value8212000.0543000.0371000.01571000.00215000.0
Percentage of PaymentsOfFinancingCosts100.0100.0100.0100.00.0100.0

us-gaap:PaymentsRelatedToTaxWithholdingForShareBasedCompensation

us-gaap:PaymentsRelatedToTaxWithholdingForShareBasedCompensation


Payments
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-30
Value2776000.01541000.010000.074000.0366000.026000.07000.0180000.0
Percentage of PaymentsRelatedToTaxWithholdingForShareBasedCompensation100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:PaymentsToAcquireInterestInJointVenture

us-gaap:PaymentsToAcquireInterestInJointVenture


Payments
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-31
Value0.2090.7570.4652.814101137133765
Percentage of PaymentsToAcquireInterestInJointVenture100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:PreferredStockAmountOfPreferredDividendsInArrears us-gaap:StatementClassOfStock

us-gaap:PreferredStockAmountOfPreferredDividendsInArrears

us-gaap:PreferredClassA


Preferred
Period End2021-06-302021-03-312020-12-31
Value069000.00
Percentage of PreferredStockAmountOfPreferredDividendsInArrears0.0100.00.0

us-gaap:ProceedsFromIncomeTaxRefunds

us-gaap:ProceedsFromIncomeTaxRefunds


Proceeds
Period End2020-12-31
Value0.0
Percentage of ProceedsFromIncomeTaxRefunds0.0

us-gaap:ProceedsFromPaymentsForOtherFinancingActivities

us-gaap:ProceedsFromPaymentsForOtherFinancingActivities


Proceeds
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-30
Value-10000.0-11000.0-10000.0-39000.0-55000.0-56000.0-50000.0-53000.0
Percentage of ProceedsFromPaymentsForOtherFinancingActivities100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ProceedsFromRepaymentsOfLinesOfCredit

us-gaap:ProceedsFromRepaymentsOfLinesOfCredit


Proceeds
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-31
Value-110.811-574.032-15.5211234131-505.525
Percentage of ProceedsFromRepaymentsOfLinesOfCredit100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ProceedsFromSaleOfProductiveAssets

us-gaap:ProceedsFromSaleOfProductiveAssets


Proceeds
Period End2021-06-302021-03-312020-12-312020-09-30
Value134000.01493000.0699000.00
Percentage of ProceedsFromSaleOfProductiveAssets100.0100.0100.00.0

us-gaap:RelatedPartyTransactionSellingGeneralAndAdministrativeExpensesFromTransactionsWithRelatedParty us-gaap:RelatedPartyTransactionsByRelatedParty

us-gaap:RelatedPartyTransactionSellingGeneralAndAdministrativeExpensesFromTransactionsWithRelatedParty

am:AnteroResourcesCorporation


Related
Period End2021-06-302020-06-30
Value7.06.0
Percentage of RelatedPartyTransactionSellingGeneralAndAdministrativeExpensesFromTransactionsWithRelatedParty100.0100.0

amgp:AnteroResourcesCorporation


Related
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value9.06.65.66.46.39.59.6111.60.10.10.10.1
Percentage of RelatedPartyTransactionSellingGeneralAndAdministrativeExpensesFromTransactionsWithRelatedParty0.00.00.0106.70.00.00.00.00.00.00.00.00.0

us-gaap:ResultsOfOperationsAccretionOfAssetRetirementObligations

us-gaap:ResultsOfOperationsAccretionOfAssetRetirementObligations


Results
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-31
Value114000.0119000.038000.039000.061000.042000.054000.054000.069000.010000.0
Percentage of ResultsOfOperationsAccretionOfAssetRetirementObligations100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ResultsOfOperationsAccretionOfAssetRetirementObligations us-gaap:ConsolidationItems, us-gaap:StatementBusinessSegments

us-gaap:OperatingSegments, am:WaterHandling


Results
Period End2021-06-302020-06-30
Value114000.061000.0
Percentage of ResultsOfOperationsAccretionOfAssetRetirementObligations100.0100.0

us-gaap:OperatingSegments, amgp:WaterHandling


Results
Period End2021-03-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-31
Value119000.039000.061000.042000.054000.054000.069000.010000.0
Percentage of ResultsOfOperationsAccretionOfAssetRetirementObligations100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeituresWeightedAverageGrantDateFairValue us-gaap:AwardType

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeituresWeightedAverageGrantDateFairValue

amgp:AmcLtip


Share
Period End2021-03-312020-12-31
Value7.27-0.06
Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeituresWeightedAverageGrantDateFairValue100.0100.0

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue us-gaap:AwardType

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue

amgp:AmcLtip


Share
Period End2020-12-31
Value-0.02
Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue100.0

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodWeightedAverageGrantDateFairValue us-gaap:AwardType

