OKE


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

Table of contents



us-gaap:CommonStockValue

us-gaap:PreferredStockParOrStatedValuePerShare
us-gaap:StatementEquityComponents
us-gaap:SharesIssued

us-gaap:CommonStockSharesIssued

us-gaap:PreferredStockSharesIssued

us-gaap:CommonStockSharesAuthorized

us-gaap:CommonStockSharesOutstanding

us-gaap:WeightedAverageNumberOfDilutedSharesOutstanding

us-gaap:WeightedAverageNumberOfSharesOutstandingBasic

us-gaap:EarningsPerShareBasic

us-gaap:EarningsPerShareDiluted

us-gaap:ComprehensiveIncomeNetOfTax

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

us-gaap:GainsLossesOnExtinguishmentOfDebt

us-gaap:IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest

us-gaap:IncomeTaxExpenseBenefit

us-gaap:InterestExpense

us-gaap:NetIncomeLossAvailableToCommonStockholdersBasic

us-gaap:OperatingIncomeLoss

us-gaap:OtherComprehensiveIncomeLossNetOfTax
us-gaap:StatementEquityComponents

us-gaap:PreferredStockDividendsIncomeStatementImpact

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

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

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
oke:PropertyPlantAndEquipmentRegulatedAndNonRegulated, us-gaap:PropertyPlantAndEquipmentByType

us-gaap:AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment
oke:LeaseDescription
oke:PropertyPlantAndEquipmentRegulatedAndNonRegulated

us-gaap:PropertyPlantAndEquipmentNet

us-gaap:Goodwill
oke:ReportableSegmentByName

us-gaap:IntangibleAssetsNetExcludingGoodwill

us-gaap:IntangibleAssetsNetIncludingGoodwill
oke:LeaseDescription
us-gaap:OperatingLeaseRightOfUseAsset

us-gaap:OtherAssetsNoncurrent

us-gaap:AccountsPayableCurrent

us-gaap:ContractWithCustomerLiabilityCurrent

us-gaap:LiabilitiesCurrent

us-gaap:LongTermDebtCurrent

us-gaap:OperatingLeaseLiabilityCurrent
oke:LeaseDescription

us-gaap:OtherLiabilitiesCurrent

us-gaap:TaxesPayableCurrent

us-gaap:LongTermDebt

us-gaap:LongTermDebtNoncurrent

us-gaap:DeferredTaxLiabilitiesNoncurrent
us-gaap:RetirementPlanType
us-gaap:PensionAndOtherPostretirementDefinedBenefitPlansLiabilitiesNoncurrent

us-gaap:OtherLiabilitiesNoncurrent

us-gaap:OperatingLeaseLiabilityNoncurrent
oke:LeaseDescription
oke:LeaseDescription
us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearTwo
oke:LeaseDescription
us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearThree
oke:LeaseDescription
us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearFour
oke:LeaseDescription
us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearFive
oke:LeaseDescription
us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueAfterYearFive
oke:LeaseDescription
us-gaap:OperatingLeaseLiability
oke:LeaseDescription
us-gaap:LesseeOperatingLeaseLiabilityPaymentsDue
oke:LeaseDescription
us-gaap:LesseeOperatingLeaseLiabilityUndiscountedExcessAmount

us-gaap:StockholdersEquity
us-gaap:StatementEquityComponents

us-gaap:StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest
us-gaap:StatementEquityComponents

us-gaap:CommonStockValue

us-gaap:AdditionalPaidInCapital

us-gaap:AccumulatedOtherComprehensiveIncomeLossNetOfTax

us-gaap:TreasuryStockValue

us-gaap:NetCashProvidedByUsedInOperatingActivities

us-gaap:NetCashProvidedByUsedInInvestingActivities

us-gaap:NetCashProvidedByUsedInFinancingActivities

us-gaap:CashAndCashEquivalentsPeriodIncreaseDecrease

us-gaap:DeferredIncomeTaxExpenseBenefit

us-gaap:DepreciationDepletionAndAmortization
us-gaap:StatementBusinessSegments

us-gaap:IncreaseDecreaseInAccountsPayable

us-gaap:IncreaseDecreaseInInventories

us-gaap:IncreaseDecreaseInOtherOperatingCapitalNet

us-gaap:NetCashProvidedByUsedInOperatingActivities

us-gaap:ProfitLoss
us-gaap:StatementEquityComponents

us-gaap:NetCashProvidedByUsedInInvestingActivities

us-gaap:PaymentsToAcquirePropertyPlantAndEquipment
us-gaap:StatementBusinessSegments

us-gaap:NetCashProvidedByUsedInFinancingActivities

us-gaap:ProceedsFromIssuanceOfLongTermDebt

us-gaap:RepaymentsOfLongTermDebt

us-gaap:PaymentsOfDividends

us-gaap:DeferredTaxLiabilities

us-gaap:DeferredTaxAssetsNet

us-gaap:ProceedsFromRepaymentsOfShortTermDebt
us-gaap:StatementBusinessSegments
oke:AdjustedEBITDA
dei:LegalEntity
oke:AggregateAmountOfCommonSharesAvailableForIssuanceAndSaleUnderEquityDistributionAgreement
us-gaap:SubsequentEventType
oke:CommonStockDividendsPerShareDeclaredAnnualized

oke:ContractwithCustomerLiabilityNetAdditions
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
oke:ReportableSegmentByName, us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName
oke:ImpairmentOfEquityMethodInvestmentDifferenceBetweenCarryingAmountAndUnderlyingEquity

oke:Impairmentoflonglivedassetsgoodwillandotherassetimpairmentcharges

oke:IncreaseDecreaseInCommodityExchangesAndImbalancesNet

oke:LongtermDebtRepurchasedFaceAmount

oke:NotionalAmountOfCashFlowHedgeInstrumentsSettled

oke:OtherComprehensiveIncomeLossAmountAttributabletoEquityMethodInvestmentsbeforeReclassificationAdjustmentsNetofTax

oke:OtherComprehensiveIncomeLossBeforeReclassifications

oke:OtherComprehensiveIncomeLossPortionAttributabletoEquityMethodInvestmentsNetofTax

oke:OtherComprehensiveIncomeLossPortionAttributabletoEquityMethodInvestmentsNetofTaxAttributabletoParent

oke:OtherComprehensiveIncomeLossPortionAttributabletoEquityMethodInvestmentsTax

oke:OtherComprehensiveIncomeLossReclassificationAdjustmentIncludedInNetIncomeNetOfTax

oke:OtherComprehensiveIncomeLossReclassificationAdjustmentfromAOCIforOtherComprehensiveIncomeAttributabletoEquityMethodInvestmentsNetofTax

oke:OtherCorporateCostsandNoncashItems
us-gaap:StatementBusinessSegments
oke:PublicUtilitiesAllowanceforFundsUsedDuringConstructionCapitalizedCostofEquityandOther

oke:RealizedLossonSettledInterestRateSwapsRecordedinAOCI

us-gaap:AssetImpairmentCharges
us-gaap:StatementBusinessSegments

us-gaap:BusinessCombinationConsiderationTransferred1
us-gaap:SubsequentEventType

us-gaap:CommonStockDividendsPerShareCashPaid
us-gaap:SubsequentEventType
us-gaap:CommonStockDividendsPerShareDeclared

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

us-gaap:DirectOperatingCosts
us-gaap:StatementBusinessSegments

us-gaap:DividendsCommonStock
us-gaap:StatementEquityComponents

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

us-gaap:DividendsPreferredStockCash

us-gaap:EmployeeBenefitsAndShareBasedCompensationNoncash

us-gaap:EquityMethodInvestmentDividendsOrDistributions

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

us-gaap:FairValueNetDerivativeAssetLiabilityMeasuredOnRecurringBasisUnobservableInputsReconciliationGainLossIncludedInOtherComprehensiveIncomeLoss

us-gaap:FairValueNetDerivativeAssetLiabilityMeasuredOnRecurringBasisUnobservableInputsReconciliationSettlements

us-gaap:FairValueNetDerivativeAssetLiabilityMeasuredOnRecurringBasisUnobservableInputsReconciliationTransfersIntoLevel3

us-gaap:FinanceLeasePrincipalPayments

us-gaap:GainLossOnSaleOfPropertyPlantEquipment
oke:ReportableSegmentByName
us-gaap:GoodwillImpairmentLoss
oke:ReportableSegmentByName
us-gaap:ImpairmentOfLongLivedAssetsHeldForUse

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

us-gaap:IncreaseDecreaseInDerivativeAssetsAndLiabilities

us-gaap:IncreaseDecreaseInInterestPayableNet

us-gaap:IncreaseDecreaseInReceivables

us-gaap:InterestCostsCapitalized

us-gaap:NetIncomeLossAttributableToParentDiluted

us-gaap:OperatingLeasePayments

us-gaap:OtherComprehensiveIncomeLossCashFlowHedgeGainLossBeforeReclassificationAfterTax

us-gaap:OtherComprehensiveIncomeLossCashFlowHedgeGainLossBeforeReclassificationTax

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

us-gaap:OtherComprehensiveIncomeLossCashFlowHedgeGainLossReclassificationTax

us-gaap:OtherComprehensiveIncomeLossDerivativesQualifyingAsHedgesNetOfTax

us-gaap:OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent

us-gaap:OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentBeforeReclassificationAdjustmentsNetOfTax

us-gaap:OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentNetOfTax

us-gaap:OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansTax

us-gaap:OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetGainLossTax

us-gaap:OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansNetOfTax

us-gaap:OtherCostAndExpenseOperating

us-gaap:OtherNonoperatingExpense

us-gaap:OtherNonoperatingIncome

us-gaap:OtherOperatingActivitiesCashFlowStatement

us-gaap:PaymentsForProceedsFromOtherInvestingActivities

us-gaap:PaymentsOfFinancingCosts
us-gaap:StatementClassOfStock
us-gaap:PreferredStockDividendRatePercentage

us-gaap:ProceedsFromEquityMethodInvestmentDividendsOrDistributionsReturnOfCapital

us-gaap:ProceedsFromIssuanceOfCommonStock

us-gaap:ProceedsFromPaymentsForOtherFinancingActivities

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

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

us-gaap:RightOfUseAssetObtainedInExchangeForOperatingLeaseLiability

us-gaap:StockIssuedDuringPeriodValueOther
us-gaap:StatementEquityComponents

us-gaap:StockholdersEquityOther
us-gaap:StatementEquityComponents

us-gaap:TaxesExcludingIncomeAndExciseTaxes

us-gaap:WeightedAverageNumberDilutedSharesOutstandingAdjustment

oke:AccumulatedOtherComprehensiveIncomeLossCumulativeChangeinOtherComprehensiveIncomeLossfromEquityMethodInvestmentsEffectNetofTax
us-gaap:DerivativeInstrumentRisk, us-gaap:DerivativeInstrumentsGainLossByHedgingRelationship
oke:AmountOfAccumulatedOtherComprehensiveIncomeLossAttributablePrimarilyToSettledInterestRateSwaps
us-gaap:DerivativeInstrumentRisk, us-gaap:DerivativeInstrumentsGainLossByHedgingRelationship
oke:Amountofaccumulatedothercomprehensiveincomelossattributableprimarilytoforwardstartinginterestrateswaps.
us-gaap:DerivativeInstrumentRisk, us-gaap:DerivativeInstrumentsGainLossByHedgingRelationship
oke:CommodityCashFlowHedgeGainLossToBeReclassifiedAfterNext12MonthsNet

oke:CommodityExchangesAndImbalances

oke:CommodityExchangesAndImbalancesLiabilitiesCurrent

oke:DerivativeCollateralRighttoReclaimCashTotal
us-gaap:AwardType
oke:EmployeeParticipationInPlanInHundredths

oke:ForfeitureRateMaximumInHundredths
us-gaap:LineOfCreditFacility, us-gaap:SubsequentEventType
oke:IndebtednessToAdjustedEBITDAFromAcquisitionsMaximum
us-gaap:LineOfCreditFacility
oke:IndebtednessToAdjustedEbitdaCurrent
oke:LeaseDescription
oke:LeaseLiabilities
oke:LeaseDescription
oke:LeasedAssets
us-gaap:LineOfCreditFacility
oke:LineOfCreditFacilityOptionToIncreaseBorrowingCapacity
us-gaap:LineOfCreditFacility
oke:LineOfCreditFacilitySublimit
us-gaap:LineOfCreditFacility
oke:LineofCreditFacilitySwinglineSubfacility
us-gaap:AwardType
oke:MaximumAllowablePercentageOfAnnualBasePayWithheldToPurchaseOurCommonStock
us-gaap:DefinedBenefitPlanByPlanAssetCategories, us-gaap:RetirementPlanType
oke:NetProceedsFromExitOfAnInvestmentInAnInsuranceContract
us-gaap:AwardType
oke:PurchasePricePercentageOfLowerOfItsGrantDateOrExerciseDateMarketPriceInHundredths
us-gaap:ConsolidatedEntities, us-gaap:DebtInstrument
oke:SeniorNoteCovenantAccelerationOfIndebtedness
us-gaap:ConsolidatedEntities, us-gaap:DebtInstrument
oke:SeniorNoteCovenantRedemptionPriceUponEventOfDefault

oke:SeniorNoteCovenantTrusteeOrHoldersPercentageRequiredUponEventOfDefault

oke:UnamortizedPortionofTerminatedSwaps
us-gaap:DerivativeInstrumentRisk, us-gaap:DerivativeInstrumentsGainLossByHedgingRelationship
oke:UnrealizedGainLossOnCashFlowHedgesNetOfTaxAccumulatedOtherComprehensiveIncomeLoss

oke:UnrecordedPurchaseObligationDueAfterFiveYears

oke:UnrecordedPurchaseObligationDueCurrent

oke:UnrecordedPurchaseObligationDueInFourYears

oke:UnrecordedPurchaseObligationDueInThreeYears

oke:UnrecordedPurchaseObligationDueInTwoYears

oke:UnrecordedPurchaseObligationTotal

oke:Unrecordedpurchaseobligationdueinfiveyears

us-gaap:AccountsPayableRelatedPartiesCurrent

us-gaap:AccumulatedOtherComprehensiveIncomeLossCumulativeChangesInNetGainLossFromCashFlowHedgesEffectNetOfTax

us-gaap:AccumulatedOtherComprehensiveIncomeLossDefinedBenefitPensionAndOtherPostretirementPlansNetOfTax
us-gaap:RetirementPlanType

us-gaap:ContractWithCustomerLiability

us-gaap:ContractWithCustomerLiabilityNoncurrent

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

us-gaap:DebtInstrumentUnamortizedDiscountPremiumAndDebtIssuanceCostsNet

us-gaap:DeferredIncomeTaxLiabilities

us-gaap:DeferredTaxAssetsGross

us-gaap:DeferredTaxAssetsOperatingLossCarryforwards

us-gaap:DeferredTaxAssetsOperatingLossCarryforwardsStateAndLocal

us-gaap:DeferredTaxAssetsOther

us-gaap:DeferredTaxAssetsOtherComprehensiveLoss

us-gaap:DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsEmployeeBenefits
us-gaap:RetirementPlanType
us-gaap:DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsPensions

us-gaap:DeferredTaxLiabilitiesInvestmentInNoncontrolledAffiliates

us-gaap:DeferredTaxLiabilitiesPropertyPlantAndEquipment
us-gaap:RetirementPlanType
us-gaap:DefinedBenefitPlanAccumulatedBenefitObligation
us-gaap:RetirementPlanType
us-gaap:DefinedBenefitPlanAccumulatedOtherComprehensiveIncomeBeforeTax
us-gaap:RetirementPlanType
us-gaap:DefinedBenefitPlanAccumulatedOtherComprehensiveIncomeNetGainsLossesBeforeTax
us-gaap:RetirementPlanType
us-gaap:DefinedBenefitPlanAccumulatedOtherComprehensiveIncomeNetPriorServiceCostCreditBeforeTax
us-gaap:RetirementPlanType
us-gaap:DefinedBenefitPlanAmountsRecognizedInBalanceSheet
us-gaap:RetirementPlanType
us-gaap:DefinedBenefitPlanAssumptionsUsedCalculatingBenefitObligationDiscountRate
us-gaap:RetirementPlanType
us-gaap:DefinedBenefitPlanAssumptionsUsedCalculatingBenefitObligationRateOfCompensationIncrease
us-gaap:RetirementPlanType
us-gaap:DefinedBenefitPlanBenefitObligation
us-gaap:RetirementPlanType
us-gaap:DefinedBenefitPlanExpectedFutureBenefitPaymentsFiveFiscalYearsThereafter
us-gaap:RetirementPlanType
us-gaap:DefinedBenefitPlanExpectedFutureBenefitPaymentsNextTwelveMonths
us-gaap:RetirementPlanType
us-gaap:DefinedBenefitPlanExpectedFutureBenefitPaymentsYearFive
us-gaap:RetirementPlanType
us-gaap:DefinedBenefitPlanExpectedFutureBenefitPaymentsYearFour
us-gaap:RetirementPlanType
us-gaap:DefinedBenefitPlanExpectedFutureBenefitPaymentsYearThree
us-gaap:RetirementPlanType
us-gaap:DefinedBenefitPlanExpectedFutureBenefitPaymentsYearTwo
us-gaap:RetirementPlanType
us-gaap:DefinedBenefitPlanFundedStatusOfPlan
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:FairValueByMeasurementFrequency
us-gaap:DerivativeAssets

us-gaap:DerivativeCollateralRightToReclaimCash

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

us-gaap:DerivativeFairValueOfDerivativeLiability
oke:DerivativeInstrumentContractTypeBySubtype, us-gaap:BalanceSheetLocation, us-gaap:DerivativeInstrumentRisk, us-gaap:HedgingDesignation
us-gaap:BalanceSheetLocation, us-gaap:DerivativeInstrumentRisk, us-gaap:HedgingDesignation
us-gaap:HedgingDesignation
us-gaap:FairValueByMeasurementFrequency
us-gaap:DerivativeLiabilities

us-gaap:DerivativeLiabilityCollateralRightToReclaimCashOffset
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
oke:DerivativeInstrumentByMethodForSettingNotionalAmount, us-gaap:DerivativeInstrumentRisk, us-gaap:DerivativeInstrumentsGainLossByHedgingRelationship, us-gaap:LongtermDebtType
us-gaap:DerivativeNotionalAmount
oke:DerivativePositonByTransactionType, us-gaap:DerivativeInstrumentRisk, us-gaap:HedgingDesignation
us-gaap:AwardType
us-gaap:EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized

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

us-gaap:EquityMethodInvestments
us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName
us-gaap:StatementBusinessSegments

us-gaap:FairValueNetDerivativeAssetLiabilityMeasuredOnRecurringBasisWithUnobservableInputs
oke:LeaseDescription
us-gaap:FinanceLeaseLiability
oke:LeaseDescription
us-gaap:FinanceLeaseLiabilityCurrent
oke:LeaseDescription
us-gaap:FinanceLeaseLiabilityNoncurrent
oke:LeaseDescription
us-gaap:FinanceLeaseLiabilityPaymentsDue
oke:LeaseDescription
us-gaap:FinanceLeaseLiabilityPaymentsDueAfterYearFive
oke:LeaseDescription
us-gaap:FinanceLeaseLiabilityPaymentsDueNextTwelveMonths
oke:LeaseDescription
us-gaap:FinanceLeaseLiabilityPaymentsRemainderOfFiscalYear
oke:LeaseDescription
us-gaap:FinanceLeaseLiabilityUndiscountedExcessAmount

us-gaap:FiniteLivedIntangibleAssetsAccumulatedAmortization

us-gaap:FiniteLivedIntangibleAssetsAmortizationExpenseNextTwelveMonths

us-gaap:FiniteLivedIntangibleAssetsAmortizationExpenseYearFive

us-gaap:FiniteLivedIntangibleAssetsAmortizationExpenseYearFour

us-gaap:FiniteLivedIntangibleAssetsAmortizationExpenseYearThree

us-gaap:FiniteLivedIntangibleAssetsAmortizationExpenseYearTwo

us-gaap:IntangibleAssetsGrossExcludingGoodwill

us-gaap:InterestPayableCurrent
us-gaap:DerivativeInstrumentRisk, us-gaap:DerivativeInstrumentsGainLossByHedgingRelationship
us-gaap:InterestRateCashFlowHedgeGainLossToBeReclassifiedDuringNext12MonthsNet
us-gaap:DerivativeInstrumentRisk, us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FairValueByMeasurementFrequency
us-gaap:InterestRateDerivativeAssetsAtFairValue
us-gaap:DerivativeInstrumentRisk, us-gaap:FairValueByMeasurementBasis, us-gaap:FairValueByMeasurementFrequency
us-gaap:DerivativeInstrumentRisk, us-gaap:FairValueByMeasurementFrequency
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
oke:LeaseDescription
us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueNextTwelveMonths
oke:LeaseDescription
us-gaap:LesseeOperatingLeaseLiabilityPaymentsRemainderOfFiscalYear

us-gaap:LettersOfCreditOutstandingAmount

us-gaap:LiabilitiesOtherThanLongtermDebtNoncurrent

us-gaap:LongTermDebtFairValue

us-gaap:LongTermDebtMaturitiesRepaymentsOfPrincipalInNextTwelveMonths

us-gaap:LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFive
us-gaap:LongtermDebtType

us-gaap:LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFour
us-gaap:LongtermDebtType

us-gaap:LongTermDebtMaturitiesRepaymentsOfPrincipalInYearThree
us-gaap:LongtermDebtType

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

us-gaap:MaterialsSuppliesAndOther

us-gaap:OperatingLossCarryforwardsValuationAllowance
us-gaap:RetirementPlanType
us-gaap:PensionAndOtherPostretirementDefinedBenefitPlansCurrentLiabilities
us-gaap:DerivativeInstrumentRisk, us-gaap:DerivativeInstrumentsGainLossByHedgingRelationship
us-gaap:PriceRiskCashFlowHedgeUnrealizedGainLossToBeReclassifiedDuringNext12Months

us-gaap:RevenueRemainingPerformanceObligation
oke:RevenueRemainingPerformanceObligation
us-gaap:AwardType
us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber
us-gaap:AwardType
us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAvailableForGrant

us-gaap:TreasuryStockShares

Plots across concepts


IncomeStatement
Other Comprehensive Income Loss Net Of Tax
Expenses
Income Tax Expense Benefit
Balance Sheet
Operating Lease Liability Noncurrent
Assets
Cash And Cash Equivalents At Carrying Value
Current Assets
Other Assets Current
NonCurrent Assets
Intangible Assets Net Excluding Goodwill
PropertyPlantAndEquipmentNet
Accumulated Depreciation Depletion And Amortization Property Plant And Equipment
Liabilities
Liabilities Current
Current Liabilities
Operating Lease Liability Current
Noncurrent Liabilities
Operating Lease Liability Noncurrent
Stockholders Equity
Accumulated Other Comprehensive Income Loss Net Of Tax
Per Share
Earnings Per Share Diluted
CashFlow
Net Cash Provided By Used In Financing Activities
NetCashProvidedByUsedInOperatingActivities
Gain Loss On Sale Of Property Plant Equipment
NetCashProvidedByUsedInInvestingActivities
Net Cash Provided By Used In Investing Activities
NetCashProvidedByUsedInFinancingActivities
Net Cash Provided By Used In Financing Activities
Shares
Treasury Stock Shares

