DAL


Line plots across dimensions of each concept
Tables

Table of contents


us-gaap:StatementEquityComponents
us-gaap:SharesIssued

us-gaap:CommonStockSharesIssued

us-gaap:WeightedAverageNumberOfDilutedSharesOutstanding

us-gaap:WeightedAverageNumberOfSharesOutstandingBasic

us-gaap:EarningsPerShareBasic

us-gaap:EarningsPerShareDiluted

us-gaap:Revenues

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

us-gaap:CostsAndExpenses

us-gaap:SellingAndMarketingExpense

us-gaap:OperatingIncomeLoss
us-gaap:ConsolidationItems, us-gaap:StatementBusinessSegments

us-gaap:OtherNonoperatingIncomeExpense

us-gaap:IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest

us-gaap:NonoperatingIncomeExpense

us-gaap:IncomeTaxExpenseBenefit

us-gaap:ComprehensiveIncomeNetOfTax

us-gaap:NetIncomeLoss
us-gaap:StatementEquityComponents

us-gaap:Assets
us-gaap:ConsolidationItems, us-gaap:StatementBusinessSegments

us-gaap:LiabilitiesAndStockholdersEquity

us-gaap:StockholdersEquity
us-gaap:StatementEquityComponents

us-gaap:AssetsCurrent

us-gaap:CashAndCashEquivalentsAtCarryingValue

us-gaap:ReceivablesNetCurrent

us-gaap:InventoryFinishedGoods

us-gaap:PrepaidExpenseAndOtherAssetsCurrent

us-gaap:Goodwill

us-gaap:IntangibleAssetsNetExcludingGoodwill

us-gaap:OtherAssetsNoncurrent

us-gaap:LiabilitiesCurrent

us-gaap:LongTermDebtCurrent

us-gaap:AccountsPayableCurrent

us-gaap:OtherAccruedLiabilitiesCurrent

us-gaap:LiabilitiesNoncurrent

us-gaap:LongTermDebt

us-gaap:LongTermDebtNoncurrent

us-gaap:PensionAndOtherPostretirementDefinedBenefitPlansLiabilitiesNoncurrent
us-gaap:RetirementPlanType

us-gaap:OtherLiabilitiesNoncurrent

us-gaap:StockholdersEquity
us-gaap:StatementEquityComponents

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:StatementEquityComponents

us-gaap:DepreciationDepletionAndAmortization
us-gaap:ConsolidationItems
us-gaap:ConsolidationItems, us-gaap:StatementBusinessSegments

us-gaap:NetCashProvidedByUsedInInvestingActivities

us-gaap:NetCashProvidedByUsedInFinancingActivities

us-gaap:ProceedsFromIssuanceOfLongTermDebt

us-gaap:PaymentsOfDividends

us-gaap:PaymentsOfDividends

us-gaap:PaymentsForRepurchaseOfCommonStock

us-gaap:DeferredTaxLiabilities

us-gaap:DeferredTaxAssetsNet

us-gaap:DeferredTaxAssetsValuationAllowance

us-gaap:OperatingLeaseRightOfUseAsset

us-gaap:CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents

dal:AncillaryBusinessesAndRefineryExpenses
us-gaap:StatementScenario
dal:ExpectedYearOverYearDecreaseInSystemCapacityPercentage
us-gaap:StatementScenario, us-gaap:AirlineDestinations

dal:LoyaltyProgramLiabilityMileageCreditsEarned

dal:LoyaltyProgramLiabilityNonTravelMileageCreditsRedeemed

dal:LoyaltyProgramLiabilityTravelMileageCreditsRedeemed
us-gaap:AircraftType, us-gaap:CounterpartyName
dal:NumberOfAircraftAssumed
us-gaap:AircraftType, us-gaap:CounterpartyName, us-gaap:UnrecordedUnconditionalPurchaseObligationByCategoryOfItemPurchased

dal:NumberOfAircraftRemovedFromActiveService
us-gaap:StatementScenario

dal:OperatingLeaseObligationIncurred

dal:SalesOfMileageCredits
us-gaap:StatementEquityComponents
dal:StockholdersEquityIncreaseDecreaseFromCommonStockIssuedAndCompensationExpenseFromEquityAwardsNetOfTreasurySharesWithheldForTaxesShares

dal:StockholdersEquityIncreaseDecreaseFromCommonStockIssuedAndCompensationExpenseFromEquityAwardsNetOfTreasurySharesWithheldForTaxesValue
us-gaap:StatementEquityComponents

dal:WeightedAveragePricePerTreasuryShareWithheldForTaxes

us-gaap:AircraftMaintenanceMaterialsAndRepairs

us-gaap:AircraftRental

us-gaap:AirlineCapacityPurchaseArrangements

us-gaap:CapitalLeaseObligationsIncurred

us-gaap:CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect

us-gaap:CommonStockDividendsPerShareDeclared

us-gaap:CostOfServicesCatering
us-gaap:RetirementPlanType
us-gaap:DefinedBenefitPlanAmortizationOfGainsLosses
us-gaap:RetirementPlanType
us-gaap:DefinedBenefitPlanAmortizationOfPriorServiceCostCredit
us-gaap:RetirementPlanType
us-gaap:DefinedBenefitPlanExpectedReturnOnPlanAssets
us-gaap:RetirementPlanType
us-gaap:DefinedBenefitPlanInterestCost
us-gaap:RetirementPlanType
us-gaap:DefinedBenefitPlanNetPeriodicBenefitCost
us-gaap:RetirementPlanType
us-gaap:DefinedBenefitPlanRecognizedNetGainLossDueToSettlements1
us-gaap:RetirementPlanType
us-gaap:DefinedBenefitPlanServiceCost
us-gaap:DerivativeInstrumentRisk, us-gaap:HedgingDesignation, us-gaap:IncomeStatementLocation
us-gaap:DerivativeGainLossOnDerivativeNet
us-gaap:HedgingDesignation
us-gaap:DerivativeInstrumentRisk, us-gaap:HedgingDesignation
us-gaap:DerivativeNonmonetaryNotionalAmountVolume

us-gaap:Dividends
us-gaap:StatementEquityComponents

us-gaap:FuelCosts

us-gaap:GainLossOnInvestments

us-gaap:IncrementalCommonSharesAttributableToShareBasedPaymentArrangements
us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName, us-gaap:IndefiniteLivedIntangibleAssetsByMajorClass
us-gaap:IndefinitelivedIntangibleAssetsAcquired

us-gaap:InterestIncomeExpenseNet
us-gaap:ConsolidationItems, us-gaap:StatementBusinessSegments

us-gaap:LaborAndRelatedExpense

us-gaap:LandingFeesAndOtherRentals

us-gaap:OtherComprehensiveIncomeLossBeforeReclassificationsNetOfTax
us-gaap:StatementEquityComponents

us-gaap:OtherComprehensiveIncomeLossNetOfTax
us-gaap:StatementEquityComponents

us-gaap:OtherComprehensiveIncomeLossTax

us-gaap:OtherCostAndExpenseOperating

us-gaap:OtherLaborRelatedExpenses

us-gaap:PaymentsForFlightEquipment

us-gaap:PaymentsForProceedsFromOtherInvestingActivities

us-gaap:PaymentsToAcquireLongtermInvestments
us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName

us-gaap:PaymentsToAcquireOtherProductiveAssets

us-gaap:PaymentsToAcquireProductiveAssets
us-gaap:ConsolidationItems, us-gaap:StatementBusinessSegments
us-gaap:LongtermDebtType
us-gaap:ProceedsFromLinesOfCredit

us-gaap:ProceedsFromPaymentsForOtherFinancingActivities

us-gaap:ProceedsFromSaleMaturityAndCollectionOfShorttermInvestments

us-gaap:ProceedsFromShortTermDebt

us-gaap:ProfessionalAndContractServicesExpense

us-gaap:ReclassificationFromAccumulatedOtherComprehensiveIncomeCurrentPeriodNetOfTax
us-gaap:StatementEquityComponents

us-gaap:ReclassificationFromAociCurrentPeriodTax

us-gaap:RepaymentsOfLongTermDebtAndCapitalSecurities

us-gaap:RightOfUseAssetObtainedInExchangeForFinanceLeaseLiability

us-gaap:RightOfUseAssetObtainedInExchangeForOperatingLeaseLiability
us-gaap:StatementEquityComponents
us-gaap:StockRepurchasedAndRetiredDuringPeriodShares

us-gaap:StockRepurchasedAndRetiredDuringPeriodValue
us-gaap:StatementEquityComponents

dal:AirlineRelatedInventoryAircraftPartsAndSuppliesNet
us-gaap:BalanceSheetLocation
dal:CarryingAmountOfHedgedInstrumentsFairValueHedgeNet

dal:DebtLongTermAndShortTermCombinedAmountFairValue

dal:DebtLongTermAndShortTermCombinedAmountGross

dal:DebtLongTermDebtCurrentAndShortTermDebt

dal:DeferredTaxAssetsOperatingLeaseLiabilities

dal:DeferredTaxLiabilitiesOperatingLeaseRightOfUseAssets

dal:EquitySecuritiesAndEquityMethodInvestments
dal:EquitySecuritiesInvestmentName
dal:EquitySecuritiesFVNIOwnershipPercentage
us-gaap:IndefiniteLivedIntangibleAssetsByMajorClass
dal:IndefiniteLivedIntangibleAssetPercentageOfFairValueInExcessOfCarryingAmount
us-gaap:Range, us-gaap:IndefiniteLivedIntangibleAssetsByMajorClass

dal:IndefiniteLivedIntangibleAssetsAndGoodwill

dal:LeaseLiability

dal:LeaseRightofUseAsset
us-gaap:AircraftType, us-gaap:CounterpartyName
dal:NumberOfAircraftAcquiredPlanned
us-gaap:AircraftType, us-gaap:CounterpartyName, us-gaap:UnrecordedUnconditionalPurchaseObligationByCategoryOfItemPurchased
us-gaap:AircraftType, us-gaap:CounterpartyName
dal:NumberOfAircraftCommitmentsToBeAssumed

dal:PropertyPlantAndEquipmentAndFinanceLeaseRightOfUseAssetAccumulatedDepreciationAndAmortization
us-gaap:PropertyPlantAndEquipmentByType

dal:PropertyPlantAndEquipmentAndFinanceLeaseRightOfUseAssetAfterAccumulatedDepreciationAndAmortization
us-gaap:PropertyPlantAndEquipmentByType
dal:PropertyPlantAndEquipmentAndFinanceLeaseRightOfUseAssetBeforeAccumulatedDepreciationAndAmortization

dal:ShortTermDebtLongTermDebtCurrentMaturitiesAndFinanceLeaseLiabilityCurrent

dei:EntityNumberOfEmployees
dal:Employeegroups

us-gaap:AdditionalPaidInCapitalCommonStock

us-gaap:AirlineRelatedInventoryAircraftFuel

us-gaap:AirlineRelatedInventoryNet

us-gaap:AirlineRelatedInventoryValuationReserves

us-gaap:AllowanceForDoubtfulAccountsReceivableCurrent
us-gaap:FairValueByFairValueHierarchyLevel
us-gaap:AlternativeInvestment
us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:InvestmentType
us-gaap:StatementEquityComponents
us-gaap:AociTaxAttributableToParent

us-gaap:AssetsNoncurrent

us-gaap:CapitalizedComputerSoftwareNet
us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FairValueByMeasurementFrequency
us-gaap:CashAndCashEquivalentsFairValueDisclosure
us-gaap:FairValueByMeasurementFrequency
us-gaap:ProductOrService
us-gaap:ContractWithCustomerLiability
us-gaap:ProductOrService
us-gaap:ContractWithCustomerLiabilityCurrent
us-gaap:ProductOrService
us-gaap:ContractWithCustomerLiabilityNoncurrent

us-gaap:DebtInstrumentCarryingAmount
us-gaap:DebtInstrument, us-gaap:LongtermDebtType
us-gaap:DebtInstrument, us-gaap:LongtermDebtType
us-gaap:DebtInstrumentFaceAmount
us-gaap:DebtInstrument, us-gaap:LongtermDebtType, us-gaap:SubsequentEventType
us-gaap:DebtInstrument, us-gaap:ShortTermDebtType
us-gaap:DebtInstrument, us-gaap:ShortTermDebtType, us-gaap:SubsequentEventType

us-gaap:DebtInstrumentUnamortizedDiscountPremiumAndDebtIssuanceCostsNet

us-gaap:DebtLongtermAndShorttermCombinedAmount

us-gaap:DeferredIncomeTaxLiabilities

us-gaap:DeferredIncomeTaxLiabilitiesNet

us-gaap:DeferredTaxAssetsDeferredIncome

us-gaap:DeferredTaxAssetsOperatingLossCarryforwards

us-gaap:DeferredTaxAssetsOther

us-gaap:DeferredTaxAssetsStateTaxes

us-gaap:DeferredTaxAssetsTaxCreditCarryforwardsAlternativeMinimumTax

us-gaap:DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefits

us-gaap:DeferredTaxLiabilitiesGoodwillAndIntangibleAssetsIntangibleAssets

us-gaap:DeferredTaxLiabilitiesOther

us-gaap:DeferredTaxLiabilitiesPropertyPlantAndEquipment
us-gaap:RetirementPlanType
us-gaap:DefinedBenefitPlanAccumulatedOtherComprehensiveIncomeBeforeTax
us-gaap:RetirementPlanType
us-gaap:DefinedBenefitPlanAccumulatedOtherComprehensiveIncomeNetGainsLossesBeforeTax
us-gaap:RetirementPlanType
us-gaap:DefinedBenefitPlanAccumulatedOtherComprehensiveIncomeNetPriorServiceCostCreditBeforeTax

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

us-gaap:DefinedBenefitPlanHealthCareCostTrendRateAssumedNextFiscalYear
us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FairValueByMeasurementFrequency, us-gaap:FinancialInstrument
us-gaap:DerivativeAssetsLiabilitiesAtFairValueNet
us-gaap:FairValueByMeasurementFrequency, us-gaap:FinancialInstrument
us-gaap:BalanceSheetLocation
us-gaap:DerivativeFairValueOfDerivativeAsset
us-gaap:BalanceSheetLocation
us-gaap:DerivativeFairValueOfDerivativeAssetAmountNotOffsetAgainstCollateral
us-gaap:BalanceSheetLocation
us-gaap:DerivativeFairValueOfDerivativeLiability
us-gaap:BalanceSheetLocation
us-gaap:DerivativeFairValueOfDerivativeLiabilityAmountNotOffsetAgainstCollateral

us-gaap:DerivativeFairValueOfDerivativeNet
us-gaap:DerivativeInstrumentRisk, us-gaap:DerivativeInstrumentsGainLossByHedgingRelationship, us-gaap:HedgingDesignation
us-gaap:DerivativeNotionalAmount
us-gaap:DerivativeInstrumentRisk, us-gaap:HedgingDesignation

us-gaap:EmployeeRelatedLiabilitiesCurrent
us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName
us-gaap:EquityMethodInvestmentOwnershipPercentage
us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName, us-gaap:SubsequentEventType
us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName
us-gaap:EquityMethodInvestments

us-gaap:EquitySecuritiesFvNi
dal:EquitySecuritiesInvestmentName
us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FairValueByMeasurementFrequency
us-gaap:FairValueByMeasurementFrequency
us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:InvestmentType
us-gaap:FairValueInvestmentsEntitiesThatCalculateNetAssetValuePerShareUnfundedCommittments

us-gaap:FinanceLeaseLiabilityCurrent

us-gaap:FinanceLeaseLiabilityNoncurrent

us-gaap:FinanceLeaseRightOfUseAsset

us-gaap:FinanceLeaseWeightedAverageDiscountRatePercent

us-gaap:FiniteLivedIntangibleAssetsAccumulatedAmortization
us-gaap:FiniteLivedIntangibleAssetsByMajorClass
us-gaap:BalanceSheetLocation, us-gaap:DerivativeInstrumentRisk, us-gaap:HedgingDesignation
us-gaap:ForeignCurrencyCashFlowHedgeAssetAtFairValue
us-gaap:DerivativeInstrumentRisk, us-gaap:HedgingDesignation
us-gaap:ForeignCurrencyCashFlowHedgeDerivativeAtFairValueNet
us-gaap:BalanceSheetLocation, us-gaap:DerivativeInstrumentRisk, us-gaap:HedgingDesignation
us-gaap:ForeignCurrencyCashFlowHedgeLiabilityAtFairValue
us-gaap:BalanceSheetLocation
us-gaap:HedgedLiabilityFairValueHedge
us-gaap:BalanceSheetLocation
us-gaap:HedgedLiabilityFairValueHedgeCumulativeIncreaseDecrease

us-gaap:IndefiniteLivedIntangibleAssetsExcludingGoodwill
us-gaap:IndefiniteLivedIntangibleAssetsByMajorClass
us-gaap:BalanceSheetLocation, us-gaap:DerivativeInstrumentRisk, us-gaap:DerivativeInstrumentsGainLossByHedgingRelationship, us-gaap:HedgingDesignation
us-gaap:InterestRateFairValueHedgeAssetAtFairValue
us-gaap:DerivativeInstrumentRisk, us-gaap:DerivativeInstrumentsGainLossByHedgingRelationship, us-gaap:HedgingDesignation
us-gaap:InterestRateFairValueHedgeDerivativeAtFairValueNet
us-gaap:BalanceSheetLocation, us-gaap:DerivativeInstrumentRisk, us-gaap:DerivativeInstrumentsGainLossByHedgingRelationship, us-gaap:HedgingDesignation
us-gaap:InterestRateFairValueHedgeLiabilityAtFairValue

us-gaap:LineOfCreditFacilityCurrentBorrowingCapacity
us-gaap:DebtInstrument

us-gaap:LongTermDebtAndCapitalLeaseObligations

us-gaap:LongTermDebtAndCapitalLeaseObligationsCurrent

us-gaap:LongTermDebtFairValue
us-gaap:Range, us-gaap:DebtInstrument, us-gaap:LongtermDebtType
us-gaap:LongtermDebtWeightedAverageInterestRate

us-gaap:OperatingLeaseLiabilityCurrent

us-gaap:OperatingLeaseLiabilityNoncurrent

us-gaap:OperatingLeaseWeightedAverageDiscountRatePercent
us-gaap:RetirementPlanType
us-gaap:PensionAndOtherPostretirementDefinedBenefitPlansCurrentLiabilities
us-gaap:RetirementPlanType
us-gaap:PensionAndOtherPostretirementDefinedBenefitPlansLiabilitiesCurrentAndNoncurrent
us-gaap:BalanceSheetLocation, us-gaap:DerivativeInstrumentRisk, us-gaap:HedgingDesignation
us-gaap:PriceRiskDerivativeAssetsAtFairValue
us-gaap:BalanceSheetLocation, us-gaap:DerivativeInstrumentRisk, us-gaap:HedgingDesignation
us-gaap:PriceRiskDerivativeLiabilitiesAtFairValue
us-gaap:DerivativeInstrumentRisk, us-gaap:HedgingDesignation
us-gaap:PriceRiskDerivativesAtFairValueNet

us-gaap:RestrictedCashAndCashEquivalentsAtCarryingValue

us-gaap:RestrictedCashAndCashEquivalentsNoncurrent

us-gaap:RestrictedCashCurrent
us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FairValueByMeasurementFrequency
us-gaap:RestrictedInvestmentsAtFairValue
us-gaap:FairValueByMeasurementFrequency
us-gaap:DebtInstrument, us-gaap:ShortTermDebtType
us-gaap:ShortTermBorrowings

us-gaap:ShortTermNonBankLoansAndNotesPayable

us-gaap:TreasuryStockShares
us-gaap:UnrecordedUnconditionalPurchaseObligationByCategoryOfItemPurchased
us-gaap:UnrecordedUnconditionalPurchaseObligationBalanceOnFifthAnniversary
us-gaap:UnrecordedUnconditionalPurchaseObligationByCategoryOfItemPurchased
us-gaap:UnrecordedUnconditionalPurchaseObligationBalanceOnFirstAnniversary
us-gaap:UnrecordedUnconditionalPurchaseObligationByCategoryOfItemPurchased
us-gaap:UnrecordedUnconditionalPurchaseObligationBalanceOnFourthAnniversary
us-gaap:UnrecordedUnconditionalPurchaseObligationByCategoryOfItemPurchased
us-gaap:UnrecordedUnconditionalPurchaseObligationBalanceOnSecondAnniversary
us-gaap:UnrecordedUnconditionalPurchaseObligationByCategoryOfItemPurchased
us-gaap:UnrecordedUnconditionalPurchaseObligationBalanceOnThirdAnniversary
us-gaap:UnrecordedUnconditionalPurchaseObligationByCategoryOfItemPurchased
us-gaap:UnrecordedUnconditionalPurchaseObligationBalanceSheetAmount
us-gaap:UnrecordedUnconditionalPurchaseObligationByCategoryOfItemPurchased
us-gaap:UnrecordedUnconditionalPurchaseObligationDueAfterFiveYears
us-gaap:AircraftType, us-gaap:UnrecordedUnconditionalPurchaseObligationByCategoryOfItemPurchased
us-gaap:UnrecordedUnconditionalPurchaseObligationMinimumQuantityRequired
us-gaap:UnrecordedUnconditionalPurchaseObligationByCategoryOfItemPurchased

