DAL


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

Table of contents


us-gaap:StatementEquityComponents
us-gaap:SharesIssued

us-gaap:WeightedAverageNumberOfDilutedSharesOutstanding

us-gaap:WeightedAverageNumberOfSharesOutstandingBasic

us-gaap:EarningsPerShareBasic

us-gaap:EarningsPerShareDiluted

us-gaap:ComprehensiveIncomeNetOfTax

us-gaap:CostsAndExpenses

us-gaap:GainLossOnInvestments
us-gaap:DebtInstrument, us-gaap:LongtermDebtType
us-gaap:GainsLossesOnExtinguishmentOfDebt

us-gaap:IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest

us-gaap:IncomeTaxExpenseBenefit

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

us-gaap:NetIncomeLoss
us-gaap:StatementEquityComponents

us-gaap:NonoperatingIncomeExpense

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

us-gaap:OtherComprehensiveIncomeLossNetOfTax
us-gaap:StatementEquityComponents

us-gaap:OtherNonoperatingIncomeExpense

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:Revenues

us-gaap:SellingAndMarketingExpense

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:CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents

us-gaap:ShortTermInvestments

us-gaap:ReceivablesNetCurrent

us-gaap:PrepaidExpenseAndOtherAssetsCurrent

us-gaap:AssetsNoncurrent

us-gaap:PropertyPlantAndEquipmentNet

us-gaap:Goodwill
us-gaap:IndefiniteLivedIntangibleAssetsByMajorClass
us-gaap:IndefiniteLivedIntangibleAssetsExcludingGoodwill
us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName, us-gaap:IndefiniteLivedIntangibleAssetsByMajorClass

us-gaap:IntangibleAssetsNetExcludingGoodwill

us-gaap:DeferredTaxAssetsLiabilitiesNet

us-gaap:OperatingLeaseRightOfUseAsset

us-gaap:OtherAssetsNoncurrent

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

us-gaap:AccountsPayableCurrent
us-gaap:ProductOrService
us-gaap:ContractWithCustomerLiabilityCurrent

us-gaap:LiabilitiesCurrent

us-gaap:LongTermDebtCurrent

us-gaap:OperatingLeaseLiabilityCurrent

us-gaap:OtherAccruedLiabilitiesCurrent

us-gaap:LiabilitiesNoncurrent

us-gaap:LongTermDebt

us-gaap:LongTermDebtNoncurrent

us-gaap:LongTermDebtAndCapitalLeaseObligations

us-gaap:PensionAndOtherPostretirementDefinedBenefitPlansLiabilitiesNoncurrent
us-gaap:RetirementPlanType

us-gaap:OtherLiabilitiesNoncurrent

us-gaap:OperatingLeaseLiabilityNoncurrent

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearTwo

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearThree

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearFour

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearFive

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueAfterYearFive

us-gaap:OperatingLeaseLiability

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDue

us-gaap:LesseeOperatingLeaseLiabilityUndiscountedExcessAmount

us-gaap:StockholdersEquity
us-gaap:StatementEquityComponents

us-gaap:AdditionalPaidInCapitalCommonStock

us-gaap:RetainedEarningsAccumulatedDeficit

us-gaap:AccumulatedOtherComprehensiveIncomeLossNetOfTax

us-gaap:TreasuryStockValue

us-gaap:NetCashProvidedByUsedInOperatingActivities

us-gaap:NetCashProvidedByUsedInInvestingActivities

us-gaap:NetCashProvidedByUsedInFinancingActivities

us-gaap:CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect

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

us-gaap:NetCashProvidedByUsedInOperatingActivities

us-gaap:NetIncomeLoss
us-gaap:StatementEquityComponents

us-gaap:NetCashProvidedByUsedInInvestingActivities

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

us-gaap:NetCashProvidedByUsedInFinancingActivities

us-gaap:ProceedsFromIssuanceOfLongTermDebt
us-gaap:DebtInstrument, us-gaap:LongtermDebtType
us-gaap:DebtInstrument, us-gaap:LongtermDebtType
us-gaap:RepaymentsOfLongTermDebt

us-gaap:PaymentsOfDividends

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

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber

us-gaap:DeferredTaxAssetsNet

us-gaap:DeferredTaxAssetsValuationAllowance

dal:AncillaryBusinessesAndRefineryExpenses

dal:ContractWithCustomerLiabilityRefundToCustomer

dal:EmployeeRelatedCostReductionsNumberOfEmployeesVolunteeringForLeave

dal:FinancingTransactionsCompletedAmount
us-gaap:SubsequentEventType
dal:GrantPaymentsAsPercentageOfTotalPaymentsReceivedThroughPayrollSupportProgram

dal:GrantPaymentsReceivedThroughPayrollSupportProgram
dal:PayrollSupportProgram
us-gaap:StatementScenario

dal:GrantPaymentsReceivedThroughPayrollSupportProgramCARESAct

dal:GrantsRecognizedCARESAct

dal:GrantsRecognizedGovernmentGrants
dal:PayrollSupportProgram

dal:IncomeLossFromEquityMethodInvestmentsAndOtherThanTemporaryImpairment
us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName

dal:LoyaltyProgramLiabilityMileageCreditsEarned

dal:LoyaltyProgramLiabilityNonTravelMileageCreditsRedeemed

dal:LoyaltyProgramLiabilityTravelMileageCreditsRedeemed

dal:NumberOfAircraftRemovedFromActiveService

dal:OtherNoncashFinancings
us-gaap:CounterpartyName
dal:PaymentsToSupportEstablishmentOfStrategicAlliance

dal:ProceedsFromGovernmentAssistancePayrollSupportProgramCARESAct

dal:ProceedsFromGovernmentPayrollSupportProgram
dal:PayrollSupportProgram
us-gaap:StatementScenario
us-gaap:SubsequentEventType

dal:ProceedsFromPurchasingCard
us-gaap:SubsequentEventType
dal:ProceedsFromSettlementOfInterestRateSwapContracts

dal:ReductionInPlannedCapitalExpenditures

dal:ReliefReceivedThroughPayrollSupportProgramCARESAct

dal:SalesOfMileageCredits

dal:StockholdersEquityIncreaseDecreaseFromCommonStockIssuedAndCompensationExpenseFromEquityAwardsNetOfTreasurySharesWithheldForTaxesValue
us-gaap:StatementEquityComponents
us-gaap:SubsequentEventType
dal:SupportReceivedThroughPayrollSupportProgram
us-gaap:SubsequentEventType
dal:UnsecuredLoansAsPercentageOfTotalPaymentsReceivedThroughPayrollSupportProgram

dal:WeightedAveragePricePerTreasuryShareWithheldForTaxes

dal:YearOverYearDecreaseInSystemCapacityPercentage
us-gaap:AirlineDestinations
us-gaap:Range, us-gaap:StatementScenario
us-gaap:StatementScenario
us-gaap:StatementScenario, us-gaap:AirlineDestinations

us-gaap:AdjustmentsToAdditionalPaidInCapitalWarrantIssued
dal:PayrollSupportProgram, us-gaap:ClassOfWarrantOrRight
us-gaap:ClassOfWarrantOrRight
us-gaap:StatementEquityComponents

us-gaap:AircraftMaintenanceMaterialsAndRepairs

us-gaap:AircraftRental

us-gaap:AirlineCapacityPurchaseArrangements

us-gaap:ContractWithCustomerLiabilityRevenueRecognized

us-gaap:CostOfServicesCatering
us-gaap:RetirementPlanType
us-gaap:DefinedBenefitPlanAmortizationOfGainsLosses
us-gaap:RetirementPlanType
us-gaap:DefinedBenefitPlanAmortizationOfPriorServiceCostCredit
us-gaap:RetirementPlanType
us-gaap:DefinedBenefitPlanContributionsByEmployer
us-gaap:RetirementPlanType, us-gaap:SubsequentEventType
us-gaap:RestructuringCostAndReserve, us-gaap:RestructuringPlan
us-gaap:DefinedBenefitPlanCostOfProvidingSpecialOrContractualTerminationBenefitRecognizedDuringPeriod
us-gaap:RetirementPlanType
us-gaap:RetirementPlanType
us-gaap:DefinedBenefitPlanExpectedReturnOnPlanAssets
us-gaap:RetirementPlanType
us-gaap:DefinedBenefitPlanInterestCost
us-gaap:RetirementPlanType
us-gaap:DefinedBenefitPlanNetPeriodicBenefitCost
us-gaap:RetirementPlanType
us-gaap:DefinedBenefitPlanRecognizedNetGainLossDueToSettlements1
us-gaap:RetirementPlanType
us-gaap:DefinedBenefitPlanServiceCost
us-gaap:RetirementPlanType
us-gaap:DefinedBenefitPlanSpecialTerminationBenefits
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:EquitySecuritiesFvNiGainLoss

us-gaap:FuelCosts

us-gaap:ImpairmentOfLongLivedAssetsToBeDisposedOf
us-gaap:AircraftType

us-gaap:IncrementalCommonSharesAttributableToShareBasedPaymentArrangements

us-gaap:LaborAndRelatedExpense

us-gaap:LandingFeesAndOtherRentals

us-gaap:OtherComprehensiveIncomeLossBeforeReclassificationsNetOfTax
us-gaap:StatementEquityComponents

us-gaap:OtherComprehensiveIncomeLossTax

us-gaap:OtherCostAndExpenseOperating

us-gaap:PaymentsForFlightEquipment

us-gaap:PaymentsForProceedsFromOtherInvestingActivities
us-gaap:Range, us-gaap:StatementScenario, us-gaap:RestructuringPlan
us-gaap:PaymentsForRestructuring
us-gaap:RestructuringCostAndReserve, us-gaap:RestructuringPlan

us-gaap:PaymentsToAcquireLongtermInvestments

us-gaap:PaymentsToAcquireOtherProductiveAssets

us-gaap:PaymentsToAcquireShortTermInvestments
dal:PayrollSupportProgram, us-gaap:DebtInstrument, us-gaap:LongtermDebtType
us-gaap:ProceedsFromIssuanceOfUnsecuredDebt
us-gaap:DebtInstrument, us-gaap:LongtermDebtType

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:LongtermDebtType
us-gaap:RepaymentsOfLongTermLinesOfCredit
us-gaap:LongtermDebtType, us-gaap:SubsequentEventType
us-gaap:DebtInstrument, us-gaap:ShortTermDebtType, us-gaap:SubsequentEventType
us-gaap:RepaymentsOfShortTermDebt

us-gaap:RestructuringCharges
us-gaap:ConsolidationItems, us-gaap:StatementBusinessSegments
us-gaap:RestructuringPlan

us-gaap:RestructuringReserveAccrualAdjustment1

us-gaap:RightOfUseAssetObtainedInExchangeForFinanceLeaseLiability

us-gaap:RightOfUseAssetObtainedInExchangeForOperatingLeaseLiability
us-gaap:StatementEquityComponents
us-gaap:StockIssuedDuringPeriodSharesShareBasedCompensation

us-gaap:StockIssuedDuringPeriodValueShareBasedCompensation
us-gaap:StatementEquityComponents

dal:AirlineRelatedInventoryAircraftPartsAndSuppliesNet
us-gaap:BalanceSheetLocation
dal:CarryingAmountOfHedgedInstrumentsFairValueHedgeNet

dal:CashCashEquivalentsShortTermInvestmentsAndAmountsAvailableUnderRevolvingCreditFacilities
dal:PayrollSupportProgram, us-gaap:ClassOfWarrantOrRight
dal:ClassOfWarrantOrRightSharesCalledByWarrantsAsPercentageOfOutstandingShares
us-gaap:ClassOfWarrantOrRight
us-gaap:StatementScenario, us-gaap:ClassOfWarrantOrRight

dal:ContractWithCustomerLiabilityTravelCreditsAsPercentageOfTotalLiability
us-gaap:DebtInstrument, us-gaap:LongtermDebtType, us-gaap:SubsequentEventType
dal:DebtInstrumentLoanPerAgreementThroughPayrollSupportProgram
us-gaap:StatementScenario, us-gaap:DebtInstrument, us-gaap:LongtermDebtType

dal:DebtInstrumentUnamortizedDiscountPremiumAndDebtIssuanceCostsNetAfterYearFive

dal:DebtInstrumentUnamortizedDiscountPremiumAndDebtIssuanceCostsNetYearFive

dal:DebtInstrumentUnamortizedDiscountPremiumAndDebtIssuanceCostsNetYearFour

dal:DebtInstrumentUnamortizedDiscountPremiumAndDebtIssuanceCostsNetYearOne

dal:DebtInstrumentUnamortizedDiscountPremiumAndDebtIssuanceCostsNetYearThree

dal:DebtInstrumentUnamortizedDiscountPremiumAndDebtIssuanceCostsNetYearTwo

dal:DebtLongTermAndShortTermCombinedAmountFairValue

dal:DebtLongTermAndShortTermCombinedAmountGross

dal:DebtLongTermDebtCurrentAndShortTermDebt

dal:DeferredIncomeTaxExpenseBenefitInAccumulatedBalanceAndNotRecognizedUntilObligationFullyExtinguished
us-gaap:StatementEquityComponents

dal:DeferredTaxAssetsOperatingLeaseLiabilities

dal:DeferredTaxLiabilitiesOperatingLeaseRightOfUseAssets

dal:EquitySecuritiesAndEquityMethodInvestments
dal:EquitySecuritiesInvestmentName
dal:EquitySecuritiesFVNIOwnershipPercentage

dal:GrantsDeferredCARESAct
us-gaap:Range, us-gaap:IndefiniteLivedIntangibleAssetsByMajorClass
dal:IndefiniteLivedIntangibleAssetPercentageOfFairValueInExcessOfCarryingAmount
us-gaap:IndefiniteLivedIntangibleAssetsByMajorClass
dal:IndefiniteLivedIntangibleAssetPercentageOfFairValueInExcessOfCarryingAmountGreaterThan
us-gaap:Range, us-gaap:IndefiniteLivedIntangibleAssetsByMajorClass

dal:IndefiniteLivedIntangibleAssetsAndGoodwill

dal:LeaseLiability

dal:LeaseRightOfUseAsset

dal:LesseeFinanceLeaseAndOperatingLeaseLeaseNotYetCommencedAmount

dal:LettersOfCreditOutstandingThatReduceAvailabilityUnderRevolvingFacilitiesAmount

dal:NetObligationRenewableFuelComplianceFairValue
us-gaap:ConsolidationItems, us-gaap:StatementBusinessSegments

dal:NumberOfEmployeesTestedForCOVID19

dal:ObligationRenewableFuelComplianceAssetComponentFairValue

dal:ObligationRenewableFuelComplianceLiabilityComponentFairValue

dal:PercentageOfEmployeesRepresentedByUnionsUnderCollectiveBargainingAgreements
us-gaap:CounterpartyName, us-gaap:OtherCommitments
dal:RedevelopmentProjectMaximumReimbursementByCounterparty
us-gaap:OtherCommitments
dal:RedevelopmentProjectNetProjectCostsExpected
us-gaap:CounterpartyName, us-gaap:OtherCommitments
dal:RedevelopmentProjectTotalAppropriationToDateByCounterparty
us-gaap:OtherCommitments
dal:RedevelopmentProjectTotalProjectCostsExpected

dal:ShortTermDebtLongTermDebtCurrentMaturitiesAndFinanceLeaseLiabilityCurrent

dal:StrategicAlliancePlanEstimatedFutureDisbursementsToSupportEstablishmentOfAlliance
us-gaap:UnrecordedUnconditionalPurchaseObligationByCategoryOfItemPurchased
dal:UnrecordedUnconditionalPurchaseObligationDueAfterFourYears

dei:EntityNumberOfEmployees
dal:Employeegroups

us-gaap:AirlineRelatedInventoryAircraftFuel

us-gaap:AirlineRelatedInventoryValuationReserves
us-gaap:FinancingReceivableRecordedInvestmentByClassOfFinancingReceivable
us-gaap:AllowanceForDoubtfulAccountsReceivable

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

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

us-gaap:CapitalizedComputerSoftwareNet
us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FairValueByMeasurementFrequency
us-gaap:CashAndCashEquivalentsFairValueDisclosure
us-gaap:FairValueByMeasurementFrequency
dal:PayrollSupportProgram, us-gaap:ClassOfWarrantOrRight
us-gaap:ClassOfWarrantOrRightExercisePriceOfWarrantsOrRights1
us-gaap:ClassOfWarrantOrRight
us-gaap:StatementScenario, us-gaap:ClassOfWarrantOrRight
dal:PayrollSupportProgram, us-gaap:ClassOfWarrantOrRight
us-gaap:ClassOfWarrantOrRightNumberOfSecuritiesCalledByWarrantsOrRights
us-gaap:ClassOfWarrantOrRight
us-gaap:ClassOfWarrantOrRight, us-gaap:SubsequentEventType
us-gaap:StatementScenario, us-gaap:ClassOfWarrantOrRight

us-gaap:CommonStockCapitalSharesReservedForFutureIssuance
us-gaap:ProductOrService
us-gaap:ContractWithCustomerLiability
us-gaap:ProductOrService
us-gaap:ContractWithCustomerLiabilityNoncurrent

us-gaap:DebtInstrumentCarryingAmount
us-gaap:DebtInstrument, us-gaap:LongtermDebtType

us-gaap:DebtInstrumentUnamortizedDiscountPremiumAndDebtIssuanceCostsNet

us-gaap:DebtLongtermAndShorttermCombinedAmount

us-gaap:DeferredCreditsAndOtherLiabilities
dal:PayrollSupportProgram

us-gaap:DeferredIncomeTaxAssetsNet

us-gaap:DeferredIncomeTaxLiabilities

us-gaap:DeferredTaxAssetsCapitalLossCarryforwards

us-gaap:DeferredTaxAssetsDeferredIncome

us-gaap:DeferredTaxAssetsOperatingLossCarryforwards

us-gaap:DeferredTaxAssetsOther

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:DefinedBenefitPlanExpectedFutureEmployerContributionsNextFiscalYear
us-gaap:RetirementPlanType
us-gaap:DefinedBenefitPlanFundedStatusOfPlan

us-gaap:DefinedBenefitPlanHealthCareCostTrendRateAssumedNextFiscalYear
us-gaap:Range, us-gaap:EquitySecuritiesByInvestmentObjective
us-gaap:DefinedBenefitPlanPlanAssetsTargetAllocationPercentage

us-gaap:DefinedBenefitPlanUltimateHealthCareCostTrendRate1
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:DerivativeInstrumentRisk, us-gaap:DerivativeInstrumentsGainLossByHedgingRelationship, us-gaap:HedgingDesignation
us-gaap:BalanceSheetLocation, us-gaap:DerivativeInstrumentRisk, us-gaap:HedgingDesignation
us-gaap:BalanceSheetLocation
us-gaap:DerivativeFairValueOfDerivativeAssetAmountNotOffsetAgainstCollateral
us-gaap:BalanceSheetLocation
us-gaap:DerivativeFairValueOfDerivativeLiability
us-gaap:BalanceSheetLocation, us-gaap:DerivativeInstrumentRisk, us-gaap:HedgingDesignation
us-gaap:BalanceSheetLocation
us-gaap:DerivativeFairValueOfDerivativeLiabilityAmountNotOffsetAgainstCollateral

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

us-gaap:EmployeeRelatedLiabilitiesCurrent

us-gaap:EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized
us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName
us-gaap:EquityMethodInvestmentOwnershipPercentage
us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName
us-gaap:EquityMethodInvestments
us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:InvestmentType
us-gaap:FairValueInvestmentsEntitiesThatCalculateNetAssetValuePerShareUnfundedCommittments

us-gaap:FairValueLiabilitiesMeasuredOnRecurringBasisObligations
us-gaap:ConsolidationItems, us-gaap:StatementBusinessSegments

us-gaap:FinanceLeaseLiability

us-gaap:FinanceLeaseLiabilityCurrent

us-gaap:FinanceLeaseLiabilityNoncurrent

us-gaap:FinanceLeaseLiabilityPaymentsDue

us-gaap:FinanceLeaseLiabilityPaymentsDueAfterYearFive

us-gaap:FinanceLeaseLiabilityPaymentsDueNextTwelveMonths

us-gaap:FinanceLeaseLiabilityPaymentsDueYearFive

us-gaap:FinanceLeaseLiabilityPaymentsDueYearFour

us-gaap:FinanceLeaseLiabilityPaymentsDueYearThree

us-gaap:FinanceLeaseLiabilityPaymentsDueYearTwo

us-gaap:FinanceLeaseLiabilityUndiscountedExcessAmount

us-gaap:FinanceLeaseRightOfUseAsset

us-gaap:FinanceLeaseWeightedAverageDiscountRatePercent

us-gaap:FiniteLivedIntangibleAssetsAccumulatedAmortization
us-gaap:FiniteLivedIntangibleAssetsByMajorClass

us-gaap:FiniteLivedIntangibleAssetsAmortizationExpenseNextTwelveMonths

us-gaap:FiniteLivedIntangibleAssetsAmortizationExpenseYearFive

us-gaap:FiniteLivedIntangibleAssetsAmortizationExpenseYearFour

us-gaap:FiniteLivedIntangibleAssetsAmortizationExpenseYearThree

us-gaap:FiniteLivedIntangibleAssetsAmortizationExpenseYearTwo
us-gaap:GuaranteeObligationsByNature, us-gaap:UnderlyingAssetClass
us-gaap:GuaranteeObligationsMaximumExposure

us-gaap:HedgedLiabilityDiscontinuedFairValueHedgeCumulativeIncreaseDecrease
us-gaap:BalanceSheetLocation
us-gaap:HedgedLiabilityFairValueHedgeCumulativeIncreaseDecrease
us-gaap:ImpairedAssetsToBeDisposedOfByMethodOtherThanSaleByType
us-gaap:ImpairedAssetsToBeDisposedOfByMethodOtherThanSaleCarryingValueOfAsset

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

us-gaap:LongTermDebtAndCapitalLeaseObligationsCurrent

us-gaap:LongTermDebtFairValue
dal:PayrollSupportProgram, us-gaap:DebtInstrument, us-gaap:LongtermDebtType
us-gaap:DebtInstrument, us-gaap:LongtermDebtType

us-gaap:LongTermDebtMaturitiesRepaymentsOfPrincipalAfterYearFive

us-gaap:LongTermDebtMaturitiesRepaymentsOfPrincipalInNextTwelveMonths

us-gaap:LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFive

us-gaap:LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFour

us-gaap:LongTermDebtMaturitiesRepaymentsOfPrincipalInYearThree

us-gaap:LongTermDebtMaturitiesRepaymentsOfPrincipalInYearTwo
us-gaap:CounterpartyName, us-gaap:AccountsNotesLoansAndFinancingReceivableByReceivableType
us-gaap:NotesReceivableNet
us-gaap:CounterpartyName
us-gaap:NotesReceivableRelatedParties

us-gaap:OperatingLeaseWeightedAverageDiscountRatePercent

us-gaap:OperatingLossCarryforwards
us-gaap:CounterpartyName
us-gaap:OtherNotesPayable
us-gaap:CounterpartyName, us-gaap:DebtInstrument
us-gaap:DebtInstrument
us-gaap:RetirementPlanType
us-gaap:PensionAndOtherPostretirementDefinedBenefitPlansCurrentLiabilities
us-gaap:RetirementPlanType
us-gaap:PensionAndOtherPostretirementDefinedBenefitPlansLiabilitiesCurrentAndNoncurrent

us-gaap:PropertyPlantAndEquipmentAndFinanceLeaseRightOfUseAssetAccumulatedDepreciationAndAmortization
us-gaap:PropertyPlantAndEquipmentByType

us-gaap:PropertyPlantAndEquipmentAndFinanceLeaseRightOfUseAssetAfterAccumulatedDepreciationAndAmortization
us-gaap:PropertyPlantAndEquipmentByType
us-gaap:PropertyPlantAndEquipmentAndFinanceLeaseRightOfUseAssetBeforeAccumulatedDepreciationAndAmortization
us-gaap:Range
us-gaap:ReportingUnitPercentageOfFairValueInExcessOfCarryingAmount

us-gaap:RestrictedCashAndCashEquivalentsAtCarryingValue

us-gaap:RestrictedCashAndCashEquivalentsNoncurrent

us-gaap:RestrictedCashCurrent
us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FairValueByMeasurementFrequency
us-gaap:RestrictedInvestmentsAtFairValue
us-gaap:FairValueByMeasurementFrequency
us-gaap:AwardType
us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableNumber

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableWeightedAverageExercisePrice
us-gaap:DebtInstrument, us-gaap:ShortTermDebtType
us-gaap:ShortTermBorrowings

us-gaap:ShortTermNonBankLoansAndNotesPayable
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:UnrecordedUnconditionalPurchaseObligationByCategoryOfItemPurchased
us-gaap:UnrecordedUnconditionalPurchaseObligationDueInRemainderOfFiscalYear

Plots across concepts


IncomeStatement
Other Comprehensive Income Loss Net Of Tax
Expenses
Other Nonoperating Income Expense
Balance Sheet
Stockholders Equity
Assets
Operating Lease Right Of Use Asset
Current Assets
Prepaid Expense And Other Assets Current
NonCurrent Assets
Other Assets Noncurrent
Liabilities
Operating Lease Liability
Current Liabilities
Operating Lease Liability Current
Noncurrent Liabilities
Other Liabilities Noncurrent
Stockholders Equity
Accumulated Other Comprehensive Income Loss Net Of Tax
CashFlow
Net Cash Provided By Used In Financing Activities
NetCashProvidedByUsedInOperatingActivities
Net Income Loss
NetCashProvidedByUsedInInvestingActivities
Payments For Proceeds From Other Investing Activities
NetCashProvidedByUsedInFinancingActivities
Net Cash Provided By Used In Financing Activities
Shares
Weighted Average Number Of Shares Outstanding Basic
OperatingLeaseLiability
Operating Lease Liability Current
NonoperatingIncomeExpense
Nonoperating Income Expense
LesseeOperatingLeaseLiabilityPaymentsDue
Lessee Operating Lease Liability Payments Due Year Four
AccountsReceivable
Allowance For Doubtful Accounts Receivable Current

