ETRN


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

Table of contents



us-gaap:CommonStockValue

us-gaap:CommonStockSharesIssued

us-gaap:PreferredStockSharesIssued

us-gaap:CommonStockSharesOutstanding
dei:LegalEntity, us-gaap:Ownership
us-gaap:StatementEquityComponents

us-gaap:WeightedAverageNumberOfDilutedSharesOutstanding

us-gaap:WeightedAverageNumberOfSharesOutstandingBasic

us-gaap:AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount
us-gaap:StatementClassOfStock

us-gaap:EarningsPerShareBasic

us-gaap:EarningsPerShareDiluted

us-gaap:ComprehensiveIncomeNetOfTax

us-gaap:ComprehensiveIncomeNetOfTaxAttributableToNoncontrollingInterest

us-gaap:ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest

us-gaap:CostsAndExpenses

us-gaap:GainsLossesOnExtinguishmentOfDebt
dei:LegalEntity, us-gaap:DebtInstrument, us-gaap:LongtermDebtType

us-gaap:IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest

us-gaap:IncomeTaxExpenseBenefit

us-gaap:InterestIncomeExpenseNet

us-gaap:InterestPaidNet

us-gaap:NetIncomeLoss

us-gaap:NetIncomeLossAttributableToNoncontrollingInterest
us-gaap:StatementClassOfStock

us-gaap:NetIncomeLossAvailableToCommonStockholdersBasic

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

us-gaap:OtherComprehensiveIncomeLossNetOfTax

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

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

us-gaap:SellingGeneralAndAdministrativeExpense

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

us-gaap:Liabilities

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

us-gaap:StockholdersEquity

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

us-gaap:CashAndCashEquivalentsAtCarryingValue

us-gaap:CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents

us-gaap:AccountsReceivableNetCurrent

us-gaap:OtherAssetsCurrent

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

us-gaap:PropertyPlantAndEquipmentGross

us-gaap:AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment

us-gaap:AmortizationOfIntangibleAssets

us-gaap:PropertyPlantAndEquipmentNet

us-gaap:InvestmentsInAffiliatesSubsidiariesAssociatesAndJointVentures

us-gaap:Goodwill
us-gaap:ReportingUnit

us-gaap:IntangibleAssetsNetExcludingGoodwill

us-gaap:FiniteLivedIntangibleAssetsNet
us-gaap:BusinessAcquisition

us-gaap:OperatingLeaseRightOfUseAsset

us-gaap:OtherAssetsNoncurrent

us-gaap:AccountsPayableCurrent

us-gaap:AccruedLiabilitiesCurrent

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

us-gaap:LongTermDebtCurrent

us-gaap:OperatingLeaseLiabilityCurrent
us-gaap:FairValueByMeasurementBasis, us-gaap:LongtermDebtType
us-gaap:LongTermDebtNoncurrent
us-gaap:LongtermDebtType

us-gaap:DeferredIncomeTaxLiabilitiesNet

us-gaap:MinorityInterest

us-gaap:OtherLiabilitiesNoncurrent

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearTwo

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearThree

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearFour

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearFive

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueAfterYearFive

us-gaap:OperatingLeaseLiability

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDue

us-gaap:LesseeOperatingLeaseLiabilityUndiscountedExcessAmount

us-gaap:StockholdersEquity

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

us-gaap:CommonStockValue

us-gaap:RetainedEarningsAccumulatedDeficit

us-gaap:AccumulatedOtherComprehensiveIncomeLossNetOfTax

us-gaap:MinorityInterest

us-gaap:MinorityInterestDecreaseFromDistributionsToNoncontrollingInterestHolders
us-gaap:StatementEquityComponents

us-gaap:NetCashProvidedByUsedInOperatingActivities

us-gaap:NetCashProvidedByUsedInInvestingActivities

us-gaap:NetCashProvidedByUsedInFinancingActivities

us-gaap:CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect

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

us-gaap:IncreaseDecreaseInAccountsPayable

us-gaap:IncreaseDecreaseInOtherOperatingCapitalNet

us-gaap:NetCashProvidedByUsedInOperatingActivities

us-gaap:NetIncomeLoss

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

us-gaap:ShareBasedCompensation

us-gaap:NetCashProvidedByUsedInInvestingActivities

us-gaap:PaymentsToAcquirePropertyPlantAndEquipment

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

us-gaap:NetCashProvidedByUsedInFinancingActivities

us-gaap:ProceedsFromIssuanceOfLongTermDebt

us-gaap:PaymentsOfDividendsCommonStock

us-gaap:PaymentsForRepurchaseOfCommonStock

us-gaap:EffectiveIncomeTaxRateContinuingOperations

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice
us-gaap:BusinessAcquisition
etrn:BusinessCombinationProvisionalInformationInitialAccountingIncompleteAdjustmentAssets
us-gaap:BusinessAcquisition
etrn:BusinessCombinationProvisionalInformationInitialAccountingIncompleteAdjustmentCurrentLiabilities
us-gaap:BusinessAcquisition
etrn:BusinessCombinationProvisionalInformationInitialAccountingIncompleteAdjustmentDeferredTaxAssets
us-gaap:BusinessAcquisition
etrn:BusinessCombinationProvisionalInformationInitialAccountingIncompleteAdjustmentLiabilities
us-gaap:BusinessAcquisition
etrn:BusinessCombinationProvisionalInformationInitialAccountingIncompleteAdjustmentNoncontrollingInterest

etrn:ComprehensiveIncomeLossNetOfTaxAttributableToPreferredShareholders

etrn:ContractwithCustomerLiabilityAmountRecordedDuringPeriod

etrn:ContributionsDistributionsMadeToLimitedPartnerCashDistributionsReceivedPaidIncludingNoncontrollingInterest
us-gaap:DebtInstrument, us-gaap:LongtermDebtType
etrn:DebtInstrumentDebtDefaultHoldersOfOutstandingPrincipalPercentage
us-gaap:DebtInstrument, us-gaap:LongtermDebtType, us-gaap:SubsequentEventType

etrn:DeferredTaxLiabilityIncreaseInInvestmentsInPartnerships
us-gaap:ConsolidatedEntities, us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName
etrn:EquityMethodInvestmentCapitalCallNotice
us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName, us-gaap:VariableInterestEntitiesByClassificationOfEntity

etrn:EquityMethodInvestmentFairValueAssumptionDiscountRate
us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName, us-gaap:RelatedPartyTransactionsByRelatedParty
etrn:EquityMethodInvestmentOwnershipPercentageThresholdforBusinessDecisions
us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName
etrn:EquityMethodInvestmentSummarizedFinancialInformationAllowanceForFundsUsedDuringConstructionCapitalizedCostOfEquity
us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName
etrn:EquityMethodInvestmentSummarizedFinancialInformationEnvironmentalRemediationReserve
us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName
etrn:EquityMethodInvestmentSummarizedFinancialInformationInterestIncome
us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName
etrn:EquityMethodInvestmentSummarizedFinancialInformationOperatingExpenses
us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName
etrn:EquityMethodInvestmentSummarizedFinancialInformationOtherIncome
dei:LegalEntity, us-gaap:DebtInstrument, us-gaap:LongtermDebtType
etrn:LineOfCreditFacilityAverageDailyAmountOutstanding

etrn:NetIncomeLossIncludingPortionAttributableToNoncontrollingInterestExcludingTemporaryEquity
us-gaap:StatementEquityComponents

etrn:OtherComprehensiveIncomeLossIncludingReclassificationFromAOCIToRetainedEarningsAfterTax
us-gaap:StatementEquityComponents
us-gaap:BusinessAcquisition, us-gaap:CapitalUnitsByClass
etrn:PartnersCapitalAccountCumulativeDistributions
dei:LegalEntity, us-gaap:DebtInstrument, us-gaap:LongtermDebtType
etrn:PaymentOfDebtCommitmentFees
us-gaap:BusinessAcquisition
etrn:PaymentstoAcquireBusinessesNetOfEquityInterestsAcquired

etrn:RevenueRecognizedInExcessOfAmountsReceived
us-gaap:ProductOrService
us-gaap:AwardType, us-gaap:PlanName, us-gaap:SubsequentEventType
etrn:ShareBasedCompensationArrangementByShareBasedPaymentTargetAwardPayoutPercentage

etrn:ShareBasedPaymentArrangementAccruedAndAssumedCapitalExpensesAmount

etrn:TemporaryEquityDistributions

us-gaap:BusinessCombinationAcquisitionRelatedCosts
us-gaap:BusinessAcquisition
us-gaap:BusinessCombinationProvisionalInformationInitialAccountingIncompleteAdjustmentConsiderationTransferred
us-gaap:BusinessAcquisition
us-gaap:BusinessCombinationProvisionalInformationInitialAccountingIncompleteAdjustmentIntangibles
us-gaap:BusinessAcquisition
us-gaap:BusinessCombinationProvisionalInformationInitialAccountingIncompleteAdjustmentInventory
us-gaap:BusinessAcquisition
us-gaap:BusinessCombinationProvisionalInformationInitialAccountingIncompleteAdjustmentPropertyPlantAndEquipment

us-gaap:CommonStockDividendsPerShareDeclared

us-gaap:ContractWithCustomerAssetReclassifiedToReceivable
us-gaap:DebtInstrument, us-gaap:LongtermDebtType
us-gaap:DebtInstrumentRedemptionPricePercentage
us-gaap:DebtInstrument, us-gaap:LongtermDebtType, us-gaap:SubsequentEventType
dei:LegalEntity, us-gaap:DebtInstrument, us-gaap:LongtermDebtType
us-gaap:DebtRelatedCommitmentFeesAndDebtIssuanceCosts

us-gaap:DeferredIncomeTaxesAndTaxCredits

us-gaap:DerivativeGainLossOnDerivativeNet

us-gaap:DividendsCommonStock
us-gaap:StatementEquityComponents
us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName
us-gaap:EquityMethodInvestmentSummarizedFinancialInformationNetIncomeLoss
us-gaap:BusinessAcquisition
us-gaap:GoodwillImpairmentLoss
us-gaap:BusinessAcquisition
us-gaap:GoodwillPurchaseAccountingAdjustments
us-gaap:StatementBusinessSegments
us-gaap:ImpairmentOfIntangibleAssetsFinitelived

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

us-gaap:IncomeLossFromEquityMethodInvestments

us-gaap:IncreaseDecreaseInContractWithCustomerLiability
dei:LegalEntity

us-gaap:IncreaseDecreaseInDeferredRevenue

us-gaap:IncreaseDecreaseInInterestPayableNet

us-gaap:IncreaseDecreaseInReceivables
us-gaap:AwardType
us-gaap:IncrementalCommonSharesAttributableToShareBasedPaymentArrangements

us-gaap:InterestIncomeRelatedParty
us-gaap:RelatedPartyTransactionsByRelatedParty
us-gaap:StatementClassOfStock
dei:LegalEntity, us-gaap:CreditFacility, us-gaap:DebtInstrument
us-gaap:LineOfCreditFacilityInterestRateDuringPeriod
dei:LegalEntity, us-gaap:DebtInstrument, us-gaap:LongtermDebtType
dei:LegalEntity, us-gaap:DebtInstrument, us-gaap:LongtermDebtType
us-gaap:LineOfCreditFacilityMaximumAmountOutstandingDuringPeriod

us-gaap:OtherComprehensiveIncomeDefinedBenefitPlansTaxPortionAttributableToParent

us-gaap:OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentNetOfTax

us-gaap:OtherNoncashIncomeExpense

us-gaap:OtherNonoperatingIncome

us-gaap:PartnersCapitalAccountUnitBasedCompensation
us-gaap:StatementEquityComponents
us-gaap:StatementEquityComponents
us-gaap:PartnersCapitalAccountUnitsUnitbasedCompensation

us-gaap:PaymentsOfDebtIssuanceCosts
us-gaap:StatementClassOfStock
us-gaap:PaymentsOfDividendsPreferredStockAndPreferenceStock
us-gaap:BusinessAcquisition
us-gaap:PaymentsToAcquireBusinessesGross

us-gaap:PaymentsToAcquireEquityMethodInvestments
us-gaap:ConsolidatedEntities, us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName, us-gaap:StatementScenario
us-gaap:ConsolidatedEntities, us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName, us-gaap:SubsequentEventType
us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName, us-gaap:StatementScenario, us-gaap:SubsequentEventType, us-gaap:VariableInterestEntitiesByClassificationOfEntity
us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName, us-gaap:StatementScenario, us-gaap:VariableInterestEntitiesByClassificationOfEntity
us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName, us-gaap:SubsequentEventType, us-gaap:VariableInterestEntitiesByClassificationOfEntity

us-gaap:PaymentsToAcquireInterestInJointVenture

us-gaap:PaymentsToMinorityShareholders
us-gaap:BusinessAcquisition, us-gaap:CapitalUnitsByClass
us-gaap:PreferredStockRedemptionPremium

us-gaap:ProceedsFromCollectionOfNotesReceivable
us-gaap:DebtInstrument, us-gaap:LongtermDebtType
us-gaap:ProceedsFromIssuanceOfDebt
us-gaap:DebtInstrument, us-gaap:LongtermDebtType, us-gaap:SubsequentEventType

us-gaap:ProceedsFromLinesOfCredit

us-gaap:ProvisionForLoanLeaseAndOtherLosses
us-gaap:BalanceSheetLocation

us-gaap:RepaymentsOfLinesOfCredit

us-gaap:RepaymentsOfSeniorDebt
us-gaap:RelatedPartyTransactionsByRelatedParty
us-gaap:RevenueFromRelatedParties

us-gaap:TemporaryEquityDividendsAdjustment
us-gaap:StatementClassOfStock

us-gaap:TemporaryEquityNetIncome

us-gaap:UtilitiesOperatingExpenseMaintenanceOperationsAndOtherCostsAndExpenses

us-gaap:WeightedAverageNumberDilutedSharesOutstandingAdjustment

dei:EntityCommonStockSharesOutstanding
us-gaap:BusinessAcquisition
etrn:AccruedCapitalExpenditures

etrn:AccumulatedIntangibleAssetImpairment

etrn:CapitalContributionPayable

etrn:ContractAssetsRelatedParties
us-gaap:BusinessAcquisition
etrn:GasAndOilLengthOfNaturalGasPipeline
us-gaap:ConsolidatedEntities, us-gaap:BusinessAcquisition
etrn:GasandOilLengthofNaturalGasPipeline
us-gaap:PublicUtility
us-gaap:BusinessAcquisition
etrn:GoodwillNetOfPurchaseAccountingAdjustmentsBeforeImpairment
us-gaap:BalanceSheetLocation, us-gaap:RelatedPartyTransactionsByRelatedParty
etrn:InterestReceivableRelatedParties
us-gaap:ConsolidatedEntities, us-gaap:BusinessAcquisition
etrn:IssuanceofPerformanceGuarantee
us-gaap:PublicUtility
etrn:OilAndGasCompressionCapacity
us-gaap:PublicUtility
etrn:OilAndGasDailyCapacity
us-gaap:PublicUtility
etrn:OilAndGasNumberOfCompressorUnits
us-gaap:PublicUtility
etrn:OilAndGasPeakWithdrawalCapacity
us-gaap:PublicUtility
etrn:OilAndGasWorkingGasCapacity

etrn:UnbilledReceivablesRelatedPartiesCurrent

etrn:WaterSystemLengthOfWaterPipeline

us-gaap:AccountsReceivableGrossCurrent

us-gaap:AccountsReceivableRelatedParties

us-gaap:AccrualForEnvironmentalLossContingencies

us-gaap:AccruedLiabilitiesCurrentAndNoncurrent

us-gaap:AccruedRentCurrentAndNoncurrent

us-gaap:AllowanceForDoubtfulAccountsReceivable
us-gaap:BalanceSheetLocation

us-gaap:AllowanceForDoubtfulAccountsReceivableCurrent

us-gaap:AssetRetirementObligation
us-gaap:BusinessAcquisition
us-gaap:BusinessCombinationAcquisitionOfLessThan100PercentNoncontrollingInterestFairValue
us-gaap:BusinessAcquisition
us-gaap:BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedAssets
us-gaap:BusinessAcquisition
us-gaap:BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentLiabilities
us-gaap:BusinessAcquisition
us-gaap:BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedDeferredTaxAssets
us-gaap:BusinessAcquisition
us-gaap:BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedIntangibleAssetsOtherThanGoodwill
us-gaap:BusinessAcquisition
us-gaap:BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedInventory
us-gaap:BusinessAcquisition
us-gaap:BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedLiabilities
us-gaap:BusinessAcquisition
us-gaap:BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedPropertyPlantAndEquipment

us-gaap:ContractWithCustomerAssetNet

us-gaap:ContractWithCustomerLiability

us-gaap:ContractWithCustomerLiabilityNoncurrent
dei:LegalEntity, us-gaap:CreditFacility, us-gaap:DebtInstrument
us-gaap:DebtInstrumentCarryingAmount
dei:LegalEntity, us-gaap:DebtInstrument, us-gaap:LongtermDebtType
us-gaap:DebtInstrument, us-gaap:FairValueByMeasurementBasis, us-gaap:LongtermDebtType
us-gaap:FairValueByMeasurementBasis, us-gaap:LongtermDebtType
dei:LegalEntity, us-gaap:DebtInstrument
us-gaap:DebtInstrumentFaceAmount
us-gaap:DebtInstrument, us-gaap:LongtermDebtType
us-gaap:LongtermDebtType
us-gaap:DebtInstrument, us-gaap:LongtermDebtType
us-gaap:DebtInstrumentUnamortizedDiscount
us-gaap:DebtInstrument, us-gaap:LongtermDebtType, us-gaap:SubsequentEventType
dei:LegalEntity, us-gaap:DebtInstrument, us-gaap:LongtermDebtType
us-gaap:DeferredFinanceCostsNet
dei:LegalEntity, us-gaap:DebtInstrument, us-gaap:LongtermDebtType, us-gaap:SubsequentEventType
us-gaap:DebtInstrument, us-gaap:LongtermDebtType
us-gaap:DebtInstrument, us-gaap:LongtermDebtType, us-gaap:SubsequentEventType

us-gaap:DeferredIncomeTaxLiabilities

us-gaap:DeferredTaxAssetsOperatingLossCarryforwards

us-gaap:DeferredTaxLiabilitiesInvestments

us-gaap:DeferredTaxLiabilitiesOther

us-gaap:DeferredTaxLiabilitiesTaxDeferredIncome
us-gaap:MeasurementInputType, us-gaap:ValuationTechnique
us-gaap:DerivativeAssetMeasurementInput
us-gaap:BalanceSheetLocation, us-gaap:DerivativeInstrumentRisk
us-gaap:DerivativeAssetsNoncurrent
us-gaap:DerivativeInstrumentRisk

us-gaap:EmployeeRelatedLiabilitiesCurrentAndNoncurrent
us-gaap:AwardType
us-gaap:AwardType
us-gaap:EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized
dei:LegalEntity, us-gaap:ConsolidatedEntities, us-gaap:Ownership, us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName
us-gaap:EquityMethodInvestmentOwnershipPercentage
dei:LegalEntity, us-gaap:ConsolidatedEntities, us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName
dei:LegalEntity, us-gaap:ConsolidatedEntities, us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName, us-gaap:StatementScenario
dei:LegalEntity, us-gaap:Ownership
dei:LegalEntity, us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName, us-gaap:StatementScenario, us-gaap:VariableInterestEntitiesByClassificationOfEntity
dei:LegalEntity, us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName, us-gaap:VariableInterestEntitiesByClassificationOfEntity
us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName, us-gaap:VariableInterestEntitiesByClassificationOfEntity
us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName
us-gaap:EquityMethodInvestmentSummarizedFinancialInformationAssets
us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName
us-gaap:EquityMethodInvestmentSummarizedFinancialInformationCurrentAssets
us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName
us-gaap:EquityMethodInvestmentSummarizedFinancialInformationCurrentLiabilities
us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName
us-gaap:EquityMethodInvestmentSummarizedFinancialInformationEquity
us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName
us-gaap:EquityMethodInvestmentSummarizedFinancialInformationLiabilitiesAndEquity
us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName
us-gaap:EquityMethodInvestmentSummarizedFinancialInformationNoncurrentAssets
us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName
us-gaap:EquityMethodInvestments

us-gaap:FiniteLivedIntangibleAssetsAccumulatedAmortization
us-gaap:BusinessAcquisition
us-gaap:BusinessAcquisition
us-gaap:FiniteLivedIntangibleAssetsAmortizationExpenseAfterYearFive
us-gaap:BusinessAcquisition
us-gaap:FiniteLivedIntangibleAssetsAmortizationExpenseNextTwelveMonths
us-gaap:BusinessAcquisition
us-gaap:FiniteLivedIntangibleAssetsAmortizationExpenseYearFive
us-gaap:BusinessAcquisition
us-gaap:FiniteLivedIntangibleAssetsAmortizationExpenseYearFour
us-gaap:BusinessAcquisition
us-gaap:FiniteLivedIntangibleAssetsAmortizationExpenseYearThree
us-gaap:BusinessAcquisition
us-gaap:FiniteLivedIntangibleAssetsAmortizationExpenseYearTwo

us-gaap:FiniteLivedIntangibleAssetsGross
us-gaap:BusinessAcquisition

us-gaap:GasImbalanceAssetLiability

us-gaap:HostingArrangementServiceContractImplementationCostCapitalizedAccumulatedAmortization

us-gaap:HostingArrangementServiceContractImplementationCostCapitalizedBeforeAccumulatedAmortization

us-gaap:InterestAndDividendsPayableCurrent

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueNextTwelveMonths
us-gaap:ConsolidatedEntities, us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName
us-gaap:LettersOfCreditOutstandingAmount
us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName
us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName, us-gaap:SubsequentEventType
dei:LegalEntity, us-gaap:DebtInstrument, us-gaap:LongtermDebtType
us-gaap:LineOfCreditFacilityMaximumBorrowingCapacity
us-gaap:DebtInstrument
us-gaap:DebtInstrument, us-gaap:SubsequentEventType
dei:LegalEntity, us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FairValueByMeasurementBasis, us-gaap:FairValueByMeasurementFrequency, us-gaap:LongtermDebtType
us-gaap:LongTermDebtFairValue
us-gaap:DebtInstrument, us-gaap:FairValueByMeasurementBasis, us-gaap:LongtermDebtType
us-gaap:FairValueByMeasurementBasis, us-gaap:LongtermDebtType

us-gaap:LongTermDebtMaturitiesRepaymentsOfPrincipalAfterYearFive

us-gaap:LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFive

us-gaap:LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFour

us-gaap:LongTermDebtMaturitiesRepaymentsOfPrincipalInYearThree

us-gaap:LongTermDebtMaturitiesRepaymentsOfPrincipalInYearTwo

us-gaap:LongTermLineOfCredit
dei:LegalEntity, us-gaap:CreditFacility, us-gaap:DebtInstrument

us-gaap:LongTermLoansPayable
dei:LegalEntity, us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FairValueByMeasurementBasis, us-gaap:RelatedPartyTransactionsByRelatedParty
us-gaap:NotesReceivableFairValueDisclosure

us-gaap:NotesReceivableRelatedParties

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

us-gaap:OtherAccruedLiabilitiesCurrentAndNoncurrent

us-gaap:PartnersCapitalAttributableToNoncontrollingInterest

us-gaap:PartnersCapitalIncludingPortionAttributableToNoncontrollingInterest

us-gaap:PreferredStockSharesOutstanding
us-gaap:PublicUtility
us-gaap:PublicUtilitiesPropertyPlantAndEquipmentAccumulatedDepreciation
us-gaap:PublicUtilityRegulatedOrUnregulatedStatus

us-gaap:PublicUtilitiesPropertyPlantAndEquipmentNet
us-gaap:PublicUtility
us-gaap:PublicUtilityRegulatedOrUnregulatedStatus
us-gaap:PublicUtility
us-gaap:PublicUtilitiesPropertyPlantAndEquipmentPlantInService
us-gaap:PublicUtilityRegulatedOrUnregulatedStatus

us-gaap:PurchaseObligation

us-gaap:RegulatoryAssets
us-gaap:RegulatoryAsset

us-gaap:RegulatoryLiabilities
us-gaap:RegulatoryLiability

us-gaap:RevenueRemainingPerformanceObligation
us-gaap:ContractWithCustomerBasisOfPricing, us-gaap:StatementBusinessSegments
us-gaap:StatementBusinessSegments

us-gaap:SeniorLongTermNotes
us-gaap:AwardType
us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue
dei:LegalEntity, us-gaap:CreditFacility, us-gaap:DebtInstrument
us-gaap:ShortTermBorrowings

us-gaap:TaxesPayableCurrentAndNoncurrent

us-gaap:TemporaryEquityCarryingAmountIncludingPortionAttributableToNoncontrollingInterests

us-gaap:TemporaryEquitySharesIssued

us-gaap:TemporaryEquitySharesOutstanding
us-gaap:ConsolidatedEntities, us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName
us-gaap:VariableInterestEntityEntityMaximumLossExposureAmount
us-gaap:ConsolidatedEntities, us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName, us-gaap:SubsequentEventType
us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName, us-gaap:StatementScenario, us-gaap:VariableInterestEntitiesByClassificationOfEntity
us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName, us-gaap:VariableInterestEntitiesByClassificationOfEntity

