OGS


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:StatementEquityComponents

us-gaap:CommonStockSharesAuthorized

us-gaap:CommonStockSharesOutstanding

us-gaap:WeightedAverageNumberOfDilutedSharesOutstanding

us-gaap:WeightedAverageNumberOfSharesOutstandingBasic

us-gaap:EarningsPerShareBasic

us-gaap:EarningsPerShareDiluted

us-gaap:ComprehensiveIncomeNetOfTax

us-gaap:CostOfGoodsAndServicesSold

us-gaap:IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest

us-gaap:IncomeTaxExpenseBenefit

us-gaap:InterestExpense

us-gaap:NetIncomeLoss
us-gaap:StatementEquityComponents

us-gaap:OperatingIncomeLoss

us-gaap:OtherComprehensiveIncomeLossNetOfTax
us-gaap:StatementEquityComponents

us-gaap:OtherNonoperatingIncomeExpense
ogs:OTHERINCOMEANDOTHEREXPENSE

us-gaap:RegulatedOperatingRevenue

us-gaap:Assets

us-gaap:LiabilitiesAndStockholdersEquity

us-gaap:StockholdersEquity
us-gaap:StatementEquityComponents

us-gaap:AssetsCurrent

us-gaap:CashAndCashEquivalentsAtCarryingValue

us-gaap:CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents

us-gaap:ReceivablesNetCurrent

us-gaap:OtherAssetsCurrent

us-gaap:OperatingLeaseRightOfUseAsset

us-gaap:OtherAssetsNoncurrent

us-gaap:AccountsPayableCurrent

us-gaap:AccruedLiabilitiesCurrent

us-gaap:LiabilitiesCurrent

us-gaap:OperatingLeaseLiabilityCurrent

us-gaap:OtherLiabilitiesCurrent

us-gaap:LongTermDebt

us-gaap:LongTermDebtNoncurrent

us-gaap:DeferredTaxLiabilitiesNoncurrent

us-gaap:DeferredIncomeTaxLiabilitiesNet

us-gaap:PensionAndOtherPostretirementDefinedBenefitPlansLiabilitiesNoncurrent
us-gaap:RetirementPlanType

us-gaap:OtherLiabilitiesNoncurrent

us-gaap:OperatingLeaseLiabilityNoncurrent

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearTwo

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearThree

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearFour

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearFive

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueAfterYearFive

us-gaap:OperatingLeaseLiability

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDue

us-gaap:LesseeOperatingLeaseLiabilityUndiscountedExcessAmount

us-gaap:StockholdersEquity
us-gaap:StatementEquityComponents

us-gaap:CommonStockValue

us-gaap:AdditionalPaidInCapital

us-gaap:RetainedEarningsAccumulatedDeficit

us-gaap:AccumulatedOtherComprehensiveIncomeLossNetOfTax

us-gaap:StockIssuedDuringPeriodValueNewIssues
us-gaap:StatementEquityComponents

us-gaap:NetCashProvidedByUsedInOperatingActivities

us-gaap:NetCashProvidedByUsedInInvestingActivities

us-gaap:NetCashProvidedByUsedInFinancingActivities

us-gaap:CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect

us-gaap:DeferredIncomeTaxExpenseBenefit

us-gaap:IncreaseDecreaseInAccountsPayable

us-gaap:IncreaseDecreaseInInventories

us-gaap:IncreaseDecreaseInOtherOperatingCapitalNet

us-gaap:NetCashProvidedByUsedInOperatingActivities

us-gaap:NetIncomeLoss
us-gaap:StatementEquityComponents

us-gaap:ShareBasedCompensation

us-gaap:NetCashProvidedByUsedInInvestingActivities

us-gaap:PaymentsToAcquirePropertyPlantAndEquipment

us-gaap:NetCashProvidedByUsedInFinancingActivities

us-gaap:PaymentsOfDividends
us-gaap:LongtermDebtType
us-gaap:DebtInstrumentInterestRateStatedPercentage

us-gaap:DeferredTaxLiabilities

ogs:ApproximateAggregateNaturalGasPurchaseCosts
us-gaap:SubsequentEventType
ogs:CommonStockDividendsDeclaredAnnualizedBasis
ogs:OTHERINCOMEANDOTHEREXPENSE
ogs:EarningsonInvestmentsAssociatedwithNonqualifiedEmployeeBenefitPlans

ogs:EnvironmentalReserveEstimateRangeHigh

ogs:EnvironmentalReserveEstimateRangeLow

ogs:IncreaseDecreaseInRegulatoryAssetsAndLiabilitiesCurrent

ogs:IncreaseDecreaseInRegulatoryAssetsAndLiabilitiesNonCurrent

ogs:OthercomprehensiveincomelossreclassificationRegulatoryadjustments

ogs:Othercomprehensiveincomelossreclassificationadjustmentbeforetaxandregulatoryadjustments
ogs:REVENUE
ogs:Otherrevenuesnaturalgassalesrelated

ogs:ReductioninincometaxexpensefortheamortizationoftheregulatoryliabilityassociatedwithexcessADITthatwasreturnedtocustomers

us-gaap:AmortizationOfRateDeferral

us-gaap:CapitalExpendituresIncurredButNotYetPaid

us-gaap:CommonStockDividendsPerShareCashPaid

us-gaap:CommonStockDividendsPerShareDeclared
us-gaap:SubsequentEventType

us-gaap:DefinedBenefitPlanAmortizationOfGainsLosses
us-gaap:RetirementPlanType

us-gaap:DefinedBenefitPlanAmortizationOfPriorServiceCostCredit
us-gaap:RetirementPlanType
us-gaap:RetirementPlanType
us-gaap:DefinedBenefitPlanExpectedReturnOnPlanAssets
us-gaap:RetirementPlanType
us-gaap:DefinedBenefitPlanInterestCost
us-gaap:RetirementPlanType
us-gaap:DefinedBenefitPlanNetPeriodicBenefitCost
us-gaap:RetirementPlanType
us-gaap:DefinedBenefitPlanServiceCost

us-gaap:DividendsCommonStock
us-gaap:StatementEquityComponents

us-gaap:EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate

us-gaap:ExcessTaxBenefitFromShareBasedCompensationFinancingActivities

us-gaap:IncreaseDecreaseInCustomerDeposits

us-gaap:IncreaseDecreaseInMaterialsAndSupplies

us-gaap:IncreaseDecreaseInOtherCurrentAssetsAndLiabilitiesNet

us-gaap:IncreaseDecreaseInOtherNoncurrentAssetsAndLiabilitiesNet

us-gaap:IncreaseDecreaseInOtherRegulatoryAssets

us-gaap:IncreaseDecreaseInPropertyAndOtherTaxesPayable

us-gaap:IncreaseDecreaseInReceivables

us-gaap:IncreaseDecreaseInRegulatoryAssetsAndLiabilities

us-gaap:OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentNetOfTax

us-gaap:OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansTax

us-gaap:OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansBeforeTax

us-gaap:OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansNetOfTax

us-gaap:OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansTax

us-gaap:PaymentsForProceedsFromOtherInvestingActivities

us-gaap:PaymentsOfDebtIssuanceCosts

us-gaap:ProceedsFromIssuanceOfCommonStock

us-gaap:ProceedsFromIssuanceOfSeniorLongTermDebt

us-gaap:ProceedsFromRepaymentsOfCommercialPaper

us-gaap:ProceedsFromSaleOfOtherAssetsInvestingActivities

us-gaap:ProvisionForDoubtfulAccounts

us-gaap:RegulatedOperatingRevenueGas
ogs:REVENUE

us-gaap:RegulatedOperatingRevenueOther
ogs:REVENUE
us-gaap:StatementEquityComponents
us-gaap:StockIssuedDuringPeriodSharesNewIssues

us-gaap:UtilitiesOperatingExpense

us-gaap:UtilitiesOperatingExpenseDepreciationAndAmortization

us-gaap:UtilitiesOperatingExpenseMaintenanceAndOperations

us-gaap:UtilitiesOperatingExpenseTaxes

us-gaap:WeightedAverageNumberDilutedSharesOutstandingAdjustment

dei:EntityCommonStockSharesOutstanding

ogs:AtTheMarketEquityProgramIssuanceCosts

ogs:AttheMarketEquityProgramEquityAvailableforIssuance

ogs:Capitalizednonservicecostcomponentsasaregulatoryasset

ogs:Commercialpapermaximumborrowingcapacity

ogs:Corporatebondsinotherassets

ogs:DebtInstrumentCovenantComplianceDefaultProvisionIndebtnednessThreshold

ogs:DeferredTaxAssetsLeasingArrangements

ogs:Deferredtaxassetemployeebenefitsandotheraccruedliabilities

ogs:Deferredtaxassetregulatoryadjustments
us-gaap:RetirementPlanType
ogs:DefinedBenefitPlanAccumulatedOtherComprehensiveIncomeLossBeforeRegulatoryAssetsAndTaxes
us-gaap:FairValueByFairValueHierarchyLevel
ogs:Fairvaluenaturalgascalloptions
us-gaap:FairValueByFairValueHierarchyLevel
ogs:Fairvalueofnaturalgascalloptionsheld

ogs:February2021NaturalGasPurchases

ogs:KGSDeferredExtraordinaryCostsFrom2021WinterStormUri
us-gaap:LongtermDebtType
ogs:LineofCreditFacilityOptiontoIncreaseBorrowingCapacity
us-gaap:LongtermDebtType
ogs:LineofCreditFacilitySublimit

ogs:Netregulatoryassetsandliabilitiescurrent

ogs:Netregulatoryassetsandliabilitiesnoncurrent
us-gaap:LongtermDebtType
ogs:ONEGas2021TermLoanFacilityMaximumBorrowingCapacity

ogs:Premiumsrecordedinothercurrentassetsonnaturalgascontractsheld

ogs:ReclassificationOther

ogs:ReductionInADITRecordedAsAnEDITRegulatoryLiabilityAssociatedWithReductionOfOklahomaStateIncomeTax

ogs:ReductionToBaseRatesDueToKansasGasServiceTaxReformRegulatoryLiability

ogs:RegulatoryAssetForCostsAssociatedWithManufacturedGasSites
us-gaap:AwardType
ogs:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsFairValueOfSharesGranted

ogs:TGSDeferredExtraordinaryCostsFrom2021WinterStormUri

ogs:TotalDeferredCreditsAndOtherLiabilities

ogs:Totalgoodwillandotherassets

ogs:Treasurynotesinotherassets

us-gaap:AccrualForEnvironmentalLossContingencies

us-gaap:AccrualForTaxesOtherThanIncomeTaxesCurrent
us-gaap:RetirementPlanType
us-gaap:AccumulatedOtherComprehensiveIncomeLossDefinedBenefitPensionAndOtherPostretirementPlansNetOfTax

us-gaap:AllowanceForDoubtfulAccountsPremiumsAndOtherReceivables

us-gaap:AllowanceForDoubtfulAccountsReceivableCurrent
us-gaap:LongtermDebtType
us-gaap:BridgeLoan

us-gaap:CapitalizationLongtermDebtAndEquity

us-gaap:CommercialPaper

us-gaap:CustomerDepositsCurrent

us-gaap:DebtInstrumentUnamortizedDiscountPremiumAndDebtIssuanceCostsNet

us-gaap:DeferredIncomeTaxLiabilities

us-gaap:DeferredTaxAssetsGross

us-gaap:DeferredTaxAssetsOther

us-gaap:DeferredTaxLiabilitiesLeasingArrangements

us-gaap:DeferredTaxLiabilitiesOther

us-gaap:DeferredTaxLiabilitiesPropertyPlantAndEquipment
us-gaap:RetirementPlanType
us-gaap:DeferredTaxLiabilitiesRegulatoryAssets

us-gaap:DeferredTaxLiabilitiesRegulatoryAssetsAndLiabilities
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:DefinedBenefitPlanBenefitObligation
us-gaap:RetirementPlanType
us-gaap:DefinedBenefitPlanExpectedFutureBenefitPaymentsFiveFiscalYearsThereafter
us-gaap:RetirementPlanType
us-gaap:DefinedBenefitPlanExpectedFutureBenefitPaymentsNextTwelveMonths
us-gaap:RetirementPlanType
us-gaap:DefinedBenefitPlanExpectedFutureBenefitPaymentsYearFive
us-gaap:RetirementPlanType
us-gaap:DefinedBenefitPlanExpectedFutureBenefitPaymentsYearFour
us-gaap:RetirementPlanType
us-gaap:DefinedBenefitPlanExpectedFutureBenefitPaymentsYearThree
us-gaap:RetirementPlanType
us-gaap:DefinedBenefitPlanExpectedFutureBenefitPaymentsYearTwo
us-gaap:RetirementPlanType
us-gaap:DefinedBenefitPlanExpectedFutureEmployerContributionsNextFiscalYear
us-gaap:RetirementPlanType
us-gaap:DefinedBenefitPlanFundedStatusOfPlan

us-gaap:DerivativeNonmonetaryNotionalAmount
us-gaap:AwardType
us-gaap:EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized
us-gaap:DefinedBenefitPlanByPlanAssetCategories, us-gaap:RetirementPlanType
us-gaap:FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetValue
us-gaap:RetirementPlanType

us-gaap:InterestPayableCurrent

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueNextTwelveMonths

us-gaap:LineOfCreditFacilityRemainingBorrowingCapacity
us-gaap:FairValueByFairValueHierarchyLevel
us-gaap:LongTermDebtFairValue

us-gaap:MaterialsSuppliesAndOther

us-gaap:NetRegulatoryAssets
us-gaap:RetirementPlanType
us-gaap:PensionAndOtherPostretirementDefinedBenefitPlansCurrentLiabilities

us-gaap:PublicUtilitiesInventory

us-gaap:PublicUtilitiesPropertyPlantAndEquipmentAccumulatedDepreciation
us-gaap:PublicUtilityRegulatedOrUnregulatedStatus

us-gaap:PublicUtilitiesPropertyPlantAndEquipmentNet
us-gaap:PublicUtilityRegulatedOrUnregulatedStatus

us-gaap:PublicUtilitiesPropertyPlantAndEquipmentPlantInService
us-gaap:PropertyPlantAndEquipmentByType, us-gaap:PublicUtilityRegulatedOrUnregulatedStatus
us-gaap:PublicUtilityRegulatedOrUnregulatedStatus

us-gaap:RatioOfIndebtednessToNetCapital1
us-gaap:RegulatoryAsset
us-gaap:RegulatoryAssets
us-gaap:RetirementPlanType

us-gaap:RegulatoryAssetsCurrent
us-gaap:RegulatoryAsset

us-gaap:RegulatoryAssetsNoncurrent
ogs:OtherEmployeeBenefitPlans
us-gaap:RegulatoryAsset
us-gaap:RegulatoryLiability
us-gaap:RegulatoryLiabilities

us-gaap:RegulatoryLiabilityCurrent
us-gaap:RegulatoryLiability

us-gaap:RegulatoryLiabilityNoncurrent
us-gaap:RegulatoryLiability
us-gaap:AwardType
us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber
us-gaap:AwardType
us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue

us-gaap:UnbilledReceivablesCurrent

Plots across concepts


Expenses
Other Nonoperating Income Expense
Balance Sheet
Cash And Cash Equivalents At Carrying Value
Assets
Cash And Cash Equivalents At Carrying Value
Current Assets
Cash And Cash Equivalents At Carrying Value
NonCurrent Assets
Operating Lease Right Of Use Asset
Liabilities
Operating Lease Liability
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
Increase Decrease In Accounts Payable
NetCashProvidedByUsedInInvestingActivities
Net Cash Provided By Used In Investing Activities
Shares
Weighted Average Number Of Shares Outstanding Basic
OperatingLeaseLiability
Operating Lease Liability Current
LesseeOperatingLeaseLiabilityPaymentsDue
Lessee Operating Lease Liability Undiscounted Excess Amount
AccountsReceivable
Allowance For Doubtful Accounts Receivable Current