Tables

  2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
 us-gaap:SharesIssued us-gaap:StatementEquityComponents us-gaap:CommonStock▁▂▂▂▃▅▆▆██647652656659664688694699711715NANANA745NANANA800NANANA845NANANA869NANANA868NANANA861NANANA848NANANA
 us-gaap:SharesIssued us-gaap:StatementEquityComponents us-gaap:TreasuryStock█▆▆▆▆▃▃▃▃▁10999988887NANANA14NANANA21NANANA20NANANA18NANANA16NANANA16NANANA13NANANA
us-gaap:CommonStockSharesIssued ▁▁▁▁▁▂▂▃▃▃▃▄▄▄▄▅▅▆▆▆▇▇▇██████████████▇▆647651655659663688693699710714720731742744750762785799807816837845856862867869873875874867866866865861861860859847801NANA
us-gaap:WeightedAverageNumberOfDilutedSharesOutstanding 637NA648652667NA688697706NA719731731NA744763780NA795811826NA843850853NA861859855NA850845847NA844844837NA842842NA
us-gaap:WeightedAverageNumberOfSharesOutstandingBasic 637NA646650665NA686695704NA716728728NA740758774NA788803818NA834841844NA851850848NA846845843NA838838837NA835834NA
us-gaap:EarningsPerShareBasic ▁▃▃▃▂▃▃▂▂▂▃▃▂▂▃▃▂▂▃▃▂▁▂▂▂█▃▂▂▂▂▁▂▂▂▂▁▂▂▂▁-0.841.712.322.221.11.51.911.470.780.811.641.680.830.851.72.041.221.261.671.850.91-0.860.430.950.2510.021.610.810.010.011.24-0.20.150.510.660.24-0.380.020.430.56-0.31
us-gaap:EarningsPerShareDiluted ▁▃▃▃▂▃▃▃▂▂▃▃▂▂▃▃▂▂▃▃▂▁▂▂▂█▃▂▂▂▂▁▂▂▂▂▁▂▂▂▁-0.841.712.312.211.091.491.911.470.770.81.641.680.820.841.692.031.211.251.651.830.9-0.860.420.940.259.891.590.80.010.011.23-0.20.150.50.650.23-0.380.020.430.55-0.31
  2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
us-gaap:Revenues ▃▇██▅▆▇▇▅▅▆▆▄▄▅▅▄▄▆▆▄▄▆▆▄▄▅▅▃▃▅▅▃▃▅▄▂▂▄▃▁8592114391256012536104721074211953117759968102451106010791914894581048310447925195021110710707938896471117810621891690761049097078500860299239732841383999816915377477789895081686848
us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax ▃▇██▅▆▇▇▅▅▆▆▄▄▅▅▄▄▆▆▄▄▆▆▄▄▅▅▃▃▅▅▃▃▅▄▂▂▄▃▁8592114391256012536104721074211953117759968102451106110747914894581048310447925195021110710707938896471117810621891690761049097078500860299239732841383999816915377477789895081686848
 us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:AirlineDestinations us-gaap:AtlanticDestination▁▄█▇▃▄█▆▂99415752336213613161548224419971253NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
 us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:AirlineDestinations us-gaap:DomesticDestination▁▇██▄▅▆▆▃626783598651878774877753812582447111NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
 us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:AirlineDestinations us-gaap:LatinAmericaDestination▅▃▂▄█▁▁▃▇863784757838964732741791917NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
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us-gaap:IncomeTaxExpenseBenefit ▁▄▅▅▃▄▄▄▃▆▇▇▄▄▇█▅-73300452464216336362347171518627667312330641804488NA757881440-428222497122NA-61-4NA543NA-2-3-71NA3110
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  2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
us-gaap:AssetsCurrent ▅▃▂▂▂▁▁▂▃▃▂▂▂▂▂▂▄▄▇▇██▆▆▅▅▄▄▄▃▃▃▃▃▂▃▃▂▂1027582496944713471966340672676417724784470837177688074517329763893069056119731144112266124651099510517974696518951889586418272816384578299772973298063799373077321NANA
us-gaap:CashAndCashEquivalentsAtCarryingValue █▃▂▂▂▁▁▂▁▂▁▂▂▃▁▁▂▂▃▂▂▂▃▄▃▃▃▃▃▃▂▃▃▃▂▃▃▃▄▆▆59672882189920091910156513801886144718141478224119072762163816621708197223692293212220882510336226992844301829652636241622742539291126572307285528812892343644344913
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us-gaap:Goodwill ▁▆▆▆▆▆█████████████████████████████████975397819781978197819781979497949794979497949794979497949794979497949794979497949794979497949794979497949794979497949794979497949794979497949794979497949794NANA
us-gaap:IntangibleAssetsNetExcludingGoodwill █▄▂▂▂▂▂▂▂▂▂▂▂▂▂▂▂▂▁▁▁▁▁▁▁▁▁▂▂▁▂▂▂▂▂60195163482148244827483048354839484348474851485548554844484848524856486145894594459946034614462546424658467546924709467946974716473347514697NANA4749NANANA
us-gaap:OtherAssetsNoncurrent ▂▇█▇▇▇▆▆▆▆▅▄▄▃▃▂▂▂▃▁▁▁▁▁▁▂▂▂▁▁▁▁▁▁▁▁▁▁▁1420376643093815384436083437326834463309287825452363173317221578147514281848109810191010111911051159130312801342113110921099114410311002960992103010311088NANA
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us-gaap:LiabilitiesCurrent ▇▇▇██▆▆▇▇▆▅▅▄▄▄▄▆▅▅▅▅▅▃▄▄▃▃▃▃▂▂▃▃▂▁▂▂▁▁193922020420211211642132318578181581926920012185731649616631159531523915147162501810817526176081708217319168791481315209150101415214134147751406813270132241469313646127011201212802122601138511820NANA
us-gaap:LongTermDebtCurrent NA2054195320872954140910801256NA2145NANANA1009NANANA1415NANANA1109NANANA1449NANANA1507NANANA1827NANANA1954NANANA
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us-gaap:LiabilitiesNoncurrent █▅▅▄▄▅▂▂▁▁▁▁▂▂▂▂▃▃▃▄▄▅▃▃▃▄▆▇▇▇▆▆▆▇▅▆▆▆▆350372897027940273962760728001231412367121509208092143121705225612373523291235742398224758256932613627387284292483124779255162645731726321813294333411311763116231554321942980230291308633090630618NANA
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us-gaap:NetCashProvidedByUsedInInvestingActivities ▁▆▅▄▅▅▅▄▅▄▄▅▄█▅▅▆-2971-767-1125-1566-1105-1012-909-1545-927-1332-1322-978-1734445-887-1112-601NA-1009-955-812-38-1583NA-563NANANA-630NANANA-349NANANA-576NANANA-293
us-gaap:NetCashProvidedByUsedInFinancingActivities █▄▂▁▂▃▂▃▂▃▂▂▅▃▂▁▂5344842-1451-1662-609-252-1203516-787-250-1086-10741680-446-991-2149-674NA-982-1619-790-966-627NA-533NANANA-154NANANA-228NANANA-223NANANA-367
  2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
us-gaap:NetCashProvidedByUsedInOperatingActivities ▃▄▆█▆▅▅▇▅▆▅▆▁▄▆█▄3589572245327219511364150028071343191816452386-8011125185432151011NA2067274516365821358NA951NANANA1004NANANA831NANANA788NANANA966
us-gaap:NetIncomeLoss ▁▂▃▃▂▂▃▂▂▂▂▂▂▂▃▃▂▂▃▃▂▁▂▂▂█▃▂▂▂▂▁▂▂▂▂▁▂▂▂▁-534109914951443730101913121025547572117812246036221259154694698013151485746-71235780121384791369685771047-168124425549198-31819363467-256
us-gaap:DepreciationDepletionAndAmortization ▇▅▆█▅▃▄▄▅▄▄▃▃▁▁▁▁678621631713615549580590610586574535540472474470486NA466448470438440451442NANANANANANANANANANANANANANANANA
 us-gaap:DepreciationDepletionAndAmortization us-gaap:ConsolidationItems,us-gaap:StatementBusinessSegments us-gaap:OperatingSegments,dal:Airline██▆█▅▃▄▅▅▅▄▃▃▂▂▂▂▁▁▁▂678695606688592530564573595571563524530460464461477444458440463NANANANANANANANANANANANANANANANANANANANA
  2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
us-gaap:NetCashProvidedByUsedInInvestingActivities ▁▆▅▄▅▅▅▄▅▄▄▅▄█▅▅▆-2971-767-1125-1566-1105-1012-909-1545-927-1332-1322-978-1734445-887-1112-601NA-1009-955-812-38-1583NA-563NANANA-630NANANA-349NANANA-576NANANA-293
  2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
us-gaap:NetCashProvidedByUsedInFinancingActivities █▄▂▁▂▃▂▃▂▃▂▂▅▃▂▁▂5344842-1451-1662-609-252-1203516-787-250-1086-10741680-446-991-2149-674NA-982-1619-790-966-627NA-533NANANA-154NANANA-228NANANA-223NANANA-367
us-gaap:ProceedsFromIssuanceOfLongTermDebt █▄▁▁▂▂▁▇▁▂▁▁▅▁▁▁▂3962155700500621031240450002004000450NA99704140707NA59NANA00NANANA0NANANA245NANANA0
us-gaap:PaymentsOfDividends ███▇▇▇▇▆▆▆▆▃▃▃▃▁▁260259260228233239240213217215219148149149150103107NA10772757575NA51NANA00NANANANANANANANANANANANA
us-gaap:PaymentsOfDividends ███▇▇▇▇▆▆▆▆▃▃▃▃▁▁260259260228233239240213217215219148149149150103107NA10772757575NA51NANA00NANANANANANANANANANANANA
us-gaap:PaymentsForRepurchaseOfCommonStock ▂▁▁▁█▂▂▃▂▂▃▃▁▂▃▆▅34422520926813253253256003253275506002003005001026775NA425925425500250NA125NANA00NANANANANANANANANANANANA
  2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31

Common Stock Value

Common Stock Par Or Stated Value Per Share

Shares Issued

us-gaap:StatementEquityComponents

us-gaap:SharesIssued

us-gaap:CommonStock



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-312010-12-312009-12-312008-12-31
Value647652656659664688694699711715745800845869868861848795703
Percentage of SharesIssued100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:TreasuryStock



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-312010-12-312009-12-312008-12-31
Value1099998888714212018161613118
Percentage of SharesIssued1.51.41.41.41.41.21.21.11.11.01.92.62.42.11.81.91.51.41.1

Common Stock Shares Issued

us-gaap:CommonStockSharesIssued



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302009-12-31
Value647651655659663688693699710714720731742744750762785799807816837845856862867869873875874867866866865861861860859847801794
Percentage of CommonStockSharesIssued100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Common Stock Shares Authorized

Weighted Average Number Of Diluted Shares Outstanding

us-gaap:WeightedAverageNumberOfDilutedSharesOutstanding



Period End2020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-312017-09-302017-06-302017-03-312016-09-302016-06-302016-03-312015-09-302015-06-302015-03-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-312012-09-302012-06-302012-03-312011-09-302011-06-302011-03-312010-09-302010-06-30
Value637648652667688697706719731731744763780795811826843850853861859855850845847844844837842842
Percentage of WeightedAverageNumberOfDilutedSharesOutstanding100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Weighted Average Number Of Shares Outstanding Basic

us-gaap:WeightedAverageNumberOfSharesOutstandingBasic



Period End2020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-312017-09-302017-06-302017-03-312016-09-302016-06-302016-03-312015-09-302015-06-302015-03-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-312012-09-302012-06-302012-03-312011-09-302011-06-302011-03-312010-09-302010-06-30
Value637646650665686695704716728728740758774788803818834841844851850848846845843838838837835834
Percentage of WeightedAverageNumberOfSharesOutstandingBasic100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Earnings Per Share Basic

us-gaap:EarningsPerShareBasic



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-09-30
Value-0.841.712.322.221.11.51.911.470.780.811.641.680.830.851.72.041.221.261.671.850.91-0.860.430.950.2510.021.610.810.010.011.24-0.20.150.510.660.24-0.380.020.430.56-0.31-0.19
Percentage of EarningsPerShareBasic100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Earnings Per Share Diluted

us-gaap:EarningsPerShareDiluted



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-09-30
Value-0.841.712.312.211.091.491.911.470.770.81.641.680.820.841.692.031.211.251.651.830.9-0.860.420.940.259.891.590.80.010.011.23-0.20.150.50.650.23-0.380.020.430.55-0.31-0.19
Percentage of EarningsPerShareDiluted100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Revenues

us-gaap:Revenues



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value8592114391256012536104721074211953117759968102451106010791914894581048310447925195021110710707938896471117810621891690761049097078500860299239732841383999816915377477789895081686848
Percentage of Revenues100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.4100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Revenue From Contract With Customer Excluding Assessed Tax

us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value8592114391256012536104721074211953117759968102451106110747914894581048310447925195021110710707938896471117810621891690761049097078500860299239732841383999816915377477789895081686848
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:AirlineDestinations

us-gaap:AtlanticDestination



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value99415752336213613161548224419971253
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax11.613.818.617.012.614.418.817.012.6
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax11.613.818.617.012.614.418.817.012.6
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:AtlanticDestination100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DomesticDestination



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value626783598651878774877753812582447111
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax72.973.168.970.171.572.268.070.071.3
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax72.973.168.970.171.572.268.070.071.3
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:DomesticDestination100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:LatinAmericaDestination



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value863784757838964732741791917
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax10.06.96.06.79.26.86.26.79.2
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax10.06.96.06.79.26.86.26.79.2
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:LatinAmericaDestination100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:PacificDestination



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value468721816775705709843743687
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax5.46.36.56.26.76.67.16.36.9
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax5.46.36.56.26.76.67.16.36.9
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:PacificDestination100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ConsolidationItems, us-gaap:ProductOrService

us-gaap:IntersegmentElimination, dal:ExchangedProducts



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-30
Value-831-1000-1100-1100-732-500-1100-1100-876-800-910-756-733-700-734-745-526-700-761-858
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax-9.7-8.7-8.8-8.8-7.0-4.7-9.2-9.3-8.8-7.8-8.2-7.0-8.0-7.4-7.0-7.1-5.7-7.4-6.9-8.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax-9.7-8.7-8.8-8.8-7.0-4.7-9.2-9.3-8.8-7.8-8.2-7.0-8.0-7.4-7.0-7.1-5.7-7.4-6.9-8.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:IntersegmentElimination dal:ExchangedProducts100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:IntersegmentElimination, dal:Salesofrefinedproductstothirdparties



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-31
Value-143-35-52-76-232-69-63-80-140-65-79-123-144-132-54-55-16597-117-92-51
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax-1.7-0.3-0.4-0.6-2.2-0.6-0.5-0.7-1.4-0.6-0.7-1.1-1.6-1.4-0.5-0.5-0.26.3-1.1-0.9-0.5
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax-1.7-0.3-0.4-0.6-2.2-0.6-0.5-0.7-1.4-0.6-0.7-1.1-1.6-1.4-0.5-0.5-0.26.3-1.1-0.9-0.5
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:IntersegmentElimination dal:Salesofrefinedproductstothirdparties100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:IntersegmentElimination, dal:Salestoairlinesegment



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-31
Value-210-221-304-307-271-96-328-275-262-264-239-193-190-200-173-178-1441782-267-292-233
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax-2.4-1.9-2.4-2.4-2.6-0.9-2.7-2.3-2.6-2.6-2.2-1.8-2.1-2.1-1.7-1.7-1.618.8-2.4-2.7-2.5
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax-2.4-1.9-2.4-2.4-2.6-0.9-2.7-2.3-2.6-2.6-2.2-1.8-2.1-2.1-1.7-1.7-1.618.8-2.4-2.7-2.5
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:IntersegmentElimination dal:Salestoairlinesegment100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ConsolidationItems, us-gaap:StatementBusinessSegments

us-gaap:OperatingSegments, dal:Airline



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-31
Value8592114361255412496104241073111845115599755998310932106809087917410473103989172949810994105929314
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax100.0100.0100.099.799.599.999.198.297.997.498.899.499.397.099.999.599.1100.099.098.999.2
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax100.0100.0100.099.799.599.999.198.297.997.498.899.499.397.099.999.599.1100.099.098.999.2
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:OperatingSegments dal:Airline100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OperatingSegments, dal:Refinery



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-31
Value11841269150515011283691160916671491141513571139112810809711027765986125813571140
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax13.811.112.012.012.36.413.514.215.013.812.310.612.311.49.39.88.310.411.312.712.1
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax13.811.112.012.012.36.413.514.215.013.812.310.612.311.49.39.88.310.411.312.712.1
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:OperatingSegments dal:Refinery100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ProductOrService

dal:PassengerAirTraffic



Period 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
Value6511892210029996979888436955393087653794488128606
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax75.878.079.879.576.378.579.979.076.877.579.780.1
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax75.878.079.879.576.378.579.979.076.877.579.780.1
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax dal:PassengerAirTraffic100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

dal:PassengerLoyaltyTravelAwards



Period 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
Value543726732751692675678680618577622622
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax6.36.35.86.06.66.35.75.86.25.65.65.8
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax6.36.35.86.06.66.35.75.86.25.65.65.8
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax dal:PassengerLoyaltyTravelAwards100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

dal:PassengerTravelRelatedServices



Period 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
Value515597649648574537565558494501545540
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax6.05.25.25.25.55.04.74.75.04.94.95.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax6.05.25.25.25.55.04.74.75.04.94.95.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax dal:PassengerTravelRelatedServices100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

dal:ProductAndServiceOtherAncillaryBusinessesAndRefinery



Period 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
Value223307291330369326433522521541419320
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax2.62.72.32.63.53.03.64.45.25.33.83.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax2.62.72.32.63.53.03.64.45.25.33.83.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax dal:ProductAndServiceOtherAncillaryBusinessesAndRefinery100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

dal:ProductAndServiceOtherLoyaltyProgram



Period 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
Value474519485484474384369358347330317316
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax5.54.53.93.94.53.63.13.03.53.22.92.9
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax5.54.53.93.94.53.63.13.03.53.22.92.9
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax dal:ProductAndServiceOtherLoyaltyProgram100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

dal:ProductAndServiceOtherMiscellaneous



Period 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
Value174182185168183170129126133133155156
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax2.01.61.51.31.71.61.11.11.31.31.41.5
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax2.01.61.51.31.71.61.11.11.31.31.41.5
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax dal:ProductAndServiceOtherMiscellaneous100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:CargoAndFreight



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-30
Value152186189186192214226223202202191187
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax1.81.61.51.51.82.01.91.92.02.01.71.7
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax1.81.61.51.51.82.01.91.92.02.01.71.7
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:CargoAndFreight100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:Passenger



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-30
Value75691024511410113689254964810796105468765902299799768
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax88.189.690.890.788.489.890.389.687.988.190.290.9
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax88.189.690.890.788.489.890.389.687.988.190.290.9
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:Passenger100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ProductAndServiceOther



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-30
Value87110089619821026880931100610011004891792
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax10.18.87.77.89.88.27.88.510.09.88.17.4
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax10.18.87.77.89.88.27.88.510.09.88.17.4
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:ProductAndServiceOther100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ProductOrService, us-gaap:AirlineDestinations

us-gaap:Passenger, us-gaap:AtlanticDestination



Period 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
Value81813392060188011031328199617821070124018021566
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax9.511.716.415.010.512.416.715.110.712.116.314.6
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax9.511.716.415.010.512.416.715.110.712.116.314.6
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:Passenger us-gaap:AtlanticDestination100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:Passenger, us-gaap:DomesticDestination



Period 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
Value560176127971807167137066739574136282655867756888
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax65.266.563.564.464.165.861.963.063.064.061.364.1
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax65.266.563.564.464.165.861.963.063.064.061.364.1
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:Passenger us-gaap:DomesticDestination100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:Passenger, us-gaap:LatinAmericaDestination



Period 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
Value765704683760855660675709830636693714
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax8.96.25.46.18.26.15.66.08.36.26.36.6
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax8.96.25.46.18.26.15.66.08.36.26.36.6
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:Passenger us-gaap:LatinAmericaDestination100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:Passenger, us-gaap:PacificDestination



Period 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
Value385590696657583594730642583588709600
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax4.55.25.55.25.65.56.15.55.85.76.45.6
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax4.55.25.55.25.65.56.15.55.85.76.45.6
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:Passenger us-gaap:PacificDestination100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Operating Expenses

Costs And Expenses

us-gaap:CostsAndExpenses



Period End2020-03-312019-03-312011-06-302011-03-312010-09-302010-06-302010-03-312009-09-30
Value90029452867278397947731667807370
Percentage of CostsAndExpenses100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax104.890.394.7101.288.889.699.00.0

Selling And Marketing Expense

us-gaap:SellingAndMarketingExpense



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-312012-09-302012-06-302012-03-312011-09-302011-06-302011-03-312010-09-302010-06-302010-03-312009-09-30
Value358488539538427468535511427443482458404419466437388463421386411476440373447408357440393380480440369404377364384
Percentage of SellingAndMarketingExpense100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax4.24.34.34.34.14.44.54.34.34.34.44.34.44.44.44.24.24.23.94.14.34.34.14.24.34.24.24.44.04.54.94.84.84.54.65.30.0

