WMB


Line plots across dimensions of each concept
Tables

Table of contents



us-gaap:CommonStockValue

us-gaap:CommonStockSharesIssued

us-gaap:CommonStockSharesAuthorized

us-gaap:EarningsPerShareBasic

us-gaap:EarningsPerShareDiluted

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

us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax
us-gaap:ProductOrService
us-gaap:ProductOrService
us-gaap:CostOfGoodsAndServiceExcludingDepreciationDepletionAndAmortization

us-gaap:OperatingCostsAndExpenses

us-gaap:CostsAndExpenses

us-gaap:SellingGeneralAndAdministrativeExpense

us-gaap:OperatingIncomeLoss

us-gaap:InterestExpense

us-gaap:OtherNonoperatingIncomeExpense

us-gaap:IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest

us-gaap:IncomeTaxExpenseBenefit

us-gaap:ProfitLoss
us-gaap:StatementEquityComponents

us-gaap:ComprehensiveIncomeNetOfTax

us-gaap:ComprehensiveIncomeNetOfTaxAttributableToNoncontrollingInterest

us-gaap:ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest

us-gaap:NetIncomeLoss

us-gaap:NetIncomeLossAvailableToCommonStockholdersBasic

us-gaap:NetIncomeLossAttributableToNoncontrollingInterest

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

us-gaap:LiabilitiesAndStockholdersEquity

us-gaap:StockholdersEquity

us-gaap:AssetsCurrent

us-gaap:CashAndCashEquivalentsAtCarryingValue

us-gaap:ReceivablesNetCurrent
us-gaap:MajorCustomers, us-gaap:ConcentrationRiskByBenchmark, us-gaap:ConcentrationRiskByType
us-gaap:ProductOrService

us-gaap:InventoryNet

us-gaap:OtherAssetsCurrent

us-gaap:PropertyPlantAndEquipmentGross
us-gaap:PropertyPlantAndEquipmentByType, us-gaap:PublicUtilityRegulatedOrUnregulatedStatus

us-gaap:AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment

us-gaap:PropertyPlantAndEquipmentNet

us-gaap:Goodwill
us-gaap:StatementBusinessSegments

us-gaap:IntangibleAssetsNetIncludingGoodwill

us-gaap:OtherAssetsNoncurrent

us-gaap:LiabilitiesCurrent

us-gaap:AccountsPayableCurrent

us-gaap:OtherAccruedLiabilitiesCurrent
us-gaap:RetirementPlanType
us-gaap:PensionAndOtherPostretirementDefinedBenefitPlansLiabilitiesNoncurrent

us-gaap:MinorityInterest

us-gaap:StockholdersEquity

us-gaap:CommonStockValue

us-gaap:RetainedEarningsAccumulatedDeficit

us-gaap:AccumulatedOtherComprehensiveIncomeLossNetOfTax
us-gaap:StatementEquityComponents

us-gaap:NetCashProvidedByUsedInOperatingActivities

us-gaap:NetCashProvidedByUsedInInvestingActivities

us-gaap:NetCashProvidedByUsedInFinancingActivities

us-gaap:NetCashProvidedByUsedInOperatingActivities

us-gaap:NetIncomeLoss

us-gaap:ProfitLoss
us-gaap:StatementEquityComponents

us-gaap:DepreciationDepletionAndAmortization

us-gaap:IncreaseDecreaseInInventories

us-gaap:NetCashProvidedByUsedInInvestingActivities

us-gaap:PaymentsToAcquirePropertyPlantAndEquipment

us-gaap:NetCashProvidedByUsedInFinancingActivities

us-gaap:ProceedsFromIssuanceOfLongTermDebt

us-gaap:RepaymentsOfLongTermDebt

us-gaap:RepaymentsOfLongTermDebt
us-gaap:DebtInstrument, dei:LegalEntity
us-gaap:DebtInstrumentInterestRateStatedPercentage
us-gaap:DebtInstrument, us-gaap:SubsequentEventType, dei:LegalEntity
us-gaap:AwardType, us-gaap:PlanName
us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber
us-gaap:AwardType, us-gaap:PlanName
us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice

us-gaap:ShareBasedCompensation

us-gaap:DeferredTaxLiabilities

us-gaap:DeferredTaxAssetsNet

us-gaap:UnrecognizedTaxBenefits

us-gaap:DeferredTaxAssetsValuationAllowance

us-gaap:OperatingLeaseRightOfUseAsset

us-gaap:CashAndCashEquivalentsPeriodIncreaseDecrease
us-gaap:IncomeStatementLocation, us-gaap:StatementBusinessSegments
us-gaap:AmortizationOfRegulatoryAsset

us-gaap:AssetImpairmentCharges
us-gaap:IncomeStatementLocation, us-gaap:StatementBusinessSegments
us-gaap:AssetRetirementObligationRevisionOfEstimate
us-gaap:StatementScenario, us-gaap:BusinessAcquisition
us-gaap:BusinessAcquisitionsProFormaNetIncomeLoss
us-gaap:StatementScenario, us-gaap:BusinessAcquisition
us-gaap:BusinessAcquisitionsProFormaRevenue

us-gaap:CommonStockDividendsPerShareDeclared
us-gaap:SubsequentEventType

us-gaap:ConsolidationLessThanWhollyOwnedSubsidiaryParentOwnershipInterestChangesNet
us-gaap:StatementEquityComponents
us-gaap:StatementEquityComponents, dei:LegalEntity

us-gaap:ContractWithCustomerAssetCumulativeCatchUpAdjustmentToRevenueChangeInMeasureOfProgress

us-gaap:ContractWithCustomerAssetReclassifiedToReceivable

us-gaap:ContractWithCustomerLiabilityCumulativeCatchUpAdjustmentToRevenueChangeInMeasureOfProgress

us-gaap:ContractWithCustomerLiabilityRevenueRecognized

us-gaap:CurrentFederalTaxExpenseBenefit

us-gaap:CurrentForeignTaxExpenseBenefit

us-gaap:CurrentIncomeTaxExpenseBenefit

us-gaap:CurrentStateAndLocalTaxExpenseBenefit

us-gaap:DeconsolidationRevaluationOfRetainedInvestmentGainOrLossAmount
us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName

us-gaap:DeferredFederalIncomeTaxExpenseBenefit

us-gaap:DeferredIncomeTaxExpenseBenefit

us-gaap:DeferredStateAndLocalIncomeTaxExpenseBenefit
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:DefinedBenefitPlanRecognizedNetGainLossDueToSettlements1
us-gaap:RetirementPlanType
us-gaap:DefinedBenefitPlanServiceCost

us-gaap:DividendsCommonStockCash
us-gaap:StatementEquityComponents

us-gaap:EquityMethodInvestmentDividendsOrDistributions

us-gaap:EquityMethodInvestmentOtherThanTemporaryImpairment
us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FairValueByMeasurementFrequency, us-gaap:IncomeStatementLocation

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

us-gaap:IncomeLossFromEquityMethodInvestments

us-gaap:IncreaseDecreaseInAccountsAndNotesReceivable

us-gaap:IncreaseDecreaseInAccountsPayable

us-gaap:IncreaseDecreaseInAccruedLiabilities
dei:LegalEntity
us-gaap:IncreaseDecreaseInDeferredIncomeTaxes

us-gaap:IncreaseDecreaseInOtherCurrentAssets

us-gaap:InterestCostsCapitalizedAdjustment

us-gaap:InterestCostsIncurred

us-gaap:InvestmentIncomeNonoperating
us-gaap:IncomeStatementLocation

us-gaap:MinorityInterestDecreaseFromDistributionsToNoncontrollingInterestHolders
us-gaap:StatementEquityComponents
dei:LegalEntity
us-gaap:OtherAssetImpairmentCharges
us-gaap:BalanceSheetLocation, dei:LegalEntity

us-gaap:OtherComprehensiveIncomeDefinedBenefitPlansNetUnamortizedGainLossArisingDuringPeriodNetOfTax

us-gaap:OtherComprehensiveIncomeDefinedBenefitPlansNetUnamortizedGainLossArisingDuringPeriodTax
us-gaap:StatementEquityComponents
us-gaap:OtherComprehensiveIncomeLossBeforeReclassificationsNetOfTax

us-gaap:OtherComprehensiveIncomeLossCashFlowHedgeGainLossBeforeReclassificationAfterTax

us-gaap:OtherComprehensiveIncomeLossCashFlowHedgeGainLossBeforeReclassificationTax

us-gaap:OtherComprehensiveIncomeLossCashFlowHedgeGainLossReclassificationAfterTax

us-gaap:OtherComprehensiveIncomeLossCashFlowHedgeGainLossReclassificationTax

us-gaap:OtherComprehensiveIncomeLossNetOfTax
us-gaap:StatementEquityComponents

us-gaap:OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetGainLossNetOfTax

us-gaap:OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetGainLossTax

us-gaap:OtherOperatingActivitiesCashFlowStatement

us-gaap:OtherOperatingIncomeExpenseNet

us-gaap:PaymentsForProceedsFromOtherInvestingActivities

us-gaap:PaymentsForProceedsFromProductiveAssets

us-gaap:PaymentsOfDebtIssuanceCosts

us-gaap:PaymentsOfDividendsCommonStock

us-gaap:PaymentsOfDividendsMinorityInterest

us-gaap:PaymentsToAcquireBusinessesNetOfCashAcquired

us-gaap:PaymentsToAcquireEquityMethodInvestments

us-gaap:PreferredStockDividendsIncomeStatementImpact

us-gaap:ProceedsFromContributionInAidOfConstruction

us-gaap:ProceedsFromDivestitureOfInterestInConsolidatedSubsidiaries

us-gaap:ProceedsFromIssuanceOfCommonStock

us-gaap:ProceedsFromMinorityShareholders

us-gaap:ProceedsFromPaymentsForOtherFinancingActivities

us-gaap:ProceedsFromRepaymentsOfCommercialPaper

us-gaap:ProceedsFromSaleOfEquityMethodInvestments

us-gaap:PropertyPlantAndEquipmentAdditions
us-gaap:IncomeStatementLocation, us-gaap:StatementBusinessSegments
us-gaap:PublicUtilitiesAllowanceForFundsUsedDuringConstructionCapitalizedCostOfEquity
us-gaap:StatementEquityComponents
us-gaap:ReclassificationFromAccumulatedOtherComprehensiveIncomeCurrentPeriodNetOfTax

us-gaap:RevenueNotFromContractWithCustomer

us-gaap:StockIssuedDuringPeriodValueShareBasedCompensation
us-gaap:StatementEquityComponents

us-gaap:StockholdersEquityOther
us-gaap:StatementEquityComponents

us-gaap:StockholdersEquityPeriodIncreaseDecrease
us-gaap:StatementEquityComponents
us-gaap:RealEstateAndAccumulatedDepreciationDescriptionOfProperty, us-gaap:StatementBusinessSegments
us-gaap:SubsidiaryOfLimitedLiabilityCompanyOrLimitedPartnershipOwnershipInterest
us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FairValueByMeasurementFrequency, us-gaap:IncomeStatementLocation, us-gaap:StatementBusinessSegments
us-gaap:TangibleAssetImpairmentCharges
us-gaap:IncomeStatementLocation, us-gaap:StatementBusinessSegments
wmb:AccrualOfRegulatoryLiability

wmb:AssetRetirementObligationAccretionExpenseForNonregulatedOperations

wmb:ContractLiabilityNoncashInterestExpenseSignificantFinancingObligation

wmb:ContributionsFromNoncontrollingInterests
us-gaap:StatementEquityComponents

wmb:IncreaseDecreaseInAccountsPayableAndAccruedLiabilitiesRelatedToCapitalExpendituresIncurredButNotYetPaid
us-gaap:RetirementPlanType
wmb:ReclassificationOfEmployeeBenefitCostCreditToRegulatoryAssetLiability
us-gaap:IncomeStatementLocation, us-gaap:StatementBusinessSegments
wmb:RegulatoryBenefitResultingFromTaxRateChange
us-gaap:IncomeStatementLocation, us-gaap:StatementBusinessSegments
wmb:RegulatoryChargeResultingFromTaxRateChange
us-gaap:IncomeStatementLocation, us-gaap:StatementBusinessSegments
wmb:RegulatoryChargesInOperatingExpenseResultingFromTaxReform
us-gaap:RelatedPartyTransaction
us-gaap:AccountsPayableRelatedPartiesCurrent

us-gaap:AccrualForEnvironmentalLossContingencies
us-gaap:LossContingenciesByNatureOfContingency

us-gaap:AccruedLiabilitiesCurrent

us-gaap:AdditionalPaidInCapitalCommonStock

us-gaap:AllowanceForDoubtfulAccountsReceivableCurrent

us-gaap:AssetRetirementObligation

us-gaap:AssetRetirementObligationCurrent
us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FairValueByMeasurementFrequency
us-gaap:AssetRetirementObligationLegallyRestrictedAssetsFairValue
us-gaap:FairValueByMeasurementBasis, us-gaap:FairValueByMeasurementFrequency

us-gaap:AssetRetirementObligationsNoncurrent

us-gaap:ContractWithCustomerAssetNet

us-gaap:ContractWithCustomerLiability

us-gaap:CustomerRefundLiabilityCurrent

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

us-gaap:DebtInstrumentUnamortizedDiscountPremiumNet
us-gaap:IncomeStatementLocation, us-gaap:StatementBusinessSegments

us-gaap:DeferredIncomeTaxLiabilities

us-gaap:DeferredRevenueCurrent

us-gaap:DeferredTaxAndOtherLiabilitiesNoncurrent

us-gaap:DeferredTaxAssetsGross

us-gaap:DeferredTaxAssetsOperatingLossCarryforwardsDomestic

us-gaap:DeferredTaxAssetsOperatingLossCarryforwardsStateAndLocal

us-gaap:DeferredTaxAssetsOther
us-gaap:IncomeTaxAuthority, us-gaap:TaxCreditCarryforward
us-gaap:DeferredTaxAssetsTaxCreditCarryforwards

us-gaap:DeferredTaxAssetsTaxCreditCarryforwardsAlternativeMinimumTax

us-gaap:DeferredTaxAssetsTaxCreditCarryforwardsForeign

us-gaap:DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsAccruedLiabilities

us-gaap:DeferredTaxLiabilitiesInvestmentInNoncontrolledAffiliates

us-gaap:DeferredTaxLiabilitiesOther

us-gaap:DeferredTaxLiabilitiesPropertyPlantAndEquipment
us-gaap:RetirementPlanType
us-gaap:DefinedBenefitPlanAccumulatedBenefitObligation
us-gaap:RetirementPlanType
us-gaap:DefinedBenefitPlanAccumulatedOtherComprehensiveIncomeNetGainsLossesBeforeTax
us-gaap:RetirementPlanType
us-gaap:DefinedBenefitPlanAssetsForPlanBenefitsNoncurrent
us-gaap:RetirementPlanType
us-gaap:DefinedBenefitPlanAssumptionsUsedCalculatingBenefitObligationDiscountRate
us-gaap:RetirementPlanType
us-gaap:DefinedBenefitPlanAssumptionsUsedCalculatingBenefitObligationRateOfCompensationIncrease
us-gaap:RetirementPlanType
us-gaap:DefinedBenefitPlanAssumptionsUsedCalculatingBenefitObligationWeightedAverageInterestCreditingRate
us-gaap:RetirementPlanType
us-gaap:DefinedBenefitPlanBenefitObligation
us-gaap:RetirementPlanType
us-gaap:DefinedBenefitPlanExpectedFutureBenefitPaymentsFiveFiscalYearsThereafter
us-gaap:RetirementPlanType
us-gaap:DefinedBenefitPlanExpectedFutureBenefitPaymentsNextTwelveMonths
us-gaap:RetirementPlanType
us-gaap:DefinedBenefitPlanExpectedFutureBenefitPaymentsYearFive
us-gaap:RetirementPlanType
us-gaap:DefinedBenefitPlanExpectedFutureBenefitPaymentsYearFour
us-gaap:RetirementPlanType
us-gaap:DefinedBenefitPlanExpectedFutureBenefitPaymentsYearThree
us-gaap:RetirementPlanType
us-gaap:DefinedBenefitPlanExpectedFutureBenefitPaymentsYearTwo
us-gaap:RetirementPlanType
us-gaap:DefinedBenefitPlanExpectedFutureEmployerContributionsNextFiscalYear
us-gaap:DefinedBenefitPlanByPlanAssetCategories, us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:RetirementPlanType
us-gaap:DefinedBenefitPlanFairValueOfPlanAssets
us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:RetirementPlanType
us-gaap:RetirementPlanType
us-gaap:RetirementPlanType
us-gaap:DefinedBenefitPlanFundedStatusOfPlan
us-gaap:RetirementPlanType
us-gaap:DefinedBenefitPlanPensionPlanWithProjectedBenefitObligationInExcessOfPlanAssetsPlanAssets
us-gaap:RetirementPlanType
us-gaap:DefinedBenefitPlanPensionPlanWithProjectedBenefitObligationInExcessOfPlanAssetsProjectedBenefitObligation
us-gaap:RetirementPlanType
us-gaap:DefinedBenefitPlanPensionPlansWithAccumulatedBenefitObligationsInExcessOfPlanAssetsAggregateAccumulatedBenefitObligation
us-gaap:RetirementPlanType
us-gaap:DefinedBenefitPlanPensionPlansWithAccumulatedBenefitObligationsInExcessOfPlanAssetsAggregateFairValueOfPlanAssets
us-gaap:DefinedBenefitPlanByPlanAssetCategories, us-gaap:RetirementPlanType
us-gaap:DefinedBenefitPlanPlanAssetsTargetAllocationPercentage
us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FairValueByMeasurementFrequency, us-gaap:HedgingDesignation
us-gaap:DerivativeFairValueOfDerivativeAsset
us-gaap:FairValueByMeasurementBasis, us-gaap:FairValueByMeasurementFrequency, us-gaap:HedgingDesignation
us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FairValueByMeasurementFrequency, us-gaap:HedgingDesignation
us-gaap:DerivativeFairValueOfDerivativeLiability
us-gaap:FairValueByMeasurementBasis, us-gaap:FairValueByMeasurementFrequency, us-gaap:HedgingDesignation

us-gaap:EmployeeRelatedLiabilitiesCurrent

us-gaap:EquityMethodInvestmentDifferenceBetweenCarryingAmountAndUnderlyingEquity
us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName
us-gaap:EquityMethodInvestmentOwnershipPercentage
us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName, us-gaap:StatementBusinessSegments

us-gaap:EquityMethodInvestmentSummarizedFinancialInformationCurrentAssets

us-gaap:EquityMethodInvestmentSummarizedFinancialInformationCurrentLiabilities

us-gaap:EquityMethodInvestmentSummarizedFinancialInformationNoncurrentAssets

us-gaap:EquityMethodInvestmentSummarizedFinancialInformationNoncurrentLiabilities

us-gaap:EquityMethodInvestments
us-gaap:ConsolidationItems, us-gaap:StatementBusinessSegments
us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName
us-gaap:FiniteLivedIntangibleAssetsByMajorClass
us-gaap:FiniteLivedIntangibleAssetsAccumulatedAmortization
us-gaap:FiniteLivedIntangibleAssetsByMajorClass
us-gaap:FiniteLivedIntangibleAssetsGross
us-gaap:FairValueByFairValueHierarchyLevel
us-gaap:GuaranteesFairValueDisclosure
us-gaap:FairValueByMeasurementBasis

us-gaap:InterestPayableCurrent
dei:LegalEntity
us-gaap:LineOfCredit
dei:LegalEntity
us-gaap:LineOfCreditFacilityMaximumBorrowingCapacity

us-gaap:LongTermDebtAndCapitalLeaseObligations

us-gaap:LongTermDebtAndCapitalLeaseObligationsCurrent
us-gaap:FairValueByFairValueHierarchyLevel
us-gaap:LongTermDebtFairValue
us-gaap:FairValueByMeasurementBasis
us-gaap:RetirementPlanType
us-gaap:NetRegulatoryAssets

us-gaap:OperatingLeaseLiability

us-gaap:OperatingLeaseLiabilityCurrent

us-gaap:OtherLiabilitiesAndDeferredRevenueNoncurrent
us-gaap:DebtInstrument, dei:LegalEntity
us-gaap:OtherLongTermDebt
us-gaap:RetirementPlanType
us-gaap:PensionAndOtherPostretirementDefinedBenefitPlansCurrentLiabilities

us-gaap:PreferredStockValue
us-gaap:BalanceSheetLocation, us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FairValueByMeasurementFrequency, us-gaap:StatementBusinessSegments
us-gaap:PropertyPlantAndEquipmentFairValueDisclosure
us-gaap:PropertyPlantAndEquipmentByType, us-gaap:PublicUtilityRegulatedOrUnregulatedStatus
us-gaap:PublicUtilitiesPropertyPlantAndEquipmentPlantAcquisitionAdjustmentsForIntangibleUtilityPlants

us-gaap:RegulatoryAssets

us-gaap:RegulatoryAssetsCurrent

us-gaap:RegulatoryAssetsNoncurrent

us-gaap:RegulatoryLiabilities

us-gaap:RegulatoryLiabilityCurrent

us-gaap:RegulatoryLiabilityNoncurrent
wmb:PerformanceObligationSource
us-gaap:RevenueRemainingPerformanceObligation
us-gaap:AwardType, us-gaap:PlanName
us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber
us-gaap:AwardType, us-gaap:PlanName
us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue
us-gaap:PlanName
us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAuthorized
us-gaap:PlanName
us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAvailableForGrant

us-gaap:StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest
us-gaap:StatementEquityComponents

us-gaap:UnamortizedDebtIssuanceExpense

us-gaap:UnrecognizedTaxBenefitsIncomeTaxPenaltiesAndInterestAccrued

us-gaap:UnrecognizedTaxBenefitsThatWouldImpactEffectiveTaxRate
us-gaap:ValuationAllowancesAndReservesType
us-gaap:ValuationAllowancesAndReservesBalance
us-gaap:BalanceSheetLocation, us-gaap:VariableInterestEntitiesByClassificationOfEntity
us-gaap:VariableInterestEntityConsolidatedCarryingAmountAssets
us-gaap:BalanceSheetLocation, us-gaap:VariableInterestEntitiesByClassificationOfEntity
us-gaap:VariableInterestEntityConsolidatedCarryingAmountLiabilities
us-gaap:RetirementPlanType
wmb:AmountsIncludedInNetRegulatoryLiabilitiesAssetsAssociatedWithOurFederalEnergyRegulatoryCommissionRegulatedGasPipelinesNetActuarialGainLoss

