OKE


Line plots across dimensions of each concept
Tables

Table of contents



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

us-gaap:CommonStockSharesIssued

us-gaap:CommonStockSharesOutstanding

us-gaap:CommonStockSharesAuthorized

us-gaap:WeightedAverageNumberOfDilutedSharesOutstanding

us-gaap:WeightedAverageNumberOfSharesOutstandingBasic

us-gaap:EarningsPerShareBasic

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

us-gaap:Revenues
us-gaap:MajorCustomers
us-gaap:MajorCustomers, us-gaap:StatementBusinessSegments, oke:RegulatedSegmentByName
us-gaap:ProductOrService
us-gaap:ProductOrService, us-gaap:StatementBusinessSegments
us-gaap:StatementBusinessSegments
us-gaap:StatementBusinessSegments, oke:IntersegmentRevenuesbyName
us-gaap:StatementBusinessSegments, oke:RegulatedSegmentByName

us-gaap:CostOfRevenue
us-gaap:StatementBusinessSegments
us-gaap:StatementBusinessSegments, oke:RegulatedSegmentByName

us-gaap:OperatingIncomeLoss

us-gaap:InterestExpense

us-gaap:IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest

us-gaap:IncomeTaxExpenseBenefit

us-gaap:ProfitLoss
us-gaap:StatementEquityComponents

us-gaap:ComprehensiveIncomeNetOfTax

us-gaap:NetIncomeLossAvailableToCommonStockholdersBasic

us-gaap:Assets
us-gaap:StatementBusinessSegments

us-gaap:LiabilitiesAndStockholdersEquity

us-gaap:StockholdersEquity
us-gaap:StatementEquityComponents

us-gaap:AssetsCurrent

us-gaap:CashAndCashEquivalentsAtCarryingValue

us-gaap:ReceivablesNetCurrent

us-gaap:InventoryNet

us-gaap:OtherAssetsCurrent

us-gaap:PropertyPlantAndEquipmentGross

us-gaap:AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment

us-gaap:PropertyPlantAndEquipmentNet

us-gaap:Goodwill
oke:ReportableSegmentByName

us-gaap:IntangibleAssetsNetIncludingGoodwill

us-gaap:OtherAssetsNoncurrent

us-gaap:LiabilitiesCurrent

us-gaap:LongTermDebtCurrent

us-gaap:AccountsPayableCurrent

us-gaap:TaxesPayableCurrent

us-gaap:OtherLiabilitiesCurrent

us-gaap:LongTermDebt

us-gaap:LongTermDebtNoncurrent

us-gaap:DeferredTaxLiabilitiesNoncurrent

us-gaap:OtherLiabilitiesNoncurrent

us-gaap:StockholdersEquity
us-gaap:StatementEquityComponents

us-gaap:CommonStockValue

us-gaap:RetainedEarningsAccumulatedDeficit

us-gaap:TreasuryStockValue

us-gaap:AccumulatedOtherComprehensiveIncomeLossNetOfTax

us-gaap:NetCashProvidedByUsedInOperatingActivities

us-gaap:NetCashProvidedByUsedInInvestingActivities

us-gaap:NetCashProvidedByUsedInFinancingActivities

us-gaap:NetCashProvidedByUsedInOperatingActivities

us-gaap:ProfitLoss
us-gaap:StatementEquityComponents

us-gaap:DepreciationDepletionAndAmortization
us-gaap:StatementBusinessSegments

us-gaap:IncreaseDecreaseInOtherOperatingCapitalNet

us-gaap:IncreaseDecreaseInInventories

us-gaap:NetCashProvidedByUsedInInvestingActivities

us-gaap:PaymentsToAcquirePropertyPlantAndEquipment
us-gaap:StatementBusinessSegments

us-gaap:NetCashProvidedByUsedInFinancingActivities

us-gaap:ProceedsFromIssuanceOfLongTermDebt

us-gaap:RepaymentsOfLongTermDebt

us-gaap:PaymentsOfDividends

us-gaap:PaymentsOfDividends

us-gaap:RepaymentsOfLongTermDebt
oke:LeaseDescription
us-gaap:OperatingLeaseRightOfUseAsset

us-gaap:CashAndCashEquivalentsPeriodIncreaseDecrease

us-gaap:ProceedsFromRepaymentsOfShortTermDebt
us-gaap:StatementBusinessSegments
oke:AdjustedEBITDA
us-gaap:DerivativeInstrumentRisk, us-gaap:DerivativeInstrumentsGainLossByHedgingRelationship, us-gaap:IncomeStatementLocation
oke:DerivativeInstrumentsGainLossReclassifiedfromAccumulatedOCIintoIncomeNet
us-gaap:DerivativeInstrumentsGainLossByHedgingRelationship
us-gaap:DerivativeInstrumentRisk, us-gaap:DerivativeInstrumentsGainLossByHedgingRelationship
oke:DerivativeInstrumentsGainLossRecognizedinOtherComprehensiveLossNet
us-gaap:DerivativeInstrumentsGainLossByHedgingRelationship
us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName, oke:ReportableSegmentByName
oke:ImpairmentOfEquityMethodInvestmentDifferenceBetweenCarryingAmountAndUnderlyingEquity

oke:Impairmentoflonglivedassetsgoodwillandotherassetimpairmentcharges

oke:OtherComprehensiveIncomeLossPortionAttributabletoEquityMethodInvestmentsNetofTax

oke:OtherComprehensiveIncomeLossPortionAttributabletoEquityMethodInvestmentsTax

oke:OtherCorporateCostsandNoncashItems
us-gaap:StatementBusinessSegments
oke:PublicUtilitiesAllowanceforFundsUsedDuringConstructionCapitalizedCostofEquityandOther

us-gaap:AssetImpairmentCharges
us-gaap:StatementBusinessSegments

us-gaap:CommonStockDividendsPerShareCashPaid

us-gaap:DeferredIncomeTaxExpenseBenefit
us-gaap:RetirementPlanType
us-gaap:DefinedBenefitPlanAmortizationOfGainsLosses
us-gaap:RetirementPlanType
us-gaap:DefinedBenefitPlanAmortizationOfPriorServiceCostCredit
us-gaap:RetirementPlanType, us-gaap:SubsequentEventType
us-gaap:DefinedBenefitPlanContributionsByEmployer
us-gaap:RetirementPlanType
us-gaap:DefinedBenefitPlanExpectedReturnOnPlanAssets
us-gaap:RetirementPlanType
us-gaap:DefinedBenefitPlanInterestCost
us-gaap:RetirementPlanType
us-gaap:DefinedBenefitPlanNetPeriodicBenefitCost
us-gaap:RetirementPlanType
us-gaap:DefinedBenefitPlanServiceCost

us-gaap:DirectOperatingCosts
us-gaap:StatementBusinessSegments

us-gaap:DividendsCommonStock
us-gaap:StatementEquityComponents

us-gaap:DividendsPreferredStock
us-gaap:StatementEquityComponents
us-gaap:SubsequentEventType

us-gaap:EmployeeBenefitsAndShareBasedCompensationNoncash

us-gaap:EquityMethodInvestmentDividendsOrDistributions

us-gaap:EquityMethodInvestmentOtherThanTemporaryImpairment
us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName, oke:ReportableSegmentByName

us-gaap:FairValueNetDerivativeAssetLiabilityMeasuredOnRecurringBasisUnobservableInputsReconciliationGainLossIncludedInOtherComprehensiveIncomeLoss

us-gaap:FairValueNetDerivativeAssetLiabilityMeasuredOnRecurringBasisUnobservableInputsReconciliationSettlements

us-gaap:FairValueNetDerivativeAssetLiabilityMeasuredOnRecurringBasisUnobservableInputsReconciliationTransfersIntoLevel3

us-gaap:FinanceLeasePrincipalPayments

us-gaap:GainLossOnSaleOfPropertyPlantEquipment

us-gaap:GainsLossesOnExtinguishmentOfDebt
oke:ReportableSegmentByName
us-gaap:ImpairmentOfLongLivedAssetsHeldForUse

us-gaap:IncomeLossFromEquityMethodInvestments
us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName
us-gaap:StatementBusinessSegments

us-gaap:IncreaseDecreaseInAccountsPayable

us-gaap:IncreaseDecreaseInDerivativeAssetsAndLiabilities

us-gaap:IncreaseDecreaseInInterestPayableNet

us-gaap:IncreaseDecreaseInReceivables

us-gaap:InterestCostsCapitalized

us-gaap:NetIncomeLossAttributableToParentDiluted

us-gaap:OperatingLeasePayments

us-gaap:OtherComprehensiveIncomeLossNetOfTax
us-gaap:StatementEquityComponents

us-gaap:OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentNetOfTax

us-gaap:OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansTax

us-gaap:OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIOnDerivativesNetOfTax

us-gaap:OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIOnDerivativesTax

us-gaap:OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetGainLossTax

us-gaap:OtherComprehensiveIncomeUnrealizedGainLossOnDerivativesArisingDuringPeriodNetOfTax

us-gaap:OtherComprehensiveIncomeUnrealizedGainLossOnDerivativesArisingDuringPeriodTax

us-gaap:OtherCostAndExpenseOperating

us-gaap:OtherNonoperatingExpense

us-gaap:OtherNonoperatingIncome

us-gaap:OtherOperatingActivitiesCashFlowStatement

us-gaap:PaymentsForProceedsFromOtherInvestingActivities

us-gaap:PaymentsOfFinancingCosts

us-gaap:PreferredStockDividendsIncomeStatementImpact

us-gaap:ProceedsFromEquityMethodInvestmentDividendsOrDistributionsReturnOfCapital

us-gaap:ProceedsFromPaymentsForOtherFinancingActivities

us-gaap:PublicUtilitiesAllowanceForFundsUsedDuringConstructionCapitalizedCostOfEquity
dei:LegalEntity
us-gaap:RelatedPartyTransactionExpensesFromTransactionsWithRelatedParty

us-gaap:RightOfUseAssetObtainedInExchangeForOperatingLeaseLiability

us-gaap:StockIssuedDuringPeriodValueOther
us-gaap:StatementEquityComponents

us-gaap:StockholdersEquityOther
us-gaap:StatementEquityComponents

us-gaap:TaxesExcludingIncomeAndExciseTaxes

us-gaap:WeightedAverageNumberDilutedSharesOutstandingAdjustment

oke:AccumulatedOtherComprehensiveIncomeLossCumulativeChangeinOtherComprehensiveIncomeLossfromEquityMethodInvestmentsEffectNetofTax

oke:CommodityExchangesAndImbalances

oke:CommodityExchangesAndImbalancesLiabilitiesCurrent

oke:DerivativeCollateralRighttoReclaimCashTotal

oke:UnamortizedPortionofTerminatedSwaps

us-gaap:AccountsPayableRelatedPartiesCurrent

us-gaap:AccumulatedOtherComprehensiveIncomeLossCumulativeChangesInNetGainLossFromCashFlowHedgesEffectNetOfTax

us-gaap:AccumulatedOtherComprehensiveIncomeLossDefinedBenefitPensionAndOtherPostretirementPlansNetOfTax

us-gaap:AdditionalPaidInCapital
us-gaap:ConsolidatedEntities
us-gaap:CommercialPaper

us-gaap:ContractWithCustomerLiability

us-gaap:ContractWithCustomerLiabilityCurrent

us-gaap:ContractWithCustomerLiabilityNoncurrent

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

us-gaap:DebtInstrumentUnamortizedDiscountPremiumAndDebtIssuanceCostsNet

us-gaap:DerivativeAssetCollateralObligationToReturnCashOffset
us-gaap:DerivativeInstrumentRisk, us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FairValueByMeasurementFrequency
us-gaap:DerivativeAssetFairValueGrossAssetIncludingNotSubjectToMasterNettingArrangement
us-gaap:DerivativeInstrumentRisk, us-gaap:FairValueByMeasurementBasis, us-gaap:FairValueByMeasurementFrequency
us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FairValueByMeasurementFrequency
us-gaap:FairValueByMeasurementBasis, us-gaap:FairValueByMeasurementFrequency
us-gaap:DerivativeInstrumentRisk, us-gaap:FairValueByMeasurementFrequency
us-gaap:DerivativeAssetFairValueGrossLiabilityAndObligationToReturnCashOffset
us-gaap:FairValueByMeasurementFrequency
us-gaap:DerivativeInstrumentRisk, us-gaap:FairValueByMeasurementFrequency
us-gaap:DerivativeAssets
us-gaap:FairValueByMeasurementFrequency
us-gaap:BalanceSheetLocation, us-gaap:DerivativeInstrumentRisk, us-gaap:HedgingDesignation, oke:DerivativeInstrumentContractTypeBySubtype
us-gaap:DerivativeFairValueOfDerivativeAsset
us-gaap:HedgingDesignation
us-gaap:BalanceSheetLocation, us-gaap:DerivativeInstrumentRisk, us-gaap:HedgingDesignation
us-gaap:DerivativeFairValueOfDerivativeLiability
us-gaap:BalanceSheetLocation, us-gaap:DerivativeInstrumentRisk, us-gaap:HedgingDesignation, oke:DerivativeInstrumentContractTypeBySubtype
us-gaap:HedgingDesignation
us-gaap:DerivativeInstrumentRisk, us-gaap:FairValueByMeasurementFrequency
us-gaap:DerivativeLiabilities
us-gaap:FairValueByMeasurementFrequency
us-gaap:DerivativeInstrumentRisk, us-gaap:FairValueByMeasurementFrequency
us-gaap:DerivativeLiabilityFairValueGrossAssetAndRightToReclaimCashOffset
us-gaap:FairValueByMeasurementFrequency
us-gaap:DerivativeInstrumentRisk, us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FairValueByMeasurementFrequency
us-gaap:DerivativeLiabilityFairValueGrossLiabilityIncludingNotSubjectToMasterNettingArrangement
us-gaap:DerivativeInstrumentRisk, us-gaap:FairValueByMeasurementBasis, us-gaap:FairValueByMeasurementFrequency
us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FairValueByMeasurementFrequency
us-gaap:FairValueByMeasurementBasis, us-gaap:FairValueByMeasurementFrequency
us-gaap:DerivativeInstrumentRisk, us-gaap:HedgingDesignation, oke:DerivativeInstrumentByMethodForSettingNotionalAmount, oke:DerivativePositonByTransactionType, oke:DerivativesByCommodity
us-gaap:DerivativeNonmonetaryNotionalAmount
us-gaap:DerivativeInstrumentRisk, us-gaap:DerivativeInstrumentsGainLossByHedgingRelationship, us-gaap:LongtermDebtType, oke:DerivativeInstrumentByMethodForSettingNotionalAmount
us-gaap:DerivativeNotionalAmount
us-gaap:DerivativeInstrumentRisk, us-gaap:HedgingDesignation, oke:DerivativePositonByTransactionType
us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName, oke:ReportableSegmentByName
us-gaap:EquityMethodInvestmentOwnershipPercentage

us-gaap:EquityMethodInvestments
us-gaap:StatementBusinessSegments

us-gaap:FairValueNetDerivativeAssetLiabilityMeasuredOnRecurringBasisWithUnobservableInputs

us-gaap:InterestPayableCurrent
us-gaap:DerivativeInstrumentRisk, us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FairValueByMeasurementFrequency
us-gaap:InterestRateDerivativeLiabilitiesAtFairValue
us-gaap:DerivativeInstrumentRisk, us-gaap:FairValueByMeasurementBasis, us-gaap:FairValueByMeasurementFrequency
us-gaap:DerivativeInstrumentRisk, us-gaap:FairValueByMeasurementFrequency

us-gaap:InvestmentsAndOtherNoncurrentAssets

us-gaap:LiabilitiesOtherThanLongtermDebtNoncurrent

us-gaap:LongTermDebtFairValue

us-gaap:MaterialsSuppliesAndOther
oke:LeaseDescription
us-gaap:OperatingLeaseLiability

us-gaap:OperatingLeaseLiabilityCurrent

us-gaap:OperatingLeaseLiabilityNoncurrent

us-gaap:PreferredStockParOrStatedValuePerShare

us-gaap:PreferredStockSharesIssued

us-gaap:RevenueRemainingPerformanceObligation
oke:RevenueRemainingPerformanceObligation
us-gaap:DebtInstrument
us-gaap:SeniorLongTermNotes

us-gaap:ShortTermBorrowings
us-gaap:ConsolidatedEntities
us-gaap:ShortTermDebtWeightedAverageInterestRate