Plots across concepts


IncomeStatement
Other Comprehensive Income Loss Net Of Tax
Expenses
Income Tax Expense Benefit
Balance Sheet
Operating Lease Right Of Use Asset
Assets
Operating Lease Right Of Use Asset
Current Assets
Prepaid Expense And Other Assets Current
NonCurrent Assets
Operating Lease Right Of Use Asset
PropertyPlantAndEquipmentNet
Accumulated Depreciation Depletion And Amortization Property Plant And Equipment
Liabilities
Operating Lease Liability
Current Liabilities
Operating Lease Liability Current
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 Payable
NetCashProvidedByUsedInInvestingActivities
Net Cash Provided By Used In Investing Activities
NetCashProvidedByUsedInFinancingActivities
Net Cash Provided By Used In Financing Activities
Shares
Common Stock Shares Issued
DividendsAndRepurchase
Payments For Repurchase Of Common Stock
OperatingLeaseLiability
Operating Lease Liability Current
LesseeOperatingLeaseLiabilityPaymentsDue
Lessee Operating Lease Liability Payments Due Year Four
FiniteLivedIntangibleAssets
Finite Lived Intangible Assets Accumulated Amortization
AccountsReceivable
Allowance For Doubtful Accounts Receivable Current

Tables

  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
us-gaap:CommonStockValue █████▃▃▃▃▃▁3949.5923945.9573941.2953955.9343952.6721297.3041292.8041381.0921381.811378.673425.37NANANA0.0NANANA
us-gaap:CommonStockSharesIssued 432.505NA432.47NA0.432469229.352254.745254.744254.691254.684254.271NANANANANANANA
us-gaap:PreferredStockSharesIssued NANA30.018NANANA0.0NANANANANANANANANANANA
us-gaap:CommonStockSharesOutstanding 432.505NA432.47NA0.432469229.352254.745254.744254.691254.684254.271NANANANANANANA
us-gaap:WeightedAverageNumberOfDilutedSharesOutstanding █▁433.464433.158NA432.821260.883248.591254.94254.915254.967254.827254.432255.033255.033255.033254.432255.033255.033255.033
us-gaap:WeightedAverageNumberOfSharesOutstandingBasic █▁433.003432.983NA432.773260.883248.591254.94254.915254.917254.776254.432254.432254.432254.432254.432254.432254.432254.432
us-gaap:AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount ▁█30.01830.076NA30.0995.047NANA0.018540.0494580.050876NANA0.6016220.601622NANANANA
us-gaap:EarningsPerShareBasic ▆▇▇█▇▇▁▅▇▇▅███▄▇▇▇0.050.130.270.350.10.28-1.05-0.260.290.22-0.190.330.40.33-0.50.130.140.13
us-gaap:EarningsPerShareDiluted ▆▇▇█▇▇▁▅▇▇▅███▄▇▇▇0.050.130.280.350.10.28-1.05-0.260.290.22-0.190.320.40.32-0.50.130.130.13
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
 Operating Margin us-gaap:ConsolidationItems,us-gaap:StatementBusinessSegments us-gaap:OperatingSegments,etrn:GasGatheringSegment▅▆▆▅▅███▇▆▆▆▅▅▃▁239.952250.076248.052232.651221.531310.047312.893299.491285.666261.881265.63252.861241.189237.39178.971116.522NANA
 Operating Margin us-gaap:ConsolidationItems,us-gaap:StatementBusinessSegments us-gaap:OperatingSegments,etrn:GasTransmissionSegment▃█▆▃▁▇▅▁▃█▅▂▂▇▅▂92.898111.419104.96793.32988.925106.615100.59487.29992.767109.859101.37289.3589.145106.93499.80289.771NANA
 Operating Margin us-gaap:ConsolidationItems,us-gaap:StatementBusinessSegments us-gaap:OperatingSegments,etrn:WaterServices▂▂▁▄▅▆▁▃▄▂▂▃█▄▁15.44518.50114.10324.0230.13436.45112.37221.64427.73418.04217.78922.37344.36326.70213.605NANANA
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
 TTM Greenblatt ROC _ _▆█▇▇▇█▁▄▇█▄▇██▆132.953225.58206.673200.509175.297242.082-311.763-38.453166.175260.041-59.446218.322234.868249.34118.494NANANA
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
us-gaap:ComprehensiveIncomeNetOfTax ▆▆▇█▆▇▁▄▇▆▅▇▇▇22.5258.089117.519149.86827.0269.762-269.003-65.80474.54356.004-49.73282.825101.06782.729NANANANA
us-gaap:ComprehensiveIncomeNetOfTaxAttributableToNoncontrollingInterest ▃▃▃▃▆▇▁▃▅█▁▇▇█3.0083.9144.1473.97386.964119.828-64.7784.33655.959143.267-69.817103.141118.54141.015NANANANA
us-gaap:ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest ▆▆▇▇▇█▁▄▇█▄███40.15676.631136.294168.469143.488189.59-333.781-61.468130.502199.271-119.549185.966219.607223.744NANANANA
us-gaap:CostsAndExpenses ▃▂▂▂▂▃█▅▃▂▅▂▂▂▂▁215.342154.416160.449149.491165.293211.031737.622446.887239.992129.741444.237146.262139.829121.686173.88465.011NANA
us-gaap:GainsLossesOnExtinguishmentOfDebt █▁███▄0.0-41.0250.00.00.0-24.864NANA0.00.0NANANANANANANANA
 us-gaap:GainsLossesOnExtinguishmentOfDebt dei:LegalEntity,us-gaap:DebtInstrument,us-gaap:LongtermDebtType etrn:EQTMidstreamPartnersLP,etrn:EQM4.75SeniorNotesDue2023,us-gaap:SeniorNotes█▁0.0-41.0NANANANANANANANANANANANANANANANA
us-gaap:IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest ▆▆▇▇▇█▁▄▇█▄▇██▆▇52.68597.013160.072196.879177.725208.699-328.68-59.541141.95232.016-78.292198.892226.866246.953116.184137.734NANA
us-gaap:IncomeTaxExpenseBenefit ▂▂▂▂▃▂▁▁▁▃▃▂▁▂█▂12.56420.41623.48528.4434.26719.1394.8361.94811.4732.4539.74812.9267.25923.209144.04522.283NANA
us-gaap:InterestIncomeExpenseNet ▁▁▂▂▃▃▃▃▄▄▅▆▇███-95.642-95.144-87.42-86.411-66.795-66.754-67.927-65.606-61.713-60.949-46.606-36.862-19.884-12.102-9.931-10.21NANA
us-gaap:InterestPaidNet ▁█▂▆▂▆▂▆▂▆▁▁▂▁▁17.76140.19927.38495.9731.60594.34333.80895.71529.07298.4711.4349.08220.04113.53212.704NANANA
us-gaap:NetIncomeLoss ▆▇▇█▆▆▁▄▇▆▅▇▇▇▃▆▆▆37.11372.683117.812164.46656.49469.732-268.738-65.82574.52156.299-48.22382.825101.06782.729-127.12533.33434.36632.269
us-gaap:NetIncomeLossAttributableToNoncontrollingInterest ▃▃▃▃▆▇▁▃▅█▁▇▇█▇▆3.0083.9144.1473.97386.964119.828-64.7784.33655.959143.267-69.817103.141118.54141.01599.26482.117NANA
us-gaap:NetIncomeLossAvailableToCommonStockholdersBasic ▆▆▇█▆▇▁▄▇22.48558.055117.812149.83826.9969.732-268.738-65.82574.521NANANANANANANANANA
us-gaap:OperatingIncomeLoss ▆█▇▇▇█▁▄▇█▄▇██▆▇▇▇132.953225.58206.673200.509175.297242.082-311.763-38.453166.175260.041-59.446218.322234.868249.34118.494141.282139.178144.096
us-gaap:OtherComprehensiveIncomeLossNetOfTax ██▇███▇██▇▁███0.0350.034-0.2930.030.030.03-0.2650.0210.022-0.295-1.5090.00.00.0NANANANA
us-gaap:ProfitLoss ▆▆▇▇▇█▁▄▇█▄███▅▇▇▇40.12176.597136.587168.439143.458189.56-333.516-61.489130.48199.566-118.04185.966219.607223.744-27.861115.451115.885118.982
us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax ▅▆▆▅▅█▇▇▇▆▆▆▆▆▄▁▁▁348.295379.996367.122350.0340.59453.113425.859408.434406.167389.782384.791364.584374.697371.026292.378206.293196.815200.072
us-gaap:SellingGeneralAndAdministrativeExpense ▆▆▆▅▅▄▄▃▄▅█▄▄▄▃▁35.48235.49435.78331.62632.82129.73929.36224.15127.22432.17841.21627.3828.2627.21326.02319.302NANA
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
us-gaap:Assets ████▇▆▆▇▇▂▂▁12806.33112788.84712725.85212630.6812445.25112189.67712041.70912575.98812436.45310275.37210523.8359942.784NANA8328.796NANANA
us-gaap:Liabilities █████▆▅▅▄▃▂▁8479.6238426.5528362.7388309.1858228.1197145.3596759.6296634.7386191.2765598.3235264.2024467.367NANA2090.032NANANA
us-gaap:LiabilitiesAndStockholdersEquity ████▇▆▆▇▇▂▂▁12806.33112788.84712725.85212630.6812445.25112189.67712041.70912575.98812436.45310275.37210523.8359942.784NANA8328.796NANANA
us-gaap:StockholdersEquity █████▁▂▃▃▃▁3169.2793207.8743210.1073172.6353084.622436.868672.7161145.0811326.2371363.165457.793NANANA1143.769NANANA
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
us-gaap:AssetsCurrent ▇██▇▆▃▃▄▂▁█▄550.566572.246561.737533.042503.174368.433375.212422.181333.274311.021568.839420.259NANA354.84NANANA
us-gaap:CashAndCashEquivalentsAtCarryingValue ▇▆▆▅▆▂▃▄▁▁█▅242.637231.911208.023182.53202.34875.96488.322153.75625.50129.049294.172184.102NANA121.004205.499NANA
us-gaap:CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents ▂▂▂▂▂▁▁▁▁▁▂▂█▂▁242.637231.911208.023182.53202.34875.96488.322153.75625.50179.049294.172184.1021847.431166.313121.004NANANA
us-gaap:AccountsReceivableNetCurrent NANA290.446NANANA255.344243.54282.805265.137255.49658.358NANA60.551NANANA
us-gaap:OtherAssetsCurrent NANA63.268NANANA31.546NANANANANANANANANANANA
us-gaap:PrepaidExpenseAndOtherAssetsCurrent ▅▅▆█▆▄▃▂▂▂▂▁53.03951.58763.26886.85562.3539.30831.54624.88524.96816.83519.17110.318NANA14.565NANANA
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
 us-gaap:AssetsNoncurrent us-gaap:ConsolidatedEntities,us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName,us-gaap:EquityMethodInvestmentNonconsolidatedInvestee us-gaap:VariableInterestEntityNotPrimaryBeneficiary,etrn:MVPJointVenture,us-gaap:EquityMethodInvestmentNonconsolidatedInvesteeOrGroupOfInvestees█▃▁6101.1085938.1965848.298NANANA4951.521NANANANANANANANANANANA
us-gaap:PropertyPlantAndEquipmentGross ████▇▇▇▇▆▂▂▁8852.228892.0788835.6528782.428690.1868573.8628583.1248439.3618165.4356658.5456469.8466138.895NANA5516.527NANANA
us-gaap:AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment ██▇▆▅▅▅▅▄▃▂▁1090.1051076.121007.756943.687883.251823.1859.157824.931785.176651.032602.199518.718NANA405.665NANANA
us-gaap:AmortizationOfIntangibleAssets █████▇▇▇▇▅▅▅▅▅▃▁16.20516.20516.20516.20416.20514.58114.58114.5413.7510.38710.38710.38710.38710.3865.540.0NANA
us-gaap:PropertyPlantAndEquipmentNet ███████▇▇▂▂▁7762.1157815.9587827.8967838.7337806.9357750.7627723.9677614.437380.2596007.5135867.6475620.177NANA5110.862NANANA
us-gaap:InvestmentsInAffiliatesSubsidiariesAssociatesAndJointVentures ██▇▇▆▆▅▅▄▃▂▁2971.7292870.2192796.3162722.0812592.4322465.8272324.1082227.3212066.331673.3251510.2891300.43NANA460.546NANANA
us-gaap:Goodwill ▁▁▁▁▁▁▁▆█▇▇█486.698486.698486.698486.698486.698486.698486.6981070.3631347.1381239.2691239.2691384.872NANA1384.872NANANA
us-gaap:IntangibleAssetsNetExcludingGoodwill ▄▄▄▅▅▆▆▇█▁▁▁684.18700.385716.59732.795749.0765.205797.439812.02868.965565.726576.113586.5NANA617.66NANANA
us-gaap:FiniteLivedIntangibleAssetsNet NANA716.59NANANA797.439NANANA576.113NANANANANANANA
 us-gaap:FiniteLivedIntangibleAssetsNet us-gaap:BusinessAcquisition etrn:BoltonAcquisitionNANA235.293NANANA262.884NANANANANANANANANANANA
us-gaap:OperatingLeaseRightOfUseAsset NANA53.2NANANA63.665.466.448.3NANANANANANANANA
us-gaap:OtherAssetsNoncurrent ██▇▇▆▆▄▄▄▃▁▁351.043343.341336.615317.331307.012307.356243.688238.719237.008216.216164.357157.071NANA142.888NANANA
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
us-gaap:AccountsPayableCurrent ▁▁▁▃▃▃▄▆▇▅█▄61.81167.66372.098101.134111.71109.151128.114172.958181.077142.546210.007133.569NANA105.364NANANA
us-gaap:AccruedLiabilitiesCurrent ▅▄█▇█▄█▇▇▄█▁62.30744.90983.36673.18787.02351.67783.23877.00576.84746.93984.01121.149NANA20.995NANANA
us-gaap:LiabilitiesCurrent ▂▄▄▅▂▁▁▄▅▂▄█372.527574.824594.878672.31402.568293.137335.957558.31693.9393.305549.456958.252NANA606.218NANANA
us-gaap:LongTermDebtCurrent NA310.0302.5302.50.00.06.06.06.06.06.0NANANA0.0NANANA
us-gaap:OperatingLeaseLiabilityCurrent NANA10.0NANANA11.7NANANANANANANANANANANA
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
 us-gaap:LongTermDebtNoncurrent us-gaap:FairValueByMeasurementBasis,us-gaap:LongtermDebtType us-gaap:CarryingReportedAmountFairValueDisclosure,us-gaap:NotesPayableToBanksNANA6443.312NANANA5421.983NANANA4018.744NANANA987.352NANANA
 us-gaap:LongTermDebtNoncurrent us-gaap:FairValueByMeasurementBasis,us-gaap:LongtermDebtType us-gaap:EstimateOfFairValueFairValueDisclosure,us-gaap:NotesPayableToBanksNANA6894.74NANANA5410.092NANANA4008.632NANANA1006.1NANANA
 us-gaap:LongTermDebtNoncurrent us-gaap:LongtermDebtType us-gaap:NotesPayableToBanksNANA6500.0NANANA5494.0NANANA4094.0NANANA1000.0NANANA
us-gaap:DeferredIncomeTaxLiabilitiesNet █▇▆▃▁384.248371.53345.896293.583255.338NA0.0NANANANANANANANANANANA
us-gaap:MinorityInterest NANA471.165NANANA4609.364NANANA4801.84NANANA5094.995NANANA
us-gaap:OtherLiabilitiesNoncurrent ▇▇▇▇▇▇███▇▃▁98.12297.75994.90295.88997.48496.62199.18998.331103.25889.83754.50231.819NANA30.462NANANA
us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearTwo NANA10.086NANANANANANANANANANANANANANANA
us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearThree NANA7.747NANANANANANANANANANANANANANANA
us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearFour NANA5.978NANANANANANANANANANANANANANANA
us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearFive NANA4.97NANANANANANANANANANANANANANANA
us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueAfterYearFive NANA25.692NANANANANANANANANANANANANANANA
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
us-gaap:StockholdersEquity █████▁▂▃▃▃▁3169.2793207.8743210.1073172.6353084.622436.868672.7161145.0811326.2371363.165457.793NANANA1143.769NANANA
us-gaap:StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest ▃▃▃▃▃▅▆▇█▅▆▆███▁3644.8663680.4533681.2723639.6533547.6675044.3185282.085941.256245.1774677.0495259.6335475.4176408.5936466.3766238.7642640.221NANA
us-gaap:CommonStockValue █████▃▃▃▃▃▁3949.5923945.9573941.2953955.9343952.6721297.3041292.8041381.0921381.811378.673425.37NANANA0.0NANANA
us-gaap:RetainedEarningsAccumulatedDeficit ▂▂▂▂▁▁▃▆▇██-778.153-735.888-728.959-781.363-866.084-858.44-618.062-234.25-53.791-13.70433.932NANANA0.0NANANA
us-gaap:AccumulatedOtherComprehensiveIncomeLossNetOfTax ▂▁▁▄▄▃▃▆▅▅█-2.16-2.195-2.229-1.936-1.966-1.996-2.026-1.761-1.782-1.804-1.509NANANA0.0NANANA
us-gaap:MinorityInterest NANA471.165NANANA4609.364NANANA4801.84NANANA5094.995NANANA
us-gaap:MinorityInterestDecreaseFromDistributionsToNoncontrollingInterestHolders NA2.5NANA32.24496.526NA96.52695.27894.03101.11298.79491.84988.89663.625NANANA
 us-gaap:MinorityInterestDecreaseFromDistributionsToNoncontrollingInterestHolders us-gaap:StatementEquityComponents us-gaap:NoncontrollingInterestNA2.5NANA32.24496.526NA96.52695.27894.03NA98.79491.84988.896NANANANA
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
us-gaap:NetCashProvidedByUsedInOperatingActivities █▅▇▅▇▅▆▆▆▃▁▅▄▆▄382.595229.552316.691231.195343.697249.303286.018267.926300.342122.20120.317251.752154.919294.722189.231NANANA
us-gaap:NetCashProvidedByUsedInInvestingActivities ██▇▇█▇▆▆▁▆▄▅▇▇▇-141.711-70.711-211.699-172.864-148.949-196.317-457.983-486.469-1277.492-352.588-718.846-503.548-277.05-286.529-210.599NANANA
us-gaap:NetCashProvidedByUsedInFinancingActivities ▄▄▄▄▄▄▄▅▆▄▆▁█▄▄-230.158-134.953-79.499-78.149-68.364-65.344106.531346.798923.60215.264808.599-1411.5331803.24937.116-124.714NANANA
us-gaap:CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect ▅▅▅▄▅▄▄▅▄▄▅▁█▅10.72623.88825.493-19.818126.384-12.358-65.434128.255-53.548-215.123110.07-1663.3291681.11845.309NANANANA
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
us-gaap:DepreciationDepletionAndAmortization ████▇▇▇▇▆▅▅▄▄▄▃▁69.31568.61868.34266.77263.15161.34860.63459.4656.75950.51148.58643.72242.17141.34232.48322.244NANA
us-gaap:IncreaseDecreaseInAccountsPayable ▄▄▄▄▄▅▄▄▄▃▁▃▅▆█-8.211.337-11.073-4.9882.0726.067-17.932-23.462-1.08-47.827-118.125-50.8426.24852.215128.499NANANA
us-gaap:IncreaseDecreaseInOtherOperatingCapitalNet ▂▅▁▃▂▅▃▃▃▅█▄▂▄▃-26.27634.634-66.111.804-29.14137.782.152-9.279-14.83942.117126.76510.359-37.0894.202-4.116NANANA
us-gaap:NetCashProvidedByUsedInOperatingActivities █▅▇▅▇▅▆▆▆▃▁▅▄▆▄382.595229.552316.691231.195343.697249.303286.018267.926300.342122.20120.317251.752154.919294.722189.231NANANA
us-gaap:NetIncomeLoss ▆▇▇█▆▆▁▄▇▆▅▇▇▇▃▆▆▆37.11372.683117.812164.46656.49469.732-268.738-65.82574.52156.299-48.22382.825101.06782.729-127.12533.33434.36632.269
us-gaap:ProfitLoss ▆▆▇▇▇█▁▄▇█▄███▅▇▇▇40.12176.597136.587168.439143.458189.56-333.516-61.489130.48199.566-118.04185.966219.607223.744-27.861115.451115.885118.982
us-gaap:ShareBasedCompensation ▆█▆▆▄█▃▁▄▃▆▃▂▃▂3.1464.4452.9133.0481.7994.5410.886-0.7181.511.1082.8970.4850.1010.7070.017NANANA
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
us-gaap:NetCashProvidedByUsedInInvestingActivities ██▇▇█▇▆▆▁▆▄▅▇▇▇-141.711-70.711-211.699-172.864-148.949-196.317-457.983-486.469-1277.492-352.588-718.846-503.548-277.05-286.529-210.599NANANA
us-gaap:PaymentsToAcquirePropertyPlantAndEquipment ▃▃▃▄▄▅▇▁▁▇██▇▆▅69.07461.26584.439108.493116.707152.392197.4328.98.9208.966241.523241.413212.357170.589155.56NANANA
us-gaap:PaymentsToAcquireProductiveAssets ▁▁▁▂▃▃▄█▇▅▇▇▆▄▄▁72.50557.58258.344100.15119.903127.604170.519302.69278.719189.333255.808251.903221.421155.442147.4570.494NANA
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
us-gaap:NetCashProvidedByUsedInFinancingActivities ▄▄▄▄▄▄▄▅▆▄▆▁█▄▄-230.158-134.953-79.499-78.149-68.364-65.344106.531346.798923.60215.264808.599-1411.5331803.24937.116-124.714NANANA
us-gaap:ProceedsFromIssuanceOfLongTermDebt ▁█▁▁0.01900.00.00.0NANA-1400.01400.0NANA-1900.00.0NANA0.0NANANA
us-gaap:PaymentsOfDividendsCommonStock ▄▄▄▄▁████▇64.87464.87164.87164.87134.399114.254114.635114.634114.608104.251NANANANANANANANA
us-gaap:PaymentsForRepurchaseOfCommonStock NANA0.00.00.052.323NANA0.00.0NANANANANANANANA
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31

Common Stock Value

us-gaap:CommonStockValue

us-gaap:CommonStockValue


Common
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312017-12-31
Value39493945394139553952129712921381138113784250.0
Percentage of CommonStockValue100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0
Percentage of Assets30.830.931.031.331.810.610.711.011.113.44.00.0

Common Stock Shares Issued

us-gaap:CommonStockSharesIssued

us-gaap:CommonStockSharesIssued


Common
Period End2021-06-302020-12-312020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-31
Value4324320.432469229254254254254254
Percentage of CommonStockSharesIssued100.0100.0100.0100.0100.0100.0100.0100.0100.0

Preferred Stock Shares Issued

us-gaap:PreferredStockSharesIssued

us-gaap:PreferredStockSharesIssued


Preferred
Period End2020-12-312019-12-31
Value300.0
Percentage of PreferredStockSharesIssued100.00.0

Common Stock Shares Outstanding

us-gaap:CommonStockSharesOutstanding

us-gaap:CommonStockSharesOutstanding


Common
Period End2021-06-302020-12-312020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-31
Value4324320.432469229254254254254254
Percentage of CommonStockSharesOutstanding100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:CommonStockSharesOutstanding dei:LegalEntity, us-gaap:Ownership

etrn:EQTCorporationAndSubsidiaries, etrn:EquitransMidstream


Common
Period End2021-06-302020-06-302020-03-31
Value252525
Percentage of CommonStockSharesOutstanding5.85850.111.0

us-gaap:CommonStockSharesOutstanding us-gaap:StatementEquityComponents

us-gaap:CommonStock


Common
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312016-12-312015-12-31
Value4324324324324322292542542542542540.00.00.00.00.00.0
Percentage of CommonStockSharesOutstanding100.00.0100.00.0100000.0100.0100.0100.0100.0100.0100.00.00.00.00.00.00.0

Weighted Average Number Of Diluted Shares Outstanding

us-gaap:WeightedAverageNumberOfDilutedSharesOutstanding

us-gaap:WeightedAverageNumberOfDilutedSharesOutstanding


Weighted
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value433433432260248254254254254254255255255254255255255
Percentage of WeightedAverageNumberOfDilutedSharesOutstanding100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Weighted Average Number Of Shares Outstanding Basic

us-gaap:WeightedAverageNumberOfSharesOutstandingBasic

us-gaap:WeightedAverageNumberOfSharesOutstandingBasic


Weighted
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value433432432260248254254254254254254254254254254254254
Percentage of WeightedAverageNumberOfSharesOutstandingBasic100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Antidilutive Securities Excluded From Computation Of Earnings Per Share Amount

us-gaap:AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount

us-gaap:AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount


Antidilutive
Period End2021-06-302021-03-312020-09-302020-06-302019-09-302019-06-302019-03-312018-06-302018-03-31
Value3030305.0470.018540.0494580.0508760.6016220.601622
Percentage of AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount us-gaap:StatementClassOfStock

etrn:SeriesAPreferredUnits


Antidilutive
Period End2021-03-31
Value0.522
Percentage of AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount1.7

Earnings Per Share Basic

us-gaap:EarningsPerShareBasic

us-gaap:EarningsPerShareBasic


Earnings
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value0.050.130.270.350.10.28-1.05-0.260.290.22-0.190.330.40.33-0.50.130.140.13
Percentage of EarningsPerShareBasic100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Earnings Per Share Diluted

us-gaap:EarningsPerShareDiluted

us-gaap:EarningsPerShareDiluted


Earnings
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value0.050.130.280.350.10.28-1.05-0.260.290.22-0.190.320.40.32-0.50.130.130.13
Percentage of EarningsPerShareDiluted100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Comprehensive Income Net Of Tax

us-gaap:ComprehensiveIncomeNetOfTax

us-gaap:ComprehensiveIncomeNetOfTax


Comprehensive
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value22581171492769-269.003-65.8047456-49.7328210182
Percentage of ComprehensiveIncomeNetOfTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax6.515.332.042.87.915.4-63.2-16.118.414.4-12.922.727.022.3

Comprehensive Income Net Of Tax Attributable To Noncontrolling Interest

us-gaap:ComprehensiveIncomeNetOfTaxAttributableToNoncontrollingInterest

us-gaap:ComprehensiveIncomeNetOfTaxAttributableToNoncontrollingInterest


Comprehensive
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value3.0083.9144.1473.97386119-64.7784.33655143-69.817103118141
Percentage of ComprehensiveIncomeNetOfTaxAttributableToNoncontrollingInterest100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax0.91.01.11.125.526.4-15.21.113.836.8-18.128.331.638.0

