SM


Line plots across dimensions of each concept
Tables

Table of contents



us-gaap:CommonStockValue

us-gaap:CommonStockSharesIssued

us-gaap:CommonStockSharesOutstanding
us-gaap:StatementEquityComponents

us-gaap:WeightedAverageNumberOfDilutedSharesOutstanding

us-gaap:WeightedAverageNumberOfSharesOutstandingBasic

us-gaap:AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount

us-gaap:EarningsPerShareBasic

us-gaap:EarningsPerShareDiluted

us-gaap:RevenueFromContractWithCustomerIncludingAssessedTax
us-gaap:ProductOrService
us-gaap:ProductOrService, us-gaap:StatementGeographical
us-gaap:StatementGeographical

us-gaap:Revenues

us-gaap:CostOfGoodsAndServicesSold

us-gaap:CostsAndExpenses

us-gaap:GeneralAndAdministrativeExpense

us-gaap:OperatingIncomeLoss

us-gaap:InterestExpense
us-gaap:DebtInstrument
us-gaap:InterestExpenseDebt

us-gaap:InterestPaidNet

us-gaap:OtherNonoperatingIncomeExpense

us-gaap:GainsLossesOnExtinguishmentOfDebt
us-gaap:DebtInstrument
us-gaap:AwardType
us-gaap:AllocatedShareBasedCompensationExpense

us-gaap:IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest

us-gaap:IncomeTaxExpenseBenefit

us-gaap:OtherComprehensiveIncomeLossNetOfTax
us-gaap:StatementEquityComponents

us-gaap:NetIncomeLoss
us-gaap:StatementEquityComponents

us-gaap:ComprehensiveIncomeNetOfTax

us-gaap:Assets

us-gaap:LiabilitiesAndStockholdersEquity

us-gaap:StockholdersEquity
us-gaap:StatementEquityComponents

us-gaap:AssetsCurrent

us-gaap:CashAndCashEquivalentsAtCarryingValue

us-gaap:AccountsReceivableNetCurrent
us-gaap:AccountsNotesLoansAndFinancingReceivableByReceivableType

us-gaap:PrepaidExpenseAndOtherAssetsCurrent

us-gaap:AssetsNoncurrent

us-gaap:PropertyPlantAndEquipmentNet

us-gaap:OperatingLeaseRightOfUseAsset

us-gaap:OtherAssetsNoncurrent

us-gaap:LiabilitiesCurrent

us-gaap:AccountsPayableAndAccruedLiabilitiesCurrent

us-gaap:OperatingLeaseLiabilityCurrent

us-gaap:OtherLiabilitiesCurrent

us-gaap:LiabilitiesNoncurrent

us-gaap:LongTermDebt

us-gaap:DeferredIncomeTaxLiabilitiesNet

us-gaap:OtherLiabilitiesNoncurrent

us-gaap:OperatingLeaseLiabilityNoncurrent

us-gaap:StockholdersEquity
us-gaap:StatementEquityComponents

us-gaap:CommonStockValue

us-gaap:AdditionalPaidInCapitalCommonStock

us-gaap:RetainedEarningsAccumulatedDeficit

us-gaap:AccumulatedOtherComprehensiveIncomeLossNetOfTax

us-gaap:NetCashProvidedByUsedInOperatingActivities

us-gaap:NetCashProvidedByUsedInInvestingActivities

us-gaap:NetCashProvidedByUsedInFinancingActivities

us-gaap:CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect

us-gaap:NetCashProvidedByUsedInOperatingActivities

us-gaap:NetIncomeLoss
us-gaap:StatementEquityComponents

us-gaap:DeferredIncomeTaxExpenseBenefit

us-gaap:ShareBasedCompensation

us-gaap:NetCashProvidedByUsedInInvestingActivities

us-gaap:NetCashProvidedByUsedInFinancingActivities
us-gaap:DebtInstrument
us-gaap:DebtInstrumentInterestRateStatedPercentage

us-gaap:EffectiveIncomeTaxRateContinuingOperations

sm:CashPortionOfGainLossOnDerivativeInstrument

sm:ChangeInCapitalExpendituresIncurredButNotYetPaid

sm:Derivativesettlementgainorloss
us-gaap:DerivativeInstrumentRisk
us-gaap:DebtInstrument, us-gaap:ExtinguishmentOfDebt
sm:GainsLossesonExtinguishmentofDebtNonCashPortion

sm:ImpairmentofProvedOilandGasProperties

sm:ImpairmentofUnprovedOilandGasProperties
us-gaap:DebtInstrument
sm:InterestPaidSeniorNotesAccruedAndUnpaid
us-gaap:CreditFacility, us-gaap:LongtermDebtType
sm:LetterofCreditDividendRestrictionsAmount
us-gaap:CreditFacility, us-gaap:LongtermDebtType, us-gaap:SubsequentEventType

sm:OperatingLeasePaymentsInvestingActivities
us-gaap:StatementEquityComponents
sm:StockIssuedDuringPeriodSharesRestrictedStockUnitsAndPerformanceShareUnits

sm:StockIssuedDuringPeriodValueRestrictedStockUnitsAndPerformanceShareUnits
us-gaap:StatementEquityComponents

us-gaap:AdjustmentsToAdditionalPaidInCapitalWarrantIssued
us-gaap:StatementEquityComponents

us-gaap:AmortizationOfFinancingCostsAndDiscounts

us-gaap:CommonStockDividendsPerShareDeclared
us-gaap:StatementGeographical, us-gaap:ConcentrationRiskByBenchmark, us-gaap:ConcentrationRiskByType
us-gaap:ConcentrationRiskPercentage1

us-gaap:CurrentFederalTaxExpenseBenefit

us-gaap:CurrentStateAndLocalTaxExpenseBenefit
sm:DebtInstrumentBorrowingBaseUtilizationPercentage, us-gaap:CreditFacility, us-gaap:LongtermDebtType, us-gaap:SubsequentEventType, us-gaap:VariableRate
us-gaap:DebtInstrumentBasisSpreadOnVariableRate1
sm:DebtInstrumentBorrowingBaseUtilizationPercentage, us-gaap:CreditFacility, us-gaap:LongtermDebtType, us-gaap:VariableRate

us-gaap:DefinedBenefitPlanAmortizationOfGainsLosses

us-gaap:DefinedBenefitPlanAmortizationOfPriorServiceCostCredit

us-gaap:DefinedBenefitPlanExpectedReturnOnPlanAssets

us-gaap:DefinedBenefitPlanInterestCost

us-gaap:DefinedBenefitPlanNetPeriodicBenefitCost

us-gaap:DefinedBenefitPlanServiceCost
sm:DerivativeUnderlyingIndex, us-gaap:DerivativeInstrumentRisk
us-gaap:DerivativeNonmonetaryNotionalAmountEnergyMeasure
sm:DerivativeUnderlyingIndex, us-gaap:DerivativeInstrumentRisk, us-gaap:SubsequentEventType

us-gaap:DividendsCommonStockCash
us-gaap:StatementEquityComponents

us-gaap:EarlyRepaymentOfSeniorDebt

us-gaap:ExplorationExpense

us-gaap:GainLossOnDerivativeInstrumentsNetPretax
us-gaap:DerivativeInstrumentRisk

us-gaap:GainLossOnSaleOfOilAndGasProperty

us-gaap:ImpairmentOfOilAndGasProperties

us-gaap:IncreaseDecreaseInOperatingCapital

us-gaap:IncrementalCommonSharesAttributableToShareBasedPaymentArrangements

us-gaap:InterestCostsCapitalized

us-gaap:LeaseCost
sm:DebtInstrumentBorrowingBaseUtilizationPercentage, us-gaap:CreditFacility, us-gaap:LongtermDebtType
us-gaap:LineOfCreditFacilityUnusedCapacityCommitmentFeePercentage
sm:DebtInstrumentBorrowingBaseUtilizationPercentage, us-gaap:CreditFacility, us-gaap:LongtermDebtType, us-gaap:SubsequentEventType

us-gaap:NoncashOrPartNoncashAcquisitionNetNonmonetaryAssetsAcquiredLiabilitiesAssumed1

us-gaap:OperatingLeaseCost

us-gaap:OperatingLeasePayments

us-gaap:OtherComprehensiveIncomeDefinedBenefitPlansAdjustmentNetOfTaxPortionAttributableToParent

us-gaap:OtherNoncashIncomeExpense

us-gaap:OtherOperatingIncome

us-gaap:OtherOperatingIncomeExpenseNet

us-gaap:PaymentsForProceedsFromOtherInvestingActivities

us-gaap:PaymentsToExploreAndDevelopOilAndGasProperties

us-gaap:ProceedsFromLinesOfCredit

us-gaap:ProceedsFromPaymentsForOtherFinancingActivities

us-gaap:ProceedsFromSaleOfOilAndGasPropertyAndEquipment
us-gaap:DebtInstrument
us-gaap:RepaymentsOfConvertibleDebt

us-gaap:RepaymentsOfLinesOfCredit

us-gaap:ResultsOfOperationsDepreciationDepletionAmortizationAndAccretion

us-gaap:RightOfUseAssetObtainedInExchangeForOperatingLeaseLiability
us-gaap:AwardType, us-gaap:SubsequentEventType
us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardSharesIssuedInPeriod
us-gaap:AwardType, us-gaap:SubsequentEventType
us-gaap:SharesPaidForTaxWithholdingForShareBasedCompensation

us-gaap:ShortTermLeaseCost
us-gaap:StatementEquityComponents
us-gaap:StockIssuedDuringPeriodSharesEmployeeStockPurchasePlans
us-gaap:StatementEquityComponents
us-gaap:StockIssuedDuringPeriodSharesShareBasedCompensation
us-gaap:TitleOfIndividual
us-gaap:StockIssuedDuringPeriodSharesShareBasedCompensationGross

us-gaap:StockIssuedDuringPeriodValueEmployeeStockPurchasePlan
us-gaap:StatementEquityComponents

us-gaap:StockIssuedDuringPeriodValueShareBasedCompensation
us-gaap:StatementEquityComponents

us-gaap:VariableLeaseCost
sm:DerivativeUnderlyingIndex, us-gaap:DerivativeInstrumentRisk
sm:DerivativeOilBasisSwapTypeWeightedAverageContractPrice
sm:DerivativeUnderlyingIndex, us-gaap:SubsequentEventType
us-gaap:DerivativeInstrumentRisk
sm:DerivativeRollDifferentialSwapTypeWeightedAverageContractPrice
sm:DerivativeUnderlyingIndex
sm:IndexPercentOfNaturalGasFixedSwaps
us-gaap:CreditFacility, us-gaap:LongtermDebtType
sm:LineofCreditFacilityAggregateLenderCommitments
us-gaap:CreditFacility, us-gaap:LongtermDebtType, us-gaap:SubsequentEventType

sm:PermittedSecondLienDebt
us-gaap:LongtermDebtType
us-gaap:Range
sm:PotentialPenaltyForNotMeetingMinimumDrillingAndCompletionCounts
us-gaap:Range
sm:PotentialPenaltyfornotMeetingMinimumDrillingandCompletionRequirements
us-gaap:Range, us-gaap:SubsequentEventType

sm:WarrantsPercentOfOutstandingStock

sm:WellsInProgress

us-gaap:AssetRetirementObligationsNoncurrent

us-gaap:CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsIncludingDisposalGroupAndDiscontinuedOperations

us-gaap:ClassOfWarrantOrRightExercisePriceOfWarrantsOrRights1

us-gaap:ClassOfWarrantOrRightNumberOfSecuritiesCalledByWarrantsOrRights

us-gaap:ConvertibleDebtNoncurrent
us-gaap:DebtInstrument
us-gaap:DebtInstrument
us-gaap:DebtInstrumentFaceAmount
us-gaap:DebtInstrument
us-gaap:DebtInstrumentRepurchasedFaceAmount
us-gaap:DebtInstrument
us-gaap:DebtInstrumentUnamortizedDiscount

us-gaap:DerivativeAssetFairValueOffsetAgainstCollateralNetOfNotSubjectToMasterNettingArrangementPolicyElection

us-gaap:DerivativeAssetNotOffsetPolicyElectionDeduction

us-gaap:DerivativeAssetsCurrent
us-gaap:HedgingDesignation

us-gaap:DerivativeAssetsNoncurrent
us-gaap:HedgingDesignation
us-gaap:DerivativeInstrumentRisk
us-gaap:DerivativeCapPrice

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

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

us-gaap:DerivativeFairValueOfDerivativeNet

us-gaap:DerivativeLiabilitiesCurrent
us-gaap:HedgingDesignation

us-gaap:DerivativeLiabilitiesNoncurrent
us-gaap:HedgingDesignation

us-gaap:DerivativeLiabilityFairValueOffsetAgainstCollateralNetOfNotSubjectToMasterNettingArrangementPolicyElection

us-gaap:DerivativeLiabilityNotOffsetPolicyElectionDeduction

us-gaap:DisposalGroupIncludingDiscontinuedOperationPropertyPlantAndEquipment
us-gaap:AwardType
us-gaap:EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized
us-gaap:CreditFacility, us-gaap:LongtermDebtType
us-gaap:LettersOfCreditOutstandingAmount
us-gaap:CreditFacility, us-gaap:LongtermDebtType, us-gaap:SubsequentEventType
us-gaap:CreditFacility, us-gaap:LongtermDebtType, us-gaap:SubsequentEventType
us-gaap:LineOfCreditFacilityCurrentBorrowingCapacity
us-gaap:CreditFacility, us-gaap:LongtermDebtType
us-gaap:LineOfCreditFacilityRemainingBorrowingCapacity
us-gaap:CreditFacility, us-gaap:LongtermDebtType, us-gaap:SubsequentEventType
us-gaap:DebtInstrument
us-gaap:LongTermDebtFairValue

us-gaap:LongTermLineOfCredit
us-gaap:CreditFacility, us-gaap:LongtermDebtType
us-gaap:CreditFacility, us-gaap:LongtermDebtType, us-gaap:SubsequentEventType

us-gaap:OilAndGasPropertySuccessfulEffortMethodAccumulatedDepreciationDepletionAndAmortization
us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FairValueByMeasurementFrequency
us-gaap:PropertyPlantAndEquipmentFairValueDisclosure

us-gaap:PropertyPlantAndEquipmentOtherAccumulatedDepreciation

us-gaap:PropertyPlantAndEquipmentOtherNet

us-gaap:ProvedOilAndGasPropertySuccessfulEffortMethod

us-gaap:RestrictedCashNoncurrent

us-gaap:SeniorLongTermNotes
us-gaap:DebtInstrument
us-gaap:CreditFacility, us-gaap:LongtermDebtType
us-gaap:UnamortizedDebtIssuanceExpense
us-gaap:DebtInstrument