Tables

  2019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-09-302009-03-31
us-gaap:CommonStockValue ██████▄▄▄▄▄▄▃▃▃▃▃▃▃▃▃▃▃▂▂▂▂▂▁▁▁▁▁▁▁▁▁124712471246124612451245862862861861861861785785785785784784784783782782782720718718717716662661630626623623622620619NA619NANA
us-gaap:CommonStockSharesIssued ██████▄▄▄▄▄▄▃▃▃▃▃▃▃▃▃▃▃▂▂▂▂▂▁▁▁▁▁▁▁▁▁124712471246124612451245862862861861861861785785785785784784784783782782782720718718717716662661630626623623622620619NA619NANA
us-gaap:CommonStockSharesAuthorized ██████▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁147014701470147014701470960960960960960960960960960960960960960960960960960960NA960960960960960960960960960960960960NA960NANA
us-gaap:EarningsPerShareBasic ▅▅▅▅▃▅▅▅█▄▅▅▄▅▄▄▃▄▅▅▅█▅▅▅▅▅▅▅▅▆▃▅▅▅▅▁▅▄▅▄0.099999999999999980.180.260.16-0.630.130.160.182.040.040.10.45-0.0199999999999999070.08-0.54-0.09-0.95-0.050.150.090.239999999999999772.240.150.20.210.210.240.229999999999999980.250.210.71-0.74999999999999990.460.390.550.29000000000000004-2.160.32-0.330.24-0.3
us-gaap:EarningsPerShareDiluted ▅▅▅▅▃▅▅▅█▅▅▅▄▅▄▄▃▄▅▅▅█▅▅▅▅▅▅▅▅▆▃▅▅▅▅▁▅▄▅▄0.099999999999999980.180.260.16-0.620.130.160.182.03000000000000020.040.10.45-0.0199999999999999070.08-0.54-0.09-0.95-0.050.150.090.239999999999999772.220.150.20.20.210.230.22000000000000020.250.210.7-0.74000000000000010.460.380.540.29000000000000004-2.160.31-0.330.24-0.29
  2019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-09-302009-03-31
us-gaap:Revenues ▆▆▆▆▇▇▆▆▇▆▆▆▇▆▆▅▆▆▆▅▇▆▅▆▅▆▆▆▆▆▆▁███▇▇▇█▆▆2107199920412054220423032091208822281891192419882198190517361660200617991839171621412069167817491623176718101869175218462019-17270326692575242423042289259620981922
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  2019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-09-302009-03-31
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  2019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-09-302009-03-31
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  2019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-09-302009-03-31
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  2019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-09-302009-03-31
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us-gaap:OtherAccruedLiabilitiesCurrent 346NANANA371NANANA221NANANA356NANANA279NANANA342NANANANANANA275NANANA271NANANA309NANANANANA
  2019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-09-302009-03-31
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  2019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-09-302009-03-31
us-gaap:StockholdersEquity ▇▇▇▇██▅▅▅▄▄▄▂▃▃▃▃▄▄▄▅▅▄▂▃▂▃▂▂▂▁▁▄▄▄▄▄1336313621138481440614660156109345947396568109830684444643486048305691614873877928821287779129786346164948469447954752309229611940179379097716753772887025NA7573NANA
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us-gaap:RetainedEarningsAccumulatedDeficit ▁▁▁▁▂▂▂▃▃▂▂▂▂▂▂▃▃▄▄▄▄▅▄▄▄▄▄▄▄▄▄▄█████-11002-10664-10423-10270-10002-9018-8735-8587-8434-9872-9654-9487-9649-9483-9394-8508-7960-6764-6243-5914-5548-5315-6574-6385-5973-5863-5765-5695-5648-5607-5551-582033-122-230-478-578NA646NANA
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  2019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-09-302009-03-31
us-gaap:NetCashProvidedByUsedInOperatingActivities ▅▄▅▄▅▃▄▃▃▂▃▃█▃▃▄▃▃▄▃▅▁▁▂991858106977596274689169471956966260615826186857795926038146691011345313446NA6684955464314244341087668873811710644NA617NA512
us-gaap:NetCashProvidedByUsedInInvestingActivities ▆▆▇▆▇▆▆▆▆█▆▇▇▇▆▆▆▆▆▆▆▆▁▆-483-920-166-1258258-1314-871-798-4231566-388-122-16346-400-346-592-705-1246-756-1147-1074-6944-992NA-918-808-3241-790-2399-491-1015-789-620-579-1824-1539NA-435NA-621
us-gaap:NetCashProvidedByUsedInFinancingActivities ▃▃▃▃▂▃▂▄▃▁▄▃▂▂▃▃▃▃▃▃▃▃█▄-466-497-140358-1094335-1037497-569-28811005-15-1473-1036-300-369-2523295188741716427929NA37217625386761554268-179-49-10-104894309NA-405NA456
  2019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-09-302009-03-31
us-gaap:NetCashProvidedByUsedInOperatingActivities ▅▄▅▄▅▃▄▃▃▂▃▃█▃▃▄▃▃▄▃▅▁▁▂991858106977596274689169471956966260615826186857795926038146691011345313446NA6684955464314244341087668873811710644NA617NA512
us-gaap:NetIncomeLoss ▄▅▅▄▃▄▄▄█▄▄▅▄▄▃▄▂▄▄▄▄█▄▄▄▄▄▄▄▄▅▃▅▅▅▄▁▄▄▄▄124221310195-57112913515216873381373-1561-405-65-715-40114701931678103140141142161149155132423-444272227321174-1263185-193143-172
us-gaap:ProfitLoss ▄▅▅▅▃▅▅▅█▄▅▅▄▄▃▄▁▄▄▄▅█▄▅▅▅▅▅▅▄▅▃▅▅▅▅▁▅▄▅▄-66242324214-546200269270162212519356937131-505-13-1337-173183133081708127196197192230202203165495-362342297384228-1226222-146194-224
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us-gaap:DepreciationDepletionAndAmortization ██▇▇█▇██▇█████████▇▇▆▆▂▂▂▂▂▂▂▁▁▇▇▇▆▇▆439435424416435425434431428433433442437435446445451432428427379369214214207198210211196181168412418403381406374NA361NA367
us-gaap:IncreaseDecreaseInInventories ▅▄▄▄▃▅▄▇▂▄▄▆▆▅▄▆▃▄▂▂▁▅█▆2-3-3-1-236-740-31-7030184-1316-29-12-32-32-5385427NA-151314-9-2717-45518-3832-8NA0NA13
  2019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-09-302009-03-31
us-gaap:NetCashProvidedByUsedInInvestingActivities ▆▆▇▆▇▆▆▆▆█▆▇▇▇▆▆▆▆▆▆▆▆▁▆-483-920-166-1258258-1314-871-798-4231566-388-122-16346-400-346-592-705-1246-756-1147-1074-6944-992NA-918-808-3241-790-2399-491-1015-789-620-579-1824-1539NA-435NA-621
us-gaap:PaymentsToAcquirePropertyPlantAndEquipment ▁▅▂▁▃▅▆▇▄▃▂▂▂▂▃▂▄▅▅▅██▇▅404786497422597769933957699644545511474508556513742771822832108811041046793NA817713NANANANANANANANANANANANANANA
  2019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-09-302009-03-31
us-gaap:NetCashProvidedByUsedInFinancingActivities ▃▃▃▃▂▃▂▄▃▁▄▃▂▂▃▃▃▃▃▃▃▃█▄-466-497-140358-1094335-1037497-569-28811005-15-1473-1036-300-369-2523295188741716427929NA37217625386761554268-179-49-10-104894309NA-405NA456
us-gaap:ProceedsFromIssuanceOfLongTermDebt ▁▁▁▂▁▃▁▄▁▁▄▂▂▃▃▅▅▃▂█▃▃▆▃3116127081811566131204832037021734708201205181526882887116546552551187119934391496NA935770137716095000207267535075950430NA3749NA595
us-gaap:RepaymentsOfLongTermDebt ▁▁▁▃▁▄▂▃▂▆▂▅▅▄▄▅▃▂▃█▃▃▁▁53648643144070110604502765710200021251665131019919536411274364896486400NA1186895155113315525123159915075352438NA-3407NA-31
  2019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-09-302009-03-31
us-gaap:RepaymentsOfLongTermDebt ▁▁▁▃▁▄▂▃▂▆▂▅▅▄▄▅▃▂▃█▃▃▁▁53648643144070110604502765710200021251665131019919536411274364896486400NA1186895155113315525123159915075352438NA-3407NA-31
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 us-gaap:DebtInstrumentInterestRateStatedPercentage us-gaap:DebtInstrument,dei:LegalEntity wmb:A7.5PercentDebenturesDue2031,wmb:WilliamsCompaniesInc0.075NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
 us-gaap:DebtInstrumentInterestRateStatedPercentage us-gaap:DebtInstrument,dei:LegalEntity wmb:A7.75PercentSeniorUnsecuredNotesDue2031,wmb:WilliamsCompaniesInc0.0775NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
 us-gaap:DebtInstrumentInterestRateStatedPercentage us-gaap:DebtInstrument,dei:LegalEntity wmb:A7.85PercentSeniorUnsecuredNotesDue2026,wmb:TranscontinentalGasPipeLineCompanyLLC0.0785NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
 us-gaap:DebtInstrumentInterestRateStatedPercentage us-gaap:DebtInstrument,dei:LegalEntity wmb:A7.875PercentSeniorUnsecuredNotesDue2021,wmb:WilliamsCompaniesInc0.07875NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
 us-gaap:DebtInstrumentInterestRateStatedPercentage us-gaap:DebtInstrument,dei:LegalEntity wmb:A8.75PercentSeniorUnsecuredNotesDue2032,wmb:WilliamsCompaniesInc0.0875NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
 us-gaap:DebtInstrumentInterestRateStatedPercentage us-gaap:DebtInstrument,dei:LegalEntity wmb:FinancingObligationsApproxIntRate,wmb:TranscontinentalGasPipeLineCompanyLLC0.09NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
 us-gaap:DebtInstrumentInterestRateStatedPercentage us-gaap:DebtInstrument,dei:LegalEntity wmb:Various7.625PercentTo10.25PercentSeniorUnsecuredNotesAndDebenturesDue2019To2027MaximumInterestRate,wmb:WilliamsCompaniesInc0.1025NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
 us-gaap:DebtInstrumentInterestRateStatedPercentage us-gaap:DebtInstrument,dei:LegalEntity wmb:Various7.625PercentTo10.25PercentSeniorUnsecuredNotesAndDebenturesDue2019To2027MinimumInterestRate,wmb:WilliamsCompaniesInc0.07625NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
 us-gaap:DebtInstrumentInterestRateStatedPercentage us-gaap:DebtInstrument,us-gaap:SubsequentEventType,dei:LegalEntity wmb:A8.75PercentSeniorUnsecuredNotesDue2020,us-gaap:SubsequentEvent,wmb:WilliamsCompaniesIncNANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA

Common Stock Value

us-gaap:CommonStockValue



Period End2019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-03-312009-12-312008-12-31
Value124712471246124612451245862862861861861861785785785785784784784783782782782720718718718717716662661630626623623622620619619618613
Percentage of CommonStockValue100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets2.72.72.72.72.72.61.91.81.91.91.81.81.71.71.61.61.61.51.51.61.51.62.22.52.62.72.82.92.93.13.33.53.82.42.42.52.52.62.52.42.4

Common Stock Par Or Stated Value Per Share

Common Stock Shares Issued

us-gaap:CommonStockSharesIssued



Period End2019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-03-312009-12-312008-12-31
Value124712471246124612451245862862861861861861785785785785784784784783782782782720718718718717716662661630626623623622620619619618613
Percentage of CommonStockSharesIssued100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Common Stock Shares Authorized

us-gaap:CommonStockSharesAuthorized



Period End2019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-03-312009-12-312008-12-31
Value147014701470147014701470960960960960960960960960960960960960960960960960960960960960960960960960960960960960960960960960960960
Percentage of CommonStockSharesAuthorized100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Weighted Average Number Of Diluted Shares Outstanding

Weighted Average Number Of Shares Outstanding Basic

Earnings Per Share Basic

us-gaap:EarningsPerShareBasic



Period End2019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-09-302009-03-31
Value0.099999999999999980.180.260.16-0.630.130.160.182.040.040.10.45-0.0199999999999999070.08-0.54-0.09-0.95-0.050.150.090.239999999999999772.240.150.20.210.210.240.229999999999999980.250.210.71-0.74999999999999990.460.390.550.29000000000000004-2.160.32-0.330.24-0.3
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 End2019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-09-302009-03-31
Value0.099999999999999980.180.260.16-0.620.130.160.182.03000000000000020.040.10.45-0.0199999999999999070.08-0.54-0.09-0.95-0.050.150.090.239999999999999772.220.150.20.20.210.230.22000000000000020.250.210.7-0.74000000000000010.460.380.540.29000000000000004-2.160.31-0.330.24-0.29
Percentage of EarningsPerShareDiluted100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Income Loss From Continuing Operations Per Basic Share

Income Loss From Continuing Operations Per Diluted Share

Revenues

us-gaap:Revenues



Period End2019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-09-302009-03-31
Value2107199920412054220423032091208822281891192419882198190517361660200617991839171621412069167817491623176718101869175218462019-17270326692575242423042289259620981922
Percentage of Revenues100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Revenues100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ConsolidationItems

us-gaap:IntersegmentElimination



Period End2019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-312012-09-30
Value-70-58-68-83-123-147-3-3-3-2-4-3-2-20-21-15-35-64-39-21-16-8-4-3-29-3-3-34
Percentage of Revenues-3.3-2.9-3.3-4.0-5.6-6.4-0.1-0.1-0.1-0.1-0.2-0.2-0.1-1.0-1.2-0.9-1.7-3.6-2.1-1.2-0.7-0.4-0.2-0.2-1.8-0.2-0.2-1.9
Percentage of Revenues-3.3-2.9-3.3-4.0-5.6-6.4-0.1-0.1-0.1-0.1-0.2-0.2-0.1-1.0-1.2-0.9-1.7-3.6-2.1-1.2-0.7-0.4-0.2-0.2-1.8-0.2-0.2-1.9
Percentage of Revenues us-gaap:IntersegmentElimination100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ConsolidationItems, us-gaap:ProductOrService

us-gaap:IntersegmentElimination, us-gaap:Product



Period End2019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-312012-09-30
Value-40-29-43-58-97-121-83-85-98-800010-100000-2700-32
Percentage of Revenues-1.9-1.5-2.1-2.8-4.4-5.3-4.0-4.1-4.4-4.20.00.00.00.0-0.10.00.00.00.00.0-1.70.00.0-1.8
Percentage of Revenues-1.9-1.5-2.1-2.8-4.4-5.3-4.0-4.1-4.4-4.20.00.00.00.0-0.10.00.00.00.00.0-1.70.00.0-1.8
Percentage of Revenues us-gaap:IntersegmentElimination us-gaap:Product100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.00.0100.00.0100.00.00.00.00.00.0100.00.00.0100.0

us-gaap:IntersegmentElimination, us-gaap:Service



Period End2019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-30
Value-30-29-25-25-26-26-25-25-20-21
Percentage of Revenues-1.4-1.5-1.2-1.2-1.2-1.1-1.2-1.2-0.9-1.1
Percentage of Revenues-1.4-1.5-1.2-1.2-1.2-1.1-1.2-1.2-0.9-1.1
Percentage of Revenues us-gaap:IntersegmentElimination us-gaap:Service100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

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

us-gaap:IntersegmentElimination, us-gaap:Product, us-gaap:CorporateAndOther



Period End2019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-312012-09-30
Value00000000-16000000000000000
Percentage of Revenues0.00.00.00.00.00.00.00.0-0.70.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0
Percentage of Revenues0.00.00.00.00.00.00.00.0-0.70.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0
Percentage of Revenues us-gaap:IntersegmentElimination us-gaap:Product us-gaap:CorporateAndOther0.00.00.00.00.00.00.00.0100.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:IntersegmentElimination, us-gaap:Product, wmb:AtlanticGulf



Period End2019-12-312019-09-302018-12-312018-09-30
Value-14-10-63-85
Percentage of Revenues-0.7-0.5-2.9-3.7
Percentage of Revenues-0.7-0.5-2.9-3.7
Percentage of Revenues us-gaap:IntersegmentElimination us-gaap:Product wmb:AtlanticGulf100.0100.0100.0100.0

us-gaap:IntersegmentElimination, us-gaap:Product, wmb:NortheastGAndP



Period End2019-12-312019-09-302018-12-312018-09-30
Value-8-8-14-10
Percentage of Revenues-0.4-0.4-0.6-0.4
Percentage of Revenues-0.4-0.4-0.6-0.4
Percentage of Revenues us-gaap:IntersegmentElimination us-gaap:Product wmb:NortheastGAndP100.0100.0100.0100.0

us-gaap:IntersegmentElimination, us-gaap:Product, wmb:West



Period End2019-12-312019-09-302018-12-312018-09-30
Value-18-11-20-26
Percentage of Revenues-0.9-0.6-0.9-1.1
Percentage of Revenues-0.9-0.6-0.9-1.1
Percentage of Revenues us-gaap:IntersegmentElimination us-gaap:Product wmb:West100.0100.0100.0100.0

us-gaap:IntersegmentElimination, us-gaap:Service, us-gaap:CorporateAndOther



Period End2019-12-312019-09-302018-12-312018-09-30
Value-4-3-3-3
Percentage of Revenues-0.2-0.2-0.1-0.1
Percentage of Revenues-0.2-0.2-0.1-0.1
Percentage of Revenues us-gaap:IntersegmentElimination us-gaap:Service us-gaap:CorporateAndOther100.0100.0100.0100.0

us-gaap:IntersegmentElimination, us-gaap:Service, wmb:AtlanticGulf



Period End2019-12-312019-09-302018-12-312018-09-30
Value-13-13-12-12
Percentage of Revenues-0.6-0.7-0.5-0.5
Percentage of Revenues-0.6-0.7-0.5-0.5
Percentage of Revenues us-gaap:IntersegmentElimination us-gaap:Service wmb:AtlanticGulf100.0100.0100.0100.0

us-gaap:IntersegmentElimination, us-gaap:Service, wmb:NortheastGAndP



Period End2019-12-312019-09-302018-12-312018-09-30
Value-13-13-11-11
Percentage of Revenues-0.6-0.7-0.5-0.5
Percentage of Revenues-0.6-0.7-0.5-0.5
Percentage of Revenues us-gaap:IntersegmentElimination us-gaap:Service wmb:NortheastGAndP100.0100.0100.0100.0

us-gaap:OperatingSegments, us-gaap:Product, us-gaap:CorporateAndOther



Period End2019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-312012-09-30
Value000000001900000000000000
Percentage of Revenues0.00.00.00.00.00.00.00.00.00.50.00.00.00.00.00.00.00.00.00.00.00.00.00.0
Percentage of Revenues0.00.00.00.00.00.00.00.00.00.50.00.00.00.00.00.00.00.00.00.00.00.00.00.0
Percentage of Revenues us-gaap:OperatingSegments us-gaap:Product us-gaap:CorporateAndOther0.00.00.00.00.00.00.00.0100.0100.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:OperatingSegments, us-gaap:Product, wmb:AtlanticGulf



Period End2019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-30
Value6276688210613110593119106
Percentage of Revenues2.93.83.34.04.85.75.04.55.35.6
Percentage of Revenues2.93.83.34.04.85.75.04.55.35.6
Percentage of Revenues us-gaap:OperatingSegments us-gaap:Product wmb:AtlanticGulf100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OperatingSegments, us-gaap:Product, wmb:NortheastGAndP



Period End2019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-30
Value363037474569759811061
Percentage of Revenues1.71.51.82.32.03.03.64.74.93.2
Percentage of Revenues1.71.51.82.32.03.03.64.74.93.2
Percentage of Revenues us-gaap:OperatingSegments us-gaap:Product wmb:NortheastGAndP100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OperatingSegments, us-gaap:Product, wmb:West



Period End2019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-30
Value495389434479626732560530637485
Percentage of Revenues23.519.521.323.328.431.826.825.428.625.6
Percentage of Revenues23.519.521.323.328.431.826.825.428.625.6
Percentage of Revenues us-gaap:OperatingSegments us-gaap:Product wmb:West100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OperatingSegments, us-gaap:Service, us-gaap:CorporateAndOther



Period End2019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-30
Value87878108869
Percentage of Revenues0.40.40.40.30.40.40.40.40.30.5
Percentage of Revenues0.40.40.40.30.40.40.40.40.30.5
Percentage of Revenues us-gaap:OperatingSegments us-gaap:Service us-gaap:CorporateAndOther100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OperatingSegments, us-gaap:Service, wmb:AtlanticGulf



Period End2019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-30
Value723731698709703607590609592564
Percentage of Revenues34.336.634.234.531.926.428.229.226.629.8
Percentage of Revenues34.336.634.234.531.926.428.229.226.629.8
Percentage of Revenues us-gaap:OperatingSegments us-gaap:Service wmb:AtlanticGulf100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OperatingSegments, us-gaap:Service, wmb:NortheastGAndP



Period End2019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-30
Value379353330276269247232228224214
Percentage of Revenues18.017.716.213.412.210.711.110.910.111.3
Percentage of Revenues18.017.716.213.412.210.711.110.910.111.3
Percentage of Revenues us-gaap:OperatingSegments us-gaap:Service wmb:NortheastGAndP100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OperatingSegments, us-gaap:Service, wmb:West



Period End2019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-30
Value429433478473486533535531657544
Percentage of Revenues20.421.723.423.022.123.125.625.429.528.8
Percentage of Revenues20.421.723.423.022.123.125.625.429.528.8
Percentage of Revenues us-gaap:OperatingSegments us-gaap:Service wmb:West100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OperatingSegments, wmb:NonRegulatedServiceCommodityConsideration, wmb:AtlanticGulf



Period End2019-12-312019-09-302018-12-312018-09-30
Value871418
Percentage of Revenues0.40.40.60.8
Percentage of Revenues0.40.40.60.8
Percentage of Revenues us-gaap:OperatingSegments wmb:NonRegulatedServiceCommodityConsideration wmb:AtlanticGulf100.0100.0100.0100.0

us-gaap:OperatingSegments, wmb:NonRegulatedServiceCommodityConsideration, wmb:NortheastGAndP



Period End2019-12-312019-09-302018-12-312018-09-30
Value3166
Percentage of Revenues0.10.10.30.3
Percentage of Revenues0.10.10.30.3
Percentage of Revenues us-gaap:OperatingSegments wmb:NonRegulatedServiceCommodityConsideration wmb:NortheastGAndP100.0100.0100.0100.0

us-gaap:OperatingSegments, wmb:NonRegulatedServiceCommodityConsideration, wmb:West



Period End2019-12-312019-09-302018-12-312018-09-30
Value34306497
Percentage of Revenues1.61.52.94.2
Percentage of Revenues1.61.52.94.2
Percentage of Revenues us-gaap:OperatingSegments wmb:NonRegulatedServiceCommodityConsideration wmb:West100.0100.0100.0100.0

us-gaap:ConsolidationItems, us-gaap:StatementBusinessSegments

us-gaap:OperatingSegments, us-gaap:CorporateAndOther



Period End2019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-312012-09-30
Value8787810888898910111843704726656966597777
Percentage of Revenues0.40.40.40.30.40.40.40.40.40.40.50.40.40.50.61.12.13.92.61.53.03.33.93.40.40.40.40.4
Percentage of Revenues0.40.40.40.30.40.40.40.40.40.40.50.40.40.50.61.12.13.92.61.53.03.33.93.40.40.40.40.4
Percentage of Revenues us-gaap:OperatingSegments us-gaap:CorporateAndOther100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OperatingSegments, wmb:AtlanticGulf



Period End2019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-30
Value793814779804823756707717711670
Percentage of Revenues37.640.738.239.137.332.833.834.331.935.4
Percentage of Revenues37.640.738.239.137.332.833.834.331.935.4
Percentage of Revenues us-gaap:OperatingSegments wmb:AtlanticGulf100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OperatingSegments, wmb:NortheastGAndP



Period End2019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-30
Value418384370328320322311330334275
Percentage of Revenues19.819.218.116.014.514.014.915.815.014.5
Percentage of Revenues19.819.218.116.014.514.014.915.815.014.5
Percentage of Revenues us-gaap:OperatingSegments wmb:NortheastGAndP100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OperatingSegments, wmb:West



Period End2019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-30
Value958852952998117613621173114312941029
Percentage of Revenues45.542.646.648.653.459.156.154.758.154.4
Percentage of Revenues45.542.646.648.653.459.156.154.758.154.4
Percentage of Revenues us-gaap:OperatingSegments wmb:West100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ProductOrService

us-gaap:Product



Period End2019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-312012-09-302012-06-302012-03-31
Value55346649655068081165763676958153443151956059851979694285393088710461104107711791342
Percentage of Revenues26.223.324.326.830.935.231.430.534.530.730.826.025.931.132.530.237.245.550.853.254.759.261.061.563.966.5
Percentage of Revenues26.223.324.326.830.935.231.430.534.530.730.826.025.931.132.530.237.245.550.853.254.759.261.061.563.966.5
Percentage of Revenues us-gaap:Product100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:Service



Period End2019-12-312019-09-302018-12-312018-09-30
Value1509149514401371
Percentage of Revenues71.674.865.359.5
Percentage of Revenues71.674.865.359.5
Percentage of Revenues us-gaap:Service100.0100.0100.0100.0

wmb:NonRegulatedServiceCommodityConsideration



Period End2019-12-312019-09-302018-12-312018-09-30
Value453884121
Percentage of Revenues2.11.93.85.3
Percentage of Revenues2.11.93.85.3
Percentage of Revenues wmb:NonRegulatedServiceCommodityConsideration100.0100.0100.0100.0

us-gaap:ProductOrService, us-gaap:StatementBusinessSegments

us-gaap:Product, us-gaap:CorporateAndOther



Period End2019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-312012-09-302012-06-302012-03-31
Value00000000190000000000000000
Percentage of Revenues0.00.00.00.00.00.00.00.00.00.50.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0
Percentage of Revenues0.00.00.00.00.00.00.00.00.00.50.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0
Percentage of Revenues us-gaap:Product us-gaap:CorporateAndOther0.00.00.00.00.00.00.00.0100.0100.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:Product, wmb:AtlanticGulf



Period End2019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-30
Value48665152434650355657
Percentage of Revenues2.33.32.52.52.02.02.41.72.53.0
Percentage of Revenues2.33.32.52.52.02.02.41.72.53.0
Percentage of Revenues us-gaap:Product wmb:AtlanticGulf100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:Product, wmb:NortheastGAndP



Period End2019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-30
Value282229363159668910556
Percentage of Revenues1.31.11.41.81.42.63.24.34.73.0
Percentage of Revenues1.31.11.41.81.42.63.24.34.73.0
Percentage of Revenues us-gaap:Product wmb:NortheastGAndP100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:Product, wmb:West



Period End2019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-30
Value477378416462606706541512607459
Percentage of Revenues22.618.920.422.527.530.725.924.527.224.3
Percentage of Revenues22.618.920.422.527.530.725.924.527.224.3
Percentage of Revenues us-gaap:Product wmb:West100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:Service, us-gaap:CorporateAndOther



Period End2019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-30
Value4454575546
Percentage of Revenues0.20.20.20.20.20.30.20.20.20.3
Percentage of Revenues0.20.20.20.20.20.30.20.20.20.3
Percentage of Revenues us-gaap:Service us-gaap:CorporateAndOther100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:Service, wmb:AtlanticGulf



Period End2019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-30
Value710718687697691595578596582553
Percentage of Revenues33.735.933.733.931.425.827.628.526.129.2
Percentage of Revenues33.735.933.733.931.425.827.628.526.129.2
Percentage of Revenues us-gaap:Service wmb:AtlanticGulf100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:Service, wmb:NortheastGAndP



Period End2019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-30
Value366340319266258236222219216207
Percentage of Revenues17.417.015.613.011.710.210.610.59.710.9
Percentage of Revenues17.417.015.613.011.710.210.610.59.710.9
Percentage of Revenues us-gaap:Service wmb:NortheastGAndP100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:Service, wmb:West



Period End2019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-30
Value429433478473486533535531657544
Percentage of Revenues20.421.723.423.022.123.125.625.429.528.8
Percentage of Revenues20.421.723.423.022.123.125.625.429.528.8
Percentage of Revenues us-gaap:Service wmb:West100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Revenue From Contract With Customer Excluding Assessed Tax

us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax



Period End2019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-09-302009-03-31
Value2100198520212034218122802075207322281891192419882198190517361660200617991839171621412069167817491623176718101869175218462019-17270326692575242423042289259620981922
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Revenues99.799.399.099.099.099.099.299.3100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ProductOrService

us-gaap:Service



Period End2019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-30
Value1547151714891440144013711340135114591310
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax73.776.473.770.866.060.164.665.265.569.3
Percentage of Revenues73.475.973.070.165.359.564.164.765.569.3
Percentage of Revenues us-gaap:Service102.5101.50.00.0100.0100.00.00.00.00.0

wmb:NGLAndNaturalGasProductSales



Period End2019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value553468492550676801656627
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax26.323.624.327.031.035.131.630.2
Percentage of Revenues26.223.424.126.830.734.831.430.0
Percentage of Revenues wmb:NGLAndNaturalGasProductSales0.00.00.00.00.00.00.00.0

wmb:NonRegulatedServiceCommodityConsideration



Period End2019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value453856648412194101
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax2.11.92.83.13.95.34.54.9
Percentage of Revenues2.11.92.73.13.85.34.54.8
Percentage of Revenues wmb:NonRegulatedServiceCommodityConsideration100.0100.00.00.0100.0100.00.00.0

wmb:NonRegulatedServiceMonetaryConsideration



Period End2019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value725716750693713749730729
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax34.536.137.134.132.732.935.235.2
Percentage of Revenues34.435.836.733.732.432.534.934.9
Percentage of Revenues wmb:NonRegulatedServiceMonetaryConsideration0.00.00.00.00.00.00.00.0

wmb:OtherService



Period End2019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value6453504341343440
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax3.02.72.52.11.91.51.61.9
Percentage of Revenues3.02.72.42.11.91.51.61.9
Percentage of Revenues wmb:OtherService0.00.00.00.00.00.00.00.0

wmb:RegulatedService



Period End2019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value713710673684666566558572
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax34.035.833.333.630.524.826.927.6
Percentage of Revenues33.835.533.033.330.224.626.727.4
Percentage of Revenues wmb:RegulatedService0.00.00.00.00.00.00.00.0

Revenue From Contract With Customer Including Assessed Tax

Sales Revenue Goods Net

Cost Of Goods And Services Sold

Cost Of Goods And Service Excluding Depreciation Depletion And Amortization

us-gaap:ProductOrService

us-gaap:CostOfGoodsAndServiceExcludingDepreciationDepletionAndAmortization

us-gaap:OilAndGasPurchased



Period End2019-12-312019-09-302018-12-312018-09-30
Value519434668790
Percentage of CostOfGoodsAndServiceExcludingDepreciationDepletionAndAmortization100.0100.0100.0100.0
Percentage of Revenues24.621.730.334.3
Percentage of Revenues us-gaap:OilAndGasPurchased0.00.00.00.0

wmb:NaturalGasPurchasedForShrink



Period End2019-12-312019-09-302018-12-312018-09-30
Value22194630
Percentage of CostOfGoodsAndServiceExcludingDepreciationDepletionAndAmortization4.24.46.93.8
Percentage of Revenues1.01.02.11.3
Percentage of Revenues wmb:NaturalGasPurchasedForShrink0.00.00.00.0

Cost Of Goods Sold

Operating Costs And Expenses

us-gaap:OperatingCostsAndExpenses



Period End2019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-312012-09-302012-06-302012-03-31
Value377364387340373389388357428400389368401394394391428403437387474412308298269291260261275230
Percentage of OperatingCostsAndExpenses100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Revenues17.918.219.016.616.916.918.617.119.221.220.218.518.220.722.723.621.322.423.822.622.119.918.417.016.616.514.414.914.911.4