Comprehensive Income Net Of Tax Including Portion Attributable To Noncontrolling Interest

us-gaap:ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest

us-gaap:ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest


Comprehensive
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value4076136168143189-333.781-61.468130199-119.549185219223
Percentage of ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax11.520.237.148.142.141.8-78.4-15.032.151.1-31.151.058.660.3

Costs And Expenses

us-gaap:CostsAndExpenses

us-gaap:CostsAndExpenses


Costs
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-30
Value21515416014916521173744623912944414613912117365
Percentage of CostsAndExpenses100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax61.840.643.742.748.546.6173.2109.459.133.3115.440.137.332.859.531.5

Gains Losses On Extinguishment Of Debt

us-gaap:GainsLossesOnExtinguishmentOfDebt

us-gaap:GainsLossesOnExtinguishmentOfDebt


Gains
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-06-302019-03-31
Value0-41025000.0000-24864000.000
Percentage of GainsLossesOnExtinguishmentOfDebt0.0100.00.00.00.0100.00.00.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax0.0-10.80.00.00.0-5.50.00.0

us-gaap:GainsLossesOnExtinguishmentOfDebt dei:LegalEntity, us-gaap:DebtInstrument, us-gaap:LongtermDebtType

etrn:EQTMidstreamPartnersLP, etrn:EQM4.75SeniorNotesDue2023, us-gaap:SeniorNotes


Gains
Period End2021-06-302021-03-31
Value0-41000000.0
Percentage of GainsLossesOnExtinguishmentOfDebt0.099.9
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax0.0-10.8
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax etrn:EQTMidstreamPartnersLP etrn:EQM4.75SeniorNotesDue2023 us-gaap:SeniorNotes0.00.0

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

us-gaap:IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest

us-gaap:IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest


Income
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-30
Value5297160196177208-328.68-59.541141232-78.292198226246116137
Percentage of IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax15.125.543.656.352.246.1-77.2-14.634.959.5-20.354.660.566.639.766.8

Income Tax Expense Benefit

us-gaap:IncomeTaxExpenseBenefit

us-gaap:IncomeTaxExpenseBenefit


Income
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-30
Value1220232834194.8361.948113239127.2592314422
Percentage of IncomeTaxExpenseBenefit100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax3.65.46.48.110.14.21.10.52.88.310.33.51.96.349.310.8

Interest Income Expense Net

us-gaap:InterestIncomeExpenseNet

us-gaap:InterestIncomeExpenseNet


Interest
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-30
Value-95642000.0-95144000.0-87420000.0-86411000.0-66795000.0-66754000.0-67927000.0-65606000.0-61713000.0-60949000.0-46606000.0-36862000.0-19884000.0-12102000.0-9931000.0-10210000.0
Percentage of InterestIncomeExpenseNet100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax-27.5-25.0-23.8-24.7-19.6-14.7-16.0-16.1-15.2-15.6-12.1-10.1-5.3-3.3-3.4-4.9

Interest Paid Net

us-gaap:InterestPaidNet

us-gaap:InterestPaidNet


Interest
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value171402795319433952998119.082201312
Percentage of InterestPaidNet100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax5.136.97.527.49.320.87.923.47.225.33.02.55.33.64.3

Net Income Loss

us-gaap:NetIncomeLoss

us-gaap:NetIncomeLoss


Net
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value37721171645669-268.738-65.8257456-48.2238210182-127.125333432
Percentage of NetIncomeLoss100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax10.719.132.147.016.615.4-63.1-16.118.314.4-12.522.727.022.3-43.516.217.516.1

Net Income Loss Attributable To Noncontrolling Interest

us-gaap:NetIncomeLossAttributableToNoncontrollingInterest

us-gaap:NetIncomeLossAttributableToNoncontrollingInterest


Net
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-30
Value3.0083.9144.1473.97386119-64.7784.33655143-69.8171031181419982
Percentage of NetIncomeLossAttributableToNoncontrollingInterest100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax0.91.01.11.125.526.4-15.21.113.836.8-18.128.331.638.034.039.8

us-gaap:NetIncomeLossAttributableToNoncontrollingInterest us-gaap:StatementClassOfStock

etrn:SeriesAPreferredUnits


Net
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-31
Value3.0083.9144.1473.9736594-90.279-44.14455143
Percentage of NetIncomeLossAttributableToNoncontrollingInterest100.0100.0100.0100.074.978.7139.4-1018.1100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax0.91.01.11.119.120.8-21.2-10.813.836.8
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax etrn:SeriesAPreferredUnits0.00.00.00.00.00.00.00.00.00.0

Net Income Loss Available To Common Stockholders Basic

us-gaap:NetIncomeLossAvailableToCommonStockholdersBasic

us-gaap:NetIncomeLossAvailableToCommonStockholdersBasic


Net
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-30
Value22581171492669-268.738-65.82574
Percentage of NetIncomeLossAvailableToCommonStockholdersBasic100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax6.515.332.142.87.915.4-63.1-16.118.3

Operating Income Loss

us-gaap:OperatingIncomeLoss

us-gaap:OperatingIncomeLoss


Operating
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value132225206200175242-311.763-38.453166260-59.446218234249118141139144
Percentage of OperatingIncomeLoss100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax38.259.456.357.351.553.4-73.2-9.440.966.7-15.459.962.767.240.568.570.772.0

us-gaap:OperatingIncomeLoss us-gaap:ConsolidationItems

us-gaap:CorporateNonSegment


Operating
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-30
Value-0.242-0.239-0.894-2.255-13.059-9.332-111.565-7.376-1.272-7.973-40.933-15.178-11.0-16.458-69.913-4.42
Percentage of OperatingIncomeLoss-0.2-0.1-0.4-1.1-7.4-3.935.819.2-0.8-3.168.9-7.0-4.7-6.6-59.0-3.1
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax-0.1-0.1-0.2-0.6-3.8-2.1-26.2-1.8-0.3-2.0-10.6-4.2-2.9-4.4-23.9-2.1
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:CorporateNonSegment0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

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

us-gaap:OperatingSegments, etrn:GasGatheringSegment


Operating
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-30
Value126139135129116155-266.57-98.48994182-87.34817716117112685
Percentage of OperatingIncomeLoss95.462.065.564.466.364.185.5256.156.670.0146.981.568.968.6106.460.8
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax36.436.836.936.934.134.3-62.6-24.123.246.7-22.748.843.246.143.141.7
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:OperatingSegments etrn:GasGatheringSegment52.955.90.055.552.550.10.0-32.933.069.50.070.467.172.00.073.7

us-gaap:OperatingSegments, etrn:GasTransmissionSegment


Operating
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-30
Value61817363597870596384665860795859
Percentage of OperatingIncomeLoss46.636.135.631.634.132.4-22.5-155.238.132.6-112.426.925.831.949.142.3
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax17.821.420.118.117.617.316.414.615.621.717.416.116.221.419.929.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:OperatingSegments etrn:GasTransmissionSegment66.773.10.068.067.373.60.068.468.277.10.065.768.074.30.066.6

us-gaap:OperatingSegments, etrn:WaterServices


Operating
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-30
Value-55.644.477-1.417101217-3.6757.722101.1862.04-3.09323154.1450.0
Percentage of OperatingIncomeLoss-41.82.0-0.75.07.07.31.2-20.16.10.5-3.4-1.410.06.13.50.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax-16.01.2-0.42.93.63.9-0.91.92.50.30.5-0.86.24.11.40.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:OperatingSegments etrn:WaterServices-360.224.20.042.140.848.70.035.736.36.60.0-13.852.857.30.00.0

Other Comprehensive Income Loss Net Of Tax

us-gaap:OtherComprehensiveIncomeLossNetOfTax

us-gaap:OtherComprehensiveIncomeLossNetOfTax


Other
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value35000.034000.0-293000.030000.030000.030000.0-265000.021000.022000.0-295000.0-1509000.0000
Percentage of OtherComprehensiveIncomeLossNetOfTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.00.00.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax0.00.0-0.10.00.00.0-0.10.00.0-0.1-0.40.00.00.0

Profit Loss

us-gaap:ProfitLoss

us-gaap:ProfitLoss


Profit
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value4076136168143189-333.516-61.489130199-118.04185219223-27.861115115118
Percentage of ProfitLoss100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax11.520.237.248.142.141.8-78.3-15.132.151.2-30.751.058.660.3-9.556.058.959.5

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

us-gaap:VariableInterestEntityNotPrimaryBeneficiary, etrn:MVPJointVenture, us-gaap:EquityMethodInvestmentNonconsolidatedInvesteeOrGroupOfInvestees


Profit
Period End2021-06-302021-03-312020-06-302020-03-31
Value120.006120117
Percentage of ProfitLoss31.80.084.262.1
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax3.70.035.526.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:VariableInterestEntityNotPrimaryBeneficiary etrn:MVPJointVenture us-gaap:EquityMethodInvestmentNonconsolidatedInvesteeOrGroupOfInvestees0.00.00.00.0

Revenue From Contract With Customer Excluding Assessed Tax

us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax

us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax


Revenue
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value348379367350340453425408406389384364374371292206196200
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

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

us-gaap:OperatingSegments, etrn:GasGatheringSegment


Revenue
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-30
Value239250248232221310312299285261265252241237178116
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax68.965.867.666.565.068.473.573.370.367.269.069.464.464.061.256.5
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax68.965.867.666.565.068.473.573.370.367.269.069.464.464.061.256.5
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:OperatingSegments etrn:GasGatheringSegment100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OperatingSegments, etrn:GasTransmissionSegment


Revenue
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-30
Value921111049388106100879210910189891069989
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax26.729.328.626.726.123.523.621.422.828.226.324.523.828.834.143.5
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax26.729.328.626.726.123.523.621.422.828.226.324.523.828.834.143.5
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:OperatingSegments etrn:GasTransmissionSegment100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OperatingSegments, etrn:WaterServices


Revenue
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-30
Value1518142430361221271817224426130.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax4.44.93.86.98.88.02.95.36.84.64.66.111.87.24.70.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax4.44.93.86.98.88.02.95.36.84.64.66.111.87.24.70.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:OperatingSegments etrn:WaterServices100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0

us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:ContractWithCustomerBasisOfPricing

us-gaap:FixedPriceContract


Revenue
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value234251254239243264243236229228207195193207
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax67.266.269.368.371.658.457.158.056.558.553.853.651.856.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax67.266.269.368.371.658.457.158.056.558.553.853.651.856.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:FixedPriceContract100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:TimeAndMaterialsContract


Revenue
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-30
Value11412811211096188176170175158315132
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax32.833.830.731.728.441.641.341.843.340.782.136.5
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax32.833.830.731.728.441.641.341.843.340.782.136.5
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:TimeAndMaterialsContract100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:ContractWithCustomerBasisOfPricing, us-gaap:StatementBusinessSegments

us-gaap:FixedPriceContract, etrn:GasGatheringSegment


Revenue
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value149148148145149152149154147128113112111109
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax42.939.040.641.643.833.635.137.936.433.129.430.929.829.6
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax42.939.040.641.643.833.635.137.936.433.129.430.929.829.6
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:FixedPriceContract etrn:GasGatheringSegment100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:FixedPriceContract, etrn:GasTransmissionSegment


Revenue
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value83101968483999381819994828297
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax24.126.726.324.224.622.022.020.120.125.524.422.721.926.4
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax24.126.726.324.224.622.022.020.120.125.524.422.721.926.4
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:FixedPriceContract etrn:GasTransmissionSegment100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:FixedPriceContract, etrn:WaterServices


Revenue
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value0.9291.8449.019.00511120.00.00.00.00.00.00.00.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax0.30.52.52.63.22.80.00.00.00.00.00.00.00.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax0.30.52.52.63.22.80.00.00.00.00.00.00.00.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:FixedPriceContract etrn:WaterServices100.0100.0100.0100.0100.0100.00.00.00.00.00.00.00.00.0

us-gaap:TimeAndMaterialsContract, etrn:GasGatheringSegment


Revenue
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-30
Value90101998772157163144137132183131
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax26.026.827.024.921.334.938.335.434.034.147.636.1
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax26.026.827.024.921.334.938.335.434.034.147.636.1
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:TimeAndMaterialsContract etrn:GasGatheringSegment100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:TimeAndMaterialsContract, etrn:GasTransmissionSegment


Revenue
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-30
Value9.101108.4078.7175.1617.0187.0765.3091010211.35
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax2.62.62.32.51.51.51.71.32.72.75.50.4
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax2.62.62.32.51.51.51.71.32.72.75.50.4
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:TimeAndMaterialsContract etrn:GasTransmissionSegment100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:TimeAndMaterialsContract, etrn:WaterServices


Revenue
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-30
Value14165.0931519235.7132026151110.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax4.24.41.44.35.65.21.35.16.63.928.90.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax4.24.41.44.35.65.21.35.16.63.928.90.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:TimeAndMaterialsContract etrn:WaterServices100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0

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

etrn:MinimumVolumeCommitmentContract, us-gaap:TimeAndMaterialsContract, etrn:GasGatheringSegment


Revenue
Period End2021-06-302021-03-31
Value0.26.2
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax0.11.6
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax0.11.6
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax etrn:MinimumVolumeCommitmentContract us-gaap:TimeAndMaterialsContract etrn:GasGatheringSegment100.0100.0

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

etrn:MinimumVolumeCommitmentContract, etrn:GasGatheringSegment


Revenue
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-31
Value3.73.2152.64.86.3
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax1.10.84.10.71.41.4
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax1.10.84.10.71.41.4
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax etrn:MinimumVolumeCommitmentContract etrn:GasGatheringSegment100.0100.0100.0100.0100.0100.0

etrn:MinimumVolumeCommitmentContract, etrn:WaterServices


Revenue
Period End2021-06-302021-03-312020-09-302020-06-302020-03-31
Value0.50.51.94.55.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax0.10.10.51.31.1
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax0.10.10.51.31.1
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax etrn:MinimumVolumeCommitmentContract etrn:WaterServices100.0100.0100.0100.0100.0

us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:StatementBusinessSegments

etrn:GasGatheringSegment


Revenue
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value239250248232221310312299285261265252241237
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax68.965.867.666.565.068.473.573.370.367.269.069.464.464.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax68.965.867.666.565.068.473.573.370.367.269.069.464.464.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax etrn:GasGatheringSegment100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

etrn:GasTransmissionSegment


Revenue
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value92111104938810610087921091018989106
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax26.729.328.626.726.123.523.621.422.828.226.324.523.828.8
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax26.729.328.626.726.123.523.621.422.828.226.324.523.828.8
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax etrn:GasTransmissionSegment100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

etrn:WaterServices


Revenue
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value1518142430361221271817224426
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax4.44.93.86.98.88.02.95.36.84.64.66.111.87.2
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax4.44.93.86.98.88.02.95.36.84.64.66.111.87.2
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax etrn:WaterServices100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Selling General And Administrative Expense

us-gaap:SellingGeneralAndAdministrativeExpense

us-gaap:SellingGeneralAndAdministrativeExpense


Selling
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-30
Value35353531322929242732412728272619
Percentage of SellingGeneralAndAdministrativeExpense100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax10.29.39.79.09.66.66.95.96.78.310.77.57.57.38.99.4

Assets

us-gaap:Assets

us-gaap:Assets


Assets
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302017-12-31
Value128061278812725126301244512189120411257512436102751052399428328
Percentage of Assets100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

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

us-gaap:VariableInterestEntityNotPrimaryBeneficiary, etrn:MVPJointVenture, us-gaap:EquityMethodInvestmentNonconsolidatedInvesteeOrGroupOfInvestees


Assetsus-gaap:
Period End2021-06-302021-03-312020-12-312019-12-31
Value6261604659945054
Percentage of Assets48.947.347.142.0
Percentage of Assets48.947.347.142.0
Percentage of Assets us-gaap:VariableInterestEntityNotPrimaryBeneficiary etrn:MVPJointVenture us-gaap:EquityMethodInvestmentNonconsolidatedInvesteeOrGroupOfInvestees100.0100.0100.0100.0

us-gaap:Assets us-gaap:ConsolidationItems

us-gaap:CorporateNonSegment


Assetsus-gaap:
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302017-12-31
Value4664614423984063123626265055541207800516
Percentage of Assets3.63.63.53.23.32.63.05.04.15.411.58.16.2
Percentage of Assets3.63.63.53.23.32.63.05.04.15.411.58.16.2
Percentage of Assets us-gaap:CorporateNonSegment100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OperatingSegments


Assetsus-gaap:
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302017-12-31
Value1233912327122831223112038118761167911949119309720931591427811
Percentage of Assets96.496.496.596.896.797.497.095.095.994.688.591.993.8
Percentage of Assets96.496.496.596.896.797.497.095.095.994.688.591.993.8
Percentage of Assets us-gaap:OperatingSegments100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

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

us-gaap:OperatingSegments, etrn:GasGatheringSegment


Assetsus-gaap:
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302017-12-31
Value7692772977397743768076337572794980316234601161315656
Percentage of Assets60.160.460.861.361.762.662.963.264.660.757.161.767.9
Percentage of Assets60.160.460.861.361.762.662.963.264.660.757.161.767.9
Percentage of Assets us-gaap:OperatingSegments etrn:GasGatheringSegment100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OperatingSegments, etrn:GasTransmissionSegment


Assetsus-gaap:
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302017-12-31
Value4508442243574279415440343903380136363243306628331947
Percentage of Assets35.234.634.233.933.433.132.430.229.231.629.128.523.4
Percentage of Assets35.234.634.233.933.433.132.430.229.231.629.128.523.4
Percentage of Assets us-gaap:OperatingSegments etrn:GasTransmissionSegment100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OperatingSegments, etrn:WaterServices


Assetsus-gaap:
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302017-12-31
Value138174185208203208202198262242237177208
Percentage of Assets1.11.41.51.71.61.71.71.62.12.42.31.82.5
Percentage of Assets1.11.41.51.71.61.71.71.62.12.42.31.82.5
Percentage of Assets us-gaap:OperatingSegments etrn:WaterServices100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Liabilities

us-gaap:Liabilities

us-gaap:Liabilities


Liabilities
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302017-12-31
Value8479842683628309822871456759663461915598526444672090
Percentage of Liabilities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets66.265.965.765.866.158.656.152.849.854.550.044.925.1

Liabilities And Stockholders Equity

us-gaap:LiabilitiesAndStockholdersEquity

us-gaap:LiabilitiesAndStockholdersEquity


Liabilities
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302017-12-31
Value128061278812725126301244512189120411257512436102751052399428328
Percentage of LiabilitiesAndStockholdersEquity100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

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

us-gaap:VariableInterestEntityNotPrimaryBeneficiary, etrn:MVPJointVenture, us-gaap:EquityMethodInvestmentNonconsolidatedInvesteeOrGroupOfInvestees


Liabilities
Period End2021-06-302021-03-312020-12-312019-12-31
Value6261604659945054
Percentage of LiabilitiesAndStockholdersEquity48.947.347.142.0
Percentage of Assets48.947.347.142.0
Percentage of Assets us-gaap:VariableInterestEntityNotPrimaryBeneficiary etrn:MVPJointVenture us-gaap:EquityMethodInvestmentNonconsolidatedInvesteeOrGroupOfInvestees100.0100.0100.0100.0

Stockholders Equity

us-gaap:StockholdersEquity

us-gaap:StockholdersEquity


Stockholders
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312017-12-31
Value316932073210317230844366721145132613634571143
Percentage of StockholdersEquity100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets24.725.125.225.124.83.65.69.110.713.34.413.7

Assets Current

us-gaap:AssetsCurrent

us-gaap:AssetsCurrent


Assets
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302017-12-31
Value550572561533503368375422333311568420354
Percentage of AssetsCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets4.34.54.44.24.03.03.13.42.73.05.44.24.3

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

us-gaap:VariableInterestEntityNotPrimaryBeneficiary, etrn:MVPJointVenture, us-gaap:EquityMethodInvestmentNonconsolidatedInvesteeOrGroupOfInvestees


Assets
Period End2021-06-302021-03-312020-12-312019-12-31
Value160108146102
Percentage of AssetsCurrent29.119.026.027.4
Percentage of Assets1.30.81.10.9
Percentage of Assets us-gaap:VariableInterestEntityNotPrimaryBeneficiary etrn:MVPJointVenture us-gaap:EquityMethodInvestmentNonconsolidatedInvesteeOrGroupOfInvestees2.61.82.42.0

Cash And Cash Equivalents At Carrying Value

us-gaap:CashAndCashEquivalentsAtCarryingValue

us-gaap:CashAndCashEquivalentsAtCarryingValue


Cash
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302017-12-312017-09-302016-12-312015-12-31
Value24223120818220275881532529294184121205966662
Percentage of CashAndCashEquivalentsAtCarryingValue100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets1.91.81.61.41.60.60.71.20.20.32.81.91.50.00.00.0

Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents

us-gaap:CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents

us-gaap:CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents


Cash
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value242231208182202758815325792941841847166121
Percentage of CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets1.91.81.61.41.60.60.71.20.20.82.81.90.00.01.5

Accounts Receivable Net Current

us-gaap:AccountsReceivableNetCurrent

us-gaap:AccountsReceivableNetCurrent


Accounts
Period End2020-12-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302017-12-31
Value2902552432822652555860
Percentage of AccountsReceivableNetCurrent100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets2.32.11.92.32.62.40.60.7

Other Assets Current

us-gaap:OtherAssetsCurrent

us-gaap:OtherAssetsCurrent


Other
Period End2020-12-312019-12-31
Value6331
Percentage of OtherAssetsCurrent100.0100.0
Percentage of Assets0.50.3

Prepaid Expense And Other Assets Current

us-gaap:PrepaidExpenseAndOtherAssetsCurrent

us-gaap:PrepaidExpenseAndOtherAssetsCurrent


Prepaid
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302017-12-31
Value53516386623931242416191014
Percentage of PrepaidExpenseAndOtherAssetsCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets0.40.40.50.70.50.30.30.20.20.20.20.10.2

Assets Noncurrent

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

us-gaap:AssetsNoncurrent

us-gaap:VariableInterestEntityNotPrimaryBeneficiary, etrn:MVPJointVenture, us-gaap:EquityMethodInvestmentNonconsolidatedInvesteeOrGroupOfInvestees


Assets
Period End2021-06-302021-03-312020-12-312019-12-31
Value6101593858484951
Percentage of AssetsNoncurrent100.0100.0100.0100.0
Percentage of Assets47.646.446.041.1
Percentage of Assets us-gaap:VariableInterestEntityNotPrimaryBeneficiary etrn:MVPJointVenture us-gaap:EquityMethodInvestmentNonconsolidatedInvesteeOrGroupOfInvestees97.498.297.698.0

Property Plant And Equipment Gross

us-gaap:PropertyPlantAndEquipmentGross

us-gaap:PropertyPlantAndEquipmentGross


Property
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302017-12-31
Value8852889288358782869085738583843981656658646961385516
Percentage of PropertyPlantAndEquipmentGross100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets69.169.569.469.569.870.371.367.165.764.861.561.766.2

Accumulated Depreciation Depletion And Amortization Property Plant And Equipment

us-gaap:AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment

us-gaap:AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment


Accumulated
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302017-12-31
Value109010761007943883823859824785651602518405
Percentage of AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets8.58.47.97.57.16.87.16.66.36.35.75.24.9

Amortization Of Intangible Assets

us-gaap:AmortizationOfIntangibleAssets

us-gaap:AmortizationOfIntangibleAssets


Amortization
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-30
Value16161616161414141310101010105.540.0
Percentage of AmortizationOfIntangibleAssets100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0
Percentage of Assets0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

Property Plant And Equipment Net

us-gaap:PropertyPlantAndEquipmentNet

us-gaap:PropertyPlantAndEquipmentNet


Property
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302017-12-31
Value7762781578277838780677507723761473806007586756205110
Percentage of PropertyPlantAndEquipmentNet100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets60.661.161.562.162.763.664.160.559.358.555.856.561.4

Investments In Affiliates Subsidiaries Associates And Joint Ventures

us-gaap:InvestmentsInAffiliatesSubsidiariesAssociatesAndJointVentures

us-gaap:InvestmentsInAffiliatesSubsidiariesAssociatesAndJointVentures


Investments
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302017-12-31
Value297128702796272225922465232422272066167315101300460
Percentage of InvestmentsInAffiliatesSubsidiariesAssociatesAndJointVentures100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets23.222.422.021.620.820.219.317.716.616.314.413.15.5

Goodwill

us-gaap:Goodwill

us-gaap:Goodwill


Goodwill
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302017-12-31
Value486486486486486486486107013471239123913841384
Percentage of Goodwill100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets3.83.83.83.93.94.04.08.510.812.111.813.916.6

us-gaap:Goodwill us-gaap:ReportingUnit

etrn:RMPPAGasGatheringReportingUnit


Goodwillus-gaap:
Period End2020-12-312019-12-312018-12-312017-12-31
Value48648610881346
Percentage of Goodwill100.0100.087.997.3
Percentage of Assets3.84.010.316.2
Percentage of Assets etrn:RMPPAGasGatheringReportingUnit0.00.00.00.0

Intangible Assets Net Excluding Goodwill

us-gaap:IntangibleAssetsNetExcludingGoodwill

us-gaap:IntangibleAssetsNetExcludingGoodwill


Intangible
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302017-12-31
Value684700716732749765797812868565576586617
Percentage of IntangibleAssetsNetExcludingGoodwill100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets5.35.55.65.86.06.36.66.57.05.55.55.97.4