us-gaap:TreasuryStockShares

Tables

  2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
us-gaap:CommonStockValue ████████████▃▃▃▃▃▃▃▃▃▃▃▃▃▃▃▃▃▃▃▃▁▁▁▁▁▁44444444444422222222222222222222111111NANANA
 us-gaap:SharesIssued us-gaap:StatementEquityComponents us-gaap:CommonStock▁█▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁445445016445445445445445445445423415414245245245245245245245245245245245245245245245245245245245245122122122122122122NANANA
 us-gaap:SharesIssued us-gaap:StatementEquityComponents us-gaap:PreferredStock▁█▁▁▁▁▁▁▁▁▁▁▁▁▁▁02000000000000000NA0NANANA0NANANANANANANANANANANANANANANANANANANA
us-gaap:CommonStockSharesIssued █████████▇▇▇▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁445445445445445445445445445423415414245245245245245245245245245245245245245245245245245245245245NA122122122122122NANANA
us-gaap:CommonStockSharesOutstanding █████████▇▇▇▃▃▃▃▃▃▃▃▃▃▃▃▃▃▃▃▃▃▃▃▁▁▁▁▁▁413413413412412411411411411388381380210210210210210209209208208208208207207206206206206204204205103103102103107106NANANA
us-gaap:CommonStockSharesAuthorized ████████████▃▃▃▃▃▃▃▃▃▃▃▃▃▃▃▃▃▃▃▃▁▁▁▁▁▁120012001200120012001200120012001200120012001200600600600600600600600600600600600600600600600600600600600600300300300300300300NANANA
us-gaap:WeightedAverageNumberOfDilutedSharesOutstanding 415NA415415415NA414414412NA383214213NA212212211NA210210210NA210210210NA209208209NA20900NA000NA000
us-gaap:WeightedAverageNumberOfSharesOutstandingBasic 414NA413413412NA412411409NA380211211NA211211210NA210210209NA209209209NA206206205NA20500NA000NA000
us-gaap:EarningsPerShareBasic ▁████▇█▇▇▄▆▅▆▆▆▆▅▄▅▅▅▆▅▅▆-0.340.770.750.750.820.710.760.680.650.160.430.340.410.429999999999999940.440.410.40.12999999999999990.390.360.290.449999999999999960.310.290.45NA0.30.00.55NA0.320.291.181.10999999999999990.580.521.220.77999999999999980.520.391.46
us-gaap:EarningsPerShareDiluted ▁████▇█▇▇▄▆▅▆▆▆▆▆▄▅▅▅▆▅▅▆-0.340.770.740.750.810.70.750.680.640.160.430.330.410.429999999999999940.430.40.40.119999999999999880.390.360.290.449999999999999960.310.290.45NA0.30.00.54NA0.310.291.161.080.570.511.190.76000000000000020.510.391.44
  2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
 us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:ProductOrService,us-gaap:StatementBusinessSegments oke:GatheringandExchangeServicesRevenue,oke:NaturalGasGatheringAndProcessing▁▂▇█▃▄▆▇▂373842433940414238NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
 us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:ProductOrService,us-gaap:StatementBusinessSegments oke:GatheringandExchangeServicesRevenue,oke:NaturalGasLiquids█▅▅▅▄▆▇▃▁120104105105981081169683NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
 us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:ProductOrService,us-gaap:StatementBusinessSegments oke:GatheringandExchangeServicesRevenue,oke:TotalSegments█▅▆▆▄▆█▄▁158142147149138149157139121NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
 us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:ProductOrService,us-gaap:StatementBusinessSegments oke:NGLandCondensateSales,oke:NaturalGasGatheringAndProcessing▁▄▂▃▄▆█▇▆219334244312332413501447413NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
 us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:ProductOrService,us-gaap:StatementBusinessSegments oke:NGLandCondensateSales,oke:NaturalGasLiquids▁▄▂▃▄▆█▆▆159620841746192121582435286124692552NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
 us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:ProductOrService,us-gaap:StatementBusinessSegments oke:NGLandCondensateSales,oke:TotalSegments▁▄▂▃▄▆█▆▆181624181991223424902849336329172965NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
 us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:ProductOrService,us-gaap:StatementBusinessSegments oke:ResidueNaturalGasSales,oke:NaturalGasGatheringAndProcessing▁▃▁▂▆█▃▂▄189240185221319375245208254NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
 us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:ProductOrService,us-gaap:StatementBusinessSegments oke:ResidueNaturalGasSales,oke:NaturalGasPipelines▄▁▁▁▁▆▁▁█200003004NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
 us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:ProductOrService,us-gaap:StatementBusinessSegments oke:ResidueNaturalGasSales,oke:TotalSegments▁▃▁▂▆█▃▂▄191240185221320378246208259NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
 us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:ProductOrService,us-gaap:StatementBusinessSegments oke:TransportationandStorageRevenue,oke:NaturalGasLiquids▅█▃▁▆█▂▂▆505646425255454553NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
 us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:ProductOrService,us-gaap:StatementBusinessSegments oke:TransportationandStorageRevenue,oke:NaturalGasPipelines▄█▃▃▂▂▂▁▂118148108105103104989398NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
 us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:ProductOrService,us-gaap:StatementBusinessSegments oke:TransportationandStorageRevenue,oke:TotalSegments▄█▃▂▃▃▂▁▂169204154148155159143138151NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:Revenues ▂▄▂▃▄▅▆▅▅▇▄▄▄▄▃▂▁▁▁▂▁▄▅▅▅█▆▆▆▇▅▃▆█▆▆▇▅▄▄▇21362663226324572779313633932960310237922906272527492654235721341774193018982128180528443120306631634140357133493541365930282529341440713595351438663280294228073923
 us-gaap:Revenues us-gaap:MajorCustomers,us-gaap:StatementBusinessSegments,oke:RegulatedSegmentByName us-gaap:OperatingSegments,oke:NaturalGasLiquids,oke:NaturalGasLiquidsRegulated█▆▄▂▂▄▂▁378347315267270315276255NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
 us-gaap:Revenues us-gaap:ProductOrService oke:CommoditySales▁▄▂▃▅▇█▆18082348194721462472281630832675NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
 us-gaap:Revenues us-gaap:ProductOrService oke:NGLandCondensateSales▁▄▂▃▄▆█▆▆161721071761192321522439283624682557NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
 us-gaap:Revenues us-gaap:ProductOrService oke:Services█▆▆▅▄▇▅▁328315315310306319310285NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
 us-gaap:Revenues us-gaap:StatementBusinessSegments oke:NaturalGasGatheringAndProcessing▁▄▂▃▅▇▆▅▅█▆▅▄▄▂▂▁▂▁▁▁▅▆▅▆▄▃▂▁449615476582694834791700707896782685661630512476432487434460455704777723762598533482437NANANANANANANANANANANANA
 us-gaap:Revenues us-gaap:StatementBusinessSegments oke:NaturalGasLiquids▂▄▃▃▄▅▇▅▅█▅▄▄▄▃▂▁▂▁▂▁▄▆▅▆▇▆▅▄17702247190020722311260130262613269233822501234923912277203918711487162316111848149624332734266527113147287424912264NANANANANANANANANANANANA
 us-gaap:Revenues us-gaap:StatementBusinessSegments oke:TotalSegments▂▄▂▃▄▆▇▅▅█▅▄▄▄▃▂▁23412980249827723122355339223414351043873391313331603020264324362005NANANANANANANANANANANANANANANANANANANANANANANANA
 us-gaap:Revenues us-gaap:StatementBusinessSegments,oke:RegulatedSegmentByName oke:NaturalGasLiquids,oke:NaturalGasLiquidsRegulated█▆▅▂▃▁▂▁435400379303323289316294NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:CostOfRevenue ▁▃▂▃▄▅▆▅▅█▅▄▅▄▃▂▁▂▂▃▂▅▆▆▆1276179114141625195623182560217523683073222920912143202117511527119513331360160313432281258325712652NA301028952917NA24741980277131383061299232332812249123493304
 us-gaap:CostOfRevenue us-gaap:StatementBusinessSegments oke:NaturalGasGatheringAndProcessing▁▃▁▃▅▆▆▅▅█▆▅▅▄▃▂▂202330210309450563542442492672566488488428336299266NANA322330NANANANANANANANANANANANANANANANANANANANA
 us-gaap:CostOfRevenue us-gaap:StatementBusinessSegments oke:NaturalGasLiquids▁▃▂▃▄▅▆▅▅█▅▄▄▄▃▂▁12781776143816291846216725442183228129872136200320481945169415251156NANA15351228NANANANANANANANANANANANANANANANANANANANA
 us-gaap:CostOfRevenue us-gaap:StatementBusinessSegments oke:TotalSegments▁▃▂▃▄▅▆▅▅█▅▄▅▄▃▂▁14822108164919402299273630892629277936692713249925532388203718301427NANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:OperatingIncomeLoss ▁██████▇▇▇▆▆▆▆▆▆▆▅▅▅▄▆▆▅▆-83487482476468471495448419397351316314329329315311242284272196306291251294NA230128273NA242234325363248216330241186178337
us-gaap:InterestExpense █▇▇▅▅▅▆▄▅▆▆▅▅▅▅▅▅▄▄▃▂▁▁▁▂1401291291171151181211131151241261181161141181181181101061029686868894NA818180NA7171756873757969707576
us-gaap:IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest ▁██████▇▇▇▆▆▆▆▆▆▆▃▆▆▅▆▅▅▆-197418406410415389416369341316263219241249249232225-13202199133256152191219NA18780233NA207189293333194170282202150117NA
us-gaap:IncomeTaxExpenseBenefit ▁▄▄▄▄▄▅▄▄█▄▃▃▃▄▃▃▃▃▃▃▄▃▃▃-5598979877961028775251974354545552501238483756374214NA39167NA4240737133368455293197
us-gaap:ProfitLoss ▁████▇█▇▇▄▅▆▆▆▆▆▆▃▅▅▄▆▅▅▆▆▅▄▅▆▅▅▆▇▅▅▆▅▅▄▆-14132030931133729231328226664166175186194194179174-28160150952011141402061841477916519516414923326416013419914712086186
us-gaap:ComprehensiveIncomeNetOfTax ▁█▆▇▇▇█▇▇▅▆▅▅▅▅▅▅▄▅▅▅▅▅▅▅-26736722424525526233327731656160741029097617634818157656958102NA5412106NA3034150831759103646843167
us-gaap:NetIncomeLossAvailableToCommonStockholdersBasic ▁████▇█▇▇▄▅▄▄▄▄▄-142319308311336292312280264621657187909285NANANANANANANANANANANANANANANANANANANANANANANANANA
  2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
us-gaap:Assets ███▆▆▅▅▄▄▄▄▄▄▄▄▄▃▃▃▄▄▃▃▃▂▅▅▄▃▄▃▂▃▂▂▂▂▁▁▁21969218122133519751189341823117911169131643216845167641667216067161381598215822155011544615508156511553315304143121438413653177071761015842154461585515364138171425213696131711303613039124991192912119NA
 us-gaap:Assets us-gaap:StatementBusinessSegments oke:NaturalGasGatheringAndProcessing▇██▇▇▇▆▆▆▆▅▅▅▅▅▅▅▅▅▅▄▄▄▃▃▃▂▂▁▁637467956546634362086078581155855462549553855310529653205268522251965123520650074887472744154276404839493808334631463040NANANANANANANANANANANA
 us-gaap:Assets us-gaap:StatementBusinessSegments oke:NaturalGasLiquids██▇▆▆▅▅▄▄▄▄▄▄▄▄▄▃▃▃▃▃▃▃▃▂▂▂▁▁▁12682125511166210694102209663963288988370878285158168819483478257828980168017804181398106808273377363686169386610600856475620NANANANANANANANANANANA
 us-gaap:Assets us-gaap:StatementBusinessSegments oke:TotalSegments██▇▅▅▄▄▃▂▂▂▁▁▂▁▁▁▁211462144120292191221856817873175531655615893163321594115430154361561415438153671505914993NANANA14890NANANANANANANANANANANANANANANANANANANA
us-gaap:LiabilitiesAndStockholdersEquity ███▆▆▅▅▄▄▄▄▄▄▄▄▃▃▃▃▃▃▃▂▂▂▅▅▃▃▃▃▂▂▂▁▁▁▁2196921812213351975118934182311791116913164321684516764166721606716138159821582215501154461550815651155331530414312143841365317707176101584215446158551536413817142521369613171130361303912499NANANA
us-gaap:StockholdersEquity ▇▇▇██████▇▇▇▁▁▁▁▁▁▁▁▁▁▁▂▁▃▃▃▃▃▃▃▃▃▃▃▃▃5560622562186348644265796652666467015527535954072381882142372863354145175305926236565842337218920852134212920652089225622382185221724992448NANANA
 us-gaap:StockholdersEquity us-gaap:StatementEquityComponents us-gaap:AdditionalPaidInCapital▁▅▆▆▆▇██69897403744874957527761576627699NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
  2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
us-gaap:AssetsCurrent ▃▃▅▃▂▃▄▃▂▄▃▃▂▃▂▂▁▁▁▂▂▂▄▅▃▆█▄▄▇█▄▇▆▆▇▇▆14881470196714011342139818071433129017641518144713781429136912819919759521263132113071712205916562370288218891949276429561807260923182312252927952379NANANA
us-gaap:CashAndCashEquivalentsAtCarryingValue ▅▁▆▃▁▁▂▁▁▁▁▃▃▃▃▂▂▂▁▃▃▂▂▄▂▂▇▁▂▅█▂▇▁▂▄▇▁▁▂▂5312067327327118415173711332310248237180137973822623917215135821014977933143583978114781651484778703150103167
us-gaap:ReceivablesNetCurrent ▁▃▂▂▃▃▅▄▃▆▄▃▃▃▃▂▁▂▂▂▂▃▄▅▄█▅▅▆▇▄▃▅▇▅▅▆▇49783571866981281810859348441202939749734872737672521593586684628745971109788315491166115812611349984793115413391141112512801332NANANA
us-gaap:InventoryNet ▁▃▃▂▂▃▅▃▂▄▃▂▂▁▂▂▁▁▁▁▂▁▄▃▂▄▇▅▃▆▇▆▃▆▇▆▄█131304283184243296426285185342314200193140217245156128142150218134338335231417664434302517644561299549658574407708NANANA
us-gaap:OtherAssetsCurrent ▂▃▃▂▂▃▂▂▄▂▂▁▄▁▁▂▂▁▂▅▆▆▄▄▃▆▆▆▅▆██▅▇▇▆▄▅59827969561006157106536451108455058543976155175173119118102171160163154175220208155185202161106149NANANA
  2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
us-gaap:PropertyPlantAndEquipmentGross ██▇▇▆▆▅▅▄▄▄▄▄▄▄▄▄▄▄▃▃▃▂▂▂▄▄▃▃▃▂▂▂▂▁▁▁▁221362205120948198061888718030171201636315838155591536415241151541507814943148111467114530144571417513908136021217311737113131553614944140851356013088124041195311495111771070910350100369854NANANA
us-gaap:AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment ▇██▇▇▆▆▆▅▅▅▄▄▄▃▃▃▂▂▂▂▂▁▁▁▆▆▆▆▅▅▅▅▄▄▄▄▄35063702358534703369326431593059296028612785269426002507241623262234215621782099201719401931186618023238317331053039297429142855279427332690263725972541NANANA
us-gaap:PropertyPlantAndEquipmentNet ██▇▇▆▆▅▅▄▄▄▄▄▄▄▄▄▄▄▄▄▄▃▃▂▄▄▃▃▃▂▂▂▂▁▁▁▁186291834817362163361551814766139601330312878126981257812546125531257112526124841243712373122781207511891116621024298709510122971177010979105211011494909098870184448019771274387313NANANA
us-gaap:Goodwill ▁█527680NANANA681NANANA681NANANA525NANANA525NANANA525NANANA683NANANA591NANANA601NANANA602NANANA
 us-gaap:Goodwill oke:ReportableSegmentByName oke:NaturalGasLiquids▄▄371371NANANA371NANANA371NANANA268NANANA268NANANA268NANANA268NANANANANANANANANANANANANANANA
 us-gaap:Goodwill oke:ReportableSegmentByName oke:NaturalGasPipelines▄▄156156NANANA156NANANA156NANANA134NANANA134NANANA134NANANA134NANANANANANANANANANANANANANANA
us-gaap:IntangibleAssetsNetIncludingGoodwill ▁▄▄▄▄▄▄▅▅▅▅▅▅▅▅▅▅▅▅▅▅▅▅▅▅█▅▅78195796096396496797098799099399699910021005100810111014101710201023101110141017101810211182990992NA996NANANANANANANANANANANA
us-gaap:OtherAssetsNoncurrent ▃▂▂▂▁▁▂▂▁▂▂▂▂▂▁▁▁▁▁▁▂▂▂▂▂▆████▇▇▇▇▆▆▆▆259173174169158130191170159180182170176162121118112112115129167167184193202626765772760758701701720695575588595594NANANA
  2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
us-gaap:LiabilitiesCurrent ▁▄▃▃▃▄▅▆▄▆▆▇▆▇▅▅▃▃▄▆▆▅▃▃▄▆▆▆▅▇▅▅▆█▇▇▅█10912020156717371689210824502572205026672741286027312836234121881764163819602606254823921781185118912696262126482337281224392256260032462976284023013151NANANA
us-gaap:LongTermDebtCurrent ▁▁▁▃▃▅▅██▄▄▅▄▄▄▄▄▂▆▆▆▁▁▁▁▁▁▁▁▁▁▁▄▄▄▄▄▆7773073075075079329324324324944104104604604601106606606601010101010101010101112364364365368418643NANANA
us-gaap:AccountsPayableCurrent ▃▆▅▄▅▅▇▅▃▅▄▂▂▄▂▂▁▂▂▂▂▄▆▆▆█▇▆▆▇▆▄▅▇▆▆▅▆7421209112990710271118133910277731140922696703874711697522615620694721891122112711155150313821214120513331153911111013411241119411311215NANANA
us-gaap:TaxesPayableCurrent ▁▆█617579NANA61NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:OtherLiabilitiesCurrent ▁▅▂▄▂▃▃▃▂▃▂▃▂▂▃▃▂▂▂▄▃▅▂▃▂▇█▇▆▆▆▇▇▆▆▇█▇89285123252119211208184122179166167122166214202126132157256208285120190127401433388357369358396410345352392450424NANANA
  2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
us-gaap:LongTermDebt █▆▆▅▄▄▃▂▂▃▃▃▃▃▃▃▃▃▃▂▂▂▂▂▂▂▂▁142001250012500111001030094008800800080008500850083008300830088008800880084008400800080007200720072007200780078006500NA6500NANANANANANANANANANANA
us-gaap:LongTermDebtNoncurrent █▇▇▆▅▄▄▃▃▄▄▄▄▄▄▄▄▄▄▃▃▃▃▃▃▄▄▃▃▃▃▂▂▂▂▂▂▁1414612479124791075410004887383257091709180918092783579197919832083208320832377737291733971927194719671997754775765116513651565175224522545294532462249763686NANANA
us-gaap:DeferredTaxLiabilitiesNoncurrent ▂▃▂▂▂▂▁▁▁▁▁▁▇▇▇▆▆▆▆▆▆▆▆▅▅█▇▇▇▇▇▆▆▆▆▆▅▅442536418347270219132545352767316121623157315181484143614371451143013951303125311441938177617161678159215391457140814461386128812231171NANANA
us-gaap:OtherLiabilitiesNoncurrent ▆▅▆▅▄▄▃▃▃▂▂▂▂▂▂▂▂▁▂▂▂▂▁▁▁▄██▇▇▇▇▆▇▆▅▅▅631525626538501450350357366348339337334321296293273264278276290281229237229472763791712701692672638674592584575566NANANA
  2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
us-gaap:StockholdersEquity ▇▇▇██████▇▇▇▁▁▁▁▁▁▁▁▁▁▁▂▁▃▃▃▃▃▃▃▃▃▃▃▃▃5560622562186348644265796652666467015527535954072381882142372863354145175305926236565842337218920852134212920652089225622382185221724992448NANANA
 us-gaap:StockholdersEquity us-gaap:StatementEquityComponents us-gaap:AdditionalPaidInCapital▁▅▆▆▆▇██69897403744874957527761576627699NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:CommonStockValue ████████████▃▃▃▃▃▃▃▃▃▃▃▃▃▃▃▃▃▃▃▃▁▁▁▁▁▁44444444444422222222222222222222111111NANANA
us-gaap:RetainedEarningsAccumulatedDeficit ▁▁▁▁▁▁▁▁▁▁▁▁▂▁▁▁▁▁▁▂▂▂▂▂▂█████████▇-141000000000003000000023721381702252802020200820242097205920152017201919601903NA19011826NANANA
us-gaap:TreasuryStockValue ▁▁▂▂▂▃▃▃▃▃▃▃▄▄▄▄▄▄▅▅▅▅▅▆▆▇▇▇▇███▄▅▅792808812815820851856860863876880883887893897900908917929937942953956961965997100510071010103910481050903935947NA652663NANANA
us-gaap:AccumulatedOtherComprehensiveIncomeLossNetOfTax ▁▃▂▄▅▇▇▇▇▇▇▇▇▇▇▇██▇█▇▇████▆▆▆▆▆▆▇▆▇███-499-374-421-336-269-188-158-178-174-188-181-176-139-154-154-159-134-127-136-135-139-136-107-113-109-121-219-211-223-216-240-205-178-206-174-131-135-108NANANA
  2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
us-gaap:NetCashProvidedByUsedInOperatingActivities ▅▇▅▇▄█▆▆▆▅▄▅▄▅▅▄▃▄▅▄▁▅▄▁▆4226193586143536705135074953792933732694293903022293113612943941533445490NANANA471NANA2264263301542276477416832558
us-gaap:NetCashProvidedByUsedInInvestingActivities ▃▂▃▄▄▅▄▇▇▇▇███▇█▇▇▇▇▇▁▆▆▆-964-1120-1015-767-864-630-883-345-255-173-210-74-109-130-186-128-169-248-286-321-333-1374-371-381-439NANANA-494NANA-424-314-474-387-319-189-213249-103-66
us-gaap:NetCashProvidedByUsedInFinancingActivities █▂█▅▅▂▅▂▂▂▁▂▂▂▂▂▃▃▂▃▅█▂▅▃1052-1511056398527-112439-164-259-180-402-277-97-287-147-129-19-4-26213360980-1694849NANANA-416NANA-46859470-95-300380120-4716-354
  2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
us-gaap:NetCashProvidedByUsedInOperatingActivities ▅▇▅▇▄█▆▆▆▅▄▅▄▅▅▄▃▄▅▄▁▅▄▁▆4226193586143536705135074953792933732694293903022293113612943941533445490NANANA471NANA2264263301542276477416832558
us-gaap:ProfitLoss ▁████▇█▇▇▄▅▆▆▆▆▆▆▃▅▅▄▆▅▅▆▆▅▄▅▆▅▅▆▇▅▅▆▅▅▄▆-14132030931133729231328226664166175186194194179174-28160150952011141402061841477916519516414923326416013419914712086186
us-gaap:DepreciationDepletionAndAmortization █▇▇▆▆▆▅▅▅▅▅▅▄▄▄▄▄▄▃▃▃▂▂▂▁13212512111411411010710610410310210099999899949388868580747267NA949190NA8184837775787976777577
 us-gaap:DepreciationDepletionAndAmortization us-gaap:StatementBusinessSegments oke:NaturalGasGatheringAndProcessing██▇▇▇▆▆▆▆▆▆▆▅▅▅▆▅▄▄▃▃▃▃▂▂▂▂▁▁5857555352504948474746464445444641403735353431292827272523NANANANANANANANANANANANA
 us-gaap:DepreciationDepletionAndAmortization us-gaap:StatementBusinessSegments oke:NaturalGasLiquids█▇▇▆▆▆▅▅▅▅▅▅▅▅▅▅▅▅▅▅▅▄▃▃▂▂▂▂▁5752504646454342424241414141404040403939393431312724222219NANANANANANANANANANANANA
 us-gaap:DepreciationDepletionAndAmortization us-gaap:StatementBusinessSegments oke:NaturalGasPipelines█████▆▆█▆▆▄▄▄▄▄▃▃▁▁▁▁▁▁▁▁▁▁▁▃1414141414131314131312121212121111101010101010101010101011NANANANANANANANANANANANA
 us-gaap:DepreciationDepletionAndAmortization us-gaap:StatementBusinessSegments oke:TotalSegments█▇▆▅▅▄▃▃▃▃▂▂▂▂▂▂▁1311251201141131091061051031031011009898979893NANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:IncreaseDecreaseInOtherOperatingCapitalNet ▁▃▅▃█▄▅▄▆▅▅▄▆▄▄▄▅▅▅▄▆▄▆▄▅-129-45-3-51114-27-4-2552-52-3453-17-24-2127257-2852-2034-30-1NANANA-22NANA14244115-1136765-8-184158
us-gaap:IncreaseDecreaseInInventories ▂▆▇▄▄▃█▇▂▆▇▅▆▄▅▇▆▅▅▄▇▁▅▅▆-1732198-58-53-129140100-14928114653-77-288927-14-7-6884-2043-2363NANANA214NANA262-251-92-107-166301-5-160-175177
  2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
us-gaap:NetCashProvidedByUsedInInvestingActivities ▃▂▃▄▄▅▄▇▇▇▇███▇█▇▇▇▇▇▁▆▆▆-964-1120-1015-767-864-630-883-345-255-173-210-74-109-130-186-128-169-248-286-321-333-1374-371-381-439NANANA-494NANA-424-314-474-387-319-189-213249-103-66
us-gaap:PaymentsToAcquirePropertyPlantAndEquipment ▇█▇▆▇▆▅▃▂▂▁▁▁▁▂▁▂▂▂▂▃▄▃▃▃9491109101983088983169435026418113582112133158136196257300285343574382392429NA537559501NA45843234847333832919422617611168
 us-gaap:PaymentsToAcquirePropertyPlantAndEquipment us-gaap:StatementBusinessSegments oke:NaturalGasGatheringAndProcessing▄▅▅▄▅▅▄▂▂▂▂▁▂▂▂▂▃▄▅▄▅█▄▄▃▄▄▄▃18125224521321526121310811198853763849984141195231205255392214168122199204206163NANANANANANANANANANANANA
 us-gaap:PaymentsToAcquirePropertyPlantAndEquipment us-gaap:StatementBusinessSegments oke:NaturalGasLiquids▇█▇▆▆▅▅▃▂▁▁▁▁▁▁▁▁▁▁▁▂▂▂▃▃▄▃▃▃746827738591639519444216124542712202030203440525973160153210273354230269274NANANANANANANANANANANANA
 us-gaap:PaymentsToAcquirePropertyPlantAndEquipment us-gaap:StatementBusinessSegments oke:TotalSegments▇█▇▆▇▆▅▃▂▂▁▁▁▁▂▁▂9441101101182688382868934625617713176108129154134193NANANANANANANANANANANANANANANANANANANANANANANANA
  2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
us-gaap:NetCashProvidedByUsedInFinancingActivities █▂█▅▅▂▅▂▂▂▁▂▂▂▂▂▃▃▂▃▅█▂▅▃1052-1511056398527-112439-164-259-180-402-277-97-287-147-129-19-4-26213360980-1694849NANANA-416NANA-46859470-95-300380120-4716-354
us-gaap:ProceedsFromIssuanceOfLongTermDebt ▇▄█▅▇▅▆▄▄▄▆▄▄▄▄▄▆▄▅▄▅▄▁▄▆174801992750144255012450001190000001000049207980-119901199NANANA0NANA069900012950000
us-gaap:RepaymentsOfLongTermDebt ▁▁▅▁▅▁▄▁▅▁█▁▁▄▁▁▆▁▁▁▁▁▁▁▅521551150114261501198811451126521111111551NANANA1NANA3533393403228332533
us-gaap:PaymentsOfDividends ███▇▇▇▇▇▆▆▆▂▂▂▂▂▂▂▂▂▂▂▂▂▁38637836735735435133932731628528312912912912912912912812812612612212111683NANANA73NANA63635757555551484646
us-gaap:PaymentsOfDividends ███▇▇▇▇▇▆▆▆▂▂▂▂▂▂▂▂▂▂▂▂▂▁38637836735735435133932731628528312912912912912912912812812612612212111683NANANA73NANA63635757555551484646
  2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
us-gaap:RepaymentsOfLongTermDebt ▁▁▅▁▅▁▄▁▅▁█▁▁▄▁▁▆▁▁▁▁▁▁▁▅521551150114261501198811451126521111111551NANANA1NANA3533393403228332533