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodWeightedAverageGrantDateFairValue

amgp:AmcLtip


Share
Period End2021-03-312020-12-31
Value7.46-0.02
Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodWeightedAverageGrantDateFairValue100.0100.0

us-gaap:StockGrantedDuringPeriodValueSharebasedCompensation

us-gaap:StockGrantedDuringPeriodValueSharebasedCompensation


Stock
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-31
Value3.0594.0123.6782.6973.33820214.3897.7957.7777.777
Percentage of StockGrantedDuringPeriodValueSharebasedCompensation100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:StockGrantedDuringPeriodValueSharebasedCompensation us-gaap:StatementEquityComponents

us-gaap:AdditionalPaidInCapital


Stock
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-31
Value3.0594.0123.6782.6973.33820214.389
Percentage of StockGrantedDuringPeriodValueSharebasedCompensation100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:StockIssuedDuringPeriodSharesShareBasedCompensation us-gaap:StatementEquityComponents

us-gaap:StockIssuedDuringPeriodSharesShareBasedCompensation

us-gaap:CommonStock


Stock
Period End2020-09-302020-06-302020-03-312019-09-302019-06-30
Value111000.0311000.043000.049000.0206000.0
Percentage of StockIssuedDuringPeriodSharesShareBasedCompensation100.0100.0100.0100.0100.0

us-gaap:StockIssuedDuringPeriodValueShareBasedCompensation

us-gaap:StockIssuedDuringPeriodValueShareBasedCompensation


Stock
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-09-302019-06-30
Value-2776000.0-1541000.0-74000.0-366000.0-26000.0-178000.0-1828000.0
Percentage of StockIssuedDuringPeriodValueShareBasedCompensation100.0100.0100.0100.0100.0100.0100.0

us-gaap:StockIssuedDuringPeriodValueShareBasedCompensation us-gaap:StatementEquityComponents

us-gaap:AdditionalPaidInCapital


Stock
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-09-302019-06-30
Value-2781000.0-1544000.0-75000.0-370000.0-26000.0-179000.0-1830000.0
Percentage of StockIssuedDuringPeriodValueShareBasedCompensation100.2100.2101.4101.1100.0100.6100.1

us-gaap:CommonStock


Stock
Period End2021-06-302021-03-312020-09-302020-06-302019-09-302019-06-30
Value5000.03000.01000.04000.01000.02000.0
Percentage of StockIssuedDuringPeriodValueShareBasedCompensation-0.2-0.2-1.4-1.1-0.6-0.1

am:AccruedCapitalExpendituresCurrent

am:AccruedCapitalExpendituresCurrent


Accrued
Period End2021-06-302020-12-31
Value2611
Percentage of AccruedCapitalExpendituresCurrent100.0100.0

am:AccruedOperatingExpensesCurrent

am:AccruedOperatingExpensesCurrent


Accrued
Period End2021-06-302020-12-31
Value1010
Percentage of AccruedOperatingExpensesCurrent100.0100.0

am:AccruedProductionTaxes

am:AccruedProductionTaxes


Accrued
Period End2021-06-302020-12-31
Value5601000.03368000.0
Percentage of AccruedProductionTaxes100.0100.0

am:CashAwardsAccrued us-gaap:AwardType

am:CashAwardsAccrued

am:AmcLtip


Cash
Period End2021-06-30
Value1100000.0
Percentage of CashAwardsAccrued100.0

am:FiniteLivedIntangibleAssetsAmortizationExpenseYearFiveAndAfterYearFive

am:FiniteLivedIntangibleAssetsAmortizationExpenseYearFiveAndAfterYearFive


Finite
Period End2021-06-30
Value1074
Percentage of FiniteLivedIntangibleAssetsAmortizationExpenseYearFiveAndAfterYearFive100.0

am:NumberOfMilesPipelinesOperated us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName

am:NumberOfMilesPipelinesOperated

am:StonewallGasGatheringLLC


Number
Period End2021-06-30
Value67.0
Percentage of NumberOfMilesPipelinesOperated100.0

am:ReceivablesFromContractsWithCustomers

am:ReceivablesFromContractsWithCustomers


Receivables
Period End2021-06-302020-12-31
Value9074
Percentage of ReceivablesFromContractsWithCustomers100.0100.0

amgp:AccruedCapitalExpendituresCurrent

amgp:AccruedCapitalExpendituresCurrent


Accrued
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-31
Value11119.073162227
Percentage of AccruedCapitalExpendituresCurrent100.0100.0100.0100.0100.0100.0

amgp:AccruedOperatingExpensesCurrent

amgp:AccruedOperatingExpensesCurrent


Accrued
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-31
Value9.338109.4549.8391524
Percentage of AccruedOperatingExpensesCurrent100.0100.0100.0100.0100.0100.0

amgp:AccruedProductionTaxes

amgp:AccruedProductionTaxes


Accrued
Period End2021-03-312020-12-312019-12-31
Value2858000.03368000.02353000.0
Percentage of AccruedProductionTaxes100.0100.0100.0