Tables

  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
us-gaap:CommonStockValue █████▇▇▇▇▇▇▇▇▇▇▇▇▃▃▃▃▃▃▃▃▃▃▃▃▃▃▃▃▃▃▃▃▁▁▁▁▁▁4.7494.7494.7494.7494.7494.454.454.454.454.454.454.454.454.454.2324.1594.1472.4582.4582.4582.4582.4582.4582.4582.4582.4582.4582.4582.4582.4582.4582.4582.4582.4582.4582.4582.4581.2291.2291.2291.2291.2281.228NANANA
us-gaap:PreferredStockParOrStatedValuePerShare ▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄1e-081e-081e-081e-081e-081e-081e-081e-081e-081e-081e-081e-081e-081e-081e-081e-081e-08NA0.0NANANANANANANANANANANANANANANANANANANANANANANANANANANA
 us-gaap:SharesIssued us-gaap:StatementEquityComponents us-gaap:CommonStock▁▁▁▁▁▁█▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁474.916234474.916234474.916234474.916234474.916234445.016234445016.234445.016234445.016234445.016234445.016234445.016234445.016234445.016234423.166234415.913504414.732011245.81118245.81118245.81118245.81118245.81118245.81118245.81118245.81118245.81118245.81118245.81118245.81118245.81118245.81118245.81118245.81118245.81118245.81118245.81118245.81118122.905591122.904924122.895643122.891704122.847421122.815636NANANA
 us-gaap:SharesIssued us-gaap:StatementEquityComponents us-gaap:PreferredStock▁▁▁▁▁▁█▁▁▁▁▁▁▁▁▁▁▁▁▁▁0.020.020.020.020.020.0220.00.020.020.020.020.020.020.020.020.020.020.00.00.00.0NA0.0NANANA0.0NANANANANANANANANANANANANANANANANANANA
us-gaap:CommonStockSharesIssued █████▇▇▇▇▇▇▇▇▇▆▆▆▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁474.916234474.916234474.916234474.916234474.916234445.016234445.016234445.016234445.016234445.016234445.016234445.016234445.016234445.016234423.166234415.913504414.732011245.81118245.81118245.81118245.81118245.81118245.81118245.81118245.81118245.81118245.81118245.81118245.81118245.81118245.81118245.81118245.81118245.81118245.81118245.81118245.81118NA122.904924122.895643122.891704122.847421122.815636NANANA
us-gaap:PreferredStockSharesIssued ▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄0.020.020.020.020.020.020.020.020.020.020.020.020.020.020.020.020.02NA0.0NANANANANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:CommonStockSharesAuthorized █████████████████▃▃▃▃▃▃▃▃▃▃▃▃▃▃▃▃▃▃▃▃▁▁▁▁▁▁1200.01200.01200.01200.01200.01200.01200.01200.01200.01200.01200.01200.01200.01200.01200.01200.01200.0600.0600.0600.0600.0600.0600.0600.0600.0600.0600.0600.0600.0600.0600.0600.0600.0600.0600.0600.0600.0300.0300.0300.0300.0300.0300.0NANANA
us-gaap:CommonStockSharesOutstanding █████▇▇▇▇▇▇▇▇▇▇▇▇▃▃▃▃▃▃▃▃▃▃▃▃▃▃▃▃▃▃▃▃▁▁▁▁▁▁445.817509445.53418444.872383444.392615444.196627413.88272413.23905413.076116412.964601412.752687411.532606411.358838411.17376411.073529388.703543381.285028380.004718210.906018210.681661210.517586210.418903210.098753209.731028209.273336208.976736208.760251208.322247208.193467207.999517207.865891206.618877206.2732206.190506206.088765204.935043204.598717205.041894103.922403103.25498102.982759103.526104107.105747106.815582NANANA
us-gaap:WeightedAverageNumberOfDilutedSharesOutstanding █▁446.903446.885NA445.51420.116415.348NA415.578415.049415.233NA414.847414.641412.173NA383.419214.012213.602NA212.87212.618211.071NA210.524210.477210.467NA210.759210.516210.166NA209.893208.874209.458NA209.960.2117840.105926NA0.105970.108030.109179NA0.1076510.1078380.10741
us-gaap:WeightedAverageNumberOfSharesOutstandingBasic █▁446.337445.894NA445.103419.722414.282NA413.816413.606412.908NA412.117411.946409.676NA380.907211.785211.619NA211.309211.075210.781NA210.296210.204209.874NA209.489209.403209.13NA206.235206.143205.479NA205.0050.2072920.103809NA0.1033030.1053370.10702NA0.1064430.1063560.106132
us-gaap:EarningsPerShareBasic ▅▆▅▅▄▁▅▅▅▆▅▅▅▅▃▄▄▄▄▄▄▄▃▄▄▃▄▄▃▄▄▃▂▄▄▄▃▇▇▅▄▇▅▄▄█0.770.870.690.70.32-0.340.770.750.750.820.710.760.680.650.160.430.340.410.429999999999999940.440.410.40.12999999999999990.390.360.290.449999999999999960.310.290.450.440000000000000060.30.00.550.540.320.291.181.10999999999999990.580.521.220.77999999999999980.520.391.46
us-gaap:EarningsPerShareDiluted ▅▆▅▅▄▁▅▅▅▆▅▅▅▅▃▄▄▄▄▄▄▄▃▄▄▃▄▄▃▄▄▄▂▄▄▄▃▇▇▅▄▇▅▄▄█0.770.860.690.70.32-0.340.770.740.750.810.70.750.680.640.160.430.330.410.429999999999999940.430.40.40.119999999999999880.390.360.290.449999999999999960.310.290.450.430000000000000050.30.00.540.530.310.291.161.080.570.511.190.76000000000000020.510.391.44
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
 Cost Ratio oke:RegulatedSegmentByName,us-gaap:StatementBusinessSegments oke:NaturalGasLiquidsRegulated,oke:NaturalGasLiquids█▇▇▇▅▄▄▃▁▂▁▂▁▁▂▁▁▁▁▁▁▁603.1570.6546.0541.7477.2435.1400.0379.7303.4323.1289.7316.0294.3300.0320.7293.1289.4296.3296.8299.2297.5281.8NANA227.5209.8NANANANANANANANANANANANANANANANANANANANA
 Cost Ratio oke:RegulatedSegmentByName,us-gaap:StatementBusinessSegments oke:NaturalGasPipelinesRegulated,oke:NaturalGasPipelines▂█▂▂▂▂▂▂▂▂▂▂▂▂▂▂▁▂▂▁▁▁69.4181.472.971.879.973.970.672.372.370.168.265.964.568.067.665.662.868.966.361.056.654.8NANA64.154.2NANANANANANANANANANANANANANANANANANANANA
 Cost Ratio us-gaap:StatementBusinessSegments oke:NaturalGasGatheringAndProcessing█▇▅▃▁▃▅▃▄▆▇▇▆▆█▇▆▅▅▃▃▃863.452839.741610.927459.405299.809449.98615.586476.212582.18694.661834.402791.255700.929707.991896.555782.928685.815661.276630.589512.218476.759432.011NANA460.062455.623NANANANANANANANANANANANANANANANANANANANA
 Cost Ratio us-gaap:StatementBusinessSegments oke:NaturalGasLiquids▇▅▄▃▁▂▄▃▄▄▅▇▅▆█▅▄▅▄▃▃▂2999.4782610.0652151.491832.2171335.7141770.5922247.9511900.5072072.5582311.52601.8913026.2882613.932692.4693382.5562501.9792349.6852391.9842277.0142039.2571871.9931487.39NANA1848.8751496.092NANANANANANANANANANANANANANANANANANANANA
 Cost Ratio us-gaap:StatementBusinessSegments oke:NaturalGasPipelines▂█▂▂▃▂▂▃▂▂▂▂▂▂▂▂▂▂▂▁▁▁112.444248.814119.845117.296122.058120.783116.508121.548117.531116.4116.838105.19499.792109.911108.827106.43897.849106.818113.24292.07788.06985.973NANA80.11283.549NANANANANANANANANANANANANANANANANANANANA
 Cost Ratio us-gaap:StatementBusinessSegments oke:TotalSegments▇▆▄▃▁▃▄▃▄▅▆▇▅▆█▅▅▅▄▃▃▂3975.3743698.622882.2622408.9181757.5812341.3552980.0452498.2672772.2693122.5613553.1313922.7373414.6513510.3714387.9383391.3453133.3493160.0783020.8452643.5522436.8212005.374NANANANANANANANANANANANANANANANANANANANANANANANA
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
 TTM Greenblatt ROC _ _██▇▇▅▁▆▆▆▆▆▆▆▆▆▅▅▅▅▅▅▅▄▄▄▄▅▅▄▅▅▄▃▄▅▄▄▅▅▄▄▅▄611.512664.721538.663550.433355.73-83.469487.314482.151476.146468.742471.865495.534448.366419.699397.836351.906316.733314.42329.6329.357315.285311.434242.017284.935272.744196.463306.747291.392251.315294.117294.621230.081128.183273.849299.586242.913234.079325.922363.079248.881216.917330.036241.068NANANA
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
us-gaap:ComprehensiveIncomeNetOfTax ▅█▆▆▅▁▇▆▆▆▆▇▆▇▄▅▄▅▄▄▄▄▄▄▄▄▄▄▄▄▅▄▄▅▅▄▄▅▄▄▄▅▄▄▄▅206.292472.029287.198306.601108.804-267.243367.355224.447245.091255.923262.787333.71277.151316.44756.286160.05674.958102.64990.50697.03961.31276.07434.38581.37981.06357.26165.84769.92958.376102.2188.24254.83412.102106.166135.2230.38334.198150.14183.45317.01459.013103.79564.5468.51343.803167.588
us-gaap:CostOfRevenue ▅▄▃▂▁▂▃▂▃▄▅▅▄▅▇▅▄▄▄▃▃▂▂▂▃▂▅▆▅▆█▇▆▆▇▅▄▆▇▇▇▇▆▅▅▇2366.9792121.511627.0861265.674940.4581276.9281791.3411414.5281625.7941956.3772318.0992560.7652175.8182368.0263073.7642229.4162091.0222143.8432021.471751.5931527.3231195.7381333.2861360.8091603.0931343.8642281.2732583.2042571.4022652.6693488.4573010.7372895.8472917.9933055.6042474.8031980.2982771.0133138.073061.1982992.8283233.3392812.4742491.3332349.0543304.648
us-gaap:GainsLossesOnExtinguishmentOfDebt NANA0.12.24.315.8NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest ▇█▇▇▅▁▇▇▇▇▇▇▇▆▆▆▅▅▅▅▅▅▃▅▅▄▆▄▅▅▅▅▄▅▅▅▅▆▆▅▅▆▅▄▄452.208508.308403.236418.871177.461-197.252418.431406.52410.898415.142389.506416.899369.71341.82316.181263.659219.835241.126249.631249.804232.544225.977-13.627202.996199.242133.265256.769152.31191.073219.721239.217187.14780.857233.122254.235207.572189.35293.289333.67194.634170.931282.605202.059150.266117.422NA
us-gaap:IncomeTaxExpenseBenefit ▅▅▄▅▃▁▅▄▅▄▄▅▄▄█▄▃▄▄▄▃▃▃▃▃▃▄▃▃▃▄▃▂▄▄▃▃▄▄▃▃▄▄▃▃▄110.069122.13295.207106.55543.14-55.39598.1897.36598.93577.93496.618102.98387.53175.771251.36997.12843.84454.94154.8755.01252.45850.06612.65238.29848.22237.42856.00337.85842.31314.98455.15439.4491.36267.41758.3642.58440.41273.83971.14833.75436.16584.98155.5129.96531.04897.311
us-gaap:InterestExpense ▆▆▆▆█▄▄▄▃▃▃▃▃▃▄▄▃▃▃▃▃▃▃▃▃▂▂▂▂▂▂▂▂▂▂▁▁▁▁▁▁▂▁▁▁▁184.957185.523176.931176.371218.968140.616129.283129.577117.493115.42118.489121.91113.496115.725124.19126.533118.473116.462114.188118.24118.976118.247110.73106.923102.38496.7586.45986.05288.75194.90190.1381.90881.73180.43783.59171.36471.53575.81568.31873.84175.49879.34969.45170.90775.36176.52
us-gaap:NetIncomeLossAvailableToCommonStockholdersBasic ▇█▇▇▅▁▇▇▇▇▇▇▇▆▄▅▄▄▄▄▄341.864385.901307.754312.041134.046-142.132319.976308.88311.688336.933292.613312.984280.773264.23362.771165.46671.47687.36190.50592.14485.944NANANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:OperatingIncomeLoss ██▇▇▅▁▆▆▆▆▆▆▆▆▆▅▅▅▅▅▅▅▄▄▄▄▅▅▄▅▅▄▃▄▅▄▄▅▅▄▄▅▄▄▃▅611.512664.721538.663550.433355.73-83.469487.314482.151476.146468.742471.865495.534448.366419.699397.836351.906316.733314.42329.6329.357315.285311.434242.017284.935272.744196.463306.747291.392251.315294.117294.621230.081128.183273.849299.586242.913234.079325.922363.079248.881216.917330.036241.068186.904178.713337.332
us-gaap:OtherComprehensiveIncomeLossNetOfTax ▁█▄▅▄▁▇▃▃▃▄▆▅▇▅▅▅▆▇▅▃▄▅▅▅▅▄▅▅▅█▅▆▅▆▃▄▆-135.84785.853-20.831-5.715-25.517-125.38647.104-84.708-66.872-81.285-30.10120.451-3.89751.939-6.759-5.6865.47444.10547.17411.273-85.139-28.7839.432.0226.655-18.625-23.76411.643-19.413-8.62496.566-9.48643.285-13.88119.588-57.044-41.07140.84NANANANANANANANA
 us-gaap:OtherComprehensiveIncomeLossNetOfTax us-gaap:StatementEquityComponents us-gaap:AccumulatedOtherComprehensiveIncome▁█-135.84785.853NA-5.715-25.517-125.38647.104-84.708-66.872-81.285-30.10120.451-3.89751.939-6.759-5.6863.26515.2880.0014.895-24.632-7.3728.87-0.7784.558-3.539-28.6975.471-3.2148.68597.505-7.52211.183-6.355NANANANANANANANANANANANA
us-gaap:PreferredStockDividendsIncomeStatementImpact ████████████████▇▁▁▁▁0.2750.2750.2750.2750.2750.2750.2750.2750.2750.2750.2750.2750.2750.2750.2740.2760.2170.00.00.00.0NANANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:ProfitLoss ▇█▇▇▅▁▇▇▇▇▇▇▇▆▄▅▅▅▅▅▅▅▃▅▅▄▆▄▅▆▅▅▄▅▅▅▅▆▆▅▅▆▅▄▄▅342.139386.176308.029312.316134.321-141.857320.251309.155311.963337.208292.888313.916282.179266.04964.812166.531175.991186.185194.465194.216179.859174.959-28.216160.838150.8895.693201.565114.281140.751206.511184.063147.69879.495165.705195.875164.988149.205233.462264.751160.88134.766199.346147.935120.30186.374186.72
 us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:ProductOrService,us-gaap:StatementBusinessSegments oke:GatheringandExchangeServicesRevenue,oke:NaturalGasGatheringAndProcessing▂▁▁▄▄▅▅██▆▆▇█▅34.13931.68731.59836.45935.94937.93738.22642.79543.53639.74240.86341.10142.80138.429NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
 us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:ProductOrService,us-gaap:StatementBusinessSegments oke:GatheringandExchangeServicesRevenue,oke:NaturalGasLiquids█▅▆█▆▆▄▄▄▃▅▆▃▁129.624113.231117.654132.21118.174120.536104.667105.179105.85898.534108.336116.83396.4783.258NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
 us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:ProductOrService,us-gaap:StatementBusinessSegments oke:GatheringandExchangeServicesRevenue,oke:TotalSegments▇▄▅█▆▆▄▅▅▃▅▆▄▁163.763144.918149.252168.669154.123158.473142.893147.974149.394138.276149.199157.934139.271121.687NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
 us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:ProductOrService,us-gaap:StatementBusinessSegments oke:NGLandCondensateSales,oke:NaturalGasGatheringAndProcessing█▇▄▃▁▃▄▃▄▄▆▇▆▆566.383491.807320.08239.81109.581219.917334.357244.932312.757332.332413.832501.163447.839413.157NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
 us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:ProductOrService,us-gaap:StatementBusinessSegments oke:NGLandCondensateSales,oke:NaturalGasLiquids█▆▄▃▁▃▅▃▄▅▆█▆▇2829.6042414.831979.9181658.1231174.581596.7112084.5361746.631921.5642158.1032435.6642861.8962469.5172552.77NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
 us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:ProductOrService,us-gaap:StatementBusinessSegments oke:NGLandCondensateSales,oke:TotalSegments█▆▄▃▁▃▅▃▄▅▆█▆▇3395.9872906.6372299.9981897.9331284.1611816.6282418.8931991.5622234.3212490.4352849.4963363.0592917.3562965.927NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
 us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:ProductOrService,us-gaap:StatementBusinessSegments oke:ResidueNaturalGasSales,oke:NaturalGasGatheringAndProcessing▄▆▄▂▁▂▄▂▃▆█▄▃▄257.802312.247253.051178.492150.892189.051240.477185.303221.333319.036375.073245.474208.618254.997NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
 us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:ProductOrService,us-gaap:StatementBusinessSegments oke:ResidueNaturalGasSales,oke:NaturalGasPipelines▁█▁▁▁▁▁▁▁▁▁▁▁▁0.004115.4552.663.9980.02.0350.0020.2310.0410.973.9110.7630.1794.919NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
 us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:ProductOrService,us-gaap:StatementBusinessSegments oke:ResidueNaturalGasSales,oke:TotalSegments▄█▄▂▁▂▃▂▃▅▇▃▂▄257.806427.702255.711182.49150.892191.086240.479185.534221.374320.006378.984246.237208.797259.916NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
 us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:ProductOrService,us-gaap:StatementBusinessSegments oke:TransportationandStorageRevenue,oke:NaturalGasLiquids▁▅▆▂▂▆█▄▃▇█▄▄▇37.86448.72851.50539.77440.88150.75556.09946.40742.65552.32255.27745.25145.01253.478NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
 us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:ProductOrService,us-gaap:StatementBusinessSegments oke:TransportationandStorageRevenue,oke:NaturalGasPipelines▃▆▄▃▅▄█▃▃▂▂▂▁▂112.337132.947116.909113.047121.777118.364148.711108.384105.701103.47104.36898.03193.27798.338NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
 us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:ProductOrService,us-gaap:StatementBusinessSegments oke:TransportationandStorageRevenue,oke:TotalSegments▂▆▄▃▄▄█▃▂▃▃▂▁▂150.201181.675168.414152.821162.658169.119204.81154.791148.356155.792159.645143.282138.289151.816NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:Revenues ▆▅▄▂▁▂▄▃▃▄▅▆▅▅▇▅▄▄▄▃▂▁▂▂▂▁▄▅▅▅█▆▆▆▇▅▃▆█▆▆▇▆▅▄▇3388.9643194.6792570.5772174.2641660.7292136.6722663.6062263.2282457.5752779.9583136.73393.892960.5293102.0773792.1582906.3662725.7722749.6112654.4612357.9072134.1071774.4591930.9021898.9462128.0521805.3062844.7683120.1453066.8823163.2964140.1113571.9253349.2363541.4453659.9243028.7752529.263414.64071.0373595.1913514.4763866.8883280.052942.7032807.1313923.967
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
us-gaap:Assets █████▇▇▇▆▅▅▅▄▄▄▄▄▄▄▃▃▃▃▃▃▃▃▂▂▂▅▄▃▃▃▃▂▂▂▂▂▂▁▁▁23437.24823179.92923078.75422780.87622992.46721969.4421812.12121335.90719751.59418934.32518231.67117911.31416913.7216432.34716845.93716764.84116672.92316067.55816138.75115982.03515822.915501.14915446.11115508.29815651.1815533.07315304.5614312.19614384.53813653.13417707.55817610.34315842.27415446.21915855.27515364.30713817.19114252.07613696.63513171.12413036.33313039.59612499.17511929.75312119.911NA
us-gaap:LiabilitiesAndStockholdersEquity █████▇▇▇▆▅▅▄▄▄▄▄▄▃▃▃▃▃▃▃▃▃▃▂▂▂▄▄▃▃▃▃▂▂▂▁▁▁▁23437.24823179.92923078.75422780.87622992.46721969.4421812.12121335.90719751.59418934.32518231.67117911.31416913.7216432.34716845.93716764.84116672.92316067.55816138.75115982.03515822.915501.14915446.11115508.29815651.1815533.07315304.5614312.19614384.53813653.13417707.55817610.34315842.27415446.21915855.27515364.30713817.19114252.07613696.63513171.12413036.33313039.59612499.175NANANA
us-gaap:StockholdersEquity ▇▇▇▇█▇▇▇██████▇▇▇▁▁▁▁▁▁▁▁▁▁▁▂▁▃▃▃▃▃▃▃▃▃▃▃▃▃5910.3866096.9656042.3986146.1126240.6525560.6416225.9516218.9066348.1366442.0066579.5436652.7586664.866701.4465527.8675359.4955407.747238.382188.745214.296237.429286.888335.798414.472517.508530.158592.115623.232656.425584.52337.8512189.6942085.3492134.3542129.6092065.7062089.542256.1522238.5732185.962217.0892499.0842448.623NANANA
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
us-gaap:AssetsCurrent ▅▅▄▄▅▃▃▅▃▂▃▄▃▂▄▃▃▂▃▂▂▁▁▁▂▂▂▄▅▃▆█▄▄▇█▄▇▆▆▇▇▆2235.6231997.5941869.7751721.3622179.8591488.2821470.3341967.5851401.171342.7791398.6321807.9081433.6871290.7451764.4581518.8651447.8111378.4471429.6841369.2911281.188991.021975.21952.791263.7961321.9491307.2441712.7872059.6551656.3272370.8022882.0241889.5891949.6632764.662956.031807.3192609.2752318.8122312.0432529.2612795.7742379.045NANANA
us-gaap:CashAndCashEquivalentsAtCarryingValue ▄▄▅▄█▅▁▆▃▁▁▂▁▁▁▁▃▃▃▃▂▂▂▁▃▃▂▂▄▂▂▇▁▂▅█▂▇▁▂▄▇▁▁▂▂374.377402.413524.496447.129945.732531.6320.958673.309273.39727.81411.97584.46415.29517.47437.19311.676332.371310.808248.875237.41180.854137.21997.61938.371226.193239.411172.812151.403358.56210.227149.313779.52433.681143.947583.618978.825114.92781.19265.953148.407477.573870.08631.03450.483103.251167.433
us-gaap:ReceivablesNetCurrent ▅▄▃▂▂▁▃▂▂▃▃▅▄▃▆▄▃▃▃▃▂▁▂▂▂▂▃▄▅▄█▅▅▆▇▄▃▅▇▅▅▆▇1091.982909.972829.796717.852608.923497.556835.121718.708669.289812.869818.9581085.075934.664844.2181202.951939.595749.345734.844872.43737.224672.059521.436593.979586.157684.899628.064745.494971.2851097.008883.6731549.5631166.9941158.7381261.8041349.371984.724793.8421154.9511339.9331141.1321125.3381280.1251332.726NANANA
us-gaap:InventoryNet ▅▄▂▃▂▁▃▃▂▂▃▅▃▂▄▃▂▂▁▂▂▁▁▁▁▂▁▄▃▂▄▇▅▃▆▇▆▃▆▇▆▄█454.76369.604227.81300.577201.883131.041304.926283.545184.95243.223296.667426.293285.776185.298342.293314.266200.133193.339140.034217.769245.946156.075128.084142.308150.137218.691134.134338.345335.116231.237417.077664.213434.996302.473517.014644.719561.802299.13549.915658.059574.173407.671708.933NANANA
us-gaap:OtherAssetsCurrent ▅▅▅▃▃▂▃▃▂▂▃▂▂▄▂▂▁▄▁▁▂▂▁▂▆▆▆▄▄▃▆▆▆▅▆██▅▇▇▆▄▅154.807155.224132.53683.56592.30259.11682.31379.76369.59656.793100.80861.3457.286106.06753.00864.19651.465108.55245.98650.75958.254.02439.94676.129155.967175.425173.299119.427118.545102.089171.018160.452163.055154.154175.869220.135208.704155.695185.143202.26161.54106.699149.558NANANA
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
us-gaap:PropertyPlantAndEquipmentGross █████▇▇▇▆▆▅▅▄▄▄▄▄▄▄▄▄▃▃▃▃▃▃▂▂▂▄▄▃▃▃▂▂▂▂▁▁▁▁23393.03423192.54823072.93522803.16722622.74722136.44222051.49220948.26719806.75918887.74218030.96317120.18716363.71615838.44315559.66715364.28915241.1415154.3615078.49714943.22514811.60614671.93414530.4614457.2814175.03713908.36213602.64712173.83511737.29111313.49815536.15614944.16214085.13113560.48313088.99112404.87811953.91611495.21911177.93410709.41710350.55210036.449854.485NANANA
us-gaap:AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment ██▇▇▆▆▇▆▆▆▅▅▅▄▄▄▄▃▃▃▃▂▂▂▂▂▁▁▁▁▅▅▅▅▄▄▄▄▄▄▃▃▃4211.5154067.2973918.0073773.8523641.5743506.953702.8073585.4113470.523369.713264.3123159.663059.7992960.2542861.5412785.6822694.1482600.7762507.0942416.4762326.9842234.8072156.4712178.6872099.1872017.0411940.211931.7131866.6271802.7043238.6523173.3663105.6463039.2652974.6512914.4962855.8632794.1832733.6012690.1042637.9782597.5472541.302NANANA
us-gaap:PropertyPlantAndEquipmentNet ███████▇▆▆▅▅▅▄▄▄▄▄▄▄▄▄▄▄▄▄▄▃▃▂▄▄▃▃▃▂▂▂▂▁▁▁▁19181.51919125.25119154.92819029.31518981.17318629.49218348.68517362.85616336.23915518.03214766.65113960.52713303.91712878.18912698.12612578.60712546.99212553.58412571.40312526.74912484.62212437.12712373.98912278.59312075.8511891.32111662.43710242.1229870.6649510.79412297.50411770.79610979.48510521.21810114.349490.3829098.0538701.0368444.3338019.3137712.5747438.8937313.183NANANA
us-gaap:Goodwill NANA527.592527.592527.592527.592680.996NANANA681.1NANANA681.1NANANA525.535NANANA525.535NANANA525.535NANANA683.488NANANA591.488NANANA601.743NANANA602.844NANANA
 us-gaap:Goodwill oke:ReportableSegmentByName oke:NaturalGasLiquidsNANANA371.217371.217371.217371.217NANANA371.217NANANA371.217NANANA268.544NANANA268.544NANANA268.544NANANA268.544NANANANANANANANANANANANANANANA
 us-gaap:Goodwill oke:ReportableSegmentByName oke:NaturalGasPipelinesNANANA156.375156.375156.375156.375NANANA156.479NANANA156.479NANANA134.7NANANA134.7NANANA134.7NANANA134.7NANANANANANANANANANANANANANANA
us-gaap:IntangibleAssetsNetExcludingGoodwill NANA246.131NANANA276.837NANANA286.042NANANA312.36NANANA479.824NANANA491.723NANANA489.205NANANANANANANANANANANANANANANANANANANA
us-gaap:IntangibleAssetsNetIncludingGoodwill ▁▁▁▁▁▁▄▄▄▄▄▄▅▅▅▅▅▅▅▅▅▅▅▅▅▅▅▅▅▅█▅▅768.509771.116773.723776.33778.937781.544957.833960.808963.783964.167967.142970.117987.51990.485993.46996.435999.4091002.3841005.3591008.3341011.3091014.2841017.2581020.2331023.2091011.7651014.741017.7151018.6791021.621182.515990.456992.373NA996.206NANANANANANANANANANANA
 us-gaap:OperatingLeaseRightOfUseAsset oke:LeaseDescription oke:CertainOperatingLeasesEnteredIntoDuringThePeriodNANANA16.216.617.2NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
 us-gaap:OperatingLeaseRightOfUseAsset oke:LeaseDescription oke:LeaseAssetsandLiabilitiesIncludedintheConsolidatedBalanceSheetNANA100.154NANANA15.14716.17617.40616.374NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
 us-gaap:OperatingLeaseRightOfUseAsset oke:LeaseDescription oke:LeaseremainingbalancerelatedtoleaseenteredinDecember2019MemberMemberNANA69.070.772.374.0NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:OtherAssetsNoncurrent ▅▅▅▅▃▃▂▂▂▁▁▂▂▁▂▂▂▂▂▁▁▁▁▁▁▂▂▂▂▂▆████▇▇▇▇▆▆▆▆451.246478.247475.296463.496262.463259.643173.425174.147169.318158.423130.096191.17170.124159.428180.83182.265170.785176.755162.998121.529118.98112.614112.598115.716129.7167.724167.466184.935193.032202.626626.899765.194772.04760.92758.664701.491701.512720.174695.965575.095588.886595.649594.008NANANA
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
us-gaap:AccountsPayableCurrent ▅▄▂▂▃▃▆▅▄▅▅▇▅▃▅▄▂▂▄▂▂▁▂▂▂▂▄▆▆▆█▇▆▆▇▆▄▅▇▆▆▅▆1052.561929.771719.302624.483755.474742.3691209.91129.849907.3771027.3221118.1021339.5071027.467773.0541140.571922.82696.834703.278874.731711.817697.833522.317615.982620.568694.914721.535891.4131221.9341271.5391155.1141503.6991382.7851214.3221205.2481333.4891153.75911.9771110.1081341.7181241.6331194.1031131.9221215.468NANANA
us-gaap:ContractWithCustomerLiabilityCurrent █▃▅▆▇▂▅▆▇▂▃▅▆▁35.615.923.727.631.311.922.225.230.410.615.623.827.86.0NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:LiabilitiesCurrent ▅▄▂▁▂▁▄▃▃▃▄▅▆▄▆▆▇▆▇▅▅▃▃▄▆▆▅▃▃▄▆▆▆▅▇▅▅▆█▇▇▅█2394.6012047.9541344.5471094.1421273.1021091.3922020.2981567.1521737.3731689.6692108.4362450.2062572.0812050.8382667.3352741.082860.5192731.9742836.7012341.9642188.4211764.461638.2661960.8212606.5622548.722392.3451781.9011851.1711891.7242696.4072621.712648.7792337.0252812.9942439.1132256.6772600.3233246.1752976.7642840.6172301.6483151.112NANANA
us-gaap:LongTermDebtCurrent ▅▅▁▁▁▁▁▁▃▃▅▅██▄▄▅▄▄▄▄▄▂▆▆▆▁▁▁▁▁▁▁▁▁▁▁▄▄▄▄▄▆536.107543.7577.657.657.657.657.657.65307.65307.65507.65507.65932.65932.65432.65432.65494.703410.65410.65460.65460.65460.65110.65660.65660.65660.6510.6510.6510.6510.6510.65610.65610.68510.77110.85511.1412.262364.397364.391365.253368.248418.242643.236NANANA
us-gaap:OperatingLeaseLiabilityCurrent █▇▇▇▇▇▁14.5713.40813.6113.64613.56413.4251.883NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:OtherLiabilitiesCurrent ▃▂▁▁▁▁▅▂▄▂▄▃▃▂▃▃▃▂▃▄▃▂▂▂▄▃▅▂▃▂▇█▇▆▆▆▇▇▆▆▇██208.064145.24983.03278.12493.04189.897285.569123.146252.991119.176211.11208.312184.127122.922179.971166.825167.937122.624166.042214.662202.954126.549132.556157.705256.201208.211285.435120.162190.289127.697401.422433.055388.954357.88369.054358.253396.964410.399345.383352.52392.865450.051424.259NANANA
us-gaap:TaxesPayableCurrent ▆▂▆█▄▁▃▄94.04865.86289.428103.77877.75261.05775.42279.358NANA61.337NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
us-gaap:LongTermDebt ██████▆▆▅▄▄▃▂▂▃▃▃▃▃▃▃▃▃▃▂▂▂▂▂▂▂▂▁14200.014200.014200.014300.014300.014200.012500.012500.011100.010300.09400.08800.08000.08000.08500.08500.08300.08300.08300.08800.08800.08800.08400.08400.08000.08000.07200.07200.07200.07200.07800.07800.06500.0NA6500.0NANANANANANANANANANANA
us-gaap:LongTermDebtNoncurrent ██████▇▇▆▅▄▄▃▃▄▄▄▄▄▄▄▄▄▄▃▃▃▃▃▃▄▄▃▃▃▃▂▂▂▂▂▂▁13637.58113638.76714228.42114249.33914276.23214146.6512479.75712479.45210754.08710004.3418873.3348325.7087091.2467091.7518091.6298092.07835.6067919.8267919.9968320.1448320.2778320.4518323.5827773.7567291.47339.7667192.9297194.9577196.9887199.0297754.9757757.1596511.3596513.3276515.3726517.4645224.6235225.8494529.5514532.0534622.6164976.4583686.542NANANA
us-gaap:DeferredTaxLiabilitiesNoncurrent ▄▄▃▃▃▂▃▂▂▂▂▁▁▁▁▁▁▇▇▇▆▆▆▆▆▆▆▆▅▅█▇▇▇▇▇▆▆▆▆▆▅▅881.711814.528669.697582.334475.904442.653536.063418.736347.831270.751219.731132.24254.72653.80552.69776.26273.9831612.0391623.8221573.951518.3281484.7451436.7151437.0871451.8331430.4781395.2221303.5481253.0991144.3481938.2621776.9491716.5471678.8871592.8021539.961457.8961408.421446.5911386.9591288.4381223.251171.997NANANA
 us-gaap:PensionAndOtherPostretirementDefinedBenefitPlansLiabilitiesNoncurrent us-gaap:RetirementPlanType us-gaap:OtherPostretirementBenefitPlansDefinedBenefitNANA33.641NANANA13.249NANANA16.04NANANA23.805NANANA25.273NANANANANANANANANANANANANANANANANANANANANANANANANANANA
 us-gaap:PensionAndOtherPostretirementDefinedBenefitPlansLiabilitiesNoncurrent us-gaap:RetirementPlanType us-gaap:PensionPlansDefinedBenefitNANA199.301NANANA183.441NANANA171.796NANANA171.063NANANA162.352NANANANANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:OtherLiabilitiesNoncurrent ▅▄▇▆▆▆▅▆▅▄▄▃▃▃▂▂▂▂▂▂▂▂▁▂▂▂▂▁▁▁▄██▇▇▇▇▆▇▆▅▅▅531.262496.42706.081618.143632.861631.673525.756626.86538.873501.783450.627350.4357.184366.701348.924339.116337.584334.206321.846296.751293.153273.07264.248278.731276.897290.422281.757229.28237.468229.277472.734763.879791.233712.847701.657692.211672.007638.029674.586592.153584.552575.068566.462NANANA
us-gaap:OperatingLeaseLiabilityNoncurrent ▇▇▇███▁81.70785.29587.6190.80693.71696.43113.509NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
 us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearTwo oke:LeaseDescription oke:MaturityofOperatingLeaseLiabilitiesNANA15.116.4NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
 us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearThree oke:LeaseDescription oke:MaturityofOperatingLeaseLiabilitiesNANA13.815.1NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
 us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearFour oke:LeaseDescription oke:MaturityofOperatingLeaseLiabilitiesNANA12.513.8NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
 us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearFive oke:LeaseDescription oke:MaturityofOperatingLeaseLiabilitiesNANA11.112.5NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
 us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueAfterYearFive oke:LeaseDescription oke:MaturityofOperatingLeaseLiabilitiesNANA47.158.2NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
us-gaap:StockholdersEquity ▇▇▇▇█▇▇▇██████▇▇▇▁▁▁▁▁▁▁▁▁▁▁▂▁▃▃▃▃▃▃▃▃▃▃▃▃▃5910.3866096.9656042.3986146.1126240.6525560.6416225.9516218.9066348.1366442.0066579.5436652.7586664.866701.4465527.8675359.4955407.747238.382188.745214.296237.429286.888335.798414.472517.508530.158592.115623.232656.425584.52337.8512189.6942085.3492134.3542129.6092065.7062089.542256.1522238.5732185.962217.0892499.0842448.623NANANA
us-gaap:StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest NANA6042.398NANANA6225.9516218.9066348.1366442.0066579.5436652.7586838.4836869.2525685.3525516.3835565.2313469.5133428.9153440.2143492.1773645.5073766.3364037.3053999.3593893.2884005.8833759.3953793.3313127.7074845.184690.6464174.3564204.1334232.454175.5594205.9884379.4553799.7323682.063697.7043957.0183920.8413895.3953870.5743879.641
 us-gaap:StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest us-gaap:StatementEquityComponents us-gaap:AccumulatedOtherComprehensiveIncomeNANA-551.449NANANA-374.0-421.104-336.396-269.524-188.239-158.138-178.589-174.692-188.53-181.771-176.085-139.062-154.35-154.351-159.246-134.614-127.242-136.112-135.334-139.892-136.353-107.656-113.127-109.913-121.987-219.492-211.97-223.153-216.798-240.476-205.64-178.845-206.121-174.573-131.266-135.137-108.802NANANA
 us-gaap:StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest us-gaap:StatementEquityComponents us-gaap:AdditionalPaidInCapitalNANA7353.396NANANA7403.895NANANA7615.1387662.6737699.9347735.1736588.8786418.0386463.131232.0691234.3141264.0411294.5831327.5511378.4441477.6311564.3161537.1661541.5831515.1581503.5821377.0231433.61404.0861278.2131267.7351324.6981337.0451326.2041317.4891418.4141404.0871396.0421384.2871392.671NANANA
 us-gaap:StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest us-gaap:StatementEquityComponents us-gaap:CommonStockNANA4.749NANANA4.45NANANA4.454.454.454.454.2324.1594.1472.4582.4582.4582.4582.4582.4582.4582.4582.4582.4582.4582.4582.4582.4582.4582.4582.4582.4582.4582.4581.2291.2291.2291.2291.2281.228NANANA
 us-gaap:StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest us-gaap:StatementEquityComponents us-gaap:TreasuryStockNANA-764.298NANANA-808.394-812.539-815.376-820.767-851.806-856.227-860.935-863.485-876.713-880.931-883.445-887.97-893.677-897.852-900.366-908.507-917.862-929.505-937.051-942.55-953.701-956.977-961.911-965.31-997.035-1005.829-1007.834-1010.45-1039.773-1048.329-1050.942-903.585-935.323-947.839-949.632-652.573-663.274NANANA
us-gaap:CommonStockValue █████▇▇▇▇▇▇▇▇▇▇▇▇▃▃▃▃▃▃▃▃▃▃▃▃▃▃▃▃▃▃▃▃▁▁▁▁▁▁4.7494.7494.7494.7494.7494.454.454.454.454.454.454.454.454.454.2324.1594.1472.4582.4582.4582.4582.4582.4582.4582.4582.4582.4582.4582.4582.4582.4582.4582.4582.4582.4582.4582.4581.2291.2291.2291.2291.2281.228NANANA
us-gaap:AdditionalPaidInCapital ▇████▇████████▇▇▇▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁7247.3347305.2747353.3967448.4847549.8316989.4537403.8957448.0997495.4587527.8477615.1387662.6737699.9347735.1736588.8786418.0386463.131232.0691234.3141264.0411294.5831327.5511378.4441477.6311564.3161537.1661541.5831515.1581503.5821377.0231433.61404.0861278.2131267.7351324.6981337.0451326.2041317.4891418.4141404.0871396.0421384.2871392.671NANANA
us-gaap:AccumulatedOtherComprehensiveIncomeLossNetOfTax ▁▃▂▂▂▂▄▄▅▆▇▇▇▇▇▇▇█▇▇▇██████████▆▇▆▆▆▇▇▇▇███-601.443-465.596-551.449-530.618-524.903-499.386-374.0-421.104-336.396-269.524-188.239-158.138-178.589-174.692-188.53-181.771-176.085-139.062-154.35-154.351-159.246-134.614-127.242-136.112-135.334-139.892-136.353-107.656-113.127-109.913-121.987-219.492-211.97-223.153-216.798-240.476-205.64-178.845-206.121-174.573-131.266-135.137-108.802NANANA
us-gaap:TreasuryStockValue ▁▁▂▂▂▂▃▃▃▃▄▄▄▄▄▄▄▄▄▅▅▅▅▅▅▆▆▆▆▆▇▇▇▇███▅▅▆740.254747.462764.298776.503781.489792.019808.394812.539815.376820.767851.806856.227860.935863.485876.713880.931883.445887.97893.677897.852900.366908.507917.862929.505937.051942.55953.701956.977961.911965.31997.0351005.8291007.8341010.451039.7731048.3291050.942903.585935.323947.839NA652.573663.274NANANA
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
us-gaap:NetCashProvidedByUsedInOperatingActivities ▆▆█▄▄▅▆▄▆▄▇▅▅▅▄▃▄▃▅▄▃▃▄▄▃▁▅▄▁▅▃▃▄▅▃▂▃▅▄▂▃▇▁▂▁▆544.666533.317795.94366.71313.697422.721619.934358.894614.345353.606670.269513.48507.649495.321379.416293.105373.801269.09429.586390.422302.128229.478311.903361.157294.6539.27415.071334.23245.924490.383273.221233.265316.783471.498228.084110.249226.525426.085330.353154.02227.818647.78174.011168.90432.41558.717
us-gaap:NetCashProvidedByUsedInInvestingActivities ▆▆▆▅▄▃▂▃▄▃▄▃▅▆▆▆▇▆▆▆▆▆▆▆▆▅▁▅▅▅▄▃▅▅▄▅▅▆▅▅▆▆▆█▆▇-153.874-170.691-288.658-426.985-590.094-964.792-1120.884-1015.813-767.232-864.829-630.068-883.419-345.749-255.652-173.036-210.866-74.268-109.463-130.857-186.109-128.532-169.947-248.538-286.409-321.997-333.775-1374.087-371.64-381.162-439.334-761.34-837.091-548.793-494.807-615.615-460.133-424.052-314.399-474.739-387.998-319.404-189.485-213.804249.333-103.509-66.376
us-gaap:NetCashProvidedByUsedInFinancingActivities ▁▁▁▁▅▇▂▇▄▅▂▅▂▂▂▁▂▂▂▂▂▃▃▂▃▄▇▂▅▃▂█▃▁▃▇▁▅▃▂▂▄▃▁▃▁-418.828-484.709-429.915-438.328690.4991052.743-151.4011056.831398.47527.062-112.69439.108-164.079-259.388-180.863-402.934-277.97-97.694-287.371-147.801-129.678-19.942-4.126-262.13613.9360.951980.227-169.647484.0549.865-142.0921349.669121.744-416.362-7.6761213.789-468.745594.69470.791-95.188-300.927380.756120.344-471.0056.917-354.307
us-gaap:CashAndCashEquivalentsPeriodIncreaseDecrease NA-122.08377.367-498.603414.102510.672-652.351399.912245.58315.839-72.48969.169-2.179-19.71925.517-320.69521.56361.93311.35856.51243.91839.58959.239-187.388-13.44766.44621.211-207.055148.81660.914-630.211745.843-110.266-439.671-395.207863.905-666.272706.38-73.595-329.166-392.513839.052-19.449-52.768-64.182138.034
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
us-gaap:DeferredIncomeTaxExpenseBenefit ▅▅▄▅▃▁▅▄▄▄▄▅▄▄█▄107.769119.19493.556106.71542.408-55.949103.24196.20297.29275.99496.501102.90786.71274.89258.73395.899NANANANANANANANANANANANANANANANANANANANANANA55.67192.45756.4652.04447.30652.20323.25219.542
us-gaap:DepreciationDepletionAndAmortization ████▇▆▆▅▅▅▄▄▄▄▄▄▄▃▃▃▃▃▃▃▃▂▂▂▁▁▄▃▃▃▂▂▂▂▂▂▂▂▂▂▂▂156.921157.12152.648153.245140.416132.353125.983121.43114.964114.158110.649107.383106.288104.237103.769102.298100.84999.41999.3198.5599.24794.47893.37988.29986.98785.95580.55574.58872.12767.414108.03494.26791.85590.22186.41581.43484.58683.40977.95975.98678.82479.39176.71777.23475.5177.856
us-gaap:IncreaseDecreaseInAccountsPayable ▆█▆▆▆▁▆▆▃▄▂█▆▁▇█▅▄▇▆▇▄▅▄▅▄▂▄▅▅▆▇▆▄▇█▃▃▆112.35251.344118.55242.032109.86-350.70199.86105.251-205.588-62.469-278.295240.73578.436-361.008179.131216.508-11.491-122.843149.43434.222168.064-64.088-13.601-55.423-10.221-125.898-306.807-107.76-31.24327.81782.333146.69739.736-103.69125.502247.523-227.332-176.674103.022NANANANANANANA
us-gaap:IncreaseDecreaseInInventories ▅▆▃▅▅▂▄▅▃▄▃▆▅▂▅▆▄▅▃▄▅▅▄▄▃▅▂▄▄▅▇▁▃▇▃▅█▁▃▃▂█▄▂▂▆85.156141.794-72.76798.69470.842-173.88521.38198.595-58.273-53.444-129.626140.517100.478-149.82528.027114.1336.79453.305-77.735-28.17789.87127.991-14.224-7.829-68.55484.557-204.2113.229-23.72263.844247.136-229.217-132.523214.541-127.70582.917262.672-251.227-92.82-107.785-166.502301.262-5.849-160.491-175.687177.305
us-gaap:IncreaseDecreaseInOtherOperatingCapitalNet ▄▃▅█▅▂▄▄▄▇▄▄▄▆▄▅▄▆▄▄▄▅▅▅▄▆▄▅▄▅▃▅▆▄▄▅▇▅▅▅▂▆▆▄▁█-3.139-56.96641.237179.41827.483-129.93-45.73-3.26-51.166114.33-27.069-4.341-25.26752.072-5.8582.404-34.58553.571-17.328-24.999-21.16327.21925.4277.21-28.59752.067-20.34934.903-30.04-1.011-104.3789.09979.022-22.425-22.0724.021142.9544.40841.06115.536-113.03967.81865.526-8.933-184.013158.974
us-gaap:NetCashProvidedByUsedInOperatingActivities ▆▆█▄▄▅▆▄▆▄▇▅▅▅▄▃▄▃▅▄▃▃▄▄▃▁▅▄▁▅▃▃▄▅▃▂▃▅▄▂▃▇▁▂▁▆544.666533.317795.94366.71313.697422.721619.934358.894614.345353.606670.269513.48507.649495.321379.416293.105373.801269.09429.586390.422302.128229.478311.903361.157294.6539.27415.071334.23245.924490.383273.221233.265316.783471.498228.084110.249226.525426.085330.353154.02227.818647.78174.011168.90432.41558.717
us-gaap:ProfitLoss ▇█▇▇▅▁▇▇▇▇▇▇▇▆▄▅▅▅▅▅▅▅▃▅▅▄▆▄▅▆▅▅▄▅▅▅▅▆▆▅▅▆▅▄▄▅342.139386.176308.029312.316134.321-141.857320.251309.155311.963337.208292.888313.916282.179266.04964.812166.531175.991186.185194.465194.216179.859174.959-28.216160.838150.8895.693201.565114.281140.751206.511184.063147.69879.495165.705195.875164.988149.205233.462264.751160.88134.766199.346147.935120.30186.374186.72
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
us-gaap:NetCashProvidedByUsedInInvestingActivities ▆▆▆▅▄▃▂▃▄▃▄▃▅▆▆▆▇▆▆▆▆▆▆▆▆▅▁▅▅▅▄▃▅▅▄▅▅▆▅▅▆▆▆█▆▇-153.874-170.691-288.658-426.985-590.094-964.792-1120.884-1015.813-767.232-864.829-630.068-883.419-345.749-255.652-173.036-210.866-74.268-109.463-130.857-186.109-128.532-169.947-248.538-286.409-321.997-333.775-1374.087-371.64-381.162-439.334-761.34-837.091-548.793-494.807-615.615-460.133-424.052-314.399-474.739-387.998-319.404-189.485-213.804249.333-103.509-66.376
us-gaap:PaymentsToAcquirePropertyPlantAndEquipment ▂▂▂▃▅▇█▇▆▇▆▅▃▂▂▁▁▁▁▂▁▂▂▃▂▃▄▃▃▃▅▄▄▄▅▄▃▃▄▃▃▂▂▂▁▁147.388176.734271.378380.042594.282949.6791109.0111019.174830.459889.705831.82694.303350.885264.467181.962135.19982.495112.737133.106158.274136.843196.411257.996300.868285.601343.847574.764382.185392.676429.525658.765537.487559.268501.065627.245458.211432.26348.437473.757338.538329.093194.679226.459176.585111.43168.273
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
us-gaap:NetCashProvidedByUsedInFinancingActivities ▁▁▁▁▅▇▂▇▄▅▂▅▂▂▂▁▂▂▂▂▂▃▃▂▃▄▇▂▅▃▂█▃▁▃▇▁▅▃▂▂▄▃▁▃▁-418.828-484.709-429.915-438.328690.4991052.743-151.4011056.831398.47527.062-112.69439.108-164.079-259.388-180.863-402.934-277.97-97.694-287.371-147.801-129.678-19.942-4.126-262.13613.9360.951980.227-169.647484.0549.865-142.0921349.669121.744-416.362-7.6761213.789-468.745594.69470.791-95.188-300.927380.756120.344-471.0056.917-354.307
us-gaap:ProceedsFromIssuanceOfLongTermDebt NANA0.00.01496.5561748.2210.01992.653750.01442.782550.01245.7730.00.00.4291190.0670.00.00.00.00.01000.00.0492.610.0798.8960.0-1199.9940.01199.9940.01247.8220.00.00.01295.0360.0699.6570.00.00.01295.450.00.00.00.0
us-gaap:RepaymentsOfLongTermDebt ▁▁▁▁█▁▁▄▁▄▁▃▁▄▁▆▁▁▃▁▁▄▁▁▁▁▁▁▁▄▁▁▁▁▁▁▃▁▁▁▃▂▁▁▂▁12.29556.49223.74227.3611353.7352.3891.912551.6111.912501.9131.912426.9131.912501.9131.912988.9661.9471.951451.9231.9662.003652.1481.9581.921.9271.9481.9111.9131.922551.9332.0661.9141.9131.9752.2133.078353.0913.0823.15793.089403.179228.1373.0673.105253.213.333
us-gaap:PaymentsOfDividends ████▇▇▇▇▇▇▇▇▆▆▆▅▃▃▃▃▃▃▃▃▃▃▂▂▂▂▂▂▂▂▁▁▁▁▁▁▁▁▁▁▁▁416.854416.229415.791415.614387.294386.667378.249367.845357.331354.203351.99339.575327.085316.408285.969283.687129.916129.842129.498129.595129.273129.235128.699128.082126.363126.053122.766121.367116.40983.27578.39378.36774.20173.78167.52667.67163.39763.37557.68357.98155.70555.65151.11648.95446.77146.701
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31