Operating Income Loss

us-gaap:OperatingIncomeLoss



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-09-30
Value-4101399207121281020109016421680840119318392028105310201969242315401717221324741398-828835157962070115639142223521308134382726860481-92294100385268204
Percentage of OperatingIncomeLoss100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax-4.812.216.517.09.710.113.714.38.411.616.618.911.510.818.823.216.618.119.923.114.9-8.67.514.97.07.714.99.42.64.113.21.44.58.68.85.3-1.23.811.210.41.00.0

us-gaap:ConsolidationItems, us-gaap:StatementBusinessSegments

us-gaap:OperatingSegments, dal:Airline



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-31
Value-4391375202220911054114616301635796117018022022100910622014243315681709210723841312
Percentage of OperatingIncomeLoss107.198.397.698.3103.3105.199.397.394.898.198.099.795.8104.1102.3100.4101.899.595.296.493.8
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax-5.112.016.116.710.110.713.613.98.011.416.318.811.011.219.223.316.918.019.022.314.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:OperatingSegments dal:Airline-5.112.016.116.710.110.713.814.18.211.716.518.911.111.619.223.417.118.019.222.514.1

us-gaap:OperatingSegments, dal:Refinery



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-31
Value29244937-34-431245442337644-42-45-10-2881069086
Percentage of OperatingIncomeLoss-7.11.72.41.7-3.3-3.90.72.75.21.92.00.34.2-4.1-2.3-0.4-1.80.54.83.66.2
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax0.30.20.40.3-0.3-0.40.10.40.40.20.30.10.5-0.4-0.4-0.1-0.30.11.00.80.9
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:OperatingSegments dal:Refinery2.41.93.32.5-2.7-6.20.72.73.01.62.70.53.9-3.9-4.6-1.0-3.70.88.46.67.5

Interest Expense

Other Nonoperating Income Expense

us-gaap:OtherNonoperatingIncomeExpense



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-312012-09-302012-06-302012-03-312011-09-302011-06-302011-03-312010-09-302010-06-302010-03-312009-09-30
Value-6-64-19-64-911366619-38-566-34-442526201-2019-81-170323-8113-151-1-4217-316-925-72-815
Percentage of OtherNonoperatingIncomeExpense100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax-0.1-0.6-0.2-0.5-0.91.30.60.2-0.4-0.00.6-0.3-0.50.30.20.20.0-0.20.2-0.9-1.80.30.0-0.90.1-0.20.0-0.0-0.40.2-0.30.1-0.10.3-0.9-0.10.0

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

us-gaap:IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-312012-09-302012-06-302012-03-312011-09-302011-06-302011-03-312010-09-30
Value-607139819471907946138716741372718109018051891915952190023501434207223661186-11405791298335136368631052-164127547195-389366
Percentage of IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax-7.112.215.515.29.012.914.011.77.210.616.317.610.010.118.122.515.518.722.112.6-11.85.212.23.813.07.10.010.6-1.71.55.62.1-5.04.1

Nonoperating Income Expense

us-gaap:NonoperatingIncomeExpense



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-312012-09-302012-06-302012-03-312011-09-302011-06-302011-03-312010-09-302010-06-302010-03-312009-09-30
Value-197-1-124-221-7428432-308-122-104-34-137-138-68-69-73-106-141-108-212-312-256-281-285-200-228-219-256-298-255-313-286-297-637-384-314-383
Percentage of NonoperatingIncomeExpense100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax-2.3-0.0-1.0-1.8-0.72.60.3-2.6-1.2-1.0-0.3-1.3-1.5-0.7-0.7-0.7-1.1-1.3-1.0-2.3-3.2-2.3-2.6-3.2-1.9-2.3-2.6-2.6-3.1-3.0-3.2-3.1-3.8-7.1-4.7-4.60.0

Income Tax Expense Benefit

us-gaap:IncomeTaxExpenseBenefit



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-312012-09-302012-06-302012-03-312011-09-302011-06-302011-03-312010-09-302010-06-302010-03-312009-09-30
Value-73300452464216336362347171518627667312330641804488757881440-428222497122-61-4543-2-3-713110-18
Percentage of IncomeTaxExpenseBenefit100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax-0.82.63.63.72.13.13.02.91.75.15.76.23.43.56.17.75.36.88.24.7-4.42.04.71.4-0.10.0-0.00.10.00.0-0.0-0.0-0.90.00.00.10.0

Comprehensive Income Net Of Tax

us-gaap:ComprehensiveIncomeNetOfTax



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-312012-09-302012-06-302012-03-312011-09-302011-06-302011-03-312010-09-302010-06-302010-03-31
Value-4437541545151578986713831100487427125112466681981326154694212871491763-292339480320413767801581073-1403724188-143500116-195
Percentage of ComprehensiveIncomeNetOfTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax-5.26.612.312.17.58.111.69.34.94.211.311.67.32.112.614.810.211.613.98.1-30.33.57.62.313.18.01.910.8-1.44.44.30.1-1.85.61.4-2.8

Net Income Loss

us-gaap:NetIncomeLoss



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-09-30
Value-534109914951443730101913121025547572117812246036221259154694698013151485746-71235780121384791369685771047-168124425549198-31819363467-256-161
Percentage of NetIncomeLoss100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax-6.29.611.911.57.09.511.08.75.55.610.711.46.66.612.014.810.210.311.813.97.9-7.43.27.52.493.413.17.10.10.110.6-1.71.55.15.62.2-4.10.24.15.7-3.70.0

us-gaap:StatementEquityComponents

us-gaap:RetainedEarnings



Period End2020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-31
Value-5341495144373013221036557
Percentage of NetIncomeLoss100.0100.0100.0100.0100.8101.1101.8
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax-6.211.911.57.011.18.85.6
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:RetainedEarnings0.00.00.00.00.00.00.0

Assets

us-gaap:Assets



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302009-12-31
Value68738645326321962518618416026655003557965407853292519285181551459512615094851634533425313453646527815375254121519405219152167522524599745772450684455044352447204418943499430364387843881431884315343539
Percentage of Assets100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ConsolidationItems, us-gaap:StatementBusinessSegments

us-gaap:OperatingSegments, dal:Airline



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312013-12-31
Value6686462793615156068560343585615310353335521165116549992503285013949930497485021352093517855228751508525875289650932
Percentage of Assets97.397.397.397.197.697.296.595.696.496.096.397.197.497.497.697.297.797.597.597.697.897.797.5
Percentage of Assets97.397.397.397.197.697.296.595.696.496.096.397.197.497.497.697.297.797.597.597.697.897.797.5
Percentage of Assets us-gaap:OperatingSegments dal:Airline100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OperatingSegments, dal:Refinery



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312013-12-31
Value18741739170418331498170519002461196221271936148713201331120014211249134912581173105611091172
Percentage of Assets2.72.72.72.92.42.83.54.43.64.03.72.92.62.62.42.82.32.52.32.22.02.02.2
Percentage of Assets2.72.72.72.92.42.83.54.43.64.03.72.92.62.62.42.82.32.52.32.22.02.02.2
Percentage of Assets us-gaap:OperatingSegments dal:Refinery100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Liabilities And Stockholders Equity

us-gaap:LiabilitiesAndStockholdersEquity



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302009-12-31
Value68738645326321962518618416026655003557965407853292519285181551459512615094851634533425313453646527815375254121519405219152167522524599745772450684455044352447204418943499430364387843881431884315343539
Percentage of LiabilitiesAndStockholdersEquity100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Stockholders Equity

us-gaap:StockholdersEquity



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302009-12-312008-12-31
Value1430915358150681395812911136871370412856125571391014001134791294512287125101181011252108501034595639046881312296122031164111643137-1184-1943-2131-48-1135-1011-13961222785758897715245874
Percentage of StockholdersEquity100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets20.823.823.822.320.922.724.923.023.226.127.026.025.224.024.622.921.120.419.318.116.816.323.723.422.322.30.3-2.6-4.3-4.8-0.1-2.5-2.3-3.22.81.81.72.11.70.60.0

us-gaap:StatementEquityComponents

dal:AccumulatedNetGainLossAndAdjustmentOther



Period End2020-03-312019-12-312019-03-312018-12-31
Value12710699100
Percentage of StockholdersEquity0.90.70.80.7
Percentage of Assets0.20.20.20.2
Percentage of Assets dal:AccumulatedNetGainLossAndAdjustmentOther0.00.00.00.0

us-gaap:AccumulatedDefinedBenefitPlansAdjustment



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302014-12-312013-12-31
Value-8025-8095-7748-7795-7865-7925-7635-7701-7761-7812-7592-7631-7673-7714-7243-7282-7318-7354-7403-7442-7517-5323
Percentage of StockholdersEquity-56.1-52.7-51.4-55.8-60.9-57.9-55.7-59.9-61.8-56.2-54.2-56.6-59.3-62.8-57.9-61.7-65.0-67.8-71.6-77.8-85.3-45.7
Percentage of Assets-11.7-12.5-12.3-12.5-12.7-13.2-13.9-13.8-14.4-14.7-14.6-14.7-14.9-15.0-14.2-14.1-13.7-13.8-13.8-14.1-13.9-10.2
Percentage of Assets us-gaap:AccumulatedDefinedBenefitPlansAdjustment0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:AccumulatedNetGainLossFromDesignatedOrQualifyingCashFlowHedges



Period End2019-12-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302014-12-312013-12-31
Value10610010095807067768197464889140155189222219
Percentage of StockholdersEquity0.70.70.70.70.60.50.50.60.60.80.40.40.81.31.52.02.51.9
Percentage of Assets0.20.20.20.20.10.10.10.10.20.20.10.10.20.30.30.40.40.4
Percentage of Assets us-gaap:AccumulatedNetGainLossFromDesignatedOrQualifyingCashFlowHedges0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:AccumulatedNetUnrealizedInvestmentGainLoss



Period End2019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302014-12-312013-12-31
Value0000000012149621-19-15-45-50-61-68-35-16-26
Percentage of StockholdersEquity0.00.00.00.00.00.00.00.00.90.30.00.2-0.2-0.1-0.4-0.4-0.6-0.7-0.4-0.2-0.2
Percentage of Assets0.00.00.00.00.00.00.00.00.20.10.00.0-0.0-0.0-0.1-0.1-0.1-0.1-0.1-0.0-0.0
Percentage of Assets us-gaap:AccumulatedNetUnrealizedInvestmentGainLoss0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:AccumulatedOtherComprehensiveIncome



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302014-12-312013-12-312012-12-312011-12-312010-12-312009-12-312008-12-31
Value-7898-7989-7645-7694-7766-7825-7535-7606-7681-7621-7476-7549-7571-7636-7212-7279-7279-7275-7316-7288-7311-5130-8577-6766-3578-3563-4080
Percentage of StockholdersEquity-55.2-52.0-50.7-55.1-60.2-57.2-55.0-59.2-61.2-54.8-53.4-56.0-58.5-62.1-57.6-61.6-64.7-67.1-70.7-76.2-83.0-44.1402.5484.7-398.9-1454.3-466.8
Percentage of Assets-11.5-12.4-12.1-12.3-12.6-13.0-13.7-13.6-14.2-14.3-14.4-14.6-14.7-14.9-14.2-14.1-13.6-13.7-13.6-13.8-13.5-9.8-19.3-15.6-8.3-8.20.0
Percentage of Assets us-gaap:AccumulatedOtherComprehensiveIncome0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:AdditionalPaidInCapital



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-312010-12-312009-12-312008-12-31
Value11054111291117711201112541167111740118071196712053122941087512981139821406913999139261382713714
Percentage of StockholdersEquity77.372.574.280.287.285.385.791.895.386.6100.1100.2147.3120.1-660.2-1002.81552.55643.71569.1
Percentage of Assets16.117.217.717.918.219.421.321.222.122.624.020.524.026.831.632.232.231.80.0
Percentage of Assets us-gaap:AdditionalPaidInCapital0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:RetainedEarnings



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-312010-12-312009-12-312008-12-31
Value1142312454117721068696561003994838629823096367903762334563049-7389-8398-9252-9845-8608
Percentage of StockholdersEquity79.881.178.176.674.873.369.267.165.569.364.370.339.226.2346.7601.6-1031.4-4018.4-984.9
Percentage of Assets16.619.318.617.115.616.717.215.515.218.115.414.36.45.8-16.6-19.3-21.4-22.60.0
Percentage of Assets us-gaap:RetainedEarnings0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:TreasuryStock



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-312010-12-312009-12-312008-12-31
Value-270-236-236-235-233-198-197-196-194-158-274-373-313-258-234-231-199-174-152
Percentage of StockholdersEquity-1.9-1.5-1.6-1.7-1.8-1.4-1.4-1.5-1.5-1.1-2.2-3.4-3.6-2.211.016.5-22.2-71.0-17.4
Percentage of Assets-0.4-0.4-0.4-0.4-0.4-0.3-0.4-0.4-0.4-0.3-0.5-0.7-0.6-0.5-0.5-0.5-0.5-0.40.0
Percentage of Assets us-gaap:TreasuryStock0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

Assets Current

us-gaap:AssetsCurrent



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302009-12-31
Value10275824969447134719663406726764177247844708371776880745173297638930690561197311441122661246510995105179746965189518895864182728163845782997729732980637993730773217741
Percentage of AssetsCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets14.912.811.011.411.610.512.213.714.314.713.613.913.414.514.414.817.417.022.321.722.823.021.220.218.718.519.519.419.218.618.418.918.817.817.018.418.216.917.017.8

Cash And Cash Equivalents At Carrying Value

us-gaap:CashAndCashEquivalentsAtCarryingValue



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312009-09-302008-12-31
Value59672882189920091910156513801886144718141478224119072762163816621708197223692293212220882510336226992844301829652636241622742539291126572307285528812892343644344913460753964255
Percentage of CashAndCashEquivalentsAtCarryingValue100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets8.74.53.03.23.12.62.53.42.73.42.84.33.75.43.23.23.23.74.44.33.93.94.86.45.25.46.66.55.85.45.15.76.66.15.46.56.66.78.00.00.010.60.00.0

Short Term Investments

Receivables Net Current

us-gaap:ReceivablesNetCurrent



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302009-12-31
Value2280285428362844315423142517242725682377239921642307206419962102217920201974196620572297213521042042160919692084199416931785182818071563181618851848145615121353
Percentage of ReceivablesNetCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets3.34.44.54.55.13.84.64.34.74.54.64.24.54.03.94.14.13.83.73.73.84.24.14.03.93.14.34.64.43.84.04.14.13.64.24.34.23.43.53.1

Inventory Finished Goods

us-gaap:InventoryFinishedGoods



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312011-12-31
Value4397305685906015927151149723916720537487519424455367379381553475534602604600706679586624619168
Percentage of InventoryFinishedGoods100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets0.61.10.90.91.01.01.32.11.31.71.41.00.91.00.80.90.70.70.71.00.91.01.21.21.21.41.51.31.41.40.4

Prepaid Expense And Other Assets Current

us-gaap:PrepaidExpenseAndOtherAssetsCurrent



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302010-12-31
Value10541262113711981061120311811219204014991110108710688549101017887796816815790733122012211209131813551302130413441876188214751418106711791159
Percentage of PrepaidExpenseAndOtherAssetsCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets1.52.01.81.91.72.02.12.23.82.82.12.12.11.71.82.01.71.51.51.51.51.42.32.32.32.52.92.82.93.04.24.23.33.32.52.72.7

Property Plant And Equipment Gross

Accumulated Depreciation Depletion And Amortization Property Plant And Equipment

Property Plant And Equipment Net

Goodwill

us-gaap:Goodwill



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302009-12-31
Value9753978197819781978197819794979497949794979497949794979497949794979497949794979497949794979497949794979497949794979497949794979497949794979497949794979497949787
Percentage of Goodwill100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets14.215.215.515.615.816.217.817.618.118.418.918.919.019.119.219.018.418.418.318.618.218.118.918.818.818.721.321.421.722.022.121.922.222.522.822.322.322.722.722.5

Intangible Assets Net Excluding Goodwill

us-gaap:IntangibleAssetsNetExcludingGoodwill



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302010-12-31
Value601951634821482448274830483548394843484748514855485548444848485248564861458945944599460346144625464246584675469247094679469747164733475146974749
Percentage of IntangibleAssetsNetExcludingGoodwill100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets8.88.07.67.77.88.08.88.79.09.19.39.49.49.49.59.49.19.18.68.78.68.58.98.98.98.910.210.310.410.510.610.510.710.910.911.0

Finite Lived Intangible Assets Net

Deferred Tax Assets Liabilities Net

Other Assets Noncurrent

us-gaap:OtherAssetsNoncurrent



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302009-12-31
Value1420376643093815384436083437326834463309287825452363173317221578147514281848109810191010111911051159130312801342113110921099114410311002960992103010311088749
Percentage of OtherAssetsNoncurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets2.15.86.86.16.26.06.25.96.46.25.54.94.63.43.43.12.82.73.42.11.91.92.22.12.22.52.82.92.52.52.52.62.32.32.22.32.32.42.51.7

Liabilities Current

us-gaap:LiabilitiesCurrent



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302009-12-31
Value1939220204202112116421323185781815819269200121857316496166311595315239151471625018108175261760817082173191687914813152091501014152141341477514068132701322414693136461270112012128021226011385118209797
Percentage of LiabilitiesCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets28.231.332.033.934.530.833.034.537.034.931.832.131.029.729.731.533.933.032.832.432.231.228.529.128.827.130.732.331.229.829.832.930.929.227.929.227.926.427.422.5

Long Term Debt Current

us-gaap:LongTermDebtCurrent



Period End2019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-312010-12-31
Value205419532087295414091080125621451009141511091449150718271954
Percentage of LongTermDebtCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets3.23.13.34.82.32.02.34.02.02.72.02.83.44.24.5

Accounts Payable Current

us-gaap:AccountsPayableCurrent



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302009-12-31
Value3337326634703359321429763265374933513674305927262353257225672956273227432688280324922622257725362341230025922571240522932325217519981600164119001907171316611249
Percentage of AccountsPayableCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets4.95.15.55.45.24.95.96.76.26.95.95.34.65.05.05.75.15.25.05.34.64.85.04.94.54.45.65.65.35.15.24.94.53.73.84.34.34.03.82.9

Other Accrued Liabilities Current

us-gaap:OtherAccruedLiabilitiesCurrent



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302009-12-31
Value130910781181133513971117132915212404185822432457261916501366150317191306137914681991212790276883711215717548731128985164110411867861727613654608765
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 Assets1.91.71.92.12.31.92.42.74.43.54.34.75.13.22.72.93.22.52.62.83.73.91.71.51.62.11.21.61.92.52.23.72.44.32.01.71.41.51.41.8

Taxes Payable Current

Liabilities Noncurrent

us-gaap:LiabilitiesNoncurrent



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302009-12-31
Value35037289702794027396276072800123141236712150920809214312170522561237352329123574239822475825693261362738728429248312477925516264573172632181329433341131176311623155432194298023029130863309063061833497
Percentage of LiabilitiesNoncurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets51.044.944.243.844.646.542.142.439.839.041.341.943.846.345.745.745.046.647.949.551.052.547.847.548.950.669.070.373.175.070.369.771.474.069.269.070.371.671.076.9

Long Term Debt

us-gaap:LongTermDebt



Period End2019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-31
Value1010690259296103899368888195148440700879469379108451210612319126751306013750138921439014507
Percentage of LongTermDebt100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets15.714.314.916.815.516.117.115.813.715.017.320.827.227.528.730.031.931.732.833.6

Long Term Debt Noncurrent

us-gaap:LongTermDebtNoncurrent



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-312010-12-31
Value11750805270727209743579597801825862955999653182709396105991123312553
Percentage of LongTermDebtNoncurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets17.112.511.211.512.013.214.214.811.811.712.315.318.023.825.829.1

Deferred Tax Liabilities Noncurrent

Pension And Other Postretirement Defined Benefit Plans Liabilities Noncurrent

us-gaap:PensionAndOtherPostretirementDefinedBenefitPlansLiabilitiesNoncurrent



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302009-12-31
Value82858452845785169086916389029052919398109565962310291133781258712576126951385513867138691417015138115291152311811123921537915356158651600513688136131390514200112501130711487114931138311745
Percentage of PensionAndOtherPostretirementDefinedBenefitPlansLiabilitiesNoncurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets12.113.113.413.614.715.216.216.217.018.418.418.620.026.124.724.423.826.125.826.326.428.022.222.122.623.733.433.535.235.930.930.431.532.626.125.826.226.626.427.0

us-gaap:RetirementPlanType

us-gaap:OtherPostretirementBenefitPlansDefinedBenefit



Period End2019-12-312018-12-312017-12-312016-12-31
Value2647246525172470
Percentage of PensionAndOtherPostretirementDefinedBenefitPlansLiabilitiesNoncurrent31.326.925.718.5
Percentage of Assets4.14.14.74.8
Percentage of Assets us-gaap:OtherPostretirementBenefitPlansDefinedBenefit0.00.00.00.0

us-gaap:PensionPlansDefinedBenefit



Period End2019-12-312018-12-312017-12-312016-12-31
Value53356323692010528
Percentage of PensionAndOtherPostretirementDefinedBenefitPlansLiabilitiesNoncurrent63.169.070.578.7
Percentage of Assets8.310.513.020.5
Percentage of Assets us-gaap:PensionPlansDefinedBenefit0.00.00.00.0