amgp:CashAwardsAccrued us-gaap:AwardType

amgp:CashAwardsAccrued

amgp:AmcLtip


Cash
Period End2021-03-312020-12-312020-09-30
Value1100000.01800000.01300000.0
Percentage of CashAwardsAccrued100.0100.0100.0

amgp:FiniteLivedIntangibleAssetsAmortizationExpenseYearFiveAndAfterYearFive

amgp:FiniteLivedIntangibleAssetsAmortizationExpenseYearFiveAndAfterYearFive


Finite
Period End2021-03-31
Value1074
Percentage of FiniteLivedIntangibleAssetsAmortizationExpenseYearFiveAndAfterYearFive100.0

amgp:MinimumRevenueAmountUnderVolumeCommitments us-gaap:TypeOfArrangement

amgp:MinimumRevenueAmountUnderVolumeCommitments

amgp:GatheringAndCompressionAgreement


Minimum
Period End2020-12-31
Value1785
Percentage of MinimumRevenueAmountUnderVolumeCommitments100.0

amgp:MinimumRevenueAmountUnderVolumeCommitmentsAfterYearFive us-gaap:TypeOfArrangement

amgp:MinimumRevenueAmountUnderVolumeCommitmentsAfterYearFive

amgp:GatheringAndCompressionAgreement


Minimum
Period End2020-12-31
Value558
Percentage of MinimumRevenueAmountUnderVolumeCommitmentsAfterYearFive100.0

amgp:MinimumRevenueAmountUnderVolumeCommitmentsNextTwelveMonths us-gaap:TypeOfArrangement

amgp:MinimumRevenueAmountUnderVolumeCommitmentsNextTwelveMonths

amgp:GatheringAndCompressionAgreement


Minimum
Period End2020-12-31
Value243
Percentage of MinimumRevenueAmountUnderVolumeCommitmentsNextTwelveMonths100.0

amgp:MinimumRevenueAmountUnderVolumeCommitmentsYearFive us-gaap:TypeOfArrangement

amgp:MinimumRevenueAmountUnderVolumeCommitmentsYearFive

amgp:GatheringAndCompressionAgreement


Minimum
Period End2020-12-31
Value235
Percentage of MinimumRevenueAmountUnderVolumeCommitmentsYearFive100.0

amgp:MinimumRevenueAmountUnderVolumeCommitmentsYearFour us-gaap:TypeOfArrangement

amgp:MinimumRevenueAmountUnderVolumeCommitmentsYearFour

amgp:GatheringAndCompressionAgreement


Minimum
Period End2020-12-31
Value249
Percentage of MinimumRevenueAmountUnderVolumeCommitmentsYearFour100.0

amgp:MinimumRevenueAmountUnderVolumeCommitmentsYearThree us-gaap:TypeOfArrangement

amgp:MinimumRevenueAmountUnderVolumeCommitmentsYearThree

amgp:GatheringAndCompressionAgreement


Minimum
Period End2020-12-31
Value249
Percentage of MinimumRevenueAmountUnderVolumeCommitmentsYearThree100.0

amgp:MinimumRevenueAmountUnderVolumeCommitmentsYearTwo us-gaap:TypeOfArrangement

amgp:MinimumRevenueAmountUnderVolumeCommitmentsYearTwo

amgp:GatheringAndCompressionAgreement


Minimum
Period End2020-12-31
Value249
Percentage of MinimumRevenueAmountUnderVolumeCommitmentsYearTwo100.0

amgp:ReceivablesFromContractsWithCustomers

amgp:ReceivablesFromContractsWithCustomers


Receivables
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-31
Value89748476911011051041110.0
Percentage of ReceivablesFromContractsWithCustomers100.0100.0100.0100.0100.0100.0100.0100.0100.00.0

us-gaap:AssetRetirementObligationCurrent

us-gaap:AssetRetirementObligationCurrent


Asset
Period End2020-12-31
Value5000000.0
Percentage of AssetRetirementObligationCurrent100.0

us-gaap:DebtInstrumentCarryingAmount

us-gaap:DebtInstrumentCarryingAmount


Debt
Period End2021-06-302021-03-312020-12-312020-09-302019-12-31
Value31133124311331372909
Percentage of DebtInstrumentCarryingAmount100.0100.0100.0100.0100.0

us-gaap:DebtInstrumentCarryingAmount dei:LegalEntity, us-gaap:CreditFacility

am:AnteroMidstreamPartnersAndAnteroMidstreamFinanceCorp, am:SeniorNotesDue2024Bearing5.375Rate


