AWK


Line plots across dimensions of each concept
Tables

Table of contents



us-gaap:CommonStockValue
us-gaap:StatementEquityComponents
us-gaap:SharesOutstanding

us-gaap:CommonStockSharesIssued

us-gaap:CommonStockSharesAuthorized

us-gaap:WeightedAverageNumberOfDilutedSharesOutstanding

us-gaap:WeightedAverageNumberOfSharesOutstandingBasic

us-gaap:EarningsPerShareBasic

us-gaap:EarningsPerShareDiluted

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

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

us-gaap:OperatingIncomeLoss

us-gaap:OtherNonoperatingIncomeExpense

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

us-gaap:NonoperatingIncomeExpense

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

us-gaap:ProfitLoss

us-gaap:ComprehensiveIncomeNetOfTax

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

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

us-gaap:LiabilitiesAndStockholdersEquity

us-gaap:StockholdersEquity
us-gaap:StatementEquityComponents

us-gaap:AssetsCurrent

us-gaap:CashAndCashEquivalentsAtCarryingValue

us-gaap:AccountsReceivableNetCurrent

us-gaap:InventoryRawMaterialsAndSupplies

us-gaap:OtherAssetsCurrent

us-gaap:PropertyPlantAndEquipmentGross

us-gaap:AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment

us-gaap:PropertyPlantAndEquipmentNet

us-gaap:Goodwill

us-gaap:OtherAssetsNoncurrent

us-gaap:LiabilitiesCurrent

us-gaap:AccountsPayableCurrent

us-gaap:TaxesPayableCurrent

us-gaap:OtherLiabilitiesCurrent
us-gaap:FairValueByMeasurementBasis
us-gaap:LongTermDebt

us-gaap:OtherLiabilitiesNoncurrent

us-gaap:StockholdersEquity
us-gaap:StatementEquityComponents

us-gaap:CommonStockValue

us-gaap:RetainedEarningsAccumulatedDeficit

us-gaap:TreasuryStockValue

us-gaap:AccumulatedOtherComprehensiveIncomeLossNetOfTax

us-gaap:NetCashProvidedByUsedInOperatingActivities

us-gaap:NetCashProvidedByUsedInInvestingActivities

us-gaap:NetCashProvidedByUsedInFinancingActivities

us-gaap:NetCashProvidedByUsedInOperatingActivities

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

us-gaap:ProfitLoss

us-gaap:DepreciationDepletionAndAmortization

us-gaap:IncreaseDecreaseInOtherOperatingCapitalNet

us-gaap:NetCashProvidedByUsedInInvestingActivities

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

us-gaap:NetCashProvidedByUsedInFinancingActivities

us-gaap:ProceedsFromIssuanceOfLongTermDebt
us-gaap:ConsolidatedEntities, us-gaap:DebtInstrument, us-gaap:LongtermDebtType
us-gaap:LongtermDebtType, us-gaap:SubsequentEventType, dei:LegalEntity

us-gaap:RepaymentsOfLongTermDebt

us-gaap:PaymentsForRepurchaseOfCommonStock

us-gaap:RepaymentsOfLongTermDebt

us-gaap:EffectiveIncomeTaxRateContinuingOperations

us-gaap:OperatingLeaseRightOfUseAsset

us-gaap:CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents
us-gaap:StatementBusinessSegments
awk:AlternativeRevenuePrograms

awk:BenefitCostsNonOperatingNet

awk:ProceedsFromIssuancesOfEmployeeStockPlansAndDirectStockPurchasePlanNet

awk:ProceedsfromTermLoan

us-gaap:BusinessCombinationConsiderationTransferred1

us-gaap:CapitalExpendituresIncurredButNotYetPaid

us-gaap:CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect

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

us-gaap:GainLossOnDispositionOfAssets1

us-gaap:IncreaseDecreaseInAccountsPayableAndAccruedLiabilities

us-gaap:IncreaseDecreaseInReceivables

us-gaap:InterestIncomeExpenseNonoperatingNet
us-gaap:ConsolidationItems
us-gaap:ConsolidationItems, us-gaap:StatementBusinessSegments
us-gaap:StatementBusinessSegments
us-gaap:LeaseIncome
us-gaap:LitigationCase
us-gaap:LitigationSettlementAmountAwardedToOtherParty

us-gaap:OciBeforeReclassificationsNetOfTaxAttributableToParent
us-gaap:StatementEquityComponents

us-gaap:OtherComprehensiveIncomeLossCashFlowHedgeGainLossBeforeReclassificationAfterTax

us-gaap:OtherComprehensiveIncomeLossCashFlowHedgeGainLossBeforeReclassificationTax

us-gaap:OtherComprehensiveIncomeLossNetOfTax
us-gaap:StatementEquityComponents

us-gaap:OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent
us-gaap:StatementEquityComponents

us-gaap:OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetGainLossNetOfTax

us-gaap:OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetGainLossTax

us-gaap:OtherNoncashIncomeExpense

us-gaap:OtherOperatingIncome
us-gaap:MajorCustomers, us-gaap:ProductOrService, us-gaap:StatementBusinessSegments
us-gaap:ProductOrService
us-gaap:ProductOrService, us-gaap:StatementBusinessSegments
us-gaap:StatementBusinessSegments

us-gaap:PaymentsForProceedsFromRemovalCosts

us-gaap:PaymentsOfDividendsCommonStock

us-gaap:PaymentsRelatedToTaxWithholdingForShareBasedCompensation

us-gaap:PaymentsToAcquireBusinessesNetOfCashAcquired

us-gaap:PensionAndOtherPostretirementBenefitContributions

us-gaap:PensionAndOtherPostretirementBenefitExpense

us-gaap:ProceedsFromAdvancesForConstruction

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

us-gaap:ProceedsFromRepaymentsOfShortTermDebtMaturingInThreeMonthsOrLess

us-gaap:ProceedsFromSaleOfProductiveAssets

us-gaap:ProvisionForDoubtfulAccounts

us-gaap:ReclassificationFromAociCurrentPeriodNetOfTaxAttributableToParent
us-gaap:StatementEquityComponents

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

us-gaap:RepaymentsOfConstructionLoansPayable
us-gaap:DebtInstrument, us-gaap:SubsequentEventType, dei:LegalEntity
us-gaap:RepaymentsOfDebt
us-gaap:DebtInstrumentRedemptionPeriod
us-gaap:LongtermDebtType, us-gaap:SubsequentEventType, dei:LegalEntity
us-gaap:StatementEquityComponents
us-gaap:StockIssuedDuringPeriodSharesShareBasedCompensation

us-gaap:StockIssuedDuringPeriodValueShareBasedCompensation
us-gaap:StatementEquityComponents

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

us-gaap:UtilitiesOperatingExpenseMaintenanceAndOperations

us-gaap:UtilitiesOperatingExpenseTaxes

us-gaap:WeightedAverageNumberDilutedSharesOutstandingAdjustment

awk:AdvancesforConstruction

awk:DeferredTaxLiabilitiesandInvestmentTaxCreditsNoncurrent

awk:DepositAssetsFairValue
us-gaap:FairValueByFairValueHierarchyLevel

awk:IntangibleAssetsNoncurrent

awk:LongTermDebtIncludesRedeemablePreferredStockAtRedemptionValue

awk:MarkToMarketDerivativeLiabilitiesFairValue
us-gaap:FairValueByFairValueHierarchyLevel

awk:OtherInvestmentsFairValueDisclosure
us-gaap:FairValueByFairValueHierarchyLevel
us-gaap:FairValueByMeasurementBasis
awk:PreferredStocksWithMandatoryRedemptionRequirementsCarryingAmount

awk:PrepaidPostRetirementAssetsNoncurrent

awk:RabbiTrustInvestments
us-gaap:FairValueByFairValueHierarchyLevel

awk:RegulatoryandOtherLongtermLiabilities

us-gaap:AccruedLiabilitiesCurrent

us-gaap:AdditionalPaidInCapitalCommonStock

us-gaap:AllowanceForDoubtfulAccountsReceivableCurrent

us-gaap:AssetsFairValueDisclosure
us-gaap:FairValueByFairValueHierarchyLevel

us-gaap:AssetsOfDisposalGroupIncludingDiscontinuedOperation

us-gaap:CapitalizationLongtermDebtAndEquity

us-gaap:ContractWithCustomerAssetNet

us-gaap:ContractWithCustomerLiability

us-gaap:ContributionsInAidOfConstruction
us-gaap:CreditFacility, dei:LegalEntity
us-gaap:DebtInstrumentFaceAmount
us-gaap:DebtInstrument, us-gaap:LongtermDebtType, us-gaap:SubsequentEventType, dei:LegalEntity
us-gaap:LongtermDebtType, us-gaap:SubsequentEventType, dei:LegalEntity
dei:LegalEntity
us-gaap:DebtWeightedAverageInterestRate

us-gaap:DefinedBenefitPensionPlanLiabilitiesNoncurrent
us-gaap:BalanceSheetLocation, us-gaap:DerivativeInstrumentsGainLossByHedgingRelationship, us-gaap:FinancialInstrument
us-gaap:DerivativeLiabilities

us-gaap:FairValueLiabilitiesMeasuredOnRecurringBasisObligations
us-gaap:FairValueByFairValueHierarchyLevel

us-gaap:FairValueNetAssetLiability
us-gaap:FairValueByFairValueHierarchyLevel

us-gaap:InterestPayableCurrent

us-gaap:LiabilitiesFairValueDisclosure
us-gaap:FairValueByFairValueHierarchyLevel

us-gaap:LiabilitiesOfDisposalGroupIncludingDiscontinuedOperation

us-gaap:LongTermDebtAndCapitalLeaseObligations

us-gaap:LongTermDebtAndCapitalLeaseObligationsCurrent
us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FairValueByMeasurementBasis
us-gaap:LongTermDebtFairValue
us-gaap:FairValueByMeasurementBasis

us-gaap:LossContingencyAccrualAtCarryingValue
us-gaap:LitigationCase
us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FairValueByMeasurementBasis
us-gaap:MandatorilyRedeemablePreferredStockFairValueDisclosure
us-gaap:FairValueByMeasurementBasis

us-gaap:OperatingLeaseLiabilityNoncurrent

us-gaap:PreferredStockRedemptionAmount

us-gaap:RegulatedEntityOtherAssetsNoncurrent

us-gaap:RegulatoryAssetsNoncurrent

us-gaap:RegulatoryLiabilityNoncurrent

us-gaap:RestrictedCashAndCashEquivalents
us-gaap:FairValueByFairValueHierarchyLevel

us-gaap:RestrictedCashAndCashEquivalentsAtCarryingValue

us-gaap:RestrictedCashAndCashEquivalentsNoncurrent
us-gaap:MajorCustomers, us-gaap:StatementBusinessSegments
us-gaap:RevenueRemainingPerformanceObligation