Tables

  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312009-09-302009-06-302009-03-31
 us-gaap:SharesIssued us-gaap:StatementEquityComponents us-gaap:CommonStock▁▁▁▁▁▁▂▂▂▃▅▆▆██650.0649.0647.0647.0647.0647.0652.0656.0659.0664.0688.0694.0699.0711.0715.0NANANA745.0NANANA800.0NANANA845.0NANANA869.0NANANA868.0NANANA861.0NANANA848.0NANANA795.0NANANA
 us-gaap:SharesIssued us-gaap:StatementEquityComponents us-gaap:TreasuryStock██▆███▆▆▆▆▃▃▃▃▁10.010.09.010.010.010.09.09.09.09.08.08.08.08.07.0NANANA14.0NANANA21.0NANANA20.0NANANA18.0NANANA16.0NANANA16.0NANANA13.0NANANA11.0NANANA
us-gaap:WeightedAverageNumberOfDilutedSharesOutstanding █▁642.0636.0NA635.0635.0637.0NA648.0652.0667.0NA688.0697.0706.0NA719.0731.0731.0NA744.0763.0780.0NA795.0811.0826.0NA843.0850.0853.0NA861.0859.0855.0NA850.0845.0847.0NA844.0844.0837.0NA842.0842.0NANANANANA
us-gaap:WeightedAverageNumberOfSharesOutstandingBasic █▁637.0636.0NA635.0635.0637.0NA646.0650.0665.0NA686.0695.0704.0NA716.0728.0728.0NA740.0758.0774.0NA788.0803.0818.0NA834.0841.0844.0NA851.0850.0848.0NA846.0845.0843.0NA838.0838.0837.0NA835.0834.0NANANANANA
us-gaap:EarningsPerShareBasic ▅▄▄▁▁▄▅▅▅▅▅▅▅▅▅▅▅▅▅▅▅▅▅▅▅▅▄▄▅▄█▅▅▄▄▅▄▄▅▅▄▄▄▄▅▄1.02-1.85-1.1899999999999977-8.47-9.01-0.841.712.322.221.11.51.911.470.780.811.641.680.830.851.72.041.221.261.671.850.91-0.860.430.950.2510.021.610.810.010.011.24-0.20.150.510.660.24-0.380.020.430.56-0.31NANANANA
us-gaap:EarningsPerShareDiluted ▅▄▄▁▁▄▅▅▅▅▅▅▅▅▅▅▅▅▅▅▅▅▅▅▅▅▄▄▅▄█▅▅▄▄▅▄▄▅▅▄▄▄▄▅▄1.02-1.85-1.1899999999999977-8.47-9.01-0.841.712.312.211.091.491.911.470.770.81.641.680.820.841.692.031.211.251.651.830.9-0.860.420.940.259.891.590.80.010.011.23-0.20.150.50.650.23-0.380.020.430.55-0.31NANANANA
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312009-09-302009-06-302009-03-31
 Operating Margin us-gaap:ConsolidationItems,us-gaap:StatementBusinessSegments us-gaap:OperatingSegments,dal:Airline▄▂▂▂▁▆▇██▇▇█▇▆▆▇▇▆▆▇▇▆▆▇▇▆6349.03610.03532.02645.01176.08592.011436.012554.012496.010424.010731.011845.011559.09755.09983.010932.010680.09087.09174.010473.010398.09172.09498.010994.010592.09314.0NANANANANANANANANANANANANANANANANANANANANANANANA
 Operating Margin us-gaap:ConsolidationItems,us-gaap:StatementBusinessSegments us-gaap:OperatingSegments,dal:Refinery▇▄▃▂▁▅▆▇▇▆▂██▇▆▆▅▅▄▄▄▃▄▆▆▅1434.01047.0777.0669.0513.01184.01269.01505.01501.01283.0691.01609.01667.01491.01415.01357.01139.01128.01080.0971.01027.0765.0986.01258.01357.01140.0NANANANANANANANANANANANANANANANANANANANANANANANA
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312009-09-302009-06-302009-03-31
 TTM Greenblatt ROC _ _▇▅▅▁▂▆▇██▇▇▇▇▇▇▇█▇▇██▇▇██▇▅▇▇▇▇▇▇▆▆▇▆▆▇▇▆▆▆▇▇▆▆816.0-1398.0-858.0-6386.0-4815.0-410.01399.02071.02128.01020.01090.01642.01680.0840.01193.01839.02028.01053.01020.01969.02423.01540.01717.02213.02474.01398.0-828.0835.01579.0620.0701.01563.0914.0222.0352.01308.0134.0382.0726.0860.0481.0-92.0294.01003.0852.068.0-46.0NANANA
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312009-09-302009-06-302009-03-31
us-gaap:ComprehensiveIncomeNetOfTax ▄▃▃▁▁▃▄▄▄▄▄▄▄▄▃▄▄▄▃▄▄▄▄▄▄▄▂▃▄▃█▄▄▃▂▄▃▃▂▃▃▃▃▄▃▃730.0-1099.0-1854.0-5381.0-5756.0-443.0754.01545.01515.0789.0867.01383.01100.0487.0427.01251.01246.0668.0198.01326.01546.0942.01021.01287.01491.0763.0-2923.0394.0803.0204.011673.01376.0780.0158.0-2107.01073.0-140.0372.0-2617.0418.08.0-143.0157.0500.0116.0-195.0NANANANA
us-gaap:CostsAndExpenses ▃▂▁▇▃▆▇██▇6310.05548.04831.09448.06283.09002.010040.010489.010408.09452.0NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA8672.07839.0NANA7316.06780.0NANANANA
us-gaap:GainLossOnInvestments NANA94.0-95.08.0-112.0136.0-35.0-82.0100.0185.050.0-238.018.00.00.00.0NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
 us-gaap:GainsLossesOnExtinguishmentOfDebt us-gaap:DebtInstrument,us-gaap:LongtermDebtType dal:TermLoan2020,us-gaap:SecuredDebtNA-56.0NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest ▇▅▅▁▁▆▇██▇▇▇▇▇▇██▇▇██▇▇██▇▅▇▇▆▇▇▇▆▆▇▆▆▇▇▆▆▆▇776.0-1515.0-1108.0-6859.0-7014.0-607.01398.01947.01907.0946.01387.01674.01372.0718.01090.01805.01891.0915.0952.01900.02350.01434.01533.02072.02366.01186.0-1140.0579.01298.0335.0475.01363.0686.03.011.01052.0-164.0127.0417.0547.0195.0-389.020.0366.0NANANANANANA
us-gaap:IncomeTaxExpenseBenefit ▇▇▇▆▆▇███▇███▇████████████▇▇█▇▁▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇124.0-338.0-353.0-1480.0-1297.0-73.0300.0452.0464.0216.0336.0362.0347.0171.0518.0627.0667.0312.0330.0641.0804.0488.0553.0757.0881.0440.0-428.0222.0497.0122.0-8004.0-6.01.0-4.05.05.04.03.0-8.0-2.0-3.0-71.01.03.01.010.0NANANANA
us-gaap:InterestIncomeExpenseNet ▂▁▁▃▅▇▇▇▇▇█▇▇▇▇▇▇▇▇▇▇▇▇▆▆▆▅▆▅▅▅▅▅▅▅▅▄▄▄▄▄▄▄▃-338.0-361.0-365.0-291.0-194.0-79.0-73.0-70.0-75.0-83.0-37.0-84.0-89.0-102.0-99.0-100.0-103.0-94.0-93.0-95.0-93.0-107.0-102.0-121.0-127.0-131.0-190.0-140.0-155.0-165.0-172.0-176.0-172.0-178.0-189.0-195.0-207.0-221.0-218.0-229.0-233.0-221.0-219.0-249.0NANANANANANA
 us-gaap:InterestIncomeExpenseNet us-gaap:ConsolidationItems,us-gaap:StatementBusinessSegments us-gaap:OperatingSegments,dal:Airline▂▁▁▃▅▇▇▇▇▇█▇▇▇▇▇▇-337.0-360.0-364.0-288.0-196.0-80.0-80.0-70.0-84.0-92.0-37.0-94.0-97.0-97.0-106.0-100.0-103.0NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
 us-gaap:InterestIncomeExpenseNet us-gaap:ConsolidationItems,us-gaap:StatementBusinessSegments us-gaap:OperatingSegments,dal:Refinery▄▄-1.0-1.0NA-3.02.01.07.00.09.09.00.010.08.05.07.00.00.0NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:NetIncomeLoss ▄▃▃▁▁▄▄▅▅▄▄▄▄▄▄▄▄▄▄▄▅▄▄▄▅▄▃▄▄▄█▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▃652.0-1177.0-755.0-5379.0-5717.0-534.01099.01495.01443.0730.01019.01312.01025.0547.0572.01178.01224.0603.0622.01259.01546.0946.0980.01315.01485.0746.0-712.0357.0801.0213.08479.01369.0685.07.07.01047.0-168.0124.0425.0549.0198.0-318.019.0363.0467.0-256.0-25.0-161.0-257.0-794.0
us-gaap:NonoperatingIncomeExpense ▇▇▆▆▁▇▇▇▇▇█▇▆▇▇▇▇▇▇▇▇▇▇▇▇▇▆▆▆▆▇▇▇▇▆▆▆▆▆▆▆▆▆▅▆▆-40.0-117.0-250.0-473.0-2199.0-197.0-1.0-124.0-221.0-74.0284.032.0-308.0-122.0-104.0-34.0-137.0-138.0-68.0-69.0-73.0-106.0-184.0-141.0-108.0-212.0-312.0-256.0-281.0-285.0-226.0-200.0-228.0-219.0-340.0-256.0-298.0-255.0-309.0-313.0-286.0-297.0-274.0-637.0-384.0-314.0NANANANA
us-gaap:OperatingIncomeLoss ▇▅▅▁▂▆▇██▇▇▇▇▇▇▇█▇▇██▇▇██▇▅▇▇▇▇▇▇▆▆▇▆▆▇▇▆▆▆▇▇▆▆▆▆▆816.0-1398.0-858.0-6386.0-4815.0-410.01399.02071.02128.01020.01090.01642.01680.0840.01193.01839.02028.01053.01020.01969.02423.01540.01717.02213.02474.01398.0-828.0835.01579.0620.0701.01563.0914.0222.0352.01308.0134.0382.0726.0860.0481.0-92.0294.01003.0852.068.0-46.0204.01.0-483.0
us-gaap:OtherComprehensiveIncomeLossNetOfTax ▄▄78.078.0NA-2.0-39.091.0NA49.072.059.0NA71.075.046.0NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:OtherNonoperatingIncomeExpense ▇▆▅▆▆▅▃▄▃▃█▆▅▄▅▆▄▄▅▅▅▅▃▄▅▃▁▆▅▃▄▅▅▅▅▅▄▅▅▄▅▅▅▅▃▅87.036.021.027.045.0-6.0-64.0-19.0-64.0-91.0136.066.019.0-38.0-5.066.0-34.0-44.025.026.020.01.0-82.0-20.019.0-81.0-170.032.03.0-81.0-20.013.0-15.01.00.0-1.0-42.017.0-9.0-31.06.0-9.022.025.0-72.0-8.0NANANANA
us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax ▅▃▃▂▁▅▇██▇▇██▆▇▇▇▆▆▇▇▆▆▇▇▆▆▇▇▆▆▇▆▅▆▆▆▅▅▆▆▅▅▆▅▄▄▅▄▄7126.04150.03973.03062.01468.08592.011439.012560.012536.010472.010742.011953.011775.09968.010245.011061.010747.09148.09458.010483.010447.09251.09502.011107.010707.09388.09647.011178.010621.08916.09076.010490.09707.08500.08602.09923.09732.08413.08399.09816.09153.07747.07789.08950.08168.06848.06805.07574.07000.06684.0
us-gaap:Revenues ▅▃▃▂▁▅▇██▇▇██▆▇▇▇▆▆▇▇▆▆▇▇▆▆▇▇▆▆▇▆▅▆▆▆▅▅▆▆▅▅▆▅▄▄▅▄▄7126.04150.03973.03062.01468.08592.011439.012560.012536.010472.010742.011953.011775.09968.010245.011060.010791.09148.09458.010483.010447.09251.09502.011107.010707.09388.09647.011178.010621.08916.09076.010490.09707.08500.08602.09923.09732.08413.08399.09816.09153.07747.07789.08950.08168.06848.06805.07574.07000.06684.0
us-gaap:SellingAndMarketingExpense ▄▂▂▂▁▅▇██▆▇██▆▇▇▇▆▆▇▇▆▆▇▆▆▆▇▇▆▆▇▆▅▆▇▆▆▆▇▇▆▆▆▆▆222.0110.084.094.045.0358.0488.0539.0538.0427.0468.0535.0511.0427.0443.0482.0458.0404.0419.0466.0437.0388.0402.0463.0421.0386.0411.0476.0440.0373.0391.0447.0408.0357.0377.0440.0393.0380.0393.0480.0440.0369.0364.0404.0377.0364.0NANANANA
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312009-09-302009-06-302009-03-31
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312009-09-302009-06-302009-03-31
us-gaap:Assets ▇▇▇█▇▆▅▅▅▅▄▃▃▃▃▃▃▃▃▃▃▃▃▃▃▃▃▃▃▃▃▂▂▁▁▁▁▁▁▁▁▁▁75309.073083.071996.079076.072261.068738.064532.063219.062518.061841.060266.055003.055796.054078.053292.051928.051815.051459.051261.050948.051634.053342.053134.053646.052781.053752.054121.051940.052191.052167.052252.045997.045772.045068.044550.044352.044720.044189.043499.043036.043878.043881.043188.0NANANA43789.0NANANA
us-gaap:LiabilitiesAndStockholdersEquity ▇▇▇█▇▆▅▅▅▅▄▃▃▃▃▃▃▃▃▃▃▃▃▃▃▃▃▃▃▃▃▂▂▁▁▁▁▁▁▁▁▁▁75309.073083.071996.079076.072261.068738.064532.063219.062518.061841.060266.055003.055796.054078.053292.051928.051815.051459.051261.050948.051634.053342.053134.053646.052781.053752.054121.051940.052191.052167.052252.045997.045772.045068.044550.044352.044720.044189.043499.043036.043878.043881.043188.0NANANA43789.0NANANA
us-gaap:StockholdersEquity ▂▂▂▃▅███▇▇▇▇▇▇▇▇▇▇▇▇▇▆▆▆▆▅▅▇▇▇▇▂▁▁▁▂▁▁▁▂▂▂▂1281.0482.01534.03357.08690.014309.015358.015068.013958.012911.013687.013704.012856.012557.013910.014001.013479.012945.012287.012510.011810.011252.010850.010345.09563.09046.08813.012296.012203.011641.011643.0137.0-1184.0-1943.0-2131.0-48.0-1135.0-1011.0-1396.01222.0785.0758.0897.0NANANA245.0NANANA
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312009-09-302009-06-302009-03-31
us-gaap:AssetsCurrent ▆▅▅█▆▂▂▁▁▁▁▁▁▂▂▁▁▁▁▁▁▂▂▃▃▃▃▃▃▂▂▂▂▂▂▂▂▂▂▁▂▂▁19666.017853.017404.025030.018915.010275.08249.06944.07134.07196.06340.06726.07641.07724.07844.07083.07177.06880.07451.07329.07638.09306.09056.011973.011441.012266.012465.010995.010517.09746.09651.08951.08895.08641.08272.08163.08457.08299.07729.07329.08063.07993.07307.0NANANA7991.0NANANA
us-gaap:CashAndCashEquivalentsAtCarryingValue ▅▄▄█▆▃▂▁▁▁▁▁▁▁▁▁▁▁▂▁▁▁▁▁▁▁▁▂▂▂▂▂▂▂▁▁▂▂▂▁▂▂▂▂▂▃▂10357.08460.08307.016477.011366.05967.02882.01899.02009.01910.01565.01380.01886.01447.01814.01478.02241.01907.02762.01638.01662.01708.01972.02369.02293.02122.02088.02510.03362.02699.02844.03018.02965.02636.02416.02274.02539.02911.02657.02307.02855.02881.02892.03436.04434.04913.04607.0NANANA
us-gaap:CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents ▅▄▅█▅▃▂▂▂▂▂▁▂▁▁▁▁▁▂11458.09896.010055.018346.011818.06461.03730.02698.03029.02985.02748.02648.03260.01482.01853.01517.02305.01968.02826.0NANANA2026.0NANANANANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:ShortTermInvestments ▄▇█▅▁4873.05575.05789.05048.04302.0NA0.0NANANA203.0478.0520.0523.0825.0960.0747.0743.0487.01514.01289.01206.01465.01442.01494.01447.01217.01852.0719.0959.0959.0959.0958.0958.0958.0959.0959.0959.0958.0958.0967.0958.0718.0NANANA71.0NANANA
us-gaap:ReceivablesNetCurrent ▄▃▁▂▁▅▇▇▇█▅▅▅▆▅▅▄▅▄▃▄▄▄▃▃▄▅▄▄▄▂▃▄▃▂▃▃▃▂▃▃▃▁2258.01837.01396.01503.01375.02280.02854.02836.02844.03154.02314.02517.02427.02568.02377.02399.02164.02307.02064.01996.02102.02179.02020.01974.01966.02057.02297.02135.02104.02042.01609.01969.02084.01994.01693.01785.01828.01807.01563.01816.01885.01848.01456.0NANANA1353.0NANANA
us-gaap:PrepaidExpenseAndOtherAssetsCurrent ▃▃▃▄▃▃▄▃▃▃▄▃▄█▅▃▃▃▂▂▃▂▁▁▁▁▁▄▄▄▄▄▄▄▄▇▇▅▅▃▃1173.01153.01180.01256.01025.01054.01262.01137.01198.01061.01203.01181.01219.02040.01499.01110.01087.01068.0854.0910.01017.0887.0796.0816.0815.0790.0733.01220.01221.01209.01318.01355.01302.01304.01344.01876.01882.01475.01418.01067.01179.0NA1159.0NANANANANANANA
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312009-09-302009-06-302009-03-31
us-gaap:AssetsNoncurrent ▄▄▃▂▁█▅▅▄▃▂55643.055230.054592.054046.053346.058463.056283.056275.055384.054645.053926.0NANANA45867.0NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:PropertyPlantAndEquipmentNet NANANA26600.0NANANA30796.030165.029139.028335.028565.028124.027096.026563.025900.025367.024817.024375.024105.023975.023422.023039.022608.022480.022023.021929.021722.022048.021972.021854.021297.021049.020793.020713.020599.020609.020332.020223.020256.020315.020333.020307.0NANANA20433.0NANANA
us-gaap:Goodwill ▁▁▁▁▁▁▆▆▆▆▆████████████████████████████████9753.09753.09753.09753.09753.09753.09781.09781.09781.09781.09781.09794.09794.09794.09794.09794.09794.09794.09794.09794.09794.09794.09794.09794.09794.09794.09794.09794.09794.09794.09794.09794.09794.09794.09794.09794.09794.09794.09794.09794.09794.09794.09794.0NANANA9787.0NANANA
 us-gaap:IndefiniteLivedIntangibleAssetsExcludingGoodwill us-gaap:IndefiniteLivedIntangibleAssetsByMajorClass dal:AirlineAlliancesNANA1863.01863.01863.01863.01005.0NANANA661.0NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
 us-gaap:IndefiniteLivedIntangibleAssetsExcludingGoodwill us-gaap:IndefiniteLivedIntangibleAssetsByMajorClass dal:DomesticSlotsNANA622.0622.0622.0622.0622.0NANANA622.0NANANA622.0NANANA622.0NANANA622.0NANANA622.0NANANA622.0NANANA622.0NANANA624.0NANANA502.0NANANANANANANA
 us-gaap:IndefiniteLivedIntangibleAssetsExcludingGoodwill us-gaap:IndefiniteLivedIntangibleAssetsByMajorClass dal:InternationalRoutesAndSlotsNANA2583.02583.02583.02583.02583.0NANANA2583.0NANANA2583.0NANANA2563.0NANANA2563.0NANANA2287.0NANANA2287.0NANANA2240.0NANANA2240.0NANANA2290.0NANANA2290.0NANANA
 us-gaap:IndefiniteLivedIntangibleAssetsExcludingGoodwill us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName,us-gaap:IndefiniteLivedIntangibleAssetsByMajorClass dal:LATAMAirlinesGroupSA,dal:AirlineAlliancesNANA1200.0NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:IntangibleAssetsNetExcludingGoodwill ██████▄▂▂▂▂▂▂▂▂▂▂▂▂▂▂▂▂▁▁▁▁▁▁▁▁▁▂▂▁▂▂▂▂▂6006.06009.06011.06014.06017.06019.05163.04821.04824.04827.04830.04835.04839.04843.04847.04851.04855.04855.04844.04848.04852.04856.04861.04589.04594.04599.04603.04614.04625.04642.04658.04675.04692.04709.04679.04697.04716.04733.04751.04697.0NANA4749.0NANANANANANANA
us-gaap:DeferredTaxAssetsLiabilitiesNet NANA1988.0NANANANANANANA79.0NANANA935.0NANANA3064.0NANANA4956.0NANANA7595.0NANANA6728.0NANANA-1584.0NANANA-1567.0NANANA-1569.0NANANA-1560.0NANANA
us-gaap:OperatingLeaseRightOfUseAsset ▃▂▄▆▃▁▃▅▆█▇5653.05577.05733.05881.05650.05488.05627.05815.05906.06036.05994.0NANANA0.0NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:OtherAssetsNoncurrent ▂▂▂▂▂▂▇█▇▇▇▆▆▆▆▅▄▄▃▃▂▂▂▃▁▁▁▁▁▁▂▂▂▁▁▁▁▁▁▁▁▁▁1493.01571.01357.01249.01481.01420.03766.04309.03815.03844.03608.03437.03268.03446.03309.02878.02545.02363.01733.01722.01578.01475.01428.01848.01098.01019.01010.01119.01105.01159.01303.01280.01342.01131.01092.01099.01144.01031.01002.0960.0992.01030.01031.0NANANA749.0NANANA
us-gaap:EquitySecuritiesFvNi NANA1417.01310.01384.01367.01099.0NANANA1090.0NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
 us-gaap:EquitySecuritiesFvNi dal:EquitySecuritiesInvestmentName dal:AirFranceKLM▂▃▄▁▂▃█181.0225.0235.0130.0170.0211.0418.0NANANA408.0NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
 us-gaap:EquitySecuritiesFvNi dal:EquitySecuritiesInvestmentName dal:ChinaEastern▄▅▄▄▁▁█197.0219.0201.0199.0166.0159.0258.0NANANA259.0NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
 us-gaap:EquitySecuritiesFvNi dal:EquitySecuritiesInvestmentName dal:ClearSecureInc331.0NA120.0NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
 us-gaap:EquitySecuritiesFvNi dal:EquitySecuritiesInvestmentName dal:HanjinKAL▇▅▇▇█▇▁517.0447.0512.0517.0588.0538.0205.0NANANA0.0NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
 us-gaap:EquitySecuritiesFvNi dal:EquitySecuritiesInvestmentName dal:OtherEquitySecurityFVInvestments234.0NA469.0230.0226.0225.0218.0NANANA210.0NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
 us-gaap:EquitySecuritiesFvNi dal:EquitySecuritiesInvestmentName dal:WheelsUp██▄▄▄▄▁520.0520.0210.0234.0234.0234.00.0NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
 us-gaap:EquitySecuritiesFvNi us-gaap:FairValueByFairValueHierarchyLevel,us-gaap:FairValueByMeasurementFrequency us-gaap:FairValueInputsLevel1,us-gaap:FairValueMeasurementsRecurring█▂▃▁▂▂▂▄▃▃▂1230.0895.0948.0846.0924.0908.0881.01009.0980.0970.0880.0NANANA485.0NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
 us-gaap:EquitySecuritiesFvNi us-gaap:FairValueByFairValueHierarchyLevel,us-gaap:FairValueByMeasurementFrequency us-gaap:FairValueInputsLevel2,us-gaap:FairValueMeasurementsRecurring██▁▄▄▇▃▃▃▃▃557.0557.038.0230.0226.0459.0218.0205.0205.0204.0204.0NANANA28.0NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
 us-gaap:EquitySecuritiesFvNi us-gaap:FairValueByFairValueHierarchyLevel,us-gaap:FairValueByMeasurementFrequency us-gaap:FairValueInputsLevel3,us-gaap:FairValueMeasurementsRecurring▁▄█▄▄101.0221.0431.0234.0234.0NA185.0NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
 us-gaap:EquitySecuritiesFvNi us-gaap:FairValueByMeasurementFrequency us-gaap:FairValueMeasurementsRecurring█▆▄▃▄▃▁▂▂▂▁1888.01673.01417.01310.01384.01367.01099.01214.01185.01174.01084.0NANANA513.0NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312009-09-302009-06-302009-03-31
us-gaap:AccountsPayableCurrent █▇▅▃▃▆▆▇▆▆▅▆▇▆▇▅▄▃▄▄▅▄▄▄▅▄▄▄▄▃▃▄▄▃▃▃▃▂▁▁▂▂▁3930.03432.02840.02403.02332.03337.03266.03470.03359.03214.02976.03265.03749.03351.03674.03059.02726.02353.02572.02567.02956.02732.02743.02688.02803.02492.02622.02577.02536.02341.02300.02592.02571.02405.02293.02325.02175.01998.01600.01641.01900.01907.01713.0NANANA1249.0NANANA
 us-gaap:ContractWithCustomerLiabilityCurrent us-gaap:ProductOrService dal:PassengerAirTraffic█▄▁▂▃▅▄▅█▇▃▅▇6798.05105.04044.04379.04686.05598.05116.05762.06616.06600.04661.05535.06360.0NA4364.0NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
 us-gaap:ContractWithCustomerLiabilityCurrent us-gaap:ProductOrService dal:ProductAndServiceOtherLoyaltyProgram▆▅▃▂▁▁██▇▇▇2757.02439.01777.01284.01195.01099.03219.03200.03048.03013.02989.0NANANA2762.0NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:LiabilitiesCurrent █▆▄▆▆▆▆▆▇▇▅▅▆▆▅▄▄▄▃▃▄▅▅▅▄▄▄▃▃▃▃▃▃▃▂▂▃▂▂▁▂▂▁23573.020688.015927.019725.020150.019392.020204.020211.021164.021323.018578.018158.019269.020012.018573.016496.016631.015953.015239.015147.016250.018108.017526.017608.017082.017319.016879.014813.015209.015010.014152.014134.014775.014068.013270.013224.014693.013646.012701.012012.012802.012260.011385.0NANANA9797.0NANANA
us-gaap:LongTermDebtCurrent ▄█▁2019.02671.01443.0NANANA2054.01953.02087.02954.01409.01080.01256.0NA2145.0NANANA1009.0NANANA1415.0NANANA1109.0NANANA1449.0NANANA1507.0NANANA1827.0NANANA-1954.0NANANA-1445.0NANANA
us-gaap:OperatingLeaseLiabilityCurrent ▁▁▂▃▃▄▅▆▅██638.0653.0678.0714.0732.0768.0801.0844.0841.0941.0955.0NANANA0.0NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:OtherAccruedLiabilitiesCurrent █▆▃▆▇▃▂▂▃▃▂▃▃▅▄▅▅▅▃▃▃▄▃▃▃▄▄▂▁▂▂▁▁▂▂▂▃▂▄▂▁▁▁3763.02794.01670.02896.03327.01309.01078.01181.01335.01397.01117.01329.01521.02404.01858.02243.02457.02619.01650.01366.01503.01719.01306.01379.01468.01991.02127.0902.0768.0837.01121.0571.0754.0873.01128.0985.01641.01041.01867.0861.0727.0613.0654.0NANANA765.0NANANA
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312009-09-302009-06-302009-03-31
us-gaap:LiabilitiesNoncurrent ▇▇██▅▄▃▂▂▂▂▁▂▁▁▁▁▁▂▁▂▂▂▂▂▂▃▂▂▂▂▃▃▃▄▃▃▃▃▃▃▃▃50455.051913.054535.055994.043421.035037.028970.027940.027396.027607.028001.023141.023671.021509.020809.021431.021705.022561.023735.023291.023574.023982.024758.025693.026136.027387.028429.024831.024779.025516.026457.031726.032181.032943.033411.031176.031162.031554.032194.029802.030291.030863.030906.0NANANA33747.0NANANA
us-gaap:LongTermDebt ▁▃█27265.027473.027974.0NANANA10106.09025.09296.010389.09368.08881.09514.0NA8440.0NANANA7008.0NANANA7946.0NANANA9379.0NANANA10845.0NANANA12106.0NA12319.012675.013060.013750.013892.014390.014507.0NANANA16665.0NANANA
us-gaap:LongTermDebtNoncurrent ▇▇▇█▅▂▁▁▁▁▁▁▁25246.024802.026531.028910.018539.011750.08052.07072.07209.07435.07959.07801.08258.0NA6295.0NANANA5999.0NANANA6531.0NANANA8270.0NANANA9396.0NANANA10599.0NANANA11233.0NANANA12553.0NANANA15220.0NANANA
us-gaap:LongTermDebtAndCapitalLeaseObligations ▇▇▇█▅▃▂▂▁▁▂▂▂▁▁▁▂▂▁▁▁▁▁▁▁▂▂▂▂▂▂▂▂▂▂▂▂▃▃▃▃▃▃26679.026061.027425.029825.019412.012662.08873.07923.07710.07710.08253.08115.08562.06360.06592.07584.07916.08187.06201.06473.06689.06920.06766.07096.07598.08305.08561.08970.09089.09466.09795.010077.010526.010721.011082.011111.011221.011521.011847.012557.013026.013446.013179.0NANANA15665.0NANANA
us-gaap:PensionAndOtherPostretirementDefinedBenefitPlansLiabilitiesNoncurrent ▁▃▃▂▁▁▁▁▁▂▂▂▂▂▂▂▂▃▆▅▅▅▆▆▆▆▇▄▄▄▅▇▇██▆▆▆▆▄▄▄▄8644.010396.010630.09272.08160.08285.08452.08457.08516.09086.09163.08902.09052.09193.09810.09565.09623.010291.013378.012587.012576.012695.013855.013867.013869.014170.015138.011529.011523.011811.012392.015379.015356.015865.016005.013688.013613.013905.014200.011250.011307.011487.011493.0NANANA11745.0NANANA
us-gaap:OtherLiabilitiesNoncurrent ▇███▆▂▁▁▃▁▁▄▃▃▃▃▂▂▂▂▃▃▂▃▃▃▃▂▂▂▂▂▂▂▂▂▂▂▂▂▁▁▂4715.04792.04862.04997.03930.01666.01386.01378.02025.01395.01132.02517.02365.02320.02111.02001.01885.01822.01878.01956.02015.02091.01891.02465.02322.02457.02128.01946.01735.01712.01711.01709.01680.01694.01649.01711.01606.01489.01419.01424.01383.01386.01533.0NANANA1222.0NANANA
us-gaap:OperatingLeaseLiabilityNoncurrent ▆▅▆█▃▁▂▄▅▇▇5633.05568.05713.05856.05371.05204.05294.05441.05539.05805.05801.0NANANA0.0NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearTwo NANA848.0NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearThree NANA837.0NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearFour NANA770.0NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearFive NANA746.0NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueAfterYearFive NANA4450.0NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312009-09-302009-06-302009-03-31
us-gaap:StockholdersEquity ▂▂▂▃▅███▇▇▇▇▇▇▇▇▇▇▇▇▇▆▆▆▆▅▅▇▇▇▇▂▁▁▁▂▁▁▁▂▂▂▂1281.0482.01534.03357.08690.014309.015358.015068.013958.012911.013687.013704.012856.012557.013910.014001.013479.012945.012287.012510.011810.011252.010850.010345.09563.09046.08813.012296.012203.011641.011643.0137.0-1184.0-1943.0-2131.0-48.0-1135.0-1011.0-1396.01222.0785.0758.0897.0NANANA245.0NANANA
us-gaap:AdditionalPaidInCapitalCommonStock ▄▄▄▄▄▄▄▄▄▄▅▅▅▅▅▅▆▆▆▁▂▃▄▄▅▆▆▇▇██████████████11396.011326.011259.011241.011192.011054.011129.011177.011201.011254.011671.011740.011807.011967.012053.012133.012279.012443.012294.08887.09361.010339.010875.011285.011681.012578.012981.013464.013687.013876.013982.014096.014150.014120.014069.014045.014031.014015.013999.013983.013964.013945.013926.0NANANA13827.0NANANA
us-gaap:RetainedEarningsAccumulatedDeficit ▄▄▄▄▆███▇▇▇▇▇▇▇▇▇▇▇█▇▇▆▆▆▅▅▅▅▅▅▂▂▂▂▂▁▁▁▁▁▁▁-953.0-1605.0-428.0327.05706.011423.012454.011772.010686.09656.010039.09696.08851.08465.09636.09502.08905.08226.07903.011109.010000.08462.07623.06748.05540.04127.03456.04244.03962.03211.03049.0-5379.0-6748.0-7382.0-7389.0-7395.0-8442.0-8274.0-8398.0-8823.0-9372.0-9570.0-9252.0NANANA-9845.0NANANA
us-gaap:AccumulatedOtherComprehensiveIncomeLossNetOfTax ▁▁▁▂▂▂▂▃▃▃▃▃▃▃▃▃▃▃▃▃▃▃▃▃▃▃▃▆▆▆▆▂▂▂▂▄▄▄▄████-8882.0-8960.0-9038.0-7939.0-7937.0-7898.0-7989.0-7645.0-7694.0-7766.0-7825.0-7535.0-7606.0-7681.0-7621.0-7476.0-7549.0-7571.0-7636.0-7212.0-7279.0-7279.0-7275.0-7316.0-7288.0-7294.0-7311.0-5100.0-5137.0-5139.0-5130.0-8324.0-8331.0-8426.0-8577.0-6464.0-6490.0-6518.0-6766.0-3724.0-3593.0-3403.0-3578.0NANANA-3563.0NANANA
us-gaap:TreasuryStockValue ▅▅▄▅▅▅▄▄▄▄▂▂▂▂▁▁▁▁▅▅▅▅████▆▆▆▆▄▄▄▄▄▄▄▄▃▃▃▃▂280.0279.0259.0272.0271.0270.0236.0236.0235.0233.0198.0197.0196.0194.0158.0158.0156.0153.0274.0274.0272.0270.0373.0372.0370.0365.0313.0312.0309.0307.0258.0256.0255.0255.0234.0234.0234.0234.0231.0214.0214.0214.0199.0NANANA174.0NANANA
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312009-09-302009-06-302009-03-31
us-gaap:NetCashProvidedByUsedInOperatingActivities ▆▅▃▁▄▅▅▇█▆▆▆▇▆▆▆▇▃▅▆█▅▆▇▇▆▅▆▇▅▅▅▆▅▅▅▅▅▅▄▅▅▄▅▅▅1866.0691.0-1286.0-2575.0-290.0358.0957.02245.03272.01951.01364.01500.02807.01343.01918.01645.02386.0-801.01125.01854.03215.01011.01479.02067.02745.01636.0582.01358.02056.0951.01131.01161.01208.01004.0550.0463.0632.0831.01158.0-98.0986.0788.0318.0514.01034.0966.0NANANANA
us-gaap:NetCashProvidedByUsedInInvestingActivities ▇▇▆▆▁▃▆▆▅▆▆▆▅▆▅▅▆▅█▆▆▆▅▆▆▆▇▅▇▆▆▆▆▆▆▇▆▇▇▇▇▆▆▆▇▇26.0-60.0-1048.0-1144.0-4075.0-2971.0-767.0-1125.0-1566.0-1105.0-1012.0-909.0-1545.0-927.0-1332.0-1322.0-978.0-1734.0445.0-887.0-1112.0-601.0-1179.0-1009.0-955.0-812.0-38.0-1583.0-279.0-563.0-948.0-617.0-561.0-630.0-533.0-428.0-652.0-349.0-412.0-212.0-298.0-576.0-669.0-802.0-262.0-293.0NANANANA
us-gaap:NetCashProvidedByUsedInFinancingActivities ▃▃▁██▆▄▃▃▃▃▃▄▃▃▃▃▄▃▃▃▃▃▃▃▃▃▃▃▃▃▃▃▄▄▃▃▃▃▃▃▃▃▃▃▃-330.0-790.0-5957.010247.09722.05344.0842.0-1451.0-1662.0-609.0-252.0-1203.0516.0-787.0-250.0-1086.0-1074.01680.0-446.0-991.0-2149.0-674.0-697.0-982.0-1619.0-790.0-966.0-627.0-1114.0-533.0-357.0-491.0-318.0-154.0125.0-300.0-352.0-228.0-396.0-238.0-714.0-223.0-193.0-710.0-1251.0-367.0NANANANA
us-gaap:CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect ▆▅▁█▇▆▅▅▅▅▅▅▆▅▅▅▅▅1562.0-159.0-8291.06528.05357.02731.01032.0-331.044.0237.0100.0-612.01778.0-371.0336.0-788.0337.0-858.0NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312009-09-302009-06-302009-03-31
us-gaap:DepreciationDepletionAndAmortization ▃▂▃▄▅▇▆▆█▆▄▅▅▅▅▄▃▄▂▂▂▂▁▂▁▂▁▁▁▁501.0492.0499.0545.0591.0678.0621.0631.0713.0615.0549.0580.0590.0610.0586.0574.0535.0540.0472.0474.0470.0486.0451.0466.0448.0470.0438.0440.0451.0442.0NANANANANANANANANANANANANANANANANANANANA
us-gaap:NetCashProvidedByUsedInOperatingActivities ▆▅▃▁▄▅▅▇█▆▆▆▇▆▆▆▇▃▅▆█▅▆▇▇▆▅▆▇▅▅▅▆▅▅▅▅▅▅▄▅▅▄▅▅▅1866.0691.0-1286.0-2575.0-290.0358.0957.02245.03272.01951.01364.01500.02807.01343.01918.01645.02386.0-801.01125.01854.03215.01011.01479.02067.02745.01636.0582.01358.02056.0951.01131.01161.01208.01004.0550.0463.0632.0831.01158.0-98.0986.0788.0318.0514.01034.0966.0NANANANA
us-gaap:NetIncomeLoss ▄▃▃▁▁▄▄▅▅▄▄▄▄▄▄▄▄▄▄▄▅▄▄▄▅▄▃▄▄▄█▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▃652.0-1177.0-755.0-5379.0-5717.0-534.01099.01495.01443.0730.01019.01312.01025.0547.0572.01178.01224.0603.0622.01259.01546.0946.0980.01315.01485.0746.0-712.0357.0801.0213.08479.01369.0685.07.07.01047.0-168.0124.0425.0549.0198.0-318.019.0363.0467.0-256.0-25.0-161.0-257.0-794.0
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312009-09-302009-06-302009-03-31
us-gaap:NetCashProvidedByUsedInInvestingActivities ▇▇▆▆▁▃▆▆▅▆▆▆▅▆▅▅▆▅█▆▆▆▅▆▆▆▇▅▇▆▆▆▆▆▆▇▆▇▇▇▇▆▆▆▇▇26.0-60.0-1048.0-1144.0-4075.0-2971.0-767.0-1125.0-1566.0-1105.0-1012.0-909.0-1545.0-927.0-1332.0-1322.0-978.0-1734.0445.0-887.0-1112.0-601.0-1179.0-1009.0-955.0-812.0-38.0-1583.0-279.0-563.0-948.0-617.0-561.0-630.0-533.0-428.0-652.0-349.0-412.0-212.0-298.0-576.0-669.0-802.0-262.0-293.0NANANANA
us-gaap:PaymentsToAcquireProductiveAssets ▄▂▃▁▂▅▆▅█▇▇▅█▆▆▅▅▄▄▄▅▅▅▃▅▃▄▃▃▃▅▃▂▃761.0438.0549.0133.0282.0937.01072.0946.01560.01360.01355.0967.01580.01265.01160.0941.0988.0802.0794.0680.01046.0871.0878.0562.0919.0586.0660.0457.0518.0614.0952.0631.0338.0647.0NANANANANANANANANANANANANANANANA
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312009-09-302009-06-302009-03-31
us-gaap:NetCashProvidedByUsedInFinancingActivities ▃▃▁██▆▄▃▃▃▃▃▄▃▃▃▃▄▃▃▃▃▃▃▃▃▃▃▃▃▃▃▃▄▄▃▃▃▃▃▃▃▃▃▃▃-330.0-790.0-5957.010247.09722.05344.0842.0-1451.0-1662.0-609.0-252.0-1203.0516.0-787.0-250.0-1086.0-1074.01680.0-446.0-991.0-2149.0-674.0-697.0-982.0-1619.0-790.0-966.0-627.0-1114.0-533.0-357.0-491.0-318.0-154.0125.0-300.0-352.0-228.0-396.0-238.0-714.0-223.0-193.0-710.0-1251.0-367.0NANANANA
us-gaap:ProceedsFromIssuanceOfLongTermDebt ▂▂▁█▆▄▂▁▁▁▁▁▃▁▁▁▁▂▁▁▁▁▁▂▁▁▁▁▁▁▁▁▁▁▂▁▁▁▁▂▂▁▂▁▁▁978.0924.0309.010734.07785.03962.01557.00.00.0500.0621.00.03124.00.0450.00.00.02004.00.00.00.0450.00.0997.00.041.040.0707.0214.059.0200.068.00.00.01485.0480.00.00.015.0781.01354.0245.0907.0223.00.00.0NANANANA
 us-gaap:RepaymentsOfLongTermDebt us-gaap:DebtInstrument,us-gaap:LongtermDebtType dal:Certificates,us-gaap:SecuredDebt450.0NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:PaymentsOfDividends NANA0.00.00.0260.0259.0260.0228.0233.0239.0240.0213.0217.0215.0219.0148.0149.0149.0150.0103.0107.0105.0107.072.075.075.075.050.051.051.051.00.00.00.0NANANANANANANANANANANANANANANA
us-gaap:PaymentsForRepurchaseOfCommonStock NANA0.00.00.0344.0225.0209.0268.01325.0325.0325.0600.0325.0327.0550.0600.0200.0300.0500.01026.0775.0425.0425.0925.0425.0500.0250.0225.0125.0157.093.00.00.00.0NANANANANANANANANANANANANANANA
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312009-09-302009-06-302009-03-31
 us-gaap:DebtInstrumentInterestRateStatedPercentage us-gaap:Range,us-gaap:DebtInstrument,us-gaap:LongtermDebtType srt:Maximum,dal:UnsecuredNotes,us-gaap:UnsecuredDebt████▁▁7.38e-067.38e-067.38e-067.38e-067.38e-084.38e-08NA4.38e-084.38e-084.38e-083.63e-083.63e-083.63e-08NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA

Shares Issued

us-gaap:SharesIssued us-gaap:StatementEquityComponents

us-gaap:SharesIssued

us-gaap:CommonStock


Shares
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-312010-12-312009-12-312008-12-312007-12-31
Value650649647647647647652656659664688694699711715745800845869868861848795703299
Percentage of SharesIssued100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:TreasuryStock


Shares
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-312010-12-312009-12-312008-12-312007-12-31
Value10.010.09.010.010.010.09.09.09.09.08.08.08.08.07.014212018161613118.07.0
Percentage of SharesIssued1.51.51.41.51.51.51.41.41.41.41.21.21.11.11.01.92.62.42.11.81.91.51.41.12.3

Weighted Average Number Of Diluted Shares Outstanding

us-gaap:WeightedAverageNumberOfDilutedSharesOutstanding

us-gaap:WeightedAverageNumberOfDilutedSharesOutstanding


Weighted
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-312017-09-302017-06-302017-03-312016-09-302016-06-302016-03-312015-09-302015-06-302015-03-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-312012-09-302012-06-302012-03-312011-09-302011-06-302011-03-312010-09-302010-06-30
Value642636635635637648652667688697706719731731744763780795811826843850853861859855850845847844844837842842
Percentage of WeightedAverageNumberOfDilutedSharesOutstanding100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Weighted Average Number Of Shares Outstanding Basic

us-gaap:WeightedAverageNumberOfSharesOutstandingBasic

us-gaap:WeightedAverageNumberOfSharesOutstandingBasic


Weighted
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-312017-09-302017-06-302017-03-312016-09-302016-06-302016-03-312015-09-302015-06-302015-03-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-312012-09-302012-06-302012-03-312011-09-302011-06-302011-03-312010-09-302010-06-30
Value637636635635637646650665686695704716728728740758774788803818834841844851850848846845843838838837835834
Percentage of WeightedAverageNumberOfSharesOutstandingBasic100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Earnings Per Share Basic

us-gaap:EarningsPerShareBasic

us-gaap:EarningsPerShareBasic


Earnings
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value1.02-1.85-1.19-8.47-9.01-0.841.712.322.221.11.51.911.470.780.811.641.680.830.851.72.041.221.261.671.850.91-0.860.430.950.2510.021.610.810.010.011.24-0.20.150.510.660.24-0.380.020.430.56-0.31
Percentage of EarningsPerShareBasic100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Earnings Per Share Diluted

us-gaap:EarningsPerShareDiluted

us-gaap:EarningsPerShareDiluted


Earnings
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value1.02-1.85-1.19-8.47-9.01-0.841.712.312.211.091.491.911.470.770.81.641.680.820.841.692.031.211.251.651.830.9-0.860.420.940.259.891.590.80.010.011.23-0.20.150.50.650.23-0.380.020.430.55-0.31
Percentage of EarningsPerShareDiluted100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Comprehensive Income Net Of Tax

us-gaap:ComprehensiveIncomeNetOfTax

us-gaap:ComprehensiveIncomeNetOfTax


Comprehensive
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value730-1099.0-1854.0-5381.0-5756.0-443.075415451515789867138311004874271251124666819813261546942102112871491763-2923.0394803204116731376780158-2107.01073-140.0372-2617.04188.0-143.0157500116-195.0
Percentage of ComprehensiveIncomeNetOfTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax10.2-26.50.0-175.7-392.1-5.26.612.312.17.58.111.69.34.94.211.311.67.32.112.614.810.210.711.613.98.1-30.33.57.62.3128.613.18.01.9-24.510.8-1.44.4-31.24.30.1-1.82.05.61.4-2.8