Common Stock Value

us-gaap:CommonStockValue



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312009-12-31
Value444444444444222222222222222222221111111
Percentage of CommonStockValue100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

Common Stock Par Or Stated Value Per Share

Shares Issued

us-gaap:StatementEquityComponents

us-gaap:SharesIssued

us-gaap:CommonStock



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312009-12-312008-12-312007-12-31
Value445445016445445445445445445445423415414245245245245245245245245245245245245245245245245245245245245122122122122122122122121121
Percentage of SharesIssued100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:PreferredStock



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302015-12-312014-12-31
Value0200000000000000000
Percentage of SharesIssued0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

Common Stock Shares Issued

us-gaap:CommonStockSharesIssued



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302011-12-312011-09-302011-06-302011-03-312010-12-312009-12-31
Value445445445445445445445445445423415414245245245245245245245245245245245245245245245245245245245245122122122122122122
Percentage of CommonStockSharesIssued100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Common Stock Shares Outstanding

us-gaap:CommonStockSharesOutstanding



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312009-12-31
Value413413413412412411411411411388381380210210210210210209209208208208208207207206206206206204204205103103102103107106105
Percentage of CommonStockSharesOutstanding100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Common Stock Shares Authorized

us-gaap:CommonStockSharesAuthorized



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312009-12-31
Value120012001200120012001200120012001200120012001200600600600600600600600600600600600600600600600600600600600600300300300300300300300
Percentage of CommonStockSharesAuthorized100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Weighted Average Number Of Diluted Shares Outstanding

us-gaap:WeightedAverageNumberOfDilutedSharesOutstanding



Period End2020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-312017-09-302017-06-302017-03-312016-09-302016-06-302016-03-312015-09-302015-06-302015-03-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-312012-09-302012-06-302012-03-312011-09-302011-06-302011-03-312010-09-302010-06-302010-03-31
Value41541541541541441441238321421321221221121021021021021021020920820920900000000
Percentage of WeightedAverageNumberOfDilutedSharesOutstanding100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Weighted Average Number Of Shares Outstanding Basic

us-gaap:WeightedAverageNumberOfSharesOutstandingBasic



Period End2020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-312017-09-302017-06-302017-03-312016-09-302016-06-302016-03-312015-09-302015-06-302015-03-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-312012-09-302012-06-302012-03-312011-09-302011-06-302011-03-312010-09-302010-06-302010-03-31
Value41441341341241241140938021121121121121021021020920920920920620620520500000000
Percentage of WeightedAverageNumberOfSharesOutstandingBasic100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Earnings Per Share Basic

us-gaap:EarningsPerShareBasic



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value-0.340.770.750.750.820.710.760.680.650.160.430.340.410.429999999999999940.440.410.40.12999999999999990.390.360.290.449999999999999960.310.290.450.30.00.550.320.291.181.10999999999999990.580.521.220.77999999999999980.520.391.46
Percentage of EarningsPerShareBasic100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Earnings Per Share Diluted

us-gaap:EarningsPerShareDiluted



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value-0.340.770.740.750.810.70.750.680.640.160.430.330.410.429999999999999940.430.40.40.119999999999999880.390.360.290.449999999999999960.310.290.450.30.00.540.310.291.161.080.570.511.190.76000000000000020.510.391.44
Percentage of EarningsPerShareDiluted100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Income Loss From Continuing Operations Per Basic Share

Income Loss From Continuing Operations Per Diluted Share

Revenue From Contract With Customer Excluding Assessed Tax

us-gaap:ProductOrService, us-gaap:StatementBusinessSegments

us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax

oke:GatheringandExchangeServicesRevenue, oke:NaturalGasGatheringAndProcessing



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value373842433940414238
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Revenues1.81.41.91.81.41.31.21.41.2
Percentage of Revenues oke:GatheringandExchangeServicesRevenue oke:NaturalGasGatheringAndProcessing0.00.00.00.00.00.00.00.00.0

oke:GatheringandExchangeServicesRevenue, oke:NaturalGasLiquids



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value120104105105981081169683
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax317.7273.8245.8243.2247.9265.1284.3225.4216.7
Percentage of Revenues5.63.94.64.33.53.53.43.32.7
Percentage of Revenues oke:GatheringandExchangeServicesRevenue oke:NaturalGasLiquids0.00.00.00.00.00.00.00.00.0

oke:GatheringandExchangeServicesRevenue, oke:TotalSegments



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value158142147149138149157139121
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax417.7373.8345.8343.2347.9365.1384.3325.4316.7
Percentage of Revenues7.45.46.56.15.04.84.74.73.9
Percentage of Revenues oke:GatheringandExchangeServicesRevenue oke:TotalSegments0.00.00.00.00.00.00.00.00.0

oke:NGLandCondensateSales, oke:NaturalGasGatheringAndProcessing



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value219334244312332413501447413
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax579.7874.7572.3718.4836.21012.71219.31046.31075.1
Percentage of Revenues10.312.610.812.712.013.214.815.113.3
Percentage of Revenues oke:NGLandCondensateSales oke:NaturalGasGatheringAndProcessing0.00.00.00.00.00.00.00.00.0

oke:NGLandCondensateSales, oke:NaturalGasLiquids



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value159620841746192121582435286124692552
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax4208.85453.24081.44413.75430.35960.66963.15769.86642.8
Percentage of Revenues74.778.377.278.277.677.784.383.482.3
Percentage of Revenues oke:NGLandCondensateSales oke:NaturalGasLiquids0.00.00.00.00.00.00.00.00.0

oke:NGLandCondensateSales, oke:TotalSegments



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value181624181991223424902849336329172965
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax4788.56327.94653.75132.16266.56973.38182.46816.17717.9
Percentage of Revenues85.090.888.090.989.690.899.198.595.6
Percentage of Revenues oke:NGLandCondensateSales oke:TotalSegments0.00.00.00.00.00.00.00.00.0

oke:ResidueNaturalGasSales, oke:NaturalGasGatheringAndProcessing



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value189240185221319375245208254
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax498.3629.1433.0508.4802.8917.9597.2487.4663.6
Percentage of Revenues8.89.08.29.011.512.07.27.08.2
Percentage of Revenues oke:ResidueNaturalGasSales oke:NaturalGasGatheringAndProcessing0.00.00.00.00.00.00.00.00.0

oke:ResidueNaturalGasSales, oke:NaturalGasPipelines



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value200003004
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax5.40.00.50.12.49.61.90.412.8
Percentage of Revenues0.10.00.00.00.00.10.00.00.2
Percentage of Revenues oke:ResidueNaturalGasSales oke:NaturalGasPipelines0.00.00.00.00.00.00.00.00.0

oke:ResidueNaturalGasSales, oke:TotalSegments



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value191240185221320378246208259
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax503.7629.1433.5508.5805.2927.5599.1487.8676.4
Percentage of Revenues8.99.08.29.011.512.17.37.18.4
Percentage of Revenues oke:ResidueNaturalGasSales oke:TotalSegments0.00.00.00.00.00.00.00.00.0

oke:TransportationandStorageRevenue, oke:NaturalGasLiquids



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value505646425255454553
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax133.8146.8108.498.0131.7135.3110.1105.2139.2
Percentage of Revenues2.42.12.11.71.91.81.31.51.7
Percentage of Revenues oke:TransportationandStorageRevenue oke:NaturalGasLiquids0.00.00.00.00.00.00.00.00.0

oke:TransportationandStorageRevenue, oke:NaturalGasPipelines



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value118148108105103104989398
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax312.0389.0253.3242.8260.4255.4238.5217.9255.9
Percentage of Revenues5.55.64.84.33.73.32.93.23.2
Percentage of Revenues oke:TransportationandStorageRevenue oke:NaturalGasPipelines0.00.00.00.00.00.00.00.00.0

oke:TransportationandStorageRevenue, oke:TotalSegments



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value169204154148155159143138151
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax445.8535.8361.7340.8392.0390.7348.6323.1395.1
Percentage of Revenues7.97.76.86.05.65.14.24.74.9
Percentage of Revenues oke:TransportationandStorageRevenue oke:TotalSegments0.00.00.00.00.00.00.00.00.0

Revenues

us-gaap:Revenues



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value21362663226324572779313633932960310237922906272527492654235721341774193018982128180528443120306631634140357133493541365930282529341440713595351438663280294228073923
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:MajorCustomers

oke:NoncustomerDomain



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value80989182215-17-5-9
Percentage of Revenues3.80.43.90.80.80.5-0.5-0.2-0.3
Percentage of Revenues3.80.43.90.80.80.5-0.5-0.2-0.3
Percentage of Revenues oke:NoncustomerDomain100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:MajorCustomers, us-gaap:StatementBusinessSegments, oke:RegulatedSegmentByName

us-gaap:OperatingSegments, oke:NaturalGasLiquids, oke:NaturalGasLiquidsRegulated



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-30
Value378347315267270315276255
Percentage of Revenues17.713.013.910.99.710.08.18.6
Percentage of Revenues17.713.013.910.99.710.08.18.6
Percentage of Revenues us-gaap:OperatingSegments oke:NaturalGasLiquids oke:NaturalGasLiquidsRegulated100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ProductOrService

oke:CommoditySales



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-30
Value18082348194721462472281630832675
Percentage of Revenues84.688.286.187.489.089.890.990.4
Percentage of Revenues84.688.286.187.489.089.890.990.4
Percentage of Revenues oke:CommoditySales100.0100.0100.0100.0100.0100.0100.0100.0

oke:GatheringandExchangeServicesRevenue



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value158142147149138149157139121
Percentage of Revenues7.45.46.56.15.04.84.74.73.9
Percentage of Revenues7.45.46.56.15.04.84.74.73.9
Percentage of Revenues oke:GatheringandExchangeServicesRevenue100.0100.0100.0100.0100.0100.0100.0100.0100.0

oke:NGLandCondensateSales



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value161721071761192321522439283624682557
Percentage of Revenues75.779.177.878.377.477.883.683.482.4
Percentage of Revenues75.779.177.878.377.477.883.683.482.4
Percentage of Revenues oke:NGLandCondensateSales100.0100.0100.0100.0100.0100.0100.0100.0100.0

oke:Other



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value5-2316171614121011
Percentage of Revenues0.3-0.90.70.70.60.50.40.40.4
Percentage of Revenues0.3-0.90.70.70.60.50.40.40.4
Percentage of Revenues oke:Other100.0100.0100.0100.0100.0100.0100.0100.0100.0

oke:ResidueNaturalGasSales



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value190239184221320376246205262
Percentage of Revenues8.99.08.29.011.512.07.37.08.5
Percentage of Revenues8.99.08.29.011.512.07.37.08.5
Percentage of Revenues oke:ResidueNaturalGasSales100.0100.0100.0100.0100.0100.0100.0100.0100.0

oke:Services



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-30
Value328315315310306319310285
Percentage of Revenues15.411.813.912.611.010.29.19.6
Percentage of Revenues15.411.813.912.611.010.29.19.6
Percentage of Revenues oke:Services100.0100.0100.0100.0100.0100.0100.0100.0

oke:TransportationandStorageRevenue



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value165196152145153156140135149
Percentage of Revenues7.77.46.75.95.55.04.24.64.8
Percentage of Revenues7.77.46.75.95.55.04.24.64.8
Percentage of Revenues oke:TransportationandStorageRevenue100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ProductOrService, us-gaap:StatementBusinessSegments

oke:GatheringandExchangeServicesRevenue, us-gaap:IntersegmentElimination



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value0.00.00.00.00.00.00.00.0-21000.0
Percentage of Revenues0.00.00.00.00.00.00.00.0-0.0
Percentage of Revenues0.00.00.00.00.00.00.00.0-0.0
Percentage of Revenues oke:GatheringandExchangeServicesRevenue us-gaap:IntersegmentElimination0.00.00.00.00.00.00.00.0100.0

oke:NGLandCondensateSales, us-gaap:IntersegmentElimination



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value-199-311-230-310-338-410-526-448-408
Percentage of Revenues-9.3-11.7-10.2-12.6-12.2-13.1-15.5-15.2-13.2
Percentage of Revenues-9.3-11.7-10.2-12.6-12.2-13.1-15.5-15.2-13.2
Percentage of Revenues oke:NGLandCondensateSales us-gaap:IntersegmentElimination100.0100.0100.0100.0100.0100.0100.0100.0100.0

oke:Other, oke:NaturalGasGatheringAndProcessing



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value323434311
Percentage of Revenues0.10.10.10.20.10.10.10.10.0
Percentage of Revenues0.10.10.10.20.10.10.10.10.0
Percentage of Revenues oke:Other oke:NaturalGasGatheringAndProcessing100.0100.0100.0100.0100.0100.0100.0100.0100.0

oke:Other, oke:NaturalGasLiquids



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value222222222
Percentage of Revenues0.10.10.10.10.10.10.10.10.1
Percentage of Revenues0.10.10.10.10.10.10.10.10.1
Percentage of Revenues oke:Other oke:NaturalGasLiquids100.0100.0100.0100.0100.0100.0100.0100.0100.0

oke:Other, oke:NaturalGasPipelines



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value0-321211118666
Percentage of Revenues0.0-1.20.60.50.40.30.20.20.2
Percentage of Revenues0.0-1.20.60.50.40.30.20.20.2
Percentage of Revenues oke:Other oke:NaturalGasPipelines100.0100.0100.0100.0100.0100.0100.0100.0100.0

oke:Other, oke:TotalSegments



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value6-2718181815121011
Percentage of Revenues0.3-1.00.80.80.60.50.40.40.4
Percentage of Revenues0.3-1.00.80.80.60.50.40.40.4
Percentage of Revenues oke:Other oke:TotalSegments100.0100.0100.0100.0100.0100.0100.0100.0100.0

oke:Other, us-gaap:IntersegmentElimination



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value03-1-1-1-1000
Percentage of Revenues-0.00.1-0.1-0.1-0.1-0.0-0.0-0.00.0
Percentage of Revenues-0.00.1-0.1-0.1-0.1-0.0-0.0-0.00.0
Percentage of Revenues oke:Other us-gaap:IntersegmentElimination100.0100.0100.0100.0100.0100.0100.0100.0100.0

oke:ResidueNaturalGasSales, us-gaap:IntersegmentElimination



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value-10000-20-32
Percentage of Revenues-0.0-0.0-0.00.00.0-0.10.0-0.10.1
Percentage of Revenues-0.0-0.0-0.00.00.0-0.10.0-0.10.1
Percentage of Revenues oke:ResidueNaturalGasSales us-gaap:IntersegmentElimination100.0100.0100.00.00.0100.00.0100.0100.0

oke:TransportationandStorageRevenue, us-gaap:IntersegmentElimination



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value-3-8-2-2-2-2-2-2-2
Percentage of Revenues-0.2-0.3-0.1-0.1-0.1-0.1-0.1-0.1-0.1
Percentage of Revenues-0.2-0.3-0.1-0.1-0.1-0.1-0.1-0.1-0.1
Percentage of Revenues oke:TransportationandStorageRevenue us-gaap:IntersegmentElimination100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:StatementBusinessSegments

oke:NaturalGasGatheringAndProcessing



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-31
Value449615476582694834791700707896782685661630512476432487434460455704777723762598533482437
Percentage of Revenues21.123.121.023.725.026.623.323.722.823.626.925.224.023.821.722.324.325.222.921.625.224.824.923.624.114.514.914.412.4
Percentage of Revenues21.123.121.023.725.026.623.323.722.823.626.925.224.023.821.722.324.325.222.921.625.224.824.923.624.114.514.914.412.4
Percentage of Revenues oke:NaturalGasGatheringAndProcessing100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

oke:NaturalGasLiquids



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-31
Value17702247190020722311260130262613269233822501234923912277203918711487162316111848149624332734266527113147287424912264
Percentage of Revenues82.984.484.084.383.182.989.288.386.889.286.186.287.085.886.587.783.884.184.986.982.985.687.686.985.776.080.574.463.9
Percentage of Revenues82.984.484.084.383.182.989.288.386.889.286.186.287.085.886.587.783.884.184.986.982.985.687.686.985.776.080.574.463.9
Percentage of Revenues oke:NaturalGasLiquids100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

oke:NaturalGasPipelines



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-31
Value12011612111711611610599109108106971061139288858582808384798110488757586
Percentage of Revenues5.74.45.44.84.23.73.13.43.52.93.73.63.94.33.94.14.84.44.43.84.63.02.52.73.32.12.12.22.4
Percentage of Revenues5.74.45.44.84.23.73.13.43.52.93.73.63.94.33.94.14.84.44.43.84.63.02.52.73.32.12.12.22.4
Percentage of Revenues oke:NaturalGasPipelines100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

oke:TotalSegments



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-31
Value23412980249827723122355339223414351043873391313331603020264324362005
Percentage of Revenues109.6111.9110.4112.8112.3113.3115.6115.3113.2115.7116.7115.0114.9113.8112.1114.2113.0
Percentage of Revenues109.6111.9110.4112.8112.3113.3115.6115.3113.2115.7116.7115.0114.9113.8112.1114.2113.0
Percentage of Revenues oke:TotalSegments100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:IntersegmentElimination