us-gaap:ShortTermBorrowings
dei:LegalEntity

us-gaap:TreasuryStockShares

us-gaap:UnbilledReceivablesCurrent

Tables

  2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
us-gaap:CommonStockValue █████████▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁2222222221111111111111111111NANANA
 us-gaap:SharesOutstanding us-gaap:StatementEquityComponents us-gaap:CommonStock█▇▇▇▇▇▇▇▆▄▄▄▄▄▃▃▃▃▃▂▂▂▂▂▂▂▂▁▁▁186185185185185185185185182180179179179179178178178177177176176176176175175175175174174174NA
us-gaap:CommonStockSharesIssued █▆▆▆▆▆▆▆▁186185185185185185185185182NANA179NANANANANANANANANANANANANANANANANANANA
us-gaap:CommonStockSharesAuthorized ██████████████████████▁█████5005005005005005005005005005005005005005005005005005005005005005000500500500500500NANANA
us-gaap:WeightedAverageNumberOfDilutedSharesOutstanding 181NA181181181NA181179179180180NA179179179NA179178178NA177177177NA176176176NA175174174
us-gaap:WeightedAverageNumberOfSharesOutstandingBasic 181NA181181181NA181179178179179NA178178178NA177177177NA176176175NA175175175NA174174174
us-gaap:EarningsPerShareBasic ▄▃█▆▄▄▆▅▄▄▃▃▅▄▂▂▅▃▂▂▅▄▁▂▅▃▂▁▄▂▁0.690.541.330.940.620.621.040.90.60.690.450.520.850.610.380.330.850.570.320.310.870.610.240.370.780.480.270.230.710.420.18
us-gaap:EarningsPerShareDiluted ▄▃█▆▄▄▆▅▃▄▃▃▅▄▂▂▅▃▂▂▅▄▁▂▅▃▂▁▄▂▁0.680.541.330.940.620.621.040.910.590.680.440.520.850.610.380.330.840.570.320.310.860.610.240.370.780.480.270.230.710.420.18
  2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
us-gaap:RevenueFromContractWithCustomerIncludingAssessedTax ▅▆█▆▅▆▇▅▄▄▃▄▅▄▃▃▅▃▂▃▅▄▂▂▄▃▂▂▄▂▁8349081013863804865955840756782698731846759681712829724636680831745618639766674610625748634566
 us-gaap:RevenueFromContractWithCustomerIncludingAssessedTax us-gaap:MajorCustomers,us-gaap:ProductOrService,us-gaap:StatementBusinessSegments awk:Commercial,awk:WaterServices,awk:RegulatedBusiness142NA188153136NA180152133NANANANANANANANANANANANANANANANANANANANANANA
 us-gaap:RevenueFromContractWithCustomerIncludingAssessedTax us-gaap:MajorCustomers,us-gaap:ProductOrService,us-gaap:StatementBusinessSegments awk:Residential,awk:WaterServices,awk:RegulatedBusiness399NA503415378NA475410368NANANANANANANANANANANANANANANANANANANANANANA
 us-gaap:RevenueFromContractWithCustomerIncludingAssessedTax us-gaap:ProductOrService,us-gaap:StatementBusinessSegments awk:WaterServices,awk:RegulatedBusiness659NA830688625NA781681612NANANANANANANANANANANANANANANANANANANANANANA
 us-gaap:RevenueFromContractWithCustomerIncludingAssessedTax us-gaap:StatementBusinessSegments awk:MarketBasedBusinesses128NA136132134NA125114100NANANANANANANANANANANANANANANANANANANANANANA
 us-gaap:RevenueFromContractWithCustomerIncludingAssessedTax us-gaap:StatementBusinessSegments awk:RegulatedBusiness710NA882736675NA835731661NANANANANANANANANANANANANANANANANANANANANANA
us-gaap:OperatingExpenses ▆█▆▅▅▆▇▄▄▂▂▃▃▂▂▂▂▂▁▃▂▂▁605678607580575602641551544504493508508505495496505482471513504474458NA485473466NA482446442
 us-gaap:OperatingExpenses us-gaap:ConsolidationItems,us-gaap:StatementBusinessSegments us-gaap:OperatingSegments,awk:MarketBasedBusinesses▃█▄▄▄▅▆▃▂▂▁9915810810610811813998868376NA79NANANANANANANANANANANANANANANANANANA
 us-gaap:OperatingExpenses us-gaap:ConsolidationItems,us-gaap:StatementBusinessSegments us-gaap:OperatingSegments,awk:RegulatedBusiness███▆▅▇█▃▄▁▁503509505480470492505453462428424NA434435431NANANANANANANANANANANANANANANANA
us-gaap:OperatingIncomeLoss ▄▃█▅▄▄▆▅▃▅▃▃▆▄▃▃▆▄▂▂▆▅▂▂▅▃▁▂▅▃▁239224406302238248335302217277204223337253186215323241164166327270159177281201144149266188124
us-gaap:OtherNonoperatingIncomeExpense ▃▆▄█▃▄▄▃▃▁▂▂▂▂▁▁▂▂▂▂▂▂▂31051535644-11000-1-20000000NA00-1NA010
us-gaap:IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest ▂▁█▅▂▂▆▄▁▄▁▂▆▃159136318227152170255222140203133149263182NANANANANANANANANANANANANANANANANA
 us-gaap:IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest us-gaap:ConsolidationItems,us-gaap:StatementBusinessSegments us-gaap:OperatingSegments,awk:MarketBasedBusinesses█▁███▇▂▆▆▆▅30-2030292721-1418161812NA17NANANANANANANANANANANANANANANANANANA
 us-gaap:IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest us-gaap:ConsolidationItems,us-gaap:StatementBusinessSegments us-gaap:OperatingSegments,awk:RegulatedBusiness▂▄█▄▂▂▇▅▁▄▁162198313208150170288226142199134NA258NANANANANANANANANANANANANANANANANANA
us-gaap:NonoperatingIncomeExpense ▆▅▅▇▆▇▆▆▇██████▁▇▇▇███▇-80-88-88-75-86-78-80-80-77-73-70-73-73-72-73-115-74-74-75-72-72-73-75NA-74-75-74NA-71-73-76
us-gaap:IncomeTaxExpenseBenefit ▁▂▅▃▂▃▅▄▁▆▃▃█▅▂▂▇▄▁▂▇▆▁353878573958706034805355107724440986631401008035NA785128NA754618
 us-gaap:IncomeTaxExpenseBenefit us-gaap:ConsolidationItems,us-gaap:StatementBusinessSegments us-gaap:OperatingSegments,awk:MarketBasedBusinesses█▃▇█▇▇▁▆▆▇▆8-27877-55465NANANANANANANANANANANANANANANANANANANANA
 us-gaap:IncomeTaxExpenseBenefit us-gaap:ConsolidationItems,us-gaap:StatementBusinessSegments us-gaap:OperatingSegments,awk:RegulatedBusiness▁▂█▄▁▃█▅▁█▄4046775240517659387753NANANANANANANANANANANANANANANANANANANANA
us-gaap:ProfitLoss ▃▂█▅▂▂▆▅▂▃▁▂▄124982401701131121851621061238093152NANANANANANANANANANANANANANANANANANA
us-gaap:ComprehensiveIncomeNetOfTax ▄▄█▆▃▅▇▆▄▄▃▂▅▄▂▄▅▃▂▁▅▄▁119108241170100138196168110124804715010967134153103593015610843NA1378548NA1257332
us-gaap:NetIncomeLoss ▄▃█▆▄▄▆▅▄▄▃▃▅▄▂▂▅▃▂▂▅▄▁▂▅▃▂▁▄▂▁1249824017011311218716210612380931521096859150101575515310741641378447401247230
 us-gaap:NetIncomeLoss us-gaap:ConsolidationItems,us-gaap:StatementBusinessSegments us-gaap:OperatingSegments,awk:MarketBasedBusinesses█▁██▇▆▃▆▆▆▅22-1823212014-71312127NANANANANANANANANANANANANANANANANANANANA
 us-gaap:NetIncomeLoss us-gaap:ConsolidationItems,us-gaap:StatementBusinessSegments us-gaap:OperatingSegments,awk:RegulatedBusiness▃▄█▄▂▃▇▅▂▃▁12315223615611011821316710412281NANANANANANANANANANANANANANANANANANANANA
 us-gaap:NetIncomeLoss us-gaap:StatementEquityComponents us-gaap:RetainedEarnings124NA240170113112187162106123809315210968591501015755153NA41NANANA47NANANA30
  2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
us-gaap:Assets █▇▇▇▇▆▆▆▅▃▃▃▂▂▂▂▂▂▂▂▂▁▁▂▂▁▁▁▁▁235462268222238218542146421223208802047119728167321626316130157151542615274150691522814977147691471814599144121408714776145381434714128140791398313773NA
 us-gaap:Assets us-gaap:ConsolidationItems,us-gaap:StatementBusinessSegments us-gaap:OperatingSegments,awk:RegulatedBusiness██▇▇▆▆▆▅▅▁▁2057520318197871933818937186801841518197178171477714431NA1416113857NANANANANANANANANANANANANANANANANA
us-gaap:LiabilitiesAndStockholdersEquity █▇▇▇▆▆▆▆▅▃▃▃▂▂▂▂▂▂▂▁▁▁▁▂▁▁▁▁23546226822223821854214642122320880204711972816732162631613015715154261527415069152281497714769147181459914412140871477614538143471412814079NANANA
us-gaap:StockholdersEquity █▇█▇▆▆▆▅▄▂▁▁624361216190602759325864586057365451505449934915NANANA4727463245724507444344474321425042354258415741504132NANA4003
 us-gaap:StockholdersEquity us-gaap:StatementEquityComponents us-gaap:AdditionalPaidInCapital███▇▇▇▇▇▃▁▁▁671367006695668366686657664766376438632463146302NANANA6262NANANA6223NANANANANANA61646156NANA6142
  2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
us-gaap:AssetsCurrent █▅▃▂▂▃▃▃▂▃▂▂▂▂▂▁▂▁▁▁▂▂▂▆▆▆▅▁180112857997416917818008337298907296617567076875506135454914996426065891397147914931305534NANANA
us-gaap:CashAndCashEquivalentsAtCarryingValue █▂▂▂▂▃▂▂▂▃▁▁▂▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁5566094646313086685514424237432302632202124181291415131313232012
us-gaap:AccountsReceivableNetCurrent ▃▃▇▇▄▄█▆▁292294335337307301347324273NANA232NANANANANANANANANANANANANANANANANANANA
us-gaap:InventoryRawMaterialsAndSupplies █▆▇▇▆▅▅▅▅▄▄▄▄▄▃▂▃▃▂▁▂▂▂▁▂▂▂▁50444648444142424238383737363532353331293131302830313028NANANA
us-gaap:OtherAssetsCurrent ▆▆▆▄▄▅▄█▇▂▃▂▁▁▁▁▂▁▂▁▄▃▃▂▃▃▃▂1191181159185959316014541634528273128383141308057625471746148NANANA
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us-gaap:PropertyPlantAndEquipmentGross █▇▆▅▅▅▃▂▁243512394123807233552347623204227342236121995NANA17269NANANANANANANANANANANANANANANANANANANA
us-gaap:AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment █████████▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁576357095656555758535795567155845518247239248239243233228223215207199189180173164161161153143NANANA
us-gaap:PropertyPlantAndEquipmentNet ███▇▇▇▇▆▆▃▃▃▃▃▃▃▂▂▂▂▂▂▂▁▁▁▁▂18588182321815117798176231740917063167771647713357130981302912799125821246912391121121192711792117391153411387111391102110787105991055511201NANANA
us-gaap:Goodwill ▆▆▇▇▇▇▇█▄▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▂▁▁149915011576157515751575157116211379120912081208120812081208120712071207120712071207120711951195119511951204125011951195NA
us-gaap:OtherAssetsNoncurrent ████▁▂▂▂▂▂▂▂▁▁▁▁▁▁▂▂▁▁▁▁▁▁▁▁203207201202576376708170676959606060615962635959565758515150NANANA
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us-gaap:LiabilitiesCurrent ▇▅▃▃▅▅▄█▇▃▃▃▂▃▂▃▂▂▂▂▂▂▁▃▃▃▂▁276720451488131721562094174829512539151212271240105812341197123511411049958994100510177431489138013271134774NANANA
us-gaap:AccountsPayableCurrent ▂▄▂▁▁▃▁▁▁█▄█▇▄▃▇▅▃▃█▄▃▂▆▄▂▁▄152203149140130175141139133283203285260192183264209178166279202183162243190159132199NANANA
us-gaap:TaxesPayableCurrent ▆▄█▆▆▄▇▄▆▃▅▁▄▃▅▂▄▃▄▂▃▃▆▃▄▄▆▄64467861644567486441552446375432463751354339593647476546NANANA
us-gaap:OtherLiabilitiesCurrent ▁▂▂▂▃▂▂▁▁▄▅█▅▄▃▄▅▃▂▄▇▄▃▃▄▃▁▂164174172177204196169152159248267363282231212241281198189239321255208223232222166193NANANA
  2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
 us-gaap:LongTermDebt us-gaap:FairValueByMeasurementBasis us-gaap:CarryingReportedAmountFairValueDisclosure████▄▄▅▁▁866786648666866676287638783167066814NANANANANANANANANANANANANANANANANANANANANANA
us-gaap:OtherLiabilitiesNoncurrent ▄▅▅▅▄▅▅▅▄▂▁▁▁▁▁▁▁▁▇█▁▁▁▁▁▁▂▂757876767578788474483637363737383640981143938403836394245NANANA
  2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
us-gaap:StockholdersEquity █▇█▇▆▆▆▅▄▂▁▁624361216190602759325864586057365451505449934915NANANA4727463245724507444344474321425042354258415741504132NANA4003
 us-gaap:StockholdersEquity us-gaap:StatementEquityComponents us-gaap:AdditionalPaidInCapital███▇▇▇▇▇▃▁▁▁671367006695668366686657664766376438632463146302NANANA6262NANANA6223NANANANANANA61646156NANA6142
us-gaap:CommonStockValue █████████▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁2222222221111111111111111111NANANA
us-gaap:RetainedEarningsAccumulatedDeficit ███▇▇▇▇▆▆▄▄▃▃▃▃▃▃▃▂▂▂▂▁▁▁▁▁▁-83-207-123-273-353-464-432-537-617-1162-1224-1295-1333-1374-1427-1495-1505-1555-1607-1664-1675-1785-1847-1848-1848-1945-1950-1959NANANA
us-gaap:TreasuryStockValue █████▇▇▇▇▂▁▁▁▁▁▁▁▁▁▁34833833833833829729729729730161010101055550NANANA00000NANANA
us-gaap:AccumulatedOtherComprehensiveIncomeLossNetOfTax ▇█▇▇▇█▆▅▄▄▄▄████▂▁▁▁▃▃▃▃▅▅▅▅-41-36-46-47-47-34-60-69-75-80-81-81-35-34-35-34-109-112-114-116-91-93-95-97-68-68-69-71NANANA
  2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
us-gaap:NetCashProvidedByUsedInOperatingActivities ▂▇█▅▂▆█▅▃▃▂▄▆▂▃▂▇▁▁▃▇180438465312168394467306219219198257389205244207398140149220418NA148NANANA161NANANA175
us-gaap:NetCashProvidedByUsedInInvestingActivities ▅▂▅▅▆▄▆▁▆▆▇▇▇██▆▇████-450-691-437-466-351-491-396-763-386-320-246-292-283-232-205-333-259-231-227-197-215NA229NANANA-166NANANA-137
us-gaap:NetCashProvidedByUsedInFinancingActivities █▄▂▄▃▃▂▆▄▄▃▂▂▃▂▃▂▃▃▂▁7682281155110140-5247216622149-15-6428-35120-1269074-17-197NA-382NANANA5NANANA-47
  2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
us-gaap:NetCashProvidedByUsedInOperatingActivities ▂▇█▅▂▆█▅▃▃▂▄▆▂▃▂▇▁▁▃▇180438465312168394467306219219198257389205244207398140149220418NA148NANANA161NANANA175
us-gaap:NetIncomeLoss ▄▃█▆▄▄▆▅▄▄▃▃▅▄▂▂▅▃▂▂▅▄▁▂▅▃▂▁▄▂▁1249824017011311218716210612380931521096859150101575515310741641378447401247230
 us-gaap:NetIncomeLoss us-gaap:ConsolidationItems,us-gaap:StatementBusinessSegments us-gaap:OperatingSegments,awk:MarketBasedBusinesses█▁██▇▆▃▆▆▆▅22-1823212014-71312127NANANANANANANANANANANANANANANANANANANANA
 us-gaap:NetIncomeLoss us-gaap:ConsolidationItems,us-gaap:StatementBusinessSegments us-gaap:OperatingSegments,awk:RegulatedBusiness▃▄█▄▂▃▇▅▂▃▁12315223615611011821316710412281NANANANANANANANANANANANANANANANANANANANA
 us-gaap:NetIncomeLoss us-gaap:StatementEquityComponents us-gaap:RetainedEarnings124NA240170113112187162106123809315210968591501015755153NA41NANANA47NANANA30
us-gaap:ProfitLoss ▃▂█▅▂▂▆▅▂▃▁▂▄124982401701131121851621061238093152NANANANANANANANANANANANANANANANANANA
us-gaap:DepreciationDepletionAndAmortization ▇█▇▇▇▇▇▆▅▃▃▃▃▃▃▂▂▂▂▂▁▁▁14515214414214414114113412910810710510610510610310210199100969292NA888788NA848182
us-gaap:IncreaseDecreaseInOtherOperatingCapitalNet 9NA82413NA-4922-5-612NANANANANANANANANANANANANANANANANANANANA
  2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
us-gaap:NetCashProvidedByUsedInInvestingActivities ▅▂▅▅▆▄▆▁▆▆▇▇▇██▆▇████-450-691-437-466-351-491-396-763-386-320-246-292-283-232-205-333-259-231-227-197-215NA229NANANA-166NANANA-137
us-gaap:PaymentsToAcquirePropertyPlantAndEquipment ▄█▄▃▁▅▃▃▂408539403386326450397375364NANANANA209192314235216213248204242233NA230215176NA194184142
 us-gaap:PaymentsToAcquirePropertyPlantAndEquipment us-gaap:ConsolidationItems,us-gaap:StatementBusinessSegments us-gaap:OperatingSegments,awk:RegulatedBusiness▄█▄▃▁▅▃▂▁404535399378315427373347330NANANANANANANANANANANANANANANANANANANANANANA
  2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
us-gaap:NetCashProvidedByUsedInFinancingActivities █▄▂▄▃▃▂▆▄▄▃▂▂▃▂▃▂▃▃▂▁7682281155110140-5247216622149-15-6428-35120-1269074-17-197NA-382NANANA5NANANA-47
us-gaap:ProceedsFromIssuanceOfLongTermDebt ▁▃▁▇▁▁█▁▁833971182231340510NANA0500004011013000NA14NANANA0NANANA1
 us-gaap:ProceedsFromIssuanceOfLongTermDebt us-gaap:ConsolidatedEntities,us-gaap:DebtInstrument,us-gaap:LongtermDebtType srt:Subsidiaries,awk:FixedRate,awk:PrivateActivityBondsAndGovernmentFundedDebt8NA11NANANANANANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:RepaymentsOfLongTermDebt ▁▆▁▃▁▄▄▃▁▁▁▂▃▁▁█▁▁▁▄▂634271341219621111362310113312479732210103NA6NANANA62NANANA38
us-gaap:PaymentsForRepurchaseOfCommonStock ▁▁▁▁▇▁▁▁█▃0000360004513NANANANANANANANANANANANANANANANANANANANANA
  2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
us-gaap:RepaymentsOfLongTermDebt ▁▆▁▃▁▄▄▃▁▁▁▂▃▁▁█▁▁▁▄▂634271341219621111362310113312479732210103NA6NANANA62NANANA38

Common Stock Value

us-gaap:CommonStockValue



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312009-12-31
Value222222222222222222111111111111111111111
Percentage of CommonStockValue100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

Common Stock Par Or Stated Value Per Share

Shares Outstanding

us-gaap:StatementEquityComponents

us-gaap:SharesOutstanding

us-gaap:CommonStock



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302009-12-312008-12-31
Value186185185185185185185185182182182182182181181181181180180180179179179179178178178177177176176176176175175175175174174174174160
Percentage of SharesOutstanding100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:TreasuryStock



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302009-12-312008-12-31
Value-5-5-5-5-5-4-4-4-4-4-4-4-4-3-3-3-3-2-100000000000000000000000
Percentage of SharesOutstanding-2.8-2.7-2.7-2.7-2.7-2.5-2.5-2.5-2.6-2.2-2.2-2.2-2.5-2.0-2.0-2.0-2.0-1.4-0.6-0.3-0.2-0.1-0.1-0.1-0.1-0.1-0.1-0.1-0.10.00.00.00.00.00.00.00.0-0.00.00.00.00.0

Common Stock Shares Issued

us-gaap:CommonStockSharesIssued



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302015-12-312015-09-302014-12-31
Value186185185185185185185185182182182182182181181180180179
Percentage of CommonStockSharesIssued100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Common Stock Shares Outstanding