Debt
Period End2020-12-31
Value650
Percentage of DebtInstrumentCarryingAmount20.9

us-gaap:DebtInstrumentCarryingAmount us-gaap:ConsolidatedEntities, us-gaap:CreditFacility

am:AnteroMidstreamPartners, us-gaap:RevolvingCreditFacility


Debt
Period End2021-06-302020-12-31
Value513613
Percentage of DebtInstrumentCarryingAmount16.519.7

amgp:AnteroMidstreamPartners, us-gaap:RevolvingCreditFacility


Debt
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-31
Value6256141200120012009607265951100
Percentage of DebtInstrumentCarryingAmount20.019.738.20.00.033.00.00.00.0

us-gaap:DebtInstrumentCarryingAmount us-gaap:CreditFacility

amgp:SeniorNotesDue2027Bearing5.75Rate


Debt
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-31
Value650650650653653653250653653653
Percentage of DebtInstrumentCarryingAmount20.820.920.70.00.022452.30.00.00.0

amgp:SeniorNotesDue2028Bearing5.75Rate


Debt
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-30
Value650650650650650650000650650
Percentage of DebtInstrumentCarryingAmount20.820.920.70.00.022340.60.00.0

us-gaap:RevolvingCreditFacility


Debt
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-31
Value6246131187115511709595007255941100
Percentage of DebtInstrumentCarryingAmount20.019.737.80.00.032978.20.00.00.0

us-gaap:SeniorNotes


Debt
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-31
Value650652652652600652652652
Percentage of DebtInstrumentCarryingAmount20.70.00.022430.00.00.00.0

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

us-gaap:DebtInstrumentFaceAmount

am:AnteroMidstreamPartnersAndAnteroMidstreamFinanceCorp, am:SeniorNotesDue2026Bearing7.875Rate


Debt
Period End2020-11-10
Value550
Percentage of DebtInstrumentFaceAmount100.0

amgp:AnteroMidstreamPartnersAndAnteroMidstreamFinanceCorp, amgp:SeniorNotesDue2026Bearing7.875Rate


Debt
Period End2020-11-10
Value550
Percentage of DebtInstrumentFaceAmount100.0

us-gaap:DebtInstrumentFairValue us-gaap:CreditFacility, us-gaap:FairValueByFairValueHierarchyLevel

us-gaap:DebtInstrumentFairValue

am:SeniorNotesDue2024Bearing5.375Rate, us-gaap:FairValueInputsLevel2


Debt
Period End2020-12-31
Value633
Percentage of DebtInstrumentFairValue100.0

am:SeniorNotesDue2026Bearing7.875Rate, us-gaap:FairValueInputsLevel2


Debt
Period End2021-06-302020-12-31
Value614569
Percentage of DebtInstrumentFairValue0.089.8

am:SeniorNotesDue2027Bearing5.75Rate, us-gaap:FairValueInputsLevel2


Debt
Period End2021-06-302020-12-31
Value674637
Percentage of DebtInstrumentFairValue0.0100.5

am:SeniorNotesDue2028Bearing5.75Rate, us-gaap:FairValueInputsLevel2


Debt
Period End2021-06-302020-12-31
Value681624
Percentage of DebtInstrumentFairValue0.098.5

am:SeniorNotesDue2029Bearing5.375Rate, us-gaap:FairValueInputsLevel2


Debt
Period End2021-06-30
Value781
Percentage of DebtInstrumentFairValue0.0

amgp:SeniorNotesDue2024Bearing5.375Rate, us-gaap:FairValueInputsLevel2


Debt
Period End2021-03-312020-12-312019-12-31
Value656633602
Percentage of DebtInstrumentFairValue0.0100.00.0

amgp:SeniorNotesDue2026Bearing7.875Rate, us-gaap:FairValueInputsLevel2


Debt
Period End2021-03-312020-12-31
Value591569
Percentage of DebtInstrumentFairValue0.089.8

amgp:SeniorNotesDue2027Bearing5.75Rate, us-gaap:FairValueInputsLevel2


Debt
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-31
Value650637536520416571542650660
Percentage of DebtInstrumentFairValue0.0100.50.00.00.00.00.00.00.0

amgp:SeniorNotesDue2028Bearing5.75Rate, us-gaap:FairValueInputsLevel2


Debt
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-30
Value647624533517416569535644
Percentage of DebtInstrumentFairValue0.098.50.00.00.00.00.00.0

us-gaap:SeniorNotes, us-gaap:FairValueInputsLevel2


Debt
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-31
Value275225452464554553458603585651655
Percentage of DebtInstrumentFairValue0.00.0388.80.00.00.00.00.00.00.0

us-gaap:DebtInstrumentUnamortizedPremium

us-gaap:DebtInstrumentUnamortizedPremium


Debt
Period End2021-06-302021-03-312020-12-312020-09-302019-12-31
Value2311000.04045000.04261000.04483000.05142000.0
Percentage of DebtInstrumentUnamortizedPremium100.0100.0100.0100.0100.0

us-gaap:DebtWeightedAverageInterestRate us-gaap:ConsolidatedEntities, us-gaap:CreditFacility