us-gaap:UnprovedOilAndGasPropertySuccessfulEffortMethod

Tables

  2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
us-gaap:CommonStockValue ███████████████▄▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁1.1361.131.131.1291.1251.1221.1221.1211.1181.1171.1171.1161.1151.1131.1130.8690.6830.6810.6810.680.6760.6750.6750.6740.6710.6710.6710.670.6640.6630.662NA0.6520.6420.6410.6410.6380.6370.634NANANA
us-gaap:CommonStockSharesIssued ███████████████▄▂▂▂▂▂▂▂▂▂▂▂▂▁▁▁▁▁▁▁▁▁▁▁113.553271112.988682112.987952112.857163112.525633112.244545112.241966112.137582111.846998111.687016111.687016111.624029111.453476111.258225111.257586.86848268.27455168.07754668.075767.96871467.59864967.46418567.4630667.39386767.11673267.07885367.07885366.99451666.41239466.30000366.24581666.12180965.1553464.23111464.07988564.07988563.76442163.72017663.4128NANANA
us-gaap:CommonStockSharesOutstanding ███████████████▄▂▂▂▂▂▂▂▂▂▂▂▂▁▁▁▁▁▁▁▁▁▁▁113.553271112.988682112.987952112.857163112.525633112.244545112.241966112.137582111.846998111.687016111.687016111.624029111.453476111.258225111.257586.86848268.27455168.07754668.075767.96871467.59864967.46418567.4630667.39386767.11673267.05644167.05644166.97210466.38998266.24942266.19523566.07122865.10077364.15004763.99881863.99881863.68335463.6179363.310165NANANA
us-gaap:WeightedAverageNumberOfDilutedSharesOutstanding ▁█113.008113.009NA113.334112.932112.252NA112.107113.63112.879NA111.575111.277111.329NA78.46868.10268.077NA68.11967.48367.463NA68.4368.23968.126NA68.25367.89367.521NA65.74567.55667.845NA67.38666.90963.447NA64.79464.56664.377
us-gaap:WeightedAverageNumberOfSharesOutstandingBasic ▁█113.008113.009NA112.804112.262112.252NA112.107111.701111.696NA111.575111.277111.258NA78.46868.10268.077NA67.96167.48367.463NA67.37967.06967.056NA66.94366.29566.211NA65.74564.58564.104NA63.90463.63863.447NA63.03162.91762.792
us-gaap:AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount ▁█0.7011.219NA0.00.00.781NA2.4330.00.0NA0.00.0440.0NA0.5060.1550.049NA0.00.590.452NANANANANANANANANANANANANANANANANANANANA
us-gaap:EarningsPerShareBasic ▄▂▄▅▅▃▆▄▅▇▄▄▄▅▃▄▃▁▁▅▄▄█▇▅▅▅▅▅▅▄▄▅▅▃▇▆▄▅▅▅▆-0.79-3.64-0.89999999999999990.370.45-1.582.76-1.210.152.84-0.22999999999999998-0.8-1.080.67-2.12-0.52-2.48-5.1-5.02000000000000050.05-0.85-0.794.933.10.890.980.099999999999999641.061.150.25-1.03-0.580.390.41-1.90000000000000043.61.96-0.290.58999999999999990.250.292.01
us-gaap:EarningsPerShareDiluted ▄▂▄▅▅▃▆▄▅▇▄▄▄▅▃▄▃▁▁▅▄▄█▇▅▅▅▅▅▅▄▄▅▅▃▇▆▄▅▅▅▆-0.79-3.64-0.89999999999999990.370.45-1.582.7300000000000004-1.210.152.81-0.22999999999999998-0.8-1.080.67-2.12-0.52-2.48-5.1-5.02000000000000050.05-0.85-0.794.8899999999999993.050.880.960.099999999999999641.041.130.25-1.02-0.580.370.39-1.80000000000000033.411.86-0.290.56999999999999980.240.281.96
  2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
us-gaap:RevenueFromContractWithCustomerIncludingAssessedTax ▁▅█▆▇▅▆█▇▆▅▄169.79354.233449.001389.419406.854340.476392.531458.382402.558382.886341.187294.459NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:Revenues ▂▄▅▄▄▃▄▅▄█▃▃▁▄▄▄▃▁▃▄▅▄▆▆▇▇▇▆▆▅▄▄▃▄▄▅▄▃▃▂▂▄169.632355.734451.686390.317407.172340.93394.192459.369443.916769.595340.538295.379120.721372.738379.9352.66341.814143.076303.734371.151516.146365.934595.821618.786674.98632.72636.727613.107559.36484.18444.308378.951304.42377.423379.542530.574377.873315.329294.118226.884211.697360.135
us-gaap:CostOfGoodsAndServicesSold ▁▇██▇▇▇█▆▇▇▇80.445119.552127.312129.042123.05121.305121.45127.638117.4120.879122.833122.651NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:CostsAndExpenses ▅█▆▄▄▆▁▆▄▄▅▄▃▃▇▄▆▇█▄▆▅▂▃▆▅▆▅▅▅▆▅▃▄▆▃▃▄▃▃▃▃482.311836.826539.989290.84303.005526.239-35.573568.013387.768310.527441.39380.971268.359207.145664.287370.314572.363669.801809.307339.047567.025420.36937.336261.807553.264504.086596.438475.623415.076437.982530.105421.787252.029321.198559.681157.786166.166335.301230.939195.832174.908152.384
us-gaap:GeneralAndAdministrativeExpense ▂▂▄▃▃▃▃▂▂▂▄▂▂▂▃▃▂▃▃▄▆▆█▅▅▄▇▄▄▃▂▃▃▂▄▃▂▂▃▂▁▁27.22727.44737.21332.57830.9232.08630.43829.46428.9227.68235.02127.8828.4629.22433.31132.67928.232.23833.64237.78242.60543.63952.24141.69638.11535.05147.97733.9235.37432.2828.37232.17131.1328.14235.56829.78727.3125.86131.5626.21925.39823.486
us-gaap:OperatingIncomeLoss ▂▁▄▅▅▃▇▄▅▇▄▄▃▅▃▄▃▁▁▅▄▄█▇▅▅▅▅▅▅▄▄▅▅▃▇▆▄▅▅▅▆-312.679-481.092-88.30399.477104.167-185.309429.765-108.64456.148459.068-100.852-85.592-147.638165.593-284.387-17.654-230.549-526.725-505.57332.104-50.879-54.435558.485356.979121.716128.63440.289137.484144.28446.198-85.797-42.83652.39156.225-180.139372.788211.707-19.97263.17931.05236.789207.751
us-gaap:InterestExpense ▇▇▇▇▇▆▆▇▇▇▇▇████▆▅▅▆▅▆▅▄▄▄▄▄▄▃▃▃▂▃▂▂▃▂▁▁▁▁40.35441.51240.91140.58439.62737.9838.05638.11141.65443.08543.61844.09144.59546.95346.35647.20634.03531.08831.56633.15730.77932.64727.70322.62124.0424.1924.54124.48821.58119.10118.36818.36212.71214.27812.2139.37214.559.7144.7276.3396.3436.787
 us-gaap:InterestExpenseDebt us-gaap:DebtInstrument sm:A1.50SeniorConvertibleNotesDue2021NA2.92.82.82.72.72.72.62.62.62.52.52.52.4NANANANANANANANANANANANANANANANANANANANANANANANANANANANA
 us-gaap:InterestExpenseDebt us-gaap:DebtInstrument sm:A150SeniorSecuredConvertibleNotesDue20212.6NANANA2.7NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:InterestPaidNet ▆█▅█▄▇▄█▆▇▇▇▇▇▇▄▆▄▆▄▅▆▁▅▁▆34.84447.46928.7845.47627.68939.95726.29246.63237.74340.0639.65440.9540.62142.87241.65224.51939.13724.45338.06824.02130.8434.05910.02631.7169.55237.851NANANANANANANANANANANANANANANANA
us-gaap:OtherNonoperatingIncomeExpense ▄▄▃▃▃▄▅▆█▅▇▇▇▅▅▅▅▅▅▅▅▆▄▃▁▅▅▅▅-0.185-0.494-0.547-0.548-0.562-0.3170.0690.8061.8020.4091.0671.3011.2650.3350.130.2210.0050.0060.0260.0270.0250.571-0.068-0.672-1.8470.0260.0030.0280.024NANANANANANANANANANANANANA
us-gaap:GainsLossesOnExtinguishmentOfDebt █▂▂▂▂▂▂▁▂▂▂▂▂▂▂▂▂▂▂▂▁▂▂▂▂227.28112.1950.00.00.00.0-0.018-26.7220.00.00.00.00.0-0.0350.00.00.015.7220.00.0-16.5780.00.00.00.0NANANANANANANANANANANANANANANANANA
 us-gaap:AllocatedShareBasedCompensationExpense us-gaap:AwardType us-gaap:PerformanceShares▃▃▂▄▄▃▃▄▂▂▄▃▁▃▃▂▄▄▄▂▃▂▇█▅▄▅▅█▇2.82.62.32.92.92.82.63.02.42.42.92.61.72.52.82.33.02.93.22.42.72.34.44.83.63.23.63.55.04.7NA5.15.22.9NANANANANANANANA
 us-gaap:AllocatedShareBasedCompensationExpense us-gaap:AwardType us-gaap:RestrictedStockUnitsRSU▄▄▄▄▄▄▄▄▃▄▄▄▃▄▄▄▅▅▅▇▄▄▅█▄▄▅▆▅▄▅▆▁▁2.72.62.72.92.82.72.83.02.32.72.82.92.12.52.62.83.33.23.54.12.92.93.44.82.92.83.13.73.33.03.33.91.41.2NANANANANANANANA
us-gaap:IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest ▄▁▄▅▅▃▇▃▅▇▄▄▃▅▂▄▃▁▁▅▄▄█▇▅▅▅▅▅▅▄▄▅▅-125.937-510.903-129.76158.34563.978-223.606391.76-172.67116.296416.392-143.403-128.382-190.968118.94-330.613-64.639-264.579-542.085-537.113-1.026-98.211-86.511530.714333.68695.829104.4715.751113.024122.72727.109-104.146-61.07239.68442.017NANANANANANANANA
us-gaap:IncomeTaxExpenseBenefit ▄▃▄▅▅▄▆▄▄▆▂▄▃▅▂▄▃▁▁▄▄▄█▇▅▅▅▅▅▅▄▄▅▅▃▇▆▄▅▅▅▆-36.685-99.008-27.70616.11113.59-46.03882.028-36.748-0.90198.991-117.145-39.27-71.06144.506-129.667-23.732-95.898-194.875-196.855-4.14-40.703-33.453198.988124.74836.04938.8638.75542.33446.20510.382-37.008-22.73614.79515.681-71.557133.34672.851-11.05521.3669.34612.43274.915
us-gaap:OtherComprehensiveIncomeLossNetOfTax ▂▂▃▂▂▂█▂▂▂▄▂▂▁▁▂▁▂0.1880.190.4890.190.1190.2633.6570.2630.1980.261.418-0.2080.124-0.567-0.394-0.255-0.269-0.236NA-0.02-0.576-0.176NA0.1960.330.0NA0.3080.7460.058NA-0.314-0.116-1.034NANANANANANANANA
us-gaap:NetIncomeLoss ▄▁▄▅▅▃█▄▅█▅▄▄▆-89.252-411.895-102.05542.23450.388-177.568309.732-135.92317.197317.401-26.258-89.112-119.90774.434NANANANANANANANANANANANANANANANANANANANANANANANANANANANA
 us-gaap:NetIncomeLoss us-gaap:StatementEquityComponents us-gaap:RetainedEarnings█▁-89.252-411.895NA42.23450.388-177.568NA-135.92317.197317.401NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:ComprehensiveIncomeNetOfTax ▄▁▄▅▅▃█▄▅█▅▄▄▆▃▅▃▂▂▅▄▄█▇▅▆▅▆▆▅▄▅▅▅▄▇▆-89.064-411.705-101.56642.42450.507-177.305313.389-135.6617.395317.661-24.84-89.32-119.78373.867-201.34-41.162-168.95-347.446-341.5763.094-58.084-53.234325.304209.13460.1165.6079.48270.99877.26816.785-70.408-38.6524.77325.302-118.658234.368128.484NANANANANA
  2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
  2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
  2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
us-gaap:Assets ▅▆▇█▇▇▇▇██▇▇▇▇▇▆▅▅▆▇▇██▆▅▄▄▄▄▄▄▃▃▃▃▂▂▂▁5267.6285615.0256292.2326453.0836391.9396286.6186352.8626273.7216736.4856659.9886176.7766178.9266212.6056399.7086393.5115785.4335044.4755207.0565621.6436213.8616213.6186600.6866516.75660.7465004.0354689.0114705.1654736.8454590.6684292.3244199.5294123.9523999.5713845.0983798.983456.283219.8933053.5242744.321NANANA
us-gaap:LiabilitiesAndStockholdersEquity ▅▆▇█▇▇▇▇██▇▇▇▇▇▆▅▅▆▇▇██▆▅▄▄▄▄▄▄▃▃▃▃▂▂▂▁5267.6285615.0256292.2326453.0836391.9396286.6186352.8626273.7216736.4856659.9886176.7766178.9266212.6056399.7086393.5115785.4335044.4755207.0565621.6436213.8616213.6186600.6866516.75660.7465004.0354689.0114705.1654736.8454590.6684292.3244199.5294123.9523999.5713845.0983798.983456.283219.8933053.5242744.321NANANA
us-gaap:StockholdersEquity ▁▂▆▇▇▆█▄▆▆▂2280.8322341.7172748.9942843.752801.8432743.2252920.3222599.3992736.6272712.0972394.608NANANA2497.133NANANA1852.401NANANA2286.655NANANANANANANANANANANANANANANANANANANA
  2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
us-gaap:AssetsCurrent ▂▄▁▂▁▁▂▃▆▆▃▄▅▅▁█▂▂▃▃▃▄▅▂▃▃▄▂▂▂▂▂▂▂▃▂▂▂▁355.469625.16252.634311.114288.734221.334429.263453.142955.21923.192549.115668.912769.317849.546224.6421246.609304.474405.638518.989537.677525.708669.643745.043371.605506.915577.342647.501345.87395.636320.19340.564325.938334.237343.744463.204304.704346.123403.49274.645NANANA
us-gaap:CashAndCashEquivalentsAtCarryingValue ▁▁▁▁▁▁▂▂▅▆▃▄▅▆▁█▁▁▁▁▁▁▁▁▂▃▃▁▁▁▁▁▁▁▂▁▂▂▁▁▁▁0.010.0150.010.010.0120.01477.965176.806615.906643.337313.943441.415559.521659.1479.372980.6660.0180.0510.0180.1970.0820.0220.120.269163.794236.435282.2480.1760.1760.0875.9260.1840.1840.286119.19429.923101.08191.2945.0777.08910.24940.424
us-gaap:AccountsReceivableNetCurrent ▂▂▄▂▃▂▃▃▃▄▃▂▁▁▂▂▂▁▂▃▅▆█▇███▇▇▆▆▅▄▅▄▄▃▂▃127.173143.311184.732146.211165.757145.299167.536179.347178.682192.562160.154146.056105.713108.368151.95140.799143.979111.141134.124171.067239.983270.841322.63304.175312.415307.784318.371278.125291.197255.888254.805235.887209.633224.335210.368183.943173.557146.805163.19NANANA
us-gaap:PrepaidExpenseAndOtherAssetsCurrent ▂▂▂▃▁▁▁▂▂▁▁▂▂▁▁▂▂▂▂▂▂▂▂▂▂▂▁▁▄▃▄▅▆▅█▄▄16.70417.84212.70821.7518.7238.4548.63215.82614.2939.99710.75217.75618.1218.0538.79915.32614.90112.8517.13719.11416.62118.14719.62516.78215.00714.4469.94410.49830.3428.52330.01739.01446.81244.14168.02630.93732.281NA45.522NANANA
  2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
us-gaap:AssetsNoncurrent ▂▃▂▃▃▃▃▁▂▂▂▃▃▃▂▅▄▅▄▆▆█▇▂▂▃▆▆▆▅▅▅▇▆▇▃▂▂▁86.334101.52785.95112.826117.876110.89492.43444.39262.82567.24772.86992.93196.877100.04287.515174.13138.669197.639152.374225.145202.865287.95267.75473.762.919106.973197.872209.637205.943191.024181.768196.216238.385223.35239.14109.04162.2859.37835.624NANANA
us-gaap:PropertyPlantAndEquipmentNet ▆▆█████▇▇▇▇▇▇▇█▅▅▅▆▇▇▇▇▆▅▄▄▄▄▄▃▃▃▃▂▂▂▁▁4825.8254888.3385953.6486029.1435985.3295954.395831.1655776.1875718.455669.5495554.7925417.0835346.4115450.126081.3544364.6944601.3324603.7794950.285451.0395485.0455643.0935503.9035215.4414434.2014004.6963859.7924181.3383989.0893781.113677.1973601.7983426.9493278.0043096.6363042.5352811.492590.6562434.052NANANA
us-gaap:OperatingLeaseRightOfUseAsset ▁▄█27.77833.36539.717NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:OtherAssetsNoncurrent ▅▅▆▇██▃▃▃▃▃▃▁▁▂▁▂▃▃▇▆█▇▅▅▆▆██▇▇▇█▇█▆▅▄▁51.94456.61865.32674.25587.69683.69233.93535.53931.67432.11932.50732.89614.68315.84719.9418.10125.5536.90731.67377.61571.40183.10978.21451.1956.1269.33470.20886.27882.83475.65378.52980.06284.62978.41283.37569.1551.65647.05316.783NANANA
  2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
us-gaap:LiabilitiesCurrent ▁▂▃▃▃▃▃▅█▄▃▂▁▁▂▁▁▁▁▃▃▅▆▄▅▃▄▄▄▃▃▃▃▃▃▂▃▃▃307.9383.463472.043491.042503.945545.342466.052733.8571047.957649.176559.212436.676347.772353.485415.172328.63320.841303.157302.525485.197522.157696.255784.66669.574684.581515.279639.131629.779588.2510.154541.546499.925475.761471.525505.805423.526483.148489.949502.053NANANA
us-gaap:AccountsPayableAndAccruedLiabilitiesCurrent ▁▃▃▄▄▄▄▄▄▅▃▃▂▂▂▁▁▂▂▃▄▆██▇▄▇▇▆▅▆▅▄▄▄▃▄▃▄257.053359.406402.008431.44407.883426.55403.199429.698446.318468.108386.63348.885311.476299.676299.708277.571257.349293.796302.517361.734423.536561.051640.684664.925592.493443.395606.751601.131577.452480.318525.627474.573460.611413.211456.999400.42413.048375.721417.654NANANA
us-gaap:OperatingLeaseLiabilityCurrent ▁▄█12.59715.7819.189NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:OtherLiabilitiesCurrent ▄▅▆▇█▇▁12.59715.7819.18921.80425.80323.5230.0NANANANANANANANANANA1.150.00.00.00.01.00.00.011.26.06.06.07.06.92NANANA6.0NANANANANANANA
  2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
us-gaap:LiabilitiesNoncurrent ▅▆▆▇▆▆▆▆▆▇▇▇▇▇██▇▇▇███▇▆▅▅▅▅▅▄▄▄▄▃▃▂▂▂▁2678.8962889.8453071.1953118.2913086.1512998.0512966.4882940.4652951.9013298.7153222.9563330.2093363.0053430.7083481.2063608.8883374.7983395.4833466.7173541.8273503.1543668.2033445.3853039.3322573.5022498.3132459.2132520.2822475.5652345.3452243.5172149.9851996.1141883.1491830.2351445.0011387.5791351.1271023.742NANANA
us-gaap:LongTermDebt 2263.119NA2610.298NANANANANANANANANANANANANANANANANANANANANANANA1600.0NANANA1100.0NANANANANANANANANANANA
us-gaap:DeferredIncomeTaxLiabilitiesNet ▁▃█57.04993.918189.386NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:OtherLiabilitiesNoncurrent ▆▇▇▇██▅▅▅▅▅▅▅▅▅▅▅▅▅▄▄▄▄▃▃▂▃▅▆▇█▇▇▇█▁▁▁▁55.07258.07461.43363.23367.1468.05842.52245.8145.90645.78648.447.49745.09847.25247.24442.53844.84143.8545.33240.34136.93839.67639.63128.32926.46725.8128.77147.01652.91457.87666.35757.6857.08361.50567.85317.38316.86615.07817.356NANANA
us-gaap:OperatingLeaseLiabilityNoncurrent ▁▄█17.43320.0123.137NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
  2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
us-gaap:StockholdersEquity ▁▂▆▇▇▆█▄▆▆▂2280.8322341.7172748.9942843.752801.8432743.2252920.3222599.3992736.6272712.0972394.608NANANA2497.133NANANA1852.401NANANA2286.655NANANANANANANANANANANANANANANANANANANA
us-gaap:CommonStockValue ███████████████▄▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁1.1361.131.131.1291.1251.1221.1221.1211.1181.1171.1171.1161.1151.1131.1130.8690.6830.6810.6810.680.6760.6750.6750.6740.6710.6710.6710.670.6640.6630.662NA0.6520.6420.6410.6410.6380.6370.634NANANA
us-gaap:AdditionalPaidInCapitalCommonStock ███████████████▄▂▂▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁1825.3271797.1541791.5961784.7871779.6651771.5581765.7381758.2051754.1691747.0351741.6231734.2171729.1041723.011716.556866.239321.841312.473305.607298.438299.637289.294283.295273.783273.664264.064257.72247.165254.94242.526233.642222.812234.562222.353216.966223.12215.704206.304191.674NANANA
us-gaap:RetainedEarningsAccumulatedDeficit ▁▁▃▄▄▃▄▃▃▃▂▂▂▃▂▃▄▄▆▇▇██▇▆▅▅▅▅▄▄▅▅▅▅▅▄▄▄465.31554.562967.5871069.6421033.051982.6621165.842856.111997.641980.444665.657691.915786.608906.515794.02994.9691040.2191208.91559.5151899.8031900.0581957.7472013.9971682.2731476.7031416.9231354.6691347.6741280.3321203.8131190.3971257.5341299.1751274.2871251.1571371.8691144.9721020.4481042.123NANANA
us-gaap:AccumulatedOtherComprehensiveIncomeLossNetOfTax ▄▄▄▄▄▄▃▁▁▁▃▂▂▂▂▂▂▃▃▄▄▄▄██▇▇▆▆▅▅▇▇▇█▇▄▂▂-10.941-11.129-11.319-11.808-11.998-12.117-12.38-16.038-16.301-16.499-13.789-15.207-14.999-15.123-14.556-14.162-13.907-13.638-13.402-12.084-12.064-11.488-11.312-4.89-5.086-5.416-5.416-7.902-8.21-8.956-9.014-5.744-5.43-5.314-4.28-6.333-10.604-14.555-15.482NANANA
  2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
us-gaap:NetCashProvidedByUsedInOperatingActivities ▁▆▇▅█▁▄▇▄▂114.339218.132241.981203.156259.928118.502179.452229.659171.383140.135NANANANANANANANA205.958235.341265.586283.922381.453359.969415.425299.728337.645404.514314.063282.292268.383243.298222.235188.053270.785119.774213.288156.68578.737148.21116.258153.892
us-gaap:NetCashProvidedByUsedInInvestingActivities ▃▃▂▂▁▂▂▁▃█-170.811-139.306-234.588-215.415-320.353-242.935-273.974-308.241-194.978189.259NANANANANANANANA-209.793-288.12-112.268-534.458-742.764-903.35-487.102-345.533-26.53-388.583-398.887-378.903-373.637-388.539-363.371-331.786-508.006-190.129-293.752-273.023-125.213-153.644-146.85864.142
us-gaap:NetCashProvidedByUsedInFinancingActivities █▆▇▇██▇▁▇▇56.467-78.821-10.8949.3666.82146.482-4.319-360.518-3.8360.0NANANANANANANANA3.65652.894-153.258250.438361.162379.856-0.964-0.008-29.043-15.93184.91390.772110.996145.241141.03424.825326.492-0.802-9.75302.55544.4642.2740.425-188.259
us-gaap:CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect ▄▄▄▄▄▃▃▁▄▆▃▃▃█-0.0050.005-3.501-2.8996.396-77.951-98.841-439.1-27.431329.394-127.472-118.106-100.14647.289NANANANANANANANANANANANANANANANANANANANANANANANANANANANA
  2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
us-gaap:NetCashProvidedByUsedInOperatingActivities ▁▆▇▅█▁▄▇▄▂114.339218.132241.981203.156259.928118.502179.452229.659171.383140.135NANANANANANANANA205.958235.341265.586283.922381.453359.969415.425299.728337.645404.514314.063282.292268.383243.298222.235188.053270.785119.774213.288156.68578.737148.21116.258153.892
us-gaap:NetIncomeLoss ▄▁▄▅▅▃█▄▅█▅▄▄▆-89.252-411.895-102.05542.23450.388-177.568309.732-135.92317.197317.401-26.258-89.112-119.90774.434NANANANANANANANANANANANANANANANANANANANANANANANANANANANA
 us-gaap:NetIncomeLoss us-gaap:StatementEquityComponents us-gaap:RetainedEarnings█▁-89.252-411.895NA42.23450.388-177.568NA-135.92317.197317.401NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:DeferredIncomeTaxExpenseBenefit ▄▃▄▅▅▄▆▄▄▆▂▄▃▅▂▄▃▁▁▅▄▄█▇▅▅▅▅▅▅▄▄▅▅▄▆▆▄▅▅▅▆-36.921-99.347-28.21519.61713.766-47.00381.036-36.833-0.86198.366-124.608-36.668-64.01533.225-133.873-23.756-95.975-195.039-196.3344.168-50.829-33.727199.6124.26935.53738.3746.93642.3845.95910.28-36.943-22.9114.92715.288-40.462112.0170.415-18.17428.8226.87514.21264.608
us-gaap:ShareBasedCompensation ▅▄▄▇▆▅▆█▃▄▇▆▁▄5.7125.5615.566.7666.1545.8386.2287.0045.2645.4126.546.3474.3585.455NANANANANANANANANANANANANANANA8.1138.4549.3598.0224.35NA7.713NANANANANANA
  2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
us-gaap:NetCashProvidedByUsedInInvestingActivities ▃▃▂▂▁▂▂▁▃█-170.811-139.306-234.588-215.415-320.353-242.935-273.974-308.241-194.978189.259NANANANANANANANA-209.793-288.12-112.268-534.458-742.764-903.35-487.102-345.533-26.53-388.583-398.887-378.903-373.637-388.539-363.371-331.786-508.006-190.129-293.752-273.023-125.213-153.644-146.85864.142
  2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
us-gaap:NetCashProvidedByUsedInFinancingActivities █▆▇▇██▇▁▇▇56.467-78.821-10.8949.3666.82146.482-4.319-360.518-3.8360.0NANANANANANANANA3.65652.894-153.258250.438361.162379.856-0.964-0.008-29.043-15.93184.91390.772110.996145.241141.03424.825326.492-0.802-9.75302.55544.4642.2740.425-188.259
  2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
 us-gaap:DebtInstrumentInterestRateStatedPercentage us-gaap:DebtInstrument sm:A100SeniorSecuredNotesDue20251.0000000000000001e-07NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
 us-gaap:DebtInstrumentInterestRateStatedPercentage us-gaap:DebtInstrument sm:A150SeniorSecuredConvertibleNotesDue20211.5e-08NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
 us-gaap:DebtInstrumentInterestRateStatedPercentage us-gaap:DebtInstrument sm:A50SeniorUnsecuredNotesDue20245.0000000000000004e-08NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
 us-gaap:DebtInstrumentInterestRateStatedPercentage us-gaap:DebtInstrument sm:A5625SeniorUnsecuredNotesDue20255.6250000000000004e-08NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
 us-gaap:DebtInstrumentInterestRateStatedPercentage us-gaap:DebtInstrument sm:A6125SeniorUnsecuredNotesDue20226.125e-08NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
 us-gaap:DebtInstrumentInterestRateStatedPercentage us-gaap:DebtInstrument sm:A6625SeniorUnsecuredNotesDue20276.625e-08NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
 us-gaap:DebtInstrumentInterestRateStatedPercentage us-gaap:DebtInstrument sm:A675SeniorUnsecuredNotesDue20266.75e-08NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA

None

us-gaap:CommonStockValue

us-gaap:CommonStockValue


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312009-12-31
Value1136000.01130000.01130000.01129000.01125000.01122000.01122000.01121000.01118000.01117000.01117000.01116000.01115000.01113000.01113000.0869000.0683000.0681000.0681000.0680000.0676000.0675000.0675000.0674000.0671000.0671000.0671000.0670000.0664000.0663000.0662000.0652000.0642000.0641000.0641000.0638000.0637000.0634000.0629000.0
Percentage of CommonStockValue100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