Common Stock Value

us-gaap:CommonStockValue

us-gaap:CommonStockValue


Common
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312009-12-31
Value4749000.04749000.04749000.04749000.04749000.04450000.04450000.04450000.04450000.04450000.04450000.04450000.04450000.04450000.04232000.04159000.04147000.02458000.02458000.02458000.02458000.02458000.02458000.02458000.02458000.02458000.02458000.02458000.02458000.02458000.02458000.02458000.02458000.02458000.02458000.02458000.02458000.01229000.01229000.01229000.01229000.01228000.01228000.01224000.0
Percentage of CommonStockValue100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

Preferred Stock Par Or Stated Value Per Share

us-gaap:PreferredStockParOrStatedValuePerShare

us-gaap:PreferredStockParOrStatedValuePerShare


Preferred
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302016-12-31
Value0.010.010.010.010.010.010.010.010.010.010.010.010.010.010.010.010.010
Percentage of PreferredStockParOrStatedValuePerShare100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0

Shares Issued

us-gaap:SharesIssued us-gaap:StatementEquityComponents

us-gaap:SharesIssued

us-gaap:CommonStock


Shares
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312009-12-312008-12-312007-12-31
Value474474474474474445445016445445445445445445445423415414245245245245245245245245245245245245245245245245245245245245122122122122122122122121121
Percentage of SharesIssued100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:PreferredStock


Shares
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302015-12-312014-12-31
Value0.020.020.020.020.020.02200.020.020.020.020.020.020.020.020.020.020.00.00.00.00.00.0
Percentage of SharesIssued0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

Common Stock Shares Issued

us-gaap:CommonStockSharesIssued

us-gaap:CommonStockSharesIssued


Common
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302011-12-312011-09-302011-06-302011-03-312010-12-312009-12-31
Value474474474474474445445445445445445445445445423415414245245245245245245245245245245245245245245245245245245245245122122122122122122
Percentage of CommonStockSharesIssued100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Preferred Stock Shares Issued

us-gaap:PreferredStockSharesIssued

us-gaap:PreferredStockSharesIssued


Preferred
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302016-12-31
Value20000.020000.020000.020000.020000.020000.020000.020000.020000.020000.020000.020000.020000.020000.020000.020000.020000.00
Percentage of PreferredStockSharesIssued100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0

Common Stock Shares Authorized

us-gaap:CommonStockSharesAuthorized

us-gaap:CommonStockSharesAuthorized


Common
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312009-12-31
Value12001200120012001200120012001200120012001200120012001200120012001200600600600600600600600600600600600600600600600600600600600600300300300300300300300
Percentage of CommonStockSharesAuthorized100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Common Stock Shares Outstanding

us-gaap:CommonStockSharesOutstanding

us-gaap:CommonStockSharesOutstanding


Common
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312009-12-31
Value445445444444444413413413412412411411411411388381380210210210210210209209208208208208207207206206206206204204205103103102103107106105
Percentage of CommonStockSharesOutstanding100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Weighted Average Number Of Diluted Shares Outstanding

us-gaap:WeightedAverageNumberOfDilutedSharesOutstanding

us-gaap:WeightedAverageNumberOfDilutedSharesOutstanding


Weighted
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-312017-09-302017-06-302017-03-312016-09-302016-06-302016-03-312015-09-302015-06-302015-03-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-312012-09-302012-06-302012-03-312011-09-302011-06-302011-03-312010-09-302010-06-302010-03-31
Value4464464454204154154154154144144123832142132122122112102102102102102102092082092090.2117840.1059260.105970.108030.1091790.1076510.1078380.10741
Percentage of WeightedAverageNumberOfDilutedSharesOutstanding100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Weighted Average Number Of Shares Outstanding Basic

us-gaap:WeightedAverageNumberOfSharesOutstandingBasic

us-gaap:WeightedAverageNumberOfSharesOutstandingBasic


Weighted
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-312017-09-302017-06-302017-03-312016-09-302016-06-302016-03-312015-09-302015-06-302015-03-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-312012-09-302012-06-302012-03-312011-09-302011-06-302011-03-312010-09-302010-06-302010-03-31
Value4464454454194144134134124124114093802112112112112102102102092092092092062062052050.2072920.1038090.1033030.1053370.107020.1064430.1063560.106132
Percentage of WeightedAverageNumberOfSharesOutstandingBasic100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Earnings Per Share Basic

us-gaap:EarningsPerShareBasic

us-gaap:EarningsPerShareBasic


Earnings
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value0.770.870.690.70.32-0.340.770.750.750.820.710.760.680.650.160.430.340.410.430.440.410.40.130.390.360.290.450.310.290.450.440.300.550.540.320.291.181.110.580.521.220.780.520.391.46
Percentage of EarningsPerShareBasic100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Earnings Per Share Diluted

us-gaap:EarningsPerShareDiluted

us-gaap:EarningsPerShareDiluted


Earnings
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value0.770.860.690.70.32-0.340.770.740.750.810.70.750.680.640.160.430.330.410.430.430.40.40.120.390.360.290.450.310.290.450.430.300.540.530.310.291.161.080.570.511.190.760.510.391.44
Percentage of EarningsPerShareDiluted100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Comprehensive Income Net Of Tax

us-gaap:ComprehensiveIncomeNetOfTax

us-gaap:ComprehensiveIncomeNetOfTax


Comprehensive
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value206472287306108-267.2433672242452552623332773165616074102909761763481815765695810218854121061353034150831759103646843167
Percentage of ComprehensiveIncomeNetOfTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Revenues6.114.811.214.16.6-12.513.89.910.09.28.49.89.410.21.55.52.73.73.44.12.94.31.84.33.83.22.32.21.93.24.51.50.43.03.71.01.44.42.00.51.72.72.02.31.64.3

Cost Of Revenue

us-gaap:CostOfRevenue

us-gaap:CostOfRevenue


Cost
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value236621211627126594012761791141416251956231825602175236830732229209121432021175115271195133313601603134322812583257126523488301028952917305524741980277131383061299232332812249123493304
Percentage of CostOfRevenue100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Revenues69.866.463.358.256.659.867.362.566.270.473.975.573.576.381.176.776.778.076.274.371.667.469.071.775.374.480.282.883.883.984.384.386.582.483.581.778.381.277.185.185.283.685.784.783.784.2

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

oke:NaturalGasLiquidsRegulated, oke:NaturalGasLiquids


Cost
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-06-302015-03-31
Value1531351451371171201311291161181261321241221371241181161191191121069885
Percentage of CostOfRevenue6.56.48.910.912.59.47.49.27.26.15.55.25.75.24.55.65.75.45.96.87.48.96.26.4
Percentage of Revenues4.54.35.76.37.15.65.05.74.84.34.03.94.24.03.64.34.44.24.55.15.36.04.64.7
Percentage of Revenues oke:NaturalGasLiquidsRegulated oke:NaturalGasLiquids25.423.80.025.424.527.70.034.138.536.70.042.042.140.90.042.441.139.30.040.037.937.943.540.8

oke:NaturalGasPipelinesRegulated, oke:NaturalGasPipelines


Cost
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-06-302015-03-31
Value3.8128.09.66.76.15.65.13.75.65.65.55.89.111108.314107.85.75.67.07.2
Percentage of CostOfRevenue0.20.60.50.80.70.50.30.40.20.30.20.20.30.40.40.50.40.70.50.40.40.50.40.5
Percentage of Revenues0.10.40.30.40.40.30.20.20.20.20.20.20.20.30.30.40.30.50.40.30.30.30.30.4
Percentage of Revenues oke:NaturalGasPipelinesRegulated oke:NaturalGasPipelines5.57.10.013.48.48.30.07.15.18.00.08.39.013.40.016.013.220.50.012.810.110.210.913.3

us-gaap:CostOfRevenue us-gaap:StatementBusinessSegments

oke:NaturalGasGatheringAndProcessing


Cost
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-06-302015-03-31
Value550555302207132202330210309450563542442492672566488488428336299266322330
Percentage of CostOfRevenue23.326.218.616.414.115.818.514.919.123.024.321.220.420.821.925.423.422.821.219.219.622.320.124.6
Percentage of Revenues16.217.411.89.58.09.512.49.312.616.218.016.015.015.917.719.517.917.816.214.314.115.015.218.3
Percentage of Revenues oke:NaturalGasGatheringAndProcessing63.866.10.045.244.144.90.044.353.264.90.068.663.269.60.072.471.373.90.065.762.961.670.272.6

oke:NaturalGasLiquids


Cost
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-06-302015-03-31
Value23992060163412899051278177614381629184621672544218322812987213620032048194516941525115615351228
Percentage of CostOfRevenue101.497.1100.5101.996.2100.199.2101.7100.294.493.599.4100.496.397.295.895.895.696.296.799.996.895.891.4
Percentage of Revenues70.864.563.659.354.559.866.763.566.366.469.175.073.873.578.873.573.574.573.371.971.565.272.268.1
Percentage of Revenues oke:NaturalGasLiquids80.078.90.070.467.872.20.075.778.679.90.084.183.584.70.085.485.385.60.083.181.577.883.182.1

oke:NaturalGasPipelines


Cost
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-06-302015-03-31
Value0.544101.7133.3890.1681.5390.8430.3811.6491.7555.5092.3842.6375.4549.434106.77316146.875.1123.9326.00514
Percentage of CostOfRevenue0.00.50.10.30.00.10.00.00.10.10.20.10.10.20.30.50.30.80.70.40.30.30.41.1
Percentage of Revenues0.00.30.10.20.00.10.00.00.10.10.20.10.10.20.20.40.20.60.60.30.20.20.30.8
Percentage of Revenues oke:NaturalGasPipelines0.54.00.02.90.11.30.00.31.41.50.02.32.65.00.010.06.915.50.07.55.84.67.517.3

oke:TotalSegments


Cost
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-31
Value2950262519381500103714822108164919402299273630892629277936692713249925532388203718301427
Percentage of CostOfRevenue124.7123.8119.2118.6110.3116.1117.7116.6119.4117.5118.0120.7120.8117.4119.4121.7119.5119.1118.2116.3119.8119.4
Percentage of Revenues87.182.275.469.062.569.479.172.979.082.787.291.088.889.696.893.491.792.990.086.485.880.4
Percentage of Revenues oke:TotalSegments74.271.00.062.359.063.30.066.070.073.60.078.877.079.20.080.079.880.80.077.175.171.2

us-gaap:IntersegmentElimination


Cost
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-31
Value-583.97-504.128-311.676-234.901-97.085-205.535-316.881-234.798-315.173-342.964-418.189-528.936-453.29-411.122-595.755-484.393-408.243-409.837-367.004-285.894-303.014-231.444-265.431-230.182-261.331-230.358
Percentage of CostOfRevenue-24.7-23.8-19.2-18.6-10.3-16.1-17.7-16.6-19.4-17.5-18.0-20.7-20.8-17.4-19.4-21.7-19.5-19.1-18.2-16.3-19.8-19.4-19.9-16.9-16.3-17.1
Percentage of Revenues-17.2-15.8-12.1-10.8-5.8-9.6-11.9-10.4-12.8-12.3-13.3-15.6-15.3-13.3-15.7-16.7-15.0-14.9-13.8-12.1-14.2-13.0-13.7-12.1-12.3-12.8
Percentage of Revenues us-gaap:IntersegmentElimination99.6100.00.0100.1100.2100.40.099.9100.2100.10.0100.099.8100.70.099.9100.299.80.0100.1100.1100.20.0100.1100.1100.2

Gains Losses On Extinguishment Of Debt

us-gaap:GainsLossesOnExtinguishmentOfDebt

us-gaap:GainsLossesOnExtinguishmentOfDebt


Gains
Period End2020-12-312020-09-302020-06-302020-03-31
Value0.12.24.315
Percentage of GainsLossesOnExtinguishmentOfDebt100.0100.0100.0100.0
Percentage of Revenues0.00.10.30.7

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

us-gaap:IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest

us-gaap:IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest


Income
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-30
Value452508403418177-197.252418406410415389416369341316263219241249249232225-13.62720219913325615219121923918780233254207189293333194170282202150117
Percentage of IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Revenues13.315.915.719.310.7-9.215.718.016.714.912.412.312.511.08.39.18.18.89.410.610.912.7-0.710.79.47.49.04.96.26.95.85.22.46.66.96.97.58.68.25.44.97.36.25.14.2

Income Tax Expense Benefit

us-gaap:IncomeTaxExpenseBenefit

us-gaap:IncomeTaxExpenseBenefit


Income
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value1101229510643-55.3959897987796102877525197435454555250123848375637421455391.36267584240737133368455293197
Percentage of IncomeTaxExpenseBenefit100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Revenues3.23.83.74.92.6-2.63.74.34.02.83.13.03.02.46.63.31.62.02.12.32.52.80.72.02.32.12.01.21.40.51.31.10.01.91.61.41.62.21.70.91.02.21.71.01.12.5

Interest Expense

us-gaap:InterestExpense

us-gaap:InterestExpense


Interest
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value184185176176218140129129117115118121113115124126118116114118118118110106102968686889490818180837171756873757969707576
Percentage of InterestExpense100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Revenues5.55.86.98.113.26.64.95.74.84.23.83.63.83.73.34.44.34.24.35.05.66.75.75.64.85.43.02.82.93.02.22.32.42.32.32.42.82.21.72.12.12.12.12.42.72.0

Net Income Loss Available To Common Stockholders Basic

us-gaap:NetIncomeLossAvailableToCommonStockholdersBasic

us-gaap:NetIncomeLossAvailableToCommonStockholdersBasic


Net
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-30
Value341385307312134-142.132319308311336292312280264621657187909285
Percentage of NetIncomeLossAvailableToCommonStockholdersBasic100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Revenues10.112.112.014.48.1-6.712.013.612.712.19.39.29.58.51.75.72.63.23.43.94.0

Operating Income Loss

us-gaap:OperatingIncomeLoss

us-gaap:OperatingIncomeLoss


Operating
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value611664538550355-83.469487482476468471495448419397351316314329329315311242284272196306291251294294230128273299242234325363248216330241186178337
Percentage of OperatingIncomeLoss100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Revenues18.020.821.025.321.4-3.918.321.319.416.915.014.615.113.510.512.111.611.412.414.014.817.612.515.012.810.910.89.38.29.37.16.43.87.78.28.09.39.58.96.96.28.57.36.46.48.6

Other Comprehensive Income Loss Net Of Tax

us-gaap:OtherComprehensiveIncomeLossNetOfTax

us-gaap:OtherComprehensiveIncomeLossNetOfTax


Other
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-31
Value-135.84785-20.831-5.715-25.517-125.38647-84.708-66.872-81.285-30.10120-3.89751-6.759-5.6865.474444711-85.139-28.7839.432.0226.655-18.625-23.76411-19.413-8.62496-9.48643-13.88119-57.044-41.07140
Percentage of OtherComprehensiveIncomeLossNetOfTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Revenues-4.02.7-0.8-0.3-1.5-5.91.8-3.7-2.7-2.9-1.00.6-0.11.7-0.2-0.20.21.61.80.5-4.0-1.60.50.10.3-1.0-0.80.4-0.6-0.32.3-0.31.3-0.40.5-1.9-1.61.2

us-gaap:OtherComprehensiveIncomeLossNetOfTax us-gaap:StatementEquityComponents

us-gaap:AccumulatedOtherComprehensiveIncome


Other
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-31
Value-135.84785-5.715-25.517-125.38647-84.708-66.872-81.285-30.10120-3.89751-6.759-5.6863.265150.0014.895-24.632-7.3728.87-0.7784.558-3.539-28.6975.471-3.2148.68597-7.52211-6.355
Percentage of OtherComprehensiveIncomeLossNetOfTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.059.634.70.043.428.925.694.1-38.568.519.0120.847.016.6-100.7101.079.325.845.8
Percentage of Revenues-4.02.7-0.3-1.5-5.91.8-3.7-2.7-2.9-1.00.6-0.11.7-0.2-0.20.10.60.00.2-1.2-0.40.5-0.00.2-0.2-1.00.2-0.10.32.4-0.20.3-0.2
Percentage of Revenues us-gaap:AccumulatedOtherComprehensiveIncome0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

Preferred Stock Dividends Income Statement Impact

us-gaap:PreferredStockDividendsIncomeStatementImpact

us-gaap:PreferredStockDividendsIncomeStatementImpact


Preferred
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-30
Value275000.0275000.0275000.0275000.0275000.0275000.0275000.0275000.0275000.0275000.0275000.0275000.0275000.0275000.0274000.0276000.0217000.00000
Percentage of PreferredStockDividendsIncomeStatementImpact100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.00.00.00.0
Percentage of Revenues0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

Profit Loss

us-gaap:ProfitLoss

us-gaap:ProfitLoss


Profit
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value342386308312134-141.85732030931133729231328226664166175186194194179174-28.216160150952011141402061841477916519516414923326416013419914712086186
Percentage of ProfitLoss100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Revenues10.112.112.014.48.1-6.612.013.712.712.19.39.29.58.61.75.76.56.87.38.28.49.9-1.58.57.15.37.13.74.66.54.44.12.44.75.45.45.96.86.54.53.85.24.54.13.14.8

us-gaap:ProfitLoss us-gaap:StatementEquityComponents

us-gaap:RetainedEarnings


Profit
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-31
Value342386312134-141.85730931133729231328126463165718790928583258276609464619390620.91911211165601221156055130
Percentage of ProfitLoss100.0100.0100.0100.0100.0100.0100.0100.0100.099.899.699.497.399.540.746.946.547.447.847.7-90.451.150.763.546.956.443.845.349.342.21.267.956.939.540.952.643.437.540.965.3
Percentage of Revenues10.112.114.48.1-6.613.712.712.19.39.29.58.51.75.72.63.23.43.94.04.71.34.33.63.43.32.12.03.02.21.70.03.23.02.22.43.62.81.71.63.4
Percentage of Revenues us-gaap:RetainedEarnings0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

Revenue From Contract With Customer Excluding Assessed Tax

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

us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax

oke:GatheringandExchangeServicesRevenue, oke:NaturalGasGatheringAndProcessing


Revenue
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value3431313635373842433940414238
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Revenues1.01.01.21.72.21.81.41.91.81.41.31.21.41.2
Percentage of Revenues oke:GatheringandExchangeServicesRevenue oke:NaturalGasGatheringAndProcessing0.00.00.00.00.00.00.00.00.00.00.00.00.00.0

oke:GatheringandExchangeServicesRevenue, oke:NaturalGasLiquids


Revenue
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value129113117132118120104105105981081169683
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax379.7357.3372.3362.6328.7317.7273.8245.8243.2247.9265.1284.3225.4216.7
Percentage of Revenues3.83.54.66.17.15.63.94.64.33.53.53.43.32.7
Percentage of Revenues oke:GatheringandExchangeServicesRevenue oke:NaturalGasLiquids0.00.00.00.00.00.00.00.00.00.00.00.00.00.0

oke:GatheringandExchangeServicesRevenue, oke:TotalSegments


Revenue
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value163144149168154158142147149138149157139121
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax479.7457.3472.3462.6428.7417.7373.8345.8343.2347.9365.1384.3325.4316.7
Percentage of Revenues4.84.55.87.89.37.45.46.56.15.04.84.74.73.9
Percentage of Revenues oke:GatheringandExchangeServicesRevenue oke:TotalSegments0.00.00.00.00.00.00.00.00.00.00.00.00.00.0

oke:NGLandCondensateSales, oke:NaturalGasGatheringAndProcessing


Revenue
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value566491320239109219334244312332413501447413
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax1659.01552.11013.0657.8304.8579.7874.7572.3718.4836.21012.71219.31046.31075.1
Percentage of Revenues16.715.412.511.06.610.312.610.812.712.013.214.815.113.3
Percentage of Revenues oke:NGLandCondensateSales oke:NaturalGasGatheringAndProcessing0.00.00.00.00.00.00.00.00.00.00.00.00.00.0

oke:NGLandCondensateSales, oke:NaturalGasLiquids


Revenue
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value28292414197916581174159620841746192121582435286124692552
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax8288.57620.96266.04547.93267.44208.85453.24081.44413.75430.35960.66963.15769.86642.8
Percentage of Revenues83.575.677.076.370.774.778.377.278.277.677.784.383.482.3
Percentage of Revenues oke:NGLandCondensateSales oke:NaturalGasLiquids0.00.00.00.00.00.00.00.00.00.00.00.00.00.0

oke:NGLandCondensateSales, oke:TotalSegments


Revenue
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value33952906229918971284181624181991223424902849336329172965
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax9947.59173.07278.95205.73572.24788.56327.94653.75132.16266.56973.38182.46816.17717.9
Percentage of Revenues100.291.089.587.377.385.090.888.090.989.690.899.198.595.6
Percentage of Revenues oke:NGLandCondensateSales oke:TotalSegments0.00.00.00.00.00.00.00.00.00.00.00.00.00.0

oke:ResidueNaturalGasSales, oke:NaturalGasGatheringAndProcessing


Revenue
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value257312253178150189240185221319375245208254
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax755.2985.4800.8489.6419.7498.3629.1433.0508.4802.8917.9597.2487.4663.6
Percentage of Revenues7.69.89.88.29.18.89.08.29.011.512.07.27.08.2
Percentage of Revenues oke:ResidueNaturalGasSales oke:NaturalGasGatheringAndProcessing0.00.00.00.00.00.00.00.00.00.00.00.00.00.0

oke:ResidueNaturalGasSales, oke:NaturalGasPipelines


Revenue
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value0.0041152.663.9980.02.0350.0020.2310.0410.973.9110.7630.1794.919
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax0.0364.48.411.00.05.40.00.50.12.49.61.90.412.8
Percentage of Revenues0.03.60.10.20.00.10.00.00.00.00.10.00.00.2
Percentage of Revenues oke:ResidueNaturalGasSales oke:NaturalGasPipelines0.00.00.00.00.00.00.00.00.00.00.00.00.00.0

oke:ResidueNaturalGasSales, oke:TotalSegments


Revenue
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value257427255182150191240185221320378246208259
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax755.21349.8809.3500.5419.7503.7629.1433.5508.5805.2927.5599.1487.8676.4
Percentage of Revenues7.613.49.98.49.18.99.08.29.011.512.17.37.18.4
Percentage of Revenues oke:ResidueNaturalGasSales oke:TotalSegments0.00.00.00.00.00.00.00.00.00.00.00.00.00.0

oke:TransportationandStorageRevenue, oke:NaturalGasLiquids


Revenue
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value3748513940505646425255454553
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax110.9153.8163.0109.1113.7133.8146.8108.498.0131.7135.3110.1105.2139.2
Percentage of Revenues1.11.52.01.82.52.42.12.11.71.91.81.31.51.7
Percentage of Revenues oke:TransportationandStorageRevenue oke:NaturalGasLiquids0.00.00.00.00.00.00.00.00.00.00.00.00.00.0

oke:TransportationandStorageRevenue, oke:NaturalGasPipelines


Revenue
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value112132116113121118148108105103104989398
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax329.1419.6370.0310.1338.7312.0389.0253.3242.8260.4255.4238.5217.9255.9
Percentage of Revenues3.34.24.55.27.35.55.64.84.33.73.32.93.23.2
Percentage of Revenues oke:TransportationandStorageRevenue oke:NaturalGasPipelines0.00.00.00.00.00.00.00.00.00.00.00.00.00.0

oke:TransportationandStorageRevenue, oke:TotalSegments


Revenue
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value150181168152162169204154148155159143138151
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax440.0573.3533.0419.2452.5445.8535.8361.7340.8392.0390.7348.6323.1395.1
Percentage of Revenues4.45.76.67.09.87.97.76.86.05.65.14.24.74.9
Percentage of Revenues oke:TransportationandStorageRevenue oke:TotalSegments0.00.00.00.00.00.00.00.00.00.00.00.00.00.0

Revenues

us-gaap:Revenues

us-gaap:Revenues


Revenues
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value3388319425702174166021362663226324572779313633932960310237922906272527492654235721341774193018982128180528443120306631634140357133493541365930282529341440713595351438663280294228073923
Percentage of Revenues100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Revenues100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:Revenues oke:IntersegmentRevenuesbyName, us-gaap:StatementBusinessSegments

oke:NaturalGasGatheringandProcessingIntersegment, oke:NaturalGasGatheringAndProcessing


Revenuesoke:
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value555481308235108213302244317335402519448397
Percentage of Revenues16.415.112.010.86.510.011.310.812.912.112.815.315.112.8
Percentage of Revenues16.415.112.010.86.510.011.310.812.912.112.815.315.112.8
Percentage of Revenues oke:NaturalGasGatheringandProcessingIntersegment oke:NaturalGasGatheringAndProcessing100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

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

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


Revenuesoke:
Period End2021-06-302020-06-30
Value557432
Percentage of Revenues16.426.0
Percentage of Revenues16.426.0
Percentage of Revenues oke:NaturalGasLiquidsRegulated us-gaap:OperatingSegments oke:NaturalGasLiquids100.0100.0

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

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


Revenuesoke:
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-06-302015-03-31
Value516493495432378347315267270315276255253264250249252250253258230186165
Percentage of Revenues16.219.222.826.017.713.013.910.99.710.08.18.68.27.08.69.19.29.410.712.113.08.89.2
Percentage of Revenues16.219.222.826.017.713.013.910.99.710.08.18.68.27.08.69.19.29.410.712.113.08.89.2
Percentage of Revenues oke:NaturalGasLiquidsRegulated us-gaap:OperatingSegments oke:NaturalGasLiquids100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

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

oke:NaturalGasLiquidsRegulated, oke:NaturalGasLiquids


Revenuesoke:
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-06-302015-03-31
Value603570546541477435400379303323289316294300320293289296296299297281227209
Percentage of Revenues17.817.921.224.928.720.415.016.812.311.69.29.39.99.78.510.110.610.811.212.713.915.910.711.6
Percentage of Revenues17.817.921.224.928.720.415.016.812.311.69.29.39.99.78.510.110.610.811.212.713.915.910.711.6
Percentage of Revenues oke:NaturalGasLiquidsRegulated oke:NaturalGasLiquids100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

oke:NaturalGasPipelinesRegulated, oke:NaturalGasPipelines


Revenuesoke:
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-06-302015-03-31
Value6918172717973707272706865646867656268666156546454
Percentage of Revenues2.05.72.83.34.83.52.73.22.92.52.21.92.22.21.82.32.32.52.52.62.73.13.03.0
Percentage of Revenues2.05.72.83.34.83.52.73.22.92.52.21.92.22.21.82.32.32.52.52.62.73.13.03.0
Percentage of Revenues oke:NaturalGasPipelinesRegulated oke:NaturalGasPipelines100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:Revenues us-gaap:MajorCustomers

oke:NoncustomerDomain


Revenuesus-gaap:
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value-76.0-132.2-37.24.018809.789182215-17.7-5.4-9.0
Percentage of Revenues-2.2-4.1-1.40.21.13.80.43.90.80.80.5-0.5-0.2-0.3
Percentage of Revenues-2.2-4.1-1.40.21.13.80.43.90.80.80.5-0.5-0.2-0.3
Percentage of Revenues oke:NoncustomerDomain100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:Revenues us-gaap:ProductOrService

oke:CommoditySales


Revenuesus-gaap:
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-30
Value3074283622501852134318082348194721462472281630832675
Percentage of Revenues90.788.887.685.280.984.688.286.187.489.089.890.990.4
Percentage of Revenues90.788.887.685.280.984.688.286.187.489.089.890.990.4
Percentage of Revenues oke:CommoditySales100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

oke:GatheringandExchangeServicesRevenue


Revenuesus-gaap:
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value163144149168154158142147149138149157139121
Percentage of Revenues4.84.55.87.89.37.45.46.56.15.04.84.74.73.9
Percentage of Revenues4.84.55.87.89.37.45.46.56.15.04.84.74.73.9
Percentage of Revenues oke:GatheringandExchangeServicesRevenue100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

oke:NGLandCondensateSales


Revenuesus-gaap:
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value28132406199216731195161721071761192321522439283624682557
Percentage of Revenues83.075.377.577.072.075.779.177.878.377.477.883.683.482.4
Percentage of Revenues83.075.377.577.072.075.779.177.878.377.477.883.683.482.4
Percentage of Revenues oke:NGLandCondensateSales100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

oke:Other


Revenuesus-gaap:
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value6.853378.4496.5765.425.679-23.08416171614121011
Percentage of Revenues0.21.20.30.30.30.3-0.90.70.70.60.50.40.40.4
Percentage of Revenues0.21.20.30.30.30.3-0.90.70.70.60.50.40.40.4
Percentage of Revenues oke:Other100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

oke:ResidueNaturalGasSales


Revenuesus-gaap:
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value257427255176146190239184221320376246205262
Percentage of Revenues7.613.49.98.18.88.99.08.29.011.512.07.37.08.5
Percentage of Revenues7.613.49.98.18.88.99.08.29.011.512.07.37.08.5
Percentage of Revenues oke:ResidueNaturalGasSales100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

oke:Services


Revenuesus-gaap:
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-30
Value314358319322317328315315310306319310285
Percentage of Revenues9.311.212.414.819.115.411.813.912.611.010.29.19.6
Percentage of Revenues9.311.212.414.819.115.411.813.912.611.010.29.19.6
Percentage of Revenues oke:Services100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

oke:TransportationandStorageRevenue


Revenuesus-gaap:
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value146178164149159165196152145153156140135149
Percentage of Revenues4.35.66.46.99.67.77.46.75.95.55.04.24.64.8
Percentage of Revenues4.35.66.46.99.67.77.46.75.95.55.04.24.64.8
Percentage of Revenues oke:TransportationandStorageRevenue100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