Tables

  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-31
us-gaap:CommonStockValue ██████████████████████████████▁0.5350.5320.5320.5310.5290.5290.5280.5270.5270.5270.5260.5260.5260.5260.5260.5260.5260.5260.5260.5260.5260.5260.5260.5260.5260.5260.5210.520.520.520.0
us-gaap:PreferredStockParOrStatedValuePerShare NANA1e-08NANANANANANANANANANANANANANANANANANANANANANANANANANANANA
 us-gaap:SharesIssued us-gaap:StatementEquityComponents us-gaap:CommonStockNANA53.166733NANANA52.771749NANANA52.598005NANANA52.598005NANANA52.598005NANANA52.598005NANANA52.083859NANANA0.0001
us-gaap:CommonStockSharesIssued ██████████████████████████████▁53.49923753.24501153.16673353.09689352.9205352.86080852.77174952.73662352.73422252.68663452.59800552.59800552.59800552.59800552.59800552.59800552.59800552.59800552.59800552.59800552.59800552.59800552.59800552.59800552.59800552.59011252.08385952.04574251.99254751.9730520.0001
us-gaap:CommonStockSharesAuthorized ██████████████████████████████▁250.0250.0250.0250.0250.0250.0250.0250.0250.0250.0250.0250.0250.0250.0250.0250.0250.0250.0250.0250.0250.0250.0250.0250.0250.0250.0250.0250.0250.0250.00.001
us-gaap:CommonStockSharesOutstanding ██████████████████████████████▁53.49923753.24501153.16673353.09689352.9205352.86080852.77174952.73662352.73422252.68663452.56490252.51682852.51682852.4698852.31251652.27344452.26729652.43191452.2832652.24527352.24094852.16158852.25922452.15127952.10275452.59011252.08385952.04574251.99254751.9730520.0001
us-gaap:WeightedAverageNumberOfDilutedSharesOutstanding █▁53.54853.515NA53.40853.26453.268NA53.26753.21553.206NA53.11252.89952.897NA52.92652.96953.056NA52.94252.83653.107NA53.07253.43853.446NA53.01452.44652.512NA
us-gaap:WeightedAverageNumberOfSharesOutstandingBasic █▁53.46653.372NA53.1953.05353.007NA52.93352.8952.825NA52.73652.69252.604NA52.48852.55352.576NA52.45352.38652.519NA52.40852.76752.707NA52.36151.79752.334NA
us-gaap:EarningsPerShareBasic ▃█▅▂▃█▅▂▃█▄▂▂█▄▂▂▇▄▂▂▆▄▁▂▅▄▁▁▅▃0.561.791.10.40.481.730.970.330.461.770.850.310.391.730.90.360.391.450.810.240.391.230.750.140.231.150.70.090.181.130.5799999999999998
us-gaap:EarningsPerShareDiluted ▃█▅▂▃█▅▂▃█▄▂▂█▄▂▂▇▄▂▂▆▄▁▂▅▃▁▁▅▃0.561.791.09000000000000030.390.481.720.960.330.461.760.840.310.391.720.890.360.391.440.80.240.381.220.740.140.231.130.690.090.181.130.5799999999999998
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-31
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-31
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-31
us-gaap:ComprehensiveIncomeNetOfTax ▃█▅▂▃█▄▂▃█▄▂▂█▄▂▂▇▄▂▂▆▄▁▂▅▃▁▂▅▃30.39295.87556.62321.30225.54891.90149.24717.61724.6393.8245.78516.47920.62290.75545.95518.92520.75276.58541.65312.85320.41564.85939.5527.51212.21860.52134.9824.57512.76955.68330.318
us-gaap:CostOfGoodsAndServicesSold ▁█93.701314.069NA40.48562.51226.139NA49.60782.588365.076NANANANANANANANANANANANANANANANANANANANANA
us-gaap:IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest ▃█▅▂▃█▅▂▃█▄▂▂█▆▂▃█▅▂▃▇▅▁▂▇▄▁▂▇▄36.557114.569.77425.33531.159111.72365.11521.59730.627112.26261.19821.94726.846115.77478.53829.88333.16114.55767.03620.63732.875104.78962.16412.019.6598.19559.5547.31515.37195.88849.906
us-gaap:IncomeTaxExpenseBenefit ▂▄▃▁▂▄▃▁▂▄▄▂▂▅▆▃▃█▅▂▃█▅▁▂█▅▁▂▇▄6.46418.92511.4434.2565.83420.04613.9534.146.15718.60216.4945.6716.42724.93931.41911.08612.53738.10124.7227.912.57540.04622.9624.6297.57437.81422.9472.6625.91736.81219.588
us-gaap:InterestExpense ▇███████▇█▇▄▃▄▃▃▃▃▃▂▂▂▂▃▂▂▁▂▃▅█14.99615.4415.42715.54215.84315.69315.71315.78315.39915.78614.58512.36512.00312.35211.78411.49511.30511.48111.23510.80910.84810.84710.97811.23311.1911.1699.95611.1611.77612.9515.664
us-gaap:NetIncomeLoss ▃█▅▂▃█▅▂▃█▄▂▂█▄▂▂▇▄▂▂▆▄▁▂▅▃▁▁▅▃30.09395.57558.33121.07925.32591.67751.16217.45724.4793.6644.70416.27620.41990.83547.11918.79720.62376.45642.31512.73720.364.74339.2027.37112.07660.38136.6074.6539.45459.07630.318
us-gaap:OperatingIncomeLoss ▃█▅▂▃█▅▂▃█▅▂▂█▅▂▃█▅▂▃▇▄▁▂▇▄▁▁▇▄51.102130.34585.02540.67944.608133.20481.97138.77746.891127.61980.85536.24141.043130.2989.51240.7844.052125.13278.53430.89243.621116.07373.90324.95131.27109.00570.0119.11926.812109.35365.014
us-gaap:OtherComprehensiveIncomeLossNetOfTax ▅▅▃▅▅▅▃▅▅▅▆▅▅▄▃▅▅▅▄▅▅▅▅▅▅▅▃▄█▁▅0.2990.3-1.7080.2230.2230.224-1.9150.160.160.161.0810.2030.203-0.08-1.1640.1280.1290.129-0.6610.1160.1150.1160.350.1410.1420.14-1.625-0.0783.315-3.3930.0
us-gaap:OtherNonoperatingIncomeExpense ▆▆▆▆█▁▅▅▅▆▂▄▄▄▃▃▃▃0.451-0.4050.1760.1982.394-5.788-1.143-1.397-0.8650.429-5.072-1.929-2.194-2.164-3.503-3.715-3.9-3.407NANANANANANANANANANANANANA
us-gaap:RegulatedOperatingRevenue ▂▇▅▁▂▆▅▁▂█▅▁▂█315.646625.293484.173244.64273.287528.168452.607248.563290.56661.0464.466238.28292.521638.464NA247.142279.689550.408NANANANANANANANANANANANANA
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-31
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-31
us-gaap:Assets ██▆▆▆▆▆▅▅▅▅▅▅▅▅▅▅▅▅▅▅▅▅▅▅▅▅▄▄▅▁8183.6498679.9046028.7125763.7645681.6125674.9055708.35533.185446.6065524.2925468.6425152.9575067.9195159.0935206.8784971.0634873.134889.8744942.7914693.6794610.8324598.1044644.414506.3214525.964605.4884649.214264.9774283.814382.0181e-06
us-gaap:LiabilitiesAndStockholdersEquity ▇█▄▄▄▄▄▃▃▃▃▃▃▃▃▃▂▃▃▂▂▂▂▂▂▂▂▂▂▂▁8183.6498679.9046028.7125763.7645681.6125674.9055708.35533.185446.6065524.2925468.6425152.9575067.9195159.0935206.8784971.0634873.134889.8744942.7914693.6794610.8324598.1044644.414506.3214525.964605.4884649.214264.9774283.814382.0183846.475
us-gaap:StockholdersEquity ██████▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▆▆▇▆▆▆▆▁2317.2662296.5992233.3112200.0172191.9872189.0122129.392101.8812108.4632104.782042.6562016.6242022.3442020.9481960.2091931.9921933.2961944.5781888.281862.3441875.5881867.1871841.5551810.9211818.8931839.6651794.0371770.9961780.0861782.7321e-06
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-31
us-gaap:AssetsCurrent ▃█▃▁▁▂▂▁▁▂▃▁▁▂▃▂▂▂▃▁▁▂▂▂▂▃▄▂▃▄▃603.7111158.671539.869369.704347.389407.667506.202389.683376.812516.27543.287374.511350.709501.696588.994445.553411.579481.132568.923377.173381.456417.611482.845417.347477.519604.444667.501505.182570.928724.348602.184
us-gaap:CashAndCashEquivalentsAtCarryingValue NANA7.993NANANA17.85312.56211.11419.62821.32312.4312.5844.53614.4136.8725.11313.20614.6634.51354.25752.6572.43352.974135.886142.50211.94359.685161.326178.6461e-06
us-gaap:CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents ▃█▁▁▁▁▁▁▁▁▁209.07704.9117.9936.18410.45411.06917.85312.56211.11419.62821.323NANANANANANANANANANANANANANANANANANANANA
us-gaap:ReceivablesNetCurrent ▂▅▅▁▂▄▅▂▃▇▆▂▂▆▆▂▂▄▅▁▁▃▄▁▂▆▆▂▃█▇160.647279.591292.985106.777138.885234.327260.012130.768169.801338.082295.421132.436163.967303.493298.768127.689152.278249.155290.944105.06115.265195.158216.343103.406142.701308.85326.749135.75192.104398.809356.988
us-gaap:OtherAssetsCurrent ▇▅▅▃▃▂▂▂▂▃▂▁▂▂▂▁▂▂▂▁▂▂▂▁▁▆▇▆▅▅█45.41934.75735.40624.12623.31121.04120.90616.99218.94621.4320.49513.76218.15418.75417.80715.01420.01418.61619.25712.45720.22216.79416.78912.22713.84343.90349.51640.52733.89235.32354.24
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-31
us-gaap:OperatingLeaseRightOfUseAsset NANA37.2NANANA34.235.837.338.532.0NANANANANANANANANANANANANANANANANANANANA
us-gaap:OtherAssetsNoncurrent ██▇▇▇▇▇▆▆▇▃▄▃▃▃▃▃▃▃▃▄▃▄▄▄▄▄▄▄▄▁101.922105.80996.87792.15895.30493.71287.88380.93686.88988.63746.21149.52848.00348.40347.15743.62547.71146.56343.77347.14249.29443.24755.83854.90557.72852.27451.31352.7957.75854.37617.658
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-31
us-gaap:AccountsPayableCurrent ▅█▅▁▁▂▄▁▁▄▆▁▂▂▅▁▁▂▄▂▁▁▃▁▁▃▅▃▃▆▆158.353227.955152.31365.31162.7182.088120.4962.57567.578119.629174.5168.33270.42977.566143.68168.18460.45876.142131.98870.56259.98359.887107.48257.2467.819105.058159.06497.653100.357175.526169.5
us-gaap:AccruedLiabilitiesCurrent 21.4NA36.401NANANANANANANA30.29423.96820.72412.83530.05818.53516.20212.47422.93117.81215.31415.031.4718.014.65113.64826.01920.768NANA4.791
us-gaap:LiabilitiesCurrent ▃█▇▅▄▇█▆▅▆▆█▇█▆▃▂▂▃▁▁▁▂▁▁▂▃▂▂▃▇369.305879.036797.079575.714490.755776.153872.737677.755578.353658.191698.891836.027749.338844.706673.33392.228292.685307.943443.933258.832217.984228.593304.221233.469246.936300.003392.433274.148268.362363.987769.077
us-gaap:OperatingLeaseLiabilityCurrent NANA7.0NANANANANANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:OtherLiabilitiesCurrent ▃▆▇▇▇██▆▇▇▂▁▁▁▂▂▂▃▁▁▁▃▁▁▂▂▃▂▃▅▄28.25557.58378.95268.89872.51180.67584.60366.6675.09873.96718.4467.85810.10210.39521.46519.46623.98226.8849.4518.21210.96525.74911.710.47814.83918.32428.13221.37234.79454.15542.422
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-31
us-gaap:LongTermDebt ██▁4099.9999999999994099.9999999999991300.0NA1600.01300.01300.01300.01300.01300.01300.01200.01200.01200.01200.0NA1200.01200.01200.01200.01200.01200.01200.01200.01200.0NA1200.0NANANA1000.0
us-gaap:LongTermDebtNoncurrent ██▄▄▄▃▃▃▃▃▃▃▃▃▃▃▃▃▃▃▃▃▃▃▃▃▃▃▃▃▁4082.834082.6611582.4281582.1931581.9311286.1931286.0641285.9371285.8111285.5871285.483893.88893.671893.4631193.2571193.0521192.8481192.6471192.4461192.2481192.051191.8541201.3051201.3061201.3081201.311201.3111201.3131201.3141201.3161.318
us-gaap:DeferredTaxLiabilitiesNoncurrent NANA656.806NANANA682.632675.613673.939666.438652.426634.65628.532625.724599.9451089.0611077.9921065.0961038.5681011.691987.906967.943951.785907.647900.63897.458894.585835.345834.686831.371743.452
us-gaap:DeferredIncomeTaxLiabilitiesNet ▅▇▃▁▁█▆670.672685.901656.806642.309637.975698.877682.632NANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:PensionAndOtherPostretirementDefinedBenefitPlansLiabilitiesNoncurrent ▁▁▁▂▂▂▂▄▄▄▄▃▃▄▄▇████▇▇▇▇▇▇█82.12289.8697.63798.257104.075109.865115.657164.206168.387173.296178.72155.443160.382166.611172.938282.904296.881300.535303.507291.23263.869268.081272.309274.073277.878286.654287.779NANANA0.0
us-gaap:OtherLiabilitiesNoncurrent ▃▃▃▃▄▄▄▄▄▄▂▂▂▂▂▂▂▂▂▂▁▁▁▂▂▂▂▇██▁102.613108.718113.888110.016116.774120.595118.302120.827122.776124.25789.694.61691.93589.53987.77881.82679.42879.07576.05777.33473.43574.44673.23578.90580.31580.39879.065183.175199.362202.61265.974
us-gaap:OperatingLeaseLiabilityNoncurrent NANA30.8NANANANANANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearTwo NANA7.4NANANANANANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearThree NANA6.2NANANANANANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearFour NANA4.7NANANANANANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearFive NANA4.1NANANANANANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueAfterYearFive NANA11.0NANANANANANANANANANANANANANANANANANANANANANANANANANANANA
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-31
us-gaap:StockholdersEquity ██████▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▆▆▇▆▆▆▆▁2317.2662296.5992233.3112200.0172191.9872189.0122129.392101.8812108.4632104.782042.6562016.6242022.3442020.9481960.2091931.9921933.2961944.5781888.281862.3441875.5881867.1871841.5551810.9211818.8931839.6651794.0371770.9961780.0861782.7321e-06
us-gaap:CommonStockValue ██████████████████████████████▁0.5350.5320.5320.5310.5290.5290.5280.5270.5270.5270.5260.5260.5260.5260.5260.5260.5260.5260.5260.5260.5260.5260.5260.5260.5260.5260.5210.520.520.520.0
us-gaap:AdditionalPaidInCapital ██████████████████████████████▁1776.9111755.4761756.9211751.351735.7881729.5871733.0921728.2371725.8431720.221727.4921725.3611723.7951721.7011737.5511735.6381734.0831732.3351749.5741748.9651756.7991754.8991764.8751762.5081764.171759.9341758.7961755.5391754.6361752.1050.0
us-gaap:RetainedEarningsAccumulatedDeficit ██▇▇▇▇▆▆▆▆▅▅▅▅▄▄▄▄▃▃▃▃▂▂▂▂▂▁▁▁▁546.998548.068483.635454.205461.962465.411402.509377.941387.077389.177320.869300.547308.652312.595246.121221.185224.57226.195161.021137.221142.996141.1895.04671.74680.27384.23939.89418.48628.40133.50.0
us-gaap:AccumulatedOtherComprehensiveIncomeLossNetOfTax ▂▁▁▃▂▂▂▄▄▃▄▃▃▃▃▄▄▄▄▄▄▄▄▄▄▃▃▅▅▅█-7.178-7.477-7.777-6.069-6.292-6.515-6.739-4.824-4.984-5.144-4.086-5.167-5.37-5.573-5.493-4.329-4.457-4.586-4.715-4.054-4.17-4.285-4.401-4.751-4.892-5.034-5.174-3.549-3.471-3.3930.0
us-gaap:StockIssuedDuringPeriodValueNewIssues █▁21.178-1.705NA15.3365.974-3.736NA2.1695.397-5.3534.4091.9614.909-5.8794.2171.7255.017-6.7662.569-7.8126.2433.2196.730.1616.8920.882.6342.6392.5311.811NA
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-31
us-gaap:NetCashProvidedByUsedInOperatingActivities ▇▁▇▇▇█▇▇██▇▇██▇▇██▇▇▇█▇▇▇█▇▇▇█▇81.917-1659.26539.17146.64495.952182.73321.80247.372118.88122.29130.92636.811176.673223.284-48.60423.133117.035162.2360.13714.11787.274180.03944.6696.986101.462241.09-3.345-11.68879.598182.098-21.916
us-gaap:NetCashProvidedByUsedInInvestingActivities ▁▃▁▂▁▂▂▁▃▅▂▃▄▅▃▄▅▆▆▅▇▆▄▆▆█▆▆▅▇▅-117.941-101.203-122.56-112.794-121.837-113.181-114.115-121.483-100.991-86.343-115.104-103.512-89.235-86.599-107.303-94.251-83.779-70.41-77.735-86.576-69.399-74.869-94.642-74.253-70.511-54.914-72.484-76.002-82.886-65.731-85.425
us-gaap:NetCashProvidedByUsedInFinancingActivities ▁█▂▂▂▂▂▂▂▂▂▂▂▂▂▂▂▂▂▂▂▂▂▂▂▂▂▂▂▂▂-459.8172457.38685.19861.8825.27-76.33697.60475.559-26.403-37.64393.07166.551-119.394-106.562163.44872.877-41.349-93.28387.74822.715-16.275-54.946-0.568-15.645-37.567-55.61728.087-13.951-14.03259.108107.83
us-gaap:CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect ▁█-495.841696.918NA-4.27-0.615-6.784NA1.448-8.514-1.695NANANANANANANANANANANANANANANANANANANANANA
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-31
us-gaap:DeferredIncomeTaxExpenseBenefit ▂▄▂▁▁▂▂▁▂▂▃▂▂▅▆▃▃▇▅▅▄▃█▂▁▃█▁▁▁▄6.38718.5677.311.3962.9236.8564.208-0.3024.5734.82816.6056.0916.46924.07731.06411.02112.84737.46127.01723.7419.91816.11344.4056.2322.69210.4647.1070.9481.7280.15219.572
us-gaap:IncreaseDecreaseInAccountsPayable ▁▇▇▄▃▃▆▄▂▂█▄▃▂▇▄▃▂▆▄▄▂▆▃▂▂▆▄▁▄█-73.68387.20279.2240.072-16.693-34.22754.372-4.325-56.168-53.172100.7424.571-12.019-56.40967.9283.009-15.035-53.95760.5199.974-2.837-40.0645.313-12.577-38.594-53.77763.182-3.671-72.4836.09193.725
us-gaap:IncreaseDecreaseInInventories ▇▃▅▇▆▃▅▆▇▃▄▇▆▂▄▇▆▄▄▇▆▃▄▇▇▁▄██▂▄41.427-49.625-11.43133.18524.16-56.227-14.19130.21536.76-55.82-19.18645.99929.926-79.598-27.48742.64523.765-34.201-18.79840.48923.188-61.6-17.75940.02138.614-104.023-32.0265.27570.391-84.474-33.968
us-gaap:IncreaseDecreaseInOtherOperatingCapitalNet NANA-21.687.80111.8359.748-13.6314.609-4.4912.824-12.2630.991-1.37110.69-3.5688.0359.327-3.447-45.9966.14730.729-14.999-9.3464.187-5.77917.085-25.16130.8923.4786.601-6.152
us-gaap:NetCashProvidedByUsedInOperatingActivities ▇▁▇▇▇█▇▇██▇▇██▇▇██▇▇▇█▇▇▇█▇▇▇█▇81.917-1659.26539.17146.64495.952182.73321.80247.372118.88122.29130.92636.811176.673223.284-48.60423.133117.035162.2360.13714.11787.274180.03944.6696.986101.462241.09-3.345-11.68879.598182.098-21.916
us-gaap:NetIncomeLoss ▃█▅▂▃█▅▂▃█▄▂▂█▄▂▂▇▄▂▂▆▄▁▂▅▃▁▁▅▃30.09395.57558.33121.07925.32591.67751.16217.45724.4793.6644.70416.27620.41990.83547.11918.79720.62376.45642.31512.73720.364.74339.2027.37112.07660.38136.6074.6539.45459.07630.318
us-gaap:ShareBasedCompensation ▅▄▄▄▅▄▄▄▅▄▄▄▄▄▄▄▄▄▃▃▅▆█▁▃▄▄▄▃▃▁3.0922.5872.3642.352.8282.2612.1612.2422.9571.9542.02.1152.1351.9451.9461.9792.532.4211.8781.893.354.1015.3240.1791.22.4841.9622.0021.8551.7940.0
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-31
us-gaap:NetCashProvidedByUsedInInvestingActivities ▁▃▁▂▁▂▂▁▃▅▂▃▄▅▃▄▅▆▆▅▇▆▄▆▆█▆▆▅▇▅-117.941-101.203-122.56-112.794-121.837-113.181-114.115-121.483-100.991-86.343-115.104-103.512-89.235-86.599-107.303-94.251-83.779-70.41-77.735-86.576-69.399-74.869-94.642-74.253-70.511-54.914-72.484-76.002-82.886-65.731-85.425
us-gaap:PaymentsToAcquirePropertyPlantAndEquipment █▆█▇█▇▇█▆▄▇▆▅▄▆▅▄▃▃▄▃▃▅▃▃▁▃▃▄▂▄117.94699.093122.43113.972121.426113.517111.525121.448101.04683.303115.104103.51289.23586.599107.30494.39184.19570.47177.73586.57669.49975.26194.64274.25370.51154.91472.48476.00282.88665.73185.708
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-31
us-gaap:NetCashProvidedByUsedInFinancingActivities ▁█▂▂▂▂▂▂▂▂▂▂▂▂▂▂▂▂▂▂▂▂▂▂▂▂▂▂▂▂▂-459.8172457.38685.19861.8825.27-76.33697.60475.559-26.403-37.64393.07166.551-119.394-106.562163.44872.877-41.349-93.28387.74822.715-16.275-54.946-0.568-15.645-37.567-55.61728.087-13.951-14.03259.108107.83
us-gaap:PaymentsOfDividends ██▇▇▇▇▇▇▇▇▆▆▆▆▆▆▆▆▅▅▅▅▅▅▅▅▄▄▄▁▁30.90330.88228.67428.60828.54728.54326.36926.36826.34426.34324.16224.1624.13524.13721.95521.95422.00822.03418.28618.28518.25818.3815.64815.64515.7615.77314.57514.56814.5530.00.0
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-31
 us-gaap:DebtInstrumentInterestRateStatedPercentage us-gaap:LongtermDebtType ogs:NotePayableDue2024NANANA3.6099999999999997e-063.61e-083.61e-083.61e-083.61e-083.61e-083.61e-083.61e-083.61e-083.61e-083.61e-083.61e-083.61e-083.61e-083.61e-083.61e-083.61e-083.61e-083.61e-083.61e-083.61e-083.61e-083.61e-08NANANANANA
 us-gaap:DebtInstrumentInterestRateStatedPercentage us-gaap:LongtermDebtType ogs:NotePayableDue2030MemberDomainNANANA2e-062e-08NANANANANANANANANANANANANANANANANANANANANANANANANANA
 us-gaap:DebtInstrumentInterestRateStatedPercentage us-gaap:LongtermDebtType ogs:NotePayableDue2048NANANA4.5e-064.5e-084.5e-084.5e-084.5e-084.5e-084.5e-084.5e-08NANANANANANANANANANANANANANANANANANANANA
 us-gaap:DebtInstrumentInterestRateStatedPercentage us-gaap:LongtermDebtType ogs:NotesPayableDue2044NANANA4.658e-064.6580000000000004e-084.6580000000000004e-084.6580000000000004e-084.6580000000000004e-084.6580000000000004e-084.6580000000000004e-084.6580000000000004e-084.6580000000000004e-084.6580000000000004e-084.6580000000000004e-084.6580000000000004e-084.6580000000000004e-084.6580000000000004e-084.6580000000000004e-084.6580000000000004e-084.6580000000000004e-084.6580000000000004e-084.6580000000000004e-084.6580000000000004e-084.6580000000000004e-084.6580000000000004e-084.6580000000000004e-08NANANANANA

