LUV


Line plots across dimensions of each concept
Tables

Table of contents



us-gaap:CommonStockValue

us-gaap:WeightedAverageNumberOfDilutedSharesOutstanding

us-gaap:WeightedAverageNumberOfSharesOutstandingBasic

us-gaap:EarningsPerShareBasic

us-gaap:EarningsPerShareDiluted

us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax
us-gaap:DeferredRevenueArrangementType
us-gaap:ProductOrService

us-gaap:OperatingCostsAndExpenses

us-gaap:OperatingIncomeLoss
us-gaap:DerivativeInstrumentRisk, us-gaap:DerivativeInstrumentsGainLossByHedgingRelationship, us-gaap:HedgingDesignation, us-gaap:IncomeStatementLocation
us-gaap:InterestExpenseDebt

us-gaap:OtherNonoperatingIncomeExpense
us-gaap:ReclassificationOutOfAccumulatedOtherComprehensiveIncome, luv:AccumulatedOtherComprehensiveIncomeLossNetOfTax

us-gaap:NonoperatingIncomeExpense

us-gaap:IncomeTaxExpenseBenefit
us-gaap:DerivativeInstrumentRisk, us-gaap:ReclassificationOutOfAccumulatedOtherComprehensiveIncome

us-gaap:ComprehensiveIncomeNetOfTax
us-gaap:StatementEquityComponents

us-gaap:NetIncomeLoss

us-gaap:Assets

us-gaap:LiabilitiesAndStockholdersEquity

us-gaap:StockholdersEquity
us-gaap:StatementEquityComponents

us-gaap:AssetsCurrent

us-gaap:CashAndCashEquivalentsAtCarryingValue

us-gaap:ShortTermInvestments

us-gaap:PrepaidExpenseAndOtherAssetsCurrent

us-gaap:PropertyPlantAndEquipmentGross

us-gaap:AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment

us-gaap:PropertyPlantAndEquipmentNet

us-gaap:Goodwill

us-gaap:IntangibleAssetsNetExcludingGoodwill

us-gaap:OtherAssetsNoncurrent

us-gaap:LiabilitiesCurrent

us-gaap:AccountsPayableCurrent

us-gaap:OtherAccruedLiabilitiesCurrent

us-gaap:TaxesPayableCurrent

us-gaap:PensionAndOtherPostretirementDefinedBenefitPlansLiabilitiesNoncurrent

us-gaap:OtherLiabilitiesNoncurrent

us-gaap:StockholdersEquity
us-gaap:StatementEquityComponents

us-gaap:CommonStockValue

us-gaap:RetainedEarningsAccumulatedDeficit

us-gaap:TreasuryStockValue

us-gaap:AccumulatedOtherComprehensiveIncomeLossNetOfTax

us-gaap:NetCashProvidedByUsedInOperatingActivities

us-gaap:NetCashProvidedByUsedInInvestingActivities

us-gaap:NetCashProvidedByUsedInFinancingActivities

us-gaap:NetCashProvidedByUsedInOperatingActivities

us-gaap:NetIncomeLoss

us-gaap:NetCashProvidedByUsedInInvestingActivities

us-gaap:NetCashProvidedByUsedInFinancingActivities

us-gaap:PaymentsOfDividends

us-gaap:PaymentsOfDividends

us-gaap:PaymentsForRepurchaseOfCommonStock

us-gaap:OperatingLeaseRightOfUseAsset

us-gaap:ProceedsFromSaleOfShortTermInvestments

luv:AirTrafficLiabilityCurrentPeriodSales

luv:AirTrafficLiabilityRevenueamountsinbeginningbalance

luv:AirTrafficLiabilityRevenuefromCurrentPeriodSales

luv:AssetsConstructedforOthersDuringPeriod

luv:OtherRevenueRecognizedFromPointsRedeemed

luv:PassengerRevenueRecognizedFromPointsRedeemed

luv:RevenueAmountsDeferredAssociatedWithPointsAwarded

luv:SupplierProceeds

us-gaap:AircraftMaintenanceMaterialsAndRepairs

us-gaap:CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect

us-gaap:CommonStockDividendsPerShareCashPaid

us-gaap:DepreciationAndAmortization

us-gaap:DerivativeCostOfHedge
us-gaap:DerivativeInstrumentRisk, us-gaap:DerivativeInstrumentsGainLossByHedgingRelationship, us-gaap:IncomeStatementLocation
us-gaap:DerivativeGainLossOnDerivativeNet
us-gaap:DerivativeInstrumentRisk, us-gaap:DerivativeInstrumentsGainLossByHedgingRelationship, us-gaap:IncomeStatementLocation
us-gaap:DerivativeInstrumentsGainLossReclassifiedFromAccumulatedOCIIntoIncomeEffectivePortionNet

us-gaap:DividendsCash
us-gaap:StatementEquityComponents

us-gaap:EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate
luv:FairValueAssetsAndLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliation
us-gaap:FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetPurchases
luv:FairValueAssetsAndLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliation
us-gaap:FairValueRecurringBasisUnobservableInputReconciliationAssetLiabilityGainLossOci

us-gaap:FuelCosts
us-gaap:ReclassificationOutOfAccumulatedOtherComprehensiveIncome, luv:AccumulatedOtherComprehensiveIncomeLossNetOfTax
us-gaap:DerivativeInstrumentRisk, us-gaap:DerivativeInstrumentsGainLossByHedgingRelationship, us-gaap:HedgingDesignation, us-gaap:IncomeStatementLocation
us-gaap:GainLossOnDerivativeInstrumentsNetPretax
us-gaap:IncomeStatementLocation

us-gaap:IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments

us-gaap:IncomeTaxesPaid

us-gaap:IncreaseDecreaseCashCollateralFromCounterparties

us-gaap:IncreaseDecreaseInAccountsAndOtherReceivables

us-gaap:IncreaseDecreaseInAccountsPayableAndAccruedLiabilities

us-gaap:IncreaseDecreaseInContractWithCustomerLiability

us-gaap:IncreaseDecreaseInDeferredIncomeTaxes

us-gaap:IncreaseDecreaseInOtherOperatingAssets

us-gaap:IncreaseDecreaseInOtherOperatingLiabilities

us-gaap:IncrementalCommonSharesAttributableToShareBasedPaymentArrangements

us-gaap:InterestCostsCapitalizedAdjustment

us-gaap:InterestCostsIncurred

us-gaap:InterestPaidNet

us-gaap:InvestmentIncomeInterest

us-gaap:LaborAndRelatedExpense

us-gaap:LandingFeesAndOtherRentals
us-gaap:DerivativeInstrumentRisk, us-gaap:DerivativeInstrumentsGainLossByHedgingRelationship, us-gaap:IncomeStatementLocation
us-gaap:LossOnDiscontinuationOfCashFlowHedgeDueToForecastedTransactionProbableOfNotOccurring
us-gaap:DerivativeInstrumentRisk, us-gaap:HedgingDesignation
us-gaap:StatementEquityComponents
us-gaap:OtherComprehensiveIncomeLossBeforeReclassificationsNetOfTax
us-gaap:DerivativeInstrumentRisk
us-gaap:OtherComprehensiveIncomeLossDerivativesQualifyingAsHedgesNetOfTax
us-gaap:DerivativeInstrumentRisk
us-gaap:OtherComprehensiveIncomeLossDerivativesQualifyingAsHedgesTax

us-gaap:OtherComprehensiveIncomeLossNetOfTax

us-gaap:OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent

us-gaap:OtherComprehensiveIncomeLossTaxPortionAttributableToParent1
us-gaap:DerivativeInstrumentRisk, us-gaap:DerivativeInstrumentsGainLossByHedgingRelationship
us-gaap:OtherComprehensiveIncomeUnrealizedGainLossOnDerivativesArisingDuringPeriodBeforeTax
us-gaap:DerivativeInstrumentsGainLossByHedgingRelationship

us-gaap:OtherCostAndExpenseOperating

us-gaap:OtherOperatingActivitiesCashFlowStatement

us-gaap:PaymentsToAcquireProductiveAssets

us-gaap:PaymentsToAcquireShortTermInvestments

us-gaap:ProceedsFromIssuanceOfDebt

us-gaap:ProceedsFromLinesOfCredit

us-gaap:ProceedsFromNotesPayable

us-gaap:ProceedsFromPaymentsForOtherFinancingActivities

us-gaap:ProceedsFromStockPlans
us-gaap:DerivativeInstrumentRisk, us-gaap:ReclassificationOutOfAccumulatedOtherComprehensiveIncome
us-gaap:ReclassificationFromAccumulatedOtherComprehensiveIncomeCurrentPeriodNetOfTax
us-gaap:StatementEquityComponents

us-gaap:RepaymentsOfLongTermDebtAndCapitalSecurities

us-gaap:RightOfUseAssetObtainedInExchangeForFinanceLeaseLiability

us-gaap:RightOfUseAssetObtainedInExchangeForOperatingLeaseLiability

us-gaap:StockIssuedDuringPeriodValueEmployeeStockPurchasePlan
us-gaap:StatementEquityComponents

us-gaap:StockIssuedDuringPeriodValueShareBasedCompensation
us-gaap:StatementEquityComponents

us-gaap:TreasuryStockValueAcquiredCostMethod
us-gaap:StatementEquityComponents

us-gaap:UnrealizedGainLossOnDerivatives
us-gaap:DebtInstrument, us-gaap:SubsequentEventType, luv:DebtDescription
luv:AccordianFeatureonShorttermDebt

luv:AccrualforPropertyandIncomeTaxes

luv:AirTrafficLiabilityLoyaltyProgram

luv:AirTrafficLiabilityPassengerRevenueandAncillaryPassengerServices

luv:AirTrafficLiabilityTotal

luv:AircraftMaintenancePayable

luv:AssetsConstructedForOthers
us-gaap:OtherCommitments
luv:AssetsConstructedForOthersNet

luv:BusinessPartnersAndOtherSuppliers

luv:ConstructionObligationNoncurrent

luv:DerivativeAssetFairValueAmountOffsetAgainstCollateralTotal
us-gaap:BalanceSheetLocation, us-gaap:DerivativeInstrumentRisk
us-gaap:BalanceSheetLocation, us-gaap:DerivativeInstrumentRisk
luv:DerivativeAssetFairValueGrossLiabilityOffset
us-gaap:BalanceSheetLocation, us-gaap:DerivativeInstrumentRisk
luv:DerivativeAssetNoncurrentCollateralObligationToReturnCashOffset
us-gaap:BalanceSheetLocation, us-gaap:DerivativeInstrumentRisk
luv:DerivativeLiabilityFairValueGrossAssetOffset
us-gaap:DerivativeInstrumentRisk, us-gaap:HedgingDesignation
luv:DiscontinuationofInterestRateCashFlowHedgeBalanceinAOCI

luv:FuelPayable
us-gaap:CounterpartyName, us-gaap:Range, us-gaap:DerivativeInstrumentRisk
luv:InvestmentGradeRatingFairValueOfFuelDerivativeLevelInWhichCashIsReceived
us-gaap:CounterpartyName, us-gaap:Range, us-gaap:DerivativeInstrumentRisk
luv:InvestmentGradeRatingFairValueOfFuelDerivativeLevelsInWhichCashIsProvidedThreshold1
us-gaap:DerivativeInstrumentRisk
luv:LettersofCreditCollateralPledgedAggregateFairValue
us-gaap:CreditFacility
luv:LineofCreditFacilityMaximumAmountOutstandingatPeriodEnd
us-gaap:CounterpartyName, us-gaap:Range, us-gaap:DerivativeInstrumentRisk
luv:NonInvestmentGradeRatingFairValueOfFuelDerivativeLevelsatWhichCashcollateralIsPledged

luv:ResidualTravelFunds
us-gaap:SubsequentEventType
luv:TotalExpectedReceiptsofReliefThroughPayrollSupportProgramofCARESAct

luv:TradeReceivables
us-gaap:SubsequentEventType
luv:UnsecuredTermLoanThroughPayrollSupportProgramofCARESAct

us-gaap:AccountsAndOtherReceivablesNetCurrent

us-gaap:AccountsPayableOtherCurrent

us-gaap:AccountsPayableTradeCurrent

us-gaap:AccruedEmployeeBenefitsCurrent

us-gaap:AccruedLiabilitiesCurrent

us-gaap:AccruedSalariesCurrent

us-gaap:AccruedVacationCurrent

us-gaap:AdditionalPaidInCapitalCommonStock

us-gaap:AirlineRelatedInventory
us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FairValueByMeasurementFrequency
us-gaap:AssetsFairValueDisclosure
us-gaap:FairValueByMeasurementBasis, us-gaap:FairValueByMeasurementFrequency
us-gaap:ClassOfWarrantOrRight, us-gaap:SubsequentEventType
us-gaap:ClassOfWarrantOrRightExercisePriceOfWarrantsOrRights1
us-gaap:CounterpartyName, us-gaap:DerivativeInstrumentRisk
us-gaap:CollateralAlreadyPostedAggregateFairValue
us-gaap:DerivativeInstrumentRisk

us-gaap:ContractWithCustomerLiabilityCurrent

us-gaap:ContractWithCustomerLiabilityNoncurrent

us-gaap:CreditCardReceivables

us-gaap:DeferredCompensationCashBasedArrangementsLiabilityCurrent

us-gaap:DeferredGainLossOnDiscontinuationOfInterestRateFairValueHedge

us-gaap:DeferredIncomeTaxLiabilitiesNet

us-gaap:DeferredRevenue

us-gaap:DepositsOnFlightEquipment
us-gaap:BalanceSheetLocation, us-gaap:HedgingDesignation
us-gaap:DerivativeAmountOfHedgedItem
us-gaap:BalanceSheetLocation, us-gaap:HedgingDesignation, luv:HedgeAdjustment
us-gaap:HedgingDesignation
us-gaap:HedgingDesignation, luv:HedgeAdjustment
us-gaap:BalanceSheetLocation, us-gaap:DerivativeInstrumentRisk
us-gaap:DerivativeAssetCollateralObligationToReturnCashOffset
us-gaap:BalanceSheetLocation, us-gaap:DerivativeInstrumentRisk, us-gaap:HedgingDesignation
us-gaap:DerivativeAssetFairValueGrossLiability
us-gaap:BalanceSheetLocation, us-gaap:DerivativeInstrumentRisk
us-gaap:DerivativeAssetNotSubjectToMasterNettingArrangement
us-gaap:BalanceSheetLocation, us-gaap:DerivativeInstrumentRisk
us-gaap:DerivativeFairValueAmountOffsetAgainstCollateralNet
us-gaap:CounterpartyName, us-gaap:DerivativeInstrumentRisk
us-gaap:DerivativeFairValueOfDerivativeAssetAmountNotOffsetAgainstCollateral
us-gaap:DerivativeInstrumentRisk
us-gaap:BalanceSheetLocation, us-gaap:DerivativeInstrumentRisk
us-gaap:DerivativeFairValueOfDerivativeLiabilityAmountOffsetAgainstCollateral
us-gaap:BalanceSheetLocation, us-gaap:DerivativeInstrumentRisk
us-gaap:DerivativeLiabilityNotSubjectToMasterNettingArrangement
luv:VolumeOfFuelHedging
us-gaap:DerivativeNonmonetaryNotionalAmount

us-gaap:DividendsPayableCurrentAndNoncurrent
luv:FairValueAssetsAndLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliation
us-gaap:FairValueMeasurementWithUnobservableInputsReconciliationsRecurringBasisLiabilityValue
us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FairValueByMeasurementFrequency
us-gaap:FinancialInstrumentsOwnedUSGovernmentAndAgencyObligationsAtFairValue
us-gaap:FairValueByMeasurementBasis, us-gaap:FairValueByMeasurementFrequency

us-gaap:FlightEquipmentGross

us-gaap:IncomeTaxesReceivable
us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FairValueByMeasurementFrequency
us-gaap:InterestRateDerivativeAssetsAtFairValue
us-gaap:FairValueByMeasurementBasis, us-gaap:FairValueByMeasurementFrequency
us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FairValueByMeasurementFrequency
us-gaap:InterestRateDerivativeLiabilitiesAtFairValue
us-gaap:FairValueByMeasurementBasis, us-gaap:FairValueByMeasurementFrequency
us-gaap:DebtInstrument, us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:LongtermDebtType
us-gaap:LoansPayableFairValueDisclosure

us-gaap:LongTermDebtAndCapitalLeaseObligations

us-gaap:LongTermDebtAndCapitalLeaseObligationsCurrent
us-gaap:DebtInstrument, us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:LongtermDebtType
us-gaap:NotesPayableFairValueDisclosure

us-gaap:OperatingLeaseLiabilityCurrent

us-gaap:OperatingLeaseLiabilityNoncurrent

us-gaap:OtherAssets
us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FairValueByMeasurementFrequency
us-gaap:OtherAssetsFairValueDisclosure
us-gaap:FairValueByMeasurementBasis, us-gaap:FairValueByMeasurementFrequency