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

oke:NGLandCondensateSales, us-gaap:IntersegmentElimination


Revenuesus-gaap:
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value-582.14-500.064-307.681-224.731-88.967-199.472-311.466-230.08-310.527-338.351-410.478-526.398-448.556-408.91
Percentage of Revenues-17.2-15.7-12.0-10.3-5.4-9.3-11.7-10.2-12.6-12.2-13.1-15.5-15.2-13.2
Percentage of Revenues-17.2-15.7-12.0-10.3-5.4-9.3-11.7-10.2-12.6-12.2-13.1-15.5-15.2-13.2
Percentage of Revenues oke:NGLandCondensateSales us-gaap:IntersegmentElimination100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

oke:Other, oke:NaturalGasGatheringAndProcessing


Revenuesus-gaap:
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value5.1284.06.1984.6443.3873.0752.5263.1824.5543.5514.6343.5171.6711.408
Percentage of Revenues0.20.10.20.20.20.10.10.10.20.10.10.10.10.0
Percentage of Revenues0.20.10.20.20.20.10.10.10.20.10.10.10.10.0
Percentage of Revenues oke:Other oke:NaturalGasGatheringAndProcessing100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

oke:Other, oke:NaturalGasLiquids


Revenuesus-gaap:
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value2.386332.4132.112.0792.592.6492.2912.4812.5412.6142.3082.9312.963
Percentage of Revenues0.11.00.10.10.10.10.10.10.10.10.10.10.10.1
Percentage of Revenues0.11.00.10.10.10.10.10.10.10.10.10.10.10.1
Percentage of Revenues oke:Other oke:NaturalGasLiquids100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

oke:Other, oke:NaturalGasPipelines


Revenuesus-gaap:
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value0.1030.4120.2760.2510.2810.384-32.2051211118.5596.46.3366.654
Percentage of Revenues0.00.00.00.00.00.0-1.20.60.50.40.30.20.20.2
Percentage of Revenues0.00.00.00.00.00.0-1.20.60.50.40.30.20.20.2
Percentage of Revenues oke:Other oke:NaturalGasPipelines100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

oke:Other, oke:TotalSegments


Revenuesus-gaap:
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value7.617378.8877.0055.7476.049-27.0318181815121011
Percentage of Revenues0.21.20.30.30.30.3-1.00.80.80.60.50.40.40.4
Percentage of Revenues0.21.20.30.30.30.3-1.00.80.80.60.50.40.40.4
Percentage of Revenues oke:Other oke:TotalSegments100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

oke:Other, us-gaap:IntersegmentElimination


Revenuesus-gaap:
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value-0.764-0.342-0.438-0.429-0.327-0.373.946-1.798-1.704-1.731-1.252-0.079-0.0430.481
Percentage of Revenues-0.0-0.0-0.0-0.0-0.0-0.00.1-0.1-0.1-0.1-0.0-0.0-0.00.0
Percentage of Revenues-0.0-0.0-0.0-0.0-0.0-0.00.1-0.1-0.1-0.1-0.0-0.0-0.00.0
Percentage of Revenues oke:Other us-gaap:IntersegmentElimination100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

oke:ResidueNaturalGasSales, us-gaap:IntersegmentElimination


Revenuesus-gaap:
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value0.0-5.897-3.931-1.032-0.851-0.5670.00.0-2.0540.0-3.0282.25
Percentage of Revenues0.0-0.3-0.2-0.0-0.0-0.00.00.0-0.10.0-0.10.1
Percentage of Revenues0.0-0.3-0.2-0.0-0.0-0.00.00.0-0.10.0-0.10.1
Percentage of Revenues oke:ResidueNaturalGasSales us-gaap:IntersegmentElimination0.0100.0100.0100.0100.0100.00.00.0100.00.0100.0100.0

oke:TransportationandStorageRevenue, us-gaap:IntersegmentElimination


Revenuesus-gaap:
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value-3.506-3.535-3.566-3.597-3.627-3.809-8.068-2.594-2.463-2.521-2.647-2.37-2.495-2.094
Percentage of Revenues-0.1-0.1-0.1-0.2-0.2-0.2-0.3-0.1-0.1-0.1-0.1-0.1-0.1-0.1
Percentage of Revenues-0.1-0.1-0.1-0.2-0.2-0.2-0.3-0.1-0.1-0.1-0.1-0.1-0.1-0.1
Percentage of Revenues oke:TransportationandStorageRevenue us-gaap:IntersegmentElimination100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:Revenues us-gaap:StatementBusinessSegments

oke:NaturalGasGatheringAndProcessing


Revenuesus-gaap:
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-31
Value863839610459299449615476582694834791700707896782685661630512476432487434460455704777723762598533482437
Percentage of Revenues25.526.323.821.118.121.123.121.023.725.026.623.323.722.823.626.925.224.023.821.722.324.325.222.921.625.224.824.923.624.114.514.914.412.4
Percentage of Revenues25.526.323.821.118.121.123.121.023.725.026.623.323.722.823.626.925.224.023.821.722.324.325.222.921.625.224.824.923.624.114.514.914.412.4
Percentage of Revenues oke:NaturalGasGatheringAndProcessing100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

oke:NaturalGasLiquids


Revenuesus-gaap:
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-31
Value2999261021511832133517702247190020722311260130262613269233822501234923912277203918711487162316111848149624332734266527113147287424912264
Percentage of Revenues88.581.783.784.380.482.984.484.084.383.182.989.288.386.889.286.186.287.085.886.587.783.884.184.986.982.985.687.686.985.776.080.574.463.9
Percentage of Revenues88.581.783.784.380.482.984.484.084.383.182.989.288.386.889.286.186.287.085.886.587.783.884.184.986.982.985.687.686.985.776.080.574.463.9
Percentage of Revenues oke:NaturalGasLiquids100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

oke:NaturalGasPipelines


Revenuesus-gaap:
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-31
Value11224811911712212011612111711611610599109108106971061139288858582808384798110488757586
Percentage of Revenues3.37.84.75.47.35.74.45.44.84.23.73.13.43.52.93.73.63.94.33.94.14.84.44.43.84.63.02.52.73.32.12.12.22.4
Percentage of Revenues3.37.84.75.47.35.74.45.44.84.23.73.13.43.52.93.73.63.94.33.94.14.84.44.43.84.63.02.52.73.32.12.12.22.4
Percentage of Revenues oke:NaturalGasPipelines100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

oke:TotalSegments


Revenuesus-gaap:
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-31
Value3975369828822408175723412980249827723122355339223414351043873391313331603020264324362005
Percentage of Revenues117.3115.8112.1110.8105.8109.6111.9110.4112.8112.3113.3115.6115.3113.2115.7116.7115.0114.9113.8112.1114.2113.0
Percentage of Revenues117.3115.8112.1110.8105.8109.6111.9110.4112.8112.3113.3115.6115.3113.2115.7116.7115.0114.9113.8112.1114.2113.0
Percentage of Revenues oke:TotalSegments100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:IntersegmentElimination


Revenuesus-gaap:
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-31
Value-586.41-503.941-311.685-234.654-96.852-204.683-316.439-235.039-314.694-342.603-416.431-528.847-454.122-408.294-595.78-484.979-407.577-410.467-366.384-285.645-302.714-230.915-265.26-229.841-260.997-229.958-377.805-471.337-403.778-415.434-118.35-114.729-141.476-159.515-121.644-87.456-85.654-158.06
Percentage of Revenues-17.3-15.8-12.1-10.8-5.8-9.6-11.9-10.4-12.8-12.3-13.3-15.6-15.3-13.2-15.7-16.7-15.0-14.9-13.8-12.1-14.2-13.0-13.7-12.1-12.3-12.7-13.3-15.1-13.2-13.1-2.9-3.2-4.2-4.5-3.3-2.9-3.4-4.6
Percentage of Revenues-17.3-15.8-12.1-10.8-5.8-9.6-11.9-10.4-12.8-12.3-13.3-15.6-15.3-13.2-15.7-16.7-15.0-14.9-13.8-12.1-14.2-13.0-13.7-12.1-12.3-12.7-13.3-15.1-13.2-13.1-2.9-3.2-4.2-4.5-3.3-2.9-3.4-4.6
Percentage of Revenues us-gaap:IntersegmentElimination100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Assets

us-gaap:Assets

us-gaap:Assets


Assets
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302009-12-31
Value23437231792307822780229922196921812213351975118934182311791116913164321684516764166721606716138159821582215501154461550815651155331530414312143841365317707176101584215446158551536413817142521369613171130361303912499119291211912827
Percentage of Assets100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:Assets us-gaap:StatementBusinessSegments

oke:NaturalGasGatheringAndProcessing


Assetsus-gaap:
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-31
Value65646535649964376426637467956546634362086078581155855462549553855310529653205268522251965123520650074887472744154276404839493808334631463040
Percentage of Assets28.028.228.228.327.929.031.230.732.132.833.332.433.033.232.632.131.933.033.033.033.033.533.233.632.031.530.930.929.729.722.321.621.120.419.2
Percentage of Assets28.028.228.228.327.929.031.230.732.132.833.332.433.033.232.632.131.933.033.033.033.033.533.233.632.031.530.930.929.729.722.321.621.120.419.2
Percentage of Assets oke:NaturalGasGatheringAndProcessing100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

oke:NaturalGasLiquids


Assetsus-gaap:
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-31
Value143091394413636134491318312682125511166210694102209663963288988370878285158168819483478257828980168017804181398106808273377363686169386610600856475620
Percentage of Assets61.160.259.159.057.357.757.554.754.154.053.053.852.650.952.150.849.051.051.751.752.451.751.951.952.052.252.851.351.250.339.237.537.936.635.4
Percentage of Assets61.160.259.159.057.357.757.554.754.154.053.053.852.650.952.150.849.051.051.751.752.451.751.951.952.052.252.851.351.250.339.237.537.936.635.4
Percentage of Assets oke:NaturalGasLiquids100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

oke:NaturalGasPipelines


Assetsus-gaap:
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-31
Value21102096210020822064208920942083208321382131210920732060205520401951194519461912185618471844183718411807182318321852184818171786179217991812
Percentage of Assets9.09.09.19.19.09.59.69.810.611.311.711.812.312.512.212.211.712.112.112.011.711.911.911.911.811.611.912.812.913.510.310.111.311.611.4
Percentage of Assets9.09.09.19.19.09.59.69.810.611.311.711.812.312.512.212.211.712.112.112.011.711.911.911.911.811.611.912.812.913.510.310.111.311.611.4
Percentage of Assets oke:NaturalGasPipelines100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

oke:TotalSegments


Assetsus-gaap:
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312014-12-31
Value229842257622236219692167321146214412029219122185681787317553165561589316332159411543015436156141543815367150591499314890
Percentage of Assets98.197.496.396.494.396.398.395.196.898.198.098.097.996.797.095.192.696.196.896.697.197.297.197.3
Percentage of Assets98.197.496.396.494.396.398.395.196.898.198.098.097.996.797.095.192.696.196.896.697.197.297.197.3
Percentage of Assets oke:TotalSegments100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:IntersegmentElimination


Assetsus-gaap:
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-31
Value452603842811131882237010436293663573583565385138231241630523543455441460422662730670726891894639786804892867862737868794
Percentage of Assets1.92.63.73.65.73.71.74.93.21.92.02.02.13.33.04.97.43.93.23.42.92.83.02.74.24.74.45.16.26.63.64.55.15.85.55.65.36.15.8
Percentage of Assets1.92.63.73.65.73.71.74.93.21.92.02.02.13.33.04.97.43.93.23.42.92.83.02.74.24.74.45.16.26.63.64.55.15.85.55.65.36.15.8
Percentage of Assets us-gaap:IntersegmentElimination100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Liabilities And Stockholders Equity

us-gaap:LiabilitiesAndStockholdersEquity

us-gaap:LiabilitiesAndStockholdersEquity


Liabilities
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312009-12-31
Value2343723179230782278022992219692181221335197511893418231179111691316432168451676416672160671613815982158221550115446155081565115533153041431214384136531770717610158421544615855153641381714252136961317113036130391249912827
Percentage of LiabilitiesAndStockholdersEquity100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Stockholders Equity

us-gaap:StockholdersEquity

us-gaap:StockholdersEquity


Stockholders
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312009-12-31
Value5910609660426146624055606225621863486442657966526664670155275359540723818821423728633541451753059262365658423372189208521342129206520892256223821852217249924482207
Percentage of StockholdersEquity100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets25.226.326.227.027.125.328.529.132.134.036.137.139.440.832.832.032.41.51.21.31.51.92.22.73.33.43.94.44.64.313.212.413.213.813.413.415.115.816.316.617.019.219.617.2

us-gaap:StockholdersEquity us-gaap:StatementEquityComponents

us-gaap:AccumulatedOtherComprehensiveIncome


Stockholders
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-30
Value-601.443-465.596-551.449-530.618-524.903-499.386-374.0-421.104-336.396-269.524-188.239-158.138-178.589
Percentage of StockholdersEquity-10.2-7.6-9.1-8.6-8.4-9.0-6.0-6.8-5.3-4.2-2.9-2.4-2.7
Percentage of Assets-2.6-2.0-2.4-2.3-2.3-2.3-1.7-2.0-1.7-1.4-1.0-0.9-1.1
Percentage of Assets us-gaap:AccumulatedOtherComprehensiveIncome0.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:AdditionalPaidInCapital


Stockholders
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-30
Value7247730573537448754969897403744874957527761576627699
Percentage of StockholdersEquity122.6119.8121.7121.2121.0125.7118.9119.8118.1116.9115.7115.2115.5
Percentage of Assets30.931.531.932.732.831.833.934.937.939.841.842.845.5
Percentage of Assets us-gaap:AdditionalPaidInCapital0.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:CommonStock


Stockholders
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-30
Value4.7494.7494.7494.7494.7494.454.454.454.454.454.454.454.45
Percentage of StockholdersEquity0.10.10.10.10.10.10.10.10.10.10.10.10.1
Percentage of Assets0.00.00.00.00.00.00.00.00.00.00.00.00.0
Percentage of Assets us-gaap:CommonStock0.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:TreasuryStock


Stockholders
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-30
Value-740.254-747.462-764.298-776.503-781.489-792.019-808.394-812.539-815.376-820.767-851.806-856.227-860.935
Percentage of StockholdersEquity-12.5-12.3-12.6-12.6-12.5-14.2-13.0-13.1-12.8-12.7-12.9-12.9-12.9
Percentage of Assets-3.2-3.2-3.3-3.4-3.4-3.6-3.7-3.8-4.1-4.3-4.7-4.8-5.1
Percentage of Assets us-gaap:TreasuryStock0.00.00.00.00.00.00.00.00.00.00.00.00.0

Assets Current

us-gaap:AssetsCurrent

us-gaap:AssetsCurrent


Assets
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312009-12-31
Value22351997186917212179148814701967140113421398180714331290176415181447137814291369128199197595212631321130717122059165623702882188919492764295618072609231823122529279523792588
Percentage of AssetsCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets9.58.68.17.69.56.86.79.27.17.17.710.18.57.910.59.18.78.68.98.68.16.46.36.18.18.58.512.014.312.113.416.411.912.617.419.213.118.316.917.619.421.419.020.2

Cash And Cash Equivalents At Carrying Value

us-gaap:CashAndCashEquivalentsAtCarryingValue

us-gaap:CashAndCashEquivalentsAtCarryingValue


Cash
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312008-12-312007-12-31
Value37440252444794553120673273271184151737113323102482371801379738226239172151358210149779331435839781147816514847787031501031672951019
Percentage of CashAndCashEquivalentsAtCarryingValue100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets1.61.72.32.04.12.40.13.21.40.10.10.50.10.10.20.12.01.91.51.51.10.90.60.21.41.51.11.12.51.50.84.40.20.93.76.40.85.50.51.13.76.70.20.40.90.00.20.00.0

Receivables Net Current

us-gaap:ReceivablesNetCurrent

us-gaap:ReceivablesNetCurrent


Receivables
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312009-12-31
Value1091909829717608497835718669812818108593484412029397497348727376725215935866846287459711097883154911661158126113499847931154133911411125128013321437
Percentage of ReceivablesNetCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets4.73.93.63.22.62.33.83.43.44.34.56.15.55.17.15.64.54.65.44.64.23.43.83.84.44.04.96.87.66.58.86.67.38.28.56.45.78.19.88.78.69.810.711.2

Inventory Net

us-gaap:InventoryNet

us-gaap:InventoryNet


Inventory
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312009-12-31
Value454369227300201131304283184243296426285185342314200193140217245156128142150218134338335231417664434302517644561299549658574407708583
Percentage of InventoryNet100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets1.91.61.01.30.90.61.41.30.91.31.62.41.71.12.01.91.21.20.91.41.61.00.80.91.01.40.92.42.31.72.43.82.72.03.34.24.12.14.05.04.43.15.74.5

Other Assets Current

us-gaap:OtherAssetsCurrent

us-gaap:OtherAssetsCurrent


Other
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312009-12-31
Value154155132839259827969561006157106536451108455058543976155175173119118102171160163154175220208155185202161106149238
Percentage of OtherAssetsCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets0.70.70.60.40.40.30.40.40.40.30.60.30.30.60.30.40.30.70.30.30.40.30.30.51.01.11.10.80.80.71.00.91.01.01.11.41.51.11.41.51.20.81.21.9

Property Plant And Equipment Gross

us-gaap:PropertyPlantAndEquipmentGross

us-gaap:PropertyPlantAndEquipmentGross


Property
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312009-12-31
Value233932319223072228032262222136220512094819806188871803017120163631583815559153641524115154150781494314811146711453014457141751390813602121731173711313155361494414085135601308812404119531149511177107091035010036985410145
Percentage of PropertyPlantAndEquipmentGross100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets99.8100.1100.0100.198.4100.8101.198.2100.399.898.995.696.796.492.491.691.494.393.493.593.694.794.193.290.689.588.985.181.682.987.784.988.987.882.680.786.580.781.681.379.477.078.879.1

us-gaap:PropertyPlantAndEquipmentGross oke:PropertyPlantAndEquipmentRegulatedAndNonRegulated, us-gaap:PropertyPlantAndEquipmentByType

oke:NonRegulatedPropertyPlantAndEquipment, us-gaap:ConstructionInProgress


Property
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-31
Value1265164579736237169112361112881
Percentage of PropertyPlantAndEquipmentGross5.57.54.42.32.54.89.17.26.7
Percentage of Assets5.57.54.42.22.34.58.16.35.6
Percentage of Assets oke:NonRegulatedPropertyPlantAndEquipment us-gaap:ConstructionInProgress0.00.00.00.00.00.00.00.00.0

oke:NonRegulatedPropertyPlantAndEquipment, us-gaap:Containers


Property
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-31
Value798684656604558456478362335
Percentage of PropertyPlantAndEquipmentGross3.53.13.63.93.73.13.52.32.6
Percentage of Assets3.53.13.63.63.53.03.12.02.1
Percentage of Assets oke:NonRegulatedPropertyPlantAndEquipment us-gaap:Containers0.00.00.00.00.00.00.00.00.0

oke:NonRegulatedPropertyPlantAndEquipment, us-gaap:GasGatheringAndProcessingEquipment


Property
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-31
Value508444394171387338313627288022951625
Percentage of PropertyPlantAndEquipmentGross22.020.123.124.925.425.021.214.812.4
Percentage of Assets22.020.422.923.023.723.518.813.010.2
Percentage of Assets oke:NonRegulatedPropertyPlantAndEquipment us-gaap:GasGatheringAndProcessingEquipment0.00.00.00.00.00.00.00.00.0

oke:NonRegulatedPropertyPlantAndEquipment, us-gaap:ManufacturingFacility


Property
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-31
Value647610547504487407364402348
Percentage of PropertyPlantAndEquipmentGross2.82.83.03.23.22.82.72.62.7
Percentage of Assets2.82.83.03.03.02.62.42.32.2
Percentage of Assets oke:NonRegulatedPropertyPlantAndEquipment us-gaap:ManufacturingFacility0.00.00.00.00.00.00.00.00.0

oke:NonRegulatedPropertyPlantAndEquipment, us-gaap:OtherTransportationEquipment


Property
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-31
Value810797782700689416518302311
Percentage of PropertyPlantAndEquipmentGross3.53.64.34.54.62.93.81.92.4
Percentage of Assets3.53.74.34.24.32.73.41.72.0
Percentage of Assets oke:NonRegulatedPropertyPlantAndEquipment us-gaap:OtherTransportationEquipment0.00.00.00.00.00.00.00.00.0

oke:NonRegulatedPropertyPlantAndEquipment, us-gaap:Pipelines


Property
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-31
Value414343163851361333522961244921731638
Percentage of PropertyPlantAndEquipmentGross18.019.621.423.222.220.418.014.012.5
Percentage of Assets18.019.821.121.420.819.216.012.310.3
Percentage of Assets oke:NonRegulatedPropertyPlantAndEquipment us-gaap:Pipelines0.00.00.00.00.00.00.00.00.0

oke:RegulatedPropertyPlantAndEquipment, us-gaap:ConstructionInProgress


Property
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-31
Value24718021002836283194822703
Percentage of PropertyPlantAndEquipmentGross1.18.25.60.50.40.61.45.35.4
Percentage of Assets1.18.35.50.50.40.51.34.64.4
Percentage of Assets oke:RegulatedPropertyPlantAndEquipment us-gaap:ConstructionInProgress0.00.00.00.00.00.00.00.00.0

oke:RegulatedPropertyPlantAndEquipment, us-gaap:Containers


Property
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-31
Value9.189.188.987121376115135136
Percentage of PropertyPlantAndEquipmentGross0.00.00.00.10.10.50.90.91.0
Percentage of Assets0.00.00.00.10.10.50.80.80.9
Percentage of Assets oke:RegulatedPropertyPlantAndEquipment us-gaap:Containers0.00.00.00.00.00.00.00.00.0

oke:RegulatedPropertyPlantAndEquipment, us-gaap:GasTransmissionAndDistributionEquipment


Property
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-31
Value842361264677434043094208382220491490
Percentage of PropertyPlantAndEquipmentGross36.527.825.927.928.629.028.113.211.4
Percentage of Assets36.528.125.725.826.727.225.011.69.4
Percentage of Assets oke:RegulatedPropertyPlantAndEquipment us-gaap:GasTransmissionAndDistributionEquipment0.00.00.00.00.00.00.00.00.0

oke:RegulatedPropertyPlantAndEquipment, us-gaap:GasTransmissionEquipment


Property
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-31
Value156915521475140613451507147818501796
Percentage of PropertyPlantAndEquipmentGross6.87.08.29.08.910.410.911.913.7
Percentage of Assets6.87.18.18.48.39.89.710.511.3
Percentage of Assets oke:RegulatedPropertyPlantAndEquipment us-gaap:GasTransmissionEquipment0.00.00.00.00.00.00.00.00.0

oke:RegulatedPropertyPlantAndEquipment, us-gaap:ManufacturingFacility


Property
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-31
Value72666157549463324309
Percentage of PropertyPlantAndEquipmentGross0.30.30.30.40.40.70.52.12.4
Percentage of Assets0.30.30.30.30.30.60.41.81.9
Percentage of Assets oke:RegulatedPropertyPlantAndEquipment us-gaap:ManufacturingFacility0.00.00.00.00.00.00.00.00.0

Accumulated Depreciation Depletion And Amortization Property Plant And Equipment

us-gaap:AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment

us-gaap:AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment


Accumulated
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312009-12-31
Value42114067391837733641350637023585347033693264315930592960286127852694260025072416232622342156217820992017194019311866180232383173310530392974291428552794273326902637259725412352
Percentage of AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets18.017.517.016.615.816.017.016.817.617.817.917.618.118.017.016.616.216.215.515.114.714.414.014.013.413.012.713.513.013.218.318.019.619.718.819.020.719.620.020.420.219.920.318.3

us-gaap:AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment oke:LeaseDescription

oke:LeaseAssetsandLiabilitiesIncludedintheConsolidatedBalanceSheet


Accumulated
Period End2020-12-312019-12-312019-09-302019-06-302019-03-31
Value2.4511.321.0370.7540.471
Percentage of AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment0.10.00.00.00.0
Percentage of Assets0.00.00.00.00.0
Percentage of Assets oke:LeaseAssetsandLiabilitiesIncludedintheConsolidatedBalanceSheet0.00.00.00.00.0

us-gaap:AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment oke:PropertyPlantAndEquipmentRegulatedAndNonRegulated

oke:NonRegulatedPropertyPlantAndEquipment


Accumulated
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-31
Value25142471216818881641132512211112954
Percentage of AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment64.266.866.466.065.561.463.034.332.1
Percentage of Assets10.911.311.911.210.28.68.06.36.0
Percentage of Assets oke:NonRegulatedPropertyPlantAndEquipment0.00.00.00.00.00.00.00.00.0

oke:RegulatedPropertyPlantAndEquipment


Accumulated
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-31
Value14031231109597386583171821262020
Percentage of AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment35.833.233.634.034.538.637.065.767.9
Percentage of Assets6.15.66.05.85.45.44.712.012.7
Percentage of Assets oke:RegulatedPropertyPlantAndEquipment0.00.00.00.00.00.00.00.00.0

Property Plant And Equipment Net

us-gaap:PropertyPlantAndEquipmentNet

us-gaap:PropertyPlantAndEquipmentNet


Property
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312009-12-31
Value19181191251915419029189811862918348173621633615518147661396013303128781269812578125461255312571125261248412437123731227812075118911166210242987095101229711770109791052110114949090988701844480197712743873137793
Percentage of PropertyPlantAndEquipmentNet100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets81.882.583.083.582.684.884.181.482.782.081.077.978.778.475.475.075.378.177.978.478.980.280.179.277.276.676.271.668.669.769.466.869.368.163.861.865.861.161.760.959.257.058.560.8

Goodwill

us-gaap:Goodwill

us-gaap:Goodwill


Goodwill
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-312010-12-31
Value527527527527680681681525525525683591601602
Percentage of Goodwill100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets2.32.32.32.43.13.74.03.33.43.43.93.74.44.8

us-gaap:Goodwill oke:ReportableSegmentByName

oke:NaturalGasLiquids


Goodwilloke:
Period End2020-09-302020-06-302020-03-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-31
Value371371371371371371268268268268
Percentage of Goodwill70.470.470.454.554.554.551.151.151.139.3
Percentage of Assets1.61.61.71.72.02.21.71.71.81.5
Percentage of Assets oke:NaturalGasLiquids0.00.00.00.00.00.00.00.00.00.0

oke:NaturalGasPipelines


Goodwilloke:
Period End2020-09-302020-06-302020-03-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-31
Value156156156156156156134134134134
Percentage of Goodwill29.629.629.623.023.023.025.625.625.619.7
Percentage of Assets0.70.70.70.70.90.90.80.90.90.8
Percentage of Assets oke:NaturalGasPipelines0.00.00.00.00.00.00.00.00.00.0

Intangible Assets Net Excluding Goodwill

us-gaap:IntangibleAssetsNetExcludingGoodwill

us-gaap:IntangibleAssetsNetExcludingGoodwill


Intangible
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-31
Value246276286312479491489
Percentage of IntangibleAssetsNetExcludingGoodwill100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets1.11.31.61.93.03.23.2

Intangible Assets Net Including Goodwill

us-gaap:IntangibleAssetsNetIncludingGoodwill

us-gaap:IntangibleAssetsNetIncludingGoodwill


Intangible
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302012-12-31
Value76877177377677878195796096396496797098799099399699910021005100810111014101710201023101110141017101810211182990992996
Percentage of IntangibleAssetsNetIncludingGoodwill100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets3.33.33.43.43.43.64.44.54.95.15.35.45.86.05.95.96.06.26.26.36.46.56.66.66.56.56.67.17.17.56.75.66.36.3

Operating Lease Right Of Use Asset

us-gaap:OperatingLeaseRightOfUseAsset oke:LeaseDescription

us-gaap:OperatingLeaseRightOfUseAsset

oke:CertainOperatingLeasesEnteredIntoDuringThePeriod


Operating
Period End2020-09-302020-06-302020-03-31
Value161617
Percentage of OperatingLeaseRightOfUseAsset100.0100.0100.0
Percentage of Assets0.10.10.1
Percentage of Assets oke:CertainOperatingLeasesEnteredIntoDuringThePeriod0.00.00.0

oke:LeaseAssetsandLiabilitiesIncludedintheConsolidatedBalanceSheet


Operating
Period End2020-12-312019-12-312019-09-302019-06-302019-03-31
Value10015161716
Percentage of OperatingLeaseRightOfUseAsset0.00.00.00.00.0
Percentage of Assets0.40.10.10.10.1
Percentage of Assets oke:LeaseAssetsandLiabilitiesIncludedintheConsolidatedBalanceSheet0.00.00.00.00.0

oke:LeaseremainingbalancerelatedtoleaseenteredinDecember2019MemberMember


Operating
Period End2020-12-312020-09-302020-06-302020-03-31
Value69707274
Percentage of OperatingLeaseRightOfUseAsset0.0436.4435.5430.2
Percentage of Assets0.30.30.30.3
Percentage of Assets oke:LeaseremainingbalancerelatedtoleaseenteredinDecember2019MemberMember0.00.00.00.0

Other Assets Noncurrent

us-gaap:OtherAssetsNoncurrent

us-gaap:OtherAssetsNoncurrent


Other
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312009-12-31
Value451478475463262259173174169158130191170159180182170176162121118112112115129167167184193202626765772760758701701720695575588595594626
Percentage of OtherAssetsNoncurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets1.92.12.12.01.11.20.80.80.90.80.71.11.01.01.11.11.01.11.00.80.80.70.70.70.81.11.11.31.31.53.54.34.94.94.84.65.15.15.14.44.54.64.84.9

Accounts Payable Current

us-gaap:AccountsPayableCurrent

us-gaap:AccountsPayableCurrent


Accounts
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312009-12-31
Value105292971962475574212091129907102711181339102777311409226967038747116975226156206947218911221127111551503138212141205133311539111110134112411194113112151240
Percentage of AccountsPayableCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets4.54.03.12.73.33.45.55.34.65.46.17.56.14.76.85.54.24.45.44.54.43.44.04.04.44.65.88.58.88.58.57.97.77.88.47.56.67.89.89.49.28.79.79.7

Contract With Customer Liability Current

us-gaap:ContractWithCustomerLiabilityCurrent

us-gaap:ContractWithCustomerLiabilityCurrent


Contract
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312018-01-01
Value351523273111222530101523276.019
Percentage of ContractWithCustomerLiabilityCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets0.20.10.10.10.10.10.10.10.20.10.10.10.20.00.0

Liabilities Current

us-gaap:LiabilitiesCurrent

us-gaap:LiabilitiesCurrent


Liabilities
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312009-12-31
Value23942047134410941273109120201567173716892108245025722050266727412860273128362341218817641638196026062548239217811851189126962621264823372812243922562600324629762840230131513338
Percentage of LiabilitiesCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets10.28.85.84.85.55.09.37.38.88.911.613.715.212.515.816.417.217.017.614.713.811.410.612.616.716.415.612.512.913.915.214.916.715.117.715.916.318.223.722.621.817.725.226.0

Long Term Debt Current

us-gaap:LongTermDebtCurrent

us-gaap:LongTermDebtCurrent


Long
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312009-12-31
Value5365437.657.657.657.657.657.653073075075079329324324324944104104604604601106606606601010101010101010101112364364365368418643268
Percentage of LongTermDebtCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets2.32.30.00.00.00.00.00.01.61.62.82.85.55.72.62.63.02.62.52.92.93.00.74.34.24.30.10.10.10.10.10.10.10.10.10.10.12.62.72.82.83.25.12.1

Operating Lease Liability Current

us-gaap:OperatingLeaseLiabilityCurrent

us-gaap:OperatingLeaseLiabilityCurrent


Operating
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-31
Value1413131313131.883
Percentage of OperatingLeaseLiabilityCurrent100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets0.10.10.10.10.10.10.0

us-gaap:OperatingLeaseLiabilityCurrent oke:LeaseDescription

oke:LeaseAssetsandLiabilitiesIncludedintheConsolidatedBalanceSheet


Operating
Period End2020-12-312019-12-31
Value131.883
Percentage of OperatingLeaseLiabilityCurrent100.0100.0
Percentage of Assets0.10.0
Percentage of Assets oke:LeaseAssetsandLiabilitiesIncludedintheConsolidatedBalanceSheet0.00.0

Other Liabilities Current

us-gaap:OtherLiabilitiesCurrent

us-gaap:OtherLiabilitiesCurrent


Other
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312009-12-31
Value20814583789389285123252119211208184122179166167122166214202126132157256208285120190127401433388357369358396410345352392450424488
Percentage of OtherLiabilitiesCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets0.90.60.40.30.40.41.30.61.30.61.21.21.10.71.11.01.00.81.01.31.30.80.91.01.61.31.90.81.30.92.32.52.52.32.32.32.92.92.52.73.03.53.43.8

Taxes Payable Current

us-gaap:TaxesPayableCurrent

us-gaap:TaxesPayableCurrent


Taxes
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302018-12-31
Value9465891037761757961
Percentage of TaxesPayableCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets0.40.30.40.50.30.30.30.40.3

Long Term Debt

us-gaap:LongTermDebt

us-gaap:LongTermDebt


Long
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302012-12-31
Value14200142001420014300143001420012500125001110010300940088008000800085008500830083008300880088008800840084008000800072007200720072007800780065006500
Percentage of LongTermDebt100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets60.661.361.562.862.264.657.358.656.254.451.649.147.348.750.550.749.851.751.455.155.656.854.454.251.151.547.050.350.152.744.044.341.041.0

Long Term Debt Noncurrent

us-gaap:LongTermDebtNoncurrent

us-gaap:LongTermDebtNoncurrent


Long
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312009-12-31
Value136371363814228142491427614146124791247910754100048873832570917091809180927835791979198320832083208323777372917339719271947196719977547757651165136515651752245225452945324622497636864334
Percentage of LongTermDebtNoncurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets58.258.861.762.562.164.457.258.554.452.848.746.541.943.248.048.347.049.349.152.152.653.753.950.146.647.347.050.350.052.743.844.041.142.241.142.437.836.733.134.435.538.229.533.8