Common Stock Value

us-gaap:CommonStockValue

us-gaap:CommonStockValue


Common
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-31
Value535000.0532000.0532000.0531000.0529000.0529000.0528000.0527000.0527000.0527000.0526000.0526000.0526000.0526000.0526000.0526000.0526000.0526000.0526000.0526000.0526000.0526000.0526000.0526000.0526000.0526000.0521000.0520000.0520000.0520000.00
Percentage of CommonStockValue100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0
Percentage of Assets0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

Preferred Stock Par Or Stated Value Per Share

us-gaap:PreferredStockParOrStatedValuePerShare

us-gaap:PreferredStockParOrStatedValuePerShare


Preferred
Period End2020-12-31
Value0.01
Percentage of PreferredStockParOrStatedValuePerShare100.0

Shares Issued

us-gaap:SharesIssued us-gaap:StatementEquityComponents

us-gaap:SharesIssued

us-gaap:CommonStock


Shares
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-31
Value535252525252520.00010.00.0
Percentage of SharesIssued100.0100.0100.0100.0100.0100.0100.0100.00.00.0

Common Stock Shares Issued

us-gaap:CommonStockSharesIssued

us-gaap:CommonStockSharesIssued


Common
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312014-01-312013-12-31
Value535353535252525252525252525252525252525252525252525252525151510.0001
Percentage of CommonStockSharesIssued100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:CommonStockSharesIssued us-gaap:StatementEquityComponents

us-gaap:CommonStock


Common
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-31
Value5353535352525252525252525252525252525252525252525252525251510.0001
Percentage of CommonStockSharesIssued100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Common Stock Shares Authorized

us-gaap:CommonStockSharesAuthorized

us-gaap:CommonStockSharesAuthorized


Common
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312014-01-312013-12-31
Value2502502502502502502502502502502502502502502502502502502502502502502502502502502502502502502500.001
Percentage of CommonStockSharesAuthorized100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Common Stock Shares Outstanding

us-gaap:CommonStockSharesOutstanding

us-gaap:CommonStockSharesOutstanding


Common
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-31
Value5353535352525252525252525252525252525252525252525252525251510.0001
Percentage of CommonStockSharesOutstanding100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Weighted Average Number Of Diluted Shares Outstanding

us-gaap:WeightedAverageNumberOfDilutedSharesOutstanding

us-gaap:WeightedAverageNumberOfDilutedSharesOutstanding


Weighted
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-312017-09-302017-06-302017-03-312016-09-302016-06-302016-03-312015-09-302015-06-302015-03-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-31
Value5353535353535353535252525253525253535353535252525252
Percentage of WeightedAverageNumberOfDilutedSharesOutstanding100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Weighted Average Number Of Shares Outstanding Basic

us-gaap:WeightedAverageNumberOfSharesOutstandingBasic

us-gaap:WeightedAverageNumberOfSharesOutstandingBasic


Weighted
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-312017-09-302017-06-302017-03-312016-09-302016-06-302016-03-312015-09-302015-06-302015-03-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-31
Value5353535353525252525252525252525252525252525152525252
Percentage of WeightedAverageNumberOfSharesOutstandingBasic100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Earnings Per Share Basic

us-gaap:EarningsPerShareBasic

us-gaap:EarningsPerShareBasic


Earnings
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-31
Value0.561.791.10.40.481.730.970.330.461.770.850.310.391.730.90.360.391.450.810.240.391.230.750.140.231.150.70.090.181.130.580.010.291.02
Percentage of EarningsPerShareBasic100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Earnings Per Share Diluted

us-gaap:EarningsPerShareDiluted

us-gaap:EarningsPerShareDiluted


Earnings
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-31
Value0.561.791.090.390.481.720.960.330.461.760.840.310.391.720.890.360.391.440.80.240.381.220.740.140.231.130.690.090.181.130.580.010.291.02
Percentage of EarningsPerShareDiluted100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Comprehensive Income Net Of Tax

us-gaap:ComprehensiveIncomeNetOfTax

us-gaap:ComprehensiveIncomeNetOfTax


Comprehensive
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-31
Value30955621259149172493451620904518207641122064397.5121260344.5751255300.4341453
Percentage of ComprehensiveIncomeNetOfTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Revenues0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

Cost Of Goods And Services Sold

us-gaap:CostOfGoodsAndServicesSold

us-gaap:CostOfGoodsAndServicesSold


Cost
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-31
Value9331440622264982365
Percentage of CostOfGoodsAndServicesSold100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Revenues0.00.00.00.00.00.00.00.0

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

us-gaap:IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest

us-gaap:IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest


Income
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-31
Value3611469253111165213011261212611578293311467203210462121998597.3151595490.3092487
Percentage of IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Revenues0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

Income Tax Expense Benefit

us-gaap:IncomeTaxExpenseBenefit

us-gaap:IncomeTaxExpenseBenefit


Income
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-31
Value6.46418114.2565.83420134.146.15718165.6716.4272431111238247.91240224.6297.57437222.6625.9173619-0.1259.1533
Percentage of IncomeTaxExpenseBenefit100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Revenues0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

Interest Expense

us-gaap:InterestExpense

us-gaap:InterestExpense


Interest
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-31
Value14151515151515151515141212121111111111101010101111119.95611111215151515
Percentage of InterestExpense100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Revenues0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

Net Income Loss

us-gaap:NetIncomeLoss

us-gaap:NetIncomeLoss


Net
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-31
Value30955821259151172493441620904718207642122064397.3711260364.6539.45459300.4341453
Percentage of NetIncomeLoss100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Revenues0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:NetIncomeLoss us-gaap:StatementEquityComponents

us-gaap:RetainedEarnings


Net
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-31
Value3095212591172493441620904718207642122064397.3711260364.6539.45433
Percentage of NetIncomeLoss100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.056.7
Percentage of Revenues0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0
Percentage of Revenues us-gaap:RetainedEarnings0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

Operating Income Loss

us-gaap:OperatingIncomeLoss

us-gaap:OperatingIncomeLoss


Operating
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-31
Value51130854044133813846127803641130894044125783043116732431109701926109651439101
Percentage of OperatingIncomeLoss100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Revenues0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

Other Comprehensive Income Loss Net Of Tax

us-gaap:OtherComprehensiveIncomeLossNetOfTax

us-gaap:OtherComprehensiveIncomeLossNetOfTax


Other
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-31
Value299000.0300000.0-1708000.0223000.0223000.0224000.0-1915000.0160000.0160000.0160000.01081000.0203000.0203000.0-80000.0-1164000.0128000.0129000.0129000.0-661000.0116000.0115000.0116000.0350000.0141000.0142000.0140000.0-1625000.0-78000.03315000.0-3393000.00000
Percentage of OtherComprehensiveIncomeLossNetOfTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.00.00.00.0
Percentage of Revenues0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:OtherComprehensiveIncomeLossNetOfTax us-gaap:StatementEquityComponents

us-gaap:AccumulatedOtherComprehensiveIncome


Other
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-30
Value299000.0300000.0223000.0223000.0224000.0160000.0160000.0160000.01081000.0203000.0203000.0-80000.0-1164000.0128000.0129000.0129000.0-661000.0116000.0115000.0116000.0350000.0141000.0142000.0140000.0-1625000.0-78000.0
Percentage of OtherComprehensiveIncomeLossNetOfTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Revenues0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0
Percentage of Revenues us-gaap:AccumulatedOtherComprehensiveIncome0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

Other Nonoperating Income Expense

us-gaap:OtherNonoperatingIncomeExpense

us-gaap:OtherNonoperatingIncomeExpense


Other
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value451000.0-405000.0176000.0198000.02394000.0-5788000.0-1143000.0-1397000.0-865000.0429000.0-5072000.0-1929000.0-2194000.0-2164000.0-3503000.0-3715000.0-3900000.0-3407000.0
Percentage of OtherNonoperatingIncomeExpense100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Revenues0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:OtherNonoperatingIncomeExpense ogs:OTHERINCOMEANDOTHEREXPENSE

ogs:Netperiodiccostotherthanservicecost


Other
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-312017-09-302017-06-302017-03-31
Value-1005000.0-770000.0-1310000.0-1253000.0-1123000.0-1364000.0-1469000.0-1599000.0-2336000.0-2403000.0-1734000.0-4313000.0-4313000.0-4313000.0
Percentage of OtherNonoperatingIncomeExpense-222.8190.1-661.6-52.319.497.6169.8-372.7121.1109.580.1116.1110.6126.6
Percentage of Revenues0.00.00.00.00.00.00.00.00.00.00.00.00.00.0
Percentage of Revenues ogs:Netperiodiccostotherthanservicecost0.00.00.00.00.00.00.00.00.00.00.00.00.00.0

ogs:Othernet


Other
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-312017-09-302017-06-302017-03-31
Value-427000.0252000.0-312000.0-300000.0-406000.0-33000.0604000.02028000.0407000.0209000.0-430000.0598000.0413000.0906000.0
Percentage of OtherNonoperatingIncomeExpense-94.7-62.2-157.6-12.57.02.4-69.8472.7-21.1-9.519.9-16.1-10.6-26.6
Percentage of Revenues0.00.00.00.00.00.00.00.00.00.00.00.00.00.0
Percentage of Revenues ogs:Othernet0.00.00.00.00.00.00.00.00.00.00.00.00.00.0

Regulated Operating Revenue

us-gaap:RegulatedOperatingRevenue

us-gaap:RegulatedOperatingRevenue


Regulated
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-09-302017-06-302017-03-31
Value315625484244273528452248290661464238292638247279550
Percentage of RegulatedOperatingRevenue100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Revenues0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

Assets

us-gaap:Assets

us-gaap:Assets


Assets
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-31
Value8183867960285763568156745708553354465524546851525067515952064971487348894942469346104598464445064525460546494264428343821e-06
Percentage of Assets100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Liabilities And Stockholders Equity

us-gaap:LiabilitiesAndStockholdersEquity

us-gaap:LiabilitiesAndStockholdersEquity


Liabilities
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-31
Value8183867960285763568156745708553354465524546851525067515952064971487348894942469346104598464445064525460546494264428343823846
Percentage of LiabilitiesAndStockholdersEquity100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0384647500000.0

Stockholders Equity

us-gaap:StockholdersEquity

us-gaap:StockholdersEquity


Stockholders
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312012-12-312011-12-31
Value2317229622332200219121892129210121082104204220162022202019601931193319441888186218751867184118101818183917941770178017821e-0611541158
Percentage of StockholdersEquity100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets28.326.537.038.238.638.637.338.038.738.137.439.139.939.237.638.939.739.838.239.740.740.639.740.240.239.938.641.541.640.7100.00.00.0

us-gaap:StockholdersEquity us-gaap:StatementEquityComponents

us-gaap:AccumulatedOtherComprehensiveIncome


Stockholders
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312014-12-312013-12-312012-12-312011-12-31
Value-7.178-7.477-7.777-6.069-6.292-6.515-6.739-4.824-4.984-5.144-4.086-5.167-5.37-5.573-5.493-4.329-4.457-4.586-4.715-4.054-4.17-4.285-4.401-5.1740.00.00.0
Percentage of StockholdersEquity-0.3-0.3-0.3-0.3-0.3-0.3-0.3-0.2-0.2-0.2-0.2-0.3-0.3-0.3-0.3-0.2-0.2-0.2-0.2-0.2-0.2-0.2-0.2-0.30.00.00.0
Percentage of Assets-0.1-0.1-0.1-0.1-0.1-0.1-0.1-0.1-0.1-0.1-0.1-0.1-0.1-0.1-0.1-0.1-0.1-0.1-0.1-0.1-0.1-0.1-0.1-0.10.00.00.0
Percentage of Assets us-gaap:AccumulatedOtherComprehensiveIncome0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:AdditionalPaidInCapital


Stockholders
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312014-12-312013-12-312012-12-312011-12-31
Value1776175517561751173517291733172817251720172717251723172117371735173417321749174817561754176417580.00.00.0
Percentage of StockholdersEquity76.776.478.779.679.279.081.482.281.981.784.685.685.285.288.689.889.789.192.793.993.794.095.898.00.00.00.0
Percentage of Assets21.720.229.130.430.630.530.431.231.731.131.633.534.033.433.434.935.635.435.437.338.138.238.037.80.00.00.0
Percentage of Assets us-gaap:AdditionalPaidInCapital0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:CommonStock


Stockholders
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312014-12-312013-12-312012-12-312011-12-31
Value0.5350.5320.5320.5310.5290.5290.5280.5270.5270.5270.5260.5260.5260.5260.5260.5260.5260.5260.5260.5260.5260.5260.5260.5210.00.00.0
Percentage of StockholdersEquity0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0
Percentage of Assets0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0
Percentage of Assets us-gaap:CommonStock0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:RetainedEarnings


Stockholders
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312014-12-312013-12-312012-12-312011-12-31
Value54654848345446146540237738738932030030831224622122422616113714214195390.00.00.0
Percentage of StockholdersEquity23.623.921.720.621.121.318.918.018.418.515.714.915.315.512.611.411.611.68.57.47.67.65.22.20.00.00.0
Percentage of Assets6.76.38.07.98.18.27.16.87.17.05.95.86.16.14.74.44.64.63.32.93.13.12.00.90.00.00.0
Percentage of Assets us-gaap:RetainedEarnings0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

Assets Current

us-gaap:AssetsCurrent

us-gaap:AssetsCurrent


Assets
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-31
Value6031158539369347407506389376516543374350501588445411481568377381417482417477604667505570724602
Percentage of AssetsCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets7.413.39.06.46.17.28.97.06.99.39.97.36.99.711.39.08.49.811.58.08.39.110.49.310.613.114.411.813.316.560218400000.0

Cash And Cash Equivalents At Carrying Value

us-gaap:CashAndCashEquivalentsAtCarryingValue

us-gaap:CashAndCashEquivalentsAtCarryingValue


Cash
Period End2020-12-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312011-12-31
Value7.9931712111921121244146.8725.11313144.51354522.4335213514211591611781e-062.6823.7946.4124.044.475
Percentage of CashAndCashEquivalentsAtCarryingValue100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets0.10.30.20.20.40.40.20.20.90.30.10.10.30.30.11.21.10.11.23.03.10.31.43.84.1100.00.00.00.00.00.0

Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents

us-gaap:CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents

us-gaap:CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents


Cash
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-31
Value2097047.9936.18410111712111921
Percentage of CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets2.68.10.10.10.20.20.30.20.20.40.4

Receivables Net Current

us-gaap:ReceivablesNetCurrent

us-gaap:ReceivablesNetCurrent


Receivables
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-31
Value160279292106138234260130169338295132163303298127152249290105115195216103142308326135192398356
Percentage of ReceivablesNetCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets2.03.24.91.92.44.14.62.43.16.15.42.63.25.95.72.63.15.15.92.22.54.24.72.33.26.77.03.24.59.135698800000.0

Other Assets Current

us-gaap:OtherAssetsCurrent

us-gaap:OtherAssetsCurrent


Other
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-31
Value45343524232120161821201318181715201819122016161213434940333554
Percentage of OtherAssetsCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets0.60.40.60.40.40.40.40.30.30.40.40.30.40.40.30.30.40.40.40.30.40.40.40.30.31.01.11.00.80.85424000000.0

Operating Lease Right Of Use Asset

us-gaap:OperatingLeaseRightOfUseAsset

us-gaap:OperatingLeaseRightOfUseAsset


Operating
Period End2020-12-312019-12-312019-09-302019-06-302019-03-312018-12-31
Value373435373832
Percentage of OperatingLeaseRightOfUseAsset100.0100.0100.0100.0100.0100.0
Percentage of Assets0.60.60.60.70.70.6

Other Assets Noncurrent

us-gaap:OtherAssetsNoncurrent

us-gaap:OtherAssetsNoncurrent


Other
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-31
Value1011059692959387808688464948484743474643474943555457525152575417
Percentage of OtherAssetsNoncurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets1.21.21.61.61.71.71.51.51.61.60.81.00.90.90.90.91.01.00.91.01.10.91.21.21.31.11.11.21.31.21765800000.0

Accounts Payable Current

us-gaap:AccountsPayableCurrent

us-gaap:AccountsPayableCurrent


Accounts
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-31
Value1582271526562821206267119174687077143686076131705959107576710515997100175169
Percentage of AccountsPayableCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets1.92.62.51.11.11.42.11.11.22.23.21.31.41.52.81.41.21.62.71.51.31.32.31.31.52.33.42.32.34.016950000000.0

Accrued Liabilities Current

us-gaap:AccruedLiabilitiesCurrent

us-gaap:AccruedLiabilitiesCurrent


Accrued
Period End2021-06-302020-12-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302013-12-31
Value21363023201230181612221715153118141326204.791
Percentage of AccruedLiabilitiesCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets0.30.60.60.50.40.20.60.40.30.30.50.40.30.30.70.40.30.30.60.5479100000.0

Liabilities Current

us-gaap:LiabilitiesCurrent

us-gaap:LiabilitiesCurrent


Liabilities
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-31
Value369879797575490776872677578658698836749844673392292307443258217228304233246300392274268363769
Percentage of LiabilitiesCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets4.510.113.210.08.613.715.312.210.611.912.816.214.816.412.97.96.06.39.05.54.75.06.65.25.56.58.46.46.38.376907700000.0

Operating Lease Liability Current

us-gaap:OperatingLeaseLiabilityCurrent

us-gaap:OperatingLeaseLiabilityCurrent


Operating
Period End2020-12-31
Value7000000.0
Percentage of OperatingLeaseLiabilityCurrent100.0
Percentage of Assets0.1

Other Liabilities Current

us-gaap:OtherLiabilitiesCurrent

us-gaap:OtherLiabilitiesCurrent


Other
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-31
Value28577868728084667573187.8581010211923269.4518.2121025111014182821345442
Percentage of OtherLiabilitiesCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets0.30.71.31.21.31.41.51.21.41.30.30.20.20.20.40.40.50.50.20.20.20.60.30.20.30.40.60.50.81.24242200000.0

Long Term Debt

us-gaap:LongTermDebt

us-gaap:LongTermDebt


Long
Period End2021-06-302021-03-312020-12-312020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302014-12-312013-12-31
Value4099409913001600130013001300130013001300120012001200120012001200120012001200120012001200120012001000
Percentage of LongTermDebt100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets50.147.221.628.222.922.823.523.923.523.823.323.723.323.024.624.524.325.626.026.125.826.626.525.8100000000000.0

Long Term Debt Noncurrent

us-gaap:LongTermDebtNoncurrent

us-gaap:LongTermDebtNoncurrent


Long
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-31
Value4082408215821582158112861286128512851285128589389389311931193119211921192119211921191120112011201120112011201120112011.318
Percentage of LongTermDebtNoncurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets49.947.026.227.527.822.722.523.223.623.323.517.317.617.322.924.024.524.424.125.425.925.925.926.726.526.125.828.228.027.4131800000.0