us-gaap:OtherAssetsMiscellaneous

us-gaap:OtherDeferredCompensationArrangementsLiabilityClassifiedNoncurrent

us-gaap:OtherReceivablesNetCurrent

us-gaap:OtherSundryLiabilitiesNoncurrent

us-gaap:PropertyPlantAndEquipmentOther
us-gaap:DebtInstrument
us-gaap:ShortTermBorrowings
us-gaap:DebtInstrument, us-gaap:ShortTermDebtType
us-gaap:DebtInstrument, us-gaap:SubsequentEventType
us-gaap:DebtInstrument, us-gaap:SubsequentEventType, luv:DebtDescription
us-gaap:StatementEquityComponents
us-gaap:StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest

us-gaap:WorkersCompensationLiabilityCurrent

Tables

  2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312009-09-302009-06-302009-03-31
us-gaap:CommonStockValue ██████████████████████████████████▁▁██80880880880880880880880880880880880880880880880880880880880880880880880880880880880880880880880880880800808808NA808808808NANANA
us-gaap:WeightedAverageNumberOfDilutedSharesOutstanding 515NA534542552NA569579588NA598605614NA625639648NA663673682NA691698707NA711722727NA740764772NA00749NA0746744NANA741740
us-gaap:WeightedAverageNumberOfSharesOutstandingBasic 515NA533542551NA569578587NA597604613NA618632641NA655665674NA683690698NA703714725NA739757771NA00748NA0745743NANA741740
us-gaap:EarningsPerShareBasic ▁▃▄▄▃▄▄▄▃█▃▄▃▃▃▄▃▃▃▃▃▂▂▃▂▂▂▂▂▂▁▂▂▂▁▂▁▂▂▂▁▂▁▂▁-0.180.981.241.370.71.171.081.270.793.190.841.240.570.850.631.30.80.830.890.910.670.280.480.670.220.30.370.310.080.110.020.30.130.2-0.180.210.010.180.270.150.010.16-0.020.12-0.12
us-gaap:EarningsPerShareDiluted ▁▃▄▄▃▄▄▄▃█▃▄▃▃▃▄▃▃▃▃▃▂▂▃▂▂▂▂▂▂▁▂▂▂▁▂▁▂▂▂▁▂▁▂▁-0.180.981.231.370.71.171.081.270.793.180.841.230.570.840.621.280.790.820.880.90.660.280.480.670.220.30.370.310.080.110.020.30.130.2-0.180.210.010.180.270.150.010.16-0.020.12-0.12
  2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312009-09-302009-06-302009-03-31
us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax ▆███▇███▇▇▇█▇▇▇▇▇▇▇▇▆▆▇▇▆▆▆▇▆▆▆▆▆▆▁▁▅▅▅▅▄▄▄▄▄423457295639590951495704557557424944527453035744488350765139538448264977531851114414462848005011416644284545464340844173430946163991410800310331143192316826302712266626162357
 us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:ProductOrService luv:PassengerLoyaltyAirTransportation▁█▇▆▃▆▆▅▂▄▆461673657622535605623588491539616NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
 us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:ProductOrService luv:PassengerRevenueNonLoyalty▁▇▇█▅▇▇█▄▆▆32204452440046834043453744174605394842014182NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
 us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:ProductOrService us-gaap:Passenger▁▇▇█▅▇▇▇▄▅▆38455314523054874745531851945358458548944944NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:OperatingCostsAndExpenses 4344NANANA4644NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:OperatingIncomeLoss ▁▅▆▆▄▆▆▆▅▅▆█▅▆▅█▆▇█▇▅▅▅▅▃▄▄▄▂▂▂▄▂▂▂▂▂▃▃▃▂▂▂▂▁-1106658199685058207989726167738341250658846695127694410261225108578062161477521538639043370915146022147001142163553635416722123-50
 us-gaap:InterestExpenseDebt us-gaap:DerivativeInstrumentRisk,us-gaap:DerivativeInstrumentsGainLossByHedgingRelationship,us-gaap:HedgingDesignation,us-gaap:IncomeStatementLocation us-gaap:InterestRateSwap,us-gaap:FairValueHedging,us-gaap:DesignatedAsHedgingInstrument,us-gaap:GainLossOnDerivativeInstruments0.0NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
 us-gaap:InterestExpenseDebt us-gaap:DerivativeInstrumentRisk,us-gaap:DerivativeInstrumentsGainLossByHedgingRelationship,us-gaap:HedgingDesignation,us-gaap:IncomeStatementLocation us-gaap:InterestRateSwap,us-gaap:FairValueHedging,us-gaap:DesignatedAsHedgingInstrument,us-gaap:InterestExpense▁▄███████████4566666666666NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:OtherNonoperatingIncomeExpense ▆▇▇▇▇▇▇▇▇▆▆▅▅▆▆█▅▄▁▅▆▁▆▇█-280-3-2-2-2-8-4-4-27-39-74-94-27-6443-114-162-272-88-32-293-66-353NA59-47466210-62170-19700591060146-4NANA-23-23
 us-gaap:OtherNonoperatingIncomeExpense us-gaap:ReclassificationOutOfAccumulatedOtherComprehensiveIncome,luv:AccumulatedOtherComprehensiveIncomeLossNetOfTax us-gaap:ReclassificationOutOfAccumulatedOtherComprehensiveIncome,us-gaap:CommodityContract2NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:NonoperatingIncomeExpense ▇▇▇▇▇▇▇▇▇▇▇▆▅▇▆█▅▄▂▅▆▁▆▇█-34100-1-3-12-12-14-35-43-80-105-36-7728-128-179-292-108-57-319-89-2929NA29-702434-18-92137-36900-96-24200NANANANANA
us-gaap:IncomeTaxExpenseBenefit ▆▇▇▇▆▇▇▇▇▁▇█▇▇▇█▇▇▇█▇▆▇▇▆-50153160227117163171227139-115028842420228723048430531134936927011119628192NA1601393547171406114400132850726NANA16-16
 us-gaap:IncomeTaxExpenseBenefit us-gaap:DerivativeInstrumentRisk,us-gaap:ReclassificationOutOfAccumulatedOtherComprehensiveIncome us-gaap:CommodityContract,us-gaap:ReclassificationOutOfAccumulatedOtherComprehensiveIncome-5NA-40-3NA5NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:ComprehensiveIncomeNetOfTax ▂▄▄▄▄▃▄▅▄█▄▅▃▄▄▅▄▃▃▄▄▁▃▄▃-21951556667546326272995354720366307953626985171086668388345686449-456126588143NA393876784211-35265216003467740-1171NANA216NA
us-gaap:NetIncomeLoss ▁▃▄▄▃▄▄▄▃█▃▄▃▃▃▄▃▃▃▃▃▂▂▃▂▂▂▂▂▂▁▂▂▂▁▁▁▂▂▂▁▂▁▂▁-9451465974138765461573346318885037463515223888205115365846084531903294651522122592245978162289815200513120511211116-1691-91
  2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312009-09-302009-06-302009-03-31
us-gaap:Assets ██████████▇▇▇▇▇▇▇▇▇▆▇▆▆▆▆▆▆▆▆▆▆▆▆▆▁▁▅▅26885258952646726374264592624326882264652550325110242492392123763232862304522447222412131221159210752116320200205392089119976193451936419382191971859618813185161882618068001641415463NA149871453014269NANANA
us-gaap:LiabilitiesAndStockholdersEquity ██████████▇▇▇▇▇▇▇▇▇▆▇▆▆▆▆▆▆▆▆▆▆▆▆▆▁▁▅▅26885258952646726374264592624326882264652550325110242492392123763232862304522447222412131221159210752116320200205392089119976193451936419382191971859618813185161882618068001641415463NA149871453014269NANANA
us-gaap:StockholdersEquity ▇███████▇█▇▇▇▇▆▆▆▆▆▆▆▆▆▆▆▆▆▆▆▆▆▆▆▆▁▁▅▅9075983299319940979198531015399979619104308800853082048441804778217496735869687158690267757429751671907336701367816961699270026840709768770065876237NA554855365466NANANA
 us-gaap:StockholdersEquity us-gaap:StatementEquityComponents us-gaap:AdditionalPaidInCapital██▇▅▄▄▃▂▁▁1582158115541534151315101485146914521451NANANA1410NANANA1374NANANA1315NANANA1231NANANA1210NANANA1222NANANA1183NANANA1216NANANA
 us-gaap:StockholdersEquity us-gaap:StatementEquityComponents us-gaap:RetainedEarnings██▇▆▅▄▃▂▁▂17757179451752516962163201596715402148781423814621NANANA11418NANANA9409NANANA7416NANANA6431NANANA5768NANANA5395NANANA5399NANANA4983NANANA
  2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312009-09-302009-06-302009-03-31
us-gaap:AssetsCurrent █▇▇▇▆▆▇▆▆▆▅▅▆▅▆▅▆▅▆▆▆▅▆▆▆▅▆▆▅▅▆▆▆▅▁▁▆▅70285974565055545483502856015408480148154280434346584498483944694574402445734596496344044985531748144456477348644514422746524691512043450053294279NA397136213358NANANA
us-gaap:CashAndCashEquivalentsAtCarryingValue █▆▅▅▅▄▅▅▄▄▄▄▄▄▄▅▅▄▄▄▅▃▄▄▄▃▃▄▃▃▃▃▄▂▁▁▅▃▁▃▃▃3940254824882446234418542104211418221495146015371851168019662040238815831740177220251282183218821741135513331489133811131168108315588290020391261098911101114NA9461145
us-gaap:ShortTermInvestments ▆▅▅▅▅▆▆▆▅▆▆▆▆▆▅▅▄▅▅▅▅▆▆▇▆▆▇▆▆▆▇▇▇█▁▁██16051524152815401517183517161572142117781580161516311625148013751194146813561360141317061728211217571797199519041797185720672173222623150024262277NA213516631479NANANA
us-gaap:PrepaidExpenseAndOtherAssetsCurrent ▄▅▄▅▆▅██▇▇▄▄▄▅▄▄▄▄▄▄▅▄▅▅▄▄▄▄▄▄▄▄▅▄▁▁▅▂2562872392813543105144984484602232502353102142021921882392552702322912762412502282092152102242033182380026289NANANANANANANA
  2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312009-09-302009-06-302009-03-31
us-gaap:PropertyPlantAndEquipmentGross ████████████▇▇▇▇▇▇▇▇▇▆▆▆▆▆▆▆▆▆▆▆▅▅▁▁▅▅27901277132828727897276482925628716282322816928229278012720226783264642584125658252312468523825235232306222513220562158721063208202043820223199911949719294189421855118421001641516343NA161821602315888NANANA
us-gaap:AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment ████▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▆▆▆▆▆▆▆▆▅▅▅▅▅▅▁▁▅▅109121068810445101649875973194379166939696909645952394979420929593649267908488968663845582218091786076437431723570596861673167226600645662940059195765NA555554025254NANANA
us-gaap:PropertyPlantAndEquipmentNet ▇▇▇▇▇██████▇▇▇▇▇▇▇▆▆▆▆▆▆▆▆▆▆▆▆▆▅▅▅▁▁▅▅16989170251784217733177731952519279190661877318539181561767917286170441654616294159641560114929148601460714292139651372713420133891320313164131301276612572123421209512127001049610578NA106271062110634NANANA
us-gaap:Goodwill ██████████████████████████████████▁▁97097097097097097097097097097097097097097097097097097097097097097097097097097097097097097097097097097000NA0NANANANANANANA
us-gaap:IntangibleAssetsNetExcludingGoodwill ▄▄▄▄▄▆▆▆▆▇▇▇▇▇▇▇█████▅▅▆▆▁296296311312313400403406410413416419423426430434460464469474479363366369372166NANANANANANANANANANANANANANANANANANANA
us-gaap:OtherAssetsNoncurrent ▅▅▅▆▆▆███▆▇▇▇▆▆▆▆▆▆▅▅▅▅▇▆▅▄▄▅▅▅▄▅▅▁▁▅▅6205776536937257201032102195978684392984977469071473371768764962353461987777253041838458363361951364162600589606NA389288277NANANA
  2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312009-09-302009-06-302009-03-31
us-gaap:LiabilitiesCurrent █▇▇▇▇▆▆▆▆▆▆▆▆▆▆▆▇▆▆▆▆▅▅▆▅▅▅▅▅▄▄▄▄▄▁▁▄▃102418952862986118723790578437716716269056965709774586844781678338253740670846876690359236446702764415676554657795411465049695080504745330043583305NA333829182676NANANA
us-gaap:AccountsPayableCurrent ▆█▇▇▇▇▆▇▇▇▆▆▆▆▆▇▆▆▆▆▆▆▆▇▇▇▆▆▇▆▆▆▆▆▁▁104315741274133014121416122413381243132011241217121411781021124711531188123511341145120311851292129912471134123212501107114011531208105700NA0NANANANANANANA
us-gaap:OtherAccruedLiabilitiesCurrent ▄▆▅▆██▇▅▄▇▅▅▅▅▅▅▅▅▅▆▄▅▆▅▅▅▅▅▅▅▄▅▅▆▁▁▅▅18025524926038338833220015834622820520223721921020524621925819223625523321722320320219821219222721127800225211NA272NA187NANANA
us-gaap:TaxesPayableCurrent ▁▆▅▇█▆▅██▅▅▇█▅▄▆▇▅▄▆▆▄▃▆▆▃66227188269291220196277282203180266280184165239246179157234229163142214218146NANANA128NANANANANANANANANANANANANANANA
  2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312009-09-302009-06-302009-03-31
us-gaap:PensionAndOtherPostretirementDefinedBenefitPlansLiabilitiesNoncurrent ██▇▇▇▇█████▇▇▇▆▆▆▆▅▅▅▅▄▄▄▄▅▅▅▅▄▄▄▄▁▁29428824524023523229428828227527426726125621521120620117917617216914314414013816916215414811611210910700NA0NANANANANANANA
us-gaap:OtherLiabilitiesNoncurrent ▅▅▅▅▄▅▅▅▅▅▅▅▅▅▅▅▅▅▆▅▇█▅▅▅▅██▇▇▇▆▆▆▁▁▄▄694706644639608650748692706707713708703728661681703760931708109512556587107267711198121111531124111494592491000460465NA490423493NANANA
  2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312009-09-302009-06-302009-03-31
us-gaap:StockholdersEquity ▇███████▇█▇▇▇▇▆▆▆▆▆▆▆▆▆▆▆▆▆▆▆▆▆▆▆▆▁▁▅▅9075983299319940979198531015399979619104308800853082048441804778217496735869687158690267757429751671907336701367816961699270026840709768770065876237NA554855365466NANANA
 us-gaap:StockholdersEquity us-gaap:StatementEquityComponents us-gaap:AdditionalPaidInCapital██▇▅▄▄▃▂▁▁1582158115541534151315101485146914521451NANANA1410NANANA1374NANANA1315NANANA1231NANANA1210NANANA1222NANANA1183NANANA1216NANANA
 us-gaap:StockholdersEquity us-gaap:StatementEquityComponents us-gaap:RetainedEarnings██▇▆▅▄▃▂▁▂17757179451752516962163201596715402148781423814621NANANA11418NANANA9409NANANA7416NANANA6431NANANA5768NANANA5395NANANA5399NANANA4983NANANA
us-gaap:CommonStockValue ██████████████████████████████████▁▁██80880880880880880880880880880880880880880880880880880880880880880880880880880880880880880880880880880800808808NA808808808NANANA
us-gaap:RetainedEarningsAccumulatedDeficit ████▇▇▇▇▇▇▆▆▆▅▅▅▅▅▄▄▄▄▄▄▄▄▃▃▃▃▃▃▃▃▁▁▃▃177571794517525169621632015967154021487814238146211280612378117081141810957106319872940989228387782974167266697965556431624660155818576857005692548653950053995399NA507549734983NANANA
us-gaap:TreasuryStockValue ██▇▇▇▇▆▆▆▅▅▅▅▄▄▄▄▃▃▃▃▃▃▃▂▂▂▂▂▂▂▂▂▂▂▂▁▁1088610441989393948946845279547456695764626114581554194872462143733677318231892692232220261833164514171131113299576867560956436532400-885-891NA915945963NANANA
us-gaap:AccumulatedOtherComprehensiveIncomeLossNetOfTax ▅▆▆▆▆▆█▇▆▆▅▅▅▄▄▃▂▁▂▃▂▂▆▇▆▆▅▅▅▅▅▄▆▅▆▆▆▅-186-61-633096204122987812-136-263-312-323-499-628-894-1051-903-664-742-738-92111-12-3-114-248-111-119-125-320-57-2240079-262NA-641-518-578NANANA
  2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312009-09-302009-06-302009-03-31
us-gaap:NetCashProvidedByUsedInOperatingActivities ▁▅▆▆▆▆▇█▆▄▆▅█▅▅▆█▃▅▄▇▃▃▇▆-37782410919661105989127116311002563996746162570985611121616324836627145220424013381119NA428778983231464145122513840096515600540373NANA135286
us-gaap:NetCashProvidedByUsedInInvestingActivities ▇█▅▅█▃▃▃▇▂▃▃▄▂▃▃▆▁▅▄▅▄▇▂▅-5144-359-252164-668-604-694-73-735-620-584-470-839-584-674-175-946-259-407-302-468-44-857-358NA-359-300-472-189-277-355-12-105000-231-12640-610-322NANA-377-638
us-gaap:NetCashProvidedByUsedInFinancingActivities █▁▂▂▂▂▂▂▂▄▂▂▁▃▃▂▂▅▂▂▂▃▃▃▃1774-908-690-612-779-571-677-645-602207-453-476-984-156-346-786-636465-609-473-407-286-246-340-375NA-225-327-286-97-102-265-484-7650044-1480-51-55NANA43129
  2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312009-09-302009-06-302009-03-31
us-gaap:NetCashProvidedByUsedInOperatingActivities ▁▅▆▆▆▆▇█▆▄▆▅█▅▅▆█▃▅▄▇▃▃▇▆-37782410919661105989127116311002563996746162570985611121616324836627145220424013381119NA428778983231464145122513840096515600540373NANA135286
us-gaap:NetIncomeLoss ▁▃▄▄▃▄▄▄▃█▃▄▃▃▃▄▃▃▃▃▃▂▂▃▂▂▂▂▂▂▁▂▂▂▁▁▁▂▂▂▁▂▁▂▁-9451465974138765461573346318885037463515223888205115365846084531903294651522122592245978162289815200513120511211116-1691-91
  2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312009-09-302009-06-302009-03-31
us-gaap:NetCashProvidedByUsedInInvestingActivities ▇█▅▅█▃▃▃▇▂▃▃▄▂▃▃▆▁▅▄▅▄▇▂▅-5144-359-252164-668-604-694-73-735-620-584-470-839-584-674-175-946-259-407-302-468-44-857-358NA-359-300-472-189-277-355-12-105000-231-12640-610-322NANA-377-638
  2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312009-09-302009-06-302009-03-31
us-gaap:NetCashProvidedByUsedInFinancingActivities █▁▂▂▂▂▂▂▂▄▂▂▁▃▃▂▂▅▂▂▂▃▃▃▃1774-908-690-612-779-571-677-645-602207-453-476-984-156-346-786-636465-609-473-407-286-246-340-375NA-225-327-286-97-102-265-484-7650044-1480-51-55NANA43129
us-gaap:PaymentsOfDividends █▁▅▅█▁▄▄▇▁▄▄▆▁▃▃▅1880969817809193148075761230626396NA495081NANANANANANANANANANANANA1300-7-130-37NANA-37
us-gaap:PaymentsOfDividends █▁▅▅█▁▄▄▇▁▄▄▆▁▃▃▅1880969817809193148075761230626396NA495081NANANANANANANANANANANANA1300-7-130-37NANA-37
us-gaap:PaymentsForRepurchaseOfCommonStock ▆▆▆▆▆▆▆▆▆▄▄▅▆▄▄█▆▁▆▅▄▃▃▃▄4515505004505005005005005003503004005503002507005000500380300200200240315NA150251100755022550224000000NANANANANA
  2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312009-09-302009-06-302009-03-31