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-312012-09-302012-06-302012-03-31
Value-204-316-235-314-342-416-528-454-408-595-484-407-410-366-285-302-230-265-229-260-229-377-471-403-415-114-141-159-87-85-158
Percentage of Revenues-9.6-11.9-10.4-12.8-12.3-13.3-15.6-15.3-13.2-15.7-16.7-15.0-14.9-13.8-12.1-14.2-13.0-13.7-12.1-12.3-12.7-13.3-15.1-13.2-13.1-3.2-4.2-4.5-2.9-3.4-4.6
Percentage of Revenues-9.6-11.9-10.4-12.8-12.3-13.3-15.6-15.3-13.2-15.7-16.7-15.0-14.9-13.8-12.1-14.2-13.0-13.7-12.1-12.3-12.7-13.3-15.1-13.2-13.1-3.2-4.2-4.5-2.9-3.4-4.6
Percentage of Revenues us-gaap:IntersegmentElimination100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:StatementBusinessSegments, oke:IntersegmentRevenuesbyName

oke:NaturalGasGatheringAndProcessing, oke:NaturalGasGatheringandProcessingIntersegment



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-30
Value213302244317335400519448
Percentage of Revenues10.011.310.812.912.112.815.315.1
Percentage of Revenues10.011.310.812.912.112.815.315.1
Percentage of Revenues oke:NaturalGasGatheringAndProcessing oke:NaturalGasGatheringandProcessingIntersegment100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:StatementBusinessSegments, oke:RegulatedSegmentByName

oke:NaturalGasLiquids, oke:NaturalGasLiquidsRegulated



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-30
Value435400379303323289316294
Percentage of Revenues20.415.016.812.311.69.29.39.9
Percentage of Revenues20.415.016.812.311.69.29.39.9
Percentage of Revenues oke:NaturalGasLiquids oke:NaturalGasLiquidsRegulated100.0100.0100.0100.0100.0100.0100.0100.0

oke:NaturalGasPipelines, oke:NaturalGasPipelinesRegulated



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-30
Value7370727270686564
Percentage of Revenues3.52.73.22.92.52.21.92.2
Percentage of Revenues3.52.73.22.92.52.21.92.2
Percentage of Revenues oke:NaturalGasPipelines oke:NaturalGasPipelinesRegulated100.0100.0100.0100.0100.0100.0100.0100.0

Sales Revenue Net

Sales Revenue Goods Net

Cost Of Revenue

us-gaap:CostOfRevenue



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value127617911414162519562318256021752368307322292091214320211751152711951333136016031343228125832571265230102895291724741980277131383061299232332812249123493304
Percentage of CostOfRevenue100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Revenues59.867.362.566.270.473.975.573.576.381.176.776.778.076.274.371.667.469.071.775.374.480.282.883.883.984.386.582.481.778.381.277.185.185.283.685.784.783.784.2

us-gaap:StatementBusinessSegments

oke:NaturalGasGatheringAndProcessing



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-06-302015-03-31
Value202330210309450563542442492672566488488428336299266322330
Percentage of CostOfRevenue15.818.514.919.123.024.321.220.420.821.925.423.422.821.219.219.622.320.124.6
Percentage of Revenues9.512.49.312.616.218.016.015.015.917.719.517.917.816.214.314.115.015.218.3
Percentage of Revenues oke:NaturalGasGatheringAndProcessing44.953.844.353.264.967.568.663.269.675.072.471.373.968.065.762.961.670.272.6

oke:NaturalGasLiquids



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-06-302015-03-31
Value1278177614381629184621672544218322812987213620032048194516941525115615351228
Percentage of CostOfRevenue100.199.2101.7100.294.493.599.4100.496.397.295.895.895.696.296.799.996.895.891.4
Percentage of Revenues59.866.763.566.366.469.175.073.873.578.873.573.574.573.371.971.565.272.268.1
Percentage of Revenues oke:NaturalGasLiquids72.279.075.778.679.983.384.183.584.788.385.485.385.685.483.181.577.883.182.1

oke:NaturalGasPipelines



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-06-302015-03-31
Value10011522591061614653614
Percentage of CostOfRevenue0.10.00.00.10.10.20.10.10.20.30.50.30.80.70.40.30.30.41.1
Percentage of Revenues0.10.00.00.10.10.20.10.10.20.20.40.20.60.60.30.20.20.30.8
Percentage of Revenues oke:NaturalGasPipelines1.30.70.31.41.54.72.32.65.08.710.06.915.512.97.55.84.67.517.3

oke:TotalSegments



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-31
Value14822108164919402299273630892629277936692713249925532388203718301427
Percentage of CostOfRevenue116.1117.7116.6119.4117.5118.0120.7120.8117.4119.4121.7119.5119.1118.2116.3119.8119.4
Percentage of Revenues69.479.172.979.082.787.291.088.889.696.893.491.792.990.086.485.880.4
Percentage of Revenues oke:TotalSegments63.370.766.070.073.677.078.877.079.283.680.079.880.879.177.175.171.2

us-gaap:IntersegmentElimination



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-31
Value-205-316-234-315-342-418-528-453-411-595-484-408-409-367-285-303-231-265-230-261-230
Percentage of CostOfRevenue-16.1-17.7-16.6-19.4-17.5-18.0-20.7-20.8-17.4-19.4-21.7-19.5-19.1-18.2-16.3-19.8-19.4-19.9-16.9-16.3-17.1
Percentage of Revenues-9.6-11.9-10.4-12.8-12.3-13.3-15.6-15.3-13.3-15.7-16.7-15.0-14.9-13.8-12.1-14.2-13.0-13.7-12.1-12.3-12.8
Percentage of Revenues us-gaap:IntersegmentElimination100.4100.199.9100.2100.1100.4100.099.8100.7100.099.9100.299.8100.2100.1100.1100.2100.1100.1100.1100.2

us-gaap:StatementBusinessSegments, oke:RegulatedSegmentByName

oke:NaturalGasLiquids, oke:NaturalGasLiquidsRegulated



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-30
Value120131129116118126132124
Percentage of CostOfRevenue9.47.49.27.26.15.55.25.7
Percentage of Revenues5.65.05.74.84.34.03.94.2
Percentage of Revenues oke:NaturalGasLiquids oke:NaturalGasLiquidsRegulated27.733.034.138.536.743.742.042.1

oke:NaturalGasPipelines, oke:NaturalGasPipelinesRegulated



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-30
Value65535555
Percentage of CostOfRevenue0.50.30.40.20.30.20.20.3
Percentage of Revenues0.30.20.20.20.20.20.20.2
Percentage of Revenues oke:NaturalGasPipelines oke:NaturalGasPipelinesRegulated8.37.97.15.18.08.28.39.0

Gross Profit

Operating Expenses

Operating Income Loss

us-gaap:OperatingIncomeLoss



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value-83487482476468471495448419397351316314329329315311242284272196306291251294230128273242234325363248216330241186178337
Percentage of OperatingIncomeLoss100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Revenues-3.918.321.319.416.915.014.615.113.510.512.111.611.412.414.014.817.612.515.012.810.910.89.38.29.36.43.87.78.09.39.58.96.96.28.57.36.46.48.6

Interest Expense

us-gaap:InterestExpense



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value14012912911711511812111311512412611811611411811811811010610296868688948181807171756873757969707576
Percentage of InterestExpense100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Revenues6.64.95.74.84.23.83.63.83.73.34.44.34.24.35.05.66.75.75.64.85.43.02.82.93.02.32.42.32.42.82.21.72.12.12.12.12.42.72.0

Other Nonoperating Income Expense

Income Loss From Continuing Operations

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

us-gaap:IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-30
Value-197418406410415389416369341316263219241249249232225-1320219913325615219121918780233207189293333194170282202150117
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 Revenues-9.215.718.016.714.912.412.312.511.08.39.18.18.89.410.610.912.7-0.710.79.47.49.04.96.26.95.22.46.66.97.58.68.25.44.97.36.25.14.2

Income Loss From Continuing Operations Including Portion Attributable To Noncontrolling Interest

Income Tax Expense Benefit

us-gaap:IncomeTaxExpenseBenefit



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value-5598979877961028775251974354545552501238483756374214391674240737133368455293197
Percentage of IncomeTaxExpenseBenefit100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Revenues-2.63.74.34.02.83.13.03.02.46.63.31.62.02.12.32.52.80.72.02.32.12.01.21.40.51.10.01.91.41.62.21.70.91.02.21.71.01.12.5

Profit Loss

us-gaap:ProfitLoss



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value-14132030931133729231328226664166175186194194179174-28160150952011141402061841477916519516414923326416013419914712086186
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-6.612.013.712.712.19.39.29.58.61.75.76.56.87.38.28.49.9-1.58.57.15.37.13.74.66.54.44.12.44.75.45.45.96.86.54.53.85.24.54.13.14.8

us-gaap:StatementEquityComponents

us-gaap:RetainedEarnings



Period End2020-03-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-03-312012-06-302012-03-312011-12-312011-09-302011-06-302011-03-31
Value-141309311337292313281264631657187909285832582766094646193112601221156055130
Percentage of ProfitLoss100.0100.0100.0100.0100.099.899.699.497.399.540.746.946.547.447.847.7-90.451.150.763.546.956.443.845.367.940.952.643.437.540.965.3
Percentage of Revenues-6.613.712.712.19.39.29.58.51.75.72.63.23.43.94.04.71.34.33.63.43.32.12.03.03.22.43.62.81.71.63.4
Percentage of Revenues us-gaap:RetainedEarnings0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

Comprehensive Income Net Of Tax

us-gaap:ComprehensiveIncomeNetOfTax



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value-2673672242452552623332773165616074102909761763481815765695810254121063034150831759103646843167
Percentage of ComprehensiveIncomeNetOfTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Revenues-12.513.89.910.09.28.49.89.410.21.55.52.73.73.44.12.94.31.84.33.83.22.32.21.93.21.50.43.01.01.44.42.00.51.72.72.02.31.64.3

Comprehensive Income Net Of Tax Attributable To Noncontrolling Interest

Comprehensive Income Net Of Tax Including Portion Attributable To Noncontrolling Interest

Net Income Loss

Net Income Loss Available To Common Stockholders Basic

us-gaap:NetIncomeLossAvailableToCommonStockholdersBasic



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-30
Value-142319308311336292312280264621657187909285
Percentage of NetIncomeLossAvailableToCommonStockholdersBasic100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Revenues-6.712.013.612.712.19.39.29.58.51.75.72.63.23.43.94.0

Net Income Loss Attributable To Noncontrolling Interest

Assets

us-gaap:Assets



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302009-12-31
Value2196921812213351975118934182311791116913164321684516764166721606716138159821582215501154461550815651155331530414312143841365317707176101584215446158551536413817142521369613171130361303912499119291211912827
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:StatementBusinessSegments

oke:NaturalGasGatheringAndProcessing



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-31
Value637467956546634362086078581155855462549553855310529653205268522251965123520650074887472744154276404839493808334631463040
Percentage of Assets29.031.230.732.132.833.332.433.033.232.632.131.933.033.033.033.033.533.233.632.031.530.930.929.729.722.321.621.120.419.2
Percentage of Assets29.031.230.732.132.833.332.433.033.232.632.131.933.033.033.033.033.533.233.632.031.530.930.929.729.722.321.621.120.419.2
Percentage of Assets oke:NaturalGasGatheringAndProcessing100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

oke:NaturalGasLiquids



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-31
Value12682125511166210694102209663963288988370878285158168819483478257828980168017804181398106808273377363686169386610600856475620
Percentage of Assets57.757.554.754.154.053.053.852.650.952.150.849.051.051.751.752.451.751.951.952.052.252.851.351.250.339.237.537.936.635.4
Percentage of Assets57.757.554.754.154.053.053.852.650.952.150.849.051.051.751.752.451.751.951.952.052.252.851.351.250.339.237.537.936.635.4
Percentage of Assets oke:NaturalGasLiquids100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

oke:NaturalGasPipelines



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-31
Value208920942083208321382131210920732060205520401951194519461912185618471844183718411807182318321852184818171786179217991812
Percentage of Assets9.59.69.810.611.311.711.812.312.512.212.211.712.112.112.011.711.911.911.911.811.611.912.812.913.510.310.111.311.611.4
Percentage of Assets9.59.69.810.611.311.711.812.312.512.212.211.712.112.112.011.711.911.911.911.811.611.912.812.913.510.310.111.311.611.4
Percentage of Assets oke:NaturalGasPipelines100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

oke:TotalSegments



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312014-12-31
Value21146214412029219122185681787317553165561589316332159411543015436156141543815367150591499314890
Percentage of Assets96.398.395.196.898.198.098.097.996.797.095.192.696.196.896.697.197.297.197.3
Percentage of Assets96.398.395.196.898.198.098.097.996.797.095.192.696.196.896.697.197.297.197.3
Percentage of Assets oke:TotalSegments100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:IntersegmentElimination



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-31
Value82237010436293663573583565385138231241630523543455441460422662730670726891894639786804892867862737868794
Percentage of Assets3.71.74.93.21.92.02.02.13.33.04.97.43.93.23.42.92.83.02.74.24.74.45.16.26.63.64.55.15.85.55.65.36.15.8
Percentage of Assets3.71.74.93.21.92.02.02.13.33.04.97.43.93.23.42.92.83.02.74.24.74.45.16.26.63.64.55.15.85.55.65.36.15.8
Percentage of Assets us-gaap:IntersegmentElimination100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Liabilities

Liabilities And Stockholders Equity

us-gaap:LiabilitiesAndStockholdersEquity



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312009-12-31
Value219692181221335197511893418231179111691316432168451676416672160671613815982158221550115446155081565115533153041431214384136531770717610158421544615855153641381714252136961317113036130391249912827
Percentage of LiabilitiesAndStockholdersEquity100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Stockholders Equity

us-gaap:StockholdersEquity



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312009-12-31
Value55606225621863486442657966526664670155275359540723818821423728633541451753059262365658423372189208521342129206520892256223821852217249924482207
Percentage of StockholdersEquity100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets25.328.529.132.134.036.137.139.440.832.832.032.41.51.21.31.51.92.22.73.33.43.94.44.64.313.212.413.213.813.413.415.115.816.316.617.019.219.617.2

us-gaap:StatementEquityComponents

us-gaap:AccumulatedOtherComprehensiveIncome



Period End2020-03-312019-12-312019-06-302019-03-312018-12-312018-09-302018-06-30
Value-499-374-336-269-188-158-178
Percentage of StockholdersEquity-9.0-6.0-5.3-4.2-2.9-2.4-2.7
Percentage of Assets-2.3-1.7-1.7-1.4-1.0-0.9-1.1
Percentage of Assets us-gaap:AccumulatedOtherComprehensiveIncome0.00.00.00.00.00.00.0

us-gaap:AdditionalPaidInCapital



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-30
Value69897403744874957527761576627699
Percentage of StockholdersEquity125.7118.9119.8118.1116.9115.7115.2115.5
Percentage of Assets31.833.934.937.939.841.842.845.5
Percentage of Assets us-gaap:AdditionalPaidInCapital0.00.00.00.00.00.00.00.0

us-gaap:RetainedEarnings



Period End2020-03-312019-12-312019-06-302019-03-312018-12-312018-09-302018-06-30
Value-141000000
Percentage of StockholdersEquity-2.60.00.00.00.00.00.0
Percentage of Assets-0.60.00.00.00.00.00.0
Percentage of Assets us-gaap:RetainedEarnings0.00.00.00.00.00.00.0

us-gaap:TreasuryStock



Period End2020-03-312019-12-312019-06-302019-03-312018-12-312018-09-302018-06-30
Value-792-808-815-820-851-856-860
Percentage of StockholdersEquity-14.2-13.0-12.8-12.7-12.9-12.9-12.9
Percentage of Assets-3.6-3.7-4.1-4.3-4.7-4.8-5.1
Percentage of Assets us-gaap:TreasuryStock0.00.00.00.00.00.00.0

Assets Current

us-gaap:AssetsCurrent



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312009-12-31
Value148814701967140113421398180714331290176415181447137814291369128199197595212631321130717122059165623702882188919492764295618072609231823122529279523792588
Percentage of AssetsCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets6.86.79.27.17.17.710.18.57.910.59.18.78.68.98.68.16.46.36.18.18.58.512.014.312.113.416.411.912.617.419.213.118.316.917.619.421.419.020.2

Cash And Cash Equivalents At Carrying Value

us-gaap:CashAndCashEquivalentsAtCarryingValue



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312008-12-312007-12-31
Value53120673273271184151737113323102482371801379738226239172151358210149779331435839781147816514847787031501031672951019
Percentage of CashAndCashEquivalentsAtCarryingValue100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets2.40.13.21.40.10.10.50.10.10.20.12.01.91.51.51.10.90.60.21.41.51.11.12.51.50.84.40.20.93.76.40.85.50.51.13.76.70.20.40.90.00.20.00.0

Receivables Net Current

us-gaap:ReceivablesNetCurrent



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312009-12-31
Value497835718669812818108593484412029397497348727376725215935866846287459711097883154911661158126113499847931154133911411125128013321437
Percentage of ReceivablesNetCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets2.33.83.43.44.34.56.15.55.17.15.64.54.65.44.64.23.43.83.84.44.04.96.87.66.58.86.67.38.28.56.45.78.19.88.78.69.810.711.2

Inventory Net

us-gaap:InventoryNet



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312009-12-31
Value131304283184243296426285185342314200193140217245156128142150218134338335231417664434302517644561299549658574407708583
Percentage of InventoryNet100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets0.61.41.30.91.31.62.41.71.12.01.91.21.20.91.41.61.00.80.91.01.40.92.42.31.72.43.82.72.03.34.24.12.14.05.04.43.15.74.5

Other Assets Current

us-gaap:OtherAssetsCurrent



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312009-12-31
Value59827969561006157106536451108455058543976155175173119118102171160163154175220208155185202161106149238
Percentage of OtherAssetsCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets0.30.40.40.40.30.60.30.30.60.30.40.30.70.30.30.40.30.30.51.01.11.10.80.80.71.00.91.01.01.11.41.51.11.41.51.20.81.21.9

Property Plant And Equipment Gross

us-gaap:PropertyPlantAndEquipmentGross



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312009-12-31
Value22136220512094819806188871803017120163631583815559153641524115154150781494314811146711453014457141751390813602121731173711313155361494414085135601308812404119531149511177107091035010036985410145
Percentage of PropertyPlantAndEquipmentGross100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets100.8101.198.2100.399.898.995.696.796.492.491.691.494.393.493.593.694.794.193.290.689.588.985.181.682.987.784.988.987.882.680.786.580.781.681.379.477.078.879.1