Costs And Expenses

us-gaap:CostsAndExpenses

us-gaap:CostsAndExpenses


Costs
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312011-06-302011-03-312010-06-302010-03-31
Value63105548483194486283900210040104891040894528672783973166780
Percentage of CostsAndExpenses100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax88.5133.70.0308.6428.0104.887.883.583.090.394.7101.289.699.0

Gain Loss On Investments

us-gaap:GainLossOnInvestments

us-gaap:GainLossOnInvestments


Gain
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-30
Value94-95.08.0-112.0136-35.0-82.010018550-238.0180.00.00.0
Percentage of GainLossOnInvestments100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.00.00.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax0.0-3.10.5-1.31.2-0.3-0.71.01.70.4-2.00.20.00.00.0

Gains Losses On Extinguishment Of Debt

us-gaap:GainsLossesOnExtinguishmentOfDebt us-gaap:DebtInstrument, us-gaap:LongtermDebtType

us-gaap:GainsLossesOnExtinguishmentOfDebt

dal:Certificates, us-gaap:SecuredDebt


Gains
Period End2021-06-30
Value-26000000.0
Percentage of GainsLossesOnExtinguishmentOfDebt100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax0.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax dal:Certificates us-gaap:SecuredDebt0.0

dal:TermLoan2020, us-gaap:SecuredDebt


Gains
Period End2021-03-31
Value-56000000.0
Percentage of GainsLossesOnExtinguishmentOfDebt0.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax-1.3
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax dal:TermLoan2020 us-gaap:SecuredDebt0.0

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

us-gaap:IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest

us-gaap:IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest


Income
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-30
Value776-1515.0-1108.0-6859.0-7014.0-607.01398194719079461387167413727181090180518919159521900235014341533207223661186-1140.0579129833547513636863.0111052-164.0127417547195-389.020366
Percentage of IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax10.9-36.50.0-224.0-477.8-7.112.215.515.29.012.914.011.77.210.616.317.610.010.118.122.515.516.118.722.112.6-11.85.212.23.85.213.07.10.00.110.6-1.71.55.05.62.1-5.00.34.1

Income Tax Expense Benefit

us-gaap:IncomeTaxExpenseBenefit

us-gaap:IncomeTaxExpenseBenefit


Income
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value124-338.0-353.0-1480.0-1297.0-73.0300452464216336362347171518627667312330641804488553757881440-428.0222497122-8004.0-6.01.0-4.05.05.04.03.0-8.0-2.0-3.0-71.01.03.01.010.0
Percentage of IncomeTaxExpenseBenefit100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax1.7-8.10.0-48.3-88.4-0.82.63.63.72.13.13.02.91.75.15.76.23.43.56.17.75.35.86.88.24.7-4.42.04.71.4-88.2-0.10.0-0.00.10.10.00.0-0.1-0.0-0.0-0.90.00.00.00.1

Interest Income Expense Net

us-gaap:InterestIncomeExpenseNet

us-gaap:InterestIncomeExpenseNet


Interest
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-30
Value-338.0-361.0-365.0-291.0-194.0-79.0-73.0-70.0-75.0-83.0-37.0-84.0-89.0-102.0-99.0-100.0-103.0-94.0-93.0-95.0-93.0-107.0-102.0-121.0-127.0-131.0-190.0-140.0-155.0-165.0-172.0-176.0-172.0-178.0-189.0-195.0-207.0-221.0-218.0-229.0-233.0-221.0-219.0-249.0
Percentage of InterestIncomeExpenseNet100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax-4.7-8.70.0-9.5-13.2-0.9-0.6-0.6-0.6-0.8-0.3-0.7-0.8-1.0-1.0-0.9-1.0-1.0-1.0-0.9-0.9-1.2-1.1-1.1-1.2-1.4-2.0-1.3-1.5-1.9-1.9-1.7-1.8-2.1-2.2-2.0-2.1-2.6-2.6-2.3-2.5-2.9-2.8-2.8

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

us-gaap:OperatingSegments, dal:Airline


Interest
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-30
Value-337.0-360.0-364.0-288.0-196.0-80.0-80.0-70.0-84.0-92.0-37.0-94.0-97.0-97.0-106.0-100.0-103.0
Percentage of InterestIncomeExpenseNet99.799.799.799.0101.0101.3109.6100.0112.0110.8100.0111.9109.095.1107.1100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax-4.7-8.70.0-9.4-13.4-0.9-0.7-0.6-0.7-0.9-0.3-0.8-0.8-1.0-1.0-0.9-1.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:OperatingSegments dal:Airline-5.3-10.00.0-10.9-16.7-0.90.0-0.6-0.7-0.90.0-0.8-0.8-1.00.0-0.9-1.0

us-gaap:OperatingSegments, dal:Refinery


Interest
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-30
Value-1.0-1.0-3.02.01.07.00.09.09.00.010.08.05.07.00.00.0
Percentage of InterestIncomeExpenseNet0.30.31.0-1.0-1.3-9.6-0.0-12.0-10.8-0.0-11.9-9.0-4.9-7.1-0.0-0.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax-0.0-0.0-0.10.10.00.10.00.10.10.00.10.10.10.10.00.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:OperatingSegments dal:Refinery-0.1-0.1-0.40.40.10.00.00.60.70.00.60.50.30.00.00.0

Net Income Loss

us-gaap:NetIncomeLoss

us-gaap:NetIncomeLoss


Net
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312009-09-302009-06-302009-03-31
Value652-1177.0-755.0-5379.0-5717.0-534.0109914951443730101913121025547572117812246036221259154694698013151485746-712.0357801213847913696857.07.01047-168.0124425549198-318.019363467-256.0-25.0-161.0-257.0-794.0
Percentage of NetIncomeLoss100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax9.1-28.40.0-175.7-389.4-6.29.611.911.57.09.511.08.75.55.610.711.46.66.612.014.810.210.311.813.97.9-7.43.27.52.493.413.17.10.10.110.6-1.71.55.15.62.2-4.10.24.15.7-3.7-0.4-2.1-3.7-11.9

us-gaap:NetIncomeLoss us-gaap:StatementEquityComponents

us-gaap:RetainedEarnings


Net
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-31
Value652-1177.0-5379.0-5717.0-534.01495144373013221036557
Percentage of NetIncomeLoss100.0100.0100.0100.0100.0100.0100.0100.0100.8101.1101.8
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax9.1-28.4-175.7-389.4-6.211.911.57.011.18.85.6
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:RetainedEarnings0.00.00.00.00.00.00.00.00.00.00.0

Nonoperating Income Expense

us-gaap:NonoperatingIncomeExpense

us-gaap:NonoperatingIncomeExpense


Nonoperating
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value-40.0-117.0-250.0-473.0-2199.0-197.0-1.0-124.0-221.0-74.028432-308.0-122.0-104.0-34.0-137.0-138.0-68.0-69.0-73.0-106.0-184.0-141.0-108.0-212.0-312.0-256.0-281.0-285.0-226.0-200.0-228.0-219.0-340.0-256.0-298.0-255.0-309.0-313.0-286.0-297.0-274.0-637.0-384.0-314.0
Percentage of NonoperatingIncomeExpense100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax-0.6-2.80.0-15.4-149.8-2.3-0.0-1.0-1.8-0.72.60.3-2.6-1.2-1.0-0.3-1.3-1.5-0.7-0.7-0.7-1.1-1.9-1.3-1.0-2.3-3.2-2.3-2.6-3.2-2.5-1.9-2.3-2.6-4.0-2.6-3.1-3.0-3.7-3.2-3.1-3.8-3.5-7.1-4.7-4.6

Operating Income Loss

us-gaap:OperatingIncomeLoss

us-gaap:OperatingIncomeLoss


Operating
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312009-09-302009-06-302009-03-31
Value816-1398.0-858.0-6386.0-4815.0-410.01399207121281020109016421680840119318392028105310201969242315401717221324741398-828.0835157962070115639142223521308134382726860481-92.0294100385268-46.02041.0-483.0
Percentage of OperatingIncomeLoss100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax11.5-33.70.0-208.6-328.0-4.812.216.517.09.710.113.714.38.411.616.618.911.510.818.823.216.618.119.923.114.9-8.67.514.97.07.714.99.42.64.113.21.44.58.68.85.3-1.23.811.210.41.0-0.72.70.0-7.2

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

us-gaap:OperatingSegments, dal:Airline


Operating
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-31
Value973-1273.0-755.0-6358.0-4701.0-439.01375202220911054114616301635796117018022022100910622014243315681709210723841312
Percentage of OperatingIncomeLoss119.291.188.099.697.6107.198.397.698.3103.3105.199.397.394.898.198.099.795.8104.1102.3100.4101.899.595.296.493.8
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax13.7-30.70.0-207.6-320.2-5.112.016.116.710.110.713.613.98.011.416.318.811.011.219.223.316.918.019.022.314.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:OperatingSegments dal:Airline15.3-35.30.0-240.4-399.7-5.10.016.116.710.10.013.814.18.20.016.518.911.10.019.223.417.10.019.222.514.1

us-gaap:OperatingSegments, dal:Refinery


Operating
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-31
Value-157.0-125.0-103.0-28.0-114.029244937-34.0-43.012454423376.044-42.0-45.0-10.0-28.08.01069086
Percentage of OperatingIncomeLoss-19.28.912.00.42.4-7.11.72.41.7-3.3-3.90.72.75.21.92.00.34.2-4.1-2.3-0.4-1.80.54.83.66.2
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax-2.2-3.00.0-0.9-7.80.30.20.40.3-0.3-0.40.10.40.40.20.30.10.5-0.4-0.4-0.1-0.30.11.00.80.9
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:OperatingSegments dal:Refinery-10.9-11.90.0-4.2-22.22.40.03.32.5-2.70.00.72.73.00.02.70.53.90.0-4.6-1.0-3.70.08.46.67.5

Other Comprehensive Income Loss Net Of Tax

us-gaap:OtherComprehensiveIncomeLossNetOfTax

us-gaap:OtherComprehensiveIncomeLossNetOfTax


Other
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-31
Value7878-2.0-39.091497259717546
Percentage of OtherComprehensiveIncomeLossNetOfTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax1.11.9-0.1-2.71.10.40.60.60.60.60.5

us-gaap:OtherComprehensiveIncomeLossNetOfTax us-gaap:StatementEquityComponents

us-gaap:AccumulatedOtherComprehensiveIncome


Other
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-31
Value7878-2.0-39.091497259717546
Percentage of OtherComprehensiveIncomeLossNetOfTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax1.11.9-0.1-2.71.10.40.60.60.60.60.5
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:AccumulatedOtherComprehensiveIncome0.00.00.00.00.00.00.00.00.00.00.0

Other Nonoperating Income Expense

us-gaap:OtherNonoperatingIncomeExpense

us-gaap:OtherNonoperatingIncomeExpense


Other
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value8736212745-6.0-64.0-19.0-64.0-91.01366619-38.0-5.066-34.0-44.02526201.0-82.0-20.019-81.0-170.0323.0-81.0-20.013-15.01.00.0-1.0-42.017-9.0-31.06.0-9.02225-72.0-8.0
Percentage of OtherNonoperatingIncomeExpense100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax1.20.90.00.93.1-0.1-0.6-0.2-0.5-0.91.30.60.2-0.4-0.00.6-0.3-0.50.30.20.20.0-0.9-0.20.2-0.9-1.80.30.0-0.9-0.20.1-0.20.00.0-0.0-0.40.2-0.1-0.30.1-0.10.30.3-0.9-0.1

Revenue From Contract With Customer Excluding Assessed Tax

us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax

us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax


Revenue
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312009-09-302009-06-302009-03-31
Value7126415039733062146885921143912560125361047210742119531177599681024511061107479148945810483104479251950211107107079388964711178106218916907610490970785008602992397328413839998169153774777898950816868486805757470006684
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:AirlineDestinations

us-gaap:AtlanticDestination


Revenue
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value46726729624011999415752336213613161548224419971253
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax6.66.47.57.88.111.613.818.617.012.614.418.817.012.6
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax6.66.47.57.88.111.613.818.617.012.614.418.817.012.6
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:AtlanticDestination100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DomesticDestination


Revenue
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value58943368322325851264626783598651878774877753812582447111
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax82.781.281.184.486.172.973.168.970.171.572.268.070.071.3
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax82.781.281.184.486.172.973.168.970.171.572.268.070.071.3
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:DomesticDestination100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:LatinAmericaDestination


Revenue
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value58638130612626863784757838964732741791917
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax8.29.27.74.11.810.06.96.06.79.26.86.26.79.2
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax8.29.27.74.11.810.06.96.06.79.26.86.26.79.2
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:LatinAmericaDestination100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:PacificDestination


Revenue
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value17913414811159468721816775705709843743687
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax2.53.23.73.64.05.46.36.56.26.76.67.16.36.9
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax2.53.23.73.64.05.46.36.56.26.76.67.16.36.9
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:PacificDestination100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

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

us-gaap:IntersegmentElimination, dal:ExchangedProducts


Revenue
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-30
Value-536.0-503.0-400.0-249.0-65.0-831.0-1000.0-1100.0-1100.0-732.0-500.0-1100.0-1100.0-876.0-800.0-910.0-756.0-733.0-700.0-734.0-745.0-526.0-700.0-761.0-858.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax-7.5-12.1-10.1-8.1-4.4-9.7-8.7-8.8-8.8-7.0-4.7-9.2-9.3-8.8-7.8-8.2-7.0-8.0-7.4-7.0-7.1-5.7-7.4-6.9-8.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax-7.5-12.1-10.1-8.1-4.4-9.7-8.7-8.8-8.8-7.0-4.7-9.2-9.3-8.8-7.8-8.2-7.0-8.0-7.4-7.0-7.1-5.7-7.4-6.9-8.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:IntersegmentElimination dal:ExchangedProducts100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:IntersegmentElimination, dal:Salesofrefinedproductstothirdparties


Revenue
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-31
Value-13.0-4.0-8.0-3.0-153.0-143.0-35.0-52.0-76.0-232.0-69.0-63.0-80.0-140.0-65.0-79.0-123.0-144.0-132.0-54.0-55.0-16.0597-117.0-92.0-51.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax-0.2-0.1-0.2-0.1-10.4-1.7-0.3-0.4-0.6-2.2-0.6-0.5-0.7-1.4-0.6-0.7-1.1-1.6-1.4-0.5-0.5-0.26.3-1.1-0.9-0.5
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax-0.2-0.1-0.2-0.1-10.4-1.7-0.3-0.4-0.6-2.2-0.6-0.5-0.7-1.4-0.6-0.7-1.1-1.6-1.4-0.5-0.5-0.26.3-1.1-0.9-0.5
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:IntersegmentElimination dal:Salesofrefinedproductstothirdparties100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:IntersegmentElimination, dal:Salestoairlinesegment


Revenue
Period End2021-06-302020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-31
Value-108.00.00.0-3.0-210.0-221.0-304.0-307.0-271.0-96.0-328.0-275.0-262.0-264.0-239.0-193.0-190.0-200.0-173.0-178.0-144.01782-267.0-292.0-233.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax-1.50.00.0-0.2-2.4-1.9-2.4-2.4-2.6-0.9-2.7-2.3-2.6-2.6-2.2-1.8-2.1-2.1-1.7-1.7-1.618.8-2.4-2.7-2.5
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax-1.50.00.0-0.2-2.4-1.9-2.4-2.4-2.6-0.9-2.7-2.3-2.6-2.6-2.2-1.8-2.1-2.1-1.7-1.7-1.618.8-2.4-2.7-2.5
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:IntersegmentElimination dal:Salestoairlinesegment100.00.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

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

us-gaap:OperatingSegments, dal:Airline


Revenue
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-31
Value634936103532264511768592114361255412496104241073111845115599755998310932106809087917410473103989172949810994105929314
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax89.187.088.986.480.1100.0100.0100.099.799.599.999.198.297.997.498.899.499.397.099.999.599.1100.099.098.999.2
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax89.187.088.986.480.1100.0100.0100.099.799.599.999.198.297.997.498.899.499.397.099.999.599.1100.099.098.999.2
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:OperatingSegments dal:Airline100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OperatingSegments, dal:Refinery


Revenue
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-31
Value1434104777766951311841269150515011283691160916671491141513571139112810809711027765986125813571140
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax20.125.219.621.834.913.811.112.012.012.36.413.514.215.013.812.310.612.311.49.39.88.310.411.312.712.1
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax20.125.219.621.834.913.811.112.012.012.36.413.514.215.013.812.310.612.311.49.39.88.310.411.312.712.1
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:OperatingSegments dal:Refinery100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:ProductOrService

dal:PassengerAirTraffic


Revenue
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-30
Value45532277225816345686511892210029996979888436955393087653794488128606
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax63.954.956.853.438.775.878.079.879.576.378.579.979.076.877.579.780.1
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax63.954.956.853.438.775.878.079.879.576.378.579.979.076.877.579.780.1
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax dal:PassengerAirTraffic100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

dal:PassengerLoyaltyTravelAwards


Revenue
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-30
Value42824120414345543726732751692675678680618577622622
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax6.05.85.14.73.16.36.35.86.06.66.35.75.86.25.65.65.8
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax6.05.85.14.73.16.36.35.86.06.66.35.75.86.25.65.65.8
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax dal:PassengerLoyaltyTravelAwards100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

dal:PassengerTravelRelatedServices


Revenue
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-30
Value35823023616165515597649648574537565558494501545540
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax5.05.55.95.34.46.05.25.25.25.55.04.74.75.04.94.95.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax5.05.55.95.34.46.05.25.25.25.55.04.74.75.04.94.95.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax dal:PassengerTravelRelatedServices100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

dal:ProductAndServiceOtherAncillaryBusinessesAndRefinery


Revenue
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-30
Value962726613572390223307291330369326433522521541419320
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax13.517.515.418.726.62.62.72.32.63.53.03.64.45.25.33.83.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax13.517.515.418.726.62.62.72.32.63.53.03.64.45.25.33.83.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax dal:ProductAndServiceOtherAncillaryBusinessesAndRefinery100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

dal:ProductAndServiceOtherLoyaltyProgram


Revenue
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-30
Value439368372343269474519485484474384369358347330317316
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax6.28.99.411.218.35.54.53.93.94.53.63.13.03.53.22.92.9
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax6.28.99.411.218.35.54.53.93.94.53.63.13.03.53.22.92.9
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax dal:ProductAndServiceOtherLoyaltyProgram100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

dal:ProductAndServiceOtherMiscellaneous


Revenue
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-30
Value13593856723174182185168183170129126133133155156
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax1.92.22.12.21.62.01.61.51.31.71.61.11.11.31.31.41.5
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax1.92.22.12.21.62.01.61.51.31.71.61.11.11.31.31.41.5
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax dal:ProductAndServiceOtherMiscellaneous100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:CargoAndFreight


Revenue
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-30
Value251215205142108152186189186192214226223202202191187
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax3.55.25.24.67.41.81.61.51.51.82.01.91.92.02.01.71.7
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax3.55.25.24.67.41.81.61.51.51.82.01.91.92.02.01.71.7
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:CargoAndFreight100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:Passenger


Revenue
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-30
Value533927482698193867875691024511410113689254964810796105468765902299799768
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax74.966.267.963.346.288.189.690.890.788.489.890.389.687.988.190.290.9
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax74.966.267.963.346.288.189.690.890.788.489.890.389.687.988.190.290.9
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:Passenger100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ProductAndServiceOther


Revenue
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-30
Value15361187107098268287110089619821026880931100610011004891792
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax21.628.626.932.146.510.18.87.77.89.88.27.88.510.09.88.17.4
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax21.628.626.932.146.510.18.87.77.89.88.27.88.510.09.88.17.4
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:ProductAndServiceOther100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

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

us-gaap:Passenger, us-gaap:AtlanticDestination


Revenue
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-30
Value2881421571326481813392060188011031328199617821070124018021566
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax4.03.44.04.34.49.511.716.415.010.512.416.715.110.712.116.314.6
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax4.03.44.04.34.49.511.716.415.010.512.416.715.110.712.116.314.6
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:Passenger us-gaap:AtlanticDestination100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:Passenger, us-gaap:DomesticDestination


Revenue
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-30
Value4478228022291647564560176127971807167137066739574136282655867756888
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax62.854.956.153.838.465.266.563.564.464.165.861.963.063.064.061.364.1
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax62.854.956.153.838.465.266.563.564.464.165.861.963.063.064.061.364.1
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:Passenger us-gaap:DomesticDestination100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:Passenger, us-gaap:LatinAmericaDestination


Revenue
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-30
Value4852642349718765704683760855660675709830636693714
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax6.86.45.93.21.28.96.25.46.18.26.15.66.08.36.26.36.6
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax6.86.45.93.21.28.96.25.46.18.26.15.66.08.36.26.36.6
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:Passenger us-gaap:LatinAmericaDestination100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:Passenger, us-gaap:PacificDestination


Revenue
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-30
Value8862786232385590696657583594730642583588709600
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax1.21.52.02.02.24.55.25.55.25.65.56.15.55.85.76.45.6
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax1.21.52.02.02.24.55.25.55.25.65.56.15.55.85.76.45.6
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:Passenger us-gaap:PacificDestination100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Revenues

us-gaap:Revenues

us-gaap:Revenues


Revenues
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312009-09-302009-06-302009-03-31
Value7126415039733062146885921143912560125361047210742119531177599681024511060107919148945810483104479251950211107107079388964711178106218916907610490970785008602992397328413839998169153774777898950816868486805757470006684
Percentage of Revenues100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.4100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Selling And Marketing Expense

us-gaap:SellingAndMarketingExpense

us-gaap:SellingAndMarketingExpense


Selling
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value222110849445358488539538427468535511427443482458404419466437388402463421386411476440373391447408357377440393380393480440369364404377364
Percentage of SellingAndMarketingExpense100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax3.12.72.13.13.14.24.34.34.34.14.44.54.34.34.34.44.34.44.44.44.24.24.24.23.94.14.34.34.14.24.34.34.24.24.44.44.04.54.74.94.84.84.74.54.65.3

Assets

us-gaap:Assets

us-gaap:Assets


Assets
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312009-12-31
Value7530973083719967907672261687386453263219625186184160266550035579654078532925192851815514595126150948516345334253134536465278153752541215194052191521675225245997457724506844550443524472044189434994303643878438814318843789
Percentage of Assets100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

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

us-gaap:OperatingSegments, dal:Airline


Assetsus-gaap:
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312013-12-31
Value73484715057054877558707076686462793615156068560343585615310353335521165116549992503285013949930497485021352093517855228751508525875289650932
Percentage of Assets97.697.898.098.197.897.397.397.397.197.697.296.595.696.496.096.397.197.497.497.697.297.797.597.597.697.897.797.5
Percentage of Assets97.697.898.098.197.897.397.397.397.197.697.296.595.696.496.096.397.197.497.497.697.297.797.597.597.697.897.797.5
Percentage of Assets us-gaap:OperatingSegments dal:Airline100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OperatingSegments, dal:Refinery


Assetsus-gaap:
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312013-12-31
Value1825157814481518155418741739170418331498170519002461196221271936148713201331120014211249134912581173105611091172
Percentage of Assets2.42.22.01.92.22.72.72.72.92.42.83.54.43.64.03.72.92.62.62.42.82.32.52.32.22.02.02.2
Percentage of Assets2.42.22.01.92.22.72.72.72.92.42.83.54.43.64.03.72.92.62.62.42.82.32.52.32.22.02.02.2
Percentage of Assets us-gaap:OperatingSegments dal:Refinery100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Liabilities And Stockholders Equity

us-gaap:LiabilitiesAndStockholdersEquity

us-gaap:LiabilitiesAndStockholdersEquity


Liabilities
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312009-12-31
Value7530973083719967907672261687386453263219625186184160266550035579654078532925192851815514595126150948516345334253134536465278153752541215194052191521675225245997457724506844550443524472044189434994303643878438814318843789
Percentage of LiabilitiesAndStockholdersEquity100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Stockholders Equity

us-gaap:StockholdersEquity

us-gaap:StockholdersEquity


Stockholders
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312009-12-312008-12-312007-12-31
Value12814821534335786901430915358150681395812911136871370412856125571391014001134791294512287125101181011252108501034595639046881312296122031164111643137-1184.0-1943.0-2131.0-48.0-1135.0-1011.0-1396.0122278575889724587410113
Percentage of StockholdersEquity100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets1.70.72.14.212.020.823.823.822.320.922.724.923.023.226.127.026.025.224.024.622.921.120.419.318.116.816.323.723.422.322.30.3-2.6-4.3-4.8-0.1-2.5-2.3-3.22.81.81.72.10.60.00.0

us-gaap:StockholdersEquity us-gaap:StatementEquityComponents

dal:AOCIOther


Stockholders
Period End2021-06-302021-03-312020-12-312020-06-302020-03-312019-12-312018-12-312017-12-31
Value4040403112710610085
Percentage of StockholdersEquity3.18.32.60.40.90.70.70.6
Percentage of Assets0.10.10.10.00.20.20.20.2
Percentage of Assets dal:AOCIOther0.00.00.00.00.00.00.00.0

dal:AccumulatedNetGainLossAndAdjustmentOther


Stockholders
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-31
Value403112710610310199100
Percentage of StockholdersEquity1.20.40.90.70.70.70.80.7
Percentage of Assets0.10.00.20.20.20.20.20.2
Percentage of Assets dal:AccumulatedNetGainLossAndAdjustmentOther0.00.00.00.00.00.00.00.0

us-gaap:AccumulatedDefinedBenefitPlansAdjustment


Stockholders
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302014-12-312013-12-31
Value-8922.0-9000.0-9078.0-7979.0-7968.0-8025.0-8095.0-7748.0-7795.0-7865.0-7925.0-7635.0-7701.0-7761.0-7812.0-7592.0-7631.0-7673.0-7714.0-7243.0-7282.0-7318.0-7354.0-7403.0-7442.0-7517.0-5323.0
Percentage of StockholdersEquity-696.5-1867.2-591.8-237.7-91.7-56.1-52.7-51.4-55.8-60.9-57.9-55.7-59.9-61.8-56.2-54.2-56.6-59.3-62.8-57.9-61.7-65.0-67.8-71.6-77.8-85.3-45.7
Percentage of Assets-11.8-12.3-12.6-10.1-11.0-11.7-12.5-12.3-12.5-12.7-13.2-13.9-13.8-14.4-14.7-14.6-14.7-14.9-15.0-14.2-14.1-13.7-13.8-13.8-14.1-13.9-10.2
Percentage of Assets us-gaap:AccumulatedDefinedBenefitPlansAdjustment0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:AccumulatedOtherComprehensiveIncome


Stockholders
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302014-12-312013-12-312012-12-312011-12-312010-12-312009-12-312008-12-312007-12-31
Value-8882.0-8960.0-9038.0-7939.0-7937.0-7898.0-7989.0-7645.0-7694.0-7766.0-7825.0-7535.0-7606.0-7681.0-7621.0-7476.0-7549.0-7571.0-7636.0-7212.0-7279.0-7279.0-7275.0-7316.0-7288.0-7311.0-5130.0-8577.0-6766.0-3578.0-3563.0-4080.0435
Percentage of StockholdersEquity-693.4-1858.9-589.2-236.5-91.3-55.2-52.0-50.7-55.1-60.2-57.2-55.0-59.2-61.2-54.8-53.4-56.0-58.5-62.1-57.6-61.6-64.7-67.1-70.7-76.2-83.0-44.1402.5484.7-398.9-1454.3-466.84.3
Percentage of Assets-11.8-12.3-12.6-10.0-11.0-11.5-12.4-12.1-12.3-12.6-13.0-13.7-13.6-14.2-14.3-14.4-14.6-14.7-14.9-14.2-14.1-13.6-13.7-13.6-13.8-13.5-9.8-19.3-15.6-8.3-8.10.00.0
Percentage of Assets us-gaap:AccumulatedOtherComprehensiveIncome0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:AdditionalPaidInCapital


Stockholders
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-312010-12-312009-12-312008-12-312007-12-31
Value1139611326112591124111192110541112911177112011125411671117401180711967120531229410875129811398214069139991392613827137149512
Percentage of StockholdersEquity889.62349.8734.0334.9128.877.372.574.280.287.285.385.791.895.386.6100.1100.2147.3120.1-660.2-1002.81552.55643.71569.194.1
Percentage of Assets15.115.515.614.215.516.117.217.717.918.219.421.321.222.122.624.020.524.026.831.632.232.231.60.00.0
Percentage of Assets us-gaap:AdditionalPaidInCapital0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:RetainedEarnings


Stockholders
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-312010-12-312009-12-312008-12-312007-12-31
Value-953.0-1605.0-428.032757061142312454117721068696561003994838629823096367903762334563049-7389.0-8398.0-9252.0-9845.0-8608.0314
Percentage of StockholdersEquity-74.4-333.0-27.99.765.779.881.178.176.674.873.369.267.165.569.364.370.339.226.2346.7601.6-1031.4-4018.4-984.93.1
Percentage of Assets-1.3-2.2-0.60.47.916.619.318.617.115.616.717.215.515.218.115.414.36.45.8-16.6-19.3-21.4-22.50.00.0
Percentage of Assets us-gaap:RetainedEarnings0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:TreasuryStock


Stockholders
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-312010-12-312009-12-312008-12-312007-12-31
Value-280.0-279.0-259.0-272.0-271.0-270.0-236.0-236.0-235.0-233.0-198.0-197.0-196.0-194.0-158.0-274.0-373.0-313.0-258.0-234.0-231.0-199.0-174.0-152.0-148.0
Percentage of StockholdersEquity-21.9-57.9-16.9-8.1-3.1-1.9-1.5-1.6-1.7-1.8-1.4-1.4-1.5-1.5-1.1-2.2-3.4-3.6-2.211.016.5-22.2-71.0-17.4-1.5
Percentage of Assets-0.4-0.4-0.4-0.3-0.4-0.4-0.4-0.4-0.4-0.4-0.3-0.4-0.4-0.4-0.3-0.5-0.7-0.6-0.5-0.5-0.5-0.5-0.40.00.0
Percentage of Assets us-gaap:TreasuryStock0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

Assets Current

us-gaap:AssetsCurrent

us-gaap:AssetsCurrent


Assets
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312009-12-31
Value19666178531740425030189151027582496944713471966340672676417724784470837177688074517329763893069056119731144112266124651099510517974696518951889586418272816384578299772973298063799373077991
Percentage of AssetsCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets26.124.424.231.726.214.912.811.011.411.610.512.213.714.314.713.613.913.414.514.414.817.417.022.321.722.823.021.220.218.718.519.519.419.218.618.418.918.817.817.018.418.216.918.2

Cash And Cash Equivalents At Carrying Value

us-gaap:CashAndCashEquivalentsAtCarryingValue

us-gaap:CashAndCashEquivalentsAtCarryingValue


Cash
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312008-12-312007-12-31
Value1035784608307164771136659672882189920091910156513801886144718141478224119072762163816621708197223692293212220882510336226992844301829652636241622742539291126572307285528812892343644344913460742552648
Percentage of CashAndCashEquivalentsAtCarryingValue100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets13.811.611.520.815.78.74.53.03.23.12.62.53.42.73.42.84.33.75.43.23.23.23.74.44.33.93.94.86.45.25.46.66.55.85.45.15.76.66.15.46.56.66.70.00.00.010.50.00.0

Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents

us-gaap:CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents

us-gaap:CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents


Cash
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312015-12-31
Value114589896100551834611818646137302698302929852748264832601482185315172305196828262026
Percentage of CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets15.213.514.023.216.49.45.84.34.84.84.64.85.82.73.52.94.43.85.53.8

Short Term Investments

us-gaap:ShortTermInvestments

us-gaap:ShortTermInvestments


Short
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302019-12-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312009-12-31
Value487355755789504843020.020347852052382596074774348715141289120614651442149414471217185271995995995995895895895995995995895896795871871
Percentage of ShortTermInvestments100.0100.0100.0100.0100.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets6.57.68.06.46.00.00.30.90.91.01.51.81.41.41.03.02.52.32.82.72.82.72.23.61.41.81.82.12.12.12.22.22.12.22.22.22.22.21.70.2

Receivables Net Current

us-gaap:ReceivablesNetCurrent

us-gaap:ReceivablesNetCurrent


Receivables
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312009-12-31
Value22581837139615031375228028542836284431542314251724272568237723992164230720641996210221792020197419662057229721352104204216091969208419941693178518281807156318161885184814561353
Percentage of ReceivablesNetCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets3.02.51.91.91.93.34.44.54.55.13.84.64.34.74.54.64.24.54.03.94.14.13.83.73.73.84.24.14.03.93.14.34.64.43.84.04.14.13.64.24.34.23.43.1

Prepaid Expense And Other Assets Current

us-gaap:PrepaidExpenseAndOtherAssetsCurrent

us-gaap:PrepaidExpenseAndOtherAssetsCurrent


Prepaid
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302010-12-31
Value1173115311801256102510541262113711981061120311811219204014991110108710688549101017887796816815790733122012211209131813551302130413441876188214751418106711791159
Percentage of PrepaidExpenseAndOtherAssetsCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets1.61.61.61.61.41.52.01.81.91.72.02.12.23.82.82.12.12.11.71.82.01.71.51.51.51.51.42.32.32.32.52.92.82.93.04.24.23.33.32.52.72.7

Assets Noncurrent

us-gaap:AssetsNoncurrent

us-gaap:AssetsNoncurrent


Assets
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312017-12-31
Value556435523054592540465334658463562835627555384546455392645867
Percentage of AssetsNoncurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets73.975.675.868.373.885.187.289.088.688.489.586.1

Property Plant And Equipment Net

us-gaap:PropertyPlantAndEquipmentNet

us-gaap:PropertyPlantAndEquipmentNet


Property
Period End2020-09-302019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312009-12-31
Value2660030796301652913928335285652812427096265632590025367248172437524105239752342223039226082248022023219292172222048219722185421297210492079320713205992060920332202232025620315203332030720433
Percentage of PropertyPlantAndEquipmentNet100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets33.648.748.347.147.051.950.450.149.849.949.048.247.647.346.443.943.442.142.641.040.541.842.242.141.846.346.046.146.546.446.146.046.547.146.346.347.046.7

Goodwill

us-gaap:Goodwill

us-gaap:Goodwill


Goodwill
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312009-12-312008-12-31
Value975397539753975397539753978197819781978197819794979497949794979497949794979497949794979497949794979497949794979497949794979497949794979497949794979497949794979497949794979497879731
Percentage of Goodwill100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets13.013.313.512.313.514.215.215.515.615.816.217.817.618.118.418.918.919.019.119.219.018.418.418.318.618.218.118.918.818.818.721.321.421.722.022.121.922.222.522.822.322.322.722.40.0

Indefinite Lived Intangible Assets Excluding Goodwill

us-gaap:IndefiniteLivedIntangibleAssetsExcludingGoodwill us-gaap:IndefiniteLivedIntangibleAssetsByMajorClass

us-gaap:IndefiniteLivedIntangibleAssetsExcludingGoodwill

dal:AirlineAlliances


Indefinite
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312018-12-31
Value18631863186318631005661
Percentage of IndefiniteLivedIntangibleAssetsExcludingGoodwill100.0100.0100.0100.0100.0100.0
Percentage of Assets2.62.42.62.71.61.1
Percentage of Assets dal:AirlineAlliances0.00.00.00.00.00.0

dal:DomesticSlots


Indefinite
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-312010-12-31
Value622622622622622622622622622622622622624502
Percentage of IndefiniteLivedIntangibleAssetsExcludingGoodwill33.433.433.433.461.994.10.00.00.00.00.00.00.00.0
Percentage of Assets0.90.80.90.91.01.01.21.21.21.11.21.41.41.2
Percentage of Assets dal:DomesticSlots0.00.00.00.00.00.00.00.00.00.00.00.00.00.0

dal:InternationalRoutesAndSlots


Indefinite
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-312010-12-312009-12-31
Value258325832583258325832583258325632563228722872240224022902290
Percentage of IndefiniteLivedIntangibleAssetsExcludingGoodwill138.6138.6138.6138.6257.0390.80.00.00.00.00.00.00.00.00.0
Percentage of Assets3.63.33.63.84.04.34.85.04.84.24.45.05.15.35.2
Percentage of Assets dal:InternationalRoutesAndSlots0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:IndefiniteLivedIntangibleAssetsExcludingGoodwill us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName, us-gaap:IndefiniteLivedIntangibleAssetsByMajorClass

dal:LATAMAirlinesGroupSA, dal:AirlineAlliances


Indefinite
Period End2020-12-31
Value1200
Percentage of IndefiniteLivedIntangibleAssetsExcludingGoodwill64.4
Percentage of Assets1.7
Percentage of Assets dal:LATAMAirlinesGroupSA dal:AirlineAlliances0.0