Costs And Expenses

us-gaap:CostsAndExpenses



Period End2019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-30
Value1873137115431493283818021681159724151614154315551617156022241398275514431447148916101762136713291287141713841622133614641492173214671479
Percentage of CostsAndExpenses100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Revenues88.968.675.672.7128.878.280.476.5108.485.480.278.273.681.9128.184.2137.380.278.786.875.285.281.576.079.380.276.586.876.379.373.9-10188.254.355.4

Selling General And Administrative Expense

us-gaap:SellingGeneralAndAdministrativeExpense



Period End2019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-09-302009-03-31
Value1481301521281331741301321561381531611671771582211941771741962041711361501301231322779610596-76130134137142123123111126125
Percentage of SellingGeneralAndAdministrativeExpense100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Revenues7.06.57.46.26.07.66.26.37.07.38.08.17.69.39.113.39.79.89.511.49.58.38.18.68.07.07.314.85.55.74.8447.14.85.05.35.95.35.44.36.06.5

Operating Income Loss

us-gaap:OperatingIncomeLoss



Period End2019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-09-302009-03-31
Value234628498561-634501410491-187277381433581345-488262-749356392227531307311420336350426380373332527346494547480442-1291416478394280
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 Revenues11.131.424.427.3-28.821.819.623.5-8.414.619.821.826.418.1-28.115.8-37.319.821.313.224.814.818.524.020.719.823.520.321.318.026.1-2035.318.320.518.618.2-56.018.218.418.814.6

Interest Expense

us-gaap:InterestExpense



Period End2019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-31
Value298296296296294270275273265267271280293297298291268263262251234210163140
Percentage of InterestExpense100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Revenues14.114.814.514.413.311.713.213.111.914.114.114.113.315.617.217.513.414.614.214.610.910.19.78.0

Interest And Debt Expense

Interest Expense Debt

Other Nonoperating Income Expense

us-gaap:OtherNonoperatingIncomeExpense



Period End2019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-09-302009-03-31
Value141711-7522621-117202174222017153220341616104112-2-103-470-240-4-1-7-1-2
Percentage of OtherNonoperatingIncomeExpense100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0100.0100.0100.00.0100.0100.00.0100.0100.0100.0100.0100.0
Percentage of Revenues0.70.10.30.5-0.32.31.21.0-5.31.11.13.71.01.01.00.91.61.11.80.90.70.50.20.10.10.1-0.1-0.10.00.2-0.2-41.20.0-0.10.20.0-0.2-0.0-0.3-0.0-0.1

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 End2019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-30
Value40319422283-705390321325-47814925860686200-650-11-1784-238266434242706207247260302327283277237492-314024453381669-1371329
Percentage of IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Revenues1.916.020.713.8-32.016.915.415.6-21.57.913.430.53.910.5-37.4-0.7-88.9-13.214.52.519.8130.812.314.116.017.118.115.115.812.824.4182.414.916.713.168.9-59.514.4

Income Loss From Continuing Operations Including Portion Attributable To Noncontrolling Interest

Income Loss From Continuing Operations Before Income Taxes Foreign

Income Tax Expense Benefit

us-gaap:IncomeTaxExpenseBenefit



Period End2019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-09-302009-03-31
Value91779869-1591905255-21002465374969-1452-447-65833011699884516210296797771133-7055145-6112-151104-958756
Percentage of IncomeTaxExpenseBenefit100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Revenues4.33.94.83.4-7.28.32.52.6-94.31.33.41.92.23.6-8.40.1-22.3-3.64.51.75.448.25.02.93.85.85.34.24.43.86.6411.82.05.4-0.24.6-6.64.5-3.74.12.9

Income Taxes Paid Net

Profit Loss

us-gaap:ProfitLoss



Period End2019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-09-302009-03-31
Value-66242324214-546200269270162212519356937131-505-13-1337-173183133081708127196197192230202203165495-362342297384228-1226222-146194-224
Percentage of ProfitLoss100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Revenues-3.112.115.910.4-24.88.712.912.972.86.610.028.61.76.9-29.1-0.8-66.7-9.610.00.814.482.67.611.212.110.912.710.811.68.924.52129.412.711.114.99.4-53.29.7-5.69.2-11.7

us-gaap:StatementEquityComponents

us-gaap:NoncontrollingInterest



Period End2019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-09-302009-03-31
Value-1902114192571134118-65921121965270-10052-622-13369-57115302456506953483372827070635437374751-52
Percentage of ProfitLoss287.98.74.38.9-4.635.549.843.7-4.073.658.034.4140.553.419.8-400.046.576.937.7-438.537.31.818.928.626.030.026.223.620.014.5-22.720.523.616.423.7-3.016.7-32.226.323.2
Percentage of Revenues-9.01.10.70.91.13.16.45.7-2.94.95.89.92.43.7-5.83.1-31.0-7.43.8-3.35.41.41.43.22.83.82.82.71.83.6-482.42.62.62.42.21.61.61.82.4-2.7
Percentage of Revenues us-gaap:NoncontrollingInterest0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:Parent



Period End2019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312009-09-302009-03-31
Value124221310195-57112913515216873381373-1561-405-65-715-40114701931678103140142161149155132423-444272227321174-1263185-193172143-172
Percentage of ProfitLoss-187.991.395.791.1104.664.550.256.3104.026.442.065.6-40.546.680.2500.053.523.162.3538.562.798.281.171.474.070.073.876.480.085.5122.779.576.483.676.3103.083.3132.20.073.776.8
Percentage of Revenues5.911.115.29.5-25.95.66.57.375.71.74.218.8-0.73.2-23.3-3.9-35.6-2.26.24.19.081.16.18.08.08.98.08.87.221.02611.810.18.512.57.2-54.88.1-7.40.06.8-8.9
Percentage of Revenues us-gaap:Parent0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:RetainedEarnings



Period End2019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-06-302013-03-312012-12-312012-09-302012-06-302012-03-31
Value124221310195-57112913515216873381373-1561-405-65-715-40114701931678103140142161149155132423
Percentage of ProfitLoss-187.991.395.791.1104.664.550.256.3104.026.442.065.6-40.546.680.2500.053.523.162.3538.562.798.281.171.474.070.073.876.480.085.5
Percentage of Revenues5.911.115.29.5-25.95.66.57.375.71.74.218.8-0.73.2-23.3-3.9-35.6-2.26.24.19.081.16.18.08.08.98.08.87.221.0
Percentage of Revenues 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

Comprehensive Income Net Of Tax

us-gaap:ComprehensiveIncomeNetOfTax



Period End2019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-31
Value191220312198-55013413615717803384378-2399-396-1-732-8112516741650132101197122149117182142445-540293248287
Percentage of ComprehensiveIncomeNetOfTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Revenues9.111.015.39.6-25.05.86.57.579.91.74.419.0-1.05.2-22.8-0.1-36.5-4.56.80.93.579.77.95.812.16.98.26.310.47.722.03176.510.89.311.1

Comprehensive Income Net Of Tax Attributable To Noncontrolling Interest

us-gaap:ComprehensiveIncomeNetOfTaxAttributableToNoncontrollingInterest



Period End2019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-31
Value-1902114192572130119-648911219752108-9881-638-15774-921011237565650694940477082707063
Percentage of ComprehensiveIncomeNetOfTaxAttributableToNoncontrollingInterest100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Revenues-9.01.10.70.91.13.16.25.7-2.94.75.89.92.45.7-5.64.9-31.8-8.74.0-5.44.70.62.23.23.52.83.82.62.32.53.5-482.42.62.62.4

Comprehensive Income Net Of Tax Including Portion Attributable To Noncontrolling Interest

us-gaap:ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest



Period End2019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-09-302009-03-31
Value1241326217-525206266276171612219657529207-49480-1370-238199-761751662169157253172218166222189515-458363318350114-11341572784-107
Percentage of ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Revenues0.012.116.010.6-23.88.912.713.277.06.510.228.91.310.9-28.54.8-68.3-13.210.8-4.48.280.310.19.015.69.712.08.912.710.225.52694.113.411.913.64.7-49.26.91.04.0-5.6

Net Income Loss

us-gaap:NetIncomeLoss



Period End2019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-09-302009-03-31
Value124221310195-57112913515216873381373-1561-405-65-715-40114701931678103140141142161149155132423-444272227321174-1263185-193143-172
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 Revenues5.911.115.29.5-25.95.66.57.375.71.74.218.8-0.73.2-23.3-3.9-35.6-2.26.24.19.081.16.18.08.78.08.98.08.87.221.02611.810.18.512.57.2-54.88.1-7.46.8-8.9

Net Income Loss Available To Common Stockholders Basic

us-gaap:NetIncomeLossAvailableToCommonStockholdersBasic



Period End2019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-30
Value123220310194-572129135152168733
Percentage of NetIncomeLossAvailableToCommonStockholdersBasic100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Revenues5.811.015.29.4-26.05.66.57.375.71.7

Net Income Loss Attributable To Noncontrolling Interest

us-gaap:NetIncomeLossAttributableToNoncontrollingInterest



Period End2019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-09-302009-03-31
Value-1902114192571134118-65921121965270-10052-622-13369-5711530245656506953483372827070635437374751-52
Percentage of NetIncomeLossAttributableToNoncontrollingInterest100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Revenues-9.01.10.70.91.13.16.45.7-2.94.95.89.92.43.7-5.83.1-31.0-7.43.8-3.35.41.41.43.23.52.83.82.82.71.83.6-482.42.62.62.42.21.61.61.82.4-2.7

Assets

us-gaap:Assets



Period End2019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-03-312009-12-312008-12-31
Value4604046281465094597045302471534637447052463524612048770475124683547288481244880749020508195116350457505634980734949283062714226455256572481624327212632026717790165022614625705250832497223848251292528026006
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:IntersegmentElimination



Period End2019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302012-12-31
Value-572-530-381-388-367-607-114-64-140-85-136-82-353-396-467-502-535-621-672-584-591-539-543-458-713-722-485
Percentage of Assets-1.2-1.1-0.8-0.8-0.8-1.3-0.2-0.1-0.3-0.2-0.3-0.2-0.8-0.8-1.0-1.0-1.1-1.2-1.3-1.2-1.2-1.1-1.6-1.6-2.6-2.7-2.0
Percentage of Assets-1.2-1.1-0.8-0.8-0.8-1.3-0.2-0.1-0.3-0.2-0.3-0.2-0.8-0.8-1.0-1.0-1.1-1.2-1.3-1.2-1.2-1.1-1.6-1.6-2.6-2.7-2.0
Percentage of Assets us-gaap:IntersegmentElimination100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:StatementBusinessSegments

us-gaap:CorporateAndOther



Period End2019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302012-12-312012-09-302011-12-31
Value11519281401782849748550541589570688656685737822852850999106411011220125172021459135918391831178213081275
Percentage of Assets2.52.03.01.71.91.61.21.11.31.21.41.41.51.61.71.71.72.02.12.22.42.520.65.25.07.07.17.36.27.7
Percentage of Assets2.52.03.01.71.91.61.21.11.31.21.41.41.51.61.71.71.72.02.12.22.42.520.65.25.07.07.17.36.27.7
Percentage of Assets us-gaap:CorporateAndOther100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

wmb:AtlanticGulf



Period End2019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302017-12-31
Value16575168881651616441163461636114989
Percentage of Assets36.036.535.535.836.134.732.3
Percentage of Assets36.036.535.535.836.134.732.3
Percentage of Assets wmb:AtlanticGulf100.0100.0100.0100.0100.0100.0100.0

wmb:NortheastGAndP



Period End2019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302017-12-31
Value15399154451550015301145261448214397
Percentage of Assets33.433.433.333.332.130.731.1
Percentage of Assets33.433.433.333.332.130.731.1
Percentage of Assets wmb:NortheastGAndP100.0100.0100.0100.0100.0100.0100.0

wmb:West



Period End2019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302017-12-31
Value13487135501347313834139481616916143
Percentage of Assets29.329.329.030.130.834.334.8
Percentage of Assets29.329.329.030.130.834.334.8
Percentage of Assets wmb:West100.0100.0100.0100.0100.0100.0100.0

Liabilities And Stockholders Equity

us-gaap:LiabilitiesAndStockholdersEquity



Period End2019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-03-312009-12-312008-12-31
Value4604046281465094597045302471534637447052463524612048770475124683547288481244880749020508195116350457505634980734949283062714226455256572481624327212632026717790165022614625705250832497223848251292528026006
Percentage of LiabilitiesAndStockholdersEquity100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
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

Stockholders Equity

us-gaap:StockholdersEquity



Period End2019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-03-312009-12-312008-12-31
Value13363136211384814406146601561093459473965681098306844446434860483056916148738779288212877791297863461648644948469447954752309229611940179379097716753772887025757384478440
Percentage of StockholdersEquity100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets29.029.429.831.332.433.120.220.120.817.617.017.89.910.310.011.712.514.515.516.317.418.322.516.317.918.718.319.319.514.514.610.910.930.230.030.029.229.530.133.432.5

Assets Current

us-gaap:AssetsCurrent



Period End2019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-03-312009-12-312008-12-31
Value15801434202812871464198415412399217922933969284514621627235712611527126414261622189018982119217816831782194618641924196116822119189428892830250525302803358937934411
Percentage of AssetsCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets3.43.14.42.83.24.23.35.14.75.08.16.03.13.44.92.63.12.52.83.23.73.86.17.76.26.77.67.57.99.28.311.911.511.011.010.010.111.814.315.017.0

Cash And Cash Equivalents At Carrying Value

us-gaap:CashAndCashEquivalentsAtCarryingValue



Period End2019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312009-09-302009-03-312008-12-312007-12-312006-12-31
Value289247806431684227512928991172191863917077135164100125204341240302860106468173282470283999667911008899961166923795101516011644186716401786143916992269
Percentage of CashAndCashEquivalentsAtCarryingValue100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets0.60.51.70.10.40.10.62.71.92.53.91.30.40.20.30.30.20.20.40.70.50.62.53.82.52.83.22.83.44.73.46.25.43.84.53.73.24.30.06.57.40.00.05.50.00.0

Receivables Net Current

us-gaap:ReceivablesNetCurrent



Period End2019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302015-12-312014-12-312013-12-312012-12-31
Value99687587992999288384474397678369386793885410411139674688
Percentage of ReceivablesNetCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets2.21.91.92.02.21.91.81.62.11.71.41.82.01.82.12.32.52.8

us-gaap:MajorCustomers, us-gaap:ConcentrationRiskByBenchmark, us-gaap:ConcentrationRiskByType

wmb:ChesapeakeEnergyCorporation, us-gaap:AccountsReceivable, us-gaap:CustomerConcentrationRisk



Period End2019-12-31
Value78
Percentage of ReceivablesNetCurrent7.8
Percentage of Assets0.2
Percentage of Assets wmb:ChesapeakeEnergyCorporation us-gaap:AccountsReceivable us-gaap:CustomerConcentrationRisk0.0

us-gaap:ProductOrService

wmb:AccountsReceivableRelatedToContractsWithCustomers



Period End2019-12-312018-12-31
Value890858
Percentage of ReceivablesNetCurrent89.486.5
Percentage of Assets1.91.9
Percentage of Assets wmb:AccountsReceivableRelatedToContractsWithCustomers0.00.0

wmb:OtherReceivable



Period End2019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-31
Value1061344159676639
Percentage of ReceivablesNetCurrent10.613.50.41.60.95.99.85.7
Percentage of Assets0.20.30.00.00.00.10.20.2
Percentage of Assets wmb:OtherReceivable0.00.00.00.00.00.00.00.0

wmb:SaleOfNGLAndRelatedProductsAndServices



Period End2019-12-312018-12-31
Value613626
Percentage of ReceivablesNetCurrent61.563.1
Percentage of Assets1.31.4
Percentage of Assets wmb:SaleOfNGLAndRelatedProductsAndServices0.00.0

wmb:TransportationOfNaturalGasAndRelatedProducts



Period End2019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-31
Value277232212187202175193170
Percentage of ReceivablesNetCurrent27.823.421.719.919.415.428.624.7
Percentage of Assets0.60.50.50.40.40.30.70.7
Percentage of Assets wmb:TransportationOfNaturalGasAndRelatedProducts0.00.00.00.00.00.00.00.0

Inventory Net

us-gaap:InventoryNet



Period End2019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-03-312009-12-312008-12-31
Value125129134129130153153160113144150148138120122142127156168200231284276222194230174190175161159186169287282264303270221222260
Percentage of InventoryNet100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets0.30.30.30.30.30.30.30.30.20.30.30.30.30.30.30.30.30.30.30.40.50.60.80.80.70.90.70.80.70.80.81.01.01.11.11.11.21.10.90.91.0

Other Assets Current

us-gaap:OtherAssetsCurrent



Period End2019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-03-312009-12-312008-12-31
Value1701832091861742422692041911942041682165381821742172002352062132241939310781834566142167152159186206167173202190224223
Percentage of OtherAssetsCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets0.40.40.40.40.40.50.60.40.40.40.40.40.51.10.40.40.40.40.50.40.40.40.60.30.40.30.30.20.30.70.80.91.00.70.80.70.70.80.80.90.9

Property Plant And Equipment Gross

us-gaap:PropertyPlantAndEquipmentGross



Period End2019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-03-312009-12-31
Value41510416474086840541386613995340863404673951338712388983834238912384613835139606390393876138070371983643535568273802648425823249342393723197225462160020835196011908232159314423081630435286992803027625
Percentage of PropertyPlantAndEquipmentGross100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets90.290.087.988.285.384.788.186.085.283.979.880.783.181.379.781.179.676.374.473.772.171.478.393.695.194.393.393.592.7101.6102.8110.2115.6123.0122.3122.9121.9120.3111.5109.3

us-gaap:PropertyPlantAndEquipmentByType, us-gaap:PublicUtilityRegulatedOrUnregulatedStatus

us-gaap:ConstructionInProgress, us-gaap:RegulatedOperation



Period End2019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-312010-12-31
Value58696516371603941985273337199240
Percentage of PropertyPlantAndEquipmentGross1.42.54.14.12.42.71.11.51.00.8
Percentage of Assets1.32.13.53.41.91.91.01.41.21.0
Percentage of Assets us-gaap:ConstructionInProgress us-gaap:RegulatedOperation0.00.00.00.00.00.00.00.00.00.0

us-gaap:ConstructionInProgress, us-gaap:UnregulatedOperation



Period End2019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-312010-12-31
Value3547785664121366264831231997648223
Percentage of PropertyPlantAndEquipmentGross0.92.01.41.13.57.312.18.93.40.7
Percentage of Assets0.81.71.20.92.85.211.58.23.90.9
Percentage of Assets us-gaap:ConstructionInProgress us-gaap:UnregulatedOperation0.00.00.00.00.00.00.00.00.00.0

us-gaap:GasGatheringAndProcessingEquipment, us-gaap:UnregulatedOperation



Period End2019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-312010-12-31
Value1759315324184402041320789187499185772764356134
Percentage of PropertyPlantAndEquipmentGross42.439.646.752.553.351.535.634.333.720.2
Percentage of Assets38.233.839.843.642.437.133.831.839.024.6
Percentage of Assets us-gaap:GasGatheringAndProcessingEquipment us-gaap:UnregulatedOperation0.00.00.00.00.00.00.00.00.00.0

us-gaap:GasTransmissionAndDistributionEquipment, us-gaap:RegulatedOperation



Period End2019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-312010-12-31
Value18076173121446012692121891086710633996395939066
Percentage of PropertyPlantAndEquipmentGross43.544.836.632.631.229.841.244.250.329.8
Percentage of Assets39.338.231.227.124.921.539.241.058.136.3
Percentage of Assets us-gaap:GasTransmissionAndDistributionEquipment us-gaap:RegulatedOperation0.00.00.00.00.00.00.00.00.00.0

us-gaap:OtherCapitalizedPropertyPlantAndEquipment, us-gaap:RegulatedOperation



Period End2019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-312010-12-31
Value2382192616341590158413361293141913911359
Percentage of PropertyPlantAndEquipmentGross5.75.04.14.14.13.75.06.37.34.5
Percentage of Assets5.24.33.53.43.22.64.85.88.45.4
Percentage of Assets us-gaap:OtherCapitalizedPropertyPlantAndEquipment us-gaap:RegulatedOperation0.00.00.00.00.00.00.00.00.00.0

us-gaap:OtherCapitalizedPropertyPlantAndEquipment, us-gaap:UnregulatedOperation



Period End2019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-312010-12-31
Value25192356277622022170185013161103816773
Percentage of PropertyPlantAndEquipmentGross6.16.17.05.75.65.15.14.94.32.5
Percentage of Assets5.55.26.04.74.43.74.84.54.93.1
Percentage of Assets us-gaap:OtherCapitalizedPropertyPlantAndEquipment us-gaap:UnregulatedOperation0.00.00.00.00.00.00.00.00.00.0

Accumulated Depreciation Depletion And Amortization Property Plant And Equipment

us-gaap:AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment



Period End2019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302015-12-312014-12-312013-12-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-03-312009-12-31
Value123101203411737114601115711279119101162011302110031085610580104841019894608354761370796916677966376502111861084210475-10163979093168981
Percentage of AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets26.726.025.224.924.623.925.724.724.423.922.322.322.421.619.316.528.029.132.533.437.339.442.842.241.8-40.741.137.135.5

Property Plant And Equipment Net

us-gaap:PropertyPlantAndEquipmentNet



Period End2019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-03-312009-12-312008-12-31
Value2920029613291312908127504286742895328847282112770928042277622842828263282492982329579294762908928536280812739819442187111821017467165991599515467146841405612964125802097320600203412027218909187141864417741
Percentage of PropertyPlantAndEquipmentNet100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets63.464.062.663.360.760.862.461.360.960.157.558.460.759.858.761.160.358.056.956.655.555.055.666.167.166.064.764.563.669.169.472.976.280.280.181.181.279.374.573.868.2

Long Term Investments

Investments In Affiliates Subsidiaries Associates And Joint Ventures

Goodwill

us-gaap:Goodwill



Period End2019-12-312018-12-312017-12-312016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302011-12-312010-12-312010-09-302010-03-312009-12-312008-12-31
Value18804747474711451145114511201658646646646646646646649650724088101110111011
Percentage of Goodwill100.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0100.0100.0100.0100.0100.0
Percentage of Assets0.40.00.10.10.10.12.32.22.32.23.31.82.32.42.42.52.62.73.13.60.00.00.04.04.03.9

us-gaap:StatementBusinessSegments

wmb:NortheastGAndP



Period End2019-12-312018-12-312017-12-31
Value18800
Percentage of Goodwill100.00.00.0
Percentage of Assets0.40.00.0
Percentage of Assets wmb:NortheastGAndP1.20.00.0

wmb:West



Period End2019-12-312018-12-312017-12-31
Value0047
Percentage of Goodwill0.00.0100.0
Percentage of Assets0.00.00.1
Percentage of Assets wmb:West0.00.00.3

Intangible Assets Net Excluding Goodwill

Intangible Assets Net Including Goodwill

us-gaap:IntangibleAssetsNetIncludingGoodwill



Period End2019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302015-12-31
Value7959804181238096776783248406864487918873948195709663975210017
Percentage of IntangibleAssetsNetIncludingGoodwill100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets17.317.417.517.617.117.718.118.419.019.219.420.120.620.620.4

Deferred Tax Assets Liabilities Net

Other Assets Noncurrent

us-gaap:OtherAssetsNoncurrent



Period End2019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-03-312009-12-312008-12-31
Value1066965966962746744664649619630603597581562554614561683633644619632642619599623657583596616610621637674674689645561551502499
Percentage of OtherAssetsNoncurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets2.32.12.12.11.61.61.41.41.31.41.21.31.21.21.21.31.11.31.21.31.21.31.82.22.22.42.62.32.42.93.03.53.92.62.62.72.62.42.22.01.9

Liabilities Current

us-gaap:LiabilitiesCurrent



Period End2019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-03-312009-12-312008-12-31
Value39683324338941691811276119582164264623543996204529492465275227892497385837682330256729312396254919832086237115601549137912981534167524392390245825742549209724773519
Percentage of LiabilitiesCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets8.67.27.39.14.05.94.24.65.75.18.24.36.35.25.75.75.17.67.44.65.15.96.99.07.37.99.26.36.46.56.48.610.29.39.39.810.310.78.39.813.5

Debt Current

Accounts Payable Current

us-gaap:AccountsPayableCurrent



Period End2019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-03-312009-12-312008-12-31
Value55260262762066273989377697877373468062361968873974472672372886510179901094960101496993592076869567669111749889139188699079341052
Percentage of AccountsPayableCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets1.21.31.31.31.51.61.91.62.11.71.51.41.31.31.41.51.51.41.41.41.72.02.83.93.53.83.83.83.83.63.43.84.24.53.83.63.73.63.63.74.0

Accounts Payable And Accrued Liabilities Current

Other Accrued Liabilities Current

us-gaap:OtherAccruedLiabilitiesCurrent



Period End2019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-312010-12-312009-12-31
Value346371221356279342341275271309303
Percentage of OtherAccruedLiabilitiesCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets0.80.80.50.80.60.71.31.11.61.21.2

Accrued Income Taxes Current

Other Liabilities Current

Long Term Debt

Deferred Tax Liabilities Noncurrent

Pension And Other Postretirement Defined Benefit Plans Liabilities Noncurrent

us-gaap:RetirementPlanType

us-gaap:PensionAndOtherPostretirementDefinedBenefitPlansLiabilitiesNoncurrent

us-gaap:PensionPlansDefinedBenefit



Period End2019-12-312018-12-312017-12-312016-12-31
Value275390210
Percentage of PensionAndOtherPostretirementDefinedBenefitPlansLiabilitiesNoncurrent100.0100.0100.0100.0
Percentage of Assets0.10.10.20.4
Percentage of Assets us-gaap:PensionPlansDefinedBenefit0.00.00.00.0

Minority Interest

us-gaap:MinorityInterest



Period End2019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-03-312009-12-312008-12-31
Value300132383233131913371349610264306519677368756965940393649592993310077108731124311369113951155240594101405739983277307526752899266617841290134413291342133111511389572614
Percentage of MinorityInterest100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets6.57.07.02.93.02.913.213.714.114.714.114.720.119.819.920.420.621.422.022.522.523.211.614.514.915.112.812.411.013.613.210.07.85.15.25.45.34.85.52.32.4

Stockholders Equity

us-gaap:StockholdersEquity



Period End2019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-03-312009-12-312008-12-31
Value13363136211384814406146601561093459473965681098306844446434860483056916148738779288212877791297863461648644948469447954752309229611940179379097716753772887025757384478440
Percentage of StockholdersEquity100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets29.029.429.831.332.433.120.220.120.817.617.017.89.910.310.011.712.514.515.516.317.418.322.516.317.918.718.319.319.514.514.610.910.930.230.030.029.229.530.133.432.5

Common Stock Value

us-gaap:CommonStockValue



Period End2019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-03-312009-12-312008-12-31
Value124712471246124612451245862862861861861861785785785785784784784783782782782720718718718717716662661630626623623622620619619618613
Percentage of CommonStockValue100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets2.72.72.72.72.72.61.91.81.91.91.81.81.71.71.61.61.61.51.51.61.51.62.22.52.62.72.82.92.93.13.33.53.82.42.42.52.52.62.52.42.4