Finite Lived Intangible Assets Net

us-gaap:FiniteLivedIntangibleAssetsNet

us-gaap:FiniteLivedIntangibleAssetsNet


Finite
Period End2020-12-312019-12-312018-12-31
Value716797576
Percentage of FiniteLivedIntangibleAssetsNet100.0100.0100.0
Percentage of Assets5.66.65.5

us-gaap:FiniteLivedIntangibleAssetsNet us-gaap:BusinessAcquisition

etrn:BoltonAcquisition


Finite
Period End2020-12-312019-12-31
Value235262
Percentage of FiniteLivedIntangibleAssetsNet32.833.0
Percentage of Assets1.82.2
Percentage of Assets etrn:BoltonAcquisition0.00.0

Operating Lease Right Of Use Asset

us-gaap:OperatingLeaseRightOfUseAsset

us-gaap:OperatingLeaseRightOfUseAsset


Operating
Period End2020-12-312019-12-312019-09-302019-06-302019-03-31
Value5363656648
Percentage of OperatingLeaseRightOfUseAsset100.0100.0100.0100.0100.0
Percentage of Assets0.40.50.50.50.5

Other Assets Noncurrent

us-gaap:OtherAssetsNoncurrent

us-gaap:OtherAssetsNoncurrent


Other
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302017-12-31
Value351343336317307307243238237216164157142
Percentage of OtherAssetsNoncurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets2.72.72.62.52.52.52.01.91.92.11.61.61.7

Accounts Payable Current

us-gaap:AccountsPayableCurrent

us-gaap:AccountsPayableCurrent


Accounts
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302017-12-31
Value616772101111109128172181142210133105
Percentage of AccountsPayableCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets0.50.50.60.80.90.91.11.41.51.42.01.31.3

Accrued Liabilities Current

us-gaap:AccruedLiabilitiesCurrent

us-gaap:AccruedLiabilitiesCurrent


Accrued
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302017-12-31
Value62448373875183777646842120
Percentage of AccruedLiabilitiesCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets0.50.40.70.60.70.40.70.60.60.50.80.20.3

Liabilities Current

us-gaap:LiabilitiesCurrent

us-gaap:LiabilitiesCurrent


Liabilities
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302017-12-31
Value372574594672402293335558693393549958606
Percentage of LiabilitiesCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets2.94.54.75.33.22.42.84.45.63.85.29.67.3

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

us-gaap:VariableInterestEntityNotPrimaryBeneficiary, etrn:MVPJointVenture, us-gaap:EquityMethodInvestmentNonconsolidatedInvesteeOrGroupOfInvestees


Liabilities
Period End2021-06-302021-03-312020-12-312019-12-31
Value242185217223
Percentage of LiabilitiesCurrent65.132.236.566.6
Percentage of Assets1.91.41.71.9
Percentage of Assets us-gaap:VariableInterestEntityNotPrimaryBeneficiary etrn:MVPJointVenture us-gaap:EquityMethodInvestmentNonconsolidatedInvesteeOrGroupOfInvestees3.93.13.64.4

Long Term Debt Current

us-gaap:LongTermDebtCurrent

us-gaap:LongTermDebtCurrent


Long
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312017-12-31
Value3103023020.00.06.06.06.06.06.00.0
Percentage of LongTermDebtCurrent100.0100.0100.00.00.0100.0100.0100.0100.0100.00.0
Percentage of Assets2.42.42.40.00.00.00.00.00.10.10.0

Operating Lease Liability Current

us-gaap:OperatingLeaseLiabilityCurrent

us-gaap:OperatingLeaseLiabilityCurrent


Operating
Period End2020-12-312019-12-31
Value10.011
Percentage of OperatingLeaseLiabilityCurrent100.0100.0
Percentage of Assets0.10.1

Long Term Debt Noncurrent

us-gaap:LongTermDebtNoncurrent us-gaap:FairValueByMeasurementBasis, us-gaap:LongtermDebtType

us-gaap:LongTermDebtNoncurrent

us-gaap:CarryingReportedAmountFairValueDisclosure, us-gaap:NotesPayableToBanks


Long
Period End2020-12-312019-12-312018-12-312017-12-31
Value644354214018987
Percentage of LongTermDebtNoncurrent100.0100.0100.0100.0
Percentage of Assets50.645.038.211.9
Percentage of Assets us-gaap:CarryingReportedAmountFairValueDisclosure us-gaap:NotesPayableToBanks0.00.00.00.0

us-gaap:EstimateOfFairValueFairValueDisclosure, us-gaap:NotesPayableToBanks


Long
Period End2020-12-312019-12-312018-12-312017-12-31
Value6894541040081006
Percentage of LongTermDebtNoncurrent107.099.899.7101.9
Percentage of Assets54.244.938.112.1
Percentage of Assets us-gaap:EstimateOfFairValueFairValueDisclosure us-gaap:NotesPayableToBanks0.00.00.00.0

us-gaap:LongTermDebtNoncurrent us-gaap:LongtermDebtType

us-gaap:NotesPayableToBanks


Long
Period End2020-12-312019-12-312018-12-312017-12-31
Value6500549440941000
Percentage of LongTermDebtNoncurrent100.9101.3101.9101.3
Percentage of Assets51.145.638.912.0
Percentage of Assets us-gaap:NotesPayableToBanks0.00.00.00.0

Deferred Income Tax Liabilities Net

us-gaap:DeferredIncomeTaxLiabilitiesNet

us-gaap:DeferredIncomeTaxLiabilitiesNet


Deferred
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302019-12-31
Value3843713452932550.0
Percentage of DeferredIncomeTaxLiabilitiesNet100.0100.0100.0100.0100.00.0
Percentage of Assets3.02.92.72.32.10.0

Minority Interest

us-gaap:MinorityInterest

us-gaap:MinorityInterest


Minority
Period End2020-12-312019-12-312018-12-312017-12-31
Value471460948015094
Percentage of MinorityInterest100.0100.0100.0100.0
Percentage of Assets3.738.345.661.2

Other Liabilities Noncurrent

us-gaap:OtherLiabilitiesNoncurrent

us-gaap:OtherLiabilitiesNoncurrent


Other
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302017-12-31
Value989794959796999810389543130
Percentage of OtherLiabilitiesNoncurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets0.80.80.70.80.80.80.80.80.80.90.50.30.4

Lessee Operating Lease Liability Payments Due Year Two

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearTwo

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearTwo


Lessee
Period End2020-12-31
Value10
Percentage of LesseeOperatingLeaseLiabilityPaymentsDueYearTwo100.0
Percentage of Assets0.1

Lessee Operating Lease Liability Payments Due Year Three

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearThree

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearThree


Lessee
Period End2020-12-31
Value7747000.0
Percentage of LesseeOperatingLeaseLiabilityPaymentsDueYearThree100.0
Percentage of Assets0.1

Lessee Operating Lease Liability Payments Due Year Four

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearFour

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearFour


Lessee
Period End2020-12-31
Value5978000.0
Percentage of LesseeOperatingLeaseLiabilityPaymentsDueYearFour100.0
Percentage of Assets0.0

Lessee Operating Lease Liability Payments Due Year Five

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearFive

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearFive


Lessee
Period End2020-12-31
Value4970000.0
Percentage of LesseeOperatingLeaseLiabilityPaymentsDueYearFive100.0
Percentage of Assets0.0

Lessee Operating Lease Liability Payments Due After Year Five

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueAfterYearFive

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueAfterYearFive


Lessee
Period End2020-12-31
Value25
Percentage of LesseeOperatingLeaseLiabilityPaymentsDueAfterYearFive100.0
Percentage of Assets0.2

Operating Lease Liability

us-gaap:OperatingLeaseLiability

us-gaap:OperatingLeaseLiability


Operating
Period End2020-12-312019-12-312019-09-302019-06-302019-03-31
Value5364666748
Percentage of OperatingLeaseLiability100.0100.0100.0100.0100.0
Percentage of Assets0.40.50.50.50.5

Lessee Operating Lease Liability Payments Due

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDue

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDue


Lessee
Period End2020-12-31
Value66
Percentage of LesseeOperatingLeaseLiabilityPaymentsDue100.0
Percentage of Assets0.5

Lessee Operating Lease Liability Undiscounted Excess Amount

us-gaap:LesseeOperatingLeaseLiabilityUndiscountedExcessAmount

us-gaap:LesseeOperatingLeaseLiabilityUndiscountedExcessAmount


Lessee
Period End2020-12-31
Value13
Percentage of LesseeOperatingLeaseLiabilityUndiscountedExcessAmount100.0
Percentage of Assets0.1

Stockholders Equity

us-gaap:StockholdersEquity

us-gaap:StockholdersEquity


Stockholders
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312017-12-31
Value316932073210317230844366721145132613634571143
Percentage of StockholdersEquity100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets24.725.125.225.124.83.65.69.110.713.34.413.7

Stockholders Equity Including Portion Attributable To Noncontrolling Interest

us-gaap:StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest

us-gaap:StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest


Stockholders
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302016-12-312015-12-31
Value364436803681363935475044528259416245467752595475640864666238264031922051
Percentage of StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets28.528.828.928.828.541.443.947.250.245.550.055.10.00.074.90.00.00.0

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

us-gaap:VariableInterestEntityNotPrimaryBeneficiary, etrn:MVPJointVenture, us-gaap:EquityMethodInvestmentNonconsolidatedInvesteeOrGroupOfInvestees


Stockholders
Period End2021-06-302021-03-312020-12-312019-12-31
Value6018586157774830
Percentage of StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest165.1159.3156.991.5
Percentage of Assets47.045.845.440.1
Percentage of Assets us-gaap:VariableInterestEntityNotPrimaryBeneficiary etrn:MVPJointVenture us-gaap:EquityMethodInvestmentNonconsolidatedInvesteeOrGroupOfInvestees96.196.996.495.6

us-gaap:StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest us-gaap:StatementEquityComponents

us-gaap:AccumulatedOtherComprehensiveIncome


Stockholders
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312016-12-312015-12-31
Value-2.16-2.195-2.229-1.936-1.966-1.996-2.026-1.761-1.782-1.804-1.5090.00.00.00.00.00.0
Percentage of StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest-0.1-0.1-0.1-0.1-0.1-0.0-0.0-0.0-0.0-0.0-0.00.00.00.00.00.00.0
Percentage of Assets-0.0-0.0-0.0-0.0-0.0-0.0-0.0-0.0-0.0-0.0-0.00.00.00.00.00.00.0
Percentage of Assets us-gaap:AccumulatedOtherComprehensiveIncome0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:CommonStock


Stockholders
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312016-12-312015-12-31
Value39493945394139553952129712921381138113784250.00.00.00.00.00.0
Percentage of StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest108.4107.2107.1108.7111.425.724.523.222.129.58.10.00.00.00.00.00.0
Percentage of Assets30.830.931.031.331.810.610.711.011.113.44.00.00.00.00.00.00.0
Percentage of Assets us-gaap:CommonStock0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:NoncontrollingInterest


Stockholders
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312016-12-312015-12-31
Value475472471467463460746094796491833134801521750235147509432582950
Percentage of StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest13.012.812.812.813.191.387.380.778.870.991.395.378.479.681.7102.1143.8
Percentage of Assets3.73.73.73.73.737.838.338.139.632.345.652.50.00.061.20.00.0
Percentage of Assets us-gaap:NoncontrollingInterest0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:RetainedEarnings


Stockholders
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312016-12-312015-12-31
Value-778.153-735.888-728.959-781.363-866.084-858.44-618.062-234.25-53.791-13.704330.00.00.00.00.00.0
Percentage of StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest-21.3-20.0-19.8-21.5-24.4-17.0-11.7-3.9-0.9-0.30.60.00.00.00.00.00.0
Percentage of Assets-6.1-5.8-5.7-6.2-7.0-7.0-5.1-1.9-0.4-0.10.30.00.00.00.00.00.0
Percentage of Assets us-gaap:RetainedEarnings0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

Common Stock Value

us-gaap:CommonStockValue

us-gaap:CommonStockValue


Common
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312017-12-31
Value39493945394139553952129712921381138113784250.0
Percentage of CommonStockValue100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0
Percentage of Assets30.830.931.031.331.810.610.711.011.113.44.00.0

Retained Earnings Accumulated Deficit

us-gaap:RetainedEarningsAccumulatedDeficit

us-gaap:RetainedEarningsAccumulatedDeficit


Retained
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312017-12-31
Value-778.153-735.888-728.959-781.363-866.084-858.44-618.062-234.25-53.791-13.704330.0
Percentage of RetainedEarningsAccumulatedDeficit100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0
Percentage of Assets-6.1-5.8-5.7-6.2-7.0-7.0-5.1-1.9-0.4-0.10.30.0

Accumulated Other Comprehensive Income Loss Net Of Tax

us-gaap:AccumulatedOtherComprehensiveIncomeLossNetOfTax

us-gaap:AccumulatedOtherComprehensiveIncomeLossNetOfTax


Accumulated
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312017-12-31
Value-2160000.0-2195000.0-2229000.0-1936000.0-1966000.0-1996000.0-2026000.0-1761000.0-1782000.0-1804000.0-1509000.00
Percentage of AccumulatedOtherComprehensiveIncomeLossNetOfTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0
Percentage of Assets-0.0-0.0-0.0-0.0-0.0-0.0-0.0-0.0-0.0-0.0-0.00.0

Minority Interest

us-gaap:MinorityInterest

us-gaap:MinorityInterest


Minority
Period End2020-12-312019-12-312018-12-312017-12-31
Value471460948015094
Percentage of MinorityInterest100.0100.0100.0100.0
Percentage of Assets3.738.345.661.2

Minority Interest Decrease From Distributions To Noncontrolling Interest Holders

us-gaap:MinorityInterestDecreaseFromDistributionsToNoncontrollingInterestHolders

us-gaap:MinorityInterestDecreaseFromDistributionsToNoncontrollingInterestHolders


Minority
Period End2021-03-312020-06-302020-03-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value2.5329696959410198918863
Percentage of MinorityInterestDecreaseFromDistributionsToNoncontrollingInterestHolders100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets0.00.00.00.00.00.00.00.00.00.00.0

us-gaap:MinorityInterestDecreaseFromDistributionsToNoncontrollingInterestHolders us-gaap:StatementEquityComponents

us-gaap:NoncontrollingInterest


Minority
Period End2021-03-312020-06-302020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-31
Value2.53296969594989188
Percentage of MinorityInterestDecreaseFromDistributionsToNoncontrollingInterestHolders100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets0.00.00.00.00.00.00.00.00.0
Percentage of Assets us-gaap:NoncontrollingInterest0.00.00.00.00.00.00.00.00.0

Net Cash Provided By Used In Operating Activities

us-gaap:NetCashProvidedByUsedInOperatingActivities

us-gaap:NetCashProvidedByUsedInOperatingActivities


Net
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value38222931623134324928626730012220251154294189
Percentage of NetCashProvidedByUsedInOperatingActivities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax109.860.486.366.1100.955.067.265.673.931.45.369.141.379.464.7

Net Cash Provided By Used In Investing Activities

us-gaap:NetCashProvidedByUsedInInvestingActivities

us-gaap:NetCashProvidedByUsedInInvestingActivities


Net
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value-141710000.0-70711000.0-211700000.0-172860000.0-148950000.0-196320000.0-457980000.0-486470000.0-1277500000.0-352590000.0-718850000.0-503550000.0-277050000.0-286530000.0-210600000.0
Percentage of NetCashProvidedByUsedInInvestingActivities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax-40.7-18.6-57.7-49.4-43.7-43.3-107.5-119.1-314.5-90.5-186.8-138.1-73.9-77.2-72.0

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-230.158-134.953-79.499-78.149-68.364-65.34410634692315808-1411.533180337-124.714
Percentage of NetCashProvidedByUsedInFinancingActivities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax-66.1-35.5-21.7-22.3-20.1-14.425.084.9227.43.9210.1-387.2481.310.0-42.7

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
Value102325-19.818126-12.358-65.434128-53.548-215.123110-1663.329168145
Percentage of CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax3.16.36.9-5.737.1-2.7-15.431.4-13.2-55.228.6-456.2448.712.2

Depreciation Depletion And Amortization

us-gaap:DepreciationDepletionAndAmortization

us-gaap:DepreciationDepletionAndAmortization


Depreciation
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-30
Value69686866636160595650484342413222
Percentage of DepreciationDepletionAndAmortization100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DepreciationDepletionAndAmortization us-gaap:ConsolidationItems

us-gaap:CorporateNonSegment


Depreciation
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-30
Value0.3770.0960.3770.360.2550.2340.2510.2630.2443.4463.6290.1550.0610.062-10.50.0
Percentage of DepreciationDepletionAndAmortization0.50.10.60.50.40.40.40.40.46.87.50.40.10.1-32.30.0

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

us-gaap:OperatingSegments, etrn:GasGatheringSegment


Depreciation
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-30
Value4646464441403938372826252323169.983
Percentage of DepreciationDepletionAndAmortization67.767.867.466.966.265.965.765.566.055.754.358.056.655.851.044.9

us-gaap:OperatingSegments, etrn:GasTransmissionSegment


Depreciation
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-30
Value13131313131313131212121212122212
Percentage of DepreciationDepletionAndAmortization19.920.120.120.521.522.122.222.422.224.825.728.329.530.170.555.1

us-gaap:OperatingSegments, etrn:WaterServices


Depreciation
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-30
Value8.2018.1758.168.1057.4997.1167.1146.9076.4786.4166.0935.8515.7985.7713.5150.0
Percentage of DepreciationDepletionAndAmortization11.811.911.912.111.911.611.711.611.412.712.513.413.714.010.80.0

Increase Decrease In Accounts Payable

us-gaap:IncreaseDecreaseInAccountsPayable

us-gaap:IncreaseDecreaseInAccountsPayable


Increase
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value-8.211.337-11.073-4.9882.0726.067-17.932-23.462-1.08-47.827-118.125-50.842652128
Percentage of IncreaseDecreaseInAccountsPayable100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Increase Decrease In Other Operating Capital Net

us-gaap:IncreaseDecreaseInOtherOperatingCapitalNet

us-gaap:IncreaseDecreaseInOtherOperatingCapitalNet


Increase
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value-26.27634-66.111.804-29.141372.152-9.279-14.8394212610-37.0894.202-4.116
Percentage of IncreaseDecreaseInOtherOperatingCapitalNet100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Net Cash Provided By Used In Operating Activities

us-gaap:NetCashProvidedByUsedInOperatingActivities

us-gaap:NetCashProvidedByUsedInOperatingActivities


Net
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value38222931623134324928626730012220251154294189
Percentage of NetCashProvidedByUsedInOperatingActivities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax109.860.486.366.1100.955.067.265.673.931.45.369.141.379.464.7

Net Income Loss

us-gaap:NetIncomeLoss

us-gaap:NetIncomeLoss


Net
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value37721171645669-268.738-65.8257456-48.2238210182-127.125333432
Percentage of NetIncomeLoss100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax10.719.132.147.016.615.4-63.1-16.118.314.4-12.522.727.022.3-43.516.217.516.1

Profit Loss

us-gaap:ProfitLoss

us-gaap:ProfitLoss


Profit
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value4076136168143189-333.516-61.489130199-118.04185219223-27.861115115118
Percentage of ProfitLoss100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax11.520.237.248.142.141.8-78.3-15.132.151.2-30.751.058.660.3-9.556.058.959.5

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

us-gaap:VariableInterestEntityNotPrimaryBeneficiary, etrn:MVPJointVenture, us-gaap:EquityMethodInvestmentNonconsolidatedInvesteeOrGroupOfInvestees


Profit
Period End2021-06-302021-03-312020-06-302020-03-31
Value120.006120117
Percentage of ProfitLoss31.80.084.262.1
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax3.70.035.526.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:VariableInterestEntityNotPrimaryBeneficiary etrn:MVPJointVenture us-gaap:EquityMethodInvestmentNonconsolidatedInvesteeOrGroupOfInvestees0.00.00.00.0

Share Based Compensation

us-gaap:ShareBasedCompensation

us-gaap:ShareBasedCompensation


Share
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value3.1464.4452.9133.0481.7994.5410.886-0.7181.511.1082.8970.4850.1010.7070.017
Percentage of ShareBasedCompensation100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Net Cash Provided By Used In Investing Activities

us-gaap:NetCashProvidedByUsedInInvestingActivities

us-gaap:NetCashProvidedByUsedInInvestingActivities


Net
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value-141710000.0-70711000.0-211700000.0-172860000.0-148950000.0-196320000.0-457980000.0-486470000.0-1277500000.0-352590000.0-718850000.0-503550000.0-277050000.0-286530000.0-210600000.0
Percentage of NetCashProvidedByUsedInInvestingActivities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax-40.7-18.6-57.7-49.4-43.7-43.3-107.5-119.1-314.5-90.5-186.8-138.1-73.9-77.2-72.0

Payments To Acquire Property Plant And Equipment

us-gaap:PaymentsToAcquirePropertyPlantAndEquipment

us-gaap:PaymentsToAcquirePropertyPlantAndEquipment


Payments
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value6961841081161521978.98.9208241241212170155
Percentage of PaymentsToAcquirePropertyPlantAndEquipment100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Payments To Acquire Productive Assets

us-gaap:PaymentsToAcquireProductiveAssets

us-gaap:PaymentsToAcquireProductiveAssets


Payments
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-30
Value72575810011912717030227818925525122115514770
Percentage of PaymentsToAcquireProductiveAssets100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:PaymentsToAcquireProductiveAssets us-gaap:ConsolidationItems

us-gaap:CorporateNonSegment


Payments
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-30
Value0.2151.1570.770.4470.9111.8762.9921.0682.3233.39617110.00.00.00.0
Percentage of PaymentsToAcquireProductiveAssets0.32.01.30.40.81.51.80.40.81.86.84.70.00.00.00.0

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

us-gaap:OperatingSegments, etrn:EurekaMidstreamHoldingsLLC, etrn:GasGatheringSegment


Payments
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-30
Value4.11.74.51311128.36.710
Percentage of PaymentsToAcquireProductiveAssets5.73.07.713.59.39.84.92.23.9

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

us-gaap:OperatingSegments, etrn:MVPSouthgateProject, etrn:GasTransmissionSegment


Payments
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-30
Value731012865334526121115614446726365
Percentage of PaymentsToAcquireProductiveAssets101.918.6220.265.527.935.4153.569.956.176.5182.6104.529.7

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

us-gaap:OperatingSegments, etrn:GasGatheringSegment


Payments
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-30
Value5948419010111114827125615820219418613410348
Percentage of PaymentsToAcquireProductiveAssets82.383.671.790.384.487.387.189.892.083.579.077.284.286.370.468.3

us-gaap:OperatingSegments, etrn:GasTransmissionSegment


Payments
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-30
Value7.793.505126.721151013161118293727183722
Percentage of PaymentsToAcquireProductiveAssets10.76.121.06.712.98.57.65.44.09.911.714.912.612.225.431.7

us-gaap:OperatingSegments, etrn:WaterServices


Payments
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-30
Value4.824.8073.5282.532.3713.4765.967138.8499.1756.1797.9817.0022.3756.2330.0
Percentage of PaymentsToAcquireProductiveAssets6.68.36.02.52.02.73.54.43.24.82.43.23.21.54.20.0

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-230.158-134.953-79.499-78.149-68.364-65.34410634692315808-1411.533180337-124.714
Percentage of NetCashProvidedByUsedInFinancingActivities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax-66.1-35.5-21.7-22.3-20.1-14.425.084.9227.43.9210.1-387.2481.310.0-42.7

Proceeds From Issuance Of Long Term Debt

us-gaap:ProceedsFromIssuanceOfLongTermDebt

us-gaap:ProceedsFromIssuanceOfLongTermDebt


Proceeds
Period End2021-06-302021-03-312020-12-312020-09-302019-12-312019-09-302018-12-312018-09-302017-12-31
Value0.019000.00.0-1400.01400-1900.00.00.0
Percentage of ProceedsFromIssuanceOfLongTermDebt0.0100.00.00.0100.0100.0100.00.00.0

Payments Of Dividends Common Stock

us-gaap:PaymentsOfDividendsCommonStock

us-gaap:PaymentsOfDividendsCommonStock


Payments
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-31
Value6464646434114114114114104
Percentage of PaymentsOfDividendsCommonStock100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Payments For Repurchase Of Common Stock

us-gaap:PaymentsForRepurchaseOfCommonStock

us-gaap:PaymentsForRepurchaseOfCommonStock


Payments
Period End2020-12-312020-09-302020-06-302020-03-312019-06-302019-03-31
Value0.00.00.0520.00.0
Percentage of PaymentsForRepurchaseOfCommonStock0.00.00.0100.00.00.0

Effective Income Tax Rate Continuing Operations

us-gaap:EffectiveIncomeTaxRateContinuingOperations

us-gaap:EffectiveIncomeTaxRateContinuingOperations


Effective
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-30
Value23.821.00.214.40.1930.092-3.703-0.0330.0810.140.0750.0650.0320.0940.2340.162
Percentage of EffectiveIncomeTaxRateContinuingOperations100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