Intangible Assets Net Excluding Goodwill

us-gaap:IntangibleAssetsNetExcludingGoodwill

us-gaap:IntangibleAssetsNetExcludingGoodwill


Intangible
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302010-12-31
Value60066009601160146017601951634821482448274830483548394843484748514855485548444848485248564861458945944599460346144625464246584675469247094679469747164733475146974749
Percentage of IntangibleAssetsNetExcludingGoodwill100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets8.08.28.37.68.38.88.07.67.77.88.08.88.79.09.19.39.49.49.49.59.49.19.18.68.78.68.58.98.98.98.910.210.310.410.510.610.510.710.910.911.0

Deferred Tax Assets Liabilities Net

us-gaap:DeferredTaxAssetsLiabilitiesNet

us-gaap:DeferredTaxAssetsLiabilitiesNet


Deferred
Period End2020-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-312010-12-312009-12-31
Value1988799353064495675956728-1584.0-1567.0-1569.0-1560.0
Percentage of DeferredTaxAssetsLiabilitiesNet100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets2.80.11.86.09.314.012.9-3.6-3.6-3.6-3.6

Operating Lease Right Of Use Asset

us-gaap:OperatingLeaseRightOfUseAsset

us-gaap:OperatingLeaseRightOfUseAsset


Operating
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312017-12-31
Value565355775733588156505488562758155906603659940.0
Percentage of OperatingLeaseRightOfUseAsset100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0
Percentage of Assets7.57.68.07.47.88.08.79.29.49.89.90.0

Other Assets Noncurrent

us-gaap:OtherAssetsNoncurrent

us-gaap:OtherAssetsNoncurrent


Other
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312009-12-31
Value14931571135712491481142037664309381538443608343732683446330928782545236317331722157814751428184810981019101011191105115913031280134211311092109911441031100296099210301031749
Percentage of OtherAssetsNoncurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets2.02.11.91.62.02.15.86.86.16.26.06.25.96.46.25.54.94.63.43.43.12.82.73.42.11.91.92.22.12.22.52.82.92.52.52.52.62.32.32.22.32.32.41.7

Equity Securities Fv Ni

us-gaap:EquitySecuritiesFvNi

us-gaap:EquitySecuritiesFvNi


Equity
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312018-12-31
Value141713101384136710991090
Percentage of EquitySecuritiesFvNi100.0100.0100.0100.0100.0100.0
Percentage of Assets2.01.71.92.01.71.8

us-gaap:EquitySecuritiesFvNi dal:EquitySecuritiesInvestmentName

dal:AirFranceKLM


Equity
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312018-12-31
Value181225235130170211418408
Percentage of EquitySecuritiesFvNi0.00.016.69.912.315.438.037.4
Percentage of Assets0.20.30.30.20.20.30.60.7
Percentage of Assets dal:AirFranceKLM0.00.00.00.00.00.00.00.0

dal:ChinaEastern


Equity
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312018-12-31
Value197219201199166159258259
Percentage of EquitySecuritiesFvNi0.00.014.215.212.011.623.523.8
Percentage of Assets0.30.30.30.30.20.20.40.4
Percentage of Assets dal:ChinaEastern0.00.00.00.00.00.00.00.0

dal:ClearSecureInc


Equity
Period End2021-06-302020-12-31
Value331120
Percentage of EquitySecuritiesFvNi0.08.5
Percentage of Assets0.40.2
Percentage of Assets dal:ClearSecureInc0.00.0

dal:HanjinKAL


Equity
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312018-12-31
Value5174475125175885382050.0
Percentage of EquitySecuritiesFvNi0.00.036.139.542.539.418.70.0
Percentage of Assets0.70.60.70.70.80.80.30.0
Percentage of Assets dal:HanjinKAL0.00.00.00.00.00.00.00.0

dal:OtherEquitySecurityFVInvestments


Equity
Period End2021-06-302020-12-312020-09-302020-06-302020-03-312019-12-312018-12-31
Value234469230226225218210
Percentage of EquitySecuritiesFvNi0.033.117.616.316.519.819.3
Percentage of Assets0.30.70.30.30.30.30.3
Percentage of Assets dal:OtherEquitySecurityFVInvestments0.00.00.00.00.00.00.0

dal:WheelsUp


Equity
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-31
Value5205202102342342340.0
Percentage of EquitySecuritiesFvNi0.00.014.817.916.917.10.0
Percentage of Assets0.70.70.30.30.30.30.0
Percentage of Assets dal:WheelsUp0.00.00.00.00.00.00.0

us-gaap:EquitySecuritiesFvNi us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FairValueByMeasurementFrequency

us-gaap:FairValueInputsLevel1, us-gaap:FairValueMeasurementsRecurring


Equity
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312017-12-31
Value12308959488469249088811009980970880485
Percentage of EquitySecuritiesFvNi0.00.066.964.666.866.480.20.00.00.080.70.0
Percentage of Assets1.61.21.31.11.31.31.41.61.61.61.50.9
Percentage of Assets us-gaap:FairValueInputsLevel1 us-gaap:FairValueMeasurementsRecurring0.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:FairValueInputsLevel2, us-gaap:FairValueMeasurementsRecurring


Equity
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312017-12-31
Value5575573823022645921820520520420428
Percentage of EquitySecuritiesFvNi0.00.02.717.616.333.619.80.00.00.018.70.0
Percentage of Assets0.70.80.10.30.30.70.30.30.30.30.30.1
Percentage of Assets us-gaap:FairValueInputsLevel2 us-gaap:FairValueMeasurementsRecurring0.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:FairValueInputsLevel3, us-gaap:FairValueMeasurementsRecurring


Equity
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302019-12-31
Value101221431234234185
Percentage of EquitySecuritiesFvNi0.00.030.417.916.916.8
Percentage of Assets0.10.30.60.30.30.3
Percentage of Assets us-gaap:FairValueInputsLevel3 us-gaap:FairValueMeasurementsRecurring0.00.00.00.00.00.0

us-gaap:EquitySecuritiesFvNi us-gaap:FairValueByMeasurementFrequency

us-gaap:FairValueMeasurementsRecurring


Equity
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312017-12-31
Value18881673141713101384136710991214118511741084513
Percentage of EquitySecuritiesFvNi0.00.0100.0100.0100.0100.0100.00.00.00.099.40.0
Percentage of Assets2.52.32.01.71.92.01.71.91.91.91.81.0
Percentage of Assets us-gaap:FairValueMeasurementsRecurring0.00.00.00.00.00.00.00.00.00.00.00.0

Accounts Payable Current

us-gaap:AccountsPayableCurrent

us-gaap:AccountsPayableCurrent


Accounts
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312009-12-31
Value39303432284024032332333732663470335932142976326537493351367430592726235325722567295627322743268828032492262225772536234123002592257124052293232521751998160016411900190717131249
Percentage of AccountsPayableCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets5.24.73.93.03.24.95.15.55.45.24.95.96.76.26.95.95.34.65.05.05.75.15.25.05.34.64.85.04.94.54.45.65.65.35.15.24.94.53.73.84.34.34.02.9

Contract With Customer Liability Current

us-gaap:ContractWithCustomerLiabilityCurrent us-gaap:ProductOrService

us-gaap:ContractWithCustomerLiabilityCurrent

dal:PassengerAirTraffic


Contract
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302017-12-31
Value67985105404443794686559851165762661666004661553563604364
Percentage of ContractWithCustomerLiabilityCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets9.07.05.65.56.58.17.99.110.610.77.710.111.48.2
Percentage of Assets dal:PassengerAirTraffic0.00.00.00.00.00.00.00.00.00.00.00.00.00.0

dal:ProductAndServiceOtherLoyaltyProgram


Contract
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312017-12-31
Value275724391777128411951099321932003048301329892762
Percentage of ContractWithCustomerLiabilityCurrent40.647.843.929.325.519.662.955.546.145.764.163.3
Percentage of Assets3.73.32.51.61.71.65.05.14.94.95.05.2
Percentage of Assets dal:ProductAndServiceOtherLoyaltyProgram0.00.00.00.00.00.00.00.00.00.00.00.0

Liabilities Current

us-gaap:LiabilitiesCurrent

us-gaap:LiabilitiesCurrent


Liabilities
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312009-12-31
Value235732068815927197252015019392202042021121164213231857818158192692001218573164961663115953152391514716250181081752617608170821731916879148131520915010141521413414775140681327013224146931364612701120121280212260113859797
Percentage of LiabilitiesCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets31.328.322.124.927.928.231.332.033.934.530.833.034.537.034.931.832.131.029.729.731.533.933.032.832.432.231.228.529.128.827.130.732.331.229.829.832.930.929.227.929.227.926.422.4

Long Term Debt Current

us-gaap:LongTermDebtCurrent

us-gaap:LongTermDebtCurrent


Long
Period End2021-06-302021-03-312020-12-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-312010-12-312009-12-31
Value20192671144320541953208729541409108012562145100914151109144915071827-1954.0-1445.0
Percentage of LongTermDebtCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets2.73.72.03.23.13.34.82.32.02.34.02.02.72.02.83.44.2-4.5-3.3

Operating Lease Liability Current

us-gaap:OperatingLeaseLiabilityCurrent

us-gaap:OperatingLeaseLiabilityCurrent


Operating
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312017-12-31
Value6386536787147327688018448419419550.0
Percentage of OperatingLeaseLiabilityCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0
Percentage of Assets0.80.90.90.91.01.11.21.31.31.51.60.0

Other Accrued Liabilities Current

us-gaap:OtherAccruedLiabilitiesCurrent

us-gaap:OtherAccruedLiabilitiesCurrent


Other
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312009-12-31
Value37632794167028963327130910781181133513971117132915212404185822432457261916501366150317191306137914681991212790276883711215717548731128985164110411867861727613654765
Percentage of OtherAccruedLiabilitiesCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets5.03.82.33.74.61.91.71.92.12.31.92.42.74.43.54.34.75.13.22.72.93.22.52.62.83.73.91.71.51.62.11.21.61.92.52.23.72.44.32.01.71.41.51.7

Liabilities Noncurrent

us-gaap:LiabilitiesNoncurrent

us-gaap:LiabilitiesNoncurrent


Liabilities
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312009-12-31
Value5045551913545355599443421350372897027940273962760728001231412367121509208092143121705225612373523291235742398224758256932613627387284292483124779255162645731726321813294333411311763116231554321942980230291308633090633747
Percentage of LiabilitiesNoncurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets67.071.075.770.860.151.044.944.243.844.646.542.142.439.839.041.341.943.846.345.745.745.046.647.949.551.052.547.847.548.950.669.070.373.175.070.369.771.474.069.269.070.371.677.1

Long Term Debt

us-gaap:LongTermDebt

us-gaap:LongTermDebt


Long
Period End2021-06-302021-03-312020-12-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312009-12-31
Value272652747327974101069025929610389936888819514844070087946937910845121061231912675130601375013892143901450716665
Percentage of LongTermDebt100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets36.237.638.915.714.314.916.815.516.117.115.813.715.017.320.827.227.528.730.031.931.732.833.638.1

Long Term Debt Noncurrent

us-gaap:LongTermDebtNoncurrent

us-gaap:LongTermDebtNoncurrent


Long
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-312010-12-312009-12-31
Value25246248022653128910185391175080527072720974357959780182586295599965318270939610599112331255315220
Percentage of LongTermDebtNoncurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets33.533.936.936.625.717.112.511.211.512.013.214.214.811.811.712.315.318.023.825.829.134.8

Long Term Debt And Capital Lease Obligations

us-gaap:LongTermDebtAndCapitalLeaseObligations

us-gaap:LongTermDebtAndCapitalLeaseObligations


Long
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312009-12-31
Value266792606127425298251941212662887379237710771082538115856263606592758479168187620164736689692067667096759883058561897090899466979510077105261072111082111111122111521118471255713026134461317915665
Percentage of LongTermDebtAndCapitalLeaseObligations100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets35.435.738.137.726.918.413.712.512.312.513.714.815.311.812.414.615.315.912.112.713.013.012.713.214.415.515.817.317.418.118.721.923.023.824.925.125.126.127.229.229.730.630.535.8

Pension And Other Postretirement Defined Benefit Plans Liabilities Noncurrent

us-gaap:PensionAndOtherPostretirementDefinedBenefitPlansLiabilitiesNoncurrent

us-gaap:PensionAndOtherPostretirementDefinedBenefitPlansLiabilitiesNoncurrent


Pension
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312009-12-31
Value8644103961063092728160828584528457851690869163890290529193981095659623102911337812587125761269513855138671386914170151381152911523118111239215379153561586516005136881361313905142001125011307114871149311745
Percentage of PensionAndOtherPostretirementDefinedBenefitPlansLiabilitiesNoncurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets11.514.214.811.711.312.113.113.413.614.715.216.216.217.018.418.418.620.026.124.724.423.826.125.826.326.428.022.222.122.623.733.433.535.235.930.930.431.532.626.125.826.226.626.8

us-gaap:PensionAndOtherPostretirementDefinedBenefitPlansLiabilitiesNoncurrent us-gaap:RetirementPlanType

us-gaap:OtherPostretirementBenefitPlansDefinedBenefit


Pension
Period End2020-12-312019-12-312018-12-312017-12-312016-12-31
Value41272647246525172470
Percentage of PensionAndOtherPostretirementDefinedBenefitPlansLiabilitiesNoncurrent38.831.326.925.718.5
Percentage of Assets5.74.14.14.74.8
Percentage of Assets us-gaap:OtherPostretirementBenefitPlansDefinedBenefit0.00.00.00.00.0

us-gaap:PensionPlansDefinedBenefit


Pension
Period End2020-12-312019-12-312018-12-312017-12-312016-12-31
Value607553356323692010528
Percentage of PensionAndOtherPostretirementDefinedBenefitPlansLiabilitiesNoncurrent57.163.169.070.578.7
Percentage of Assets8.48.310.513.020.5
Percentage of Assets us-gaap:PensionPlansDefinedBenefit0.00.00.00.00.0

Other Liabilities Noncurrent

us-gaap:OtherLiabilitiesNoncurrent

us-gaap:OtherLiabilitiesNoncurrent


Other
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312009-12-31
Value47154792486249973930166613861378202513951132251723652320211120011885182218781956201520911891246523222457212819461735171217111709168016941649171116061489141914241383138615331222
Percentage of OtherLiabilitiesNoncurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets6.36.66.86.35.42.42.12.23.22.31.94.64.24.34.03.93.63.53.73.83.93.93.64.64.44.63.93.73.33.33.33.73.73.83.73.93.63.43.33.33.23.23.52.8

Operating Lease Liability Noncurrent

us-gaap:OperatingLeaseLiabilityNoncurrent

us-gaap:OperatingLeaseLiabilityNoncurrent


Operating
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312017-12-31
Value563355685713585653715204529454415539580558010.0
Percentage of OperatingLeaseLiabilityNoncurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0
Percentage of Assets7.57.67.97.47.47.68.28.68.99.49.60.0

Lessee Operating Lease Liability Payments Due Year Two

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearTwo

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearTwo


Lessee
Period End2020-12-31
Value848
Percentage of LesseeOperatingLeaseLiabilityPaymentsDueYearTwo100.0
Percentage of Assets1.2

Lessee Operating Lease Liability Payments Due Year Three

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearThree

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearThree


Lessee
Period End2020-12-31
Value837
Percentage of LesseeOperatingLeaseLiabilityPaymentsDueYearThree100.0
Percentage of Assets1.2

Lessee Operating Lease Liability Payments Due Year Four

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearFour

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearFour


Lessee
Period End2020-12-31
Value770
Percentage of LesseeOperatingLeaseLiabilityPaymentsDueYearFour100.0
Percentage of Assets1.1

Lessee Operating Lease Liability Payments Due Year Five

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearFive

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearFive


Lessee
Period End2020-12-31
Value746
Percentage of LesseeOperatingLeaseLiabilityPaymentsDueYearFive100.0
Percentage of Assets1.0

Lessee Operating Lease Liability Payments Due After Year Five

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueAfterYearFive

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueAfterYearFive


Lessee
Period End2020-12-31
Value4450
Percentage of LesseeOperatingLeaseLiabilityPaymentsDueAfterYearFive100.0
Percentage of Assets6.2

Operating Lease Liability

us-gaap:OperatingLeaseLiability

us-gaap:OperatingLeaseLiability


Operating
Period End2020-12-31
Value6391
Percentage of OperatingLeaseLiability100.0
Percentage of Assets8.9

Lessee Operating Lease Liability Payments Due

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDue

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDue


Lessee
Period End2020-12-31
Value8600
Percentage of LesseeOperatingLeaseLiabilityPaymentsDue100.0
Percentage of Assets11.9

Lessee Operating Lease Liability Undiscounted Excess Amount

us-gaap:LesseeOperatingLeaseLiabilityUndiscountedExcessAmount

us-gaap:LesseeOperatingLeaseLiabilityUndiscountedExcessAmount


Lessee
Period End2020-12-31
Value2209
Percentage of LesseeOperatingLeaseLiabilityUndiscountedExcessAmount100.0
Percentage of Assets3.1

Stockholders Equity

us-gaap:StockholdersEquity

us-gaap:StockholdersEquity


Stockholders
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312009-12-312008-12-312007-12-31
Value12814821534335786901430915358150681395812911136871370412856125571391014001134791294512287125101181011252108501034595639046881312296122031164111643137-1184.0-1943.0-2131.0-48.0-1135.0-1011.0-1396.0122278575889724587410113
Percentage of StockholdersEquity100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets1.70.72.14.212.020.823.823.822.320.922.724.923.023.226.127.026.025.224.024.622.921.120.419.318.116.816.323.723.422.322.30.3-2.6-4.3-4.8-0.1-2.5-2.3-3.22.81.81.72.10.60.00.0

us-gaap:StockholdersEquity us-gaap:StatementEquityComponents

dal:AOCIOther


Stockholders
Period End2021-06-302021-03-312020-12-312020-06-302020-03-312019-12-312018-12-312017-12-31
Value4040403112710610085
Percentage of StockholdersEquity3.18.32.60.40.90.70.70.6
Percentage of Assets0.10.10.10.00.20.20.20.2
Percentage of Assets dal:AOCIOther0.00.00.00.00.00.00.00.0

dal:AccumulatedNetGainLossAndAdjustmentOther


Stockholders
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-31
Value403112710610310199100
Percentage of StockholdersEquity1.20.40.90.70.70.70.80.7
Percentage of Assets0.10.00.20.20.20.20.20.2
Percentage of Assets dal:AccumulatedNetGainLossAndAdjustmentOther0.00.00.00.00.00.00.00.0

us-gaap:AccumulatedDefinedBenefitPlansAdjustment


Stockholders
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302014-12-312013-12-31
Value-8922.0-9000.0-9078.0-7979.0-7968.0-8025.0-8095.0-7748.0-7795.0-7865.0-7925.0-7635.0-7701.0-7761.0-7812.0-7592.0-7631.0-7673.0-7714.0-7243.0-7282.0-7318.0-7354.0-7403.0-7442.0-7517.0-5323.0
Percentage of StockholdersEquity-696.5-1867.2-591.8-237.7-91.7-56.1-52.7-51.4-55.8-60.9-57.9-55.7-59.9-61.8-56.2-54.2-56.6-59.3-62.8-57.9-61.7-65.0-67.8-71.6-77.8-85.3-45.7
Percentage of Assets-11.8-12.3-12.6-10.1-11.0-11.7-12.5-12.3-12.5-12.7-13.2-13.9-13.8-14.4-14.7-14.6-14.7-14.9-15.0-14.2-14.1-13.7-13.8-13.8-14.1-13.9-10.2
Percentage of Assets us-gaap:AccumulatedDefinedBenefitPlansAdjustment0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:AccumulatedOtherComprehensiveIncome


Stockholders
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302014-12-312013-12-312012-12-312011-12-312010-12-312009-12-312008-12-312007-12-31
Value-8882.0-8960.0-9038.0-7939.0-7937.0-7898.0-7989.0-7645.0-7694.0-7766.0-7825.0-7535.0-7606.0-7681.0-7621.0-7476.0-7549.0-7571.0-7636.0-7212.0-7279.0-7279.0-7275.0-7316.0-7288.0-7311.0-5130.0-8577.0-6766.0-3578.0-3563.0-4080.0435
Percentage of StockholdersEquity-693.4-1858.9-589.2-236.5-91.3-55.2-52.0-50.7-55.1-60.2-57.2-55.0-59.2-61.2-54.8-53.4-56.0-58.5-62.1-57.6-61.6-64.7-67.1-70.7-76.2-83.0-44.1402.5484.7-398.9-1454.3-466.84.3
Percentage of Assets-11.8-12.3-12.6-10.0-11.0-11.5-12.4-12.1-12.3-12.6-13.0-13.7-13.6-14.2-14.3-14.4-14.6-14.7-14.9-14.2-14.1-13.6-13.7-13.6-13.8-13.5-9.8-19.3-15.6-8.3-8.10.00.0
Percentage of Assets us-gaap:AccumulatedOtherComprehensiveIncome0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:AdditionalPaidInCapital


Stockholders
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-312010-12-312009-12-312008-12-312007-12-31
Value1139611326112591124111192110541112911177112011125411671117401180711967120531229410875129811398214069139991392613827137149512
Percentage of StockholdersEquity889.62349.8734.0334.9128.877.372.574.280.287.285.385.791.895.386.6100.1100.2147.3120.1-660.2-1002.81552.55643.71569.194.1
Percentage of Assets15.115.515.614.215.516.117.217.717.918.219.421.321.222.122.624.020.524.026.831.632.232.231.60.00.0
Percentage of Assets us-gaap:AdditionalPaidInCapital0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:RetainedEarnings


Stockholders
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-312010-12-312009-12-312008-12-312007-12-31
Value-953.0-1605.0-428.032757061142312454117721068696561003994838629823096367903762334563049-7389.0-8398.0-9252.0-9845.0-8608.0314
Percentage of StockholdersEquity-74.4-333.0-27.99.765.779.881.178.176.674.873.369.267.165.569.364.370.339.226.2346.7601.6-1031.4-4018.4-984.93.1
Percentage of Assets-1.3-2.2-0.60.47.916.619.318.617.115.616.717.215.515.218.115.414.36.45.8-16.6-19.3-21.4-22.50.00.0
Percentage of Assets us-gaap:RetainedEarnings0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:TreasuryStock


Stockholders
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-312010-12-312009-12-312008-12-312007-12-31
Value-280.0-279.0-259.0-272.0-271.0-270.0-236.0-236.0-235.0-233.0-198.0-197.0-196.0-194.0-158.0-274.0-373.0-313.0-258.0-234.0-231.0-199.0-174.0-152.0-148.0
Percentage of StockholdersEquity-21.9-57.9-16.9-8.1-3.1-1.9-1.5-1.6-1.7-1.8-1.4-1.4-1.5-1.5-1.1-2.2-3.4-3.6-2.211.016.5-22.2-71.0-17.4-1.5
Percentage of Assets-0.4-0.4-0.4-0.3-0.4-0.4-0.4-0.4-0.4-0.4-0.3-0.4-0.4-0.4-0.3-0.5-0.7-0.6-0.5-0.5-0.5-0.5-0.40.00.0
Percentage of Assets us-gaap:TreasuryStock0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

Additional Paid In Capital Common Stock

us-gaap:AdditionalPaidInCapitalCommonStock

us-gaap:AdditionalPaidInCapitalCommonStock


Additional
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312009-12-31
Value11396113261125911241111921105411129111771120111254116711174011807119671205312133122791244312294888793611033910875112851168112578129811346413687138761398214096141501412014069140451403114015139991398313964139451392613827
Percentage of AdditionalPaidInCapitalCommonStock100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets15.115.515.614.215.516.117.217.717.918.219.421.321.222.122.623.423.724.224.017.418.119.420.521.022.123.424.025.926.226.626.830.630.931.331.631.731.431.732.232.531.831.832.231.6

Retained Earnings Accumulated Deficit

us-gaap:RetainedEarningsAccumulatedDeficit

us-gaap:RetainedEarningsAccumulatedDeficit


Retained
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312009-12-31
Value-953.0-1605.0-428.03275706114231245411772106869656100399696885184659636950289058226790311109100008462762367485540412734564244396232113049-5379.0-6748.0-7382.0-7389.0-7395.0-8442.0-8274.0-8398.0-8823.0-9372.0-9570.0-9252.0-9845.0
Percentage of RetainedEarningsAccumulatedDeficit100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets-1.3-2.2-0.60.47.916.619.318.617.115.616.717.615.915.718.118.317.216.015.421.819.415.914.312.610.57.76.48.27.66.25.8-11.7-14.7-16.4-16.6-16.7-18.9-18.7-19.3-20.5-21.4-21.8-21.4-22.5

Accumulated Other Comprehensive Income Loss Net Of Tax

us-gaap:AccumulatedOtherComprehensiveIncomeLossNetOfTax

us-gaap:AccumulatedOtherComprehensiveIncomeLossNetOfTax


Accumulated
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312009-12-312008-12-312007-12-31
Value-8882.0-8960.0-9038.0-7939.0-7937.0-7898.0-7989.0-7645.0-7694.0-7766.0-7825.0-7535.0-7606.0-7681.0-7621.0-7476.0-7549.0-7571.0-7636.0-7212.0-7279.0-7279.0-7275.0-7316.0-7288.0-7294.0-7311.0-5100.0-5137.0-5139.0-5130.0-8324.0-8331.0-8426.0-8577.0-6464.0-6490.0-6518.0-6766.0-3724.0-3593.0-3403.0-3578.0-3563.0-4080.0435
Percentage of AccumulatedOtherComprehensiveIncomeLossNetOfTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets-11.8-12.3-12.6-10.0-11.0-11.5-12.4-12.1-12.3-12.6-13.0-13.7-13.6-14.2-14.3-14.4-14.6-14.7-14.9-14.2-14.1-13.6-13.7-13.6-13.8-13.6-13.5-9.8-9.8-9.9-9.8-18.1-18.2-18.7-19.3-14.6-14.5-14.8-15.6-8.7-8.2-7.8-8.3-8.10.00.0

Treasury Stock Value

us-gaap:TreasuryStockValue

us-gaap:TreasuryStockValue


Treasury
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312009-12-31
Value280279259272271270236236235233198197196194158158156153274274272270373372370365313312309307258256255255234234234234231214214214199174
Percentage of TreasuryStockValue100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets0.40.40.40.30.40.40.40.40.40.40.30.40.40.40.30.30.30.30.50.50.50.50.70.70.70.70.60.60.60.60.50.60.60.60.50.50.50.50.50.50.50.50.50.4

Net Cash Provided By Used In Operating Activities

us-gaap:NetCashProvidedByUsedInOperatingActivities

us-gaap:NetCashProvidedByUsedInOperatingActivities


Net
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value1866691-1286.0-2575.0-290.03589572245327219511364150028071343191816452386-801.0112518543215101114792067274516365821358205695111311161120810045504636328311158-98.09867883185141034966
Percentage of NetCashProvidedByUsedInOperatingActivities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax26.216.7-32.4-84.1-19.84.28.417.926.118.612.712.523.813.518.714.922.2-8.811.917.730.810.915.618.625.617.46.012.119.410.712.511.112.411.86.44.76.59.913.8-1.010.810.24.15.712.714.1

Net Cash Provided By Used In Investing Activities

us-gaap:NetCashProvidedByUsedInInvestingActivities

us-gaap:NetCashProvidedByUsedInInvestingActivities


Net
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value26-60.0-1048.0-1144.0-4075.0-2971.0-767.0-1125.0-1566.0-1105.0-1012.0-909.0-1545.0-927.0-1332.0-1322.0-978.0-1734.0445-887.0-1112.0-601.0-1179.0-1009.0-955.0-812.0-38.0-1583.0-279.0-563.0-948.0-617.0-561.0-630.0-533.0-428.0-652.0-349.0-412.0-212.0-298.0-576.0-669.0-802.0-262.0-293.0
Percentage of NetCashProvidedByUsedInInvestingActivities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax0.4-1.4-26.4-37.4-277.6-34.6-6.7-9.0-12.5-10.6-9.4-7.6-13.1-9.3-13.0-12.0-9.1-19.04.7-8.5-10.6-6.5-12.4-9.1-8.9-8.6-0.4-14.2-2.6-6.3-10.4-5.9-5.8-7.4-6.2-4.3-6.7-4.1-4.9-2.2-3.3-7.4-8.6-9.0-3.2-4.3

Net Cash Provided By Used In Financing Activities

us-gaap:NetCashProvidedByUsedInFinancingActivities

us-gaap:NetCashProvidedByUsedInFinancingActivities


Net
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value-330.0-790.0-5957.01024797225344842-1451.0-1662.0-609.0-252.0-1203.0516-787.0-250.0-1086.0-1074.01680-446.0-991.0-2149.0-674.0-697.0-982.0-1619.0-790.0-966.0-627.0-1114.0-533.0-357.0-491.0-318.0-154.0125-300.0-352.0-228.0-396.0-238.0-714.0-223.0-193.0-710.0-1251.0-367.0
Percentage of NetCashProvidedByUsedInFinancingActivities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax-4.6-19.0-149.9334.7662.362.27.4-11.6-13.3-5.8-2.3-10.14.4-7.9-2.4-9.8-10.018.4-4.7-9.5-20.6-7.3-7.3-8.8-15.1-8.4-10.0-5.6-10.5-6.0-3.9-4.7-3.3-1.81.5-3.0-3.6-2.7-4.7-2.4-7.8-2.9-2.5-7.9-15.3-5.4

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

us-gaap:CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect

us-gaap:CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect


Cash
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value1562-159.0-8291.06528535727311032-331.044237100-612.01778-371.0336-788.0337-858.0
Percentage of CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax21.9-3.8-208.7213.2364.931.89.0-2.60.42.30.9-5.115.1-3.73.3-7.13.1-9.4

Depreciation Depletion And Amortization

us-gaap:DepreciationDepletionAndAmortization

us-gaap:DepreciationDepletionAndAmortization


Depreciation
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-31
Value501492499545591678621631713615549580590610586574535540472474470486451466448470438440451442
Percentage of DepreciationDepletionAndAmortization100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DepreciationDepletionAndAmortization us-gaap:ConsolidationItems

us-gaap:IntersegmentElimination


Depreciation
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value-24.0-24.0-25.0-25.0-25.0-25.0-99.00.00.00.0-67.00.00.00.0
Percentage of DepreciationDepletionAndAmortization-4.8-4.9-5.0-4.6-4.2-3.7-15.90.00.00.0-12.20.00.00.0

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

us-gaap:OperatingSegments, dal:Airline


Depreciation
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-31
Value501492499545591678695606688592530564573595571563524530460464461477444458440463
Percentage of DepreciationDepletionAndAmortization100.0100.0100.0100.0100.0100.0111.996.096.596.396.597.297.197.597.498.197.998.197.597.998.198.198.498.398.298.5

us-gaap:OperatingSegments, dal:Refinery


Depreciation
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-31
Value242425252525252525231916171515111110.01210.09.09.07.08.08.07.0
Percentage of DepreciationDepletionAndAmortization4.84.95.04.64.23.74.04.03.53.73.52.82.92.52.61.92.11.92.52.11.91.91.61.71.81.5

Net Cash Provided By Used In Operating Activities

us-gaap:NetCashProvidedByUsedInOperatingActivities

us-gaap:NetCashProvidedByUsedInOperatingActivities


Net
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value1866691-1286.0-2575.0-290.03589572245327219511364150028071343191816452386-801.0112518543215101114792067274516365821358205695111311161120810045504636328311158-98.09867883185141034966
Percentage of NetCashProvidedByUsedInOperatingActivities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax26.216.7-32.4-84.1-19.84.28.417.926.118.612.712.523.813.518.714.922.2-8.811.917.730.810.915.618.625.617.46.012.119.410.712.511.112.411.86.44.76.59.913.8-1.010.810.24.15.712.714.1

Net Income Loss

us-gaap:NetIncomeLoss

us-gaap:NetIncomeLoss


Net
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312009-09-302009-06-302009-03-31
Value652-1177.0-755.0-5379.0-5717.0-534.0109914951443730101913121025547572117812246036221259154694698013151485746-712.0357801213847913696857.07.01047-168.0124425549198-318.019363467-256.0-25.0-161.0-257.0-794.0
Percentage of NetIncomeLoss100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax9.1-28.4-19.0-175.7-389.4-6.29.611.911.57.09.511.08.75.55.610.711.46.66.612.014.810.210.311.813.97.9-7.43.27.52.493.413.17.10.10.110.6-1.71.55.15.62.2-4.10.24.15.7-3.7-0.4-2.1-3.7-11.9

us-gaap:NetIncomeLoss us-gaap:StatementEquityComponents

us-gaap:RetainedEarnings


Net
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-31
Value652-1177.0-5379.0-5717.0-534.01495144373013221036557
Percentage of NetIncomeLoss100.0100.0100.0100.0100.0100.0100.0100.0100.8101.1101.8
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax9.1-28.4-175.7-389.4-6.211.911.57.011.18.85.6
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:RetainedEarnings0.00.00.00.00.00.00.00.00.00.00.0

Net Cash Provided By Used In Investing Activities

us-gaap:NetCashProvidedByUsedInInvestingActivities

us-gaap:NetCashProvidedByUsedInInvestingActivities


Net
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value26-60.0-1048.0-1144.0-4075.0-2971.0-767.0-1125.0-1566.0-1105.0-1012.0-909.0-1545.0-927.0-1332.0-1322.0-978.0-1734.0445-887.0-1112.0-601.0-1179.0-1009.0-955.0-812.0-38.0-1583.0-279.0-563.0-948.0-617.0-561.0-630.0-533.0-428.0-652.0-349.0-412.0-212.0-298.0-576.0-669.0-802.0-262.0-293.0
Percentage of NetCashProvidedByUsedInInvestingActivities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax0.4-1.4-26.4-37.4-277.6-34.6-6.7-9.0-12.5-10.6-9.4-7.6-13.1-9.3-13.0-12.0-9.1-19.04.7-8.5-10.6-6.5-12.4-9.1-8.9-8.6-0.4-14.2-2.6-6.3-10.4-5.9-5.8-7.4-6.2-4.3-6.7-4.1-4.9-2.2-3.3-7.4-8.6-9.0-3.2-4.3

Payments To Acquire Productive Assets

us-gaap:PaymentsToAcquireProductiveAssets

us-gaap:PaymentsToAcquireProductiveAssets


Payments
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-31
Value76143854913328293710729461560136013559671580126511609419888027946801046871878562919586660457518614952631338647
Percentage of PaymentsToAcquireProductiveAssets100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

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

us-gaap:OperatingSegments, dal:Airline


Payments
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-31
Value75242554313028192610449361552135012599281567125011389019287767346521026858832536906579
Percentage of PaymentsToAcquireProductiveAssets98.897.098.997.799.698.897.498.999.599.392.996.099.298.898.195.793.996.892.495.998.198.594.895.498.698.8

us-gaap:OperatingSegments, dal:Refinery


Payments
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-31
Value9.0135.03.01.0112810.08.010.09639131522406026602820134626137.0
Percentage of PaymentsToAcquireProductiveAssets1.23.00.92.30.41.22.61.10.50.77.14.00.81.21.94.36.13.27.64.11.91.55.24.61.41.2