None

us-gaap:CommonStockSharesIssued

us-gaap:CommonStockSharesIssued


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312009-12-31
Value11311211211211211211211211111111111111111111186686868676767676767676766666666666564646463636362
Percentage of CommonStockSharesIssued100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

None

us-gaap:CommonStockSharesOutstanding

us-gaap:CommonStockSharesOutstanding


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312009-12-31
Value11311211211211211211211211111111111111111111186686868676767676767676766666666666564636363636362
Percentage of CommonStockSharesOutstanding100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:CommonStockSharesOutstanding us-gaap:StatementEquityComponents

us-gaap:CommonStock


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302015-12-312014-12-31
Value113112112112112112112112111111111111111111111866867
Percentage of CommonStockSharesOutstanding100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

None

us-gaap:WeightedAverageNumberOfDilutedSharesOutstanding

us-gaap:WeightedAverageNumberOfDilutedSharesOutstanding


None
Period End2020-06-302020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-312017-09-302017-06-302017-03-312016-09-302016-06-302016-03-312015-09-302015-06-302015-03-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-312012-09-302012-06-302012-03-312011-09-302011-06-302011-03-312010-09-302010-06-302010-03-31
Value113113113112112112113112111111111786868686767686868686767656767676663646464
Percentage of WeightedAverageNumberOfDilutedSharesOutstanding100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

None

us-gaap:WeightedAverageNumberOfSharesOutstandingBasic

us-gaap:WeightedAverageNumberOfSharesOutstandingBasic


None
Period End2020-06-302020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-312017-09-302017-06-302017-03-312016-09-302016-06-302016-03-312015-09-302015-06-302015-03-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-312012-09-302012-06-302012-03-312011-09-302011-06-302011-03-312010-09-302010-06-302010-03-31
Value113113112112112112111111111111111786868676767676767666666656464636363636262
Percentage of WeightedAverageNumberOfSharesOutstandingBasic100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

None

us-gaap:AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount

us-gaap:AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount


None
Period End2020-06-302020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-312017-09-302017-06-302017-03-312016-09-302016-06-302016-03-312015-09-302015-06-302015-03-31
Value701000.01219000.000781000.02433000.000044000.00506000.0155000.049000.00590000.0452000.0
Percentage of AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount100.0100.00.00.0100.0100.00.00.00.0100.00.0100.0100.0100.00.0100.0100.0

None

us-gaap:EarningsPerShareBasic

us-gaap:EarningsPerShareBasic


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value-0.79-3.64-0.90.370.45-1.582.76-1.210.152.84-0.23-0.8-1.080.67-2.12-0.52-2.48-5.1-5.020.05-0.85-0.794.933.10.890.980.11.061.150.25-1.03-0.580.390.41-1.93.61.96-0.290.590.250.292.01
Percentage of EarningsPerShareBasic100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

None

us-gaap:EarningsPerShareDiluted

us-gaap:EarningsPerShareDiluted


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value-0.79-3.64-0.90.370.45-1.582.73-1.210.152.81-0.23-0.8-1.080.67-2.12-0.52-2.48-5.1-5.020.05-0.85-0.794.893.050.880.960.11.041.130.25-1.02-0.580.370.39-1.83.411.86-0.290.570.240.281.96
Percentage of EarningsPerShareDiluted100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

None

us-gaap:RevenueFromContractWithCustomerIncludingAssessedTax

us-gaap:RevenueFromContractWithCustomerIncludingAssessedTax


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-30
Value169354449389406340392458402382341294
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Revenues100.199.60.099.899.999.90.099.890.749.80.099.7

us-gaap:RevenueFromContractWithCustomerIncludingAssessedTax us-gaap:ProductOrService

sm:NaturalGasRevenue


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-30
Value344068646565949684798086
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax20.511.515.216.416.019.124.121.120.920.723.529.3
Percentage of Revenues20.611.40.016.416.019.10.021.118.910.30.029.2
Percentage of Revenues sm:NaturalGasRevenue0.00.00.00.00.00.00.00.00.00.00.00.0

sm:OilRevenue


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-30
Value119291347292304239250287266261203154
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax70.482.377.375.274.870.263.962.766.168.259.752.4
Percentage of Revenues70.582.00.075.074.770.10.062.660.033.90.052.2
Percentage of Revenues sm:OilRevenue0.00.00.00.00.00.00.00.00.00.00.00.0

sm:OilandCondensateRevenue


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-30
Value152133323736477452425753
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax9.16.27.58.39.210.712.016.213.011.216.818.3
Percentage of Revenues9.16.10.08.39.210.60.016.111.85.60.018.3
Percentage of Revenues sm:OilandCondensateRevenue0.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:RevenueFromContractWithCustomerIncludingAssessedTax us-gaap:ProductOrService, us-gaap:StatementGeographical

sm:NaturalGasRevenue, sm:MidlandBasin


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-30
Value1111261716152840
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax7.03.25.84.64.04.67.38.8
Percentage of Revenues7.03.20.04.64.04.60.08.8
Percentage of Revenues sm:NaturalGasRevenue sm:MidlandBasin0.00.00.00.00.00.00.00.0

sm:NaturalGasRevenue, sm:SouthTexas


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-30
Value2229424648496556
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax13.58.39.411.912.014.516.812.3
Percentage of Revenues13.58.30.011.912.014.50.012.3
Percentage of Revenues sm:NaturalGasRevenue sm:SouthTexas0.00.00.00.00.00.00.00.0

sm:OilRevenue, sm:MidlandBasin


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-30
Value114276328277288225234270
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax67.478.073.271.270.966.259.758.9
Percentage of Revenues67.477.60.071.170.866.10.058.8
Percentage of Revenues sm:OilRevenue sm:MidlandBasin0.00.00.00.00.00.00.00.0

sm:OilRevenue, sm:SouthTexas


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-30
Value5.15815181515131617
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax3.04.44.14.03.94.14.23.8
Percentage of Revenues3.04.40.04.03.94.10.03.8
Percentage of Revenues sm:OilRevenue sm:SouthTexas0.00.00.00.00.00.00.00.0

sm:OilandCondensateRevenue, sm:MidlandBasin


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-30
Value0.0450.0580.0210.124-0.0430.0210.1840.563
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax0.00.00.00.0-0.00.00.00.1
Percentage of Revenues0.00.00.00.0-0.00.00.00.1
Percentage of Revenues sm:OilandCondensateRevenue sm:MidlandBasin0.00.00.00.00.00.00.00.0

sm:OilandCondensateRevenue, sm:SouthTexas


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-30
Value1521333237364673
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax9.16.17.58.39.210.712.016.0
Percentage of Revenues9.16.10.08.39.210.60.016.0
Percentage of Revenues sm:OilandCondensateRevenue sm:SouthTexas0.00.00.00.00.00.00.00.0

us-gaap:RevenueFromContractWithCustomerIncludingAssessedTax us-gaap:StatementGeographical

sm:MidlandBasin


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-30
Value126287354295304240263311
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax74.481.279.075.874.970.767.167.9
Percentage of Revenues74.580.80.075.674.970.60.067.7
Percentage of Revenues sm:MidlandBasin0.00.00.00.00.00.00.00.0

sm:SouthTexas


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-30
Value4366949410299129147
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax25.618.821.024.225.129.332.932.1
Percentage of Revenues25.618.80.024.125.129.20.032.1
Percentage of Revenues sm:SouthTexas0.00.00.00.00.00.00.00.0

None

us-gaap:Revenues

us-gaap:Revenues


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value169355451390407340394459443769340295120372379352341143303371516365595618674632636613559484444378304377379530377315294226211360
Percentage of Revenues100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Revenues100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

None

us-gaap:CostOfGoodsAndServicesSold

us-gaap:CostOfGoodsAndServicesSold


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-30
Value80119127129123121121127117120122122
Percentage of CostOfGoodsAndServicesSold100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Revenues47.433.628.233.130.235.630.827.826.415.736.141.5

None

us-gaap:CostsAndExpenses

us-gaap:CostsAndExpenses


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value482836539290303526-35.57356838731044138026820766437057266980933956742037261553504596475415437530421252321559157166335230195174152
Percentage of CostsAndExpenses100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Revenues284.3235.2119.574.574.4154.4-9.0123.787.440.3129.6129.0222.355.6174.9105.0167.4468.1266.591.4109.9114.96.342.382.079.793.777.674.290.5119.3111.382.885.1147.529.744.0106.378.586.382.642.3

None

us-gaap:GeneralAndAdministrativeExpense

us-gaap:GeneralAndAdministrativeExpense


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value272737323032302928273527282933322832333742435241383547333532283231283529272531262523
Percentage of GeneralAndAdministrativeExpense100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Revenues16.17.78.28.37.69.47.76.46.53.610.39.423.67.88.89.38.322.511.110.28.311.98.86.75.65.57.55.56.36.76.48.510.27.59.45.67.28.210.711.612.06.5

None

us-gaap:OperatingIncomeLoss

us-gaap:OperatingIncomeLoss


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value-312.679-481.092-88.30399104-185.309429-108.64456459-100.852-85.592-147.638165-284.387-17.654-230.549-526.725-505.57332-50.879-54.4355583561211284013714446-85.797-42.8365256-180.139372211-19.972633136207
Percentage of OperatingIncomeLoss100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Revenues-184.3-135.2-19.525.525.6-54.4109.0-23.712.659.7-29.6-29.0-122.344.4-74.9-5.0-67.4-368.1-166.58.6-9.9-14.993.757.718.020.36.322.425.89.5-19.3-11.317.214.9-47.570.356.0-6.321.513.717.457.7

None

us-gaap:InterestExpense

us-gaap:InterestExpense


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value40414040393738384143434444464647343131333032272224242424211918181214129.372149.7144.7276.3396.3436.787
Percentage of InterestExpense100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Revenues23.811.79.110.49.711.19.78.39.45.612.814.936.912.612.213.410.021.710.48.96.08.94.63.73.63.83.94.03.93.94.14.84.23.83.21.83.93.11.62.83.01.9

None

us-gaap:InterestExpenseDebt us-gaap:DebtInstrument

us-gaap:InterestExpenseDebt

sm:A1.50SeniorConvertibleNotesDue2021


None
Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value2.92.82.82.72.72.72.62.62.62.52.52.52.4
Percentage of InterestExpenseDebt100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Revenues0.80.60.70.70.80.70.60.60.30.70.82.10.6
Percentage of Revenues sm:A1.50SeniorConvertibleNotesDue20210.00.00.00.00.00.00.00.00.00.00.00.00.0

sm:A150SeniorSecuredConvertibleNotesDue2021


None
Period End2020-06-302019-06-30
Value2.62.7
Percentage of InterestExpenseDebt0.0100.0
Percentage of Revenues1.50.7
Percentage of Revenues sm:A150SeniorSecuredConvertibleNotesDue20210.00.0

None

us-gaap:InterestPaidNet

us-gaap:InterestPaidNet


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-31
Value3447284527392646374039404042412439243824303410319.55237
Percentage of InterestPaidNet100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Revenues20.513.36.411.76.811.76.710.28.55.211.613.933.611.511.07.011.417.112.56.56.09.31.75.11.46.0

None

us-gaap:OtherNonoperatingIncomeExpense

us-gaap:OtherNonoperatingIncomeExpense


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-30
Value-185000.0-494000.0-547000.0-548000.0-562000.0-317000.069000.0806000.01802000.0409000.01067000.01301000.01265000.0335000.0130000.0221000.05000.06000.026000.027000.025000.0571000.0-68000.0-672000.0-1847000.026000.03000.028000.024000.0
Percentage of OtherNonoperatingIncomeExpense100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Revenues-0.1-0.1-0.1-0.1-0.1-0.10.00.20.40.10.30.41.00.10.00.10.00.00.00.00.00.2-0.0-0.1-0.30.00.00.00.0

None

us-gaap:GainsLossesOnExtinguishmentOfDebt

us-gaap:GainsLossesOnExtinguishmentOfDebt


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-30
Value227120.00.00.00.0-0.018-26.7220.00.00.00.00.0-0.0350.00.00.0150.00.0-16.5780.00.00.00.0
Percentage of GainsLossesOnExtinguishmentOfDebt100.0100.00.00.00.00.0100.0100.00.00.00.00.00.0100.00.00.00.0100.00.00.0100.00.00.00.00.0
Percentage of Revenues134.03.40.00.00.00.0-0.0-5.80.00.00.00.00.0-0.00.00.00.011.00.00.0-3.20.00.00.00.0

us-gaap:GainsLossesOnExtinguishmentOfDebt us-gaap:DebtInstrument

sm:A6.125SeniorNotesDue2022


None
Period End2020-03-31
Value12
Percentage of GainsLossesOnExtinguishmentOfDebt100.0
Percentage of Revenues3.4
Percentage of Revenues sm:A6.125SeniorNotesDue20220.0

sm:A6125SeniorUnsecuredNotesDue2022


None
Period End2020-03-31
Value12
Percentage of GainsLossesOnExtinguishmentOfDebt100.0
Percentage of Revenues3.4
Percentage of Revenues sm:A6125SeniorUnsecuredNotesDue20220.0

None

us-gaap:AllocatedShareBasedCompensationExpense us-gaap:AwardType

us-gaap:AllocatedShareBasedCompensationExpense

us-gaap:PerformanceShares


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-09-302012-06-302012-03-31
Value2.82.62.32.92.92.82.63.02.42.42.92.61.72.52.82.33.02.93.22.42.72.34.44.83.63.23.63.55.04.75.15.22.9
Percentage of AllocatedShareBasedCompensationExpense100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Revenues1.70.70.50.70.70.80.70.70.50.30.90.91.40.70.70.70.92.01.10.60.50.60.70.80.50.50.60.60.91.01.31.70.8
Percentage of Revenues us-gaap:PerformanceShares0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:RestrictedStockUnitsRSU


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-31
Value2.72.62.72.92.82.72.83.02.32.72.82.92.12.52.62.83.33.23.54.12.92.93.44.82.92.83.13.73.33.03.33.91.41.2
Percentage of AllocatedShareBasedCompensationExpense96.4100.0117.4100.096.696.4107.7100.095.8112.596.6111.5123.5100.092.9121.7110.0110.3109.4170.8107.4126.177.3100.080.687.586.1105.766.063.80.076.526.941.4
Percentage of Revenues1.60.70.60.70.70.80.70.70.50.40.81.01.70.70.70.81.02.21.21.10.60.80.60.80.40.40.50.60.60.60.71.00.50.3
Percentage of Revenues us-gaap:RestrictedStockUnitsRSU0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

None

us-gaap:IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest

us-gaap:IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-31
Value-125.937-510.903-129.7615863-223.606391-172.67116416-143.403-128.382-190.968118-330.613-64.639-264.579-542.085-537.113-1.026-98.211-86.511530333951041511312227-104.146-61.0723942
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 Revenues-74.2-143.6-28.714.915.7-65.699.4-37.63.754.1-42.1-43.5-158.231.9-87.0-18.3-77.4-378.9-176.8-0.3-19.0-23.689.153.914.216.52.518.421.95.6-23.4-16.113.011.1

None

us-gaap:IncomeTaxExpenseBenefit

us-gaap:IncomeTaxExpenseBenefit


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value-36.685-99.008-27.7061613-46.03882-36.748-0.90198-117.145-39.27-71.06144-129.667-23.732-95.898-194.875-196.855-4.14-40.703-33.45319812436388.755424610-37.008-22.7361415-71.55713372-11.055219.3461274
Percentage of IncomeTaxExpenseBenefit100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Revenues-21.6-27.8-6.14.13.3-13.520.8-8.0-0.212.9-34.4-13.3-58.911.9-34.1-6.7-28.1-136.2-64.8-1.1-7.9-9.133.420.25.36.11.46.98.32.1-8.3-6.04.94.2-18.925.119.3-3.57.34.15.920.8

None

us-gaap:OtherComprehensiveIncomeLossNetOfTax

us-gaap:OtherComprehensiveIncomeLossNetOfTax


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-09-302015-06-302015-03-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-312012-09-302012-06-302012-03-31
Value188000.0190000.0489000.0190000.0119000.0263000.03657000.0263000.0198000.0260000.01418000.0-208000.0124000.0-567000.0-394000.0-255000.0-269000.0-236000.0-20000.0-576000.0-176000.0196000.0330000.00308000.0746000.058000.0-314000.0-116000.0-1034000.0
Percentage of OtherComprehensiveIncomeLossNetOfTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0100.0100.0100.0100.0100.0100.0
Percentage of Revenues0.10.10.10.00.00.10.90.10.00.00.4-0.10.1-0.2-0.1-0.1-0.1-0.2-0.0-0.1-0.00.00.00.00.10.10.0-0.1-0.0-0.3

us-gaap:OtherComprehensiveIncomeLossNetOfTax us-gaap:StatementEquityComponents

us-gaap:AccumulatedOtherComprehensiveIncome


None
Period End2020-06-302020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-31
Value188000.0190000.0190000.0119000.0263000.0263000.0198000.0260000.01418000.0-208000.0124000.0-567000.0-394000.0
Percentage of OtherComprehensiveIncomeLossNetOfTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Revenues0.10.10.00.00.10.10.00.00.4-0.10.1-0.2-0.1
Percentage of Revenues us-gaap:AccumulatedOtherComprehensiveIncome0.00.00.00.00.00.00.00.00.00.00.00.00.0

None

us-gaap:NetIncomeLoss

us-gaap:NetIncomeLoss


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value-89.252-411.895-102.0554250-177.568309-135.92317317-26.258-89.112-119.90774
Percentage of NetIncomeLoss100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Revenues-52.6-115.8-22.610.812.4-52.178.6-29.63.941.2-7.7-30.2-99.320.0

us-gaap:NetIncomeLoss us-gaap:StatementEquityComponents

us-gaap:RetainedEarnings


None
Period End2020-06-302020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-31
Value-89.252-411.8954250-177.568-135.92317317
Percentage of NetIncomeLoss100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Revenues-52.6-115.810.812.4-52.1-29.63.941.2
Percentage of Revenues us-gaap:RetainedEarnings0.00.00.00.00.00.00.00.0

None

us-gaap:ComprehensiveIncomeNetOfTax

us-gaap:ComprehensiveIncomeNetOfTax


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-30
Value-89.064-411.705-101.5664250-177.305313-135.6617317-24.84-89.32-119.78373-201.34-41.162-168.95-347.446-341.5763.094-58.084-53.23432520960659.482707716-70.408-38.652425-118.658234128
Percentage of ComprehensiveIncomeNetOfTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Revenues-52.5-115.7-22.510.912.4-52.079.5-29.53.941.3-7.3-30.2-99.219.8-53.0-11.7-49.4-242.8-112.50.8-11.3-14.554.633.88.910.41.511.613.83.5-15.8-10.28.16.7-31.344.234.0

None

us-gaap:Assets

us-gaap:Assets


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312009-12-31
Value5267561562926453639162866352627367366659617661786212639963935785504452075621621362136600651656605004468947054736459042924199412339993845379834563219305327442360
Percentage of Assets100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

None

us-gaap:LiabilitiesAndStockholdersEquity

us-gaap:LiabilitiesAndStockholdersEquity


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312009-12-31
Value5267561562926453639162866352627367366659617661786212639963935785504452075621621362136600651656605004468947054736459042924199412339993845379834563219305327442360
Percentage of LiabilitiesAndStockholdersEquity100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

None

us-gaap:StockholdersEquity

us-gaap:StockholdersEquity


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312016-12-312015-12-312014-12-31
Value22802341274828432801274329202599273627122394249718522286
Percentage of StockholdersEquity100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets43.341.743.744.143.843.646.041.440.640.738.839.133.035.1

us-gaap:StockholdersEquity us-gaap:StatementEquityComponents

us-gaap:AccumulatedOtherComprehensiveIncome


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312016-12-312015-12-312014-12-31
Value-10.941-11.129-11.319-11.808-11.998-12.117-12.38-16.038-16.301-16.499-13.789-14.556-13.402-11.312
Percentage of StockholdersEquity-0.5-0.5-0.4-0.4-0.4-0.4-0.4-0.6-0.6-0.6-0.6-0.6-0.7-0.5
Percentage of Assets-0.2-0.2-0.2-0.2-0.2-0.2-0.2-0.3-0.2-0.2-0.2-0.2-0.2-0.2
Percentage of Assets us-gaap:AccumulatedOtherComprehensiveIncome0.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:AdditionalPaidInCapital


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312016-12-312015-12-312014-12-31
Value182517971791178417791771176517581754174717411716305283
Percentage of StockholdersEquity80.076.765.262.863.564.660.567.664.164.472.768.716.512.4
Percentage of Assets34.732.028.527.727.828.227.828.026.026.228.226.85.44.3
Percentage of Assets us-gaap:AdditionalPaidInCapital0.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:CommonStock


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312016-12-312015-12-312014-12-31
Value1.1361.131.131.1291.1251.1221.1221.1211.1181.1171.1171.1130.6810.675
Percentage of StockholdersEquity0.00.00.00.00.00.00.00.00.00.00.00.00.00.0
Percentage of Assets0.00.00.00.00.00.00.00.00.00.00.00.00.00.0
Percentage of Assets us-gaap:CommonStock0.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:RetainedEarnings


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312016-12-312015-12-312014-12-31
Value46555496710691033982116585699798066579415592013
Percentage of StockholdersEquity20.423.735.237.636.935.839.932.936.536.227.831.884.288.1
Percentage of Assets8.89.915.416.616.215.618.413.614.814.710.812.427.730.9
Percentage of Assets us-gaap:RetainedEarnings0.00.00.00.00.00.00.00.00.00.00.00.00.00.0