Common Stock Value

us-gaap:CommonStockValue



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-06-302010-03-312009-12-312008-12-31
Value80880880880880880880880880880880880880880880880880880880880880880880880880880880880880880880880880880800808808808808808808
Percentage of CommonStockValue100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets3.03.13.13.13.13.13.03.13.23.23.33.43.43.53.53.63.63.83.83.83.84.03.93.94.04.24.24.24.24.34.34.44.34.54.54.34.95.25.45.65.75.7

Common Stock Par Or Stated Value Per Share

Common Stock Shares Issued

Common Stock Shares Outstanding

Common Stock Shares Authorized

Weighted Average Number Of Diluted Shares Outstanding

us-gaap:WeightedAverageNumberOfDilutedSharesOutstanding



Period End2020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-312017-09-302017-06-302017-03-312016-09-302016-06-302016-03-312015-09-302015-06-302015-03-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-312012-09-302012-06-302012-03-312011-09-302011-06-302011-03-312010-09-302010-06-302010-03-312009-06-302009-03-31
Value515534542552569579588598605614625639648663673682691698707711722727740764772007490746744741740
Percentage of WeightedAverageNumberOfDilutedSharesOutstanding100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Weighted Average Number Of Shares Outstanding Basic

us-gaap:WeightedAverageNumberOfSharesOutstandingBasic



Period End2020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-312017-09-302017-06-302017-03-312016-09-302016-06-302016-03-312015-09-302015-06-302015-03-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-312012-09-302012-06-302012-03-312011-09-302011-06-302011-03-312010-09-302010-06-302010-03-312009-06-302009-03-31
Value515533542551569578587597604613618632641655665674683690698703714725739757771007480745743741740
Percentage of WeightedAverageNumberOfSharesOutstandingBasic100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Earnings Per Share Basic

us-gaap:EarningsPerShareBasic



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312009-09-302009-06-302009-03-31
Value-0.180.981.241.370.71.171.081.270.793.190.841.240.570.850.631.30.80.830.890.910.670.280.480.670.220.30.370.310.080.110.020.30.130.2-0.180.210.010.180.270.150.010.16-0.020.12-0.12
Percentage of EarningsPerShareBasic100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Earnings Per Share Diluted

us-gaap:EarningsPerShareDiluted



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312009-09-302009-06-302009-03-31
Value-0.180.981.231.370.71.171.081.270.793.180.841.230.570.840.621.280.790.820.880.90.660.280.480.670.220.30.370.310.080.110.020.30.130.2-0.180.210.010.180.270.150.010.16-0.020.12-0.12
Percentage of EarningsPerShareDiluted100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Revenue From Contract With Customer Excluding Assessed Tax

us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312009-09-302009-06-302009-03-31
Value423457295639590951495704557557424944527453035744488350765139538448264977531851114414462848005011416644284545464340844173430946163991410800310331143192316826302712266626162357
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DeferredRevenueArrangementType

luv:ChaseAndOtherPartnerAgreements



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-30
Value321316329336319244290292271233273
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax7.65.55.85.76.24.35.25.15.54.45.1
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax7.65.55.85.76.24.35.25.15.54.45.1
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax luv:ChaseAndOtherPartnerAgreements100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ProductOrService

luv:PassengerAncillarySoldSeparately



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-30
Value164189173182167176154165146154146
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax3.93.33.13.13.23.12.82.93.02.92.8
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax3.93.33.13.13.23.12.82.93.02.92.8
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax luv:PassengerAncillarySoldSeparately100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

luv:PassengerLoyaltyAirTransportation



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-30
Value461673657622535605623588491539616
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax10.911.711.710.510.410.611.210.29.910.211.6
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax10.911.711.710.510.410.611.210.29.910.211.6
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax luv:PassengerLoyaltyAirTransportation100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

luv:PassengerRevenueNonLoyalty



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-30
Value32204452440046834043453744174605394842014182
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax76.177.778.079.378.579.579.280.279.979.778.9
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax76.177.778.079.378.579.579.280.279.979.778.9
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax luv:PassengerRevenueNonLoyalty100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:CargoAndFreight



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-30
Value3943424442454344424542
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax0.90.80.70.70.80.80.80.80.80.90.8
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax0.90.80.70.70.80.80.80.80.80.90.8
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:CargoAndFreight100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:Passenger



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-30
Value38455314523054874745531851945358458548944944
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax90.892.892.792.992.293.293.293.392.792.893.2
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax90.892.892.792.992.293.293.293.392.792.893.2
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:Passenger100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ProductAndServiceOther



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-30
Value350373367378362341338340317319317
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax8.36.56.56.47.06.06.15.96.46.06.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax8.36.56.56.47.06.06.15.96.46.06.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:ProductAndServiceOther100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Revenues

Sales Revenue Net

Operating Expenses

Operating Costs And Expenses

us-gaap:OperatingCostsAndExpenses



Period End2020-03-312019-03-31
Value43444644
Percentage of OperatingCostsAndExpenses100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax102.690.2

Operating Income Loss

us-gaap:OperatingIncomeLoss



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312009-09-302009-06-302009-03-31
Value-1106658199685058207989726167738341250658846695127694410261225108578062161477521538639043370915146022147001142163553635416722123-50
Percentage of OperatingIncomeLoss100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax-2.611.614.516.49.814.414.316.912.514.715.721.813.516.713.523.719.620.623.021.217.713.412.815.55.28.78.69.31.72.21.210.00.63.65.25.03.76.911.111.52.16.20.84.7-2.1

Interest Expense

Interest Expense Debt

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

us-gaap:InterestExpenseDebt

us-gaap:InterestRateSwap, us-gaap:FairValueHedging, us-gaap:DesignatedAsHedgingInstrument, us-gaap:GainLossOnDerivativeInstruments



Period End2020-03-31
Value0.0
Percentage of InterestExpenseDebt0.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax0.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:InterestRateSwap us-gaap:FairValueHedging us-gaap:DesignatedAsHedgingInstrument us-gaap:GainLossOnDerivativeInstruments0.0

us-gaap:InterestRateSwap, us-gaap:FairValueHedging, us-gaap:DesignatedAsHedgingInstrument, us-gaap:InterestExpense



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value4566666666666
Percentage of InterestExpenseDebt0.00.00.00.00.00.00.00.00.00.00.00.00.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax0.10.10.10.10.10.10.10.10.10.10.10.10.1
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:InterestRateSwap us-gaap:FairValueHedging us-gaap:DesignatedAsHedgingInstrument us-gaap:InterestExpense0.00.00.00.00.00.00.00.00.00.00.00.00.0

Other Nonoperating Income Expense

us-gaap:OtherNonoperatingIncomeExpense



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-06-302009-03-31
Value-280-3-2-2-2-8-4-4-27-39-74-94-27-6443-114-162-272-88-32-293-66-35359-47466210-62170-19700591060146-4-23-23
Percentage of OtherNonoperatingIncomeExpense100.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax-0.70.0-0.1-0.0-0.0-0.0-0.1-0.1-0.1-0.5-0.7-1.3-1.9-0.5-1.20.8-2.4-3.3-5.1-1.7-0.7-6.3-1.4-0.11.31.3-1.01.11.50.2-1.34.3-4.8-9.42.71.93.40.04.6-0.2-0.9-1.0

us-gaap:ReclassificationOutOfAccumulatedOtherComprehensiveIncome, luv:AccumulatedOtherComprehensiveIncomeLossNetOfTax

us-gaap:ReclassificationOutOfAccumulatedOtherComprehensiveIncome, us-gaap:CommodityContract



Period End2020-03-31
Value2
Percentage of OtherNonoperatingIncomeExpense-7.1
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax0.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:ReclassificationOutOfAccumulatedOtherComprehensiveIncome us-gaap:CommodityContract0.0

Nonoperating Income Expense

us-gaap:NonoperatingIncomeExpense



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-30
Value-34100-1-3-12-12-14-35-43-80-105-36-7728-128-179-292-108-57-319-89-292929-702434-18-92137-36900-96-24200
Percentage of NonoperatingIncomeExpense100.0100.00.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax-0.80.00.00.0-0.0-0.1-0.2-0.2-0.3-0.7-0.8-1.4-2.2-0.7-1.50.5-2.7-3.6-5.5-2.1-1.3-6.9-1.9-0.60.70.6-1.50.60.8-0.4-2.03.4-9.0-10.51.6-3.1-7.8-0.0-0.0

Income Tax Expense Benefit

us-gaap:IncomeTaxExpenseBenefit



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-06-302009-03-31
Value-50153160227117163171227139-115028842420228723048430531134936927011119628192160139354717140611440013285072616-16
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 RevenueFromContractWithCustomerExcludingAssessedTax-1.22.72.83.82.32.93.14.02.8-21.85.47.44.15.74.59.06.36.26.67.26.12.44.15.62.23.53.00.91.10.43.01.53.5-2.02.80.49.20.02.30.20.6-0.7

us-gaap:DerivativeInstrumentRisk, us-gaap:ReclassificationOutOfAccumulatedOtherComprehensiveIncome

us-gaap:CommodityContract, us-gaap:ReclassificationOutOfAccumulatedOtherComprehensiveIncome



Period End2020-03-312019-09-302019-06-302019-03-312018-09-30
Value-5-40-35
Percentage of IncomeTaxExpenseBenefit10.0-2.50.0-2.62.9
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax-0.1-0.10.0-0.10.1
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:CommodityContract us-gaap:ReclassificationOutOfAccumulatedOtherComprehensiveIncome0.00.00.00.00.0

Comprehensive Income Net Of Tax

us-gaap:ComprehensiveIncomeNetOfTax



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-06-30
Value-21951556667546326272995354720366307953626985171086668388345686449-456126588143393876784211-35265216003467740-1171216
Percentage of ComprehensiveIncomeNetOfTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax-5.29.010.011.49.04.613.116.611.138.611.913.87.413.810.120.213.87.86.513.410.2-9.92.611.73.48.61.91.62.04.9-0.86.65.3-12.7-0.611.224.90.0-0.32.78.3

us-gaap:StatementEquityComponents

us-gaap:AccumulatedOtherComprehensiveIncome



Period End2020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-31
Value-125-93-667611422084
Percentage of ComprehensiveIncomeNetOfTax57.1-16.4-9.816.415.623.115.4
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax-3.0-1.6-1.11.52.03.81.7
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:AccumulatedOtherComprehensiveIncome0.00.00.00.00.00.00.0

us-gaap:RetainedEarnings



Period End2020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-31
Value-94659741387615733463
Percentage of ComprehensiveIncomeNetOfTax42.9116.4109.883.684.476.984.6
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax-2.211.712.57.511.012.89.4
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:RetainedEarnings0.00.00.00.00.00.00.0

Net Income Loss

us-gaap:NetIncomeLoss



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312009-09-302009-06-302009-03-31
Value-9451465974138765461573346318885037463515223888205115365846084531903294651522122592245978162289815200513120511211116-1691-91
Percentage of NetIncomeLoss100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax-2.29.011.712.57.511.511.012.89.435.89.513.07.210.37.615.210.610.811.011.910.34.16.99.33.64.85.74.81.41.90.44.92.53.7-3.23.90.24.26.43.50.44.3-0.63.5-3.9

Net Income Loss Available To Common Stockholders Basic

Net Income Loss Available To Common Stockholders Diluted

Assets

us-gaap:Assets



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-06-302010-03-312009-12-312008-12-31
Value2688525895264672637426459262432688226465255032511024249239212376323286230452244722241213122115921075211632020020539208911997619345193641938219197185961881318516188261806800164141546314987145301426914068
Percentage of Assets100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Liabilities And Stockholders Equity

us-gaap:LiabilitiesAndStockholdersEquity



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-06-302010-03-312009-12-312008-12-31
Value2688525895264672637426459262432688226465255032511024249239212376323286230452244722241213122115921075211632020020539208911997619345193641938219197185961881318516188261806800164141546314987145301426914068
Percentage of LiabilitiesAndStockholdersEquity100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Stockholders Equity

us-gaap:StockholdersEquity



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-06-302010-03-312009-12-312008-12-312007-12-312006-12-31
Value9075983299319940979198531015399979619104308800853082048441804778217496735869687158690267757429751671907336701367816961699270026840709768770065876237554855365466495369416449
Percentage of StockholdersEquity100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets33.838.037.537.737.037.537.837.837.741.536.335.734.536.234.934.833.734.532.934.032.633.536.236.036.037.936.235.036.337.637.236.937.738.136.338.040.140.337.038.138.335.20.00.0

us-gaap:StatementEquityComponents

us-gaap:AccumulatedOtherComprehensiveIncome



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-312010-12-312009-12-312008-12-312007-12-312006-12-31
Value-186-61-633096204122987812-323-1051-738-3-119-224-262-578-9841241582
Percentage of StockholdersEquity-2.0-0.6-0.60.31.00.24.13.00.80.1-3.8-14.3-10.9-0.0-1.7-3.3-4.2-10.6-19.917.99.0
Percentage of Assets-0.7-0.2-0.20.10.40.11.51.10.30.0-1.4-4.9-3.7-0.0-0.6-1.2-1.7-4.1-7.00.00.0
Percentage of Assets us-gaap:AccumulatedOtherComprehensiveIncome0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:AdditionalPaidInCapital



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-312010-12-312009-12-312008-12-312007-12-312006-12-31
Value158215811554153415131510148514691452145114101374131512311210122211831216121512071142
Percentage of StockholdersEquity17.416.115.615.415.515.314.614.715.113.916.718.719.416.817.317.819.022.224.517.417.7
Percentage of Assets5.96.15.95.85.75.85.55.65.75.86.16.46.56.46.56.87.78.58.60.00.0
Percentage of Assets us-gaap:AdditionalPaidInCapital0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:RetainedEarnings



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-312010-12-312009-12-312008-12-312007-12-312006-12-31
Value17757179451752516962163201596715402148781423814621114189409741664315768539553994983491947884307
Percentage of StockholdersEquity195.7182.5176.5170.6166.7162.1151.7148.8148.0140.2135.3127.9109.587.782.578.486.691.299.369.066.8
Percentage of Assets66.069.366.264.361.760.857.356.255.858.249.044.136.733.231.029.934.934.935.00.00.0
Percentage of Assets us-gaap:RetainedEarnings0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:TreasuryStock