Accumulated Depreciation Depletion And Amortization Property Plant And Equipment

us-gaap:AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312009-12-31
Value350637023585347033693264315930592960286127852694260025072416232622342156217820992017194019311866180232383173310530392974291428552794273326902637259725412352
Percentage of AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets16.017.016.817.617.817.917.618.118.017.016.616.216.215.515.114.714.414.014.013.413.012.713.513.013.218.318.019.619.718.819.020.719.620.020.420.219.920.318.3

Property Plant And Equipment Net

us-gaap:PropertyPlantAndEquipmentNet



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312009-12-31
Value1862918348173621633615518147661396013303128781269812578125461255312571125261248412437123731227812075118911166210242987095101229711770109791052110114949090988701844480197712743873137793
Percentage of PropertyPlantAndEquipmentNet100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets84.884.181.482.782.081.077.978.778.475.475.075.378.177.978.478.980.280.179.277.276.676.271.668.669.769.466.869.368.163.861.865.861.161.760.959.257.058.560.8

Goodwill

us-gaap:Goodwill



Period End2020-03-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-312010-12-31
Value527680681681525525525683591601602
Percentage of Goodwill100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets2.43.13.74.03.33.43.43.93.74.44.8

oke:ReportableSegmentByName

oke:NaturalGasGatheringAndProcessing



Period End2020-03-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-31
Value0153153153122122122122
Percentage of Goodwill0.022.522.522.523.323.323.317.9
Percentage of Assets0.00.70.80.90.80.80.80.7
Percentage of Assets oke:NaturalGasGatheringAndProcessing0.00.00.00.00.00.00.00.0

oke:NaturalGasLiquids



Period End2020-03-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-31
Value371371371371268268268268
Percentage of Goodwill70.454.554.554.551.151.151.139.3
Percentage of Assets1.71.72.02.21.71.71.81.5
Percentage of Assets oke:NaturalGasLiquids0.00.00.00.00.00.00.00.0

oke:NaturalGasPipelines



Period End2020-03-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-31
Value156156156156134134134134
Percentage of Goodwill29.623.023.023.025.625.625.619.7
Percentage of Assets0.70.70.90.90.80.90.90.8
Percentage of Assets oke:NaturalGasPipelines0.00.00.00.00.00.00.00.0

Intangible Assets Net Excluding Goodwill

Finite Lived Intangible Assets Net

Intangible Assets Net Including Goodwill

us-gaap:IntangibleAssetsNetIncludingGoodwill



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302012-12-31
Value78195796096396496797098799099399699910021005100810111014101710201023101110141017101810211182990992996
Percentage of IntangibleAssetsNetIncludingGoodwill100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets3.64.44.54.95.15.35.45.86.05.95.96.06.26.26.36.46.56.66.66.56.56.67.17.17.56.75.66.36.3

Deferred Tax Assets Liabilities Net

Other Assets Noncurrent

us-gaap:OtherAssetsNoncurrent



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312009-12-31
Value259173174169158130191170159180182170176162121118112112115129167167184193202626765772760758701701720695575588595594626
Percentage of OtherAssetsNoncurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets1.20.80.80.90.80.71.11.01.01.11.11.01.11.00.80.80.70.70.70.81.11.11.31.31.53.54.34.94.94.84.65.15.15.14.44.54.64.84.9

Liabilities Current

us-gaap:LiabilitiesCurrent



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312009-12-31
Value109120201567173716892108245025722050266727412860273128362341218817641638196026062548239217811851189126962621264823372812243922562600324629762840230131513338
Percentage of LiabilitiesCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets5.09.37.38.88.911.613.715.212.515.816.417.217.017.614.713.811.410.612.616.716.415.612.512.913.915.214.916.715.117.715.916.318.223.722.621.817.725.226.0

Long Term Debt Current

us-gaap:LongTermDebtCurrent



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312009-12-31
Value7773073075075079329324324324944104104604604601106606606601010101010101010101112364364365368418643268
Percentage of LongTermDebtCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets0.00.00.01.61.62.82.85.55.72.62.63.02.62.52.92.93.00.74.34.24.30.10.10.10.10.10.10.10.10.10.10.12.62.72.82.83.25.12.1

Accounts Payable Current

us-gaap:AccountsPayableCurrent



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312009-12-31
Value74212091129907102711181339102777311409226967038747116975226156206947218911221127111551503138212141205133311539111110134112411194113112151240
Percentage of AccountsPayableCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets3.45.55.34.65.46.17.56.14.76.85.54.24.45.44.54.43.44.04.04.44.65.88.58.88.58.57.97.77.88.47.56.67.89.89.49.28.79.79.7

Taxes Payable Current

us-gaap:TaxesPayableCurrent



Period End2020-03-312019-12-312019-09-302018-12-31
Value61757961
Percentage of TaxesPayableCurrent100.0100.0100.0100.0
Percentage of Assets0.30.30.40.3

Other Liabilities Current

us-gaap:OtherLiabilitiesCurrent



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312009-12-31
Value89285123252119211208184122179166167122166214202126132157256208285120190127401433388357369358396410345352392450424488
Percentage of OtherLiabilitiesCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets0.41.30.61.30.61.21.21.10.71.11.01.00.81.01.31.30.80.91.01.61.31.90.81.30.92.32.52.52.32.32.32.92.92.52.73.03.53.43.8

Long Term Debt

us-gaap:LongTermDebt



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302012-12-31
Value1420012500125001110010300940088008000800085008500830083008300880088008800840084008000800072007200720072007800780065006500
Percentage of LongTermDebt100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets64.657.358.656.254.451.649.147.348.750.550.749.851.751.455.155.656.854.454.251.151.547.050.350.152.744.044.341.041.0

Long Term Debt Noncurrent

us-gaap:LongTermDebtNoncurrent



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312009-12-31
Value14146124791247910754100048873832570917091809180927835791979198320832083208323777372917339719271947196719977547757651165136515651752245225452945324622497636864334
Percentage of LongTermDebtNoncurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets64.457.258.554.452.848.746.541.943.248.048.347.049.349.152.152.653.753.950.146.647.347.050.350.052.743.844.041.142.241.142.437.836.733.134.435.538.229.533.8

Deferred Tax Liabilities Noncurrent

us-gaap:DeferredTaxLiabilitiesNoncurrent



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312009-12-31
Value4425364183472702191325453527673161216231573151814841436143714511430139513031253114419381776171616781592153914571408144613861288122311711037
Percentage of DeferredTaxLiabilitiesNoncurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets2.02.52.01.81.41.20.70.30.30.30.50.410.010.19.89.69.69.39.39.39.29.19.18.78.410.910.110.810.910.010.010.69.910.610.59.99.49.48.1

Pension And Other Postretirement Defined Benefit Plans Liabilities Noncurrent

Minority Interest

Other Liabilities Noncurrent

us-gaap:OtherLiabilitiesNoncurrent



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312009-12-31
Value631525626538501450350357366348339337334321296293273264278276290281229237229472763791712701692672638674592584575566662
Percentage of OtherLiabilitiesNoncurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets2.92.42.92.72.72.52.02.12.22.12.02.02.12.01.91.91.81.71.81.81.91.81.61.71.72.74.35.04.64.44.54.94.54.94.54.54.44.55.2

Stockholders Equity

us-gaap:StockholdersEquity



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312009-12-31
Value55606225621863486442657966526664670155275359540723818821423728633541451753059262365658423372189208521342129206520892256223821852217249924482207
Percentage of StockholdersEquity100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets25.328.529.132.134.036.137.139.440.832.832.032.41.51.21.31.51.92.22.73.33.43.94.44.64.313.212.413.213.813.413.415.115.816.316.617.019.219.617.2

us-gaap:StatementEquityComponents

us-gaap:AccumulatedOtherComprehensiveIncome



Period End2020-03-312019-12-312019-06-302019-03-312018-12-312018-09-302018-06-30
Value-499-374-336-269-188-158-178
Percentage of StockholdersEquity-9.0-6.0-5.3-4.2-2.9-2.4-2.7
Percentage of Assets-2.3-1.7-1.7-1.4-1.0-0.9-1.1
Percentage of Assets us-gaap:AccumulatedOtherComprehensiveIncome0.00.00.00.00.00.00.0

us-gaap:AdditionalPaidInCapital



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-30
Value69897403744874957527761576627699
Percentage of StockholdersEquity125.7118.9119.8118.1116.9115.7115.2115.5
Percentage of Assets31.833.934.937.939.841.842.845.5
Percentage of Assets us-gaap:AdditionalPaidInCapital0.00.00.00.00.00.00.00.0

us-gaap:RetainedEarnings



Period End2020-03-312019-12-312019-06-302019-03-312018-12-312018-09-302018-06-30
Value-141000000
Percentage of StockholdersEquity-2.60.00.00.00.00.00.0
Percentage of Assets-0.60.00.00.00.00.00.0
Percentage of Assets us-gaap:RetainedEarnings0.00.00.00.00.00.00.0

us-gaap:TreasuryStock



Period End2020-03-312019-12-312019-06-302019-03-312018-12-312018-09-302018-06-30
Value-792-808-815-820-851-856-860
Percentage of StockholdersEquity-14.2-13.0-12.8-12.7-12.9-12.9-12.9
Percentage of Assets-3.6-3.7-4.1-4.3-4.7-4.8-5.1
Percentage of Assets us-gaap:TreasuryStock0.00.00.00.00.00.00.0

Common Stock Value

us-gaap:CommonStockValue



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312009-12-31
Value444444444444222222222222222222221111111
Percentage of CommonStockValue100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

Retained Earnings Accumulated Deficit

us-gaap:RetainedEarningsAccumulatedDeficit



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-03-312010-12-312009-12-31
Value-141000000000003000000023721381702252802020200820242097205920152017201919601903190118261685
Percentage of RetainedEarningsAccumulatedDeficit100.00.00.00.00.00.00.00.00.00.00.00.0100.00.00.00.00.00.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets-0.60.00.00.00.00.00.00.00.00.00.00.00.20.00.00.00.00.00.00.10.50.91.21.62.111.411.412.813.613.013.114.614.214.314.414.614.613.1

Treasury Stock Value

us-gaap:TreasuryStockValue



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-03-312010-12-312009-12-31
Value792808812815820851856860863876880883887893897900908917929937942953956961965997100510071010103910481050903935947652663683
Percentage of TreasuryStockValue100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets3.63.73.84.14.34.74.85.15.35.25.35.35.55.55.65.75.95.96.06.06.16.26.76.77.15.65.76.46.56.66.87.66.36.87.25.05.35.3

Accumulated Other Comprehensive Income Loss Net Of Tax

us-gaap:AccumulatedOtherComprehensiveIncomeLossNetOfTax



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312009-12-31
Value-499-374-421-336-269-188-158-178-174-188-181-176-139-154-154-159-134-127-136-135-139-136-107-113-109-121-219-211-223-216-240-205-178-206-174-131-135-108-118
Percentage of AccumulatedOtherComprehensiveIncomeLossNetOfTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets-2.3-1.7-2.0-1.7-1.4-1.0-0.9-1.1-1.1-1.1-1.1-1.1-0.9-1.0-1.0-1.0-0.9-0.8-0.9-0.9-0.9-0.9-0.8-0.8-0.8-0.7-1.2-1.3-1.4-1.4-1.6-1.5-1.3-1.5-1.3-1.0-1.0-0.9-0.9

Net Cash Provided By Used In Operating Activities

us-gaap:NetCashProvidedByUsedInOperatingActivities



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-03-312012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value42261935861435367051350749537929337326942939030222931136129439415334454904712264263301542276477416832558
Percentage of NetCashProvidedByUsedInOperatingActivities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Revenues19.823.315.925.012.721.415.117.116.010.010.113.79.816.216.614.212.916.219.013.82.214.610.71.515.513.39.012.58.14.36.516.82.35.71.214.2

Net Cash Provided By Used In Investing Activities

us-gaap:NetCashProvidedByUsedInInvestingActivities



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-03-312012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value-964-1120-1015-767-864-630-883-345-255-173-210-74-109-130-186-128-169-248-286-321-333-1374-371-381-439-494-424-314-474-387-319-189-213249-103-66
Percentage of NetCashProvidedByUsedInInvestingActivities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Revenues-45.2-42.1-44.9-31.2-31.1-20.1-26.0-11.7-8.2-4.6-7.3-2.7-4.0-4.9-7.9-6.0-9.6-12.9-15.1-15.1-18.5-48.3-11.9-12.4-13.9-14.0-16.8-9.2-11.7-10.8-9.1-4.9-6.58.5-3.7-1.7

Net Cash Provided By Used In Financing Activities

us-gaap:NetCashProvidedByUsedInFinancingActivities



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-03-312012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value1052-1511056398527-112439-164-259-180-402-277-97-287-147-129-19-4-26213360980-1694849-416-46859470-95-300380120-4716-354
Percentage of NetCashProvidedByUsedInFinancingActivities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Revenues49.3-5.746.716.219.0-3.612.9-5.5-8.4-4.8-13.9-10.2-3.6-10.8-6.3-6.1-1.1-0.2-13.80.720.034.5-5.415.80.3-11.8-18.517.41.7-2.6-8.69.83.7-16.00.2-9.0

Net Cash Provided By Used In Operating Activities

us-gaap:NetCashProvidedByUsedInOperatingActivities



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-03-312012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value42261935861435367051350749537929337326942939030222931136129439415334454904712264263301542276477416832558
Percentage of NetCashProvidedByUsedInOperatingActivities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Revenues19.823.315.925.012.721.415.117.116.010.010.113.79.816.216.614.212.916.219.013.82.214.610.71.515.513.39.012.58.14.36.516.82.35.71.214.2

Net Income Loss

Profit Loss

us-gaap:ProfitLoss



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value-14132030931133729231328226664166175186194194179174-28160150952011141402061841477916519516414923326416013419914712086186
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-6.612.013.712.712.19.39.29.58.61.75.76.56.87.38.28.49.9-1.58.57.15.37.13.74.66.54.44.12.44.75.45.45.96.86.54.53.85.24.54.13.14.8

us-gaap:StatementEquityComponents

us-gaap:RetainedEarnings



Period End2020-03-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-03-312012-06-302012-03-312011-12-312011-09-302011-06-302011-03-31
Value-141309311337292313281264631657187909285832582766094646193112601221156055130
Percentage of ProfitLoss100.0100.0100.0100.0100.099.899.699.497.399.540.746.946.547.447.847.7-90.451.150.763.546.956.443.845.367.940.952.643.437.540.965.3
Percentage of Revenues-6.613.712.712.19.39.29.58.51.75.72.63.23.43.94.04.71.34.33.63.43.32.12.03.03.22.43.62.81.71.63.4
Percentage of Revenues us-gaap:RetainedEarnings0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

Depreciation Depletion And Amortization

us-gaap:DepreciationDepletionAndAmortization



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value132125121114114110107106104103102100999998999493888685807472679491908184837775787976777577
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

us-gaap:StatementBusinessSegments

oke:NaturalGasGatheringAndProcessing



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-31
Value5857555352504948474746464445444641403735353431292827272523
Percentage of DepreciationDepletionAndAmortization44.445.645.946.646.146.145.845.345.845.445.845.645.245.645.746.844.343.942.241.341.642.542.040.842.80.029.027.326.5

oke:NaturalGasLiquids



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-31
Value5752504646454342424241414141404040403939393431312724222219
Percentage of DepreciationDepletionAndAmortization43.742.041.540.340.640.740.740.340.741.341.041.141.441.441.441.043.143.544.545.345.742.542.443.140.20.024.424.321.9

oke:NaturalGasPipelines



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-31
Value1414141414131314131312121212121111101010101010101010101011
Percentage of DepreciationDepletionAndAmortization11.211.611.812.312.412.512.713.612.712.612.512.512.612.212.211.511.811.812.412.412.513.314.615.116.00.011.511.812.2

oke:TotalSegments



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-31
Value1311251201141131091061051031031011009898979893
Percentage of DepreciationDepletionAndAmortization99.399.399.399.299.299.299.299.299.299.399.399.299.299.299.299.399.2

us-gaap:IntersegmentElimination



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-312012-09-302012-06-302012-03-31
Value0000000000000000000001000000010
Percentage of DepreciationDepletionAndAmortization0.70.70.70.80.80.80.80.80.80.70.70.80.80.80.80.70.80.80.90.90.11.70.90.91.00.70.70.7-0.41.80.6

Increase Decrease In Other Operating Capital Net

us-gaap:IncreaseDecreaseInOtherOperatingCapitalNet



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-03-312012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value-129-45-3-51114-27-4-2552-52-3453-17-24-2127257-2852-2034-30-1-2214244115-1136765-8-184158
Percentage of IncreaseDecreaseInOtherOperatingCapitalNet100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Increase Decrease In Inventories

us-gaap:IncreaseDecreaseInInventories



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-03-312012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value-1732198-58-53-129140100-14928114653-77-288927-14-7-6884-2043-2363214262-251-92-107-166301-5-160-175177
Percentage of IncreaseDecreaseInInventories100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Net Cash Provided By Used In Investing Activities

us-gaap:NetCashProvidedByUsedInInvestingActivities



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-03-312012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value-964-1120-1015-767-864-630-883-345-255-173-210-74-109-130-186-128-169-248-286-321-333-1374-371-381-439-494-424-314-474-387-319-189-213249-103-66
Percentage of NetCashProvidedByUsedInInvestingActivities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Revenues-45.2-42.1-44.9-31.2-31.1-20.1-26.0-11.7-8.2-4.6-7.3-2.7-4.0-4.9-7.9-6.0-9.6-12.9-15.1-15.1-18.5-48.3-11.9-12.4-13.9-14.0-16.8-9.2-11.7-10.8-9.1-4.9-6.58.5-3.7-1.7

Payments To Acquire Property Plant And Equipment

us-gaap:PaymentsToAcquirePropertyPlantAndEquipment



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value949110910198308898316943502641811358211213315813619625730028534357438239242953755950145843234847333832919422617611168
Percentage of PaymentsToAcquirePropertyPlantAndEquipment100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:StatementBusinessSegments

oke:NaturalGasGatheringAndProcessing



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-31
Value18125224521321526121310811198853763849984141195231205255392214168122199204206163
Percentage of PaymentsToAcquirePropertyPlantAndEquipment19.122.824.125.724.231.430.731.042.254.163.344.956.063.663.061.972.075.777.171.974.268.456.242.828.60.038.136.832.7

oke:NaturalGasLiquids



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-31
Value746827738591639519444216124542712202030203440525973160153210273354230269274
Percentage of PaymentsToAcquirePropertyPlantAndEquipment78.674.672.471.371.962.564.161.847.229.920.015.018.115.319.315.217.415.817.620.721.427.940.253.763.60.042.948.254.7

oke:NaturalGasPipelines



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-31
Value16212721284731201924182625242429171814159171086121165
Percentage of PaymentsToAcquirePropertyPlantAndEquipment1.71.92.72.63.25.74.55.87.513.713.932.522.218.415.521.49.17.14.95.52.83.02.82.21.50.02.11.11.1

oke:TotalSegments



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-31
Value9441101101182688382868934625617713176108129154134193
Percentage of PaymentsToAcquirePropertyPlantAndEquipment99.499.399.399.599.399.599.398.797.097.797.292.496.397.397.798.598.6

us-gaap:IntersegmentElimination



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-312012-09-302012-06-302012-03-31
Value57746344743643322315542526493839
Percentage of PaymentsToAcquirePropertyPlantAndEquipment0.60.70.70.50.70.50.71.33.02.32.87.63.72.72.31.51.41.40.51.91.60.80.71.36.30.91.60.81.90.92.6

Net Cash Provided By Used In Financing Activities

us-gaap:NetCashProvidedByUsedInFinancingActivities



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-03-312012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value1052-1511056398527-112439-164-259-180-402-277-97-287-147-129-19-4-26213360980-1694849-416-46859470-95-300380120-4716-354
Percentage of NetCashProvidedByUsedInFinancingActivities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Revenues49.3-5.746.716.219.0-3.612.9-5.5-8.4-4.8-13.9-10.2-3.6-10.8-6.3-6.1-1.1-0.2-13.80.720.034.5-5.415.80.3-11.8-18.517.41.7-2.6-8.69.83.7-16.00.2-9.0