None

us-gaap:AssetsCurrent

us-gaap:AssetsCurrent


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312009-12-31
Value3556252523112882214294539559235496687698492241246304405518537525669745371506577647345395320340325334343463304346403274209
Percentage of AssetsCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets6.711.14.04.84.53.56.87.214.213.98.910.812.413.33.521.56.07.89.28.78.510.111.46.610.112.313.87.38.67.58.17.98.48.912.28.810.713.210.08.9

None

us-gaap:CashAndCashEquivalentsAtCarryingValue

us-gaap:CashAndCashEquivalentsAtCarryingValue


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312008-12-312007-12-31
Value0.010.0150.010.010.0120.014771766156433134415596599.3729800.0180.0510.0180.1970.0820.0220.120.2691632362820.1760.1760.0875.9260.1840.1840.286119291011915.0777.0891040106.13143
Percentage of CashAndCashEquivalentsAtCarryingValue100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets0.00.00.00.00.00.01.22.89.19.75.17.19.010.30.117.00.00.00.00.00.00.00.00.03.35.06.00.00.00.00.10.00.00.03.10.93.16.30.20.00.00.00.50.00.0

None

us-gaap:AccountsReceivableNetCurrent

us-gaap:AccountsReceivableNetCurrent


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312009-12-31
Value127143184146165145167179178192160146105108151140143111134171239270322304312307318278291255254235209224210183173146163116
Percentage of AccountsReceivableNetCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets2.42.62.92.32.62.32.62.92.72.92.62.41.71.72.42.42.92.12.42.83.94.15.05.46.26.66.85.96.36.06.15.75.25.85.55.35.44.85.94.9

us-gaap:AccountsReceivableNetCurrent us-gaap:AccountsNotesLoansAndFinancingReceivableByReceivableType

us-gaap:AccruedIncomeReceivable


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-312010-12-31
Value606214610610010910712011597969658180228160149108
Percentage of AccountsReceivableNetCurrent47.943.379.272.760.475.364.067.164.450.460.363.243.455.971.763.071.066.4
Percentage of Assets1.21.12.31.61.61.71.71.91.71.51.61.51.02.84.83.83.93.9
Percentage of Assets us-gaap:AccruedIncomeReceivable0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

None

us-gaap:PrepaidExpenseAndOtherAssetsCurrent

us-gaap:PrepaidExpenseAndOtherAssetsCurrent


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302010-12-31
Value161712218.7238.4548.63215149.9971017188.0538.79915141217191618191615149.9441030283039464468303245
Percentage of PrepaidExpenseAndOtherAssetsCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets0.30.30.20.30.10.10.10.30.20.20.20.30.30.10.10.30.30.20.30.30.30.30.30.30.30.30.20.20.70.70.70.91.21.11.80.91.01.7

None

us-gaap:AssetsNoncurrent

us-gaap:AssetsNoncurrent


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312009-12-31
Value86101851121171109244626772929610087174138197152225202287267736210619720920519118119623822323910962593524
Percentage of AssetsNoncurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets1.61.81.41.71.81.81.50.70.91.01.21.51.61.61.43.02.73.82.73.63.34.44.11.31.32.34.24.44.54.54.34.86.05.86.33.21.91.91.31.0

None

us-gaap:PropertyPlantAndEquipmentNet

us-gaap:PropertyPlantAndEquipmentNet


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312009-12-31
Value4825488859536029598559545831577657185669555454175346545060814364460146034950545154855643550352154434400438594181398937813677360134263278309630422811259024342127
Percentage of PropertyPlantAndEquipmentNet100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets91.687.194.693.493.694.791.892.184.985.189.987.786.185.295.175.491.288.488.187.788.385.584.592.188.685.482.088.386.988.187.687.385.785.381.588.087.384.888.790.1

None

us-gaap:OperatingLeaseRightOfUseAsset

us-gaap:OperatingLeaseRightOfUseAsset


None
Period End2020-06-302020-03-312019-12-31
Value273339
Percentage of OperatingLeaseRightOfUseAsset100.0100.0100.0
Percentage of Assets0.50.60.6

None

us-gaap:OtherAssetsNoncurrent

us-gaap:OtherAssetsNoncurrent


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312009-12-31
Value51566574878333353132323214151918253631777183785156697086827578808478836951471616
Percentage of OtherAssetsNoncurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets1.01.01.01.21.41.30.50.60.50.50.50.50.20.20.30.30.50.70.61.21.11.31.20.91.11.51.51.81.81.81.91.92.12.02.22.01.61.50.60.7

None

us-gaap:LiabilitiesCurrent

us-gaap:LiabilitiesCurrent


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312009-12-31
Value3073834724915035454667331047649559436347353415328320303302485522696784669684515639629588510541499475471505423483489502296
Percentage of LiabilitiesCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets5.86.87.57.67.98.77.311.715.69.79.17.15.65.56.55.76.45.85.47.88.410.512.011.813.711.013.613.312.811.912.912.111.912.313.312.315.016.018.312.6

None

us-gaap:AccountsPayableAndAccruedLiabilitiesCurrent

us-gaap:AccountsPayableAndAccruedLiabilitiesCurrent


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312009-12-31
Value257359402431407426403429446468386348311299299277257293302361423561640664592443606601577480525474460413456400413375417236
Percentage of AccountsPayableAndAccruedLiabilitiesCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets4.96.46.46.76.46.86.36.86.67.06.35.65.04.74.74.85.15.65.45.86.88.59.811.711.89.512.912.712.611.212.511.511.510.712.011.612.812.315.210.0

None

us-gaap:OperatingLeaseLiabilityCurrent

us-gaap:OperatingLeaseLiabilityCurrent


None
Period End2020-06-302020-03-312019-12-31
Value121519
Percentage of OperatingLeaseLiabilityCurrent100.0100.0100.0
Percentage of Assets0.20.30.3

None

us-gaap:OtherLiabilitiesCurrent

us-gaap:OtherLiabilitiesCurrent


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312011-12-31
Value1215192125230.01.150.00.00.00.01.00.00.0116.06.06.07.06.926.0
Percentage of OtherLiabilitiesCurrent100.0100.0100.0100.0100.0100.00.0100.00.00.00.00.0100.00.00.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets0.20.30.30.30.40.40.00.00.00.00.00.00.00.00.00.20.10.10.10.20.20.2

None

us-gaap:LiabilitiesNoncurrent

us-gaap:LiabilitiesNoncurrent


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312009-12-31
Value2678288930713118308629982966294029513298322233303363343034813608337433953466354135033668344530392573249824592520247523452243214919961883183014451387135110231090
Percentage of LiabilitiesNoncurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets50.951.548.848.348.347.746.746.943.849.552.253.954.153.654.462.466.965.261.757.056.455.652.953.751.453.352.353.253.954.653.452.149.949.048.241.843.144.237.346.2

None

us-gaap:LongTermDebt

us-gaap:LongTermDebt


None
Period End2020-06-302019-12-312013-12-312012-12-31
Value2263261016001100
Percentage of LongTermDebt100.0100.0100.0100.0
Percentage of Assets43.041.534.026.2

None

us-gaap:DeferredIncomeTaxLiabilitiesNet

us-gaap:DeferredIncomeTaxLiabilitiesNet


None
Period End2020-06-302020-03-312019-12-31
Value5793189
Percentage of DeferredIncomeTaxLiabilitiesNet100.0100.0100.0
Percentage of Assets1.11.73.0

None

us-gaap:OtherLiabilitiesNoncurrent

us-gaap:OtherLiabilitiesNoncurrent


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312009-12-31
Value55586163676842454545484745474742444345403639392826252847525766575761671716151713
Percentage of OtherLiabilitiesNoncurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets1.01.01.01.01.11.10.70.70.70.70.80.80.70.70.70.70.90.80.80.60.60.60.60.50.50.60.61.01.21.31.61.41.41.61.80.50.50.50.60.6

None

us-gaap:OperatingLeaseLiabilityNoncurrent

us-gaap:OperatingLeaseLiabilityNoncurrent


None
Period End2020-06-302020-03-312019-12-31
Value172023
Percentage of OperatingLeaseLiabilityNoncurrent100.0100.0100.0
Percentage of Assets0.30.40.4

None

us-gaap:StockholdersEquity

us-gaap:StockholdersEquity


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312016-12-312015-12-312014-12-31
Value22802341274828432801274329202599273627122394249718522286
Percentage of StockholdersEquity100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets43.341.743.744.143.843.646.041.440.640.738.839.133.035.1

us-gaap:StockholdersEquity us-gaap:StatementEquityComponents

us-gaap:AccumulatedOtherComprehensiveIncome


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312016-12-312015-12-312014-12-31
Value-10.941-11.129-11.319-11.808-11.998-12.117-12.38-16.038-16.301-16.499-13.789-14.556-13.402-11.312
Percentage of StockholdersEquity-0.5-0.5-0.4-0.4-0.4-0.4-0.4-0.6-0.6-0.6-0.6-0.6-0.7-0.5
Percentage of Assets-0.2-0.2-0.2-0.2-0.2-0.2-0.2-0.3-0.2-0.2-0.2-0.2-0.2-0.2
Percentage of Assets us-gaap:AccumulatedOtherComprehensiveIncome0.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:AdditionalPaidInCapital


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312016-12-312015-12-312014-12-31
Value182517971791178417791771176517581754174717411716305283
Percentage of StockholdersEquity80.076.765.262.863.564.660.567.664.164.472.768.716.512.4
Percentage of Assets34.732.028.527.727.828.227.828.026.026.228.226.85.44.3
Percentage of Assets us-gaap:AdditionalPaidInCapital0.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:CommonStock


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312016-12-312015-12-312014-12-31
Value1.1361.131.131.1291.1251.1221.1221.1211.1181.1171.1171.1130.6810.675
Percentage of StockholdersEquity0.00.00.00.00.00.00.00.00.00.00.00.00.00.0
Percentage of Assets0.00.00.00.00.00.00.00.00.00.00.00.00.00.0
Percentage of Assets us-gaap:CommonStock0.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:RetainedEarnings


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312016-12-312015-12-312014-12-31
Value46555496710691033982116585699798066579415592013
Percentage of StockholdersEquity20.423.735.237.636.935.839.932.936.536.227.831.884.288.1
Percentage of Assets8.89.915.416.616.215.618.413.614.814.710.812.427.730.9
Percentage of Assets us-gaap:RetainedEarnings0.00.00.00.00.00.00.00.00.00.00.00.00.00.0

None

us-gaap:CommonStockValue

us-gaap:CommonStockValue


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312009-12-31
Value1136000.01130000.01130000.01129000.01125000.01122000.01122000.01121000.01118000.01117000.01117000.01116000.01115000.01113000.01113000.0869000.0683000.0681000.0681000.0680000.0676000.0675000.0675000.0674000.0671000.0671000.0671000.0670000.0664000.0663000.0662000.0652000.0642000.0641000.0641000.0638000.0637000.0634000.0629000.0
Percentage of CommonStockValue100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

None

us-gaap:AdditionalPaidInCapitalCommonStock

us-gaap:AdditionalPaidInCapitalCommonStock


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312009-12-31
Value182517971791178417791771176517581754174717411734172917231716866321312305298299289283273273264257247254242233222234222216223215206191160
Percentage of AdditionalPaidInCapitalCommonStock100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets34.732.028.527.727.828.227.828.026.026.228.228.127.826.926.815.06.46.05.44.84.84.44.34.85.55.65.55.25.65.75.65.45.95.85.76.56.76.87.06.8

None

us-gaap:RetainedEarningsAccumulatedDeficit

us-gaap:RetainedEarningsAccumulatedDeficit


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312009-12-31
Value46555496710691033982116585699798066569178690679499410401208155918991900195720131682147614161354134712801203119012571299127412511371114410201042851
Percentage of RetainedEarningsAccumulatedDeficit100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets8.89.915.416.616.215.618.413.614.814.710.811.212.714.212.417.220.623.227.730.630.629.730.929.729.530.228.828.527.928.028.330.532.533.132.939.735.633.438.036.1

None

us-gaap:AccumulatedOtherComprehensiveIncomeLossNetOfTax

us-gaap:AccumulatedOtherComprehensiveIncomeLossNetOfTax


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312009-12-31
Value-10941000.0-11129000.0-11319000.0-11808000.0-11998000.0-12117000.0-12380000.0-16038000.0-16301000.0-16499000.0-13789000.0-15207000.0-14999000.0-15123000.0-14556000.0-14162000.0-13907000.0-13638000.0-13402000.0-12084000.0-12064000.0-11488000.0-11312000.0-4890000.0-5086000.0-5416000.0-5416000.0-7902000.0-8210000.0-8956000.0-9014000.0-5744000.0-5430000.0-5314000.0-4280000.0-6333000.0-10604000.0-14555000.0-15482000.0-37954000.0
Percentage of AccumulatedOtherComprehensiveIncomeLossNetOfTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets-0.2-0.2-0.2-0.2-0.2-0.2-0.2-0.3-0.2-0.2-0.2-0.2-0.2-0.2-0.2-0.2-0.3-0.3-0.2-0.2-0.2-0.2-0.2-0.1-0.1-0.1-0.1-0.2-0.2-0.2-0.2-0.1-0.1-0.1-0.1-0.2-0.3-0.5-0.6-1.6

None

us-gaap:NetCashProvidedByUsedInOperatingActivities

us-gaap:NetCashProvidedByUsedInOperatingActivities


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value11421824120325911817922917114020523526528338135941529933740431428226824322218827011921315678148116153
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 Revenues67.461.353.652.063.834.845.550.038.618.267.863.451.577.664.058.261.547.453.066.056.158.360.464.273.049.871.322.656.449.726.865.354.942.7

None

us-gaap:NetCashProvidedByUsedInInvestingActivities

us-gaap:NetCashProvidedByUsedInInvestingActivities


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value-170.811-139.306-234.588-215.415-320.353-242.935-273.974-308.241-194.978189-209.793-288.12-112.268-534.458-742.764-903.35-487.102-345.533-26.53-388.583-398.887-378.903-373.637-388.539-363.371-331.786-508.006-190.129-293.752-273.023-125.213-153.644-146.85864
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 Revenues-100.7-39.2-51.9-55.2-78.7-71.3-69.5-67.1-43.924.6-69.1-77.6-21.8-146.1-124.7-146.0-72.2-54.6-4.2-63.4-71.3-78.3-84.1-102.5-119.4-87.9-133.8-35.8-77.7-86.6-42.6-67.7-69.417.8

None

us-gaap:NetCashProvidedByUsedInFinancingActivities

us-gaap:NetCashProvidedByUsedInFinancingActivities


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value56-78.821-10.8949.366646-4.319-360.518-3.8360.03.65652-153.258250361379-0.964-0.008-29.043-15.931849011014514124326-0.802-9.75302442.2740.425-188.259
Percentage of NetCashProvidedByUsedInFinancingActivities100.0100.0100.0100.0100.0100.0100.0100.0100.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Revenues33.3-22.2-2.42.416.413.6-1.1-78.5-0.90.01.214.3-29.768.460.661.4-0.1-0.0-4.6-2.615.218.725.038.346.36.686.0-0.2-2.695.915.11.00.2-52.3

None

us-gaap:CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect

us-gaap:CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value-0.0050.005-3.501-2.8996.396-77.951-98.841-439.1-27.431329-127.472-118.106-100.14647
Percentage of CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Revenues-0.00.0-0.8-0.71.6-22.9-25.1-95.6-6.242.8-37.4-40.0-83.0173.7

None

us-gaap:NetCashProvidedByUsedInOperatingActivities

us-gaap:NetCashProvidedByUsedInOperatingActivities


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value11421824120325911817922917114020523526528338135941529933740431428226824322218827011921315678148116153
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 Revenues67.461.353.652.063.834.845.550.038.618.267.863.451.577.664.058.261.547.453.066.056.158.360.464.273.049.871.322.656.449.726.865.354.942.7

None

us-gaap:NetIncomeLoss

us-gaap:NetIncomeLoss


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value-89.252-411.895-102.0554250-177.568309-135.92317317-26.258-89.112-119.90774
Percentage of NetIncomeLoss100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Revenues-52.6-115.8-22.610.812.4-52.178.6-29.63.941.2-7.7-30.2-99.320.0

us-gaap:NetIncomeLoss us-gaap:StatementEquityComponents

us-gaap:RetainedEarnings


None
Period End2020-06-302020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-31
Value-89.252-411.8954250-177.568-135.92317317
Percentage of NetIncomeLoss100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Revenues-52.6-115.810.812.4-52.1-29.63.941.2
Percentage of Revenues us-gaap:RetainedEarnings0.00.00.00.00.00.00.00.0

None

us-gaap:DeferredIncomeTaxExpenseBenefit

us-gaap:DeferredIncomeTaxExpenseBenefit


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value-36.921-99.347-28.2151913-47.00381-36.833-0.86198-124.608-36.668-64.01533-133.873-23.756-95.975-195.039-196.3344.168-50.829-33.72719912435386.936424510-36.943-22.911415-40.46211270-18.174286.8751464
Percentage of DeferredIncomeTaxExpenseBenefit100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

None

us-gaap:ShareBasedCompensation

us-gaap:ShareBasedCompensation


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312013-03-312012-12-312012-09-302012-06-302012-03-312011-09-30
Value5.7125.5615.566.7666.1545.8386.2287.0045.2645.4126.546.3474.3585.4558.1138.4549.3598.0224.357.713
Percentage of ShareBasedCompensation100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

None

us-gaap:NetCashProvidedByUsedInInvestingActivities

us-gaap:NetCashProvidedByUsedInInvestingActivities


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value-170.811-139.306-234.588-215.415-320.353-242.935-273.974-308.241-194.978189-209.793-288.12-112.268-534.458-742.764-903.35-487.102-345.533-26.53-388.583-398.887-378.903-373.637-388.539-363.371-331.786-508.006-190.129-293.752-273.023-125.213-153.644-146.85864
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 Revenues-100.7-39.2-51.9-55.2-78.7-71.3-69.5-67.1-43.924.6-69.1-77.6-21.8-146.1-124.7-146.0-72.2-54.6-4.2-63.4-71.3-78.3-84.1-102.5-119.4-87.9-133.8-35.8-77.7-86.6-42.6-67.7-69.417.8

None

us-gaap:NetCashProvidedByUsedInFinancingActivities

us-gaap:NetCashProvidedByUsedInFinancingActivities


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value56-78.821-10.8949.366646-4.319-360.518-3.8360.03.65652-153.258250361379-0.964-0.008-29.043-15.931849011014514124326-0.802-9.75302442.2740.425-188.259
Percentage of NetCashProvidedByUsedInFinancingActivities100.0100.0100.0100.0100.0100.0100.0100.0100.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Revenues33.3-22.2-2.42.416.413.6-1.1-78.5-0.90.01.214.3-29.768.460.661.4-0.1-0.0-4.6-2.615.218.725.038.346.36.686.0-0.2-2.695.915.11.00.2-52.3

None

us-gaap:DebtInstrumentInterestRateStatedPercentage us-gaap:DebtInstrument

us-gaap:DebtInstrumentInterestRateStatedPercentage

sm:A100SeniorSecuredNotesDue2025


None
Period End2020-06-30
Value0.1
Percentage of DebtInstrumentInterestRateStatedPercentage100.0
Percentage of LongTermDebtAndCapitalLeaseObligations0.0
Percentage of LongTermDebtAndCapitalLeaseObligations sm:A100SeniorSecuredNotesDue20250.0

sm:A150SeniorSecuredConvertibleNotesDue2021


None
Period End2020-06-30
Value0.015
Percentage of DebtInstrumentInterestRateStatedPercentage15.0
Percentage of LongTermDebtAndCapitalLeaseObligations0.0
Percentage of LongTermDebtAndCapitalLeaseObligations sm:A150SeniorSecuredConvertibleNotesDue20210.0

sm:A50SeniorUnsecuredNotesDue2024


None
Period End2020-06-30
Value0.05
Percentage of DebtInstrumentInterestRateStatedPercentage50.0
Percentage of LongTermDebtAndCapitalLeaseObligations0.0
Percentage of LongTermDebtAndCapitalLeaseObligations sm:A50SeniorUnsecuredNotesDue20240.0

sm:A5625SeniorUnsecuredNotesDue2025


None
Period End2020-06-30
Value0.05625
Percentage of DebtInstrumentInterestRateStatedPercentage56.2
Percentage of LongTermDebtAndCapitalLeaseObligations0.0
Percentage of LongTermDebtAndCapitalLeaseObligations sm:A5625SeniorUnsecuredNotesDue20250.0

sm:A6125SeniorUnsecuredNotesDue2022


None
Period End2020-06-30
Value0.06125
Percentage of DebtInstrumentInterestRateStatedPercentage61.2
Percentage of LongTermDebtAndCapitalLeaseObligations0.0
Percentage of LongTermDebtAndCapitalLeaseObligations sm:A6125SeniorUnsecuredNotesDue20220.0

sm:A6625SeniorUnsecuredNotesDue2027


None
Period End2020-06-30
Value0.06625
Percentage of DebtInstrumentInterestRateStatedPercentage66.2
Percentage of LongTermDebtAndCapitalLeaseObligations0.0
Percentage of LongTermDebtAndCapitalLeaseObligations sm:A6625SeniorUnsecuredNotesDue20270.0

sm:A675SeniorUnsecuredNotesDue2026


None
Period End2020-06-30
Value0.0675
Percentage of DebtInstrumentInterestRateStatedPercentage67.5
Percentage of LongTermDebtAndCapitalLeaseObligations0.0
Percentage of LongTermDebtAndCapitalLeaseObligations sm:A675SeniorUnsecuredNotesDue20260.0