Other Liabilities Noncurrent

us-gaap:OtherLiabilitiesNoncurrent



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302009-12-31
Value1666138613782025139511322517236523202111200118851822187819562015209118912465232224572128194617351712171117091680169416491711160614891419142413831386153315221222
Percentage of OtherLiabilitiesNoncurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets2.42.12.23.22.31.94.64.24.34.03.93.63.53.73.83.93.93.64.64.44.63.93.73.33.33.33.73.73.83.73.93.63.43.33.33.23.23.53.52.8

Stockholders Equity

us-gaap:StockholdersEquity



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302009-12-312008-12-31
Value1430915358150681395812911136871370412856125571391014001134791294512287125101181011252108501034595639046881312296122031164111643137-1184-1943-2131-48-1135-1011-13961222785758897715245874
Percentage of StockholdersEquity100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets20.823.823.822.320.922.724.923.023.226.127.026.025.224.024.622.921.120.419.318.116.816.323.723.422.322.30.3-2.6-4.3-4.8-0.1-2.5-2.3-3.22.81.81.72.11.70.60.0

us-gaap:StatementEquityComponents

dal:AccumulatedNetGainLossAndAdjustmentOther



Period End2020-03-312019-12-312019-03-312018-12-31
Value12710699100
Percentage of StockholdersEquity0.90.70.80.7
Percentage of Assets0.20.20.20.2
Percentage of Assets dal:AccumulatedNetGainLossAndAdjustmentOther0.00.00.00.0

us-gaap:AccumulatedDefinedBenefitPlansAdjustment



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302014-12-312013-12-31
Value-8025-8095-7748-7795-7865-7925-7635-7701-7761-7812-7592-7631-7673-7714-7243-7282-7318-7354-7403-7442-7517-5323
Percentage of StockholdersEquity-56.1-52.7-51.4-55.8-60.9-57.9-55.7-59.9-61.8-56.2-54.2-56.6-59.3-62.8-57.9-61.7-65.0-67.8-71.6-77.8-85.3-45.7
Percentage of Assets-11.7-12.5-12.3-12.5-12.7-13.2-13.9-13.8-14.4-14.7-14.6-14.7-14.9-15.0-14.2-14.1-13.7-13.8-13.8-14.1-13.9-10.2
Percentage of Assets us-gaap:AccumulatedDefinedBenefitPlansAdjustment0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:AccumulatedNetGainLossFromDesignatedOrQualifyingCashFlowHedges



Period End2019-12-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302014-12-312013-12-31
Value10610010095807067768197464889140155189222219
Percentage of StockholdersEquity0.70.70.70.70.60.50.50.60.60.80.40.40.81.31.52.02.51.9
Percentage of Assets0.20.20.20.20.10.10.10.10.20.20.10.10.20.30.30.40.40.4
Percentage of Assets us-gaap:AccumulatedNetGainLossFromDesignatedOrQualifyingCashFlowHedges0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:AccumulatedNetUnrealizedInvestmentGainLoss



Period End2019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302014-12-312013-12-31
Value0000000012149621-19-15-45-50-61-68-35-16-26
Percentage of StockholdersEquity0.00.00.00.00.00.00.00.00.90.30.00.2-0.2-0.1-0.4-0.4-0.6-0.7-0.4-0.2-0.2
Percentage of Assets0.00.00.00.00.00.00.00.00.20.10.00.0-0.0-0.0-0.1-0.1-0.1-0.1-0.1-0.0-0.0
Percentage of Assets us-gaap:AccumulatedNetUnrealizedInvestmentGainLoss0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:AccumulatedOtherComprehensiveIncome



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302014-12-312013-12-312012-12-312011-12-312010-12-312009-12-312008-12-31
Value-7898-7989-7645-7694-7766-7825-7535-7606-7681-7621-7476-7549-7571-7636-7212-7279-7279-7275-7316-7288-7311-5130-8577-6766-3578-3563-4080
Percentage of StockholdersEquity-55.2-52.0-50.7-55.1-60.2-57.2-55.0-59.2-61.2-54.8-53.4-56.0-58.5-62.1-57.6-61.6-64.7-67.1-70.7-76.2-83.0-44.1402.5484.7-398.9-1454.3-466.8
Percentage of Assets-11.5-12.4-12.1-12.3-12.6-13.0-13.7-13.6-14.2-14.3-14.4-14.6-14.7-14.9-14.2-14.1-13.6-13.7-13.6-13.8-13.5-9.8-19.3-15.6-8.3-8.20.0
Percentage of Assets us-gaap:AccumulatedOtherComprehensiveIncome0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:AdditionalPaidInCapital



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-312010-12-312009-12-312008-12-31
Value11054111291117711201112541167111740118071196712053122941087512981139821406913999139261382713714
Percentage of StockholdersEquity77.372.574.280.287.285.385.791.895.386.6100.1100.2147.3120.1-660.2-1002.81552.55643.71569.1
Percentage of Assets16.117.217.717.918.219.421.321.222.122.624.020.524.026.831.632.232.231.80.0
Percentage of Assets us-gaap:AdditionalPaidInCapital0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:RetainedEarnings



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-312010-12-312009-12-312008-12-31
Value1142312454117721068696561003994838629823096367903762334563049-7389-8398-9252-9845-8608
Percentage of StockholdersEquity79.881.178.176.674.873.369.267.165.569.364.370.339.226.2346.7601.6-1031.4-4018.4-984.9
Percentage of Assets16.619.318.617.115.616.717.215.515.218.115.414.36.45.8-16.6-19.3-21.4-22.60.0
Percentage of Assets us-gaap:RetainedEarnings0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:TreasuryStock



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-312010-12-312009-12-312008-12-31
Value-270-236-236-235-233-198-197-196-194-158-274-373-313-258-234-231-199-174-152
Percentage of StockholdersEquity-1.9-1.5-1.6-1.7-1.8-1.4-1.4-1.5-1.5-1.1-2.2-3.4-3.6-2.211.016.5-22.2-71.0-17.4
Percentage of Assets-0.4-0.4-0.4-0.4-0.4-0.3-0.4-0.4-0.4-0.3-0.5-0.7-0.6-0.5-0.5-0.5-0.5-0.40.0
Percentage of Assets us-gaap:TreasuryStock0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

Common Stock Value

Retained Earnings Accumulated Deficit

us-gaap:RetainedEarningsAccumulatedDeficit



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302009-12-31
Value114231245411772106869656100399696885184659636950289058226790311109100008462762367485540412734564244396232113049-5379-6748-7382-7389-7395-8442-8274-8398-8823-9372-9570-9252-9271-9845
Percentage of RetainedEarningsAccumulatedDeficit100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets16.619.318.617.115.616.717.615.915.718.118.317.216.015.421.819.415.914.312.610.57.76.48.27.66.25.8-11.7-14.7-16.4-16.6-16.7-18.9-18.7-19.3-20.5-21.4-21.8-21.4-21.5-22.6

Treasury Stock Value

us-gaap:TreasuryStockValue



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302009-12-31
Value270236236235233198197196194158158156153274274272270373372370365313312309307258256255255234234234234231214214214199198174
Percentage of TreasuryStockValue100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets0.40.40.40.40.40.30.40.40.40.30.30.30.30.50.50.50.50.70.70.70.70.60.60.60.60.50.60.60.60.50.50.50.50.50.50.50.50.50.50.4

Accumulated Other Comprehensive Income Loss Net Of Tax

us-gaap:AccumulatedOtherComprehensiveIncomeLossNetOfTax



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302009-12-312008-12-31
Value-7898-7989-7645-7694-7766-7825-7535-7606-7681-7621-7476-7549-7571-7636-7212-7279-7279-7275-7316-7288-7294-7311-5100-5137-5139-5130-8324-8331-8426-8577-6464-6490-6518-6766-3724-3593-3403-3578-3716-3563-4080
Percentage of AccumulatedOtherComprehensiveIncomeLossNetOfTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets-11.5-12.4-12.1-12.3-12.6-13.0-13.7-13.6-14.2-14.3-14.4-14.6-14.7-14.9-14.2-14.1-13.6-13.7-13.6-13.8-13.6-13.5-9.8-9.8-9.9-9.8-18.1-18.2-18.7-19.3-14.6-14.5-14.8-15.6-8.7-8.2-7.8-8.3-8.6-8.20.0

Net Cash Provided By Used In Operating Activities

us-gaap:NetCashProvidedByUsedInOperatingActivities



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-09-302015-06-302015-03-312014-12-312014-09-302014-03-312013-03-312012-03-312011-03-312010-03-31
Value3589572245327219511364150028071343191816452386-801112518543215101120672745163658213589511004831788966
Percentage of NetCashProvidedByUsedInOperatingActivities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax4.28.417.926.118.612.712.523.813.518.714.922.2-8.811.917.730.810.918.625.617.46.012.110.711.89.910.214.1

Net Cash Provided By Used In Investing Activities

us-gaap:NetCashProvidedByUsedInInvestingActivities



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-09-302015-06-302015-03-312014-12-312014-09-302014-03-312013-03-312012-03-312011-03-312010-03-31
Value-2971-767-1125-1566-1105-1012-909-1545-927-1332-1322-978-1734445-887-1112-601-1009-955-812-38-1583-563-630-349-576-293
Percentage of NetCashProvidedByUsedInInvestingActivities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax-34.6-6.7-9.0-12.5-10.6-9.4-7.6-13.1-9.3-13.0-12.0-9.1-19.04.7-8.5-10.6-6.5-9.1-8.9-8.6-0.4-14.2-6.3-7.4-4.1-7.4-4.3

Net Cash Provided By Used In Financing Activities

us-gaap:NetCashProvidedByUsedInFinancingActivities



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-09-302015-06-302015-03-312014-12-312014-09-302014-03-312013-03-312012-03-312011-03-312010-03-31
Value5344842-1451-1662-609-252-1203516-787-250-1086-10741680-446-991-2149-674-982-1619-790-966-627-533-154-228-223-367
Percentage of NetCashProvidedByUsedInFinancingActivities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax62.27.4-11.6-13.3-5.8-2.3-10.14.4-7.9-2.4-9.8-10.018.4-4.7-9.5-20.6-7.3-8.8-15.1-8.4-10.0-5.6-6.0-1.8-2.7-2.9-5.4

Net Cash Provided By Used In Operating Activities

us-gaap:NetCashProvidedByUsedInOperatingActivities



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-09-302015-06-302015-03-312014-12-312014-09-302014-03-312013-03-312012-03-312011-03-312010-03-31
Value3589572245327219511364150028071343191816452386-801112518543215101120672745163658213589511004831788966
Percentage of NetCashProvidedByUsedInOperatingActivities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax4.28.417.926.118.612.712.523.813.518.714.922.2-8.811.917.730.810.918.625.617.46.012.110.711.89.910.214.1

Net Income Loss

us-gaap:NetIncomeLoss



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-09-30
Value-534109914951443730101913121025547572117812246036221259154694698013151485746-71235780121384791369685771047-168124425549198-31819363467-256-161
Percentage of NetIncomeLoss100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax-6.29.611.911.57.09.511.08.75.55.610.711.46.66.612.014.810.210.311.813.97.9-7.43.27.52.493.413.17.10.10.110.6-1.71.55.15.62.2-4.10.24.15.7-3.70.0

us-gaap:StatementEquityComponents

us-gaap:RetainedEarnings



Period End2020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-31
Value-5341495144373013221036557
Percentage of NetIncomeLoss100.0100.0100.0100.0100.8101.1101.8
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax-6.211.911.57.011.18.85.6
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:RetainedEarnings0.00.00.00.00.00.00.0

Depreciation Depletion And Amortization

us-gaap:DepreciationDepletionAndAmortization



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-31
Value678621631713615549580590610586574535540472474470486466448470438440451442
Percentage of DepreciationDepletionAndAmortization100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ConsolidationItems

us-gaap:IntersegmentElimination



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value-25-99000-67000
Percentage of DepreciationDepletionAndAmortization-3.7-15.90.00.00.0-12.20.00.00.0

us-gaap:ConsolidationItems, us-gaap:StatementBusinessSegments

us-gaap:OperatingSegments, dal:Airline



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-31
Value678695606688592530564573595571563524530460464461477444458440463
Percentage of DepreciationDepletionAndAmortization100.0111.996.096.596.396.597.297.197.597.498.197.998.197.597.998.198.10.098.398.298.5

us-gaap:OperatingSegments, dal:Refinery



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-31
Value252525252319161715151111101210997887
Percentage of DepreciationDepletionAndAmortization3.74.04.03.53.73.52.82.92.52.61.92.11.92.52.11.91.90.01.71.81.5

Increase Decrease In Other Operating Capital Net

Increase Decrease In Inventories

Net Cash Provided By Used In Investing Activities

us-gaap:NetCashProvidedByUsedInInvestingActivities



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-09-302015-06-302015-03-312014-12-312014-09-302014-03-312013-03-312012-03-312011-03-312010-03-31
Value-2971-767-1125-1566-1105-1012-909-1545-927-1332-1322-978-1734445-887-1112-601-1009-955-812-38-1583-563-630-349-576-293
Percentage of NetCashProvidedByUsedInInvestingActivities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax-34.6-6.7-9.0-12.5-10.6-9.4-7.6-13.1-9.3-13.0-12.0-9.1-19.04.7-8.5-10.6-6.5-9.1-8.9-8.6-0.4-14.2-6.3-7.4-4.1-7.4-4.3

Payments To Acquire Investments

Net Cash Provided By Used In Financing Activities

us-gaap:NetCashProvidedByUsedInFinancingActivities



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-09-302015-06-302015-03-312014-12-312014-09-302014-03-312013-03-312012-03-312011-03-312010-03-31
Value5344842-1451-1662-609-252-1203516-787-250-1086-10741680-446-991-2149-674-982-1619-790-966-627-533-154-228-223-367
Percentage of NetCashProvidedByUsedInFinancingActivities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax62.27.4-11.6-13.3-5.8-2.3-10.14.4-7.9-2.4-9.8-10.018.4-4.7-9.5-20.6-7.3-8.8-15.1-8.4-10.0-5.6-6.0-1.8-2.7-2.9-5.4

Proceeds From Issuance Of Long Term Debt

us-gaap:ProceedsFromIssuanceOfLongTermDebt



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-08-312015-09-302015-06-302015-03-312014-12-312014-09-302014-03-312013-06-302013-03-312012-03-312011-03-312010-03-31
Value396215570050062103124045000200400045050099704140707590002450
Percentage of ProceedsFromIssuanceOfLongTermDebt100.0100.00.00.0100.0100.00.0100.00.0100.00.00.0100.00.00.00.0100.0100.0100.00.0100.0100.0100.0100.00.00.00.0100.00.0

Payments Of Dividends

us-gaap:PaymentsOfDividends



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-09-302015-06-302015-03-312014-12-312014-09-302014-03-312013-06-302013-03-31
Value260259260228233239240213217215219148149149150103107107727575755100
Percentage of PaymentsOfDividends100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.00.0

Payments Of Dividends

us-gaap:PaymentsOfDividends



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-09-302015-06-302015-03-312014-12-312014-09-302014-03-312013-06-302013-03-31
Value260259260228233239240213217215219148149149150103107107727575755100
Percentage of PaymentsOfDividends100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.00.0

Payments For Repurchase Of Common Stock

us-gaap:PaymentsForRepurchaseOfCommonStock



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-09-302015-06-302015-03-312014-12-312014-09-302014-03-312013-06-302013-03-31
Value3442252092681325325325600325327550600200300500102677542592542550025012500
Percentage of PaymentsForRepurchaseOfCommonStock100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.00.0

Debt Instrument Interest Rate Stated Percentage

Effective Income Tax Rate Continuing Operations

Share Based Compensation

Deferred Tax Liabilities

us-gaap:DeferredTaxLiabilities



Period End2019-12-312012-12-312011-12-312010-12-31
Value1336686671547011
Percentage of DeferredTaxLiabilities100.0100.0100.0100.0

Deferred Tax Assets Net

us-gaap:DeferredTaxAssetsNet



Period End2019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-312010-12-31
Value63006841611510702124561438613870528255875442
Percentage of DeferredTaxAssetsNet100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Unrecognized Tax Benefits

Deferred Tax Assets Valuation Allowance

us-gaap:DeferredTaxAssetsValuationAllowance



Period End2019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-312010-12-31
Value58131940564617710963107059632
Percentage of DeferredTaxAssetsValuationAllowance100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Unrecognized Tax Benefits Increases Resulting From Current Period Tax Positions

Operating Lease Right Of Use Asset

us-gaap:OperatingLeaseRightOfUseAsset



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312017-12-31
Value5488562758155906603659940
Percentage of OperatingLeaseRightOfUseAsset100.0100.0100.0100.0100.0100.00.0

Cash And Cash Equivalents Period Increase Decrease

Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents

us-gaap:CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312015-12-31
Value646137302698302929852748264832601482185315172305196828262026
Percentage of CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Proceeds From Repayments Of Short Term Debt

Proceeds From Sale Of Short Term Investments

dal:AncillaryBusinessesAndRefineryExpenses



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value219300279316351299410494493520387296292
Percentage of AncillaryBusinessesAndRefineryExpenses100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:StatementScenario

dal:ExpectedYearOverYearDecreaseInSystemCapacityPercentage

srt:ScenarioForecast



Period End2020-06-30
Value0.85
Percentage of ExpectedYearOverYearDecreaseInSystemCapacityPercentage100.0

us-gaap:StatementScenario, us-gaap:AirlineDestinations

srt:ScenarioForecast, dal:InternationalDestination



Period End2020-06-30
Value0.9
Percentage of ExpectedYearOverYearDecreaseInSystemCapacityPercentage105.9

srt:ScenarioForecast, us-gaap:DomesticDestination



Period End2020-06-30
Value0.8
Percentage of ExpectedYearOverYearDecreaseInSystemCapacityPercentage94.1

dal:LoyaltyProgramLiabilityMileageCreditsEarned



Period End2020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-31
Value660810822720772819731
Percentage of LoyaltyProgramLiabilityMileageCreditsEarned100.0100.0100.0100.0100.0100.0100.0

dal:LoyaltyProgramLiabilityNonTravelMileageCreditsRedeemed



Period End2020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-31
Value28364145434240
Percentage of LoyaltyProgramLiabilityNonTravelMileageCreditsRedeemed100.0100.0100.0100.0100.0100.0100.0

dal:LoyaltyProgramLiabilityTravelMileageCreditsRedeemed



Period End2020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-31
Value543732751692678680618
Percentage of LoyaltyProgramLiabilityTravelMileageCreditsRedeemed100.0100.0100.0100.0100.0100.0100.0

us-gaap:AircraftType, us-gaap:CounterpartyName

dal:NumberOfAircraftAssumed

dal:A350900, dal:LATAMAirlinesGroupS.A.