us-gaap:DebtWeightedAverageInterestRate

am:AnteroMidstreamPartners, us-gaap:RevolvingCreditFacility


Debt
Period End2021-06-302020-12-31
Value1.61.66
Percentage of DebtWeightedAverageInterestRate100.0100.0

amgp:AnteroMidstreamPartners, us-gaap:RevolvingCreditFacility


Debt
Period End2021-03-312020-12-312020-09-302020-06-302019-12-31
Value1.611.661.660.01690.0315
Percentage of DebtWeightedAverageInterestRate0.0100.00.00.00.0

us-gaap:DeferredCompensationArrangementWithIndividualCashAwardGrantedAmount us-gaap:AwardType

us-gaap:DeferredCompensationArrangementWithIndividualCashAwardGrantedAmount

am:AmcLtip


Deferred
Period End2020-07-312020-01-31
Value700000.02200000.0
Percentage of DeferredCompensationArrangementWithIndividualCashAwardGrantedAmount100.0100.0

amgp:AmcLtip


Deferred
Period End2020-07-312020-01-31
Value700000.02200000.0
Percentage of DeferredCompensationArrangementWithIndividualCashAwardGrantedAmount100.0100.0

us-gaap:DeferredFinanceCostsNet

us-gaap:DeferredFinanceCostsNet


Deferred
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-31
Value28252620222223
Percentage of DeferredFinanceCostsNet100.0100.0100.0100.0100.0100.0100.0

us-gaap:DeferredIncomeTaxAssetsNet

us-gaap:DeferredIncomeTaxAssetsNet


Deferred
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312018-12-31
Value46751031251601921031.304
Percentage of DeferredIncomeTaxAssetsNet100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DeferredTaxAssetsCharitableContributionCarryforwards

us-gaap:DeferredTaxAssetsCharitableContributionCarryforwards


Deferred
Period End2020-12-312019-12-31
Value2496000.02473000.0
Percentage of DeferredTaxAssetsCharitableContributionCarryforwards100.0100.0

us-gaap:DeferredTaxAssetsGross

us-gaap:DeferredTaxAssetsGross


Deferred
Period End2020-12-312019-12-312018-12-31
Value1031031.304
Percentage of DeferredTaxAssetsGross100.0100.0100.0

us-gaap:DeferredTaxAssetsInvestmentInSubsidiaries

us-gaap:DeferredTaxAssetsInvestmentInSubsidiaries


Deferred
Period End2020-12-312019-12-31
Value3728
Percentage of DeferredTaxAssetsInvestmentInSubsidiaries100.0100.0

us-gaap:DeferredTaxAssetsOperatingLossCarryforwards

us-gaap:DeferredTaxAssetsOperatingLossCarryforwards


Deferred
Period End2020-12-312019-12-31
Value6068
Percentage of DeferredTaxAssetsOperatingLossCarryforwards100.0100.0

us-gaap:DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsShareBasedCompensationCost

us-gaap:DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsShareBasedCompensationCost


Deferred
Period End2020-12-312019-12-31
Value2590000.01298000.0
Percentage of DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsShareBasedCompensationCost100.0100.0

us-gaap:DueFromAffiliateCurrent

us-gaap:DueFromAffiliateCurrent


Due
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312017-06-302017-03-312016-12-31
Value8988738376901010.3580.2840.217
Percentage of DueFromAffiliateCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DueToAffiliateCurrent

us-gaap:DueToAffiliateCurrent


Due
Period End2021-06-302020-12-31
Value4238000.03862000.0
Percentage of DueToAffiliateCurrent100.0100.0

us-gaap:DueToRelatedPartiesCurrent

us-gaap:DueToRelatedPartiesCurrent


Due
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-31
Value2927000.03862000.02429000.02714000.01675000.03146000.04745000.05021000.03603000.0731000.0
Percentage of DueToRelatedPartiesCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedShareBasedAwardsOtherThanOptions us-gaap:AwardType

us-gaap:EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedShareBasedAwardsOtherThanOptions

am:PerformanceShareUnitAwardsBasedOnReturnOnInvestedCapital


Employee
Period End2021-06-30
Value0.4
Percentage of EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedShareBasedAwardsOtherThanOptions100.0

amgp:AmcLtip


Employee
Period End2020-12-31
Value19
Percentage of EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedShareBasedAwardsOtherThanOptions0.0

amgp:PerformanceShareUnitAwardsBasedOnReturnOnInvestedCapital


Employee
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-30
Value0.70.40.50.60.60.72.12.2
Percentage of EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedShareBasedAwardsOtherThanOptions0.00.00.00.00.00.00.00.0

us-gaap:EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedShareBasedAwardsOtherThanOptions us-gaap:RelatedPartyTransactionsByRelatedParty

am:AnteroResourcesCorporation


Employee
Period End2021-06-30
Value2.9
Percentage of EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedShareBasedAwardsOtherThanOptions725.0

am:MidstreamLongTermIncentivePlan


Employee
Period End2021-06-30
Value27
Percentage of EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedShareBasedAwardsOtherThanOptions6775.0