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

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice


Share
Period End2020-12-31
Value38.55
Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice100.0

etrn:BusinessCombinationProvisionalInformationInitialAccountingIncompleteAdjustmentAssets us-gaap:BusinessAcquisition

etrn:BusinessCombinationProvisionalInformationInitialAccountingIncompleteAdjustmentAssets

etrn:BoltonAcquisition


Business
Period End2020-12-31
Value0
Percentage of BusinessCombinationProvisionalInformationInitialAccountingIncompleteAdjustmentAssets0.0

etrn:BusinessCombinationProvisionalInformationInitialAccountingIncompleteAdjustmentCurrentLiabilities us-gaap:BusinessAcquisition

etrn:BusinessCombinationProvisionalInformationInitialAccountingIncompleteAdjustmentCurrentLiabilities

etrn:BoltonAcquisition


Business
Period End2020-12-31
Value0
Percentage of BusinessCombinationProvisionalInformationInitialAccountingIncompleteAdjustmentCurrentLiabilities0.0

etrn:BusinessCombinationProvisionalInformationInitialAccountingIncompleteAdjustmentDeferredTaxAssets us-gaap:BusinessAcquisition

etrn:BusinessCombinationProvisionalInformationInitialAccountingIncompleteAdjustmentDeferredTaxAssets

etrn:BoltonAcquisition


Business
Period End2020-12-31
Value0
Percentage of BusinessCombinationProvisionalInformationInitialAccountingIncompleteAdjustmentDeferredTaxAssets0.0

etrn:BusinessCombinationProvisionalInformationInitialAccountingIncompleteAdjustmentLiabilities us-gaap:BusinessAcquisition

etrn:BusinessCombinationProvisionalInformationInitialAccountingIncompleteAdjustmentLiabilities

etrn:BoltonAcquisition


Business
Period End2020-12-31
Value0
Percentage of BusinessCombinationProvisionalInformationInitialAccountingIncompleteAdjustmentLiabilities0.0

etrn:BusinessCombinationProvisionalInformationInitialAccountingIncompleteAdjustmentNoncontrollingInterest us-gaap:BusinessAcquisition

etrn:BusinessCombinationProvisionalInformationInitialAccountingIncompleteAdjustmentNoncontrollingInterest

etrn:BoltonAcquisition


Business
Period End2020-12-31
Value0
Percentage of BusinessCombinationProvisionalInformationInitialAccountingIncompleteAdjustmentNoncontrollingInterest0.0

etrn:ComprehensiveIncomeLossNetOfTaxAttributableToPreferredShareholders

etrn:ComprehensiveIncomeLossNetOfTaxAttributableToPreferredShareholders


Comprehensive
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302019-06-30
Value14141414290.0
Percentage of ComprehensiveIncomeLossNetOfTaxAttributableToPreferredShareholders100.0100.0100.0100.0100.00.0

etrn:ContractwithCustomerLiabilityAmountRecordedDuringPeriod

etrn:ContractwithCustomerLiabilityAmountRecordedDuringPeriod


Contractwith
Period End2021-03-312020-12-312020-03-31
Value7276173
Percentage of ContractwithCustomerLiabilityAmountRecordedDuringPeriod100.0100.0100.0

etrn:ContributionsDistributionsMadeToLimitedPartnerCashDistributionsReceivedPaidIncludingNoncontrollingInterest

etrn:ContributionsDistributionsMadeToLimitedPartnerCashDistributionsReceivedPaidIncludingNoncontrollingInterest


Contributions
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312017-12-31
Value00-32244000.0-96526000.0-96526000.0-96526000.0-95278000.0-94030000.0-101110000.0-63625000.0
Percentage of ContributionsDistributionsMadeToLimitedPartnerCashDistributionsReceivedPaidIncludingNoncontrollingInterest0.00.0100.0100.0100.0100.0100.0100.0100.0100.0

etrn:DebtInstrumentDebtDefaultHoldersOfOutstandingPrincipalPercentage us-gaap:DebtInstrument, us-gaap:LongtermDebtType

etrn:DebtInstrumentDebtDefaultHoldersOfOutstandingPrincipalPercentage

etrn:A2021SeniorNotes, us-gaap:SeniorNotes


Debt
Period End2021-03-31
Value25.0
Percentage of DebtInstrumentDebtDefaultHoldersOfOutstandingPrincipalPercentage100.0

etrn:DebtInstrumentDebtDefaultHoldersOfOutstandingPrincipalPercentage us-gaap:DebtInstrument, us-gaap:LongtermDebtType, us-gaap:SubsequentEventType

etrn:A2021SeniorNotes, us-gaap:SeniorNotes, us-gaap:SubsequentEvent


Debt
Period End2021-01-08
Value25.0
Percentage of DebtInstrumentDebtDefaultHoldersOfOutstandingPrincipalPercentage0.0

etrn:DeferredTaxLiabilityIncreaseInInvestmentsInPartnerships

etrn:DeferredTaxLiabilityIncreaseInInvestmentsInPartnerships


Deferred
Period End2020-09-30
Value257
Percentage of DeferredTaxLiabilityIncreaseInInvestmentsInPartnerships100.0

etrn:EquityMethodInvestmentCapitalCallNotice us-gaap:ConsolidatedEntities, us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName

etrn:EquityMethodInvestmentCapitalCallNotice

us-gaap:VariableInterestEntityNotPrimaryBeneficiary, etrn:MVPJointVenture


Equity
Period End2020-12-31
Value9.1
Percentage of EquityMethodInvestmentCapitalCallNotice100.0

us-gaap:VariableInterestEntityNotPrimaryBeneficiary, etrn:MVPProject


Equity
Period End2021-05-312021-03-31
Value9372
Percentage of EquityMethodInvestmentCapitalCallNotice0.00.0

etrn:EquityMethodInvestmentCapitalCallNotice us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName, us-gaap:VariableInterestEntitiesByClassificationOfEntity

etrn:MVPProject, us-gaap:VariableInterestEntityNotPrimaryBeneficiary


Equity
Period End2020-09-302019-09-302019-05-312019-03-31
Value126254352149
Percentage of EquityMethodInvestmentCapitalCallNotice0.00.00.00.0

etrn:EquityMethodInvestmentFairValueAssumptionDiscountRate

etrn:EquityMethodInvestmentFairValueAssumptionDiscountRate


Equity
Period End2020-12-31
Value5.5
Percentage of EquityMethodInvestmentFairValueAssumptionDiscountRate100.0

etrn:EquityMethodInvestmentOwnershipPercentageThresholdforBusinessDecisions us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName, us-gaap:RelatedPartyTransactionsByRelatedParty

etrn:EquityMethodInvestmentOwnershipPercentageThresholdforBusinessDecisions

etrn:MVPJointVenture, us-gaap:BeneficialOwner


Equity
Period End2021-03-312020-12-31
Value66.670
Percentage of EquityMethodInvestmentOwnershipPercentageThresholdforBusinessDecisions100.00.0

etrn:EquityMethodInvestmentSummarizedFinancialInformationAllowanceForFundsUsedDuringConstructionCapitalizedCostOfEquity us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName

etrn:EquityMethodInvestmentSummarizedFinancialInformationAllowanceForFundsUsedDuringConstructionCapitalizedCostOfEquity

etrn:MVPJointVenture


Equity
Period End2021-06-302020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-30
Value9.042918482-65.034675547-8.12231613-9.03610
Percentage of EquityMethodInvestmentSummarizedFinancialInformationAllowanceForFundsUsedDuringConstructionCapitalizedCostOfEquity100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

etrn:EquityMethodInvestmentSummarizedFinancialInformationEnvironmentalRemediationReserve us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName

etrn:EquityMethodInvestmentSummarizedFinancialInformationEnvironmentalRemediationReserve

etrn:MVPJointVenture


Equity
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value20000.0-50000.0-265000.0266000.0-516000.026000.0-2192000.00000
Percentage of EquityMethodInvestmentSummarizedFinancialInformationEnvironmentalRemediationReserve100.0100.0100.0100.0100.0100.0100.00.00.00.00.0

etrn:EquityMethodInvestmentSummarizedFinancialInformationInterestIncome us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName

etrn:EquityMethodInvestmentSummarizedFinancialInformationInterestIncome

etrn:MVPJointVenture


Equity
Period End2021-06-302020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-30
Value3.87539363517229232065116.9895.649233.227
Percentage of EquityMethodInvestmentSummarizedFinancialInformationInterestIncome100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

etrn:EquityMethodInvestmentSummarizedFinancialInformationOperatingExpenses us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName

etrn:EquityMethodInvestmentSummarizedFinancialInformationOperatingExpenses

etrn:MVPJointVenture


Equity
Period End2021-06-302020-06-30
Value-150000.0-50000.0
Percentage of EquityMethodInvestmentSummarizedFinancialInformationOperatingExpenses100.0100.0

etrn:EquityMethodInvestmentSummarizedFinancialInformationOtherIncome us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName

etrn:EquityMethodInvestmentSummarizedFinancialInformationOtherIncome

etrn:MVPJointVenture


Equity
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value4000.06000.013000.031000.0231000.0380000.01165000.01785000.02913000.02562000.01923000.0743000.0534000.0
Percentage of EquityMethodInvestmentSummarizedFinancialInformationOtherIncome100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

etrn:LineOfCreditFacilityAverageDailyAmountOutstanding dei:LegalEntity, us-gaap:DebtInstrument, us-gaap:LongtermDebtType

etrn:LineOfCreditFacilityAverageDailyAmountOutstanding

etrn:EQMMidstreamPartnersLP, etrn:EQMCreditFacility, us-gaap:LineOfCredit


Line
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-30
Value47548948514191027-104.086510439428322
Percentage of LineOfCreditFacilityAverageDailyAmountOutstanding100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

etrn:EurekaMidstreamLLC, etrn:EurekaCreditFacility, us-gaap:LineOfCredit


Line
Period End2021-05-132021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-30
Value3103051.03102982933.0293277
Percentage of LineOfCreditFacilityAverageDailyAmountOutstanding0.062.40.063.921.028.5-2.933.926.6

etrn:NetIncomeLossIncludingPortionAttributableToNoncontrollingInterestExcludingTemporaryEquity

etrn:NetIncomeLossIncludingPortionAttributableToNoncontrollingInterestExcludingTemporaryEquity


Net
Period End2021-06-302021-03-312020-09-302020-06-30
Value2561153141
Percentage of NetIncomeLossIncludingPortionAttributableToNoncontrollingInterestExcludingTemporaryEquity100.0100.0100.0100.0

etrn:NetIncomeLossIncludingPortionAttributableToNoncontrollingInterestExcludingTemporaryEquity us-gaap:StatementEquityComponents

us-gaap:NoncontrollingInterest


Net
Period End2021-06-302021-03-312020-09-302020-06-30
Value3.0083.9143.97386
Percentage of NetIncomeLossIncludingPortionAttributableToNoncontrollingInterestExcludingTemporaryEquity11.86.32.661.6

us-gaap:RetainedEarnings


Net
Period End2021-06-302021-03-312020-09-302020-06-30
Value225814954
Percentage of NetIncomeLossIncludingPortionAttributableToNoncontrollingInterestExcludingTemporaryEquity88.293.797.438.4

etrn:OtherComprehensiveIncomeLossIncludingReclassificationFromAOCIToRetainedEarningsAfterTax

etrn:OtherComprehensiveIncomeLossIncludingReclassificationFromAOCIToRetainedEarningsAfterTax


Other
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-31
Value-35000.0-34000.0-30000.0-30000.0-30000.0-21000.0-22000.0-21000.0
Percentage of OtherComprehensiveIncomeLossIncludingReclassificationFromAOCIToRetainedEarningsAfterTax100.0100.0100.0100.0100.0100.0100.0100.0

etrn:OtherComprehensiveIncomeLossIncludingReclassificationFromAOCIToRetainedEarningsAfterTax us-gaap:StatementEquityComponents

us-gaap:AccumulatedOtherComprehensiveIncome


Other
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-31
Value-35000.0-34000.0-30000.0-30000.0-30000.0-21000.0-22000.0295000.0
Percentage of OtherComprehensiveIncomeLossIncludingReclassificationFromAOCIToRetainedEarningsAfterTax100.0100.0100.0100.0100.0100.0100.0-1404.8

etrn:PartnersCapitalAccountCumulativeDistributions us-gaap:BusinessAcquisition, us-gaap:CapitalUnitsByClass

etrn:PartnersCapitalAccountCumulativeDistributions

etrn:EQMMerger, etrn:SeriesAPreferredUnits


Partners
Period End2020-08-13
Value10
Percentage of PartnersCapitalAccountCumulativeDistributions100.0

etrn:PaymentOfDebtCommitmentFees dei:LegalEntity, us-gaap:DebtInstrument, us-gaap:LongtermDebtType

etrn:PaymentOfDebtCommitmentFees

etrn:EurekaMidstreamLLC, etrn:EurekaCreditFacility, us-gaap:LineOfCredit


Payment
Period End2021-05-132021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-30
Value100000.0100000.0200000.0100000.0100000.0200000.0200000.0100000.0100000.0
Percentage of PaymentOfDebtCommitmentFees100.0100.0100.0100.0100.0100.0100.0100.0100.0

etrn:PaymentstoAcquireBusinessesNetOfEquityInterestsAcquired us-gaap:BusinessAcquisition

etrn:PaymentstoAcquireBusinessesNetOfEquityInterestsAcquired

etrn:BoltonAcquisition


Paymentsto
Period End2020-09-302020-06-302020-03-312019-09-302019-04-10
Value849849849849861
Percentage of PaymentstoAcquireBusinessesNetOfEquityInterestsAcquired100.0100.0100.0100.0100.0

etrn:RevenueRecognizedInExcessOfAmountsReceived

etrn:RevenueRecognizedInExcessOfAmountsReceived


Revenue
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-31
Value4.436103.364.439.35111
Percentage of RevenueRecognizedInExcessOfAmountsReceived100.0100.0100.0100.0100.0100.0

etrn:RevenueRecognizedInExcessOfAmountsReceived us-gaap:ProductOrService

etrn:MinimumVolumeCommitmentContract


Revenue
Period End2021-03-31
Value6.2
Percentage of RevenueRecognizedInExcessOfAmountsReceived60.9

etrn:ShareBasedCompensationArrangementByShareBasedPaymentTargetAwardPayoutPercentage us-gaap:AwardType, us-gaap:PlanName, us-gaap:SubsequentEventType

etrn:ShareBasedCompensationArrangementByShareBasedPaymentTargetAwardPayoutPercentage

us-gaap:PerformanceShares, etrn:A2021PerformanceShareUnitAwards, us-gaap:SubsequentEvent


Share
Period End2021-02-28
Value100.0
Percentage of ShareBasedCompensationArrangementByShareBasedPaymentTargetAwardPayoutPercentage100.0

etrn:ShareBasedPaymentArrangementAccruedAndAssumedCapitalExpensesAmount

etrn:ShareBasedPaymentArrangementAccruedAndAssumedCapitalExpensesAmount


Share
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-09-302019-06-30
Value3.4-3.7-8.3-3.2-24.815-5.1
Percentage of ShareBasedPaymentArrangementAccruedAndAssumedCapitalExpensesAmount100.0100.0100.0100.0100.0100.0100.0

etrn:TemporaryEquityDistributions

etrn:TemporaryEquityDistributions


Temporary
Period End2021-06-302021-03-312020-09-30
Value14142.251
Percentage of TemporaryEquityDistributions100.0100.0100.0

us-gaap:BusinessCombinationAcquisitionRelatedCosts

us-gaap:BusinessCombinationAcquisitionRelatedCosts


Business
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-30
Value0.00.98411111.4740.256158.78237161515793.876
Percentage of BusinessCombinationAcquisitionRelatedCosts0.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:BusinessCombinationProvisionalInformationInitialAccountingIncompleteAdjustmentConsiderationTransferred us-gaap:BusinessAcquisition

us-gaap:BusinessCombinationProvisionalInformationInitialAccountingIncompleteAdjustmentConsiderationTransferred

etrn:BoltonAcquisition


Business
Period End2020-12-312020-09-302020-06-302020-03-312019-12-31
Value00-11404000.000
Percentage of BusinessCombinationProvisionalInformationInitialAccountingIncompleteAdjustmentConsiderationTransferred0.00.0100.00.00.0

us-gaap:BusinessCombinationProvisionalInformationInitialAccountingIncompleteAdjustmentIntangibles us-gaap:BusinessAcquisition

us-gaap:BusinessCombinationProvisionalInformationInitialAccountingIncompleteAdjustmentIntangibles

etrn:BoltonAcquisition


Business
Period End2020-12-312020-09-302020-06-302020-03-312019-12-31
Value00-6000000.000
Percentage of BusinessCombinationProvisionalInformationInitialAccountingIncompleteAdjustmentIntangibles0.00.0100.00.00.0

us-gaap:BusinessCombinationProvisionalInformationInitialAccountingIncompleteAdjustmentInventory us-gaap:BusinessAcquisition

us-gaap:BusinessCombinationProvisionalInformationInitialAccountingIncompleteAdjustmentInventory

etrn:BoltonAcquisition


Business
Period End2020-12-31
Value0
Percentage of BusinessCombinationProvisionalInformationInitialAccountingIncompleteAdjustmentInventory0.0

us-gaap:BusinessCombinationProvisionalInformationInitialAccountingIncompleteAdjustmentPropertyPlantAndEquipment us-gaap:BusinessAcquisition

us-gaap:BusinessCombinationProvisionalInformationInitialAccountingIncompleteAdjustmentPropertyPlantAndEquipment

etrn:BoltonAcquisition


Business
Period End2020-12-31
Value0
Percentage of BusinessCombinationProvisionalInformationInitialAccountingIncompleteAdjustmentPropertyPlantAndEquipment0.0

us-gaap:CommonStockDividendsPerShareDeclared

us-gaap:CommonStockDividendsPerShareDeclared


Common
Period End2021-06-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value0.150.150.150.450.450.450.450.41000
Percentage of CommonStockDividendsPerShareDeclared100.0100.0100.0100.0100.0100.0100.0100.00.00.00.0

us-gaap:ContractWithCustomerAssetReclassifiedToReceivable

us-gaap:ContractWithCustomerAssetReclassifiedToReceivable


Contract
Period End2021-06-302021-03-31
Value0.016
Percentage of ContractWithCustomerAssetReclassifiedToReceivable0.0100.0

us-gaap:DebtInstrumentRedemptionPricePercentage us-gaap:DebtInstrument, us-gaap:LongtermDebtType

us-gaap:DebtInstrumentRedemptionPricePercentage

etrn:A2021SeniorNotes, us-gaap:SeniorNotes


Debt
Period End2021-03-31
Value101.0
Percentage of DebtInstrumentRedemptionPricePercentage100.0

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

etrn:A2021SeniorNotes, us-gaap:SeniorNotes, us-gaap:SubsequentEvent


Debt
Period End2021-01-08
Value101.0
Percentage of DebtInstrumentRedemptionPricePercentage0.0

us-gaap:DebtRelatedCommitmentFeesAndDebtIssuanceCosts dei:LegalEntity, us-gaap:DebtInstrument, us-gaap:LongtermDebtType

us-gaap:DebtRelatedCommitmentFeesAndDebtIssuanceCosts

etrn:EQMMidstreamPartnersLP, etrn:EQMCreditFacility, us-gaap:LineOfCredit


Debt
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-31
Value1600000.02300000.02200000.02400000.01400000.01200000.01300000.01200000.01100000.01000000.0
Percentage of DebtRelatedCommitmentFeesAndDebtIssuanceCosts100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DeferredIncomeTaxesAndTaxCredits

us-gaap:DeferredIncomeTaxesAndTaxCredits


Deferred
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-31
Value1220232733184.8361.9481132
Percentage of DeferredIncomeTaxesAndTaxCredits100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DerivativeGainLossOnDerivativeNet

us-gaap:DerivativeGainLossOnDerivativeNet


Derivative
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-31
Value9.47.1-21.221124.2
Percentage of DerivativeGainLossOnDerivativeNet100.0100.0100.0100.0100.0100.0

us-gaap:DividendsCommonStock

us-gaap:DividendsCommonStock


Dividends
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-31
Value64646534115114114104
Percentage of DividendsCommonStock100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DividendsCommonStock us-gaap:StatementEquityComponents

us-gaap:RetainedEarnings


Dividends
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-31
Value64646534115114114104
Percentage of DividendsCommonStock100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:EquityMethodInvestmentSummarizedFinancialInformationNetIncomeLoss us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName

us-gaap:EquityMethodInvestmentSummarizedFinancialInformationNetIncomeLoss

etrn:MVPJointVenture


Equity
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-30
Value130120117108978068573524191413
Percentage of EquityMethodInvestmentSummarizedFinancialInformationNetIncomeLoss100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:GoodwillImpairmentLoss us-gaap:BusinessAcquisition

us-gaap:GoodwillImpairmentLoss

etrn:BoltonAcquisition


Goodwill
Period End2020-12-312020-09-302020-06-302019-09-30
Value0.00.09999
Percentage of GoodwillImpairmentLoss0.00.0100.0100.0

us-gaap:GoodwillPurchaseAccountingAdjustments us-gaap:BusinessAcquisition

us-gaap:GoodwillPurchaseAccountingAdjustments

etrn:BoltonAcquisition


Goodwill
Period End2020-12-31
Value0.0
Percentage of GoodwillPurchaseAccountingAdjustments0.0

us-gaap:ImpairmentOfIntangibleAssetsFinitelived us-gaap:StatementBusinessSegments

us-gaap:ImpairmentOfIntangibleAssetsFinitelived

etrn:GasGatheringSegment


Impairment
Period End2020-12-312020-03-31
Value0.017
Percentage of ImpairmentOfIntangibleAssetsFinitelived0.0100.0

us-gaap:ImpairmentOfLongLivedAssetsHeldForUse

us-gaap:ImpairmentOfLongLivedAssetsHeldForUse


Impairment
Period End2021-06-302020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-30
Value560.00.00.055583305800.00.00.00.0
Percentage of ImpairmentOfLongLivedAssetsHeldForUse100.00.00.00.0100.0100.0100.0100.00.00.00.00.0

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

us-gaap:OperatingSegments, etrn:GasGatheringSegment


Impairment
Period End2020-09-302020-06-302020-03-312019-09-30
Value0.00.055298
Percentage of ImpairmentOfLongLivedAssetsHeldForUse0.00.0100.097.8

us-gaap:OperatingSegments, etrn:WaterServices


Impairment
Period End2021-06-30
Value56
Percentage of ImpairmentOfLongLivedAssetsHeldForUse100.0

us-gaap:ImpairmentOfLongLivedAssetsHeldForUse us-gaap:StatementBusinessSegments

etrn:WaterServices


Impairment
Period End2021-06-30
Value56
Percentage of ImpairmentOfLongLivedAssetsHeldForUse100.0

us-gaap:ImpairmentOfOilAndGasProperties us-gaap:StatementBusinessSegments

us-gaap:ImpairmentOfOilAndGasProperties

etrn:GasGatheringSegment


Impairment
Period End2020-12-312020-03-31
Value0.037
Percentage of ImpairmentOfOilAndGasProperties0.0100.0

us-gaap:IncomeLossFromEquityMethodInvestments

us-gaap:IncomeLossFromEquityMethodInvestments


Income
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-30
Value5.9210.00362605654504436312516108.8116.7586.025
Percentage of IncomeLossFromEquityMethodInvestments100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:IncreaseDecreaseInContractWithCustomerLiability

us-gaap:IncreaseDecreaseInContractWithCustomerLiability


Increase
Period End2020-12-312020-09-302020-06-302020-03-312019-06-302019-03-31
Value0.00.0-6.8311280.00.0
Percentage of IncreaseDecreaseInContractWithCustomerLiability0.00.0100.0100.00.00.0

us-gaap:IncreaseDecreaseInContractWithCustomerLiability dei:LegalEntity

etrn:EQTCorporationAndSubsidiaries


Increase
Period End2020-12-312020-09-30
Value22574
Percentage of IncreaseDecreaseInContractWithCustomerLiability0.00.0

us-gaap:IncreaseDecreaseInDeferredRevenue

us-gaap:IncreaseDecreaseInDeferredRevenue


Increase
Period End2021-06-302021-03-312020-12-312020-09-30
Value74727674
Percentage of IncreaseDecreaseInDeferredRevenue100.0100.0100.0100.0

us-gaap:IncreaseDecreaseInInterestPayableNet

us-gaap:IncreaseDecreaseInInterestPayableNet


Increase
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-31
Value75-46.934-11.44934-28.793-32.49532-38.828321.7220.498
Percentage of IncreaseDecreaseInInterestPayableNet100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:IncreaseDecreaseInReceivables

us-gaap:IncreaseDecreaseInReceivables


Increase
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value-33.132-17.72525-15.1580.99811-40.8672.1059.98938-28.6425.6582023
Percentage of IncreaseDecreaseInReceivables100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:IncrementalCommonSharesAttributableToShareBasedPaymentArrangements us-gaap:AwardType

us-gaap:IncrementalCommonSharesAttributableToShareBasedPaymentArrangements

us-gaap:PhantomShareUnitsPSUs


Incremental
Period End2021-06-302021-03-312020-06-302020-03-31
Value502000.0486000.0295000.0248000.0
Percentage of IncrementalCommonSharesAttributableToShareBasedPaymentArrangements100.0100.0100.0100.0

us-gaap:InterestIncomeRelatedParty

us-gaap:InterestIncomeRelatedParty


Interest
Period End2021-06-302021-03-312020-06-302020-03-31
Value1.4511.4691.5231.539
Percentage of InterestIncomeRelatedParty100.0100.0100.0100.0

us-gaap:InterestIncomeRelatedParty us-gaap:RelatedPartyTransactionsByRelatedParty

srt:AffiliatedEntity


Interest
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-30
Value1.51.61.51.51.61.61.61.61.61.71.71.71.7
Percentage of InterestIncomeRelatedParty0.0105.197.50.00.00.00.00.00.00.00.00.00.0

us-gaap:InterestIncomeRelatedParty us-gaap:StatementClassOfStock

etrn:SeriesAPreferredUnits


Interest
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-31
Value0.00.0212525480.00.0
Percentage of InterestIncomeRelatedParty0.00.01435.21657.00.00.00.00.0

us-gaap:LineOfCreditFacilityInterestRateDuringPeriod dei:LegalEntity, us-gaap:CreditFacility, us-gaap:DebtInstrument

us-gaap:LineOfCreditFacilityInterestRateDuringPeriod

etrn:EQMMidstreamPartnersLP, us-gaap:RevolvingCreditFacility, etrn:EQMCreditFacility