Period End2020-03-31
Value10.0
Percentage of NumberOfAircraftAssumed100.0

us-gaap:AircraftType, us-gaap:CounterpartyName, us-gaap:UnrecordedUnconditionalPurchaseObligationByCategoryOfItemPurchased

dal:A350900, dal:LATAMAirlinesGroupS.A., us-gaap:CapitalAdditions



Period End2020-03-31
Value10.0
Percentage of NumberOfAircraftAssumed100.0

dal:NumberOfAircraftRemovedFromActiveService



Period End2020-03-31
Value400.0
Percentage of NumberOfAircraftRemovedFromActiveService100.0

us-gaap:StatementScenario

srt:ScenarioForecast



Period End2020-06-30
Value250.0
Percentage of NumberOfAircraftRemovedFromActiveService0.0

dal:OperatingLeaseObligationIncurred



Period End2019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value510283274133332215361
Percentage of OperatingLeaseObligationIncurred100.0100.0100.0100.0100.0100.0100.0100.0

dal:SalesOfMileageCredits



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value992110011001020980900900859841900800743757
Percentage of SalesOfMileageCredits100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:StatementEquityComponents

dal:StockholdersEquityIncreaseDecreaseFromCommonStockIssuedAndCompensationExpenseFromEquityAwardsNetOfTreasurySharesWithheldForTaxesShares

us-gaap:CommonStock



Period End2020-03-312019-03-31
Value12
Percentage of StockholdersEquityIncreaseDecreaseFromCommonStockIssuedAndCompensationExpenseFromEquityAwardsNetOfTreasurySharesWithheldForTaxesShares100.0100.0

dal:StockholdersEquityIncreaseDecreaseFromCommonStockIssuedAndCompensationExpenseFromEquityAwardsNetOfTreasurySharesWithheldForTaxesValue



Period End2020-03-312019-03-31
Value-5-8
Percentage of StockholdersEquityIncreaseDecreaseFromCommonStockIssuedAndCompensationExpenseFromEquityAwardsNetOfTreasurySharesWithheldForTaxesValue100.0100.0

us-gaap:StatementEquityComponents

us-gaap:AdditionalPaidInCapital



Period End2020-03-312019-03-31
Value2927
Percentage of StockholdersEquityIncreaseDecreaseFromCommonStockIssuedAndCompensationExpenseFromEquityAwardsNetOfTreasurySharesWithheldForTaxesValue-580.0-337.5

us-gaap:TreasuryStock



Period End2020-03-312019-03-31
Value-34-35
Percentage of StockholdersEquityIncreaseDecreaseFromCommonStockIssuedAndCompensationExpenseFromEquityAwardsNetOfTreasurySharesWithheldForTaxesValue680.0437.5

dal:WeightedAveragePricePerTreasuryShareWithheldForTaxes



Period End2020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-31
Value56.4858.6855.0649.7552.5952.9955.08
Percentage of WeightedAveragePricePerTreasuryShareWithheldForTaxes100.0100.0100.0100.0100.0100.0100.0

us-gaap:AircraftMaintenanceMaterialsAndRepairs



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-312012-09-302012-06-302012-03-312011-09-302011-06-302011-03-312010-09-302010-06-30
Value469417424434476342371427435496503475518466462446449479499452474440466448474472491493548561428485485405395
Percentage of AircraftMaintenanceMaterialsAndRepairs100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:AircraftRental



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-312012-09-302012-06-302012-03-312011-09-302011-06-302011-03-312010-09-302010-06-30
Value10010511010710210399979492898684817266666360606165565147556065687572747892101
Percentage of AircraftRental100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:AirlineCapacityPurchaseArrangements



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-312012-09-302012-06-302012-03-312011-09-302011-06-302011-03-312010-09-302010-06-30
Value9028869009058937959038838561156115610811110109011191096100610731097105312041353136113191459144413991447141613751432141013001236972
Percentage of AirlineCapacityPurchaseArrangements100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:CapitalLeaseObligationsIncurred



Period End2019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-09-302015-06-302015-03-312014-12-312014-09-302014-03-312013-09-302013-06-302013-03-312011-03-312010-03-31
Value3146115537367501241221863152327392639001000066120
Percentage of CapitalLeaseObligationsIncurred100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.00.0100.00.00.00.0100.0100.0

us-gaap:CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value27311032-33144237100-6121778-371336-788337-858
Percentage of CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:CommonStockDividendsPerShareDeclared



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-31
Value0.40.40999999999999990.40.350.350.35000000000000010.350.310.310.310000000000000050.310.20.20.207500000000000070.20250.1350.1350.1350.090.090.090.090.060.060.060.060.00.0
Percentage of CommonStockDividendsPerShareDeclared100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.00.0

us-gaap:CostOfServicesCatering



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-31
Value257313345322271286329300263261315271220233264221189247227190195227215173
Percentage of CostOfServicesCatering100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:RetirementPlanType

us-gaap:DefinedBenefitPlanAmortizationOfGainsLosses

us-gaap:OtherPostretirementBenefitPlansDefinedBenefit



Period End2020-03-312019-03-31
Value-10-9
Percentage of DefinedBenefitPlanAmortizationOfGainsLosses100.0100.0

us-gaap:PensionPlansDefinedBenefit



Period End2020-03-312019-03-31
Value-75-73
Percentage of DefinedBenefitPlanAmortizationOfGainsLosses750.0811.1

us-gaap:RetirementPlanType

us-gaap:DefinedBenefitPlanAmortizationOfPriorServiceCostCredit

us-gaap:OtherPostretirementBenefitPlansDefinedBenefit



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-30
Value-2-2-2-2-2-4-7-7-7-5-7-7-7-5-7
Percentage of DefinedBenefitPlanAmortizationOfPriorServiceCostCredit100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:RetirementPlanType

us-gaap:DefinedBenefitPlanExpectedReturnOnPlanAssets

us-gaap:OtherPostretirementBenefitPlansDefinedBenefit



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-30
Value111112121217171717181717172018
Percentage of DefinedBenefitPlanExpectedReturnOnPlanAssets100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:PensionPlansDefinedBenefit



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-30
Value343296297296297330329329329285286286286224226
Percentage of DefinedBenefitPlanExpectedReturnOnPlanAssets3118.22690.92475.02466.72475.01941.21935.31935.31935.31583.31682.41682.41682.41120.01255.6

us-gaap:RetirementPlanType

us-gaap:DefinedBenefitPlanInterestCost

us-gaap:OtherPostretirementBenefitPlansDefinedBenefit



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-30
Value283534343431323232333535353637
Percentage of DefinedBenefitPlanInterestCost100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:PensionPlansDefinedBenefit



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-30
Value175208208208208195195195195214213213213230229
Percentage of DefinedBenefitPlanInterestCost625.0594.3611.8611.8611.8629.0609.4609.4609.4648.5608.6608.6608.6638.9618.9

us-gaap:RetirementPlanType

us-gaap:DefinedBenefitPlanNetPeriodicBenefitCost

us-gaap:OtherPostretirementBenefitPlansDefinedBenefit



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-30
Value4950505050-13393939394141413435
Percentage of DefinedBenefitPlanNetPeriodicBenefitCost100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:PensionPlansDefinedBenefit



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-30
Value-93-14-14-14-16-67-68-64-68-4-7-7-76562
Percentage of DefinedBenefitPlanNetPeriodicBenefitCost-189.8-28.0-28.0-28.0-32.0515.4-174.4-164.1-174.4-10.3-17.1-17.1-17.1191.2177.1

us-gaap:RetirementPlanType

us-gaap:DefinedBenefitPlanRecognizedNetGainLossDueToSettlements1

us-gaap:PensionPlansDefinedBenefit



Period End2019-12-312019-09-302019-06-302018-12-312018-09-302018-06-302017-12-312017-09-302017-06-30
Value-2-2-200-4-300
Percentage of DefinedBenefitPlanRecognizedNetGainLossDueToSettlements1100.0100.0100.00.00.0100.0100.00.00.0

us-gaap:RetirementPlanType

us-gaap:DefinedBenefitPlanServiceCost

us-gaap:OtherPostretirementBenefitPlansDefinedBenefit



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-30
Value242021212121212121212222221717
Percentage of DefinedBenefitPlanServiceCost100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

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

us-gaap:DerivativeGainLossOnDerivativeNet

us-gaap:EnergyRelatedDerivative, us-gaap:Nondesignated, dal:AircraftFuelAndRelatedTaxes



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value216-363119-541377-942
Percentage of DerivativeGainLossOnDerivativeNet100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ForeignExchangeContract, us-gaap:Nondesignated, us-gaap:GainLossOnInvestmentsMember1



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value19-1518-3118-1922-16
Percentage of DerivativeGainLossOnDerivativeNet8.841.758.1-15.8-20.45.8-271.4-23.4-800.0

us-gaap:HedgingDesignation

us-gaap:Nondesignated



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value235-514916-43145-12-72-14
Percentage of DerivativeGainLossOnDerivativeNet108.8141.7158.184.279.6105.8-171.476.6-700.0

us-gaap:DerivativeInstrumentRisk, us-gaap:HedgingDesignation

us-gaap:DerivativeNonmonetaryNotionalAmountVolume

us-gaap:EnergyRelatedDerivative, us-gaap:Nondesignated



Period End2020-03-31
Value219
Percentage of DerivativeNonmonetaryNotionalAmountVolume100.0

us-gaap:Dividends



Period End2020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-31
Value257261229232242213216
Percentage of Dividends100.0100.0100.0100.0100.0100.0100.0

us-gaap:StatementEquityComponents

us-gaap:RetainedEarnings



Period End2020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-31
Value257261229232242213216
Percentage of Dividends100.0100.0100.0100.0100.0100.0100.0

us-gaap:FuelCosts



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-312012-09-302012-06-302012-03-312011-09-302011-06-302011-03-312010-09-302010-06-302010-03-312009-09-30
Value1595201122392291197823272498234118561526151914481240125614221228122718191457183540562952243422262291259522892221330522332881266321662023196016831973
Percentage of FuelCosts100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:GainLossOnInvestments



Period 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-112136-35-8210018550-23818000
Percentage of GainLossOnInvestments100.0100.0100.0100.0100.0100.0100.0100.0100.00.00.00.0

us-gaap:IncrementalCommonSharesAttributableToShareBasedPaymentArrangements



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-312012-09-302012-06-302012-03-312011-09-302011-06-302011-03-312010-09-302010-06-30
Value002221222033304567880999109740466078
Percentage of IncrementalCommonSharesAttributableToShareBasedPaymentArrangements0.00.0100.0100.0100.0100.0100.0100.0100.00.0100.0100.0100.00.0100.0100.0100.0100.0100.0100.00.0100.0100.0100.0100.0100.0100.0100.00.0100.0100.0100.00.0100.0100.0

us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName, us-gaap:IndefiniteLivedIntangibleAssetsByMajorClass

us-gaap:IndefinitelivedIntangibleAssetsAcquired

dal:LATAMAirlinesGroupS.A., dal:AirlineAlliances



Period End2020-01-31
Value1200
Percentage of IndefinitelivedIntangibleAssetsAcquired100.0

us-gaap:InterestIncomeExpenseNet



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-312012-09-302012-06-302012-03-312011-09-302011-06-302011-03-312010-09-30
Value-79-73-70-75-83-37-84-89-102-99-100-103-94-93-95-93-107-121-127-131-190-140-155-165-176-172-178-195-207-221-229-233-221-249
Percentage of InterestIncomeExpenseNet100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ConsolidationItems, us-gaap:StatementBusinessSegments

us-gaap:OperatingSegments, dal:Airline



Period 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-80-80-70-84-92-37-94-97-97-106-100-103
Percentage of InterestIncomeExpenseNet101.3109.6100.0112.0110.8100.0111.9109.095.1107.1100.0100.0

us-gaap:OperatingSegments, dal:Refinery



Period 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
Value1709901085700
Percentage of InterestIncomeExpenseNet-1.3-9.6-0.0-12.0-10.8-0.0-11.9-9.0-4.9-7.1-0.0-0.0

us-gaap:LaborAndRelatedExpense



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-312012-09-302012-06-302012-03-312011-09-302011-06-302011-03-312010-09-302010-06-302010-03-312009-09-30
Value2771295028842752263927392753266825842632271526162473286924632391231122762195209220362069204619691976192219111850182517631717173917271669170216721722
Percentage of LaborAndRelatedExpense100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:LandingFeesAndOtherRentals



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-312012-09-302012-06-302012-03-312011-09-302011-06-302011-03-312010-09-302010-06-30
Value467441460442419461421407373384400379365367399376348403388373353393355341378359323360347305342320313331324
Percentage of LandingFeesAndOtherRentals100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OtherComprehensiveIncomeLossBeforeReclassificationsNetOfTax



Period End2020-03-312019-03-312016-03-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-31
Value21-2-25-23-410-221141-117
Percentage of OtherComprehensiveIncomeLossBeforeReclassificationsNetOfTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:StatementEquityComponents

dal:AccumulatedNetGainLossAndAdjustmentOther



Period End2020-03-312019-03-31
Value21-2
Percentage of OtherComprehensiveIncomeLossBeforeReclassificationsNetOfTax100.0100.0

us-gaap:AccumulatedDefinedBenefitPlansAdjustment



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-31
Value0-410-1860-3071300-264000-482000000-2267000
Percentage of OtherComprehensiveIncomeLossBeforeReclassificationsNetOfTax0.00.00.00.0-0.00.00.00.00.00.00.00.00.00.00.00.0-0.0-0.0-0.00.0102.50.0-0.00.0

us-gaap:AccumulatedNetUnrealizedInvestmentGainLoss



Period End2019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-31
Value000000007244-1648-430511-33-7-126-15910
Percentage of OtherComprehensiveIncomeLossBeforeReclassificationsNetOfTax0.00.00.0-0.00.00.00.00.00.00.00.00.00.00.00.0-44.0143.5175.0-120.0-0.3-36.6-81.8142.9

us-gaap:OtherComprehensiveIncomeLossNetOfTax



Period End2020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-31
Value91497259717546
Percentage of OtherComprehensiveIncomeLossNetOfTax100.0100.0100.0100.0100.0100.0100.0

us-gaap:StatementEquityComponents

us-gaap:AccumulatedOtherComprehensiveIncome



Period End2020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-31
Value91497259717546
Percentage of OtherComprehensiveIncomeLossNetOfTax100.0100.0100.0100.0100.0100.0100.0

us-gaap:OtherComprehensiveIncomeLossTax



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-09-302015-06-302015-03-312013-03-312012-03-312011-09-302011-06-302011-03-31
Value3-131-43-1-9453-2-3610-1-525012220621300000
Percentage of OtherComprehensiveIncomeLossTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.00.00.00.00.0

us-gaap:OtherCostAndExpenseOperating



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-312012-09-302012-06-302012-03-312011-09-302011-06-302011-03-312010-09-302010-06-302010-03-312009-09-30
Value511454476413429418455437410656593533467481527485493565548492495515408379439365356421396416424412429433403376400
Percentage of OtherCostAndExpenseOperating100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OtherLaborRelatedExpenses



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-312012-09-302012-06-302012-03-312011-09-302011-06-302010-09-302010-06-30
Value038751751822032339540018326231433815119332632427256341113626238434099249118201741350167818590
Percentage of OtherLaborRelatedExpenses0.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0100.0100.0100.0100.0

us-gaap:PaymentsForFlightEquipment



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-09-302015-06-302015-03-312014-12-312014-09-302014-03-312013-03-312012-03-312011-03-31
Value629570548116710598715701272991799613697595468505880764406726451483322514527-308-274
Percentage of PaymentsForFlightEquipment100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:PaymentsForProceedsFromOtherInvestingActivities



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-09-302015-06-302015-03-312014-12-312014-09-302014-03-312013-03-312012-03-312011-03-312010-03-31
Value-65-26100-83-49-67-16-33-38-146-5-145410-22-14-5-4-14-310-21-402932-438
Percentage of PaymentsForProceedsFromOtherInvestingActivities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:PaymentsToAcquireLongtermInvestments



Period End2020-03-312019-03-31
Value20990
Percentage of PaymentsToAcquireLongtermInvestments100.00.0

us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName

dal:LATAMAirlinesGroupS.A.



Period End2020-01-31
Value1900
Percentage of PaymentsToAcquireLongtermInvestments0.0

us-gaap:PaymentsToAcquireOtherProductiveAssets



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-09-302015-06-302015-03-312014-12-312014-09-302014-03-312013-03-312012-03-312011-03-312010-03-31
Value308502396393301484397309274361328291207326175166107156193135177135100120-996642
Percentage of PaymentsToAcquireOtherProductiveAssets100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:PaymentsToAcquireProductiveAssets



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-31
Value93710729461560136013559671580126511609419888027946801046871562919586660457518614631338647
Percentage of PaymentsToAcquireProductiveAssets100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ConsolidationItems, us-gaap:StatementBusinessSegments

us-gaap:OperatingSegments, dal:Airline



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-31
Value92610449361552135012599281567125011389019287767346521026858832536906579
Percentage of PaymentsToAcquireProductiveAssets98.897.498.999.599.392.996.099.298.898.195.793.996.892.495.998.198.50.095.498.698.8

us-gaap:OperatingSegments, dal:Refinery



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-31
Value1128108109639131522406026602820134626137
Percentage of PaymentsToAcquireProductiveAssets1.22.61.10.50.77.14.00.81.21.94.36.13.27.64.11.91.50.04.61.41.2

us-gaap:LongtermDebtType

us-gaap:ProceedsFromLinesOfCredit

us-gaap:RevolvingCreditFacility



Period End2020-03-31
Value3000
Percentage of ProceedsFromLinesOfCredit100.0

us-gaap:ProceedsFromPaymentsForOtherFinancingActivities



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-09-302015-06-302015-03-312014-12-312014-09-302014-03-312013-03-312012-03-312011-03-312010-03-31
Value-22-139-1-16-66544210-62-57-21777-3489331-3013-1-5-4-32-81
Percentage of ProceedsFromPaymentsForOtherFinancingActivities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ProceedsFromSaleMaturityAndCollectionOfShorttermInvestments



Period End2020-03-312019-03-31
Value0206
Percentage of ProceedsFromSaleMaturityAndCollectionOfShorttermInvestments0.0100.0

us-gaap:ProceedsFromShortTermDebt



Period End2020-03-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-03-312016-12-312016-09-302016-06-302016-03-312015-09-302015-06-302015-03-31
Value2882001750700001430068000
Percentage of ProceedsFromShortTermDebt100.00.00.0100.0100.00.00.00.00.0100.00.00.0100.00.00.00.0

us-gaap:ProfessionalAndContractServicesExpense



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-312012-09-302012-06-302012-03-312011-09-302011-06-302011-03-312010-09-30
Value675667685657632529562540544557561543523511520484476477457441423459440427429409401402397378419415425398
Percentage of ProfessionalAndContractServicesExpense100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ReclassificationFromAccumulatedOtherComprehensiveIncomeCurrentPeriodNetOfTax



Period End2020-03-312019-03-312016-03-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-30
Value-70-61-215-10-714-4-1916-4780
Percentage of ReclassificationFromAccumulatedOtherComprehensiveIncomeCurrentPeriodNetOfTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0

us-gaap:StatementEquityComponents

dal:AccumulatedNetGainLossAndAdjustmentOther



Period End2020-03-312019-03-31
Value0.0-1000000.0
Percentage of ReclassificationFromAccumulatedOtherComprehensiveIncomeCurrentPeriodNetOfTax-0.01.6

us-gaap:AccumulatedDefinedBenefitPlansAdjustment



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-31
Value-70-63-65-64-60-17-53-60-51-44-39-42-41-11-39-36-36-39-36-39-25-18-18-12
Percentage of ReclassificationFromAccumulatedOtherComprehensiveIncomeCurrentPeriodNetOfTax100.00.00.00.098.40.00.00.00.00.00.00.00.00.00.00.0171.4-780.0360.0557.1-178.6450.094.7-75.0

us-gaap:AccumulatedNetUnrealizedInvestmentGainLoss



Period End2019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-31
Value0000000001-1800000000000
Percentage of ReclassificationFromAccumulatedOtherComprehensiveIncomeCurrentPeriodNetOfTax0.00.00.0-0.00.00.00.00.00.00.00.00.00.00.00.0-0.00.0-0.0-0.00.0-0.0-0.00.0

us-gaap:ReclassificationFromAociCurrentPeriodTax



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312015-12-312015-09-302014-09-30
Value-21-19-19-19-19-6-16-20-15-27-23-23-17-6-23-32
Percentage of ReclassificationFromAociCurrentPeriodTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:RepaymentsOfLongTermDebtAndCapitalSecurities



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-09-302015-06-302015-03-312014-12-312014-09-302014-03-312013-03-312012-03-312011-03-31
Value123851535511651285311648184924443925527628830625469045915173333014431008412299-367-460
Percentage of RepaymentsOfLongTermDebtAndCapitalSecurities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:RightOfUseAssetObtainedInExchangeForFinanceLeaseLiability