Common Stock Shares Authorized

us-gaap:CommonStockSharesAuthorized



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312009-12-31
Value5005005005005005005005005005005005005005005005005005005005005005005005005005005005005005005005000500500500500500500
Percentage of CommonStockSharesAuthorized100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Weighted Average Number Of Diluted Shares Outstanding

us-gaap:WeightedAverageNumberOfDilutedSharesOutstanding



Period End2020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-312017-09-302017-06-302017-03-312016-09-302016-06-302016-03-312015-09-302015-06-302015-03-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-312012-09-302012-06-302012-03-312011-09-302011-06-302011-03-312010-09-302010-06-302010-03-31
Value181181181181181179179179179179178178179180180180179179179179178178177177177176176176175174174
Percentage of WeightedAverageNumberOfDilutedSharesOutstanding100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Weighted Average Number Of Shares Outstanding Basic

us-gaap:WeightedAverageNumberOfSharesOutstandingBasic



Period End2020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-312017-09-302017-06-302017-03-312016-09-302016-06-302016-03-312015-09-302015-06-302015-03-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-312012-09-302012-06-302012-03-312011-09-302011-06-302011-03-312010-09-302010-06-302010-03-31
Value181181181181181179178178178178178178178179179179178178178177177177176176175175175175174174174
Percentage of WeightedAverageNumberOfSharesOutstandingBasic100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Earnings Per Share Basic

us-gaap:EarningsPerShareBasic



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value0.690.541.330.940.620.621.040.90.6-0.011.140.740.520.570.830.770.460.550.970.690.450.520.850.610.380.330.850.570.320.310.870.610.240.370.780.480.270.230.710.420.18
Percentage of EarningsPerShareBasic100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Earnings Per Share Diluted

us-gaap:EarningsPerShareDiluted



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value0.680.541.330.940.620.621.040.910.590.01.130.730.520.570.830.770.460.550.960.680.440.520.850.610.380.330.840.570.320.310.860.610.240.370.780.480.270.230.710.420.18
Percentage of EarningsPerShareDiluted100.0100.0100.0100.0100.0100.0100.0100.0100.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Income Loss From Continuing Operations Per Basic Share

Income Loss From Continuing Operations Per Diluted Share

Revenue From Contract With Customer Excluding Assessed Tax

Revenue From Contract With Customer Including Assessed Tax

us-gaap:RevenueFromContractWithCustomerIncludingAssessedTax



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value8349081013863804865955840756782698731846759681712829724636680831745618639766674610625748634566
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax0.00.00.00.00.00.00.00.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

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

awk:Commercial, awk:WastewaterServices, awk:RegulatedBusiness



Period End2020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-31
Value8977877
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax1.00.90.80.90.80.80.9
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax0.00.00.00.00.00.00.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax awk:Commercial awk:WastewaterServices awk:RegulatedBusiness0.00.00.00.00.00.00.0

awk:Commercial, awk:WaterServices, awk:RegulatedBusiness



Period End2020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-31
Value142188153136180152133
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax17.018.617.716.918.818.117.6
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax0.00.00.00.00.00.00.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax awk:Commercial awk:WaterServices awk:RegulatedBusiness0.00.00.00.00.00.00.0

awk:FireService, awk:WaterServices, awk:RegulatedBusiness



Period End2020-03-312019-09-302019-06-302019-03-31
Value37373534
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax4.43.74.14.2
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax0.00.00.00.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax awk:FireService awk:WaterServices awk:RegulatedBusiness0.00.00.00.0

awk:Industrial, awk:WastewaterServices, awk:RegulatedBusiness



Period End2020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-31
Value1101301
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax0.10.10.00.10.30.00.1
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax0.00.00.00.00.00.00.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax awk:Industrial awk:WastewaterServices awk:RegulatedBusiness0.00.00.00.00.00.00.0

awk:Industrial, awk:WaterServices, awk:RegulatedBusiness



Period End2020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-31
Value32383432403431
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax3.83.83.94.04.24.04.1
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax0.00.00.00.00.00.00.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax awk:Industrial awk:WaterServices awk:RegulatedBusiness0.00.00.00.00.00.00.0

awk:PublicandOther, awk:WastewaterServices, awk:RegulatedBusiness



Period End2020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-31
Value3253143
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax0.40.20.60.40.10.50.4
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax0.00.00.00.00.00.00.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax awk:PublicandOther awk:WastewaterServices awk:RegulatedBusiness0.00.00.00.00.00.00.0

awk:PublicandOther, awk:WaterServices, awk:RegulatedBusiness



Period End2020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-31
Value49645145868580
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax5.96.35.95.69.010.110.6
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax0.00.00.00.00.00.00.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax awk:PublicandOther awk:WaterServices awk:RegulatedBusiness0.00.00.00.00.00.00.0

awk:Residential, awk:WastewaterServices, awk:RegulatedBusiness



Period End2020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-31
Value31312829292727
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax3.73.13.23.63.03.23.6
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax0.00.00.00.00.00.00.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax awk:Residential awk:WastewaterServices awk:RegulatedBusiness0.00.00.00.00.00.00.0

awk:Residential, awk:WaterServices, awk:RegulatedBusiness



Period End2020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-31
Value399503415378475410368
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax47.849.748.147.049.748.848.7
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax0.00.00.00.00.00.00.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax awk:Residential awk:WaterServices awk:RegulatedBusiness0.00.00.00.00.00.00.0

us-gaap:ProductOrService

us-gaap:ServiceOther



Period End2020-03-312019-09-302019-06-302019-03-312018-09-30
Value-4-5-5-5-5
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax-0.5-0.5-0.6-0.6-0.5
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax0.00.00.00.00.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:ServiceOther0.00.00.00.00.0

us-gaap:ProductOrService, us-gaap:StatementBusinessSegments

awk:MiscellaneousUtilityCharge, awk:RegulatedBusiness



Period End2020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-31
Value89810131211
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax1.00.90.91.21.41.41.5
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax0.00.00.00.00.00.00.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax awk:MiscellaneousUtilityCharge awk:RegulatedBusiness0.00.00.00.00.00.00.0

awk:WastewaterServices, awk:RegulatedBusiness



Period End2020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-31
Value43434040413838
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax5.24.24.65.04.34.55.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax0.00.00.00.00.00.00.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax awk:WastewaterServices awk:RegulatedBusiness0.00.00.00.00.00.00.0

awk:WaterServices, awk:RegulatedBusiness



Period End2020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-31
Value659830688625781681612
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax79.081.979.777.781.881.181.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax0.00.00.00.00.00.00.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax awk:WaterServices awk:RegulatedBusiness0.00.00.00.00.00.00.0

us-gaap:StatementBusinessSegments

awk:MarketBasedBusinesses



Period End2020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-31
Value128136132134125114100
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax15.313.415.316.713.113.613.2
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax0.00.00.00.00.00.00.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax awk:MarketBasedBusinesses0.00.00.00.00.00.00.0

awk:RegulatedBusiness



Period End2020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-31
Value710882736675835731661
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax85.187.185.384.087.487.087.4
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax0.00.00.00.00.00.00.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax awk:RegulatedBusiness0.00.00.00.00.00.00.0

Revenues

Operating Expenses

us-gaap:OperatingExpenses



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-09-302011-06-302011-03-312010-09-302010-06-302010-03-31
Value605678607580575602641551544542506536529554611528529550534504493508508505495496505482471513504474458485473466482446442
Percentage of OperatingExpenses100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.064.570.769.560.166.672.769.760.966.674.275.560.663.774.263.370.276.364.470.378.0

us-gaap:ConsolidationItems

us-gaap:CorporateNonSegment



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-30
Value311-6-6-3-8-30-4-9-7-6-6-4-8-4-50-4-6-6-2-5-3-4-5-6-4-5-3-6
Percentage of OperatingExpenses0.51.6-1.0-1.0-0.5-1.3-0.50.0-0.7-1.7-1.4-1.1-1.1-0.7-1.3-0.8-0.9-0.0-0.9-1.3-1.4-0.5-1.2-0.6-1.0-1.0-1.2-0.9-1.3-0.6-1.4
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0-0.8-1.0-0.3-0.7-0.4-0.7-0.7-0.7-0.6-0.9-0.4-0.8
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:CorporateNonSegment0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:ConsolidationItems, us-gaap:StatementBusinessSegments

us-gaap:OperatingSegments, awk:MarketBasedBusinesses



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-09-30
Value99158108106108118139988697808994919898104109101837679
Percentage of OperatingExpenses16.423.317.818.318.819.621.717.815.817.915.816.617.816.416.018.619.719.919.016.415.415.7
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.010.610.99.4
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:OperatingSegments awk:MarketBasedBusinesses0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:OperatingSegments, awk:RegulatedBusiness



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-09-302014-06-302014-03-31
Value503509505480470492505453462454433453441467521434430441437428424434435431
Percentage of OperatingExpenses83.175.183.282.881.781.778.882.284.983.885.684.583.484.385.382.281.380.281.984.986.085.586.287.1
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.054.760.851.457.463.3
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:OperatingSegments awk:RegulatedBusiness0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

Operating Income Loss

us-gaap:OperatingIncomeLoss



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value239224406302238248335302217279430308227248319299214232361277204223337253186215323241164166327270159177281201144149266188124
Percentage of OperatingIncomeLoss100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.035.529.330.539.933.427.330.339.133.425.824.539.436.325.827.736.729.823.723.935.629.722.0

Interest Expense

Other Nonoperating Income Expense

us-gaap:OtherNonoperatingIncomeExpense



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-09-302011-06-302011-03-312010-09-302010-06-302010-03-31
Value3105153564465331572140-11000-1-2000000000-1010
Percentage of OtherNonoperatingIncomeExpense100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0-0.10.3-0.1-0.1-0.0-0.2-0.4-0.1-0.0-0.1-0.10.00.0-0.10.00.1-0.20.10.30.0

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

Income Loss From Continuing Operations

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

us-gaap:IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-30
Value159136318227152170255222140201340226145166243225136157287203133149263182
Percentage of IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.026.019.120.431.224.0

us-gaap:ConsolidationItems

us-gaap:CorporateNonSegment



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-30
Value-33-42-25-10-25-21-19-22-18-13-28-19-19-20-15-18-17-19-17-13-13-16-12
Percentage of IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest-20.8-30.9-7.9-4.4-16.4-12.4-7.5-9.9-12.9-6.5-8.2-8.4-13.1-12.0-6.2-8.0-12.5-12.2-6.0-6.4-9.8-10.8-4.7
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0-1.7-1.9-2.2-1.5
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:CorporateNonSegment0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:ConsolidationItems, us-gaap:StatementBusinessSegments

us-gaap:OperatingSegments, awk:MarketBasedBusinesses



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-09-30
Value30-2030292721-14181620211510211222101720181217
Percentage of IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest18.9-14.79.412.817.812.4-5.58.111.410.06.26.66.912.74.99.87.411.17.28.89.06.7
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.02.31.72.1
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:OperatingSegments awk:MarketBasedBusinesses0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:OperatingSegments, awk:RegulatedBusiness



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-09-30
Value162198313208150170288226142194347230154165246221143159283199134258
Percentage of IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest101.9145.698.491.698.7100.0112.9101.8101.496.5102.1101.8106.299.4101.298.2105.1101.198.897.7100.898.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.025.419.230.6
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:OperatingSegments awk:RegulatedBusiness0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

Income Loss From Continuing Operations Including Portion Attributable To Noncontrolling Interest

Nonoperating Income Expense

us-gaap:NonoperatingIncomeExpense



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-09-302011-06-302011-03-312010-09-302010-06-302010-03-31
Value-80-88-88-75-86-78-80-80-77-78-90-82-82-82-76-74-78-74-74-73-70-73-73-72-73-115-74-74-75-72-72-73-75-74-75-74-71-73-76
Percentage of NonoperatingIncomeExpense100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0-9.5-10.1-10.1-8.7-9.5-10.7-16.3-9.0-10.2-11.9-10.7-8.7-9.8-12.1-9.7-11.2-12.2-9.5-11.6-13.5

Income Tax Expense Benefit

us-gaap:IncomeTaxExpenseBenefit



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-09-302011-06-302011-03-312010-09-302010-06-302010-03-31
Value35387857395870603420213795526595885458113805355107724440986631401008035785128754618
Percentage of IncomeTaxExpenseBenefit100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.010.37.77.512.79.56.65.711.99.24.95.912.110.85.710.27.64.710.17.33.3

us-gaap:ConsolidationItems

us-gaap:CorporateNonSegment



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-31
Value-13-6-6-3-80-1-4-8110-5-2-11-10-4-7-6-12-4-2-5
Percentage of IncomeTaxExpenseBenefit-37.1-15.8-7.7-5.3-20.50.0-1.4-6.7-23.554.5-3.6-2.1-21.2-15.4-4.2-8.0-11.1-20.4-3.5-2.5-9.4
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0-0.3-0.7
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:CorporateNonSegment0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:ConsolidationItems, us-gaap:StatementBusinessSegments

us-gaap:OperatingSegments, awk:MarketBasedBusinesses



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-31
Value8-27877-5541177385947865
Percentage of IncomeTaxExpenseBenefit22.9-5.39.014.017.912.1-7.18.311.85.45.17.45.812.35.310.27.411.97.17.49.4
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.80.7
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:OperatingSegments awk:MarketBasedBusinesses0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:OperatingSegments, awk:RegulatedBusiness



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-31
Value40467752405176593881135906067948656641097753
Percentage of IncomeTaxExpenseBenefit114.3121.198.791.2102.687.9108.698.3111.840.198.594.7115.4103.198.997.7103.7108.896.395.699.1
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.09.87.6
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:OperatingSegments awk:RegulatedBusiness0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

Income Taxes Paid Net

Profit Loss

us-gaap:ProfitLoss



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-30
Value12498240170113112185162106-12031319310114813782981731238093152
Percentage of ProfitLoss100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.015.711.512.818.0

Comprehensive Income Net Of Tax

us-gaap:ComprehensiveIncomeNetOfTax



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-09-302011-06-302011-03-312010-09-302010-06-302010-03-31
Value119108241170100138196168110720112897114145128839017512480471501096713415310359301561084313785481257332
Percentage of ComprehensiveIncomeNetOfTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.015.911.56.517.814.59.918.918.514.29.44.518.814.67.117.912.78.016.811.65.7

Comprehensive Income Net Of Tax Including Portion Attributable To Noncontrolling Interest

Net Income Loss

us-gaap:NetIncomeLoss



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value12498240170113112187162106-120313193101148137829917412380931521096859150101575515310741641378447401247230
Percentage of NetIncomeLoss100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.015.711.512.818.014.410.08.418.214.09.18.118.514.46.810.117.912.57.76.416.611.55.4

us-gaap:ConsolidationItems

us-gaap:CorporateNonSegment



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-31
Value-21-36-19-7-17-20-19-18-10-123-23-18-8-10-11-11-11-8-12-11-8
Percentage of NetIncomeLoss-16.9-36.7-7.9-4.1-15.0-17.9-10.2-11.1-9.412300.0-11.3-13.7-8.6-9.9-7.4-8.0-13.4-8.1-6.9-8.9-10.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0-1.4-1.1
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:CorporateNonSegment0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:ConsolidationItems, us-gaap:StatementBusinessSegments

us-gaap:OperatingSegments, awk:MarketBasedBusinesses



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-31
Value22-1823212014-71312914971371361112127
Percentage of NetIncomeLoss17.7-18.49.612.417.712.5-3.78.011.3-900.06.96.97.512.94.79.57.311.16.99.88.7
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.01.51.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:OperatingSegments awk:MarketBasedBusinesses0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:OperatingSegments, awk:RegulatedBusiness



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-31
Value1231522361561101182131671041132121409498152135879617412281
Percentage of NetIncomeLoss99.2155.198.391.897.3105.4113.9103.198.1-11300.0104.4106.9101.197.0102.798.5106.197.0100.099.1101.2
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.015.611.6
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:OperatingSegments awk:RegulatedBusiness0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:StatementEquityComponents

us-gaap:RetainedEarnings



Period End2020-03-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-03-312011-03-312010-03-31
Value124240170113112187162106-1203131931011481378299173123809315210968591501015755153414730
Percentage of NetIncomeLoss100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.099.9100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.015.711.512.818.014.410.08.418.214.09.18.118.56.87.75.4
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:RetainedEarnings0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