Proceeds From Issuance Of Long Term Debt

us-gaap:ProceedsFromIssuanceOfLongTermDebt



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-03-312012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value174801992750144255012450001190000001000049207980-1199011990069900012950000
Percentage of ProceedsFromIssuanceOfLongTermDebt100.00.0100.0100.0100.0100.0100.00.00.0100.0100.00.00.00.00.00.0100.00.0100.00.0100.00.0100.00.0100.00.00.0100.00.00.00.0100.00.00.00.00.0

Repayments Of Long Term Debt

us-gaap:RepaymentsOfLongTermDebt



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-03-312012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value52155115011426150119881145112652111111155113533393403228332533
Percentage of RepaymentsOfLongTermDebt100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of LongTermDebtAndCapitalLeaseObligations0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

Payments Of Dividends

us-gaap:PaymentsOfDividends



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-03-312012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value386378367357354351339327316285283129129129129129129128128126126122121116837363635757555551484646
Percentage of PaymentsOfDividends100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Payments Of Dividends

us-gaap:PaymentsOfDividends



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-03-312012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value386378367357354351339327316285283129129129129129129128128126126122121116837363635757555551484646
Percentage of PaymentsOfDividends100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Payments For Repurchase Of Common Stock

Repayments Of Long Term Debt

us-gaap:RepaymentsOfLongTermDebt



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-03-312012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value52155115011426150119881145112652111111155113533393403228332533
Percentage of RepaymentsOfLongTermDebt100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of LongTermDebtAndCapitalLeaseObligations0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

Debt Instrument Interest Rate Stated Percentage

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

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

Share Based Compensation

Deferred Tax Liabilities

Deferred Tax Assets Net

Operating Lease Right Of Use Asset

oke:LeaseDescription

us-gaap:OperatingLeaseRightOfUseAsset

oke:CertainOperatingLeasesEnteredIntoDuringThePeriod



Period End2020-03-31
Value17
Percentage of OperatingLeaseRightOfUseAsset100.0

oke:LeaseremainingbalancerelatedtoleaseenteredinDecember2019MemberMember



Period End2020-03-31
Value74
Percentage of OperatingLeaseRightOfUseAsset430.2

Cash And Cash Equivalents Period Increase Decrease

us-gaap:CashAndCashEquivalentsPeriodIncreaseDecrease



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-03-312012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value510-65239924515-7269-2-1925-32021611156433959-187-136621-20714860-439-666706-73-329-392839-19-52-64138
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

Proceeds From Repayments Of Short Term Debt

us-gaap:ProceedsFromRepaymentsOfShortTermDebt



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-31
Value-220220000-120-36156-614-317-342-16180416117131-101
Percentage of ProceedsFromRepaymentsOfShortTermDebt100.0100.00.00.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:StatementBusinessSegments

oke:AdjustedEBITDA

oke:NaturalGasGatheringAndProcessing



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-06-302015-03-31
Value1591881751861521741591661301441411281031261091101007860
Percentage of AdjustedEBITDA100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

oke:NaturalGasLiquids



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-06-302015-03-31
Value410373367346377347399352342309293273278253279276270244192
Percentage of AdjustedEBITDA257.4198.4209.6185.8248.0199.0250.0211.0262.0214.5207.1213.1267.6200.3254.2250.8270.1313.3318.3

oke:NaturalGasPipelines



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-06-302015-03-31
Value112971031001069790859388878082898068746570
Percentage of AdjustedEBITDA70.551.959.253.970.155.656.551.271.761.561.762.979.871.073.162.174.383.6116.8

oke:TotalSegments



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-31
Value683660646633636619648604566542523482465470469455444
Percentage of AdjustedEBITDA427.9350.3368.9339.7418.1354.6406.5362.1433.7375.9368.7376.0447.4371.3427.4412.9444.4

us-gaap:DerivativeInstrumentRisk, us-gaap:DerivativeInstrumentsGainLossByHedgingRelationship, us-gaap:IncomeStatementLocation

oke:DerivativeInstrumentsGainLossReclassifiedfromAccumulatedOCIintoIncomeNet

us-gaap:CommodityContract, us-gaap:CashFlowHedging, us-gaap:CostOfSales



Period End2020-03-312019-03-31
Value-15-4
Percentage of DerivativeInstrumentsGainLossReclassifiedfromAccumulatedOCIintoIncomeNet100.0100.0

us-gaap:CommodityContract, us-gaap:CashFlowHedging, us-gaap:Sales



Period End2020-03-312019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-03-31
Value44151812-20-10-11-15
Percentage of DerivativeInstrumentsGainLossReclassifiedfromAccumulatedOCIintoIncomeNet-299.20.0-379.30.00.00.00.00.0

us-gaap:InterestRateContract, us-gaap:CashFlowHedging, us-gaap:InterestExpense



Period End2020-03-312019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-03-31
Value-10-4-2-4-4-5-3-5
Percentage of DerivativeInstrumentsGainLossReclassifiedfromAccumulatedOCIintoIncomeNet68.30.050.40.00.00.00.00.0

us-gaap:DerivativeInstrumentsGainLossByHedgingRelationship

us-gaap:CashFlowHedging



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-03-31
Value19-111110168-25-15-15-20
Percentage of DerivativeInstrumentsGainLossReclassifiedfromAccumulatedOCIintoIncomeNet-130.90.00.00.0-328.90.00.00.00.00.0

us-gaap:DerivativeInstrumentRisk, us-gaap:DerivativeInstrumentsGainLossByHedgingRelationship

oke:DerivativeInstrumentsGainLossRecognizedinOtherComprehensiveLossNet

us-gaap:CommodityContract, us-gaap:CashFlowHedging



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-03-31
Value87-53233-21109-30-462027
Percentage of DerivativeInstrumentsGainLossRecognizedinOtherComprehensiveLossNet100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:InterestRateContract, us-gaap:CashFlowHedging



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-03-31
Value-22572-128-107-67-1302620231
Percentage of DerivativeInstrumentsGainLossRecognizedinOtherComprehensiveLossNet-258.1-1435.0-398.0-322.2314.0-119.5-85.1-43.3114.35.6

us-gaap:DerivativeInstrumentsGainLossByHedgingRelationship

us-gaap:CashFlowHedging



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-03-31
Value-13767-95-74-89-21-4-264428
Percentage of DerivativeInstrumentsGainLossRecognizedinOtherComprehensiveLossNet-158.1-1335.0-298.0-222.2414.0-19.514.956.7214.3105.6

us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName, oke:ReportableSegmentByName

oke:ImpairmentOfEquityMethodInvestmentDifferenceBetweenCarryingAmountAndUnderlyingEquity

oke:VeniceEnergyServicesCompany, oke:NaturalGasGatheringAndProcessing



Period End2020-03-31
Value22
Percentage of ImpairmentOfEquityMethodInvestmentDifferenceBetweenCarryingAmountAndUnderlyingEquity100.0

oke:Impairmentoflonglivedassetsgoodwillandotherassetimpairmentcharges



Period End2020-03-312019-03-31
Value6040
Percentage of Impairmentoflonglivedassetsgoodwillandotherassetimpairmentcharges100.00.0

oke:OtherComprehensiveIncomeLossPortionAttributabletoEquityMethodInvestmentsNetofTax



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-06-302015-03-31
Value-73-4-3-2-210200-1080-4-400
Percentage of OtherComprehensiveIncomeLossPortionAttributabletoEquityMethodInvestmentsNetofTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.00.0

oke:OtherComprehensiveIncomeLossPortionAttributabletoEquityMethodInvestmentsTax



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-06-302015-03-31
Value2-111000000000100000
Percentage of OtherComprehensiveIncomeLossPortionAttributabletoEquityMethodInvestmentsTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.00.0

oke:OtherCorporateCostsandNoncashItems



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-30
Value-33-19-20-14-13-10-32-4-55436-404
Percentage of OtherCorporateCostsandNoncashItems100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:StatementBusinessSegments

oke:PublicUtilitiesAllowanceforFundsUsedDuringConstructionCapitalizedCostofEquityandOther

oke:NaturalGasGatheringAndProcessing



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-31
Value-42213013122000001
Percentage of PublicUtilitiesAllowanceforFundsUsedDuringConstructionCapitalizedCostofEquityandOther100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

oke:NaturalGasLiquids



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-31
Value-63425024223000000
Percentage of PublicUtilitiesAllowanceforFundsUsedDuringConstructionCapitalizedCostofEquityandOther147.2129.3144.8174.3144.628.8133.2141.9152.2128.1111.5-84.9-17.5118.8-3.1-109.7-39.1

oke:NaturalGasPipelines



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-31
Value-1101101200001-14-13
Percentage of PublicUtilitiesAllowanceforFundsUsedDuringConstructionCapitalizedCostofEquityandOther43.740.8-24.395.528.7151.861.772.514.040.37.3-9.2548.7184.5528.3-433.3274.3

oke:TotalSegments



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-31
Value-1366510051045601-25-13
Percentage of PublicUtilitiesAllowanceforFundsUsedDuringConstructionCapitalizedCostofEquityandOther290.9270.1220.5369.8273.3280.6294.8314.4266.2268.5218.95.8631.2403.3625.2-443.0335.2

us-gaap:AssetImpairmentCharges



Period End2020-03-312019-03-312018-12-312018-09-302017-12-312017-09-302016-12-312016-09-30
Value64100002000
Percentage of AssetImpairmentCharges100.00.00.00.00.0100.00.00.0

us-gaap:StatementBusinessSegments

oke:NaturalGasGatheringAndProcessing



Period End2020-03-312017-12-312017-09-30
Value564020
Percentage of AssetImpairmentCharges87.90.0100.0

oke:NaturalGasLiquids



Period End2020-03-312017-12-312017-09-30
Value7700
Percentage of AssetImpairmentCharges12.10.00.0

oke:TotalSegments



Period End2020-03-312017-12-312017-09-30
Value641020
Percentage of AssetImpairmentCharges100.00.0100.0

us-gaap:CommonStockDividendsPerShareCashPaid



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312009-09-302009-06-302009-03-31
Value0.9350.9150.890.8650.860.8550.8250.7950.770.7450.7450.6150.6150.6150.6150.6150.6150.6150.6050.6050.6050.590.5750.560.40.380.380.360.360.330.330.330.3050.560.560.560.520.520.460.440.440.420.420.40.4
Percentage of CommonStockDividendsPerShareCashPaid100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DeferredIncomeTaxExpenseBenefit



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value-55103969775961028674258955592565247522319
Percentage of DeferredIncomeTaxExpenseBenefit100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:RetirementPlanType

us-gaap:DefinedBenefitPlanAmortizationOfGainsLosses

us-gaap:OtherPostretirementBenefitPlansDefinedBenefit



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-30
Value-1000.0-75000.0-74000.0-74000.0-74000.0-336000.0-334000.0-334000.0-334000.0-420000.0-419000.0-420000.0-420000.0-262000.0-262000.0
Percentage of DefinedBenefitPlanAmortizationOfGainsLosses100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:PensionPlansDefinedBenefit



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-30
Value-4-3-3-3-3-4-4-4-4-3-3-3-3-2-2
Percentage of DefinedBenefitPlanAmortizationOfGainsLosses457100.04233.34267.64267.64267.61275.61274.91274.91274.9811.9809.5807.6807.61051.91044.7

us-gaap:RetirementPlanType

us-gaap:DefinedBenefitPlanAmortizationOfPriorServiceCostCredit

us-gaap:OtherPostretirementBenefitPlansDefinedBenefit



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-30
Value0.0-56000.0-57000.0-57000.0-57000.0-417000.0-415000.0-415000.0-415000.0-417000.0-415000.0-415000.0-415000.0-416000.0-416000.0
Percentage of DefinedBenefitPlanAmortizationOfPriorServiceCostCredit0.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:PensionPlansDefinedBenefit



Period End2020-03-312019-03-312018-03-312017-03-31
Value28000.00.00.00.0
Percentage of DefinedBenefitPlanAmortizationOfPriorServiceCostCredit0.0-0.0-0.0-0.0

us-gaap:RetirementPlanType, us-gaap:SubsequentEventType

us-gaap:DefinedBenefitPlanContributionsByEmployer

us-gaap:PensionPlansDefinedBenefit, us-gaap:SubsequentEvent



Period End2020-03-312019-03-312018-03-31
Value121412
Percentage of DefinedBenefitPlanContributionsByEmployer100.0100.0100.0

us-gaap:RetirementPlanType

us-gaap:DefinedBenefitPlanExpectedReturnOnPlanAssets

us-gaap:OtherPostretirementBenefitPlansDefinedBenefit



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-30
Value722000.0575000.0570000.0570000.0570000.0674000.0672000.0672000.0672000.0565000.0564000.0564000.0564000.0531000.0531000.0
Percentage of DefinedBenefitPlanExpectedReturnOnPlanAssets100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:PensionPlansDefinedBenefit



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-30
Value655556555555555
Percentage of DefinedBenefitPlanExpectedReturnOnPlanAssets863.21030.31033.71033.71033.7891.7888.2888.2888.2950.1946.1946.1946.1963.7956.1

us-gaap:RetirementPlanType

us-gaap:DefinedBenefitPlanInterestCost

us-gaap:OtherPostretirementBenefitPlansDefinedBenefit



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-30
Value442000.0511000.0509000.0509000.0509000.0527000.0527000.0527000.0527000.0566000.0565000.0565000.0565000.0601000.0601000.0
Percentage of DefinedBenefitPlanInterestCost100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:PensionPlansDefinedBenefit



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-30
Value455554444444444
Percentage of DefinedBenefitPlanInterestCost1034.81007.81007.11007.11007.1841.6836.4836.4836.4826.9823.9823.9823.9828.6823.0

us-gaap:RetirementPlanType

us-gaap:DefinedBenefitPlanNetPeriodicBenefitCost

us-gaap:OtherPostretirementBenefitPlansDefinedBenefit



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-30
Value-164000.072000.073000.073000.073000.0-16000.0-15000.0-15000.0-15000.0171000.0170000.0171000.0171000.065000.065000.0
Percentage of DefinedBenefitPlanNetPeriodicBenefitCost100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:PensionPlansDefinedBenefit



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-30
Value444444444444444
Percentage of DefinedBenefitPlanNetPeriodicBenefitCost-3034.86061.15953.45953.45953.4-28462.5-30193.3-30193.3-30193.32604.12607.12592.42592.46544.66504.6

us-gaap:RetirementPlanType

us-gaap:DefinedBenefitPlanServiceCost

us-gaap:OtherPostretirementBenefitPlansDefinedBenefit



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-30
Value115000.0117000.0117000.0117000.0117000.0212000.0211000.0211000.0211000.0167000.0165000.0165000.0165000.0149000.0149000.0
Percentage of DefinedBenefitPlanServiceCost100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:PensionPlansDefinedBenefit



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-30
Value211111111111111
Percentage of DefinedBenefitPlanServiceCost1770.41677.81670.11670.11670.1869.3868.2868.2868.21036.51043.01043.61043.61097.31088.6

us-gaap:DirectOperatingCosts



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-30
Value207259245237240236230230210216207217191204184191177184164165179181172172149236233259229231224249209225221220203203
Percentage of DirectOperatingCosts100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:StatementBusinessSegments

oke:NaturalGasGatheringAndProcessing



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-31
Value8497918594969093888480737177696969786163696964596451454451
Percentage of DirectOperatingCosts40.837.537.236.139.140.639.540.742.039.038.733.637.437.837.736.139.342.537.338.438.738.237.334.543.50.019.019.319.9

oke:NaturalGasLiquids



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-31
Value89116114114110104101998810390877890798373807477827876766565575459
Percentage of DirectOperatingCosts43.345.046.948.345.944.343.943.342.147.743.640.141.044.543.343.741.343.545.446.845.943.244.644.243.70.024.123.223.1

oke:NaturalGasPipelines



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-31
Value3344403636393634333329303130282927262625272827272725232427
Percentage of DirectOperatingCosts16.117.016.415.415.116.715.915.215.815.614.414.216.515.015.415.215.514.416.215.315.215.616.215.918.40.09.910.710.5

oke:TotalSegments



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-31
Value207257246237240240228228210221200191182198177182170
Percentage of DirectOperatingCosts100.199.5100.599.8100.1101.799.299.1100.0102.396.787.895.097.396.495.096.2

us-gaap:IntersegmentElimination



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-312012-09-302012-06-302012-03-31
Value01-100-4110-4626956960100539-821000-1
Percentage of DirectOperatingCosts-0.10.5-0.50.2-0.1-1.70.80.90.0-2.33.312.25.02.73.65.03.8-0.41.1-0.50.23.01.95.4-5.61.20.5-0.00.1-0.2-0.7

us-gaap:DividendsCommonStock



Period End2020-03-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-30
Value386367357354351339327316286283
Percentage of DividendsCommonStock100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:StatementEquityComponents

us-gaap:AdditionalPaidInCapital



Period End2020-03-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-30
Value38658451759264611222117
Percentage of DividendsCommonStock100.016.012.84.916.87.914.33.877.841.5

us-gaap:RetainedEarnings



Period End2020-03-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-30
Value030831133629231228030463165
Percentage of DividendsCommonStock0.084.087.295.183.292.185.796.222.058.5

us-gaap:DividendsPreferredStock



Period End2020-03-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-30
Value275000.0275000.0275000.0275000.0275000.0275000.0275000.0275000.0274000.0710000.0
Percentage of DividendsPreferredStock100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:StatementEquityComponents

us-gaap:AdditionalPaidInCapital



Period End2020-03-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-30
Value275000.00.00.00.00.00.0-275000.0275000.0274000.0710000.0
Percentage of DividendsPreferredStock100.00.00.00.00.00.0-100.0100.0100.0100.0

us-gaap:RetainedEarnings



Period End2020-03-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-30
Value0.0275000.0275000.0275000.0275000.0275000.0550000.00.00.00.0
Percentage of DividendsPreferredStock0.0100.0100.0100.0100.0100.0200.00.00.00.0

us-gaap:SubsequentEventType

us-gaap:SubsequentEvent



Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-30
Value300000.0300000.0300000.0300000.0300000.0300000.0300000.0300000.0300000.0300000.0275000.0352000.0
Percentage of DividendsPreferredStock0.0109.10.0109.1109.1109.1109.1109.1109.1109.1100.449.6

us-gaap:EmployeeBenefitsAndShareBasedCompensationNoncash



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-30
Value-169551051293431113
Percentage of EmployeeBenefitsAndShareBasedCompensationNoncash100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:EquityMethodInvestmentDividendsOrDistributions



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-03-312012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-03-31
Value41423935454441434142424239383425466330322933233030233236453127272721
Percentage of EquityMethodInvestmentDividendsOrDistributions100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:EquityMethodInvestmentOtherThanTemporaryImpairment



Period End2020-03-312019-03-312018-12-312018-09-302017-12-312017-09-302016-12-312016-09-302014-12-312013-12-31
Value3700004001290
Percentage of EquityMethodInvestmentOtherThanTemporaryImpairment100.00.00.00.00.0100.00.00.0100.00.0

us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName, oke:ReportableSegmentByName

oke:ChisholmPipelineCompany, oke:NaturalGasLiquids



Period End2020-03-31
Value7
Percentage of EquityMethodInvestmentOtherThanTemporaryImpairment19.1

oke:VeniceEnergyServicesCompany, oke:NaturalGasGatheringAndProcessing



Period End2020-03-31
Value30
Percentage of EquityMethodInvestmentOtherThanTemporaryImpairment80.8

us-gaap:FairValueNetDerivativeAssetLiabilityMeasuredOnRecurringBasisUnobservableInputsReconciliationGainLossIncludedInOtherComprehensiveIncomeLoss



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-30
Value211287-55-7-26
Percentage of FairValueNetDerivativeAssetLiabilityMeasuredOnRecurringBasisUnobservableInputsReconciliationGainLossIncludedInOtherComprehensiveIncomeLoss100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:FairValueNetDerivativeAssetLiabilityMeasuredOnRecurringBasisUnobservableInputsReconciliationSettlements



Period End2020-03-312019-03-31
Value-16-25
Percentage of FairValueNetDerivativeAssetLiabilityMeasuredOnRecurringBasisUnobservableInputsReconciliationSettlements100.0100.0

us-gaap:FairValueNetDerivativeAssetLiabilityMeasuredOnRecurringBasisUnobservableInputsReconciliationTransfersIntoLevel3