Net Cash Provided By Used In Financing Activities

us-gaap:NetCashProvidedByUsedInFinancingActivities

us-gaap:NetCashProvidedByUsedInFinancingActivities


Net
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value-330.0-790.0-5957.01024797225344842-1451.0-1662.0-609.0-252.0-1203.0516-787.0-250.0-1086.0-1074.01680-446.0-991.0-2149.0-674.0-697.0-982.0-1619.0-790.0-966.0-627.0-1114.0-533.0-357.0-491.0-318.0-154.0125-300.0-352.0-228.0-396.0-238.0-714.0-223.0-193.0-710.0-1251.0-367.0
Percentage of NetCashProvidedByUsedInFinancingActivities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax-4.6-19.0-149.9334.7662.362.27.4-11.6-13.3-5.8-2.3-10.14.4-7.9-2.4-9.8-10.018.4-4.7-9.5-20.6-7.3-7.3-8.8-15.1-8.4-10.0-5.6-10.5-6.0-3.9-4.7-3.3-1.81.5-3.0-3.6-2.7-4.7-2.4-7.8-2.9-2.5-7.9-15.3-5.4

Proceeds From Issuance Of Long Term Debt

us-gaap:ProceedsFromIssuanceOfLongTermDebt

us-gaap:ProceedsFromIssuanceOfLongTermDebt


Proceeds
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-08-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value978924309107347785396215570.00.05006210.031240.04500.00.020040.00.00.04500.05009970.0414070721459200680.00.014854800.00.01578113542459072230.00.0
Percentage of ProceedsFromIssuanceOfLongTermDebt100.0100.0100.0100.0100.0100.0100.00.00.0100.0100.00.0100.00.0100.00.00.0100.00.00.00.0100.00.0100.0100.00.0100.0100.0100.0100.0100.0100.0100.00.00.0100.0100.00.00.0100.0100.0100.0100.0100.0100.00.00.0

us-gaap:ProceedsFromIssuanceOfLongTermDebt us-gaap:DebtInstrument, us-gaap:LongtermDebtType

dal:NYTDCSpecialFacilitiesRevenueBondsSeries2020, us-gaap:Bonds


Proceeds
Period End2020-09-30
Value1500
Percentage of ProceedsFromIssuanceOfLongTermDebt14.0

Repayments Of Long Term Debt

us-gaap:RepaymentsOfLongTermDebt us-gaap:DebtInstrument, us-gaap:LongtermDebtType

us-gaap:RepaymentsOfLongTermDebt

dal:Certificates, us-gaap:SecuredDebt


Repayments
Period End2021-06-30
Value450
Percentage of RepaymentsOfLongTermDebt100.0

Payments Of Dividends

us-gaap:PaymentsOfDividends

us-gaap:PaymentsOfDividends


Payments
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-31
Value0.00.00.026025926022823323924021321721521914814914915010310710510772757575505151510.00.00.0
Percentage of PaymentsOfDividends0.00.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.00.00.0

Payments For Repurchase Of Common Stock

us-gaap:PaymentsForRepurchaseOfCommonStock

us-gaap:PaymentsForRepurchaseOfCommonStock


Payments
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-31
Value0.00.00.034422520926813253253256003253275506002003005001026775425425925425500250225125157930.00.00.0
Percentage of PaymentsForRepurchaseOfCommonStock0.00.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.00.00.0

Debt Instrument Interest Rate Stated Percentage

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

us-gaap:DebtInstrumentInterestRateStatedPercentage

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


Debt
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-30
Value7.387.387.387.380.07380.04380.04380.04380.04380.03630.03630.0363
Percentage of DebtInstrumentInterestRateStatedPercentage100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of LongTermDebtAndCapitalLeaseObligations0.00.00.00.00.00.00.00.00.00.00.00.0
Percentage of LongTermDebtAndCapitalLeaseObligations srt:Maximum dal:UnsecuredNotes us-gaap:UnsecuredDebt0.00.00.00.00.00.00.00.00.00.00.00.0

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

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber


Share
Period End2020-12-312010-12-312009-12-31
Value5.42022
Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber100.0100.0100.0

Deferred Tax Assets Net

us-gaap:DeferredTaxAssetsNet

us-gaap:DeferredTaxAssetsNet


Deferred
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-312010-12-312009-12-31
Value9067630068416115107021245614386138705282558754425665
Percentage of DeferredTaxAssetsNet100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Deferred Tax Assets Valuation Allowance

us-gaap:DeferredTaxAssetsValuationAllowance

us-gaap:DeferredTaxAssetsValuationAllowance


Deferred
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-312010-12-312009-12-312008-12-312007-12-31
Value46058131940564617710963107059632989798304843
Percentage of DeferredTaxAssetsValuationAllowance100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

dal:AncillaryBusinessesAndRefineryExpenses

dal:AncillaryBusinessesAndRefineryExpenses


Ancillary
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value939706604561401219300279316351299410494493520387296292
Percentage of AncillaryBusinessesAndRefineryExpenses100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

dal:ContractWithCustomerLiabilityRefundToCustomer

dal:ContractWithCustomerLiabilityRefundToCustomer


Contract
Period End2020-12-312020-09-302020-06-30
Value3006501300
Percentage of ContractWithCustomerLiabilityRefundToCustomer100.0100.0100.0

dal:EmployeeRelatedCostReductionsNumberOfEmployeesVolunteeringForLeave

dal:EmployeeRelatedCostReductionsNumberOfEmployeesVolunteeringForLeave


Employee
Period End2020-12-31
Value0
Percentage of EmployeeRelatedCostReductionsNumberOfEmployeesVolunteeringForLeave0.0

dal:FinancingTransactionsCompletedAmount

dal:FinancingTransactionsCompletedAmount


Financing
Period End2020-12-31
Value-1100.0
Percentage of FinancingTransactionsCompletedAmount100.0

dal:GrantPaymentsAsPercentageOfTotalPaymentsReceivedThroughPayrollSupportProgram us-gaap:SubsequentEventType

dal:GrantPaymentsAsPercentageOfTotalPaymentsReceivedThroughPayrollSupportProgram

us-gaap:SubsequentEvent


Grant
Period End2021-01-15
Value70.0
Percentage of GrantPaymentsAsPercentageOfTotalPaymentsReceivedThroughPayrollSupportProgram100.0

dal:GrantPaymentsReceivedThroughPayrollSupportProgram

dal:GrantPaymentsReceivedThroughPayrollSupportProgram


Grant
Period End2021-03-31
Value2000
Percentage of GrantPaymentsReceivedThroughPayrollSupportProgram100.0

dal:GrantPaymentsReceivedThroughPayrollSupportProgram dal:PayrollSupportProgram

dal:PayrollSupportProgram3


Grant
Period End2021-06-30
Value2200
Percentage of GrantPaymentsReceivedThroughPayrollSupportProgram0.0

dal:GrantPaymentsReceivedThroughPayrollSupportProgram us-gaap:StatementScenario

srt:ScenarioForecast


Grant
Period End2021-03-31
Value2000
Percentage of GrantPaymentsReceivedThroughPayrollSupportProgram100.0

dal:GrantPaymentsReceivedThroughPayrollSupportProgramCARESAct

dal:GrantPaymentsReceivedThroughPayrollSupportProgramCARESAct


Grant
Period End2020-12-31
Value0.0
Percentage of GrantPaymentsReceivedThroughPayrollSupportProgramCARESAct0.0

dal:GrantsRecognizedCARESAct

dal:GrantsRecognizedCARESAct


Grants
Period End2020-09-302020-06-302019-06-30
Value131512800.0
Percentage of GrantsRecognizedCARESAct100.0100.00.0

dal:GrantsRecognizedGovernmentGrants

dal:GrantsRecognizedGovernmentGrants


Grants
Period End2021-06-302021-03-312020-06-30
Value150411861280
Percentage of GrantsRecognizedGovernmentGrants100.0100.0100.0

dal:GrantsRecognizedGovernmentGrants dal:PayrollSupportProgram

dal:PayrollSupportProgram2


Grants
Period End2021-06-30
Value1100
Percentage of GrantsRecognizedGovernmentGrants73.1

dal:PayrollSupportProgram3


Grants
Period End2021-06-30
Value356
Percentage of GrantsRecognizedGovernmentGrants23.7

dal:IncomeLossFromEquityMethodInvestmentsAndOtherThanTemporaryImpairment

dal:IncomeLossFromEquityMethodInvestmentsAndOtherThanTemporaryImpairment


Income
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-30
Value0.0-54.00.0-114.0-2058.0-260.0-18.027-17.0
Percentage of IncomeLossFromEquityMethodInvestmentsAndOtherThanTemporaryImpairment0.0100.00.0100.0100.0100.0100.0100.0100.0

dal:IncomeLossFromEquityMethodInvestmentsAndOtherThanTemporaryImpairment us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName

dal:VirginAtlantic


Income
Period End2020-12-312020-09-30
Value1.0-311.0
Percentage of IncomeLossFromEquityMethodInvestmentsAndOtherThanTemporaryImpairment0.0272.8

dal:LoyaltyProgramLiabilityMileageCreditsEarned

dal:LoyaltyProgramLiabilityMileageCreditsEarned


Loyalty
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-31
Value561354260212660810822720772819731
Percentage of LoyaltyProgramLiabilityMileageCreditsEarned100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

dal:LoyaltyProgramLiabilityNonTravelMileageCreditsRedeemed

dal:LoyaltyProgramLiabilityNonTravelMileageCreditsRedeemed


Loyalty
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-31
Value1710.09.03.028364145434240
Percentage of LoyaltyProgramLiabilityNonTravelMileageCreditsRedeemed100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

dal:LoyaltyProgramLiabilityTravelMileageCreditsRedeemed

dal:LoyaltyProgramLiabilityTravelMileageCreditsRedeemed


Loyalty
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-31
Value42824114345543732751692678680618
Percentage of LoyaltyProgramLiabilityTravelMileageCreditsRedeemed100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

dal:NumberOfAircraftRemovedFromActiveService

dal:NumberOfAircraftRemovedFromActiveService


Number
Period End2020-12-312020-09-302020-06-302020-03-31
Value-150.0-100.0200.0400.0
Percentage of NumberOfAircraftRemovedFromActiveService100.0100.0100.0100.0

dal:OtherNoncashFinancings

dal:OtherNoncashFinancings


Other
Period End2021-06-302021-03-31
Value40200
Percentage of OtherNoncashFinancings100.0100.0

dal:PaymentsToSupportEstablishmentOfStrategicAlliance us-gaap:CounterpartyName

dal:PaymentsToSupportEstablishmentOfStrategicAlliance

dal:LATAMAirlinesGroupS.A.


Payments
Period End2020-09-30
Value75
Percentage of PaymentsToSupportEstablishmentOfStrategicAlliance100.0

dal:ProceedsFromGovernmentAssistancePayrollSupportProgramCARESAct

dal:ProceedsFromGovernmentAssistancePayrollSupportProgramCARESAct


Proceeds
Period End2020-12-312020-06-30
Value0.04900
Percentage of ProceedsFromGovernmentAssistancePayrollSupportProgramCARESAct0.0100.0

dal:ProceedsFromGovernmentPayrollSupportProgram

dal:ProceedsFromGovernmentPayrollSupportProgram


Proceeds
Period End2021-03-31
Value2900
Percentage of ProceedsFromGovernmentPayrollSupportProgram100.0

dal:ProceedsFromGovernmentPayrollSupportProgram dal:PayrollSupportProgram

dal:PayrollSupportProgram3


Proceeds
Period End2021-06-30
Value3100
Percentage of ProceedsFromGovernmentPayrollSupportProgram0.0

dal:ProceedsFromGovernmentPayrollSupportProgram us-gaap:StatementScenario

srt:ScenarioForecast


Proceeds
Period End2021-03-31
Value1500
Percentage of ProceedsFromGovernmentPayrollSupportProgram51.7

dal:ProceedsFromGovernmentPayrollSupportProgram us-gaap:SubsequentEventType

us-gaap:SubsequentEvent


Proceeds
Period End2021-01-31
Value1400
Percentage of ProceedsFromGovernmentPayrollSupportProgram0.0

dal:ProceedsFromPurchasingCard

dal:ProceedsFromPurchasingCard


Proceeds
Period End2020-12-312020-09-302020-06-302020-03-31
Value0.0261-261.0364
Percentage of ProceedsFromPurchasingCard0.0100.0100.0100.0

dal:ProceedsFromSettlementOfInterestRateSwapContracts us-gaap:SubsequentEventType

dal:ProceedsFromSettlementOfInterestRateSwapContracts

us-gaap:SubsequentEvent


Proceeds
Period End2021-01-31
Value20
Percentage of ProceedsFromSettlementOfInterestRateSwapContracts100.0

dal:ReductionInPlannedCapitalExpenditures

dal:ReductionInPlannedCapitalExpenditures


Reduction
Period End2020-12-31
Value-500.0
Percentage of ReductionInPlannedCapitalExpenditures100.0

dal:ReliefReceivedThroughPayrollSupportProgramCARESAct

dal:ReliefReceivedThroughPayrollSupportProgramCARESAct


Relief
Period End2020-12-312020-09-30
Value0.0157
Percentage of ReliefReceivedThroughPayrollSupportProgramCARESAct0.0100.0

dal:SalesOfMileageCredits

dal:SalesOfMileageCredits


Sales
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value1040760600700508992110011001020980900900859841900800743757
Percentage of SalesOfMileageCredits100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

dal:StockholdersEquityIncreaseDecreaseFromCommonStockIssuedAndCompensationExpenseFromEquityAwardsNetOfTreasurySharesWithheldForTaxesValue

dal:StockholdersEquityIncreaseDecreaseFromCommonStockIssuedAndCompensationExpenseFromEquityAwardsNetOfTreasurySharesWithheldForTaxesValue


Stockholders
Period End2020-09-302020-06-302020-03-312019-09-302019-06-302019-03-31
Value3437-5.03529-8.0
Percentage of StockholdersEquityIncreaseDecreaseFromCommonStockIssuedAndCompensationExpenseFromEquityAwardsNetOfTreasurySharesWithheldForTaxesValue100.0100.0100.0100.0100.0100.0

dal:StockholdersEquityIncreaseDecreaseFromCommonStockIssuedAndCompensationExpenseFromEquityAwardsNetOfTreasurySharesWithheldForTaxesValue us-gaap:StatementEquityComponents

us-gaap:AdditionalPaidInCapital


Stockholders
Period End2020-09-302020-06-302020-03-312019-09-302019-06-302019-03-31
Value353829363127
Percentage of StockholdersEquityIncreaseDecreaseFromCommonStockIssuedAndCompensationExpenseFromEquityAwardsNetOfTreasurySharesWithheldForTaxesValue102.9102.7-580.0102.9106.9-337.5

us-gaap:TreasuryStock


Stockholders
Period End2020-09-302020-06-302020-03-312019-09-302019-06-302019-03-31
Value-1.0-1.0-34.0-1.0-2.0-35.0
Percentage of StockholdersEquityIncreaseDecreaseFromCommonStockIssuedAndCompensationExpenseFromEquityAwardsNetOfTreasurySharesWithheldForTaxesValue-2.9-2.7680.0-2.9-6.9437.5

dal:SupportReceivedThroughPayrollSupportProgram us-gaap:SubsequentEventType

dal:SupportReceivedThroughPayrollSupportProgram

us-gaap:SubsequentEvent


Support
Period End2021-01-15
Value1400
Percentage of SupportReceivedThroughPayrollSupportProgram100.0

dal:UnsecuredLoansAsPercentageOfTotalPaymentsReceivedThroughPayrollSupportProgram us-gaap:SubsequentEventType

dal:UnsecuredLoansAsPercentageOfTotalPaymentsReceivedThroughPayrollSupportProgram

us-gaap:SubsequentEvent


Unsecured
Period End2021-01-15
Value30.0
Percentage of UnsecuredLoansAsPercentageOfTotalPaymentsReceivedThroughPayrollSupportProgram100.0

dal:WeightedAveragePricePerTreasuryShareWithheldForTaxes

dal:WeightedAveragePricePerTreasuryShareWithheldForTaxes


Weighted
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-31
Value46.2138.3528.2925.5656.4858.6855.0649.7552.5952.9955.08
Percentage of WeightedAveragePricePerTreasuryShareWithheldForTaxes100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

dal:YearOverYearDecreaseInSystemCapacityPercentage

dal:YearOverYearDecreaseInSystemCapacityPercentage


Year
Period End2020-09-302020-06-30
Value60.00.85
Percentage of YearOverYearDecreaseInSystemCapacityPercentage100.0100.0

dal:YearOverYearDecreaseInSystemCapacityPercentage us-gaap:AirlineDestinations

dal:InternationalDestination


Year
Period End2020-09-302020-06-30
Value80.00.94
Percentage of YearOverYearDecreaseInSystemCapacityPercentage133.3110.6

us-gaap:DomesticDestination


Year
Period End2020-09-302020-06-30
Value50.00.8
Percentage of YearOverYearDecreaseInSystemCapacityPercentage83.394.1

dal:YearOverYearDecreaseInSystemCapacityPercentage us-gaap:Range, us-gaap:StatementScenario

srt:Maximum, srt:ScenarioForecast


Year
Period End2021-03-312020-12-31
Value40.045.0
Percentage of YearOverYearDecreaseInSystemCapacityPercentage0.00.0

srt:Minimum, srt:ScenarioForecast


Year
Period End2021-03-312020-12-31
Value30.040.0
Percentage of YearOverYearDecreaseInSystemCapacityPercentage0.00.0

dal:YearOverYearDecreaseInSystemCapacityPercentage us-gaap:StatementScenario

srt:ScenarioForecast


Year
Period End2020-09-30
Value0.6
Percentage of YearOverYearDecreaseInSystemCapacityPercentage1.0

dal:YearOverYearDecreaseInSystemCapacityPercentage us-gaap:StatementScenario, us-gaap:AirlineDestinations

srt:ScenarioForecast, dal:InternationalDestination


Year
Period End2020-09-30
Value0.8
Percentage of YearOverYearDecreaseInSystemCapacityPercentage1.3

srt:ScenarioForecast, us-gaap:DomesticDestination


Year
Period End2020-09-30
Value0.5
Percentage of YearOverYearDecreaseInSystemCapacityPercentage0.8

us-gaap:AdjustmentsToAdditionalPaidInCapitalWarrantIssued

us-gaap:AdjustmentsToAdditionalPaidInCapitalWarrantIssued


Adjustments
Period End2021-06-302021-03-312020-09-302020-06-30
Value424414100
Percentage of AdjustmentsToAdditionalPaidInCapitalWarrantIssued100.0100.0100.0100.0

us-gaap:AdjustmentsToAdditionalPaidInCapitalWarrantIssued dal:PayrollSupportProgram, us-gaap:ClassOfWarrantOrRight

dal:PayrollSupportProgram3, dal:DeltaCommonStockWarrants2021PSP3


Adjustments
Period End2021-06-30
Value34
Percentage of AdjustmentsToAdditionalPaidInCapitalWarrantIssued81.0

us-gaap:AdjustmentsToAdditionalPaidInCapitalWarrantIssued us-gaap:ClassOfWarrantOrRight

dal:DeltaCommonStockWarrants2021PSP2


Adjustments
Period End2021-03-31
Value44
Percentage of AdjustmentsToAdditionalPaidInCapitalWarrantIssued100.0

us-gaap:AdjustmentsToAdditionalPaidInCapitalWarrantIssued us-gaap:StatementEquityComponents

us-gaap:AdditionalPaidInCapital


Adjustments
Period End2021-06-302021-03-312020-12-312020-09-302020-06-30
Value42440.014100
Percentage of AdjustmentsToAdditionalPaidInCapitalWarrantIssued100.0100.00.0100.0100.0

us-gaap:AircraftMaintenanceMaterialsAndRepairs

us-gaap:AircraftMaintenanceMaterialsAndRepairs


Aircraft
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-30
Value28729420410643469417424434476342371427435496503475518466462446449418479499452474440466448415474472491353493548561367428485485395405395
Percentage of AircraftMaintenanceMaterialsAndRepairs100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:AircraftRental

us-gaap:AircraftRental


Aircraft
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-30
Value1041041049996100105110107102103999794928986848172666667636060616556514747556064656875747274788292101
Percentage of AircraftRental100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:AirlineCapacityPurchaseArrangements

us-gaap:AirlineCapacityPurchaseArrangements


Airline
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-30
Value403401591488497902886900905893795903883856115611561081111010901119109610061018107310971053120413531361131913671459144413991409144714161375132814321410130011801236972
Percentage of AirlineCapacityPurchaseArrangements100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ContractWithCustomerLiabilityRevenueRecognized

us-gaap:ContractWithCustomerLiabilityRevenueRecognized


Contract
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-31
Value5788221001001002800
Percentage of ContractWithCustomerLiabilityRevenueRecognized100.0100.0100.0100.0100.0100.0

us-gaap:CostOfServicesCatering

us-gaap:CostOfServicesCatering


Cost
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-31
Value175118908888257313345322271286329300263261315271220233264221189208247227190195227215173
Percentage of CostOfServicesCatering100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DefinedBenefitPlanAmortizationOfGainsLosses us-gaap:RetirementPlanType

us-gaap:DefinedBenefitPlanAmortizationOfGainsLosses

us-gaap:OtherPostretirementBenefitPlansDefinedBenefit


Defined
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-31
Value-15.0-15.0-12.0-10.0-10.0-10.0-8.0-9.0-9.0-9.0
Percentage of DefinedBenefitPlanAmortizationOfGainsLosses100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:PensionPlansDefinedBenefit


Defined
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-31
Value-88.0-89.0-77.0-74.0-74.0-75.0-72.0-73.0-72.0-73.0
Percentage of DefinedBenefitPlanAmortizationOfGainsLosses586.7593.3641.7740.0740.0750.0900.0811.1800.0811.1

us-gaap:DefinedBenefitPlanAmortizationOfPriorServiceCostCredit us-gaap:RetirementPlanType

us-gaap:DefinedBenefitPlanAmortizationOfPriorServiceCostCredit

us-gaap:OtherPostretirementBenefitPlansDefinedBenefit


Defined
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-30
Value-2.0-2.0-2.0-2.0-2.0-2.0-2.0-2.0-2.0-2.0-4.0-7.0-7.0-7.0-5.0-7.0-7.0-7.0-5.0-7.0
Percentage of DefinedBenefitPlanAmortizationOfPriorServiceCostCredit100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DefinedBenefitPlanContributionsByEmployer us-gaap:RetirementPlanType

us-gaap:DefinedBenefitPlanContributionsByEmployer

us-gaap:PensionPlansDefinedBenefit


Defined
Period End2021-06-30
Value1500
Percentage of DefinedBenefitPlanContributionsByEmployer100.0

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

us-gaap:PensionPlansDefinedBenefit, us-gaap:SubsequentEvent


Defined
Period End2021-04-15
Value1000
Percentage of DefinedBenefitPlanContributionsByEmployer0.0

us-gaap:DefinedBenefitPlanCostOfProvidingSpecialOrContractualTerminationBenefitRecognizedDuringPeriod us-gaap:RestructuringCostAndReserve, us-gaap:RestructuringPlan

us-gaap:DefinedBenefitPlanCostOfProvidingSpecialOrContractualTerminationBenefitRecognizedDuringPeriod

us-gaap:SpecialTerminationBenefits, dal:VoluntaryEarlyRetirementAndSeparationProgram


Defined
Period End2020-09-30
Value1300
Percentage of DefinedBenefitPlanCostOfProvidingSpecialOrContractualTerminationBenefitRecognizedDuringPeriod100.0

us-gaap:DefinedBenefitPlanCostOfProvidingSpecialOrContractualTerminationBenefitRecognizedDuringPeriod us-gaap:RetirementPlanType

us-gaap:OtherPostretirementBenefitPlansDefinedBenefit


Defined
Period End2020-12-312020-09-30
Value0.01260
Percentage of DefinedBenefitPlanCostOfProvidingSpecialOrContractualTerminationBenefitRecognizedDuringPeriod0.096.9

us-gaap:DefinedBenefitPlanExpectedReturnOnPlanAssets us-gaap:RetirementPlanType

us-gaap:DefinedBenefitPlanExpectedReturnOnPlanAssets

us-gaap:OtherPostretirementBenefitPlansDefinedBenefit


Defined
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-30
Value9.09.0111111111112121217171717181717172018
Percentage of DefinedBenefitPlanExpectedReturnOnPlanAssets100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:PensionPlansDefinedBenefit


Defined
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-30
Value381375343343343343296297296297330329329329285286286286224226
Percentage of DefinedBenefitPlanExpectedReturnOnPlanAssets4233.34166.73118.23118.23118.23118.22690.92475.02466.72475.01941.21935.31935.31935.31583.31682.41682.41682.41120.01255.6

us-gaap:DefinedBenefitPlanInterestCost us-gaap:RetirementPlanType

us-gaap:DefinedBenefitPlanInterestCost

us-gaap:OtherPostretirementBenefitPlansDefinedBenefit


Defined
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-30
Value2929343028283534343431323232333535353637
Percentage of DefinedBenefitPlanInterestCost100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:PensionPlansDefinedBenefit


Defined
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-30
Value146146174175175175208208208208195195195195214213213213230229
Percentage of DefinedBenefitPlanInterestCost503.4503.4511.8583.3625.0625.0594.3611.8611.8611.8629.0609.4609.4609.4648.5608.6608.6608.6638.9618.9

us-gaap:DefinedBenefitPlanNetPeriodicBenefitCost us-gaap:RetirementPlanType

us-gaap:DefinedBenefitPlanNetPeriodicBenefitCost

us-gaap:OtherPostretirementBenefitPlansDefinedBenefit


Defined
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-30
Value5454571311494950505050-13.0393939394141413435
Percentage of DefinedBenefitPlanNetPeriodicBenefitCost100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:PensionPlansDefinedBenefit


Defined
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-30
Value-147.0-140.0-87.0-64.0-91.0-93.0-14.0-14.0-14.0-16.0-67.0-68.0-64.0-68.0-4.0-7.0-7.0-7.06562
Percentage of DefinedBenefitPlanNetPeriodicBenefitCost-272.2-259.3-152.6-4.9-185.7-189.8-28.0-28.0-28.0-32.0515.4-174.4-164.1-174.4-10.3-17.1-17.1-17.1191.2177.1

us-gaap:DefinedBenefitPlanRecognizedNetGainLossDueToSettlements1 us-gaap:RetirementPlanType

us-gaap:DefinedBenefitPlanRecognizedNetGainLossDueToSettlements1

us-gaap:PensionPlansDefinedBenefit


Defined
Period End2020-12-312020-09-302020-06-302019-12-312019-09-302019-06-302018-12-312018-09-302018-06-302017-12-312017-09-302017-06-30
Value-5000000.0-30000000.0-3000000.0-2000000.0-2000000.0-2000000.000-4000000.0-3000000.000
Percentage of DefinedBenefitPlanRecognizedNetGainLossDueToSettlements1100.0100.0100.0100.0100.0100.00.00.0100.0100.00.00.0

us-gaap:DefinedBenefitPlanServiceCost us-gaap:RetirementPlanType

us-gaap:DefinedBenefitPlanServiceCost

us-gaap:OtherPostretirementBenefitPlansDefinedBenefit


Defined
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-30
Value2121242424242021212121212121212222221717
Percentage of DefinedBenefitPlanServiceCost100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DefinedBenefitPlanSpecialTerminationBenefits us-gaap:RetirementPlanType

us-gaap:DefinedBenefitPlanSpecialTerminationBenefits

us-gaap:OtherPostretirementBenefitPlansDefinedBenefit


Defined
Period End2020-09-30
Value1300
Percentage of DefinedBenefitPlanSpecialTerminationBenefits100.0

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

us-gaap:DerivativeGainLossOnDerivativeNet

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


Derivative
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value-42.0-22.0-68.0216-36.03119-54.01377.0-94.02.0
Percentage of DerivativeGainLossOnDerivativeNet100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

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


Derivative
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value-11.0-21.0-7.019-15.018-3.0118.0-19.022-16.0
Percentage of DerivativeGainLossOnDerivativeNet26.295.510.38.841.758.1-15.8-20.45.8-271.4-23.4-800.0

us-gaap:DerivativeGainLossOnDerivativeNet us-gaap:HedgingDesignation

us-gaap:Nondesignated


Derivative
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value-53.0-43.0-75.0235-51.04916-43.0145-12.0-72.0-14.0
Percentage of DerivativeGainLossOnDerivativeNet126.2195.5110.3108.8141.7158.184.279.6105.8-171.476.6-700.0

us-gaap:DerivativeNonmonetaryNotionalAmountVolume us-gaap:DerivativeInstrumentRisk, us-gaap:HedgingDesignation

us-gaap:DerivativeNonmonetaryNotionalAmountVolume

us-gaap:EnergyRelatedDerivative, us-gaap:Nondesignated


Derivative
Period End2020-12-312020-09-302020-06-302020-03-31
Value-40.0-48.026219
Percentage of DerivativeNonmonetaryNotionalAmountVolume100.0100.0100.0100.0

us-gaap:EquitySecuritiesFvNiGainLoss

us-gaap:EquitySecuritiesFvNiGainLoss


Equity
Period End2021-06-302021-03-312020-06-302020-03-31
Value2112628.0-112.0
Percentage of EquitySecuritiesFvNiGainLoss100.0100.0100.0100.0

us-gaap:FuelCosts

us-gaap:FuelCosts


Fuel
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value1487101772348637215952011223922911978232724982341185615261519144812401256142212281227143318191457183540562952243422262222229125952289239122213305223320202881266321661928202319601683
Percentage of FuelCosts100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ImpairmentOfLongLivedAssetsToBeDisposedOf

us-gaap:ImpairmentOfLongLivedAssetsToBeDisposedOf


Impairment
Period End2020-12-31
Value-18.0
Percentage of ImpairmentOfLongLivedAssetsToBeDisposedOf100.0

us-gaap:ImpairmentOfLongLivedAssetsToBeDisposedOf us-gaap:AircraftType

dal:B767300ER


Impairment
Period End2020-09-302020-06-30
Value905180
Percentage of ImpairmentOfLongLivedAssetsToBeDisposedOf0.00.0

srt:B717


Impairment
Period End2020-09-30
Value950
Percentage of ImpairmentOfLongLivedAssetsToBeDisposedOf0.0

srt:CRJ200


Impairment
Period End2020-09-30
Value320
Percentage of ImpairmentOfLongLivedAssetsToBeDisposedOf0.0

us-gaap:IncrementalCommonSharesAttributableToShareBasedPaymentArrangements

us-gaap:IncrementalCommonSharesAttributableToShareBasedPaymentArrangements


Incremental
Period End2021-06-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-30
Value5000000.00002000000.02000000.02000000.01000000.02000000.02000000.02000000.003000000.03000000.03000000.004000000.05000000.06000000.0-1000000.07000000.08000000.08000000.009000000.09000000.09000000.01000000.010000000.09000000.07000000.01000000.04000000.004000000.006000000.06000000.001000000.07000000.08000000.0
Percentage of IncrementalCommonSharesAttributableToShareBasedPaymentArrangements100.00.00.00.0100.0100.0100.0100.0100.0100.0100.00.0100.0100.0100.00.0100.0100.0100.0100.0100.0100.0100.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0100.00.0100.0100.00.0100.0100.0100.0

us-gaap:LaborAndRelatedExpense

us-gaap:LaborAndRelatedExpense


Labor
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value2328220219401956208627712950288427522639273927532668258426322715261624732869246323912311221322762195209220362069204619691911197619221911182818501825176317111717173917271708166917021672
Percentage of LaborAndRelatedExpense100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:LandingFeesAndOtherRentals

us-gaap:LandingFeesAndOtherRentals


Landing
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-30
Value460493323378350467441460442419461421407373384400379365367399376348329403388373353393355341350378359323324360347305306342320313313331324
Percentage of LandingFeesAndOtherRentals100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OtherComprehensiveIncomeLossBeforeReclassificationsNetOfTax

us-gaap:OtherComprehensiveIncomeLossBeforeReclassificationsNetOfTax


Other
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-31
Value-1167.0-87.0-19.021-407.0-15.09.0-2.0-25.025-23.0-4.010.0-2211.041-11.07.0
Percentage of OtherComprehensiveIncomeLossBeforeReclassificationsNetOfTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OtherComprehensiveIncomeLossBeforeReclassificationsNetOfTax us-gaap:StatementEquityComponents

dal:AccumulatedNetGainLossAndAdjustmentOther


Other
Period End2020-09-302020-06-302020-03-312019-09-302019-06-302019-03-31
Value9.0-13.0213.03.0-2.0
Percentage of OtherComprehensiveIncomeLossBeforeReclassificationsNetOfTax-10.368.4100.0-20.033.3100.0

us-gaap:AccumulatedDefinedBenefitPlansAdjustment


Other
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-31
Value-1167.0-96.0-6.00.0-410.0-18.06.00.0-307.0130.00.0-264.00.00.00.0-482.00.00.00.010.00.00.00.0-2267.00.00.00.0
Percentage of OtherComprehensiveIncomeLossBeforeReclassificationsNetOfTax100.0110.331.60.0100.7120.066.7-0.00.00.00.00.00.00.00.00.00.00.00.0-0.040.0-0.0-0.00.0102.50.0-0.00.0

us-gaap:OtherComprehensiveIncomeLossTax

us-gaap:OtherComprehensiveIncomeLossTax


Other
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-09-302011-06-302011-03-31
Value-353.0-35.01.03.0-131.0-4.03.0-1.0-94.05.03.0-2.0-36.010.0-1.0-5.02501.02220206.02.0130.00.00.00.00.00.00.00.00.00.00.0
Percentage of OtherComprehensiveIncomeLossTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:OtherCostAndExpenseOperating

us-gaap:OtherCostAndExpenseOperating


Other
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value330322219238196511454476413429418455437410656593533467481527485493393565548492495515408379360439365356359421396416363424412429434433403376
Percentage of OtherCostAndExpenseOperating100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:PaymentsForFlightEquipment

us-gaap:PaymentsForFlightEquipment


Payments
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-31
Value395132302-65.030629570548116710598715701272991799613697595468505880764640406726451483322343514841511238527311276917-308.0231195755-274.0302
Percentage of PaymentsForFlightEquipment100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:PaymentsForProceedsFromOtherInvestingActivities

us-gaap:PaymentsForProceedsFromOtherInvestingActivities


Payments
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value-90.0-168.0-11.031-42.0-65.0-26.0100-83.0-49.0-67.0-16.0-33.0-38.0-146.0-5.0-14.05410.0-22.0-14.0-5.0-4.0-4.0-14.0-3.010.0-21.03.0-40.04.03.0-50.029185.00.03226-8.0-4.0-4.03.0-21.0-32.038
Percentage of PaymentsForProceedsFromOtherInvestingActivities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:PaymentsForRestructuring us-gaap:Range, us-gaap:StatementScenario, us-gaap:RestructuringPlan

us-gaap:PaymentsForRestructuring

srt:Maximum, srt:ScenarioForecast, dal:VoluntaryEarlyRetirementAndSeparationProgram


Payments
Period End2020-09-30
Value600
Percentage of PaymentsForRestructuring100.0

srt:Minimum, srt:ScenarioForecast, dal:VoluntaryEarlyRetirementAndSeparationProgram


Payments
Period End2020-09-30
Value500
Percentage of PaymentsForRestructuring83.3

us-gaap:PaymentsForRestructuring us-gaap:RestructuringCostAndReserve, us-gaap:RestructuringPlan

dal:SeparationPaymentsAndHealthcareBenefits, dal:VoluntaryEarlyRetirementAndSeparationProgram


Payments
Period End2020-09-30
Value543
Percentage of PaymentsForRestructuring90.5

dal:UnpaidVacationAndOtherBenefits, dal:VoluntaryEarlyRetirementAndSeparationProgram