amgp:AnteroResourcesCorporation


Employee
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-31
Value4.48.0111519326449
Percentage of EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedShareBasedAwardsOtherThanOptions0.00.00.00.00.00.00.00.0

amgp:MidstreamLongTermIncentivePlan


Employee
Period End2021-03-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-31
Value1621151813151811
Percentage of EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedShareBasedAwardsOtherThanOptions0.00.00.00.00.00.00.00.0

us-gaap:EquityMethodInvestmentOwnershipPercentage us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName

us-gaap:EquityMethodInvestmentOwnershipPercentage

am:AppalachiaJointVenture


Equity
Period End2021-06-30
Value50.0
Percentage of EquityMethodInvestmentOwnershipPercentage100.0

am:StonewallGasGatheringLLC


Equity
Period End2021-06-30
Value15.0
Percentage of EquityMethodInvestmentOwnershipPercentage30.0

amgp:AppalachiaJointVenture


Equity
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-31
Value50.050.050.00.50.50.50.50.5
Percentage of EquityMethodInvestmentOwnershipPercentage0.00.00.00.00.00.00.00.0

amgp:StonewallGasGatheringLLC


Equity
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-31
Value15.015.015.00.150.150.150.150.150.15
Percentage of EquityMethodInvestmentOwnershipPercentage0.00.00.00.00.00.00.00.00.0

us-gaap:FiniteLivedIntangibleAssetsAmortizationExpenseAfterYearFive us-gaap:FiniteLivedIntangibleAssetsByMajorClass

us-gaap:FiniteLivedIntangibleAssetsAmortizationExpenseAfterYearFive

us-gaap:CustomerRelationships


Finite
Period End2020-12-312020-09-30
Value10741074
Percentage of FiniteLivedIntangibleAssetsAmortizationExpenseAfterYearFive100.0100.0

us-gaap:FiniteLivedIntangibleAssetsAmortizationExpenseRemainderOfFiscalYear

us-gaap:FiniteLivedIntangibleAssetsAmortizationExpenseRemainderOfFiscalYear


Finite
Period End2021-06-302021-03-31
Value3553
Percentage of FiniteLivedIntangibleAssetsAmortizationExpenseRemainderOfFiscalYear100.0100.0

us-gaap:FiniteLivedIntangibleAssetsAmortizationExpenseRemainderOfFiscalYear us-gaap:FiniteLivedIntangibleAssetsByMajorClass

us-gaap:CustomerRelationships


Finite
Period End2020-09-30
Value17
Percentage of FiniteLivedIntangibleAssetsAmortizationExpenseRemainderOfFiscalYear0.0

us-gaap:IncomeTaxesReceivable

us-gaap:IncomeTaxesReceivable


Income
Period End2021-06-302021-03-312020-12-312020-09-30
Value0.940.941717
Percentage of IncomeTaxesReceivable100.0100.0100.0100.0

us-gaap:InterestPayableCurrent

us-gaap:InterestPayableCurrent


Interest
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-31
Value37294613401344
Percentage of InterestPayableCurrent100.0100.0100.0100.0100.0100.0100.0

us-gaap:LineOfCreditFacilityMaximumBorrowingCapacity us-gaap:ConsolidatedEntities, us-gaap:CreditFacility

us-gaap:LineOfCreditFacilityMaximumBorrowingCapacity

am:AnteroMidstreamPartners, us-gaap:RevolvingCreditFacility


Line
Period End2021-06-30
Value2130
Percentage of LineOfCreditFacilityMaximumBorrowingCapacity100.0

amgp:AnteroMidstreamPartners, us-gaap:RevolvingCreditFacility


Line
Period End2021-03-312020-12-312020-09-302019-12-312019-09-302019-06-302019-03-31
Value2130213021302130200020002000
Percentage of LineOfCreditFacilityMaximumBorrowingCapacity0.00.00.00.00.00.00.0

us-gaap:OperatingLossCarryforwards us-gaap:IncomeTaxAuthority

us-gaap:OperatingLossCarryforwards

us-gaap:DomesticCountry


Operating
Period End2020-12-312019-12-31
Value211277
Percentage of OperatingLossCarryforwards100.0100.0

us-gaap:StateAndLocalJurisdiction


Operating
Period End2020-12-312019-12-31
Value315202
Percentage of OperatingLossCarryforwards149.372.9

us-gaap:PreferredStockSharesOutstanding us-gaap:StatementClassOfStock

us-gaap:PreferredStockSharesOutstanding

us-gaap:PreferredClassA


Preferred
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302018-12-31
Value10000.010000.010000.010000.010000.010000.010000.010000.00
Percentage of PreferredStockSharesOutstanding100.0100.0100.0100.0100.0100.0100.0100.00.0

us-gaap:RevenueRemainingPerformanceObligation us-gaap:TypeOfArrangement

us-gaap:RevenueRemainingPerformanceObligation

am:GatheringAndCompressionAgreement


Revenue
Period End2021-06-30
Value249
Percentage of RevenueRemainingPerformanceObligation100.0

amgp:GatheringAndCompressionAgreement


Revenue
Period End2021-03-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-31
Value249278013820420631726
Percentage of RevenueRemainingPerformanceObligation0.00.00.00.00.00.00.00.0