Period End2020-03-312019-03-31
Value1843
Percentage of RightOfUseAssetObtainedInExchangeForFinanceLeaseLiability100.0100.0

us-gaap:RightOfUseAssetObtainedInExchangeForOperatingLeaseLiability



Period End2020-03-312019-03-31
Value55274
Percentage of RightOfUseAssetObtainedInExchangeForOperatingLeaseLiability100.0100.0

us-gaap:StatementEquityComponents

us-gaap:StockRepurchasedAndRetiredDuringPeriodShares

us-gaap:CommonStock



Period End2020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-31
Value635265126
Percentage of StockRepurchasedAndRetiredDuringPeriodShares100.0100.0100.0100.0100.0100.0100.0

us-gaap:StockRepurchasedAndRetiredDuringPeriodValue



Period End2020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-312014-12-312014-09-302014-06-30
Value3442082681325325600325500350100
Percentage of StockRepurchasedAndRetiredDuringPeriodValue100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:StatementEquityComponents

us-gaap:AdditionalPaidInCapital



Period End2020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-31
Value10460844449918997
Percentage of StockRepurchasedAndRetiredDuringPeriodValue30.228.831.333.530.531.529.8

us-gaap:RetainedEarnings



Period End2020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-31
Value240148184881226411228
Percentage of StockRepurchasedAndRetiredDuringPeriodValue69.871.268.766.569.568.570.2

dal:AirlineRelatedInventoryAircraftPartsAndSuppliesNet



Period End2019-12-312018-12-31
Value521463
Percentage of AirlineRelatedInventoryAircraftPartsAndSuppliesNet100.0100.0

us-gaap:BalanceSheetLocation

dal:CarryingAmountOfHedgedInstrumentsFairValueHedgeNet

dal:CurrentMaturitiesOfDebtAndFinanceLeases



Period End2020-03-312019-12-31
Value-2219
Percentage of CarryingAmountOfHedgedInstrumentsFairValueHedgeNet100.0100.0

dal:DebtAndFinanceLeases



Period End2020-03-312019-12-31
Value471783
Percentage of CarryingAmountOfHedgedInstrumentsFairValueHedgeNet-213.69384.2

dal:DebtLongTermAndShortTermCombinedAmountFairValue



Period End2020-03-312019-12-31
Value1480010400
Percentage of DebtLongTermAndShortTermCombinedAmountFairValue100.0100.0

dal:DebtLongTermAndShortTermCombinedAmountGross



Period End2020-03-312019-12-31
Value156859991
Percentage of DebtLongTermAndShortTermCombinedAmountGross100.0100.0

dal:DebtLongTermDebtCurrentAndShortTermDebt



Period End2020-03-312019-12-31
Value40902054
Percentage of DebtLongTermDebtCurrentAndShortTermDebt100.0100.0

dal:DeferredTaxAssetsOperatingLeaseLiabilities



Period End2019-12-312018-12-312017-12-31
Value144615790
Percentage of DeferredTaxAssetsOperatingLeaseLiabilities100.0100.00.0

dal:DeferredTaxLiabilitiesOperatingLeaseRightOfUseAssets



Period End2019-12-312018-12-312017-12-31
Value129813880
Percentage of DeferredTaxLiabilitiesOperatingLeaseRightOfUseAssets100.0100.00.0

dal:EquitySecuritiesAndEquityMethodInvestments



Period End2020-03-312019-12-31
Value36842568
Percentage of EquitySecuritiesAndEquityMethodInvestments100.0100.0

dal:EquitySecuritiesInvestmentName

dal:EquitySecuritiesFVNIOwnershipPercentage

dal:GOL



Period End2019-12-312018-12-31
Value0.00.09
Percentage of EquitySecuritiesFVNIOwnershipPercentage0.0100.0

dal:HanjinKAL



Period End2020-03-312019-12-312018-12-31
Value0.150.10.0
Percentage of EquitySecuritiesFVNIOwnershipPercentage0.00.00.0

dal:WheelsUp



Period End2020-03-312019-12-31
Value0.270.0
Percentage of EquitySecuritiesFVNIOwnershipPercentage0.00.0

us-gaap:IndefiniteLivedIntangibleAssetsByMajorClass

dal:IndefiniteLivedIntangibleAssetPercentageOfFairValueInExcessOfCarryingAmount

us-gaap:TradeNames



Period End2019-12-31
Value1.85
Percentage of IndefiniteLivedIntangibleAssetPercentageOfFairValueInExcessOfCarryingAmount100.0

us-gaap:Range, us-gaap:IndefiniteLivedIntangibleAssetsByMajorClass

srt:Maximum, dal:AirlineAlliances



Period End2019-12-31
Value5.76
Percentage of IndefiniteLivedIntangibleAssetPercentageOfFairValueInExcessOfCarryingAmount311.4

srt:Maximum, dal:DomesticSlots



Period End2019-12-31
Value1.81
Percentage of IndefiniteLivedIntangibleAssetPercentageOfFairValueInExcessOfCarryingAmount97.8

srt:Maximum, dal:InternationalRoutesAndSlots



Period End2019-12-31
Value0.29
Percentage of IndefiniteLivedIntangibleAssetPercentageOfFairValueInExcessOfCarryingAmount15.7

srt:Minimum, dal:AirlineAlliances



Period End2019-12-31
Value0.67
Percentage of IndefiniteLivedIntangibleAssetPercentageOfFairValueInExcessOfCarryingAmount36.2

srt:Minimum, dal:DomesticSlots



Period End2019-12-31
Value0.61
Percentage of IndefiniteLivedIntangibleAssetPercentageOfFairValueInExcessOfCarryingAmount33.0

srt:Minimum, dal:InternationalRoutesAndSlots



Period End2019-12-31
Value0.15
Percentage of IndefiniteLivedIntangibleAssetPercentageOfFairValueInExcessOfCarryingAmount8.1

dal:IndefiniteLivedIntangibleAssetsAndGoodwill



Period End2020-03-312019-12-31
Value1567114841
Percentage of IndefiniteLivedIntangibleAssetsAndGoodwill100.0100.0

dal:LeaseLiability



Period End2019-12-312018-12-31
Value71497159
Percentage of LeaseLiability100.0100.0

dal:LeaseRightofUseAsset



Period End2019-12-312018-12-31
Value66896484
Percentage of LeaseRightofUseAsset100.0100.0

us-gaap:AircraftType, us-gaap:CounterpartyName

dal:NumberOfAircraftAcquiredPlanned

dal:A350900, dal:LATAMAirlinesGroupS.A.



Period End2020-03-31
Value4.0
Percentage of NumberOfAircraftAcquiredPlanned100.0

dal:A350900, dal:LATAMAirlinesGroupSA



Period End2019-12-31
Value4.0
Percentage of NumberOfAircraftAcquiredPlanned0.0

us-gaap:AircraftType, us-gaap:CounterpartyName, us-gaap:UnrecordedUnconditionalPurchaseObligationByCategoryOfItemPurchased

dal:A350900, dal:LATAMAirlinesGroupS.A., us-gaap:CapitalAdditions



Period End2020-03-31
Value4.0
Percentage of NumberOfAircraftAcquiredPlanned100.0

us-gaap:AircraftType, us-gaap:CounterpartyName

dal:NumberOfAircraftCommitmentsToBeAssumed

dal:A350900, dal:LATAMAirlinesGroupSA



Period End2019-12-31
Value10.0
Percentage of NumberOfAircraftCommitmentsToBeAssumed100.0

dal:PropertyPlantAndEquipmentAndFinanceLeaseRightOfUseAssetAccumulatedDepreciationAndAmortization



Period End2020-03-312019-12-312018-12-31
Value175061702715823
Percentage of PropertyPlantAndEquipmentAndFinanceLeaseRightOfUseAssetAccumulatedDepreciationAndAmortization100.0100.0100.0

us-gaap:PropertyPlantAndEquipmentByType

dal:FlightAndGroundEquipmentUnderFinanceLease



Period End2019-12-312018-12-31
Value546566
Percentage of PropertyPlantAndEquipmentAndFinanceLeaseRightOfUseAssetAccumulatedDepreciationAndAmortization3.23.6

dal:PropertyPlantAndEquipmentAndFinanceLeaseRightOfUseAssetAfterAccumulatedDepreciationAndAmortization



Period End2020-03-312019-12-312018-12-31
Value316443131028335
Percentage of PropertyPlantAndEquipmentAndFinanceLeaseRightOfUseAssetAfterAccumulatedDepreciationAndAmortization100.0100.0100.0

us-gaap:PropertyPlantAndEquipmentByType

dal:PropertyPlantAndEquipmentAndFinanceLeaseRightOfUseAssetBeforeAccumulatedDepreciationAndAmortization

dal:AdvancePaymentsForEquipment



Period End2019-12-312018-12-31
Value10191177
Percentage of PropertyPlantAndEquipmentAndFinanceLeaseRightOfUseAssetBeforeAccumulatedDepreciationAndAmortization100.0100.0

dal:FlightAndGroundEquipmentUnderFinanceLease



Period End2019-12-312018-12-31
Value16081055
Percentage of PropertyPlantAndEquipmentAndFinanceLeaseRightOfUseAssetBeforeAccumulatedDepreciationAndAmortization157.889.6

dal:GroundPropertyAndEquipment



Period End2019-12-312018-12-31
Value57214667
Percentage of PropertyPlantAndEquipmentAndFinanceLeaseRightOfUseAssetBeforeAccumulatedDepreciationAndAmortization561.4396.5

dal:InformationTechnologyRelatedAssets



Period End2019-12-312018-12-31
Value32763361
Percentage of PropertyPlantAndEquipmentAndFinanceLeaseRightOfUseAssetBeforeAccumulatedDepreciationAndAmortization321.5285.6

us-gaap:FlightEquipment



Period End2019-12-312018-12-31
Value3671333898
Percentage of PropertyPlantAndEquipmentAndFinanceLeaseRightOfUseAssetBeforeAccumulatedDepreciationAndAmortization3602.82880.0

dal:ShortTermDebtLongTermDebtCurrentMaturitiesAndFinanceLeaseLiabilityCurrent



Period End2020-03-312019-12-31
Value43372287
Percentage of ShortTermDebtLongTermDebtCurrentMaturitiesAndFinanceLeaseLiabilityCurrent100.0100.0

dei:EntityNumberOfEmployees



Period End2019-12-312018-12-312017-12-312016-12-312015-12-312011-12-31
Value91000.089000.087000.084000.083000.078400.0
Percentage of EntityNumberOfEmployees100.0100.0100.0100.0100.0100.0

dal:Employeegroups

dal:DeltaFlightSuperintendentsDispatchersRepresentedbyUnions



Period End2019-12-312018-12-312017-12-31
Value443.0432.0420.0
Percentage of EntityNumberOfEmployees0.50.50.5

dal:DeltaPilotsRepresentedbyUnions



Period End2019-12-312018-12-312017-12-31
Value13082.013203.013234.0
Percentage of EntityNumberOfEmployees14.414.815.2

dal:EndeavorFlightAttendantsRepresentedbyUnions



Period End2019-12-312018-12-312017-12-31
Value1492.01307.01160.0
Percentage of EntityNumberOfEmployees1.61.51.3

dal:EndeavorPilotsRepresentedbyUnions



Period End2019-12-312018-12-312017-12-31
Value1872.01976.01805.0
Percentage of EntityNumberOfEmployees2.12.22.1

dal:MonroeRefineryEmployeesRepresentedByUnitedSteelWorkers



Period End2019-12-31
Value199.0
Percentage of EntityNumberOfEmployees0.2

us-gaap:AdditionalPaidInCapitalCommonStock



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302009-12-31
Value110541112911177112011125411671117401180711967120531213312279124431229488879361103391087511285116811257812981134641368713876139821409614150141201406914045140311401513999139831396413945139261390013827
Percentage of AdditionalPaidInCapitalCommonStock100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:AirlineRelatedInventoryAircraftFuel



Period End2019-12-312018-12-31
Value730592
Percentage of AirlineRelatedInventoryAircraftFuel100.0100.0

us-gaap:AirlineRelatedInventoryNet



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312010-12-31
Value535521504493470463455440423413416401368372351340326318314328326318340357348357353376371404403393364367318
Percentage of AirlineRelatedInventoryNet100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:AirlineRelatedInventoryValuationReserves



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302010-12-31
Value9082949697102125122119113124119114110108103114114124120119127113124122-11812612513312712211210610196104104
Percentage of AirlineRelatedInventoryValuationReserves100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:AllowanceForDoubtfulAccountsReceivableCurrent



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302009-12-31
Value16131414141212131312121111151311119910921202423-232322223636374333393932403647
Percentage of AllowanceForDoubtfulAccountsReceivableCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:FairValueByFairValueHierarchyLevel

us-gaap:AlternativeInvestment

us-gaap:FairValueMeasuredAtNetAssetValuePerShare



Period End2019-12-312018-12-31
Value98549136
Percentage of AlternativeInvestment100.0100.0

us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:InvestmentType

us-gaap:FairValueMeasuredAtNetAssetValuePerShare, dal:OtherCommingledFunds



Period End2019-12-312018-12-31
Value716705
Percentage of AlternativeInvestment7.37.7

us-gaap:FairValueMeasuredAtNetAssetValuePerShare, dal:RealAssets



Period End2019-12-312018-12-31
Value758807
Percentage of AlternativeInvestment7.78.8

us-gaap:FairValueMeasuredAtNetAssetValuePerShare, us-gaap:DebtSecurities



Period End2019-12-312018-12-31
Value958769
Percentage of AlternativeInvestment9.78.4

us-gaap:FairValueMeasuredAtNetAssetValuePerShare, us-gaap:EquitySecurities



Period End2019-12-312018-12-31
Value18341591
Percentage of AlternativeInvestment18.617.4

us-gaap:FairValueMeasuredAtNetAssetValuePerShare, us-gaap:HedgeFunds



Period End2019-12-312018-12-31
Value55885264
Percentage of AlternativeInvestment56.757.6

us-gaap:StatementEquityComponents

us-gaap:AociTaxAttributableToParent

us-gaap:AccumulatedOtherComprehensiveIncome



Period End2020-03-312019-12-312018-12-312017-12-312016-12-31
Value-1531-1549-1492-1400-1458
Percentage of AociTaxAttributableToParent100.0100.0100.0100.0100.0

us-gaap:AssetsNoncurrent



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312017-12-31
Value58463562835627555384546455392645867
Percentage of AssetsNoncurrent100.0100.0100.0100.0100.0100.0100.0

us-gaap:CapitalizedComputerSoftwareNet



Period End2019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-312010-12-31
Value1100819659549420411383344200153
Percentage of CapitalizedComputerSoftwareNet100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FairValueByMeasurementFrequency

us-gaap:CashAndCashEquivalentsFairValueDisclosure

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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
Value46695861489164815081222982144587613571692279
Percentage of CashAndCashEquivalentsFairValueDisclosure100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:FairValueByMeasurementFrequency

us-gaap:FairValueMeasurementsRecurring



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302016-12-31
Value46695861489164815081222982144587613571692279
Percentage of CashAndCashEquivalentsFairValueDisclosure100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ProductOrService

us-gaap:ContractWithCustomerLiability

dal:ProductAndServiceOtherLoyaltyProgram



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312016-12-31
Value68176728669666546624664165426491639463215922
Percentage of ContractWithCustomerLiability100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ProductOrService

us-gaap:ContractWithCustomerLiabilityCurrent

dal:PassengerAirTraffic



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302017-12-31
Value559851165762661666004661553563604364
Percentage of ContractWithCustomerLiabilityCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0

dal:ProductAndServiceOtherLoyaltyProgram



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312017-12-31
Value1099321932003048301329892762
Percentage of ContractWithCustomerLiabilityCurrent19.662.955.546.145.764.163.3

us-gaap:ProductOrService

us-gaap:ContractWithCustomerLiabilityNoncurrent

dal:ProductAndServiceOtherLoyaltyProgram



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312017-12-31
Value5718350934963606361136523559
Percentage of ContractWithCustomerLiabilityNoncurrent100.0100.0100.0100.0100.0100.0100.0

us-gaap:DebtInstrumentCarryingAmount



Period End2019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-31
Value99918874917110307930888649491832685398473867888877112740276098243809884748963926194699804100831090211228118201215512267126331254612944133671379714543147391526515442
Percentage of DebtInstrumentCarryingAmount100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DebtInstrument, us-gaap:LongtermDebtType

dal:AircraftFinancings, us-gaap:SecuredDebt



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302017-12-31
Value124311931246150716461787128116471961
Percentage of DebtInstrumentCarryingAmount0.011.914.016.416.019.214.517.423.0

dal:BankRevolvingCreditFacilities, us-gaap:RevolvingCreditFacility



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302017-12-31
Value29200000000
Percentage of DebtInstrumentCarryingAmount0.00.00.00.00.00.00.00.00.0

dal:Certificates, us-gaap:SecuredDebt



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302017-12-31
Value261116691999203122761837201022072380
Percentage of DebtInstrumentCarryingAmount0.016.722.522.122.119.722.723.327.9

dal:NYTDCSpecialFacilitiesRevenueBondsSeries2018, us-gaap:Bonds



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302017-12-31
Value138313831383138313831383138313830
Percentage of DebtInstrumentCarryingAmount0.013.815.615.113.414.915.614.60.0

dal:OtherFinancings, dal:SecuredAndUnsecuredDebt



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302017-12-31
Value256196196200252251140204210
Percentage of DebtInstrumentCarryingAmount0.02.02.22.22.42.71.62.12.5

dal:RevolvingCreditFacility2018, us-gaap:RevolvingCreditFacility



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-31
Value265000000
Percentage of DebtInstrumentCarryingAmount0.00.00.00.00.00.0

dal:UnsecuredNotes, us-gaap:UnsecuredDebt



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302017-12-31
Value455055504050405040502450245024502450
Percentage of DebtInstrumentCarryingAmount0.055.545.644.239.326.327.625.828.7

us-gaap:DebtInstrument, us-gaap:LongtermDebtType

us-gaap:DebtInstrumentFaceAmount

dal:PassThroughCertificates20201ClassA, us-gaap:SecuredDebt



Period End2020-03-31
Value204
Percentage of DebtInstrumentFaceAmount100.0

dal:PassThroughCertificates20201ClassAA, us-gaap:SecuredDebt



Period End2020-03-31
Value796
Percentage of DebtInstrumentFaceAmount390.2

dal:PassThroughCertificatesSeries20201, us-gaap:SecuredDebt



Period End2020-03-31
Value1000
Percentage of DebtInstrumentFaceAmount490.2

dal:UnsecuredNotesOct2019, us-gaap:UnsecuredDebt



Period End2019-10-31
Value1500
Percentage of DebtInstrumentFaceAmount0.0

dal:UnsecuredNotesOct2019ThreePointSevenFiveDue2029, us-gaap:UnsecuredDebt



Period End2019-10-31
Value600
Percentage of DebtInstrumentFaceAmount0.0

dal:UnsecuredNotesOct2019TwoPointNineDue2024, us-gaap:UnsecuredDebt



Period End2019-10-31
Value900
Percentage of DebtInstrumentFaceAmount0.0

us-gaap:DebtInstrument, us-gaap:LongtermDebtType, us-gaap:SubsequentEventType

dal:CARESActUnsecuredLoan, us-gaap:UnsecuredDebt, us-gaap:SubsequentEvent



Period End2020-04-22
Value1600
Percentage of DebtInstrumentFaceAmount0.0

us-gaap:DebtInstrument, us-gaap:ShortTermDebtType

dal:SecuredTermLoanFacility2020, us-gaap:LoansPayable



Period End2020-03-31
Value2700
Percentage of DebtInstrumentFaceAmount1323.5

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dal:SecuredTermLoanFacility2020, us-gaap:LoansPayable, us-gaap:SubsequentEvent



Period End2020-04-22
Value3000
Percentage of DebtInstrumentFaceAmount0.0

us-gaap:DebtInstrumentUnamortizedDiscountPremiumAndDebtIssuanceCostsNet



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302017-12-31
Value-155-115-151-125-82-60-17-2399
Percentage of DebtInstrumentUnamortizedDiscountPremiumAndDebtIssuanceCostsNet100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DebtLongtermAndShorttermCombinedAmount



Period End2020-03-312019-12-312018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302011-12-31
Value158401010682348440837685708770700872927492811079468417888791839379970398561056310845113911168811777121061198013060
Percentage of DebtLongtermAndShorttermCombinedAmount100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DeferredIncomeTaxLiabilities



Period End2019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-31
Value76366762518076387500679171426866
Percentage of DeferredIncomeTaxLiabilities100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DeferredIncomeTaxLiabilitiesNet



Period End2020-03-312019-12-312019-09-302018-12-31
Value150214561245163
Percentage of DeferredIncomeTaxLiabilitiesNet100.0100.0100.0100.0

us-gaap:DeferredTaxAssetsDeferredIncome



Period End2019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-312010-12-31
Value1667162010241544152218241965213322972202
Percentage of DeferredTaxAssetsDeferredIncome100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DeferredTaxAssetsOperatingLossCarryforwards



Period End2019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-312010-12-31
Value56067414402485383847826024641466476472
Percentage of DeferredTaxAssetsOperatingLossCarryforwards100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DeferredTaxAssetsOther



Period End2019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-312010-12-31
Value3503577469631047659698439564495
Percentage of DeferredTaxAssetsOther100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DeferredTaxAssetsStateTaxes



Period End2019-12-312018-12-31
Value120242
Percentage of DeferredTaxAssetsStateTaxes100.0100.0

us-gaap:DeferredTaxAssetsTaxCreditCarryforwardsAlternativeMinimumTax



Period End2019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-312010-12-31
Value94189379379379357378402402424
Percentage of DeferredTaxAssetsTaxCreditCarryforwardsAlternativeMinimumTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefits



Period End2019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-312010-12-31
Value2241243525455259544460334982641557034527
Percentage of DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefits100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DeferredTaxLiabilitiesGoodwillAndIntangibleAssetsIntangibleAssets



Period End2019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-312010-12-31
Value1049105210701691168116841704173017551731
Percentage of DeferredTaxLiabilitiesGoodwillAndIntangibleAssetsIntangibleAssets100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DeferredTaxLiabilitiesOther



Period End2019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-312010-12-31
Value99137174246329444639926840
Percentage of DeferredTaxLiabilitiesOther100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DeferredTaxLiabilitiesPropertyPlantAndEquipment



Period End2019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-312010-12-31
Value5190418539365701549046634799485150934837
Percentage of DeferredTaxLiabilitiesPropertyPlantAndEquipment100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:RetirementPlanType

us-gaap:DefinedBenefitPlanAccumulatedOtherComprehensiveIncomeBeforeTax

us-gaap:OtherPostretirementBenefitPlansDefinedBenefit



Period End2019-12-312018-12-312017-12-312016-12-31
Value677566595488
Percentage of DefinedBenefitPlanAccumulatedOtherComprehensiveIncomeBeforeTax100.0100.0100.0100.0

us-gaap:PensionPlansDefinedBenefit



Period End2019-12-312018-12-312017-12-312016-12-31
Value8765868284958515
Percentage of DefinedBenefitPlanAccumulatedOtherComprehensiveIncomeBeforeTax1294.71533.91427.71744.9