Net Income Loss Available To Common Stockholders Basic

Net Income Loss Available To Common Stockholders Diluted

Net Income Loss Attributable To Noncontrolling Interest

Assets

us-gaap:Assets



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302009-12-31
Value2354622682222382185421464212232088020471197281948219361189661861018482179711770617417172411710516732162631613015715154261527415069152281497714769147181459914412140871477614538143471412814079139831377313452
Percentage of Assets100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ConsolidationItems

us-gaap:CorporateNonSegment



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302011-12-31
Value19341356139114601508154414921456130712811371141414231440140614031433148715161625151614731244127414921354175515931776177717431676
Percentage of Assets8.26.06.36.77.07.37.17.16.66.67.17.57.67.87.87.98.28.68.99.79.39.17.98.39.89.011.510.612.012.111.911.3
Percentage of Assets8.26.06.36.77.07.37.17.16.66.67.17.57.67.87.87.98.28.68.99.79.39.17.98.39.89.011.510.612.012.111.911.3
Percentage of Assets us-gaap:CorporateNonSegment100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ConsolidationItems, us-gaap:StatementBusinessSegments

us-gaap:OperatingSegments, awk:MarketBasedBusinesses



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-09-30
Value10371008106010561019999973818604599600570555637545523512496497329310309
Percentage of Assets4.44.44.84.84.74.74.74.03.13.13.13.03.03.43.03.02.92.92.92.01.92.0
Percentage of Assets4.44.44.84.84.74.74.74.03.13.13.13.03.03.43.03.02.92.92.92.01.92.0
Percentage of Assets us-gaap:OperatingSegments awk:MarketBasedBusinesses100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OperatingSegments, awk:RegulatedBusiness



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-09-302014-06-30
Value2057520318197871933818937186801841518197178171760217390169821663216405160201578015472152581509114777144311416113857
Percentage of Assets87.489.689.088.588.288.088.288.990.390.489.889.589.488.889.189.188.888.588.288.388.790.189.8
Percentage of Assets87.489.689.088.588.288.088.288.990.390.489.889.589.488.889.189.188.888.588.288.388.790.189.8
Percentage of Assets us-gaap:OperatingSegments awk:RegulatedBusiness100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Liabilities And Stockholders Equity

us-gaap:LiabilitiesAndStockholdersEquity



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312009-12-31
Value235462268222238218542146421223208802047119728194821936118966186101848217971177061741717241171051673216263161301571515426152741506915228149771476914718145991441214087147761453814347141281407913452
Percentage of LiabilitiesAndStockholdersEquity100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Stockholders Equity

us-gaap:StockholdersEquity



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-03-312009-12-312008-12-312007-12-31
Value624361216190602759325864586057365451538555185384528752185238515350825049516550544993491547274632457245074443444743214250423542584157415041324003400541064546
Percentage of StockholdersEquity100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets26.527.027.827.627.627.628.128.027.627.628.528.428.428.229.129.129.229.330.230.230.730.531.430.430.530.530.230.530.030.228.729.329.029.429.30.029.80.00.0

us-gaap:StatementEquityComponents

us-gaap:AccumulatedDefinedBenefitPlansAdjustmentNetTransitionAssetObligation



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302014-12-31
Value-94-94-102-102-102-102-140-140-140-140-147-147-147-147-126-126-126-126-116-116
Percentage of StockholdersEquity-1.5-1.5-1.6-1.7-1.7-1.7-2.4-2.4-2.6-2.6-2.7-2.7-2.8-2.8-2.4-2.4-2.5-2.5-2.2-2.4
Percentage of Assets-0.4-0.4-0.5-0.5-0.5-0.5-0.7-0.7-0.7-0.7-0.8-0.8-0.8-0.8-0.7-0.7-0.7-0.7-0.7-0.7
Percentage of Assets us-gaap:AccumulatedDefinedBenefitPlansAdjustmentNetTransitionAssetObligation0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:AccumulatedDefinedBenefitPlansAdjustmentNetUnamortizedGainLoss



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302014-12-31
Value6160585757565553474947464442403937363531
Percentage of StockholdersEquity1.01.00.90.91.01.00.90.90.90.90.90.90.80.80.80.80.70.70.70.6
Percentage of Assets0.30.30.30.30.30.30.30.30.20.30.20.20.20.20.20.20.20.20.20.2
Percentage of Assets us-gaap:AccumulatedDefinedBenefitPlansAdjustmentNetUnamortizedGainLoss0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:AccumulatedGainLossNetCashFlowHedgeParent



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value-9-3-3-3-41023161610
Percentage of StockholdersEquity-0.1-0.0-0.0-0.0-0.10.20.40.30.30.2
Percentage of Assets-0.0-0.0-0.0-0.0-0.00.00.10.10.10.1
Percentage of Assets us-gaap:AccumulatedGainLossNetCashFlowHedgeParent0.00.00.00.00.00.00.00.00.00.0

us-gaap:AccumulatedOtherComprehensiveIncome



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312013-12-312012-12-312011-03-312010-12-312010-03-312009-12-312008-12-312007-12-31
Value-41-36-46-47-47-34-60-69-75-79-87-85-82-86-99-96-87-88-79-80-82-82-35-116-69-71-63-64-82-18
Percentage of StockholdersEquity-0.7-0.6-0.7-0.8-0.8-0.6-1.0-1.2-1.4-1.5-1.6-1.6-1.6-1.6-1.9-1.9-1.7-1.7-1.5-1.6-1.6-1.7-0.7-2.6-1.7-1.7-1.6-1.6-2.0-0.4
Percentage of Assets-0.2-0.2-0.2-0.2-0.2-0.2-0.3-0.3-0.4-0.4-0.4-0.4-0.4-0.5-0.6-0.5-0.5-0.5-0.5-0.5-0.5-0.5-0.2-0.8-0.5-0.50.0-0.50.00.0
Percentage of Assets us-gaap:AccumulatedOtherComprehensiveIncome0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:AccumulatedTranslationAdjustment



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302014-12-31
Value00001111111112223223
Percentage of StockholdersEquity0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.10.00.00.1
Percentage of Assets0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0
Percentage of Assets us-gaap:AccumulatedTranslationAdjustment0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:AdditionalPaidInCapital



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312013-12-312012-12-312011-03-312010-12-312010-03-312009-12-312008-12-312007-12-31
Value671367006695668366686657664766376438643264236416640063886388638263686351634963246314630262626223616461566142614058885637
Percentage of StockholdersEquity107.5109.5108.2110.9112.4113.5113.4115.7118.1119.4116.4119.2121.1122.4122.0123.9125.3125.8122.9125.1126.5128.2132.5140.1148.5149.0153.4153.3143.4124.0
Percentage of Assets28.529.530.130.631.131.431.832.432.633.033.233.834.434.635.536.036.636.837.137.838.839.141.642.343.643.70.045.60.00.0
Percentage of Assets us-gaap:AdditionalPaidInCapital0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:CommonStock



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312013-12-312012-12-312011-03-312010-12-312010-03-312009-12-312008-12-312007-12-31
Value222222222222222222222222111111
Percentage of StockholdersEquity0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0
Percentage of Assets0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0
Percentage of Assets us-gaap:CommonStock0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:RetainedEarnings



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312013-12-312012-12-312011-03-312010-12-312010-03-312009-12-312008-12-312007-12-31
Value-83-207-123-273-353-464-432-537-617-723-573-702-759-873-839-921-991-1073-1050-1162-1224-1296-1496-1665-1950-1959-2082-2076-1705-1079
Percentage of StockholdersEquity-1.3-3.4-2.0-4.5-6.0-7.9-7.4-9.4-11.3-13.4-10.4-13.0-14.4-16.7-16.0-17.9-19.5-21.3-20.3-23.0-24.5-26.4-31.6-37.5-47.0-47.4-52.0-51.8-41.5-23.7
Percentage of Assets-0.4-0.9-0.6-1.2-1.6-2.2-2.1-2.6-3.1-3.7-3.0-3.7-4.1-4.7-4.7-5.2-5.7-6.2-6.1-6.9-7.5-8.0-9.9-11.3-13.8-13.90.0-15.40.00.0
Percentage of Assets us-gaap:RetainedEarnings0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:TreasuryStock



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312013-12-312011-03-312010-12-312010-03-312009-12-312008-12-312007-12-31
Value-348-338-338-338-338-297-297-297-297-247-247-247-274-213-214-214-210-143-57-30-17-11-5000000
Percentage of StockholdersEquity-5.6-5.5-5.5-5.6-5.7-5.1-5.1-5.2-5.4-4.6-4.5-4.6-5.2-4.1-4.1-4.2-4.1-2.8-1.1-0.6-0.3-0.2-0.10.0-0.00.00.0-0.00.0
Percentage of Assets-1.5-1.5-1.5-1.5-1.6-1.4-1.4-1.5-1.5-1.3-1.3-1.3-1.5-1.2-1.2-1.2-1.2-0.8-0.3-0.2-0.1-0.1-0.00.0-0.00.00.00.00.0
Percentage of Assets us-gaap:TreasuryStock0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

Assets Current

us-gaap:AssetsCurrent



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312009-12-31
Value180112857997416917818008337297208608087677848016916386578798907296617567076875506135454914996426065891397147914931305534499
Percentage of AssetsCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets7.65.73.63.43.23.73.84.13.73.74.44.34.14.24.53.93.73.85.15.34.54.14.84.64.53.74.03.63.33.44.44.24.29.510.210.49.23.83.7

Cash And Cash Equivalents At Carrying Value

us-gaap:CashAndCashEquivalentsAtCarryingValue



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312008-12-312007-12-31
Value55660946463130866855559364787546526645751442423743230263220212418129141513131323201222913
Percentage of CashAndCashEquivalentsAtCarryingValue100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets2.40.30.40.30.30.60.40.30.30.30.50.30.40.40.30.30.40.30.40.90.10.10.50.20.20.20.20.10.10.20.10.10.10.10.10.10.10.10.20.10.00.20.00.0

Accounts Receivable Net Current

us-gaap:AccountsReceivableNetCurrent



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312014-12-31
Value292294335337307301347324273272312288250269302240220255232
Percentage of AccountsReceivableNetCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets1.21.31.51.51.41.41.71.61.41.41.61.51.31.51.71.41.31.51.4

Receivables Net Current

Inventory Raw Materials And Supplies

us-gaap:InventoryRawMaterialsAndSupplies



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312009-12-31
Value504446484441424242414241413940424138373838373736353235333129313130283031302829
Percentage of InventoryRawMaterialsAndSupplies100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets0.20.20.20.20.20.20.20.20.20.20.20.20.20.20.20.20.20.20.20.20.20.20.20.20.20.20.20.20.20.20.20.20.20.20.20.20.20.20.2

Other Assets Current

us-gaap:OtherAssetsCurrent



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312009-12-31
Value11911811591859593160145113151151148118105484231314163452827312838314130805762547174614852
Percentage of OtherAssetsCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets0.50.50.50.40.40.40.40.80.70.60.80.80.80.60.60.30.20.20.20.20.40.30.20.20.20.20.30.20.30.20.60.40.40.40.50.50.40.30.4

Property Plant And Equipment Gross

us-gaap:PropertyPlantAndEquipmentGross



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312014-12-31
Value24351239412380723355234762320422734223612199521716209462057520189199541937619058187451850417269
Percentage of PropertyPlantAndEquipmentGross100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets103.4105.6107.1106.9109.4109.3108.9109.2111.5111.5108.2108.5108.5108.0107.8107.6107.6107.3107.1

Accumulated Depreciation Depletion And Amortization Property Plant And Equipment

us-gaap:AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312009-12-31
Value576357095656555758535795567155845518547052655184506149624817474146474571262247239248239243233228223215207199189180173164161161153143117
Percentage of AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets24.525.225.425.427.327.327.227.328.028.127.227.327.226.826.826.826.726.51.51.51.51.51.51.61.51.51.51.41.41.41.31.31.21.11.11.11.11.00.9

Property Plant And Equipment Net

us-gaap:PropertyPlantAndEquipmentNet



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312009-12-31
Value185881823218151177981762317409170631677716477162461568115391151281499214559143171409813933136051335713098130291279912582124691239112112119271179211739115341138711139110211078710599105551120110677
Percentage of PropertyPlantAndEquipmentNet100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets78.980.481.681.482.182.081.782.083.583.481.081.281.381.181.080.980.980.879.579.880.580.881.481.681.682.279.579.679.879.879.079.079.174.674.273.974.779.679.4

Goodwill

us-gaap:Goodwill



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-11-302013-09-302013-06-302013-03-312012-12-312012-11-302012-09-302012-06-302012-03-312011-12-312011-11-302011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302009-12-31
Value14991501157615751575157515711621137913791373137313451345131313131313130213121209120812081208120812081207120712071207120712071207120712071195119511951195119512041250119511951250
Percentage of Goodwill100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets6.46.67.17.27.37.47.57.97.07.17.17.27.27.37.37.47.57.67.77.27.47.57.77.87.98.00.07.98.18.28.20.08.38.48.58.10.08.28.38.58.98.58.79.3

Finite Lived Intangible Assets Net

Deferred Tax Assets Liabilities Net

Other Assets Noncurrent

us-gaap:OtherAssetsNoncurrent



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312009-12-31
Value2032072012025763767081767370727275797978687067695960606061596263595956575851515053
Percentage of OtherAssetsNoncurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets0.90.90.90.90.30.30.40.30.40.40.40.40.40.40.40.40.50.50.40.40.40.40.40.40.40.40.40.40.40.40.40.40.40.40.40.40.40.40.4

Liabilities Current

us-gaap:LiabilitiesCurrent



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312009-12-31
Value2767204514881317215620941748295125392325174726612418239219281740161415331165151212271240105812341197123511411049958994100510177431489138013271134774607
Percentage of LiabilitiesCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets11.89.06.76.010.09.98.414.412.911.99.014.013.012.910.79.89.38.96.89.07.57.76.78.07.88.27.57.06.56.86.97.15.310.19.59.38.05.54.5

Long Term Debt Current

Accounts Payable Current

us-gaap:AccountsPayableCurrent



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312009-12-31
Value152203149140130175141139133195144134108154135148116126281283203285260192183264209178166279202183162243190159132199138
Percentage of AccountsPayableCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets0.60.90.70.60.60.80.70.70.71.00.70.70.60.80.80.80.70.71.61.71.31.81.71.21.21.81.41.21.11.91.41.31.21.61.31.10.91.41.0

Taxes Payable Current

us-gaap:TaxesPayableCurrent



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312009-12-31
Value644678616445674864336147673145395826464155244637543246375135433959364747654645
Percentage of TaxesPayableCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets0.30.20.40.30.30.20.30.20.30.20.30.20.40.20.30.20.30.20.30.20.30.20.30.20.40.20.30.20.30.20.30.30.40.20.30.30.50.30.3

Accrued Income Taxes Current

Other Liabilities Current

us-gaap:OtherLiabilitiesCurrent



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312009-12-31
Value16417417217720419616915215916715112513511211811183144338248267363282231212241281198189239321255208223232222166193189
Percentage of OtherLiabilitiesCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets0.70.80.80.81.00.90.80.70.80.90.80.70.70.60.70.60.50.82.01.51.62.31.81.51.41.61.81.31.31.62.21.81.51.51.61.61.21.41.4

Liabilities Noncurrent

Long Term Debt

us-gaap:FairValueByMeasurementBasis

us-gaap:LongTermDebt

us-gaap:CarryingReportedAmountFairValueDisclosure



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-31
Value86678664866686667628763878316706681468097357633363166320
Percentage of LongTermDebt100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets36.838.239.039.735.536.037.532.834.535.038.033.433.934.2
Percentage of Assets us-gaap:CarryingReportedAmountFairValueDisclosure0.00.00.00.00.00.00.00.00.00.00.00.00.00.0