Deferred Tax Liabilities Noncurrent

us-gaap:DeferredTaxLiabilitiesNoncurrent

us-gaap:DeferredTaxLiabilitiesNoncurrent


Deferred
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312009-12-31
Value8818146695824754425364183472702191325453527673161216231573151814841436143714511430139513031253114419381776171616781592153914571408144613861288122311711037
Percentage of DeferredTaxLiabilitiesNoncurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets3.83.52.92.62.12.02.52.01.81.41.20.70.30.30.30.50.410.010.19.89.69.69.39.39.39.29.19.18.78.410.910.110.810.910.010.010.69.910.610.59.99.49.48.1

Pension And Other Postretirement Defined Benefit Plans Liabilities Noncurrent

us-gaap:PensionAndOtherPostretirementDefinedBenefitPlansLiabilitiesNoncurrent us-gaap:RetirementPlanType

us-gaap:PensionAndOtherPostretirementDefinedBenefitPlansLiabilitiesNoncurrent

us-gaap:OtherPostretirementBenefitPlansDefinedBenefit


Pension
Period End2020-12-312019-12-312018-12-312017-12-312016-12-31
Value3313162325
Percentage of PensionAndOtherPostretirementDefinedBenefitPlansLiabilitiesNoncurrent100.0100.0100.0100.0100.0
Percentage of Assets0.10.10.10.10.2
Percentage of Assets us-gaap:OtherPostretirementBenefitPlansDefinedBenefit0.00.00.00.00.0

us-gaap:PensionPlansDefinedBenefit


Pension
Period End2020-12-312019-12-312018-12-312017-12-312016-12-31
Value199183171171162
Percentage of PensionAndOtherPostretirementDefinedBenefitPlansLiabilitiesNoncurrent592.41384.61071.0718.6642.4
Percentage of Assets0.90.80.91.01.0
Percentage of Assets us-gaap:PensionPlansDefinedBenefit0.00.00.00.00.0

Other Liabilities Noncurrent

us-gaap:OtherLiabilitiesNoncurrent

us-gaap:OtherLiabilitiesNoncurrent


Other
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312009-12-31
Value531496706618632631525626538501450350357366348339337334321296293273264278276290281229237229472763791712701692672638674592584575566662
Percentage of OtherLiabilitiesNoncurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets2.32.13.12.72.82.92.42.92.72.72.52.02.12.22.12.02.02.12.01.91.91.81.71.81.81.91.81.61.71.72.74.35.04.64.44.54.94.54.94.54.54.44.55.2

Operating Lease Liability Noncurrent

us-gaap:OperatingLeaseLiabilityNoncurrent

us-gaap:OperatingLeaseLiabilityNoncurrent


Operating
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-31
Value81858790939613
Percentage of OperatingLeaseLiabilityNoncurrent100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets0.30.40.40.40.40.40.1

us-gaap:OperatingLeaseLiabilityNoncurrent oke:LeaseDescription

oke:LeaseAssetsandLiabilitiesIncludedintheConsolidatedBalanceSheet


Operating
Period End2020-12-312019-12-31
Value8713
Percentage of OperatingLeaseLiabilityNoncurrent100.0100.0
Percentage of Assets0.40.1
Percentage of Assets oke:LeaseAssetsandLiabilitiesIncludedintheConsolidatedBalanceSheet0.00.0

Lessee Operating Lease Liability Payments Due Year Two

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearTwo oke:LeaseDescription

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearTwo

oke:MaturityofOperatingLeaseLiabilities


Lessee
Period End2020-12-312020-09-30
Value1516
Percentage of LesseeOperatingLeaseLiabilityPaymentsDueYearTwo100.0100.0
Percentage of Assets0.10.1
Percentage of Assets oke:MaturityofOperatingLeaseLiabilities0.00.0

Lessee Operating Lease Liability Payments Due Year Three

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearThree oke:LeaseDescription

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearThree

oke:MaturityofOperatingLeaseLiabilities


Lessee
Period End2020-12-312020-09-30
Value1315
Percentage of LesseeOperatingLeaseLiabilityPaymentsDueYearThree100.0100.0
Percentage of Assets0.10.1
Percentage of Assets oke:MaturityofOperatingLeaseLiabilities0.00.0

Lessee Operating Lease Liability Payments Due Year Four

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearFour oke:LeaseDescription

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearFour

oke:MaturityofOperatingLeaseLiabilities


Lessee
Period End2020-12-312020-09-30
Value1213
Percentage of LesseeOperatingLeaseLiabilityPaymentsDueYearFour100.0100.0
Percentage of Assets0.10.1
Percentage of Assets oke:MaturityofOperatingLeaseLiabilities0.00.0

Lessee Operating Lease Liability Payments Due Year Five

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearFive oke:LeaseDescription

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearFive

oke:MaturityofOperatingLeaseLiabilities


Lessee
Period End2020-12-312020-09-30
Value1112
Percentage of LesseeOperatingLeaseLiabilityPaymentsDueYearFive100.0100.0
Percentage of Assets0.00.1
Percentage of Assets oke:MaturityofOperatingLeaseLiabilities0.00.0

Lessee Operating Lease Liability Payments Due After Year Five

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueAfterYearFive oke:LeaseDescription

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueAfterYearFive

oke:MaturityofOperatingLeaseLiabilities


Lessee
Period End2020-12-312020-09-30
Value4758
Percentage of LesseeOperatingLeaseLiabilityPaymentsDueAfterYearFive100.0100.0
Percentage of Assets0.20.3
Percentage of Assets oke:MaturityofOperatingLeaseLiabilities0.00.0

Operating Lease Liability

us-gaap:OperatingLeaseLiability oke:LeaseDescription

us-gaap:OperatingLeaseLiability

oke:CertainOperatingLeasesEnteredIntoDuringThePeriod


Operating
Period End2020-09-302020-06-302020-03-31
Value161617
Percentage of OperatingLeaseLiability100.0100.0100.0
Percentage of Assets0.10.10.1
Percentage of Assets oke:CertainOperatingLeasesEnteredIntoDuringThePeriod0.00.00.0

oke:LeaseremainingbalancerelatedtoleaseenteredinDecember2019MemberMember


Operating
Period End2020-12-312020-09-302020-06-302020-03-31
Value69717274
Percentage of OperatingLeaseLiability0.0440.7438.6431.4
Percentage of Assets0.30.30.30.3
Percentage of Assets oke:LeaseremainingbalancerelatedtoleaseenteredinDecember2019MemberMember0.00.00.00.0

oke:MaturityofOperatingLeaseLiabilities


Operating
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-31
Value10110410710915161716
Percentage of OperatingLeaseLiability0.0645.1646.4639.00.00.00.00.0
Percentage of Assets0.40.50.50.50.10.10.10.1
Percentage of Assets oke:MaturityofOperatingLeaseLiabilities0.00.00.00.00.00.00.00.0

Lessee Operating Lease Liability Payments Due

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDue oke:LeaseDescription

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDue

oke:MaturityofOperatingLeaseLiabilities


Lessee
Period End2020-12-312020-09-30
Value116120
Percentage of LesseeOperatingLeaseLiabilityPaymentsDue100.0100.0
Percentage of Assets0.50.5
Percentage of Assets oke:MaturityofOperatingLeaseLiabilities0.00.0

Lessee Operating Lease Liability Undiscounted Excess Amount

us-gaap:LesseeOperatingLeaseLiabilityUndiscountedExcessAmount oke:LeaseDescription

us-gaap:LesseeOperatingLeaseLiabilityUndiscountedExcessAmount

oke:MaturityofOperatingLeaseLiabilities


Lessee
Period End2020-12-312020-09-30
Value1415
Percentage of LesseeOperatingLeaseLiabilityUndiscountedExcessAmount100.0100.0
Percentage of Assets0.10.1
Percentage of Assets oke:MaturityofOperatingLeaseLiabilities0.00.0

Stockholders Equity

us-gaap:StockholdersEquity

us-gaap:StockholdersEquity


Stockholders
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312009-12-31
Value5910609660426146624055606225621863486442657966526664670155275359540723818821423728633541451753059262365658423372189208521342129206520892256223821852217249924482207
Percentage of StockholdersEquity100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets25.226.326.227.027.125.328.529.132.134.036.137.139.440.832.832.032.41.51.21.31.51.92.22.73.33.43.94.44.64.313.212.413.213.813.413.415.115.816.316.617.019.219.617.2

us-gaap:StockholdersEquity us-gaap:StatementEquityComponents

us-gaap:AccumulatedOtherComprehensiveIncome


Stockholders
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-30
Value-601.443-465.596-551.449-530.618-524.903-499.386-374.0-421.104-336.396-269.524-188.239-158.138-178.589
Percentage of StockholdersEquity-10.2-7.6-9.1-8.6-8.4-9.0-6.0-6.8-5.3-4.2-2.9-2.4-2.7
Percentage of Assets-2.6-2.0-2.4-2.3-2.3-2.3-1.7-2.0-1.7-1.4-1.0-0.9-1.1
Percentage of Assets us-gaap:AccumulatedOtherComprehensiveIncome0.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:AdditionalPaidInCapital


Stockholders
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-30
Value7247730573537448754969897403744874957527761576627699
Percentage of StockholdersEquity122.6119.8121.7121.2121.0125.7118.9119.8118.1116.9115.7115.2115.5
Percentage of Assets30.931.531.932.732.831.833.934.937.939.841.842.845.5
Percentage of Assets us-gaap:AdditionalPaidInCapital0.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:CommonStock


Stockholders
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-30
Value4.7494.7494.7494.7494.7494.454.454.454.454.454.454.454.45
Percentage of StockholdersEquity0.10.10.10.10.10.10.10.10.10.10.10.10.1
Percentage of Assets0.00.00.00.00.00.00.00.00.00.00.00.00.0
Percentage of Assets us-gaap:CommonStock0.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:TreasuryStock


Stockholders
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-30
Value-740.254-747.462-764.298-776.503-781.489-792.019-808.394-812.539-815.376-820.767-851.806-856.227-860.935
Percentage of StockholdersEquity-12.5-12.3-12.6-12.6-12.5-14.2-13.0-13.1-12.8-12.7-12.9-12.9-12.9
Percentage of Assets-3.2-3.2-3.3-3.4-3.4-3.6-3.7-3.8-4.1-4.3-4.7-4.8-5.1
Percentage of Assets us-gaap:TreasuryStock0.00.00.00.00.00.00.00.00.00.00.00.00.0

Stockholders Equity Including Portion Attributable To Noncontrolling Interest

us-gaap:StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest

us-gaap:StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest


Stockholders
Period End2020-12-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312008-12-312007-12-31
Value60426225621863486442657966526838686956855516556534693428344034923645376640373999389340053759379331274845469041744204423241754205437937993682369739573920389538703879344531672771
Percentage of StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets26.228.529.132.134.036.137.140.441.833.732.933.421.621.221.522.123.524.426.025.625.126.226.326.422.927.426.626.327.226.727.230.430.727.728.028.430.331.432.731.90.026.90.00.0

us-gaap:StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest us-gaap:StatementEquityComponents

us-gaap:AccumulatedOtherComprehensiveIncome


Stockholders
Period End2020-12-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312009-12-312008-12-312007-12-31
Value-551.449-374.0-421.104-336.396-269.524-188.239-158.138-178.589-174.692-188.53-181.771-176.085-139.062-154.35-154.351-159.246-134.614-127.242-136.112-135.334-139.892-136.353-107.656-113.127-109.913-121.987-219.492-211.97-223.153-216.798-240.476-205.64-178.845-206.121-174.573-131.266-135.137-108.802-118.613-70.616-7.069
Percentage of StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest-9.1-6.0-6.8-5.3-4.2-2.9-2.4-2.6-2.5-3.3-3.3-3.2-4.0-4.5-4.5-4.6-3.7-3.4-3.4-3.4-3.6-3.4-2.9-3.0-3.5-2.5-4.7-5.1-5.3-5.1-5.8-4.9-4.1-5.4-4.7-3.5-3.4-2.8-3.4-2.2-0.3
Percentage of Assets-2.4-1.7-2.0-1.7-1.4-1.0-0.9-1.1-1.1-1.1-1.1-1.1-0.9-1.0-1.0-1.0-0.9-0.8-0.9-0.9-0.9-0.9-0.8-0.8-0.8-0.7-1.2-1.3-1.4-1.4-1.6-1.5-1.3-1.5-1.3-1.0-1.0-0.9-0.90.00.0
Percentage of Assets us-gaap:AccumulatedOtherComprehensiveIncome0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:AdditionalPaidInCapital


Stockholders
Period End2020-12-312019-12-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312009-12-312008-12-312007-12-31
Value73537403761576627699773565886418646312321234126412941327137814771564153715411515150313771433140412781267132413371326131714181404139613841392132213011273
Percentage of StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest121.7118.9115.7115.2112.6112.6115.9116.3116.135.536.036.737.136.436.636.639.139.538.540.339.644.029.629.930.630.231.332.031.530.137.338.137.835.035.538.441.146.0
Percentage of Assets31.933.941.842.845.547.139.138.338.87.77.67.98.28.68.99.510.09.910.110.610.510.18.18.08.18.28.48.79.69.210.410.710.710.611.110.30.00.0
Percentage of Assets us-gaap:AdditionalPaidInCapital0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:CommonStock


Stockholders
Period End2020-12-312019-12-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312009-12-312008-12-312007-12-31
Value4.7494.454.454.454.454.454.2324.1594.1472.4582.4582.4582.4582.4582.4582.4582.4582.4582.4582.4582.4582.4582.4582.4582.4582.4582.4582.4582.4581.2291.2291.2291.2291.2281.2281.2241.2161.211
Percentage of StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest0.10.10.10.10.10.10.10.10.10.10.10.10.10.10.10.10.10.10.10.10.10.10.10.10.10.10.10.10.10.00.00.00.00.00.00.00.00.0
Percentage of Assets0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0
Percentage of Assets us-gaap:CommonStock0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:TreasuryStock


Stockholders
Period End2020-12-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312009-12-312008-12-312007-12-31
Value-764.298-808.394-812.539-815.376-820.767-851.806-856.227-860.935-863.485-876.713-880.931-883.445-887.97-893.677-897.852-900.366-908.507-917.862-929.505-937.051-942.55-953.701-956.977-961.911-965.31-997.035-1005.829-1007.834-1010.45-1039.773-1048.329-1050.942-903.585-935.323-947.839-949.632-652.573-663.274-683.467-696.616-710.126
Percentage of StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest-12.6-13.0-13.1-12.8-12.7-12.9-12.9-12.6-12.6-15.4-16.0-15.9-25.6-26.1-26.1-25.8-24.9-24.4-23.0-23.4-24.2-23.8-25.5-25.4-30.9-20.6-21.4-24.1-24.0-24.6-25.1-25.0-20.6-24.6-25.7-25.7-16.5-16.9-19.8-22.0-25.6
Percentage of Assets-3.3-3.7-3.8-4.1-4.3-4.7-4.8-5.1-5.3-5.2-5.3-5.3-5.5-5.5-5.6-5.7-5.9-5.9-6.0-6.0-6.1-6.2-6.7-6.7-7.1-5.6-5.7-6.4-6.5-6.6-6.8-7.6-6.3-6.8-7.2-7.3-5.0-5.3-5.30.00.0
Percentage of Assets us-gaap:TreasuryStock0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

Common Stock Value

us-gaap:CommonStockValue

us-gaap:CommonStockValue


Common
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312009-12-31
Value4749000.04749000.04749000.04749000.04749000.04450000.04450000.04450000.04450000.04450000.04450000.04450000.04450000.04450000.04232000.04159000.04147000.02458000.02458000.02458000.02458000.02458000.02458000.02458000.02458000.02458000.02458000.02458000.02458000.02458000.02458000.02458000.02458000.02458000.02458000.02458000.02458000.01229000.01229000.01229000.01229000.01228000.01228000.01224000.0
Percentage of CommonStockValue100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

Additional Paid In Capital

us-gaap:AdditionalPaidInCapital

us-gaap:AdditionalPaidInCapital


Additional
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312009-12-31
Value72477305735374487549698974037448749575277615766276997735658864186463123212341264129413271378147715641537154115151503137714331404127812671324133713261317141814041396138413921322
Percentage of AdditionalPaidInCapital100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets30.931.531.932.732.831.833.934.937.939.841.842.845.547.139.138.338.87.77.67.98.28.68.99.510.09.910.110.610.510.18.18.08.18.28.48.79.69.210.410.710.710.611.110.3

Accumulated Other Comprehensive Income Loss Net Of Tax

us-gaap:AccumulatedOtherComprehensiveIncomeLossNetOfTax

us-gaap:AccumulatedOtherComprehensiveIncomeLossNetOfTax


Accumulated
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312009-12-31
Value-601440000.0-465600000.0-551450000.0-530620000.0-524900000.0-499390000.0-374000000.0-421100000.0-336400000.0-269520000.0-188240000.0-158140000.0-178590000.0-174690000.0-188530000.0-181770000.0-176080000.0-139060000.0-154350000.0-154350000.0-159250000.0-134610000.0-127240000.0-136110000.0-135330000.0-139890000.0-136350000.0-107660000.0-113130000.0-109910000.0-121990000.0-219490000.0-211970000.0-223150000.0-216800000.0-240480000.0-205640000.0-178840000.0-206120000.0-174570000.0-131270000.0-135140000.0-108800000.0-118610000.0
Percentage of AccumulatedOtherComprehensiveIncomeLossNetOfTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets-2.6-2.0-2.4-2.3-2.3-2.3-1.7-2.0-1.7-1.4-1.0-0.9-1.1-1.1-1.1-1.1-1.1-0.9-1.0-1.0-1.0-0.9-0.8-0.9-0.9-0.9-0.9-0.8-0.8-0.8-0.7-1.2-1.3-1.4-1.4-1.6-1.5-1.3-1.5-1.3-1.0-1.0-0.9-0.9

Treasury Stock Value

us-gaap:TreasuryStockValue

us-gaap:TreasuryStockValue


Treasury
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-03-312010-12-312009-12-31
Value740747764776781792808812815820851856860863876880883887893897900908917929937942953956961965997100510071010103910481050903935947652663683
Percentage of TreasuryStockValue100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets3.23.23.33.43.43.63.73.84.14.34.74.85.15.35.25.35.35.55.55.65.75.95.96.06.06.16.26.76.77.15.65.76.46.56.66.87.66.36.87.25.05.35.3

Net Cash Provided By Used In Operating Activities

us-gaap:NetCashProvidedByUsedInOperatingActivities

us-gaap:NetCashProvidedByUsedInOperatingActivities


Net
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value54453379536631342261935861435367051350749537929337326942939030222931136129439415334454902732333164712281102264263301542276477416832558
Percentage of NetCashProvidedByUsedInOperatingActivities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Revenues16.116.731.016.918.919.823.315.925.012.721.415.117.116.010.010.113.79.816.216.614.212.916.219.013.82.214.610.71.515.56.66.59.513.36.23.69.012.58.14.36.516.82.35.71.214.2

Net Cash Provided By Used In Investing Activities

us-gaap:NetCashProvidedByUsedInInvestingActivities

us-gaap:NetCashProvidedByUsedInInvestingActivities


Net
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value-153.874-170.691-288.658-426.985-590.094-964.792-1120.884-1015.813-767.232-864.829-630.068-883.419-345.749-255.652-173.036-210.866-74.268-109.463-130.857-186.109-128.532-169.947-248.538-286.409-321.997-333.775-1374.087-371.64-381.162-439.334-761.34-837.091-548.793-494.807-615.615-460.133-424.052-314.399-474.739-387.998-319.404-189.485-213.804249-103.509-66.376
Percentage of NetCashProvidedByUsedInInvestingActivities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Revenues-4.5-5.3-11.2-19.6-35.5-45.2-42.1-44.9-31.2-31.1-20.1-26.0-11.7-8.2-4.6-7.3-2.7-4.0-4.9-7.9-6.0-9.6-12.9-15.1-15.1-18.5-48.3-11.9-12.4-13.9-18.4-23.4-16.4-14.0-16.8-15.2-16.8-9.2-11.7-10.8-9.1-4.9-6.58.5-3.7-1.7

Net Cash Provided By Used In Financing Activities

us-gaap:NetCashProvidedByUsedInFinancingActivities

us-gaap:NetCashProvidedByUsedInFinancingActivities


Net
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value-418.828-484.709-429.915-438.3286901052-151.4011056398527-112.69439-164.079-259.388-180.863-402.934-277.97-97.694-287.371-147.801-129.678-19.942-4.126-262.13613360980-169.6474849.865-142.0921349121-416.362-7.6761213-468.74559470-95.188-300.927380120-471.0056.917-354.307
Percentage of NetCashProvidedByUsedInFinancingActivities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Revenues-12.4-15.2-16.7-20.241.649.3-5.746.716.219.0-3.612.9-5.5-8.4-4.8-13.9-10.2-3.6-10.8-6.3-6.1-1.1-0.2-13.80.720.034.5-5.415.80.3-3.437.83.6-11.8-0.240.1-18.517.41.7-2.6-8.69.83.7-16.00.2-9.0

Cash And Cash Equivalents Period Increase Decrease

us-gaap:CashAndCashEquivalentsPeriodIncreaseDecrease

us-gaap:CashAndCashEquivalentsPeriodIncreaseDecrease


Cash
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value-122.08377-498.603414510-652.35139924515-72.48969-2.179-19.71925-320.69521611156433959-187.388-13.4476621-207.05514860-630.211745-110.266-439.671-395.207863-666.272706-73.595-329.166-392.513839-19.449-52.768-64.182138
Percentage of CashAndCashEquivalentsPeriodIncreaseDecrease100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Revenues-3.83.0-22.924.923.9-24.517.710.00.6-2.32.0-0.1-0.60.7-11.00.82.30.42.42.12.23.1-9.9-0.63.70.7-6.64.91.9-15.220.9-3.3-12.4-10.828.5-26.320.7-1.8-9.2-11.221.7-0.6-1.8-2.33.5

Deferred Income Tax Expense Benefit

us-gaap:DeferredIncomeTaxExpenseBenefit

us-gaap:DeferredIncomeTaxExpenseBenefit


Deferred
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value1071199310642-55.949103969775961028674258955592565247522319
Percentage of DeferredIncomeTaxExpenseBenefit100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Depreciation Depletion And Amortization

us-gaap:DepreciationDepletionAndAmortization

us-gaap:DepreciationDepletionAndAmortization


Depreciation
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value15615715215314013212512111411411010710610410310210099999899949388868580747267108949190868184837775787976777577
Percentage of DepreciationDepletionAndAmortization100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DepreciationDepletionAndAmortization us-gaap:StatementBusinessSegments

oke:NaturalGasGatheringAndProcessing


Depreciation
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-31
Value67676666555857555352504948474746464445444641403735353431292827272523
Percentage of DepreciationDepletionAndAmortization42.942.743.543.439.544.445.645.946.646.146.145.845.345.845.445.845.645.245.645.746.844.343.942.241.341.642.542.040.842.825.529.027.326.5

oke:NaturalGasLiquids


Depreciation
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-31
Value74747371695752504646454342424241414141404040403939393431312724222219
Percentage of DepreciationDepletionAndAmortization47.347.448.146.749.243.742.041.540.340.640.740.740.340.741.341.041.141.441.441.441.043.143.544.545.345.742.542.443.140.222.424.424.321.9

oke:NaturalGasPipelines


Depreciation
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-31
Value14141114141414141414131314131312121212121111101010101010101010101011
Percentage of DepreciationDepletionAndAmortization9.29.27.79.310.611.211.611.812.312.412.512.713.612.712.612.512.512.612.212.211.511.811.812.412.412.513.314.615.116.010.011.511.812.2

oke:TotalSegments


Depreciation
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-31
Value1551561511521391311251201141131091061051031031011009898979893
Percentage of DepreciationDepletionAndAmortization99.499.399.399.399.399.399.399.399.299.299.299.299.299.299.399.399.299.299.299.299.399.2

us-gaap:IntersegmentElimination


Depreciation
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-31
Value1.0131.071.011.0091.0070.9870.9150.90.8990.920.8670.8470.8350.7930.7640.7620.7910.7930.7860.7480.740.7420.7460.7820.7880.1081.4020.6870.680.6790.6690.6690.6560.6050.592-0.361.4960.504
Percentage of DepreciationDepletionAndAmortization0.60.70.70.70.70.70.70.70.80.80.80.80.80.80.70.70.80.80.80.80.70.80.80.90.90.11.70.90.91.00.60.70.70.70.7-0.41.80.6

Increase Decrease In Accounts Payable

us-gaap:IncreaseDecreaseInAccountsPayable

us-gaap:IncreaseDecreaseInAccountsPayable


Increase
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-31
Value11225111842109-350.70199105-205.588-62.469-278.29524078-361.008179216-11.491-122.84314934168-64.088-13.601-55.423-10.221-125.898-306.807-107.76-31.243278214639-103.69125247-227.332-176.674103
Percentage of IncreaseDecreaseInAccountsPayable100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Increase Decrease In Inventories

us-gaap:IncreaseDecreaseInInventories

us-gaap:IncreaseDecreaseInInventories


Increase
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value85141-72.7679870-173.8852198-58.273-53.444-129.626140100-149.825281146.79453-77.735-28.1778927-14.224-7.829-68.55484-204.2113.229-23.72263247-229.217-132.523214-127.70582262-251.227-92.82-107.785-166.502301-5.849-160.491-175.687177
Percentage of IncreaseDecreaseInInventories100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Increase Decrease In Other Operating Capital Net

us-gaap:IncreaseDecreaseInOtherOperatingCapitalNet

us-gaap:IncreaseDecreaseInOtherOperatingCapitalNet


Increase
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value-3.139-56.9664117927-129.93-45.73-3.26-51.166114-27.069-4.341-25.26752-5.8582.404-34.58553-17.328-24.999-21.16327257.21-28.59752-20.34934-30.04-1.011-104.3789.09979-22.425-22.07241424.4084115-113.0396765-8.933-184.013158
Percentage of IncreaseDecreaseInOtherOperatingCapitalNet100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Net Cash Provided By Used In Operating Activities

us-gaap:NetCashProvidedByUsedInOperatingActivities

us-gaap:NetCashProvidedByUsedInOperatingActivities


Net
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value54453379536631342261935861435367051350749537929337326942939030222931136129439415334454902732333164712281102264263301542276477416832558
Percentage of NetCashProvidedByUsedInOperatingActivities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Revenues16.116.731.016.918.919.823.315.925.012.721.415.117.116.010.010.113.79.816.216.614.212.916.219.013.82.214.610.71.515.56.66.59.513.36.23.69.012.58.14.36.516.82.35.71.214.2

Profit Loss

us-gaap:ProfitLoss

us-gaap:ProfitLoss


Profit
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value342386308312134-141.85732030931133729231328226664166175186194194179174-28.216160150952011141402061841477916519516414923326416013419914712086186
Percentage of ProfitLoss100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Revenues10.112.112.014.48.1-6.612.013.712.712.19.39.29.58.61.75.76.56.87.38.28.49.9-1.58.57.15.37.13.74.66.54.44.12.44.75.45.45.96.86.54.53.85.24.54.13.14.8

us-gaap:ProfitLoss us-gaap:StatementEquityComponents

us-gaap:RetainedEarnings


Profit
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-31
Value342386312134-141.85730931133729231328126463165718790928583258276609464619390620.91911211165601221156055130
Percentage of ProfitLoss100.0100.0100.0100.0100.0100.0100.0100.0100.099.899.699.497.399.540.746.946.547.447.847.7-90.451.150.763.546.956.443.845.349.342.21.267.956.939.540.952.643.437.540.965.3
Percentage of Revenues10.112.114.48.1-6.613.712.712.19.39.29.58.51.75.72.63.23.43.94.04.71.34.33.63.43.32.12.03.02.21.70.03.23.02.22.43.62.81.71.63.4
Percentage of Revenues us-gaap:RetainedEarnings0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

Net Cash Provided By Used In Investing Activities

us-gaap:NetCashProvidedByUsedInInvestingActivities

us-gaap:NetCashProvidedByUsedInInvestingActivities


Net
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value-153.874-170.691-288.658-426.985-590.094-964.792-1120.884-1015.813-767.232-864.829-630.068-883.419-345.749-255.652-173.036-210.866-74.268-109.463-130.857-186.109-128.532-169.947-248.538-286.409-321.997-333.775-1374.087-371.64-381.162-439.334-761.34-837.091-548.793-494.807-615.615-460.133-424.052-314.399-474.739-387.998-319.404-189.485-213.804249-103.509-66.376
Percentage of NetCashProvidedByUsedInInvestingActivities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Revenues-4.5-5.3-11.2-19.6-35.5-45.2-42.1-44.9-31.2-31.1-20.1-26.0-11.7-8.2-4.6-7.3-2.7-4.0-4.9-7.9-6.0-9.6-12.9-15.1-15.1-18.5-48.3-11.9-12.4-13.9-18.4-23.4-16.4-14.0-16.8-15.2-16.8-9.2-11.7-10.8-9.1-4.9-6.58.5-3.7-1.7

Payments To Acquire Property Plant And Equipment

us-gaap:PaymentsToAcquirePropertyPlantAndEquipment

us-gaap:PaymentsToAcquirePropertyPlantAndEquipment


Payments
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value147176271380594949110910198308898316943502641811358211213315813619625730028534357438239242965853755950162745843234847333832919422617611168
Percentage of PaymentsToAcquirePropertyPlantAndEquipment100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:PaymentsToAcquirePropertyPlantAndEquipment us-gaap:StatementBusinessSegments

oke:NaturalGasGatheringAndProcessing


Payments
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-31
Value5639836311818125224521321526121310811198853763849984141195231205255392214168122199204206163
Percentage of PaymentsToAcquirePropertyPlantAndEquipment38.622.430.716.619.919.122.824.125.724.231.430.731.042.254.163.344.956.063.663.061.972.075.777.171.974.268.456.242.828.630.338.136.832.7

oke:NaturalGasLiquids


Payments
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-31
Value59112150298459746827738591639519444216124542712202030203440525973160153210273354230269274
Percentage of PaymentsToAcquirePropertyPlantAndEquipment40.763.455.678.677.478.674.672.471.371.962.564.161.847.229.920.015.018.115.319.315.217.415.817.620.721.427.940.253.763.653.742.948.254.7

oke:NaturalGasPipelines


Payments
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-31
Value272131121016212721284731201924182625242429171814159.59217108.716.62712116.0075.342
Percentage of PaymentsToAcquirePropertyPlantAndEquipment18.912.011.63.41.81.71.92.72.63.25.74.55.87.513.713.932.522.218.415.521.49.17.14.95.52.83.02.82.21.51.92.11.11.1

oke:TotalSegments


Payments
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-31
Value1441722653745889441101101182688382868934625617713176108129154134193
Percentage of PaymentsToAcquirePropertyPlantAndEquipment98.197.897.998.699.199.499.399.399.599.399.599.398.797.097.797.292.496.397.397.798.598.6

us-gaap:IntersegmentElimination


Payments
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-31
Value2.7533.9055.7295.1435.3945.2967.8117.6244.0696.5313.824.9674.6327.9194.1233.8226.2934.1193.5463.5972.1122.7593.5611.5085.4675.4884.3562.8335.082267.6354.6329.043.8723.6178.6333.99.196
Percentage of PaymentsToAcquirePropertyPlantAndEquipment1.92.22.11.40.90.60.70.70.50.70.50.71.33.02.32.87.63.72.72.31.51.41.40.51.91.60.80.71.36.31.20.91.60.80.61.90.92.6

Net Cash Provided By Used In Financing Activities

us-gaap:NetCashProvidedByUsedInFinancingActivities

us-gaap:NetCashProvidedByUsedInFinancingActivities


Net
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value-418.828-484.709-429.915-438.3286901052-151.4011056398527-112.69439-164.079-259.388-180.863-402.934-277.97-97.694-287.371-147.801-129.678-19.942-4.126-262.13613360980-169.6474849.865-142.0921349121-416.362-7.6761213-468.74559470-95.188-300.927380120-471.0056.917-354.307
Percentage of NetCashProvidedByUsedInFinancingActivities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Revenues-12.4-15.2-16.7-20.241.649.3-5.746.716.219.0-3.612.9-5.5-8.4-4.8-13.9-10.2-3.6-10.8-6.3-6.1-1.1-0.2-13.80.720.034.5-5.415.80.3-3.437.83.6-11.8-0.240.1-18.517.41.7-2.6-8.69.83.7-16.00.2-9.0

Proceeds From Issuance Of Long Term Debt

us-gaap:ProceedsFromIssuanceOfLongTermDebt

us-gaap:ProceedsFromIssuanceOfLongTermDebt


Proceeds
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value0.00.0149617480.01992750144255012450.00.00.42911900.00.00.00.00.010000.04920.07980.0-1199.9940.011990.012470.00.00.012950.06990.00.00.012950.00.00.00.0
Percentage of ProceedsFromIssuanceOfLongTermDebt0.00.0100.0100.00.0100.0100.0100.0100.0100.00.00.0100.0100.00.00.00.00.00.0100.00.0100.00.0100.00.0100.00.0100.00.0100.00.00.00.0100.00.0100.00.00.00.0100.00.00.00.00.0

Repayments Of Long Term Debt

us-gaap:RepaymentsOfLongTermDebt

us-gaap:RepaymentsOfLongTermDebt


Repayments
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value125623271353521.9125511.9125011.9124261.9125011.9129881.9471.9514511.9662.0036521.9581.921.9271.9481.9111.9131.9225512.0661.9141.9131.9752.2133.0783533.0823.157934032283.0673.1052533.333
Percentage of RepaymentsOfLongTermDebt100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Payments Of Dividends

us-gaap:PaymentsOfDividends

us-gaap:PaymentsOfDividends


Payments
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value4164164154153873863783673573543513393273162852831291291291291291291281281261261221211168378787473676763635757555551484646
Percentage of PaymentsOfDividends100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Deferred Tax Liabilities

us-gaap:DeferredTaxLiabilities

us-gaap:DeferredTaxLiabilities


Deferred
Period End2020-12-312019-12-312018-12-312016-12-312015-12-312014-12-312013-12-312012-12-31
Value66953621916131418129418971631
Percentage of DeferredTaxLiabilities100.0100.0100.0100.0100.0100.0100.0100.0

Deferred Tax Assets Net

us-gaap:DeferredTaxAssetsNet

us-gaap:DeferredTaxAssetsNet


Deferred
Period End2020-12-312019-12-312018-12-312017-12-312016-12-31
Value18541131581294210
Percentage of DeferredTaxAssetsNet100.0100.0100.0100.0100.0