Retained Earnings Accumulated Deficit

us-gaap:RetainedEarningsAccumulatedDeficit



Period End2019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-03-312009-12-312008-12-31
Value-11002-10664-10423-10270-10002-9018-8735-8587-8434-9872-9654-9487-9649-9483-9394-8508-7960-6764-6243-5914-5548-5315-6574-6385-6248-5973-5863-5765-5695-5648-5607-5551-582033-122-230-478-578646903874
Percentage of RetainedEarningsAccumulatedDeficit100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets-23.9-23.0-22.4-22.3-22.1-19.1-18.8-18.3-18.2-21.4-19.8-20.0-20.6-20.1-19.5-17.4-16.2-13.3-12.2-11.7-11.0-10.7-18.8-22.6-23.0-22.6-22.9-23.2-23.4-26.6-27.7-31.2-35.30.1-0.5-0.9-1.9-2.42.63.63.4

Treasury Stock Value

Accumulated Other Comprehensive Income Loss Net Of Tax

us-gaap:AccumulatedOtherComprehensiveIncomeLossNetOfTax



Period End2019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-03-312009-12-312008-12-312007-12-31
Value-199-266-265-267-270-291-293-294-238-331-331-334-339-331-369-378-442-425-384-395-341-222-194-223-164-338-394-374-362-330-357-367-389-74-95-116-82343-168-80-121
Percentage of AccumulatedOtherComprehensiveIncomeLossNetOfTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets-0.4-0.6-0.6-0.6-0.6-0.6-0.6-0.6-0.5-0.7-0.7-0.7-0.7-0.7-0.8-0.8-0.9-0.8-0.8-0.8-0.7-0.4-0.6-0.8-0.6-1.3-1.5-1.5-1.5-1.6-1.8-2.1-2.4-0.3-0.4-0.5-0.30.10.0-0.7-0.30.0

us-gaap:StatementEquityComponents

us-gaap:AccumulatedDefinedBenefitPlansAdjustment



Period End2019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-31
Value-196-263-262-264-267-278-282-291-235-326-330-334-337-329-333-334-338-352-359-365-371-276-281-286-291-475-511-521-530
Percentage of AccumulatedOtherComprehensiveIncomeLossNetOfTax98.598.998.998.998.995.596.299.098.798.599.7100.099.499.490.288.476.582.893.592.4108.8124.3144.8128.3177.4140.5129.7139.3146.4
Percentage of Assets-0.4-0.6-0.6-0.6-0.6-0.6-0.6-0.6-0.5-0.7-0.7-0.7-0.7-0.7-0.7-0.7-0.7-0.7-0.7-0.7-0.7-0.6-0.8-1.0-1.1-1.8-2.0-2.1-2.2
Percentage of Assets us-gaap:AccumulatedDefinedBenefitPlansAdjustment0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:AccumulatedNetGainLossFromDesignatedOrQualifyingCashFlowHedges



Period End2019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-31
Value-2-2-2-2-2-12-10-2-2-31200-1-1-1-1-1-1-1-1-1-1-1-1-1-1-1
Percentage of AccumulatedOtherComprehensiveIncomeLossNetOfTax1.00.80.80.70.74.13.40.70.80.9-0.3-0.6-0.0-0.00.30.30.20.20.30.30.30.50.50.40.60.30.30.30.3
Percentage of Assets-0.0-0.0-0.0-0.0-0.0-0.0-0.0-0.0-0.0-0.00.00.00.00.0-0.0-0.0-0.0-0.0-0.0-0.0-0.0-0.0-0.0-0.0-0.0-0.0-0.0-0.0-0.0
Percentage of Assets us-gaap:AccumulatedNetGainLossFromDesignatedOrQualifyingCashFlowHedges0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:AccumulatedOtherComprehensiveIncome



Period End2019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302014-12-31
Value-199-266-265-267-270-291-293-294-238-331-331-334-339-331-369-378-442-425-384-341
Percentage of AccumulatedOtherComprehensiveIncomeLossNetOfTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets-0.4-0.6-0.6-0.6-0.6-0.6-0.6-0.6-0.5-0.7-0.7-0.7-0.7-0.7-0.8-0.8-0.9-0.8-0.8-0.7
Percentage of Assets us-gaap:AccumulatedOtherComprehensiveIncome0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:AccumulatedTranslationAdjustment



Period End2019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-31
Value-1-1-1-1-1-1-1-1-1-2-2-2-2-2-35-43-103-72-24-2931558864128138118148169
Percentage of AccumulatedOtherComprehensiveIncomeLossNetOfTax0.50.40.40.40.40.30.30.30.40.60.60.60.60.69.511.423.316.96.27.3-9.1-24.8-45.4-28.7-78.0-40.8-29.9-39.6-46.7
Percentage of Assets-0.0-0.0-0.0-0.0-0.0-0.0-0.0-0.0-0.0-0.0-0.0-0.0-0.0-0.0-0.1-0.1-0.2-0.1-0.0-0.10.10.10.30.20.50.50.50.60.7
Percentage of Assets us-gaap:AccumulatedTranslationAdjustment0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

Net Cash Provided By Used In Operating Activities

us-gaap:NetCashProvidedByUsedInOperatingActivities



Period End2019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-03-312009-03-31
Value9918581069775962746891694719569662606158261868577959260381466910113453134466684955464314244341087668873811710644617512
Percentage of NetCashProvidedByUsedInOperatingActivities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Revenues47.042.952.437.743.632.442.633.232.330.134.430.572.032.439.546.929.533.544.339.047.216.718.725.537.827.329.224.623.021.5-6394.124.732.731.529.328.023.826.6

Net Cash Provided By Used In Investing Activities

us-gaap:NetCashProvidedByUsedInInvestingActivities



Period End2019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-03-312009-03-31
Value-483-920-166-1258258-1314-871-798-4231566-388-122-16346-400-346-592-705-1246-756-1147-1074-6944-992-918-808-3241-790-2399-491-1015-789-620-579-1824-1539-435-621
Percentage of NetCashProvidedByUsedInInvestingActivities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Revenues-22.9-46.0-8.1-61.211.7-57.1-41.7-38.2-19.082.8-20.2-6.1-0.718.2-23.0-20.8-29.5-39.2-67.8-44.1-53.6-51.9-413.8-56.7-52.0-44.6-173.4-45.1-130.0-24.35970.6-29.2-23.2-22.5-75.2-66.8-16.8-32.3

Net Cash Provided By Used In Financing Activities

us-gaap:NetCashProvidedByUsedInFinancingActivities



Period End2019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-03-312009-03-31
Value-466-497-140358-1094335-1037497-569-28811005-15-1473-1036-300-369-252329518874171642792937217625386761554268-179-49-10-104894309-405456
Percentage of NetCashProvidedByUsedInFinancingActivities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Revenues-22.1-24.9-6.917.4-49.614.5-49.623.8-25.5-152.452.2-0.8-67.0-54.4-17.3-22.2-1.21.316.011.03.58.3383.053.121.19.7135.838.684.213.31052.9-1.8-0.4-4.036.913.4-15.623.7

Net Cash Provided By Used In Operating Activities

us-gaap:NetCashProvidedByUsedInOperatingActivities



Period End2019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-03-312009-03-31
Value9918581069775962746891694719569662606158261868577959260381466910113453134466684955464314244341087668873811710644617512
Percentage of NetCashProvidedByUsedInOperatingActivities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Revenues47.042.952.437.743.632.442.633.232.330.134.430.572.032.439.546.929.533.544.339.047.216.718.725.537.827.329.224.623.021.5-6394.124.732.731.529.328.023.826.6

Net Income Loss

us-gaap:NetIncomeLoss



Period End2019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-09-302009-03-31
Value124221310195-57112913515216873381373-1561-405-65-715-40114701931678103140141142161149155132423-444272227321174-1263185-193143-172
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 Revenues5.911.115.29.5-25.95.66.57.375.71.74.218.8-0.73.2-23.3-3.9-35.6-2.26.24.19.081.16.18.08.78.08.98.08.87.221.02611.810.18.512.57.2-54.88.1-7.46.8-8.9

Profit Loss

us-gaap:ProfitLoss



Period End2019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-09-302009-03-31
Value-66242324214-546200269270162212519356937131-505-13-1337-173183133081708127196197192230202203165495-362342297384228-1226222-146194-224
Percentage of ProfitLoss100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Revenues-3.112.115.910.4-24.88.712.912.972.86.610.028.61.76.9-29.1-0.8-66.7-9.610.00.814.482.67.611.212.110.912.710.811.68.924.52129.412.711.114.99.4-53.29.7-5.69.2-11.7

us-gaap:StatementEquityComponents

us-gaap:NoncontrollingInterest



Period End2019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-09-302009-03-31
Value-1902114192571134118-65921121965270-10052-622-13369-57115302456506953483372827070635437374751-52
Percentage of ProfitLoss287.98.74.38.9-4.635.549.843.7-4.073.658.034.4140.553.419.8-400.046.576.937.7-438.537.31.818.928.626.030.026.223.620.014.5-22.720.523.616.423.7-3.016.7-32.226.323.2
Percentage of Revenues-9.01.10.70.91.13.16.45.7-2.94.95.89.92.43.7-5.83.1-31.0-7.43.8-3.35.41.41.43.22.83.82.82.71.83.6-482.42.62.62.42.21.61.61.82.4-2.7
Percentage of Revenues us-gaap:NoncontrollingInterest0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:Parent



Period End2019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312009-09-302009-03-31
Value124221310195-57112913515216873381373-1561-405-65-715-40114701931678103140142161149155132423-444272227321174-1263185-193172143-172
Percentage of ProfitLoss-187.991.395.791.1104.664.550.256.3104.026.442.065.6-40.546.680.2500.053.523.162.3538.562.798.281.171.474.070.073.876.480.085.5122.779.576.483.676.3103.083.3132.20.073.776.8
Percentage of Revenues5.911.115.29.5-25.95.66.57.375.71.74.218.8-0.73.2-23.3-3.9-35.6-2.26.24.19.081.16.18.08.08.98.08.87.221.02611.810.18.512.57.2-54.88.1-7.40.06.8-8.9
Percentage of Revenues us-gaap:Parent0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:RetainedEarnings



Period End2019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-06-302013-03-312012-12-312012-09-302012-06-302012-03-31
Value124221310195-57112913515216873381373-1561-405-65-715-40114701931678103140142161149155132423
Percentage of ProfitLoss-187.991.395.791.1104.664.550.256.3104.026.442.065.6-40.546.680.2500.053.523.162.3538.562.798.281.171.474.070.073.876.480.085.5
Percentage of Revenues5.911.115.29.5-25.95.66.57.375.71.74.218.8-0.73.2-23.3-3.9-35.6-2.26.24.19.081.16.18.08.08.98.08.87.221.0
Percentage of Revenues 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

Depreciation Depletion And Amortization

us-gaap:DepreciationDepletionAndAmortization



Period End2019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-03-312009-03-31
Value439435424416435425434431428433433442437435446445451432428427379369214214207198210211196181168412418403381406374361367
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

Increase Decrease In Inventories

us-gaap:IncreaseDecreaseInInventories



Period End2019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-03-312009-03-31
Value2-3-3-1-236-740-31-7030184-1316-29-12-32-32-5385427-151314-9-2717-45518-3832-8013
Percentage of IncreaseDecreaseInInventories100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0100.0

Net Cash Provided By Used In Investing Activities

us-gaap:NetCashProvidedByUsedInInvestingActivities



Period End2019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-03-312009-03-31
Value-483-920-166-1258258-1314-871-798-4231566-388-122-16346-400-346-592-705-1246-756-1147-1074-6944-992-918-808-3241-790-2399-491-1015-789-620-579-1824-1539-435-621
Percentage of NetCashProvidedByUsedInInvestingActivities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Revenues-22.9-46.0-8.1-61.211.7-57.1-41.7-38.2-19.082.8-20.2-6.1-0.718.2-23.0-20.8-29.5-39.2-67.8-44.1-53.6-51.9-413.8-56.7-52.0-44.6-173.4-45.1-130.0-24.35970.6-29.2-23.2-22.5-75.2-66.8-16.8-32.3

Payments To Acquire Property Plant And Equipment

us-gaap:PaymentsToAcquirePropertyPlantAndEquipment



Period End2019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-06-302013-03-31
Value404786497422597769933957699644545511474508556513742771822832108811041046793817713
Percentage of PaymentsToAcquirePropertyPlantAndEquipment100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Payments To Acquire Investments

Net Cash Provided By Used In Financing Activities

us-gaap:NetCashProvidedByUsedInFinancingActivities



Period End2019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-03-312009-03-31
Value-466-497-140358-1094335-1037497-569-28811005-15-1473-1036-300-369-252329518874171642792937217625386761554268-179-49-10-104894309-405456
Percentage of NetCashProvidedByUsedInFinancingActivities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Revenues-22.1-24.9-6.917.4-49.614.5-49.623.8-25.5-152.452.2-0.8-67.0-54.4-17.3-22.2-1.21.316.011.03.58.3383.053.121.19.7135.838.684.213.31052.9-1.8-0.4-4.036.913.4-15.623.7

Proceeds From Issuance Of Long Term Debt

us-gaap:ProceedsFromIssuanceOfLongTermDebt



Period End2019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-03-312009-03-31
Value31161270818115661312048320370217347082012051815268828871165465525511871199343914969357701377160950002072675350759504303749595
Percentage of ProceedsFromIssuanceOfLongTermDebt100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0100.0100.0100.0100.0100.0100.0100.0100.0

Repayments Of Long Term Debt

us-gaap:RepaymentsOfLongTermDebt



Period End2019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-03-312009-03-31
Value536486431440701106045027657102000212516651310199195364112743648964864001186895155113315525123159915075352438-3407-31
Percentage of RepaymentsOfLongTermDebt100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of LongTermDebtAndCapitalLeaseObligations0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

Payments For Repurchase Of Common Stock

Repayments Of Long Term Debt

us-gaap:RepaymentsOfLongTermDebt



Period End2019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-03-312009-03-31
Value536486431440701106045027657102000212516651310199195364112743648964864001186895155113315525123159915075352438-3407-31
Percentage of RepaymentsOfLongTermDebt100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of LongTermDebtAndCapitalLeaseObligations0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

Debt Instrument Interest Rate Stated Percentage

us-gaap:DebtInstrument, dei:LegalEntity

us-gaap:DebtInstrumentInterestRateStatedPercentage

wmb:A3.35PercentSeniorUnsecuredNotesDue2022, wmb:WilliamsCompaniesInc



Period End2019-12-31
Value0.0335
Percentage of DebtInstrumentInterestRateStatedPercentage100.0
Percentage of LongTermDebtAndCapitalLeaseObligations0.0
Percentage of LongTermDebtAndCapitalLeaseObligations wmb:A3.35PercentSeniorUnsecuredNotesDue2022 wmb:WilliamsCompaniesInc0.0

wmb:A3.6PercentSeniorUnsecuredNotesDue2022, wmb:WilliamsCompaniesInc



Period End2019-12-31
Value0.036
Percentage of DebtInstrumentInterestRateStatedPercentage107.5
Percentage of LongTermDebtAndCapitalLeaseObligations0.0
Percentage of LongTermDebtAndCapitalLeaseObligations wmb:A3.6PercentSeniorUnsecuredNotesDue2022 wmb:WilliamsCompaniesInc0.0

wmb:A3.75PercentSeniorUnsecuredNotesDue2027, wmb:WilliamsCompaniesInc



Period End2019-12-31
Value0.0375
Percentage of DebtInstrumentInterestRateStatedPercentage111.9
Percentage of LongTermDebtAndCapitalLeaseObligations0.0
Percentage of LongTermDebtAndCapitalLeaseObligations wmb:A3.75PercentSeniorUnsecuredNotesDue2027 wmb:WilliamsCompaniesInc0.0

wmb:A3.7PercentSeniorUnsecuredNotesDue2023, wmb:WilliamsCompaniesInc



Period End2019-12-31
Value0.037
Percentage of DebtInstrumentInterestRateStatedPercentage110.4
Percentage of LongTermDebtAndCapitalLeaseObligations0.0
Percentage of LongTermDebtAndCapitalLeaseObligations wmb:A3.7PercentSeniorUnsecuredNotesDue2023 wmb:WilliamsCompaniesInc0.0

wmb:A3.9PercentSeniorUnsecuredNotesDue2025, wmb:WilliamsCompaniesInc



Period End2019-12-31
Value0.039
Percentage of DebtInstrumentInterestRateStatedPercentage116.4
Percentage of LongTermDebtAndCapitalLeaseObligations0.0
Percentage of LongTermDebtAndCapitalLeaseObligations wmb:A3.9PercentSeniorUnsecuredNotesDue2025 wmb:WilliamsCompaniesInc0.0

wmb:A4.125PercentSeniorUnsecuredNotesDue2020, wmb:WilliamsCompaniesInc



Period End2019-12-31
Value0.04125
Percentage of DebtInstrumentInterestRateStatedPercentage123.1
Percentage of LongTermDebtAndCapitalLeaseObligations0.0
Percentage of LongTermDebtAndCapitalLeaseObligations wmb:A4.125PercentSeniorUnsecuredNotesDue2020 wmb:WilliamsCompaniesInc0.0

wmb:A4.3PercentSeniorUnsecuredNotesDue2024, wmb:WilliamsCompaniesInc



Period End2019-12-31
Value0.043
Percentage of DebtInstrumentInterestRateStatedPercentage128.4
Percentage of LongTermDebtAndCapitalLeaseObligations0.0
Percentage of LongTermDebtAndCapitalLeaseObligations wmb:A4.3PercentSeniorUnsecuredNotesDue2024 wmb:WilliamsCompaniesInc0.0

wmb:A4.45PercentSeniorUnsecuredNotesDue2042, wmb:TranscontinentalGasPipeLineCompanyLLC



Period End2019-12-31
Value0.0445
Percentage of DebtInstrumentInterestRateStatedPercentage132.8
Percentage of LongTermDebtAndCapitalLeaseObligations0.0
Percentage of LongTermDebtAndCapitalLeaseObligations wmb:A4.45PercentSeniorUnsecuredNotesDue2042 wmb:TranscontinentalGasPipeLineCompanyLLC0.0

wmb:A4.55PercentSeniorUnsecuredNotesDue2024, wmb:WilliamsCompaniesInc



Period End2019-12-31
Value0.0455
Percentage of DebtInstrumentInterestRateStatedPercentage135.8
Percentage of LongTermDebtAndCapitalLeaseObligations0.0
Percentage of LongTermDebtAndCapitalLeaseObligations wmb:A4.55PercentSeniorUnsecuredNotesDue2024 wmb:WilliamsCompaniesInc0.0

wmb:A4.5PercentSeniorUnsecuredNotesDue2023, wmb:WilliamsCompaniesInc



Period End2019-12-31
Value0.045
Percentage of DebtInstrumentInterestRateStatedPercentage134.3
Percentage of LongTermDebtAndCapitalLeaseObligations0.0
Percentage of LongTermDebtAndCapitalLeaseObligations wmb:A4.5PercentSeniorUnsecuredNotesDue2023 wmb:WilliamsCompaniesInc0.0

wmb:A4.85PercentSeniorUnsecuredNotesDue2048, wmb:WilliamsCompaniesInc



Period End2019-12-31
Value0.0485
Percentage of DebtInstrumentInterestRateStatedPercentage144.8
Percentage of LongTermDebtAndCapitalLeaseObligations0.0
Percentage of LongTermDebtAndCapitalLeaseObligations wmb:A4.85PercentSeniorUnsecuredNotesDue2048 wmb:WilliamsCompaniesInc0.0

wmb:A4.9PercentSeniorUnsecuredNotesDue2045, wmb:WilliamsCompaniesInc



Period End2019-12-31
Value0.049
Percentage of DebtInstrumentInterestRateStatedPercentage146.3
Percentage of LongTermDebtAndCapitalLeaseObligations0.0
Percentage of LongTermDebtAndCapitalLeaseObligations wmb:A4.9PercentSeniorUnsecuredNotesDue2045 wmb:WilliamsCompaniesInc0.0

wmb:A4PercentSeniorUnsecuredNotesDue2021, wmb:WilliamsCompaniesInc



Period End2019-12-31
Value0.04
Percentage of DebtInstrumentInterestRateStatedPercentage119.4
Percentage of LongTermDebtAndCapitalLeaseObligations0.0
Percentage of LongTermDebtAndCapitalLeaseObligations wmb:A4PercentSeniorUnsecuredNotesDue2021 wmb:WilliamsCompaniesInc0.0

wmb:A4PercentSeniorUnsecuredNotesDue2025, wmb:WilliamsCompaniesInc



Period End2019-12-31
Value0.04
Percentage of DebtInstrumentInterestRateStatedPercentage119.4
Percentage of LongTermDebtAndCapitalLeaseObligations0.0
Percentage of LongTermDebtAndCapitalLeaseObligations wmb:A4PercentSeniorUnsecuredNotesDue2025 wmb:WilliamsCompaniesInc0.0

wmb:A5.1PercentSeniorUnsecuredNotesDue2045, wmb:WilliamsCompaniesInc



Period End2019-12-31
Value0.051
Percentage of DebtInstrumentInterestRateStatedPercentage152.2
Percentage of LongTermDebtAndCapitalLeaseObligations0.0
Percentage of LongTermDebtAndCapitalLeaseObligations wmb:A5.1PercentSeniorUnsecuredNotesDue2045 wmb:WilliamsCompaniesInc0.0

wmb:A5.25PercentSeniorUnsecuredNotesDue2020, wmb:WilliamsCompaniesInc



Period End2019-12-31
Value0.0525
Percentage of DebtInstrumentInterestRateStatedPercentage156.7
Percentage of LongTermDebtAndCapitalLeaseObligations0.0
Percentage of LongTermDebtAndCapitalLeaseObligations wmb:A5.25PercentSeniorUnsecuredNotesDue2020 wmb:WilliamsCompaniesInc0.0

wmb:A5.4PercentSeniorUnsecuredNotesDue2041, wmb:TranscontinentalGasPipeLineCompanyLLC



Period End2019-12-31
Value0.054
Percentage of DebtInstrumentInterestRateStatedPercentage161.2
Percentage of LongTermDebtAndCapitalLeaseObligations0.0
Percentage of LongTermDebtAndCapitalLeaseObligations wmb:A5.4PercentSeniorUnsecuredNotesDue2041 wmb:TranscontinentalGasPipeLineCompanyLLC0.0

wmb:A5.4PercentSeniorUnsecuredNotesDue2044, wmb:WilliamsCompaniesInc



Period End2019-12-31
Value0.054
Percentage of DebtInstrumentInterestRateStatedPercentage161.2
Percentage of LongTermDebtAndCapitalLeaseObligations0.0
Percentage of LongTermDebtAndCapitalLeaseObligations wmb:A5.4PercentSeniorUnsecuredNotesDue2044 wmb:WilliamsCompaniesInc0.0

wmb:A5.75PercentSeniorUnsecuredNotesDue2044, wmb:WilliamsCompaniesInc



Period End2019-12-31
Value0.0575
Percentage of DebtInstrumentInterestRateStatedPercentage171.6
Percentage of LongTermDebtAndCapitalLeaseObligations0.0
Percentage of LongTermDebtAndCapitalLeaseObligations wmb:A5.75PercentSeniorUnsecuredNotesDue2044 wmb:WilliamsCompaniesInc0.0

wmb:A5.8PercentSeniorUnsecuredNotesDue2043, wmb:WilliamsCompaniesInc



Period End2019-12-31
Value0.058
Percentage of DebtInstrumentInterestRateStatedPercentage173.1
Percentage of LongTermDebtAndCapitalLeaseObligations0.0
Percentage of LongTermDebtAndCapitalLeaseObligations wmb:A5.8PercentSeniorUnsecuredNotesDue2043 wmb:WilliamsCompaniesInc0.0

wmb:A6.3PercentSeniorUnsecuredNotesDue2040, wmb:WilliamsCompaniesInc



Period End2019-12-31
Value0.063
Percentage of DebtInstrumentInterestRateStatedPercentage188.1
Percentage of LongTermDebtAndCapitalLeaseObligations0.0
Percentage of LongTermDebtAndCapitalLeaseObligations wmb:A6.3PercentSeniorUnsecuredNotesDue2040 wmb:WilliamsCompaniesInc0.0

wmb:A7.08PercentDebenturesDue2026, wmb:TranscontinentalGasPipeLineCompanyLLC



Period End2019-12-31
Value0.0708
Percentage of DebtInstrumentInterestRateStatedPercentage211.3
Percentage of LongTermDebtAndCapitalLeaseObligations0.0
Percentage of LongTermDebtAndCapitalLeaseObligations wmb:A7.08PercentDebenturesDue2026 wmb:TranscontinentalGasPipeLineCompanyLLC0.0

wmb:A7.125PercentDebenturesDue2025, wmb:NorthwestPipelineLLC



Period End2019-12-31
Value0.07125
Percentage of DebtInstrumentInterestRateStatedPercentage212.7
Percentage of LongTermDebtAndCapitalLeaseObligations0.0
Percentage of LongTermDebtAndCapitalLeaseObligations wmb:A7.125PercentDebenturesDue2025 wmb:NorthwestPipelineLLC0.0

wmb:A7.25PercentDebenturesDue2026, wmb:TranscontinentalGasPipeLineCompanyLLC



Period End2019-12-31
Value0.0725
Percentage of DebtInstrumentInterestRateStatedPercentage216.4
Percentage of LongTermDebtAndCapitalLeaseObligations0.0
Percentage of LongTermDebtAndCapitalLeaseObligations wmb:A7.25PercentDebenturesDue2026 wmb:TranscontinentalGasPipeLineCompanyLLC0.0

wmb:A7.5PercentDebenturesDue2031, wmb:WilliamsCompaniesInc



Period End2019-12-31
Value0.075
Percentage of DebtInstrumentInterestRateStatedPercentage223.9
Percentage of LongTermDebtAndCapitalLeaseObligations0.0
Percentage of LongTermDebtAndCapitalLeaseObligations wmb:A7.5PercentDebenturesDue2031 wmb:WilliamsCompaniesInc0.0

wmb:A7.75PercentSeniorUnsecuredNotesDue2031, wmb:WilliamsCompaniesInc



Period End2019-12-31
Value0.0775
Percentage of DebtInstrumentInterestRateStatedPercentage231.3
Percentage of LongTermDebtAndCapitalLeaseObligations0.0
Percentage of LongTermDebtAndCapitalLeaseObligations wmb:A7.75PercentSeniorUnsecuredNotesDue2031 wmb:WilliamsCompaniesInc0.0

wmb:A7.85PercentSeniorUnsecuredNotesDue2026, wmb:TranscontinentalGasPipeLineCompanyLLC



Period End2019-12-31
Value0.0785
Percentage of DebtInstrumentInterestRateStatedPercentage234.3
Percentage of LongTermDebtAndCapitalLeaseObligations0.0
Percentage of LongTermDebtAndCapitalLeaseObligations wmb:A7.85PercentSeniorUnsecuredNotesDue2026 wmb:TranscontinentalGasPipeLineCompanyLLC0.0

wmb:A7.875PercentSeniorUnsecuredNotesDue2021, wmb:WilliamsCompaniesInc



Period End2019-12-31
Value0.07875
Percentage of DebtInstrumentInterestRateStatedPercentage235.1
Percentage of LongTermDebtAndCapitalLeaseObligations0.0
Percentage of LongTermDebtAndCapitalLeaseObligations wmb:A7.875PercentSeniorUnsecuredNotesDue2021 wmb:WilliamsCompaniesInc0.0

wmb:A8.75PercentSeniorUnsecuredNotesDue2032, wmb:WilliamsCompaniesInc



Period End2019-12-31
Value0.0875
Percentage of DebtInstrumentInterestRateStatedPercentage261.2
Percentage of LongTermDebtAndCapitalLeaseObligations0.0
Percentage of LongTermDebtAndCapitalLeaseObligations wmb:A8.75PercentSeniorUnsecuredNotesDue2032 wmb:WilliamsCompaniesInc0.0

wmb:FinancingObligationsApproxIntRate, wmb:TranscontinentalGasPipeLineCompanyLLC



Period End2019-12-31
Value0.09
Percentage of DebtInstrumentInterestRateStatedPercentage268.7
Percentage of LongTermDebtAndCapitalLeaseObligations0.0
Percentage of LongTermDebtAndCapitalLeaseObligations wmb:FinancingObligationsApproxIntRate wmb:TranscontinentalGasPipeLineCompanyLLC0.0

wmb:Various7.625PercentTo10.25PercentSeniorUnsecuredNotesAndDebenturesDue2019To2027MaximumInterestRate, wmb:WilliamsCompaniesInc