Long Term Debt Noncurrent

Deferred Tax Liabilities Noncurrent

Pension And Other Postretirement Defined Benefit Plans Liabilities Noncurrent

Minority Interest

Other Liabilities Noncurrent

us-gaap:OtherLiabilitiesNoncurrent



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312009-12-31
Value7578767675787884746674706867908970685448363736373738364098114393840383639424547
Percentage of OtherLiabilitiesNoncurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets0.30.30.30.30.30.40.40.40.40.30.40.40.40.40.50.50.40.40.30.30.20.20.20.20.20.30.20.30.70.80.30.30.30.30.30.30.30.30.4

Stockholders Equity

us-gaap:StockholdersEquity



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-03-312009-12-312008-12-312007-12-31
Value624361216190602759325864586057365451538555185384528752185238515350825049516550544993491547274632457245074443444743214250423542584157415041324003400541064546
Percentage of StockholdersEquity100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets26.527.027.827.627.627.628.128.027.627.628.528.428.428.229.129.129.229.330.230.230.730.531.430.430.530.530.230.530.030.228.729.329.029.429.30.029.80.00.0

us-gaap:StatementEquityComponents

us-gaap:AccumulatedDefinedBenefitPlansAdjustmentNetTransitionAssetObligation



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302014-12-31
Value-94-94-102-102-102-102-140-140-140-140-147-147-147-147-126-126-126-126-116-116
Percentage of StockholdersEquity-1.5-1.5-1.6-1.7-1.7-1.7-2.4-2.4-2.6-2.6-2.7-2.7-2.8-2.8-2.4-2.4-2.5-2.5-2.2-2.4
Percentage of Assets-0.4-0.4-0.5-0.5-0.5-0.5-0.7-0.7-0.7-0.7-0.8-0.8-0.8-0.8-0.7-0.7-0.7-0.7-0.7-0.7
Percentage of Assets us-gaap:AccumulatedDefinedBenefitPlansAdjustmentNetTransitionAssetObligation0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:AccumulatedDefinedBenefitPlansAdjustmentNetUnamortizedGainLoss



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302014-12-31
Value6160585757565553474947464442403937363531
Percentage of StockholdersEquity1.01.00.90.91.01.00.90.90.90.90.90.90.80.80.80.80.70.70.70.6
Percentage of Assets0.30.30.30.30.30.30.30.30.20.30.20.20.20.20.20.20.20.20.20.2
Percentage of Assets us-gaap:AccumulatedDefinedBenefitPlansAdjustmentNetUnamortizedGainLoss0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:AccumulatedGainLossNetCashFlowHedgeParent



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value-9-3-3-3-41023161610
Percentage of StockholdersEquity-0.1-0.0-0.0-0.0-0.10.20.40.30.30.2
Percentage of Assets-0.0-0.0-0.0-0.0-0.00.00.10.10.10.1
Percentage of Assets us-gaap:AccumulatedGainLossNetCashFlowHedgeParent0.00.00.00.00.00.00.00.00.00.0

us-gaap:AccumulatedOtherComprehensiveIncome



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312013-12-312012-12-312011-03-312010-12-312010-03-312009-12-312008-12-312007-12-31
Value-41-36-46-47-47-34-60-69-75-79-87-85-82-86-99-96-87-88-79-80-82-82-35-116-69-71-63-64-82-18
Percentage of StockholdersEquity-0.7-0.6-0.7-0.8-0.8-0.6-1.0-1.2-1.4-1.5-1.6-1.6-1.6-1.6-1.9-1.9-1.7-1.7-1.5-1.6-1.6-1.7-0.7-2.6-1.7-1.7-1.6-1.6-2.0-0.4
Percentage of Assets-0.2-0.2-0.2-0.2-0.2-0.2-0.3-0.3-0.4-0.4-0.4-0.4-0.4-0.5-0.6-0.5-0.5-0.5-0.5-0.5-0.5-0.5-0.2-0.8-0.5-0.50.0-0.50.00.0
Percentage of Assets us-gaap:AccumulatedOtherComprehensiveIncome0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:AccumulatedTranslationAdjustment



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302014-12-31
Value00001111111112223223
Percentage of StockholdersEquity0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.10.00.00.1
Percentage of Assets0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0
Percentage of Assets us-gaap:AccumulatedTranslationAdjustment0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:AdditionalPaidInCapital



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312013-12-312012-12-312011-03-312010-12-312010-03-312009-12-312008-12-312007-12-31
Value671367006695668366686657664766376438643264236416640063886388638263686351634963246314630262626223616461566142614058885637
Percentage of StockholdersEquity107.5109.5108.2110.9112.4113.5113.4115.7118.1119.4116.4119.2121.1122.4122.0123.9125.3125.8122.9125.1126.5128.2132.5140.1148.5149.0153.4153.3143.4124.0
Percentage of Assets28.529.530.130.631.131.431.832.432.633.033.233.834.434.635.536.036.636.837.137.838.839.141.642.343.643.70.045.60.00.0
Percentage of Assets us-gaap:AdditionalPaidInCapital0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:CommonStock



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312013-12-312012-12-312011-03-312010-12-312010-03-312009-12-312008-12-312007-12-31
Value222222222222222222222222111111
Percentage of StockholdersEquity0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0
Percentage of Assets0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0
Percentage of Assets us-gaap:CommonStock0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:RetainedEarnings



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312013-12-312012-12-312011-03-312010-12-312010-03-312009-12-312008-12-312007-12-31
Value-83-207-123-273-353-464-432-537-617-723-573-702-759-873-839-921-991-1073-1050-1162-1224-1296-1496-1665-1950-1959-2082-2076-1705-1079
Percentage of StockholdersEquity-1.3-3.4-2.0-4.5-6.0-7.9-7.4-9.4-11.3-13.4-10.4-13.0-14.4-16.7-16.0-17.9-19.5-21.3-20.3-23.0-24.5-26.4-31.6-37.5-47.0-47.4-52.0-51.8-41.5-23.7
Percentage of Assets-0.4-0.9-0.6-1.2-1.6-2.2-2.1-2.6-3.1-3.7-3.0-3.7-4.1-4.7-4.7-5.2-5.7-6.2-6.1-6.9-7.5-8.0-9.9-11.3-13.8-13.90.0-15.40.00.0
Percentage of Assets us-gaap:RetainedEarnings0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:TreasuryStock



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312013-12-312011-03-312010-12-312010-03-312009-12-312008-12-312007-12-31
Value-348-338-338-338-338-297-297-297-297-247-247-247-274-213-214-214-210-143-57-30-17-11-5000000
Percentage of StockholdersEquity-5.6-5.5-5.5-5.6-5.7-5.1-5.1-5.2-5.4-4.6-4.5-4.6-5.2-4.1-4.1-4.2-4.1-2.8-1.1-0.6-0.3-0.2-0.10.0-0.00.00.0-0.00.0
Percentage of Assets-1.5-1.5-1.5-1.5-1.6-1.4-1.4-1.5-1.5-1.3-1.3-1.3-1.5-1.2-1.2-1.2-1.2-0.8-0.3-0.2-0.1-0.1-0.00.0-0.00.00.00.00.0
Percentage of Assets us-gaap:TreasuryStock0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

Common Stock Value

us-gaap:CommonStockValue



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312009-12-31
Value222222222222222222111111111111111111111
Percentage of CommonStockValue100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

Retained Earnings Accumulated Deficit

us-gaap:RetainedEarningsAccumulatedDeficit



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312009-12-31
Value-83-207-123-273-353-464-432-537-617-723-573-702-759-873-839-921-991-1073-1049-1162-1224-1295-1333-1374-1427-1495-1505-1555-1607-1664-1675-1785-1847-1848-1848-1945-1950-1959-2076
Percentage of RetainedEarningsAccumulatedDeficit100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets-0.4-0.9-0.6-1.2-1.6-2.2-2.1-2.6-3.1-3.7-3.0-3.7-4.1-4.7-4.7-5.2-5.7-6.2-6.1-6.9-7.5-8.0-8.5-8.9-9.3-9.9-9.9-10.4-10.9-11.3-11.5-12.4-13.1-12.5-12.7-13.6-13.8-13.9-15.4

Treasury Stock Value

us-gaap:TreasuryStockValue



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312011-12-312011-09-302011-06-302011-03-312010-12-312009-12-31
Value3483383383383382972972972972472472472742132142142101435630161010101055550000000
Percentage of TreasuryStockValue100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.00.00.00.00.0100.00.0
Percentage of Assets1.51.51.51.51.61.41.41.51.51.31.31.31.51.21.21.21.20.80.30.20.10.10.10.10.10.00.00.00.00.00.00.00.00.00.00.0

Accumulated Other Comprehensive Income Loss Net Of Tax

us-gaap:AccumulatedOtherComprehensiveIncomeLossNetOfTax



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312009-12-31
Value-41-36-46-47-47-34-60-69-75-79-87-85-82-86-99-96-87-88-79-80-81-81-35-34-35-34-109-112-114-116-91-93-95-97-68-68-69-71-64
Percentage of AccumulatedOtherComprehensiveIncomeLossNetOfTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets-0.2-0.2-0.2-0.2-0.2-0.2-0.3-0.3-0.4-0.4-0.4-0.4-0.4-0.5-0.6-0.5-0.5-0.5-0.5-0.5-0.5-0.5-0.2-0.2-0.2-0.2-0.7-0.8-0.8-0.8-0.6-0.7-0.7-0.7-0.5-0.5-0.5-0.5-0.5

Net Cash Provided By Used In Operating Activities

us-gaap:NetCashProvidedByUsedInOperatingActivities



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-03-312011-03-312010-03-31
Value180438465312168394467306219463462247277331323437219198257389205244207398140149220418148161175
Percentage of NetCashProvidedByUsedInOperatingActivities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.028.028.535.146.027.135.929.148.119.423.532.450.323.926.431.1

Net Cash Provided By Used In Investing Activities

us-gaap:NetCashProvidedByUsedInInvestingActivities



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-03-312011-03-312010-03-31
Value-450-691-437-466-351-491-396-763-386-651-386-350-285-573-421-476-320-246-292-283-232-205-333-259-231-227-197-215229-166-137
Percentage of NetCashProvidedByUsedInInvestingActivities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0-41.0-35.3-40.0-33.5-30.7-30.1-46.9-31.4-32.0-35.8-28.9-25.937.1-27.2-24.3

Net Cash Provided By Used In Financing Activities

us-gaap:NetCashProvidedByUsedInFinancingActivities



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-03-312011-03-312010-03-31
Value7682281155110140-52472166154-52911427167-3022149-15-6428-35120-1269074-17-197-3825-47
Percentage of NetCashProvidedByUsedInFinancingActivities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.028.47.0-2.1-7.63.8-5.317.0-15.212.511.8-2.6-23.7-61.80.8-8.4

Net Cash Provided By Used In Operating Activities

us-gaap:NetCashProvidedByUsedInOperatingActivities



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-03-312011-03-312010-03-31
Value180438465312168394467306219463462247277331323437219198257389205244207398140149220418148161175
Percentage of NetCashProvidedByUsedInOperatingActivities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.028.028.535.146.027.135.929.148.119.423.532.450.323.926.431.1

Net Income Loss

us-gaap:NetIncomeLoss



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value12498240170113112187162106-120313193101148137829917412380931521096859150101575515310741641378447401247230
Percentage of NetIncomeLoss100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.015.711.512.818.014.410.08.418.214.09.18.118.514.46.810.117.912.57.76.416.611.55.4

us-gaap:ConsolidationItems

us-gaap:CorporateNonSegment



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-31
Value-21-36-19-7-17-20-19-18-10-123-23-18-8-10-11-11-11-8-12-11-8
Percentage of NetIncomeLoss-16.9-36.7-7.9-4.1-15.0-17.9-10.2-11.1-9.412300.0-11.3-13.7-8.6-9.9-7.4-8.0-13.4-8.1-6.9-8.9-10.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0-1.4-1.1
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:CorporateNonSegment0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:ConsolidationItems, us-gaap:StatementBusinessSegments

us-gaap:OperatingSegments, awk:MarketBasedBusinesses



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-31
Value22-1823212014-71312914971371361112127
Percentage of NetIncomeLoss17.7-18.49.612.417.712.5-3.78.011.3-900.06.96.97.512.94.79.57.311.16.99.88.7
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.01.51.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:OperatingSegments awk:MarketBasedBusinesses0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:OperatingSegments, awk:RegulatedBusiness



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-31
Value1231522361561101182131671041132121409498152135879617412281
Percentage of NetIncomeLoss99.2155.198.391.897.3105.4113.9103.198.1-11300.0104.4106.9101.197.0102.798.5106.197.0100.099.1101.2
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.015.611.6
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:OperatingSegments awk:RegulatedBusiness0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:StatementEquityComponents

us-gaap:RetainedEarnings



Period End2020-03-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-03-312011-03-312010-03-31
Value124240170113112187162106-1203131931011481378299173123809315210968591501015755153414730
Percentage of NetIncomeLoss100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.099.9100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.015.711.512.818.014.410.08.418.214.09.18.118.56.87.75.4
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:RetainedEarnings0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

Profit Loss

us-gaap:ProfitLoss



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-30
Value12498240170113112185162106-12031319310114813782981731238093152
Percentage of ProfitLoss100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.015.711.512.818.0

Depreciation Depletion And Amortization

us-gaap:DepreciationDepletionAndAmortization



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-09-302011-06-302011-03-312010-09-302010-06-302010-03-31
Value14515214414214414114113412911412812612412011911511611211110810710510610510610310210199100969292888788848182
Percentage of DepreciationDepletionAndAmortization100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Increase Decrease In Other Operating Capital Net

us-gaap:IncreaseDecreaseInOtherOperatingCapitalNet



Period End2020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-312017-09-302017-06-302017-03-312016-09-302016-06-302016-03-312015-09-302015-06-302015-03-31
Value982413-4922-5530-2727349-14-612
Percentage of IncreaseDecreaseInOtherOperatingCapitalNet100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Net Cash Provided By Used In Investing Activities

us-gaap:NetCashProvidedByUsedInInvestingActivities



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-03-312011-03-312010-03-31
Value-450-691-437-466-351-491-396-763-386-651-386-350-285-573-421-476-320-246-292-283-232-205-333-259-231-227-197-215229-166-137
Percentage of NetCashProvidedByUsedInInvestingActivities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0-41.0-35.3-40.0-33.5-30.7-30.1-46.9-31.4-32.0-35.8-28.9-25.937.1-27.2-24.3

Payments To Acquire Property Plant And Equipment

us-gaap:PaymentsToAcquirePropertyPlantAndEquipment



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-09-302011-06-302011-03-312010-09-302010-06-302010-03-31
Value408539403386326450397375364470362332270383331313284369312209192314235216213248204242233230215176194184142
Percentage of PaymentsToAcquirePropertyPlantAndEquipment100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ConsolidationItems

us-gaap:CorporateNonSegment



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-30
Value112471922272821234000000000
Percentage of PaymentsToAcquirePropertyPlantAndEquipment0.20.20.51.02.14.25.57.27.74.56.412.00.00.00.00.00.00.00.00.0

us-gaap:ConsolidationItems, us-gaap:StatementBusinessSegments

us-gaap:OperatingSegments, awk:MarketBasedBusinesses



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-30
Value3324442161133
Percentage of PaymentsToAcquirePropertyPlantAndEquipment0.70.60.51.01.20.90.50.31.62.30.80.9

us-gaap:OperatingSegments, awk:RegulatedBusiness



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-30
Value404535399378315427373347330438336289
Percentage of PaymentsToAcquirePropertyPlantAndEquipment99.099.399.097.996.694.994.092.590.793.292.887.0

Net Cash Provided By Used In Financing Activities

us-gaap:NetCashProvidedByUsedInFinancingActivities



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-03-312011-03-312010-03-31
Value7682281155110140-52472166154-52911427167-3022149-15-6428-35120-1269074-17-197-3825-47
Percentage of NetCashProvidedByUsedInFinancingActivities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.028.47.0-2.1-7.63.8-5.317.0-15.212.511.8-2.6-23.7-61.80.8-8.4