Payments
Period End2020-09-30
Value270
Percentage of PaymentsForRestructuring45.0

us-gaap:PaymentsToAcquireLongtermInvestments

us-gaap:PaymentsToAcquireLongtermInvestments


Payments
Period End2020-09-302020-06-302020-03-312019-09-302019-06-302019-03-31
Value0.00.0209981890.0
Percentage of PaymentsToAcquireLongtermInvestments0.00.0100.0100.0100.00.0

us-gaap:PaymentsToAcquireOtherProductiveAssets

us-gaap:PaymentsToAcquireOtherProductiveAssets


Payments
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value366306246198251308502396393301484397309274361328291207326175166107238156193135177135175100111120100120227150494-99.01373810666119933342
Percentage of PaymentsToAcquireOtherProductiveAssets100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:PaymentsToAcquireShortTermInvestments

us-gaap:PaymentsToAcquireShortTermInvestments


Payments
Period End2021-06-302021-03-312020-12-312020-09-302011-09-302010-09-30
Value2426316147003745240451
Percentage of PaymentsToAcquireShortTermInvestments100.0100.0100.0100.0100.0100.0

us-gaap:ProceedsFromIssuanceOfUnsecuredDebt dal:PayrollSupportProgram, us-gaap:DebtInstrument, us-gaap:LongtermDebtType

us-gaap:ProceedsFromIssuanceOfUnsecuredDebt

dal:PayrollSupportProgram3, dal:PayrollSupportProgramLoan3, us-gaap:UnsecuredDebt


Proceeds
Period End2021-06-30
Value891
Percentage of ProceedsFromIssuanceOfUnsecuredDebt100.0

us-gaap:ProceedsFromIssuanceOfUnsecuredDebt us-gaap:DebtInstrument, us-gaap:LongtermDebtType

dal:PayrollSupportProgramExtensionLoan, us-gaap:UnsecuredDebt


Proceeds
Period End2021-03-31
Value828
Percentage of ProceedsFromIssuanceOfUnsecuredDebt0.0

us-gaap:ProceedsFromPaymentsForOtherFinancingActivities

us-gaap:ProceedsFromPaymentsForOtherFinancingActivities


Proceeds
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value5061-25.0-142.0-13.0-22.0-13.09.0-1.0-16.0-6.06.0544.0210-62.0-57.0-21.0777.0-34.08.0-121.09331-30.013-1.012-5.087-9.04.0-4.0321335-32.0-15.0178.0-8.076-9.03.01.0
Percentage of ProceedsFromPaymentsForOtherFinancingActivities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ProceedsFromSaleMaturityAndCollectionOfShorttermInvestments

us-gaap:ProceedsFromSaleMaturityAndCollectionOfShorttermInvestments


Proceeds
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-31
Value31233371395430006540.00.00.00.0206
Percentage of ProceedsFromSaleMaturityAndCollectionOfShorttermInvestments100.0100.0100.0100.0100.00.00.00.00.0100.0

us-gaap:ProceedsFromShortTermDebt

us-gaap:ProceedsFromShortTermDebt


Proceeds
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-03-312016-12-312016-09-302016-06-302016-03-312015-09-302015-06-302015-03-31
Value0.00.037928820.00.00.017507.00.00.00.00.01430.00.0680.00.00.0
Percentage of ProceedsFromShortTermDebt0.00.0100.0100.00.00.00.0100.0100.00.00.00.00.0100.00.00.0100.00.00.00.0

us-gaap:ProfessionalAndContractServicesExpense

us-gaap:ProfessionalAndContractServicesExpense


Professional
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-30
Value570519380379344675667685657632529562540544557561543523511520484476473477457441423459440427426429409401389402397378383419415425393398
Percentage of ProfessionalAndContractServicesExpense100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ReclassificationFromAccumulatedOtherComprehensiveIncomeCurrentPeriodNetOfTax

us-gaap:ReclassificationFromAccumulatedOtherComprehensiveIncomeCurrentPeriodNetOfTax


Reclassification
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-30
Value-78.0-78.0-68.0-85.020-70.0-63.0-64.0-63.0-61.0-21.0-16.05.0-10.0-7.014-4.0-19.016-478.00.0
Percentage of ReclassificationFromAccumulatedOtherComprehensiveIncomeCurrentPeriodNetOfTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0

us-gaap:ReclassificationFromAccumulatedOtherComprehensiveIncomeCurrentPeriodNetOfTax us-gaap:StatementEquityComponents

dal:AccumulatedNetGainLossAndAdjustmentOther


Reclassification
Period End2020-09-302020-06-302020-03-312019-09-302019-06-302019-03-31
Value0.0830.01.01.0-1.0
Percentage of ReclassificationFromAccumulatedOtherComprehensiveIncomeCurrentPeriodNetOfTax-0.0415.0-0.0-1.6-1.61.6

us-gaap:AccumulatedDefinedBenefitPlansAdjustment


Reclassification
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-31
Value-78.0-78.0-68.0-85.0-63.0-70.0-63.0-65.0-64.0-60.0-17.0-53.0-60.0-51.0-44.0-39.0-42.0-41.0-11.0-39.0-36.0-36.0-39.0-39.0-36.0-39.0-25.0-18.0-18.0-12.0
Percentage of ReclassificationFromAccumulatedOtherComprehensiveIncomeCurrentPeriodNetOfTax100.0100.0100.0100.0-315.0100.0100.0101.6101.698.40.00.00.00.00.00.00.00.00.00.00.0171.4243.8-780.0360.0557.1-178.6450.094.7-75.0

us-gaap:ReclassificationFromAociCurrentPeriodTax

us-gaap:ReclassificationFromAociCurrentPeriodTax


Reclassification
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312015-12-312015-09-302014-09-30
Value2423-20.0-26.0-102.0-21.0-19.0-19.0-19.0-19.0-6.0-16.0-20.0-15.0-27.0-23.0-23.0-17.0-6.0-23.0-3.02.0
Percentage of ReclassificationFromAociCurrentPeriodTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:RepaymentsOfLongTermDebtAndCapitalSecurities

us-gaap:RepaymentsOfLongTermDebtAndCapitalSecurities


Repayments
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-31
Value135817756241606474123851535511651285311648184924443925527628830625469045940715173333014431008106541249334732229914546691108-367.074610322854-460.0
Percentage of RepaymentsOfLongTermDebtAndCapitalSecurities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:RepaymentsOfLongTermLinesOfCredit us-gaap:LongtermDebtType

us-gaap:RepaymentsOfLongTermLinesOfCredit

us-gaap:RevolvingCreditFacility


Repayments
Period End2020-09-30
Value400
Percentage of RepaymentsOfLongTermLinesOfCredit100.0

us-gaap:RepaymentsOfLongTermLinesOfCredit us-gaap:LongtermDebtType, us-gaap:SubsequentEventType

us-gaap:RevolvingCreditFacility, us-gaap:SubsequentEvent


Repayments
Period End2020-10-13
Value2600
Percentage of RepaymentsOfLongTermLinesOfCredit0.0

us-gaap:RepaymentsOfShortTermDebt us-gaap:DebtInstrument, us-gaap:ShortTermDebtType, us-gaap:SubsequentEventType

us-gaap:RepaymentsOfShortTermDebt

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


Repayments
Period End2020-10-13
Value3000
Percentage of RepaymentsOfShortTermDebt100.0

us-gaap:RestructuringCharges

us-gaap:RestructuringCharges


Restructuring
Period End2021-06-302020-12-312020-09-302020-06-302019-06-30
Value8.0421534524540.0
Percentage of RestructuringCharges100.0100.0100.0100.00.0

us-gaap:RestructuringCharges us-gaap:ConsolidationItems, us-gaap:StatementBusinessSegments

us-gaap:OperatingSegments, dal:Airline


Restructuring
Period End2021-06-302020-12-312020-09-302020-06-30
Value8.042153452454
Percentage of RestructuringCharges100.0100.0100.0100.0

us-gaap:RestructuringCharges us-gaap:RestructuringPlan

dal:VoluntaryEarlyRetirementAndSeparationProgram


Restructuring
Period End2020-09-30
Value3100
Percentage of RestructuringCharges58.0

us-gaap:RestructuringReserveAccrualAdjustment1

us-gaap:RestructuringReserveAccrualAdjustment1


Restructuring
Period End2021-03-31
Value-44.0
Percentage of RestructuringReserveAccrualAdjustment1100.0

us-gaap:RightOfUseAssetObtainedInExchangeForFinanceLeaseLiability

us-gaap:RightOfUseAssetObtainedInExchangeForFinanceLeaseLiability


Right
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-31
Value3064733413429184314611553.0
Percentage of RightOfUseAssetObtainedInExchangeForFinanceLeaseLiability100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:RightOfUseAssetObtainedInExchangeForOperatingLeaseLiability

us-gaap:RightOfUseAssetObtainedInExchangeForOperatingLeaseLiability


Right
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-31
Value2392015669338555.010283274
Percentage of RightOfUseAssetObtainedInExchangeForOperatingLeaseLiability100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:StockIssuedDuringPeriodSharesShareBasedCompensation us-gaap:StatementEquityComponents

us-gaap:StockIssuedDuringPeriodSharesShareBasedCompensation

us-gaap:CommonStock


Stock
Period End2021-06-302021-03-312020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-31
Value1.02.01.00.00.02.00.00.01.0
Percentage of StockIssuedDuringPeriodSharesShareBasedCompensation100.0100.0100.00.00.0100.00.00.0100.0

us-gaap:TreasuryStock


Stock
Period End2021-03-312020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-31
Value1.01.00.00.01.00.00.01.0
Percentage of StockIssuedDuringPeriodSharesShareBasedCompensation50.0100.00.00.050.00.00.0100.0

us-gaap:StockIssuedDuringPeriodValueShareBasedCompensation

us-gaap:StockIssuedDuringPeriodValueShareBasedCompensation


Stock
Period End2021-06-302021-03-312020-06-302020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-31
Value273.037-5.03529-8.03127-26.0
Percentage of StockIssuedDuringPeriodValueShareBasedCompensation100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:StockIssuedDuringPeriodValueShareBasedCompensation us-gaap:StatementEquityComponents

us-gaap:AdditionalPaidInCapital


Stock
Period End2021-06-302021-03-312020-06-302020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-31
Value28233829363127322910.0
Percentage of StockIssuedDuringPeriodValueShareBasedCompensation103.7766.7102.7-580.0102.9106.9-337.5103.2107.4-38.5

us-gaap:TreasuryStock


Stock
Period End2021-06-302021-03-312020-06-302020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-31
Value-1.0-20.0-1.0-34.0-1.0-2.0-35.0-1.0-2.0-36.0
Percentage of StockIssuedDuringPeriodValueShareBasedCompensation-3.7-666.7-2.7680.0-2.9-6.9437.5-3.2-7.4138.5

dal:AirlineRelatedInventoryAircraftPartsAndSuppliesNet

dal:AirlineRelatedInventoryAircraftPartsAndSuppliesNet


Airline
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302019-12-312018-12-31
Value364371355393494521463
Percentage of AirlineRelatedInventoryAircraftPartsAndSuppliesNet100.0100.0100.0100.0100.0100.0100.0

dal:CarryingAmountOfHedgedInstrumentsFairValueHedgeNet us-gaap:BalanceSheetLocation

dal:CarryingAmountOfHedgedInstrumentsFairValueHedgeNet

dal:CurrentMaturitiesOfDebtAndFinanceLeases


Carrying
Period End2020-12-312020-09-302020-06-302020-03-312019-12-31
Value-21.0-21.0-21.0-22.019
Percentage of CarryingAmountOfHedgedInstrumentsFairValueHedgeNet100.0100.0100.0100.0100.0

dal:DebtAndFinanceLeases


Carrying
Period End2020-12-312020-09-302020-06-302020-03-312019-12-31
Value726153471783
Percentage of CarryingAmountOfHedgedInstrumentsFairValueHedgeNet-342.9-290.5-252.4-213.69384.2

dal:CashCashEquivalentsShortTermInvestmentsAndAmountsAvailableUnderRevolvingCreditFacilities

dal:CashCashEquivalentsShortTermInvestmentsAndAmountsAvailableUnderRevolvingCreditFacilities


Cash
Period End2020-12-312020-09-30
Value1670021600
Percentage of CashCashEquivalentsShortTermInvestmentsAndAmountsAvailableUnderRevolvingCreditFacilities100.0100.0

dal:ClassOfWarrantOrRightSharesCalledByWarrantsAsPercentageOfOutstandingShares dal:PayrollSupportProgram, us-gaap:ClassOfWarrantOrRight

dal:ClassOfWarrantOrRightSharesCalledByWarrantsAsPercentageOfOutstandingShares

dal:PayrollSupportProgram, dal:DeltaCommonStockWarrantsPSP


Class
Period End2021-06-30
Value1.8
Percentage of ClassOfWarrantOrRightSharesCalledByWarrantsAsPercentageOfOutstandingShares100.0

dal:PayrollSupportProgram1, dal:DeltaCommonStockWarrants2020PSP1


Class
Period End2021-06-30
Value1.1
Percentage of ClassOfWarrantOrRightSharesCalledByWarrantsAsPercentageOfOutstandingShares61.1

dal:PayrollSupportProgram2, dal:DeltaCommonStockWarrants2021PSP2


Class
Period End2021-06-30
Value0.4
Percentage of ClassOfWarrantOrRightSharesCalledByWarrantsAsPercentageOfOutstandingShares22.2

dal:PayrollSupportProgram3, dal:DeltaCommonStockWarrants2021PSP3


Class
Period End2021-06-30
Value0.3
Percentage of ClassOfWarrantOrRightSharesCalledByWarrantsAsPercentageOfOutstandingShares16.7

dal:ClassOfWarrantOrRightSharesCalledByWarrantsAsPercentageOfOutstandingShares us-gaap:ClassOfWarrantOrRight

dal:DeltaCommonStockWarrants


Class
Period End2020-12-31
Value1.0
Percentage of ClassOfWarrantOrRightSharesCalledByWarrantsAsPercentageOfOutstandingShares0.0

dal:DeltaCommonStockWarrants2020PSP1


Class
Period End2021-03-31
Value1.1
Percentage of ClassOfWarrantOrRightSharesCalledByWarrantsAsPercentageOfOutstandingShares0.0

dal:DeltaCommonStockWarrants2021PSP2


Class
Period End2021-03-31
Value0.3
Percentage of ClassOfWarrantOrRightSharesCalledByWarrantsAsPercentageOfOutstandingShares0.0

dal:ClassOfWarrantOrRightSharesCalledByWarrantsAsPercentageOfOutstandingShares us-gaap:StatementScenario, us-gaap:ClassOfWarrantOrRight

srt:ScenarioForecast, dal:DeltaCommonStockWarrants2021


Class
Period End2021-03-31
Value0.5
Percentage of ClassOfWarrantOrRightSharesCalledByWarrantsAsPercentageOfOutstandingShares0.0

dal:ContractWithCustomerLiabilityTravelCreditsAsPercentageOfTotalLiability

dal:ContractWithCustomerLiabilityTravelCreditsAsPercentageOfTotalLiability


Contract
Period End2020-12-31
Value65.0
Percentage of ContractWithCustomerLiabilityTravelCreditsAsPercentageOfTotalLiability100.0

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

dal:DebtInstrumentLoanPerAgreementThroughPayrollSupportProgram

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


Debt
Period End2021-01-15
Value400
Percentage of DebtInstrumentLoanPerAgreementThroughPayrollSupportProgram100.0

dal:DebtInstrumentLoanPerAgreementThroughPayrollSupportProgram us-gaap:StatementScenario, us-gaap:DebtInstrument, us-gaap:LongtermDebtType

srt:ScenarioForecast, dal:PayrollSupportProgramLoan, us-gaap:UnsecuredDebt


Debt
Period End2021-03-31
Value830
Percentage of DebtInstrumentLoanPerAgreementThroughPayrollSupportProgram0.0

dal:DebtInstrumentUnamortizedDiscountPremiumAndDebtIssuanceCostsNetAfterYearFive

dal:DebtInstrumentUnamortizedDiscountPremiumAndDebtIssuanceCostsNetAfterYearFive


Debt
Period End2020-12-31
Value-8000000.0
Percentage of DebtInstrumentUnamortizedDiscountPremiumAndDebtIssuanceCostsNetAfterYearFive100.0

dal:DebtInstrumentUnamortizedDiscountPremiumAndDebtIssuanceCostsNetYearFive

dal:DebtInstrumentUnamortizedDiscountPremiumAndDebtIssuanceCostsNetYearFive


Debt
Period End2020-12-31
Value23
Percentage of DebtInstrumentUnamortizedDiscountPremiumAndDebtIssuanceCostsNetYearFive100.0

dal:DebtInstrumentUnamortizedDiscountPremiumAndDebtIssuanceCostsNetYearFour

dal:DebtInstrumentUnamortizedDiscountPremiumAndDebtIssuanceCostsNetYearFour


Debt
Period End2020-12-31
Value46
Percentage of DebtInstrumentUnamortizedDiscountPremiumAndDebtIssuanceCostsNetYearFour100.0

dal:DebtInstrumentUnamortizedDiscountPremiumAndDebtIssuanceCostsNetYearOne

dal:DebtInstrumentUnamortizedDiscountPremiumAndDebtIssuanceCostsNetYearOne


Debt
Period End2020-12-31
Value62
Percentage of DebtInstrumentUnamortizedDiscountPremiumAndDebtIssuanceCostsNetYearOne100.0

dal:DebtInstrumentUnamortizedDiscountPremiumAndDebtIssuanceCostsNetYearThree

dal:DebtInstrumentUnamortizedDiscountPremiumAndDebtIssuanceCostsNetYearThree


Debt
Period End2020-12-31
Value54
Percentage of DebtInstrumentUnamortizedDiscountPremiumAndDebtIssuanceCostsNetYearThree100.0

dal:DebtInstrumentUnamortizedDiscountPremiumAndDebtIssuanceCostsNetYearTwo

dal:DebtInstrumentUnamortizedDiscountPremiumAndDebtIssuanceCostsNetYearTwo


Debt
Period End2020-12-31
Value63
Percentage of DebtInstrumentUnamortizedDiscountPremiumAndDebtIssuanceCostsNetYearTwo100.0

dal:DebtLongTermAndShortTermCombinedAmountFairValue

dal:DebtLongTermAndShortTermCombinedAmountFairValue


Debt
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-31
Value29600295002980033900229001480010400
Percentage of DebtLongTermAndShortTermCombinedAmountFairValue100.0100.0100.0100.0100.0100.0100.0

dal:DebtLongTermAndShortTermCombinedAmountGross

dal:DebtLongTermAndShortTermCombinedAmountGross


Debt
Period End2020-09-302020-06-302020-03-312019-12-31
Value3390023582156859991
Percentage of DebtLongTermAndShortTermCombinedAmountGross100.0100.0100.0100.0

dal:DebtLongTermDebtCurrentAndShortTermDebt

dal:DebtLongTermDebtCurrentAndShortTermDebt


Debt
Period End2020-09-302020-06-302020-03-312019-12-31
Value4738495440902054
Percentage of DebtLongTermDebtCurrentAndShortTermDebt100.0100.0100.0100.0

dal:DeferredIncomeTaxExpenseBenefitInAccumulatedBalanceAndNotRecognizedUntilObligationFullyExtinguished

dal:DeferredIncomeTaxExpenseBenefitInAccumulatedBalanceAndNotRecognizedUntilObligationFullyExtinguished


Deferred
Period End2020-12-31
Value750
Percentage of DeferredIncomeTaxExpenseBenefitInAccumulatedBalanceAndNotRecognizedUntilObligationFullyExtinguished100.0

dal:DeferredIncomeTaxExpenseBenefitInAccumulatedBalanceAndNotRecognizedUntilObligationFullyExtinguished us-gaap:StatementEquityComponents

us-gaap:AccumulatedDefinedBenefitPlansAdjustment


Deferred
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-09-30
Value750750755750750755
Percentage of DeferredIncomeTaxExpenseBenefitInAccumulatedBalanceAndNotRecognizedUntilObligationFullyExtinguished0.00.00.00.00.00.0

dal:DeferredTaxAssetsOperatingLeaseLiabilities

dal:DeferredTaxAssetsOperatingLeaseLiabilities


Deferred
Period End2020-12-312019-12-312018-12-312017-12-31
Value2185144615790.0
Percentage of DeferredTaxAssetsOperatingLeaseLiabilities100.0100.0100.00.0

dal:DeferredTaxLiabilitiesOperatingLeaseRightOfUseAssets

dal:DeferredTaxLiabilitiesOperatingLeaseRightOfUseAssets


Deferred
Period End2020-12-312019-12-312018-12-312017-12-31
Value1324129813880.0
Percentage of DeferredTaxLiabilitiesOperatingLeaseRightOfUseAssets100.0100.0100.00.0

dal:EquitySecuritiesAndEquityMethodInvestments

dal:EquitySecuritiesAndEquityMethodInvestments


Equity
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-31
Value2143192916651562163336842568
Percentage of EquitySecuritiesAndEquityMethodInvestments100.0100.0100.0100.0100.0100.0100.0

dal:EquitySecuritiesFVNIOwnershipPercentage dal:EquitySecuritiesInvestmentName

dal:EquitySecuritiesFVNIOwnershipPercentage

dal:AirFranceKLM


Equity
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312018-12-31
Value6.09.09.09.00.090.090.090.09
Percentage of EquitySecuritiesFVNIOwnershipPercentage100.0100.0100.0100.0100.0100.0100.0100.0

dal:ChinaEastern


Equity
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312018-12-31
Value3.03.03.03.00.030.030.030.03
Percentage of EquitySecuritiesFVNIOwnershipPercentage50.033.333.333.333.333.333.333.3

dal:HanjinKAL


Equity
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312018-12-31
Value13.013.013.015.00.150.150.10
Percentage of EquitySecuritiesFVNIOwnershipPercentage216.7144.4144.4166.7166.7166.7111.10.0

dal:LATAMAirlinesGroupSA


Equity
Period End2020-12-31
Value20.0
Percentage of EquitySecuritiesFVNIOwnershipPercentage222.2

dal:WheelsUp


Equity
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312020-01-312019-12-31
Value24.024.024.025.00.250.270.270
Percentage of EquitySecuritiesFVNIOwnershipPercentage400.0266.7266.7277.8277.8300.00.00.0

dal:GrantsDeferredCARESAct

dal:GrantsDeferredCARESAct


Grants
Period End2020-09-30
Value1300
Percentage of GrantsDeferredCARESAct100.0

dal:IndefiniteLivedIntangibleAssetPercentageOfFairValueInExcessOfCarryingAmount us-gaap:Range, us-gaap:IndefiniteLivedIntangibleAssetsByMajorClass

dal:IndefiniteLivedIntangibleAssetPercentageOfFairValueInExcessOfCarryingAmount

srt:Maximum, dal:InternationalRoutesAndSlots


Indefinite
Period End2020-12-312019-12-31
Value30.00.29
Percentage of IndefiniteLivedIntangibleAssetPercentageOfFairValueInExcessOfCarryingAmount100.0100.0

srt:Minimum, dal:AirlineAlliances


Indefinite
Period End2020-12-312019-12-31
Value20.00.67
Percentage of IndefiniteLivedIntangibleAssetPercentageOfFairValueInExcessOfCarryingAmount66.7231.0

srt:Minimum, dal:DomesticSlots


Indefinite
Period End2020-12-312019-12-31
Value60.00.61
Percentage of IndefiniteLivedIntangibleAssetPercentageOfFairValueInExcessOfCarryingAmount200.0210.3

srt:Minimum, dal:InternationalRoutesAndSlots


Indefinite
Period End2020-12-312019-12-31
Value10.00.15
Percentage of IndefiniteLivedIntangibleAssetPercentageOfFairValueInExcessOfCarryingAmount33.351.7

dal:IndefiniteLivedIntangibleAssetPercentageOfFairValueInExcessOfCarryingAmountGreaterThan us-gaap:IndefiniteLivedIntangibleAssetsByMajorClass

dal:IndefiniteLivedIntangibleAssetPercentageOfFairValueInExcessOfCarryingAmountGreaterThan

us-gaap:TradeNames


Indefinite
Period End2020-12-31
Value100.0
Percentage of IndefiniteLivedIntangibleAssetPercentageOfFairValueInExcessOfCarryingAmountGreaterThan100.0

dal:IndefiniteLivedIntangibleAssetPercentageOfFairValueInExcessOfCarryingAmountGreaterThan us-gaap:Range, us-gaap:IndefiniteLivedIntangibleAssetsByMajorClass

srt:Maximum, dal:AirlineAlliances


Indefinite
Period End2020-12-31
Value100.0
Percentage of IndefiniteLivedIntangibleAssetPercentageOfFairValueInExcessOfCarryingAmountGreaterThan100.0

srt:Maximum, dal:DomesticSlots


Indefinite
Period End2020-12-31
Value100.0
Percentage of IndefiniteLivedIntangibleAssetPercentageOfFairValueInExcessOfCarryingAmountGreaterThan100.0

dal:IndefiniteLivedIntangibleAssetsAndGoodwill

dal:IndefiniteLivedIntangibleAssetsAndGoodwill


Indefinite
Period End2020-12-312020-09-302020-06-302020-03-312019-12-31
Value1567115671156711567114841
Percentage of IndefiniteLivedIntangibleAssetsAndGoodwill100.0100.0100.0100.0100.0

dal:LeaseLiability

dal:LeaseLiability


Lease
Period End2020-12-312019-12-312018-12-31
Value757471497159
Percentage of LeaseLiability100.0100.0100.0

dal:LeaseRightOfUseAsset

dal:LeaseRightOfUseAsset


Lease
Period End2020-12-312019-12-31
Value67356689
Percentage of LeaseRightOfUseAsset100.0100.0

dal:LesseeFinanceLeaseAndOperatingLeaseLeaseNotYetCommencedAmount

dal:LesseeFinanceLeaseAndOperatingLeaseLeaseNotYetCommencedAmount


Lessee
Period End2021-06-302020-12-31
Value719734
Percentage of LesseeFinanceLeaseAndOperatingLeaseLeaseNotYetCommencedAmount100.0100.0

dal:LettersOfCreditOutstandingThatReduceAvailabilityUnderRevolvingFacilitiesAmount

dal:LettersOfCreditOutstandingThatReduceAvailabilityUnderRevolvingFacilitiesAmount


Letters
Period End2021-06-302021-03-312020-12-312020-09-30
Value300400300300
Percentage of LettersOfCreditOutstandingThatReduceAvailabilityUnderRevolvingFacilitiesAmount100.0100.0100.0100.0

dal:NetObligationRenewableFuelComplianceFairValue

dal:NetObligationRenewableFuelComplianceFairValue


Net
Period End2021-06-302020-06-30
Value52749
Percentage of NetObligationRenewableFuelComplianceFairValue100.0100.0

dal:NetObligationRenewableFuelComplianceFairValue us-gaap:ConsolidationItems, us-gaap:StatementBusinessSegments

us-gaap:OperatingSegments, dal:Refinery


Net
Period End2021-06-302020-06-30
Value52749
Percentage of NetObligationRenewableFuelComplianceFairValue100.0100.0

dal:NumberOfEmployeesTestedForCOVID19

dal:NumberOfEmployeesTestedForCOVID19


Number
Period End2020-09-30
Value40000.0
Percentage of NumberOfEmployeesTestedForCOVID19100.0

dal:ObligationRenewableFuelComplianceAssetComponentFairValue

dal:ObligationRenewableFuelComplianceAssetComponentFairValue


Obligation
Period End2021-06-302020-06-30
Value556.0
Percentage of ObligationRenewableFuelComplianceAssetComponentFairValue100.0100.0

dal:ObligationRenewableFuelComplianceLiabilityComponentFairValue

dal:ObligationRenewableFuelComplianceLiabilityComponentFairValue


Obligation
Period End2021-06-302020-06-30
Value58155
Percentage of ObligationRenewableFuelComplianceLiabilityComponentFairValue100.0100.0

dal:PercentageOfEmployeesRepresentedByUnionsUnderCollectiveBargainingAgreements

dal:PercentageOfEmployeesRepresentedByUnionsUnderCollectiveBargainingAgreements


Percentage
Period End2020-12-31
Value23.0
Percentage of PercentageOfEmployeesRepresentedByUnionsUnderCollectiveBargainingAgreements100.0

dal:RedevelopmentProjectMaximumReimbursementByCounterparty us-gaap:CounterpartyName, us-gaap:OtherCommitments

dal:RedevelopmentProjectMaximumReimbursementByCounterparty

dal:CityOfLosAngelesCalifornia, dal:LosAngelesInternationalAirportProject


Redevelopment
Period End2020-12-31
Value1800
Percentage of RedevelopmentProjectMaximumReimbursementByCounterparty100.0

dal:RedevelopmentProjectNetProjectCostsExpected us-gaap:OtherCommitments

dal:RedevelopmentProjectNetProjectCostsExpected

dal:LosAngelesInternationalAirportProject


Redevelopment
Period End2020-12-31
Value500
Percentage of RedevelopmentProjectNetProjectCostsExpected100.0

dal:NewYorkLaGuardiaRedevelopmentProject


Redevelopment
Period End2020-12-31
Value3500
Percentage of RedevelopmentProjectNetProjectCostsExpected700.0

dal:RedevelopmentProjectTotalAppropriationToDateByCounterparty us-gaap:CounterpartyName, us-gaap:OtherCommitments

dal:RedevelopmentProjectTotalAppropriationToDateByCounterparty

dal:CityOfLosAngelesCalifornia, dal:LosAngelesInternationalAirportProject


Redevelopment
Period End2020-12-31
Value1800
Percentage of RedevelopmentProjectTotalAppropriationToDateByCounterparty100.0

dal:RedevelopmentProjectTotalProjectCostsExpected us-gaap:OtherCommitments

dal:RedevelopmentProjectTotalProjectCostsExpected

dal:LosAngelesInternationalAirportProject


Redevelopment
Period End2020-12-31
Value2300
Percentage of RedevelopmentProjectTotalProjectCostsExpected100.0

dal:ShortTermDebtLongTermDebtCurrentMaturitiesAndFinanceLeaseLiabilityCurrent

dal:ShortTermDebtLongTermDebtCurrentMaturitiesAndFinanceLeaseLiabilityCurrent


Short
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-31
Value2372298317325045523043372287
Percentage of ShortTermDebtLongTermDebtCurrentMaturitiesAndFinanceLeaseLiabilityCurrent100.0100.0100.0100.0100.0100.0100.0

dal:StrategicAlliancePlanEstimatedFutureDisbursementsToSupportEstablishmentOfAlliance

dal:StrategicAlliancePlanEstimatedFutureDisbursementsToSupportEstablishmentOfAlliance


Strategic
Period End2020-09-30
Value75
Percentage of StrategicAlliancePlanEstimatedFutureDisbursementsToSupportEstablishmentOfAlliance100.0

dal:UnrecordedUnconditionalPurchaseObligationDueAfterFourYears us-gaap:UnrecordedUnconditionalPurchaseObligationByCategoryOfItemPurchased

dal:UnrecordedUnconditionalPurchaseObligationDueAfterFourYears

us-gaap:CapitalAdditions


Unrecorded
Period End2021-06-302021-03-312020-09-30
Value222021104810
Percentage of UnrecordedUnconditionalPurchaseObligationDueAfterFourYears100.0100.0100.0

dei:EntityNumberOfEmployees

dei:EntityNumberOfEmployees


Entity
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312011-12-31
Value74000.091000.089000.087000.084000.083000.078400.0
Percentage of EntityNumberOfEmployees100.0100.0100.0100.0100.0100.0100.0

dei:EntityNumberOfEmployees dal:Employeegroups

dal:DeltaFlightSuperintendentsDispatchersRepresentedbyUnions


Entity
Period End2020-12-312019-12-312018-12-312017-12-31
Value350.0443.0432.0420.0
Percentage of EntityNumberOfEmployees0.50.50.50.5

dal:DeltaPilotsRepresentedbyUnions


Entity
Period End2020-12-312019-12-312018-12-312017-12-31
Value12940.013082.013203.013234.0
Percentage of EntityNumberOfEmployees17.514.414.815.2

dal:EndeavorFlightAttendantsRepresentedbyUnions


Entity
Period End2020-12-312019-12-312018-12-312017-12-31
Value1480.01492.01307.01160.0
Percentage of EntityNumberOfEmployees2.01.61.51.3

dal:EndeavorPilotsRepresentedbyUnions


Entity
Period End2020-12-312019-12-312018-12-312017-12-31
Value1900.01872.01976.01805.0
Percentage of EntityNumberOfEmployees2.62.12.22.1

dal:MonroeRefineryEmployeesRepresentedByUnitedSteelWorkers


Entity
Period End2020-12-312019-12-31
Value190.0199.0
Percentage of EntityNumberOfEmployees0.30.2

us-gaap:AirlineRelatedInventoryAircraftFuel

us-gaap:AirlineRelatedInventoryAircraftFuel


Airline
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302019-12-312018-12-31
Value641457377353353730592
Percentage of AirlineRelatedInventoryAircraftFuel100.0100.0100.0100.0100.0100.0100.0

us-gaap:AirlineRelatedInventoryValuationReserves

us-gaap:AirlineRelatedInventoryValuationReserves


Airline
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302010-12-31
Value1781761882081359082949697102125122119113124119114110108103114114124120119127113124122-118.012612513312712211210610196104104
Percentage of AirlineRelatedInventoryValuationReserves100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:AllowanceForDoubtfulAccountsReceivable us-gaap:FinancingReceivableRecordedInvestmentByClassOfFinancingReceivable

us-gaap:AllowanceForDoubtfulAccountsReceivable

dal:InvesteeAndOtherAirlinesReceivable


Allowance
Period End2020-12-31
Value100
Percentage of AllowanceForDoubtfulAccountsReceivable100.0

dal:InvesteeReceivable


Allowance
Period End2020-09-30
Value156
Percentage of AllowanceForDoubtfulAccountsReceivable0.0

us-gaap:AllowanceForDoubtfulAccountsReceivableCurrent

us-gaap:AllowanceForDoubtfulAccountsReceivableCurrent


Allowance
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312009-12-31
Value80758912312116131414141212131312121111151311119.09.010.09.021202423-23.023222236363743333939324047
Percentage of AllowanceForDoubtfulAccountsReceivableCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:AlternativeInvestment us-gaap:FairValueByFairValueHierarchyLevel

us-gaap:AlternativeInvestment

us-gaap:FairValueMeasuredAtNetAssetValuePerShare


Alternative
Period End2020-12-312019-12-312018-12-31
Value1042798549136
Percentage of AlternativeInvestment100.0100.0100.0

us-gaap:AlternativeInvestment us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:InvestmentType

us-gaap:FairValueMeasuredAtNetAssetValuePerShare, dal:OtherCommingledFunds


Alternative
Period End2020-12-312019-12-312018-12-31
Value1028716705
Percentage of AlternativeInvestment9.97.37.7

us-gaap:FairValueMeasuredAtNetAssetValuePerShare, dal:RealAssets


Alternative
Period End2020-12-312019-12-312018-12-31
Value671758807
Percentage of AlternativeInvestment6.47.78.8

us-gaap:FairValueMeasuredAtNetAssetValuePerShare, us-gaap:DebtSecurities


Alternative
Period End2020-12-312019-12-312018-12-31
Value1118958769
Percentage of AlternativeInvestment10.79.78.4

us-gaap:FairValueMeasuredAtNetAssetValuePerShare, us-gaap:EquitySecurities


Alternative
Period End2020-12-312019-12-312018-12-31
Value213618341591
Percentage of AlternativeInvestment20.518.617.4

us-gaap:FairValueMeasuredAtNetAssetValuePerShare, us-gaap:HedgeFunds


Alternative
Period End2020-12-312019-12-312018-12-31
Value547455885264
Percentage of AlternativeInvestment52.556.757.6

us-gaap:AociTaxAttributableToParent us-gaap:StatementEquityComponents

us-gaap:AociTaxAttributableToParent

us-gaap:AccumulatedOtherComprehensiveIncome


Aoci
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302018-12-312017-12-312016-12-31
Value-1717000000.0-1741000000.0-1764000000.0-1431000000.0-1431000000.0-1531000000.0-1549000000.0-1437000000.0-1492000000.0-1400000000.0-1458000000.0
Percentage of AociTaxAttributableToParent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:AvailableForSaleSecuritiesDebtMaturitiesWithinOneYearFairValue

us-gaap:AvailableForSaleSecuritiesDebtMaturitiesWithinOneYearFairValue


Available
Period End2021-06-302021-03-312020-12-312020-09-30
Value4200470049004400
Percentage of AvailableForSaleSecuritiesDebtMaturitiesWithinOneYearFairValue100.0100.0100.0100.0

us-gaap:AvailableForSaleSecuritiesDebtSecurities us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FairValueByMeasurementFrequency

us-gaap:AvailableForSaleSecuritiesDebtSecurities

us-gaap:FairValueInputsLevel1, us-gaap:FairValueMeasurementsRecurring


Available
Period End2021-06-302021-03-312020-12-31
Value280735643919
Percentage of AvailableForSaleSecuritiesDebtSecurities100.0100.0100.0

us-gaap:FairValueInputsLevel2, us-gaap:FairValueMeasurementsRecurring


Available
Period End2021-06-302021-03-312020-12-31
Value206620111870
Percentage of AvailableForSaleSecuritiesDebtSecurities73.656.447.7