Period End2020-03-312019-03-31
Value201
Percentage of FairValueNetDerivativeAssetLiabilityMeasuredOnRecurringBasisUnobservableInputsReconciliationTransfersIntoLevel3100.0100.0

us-gaap:FinanceLeasePrincipalPayments



Period End2020-03-312019-03-31
Value469000.0425000.0
Percentage of FinanceLeasePrincipalPayments100.0100.0

us-gaap:GainLossOnSaleOfPropertyPlantEquipment



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value000-20000000000504600051000000000000-3-1600
Percentage of GainLossOnSaleOfPropertyPlantEquipment100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:GainsLossesOnExtinguishmentOfDebt



Period End2020-03-31
Value15
Percentage of GainsLossesOnExtinguishmentOfDebt100.0

oke:ReportableSegmentByName

us-gaap:ImpairmentOfLongLivedAssetsHeldForUse

oke:NaturalGasGatheringAndProcessing



Period End2020-03-31
Value380
Percentage of ImpairmentOfLongLivedAssetsHeldForUse100.0

oke:NaturalGasLiquids



Period End2020-03-31
Value70
Percentage of ImpairmentOfLongLivedAssetsHeldForUse18.4

us-gaap:IncomeLossFromEquityMethodInvestments



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value44393734434239364040403939393532323232303034-5225332726252829343332293230292021
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:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName

oke:NorthernBorderPipeline



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-30
Value2218161320181615171716151817171518151615191614152316151618162019191620192112
Percentage of IncomeLossFromEquityMethodInvestments49.646.442.940.147.844.941.941.742.642.941.039.747.645.250.848.656.749.350.150.863.747.2-27.562.469.559.957.863.463.655.158.457.861.655.565.064.272.159.8

oke:OtherUnconsolidatedAffiliate



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-30
Value1-1-1-1-10001-117878330555412211110332322112
Percentage of IncomeLossFromEquityMethodInvestments4.4-3.2-3.8-3.3-2.4-0.11.1-1.34.2-29.719.522.518.221.29.79.42.817.317.217.114.05.1-4.18.05.36.27.27.72.310.710.76.99.87.67.53.96.514.1

oke:OverlandPassPipelineCompany



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-30
Value1415151517171616161515141313131313101096133445524555454410
Percentage of IncomeLossFromEquityMethodInvestments31.639.041.245.340.040.640.944.440.839.339.437.834.333.639.542.040.433.432.732.022.338.5-7.416.214.121.120.911.215.720.515.416.313.518.113.614.43.40.0

oke:RoadrunnerGasTransmission



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value6776666544444
Percentage of IncomeLossFromEquityMethodInvestments14.417.819.717.814.614.616.015.212.312.312.212.411.1

us-gaap:StatementBusinessSegments

oke:NaturalGasGatheringAndProcessing



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-31
Value0-1-1-1-100012332222244444-71557456
Percentage of IncomeLossFromEquityMethodInvestments1.8-4.1-4.9-4.8-2.8-1.30.2-2.24.25.68.69.66.67.07.48.08.613.613.516.413.712.7135.820.016.30.017.019.824.5

oke:NaturalGasLiquids



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-31
Value1515151517171616161515151313131313111096134446653
Percentage of IncomeLossFromEquityMethodInvestments34.239.942.346.840.341.841.845.340.939.238.238.334.733.939.743.040.634.633.832.322.640.1-8.317.514.20.023.122.412.1

oke:NaturalGasPipelines



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-31
Value2825231927252220222221202323181516161615191614152316161516
Percentage of IncomeLossFromEquityMethodInvestments64.064.262.657.962.459.558.056.855.055.253.352.158.759.152.949.150.951.852.751.363.747.2-27.562.469.50.059.957.863.4

oke:TotalSegments



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-31
Value4439373443423936404040393939353232
Percentage of IncomeLossFromEquityMethodInvestments100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:IncreaseDecreaseInAccountsPayable



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-03-312012-03-31
Value-35099105-205-62-27824078-361179216-11-12214934168-64-13-55-10-125-306-107-3127-103-176
Percentage of IncreaseDecreaseInAccountsPayable100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:IncreaseDecreaseInDerivativeAssetsAndLiabilities



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-31
Value78-699-2-4-505-38-34-332-20-4529-113623-12-20560-31-8-8-10
Percentage of IncreaseDecreaseInDerivativeAssetsAndLiabilities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:IncreaseDecreaseInInterestPayableNet



Period End2020-03-312019-12-312019-03-312018-12-312018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-31
Value-6868-4749-3738-1421-228-1515-2420-611-12-22-6-119-1614
Percentage of IncreaseDecreaseInInterestPayableNet100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:IncreaseDecreaseInReceivables



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-03-312012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value-33411949-143-6-26615090-35829715614-13714059153-680-9875-134-224-139-13011290-360-180-138-1415553-47435295235
Percentage of IncreaseDecreaseInReceivables100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:InterestCostsCapitalized



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-312012-09-302012-06-302012-03-312011-09-302011-06-30
Value303327261912852111113221089713141115141112119854
Percentage of InterestCostsCapitalized100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:NetIncomeLossAttributableToParentDiluted



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-30
Value-14231930831133629231228026462165718790928684278676609364699162011265601081126055129815541
Percentage of NetIncomeLossAttributableToParentDiluted100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OperatingLeasePayments



Period End2020-03-312019-03-31
Value21
Percentage of OperatingLeasePayments100.0100.0

us-gaap:OtherComprehensiveIncomeLossNetOfTax



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-312012-09-302012-06-302012-03-31
Value-12547-84-66-81-3020-351-6-55444711-85-28926-18-2311-19-8-943-13-57-4140
Percentage of OtherComprehensiveIncomeLossNetOfTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:StatementEquityComponents

us-gaap:AccumulatedOtherComprehensiveIncome



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-03-31
Value-12547-84-66-81-3020-351-6-531504-24-7804-3-285-38-6
Percentage of OtherComprehensiveIncomeLossNetOfTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.059.634.70.043.428.925.694.1-38.568.519.0120.847.016.6-100.745.8

us-gaap:OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentNetOfTax



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-312012-09-302012-06-302012-03-31
Value-316-2-2-24-3-3-210-2-2-221-1-1-1-8-2-2-231-2-2-3767555
Percentage of OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentNetOfTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansTax



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-312012-09-302012-06-302012-03-31
Value-1500010003-1-1-114-1-1-1-5-1-1-121-1-1-2-4-44-3-33
Percentage of OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIOnDerivativesNetOfTax



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-31
Value15-888126-19-12-11-23-13-9-17-6-38819151196-3-7-37-303-7
Percentage of OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIOnDerivativesNetOfTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIOnDerivativesTax



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-31
Value4-22141-5-3-3-13-7-2-3-1011321100-1-13002-4
Percentage of OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIOnDerivativesTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetGainLossTax



Period End2020-03-312019-03-31
Value10
Percentage of OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetGainLossTax100.0100.0

us-gaap:OtherComprehensiveIncomeUnrealizedGainLossOnDerivativesArisingDuringPeriodNetOfTax



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value-10651-73-57-68-16-3-2034-20-20-524537-73-16201415-10146-28-49-253-13-30-124718-3716-16-11391443
Percentage of OtherComprehensiveIncomeUnrealizedGainLossOnDerivativesArisingDuringPeriodNetOfTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OtherComprehensiveIncomeUnrealizedGainLossOnDerivativesArisingDuringPeriodTax



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value31-15221720416-1027-120491-13-3312-121-3-100133124-19-1914-514-24-4-18
Percentage of OtherComprehensiveIncomeUnrealizedGainLossOnDerivativesArisingDuringPeriodTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OtherCostAndExpenseOperating



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-30
Value175231218206207213206202181194182190162179165
Percentage of OtherCostAndExpenseOperating100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OtherNonoperatingExpense



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value336433343102101000-271112125102042-413025271
Percentage of OtherNonoperatingExpense100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OtherNonoperatingIncome



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value85659-65103344-34400003203163750900036602
Percentage of OtherNonoperatingIncome100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OtherOperatingActivitiesCashFlowStatement



Period End2020-03-312019-12-312019-03-312018-12-312014-12-312014-09-302014-06-302014-03-312013-03-312012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-30
Value-302-1630000-20-1000000
Percentage of OtherOperatingActivitiesCashFlowStatement100.0100.0100.0100.00.00.00.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:PaymentsForProceedsFromOtherInvestingActivities



Period End2020-03-312019-12-312019-03-312018-12-312016-12-312016-09-302015-12-312015-09-302014-12-312014-09-302013-03-312012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-31
Value2223-110000000000-40005
Percentage of PaymentsForProceedsFromOtherInvestingActivities100.0100.0100.0100.00.00.00.00.00.00.00.0100.0100.0100.00.00.00.0100.0

us-gaap:PaymentsOfFinancingCosts



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-03-312012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value150170112110001100000209070-909005000100000
Percentage of PaymentsOfFinancingCosts100.0100.0100.0100.0100.0100.0100.00.00.0100.0100.0100.00.00.00.00.0100.0100.0100.00.0100.00.0100.00.0100.00.0100.0100.00.00.00.0100.00.00.00.00.0

us-gaap:PreferredStockDividendsIncomeStatementImpact



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-30
Value275000.0275000.0275000.0275000.0275000.0275000.0275000.0275000.0275000.0274000.0276000.0217000.00.00.00.00.0
Percentage of PreferredStockDividendsIncomeStatementImpact100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.00.00.00.0

us-gaap:ProceedsFromEquityMethodInvestmentDividendsOrDistributionsReturnOfCapital



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-03-312012-03-31
Value61146313764876779624118689-3811464
Percentage of ProceedsFromEquityMethodInvestmentDividendsOrDistributionsReturnOfCapital100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ProceedsFromPaymentsForOtherFinancingActivities



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312012-03-312011-03-31
Value-200-3-1-52005-7000-13701-100
Percentage of ProceedsFromPaymentsForOtherFinancingActivities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0100.0100.00.0100.0

us-gaap:PublicUtilitiesAllowanceForFundsUsedDuringConstructionCapitalizedCostOfEquity



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-30
Value15191516124200000000000000011106593100000000
Percentage of PublicUtilitiesAllowanceForFundsUsedDuringConstructionCapitalizedCostOfEquity100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

dei:LegalEntity

us-gaap:RelatedPartyTransactionExpensesFromTransactionsWithRelatedParty

oke:UnconsolidatedAffiliates



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-312012-09-302012-06-30
Value454041404140373837403939363536343330282519181514141512798
Percentage of RelatedPartyTransactionExpensesFromTransactionsWithRelatedParty100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:RightOfUseAssetObtainedInExchangeForOperatingLeaseLiability



Period End2020-03-312019-03-31
Value970
Percentage of RightOfUseAssetObtainedInExchangeForOperatingLeaseLiability100.0100.0

us-gaap:StockIssuedDuringPeriodValueOther



Period End2020-03-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-312012-09-302012-06-302012-03-312011-09-302011-06-30
Value77116997118239269837495105835567442332914
Percentage of StockIssuedDuringPeriodValueOther100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:StatementEquityComponents

us-gaap:AdditionalPaidInCapital



Period End2020-03-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-03-312012-06-302012-03-312011-09-30
Value-946-244441169388663-2211-3-1-13-7202-24-261-298
Percentage of StockIssuedDuringPeriodValueOther-131.059.954.0-395.852.150.164.098.998.996.445.0-78.340.737.416.8-64.8-12.2-35.735.7-193.438.914.346.3-318.6-935.833.8-1139.381.7

us-gaap:CommonStock



Period End2020-03-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-03-312012-03-312011-09-30
Value0.00.00.00.00.00.00.0218000.073000.012000.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0
Percentage of StockIssuedDuringPeriodValueOther0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:TreasuryStock



Period End2020-03-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-03-312012-06-302012-03-312011-09-30
Value162531442134245428911751134331292311
Percentage of StockIssuedDuringPeriodValueOther231.040.146.0495.847.949.936.01.11.13.655.0178.359.362.683.2164.8112.2135.764.3293.461.185.753.7418.61035.866.21239.318.3

us-gaap:StockholdersEquityOther



Period End2020-03-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-312012-09-302012-06-302012-03-312011-09-302011-06-302011-03-312010-12-312010-09-30
Value-1777-45-116610-5-6-60-6-5-85-51-54-60-743-42-8-3398-2000000
Percentage of StockholdersEquityOther100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.00.00.00.0100.0

us-gaap:StatementEquityComponents

us-gaap:AdditionalPaidInCapital



Period End2020-03-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-03-312012-06-302012-03-31
Value-1777-45-116610-5-5-60-6-5-81-51-54-60-743-338-20
Percentage of StockholdersEquityOther100.0100.0100.0100.0100.0100.0100.0100.099.496.597.8100.0100.0100.0100.026.1101.970.899.2102.4100.0100.0100.0100.0100.0100.0100.0

us-gaap:RetainedEarnings



Period End2020-03-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-03-312012-06-302012-03-31
Value0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.099000.01000.0-1000.0-101000.00.00.00.00.00.00.00.0
Percentage of StockholdersEquityOther-0.00.00.0-0.0-0.00.00.00.0-0.0-0.0-0.0-0.0-0.0-0.0-0.00.0-1.90.10.0-2.4-0.00.0-0.00.0-0.00.0-0.0

us-gaap:TaxesExcludingIncomeAndExciseTaxes



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-312012-09-302012-06-30
Value312726303322242829222424272418242121172424151918222730192327
Percentage of TaxesExcludingIncomeAndExciseTaxes100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:WeightedAverageNumberDilutedSharesOutstandingAdjustment



Period End2020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-312017-09-302017-06-302017-03-312016-09-302016-06-302016-03-312015-09-302015-06-302015-03-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-312012-09-302012-06-302012-03-312011-09-302011-06-302011-03-312010-09-302010-06-30
Value111222222111000011132340000000
Percentage of WeightedAverageNumberDilutedSharesOutstandingAdjustment100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

oke:AccumulatedOtherComprehensiveIncomeLossCumulativeChangeinOtherComprehensiveIncomeLossfromEquityMethodInvestmentsEffectNetofTax



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-06-302016-03-312015-12-312014-12-31
Value-16-8-12-7-4-1421-1-1-100-3-200
Percentage of AccumulatedOtherComprehensiveIncomeLossCumulativeChangeinOtherComprehensiveIncomeLossfromEquityMethodInvestmentsEffectNetofTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0

oke:CommodityExchangesAndImbalances



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312009-12-31
Value13251926382922263838111393060383838303139647493828275905737163631051317494186
Percentage of CommodityExchangesAndImbalances100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

oke:CommodityExchangesAndImbalancesLiabilitiesCurrent



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302010-12-31
Value551041031001201101621361241641891141141421057774969194104171207216212227199201272213201201202236313288
Percentage of CommodityExchangesAndImbalancesLiabilitiesCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

oke:DerivativeCollateralRighttoReclaimCashTotal



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-31
Value08102006752184952113067
Percentage of DerivativeCollateralRighttoReclaimCashTotal0.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

oke:UnamortizedPortionofTerminatedSwaps



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-06-302015-12-31
Value14151515161617171818181919202121
Percentage of UnamortizedPortionofTerminatedSwaps100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:AccountsPayableRelatedPartiesCurrent



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312013-12-31
Value141313131414121212131312131111121189107206
Percentage of AccountsPayableRelatedPartiesCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:AccumulatedOtherComprehensiveIncomeLossCumulativeChangesInNetGainLossFromCashFlowHedgesEffectNetOfTax



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302010-12-312009-12-31
Value-354-233-294-211-145-64-45-61-53-81-85-77-39-52-70-74-49-42-43-40-42-37-40-43-38-43-35-36-53-55-72-43-22-55-35215-6
Percentage of AccumulatedOtherComprehensiveIncomeLossCumulativeChangesInNetGainLossFromCashFlowHedgesEffectNetOfTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:AccumulatedOtherComprehensiveIncomeLossDefinedBenefitPensionAndOtherPostretirementPlansNetOfTax



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302010-12-312009-12-31
Value127131114116119121116119122105959799101798182849295979968707279184177170162169-163-157-151139135125-113
Percentage of AccumulatedOtherComprehensiveIncomeLossDefinedBenefitPensionAndOtherPostretirementPlansNetOfTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:AdditionalPaidInCapital



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312009-12-31
Value698974037448749575277615766276997735658864186463123212341264129413271378147715641537154115151503137714331404127812671324133713261317141814041396138413921322
Percentage of AdditionalPaidInCapital100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ConsolidatedEntities

us-gaap:CommercialPaper

srt:ParentCompany



Period End2020-03-312019-12-312019-09-302019-06-302018-12-31
Value0220000
Percentage of CommercialPaper0.0100.00.00.00.0

us-gaap:ContractWithCustomerLiability



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312018-01-01
Value455745503131384200
Percentage of ContractWithCustomerLiability100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ContractWithCustomerLiabilityCurrent



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312018-01-01
Value1122253010152327619
Percentage of ContractWithCustomerLiabilityCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ContractWithCustomerLiabilityNoncurrent



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-31
Value333420202016
Percentage of ContractWithCustomerLiabilityNoncurrent100.0100.0100.0100.0100.0100.0

us-gaap:DebtInstrumentCarryingAmount



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312014-12-312013-12-312012-12-312011-12-31
Value142741281312595111471039994519023823680829198951896499667948988308832883484867194775665144875
Percentage of DebtInstrumentCarryingAmount100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ConsolidatedEntities, us-gaap:DebtInstrument

us-gaap:DebtInstrumentFaceAmount

srt:ParentCompany, oke:A2.2NotesPayabledue2025



Period End2020-03-31
Value400
Percentage of DebtInstrumentFaceAmount100.0

srt:ParentCompany, oke:A3.1NotesPayabledue2030



Period End2020-03-31
Value850
Percentage of DebtInstrumentFaceAmount212.5

srt:ParentCompany, oke:A4.5NotesPayabledue2050



Period End2020-03-31
Value500
Percentage of DebtInstrumentFaceAmount125.0

us-gaap:ConsolidatedEntities, us-gaap:LongtermDebtType

srt:ParentCompany, oke:TermLoanAgreementdue2021



Period End2020-03-31
Value1500
Percentage of DebtInstrumentFaceAmount375.0

us-gaap:DebtInstrumentUnamortizedDiscountPremiumAndDebtIssuanceCostsNet



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302015-12-31
Value135121123101103878773757880636668707274
Percentage of DebtInstrumentUnamortizedDiscountPremiumAndDebtIssuanceCostsNet100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DerivativeAssetCollateralObligationToReturnCashOffset



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302015-12-31
Value6600000000000000034
Percentage of DerivativeAssetCollateralObligationToReturnCashOffset100.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0100.0

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us-gaap:DerivativeAssetFairValueGrossAssetIncludingNotSubjectToMasterNettingArrangement

oke:FinancialContracts, us-gaap:FairValueInputsLevel1, us-gaap:FairValueMeasurementsRecurring



Period End2020-03-312019-12-31
Value3710
Percentage of DerivativeAssetFairValueGrossAssetIncludingNotSubjectToMasterNettingArrangement100.0100.0

oke:FinancialContracts, us-gaap:FairValueInputsLevel3, us-gaap:FairValueMeasurementsRecurring



Period End2020-03-312019-12-31
Value13055
Percentage of DerivativeAssetFairValueGrossAssetIncludingNotSubjectToMasterNettingArrangement346.5510.1

us-gaap:DerivativeInstrumentRisk, us-gaap:FairValueByMeasurementBasis, us-gaap:FairValueByMeasurementFrequency

oke:FinancialContracts, us-gaap:EstimateOfFairValueFairValueDisclosure, us-gaap:FairValueMeasurementsRecurring