Period End2019-12-31
Value0.1025
Percentage of DebtInstrumentInterestRateStatedPercentage306.0
Percentage of LongTermDebtAndCapitalLeaseObligations0.0
Percentage of LongTermDebtAndCapitalLeaseObligations wmb:Various7.625PercentTo10.25PercentSeniorUnsecuredNotesAndDebenturesDue2019To2027MaximumInterestRate wmb:WilliamsCompaniesInc0.0

wmb:Various7.625PercentTo10.25PercentSeniorUnsecuredNotesAndDebenturesDue2019To2027MinimumInterestRate, wmb:WilliamsCompaniesInc



Period End2019-12-31
Value0.07625
Percentage of DebtInstrumentInterestRateStatedPercentage227.6
Percentage of LongTermDebtAndCapitalLeaseObligations0.0
Percentage of LongTermDebtAndCapitalLeaseObligations wmb:Various7.625PercentTo10.25PercentSeniorUnsecuredNotesAndDebenturesDue2019To2027MinimumInterestRate wmb:WilliamsCompaniesInc0.0

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

wmb:A8.75PercentSeniorUnsecuredNotesDue2020, us-gaap:SubsequentEvent, wmb:WilliamsCompaniesInc



Period End2020-01-15
Value0.0875
Percentage of DebtInstrumentInterestRateStatedPercentage0.0
Percentage of LongTermDebtAndCapitalLeaseObligations0.0
Percentage of LongTermDebtAndCapitalLeaseObligations wmb:A8.75PercentSeniorUnsecuredNotesDue2020 us-gaap:SubsequentEvent wmb:WilliamsCompaniesInc0.0

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

us-gaap:AwardType, us-gaap:PlanName

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber

us-gaap:EmployeeStockOption, wmb:WilliamsCompaniesIncentivePlan



Period End2019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-31
Value6766556
Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber100.0100.0100.0100.0100.0100.0100.0

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

us-gaap:AwardType, us-gaap:PlanName

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice

us-gaap:EmployeeStockOption, wmb:WilliamsCompaniesIncentivePlan



Period End2019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-31
Value32.6431.5531.5331.3231.5125.8621.82
Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice100.0100.0100.0100.0100.0100.0100.0

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

Share Based Compensation

us-gaap:ShareBasedCompensation



Period End2019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-12-31
Value131416141213161417172321182113211719232317131211119999916111114111112147
Percentage of ShareBasedCompensation100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Deferred Tax Liabilities

us-gaap:DeferredTaxLiabilities



Period End2019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-312010-12-312009-12-31
Value17821524314742384176464535022724217441204323
Percentage of DeferredTaxLiabilities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Deferred Tax Assets Net

us-gaap:DeferredTaxAssetsNet



Period End2019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-312010-12-312009-12-31
Value1632111843710911115841338528566588677
Percentage of DeferredTaxAssetsNet100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Unrecognized Tax Benefits

us-gaap:UnrecognizedTaxBenefits



Period End2019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-312010-12-312009-12-312008-12-31
Value515150505589665838918979
Percentage of UnrecognizedTaxBenefits100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Deferred Tax Assets Valuation Allowance

us-gaap:DeferredTaxAssetsValuationAllowance



Period End2019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-312010-12-312009-12-31
Value319320224334190206181144145249289
Percentage of DeferredTaxAssetsValuationAllowance100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Unrecognized Tax Benefits Increases Resulting From Current Period Tax Positions

Operating Lease Right Of Use Asset

us-gaap:OperatingLeaseRightOfUseAsset



Period End2019-12-312019-09-302019-06-302019-03-31
Value207213221223
Percentage of OperatingLeaseRightOfUseAsset100.0100.0100.0100.0

Cash And Cash Equivalents Period Increase Decrease

us-gaap:CashAndCashEquivalentsPeriodIncreaseDecrease



Period End2019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-03-312009-03-31
Value42-559763-125126-233-1017393-273-74612794699364-25-79-137101-62-558-204383122-137-157317-421211-107-170243128-220-586-223347
Percentage of CashAndCashEquivalentsPeriodIncreaseDecrease100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:IncomeStatementLocation, us-gaap:StatementBusinessSegments

us-gaap:AmortizationOfRegulatoryAsset

us-gaap:OtherOperatingIncomeExpense, wmb:AtlanticGulf



Period End2019-12-312019-09-302019-06-302018-12-312018-09-302018-06-302017-12-312017-09-30
Value41898888
Percentage of AmortizationOfRegulatoryAsset100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:AssetImpairmentCharges



Period End2019-12-312019-09-302019-06-302018-12-312018-09-302018-06-302017-12-312017-09-302017-06-302016-09-302016-06-302015-09-302015-06-302012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-03-312009-03-31
Value388064184906613121025180222400007527920311517104339
Percentage of AssetImpairmentCharges100.00.0100.0100.00.0100.0100.0100.0100.0100.0100.0100.0100.00.00.00.00.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:IncomeStatementLocation, us-gaap:StatementBusinessSegments

us-gaap:AssetRetirementObligationRevisionOfEstimate

us-gaap:OtherOperatingIncomeExpense, wmb:AtlanticGulf



Period End2019-12-312019-09-302018-12-312018-09-302017-12-312017-09-30
Value0022-105-5
Percentage of AssetRetirementObligationRevisionOfEstimate0.00.0100.0100.0100.0100.0

us-gaap:StatementScenario, us-gaap:BusinessAcquisition

us-gaap:BusinessAcquisitionsProFormaNetIncomeLoss

srt:ProForma, wmb:UticaEastOhioMidstreamLLCAcquisition



Period End2019-12-312019-09-302018-12-312018-09-30
Value124221-562138
Percentage of BusinessAcquisitionsProFormaNetIncomeLoss100.0100.0100.0100.0

us-gaap:StatementScenario, us-gaap:BusinessAcquisition

us-gaap:BusinessAcquisitionsProFormaRevenue

srt:ProForma, wmb:UticaEastOhioMidstreamLLCAcquisition



Period End2019-12-312019-09-302018-12-312018-09-30
Value2107199922472342
Percentage of BusinessAcquisitionsProFormaRevenue100.0100.0100.0100.0

us-gaap:CommonStockDividendsPerShareDeclared



Period End2019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-09-302009-03-31
Value0.38000000000000010.380.380.380.34000000000000010.340.340.340.299999999999999930.30.30.30.199999999999999960.20.640.640.64000000000000010.640.590.580.57000000000000010.560.4250.40250.366250.35250.338750.325000000000000070.31250.30.258750.250.20.20.1250.1250.1250.1250.110.110.11
Percentage of CommonStockDividendsPerShareDeclared100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:SubsequentEventType

us-gaap:SubsequentEvent



Period End2020-01-282019-02-202018-02-212017-02-20
Value0.40.380.340.3
Percentage of CommonStockDividendsPerShareDeclared0.00.00.00.0

us-gaap:ConsolidationLessThanWhollyOwnedSubsidiaryParentOwnershipInterestChangesNet



Period End2019-12-312019-09-302019-06-302018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302010-12-312010-09-30
Value-1114100-2-2-3-5-1-90136-37-2-30-2-1978-11443-1-68-67-76-88-1850000
Percentage of ConsolidationLessThanWhollyOwnedSubsidiaryParentOwnershipInterestChangesNet100.0100.0100.00.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.00.00.00.0

us-gaap:StatementEquityComponents

us-gaap:AccumulatedOtherComprehensiveIncome



Period End2019-12-312019-09-302019-06-302018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-06-302013-03-312012-12-312012-09-302012-06-302012-03-31
Value0000000000000000000000-20000000
Percentage of ConsolidationLessThanWhollyOwnedSubsidiaryParentOwnershipInterestChangesNet-0.00.00.00.00.0-0.0-0.0-0.0-0.0-0.0-0.00.0-0.0-0.0-0.00.0-0.0-0.00.00.0-0.00.0-46.5-0.0-0.0-0.0-0.0-0.0-0.0

us-gaap:AdditionalPaidInCapital



Period End2019-12-312019-09-302019-06-302018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-06-302013-03-312012-12-312012-09-302012-06-302012-03-31
Value0-1-42501670-121496-596155-223-163-1117-7-721114113126147313
Percentage of ConsolidationLessThanWhollyOwnedSubsidiaryParentOwnershipInterestChangesNet-0.0-100.0-301.40.00.0-300.0-350.0-0.020.0-200.0-166.0-163.9-164.9-250.0-166.70.0-100.0-300.0-168.0-137.5-154.5-175.0-167.4-100.0-167.6-168.7-165.8-167.0-169.2

us-gaap:NoncontrollingInterest



Period End2019-12-312019-09-302019-06-302018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302010-12-312010-09-30
Value-125660-1-8-9-3-4-3-239795-98-7-82-4-426019-2811135-2-182-180-202-235-49800-30-256-275
Percentage of ConsolidationLessThanWhollyOwnedSubsidiaryParentOwnershipInterestChangesNet100.0200.0401.40.00.0400.0450.0100.080.0300.0266.0263.9264.9350.0266.70.0200.0400.0268.0237.5254.5275.0314.0200.0267.6268.7265.8267.0269.20.00.00.00.00.0

us-gaap:Parent



Period End2019-12-312019-09-302019-06-302018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302010-12-312010-09-30
Value0-1-42501670-121496-596155-223-163-1117-7-9211141131261473130030256275
Percentage of ConsolidationLessThanWhollyOwnedSubsidiaryParentOwnershipInterestChangesNet-0.0-100.0-301.40.00.0-300.0-350.0-0.020.0-200.0-166.0-163.9-164.9-250.0-166.70.0-100.0-300.0-168.0-137.5-154.5-175.0-214.0-100.0-167.6-168.7-165.8-167.0-169.20.00.00.00.00.0

us-gaap:StatementEquityComponents, dei:LegalEntity

us-gaap:AdditionalPaidInCapital, wmb:NortheastJV



Period End2019-12-312019-06-30
Value0-425
Percentage of ConsolidationLessThanWhollyOwnedSubsidiaryParentOwnershipInterestChangesNet-0.0-301.4

us-gaap:NoncontrollingInterest, wmb:NortheastJV



Period End2019-12-312019-06-30
Value-1566
Percentage of ConsolidationLessThanWhollyOwnedSubsidiaryParentOwnershipInterestChangesNet100.0401.4

us-gaap:ContractWithCustomerAssetCumulativeCatchUpAdjustmentToRevenueChangeInMeasureOfProgress



Period End2019-12-312019-09-302018-12-312018-09-30
Value9141317
Percentage of ContractWithCustomerAssetCumulativeCatchUpAdjustmentToRevenueChangeInMeasureOfProgress100.0100.0100.0100.0

us-gaap:ContractWithCustomerAssetReclassifiedToReceivable



Period End2019-12-312019-09-302018-12-312018-09-30
Value-320-650
Percentage of ContractWithCustomerAssetReclassifiedToReceivable100.00.0100.00.0

us-gaap:ContractWithCustomerLiabilityCumulativeCatchUpAdjustmentToRevenueChangeInMeasureOfProgress



Period End2019-12-312019-09-302018-12-312018-09-30
Value19124558
Percentage of ContractWithCustomerLiabilityCumulativeCatchUpAdjustmentToRevenueChangeInMeasureOfProgress100.0100.0100.0100.0

us-gaap:ContractWithCustomerLiabilityRevenueRecognized



Period End2019-12-312019-09-302019-06-302018-12-312018-09-302018-06-30
Value628-77-100790-112-113
Percentage of ContractWithCustomerLiabilityRevenueRecognized100.0100.0100.0100.0100.0100.0

us-gaap:CurrentFederalTaxExpenseBenefit



Period End2019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312009-09-30
Value-16-10-9-6-28-19-17-19570300000000-107-15-2413725-61-11-2158332186483017606670-113-34-12
Percentage of CurrentFederalTaxExpenseBenefit100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0100.00.00.00.00.00.00.00.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:CurrentForeignTaxExpenseBenefit



Period End2019-12-312019-09-302018-12-312018-09-302017-12-312017-09-302017-06-302016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312009-09-30
Value110000000-10-6122232322-12106321-171316-1812158507
Percentage of CurrentForeignTaxExpenseBenefit100.0100.00.00.00.00.00.00.00.0100.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0100.0

us-gaap:CurrentIncomeTaxExpenseBenefit



Period End2019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312009-09-30
Value-20-9-9-6-28-19-17-1811162911-10-69232-104-15-2214427-61-7-127440467664480758983-122-27-7
Percentage of CurrentIncomeTaxExpenseBenefit100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0100.0100.0100.0100.0100.0100.0

us-gaap:CurrentStateAndLocalTaxExpenseBenefit



Period End2019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312009-09-30
Value-5000000169261100-80100-2-15012-110447321385-147-2
Percentage of CurrentStateAndLocalTaxExpenseBenefit100.00.00.00.00.00.00.0100.0100.0100.0100.0100.0100.0100.00.00.0100.00.0100.00.00.0100.0100.0100.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DeconsolidationRevaluationOfRetainedInvestmentGainOrLossAmount



Period End2019-12-312019-09-302019-06-302018-12-312018-09-302018-06-30
Value-2700141062
Percentage of DeconsolidationRevaluationOfRetainedInvestmentGainOrLossAmount100.00.00.0100.00.0100.0

us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName

wmb:ConstitutionPipelineCompanyLLC



Period End2019-12-31
Value-27
Percentage of DeconsolidationRevaluationOfRetainedInvestmentGainOrLossAmount100.0

us-gaap:DeferredFederalIncomeTaxExpenseBenefit



Period End2019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312009-09-30
Value55739161-1291886064-2067-115915438-52-5-355-60732519891195-9621130829763087-122-1786-8119-219152313183
Percentage of DeferredFederalIncomeTaxExpenseBenefit100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DeferredIncomeTaxExpenseBenefit



Period End2019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312009-09-30
Value1118610775-1312096973-2111863284868-1442-378-6780282201013106-93351631039133187-146-997-637-240212816394
Percentage of DeferredIncomeTaxExpenseBenefit100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DeferredStateAndLocalIncomeTaxExpenseBenefit



Period End2019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312009-09-30
Value56131614-22199-4419413171-187-21-6-1316986-191913-4-3-3-3-26471-87-23332411
Percentage of DeferredStateAndLocalIncomeTaxExpenseBenefit100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:RetirementPlanType

us-gaap:DefinedBenefitPlanAmortizationOfGainsLosses

us-gaap:PensionPlansDefinedBenefit



Period End2019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-30
Value-4-3-4-4-6-6-5-6-7-6-7-7-7-8
Percentage of DefinedBenefitPlanAmortizationOfGainsLosses100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:RetirementPlanType

us-gaap:DefinedBenefitPlanAmortizationOfPriorServiceCostCredit

us-gaap:OtherPostretirementBenefitPlansDefinedBenefit



Period End2019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-30
Value0000-100-1-3-3-4-3-4-3
Percentage of DefinedBenefitPlanAmortizationOfPriorServiceCostCredit0.00.00.00.0100.00.00.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:RetirementPlanType

us-gaap:DefinedBenefitPlanContributionsByEmployer

us-gaap:OtherPostretirementBenefitPlansDefinedBenefit



Period End2019-12-312019-09-302018-12-312018-09-302018-06-302018-03-312017-12-31
Value1211211
Percentage of DefinedBenefitPlanContributionsByEmployer100.0100.0100.0100.0100.0100.0100.0

us-gaap:PensionPlansDefinedBenefit



Period End2019-12-312019-09-302018-12-312018-09-302018-06-302018-03-312017-12-31
Value0321424322
Percentage of DefinedBenefitPlanContributionsByEmployer0.01600.0100.04200.02150.0200.0200.0

us-gaap:RetirementPlanType

us-gaap:DefinedBenefitPlanExpectedReturnOnPlanAssets

us-gaap:OtherPostretirementBenefitPlansDefinedBenefit



Period End2019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-30
Value23323233233333
Percentage of DefinedBenefitPlanExpectedReturnOnPlanAssets100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:PensionPlansDefinedBenefit



Period End2019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-30
Value1515161516161516202121202122
Percentage of DefinedBenefitPlanExpectedReturnOnPlanAssets750.0500.0533.3750.0533.3800.0500.0533.31000.0700.0700.0666.7700.0733.3

us-gaap:RetirementPlanType

us-gaap:DefinedBenefitPlanInterestCost

us-gaap:OtherPostretirementBenefitPlansDefinedBenefit



Period End2019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-30
Value22222122222222
Percentage of DefinedBenefitPlanInterestCost100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:PensionPlansDefinedBenefit



Period End2019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-30
Value1213131211121211151514151516
Percentage of DefinedBenefitPlanInterestCost600.0650.0650.0600.0550.01200.0600.0550.0750.0750.0700.0750.0750.0800.0

us-gaap:RetirementPlanType

us-gaap:DefinedBenefitPlanNetPeriodicBenefitCost

us-gaap:OtherPostretirementBenefitPlansDefinedBenefit



Period End2019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-30
Value0000-10-1-1-3-3-3-3-4-3
Percentage of DefinedBenefitPlanNetPeriodicBenefitCost0.00.00.00.0100.00.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:PensionPlansDefinedBenefit



Period End2019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-30
Value1313121235151415851312151615
Percentage of DefinedBenefitPlanNetPeriodicBenefitCost0.00.00.00.0-3500.00.0-1400.0-1500.0-2833.3-433.3-400.0-500.0-400.0-500.0

us-gaap:RetirementPlanType

us-gaap:DefinedBenefitPlanRecognizedNetGainLossDueToSettlements1

us-gaap:PensionPlansDefinedBenefit



Period End2019-12-312019-09-302019-06-302018-12-312018-09-302018-06-302017-12-312017-09-302017-06-302016-12-312016-09-30
Value0-10-21-1-1-7100-10
Percentage of DefinedBenefitPlanRecognizedNetGainLossDueToSettlements10.0100.00.0100.0100.0100.0100.00.00.0100.00.0

us-gaap:RetirementPlanType

us-gaap:DefinedBenefitPlanServiceCost

us-gaap:OtherPostretirementBenefitPlansDefinedBenefit



Period End2019-12-312019-09-302018-12-312018-09-302018-06-302017-12-312017-09-302017-06-302016-12-312016-09-30
Value0.01000000.00.01000000.00.00.00.01000000.00.00.0
Percentage of DefinedBenefitPlanServiceCost0.0100.00.0100.00.00.00.0100.00.00.0

us-gaap:PensionPlansDefinedBenefit



Period End2019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-30
Value1211111113121114121312131413
Percentage of DefinedBenefitPlanServiceCost0.01100.00.00.00.01200.00.00.00.00.01200.00.00.00.0

us-gaap:DividendsCommonStockCash



Period End2019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312009-09-302009-03-31
Value460461461460412411282281248248248248150150481480480480442434426419291276241231204196496-154148118118-73-74-7373-64-64-64-64
Percentage of DividendsCommonStockCash100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:StatementEquityComponents

us-gaap:Parent



Period End2019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312009-09-302009-03-31
Value460461461460412411282281248248248248150150481480480480442434426419291276241231204196496-154148118118-73-74-7373-64-64-64-64
Percentage of DividendsCommonStockCash100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:RetainedEarnings



Period End2019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-06-302013-03-312012-12-312012-09-302012-06-302012-03-31
Value460461461460412411282281248248248248150150481480480480442434426419291276241231204196496-154
Percentage of DividendsCommonStockCash100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:EquityMethodInvestmentDividendsOrDistributions



Period End2019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value199131155172186191176140182198214190
Percentage of EquityMethodInvestmentDividendsOrDistributions100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:EquityMethodInvestmentOtherThanTemporaryImpairment



Period End2019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-30
Value0114-274320000000318001128984610000
Percentage of EquityMethodInvestmentOtherThanTemporaryImpairment0.0100.0100.0100.0100.00.00.00.00.00.00.00.0100.00.00.0100.0100.0100.00.00.00.00.0

us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FairValueByMeasurementFrequency, us-gaap:IncomeStatementLocation

us-gaap:FairValueInputsLevel3, us-gaap:FairValueMeasurementsNonrecurring, wmb:ImpairmentOfEquityMethodInvestments



Period End2019-12-312019-06-302017-03-312016-03-312015-12-31
Value0-2038
Percentage of EquityMethodInvestmentOtherThanTemporaryImpairment0.0100.00.02.70.9

us-gaap:EquityMethodInvestmentRealizedGainLossOnDisposal



Period End2019-12-312019-09-302019-06-302018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312014-06-302013-09-302013-06-302013-03-31
Value001220000000269270004-125-1
Percentage of EquityMethodInvestmentRealizedGainLossOnDisposal0.00.0100.00.00.00.00.00.00.00.0100.0100.00.00.00.0100.0100.0100.0100.0

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

us-gaap:ExtinguishmentOfDebtAmount

wmb:A8.75PercentSeniorUnsecuredNotesDue2020, us-gaap:SubsequentEvent, wmb:WilliamsCompaniesInc



Period End2020-01-15
Value14
Percentage of ExtinguishmentOfDebtAmount100.0

us-gaap:IncomeLossFromEquityMethodInvestments



Period End2019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value115938780117105928287115125107951041019799929351896637-48373818233027312545454046383940
Percentage of IncomeLossFromEquityMethodInvestments100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:IncreaseDecreaseInAccountsAndNotesReceivable



Period End2019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-03-312009-03-31
Value125-10-52-9711146117-23820683-172-29901188-298335-24-50-300170123-1-16-6272556-36-521712462-612823-3245
Percentage of IncreaseDecreaseInAccountsAndNotesReceivable100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:IncreaseDecreaseInAccountsPayable



Period End2019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-03-312009-03-31
Value3022-59-39-17-6127-1977118-33241-2835-2347-8927-75-6894-18-16-286559-106-68855663465817-13-60
Percentage of IncreaseDecreaseInAccountsPayable100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:IncreaseDecreaseInAccruedLiabilities



Period End2019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-03-312009-03-31
Value776212-14285-55159-1666916-44-133382151118-14542-999-106-77-186-76767-25-145557-98118-9795-656563-280-216
Percentage of IncreaseDecreaseInAccruedLiabilities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

dei:LegalEntity

us-gaap:IncreaseDecreaseInDeferredIncomeTaxes

wmb:NortheastJV



Period End2019-12-312019-06-30
Value1-141
Percentage of IncreaseDecreaseInDeferredIncomeTaxes100.0100.0

us-gaap:IncreaseDecreaseInOtherCurrentAssets



Period End2019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-31
Value-31-6106-61-1959410-635-18-7-1037-16-10-3954-9-51259-2219-11-111-4-3514-837-28-38
Percentage of IncreaseDecreaseInOtherCurrentAssets100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:InterestCostsCapitalizedAdjustment



Period End2019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-30
Value571010101613998978781519171622315229292724242611121087
Percentage of InterestCostsCapitalizedAdjustment100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:InterestCostsIncurred



Period End2019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-30
Value303303306306304286288282274275280287301304306306287280278273265262192169151151152147140140141132152155156152158
Percentage of InterestCostsIncurred100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:InvestmentIncomeNonoperating



Period End2019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-312012-09-302012-06-302012-03-31
Value-25-10712611452684442272-12818180189001118141039133369
Percentage of InvestmentIncomeNonoperating100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0100.0100.00.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:IncomeStatementLocation

us-gaap:OtherIncome



Period End2019-12-312019-09-302019-06-302018-12-312018-09-302018-06-30
Value272426
Percentage of InvestmentIncomeNonoperating-8.0-6.51.62.8100.08.8

us-gaap:MinorityInterestDecreaseFromDistributionsToNoncontrollingInterestHolders



Period End2019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-09-302009-03-31
Value381827413919621518720420421725822523724223623824223422833121314914711910510394289-995554-53-52-46-33-34-32-32-33
Percentage of MinorityInterestDecreaseFromDistributionsToNoncontrollingInterestHolders100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:StatementEquityComponents

us-gaap:NoncontrollingInterest



Period End2019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-09-302009-03-31
Value381827413919621518720420421725822523724223623824223422833121314914711910510394289-995554-53-52-46-33-34-32-32-33
Percentage of MinorityInterestDecreaseFromDistributionsToNoncontrollingInterestHolders100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

dei:LegalEntity

us-gaap:OtherAssetImpairmentCharges

wmb:ConstitutionPipelineCompanyLLC



Period End2019-12-31
Value354
Percentage of OtherAssetImpairmentCharges100.0

us-gaap:BalanceSheetLocation, dei:LegalEntity

wmb:NonControllingInterestShare, wmb:ConstitutionPipelineCompanyLLC



Period End2019-12-31
Value209
Percentage of OtherAssetImpairmentCharges59.0

us-gaap:OtherComprehensiveIncomeDefinedBenefitPlansNetUnamortizedGainLossArisingDuringPeriodNetOfTax



Period End2019-12-312019-09-302019-06-302018-12-312018-09-302018-06-302017-12-312017-09-302017-06-302016-12-312016-09-302016-06-302015-12-312015-09-302015-06-302014-12-312014-09-302013-09-302013-06-302012-12-312012-09-302012-06-302011-12-312011-09-302011-06-30
Value64-50-10044400-120-3800-1000120-26-1-3-148-40
Percentage of OtherComprehensiveIncomeDefinedBenefitPlansNetUnamortizedGainLossArisingDuringPeriodNetOfTax100.0100.00.0100.00.0100.0100.00.00.0100.00.0100.0100.00.00.0100.00.0100.00.0100.0100.0100.0100.0100.00.0

us-gaap:OtherComprehensiveIncomeDefinedBenefitPlansNetUnamortizedGainLossArisingDuringPeriodTax