Deferred Tax Liabilities Noncurrent

us-gaap:DeferredTaxLiabilitiesNoncurrent

us-gaap:DeferredTaxLiabilitiesNoncurrent


Deferred
Period End2020-12-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-31
Value65668267567366665263462862559910891077106510381011987967951907900897894835834831743
Percentage of DeferredTaxLiabilitiesNoncurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets10.912.012.212.412.111.912.312.412.111.521.922.121.821.021.621.421.120.520.119.919.519.219.619.519.074345200000.0

Deferred Income Tax Liabilities Net

us-gaap:DeferredIncomeTaxLiabilitiesNet

us-gaap:DeferredIncomeTaxLiabilitiesNet


Deferred
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-31
Value670685656642637698682
Percentage of DeferredIncomeTaxLiabilitiesNet100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets8.27.910.911.111.212.312.0

Pension And Other Postretirement Defined Benefit Plans Liabilities Noncurrent

us-gaap:PensionAndOtherPostretirementDefinedBenefitPlansLiabilitiesNoncurrent

us-gaap:PensionAndOtherPostretirementDefinedBenefitPlansLiabilitiesNoncurrent


Pension
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312013-12-31
Value828997981041091151641681731781551601661722822963003032912632682722742772862870.0
Percentage of PensionAndOtherPostretirementDefinedBenefitPlansLiabilitiesNoncurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0
Percentage of Assets1.01.01.61.71.81.92.03.03.13.13.33.03.23.23.35.76.16.16.16.25.75.85.96.16.16.26.20.0

us-gaap:PensionAndOtherPostretirementDefinedBenefitPlansLiabilitiesNoncurrent us-gaap:RetirementPlanType

us-gaap:OtherPostretirementBenefitPlansDefinedBenefit


Pension
Period End2020-12-312019-12-312018-12-312017-12-31
Value8.635234364
Percentage of PensionAndOtherPostretirementDefinedBenefitPlansLiabilitiesNoncurrent8.820.224.237.5
Percentage of Assets0.10.40.81.2
Percentage of Assets us-gaap:OtherPostretirementBenefitPlansDefinedBenefit0.00.00.00.0

us-gaap:PensionPlansDefinedBenefit


Pension
Period End2020-12-312019-12-312018-12-312017-12-31
Value8992135108
Percentage of PensionAndOtherPostretirementDefinedBenefitPlansLiabilitiesNoncurrent91.279.875.862.5
Percentage of Assets1.51.62.52.1
Percentage of Assets us-gaap:PensionPlansDefinedBenefit0.00.00.00.0

Other Liabilities Noncurrent

us-gaap:OtherLiabilitiesNoncurrent

us-gaap:OtherLiabilitiesNoncurrent


Other
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-31
Value102108113110116120118120122124899491898781797976777374737880807918319920265
Percentage of OtherLiabilitiesNoncurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets1.31.31.91.92.12.12.12.22.32.21.61.81.81.71.71.61.61.61.51.61.61.61.61.81.81.71.74.34.74.66597400000.0

Operating Lease Liability Noncurrent

us-gaap:OperatingLeaseLiabilityNoncurrent

us-gaap:OperatingLeaseLiabilityNoncurrent


Operating
Period End2020-12-31
Value30
Percentage of OperatingLeaseLiabilityNoncurrent100.0
Percentage of Assets0.5

Lessee Operating Lease Liability Payments Due Year Two

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearTwo

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearTwo


Lessee
Period End2020-12-31
Value7400000.0
Percentage of LesseeOperatingLeaseLiabilityPaymentsDueYearTwo100.0
Percentage of Assets0.1

Lessee Operating Lease Liability Payments Due Year Three

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearThree

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearThree


Lessee
Period End2020-12-31
Value6200000.0
Percentage of LesseeOperatingLeaseLiabilityPaymentsDueYearThree100.0
Percentage of Assets0.1

Lessee Operating Lease Liability Payments Due Year Four

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearFour

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearFour


Lessee
Period End2020-12-31
Value4700000.0
Percentage of LesseeOperatingLeaseLiabilityPaymentsDueYearFour100.0
Percentage of Assets0.1

Lessee Operating Lease Liability Payments Due Year Five

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearFive

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearFive


Lessee
Period End2020-12-31
Value4100000.0
Percentage of LesseeOperatingLeaseLiabilityPaymentsDueYearFive100.0
Percentage of Assets0.1

Lessee Operating Lease Liability Payments Due After Year Five

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueAfterYearFive

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueAfterYearFive


Lessee
Period End2020-12-31
Value11
Percentage of LesseeOperatingLeaseLiabilityPaymentsDueAfterYearFive100.0
Percentage of Assets0.2

Operating Lease Liability

us-gaap:OperatingLeaseLiability

us-gaap:OperatingLeaseLiability


Operating
Period End2020-12-312019-12-312019-09-302019-06-302019-03-312018-12-31
Value373435373832
Percentage of OperatingLeaseLiability100.0100.0100.0100.0100.0100.0
Percentage of Assets0.60.60.60.70.70.6

Lessee Operating Lease Liability Payments Due

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDue

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDue


Lessee
Period End2020-12-31
Value41
Percentage of LesseeOperatingLeaseLiabilityPaymentsDue100.0
Percentage of Assets0.7

Lessee Operating Lease Liability Undiscounted Excess Amount

us-gaap:LesseeOperatingLeaseLiabilityUndiscountedExcessAmount

us-gaap:LesseeOperatingLeaseLiabilityUndiscountedExcessAmount


Lessee
Period End2020-12-31
Value3500000.0
Percentage of LesseeOperatingLeaseLiabilityUndiscountedExcessAmount100.0
Percentage of Assets0.1

Stockholders Equity

us-gaap:StockholdersEquity

us-gaap:StockholdersEquity


Stockholders
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312012-12-312011-12-31
Value2317229622332200219121892129210121082104204220162022202019601931193319441888186218751867184118101818183917941770178017821e-0611541158
Percentage of StockholdersEquity100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets28.326.537.038.238.638.637.338.038.738.137.439.139.939.237.638.939.739.838.239.740.740.639.740.240.239.938.641.541.640.7100.00.00.0

us-gaap:StockholdersEquity us-gaap:StatementEquityComponents

us-gaap:AccumulatedOtherComprehensiveIncome


Stockholders
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312014-12-312013-12-312012-12-312011-12-31
Value-7.178-7.477-7.777-6.069-6.292-6.515-6.739-4.824-4.984-5.144-4.086-5.167-5.37-5.573-5.493-4.329-4.457-4.586-4.715-4.054-4.17-4.285-4.401-5.1740.00.00.0
Percentage of StockholdersEquity-0.3-0.3-0.3-0.3-0.3-0.3-0.3-0.2-0.2-0.2-0.2-0.3-0.3-0.3-0.3-0.2-0.2-0.2-0.2-0.2-0.2-0.2-0.2-0.30.00.00.0
Percentage of Assets-0.1-0.1-0.1-0.1-0.1-0.1-0.1-0.1-0.1-0.1-0.1-0.1-0.1-0.1-0.1-0.1-0.1-0.1-0.1-0.1-0.1-0.1-0.1-0.10.00.00.0
Percentage of Assets us-gaap:AccumulatedOtherComprehensiveIncome0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:AdditionalPaidInCapital


Stockholders
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312014-12-312013-12-312012-12-312011-12-31
Value1776175517561751173517291733172817251720172717251723172117371735173417321749174817561754176417580.00.00.0
Percentage of StockholdersEquity76.776.478.779.679.279.081.482.281.981.784.685.685.285.288.689.889.789.192.793.993.794.095.898.00.00.00.0
Percentage of Assets21.720.229.130.430.630.530.431.231.731.131.633.534.033.433.434.935.635.435.437.338.138.238.037.80.00.00.0
Percentage of Assets us-gaap:AdditionalPaidInCapital0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:CommonStock


Stockholders
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312014-12-312013-12-312012-12-312011-12-31
Value0.5350.5320.5320.5310.5290.5290.5280.5270.5270.5270.5260.5260.5260.5260.5260.5260.5260.5260.5260.5260.5260.5260.5260.5210.00.00.0
Percentage of StockholdersEquity0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0
Percentage of Assets0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0
Percentage of Assets us-gaap:CommonStock0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:RetainedEarnings


Stockholders
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312014-12-312013-12-312012-12-312011-12-31
Value54654848345446146540237738738932030030831224622122422616113714214195390.00.00.0
Percentage of StockholdersEquity23.623.921.720.621.121.318.918.018.418.515.714.915.315.512.611.411.611.68.57.47.67.65.22.20.00.00.0
Percentage of Assets6.76.38.07.98.18.27.16.87.17.05.95.86.16.14.74.44.64.63.32.93.13.12.00.90.00.00.0
Percentage of Assets us-gaap:RetainedEarnings0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

Common Stock Value

us-gaap:CommonStockValue

us-gaap:CommonStockValue


Common
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-31
Value535000.0532000.0532000.0531000.0529000.0529000.0528000.0527000.0527000.0527000.0526000.0526000.0526000.0526000.0526000.0526000.0526000.0526000.0526000.0526000.0526000.0526000.0526000.0526000.0526000.0526000.0521000.0520000.0520000.0520000.00
Percentage of CommonStockValue100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0
Percentage of Assets0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

Additional Paid In Capital

us-gaap:AdditionalPaidInCapital

us-gaap:AdditionalPaidInCapital


Additional
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-31
Value1776175517561751173517291733172817251720172717251723172117371735173417321749174817561754176417621764175917581755175417520.0
Percentage of AdditionalPaidInCapital100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0
Percentage of Assets21.720.229.130.430.630.530.431.231.731.131.633.534.033.433.434.935.635.435.437.338.138.238.039.139.038.237.841.241.040.00.0

Retained Earnings Accumulated Deficit

us-gaap:RetainedEarningsAccumulatedDeficit

us-gaap:RetainedEarningsAccumulatedDeficit


Retained
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-31
Value54654848345446146540237738738932030030831224622122422616113714214195718084391828330.0
Percentage of RetainedEarningsAccumulatedDeficit100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0
Percentage of Assets6.76.38.07.98.18.27.16.87.17.05.95.86.16.14.74.44.64.63.32.93.13.12.01.61.81.80.90.40.70.80.0

Accumulated Other Comprehensive Income Loss Net Of Tax

us-gaap:AccumulatedOtherComprehensiveIncomeLossNetOfTax

us-gaap:AccumulatedOtherComprehensiveIncomeLossNetOfTax


Accumulated
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-31
Value-7.178-7.477-7.777-6.069-6.292-6.515-6.739-4.824-4.984-5.144-4.086-5.167-5.37-5.573-5.493-4.329-4.457-4.586-4.715-4.054-4.17-4.285-4.401-4.751-4.892-5.034-5.174-3.549-3.471-3.3930.0
Percentage of AccumulatedOtherComprehensiveIncomeLossNetOfTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0
Percentage of Assets-0.1-0.1-0.1-0.1-0.1-0.1-0.1-0.1-0.1-0.1-0.1-0.1-0.1-0.1-0.1-0.1-0.1-0.1-0.1-0.1-0.1-0.1-0.1-0.1-0.1-0.1-0.1-0.1-0.1-0.10.0

Stock Issued During Period Value New Issues

us-gaap:StockIssuedDuringPeriodValueNewIssues

us-gaap:StockIssuedDuringPeriodValueNewIssues


Stock
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-31
Value21-1.705155.974-3.7362.1695.397-5.3534.4091.9614.909-5.8794.2171.7255.017-6.7662.569-7.8126.2433.2196.730.1616.8920.882.6342.6392.5311.811
Percentage of StockIssuedDuringPeriodValueNewIssues100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:StockIssuedDuringPeriodValueNewIssues us-gaap:StatementEquityComponents

us-gaap:AdditionalPaidInCapital


Stock
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-31
Value21-1.705155.974-3.7372.1695.397-7.4991.9111.3451.867-16.0741.6851.3271.508-17.4690.381-8.0611.673-10.2052.113-1.9153.9540.8752.6332.6392.5311.811
Percentage of StockIssuedDuringPeriodValueNewIssues100.0100.0100.0100.0100.0100.0100.0140.143.368.638.0273.440.076.930.1258.214.8103.226.8-317.031.4-1189.457.499.4100.0100.0100.0100.0
Percentage of Assets0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0
Percentage of Assets us-gaap:AdditionalPaidInCapital0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:CommonStock


Stock
Period End2021-06-302020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-31
Value0.0030.0020.00.0010.00.00.0010.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0050.0010.00.00.0
Percentage of StockIssuedDuringPeriodValueNewIssues0.00.00.0-0.00.00.0-0.00.00.00.0-0.00.00.00.0-0.00.0-0.00.00.00.00.00.00.60.00.00.00.0
Percentage of Assets0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0
Percentage of Assets us-gaap:CommonStock0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

Net Cash Provided By Used In Operating Activities

us-gaap:NetCashProvidedByUsedInOperatingActivities

us-gaap:NetCashProvidedByUsedInOperatingActivities


Net
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-31
Value81-1659.26539469518221471181223036176223-48.604231171620.1371487180446.986101241-3.345-11.68879182-21.916-48.88567157
Percentage of NetCashProvidedByUsedInOperatingActivities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Revenues0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

Net Cash Provided By Used In Investing Activities

us-gaap:NetCashProvidedByUsedInInvestingActivities

us-gaap:NetCashProvidedByUsedInInvestingActivities


Net
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-31
Value-117940000.0-101200000.0-122560000.0-112790000.0-121840000.0-113180000.0-114120000.0-121480000.0-100990000.0-86343000.0-115100000.0-103510000.0-89235000.0-86599000.0-107300000.0-94251000.0-83779000.0-70410000.0-77735000.0-86576000.0-69399000.0-74869000.0-94642000.0-74253000.0-70511000.0-54914000.0-72484000.0-76002000.0-82886000.0-65731000.0-85425000.0-78383000.0-66812000.0-60133000.0
Percentage of NetCashProvidedByUsedInInvestingActivities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Revenues0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

Net Cash Provided By Used In Financing Activities

us-gaap:NetCashProvidedByUsedInFinancingActivities

us-gaap:NetCashProvidedByUsedInFinancingActivities


Net
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-31
Value-459.8172457856125-76.3369775-26.403-37.6439366-119.394-106.56216372-41.349-93.2838722-16.275-54.946-0.568-15.645-37.567-55.61728-13.951-14.03259107126-3.12-95.19
Percentage of NetCashProvidedByUsedInFinancingActivities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Revenues0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Including Exchange Rate Effect

us-gaap:CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect

us-gaap:CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect


Cash
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-31
Value-495.841696-4.27-0.615-6.7841.448-8.514-1.695
Percentage of CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Revenues0.00.00.00.00.00.00.00.0

Deferred Income Tax Expense Benefit

us-gaap:DeferredIncomeTaxExpenseBenefit

us-gaap:DeferredIncomeTaxExpenseBenefit


Deferred
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-31
Value6.387187.311.3962.9236.8564.208-0.3024.5734.828166.0916.469243111123727231916446.2322.69210470.9481.7280.15219-0.1429.11733
Percentage of DeferredIncomeTaxExpenseBenefit100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Increase Decrease In Accounts Payable

us-gaap:IncreaseDecreaseInAccountsPayable

us-gaap:IncreaseDecreaseInAccountsPayable


Increase
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-31
Value-73.68387790.072-16.693-34.22754-4.325-56.168-53.1721004.571-12.019-56.409673.009-15.035-53.957609.974-2.837-40.0645-12.577-38.594-53.77763-3.671-72.4836.09193-13.205-27.958-15.321
Percentage of IncreaseDecreaseInAccountsPayable100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Increase Decrease In Inventories

us-gaap:IncreaseDecreaseInInventories

us-gaap:IncreaseDecreaseInInventories


Increase
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-31
Value41-49.625-11.4313324-56.227-14.1913036-55.82-19.1864529-79.598-27.4874223-34.201-18.7984023-61.6-17.7594038-104.023-32.026570-84.474-33.9689574-72.859
Percentage of IncreaseDecreaseInInventories100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Increase Decrease In Other Operating Capital Net

us-gaap:IncreaseDecreaseInOtherOperatingCapitalNet

us-gaap:IncreaseDecreaseInOtherOperatingCapitalNet


Increase
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-31
Value-21.687.801119.748-13.6314.609-4.4912.824-12.2630.991-1.37110-3.5688.0359.327-3.447-45.9966.14730-14.999-9.3464.187-5.77917-25.161303.4786.601-6.152-9.86634-17.756
Percentage of IncreaseDecreaseInOtherOperatingCapitalNet100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Net Cash Provided By Used In Operating Activities

us-gaap:NetCashProvidedByUsedInOperatingActivities

us-gaap:NetCashProvidedByUsedInOperatingActivities


Net
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-31
Value81-1659.26539469518221471181223036176223-48.604231171620.1371487180446.986101241-3.345-11.68879182-21.916-48.88567157
Percentage of NetCashProvidedByUsedInOperatingActivities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Revenues0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

Net Income Loss

us-gaap:NetIncomeLoss

us-gaap:NetIncomeLoss


Net
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-31
Value30955821259151172493441620904718207642122064397.3711260364.6539.45459300.4341453
Percentage of NetIncomeLoss100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Revenues0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:NetIncomeLoss us-gaap:StatementEquityComponents

us-gaap:RetainedEarnings


Net
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-31
Value3095212591172493441620904718207642122064397.3711260364.6539.45433
Percentage of NetIncomeLoss100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.056.7
Percentage of Revenues0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0
Percentage of Revenues us-gaap:RetainedEarnings0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

Share Based Compensation

us-gaap:ShareBasedCompensation

us-gaap:ShareBasedCompensation


Share
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-31
Value3.0922.5872.3642.352.8282.2612.1612.2422.9571.9542.02.1152.1351.9451.9461.9792.532.4211.8781.893.354.1015.3240.1791.22.4841.9622.0021.8551.7940.00.00.00.0
Percentage of ShareBasedCompensation100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.00.00.00.0

Net Cash Provided By Used In Investing Activities

us-gaap:NetCashProvidedByUsedInInvestingActivities

us-gaap:NetCashProvidedByUsedInInvestingActivities


Net
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-31
Value-117940000.0-101200000.0-122560000.0-112790000.0-121840000.0-113180000.0-114120000.0-121480000.0-100990000.0-86343000.0-115100000.0-103510000.0-89235000.0-86599000.0-107300000.0-94251000.0-83779000.0-70410000.0-77735000.0-86576000.0-69399000.0-74869000.0-94642000.0-74253000.0-70511000.0-54914000.0-72484000.0-76002000.0-82886000.0-65731000.0-85425000.0-78383000.0-66812000.0-60133000.0
Percentage of NetCashProvidedByUsedInInvestingActivities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Revenues0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

Payments To Acquire Property Plant And Equipment

us-gaap:PaymentsToAcquirePropertyPlantAndEquipment

us-gaap:PaymentsToAcquirePropertyPlantAndEquipment


Payments
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-31
Value1179912211312111311112110183115103898610794847077866975947470547276826585766762
Percentage of PaymentsToAcquirePropertyPlantAndEquipment100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Net Cash Provided By Used In Financing Activities

us-gaap:NetCashProvidedByUsedInFinancingActivities

us-gaap:NetCashProvidedByUsedInFinancingActivities


Net
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-31
Value-459.8172457856125-76.3369775-26.403-37.6439366-119.394-106.56216372-41.349-93.2838722-16.275-54.946-0.568-15.645-37.567-55.61728-13.951-14.03259107126-3.12-95.19
Percentage of NetCashProvidedByUsedInFinancingActivities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Revenues0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

Payments Of Dividends

us-gaap:PaymentsOfDividends

us-gaap:PaymentsOfDividends


Payments
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-30
Value30302828282826262626242424242121222218181818151515151414140.00.00.0
Percentage of PaymentsOfDividends100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.00.00.0