Proceeds From Repayments Of Short Term Debt

us-gaap:ProceedsFromRepaymentsOfShortTermDebt

us-gaap:ProceedsFromRepaymentsOfShortTermDebt


Proceeds
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-31
Value0.00.00.0-220.02200.00.00.0-120.0-36.0156-614.673-317.577-342.157-16.322180416117131-101.773
Percentage of ProceedsFromRepaymentsOfShortTermDebt0.00.00.0100.0100.00.00.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

oke:AdjustedEBITDA us-gaap:StatementBusinessSegments

oke:AdjustedEBITDA

oke:NaturalGasGatheringAndProcessing


Adjusted
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-06-302015-03-31
Value229204218183881591881751861521741591661301441411281031261091101007860
Percentage of AdjustedEBITDA100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

oke:NaturalGasLiquids


Adjusted
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-06-302015-03-31
Value480435417451337410373367346377347399352342309293273278253279276270244192
Percentage of AdjustedEBITDA209.5212.8191.1246.4380.4257.4198.4209.6185.8248.0199.0250.0211.0262.0214.5207.1213.1267.6200.3254.2250.8270.1313.3318.3

oke:NaturalGasPipelines


Adjusted
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-06-302015-03-31
Value94226105109109112971031001069790859388878082898068746570
Percentage of AdjustedEBITDA41.3110.548.260.0123.870.551.959.253.970.155.656.551.271.761.561.762.979.871.073.162.174.383.6116.8

oke:TotalSegments


Adjusted
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-31
Value804866741744536683660646633636619648604566542523482465470469455444
Percentage of AdjustedEBITDA350.8423.3339.2406.4604.2427.9350.3368.9339.7418.1354.6406.5362.1433.7375.9368.7376.0447.4371.3427.4412.9444.4

oke:AggregateAmountOfCommonSharesAvailableForIssuanceAndSaleUnderEquityDistributionAgreement dei:LegalEntity

oke:AggregateAmountOfCommonSharesAvailableForIssuanceAndSaleUnderEquityDistributionAgreement

oke:ONEOK


Aggregate
Period End2020-09-30
Value1000
Percentage of AggregateAmountOfCommonSharesAvailableForIssuanceAndSaleUnderEquityDistributionAgreement100.0

oke:CommonStockDividendsPerShareDeclaredAnnualized us-gaap:SubsequentEventType

oke:CommonStockDividendsPerShareDeclaredAnnualized

us-gaap:SubsequentEvent


Common
Period End2021-03-31
Value3.74
Percentage of CommonStockDividendsPerShareDeclaredAnnualized100.0

oke:ContractwithCustomerLiabilityNetAdditions

oke:ContractwithCustomerLiabilityNetAdditions


Contractwith
Period End2021-06-302021-03-312020-12-31
Value2012-3.9
Percentage of ContractwithCustomerLiabilityNetAdditions100.0100.0100.0

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

oke:DerivativeInstrumentsGainLossReclassifiedfromAccumulatedOCIintoIncomeNet

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


Derivative
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-31
Value8611-1.568-14.45-15.039-11.451-19.706-8.075-4.97
Percentage of DerivativeInstrumentsGainLossReclassifiedfromAccumulatedOCIintoIncomeNet100.0100.0100.0100.0100.0100.0100.0100.0100.0

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


Derivative
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-03-31
Value-130.518-14.8682.1675344-35.0338151812-20.63-10.189-11.611-15.319
Percentage of DerivativeInstrumentsGainLossReclassifiedfromAccumulatedOCIintoIncomeNet-151.0-125.1-138.2-367.7-299.2305.9-194.0-188.8-379.30.00.00.00.00.0

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


Derivative
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-03-31
Value-9.666-9.859-8.998-64.541-10.278-9.008-6.903-4.815-2.504-4.358-4.383-5.602-3.943-5.329
Percentage of DerivativeInstrumentsGainLossReclassifiedfromAccumulatedOCIintoIncomeNet-11.2-82.9573.9446.768.378.735.059.650.40.00.00.00.00.0

oke:DerivativeInstrumentsGainLossReclassifiedfromAccumulatedOCIintoIncomeNet us-gaap:DerivativeInstrumentsGainLossByHedgingRelationship

us-gaap:CashFlowHedging


Derivative
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-03-31
Value-53.748-12.84-8.399-25.85319-11.2871110168.476-25.013-15.791-15.554-20.648
Percentage of DerivativeInstrumentsGainLossReclassifiedfromAccumulatedOCIintoIncomeNet-62.2-108.0535.7178.9-130.998.6-59.0-129.2-328.90.00.00.00.00.0

oke:DerivativeInstrumentsGainLossRecognizedinOtherComprehensiveLossNet us-gaap:DerivativeInstrumentRisk, us-gaap:DerivativeInstrumentsGainLossByHedgingRelationship

oke:DerivativeInstrumentsGainLossRecognizedinOtherComprehensiveLossNet

us-gaap:CommodityContract, us-gaap:CashFlowHedging


Derivative
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-03-31
Value-175.477-63.43-24.171-29.667-39.05687-5.0583233-21.625109-30.783-46.3882027
Percentage of DerivativeInstrumentsGainLossRecognizedinOtherComprehensiveLossNet100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:InterestRateContract, us-gaap:CashFlowHedging


Derivative
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-03-31
Value-49.269106289.213-21.372-225.04172-128.041-107.398-67.912-130.7632620231.529
Percentage of DerivativeInstrumentsGainLossRecognizedinOtherComprehensiveLossNet28.1-167.6-118.3-31.154.7-258.1-1435.0-398.0-322.2314.0-119.5-85.1-43.3114.35.6

oke:DerivativeInstrumentsGainLossRecognizedinOtherComprehensiveLossNet us-gaap:DerivativeInstrumentsGainLossByHedgingRelationship

us-gaap:CashFlowHedging


Derivative
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-03-31
Value-224.746424.413-20.454-60.428-137.84667-95.872-74.064-89.537-21.3-4.58-26.3234428
Percentage of DerivativeInstrumentsGainLossRecognizedinOtherComprehensiveLossNet128.1-67.6-18.368.9154.7-158.1-1335.0-298.0-222.2414.0-19.514.956.7214.3105.6

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

oke:ImpairmentOfEquityMethodInvestmentDifferenceBetweenCarryingAmountAndUnderlyingEquity

oke:NaturalGasGatheringAndProcessing, oke:VeniceEnergyServicesCompany


Impairment
Period End2020-09-302020-06-302020-03-31
Value0.00.022
Percentage of ImpairmentOfEquityMethodInvestmentDifferenceBetweenCarryingAmountAndUnderlyingEquity0.00.0100.0

oke:Impairmentoflonglivedassetsgoodwillandotherassetimpairmentcharges

oke:Impairmentoflonglivedassetsgoodwillandotherassetimpairmentcharges


Impairmentoflonglivedassetsgoodwillandotherassetimpairmentcharges
Period End2020-12-312020-09-302020-06-302020-03-312019-06-302019-03-31
Value3.1760.00.06040.00.0
Percentage of Impairmentoflonglivedassetsgoodwillandotherassetimpairmentcharges100.00.00.0100.00.00.0

oke:IncreaseDecreaseInCommodityExchangesAndImbalancesNet

oke:IncreaseDecreaseInCommodityExchangesAndImbalancesNet


Increase
Period End2021-03-312020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-31
Value18-37.919-4.6459.638-7.5760.649-59.6813123-39.755472.13-8.0221.888-9.13823282.968-29.8115.2315.4415-57.14-17.384-19.3853.555-2.9598.611-1.584-56.30126-7.735126-101.6048.273-50.7075.64-18.092
Percentage of IncreaseDecreaseInCommodityExchangesAndImbalancesNet100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

oke:LongtermDebtRepurchasedFaceAmount

oke:LongtermDebtRepurchasedFaceAmount


Longterm
Period End2021-03-312020-12-312020-09-302020-06-30
Value552228107
Percentage of LongtermDebtRepurchasedFaceAmount100.0100.0100.0100.0

oke:NotionalAmountOfCashFlowHedgeInstrumentsSettled

oke:NotionalAmountOfCashFlowHedgeInstrumentsSettled


Notional
Period End2020-12-312020-09-302020-06-302020-03-31
Value0.00.01300750
Percentage of NotionalAmountOfCashFlowHedgeInstrumentsSettled0.00.0100.0100.0

oke:OtherComprehensiveIncomeLossAmountAttributabletoEquityMethodInvestmentsbeforeReclassificationAdjustmentsNetofTax

oke:OtherComprehensiveIncomeLossAmountAttributabletoEquityMethodInvestmentsbeforeReclassificationAdjustmentsNetofTax


Other
Period End2021-06-302021-03-312020-12-31
Value-3721000.07372000.02258000.0
Percentage of OtherComprehensiveIncomeLossAmountAttributabletoEquityMethodInvestmentsbeforeReclassificationAdjustmentsNetofTax100.0100.0100.0

oke:OtherComprehensiveIncomeLossBeforeReclassifications

oke:OtherComprehensiveIncomeLossBeforeReclassifications


Other
Period End2021-06-302021-03-312020-12-31
Value-176.7540-34.744
Percentage of OtherComprehensiveIncomeLossBeforeReclassifications100.0100.0100.0

oke:OtherComprehensiveIncomeLossPortionAttributabletoEquityMethodInvestmentsNetofTax

oke:OtherComprehensiveIncomeLossPortionAttributabletoEquityMethodInvestmentsNetofTax


Other
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-06-302015-03-31
Value-3.2447.832.7231.112-3.561-7.6433.388-4.399-3.683-2.511-2.8571.480.9772.8240.244-0.169-1.370.3258.726-0.6-4.714-4.9170.00.0
Percentage of OtherComprehensiveIncomeLossPortionAttributabletoEquityMethodInvestmentsNetofTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.00.0

oke:OtherComprehensiveIncomeLossPortionAttributabletoEquityMethodInvestmentsNetofTaxAttributabletoParent

oke:OtherComprehensiveIncomeLossPortionAttributabletoEquityMethodInvestmentsNetofTaxAttributabletoParent


Other
Period End2021-06-302021-03-31
Value-3244000.07830000.0
Percentage of OtherComprehensiveIncomeLossPortionAttributabletoEquityMethodInvestmentsNetofTaxAttributabletoParent100.0100.0

oke:OtherComprehensiveIncomeLossPortionAttributabletoEquityMethodInvestmentsTax

oke:OtherComprehensiveIncomeLossPortionAttributabletoEquityMethodInvestmentsTax


Other
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-06-302015-03-31
Value970000.0-2339000.0-814000.0-332000.01064000.02283000.0-1012000.01314000.01100000.0750000.0854000.0-442000.0-292000.0-844000.0433000.0-100000.0-246000.058000.01570000.0-108000.0-848000.0-884000.000
Percentage of OtherComprehensiveIncomeLossPortionAttributabletoEquityMethodInvestmentsTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.00.0

oke:OtherComprehensiveIncomeLossReclassificationAdjustmentIncludedInNetIncomeNetOfTax

oke:OtherComprehensiveIncomeLossReclassificationAdjustmentIncludedInNetIncomeNetOfTax


Other
Period End2021-06-302021-03-312020-12-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-31
Value-40.903-45.65-13.913-11.2476.4626.1949.7843.206-22.437-15.326-15.156-25.528-15.152-5.466-7.721-3.938-2.8590.5520.6953.072.6910.1-0.261-0.615-3.3894.1312411107.69818
Percentage of OtherComprehensiveIncomeLossReclassificationAdjustmentIncludedInNetIncomeNetOfTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

oke:OtherComprehensiveIncomeLossReclassificationAdjustmentfromAOCIforOtherComprehensiveIncomeAttributabletoEquityMethodInvestmentsNetofTax

oke:OtherComprehensiveIncomeLossReclassificationAdjustmentfromAOCIforOtherComprehensiveIncomeAttributabletoEquityMethodInvestmentsNetofTax


Other
Period End2021-06-302021-03-312020-12-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value-477000.0-458000.0-465000.0-96000.0-46000.014000.058000.0-83000.040000.0-21000.036000.0-65000.0-52000.0-22000.0-25000.0
Percentage of OtherComprehensiveIncomeLossReclassificationAdjustmentfromAOCIforOtherComprehensiveIncomeAttributabletoEquityMethodInvestmentsNetofTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

oke:OtherCorporateCostsandNoncashItems

oke:OtherCorporateCostsandNoncashItems


Other
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-30
Value2.342-0.715-2.107-5.865-1.578-33.081-19.786-20.711-14.541-13.729-10.219-3.292.659-4.753-5.3225.783436.5-4.797-0.3624.684
Percentage of OtherCorporateCostsandNoncashItems100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

oke:PublicUtilitiesAllowanceforFundsUsedDuringConstructionCapitalizedCostofEquityandOther us-gaap:StatementBusinessSegments

oke:PublicUtilitiesAllowanceforFundsUsedDuringConstructionCapitalizedCostofEquityandOther

oke:NaturalGasGatheringAndProcessing


Public
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-31
Value2.2873.1513.8170.6551.978-4.4982.5662.8831.5713.9450.1391.7033.2921.8732.0332.7740.650.234-0.6950.9220.2581.115
Percentage of PublicUtilitiesAllowanceforFundsUsedDuringConstructionCapitalizedCostofEquityandOther100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

oke:NaturalGasLiquids


Public
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-31
Value4.4766.6477.2071.8986.262-6.6193.3184.1742.7385.7060.042.2684.6712.852.6053.094-0.552-0.041-0.826-0.029-0.283-0.436
Percentage of PublicUtilitiesAllowanceforFundsUsedDuringConstructionCapitalizedCostofEquityandOther195.7210.9188.8289.8316.6147.2129.3144.8174.3144.628.8133.2141.9152.2128.1111.5-84.9-17.5118.8-3.1-109.7-39.1

oke:NaturalGasPipelines


Public
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-31
Value1.1141.7031.7240.4271.355-1.9661.046-0.7011.51.1320.2111.052.3880.2630.820.203-0.061.284-1.2824.871-1.1183.059
Percentage of PublicUtilitiesAllowanceforFundsUsedDuringConstructionCapitalizedCostofEquityandOther48.754.045.265.268.543.740.8-24.395.528.7151.861.772.514.040.37.3-9.2548.7184.5528.3-433.3274.3

oke:TotalSegments


Public
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-31
Value7.87711122.989.595-13.0836.936.3565.809100.395.021104.9865.4586.0710.0381.477-2.8035.764-1.1433.738
Percentage of PublicUtilitiesAllowanceforFundsUsedDuringConstructionCapitalizedCostofEquityandOther344.4365.0334.0455.0485.1290.9270.1220.5369.8273.3280.6294.8314.4266.2268.5218.95.8631.2403.3625.2-443.0335.2

oke:RealizedLossonSettledInterestRateSwapsRecordedinAOCI

oke:RealizedLossonSettledInterestRateSwapsRecordedinAOCI


Realized
Period End2020-12-312020-09-302020-06-302020-03-31
Value0.00.048152
Percentage of RealizedLossonSettledInterestRateSwapsRecordedinAOCI0.00.0100.0100.0

us-gaap:AssetImpairmentCharges

us-gaap:AssetImpairmentCharges


Asset
Period End2020-12-312020-09-302020-06-302020-03-312019-06-302019-03-312018-12-312018-09-302017-12-312017-09-302016-12-312016-09-30
Value3.1760.00.06410.00.00.00.00.0200.00.0
Percentage of AssetImpairmentCharges100.00.00.0100.00.00.00.00.00.0100.00.00.0

us-gaap:AssetImpairmentCharges us-gaap:StatementBusinessSegments

oke:NaturalGasGatheringAndProcessing


Asset
Period End2020-12-312020-09-302020-06-302020-03-312017-12-312017-09-30
Value1.7920.00.05640.020
Percentage of AssetImpairmentCharges56.40.00.087.90.0100.0

oke:NaturalGasLiquids


Asset
Period End2020-12-312020-09-302020-06-302020-03-312017-12-312017-09-30
Value1.3840.00.0770.00.0
Percentage of AssetImpairmentCharges43.60.00.012.10.00.0

oke:TotalSegments


Asset
Period End2020-12-312020-09-302020-06-302020-03-312017-12-312017-09-30
Value3.1760.00.06410.020
Percentage of AssetImpairmentCharges100.00.00.0100.00.0100.0

us-gaap:BusinessCombinationConsiderationTransferred1

us-gaap:BusinessCombinationConsiderationTransferred1


Business
Period End2020-12-312018-09-30
Value27195
Percentage of BusinessCombinationConsiderationTransferred1100.0100.0

us-gaap:BusinessCombinationConsiderationTransferred1 us-gaap:SubsequentEventType

us-gaap:SubsequentEvent


Business
Period End2020-12-31
Value27
Percentage of BusinessCombinationConsiderationTransferred1100.0

us-gaap:CommonStockDividendsPerShareCashPaid

us-gaap:CommonStockDividendsPerShareCashPaid


Common
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312009-09-302009-06-302009-03-31
Value0.9350.9350.9350.9350.9350.9350.9150.890.8650.860.8550.8250.7950.770.7450.7450.6150.6150.6150.6150.6150.6150.6150.6050.6050.6050.590.5750.560.40.380.380.360.360.330.330.330.3050.560.560.560.520.520.460.440.440.420.420.40.4
Percentage of CommonStockDividendsPerShareCashPaid100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:CommonStockDividendsPerShareDeclared us-gaap:SubsequentEventType

us-gaap:CommonStockDividendsPerShareDeclared

us-gaap:SubsequentEvent


Common
Period End2021-09-302021-06-302021-03-312020-12-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302016-12-312016-09-302016-06-302015-12-312015-09-302015-06-30
Value0.9350.9350.9350.9350.8550.8250.7950.770.7450.7450.6150.6150.6150.6150.6150.6050.605
Percentage of CommonStockDividendsPerShareDeclared100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ContractWithCustomerLiabilityRevenueRecognized

us-gaap:ContractWithCustomerLiabilityRevenueRecognized


Contract
Period End2021-06-302021-03-312020-12-31
Value1.1201.0
Percentage of ContractWithCustomerLiabilityRevenueRecognized100.0100.0100.0

us-gaap:DefinedBenefitPlanAmortizationOfGainsLosses us-gaap:RetirementPlanType

us-gaap:DefinedBenefitPlanAmortizationOfGainsLosses

us-gaap:OtherPostretirementBenefitPlansDefinedBenefit


Defined
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-30
Value-1.841-0.001-0.002-0.001-0.001-0.001-0.075-0.074-0.074-0.074-0.336-0.334-0.334-0.334-0.42-0.419-0.42-0.42-0.262-0.262
Percentage of DefinedBenefitPlanAmortizationOfGainsLosses100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:PensionPlansDefinedBenefit


Defined
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-30
Value-4.913-4.913-4.593-4.571-4.571-4.571-3.175-3.158-3.158-3.158-4.286-4.258-4.258-4.258-3.41-3.392-3.392-3.392-2.756-2.737
Percentage of DefinedBenefitPlanAmortizationOfGainsLosses266.9491300.0229650.0457100.0457100.0457100.04233.34267.64267.64267.61275.61274.91274.91274.9811.9809.5807.6807.61051.91044.7

us-gaap:DefinedBenefitPlanAmortizationOfPriorServiceCostCredit us-gaap:RetirementPlanType

us-gaap:DefinedBenefitPlanAmortizationOfPriorServiceCostCredit

us-gaap:PensionPlansDefinedBenefit


Defined
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-06-302019-03-312018-03-312017-03-31
Value28000.028000.030000.028000.028000.028000.00000
Percentage of DefinedBenefitPlanAmortizationOfPriorServiceCostCredit100.0100.0100.0100.0100.0100.00.00.00.00.0

us-gaap:DefinedBenefitPlanContributionsByEmployer us-gaap:RetirementPlanType, us-gaap:SubsequentEventType

us-gaap:DefinedBenefitPlanContributionsByEmployer

us-gaap:PensionPlansDefinedBenefit, us-gaap:SubsequentEvent


Defined
Period End2021-03-312020-03-312019-03-312018-03-31
Value11121412
Percentage of DefinedBenefitPlanContributionsByEmployer100.0100.0100.0100.0

us-gaap:DefinedBenefitPlanExpectedReturnOnPlanAssets us-gaap:RetirementPlanType

us-gaap:DefinedBenefitPlanExpectedReturnOnPlanAssets

us-gaap:OtherPostretirementBenefitPlansDefinedBenefit


Defined
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-30
Value-0.0420.7220.7280.7220.7220.7220.5750.570.570.570.6740.6720.6720.6720.5650.5640.5640.5640.5310.531
Percentage of DefinedBenefitPlanExpectedReturnOnPlanAssets100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:PensionPlansDefinedBenefit


Defined
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-30
Value6.2696.2696.2686.2326.2326.2325.9245.8925.8925.8926.015.9695.9695.9695.3685.3365.3365.3365.1175.077
Percentage of DefinedBenefitPlanExpectedReturnOnPlanAssets-14926.2868.3861.0863.2863.2863.21030.31033.71033.71033.7891.7888.2888.2888.2950.1946.1946.1946.1963.7956.1

us-gaap:DefinedBenefitPlanInterestCost us-gaap:RetirementPlanType

us-gaap:DefinedBenefitPlanInterestCost

us-gaap:OtherPostretirementBenefitPlansDefinedBenefit


Defined
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-30
Value0.2840.4420.4450.4420.4420.4420.5110.5090.5090.5090.5270.5270.5270.5270.5660.5650.5650.5650.6010.601
Percentage of DefinedBenefitPlanInterestCost100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:PensionPlansDefinedBenefit


Defined
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-30
Value4.224.224.5964.5744.5744.5745.155.1265.1265.1264.4354.4084.4084.4084.684.6554.6554.6554.984.946
Percentage of DefinedBenefitPlanInterestCost1485.9954.81032.81034.81034.81034.81007.81007.11007.11007.1841.6836.4836.4836.4826.9823.9823.9823.9828.6823.0

us-gaap:DefinedBenefitPlanNetPeriodicBenefitCost us-gaap:RetirementPlanType

us-gaap:DefinedBenefitPlanNetPeriodicBenefitCost

us-gaap:OtherPostretirementBenefitPlansDefinedBenefit


Defined
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-30
Value2.262-0.164-0.166-0.164-0.164-0.1640.0720.0730.0730.073-0.016-0.015-0.015-0.0150.1710.170.1710.1710.0650.065
Percentage of DefinedBenefitPlanNetPeriodicBenefitCost100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:PensionPlansDefinedBenefit


Defined
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-30
Value4.9684.9684.9974.9774.9774.9774.3644.3464.3464.3464.5544.5294.5294.5294.4534.4324.4334.4334.2544.228
Percentage of DefinedBenefitPlanNetPeriodicBenefitCost219.6-3029.3-3010.2-3034.8-3034.8-3034.86061.15953.45953.45953.4-28462.5-30193.3-30193.3-30193.32604.12607.12592.42592.46544.66504.6

us-gaap:DefinedBenefitPlanServiceCost us-gaap:RetirementPlanType

us-gaap:DefinedBenefitPlanServiceCost

us-gaap:OtherPostretirementBenefitPlansDefinedBenefit


Defined
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-30
Value0.0950.1150.1150.1150.1150.1150.1170.1170.1170.1170.2120.2110.2110.2110.1670.1650.1650.1650.1490.149
Percentage of DefinedBenefitPlanServiceCost100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:PensionPlansDefinedBenefit


Defined
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-30
Value2.0762.0762.0462.0362.0362.0361.9631.9541.9541.9541.8431.8321.8321.8321.7311.7211.7221.7221.6351.622
Percentage of DefinedBenefitPlanServiceCost2185.31805.21779.11770.41770.41770.41677.81670.11670.11670.1869.3868.2868.2868.21036.51043.01043.61043.61097.31088.6

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

us-gaap:DerivativeNonmonetaryNotionalAmountVolume

oke:Basis, oke:NetPurchasorSellor, srt:NaturalGasReserves, oke:Futuresandswaps, us-gaap:DesignatedAsHedgingInstrument


Derivative
Period End2021-03-31
Value-80.9
Percentage of DerivativeNonmonetaryNotionalAmountVolume100.0

oke:Basis, oke:Purchasor, srt:NaturalGasReserves, oke:Futuresandswaps, us-gaap:DesignatedAsHedgingInstrument


Derivative
Period End2020-09-30
Value-4.1
Percentage of DerivativeNonmonetaryNotionalAmountVolume0.0

oke:Basis, oke:Purchasor, srt:NaturalGasReserves, oke:Futuresandswaps, us-gaap:Nondesignated


Derivative
Period End2020-09-30
Value-0.3
Percentage of DerivativeNonmonetaryNotionalAmountVolume0.0

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


Derivative
Period End2020-12-312020-09-30
Value84.24.5
Percentage of DerivativeNonmonetaryNotionalAmountVolume0.00.0

oke:Basis, oke:Sellor, srt:NaturalGasReserves, oke:Futuresandswaps, us-gaap:Nondesignated


Derivative
Period End2020-09-30
Value0.3
Percentage of DerivativeNonmonetaryNotionalAmountVolume0.0

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


Derivative
Period End2021-03-31
Value-10.9
Percentage of DerivativeNonmonetaryNotionalAmountVolume13.5

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


Derivative
Period End2021-03-31
Value-80.9
Percentage of DerivativeNonmonetaryNotionalAmountVolume100.0

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


Derivative
Period End2020-09-30
Value1.5
Percentage of DerivativeNonmonetaryNotionalAmountVolume0.0

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


Derivative
Period End2021-06-302021-03-312020-12-31
Value-0.20.50.6
Percentage of DerivativeNonmonetaryNotionalAmountVolume0.0-0.60.0

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


Derivative
Period End2020-09-30
Value-4.1
Percentage of DerivativeNonmonetaryNotionalAmountVolume0.0

oke:FixedPrice, oke:Purchasor, srt:NaturalGasReserves, oke:Futuresandswaps, us-gaap:Nondesignated


Derivative
Period End2020-09-30
Value-0.3
Percentage of DerivativeNonmonetaryNotionalAmountVolume0.0

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


Derivative
Period End2020-12-312020-09-30
Value27.3-0.2
Percentage of DerivativeNonmonetaryNotionalAmountVolume0.00.0

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


Derivative
Period End2021-06-302021-03-312020-12-31
Value0.8-0.5-0.6
Percentage of DerivativeNonmonetaryNotionalAmountVolume0.00.60.0

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


Derivative
Period End2020-12-312020-09-30
Value84.24.5
Percentage of DerivativeNonmonetaryNotionalAmountVolume0.00.0

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


Derivative
Period End2020-09-30
Value0.3
Percentage of DerivativeNonmonetaryNotionalAmountVolume0.0

us-gaap:DirectOperatingCosts

us-gaap:DirectOperatingCosts


Direct
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-30
Value254251249204224207259245237240236230230210216207217191204184191177184164165179181172172149260236233259224229231224249209225221220203203
Percentage of DirectOperatingCosts100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DirectOperatingCosts us-gaap:StatementBusinessSegments

oke:NaturalGasGatheringAndProcessing


Direct
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-31
Value86849469788497918594969093888480737177696969786163696964596451454451
Percentage of DirectOperatingCosts34.033.637.833.835.040.837.537.236.139.140.639.540.742.039.038.733.637.437.837.736.139.342.537.338.438.738.237.334.543.519.819.019.319.9

oke:NaturalGasLiquids


Direct
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-31
Value12812411510110689116114114110104101998810390877890798373807477827876766565575459
Percentage of DirectOperatingCosts50.749.446.149.447.743.345.046.948.345.944.343.943.342.147.743.640.141.044.543.343.741.343.545.446.845.943.244.644.243.725.224.123.223.1

oke:NaturalGasPipelines


Direct
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-31
Value38424034333344403636393634333329303130282927262625272827272725232427
Percentage of DirectOperatingCosts15.116.816.316.914.716.117.016.415.415.116.715.915.215.815.614.414.216.515.015.415.215.514.416.215.315.215.616.215.918.49.89.910.710.5

oke:TotalSegments


Direct
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-31
Value253251250205218207257246237240240228228210221200191182198177182170
Percentage of DirectOperatingCosts99.899.9100.2100.197.4100.199.5100.599.8100.1101.799.299.1100.0102.396.787.895.097.396.495.096.2

us-gaap:IntersegmentElimination


Direct
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-31
Value0.490.313-0.554-0.2125.727-0.3081.354-1.1650.413-0.212-4.0221.7321.9820.063-4.9126.781269.6375.5056.5649.5776.714-0.6591.877-0.850.3215.5273.2729.268-8.2777.0232.8271.111-0.02-0.1780.232-0.501-1.637
Percentage of DirectOperatingCosts0.20.1-0.2-0.12.6-0.10.5-0.50.2-0.1-1.70.80.90.0-2.33.312.25.02.73.65.03.8-0.41.1-0.50.23.01.95.4-5.62.71.20.5-0.0-0.10.1-0.2-0.7

us-gaap:DividendsCommonStock

us-gaap:DividendsCommonStock


Dividends
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-30
Value416416415387386367357354351339327316286283
Percentage of DividendsCommonStock100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DividendsCommonStock us-gaap:StatementEquityComponents

us-gaap:AdditionalPaidInCapital


Dividends
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-30
Value743011038738658451759264611222117
Percentage of DividendsCommonStock17.97.326.7100.0100.016.012.84.916.87.914.33.877.841.5

us-gaap:RetainedEarnings


Dividends
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-30
Value3413853040.00.030831133629231228030463165
Percentage of DividendsCommonStock82.192.773.30.00.084.087.295.183.292.185.796.222.058.5

us-gaap:DividendsPreferredStock

us-gaap:DividendsPreferredStock


Dividends
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-30
Value275000.0275000.0275000.0275000.0275000.0275000.0275000.0275000.0275000.0275000.0275000.0275000.0274000.0710000.0
Percentage of DividendsPreferredStock100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DividendsPreferredStock us-gaap:StatementEquityComponents

us-gaap:RetainedEarnings


Dividends
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-30
Value275000.0275000.0275000.000275000.0275000.0275000.0275000.0275000.0550000.0000
Percentage of DividendsPreferredStock100.0100.0100.00.00.0100.0100.0100.0100.0100.0200.00.00.00.0

us-gaap:DividendsPreferredStock us-gaap:SubsequentEventType

us-gaap:SubsequentEvent


Dividends
Period End2021-09-302021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-30
Value300000.0300000.0300000.0300000.0300000.0300000.0300000.0300000.0300000.0300000.0300000.0300000.0300000.0300000.0300000.0275000.0352000.0
Percentage of DividendsPreferredStock0.0109.1109.10.0109.1109.1109.10.0109.1109.1109.1109.1109.1109.1109.1100.449.6

us-gaap:DividendsPreferredStockCash

us-gaap:DividendsPreferredStockCash


Dividends
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-312017-12-312017-09-30
Value300000.0300000.0300000.0300000.0300000.0300000.0300000.0300000.0300000.0300000.0300000.0100000.0400000.0
Percentage of DividendsPreferredStockCash100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:EmployeeBenefitsAndShareBasedCompensationNoncash

us-gaap:EmployeeBenefitsAndShareBasedCompensationNoncash


Employee
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-30
Value7.825167.2791.6060.957-1.3026.2879.7575.1155.54105.829129.2263.6314.8833.261.647113.165
Percentage of EmployeeBenefitsAndShareBasedCompensationNoncash100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:EquityMethodInvestmentDividendsOrDistributions

us-gaap:EquityMethodInvestmentDividendsOrDistributions


Equity
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-03-31
Value2730343730414239354544414341424242393834254663303229332330302727282327233236453127272721
Percentage of EquityMethodInvestmentDividendsOrDistributions100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:EquityMethodInvestmentOtherThanTemporaryImpairment

us-gaap:EquityMethodInvestmentOtherThanTemporaryImpairment


Equity
Period End2020-12-312020-09-302020-06-302020-03-312019-06-302019-03-312018-12-312018-09-302017-12-312017-09-302016-12-312016-09-302014-12-312013-12-31
Value0.00.00.0370.00.00.00.00.04.270.00.01290.0
Percentage of EquityMethodInvestmentOtherThanTemporaryImpairment0.00.00.0100.00.00.00.00.00.0100.00.00.0100.00.0

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

oke:NaturalGasGatheringAndProcessing, oke:VeniceEnergyServicesCompany


Equity
Period End2020-09-302020-06-302020-03-31
Value0.00.030
Percentage of EquityMethodInvestmentOtherThanTemporaryImpairment0.00.080.8

oke:NaturalGasLiquids, oke:ChisholmPipelineCompany


Equity
Period End2020-09-302020-06-302020-03-31
Value0.00.07.2
Percentage of EquityMethodInvestmentOtherThanTemporaryImpairment0.00.019.1

us-gaap:FairValueNetDerivativeAssetLiabilityMeasuredOnRecurringBasisUnobservableInputsReconciliationGainLossIncludedInOtherComprehensiveIncomeLoss

us-gaap:FairValueNetDerivativeAssetLiabilityMeasuredOnRecurringBasisUnobservableInputsReconciliationGainLossIncludedInOtherComprehensiveIncomeLoss


Fair
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-30
Value-77.425-30.5997.64-2.7-20.74721128.9417.745-5.1915.332-7.554-26.584
Percentage of FairValueNetDerivativeAssetLiabilityMeasuredOnRecurringBasisUnobservableInputsReconciliationGainLossIncludedInOtherComprehensiveIncomeLoss100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:FairValueNetDerivativeAssetLiabilityMeasuredOnRecurringBasisUnobservableInputsReconciliationSettlements

us-gaap:FairValueNetDerivativeAssetLiabilityMeasuredOnRecurringBasisUnobservableInputsReconciliationSettlements


Fair
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-31
Value1724-2.189-6.194-34.478-16.146-2.3-12.38-8.83-25.361
Percentage of FairValueNetDerivativeAssetLiabilityMeasuredOnRecurringBasisUnobservableInputsReconciliationSettlements100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:FairValueNetDerivativeAssetLiabilityMeasuredOnRecurringBasisUnobservableInputsReconciliationTransfersIntoLevel3

us-gaap:FairValueNetDerivativeAssetLiabilityMeasuredOnRecurringBasisUnobservableInputsReconciliationTransfersIntoLevel3