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

us-gaap:FairValueInputsLevel1, us-gaap:FairValueMeasurementsRecurring, us-gaap:USTreasuryAndGovernment


Available
Period End2020-12-312020-09-302020-06-302018-12-312018-09-302018-06-302017-12-31
Value39193694424445455884
Percentage of AvailableForSaleSecuritiesDebtSecurities100.00.00.00.00.00.00.0

us-gaap:FairValueInputsLevel2, us-gaap:FairValueMeasurementsRecurring, us-gaap:USTreasuryAndGovernment


Available
Period End2020-12-312020-09-302020-06-302018-12-312018-09-302018-06-302017-12-31
Value18701354585.05.06.09.0
Percentage of AvailableForSaleSecuritiesDebtSecurities47.70.00.00.00.00.00.0

us-gaap:AvailableForSaleSecuritiesDebtSecurities us-gaap:FairValueByMeasurementFrequency

us-gaap:FairValueMeasurementsRecurring


Available
Period End2021-06-302021-03-312020-12-31
Value487355755789
Percentage of AvailableForSaleSecuritiesDebtSecurities173.6156.4147.7

us-gaap:AvailableForSaleSecuritiesDebtSecurities us-gaap:FairValueByMeasurementFrequency, us-gaap:FinancialInstrument

us-gaap:FairValueMeasurementsRecurring, us-gaap:USTreasuryAndGovernment


Available
Period End2020-12-312020-09-302020-06-302018-12-312018-09-302018-06-302017-12-31
Value57895048430250506493
Percentage of AvailableForSaleSecuritiesDebtSecurities147.70.00.00.00.00.00.0

us-gaap:CapitalizedComputerSoftwareNet

us-gaap:CapitalizedComputerSoftwareNet


Capitalized
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-312010-12-312009-12-31
Value10001100819659549420411383344200153126
Percentage of CapitalizedComputerSoftwareNet100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:CashAndCashEquivalentsFairValueDisclosure us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FairValueByMeasurementFrequency

us-gaap:CashAndCashEquivalentsFairValueDisclosure

us-gaap:FairValueInputsLevel1, us-gaap:FairValueMeasurementsRecurring


Cash
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302016-12-31
Value78876004575513554822546695861489164815081222982144587613571692279
Percentage of CashAndCashEquivalentsFairValueDisclosure100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:CashAndCashEquivalentsFairValueDisclosure us-gaap:FairValueByMeasurementFrequency

us-gaap:FairValueMeasurementsRecurring


Cash
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302016-12-31
Value78876004575513554822546695861489164815081222982144587613571692279
Percentage of CashAndCashEquivalentsFairValueDisclosure100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ClassOfWarrantOrRightExercisePriceOfWarrantsOrRights1 dal:PayrollSupportProgram, us-gaap:ClassOfWarrantOrRight

us-gaap:ClassOfWarrantOrRightExercisePriceOfWarrantsOrRights1

dal:PayrollSupportProgram2, dal:DeltaCommonStockWarrants2021PSP2


Class
Period End2021-06-30
Value39.73
Percentage of ClassOfWarrantOrRightExercisePriceOfWarrantsOrRights1100.0

dal:PayrollSupportProgram3, dal:DeltaCommonStockWarrants2021PSP3


Class
Period End2021-06-30
Value47.8
Percentage of ClassOfWarrantOrRightExercisePriceOfWarrantsOrRights1120.3

us-gaap:ClassOfWarrantOrRightExercisePriceOfWarrantsOrRights1 us-gaap:ClassOfWarrantOrRight

dal:DeltaCommonStockWarrants2021PSP2


Class
Period End2021-03-31
Value39.73
Percentage of ClassOfWarrantOrRightExercisePriceOfWarrantsOrRights10.0

us-gaap:ClassOfWarrantOrRightExercisePriceOfWarrantsOrRights1 us-gaap:StatementScenario, us-gaap:ClassOfWarrantOrRight

srt:ScenarioForecast, dal:DeltaCommonStockWarrants2021


Class
Period End2021-03-31
Value39.73
Percentage of ClassOfWarrantOrRightExercisePriceOfWarrantsOrRights10.0

us-gaap:ClassOfWarrantOrRightNumberOfSecuritiesCalledByWarrantsOrRights dal:PayrollSupportProgram, us-gaap:ClassOfWarrantOrRight

us-gaap:ClassOfWarrantOrRightNumberOfSecuritiesCalledByWarrantsOrRights

dal:PayrollSupportProgram, dal:DeltaCommonStockWarrantsPSP


Class
Period End2021-06-30
Value11
Percentage of ClassOfWarrantOrRightNumberOfSecuritiesCalledByWarrantsOrRights100.0

dal:PayrollSupportProgram1, dal:DeltaCommonStockWarrants2020PSP1


Class
Period End2021-06-30
Value6.8
Percentage of ClassOfWarrantOrRightNumberOfSecuritiesCalledByWarrantsOrRights61.3

dal:PayrollSupportProgram2, dal:DeltaCommonStockWarrants2021PSP2


Class
Period End2021-06-30
Value2.4
Percentage of ClassOfWarrantOrRightNumberOfSecuritiesCalledByWarrantsOrRights21.6

dal:PayrollSupportProgram3, dal:DeltaCommonStockWarrants2021PSP3


Class
Period End2021-06-30
Value1.9
Percentage of ClassOfWarrantOrRightNumberOfSecuritiesCalledByWarrantsOrRights17.1

us-gaap:ClassOfWarrantOrRightNumberOfSecuritiesCalledByWarrantsOrRights us-gaap:ClassOfWarrantOrRight

dal:DeltaCommonStockWarrants


Class
Period End2020-12-312020-09-302020-06-302020-04-30
Value6.76.75.96.5
Percentage of ClassOfWarrantOrRightNumberOfSecuritiesCalledByWarrantsOrRights0.00.00.00.0

dal:DeltaCommonStockWarrants2020PSP1


Class
Period End2020-12-31
Value6.8
Percentage of ClassOfWarrantOrRightNumberOfSecuritiesCalledByWarrantsOrRights0.0

dal:DeltaCommonStockWarrants2021PSP2


Class
Period End2021-03-31
Value2.1
Percentage of ClassOfWarrantOrRightNumberOfSecuritiesCalledByWarrantsOrRights0.0

us-gaap:ClassOfWarrantOrRightNumberOfSecuritiesCalledByWarrantsOrRights us-gaap:ClassOfWarrantOrRight, us-gaap:SubsequentEventType

dal:DeltaCommonStockWarrants2021, us-gaap:SubsequentEvent


Class
Period End2021-01-15
Value1.0
Percentage of ClassOfWarrantOrRightNumberOfSecuritiesCalledByWarrantsOrRights0.0

us-gaap:ClassOfWarrantOrRightNumberOfSecuritiesCalledByWarrantsOrRights us-gaap:StatementScenario, us-gaap:ClassOfWarrantOrRight

srt:ScenarioForecast, dal:DeltaCommonStockWarrants2021


Class
Period End2021-03-31
Value2.1
Percentage of ClassOfWarrantOrRightNumberOfSecuritiesCalledByWarrantsOrRights0.0

us-gaap:CommonStockCapitalSharesReservedForFutureIssuance

us-gaap:CommonStockCapitalSharesReservedForFutureIssuance


Common
Period End2020-12-31
Value21
Percentage of CommonStockCapitalSharesReservedForFutureIssuance100.0

us-gaap:ContractWithCustomerLiability us-gaap:ProductOrService

us-gaap:ContractWithCustomerLiability

dal:ProductAndServiceOtherLoyaltyProgram


Contract
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312016-12-31
Value7401728571827089698168176728669666546624664165426491639463215922
Percentage of ContractWithCustomerLiability100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ContractWithCustomerLiabilityNoncurrent us-gaap:ProductOrService

us-gaap:ContractWithCustomerLiabilityNoncurrent

dal:PassengerAirTraffic


Contract
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302019-12-31
Value1402505002393150.0
Percentage of ContractWithCustomerLiabilityNoncurrent100.0100.0100.0100.0100.00.0

dal:ProductAndServiceOtherLoyaltyProgram


Contract
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312017-12-31
Value464448465405580557865718350934963606361136523559
Percentage of ContractWithCustomerLiabilityNoncurrent3317.11938.41081.02428.91836.80.00.00.00.00.00.00.0

us-gaap:DebtInstrumentCarryingAmount

us-gaap:DebtInstrumentCarryingAmount


Debt
Period End2021-06-302021-03-312020-12-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312009-12-31
Value2752227699282149991887491711030793088864949183268539847386788887711274027609824380988474896392619469980410083109021122811820121551226712633125461294413367137971454314739152651544218068
Percentage of DebtInstrumentCarryingAmount100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DebtInstrumentCarryingAmount us-gaap:DebtInstrument, us-gaap:LongtermDebtType

dal:AircraftFinancings, us-gaap:SecuredDebt


Debt
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302017-12-31
Value12791350128410681146124311931246150716461787128116471961
Percentage of DebtInstrumentCarryingAmount4.64.94.60.00.00.011.914.016.416.019.214.517.423.0

dal:BankRevolvingCreditFacilities, us-gaap:RevolvingCreditFacility


Debt
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302017-12-31
Value2672702920.00.00.00.00.00.00.00.0
Percentage of DebtInstrumentCarryingAmount0.00.00.00.00.00.00.00.00.00.00.0

dal:Certificates, us-gaap:SecuredDebt


Debt
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302017-12-31
Value20092518263326862731261116691999203122761837201022072380
Percentage of DebtInstrumentCarryingAmount7.39.19.30.00.00.016.722.522.122.119.722.723.327.9

dal:NYTDCSpecialFacilitiesRevenueBondsSeries2018, us-gaap:Bonds


Debt
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302017-12-31
Value13831383138313831383138313831383138313831383138313830.0
Percentage of DebtInstrumentCarryingAmount5.05.04.90.00.00.013.815.615.113.414.915.614.60.0

dal:OtherFinancings, dal:SecuredAndUnsecuredDebt


Debt
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302017-12-31
Value594611412241214256196196200252251140204210
Percentage of DebtInstrumentCarryingAmount2.22.21.50.00.00.02.02.22.22.42.71.62.12.5

dal:PayrollSupportProgramExtensionLoan, us-gaap:UnsecuredDebt


Debt
Period End2021-06-302021-03-31
Value957828
Percentage of DebtInstrumentCarryingAmount3.53.0

dal:PayrollSupportProgramLoan3, us-gaap:UnsecuredDebt


Debt
Period End2021-06-30
Value891
Percentage of DebtInstrumentCarryingAmount3.2

dal:PayrollSupportProgramLoanCARESAct, us-gaap:UnsecuredDebt


Debt
Period End2020-12-312020-09-302020-06-302019-12-31
Value1648164814380.0
Percentage of DebtInstrumentCarryingAmount5.80.00.00.0

dal:RevolvingCreditFacility2018, us-gaap:RevolvingCreditFacility


Debt
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-31
Value2350265026500.00.00.00.00.0
Percentage of DebtInstrumentCarryingAmount0.00.00.00.00.00.00.00.0

dal:SeniorSecuredNotes2020, us-gaap:SecuredDebt


Debt
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302019-12-31
Value350035003500350035000.0
Percentage of DebtInstrumentCarryingAmount12.712.612.40.00.00.0

dal:TermLoan2020, us-gaap:SecuredDebt


Debt
Period End2020-12-312020-09-302020-06-302019-12-31
Value1493149615000.0
Percentage of DebtInstrumentCarryingAmount5.30.00.00.0

dal:UnsecuredNotes, us-gaap:UnsecuredDebt


Debt
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302017-12-31
Value47505350535058005800455055504050405040502450245024502450
Percentage of DebtInstrumentCarryingAmount17.319.319.00.00.00.055.545.644.239.326.327.625.828.7

us-gaap:DebtInstrumentUnamortizedDiscountPremiumAndDebtIssuanceCostsNet

us-gaap:DebtInstrumentUnamortizedDiscountPremiumAndDebtIssuanceCostsNet


Debt
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302017-12-31
Value25722624025289-155.0-115.0-151.0-125.0-82.0-60.0-17.0-23.099
Percentage of DebtInstrumentUnamortizedDiscountPremiumAndDebtIssuanceCostsNet100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DebtLongtermAndShorttermCombinedAmount

us-gaap:DebtLongtermAndShorttermCombinedAmount


Debt
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302011-12-31
Value2726527473279743364823493158401010682348440837685708770700872927492811079468417888791839379970398561056310845113911168811777121061198013060
Percentage of DebtLongtermAndShorttermCombinedAmount100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DeferredCreditsAndOtherLiabilities

us-gaap:DeferredCreditsAndOtherLiabilities


Deferred
Period End2021-03-31
Value847
Percentage of DeferredCreditsAndOtherLiabilities100.0

us-gaap:DeferredCreditsAndOtherLiabilities dal:PayrollSupportProgram

dal:PayrollSupportProgram3


Deferred
Period End2021-06-30
Value1800
Percentage of DeferredCreditsAndOtherLiabilities0.0

us-gaap:DeferredIncomeTaxAssetsNet

us-gaap:DeferredIncomeTaxAssetsNet


Deferred
Period End2021-06-302021-03-312020-12-312020-09-302019-12-312018-12-312018-09-302018-06-302018-03-312017-12-312016-12-31
Value215823061988130512024243280411759353064
Percentage of DeferredIncomeTaxAssetsNet100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DeferredIncomeTaxLiabilities

us-gaap:DeferredIncomeTaxLiabilities


Deferred
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-31
Value707976366762518076387500679171426866
Percentage of DeferredIncomeTaxLiabilities100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DeferredTaxAssetsCapitalLossCarryforwards

us-gaap:DeferredTaxAssetsCapitalLossCarryforwards


Deferred
Period End2020-12-31
Value483
Percentage of DeferredTaxAssetsCapitalLossCarryforwards100.0

us-gaap:DeferredTaxAssetsDeferredIncome

us-gaap:DeferredTaxAssetsDeferredIncome


Deferred
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-312010-12-312009-12-31
Value179716671620102415441522182419652133229722022282
Percentage of DeferredTaxAssetsDeferredIncome100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DeferredTaxAssetsOperatingLossCarryforwards

us-gaap:DeferredTaxAssetsOperatingLossCarryforwards


Deferred
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-312010-12-312009-12-31
Value1495560674144024853838478260246414664764726419
Percentage of DeferredTaxAssetsOperatingLossCarryforwards100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DeferredTaxAssetsOther

us-gaap:DeferredTaxAssetsOther


Deferred
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-312010-12-312009-12-31
Value6113503577469631047659698439564495413
Percentage of DeferredTaxAssetsOther100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefits

us-gaap:DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefits


Deferred
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-312010-12-31
Value29562241243525455259544460334982641557034527
Percentage of DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefits100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DeferredTaxLiabilitiesGoodwillAndIntangibleAssetsIntangibleAssets

us-gaap:DeferredTaxLiabilitiesGoodwillAndIntangibleAssetsIntangibleAssets


Deferred
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-312010-12-312009-12-31
Value107610491052107016911681168417041730175517311757
Percentage of DeferredTaxLiabilitiesGoodwillAndIntangibleAssetsIntangibleAssets100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DeferredTaxLiabilitiesOther

us-gaap:DeferredTaxLiabilitiesOther


Deferred
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-312010-12-312009-12-31
Value17299137174246329444639926840112
Percentage of DeferredTaxLiabilitiesOther100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DeferredTaxLiabilitiesPropertyPlantAndEquipment

us-gaap:DeferredTaxLiabilitiesPropertyPlantAndEquipment


Deferred
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-312010-12-312009-12-31
Value450751904185393657015490466347994851509348374925
Percentage of DeferredTaxLiabilitiesPropertyPlantAndEquipment100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DefinedBenefitPlanAccumulatedOtherComprehensiveIncomeBeforeTax us-gaap:RetirementPlanType

us-gaap:DefinedBenefitPlanAccumulatedOtherComprehensiveIncomeBeforeTax

us-gaap:OtherPostretirementBenefitPlansDefinedBenefit


Defined
Period End2020-12-312019-12-312018-12-312017-12-312016-12-31
Value857677566595488
Percentage of DefinedBenefitPlanAccumulatedOtherComprehensiveIncomeBeforeTax100.0100.0100.0100.0100.0

us-gaap:PensionPlansDefinedBenefit


Defined
Period End2020-12-312019-12-312018-12-312017-12-312016-12-31
Value98788765868284958515
Percentage of DefinedBenefitPlanAccumulatedOtherComprehensiveIncomeBeforeTax1152.61294.71533.91427.71744.9

us-gaap:DefinedBenefitPlanAccumulatedOtherComprehensiveIncomeNetGainsLossesBeforeTax us-gaap:RetirementPlanType

us-gaap:DefinedBenefitPlanAccumulatedOtherComprehensiveIncomeNetGainsLossesBeforeTax

us-gaap:OtherPostretirementBenefitPlansDefinedBenefit


Defined
Period End2020-12-312019-12-312018-12-312017-12-312016-12-31
Value-886.0-715.0-613.0-651.0-570.0
Percentage of DefinedBenefitPlanAccumulatedOtherComprehensiveIncomeNetGainsLossesBeforeTax100.0100.0100.0100.0100.0

us-gaap:PensionPlansDefinedBenefit


Defined
Period End2020-12-312019-12-312018-12-312017-12-312016-12-31
Value-9878.0-8765.0-8682.0-8495.0-8515.0
Percentage of DefinedBenefitPlanAccumulatedOtherComprehensiveIncomeNetGainsLossesBeforeTax1114.91225.91416.31304.91493.9

us-gaap:DefinedBenefitPlanAccumulatedOtherComprehensiveIncomeNetPriorServiceCostCreditBeforeTax us-gaap:RetirementPlanType

us-gaap:DefinedBenefitPlanAccumulatedOtherComprehensiveIncomeNetPriorServiceCostCreditBeforeTax

us-gaap:OtherPostretirementBenefitPlansDefinedBenefit


Defined
Period End2020-12-312019-12-312018-12-312017-12-312016-12-31
Value-29.0-38.0-47.0-56.0-82.0
Percentage of DefinedBenefitPlanAccumulatedOtherComprehensiveIncomeNetPriorServiceCostCreditBeforeTax100.0100.0100.0100.0100.0

us-gaap:DefinedBenefitPlanAssumptionsUsedCalculatingBenefitObligationDiscountRate

us-gaap:DefinedBenefitPlanAssumptionsUsedCalculatingBenefitObligationDiscountRate


Defined
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-312010-12-312009-12-31
Value2.620.0340.04330.03690.0420.04570.04140.05010.04110.04940.05690.0593
Percentage of DefinedBenefitPlanAssumptionsUsedCalculatingBenefitObligationDiscountRate100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DefinedBenefitPlanBenefitObligation us-gaap:RetirementPlanType

us-gaap:DefinedBenefitPlanBenefitObligation

us-gaap:OtherPostretirementBenefitPlansDefinedBenefit


Defined
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-31
Value476633793225350433793336
Percentage of DefinedBenefitPlanBenefitObligation100.0100.0100.0100.0100.0100.0

us-gaap:PensionPlansDefinedBenefit


Defined
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-31
Value226262119919809216962085920611
Percentage of DefinedBenefitPlanBenefitObligation474.7627.4614.2619.2617.3617.8

us-gaap:DefinedBenefitPlanExpectedFutureBenefitPaymentsFiveFiscalYearsThereafter us-gaap:RetirementPlanType

us-gaap:DefinedBenefitPlanExpectedFutureBenefitPaymentsFiveFiscalYearsThereafter

us-gaap:OtherPostretirementBenefitPlansDefinedBenefit


Defined
Period End2020-12-312019-12-312018-12-312017-12-31
Value2110152014181417
Percentage of DefinedBenefitPlanExpectedFutureBenefitPaymentsFiveFiscalYearsThereafter100.0100.0100.0100.0

us-gaap:PensionPlansDefinedBenefit


Defined
Period End2020-12-312019-12-312018-12-312017-12-31
Value6210624863806351
Percentage of DefinedBenefitPlanExpectedFutureBenefitPaymentsFiveFiscalYearsThereafter294.3411.1449.9448.2

us-gaap:DefinedBenefitPlanExpectedFutureBenefitPaymentsNextTwelveMonths us-gaap:RetirementPlanType

us-gaap:DefinedBenefitPlanExpectedFutureBenefitPaymentsNextTwelveMonths

us-gaap:OtherPostretirementBenefitPlansDefinedBenefit


Defined
Period End2020-12-312019-12-312018-12-312017-12-31
Value340324295284
Percentage of DefinedBenefitPlanExpectedFutureBenefitPaymentsNextTwelveMonths100.0100.0100.0100.0

us-gaap:PensionPlansDefinedBenefit


Defined
Period End2020-12-312019-12-312018-12-312017-12-31
Value1280117011871170
Percentage of DefinedBenefitPlanExpectedFutureBenefitPaymentsNextTwelveMonths376.5361.1402.4412.0

us-gaap:DefinedBenefitPlanExpectedFutureBenefitPaymentsYearFive us-gaap:RetirementPlanType

us-gaap:DefinedBenefitPlanExpectedFutureBenefitPaymentsYearFive

us-gaap:OtherPostretirementBenefitPlansDefinedBenefit


Defined
Period End2020-12-312019-12-312018-12-312017-12-31
Value430317298296
Percentage of DefinedBenefitPlanExpectedFutureBenefitPaymentsYearFive100.0100.0100.0100.0

us-gaap:PensionPlansDefinedBenefit


Defined
Period End2020-12-312019-12-312018-12-312017-12-31
Value1270123912521238
Percentage of DefinedBenefitPlanExpectedFutureBenefitPaymentsYearFive295.3390.9420.1418.2

us-gaap:DefinedBenefitPlanExpectedFutureBenefitPaymentsYearFour us-gaap:RetirementPlanType

us-gaap:DefinedBenefitPlanExpectedFutureBenefitPaymentsYearFour

us-gaap:OtherPostretirementBenefitPlansDefinedBenefit


Defined
Period End2020-12-312019-12-312018-12-312017-12-31
Value430321301297
Percentage of DefinedBenefitPlanExpectedFutureBenefitPaymentsYearFour100.0100.0100.0100.0

us-gaap:PensionPlansDefinedBenefit


Defined
Period End2020-12-312019-12-312018-12-312017-12-31
Value1270122612381220
Percentage of DefinedBenefitPlanExpectedFutureBenefitPaymentsYearFour295.3381.9411.3410.8

us-gaap:DefinedBenefitPlanExpectedFutureBenefitPaymentsYearThree us-gaap:RetirementPlanType

us-gaap:DefinedBenefitPlanExpectedFutureBenefitPaymentsYearThree

us-gaap:OtherPostretirementBenefitPlansDefinedBenefit


Defined
Period End2020-12-312019-12-312018-12-312017-12-31
Value410324303296
Percentage of DefinedBenefitPlanExpectedFutureBenefitPaymentsYearThree100.0100.0100.0100.0

us-gaap:PensionPlansDefinedBenefit


Defined
Period End2020-12-312019-12-312018-12-312017-12-31
Value1270121112181201
Percentage of DefinedBenefitPlanExpectedFutureBenefitPaymentsYearThree309.8373.8402.0405.7

us-gaap:DefinedBenefitPlanExpectedFutureBenefitPaymentsYearTwo us-gaap:RetirementPlanType

us-gaap:DefinedBenefitPlanExpectedFutureBenefitPaymentsYearTwo

us-gaap:OtherPostretirementBenefitPlansDefinedBenefit


Defined
Period End2020-12-312019-12-312018-12-312017-12-31
Value370327302291
Percentage of DefinedBenefitPlanExpectedFutureBenefitPaymentsYearTwo100.0100.0100.0100.0

us-gaap:PensionPlansDefinedBenefit


Defined
Period End2020-12-312019-12-312018-12-312017-12-31
Value1270118811971177
Percentage of DefinedBenefitPlanExpectedFutureBenefitPaymentsYearTwo343.2363.3396.4404.5

us-gaap:DefinedBenefitPlanExpectedFutureEmployerContributionsNextFiscalYear

us-gaap:DefinedBenefitPlanExpectedFutureEmployerContributionsNextFiscalYear


Defined
Period End2020-12-31
Value500
Percentage of DefinedBenefitPlanExpectedFutureEmployerContributionsNextFiscalYear100.0

us-gaap:DefinedBenefitPlanFundedStatusOfPlan us-gaap:RetirementPlanType

us-gaap:DefinedBenefitPlanFundedStatusOfPlan

us-gaap:OtherPostretirementBenefitPlansDefinedBenefit


Defined
Period End2020-12-312019-12-312018-12-312017-12-312016-12-31
Value-4270000000.0-2772000000.0-2588000000.0-2638000000.0-2595000000.0
Percentage of DefinedBenefitPlanFundedStatusOfPlan100.0100.0100.0100.0100.0

us-gaap:PensionPlansDefinedBenefit


Defined
Period End2020-12-312019-12-312018-12-312017-12-312016-12-31
Value-6085000000.0-5354000000.0-6350000000.0-6952000000.0-10558000000.0
Percentage of DefinedBenefitPlanFundedStatusOfPlan142.5193.1245.4263.5406.9

us-gaap:DefinedBenefitPlanHealthCareCostTrendRateAssumedNextFiscalYear

us-gaap:DefinedBenefitPlanHealthCareCostTrendRateAssumedNextFiscalYear


Defined
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-31
Value6.250.0650.06750.070.0650.07
Percentage of DefinedBenefitPlanHealthCareCostTrendRateAssumedNextFiscalYear100.0100.0100.0100.0100.0100.0

us-gaap:DefinedBenefitPlanPlanAssetsTargetAllocationPercentage us-gaap:Range, us-gaap:EquitySecuritiesByInvestmentObjective

us-gaap:DefinedBenefitPlanPlanAssetsTargetAllocationPercentage

srt:Maximum, dal:GrowthSeekingAssets


Defined
Period End2020-12-312019-12-312018-12-31
Value50.00.50.5
Percentage of DefinedBenefitPlanPlanAssetsTargetAllocationPercentage100.0100.0100.0

srt:Maximum, dal:IncomeGeneratingAssets


Defined
Period End2020-12-312019-12-312018-12-31
Value35.00.350.35
Percentage of DefinedBenefitPlanPlanAssetsTargetAllocationPercentage70.070.070.0

srt:Maximum, dal:RiskDiversifyingAssets


Defined
Period End2020-12-312019-12-312018-12-31
Value40.00.40.4
Percentage of DefinedBenefitPlanPlanAssetsTargetAllocationPercentage80.080.080.0

srt:Minimum, dal:GrowthSeekingAssets


Defined
Period End2020-12-312019-12-312018-12-31
Value30.00.30.3
Percentage of DefinedBenefitPlanPlanAssetsTargetAllocationPercentage60.060.060.0

srt:Minimum, dal:IncomeGeneratingAssets


Defined
Period End2020-12-312019-12-312018-12-31
Value25.00.250.25
Percentage of DefinedBenefitPlanPlanAssetsTargetAllocationPercentage50.050.050.0

srt:Minimum, dal:RiskDiversifyingAssets


Defined
Period End2020-12-312019-12-312018-12-31
Value30.00.30.3
Percentage of DefinedBenefitPlanPlanAssetsTargetAllocationPercentage60.060.060.0

us-gaap:DefinedBenefitPlanUltimateHealthCareCostTrendRate1

us-gaap:DefinedBenefitPlanUltimateHealthCareCostTrendRate1


Defined
Period End2020-12-31
Value5.0
Percentage of DefinedBenefitPlanUltimateHealthCareCostTrendRate1100.0

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

us-gaap:DerivativeAssetsLiabilitiesAtFairValueNet

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


Derivative
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302017-12-31
Value-9.0-3.0-6.0132.07.0146.0-5.0-10.0-40.0-23.0
Percentage of DerivativeAssetsLiabilitiesAtFairValueNet100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

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


Derivative
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302017-12-31
Value-13.0-2.06.0146.0213.08.0-3.0-9.05.0-17.0
Percentage of DerivativeAssetsLiabilitiesAtFairValueNet144.466.7-100.0107.7300.0300.021.4133.360.090.0-12.573.9

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


Derivative
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-30
Value23252625618262241.0-38.0-24.0
Percentage of DerivativeAssetsLiabilitiesAtFairValueNet-255.6-833.3-433.3192.33050.01171.4442.9400.0-20.0380.060.0

us-gaap:DerivativeAssetsLiabilitiesAtFairValueNet us-gaap:FairValueByMeasurementFrequency, us-gaap:FinancialInstrument

us-gaap:FairValueMeasurementsRecurring, us-gaap:EnergyRelatedDerivative


Derivative
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302017-12-31
Value-9.0-3.0-6.08.01.022-4.07.015-29.0-32.0-66.0
Percentage of DerivativeAssetsLiabilitiesAtFairValueNet100.0100.0100.061.550.0314.3-28.6116.7-300.0290.080.0287.0

us-gaap:FairValueMeasurementsRecurring, us-gaap:ForeignExchangeContract


Derivative
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302017-12-31
Value-13.0-2.06.0146.0213.08.0-3.0-9.05.0-17.0
Percentage of DerivativeAssetsLiabilitiesAtFairValueNet144.466.7-100.0107.7300.0300.021.4133.360.090.0-12.573.9

us-gaap:FairValueMeasurementsRecurring, us-gaap:InterestRateSwap


Derivative
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-30
Value23252625618262241.0-38.0-24.0
Percentage of DerivativeAssetsLiabilitiesAtFairValueNet-255.6-833.3-433.3192.33050.01171.4442.9400.0-20.0380.060.0

us-gaap:DerivativeFairValueOfDerivativeAsset us-gaap:BalanceSheetLocation

us-gaap:DerivativeFairValueOfDerivativeAsset

us-gaap:OtherAssets


Derivative
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302011-12-31
Value232425538759288.01512549.04.01.01.07.04640282438414983525158751298612810269881375.0
Percentage of DerivativeFairValueOfDerivativeAsset100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OtherCurrentAssets


Derivative
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302011-12-31
Value3.05.01511238636763445984100963921316322939349677321791987158696615751078524520437585610404496573556577
Percentage of DerivativeFairValueOfDerivativeAsset0.021.762.5448.071.772.4113.6225.0550.0393.3700.01868.57100.05325.016300.022900.05614.31078.31932.57782.18279.2413.0648.31897.62073.11027.5896.6582.7453.5709.3315.6486.3830.4631.811540.0

us-gaap:OtherNoncurrentAssets


Derivative
Period End2020-12-312019-12-312018-12-31
Value20538.0
Percentage of DerivativeFairValueOfDerivativeAsset0.0100.0100.0

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

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


Derivative
Period End2020-09-302020-06-302019-12-31
Value232353
Percentage of DerivativeFairValueOfDerivativeAsset100.095.8100.0

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


Derivative
Period End2020-12-312020-09-302020-06-302019-12-31
Value3.02.03.012
Percentage of DerivativeFairValueOfDerivativeAsset0.08.712.522.6

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


Derivative
Period End2020-12-312019-12-31
Value2053
Percentage of DerivativeFairValueOfDerivativeAsset0.0100.0

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

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


Derivative
Period End2020-09-302020-06-302019-12-31
Value3.07.016
Percentage of DerivativeFairValueOfDerivativeAsset13.029.230.2

us-gaap:DerivativeFairValueOfDerivativeAssetAmountNotOffsetAgainstCollateral us-gaap:BalanceSheetLocation

us-gaap:DerivativeFairValueOfDerivativeAssetAmountNotOffsetAgainstCollateral

us-gaap:OtherAssets


Derivative
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302012-12-31
Value232425538759280.00.09.01.01.00.01.01.06.07.08.06.021296448494652741168412169
Percentage of DerivativeFairValueOfDerivativeAssetAmountNotOffsetAgainstCollateral100.0100.0100.0100.0100.0100.0100.00.00.0100.0100.0100.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OtherCurrentAssets


Derivative
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302012-12-31
Value3.02.08.02224383421351422210.01.07.0153110.0426.014319112914829215355401456457240320
Percentage of DerivativeFairValueOfDerivativeAssetAmountNotOffsetAgainstCollateral0.08.733.388.045.343.757.675.00.00.0244.42100.00.00.0700.01500.0516.7142.9525.0100.0681.0658.6201.6308.359.2467.4682.7541.9393.1544.0198.3463.8

us-gaap:OtherNoncurrentAssets


Derivative
Period End2020-12-312019-12-312018-12-31
Value20530.0
Percentage of DerivativeFairValueOfDerivativeAssetAmountNotOffsetAgainstCollateral0.0100.00.0

us-gaap:DerivativeFairValueOfDerivativeLiability us-gaap:BalanceSheetLocation

us-gaap:DerivativeFairValueOfDerivativeLiability

us-gaap:OtherCurrentLiabilities


Derivative
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302012-12-31
Value9.06.01390192555462276106102070735237246068872489526302581219414402512277242617753146178192287
Percentage of DerivativeFairValueOfDerivativeLiability100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OtherLiabilities


Derivative
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302011-12-31
Value2.00.00.04.00.010.06.01774417824306.0123.0145225267115183524791404233526458575249336884585
Percentage of DerivativeFairValueOfDerivativeLiability33.30.00.021.10.018.213.077.397.438.77.63.48.51.62.60.420.025.110.20.423.624.419.15.19.918.698.143.832.629.70.017.10.00.00.0

us-gaap:OtherNoncurrentLiabilities


Derivative
Period End2020-12-312019-12-312018-12-31
Value134.017
Percentage of DerivativeFairValueOfDerivativeLiability144.421.177.3

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

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


Derivative
Period End2020-12-312020-09-302020-06-302019-12-31
Value9.06.01315
Percentage of DerivativeFairValueOfDerivativeLiability100.0100.0100.078.9

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


Derivative
Period End2020-09-302020-06-302019-12-31
Value2.00.04.0
Percentage of DerivativeFairValueOfDerivativeLiability33.30.021.1

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


Derivative
Period End2020-12-312019-12-31
Value134.0
Percentage of DerivativeFairValueOfDerivativeLiability144.421.1

us-gaap:DerivativeFairValueOfDerivativeLiabilityAmountNotOffsetAgainstCollateral us-gaap:BalanceSheetLocation

us-gaap:DerivativeFairValueOfDerivativeLiabilityAmountNotOffsetAgainstCollateral

us-gaap:OtherCurrentLiabilities


Derivative
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302012-12-31
Value9.03.06.00.05.00.0225.0133154316814021624632623816445773779960310741723117111719282834
Percentage of DerivativeFairValueOfDerivativeLiabilityAmountNotOffsetAgainstCollateral100.0100.0100.00.0100.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OtherLiabilities