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-312010-12-312009-12-312008-12-312007-12-312006-12-31
Value-10886-10441-9893-9394-8946-8452-7954-7456-6957-6462-4872-3182-2026-1131-675-324-891-963-1005-1103-390
Percentage of StockholdersEquity-120.0-106.2-99.6-94.5-91.4-85.8-78.3-74.6-72.3-62.0-57.7-43.2-29.9-15.4-9.7-4.7-14.3-17.6-20.3-15.9-6.0
Percentage of Assets-40.5-40.3-37.4-35.6-33.8-32.2-29.6-28.2-27.3-25.7-20.9-14.9-10.0-5.8-3.6-1.8-5.8-6.7-7.10.00.0
Percentage of Assets us-gaap:TreasuryStock0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

Assets Current

us-gaap:AssetsCurrent



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-06-302010-03-312009-12-312008-12-31
Value702859745650555454835028560154084801481542804343465844984839446945744024457345964963440449855317481444564773486445144227465246915120434500532942793971362133582653
Percentage of AssetsCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets26.123.121.321.120.719.220.820.418.819.217.718.219.619.321.019.920.618.921.621.823.521.824.325.524.123.024.625.123.522.724.725.327.224.025.728.632.527.726.524.923.518.9

Cash And Cash Equivalents At Carrying Value

us-gaap:CashAndCashEquivalentsAtCarryingValue



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312009-06-302009-03-312008-12-312007-12-312006-12-31
Value39402548248824462344185421042114182214951460153718511680196620402388158317401772202512821832188217411355133314891338111311681083155882900203912610989111011149461145136822131390
Percentage of CashAndCashEquivalentsAtCarryingValue100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets14.79.89.49.38.97.17.88.07.16.06.06.47.87.28.59.110.77.48.28.49.66.38.99.08.77.06.97.77.06.06.25.88.34.65.78.412.48.20.06.67.67.80.00.09.70.00.0

Short Term Investments

us-gaap:ShortTermInvestments



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-06-302010-03-312009-12-312008-12-31
Value16051524152815401517183517161572142117781580161516311625148013751194146813561360141317061728211217571797199519041797185720672173222623150024262277213516631479435
Percentage of ShortTermInvestments100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets6.05.95.85.85.77.06.45.95.67.16.56.86.97.06.46.15.46.96.46.56.78.48.410.18.89.310.39.89.410.011.011.711.812.814.814.714.814.714.211.410.43.1

Receivables Net Current

Prepaid Expense And Other Assets Current

us-gaap:PrepaidExpenseAndOtherAssetsCurrent



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-31
Value2562872392813543105144984484602232502353102142021921882392552702322912762412502282092152102242033182380026289
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 Assets1.01.10.91.11.31.21.91.91.81.80.91.01.01.30.90.90.90.91.11.21.31.11.41.31.21.31.21.11.11.11.21.11.71.30.61.41.60.6

Property Plant And Equipment Gross

us-gaap:PropertyPlantAndEquipmentGross



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-06-302010-03-312009-12-312008-12-31
Value2790127713282872789727648292562871628232281692822927801272022678326464258412565825231246852382523523230622251322056215872106320820204382022319991194971929418942185511842100164151634316182160231588815871
Percentage of PropertyPlantAndEquipmentGross100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets103.8107.0106.9105.8104.5111.5106.8106.7110.5112.4114.6113.7112.7113.6112.1114.3113.4115.8112.6111.6109.0111.5107.4103.3105.4107.6105.5104.3104.1104.8102.6102.398.5102.0100.593.8100.0105.7108.0110.3111.3112.8

Accumulated Depreciation Depletion And Amortization Property Plant And Equipment

us-gaap:AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-06-302010-03-312009-12-312008-12-31
Value1091210688104451016498759731943791669396969096459523949794209295936492679084889686638455822180917860764374317235705968616731672266006456629400591957655555540252544831
Percentage of AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets40.641.339.538.537.337.135.134.636.838.639.839.840.040.540.341.741.742.642.041.140.040.739.437.638.338.437.436.435.736.235.735.634.334.834.431.936.137.337.137.236.834.3

Property Plant And Equipment Net

us-gaap:PropertyPlantAndEquipmentNet



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-06-302010-03-312009-12-312008-12-31
Value1698917025178421773317773195251927919066187731853918156176791728617044165461629415964156011492914860146071429213965137271342013389132031316413130127661257212342120951212700104961057810627106211063411040
Percentage of PropertyPlantAndEquipmentNet100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets63.265.767.467.267.274.471.772.073.673.874.973.972.773.271.872.671.873.270.670.569.070.868.065.767.269.268.267.968.468.666.866.764.267.166.261.963.968.470.973.174.578.5

Goodwill

us-gaap:Goodwill



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302010-12-31
Value970970970970970970970970970970970970970970970970970970970970970970970970970970970970970970970970970970000
Percentage of Goodwill100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0
Percentage of Assets3.63.73.73.73.73.73.63.73.83.94.04.14.14.24.24.34.44.64.64.64.64.84.74.64.95.05.05.05.15.25.25.25.25.45.45.10.0

Intangible Assets Net Excluding Goodwill

us-gaap:IntangibleAssetsNetExcludingGoodwill



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-31
Value296296311312313400403406410413416419423426430434460464469474479363366369372166
Percentage of IntangibleAssetsNetExcludingGoodwill100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets1.11.11.21.21.21.51.51.51.61.61.71.81.81.81.91.92.12.22.22.22.31.81.81.81.90.9

Finite Lived Intangible Assets Net

Deferred Tax Assets Liabilities Net

Other Assets Noncurrent

us-gaap:OtherAssetsNoncurrent



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-06-302010-03-312009-12-312008-12-31
Value6205776536937257201032102195978684392984977469071473371768764962353461987777253041838458363361951364162600589606389288277375
Percentage of OtherAssetsNoncurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets2.32.22.52.62.72.73.83.93.83.13.53.93.63.33.03.23.33.43.23.12.92.63.04.23.92.72.22.03.03.43.32.83.43.52.74.43.63.92.62.01.92.7

Liabilities Current

us-gaap:LiabilitiesCurrent



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-06-302010-03-312009-12-312008-12-31
Value1024189528629861187237905784377167162690569657097745868447816783382537406708468766903592364467027644156765546577954114650496950805047453300435833053338291826762806
Percentage of LiabilitiesCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets38.134.632.632.633.030.129.229.228.127.528.729.731.429.433.934.937.134.833.532.632.629.331.433.632.229.328.629.828.225.026.427.426.825.129.728.126.621.422.320.118.819.9

Long Term Debt Current

Accounts Payable Current

us-gaap:AccountsPayableCurrent



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302010-12-31
Value1043157412741330141214161224133812431320112412171214117810211247115311881235113411451203118512921299124711341232125011071140115312081057000
Percentage of AccountsPayableCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets3.96.14.85.05.35.44.65.14.95.34.65.15.15.14.45.65.25.65.85.45.46.05.86.26.56.45.96.46.56.06.16.26.45.96.15.50.0

Other Accrued Liabilities Current

us-gaap:OtherAccruedLiabilitiesCurrent



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-06-302009-12-31
Value18025524926038338833220015834622820520223721921020524621925819223625523321722320320219821219222721127800225211272187
Percentage of OtherAccruedLiabilitiesCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets0.71.00.91.01.41.51.20.80.61.40.90.90.91.01.00.90.91.21.01.20.91.21.21.11.11.21.01.01.01.11.01.21.11.51.61.61.41.41.81.3

Taxes Payable Current

us-gaap:TaxesPayableCurrent



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312012-12-31
Value66227188269291220196277282203180266280184165239246179157234229163142214218146128
Percentage of TaxesPayableCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets0.20.90.71.01.10.80.71.01.10.80.71.11.20.80.71.11.10.80.71.11.10.80.71.01.10.80.7

Accrued Income Taxes Current

Long Term Debt Noncurrent

Deferred Tax Liabilities Noncurrent

Pension And Other Postretirement Defined Benefit Plans Liabilities Noncurrent

us-gaap:PensionAndOtherPostretirementDefinedBenefitPlansLiabilitiesNoncurrent



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302010-12-31
Value294288245240235232294288282275274267261256215211206201179176172169143144140138169162154148116112109107000
Percentage of PensionAndOtherPostretirementDefinedBenefitPlansLiabilitiesNoncurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets1.11.10.90.90.90.91.11.11.11.11.11.11.11.10.90.90.90.90.80.80.80.80.70.70.70.70.90.80.80.80.60.60.60.60.60.50.0

Other Liabilities Noncurrent

us-gaap:OtherLiabilitiesNoncurrent



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-06-302010-03-312009-12-312008-12-31
Value694706644639608650748692706707713708703728661681703760931708109512556587107267711198121111531124111494592491000460465490423493802
Percentage of OtherLiabilitiesNoncurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets2.62.72.42.42.32.52.82.62.82.82.93.03.03.12.93.03.23.64.43.45.26.23.23.43.64.06.26.26.06.05.95.14.95.05.24.42.83.03.32.93.55.7

Stockholders Equity

us-gaap:StockholdersEquity



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-06-302010-03-312009-12-312008-12-312007-12-312006-12-31
Value9075983299319940979198531015399979619104308800853082048441804778217496735869687158690267757429751671907336701367816961699270026840709768770065876237554855365466495369416449
Percentage of StockholdersEquity100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets33.838.037.537.737.037.537.837.837.741.536.335.734.536.234.934.833.734.532.934.032.633.536.236.036.037.936.235.036.337.637.236.937.738.136.338.040.140.337.038.138.335.20.00.0

us-gaap:StatementEquityComponents

us-gaap:AccumulatedOtherComprehensiveIncome



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-312010-12-312009-12-312008-12-312007-12-312006-12-31
Value-186-61-633096204122987812-323-1051-738-3-119-224-262-578-9841241582
Percentage of StockholdersEquity-2.0-0.6-0.60.31.00.24.13.00.80.1-3.8-14.3-10.9-0.0-1.7-3.3-4.2-10.6-19.917.99.0
Percentage of Assets-0.7-0.2-0.20.10.40.11.51.10.30.0-1.4-4.9-3.7-0.0-0.6-1.2-1.7-4.1-7.00.00.0
Percentage of Assets us-gaap:AccumulatedOtherComprehensiveIncome0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:AdditionalPaidInCapital



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-312010-12-312009-12-312008-12-312007-12-312006-12-31
Value158215811554153415131510148514691452145114101374131512311210122211831216121512071142
Percentage of StockholdersEquity17.416.115.615.415.515.314.614.715.113.916.718.719.416.817.317.819.022.224.517.417.7
Percentage of Assets5.96.15.95.85.75.85.55.65.75.86.16.46.56.46.56.87.78.58.60.00.0
Percentage of Assets us-gaap:AdditionalPaidInCapital0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:RetainedEarnings



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-312010-12-312009-12-312008-12-312007-12-312006-12-31
Value17757179451752516962163201596715402148781423814621114189409741664315768539553994983491947884307
Percentage of StockholdersEquity195.7182.5176.5170.6166.7162.1151.7148.8148.0140.2135.3127.9109.587.782.578.486.691.299.369.066.8
Percentage of Assets66.069.366.264.361.760.857.356.255.858.249.044.136.733.231.029.934.934.935.00.00.0
Percentage of Assets us-gaap:RetainedEarnings0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:TreasuryStock



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-312010-12-312009-12-312008-12-312007-12-312006-12-31
Value-10886-10441-9893-9394-8946-8452-7954-7456-6957-6462-4872-3182-2026-1131-675-324-891-963-1005-1103-390
Percentage of StockholdersEquity-120.0-106.2-99.6-94.5-91.4-85.8-78.3-74.6-72.3-62.0-57.7-43.2-29.9-15.4-9.7-4.7-14.3-17.6-20.3-15.9-6.0
Percentage of Assets-40.5-40.3-37.4-35.6-33.8-32.2-29.6-28.2-27.3-25.7-20.9-14.9-10.0-5.8-3.6-1.8-5.8-6.7-7.10.00.0
Percentage of Assets us-gaap:TreasuryStock0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

Common Stock Value

us-gaap:CommonStockValue



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-06-302010-03-312009-12-312008-12-31
Value80880880880880880880880880880880880880880880880880880880880880880880880880880880880880880880880880880800808808808808808808
Percentage of CommonStockValue100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets3.03.13.13.13.13.13.03.13.23.23.33.43.43.53.53.63.63.83.83.83.84.03.93.94.04.24.24.24.24.34.34.44.34.54.54.34.95.25.45.65.75.7

Retained Earnings Accumulated Deficit

us-gaap:RetainedEarningsAccumulatedDeficit



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-06-302010-03-312009-12-312008-12-31
Value1775717945175251696216320159671540214878142381462112806123781170811418109571063198729409892283877829741672666979655564316246601558185768570056925486539500539953995075497349834919
Percentage of RetainedEarningsAccumulatedDeficit100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets66.069.366.264.361.760.857.356.255.858.252.851.749.349.047.547.444.444.142.239.837.036.735.433.432.833.232.331.030.331.030.330.729.129.929.428.532.934.933.934.234.935.0

Treasury Stock Value

us-gaap:TreasuryStockValue



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-06-302010-03-312009-12-312008-12-31
Value1088610441989393948946845279547456695764626114581554194872462143733677318231892692232220261833164514171131113299576867560956436532400-885-8919159459631005
Percentage of TreasuryStockValue100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets40.540.337.435.633.832.229.628.227.325.725.224.322.820.920.119.516.514.915.112.811.010.08.97.97.15.85.85.14.03.63.23.01.91.81.60.6-5.4-5.86.16.56.77.1

Accumulated Other Comprehensive Income Loss Net Of Tax

us-gaap:AccumulatedOtherComprehensiveIncomeLossNetOfTax



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-06-302010-03-312009-12-312008-12-31
Value-186-61-633096204122987812-136-263-312-323-499-628-894-1051-903-664-742-738-92111-12-3-114-248-111-119-125-320-57-2240079-262-641-518-578-984
Percentage of AccumulatedOtherComprehensiveIncomeLossNetOfTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets-0.7-0.2-0.20.10.40.11.51.10.30.0-0.6-1.1-1.3-1.4-2.2-2.8-4.0-4.9-4.3-3.2-3.5-3.7-0.40.5-0.1-0.0-0.6-1.3-0.6-0.6-0.7-1.7-0.3-1.2-2.9-0.60.5-1.7-4.3-3.6-4.1-7.0

Net Cash Provided By Used In Operating Activities

us-gaap:NetCashProvidedByUsedInOperatingActivities



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-06-302009-03-31
Value-37782410919661105989127116311002563996746162570985611121616324836627145220424013381119428778983231464145122513840096515600540373135286
Percentage of NetCashProvidedByUsedInOperatingActivities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax-8.914.419.316.321.517.322.828.420.310.718.813.033.314.016.720.733.56.515.712.332.94.45.026.726.99.416.824.15.510.83.130.733.7-5.15.731.150.10.017.014.25.212.1

Net Cash Provided By Used In Investing Activities

us-gaap:NetCashProvidedByUsedInInvestingActivities



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-06-302009-03-31
Value-5144-359-252164-668-604-694-73-735-620-584-470-839-584-674-175-946-259-407-302-468-44-857-358-359-300-472-189-277-355-12-105000-231-12640-610-322-377-638
Percentage of NetCashProvidedByUsedInInvestingActivities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax-0.12.5-6.4-4.33.2-11.7-10.8-12.1-1.5-13.9-11.7-10.2-9.6-16.5-11.4-12.5-3.6-19.0-4.9-8.0-6.8-10.1-0.9-17.1-8.6-7.9-6.5-11.6-4.5-6.4-7.7-0.3-25.6-3.2-14.2-7.4-40.6-0.0-19.3-12.2-14.4-27.1

Net Cash Provided By Used In Financing Activities

us-gaap:NetCashProvidedByUsedInFinancingActivities



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-06-302009-03-31
Value1774-908-690-612-779-571-677-645-602207-453-476-984-156-346-786-636465-609-473-407-286-246-340-375-225-327-286-97-102-265-484-7650044-1480-51-5543129
Percentage of NetCashProvidedByUsedInFinancingActivities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax41.9-15.8-12.2-10.4-15.1-10.0-12.1-11.2-12.23.9-8.5-8.3-20.2-3.1-6.7-14.6-13.29.3-11.5-9.3-9.2-6.2-5.1-6.8-9.0-5.0-7.0-7.0-2.3-2.4-5.7-12.1-18.6-5.2-2.21.4-4.8-0.0-1.6-2.11.65.5

Net Cash Provided By Used In Operating Activities

us-gaap:NetCashProvidedByUsedInOperatingActivities



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-06-302009-03-31
Value-37782410919661105989127116311002563996746162570985611121616324836627145220424013381119428778983231464145122513840096515600540373135286
Percentage of NetCashProvidedByUsedInOperatingActivities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax-8.914.419.316.321.517.322.828.420.310.718.813.033.314.016.720.733.56.515.712.332.94.45.026.726.99.416.824.15.510.83.130.733.7-5.15.731.150.10.017.014.25.212.1