None

us-gaap:EffectiveIncomeTaxRateContinuingOperations

us-gaap:EffectiveIncomeTaxRateContinuingOperations


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-30
Value0.2910.1940.030.2760.2120.206-0.0160.213-0.0550.2380.2040.3060.3720.3740.0090.3670.3620.359-0.0414.0350.4140.38700.3740.3760.3720.010.3750.3760.383-0.0250.3720.3730.373-0.0020.3670.3690.374-0.0020.3770.408
Percentage of EffectiveIncomeTaxRateContinuingOperations100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

sm:CashPortionOfGainLossOnDerivativeInstrument

sm:CashPortionOfGainLossOnDerivativeInstrument


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value1427315244.09-4.969-33.892-40.718-36.665-24.528-8.16813160.007
Percentage of CashPortionOfGainLossOnDerivativeInstrument100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

sm:ChangeInCapitalExpendituresIncurredButNotYetPaid

sm:ChangeInCapitalExpendituresIncurredButNotYetPaid


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-30
Value-45.69816-59.16744-72.28262-22.585-42.3561.868604.521-41.98217279.331-4.273
Percentage of ChangeInCapitalExpendituresIncurredButNotYetPaid100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

sm:Derivativesettlementgainorloss

sm:Derivativesettlementgainorloss


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value-142.528-73.437-15.379-24.722-4.094.9693340-36.665-24.5288.168-13.092160.007
Percentage of Derivativesettlementgainorloss100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

sm:Derivativesettlementgainorloss us-gaap:DerivativeInstrumentRisk

sm:GasContracts


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value-1.054-14.625-9.264-12.21-5.6684.134170.802-0.7576.41-24.512-24.0882117
Percentage of Derivativesettlementgainorloss0.719.960.249.4138.683.252.82.02.1-26.1-300.1184.0133.4250085.7

sm:NGLContracts


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value-2.868-5.23-11.496-14.758-9.111-0.5349.12823-11.478-10.19158.524-2.694-8.415
Percentage of Derivativesettlementgainorloss2.07.174.859.7222.8-10.726.956.831.341.5193.6-65.1-16.5-120214.3

sm:OilContracts


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value-138.606-53.5825.3812.246101.3696.88416-24.43-20.748162.472-2.754-9.084
Percentage of Derivativesettlementgainorloss97.273.0-35.0-9.1-261.327.620.341.366.684.6206.5-18.9-16.9-129771.4

sm:GainsLossesonExtinguishmentofDebtNonCashPortion us-gaap:DebtInstrument, us-gaap:ExtinguishmentOfDebt

sm:GainsLossesonExtinguishmentofDebtNonCashPortion

sm:A150SeniorUnsecuredConvertibleNotesDue2021, sm:AcceleratedUnamortizedDebtDiscount


None
Period End2020-06-17
Value6.1
Percentage of GainsLossesonExtinguishmentofDebtNonCashPortion100.0

sm:A150SeniorUnsecuredConvertibleNotesDue2021, sm:AcceleratedUnamortizedDeferredFinancingCosts


None
Period End2020-06-17
Value0.593
Percentage of GainsLossesonExtinguishmentofDebtNonCashPortion9.7

sm:A6125SeniorUnsecuredNotesDue2022, sm:AcceleratedUnamortizedDeferredFinancingCosts


None
Period End2020-03-31
Value0.235
Percentage of GainsLossesonExtinguishmentofDebtNonCashPortion0.0

sm:SeniorUnsecuredNotes, sm:AcceleratedUnamortizedDeferredFinancingCosts


None
Period End2020-06-17
Value5.0
Percentage of GainsLossesonExtinguishmentofDebtNonCashPortion82.0

sm:ImpairmentofProvedOilandGasProperties

sm:ImpairmentofProvedOilandGasProperties


None
Period End2020-06-302020-03-312019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-31
Value0.09560.00.00.00.00.00.00.00.03.8060.0768.0490.0269344551255
Percentage of ImpairmentofProvedOilandGasProperties0.0100.00.00.00.00.00.00.00.00.0100.00.0100.0100.00.0100.0100.0100.0100.0100.0

sm:ImpairmentofUnprovedOilandGasProperties

sm:ImpairmentofUnprovedOilandGasProperties


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value8.8338.7086.337126.338239.055115.625
Percentage of ImpairmentofUnprovedOilandGasProperties100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

sm:InterestPaidSeniorNotesAccruedAndUnpaid us-gaap:DebtInstrument

sm:InterestPaidSeniorNotesAccruedAndUnpaid

sm:A150SeniorUnsecuredConvertibleNotesDue2021


None
Period End2020-06-17
Value740000.0
Percentage of InterestPaidSeniorNotesAccruedAndUnpaid100.0

sm:SeniorUnsecuredNotes


None
Period End2020-06-17
Value8100000.0
Percentage of InterestPaidSeniorNotesAccruedAndUnpaid1094.6

sm:LetterofCreditDividendRestrictionsAmount us-gaap:CreditFacility, us-gaap:LongtermDebtType

sm:LetterofCreditDividendRestrictionsAmount

us-gaap:RevolvingCreditFacility, us-gaap:LineOfCredit


None
Period End2020-06-302020-03-31
Value1250
Percentage of LetterofCreditDividendRestrictionsAmount100.0100.0

sm:LetterofCreditDividendRestrictionsAmount us-gaap:CreditFacility, us-gaap:LongtermDebtType, us-gaap:SubsequentEventType

us-gaap:RevolvingCreditFacility, us-gaap:LineOfCredit, us-gaap:SubsequentEvent


None
Period End2020-04-29
Value12
Percentage of LetterofCreditDividendRestrictionsAmount0.0

sm:OperatingLeasePaymentsInvestingActivities

sm:OperatingLeasePaymentsInvestingActivities


None
Period End2020-06-302020-03-312019-06-302019-03-31
Value2.2083.988.6266.182
Percentage of OperatingLeasePaymentsInvestingActivities100.0100.0100.0100.0

sm:StockIssuedDuringPeriodSharesRestrictedStockUnitsAndPerformanceShareUnits us-gaap:StatementEquityComponents

sm:StockIssuedDuringPeriodSharesRestrictedStockUnitsAndPerformanceShareUnits

us-gaap:CommonStock


None
Period End2020-03-312019-09-302019-06-302019-03-312018-09-302018-06-30
Value730.0331530.0290.02579.0290580.01161.0
Percentage of StockIssuedDuringPeriodSharesRestrictedStockUnitsAndPerformanceShareUnits100.0100.0100.0100.0100.0100.0

sm:StockIssuedDuringPeriodValueRestrictedStockUnitsAndPerformanceShareUnits

sm:StockIssuedDuringPeriodValueRestrictedStockUnitsAndPerformanceShareUnits


None
Period End2020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302017-12-312017-09-302017-06-302017-03-312016-12-31
Value-3000.0-1640000.0-2000.0-18000.0-2965000.0-10000.00-1229000.00-11000.0-13000.0
Percentage of StockIssuedDuringPeriodValueRestrictedStockUnitsAndPerformanceShareUnits100.0100.0100.0100.0100.0100.00.0100.00.0100.0100.0

sm:StockIssuedDuringPeriodValueRestrictedStockUnitsAndPerformanceShareUnits us-gaap:StatementEquityComponents

us-gaap:AdditionalPaidInCapital


None
Period End2020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302017-12-312017-09-302017-06-302017-03-312016-12-31
Value-3000.0-1644000.0-2000.0-18000.0-2968000.0-10000.00-1230000.00-11000.0-13000.0
Percentage of StockIssuedDuringPeriodValueRestrictedStockUnitsAndPerformanceShareUnits100.0100.2100.0100.0100.1100.00.0100.10.0100.0100.0

us-gaap:CommonStock


None
Period End2020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302017-12-312017-09-302016-12-31
Value04000.0003000.0001000.00
Percentage of StockIssuedDuringPeriodValueRestrictedStockUnitsAndPerformanceShareUnits-0.0-0.2-0.0-0.0-0.1-0.00.0-0.1-0.0

us-gaap:AdjustmentsToAdditionalPaidInCapitalWarrantIssued

us-gaap:AdjustmentsToAdditionalPaidInCapitalWarrantIssued


None
Period End2020-06-30
Value21
Percentage of AdjustmentsToAdditionalPaidInCapitalWarrantIssued100.0

us-gaap:AdjustmentsToAdditionalPaidInCapitalWarrantIssued us-gaap:StatementEquityComponents

us-gaap:AdditionalPaidInCapital


None
Period End2020-06-30
Value21
Percentage of AdjustmentsToAdditionalPaidInCapitalWarrantIssued100.0

us-gaap:AmortizationOfFinancingCostsAndDiscounts

us-gaap:AmortizationOfFinancingCostsAndDiscounts


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value4.5863.9923.923.9213.8443.7893.7163.7923.8843.8663.7983.7993.7334.9464.2513.7572.85-0.921.9071.9111.9351.9571.7131.4791.4771.4771.4761.4741.3631.0771.0771.0760.9513.6653.6013.4047.6743.623.4423.3653.3663.291
Percentage of AmortizationOfFinancingCostsAndDiscounts100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:CommonStockDividendsPerShareDeclared

us-gaap:CommonStockDividendsPerShareDeclared


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value00.0100.0500.0500.0500.0500.0500.0500.0500.0500.0500.0500.0500.0500.0500.0500.0500.0500.0500.0500.0500.05
Percentage of CommonStockDividendsPerShareDeclared0.0100.00.0100.00.0100.00.0100.00.0100.00.0100.00.0100.00.0100.00.0100.00.0100.00.0100.00.0100.00.0100.00.0100.00.0100.00.0100.00.0100.00.0100.00.0100.00.0100.00.0100.0

us-gaap:ConcentrationRiskPercentage1 us-gaap:StatementGeographical, us-gaap:ConcentrationRiskByBenchmark, us-gaap:ConcentrationRiskByType

us-gaap:ConcentrationRiskPercentage1

sm:MidlandBasin, us-gaap:SalesRevenueNet, us-gaap:GeographicConcentrationRisk


None
Period End2020-06-302020-03-312019-09-302019-06-302019-03-312018-09-30
Value0.740.810.760.750.710.68
Percentage of ConcentrationRiskPercentage1100.0100.0100.0100.0100.0100.0

sm:SouthTexas, us-gaap:SalesRevenueNet, us-gaap:GeographicConcentrationRisk


None
Period End2020-06-302020-03-312019-09-302019-06-302019-03-312018-09-30
Value0.260.190.240.250.290.32
Percentage of ConcentrationRiskPercentage135.123.531.633.340.847.1

us-gaap:CurrentFederalTaxExpenseBenefit

us-gaap:CurrentFederalTaxExpenseBenefit


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-30
Value0.00.00.0-3.8260.00.00.00.00.00.05.698-2.832-4.6077.4392.9320.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0-31.612202.2126.944-7.5072.194-1.759
Percentage of CurrentFederalTaxExpenseBenefit0.00.00.0100.00.00.00.00.00.00.0100.0100.0100.0100.0100.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:CurrentStateAndLocalTaxExpenseBenefit

us-gaap:CurrentStateAndLocalTaxExpenseBenefit


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-30
Value0.2360.3390.5090.32-0.1760.9650.9920.085-0.040.6251.7650.23-2.4393.8421.2740.0240.0770.164-0.521-8.308100.274-0.6120.4790.5120.4891.819-0.0460.2460.102-0.0650.174-0.1320.3930.5170.6370.2240.1750.0510.277-0.021
Percentage of CurrentStateAndLocalTaxExpenseBenefit100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DebtInstrumentBasisSpreadOnVariableRate1 sm:DebtInstrumentBorrowingBaseUtilizationPercentage, us-gaap:CreditFacility, us-gaap:LongtermDebtType, us-gaap:SubsequentEventType, us-gaap:VariableRate

us-gaap:DebtInstrumentBasisSpreadOnVariableRate1

sm:BorrowingBaseUtilizationOf25PercentOrMoreButLessThan50Percent, us-gaap:RevolvingCreditFacility, us-gaap:LineOfCredit, us-gaap:SubsequentEvent, us-gaap:Eurodollar


None
Period End2020-04-29
Value0.02
Percentage of DebtInstrumentBasisSpreadOnVariableRate1100.0

sm:BorrowingBaseUtilizationOf25PercentOrMoreButLessThan50Percent, us-gaap:RevolvingCreditFacility, us-gaap:LineOfCredit, us-gaap:SubsequentEvent, us-gaap:PrimeRate


None
Period End2020-04-29
Value0.01
Percentage of DebtInstrumentBasisSpreadOnVariableRate150.0

sm:BorrowingBaseUtilizationOf50PercentOrMoreButLessThan75Percent, us-gaap:RevolvingCreditFacility, us-gaap:LineOfCredit, us-gaap:SubsequentEvent, us-gaap:Eurodollar


None
Period End2020-04-29
Value0.025
Percentage of DebtInstrumentBasisSpreadOnVariableRate1125.0

sm:BorrowingBaseUtilizationOf50PercentOrMoreButLessThan75Percent, us-gaap:RevolvingCreditFacility, us-gaap:LineOfCredit, us-gaap:SubsequentEvent, us-gaap:PrimeRate


None
Period End2020-04-29
Value0.015
Percentage of DebtInstrumentBasisSpreadOnVariableRate175.0

sm:BorrowingBaseUtilizationOf75PercentOrMoreButLessThan90Percent, us-gaap:RevolvingCreditFacility, us-gaap:LineOfCredit, us-gaap:SubsequentEvent, us-gaap:Eurodollar


None
Period End2020-04-29
Value0.0275
Percentage of DebtInstrumentBasisSpreadOnVariableRate1137.5

sm:BorrowingBaseUtilizationOf75PercentOrMoreButLessThan90Percent, us-gaap:RevolvingCreditFacility, us-gaap:LineOfCredit, us-gaap:SubsequentEvent, us-gaap:PrimeRate


None
Period End2020-04-29
Value0.0175
Percentage of DebtInstrumentBasisSpreadOnVariableRate187.5

sm:BorrowingBaseUtilizationOf90PercentOrMore, us-gaap:RevolvingCreditFacility, us-gaap:LineOfCredit, us-gaap:SubsequentEvent, us-gaap:Eurodollar


None
Period End2020-04-29
Value0.03
Percentage of DebtInstrumentBasisSpreadOnVariableRate1150.0

sm:BorrowingBaseUtilizationOf90PercentOrMore, us-gaap:RevolvingCreditFacility, us-gaap:LineOfCredit, us-gaap:SubsequentEvent, us-gaap:PrimeRate


None
Period End2020-04-29
Value0.02
Percentage of DebtInstrumentBasisSpreadOnVariableRate1100.0

sm:BorrowingBaseUtilizationOfLessThan25Percent, us-gaap:RevolvingCreditFacility, us-gaap:LineOfCredit, us-gaap:SubsequentEvent, us-gaap:Eurodollar


None
Period End2020-04-29
Value0.0175
Percentage of DebtInstrumentBasisSpreadOnVariableRate187.5

sm:BorrowingBaseUtilizationOfLessThan25Percent, us-gaap:RevolvingCreditFacility, us-gaap:LineOfCredit, us-gaap:SubsequentEvent, us-gaap:PrimeRate


None
Period End2020-04-29
Value0.0075
Percentage of DebtInstrumentBasisSpreadOnVariableRate137.5

us-gaap:DebtInstrumentBasisSpreadOnVariableRate1 sm:DebtInstrumentBorrowingBaseUtilizationPercentage, us-gaap:CreditFacility, us-gaap:LongtermDebtType, us-gaap:VariableRate

sm:BorrowingBaseUtilizationOf25PercentOrMoreButLessThan50Percent, us-gaap:RevolvingCreditFacility, us-gaap:LineOfCredit, us-gaap:Eurodollar


None
Period End2020-06-30
Value0.02
Percentage of DebtInstrumentBasisSpreadOnVariableRate10.0

sm:BorrowingBaseUtilizationOf25PercentOrMoreButLessThan50Percent, us-gaap:RevolvingCreditFacility, us-gaap:LineOfCredit, us-gaap:PrimeRate


None
Period End2020-06-30
Value0.01
Percentage of DebtInstrumentBasisSpreadOnVariableRate10.0

sm:BorrowingBaseUtilizationOf50PercentOrMoreButLessThan75Percent, us-gaap:RevolvingCreditFacility, us-gaap:LineOfCredit, us-gaap:Eurodollar


None
Period End2020-06-30
Value0.025
Percentage of DebtInstrumentBasisSpreadOnVariableRate10.0

sm:BorrowingBaseUtilizationOf50PercentOrMoreButLessThan75Percent, us-gaap:RevolvingCreditFacility, us-gaap:LineOfCredit, us-gaap:PrimeRate


None
Period End2020-06-30
Value0.015
Percentage of DebtInstrumentBasisSpreadOnVariableRate10.0

sm:BorrowingBaseUtilizationOf75PercentOrMoreButLessThan90Percent, us-gaap:RevolvingCreditFacility, us-gaap:LineOfCredit, us-gaap:Eurodollar


None
Period End2020-06-30
Value0.0275
Percentage of DebtInstrumentBasisSpreadOnVariableRate10.0

sm:BorrowingBaseUtilizationOf75PercentOrMoreButLessThan90Percent, us-gaap:RevolvingCreditFacility, us-gaap:LineOfCredit, us-gaap:PrimeRate


None
Period End2020-06-30
Value0.0175
Percentage of DebtInstrumentBasisSpreadOnVariableRate10.0

sm:BorrowingBaseUtilizationOf90PercentOrMore, us-gaap:RevolvingCreditFacility, us-gaap:LineOfCredit, us-gaap:Eurodollar


None
Period End2020-06-30
Value0.03
Percentage of DebtInstrumentBasisSpreadOnVariableRate10.0

sm:BorrowingBaseUtilizationOf90PercentOrMore, us-gaap:RevolvingCreditFacility, us-gaap:LineOfCredit, us-gaap:PrimeRate


None
Period End2020-06-30
Value0.02
Percentage of DebtInstrumentBasisSpreadOnVariableRate10.0

sm:BorrowingBaseUtilizationOfLessThan25Percent, us-gaap:RevolvingCreditFacility, us-gaap:LineOfCredit, us-gaap:Eurodollar


None
Period End2020-06-30
Value0.0175
Percentage of DebtInstrumentBasisSpreadOnVariableRate10.0

sm:BorrowingBaseUtilizationOfLessThan25Percent, us-gaap:RevolvingCreditFacility, us-gaap:LineOfCredit, us-gaap:PrimeRate


None
Period End2020-06-30
Value0.0075
Percentage of DebtInstrumentBasisSpreadOnVariableRate10.0

us-gaap:DefinedBenefitPlanAmortizationOfGainsLosses

us-gaap:DefinedBenefitPlanAmortizationOfGainsLosses


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-30
Value-235000.0-240000.0-240000.0-239000.0-147000.0-332000.0-332000.0-331000.0-340000.0-324000.0-324000.0-324000.0-253000.0-396000.0-395000.0-396000.0-419000.0-372000.0-372000.0-371000.0-571000.0-172000.0-173000.0-172000.0-38000.0-306000.0-305000.0-306000.0-414000.0-197000.0-163000.0-197000.0-293000.0-101000.0-101000.0-102000.0-111000.0
Percentage of DefinedBenefitPlanAmortizationOfGainsLosses100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DefinedBenefitPlanAmortizationOfPriorServiceCostCredit

us-gaap:DefinedBenefitPlanAmortizationOfPriorServiceCostCredit


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-30
Value5000.04000.04000.04000.05000.04000.05000.04000.05000.04000.04000.04000.05000.04000.03000.04000.05000.04000.04000.04000.05000.04000.04000.04000.05000.04000.04000.04000.05000.04000.04000.04000.09000.00000
Percentage of DefinedBenefitPlanAmortizationOfPriorServiceCostCredit100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.00.00.00.0

us-gaap:DefinedBenefitPlanExpectedReturnOnPlanAssets

us-gaap:DefinedBenefitPlanExpectedReturnOnPlanAssets


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-30
Value474000.0393000.0394000.0393000.0321000.0466000.0465000.0466000.0370000.0561000.0561000.0561000.0563000.0559000.0558000.0559000.0573000.0545000.0545000.0546000.0597000.0494000.0495000.0494000.0604000.0385000.0385000.0384000.0483000.0286000.0307000.0286000.0352000.0220000.0879340.0220.0281000.0159000.0637520.0159.0159000.0
Percentage of DefinedBenefitPlanExpectedReturnOnPlanAssets100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DefinedBenefitPlanInterestCost

us-gaap:DefinedBenefitPlanInterestCost


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-30
Value480000.0698000.0697000.0699000.0739000.0656000.0655000.0657000.0637000.0673000.0672000.0673000.0617000.0727000.0727000.0727000.0830000.0624000.0624000.0624000.0700000.0548000.0548000.0548000.0688000.0407000.0407000.0407000.0468000.0345000.0340000.0345000.0393000.0296000.01183100.0296.0312000.0280000.01119200.0280.0280000.0
Percentage of DefinedBenefitPlanInterestCost100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DefinedBenefitPlanNetPeriodicBenefitCost

us-gaap:DefinedBenefitPlanNetPeriodicBenefitCost


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-30
Value1.1091.9441.9431.9441.6782.2092.2092.2092.3172.15.1072.11.5812.6182.6172.6182.7942.4422.7912.4423.0691.8141.8131.8141.7221.9051.9041.9052.3181.4921.4371.4921.8581.1274.5056180.0011281.1941.064.237820.001061.06
Percentage of DefinedBenefitPlanNetPeriodicBenefitCost100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DefinedBenefitPlanServiceCost