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber us-gaap:AwardType

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber

amgp:AmcLtip


Share
Period End2020-12-312020-06-302019-12-31
Value3315000.01759000.01276000.0
Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber100.0100.0100.0

amgp:PerformanceShareUnitAwardsBasedOnReturnOnInvestedCapital


Share
Period End2020-12-312019-12-312019-09-302019-06-30
Value148310.0148310.0148310.0164200.0
Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber4.511.60.00.0

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue us-gaap:AwardType

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue

am:AmcLtip


Share
Period End2021-06-302020-12-31
Value8.138.09
Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue100.0100.0

amgp:AmcLtip


Share
Period End2021-03-312020-12-312020-09-302020-06-302019-12-31
Value8.28.098.1710.4514.38
Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue0.0100.00.00.00.0

amgp:PerformanceShareUnitAwardsBasedOnReturnOnInvestedCapital


Share
Period End2020-12-312019-12-312019-09-302019-06-30
Value6.326.3214.1614.16
Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue78.10.00.00.0

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAvailableForGrant us-gaap:AwardType

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAvailableForGrant

amgp:AmcLtip


Share
Period End2020-12-31
Value11
Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAvailableForGrant100.0

us-gaap:SharebasedCompensationArrangementBySharebasedPaymentAwardEquityInstrumentsOtherThanOptionsAggregateIntrinsicValueNonvested us-gaap:AwardType

us-gaap:SharebasedCompensationArrangementBySharebasedPaymentAwardEquityInstrumentsOtherThanOptionsAggregateIntrinsicValueNonvested

amgp:AmcLtip


Sharebased
Period End2020-12-312020-09-302020-06-302019-12-31
Value25178.9719.685
Percentage of SharebasedCompensationArrangementBySharebasedPaymentAwardEquityInstrumentsOtherThanOptionsAggregateIntrinsicValueNonvested100.0100.0100.0100.0