Proceeds From Issuance Of Long Term Debt

us-gaap:ProceedsFromIssuanceOfLongTermDebt



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-08-092018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302015-12-312015-09-302014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-03-312011-03-312010-03-31
Value83397118223130013405101313622005510155505000040110130001401
Percentage of ProceedsFromIssuanceOfLongTermDebt100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0100.00.0100.0100.00.0100.00.00.0100.0100.00.0100.0100.00.0100.0100.0100.0

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

srt:Subsidiaries, awk:FixedRate, awk:PrivateActivityBondsAndGovernmentFundedDebt



Period End2020-03-312019-09-30
Value811
Percentage of ProceedsFromIssuanceOfLongTermDebt100.0157.1

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

us-gaap:SeniorNotes, us-gaap:SubsequentEvent, awk:AmericanWaterCapitalCorpAWCC



Period End2020-04-14
Value989
Percentage of ProceedsFromIssuanceOfLongTermDebt0.0

Repayments Of Long Term Debt

us-gaap:RepaymentsOfLongTermDebt



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-03-312011-03-312010-03-31
Value634271341219621111365623282412472114182231011331247973221010366238
Percentage of RepaymentsOfLongTermDebt100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of LongTermDebtAndCapitalLeaseObligations0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

Payments Of Dividends

Payments Of Dividends

Payments For Repurchase Of Common Stock

us-gaap:PaymentsForRepurchaseOfCommonStock



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-30
Value000036000450005400362872513
Percentage of PaymentsForRepurchaseOfCommonStock0.00.00.00.0100.00.00.00.0100.00.00.00.0100.00.00.0100.0100.0100.0100.0100.0

Repayments Of Long Term Debt

us-gaap:RepaymentsOfLongTermDebt



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-03-312011-03-312010-03-31
Value634271341219621111365623282412472114182231011331247973221010366238
Percentage of RepaymentsOfLongTermDebt100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of LongTermDebtAndCapitalLeaseObligations0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

Debt Instrument Interest Rate Stated Percentage

Effective Income Tax Rate Continuing Operations

us-gaap:EffectiveIncomeTaxRateContinuingOperations



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-09-302012-06-302012-03-312011-09-302011-06-302011-03-312010-09-302010-06-30
Value0.220.00400000000000000360.2450.2510.2570.015999999999999960.2750.270.2430.1340.4030.4180.3590.00.3910.3910.397-0.00500000000000000440.3940.3960.4-0.0070000000000000060.4060.3980.3970.00200000000000000180.3950.3960.3510.3960.4090.4180.3790.4070.4070.3880.406
Percentage of EffectiveIncomeTaxRateContinuingOperations100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Number

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

Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Grants In Period

Share Based Compensation

Deferred Tax Liabilities

Deferred Tax Assets Net

Unrecognized Tax Benefits

Deferred Tax Assets Valuation Allowance

Unrecognized Tax Benefits Increases Resulting From Current Period Tax Positions

Operating Lease Right Of Use Asset

us-gaap:OperatingLeaseRightOfUseAsset



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-31
Value1011031091121160
Percentage of OperatingLeaseRightOfUseAsset100.0100.0100.0100.0100.00.0

Cash And Cash Equivalents Period Increase Decrease

Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents

us-gaap:CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312015-12-31
Value589911168786159116978283122931059972
Percentage of CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Proceeds From Repayments Of Short Term Debt

us-gaap:StatementBusinessSegments

awk:AlternativeRevenuePrograms

awk:RegulatedBusiness



Period End2020-03-312019-12-312019-09-302019-06-302018-09-302018-06-30
Value7-7-117811
Percentage of AlternativeRevenuePrograms100.0100.0100.0100.0100.0100.0

awk:BenefitCostsNonOperatingNet



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value-13-4-4-4-4-10-5-2-32223
Percentage of BenefitCostsNonOperatingNet100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

awk:ProceedsFromIssuancesOfEmployeeStockPlansAndDirectStockPurchasePlanNet



Period End2020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-31
Value5-7-71-2-71
Percentage of ProceedsFromIssuancesOfEmployeeStockPlansAndDirectStockPurchasePlanNet100.0100.0100.0100.0100.0100.0100.0

awk:ProceedsfromTermLoan



Period End2020-03-312019-03-31
Value5000
Percentage of ProceedsfromTermLoan100.00.0

us-gaap:BusinessCombinationConsiderationTransferred1



Period End2020-03-312019-09-30
Value215
Percentage of BusinessCombinationConsiderationTransferred1100.0100.0

us-gaap:CapitalExpendituresIncurredButNotYetPaid



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-03-312011-03-312010-03-31
Value256-105110184-67517529303142-11151166283571332247510992413814024756655
Percentage of CapitalExpendituresIncurredButNotYetPaid100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value498-25291-73431915-1-3929-126
Percentage of CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DeferredIncomeTaxesAndTaxCredits



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-31
Value3845785035536049331981277364598982525910812700-10910800
Percentage of DeferredIncomeTaxesAndTaxCredits100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:RetirementPlanType

us-gaap:DefinedBenefitPlanAmortizationOfGainsLosses

us-gaap:OtherPostretirementBenefitPlansDefinedBenefit



Period End2020-03-312019-12-312019-09-302019-03-312018-12-312018-09-30
Value-1000000.00.0-1000000.0-1000000.00.0-1000000.0
Percentage of DefinedBenefitPlanAmortizationOfGainsLosses100.00.0100.0100.00.0100.0

us-gaap:PensionPlansDefinedBenefit



Period End2020-03-312019-12-312019-09-302019-03-312018-12-312018-09-30
Value-8-8-8-8-7-6
Percentage of DefinedBenefitPlanAmortizationOfGainsLosses800.00.0800.0800.00.0600.0

us-gaap:RetirementPlanType

us-gaap:DefinedBenefitPlanAmortizationOfPriorServiceCostCredit

us-gaap:OtherPostretirementBenefitPlansDefinedBenefit



Period End2020-03-312019-12-312019-09-302019-03-312018-12-312018-09-30
Value-8-9-9-8-7-7
Percentage of DefinedBenefitPlanAmortizationOfPriorServiceCostCredit100.0100.0100.0100.0100.0100.0

us-gaap:PensionPlansDefinedBenefit



Period End2020-03-312019-12-312019-09-302019-03-312018-12-312018-09-30
Value-1000000.00.0-1000000.0-1000000.01000000.00.0
Percentage of DefinedBenefitPlanAmortizationOfPriorServiceCostCredit12.5-0.011.112.5-14.3-0.0

us-gaap:RetirementPlanType

us-gaap:DefinedBenefitPlanContributionsByEmployer

us-gaap:OtherPostretirementBenefitPlansDefinedBenefit



Period End2020-03-312019-12-312019-09-302019-03-312018-12-312018-09-30
Value0-200-20
Percentage of DefinedBenefitPlanContributionsByEmployer0.0100.00.00.0100.00.0

us-gaap:PensionPlansDefinedBenefit



Period End2020-03-312019-12-312019-09-302019-03-312018-12-312018-09-30
Value1010971311
Percentage of DefinedBenefitPlanContributionsByEmployer0.0-500.00.00.0-650.00.0

us-gaap:RetirementPlanType

us-gaap:DefinedBenefitPlanExpectedReturnOnPlanAssets

us-gaap:OtherPostretirementBenefitPlansDefinedBenefit



Period End2020-03-312019-12-312019-09-302019-03-312018-12-312018-09-30
Value445467
Percentage of DefinedBenefitPlanExpectedReturnOnPlanAssets100.0100.0100.0100.0100.0100.0

us-gaap:PensionPlansDefinedBenefit



Period End2020-03-312019-12-312019-09-302019-03-312018-12-312018-09-30
Value282323222424
Percentage of DefinedBenefitPlanExpectedReturnOnPlanAssets700.0575.0460.0550.0400.0342.9

us-gaap:RetirementPlanType

us-gaap:DefinedBenefitPlanInterestCost

us-gaap:OtherPostretirementBenefitPlansDefinedBenefit



Period End2020-03-312019-12-312019-09-302019-03-312018-12-312018-09-30
Value344345
Percentage of DefinedBenefitPlanInterestCost100.0100.0100.0100.0100.0100.0

us-gaap:PensionPlansDefinedBenefit



Period End2020-03-312019-12-312019-09-302019-03-312018-12-312018-09-30
Value192021201919
Percentage of DefinedBenefitPlanInterestCost633.3500.0525.0666.7475.0380.0

us-gaap:RetirementPlanType

us-gaap:DefinedBenefitPlanNetPeriodicBenefitCost

us-gaap:OtherPostretirementBenefitPlansDefinedBenefit



Period End2020-03-312019-12-312019-09-302019-03-312018-12-312018-09-30
Value-7-8-8-7-8-6
Percentage of DefinedBenefitPlanNetPeriodicBenefitCost100.0100.0100.0100.0100.0100.0

us-gaap:PensionPlansDefinedBenefit



Period End2020-03-312019-12-312019-09-302019-03-312018-12-312018-09-30
Value6121212129
Percentage of DefinedBenefitPlanNetPeriodicBenefitCost-85.7-150.0-150.0-171.4-150.0-150.0

us-gaap:RetirementPlanType

us-gaap:DefinedBenefitPlanServiceCost

us-gaap:OtherPostretirementBenefitPlansDefinedBenefit



Period End2020-03-312019-12-312019-09-302019-03-312018-12-312018-09-30
Value111112
Percentage of DefinedBenefitPlanServiceCost100.0100.0100.0100.0100.0100.0

us-gaap:PensionPlansDefinedBenefit



Period End2020-03-312019-12-312019-09-302019-03-312018-12-312018-09-30
Value877798
Percentage of DefinedBenefitPlanServiceCost800.0700.0700.0700.0900.0400.0

us-gaap:GainLossOnDispositionOfAssets1



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-30
Value0-430630180277202521001110
Percentage of GainLossOnDispositionOfAssets10.0100.00.0100.0100.00.0100.00.0100.0100.0100.0100.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:IncreaseDecreaseInAccountsPayableAndAccruedLiabilities



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-30
Value-91823140-87483119-73602426-72-1241627155930-1221465
Percentage of IncreaseDecreaseInAccountsPayableAndAccruedLiabilities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:IncreaseDecreaseInReceivables



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-03-312011-03-312010-03-31
Value4-291445-5-532961-20-553154-51-527062-49-6274638-152357-3-304483-18-6221-11-26-14
Percentage of IncreaseDecreaseInReceivables100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:InterestIncomeExpenseNonoperatingNet



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-31
Value-96-98-97-94-93-91-89-86-84-83-89-85-85-83-81-81-80-80-77-76-75
Percentage of InterestIncomeExpenseNonoperatingNet100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ConsolidationItems

us-gaap:CorporateNonSegment



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-31
Value-25-26-24-21-21-21-18-19-16-16-23-19-19-19-17-19-16-18-14-16-14
Percentage of InterestIncomeExpenseNonoperatingNet26.026.524.722.322.623.120.222.119.019.325.822.422.422.921.023.520.022.518.221.118.7

us-gaap:ConsolidationItems, us-gaap:StatementBusinessSegments

us-gaap:OperatingSegments, awk:MarketBasedBusinesses



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302015-12-312015-09-302015-06-30
Value1211110211110101101
Percentage of InterestIncomeExpenseNonoperatingNet-1.0-2.0-1.0-1.1-1.1-1.1-0.0-2.3-1.2-1.2-1.1-1.2-0.0-1.2-0.0-1.2-1.2-0.0-1.3

us-gaap:OperatingSegments, awk:RegulatedBusiness



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-31
Value-72-74-74-74-73-71-71-69-69-68-67-67-66-65-64-63-64-63-63-61-61
Percentage of InterestIncomeExpenseNonoperatingNet75.075.576.378.778.578.079.880.282.181.975.378.877.678.379.077.880.078.881.880.381.3

us-gaap:StatementBusinessSegments

us-gaap:LeaseIncome

awk:RegulatedBusiness



Period End2020-03-312019-12-312019-09-302019-06-302018-09-302018-06-30
Value311222
Percentage of LeaseIncome100.0100.0100.0100.0100.0100.0

us-gaap:LitigationCase

us-gaap:LitigationSettlementAmountAwardedToOtherParty

awk:BindingAgreement



Period End2020-03-312018-12-312018-09-302018-06-082018-06-302018-06-302018-03-312017-09-21
Value1260-861261260126126
Percentage of LitigationSettlementAmountAwardedToOtherParty100.00.0100.0100.0100.0100.0100.0

us-gaap:OciBeforeReclassificationsNetOfTaxAttributableToParent



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-06-302017-03-31
Value-6801-1445706-52
Percentage of OciBeforeReclassificationsNetOfTaxAttributableToParent100.0100.00.0100.0100.0100.0100.00.0100.0100.0100.0

us-gaap:StatementEquityComponents

us-gaap:AccumulatedGainLossNetCashFlowHedgeParent



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value-6001-14-15706
Percentage of OciBeforeReclassificationsNetOfTaxAttributableToParent100.00.00.0100.0100.0-33.3100.00.0100.0

us-gaap:OtherComprehensiveIncomeLossCashFlowHedgeGainLossBeforeReclassificationAfterTax



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value-6001-14-15706
Percentage of OtherComprehensiveIncomeLossCashFlowHedgeGainLossBeforeReclassificationAfterTax100.00.00.0100.0100.0100.0100.00.0100.0

us-gaap:OtherComprehensiveIncomeLossCashFlowHedgeGainLossBeforeReclassificationTax



Period End2020-03-312019-12-312019-09-302019-03-312018-12-312018-09-30
Value-200-6-42
Percentage of OtherComprehensiveIncomeLossCashFlowHedgeGainLossBeforeReclassificationTax100.00.00.0100.0100.0100.0

us-gaap:OtherComprehensiveIncomeLossNetOfTax



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-30
Value-51010-13269648-2-3413-3-91-8010-45-10075211-24212-290
Percentage of OtherComprehensiveIncomeLossNetOfTax100.0100.0100.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:StatementEquityComponents

us-gaap:AccumulatedOtherComprehensiveIncome



Period End2020-03-312019-09-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-30
Value-51-13269648-2-3413-3-91-8010-45-10075211-24212-290
Percentage of OtherComprehensiveIncomeLossNetOfTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-06-302017-03-312016-06-302016-03-312013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-09-302011-06-302011-03-312010-09-302010-06-302010-03-31
Value-51010-1326964-34-9111-24212011101
Percentage of OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent100.0100.0100.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:StatementEquityComponents

us-gaap:AccumulatedDefinedBenefitPlansAdjustmentNetUnamortizedGainLoss



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-31
Value12101126-221222121
Percentage of OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent-20.020.0100.00.0-7.73.822.2100.0-50.00.00.0-66.750.00.00.0-22.2100.0

us-gaap:AccumulatedGainLossNetCashFlowHedgeParent



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value-6001-14-13706
Percentage of OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent120.00.00.00.0107.7-50.077.80.0150.0

us-gaap:OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetGainLossNetOfTax



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-30
Value-1-2-10-1-1-2-62-2-1-2-2-2-1-2-1-1-1-1-10000-2-2-2-2-1-1
Percentage of OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetGainLossNetOfTax100.0100.0100.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetGainLossTax



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-30
Value020-10112-12111111150000000111111
Percentage of OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetGainLossTax0.0100.00.0100.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OtherNoncashIncomeExpense



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-30
Value18-10518287-29-81015-113218-121682421190132317
Percentage of OtherNoncashIncomeExpense100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OtherOperatingIncome



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value10-60199-1521135
Percentage of OtherOperatingIncome100.0100.00.0100.0100.0100.0100.0100.0100.0