Net Income Loss

us-gaap:NetIncomeLoss



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312009-09-302009-06-302009-03-31
Value-9451465974138765461573346318885037463515223888205115365846084531903294651522122592245978162289815200513120511211116-1691-91
Percentage of NetIncomeLoss100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax-2.29.011.712.57.511.511.012.89.435.89.513.07.210.37.615.210.610.811.011.910.34.16.99.33.64.85.74.81.41.90.44.92.53.7-3.23.90.24.26.43.50.44.3-0.63.5-3.9

Increase Decrease In Other Operating Capital Net

Net Cash Provided By Used In Investing Activities

us-gaap:NetCashProvidedByUsedInInvestingActivities



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-06-302009-03-31
Value-5144-359-252164-668-604-694-73-735-620-584-470-839-584-674-175-946-259-407-302-468-44-857-358-359-300-472-189-277-355-12-105000-231-12640-610-322-377-638
Percentage of NetCashProvidedByUsedInInvestingActivities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax-0.12.5-6.4-4.33.2-11.7-10.8-12.1-1.5-13.9-11.7-10.2-9.6-16.5-11.4-12.5-3.6-19.0-4.9-8.0-6.8-10.1-0.9-17.1-8.6-7.9-6.5-11.6-4.5-6.4-7.7-0.3-25.6-3.2-14.2-7.4-40.6-0.0-19.3-12.2-14.4-27.1

Payments To Acquire Property Plant And Equipment

Net Cash Provided By Used In Financing Activities

us-gaap:NetCashProvidedByUsedInFinancingActivities



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-06-302009-03-31
Value1774-908-690-612-779-571-677-645-602207-453-476-984-156-346-786-636465-609-473-407-286-246-340-375-225-327-286-97-102-265-484-7650044-1480-51-5543129
Percentage of NetCashProvidedByUsedInFinancingActivities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax41.9-15.8-12.2-10.4-15.1-10.0-12.1-11.2-12.23.9-8.5-8.3-20.2-3.1-6.7-14.6-13.29.3-11.5-9.3-9.2-6.2-5.1-6.8-9.0-5.0-7.0-7.0-2.3-2.4-5.7-12.1-18.6-5.2-2.21.4-4.8-0.0-1.6-2.11.65.5

Proceeds From Issuance Of Long Term Debt

Payments Of Dividends

us-gaap:PaymentsOfDividends



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-09-302015-06-302015-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-06-302009-03-31
Value18809698178091931480757612306263964950811300-7-130-37-37
Percentage of PaymentsOfDividends100.00.0100.0100.0100.00.0100.0100.0100.00.0100.0100.0100.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Payments Of Dividends

us-gaap:PaymentsOfDividends



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-09-302015-06-302015-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-06-302009-03-31
Value18809698178091931480757612306263964950811300-7-130-37-37
Percentage of PaymentsOfDividends100.00.0100.0100.0100.00.0100.0100.0100.00.0100.0100.0100.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Payments For Repurchase Of Common Stock

us-gaap:PaymentsForRepurchaseOfCommonStock



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-30
Value4515505004505005005005005003503004005503002507005000500380300200200240315150251100755022550224000000
Percentage of PaymentsForRepurchaseOfCommonStock100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.00.00.00.00.0

Debt Instrument Interest Rate Stated Percentage

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

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

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

Share Based Compensation

Deferred Tax Liabilities

Unrecognized Tax Benefits

Operating Lease Right Of Use Asset

us-gaap:OperatingLeaseRightOfUseAsset



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-31
Value127813491352142415080
Percentage of OperatingLeaseRightOfUseAsset100.0100.0100.0100.0100.00.0

Cash And Cash Equivalents Period Increase Decrease

Proceeds From Sale Of Short Term Investments

us-gaap:ProceedsFromSaleOfShortTermInvestments



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-06-302009-03-31
Value9487985455285756775315745605255665735565925495915304915096147878047756807365313001310485101349119712031144
Percentage of ProceedsFromSaleOfShortTermInvestments100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

luv:AirTrafficLiabilityCurrentPeriodSales



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
Value4565488652325474570448265273552454034450484354385415
Percentage of AirTrafficLiabilityCurrentPeriodSales100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

luv:AirTrafficLiabilityRevenueamountsinbeginningbalance



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
Value-1949-656-305-847-2008-381-485-786-1827-319-410-669-1701
Percentage of AirTrafficLiabilityRevenueamountsinbeginningbalance100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

luv:AirTrafficLiabilityRevenuefromCurrentPeriodSales



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
Value-1915-4686-4945-4657-2752-4958-4735-4638-2711-4589-4552-4766-2796
Percentage of AirTrafficLiabilityRevenuefromCurrentPeriodSales100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

luv:AssetsConstructedforOthersDuringPeriod



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-31
Value34-82824214546404070393850315055606646374329271913154728
Percentage of AssetsConstructedforOthersDuringPeriod100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

luv:OtherRevenueRecognizedFromPointsRedeemed



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-30
Value-19-27-20-17-16-22-17-11-11-15-9-4
Percentage of OtherRevenueRecognizedFromPointsRedeemed100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

luv:PassengerRevenueRecognizedFromPointsRedeemed



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-30
Value-461-673-657-622-535-605-623-588-491-539-616-602
Percentage of PassengerRevenueRecognizedFromPointsRedeemed100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

luv:RevenueAmountsDeferredAssociatedWithPointsAwarded



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-30
Value656746727757711690669719634639621632
Percentage of RevenueAmountsDeferredAssociatedWithPointsAwarded100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

luv:SupplierProceeds



Period End2020-03-312019-03-31
Value-3000
Percentage of SupplierProceeds100.00.0

us-gaap:AircraftMaintenanceMaterialsAndRepairs



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-30
Value2723073133102932932832742572432632512432442582802622762592402292442482362502712812912703002912729540019975000
Percentage of AircraftMaintenanceMaterialsAndRepairs100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect



Period End2020-03-312019-03-31
Value1392490
Percentage of CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect100.0100.0

us-gaap:CommonStockDividendsPerShareCashPaid



Period End2020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-31
Value0.180.180.180.160.160.160.125
Percentage of CommonStockDividendsPerShareCashPaid100.0100.0100.0100.0100.0100.0100.0

us-gaap:DepreciationAndAmortization



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-06-302009-03-31
Value311313308302297331301292277279302319318318315299290264258250244251238228221221213210224217202201714001556270154-154150-150
Percentage of DepreciationAndAmortization100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DerivativeCostOfHedge



Period End2020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-312017-09-302017-06-302017-03-31
Value24202828343434343434
Percentage of DerivativeCostOfHedge100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

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

us-gaap:DerivativeGainLossOnDerivativeNet

us-gaap:InterestRateSwap, us-gaap:Nondesignated, us-gaap:OtherNonoperatingIncomeExpense



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value-2400000011
Percentage of DerivativeGainLossOnDerivativeNet100.00.00.00.00.00.00.0100.0100.0

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

us-gaap:DerivativeInstrumentsGainLossReclassifiedFromAccumulatedOCIIntoIncomeEffectivePortionNet

us-gaap:CommodityContract, us-gaap:CashFlowHedging, srt:Fuel



Period End2020-03-312019-12-312019-09-302019-03-312018-12-312018-09-30
Value-22-20-19-11120
Percentage of DerivativeInstrumentsGainLossReclassifiedFromAccumulatedOCIIntoIncomeEffectivePortionNet100.0100.0100.0100.0100.0100.0

us-gaap:InterestRateSwap, us-gaap:CashFlowHedging, us-gaap:GainLossOnDerivativeInstruments



Period End2020-03-31
Value0.0
Percentage of DerivativeInstrumentsGainLossReclassifiedFromAccumulatedOCIIntoIncomeEffectivePortionNet-0.0

us-gaap:InterestRateSwap, us-gaap:CashFlowHedging, us-gaap:InterestExpense



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value0-2-2-1-1-2-1-1-2-3-2-3-3
Percentage of DerivativeInstrumentsGainLossReclassifiedFromAccumulatedOCIIntoIncomeEffectivePortionNet-0.010.010.50.09.1-200.0-5.00.00.00.00.00.00.0

us-gaap:DividendsCash



Period End2020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-31
Value94969989919375
Percentage of DividendsCash100.0100.0100.0100.0100.0100.0100.0

us-gaap:StatementEquityComponents

us-gaap:RetainedEarnings



Period End2020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-31
Value949699-89-91-93-75
Percentage of DividendsCash100.0100.0100.0-100.0-100.0-100.0-100.0

us-gaap:EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate



Period End2020-03-312019-03-31
Value0.3430.231
Percentage of EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate100.0100.0

luv:FairValueAssetsAndLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliation

us-gaap:FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetPurchases

us-gaap:CommodityContract



Period End2020-03-312018-06-302017-12-312017-09-302017-06-302016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-31
Value839382546306159719840818262226777921357268618959579157172
Percentage of FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetPurchases100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

luv:FairValueAssetsAndLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliation

us-gaap:FairValueRecurringBasisUnobservableInputReconciliationAssetLiabilityGainLossOci

us-gaap:CommodityContract



Period End2020-03-31
Value-106
Percentage of FairValueRecurringBasisUnobservableInputReconciliationAssetLiabilityGainLossOci100.0

us-gaap:FuelCosts



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-06-302009-03-31
Value8701105109011361015119112051202101810251003990922951941903852798936100587711681386142513141450148914571505152815771510564300103836190933-821726-698
Percentage of FuelCosts100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ReclassificationOutOfAccumulatedOtherComprehensiveIncome, luv:AccumulatedOtherComprehensiveIncomeLossNetOfTax

us-gaap:ReclassificationOutOfAccumulatedOtherComprehensiveIncome, us-gaap:CommodityContract



Period End2020-03-31
Value22
Percentage of FuelCosts2.5

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

us-gaap:GainLossOnDerivativeInstrumentsNetPretax

us-gaap:InterestRateSwap, us-gaap:FairValueHedging, us-gaap:Nondesignated, us-gaap:GainLossOnDerivativeInstruments



Period End2020-03-31
Value0.0
Percentage of GainLossOnDerivativeInstrumentsNetPretax0.0

us-gaap:InterestRateSwap, us-gaap:FairValueHedging, us-gaap:Nondesignated, us-gaap:InterestExpense



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value2-100-1-3-2-2-2-1111
Percentage of GainLossOnDerivativeInstrumentsNetPretax0.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:IncomeStatementLocation

srt:Fuel



Period End2020-03-312019-12-312019-09-302019-03-312018-12-312018-09-30
Value-22-20-19-11120
Percentage of GainLossOnDerivativeInstrumentsNetPretax0.00.00.00.00.00.0

us-gaap:GainLossOnDerivativeInstruments



Period End2020-03-31
Value-2
Percentage of GainLossOnDerivativeInstrumentsNetPretax0.0

us-gaap:InterestExpense



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value-2-8-8-7-8-11-9-9-10-10-7-8-8
Percentage of GainLossOnDerivativeInstrumentsNetPretax0.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312009-09-302009-06-302009-03-31
Value-144666819968504817786960602737791117055380961813048168479339777233025257462443344193639412533368159255001821333218417185-20107-107
Percentage of IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:IncomeTaxesPaid



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-06-302009-03-31
Value529216931441153817043812293766026456573465409455111111321201242123294112000273039031
Percentage of IncomeTaxesPaid100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0100.0100.0100.0100.0100.0100.0100.0100.00.0100.00.0100.0100.0100.00.0100.0100.0

us-gaap:IncreaseDecreaseCashCollateralFromCounterparties



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-30
Value-5250-1515-165107565301519937305114347-231-357181-377-17-241-98951180-532815252-181147-194002926400
Percentage of IncreaseDecreaseCashCollateralFromCounterparties100.0100.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:IncreaseDecreaseInAccountsAndOtherReceivables



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-06-302009-03-31
Value-183-19888-18222-226138115790-1235-30532014212-4-41130-13722-1072-735197-74237682600-87-250-42-67-6-22
Percentage of IncreaseDecreaseInAccountsAndOtherReceivables100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:IncreaseDecreaseInAccountsPayableAndAccruedLiabilities



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-06-302009-03-31
Value-1291538106-89-257465161420-50140289-33893-46247-288313537380-134177122-53442424-9816212072-18777225252002381920279-851040
Percentage of IncreaseDecreaseInAccountsPayableAndAccruedLiabilities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0

us-gaap:IncreaseDecreaseInContractWithCustomerLiability



Period End2020-03-312019-03-31
Value701944
Percentage of IncreaseDecreaseInContractWithCustomerLiability100.0100.0

us-gaap:IncreaseDecreaseInDeferredIncomeTaxes



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-31
Value49279-1743613-60910413172999826962-8503155426
Percentage of IncreaseDecreaseInDeferredIncomeTaxes100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:IncreaseDecreaseInOtherOperatingAssets



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-312012-09-302012-06-302012-03-312011-09-30
Value-58-44-79-86-29-163035178-26411981581649-4-63-337-13-149-621-763-62574395142
Percentage of IncreaseDecreaseInOtherOperatingAssets100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:IncreaseDecreaseInOtherOperatingLiabilities



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value-132-67-87-54-690000
Percentage of IncreaseDecreaseInOtherOperatingLiabilities100.0100.0100.0100.0100.00.00.00.00.0

us-gaap:IncrementalCommonSharesAttributableToShareBasedPaymentArrangements



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-06-30
Value0010100111111-1111022202232221111000100110
Percentage of IncrementalCommonSharesAttributableToShareBasedPaymentArrangements0.00.0100.00.0100.00.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0100.0100.0100.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0100.0100.00.0100.0100.0100.00.0

us-gaap:InterestCostsCapitalizedAdjustment



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-31
Value5910999910101115131113121111897656677485
Percentage of InterestCostsCapitalizedAdjustment100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:InterestCostsIncurred



Period End2020-03-312019-03-31
Value2831
Percentage of InterestCostsIncurred100.0100.0

us-gaap:InterestPaidNet



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-06-302009-03-31
Value14291133153718341820161827232723271933213226353334392641343933471840034134033344236
Percentage of InterestPaidNet100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:InvestmentIncomeInterest



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-06-302009-03-31
Value172023242322201512119877665422122221222222900-3-120-43-34
Percentage of InvestmentIncomeInterest100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:LaborAndRelatedExpense



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-30
Value18542247200220681976199019121927182119241795186717331709190916391539165816991607141913901363140612751271129811831197118912221141437000954370300
Percentage of LaborAndRelatedExpense100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:LandingFeesAndOtherRentals



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value3393273453573333233373443303233243323132933073093022793032992852622892952662902922662522782602549580020180600190
Percentage of LandingFeesAndOtherRentals100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

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

us-gaap:LossOnDiscontinuationOfCashFlowHedgeDueToForecastedTransactionProbableOfNotOccurring

us-gaap:CommodityContract, us-gaap:CashFlowHedging, us-gaap:GainLossOnDerivativeInstruments



Period End2020-03-31
Value2
Percentage of LossOnDiscontinuationOfCashFlowHedgeDueToForecastedTransactionProbableOfNotOccurring100.0

us-gaap:DerivativeInstrumentRisk, us-gaap:HedgingDesignation

us-gaap:CommodityContract, us-gaap:Nondesignated



Period End2020-03-31
Value2
Percentage of LossOnDiscontinuationOfCashFlowHedgeDueToForecastedTransactionProbableOfNotOccurring100.0

us-gaap:StatementEquityComponents

us-gaap:OtherComprehensiveIncomeLossBeforeReclassificationsNetOfTax

luv:AccumulatedNetGainLossFromDesignatedOrQualifyingCashFlowHedgesInterestRateDerivative



Period End2020-03-312019-09-302019-06-302019-03-312018-09-30
Value-42-22-20-150
Percentage of OtherComprehensiveIncomeLossBeforeReclassificationsNetOfTax100.0100.0100.0100.00.0

luv:OtherComprehensiveIncomeOtherChangesNetOfTax



Period End2020-03-312019-09-302019-06-302019-03-312018-09-30
Value-3726147
Percentage of OtherComprehensiveIncomeLossBeforeReclassificationsNetOfTax88.1-9.1-30.0-93.30.0

us-gaap:AccumulatedNetGainLossFromDesignatedOrQualifyingCashFlowHedges



Period End2020-03-312019-09-302019-06-302019-03-312018-09-30
Value-108-123-7187159
Percentage of OtherComprehensiveIncomeLossBeforeReclassificationsNetOfTax257.1559.1355.0-580.00.0

us-gaap:AccumulatedNetUnrealizedInvestmentGainLoss



Period End2020-03-312019-09-302019-06-302019-03-312018-09-30
Value433320-19-38
Percentage of OtherComprehensiveIncomeLossBeforeReclassificationsNetOfTax-102.4-150.0-100.0126.70.0

us-gaap:AociIncludingPortionAttributableToNoncontrollingInterest



Period End2020-03-312019-09-302019-06-302019-03-312018-09-30
Value-144-110-6567128
Percentage of OtherComprehensiveIncomeLossBeforeReclassificationsNetOfTax342.9500.0325.0-446.70.0

us-gaap:DerivativeInstrumentRisk

us-gaap:OtherComprehensiveIncomeLossDerivativesQualifyingAsHedgesNetOfTax

us-gaap:AccumulatedNetGainLossFromDesignatedOrQualifyingCashFlowHedges



Period End2020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-312017-09-30
Value-65-80-567610721681123
Percentage of OtherComprehensiveIncomeLossDerivativesQualifyingAsHedgesNetOfTax100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:InterestRateSwap