Fair
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-31
Value-20.262-4.612-31.428-2.0333.40720132.7284.5451.597
Percentage of FairValueNetDerivativeAssetLiabilityMeasuredOnRecurringBasisUnobservableInputsReconciliationTransfersIntoLevel3100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:FinanceLeasePrincipalPayments

us-gaap:FinanceLeasePrincipalPayments


Finance
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-31
Value506000.0493000.0481000.0469000.0457000.0447000.0435000.0425000.0
Percentage of FinanceLeasePrincipalPayments100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:GainLossOnSaleOfPropertyPlantEquipment

us-gaap:GainLossOnSaleOfPropertyPlantEquipment


Gain
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value0.7070.2690.7670.0170.3390.2040.3070.016-2.9580.060.2530.1630.0960.0890.020.2740.637-0.0070.0985.744-0.4134.2066.239-0.7260.122-0.0065.0661.534-0.0160.015110.0220.2790.041-7.339-0.420.966-0.0570.172-0.0690.2120.51-3.551-16.1260.2720.786
Percentage of GainLossOnSaleOfPropertyPlantEquipment100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:GoodwillImpairmentLoss oke:ReportableSegmentByName

us-gaap:GoodwillImpairmentLoss

oke:NaturalGasGatheringAndProcessing


Goodwill
Period End2020-09-302020-06-302020-03-31
Value0.00.0153
Percentage of GoodwillImpairmentLoss0.00.0100.0

us-gaap:ImpairmentOfLongLivedAssetsHeldForUse oke:ReportableSegmentByName

us-gaap:ImpairmentOfLongLivedAssetsHeldForUse

oke:NaturalGasGatheringAndProcessing


Impairment
Period End2020-09-302020-06-302020-03-31
Value0.00.0380
Percentage of ImpairmentOfLongLivedAssetsHeldForUse0.00.0100.0

oke:NaturalGasLiquids


Impairment
Period End2020-09-302020-06-302020-03-31
Value0.00.070
Percentage of ImpairmentOfLongLivedAssetsHeldForUse0.00.018.4

us-gaap:IncomeLossFromEquityMethodInvestments

us-gaap:IncomeLossFromEquityMethodInvestments


Income
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value253335382544393734434239364040403939393532323232303034-52.347253330272625302829343332293230292021
Percentage of IncomeLossFromEquityMethodInvestments100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:IncomeLossFromEquityMethodInvestments us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName

oke:NorthernBorderPipeline


Income
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-30
Value122018221222181613201816151717161518171715181516151916141523161615161818162019191620192112
Percentage of IncomeLossFromEquityMethodInvestments48.960.752.257.950.849.646.442.940.147.844.941.941.742.642.941.039.747.645.250.848.656.749.350.150.863.747.2-27.562.469.555.059.957.863.459.463.655.158.457.861.655.565.064.272.159.8

oke:OtherUnconsolidatedAffiliate


Income
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-30
Value0.7932.360.589-0.031-2.3241.963-1.273-1.428-1.113-1.053-0.0410.443-0.4581.705-11.9557.8258.8577.1818.3243.4153.0410.9365.555.555.1444.3321.7312.152.031.791.6231.7161.9081.9851.7490.6683.1223.6992.3023.1352.2332.4061.1871.8992.912
Percentage of IncomeLossFromEquityMethodInvestments3.17.11.7-0.1-9.24.4-3.2-3.8-3.3-2.4-0.11.1-1.34.2-29.719.522.518.221.29.79.42.817.317.217.114.05.1-4.18.05.35.36.27.27.75.72.310.710.76.99.87.67.53.96.514.1

oke:OverlandPassPipelineCompany


Income
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-30
Value4.7392.9728.5288.0077.972141515151717161616151514131313131310109.6236.887133.8564.1214.7316.2515.7835.5282.8994.2574.495.9795.3175.4614.3385.364.3764.411.0110.0
Percentage of IncomeLossFromEquityMethodInvestments18.48.924.221.031.531.639.041.245.340.040.640.944.440.839.339.437.834.333.639.542.040.433.432.732.022.338.5-7.416.214.120.321.120.911.213.915.720.515.416.313.518.113.614.43.40.0

oke:RoadrunnerGasTransmission


Income
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value7.6027.7497.7428.0336.8096.4337.0037.4216.0776.3386.196.3035.5424.9584.9584.8984.8894.405
Percentage of IncomeLossFromEquityMethodInvestments29.623.322.021.126.914.417.819.717.814.614.616.015.212.312.312.212.411.1

us-gaap:IncomeLossFromEquityMethodInvestments us-gaap:StatementBusinessSegments

oke:NaturalGasGatheringAndProcessing


Income
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-31
Value0.4421.7280.262-0.042-2.1490.806-1.632-1.837-1.621-1.202-0.5380.074-0.7941.6682.2553.4333.782.632.7552.5962.5762.8154.3524.354.9224.2394.343-71.0695.0995.4867.2654.6685.2296.331
Percentage of IncomeLossFromEquityMethodInvestments1.75.20.7-0.1-8.51.8-4.1-4.9-4.8-2.8-1.30.2-2.24.25.68.69.66.67.07.48.08.613.613.516.413.712.7135.820.016.323.617.019.824.5

oke:NaturalGasLiquids


Income
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-31
Value5.093.6048.8558.0187.797151515151717161616151515131313131311109.6936.98134.3514.4594.7646.5956.3365.9123.135
Percentage of IncomeLossFromEquityMethodInvestments19.810.825.121.130.834.239.942.346.840.341.841.845.340.939.238.238.334.733.939.743.040.634.633.832.322.640.1-8.317.514.221.423.122.412.1

oke:NaturalGasPipelines


Income
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-31
Value20272630192825231927252220222221202323181516161615191614152316161516
Percentage of IncomeLossFromEquityMethodInvestments78.584.074.179.077.764.064.262.657.962.459.558.056.855.055.253.352.158.759.152.949.150.951.852.751.363.747.2-27.562.469.555.059.957.863.4

oke:TotalSegments


Income
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-31
Value25333538254439373443423936404040393939353232
Percentage of IncomeLossFromEquityMethodInvestments100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:IncreaseDecreaseInDerivativeAssetsAndLiabilities

us-gaap:IncreaseDecreaseInDerivativeAssetsAndLiabilities


Increase
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-31
Value-139.625-19.302-324.001-3.1816078-6.97699-2.041-4.362-50.7515.614-38.193-34.387-3.08332-20.963-45.97729-11.3213623-12.87-20.9085.27760-31.615-8.883-8.275-10.766
Percentage of IncreaseDecreaseInDerivativeAssetsAndLiabilities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:IncreaseDecreaseInInterestPayableNet

us-gaap:IncreaseDecreaseInInterestPayableNet


Increase
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-31
Value-104.872104-76.8795-68.91868-44.79753-47.8149-37.78438-14.67421-22.3638.377-15.63715-24.41320-6.62911-1.1182.039-2.2612.268-6.397-1.48519-16.13114
Percentage of IncreaseDecreaseInInterestPayableNet100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:IncreaseDecreaseInReceivables

us-gaap:IncreaseDecreaseInReceivables


Increase
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value18385112108113-334.3711949-143.58-6.089-266.11715090-358.73329715614-137.58614059153-68.3260.691-98.62275-134.3-224.958-139.051-130.284112-372.186-8.2569990365190-360.64-180.413-138.77-14.48115553-474.67235295235
Percentage of IncreaseDecreaseInReceivables100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:InterestCostsCapitalized

us-gaap:InterestCostsCapitalized


Interest
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-30
Value5.4435.0951313163033272619128.3265.1342.0381.2561.0681.7451.4411.3263.8062.5722.887108.8519.9277.23131411151814111212119.78.977115.9674.2
Percentage of InterestCostsCapitalized100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:NetIncomeLossAttributableToParentDiluted

us-gaap:NetIncomeLossAttributableToParentDiluted


Net
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-30
Value341385307312134-142.13231930831133629231228026462165718790928684278676609364699190620.91911211165601081126055129815541
Percentage of NetIncomeLossAttributableToParentDiluted100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OperatingLeasePayments

us-gaap:OperatingLeasePayments


Operating
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-31
Value3.5833.5123.312.841.2411.6721.7811.519
Percentage of OperatingLeasePayments100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OtherComprehensiveIncomeLossCashFlowHedgeGainLossBeforeReclassificationAfterTax

us-gaap:OtherComprehensiveIncomeLossCashFlowHedgeGainLossBeforeReclassificationAfterTax


Other
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-30
Value-173.054323.398-15.75-46.53-106.14151-73.822
Percentage of OtherComprehensiveIncomeLossCashFlowHedgeGainLossBeforeReclassificationAfterTax100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OtherComprehensiveIncomeLossCashFlowHedgeGainLossBeforeReclassificationTax

us-gaap:OtherComprehensiveIncomeLossCashFlowHedgeGainLossBeforeReclassificationTax


Other
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-30
Value-51692000.09857000.01015000.0-4704000.0-13898000.0-31705000.015530000.0-22050000.0
Percentage of OtherComprehensiveIncomeLossCashFlowHedgeGainLossBeforeReclassificationTax100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OtherComprehensiveIncomeLossCashFlowHedgeGainLossReclassificationAfterTax

us-gaap:OtherComprehensiveIncomeLossCashFlowHedgeGainLossReclassificationAfterTax


Other
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-30
Value-35.204-41.387-9.887-5.361-21.01315-8.6918.952
Percentage of OtherComprehensiveIncomeLossCashFlowHedgeGainLossReclassificationAfterTax100.0100.0100.0100.0100.0100.0100.0100.0

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

us-gaap:OtherComprehensiveIncomeLossCashFlowHedgeGainLossReclassificationBeforeTax

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


Other
Period End2021-06-302020-06-30
Value49-14.45
Percentage of OtherComprehensiveIncomeLossCashFlowHedgeGainLossReclassificationBeforeTax100.0100.0

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


Other
Period End2021-06-302020-06-30
Value-85.16253
Percentage of OtherComprehensiveIncomeLossCashFlowHedgeGainLossReclassificationBeforeTax-172.5-367.7

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


Other
Period End2021-06-302020-06-30
Value-9.915-64.541
Percentage of OtherComprehensiveIncomeLossCashFlowHedgeGainLossReclassificationBeforeTax-20.1446.7

us-gaap:OtherComprehensiveIncomeLossCashFlowHedgeGainLossReclassificationBeforeTax us-gaap:DerivativeInstrumentsGainLossByHedgingRelationship

us-gaap:CashFlowHedging


Other
Period End2021-06-302020-06-30
Value-45.72-25.853
Percentage of OtherComprehensiveIncomeLossCashFlowHedgeGainLossReclassificationBeforeTax-92.6178.9

us-gaap:OtherComprehensiveIncomeLossCashFlowHedgeGainLossReclassificationTax

us-gaap:OtherComprehensiveIncomeLossCashFlowHedgeGainLossReclassificationTax


Other
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-30
Value-10516000.0-12361000.0-2953000.0-3038000.0-4840000.04518000.0-2596000.02673000.0
Percentage of OtherComprehensiveIncomeLossCashFlowHedgeGainLossReclassificationTax100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OtherComprehensiveIncomeLossDerivativesQualifyingAsHedgesNetOfTax

us-gaap:OtherComprehensiveIncomeLossDerivativesQualifyingAsHedgesNetOfTax


Other
Period End2021-06-302021-03-312020-12-31
Value-137.857413
Percentage of OtherComprehensiveIncomeLossDerivativesQualifyingAsHedgesNetOfTax100.0100.0100.0

us-gaap:OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent

us-gaap:OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent


Other
Period End2021-06-302021-03-31
Value-135.84785
Percentage of OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent100.0100.0

us-gaap:OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentBeforeReclassificationAdjustmentsNetOfTax

us-gaap:OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentBeforeReclassificationAdjustmentsNetOfTax


Other
Period End2021-06-302021-03-312020-12-31
Value-0.0250.16740
Percentage of OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentBeforeReclassificationAdjustmentsNetOfTax100.0100.0100.0

us-gaap:OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentNetOfTax

us-gaap:OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentNetOfTax


Other
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-31
Value-5.247-3.63836-3.562-3.561-3.56216-2.465-2.465-2.3414.315-3.236-3.235-2.61510-2.041-2.04-2.04121-1.553-1.552-1.553-8.096-2.441-2.441-2.43831-2.185-2.033-3.851-104.7637.2936.8827.462-6.2695.7785.7775.777
Percentage of OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentNetOfTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansTax

us-gaap:OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansTax


Other
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-31
Value-1.567-1.08711-1.064-1.064-1.0645.082-0.737-0.736-0.6991.289-0.966-0.967-0.7813.203-1.36-1.361-1.3614-1.035-1.035-1.035-5.48-1.599-1.6-1.59921-1.456-1.356-2.567-38.785-4.603-4.344.70817-3.644-3.6443.644
Percentage of OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetGainLossTax

us-gaap:OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetGainLossTax


Other
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-31
Value1600000.0-1100000.0-1000000.0-1100000.01000000.01100000.0-700000.0-700000.0800000.0700000.0
Percentage of OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetGainLossTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansNetOfTax

us-gaap:OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansNetOfTax


Other
Period End2021-06-302021-03-312020-12-31
Value5.2223.8053.561
Percentage of OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansNetOfTax100.0100.0100.0

us-gaap:OtherCostAndExpenseOperating

us-gaap:OtherCostAndExpenseOperating


Other
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-30
Value212207222173190175231218206207213206202181194182190162179165
Percentage of OtherCostAndExpenseOperating100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OtherNonoperatingExpense

us-gaap:OtherNonoperatingExpense


Other
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value7.4985.2374.4064.4966.1763.9953.9796.0654.4973.4623.8243.4044.3913.3091.5050.838210.751.7710.710.9410.637-2.9947.5081.961.3041.2462.5061.39225131.0770.8062.5960.9350.9194.8982.274-4.235130.7732.2875.7642.0977.5521.053
Percentage of OtherNonoperatingExpense100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OtherNonoperatingIncome

us-gaap:OtherNonoperatingIncome


Other
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value7.0050.2159.3558.175178.5225.3736.6435.6829.36-6.9935.0721.8570.7383.7153.2964.0334.341-3.264.2424.8040.3050.1190.0710.063.1362.4810.13.2131.4097.8316.1543.1347.3641.0095.0490.6869.8610.3830.1240.3413.3696.6246.710.7112.909
Percentage of OtherNonoperatingIncome100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OtherOperatingActivitiesCashFlowStatement

us-gaap:OtherOperatingActivitiesCashFlowStatement


Other
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-30
Value2811528.3454.436-30.382.76716-1.267-16.1443.1180.00.00.00.0-1.609-0.389-1.431-2.22729-0.4620.052-1.36-0.211-0.247-0.68-0.3330.30.437
Percentage of OtherOperatingActivitiesCashFlowStatement100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.00.00.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:PaymentsForProceedsFromOtherInvestingActivities

us-gaap:PaymentsForProceedsFromOtherInvestingActivities


Payments
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312016-12-312016-09-302015-12-312015-09-302014-12-312014-09-302013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-31
Value7.994.14826516.9442223-1.7290.495-11.349-0.5250.00.00.00.00.00.00.00.00.00.0-1.249-0.046-0.918-0.024-4.00.00.00.05.936
Percentage of PaymentsForProceedsFromOtherInvestingActivities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.00.00.00.00.00.00.00.00.00.0100.0100.0100.0100.0100.00.00.00.0100.0

us-gaap:PaymentsOfFinancingCosts

us-gaap:PaymentsOfFinancingCosts


Payments
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value-0.0770.01215-0.03170.251112.14110.00.00.085110.0380.00.00.00.02.770.3899.2760.07.850.0-9.6630.09.6630.029100.00.00.0069.6350.0035.3920.00.00.0100.00.00.00.0
Percentage of PaymentsOfFinancingCosts100.00.0100.0100.0100.0100.0100.0100.0100.0100.00.00.0100.0100.0100.00.00.00.00.0100.0100.0100.00.0100.00.0100.00.0100.0100.0100.00.00.0100.0100.0100.0100.00.00.00.0100.00.00.00.00.0

us-gaap:PreferredStockDividendRatePercentage us-gaap:StatementClassOfStock

us-gaap:PreferredStockDividendRatePercentage

us-gaap:SeriesEPreferredStock


Preferred
Period End2021-06-302021-03-312020-12-31
Value05.50
Percentage of PreferredStockDividendRatePercentage0.0100.00.0

us-gaap:ProceedsFromEquityMethodInvestmentDividendsOrDistributionsReturnOfCapital

us-gaap:ProceedsFromEquityMethodInvestmentDividendsOrDistributionsReturnOfCapital


Proceeds
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-31
Value1.504109.5284.199116.949114.92263137.1446.0254.8678.7217.1656.6417.5367.49.0266.64524118.8046.2978.869.954-3.8188.476114.7256.2436.933116.6989.54311104.062
Percentage of ProceedsFromEquityMethodInvestmentDividendsOrDistributionsReturnOfCapital100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ProceedsFromIssuanceOfCommonStock

us-gaap:ProceedsFromIssuanceOfCommonStock


Proceeds
Period End2020-12-312020-09-302019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value105.239.7075.1759.3744.7848.8538.414.6011182425357.1233.7227.0233.8477.1373.9646.833.5416.5023.7966.2423.7426.1463.02122.5363.1712.8318.9012.4772.3632.228102.222-0.1045.024111.4733.2214.663
Percentage of ProceedsFromIssuanceOfCommonStock100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ProceedsFromPaymentsForOtherFinancingActivities

us-gaap:ProceedsFromPaymentsForOtherFinancingActivities


Proceeds
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312012-03-312011-03-31
Value-6.006-11.988-0.565-0.583-6.576-20.978-0.977-3.678-1.41-52.725-0.501-0.7865.817-7.011-0.058-0.293-0.09-13.3957.130.01.189-1.1890.0-0.048
Percentage of ProceedsFromPaymentsForOtherFinancingActivities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0100.0100.00.0100.0

us-gaap:PublicUtilitiesAllowanceForFundsUsedDuringConstructionCapitalizedCostOfEquity

us-gaap:PublicUtilitiesAllowanceForFundsUsedDuringConstructionCapitalizedCostOfEquity


Public
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-30
Value0.4260.8121.3153.0843.85415191516124.6342.2940.8040.230.0320.040.0220.0130.0010.00.00.2080.4610.1770.7420.7990.991.7231.253109.356.4295.6569.0877.5223.3021.8490.9750.710.7590.40.4660.270.2660.235
Percentage of PublicUtilitiesAllowanceForFundsUsedDuringConstructionCapitalizedCostOfEquity100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:RelatedPartyTransactionExpensesFromTransactionsWithRelatedParty dei:LegalEntity

us-gaap:RelatedPartyTransactionExpensesFromTransactionsWithRelatedParty

oke:UnconsolidatedAffiliates


Related
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-30
Value1215273541454041404140373837403939363536343330282519181514141715127.88.89.08.9
Percentage of RelatedPartyTransactionExpensesFromTransactionsWithRelatedParty100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:RepaymentsOfDebt

us-gaap:RepaymentsOfDebt


Repayments
Period End2021-03-312020-09-302020-06-30
Value5425101
Percentage of RepaymentsOfDebt100.0100.0100.0

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

oke:GuardianPipeline, oke:NotesPayables1Due2022


Repayments
Period End2021-06-30
Value11
Percentage of RepaymentsOfDebt0.0

us-gaap:RightOfUseAssetObtainedInExchangeForOperatingLeaseLiability

us-gaap:RightOfUseAssetObtainedInExchangeForOperatingLeaseLiability


Right
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-31
Value0.351.0630.795970.4340.6222.6610.38
Percentage of RightOfUseAssetObtainedInExchangeForOperatingLeaseLiability100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:StockIssuedDuringPeriodValueOther

us-gaap:StockIssuedDuringPeriodValueOther


Stock
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-30
Value146.6775.7899497.0897.075116.269.2399.4297.0851182392698.233.2017.0374.0179.7865.676105.5628.553.85.3665.7576.3257.579144.1424.9192.831113.8383.9912.561269.84114
Percentage of StockIssuedDuringPeriodValueOther100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:StockIssuedDuringPeriodValueOther us-gaap:StatementEquityComponents

us-gaap:AdditionalPaidInCapital


Stock
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-30
Value7.115-10.1590.803939-9.2864.2386.335-24.7794.8184.7214.5351169388663.705-2.5062.8621.5031.645-3.679-1.266-1.9843.051-7.3512.090.8232.926-24.1465.5032.1372.303-26.4923.21.2251.348-29.177148.045
Percentage of StockIssuedDuringPeriodValueOther49.7-152.113.998.9-131.059.954.0-395.852.150.164.098.998.996.445.0-78.340.737.416.8-64.8-12.2-35.735.7-193.438.914.346.3-318.638.551.646.8-935.827.231.933.8-1139.353.481.7

us-gaap:TreasuryStock


Stock
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-30
Value7.208164.98610162.8375.391314.4214.7082.55134.2182.5144.5255.7074.1752.5148.1419.355117.5465.499113.2764.9343.399318.7942.0052.616298.5562.6132.64331121.796
Percentage of StockIssuedDuringPeriodValueOther50.3252.186.11.1231.040.146.0495.847.949.936.01.11.13.655.0178.359.362.683.2164.8112.2135.764.3293.461.185.753.7418.661.548.453.21035.872.868.166.21239.346.618.3

us-gaap:StockholdersEquityOther

us-gaap:StockholdersEquityOther


Stockholders
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-09-302011-06-302011-03-312010-12-312010-09-30
Value9.71-7.7298.7988.652-17.957.3637.004-45.074-11.1086.0836.77810-5.305-6.142-6.474-0.261-6.403-5.406-8.7165.466-5.2641.631-5.1054.226-6.5020.432-7.50443-21.174-42.234-8.175-33.427-15.5479.6168.596-20.6480.00.00.00.0-0.028
Percentage of StockholdersEquityOther100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.00.00.00.0100.0

us-gaap:StockholdersEquityOther us-gaap:StatementEquityComponents

us-gaap:AdditionalPaidInCapital


Stockholders
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-31
Value9.71-7.7298.7988.652-17.957.3637.004-45.074-11.1086.0836.77810-5.275-5.927-6.329-0.261-6.404-5.406-8.7161.425-5.3621.154-5.0664.327-6.5020.432-7.50443-21.174-42.23458-33.427-15.5479.6168.596-20.648
Percentage of StockholdersEquityOther100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.099.496.597.8100.0100.0100.0100.026.1101.970.899.2102.4100.0100.0100.0100.0100.0100.0-717.8100.0100.0100.0100.0100.0

us-gaap:TaxesExcludingIncomeAndExciseTaxes

us-gaap:TaxesExcludingIncomeAndExciseTaxes


Taxes
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-30
Value41442731343127263033222428292224242724182421211724241519182224273019212327
Percentage of TaxesExcludingIncomeAndExciseTaxes100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:WeightedAverageNumberDilutedSharesOutstandingAdjustment

us-gaap:WeightedAverageNumberDilutedSharesOutstandingAdjustment


Weighted
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-312017-09-302017-06-302017-03-312016-09-302016-06-302016-03-312015-09-302015-06-302015-03-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-312012-09-302012-06-302012-03-312011-09-302011-06-302011-03-312010-09-302010-06-30
Value566000.0991000.0407000.0394000.01066000.01762000.01443000.02325000.02730000.02695000.02497000.02512000.02227000.01983000.01561000.01543000.0290000.0228000.0273000.0593000.01270000.01113000.01036000.03658000.02731000.03979000.04955000.04492.02117.02667.02693.02159.01208.01482.0
Percentage of WeightedAverageNumberDilutedSharesOutstandingAdjustment100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

oke:AccumulatedOtherComprehensiveIncomeLossCumulativeChangeinOtherComprehensiveIncomeLossfromEquityMethodInvestmentsEffectNetofTax

oke:AccumulatedOtherComprehensiveIncomeLossCumulativeChangeinOtherComprehensiveIncomeLossfromEquityMethodInvestmentsEffectNetofTax


Accumulated
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-06-302016-03-312015-12-312014-12-31
Value-11782000.0-8538000.0-16368000.0-19091000.0-20203000.0-16642000.0-8999000.0-12387000.0-7988000.0-4305000.0-1794000.04077000.02597000.01620000.0-1204000.0-1448000.0-1279000.0-861000.0-959000.0-3450000.0-2007000.0-500000.00
Percentage of AccumulatedOtherComprehensiveIncomeLossCumulativeChangeinOtherComprehensiveIncomeLossfromEquityMethodInvestmentsEffectNetofTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0

oke:AmountOfAccumulatedOtherComprehensiveIncomeLossAttributablePrimarilyToSettledInterestRateSwaps us-gaap:DerivativeInstrumentRisk, us-gaap:DerivativeInstrumentsGainLossByHedgingRelationship

oke:AmountOfAccumulatedOtherComprehensiveIncomeLossAttributablePrimarilyToSettledInterestRateSwaps

us-gaap:InterestRateContract, us-gaap:CashFlowHedging


Amount
Period End2021-06-302021-03-312020-12-312020-09-30
Value-178440000.0-186080000.0-193520000.0-201110000.0
Percentage of AmountOfAccumulatedOtherComprehensiveIncomeLossAttributablePrimarilyToSettledInterestRateSwaps100.0100.0100.0100.0

oke:Amountofaccumulatedothercomprehensiveincomelossattributableprimarilytoforwardstartinginterestrateswaps. us-gaap:DerivativeInstrumentRisk, us-gaap:DerivativeInstrumentsGainLossByHedgingRelationship

oke:Amountofaccumulatedothercomprehensiveincomelossattributableprimarilytoforwardstartinginterestrateswaps.

us-gaap:InterestRateContract, us-gaap:CashFlowHedging


Amountofaccumulatedothercomprehensiveincomelossattributableprimarilytoforwardstartinginterestrateswaps.us-gaap:
Period End2021-06-302021-03-312020-12-312020-09-30
Value-112720000.0-74784000.0-156620000.0-178630000.0
Percentage of Amountofaccumulatedothercomprehensiveincomelossattributableprimarilytoforwardstartinginterestrateswaps.100.0100.0100.0100.0

oke:CommodityCashFlowHedgeGainLossToBeReclassifiedAfterNext12MonthsNet us-gaap:DerivativeInstrumentRisk, us-gaap:DerivativeInstrumentsGainLossByHedgingRelationship

oke:CommodityCashFlowHedgeGainLossToBeReclassifiedAfterNext12MonthsNet

us-gaap:CommodityContract, us-gaap:CashFlowHedging


Commodity
Period End2021-06-302021-03-312020-12-312020-09-30
Value-7000000.05500000.0-300000.0-2600000.0
Percentage of CommodityCashFlowHedgeGainLossToBeReclassifiedAfterNext12MonthsNet100.0100.0100.0100.0

oke:CommodityExchangesAndImbalances

oke:CommodityExchangesAndImbalances


Commodity
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312009-12-31
Value141611131713251926382922263838111393060383838303139647493828275905737163631051317494186
Percentage of CommodityExchangesAndImbalances100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

oke:CommodityExchangesAndImbalancesLiabilitiesCurrent

oke:CommodityExchangesAndImbalancesLiabilitiesCurrent


Commodity
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302010-12-31
Value244209186125108551041031001201101621361241641891141141421057774969194104171207216212227199201272213201201202236313288
Percentage of CommodityExchangesAndImbalancesLiabilitiesCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

oke:DerivativeCollateralRighttoReclaimCashTotal

oke:DerivativeCollateralRighttoReclaimCashTotal


Derivative
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-31
Value2271086348130.08.81.90.6200.86752184952113067
Percentage of DerivativeCollateralRighttoReclaimCashTotal100.0100.0100.0100.0100.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

oke:EmployeeParticipationInPlanInHundredths us-gaap:AwardType

oke:EmployeeParticipationInPlanInHundredths

oke:EmployeeStockPurchasePlan


Employee
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-31
Value68.00.620.60.580.570.530.670.520.550.56
Percentage of EmployeeParticipationInPlanInHundredths100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

oke:ForfeitureRateMaximumInHundredths

oke:ForfeitureRateMaximumInHundredths


Forfeiture
Period End2020-12-31
Value3.0
Percentage of ForfeitureRateMaximumInHundredths100.0

oke:IndebtednessToAdjustedEBITDAFromAcquisitionsMaximum us-gaap:LineOfCreditFacility, us-gaap:SubsequentEventType

oke:IndebtednessToAdjustedEBITDAFromAcquisitionsMaximum

oke:A2.5BillionCreditAgreement, us-gaap:SubsequentEvent


Indebtedness
Period End2020-12-31
Value5.5
Percentage of IndebtednessToAdjustedEBITDAFromAcquisitionsMaximum100.0

oke:IndebtednessToAdjustedEbitdaCurrent us-gaap:LineOfCreditFacility

oke:IndebtednessToAdjustedEbitdaCurrent

oke:A2.5BillionCreditAgreement


Indebtedness
Period End2021-06-302021-03-312020-12-312020-09-30
Value4.44.64.64.6
Percentage of IndebtednessToAdjustedEbitdaCurrent100.0100.0100.0100.0

oke:LeaseLiabilities oke:LeaseDescription

oke:LeaseLiabilities

oke:LeaseAssetsandLiabilitiesIncludedintheConsolidatedBalanceSheet


Lease
Period End2020-12-312019-12-31
Value12541
Percentage of LeaseLiabilities100.0100.0

oke:LeasedAssets oke:LeaseDescription

oke:LeasedAssets

oke:LeaseAssetsandLiabilitiesIncludedintheConsolidatedBalanceSheet


Leased
Period End2020-12-312019-12-31
Value12542
Percentage of LeasedAssets100.0100.0

oke:LineOfCreditFacilityOptionToIncreaseBorrowingCapacity us-gaap:LineOfCreditFacility

oke:LineOfCreditFacilityOptionToIncreaseBorrowingCapacity

oke:A2.5BillionCreditAgreement


Line
Period End2020-12-31
Value3500
Percentage of LineOfCreditFacilityOptionToIncreaseBorrowingCapacity100.0

oke:LineOfCreditFacilitySublimit us-gaap:LineOfCreditFacility

oke:LineOfCreditFacilitySublimit

oke:A2.5BillionCreditAgreement


Line
Period End2020-12-31
Value100
Percentage of LineOfCreditFacilitySublimit100.0

oke:LineofCreditFacilitySwinglineSubfacility us-gaap:LineOfCreditFacility

oke:LineofCreditFacilitySwinglineSubfacility

oke:A2.5BillionCreditAgreement


Lineof
Period End2020-12-31
Value200
Percentage of LineofCreditFacilitySwinglineSubfacility100.0

oke:MaximumAllowablePercentageOfAnnualBasePayWithheldToPurchaseOurCommonStock us-gaap:AwardType

oke:MaximumAllowablePercentageOfAnnualBasePayWithheldToPurchaseOurCommonStock

oke:EmployeeStockPurchasePlan


Maximum
Period End2020-12-31
Value10.0
Percentage of MaximumAllowablePercentageOfAnnualBasePayWithheldToPurchaseOurCommonStock100.0

oke:NetProceedsFromExitOfAnInvestmentInAnInsuranceContract us-gaap:DefinedBenefitPlanByPlanAssetCategories, us-gaap:RetirementPlanType

oke:NetProceedsFromExitOfAnInvestmentInAnInsuranceContract

oke:InsuranceContracts, us-gaap:OtherPostretirementBenefitPlansDefinedBenefit


Net
Period End2020-12-31
Value16
Percentage of NetProceedsFromExitOfAnInvestmentInAnInsuranceContract100.0

oke:PurchasePricePercentageOfLowerOfItsGrantDateOrExerciseDateMarketPriceInHundredths us-gaap:AwardType

oke:PurchasePricePercentageOfLowerOfItsGrantDateOrExerciseDateMarketPriceInHundredths

oke:EmployeeStockPurchasePlan


Purchase
Period End2020-12-31
Value85.0
Percentage of PurchasePricePercentageOfLowerOfItsGrantDateOrExerciseDateMarketPriceInHundredths100.0

oke:SeniorNoteCovenantAccelerationOfIndebtedness us-gaap:ConsolidatedEntities, us-gaap:DebtInstrument

oke:SeniorNoteCovenantAccelerationOfIndebtedness

srt:ParentCompany, oke:A6.875NotesPayabledue2028


Senior
Period End2020-12-31
Value15
Percentage of SeniorNoteCovenantAccelerationOfIndebtedness100.0

oke:SeniorNoteCovenantRedemptionPriceUponEventOfDefault us-gaap:ConsolidatedEntities, us-gaap:DebtInstrument

oke:SeniorNoteCovenantRedemptionPriceUponEventOfDefault

srt:ParentCompany, oke:A7.5NotesPayabledue2023


Senior
Period End2020-12-31
Value101.0
Percentage of SeniorNoteCovenantRedemptionPriceUponEventOfDefault100.0

oke:SeniorNoteCovenantTrusteeOrHoldersPercentageRequiredUponEventOfDefault

oke:SeniorNoteCovenantTrusteeOrHoldersPercentageRequiredUponEventOfDefault


Senior
Period End2020-12-31
Value25.0
Percentage of SeniorNoteCovenantTrusteeOrHoldersPercentageRequiredUponEventOfDefault100.0

oke:UnamortizedPortionofTerminatedSwaps

oke:UnamortizedPortionofTerminatedSwaps


Unamortized
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-06-302015-12-31
Value121213131414151515161617171818181919202121
Percentage of UnamortizedPortionofTerminatedSwaps100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

oke:UnrealizedGainLossOnCashFlowHedgesNetOfTaxAccumulatedOtherComprehensiveIncomeLoss us-gaap:DerivativeInstrumentRisk, us-gaap:DerivativeInstrumentsGainLossByHedgingRelationship

oke:UnrealizedGainLossOnCashFlowHedgesNetOfTaxAccumulatedOtherComprehensiveIncomeLoss

us-gaap:CommodityContract, us-gaap:CashFlowHedging


Unrealized
Period End2021-06-302021-03-312020-12-312020-09-30
Value-149750000.0-42201000.0-27303000.0-10988000.0
Percentage of UnrealizedGainLossOnCashFlowHedgesNetOfTaxAccumulatedOtherComprehensiveIncomeLoss100.0100.0100.0100.0

oke:UnrecordedPurchaseObligationDueAfterFiveYears

oke:UnrecordedPurchaseObligationDueAfterFiveYears


Unrecorded
Period End2020-12-31
Value227
Percentage of UnrecordedPurchaseObligationDueAfterFiveYears100.0

oke:UnrecordedPurchaseObligationDueCurrent

oke:UnrecordedPurchaseObligationDueCurrent


Unrecorded
Period End2020-12-31
Value70
Percentage of UnrecordedPurchaseObligationDueCurrent100.0

oke:UnrecordedPurchaseObligationDueInFourYears

oke:UnrecordedPurchaseObligationDueInFourYears


Unrecorded
Period End2020-12-31
Value53
Percentage of UnrecordedPurchaseObligationDueInFourYears100.0

oke:UnrecordedPurchaseObligationDueInThreeYears

oke:UnrecordedPurchaseObligationDueInThreeYears


Unrecorded
Period End2020-12-31
Value55
Percentage of UnrecordedPurchaseObligationDueInThreeYears100.0

oke:UnrecordedPurchaseObligationDueInTwoYears

oke:UnrecordedPurchaseObligationDueInTwoYears


Unrecorded
Period End2020-12-31
Value60
Percentage of UnrecordedPurchaseObligationDueInTwoYears100.0

oke:UnrecordedPurchaseObligationTotal

oke:UnrecordedPurchaseObligationTotal


Unrecorded
Period End2020-12-31
Value516
Percentage of UnrecordedPurchaseObligationTotal100.0

oke:Unrecordedpurchaseobligationdueinfiveyears

oke:Unrecordedpurchaseobligationdueinfiveyears


Unrecordedpurchaseobligationdueinfiveyears
Period End2020-12-31
Value47
Percentage of Unrecordedpurchaseobligationdueinfiveyears100.0

us-gaap:AccountsPayableRelatedPartiesCurrent

us-gaap:AccountsPayableRelatedPartiesCurrent


Accounts
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312013-12-31
Value5.28.4139.714131313141412121213131213111112118.09.4107.4206.9
Percentage of AccountsPayableRelatedPartiesCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:AccumulatedOtherComprehensiveIncomeLossCumulativeChangesInNetGainLossFromCashFlowHedgesEffectNetOfTax

us-gaap:AccumulatedOtherComprehensiveIncomeLossCumulativeChangesInNetGainLossFromCashFlowHedgesEffectNetOfTax