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us-gaap:DefinedBenefitPlanAccumulatedOtherComprehensiveIncomeNetGainsLossesBeforeTax

us-gaap:OtherPostretirementBenefitPlansDefinedBenefit



Period End2019-12-312018-12-312017-12-312016-12-31
Value-715-613-651-570
Percentage of DefinedBenefitPlanAccumulatedOtherComprehensiveIncomeNetGainsLossesBeforeTax100.0100.0100.0100.0

us-gaap:PensionPlansDefinedBenefit



Period End2019-12-312018-12-312017-12-312016-12-31
Value-8765-8682-8495-8515
Percentage of DefinedBenefitPlanAccumulatedOtherComprehensiveIncomeNetGainsLossesBeforeTax1225.91416.31304.91493.9

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Period End2019-12-312018-12-312017-12-312016-12-31
Value-38-47-56-82
Percentage of DefinedBenefitPlanAccumulatedOtherComprehensiveIncomeNetPriorServiceCostCreditBeforeTax100.0100.0100.0100.0

us-gaap:DefinedBenefitPlanAssumptionsUsedCalculatingBenefitObligationDiscountRate



Period End2019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-312010-12-31
Value0.0340.04330.03690.0420.04570.04140.05010.04110.04940.0569
Percentage of DefinedBenefitPlanAssumptionsUsedCalculatingBenefitObligationDiscountRate100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

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us-gaap:DefinedBenefitPlanBenefitObligation

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Period End2019-12-312018-12-312017-12-312016-12-312015-12-31
Value33793225350433793336
Percentage of DefinedBenefitPlanBenefitObligation100.0100.0100.0100.0100.0

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Period End2019-12-312018-12-312017-12-312016-12-312015-12-31
Value2119919809216962085920611
Percentage of DefinedBenefitPlanBenefitObligation627.4614.2619.2617.3617.8

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Period End2019-12-312018-12-312017-12-31
Value152014181417
Percentage of DefinedBenefitPlanExpectedFutureBenefitPaymentsFiveFiscalYearsThereafter100.0100.0100.0

us-gaap:PensionPlansDefinedBenefit



Period End2019-12-312018-12-312017-12-31
Value624863806351
Percentage of DefinedBenefitPlanExpectedFutureBenefitPaymentsFiveFiscalYearsThereafter411.1449.9448.2

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us-gaap:DefinedBenefitPlanExpectedFutureBenefitPaymentsNextTwelveMonths

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Period End2019-12-312018-12-312017-12-31
Value324295284
Percentage of DefinedBenefitPlanExpectedFutureBenefitPaymentsNextTwelveMonths100.0100.0100.0

us-gaap:PensionPlansDefinedBenefit



Period End2019-12-312018-12-312017-12-31
Value117011871170
Percentage of DefinedBenefitPlanExpectedFutureBenefitPaymentsNextTwelveMonths361.1402.4412.0

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us-gaap:DefinedBenefitPlanExpectedFutureBenefitPaymentsYearFive

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Period End2019-12-312018-12-312017-12-31
Value317298296
Percentage of DefinedBenefitPlanExpectedFutureBenefitPaymentsYearFive100.0100.0100.0

us-gaap:PensionPlansDefinedBenefit



Period End2019-12-312018-12-312017-12-31
Value123912521238
Percentage of DefinedBenefitPlanExpectedFutureBenefitPaymentsYearFive390.9420.1418.2

us-gaap:RetirementPlanType

us-gaap:DefinedBenefitPlanExpectedFutureBenefitPaymentsYearFour

us-gaap:OtherPostretirementBenefitPlansDefinedBenefit



Period End2019-12-312018-12-312017-12-31
Value321301297
Percentage of DefinedBenefitPlanExpectedFutureBenefitPaymentsYearFour100.0100.0100.0

us-gaap:PensionPlansDefinedBenefit



Period End2019-12-312018-12-312017-12-31
Value122612381220
Percentage of DefinedBenefitPlanExpectedFutureBenefitPaymentsYearFour381.9411.3410.8

us-gaap:RetirementPlanType

us-gaap:DefinedBenefitPlanExpectedFutureBenefitPaymentsYearThree

us-gaap:OtherPostretirementBenefitPlansDefinedBenefit



Period End2019-12-312018-12-312017-12-31
Value324303296
Percentage of DefinedBenefitPlanExpectedFutureBenefitPaymentsYearThree100.0100.0100.0

us-gaap:PensionPlansDefinedBenefit



Period End2019-12-312018-12-312017-12-31
Value121112181201
Percentage of DefinedBenefitPlanExpectedFutureBenefitPaymentsYearThree373.8402.0405.7

us-gaap:RetirementPlanType

us-gaap:DefinedBenefitPlanExpectedFutureBenefitPaymentsYearTwo

us-gaap:OtherPostretirementBenefitPlansDefinedBenefit



Period End2019-12-312018-12-312017-12-31
Value327302291
Percentage of DefinedBenefitPlanExpectedFutureBenefitPaymentsYearTwo100.0100.0100.0

us-gaap:PensionPlansDefinedBenefit



Period End2019-12-312018-12-312017-12-31
Value118811971177
Percentage of DefinedBenefitPlanExpectedFutureBenefitPaymentsYearTwo363.3396.4404.5

us-gaap:RetirementPlanType

us-gaap:DefinedBenefitPlanFundedStatusOfPlan

us-gaap:OtherPostretirementBenefitPlansDefinedBenefit



Period End2019-12-312018-12-312017-12-312016-12-31
Value-2772-2588-2638-2595
Percentage of DefinedBenefitPlanFundedStatusOfPlan100.0100.0100.0100.0

us-gaap:PensionPlansDefinedBenefit



Period End2019-12-312018-12-312017-12-312016-12-31
Value-5354-6350-6952-10558
Percentage of DefinedBenefitPlanFundedStatusOfPlan193.1245.4263.5406.9

us-gaap:DefinedBenefitPlanHealthCareCostTrendRateAssumedNextFiscalYear



Period End2019-12-312018-12-312017-12-312016-12-312015-12-31
Value0.0650.06750.070.0650.07
Percentage of DefinedBenefitPlanHealthCareCostTrendRateAssumedNextFiscalYear100.0100.0100.0100.0100.0

us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FairValueByMeasurementFrequency, us-gaap:FinancialInstrument

us-gaap:DerivativeAssetsLiabilitiesAtFairValueNet

us-gaap:FairValueInputsLevel1, us-gaap:FairValueMeasurementsRecurring, us-gaap:EnergyRelatedDerivative



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302017-12-31
Value-5-115-18120-198-43
Percentage of DerivativeAssetsLiabilitiesAtFairValueNet100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:FairValueInputsLevel2, us-gaap:FairValueMeasurementsRecurring, us-gaap:EnergyRelatedDerivative



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302017-12-31
Value1327146-5-10-40-23
Percentage of DerivativeAssetsLiabilitiesAtFairValueNet-260.0-200.046.7-77.8600.0-25.052.6-500.053.5

us-gaap:FairValueInputsLevel2, us-gaap:FairValueMeasurementsRecurring, us-gaap:ForeignExchangeContract



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302017-12-31
Value1462138-3-95-17
Percentage of DerivativeAssetsLiabilitiesAtFairValueNet-280.0-600.0140.0-16.7800.0-15.047.462.539.5

us-gaap:FairValueInputsLevel2, us-gaap:FairValueMeasurementsRecurring, us-gaap:InterestRateSwap



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-30
Value25618262241-38-24
Percentage of DerivativeAssetsLiabilitiesAtFairValueNet-500.0-6100.0546.7-344.42400.05.0200.0-300.0

us-gaap:FairValueByMeasurementFrequency, us-gaap:FinancialInstrument

us-gaap:FairValueMeasurementsRecurring, us-gaap:EnergyRelatedDerivative



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302017-12-31
Value8122-4715-29-32-66
Percentage of DerivativeAssetsLiabilitiesAtFairValueNet-160.0-100.0146.722.2700.075.0152.6-400.0153.5

us-gaap:FairValueMeasurementsRecurring, us-gaap:ForeignExchangeContract



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302017-12-31
Value1462138-3-95-17
Percentage of DerivativeAssetsLiabilitiesAtFairValueNet-280.0-600.0140.0-16.7800.0-15.047.462.539.5

us-gaap:FairValueMeasurementsRecurring, us-gaap:InterestRateSwap



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-30
Value25618262241-38-24
Percentage of DerivativeAssetsLiabilitiesAtFairValueNet-500.0-6100.0546.7-344.42400.05.0200.0-300.0

us-gaap:BalanceSheetLocation

us-gaap:DerivativeFairValueOfDerivativeAsset

us-gaap:OtherAssets



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302011-12-31
Value25538759288151254941174640282438414983525158751298612810269881375
Percentage of DerivativeFairValueOfDerivativeAsset100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OtherCurrentAssets



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302011-12-31
Value11238636763445984100963921316322939349677321791987158696615751078524520437585610404496573556577
Percentage of DerivativeFairValueOfDerivativeAsset448.071.772.4113.6225.0550.0393.3700.01868.57100.05325.016300.022900.05614.31078.31932.57782.18279.2413.0648.31897.62073.11027.5896.6582.7453.5709.3315.6486.3830.4631.811540.0

us-gaap:OtherNoncurrentAssets



Period End2019-12-312018-12-31
Value538
Percentage of DerivativeFairValueOfDerivativeAsset100.0100.0

us-gaap:BalanceSheetLocation

us-gaap:DerivativeFairValueOfDerivativeAssetAmountNotOffsetAgainstCollateral

us-gaap:OtherAssets



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302012-12-31
Value255387592800911011678621296448494652741168412169
Percentage of DerivativeFairValueOfDerivativeAssetAmountNotOffsetAgainstCollateral100.0100.0100.0100.0100.00.00.0100.0100.0100.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OtherCurrentAssets



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302012-12-31
Value22243834213514222101715311042614319112914829215355401456457240320
Percentage of DerivativeFairValueOfDerivativeAssetAmountNotOffsetAgainstCollateral88.045.343.757.675.00.00.0244.42100.00.00.0700.01500.0516.7142.9525.0100.0681.0658.6201.6308.359.2467.4682.7541.9393.1544.0198.3463.8

us-gaap:OtherNoncurrentAssets



Period End2019-12-312018-12-31
Value530
Percentage of DerivativeFairValueOfDerivativeAssetAmountNotOffsetAgainstCollateral100.00.0

us-gaap:BalanceSheetLocation

us-gaap:DerivativeFairValueOfDerivativeLiability

us-gaap:OtherCurrentLiabilities



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302012-12-31
Value90192555462276106102070735237246068872489526302581219414402512277242617753146178192287
Percentage of DerivativeFairValueOfDerivativeLiability100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OtherLiabilities



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302011-12-31
Value0401061774417824306123145225267115183524791404233526458575249336884585
Percentage of DerivativeFairValueOfDerivativeLiability0.021.10.018.213.077.397.438.77.63.48.51.62.60.420.025.110.20.423.624.419.15.19.918.698.143.832.629.70.017.10.00.00.0

us-gaap:OtherNoncurrentLiabilities



Period End2019-12-312018-12-31
Value417
Percentage of DerivativeFairValueOfDerivativeLiability21.177.3

us-gaap:BalanceSheetLocation

us-gaap:DerivativeFairValueOfDerivativeLiabilityAmountNotOffsetAgainstCollateral

us-gaap:OtherCurrentLiabilities



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302012-12-31
Value050225133154316814021624632623816445773779960310741723117111719282834
Percentage of DerivativeFairValueOfDerivativeLiabilityAmountNotOffsetAgainstCollateral0.0100.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OtherLiabilities



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302012-12-31
Value040105959282616266122106193245816326745513737285149535049
Percentage of DerivativeFairValueOfDerivativeLiabilityAmountNotOffsetAgainstCollateral0.080.00.045.5100.069.2190.351.983.923.518.62.84.90.644.5117.753.61.120.444.342.48.031.6254.5300.0257.9189.3178.6144.1

us-gaap:OtherNoncurrentLiabilities



Period End2019-12-312018-12-31
Value49
Percentage of DerivativeFairValueOfDerivativeLiabilityAmountNotOffsetAgainstCollateral80.069.2

us-gaap:DerivativeFairValueOfDerivativeNet



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312010-12-31
Value4768125613913-76-51-35-83-165-214-242-291-327-307-690-581-742-677-1333-1782107368407504460283401306149-337133-110196
Percentage of DerivativeFairValueOfDerivativeNet100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

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

us-gaap:DerivativeNotionalAmount

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



Period End2020-03-312019-12-312019-09-302019-06-302018-12-31
Value1501872187218831893
Percentage of DerivativeNotionalAmount100.0100.0100.0100.0100.0

us-gaap:DerivativeInstrumentRisk, us-gaap:HedgingDesignation

dal:ForeignExchangeContractEuroBased, us-gaap:Nondesignated



Period End2020-03-312019-12-312018-12-312018-09-012018-01-31
Value238397397397375
Percentage of DerivativeNotionalAmount158.721.221.00.00.0

dal:ForeignExchangeContractWonBased, us-gaap:Nondesignated



Period End2020-03-312019-12-312019-11-30
Value177045177045177000
Percentage of DerivativeNotionalAmount118030.09457.50.0

us-gaap:EmployeeRelatedLiabilitiesCurrent



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302009-12-31
Value184437013119261720373287285224361915302226832259183529242628223719033195279021121622226622991802145519261769141412231680149112291071136712031086996137012801037
Percentage of EmployeeRelatedLiabilitiesCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName

us-gaap:EquityMethodInvestmentOwnershipPercentage

dal:GrupoAeromexico



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-03-312016-12-312016-09-302016-06-302016-03-31
Value0.510.510.510.510.510.510.490.490.490.490.490.360.0420.0420.0410.041
Percentage of EquityMethodInvestmentOwnershipPercentage100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

dal:LATAMAirlinesGroupS.A.



Period End2020-03-312019-12-31
Value0.20.0
Percentage of EquityMethodInvestmentOwnershipPercentage39.20.0

us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName, us-gaap:SubsequentEventType

dal:LATAMAirlinesGroupSA, us-gaap:SubsequentEvent



Period End2020-01-31
Value0.2
Percentage of EquityMethodInvestmentOwnershipPercentage0.0

dal:WheelsUp, us-gaap:SubsequentEvent



Period End2020-01-31
Value0.27
Percentage of EquityMethodInvestmentOwnershipPercentage0.0

us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName

us-gaap:EquityMethodInvestments

dal:AirCoAviationServicesLLC



Period End2020-03-312019-12-312018-12-31
Value141142109
Percentage of EquityMethodInvestments100.0100.0100.0

dal:GrupoAeromexico



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-31
Value770833843841864897
Percentage of EquityMethodInvestments546.1586.60.00.00.0822.9

dal:LATAMAirlinesGroupS.A.



Period End2020-03-312020-01-312019-12-31
Value108811000
Percentage of EquityMethodInvestments771.60.00.0

dal:VirginAtlantic



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-31
Value207375393365356383
Percentage of EquityMethodInvestments146.8264.10.00.00.0351.4

us-gaap:EquitySecuritiesFvNi



Period End2020-03-312019-12-312018-12-31
Value136710991090
Percentage of EquitySecuritiesFvNi100.0100.0100.0

dal:EquitySecuritiesInvestmentName

dal:AirFranceKLM



Period End2020-03-312019-12-312018-12-31
Value211418408
Percentage of EquitySecuritiesFvNi15.438.037.4

dal:ChinaEastern



Period End2020-03-312019-12-312018-12-31
Value159258259
Percentage of EquitySecuritiesFvNi11.623.523.8

dal:GOL



Period End2019-12-312018-12-31
Value0213
Percentage of EquitySecuritiesFvNi0.019.5

dal:HanjinKAL



Period End2020-03-312019-12-312018-12-31
Value5382050
Percentage of EquitySecuritiesFvNi39.418.70.0

dal:OtherEquitySecurityFVInvestments



Period End2020-03-312019-12-312018-12-31
Value225218210
Percentage of EquitySecuritiesFvNi16.519.819.3

dal:WheelsUp



Period End2020-03-312019-12-31
Value2340
Percentage of EquitySecuritiesFvNi17.10.0

us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FairValueByMeasurementFrequency

us-gaap:FairValueInputsLevel1, us-gaap:FairValueMeasurementsRecurring



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312017-12-31
Value9088811009980970880485
Percentage of EquitySecuritiesFvNi66.480.20.00.00.080.70.0

us-gaap:FairValueInputsLevel2, us-gaap:FairValueMeasurementsRecurring



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312017-12-31
Value45921820520520420428
Percentage of EquitySecuritiesFvNi33.619.80.00.00.018.70.0

us-gaap:FairValueByMeasurementFrequency

us-gaap:FairValueMeasurementsRecurring



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312017-12-31
Value136710991214118511741084513
Percentage of EquitySecuritiesFvNi100.0100.00.00.00.099.40.0

us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:InvestmentType

us-gaap:FairValueInvestmentsEntitiesThatCalculateNetAssetValuePerShareUnfundedCommittments

us-gaap:FairValueMeasuredAtNetAssetValuePerShare, dal:RealAssets



Period End2019-12-31
Value203
Percentage of FairValueInvestmentsEntitiesThatCalculateNetAssetValuePerShareUnfundedCommittments100.0

us-gaap:FairValueMeasuredAtNetAssetValuePerShare, us-gaap:DebtSecurities



Period End2019-12-31
Value254
Percentage of FairValueInvestmentsEntitiesThatCalculateNetAssetValuePerShareUnfundedCommittments125.1

us-gaap:FairValueMeasuredAtNetAssetValuePerShare, us-gaap:EquitySecurities



Period End2019-12-31
Value393
Percentage of FairValueInvestmentsEntitiesThatCalculateNetAssetValuePerShareUnfundedCommittments193.6

us-gaap:FairValueMeasuredAtNetAssetValuePerShare, us-gaap:HedgeFunds



Period End2019-12-31
Value76
Percentage of FairValueInvestmentsEntitiesThatCalculateNetAssetValuePerShareUnfundedCommittments37.4

us-gaap:FinanceLeaseLiabilityCurrent



Period End2019-12-312018-12-31
Value233109
Percentage of FinanceLeaseLiabilityCurrent100.0100.0

us-gaap:FinanceLeaseLiabilityNoncurrent



Period End2019-12-312018-12-31
Value821294
Percentage of FinanceLeaseLiabilityNoncurrent100.0100.0

us-gaap:FinanceLeaseRightOfUseAsset



Period End2019-12-312018-12-31
Value1062490
Percentage of FinanceLeaseRightOfUseAsset100.0100.0

us-gaap:FinanceLeaseWeightedAverageDiscountRatePercent



Period End2019-12-312018-12-31
Value0.03460.0523
Percentage of FinanceLeaseWeightedAverageDiscountRatePercent100.0100.0

us-gaap:FiniteLivedIntangibleAssetsAccumulatedAmortization



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302009-12-31
Value875873871868865862857853849845841837833828824820815811806802797793782771753-738719702685670651634617600582565547530512451
Percentage of FiniteLivedIntangibleAssetsAccumulatedAmortization100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:FiniteLivedIntangibleAssetsByMajorClass

us-gaap:ContractBasedIntangibleAssets



Period End2019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-31
Value12812211510810092-83-72
Percentage of FiniteLivedIntangibleAssetsAccumulatedAmortization14.714.213.613.012.311.611.2-10.7

us-gaap:MarketingRelatedIntangibleAssets



Period End2019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-31
Value692687677667658648-602-545
Percentage of FiniteLivedIntangibleAssetsAccumulatedAmortization79.379.780.180.681.181.781.6-81.3

us-gaap:OtherIntangibleAssets



Period End2019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-312010-12-31
Value535353535353-53535353
Percentage of FiniteLivedIntangibleAssetsAccumulatedAmortization6.16.16.36.46.56.77.27.98.810.0

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

us-gaap:ForeignCurrencyCashFlowHedgeAssetAtFairValue

us-gaap:OtherAssets, dal:ForeignExchangeContractWonBased, us-gaap:Nondesignated



Period End2020-03-312019-12-31
Value20
Percentage of ForeignCurrencyCashFlowHedgeAssetAtFairValue100.00.0

us-gaap:OtherCurrentAssets, dal:ForeignExchangeContractEuroBased, us-gaap:Nondesignated



Period End2020-03-312019-12-312018-12-31
Value11913
Percentage of ForeignCurrencyCashFlowHedgeAssetAtFairValue550.00.00.0

us-gaap:OtherNoncurrentAssets, dal:ForeignExchangeContractWonBased, us-gaap:Nondesignated



Period End2019-12-31
Value0.0
Percentage of ForeignCurrencyCashFlowHedgeAssetAtFairValue0.0

us-gaap:DerivativeInstrumentRisk, us-gaap:HedgingDesignation

us-gaap:ForeignCurrencyCashFlowHedgeDerivativeAtFairValueNet

dal:ForeignExchangeContractEuroBased, us-gaap:Nondesignated



Period End2020-03-312019-12-312018-12-31
Value119-4
Percentage of ForeignCurrencyCashFlowHedgeDerivativeAtFairValueNet100.0100.0100.0

dal:ForeignExchangeContractWonBased, us-gaap:Nondesignated



Period End2020-03-312019-12-31
Value3-3
Percentage of ForeignCurrencyCashFlowHedgeDerivativeAtFairValueNet27.3-33.3

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

us-gaap:ForeignCurrencyCashFlowHedgeLiabilityAtFairValue

us-gaap:OtherLiabilities, dal:ForeignExchangeContractWonBased, us-gaap:Nondesignated