Period End2019-12-312019-09-302019-06-302018-12-312018-09-302018-06-302017-12-312017-09-302017-06-302016-12-312016-09-302016-06-302015-12-312015-09-302014-12-312014-09-302013-09-302013-06-302012-12-312012-09-302012-06-302011-12-312011-09-302011-06-30
Value21-10-4011500-60-250-60070-17-11-87-20
Percentage of OtherComprehensiveIncomeDefinedBenefitPlansNetUnamortizedGainLossArisingDuringPeriodTax100.0100.00.0100.00.0100.0100.00.00.0100.00.0100.0100.00.0100.00.0100.00.0100.0100.0100.0100.0100.00.0

us-gaap:StatementEquityComponents

us-gaap:OtherComprehensiveIncomeLossBeforeReclassificationsNetOfTax

us-gaap:AccumulatedDefinedBenefitPlansAdjustment



Period End2019-12-312018-12-312018-09-302017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-31
Value64-10044000-120-308000-101000
Percentage of OtherComprehensiveIncomeLossBeforeReclassificationsNetOfTax100.0100.00.0100.00.00.00.0100.00.0100.00.0100.00.00.00.0100.00.00.00.0

us-gaap:AccumulatedNetGainLossFromDesignatedOrQualifyingCashFlowHedges



Period End2019-12-312018-12-312018-09-302017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-31
Value012-5-3-612110003000000
Percentage of OtherComprehensiveIncomeLossBeforeReclassificationsNetOfTax0.0-120.00.0-6.80.00.00.0-8.30.0-0.00.00.00.00.00.0-0.00.00.00.0

us-gaap:AccumulatedOtherComprehensiveIncome



Period End2019-12-312018-12-312018-09-302017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-30
Value642-542-612-11-42560-23-45
Percentage of OtherComprehensiveIncomeLossBeforeReclassificationsNetOfTax100.0-20.00.095.50.00.00.091.70.0-166.70.0-287.50.0

us-gaap:AccumulatedTranslationAdjustment



Period End2019-12-312018-12-312018-09-302017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-31
Value00010000-43860-31-485-60-24-3324-44
Percentage of OtherComprehensiveIncomeLossBeforeReclassificationsNetOfTax0.0-0.00.02.30.00.00.0-0.00.0-266.70.0-387.50.00.00.023.80.00.00.0

us-gaap:OtherComprehensiveIncomeLossCashFlowHedgeGainLossBeforeReclassificationAfterTax



Period End2019-12-312019-09-302018-12-312018-09-30
Value0012-5
Percentage of OtherComprehensiveIncomeLossCashFlowHedgeGainLossBeforeReclassificationAfterTax0.00.0100.0100.0

us-gaap:OtherComprehensiveIncomeLossCashFlowHedgeGainLossBeforeReclassificationTax



Period End2019-12-312019-09-302018-12-312018-09-30
Value005-3
Percentage of OtherComprehensiveIncomeLossCashFlowHedgeGainLossBeforeReclassificationTax0.00.0100.0100.0

us-gaap:OtherComprehensiveIncomeLossCashFlowHedgeGainLossReclassificationAfterTax



Period End2019-12-312019-09-302018-12-312018-09-30
Value002-7
Percentage of OtherComprehensiveIncomeLossCashFlowHedgeGainLossReclassificationAfterTax0.00.0100.0100.0

us-gaap:OtherComprehensiveIncomeLossCashFlowHedgeGainLossReclassificationTax



Period End2019-12-312019-09-302018-12-312018-09-30
Value002-2
Percentage of OtherComprehensiveIncomeLossCashFlowHedgeGainLossReclassificationTax0.00.0100.0100.0

us-gaap:OtherComprehensiveIncomeLossNetOfTax



Period End2019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-30
Value67-123216-3694-336-8761193-33-6516-89-133-4642-3956-20-12-36192420-9621
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:StatementEquityComponents

us-gaap:AccumulatedDefinedBenefitPlansAdjustment



Period End2019-12-312018-12-312018-09-302017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-06-302013-03-31
Value6711491443-841414766-95555109
Percentage of OtherComprehensiveIncomeLossNetOfTax100.052.466.796.8-133.3133.350.0100.05.39.14.3-42.4-10.837.5-6.771.4-10.911.9-12.8-50.0-75.0

us-gaap:AccumulatedNetGainLossFromDesignatedOrQualifyingCashFlowHedges



Period End2019-12-312018-12-312018-09-302017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-06-302013-03-31
Value01011-4-1201000000000000
Percentage of OtherComprehensiveIncomeLossNetOfTax0.047.616.71.1133.3-33.333.3-0.01.30.00.0-0.0-0.00.0-0.0-0.0-0.00.0-0.0-0.0-0.0

us-gaap:AccumulatedOtherComprehensiveIncome



Period End2019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-06-302013-03-312012-12-31
Value67-1232151593035-838964-17-4111-54-119-2829-39-20-12-32
Percentage of OtherComprehensiveIncomeLossNetOfTax100.0100.0100.0100.0100.083.3-33.383.398.9-0.0100.083.3100.050.081.868.851.563.168.860.789.560.969.0100.0100.0100.088.9

us-gaap:AccumulatedTranslationAdjustment



Period End2019-12-312018-12-312018-09-302017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-06-302013-03-31
Value0001000033860-31-485-60-24-3324-44-30-21
Percentage of OtherComprehensiveIncomeLossNetOfTax0.00.00.01.1-0.00.00.0-0.043.472.764.593.973.831.267.418.071.757.1112.8150.0175.0

us-gaap:NoncontrollingInterest



Period End2019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-06-302013-03-312012-12-31
Value000001-411-301038229-16-245-35-14-1813000-4
Percentage of OtherComprehensiveIncomeLossNetOfTax0.0-0.00.00.00.016.7133.316.71.1100.00.016.7-0.050.018.231.248.536.931.239.310.539.131.0-0.0-0.0-0.011.1

us-gaap:Parent



Period End2019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-06-302013-03-312012-12-31
Value67-1232151593035-838964-17-4111-54-119-2829-39-20-12-32
Percentage of OtherComprehensiveIncomeLossNetOfTax100.0100.0100.0100.0100.083.3-33.383.398.9-0.0100.083.3100.050.081.868.851.563.168.860.789.560.969.0100.0100.0100.088.9

us-gaap:OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetGainLossNetOfTax



Period End2019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-312012-09-30
Value-3-4-2-3-21-4-5-5-48-4-5-4-5-5-5-5-7-7-7-7-8-6-6-6-9-10-10-10
Percentage of OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetGainLossNetOfTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetGainLossTax



Period End2019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-312012-09-30
Value-10-2-1-6-3-1-1-30-2-2-3-3-3-3-3-5-5-4-4-4-4-4-3-7-5-6-6
Percentage of OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetGainLossTax100.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OtherOperatingActivitiesCashFlowStatement



Period End2019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-31
Value-15-118-22-21109-86-169178-90-158-101351-112-4982-165-46-54183081-305996-38-58121217-3231-3133-39
Percentage of OtherOperatingActivitiesCashFlowStatement100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OtherOperatingIncomeExpenseNet



Period End2019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-30
Value2211-9-44-436-1-29-46-24-6-5-12-92-23-23-187-5-40-1792-3-27-1729-487-14-9-810-36-2412
Percentage of OtherOperatingIncomeExpenseNet100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0100.0100.0100.0100.0100.0

us-gaap:PaymentsForProceedsFromOtherInvestingActivities



Period End2019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-03-312009-03-31
Value44816123-116219253-55-59-122-63-74-56-97-467136-82-159-78-92-115-2962-5-37-54-12-8-32-381119-71-7-9
Percentage of PaymentsForProceedsFromOtherInvestingActivities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:PaymentsForProceedsFromProductiveAssets



Period End2019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-31
Value81711455-411413122-12-7-24
Percentage of PaymentsForProceedsFromProductiveAssets100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:PaymentsOfDebtIssuanceCosts



Period End2019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312011-12-312011-09-302010-12-312010-09-302010-03-312009-12-312009-03-31
Value0000080183113010082422703261126550-6500
Percentage of PaymentsOfDebtIssuanceCosts0.00.00.00.00.0100.00.0100.0100.0100.0100.00.0100.00.00.0100.0100.0100.0100.0100.00.0100.0100.0100.0100.0100.0100.00.0100.00.00.0

us-gaap:PaymentsOfDividendsCommonStock



Period End2019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-03-312009-03-31
Value460461461460412411282281248248248248150150481480480480442434426419291276241231204196188154148118118737473-64-64
Percentage of PaymentsOfDividendsCommonStock100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:PaymentsOfDividendsMinorityInterest



Period End2019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-03-312009-03-31
Value3818274139196191165186189205242225237242236238242234228331213149147119105103949161555453524633-32-33
Percentage of PaymentsOfDividendsMinorityInterest100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:PaymentsToAcquireBusinessesNetOfCashAcquired



Period End2019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312016-12-312016-09-302015-12-312015-09-302014-12-312013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-31
Value0107270000000000000172432504100
Percentage of PaymentsToAcquireBusinessesNetOfCashAcquired0.0100.00.0100.00.00.00.00.00.00.00.00.00.00.00.00.00.0100.0100.00.0100.00.00.0

us-gaap:PaymentsToAcquireEquityMethodInvestments



Period End2019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-06-302013-03-312012-06-302012-03-31
Value9211914399329712702129242752451059636646400831379918228959313648
Percentage of PaymentsToAcquireEquityMethodInvestments100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:PreferredStockDividendsIncomeStatementImpact



Period End2019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-30
Value1000000.01000000.00.01000000.01000000.00.00.00.00.00.0
Percentage of PreferredStockDividendsIncomeStatementImpact100.0100.00.0100.0100.00.00.00.00.00.0

us-gaap:ProceedsFromContributionInAidOfConstruction



Period End2019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value27781016561491901735963131
Percentage of ProceedsFromContributionInAidOfConstruction100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ProceedsFromDivestitureOfInterestInConsolidatedSubsidiaries



Period End2019-12-312019-09-302018-12-312018-09-30
Value4000
Percentage of ProceedsFromDivestitureOfInterestInConsolidatedSubsidiaries100.00.00.00.0

us-gaap:ProceedsFromIssuanceOfCommonStock



Period End2019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-02-012017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-232014-06-302014-06-302014-03-312013-06-302013-03-312012-12-312012-12-312012-09-302012-06-302012-04-302012-03-312011-12-312011-09-302011-06-302011-03-31
Value04060411015321002122120606111026337833783394142716001615790288726155326
Percentage of ProceedsFromIssuanceOfCommonStock0.0100.00.0100.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0100.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ProceedsFromMinorityShareholders



Period End2019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-06-302013-03-31
Value402842283256425616262831268013859632702
Percentage of ProceedsFromMinorityShareholders100.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ProceedsFromPaymentsForOtherFinancingActivities



Period End2019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-03-312009-03-31
Value-2-20-90-3-3-40-5-58-1-281-1-11-4310-133334-244-11325-5530-1152-20211014-9-6
Percentage of ProceedsFromPaymentsForOtherFinancingActivities100.0100.00.0100.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ProceedsFromRepaymentsOfCommercialPaper



Period End2019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-06-302013-03-31
Value00-10181014-82382100000-9390-19561-365-1033-2151741-799533265-1-2257100
Percentage of ProceedsFromRepaymentsOfCommercialPaper0.00.0100.0100.0100.0100.00.00.00.00.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0

us-gaap:ProceedsFromSaleOfEquityMethodInvestments



Period End2019-12-312019-09-302018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312011-05-31
Value00000000020034000297
Percentage of ProceedsFromSaleOfEquityMethodInvestments0.00.00.00.00.00.00.00.00.0100.0100.00.00.00.0100.0

us-gaap:PropertyPlantAndEquipmentAdditions



Period End2019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value3167305594185396189309348366665915694444484955257137578167381014111394984087373297178562837110393000-604-4826832970-488-410
Percentage of PropertyPlantAndEquipmentAdditions100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:IncomeStatementLocation, us-gaap:StatementBusinessSegments

us-gaap:PublicUtilitiesAllowanceForFundsUsedDuringConstructionCapitalizedCostOfEquity

us-gaap:OtherNonoperatingIncomeExpense, wmb:AtlanticGulf



Period End2019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-30
Value895793326201617
Percentage of PublicUtilitiesAllowanceForFundsUsedDuringConstructionCapitalizedCostOfEquity100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

wmb:DeferredTaxesOnEquityFundsUsedDuringConstruction, wmb:Other



Period End2019-12-312019-09-302018-12-312018-09-30
Value23719
Percentage of PublicUtilitiesAllowanceForFundsUsedDuringConstructionCapitalizedCostOfEquity25.033.377.857.6

us-gaap:StatementEquityComponents

us-gaap:ReclassificationFromAccumulatedOtherComprehensiveIncomeCurrentPeriodNetOfTax

us-gaap:AccumulatedDefinedBenefitPlansAdjustment



Period End2019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-31
Value-3-4-2-3-21-4-5-5-47-4-4-3-4-4-4-4-6-7-6-6-6-5-5-5
Percentage of ReclassificationFromAccumulatedOtherComprehensiveIncomeCurrentPeriodNetOfTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:AccumulatedNetGainLossFromDesignatedOrQualifyingCashFlowHedges



Period End2019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-31
Value00002-6-10-4-220100003000000
Percentage of ReclassificationFromAccumulatedOtherComprehensiveIncomeCurrentPeriodNetOfTax-0.0-0.0-0.0-0.0-9.5150.020.0-0.08.550.0-50.0-0.0-25.0-0.0-0.0-0.0-0.0-42.9-0.0-0.0-0.0-0.0-0.0-0.0

us-gaap:AccumulatedTranslationAdjustment



Period End2019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-31
Value0000000000000-760000000000
Percentage of ReclassificationFromAccumulatedOtherComprehensiveIncomeCurrentPeriodNetOfTax-0.0-0.0-0.0-0.0-0.0-0.0-0.0-0.0-0.0-0.0-0.0-0.0-0.01900.0-0.0-0.0-0.0-0.0-0.0-0.0-0.0-0.0-0.0-0.0

us-gaap:RevenueNotFromContractWithCustomer



Period End2019-12-312019-09-302018-12-312018-09-30
Value7142323
Percentage of RevenueNotFromContractWithCustomer100.0100.0100.0100.0

us-gaap:StockIssuedDuringPeriodValueShareBasedCompensation



Period End2019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-06-302013-03-312012-12-312012-09-30
Value1317171112161419141923181618914-381832181319332315112017
Percentage of StockIssuedDuringPeriodValueShareBasedCompensation100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:StatementEquityComponents

us-gaap:AdditionalPaidInCapital



Period End2019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-06-302013-03-312012-12-312012-09-30
Value1316171012161418141923171618913-381831171318332114101917
Percentage of StockIssuedDuringPeriodValueShareBasedCompensation100.094.1100.090.9100.0100.0100.094.7100.0100.0100.094.4100.0100.0100.092.9100.0100.096.994.4100.094.7100.091.393.390.995.0100.0

us-gaap:CommonStock



Period End2019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-06-302013-03-312012-12-312012-09-30
Value0101000100010001001101021110
Percentage of StockIssuedDuringPeriodValueShareBasedCompensation0.05.90.09.10.00.00.05.30.00.00.05.60.00.00.07.1-0.00.03.15.60.05.30.08.76.79.15.00.0

us-gaap:Parent



Period End2019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-06-302013-03-312012-12-312012-09-30
Value1317171112161419141923181618914-381832181319332315112017
Percentage of StockIssuedDuringPeriodValueShareBasedCompensation100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:StockholdersEquityOther



Period End2019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302010-09-302010-06-302010-03-312009-03-31
Value2213022123-1-204-2-8-6-5-5-611-24-2-1233-110-3101
Percentage of StockholdersEquityOther100.0100.0100.0100.00.0100.0100.0100.0100.0100.0100.0100.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0100.0100.00.0100.0

us-gaap:StatementEquityComponents

us-gaap:AdditionalPaidInCapital



Period End2019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-06-302013-03-312012-12-312012-09-302012-06-302012-03-31
Value01-10-1110-2-3-1-10-2-2-8-14-11020-2300-213-2
Percentage of StockholdersEquityOther0.050.0-100.00.00.050.050.00.0-100.0-100.0100.050.00.0-50.0100.0100.0233.320.0-20.0-0.0200.00.0100.075.0-0.0-0.0-100.033.3100.0200.0

us-gaap:CommonStock



Period End2019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-06-302013-03-312012-12-312012-09-302012-06-302012-03-31
Value0.00.00.00.00.0-1000000.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.01000000.0-1000000.00.00.00.00.01000000.0-1000000.00.0
Percentage of StockholdersEquityOther0.00.00.00.00.0-50.00.00.00.00.0-0.0-0.00.00.0-0.0-0.0-0.0-0.0-0.0-0.00.0100.050.00.0-0.0-0.00.033.3-33.3-0.0

us-gaap:NoncontrollingInterest



Period End2019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302010-09-302010-03-312009-03-31
Value000001003300-160-37-5-7-8-1000-1-1-41110-1001
Percentage of StockholdersEquityOther0.00.00.00.00.050.00.00.0150.0100.0-0.0-0.00.0150.0-0.037.5-116.7100.0140.0133.3-100.00.0-0.00.050.0100.0-200.033.333.3-100.00.00.0-0.00.0100.0

us-gaap:Parent



Period End2019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302010-09-302010-06-302010-03-312009-03-31
Value22130121-10-1-21-2-2-5-1302221-24-10622-211-3100
Percentage of StockholdersEquityOther100.0100.0100.0100.00.050.0100.0100.0-50.00.0100.0100.00.0-50.0100.062.5216.7-0.0-40.0-33.3200.0100.0100.0100.050.0-0.0300.066.766.7200.0100.00.0100.0100.00.00.0

us-gaap:RetainedEarnings



Period End2019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-06-302013-03-312012-12-312012-09-302012-06-302012-03-31
Value21231111130-1100311120011108000
Percentage of StockholdersEquityOther100.050.0200.0100.00.050.050.0100.050.0100.0-0.050.00.00.0-0.0-37.5-16.7-20.0-20.0-33.30.00.0-50.025.0-50.0-0.0400.00.00.0-0.0

us-gaap:StockholdersEquityPeriodIncreaseDecrease



Period End2019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-31
Value-495-2221356-272-9621512-456-2721293-299-2281363-178-198-1202-601-2035-911-410-591-509
Percentage of StockholdersEquityPeriodIncreaseDecrease100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:StatementEquityComponents

us-gaap:AccumulatedOtherComprehensiveIncome



Period End2019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-31
Value67-1232121-5693035-838964-17-4111-54-119
Percentage of StockholdersEquityPeriodIncreaseDecrease-13.50.50.1-1.1-2.20.1-0.220.67.2-0.0-1.30.44.5-19.2-0.7-10.60.84.5-2.79.123.4

us-gaap:AdditionalPaidInCapital



Period End2019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-31
Value1314-4071013612819251621263558-43811626-262133-1460
Percentage of StockholdersEquityPeriodIncreaseDecrease-2.6-6.3-30.0-3.7-1.4405.3-4.2-9.21.2-7.0-11.4261.024.2-40.9-1.3-4.31.3-2.3-8.024.7-0.0

us-gaap:CommonStock



Period End2019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-31
Value010103830100076000100110
Percentage of StockholdersEquityPeriodIncreaseDecrease-0.0-0.50.0-0.4-0.025.3-0.0-0.40.0-0.0-0.05.6-0.0-0.0-0.0-0.2-0.0-0.0-0.2-0.2-0.0

us-gaap:NoncontrollingInterest



Period End2019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-31
Value-23751914-18-12-4753-328-89-254-102-90-243839-228-341-144-796-370-126-26-157
Percentage of StockholdersEquityPeriodIncreaseDecrease47.9-2.3141.26.61.2-314.471.932.7-19.634.139.5-178.9-21.9115.228.424.039.140.630.74.430.8

us-gaap:Parent



Period End2019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-31
Value-258-227-558-254-9506265-128-1831547-197-1383801-21730-861-457-1239-541-284-565-352
Percentage of StockholdersEquityPeriodIncreaseDecrease52.1102.3-41.293.498.8414.428.167.3119.665.960.5278.9121.9-15.271.676.060.959.469.395.669.2

us-gaap:PreferredStock



Period End2019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value000003500
Percentage of StockholdersEquityPeriodIncreaseDecrease-0.0-0.00.0-0.0-0.02.3-0.0-0.0

us-gaap:RetainedEarnings



Period End2019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-31
Value-338-241-153-268-984-283-148-1531438-218-167162-166-89-886-548-1196-521-329-366-233
Percentage of StockholdersEquityPeriodIncreaseDecrease68.3108.6-11.398.5102.3-18.732.556.2111.272.973.211.993.344.973.791.258.857.280.261.945.8

us-gaap:RealEstateAndAccumulatedDepreciationDescriptionOfProperty, us-gaap:StatementBusinessSegments

us-gaap:SubsidiaryOfLimitedLiabilityCompanyOrLimitedPartnershipOwnershipInterest

wmb:ConwayFractionator, wmb:West



Period End2019-12-312019-09-302019-06-302019-03-312018-12-31
Value0.00.00.00.50.0
Percentage of SubsidiaryOfLimitedLiabilityCompanyOrLimitedPartnershipOwnershipInterest0.00.00.0100.00.0

us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FairValueByMeasurementFrequency, us-gaap:IncomeStatementLocation, us-gaap:StatementBusinessSegments

us-gaap:TangibleAssetImpairmentCharges

us-gaap:FairValueInputsLevel2, us-gaap:FairValueMeasurementsNonrecurring, wmb:ImpairmentOfCertainAssets, wmb:West



Period End2019-12-31
Value20
Percentage of TangibleAssetImpairmentCharges100.0

us-gaap:FairValueInputsLevel3, us-gaap:FairValueMeasurementsNonrecurring, wmb:ImpairmentOfCertainAssets, wmb:AtlanticGulf



Period End2019-12-31
Value354
Percentage of TangibleAssetImpairmentCharges1770.0

us-gaap:IncomeStatementLocation, us-gaap:StatementBusinessSegments

wmb:AccrualOfRegulatoryLiability

us-gaap:OtherOperatingIncomeExpense, wmb:AtlanticGulf



Period End2019-12-312019-09-302019-06-302018-12-312018-09-302018-06-302017-12-312017-09-30
Value-6-9065665
Percentage of AccrualOfRegulatoryLiability100.0100.00.0100.0100.0100.0100.0100.0

wmb:AssetRetirementObligationAccretionExpenseForNonregulatedOperations



Period End2019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-31
Value8889781081079779877696
Percentage of AssetRetirementObligationAccretionExpenseForNonregulatedOperations100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

wmb:ContractLiabilityNoncashInterestExpenseSignificantFinancingObligation



Period End2019-12-312019-09-302019-06-302018-12-312018-09-302018-06-30
Value333544
Percentage of ContractLiabilityNoncashInterestExpenseSignificantFinancingObligation100.0100.0100.0100.0100.0100.0

wmb:ContributionsFromNoncontrollingInterests



Period End2019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value4028422832564
Percentage of ContributionsFromNoncontrollingInterests100.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:StatementEquityComponents

us-gaap:NoncontrollingInterest



Period End2019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value4028422832564
Percentage of ContributionsFromNoncontrollingInterests100.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

wmb:IncreaseDecreaseInAccountsPayableAndAccruedLiabilitiesRelatedToCapitalExpendituresIncurredButNotYetPaid



Period End2019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-31
Value-88-5662-4-58-151-3-23137224658-30-60-6112-29-14-6-94
Percentage of IncreaseDecreaseInAccountsPayableAndAccruedLiabilitiesRelatedToCapitalExpendituresIncurredButNotYetPaid100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:RetirementPlanType

wmb:ReclassificationOfEmployeeBenefitCostCreditToRegulatoryAssetLiability

us-gaap:OtherPostretirementBenefitPlansDefinedBenefit



Period End2019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-30
Value0.00.01000000.00.01000000.00.00.01000000.00.01000000.01000000.01000000.01000000.01000000.0
Percentage of ReclassificationOfEmployeeBenefitCostCreditToRegulatoryAssetLiability0.00.0100.00.0100.00.00.0100.00.0100.0100.0100.0100.0100.0

us-gaap:IncomeStatementLocation, us-gaap:StatementBusinessSegments

wmb:RegulatoryBenefitResultingFromTaxRateChange

us-gaap:OtherOperatingIncomeExpense, us-gaap:CorporateAndOther



Period End2019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value000120-3700
Percentage of RegulatoryBenefitResultingFromTaxRateChange0.00.00.0100.00.0100.00.00.0

us-gaap:IncomeStatementLocation, us-gaap:StatementBusinessSegments

wmb:RegulatoryChargeResultingFromTaxRateChange

us-gaap:OtherOperatingIncomeExpense, wmb:AtlanticGulf



Period End2019-12-312019-09-302018-12-312018-09-30
Value-7-1200
Percentage of RegulatoryChargeResultingFromTaxRateChange100.0100.00.00.0

us-gaap:IncomeStatementLocation, us-gaap:StatementBusinessSegments

wmb:RegulatoryChargesInOperatingExpenseResultingFromTaxReform

us-gaap:OtherOperatingIncomeExpense, wmb:West



Period End2019-12-312019-09-302019-06-302018-12-312018-09-302018-06-302017-12-312017-09-30
Value240066000
Percentage of RegulatoryChargesInOperatingExpenseResultingFromTaxReform100.00.00.0100.0100.00.00.00.0

us-gaap:RelatedPartyTransaction

us-gaap:AccountsPayableRelatedPartiesCurrent

us-gaap:EquityMethodInvestee



Period End2019-12-312018-12-312017-12-312016-12-312015-12-31
Value3618201912
Percentage of AccountsPayableRelatedPartiesCurrent100.0100.0100.0100.0100.0

us-gaap:AccrualForEnvironmentalLossContingencies



Period End2019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-30
Value31333434353638393840394038373738404141434443454647454849464445464747
Percentage of AccrualForEnvironmentalLossContingencies100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:LossContingenciesByNatureOfContingency

wmb:FormerOperations



Period End2019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-30
Value2020222222222222232423232223242425262325252626262727282929262828292830
Percentage of AccrualForEnvironmentalLossContingencies64.560.664.764.762.961.157.956.460.560.059.057.557.962.264.963.262.563.456.158.156.860.557.856.557.460.058.359.263.059.162.260.961.759.60.0

wmb:GasPipeline



Period End2019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-31
Value4555677778899767881010
Percentage of AccrualForEnvironmentalLossContingencies12.915.214.714.717.119.418.417.918.420.020.522.523.718.916.218.420.019.524.423.3

wmb:NaturalGasUnderGroundStorageFacilities



Period End2019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-30
Value7877779108888777777888687779117888888
Percentage of AccrualForEnvironmentalLossContingencies22.624.220.620.620.019.423.725.621.120.020.520.018.418.918.918.417.517.119.518.618.214.017.815.214.915.618.822.415.218.217.817.417.017.00.0

us-gaap:AccruedLiabilitiesCurrent



Period End2019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-03-312009-12-312008-12-31
Value1276118411999741102111710638871167107912751322144810599039391078122592480190089565570479770069162462860959952963180191587210029297609481139
Percentage of AccruedLiabilitiesCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:AdditionalPaidInCapitalCommonStock



Period End2019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-03-312009-12-312008-12-31
Value2432324310242962470324693246801855218533185081849218471184451488714930148491483314807148331481214779149251492514890115451159911582112741125811134944993058269841783688351830282697991734681358074
Percentage of AdditionalPaidInCapitalCommonStock100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:AllowanceForDoubtfulAccountsReceivableCurrent



Period End2019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312014-12-312012-12-312012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-03-312009-12-312008-12-31
Value666999101096666556300111717181515192229
Percentage of AllowanceForDoubtfulAccountsReceivableCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:AssetRetirementObligation



Period End2019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-312010-12-312009-12-312008-12-31
Value11651032998862915831561579573789728644
Percentage of AssetRetirementObligation100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:AssetRetirementObligationCurrent



Period End2019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-312010-12-31
Value48645361574064686635
Percentage of AssetRetirementObligationCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FairValueByMeasurementFrequency

us-gaap:AssetRetirementObligationLegallyRestrictedAssetsFairValue

us-gaap:FairValueInputsLevel1, us-gaap:FairValueMeasurementsRecurring



Period End2019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312013-12-312012-12-31
Value2011871831731501571511451351271191129693878267636360483318
Percentage of AssetRetirementObligationLegallyRestrictedAssetsFairValue100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:FairValueByMeasurementBasis, us-gaap:FairValueByMeasurementFrequency

us-gaap:CarryingReportedAmountFairValueDisclosure, us-gaap:FairValueMeasurementsRecurring