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-30
Value-3215-15-15-11111322
Percentage of OtherComprehensiveIncomeLossDerivativesQualifyingAsHedgesNetOfTax49.20.018.826.8-14.50.00.90.53.70.01.6

us-gaap:DerivativeInstrumentRisk

us-gaap:OtherComprehensiveIncomeLossDerivativesQualifyingAsHedgesTax

us-gaap:AccumulatedNetGainLossFromDesignatedOrQualifyingCashFlowHedges



Period End2020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-312017-09-30
Value-19-24-172232662573
Percentage of OtherComprehensiveIncomeLossDerivativesQualifyingAsHedgesTax100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:InterestRateSwap



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-30
Value-105-5-4-3001020
Percentage of OtherComprehensiveIncomeLossDerivativesQualifyingAsHedgesTax52.60.020.823.5-13.60.00.01.50.00.00.0

us-gaap:OtherComprehensiveIncomeLossNetOfTax



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-30
Value-1252-93-6676-392114220841481274911176129266157-148-23978-4-646-203123-9134-13786195-263167289-406
Percentage of OtherComprehensiveIncomeLossNetOfTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent



Period End2020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-312017-09-302017-06-302016-09-302016-06-302015-09-302015-06-302015-03-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-312012-09-302012-06-302012-03-312011-09-302011-06-302011-03-31
Value-2825116302230-3001223036-42-433
Percentage of OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent100.0100.0100.0100.0100.0100.00.0100.0100.0100.00.0100.00.00.0100.0100.0100.0100.00.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OtherComprehensiveIncomeLossTaxPortionAttributableToParent1



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-30
Value-93013-3100320032001-200-4111202-103-320-3
Percentage of OtherComprehensiveIncomeLossTaxPortionAttributableToParent1100.0100.00.0100.0100.0100.0100.00.00.0100.0100.00.00.0100.0100.00.00.0100.0100.00.00.0100.0100.0100.0100.0100.00.0100.0100.0100.0100.0100.00.0100.0

us-gaap:DerivativeInstrumentRisk, us-gaap:DerivativeInstrumentsGainLossByHedgingRelationship

us-gaap:OtherComprehensiveIncomeUnrealizedGainLossOnDerivativesArisingDuringPeriodBeforeTax

us-gaap:CommodityContract, us-gaap:CashFlowHedging



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-30
Value-84-7-95-5468-429122228787229
Percentage of OtherComprehensiveIncomeUnrealizedGainLossOnDerivativesArisingDuringPeriodBeforeTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:InterestRateSwap, us-gaap:CashFlowHedging



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value-3214-17-16-12-10111
Percentage of OtherComprehensiveIncomeUnrealizedGainLossOnDerivativesArisingDuringPeriodBeforeTax38.1-200.017.929.6-17.60.20.00.41.31.4

us-gaap:DerivativeInstrumentsGainLossByHedgingRelationship

us-gaap:CashFlowHedging



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value-1167-112-70564301222297973
Percentage of OtherComprehensiveIncomeUnrealizedGainLossOnDerivativesArisingDuringPeriodBeforeTax138.1-100.0117.9129.682.4-100.2100.0100.4101.3101.4

us-gaap:OtherCostAndExpenseOperating



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-06-302009-03-31
Value69876676276873075673973162566769968264266065861957861057256349757756853352653251950153450950349018780039614250327-334338-328
Percentage of OtherCostAndExpenseOperating100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OtherOperatingActivitiesCashFlowStatement



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-31
Value-61-4-43-29-32-18730-40-32-8-37-44-37-43-35-49-66-308-52-35-236-262-178020
Percentage of OtherOperatingActivitiesCashFlowStatement100.0100.0100.0100.0100.0100.0100.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0

us-gaap:PaymentsToAcquireProductiveAssets



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-31
Value224261375230160538454521409520638551414674464462438810230428573408433500407438268193534
Percentage of PaymentsToAcquireProductiveAssets100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:PaymentsToAcquireShortTermInvestments



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-06-302009-03-31
Value10297935295502518026787302007275315595637186417732566035065623167364151159770896900725563663633621536100-1484-56240-18001380-13941697
Percentage of PaymentsToAcquireShortTermInvestments100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ProceedsFromIssuanceOfDebt



Period End2020-03-312019-03-31
Value5000
Percentage of ProceedsFromIssuanceOfDebt100.00.0

us-gaap:ProceedsFromLinesOfCredit



Period End2020-03-312019-03-31
Value10000
Percentage of ProceedsFromLinesOfCredit100.00.0

us-gaap:ProceedsFromNotesPayable



Period End2020-03-312019-03-31
Value10000
Percentage of ProceedsFromNotesPayable100.00.0

us-gaap:ProceedsFromPaymentsForOtherFinancingActivities



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-06-302009-03-31
Value-201-331-121034-13-26747-3-4-3-164-110-3-3-8-4-8-9-13-4-2-6-1-300170-220-3
Percentage of ProceedsFromPaymentsForOtherFinancingActivities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0100.0

us-gaap:ProceedsFromStockPlans



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-06-302009-03-31
Value111191010999977776661116981314232549121365512538004540231244
Percentage of ProceedsFromStockPlans100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DerivativeInstrumentRisk, us-gaap:ReclassificationOutOfAccumulatedOtherComprehensiveIncome

us-gaap:ReclassificationFromAccumulatedOtherComprehensiveIncomeCurrentPeriodNetOfTax

us-gaap:CommodityContract, us-gaap:ReclassificationOutOfAccumulatedOtherComprehensiveIncome



Period End2020-03-312019-09-302019-06-302019-03-312018-09-30
Value24-19-21120
Percentage of ReclassificationFromAccumulatedOtherComprehensiveIncomeCurrentPeriodNetOfTax100.0100.0100.0100.0100.0

us-gaap:StatementEquityComponents

luv:AccumulatedNetGainLossFromDesignatedOrQualifyingCashFlowHedgesInterestRateDerivative



Period End2020-03-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302016-12-312016-09-30
Value02-1110-1-1-219-226-3
Percentage of ReclassificationFromAccumulatedOtherComprehensiveIncomeCurrentPeriodNetOfTax0.0-10.550.09.10.0-5.00.00.00.00.00.00.0

us-gaap:AccumulatedNetUnrealizedInvestmentGainLoss



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-30
Value-5-6-40-3053-1-375575952-65584
Percentage of ReclassificationFromAccumulatedOtherComprehensiveIncomeCurrentPeriodNetOfTax-20.80.021.1-0.0-27.30.025.00.00.00.00.00.00.00.00.0

us-gaap:AociIncludingPortionAttributableToNoncontrollingInterest



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-30
Value191617-191-14-125644-96-102-901113-143-152-197426-82
Percentage of ReclassificationFromAccumulatedOtherComprehensiveIncomeCurrentPeriodNetOfTax79.20.0-89.550.081.80.0-70.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:RepaymentsOfLongTermDebtAndCapitalSecurities



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-30
Value78370707599879875825810659369352684856437940513944873465152164614838431556003015400
Percentage of RepaymentsOfLongTermDebtAndCapitalSecurities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:RightOfUseAssetObtainedInExchangeForFinanceLeaseLiability



Period End2020-03-312019-09-302019-06-302019-03-31
Value0.00.00.01000000.0
Percentage of RightOfUseAssetObtainedInExchangeForFinanceLeaseLiability0.00.00.0100.0

us-gaap:RightOfUseAssetObtainedInExchangeForOperatingLeaseLiability



Period End2020-03-312019-09-302019-06-302019-03-31
Value2565119
Percentage of RightOfUseAssetObtainedInExchangeForOperatingLeaseLiability100.0100.0100.0100.0

us-gaap:StockIssuedDuringPeriodValueEmployeeStockPurchasePlan



Period End2020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-31
Value29104994
Percentage of StockIssuedDuringPeriodValueEmployeeStockPurchasePlan100.0100.0100.0100.0100.0100.0100.0

us-gaap:StatementEquityComponents

us-gaap:AdditionalPaidInCapital



Period End2020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-31
Value888-1078-9
Percentage of StockIssuedDuringPeriodValueEmployeeStockPurchasePlan400.088.980.0-250.077.888.9-225.0

us-gaap:TreasuryStock



Period End2020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-31
Value6126215
Percentage of StockIssuedDuringPeriodValueEmployeeStockPurchasePlan300.011.120.0150.022.211.1125.0

us-gaap:StockIssuedDuringPeriodValueShareBasedCompensation



Period End2020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-31
Value91213139910
Percentage of StockIssuedDuringPeriodValueShareBasedCompensation100.0100.0100.0100.0100.0100.0100.0

us-gaap:StatementEquityComponents

us-gaap:AdditionalPaidInCapital



Period End2020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-31
Value91213139910
Percentage of StockIssuedDuringPeriodValueShareBasedCompensation100.0100.0100.0100.0100.0100.0100.0

us-gaap:TreasuryStockValueAcquiredCostMethod



Period End2020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-31
Value451500450500500500500
Percentage of TreasuryStockValueAcquiredCostMethod100.0100.0100.0100.0100.0100.0100.0

us-gaap:StatementEquityComponents

us-gaap:TreasuryStock



Period End2020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-31
Value451500450-500-500-500-500
Percentage of TreasuryStockValueAcquiredCostMethod100.0100.0100.0-100.0-100.0-100.0-100.0

us-gaap:UnrealizedGainLossOnDerivatives



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-31
Value-20000-27247-70426-27-30167122-88285-87-74-11
Percentage of UnrealizedGainLossOnDerivatives100.00.00.00.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DebtInstrument, us-gaap:SubsequentEventType, luv:DebtDescription

luv:AccordianFeatureonShorttermDebt

luv:Amended364DayTermLoanCreditFacility, us-gaap:SubsequentEvent, luv:AccordianFeaturetoAmended364DayTermLoanCreditFacility



Period End2020-04-24
Value417
Percentage of AccordianFeatureonShorttermDebt100.0

luv:AccrualforPropertyandIncomeTaxes



Period End2020-03-312019-12-312019-09-302018-12-31
Value67797068
Percentage of AccrualforPropertyandIncomeTaxes100.0100.0100.0100.0

luv:AirTrafficLiabilityLoyaltyProgram



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value3561338533393289317130112948291927992667
Percentage of AirTrafficLiabilityLoyaltyProgram100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

luv:AirTrafficLiabilityPassengerRevenueandAncillaryPassengerServices



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value2650212526272695284320592635261126311898
Percentage of AirTrafficLiabilityPassengerRevenueandAncillaryPassengerServices100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

luv:AirTrafficLiabilityTotal



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-31
Value62115510596659846014507055835530543045655023514251394221
Percentage of AirTrafficLiabilityTotal100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

luv:AircraftMaintenancePayable



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312012-12-31
Value15616210974676965545138333131262512875168162163170314310322336331299
Percentage of AircraftMaintenancePayable100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

luv:AssetsConstructedForOthers



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312012-12-31
Value19816417214412017681718166416071543146014041319122011501067986915823745686621570515478453331
Percentage of AssetsConstructedForOthers100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OtherCommitments

luv:AssetsConstructedForOthersNet

luv:LosAngelesWorldAirportTerminal1.5



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302017-12-31
Value198164172144120997331
Percentage of AssetsConstructedForOthersNet100.0100.0100.0100.0100.0100.0100.0100.0

luv:BusinessPartnersAndOtherSuppliers



Period End2020-03-312019-12-312018-12-31
Value535779319
Percentage of BusinessPartnersAndOtherSuppliers100.0100.0100.0

luv:ConstructionObligationNoncurrent



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312012-12-31
Value198164172144120170116581613156313901311125811751078989903825757684632595554521468450437331
Percentage of ConstructionObligationNoncurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

luv:DerivativeAssetFairValueAmountOffsetAgainstCollateralTotal



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312012-12-31
Value6049801201509533327517513684927712096141386271183145306
Percentage of DerivativeAssetFairValueAmountOffsetAgainstCollateralTotal100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:BalanceSheetLocation, us-gaap:DerivativeInstrumentRisk

us-gaap:OtherAssets, us-gaap:InterestRateSwap



Period End2020-03-312019-12-312019-09-302018-12-312017-06-302016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-31
Value0210101321162614131417182022222931
Percentage of DerivativeAssetFairValueAmountOffsetAgainstCollateralTotal0.04.11.20.01.10.00.00.00.022.2100.0100.0100.0100.016.36.39.813.80.00.00.010.1

us-gaap:BalanceSheetLocation, us-gaap:DerivativeInstrumentRisk

luv:DerivativeAssetFairValueGrossLiabilityOffset

luv:OtherAssetsCurrent, us-gaap:CommodityContract



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302012-12-31
Value11000150148128835064124813192826012240169182253101327
Percentage of DerivativeAssetFairValueGrossLiabilityOffset100.0100.00.00.0100.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OtherAssets, us-gaap:CommodityContract



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-31
Value191500001732200153451589113000871926910012038-232-367
Percentage of DerivativeAssetFairValueGrossLiabilityOffset1900.0150.00.00.00.00.011.525.024.10.023.43400.02550.0120.869.257.9107.10.00.0725.080.040.854.947.437.60.0-112.2

us-gaap:BalanceSheetLocation, us-gaap:DerivativeInstrumentRisk

luv:DerivativeAssetNoncurrentCollateralObligationToReturnCashOffset

us-gaap:OtherAssets, us-gaap:CommodityContract



Period End2020-03-312019-12-312018-09-302018-06-302018-03-312017-12-31
Value19151732200
Percentage of DerivativeAssetNoncurrentCollateralObligationToReturnCashOffset100.0100.0100.0100.0100.00.0

us-gaap:BalanceSheetLocation, us-gaap:DerivativeInstrumentRisk

luv:DerivativeLiabilityFairValueGrossAssetOffset

luv:OtherAssetsCurrent, us-gaap:CommodityContract



Period End2020-03-312019-12-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302012-12-31
Value1100148128835064124813192826012240169182253101327
Percentage of DerivativeLiabilityFairValueGrossAssetOffset100.0100.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OtherAssets, us-gaap:CommodityContract



Period End2020-03-312019-12-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-31
Value191501732200153451589113000871926910012038-232-367
Percentage of DerivativeLiabilityFairValueGrossAssetOffset1900.0150.00.011.525.024.10.023.43400.02550.0120.869.257.9107.10.00.0725.080.040.854.947.437.60.0-112.2

us-gaap:OtherNoncurrentLiabilities, us-gaap:InterestRateSwap



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302012-12-31
Value0000000000000000000000243232323389
Percentage of DerivativeLiabilityFairValueGrossAssetOffset0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0200.013.318.917.613.027.2

us-gaap:DerivativeInstrumentRisk, us-gaap:HedgingDesignation

luv:DiscontinuationofInterestRateCashFlowHedgeBalanceinAOCI

us-gaap:InterestRateSwap, us-gaap:Nondesignated



Period End2020-03-31
Value17
Percentage of DiscontinuationofInterestRateCashFlowHedgeBalanceinAOCI100.0

luv:FuelPayable



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312012-12-31
Value5712912010611912210895107123139795795665449484668598599106100102112
Percentage of FuelPayable100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:CounterpartyName, us-gaap:Range, us-gaap:DerivativeInstrumentRisk

luv:InvestmentGradeRatingFairValueOfFuelDerivativeLevelInWhichCashIsReceived

luv:CounterpartyAlpha, srt:Minimum, us-gaap:CommodityContract



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-30
Value005050505050
Percentage of InvestmentGradeRatingFairValueOfFuelDerivativeLevelInWhichCashIsReceived0.00.0100.0100.0100.0100.0100.0

luv:CounterpartyE, srt:Minimum, us-gaap:CommodityContract



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-30
Value100100100-100-100100-100
Percentage of InvestmentGradeRatingFairValueOfFuelDerivativeLevelInWhichCashIsReceived0.00.0200.0-200.0-200.0200.0-200.0

us-gaap:CounterpartyName, us-gaap:Range, us-gaap:DerivativeInstrumentRisk

luv:InvestmentGradeRatingFairValueOfFuelDerivativeLevelsInWhichCashIsProvidedThreshold1

luv:CounterpartyAlpha, srt:Minimum, us-gaap:CommodityContract



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-30
Value-100-100-50-50-50-50-50
Percentage of InvestmentGradeRatingFairValueOfFuelDerivativeLevelsInWhichCashIsProvidedThreshold1100.0100.0100.0100.0100.0100.0100.0

luv:CounterpartyE, srt:Minimum, us-gaap:CommodityContract



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-30
Value-40-40-40-40-125-125-125
Percentage of InvestmentGradeRatingFairValueOfFuelDerivativeLevelsInWhichCashIsProvidedThreshold140.040.080.080.0250.0250.0250.0