Line
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-09-30
Value2.72.52.60.0290.0320.0370.0380.0390.037
Percentage of LineOfCreditFacilityInterestRateDuringPeriod100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:LineOfCreditFacilityInterestRateDuringPeriod dei:LegalEntity, us-gaap:DebtInstrument, us-gaap:LongtermDebtType

etrn:EQMMidstreamPartnersLP, etrn:A2019TermLoanFacility, us-gaap:UnsecuredDebt


Line
Period End2021-03-312021-01-072020-12-312020-09-302020-06-302019-12-312019-09-30
Value3.22.42.72.42.9-0.0030.036
Percentage of LineOfCreditFacilityInterestRateDuringPeriod128.00.00.092.310000.00.097.3

etrn:EurekaMidstreamLLC, etrn:EurekaCreditFacility, us-gaap:LineOfCredit


Line
Period End2021-05-132021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-30
Value2.52.402.40.0260.0394.1570.0430.045
Percentage of LineOfCreditFacilityInterestRateDuringPeriod0.096.00.092.389.7121.90.0116.2118.4

us-gaap:LineOfCreditFacilityMaximumAmountOutstandingDuringPeriod dei:LegalEntity, us-gaap:DebtInstrument, us-gaap:LongtermDebtType

us-gaap:LineOfCreditFacilityMaximumAmountOutstandingDuringPeriod

etrn:EQMMidstreamPartnersLP, etrn:EQMCreditFacility, us-gaap:LineOfCredit


Line
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-30
Value48552548520401560-10.016901160110025474
Percentage of LineOfCreditFacilityMaximumAmountOutstandingDuringPeriod100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

etrn:EurekaMidstreamLLC, etrn:EurekaCreditFacility, us-gaap:LineOfCredit


Line
Period End2021-05-132021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-30
Value3153100.0203032930.0293293
Percentage of LineOfCreditFacilityMaximumAmountOutstandingDuringPeriod0.059.00.04.114.918.8-0.017.325.3

us-gaap:OtherComprehensiveIncomeDefinedBenefitPlansTaxPortionAttributableToParent

us-gaap:OtherComprehensiveIncomeDefinedBenefitPlansTaxPortionAttributableToParent


Other
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value12000.012000.040000.010000.010000.010000.048000.07000.07000.08000.0638000.0000
Percentage of OtherComprehensiveIncomeDefinedBenefitPlansTaxPortionAttributableToParent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.00.00.0

us-gaap:OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentNetOfTax

us-gaap:OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentNetOfTax


Other
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value-35000.0-34000.0293000.0-30000.0-30000.0-30000.0265000.0-21000.0-22000.0295000.01509000.0000
Percentage of OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentNetOfTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.00.00.0

us-gaap:OtherNoncashIncomeExpense

us-gaap:OtherNoncashIncomeExpense


Other
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value9.4967.254-21.12521124.3061.851.0150.8541.9971.9851.4481.0721.0650.982
Percentage of OtherNoncashIncomeExpense100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OtherNonoperatingIncome

us-gaap:OtherNonoperatingIncome


Other
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-30
Value9.4537.599-21.78121124.1630.0240.070.7061.8611.8181.3450.9440.9040.8630.637
Percentage of OtherNonoperatingIncome100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:PartnersCapitalAccountUnitBasedCompensation

us-gaap:PartnersCapitalAccountUnitBasedCompensation


Partners
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value3.6354.6623.2621.8564.785-0.7181.511.1082.8970.4850.1010.7070.017
Percentage of PartnersCapitalAccountUnitBasedCompensation100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:PartnersCapitalAccountUnitBasedCompensation us-gaap:StatementEquityComponents

us-gaap:CommonStock


Partners
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-31
Value3.6354.6623.2621.8564.5-0.7181.510.853
Percentage of PartnersCapitalAccountUnitBasedCompensation100.0100.0100.0100.094.0100.0100.077.0

us-gaap:PartnersCapitalAccountUnitsUnitbasedCompensation us-gaap:StatementEquityComponents

us-gaap:PartnersCapitalAccountUnitsUnitbasedCompensation

us-gaap:CommonStock


Partners
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-31
Value-7000.028000.01000.0-20000.085000.053000.07000.0413000.0
Percentage of PartnersCapitalAccountUnitsUnitbasedCompensation100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:PaymentsOfDebtIssuanceCosts

us-gaap:PaymentsOfDebtIssuanceCosts


Payments
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302018-12-312018-09-302017-12-31
Value5.656240.00.098232.740.3072.563393.9540.0
Percentage of PaymentsOfDebtIssuanceCosts100.0100.00.0100.0100.0100.0100.0100.0100.0100.00.0

us-gaap:PaymentsOfDividendsPreferredStockAndPreferenceStock us-gaap:StatementClassOfStock

us-gaap:PaymentsOfDividendsPreferredStockAndPreferenceStock

us-gaap:SeriesAPreferredStock


Payments
Period End2020-12-312020-09-302020-06-302020-03-312019-12-31
Value0.010252525
Percentage of PaymentsOfDividendsPreferredStockAndPreferenceStock0.0100.0100.0100.0100.0

us-gaap:PaymentsToAcquireBusinessesGross us-gaap:BusinessAcquisition

us-gaap:PaymentsToAcquireBusinessesGross

etrn:BoltonAcquisition


Payments
Period End2020-09-302020-06-302020-03-312019-09-302019-04-10
Value852852852852863
Percentage of PaymentsToAcquireBusinessesGross100.0100.0100.0100.0100.0

us-gaap:PaymentsToAcquireEquityMethodInvestments

us-gaap:PaymentsToAcquireEquityMethodInvestments


Payments
Period End2021-06-302021-03-312020-06-302020-03-31
Value73103345
Percentage of PaymentsToAcquireEquityMethodInvestments100.0100.0100.0100.0

us-gaap:PaymentsToAcquireEquityMethodInvestments us-gaap:ConsolidatedEntities, us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName, us-gaap:StatementScenario

us-gaap:VariableInterestEntityNotPrimaryBeneficiary, etrn:MVPHoldcoProject, srt:ScenarioForecast


Payments
Period End2021-03-31
Value0.5
Percentage of PaymentsToAcquireEquityMethodInvestments4.7

us-gaap:PaymentsToAcquireEquityMethodInvestments us-gaap:ConsolidatedEntities, us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName, us-gaap:SubsequentEventType

us-gaap:VariableInterestEntityNotPrimaryBeneficiary, etrn:MVPHoldcoProject, us-gaap:SubsequentEvent


Payments
Period End2021-09-302021-08-312021-07-312021-06-302021-05-312021-04-302021-02-282021-01-31
Value4118343225140.30.8
Percentage of PaymentsToAcquireEquityMethodInvestments0.00.00.044.00.00.00.00.0

us-gaap:VariableInterestEntityNotPrimaryBeneficiary, etrn:MVPSouthgateProject, us-gaap:SubsequentEvent


Payments
Period End2021-01-31
Value0.8
Percentage of PaymentsToAcquireEquityMethodInvestments0.0

us-gaap:PaymentsToAcquireEquityMethodInvestments us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName, us-gaap:StatementScenario, us-gaap:SubsequentEventType, us-gaap:VariableInterestEntitiesByClassificationOfEntity

etrn:MVPProject, srt:ScenarioForecast, us-gaap:SubsequentEvent, us-gaap:VariableInterestEntityNotPrimaryBeneficiary


Payments
Period End2020-11-302020-09-302020-08-31
Value1125743
Percentage of PaymentsToAcquireEquityMethodInvestments0.00.00.0

us-gaap:PaymentsToAcquireEquityMethodInvestments us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName, us-gaap:StatementScenario, us-gaap:VariableInterestEntitiesByClassificationOfEntity

etrn:MVPJointVenture, srt:ScenarioForecast, us-gaap:VariableInterestEntityNotPrimaryBeneficiary


Payments
Period End2021-03-31
Value5400
Percentage of PaymentsToAcquireEquityMethodInvestments50359.0

us-gaap:PaymentsToAcquireEquityMethodInvestments us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName, us-gaap:SubsequentEventType, us-gaap:VariableInterestEntitiesByClassificationOfEntity

etrn:MVPHoldcoProject, us-gaap:SubsequentEvent, us-gaap:VariableInterestEntityNotPrimaryBeneficiary


Payments
Period End2020-11-30
Value0.3
Percentage of PaymentsToAcquireEquityMethodInvestments0.0

etrn:MVPProject, us-gaap:SubsequentEvent, us-gaap:VariableInterestEntityNotPrimaryBeneficiary


Payments
Period End2020-10-312020-07-312020-04-302019-10-312019-07-31
Value142010.06893
Percentage of PaymentsToAcquireEquityMethodInvestments0.00.00.00.00.0

etrn:MVPSouthgateProject, us-gaap:SubsequentEvent, us-gaap:VariableInterestEntityNotPrimaryBeneficiary


Payments
Period End2020-10-312020-09-302020-08-312020-07-31
Value0.71.21.11.3
Percentage of PaymentsToAcquireEquityMethodInvestments0.00.00.00.0

us-gaap:PaymentsToAcquireInterestInJointVenture

us-gaap:PaymentsToAcquireInterestInJointVenture


Payments
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value7310653345-512.8522111561444672636511756
Percentage of PaymentsToAcquireInterestInJointVenture100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:PaymentsToMinorityShareholders

us-gaap:PaymentsToMinorityShareholders


Payments
Period End2021-06-302021-03-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value0.02.50.0-238.4552380.00.01750.0
Percentage of PaymentsToMinorityShareholders0.0100.00.0100.0100.00.00.0100.00.0

us-gaap:PreferredStockRedemptionPremium us-gaap:BusinessAcquisition, us-gaap:CapitalUnitsByClass

us-gaap:PreferredStockRedemptionPremium

etrn:EQMMerger, etrn:SeriesAPreferredUnits


Preferred
Period End2020-12-312020-06-17
Value0.027
Percentage of PreferredStockRedemptionPremium0.0100.0

us-gaap:ProceedsFromCollectionOfNotesReceivable

us-gaap:ProceedsFromCollectionOfNotesReceivable


Proceeds
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value1295000.01277000.01277000.01259000.01242000.01225000.01190000.01173000.01157000.01141000.01125000.01109000.01093000.01079000.01063000.0
Percentage of ProceedsFromCollectionOfNotesReceivable100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ProceedsFromIssuanceOfDebt us-gaap:DebtInstrument, us-gaap:LongtermDebtType

us-gaap:ProceedsFromIssuanceOfDebt

etrn:A2021SeniorNotes, us-gaap:SeniorNotes


Proceeds
Period End2021-03-31
Value1876
Percentage of ProceedsFromIssuanceOfDebt100.0

us-gaap:ProceedsFromIssuanceOfDebt us-gaap:DebtInstrument, us-gaap:LongtermDebtType, us-gaap:SubsequentEventType

etrn:A2021SeniorNotes, us-gaap:SeniorNotes, us-gaap:SubsequentEvent


Proceeds
Period End2021-01-08
Value1876
Percentage of ProceedsFromIssuanceOfDebt0.0

us-gaap:ProceedsFromLinesOfCredit

us-gaap:ProceedsFromLinesOfCredit


Proceeds
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value315770.02577011705158404456849221332086304210
Percentage of ProceedsFromLinesOfCredit100.0100.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ProvisionForLoanLeaseAndOtherLosses

us-gaap:ProvisionForLoanLeaseAndOtherLosses


Provision
Period End2020-12-312020-09-302020-06-302020-03-31
Value-994000.0-821000.0-178000.0187000.0
Percentage of ProvisionForLoanLeaseAndOtherLosses100.0100.0100.0100.0

us-gaap:ProvisionForLoanLeaseAndOtherLosses us-gaap:BalanceSheetLocation

etrn:ContractAssets


Provision
Period End2020-12-312020-09-302020-06-302020-03-31
Value41000.0-405000.067000.0116000.0
Percentage of ProvisionForLoanLeaseAndOtherLosses-4.149.3-37.662.0

etrn:PreferredEquityInterest


Provision
Period End2020-12-312020-09-302020-06-302020-03-31
Value55000.057000.0-42000.011000.0
Percentage of ProvisionForLoanLeaseAndOtherLosses-5.5-6.923.65.9

us-gaap:AccountsReceivable


Provision
Period End2020-12-312020-09-302020-06-302020-03-31
Value-1090000.0-473000.0-203000.060000.0
Percentage of ProvisionForLoanLeaseAndOtherLosses109.757.6114.032.1

us-gaap:RepaymentsOfLinesOfCredit

us-gaap:RepaymentsOfLinesOfCredit


Repayments
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value460700.025170535017016554402303033712468128115
Percentage of RepaymentsOfLinesOfCredit100.0100.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:RepaymentsOfSeniorDebt

us-gaap:RepaymentsOfSeniorDebt


Repayments
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-31
Value0.019360.00.00.05941.51.5310.0
Percentage of RepaymentsOfSeniorDebt0.0100.00.00.00.0100.0100.0100.0100.00.0

us-gaap:RevenueFromRelatedParties us-gaap:RelatedPartyTransactionsByRelatedParty

us-gaap:RevenueFromRelatedParties

etrn:EQTCorporationAndSubsidiaries


Revenue
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-30
Value223224222214303278275284284272276285265220154
Percentage of RevenueFromRelatedParties100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:TemporaryEquityDividendsAdjustment

us-gaap:TemporaryEquityDividendsAdjustment


Temporary
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302019-06-30
Value14141414290.0
Percentage of TemporaryEquityDividendsAdjustment100.0100.0100.0100.0100.00.0

us-gaap:TemporaryEquityDividendsAdjustment us-gaap:StatementClassOfStock

etrn:EquitransPreferredShares


Temporary
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302019-06-30
Value14141414290.0
Percentage of TemporaryEquityDividendsAdjustment100.0100.0100.0100.0100.00.0

us-gaap:TemporaryEquityNetIncome

us-gaap:TemporaryEquityNetIncome


Temporary
Period End2021-06-302021-03-312020-09-302020-06-30
Value1414142.251
Percentage of TemporaryEquityNetIncome100.0100.0100.0100.0

us-gaap:UtilitiesOperatingExpenseMaintenanceOperationsAndOtherCostsAndExpenses

us-gaap:UtilitiesOperatingExpenseMaintenanceOperationsAndOtherCostsAndExpenses


Utilities
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-30
Value38344033413847434627444843273019
Percentage of UtilitiesOperatingExpenseMaintenanceOperationsAndOtherCostsAndExpenses100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:WeightedAverageNumberDilutedSharesOutstandingAdjustment

us-gaap:WeightedAverageNumberDilutedSharesOutstandingAdjustment


Weighted
Period End2021-06-302021-03-312020-09-302019-06-30
Value461000.0175000.048000.050000.0
Percentage of WeightedAverageNumberDilutedSharesOutstandingAdjustment100.0100.0100.0100.0

dei:EntityCommonStockSharesOutstanding

dei:EntityCommonStockSharesOutstanding


Entity
Period End2021-07-312021-04-302021-01-312020-10-31
Value432432432432
Percentage of EntityCommonStockSharesOutstanding100.0100.0100.0100.0

etrn:AccruedCapitalExpenditures us-gaap:BusinessAcquisition

etrn:AccruedCapitalExpenditures

etrn:BoltonAcquisition


Accrued
Period End2020-12-312019-12-312019-04-102018-12-31
Value56268.8-18.7
Percentage of AccruedCapitalExpenditures100.0100.0100.0100.0

etrn:AccumulatedIntangibleAssetImpairment

etrn:AccumulatedIntangibleAssetImpairment


Accumulated
Period End2020-12-312019-12-312018-12-31
Value17360.0
Percentage of AccumulatedIntangibleAssetImpairment100.0100.00.0

etrn:CapitalContributionPayable

etrn:CapitalContributionPayable


Capital
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302017-12-31
Value9372101271248745261356156169463105
Percentage of CapitalContributionPayable100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

etrn:ContractAssetsRelatedParties

etrn:ContractAssetsRelatedParties


Contract
Period End2021-06-302021-03-312020-12-31
Value1000000.0500000.02207000.0
Percentage of ContractAssetsRelatedParties100.0100.0100.0

etrn:GasAndOilLengthOfNaturalGasPipeline us-gaap:BusinessAcquisition

etrn:GasAndOilLengthOfNaturalGasPipeline

etrn:MountainValleyPipeline


Gas
Period End2021-06-30
Value300.0
Percentage of GasAndOilLengthOfNaturalGasPipeline100.0

etrn:GasandOilLengthofNaturalGasPipeline us-gaap:ConsolidatedEntities, us-gaap:BusinessAcquisition

etrn:GasandOilLengthofNaturalGasPipeline

us-gaap:VariableInterestEntityNotPrimaryBeneficiary, etrn:MountainValleyPipeline


Gasand
Period End2020-12-31
Value300.0
Percentage of GasandOilLengthofNaturalGasPipeline100.0

etrn:GasandOilLengthofNaturalGasPipeline us-gaap:PublicUtility

us-gaap:ElectricityGenerationPlantNonNuclear


Gasand
Period End2020-12-312019-12-312018-12-31
Value1130.0990.0700.0
Percentage of GasandOilLengthofNaturalGasPipeline376.70.00.0

etrn:GoodwillNetOfPurchaseAccountingAdjustmentsBeforeImpairment us-gaap:BusinessAcquisition

etrn:GoodwillNetOfPurchaseAccountingAdjustmentsBeforeImpairment

etrn:BoltonAcquisition


Goodwill
Period End2020-12-312020-09-302020-06-302020-03-312019-04-10
Value9999999999
Percentage of GoodwillNetOfPurchaseAccountingAdjustmentsBeforeImpairment100.0100.0100.0100.0100.0

etrn:InterestReceivableRelatedParties us-gaap:BalanceSheetLocation, us-gaap:RelatedPartyTransactionsByRelatedParty

etrn:InterestReceivableRelatedParties

us-gaap:OtherAssets, srt:AffiliatedEntity


Interest
Period End2020-09-302020-06-302019-12-31
Value101102105
Percentage of InterestReceivableRelatedParties100.0100.0100.0

us-gaap:OtherCurrentAssets, srt:AffiliatedEntity


Interest
Period End2020-09-302020-06-302019-12-31
Value5.25.15.0
Percentage of InterestReceivableRelatedParties5.15.04.8

etrn:IssuanceofPerformanceGuarantee us-gaap:ConsolidatedEntities, us-gaap:BusinessAcquisition

etrn:IssuanceofPerformanceGuarantee

us-gaap:VariableInterestEntityNotPrimaryBeneficiary, etrn:MountainValleyPipeline


Issuanceof
Period End2020-12-31
Value223
Percentage of IssuanceofPerformanceGuarantee100.0

etrn:OilAndGasCompressionCapacity us-gaap:PublicUtility

etrn:OilAndGasCompressionCapacity

us-gaap:ElectricityGenerationPlantNonNuclear


Oil
Period End2020-12-312019-12-312018-12-31
Value485000.0445000.0333000.0
Percentage of OilAndGasCompressionCapacity100.0100.0100.0

us-gaap:IndependentTransmissionAndDistributionSystem


Oil
Period End2020-12-312019-12-312018-12-31
Value136000.0135000.0120000.0
Percentage of OilAndGasCompressionCapacity28.030.336.0

etrn:OilAndGasDailyCapacity us-gaap:PublicUtility

etrn:OilAndGasDailyCapacity

etrn:HighPressureHeaderPipelinesMember


Oil
Period End2020-12-31
Value1.8
Percentage of OilAndGasDailyCapacity100.0

us-gaap:ElectricityGenerationPlantNonNuclear


Oil
Period End2020-12-312019-12-312018-12-31
Value7.04.42.4
Percentage of OilAndGasDailyCapacity388.90.00.0

etrn:OilAndGasNumberOfCompressorUnits us-gaap:PublicUtility

etrn:OilAndGasNumberOfCompressorUnits

us-gaap:ElectricityGenerationPlantNonNuclear


Oil
Period End2020-12-312019-12-31
Value132.0130.0
Percentage of OilAndGasNumberOfCompressorUnits100.0100.0

etrn:OilAndGasPeakWithdrawalCapacity us-gaap:PublicUtility

etrn:OilAndGasPeakWithdrawalCapacity

us-gaap:IndependentTransmissionAndDistributionSystem


Oil
Period End2020-12-31
Value900.0
Percentage of OilAndGasPeakWithdrawalCapacity100.0

etrn:OilAndGasWorkingGasCapacity us-gaap:PublicUtility

etrn:OilAndGasWorkingGasCapacity

us-gaap:IndependentTransmissionAndDistributionSystem


Oil
Period End2020-12-31
Value43.0
Percentage of OilAndGasWorkingGasCapacity100.0

etrn:UnbilledReceivablesRelatedPartiesCurrent

etrn:UnbilledReceivablesRelatedPartiesCurrent


Unbilled
Period End2020-09-30
Value11
Percentage of UnbilledReceivablesRelatedPartiesCurrent100.0

etrn:WaterSystemLengthOfWaterPipeline

etrn:WaterSystemLengthOfWaterPipeline


Water
Period End2020-12-31
Value200.0
Percentage of WaterSystemLengthOfWaterPipeline100.0

us-gaap:AccountsReceivableGrossCurrent

us-gaap:AccountsReceivableGrossCurrent


Accounts
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-31
Value254288290263238253255
Percentage of AccountsReceivableGrossCurrent100.0100.0100.0100.0100.0100.0100.0

us-gaap:AccountsReceivableRelatedParties

us-gaap:AccountsReceivableRelatedParties


Accounts
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302017-12-31
Value195181199194174183175175126183175167158
Percentage of AccountsReceivableRelatedParties100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:AccrualForEnvironmentalLossContingencies

us-gaap:AccrualForEnvironmentalLossContingencies


Accrual
Period End2020-12-312019-12-312018-12-31
Value200000.0600000.02100000.0
Percentage of AccrualForEnvironmentalLossContingencies100.0100.0100.0

us-gaap:AccruedLiabilitiesCurrentAndNoncurrent

us-gaap:AccruedLiabilitiesCurrentAndNoncurrent


Accrued
Period End2020-12-312019-12-31
Value8383
Percentage of AccruedLiabilitiesCurrentAndNoncurrent100.0100.0

us-gaap:AccruedRentCurrentAndNoncurrent

us-gaap:AccruedRentCurrentAndNoncurrent


Accrued
Period End2020-12-312019-12-31
Value9.9911
Percentage of AccruedRentCurrentAndNoncurrent100.0100.0

us-gaap:AllowanceForDoubtfulAccountsReceivable

us-gaap:AllowanceForDoubtfulAccountsReceivable


Allowance
Period End2020-12-312020-09-302020-06-302020-03-312019-12-31
Value5809000.04815000.04012000.04190000.0285000.0
Percentage of AllowanceForDoubtfulAccountsReceivable100.0100.0100.0100.0100.0

us-gaap:AllowanceForDoubtfulAccountsReceivable us-gaap:BalanceSheetLocation

etrn:ContractAssets


Allowance
Period End2020-12-312020-09-302020-06-302020-03-312019-12-31
Value181000.0222000.0183000.0116000.00
Percentage of AllowanceForDoubtfulAccountsReceivable3.14.64.62.80.0

etrn:PreferredEquityInterest


Allowance
Period End2020-12-312020-09-302020-06-302020-03-312019-12-31
Value929000.0984000.0979000.01021000.00
Percentage of AllowanceForDoubtfulAccountsReceivable16.020.424.424.40.0

us-gaap:AccountsReceivable


Allowance
Period End2020-12-312020-09-302020-06-302020-03-312019-12-31
Value4699000.03609000.02850000.03053000.0285000.0
Percentage of AllowanceForDoubtfulAccountsReceivable80.975.071.072.9100.0

us-gaap:AllowanceForDoubtfulAccountsReceivableCurrent

us-gaap:AllowanceForDoubtfulAccountsReceivableCurrent


Allowance
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302017-12-31
Value2955000.04281000.04699000.03609000.02850000.03053000.0285000.029000.0138000.0792000.075000.0717000.0446000.0
Percentage of AllowanceForDoubtfulAccountsReceivableCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:AssetRetirementObligation

us-gaap:AssetRetirementObligation


Asset
Period End2020-12-312019-12-312018-12-312017-12-312016-12-31
Value1212119.3210.0
Percentage of AssetRetirementObligation100.0100.0100.0100.00.0

us-gaap:BusinessCombinationAcquisitionOfLessThan100PercentNoncontrollingInterestFairValue us-gaap:BusinessAcquisition

us-gaap:BusinessCombinationAcquisitionOfLessThan100PercentNoncontrollingInterestFairValue

etrn:BoltonAcquisition


Business
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-04-10
Value478478478478478478478486
Percentage of BusinessCombinationAcquisitionOfLessThan100PercentNoncontrollingInterestFairValue100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedAssets us-gaap:BusinessAcquisition

us-gaap:BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedAssets

etrn:BoltonAcquisition


Business
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-04-10
Value1585158515851585158515851605
Percentage of BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedAssets100.0100.0100.0100.0100.0100.0100.0

us-gaap:BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentLiabilities us-gaap:BusinessAcquisition

us-gaap:BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentLiabilities

etrn:BoltonAcquisition


Business
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-04-10
Value42424242424252
Percentage of BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentLiabilities100.0100.0100.0100.0100.0100.0100.0

us-gaap:BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedDeferredTaxAssets us-gaap:BusinessAcquisition

us-gaap:BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedDeferredTaxAssets

etrn:BoltonAcquisition


Business
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-04-10
Value505000.0505000.0505000.0505000.0505000.0505000.05773000.0
Percentage of BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedDeferredTaxAssets100.0100.0100.0100.0100.0100.0100.0

us-gaap:BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedIntangibleAssetsOtherThanGoodwill us-gaap:BusinessAcquisition

us-gaap:BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedIntangibleAssetsOtherThanGoodwill

etrn:BoltonAcquisition


Business
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-04-10
Value311311311311311311317
Percentage of BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedIntangibleAssetsOtherThanGoodwill100.0100.0100.0100.0100.0100.0100.0

us-gaap:BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedInventory us-gaap:BusinessAcquisition

us-gaap:BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedInventory

etrn:BoltonAcquisition


Business
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-04-10
Value12121212121212
Percentage of BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedInventory100.0100.0100.0100.0100.0100.0100.0

us-gaap:BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedLiabilities us-gaap:BusinessAcquisition

us-gaap:BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedLiabilities

etrn:BoltonAcquisition


Business
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-04-10
Value353353353353353353363
Percentage of BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedLiabilities100.0100.0100.0100.0100.0100.0100.0

us-gaap:BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedPropertyPlantAndEquipment us-gaap:BusinessAcquisition

us-gaap:BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedPropertyPlantAndEquipment

etrn:BoltonAcquisition


Business
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-04-10
Value1213121312131213121312131222
Percentage of BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedPropertyPlantAndEquipment100.0100.0100.0100.0100.0100.0100.0

us-gaap:ContractWithCustomerAssetNet

us-gaap:ContractWithCustomerAssetNet


Contract
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-31
Value1611182520110.0
Percentage of ContractWithCustomerAssetNet100.0100.0100.0100.0100.0100.00.0

us-gaap:ContractWithCustomerLiability

us-gaap:ContractWithCustomerLiability


Contract
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312020-02-262019-12-31
Value5454703983212471731210.0
Percentage of ContractWithCustomerLiability100.0100.0100.0100.0100.0100.0100.00.0

us-gaap:ContractWithCustomerLiabilityNoncurrent

us-gaap:ContractWithCustomerLiabilityNoncurrent


Contract
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-31
Value5454703983212471730.0
Percentage of ContractWithCustomerLiabilityNoncurrent100.0100.0100.0100.0100.0100.00.0