Debt Instrument Interest Rate Stated Percentage

us-gaap:DebtInstrumentInterestRateStatedPercentage us-gaap:LongtermDebtType

us-gaap:DebtInstrumentInterestRateStatedPercentage

ogs:NotePayableDue2024


Debt
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-01-31
Value3.610.03610.03610.03610.03610.03610.03610.03610.03610.03610.03610.03610.03610.03610.03610.03610.03610.03610.03610.03610.03610.03610.03610.0361
Percentage of DebtInstrumentInterestRateStatedPercentage100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of LongTermDebtAndCapitalLeaseObligations0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0
Percentage of LongTermDebtAndCapitalLeaseObligations ogs:NotePayableDue20240.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

ogs:NotePayableDue2030MemberDomain


Debt
Period End2020-09-302020-06-30
Value2.00.02
Percentage of DebtInstrumentInterestRateStatedPercentage55.455.4
Percentage of LongTermDebtAndCapitalLeaseObligations0.00.0
Percentage of LongTermDebtAndCapitalLeaseObligations ogs:NotePayableDue2030MemberDomain0.00.0

ogs:NotePayableDue2048


Debt
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-31
Value4.50.0450.0450.0450.0450.0450.0450.045
Percentage of DebtInstrumentInterestRateStatedPercentage124.7124.7124.7124.7124.7124.7124.7124.7
Percentage of LongTermDebtAndCapitalLeaseObligations0.00.00.00.00.00.00.00.0
Percentage of LongTermDebtAndCapitalLeaseObligations ogs:NotePayableDue20480.00.00.00.00.00.00.00.0

ogs:NotesPayableDue2044


Debt
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-01-31
Value4.6580.046580.046580.046580.046580.046580.046580.046580.046580.046580.046580.046580.046580.046580.046580.046580.046580.046580.046580.046580.046580.046580.046580.04658
Percentage of DebtInstrumentInterestRateStatedPercentage129.0129.0129.0129.0129.0129.0129.0129.0129.0129.0129.0129.0129.0129.0129.0129.0129.0129.0129.0129.0129.0129.0129.0129.0
Percentage of LongTermDebtAndCapitalLeaseObligations0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0
Percentage of LongTermDebtAndCapitalLeaseObligations ogs:NotesPayableDue20440.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

Deferred Tax Liabilities

us-gaap:DeferredTaxLiabilities

us-gaap:DeferredTaxLiabilities


Deferred
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-31
Value6566826525991038951887709
Percentage of DeferredTaxLiabilities100.0100.0100.0100.0100.0100.0100.0100.0

ogs:ApproximateAggregateNaturalGasPurchaseCosts

ogs:ApproximateAggregateNaturalGasPurchaseCosts


Approximate
Period End2021-02-26
Value2200
Percentage of ApproximateAggregateNaturalGasPurchaseCosts100.0

ogs:CommonStockDividendsDeclaredAnnualizedBasis us-gaap:SubsequentEventType

ogs:CommonStockDividendsDeclaredAnnualizedBasis

us-gaap:SubsequentEvent


Common
Period End2021-09-302021-06-302021-03-312020-12-312020-03-312019-03-312018-03-312017-03-31
Value2.322.322.322.162.162.01.841.68
Percentage of CommonStockDividendsDeclaredAnnualizedBasis100.0100.0100.0100.0100.0100.0100.0100.0

ogs:EarningsonInvestmentsAssociatedwithNonqualifiedEmployeeBenefitPlans ogs:OTHERINCOMEANDOTHEREXPENSE

ogs:EarningsonInvestmentsAssociatedwithNonqualifiedEmployeeBenefitPlans

ogs:Earningslossesoninvestmentsassociatedwithnonqualifiedemployeebenefitplans


Earningson
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-31
Value1883000.0616000.01820000.03947000.0-4259000.0189000.01050000.02441000.0
Percentage of EarningsonInvestmentsAssociatedwithNonqualifiedEmployeeBenefitPlans100.0100.0100.0100.0100.0100.0100.0100.0

ogs:EnvironmentalReserveEstimateRangeHigh

ogs:EnvironmentalReserveEstimateRangeHigh


Environmental
Period End2020-12-312018-06-30
Value177.0
Percentage of EnvironmentalReserveEstimateRangeHigh100.0100.0

ogs:EnvironmentalReserveEstimateRangeLow

ogs:EnvironmentalReserveEstimateRangeLow


Environmental
Period End2020-12-312018-06-30
Value7100000.05600000.0
Percentage of EnvironmentalReserveEstimateRangeLow100.0100.0

ogs:IncreaseDecreaseInRegulatoryAssetsAndLiabilitiesCurrent

ogs:IncreaseDecreaseInRegulatoryAssetsAndLiabilitiesCurrent


Increase
Period End2021-06-302021-03-312020-06-302020-03-31
Value-6.88720-15.639-3.92
Percentage of IncreaseDecreaseInRegulatoryAssetsAndLiabilitiesCurrent100.0100.0100.0100.0

ogs:IncreaseDecreaseInRegulatoryAssetsAndLiabilitiesNonCurrent

ogs:IncreaseDecreaseInRegulatoryAssetsAndLiabilitiesNonCurrent


Increase
Period End2021-06-302021-03-312020-06-302020-03-31
Value-3877.858194624-8.852
Percentage of IncreaseDecreaseInRegulatoryAssetsAndLiabilitiesNonCurrent100.0100.0100.0100.0

ogs:OthercomprehensiveincomelossreclassificationRegulatoryadjustments

ogs:OthercomprehensiveincomelossreclassificationRegulatoryadjustments


Othercomprehensiveincomelossreclassification
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-31
Value-11.014-11.01372-10.296-10.296-10.29657-8.44-8.44-7.22266-9.537-9.5379.5379.2889.299.2899.29108.9438.948.9418.7281111117.4758.3662.84813
Percentage of OthercomprehensiveincomelossreclassificationRegulatoryadjustments100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

ogs:Othercomprehensiveincomelossreclassificationadjustmentbeforetaxandregulatoryadjustments

ogs:Othercomprehensiveincomelossreclassificationadjustmentbeforetaxandregulatoryadjustments


Othercomprehensiveincomelossreclassificationadjustmentbeforetaxandregulatoryadjustments
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-31
Value1111-74.157101010-60.5698.6538.6538.653-68.6579.8089.808-9.808-9.497-9.499-9.499-9.499-10.208-9.131-9.128-9.129-8.958-12.19-12.192-12.192-8.242-8.239-8.238-8.239
Percentage of Othercomprehensiveincomelossreclassificationadjustmentbeforetaxandregulatoryadjustments100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

ogs:Otherrevenuesnaturalgassalesrelated ogs:REVENUE

ogs:Otherrevenuesnaturalgassalesrelated

ogs:Otherrevenuesnaturalgassalesrelated


Otherrevenuesnaturalgassalesrelatedogs:
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-09-302017-06-30
Value1.325-1.0211.821-0.066-0.0036.547-2.6970.7350.207-2.944-3.1030.375-1.1081.030.573.377
Percentage of Otherrevenuesnaturalgassalesrelated100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

ogs:ReductioninincometaxexpensefortheamortizationoftheregulatoryliabilityassociatedwithexcessADITthatwasreturnedtocustomers

ogs:ReductioninincometaxexpensefortheamortizationoftheregulatoryliabilityassociatedwithexcessADITthatwasreturnedtocustomers


Reductioninincometaxexpensefortheamortizationoftheregulatoryliabilityassociatedwithexcess
Period End2021-06-302021-03-312020-06-302020-03-312019-06-302019-03-31
Value2.68.12.56.92.16.7
Percentage of ReductioninincometaxexpensefortheamortizationoftheregulatoryliabilityassociatedwithexcessADITthatwasreturnedtocustomers100.0100.0100.0100.0100.0100.0

us-gaap:AmortizationOfRateDeferral

us-gaap:AmortizationOfRateDeferral


Amortization
Period End2021-06-302021-03-312020-06-302020-03-31
Value1.02.90.61.5
Percentage of AmortizationOfRateDeferral100.0100.0100.0100.0

us-gaap:CapitalExpendituresIncurredButNotYetPaid

us-gaap:CapitalExpendituresIncurredButNotYetPaid


Capital
Period End2021-06-302021-03-312020-06-302020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-31
Value-4.1112.74.2-0.70.71.76.7-4.99.7
Percentage of CapitalExpendituresIncurredButNotYetPaid100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:CommonStockDividendsPerShareCashPaid

us-gaap:CommonStockDividendsPerShareCashPaid


Common
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-30
Value0.580.580.540.540.540.540.50.50.50.50.460.460.460.460.420.420.420.420.350.350.350.350.30.30.30.30.280.280.280000
Percentage of CommonStockDividendsPerShareCashPaid100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.00.00.00.0

us-gaap:CommonStockDividendsPerShareDeclared

us-gaap:CommonStockDividendsPerShareDeclared


Common
Period End2021-06-302021-03-312020-06-302020-03-31
Value0.580.580.540.54
Percentage of CommonStockDividendsPerShareDeclared100.0100.0100.0100.0

us-gaap:CommonStockDividendsPerShareDeclared us-gaap:SubsequentEventType

us-gaap:SubsequentEvent


Common
Period End2021-09-302021-06-302021-03-312020-12-31
Value0.580.580.580.54
Percentage of CommonStockDividendsPerShareDeclared0.0100.0100.00.0

us-gaap:DefinedBenefitPlanAmortizationOfGainsLosses

us-gaap:DefinedBenefitPlanAmortizationOfGainsLosses


Defined
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-31
Value1111-74.361101010-61.7468.8218.8218.821-76.651010-10.95-10.647-10.648-10.648-10.648-10.799-10.04-10.036-10.037-9.8-12.564-12.565-12.565-8.544-8.542-8.541-8.542
Percentage of DefinedBenefitPlanAmortizationOfGainsLosses100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DefinedBenefitPlanAmortizationOfGainsLosses us-gaap:RetirementPlanType

us-gaap:OtherPostretirementBenefitPlansDefinedBenefit


Defined
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-30
Value-0.093-0.093-0.044-0.043-0.043-0.043-0.561-0.561-0.561-0.561-0.971-0.972-0.972-0.972-1.621-1.621-1.621
Percentage of DefinedBenefitPlanAmortizationOfGainsLosses-0.8-0.80.1-0.4-0.4-0.40.9-6.4-6.4-6.41.3-8.9-8.98.915.215.215.2

us-gaap:PensionPlansDefinedBenefit


Defined
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-30
Value-11.381-11.381-10.579-10.58-10.58-10.58-8.259-8.26-8.26-8.26-9.979-9.978-9.978-9.978-9.026-9.027-9.027
Percentage of DefinedBenefitPlanAmortizationOfGainsLosses-99.2-99.214.2-99.6-99.6-99.613.4-93.6-93.6-93.613.0-91.1-91.191.184.884.884.8

us-gaap:DefinedBenefitPlanAmortizationOfPriorServiceCostCredit

us-gaap:DefinedBenefitPlanAmortizationOfPriorServiceCostCredit


Defined
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-31
Value70000.070000.0-204000.029000.029000.029000.0-1177000.0168000.0168000.0168000.0-7993000.01142000.01142000.0-1142000.0-1150000.0-1149000.0-1149000.0-1149000.0-591000.0-909000.0-908000.0-908000.0-842000.0-374000.0-373000.0-373000.0-302000.0-303000.0-303000.0-303000.0
Percentage of DefinedBenefitPlanAmortizationOfPriorServiceCostCredit100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DefinedBenefitPlanAmortizationOfPriorServiceCostCredit us-gaap:RetirementPlanType

us-gaap:OtherPostretirementBenefitPlansDefinedBenefit


Defined
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-30
Value-70000.0-70000.0-30000.0-29000.0-29000.0-29000.0-169000.0-168000.0-168000.0-168000.0-1141000.0-1142000.0-1142000.0-1142000.0-1150000.0-1149000.0-1149000.0
Percentage of DefinedBenefitPlanAmortizationOfPriorServiceCostCredit-100.0-100.014.7-100.0-100.0-100.014.4-100.0-100.0-100.014.3-100.0-100.0100.0100.0100.0100.0

us-gaap:DefinedBenefitPlanExpectedReturnOnPlanAssets us-gaap:RetirementPlanType

us-gaap:DefinedBenefitPlanExpectedReturnOnPlanAssets

us-gaap:OtherPostretirementBenefitPlansDefinedBenefit


Defined
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-30
Value4.2024.2023.8683.8673.8673.8673.1453.1473.1473.1473.5713.5713.5713.5713.1493.1473.147
Percentage of DefinedBenefitPlanExpectedReturnOnPlanAssets100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:PensionPlansDefinedBenefit


Defined
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-30
Value1515151515151515151515151515141414
Percentage of DefinedBenefitPlanExpectedReturnOnPlanAssets371.2371.2395.0395.1395.1395.1492.3492.1492.1492.1424.1424.1424.1424.1464.4464.7464.7

us-gaap:DefinedBenefitPlanInterestCost us-gaap:RetirementPlanType

us-gaap:DefinedBenefitPlanInterestCost

us-gaap:OtherPostretirementBenefitPlansDefinedBenefit


Defined
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-30
Value1.5631.5631.891.8891.8891.8892.3312.3292.3292.3292.282.2792.2792.2792.4742.4722.472
Percentage of DefinedBenefitPlanInterestCost100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:PensionPlansDefinedBenefit


Defined
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-30
Value7.3657.3658.5448.5458.5458.545101010109.2019.29.29.2101010
Percentage of DefinedBenefitPlanInterestCost471.2471.2452.1452.4452.4452.4436.1436.6436.6436.6403.6403.7403.7403.7408.8409.1409.1

us-gaap:DefinedBenefitPlanNetPeriodicBenefitCost us-gaap:RetirementPlanType

us-gaap:DefinedBenefitPlanNetPeriodicBenefitCost

us-gaap:OtherPostretirementBenefitPlansDefinedBenefit


Defined
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-30
Value-2.219-2.219-1.541-1.541-1.541-1.5410.010.0090.0090.009-0.874-0.873-0.873-0.8730.4240.4240.424
Percentage of DefinedBenefitPlanNetPeriodicBenefitCost100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:PensionPlansDefinedBenefit


Defined
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-30
Value6.6036.6037.0627.0627.0627.0625.9475.9515.9515.9517.2657.2637.2637.2637.567.567.56
Percentage of DefinedBenefitPlanNetPeriodicBenefitCost-297.6-297.6-458.3-458.3-458.3-458.359470.066122.266122.266122.2-831.2-832.0-832.0-832.01783.01783.01783.0

us-gaap:DefinedBenefitPlanServiceCost us-gaap:RetirementPlanType

us-gaap:DefinedBenefitPlanServiceCost

us-gaap:OtherPostretirementBenefitPlansDefinedBenefit


Defined
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-30
Value0.3970.3970.4230.4230.4230.4230.4320.4340.4340.4340.5870.5890.5890.5890.6280.6270.627
Percentage of DefinedBenefitPlanServiceCost100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:PensionPlansDefinedBenefit


Defined
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-30
Value3.4533.4533.2183.2173.2173.2173.0063.0083.0083.0083.2293.233.233.233.0443.0443.044
Percentage of DefinedBenefitPlanServiceCost869.8869.8760.8760.5760.5760.5695.8693.1693.1693.1550.1548.4548.4548.4484.7485.5485.5

us-gaap:DividendsCommonStock

us-gaap:DividendsCommonStock


Dividends
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-30
Value3030282828262626242424242121222218181818151515151414
Percentage of DividendsCommonStock100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DividendsCommonStock us-gaap:StatementEquityComponents

us-gaap:AdditionalPaidInCapital


Dividends
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-30
Value-0.26-0.26-0.228-0.227-0.232-0.225-0.226-0.227-0.22-0.221-0.227-0.224-0.228-0.228-0.24-0.23-0.228-0.227-0.227-0.229-0.254-1.3430.2820.263-0.6240.0
Percentage of DividendsCommonStock-0.8-0.8-0.8-0.8-0.8-0.9-0.9-0.9-0.9-0.9-0.9-0.9-1.0-1.0-1.1-1.0-1.2-1.2-1.2-1.2-1.6-8.61.81.7-4.30.0

us-gaap:RetainedEarnings


Dividends
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-30
Value3131282828262626242424242222222218181818151516161514
Percentage of DividendsCommonStock100.8100.8100.8100.8100.8100.9100.9100.9100.9100.9100.9100.9101.0101.0101.1101.0101.2101.2101.2101.2101.6101.6101.8101.7104.3100.0

us-gaap:EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate

us-gaap:EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate


Effective
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value20.7900.210000.210000.21
Percentage of EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate100.00.0100.00.00.00.0100.00.00.00.0100.0

us-gaap:ExcessTaxBenefitFromShareBasedCompensationFinancingActivities

us-gaap:ExcessTaxBenefitFromShareBasedCompensationFinancingActivities


Excess
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-31
Value-36000.0-4292000.0-89000.0-38000.0-152000.0-5988000.0-107000.0-73000.0-95000.0-7300000.0-4000.0-289000.0-42000.0-7817000.0-61000.0-169000.0-106000.0-9180000.0-17000.0-103000.0-53000.0-8849000.0
Percentage of ExcessTaxBenefitFromShareBasedCompensationFinancingActivities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:IncreaseDecreaseInCustomerDeposits

us-gaap:IncreaseDecreaseInCustomerDeposits


Increase
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-31
Value-0.476-10.78712-1.63-1.3230.2850.456-1.3-3.571.218-0.3860.32-0.6121.051.168-0.88-1.4220.7360.784-1.013-0.9852.0981.994-0.848-1.6770.8532.6860.251-1.7181.4241.503-0.255-2.2440.269
Percentage of IncreaseDecreaseInCustomerDeposits100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:IncreaseDecreaseInMaterialsAndSupplies

us-gaap:IncreaseDecreaseInMaterialsAndSupplies


Increase
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-30
Value0.928-1.619-2.7260.9061.196-2.342-1.0566.4443.4492.5623.974.2391.062-4.610.8831.9132.5880.2043.986-2.522.91-3.617-0.0751.7185.12-0.949-4.63-3.863
Percentage of IncreaseDecreaseInMaterialsAndSupplies100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:IncreaseDecreaseInOtherCurrentAssetsAndLiabilitiesNet

us-gaap:IncreaseDecreaseInOtherCurrentAssetsAndLiabilitiesNet


Increase
Period End2021-06-302021-03-312020-06-302020-03-31
Value16303000.0-20698000.0-3275000.0-4575000.0
Percentage of IncreaseDecreaseInOtherCurrentAssetsAndLiabilitiesNet100.0100.0100.0100.0

us-gaap:IncreaseDecreaseInOtherNoncurrentAssetsAndLiabilitiesNet

us-gaap:IncreaseDecreaseInOtherNoncurrentAssetsAndLiabilitiesNet


Increase
Period End2021-06-302021-03-312020-06-302020-03-31
Value-33.86114-11.5335.173
Percentage of IncreaseDecreaseInOtherNoncurrentAssetsAndLiabilitiesNet100.0100.0100.0100.0

us-gaap:IncreaseDecreaseInOtherRegulatoryAssets

us-gaap:IncreaseDecreaseInOtherRegulatoryAssets


Increase
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-31
Value119.8859.9519.189.888131311
Percentage of IncreaseDecreaseInOtherRegulatoryAssets100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:IncreaseDecreaseInPropertyAndOtherTaxesPayable

us-gaap:IncreaseDecreaseInPropertyAndOtherTaxesPayable


Increase
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-31
Value-9.7692.0596.06815-4.852-1.1820.7519.893-14.5914.263-1.1213-12.546.147-3.33411-3.869-5.142.6528.243-6.1080.535-3.186.23-13.663.1171.2564.845-17.9124-6.4528.968-0.9970.93
Percentage of IncreaseDecreaseInPropertyAndOtherTaxesPayable100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:IncreaseDecreaseInReceivables