Period End2019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312013-12-312012-12-31
Value2011871831731501571511451351271191129693878267636360483318
Percentage of AssetRetirementObligationLegallyRestrictedAssetsFairValue100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:EstimateOfFairValueFairValueDisclosure, us-gaap:FairValueMeasurementsRecurring



Period End2019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312013-12-312012-12-31
Value2011871831731501571511451351271191129693878267636360483318
Percentage of AssetRetirementObligationLegallyRestrictedAssetsFairValue100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:AssetRetirementObligationsNoncurrent



Period End2019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-312010-12-31
Value1117968946801858791497511507464
Percentage of AssetRetirementObligationsNoncurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ContractWithCustomerAssetNet



Period End2019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value831172245639244
Percentage of ContractWithCustomerAssetNet100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ContractWithCustomerLiability



Period End2019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value121512691331133513971485153515741596
Percentage of ContractWithCustomerLiability100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:CustomerRefundLiabilityCurrent



Period End2019-12-312018-12-312014-12-312013-12-312012-12-31
Value18901980
Percentage of CustomerRefundLiabilityCurrent100.00.0100.0100.00.0

us-gaap:DebtAndCapitalLeaseObligations



Period End2019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-312010-12-31
Value222882241420935234092398820892113541073687229108
Percentage of DebtAndCapitalLeaseObligations100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DebtInstrument, dei:LegalEntity

us-gaap:DebtInstrumentCarryingAmount

wmb:Various7.625PercentTo10.25PercentSeniorUnsecuredNotesAndDebenturesDue2019To2027, wmb:WilliamsCompaniesInc



Period End2019-12-312018-12-31
Value2455
Percentage of DebtInstrumentCarryingAmount100.0100.0

us-gaap:DebtInstrumentUnamortizedDiscountPremiumNet



Period End2019-12-312018-12-312018-03-282017-12-312017-09-302017-07-032017-02-232016-12-312015-12-312014-12-312013-12-312012-12-312011-12-312010-12-31
Value586272427330-88110187-37-33-32-38
Percentage of DebtInstrumentUnamortizedDiscountPremiumNet100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:IncomeStatementLocation, us-gaap:StatementBusinessSegments

us-gaap:OtherNonoperatingIncomeExpense, wmb:Other



Period End2019-12-312018-12-312017-12-31
Value0-727
Percentage of DebtInstrumentUnamortizedDiscountPremiumNet0.0-11.3112.5

us-gaap:DeferredIncomeTaxLiabilities



Period End2019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-31
Value341426423584532952915486384032522671
Percentage of DeferredIncomeTaxLiabilities100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DeferredRevenueCurrent



Period End2019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-31
Value158244361338948247
Percentage of DeferredRevenueCurrent100.0100.0100.0100.0100.0100.0100.0

us-gaap:DeferredTaxAndOtherLiabilitiesNoncurrent



Period End2019-12-312019-09-302018-12-31
Value178216511524
Percentage of DeferredTaxAndOtherLiabilitiesNoncurrent100.0100.0100.0

us-gaap:DeferredTaxAssetsGross



Period End2019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-312010-12-312009-12-31
Value19511438661142513051047519672711837966
Percentage of DeferredTaxAssetsGross100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DeferredTaxAssetsOperatingLossCarryforwardsDomestic



Period End2019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-31
Value54414706514851340
Percentage of DeferredTaxAssetsOperatingLossCarryforwardsDomestic100.0100.00.0100.0100.0100.00.0

us-gaap:DeferredTaxAssetsOperatingLossCarryforwardsStateAndLocal



Period End2019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-312010-12-312009-12-31
Value362319283313296250194195170278289
Percentage of DeferredTaxAssetsOperatingLossCarryforwardsStateAndLocal100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DeferredTaxAssetsOther



Period End2019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-312010-12-312009-12-31
Value14794303742979190987058
Percentage of DeferredTaxAssetsOther100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:IncomeTaxAuthority, us-gaap:TaxCreditCarryforward

us-gaap:DeferredTaxAssetsTaxCreditCarryforwards

us-gaap:InternalRevenueServiceIRS, wmb:Expiration2020To2023MemberDomain



Period End2019-12-31
Value5
Percentage of DeferredTaxAssetsTaxCreditCarryforwards100.0

us-gaap:InternalRevenueServiceIRS, wmb:ExpirationNone



Period End2019-12-312018-12-31
Value539142
Percentage of DeferredTaxAssetsTaxCreditCarryforwards10780.00.0

us-gaap:DeferredTaxAssetsTaxCreditCarryforwardsAlternativeMinimumTax



Period End2019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-312010-12-312009-12-31
Value29711551391391371087411912062
Percentage of DeferredTaxAssetsTaxCreditCarryforwardsAlternativeMinimumTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DeferredTaxAssetsTaxCreditCarryforwardsForeign



Period End2019-12-312018-12-312017-12-312016-12-312015-12-312014-12-31
Value140140140140193251
Percentage of DeferredTaxAssetsTaxCreditCarryforwardsForeign100.0100.0100.0100.0100.0100.0

us-gaap:DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsAccruedLiabilities



Period End2019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-312010-12-31
Value72966753145150178126313324257
Percentage of DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsAccruedLiabilities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DeferredTaxLiabilitiesInvestmentInNoncontrolledAffiliates



Period End2019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-312010-12-31
Value141129535655300527254723663314620631978
Percentage of DeferredTaxLiabilitiesInvestmentInNoncontrolledAffiliates100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DeferredTaxLiabilitiesOther



Period End2019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-312010-12-312009-12-31
Value82301929151003446100108
Percentage of DeferredTaxLiabilitiesOther100.0100.0100.0100.0100.0100.00.0100.0100.0100.0100.0

us-gaap:DeferredTaxLiabilitiesPropertyPlantAndEquipment



Period End2019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-312010-12-312009-12-31
Value192123170044102726517843658
Percentage of DeferredTaxLiabilitiesPropertyPlantAndEquipment100.0100.00.00.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:RetirementPlanType

us-gaap:DefinedBenefitPlanAccumulatedBenefitObligation

us-gaap:PensionPlansDefinedBenefit



Period End2019-12-312018-12-312017-12-312016-12-31
Value1221117112941440
Percentage of DefinedBenefitPlanAccumulatedBenefitObligation100.0100.0100.0100.0

us-gaap:RetirementPlanType

us-gaap:DefinedBenefitPlanAccumulatedOtherComprehensiveIncomeNetGainsLossesBeforeTax

us-gaap:OtherPostretirementBenefitPlansDefinedBenefit



Period End2019-12-312018-12-312017-12-312016-12-31
Value-21-12-21-18
Percentage of DefinedBenefitPlanAccumulatedOtherComprehensiveIncomeNetGainsLossesBeforeTax100.0100.0100.0100.0

us-gaap:PensionPlansDefinedBenefit



Period End2019-12-312018-12-312017-12-312016-12-31
Value-243-347-375-535
Percentage of DefinedBenefitPlanAccumulatedOtherComprehensiveIncomeNetGainsLossesBeforeTax1157.12891.71785.72972.2

us-gaap:RetirementPlanType

us-gaap:DefinedBenefitPlanAssetsForPlanBenefitsNoncurrent

us-gaap:OtherPostretirementBenefitPlansDefinedBenefit



Period End2019-12-312018-12-312017-12-312016-12-31
Value38342718
Percentage of DefinedBenefitPlanAssetsForPlanBenefitsNoncurrent100.0100.0100.0100.0

us-gaap:PensionPlansDefinedBenefit



Period End2019-12-312018-12-31
Value920
Percentage of DefinedBenefitPlanAssetsForPlanBenefitsNoncurrent242.10.0

us-gaap:RetirementPlanType

us-gaap:DefinedBenefitPlanAssumptionsUsedCalculatingBenefitObligationDiscountRate

us-gaap:OtherPostretirementBenefitPlansDefinedBenefit



Period End2019-12-312018-12-312017-12-312016-12-31
Value0.03270.04390.03710.0427
Percentage of DefinedBenefitPlanAssumptionsUsedCalculatingBenefitObligationDiscountRate100.0100.0100.0100.0

us-gaap:PensionPlansDefinedBenefit



Period End2019-12-312018-12-312017-12-312016-12-31
Value0.03190.04340.03660.0417
Percentage of DefinedBenefitPlanAssumptionsUsedCalculatingBenefitObligationDiscountRate97.698.998.797.7

us-gaap:RetirementPlanType

us-gaap:DefinedBenefitPlanAssumptionsUsedCalculatingBenefitObligationRateOfCompensationIncrease

us-gaap:PensionPlansDefinedBenefit



Period End2019-12-312018-12-312017-12-312016-12-31
Value0.03680.04830.04930.0487
Percentage of DefinedBenefitPlanAssumptionsUsedCalculatingBenefitObligationRateOfCompensationIncrease100.0100.0100.0100.0

us-gaap:RetirementPlanType

us-gaap:DefinedBenefitPlanAssumptionsUsedCalculatingBenefitObligationWeightedAverageInterestCreditingRate

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Period End2019-12-312018-12-31
Value0.0350.0425
Percentage of DefinedBenefitPlanAssumptionsUsedCalculatingBenefitObligationWeightedAverageInterestCreditingRate100.0100.0

us-gaap:RetirementPlanType

us-gaap:DefinedBenefitPlanBenefitObligation

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Period End2019-12-312018-12-312017-12-312016-12-312015-12-31
Value215186206197202
Percentage of DefinedBenefitPlanBenefitObligation100.0100.0100.0100.0100.0

us-gaap:PensionPlansDefinedBenefit



Period End2019-12-312018-12-312017-12-312016-12-312015-12-31
Value12371187131914661464
Percentage of DefinedBenefitPlanBenefitObligation575.3638.2640.3744.2724.8

us-gaap:RetirementPlanType

us-gaap:DefinedBenefitPlanExpectedFutureBenefitPaymentsFiveFiscalYearsThereafter

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Period End2019-12-312018-12-312017-12-31
Value625960
Percentage of DefinedBenefitPlanExpectedFutureBenefitPaymentsFiveFiscalYearsThereafter100.0100.0100.0

us-gaap:PensionPlansDefinedBenefit



Period End2019-12-312018-12-312017-12-31
Value433467486
Percentage of DefinedBenefitPlanExpectedFutureBenefitPaymentsFiveFiscalYearsThereafter698.4791.5810.0

us-gaap:RetirementPlanType

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Period End2019-12-312018-12-312017-12-31
Value141413
Percentage of DefinedBenefitPlanExpectedFutureBenefitPaymentsNextTwelveMonths100.0100.0100.0

us-gaap:PensionPlansDefinedBenefit



Period End2019-12-312018-12-312017-12-31
Value1008591
Percentage of DefinedBenefitPlanExpectedFutureBenefitPaymentsNextTwelveMonths714.3607.1700.0

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us-gaap:DefinedBenefitPlanExpectedFutureBenefitPaymentsYearFive

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Period End2019-12-312018-12-312017-12-31
Value141413
Percentage of DefinedBenefitPlanExpectedFutureBenefitPaymentsYearFive100.0100.0100.0

us-gaap:PensionPlansDefinedBenefit



Period End2019-12-312018-12-312017-12-31
Value908996
Percentage of DefinedBenefitPlanExpectedFutureBenefitPaymentsYearFive642.9635.7738.5

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us-gaap:DefinedBenefitPlanExpectedFutureBenefitPaymentsYearFour

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Period End2019-12-312018-12-312017-12-31
Value141413
Percentage of DefinedBenefitPlanExpectedFutureBenefitPaymentsYearFour100.0100.0100.0

us-gaap:PensionPlansDefinedBenefit



Period End2019-12-312018-12-312017-12-31
Value939096
Percentage of DefinedBenefitPlanExpectedFutureBenefitPaymentsYearFour664.3642.9738.5

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Period End2019-12-312018-12-312017-12-31
Value141314
Percentage of DefinedBenefitPlanExpectedFutureBenefitPaymentsYearThree100.0100.0100.0

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Period End2019-12-312018-12-312017-12-31
Value979092
Percentage of DefinedBenefitPlanExpectedFutureBenefitPaymentsYearThree692.9692.3657.1

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us-gaap:DefinedBenefitPlanExpectedFutureBenefitPaymentsYearTwo

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Period End2019-12-312018-12-312017-12-31
Value141413
Percentage of DefinedBenefitPlanExpectedFutureBenefitPaymentsYearTwo100.0100.0100.0

us-gaap:PensionPlansDefinedBenefit



Period End2019-12-312018-12-312017-12-31
Value998790
Percentage of DefinedBenefitPlanExpectedFutureBenefitPaymentsYearTwo707.1621.4692.3

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Period End2019-12-312018-12-312017-12-31
Value335
Percentage of DefinedBenefitPlanExpectedFutureEmployerContributionsNextFiscalYear100.0100.0100.0

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Period End2019-12-312018-12-312017-12-31
Value136385
Percentage of DefinedBenefitPlanExpectedFutureEmployerContributionsNextFiscalYear433.32100.01700.0

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Period End2019-12-312018-12-312017-12-31
Value106080
Percentage of DefinedBenefitPlanExpectedFutureEmployerContributionsNextFiscalYear333.32000.01600.0

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Period End2019-12-312018-12-312017-12-31
Value165
Percentage of DefinedBenefitPlanFairValueOfPlanAssets100.0100.0100.0

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Period End2019-12-312018-12-312017-12-31
Value114847
Percentage of DefinedBenefitPlanFairValueOfPlanAssets1100.0800.0940.0

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Period End2019-12-312018-12-312017-12-31
Value165
Percentage of DefinedBenefitPlanFairValueOfPlanAssets100.0100.0100.0

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Period End2019-12-312018-12-312017-12-31
Value114847
Percentage of DefinedBenefitPlanFairValueOfPlanAssets1100.0800.0940.0

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Period End2019-12-312018-12-312017-12-31
Value432519
Percentage of DefinedBenefitPlanFairValueOfPlanAssets4300.0416.7380.0

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Period End2019-12-312018-12-312017-12-31
Value360210158
Percentage of DefinedBenefitPlanFairValueOfPlanAssets36000.03500.03160.0

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Period End2019-12-312018-12-312017-12-31
Value432519
Percentage of DefinedBenefitPlanFairValueOfPlanAssets4300.0416.7380.0

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Period End2019-12-312018-12-312017-12-31
Value360210158
Percentage of DefinedBenefitPlanFairValueOfPlanAssets36000.03500.03160.0

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Period End2019-12-312018-12-31
Value3529
Percentage of DefinedBenefitPlanFairValueOfPlanAssets3500.0483.3

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Period End2019-12-312018-12-31
Value4152
Percentage of DefinedBenefitPlanFairValueOfPlanAssets4100.0866.7

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Period End2019-12-312018-12-31
Value4434
Percentage of DefinedBenefitPlanFairValueOfPlanAssets4400.0566.7

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Period End2019-12-312018-12-31
Value6352
Percentage of DefinedBenefitPlanFairValueOfPlanAssets6300.0866.7

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Period End2019-12-312018-12-31
Value95
Percentage of DefinedBenefitPlanFairValueOfPlanAssets900.083.3

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Period End2019-12-312018-12-31
Value220
Percentage of DefinedBenefitPlanFairValueOfPlanAssets2200.00.0

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Period End2019-12-312018-12-312017-12-31
Value111017
Percentage of DefinedBenefitPlanFairValueOfPlanAssets1100.0166.7340.0

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Period End2019-12-312018-12-312017-12-31
Value111017
Percentage of DefinedBenefitPlanFairValueOfPlanAssets1100.0166.7340.0

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Period End2019-12-312018-12-312017-12-31
Value464343
Percentage of DefinedBenefitPlanFairValueOfPlanAssets4600.0716.7860.0

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Period End2019-12-312018-12-312017-12-31
Value464343
Percentage of DefinedBenefitPlanFairValueOfPlanAssets4600.0716.7860.0

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Period End2019-12-31
Value5
Percentage of DefinedBenefitPlanFairValueOfPlanAssets500.0

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Period End2019-12-31
Value9
Percentage of DefinedBenefitPlanFairValueOfPlanAssets900.0

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Period End2019-12-31
Value4
Percentage of DefinedBenefitPlanFairValueOfPlanAssets400.0

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Period End2019-12-31
Value0.0
Percentage of DefinedBenefitPlanFairValueOfPlanAssets0.0

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Period End2019-12-312018-12-312017-12-31
Value422
Percentage of DefinedBenefitPlanFairValueOfPlanAssets400.033.340.0

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Period End2019-12-312018-12-312017-12-31
Value352115
Percentage of DefinedBenefitPlanFairValueOfPlanAssets3500.0350.0300.0

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Period End2019-12-312018-12-312017-12-31
Value422
Percentage of DefinedBenefitPlanFairValueOfPlanAssets400.033.340.0

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Period End2019-12-312018-12-312017-12-31
Value352115
Percentage of DefinedBenefitPlanFairValueOfPlanAssets3500.0350.0300.0

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Period End2019-12-312018-12-312017-12-31
Value81912
Percentage of DefinedBenefitPlanFairValueOfPlanAssets800.0316.7240.0

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Period End2019-12-312018-12-312017-12-31
Value62157103
Percentage of DefinedBenefitPlanFairValueOfPlanAssets6200.02616.72060.0

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Period End2019-12-312018-12-312017-12-31
Value81912
Percentage of DefinedBenefitPlanFairValueOfPlanAssets800.0316.7240.0

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Period End2019-12-312018-12-312017-12-31
Value62157103
Percentage of DefinedBenefitPlanFairValueOfPlanAssets6200.02616.72060.0

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Period End2019-12-31
Value12
Percentage of DefinedBenefitPlanFairValueOfPlanAssets1200.0

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Period End2019-12-31
Value100
Percentage of DefinedBenefitPlanFairValueOfPlanAssets10000.0

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Period End2019-12-312018-12-312017-12-31
Value325
Percentage of DefinedBenefitPlanFairValueOfPlanAssets300.033.3100.0

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Period End2019-12-312018-12-312017-12-31
Value261941
Percentage of DefinedBenefitPlanFairValueOfPlanAssets2600.0316.7820.0

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Period End2019-12-312018-12-312017-12-31
Value161431
Percentage of DefinedBenefitPlanFairValueOfPlanAssets1600.0233.3620.0

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Period End2019-12-312018-12-312017-12-31
Value133123265
Percentage of DefinedBenefitPlanFairValueOfPlanAssets13300.02050.05300.0

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Period End2019-12-312018-12-312017-12-31
Value131114
Percentage of DefinedBenefitPlanFairValueOfPlanAssets1300.0183.3280.0

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Period End2019-12-312018-12-312017-12-31
Value10992119
Percentage of DefinedBenefitPlanFairValueOfPlanAssets10900.01533.32380.0

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Period End2019-12-312018-12-312017-12-31
Value464024
Percentage of DefinedBenefitPlanFairValueOfPlanAssets4600.0666.7480.0

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Period End2019-12-312018-12-312017-12-31
Value380335205
Percentage of DefinedBenefitPlanFairValueOfPlanAssets38000.05583.34100.0

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Period End2019-12-312018-12-312017-12-312016-12-31
Value10010210599
Percentage of DefinedBenefitPlanFairValueOfPlanAssets10000.01700.02100.00.0

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Period End2019-12-312018-12-312017-12-312016-12-31
Value119219236246
Percentage of DefinedBenefitPlanFairValueOfPlanAssets11900.03650.04720.00.0

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Period End2019-12-312018-12-312017-12-31
Value157140137
Percentage of DefinedBenefitPlanFairValueOfPlanAssets15700.02333.32740.0

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Period End2019-12-312018-12-312017-12-31
Value551504461
Percentage of DefinedBenefitPlanFairValueOfPlanAssets55100.08400.09220.0

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Period End2019-12-312018-12-312017-12-312016-12-31
Value57383229
Percentage of DefinedBenefitPlanFairValueOfPlanAssets5700.0633.3640.00.0

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Period End2019-12-312018-12-312017-12-312016-12-31
Value432285225243
Percentage of DefinedBenefitPlanFairValueOfPlanAssets43200.04750.04500.00.0

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Period End2019-12-312018-12-312017-12-312016-12-312015-12-31
Value247214227208201
Percentage of DefinedBenefitPlanFairValueOfPlanAssets24700.03566.74540.00.00.0

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Period End2019-12-312018-12-312017-12-312016-12-312015-12-31
Value12991132122712541241
Percentage of DefinedBenefitPlanFairValueOfPlanAssets129900.018866.724540.00.00.0

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Period End2019-12-312018-12-312017-12-312016-12-31
Value32282111
Percentage of DefinedBenefitPlanFundedStatusOfPlan100.0100.0100.0100.0

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Period End2019-12-312018-12-312017-12-312016-12-31
Value62-55-92-212
Percentage of DefinedBenefitPlanFundedStatusOfPlan193.8-196.4-438.1-1927.3

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Period End2019-12-312018-12-31
Value01132
Percentage of DefinedBenefitPlanPensionPlanWithProjectedBenefitObligationInExcessOfPlanAssetsPlanAssets0.0100.0

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Period End2019-12-312018-12-31
Value291187
Percentage of DefinedBenefitPlanPensionPlanWithProjectedBenefitObligationInExcessOfPlanAssetsProjectedBenefitObligation100.0100.0

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Period End2019-12-312018-12-31
Value26367
Percentage of DefinedBenefitPlanPensionPlansWithAccumulatedBenefitObligationsInExcessOfPlanAssetsAggregateAccumulatedBenefitObligation100.0100.0

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Period End2019-12-312018-12-31
Value0326
Percentage of DefinedBenefitPlanPensionPlansWithAccumulatedBenefitObligationsInExcessOfPlanAssetsAggregateFairValueOfPlanAssets0.0100.0

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Period End2019-12-312018-12-312017-12-31
Value0.250.250.46
Percentage of DefinedBenefitPlanPlanAssetsTargetAllocationPercentage100.0100.0100.0

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Period End2019-12-312018-12-312017-12-31
Value0.750.750.54
Percentage of DefinedBenefitPlanPlanAssetsTargetAllocationPercentage300.0300.0117.4

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Period End2019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-31
Value141823644121000100001000000001211
Percentage of DerivativeFairValueOfDerivativeAsset100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.00.00.0100.00.00.00.00.0100.00.00.00.00.00.00.00.00.0100.0100.0100.0100.0

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Period End2019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-31
Value00000000000000131000000010001340
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Period End2019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-31
Value00000000111111122222233355550000
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Period End2019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302012-12-31
Value141823644232111353223233365
Percentage of DerivativeFairValueOfDerivativeAsset100.0100.0100.0100.0100.0100.0100.0100.0200.0150.0200.00.00.00.0300.00.00.00.00.0300.00.00.00.00.00.00.0

us-gaap:EstimateOfFairValueFairValueDisclosure, us-gaap:FairValueMeasurementsRecurring, us-gaap:Nondesignated



Period End2019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302012-12-31
Value141823644232111353223233365
Percentage of DerivativeFairValueOfDerivativeAsset100.0100.0100.0100.0100.0100.0100.0100.0200.0150.0200.00.00.00.0300.00.00.00.00.0300.00.00.00.00.00.00.0

us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FairValueByMeasurementFrequency, us-gaap:HedgingDesignation

us-gaap:DerivativeFairValueOfDerivativeLiability

us-gaap:FairValueInputsLevel1, us-gaap:FairValueMeasurementsRecurring, us-gaap:Nondesignated



Period End2019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-31
Value121564611022001100000000000000131
Percentage of DerivativeFairValueOfDerivativeLiability100.0100.0100.0100.0100.0100.0100.0100.00.0100.0100.00.00.0100.0100.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0100.0100.0100.0

us-gaap:FairValueInputsLevel2, us-gaap:FairValueMeasurementsRecurring, us-gaap:Nondesignated



Period End2019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-31
Value00000000000000000000010011000023
Percentage of DerivativeFairValueOfDerivativeLiability0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.066.7300.0

us-gaap:FairValueInputsLevel3, us-gaap:FairValueMeasurementsRecurring, us-gaap:Nondesignated



Period End2019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-31
Value23333333334466522222222222211000
Percentage of DerivativeFairValueOfDerivativeLiability200.0150.020.050.075.050.0300.0300.00.0150.0200.00.00.0600.0500.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:FairValueByMeasurementBasis, us-gaap:FairValueByMeasurementFrequency, us-gaap:HedgingDesignation

us-gaap:CarryingReportedAmountFairValueDisclosure, us-gaap:FairValueMeasurementsRecurring, us-gaap:Nondesignated



Period End2019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302012-12-31
Value3518979443564676222222322331
Percentage of DerivativeFairValueOfDerivativeLiability300.0250.0120.0150.0175.0150.0400.0400.00.0250.0300.00.00.0700.0600.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:EstimateOfFairValueFairValueDisclosure, us-gaap:FairValueMeasurementsRecurring, us-gaap:Nondesignated



Period End2019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302012-12-31
Value3518979443564676222222322331
Percentage of DerivativeFairValueOfDerivativeLiability300.0250.0120.0150.0175.0150.0400.0400.00.0250.0300.00.00.0700.0600.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:EmployeeRelatedLiabilitiesCurrent



Period End2019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-312010-12-312009-12-31
Value226205202223215167127137127146158
Percentage of EmployeeRelatedLiabilitiesCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:EquityMethodInvestmentDifferenceBetweenCarryingAmountAndUnderlyingEquity



Period End2019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-31
Value100018001800190024003700113059
Percentage of EquityMethodInvestmentDifferenceBetweenCarryingAmountAndUnderlyingEquity100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName

us-gaap:EquityMethodInvestmentOwnershipPercentage

wmb:AppalachiaMidstreamInvestments



Period End2019-12-312018-12-312017-12-312016-12-312015-12-31
Value0.660.660.660.410.45
Percentage of EquityMethodInvestmentOwnershipPercentage100.0100.0100.0100.0100.0

wmb:CaimanEnergyII



Period End2019-12-31
Value0.58
Percentage of EquityMethodInvestmentOwnershipPercentage87.9

wmb:DiscoveryProducerServicesLLC



Period End2019-12-31
Value0.6
Percentage of EquityMethodInvestmentOwnershipPercentage90.9

wmb:GulfstreamNaturalGasSystemLLC



Period End2019-12-31
Value0.5
Percentage of EquityMethodInvestmentOwnershipPercentage75.8

wmb:LaurelMountainMidstreamLLC



Period End2019-12-31
Value0.69
Percentage of EquityMethodInvestmentOwnershipPercentage104.5

wmb:OverlandPassPipelineCompanyLLC



Period End2019-12-31
Value0.5
Percentage of EquityMethodInvestmentOwnershipPercentage75.8

wmb:RockyMountainMidstreamHoldingsLLC



Period End2019-12-312018-12-312018-09-30
Value0.50.50.4
Percentage of EquityMethodInvestmentOwnershipPercentage75.875.80.0

us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName, us-gaap:StatementBusinessSegments

wmb:AppalachiaMidstreamInvestments, wmb:NortheastGAndP



Period End2019-12-31
Value0.66
Percentage of EquityMethodInvestmentOwnershipPercentage100.0

wmb:CaimanEnergyII, wmb:NortheastGAndP



Period End2019-12-31
Value0.58
Percentage of EquityMethodInvestmentOwnershipPercentage87.9

wmb:DiscoveryProducerServicesLLC, wmb:AtlanticGulf



Period End2019-12-31
Value0.6
Percentage of EquityMethodInvestmentOwnershipPercentage90.9

wmb:GulfstreamNaturalGasSystemLLC, wmb:AtlanticGulf



Period End2019-12-31
Value0.5
Percentage of EquityMethodInvestmentOwnershipPercentage75.8

wmb:LaurelMountainMidstreamLLC, wmb:NortheastGAndP



Period End2019-12-31
Value0.69
Percentage of EquityMethodInvestmentOwnershipPercentage104.5

wmb:OverlandPassPipelineCompanyLLC, wmb:West



Period End2019-12-31
Value0.5
Percentage of EquityMethodInvestmentOwnershipPercentage75.8

wmb:RockyMountainMidstreamHoldingsLLC, wmb:West



Period End2019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-07-30
Value0.50.50.50.50.50.430.4
Percentage of EquityMethodInvestmentOwnershipPercentage75.80.00.00.075.80.00.0

us-gaap:EquityMethodInvestmentSummarizedFinancialInformationCurrentAssets



Period End2019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-312010-12-312009-12-31
Value581834447508773599689582293321383
Percentage of EquityMethodInvestmentSummarizedFinancialInformationCurrentAssets100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:EquityMethodInvestmentSummarizedFinancialInformationCurrentLiabilities