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

us-gaap:DebtInstrumentCarryingAmount

etrn:EQMMidstreamPartnersLP, us-gaap:RevolvingCreditFacility, etrn:EQMCreditFacility


Debt
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-31
Value3504854854854851430610
Percentage of DebtInstrumentCarryingAmount100.0100.0100.0100.0100.0100.0100.0

us-gaap:DebtInstrumentCarryingAmount dei:LegalEntity, us-gaap:DebtInstrument, us-gaap:LongtermDebtType

etrn:EurekaMidstreamLLC, etrn:EurekaCreditFacility, us-gaap:LineOfCredit


Debt
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-31
Value300310303303303293293
Percentage of DebtInstrumentCarryingAmount85.763.962.562.562.520.548.0

us-gaap:DebtInstrumentCarryingAmount us-gaap:DebtInstrument, us-gaap:FairValueByMeasurementBasis, us-gaap:LongtermDebtType

etrn:A2019EQMTermLoanAgreement, us-gaap:CarryingReportedAmountFairValueDisclosure, etrn:TermLoans


Debt
Period End2020-12-312019-12-312018-12-31
Value139713970.0
Percentage of DebtInstrumentCarryingAmount288.2229.10.0

etrn:EQM4.00SeniorNotesDue2024, us-gaap:CarryingReportedAmountFairValueDisclosure, us-gaap:SeniorNotes


Debt
Period End2020-12-312019-12-312018-12-312017-12-31
Value497496495494
Percentage of DebtInstrumentCarryingAmount102.581.40.00.0

etrn:EQM4.125SeniorNotesdue2026, us-gaap:CarryingReportedAmountFairValueDisclosure, us-gaap:SeniorNotes


Debt
Period End2020-12-312019-12-312018-12-312017-12-31
Value494494493492
Percentage of DebtInstrumentCarryingAmount102.181.00.00.0

etrn:EQM4.75SeniorNotesDue2023, us-gaap:CarryingReportedAmountFairValueDisclosure, us-gaap:SeniorNotes


Debt
Period End2020-12-312019-12-312018-12-312017-12-31
Value1094109110890.0
Percentage of DebtInstrumentCarryingAmount225.6179.00.00.0

etrn:EQM5.50SeniorNotesDue2028, us-gaap:CarryingReportedAmountFairValueDisclosure, us-gaap:SeniorNotes


Debt
Period End2020-12-312019-12-312018-12-312017-12-31
Value8418408390.0
Percentage of DebtInstrumentCarryingAmount173.5137.80.00.0

etrn:EQM6.50SeniorNotesDue2048, us-gaap:CarryingReportedAmountFairValueDisclosure, us-gaap:SeniorNotes


Debt
Period End2020-12-312019-12-312018-12-312017-12-31
Value5395395380.0
Percentage of DebtInstrumentCarryingAmount111.288.40.00.0

etrn:EQM600SeniorNotesDue2025, us-gaap:CarryingReportedAmountFairValueDisclosure, us-gaap:SeniorNotes


Debt
Period End2020-12-31
Value690
Percentage of DebtInstrumentCarryingAmount142.4

etrn:EQM650SeniorNotesDue2027, us-gaap:CarryingReportedAmountFairValueDisclosure, us-gaap:SeniorNotes


Debt
Period End2020-12-31
Value887
Percentage of DebtInstrumentCarryingAmount183.0

etrn:EQMCreditFacility, us-gaap:CarryingReportedAmountFairValueDisclosure, us-gaap:LineOfCredit


Debt
Period End2020-12-312019-12-312018-12-312017-12-31
Value485610625180
Percentage of DebtInstrumentCarryingAmount100.0100.00.00.0

etrn:FiveHundredMillionUncommittedRevolvingLoanAgreement, us-gaap:CarryingReportedAmountFairValueDisclosure, us-gaap:LineOfCredit


Debt
Period End2020-12-312019-12-31
Value302292
Percentage of DebtInstrumentCarryingAmount62.448.0

us-gaap:DebtInstrumentCarryingAmount us-gaap:FairValueByMeasurementBasis, us-gaap:LongtermDebtType

us-gaap:CarryingReportedAmountFairValueDisclosure, us-gaap:LineOfCredit


Debt
Period End2020-12-312019-12-312018-12-312017-12-31
Value787902641466
Percentage of DebtInstrumentCarryingAmount162.4148.00.00.0

us-gaap:CarryingReportedAmountFairValueDisclosure, us-gaap:NotesPayableToBanks


Debt
Period End2020-12-312019-12-312018-12-312017-12-31
Value644354274024987
Percentage of DebtInstrumentCarryingAmount1328.5889.80.00.0

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

us-gaap:DebtInstrumentFaceAmount

etrn:EQTMidstreamPartnersLP, etrn:A2019EQMTermLoanAgreement


Debt
Period End2021-01-08
Value1400
Percentage of DebtInstrumentFaceAmount100.0

us-gaap:DebtInstrumentFaceAmount us-gaap:DebtInstrument, us-gaap:LongtermDebtType

etrn:A2019EQMTermLoanAgreement, etrn:TermLoans


Debt
Period End2020-12-312019-12-312018-12-31
Value140014000.0
Percentage of DebtInstrumentFaceAmount0.00.00.0

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Debt
Period End2020-12-312019-12-312018-12-312018-09-302017-12-31
Value11001100110011000.0
Percentage of DebtInstrumentFaceAmount0.00.00.00.00.0

etrn:EQM5.50SeniorNotesDue2028, us-gaap:SeniorNotes


Debt
Period End2020-12-312019-12-312018-12-312018-09-302017-12-31
Value8508508508500.0
Percentage of DebtInstrumentFaceAmount0.00.00.00.00.0

etrn:EQM6.50SeniorNotesDue2048, us-gaap:SeniorNotes


Debt
Period End2020-12-312019-12-312018-12-312018-09-302017-12-31
Value5505505505500.0
Percentage of DebtInstrumentFaceAmount0.00.00.00.00.0

etrn:EQM600SeniorNotesDue2025, us-gaap:SeniorNotes


Debt
Period End2020-12-31
Value700
Percentage of DebtInstrumentFaceAmount0.0

etrn:EQM650SeniorNotesDue2027, us-gaap:SeniorNotes


Debt
Period End2020-12-31
Value900
Percentage of DebtInstrumentFaceAmount0.0

etrn:EQMCreditFacility, us-gaap:LineOfCredit


Debt
Period End2020-12-312019-12-312018-12-312017-12-31
Value485610625180
Percentage of DebtInstrumentFaceAmount0.00.00.00.0

us-gaap:DebtInstrumentFaceAmount us-gaap:LongtermDebtType

us-gaap:LineOfCredit


Debt
Period End2020-12-312019-12-312018-12-312017-12-31
Value787902641466
Percentage of DebtInstrumentFaceAmount0.00.00.00.0

us-gaap:NotesPayableToBanks


Debt
Period End2020-12-312019-12-312018-12-312017-12-31
Value6500550041001000
Percentage of DebtInstrumentFaceAmount0.00.00.00.0

us-gaap:DebtInstrumentUnamortizedDiscount us-gaap:DebtInstrument, us-gaap:LongtermDebtType

us-gaap:DebtInstrumentUnamortizedDiscount

etrn:A2021SeniorNotes, us-gaap:SeniorNotes


Debt
Period End2021-03-31
Value19
Percentage of DebtInstrumentUnamortizedDiscount100.0

us-gaap:DebtInstrumentUnamortizedDiscount us-gaap:DebtInstrument, us-gaap:LongtermDebtType, us-gaap:SubsequentEventType

etrn:A2021SeniorNotes, us-gaap:SeniorNotes, us-gaap:SubsequentEvent


Debt
Period End2021-01-08
Value19
Percentage of DebtInstrumentUnamortizedDiscount0.0

us-gaap:DeferredFinanceCostsNet dei:LegalEntity, us-gaap:DebtInstrument, us-gaap:LongtermDebtType

us-gaap:DeferredFinanceCostsNet

etrn:EQTMidstreamPartnersLP, etrn:EQM4.75SeniorNotesDue2023, us-gaap:SeniorNotes


Deferred
Period End2021-01-15
Value537
Percentage of DeferredFinanceCostsNet100.0

us-gaap:DeferredFinanceCostsNet dei:LegalEntity, us-gaap:DebtInstrument, us-gaap:LongtermDebtType, us-gaap:SubsequentEventType

etrn:EQTMidstreamPartnersLP, etrn:EQM4.75SeniorNotesDue2023, us-gaap:SeniorNotes, us-gaap:SubsequentEvent


Deferred
Period End2021-01-15
Value537
Percentage of DeferredFinanceCostsNet100.0

us-gaap:DeferredFinanceCostsNet us-gaap:DebtInstrument, us-gaap:LongtermDebtType

etrn:A2021SeniorNotes, us-gaap:SeniorNotes


Deferred
Period End2021-03-31
Value4.5
Percentage of DeferredFinanceCostsNet0.0

us-gaap:DeferredFinanceCostsNet us-gaap:DebtInstrument, us-gaap:LongtermDebtType, us-gaap:SubsequentEventType

etrn:A2021SeniorNotes, us-gaap:SeniorNotes, us-gaap:SubsequentEvent


Deferred
Period End2021-01-08
Value4.5
Percentage of DeferredFinanceCostsNet0.0

us-gaap:DeferredIncomeTaxLiabilities

us-gaap:DeferredIncomeTaxLiabilities


Deferred
Period End2020-12-31
Value345
Percentage of DeferredIncomeTaxLiabilities100.0

us-gaap:DeferredTaxAssetsOperatingLossCarryforwards

us-gaap:DeferredTaxAssetsOperatingLossCarryforwards


Deferred
Period End2020-12-312019-12-312018-12-312017-12-31
Value5449360.0
Percentage of DeferredTaxAssetsOperatingLossCarryforwards100.0100.0100.00.0

us-gaap:DeferredTaxLiabilitiesInvestments

us-gaap:DeferredTaxLiabilitiesInvestments


Deferred
Period End2020-12-31
Value379
Percentage of DeferredTaxLiabilitiesInvestments100.0

us-gaap:DeferredTaxLiabilitiesOther

us-gaap:DeferredTaxLiabilitiesOther


Deferred
Period End2020-12-312019-12-31
Value3132000.01023000.0
Percentage of DeferredTaxLiabilitiesOther100.0100.0

us-gaap:DeferredTaxLiabilitiesTaxDeferredIncome

us-gaap:DeferredTaxLiabilitiesTaxDeferredIncome


Deferred
Period End2020-12-31
Value18
Percentage of DeferredTaxLiabilitiesTaxDeferredIncome100.0

us-gaap:DerivativeAssetMeasurementInput us-gaap:MeasurementInputType, us-gaap:ValuationTechnique

us-gaap:DerivativeAssetMeasurementInput

us-gaap:MeasurementInputPriceVolatility, us-gaap:MarketApproachValuationTechnique


Derivative
Period End2021-06-302021-03-31
Value32.031.0
Percentage of DerivativeAssetMeasurementInput100.0100.0

us-gaap:DerivativeAssetsNoncurrent us-gaap:BalanceSheetLocation, us-gaap:DerivativeInstrumentRisk

us-gaap:DerivativeAssetsNoncurrent

us-gaap:OtherCurrentAssets, us-gaap:OtherContract


Derivative
Period End2020-09-302020-06-30
Value3518
Percentage of DerivativeAssetsNoncurrent100.0100.0

us-gaap:OtherNoncurrentAssets, us-gaap:OtherContract


Derivative
Period End2020-09-302020-06-30
Value5350
Percentage of DerivativeAssetsNoncurrent152.7278.9

us-gaap:DerivativeAssetsNoncurrent us-gaap:DerivativeInstrumentRisk

us-gaap:OtherContract


Derivative
Period End2021-06-302021-03-312020-12-312020-09-302020-06-30
Value8475688968
Percentage of DerivativeAssetsNoncurrent0.00.00.0252.7378.9

us-gaap:EmployeeRelatedLiabilitiesCurrentAndNoncurrent

us-gaap:EmployeeRelatedLiabilitiesCurrentAndNoncurrent


Employee
Period End2020-12-312019-12-31
Value4646
Percentage of EmployeeRelatedLiabilitiesCurrentAndNoncurrent100.0100.0

us-gaap:EmployeeRelatedLiabilitiesCurrentAndNoncurrent us-gaap:AwardType

etrn:RestrictedStockUnitsLiability


Employee
Period End2020-12-312019-12-312018-12-31
Value4.54.24.5
Percentage of EmployeeRelatedLiabilitiesCurrentAndNoncurrent9.89.00.0

us-gaap:EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized us-gaap:AwardType

us-gaap:EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized

us-gaap:RestrictedStock


Employee
Period End2020-12-312019-12-312018-12-31
Value6900000.05600000.02000000.0
Percentage of EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized100.0100.0100.0

us-gaap:EquityMethodInvestmentOwnershipPercentage dei:LegalEntity, us-gaap:ConsolidatedEntities, us-gaap:Ownership, us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName

us-gaap:EquityMethodInvestmentOwnershipPercentage

etrn:EQMMidstreamPartnersLP, us-gaap:VariableInterestEntityNotPrimaryBeneficiary, etrn:EquitransMidstream, etrn:MVPJointVenture


Equity
Period End2020-12-31
Value47.6
Percentage of EquityMethodInvestmentOwnershipPercentage100.0

etrn:EQTMidstreamPartnersLP, us-gaap:VariableInterestEntityNotPrimaryBeneficiary, etrn:EquitransMidstream, etrn:MVPJointVenture


Equity
Period End2020-12-31
Value46.2
Percentage of EquityMethodInvestmentOwnershipPercentage97.1

etrn:EQTMidstreamPartnersLP, us-gaap:VariableInterestEntityNotPrimaryBeneficiary, etrn:EquitransMidstream, etrn:MVPSouthgateProject


Equity
Period End2020-12-31
Value47.2
Percentage of EquityMethodInvestmentOwnershipPercentage99.2

us-gaap:EquityMethodInvestmentOwnershipPercentage dei:LegalEntity, us-gaap:ConsolidatedEntities, us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName

etrn:EQMMidstreamPartnersLP, us-gaap:VariableInterestEntityNotPrimaryBeneficiary, etrn:MVPJointVenture


Equity
Period End2021-06-302021-03-31
Value46.446.2
Percentage of EquityMethodInvestmentOwnershipPercentage0.00.0

us-gaap:EquityMethodInvestmentOwnershipPercentage dei:LegalEntity, us-gaap:ConsolidatedEntities, us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName, us-gaap:StatementScenario

etrn:EQMMidstreamPartnersLP, us-gaap:VariableInterestEntityNotPrimaryBeneficiary, etrn:MVPJointVenture, srt:ScenarioForecast


Equity
Period End2021-12-31
Value47.8
Percentage of EquityMethodInvestmentOwnershipPercentage0.0

us-gaap:EquityMethodInvestmentOwnershipPercentage dei:LegalEntity, us-gaap:Ownership

etrn:EQTCorporationAndSubsidiaries, etrn:EquitransMidstream


Equity
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-31
Value5.85.85.85.90.0590.11
Percentage of EquityMethodInvestmentOwnershipPercentage0.00.012.20.00.00.0

us-gaap:EquityMethodInvestmentOwnershipPercentage dei:LegalEntity, us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName, us-gaap:StatementScenario, us-gaap:VariableInterestEntitiesByClassificationOfEntity

etrn:EQMMidstreamPartnersLP, etrn:MVPJointVenture, srt:ScenarioForecast, us-gaap:VariableInterestEntityNotPrimaryBeneficiary


Equity
Period End2020-12-31
Value0.47
Percentage of EquityMethodInvestmentOwnershipPercentage1.0

etrn:EQMMidstreamPartnersLP, etrn:MVPJointVenture, us-gaap:ScenarioForecast, us-gaap:VariableInterestEntityNotPrimaryBeneficiary


Equity
Period End2020-12-31
Value0.47
Percentage of EquityMethodInvestmentOwnershipPercentage1.0

us-gaap:EquityMethodInvestmentOwnershipPercentage dei:LegalEntity, us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName, us-gaap:VariableInterestEntitiesByClassificationOfEntity

etrn:EQMMidstreamPartnersLP, etrn:MVPJointVenture, us-gaap:VariableInterestEntityNotPrimaryBeneficiary


Equity
Period End2020-09-302020-06-302020-03-312019-12-31
Value45.90.4570.4570.455
Percentage of EquityMethodInvestmentOwnershipPercentage0.00.00.00.0

us-gaap:EquityMethodInvestmentOwnershipPercentage us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName, us-gaap:VariableInterestEntitiesByClassificationOfEntity

etrn:MVPSouthgateProject, us-gaap:VariableInterestEntityNotPrimaryBeneficiary


Equity
Period End2020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-09-30
Value47.20.4720.4720.4720.4720.4720.327
Percentage of EquityMethodInvestmentOwnershipPercentage0.00.00.00.00.00.00.0

us-gaap:EquityMethodInvestmentSummarizedFinancialInformationAssets us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName

us-gaap:EquityMethodInvestmentSummarizedFinancialInformationAssets

etrn:MVPJointVenture


Equity
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302017-12-31
Value5831559253565054524248694223391035911077
Percentage of EquityMethodInvestmentSummarizedFinancialInformationAssets100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:EquityMethodInvestmentSummarizedFinancialInformationCurrentAssets us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName

us-gaap:EquityMethodInvestmentSummarizedFinancialInformationCurrentAssets

etrn:MVPJointVenture


Equity
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302017-12-31
Value2902652181025078366966871260330
Percentage of EquityMethodInvestmentSummarizedFinancialInformationCurrentAssets100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:EquityMethodInvestmentSummarizedFinancialInformationCurrentLiabilities us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName

us-gaap:EquityMethodInvestmentSummarizedFinancialInformationCurrentLiabilities

etrn:MVPJointVenture


Equity
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302017-12-31
Value18719719522346842057161772665
Percentage of EquityMethodInvestmentSummarizedFinancialInformationCurrentLiabilities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:EquityMethodInvestmentSummarizedFinancialInformationEquity us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName

us-gaap:EquityMethodInvestmentSummarizedFinancialInformationEquity

etrn:MVPJointVenture


Equity
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302017-12-31
Value5643539551604830477244473649329328641012
Percentage of EquityMethodInvestmentSummarizedFinancialInformationEquity100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:EquityMethodInvestmentSummarizedFinancialInformationLiabilitiesAndEquity us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName

us-gaap:EquityMethodInvestmentSummarizedFinancialInformationLiabilitiesAndEquity

etrn:MVPJointVenture


Equity
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302017-12-31
Value5831559253565054524248694223391035911077
Percentage of EquityMethodInvestmentSummarizedFinancialInformationLiabilitiesAndEquity100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:EquityMethodInvestmentSummarizedFinancialInformationNoncurrentAssets us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName

us-gaap:EquityMethodInvestmentSummarizedFinancialInformationNoncurrentAssets

etrn:MVPJointVenture


Equity
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302017-12-31
Value554053275138495147354033352632232330747
Percentage of EquityMethodInvestmentSummarizedFinancialInformationNoncurrentAssets100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:EquityMethodInvestments us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName

us-gaap:EquityMethodInvestments

etrn:MVPJointVenture


Equity
Period End2020-12-31
Value2800
Percentage of EquityMethodInvestments100.0

us-gaap:FiniteLivedIntangibleAssetsAccumulatedAmortization

us-gaap:FiniteLivedIntangibleAssetsAccumulatedAmortization


Finite
Period End2020-12-312019-12-312018-12-312017-12-31
Value163100475.5
Percentage of FiniteLivedIntangibleAssetsAccumulatedAmortization100.0100.0100.0100.0

us-gaap:FiniteLivedIntangibleAssetsAccumulatedAmortization us-gaap:BusinessAcquisition

etrn:BoltonAcquisition


Finite
Period End2020-12-312019-12-31
Value2111
Percentage of FiniteLivedIntangibleAssetsAccumulatedAmortization13.211.7

us-gaap:FiniteLivedIntangibleAssetsAmortizationExpenseAfterYearFive us-gaap:BusinessAcquisition

us-gaap:FiniteLivedIntangibleAssetsAmortizationExpenseAfterYearFive

etrn:EurekaMidstreamHoldingsLLC


Finite
Period End2020-09-30
Value23
Percentage of FiniteLivedIntangibleAssetsAmortizationExpenseAfterYearFive100.0

us-gaap:FiniteLivedIntangibleAssetsAmortizationExpenseNextTwelveMonths us-gaap:BusinessAcquisition

us-gaap:FiniteLivedIntangibleAssetsAmortizationExpenseNextTwelveMonths

etrn:EurekaMidstreamHoldingsLLC


Finite
Period End2020-09-30
Value5800000.0
Percentage of FiniteLivedIntangibleAssetsAmortizationExpenseNextTwelveMonths100.0

us-gaap:FiniteLivedIntangibleAssetsAmortizationExpenseYearFive us-gaap:BusinessAcquisition

us-gaap:FiniteLivedIntangibleAssetsAmortizationExpenseYearFive

etrn:EurekaMidstreamHoldingsLLC


Finite
Period End2020-09-30
Value23
Percentage of FiniteLivedIntangibleAssetsAmortizationExpenseYearFive100.0

us-gaap:FiniteLivedIntangibleAssetsAmortizationExpenseYearFour us-gaap:BusinessAcquisition

us-gaap:FiniteLivedIntangibleAssetsAmortizationExpenseYearFour

etrn:EurekaMidstreamHoldingsLLC


Finite
Period End2020-09-30
Value23
Percentage of FiniteLivedIntangibleAssetsAmortizationExpenseYearFour100.0

us-gaap:FiniteLivedIntangibleAssetsAmortizationExpenseYearThree us-gaap:BusinessAcquisition

us-gaap:FiniteLivedIntangibleAssetsAmortizationExpenseYearThree

etrn:EurekaMidstreamHoldingsLLC


Finite
Period End2020-09-30
Value23
Percentage of FiniteLivedIntangibleAssetsAmortizationExpenseYearThree100.0

us-gaap:FiniteLivedIntangibleAssetsAmortizationExpenseYearTwo us-gaap:BusinessAcquisition

us-gaap:FiniteLivedIntangibleAssetsAmortizationExpenseYearTwo

etrn:EurekaMidstreamHoldingsLLC


Finite
Period End2020-09-30
Value23
Percentage of FiniteLivedIntangibleAssetsAmortizationExpenseYearTwo100.0

us-gaap:FiniteLivedIntangibleAssetsGross

us-gaap:FiniteLivedIntangibleAssetsGross


Finite
Period End2020-12-312019-12-312018-12-31
Value897934623
Percentage of FiniteLivedIntangibleAssetsGross100.0100.0100.0

us-gaap:FiniteLivedIntangibleAssetsGross us-gaap:BusinessAcquisition

etrn:BoltonAcquisition


Finite
Period End2020-12-312019-12-31
Value274311
Percentage of FiniteLivedIntangibleAssetsGross30.633.3

us-gaap:GasImbalanceAssetLiability

us-gaap:GasImbalanceAssetLiability


Gas
Period End2020-12-312019-12-312018-12-312017-12-31
Value1800000.003300000.05200000.0
Percentage of GasImbalanceAssetLiability100.00.0100.0100.0

us-gaap:HostingArrangementServiceContractImplementationCostCapitalizedAccumulatedAmortization

us-gaap:HostingArrangementServiceContractImplementationCostCapitalizedAccumulatedAmortization


Hosting
Period End2020-12-31
Value500000.0
Percentage of HostingArrangementServiceContractImplementationCostCapitalizedAccumulatedAmortization100.0

us-gaap:HostingArrangementServiceContractImplementationCostCapitalizedBeforeAccumulatedAmortization

us-gaap:HostingArrangementServiceContractImplementationCostCapitalizedBeforeAccumulatedAmortization


Hosting
Period End2020-12-312019-12-31
Value8800000.05700000.0
Percentage of HostingArrangementServiceContractImplementationCostCapitalizedBeforeAccumulatedAmortization100.0100.0

us-gaap:InterestAndDividendsPayableCurrent

us-gaap:InterestAndDividendsPayableCurrent


Interest
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302017-12-31
Value1547912667794473417341804611
Percentage of InterestAndDividendsPayableCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueNextTwelveMonths

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueNextTwelveMonths


Lessee
Period End2020-12-31
Value12
Percentage of LesseeOperatingLeaseLiabilityPaymentsDueNextTwelveMonths100.0

us-gaap:LettersOfCreditOutstandingAmount us-gaap:ConsolidatedEntities, us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName

us-gaap:LettersOfCreditOutstandingAmount

us-gaap:VariableInterestEntityNotPrimaryBeneficiary, etrn:MVPProject


Letters
Period End2020-12-312020-03-31
Value231220
Percentage of LettersOfCreditOutstandingAmount100.0100.0

us-gaap:LettersOfCreditOutstandingAmount us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName

etrn:MVPProject


Letters
Period End2021-03-312020-09-302020-06-302020-03-31
Value231220220220
Percentage of LettersOfCreditOutstandingAmount0.00.00.0100.0

us-gaap:LettersOfCreditOutstandingAmount us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName, us-gaap:SubsequentEventType

etrn:MVPProject, us-gaap:SubsequentEvent


Letters
Period End2021-08-032021-05-042020-11-03
Value251273231
Percentage of LettersOfCreditOutstandingAmount0.00.00.0

us-gaap:LineOfCreditFacilityMaximumBorrowingCapacity dei:LegalEntity, us-gaap:DebtInstrument, us-gaap:LongtermDebtType

us-gaap:LineOfCreditFacilityMaximumBorrowingCapacity

etrn:EurekaMidstreamLLC, etrn:EurekaCreditFacility, etrn:SameDaySwingLineAdvances


Line
Period End2021-05-13
Value25
Percentage of LineOfCreditFacilityMaximumBorrowingCapacity100.0

us-gaap:LineOfCreditFacilityMaximumBorrowingCapacity us-gaap:DebtInstrument

etrn:EQMCreditFacility


Line
Period End2021-04-16
Value2250
Percentage of LineOfCreditFacilityMaximumBorrowingCapacity0.0

us-gaap:LineOfCreditFacilityMaximumBorrowingCapacity us-gaap:DebtInstrument, us-gaap:SubsequentEventType

etrn:EQMCreditFacility, us-gaap:SubsequentEvent


Line
Period End2021-04-16
Value2250
Percentage of LineOfCreditFacilityMaximumBorrowingCapacity0.0

us-gaap:LongTermDebtFairValue dei:LegalEntity, us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FairValueByMeasurementBasis, us-gaap:FairValueByMeasurementFrequency, us-gaap:LongtermDebtType

us-gaap:LongTermDebtFairValue

etrn:EQMMidstreamPartnersLP, us-gaap:FairValueInputsLevel2, us-gaap:CarryingReportedAmountFairValueDisclosure, us-gaap:FairValueMeasurementsRecurring, us-gaap:SeniorNotes


Long
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302018-12-31
Value642964275046504350413463346234613457
Percentage of LongTermDebtFairValue100.0100.0100.0100.0100.0100.0100.0100.0100.0

etrn:EQMMidstreamPartnersLP, us-gaap:FairValueInputsLevel2, us-gaap:EstimateOfFairValueFairValueDisclosure, us-gaap:FairValueMeasurementsRecurring, us-gaap:SeniorNotes


Long
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302018-12-31
Value689166815495513950152267342134393425
Percentage of LongTermDebtFairValue107.2104.0108.9101.999.565.598.899.499.1

us-gaap:LongTermDebtFairValue us-gaap:DebtInstrument, us-gaap:FairValueByMeasurementBasis, us-gaap:LongtermDebtType

etrn:A2019EQMTermLoanAgreement, us-gaap:EstimateOfFairValueFairValueDisclosure, etrn:TermLoans


Long
Period End2020-12-312019-12-312018-12-31
Value140014000.0
Percentage of LongTermDebtFairValue27.740.40.0

etrn:EQM4.00SeniorNotesDue2024, us-gaap:EstimateOfFairValueFairValueDisclosure, us-gaap:SeniorNotes


Long
Period End2020-12-312019-12-312018-12-312017-12-31
Value515486479504
Percentage of LongTermDebtFairValue10.214.113.90.0

etrn:EQM4.125SeniorNotesdue2026, us-gaap:EstimateOfFairValueFairValueDisclosure, us-gaap:SeniorNotes


Long
Period End2020-12-312019-12-312018-12-312017-12-31
Value512471454501
Percentage of LongTermDebtFairValue10.213.613.10.0

etrn:EQM4.75SeniorNotesDue2023, us-gaap:EstimateOfFairValueFairValueDisclosure, us-gaap:SeniorNotes


Long
Period End2020-12-312019-12-312018-12-312017-12-31
Value1162110410990.0
Percentage of LongTermDebtFairValue23.031.931.80.0

etrn:EQM5.50SeniorNotesDue2028, us-gaap:EstimateOfFairValueFairValueDisclosure, us-gaap:SeniorNotes


Long
Period End2020-12-312019-12-312018-12-312017-12-31
Value9338398410.0
Percentage of LongTermDebtFairValue18.524.224.30.0

etrn:EQM6.50SeniorNotesDue2048, us-gaap:EstimateOfFairValueFairValueDisclosure, us-gaap:SeniorNotes


Long
Period End2020-12-312019-12-312018-12-312017-12-31
Value5825185490.0
Percentage of LongTermDebtFairValue11.615.015.90.0

etrn:EQM600SeniorNotesDue2025, us-gaap:EstimateOfFairValueFairValueDisclosure, us-gaap:SeniorNotes


Long
Period End2020-12-31
Value767
Percentage of LongTermDebtFairValue15.2

etrn:EQM650SeniorNotesDue2027, us-gaap:EstimateOfFairValueFairValueDisclosure, us-gaap:SeniorNotes


Long
Period End2020-12-31
Value1020
Percentage of LongTermDebtFairValue20.2

etrn:EQMCreditFacility, us-gaap:EstimateOfFairValueFairValueDisclosure, us-gaap:LineOfCredit


Long
Period End2020-12-312019-12-312018-12-312017-12-31
Value485610625180
Percentage of LongTermDebtFairValue9.617.618.10.0

etrn:FiveHundredMillionUncommittedRevolvingLoanAgreement, us-gaap:EstimateOfFairValueFairValueDisclosure, us-gaap:LineOfCredit


Long
Period End2020-12-312019-12-31
Value302292
Percentage of LongTermDebtFairValue6.08.4

us-gaap:LongTermDebtFairValue us-gaap:FairValueByMeasurementBasis, us-gaap:LongtermDebtType

us-gaap:EstimateOfFairValueFairValueDisclosure, us-gaap:LineOfCredit


Long
Period End2020-12-312019-12-312018-12-312017-12-31
Value787902641466
Percentage of LongTermDebtFairValue15.626.118.60.0

us-gaap:EstimateOfFairValueFairValueDisclosure, us-gaap:NotesPayableToBanks


Long
Period End2020-12-312019-12-312018-12-312017-12-31
Value6894541640141006
Percentage of LongTermDebtFairValue136.6156.4116.10.0

us-gaap:LongTermDebtMaturitiesRepaymentsOfPrincipalAfterYearFive

us-gaap:LongTermDebtMaturitiesRepaymentsOfPrincipalAfterYearFive


Long
Period End2020-12-31
Value2800
Percentage of LongTermDebtMaturitiesRepaymentsOfPrincipalAfterYearFive100.0

us-gaap:LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFive

us-gaap:LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFive


Long
Period End2020-12-31
Value700
Percentage of LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFive100.0

us-gaap:LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFour

us-gaap:LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFour


Long
Period End2020-12-31
Value500
Percentage of LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFour100.0

us-gaap:LongTermDebtMaturitiesRepaymentsOfPrincipalInYearThree

us-gaap:LongTermDebtMaturitiesRepaymentsOfPrincipalInYearThree


Long
Period End2020-12-31
Value1100
Percentage of LongTermDebtMaturitiesRepaymentsOfPrincipalInYearThree100.0

us-gaap:LongTermDebtMaturitiesRepaymentsOfPrincipalInYearTwo

us-gaap:LongTermDebtMaturitiesRepaymentsOfPrincipalInYearTwo


Long
Period End2020-12-31
Value1400
Percentage of LongTermDebtMaturitiesRepaymentsOfPrincipalInYearTwo100.0

us-gaap:LongTermLineOfCredit

us-gaap:LongTermLineOfCredit


Long
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302017-12-31
Value65048548548578717229025571372109564122466
Percentage of LongTermLineOfCredit100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:LongTermLineOfCredit dei:LegalEntity, us-gaap:CreditFacility, us-gaap:DebtInstrument

etrn:EQMMidstreamPartnersLP, us-gaap:RevolvingCreditFacility, etrn:EQMCreditFacility


Long
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302018-12-31
Value2742462462352352351.01.01.0
Percentage of LongTermLineOfCredit42.250.750.748.529.813.60.10.20.2

us-gaap:LongTermLoansPayable

us-gaap:LongTermLoansPayable


Long
Period End2020-12-312020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312017-12-31
Value3980.05625625625625620.0
Percentage of LongTermLoansPayable100.00.0100.0100.0100.0100.0100.00.0

us-gaap:NotesReceivableFairValueDisclosure dei:LegalEntity, us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FairValueByMeasurementBasis, us-gaap:RelatedPartyTransactionsByRelatedParty

us-gaap:NotesReceivableFairValueDisclosure

etrn:EQMMidstreamPartnersLP, us-gaap:FairValueInputsLevel3, us-gaap:CarryingReportedAmountFairValueDisclosure, srt:AffiliatedEntity


Notes
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302018-12-31
Value102104105106108109110111115
Percentage of NotesReceivableFairValueDisclosure100.0100.0100.0100.0100.0100.0100.0100.0100.0

etrn:EQMMidstreamPartnersLP, us-gaap:FairValueInputsLevel3, us-gaap:EstimateOfFairValueFairValueDisclosure, srt:AffiliatedEntity


Notes
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302018-12-31
Value121120127127129120126128122
Percentage of NotesReceivableFairValueDisclosure118.6115.4121.0119.5119.4110.1114.5115.3106.1

us-gaap:NotesReceivableRelatedParties

us-gaap:NotesReceivableRelatedParties


Notes
Period End2021-06-302021-03-312020-12-312019-12-312018-12-312017-12-31
Value102103105110114119
Percentage of NotesReceivableRelatedParties100.0100.0100.0100.0100.0100.0

us-gaap:OperatingLeaseWeightedAverageDiscountRatePercent

us-gaap:OperatingLeaseWeightedAverageDiscountRatePercent


Operating
Period End2020-12-312019-12-31
Value5.75.5
Percentage of OperatingLeaseWeightedAverageDiscountRatePercent100.0100.0

us-gaap:OperatingLossCarryforwards us-gaap:IncomeTaxAuthority

us-gaap:OperatingLossCarryforwards

us-gaap:DomesticCountry


Operating
Period End2020-12-312019-12-31
Value4139
Percentage of OperatingLossCarryforwards100.0100.0

us-gaap:StateAndLocalJurisdiction


Operating
Period End2020-12-312019-12-31
Value1310
Percentage of OperatingLossCarryforwards32.626.7

us-gaap:OtherAccruedLiabilitiesCurrentAndNoncurrent

us-gaap:OtherAccruedLiabilitiesCurrentAndNoncurrent


Other
Period End2020-12-312019-12-31
Value7776000.05344000.0
Percentage of OtherAccruedLiabilitiesCurrentAndNoncurrent100.0100.0

us-gaap:PartnersCapitalAttributableToNoncontrollingInterest

us-gaap:PartnersCapitalAttributableToNoncontrollingInterest


Partners
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302017-12-31
Value47547247146746346074609479649183313480152175094
Percentage of PartnersCapitalAttributableToNoncontrollingInterest100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:PartnersCapitalIncludingPortionAttributableToNoncontrollingInterest

us-gaap:PartnersCapitalIncludingPortionAttributableToNoncontrollingInterest


Partners
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302017-12-31
Value3644368036813639354750445282594162454677525954756238
Percentage of PartnersCapitalIncludingPortionAttributableToNoncontrollingInterest100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:PreferredStockSharesOutstanding

us-gaap:PreferredStockSharesOutstanding


Preferred
Period End2020-12-312019-12-31
Value300.0
Percentage of PreferredStockSharesOutstanding100.00.0

us-gaap:PublicUtilitiesPropertyPlantAndEquipmentAccumulatedDepreciation us-gaap:PublicUtility

us-gaap:PublicUtilitiesPropertyPlantAndEquipmentAccumulatedDepreciation

us-gaap:ElectricityGenerationPlantNonNuclear


Public
Period End2020-12-312019-12-312018-12-312017-12-31
Value543478247153
Percentage of PublicUtilitiesPropertyPlantAndEquipmentAccumulatedDepreciation100.0100.0100.0100.0

us-gaap:IndependentTransmissionAndDistributionSystem


Public
Period End2020-12-312019-12-312018-12-312017-12-31
Value370326286248
Percentage of PublicUtilitiesPropertyPlantAndEquipmentAccumulatedDepreciation68.268.2115.7161.6

us-gaap:WaterPlant


Public
Period End2020-12-312019-12-312018-12-312017-12-31
Value9053263.363
Percentage of PublicUtilitiesPropertyPlantAndEquipmentAccumulatedDepreciation16.711.110.72.2

us-gaap:PublicUtilitiesPropertyPlantAndEquipmentAccumulatedDepreciation us-gaap:PublicUtilityRegulatedOrUnregulatedStatus

us-gaap:RegulatedOperation


Public
Period End2020-12-312019-12-312018-12-312017-12-31
Value370436317278
Percentage of PublicUtilitiesPropertyPlantAndEquipmentAccumulatedDepreciation68.291.2128.4181.3

us-gaap:PublicUtilitiesPropertyPlantAndEquipmentNet

us-gaap:PublicUtilitiesPropertyPlantAndEquipmentNet


Public
Period End2020-12-312019-12-312018-12-312017-12-31
Value7827772358675110
Percentage of PublicUtilitiesPropertyPlantAndEquipmentNet100.0100.0100.0100.0

us-gaap:PublicUtilitiesPropertyPlantAndEquipmentNet us-gaap:PublicUtility

us-gaap:ElectricityGenerationPlantNonNuclear


Public
Period End2020-12-312019-12-312018-12-312017-12-31
Value6148603441403489
Percentage of PublicUtilitiesPropertyPlantAndEquipmentNet78.578.170.668.3

us-gaap:IndependentTransmissionAndDistributionSystem


Public
Period End2020-12-312019-12-312018-12-312017-12-31
Value1506151814981425
Percentage of PublicUtilitiesPropertyPlantAndEquipmentNet19.319.725.527.9

us-gaap:OtherPlantInService


Public
Period End2020-12-312019-12-312018-12-312017-12-31
Value118.845615.648
Percentage of PublicUtilitiesPropertyPlantAndEquipmentNet0.10.11.00.1

us-gaap:WaterPlant


Public
Period End2020-12-312019-12-312018-12-312017-12-31
Value161161167190
Percentage of PublicUtilitiesPropertyPlantAndEquipmentNet2.12.12.93.7

us-gaap:PublicUtilitiesPropertyPlantAndEquipmentNet us-gaap:PublicUtilityRegulatedOrUnregulatedStatus

us-gaap:RegulatedOperation


Public
Period End2020-12-312019-12-312018-12-312017-12-31
Value1507151915821508
Percentage of PublicUtilitiesPropertyPlantAndEquipmentNet19.319.727.029.5

us-gaap:PublicUtilitiesPropertyPlantAndEquipmentPlantInService us-gaap:PublicUtility

us-gaap:PublicUtilitiesPropertyPlantAndEquipmentPlantInService

us-gaap:ElectricityGenerationPlantNonNuclear


Public
Period End2020-12-312019-12-312018-12-312017-12-31
Value6691651243873642
Percentage of PublicUtilitiesPropertyPlantAndEquipmentPlantInService100.0100.0100.0100.0

us-gaap:IndependentTransmissionAndDistributionSystem


Public
Period End2020-12-312019-12-312018-12-312017-12-31
Value1877184417851674
Percentage of PublicUtilitiesPropertyPlantAndEquipmentPlantInService28.128.340.746.0

us-gaap:WaterPlant


Public
Period End2020-12-312019-12-312018-12-312017-12-31
Value251215194193
Percentage of PublicUtilitiesPropertyPlantAndEquipmentPlantInService3.83.34.45.3

us-gaap:PublicUtilitiesPropertyPlantAndEquipmentPlantInService us-gaap:PublicUtilityRegulatedOrUnregulatedStatus

us-gaap:RegulatedOperation


Public
Period End2020-12-312019-12-312018-12-312017-12-31
Value1878195519001787
Percentage of PublicUtilitiesPropertyPlantAndEquipmentPlantInService28.130.043.349.1

us-gaap:PurchaseObligation

us-gaap:PurchaseObligation


Purchase
Period End2020-12-31
Value10
Percentage of PurchaseObligation100.0

us-gaap:RegulatoryAssets

us-gaap:RegulatoryAssets


Regulatory
Period End2020-12-312019-12-312018-12-312017-12-31
Value94482624
Percentage of RegulatoryAssets100.0100.0100.0100.0

us-gaap:RegulatoryAssets us-gaap:RegulatoryAsset

us-gaap:DeferredIncomeTaxCharges


Regulatory
Period End2020-12-312019-12-312018-12-312017-12-31
Value89432218
Percentage of RegulatoryAssets94.790.583.875.3

us-gaap:OtherRegulatoryAssetsLiabilities


Regulatory
Period End2020-12-312019-12-312018-12-312017-12-31
Value4.964.554.3126.165
Percentage of RegulatoryAssets5.39.516.224.7

us-gaap:RegulatoryLiabilities

us-gaap:RegulatoryLiabilities


Regulatory
Period End2020-12-312019-12-312018-12-312017-12-31
Value21212019
Percentage of RegulatoryLiabilities100.0100.0100.0100.0

us-gaap:RegulatoryLiabilities us-gaap:RegulatoryLiability

us-gaap:DeferredIncomeTaxCharges


Regulatory
Period End2020-12-312019-12-312018-12-312017-12-31
Value10101011
Percentage of RegulatoryLiabilities48.050.052.756.9

us-gaap:PostretirementBenefitCosts


Regulatory
Period End2020-12-312019-12-312018-12-312017-12-31
Value1011107.724
Percentage of RegulatoryLiabilities52.053.448.938.8

us-gaap:RevenueRemainingPerformanceObligation

us-gaap:RevenueRemainingPerformanceObligation


Revenue
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-30
Value51476410272505107401041258462692893207
Percentage of RevenueRemainingPerformanceObligation100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:RevenueRemainingPerformanceObligation us-gaap:ContractWithCustomerBasisOfPricing, us-gaap:StatementBusinessSegments

etrn:MinimumVolumeCommitmentContract, etrn:GasGatheringSegment


Revenue
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-30
Value254381508125263382133414555650.0
Percentage of RevenueRemainingPerformanceObligation49.549.949.550.151.551.612.916.09.98.07.40.0

us-gaap:TimeAndMaterialsContract, etrn:GasGatheringSegment


Revenue
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-30
Value79119159225176517124253353476113
Percentage of RevenueRemainingPerformanceObligation15.515.715.58.810.010.349.748.254.851.153.454.6

us-gaap:RevenueRemainingPerformanceObligation us-gaap:StatementBusinessSegments

etrn:GasTransmissionSegment


Revenue
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-30
Value178261357941782553549216328335194
Percentage of RevenueRemainingPerformanceObligation34.834.334.837.535.034.534.035.935.340.939.345.4

etrn:WaterServices


Revenue
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-31
Value1.01.52.0289.006182735
Percentage of RevenueRemainingPerformanceObligation0.20.20.23.63.53.63.4

us-gaap:SeniorLongTermNotes

us-gaap:SeniorLongTermNotes


Senior
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302017-12-31
Value642964266443644064384860485948583459345734563455987
Percentage of SeniorLongTermNotes100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue us-gaap:AwardType

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue

us-gaap:RestrictedStock


Share
Period End2020-12-312019-12-312018-12-312017-12-31
Value17.0824.6359.710
Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue100.0100.0100.00.0

us-gaap:ShortTermBorrowings dei:LegalEntity, us-gaap:CreditFacility, us-gaap:DebtInstrument

us-gaap:ShortTermBorrowings

etrn:EQTMidstreamPartnersLP, us-gaap:RevolvingCreditFacility, etrn:FiveHundredMillionUncommittedRevolvingLoanAgreement


Short
Period End2020-12-312019-12-312018-09-302017-12-312016-12-31
Value3022920.00.00.0
Percentage of ShortTermBorrowings100.0100.00.00.00.0

us-gaap:TaxesPayableCurrentAndNoncurrent

us-gaap:TaxesPayableCurrentAndNoncurrent


Taxes
Period End2020-12-312019-12-31
Value1919
Percentage of TaxesPayableCurrentAndNoncurrent100.0100.0

us-gaap:TemporaryEquityCarryingAmountIncludingPortionAttributableToNoncontrollingInterests

us-gaap:TemporaryEquityCarryingAmountIncludingPortionAttributableToNoncontrollingInterests


Temporary
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-31
Value6816816816816690.00.0
Percentage of TemporaryEquityCarryingAmountIncludingPortionAttributableToNoncontrollingInterests100.0100.0100.0100.0100.00.00.0

us-gaap:TemporaryEquitySharesIssued

us-gaap:TemporaryEquitySharesIssued


Temporary
Period End2021-06-302020-12-312020-06-302019-12-31
Value30018.030018.030018.00
Percentage of TemporaryEquitySharesIssued100.0100.0100.00.0

us-gaap:TemporaryEquitySharesOutstanding

us-gaap:TemporaryEquitySharesOutstanding


Temporary
Period End2021-06-302020-12-312020-10-312020-07-312020-06-302019-12-31
Value0.0300180.03001830300.0300180.0
Percentage of TemporaryEquitySharesOutstanding100.0100.0100.0100.0100.00.0

us-gaap:VariableInterestEntityEntityMaximumLossExposureAmount us-gaap:ConsolidatedEntities, us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName

us-gaap:VariableInterestEntityEntityMaximumLossExposureAmount

us-gaap:VariableInterestEntityNotPrimaryBeneficiary, etrn:MVPJointVenture


Variable
Period End2021-06-302021-03-312020-12-31
Value315130433031
Percentage of VariableInterestEntityEntityMaximumLossExposureAmount100.0100.0100.0

us-gaap:VariableInterestEntityEntityMaximumLossExposureAmount us-gaap:ConsolidatedEntities, us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName, us-gaap:SubsequentEventType

us-gaap:VariableInterestEntityNotPrimaryBeneficiary, etrn:MVPJointVenture, us-gaap:SubsequentEvent


Variable
Period End2021-05-04
Value3125
Percentage of VariableInterestEntityEntityMaximumLossExposureAmount0.0

us-gaap:VariableInterestEntityEntityMaximumLossExposureAmount us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName, us-gaap:StatementScenario, us-gaap:VariableInterestEntitiesByClassificationOfEntity

etrn:MVPJointVenture, srt:ScenarioForecast, us-gaap:VariableInterestEntityNotPrimaryBeneficiary


Variable
Period End2020-11-03
Value2967
Percentage of VariableInterestEntityEntityMaximumLossExposureAmount0.0

us-gaap:VariableInterestEntityEntityMaximumLossExposureAmount us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName, us-gaap:VariableInterestEntitiesByClassificationOfEntity

etrn:MVPJointVenture, us-gaap:VariableInterestEntityNotPrimaryBeneficiary


Variable
Period End2020-09-302019-12-31
Value2829223
Percentage of VariableInterestEntityEntityMaximumLossExposureAmount0.00.0

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:OperatingIncomeLoss
us-gaap:ConsolidationItems, us-gaap:StatementBusinessSegments
('us-gaap:OperatingSegments', None)
Operating Income Lossus-gaap: Consolidation Items, us-gaap: Statement Business Segments
us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax
us-gaap:ConsolidationItems, us-gaap:StatementBusinessSegments
('us-gaap:OperatingSegments', None)
Revenue From Contract With Customer Excluding Assessed Taxus-gaap: Consolidation Items, us-gaap: Statement Business Segments
us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax
us-gaap:ProductOrService, us-gaap:StatementBusinessSegments
('etrn:MinimumVolumeCommitmentContract', None)
Revenue From Contract With Customer Excluding Assessed Taxus-gaap: Product Or Service, us-gaap: Statement Business Segments
us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax
us-gaap:ContractWithCustomerBasisOfPricing
(None,)
Revenue From Contract With Customer Excluding Assessed Taxus-gaap: Contract With Customer Basis Of Pricing
us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax
us-gaap:StatementBusinessSegments
(None,)
Revenue From Contract With Customer Excluding Assessed Taxus-gaap: Statement Business Segments
us-gaap:Assets
us-gaap:ConsolidationItems
(None,)
Assetsus-gaap: Consolidation Items
us-gaap:Assets
us-gaap:ConsolidationItems, us-gaap:StatementBusinessSegments
('us-gaap:OperatingSegments', None)
Assetsus-gaap: Consolidation Items, us-gaap: Statement Business Segments
us-gaap:LongTermDebtNoncurrent
us-gaap:FairValueByMeasurementBasis, us-gaap:LongtermDebtType
(None, 'us-gaap:NotesPayableToBanks')
Long Term Debt Noncurrentus-gaap: Fair Value By Measurement Basis, us-gaap: Longterm Debt Type
us-gaap:StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest
us-gaap:StatementEquityComponents
(None,)
Stockholders Equity Including Portion Attributable To Noncontrolling Interestus-gaap: Statement Equity Components
us-gaap:DepreciationDepletionAndAmortization
us-gaap:ConsolidationItems, us-gaap:StatementBusinessSegments
('us-gaap:OperatingSegments', None)
Depreciation Depletion And Amortizationus-gaap: Consolidation Items, us-gaap: Statement Business Segments
us-gaap:PaymentsToAcquireProductiveAssets
us-gaap:ConsolidationItems, us-gaap:StatementBusinessSegments
('us-gaap:OperatingSegments', None)
Payments To Acquire Productive Assetsus-gaap: Consolidation Items, us-gaap: Statement Business Segments