us-gaap:IncreaseDecreaseInReceivables


Increase
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-31
Value-117.202-9.64202-30.835-90.956-22.608133-37.99-166.98744164-28.844-138.1777.447173-23.582-95.657-39.508187-9.441-78.52-19.801114-38.443-164.946-17.003193-55.046-203.88542233-46.245-145.11159
Percentage of IncreaseDecreaseInReceivables100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:IncreaseDecreaseInRegulatoryAssetsAndLiabilities

us-gaap:IncreaseDecreaseInRegulatoryAssetsAndLiabilities


Increase
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-31
Value208.714-4.932-8.0075.7523.142-29.09-9.1695.699-22.243-83.724-17.8028.334-1.141-18.64130152.3730.59313-5.3774.443-63.434-6.759-4.695-7.547-11.066-1.18119-21.522-26.35
Percentage of IncreaseDecreaseInRegulatoryAssetsAndLiabilities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentNetOfTax

us-gaap:OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentNetOfTax


Other
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-31
Value-299000.0-300000.01708000.0-223000.0-223000.0-224000.01915000.0-160000.0-160000.0-160000.0-1081000.0-203000.0-203000.080000.01164000.0-128000.0-129000.0-129000.0661000.0-116000.0-115000.0-116000.0-350000.0-141000.0-142000.0-140000.01625000.078000.0-3315000.03393000.00000
Percentage of OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentNetOfTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.00.00.00.0

us-gaap:OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansTax

us-gaap:OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansTax


Other
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-31
Value-91000.0-91000.0513000.0-75000.0-75000.0-74000.0638000.0-53000.053000.0-53000.0905000.0-68000.0-68000.0-351000.0728000.0-81000.0-81000.0-80000.0414000.0-72000.0-73000.0-72000.0-219000.0-88000.0-88000.0-88000.01146000.049000.0-2075000.02124000.00000
Percentage of OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.00.00.00.0

us-gaap:OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansBeforeTax

us-gaap:OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansBeforeTax


Other
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-31
Value390000.0391000.0-2086000.0298000.0298000.0298000.0-1491000.0213000.0213000.0213000.0-1895000.0271000.0271000.0-271000.0-209000.0-209000.0-210000.0-209000.0-187000.0-188000.0-188000.0-188000.0-230000.0-229000.0-230000.0-228000.0-767000.0127000.0-5390000.05517000.0
Percentage of OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansBeforeTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansNetOfTax

us-gaap:OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansNetOfTax


Other
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-31
Value299000.0300000.0-1564000.0223000.0223000.0224000.0-1119000.0160000.0160000.0160000.0-1137000.0203000.0203000.080000.0-129000.0-128000.0-129000.0-129000.0-115000.0-116000.0-115000.0-116000.0-141000.0-141000.0-142000.0-140000.0-471000.078000.0-3315000.03393000.0
Percentage of OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansNetOfTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansTax

us-gaap:OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansTax


Other
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-31
Value-91000.0-91000.0-74000.0-75000.0-75000.0-74000.0-54000.0-53000.0-53000.0-53000.0216000.0-68000.0-68000.0-351000.0-80000.0-81000.0-81000.0-80000.0-72000.0-72000.0-73000.0-72000.0-89000.0-88000.0-88000.0-88000.0-296000.049000.0-2075000.02124000.0
Percentage of OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:PaymentsForProceedsFromOtherInvestingActivities

us-gaap:PaymentsForProceedsFromOtherInvestingActivities


Payments
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-09-302016-06-302016-03-312015-09-302015-06-302015-03-31
Value470000.02351000.0564000.0501000.0314000.0-4056000.0473000.0543000.03040000.00000-1000.0-140000.0-416000.0-61000.00-100000.0-392000.0000
Percentage of PaymentsForProceedsFromOtherInvestingActivities100.0100.0100.0100.0100.0100.0100.0100.0100.00.00.00.00.0100.0100.0100.0100.00.0100.0100.00.00.00.0

us-gaap:PaymentsOfDebtIssuanceCosts

us-gaap:PaymentsOfDebtIssuanceCosts


Payments
Period End2021-06-302021-03-312020-09-30
Value0.0350.0
Percentage of PaymentsOfDebtIssuanceCosts0.0100.00.0

us-gaap:ProceedsFromIssuanceOfCommonStock

us-gaap:ProceedsFromIssuanceOfCommonStock


Proceeds
Period End2020-12-312020-09-302019-12-312019-09-302018-12-312018-09-302017-12-312017-09-302016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-31
Value3.058132.580.02.4130.02.2490.02.0340.01.9830.02.580.02.3152.1560.6710.6370.6760.0170.00.00.00.0
Percentage of ProceedsFromIssuanceOfCommonStock100.0100.0100.00.0100.00.0100.00.0100.00.0100.00.0100.00.0100.0100.0100.0100.0100.0100.00.00.00.00.0

us-gaap:ProceedsFromIssuanceOfSeniorLongTermDebt

us-gaap:ProceedsFromIssuanceOfSeniorLongTermDebt


Proceeds
Period End2021-06-302021-03-312020-09-30
Value0.024980.0
Percentage of ProceedsFromIssuanceOfSeniorLongTermDebt0.0100.00.0

us-gaap:ProceedsFromRepaymentsOfCommercialPaper

us-gaap:ProceedsFromRepaymentsOfCommercialPaper


Proceeds
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-31
Value-447.02811077-244.195-41.805121102-2.5-4.02391-97.607-74.60818395-6.4-59.6104410.0-12.5120.00.0-42.0420.00.00.0
Percentage of ProceedsFromRepaymentsOfCommercialPaper100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0100.0100.00.00.0100.0100.00.00.00.0

us-gaap:ProceedsFromSaleOfOtherAssetsInvestingActivities

us-gaap:ProceedsFromSaleOfOtherAssetsInvestingActivities


Proceeds
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-30
Value475000.0241000.01295000.01742000.090000.0650000.0363000.0438000.0287000.0311000.000
Percentage of ProceedsFromSaleOfOtherAssetsInvestingActivities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.00.0

us-gaap:ProvisionForDoubtfulAccounts

us-gaap:ProvisionForDoubtfulAccounts


Provision
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-31
Value1.7423.7546.6141.2734.4863.0774.3941.0431.2942.2631.7482.6871.3492.7222.8151.0071.222.2811.9060.7641.3731.3841.5690.8521.2030.8962.1761.3082.820.8911.3311.4632.0480.618
Percentage of ProvisionForDoubtfulAccounts100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:RegulatedOperatingRevenueGas

us-gaap:RegulatedOperatingRevenueGas


Regulated
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-31
Value311623479240270518452244287661464235291635462247279550440232245508389225256676514241296766522219311635
Percentage of RegulatedOperatingRevenueGas100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:RegulatedOperatingRevenueGas ogs:REVENUE

ogs:Miscellaneousrevenues


Regulated
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-09-302017-06-302017-03-31
Value4.0733.6554.1153.83.124.475.0464.6775.4285.4284.294.8935.7596.7684.765.1965.785
Percentage of RegulatedOperatingRevenueGas1.30.60.91.61.20.91.11.91.90.80.92.12.01.11.91.91.1

ogs:Naturalgassalestocustomers


Regulated
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-09-302017-06-302017-03-31
Value281583444212243480416215258621430208261594218247500
Percentage of RegulatedOperatingRevenueGas90.393.692.688.389.892.692.188.489.893.992.688.689.893.788.288.590.9

ogs:Transportationrevenues


Regulated
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-09-302017-06-302017-03-31
Value2636312424333123233530212433212130
Percentage of RegulatedOperatingRevenueGas8.45.86.510.19.06.56.99.78.35.36.59.38.35.38.77.65.5

us-gaap:RegulatedOperatingRevenueOther

us-gaap:RegulatedOperatingRevenueOther


Regulated
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302018-12-312018-09-302018-06-302018-03-312017-09-302017-06-302017-03-31
Value3.9071.642-3.9453.8122.3789.2234.1344.1832.5812.8162.5231.3533.2272.745.65614
Percentage of RegulatedOperatingRevenueOther100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:RegulatedOperatingRevenueOther ogs:REVENUE

ogs:Otherrevenues


Regulated
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-09-302017-06-302017-03-31
Value2.5822.663103.8782.3812.676-2.5673.4482.3741.9960.3072.1482.4612.1972.172.2792.085
Percentage of RegulatedOperatingRevenueOther66.1162.2-274.6101.7100.129.0-62.182.492.00.010.985.1181.968.179.240.314.6

us-gaap:StockIssuedDuringPeriodSharesNewIssues us-gaap:StatementEquityComponents

us-gaap:StockIssuedDuringPeriodSharesNewIssues

us-gaap:CommonStock


Stock
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-31
Value254230.078278.0176360.059722.089059.02401.047588.088629.0000
Percentage of StockIssuedDuringPeriodSharesNewIssues100.0100.0100.0100.0100.0100.0100.0100.00.00.00.0

us-gaap:UtilitiesOperatingExpense

us-gaap:UtilitiesOperatingExpense


Utilities
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-31
Value170180190163166168179160161168164150157157162147153162164149145156157145145153154147149150158145139149
Percentage of UtilitiesOperatingExpense100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:UtilitiesOperatingExpenseDepreciationAndAmortization

us-gaap:UtilitiesOperatingExpenseDepreciationAndAmortization


Utilities
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-31
Value50525147474746454443414039383838373737363534343333313131313144323234
Percentage of UtilitiesOperatingExpenseDepreciationAndAmortization100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:UtilitiesOperatingExpenseMaintenanceAndOperations

us-gaap:UtilitiesOperatingExpenseMaintenanceAndOperations


Utilities
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-31
Value103110122100103104118100101108109961021021109510110911499971061099899106111101103103100999399
Percentage of UtilitiesOperatingExpenseMaintenanceAndOperations100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:UtilitiesOperatingExpenseTaxes

us-gaap:UtilitiesOperatingExpenseTaxes


Utilities
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-31
Value16171615151614141416141314161313131513131315131213151014141513131215
Percentage of UtilitiesOperatingExpenseTaxes100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:WeightedAverageNumberDilutedSharesOutstandingAdjustment

us-gaap:WeightedAverageNumberDilutedSharesOutstandingAdjustment


Weighted
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-312017-09-302017-06-302017-03-312016-09-302016-06-302016-03-312015-09-302015-06-302015-03-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-31
Value82000.0143000.0218000.0211000.0261000.0334000.0325000.0381000.0376000.0207000.0293000.0438000.0416000.0480000.0489000.0450000.0588000.0664000.0671000.0739000.0653000.0649000.0178000.0000
Percentage of WeightedAverageNumberDilutedSharesOutstandingAdjustment100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.00.00.0

dei:EntityCommonStockSharesOutstanding

dei:EntityCommonStockSharesOutstanding


Entity
Period End2021-02-22
Value53
Percentage of EntityCommonStockSharesOutstanding100.0

ogs:AtTheMarketEquityProgramIssuanceCosts

ogs:AtTheMarketEquityProgramIssuanceCosts


At
Period End2021-06-302020-06-30
Value150.4
Percentage of AtTheMarketEquityProgramIssuanceCosts100.0100.0

ogs:AttheMarketEquityProgramEquityAvailableforIssuance

ogs:AttheMarketEquityProgramEquityAvailableforIssuance


Atthe
Period End2021-06-302021-03-312020-06-30
Value221236249
Percentage of AttheMarketEquityProgramEquityAvailableforIssuance100.0100.0100.0

ogs:Capitalizednonservicecostcomponentsasaregulatoryasset

ogs:Capitalizednonservicecostcomponentsasaregulatoryasset


Capitalizednonservicecostcomponentsasaregulatoryasset
Period End2021-06-302021-03-312020-12-312020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-31
Value6100000.06200000.06000000.05900000.05400000.04700000.03800000.02900000.02200000.01500000.0
Percentage of Capitalizednonservicecostcomponentsasaregulatoryasset100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

ogs:Commercialpapermaximumborrowingcapacity

ogs:Commercialpapermaximumborrowingcapacity


Commercialpapermaximumborrowingcapacity
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-312017-09-30
Value1000700700700700700700700700700700700700700
Percentage of Commercialpapermaximumborrowingcapacity100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

ogs:Corporatebondsinotherassets

ogs:Corporatebondsinotherassets


Corporatebondsinotherassets
Period End2021-06-302021-03-312020-12-312020-06-302020-03-312019-12-31
Value3800000.03600000.01600000.02900000.02300000.02600000.0
Percentage of Corporatebondsinotherassets100.0100.0100.0100.0100.0100.0

ogs:DebtInstrumentCovenantComplianceDefaultProvisionIndebtnednessThreshold

ogs:DebtInstrumentCovenantComplianceDefaultProvisionIndebtnednessThreshold


Debt
Period End2020-12-31
Value100
Percentage of DebtInstrumentCovenantComplianceDefaultProvisionIndebtnednessThreshold100.0

ogs:DeferredTaxAssetsLeasingArrangements

ogs:DeferredTaxAssetsLeasingArrangements


Deferred
Period End2020-12-312019-12-312018-12-31
Value9319000.08599000.00
Percentage of DeferredTaxAssetsLeasingArrangements100.0100.00.0

ogs:Deferredtaxassetemployeebenefitsandotheraccruedliabilities

ogs:Deferredtaxassetemployeebenefitsandotheraccruedliabilities


Deferredtaxassetemployeebenefitsandotheraccruedliabilities
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-31
Value283248401231101280.0
Percentage of Deferredtaxassetemployeebenefitsandotheraccruedliabilities100.0100.0100.0100.0100.0100.0100.00.0

ogs:Deferredtaxassetregulatoryadjustments

ogs:Deferredtaxassetregulatoryadjustments


Deferredtaxassetregulatoryadjustments
Period End2020-12-312019-12-312018-12-312017-12-312016-12-31
Value1211241291290.0
Percentage of Deferredtaxassetregulatoryadjustments100.0100.0100.0100.00.0

ogs:DefinedBenefitPlanAccumulatedOtherComprehensiveIncomeLossBeforeRegulatoryAssetsAndTaxes us-gaap:RetirementPlanType

ogs:DefinedBenefitPlanAccumulatedOtherComprehensiveIncomeLossBeforeRegulatoryAssetsAndTaxes

us-gaap:OtherPostretirementBenefitPlansDefinedBenefit


Defined
Period End2020-12-312019-12-312018-12-312017-12-31
Value-13049000.0-19458000.0-33269000.0-43588000.0
Percentage of DefinedBenefitPlanAccumulatedOtherComprehensiveIncomeLossBeforeRegulatoryAssetsAndTaxes100.0100.0100.0100.0

us-gaap:PensionPlansDefinedBenefit


Defined
Period End2020-12-312019-12-312018-12-312017-12-31
Value-351060000.0-381630000.0-419240000.0-378600000.0
Percentage of DefinedBenefitPlanAccumulatedOtherComprehensiveIncomeLossBeforeRegulatoryAssetsAndTaxes2690.31961.31260.1868.6

ogs:Fairvaluenaturalgascalloptions us-gaap:FairValueByFairValueHierarchyLevel

ogs:Fairvaluenaturalgascalloptions

us-gaap:FairValueInputsLevel1


Fairvaluenaturalgascalloptionsus-gaap:
Period End2021-06-302020-12-312020-09-302020-06-302019-12-312019-09-302019-06-302018-12-312018-09-302018-06-302017-12-312017-09-302017-06-302016-12-312016-09-302016-06-302015-12-312015-09-302015-06-302014-12-312014-09-302014-06-302013-12-31
Value110.8154.90.36.03.02.18.63.81.16.94.06.58.16.40.44.45.50.19.54.88.7
Percentage of Fairvaluenaturalgascalloptions100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

ogs:Fairvalueofnaturalgascalloptionsheld us-gaap:FairValueByFairValueHierarchyLevel

ogs:Fairvalueofnaturalgascalloptionsheld

us-gaap:FairValueInputsLevel1


Fairvalueofnaturalgascalloptionsheldus-gaap:
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312014-03-312013-12-31
Value800000.0300000.02100000.01100000.06500000.0400000.0100000.008700000.0
Percentage of Fairvalueofnaturalgascalloptionsheld100.0100.0100.0100.0100.0100.0100.00.0100.0

ogs:February2021NaturalGasPurchases

ogs:February2021NaturalGasPurchases


February2021
Period End2021-02-28
Value2100
Percentage of February2021NaturalGasPurchases100.0

ogs:KGSDeferredExtraordinaryCostsFrom2021WinterStormUri

ogs:KGSDeferredExtraordinaryCostsFrom2021WinterStormUri


K
Period End2021-06-302021-03-31
Value383381
Percentage of KGSDeferredExtraordinaryCostsFrom2021WinterStormUri100.0100.0

ogs:LineofCreditFacilityOptiontoIncreaseBorrowingCapacity us-gaap:LongtermDebtType

ogs:LineofCreditFacilityOptiontoIncreaseBorrowingCapacity

us-gaap:LineOfCredit


Lineof
Period End2020-12-31
Value500
Percentage of LineofCreditFacilityOptiontoIncreaseBorrowingCapacity100.0

ogs:LineofCreditFacilitySublimit us-gaap:LongtermDebtType

ogs:LineofCreditFacilitySublimit

us-gaap:LineOfCredit


Lineof
Period End2020-12-31
Value20
Percentage of LineofCreditFacilitySublimit100.0

ogs:Netregulatoryassetsandliabilitiescurrent

ogs:Netregulatoryassetsandliabilitiescurrent


Netregulatoryassetsandliabilitiescurrent
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-31
Value27204151216.1592.2395.339-8.162-16.0316.0267.374-8.4654.99978886760716034228.31-9.634-15.994-31.93171813143.861
Percentage of Netregulatoryassetsandliabilitiescurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

ogs:Netregulatoryassetsandliabilitiesnoncurrent

ogs:Netregulatoryassetsandliabilitiesnoncurrent


Netregulatoryassetsandliabilitiesnoncurrent
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-31
Value17711809-180.607-191.141-184.874-113.524-112.482-90.821-84.573-82.225-83.387-146.658-136.153-123.381-114.2324114214304404244044144264284384504632943043112.447
Percentage of Netregulatoryassetsandliabilitiesnoncurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

ogs:ONEGas2021TermLoanFacilityMaximumBorrowingCapacity us-gaap:LongtermDebtType

ogs:ONEGas2021TermLoanFacilityMaximumBorrowingCapacity

ogs:ONEGas2021TermLoanFacility


O
Period End2021-02-22
Value2500
Percentage of ONEGas2021TermLoanFacilityMaximumBorrowingCapacity100.0

ogs:Premiumsrecordedinothercurrentassetsonnaturalgascontractsheld

ogs:Premiumsrecordedinothercurrentassetsonnaturalgascontractsheld


Premiumsrecordedinothercurrentassetsonnaturalgascontractsheld
Period End2021-06-302020-12-312020-09-302020-06-302019-12-312019-09-302019-06-302018-12-312018-09-302018-06-302017-12-312017-09-302017-06-302016-12-312016-09-302016-06-302015-12-312015-09-302015-06-302014-12-312014-09-302014-06-302013-12-31
Value6.16.7135.84.49.03.94.17.63.65.5105.65.49.44.15.8115.96.4136.98.6
Percentage of Premiumsrecordedinothercurrentassetsonnaturalgascontractsheld100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

ogs:ReclassificationOther

ogs:ReclassificationOther


Reclassification
Period End2020-12-31
Value10000000.0
Percentage of ReclassificationOther100.0

ogs:ReductionInADITRecordedAsAnEDITRegulatoryLiabilityAssociatedWithReductionOfOklahomaStateIncomeTax

ogs:ReductionInADITRecordedAsAnEDITRegulatoryLiabilityAssociatedWithReductionOfOklahomaStateIncomeTax