luv:CounterpartyF, srt:Minimum, us-gaap:CommodityContract



Period End2020-03-312019-09-302019-06-302019-03-312018-12-312018-09-30
Value-65-70-70-70-70-70
Percentage of InvestmentGradeRatingFairValueOfFuelDerivativeLevelsInWhichCashIsProvidedThreshold165.0140.0140.0140.0140.0140.0

us-gaap:DerivativeInstrumentRisk

luv:LettersofCreditCollateralPledgedAggregateFairValue

us-gaap:CommodityContract



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-30
Value00000000000000000000-75250000000
Percentage of LettersofCreditCollateralPledgedAggregateFairValue0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0100.0100.00.00.00.00.00.00.0

us-gaap:CreditFacility

luv:LineofCreditFacilityMaximumAmountOutstandingatPeriodEnd

us-gaap:RevolvingCreditFacility



Period End2020-03-31
Value1000
Percentage of LineofCreditFacilityMaximumAmountOutstandingatPeriodEnd100.0

us-gaap:CounterpartyName, us-gaap:Range, us-gaap:DerivativeInstrumentRisk

luv:NonInvestmentGradeRatingFairValueOfFuelDerivativeLevelsatWhichCashcollateralIsPledged

luv:CounterpartyAlpha, srt:Maximum, us-gaap:CommodityContract



Period End2020-03-31
Value-600
Percentage of NonInvestmentGradeRatingFairValueOfFuelDerivativeLevelsatWhichCashcollateralIsPledged100.0

luv:CounterpartyAlpha, srt:Minimum, us-gaap:CommodityContract



Period End2020-03-31
Value-200
Percentage of NonInvestmentGradeRatingFairValueOfFuelDerivativeLevelsatWhichCashcollateralIsPledged33.3

luv:CounterpartyC, srt:Maximum, us-gaap:CommodityContract



Period End2020-03-31
Value-550
Percentage of NonInvestmentGradeRatingFairValueOfFuelDerivativeLevelsatWhichCashcollateralIsPledged91.7

luv:CounterpartyC, srt:Minimum, us-gaap:CommodityContract



Period End2020-03-31
Value-150
Percentage of NonInvestmentGradeRatingFairValueOfFuelDerivativeLevelsatWhichCashcollateralIsPledged25.0

luv:CounterpartyD, srt:Maximum, us-gaap:CommodityContract



Period End2020-03-31
Value-550
Percentage of NonInvestmentGradeRatingFairValueOfFuelDerivativeLevelsatWhichCashcollateralIsPledged91.7

luv:CounterpartyD, srt:Minimum, us-gaap:CommodityContract



Period End2020-03-31
Value-150
Percentage of NonInvestmentGradeRatingFairValueOfFuelDerivativeLevelsatWhichCashcollateralIsPledged25.0

luv:ResidualTravelFunds



Period End2020-03-312019-12-31
Value0.330.13
Percentage of ResidualTravelFunds100.0100.0

us-gaap:SubsequentEventType

luv:TotalExpectedReceiptsofReliefThroughPayrollSupportProgramofCARESAct

us-gaap:SubsequentEvent



Period End2020-04-20
Value3300
Percentage of TotalExpectedReceiptsofReliefThroughPayrollSupportProgramofCARESAct100.0

luv:TradeReceivables



Period End2020-03-312019-12-312018-12-31
Value445357
Percentage of TradeReceivables100.0100.0100.0

us-gaap:SubsequentEventType

luv:UnsecuredTermLoanThroughPayrollSupportProgramofCARESAct

us-gaap:SubsequentEvent



Period End2020-04-21
Value459
Percentage of UnsecuredTermLoanThroughPayrollSupportProgramofCARESAct100.0

us-gaap:AccountsAndOtherReceivablesNetCurrent



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-31
Value7091086867777784568784765680662579576585546848524511474465462499365468447457419463514429332430502367299
Percentage of AccountsAndOtherReceivablesNetCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:AccountsPayableOtherCurrent



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312012-12-31
Value320521388416466526406417412569432473462535468425421442360331345358303272308323246
Percentage of AccountsPayableOtherCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:AccountsPayableTradeCurrent



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312012-12-31
Value218304270260256263266280189186165171181138148227191178170170181123189221187189174
Percentage of AccountsPayableTradeCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:AccruedEmployeeBenefitsCurrent



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312010-12-31
Value991201181109610796979510093969096908880867771728470727173626162706060565643
Percentage of AccruedEmployeeBenefitsCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:AccruedLiabilitiesCurrent



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-06-302009-12-31
Value10371749145613151350174915171361113417771593156119471985214618692472259120491651187415651277164511681229117212071004110210401142102499600827863942729
Percentage of AccruedLiabilitiesCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:AccruedSalariesCurrent



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312012-12-31
Value226231199205213216183215202201175197203200149174171173340168161160142157150156148
Percentage of AccruedSalariesCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:AccruedVacationCurrent



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-06-302009-12-31
Value44343442742141340339238337236534833933435533931731430931030229729229128728227828628127527026325825324800203200198190
Percentage of AccruedVacationCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:AdditionalPaidInCapitalCommonStock



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-06-302010-03-312009-12-312008-12-31
Value158215811554153415131510148514691452145114361422141914101402138313871374133013191329131512801263125612311205120112141210122812241225122200118611831221121812161215
Percentage of AdditionalPaidInCapitalCommonStock100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:AirlineRelatedInventory



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-31
Value51852952851048446148345943042043836535633733132828931130832630434242943543846752146148046954444643240100320243
Percentage of AirlineRelatedInventory100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FairValueByMeasurementFrequency

us-gaap:AssetsFairValueDisclosure

us-gaap:FairValueInputsLevel1, us-gaap:FairValueMeasurementsRecurring



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302017-12-31
Value50733392345135793321310133252731
Percentage of AssetsFairValueDisclosure100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:FairValueInputsLevel2, us-gaap:FairValueMeasurementsRecurring



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302017-12-31
Value658879744579702715636649
Percentage of AssetsFairValueDisclosure13.025.921.616.221.123.119.123.8

us-gaap:FairValueInputsLevel3, us-gaap:FairValueMeasurementsRecurring



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302017-12-31
Value85110114187254138698283
Percentage of AssetsFairValueDisclosure1.73.23.35.27.64.521.010.4

us-gaap:FairValueByMeasurementBasis, us-gaap:FairValueByMeasurementFrequency

us-gaap:EstimateOfFairValueFairValueDisclosure, us-gaap:FairValueMeasurementsRecurring



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302017-12-31
Value58164381430943454277395446593663
Percentage of AssetsFairValueDisclosure114.6129.2124.9121.4128.8127.5140.1134.1

us-gaap:ClassOfWarrantOrRight, us-gaap:SubsequentEventType

us-gaap:ClassOfWarrantOrRightExercisePriceOfWarrantsOrRights1

luv:LUVCommonStockWarrants, us-gaap:SubsequentEvent



Period End2020-04-09
Value36.47
Percentage of ClassOfWarrantOrRightExercisePriceOfWarrantsOrRights1100.0

us-gaap:CounterpartyName, us-gaap:DerivativeInstrumentRisk

us-gaap:CollateralAlreadyPostedAggregateFairValue

luv:CounterpartyAlpha, us-gaap:CommodityContract



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-09-30
Value2025001501651558018
Percentage of CollateralAlreadyPostedAggregateFairValue100.0100.00.00.0100.00.0100.0100.0100.0100.0

luv:CounterpartyE, us-gaap:CommodityContract



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-09-30
Value000000000-4
Percentage of CollateralAlreadyPostedAggregateFairValue0.00.00.00.00.00.00.00.00.0-22.2

us-gaap:DerivativeInstrumentRisk

us-gaap:CommodityContract



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-09-302016-06-302016-03-312015-09-302015-06-302015-03-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-31
Value20250015016515580151416526360571910674786602830-105-10006500-13-265-85-226
Percentage of CollateralAlreadyPostedAggregateFairValue100.0100.00.00.0100.00.0100.0100.0100.00.077.80.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:ContractWithCustomerLiabilityCurrent



Period End2020-03-312019-12-31
Value50364457
Percentage of ContractWithCustomerLiabilityCurrent100.0100.0

us-gaap:ContractWithCustomerLiabilityNoncurrent



Period End2020-03-312019-12-31
Value11751053
Percentage of ContractWithCustomerLiabilityNoncurrent100.0100.0

us-gaap:CreditCardReceivables



Period End2020-03-312019-12-312018-12-31
Value4112107
Percentage of CreditCardReceivables100.0100.0100.0

us-gaap:DeferredCompensationCashBasedArrangementsLiabilityCurrent



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312009-12-31
Value256954232821255804322991325794503257106455173847986555063194913742683912672441732221441351141781041100017017146
Percentage of DeferredCompensationCashBasedArrangementsLiabilityCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DeferredGainLossOnDiscontinuationOfInterestRateFairValueHedge



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value18191919202020202122
Percentage of DeferredGainLossOnDiscontinuationOfInterestRateFairValueHedge100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DeferredIncomeTaxLiabilitiesNet



Period End2020-03-312019-12-31
Value22782364
Percentage of DeferredIncomeTaxLiabilitiesNet100.0100.0

us-gaap:DeferredRevenue



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-31
Value35613385333932893171301129482919279926672582258625602485
Percentage of DeferredRevenue100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DepositsOnFlightEquipment



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-31
Value3052489338187807758208589139191118120712081190111311841202108969265861956660168876276469063359441644642044445600172230
Percentage of DepositsOnFlightEquipment100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:BalanceSheetLocation, us-gaap:HedgingDesignation

us-gaap:DerivativeAmountOfHedgedItem

us-gaap:LongTermDebt, us-gaap:DesignatedAsHedgingInstrument



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value00501500495791783783784793
Percentage of DerivativeAmountOfHedgedItem0.00.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ShortTermDebt, us-gaap:DesignatedAsHedgingInstrument



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-30
Value504500300300300000
Percentage of DerivativeAmountOfHedgedItem0.00.059.960.060.60.00.00.0

us-gaap:BalanceSheetLocation, us-gaap:HedgingDesignation, luv:HedgeAdjustment

us-gaap:LongTermDebt, us-gaap:DesignatedAsHedgingInstrument, luv:Cumulativefairvalueadjustment



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-30
Value1819181813534
Percentage of DerivativeAmountOfHedgedItem0.00.03.63.62.60.60.40.5

us-gaap:ShortTermDebt, us-gaap:DesignatedAsHedgingInstrument, luv:Cumulativefairvalueadjustment



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-30
Value40212000
Percentage of DerivativeAmountOfHedgedItem0.00.00.40.20.40.00.00.0

us-gaap:HedgingDesignation

us-gaap:DesignatedAsHedgingInstrument



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-30
Value504500801800795784783783
Percentage of DerivativeAmountOfHedgedItem0.00.0159.9160.0160.699.1100.0100.0

us-gaap:HedgingDesignation, luv:HedgeAdjustment

us-gaap:DesignatedAsHedgingInstrument, luv:Cumulativefairvalueadjustment



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-30
Value2219201915534
Percentage of DerivativeAmountOfHedgedItem0.00.04.03.83.00.60.40.5

us-gaap:BalanceSheetLocation, us-gaap:DerivativeInstrumentRisk

us-gaap:DerivativeAssetCollateralObligationToReturnCashOffset

luv:OtherAssetsCurrent, us-gaap:CommodityContract



Period End2020-03-312019-12-312019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value1101501481236015
Percentage of DerivativeAssetCollateralObligationToReturnCashOffset100.0100.0100.00.0100.0100.0100.0100.0

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

us-gaap:DerivativeAssetFairValueGrossLiability

luv:OtherAssetsCurrent, us-gaap:CommodityContract, us-gaap:DesignatedAsHedgingInstrument



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312014-12-31
Value000000000036004400000
Percentage of DerivativeAssetFairValueGrossLiability0.00.00.00.00.00.00.00.00.00.0100.00.00.0100.00.00.00.00.00.0

luv:OtherAssetsCurrent, us-gaap:CommodityContract, us-gaap:Nondesignated



Period End2020-03-312019-12-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312014-12-31
Value0000523352500071019260
Percentage of DerivativeAssetFairValueGrossLiability0.00.00.00.00.00.00.069.40.00.00.00.00.00.00.00.0

us-gaap:OtherAssets, us-gaap:CommodityContract, us-gaap:DesignatedAsHedgingInstrument



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312014-12-31
Value00000000000000002600
Percentage of DerivativeAssetFairValueGrossLiability0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:BalanceSheetLocation, us-gaap:DerivativeInstrumentRisk

us-gaap:DerivativeAssetNotSubjectToMasterNettingArrangement

luv:OtherAssetsCurrent, us-gaap:CommodityContract



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302012-12-31
Value64835671044334829416814764246113193041024306212249303375
Percentage of DerivativeAssetNotSubjectToMasterNettingArrangement100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0100.0100.0100.0100.0100.0100.0

luv:OtherAssetsCurrent, us-gaap:InterestRateSwap



Period End2020-03-312019-12-31
Value40
Percentage of DerivativeAssetNotSubjectToMasterNettingArrangement66.70.0

us-gaap:OtherAssets, us-gaap:CommodityContract



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302012-12-31
Value796279120150953503071951369912512817811114570159446234225178588
Percentage of DerivativeAssetNotSubjectToMasterNettingArrangement1316.7129.2225.7179.1144.2220.9100.6104.4116.192.5154.76250.03200.0291.884.657.9150.017.10.0662.5145.8110.490.458.7156.8

us-gaap:OtherAssets, us-gaap:InterestRateSwap



Period End2020-03-312019-12-312019-09-302018-12-312017-06-302016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302012-12-31
Value021010132116261413141718202231
Percentage of DerivativeAssetNotSubjectToMasterNettingArrangement0.04.22.90.050.00.0100.0110.553.34.90.00.00.00.058.35.68.58.07.38.3

us-gaap:BalanceSheetLocation, us-gaap:DerivativeInstrumentRisk

us-gaap:DerivativeFairValueAmountOffsetAgainstCollateralNet

luv:OtherAssetsCurrent, us-gaap:CommodityContract



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302016-12-31
Value538356789432001668597013
Percentage of DerivativeFairValueAmountOffsetAgainstCollateralNet100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0100.0

luv:OtherAssetsCurrent, us-gaap:InterestRateSwap



Period End2020-03-312019-12-31
Value40
Percentage of DerivativeFairValueAmountOffsetAgainstCollateralNet80.00.0

us-gaap:OtherAssets, us-gaap:CommodityContract



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302016-12-31
Value6047791201509533327517513684120
Percentage of DerivativeFairValueAmountOffsetAgainstCollateralNet1200.0123.7225.7179.1168.5220.9166.5165.7205.9140.20.0923.1

us-gaap:CounterpartyName, us-gaap:DerivativeInstrumentRisk

us-gaap:DerivativeFairValueOfDerivativeAssetAmountNotOffsetAgainstCollateral

luv:CounterpartyAlpha, us-gaap:CommodityContract



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value-2322-25-46-6838-222-202-116
Percentage of DerivativeFairValueOfDerivativeAssetAmountNotOffsetAgainstCollateral100.0100.0100.0100.0100.0100.0100.0100.0100.0

luv:CounterpartyB, us-gaap:CommodityContract



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value-1016-18-32-5223-156-117-67
Percentage of DerivativeFairValueOfDerivativeAssetAmountNotOffsetAgainstCollateral43.572.772.069.676.560.570.357.957.8

luv:CounterpartyC, us-gaap:CommodityContract



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-09-30
Value-2036-35-59-7343-161-139-77-16
Percentage of DerivativeFairValueOfDerivativeAssetAmountNotOffsetAgainstCollateral87.0163.6140.0128.3107.4113.272.568.866.40.0

luv:CounterpartyD, us-gaap:CommodityContract



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-09-30
Value-812-12-16-2212-67-57-39-10
Percentage of DerivativeFairValueOfDerivativeAssetAmountNotOffsetAgainstCollateral34.854.548.034.832.431.630.228.233.60.0

luv:CounterpartyE, us-gaap:CommodityContract



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-09-30
Value-98-9-11-125-26-25-17-4
Percentage of DerivativeFairValueOfDerivativeAssetAmountNotOffsetAgainstCollateral39.136.436.023.917.613.211.712.414.70.0

luv:CounterpartyF, us-gaap:CommodityContract



Period End2020-03-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-09-30
Value-8-7-10-1310-37-31-11-3
Percentage of DerivativeFairValueOfDerivativeAssetAmountNotOffsetAgainstCollateral34.828.021.719.126.316.715.39.50.0

luv:CounterpartyOther, us-gaap:CommodityContract



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-09-30
Value-716-8-13-147-29-25-13-2
Percentage of DerivativeFairValueOfDerivativeAssetAmountNotOffsetAgainstCollateral30.472.732.028.320.618.413.112.411.20.0

us-gaap:DerivativeInstrumentRisk

us-gaap:CommodityContract



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value-85110-114-187-254138-698-596-340248
Percentage of DerivativeFairValueOfDerivativeAssetAmountNotOffsetAgainstCollateral369.6500.0456.0406.5373.5363.2314.4295.0293.10.0