us-gaap:DefinedBenefitPlanServiceCost


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-30
Value863000.01395000.01396000.01395000.01108000.01683000.01682000.01683000.01705000.01660000.01659000.01660000.01269000.02050000.02050000.02050000.02113000.01987000.01986000.01989000.02390000.01584000.01583000.01584000.01595000.01573000.01573000.01572000.01914000.01232000.01237000.01232000.01515000.0950000.03797200.0950.01052000.0848000.03389500.0848.0848000.0
Percentage of DefinedBenefitPlanServiceCost100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DerivativeNonmonetaryNotionalAmountEnergyMeasure sm:DerivativeUnderlyingIndex, us-gaap:DerivativeInstrumentRisk

us-gaap:DerivativeNonmonetaryNotionalAmountEnergyMeasure

sm:IfHsc, sm:GasSwapsContractFourthQuarterYear1


None
Period End2020-06-302020-03-312019-12-31
Value932700069940003722000
Percentage of DerivativeNonmonetaryNotionalAmountEnergyMeasure100.0100.0100.0

sm:IfHsc, sm:GasSwapsContractYear2


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-31
Value41736000286210000.011773000109630009123000
Percentage of DerivativeNonmonetaryNotionalAmountEnergyMeasure447.5409.20.00.00.00.0

sm:IfHsc, sm:GasSwapsContracts


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-31
Value61660000503720002149800026206000394980004883500066331000
Percentage of DerivativeNonmonetaryNotionalAmountEnergyMeasure661.1720.2577.60.00.00.00.0

sm:WAHA, sm:GasSwapsContractFourthQuarterYear1


None
Period End2020-06-302020-03-312019-12-31
Value487200045160003419000
Percentage of DerivativeNonmonetaryNotionalAmountEnergyMeasure52.264.691.9

sm:WAHA, sm:GasSwapsContractSecondQuarterYear1


None
Period End2020-03-312019-12-31
Value35920003196000
Percentage of DerivativeNonmonetaryNotionalAmountEnergyMeasure51.485.9

sm:WAHA, sm:GasSwapsContractThirdQuarterYear1


None
Period End2020-06-302020-03-312019-12-31
Value462800042940003268000
Percentage of DerivativeNonmonetaryNotionalAmountEnergyMeasure49.661.487.8

sm:WAHA, sm:GasSwapsContractYear2


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-31
Value20676000175330004224000497700040340002060000
Percentage of DerivativeNonmonetaryNotionalAmountEnergyMeasure221.7250.7113.50.00.00.0

sm:WAHA, sm:GasSwapsContractYear3


None
Period End2020-06-302020-03-31
Value26810000.0
Percentage of DerivativeNonmonetaryNotionalAmountEnergyMeasure28.70.0

sm:WAHA, sm:GasSwapsContracts


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-31
Value3285700029935000172060007939000113360001390800010809000
Percentage of DerivativeNonmonetaryNotionalAmountEnergyMeasure352.3428.0462.30.00.00.00.0

us-gaap:DerivativeNonmonetaryNotionalAmountEnergyMeasure sm:DerivativeUnderlyingIndex, us-gaap:DerivativeInstrumentRisk, us-gaap:SubsequentEventType

sm:GDWAHA, sm:GasSwapsContracts, us-gaap:SubsequentEvent


None
Period End2020-07-30
Value920000
Percentage of DerivativeNonmonetaryNotionalAmountEnergyMeasure0.0

sm:IFWAHA, sm:GasSwapsContracts, us-gaap:SubsequentEvent


None
Period End2020-04-28
Value2437000
Percentage of DerivativeNonmonetaryNotionalAmountEnergyMeasure0.0

sm:IfHsc, sm:GasSwapsContracts, us-gaap:SubsequentEvent


None
Period End2020-04-28
Value6197000
Percentage of DerivativeNonmonetaryNotionalAmountEnergyMeasure0.0

us-gaap:DividendsCommonStockCash

us-gaap:DividendsCommonStockCash


None
Period End2020-03-312019-09-302019-03-312018-09-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-03-312015-12-312015-03-312014-12-312014-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value1.135.6435.6125.6075.5840.016-11.1265.5630.0033.43.3723.43.3233.353-0.001-9.5620.0093.17212-9.4410.0033.141
Percentage of DividendsCommonStockCash100.0100.0100.0100.0100.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DividendsCommonStockCash us-gaap:StatementEquityComponents

us-gaap:RetainedEarnings


None
Period End2020-03-312019-09-302019-03-312018-09-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value1.135.6435.6125.6075.5840.016-11.1265.5630.003-0.001-9.5620.0093.17212-9.4410.0033.141
Percentage of DividendsCommonStockCash100.0100.0100.0100.0100.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:EarlyRepaymentOfSeniorDebt

us-gaap:EarlyRepaymentOfSeniorDebt


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-31
Value0.0280.00.00.00.00.0188440.00.00.00.00.02.3440.00.09.987190.00.03500.0
Percentage of EarlyRepaymentOfSeniorDebt0.0100.00.00.00.00.0100.0100.00.00.00.00.00.0100.00.00.0100.0100.00.00.0100.00.0

us-gaap:ExplorationExpense

us-gaap:ExplorationExpense


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value9.78711171110111413141316141311231313153719253749342421211620152425221819119.6031221141413
Percentage of ExplorationExpense100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:GainLossOnDerivativeInstrumentsNetPretax

us-gaap:GainLossOnDerivativeInstrumentsNetPretax


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value-167.2545-101.00210079-177.081411-178.026-63.749-7.529-115.778-80.59955114-129.54728-163.35114123212-80.929154616190-126.469-97.662-39.93385-30.5720.5010.1851.652-6.159-6.843-6.33-1.3752.6948.8479.3292.595
Percentage of GainLossOnDerivativeInstrumentsNetPretax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:GainLossOnDerivativeInstrumentsNetPretax us-gaap:DerivativeInstrumentRisk

sm:GasContracts


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-31
Value-8.261-6.7284.8684.228256.113-14.112-4.309-7.0-9.99196.0686.03844-56.614-62.48924
Percentage of GainLossOnDerivativeInstrumentsNetPretax4.9-1.2-4.84.232.6-3.5-3.42.411.0132.7-17.1-7.510.938.743.750.038.3168.8

sm:NGLContracts


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-31
Value-7.6899.528-1.07612192.60386-63.304-34.34716-22.107-40.7931020-37.18513-40.089-20.227
Percentage of GainLossOnDerivativeInstrumentsNetPretax4.61.71.112.624.0-1.521.035.653.9-218.219.150.619.918.028.747.424.5-142.2

sm:OilContracts


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-30
Value-151.25542-104.7948334-185.797338-110.413-22.402-13.966-113.412-45.8743849-35.7620.733-60.773
Percentage of GainLossOnDerivativeInstrumentsNetPretax90.599.5103.883.243.4104.982.462.035.1185.598.056.969.243.227.62.637.2

us-gaap:GainLossOnSaleOfOilAndGasProperty

us-gaap:GainLossOnSaleOfOilAndGasProperty


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-31
Value0.0910.00.5390.00.2620.0611.2610.786393850.537-1.895-167.13337332250-69.0214.5342.41571-35.8020.594-5.4322.5262.958
Percentage of GainLossOnSaleOfOilAndGasProperty100.00.0100.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ImpairmentOfOilAndGasProperties

us-gaap:ImpairmentOfOilAndGasProperties


None
Period End2020-06-302020-03-312019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302010-12-312010-09-30
Value8.75989126.338239.055115.625120.00.00.0551255840.00.02.8011105.93534211700.0380.142170480.06.1270.0
Percentage of ImpairmentOfOilAndGasProperties100.0100.0100.0100.0100.0100.0100.0100.0100.00.00.00.0100.0100.0100.0100.00.00.0100.0100.0100.0100.0100.0100.00.0100.0100.0100.0100.00.0100.00.0

us-gaap:IncreaseDecreaseInOperatingCapital

us-gaap:IncreaseDecreaseInOperatingCapital


None
Period End2020-06-302020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-312017-09-30
Value38189.673-41.61320-17.9975.60916-11.971
Percentage of IncreaseDecreaseInOperatingCapital100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:IncrementalCommonSharesAttributableToShareBasedPaymentArrangements

us-gaap:IncrementalCommonSharesAttributableToShareBasedPaymentArrangements


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-30
Value000530000.0670000.00-174000.001929000.01183000.000071000.000000158000.000-275000.01051000.01170000.01070000.0-100000.01310000.01598000.01310000.0-1870000.002149000.02210000.03000.02062000.02182000.0035000.01763000.01649000.0
Percentage of IncrementalCommonSharesAttributableToShareBasedPaymentArrangements0.00.00.0100.0100.00.0100.00.0100.0100.00.00.00.0100.00.00.00.00.00.0100.00.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0100.0100.0100.0100.0100.00.0100.0100.0100.0

us-gaap:InterestCostsCapitalized

us-gaap:InterestCostsCapitalized


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value4.12.74.44.25.04.94.95.26.04.5
Percentage of InterestCostsCapitalized100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:LeaseCost

us-gaap:LeaseCost


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-31
Value627220107139175
Percentage of LeaseCost100.0100.0100.0100.0100.0100.0

us-gaap:LineOfCreditFacilityUnusedCapacityCommitmentFeePercentage sm:DebtInstrumentBorrowingBaseUtilizationPercentage, us-gaap:CreditFacility, us-gaap:LongtermDebtType

us-gaap:LineOfCreditFacilityUnusedCapacityCommitmentFeePercentage

sm:BorrowingBaseUtilizationOf25PercentOrMoreButLessThan50Percent, us-gaap:RevolvingCreditFacility, us-gaap:LineOfCredit


None
Period End2020-06-30
Value0.00375
Percentage of LineOfCreditFacilityUnusedCapacityCommitmentFeePercentage100.0

sm:BorrowingBaseUtilizationOf50PercentOrMoreButLessThan75Percent, us-gaap:RevolvingCreditFacility, us-gaap:LineOfCredit


None
Period End2020-06-30
Value0.005
Percentage of LineOfCreditFacilityUnusedCapacityCommitmentFeePercentage133.3

sm:BorrowingBaseUtilizationOf75PercentOrMoreButLessThan90Percent, us-gaap:RevolvingCreditFacility, us-gaap:LineOfCredit


None
Period End2020-06-30
Value0.005
Percentage of LineOfCreditFacilityUnusedCapacityCommitmentFeePercentage133.3

sm:BorrowingBaseUtilizationOf90PercentOrMore, us-gaap:RevolvingCreditFacility, us-gaap:LineOfCredit


None
Period End2020-06-30
Value0.005
Percentage of LineOfCreditFacilityUnusedCapacityCommitmentFeePercentage133.3

sm:BorrowingBaseUtilizationOfLessThan25Percent, us-gaap:RevolvingCreditFacility, us-gaap:LineOfCredit


None
Period End2020-06-30
Value0.00375
Percentage of LineOfCreditFacilityUnusedCapacityCommitmentFeePercentage100.0

us-gaap:LineOfCreditFacilityUnusedCapacityCommitmentFeePercentage sm:DebtInstrumentBorrowingBaseUtilizationPercentage, us-gaap:CreditFacility, us-gaap:LongtermDebtType, us-gaap:SubsequentEventType

sm:BorrowingBaseUtilizationOf25PercentOrMoreButLessThan50Percent, us-gaap:RevolvingCreditFacility, us-gaap:LineOfCredit, us-gaap:SubsequentEvent


None
Period End2020-04-29
Value0.00375
Percentage of LineOfCreditFacilityUnusedCapacityCommitmentFeePercentage0.0

sm:BorrowingBaseUtilizationOf50PercentOrMoreButLessThan75Percent, us-gaap:RevolvingCreditFacility, us-gaap:LineOfCredit, us-gaap:SubsequentEvent


None
Period End2020-04-29
Value0.005
Percentage of LineOfCreditFacilityUnusedCapacityCommitmentFeePercentage0.0

sm:BorrowingBaseUtilizationOf75PercentOrMoreButLessThan90Percent, us-gaap:RevolvingCreditFacility, us-gaap:LineOfCredit, us-gaap:SubsequentEvent


None
Period End2020-04-29
Value0.005
Percentage of LineOfCreditFacilityUnusedCapacityCommitmentFeePercentage0.0

sm:BorrowingBaseUtilizationOf90PercentOrMore, us-gaap:RevolvingCreditFacility, us-gaap:LineOfCredit, us-gaap:SubsequentEvent


None
Period End2020-04-29
Value0.005
Percentage of LineOfCreditFacilityUnusedCapacityCommitmentFeePercentage0.0

sm:BorrowingBaseUtilizationOfLessThan25Percent, us-gaap:RevolvingCreditFacility, us-gaap:LineOfCredit, us-gaap:SubsequentEvent


None
Period End2020-04-29
Value0.00375
Percentage of LineOfCreditFacilityUnusedCapacityCommitmentFeePercentage0.0

us-gaap:NoncashOrPartNoncashAcquisitionNetNonmonetaryAssetsAcquiredLiabilitiesAssumed1

us-gaap:NoncashOrPartNoncashAcquisitionNetNonmonetaryAssetsAcquiredLiabilitiesAssumed1


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312014-06-302013-09-30
Value0.00.02.6344.220.8650.0950.00.0255240.00.00.00.7336.225
Percentage of NoncashOrPartNoncashAcquisitionNetNonmonetaryAssetsAcquiredLiabilitiesAssumed10.00.0100.0100.0100.0100.00.0100.00.00.0100.0100.00.00.00.0100.0100.0100.0

us-gaap:OperatingLeaseCost

us-gaap:OperatingLeaseCost


None
Period End2020-06-302020-03-312019-09-302019-06-302019-03-31
Value4.4536.8348.344118.979
Percentage of OperatingLeaseCost100.0100.0100.0100.0100.0

us-gaap:OperatingLeasePayments

us-gaap:OperatingLeasePayments


None
Period End2020-06-302020-03-312019-06-302019-03-31
Value3019000.03046000.03014000.02952000.0
Percentage of OperatingLeasePayments100.0100.0100.0100.0

us-gaap:OtherComprehensiveIncomeDefinedBenefitPlansAdjustmentNetOfTaxPortionAttributableToParent

us-gaap:OtherComprehensiveIncomeDefinedBenefitPlansAdjustmentNetOfTaxPortionAttributableToParent


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value-188000.0-190000.0-489000.0-190000.0-119000.0-263000.0-3657000.0-263000.0-198000.0-260000.0-1418000.0208000.0-124000.0567000.0
Percentage of OtherComprehensiveIncomeDefinedBenefitPlansAdjustmentNetOfTaxPortionAttributableToParent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OtherNoncashIncomeExpense

us-gaap:OtherNoncashIncomeExpense


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-30
Value3011000.0816000.0-4511000.01004000.0-1243000.02530000.0-2371000.0-218000.0-225000.02527000.0-3526000.0-2446000.02300000.0-4567000.0-5891000.03068000.0-548000.0-128000.0-10091000.0-4104000.01930000.0-1496000.0-4055000.0-1841000.01724000.03103000.0154000.02840000.0-4737000.0-1032000.0379000.0-1773000.0-251000.01118000.075000.064000.03882000.02006000.0908000.06022000.0
Percentage of OtherNoncashIncomeExpense100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OtherOperatingIncome

us-gaap:OtherOperatingIncome


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-31
Value-0.2491.5012.1460.8980.0560.3930.40.2011.8571.34-1.1862.8152.9152.077-0.0571.1070.6260.274-9.0042.1213.0068.421-16.2891.579209.611-47.241181914-35.127131514
Percentage of OtherOperatingIncome100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OtherOperatingIncomeExpenseNet

us-gaap:OtherOperatingIncomeExpenseNet


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-30
Value-8046000.0-566000.0-19466000.0-1021000.0934000.0-335000.0-4109000.0-9664000.057000.0-4612000.0-7364000.0-999000.0-4251000.0-4859000.0-3041000.05917000.0
Percentage of OtherOperatingIncomeExpenseNet100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:PaymentsForProceedsFromOtherInvestingActivities

us-gaap:PaymentsForProceedsFromOtherInvestingActivities


None
Period End2020-06-302020-03-312019-06-302019-03-312018-03-312017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value00-28000.0-291000.00-514000.0-2486000.03000000.0-900000.01785000.0-885000.0-5000.0-6000.0-1000.0997000.02542000.0-1543000.06484000.0-4227000.0-2650000.0-1431000.02915000.02025000.0-893000.0111000.01439000.0-1550000.0-4001000.0-2015000.002355000.0-2367000.00-8000.06500000.0
Percentage of PaymentsForProceedsFromOtherInvestingActivities0.00.0100.0100.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0100.0100.00.0100.0100.0

us-gaap:PaymentsToExploreAndDevelopOilAndGasProperties

us-gaap:PaymentsToExploreAndDevelopOilAndGasProperties


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value170139235212326249270309421301263258212154137147169176231287429544656539426351432387352381381421370335551419352309179184172132
Percentage of PaymentsToExploreAndDevelopOilAndGasProperties100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ProceedsFromLinesOfCredit

us-gaap:ProceedsFromLinesOfCredit


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value4154254644285241720.00.00.00.00.00.08.53972041582683172683746705607495360.00.022646029322337443277626206130.010225611126177
Percentage of ProceedsFromLinesOfCredit100.0100.0100.0100.0100.0100.00.00.00.00.00.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0100.0100.0100.0100.0100.0

us-gaap:ProceedsFromPaymentsForOtherFinancingActivities

us-gaap:ProceedsFromPaymentsForOtherFinancingActivities


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value-351000.0-3000.0-2000.0-1640000.0-1026000.0-18000.0-4771000.0-2842000.0-133000.001221000.0-1231000.0-1000.0-160000.0033000.0-30000.0-3000.0-1000.02000.0-99000.0-62000.0-2000.024000.0-101000.0-8000.04000.020000.0-29000.006000.0-574000.0556000.0-213000.0-6000.0-9323000.0-1000.0-643000.0-1185000.0-364000.0-17000.0-527000.0
Percentage of ProceedsFromPaymentsForOtherFinancingActivities100.0100.0100.0100.0100.0100.0100.0100.0100.00.0100.0100.0100.0100.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ProceedsFromSaleOfOilAndGasPropertyAndEquipment

us-gaap:ProceedsFromSaleOfOilAndGasPropertyAndEquipment


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value0.0920.00.5390.06.4066.1145.310.984251490-1.6461221744744188111.206220.115313211.99-4.953501.9794040.155164.3076.71233131.67939227583952118.751239
Percentage of ProceedsFromSaleOfOilAndGasPropertyAndEquipment100.00.0100.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:RepaymentsOfConvertibleDebt us-gaap:DebtInstrument

us-gaap:RepaymentsOfConvertibleDebt

sm:A150SeniorUnsecuredConvertibleNotesDue2021


None
Period End2020-06-17
Value53
Percentage of RepaymentsOfConvertibleDebt100.0

us-gaap:RepaymentsOfLinesOfCredit

us-gaap:RepaymentsOfLinesOfCredit


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value2944764714174531250.00.00.00.00.00.08.53972044882302262503129653099731460.00.02544606951332622657392.0206130.015021010926365
Percentage of RepaymentsOfLinesOfCredit100.0100.0100.0100.0100.0100.00.00.00.00.00.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0100.0100.0100.0100.0100.0

us-gaap:ResultsOfOperationsDepreciationDepletionAmortizationAndAccretion

us-gaap:ResultsOfOperationsDepreciationDepletionAmortizationAndAccretion


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-30
Value180233228211206177181201151130131134153137171193211214240243219217219183187177202195
Percentage of ResultsOfOperationsDepreciationDepletionAmortizationAndAccretion100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:RightOfUseAssetObtainedInExchangeForOperatingLeaseLiability

us-gaap:RightOfUseAssetObtainedInExchangeForOperatingLeaseLiability


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312019-01-01
Value0.7450.01.3461.285101250
Percentage of RightOfUseAssetObtainedInExchangeForOperatingLeaseLiability100.00.0100.0100.0100.0100.0100.0

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardSharesIssuedInPeriod us-gaap:AwardType, us-gaap:SubsequentEventType