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

awk:Residential, awk:WaterServices, awk:RegulatedBusiness



Period End2020-03-312019-12-312019-09-302018-12-312018-09-30
Value001-77
Percentage of OtherOperatingIncome0.0-0.00.046.733.3

us-gaap:ProductOrService

us-gaap:ServiceOther



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-30
Value0.00.0-1000000.00.0-1000000.0-1000000.0-1000000.0
Percentage of OtherOperatingIncome0.0-0.00.00.0-11.16.7-4.8

us-gaap:ProductOrService, us-gaap:StatementBusinessSegments

awk:WaterServices, awk:RegulatedBusiness



Period End2020-03-312019-12-312019-09-302018-12-312018-09-30
Value001-1212
Percentage of OtherOperatingIncome0.0-0.00.080.057.1

us-gaap:StatementBusinessSegments

awk:RegulatedBusiness



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value10-611910-1422135
Percentage of OtherOperatingIncome100.0100.00.0100.0111.193.3104.8100.0100.0

us-gaap:PaymentsForProceedsFromRemovalCosts



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-03-312011-03-312010-03-31
Value233330231826212020252315132218271733273114262020101519191018131085
Percentage of PaymentsForProceedsFromRemovalCosts100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:PaymentsOfDividendsCommonStock



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-03-312011-03-31
Value90909091828282817474747467676766616161615555555549494949088444038
Percentage of PaymentsOfDividendsCommonStock100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0100.0100.0100.0100.0

us-gaap:PaymentsRelatedToTaxWithholdingForShareBasedCompensation



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-31
Value110236111501191129
Percentage of PaymentsRelatedToTaxWithholdingForShareBasedCompensation100.00.0100.0100.0100.0100.0100.0100.0100.00.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:PaymentsToAcquireBusinessesNetOfCashAcquired



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-03-312011-03-312010-03-31
Value2115055822174369816717217552222113441023027111200010
Percentage of PaymentsToAcquireBusinessesNetOfCashAcquired100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:PensionAndOtherPostretirementBenefitContributions



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-03-312011-03-312010-03-31
Value10897711110012131211111414141714121216141010191829293333404837
Percentage of PensionAndOtherPostretirementBenefitContributions100.0100.0100.0100.0100.0100.0100.00.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:PensionAndOtherPostretirementBenefitExpense



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-03-312011-03-312010-03-31
Value-1444543881315141511121615151515156666191919192620201722
Percentage of PensionAndOtherPostretirementBenefitExpense100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ProceedsFromAdvancesForConstruction



Period End2020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-03-312011-03-312010-03-31
Value7772834127152559575-3
Percentage of ProceedsFromAdvancesForConstruction100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ProceedsFromLinesOfCredit



Period End2020-03-312019-03-31
Value2150
Percentage of ProceedsFromLinesOfCredit100.00.0

us-gaap:DebtInstrument, dei:LegalEntity

awk:TermLoan, awk:AmericanWaterCapitalCorpAWCC



Period End2020-03-20
Value500
Percentage of ProceedsFromLinesOfCredit0.0

us-gaap:ProceedsFromRepaymentsOfShortTermDebtMaturingInThreeMonthsOrLess



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-31
Value13931377-805237401-1087468278801-1014137131-1011110211250-38121694135-3889919339-9713263-27
Percentage of ProceedsFromRepaymentsOfShortTermDebtMaturingInThreeMonthsOrLess100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ProceedsFromSaleOfProductiveAssets



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-03-312011-03-312010-03-31
Value2311115226166540431100311300000001046100
Percentage of ProceedsFromSaleOfProductiveAssets100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ProvisionForDoubtfulAccounts



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-03-312011-03-312010-03-31
Value6108641110938107499369867109978963135113
Percentage of ProvisionForDoubtfulAccounts100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ReclassificationFromAociCurrentPeriodNetOfTaxAttributableToParent



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-06-302017-03-312016-06-302016-03-31
Value-1-2-11-1-1-2-62-2-2-2-1
Percentage of ReclassificationFromAociCurrentPeriodNetOfTaxAttributableToParent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:StatementEquityComponents

us-gaap:AccumulatedDefinedBenefitPlansAdjustmentNetUnamortizedGainLoss



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-31
Value-1-2-10-1-1-2-62-2-1-2-2-2-1-2-1
Percentage of ReclassificationFromAociCurrentPeriodNetOfTaxAttributableToParent100.0100.0100.00.0100.0100.0100.0100.0100.00.00.0100.0100.00.00.0100.0100.0

us-gaap:RegulatedAndUnregulatedOperatingRevenue



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-31
Value8449021013882813850976853761821936844756802930827743783896782698731846754679
Percentage of RegulatedAndUnregulatedOperatingRevenue100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ConsolidationItems

us-gaap:CorporateNonSegment



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-30
Value-4-6-6-5-6-4-6-5-5-6-6-5-6-6-5-4-5-3-4-5-4-4-4
Percentage of RegulatedAndUnregulatedOperatingRevenue-0.5-0.7-0.6-0.6-0.7-0.5-0.6-0.6-0.7-0.7-0.6-0.6-0.8-0.7-0.5-0.5-0.7-0.5-0.5-0.6-0.6-0.6-0.5

us-gaap:ConsolidationItems, us-gaap:StatementBusinessSegments

us-gaap:OperatingSegments, awk:MarketBasedBusinesses



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-09-30
Value1281371361321341371251141001161001031031131091151141261201008796
Percentage of RegulatedAndUnregulatedOperatingRevenue15.215.213.415.016.516.112.813.413.114.110.712.213.614.111.713.915.316.113.412.812.511.5

us-gaap:OperatingSegments, awk:RegulatedBusiness



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-09-30
Value720771883755685717857744666711842746659695826716634660780687615753
Percentage of RegulatedAndUnregulatedOperatingRevenue85.385.587.285.684.384.487.887.287.586.690.088.487.286.788.886.685.384.387.187.888.189.1

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

awk:Commercial, awk:WastewaterServices, awk:RegulatedBusiness



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value889778877
Percentage of RegulatedAndUnregulatedOperatingRevenue0.90.90.90.80.90.90.80.80.9

awk:Commercial, awk:WaterServices, awk:RegulatedBusiness



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value142162188153136148183152133
Percentage of RegulatedAndUnregulatedOperatingRevenue16.818.018.617.316.717.418.817.817.5

awk:FireService, awk:WaterServices, awk:RegulatedBusiness



Period End2020-03-312019-12-312019-09-302019-06-302019-03-31
Value3736373534
Percentage of RegulatedAndUnregulatedOperatingRevenue4.44.03.74.04.2

awk:Industrial, awk:WastewaterServices, awk:RegulatedBusiness



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value11101-8301
Percentage of RegulatedAndUnregulatedOperatingRevenue0.10.10.10.00.1-0.90.30.00.1

awk:Industrial, awk:WaterServices, awk:RegulatedBusiness



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value323438343231403431
Percentage of RegulatedAndUnregulatedOperatingRevenue3.83.83.83.93.93.64.14.04.1

awk:PublicandOther, awk:WastewaterServices, awk:RegulatedBusiness



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value3425312143
Percentage of RegulatedAndUnregulatedOperatingRevenue0.40.40.20.60.41.40.10.50.4

awk:PublicandOther, awk:WaterServices, awk:RegulatedBusiness



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value4954645145-56888580
Percentage of RegulatedAndUnregulatedOperatingRevenue5.86.06.35.85.5-6.69.010.010.5

awk:Residential, awk:WastewaterServices, awk:RegulatedBusiness



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value313131282932292727
Percentage of RegulatedAndUnregulatedOperatingRevenue3.73.43.13.23.63.83.03.23.5

awk:Residential, awk:WaterServices, awk:RegulatedBusiness



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value399438504415378403482410368
Percentage of RegulatedAndUnregulatedOperatingRevenue47.348.649.847.146.547.449.448.148.4

us-gaap:ProductOrService

us-gaap:ServiceOther



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-30
Value-4-6-6-5-6-4-6
Percentage of RegulatedAndUnregulatedOperatingRevenue-0.5-0.7-0.6-0.6-0.7-0.5-0.6

us-gaap:ProductOrService, us-gaap:StatementBusinessSegments

awk:MiscellaneousUtilityCharge, awk:RegulatedBusiness



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value89981012131211
Percentage of RegulatedAndUnregulatedOperatingRevenue0.91.00.90.91.21.41.31.41.4

awk:WastewaterServices, awk:RegulatedBusiness



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value434443404044413838
Percentage of RegulatedAndUnregulatedOperatingRevenue5.14.94.24.54.95.24.24.55.0

awk:WaterServices, awk:RegulatedBusiness



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value659724831688625663793681612
Percentage of RegulatedAndUnregulatedOperatingRevenue78.180.382.078.076.978.081.279.880.4

us-gaap:StatementBusinessSegments

awk:MarketBasedBusinesses



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value128137136132134137125114100
Percentage of RegulatedAndUnregulatedOperatingRevenue15.215.213.415.016.516.112.813.413.1

awk:RegulatedBusiness



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value720771883755685717857744666
Percentage of RegulatedAndUnregulatedOperatingRevenue85.385.587.285.684.384.487.887.287.5

us-gaap:RepaymentsOfConstructionLoansPayable



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-31
Value858892412465741457555745555
Percentage of RepaymentsOfConstructionLoansPayable100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

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

us-gaap:RepaymentsOfDebt

awk:TermLoan, us-gaap:SubsequentEvent, awk:AmericanWaterCapitalCorpAWCC



Period End2020-04-14
Value750
Percentage of RepaymentsOfDebt100.0

awk:UnsecuredRevolvingCreditFacility, us-gaap:SubsequentEvent, awk:AmericanWaterCapitalCorpAWCC



Period End2020-04-14
Value2250
Percentage of RepaymentsOfDebt300.0

us-gaap:DebtInstrumentRedemptionPeriod

us-gaap:DebtInstrumentRedemptionPeriodOne



Period End2020-03-312019-03-312018-03-312017-03-312016-03-31
Value6126411
Percentage of RepaymentsOfDebt0.00.00.00.00.0

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

us-gaap:SeniorNotes, us-gaap:SubsequentEvent, awk:AmericanWaterCapitalCorpAWCC



Period End2020-04-14
Value28
Percentage of RepaymentsOfDebt3.7

us-gaap:StatementEquityComponents

us-gaap:StockIssuedDuringPeriodSharesShareBasedCompensation

us-gaap:CommonStock



Period End2020-03-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-03-312011-03-312010-03-31
Value300000.0200000.0100000.0200000.0100000.0100000.00.0200000.00.0100000.00.0400000.0-100000.0100000.0200000.0500000.0121000.0529000.0123000.0427000.0160000.091000.0124000.0562000.0210000.0140000.0226000.0651000.0192000.0388000.0519000.0304000.040000.0
Percentage of StockIssuedDuringPeriodSharesShareBasedCompensation100.0100.0100.0100.0100.0100.00.0100.00.0100.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:TreasuryStock



Period End2020-03-312019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-03-312011-03-312010-03-31
Value-100000.0-100000.00.00.00.0-100000.00.00.00.0-100000.00.00.00.0-100000.014000.0-1000.0-4000.0-109000.0-7000.00.0-4000.0-118000.00.00.00.0-132000.00.00.0-31000.01000.0-7000.0
Percentage of StockIssuedDuringPeriodSharesShareBasedCompensation-33.3-50.00.00.00.0-50.00.00.00.0-25.0-0.00.00.0-20.011.6-0.2-3.3-25.5-4.40.0-3.2-21.00.00.00.0-20.30.00.0-6.00.3-17.5

us-gaap:StockIssuedDuringPeriodValueShareBasedCompensation



Period End2020-03-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-03-312011-03-312010-03-31
Value36103579-145-3391002263241547593712961
Percentage of StockIssuedDuringPeriodValueShareBasedCompensation100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:StatementEquityComponents

us-gaap:AdditionalPaidInCapital



Period End2020-03-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-03-312011-03-312010-03-31
Value136108571044567-331015022792516985987121162
Percentage of StockIssuedDuringPeriodValueShareBasedCompensation433.3100.0100.0266.7100.0100.0111.1-400.0100.0100.00.00.0100.0100.0111.1150.0110.6101.0109.3267.1130.1104.5102.8221.7102.9103.8102.1234.5106.9102.0112.1101.8112.5

us-gaap:TreasuryStock



Period End2020-03-312019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-03-312011-03-312010-03-31
Value-10-5000-5000-710-1-5000-6000-4000-500-100
Percentage of StockIssuedDuringPeriodValueShareBasedCompensation-333.3-166.70.00.00.0500.00.00.00.00.0-33.30.0-11.1-50.095.1-0.2-3.6-166.0-14.40.0-1.3-117.70.00.00.0-134.50.00.0-10.50.3-6.9

us-gaap:UtilitiesOperatingExpenseDepreciationAndAmortization



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-30
Value145152144142144141141134129114128126124120119115116112111108107105106105
Percentage of UtilitiesOperatingExpenseDepreciationAndAmortization100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ConsolidationItems

us-gaap:CorporateNonSegment



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302014-12-312014-09-302014-06-30
Value46325544342334425345666
Percentage of UtilitiesOperatingExpenseDepreciationAndAmortization2.83.92.11.43.53.52.83.02.33.51.62.42.43.33.41.74.33.54.45.35.75.85.7

us-gaap:ConsolidationItems, us-gaap:StatementBusinessSegments

us-gaap:OperatingSegments, awk:MarketBasedBusinesses



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302014-09-30
Value6119899974554444433211
Percentage of UtilitiesOperatingExpenseDepreciationAndAmortization4.17.26.25.66.26.46.45.23.14.43.93.23.23.33.43.52.63.31.80.91.4

us-gaap:OperatingSegments, awk:RegulatedBusiness



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302014-09-302014-06-30
Value1351351321321301271281231221051211191171121111091081041041029998
Percentage of UtilitiesOperatingExpenseDepreciationAndAmortization93.188.891.793.090.390.190.891.894.692.194.594.494.493.393.394.893.193.193.793.692.892.9

us-gaap:UtilitiesOperatingExpenseMaintenanceAndOperations



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-09-302011-06-302011-03-312010-09-302010-06-302010-03-31
Value383412395372365394390348347368324349337373432351348379363336323345341342329333343323312357355327310345332320346314305
Percentage of UtilitiesOperatingExpenseMaintenanceAndOperations100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:UtilitiesOperatingExpenseTaxes



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-30
Value777168726967716970676163686365646658606064576056
Percentage of UtilitiesOperatingExpenseTaxes100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:WeightedAverageNumberDilutedSharesOutstandingAdjustment