Period End2020-03-312019-12-31
Value16766
Percentage of DerivativeAssetFairValueGrossAssetIncludingNotSubjectToMasterNettingArrangement446.5610.1

us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FairValueByMeasurementFrequency

us-gaap:FairValueInputsLevel1, us-gaap:FairValueMeasurementsRecurring



Period End2020-03-312019-12-31
Value3710
Percentage of DerivativeAssetFairValueGrossAssetIncludingNotSubjectToMasterNettingArrangement100.0100.0

us-gaap:FairValueInputsLevel2, us-gaap:FairValueMeasurementsRecurring



Period End2020-03-312019-12-31
Value0.0581000.0
Percentage of DerivativeAssetFairValueGrossAssetIncludingNotSubjectToMasterNettingArrangement0.05.3

us-gaap:FairValueInputsLevel3, us-gaap:FairValueMeasurementsRecurring



Period End2020-03-312019-12-31
Value13055
Percentage of DerivativeAssetFairValueGrossAssetIncludingNotSubjectToMasterNettingArrangement346.5510.1

us-gaap:FairValueByMeasurementBasis, us-gaap:FairValueByMeasurementFrequency

us-gaap:EstimateOfFairValueFairValueDisclosure, us-gaap:FairValueMeasurementsRecurring



Period End2020-03-312019-12-31
Value16767
Percentage of DerivativeAssetFairValueGrossAssetIncludingNotSubjectToMasterNettingArrangement446.5615.4

us-gaap:DerivativeInstrumentRisk, us-gaap:FairValueByMeasurementFrequency

us-gaap:DerivativeAssetFairValueGrossLiabilityAndObligationToReturnCashOffset

oke:FinancialContracts, us-gaap:FairValueMeasurementsRecurring



Period End2020-03-312019-12-312019-09-302019-06-302018-12-31
Value14028403832
Percentage of DerivativeAssetFairValueGrossLiabilityAndObligationToReturnCashOffset100.0100.0100.0100.0100.0

us-gaap:FairValueByMeasurementFrequency

us-gaap:FairValueMeasurementsRecurring



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302015-12-31
Value1402840382732542423241715174742
Percentage of DerivativeAssetFairValueGrossLiabilityAndObligationToReturnCashOffset100.0100.0100.0100.00.0100.00.00.00.00.00.00.00.00.00.00.0

us-gaap:DerivativeInstrumentRisk, us-gaap:FairValueByMeasurementFrequency

us-gaap:DerivativeAssets

oke:FinancialContracts, us-gaap:FairValueMeasurementsRecurring



Period End2020-03-312019-12-31
Value2737
Percentage of DerivativeAssets100.0100.0

us-gaap:FairValueByMeasurementFrequency

us-gaap:FairValueMeasurementsRecurring



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312011-12-31
Value2738402976750298349453949484629722313029302740606169305161
Percentage of DerivativeAssets100.0101.50.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:BalanceSheetLocation, us-gaap:DerivativeInstrumentRisk, us-gaap:HedgingDesignation, oke:DerivativeInstrumentContractTypeBySubtype

us-gaap:DerivativeFairValueOfDerivativeAsset

us-gaap:OtherCurrentAssets, us-gaap:CommodityContract, us-gaap:DesignatedAsHedgingInstrument, oke:FinancialDerivativeInstrument



Period End2020-03-312019-12-312019-09-302019-06-302018-12-31
Value16764726278
Percentage of DerivativeFairValueOfDerivativeAsset100.0100.0100.0100.0100.0

us-gaap:OtherLiabilities, us-gaap:CommodityContract, us-gaap:DesignatedAsHedgingInstrument, oke:FinancialDerivativeInstrument



Period End2020-03-312019-12-31
Value01
Percentage of DerivativeFairValueOfDerivativeAsset0.02.5

us-gaap:HedgingDesignation

us-gaap:DesignatedAsHedgingInstrument



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302011-12-31
Value16767806735100100481036656516148914554250444855332942637779335881136184
Percentage of DerivativeFairValueOfDerivativeAsset100.0103.3110.8107.80.0126.90.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:BalanceSheetLocation, us-gaap:DerivativeInstrumentRisk, us-gaap:HedgingDesignation

us-gaap:DerivativeFairValueOfDerivativeLiability

us-gaap:OtherCurrentLiabilities, us-gaap:InterestRateContract, us-gaap:DesignatedAsHedgingInstrument



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312015-12-31
Value28901483415000001611129
Percentage of DerivativeFairValueOfDerivativeLiability100.0100.0100.0100.0100.0100.00.00.00.00.00.0100.0100.0100.0100.0

us-gaap:OtherLiabilities, us-gaap:InterestRateContract, us-gaap:DesignatedAsHedgingInstrument



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-31
Value24111126217314584051100000
Percentage of DerivativeFairValueOfDerivativeLiability842.7124.01787.0209.33081.7561.20.00.00.00.00.00.00.00.0

us-gaap:BalanceSheetLocation, us-gaap:DerivativeInstrumentRisk, us-gaap:HedgingDesignation, oke:DerivativeInstrumentContractTypeBySubtype

us-gaap:OtherCurrentAssets, us-gaap:CommodityContract, us-gaap:DesignatedAsHedgingInstrument, oke:FinancialDerivativeInstrument



Period End2020-03-312019-12-312019-09-302019-06-302018-12-31
Value7326363631
Percentage of DerivativeFairValueOfDerivativeLiability257.329.9246.644.1211.8

us-gaap:OtherLiabilities, us-gaap:CommodityContract, us-gaap:DesignatedAsHedgingInstrument, oke:FinancialDerivativeInstrument



Period End2020-03-312019-12-312018-12-31
Value020
Percentage of DerivativeFairValueOfDerivativeLiability0.02.96.3

us-gaap:HedgingDesignation

us-gaap:DesignatedAsHedgingInstrument



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302013-12-312012-12-31
Value344231317295177131986232514031386792100481118713452629145
Percentage of DerivativeFairValueOfDerivativeLiability1200.0256.82162.5356.13757.7879.30.00.00.00.00.0185.0340.8530.70.00.00.0114.50.00.00.00.00.00.00.00.0

us-gaap:DerivativeInstrumentRisk, us-gaap:FairValueByMeasurementFrequency

us-gaap:DerivativeLiabilities

oke:FinancialContracts, us-gaap:FairValueMeasurementsRecurring



Period End2020-03-312019-12-31
Value01
Percentage of DerivativeLiabilities0.0100.0

us-gaap:FairValueByMeasurementFrequency

us-gaap:FairValueMeasurementsRecurring



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312013-09-302013-06-302013-03-312012-12-312011-12-31
Value270202276257149992712441813157275439130944501010139
Percentage of DerivativeLiabilities0.020133.80.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:DerivativeInstrumentRisk, us-gaap:FairValueByMeasurementFrequency

us-gaap:DerivativeLiabilityFairValueGrossAssetAndRightToReclaimCashOffset

oke:FinancialContracts, us-gaap:FairValueMeasurementsRecurring



Period End2020-03-312019-12-312019-09-302019-06-302018-12-31
Value7328403832
Percentage of DerivativeLiabilityFairValueGrossAssetAndRightToReclaimCashOffset100.0100.0100.0100.0100.0

us-gaap:FairValueByMeasurementFrequency

us-gaap:FairValueMeasurementsRecurring



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302015-12-31
Value73284038273210060235343162956228
Percentage of DerivativeLiabilityFairValueGrossAssetAndRightToReclaimCashOffset100.0100.0100.0100.00.0100.00.00.00.00.00.00.00.00.00.00.0

us-gaap:DerivativeInstrumentRisk, us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FairValueByMeasurementFrequency

us-gaap:DerivativeLiabilityFairValueGrossLiabilityIncludingNotSubjectToMasterNettingArrangement

oke:FinancialContracts, us-gaap:FairValueInputsLevel1, us-gaap:FairValueMeasurementsRecurring



Period End2020-03-312019-12-31
Value04
Percentage of DerivativeLiabilityFairValueGrossLiabilityIncludingNotSubjectToMasterNettingArrangement100.0100.0

oke:FinancialContracts, us-gaap:FairValueInputsLevel3, us-gaap:FairValueMeasurementsRecurring



Period End2020-03-312019-12-31
Value7224
Percentage of DerivativeLiabilityFairValueGrossLiabilityIncludingNotSubjectToMasterNettingArrangement7999.0515.2

us-gaap:DerivativeInstrumentRisk, us-gaap:FairValueByMeasurementBasis, us-gaap:FairValueByMeasurementFrequency

oke:FinancialContracts, us-gaap:EstimateOfFairValueFairValueDisclosure, us-gaap:FairValueMeasurementsRecurring



Period End2020-03-312019-12-31
Value7329
Percentage of DerivativeLiabilityFairValueGrossLiabilityIncludingNotSubjectToMasterNettingArrangement8099.1615.2

us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FairValueByMeasurementFrequency

us-gaap:FairValueInputsLevel1, us-gaap:FairValueMeasurementsRecurring



Period End2020-03-312019-12-31
Value04
Percentage of DerivativeLiabilityFairValueGrossLiabilityIncludingNotSubjectToMasterNettingArrangement100.0100.0

us-gaap:FairValueInputsLevel2, us-gaap:FairValueMeasurementsRecurring



Period End2020-03-312019-12-31
Value270201
Percentage of DerivativeLiabilityFairValueGrossLiabilityIncludingNotSubjectToMasterNettingArrangement29670.44197.5

us-gaap:FairValueInputsLevel3, us-gaap:FairValueMeasurementsRecurring



Period End2020-03-312019-12-31
Value7224
Percentage of DerivativeLiabilityFairValueGrossLiabilityIncludingNotSubjectToMasterNettingArrangement7999.0515.2

us-gaap:FairValueByMeasurementBasis, us-gaap:FairValueByMeasurementFrequency

us-gaap:EstimateOfFairValueFairValueDisclosure, us-gaap:FairValueMeasurementsRecurring



Period End2020-03-312019-12-31
Value344231
Percentage of DerivativeLiabilityFairValueGrossLiabilityIncludingNotSubjectToMasterNettingArrangement37769.54812.7

us-gaap:DerivativeInstrumentRisk, us-gaap:HedgingDesignation, oke:DerivativeInstrumentByMethodForSettingNotionalAmount, oke:DerivativePositonByTransactionType, oke:DerivativesByCommodity

us-gaap:DerivativeNonmonetaryNotionalAmount

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Period End2020-03-312019-12-312019-09-302018-12-31
Value-47600.0-59000.0-39600.0-29900.0
Percentage of DerivativeNonmonetaryNotionalAmount100.0100.0100.0100.0

oke:Futuresandswaps, us-gaap:DesignatedAsHedgingInstrument, oke:FixedPrice, oke:Sellor, srt:NaturalGasReserves



Period End2020-03-312019-12-312019-09-302018-12-31
Value-47600.0-59000.0-39600.0-29900.0
Percentage of DerivativeNonmonetaryNotionalAmount100.0100.0100.0100.0

oke:Futuresforwardsandswaps, us-gaap:DesignatedAsHedgingInstrument, oke:FixedPrice, oke:Purchasor, srt:CrudeOilAndNGLPerBarrel



Period End2020-03-312019-12-312019-09-302018-12-31
Value10.57.99.26.5
Percentage of DerivativeNonmonetaryNotionalAmount-0.0-0.0-0.0-0.0

oke:Futuresforwardsandswaps, us-gaap:DesignatedAsHedgingInstrument, oke:FixedPrice, oke:Sellor, srt:CrudeOilAndNGLPerBarrel



Period End2020-03-312019-12-312019-09-302018-12-31
Value-17.5-17.4-20.1-13.8
Percentage of DerivativeNonmonetaryNotionalAmount0.00.00.10.0

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us-gaap:DerivativeNotionalAmount

us-gaap:ForwardContracts, us-gaap:CashFlowHedging, oke:ForecastedDebtIssuances, us-gaap:InterestRateContract



Period End2020-03-312019-12-312019-09-302018-12-31
Value1100180018003000
Percentage of DerivativeNotionalAmount100.0100.0100.0100.0

us-gaap:DerivativeInstrumentRisk, us-gaap:HedgingDesignation, oke:DerivativePositonByTransactionType

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Period End2020-03-312019-12-312019-09-302018-12-31
Value2400310031004300
Percentage of DerivativeNotionalAmount218.2172.2172.2143.3

us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName, oke:ReportableSegmentByName

us-gaap:EquityMethodInvestmentOwnershipPercentage

oke:ChisholmPipelineCompany, oke:NaturalGasLiquids



Period End2020-03-31
Value0.5
Percentage of EquityMethodInvestmentOwnershipPercentage100.0

oke:VeniceEnergyServicesCompany, oke:NaturalGasGatheringAndProcessing



Period End2020-03-31
Value0.102
Percentage of EquityMethodInvestmentOwnershipPercentage20.4

us-gaap:EquityMethodInvestments



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302009-12-31
Value81086187088195096998198699710031013944956958943913929948113711461124113211281212122912291201120812201221121812101219122312241177118611881194757765
Percentage of EquityMethodInvestments100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:StatementBusinessSegments

oke:NaturalGasGatheringAndProcessing



Period End2020-03-312019-12-312019-03-312018-12-312017-12-312016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-31
Value434394255687373253252255254253329333333331332335333
Percentage of EquityMethodInvestments0.54.04.24.45.67.57.97.822.322.022.722.522.527.227.127.127.627.527.527.3

oke:NaturalGasLiquids



Period End2020-03-312019-12-312019-03-312018-12-312017-12-312016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-31
Value435439447451457471474482484485483490484485489491494494496494
Percentage of EquityMethodInvestments53.751.047.046.545.651.651.150.942.642.343.043.342.940.139.840.041.240.940.740.5

oke:NaturalGasPipelines



Period End2020-03-312019-12-312019-03-312018-12-312017-12-312016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-31
Value371388463475489373380391399408385387390396406404376381388393
Percentage of EquityMethodInvestments45.845.048.849.148.840.941.041.335.135.634.334.234.632.733.132.931.331.531.832.2

oke:TotalSegments



Period End2020-03-312019-12-312019-03-312018-12-312017-12-31
Value8108619509691003
Percentage of EquityMethodInvestments100.0100.0100.0100.0100.0

us-gaap:FairValueNetDerivativeAssetLiabilityMeasuredOnRecurringBasisWithUnobservableInputs



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-31
Value573028191140-31-233-32-2600-23-10-140751079
Percentage of FairValueNetDerivativeAssetLiabilityMeasuredOnRecurringBasisWithUnobservableInputs100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:InterestPayableCurrent



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302014-12-312014-09-302014-06-302014-03-312013-12-31
Value121190122166113161111135971359711190112104119104129108104102105102109
Percentage of InterestPayableCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DerivativeInstrumentRisk, us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FairValueByMeasurementFrequency

us-gaap:InterestRateDerivativeLiabilitiesAtFairValue

us-gaap:InterestRateContract, us-gaap:FairValueInputsLevel2, us-gaap:FairValueMeasurementsRecurring



Period End2020-03-312019-12-31
Value270201
Percentage of InterestRateDerivativeLiabilitiesAtFairValue100.0100.0

us-gaap:DerivativeInstrumentRisk, us-gaap:FairValueByMeasurementBasis, us-gaap:FairValueByMeasurementFrequency

us-gaap:InterestRateContract, us-gaap:EstimateOfFairValueFairValueDisclosure, us-gaap:FairValueMeasurementsRecurring



Period End2020-03-312019-12-31
Value270201
Percentage of InterestRateDerivativeLiabilitiesAtFairValue100.0100.0

us-gaap:DerivativeInstrumentRisk, us-gaap:FairValueByMeasurementFrequency

us-gaap:InterestRateContract, us-gaap:FairValueMeasurementsRecurring



Period End2020-03-312019-12-31
Value270201
Percentage of InterestRateDerivativeLiabilitiesAtFairValue100.0100.0

us-gaap:InvestmentsAndOtherNoncurrentAssets



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302012-12-31
Value18511993200520142073206621422176226323832667267821352137208520572073209622762311231923342357245424863039295729732976
Percentage of InvestmentsAndOtherNoncurrentAssets100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:LiabilitiesOtherThanLongtermDebtNoncurrent



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302012-12-31
Value11701086107091179867048241142040141541119461953187918221770171717361753175117131575154314342410254025072294
Percentage of LiabilitiesOtherThanLongtermDebtNoncurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:LongTermDebtFairValue



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302012-12-31
Value1190013800137001210011000960093008500870093009300910089008800930090008300740081008100830075007900800078008200810069007500
Percentage of LongTermDebtFairValue100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:MaterialsSuppliesAndOther



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302014-12-31
Value2552011921771631411281139890777560818583766255
Percentage of MaterialsSuppliesAndOther100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

oke:LeaseDescription

us-gaap:OperatingLeaseLiability

oke:CertainOperatingLeasesEnteredIntoDuringThePeriod



Period End2020-03-31
Value17
Percentage of OperatingLeaseLiability100.0

oke:LeaseremainingbalancerelatedtoleaseenteredinDecember2019MemberMember



Period End2020-03-31
Value74
Percentage of OperatingLeaseLiability431.4

oke:MaturityofOperatingLeaseLiabilities



Period End2020-03-312019-12-312019-09-302019-06-302019-03-31
Value10915161716
Percentage of OperatingLeaseLiability639.00.00.00.00.0

us-gaap:OperatingLeaseLiabilityCurrent



Period End2020-03-312019-12-31
Value131
Percentage of OperatingLeaseLiabilityCurrent100.0100.0

us-gaap:OperatingLeaseLiabilityNoncurrent



Period End2020-03-312019-12-31
Value9613
Percentage of OperatingLeaseLiabilityNoncurrent100.0100.0

us-gaap:PreferredStockParOrStatedValuePerShare



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302016-12-31
Value0.010.010.010.010.010.010.010.010.010.010.010.010.0
Percentage of PreferredStockParOrStatedValuePerShare100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0

us-gaap:PreferredStockSharesIssued



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302016-12-31
Value20000.020000.020000.020000.020000.020000.020000.020000.020000.020000.020000.020000.00.0
Percentage of PreferredStockSharesIssued100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0

us-gaap:RevenueRemainingPerformanceObligation



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value183118221904195319281891196019521947
Percentage of RevenueRemainingPerformanceObligation100.0100.0100.0100.0100.0100.0100.0100.0100.0

oke:RevenueRemainingPerformanceObligation

oke:A2020



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value257343335326296256245226215
Percentage of RevenueRemainingPerformanceObligation14.018.817.616.715.413.512.511.611.1

oke:A2021



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value305290286279264242237219209
Percentage of RevenueRemainingPerformanceObligation16.715.915.014.313.712.812.111.210.8

oke:A2022



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-31
Value230214228226202192
Percentage of RevenueRemainingPerformanceObligation12.611.812.011.610.510.2

oke:A2023



Period End2020-03-312019-12-31
Value184166
Percentage of RevenueRemainingPerformanceObligation10.19.1

oke:Thereafter



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value853807952937907892109010661032
Percentage of RevenueRemainingPerformanceObligation46.644.350.048.047.147.255.754.653.0

us-gaap:DebtInstrument

us-gaap:SeniorLongTermNotes

oke:NotesPayablefromPublicOfferingDue20252030and2050



Period End2020-03-31
Value1750
Percentage of SeniorLongTermNotes100.0

us-gaap:ShortTermBorrowings



Period End2020-03-312019-12-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302012-12-31
Value022001201560614932127412901110693576444546287870825105500125564562834817
Percentage of ShortTermBorrowings0.0100.00.0100.0100.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.00.0100.0100.0100.0100.0100.0

us-gaap:ConsolidatedEntities

us-gaap:ShortTermDebtWeightedAverageInterestRate

srt:ParentCompany



Period End2020-03-312019-12-312018-12-31
Value0.00.02160.0
Percentage of ShortTermDebtWeightedAverageInterestRate0.0100.00.0

us-gaap:TreasuryStockShares



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312009-12-31
Value313131323233333333343434343535353536363637373737373939393940414018191919151616
Percentage of TreasuryStockShares100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Line plots across dimensions of each concept

us-gaap:SharesIssued us-gaap:StatementEquityComponents


us-gaap:Revenues us-gaap:StatementBusinessSegments


us-gaap:Revenues us-gaap:ProductOrService


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


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


us-gaap:CostOfRevenue us-gaap:StatementBusinessSegments


us-gaap:Assets us-gaap:StatementBusinessSegments


us-gaap:StockholdersEquity us-gaap:StatementEquityComponents


us-gaap:Goodwill oke:ReportableSegmentByName


us-gaap:StockholdersEquity us-gaap:StatementEquityComponents


us-gaap:DepreciationDepletionAndAmortization us-gaap:StatementBusinessSegments


us-gaap:PaymentsToAcquirePropertyPlantAndEquipment us-gaap:StatementBusinessSegments