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardSharesIssuedInPeriod

us-gaap:PerformanceShares, us-gaap:SubsequentEvent


None
Period End2020-07-012019-07-01
Value0.485060.0
Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardSharesIssuedInPeriod100.00.0

us-gaap:RestrictedStockUnitsRSU, us-gaap:SubsequentEvent


None
Period End2020-07-012019-07-01
Value0.4205620.33153
Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardSharesIssuedInPeriod86.70.0

us-gaap:SharesPaidForTaxWithholdingForShareBasedCompensation us-gaap:AwardType, us-gaap:SubsequentEventType

us-gaap:SharesPaidForTaxWithholdingForShareBasedCompensation

us-gaap:PerformanceShares, us-gaap:SubsequentEvent


None
Period End2020-07-012016-07-272015-07-222014-07-23
Value0.2154510.0148090.1006830.045042
Percentage of SharesPaidForTaxWithholdingForShareBasedCompensation100.0100.0100.0100.0

us-gaap:RestrictedStockUnitsRSU, us-gaap:SubsequentEvent


None
Period End2020-07-012016-07-272015-07-222014-07-23
Value0.1665260.0700470.0729090.078899
Percentage of SharesPaidForTaxWithholdingForShareBasedCompensation77.3473.072.4175.2

us-gaap:ShortTermLeaseCost

us-gaap:ShortTermLeaseCost


None
Period End2020-06-302020-03-312019-09-302019-06-302019-03-31
Value364372102134
Percentage of ShortTermLeaseCost100.0100.0100.0100.0100.0

us-gaap:StockIssuedDuringPeriodSharesEmployeeStockPurchasePlans us-gaap:StatementEquityComponents

us-gaap:StockIssuedDuringPeriodSharesEmployeeStockPurchasePlans

us-gaap:CommonStock


None
Period End2020-06-302019-06-302018-06-302017-12-312017-09-302011-12-312011-09-302010-12-312010-09-30
Value297010.0184080.0100250.062987.0018985.0025492.00
Percentage of StockIssuedDuringPeriodSharesEmployeeStockPurchasePlans100.0100.0100.0100.00.0100.00.0100.00.0

us-gaap:StockIssuedDuringPeriodSharesShareBasedCompensation us-gaap:StatementEquityComponents

us-gaap:StockIssuedDuringPeriodSharesShareBasedCompensation

us-gaap:CommonStock


None
Period End2020-06-302019-06-302018-06-302011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value267580.096719.058572.055705.021872.0288540.0183030.014446.0130690.018214.0
Percentage of StockIssuedDuringPeriodSharesShareBasedCompensation100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:StockIssuedDuringPeriodSharesShareBasedCompensationGross us-gaap:TitleOfIndividual

us-gaap:StockIssuedDuringPeriodSharesShareBasedCompensationGross

srt:Director


None
Period End2020-06-302019-06-302018-06-30
Value267580.096719.058572.0
Percentage of StockIssuedDuringPeriodSharesShareBasedCompensationGross100.0100.0100.0

us-gaap:StockIssuedDuringPeriodValueEmployeeStockPurchasePlan

us-gaap:StockIssuedDuringPeriodValueEmployeeStockPurchasePlan


None
Period End2020-06-302019-06-302018-06-302017-12-312017-09-302016-12-312011-12-312011-09-302010-12-312010-09-30
Value947000.01959000.01881000.0885000.001844000.01179000.0-1000.0871000.00
Percentage of StockIssuedDuringPeriodValueEmployeeStockPurchasePlan100.0100.0100.0100.00.0100.0100.0100.0100.00.0

us-gaap:StockIssuedDuringPeriodValueEmployeeStockPurchasePlan us-gaap:StatementEquityComponents

us-gaap:AdditionalPaidInCapital


None
Period End2020-06-302019-06-302018-06-302017-12-312017-09-302016-12-312011-12-312011-09-302010-12-312010-09-30
Value944000.01957000.01880000.0884000.001843000.01180000.0-1000.0870000.00
Percentage of StockIssuedDuringPeriodValueEmployeeStockPurchasePlan99.799.999.999.90.099.9100.1100.099.90.0

us-gaap:CommonStock


None
Period End2020-06-302019-06-302018-06-302017-12-312017-09-302016-12-312011-12-312011-09-302010-12-31
Value3000.02000.01000.01000.001000.0-1000.001000.0
Percentage of StockIssuedDuringPeriodValueEmployeeStockPurchasePlan0.30.10.10.10.00.1-0.1-0.00.1

us-gaap:StockIssuedDuringPeriodValueShareBasedCompensation

us-gaap:StockIssuedDuringPeriodValueShareBasedCompensation


None
Period End2020-06-302020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value5.7125.5616.7666.1545.8387.0045.2645.4126.546.3474.3585.4556.412-14.69.0290.8359.7631.9310.6382.7870.268
Percentage of StockIssuedDuringPeriodValueShareBasedCompensation100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:StockIssuedDuringPeriodValueShareBasedCompensation us-gaap:StatementEquityComponents

us-gaap:AdditionalPaidInCapital


None
Period End2020-06-302020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value5.7095.5616.7666.1535.8387.0045.2645.4126.546.3474.3575.4556.412-14.6019.0290.8359.761.9290.6382.7860.268
Percentage of StockIssuedDuringPeriodValueShareBasedCompensation99.9100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.099.9100.0100.0100.0

us-gaap:CommonStock


None
Period End2020-06-302019-06-302018-06-302017-12-312017-09-302016-12-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-30
Value0.0030.0010.00.00.00.00.0010.00.00.0030.0020.0
Percentage of StockIssuedDuringPeriodValueShareBasedCompensation0.10.00.00.00.00.0-0.00.00.00.00.10.0

us-gaap:VariableLeaseCost

us-gaap:VariableLeaseCost


None
Period End2020-06-302020-03-312019-09-302019-06-302019-03-31
Value2122262631
Percentage of VariableLeaseCost100.0100.0100.0100.0100.0

sm:DerivativeOilBasisSwapTypeWeightedAverageContractPrice sm:DerivativeUnderlyingIndex, us-gaap:DerivativeInstrumentRisk

sm:DerivativeOilBasisSwapTypeWeightedAverageContractPrice

sm:NYMEXWTIICEBrent, sm:OilBasisSwapContractYear2


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-31
Value-7.86-7.86-7.86-8.03-8.03-8.03
Percentage of DerivativeOilBasisSwapTypeWeightedAverageContractPrice100.0100.0100.0100.0100.0100.0

sm:NYMEXWTIICEBrent, sm:OilBasisSwapContractYear3


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-31
Value-7.78-7.78-7.78-7.86-7.86-7.86
Percentage of DerivativeOilBasisSwapTypeWeightedAverageContractPrice99.099.099.097.997.997.9

sm:WTIMidlandNYMEXWTI, sm:OilBasisSwapContractFourthQuarterYear1


None
Period End2020-06-302020-03-312019-12-31
Value-0.38-0.38-0.73
Percentage of DerivativeOilBasisSwapTypeWeightedAverageContractPrice4.84.89.3

sm:WTIMidlandNYMEXWTI, sm:OilBasisSwapContractSecondQuarterYear1


None
Period End2020-03-312019-12-31
Value-0.62-0.68
Percentage of DerivativeOilBasisSwapTypeWeightedAverageContractPrice7.98.7

sm:WTIMidlandNYMEXWTI, sm:OilBasisSwapContractThirdQuarterYear1


None
Period End2020-06-302020-03-312019-12-31
Value-0.62-0.62-0.74
Percentage of DerivativeOilBasisSwapTypeWeightedAverageContractPrice7.97.99.4

sm:WTIMidlandNYMEXWTI, sm:OilBasisSwapContractYear2


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-31
Value0.870.870.59-0.73-0.73-1.03
Percentage of DerivativeOilBasisSwapTypeWeightedAverageContractPrice-11.1-11.1-7.59.19.112.8

sm:WTIMidlandNYMEXWTI, sm:OilBasisSwapContractYear3


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-31
Value1.151.1500.330.330.33
Percentage of DerivativeOilBasisSwapTypeWeightedAverageContractPrice-14.6-14.6-0.0-4.1-4.1-4.1

sm:DerivativeOilBasisSwapTypeWeightedAverageContractPrice sm:DerivativeUnderlyingIndex, us-gaap:SubsequentEventType

sm:WTIMidlandNYMEXWTI, us-gaap:SubsequentEvent


None
Period End2020-07-302020-02-19
Value0.211.14
Percentage of DerivativeOilBasisSwapTypeWeightedAverageContractPrice0.00.0

sm:DerivativeRollDifferentialSwapTypeWeightedAverageContractPrice us-gaap:DerivativeInstrumentRisk

sm:DerivativeRollDifferentialSwapTypeWeightedAverageContractPrice

sm:NYMEXOilCalendarMonthAverageRollDifferentialContractFourthQuarterYear1


None
Period End2020-06-30
Value-1.18
Percentage of DerivativeRollDifferentialSwapTypeWeightedAverageContractPrice100.0

sm:NYMEXOilCalendarMonthAverageRollDifferentialContractThirdQuarterYear1


None
Period End2020-06-30
Value-1.34
Percentage of DerivativeRollDifferentialSwapTypeWeightedAverageContractPrice113.6

sm:NYMEXOilCalendarMonthAverageRollDifferentialContractYear2


None
Period End2020-06-30
Value-0.52
Percentage of DerivativeRollDifferentialSwapTypeWeightedAverageContractPrice44.1

sm:IndexPercentOfNaturalGasFixedSwaps sm:DerivativeUnderlyingIndex

sm:IndexPercentOfNaturalGasFixedSwaps

sm:GDWAHA


None
Period End2020-06-30
Value0.29
Percentage of IndexPercentOfNaturalGasFixedSwaps100.0

sm:GDWaha


None
Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-31
Value0.190.080.440.110.120.1
Percentage of IndexPercentOfNaturalGasFixedSwaps0.00.00.00.00.00.0

sm:IFWAHA


None
Period End2020-06-302020-03-312019-12-312019-09-30
Value0.710.810.920.56
Percentage of IndexPercentOfNaturalGasFixedSwaps244.80.00.00.0

sm:LineofCreditFacilityAggregateLenderCommitments us-gaap:CreditFacility, us-gaap:LongtermDebtType

sm:LineofCreditFacilityAggregateLenderCommitments

us-gaap:RevolvingCreditFacility, us-gaap:LineOfCredit


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-04-182019-03-312018-12-312018-09-302018-06-302018-04-242018-03-312017-12-31
Value11001200120012001200120010001000100010001000925925
Percentage of LineofCreditFacilityAggregateLenderCommitments100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

sm:LineofCreditFacilityAggregateLenderCommitments us-gaap:CreditFacility, us-gaap:LongtermDebtType, us-gaap:SubsequentEventType

us-gaap:RevolvingCreditFacility, us-gaap:LineOfCredit, us-gaap:SubsequentEvent


None
Period End2020-07-232020-04-292020-02-062019-10-242019-07-232019-04-252019-04-182019-02-072018-10-242018-07-252018-04-25
Value11001100120012001200120012001000100010001000
Percentage of LineofCreditFacilityAggregateLenderCommitments0.00.00.00.00.00.0100.00.00.00.00.0

sm:PermittedSecondLienDebt

sm:PermittedSecondLienDebt


None
Period End2020-06-30
Value1000
Percentage of PermittedSecondLienDebt100.0

sm:PermittedSecondLienDebt us-gaap:LongtermDebtType

sm:AvailablePermittedSecondLienDebtCapacity


None
Period End2020-06-30
Value487
Percentage of PermittedSecondLienDebt48.8

sm:PotentialPenaltyForNotMeetingMinimumDrillingAndCompletionCounts us-gaap:Range

sm:PotentialPenaltyForNotMeetingMinimumDrillingAndCompletionCounts

srt:Maximum


None
Period End2020-06-30
Value11
Percentage of PotentialPenaltyForNotMeetingMinimumDrillingAndCompletionCounts100.0

srt:Minimum


None
Period End2020-06-30
Value0.0
Percentage of PotentialPenaltyForNotMeetingMinimumDrillingAndCompletionCounts0.0

sm:PotentialPenaltyfornotMeetingMinimumDrillingandCompletionRequirements us-gaap:Range

sm:PotentialPenaltyfornotMeetingMinimumDrillingandCompletionRequirements

srt:Maximum


None
Period End2020-06-30
Value39
Percentage of PotentialPenaltyfornotMeetingMinimumDrillingandCompletionRequirements100.0

srt:Minimum


None
Period End2020-06-30
Value0.0
Percentage of PotentialPenaltyfornotMeetingMinimumDrillingandCompletionRequirements0.0

sm:PotentialPenaltyfornotMeetingMinimumDrillingandCompletionRequirements us-gaap:Range, us-gaap:SubsequentEventType

srt:Maximum, us-gaap:SubsequentEvent


None
Period End2020-04-28
Value42
Percentage of PotentialPenaltyfornotMeetingMinimumDrillingandCompletionRequirements0.0

srt:Minimum, us-gaap:SubsequentEvent


None
Period End2020-04-28
Value0.0
Percentage of PotentialPenaltyfornotMeetingMinimumDrillingandCompletionRequirements0.0

sm:WarrantsPercentOfOutstandingStock

sm:WarrantsPercentOfOutstandingStock


None
Period End2020-06-17
Value0.05
Percentage of WarrantsPercentOfOutstandingStock100.0

sm:WellsInProgress

sm:WellsInProgress


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312009-12-31
Value26622411832525734529532836140532128728618623520141546638745241945950363749527727930129027326427421327332924518314565
Percentage of WellsInProgress100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:AssetRetirementObligationsNoncurrent

us-gaap:AssetRetirementObligationsNoncurrent


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312009-12-31
Value86858495959491100100839666108105137118115108120123117115115101118115112908987877372706960
Percentage of AssetRetirementObligationsNoncurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsIncludingDisposalGroupAndDiscontinuedOperations

us-gaap:CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsIncludingDisposalGroupAndDiscontinuedOperations


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312015-12-312014-12-31
Value0.010.0150.013.5116.410.01477176615643313441559659120.0180.12
Percentage of CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsIncludingDisposalGroupAndDiscontinuedOperations100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ClassOfWarrantOrRightExercisePriceOfWarrantsOrRights1

us-gaap:ClassOfWarrantOrRightExercisePriceOfWarrantsOrRights1


None
Period End2020-06-17
Value0.01
Percentage of ClassOfWarrantOrRightExercisePriceOfWarrantsOrRights1100.0

us-gaap:ClassOfWarrantOrRightNumberOfSecuritiesCalledByWarrantsOrRights

us-gaap:ClassOfWarrantOrRightNumberOfSecuritiesCalledByWarrantsOrRights


None
Period End2020-06-17
Value5900000.0
Percentage of ClassOfWarrantOrRightNumberOfSecuritiesCalledByWarrantsOrRights100.0

us-gaap:ConvertibleDebtNoncurrent

us-gaap:ConvertibleDebtNoncurrent


None
Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302015-12-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312009-12-31
Value1591571541521501471451431411391371341321301280.00.00.00.0287285282280277275266
Percentage of ConvertibleDebtNoncurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.00.00.00.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ConvertibleDebtNoncurrent us-gaap:DebtInstrument

sm:A1.50SeniorConvertibleNotesDue2021


None
Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312016-12-31
Value159157154152150147145143141139130
Percentage of ConvertibleDebtNoncurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DebtInstrumentFaceAmount us-gaap:DebtInstrument

us-gaap:DebtInstrumentFaceAmount

sm:A100SeniorSecuredNotesDue2025


None
Period End2020-06-302020-06-172019-12-31
Value4464460.0
Percentage of DebtInstrumentFaceAmount100.0100.00.0

sm:A150SeniorSecuredConvertibleNotesDue2021


None
Period End2020-06-302019-12-31
Value650.0
Percentage of DebtInstrumentFaceAmount14.70.0

sm:A150SeniorUnsecuredConvertibleNotesDue2021


None
Period End2020-06-302019-12-31
Value0.0172
Percentage of DebtInstrumentFaceAmount0.00.0

sm:A5.625SeniorNotesDue2025


None
Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312017-12-312017-09-302017-06-302016-12-312016-09-302016-06-302016-03-312015-12-312015-05-212014-12-31
Value5005005005005005005005005005005005005005005000.0
Percentage of DebtInstrumentFaceAmount0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

sm:A50SeniorUnsecuredNotesDue2024


None
Period End2020-06-302019-12-31
Value344500
Percentage of DebtInstrumentFaceAmount77.20.0

sm:A5625SeniorUnsecuredNotesDue2025


None
Period End2020-06-302019-12-31
Value349500
Percentage of DebtInstrumentFaceAmount78.20.0

sm:A6.125SeniorNotesDue2022


None
Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312017-12-312017-09-302017-06-302016-12-312016-09-302016-06-302016-03-312015-12-312014-12-312014-11-17
Value436476476476476476561561561561561561561600600600
Percentage of DebtInstrumentFaceAmount0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

sm:A6.625SeniorNotesDue2027


None
Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-08-202017-12-31
Value5005005005005005005000.0
Percentage of DebtInstrumentFaceAmount0.00.00.00.00.00.00.00.0

sm:A6125SeniorUnsecuredNotesDue2022


None
Period End2020-06-302019-12-31
Value294476
Percentage of DebtInstrumentFaceAmount65.90.0

sm:A6625SeniorUnsecuredNotesDue2027


None
Period End2020-06-302019-12-31
Value416500
Percentage of DebtInstrumentFaceAmount93.30.0

sm:A675SeniorUnsecuredNotesDue2026


None
Period End2020-06-302019-12-31
Value419500
Percentage of DebtInstrumentFaceAmount93.90.0

sm:SeniorSecuredNotes


None
Period End2020-06-30
Value512
Percentage of DebtInstrumentFaceAmount114.7

sm:SeniorUnsecuredNotes


None
Period End2020-06-302019-12-31
Value18242649
Percentage of DebtInstrumentFaceAmount408.40.0

us-gaap:SeniorNotes


None
Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302016-12-312011-02-07
Value2436247624762476247624762476280128012801280128012803350
Percentage of DebtInstrumentFaceAmount0.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:DebtInstrumentRepurchasedFaceAmount us-gaap:DebtInstrument

us-gaap:DebtInstrumentRepurchasedFaceAmount

sm:A150SeniorUnsecuredConvertibleNotesDue2021


None
Period End2020-06-17
Value107
Percentage of DebtInstrumentRepurchasedFaceAmount100.0

sm:A50SeniorUnsecuredNotesDue2024


None
Period End2020-06-17
Value155
Percentage of DebtInstrumentRepurchasedFaceAmount145.2

sm:A5625SeniorUnsecuredNotesDue2025


None
Period End2020-06-17
Value150
Percentage of DebtInstrumentRepurchasedFaceAmount141.0

sm:A6125SeniorUnsecuredNotesDue2022


None
Period End2020-06-172020-03-31
Value14140
Percentage of DebtInstrumentRepurchasedFaceAmount132.40.0

sm:A6625SeniorUnsecuredNotesDue2027


None
Period End2020-06-17
Value83
Percentage of DebtInstrumentRepurchasedFaceAmount77.8

sm:A675SeniorUnsecuredNotesDue2026


None
Period End2020-06-17
Value80
Percentage of DebtInstrumentRepurchasedFaceAmount75.5

sm:SeniorUnsecuredNotes


None
Period End2020-06-17
Value611
Percentage of DebtInstrumentRepurchasedFaceAmount571.9

sm:SeniorUnsecuredNotesAnd150SeniorUnsecuredConvertibleNotesDue2021


None
Period End2020-06-17
Value718
Percentage of DebtInstrumentRepurchasedFaceAmount671.9

us-gaap:DebtInstrumentUnamortizedDiscount us-gaap:DebtInstrument

us-gaap:DebtInstrumentUnamortizedDiscount

sm:A1.50SeniorConvertibleNotesDue2021


None
Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312016-12-31
Value1113161820222426283037
Percentage of DebtInstrumentUnamortizedDiscount100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

sm:A100SeniorSecuredNotesDue2025


None
Period End2020-06-30
Value41
Percentage of DebtInstrumentUnamortizedDiscount0.0

sm:A150SeniorSecuredConvertibleNotesDue2021


None
Period End2020-06-30
Value3.592
Percentage of DebtInstrumentUnamortizedDiscount0.0

sm:SeniorSecuredNotes


None
Period End2020-06-30
Value44
Percentage of DebtInstrumentUnamortizedDiscount0.0

us-gaap:DerivativeAssetFairValueOffsetAgainstCollateralNetOfNotSubjectToMasterNettingArrangementPolicyElection

us-gaap:DerivativeAssetFairValueOffsetAgainstCollateralNetOfNotSubjectToMasterNettingArrangementPolicyElection


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312014-12-31
Value1834934013784411770.030114.59338103694.0168099355488592
Percentage of DerivativeAssetFairValueOffsetAgainstCollateralNetOfNotSubjectToMasterNettingArrangementPolicyElection100.0100.0100.0100.0100.0100.0100.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DerivativeAssetNotOffsetPolicyElectionDeduction

us-gaap:DerivativeAssetNotOffsetPolicyElectionDeduction


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312014-12-31
Value6215354360525690147100100856488118136158860.0080.07
Percentage of DerivativeAssetNotOffsetPolicyElectionDeduction100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DerivativeAssetsCurrent

us-gaap:DerivativeAssetsCurrent


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312011-12-31
Value211463551431146717581146776463857354109145281367347269380402413.6137.45214358233755
Percentage of DerivativeAssetsCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DerivativeAssetsCurrent us-gaap:HedgingDesignation

us-gaap:Nondesignated


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312011-12-31
Value211463551431146717581146776463857354109145281367347269380402413.6137.45214358233755
Percentage of DerivativeAssetsCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DerivativeAssetsNoncurrent

us-gaap:DerivativeAssetsNoncurrent


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312009-12-31
Value344420383027588.85331354060828467107113160120147131204189221.3133028288.5711622443031391012188.251
Percentage of DerivativeAssetsNoncurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DerivativeAssetsNoncurrent us-gaap:HedgingDesignation

us-gaap:Nondesignated


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312011-12-31
Value344420383027588.85331354060828467107113160120147131204189221.3133028288.5711631
Percentage of DerivativeAssetsNoncurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DerivativeCapPrice us-gaap:DerivativeInstrumentRisk

us-gaap:DerivativeCapPrice

sm:NYMEXOilCollarContractYear2


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-31
Value56.756.756.762.9563.6863.0
Percentage of DerivativeCapPrice100.0100.0100.0100.0100.0100.0

us-gaap:DerivativeFairValueOfDerivativeAsset

us-gaap:DerivativeFairValueOfDerivativeAsset


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302013-12-31
Value2455087518114494233901771121041231681581222162584424884944005855926352
Percentage of DerivativeFairValueOfDerivativeAsset100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

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

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


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-30
Value245508751811449423390177112104123168158122216258442488494400585592634.9132152718631546411398869439
Percentage of DerivativeFairValueOfDerivativeAsset100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.00.0100.00.00.00.00.00.00.00.00.00.00.0

us-gaap:DerivativeFairValueOfDerivativeLiability

us-gaap:DerivativeFairValueOfDerivativeLiability


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302013-12-31
Value621554438210875376326234243155106135213155168860.0084.9199.133-0.398-0.07-12.892-31.02
Percentage of DerivativeFairValueOfDerivativeLiability100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