Reduction
Period End2021-06-30
Value29
Percentage of ReductionInADITRecordedAsAnEDITRegulatoryLiabilityAssociatedWithReductionOfOklahomaStateIncomeTax100.0

ogs:ReductionToBaseRatesDueToKansasGasServiceTaxReformRegulatoryLiability

ogs:ReductionToBaseRatesDueToKansasGasServiceTaxReformRegulatoryLiability


Reduction
Period End2020-12-31
Value4900000.0
Percentage of ReductionToBaseRatesDueToKansasGasServiceTaxReformRegulatoryLiability100.0

ogs:RegulatoryAssetForCostsAssociatedWithManufacturedGasSites

ogs:RegulatoryAssetForCostsAssociatedWithManufacturedGasSites


Regulatory
Period End2021-06-302021-03-312020-12-312019-12-31
Value1818189.8
Percentage of RegulatoryAssetForCostsAssociatedWithManufacturedGasSites100.0100.0100.0100.0

ogs:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsFairValueOfSharesGranted us-gaap:AwardType

ogs:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsFairValueOfSharesGranted

us-gaap:PerformanceShares


Share
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-31
Value6502000.06401000.05882000.05110000.04766000.04486000.04462000.02926000.0
Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsFairValueOfSharesGranted100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:RestrictedStockUnitsRSU


Share
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-31
Value3005000.03001000.02583000.02420000.02503000.03141000.03149000.01323000.0
Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsFairValueOfSharesGranted46.246.943.947.452.570.070.645.2

ogs:TGSDeferredExtraordinaryCostsFrom2021WinterStormUri

ogs:TGSDeferredExtraordinaryCostsFrom2021WinterStormUri


T
Period End2021-06-302021-03-31
Value286295
Percentage of TGSDeferredExtraordinaryCostsFrom2021WinterStormUri100.0100.0

ogs:TotalDeferredCreditsAndOtherLiabilities

ogs:TotalDeferredCreditsAndOtherLiabilities


Total
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-31
Value141414211415140514161423142014671473147514411406140213991380145314541444141813801325131012971260125812641261101810341033809
Percentage of TotalDeferredCreditsAndOtherLiabilities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

ogs:Totalgoodwillandotherassets

ogs:Totalgoodwillandotherassets


Totalgoodwillandotherassets
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-31
Value25902610621614626632636655669676641582591601610613626634642636617622649653668675687522538545199
Percentage of Totalgoodwillandotherassets100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

ogs:Treasurynotesinotherassets

ogs:Treasurynotesinotherassets


Treasurynotesinotherassets
Period End2021-06-302021-03-312020-12-312020-06-302020-03-312019-12-31
Value3000000.03200000.03200000.02900000.03000000.03000000.0
Percentage of Treasurynotesinotherassets100.0100.0100.0100.0100.0100.0

us-gaap:AccrualForEnvironmentalLossContingencies

us-gaap:AccrualForEnvironmentalLossContingencies


Accrual
Period End2021-06-302021-03-312020-12-312019-12-31
Value1313145.8
Percentage of AccrualForEnvironmentalLossContingencies100.0100.0100.0100.0

us-gaap:AccrualForTaxesOtherThanIncomeTaxesCurrent

us-gaap:AccrualForTaxesOtherThanIncomeTaxesCurrent


Accrual
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-31
Value56656357414647473751474834474144333742393137374034474443385632
Percentage of AccrualForTaxesOtherThanIncomeTaxesCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:AccumulatedOtherComprehensiveIncomeLossDefinedBenefitPensionAndOtherPostretirementPlansNetOfTax us-gaap:RetirementPlanType

us-gaap:AccumulatedOtherComprehensiveIncomeLossDefinedBenefitPensionAndOtherPostretirementPlansNetOfTax

us-gaap:PensionPlansDefinedBenefit


Accumulated
Period End2020-12-312019-12-312018-12-312017-12-31
Value-7777000.0-6739000.0-4086000.0-5493000.0
Percentage of AccumulatedOtherComprehensiveIncomeLossDefinedBenefitPensionAndOtherPostretirementPlansNetOfTax100.0100.0100.0100.0

us-gaap:AllowanceForDoubtfulAccountsPremiumsAndOtherReceivables

us-gaap:AllowanceForDoubtfulAccountsPremiumsAndOtherReceivables


Allowance
Period End2021-06-302021-03-312020-12-312020-06-302019-12-31
Value201916126.6
Percentage of AllowanceForDoubtfulAccountsPremiumsAndOtherReceivables100.0100.0100.0100.0100.0

us-gaap:AllowanceForDoubtfulAccountsReceivableCurrent

us-gaap:AllowanceForDoubtfulAccountsReceivableCurrent


Allowance
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-31
Value166.64.74.84.23.54.03.3
Percentage of AllowanceForDoubtfulAccountsReceivableCurrent100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:BridgeLoan us-gaap:LongtermDebtType

us-gaap:BridgeLoan

us-gaap:LineOfCredit


Bridge
Period End2020-12-31
Value60
Percentage of BridgeLoan100.0

us-gaap:CapitalizationLongtermDebtAndEquity

us-gaap:CapitalizationLongtermDebtAndEquity


Capitalization
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-31
Value6400637938153782377334753415338733943390332829102916291431533125312631373080305430673059304230123020304029952972298129842267
Percentage of CapitalizationLongtermDebtAndEquity100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:CommercialPaper

us-gaap:CommercialPaper


Commercial
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
Value4474183082304745163952932952992761852823571747985145410.00.0120.00.00.0420.0
Percentage of CommercialPaper100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.00.0100.00.00.00.0100.00.0

us-gaap:CustomerDepositsCurrent

us-gaap:CustomerDepositsCurrent


Customer
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-31
Value56576855565857575862616161616059606161606162605859606057575857
Percentage of CustomerDepositsCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DebtInstrumentUnamortizedDiscountPremiumAndDebtIssuanceCostsNet

us-gaap:DebtInstrumentUnamortizedDiscountPremiumAndDebtIssuanceCostsNet


Debt
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302016-12-31
Value12121313131010111111117.6147.6147.8248.0338.2398.4458.851
Percentage of DebtInstrumentUnamortizedDiscountPremiumAndDebtIssuanceCostsNet100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DeferredIncomeTaxLiabilities

us-gaap:DeferredIncomeTaxLiabilities


Deferred
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-31
Value820851832797119010691030757
Percentage of DeferredIncomeTaxLiabilities100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DeferredTaxAssetsGross

us-gaap:DeferredTaxAssetsGross


Deferred
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-31
Value16316818019715211714248
Percentage of DeferredTaxAssetsGross100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DeferredTaxAssetsOther

us-gaap:DeferredTaxAssetsOther


Deferred
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-31
Value4790000.02772000.034000.02984000.05716000.07848000.05655000.08249000.0
Percentage of DeferredTaxAssetsOther100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DeferredTaxLiabilitiesLeasingArrangements

us-gaap:DeferredTaxLiabilitiesLeasingArrangements


Deferred
Period End2020-12-312019-12-312018-12-31
Value9788000.08599000.00
Percentage of DeferredTaxLiabilitiesLeasingArrangements100.0100.00.0

us-gaap:DeferredTaxLiabilitiesOther

us-gaap:DeferredTaxLiabilitiesOther


Deferred
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-31
Value88961051061861681932.563
Percentage of DeferredTaxLiabilitiesOther100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DeferredTaxLiabilitiesPropertyPlantAndEquipment

us-gaap:DeferredTaxLiabilitiesPropertyPlantAndEquipment


Deferred
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-31
Value717742717677990897820750
Percentage of DeferredTaxLiabilitiesPropertyPlantAndEquipment100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DeferredTaxLiabilitiesRegulatoryAssets us-gaap:RetirementPlanType

us-gaap:DeferredTaxLiabilitiesRegulatoryAssets

us-gaap:PensionPlansDefinedBenefit


Deferred
Period End2020-12-312019-12-312018-12-312017-12-31
Value2157000.01869000.02607000.03455000.0
Percentage of DeferredTaxLiabilitiesRegulatoryAssets100.0100.0100.0100.0

us-gaap:DeferredTaxLiabilitiesRegulatoryAssetsAndLiabilities

us-gaap:DeferredTaxLiabilitiesRegulatoryAssetsAndLiabilities


Deferred
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-31
Value5.243.5568.98113133.999164.695
Percentage of DeferredTaxLiabilitiesRegulatoryAssetsAndLiabilities100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DefinedBenefitPlanAccumulatedBenefitObligation us-gaap:RetirementPlanType

us-gaap:DefinedBenefitPlanAccumulatedBenefitObligation

us-gaap:PensionPlansDefinedBenefit


Defined
Period End2020-12-312019-12-312018-12-312017-12-31
Value1000937890936
Percentage of DefinedBenefitPlanAccumulatedBenefitObligation100.0100.0100.0100.0

us-gaap:DefinedBenefitPlanAccumulatedOtherComprehensiveIncomeBeforeTax us-gaap:RetirementPlanType

us-gaap:DefinedBenefitPlanAccumulatedOtherComprehensiveIncomeBeforeTax

us-gaap:PensionPlansDefinedBenefit


Defined
Period End2020-12-312019-12-312018-12-312017-12-31
Value-9934000.0-8608000.0-6693000.0-8948000.0
Percentage of DefinedBenefitPlanAccumulatedOtherComprehensiveIncomeBeforeTax100.0100.0100.0100.0

us-gaap:DefinedBenefitPlanAccumulatedOtherComprehensiveIncomeNetGainsLossesBeforeTax us-gaap:RetirementPlanType

us-gaap:DefinedBenefitPlanAccumulatedOtherComprehensiveIncomeNetGainsLossesBeforeTax

us-gaap:OtherPostretirementBenefitPlansDefinedBenefit


Defined
Period End2020-12-312019-12-312018-12-312017-12-31
Value-13134000.0-19660000.0-34144000.0-49030000.0
Percentage of DefinedBenefitPlanAccumulatedOtherComprehensiveIncomeNetGainsLossesBeforeTax100.0100.0100.0100.0

us-gaap:PensionPlansDefinedBenefit


Defined
Period End2020-12-312019-12-312018-12-312017-12-31
Value-351060000.0-381630000.0-419240000.0-378600000.0
Percentage of DefinedBenefitPlanAccumulatedOtherComprehensiveIncomeNetGainsLossesBeforeTax2672.91941.21227.9772.2

us-gaap:DefinedBenefitPlanAccumulatedOtherComprehensiveIncomeNetPriorServiceCostCreditBeforeTax us-gaap:RetirementPlanType

us-gaap:DefinedBenefitPlanAccumulatedOtherComprehensiveIncomeNetPriorServiceCostCreditBeforeTax

us-gaap:OtherPostretirementBenefitPlansDefinedBenefit


Defined
Period End2020-12-312019-12-312018-12-312017-12-31
Value0.0850.2020.8755.442
Percentage of DefinedBenefitPlanAccumulatedOtherComprehensiveIncomeNetPriorServiceCostCreditBeforeTax100.0100.0100.0100.0

us-gaap:DefinedBenefitPlanAmountsRecognizedInBalanceSheet us-gaap:RetirementPlanType

us-gaap:DefinedBenefitPlanAmountsRecognizedInBalanceSheet

us-gaap:OtherPostretirementBenefitPlansDefinedBenefit


Defined
Period End2020-12-312019-12-312018-12-312017-12-31
Value-8635000.0-23308000.0-43285000.0-64814000.0
Percentage of DefinedBenefitPlanAmountsRecognizedInBalanceSheet100.0100.0100.0100.0

us-gaap:PensionPlansDefinedBenefit


Defined
Period End2020-12-312019-12-312018-12-312017-12-31
Value-90058000.0-93394000.0-136400000.0-109090000.0
Percentage of DefinedBenefitPlanAmountsRecognizedInBalanceSheet1042.9400.7315.1168.3

us-gaap:DefinedBenefitPlanBenefitObligation us-gaap:RetirementPlanType

us-gaap:DefinedBenefitPlanBenefitObligation

us-gaap:OtherPostretirementBenefitPlansDefinedBenefit


Defined
Period End2020-12-312019-12-312018-12-312017-12-312016-12-31
Value239230220255243
Percentage of DefinedBenefitPlanBenefitObligation100.0100.0100.0100.0100.0

us-gaap:PensionPlansDefinedBenefit


Defined
Period End2020-12-312019-12-312018-12-312017-12-312016-12-31
Value10771001950993966
Percentage of DefinedBenefitPlanBenefitObligation449.9434.5431.8389.7396.9

us-gaap:DefinedBenefitPlanExpectedFutureBenefitPaymentsFiveFiscalYearsThereafter us-gaap:RetirementPlanType

us-gaap:DefinedBenefitPlanExpectedFutureBenefitPaymentsFiveFiscalYearsThereafter

us-gaap:OtherPostretirementBenefitPlansDefinedBenefit


Defined
Period End2020-12-312019-12-312018-12-31
Value707377
Percentage of DefinedBenefitPlanExpectedFutureBenefitPaymentsFiveFiscalYearsThereafter100.0100.0100.0

us-gaap:PensionPlansDefinedBenefit


Defined
Period End2020-12-312019-12-312018-12-31
Value279280295
Percentage of DefinedBenefitPlanExpectedFutureBenefitPaymentsFiveFiscalYearsThereafter397.4380.2380.1

us-gaap:DefinedBenefitPlanExpectedFutureBenefitPaymentsNextTwelveMonths us-gaap:RetirementPlanType

us-gaap:DefinedBenefitPlanExpectedFutureBenefitPaymentsNextTwelveMonths

us-gaap:OtherPostretirementBenefitPlansDefinedBenefit


Defined
Period End2020-12-312019-12-312018-12-31
Value161616
Percentage of DefinedBenefitPlanExpectedFutureBenefitPaymentsNextTwelveMonths100.0100.0100.0

us-gaap:PensionPlansDefinedBenefit


Defined
Period End2020-12-312019-12-312018-12-31
Value514952
Percentage of DefinedBenefitPlanExpectedFutureBenefitPaymentsNextTwelveMonths318.9301.5312.7

us-gaap:DefinedBenefitPlanExpectedFutureBenefitPaymentsYearFive us-gaap:RetirementPlanType

us-gaap:DefinedBenefitPlanExpectedFutureBenefitPaymentsYearFive

us-gaap:OtherPostretirementBenefitPlansDefinedBenefit


Defined
Period End2020-12-312019-12-312018-12-31
Value151516
Percentage of DefinedBenefitPlanExpectedFutureBenefitPaymentsYearFive100.0100.0100.0

us-gaap:PensionPlansDefinedBenefit


Defined
Period End2020-12-312019-12-312018-12-31
Value545356
Percentage of DefinedBenefitPlanExpectedFutureBenefitPaymentsYearFive357.1339.9343.9

us-gaap:DefinedBenefitPlanExpectedFutureBenefitPaymentsYearFour us-gaap:RetirementPlanType

us-gaap:DefinedBenefitPlanExpectedFutureBenefitPaymentsYearFour

us-gaap:OtherPostretirementBenefitPlansDefinedBenefit


Defined
Period End2020-12-312019-12-312018-12-31
Value151616
Percentage of DefinedBenefitPlanExpectedFutureBenefitPaymentsYearFour100.0100.0100.0

us-gaap:PensionPlansDefinedBenefit


Defined
Period End2020-12-312019-12-312018-12-31
Value535255
Percentage of DefinedBenefitPlanExpectedFutureBenefitPaymentsYearFour346.3327.1334.1

us-gaap:DefinedBenefitPlanExpectedFutureBenefitPaymentsYearThree us-gaap:RetirementPlanType

us-gaap:DefinedBenefitPlanExpectedFutureBenefitPaymentsYearThree

us-gaap:OtherPostretirementBenefitPlansDefinedBenefit


Defined
Period End2020-12-312019-12-312018-12-31
Value151616
Percentage of DefinedBenefitPlanExpectedFutureBenefitPaymentsYearThree100.0100.0100.0

us-gaap:PensionPlansDefinedBenefit


Defined
Period End2020-12-312019-12-312018-12-31
Value525154
Percentage of DefinedBenefitPlanExpectedFutureBenefitPaymentsYearThree333.1316.8326.1

us-gaap:DefinedBenefitPlanExpectedFutureBenefitPaymentsYearTwo us-gaap:RetirementPlanType

us-gaap:DefinedBenefitPlanExpectedFutureBenefitPaymentsYearTwo

us-gaap:OtherPostretirementBenefitPlansDefinedBenefit


Defined
Period End2020-12-312019-12-312018-12-31
Value151616
Percentage of DefinedBenefitPlanExpectedFutureBenefitPaymentsYearTwo100.0100.0100.0

us-gaap:PensionPlansDefinedBenefit


Defined
Period End2020-12-312019-12-312018-12-31
Value515053
Percentage of DefinedBenefitPlanExpectedFutureBenefitPaymentsYearTwo324.9308.9318.6

us-gaap:DefinedBenefitPlanExpectedFutureEmployerContributionsNextFiscalYear us-gaap:RetirementPlanType

us-gaap:DefinedBenefitPlanExpectedFutureEmployerContributionsNextFiscalYear

us-gaap:PensionPlansDefinedBenefit


Defined
Period End2020-12-312019-12-312018-12-31
Value1100000.01100000.01000000.0
Percentage of DefinedBenefitPlanExpectedFutureEmployerContributionsNextFiscalYear100.0100.0100.0

us-gaap:DefinedBenefitPlanFundedStatusOfPlan us-gaap:RetirementPlanType

us-gaap:DefinedBenefitPlanFundedStatusOfPlan

us-gaap:OtherPostretirementBenefitPlansDefinedBenefit


Defined
Period End2020-12-312019-12-312018-12-312017-12-31
Value-8635000.0-23308000.0-43285000.0-64814000.0
Percentage of DefinedBenefitPlanFundedStatusOfPlan100.0100.0100.0100.0

us-gaap:PensionPlansDefinedBenefit


Defined
Period End2020-12-312019-12-312018-12-312017-12-31
Value-90058000.0-93394000.0-136400000.0-109090000.0
Percentage of DefinedBenefitPlanFundedStatusOfPlan1042.9400.7315.1168.3

us-gaap:DerivativeNonmonetaryNotionalAmount

us-gaap:DerivativeNonmonetaryNotionalAmount


Derivative
Period End2021-06-302020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302018-12-31
Value16.114.735400.014700.0014300.035500.014300.0
Percentage of DerivativeNonmonetaryNotionalAmount100.0100.0100.0100.00.0100.0100.0100.0

us-gaap:EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized us-gaap:AwardType

us-gaap:EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized

us-gaap:PerformanceShares


Employee
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-31
Value6700000.06400000.05800000.05100000.04800000.04700000.04900000.0
Percentage of EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized100.0100.0100.0100.0100.0100.0100.0

us-gaap:RestrictedStockUnitsRSU


Employee
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-31
Value3100000.03000000.02600000.02600000.02800000.03200000.02800000.0
Percentage of EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized46.346.944.851.058.368.157.1

us-gaap:FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetValue us-gaap:DefinedBenefitPlanByPlanAssetCategories, us-gaap:RetirementPlanType

us-gaap:FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetValue

ogs:Insurancecontractsandgroupannuitycontracts, us-gaap:PensionPlansDefinedBenefit


Fair
Period End2020-12-312019-12-312018-12-312017-12-312016-12-31
Value2425303545
Percentage of FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetValue100.0100.0100.0100.0100.0

us-gaap:OtherInvestments, us-gaap:PensionPlansDefinedBenefit


Fair
Period End2020-12-312019-12-312018-12-312017-12-312016-12-31
Value8781797857
Percentage of FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetValue356.2314.7260.2223.9127.1

us-gaap:FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetValue us-gaap:RetirementPlanType

us-gaap:PensionPlansDefinedBenefit


Fair
Period End2020-12-312019-12-312018-12-312017-12-312016-12-31
Value112107109113102
Percentage of FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetValue456.2414.7360.2323.9227.1

us-gaap:InterestPayableCurrent

us-gaap:InterestPayableCurrent


Interest
Period End2021-06-302020-12-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302014-12-312014-06-302013-12-31
Value2520187.867197.667187.742187.667187.691187.654187.6471818190.129
Percentage of InterestPayableCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueNextTwelveMonths

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueNextTwelveMonths


Lessee
Period End2020-12-31
Value7900000.0
Percentage of LesseeOperatingLeaseLiabilityPaymentsDueNextTwelveMonths100.0

us-gaap:LineOfCreditFacilityRemainingBorrowingCapacity

us-gaap:LineOfCreditFacilityRemainingBorrowingCapacity


Line
Period End2021-06-302021-03-312020-12-312020-09-30
Value998998948698
Percentage of LineOfCreditFacilityRemainingBorrowingCapacity100.0100.0100.0100.0

us-gaap:LongTermDebtFairValue us-gaap:FairValueByFairValueHierarchyLevel

us-gaap:LongTermDebtFairValue

us-gaap:FairValueInputsLevel2


Long
Period End2021-06-302021-03-312020-12-312020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302014-12-31
Value430042002000190015001500150015000.01400120012001300130013001300120012001300130013001200120012001300
Percentage of LongTermDebtFairValue100.0100.0100.0100.0100.0100.0100.0100.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:MaterialsSuppliesAndOther

us-gaap:MaterialsSuppliesAndOther


Materials
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302014-12-312013-12-31
Value525152555453555650464440363539383634343032293333312716
Percentage of MaterialsSuppliesAndOther100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:NetRegulatoryAssets

us-gaap:NetRegulatoryAssets


Net
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-31
Value17991830-139.595-139.847-163.076-107.365-110.243-85.482-92.735-98.256-77.361-139.284-144.618-118.382-35.495004884905114844394374354184224184803123173266.308
Percentage of NetRegulatoryAssets100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:PensionAndOtherPostretirementDefinedBenefitPlansCurrentLiabilities us-gaap:RetirementPlanType

us-gaap:PensionAndOtherPostretirementDefinedBenefitPlansCurrentLiabilities

us-gaap:PensionPlansDefinedBenefit


Pension
Period End2020-12-312019-12-312018-12-312017-12-31
Value1056000.01045000.0962000.0963000.0
Percentage of PensionAndOtherPostretirementDefinedBenefitPlansCurrentLiabilities100.0100.0100.0100.0

us-gaap:PublicUtilitiesInventory

us-gaap:PublicUtilitiesInventory


Public
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-31
Value85449310572481041188851107126805013015711491125144103801421591198118521715281166
Percentage of PublicUtilitiesInventory100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:PublicUtilitiesPropertyPlantAndEquipmentAccumulatedDepreciation

us-gaap:PublicUtilitiesPropertyPlantAndEquipmentAccumulatedDepreciation


Public
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-31
Value2033200419711955192619011867184718401816178917681745172617061730171016941672165816471639162016041590157815561545153015161489
Percentage of PublicUtilitiesPropertyPlantAndEquipmentAccumulatedDepreciation100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:PublicUtilitiesPropertyPlantAndEquipmentAccumulatedDepreciation us-gaap:PublicUtilityRegulatedOrUnregulatedStatus

us-gaap:RegulatedOperation


Public
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-31
Value19711867178917061672162015561489
Percentage of PublicUtilitiesPropertyPlantAndEquipmentAccumulatedDepreciation100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:PublicUtilitiesPropertyPlantAndEquipmentNet

us-gaap:PublicUtilitiesPropertyPlantAndEquipmentNet


Public
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-31
Value4989491048674779470746344565448844004331428341954125405640073912383437733731368036113557351134353380332532933237317431123044
Percentage of PublicUtilitiesPropertyPlantAndEquipmentNet100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:PublicUtilitiesPropertyPlantAndEquipmentNet us-gaap:PublicUtilityRegulatedOrUnregulatedStatus

us-gaap:RegulatedOperation


Public
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-31
Value48674565428340073731351132933044
Percentage of PublicUtilitiesPropertyPlantAndEquipmentNet100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:PublicUtilitiesPropertyPlantAndEquipmentPlantInService

us-gaap:PublicUtilitiesPropertyPlantAndEquipmentPlantInService


Public
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-31
Value7023691568386735663365366433633662416148607359645870578257135643554554685404533852595196513250404970490448504782470446284534
Percentage of PublicUtilitiesPropertyPlantAndEquipmentPlantInService100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:PublicUtilitiesPropertyPlantAndEquipmentPlantInService us-gaap:PropertyPlantAndEquipmentByType, us-gaap:PublicUtilityRegulatedOrUnregulatedStatus

us-gaap:ConstructionInProgress, us-gaap:RegulatedOperation


Public
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-31
Value7715212613070577174
Percentage of PublicUtilitiesPropertyPlantAndEquipmentPlantInService1.12.42.12.31.31.11.51.6

us-gaap:GasDistributionEquipment, us-gaap:RegulatedOperation


Public
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-31
Value55175117486145724321411439093703
Percentage of PublicUtilitiesPropertyPlantAndEquipmentPlantInService80.779.580.080.080.080.280.681.7

us-gaap:GasTransmissionEquipment, us-gaap:RegulatedOperation


Public
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-31
Value586549517497481462450430
Percentage of PublicUtilitiesPropertyPlantAndEquipmentPlantInService8.68.58.58.78.99.09.39.5

us-gaap:LandBuildingsAndImprovements, us-gaap:RegulatedOperation


Public
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-31
Value657612567513530498418326
Percentage of PublicUtilitiesPropertyPlantAndEquipmentPlantInService9.69.59.39.09.89.78.67.2

us-gaap:PublicUtilitiesPropertyPlantAndEquipmentPlantInService us-gaap:PublicUtilityRegulatedOrUnregulatedStatus

us-gaap:RegulatedOperation


Public
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-31
Value68386433607357135404513248504534
Percentage of PublicUtilitiesPropertyPlantAndEquipmentPlantInService100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:RatioOfIndebtednessToNetCapital1

us-gaap:RatioOfIndebtednessToNetCapital1


Ratio
Period End2020-09-30
Value46.0
Percentage of RatioOfIndebtednessToNetCapital1100.0

us-gaap:RegulatoryAssets us-gaap:RegulatoryAsset

us-gaap:RegulatoryAssets

ogs:Advaloremtax


Regulatory
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302018-12-31
Value6.3124.8345.5585.264.0953.5932.9212.5722.0831.07
Percentage of RegulatoryAssets100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

ogs:CustomerCreditDeferrals


Regulatory
Period End2021-06-302021-03-312020-12-312020-09-30
Value17191014
Percentage of RegulatoryAssets284.1402.4184.7283.3

ogs:MGPCostsMember


Regulatory
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value18181811119.7839.8079.8329.8567.7097.7247.7247.7246.116.104
Percentage of RegulatoryAssets297.2388.6338.4223.1287.1272.3335.7382.3473.20.0721.90.00.00.00.0

ogs:Otherregulatoryassets


Regulatory
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-31
Value3.7992.9634.3025.1812127.6081113165.6138.2849.275107.7188.597.9799.0498.248.6797.1227.4992.6782.9362.7223.4324.875.9745.4646.20911
Percentage of RegulatoryAssets60.261.377.498.5307.0346.6260.5445.6656.20.0524.60.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

ogs:Totalregulatoryassetsnetofamortization


Regulatory
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-31
Value2381239042343542142043847046246849142442444449351150350452350446546446847247448752836335436345
Percentage of RegulatoryAssets37729.349457.27623.88286.410285.811703.115011.218283.922212.00.045971.90.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

ogs:Underrecoveredpurchasedgascosts


Regulatory
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302019-12-312019-09-302019-06-302018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302014-12-312014-09-302014-06-302014-03-312013-12-31
Value5.245199216227.24717180.76725166.74112414326172929101.09213102836161412
Percentage of RegulatoryAssets83.141209.6296.9427.5177.0587.9702.136.82344.20.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

ogs:Weathernormalization


Regulatory
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-31
Value1.120.6284.8064.2894.6743.7134.7617192019171718152.198
Percentage of RegulatoryAssets17.713.086.581.5114.1103.30.00.00.00.00.00.00.00.00.00.0

ogs:WinterWeatherEventCosts


Regulatory
Period End2021-06-30
Value1987
Percentage of RegulatoryAssets31494.6

us-gaap:LossOnReacquiredDebt


Regulatory
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-31
Value5.2735.4755.6785.886.0836.2866.4896.6916.8947.0977.2997.5027.7047.9078.118.3128.5158.7188.929.1249.3269.5299.7319.93410101010101111
Percentage of RegulatoryAssets83.5113.3102.2111.8148.5175.0222.1260.1331.00.0682.10.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:PensionCosts


Regulatory
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-31
Value3353463573663743843944214294374453823924024124304404494584414204304404484614734843103213319.854
Percentage of RegulatoryAssets5308.87169.06437.76960.89151.910706.013504.916393.820614.80.041599.10.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:RegulatoryAssets us-gaap:RetirementPlanType

us-gaap:OtherPostretirementBenefitPlansDefinedBenefit


Regulatory
Period End2020-12-312019-12-312018-12-312017-12-31
Value13193343
Percentage of RegulatoryAssets234.8666.13109.30.0

us-gaap:PensionPlansDefinedBenefit


Regulatory
Period End2020-12-312019-12-312018-12-312017-12-31
Value341373412369
Percentage of RegulatoryAssets6137.512770.538555.60.0

us-gaap:RegulatoryAssetsCurrent

us-gaap:RegulatoryAssetsCurrent


Regulatory
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-31
Value50435671473947543838544939498899827483735442323121225051312921
Percentage of RegulatoryAssetsCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:RegulatoryAssetsCurrent us-gaap:RegulatoryAsset

ogs:Advaloremtax


Regulatory
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302018-12-31
Value6.3124.8345.5585.264.0953.5932.9212.5722.0831.07
Percentage of RegulatoryAssetsCurrent12.411.09.87.38.59.06.24.85.42.0

ogs:CustomerCreditDeferrals


Regulatory
Period End2021-06-302021-03-312020-12-312020-09-30
Value17191014
Percentage of RegulatoryAssetsCurrent35.344.318.120.8

ogs:MGPCostsMember


Regulatory
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value0.0980.0980.0980.0980.0980.0980.0980.0980.0980.0980.00.00.00.00.0
Percentage of RegulatoryAssetsCurrent0.20.20.20.10.20.20.20.20.30.30.00.00.00.00.0

ogs:Otherregulatoryassets


Regulatory
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-31
Value2.7211.6062.1892.7739.879105.2249.61711144.0715.3626.0786.1593.5133.5913.1814.0193.2742.2322.0562.1010.9091.0920.7181.2922.5613.3322.7523.3698.154
Percentage of RegulatoryAssetsCurrent5.43.73.93.920.626.111.017.830.438.47.510.915.412.54.03.63.95.43.93.03.84.92.83.43.45.85.16.48.711.337.7

ogs:Totalregulatoryassetsnetofamortization


Regulatory
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-31
Value50435671473947543838544939498899827483735442323121225051312921
Percentage of RegulatoryAssetsCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

ogs:Underrecoveredpurchasedgascosts


Regulatory
Period End2021-06-302020-12-312020-09-302020-06-302019-12-312019-09-302019-06-302018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302014-12-312014-09-302014-06-302014-03-312013-12-31
Value5.24516227.24717180.76725166.74112414326172929101.09213102836161412
Percentage of RegulatoryAssetsCurrent10.329.131.315.136.233.42.046.134.117.125.346.844.232.224.036.039.419.52.640.532.757.270.052.046.857.2

ogs:Weathernormalization


Regulatory
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-31
Value1.120.6284.8064.2894.6743.7134.7617192019171718152.198
Percentage of RegulatoryAssetsCurrent2.21.48.56.09.79.39.719.819.724.726.521.223.033.236.76.7

us-gaap:PensionCosts


Regulatory
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-31
Value1616162121212122222223252525253131323124222315191920181111110.298
Percentage of RegulatoryAssetsCurrent32.537.629.129.544.153.344.742.459.959.343.051.263.750.928.531.738.343.037.933.442.153.947.661.392.890.636.122.036.739.21.4

us-gaap:RegulatoryAssetsNoncurrent

us-gaap:RegulatoryAssetsNoncurrent


Regulatory
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-31
Value2330234636636437338039141642442943737538539440541142143044043141042143544045246547831232233323
Percentage of RegulatoryAssetsNoncurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:RegulatoryAssetsNoncurrent ogs:OtherEmployeeBenefitPlans

ogs:NonserviceCosts


Regulatory
Period End2020-12-312019-12-312018-12-31
Value6.04.71.5
Percentage of RegulatoryAssetsNoncurrent1.61.20.3

us-gaap:RegulatoryAssetsNoncurrent us-gaap:RegulatoryAsset

ogs:MGPCostsMember


Regulatory
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-01-01
Value18181811119.6859.7099.7349.7587.6117.7247.7247.7246.116.1045.9
Percentage of RegulatoryAssetsNoncurrent0.80.85.13.23.12.52.52.32.31.81.82.12.01.51.50.0

ogs:Otherregulatoryassets


Regulatory
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-31
Value1.0781.3572.1132.4072.6942.062.3841.8442.0231.3691.5422.9223.1973.9344.2054.9994.7985.034.9666.4475.0665.3981.7691.8442.0042.142.3092.6422.7122.843.725
Percentage of RegulatoryAssetsNoncurrent0.00.10.60.70.70.50.60.40.50.30.40.80.81.01.01.21.11.21.11.51.21.30.40.40.40.50.50.80.80.915.6

ogs:Totalregulatoryassetsnetofamortization


Regulatory
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-31
Value2330234636636437338039141642442943737538539440541142143044043141042143544045246547831232233323
Percentage of RegulatoryAssetsNoncurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

ogs:Underrecoveredpurchasedgascosts


Regulatory
Period End2021-03-312020-06-302019-12-312019-09-302019-06-302018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302014-12-312014-09-302014-06-302014-03-312013-12-31
Value19920.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0
Percentage of RegulatoryAssetsNoncurrent84.90.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

ogs:WinterWeatherEventCosts


Regulatory
Period End2021-06-30
Value1987
Percentage of RegulatoryAssetsNoncurrent85.3

us-gaap:LossOnReacquiredDebt


Regulatory
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-31
Value4.4614.6634.8665.0685.2715.4745.6775.8796.0826.2856.4876.696.8927.0957.2987.57.7037.9068.1088.3128.5148.7178.9199.1229.3259.5279.739.933101010
Percentage of RegulatoryAssetsNoncurrent0.20.21.31.41.41.41.51.41.41.51.51.81.81.81.81.81.81.81.81.92.12.12.02.12.12.02.03.23.13.144.2

us-gaap:PensionCosts


Regulatory
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-31
Value3183303413453533633733984064144213573673773873994084174274163974074254294414534662993093199.556
Percentage of RegulatoryAssetsNoncurrent13.714.193.094.894.795.595.595.895.896.496.495.495.495.795.797.097.097.097.096.696.796.797.597.597.597.597.596.096.096.040.1

us-gaap:RegulatoryLiabilities us-gaap:RegulatoryLiability

us-gaap:RegulatoryLiabilities

ogs:Federalincometaxratechanges


Regulatory
Period End2020-12-312020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value547500513521524544551541537530519
Percentage of RegulatoryLiabilities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

ogs:IncometaxratechangesMemberDomain


Regulatory
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302019-12-31
Value558537547555560513
Percentage of RegulatoryLiabilities0.00.0100.00.00.0100.0

ogs:Overrecoveredpurchasedgascosts


Regulatory
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-31
Value232315202327272722141331319.43410141210111818223335441313171517
Percentage of RegulatoryLiabilities0.00.02.90.00.05.55.45.34.32.62.55.86.01.80.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

ogs:Totalregulatedliabilities


Regulatory
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-31
Value58256056357558452754855555556656956356956252810141311202527335351694750363639
Percentage of RegulatoryLiabilities0.00.0102.90.00.0105.5106.8106.6105.9104.1103.2104.1105.9106.0101.80.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:RegulatoryLiabilityCurrent

us-gaap:RegulatoryLiabilityCurrent


Regulatory
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302013-12-31
Value23231520263345484654484147449.438111319202441375432331717
Percentage of RegulatoryLiabilityCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:RegulatoryLiabilityCurrent us-gaap:RegulatoryLiability

ogs:Overrecoveredpurchasedgascosts


Regulatory
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-31
Value232315202327272722141331319.43410141210111818223335441313171517
Percentage of RegulatoryLiabilityCurrent100.0100.0100.0100.091.381.361.156.548.625.928.265.771.8100.00.00.00.085.287.492.493.893.080.794.781.140.239.9100.00.0100.0

ogs:Totalregulatedliabilities


Regulatory
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-31
Value23231520263345484654484147449.43810141311131920244137543233171517
Percentage of RegulatoryLiabilityCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.00.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0100.0

us-gaap:RegulatoryLiabilityNoncurrent

us-gaap:RegulatoryLiabilityNoncurrent


Regulatory
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312016-12-31
Value5585375475555584945035065085115205215215185190.0
Percentage of RegulatoryLiabilityNoncurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0

us-gaap:RegulatoryLiabilityNoncurrent us-gaap:RegulatoryLiability

ogs:Federalincometaxratechanges


Regulatory
Period End2020-12-312020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value547494503506508511520521521518519
Percentage of RegulatoryLiabilityNoncurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

ogs:IncometaxratechangesMemberDomain


Regulatory
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302019-12-31
Value558537547555558503
Percentage of RegulatoryLiabilityNoncurrent100.0100.0100.0100.0100.0100.0

ogs:Totalregulatedliabilities


Regulatory
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-31
Value5585375475555584945035065085115205215215185190.00.00.00.07.0196.1236.9239.0321114151517182121
Percentage of RegulatoryLiabilityNoncurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber us-gaap:AwardType

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber

us-gaap:PerformanceShares


Share
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-31
Value208520.0218180.0219330.0237320.0288810.0439250.0847950.0
Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber100.0100.0100.0100.0100.0100.0100.0

us-gaap:RestrictedStockUnitsRSU


Share
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-31
Value99800.0104400.0109510.0140660.0194900.0231260.0325730.0
Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber47.947.949.959.367.552.638.4

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue us-gaap:AwardType

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue

us-gaap:PerformanceShares


Share
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-31
Value87.9777.5869.2157.7846.0627.3517.62
Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue100.0100.0100.0100.0100.0100.0100.0

us-gaap:RestrictedStockUnitsRSU


Share
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-31
Value82.2972.2163.4551.9741.6832.5923.47
Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue93.593.191.789.990.5119.2133.2

us-gaap:UnbilledReceivablesCurrent

us-gaap:UnbilledReceivablesCurrent


Unbilled
Period End2021-06-302021-03-312020-12-312020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312016-12-312015-12-312014-12-312013-12-31
Value57911444971109534888127545284138143109141143
Percentage of UnbilledReceivablesCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Line plots across dimensions of each concept


us-gaap:OtherNonoperatingIncomeExpense
ogs:OTHERINCOMEANDOTHEREXPENSE
(None,)
Other Nonoperating Income Expenseogs: O T H E R I N C O M E A N D O T H E R E X P E N S E
us-gaap:StockholdersEquity
us-gaap:StatementEquityComponents
(None,)
Stockholders Equityus-gaap: Statement Equity Components
us-gaap:PensionAndOtherPostretirementDefinedBenefitPlansLiabilitiesNoncurrent
us-gaap:RetirementPlanType
(None,)
Pension And Other Postretirement Defined Benefit Plans Liabilities Noncurrentus-gaap: Retirement Plan Type
us-gaap:StockholdersEquity
us-gaap:StatementEquityComponents
(None,)
Stockholders Equityus-gaap: Statement Equity Components
us-gaap:StockIssuedDuringPeriodValueNewIssues
us-gaap:StatementEquityComponents
(None,)
Stock Issued During Period Value New Issuesus-gaap: Statement Equity Components
us-gaap:DebtInstrumentInterestRateStatedPercentage
us-gaap:LongtermDebtType
(None,)
Debt Instrument Interest Rate Stated Percentageus-gaap: Longterm Debt Type