Line plots across dimensions of each concept


Operating Margin
us-gaap:ConsolidationItems, us-gaap:StatementBusinessSegments
('us-gaap:OperatingSegments', None)
Operating  Marginus-gaap: Consolidation Items, us-gaap: Statement Business Segments
TTM Greenblatt ROC
_
(None,)
T T M  Greenblatt  R O C_
us-gaap:AllocatedShareBasedCompensationExpense
us-gaap:AwardType
(None,)
Allocated Share Based Compensation Expenseus-gaap: Award Type
us-gaap:AllocatedShareBasedCompensationExpense
us-gaap:ConsolidationItems, us-gaap:StatementBusinessSegments
('us-gaap:OperatingSegments', None)
Allocated Share Based Compensation Expenseus-gaap: Consolidation Items, us-gaap: Statement Business Segments
us-gaap:OperatingExpenses
us-gaap:ConsolidationItems, us-gaap:StatementBusinessSegments
('us-gaap:OperatingSegments', None)
Operating Expensesus-gaap: Consolidation Items, us-gaap: Statement Business Segments
us-gaap:OperatingIncomeLoss
us-gaap:ConsolidationItems, us-gaap:StatementBusinessSegments
('us-gaap:OperatingSegments', None)
Operating Income Lossus-gaap: Consolidation Items, us-gaap: Statement Business Segments
us-gaap:RevenueFromContractWithCustomerIncludingAssessedTax
us-gaap:MajorCustomers
(None,)
Revenue From Contract With Customer Including Assessed Taxus-gaap: Major Customers
us-gaap:RevenueFromContractWithCustomerIncludingAssessedTax
us-gaap:ProductOrService
(None,)
Revenue From Contract With Customer Including Assessed Taxus-gaap: Product Or Service
us-gaap:RevenueFromContractWithCustomerIncludingAssessedTax
us-gaap:ContractWithCustomerBasisOfPricing, us-gaap:StatementBusinessSegments
('us-gaap:FixedPriceContract', None)
Revenue From Contract With Customer Including Assessed Taxus-gaap: Contract With Customer Basis Of Pricing, us-gaap: Statement Business Segments
us-gaap:RevenueFromContractWithCustomerIncludingAssessedTax
us-gaap:ContractWithCustomerBasisOfPricing, us-gaap:StatementBusinessSegments
(None, 'amgp:WaterHandling')
Revenue From Contract With Customer Including Assessed Taxus-gaap: Contract With Customer Basis Of Pricing, us-gaap: Statement Business Segments
us-gaap:RevenueFromContractWithCustomerIncludingAssessedTax
us-gaap:ContractWithCustomerBasisOfPricing, us-gaap:StatementBusinessSegments
(None, 'am:WaterHandling')
Revenue From Contract With Customer Including Assessed Taxus-gaap: Contract With Customer Basis Of Pricing, us-gaap: Statement Business Segments
us-gaap:RevenueFromContractWithCustomerIncludingAssessedTax
us-gaap:ConsolidationItems, us-gaap:MajorCustomers, us-gaap:StatementBusinessSegments
('us-gaap:OperatingSegments', 'am:AnteroResourcesCorporation', None)
Revenue From Contract With Customer Including Assessed Taxus-gaap: Consolidation Items, us-gaap: Major Customers, us-gaap: Statement Business Segments
us-gaap:RevenueFromContractWithCustomerIncludingAssessedTax
us-gaap:ConsolidationItems, us-gaap:MajorCustomers, us-gaap:StatementBusinessSegments
('us-gaap:OperatingSegments', 'amgp:AnteroResourcesCorporation', None)
Revenue From Contract With Customer Including Assessed Taxus-gaap: Consolidation Items, us-gaap: Major Customers, us-gaap: Statement Business Segments
us-gaap:RevenueFromContractWithCustomerIncludingAssessedTax
us-gaap:ConsolidationItems, us-gaap:MajorCustomers, us-gaap:StatementBusinessSegments
('us-gaap:OperatingSegments', None, 'amgp:WaterHandling')
Revenue From Contract With Customer Including Assessed Taxus-gaap: Consolidation Items, us-gaap: Major Customers, us-gaap: Statement Business Segments
us-gaap:RevenueFromContractWithCustomerIncludingAssessedTax
us-gaap:ProductOrService, us-gaap:StatementBusinessSegments
(None, 'am:WaterHandling')
Revenue From Contract With Customer Including Assessed Taxus-gaap: Product Or Service, us-gaap: Statement Business Segments
us-gaap:RevenueFromContractWithCustomerIncludingAssessedTax
us-gaap:ProductOrService, us-gaap:StatementBusinessSegments
(None, 'am:GatheringAndCompression')
Revenue From Contract With Customer Including Assessed Taxus-gaap: Product Or Service, us-gaap: Statement Business Segments
us-gaap:RevenueFromContractWithCustomerIncludingAssessedTax
us-gaap:ProductOrService, us-gaap:StatementBusinessSegments
(None, 'amgp:WaterHandling')
Revenue From Contract With Customer Including Assessed Taxus-gaap: Product Or Service, us-gaap: Statement Business Segments
us-gaap:RevenueFromContractWithCustomerIncludingAssessedTax
us-gaap:ProductOrService, us-gaap:StatementBusinessSegments
(None, 'amgp:GatheringAndCompression')
Revenue From Contract With Customer Including Assessed Taxus-gaap: Product Or Service, us-gaap: Statement Business Segments
us-gaap:Revenues
us-gaap:ConsolidationItems, us-gaap:StatementBusinessSegments
('us-gaap:OperatingSegments', None)
Revenuesus-gaap: Consolidation Items, us-gaap: Statement Business Segments
us-gaap:Assets
us-gaap:ConsolidationItems, us-gaap:StatementBusinessSegments
('us-gaap:OperatingSegments', None)
Assetsus-gaap: Consolidation Items, us-gaap: Statement Business Segments
us-gaap:Assets
us-gaap:StatementBusinessSegments
(None,)
Assetsus-gaap: Statement Business Segments
us-gaap:StockholdersEquity
us-gaap:StatementEquityComponents
(None,)
Stockholders Equityus-gaap: Statement Equity Components
us-gaap:PropertyPlantAndEquipmentGross
us-gaap:PropertyPlantAndEquipmentByType
(None,)
Property Plant And Equipment Grossus-gaap: Property Plant And Equipment By Type
us-gaap:AmortizationOfIntangibleAssets
us-gaap:StatementBusinessSegments
(None,)
Amortization Of Intangible Assetsus-gaap: Statement Business Segments
us-gaap:AmortizationOfIntangibleAssets
us-gaap:ConsolidationItems, us-gaap:StatementBusinessSegments
('us-gaap:OperatingSegments', None)
Amortization Of Intangible Assetsus-gaap: Consolidation Items, us-gaap: Statement Business Segments
us-gaap:InvestmentsInAffiliatesSubsidiariesAssociatesAndJointVentures
us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName
(None,)
Investments In Affiliates Subsidiaries Associates And Joint Venturesus-gaap: Schedule Of Equity Method Investment Equity Method Investee Name
us-gaap:LongTermDebt
us-gaap:CreditFacility
(None,)
Long Term Debtus-gaap: Credit Facility
us-gaap:StockholdersEquity
us-gaap:StatementEquityComponents
(None,)
Stockholders Equityus-gaap: Statement Equity Components