Accumulated
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302010-12-312009-12-31
Value-440.911-303.061-377.446-390.731-380.342-354.825-233.52-294.203-211.429-145.775-64.66-45.724-61.459-53.35-81.915-85.209-77.651-39.006-52.155-70.833-74.358-49.617-42.699-43.473-40.254-42.371-37.349-40.289-43.468-38.258-43.168-35.853-36.064-53.861-55.03-72.602-43.452-22.538-55.367-35.6532.7615-6.151
Percentage of AccumulatedOtherComprehensiveIncomeLossCumulativeChangesInNetGainLossFromCashFlowHedgesEffectNetOfTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:AccumulatedOtherComprehensiveIncomeLossDefinedBenefitPensionAndOtherPostretirementPlansNetOfTax

us-gaap:AccumulatedOtherComprehensiveIncomeLossDefinedBenefitPensionAndOtherPostretirementPlansNetOfTax


Accumulated
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302010-12-312009-12-31
Value148153157120124127131114116119121116119122105959799101798182849295979968707279184177170162169-163.295-157.518-151.741139135125-113.903
Percentage of AccumulatedOtherComprehensiveIncomeLossDefinedBenefitPensionAndOtherPostretirementPlansNetOfTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:AccumulatedOtherComprehensiveIncomeLossDefinedBenefitPensionAndOtherPostretirementPlansNetOfTax us-gaap:RetirementPlanType

us-gaap:OtherPostretirementBenefitPlansDefinedBenefit


Accumulated
Period End2020-12-312019-12-312018-12-312017-12-312016-12-31
Value192.7213.3146.7046.475
Percentage of AccumulatedOtherComprehensiveIncomeLossDefinedBenefitPensionAndOtherPostretirementPlansNetOfTax12.22.12.76.46.4

us-gaap:PensionPlansDefinedBenefit


Accumulated
Period End2020-12-312019-12-312018-12-312017-12-312016-12-31
Value1361271169894
Percentage of AccumulatedOtherComprehensiveIncomeLossDefinedBenefitPensionAndOtherPostretirementPlansNetOfTax86.896.796.093.693.6

us-gaap:ContractWithCustomerLiability

us-gaap:ContractWithCustomerLiability


Contract
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312018-01-01
Value523341465045574550313138422.12e-053.3299999999999996e-05
Percentage of ContractWithCustomerLiability100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ContractWithCustomerLiabilityNoncurrent

us-gaap:ContractWithCustomerLiabilityNoncurrent


Contract
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-31
Value1617171819333420202016
Percentage of ContractWithCustomerLiabilityNoncurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DebtInstrumentCarryingAmount

us-gaap:DebtInstrumentCarryingAmount


Debt
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312014-12-312013-12-312012-12-312011-12-31
Value1429214304143611438514415142741281312595111471039994519023823680829198951896499667948988308832883484867194775665144875
Percentage of DebtInstrumentCarryingAmount100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

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

us-gaap:DebtInstrumentFaceAmount

srt:ParentCompany, oke:A5.2NotesPayabledue2048


Debt
Period End2021-06-302021-03-312020-12-312020-09-302018-09-30
Value1000100010001000450
Percentage of DebtInstrumentFaceAmount100.0100.0100.0100.0100.0

us-gaap:DebtInstrumentUnamortizedDiscountPremiumAndDebtIssuanceCostsNet

us-gaap:DebtInstrumentUnamortizedDiscountPremiumAndDebtIssuanceCostsNet


Debt
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302015-12-31
Value131134138142145135121123101103878773757880636668707274
Percentage of DebtInstrumentUnamortizedDiscountPremiumAndDebtIssuanceCostsNet100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DeferredIncomeTaxLiabilities

us-gaap:DeferredIncomeTaxLiabilities


Deferred
Period End2020-12-312019-12-312018-12-312017-12-31
Value25241667801141
Percentage of DeferredIncomeTaxLiabilities100.0100.0100.0100.0

us-gaap:DeferredTaxAssetsGross

us-gaap:DeferredTaxAssetsGross


Deferred
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-312010-12-31
Value19761225655361219252236275302302188
Percentage of DeferredTaxAssetsGross100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DeferredTaxAssetsOperatingLossCarryforwards

us-gaap:DeferredTaxAssetsOperatingLossCarryforwards


Deferred
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-31
Value1473858420159267680120.0
Percentage of DeferredTaxAssetsOperatingLossCarryforwards100.0100.0100.0100.0100.0100.0100.0100.00.0

us-gaap:DeferredTaxAssetsOperatingLossCarryforwardsStateAndLocal

us-gaap:DeferredTaxAssetsOperatingLossCarryforwardsStateAndLocal


Deferred
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-31
Value258171108733939383831
Percentage of DeferredTaxAssetsOperatingLossCarryforwardsStateAndLocal100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DeferredTaxAssetsOther

us-gaap:DeferredTaxAssetsOther


Deferred
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-312010-12-31
Value121213132.425121320333125
Percentage of DeferredTaxAssetsOther100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DeferredTaxAssetsOtherComprehensiveLoss

us-gaap:DeferredTaxAssetsOtherComprehensiveLoss


Deferred
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-312010-12-31
Value1348322303226227814013473
Percentage of DeferredTaxAssetsOtherComprehensiveLoss100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsEmployeeBenefits

us-gaap:DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsEmployeeBenefits


Deferred
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-312010-12-31
Value9699918511897817812813689
Percentage of DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsEmployeeBenefits100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsPensions us-gaap:RetirementPlanType

us-gaap:DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsPensions

us-gaap:OtherPostretirementBenefitPlansDefinedBenefit


Deferred
Period End2020-12-312019-12-312018-12-312017-12-312016-12-31
Value-6322000.0-1389000.0-1567000.0-4398000.0-4316000.0
Percentage of DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsPensions100.0100.0100.0100.0100.0

us-gaap:PensionPlansDefinedBenefit


Deferred
Period End2020-12-312019-12-312018-12-312017-12-312016-12-31
Value-49251000.0-46354000.0-43286000.0-62214000.0-63174000.0
Percentage of DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsPensions779.03337.22762.31414.61463.7

us-gaap:DeferredTaxLiabilitiesInvestmentInNoncontrolledAffiliates

us-gaap:DeferredTaxLiabilitiesInvestmentInNoncontrolledAffiliates


Deferred
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-312010-12-31
Value24371582728771726158514661217969851729
Percentage of DeferredTaxLiabilitiesInvestmentInNoncontrolledAffiliates100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DeferredTaxLiabilitiesPropertyPlantAndEquipment

us-gaap:DeferredTaxLiabilitiesPropertyPlantAndEquipment


Deferred
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-312010-12-31
Value878473641079389822760664519
Percentage of DeferredTaxLiabilitiesPropertyPlantAndEquipment100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DefinedBenefitPlanAccumulatedBenefitObligation us-gaap:RetirementPlanType

us-gaap:DefinedBenefitPlanAccumulatedBenefitObligation

us-gaap:PensionPlansDefinedBenefit


Defined
Period End2020-12-312019-12-312018-12-312017-12-312016-12-31
Value548498434456407
Percentage of DefinedBenefitPlanAccumulatedBenefitObligation100.0100.0100.0100.0100.0

us-gaap:DefinedBenefitPlanAccumulatedOtherComprehensiveIncomeBeforeTax us-gaap:RetirementPlanType

us-gaap:DefinedBenefitPlanAccumulatedOtherComprehensiveIncomeBeforeTax

us-gaap:OtherPostretirementBenefitPlansDefinedBenefit


Defined
Period End2020-12-312019-12-312018-12-312017-12-312016-12-31
Value254.114.8811110
Percentage of DefinedBenefitPlanAccumulatedOtherComprehensiveIncomeBeforeTax100.0100.0100.0100.0100.0

us-gaap:PensionPlansDefinedBenefit


Defined
Period End2020-12-312019-12-312018-12-312017-12-312016-12-31
Value186173160160157
Percentage of DefinedBenefitPlanAccumulatedOtherComprehensiveIncomeBeforeTax728.34222.73282.41449.51463.6

us-gaap:DefinedBenefitPlanAccumulatedOtherComprehensiveIncomeNetGainsLossesBeforeTax us-gaap:RetirementPlanType

us-gaap:DefinedBenefitPlanAccumulatedOtherComprehensiveIncomeNetGainsLossesBeforeTax

us-gaap:OtherPostretirementBenefitPlansDefinedBenefit


Defined
Period End2020-12-312019-12-312018-12-312017-12-312016-12-31
Value-25.558-4.11-5.108-12.991-14.341
Percentage of DefinedBenefitPlanAccumulatedOtherComprehensiveIncomeNetGainsLossesBeforeTax100.0100.0100.0100.0100.0

us-gaap:PensionPlansDefinedBenefit


Defined
Period End2020-12-312019-12-312018-12-312017-12-312016-12-31
Value-185.662-172.952-160.212-160.921-157.935
Percentage of DefinedBenefitPlanAccumulatedOtherComprehensiveIncomeNetGainsLossesBeforeTax726.44208.13136.51238.71101.3

us-gaap:DefinedBenefitPlanAccumulatedOtherComprehensiveIncomeNetPriorServiceCostCreditBeforeTax us-gaap:RetirementPlanType

us-gaap:DefinedBenefitPlanAccumulatedOtherComprehensiveIncomeNetPriorServiceCostCreditBeforeTax

us-gaap:PensionPlansDefinedBenefit


Defined
Period End2020-12-312019-12-312018-12-312017-12-312016-12-31
Value0.4870.6010.00.00.0
Percentage of DefinedBenefitPlanAccumulatedOtherComprehensiveIncomeNetPriorServiceCostCreditBeforeTax100.0100.00.00.00.0

us-gaap:DefinedBenefitPlanAmountsRecognizedInBalanceSheet us-gaap:RetirementPlanType

us-gaap:DefinedBenefitPlanAmountsRecognizedInBalanceSheet

us-gaap:OtherPostretirementBenefitPlansDefinedBenefit


Defined
Period End2020-12-312019-12-312018-12-312017-12-312016-12-31
Value-33.641-13.249-16.04-23.805-25.273
Percentage of DefinedBenefitPlanAmountsRecognizedInBalanceSheet100.0100.0100.0100.0100.0

us-gaap:PensionPlansDefinedBenefit


Defined
Period End2020-12-312019-12-312018-12-312017-12-312016-12-31
Value-203.98-188.057-176.31-175.607-166.715
Percentage of DefinedBenefitPlanAmountsRecognizedInBalanceSheet606.31419.41099.2737.7659.7

us-gaap:SupplementalEmployeeRetirementPlanDefinedBenefit


Defined
Period End2020-12-312019-12-312018-12-31
Value1169887
Percentage of DefinedBenefitPlanAmountsRecognizedInBalanceSheet-345.4-746.5-546.8

us-gaap:DefinedBenefitPlanAssumptionsUsedCalculatingBenefitObligationDiscountRate us-gaap:RetirementPlanType

us-gaap:DefinedBenefitPlanAssumptionsUsedCalculatingBenefitObligationDiscountRate

us-gaap:OtherPostretirementBenefitPlansDefinedBenefit


Defined
Period End2020-12-312019-12-312018-12-312017-12-312016-12-31
Value2.750.0350.0450.03750.0425
Percentage of DefinedBenefitPlanAssumptionsUsedCalculatingBenefitObligationDiscountRate100.0100.0100.0100.0100.0

us-gaap:PensionPlansDefinedBenefit


Defined
Period End2020-12-312019-12-312018-12-312017-12-312016-12-31
Value3.00.0350.0450.03750.045
Percentage of DefinedBenefitPlanAssumptionsUsedCalculatingBenefitObligationDiscountRate109.1100.0100.0100.0105.9

us-gaap:DefinedBenefitPlanAssumptionsUsedCalculatingBenefitObligationRateOfCompensationIncrease us-gaap:RetirementPlanType

us-gaap:DefinedBenefitPlanAssumptionsUsedCalculatingBenefitObligationRateOfCompensationIncrease

us-gaap:PensionPlansDefinedBenefit


Defined
Period End2020-12-312019-12-312018-12-312017-12-312016-12-31
Value3.60.0370.03650.030.031
Percentage of DefinedBenefitPlanAssumptionsUsedCalculatingBenefitObligationRateOfCompensationIncrease100.0100.0100.0100.0100.0

us-gaap:DefinedBenefitPlanBenefitObligation us-gaap:RetirementPlanType

us-gaap:DefinedBenefitPlanBenefitObligation

us-gaap:OtherPostretirementBenefitPlansDefinedBenefit


Defined
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-31
Value545246575449
Percentage of DefinedBenefitPlanBenefitObligation100.0100.0100.0100.0100.0100.0

us-gaap:PensionPlansDefinedBenefit


Defined
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-31
Value583534466481428390
Percentage of DefinedBenefitPlanBenefitObligation1069.61022.5997.0831.3781.4789.3

us-gaap:DefinedBenefitPlanExpectedFutureBenefitPaymentsFiveFiscalYearsThereafter us-gaap:RetirementPlanType

us-gaap:DefinedBenefitPlanExpectedFutureBenefitPaymentsFiveFiscalYearsThereafter

us-gaap:OtherPostretirementBenefitPlansDefinedBenefit


Defined
Period End2020-12-312019-12-312018-12-312017-12-31
Value15161619
Percentage of DefinedBenefitPlanExpectedFutureBenefitPaymentsFiveFiscalYearsThereafter100.0100.0100.0100.0

us-gaap:PensionPlansDefinedBenefit


Defined
Period End2020-12-312019-12-312018-12-312017-12-31
Value127123122117
Percentage of DefinedBenefitPlanExpectedFutureBenefitPaymentsFiveFiscalYearsThereafter801.6756.5754.2606.4

us-gaap:DefinedBenefitPlanExpectedFutureBenefitPaymentsNextTwelveMonths us-gaap:RetirementPlanType

us-gaap:DefinedBenefitPlanExpectedFutureBenefitPaymentsNextTwelveMonths

us-gaap:OtherPostretirementBenefitPlansDefinedBenefit


Defined
Period End2020-12-312019-12-312018-12-312017-12-31
Value3.2973.4223.1143.452
Percentage of DefinedBenefitPlanExpectedFutureBenefitPaymentsNextTwelveMonths100.0100.0100.0100.0

us-gaap:PensionPlansDefinedBenefit


Defined
Period End2020-12-312019-12-312018-12-312017-12-31
Value19181716
Percentage of DefinedBenefitPlanExpectedFutureBenefitPaymentsNextTwelveMonths590.2534.1546.4486.6

us-gaap:DefinedBenefitPlanExpectedFutureBenefitPaymentsYearFive us-gaap:RetirementPlanType

us-gaap:DefinedBenefitPlanExpectedFutureBenefitPaymentsYearFive

us-gaap:OtherPostretirementBenefitPlansDefinedBenefit


Defined
Period End2020-12-312019-12-312018-12-312017-12-31
Value3.3223.4463.3154.023
Percentage of DefinedBenefitPlanExpectedFutureBenefitPaymentsYearFive100.0100.0100.0100.0

us-gaap:PensionPlansDefinedBenefit


Defined
Period End2020-12-312019-12-312018-12-312017-12-31
Value23222121
Percentage of DefinedBenefitPlanExpectedFutureBenefitPaymentsYearFive700.2645.0644.4525.9

us-gaap:DefinedBenefitPlanExpectedFutureBenefitPaymentsYearFour us-gaap:RetirementPlanType

us-gaap:DefinedBenefitPlanExpectedFutureBenefitPaymentsYearFour

us-gaap:OtherPostretirementBenefitPlansDefinedBenefit


Defined
Period End2020-12-312019-12-312018-12-312017-12-31
Value3.3353.4543.3463.993
Percentage of DefinedBenefitPlanExpectedFutureBenefitPaymentsYearFour100.0100.0100.0100.0

us-gaap:PensionPlansDefinedBenefit


Defined
Period End2020-12-312019-12-312018-12-312017-12-31
Value22212020
Percentage of DefinedBenefitPlanExpectedFutureBenefitPaymentsYearFour666.7612.9606.1506.0

us-gaap:DefinedBenefitPlanExpectedFutureBenefitPaymentsYearThree us-gaap:RetirementPlanType

us-gaap:DefinedBenefitPlanExpectedFutureBenefitPaymentsYearThree

us-gaap:OtherPostretirementBenefitPlansDefinedBenefit


Defined
Period End2020-12-312019-12-312018-12-312017-12-31
Value3.3713.5193.233.859
Percentage of DefinedBenefitPlanExpectedFutureBenefitPaymentsYearThree100.0100.0100.0100.0

us-gaap:PensionPlansDefinedBenefit


Defined
Period End2020-12-312019-12-312018-12-312017-12-31
Value21201918
Percentage of DefinedBenefitPlanExpectedFutureBenefitPaymentsYearThree629.4574.1594.9491.6

us-gaap:DefinedBenefitPlanExpectedFutureBenefitPaymentsYearTwo us-gaap:RetirementPlanType

us-gaap:DefinedBenefitPlanExpectedFutureBenefitPaymentsYearTwo

us-gaap:OtherPostretirementBenefitPlansDefinedBenefit


Defined
Period End2020-12-312019-12-312018-12-312017-12-31
Value3.4083.3993.2373.653
Percentage of DefinedBenefitPlanExpectedFutureBenefitPaymentsYearTwo100.0100.0100.0100.0

us-gaap:PensionPlansDefinedBenefit


Defined
Period End2020-12-312019-12-312018-12-312017-12-31
Value20191818
Percentage of DefinedBenefitPlanExpectedFutureBenefitPaymentsYearTwo596.4566.4561.1493.0

us-gaap:DefinedBenefitPlanFundedStatusOfPlan us-gaap:RetirementPlanType

us-gaap:DefinedBenefitPlanFundedStatusOfPlan

us-gaap:OtherPostretirementBenefitPlansDefinedBenefit


Defined
Period End2020-12-312019-12-312018-12-312017-12-312016-12-31
Value-33641000.0-13249000.0-16040000.0-23805000.0-25273000.0
Percentage of DefinedBenefitPlanFundedStatusOfPlan100.0100.0100.0100.0100.0

us-gaap:PensionPlansDefinedBenefit


Defined
Period End2020-12-312019-12-312018-12-312017-12-312016-12-31
Value-203980000.0-188060000.0-176310000.0-175610000.0-166720000.0
Percentage of DefinedBenefitPlanFundedStatusOfPlan606.31419.41099.2737.7659.7

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

us-gaap:DerivativeAssetFairValueGrossAssetIncludingNotSubjectToMasterNettingArrangement

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


Derivative
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-31
Value276.386.6974.963293710
Percentage of DerivativeAssetFairValueGrossAssetIncludingNotSubjectToMasterNettingArrangement100.0100.0100.0100.0100.0100.0100.0

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


Derivative
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-31
Value268113103415113055
Percentage of DerivativeAssetFairValueGrossAssetIncludingNotSubjectToMasterNettingArrangement980.31783.31550.0844.2178.2346.5510.1

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

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


Derivative
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-31
Value295120110468116766
Percentage of DerivativeAssetFairValueGrossAssetIncludingNotSubjectToMasterNettingArrangement1080.31883.31650.0944.2278.2446.5610.1

us-gaap:DerivativeAssetFairValueGrossAssetIncludingNotSubjectToMasterNettingArrangement us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FairValueByMeasurementFrequency

us-gaap:FairValueInputsLevel1, us-gaap:FairValueMeasurementsRecurring


Derivative
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-31
Value276.386.6974.963293710
Percentage of DerivativeAssetFairValueGrossAssetIncludingNotSubjectToMasterNettingArrangement100.0100.0100.0100.0100.0100.0100.0

us-gaap:FairValueInputsLevel2, us-gaap:FairValueMeasurementsRecurring


Derivative
Period End2021-03-312020-06-302020-03-312019-12-31
Value0.2410.00.00.581
Percentage of DerivativeAssetFairValueGrossAssetIncludingNotSubjectToMasterNettingArrangement3.80.00.05.3

us-gaap:FairValueInputsLevel3, us-gaap:FairValueMeasurementsRecurring


Derivative
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-31
Value268113103415113055
Percentage of DerivativeAssetFairValueGrossAssetIncludingNotSubjectToMasterNettingArrangement980.31783.31550.0844.2178.2346.5510.1

us-gaap:DerivativeAssetFairValueGrossAssetIncludingNotSubjectToMasterNettingArrangement us-gaap:FairValueByMeasurementBasis, us-gaap:FairValueByMeasurementFrequency

us-gaap:EstimateOfFairValueFairValueDisclosure, us-gaap:FairValueMeasurementsRecurring


Derivative
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-31
Value295120110468116767
Percentage of DerivativeAssetFairValueGrossAssetIncludingNotSubjectToMasterNettingArrangement1080.31887.11650.0944.2278.2446.5615.4

us-gaap:DerivativeAssetFairValueGrossLiabilityAndObligationToReturnCashOffset us-gaap:DerivativeInstrumentRisk, us-gaap:FairValueByMeasurementFrequency

us-gaap:DerivativeAssetFairValueGrossLiabilityAndObligationToReturnCashOffset

oke:FinancialContracts, us-gaap:FairValueMeasurementsRecurring


Derivative
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302018-12-31
Value295120110465214028403832
Percentage of DerivativeAssetFairValueGrossLiabilityAndObligationToReturnCashOffset100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DerivativeAssetFairValueGrossLiabilityAndObligationToReturnCashOffset us-gaap:FairValueByMeasurementFrequency

us-gaap:FairValueMeasurementsRecurring


Derivative
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302015-12-31
Value29512011046521402840382732542423241715174.767.38942
Percentage of DerivativeAssetFairValueGrossLiabilityAndObligationToReturnCashOffset100.0100.0100.0100.0100.0100.0100.0100.0100.00.0100.00.00.00.00.00.00.00.00.00.00.0

us-gaap:DerivativeAssets us-gaap:FairValueByMeasurementFrequency

us-gaap:DerivativeAssets

us-gaap:FairValueMeasurementsRecurring


Derivative
Period End2021-03-312020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312011-12-31
Value0.24128273840297.9036750298349453949484.6186.269297.35122313029302740606169305161
Percentage of DerivativeAssets100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DerivativeCollateralRightToReclaimCash

us-gaap:DerivativeCollateralRightToReclaimCash


Derivative
Period End2021-06-302021-03-312020-12-312020-09-302018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-06-302010-12-31
Value3353283421161720271017160.00.00.00.00.00.00.03.52.8150.00.7274.57.68.40.31.70.91.1
Percentage of DerivativeCollateralRightToReclaimCash100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.00.00.00.00.00.00.0100.0100.0100.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DerivativeFairValueOfDerivativeAsset

us-gaap:DerivativeFairValueOfDerivativeAsset


Derivative
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302019-12-312019-06-302018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312010-12-31
Value2951201104681676710010453106746354665312176349514449553329426410911270102200419676630315
Percentage of DerivativeFairValueOfDerivativeAsset100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

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

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


Derivative
Period End2021-06-302021-03-312020-12-31
Value287113107
Percentage of DerivativeFairValueOfDerivativeAsset97.294.697.3

oke:FinancialDerivativeInstrument, oke:FullyNettedAssetsLiabilities, us-gaap:CommodityContract, us-gaap:Nondesignated


Derivative
Period End2021-06-302021-03-312020-12-31
Value8.1986.2473.037
Percentage of DerivativeFairValueOfDerivativeAsset2.85.22.7

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


Derivative
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312015-12-31
Value10746801676472623078461816169.187.5776.1541.15539
Percentage of DerivativeFairValueOfDerivativeAsset97.399.199.80.096.80.092.60.078.844.434.415.722.814.413.89.32.278.9

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


Derivative
Period End2020-12-312020-09-302020-06-302019-12-312019-06-302018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312015-12-31
Value3.0370.4080.1720.00.0890.04.2575.2213.4657.4775.8622.5874.4514.3466.919
Percentage of DerivativeFairValueOfDerivativeAsset2.70.90.20.00.10.04.19.73.210.09.24.76.78.213.9

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

us-gaap:OtherCurrentAssets, us-gaap:InterestRateContract, us-gaap:DesignatedAsHedgingInstrument


Derivative
Period End2021-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-31
Value0.2410.00.00.00.0190.00.0591.330.2520.4930.090.0
Percentage of DerivativeFairValueOfDerivativeAsset0.20.00.00.00.019.00.00.055.71.80.40.90.10.0

us-gaap:DerivativeFairValueOfDerivativeAsset us-gaap:HedgingDesignation

us-gaap:DesignatedAsHedgingInstrument


Derivative
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302011-12-31
Value2871141074680167678067351001004810366565161489.62314554250444855332942637779335881136184
Percentage of DerivativeFairValueOfDerivativeAsset97.294.897.399.199.80.0100.00.099.90.0100.095.990.396.890.089.694.392.391.880.185.087.286.198.098.598.8100.099.099.899.998.670.570.246.656.940.432.629.2

us-gaap:Nondesignated


Derivative
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302019-12-312019-06-302018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312010-12-31
Value8.1986.2473.0370.4080.1720.00.0890.04.2575.2213.4657.4776.5883.1275.1314.3462.3842.588.1456.9191.0210.6860.5750.00.3460.0640.0310.91132333744119282529446179
Percentage of DerivativeFairValueOfDerivativeAsset2.85.22.70.90.20.00.10.04.19.73.210.010.45.77.78.219.915.012.813.92.01.51.20.01.00.20.11.429.529.853.443.159.667.478.270.856.9

us-gaap:DerivativeFairValueOfDerivativeLiability

us-gaap:DerivativeFairValueOfDerivativeLiability


Derivative
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302019-12-312019-06-302018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302013-12-312012-12-31
Value63627134929229723129513110267365847344372941025617197.368134626291544
Percentage of DerivativeFairValueOfDerivativeLiability100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

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

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


Derivative
Period End2021-06-302021-03-312020-12-31
Value481168142
Percentage of DerivativeFairValueOfDerivativeLiability75.761.940.8

oke:FinancialDerivativeInstrument, oke:FullyNettedAssetsLiabilities, us-gaap:CommodityContract, us-gaap:Nondesignated


Derivative
Period End2021-06-302021-03-312020-12-31
Value8.176.1873.038
Percentage of DerivativeFairValueOfDerivativeLiability1.32.30.9

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


Derivative
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-31
Value1426056732636362431
Percentage of DerivativeFairValueOfDerivativeLiability40.820.619.00.011.70.012.40.024.1

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


Derivative
Period End2020-12-312020-09-302020-06-302019-12-312019-06-302018-12-31
Value3.0380.3760.1710.00.00.0
Percentage of DerivativeFairValueOfDerivativeLiability0.90.10.10.00.00.0

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

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


Derivative
Period End2021-06-302021-03-312020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312015-12-31
Value91650.0289014834.714150.00.00.00.00.01611129.936
Percentage of DerivativeFairValueOfDerivativeLiability14.324.00.00.038.90.028.10.011.40.00.00.00.00.048.726.317.755.3

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


Derivative
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-31
Value5532203231241241111262173145840.05.29110.00.00.00.00.0
Percentage of DerivativeFairValueOfDerivativeLiability8.711.858.379.281.00.048.30.058.80.063.80.07.830.80.00.00.00.00.0

us-gaap:DerivativeFairValueOfDerivativeLiability us-gaap:HedgingDesignation

us-gaap:DesignatedAsHedgingInstrument


Derivative
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302013-12-312012-12-31
Value6282653452922973442313172951771319862325140313867921004811187.03313452629145.011
Percentage of DerivativeFairValueOfDerivativeLiability98.797.799.199.999.90.0100.00.0100.00.0100.095.992.390.687.685.090.089.694.198.397.485.363.396.095.598.5100.099.7100.088.011.3

us-gaap:Nondesignated


Derivative
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302019-12-312019-06-302018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302013-12-312012-12-31
Value8.176.1873.0380.3760.1710.00.00.04.2385.1813.4097.3117.1523.4584.4644.2391.6452.6898.2986.5860.7910.3350.2040.0230.0750.01.9239
Percentage of DerivativeFairValueOfDerivativeLiability1.32.30.90.10.10.00.00.04.17.79.412.415.010.010.45.91.72.614.736.74.04.51.50.00.30.012.088.7

us-gaap:DerivativeLiabilities us-gaap:FairValueByMeasurementFrequency

us-gaap:DerivativeLiabilities

us-gaap:FairValueMeasurementsRecurring


Derivative
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312013-09-302013-06-302013-03-312012-12-312011-12-31
Value14697203231245270202276257149992.017.144124.8134.2821813157275439.936130.2549.947445.5570.9761010139
Percentage of DerivativeLiabilities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DerivativeLiabilityCollateralRightToReclaimCashOffset

us-gaap:DerivativeLiabilityCollateralRightToReclaimCashOffset


Derivative
Period End2021-06-302021-03-312020-12-312020-09-302019-12-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302015-12-31
Value1945435130.00.046360.729250.9125114160.0
Percentage of DerivativeLiabilityCollateralRightToReclaimCashOffset100.0100.0100.0100.00.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0

us-gaap:DerivativeLiabilityFairValueGrossAssetAndRightToReclaimCashOffset us-gaap:DerivativeInstrumentRisk, us-gaap:FairValueByMeasurementFrequency

us-gaap:DerivativeLiabilityFairValueGrossAssetAndRightToReclaimCashOffset

oke:FinancialContracts, us-gaap:FairValueMeasurementsRecurring


Derivative
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302018-12-31
Value49017414560527328403832
Percentage of DerivativeLiabilityFairValueGrossAssetAndRightToReclaimCashOffset100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DerivativeLiabilityFairValueGrossAssetAndRightToReclaimCashOffset us-gaap:FairValueByMeasurementFrequency

us-gaap:FairValueMeasurementsRecurring


Derivative
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302015-12-31
Value490174145605273284038273210060235343162956228.026
Percentage of DerivativeLiabilityFairValueGrossAssetAndRightToReclaimCashOffset100.0100.0100.0100.0100.0100.0100.0100.0100.00.0100.00.00.00.00.00.00.00.00.00.00.0

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

us-gaap:DerivativeLiabilityFairValueGrossLiabilityIncludingNotSubjectToMasterNettingArrangement

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


Derivative
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-31
Value99181013100.9114.811
Percentage of DerivativeLiabilityFairValueGrossLiabilityIncludingNotSubjectToMasterNettingArrangement100.0100.0100.0100.0100.0100.0100.0

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


Derivative
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-31
Value39015513547467224
Percentage of DerivativeLiabilityFairValueGrossLiabilityIncludingNotSubjectToMasterNettingArrangement391.3819.41288.2349.7448.37999.0515.2

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

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


Derivative
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-31
Value49017414560567329
Percentage of DerivativeLiabilityFairValueGrossLiabilityIncludingNotSubjectToMasterNettingArrangement491.3919.41388.2449.7548.38099.1615.2

us-gaap:DerivativeLiabilityFairValueGrossLiabilityIncludingNotSubjectToMasterNettingArrangement us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FairValueByMeasurementFrequency

us-gaap:FairValueInputsLevel1, us-gaap:FairValueMeasurementsRecurring


Derivative
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-31
Value99181013100.9114.811
Percentage of DerivativeLiabilityFairValueGrossLiabilityIncludingNotSubjectToMasterNettingArrangement100.0100.0100.0100.0100.0100.0100.0

us-gaap:FairValueInputsLevel2, us-gaap:FairValueMeasurementsRecurring


Derivative
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-31
Value14697203231241270201
Percentage of DerivativeLiabilityFairValueGrossLiabilityIncludingNotSubjectToMasterNettingArrangement146.8512.81939.21717.32330.029670.44197.5

us-gaap:FairValueInputsLevel3, us-gaap:FairValueMeasurementsRecurring


Derivative
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-31
Value39015513547467224
Percentage of DerivativeLiabilityFairValueGrossLiabilityIncludingNotSubjectToMasterNettingArrangement391.3819.41288.2349.7448.37999.0515.2

us-gaap:DerivativeLiabilityFairValueGrossLiabilityIncludingNotSubjectToMasterNettingArrangement us-gaap:FairValueByMeasurementBasis, us-gaap:FairValueByMeasurementFrequency

us-gaap:EstimateOfFairValueFairValueDisclosure, us-gaap:FairValueMeasurementsRecurring


Derivative
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-31
Value636271349292297344231
Percentage of DerivativeLiabilityFairValueGrossLiabilityIncludingNotSubjectToMasterNettingArrangement638.11432.23327.52167.02878.337769.54812.7

us-gaap:DerivativeNotionalAmount oke:DerivativeInstrumentByMethodForSettingNotionalAmount, us-gaap:DerivativeInstrumentRisk, us-gaap:DerivativeInstrumentsGainLossByHedgingRelationship, us-gaap:LongtermDebtType

us-gaap:DerivativeNotionalAmount

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


Derivative
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302018-12-31
Value110011001100110011001100180018003000
Percentage of DerivativeNotionalAmount100.0100.0100.0100.0100.0100.0100.0100.0100.0

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

oke:NetPurchasorSellor, us-gaap:InterestRateContract, us-gaap:DesignatedAsHedgingInstrument


Derivative
Period End2021-03-312020-12-312019-12-31
Value110011003100
Percentage of DerivativeNotionalAmount100.0100.0172.2

oke:Purchasor, us-gaap:InterestRateContract, us-gaap:DesignatedAsHedgingInstrument