Period End2019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-312010-12-312009-12-31
Value341605295412633850573507235229266
Percentage of EquityMethodInvestmentSummarizedFinancialInformationCurrentLiabilities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:EquityMethodInvestmentSummarizedFinancialInformationNoncurrentAssets



Period End2019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-312010-12-312009-12-31
Value119661319991819695954991351362111571440944213723
Percentage of EquityMethodInvestmentSummarizedFinancialInformationNoncurrentAssets100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:EquityMethodInvestmentSummarizedFinancialInformationNoncurrentLiabilities



Period End2019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-312010-12-312009-12-31
Value2532249115381484145095445633807125714091511
Percentage of EquityMethodInvestmentSummarizedFinancialInformationNoncurrentLiabilities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:EquityMethodInvestments



Period End2019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312012-12-312011-12-312010-12-312009-12-312008-12-31
Value6235622862616544782174276810651365526615667567386701708471257181733681988712831984007085448945204360398713901342884947
Percentage of EquityMethodInvestments100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ConsolidationItems, us-gaap:StatementBusinessSegments

us-gaap:OperatingSegments, us-gaap:CorporateAndOther



Period End2019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-31
Value0.00.00.00.00.01000000.00.00.0
Percentage of EquityMethodInvestments0.00.00.00.00.00.00.00.0

us-gaap:OperatingSegments, wmb:AtlanticGulf



Period End2019-12-312018-12-312017-12-31
Value741776823
Percentage of EquityMethodInvestments11.99.912.6

us-gaap:OperatingSegments, wmb:NortheastGAndP



Period End2019-12-312018-12-312017-12-31
Value397353195307
Percentage of EquityMethodInvestments63.768.081.0

us-gaap:OperatingSegments, wmb:West



Period End2019-12-312018-12-312017-12-31
Value15211726422
Percentage of EquityMethodInvestments24.422.16.4

us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName

wmb:AppalachiaMidstreamInvestments



Period End2019-12-312018-12-312017-12-312016-12-312015-12-312014-12-31
Value323632183104206224643033
Percentage of EquityMethodInvestments51.941.147.430.833.636.1

wmb:BrazosPermianIILLC



Period End2019-12-312018-12-312017-12-31
Value1941910
Percentage of EquityMethodInvestments3.12.40.0

wmb:CaimanEnergyII



Period End2019-12-312018-12-31
Value428412
Percentage of EquityMethodInvestments6.95.3

wmb:DiscoveryProducerServicesLLC



Period End2019-12-312018-12-31
Value472507
Percentage of EquityMethodInvestments7.66.5

wmb:GulfstreamNaturalGasSystemLLC



Period End2019-12-312018-12-31
Value217225
Percentage of EquityMethodInvestments3.52.9

wmb:JackalopeGasGatheringServicesLLC



Period End2019-12-312018-12-312017-12-31
Value03430
Percentage of EquityMethodInvestments0.04.40.0

wmb:LaurelMountainMidstreamLLC



Period End2019-12-312018-12-31
Value249314
Percentage of EquityMethodInvestments4.04.0

wmb:OtherEquityMethodInvestment



Period End2019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-312010-12-31
Value15512712719022121515020412280
Percentage of EquityMethodInvestments2.51.61.92.83.02.63.45.18.86.0

wmb:OverlandPassPipelineCompanyLLC



Period End2019-12-312018-12-31
Value403415
Percentage of EquityMethodInvestments6.55.3

wmb:RockyMountainMidstreamHoldingsLLC



Period End2019-12-312018-12-312017-12-31
Value8817760
Percentage of EquityMethodInvestments14.19.90.0

wmb:UticaEastOhioMidstreamLLC



Period End2019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-31
Value0129313831448152514110
Percentage of EquityMethodInvestments0.016.521.121.620.816.80.0

us-gaap:FiniteLivedIntangibleAssetsByMajorClass

us-gaap:FiniteLivedIntangibleAssetsAccumulatedAmortization

us-gaap:CustomerRelationships



Period End2019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-31
Value1789146512831019663310146
Percentage of FiniteLivedIntangibleAssetsAccumulatedAmortization100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:FiniteLivedIntangibleAssetsByMajorClass

us-gaap:FiniteLivedIntangibleAssetsGross

us-gaap:CustomerRelationships



Period End2019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-31
Value9560923210027106351063310763250250
Percentage of FiniteLivedIntangibleAssetsGross100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:FairValueByFairValueHierarchyLevel

us-gaap:GuaranteesFairValueDisclosure

us-gaap:FairValueInputsLevel2



Period End2019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-31
Value1113131314141414141415151414141516172525272828282929303031313132
Percentage of GuaranteesFairValueDisclosure100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:FairValueInputsLevel3



Period End2019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-31
Value1616161616161616161616161616000000000000000000
Percentage of GuaranteesFairValueDisclosure145.5123.1123.1123.1114.3114.3114.3114.3114.3114.3106.7106.7114.3114.30.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:FairValueByMeasurementBasis

us-gaap:CarryingReportedAmountFairValueDisclosure



Period End2019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302012-12-31
Value414242424343434343444444444529292930303031313131323233
Percentage of GuaranteesFairValueDisclosure372.7323.1323.1323.1307.1307.1307.1307.1307.1314.3293.3293.3314.3321.4207.1193.3181.2176.5120.0120.0114.8110.7110.7110.7110.3110.3106.5

us-gaap:EstimateOfFairValueFairValueDisclosure



Period End2019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302012-12-31
Value272929293030303030303131303014151617252527282828292931
Percentage of GuaranteesFairValueDisclosure245.5223.1223.1223.1214.3214.3214.3214.3214.3214.3206.7206.7214.3214.3100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:InterestPayableCurrent



Period End2019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-312010-12-312009-12-31
Value288282267310284268167148143162199
Percentage of InterestPayableCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

dei:LegalEntity

us-gaap:LineOfCredit

wmb:WilliamsCompaniesInc



Period End2019-12-312018-12-312018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312013-12-31
Value0160125200270400545595775850111510356503753503753700
Percentage of LineOfCredit0.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0

dei:LegalEntity

us-gaap:LineOfCreditFacilityMaximumBorrowingCapacity

wmb:WilliamsCompaniesInc



Period End2019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-08-102018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312015-02-032015-02-022014-12-31
Value450045004500450045004500450015001500150015001500150015001500150015001500150015001500150015001500
Percentage of LineOfCreditFacilityMaximumBorrowingCapacity100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:LongTermDebtAndCapitalLeaseObligations



Period End2019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-03-312009-12-312008-12-31
Value2014820719207112070322367214092131321379204342056721325218252262423932243942370123812218052128521690208881992215539120991135310359103591061010735951290338366836990248927857786008002861582597683
Percentage of LongTermDebtAndCapitalLeaseObligations100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:LongTermDebtAndCapitalLeaseObligationsCurrent



Period End2019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-03-312011-12-312011-09-302010-12-31
Value21401538156315614733250150150219510785785786976176377378801475475175111111329353361508
Percentage of LongTermDebtAndCapitalLeaseObligationsCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:FairValueByFairValueHierarchyLevel

us-gaap:LongTermDebtFairValue

us-gaap:FairValueInputsLevel2



Period End2019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-31
Value253192523425118244492333022532223262306123005229792478623055240902578924572214101960620010216352300321131215981768413790119711102611142121291238811258104269951
Percentage of LongTermDebtFairValue100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:FairValueByMeasurementBasis

us-gaap:CarryingReportedAmountFairValueDisclosure



Period End2019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302012-12-31
Value222882225722274222642241421442213152188020935210692327621825234092471725178246762398722180216602248720887206691628912849113531035810734
Percentage of LongTermDebtFairValue88.088.288.791.196.195.295.594.991.091.793.994.797.295.8102.5115.3122.3110.8100.197.898.895.792.193.294.893.986.6

us-gaap:EstimateOfFairValueFairValueDisclosure



Period End2019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302012-12-31
Value253192523425118244492333022532223262306123005229792478623055240902578924572214101960620010216352300321131215981768413790119711102612388
Percentage of LongTermDebtFairValue100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:RetirementPlanType

us-gaap:NetRegulatoryAssets

us-gaap:OtherPostretirementBenefitPlansDefinedBenefit



Period End2019-12-312018-12-312017-12-312016-12-31
Value-106-116-108-94
Percentage of NetRegulatoryAssets100.0100.0100.0100.0

us-gaap:PensionPlansDefinedBenefit



Period End2019-12-312018-12-312017-12-312016-12-31
Value-43-49-33-21
Percentage of NetRegulatoryAssets40.642.230.622.3

us-gaap:OperatingLeaseLiability



Period End2019-12-312019-09-302019-06-302019-03-31
Value209213228223
Percentage of OperatingLeaseLiability100.0100.0100.0100.0

us-gaap:OperatingLeaseLiabilityCurrent



Period End2019-12-312018-12-31
Value210
Percentage of OperatingLeaseLiabilityCurrent100.00.0

us-gaap:OtherLiabilitiesAndDeferredRevenueNoncurrent



Period End2019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302010-12-31
Value37783728376137723603437643894410395031063068310029782396247724452268231422742279222416161434141313561650177417611775173317541731171517481588
Percentage of OtherLiabilitiesAndDeferredRevenueNoncurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DebtInstrument, dei:LegalEntity

us-gaap:OtherLongTermDebt

wmb:AtlanticSunrise, wmb:TranscontinentalGasPipeLineCompanyLLC



Period End2019-12-312018-12-31
Value857807
Percentage of OtherLongTermDebt100.0100.0

wmb:Dalton, wmb:TranscontinentalGasPipeLineCompanyLLC



Period End2019-12-312018-12-31
Value259260
Percentage of OtherLongTermDebt30.232.2

us-gaap:RetirementPlanType

us-gaap:PensionAndOtherPostretirementDefinedBenefitPlansCurrentLiabilities

us-gaap:OtherPostretirementBenefitPlansDefinedBenefit



Period End2019-12-312018-12-312017-12-312016-12-31
Value6667
Percentage of PensionAndOtherPostretirementDefinedBenefitPlansCurrentLiabilities100.0100.0100.0100.0

us-gaap:PensionPlansDefinedBenefit



Period End2019-12-312018-12-312017-12-312016-12-31
Value3222
Percentage of PensionAndOtherPostretirementDefinedBenefitPlansCurrentLiabilities50.033.333.328.6

us-gaap:PreferredStockValue



Period End2019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302017-12-31
Value3535353535350
Percentage of PreferredStockValue100.0100.0100.0100.0100.0100.00.0

us-gaap:BalanceSheetLocation, us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FairValueByMeasurementFrequency, us-gaap:StatementBusinessSegments

us-gaap:PropertyPlantAndEquipmentFairValueDisclosure

us-gaap:PropertyPlantAndEquipment, us-gaap:FairValueInputsLevel3, us-gaap:FairValueMeasurementsNonrecurring, wmb:AtlanticGulf



Period End2019-12-31
Value22
Percentage of PropertyPlantAndEquipmentFairValueDisclosure100.0

us-gaap:PropertyPlantAndEquipmentByType, us-gaap:PublicUtilityRegulatedOrUnregulatedStatus

us-gaap:PublicUtilitiesPropertyPlantAndEquipmentPlantAcquisitionAdjustmentsForIntangibleUtilityPlants

wmb:AcquisitionAdjustmentIncludedInPropertyPlantAndEquipmentForUtilities, us-gaap:RegulatedOperation



Period End2019-12-312018-12-31
Value547586
Percentage of PublicUtilitiesPropertyPlantAndEquipmentPlantAcquisitionAdjustmentsForIntangibleUtilityPlants100.0100.0

us-gaap:RegulatoryAssets



Period End2019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-31
Value538598478478454418392405411
Percentage of RegulatoryAssets100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:RegulatoryAssetsCurrent



Period End2019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312010-12-31
Value7210310291848139324550393841404051
Percentage of RegulatoryAssetsCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:RegulatoryAssetsNoncurrent



Period End2019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-31
Value466495376387370337353366
Percentage of RegulatoryAssetsNoncurrent100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:RegulatoryLiabilities



Period End2019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-31
Value133713261268509438386348265206
Percentage of RegulatoryLiabilities100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:RegulatoryLiabilityCurrent



Period End2019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-31
Value60518114111915
Percentage of RegulatoryLiabilityCurrent100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:RegulatoryLiabilityNoncurrent



Period End2019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-31
Value127713211250498434375329250
Percentage of RegulatoryLiabilityNoncurrent100.0100.0100.0100.0100.0100.0100.0100.0

wmb:PerformanceObligationSource

us-gaap:RevenueRemainingPerformanceObligation

wmb:PerformanceObligationsRelatedToContractLiabilities



Period End2019-12-312019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value3418146200271191184251
Percentage of RevenueRemainingPerformanceObligation100.0100.0100.0100.0100.0100.0100.0

us-gaap:AwardType, us-gaap:PlanName

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber

us-gaap:RestrictedStockUnitsRSU, wmb:WilliamsCompaniesIncentivePlan



Period End2019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-31
Value5443333
Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber100.0100.0100.0100.0100.0100.0100.0

us-gaap:AwardType, us-gaap:PlanName

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue

us-gaap:RestrictedStockUnitsRSU, wmb:WilliamsCompaniesIncentivePlan



Period End2019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-31
Value28.1128.9631.0235.1939.3833.927.16
Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue100.0100.0100.0100.0100.0100.0100.0

us-gaap:PlanName

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAuthorized

wmb:EmployeeStockPurchasePlan



Period End2019-12-312014-05-222007-05-17
Value312
Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAuthorized100.0100.0100.0

wmb:WilliamsCompaniesIncentivePlan



Period End2019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312014-05-222010-05-202007-05-17
Value402426272831101119
Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAuthorized1111.10.00.00.00.00.0625.00.0950.0

us-gaap:PlanName

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAvailableForGrant

wmb:EmployeeStockPurchasePlan



Period End2019-12-312018-12-312017-12-312016-12-312015-12-312014-12-31
Value001111
Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAvailableForGrant100.0100.0100.0100.0100.0100.0

wmb:WilliamsCompaniesIncentivePlan



Period End2019-12-312018-12-312017-12-312016-12-312015-12-312014-12-31
Value111215171922
Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAvailableForGrant2594.31608.61363.61214.31266.71222.2

us-gaap:StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest



Period End2019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312009-09-302009-06-302009-03-312008-12-312007-12-312006-12-31
Value1636416859170811572515997169591544715903161751488215181154091404614224144221562416225182601917119581201722068111922871789218946797178707427599156273724308392539045887986198176902689629019885588538856905478057154
Percentage of StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:StatementEquityComponents

us-gaap:AccumulatedOtherComprehensiveIncome



Period End2019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312010-12-312009-12-312008-12-312007-12-312006-12-31
Value-199-266-265-267-270-291-293-294-238-331-331-334-339-331-369-378-442-425-384-395-341-222-194-223-164-338-394-374-362-330-357-367-389-82-168-80-121-60
Percentage of StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest-1.2-1.6-1.6-1.7-1.7-1.7-1.9-1.8-1.5-2.2-2.2-2.2-2.4-2.3-2.6-2.4-2.7-2.3-2.0-2.0-1.7-1.1-1.6-2.6-1.8-3.8-4.9-4.8-4.9-5.5-6.3-9.9-12.6-1.0-1.9-0.9-1.6-0.8

us-gaap:AdditionalPaidInCapital



Period End2019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312010-12-312009-12-312008-12-312007-12-312006-12-31
Value2432324310242962470324693246801855218533185081849218471184451488714930148491483314807148331481214779149251492514890115451159911582112741125811134944993058269841782698135807467486605
Percentage of StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest148.6144.2142.2157.1154.4145.5120.1116.5114.4124.3121.7119.7106.0105.0103.094.991.381.277.375.574.072.2124.9132.4130.0129.5141.4143.0149.9157.7165.4222.0273.095.990.289.286.592.3

us-gaap:CommonStock



Period End2019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312010-12-312009-12-312008-12-312007-12-312006-12-31
Value124712471246124612451245862862861861861861785785785785784784784783782782782720718718718717716662661630626620618613608603
Percentage of StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest7.67.47.37.97.87.35.65.45.35.85.75.65.65.55.45.04.84.34.14.03.93.86.68.38.08.09.09.19.611.011.716.920.37.26.96.87.88.4

us-gaap:NoncontrollingInterest



Period End2019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312009-09-302009-06-302009-03-312008-12-312007-12-312006-12-31
Value300132383233131913371349610264306519677368756965940393649592993310077108731124311369113951155240594101405739983277307526752899266617841290134413291342133111511047138957254852953061414301081
Percentage of StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest18.319.218.98.48.48.039.540.440.345.545.345.266.965.866.563.662.159.558.658.156.555.934.047.045.544.741.139.136.048.447.447.941.814.514.715.115.414.111.615.56.36.26.06.06.818.315.1

us-gaap:Parent



Period End2019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312009-09-302009-06-302009-03-312008-12-312007-12-31
Value1336313621138481440614660156109345947396568109830684444643486048305691614873877928821287779129786346164864494846944795475230922961194017937909771675377288702579797573844783078324832684406375
Percentage of StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest81.780.881.191.691.692.060.559.659.754.554.754.833.134.233.536.437.940.541.441.943.544.166.053.054.555.358.960.964.051.652.652.158.285.585.384.984.685.988.484.593.793.894.094.093.281.7

us-gaap:PreferredStock



Period End2019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312016-12-312015-12-31
Value35353535353500000
Percentage of StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest0.20.20.20.20.20.20.00.00.00.00.0

us-gaap:RetainedEarnings



Period End2019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312010-12-312009-12-312008-12-312007-12-312006-12-31
Value-11002-10664-10423-10270-10002-9018-8735-8587-8434-9872-9654-9487-9649-9483-9394-8508-7960-6764-6243-5914-5548-5315-6574-6385-6248-5973-5863-5765-5695-5648-5607-5551-5820-478903874-293-1034
Percentage of StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest-67.2-63.3-61.0-65.3-62.5-53.2-56.5-54.0-52.1-66.3-63.6-61.6-68.7-66.7-65.1-54.5-49.1-37.0-32.6-30.2-27.5-25.7-55.1-73.2-70.0-66.8-73.6-73.3-76.7-94.3-99.6-149.1-188.8-5.510.09.7-3.8-14.5

us-gaap:TreasuryStock



Period End2019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312010-12-312009-12-312008-12-312007-12-312006-12-31
Value-1041-1041-1041-1041-1041-1041-1041-1041-1041-1041-1041-1041-1041-1041-1041-1041-1041-1041-1041-1041-1041-1041-1041-1041-1041-1041-1041-1041-1041-1041-1041-1041-1041-1041-1041-1041-567-41
Percentage of StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest-6.4-6.2-6.1-6.6-6.5-6.1-6.7-6.5-6.4-7.0-6.9-6.8-7.4-7.3-7.2-6.7-6.4-5.7-5.4-5.3-5.2-5.0-8.7-11.9-11.7-11.6-13.1-13.2-14.0-17.4-18.5-28.0-33.8-12.1-11.5-11.5-7.3-0.6

us-gaap:UnamortizedDebtIssuanceExpense



Period End2019-12-312018-12-312017-12-312016-12-312015-12-312014-12-31
Value119131122119123108
Percentage of UnamortizedDebtIssuanceExpense100.0100.0100.0100.0100.0100.0

us-gaap:UnrecognizedTaxBenefitsIncomeTaxPenaltiesAndInterestAccrued



Period End2019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-312010-12-312009-12-31
Value33232241671510493
Percentage of UnrecognizedTaxBenefitsIncomeTaxPenaltiesAndInterestAccrued100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:UnrecognizedTaxBenefitsThatWouldImpactEffectiveTaxRate



Period End2019-12-312018-12-312017-12-312016-12-312015-12-31
Value5151504951
Percentage of UnrecognizedTaxBenefitsThatWouldImpactEffectiveTaxRate100.0100.0100.0100.0100.0

us-gaap:ValuationAllowancesAndReservesType

us-gaap:ValuationAllowancesAndReservesBalance

us-gaap:ValuationAllowanceOfDeferredTaxAssets



Period End2019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-312010-12-312009-12-312008-12-312007-12-31
Value319320224334190206181144145249289224274
Percentage of ValuationAllowancesAndReservesBalance100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:BalanceSheetLocation, us-gaap:VariableInterestEntitiesByClassificationOfEntity

us-gaap:VariableInterestEntityConsolidatedCarryingAmountAssets

us-gaap:AccountsReceivable, us-gaap:VariableInterestEntityPrimaryBeneficiary



Period End2019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-03-312013-12-312013-06-302012-12-31
Value167152131506257800718972778688861925837720726715359715210010
Percentage of VariableInterestEntityConsolidatedCarryingAmountAssets100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0100.00.0

us-gaap:CashAndCashEquivalents, us-gaap:VariableInterestEntityPrimaryBeneficiary



Period End2019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302012-12-31
Value1029011826333225512688811165190862514568911037081915811368783612258608
Percentage of VariableInterestEntityConsolidatedCarryingAmountAssets61.159.290.152.053.256.131.9176.690.6149.7277.372.615.78.112.614.298.6152.8154.281.7217.30.00.0360.00.00.06000.00.0

us-gaap:OtherCurrentAssets, us-gaap:VariableInterestEntityPrimaryBeneficiary



Period End2019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312013-12-31
Value556121260198176183191157205379177159223330
Percentage of VariableInterestEntityConsolidatedCarryingAmountAssets3.03.34.62.03.21.832.527.618.123.527.818.222.245.324.621.92.83.85.14.25.80.0

us-gaap:OtherIntangibleAssets, us-gaap:VariableInterestEntityPrimaryBeneficiary



Period End2019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312013-12-31
Value2669269727241166117711898405864387908872948095699662975197919880143614481461147414930
Percentage of VariableInterestEntityConsolidatedCarryingAmountAssets1598.21774.32079.42332.01898.42086.01050.61203.8904.31140.41377.91111.41044.51165.01359.91360.92022.52732.12476.32076.12871.20.0

us-gaap:OtherNoncurrentAssets, us-gaap:VariableInterestEntityPrimaryBeneficiary



Period End2019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312013-12-31
Value1313101005375285074674504534674584594970033140
Percentage of VariableInterestEntityConsolidatedCarryingAmountAssets7.88.67.62.00.00.067.173.552.260.065.452.650.554.763.868.50.00.05.14.226.90.0

us-gaap:PropertyPlantAndEquipment, us-gaap:VariableInterestEntityPrimaryBeneficiary



Period End2019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302012-12-31
Value57456167618623332363239828718285472791227411276722736428021278392781128816300029372882287727941494138712091111897556
Percentage of VariableInterestEntityConsolidatedCarryingAmountAssets3440.14057.24722.14666.03811.34207.03589.83975.92871.63523.34022.13178.23029.33326.03862.63969.14225.45541.54884.74052.15373.10.00.012090.00.00.00.0

us-gaap:BalanceSheetLocation, us-gaap:VariableInterestEntitiesByClassificationOfEntity

us-gaap:VariableInterestEntityConsolidatedCarryingAmountLiabilities

us-gaap:AccountsPayable, us-gaap:VariableInterestEntityPrimaryBeneficiary



Period End2019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302012-12-31
Value585467151516841755957751711656589592669648593932404883120153145135105128
Percentage of VariableInterestEntityConsolidatedCarryingAmountLiabilities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:AccruedLiabilities, us-gaap:VariableInterestEntityPrimaryBeneficiary



Period End2019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302012-12-31
Value661001381151159882468285781810221099112280166669314112236360443210
Percentage of VariableInterestEntityConsolidatedCarryingAmountLiabilities113.8185.2206.0766.7766.7612.598.090.389.6108.9143.7167.5190.5135.399.6106.923.728.268.890.075.00.03.32.62.11.51.00.0

us-gaap:OtherNoncurrentLiabilities, us-gaap:VariableInterestEntityPrimaryBeneficiary



Period End2019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302012-12-31
Value28326827213701893269322116901986197219511860131412751220331342357389395178130130115110109
Percentage of VariableInterestEntityConsolidatedCarryingAmountLiabilities487.9496.3406.0913.30.01181.2388.7426.6176.6264.4277.4297.4315.8222.0190.6188.3561.0876.91115.6972.5822.9214.5108.385.079.381.585.2

us-gaap:RetirementPlanType

wmb:AmountsIncludedInNetRegulatoryLiabilitiesAssetsAssociatedWithOurFederalEnergyRegulatoryCommissionRegulatedGasPipelinesNetActuarialGainLoss

us-gaap:OtherPostretirementBenefitPlansDefinedBenefit



Period End2019-12-312018-12-312017-12-312016-12-31
Value114148
Percentage of AmountsIncludedInNetRegulatoryLiabilitiesAssetsAssociatedWithOurFederalEnergyRegulatoryCommissionRegulatedGasPipelinesNetActuarialGainLoss100.0100.0100.0100.0

Line plots across dimensions of each concept

us-gaap:Revenues us-gaap:ProductOrService


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


us-gaap:Revenues us-gaap:ConsolidationItems, us-gaap:ProductOrService


us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:ProductOrService


us-gaap:CostOfGoodsAndServiceExcludingDepreciationDepletionAndAmortization us-gaap:ProductOrService


us-gaap:ProfitLoss us-gaap:StatementEquityComponents


us-gaap:Assets us-gaap:StatementBusinessSegments


us-gaap:ReceivablesNetCurrent us-gaap:ProductOrService


us-gaap:PropertyPlantAndEquipmentGross us-gaap:PropertyPlantAndEquipmentByType, us-gaap:PublicUtilityRegulatedOrUnregulatedStatus


us-gaap:PropertyPlantAndEquipmentGross us-gaap:PropertyPlantAndEquipmentByType, us-gaap:PublicUtilityRegulatedOrUnregulatedStatus


us-gaap:Goodwill us-gaap:StatementBusinessSegments


us-gaap:AccumulatedOtherComprehensiveIncomeLossNetOfTax us-gaap:StatementEquityComponents


us-gaap:ProfitLoss us-gaap:StatementEquityComponents


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


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