Period End2020-03-312019-12-31
Value04
Percentage of ForeignCurrencyCashFlowHedgeLiabilityAtFairValue0.0100.0

us-gaap:OtherNoncurrentLiabilities, dal:ForeignExchangeContractEuroBased, us-gaap:Nondesignated



Period End2019-12-312018-12-31
Value017
Percentage of ForeignCurrencyCashFlowHedgeLiabilityAtFairValue0.00.0

us-gaap:OtherNoncurrentLiabilities, dal:ForeignExchangeContractWonBased, us-gaap:Nondesignated



Period End2019-12-31
Value4
Percentage of ForeignCurrencyCashFlowHedgeLiabilityAtFairValue100.0

us-gaap:BalanceSheetLocation

us-gaap:HedgedLiabilityFairValueHedge

dal:CurrentMaturitiesOfLongTermDebtAndFinanceLeases



Period End2019-12-312019-09-302019-06-302019-03-312018-12-31
Value1920211611
Percentage of HedgedLiabilityFairValueHedge100.0100.0100.0100.0100.0

dal:LongTermDebtAndFinanceLeases



Period End2019-12-312019-09-302019-06-302019-03-312018-12-31
Value17831759191218781870
Percentage of HedgedLiabilityFairValueHedge9384.28795.09104.811737.517000.0

us-gaap:BalanceSheetLocation

us-gaap:HedgedLiabilityFairValueHedgeCumulativeIncreaseDecrease

dal:CurrentMaturitiesOfDebtAndFinanceLeases



Period End2020-03-312019-12-31
Value-22-8
Percentage of HedgedLiabilityFairValueHedgeCumulativeIncreaseDecrease100.0100.0

dal:CurrentMaturitiesOfLongTermDebtAndFinanceLeases



Period End2019-12-312019-09-302019-06-302019-03-312018-12-31
Value8-74-1-7
Percentage of HedgedLiabilityFairValueHedgeCumulativeIncreaseDecrease-100.00.00.00.00.0

dal:DebtAndFinanceLeases



Period End2020-03-312019-12-31
Value-102-53
Percentage of HedgedLiabilityFairValueHedgeCumulativeIncreaseDecrease463.6662.5

dal:LongTermDebtAndFinanceLeases



Period End2019-12-312019-09-302019-06-302019-03-312018-12-31
Value53-7559258
Percentage of HedgedLiabilityFairValueHedgeCumulativeIncreaseDecrease-662.50.00.00.00.0

us-gaap:IndefiniteLivedIntangibleAssetsExcludingGoodwill



Period End2019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-312010-12-31
Value5060471647164696469644204420437343754303
Percentage of IndefiniteLivedIntangibleAssetsExcludingGoodwill100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:IndefiniteLivedIntangibleAssetsByMajorClass

dal:AirlineAlliances



Period End2020-03-312019-12-312018-12-31
Value18631005661
Percentage of IndefiniteLivedIntangibleAssetsExcludingGoodwill0.019.914.0

dal:DomesticSlots



Period End2020-03-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-312010-12-31
Value622622622622622622622622622624502
Percentage of IndefiniteLivedIntangibleAssetsExcludingGoodwill0.012.313.213.213.213.214.114.114.214.311.7

dal:InternationalRoutesAndSlots



Period End2020-03-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-312010-12-31
Value25832583258325832563256322872287224022402290
Percentage of IndefiniteLivedIntangibleAssetsExcludingGoodwill0.051.054.854.854.654.651.751.751.251.253.2

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

us-gaap:InterestRateFairValueHedgeAssetAtFairValue

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



Period End2020-03-312019-12-312019-09-302018-12-31
Value2353758
Percentage of InterestRateFairValueHedgeAssetAtFairValue100.0100.0100.0100.0

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



Period End2020-03-312019-12-312019-09-302018-12-31
Value21270
Percentage of InterestRateFairValueHedgeAssetAtFairValue8.722.69.30.0

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



Period End2019-12-312018-12-31
Value538
Percentage of InterestRateFairValueHedgeAssetAtFairValue100.0100.0

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

us-gaap:InterestRateFairValueHedgeDerivativeAtFairValueNet

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



Period End2020-03-312019-12-312019-09-302018-12-31
Value2561821
Percentage of InterestRateFairValueHedgeDerivativeAtFairValueNet100.0100.0100.0100.0

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

us-gaap:InterestRateFairValueHedgeLiabilityAtFairValue

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



Period End2020-03-312019-12-312019-09-302018-12-31
Value0407
Percentage of InterestRateFairValueHedgeLiabilityAtFairValue0.0100.00.0100.0

us-gaap:LineOfCreditFacilityCurrentBorrowingCapacity



Period End2019-12-312019-09-302019-06-302019-03-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-31
Value310931063100303930302450246322071903192518251825
Percentage of LineOfCreditFacilityCurrentBorrowingCapacity100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DebtInstrument

dal:BankRevolvingCreditFacilities



Period End2019-12-312019-09-302019-06-302019-03-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-31
Value459456450389380535513257228250150100
Percentage of LineOfCreditFacilityCurrentBorrowingCapacity14.814.714.512.812.521.820.811.612.013.08.25.5

us-gaap:LongTermDebtAndCapitalLeaseObligations



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302009-12-31
Value1266288737923771077108253811585626360659275847916818762016473668969206766709675988305856189709089946697951007710526107211108211111112211152111847125571302613446131791306315665
Percentage of LongTermDebtAndCapitalLeaseObligations100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:LongTermDebtAndCapitalLeaseObligationsCurrent



Period End2019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302009-12-31
Value228721962281305515181176134222892242122410981040113110921115153115631705165912611216116912331578154718231695159316271546177918551944193716351723207323021533
Percentage of LongTermDebtAndCapitalLeaseObligationsCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:LongTermDebtFairValue



Period End2019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302017-12-31
Value1040093009600106009400900097008700
Percentage of LongTermDebtFairValue100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:Range, us-gaap:DebtInstrument, us-gaap:LongtermDebtType

us-gaap:LongtermDebtWeightedAverageInterestRate

srt:Maximum, dal:AircraftFinancings, us-gaap:SecuredDebt



Period End2019-12-31
Value0.0608
Percentage of LongtermDebtWeightedAverageInterestRate100.0

srt:Maximum, dal:Certificates, us-gaap:SecuredDebt



Period End2019-12-31
Value0.0802
Percentage of LongtermDebtWeightedAverageInterestRate131.9

srt:Maximum, dal:NYTDCSpecialFacilitiesRevenueBondsSeries2018, us-gaap:Bonds



Period End2019-12-31
Value0.05
Percentage of LongtermDebtWeightedAverageInterestRate82.2

srt:Maximum, dal:OtherFinancings, dal:SecuredAndUnsecuredDebt



Period End2019-12-31
Value0.0875
Percentage of LongtermDebtWeightedAverageInterestRate143.9

srt:Maximum, dal:UnsecuredNotes, us-gaap:UnsecuredDebt



Period End2019-12-31
Value0.0438
Percentage of LongtermDebtWeightedAverageInterestRate72.0

srt:Minimum, dal:AircraftFinancings, us-gaap:SecuredDebt



Period End2019-12-31
Value0.0199
Percentage of LongtermDebtWeightedAverageInterestRate32.7

srt:Minimum, dal:Certificates, us-gaap:SecuredDebt



Period End2019-12-31
Value0.032
Percentage of LongtermDebtWeightedAverageInterestRate52.6

srt:Minimum, dal:NYTDCSpecialFacilitiesRevenueBondsSeries2018, us-gaap:Bonds



Period End2019-12-31
Value0.04
Percentage of LongtermDebtWeightedAverageInterestRate65.8

srt:Minimum, dal:OtherFinancings, dal:SecuredAndUnsecuredDebt



Period End2019-12-31
Value0.0251
Percentage of LongtermDebtWeightedAverageInterestRate41.3

srt:Minimum, dal:UnsecuredNotes, us-gaap:UnsecuredDebt



Period End2019-12-31
Value0.026
Percentage of LongtermDebtWeightedAverageInterestRate42.8

us-gaap:OperatingLeaseLiabilityCurrent



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312017-12-31
Value7688018448419419550
Percentage of OperatingLeaseLiabilityCurrent100.0100.0100.0100.0100.0100.00.0

us-gaap:OperatingLeaseLiabilityNoncurrent



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312017-12-31
Value5204529454415539580558010
Percentage of OperatingLeaseLiabilityNoncurrent100.0100.0100.0100.0100.0100.00.0

us-gaap:OperatingLeaseWeightedAverageDiscountRatePercent



Period End2019-12-312018-12-31
Value0.03730.0369
Percentage of OperatingLeaseWeightedAverageDiscountRatePercent100.0100.0

us-gaap:RetirementPlanType

us-gaap:PensionAndOtherPostretirementDefinedBenefitPlansCurrentLiabilities

us-gaap:OtherPostretirementBenefitPlansDefinedBenefit



Period End2019-12-312018-12-312017-12-312016-12-31
Value125123121125
Percentage of PensionAndOtherPostretirementDefinedBenefitPlansCurrentLiabilities100.0100.0100.0100.0

us-gaap:PensionPlansDefinedBenefit



Period End2019-12-312018-12-312017-12-312016-12-31
Value19273230
Percentage of PensionAndOtherPostretirementDefinedBenefitPlansCurrentLiabilities15.222.026.424.0

us-gaap:RetirementPlanType

us-gaap:PensionAndOtherPostretirementDefinedBenefitPlansLiabilitiesCurrentAndNoncurrent

us-gaap:OtherPostretirementBenefitPlansDefinedBenefit



Period End2019-12-312018-12-312017-12-312016-12-31
Value2772258826382595
Percentage of PensionAndOtherPostretirementDefinedBenefitPlansLiabilitiesCurrentAndNoncurrent100.0100.0100.0100.0

us-gaap:PensionPlansDefinedBenefit



Period End2019-12-312018-12-312017-12-312016-12-31
Value53546350695210558
Percentage of PensionAndOtherPostretirementDefinedBenefitPlansLiabilitiesCurrentAndNoncurrent193.1245.4263.5406.9

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

us-gaap:PriceRiskDerivativeAssetsAtFairValue

us-gaap:OtherAssets, us-gaap:EnergyRelatedDerivative, us-gaap:Nondesignated



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302017-12-31
Value00000015128
Percentage of PriceRiskDerivativeAssetsAtFairValue0.00.00.00.00.00.0100.0100.0100.0

us-gaap:OtherCurrentAssets, us-gaap:EnergyRelatedDerivative, us-gaap:Nondesignated



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302017-12-31
Value9816474651304570638
Percentage of PriceRiskDerivativeAssetsAtFairValue0.00.00.00.00.00.0300.0583.37975.0

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

us-gaap:PriceRiskDerivativeLiabilitiesAtFairValue

us-gaap:OtherCurrentLiabilities, us-gaap:EnergyRelatedDerivative, us-gaap:Nondesignated



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302017-12-31
Value9015255044157398694
Percentage of PriceRiskDerivativeLiabilitiesAtFairValue100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OtherLiabilities, us-gaap:EnergyRelatedDerivative, us-gaap:Nondesignated



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302017-12-31
Value000000161618
Percentage of PriceRiskDerivativeLiabilitiesAtFairValue0.00.00.00.00.00.021.916.32.6

us-gaap:DerivativeInstrumentRisk, us-gaap:HedgingDesignation

us-gaap:PriceRiskDerivativesAtFairValueNet

us-gaap:EnergyRelatedDerivative, us-gaap:Nondesignated



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302017-12-31
Value8122-4715-29-32-66
Percentage of PriceRiskDerivativesAtFairValueNet100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:RestrictedCashAndCashEquivalentsAtCarryingValue



Period End2019-12-312018-12-312018-03-312017-12-312017-03-31
Value21247353961
Percentage of RestrictedCashAndCashEquivalentsAtCarryingValue100.0100.0100.0100.0100.0

us-gaap:RestrictedCashAndCashEquivalentsNoncurrent



Period 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
Value45563675389310181136121413260000
Percentage of RestrictedCashAndCashEquivalentsNoncurrent100.0100.0100.0100.0100.0100.0100.0100.00.00.00.00.0

us-gaap:RestrictedCashCurrent



Period End2020-03-312019-03-31
Value3957
Percentage of RestrictedCashCurrent100.0100.0

us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FairValueByMeasurementFrequency

us-gaap:RestrictedInvestmentsAtFairValue

us-gaap:FairValueInputsLevel1, us-gaap:FairValueMeasurementsRecurring



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312017-12-31
Value49484779810201075118338
Percentage of RestrictedInvestmentsAtFairValue100.0100.0100.0100.0100.0100.0100.0

us-gaap:FairValueByMeasurementFrequency

us-gaap:FairValueMeasurementsRecurring



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312017-12-31
Value49484779810201075118338
Percentage of RestrictedInvestmentsAtFairValue100.0100.0100.0100.0100.0100.0100.0

us-gaap:DebtInstrument, us-gaap:ShortTermDebtType

us-gaap:ShortTermBorrowings

dal:SecuredTermLoanFacility2020, us-gaap:LoansPayable



Period End2020-03-312019-12-31
Value27000
Percentage of ShortTermBorrowings100.00.0

us-gaap:ShortTermNonBankLoansAndNotesPayable



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312016-12-31
Value11007364391067106610751066106210621067431
Percentage of ShortTermNonBankLoansAndNotesPayable100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:TreasuryStockShares



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302009-12-31
Value9888888887777141414142121212019191919181717171616161616141414121210
Percentage of TreasuryStockShares100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:UnrecordedUnconditionalPurchaseObligationByCategoryOfItemPurchased

us-gaap:UnrecordedUnconditionalPurchaseObligationBalanceOnFifthAnniversary

us-gaap:AirlineCapacityPurchaseArrangements



Period End2019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-31
Value10027697237371650143013201690
Percentage of UnrecordedUnconditionalPurchaseObligationBalanceOnFifthAnniversary100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:CapitalAdditions



Period End2019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-31
Value50018502450113019001060450760760
Percentage of UnrecordedUnconditionalPurchaseObligationBalanceOnFifthAnniversary49.9240.6338.9153.3115.274.134.145.00.0

us-gaap:UnrecordedUnconditionalPurchaseObligationByCategoryOfItemPurchased

us-gaap:UnrecordedUnconditionalPurchaseObligationBalanceOnFirstAnniversary

us-gaap:AirlineCapacityPurchaseArrangements



Period End2019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-31
Value17501505177220392160222021102210
Percentage of UnrecordedUnconditionalPurchaseObligationBalanceOnFirstAnniversary100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:CapitalAdditions



Period End2019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-31
Value29803290357025802140148015851000215
Percentage of UnrecordedUnconditionalPurchaseObligationBalanceOnFirstAnniversary170.3218.6201.5126.599.166.775.145.20.0

us-gaap:UnrecordedUnconditionalPurchaseObligationByCategoryOfItemPurchased

us-gaap:UnrecordedUnconditionalPurchaseObligationBalanceOnFourthAnniversary

us-gaap:AirlineCapacityPurchaseArrangements



Period End2019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-31
Value113287279312201960155015601850
Percentage of UnrecordedUnconditionalPurchaseObligationBalanceOnFourthAnniversary100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:CapitalAdditions



Period End2019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-31
Value1640276038801730150022301495810760
Percentage of UnrecordedUnconditionalPurchaseObligationBalanceOnFourthAnniversary144.9316.5489.3141.876.5143.995.843.80.0

us-gaap:UnrecordedUnconditionalPurchaseObligationByCategoryOfItemPurchased

us-gaap:UnrecordedUnconditionalPurchaseObligationBalanceOnSecondAnniversary

us-gaap:AirlineCapacityPurchaseArrangements



Period End2019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-31
Value14321344160318272270193020402200
Percentage of UnrecordedUnconditionalPurchaseObligationBalanceOnSecondAnniversary100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:CapitalAdditions



Period End2019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-31
Value37403130337029802500197012151525530
Percentage of UnrecordedUnconditionalPurchaseObligationBalanceOnSecondAnniversary261.2232.9210.2163.1110.1102.159.669.30.0

us-gaap:UnrecordedUnconditionalPurchaseObligationByCategoryOfItemPurchased

us-gaap:UnrecordedUnconditionalPurchaseObligationBalanceOnThirdAnniversary

us-gaap:AirlineCapacityPurchaseArrangements



Period End2019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-31
Value1377951132015622110172017802130
Percentage of UnrecordedUnconditionalPurchaseObligationBalanceOnThirdAnniversary100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:CapitalAdditions



Period End2019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-31
Value3390319032703380251023901700815745
Percentage of UnrecordedUnconditionalPurchaseObligationBalanceOnThirdAnniversary246.2335.4247.7216.4119.0139.095.538.30.0

us-gaap:UnrecordedUnconditionalPurchaseObligationByCategoryOfItemPurchased

us-gaap:UnrecordedUnconditionalPurchaseObligationBalanceSheetAmount

us-gaap:AirlineCapacityPurchaseArrangements



Period End2019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-31
Value904283038186858112320112201074013960
Percentage of UnrecordedUnconditionalPurchaseObligationBalanceSheetAmount100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:CapitalAdditions



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302015-12-312014-12-312013-12-312012-12-312011-12-31
Value1470013700139001410015100162001550016400172001830013100137001240012500154001356013950914581506820
Percentage of UnrecordedUnconditionalPurchaseObligationBalanceSheetAmount0.0151.50.00.00.0195.10.00.00.0223.60.00.00.0145.70.0110.1124.385.158.40.0

us-gaap:UnrecordedUnconditionalPurchaseObligationByCategoryOfItemPurchased

us-gaap:UnrecordedUnconditionalPurchaseObligationDueAfterFiveYears

us-gaap:AirlineCapacityPurchaseArrangements



Period End2019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-31
Value23492862197511962170237019303880
Percentage of UnrecordedUnconditionalPurchaseObligationDueAfterFiveYears100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:CapitalAdditions



Period End2019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-31
Value14401940174066030104820270032403810
Percentage of UnrecordedUnconditionalPurchaseObligationDueAfterFiveYears61.367.888.155.2138.7203.4139.983.50.0

us-gaap:AircraftType, us-gaap:UnrecordedUnconditionalPurchaseObligationByCategoryOfItemPurchased

us-gaap:UnrecordedUnconditionalPurchaseObligationMinimumQuantityRequired

dal:A220100, us-gaap:CapitalAdditions



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-12-012018-09-302018-06-30
Value14.017.020.027.031.036.040.075.075.0
Percentage of UnrecordedUnconditionalPurchaseObligationMinimumQuantityRequired100.0100.0100.0100.0100.0100.0100.0100.0100.0

dal:A321200, us-gaap:CapitalAdditions



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-09-30
Value27.031.033.044.053.062.064.071.085.093.096.0100.064.067.071.077.044.045.0
Percentage of UnrecordedUnconditionalPurchaseObligationMinimumQuantityRequired192.9182.4165.0163.0171.0172.285.394.70.00.00.00.00.00.00.00.00.00.0

dal:A330900neo, us-gaap:CapitalAdditions



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-11-302018-10-312018-09-302018-06-30
Value32.033.031.033.035.035.035.025.025.025.0
Percentage of UnrecordedUnconditionalPurchaseObligationMinimumQuantityRequired228.6194.1155.0122.2112.997.20.00.033.333.3

dal:A350900, us-gaap:CapitalAdditions



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-09-30
Value26.016.016.012.012.014.014.014.017.019.023.025.025.025.025.025.025.025.0
Percentage of UnrecordedUnconditionalPurchaseObligationMinimumQuantityRequired185.794.180.044.438.738.918.718.70.00.00.00.00.00.00.00.00.00.0

srt:CRJ900, us-gaap:CapitalAdditions



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-30
Value4.06.08.09.012.015.019.020.0
Percentage of UnrecordedUnconditionalPurchaseObligationMinimumQuantityRequired28.635.340.033.338.741.725.326.7

us-gaap:UnrecordedUnconditionalPurchaseObligationByCategoryOfItemPurchased

us-gaap:CapitalAdditions



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-31
Value253.0253.0258.0275.0302.0330.0323.0335.0338.0353.0265.0276.0245.0245.0279.0298.0200.0
Percentage of UnrecordedUnconditionalPurchaseObligationMinimumQuantityRequired1807.11488.21290.01018.5974.2916.7430.7446.70.00.00.00.00.00.00.00.00.0

Line plots across dimensions of each concept

us-gaap:SharesIssued us-gaap:StatementEquityComponents


us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:ProductOrService


us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:ProductOrService, us-gaap:AirlineDestinations


us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:ConsolidationItems, us-gaap:ProductOrService


us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:ConsolidationItems, us-gaap:StatementBusinessSegments


us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:AirlineDestinations


us-gaap:OperatingIncomeLoss us-gaap:ConsolidationItems, us-gaap:StatementBusinessSegments


us-gaap:Assets us-gaap:ConsolidationItems, us-gaap:StatementBusinessSegments


us-gaap:StockholdersEquity us-gaap:StatementEquityComponents


us-gaap:PensionAndOtherPostretirementDefinedBenefitPlansLiabilitiesNoncurrent us-gaap:RetirementPlanType


us-gaap:StockholdersEquity us-gaap:StatementEquityComponents


us-gaap:DepreciationDepletionAndAmortization us-gaap:ConsolidationItems, us-gaap:StatementBusinessSegments