us-gaap:BalanceSheetLocation, us-gaap:DerivativeInstrumentRisk

us-gaap:DerivativeFairValueOfDerivativeLiabilityAmountOffsetAgainstCollateral

us-gaap:AccruedLiabilities, us-gaap:InterestRateSwap



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value55520371520111
Percentage of DerivativeFairValueOfDerivativeLiabilityAmountOffsetAgainstCollateral100.0100.0100.0100.0100.0100.00.0100.0100.0100.0

us-gaap:OtherNoncurrentLiabilities, us-gaap:InterestRateSwap



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302016-12-31
Value16140812222324212135
Percentage of DerivativeFairValueOfDerivativeLiabilityAmountOffsetAgainstCollateral29.120.020.00.053.3600.00.02300.02400.02100.00.00.0

us-gaap:BalanceSheetLocation, us-gaap:DerivativeInstrumentRisk

us-gaap:DerivativeLiabilityNotSubjectToMasterNettingArrangement

luv:OtherAssetsCurrent, us-gaap:CommodityContract



Period End2020-03-312019-12-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302012-12-31
Value1100148128835064124813192826012240169182253327
Percentage of DerivativeLiabilityNotSubjectToMasterNettingArrangement100.0100.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0100.0100.0100.0100.0100.0100.0

us-gaap:AccruedLiabilities, us-gaap:InterestRateSwap



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value55520371520111
Percentage of DerivativeLiabilityNotSubjectToMasterNettingArrangement5500.050.00.00.00.00.00.00.81.22.0

us-gaap:OtherAssets, us-gaap:CommodityContract



Period End2020-03-312019-12-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302012-12-31
Value1915017322001534515891130008719269100120367
Percentage of DerivativeLiabilityNotSubjectToMasterNettingArrangement1900.0150.00.011.525.024.10.023.43400.02550.0120.869.257.9107.10.00.0725.080.040.854.947.4112.2

us-gaap:OtherNoncurrentLiabilities, us-gaap:InterestRateSwap



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302012-12-31
Value16140812222324212124303536444649545461616172737787126
Percentage of DerivativeLiabilityNotSubjectToMasterNettingArrangement1600.010.00.00.00.00.014.918.028.942.032.82400.01500.072.9276.9231.6164.3188.50.00.00.00.0508.330.043.242.334.438.5

luv:VolumeOfFuelHedging

us-gaap:DerivativeNonmonetaryNotionalAmount

luv:CurrentYear



Period End2020-03-312019-09-30
Value976344
Percentage of DerivativeNonmonetaryNotionalAmount100.0100.0

luv:NextYear



Period End2020-03-312019-12-312019-09-30
Value128313011301
Percentage of DerivativeNonmonetaryNotionalAmount131.50.0378.2

luv:YearThree



Period End2020-03-312019-09-30
Value529552
Percentage of DerivativeNonmonetaryNotionalAmount54.2160.5

luv:YearTwo



Period End2020-03-312019-12-312019-09-30
Value93011691169
Percentage of DerivativeNonmonetaryNotionalAmount95.30.0339.8

us-gaap:DividendsPayableCurrentAndNoncurrent



Period End2020-03-312019-12-31
Value093
Percentage of DividendsPayableCurrentAndNoncurrent0.0100.0

luv:FairValueAssetsAndLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliation

us-gaap:FairValueMeasurementWithUnobservableInputsReconciliationsRecurringBasisLiabilityValue

us-gaap:CommodityContract



Period End2020-03-312018-12-312018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-31
Value85138596340248-5233304258681907148116761369105512451091
Percentage of FairValueMeasurementWithUnobservableInputsReconciliationsRecurringBasisLiabilityValue100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FairValueByMeasurementFrequency

us-gaap:FinancialInstrumentsOwnedUSGovernmentAndAgencyObligationsAtFairValue

us-gaap:FairValueInputsLevel1, us-gaap:FairValueMeasurementsRecurring



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-31
Value13961196119512911289158214881340114414911344134513471345119810989681248114911501150145015001880152015701760166015601624
Percentage of FinancialInstrumentsOwnedUSGovernmentAndAgencyObligationsAtFairValue100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:FairValueByMeasurementBasis, us-gaap:FairValueByMeasurementFrequency

us-gaap:EstimateOfFairValueFairValueDisclosure, us-gaap:FairValueMeasurementsRecurring



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302015-12-31
Value13961196119512911289158214881340114414911344134513471345119810981248
Percentage of FinancialInstrumentsOwnedUSGovernmentAndAgencyObligationsAtFairValue100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:FlightEquipmentGross



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-31
Value21580216292173621707216662175321409210842114321368210042050620348202751997819972197351946219244191481885818473180191759217107169371678516707166431636716177159521560015542001409013991
Percentage of FlightEquipmentGross100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:IncomeTaxesReceivable



Period End2020-03-312019-12-312018-12-31
Value888722
Percentage of IncomeTaxesReceivable100.0100.0100.0

us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FairValueByMeasurementFrequency

us-gaap:InterestRateDerivativeAssetsAtFairValue

us-gaap:FairValueInputsLevel2, us-gaap:FairValueMeasurementsRecurring



Period End2020-03-312019-12-312019-09-302017-06-302016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-31
Value42111321162614131417182022222931
Percentage of InterestRateDerivativeAssetsAtFairValue100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:FairValueByMeasurementBasis, us-gaap:FairValueByMeasurementFrequency

us-gaap:EstimateOfFairValueFairValueDisclosure, us-gaap:FairValueMeasurementsRecurring



Period End2020-03-312019-12-312019-09-302017-06-302016-09-302016-06-302015-12-31
Value421113212
Percentage of InterestRateDerivativeAssetsAtFairValue100.0100.0100.0100.0100.0100.0100.0

us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FairValueByMeasurementFrequency

us-gaap:InterestRateDerivativeLiabilitiesAtFairValue

us-gaap:FairValueInputsLevel2, us-gaap:FairValueMeasurementsRecurring



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-31
Value7162437231422242522212430353644464954546161617273778790115126
Percentage of InterestRateDerivativeLiabilitiesAtFairValue100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:FairValueByMeasurementBasis, us-gaap:FairValueByMeasurementFrequency

us-gaap:EstimateOfFairValueFairValueDisclosure, us-gaap:FairValueMeasurementsRecurring



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302015-12-31
Value716243723142224252221243035364449
Percentage of InterestRateDerivativeLiabilitiesAtFairValue100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DebtInstrument, us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:LongtermDebtType

us-gaap:LoansPayableFairValueDisclosure

luv:Debenturesdue2027Domain, us-gaap:FairValueInputsLevel2, us-gaap:UnsecuredDebt



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value139150152150148146145148151154
Percentage of LoansPayableFairValueDisclosure100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

luv:TermLoanAgreementDue2020, us-gaap:FairValueInputsLevel3, us-gaap:NotesPayableToBanks



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-31
Value120134147161174187200212225240252261273284291299313323337347356367378378380388396402410
Percentage of LoansPayableFairValueDisclosure86.389.396.7107.3117.6128.1137.9143.2149.0155.80.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

luv:TermLoanAgreementDue2021, us-gaap:FairValueInputsLevel3, us-gaap:NotesPayableToBanks



Period End2020-03-312017-06-302017-03-312016-12-312016-09-30
Value99018192222
Percentage of LoansPayableFairValueDisclosure712.20.00.00.00.0

luv:TermLoanAgreementDue2026, us-gaap:FairValueInputsLevel3, us-gaap:NotesPayableToBanks



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-31
Value164178188188197197206206215215215215215215
Percentage of LoansPayableFairValueDisclosure118.0118.7123.7125.3133.1134.9142.1139.2142.4139.60.00.00.00.0

us-gaap:LongTermDebtAndCapitalLeaseObligations



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312012-12-31
Value228818462398244926022771310031553227332027632788278128212323239123552541238124112416243421252153217221912883
Percentage of LongTermDebtAndCapitalLeaseObligations100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:LongTermDebtAndCapitalLeaseObligationsCurrent



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312012-12-31
Value2795819637654571606346365365348316307285566972963953637287276271258607605642629271
Percentage of LongTermDebtAndCapitalLeaseObligationsCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DebtInstrument, us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:LongtermDebtType

us-gaap:NotesPayableFairValueDisclosure

luv:NotesPayableAircraftFloatingRateThrough2020, us-gaap:FairValueInputsLevel3, us-gaap:NotesPayableToBanks



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-31
Value7202124446799121144154165182193204213233242253261275282293302322324335343352381
Percentage of NotesPayableFairValueDisclosure100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

luv:TotalPassThroughCertificates, us-gaap:FairValueInputsLevel2, us-gaap:EnhancedEquipmentTrustCertificate



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-31
Value167208208237236263264289293318322343345362362378374382380395400410423420420418423440452
Percentage of NotesPayableFairValueDisclosure2385.71040.0990.5987.5536.4392.5266.7238.8203.5206.5195.2188.5178.8177.5170.0162.2154.5151.0145.6143.6141.8139.9140.1130.4129.6124.8123.3125.0118.6

luv:UnsecuredSeniorNotesDue2020, us-gaap:FairValueInputsLevel2, us-gaap:UnsecuredDebt



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-31
Value495503504502494486480480483494503502497493521528526493
Percentage of NotesPayableFairValueDisclosure7071.42515.02400.02091.71122.7725.4484.8396.7335.4320.8304.8275.8257.5241.7244.6226.6217.4194.9

luv:UnsecuredSeniorNotesDue2022Domain, us-gaap:FairValueInputsLevel2, us-gaap:UnsecuredDebt



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value283304304302299293290292295300
Percentage of NotesPayableFairValueDisclosure4042.91520.01447.61258.3679.5437.3292.9241.3204.9194.8

luv:UnsecuredSeniorNotesDue2026, us-gaap:FairValueInputsLevel2, us-gaap:UnsecuredDebt



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-31
Value284308307301290279276277284293296291285284
Percentage of NotesPayableFairValueDisclosure4057.11540.01461.91254.2659.1416.4278.8228.9197.2190.3179.4159.9147.7139.2

luv:UnsecuredSeniorNotesDue2027, us-gaap:FairValueInputsLevel2, us-gaap:UnsecuredDebt



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value264317315308298286283284292299
Percentage of NotesPayableFairValueDisclosure3771.41585.01500.01283.3677.3426.9285.9234.7202.8194.2

luv:UnsecuredSeniorNotesDue2030, us-gaap:FairValueInputsLevel2, us-gaap:UnsecuredDebt



Period End2020-03-31
Value420
Percentage of NotesPayableFairValueDisclosure6000.0

us-gaap:OperatingLeaseLiabilityCurrent



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-31
Value3303533323503610
Percentage of OperatingLeaseLiabilityCurrent100.0100.0100.0100.0100.00.0

us-gaap:OperatingLeaseLiabilityNoncurrent



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-31
Value9369781014107211500
Percentage of OperatingLeaseLiabilityNoncurrent100.0100.0100.0100.0100.00.0

us-gaap:OtherAssets



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302010-12-31
Value62057765369372572010321021959786843929849774690714733717687649623534619877772530418384583633619513641626000
Percentage of OtherAssets100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FairValueByMeasurementFrequency

us-gaap:OtherAssetsFairValueDisclosure

us-gaap:FairValueInputsLevel1, us-gaap:FairValueMeasurementsRecurring



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-31
Value18219717817216212714112812210710197828380786366626761636259565853504944
Percentage of OtherAssetsFairValueDisclosure100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:FairValueInputsLevel3, us-gaap:FairValueMeasurementsRecurring



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-31
Value0000000000000016262627000555555555
Percentage of OtherAssetsFairValueDisclosure0.00.00.00.00.00.00.00.00.00.00.00.00.00.020.033.341.340.90.00.00.07.98.18.58.98.69.410.010.211.4

us-gaap:FairValueByMeasurementBasis, us-gaap:FairValueByMeasurementFrequency

us-gaap:EstimateOfFairValueFairValueDisclosure, us-gaap:FairValueMeasurementsRecurring



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302015-12-31
Value1821971781721621271411281221071019782839610493
Percentage of OtherAssetsFairValueDisclosure100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0120.0133.3140.9

us-gaap:OtherAssetsMiscellaneous



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302010-12-31
Value264232212207197164174178172161151149131138225235232213172134109123131198180175157158153148139149157121000
Percentage of OtherAssetsMiscellaneous100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OtherDeferredCompensationArrangementsLiabilityClassifiedNoncurrent



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312011-12-31
Value286313288282272247260247241237225218195204195190168179171172164174167160156163153147144141125
Percentage of OtherDeferredCompensationArrangementsLiabilityClassifiedNoncurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OtherReceivablesNetCurrent



Period End2020-03-312019-12-312018-12-31
Value385563
Percentage of OtherReceivablesNetCurrent100.0100.0100.0

us-gaap:OtherSundryLiabilitiesNoncurrent



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-31
Value11410511111710111111664717681951027882808898107333744526561115727981128275273275290
Percentage of OtherSundryLiabilitiesNoncurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:PropertyPlantAndEquipmentOther



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-31
Value58185672544652285082496047694626450643994219408539083779360034353308321930662972289928532866279227162666296328832754271426712570250724230021532122
Percentage of PropertyPlantAndEquipmentOther100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DebtInstrument

us-gaap:ShortTermBorrowings

luv:A364DayTermLoanCreditFacility



Period End2020-03-31
Value1000
Percentage of ShortTermBorrowings100.0

luv:TotalFundsOutstandingAmended364DayTermLoanCreditFacility



Period End2020-03-31
Value3300
Percentage of ShortTermBorrowings330.0

us-gaap:DebtInstrument, us-gaap:ShortTermDebtType

luv:TermLoanAgreementDue2021, us-gaap:NotesPayableToBanks



Period End2020-03-31
Value1000
Percentage of ShortTermBorrowings100.0

us-gaap:DebtInstrument, us-gaap:SubsequentEventType

luv:Amended364DayTermLoanCreditFacility, us-gaap:SubsequentEvent



Period End2020-04-282020-04-01
Value36802300
Percentage of ShortTermBorrowings0.00.0

us-gaap:DebtInstrument, us-gaap:SubsequentEventType, luv:DebtDescription

luv:Amended364DayTermLoanCreditFacility, us-gaap:SubsequentEvent, luv:AccordianFeaturetoAmended364DayTermLoanCreditFacility



Period End2020-04-24
Value350
Percentage of ShortTermBorrowings0.0

us-gaap:StatementEquityComponents

us-gaap:StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest

luv:AccumulatedNetGainLossFromDesignatedOrQualifyingCashFlowHedgesInterestRateDerivative



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302015-12-312014-12-31
Value-75-33-53-33-140-1-2-4-7-11-13-15-18-26-32-30-45
Percentage of StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest100.0100.0100.0100.0100.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

luv:OtherComprehensiveIncomeOtherChangesNetOfTax



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302014-12-312013-12-31
Value2259474539254336333326222020116663888
Percentage of StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest-29.3-178.8-88.7-136.4-278.60.0-4300.0-1800.0-825.0-471.4-236.4-169.2-133.3-111.1-42.3-18.80.0-20.00.00.0-17.80.0

us-gaap:AccumulatedDefinedBenefitPlansAdjustment



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312014-12-312013-12-31
Value202058585858-9-9-9-9-14-14-14-14222222224165
Percentage of StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest-26.7-60.6-109.4-175.8-414.30.0900.0450.0225.0128.6127.3107.793.377.8-84.6-68.80.0-73.3-91.10.0

us-gaap:AccumulatedNetGainLossFromDesignatedOrQualifyingCashFlowHedges



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302015-12-312014-12-31
Value-209-125-135-3142-56504365833-216-412-485-499-799-993-1666-1177
Percentage of StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest278.7378.8254.793.9-300.00.0-50400.0-18250.0-2075.0-42.91963.63169.23233.32772.23073.13103.15553.32615.6

us-gaap:AccumulatedNetUnrealizedInvestmentGainLoss



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302015-12-312014-12-31
Value561820-9-29-7-125-92-25-879154182188293369617435
Percentage of StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest-74.7-54.5-37.727.3207.10.012500.04600.0625.0114.3-718.2-1184.6-1213.3-1044.4-1126.9-1153.1-2056.7-966.7

us-gaap:AociIncludingPortionAttributableToNoncontrollingInterest



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302014-12-312013-12-31
Value-186-61-633096204122987812-136-263-312-323-499-628-894-1051-903-664-738-3
Percentage of StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest248.0184.8118.9-90.9-685.70.0-41200.0-14900.0-1950.0-171.41236.42023.12080.01794.41919.21962.50.03503.30.00.01640.00.0

us-gaap:WorkersCompensationLiabilityCurrent



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-06-302009-12-31
Value16816616916916816616617017317217417518418317918819118718117016616516016216216115815615815915516316616200144142135130
Percentage of WorkersCompensationLiabilityCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Line plots across dimensions of each concept

us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:ProductOrService


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


us-gaap:ComprehensiveIncomeNetOfTax us-gaap:StatementEquityComponents


us-gaap:StockholdersEquity us-gaap:StatementEquityComponents


us-gaap:StockholdersEquity us-gaap:StatementEquityComponents