Period End2020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-312017-09-302017-06-302017-03-312016-09-302016-03-312015-09-302015-03-31
Value0.00.00.00.00.00.01000000.01000000.01000000.01000000.00.01000000.01000000.01000000.0
Percentage of WeightedAverageNumberDilutedSharesOutstandingAdjustment0.00.00.00.00.00.0100.0100.0100.0100.00.0100.0100.0100.0

awk:AdvancesforConstruction



Period End2020-03-312019-12-31
Value259240
Percentage of AdvancesforConstruction100.0100.0

awk:DeferredTaxLiabilitiesandInvestmentTaxCreditsNoncurrent



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-31
Value192918931904182317691740
Percentage of DeferredTaxLiabilitiesandInvestmentTaxCreditsNoncurrent100.0100.0100.0100.0100.0100.0

awk:DepositAssetsFairValue



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302014-12-31
Value43338333444343468114
Percentage of DepositAssetsFairValue100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:FairValueByFairValueHierarchyLevel

us-gaap:FairValueInputsLevel1



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302014-12-31
Value43338333444343468114
Percentage of DepositAssetsFairValue100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

awk:IntangibleAssetsNoncurrent



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302017-12-31
Value6415974788084911019
Percentage of IntangibleAssetsNoncurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0

awk:LongTermDebtIncludesRedeemablePreferredStockAtRedemptionValue



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-31
Value862586448646864875687576757763526403649866815659575357595853586158615874
Percentage of LongTermDebtIncludesRedeemablePreferredStockAtRedemptionValue100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

awk:MarkToMarketDerivativeLiabilitiesFairValue



Period End2020-03-31
Value8
Percentage of MarkToMarketDerivativeLiabilitiesFairValue100.0

us-gaap:FairValueByFairValueHierarchyLevel

us-gaap:FairValueInputsLevel1



Period End2020-03-31
Value0.0
Percentage of MarkToMarketDerivativeLiabilitiesFairValue0.0

us-gaap:FairValueInputsLevel2



Period End2020-03-31
Value8
Percentage of MarkToMarketDerivativeLiabilitiesFairValue100.0

us-gaap:FairValueInputsLevel3



Period End2020-03-31
Value0.0
Percentage of MarkToMarketDerivativeLiabilitiesFairValue0.0

awk:OtherInvestmentsFairValueDisclosure



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302015-12-312015-09-302014-12-31
Value108134536353424144422
Percentage of OtherInvestmentsFairValueDisclosure100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:FairValueByFairValueHierarchyLevel

us-gaap:FairValueInputsLevel1



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302015-12-312015-09-302014-12-31
Value108134536353424144422
Percentage of OtherInvestmentsFairValueDisclosure100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:FairValueByMeasurementBasis

awk:PreferredStocksWithMandatoryRedemptionRequirementsCarryingAmount

us-gaap:CarryingReportedAmountFairValueDisclosure



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value67777899910
Percentage of PreferredStocksWithMandatoryRedemptionRequirementsCarryingAmount100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

awk:PrepaidPostRetirementAssetsNoncurrent



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302017-12-31
Value158671501681611551930
Percentage of PrepaidPostRetirementAssetsNoncurrent100.0100.0100.0100.0100.0100.0100.00.0

awk:RabbiTrustInvestments



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302010-12-31
Value16171615151516151515141313121312121211121211000000000000011
Percentage of RabbiTrustInvestments100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:FairValueByFairValueHierarchyLevel

us-gaap:FairValueInputsLevel1



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302012-12-31
Value1617161515151615151514131312131212120000000
Percentage of RabbiTrustInvestments100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.00.00.00.00.00.00.0

us-gaap:FairValueInputsLevel2



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302016-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302010-12-31
Value00000000000011121211000000000000011
Percentage of RabbiTrustInvestments0.00.00.00.00.00.00.00.00.00.00.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

awk:RegulatoryandOtherLongtermLiabilities



Period End2020-03-312019-12-31
Value45494517
Percentage of RegulatoryandOtherLongtermLiabilities100.0100.0

us-gaap:AccruedLiabilitiesCurrent



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312014-12-31
Value476596490429406556455530495630498490453609530377368493395
Percentage of AccruedLiabilitiesCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:AdditionalPaidInCapitalCommonStock



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312009-12-31
Value671367006695668366686657664766376438643264236416640063886388638263686351634863246313630162976290627262616251624362326222621361986192618061736170616461566140
Percentage of AdditionalPaidInCapitalCommonStock100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:AllowanceForDoubtfulAccountsReceivableCurrent



Period End2020-03-312019-12-312011-09-302011-06-302011-03-312010-12-312009-12-31
Value40411716141819
Percentage of AllowanceForDoubtfulAccountsReceivableCurrent100.0100.0100.0100.0100.0100.0100.0

us-gaap:AssetsFairValueDisclosure



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302010-12-31
Value63595445515061595850517282685050504653547064424736363939585111812152667485123
Percentage of AssetsFairValueDisclosure100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:FairValueByFairValueHierarchyLevel

us-gaap:FairValueInputsLevel1



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302010-12-31
Value63595445515056505250514749404948484437385449384231313334504211011347606883122
Percentage of AssetsFairValueDisclosure100.0100.0100.0100.0100.0100.091.884.789.7100.0100.065.359.858.898.096.096.095.771.370.477.176.290.289.486.185.784.886.786.483.692.993.789.090.591.498.098.7

us-gaap:FairValueInputsLevel2



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302010-12-31
Value00000059600253328122215161615445555788756611
Percentage of AssetsFairValueDisclosure0.00.00.00.00.00.08.215.310.30.00.034.740.241.22.04.04.04.328.729.622.923.89.810.613.914.315.213.313.616.47.16.311.09.58.62.01.3

us-gaap:AssetsOfDisposalGroupIncludingDiscontinuedOperation



Period End2020-03-312019-12-312018-12-312016-12-312015-12-312014-12-312014-09-302013-12-312013-09-302012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312009-12-31
Value5795660000678700137929926918917937932
Percentage of AssetsOfDisposalGroupIncludingDiscontinuedOperation100.0100.00.00.00.00.0100.0100.0100.0100.00.00.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:CapitalizationLongtermDebtAndEquity



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312009-12-31
Value1486814765148361467513500134401343712088118541188312199110431104010977110911101410943109231112010500104361036310476101061002599579824977097129654965395489625960196469547953695659317
Percentage of CapitalizationLongtermDebtAndEquity100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ContractWithCustomerAssetNet



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value17139771417151935
Percentage of ContractWithCustomerAssetNet100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ContractWithCustomerLiability



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value34273028232029272925
Percentage of ContractWithCustomerLiability100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ContributionsInAidOfConstruction



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312009-12-31
Value136213551345133713321322131212981287127612641238122512181198118711401121111210981081107410671054104610421015100710029969949889739669519409321016973
Percentage of ContributionsInAidOfConstruction100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:CreditFacility, dei:LegalEntity

us-gaap:DebtInstrumentFaceAmount

us-gaap:RevolvingCreditFacility, awk:AmericanWaterCapitalCorpAWCC



Period End2020-03-31
Value2250
Percentage of DebtInstrumentFaceAmount100.0

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

awk:SeniorNote2.80Due2023, us-gaap:SeniorNotes, us-gaap:SubsequentEvent, awk:AmericanWaterCapitalCorpAWCC



Period End2020-04-14
Value500
Percentage of DebtInstrumentFaceAmount0.0

awk:SeniorNote3.45Due2050, us-gaap:SeniorNotes, us-gaap:SubsequentEvent, awk:AmericanWaterCapitalCorpAWCC



Period End2020-04-14
Value500
Percentage of DebtInstrumentFaceAmount0.0

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

us-gaap:SeniorNotes, us-gaap:SubsequentEvent, awk:AmericanWaterCapitalCorpAWCC



Period End2020-04-14
Value1000
Percentage of DebtInstrumentFaceAmount0.0

dei:LegalEntity

us-gaap:DebtWeightedAverageInterestRate

awk:AmericanWaterCapitalCorpAWCC



Period End2020-03-312019-12-31
Value0.01830.0186
Percentage of DebtWeightedAverageInterestRate100.0100.0

us-gaap:DefinedBenefitPensionPlanLiabilitiesNoncurrent



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312009-12-31
Value4044113993983943903933973903844214224204193423413423423173183173169098103108434435448461375391391411340386392422431
Percentage of DefinedBenefitPensionPlanLiabilitiesNoncurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:BalanceSheetLocation, us-gaap:DerivativeInstrumentsGainLossByHedgingRelationship, us-gaap:FinancialInstrument

us-gaap:DerivativeLiabilities

us-gaap:OtherCurrentLiabilities, us-gaap:CashFlowHedging, us-gaap:TreasuryLock



Period End2020-03-312019-12-31
Value80
Percentage of DerivativeLiabilities100.00.0

us-gaap:FairValueLiabilitiesMeasuredOnRecurringBasisObligations



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302010-12-31
Value2021201919171817171716151513131211111011111111111111101010109999899
Percentage of FairValueLiabilitiesMeasuredOnRecurringBasisObligations100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:FairValueByFairValueHierarchyLevel

us-gaap:FairValueInputsLevel1



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302012-12-31
Value2021201919171817171716151513131211110000000
Percentage of FairValueLiabilitiesMeasuredOnRecurringBasisObligations100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.00.00.00.00.00.00.0

us-gaap:FairValueInputsLevel2



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302016-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302010-12-31
Value0000000000001011111111111111101010109999899
Percentage of FairValueLiabilitiesMeasuredOnRecurringBasisObligations0.00.00.00.00.00.00.00.00.00.00.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:FairValueNetAssetLiability



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302014-12-31
Value35383426-2194339413033576755111936344151
Percentage of FairValueNetAssetLiability100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:FairValueByFairValueHierarchyLevel

us-gaap:FairValueInputsLevel1



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302014-12-31
Value4338342632333833353335323427363637333749
Percentage of FairValueNetAssetLiability122.9100.0100.0100.0-1600.0173.788.484.685.4110.0106.156.150.749.1327.3189.5102.897.191.195.0

us-gaap:FairValueInputsLevel2



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302014-12-31
Value-8000-34-14566-3-2253328-25-17-1132
Percentage of FairValueNetAssetLiability-22.90.00.00.01700.0-73.711.615.414.6-10.0-6.143.949.350.9-227.3-89.5-2.82.98.95.0

us-gaap:InterestPayableCurrent



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312009-12-31
Value91849688838789698473103621016396619662975594569755935210154101531065710359103591036060
Percentage of InterestPayableCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:LiabilitiesFairValueDisclosure



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302010-12-31
Value28212019533118201720181515133931141211121212121212131010101099998910
Percentage of LiabilitiesFairValueDisclosure100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:FairValueByFairValueHierarchyLevel

us-gaap:FairValueInputsLevel1



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302012-12-31
Value2021201919171817171716151513131211110000000
Percentage of LiabilitiesFairValueDisclosure71.4100.0100.0100.035.854.8100.085.0100.085.088.9100.0100.0100.033.338.778.691.70.00.00.00.00.00.00.0

us-gaap:FairValueInputsLevel2



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302010-12-31
Value8000341403032026193111121212121212131010101099998910
Percentage of LiabilitiesFairValueDisclosure28.60.00.00.064.245.20.015.00.015.011.10.066.761.321.48.3100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:LiabilitiesOfDisposalGroupIncludingDiscontinuedOperation



Period End2020-03-312019-12-312018-12-312016-12-312015-12-312014-12-31
Value1301280000
Percentage of LiabilitiesOfDisposalGroupIncludingDiscontinuedOperation100.0100.00.00.00.00.0

us-gaap:LongTermDebtAndCapitalLeaseObligations



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312013-12-31
Value86218639864086427562756975706345639664906672565057445749584258505850586259405433542854325212
Percentage of LongTermDebtAndCapitalLeaseObligations100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:LongTermDebtAndCapitalLeaseObligationsCurrent



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312013-12-31
Value492829256871263364421322687686574574535454542261616114
Percentage of LongTermDebtAndCapitalLeaseObligationsCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FairValueByMeasurementBasis

us-gaap:LongTermDebtFairValue

us-gaap:FairValueInputsLevel1, us-gaap:EstimateOfFairValueFairValueDisclosure



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-31
Value74567689771774366061576057984529463048465375400739723876
Percentage of LongTermDebtFairValue100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:FairValueInputsLevel2, us-gaap:EstimateOfFairValueFairValueDisclosure



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-31
Value404417416415436433624839959976990134813631363
Percentage of LongTermDebtFairValue5.45.45.45.67.27.510.818.520.720.118.433.634.335.2

us-gaap:FairValueInputsLevel3, us-gaap:EstimateOfFairValueFairValueDisclosure



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-31
Value16161664166416501780172817031739178218211867184718221805
Percentage of LongTermDebtFairValue21.721.621.622.229.430.029.438.438.537.634.746.145.946.6

us-gaap:FairValueByMeasurementBasis

us-gaap:EstimateOfFairValueFairValueDisclosure



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-31
Value94769770979795018277792181257107737176438232720271577044
Percentage of LongTermDebtFairValue127.1127.1127.0127.8136.6137.5140.1156.9159.2157.7153.2179.7180.2181.7

us-gaap:LossContingencyAccrualAtCarryingValue



Period End2020-03-312019-09-302019-06-302019-03-31
Value12202128
Percentage of LossContingencyAccrualAtCarryingValue100.0100.0100.0100.0

us-gaap:LitigationCase

awk:BindingAgreement



Period End2020-03-312019-09-302019-06-302019-03-31
Value05715
Percentage of LossContingencyAccrualAtCarryingValue4.225.033.353.6

us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FairValueByMeasurementBasis

us-gaap:MandatorilyRedeemablePreferredStockFairValueDisclosure

us-gaap:FairValueInputsLevel3, us-gaap:EstimateOfFairValueFairValueDisclosure



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-31
Value79109991111121415141415
Percentage of MandatorilyRedeemablePreferredStockFairValueDisclosure100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:FairValueByMeasurementBasis

us-gaap:EstimateOfFairValueFairValueDisclosure



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-31
Value79109991111121415141415
Percentage of MandatorilyRedeemablePreferredStockFairValueDisclosure100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OperatingLeaseLiabilityNoncurrent



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-31
Value878994971010
Percentage of OperatingLeaseLiabilityNoncurrent100.0100.0100.0100.0100.00.0

us-gaap:PreferredStockRedemptionAmount



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302015-12-312011-03-312010-12-312009-12-31
Value456667777899910111112232323
Percentage of PreferredStockRedemptionAmount100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:RegulatedEntityOtherAssetsNoncurrent



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-31
Value31573165328833153150303330172861252225162820276727152706261126982681265126202484243524402159213621162127
Percentage of RegulatedEntityOtherAssetsNoncurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:RegulatoryAssetsNoncurrent



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312009-12-31
Value1132112811781180116111561086106910621061137413241298128912231306128912711230119511511153874848847858123212231207119911341139109010799979899911016952
Percentage of RegulatoryAssetsNoncurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:RegulatoryLiabilityNoncurrent



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312009-12-31
Value1795180618491886189119071962171316731664408410404403403406407402395395386391385382380373380375370364355352332325309301299303322
Percentage of RegulatoryLiabilityNoncurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:RestrictedCashAndCashEquivalents



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302010-12-31
Value33312223232931292828292928242830282732365045374129292632384010811145576682120
Percentage of RestrictedCashAndCashEquivalents100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:FairValueByFairValueHierarchyLevel

us-gaap:FairValueInputsLevel1



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302010-12-31
Value33312223232931292828292928242830282732365045374129292632384010811145576682120
Percentage of RestrictedCashAndCashEquivalents100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:RestrictedCashAndCashEquivalentsAtCarryingValue



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312009-12-31
Value333122222228292726272828232023232221232021132021282825193129879827324665809441
Percentage of RestrictedCashAndCashEquivalentsAtCarryingValue100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:RestrictedCashAndCashEquivalentsNoncurrent



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312009-12-31
Value000111121111448888171900012710211317251917202620
Percentage of RestrictedCashAndCashEquivalentsNoncurrent0.00.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:MajorCustomers, us-gaap:StatementBusinessSegments

us-gaap:RevenueRemainingPerformanceObligation

awk:MunicipalitiesandCommercial, awk:MarketBasedBusinesses



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value537547559571585596612686690
Percentage of RevenueRemainingPerformanceObligation100.0100.0100.0100.0100.0100.0100.0100.0100.0

awk:U.S.Government, awk:MarketBasedBusinesses



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value540054005400440044004400440038003800
Percentage of RevenueRemainingPerformanceObligation1005.6987.2966.0770.6752.1738.3719.0553.9550.7

us-gaap:ShortTermBorrowings



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312009-12-31
Value16417864743971201964564164911839051031117980849951950839628379820544449313702638630389466333269297361147515408449323229119
Percentage of ShortTermBorrowings100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

dei:LegalEntity

awk:AmericanWaterCapitalCorpAWCC



Period End2020-03-31
Value215
Percentage of ShortTermBorrowings13.1

us-gaap:TreasuryStockShares



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312014-12-31
Value5555544444444333320
Percentage of TreasuryStockShares100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:UnbilledReceivablesCurrent



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302010-12-31
Value172172187179170186203212188212234236227263285286247267289265222220227224193217209196170180151161127134142145132
Percentage of UnbilledReceivablesCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Line plots across dimensions of each concept

us-gaap:SharesOutstanding us-gaap:StatementEquityComponents


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


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


us-gaap:RevenueFromContractWithCustomerIncludingAssessedTax us-gaap:StatementBusinessSegments


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


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


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


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


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


us-gaap:StockholdersEquity us-gaap:StatementEquityComponents


us-gaap:StockholdersEquity us-gaap:StatementEquityComponents


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


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