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

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


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-30
Value-62.278-15.479-54.29438210875376326234243155106135213155168860.0084.9199.1330.3980.07121446831296.27335152810765524108
Percentage of DerivativeFairValueOfDerivativeLiability-100.0-100.0-100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0-100.0-100.0-100.00.00.0-100.00.00.00.00.00.00.00.00.00.00.0

us-gaap:DerivativeFairValueOfDerivativeNet

us-gaap:DerivativeFairValueOfDerivativeNet


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312014-12-312013-12-31
Value1834932113761-13.8158-286.7-149.4-122.4-139.4-31.76123-91.708619035548859221
Percentage of DerivativeFairValueOfDerivativeNet100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DerivativeLiabilitiesCurrent

us-gaap:DerivativeLiabilitiesCurrent


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312011-12-31
Value388.277503770956230425918117287365311551638.2110.0082.98.1070.04.649926026224.748228.99942
Percentage of DerivativeLiabilitiesCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DerivativeLiabilitiesCurrent us-gaap:HedgingDesignation

us-gaap:Nondesignated


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312011-12-31
Value388.277503770956230425918117287365311551638.2110.0082.98.1070.00.04.649926026224.748228.99942
Percentage of DerivativeLiabilitiesCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DerivativeLiabilitiesNoncurrent

us-gaap:DerivativeLiabilitiesNoncurrent


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312009-12-31
Value247.2023.4446.0141213127267537167698198104104780.02.0191.0260.3980.078.243527.8854.646.8731.525126.6458.8020.95625123.18438643265
Percentage of DerivativeLiabilitiesNoncurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DerivativeLiabilitiesNoncurrent us-gaap:HedgingDesignation

us-gaap:Nondesignated


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312011-12-31
Value247.2023.4446.0141213127267537167698198104104780.02.0191.0260.3980.078.243527.8854.646.8731.525126.64512
Percentage of DerivativeLiabilitiesNoncurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DerivativeLiabilityFairValueOffsetAgainstCollateralNetOfNotSubjectToMasterNettingArrangementPolicyElection

us-gaap:DerivativeLiabilityFairValueOffsetAgainstCollateralNetOfNotSubjectToMasterNettingArrangementPolicyElection


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312014-12-31
Value0.00.0190.02255192861791341437041469519-9.1970.00.00.0
Percentage of DerivativeLiabilityFairValueOffsetAgainstCollateralNetOfNotSubjectToMasterNettingArrangementPolicyElection0.00.0100.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.00.00.0

us-gaap:DerivativeLiabilityNotOffsetPolicyElectionDeduction

us-gaap:DerivativeLiabilityNotOffsetPolicyElectionDeduction


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312014-12-31
Value6215354360525690147100100856488118136158860.0080.07
Percentage of DerivativeLiabilityNotOffsetPolicyElectionDeduction100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DisposalGroupIncludingDiscontinuedOperationPropertyPlantAndEquipment

us-gaap:DisposalGroupIncludingDiscontinuedOperationPropertyPlantAndEquipment


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302017-12-31
Value0.00.00.00.00.00.05.285.04111
Percentage of DisposalGroupIncludingDiscontinuedOperationPropertyPlantAndEquipment0.00.00.00.00.00.0100.0100.0100.0

us-gaap:EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized us-gaap:AwardType

us-gaap:EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized

us-gaap:PerformanceShares


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-31
Value10.01215191315192212151822101415181215182113181924111418229.81419
Percentage of EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:RestrictedStockUnitsRSU


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-31
Value1013162113162024121619229.81214171215192214192226121519227.71114
Percentage of EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized108.0105.4106.3108.6105.4103.1105.3105.2103.2103.8102.7103.692.590.890.694.297.6101.3104.9106.6110.0106.6113.6108.1113.3106.7102.7100.078.674.873.5

us-gaap:LettersOfCreditOutstandingAmount us-gaap:CreditFacility, us-gaap:LongtermDebtType

us-gaap:LettersOfCreditOutstandingAmount

us-gaap:RevolvingCreditFacility, us-gaap:LineOfCredit


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-31
Value420.00.00.00.00.00.20.20.20.20.20.20.20.20.20.20.20.20.2
Percentage of LettersOfCreditOutstandingAmount100.00.00.00.00.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:LettersOfCreditOutstandingAmount us-gaap:CreditFacility, us-gaap:LongtermDebtType, us-gaap:SubsequentEventType

us-gaap:RevolvingCreditFacility, us-gaap:LineOfCredit, us-gaap:SubsequentEvent


None
Period End2020-07-232020-04-292020-02-062019-10-242019-07-232019-04-252019-02-072018-10-242018-07-252018-04-252018-02-142017-10-262017-07-262017-04-262017-02-152016-10-262016-07-272016-04-27
Value420.00.00.00.00.00.00.20.20.20.20.20.20.20.20.20.20.2
Percentage of LettersOfCreditOutstandingAmount0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:LineOfCreditFacilityCurrentBorrowingCapacity us-gaap:CreditFacility, us-gaap:LongtermDebtType, us-gaap:SubsequentEventType

us-gaap:LineOfCreditFacilityCurrentBorrowingCapacity

sm:SecondLienFacility, us-gaap:LineOfCredit, us-gaap:SubsequentEvent


None
Period End2020-04-29
Value900
Percentage of LineOfCreditFacilityCurrentBorrowingCapacity100.0

us-gaap:RevolvingCreditFacility, us-gaap:LineOfCredit, us-gaap:SubsequentEvent


None
Period End2020-04-292019-04-182018-04-252018-02-142017-10-262017-07-262017-04-262017-02-152016-10-042016-04-08
Value110016001400925925925925116512501250
Percentage of LineOfCreditFacilityCurrentBorrowingCapacity122.20.00.00.00.00.00.00.00.00.0

us-gaap:LineOfCreditFacilityRemainingBorrowingCapacity us-gaap:CreditFacility, us-gaap:LongtermDebtType

us-gaap:LineOfCreditFacilityRemainingBorrowingCapacity

us-gaap:RevolvingCreditFacility, us-gaap:LineOfCredit


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-31
Value86511281077107110829539999999999249249249249241164110691912061297
Percentage of LineOfCreditFacilityRemainingBorrowingCapacity100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:LineOfCreditFacilityRemainingBorrowingCapacity us-gaap:CreditFacility, us-gaap:LongtermDebtType, us-gaap:SubsequentEventType

us-gaap:RevolvingCreditFacility, us-gaap:LineOfCredit, us-gaap:SubsequentEvent


None
Period End2020-07-232020-04-292020-02-062019-10-242019-07-232019-04-252019-02-072018-10-242018-07-252018-04-252018-02-142017-10-262017-07-262017-04-262017-02-152016-10-262016-07-272016-04-27
Value87810061086105710741160100099999999992492492492410611249919955
Percentage of LineOfCreditFacilityRemainingBorrowingCapacity0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:LongTermDebtFairValue us-gaap:DebtInstrument

us-gaap:LongTermDebtFairValue

sm:A1.50SeniorConvertibleNotesDue2021


None
Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-31
Value69164156160163158
Percentage of LongTermDebtFairValue100.0100.0100.0100.0100.0100.0

sm:A100SeniorSecuredNotesDue2025


None
Period End2020-06-302019-12-31
Value4240.0
Percentage of LongTermDebtFairValue0.00.0

sm:A150SeniorSecuredConvertibleNotesDue2021


None
Period End2020-06-302019-12-31
Value600.0
Percentage of LongTermDebtFairValue0.00.0

sm:A150SeniorUnsecuredConvertibleNotesDue2021


None
Period End2020-06-302019-12-31
Value0.0164
Percentage of LongTermDebtFairValue0.0100.0

sm:A5.625SeniorNotesDue2025


None
Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312017-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302014-12-31
Value1454754314554644364944704333473264304930.0
Percentage of LongTermDebtFairValue208.4289.4275.3284.2285.1275.20.00.00.00.00.00.00.00.0

sm:A50SeniorUnsecuredNotesDue2024


None
Period End2020-06-302019-12-31
Value190479
Percentage of LongTermDebtFairValue0.0291.8

sm:A5625SeniorUnsecuredNotesDue2025


None
Period End2020-06-302019-12-31
Value185475
Percentage of LongTermDebtFairValue0.0289.4

sm:A5SeniorNotesDue2024


None
Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312017-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302012-12-31
Value1484794484644644394834724263443344234714724354925024884754614730.0
Percentage of LongTermDebtFairValue213.8291.8286.5289.5285.1276.90.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

sm:A6.125SeniorNotesDue2022


None
Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312017-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312013-12-31
Value1904814594724774525715675164104405526216015560.0
Percentage of LongTermDebtFairValue274.2292.9293.1295.0293.2285.20.00.00.00.00.00.00.00.00.00.0

sm:A6.625SeniorNotesDue2027


None
Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312017-12-31
Value1494934324634764420.0
Percentage of LongTermDebtFairValue214.5300.3276.0289.3292.1279.00.0

sm:A6.75SeniorNotesDue2026


None
Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312017-12-31
Value150494440470481448516
Percentage of LongTermDebtFairValue215.6301.0280.8293.1295.6282.60.0

sm:A6125SeniorUnsecuredNotesDue2022


None
Period End2020-06-302019-12-31
Value214481
Percentage of LongTermDebtFairValue0.0292.9

sm:A6625SeniorUnsecuredNotesDue2027


None
Period End2020-06-302019-12-31
Value206493
Percentage of LongTermDebtFairValue0.0300.3

sm:A675SeniorUnsecuredNotesDue2026


None
Period End2020-06-302019-12-31
Value213494
Percentage of LongTermDebtFairValue0.0301.0

us-gaap:LongTermLineOfCredit

us-gaap:LongTermLineOfCredit


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312014-12-312012-09-302012-06-302012-03-312011-12-312011-09-302010-12-312009-12-31
Value19372122129118460.00.00.00.00.00.00.00.00.00.033029320216622861240.00.048188
Percentage of LongTermLineOfCredit100.0100.0100.0100.0100.0100.00.00.00.00.00.00.00.00.00.00.0100.0100.0100.0100.0100.0100.0100.00.00.0100.0100.0

us-gaap:LongTermLineOfCredit us-gaap:CreditFacility, us-gaap:LongtermDebtType

us-gaap:RevolvingCreditFacility, us-gaap:LineOfCredit


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302015-12-31
Value19372122129118460.00.00.00.00.00.00.00.00.00.0330202
Percentage of LongTermLineOfCredit100.0100.0100.0100.0100.0100.00.00.00.00.00.00.00.00.00.00.0100.0100.0

us-gaap:LongTermLineOfCredit us-gaap:CreditFacility, us-gaap:LongtermDebtType, us-gaap:SubsequentEventType

us-gaap:RevolvingCreditFacility, us-gaap:LineOfCredit, us-gaap:SubsequentEvent


None
Period End2020-07-232020-04-292020-02-062019-10-242019-07-232019-04-252019-02-072018-10-242018-07-252018-04-252018-02-142017-10-262017-07-262017-04-262016-10-26
Value18093113143126400.00.00.00.00.00.00.00.00.0
Percentage of LongTermLineOfCredit0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:OilAndGasPropertySuccessfulEffortMethodAccumulatedDepreciationDepletionAndAmortization

us-gaap:OilAndGasPropertySuccessfulEffortMethodAccumulatedDepreciationDepletionAndAmortization


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312009-12-31
Value4536438941773953377435863417324030412893317132433117258928362668360633853481324030732865323330452883272225832418273725642376219020341888176616351532142713261053
Percentage of OilAndGasPropertySuccessfulEffortMethodAccumulatedDepreciationDepletionAndAmortization100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:PropertyPlantAndEquipmentFairValueDisclosure us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FairValueByMeasurementFrequency

us-gaap:PropertyPlantAndEquipmentFairValueDisclosure

us-gaap:FairValueInputsLevel3, us-gaap:FairValueMeasurementsNonrecurring


None
Period End2020-03-312018-03-312016-12-31
Value38019288
Percentage of PropertyPlantAndEquipmentFairValueDisclosure100.0100.0100.0

us-gaap:PropertyPlantAndEquipmentOtherAccumulatedDepreciation

us-gaap:PropertyPlantAndEquipmentOtherAccumulatedDepreciation


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312014-12-31
Value65646464625957565352495044424138343237
Percentage of PropertyPlantAndEquipmentOtherAccumulatedDepreciation100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:PropertyPlantAndEquipmentOtherNet

us-gaap:PropertyPlantAndEquipmentOtherNet


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302010-12-31
Value3736727981868810210211210610610811013713714614415335935434433427625824321820317615615313512010671476121
Percentage of PropertyPlantAndEquipmentOtherNet100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ProvedOilAndGasPropertySuccessfulEffortMethod

us-gaap:ProvedOilAndGasPropertySuccessfulEffortMethod


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312009-12-31
Value8134804389348143797475787278668663725824613959385631480357005406724969947606746873567006734867896151587556375414592256705401519748694657437840703799355333892797
Percentage of ProvedOilAndGasPropertySuccessfulEffortMethod100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:RestrictedCashNoncurrent

us-gaap:RestrictedCashNoncurrent


None
Period End2020-06-302019-09-302019-06-302018-09-30
Value03501000.06398000.00
Percentage of RestrictedCashNoncurrent0.0100.0100.00.0

us-gaap:SeniorLongTermNotes

us-gaap:SeniorLongTermNotes


None
Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312014-12-312011-09-302010-12-31
Value24132453245124502449244824472429277027692768276727652766276522722271231521663500.0
Percentage of SeniorLongTermNotes100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0

us-gaap:SeniorLongTermNotes us-gaap:DebtInstrument

sm:A100SeniorSecuredNotesDue2025


None
Period End2020-06-30
Value393
Percentage of SeniorLongTermNotes0.0

sm:A150SeniorSecuredConvertibleNotesDue2021


None
Period End2020-06-30
Value61
Percentage of SeniorLongTermNotes0.0

sm:A150SeniorUnsecuredConvertibleNotesDue2021


None
Period End2020-06-302019-12-31
Value0.0157
Percentage of SeniorLongTermNotes0.06.4

sm:A5.625SeniorNotesDue2025


None
Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312014-12-31
Value4954954944944944944934934934924924924924914914910.0
Percentage of SeniorLongTermNotes20.520.220.220.220.220.217.817.817.817.817.817.817.821.621.621.20.0

sm:A50SeniorUnsecuredNotesDue2024


None
Period End2020-06-302019-12-31
Value342496
Percentage of SeniorLongTermNotes0.020.2

sm:A5625SeniorUnsecuredNotesDue2025


None
Period End2020-06-302019-12-31
Value346495
Percentage of SeniorLongTermNotes0.020.2

sm:A5SeniorNotesDue2024


None
Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312014-12-31
Value496496496495495495494494494493493493493493492492491
Percentage of SeniorLongTermNotes20.620.220.220.220.220.217.917.917.917.917.917.817.821.721.721.322.7

sm:A6.125SeniorNotesDue2022


None
Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312014-12-31
Value433473473473473472556555555555555554554554553591590
Percentage of SeniorLongTermNotes18.019.319.319.319.319.320.120.120.120.120.120.120.124.424.425.527.2

sm:A6.625SeniorNotesDue2027


None
Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312017-12-31
Value4934934934924924920.0
Percentage of SeniorLongTermNotes20.520.120.120.120.120.10.0

sm:A6.75SeniorNotesDue2026


None
Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-03-312017-12-312016-12-312015-12-31
Value4944944944944934934924924910.0
Percentage of SeniorLongTermNotes20.520.220.220.220.220.217.817.817.80.0

sm:A6125SeniorUnsecuredNotesDue2022


None
Period End2020-06-302019-12-31
Value292473
Percentage of SeniorLongTermNotes0.019.3

sm:A6625SeniorUnsecuredNotesDue2027


None
Period End2020-06-302019-12-31
Value411493
Percentage of SeniorLongTermNotes0.020.1

sm:A675SeniorUnsecuredNotesDue2026


None
Period End2020-06-302019-12-31
Value414494
Percentage of SeniorLongTermNotes0.020.2

sm:SeniorSecuredNotes


None
Period End2020-06-30
Value455
Percentage of SeniorLongTermNotes0.0

sm:SeniorUnsecuredNotes


None
Period End2020-06-302019-12-31
Value18072610
Percentage of SeniorLongTermNotes0.0106.4

us-gaap:SeniorNotes


None
Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302016-12-31
Value2413245324512450244924482447277227702769276827672766
Percentage of SeniorLongTermNotes100.0100.0100.0100.0100.0100.0100.0114.1100.0100.0100.0100.0100.0

us-gaap:UnamortizedDebtIssuanceExpense us-gaap:CreditFacility, us-gaap:LongtermDebtType

us-gaap:UnamortizedDebtIssuanceExpense

us-gaap:RevolvingCreditFacility, us-gaap:LineOfCredit


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312015-12-31
Value5.05.55.96.36.76.06.46.72.42.73.13.53.94.35.94.9
Percentage of UnamortizedDebtIssuanceExpense100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:UnamortizedDebtIssuanceExpense us-gaap:DebtInstrument

sm:A1.50SeniorConvertibleNotesDue2021


None
Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312016-12-31
Value1.1461.3761.6051.8352.0632.2932.5222.7512.983.214.131
Percentage of UnamortizedDebtIssuanceExpense20.823.325.527.434.435.837.6114.6110.4103.570.0

sm:A100SeniorSecuredNotesDue2025


None
Period End2020-06-30
Value11
Percentage of UnamortizedDebtIssuanceExpense231.9

sm:A150SeniorSecuredConvertibleNotesDue2021


None
Period End2020-06-30
Value0.349
Percentage of UnamortizedDebtIssuanceExpense7.0

sm:A150SeniorUnsecuredConvertibleNotesDue2021


None
Period End2020-06-302019-12-31
Value0.015
Percentage of UnamortizedDebtIssuanceExpense0.0258.3

sm:A5.625SeniorNotesDue2025


None
Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312014-12-31
Value4.6774.9035.135.3565.5825.8086.2616.4876.7146.947.1667.3937.6197.8458.0718.2988.5240.0
Percentage of UnamortizedDebtIssuanceExpense85.083.181.479.993.090.8260.9240.3216.6198.3183.7171.9129.10.00.00.0174.00.0

sm:A50SeniorUnsecuredNotesDue2024


None
Period End2020-06-302019-12-31
Value2.2783.766
Percentage of UnamortizedDebtIssuanceExpense45.663.8

sm:A5625SeniorUnsecuredNotesDue2025


None
Period End2020-06-302019-12-31
Value3.1084.903
Percentage of UnamortizedDebtIssuanceExpense62.283.1

sm:A5SeniorNotesDue2024


None
Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312014-12-31
Value3.5353.7663.9964.2274.4574.6885.1495.385.615.8416.0726.3026.5336.7636.9947.2247.4558.377
Percentage of UnamortizedDebtIssuanceExpense64.363.863.463.174.373.2214.5199.3181.0166.9155.7146.6110.70.00.00.0152.10.0

sm:A6.125SeniorNotesDue2022


None
Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312014-12-31
Value2.4422.923.173.423.6713.9215.2115.5055.86.0956.396.6846.9797.2747.5697.8638.7149.812
Percentage of UnamortizedDebtIssuanceExpense44.449.550.351.061.261.3217.1203.9187.1174.1163.8155.4118.30.00.00.0177.80.0

sm:A6.625SeniorNotesDue2027


None
Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312017-12-31
Value6.3686.6016.8347.0677.37.5330.0
Percentage of UnamortizedDebtIssuanceExpense115.8111.9108.5105.5121.7117.70.0

sm:A6.75SeniorNotesDue2026


None
Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-06-302018-03-312017-12-312016-12-312015-12-31
Value5.3625.5715.785.9896.1986.4076.8247.0337.2428.0780.0
Percentage of UnamortizedDebtIssuanceExpense97.594.491.789.4103.3100.1284.3260.5233.6136.90.0

sm:A6125SeniorUnsecuredNotesDue2022


None
Period End2020-06-302019-12-31
Value1.4942.92
Percentage of UnamortizedDebtIssuanceExpense29.949.5

sm:A6625SeniorUnsecuredNotesDue2027


None
Period End2020-06-302019-12-31
Value5.1146.601
Percentage of UnamortizedDebtIssuanceExpense102.3111.9

sm:A675SeniorUnsecuredNotesDue2026


None
Period End2020-06-302019-12-31
Value4.3215.571
Percentage of UnamortizedDebtIssuanceExpense86.494.4

sm:SeniorSecuredNotes


None
Period End2020-06-30
Value11
Percentage of UnamortizedDebtIssuanceExpense238.9

sm:SeniorUnsecuredNotes


None
Period End2020-06-302019-12-31
Value1638
Percentage of UnamortizedDebtIssuanceExpense326.3661.0

us-gaap:SeniorNotes


None
Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302016-12-31
Value22232426272829293031333437
Percentage of UnamortizedDebtIssuanceExpense407.0402.7395.4388.9453.5443.1440.41212.41126.41023.5944.2881.1627.4

us-gaap:UnprovedOilAndGasPropertySuccessfulEffortMethod

us-gaap:UnprovedOilAndGasPropertySuccessfulEffortMethod


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312009-12-31
Value9239721005143414451529158118921917198620472321241824832471177222231284381419512532536388287271263234173175160122130120107899294132
Percentage of UnprovedOilAndGasPropertySuccessfulEffortMethod100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Line plots across dimensions of each concept


us-gaap:RevenueFromContractWithCustomerIncludingAssessedTax
us-gaap:ProductOrService
(None,)
None
us-gaap:RevenueFromContractWithCustomerIncludingAssessedTax
us-gaap:StatementGeographical
(None,)
None
us-gaap:InterestExpenseDebt
us-gaap:DebtInstrument
(None,)
None
us-gaap:AllocatedShareBasedCompensationExpense
us-gaap:AwardType
(None,)
None
us-gaap:StockholdersEquity
us-gaap:StatementEquityComponents
(None,)
None
us-gaap:StockholdersEquity
us-gaap:StatementEquityComponents
(None,)
None