Derivative
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302012-12-31
Value2.00.00.04.00.010.05.09.059282616266.0122.01061932458.016326745513737285149535049
Percentage of DerivativeFairValueOfDerivativeLiabilityAmountNotOffsetAgainstCollateral66.70.00.080.00.045.5100.069.2190.351.983.923.518.62.84.90.644.5117.753.61.120.444.342.48.031.6254.5300.0257.9189.3178.6144.1

us-gaap:OtherNoncurrentLiabilities


Derivative
Period End2020-12-312019-12-312018-12-31
Value134.09.0
Percentage of DerivativeFairValueOfDerivativeLiabilityAmountNotOffsetAgainstCollateral144.480.069.2

us-gaap:DerivativeFairValueOfDerivativeNet

us-gaap:DerivativeFairValueOfDerivativeNet


Derivative
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312010-12-31
Value1.020264768125613913-76.0-51.0-35.0-83.0-165.0-214.0-242.0-291.0-327.0-307.0-690.0-581.0-742.0-677.0-1333.0-1782.0107368407504460283401306149-337.0133-110.0196
Percentage of DerivativeFairValueOfDerivativeNet100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

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

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


Derivative
Period End2020-12-312020-09-302020-06-302019-12-31
Value23252661
Percentage of DerivativeFairValueOfDerivativeNet2300.0125.0100.089.7

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

dal:ForeignExchangeContractWonBased, us-gaap:Nondesignated


Derivative
Period End2020-12-312020-09-302020-06-302019-12-31
Value-13.0-2.01.0-3.0
Percentage of DerivativeFairValueOfDerivativeNet-1300.0-10.03.8-4.4

us-gaap:EnergyRelatedDerivative, us-gaap:Nondesignated


Derivative
Period End2020-12-312020-09-302020-06-302019-12-31
Value-9.0-3.0-6.01.0
Percentage of DerivativeFairValueOfDerivativeNet-900.0-15.0-23.11.5

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

us-gaap:DerivativeNotionalAmount

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


Derivative
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302018-12-31
Value1501501501501872187218831893
Percentage of DerivativeNotionalAmount100.0100.0100.0100.0100.0100.0100.0100.0

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

dal:ForeignExchangeContractWonBased, us-gaap:Nondesignated


Derivative
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-11-30
Value177045177045177045177045177045177000
Percentage of DerivativeNotionalAmount118030.0118030.0118030.0118030.09457.50.0

us-gaap:EmployeeRelatedLiabilitiesCurrent

us-gaap:EmployeeRelatedLiabilitiesCurrent


Employee
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312009-12-31
Value2215218220861904180918443701311926172037328728522436191530222683225918352924262822371903319527902112162222662299180214551926176914141223168014911229107113671203108699613701037
Percentage of EmployeeRelatedLiabilitiesCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized

us-gaap:EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized


Employee
Period End2020-12-312011-12-312010-12-31
Value806065
Percentage of EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized100.0100.0100.0

us-gaap:EquityMethodInvestmentOwnershipPercentage us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName

us-gaap:EquityMethodInvestmentOwnershipPercentage

dal:GrupoAeromexico


Equity
Period End2020-09-302020-06-302020-05-312020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-03-312016-12-312016-09-302016-06-302016-03-31
Value51.051.00.510.510.510.510.510.510.510.490.490.490.490.490.360.0420.0420.0410.041
Percentage of EquityMethodInvestmentOwnershipPercentage100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

dal:Unifi


Equity
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302019-12-31
Value49.049.049.049.00.490.49
Percentage of EquityMethodInvestmentOwnershipPercentage0.00.00.096.11.096.1

dal:VirginAtlantic


Equity
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-30
Value49.049.00.490.490.490.490.490.490.490.490.490.490.490.49
Percentage of EquityMethodInvestmentOwnershipPercentage0.096.11.096.196.196.196.196.196.1100.0100.0100.0100.0100.0

us-gaap:EquityMethodInvestments us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName

us-gaap:EquityMethodInvestments

dal:Unifi


Equity
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302019-12-31
Value162165154147143142
Percentage of EquityMethodInvestments100.0100.0100.0100.0100.0100.0

dal:UnifiAviation


Equity
Period End2020-12-312019-12-31
Value154142
Percentage of EquityMethodInvestments100.0100.0

us-gaap:FairValueInvestmentsEntitiesThatCalculateNetAssetValuePerShareUnfundedCommittments us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:InvestmentType

us-gaap:FairValueInvestmentsEntitiesThatCalculateNetAssetValuePerShareUnfundedCommittments

us-gaap:FairValueMeasuredAtNetAssetValuePerShare, dal:RealAssets


Fair
Period End2020-12-312019-12-31
Value181203
Percentage of FairValueInvestmentsEntitiesThatCalculateNetAssetValuePerShareUnfundedCommittments100.0100.0

us-gaap:FairValueMeasuredAtNetAssetValuePerShare, us-gaap:DebtSecurities


Fair
Period End2020-12-312019-12-31
Value264254
Percentage of FairValueInvestmentsEntitiesThatCalculateNetAssetValuePerShareUnfundedCommittments145.9125.1

us-gaap:FairValueMeasuredAtNetAssetValuePerShare, us-gaap:EquitySecurities


Fair
Period End2020-12-312019-12-31
Value916393
Percentage of FairValueInvestmentsEntitiesThatCalculateNetAssetValuePerShareUnfundedCommittments506.1193.6

us-gaap:FairValueLiabilitiesMeasuredOnRecurringBasisObligations

us-gaap:FairValueLiabilitiesMeasuredOnRecurringBasisObligations


Fair
Period End2021-03-312020-03-31
Value34633
Percentage of FairValueLiabilitiesMeasuredOnRecurringBasisObligations100.0100.0

us-gaap:FairValueLiabilitiesMeasuredOnRecurringBasisObligations us-gaap:ConsolidationItems, us-gaap:StatementBusinessSegments

us-gaap:OperatingSegments, dal:Refinery


Fair
Period End2021-03-312020-03-31
Value34633
Percentage of FairValueLiabilitiesMeasuredOnRecurringBasisObligations100.0100.0

us-gaap:FinanceLeaseLiability

us-gaap:FinanceLeaseLiability


Finance
Period End2020-12-31
Value1183
Percentage of FinanceLeaseLiability100.0

us-gaap:FinanceLeaseLiabilityCurrent

us-gaap:FinanceLeaseLiabilityCurrent


Finance
Period End2020-12-312019-12-312018-12-31
Value289233109
Percentage of FinanceLeaseLiabilityCurrent100.0100.0100.0

us-gaap:FinanceLeaseLiabilityNoncurrent

us-gaap:FinanceLeaseLiabilityNoncurrent


Finance
Period End2020-12-312019-12-312018-12-31
Value894821294
Percentage of FinanceLeaseLiabilityNoncurrent100.0100.0100.0

us-gaap:FinanceLeaseLiabilityPaymentsDue

us-gaap:FinanceLeaseLiabilityPaymentsDue


Finance
Period End2020-12-31
Value1300
Percentage of FinanceLeaseLiabilityPaymentsDue100.0

us-gaap:FinanceLeaseLiabilityPaymentsDueAfterYearFive

us-gaap:FinanceLeaseLiabilityPaymentsDueAfterYearFive


Finance
Period End2020-12-31
Value149
Percentage of FinanceLeaseLiabilityPaymentsDueAfterYearFive100.0

us-gaap:FinanceLeaseLiabilityPaymentsDueNextTwelveMonths

us-gaap:FinanceLeaseLiabilityPaymentsDueNextTwelveMonths


Finance
Period End2020-12-31
Value328
Percentage of FinanceLeaseLiabilityPaymentsDueNextTwelveMonths100.0

us-gaap:FinanceLeaseLiabilityPaymentsDueYearFive

us-gaap:FinanceLeaseLiabilityPaymentsDueYearFive


Finance
Period End2020-12-31
Value128
Percentage of FinanceLeaseLiabilityPaymentsDueYearFive100.0

us-gaap:FinanceLeaseLiabilityPaymentsDueYearFour

us-gaap:FinanceLeaseLiabilityPaymentsDueYearFour


Finance
Period End2020-12-31
Value266
Percentage of FinanceLeaseLiabilityPaymentsDueYearFour100.0

us-gaap:FinanceLeaseLiabilityPaymentsDueYearThree

us-gaap:FinanceLeaseLiabilityPaymentsDueYearThree


Finance
Period End2020-12-31
Value191
Percentage of FinanceLeaseLiabilityPaymentsDueYearThree100.0

us-gaap:FinanceLeaseLiabilityPaymentsDueYearTwo

us-gaap:FinanceLeaseLiabilityPaymentsDueYearTwo


Finance
Period End2020-12-31
Value238
Percentage of FinanceLeaseLiabilityPaymentsDueYearTwo100.0

us-gaap:FinanceLeaseLiabilityUndiscountedExcessAmount

us-gaap:FinanceLeaseLiabilityUndiscountedExcessAmount


Finance
Period End2020-12-31
Value117
Percentage of FinanceLeaseLiabilityUndiscountedExcessAmount100.0

us-gaap:FinanceLeaseRightOfUseAsset

us-gaap:FinanceLeaseRightOfUseAsset


Finance
Period End2020-12-312019-12-312018-12-31
Value10021062490
Percentage of FinanceLeaseRightOfUseAsset100.0100.0100.0

us-gaap:FinanceLeaseWeightedAverageDiscountRatePercent

us-gaap:FinanceLeaseWeightedAverageDiscountRatePercent


Finance
Period End2020-12-312019-12-312018-12-31
Value3.610.03460.0523
Percentage of FinanceLeaseWeightedAverageDiscountRatePercent100.0100.0100.0

us-gaap:FiniteLivedIntangibleAssetsAccumulatedAmortization

us-gaap:FiniteLivedIntangibleAssetsAccumulatedAmortization


Finite
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312009-12-31
Value888885883880878875873871868865862857853849845841837833828824820815811806802797793782771753-738.0719702685670651634617600582565547530451
Percentage of FiniteLivedIntangibleAssetsAccumulatedAmortization100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:FiniteLivedIntangibleAssetsAccumulatedAmortization us-gaap:FiniteLivedIntangibleAssetsByMajorClass

us-gaap:ContractBasedIntangibleAssets


Finite
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-31
Value13412812211510810092-83.0-72.0
Percentage of FiniteLivedIntangibleAssetsAccumulatedAmortization15.214.714.213.613.012.311.611.2-10.7

us-gaap:MarketingRelatedIntangibleAssets


Finite
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-31
Value696692687677667658648-602.0-545.0
Percentage of FiniteLivedIntangibleAssetsAccumulatedAmortization78.879.379.780.180.681.181.781.6-81.3

us-gaap:OtherIntangibleAssets


Finite
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-312010-12-31
Value53535353535353-53.0535353
Percentage of FiniteLivedIntangibleAssetsAccumulatedAmortization6.06.16.16.36.46.56.77.27.98.810.0

us-gaap:FiniteLivedIntangibleAssetsAmortizationExpenseNextTwelveMonths

us-gaap:FiniteLivedIntangibleAssetsAmortizationExpenseNextTwelveMonths


Finite
Period End2020-12-31
Value9000000.0
Percentage of FiniteLivedIntangibleAssetsAmortizationExpenseNextTwelveMonths100.0

us-gaap:FiniteLivedIntangibleAssetsAmortizationExpenseYearFive

us-gaap:FiniteLivedIntangibleAssetsAmortizationExpenseYearFive


Finite
Period End2020-12-31
Value9000000.0
Percentage of FiniteLivedIntangibleAssetsAmortizationExpenseYearFive100.0

us-gaap:FiniteLivedIntangibleAssetsAmortizationExpenseYearFour

us-gaap:FiniteLivedIntangibleAssetsAmortizationExpenseYearFour


Finite
Period End2020-12-31
Value9000000.0
Percentage of FiniteLivedIntangibleAssetsAmortizationExpenseYearFour100.0

us-gaap:FiniteLivedIntangibleAssetsAmortizationExpenseYearThree

us-gaap:FiniteLivedIntangibleAssetsAmortizationExpenseYearThree


Finite
Period End2020-12-31
Value9000000.0
Percentage of FiniteLivedIntangibleAssetsAmortizationExpenseYearThree100.0

us-gaap:FiniteLivedIntangibleAssetsAmortizationExpenseYearTwo

us-gaap:FiniteLivedIntangibleAssetsAmortizationExpenseYearTwo


Finite
Period End2020-12-31
Value9000000.0
Percentage of FiniteLivedIntangibleAssetsAmortizationExpenseYearTwo100.0

us-gaap:GuaranteeObligationsMaximumExposure us-gaap:GuaranteeObligationsByNature, us-gaap:UnderlyingAssetClass

us-gaap:GuaranteeObligationsMaximumExposure

us-gaap:FinancialGuarantee, us-gaap:DebtSecuritiesPayable


Guarantee
Period End2020-12-31
Value800
Percentage of GuaranteeObligationsMaximumExposure100.0

us-gaap:HedgedLiabilityDiscontinuedFairValueHedgeCumulativeIncreaseDecrease

us-gaap:HedgedLiabilityDiscontinuedFairValueHedgeCumulativeIncreaseDecrease


Hedged
Period End2020-12-312020-09-30
Value-76000000.0-84000000.0
Percentage of HedgedLiabilityDiscontinuedFairValueHedgeCumulativeIncreaseDecrease100.0100.0

us-gaap:HedgedLiabilityFairValueHedgeCumulativeIncreaseDecrease us-gaap:BalanceSheetLocation

us-gaap:HedgedLiabilityFairValueHedgeCumulativeIncreaseDecrease

dal:CurrentMaturitiesOfDebtAndFinanceLeases


Hedged
Period End2020-12-312020-09-302020-06-302020-03-312019-12-31
Value-21.0-21.0-21.0-22.0-8.0
Percentage of HedgedLiabilityFairValueHedgeCumulativeIncreaseDecrease100.0100.0100.0100.0100.0

dal:DebtAndFinanceLeases


Hedged
Period End2020-12-312020-09-302020-06-302020-03-312019-12-31
Value-77.0-88.0-96.0-102.0-53.0
Percentage of HedgedLiabilityFairValueHedgeCumulativeIncreaseDecrease366.7419.0457.1463.6662.5

us-gaap:ImpairedAssetsToBeDisposedOfByMethodOtherThanSaleCarryingValueOfAsset us-gaap:ImpairedAssetsToBeDisposedOfByMethodOtherThanSaleByType

us-gaap:ImpairedAssetsToBeDisposedOfByMethodOtherThanSaleCarryingValueOfAsset

dal:RetiredAircraft


Impaired
Period End2020-12-312020-09-30
Value500520
Percentage of ImpairedAssetsToBeDisposedOfByMethodOtherThanSaleCarryingValueOfAsset100.0100.0

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueNextTwelveMonths

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueNextTwelveMonths


Lessee
Period End2020-12-31
Value949
Percentage of LesseeOperatingLeaseLiabilityPaymentsDueNextTwelveMonths100.0

us-gaap:LineOfCreditFacilityRemainingBorrowingCapacity us-gaap:LongtermDebtType

us-gaap:LineOfCreditFacilityRemainingBorrowingCapacity

us-gaap:RevolvingCreditFacility


Line
Period End2021-06-302021-03-312020-12-312020-09-30
Value26002600260025
Percentage of LineOfCreditFacilityRemainingBorrowingCapacity100.0100.0100.0100.0

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

us-gaap:RevolvingCreditFacility, us-gaap:SubsequentEvent


Line
Period End2020-10-13
Value2600
Percentage of LineOfCreditFacilityRemainingBorrowingCapacity0.0

us-gaap:LongTermDebtAndCapitalLeaseObligationsCurrent

us-gaap:LongTermDebtAndCapitalLeaseObligationsCurrent


Long
Period End2020-12-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312009-12-31
Value173222872196228130551518117613422289224212241098104011311092111515311563170516591261121611691233157815471823169515931627154617791855194419371635172320731533
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

us-gaap:LongTermDebtFairValue


Long
Period End2020-12-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302017-12-31
Value298001040093009600106009400900097008700
Percentage of LongTermDebtFairValue100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:LongTermDebtFairValue dal:PayrollSupportProgram, us-gaap:DebtInstrument, us-gaap:LongtermDebtType

dal:PayrollSupportProgram2, dal:PayrollSupportProgramExtensionLoan, us-gaap:UnsecuredDebt


Long
Period End2021-06-30
Value905
Percentage of LongTermDebtFairValue0.0

dal:PayrollSupportProgram3, dal:PayrollSupportProgramLoan3, us-gaap:UnsecuredDebt


Long
Period End2021-06-30
Value857
Percentage of LongTermDebtFairValue0.0

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

dal:PayrollSupportProgramExtensionLoan, us-gaap:UnsecuredDebt


Long
Period End2021-03-31
Value784
Percentage of LongTermDebtFairValue0.0

us-gaap:LongTermDebtMaturitiesRepaymentsOfPrincipalAfterYearFive

us-gaap:LongTermDebtMaturitiesRepaymentsOfPrincipalAfterYearFive


Long
Period End2020-12-31
Value12553
Percentage of LongTermDebtMaturitiesRepaymentsOfPrincipalAfterYearFive100.0

us-gaap:LongTermDebtMaturitiesRepaymentsOfPrincipalInNextTwelveMonths

us-gaap:LongTermDebtMaturitiesRepaymentsOfPrincipalInNextTwelveMonths


Long
Period End2020-12-31
Value1480
Percentage of LongTermDebtMaturitiesRepaymentsOfPrincipalInNextTwelveMonths100.0

us-gaap:LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFive

us-gaap:LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFive


Long
Period End2020-12-31
Value5157
Percentage of LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFive100.0

us-gaap:LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFour

us-gaap:LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFour


Long
Period End2020-12-31
Value3126
Percentage of LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFour100.0

us-gaap:LongTermDebtMaturitiesRepaymentsOfPrincipalInYearThree

us-gaap:LongTermDebtMaturitiesRepaymentsOfPrincipalInYearThree


Long
Period End2020-12-31
Value4016
Percentage of LongTermDebtMaturitiesRepaymentsOfPrincipalInYearThree100.0

us-gaap:LongTermDebtMaturitiesRepaymentsOfPrincipalInYearTwo

us-gaap:LongTermDebtMaturitiesRepaymentsOfPrincipalInYearTwo


Long
Period End2020-12-31
Value1882
Percentage of LongTermDebtMaturitiesRepaymentsOfPrincipalInYearTwo100.0

us-gaap:NotesReceivableNet us-gaap:CounterpartyName, us-gaap:AccountsNotesLoansAndFinancingReceivableByReceivableType

us-gaap:NotesReceivableNet

dal:GOL, us-gaap:FinanceReceivables


Notes
Period End2020-12-312020-09-30
Value93235
Percentage of NotesReceivableNet100.0100.0

us-gaap:NotesReceivableRelatedParties us-gaap:CounterpartyName

us-gaap:NotesReceivableRelatedParties

dal:GrupoAeromexico


Notes
Period End2021-06-30
Value185
Percentage of NotesReceivableRelatedParties100.0

dal:GrupoAeromexicoLATAMAndVirginAtlantic


Notes
Period End2021-06-302021-03-31
Value530480
Percentage of NotesReceivableRelatedParties286.50.0

dal:LATAMAndGrupoAeromexico


Notes
Period End2020-12-31
Value165
Percentage of NotesReceivableRelatedParties0.0

us-gaap:OperatingLeaseWeightedAverageDiscountRatePercent

us-gaap:OperatingLeaseWeightedAverageDiscountRatePercent


Operating
Period End2020-12-312019-12-312018-12-31
Value4.880.03730.0369
Percentage of OperatingLeaseWeightedAverageDiscountRatePercent100.0100.0100.0

us-gaap:OperatingLossCarryforwards

us-gaap:OperatingLossCarryforwards


Operating
Period End2020-12-31
Value5700
Percentage of OperatingLossCarryforwards100.0

us-gaap:OtherNotesPayable us-gaap:CounterpartyName

us-gaap:OtherNotesPayable

dal:LATAMAndGrupoAeromexico


Other
Period End2020-12-31
Value165
Percentage of OtherNotesPayable100.0

us-gaap:OtherNotesPayable us-gaap:CounterpartyName, us-gaap:DebtInstrument

dal:GrupoAeromexico, us-gaap:NotesPayableOtherPayables


Other
Period End2021-06-30
Value185
Percentage of OtherNotesPayable0.0

dal:GrupoAeromexicoLATAMAndVirginAtlantic, us-gaap:NotesPayableOtherPayables


Other
Period End2021-06-30
Value530
Percentage of OtherNotesPayable0.0

us-gaap:OtherNotesPayable us-gaap:DebtInstrument

us-gaap:NotesPayableOtherPayables


Other
Period End2021-03-312020-12-312020-09-30
Value480115115
Percentage of OtherNotesPayable0.069.70.0

us-gaap:PensionAndOtherPostretirementDefinedBenefitPlansCurrentLiabilities us-gaap:RetirementPlanType

us-gaap:PensionAndOtherPostretirementDefinedBenefitPlansCurrentLiabilities

us-gaap:OtherPostretirementBenefitPlansDefinedBenefit


Pension
Period End2020-12-312019-12-312018-12-312017-12-312016-12-31
Value143125123121125
Percentage of PensionAndOtherPostretirementDefinedBenefitPlansCurrentLiabilities100.0100.0100.0100.0100.0

us-gaap:PensionPlansDefinedBenefit


Pension
Period End2020-12-312019-12-312018-12-312017-12-312016-12-31
Value10.019273230
Percentage of PensionAndOtherPostretirementDefinedBenefitPlansCurrentLiabilities7.015.222.026.424.0

us-gaap:PensionAndOtherPostretirementDefinedBenefitPlansLiabilitiesCurrentAndNoncurrent us-gaap:RetirementPlanType

us-gaap:PensionAndOtherPostretirementDefinedBenefitPlansLiabilitiesCurrentAndNoncurrent

us-gaap:OtherPostretirementBenefitPlansDefinedBenefit


Pension
Period End2020-12-312019-12-312018-12-312017-12-312016-12-31
Value42702772258826382595
Percentage of PensionAndOtherPostretirementDefinedBenefitPlansLiabilitiesCurrentAndNoncurrent100.0100.0100.0100.0100.0

us-gaap:PensionPlansDefinedBenefit


Pension
Period End2020-12-312019-12-312018-12-312017-12-312016-12-31
Value608553546350695210558
Percentage of PensionAndOtherPostretirementDefinedBenefitPlansLiabilitiesCurrentAndNoncurrent142.5193.1245.4263.5406.9

us-gaap:PropertyPlantAndEquipmentAndFinanceLeaseRightOfUseAssetAccumulatedDepreciationAndAmortization

us-gaap:PropertyPlantAndEquipmentAndFinanceLeaseRightOfUseAssetAccumulatedDepreciationAndAmortization


Property
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302019-12-31
Value184771792217511182801726717027
Percentage of PropertyPlantAndEquipmentAndFinanceLeaseRightOfUseAssetAccumulatedDepreciationAndAmortization100.0100.0100.0100.0100.0100.0

us-gaap:PropertyPlantAndEquipmentAndFinanceLeaseRightOfUseAssetAccumulatedDepreciationAndAmortization us-gaap:PropertyPlantAndEquipmentByType

dal:FlightAndGroundEquipmentUnderFinanceLease


Property
Period End2020-12-312019-12-31
Value793546
Percentage of PropertyPlantAndEquipmentAndFinanceLeaseRightOfUseAssetAccumulatedDepreciationAndAmortization4.53.2

us-gaap:PropertyPlantAndEquipmentAndFinanceLeaseRightOfUseAssetAfterAccumulatedDepreciationAndAmortization

us-gaap:PropertyPlantAndEquipmentAndFinanceLeaseRightOfUseAssetAfterAccumulatedDepreciationAndAmortization


Property
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302019-12-31
Value275082686226529266022847331310
Percentage of PropertyPlantAndEquipmentAndFinanceLeaseRightOfUseAssetAfterAccumulatedDepreciationAndAmortization100.0100.0100.0100.0100.0100.0

us-gaap:PropertyPlantAndEquipmentAndFinanceLeaseRightOfUseAssetBeforeAccumulatedDepreciationAndAmortization us-gaap:PropertyPlantAndEquipmentByType

us-gaap:PropertyPlantAndEquipmentAndFinanceLeaseRightOfUseAssetBeforeAccumulatedDepreciationAndAmortization

dal:AdvancePaymentsForEquipment


Property
Period End2020-12-312019-12-31
Value8831019
Percentage of PropertyPlantAndEquipmentAndFinanceLeaseRightOfUseAssetBeforeAccumulatedDepreciationAndAmortization100.0100.0

dal:FlightAndGroundEquipmentUnderFinanceLease


Property
Period End2020-12-312019-12-31
Value17951608
Percentage of PropertyPlantAndEquipmentAndFinanceLeaseRightOfUseAssetBeforeAccumulatedDepreciationAndAmortization203.3157.8

dal:GroundPropertyAndEquipment


Property
Period End2020-12-312019-12-31
Value63875721
Percentage of PropertyPlantAndEquipmentAndFinanceLeaseRightOfUseAssetBeforeAccumulatedDepreciationAndAmortization723.3561.4

dal:InformationTechnologyRelatedAssets


Property
Period End2020-12-312019-12-31
Value34033276
Percentage of PropertyPlantAndEquipmentAndFinanceLeaseRightOfUseAssetBeforeAccumulatedDepreciationAndAmortization385.4321.5

us-gaap:FlightEquipment


Property
Period End2020-12-312019-12-31
Value3157236713
Percentage of PropertyPlantAndEquipmentAndFinanceLeaseRightOfUseAssetBeforeAccumulatedDepreciationAndAmortization3575.53602.8

us-gaap:ReportingUnitPercentageOfFairValueInExcessOfCarryingAmount us-gaap:Range

us-gaap:ReportingUnitPercentageOfFairValueInExcessOfCarryingAmount

srt:Minimum


Reporting
Period End2020-12-31
Value100.0
Percentage of ReportingUnitPercentageOfFairValueInExcessOfCarryingAmount100.0

us-gaap:RestrictedCashAndCashEquivalentsAtCarryingValue

us-gaap:RestrictedCashAndCashEquivalentsAtCarryingValue


Restricted
Period End2020-12-312019-12-312018-12-312018-03-312017-12-312017-03-31
Value19221247353961
Percentage of RestrictedCashAndCashEquivalentsAtCarryingValue100.0100.0100.0100.0100.0100.0

us-gaap:RestrictedCashAndCashEquivalentsNoncurrent

us-gaap:RestrictedCashAndCashEquivalentsNoncurrent


Restricted
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-30
Value92912231556168033945563675389310181136121413260.00.00.00.0
Percentage of RestrictedCashAndCashEquivalentsNoncurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.00.00.00.0

us-gaap:RestrictedCashCurrent

us-gaap:RestrictedCashCurrent


Restricted
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-31
Value172213189113394612757
Percentage of RestrictedCashCurrent100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:RestrictedInvestmentsAtFairValue us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FairValueByMeasurementFrequency

us-gaap:RestrictedInvestmentsAtFairValue

us-gaap:FairValueInputsLevel1, us-gaap:FairValueMeasurementsRecurring


Restricted
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312017-12-31
Value110114361747186845249484779810201075118338
Percentage of RestrictedInvestmentsAtFairValue100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:RestrictedInvestmentsAtFairValue us-gaap:FairValueByMeasurementFrequency

us-gaap:FairValueMeasurementsRecurring


Restricted
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312017-12-31
Value110114361747186845249484779810201075118338
Percentage of RestrictedInvestmentsAtFairValue100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber us-gaap:AwardType

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber

us-gaap:RestrictedStock


Share
Period End2020-12-31
Value2.2
Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber100.0

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableNumber

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableNumber


Share
Period End2020-12-31
Value2400000.0
Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableNumber100.0

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableWeightedAverageExercisePrice

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableWeightedAverageExercisePrice


Share
Period End2020-12-31
Value52.37
Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableWeightedAverageExercisePrice100.0

us-gaap:ShortTermBorrowings us-gaap:DebtInstrument, us-gaap:ShortTermDebtType

us-gaap:ShortTermBorrowings

dal:SecuredTermLoanFacility2020, us-gaap:LoansPayable


Short
Period End2020-09-302020-06-302020-03-312019-12-31
Value2950295027000.0
Percentage of ShortTermBorrowings100.0100.0100.00.0

us-gaap:ShortTermNonBankLoansAndNotesPayable

us-gaap:ShortTermNonBankLoansAndNotesPayable


Short
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312016-12-31
Value110011001100110083911007364391067106610751066106210621067431
Percentage of ShortTermNonBankLoansAndNotesPayable100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:UnrecordedUnconditionalPurchaseObligationBalanceOnFifthAnniversary us-gaap:UnrecordedUnconditionalPurchaseObligationByCategoryOfItemPurchased

us-gaap:UnrecordedUnconditionalPurchaseObligationBalanceOnFifthAnniversary

us-gaap:AirlineCapacityPurchaseArrangements


Unrecorded
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-31
Value83710027697237371650143013201690
Percentage of UnrecordedUnconditionalPurchaseObligationBalanceOnFifthAnniversary100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:CapitalAdditions


Unrecorded
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-31
Value274050018502450113019001060450760760
Percentage of UnrecordedUnconditionalPurchaseObligationBalanceOnFifthAnniversary327.449.9240.6338.9153.3115.274.134.145.00.0

us-gaap:UnrecordedUnconditionalPurchaseObligationBalanceOnFirstAnniversary us-gaap:UnrecordedUnconditionalPurchaseObligationByCategoryOfItemPurchased

us-gaap:UnrecordedUnconditionalPurchaseObligationBalanceOnFirstAnniversary

us-gaap:AirlineCapacityPurchaseArrangements


Unrecorded
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-31
Value141317501505177220392160222021102210
Percentage of UnrecordedUnconditionalPurchaseObligationBalanceOnFirstAnniversary100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:CapitalAdditions


Unrecorded
Period End2021-06-302021-03-312020-12-312020-09-302019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-31
Value335024801330131029803290357025802140148015851000215
Percentage of UnrecordedUnconditionalPurchaseObligationBalanceOnFirstAnniversary0.00.094.10.0170.3218.6201.5126.599.166.775.145.20.0

us-gaap:UnrecordedUnconditionalPurchaseObligationBalanceOnFourthAnniversary us-gaap:UnrecordedUnconditionalPurchaseObligationByCategoryOfItemPurchased

us-gaap:UnrecordedUnconditionalPurchaseObligationBalanceOnFourthAnniversary

us-gaap:AirlineCapacityPurchaseArrangements


Unrecorded
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-31
Value1209113287279312201960155015601850
Percentage of UnrecordedUnconditionalPurchaseObligationBalanceOnFourthAnniversary100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:CapitalAdditions


Unrecorded
Period End2021-06-302021-03-312020-12-312020-09-302019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-31
Value26602750296029601640276038801730150022301495810760
Percentage of UnrecordedUnconditionalPurchaseObligationBalanceOnFourthAnniversary0.00.0244.80.0144.9316.5489.3141.876.5143.995.843.80.0

us-gaap:UnrecordedUnconditionalPurchaseObligationBalanceOnSecondAnniversary us-gaap:UnrecordedUnconditionalPurchaseObligationByCategoryOfItemPurchased

us-gaap:UnrecordedUnconditionalPurchaseObligationBalanceOnSecondAnniversary

us-gaap:AirlineCapacityPurchaseArrangements


Unrecorded
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-31
Value137214321344160318272270193020402200
Percentage of UnrecordedUnconditionalPurchaseObligationBalanceOnSecondAnniversary100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:CapitalAdditions


Unrecorded
Period End2021-06-302021-03-312020-12-312020-09-302019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-31
Value289023102470246037403130337029802500197012151525530
Percentage of UnrecordedUnconditionalPurchaseObligationBalanceOnSecondAnniversary0.00.0180.00.0261.2232.9210.2163.1110.1102.159.669.30.0

us-gaap:UnrecordedUnconditionalPurchaseObligationBalanceOnThirdAnniversary us-gaap:UnrecordedUnconditionalPurchaseObligationByCategoryOfItemPurchased

us-gaap:UnrecordedUnconditionalPurchaseObligationBalanceOnThirdAnniversary

us-gaap:AirlineCapacityPurchaseArrangements


Unrecorded
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-31
Value12401377951132015622110172017802130
Percentage of UnrecordedUnconditionalPurchaseObligationBalanceOnThirdAnniversary100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:CapitalAdditions


Unrecorded
Period End2021-06-302021-03-312020-12-312020-09-302019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-31
Value30602960231023103390319032703380251023901700815745
Percentage of UnrecordedUnconditionalPurchaseObligationBalanceOnThirdAnniversary0.00.0186.30.0246.2335.4247.7216.4119.0139.095.538.30.0

us-gaap:UnrecordedUnconditionalPurchaseObligationBalanceSheetAmount us-gaap:UnrecordedUnconditionalPurchaseObligationByCategoryOfItemPurchased

us-gaap:UnrecordedUnconditionalPurchaseObligationBalanceSheetAmount

us-gaap:AirlineCapacityPurchaseArrangements


Unrecorded
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-31
Value7725904283038186858112320112201074013960
Percentage of UnrecordedUnconditionalPurchaseObligationBalanceSheetAmount100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:CapitalAdditions


Unrecorded
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302015-12-312014-12-312013-12-312012-12-312011-12-31
Value15200134001390014200142001470013700139001410015100162001550016400172001830013100137001240012500154001356013950914581506820
Percentage of UnrecordedUnconditionalPurchaseObligationBalanceSheetAmount0.00.0179.90.00.00.0151.50.00.00.0195.10.00.00.0223.60.00.00.0145.70.0110.1124.385.158.40.0

us-gaap:UnrecordedUnconditionalPurchaseObligationDueAfterFiveYears us-gaap:UnrecordedUnconditionalPurchaseObligationByCategoryOfItemPurchased

us-gaap:UnrecordedUnconditionalPurchaseObligationDueAfterFiveYears

us-gaap:AirlineCapacityPurchaseArrangements


Unrecorded
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-31
Value165423492862197511962170237019303880
Percentage of UnrecordedUnconditionalPurchaseObligationDueAfterFiveYears100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:CapitalAdditions


Unrecorded
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-31
Value207014401940174066030104820270032403810
Percentage of UnrecordedUnconditionalPurchaseObligationDueAfterFiveYears125.261.367.888.155.2138.7203.4139.983.50.0

us-gaap:UnrecordedUnconditionalPurchaseObligationDueInRemainderOfFiscalYear us-gaap:UnrecordedUnconditionalPurchaseObligationByCategoryOfItemPurchased

us-gaap:UnrecordedUnconditionalPurchaseObligationDueInRemainderOfFiscalYear

us-gaap:CapitalAdditions


Unrecorded
Period End2021-06-302021-03-312020-09-30
Value980750380
Percentage of UnrecordedUnconditionalPurchaseObligationDueInRemainderOfFiscalYear100.0100.0100.0

Line plots across dimensions of each concept


us-gaap:SharesIssued
us-gaap:StatementEquityComponents
(None,)
Shares Issuedus-gaap: Statement Equity Components
Operating Margin
us-gaap:ConsolidationItems, us-gaap:StatementBusinessSegments
('us-gaap:OperatingSegments', None)
Operating  Marginus-gaap: Consolidation Items, us-gaap: Statement Business Segments
TTM Greenblatt ROC
_
(None,)
T T M  Greenblatt  R O C_
us-gaap:InterestIncomeExpenseNet
us-gaap:ConsolidationItems, us-gaap:StatementBusinessSegments
('us-gaap:OperatingSegments', None)
Interest Income Expense Netus-gaap: Consolidation Items, us-gaap: Statement Business Segments
us-gaap:OperatingIncomeLoss
us-gaap:ConsolidationItems, us-gaap:StatementBusinessSegments
('us-gaap:OperatingSegments', None)
Operating Income Lossus-gaap: Consolidation Items, us-gaap: Statement Business Segments
us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax
us-gaap:ProductOrService
(None,)
Revenue From Contract With Customer Excluding Assessed Taxus-gaap: Product Or Service
us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax
us-gaap:ProductOrService, us-gaap:AirlineDestinations
('us-gaap:Passenger', None)
Revenue From Contract With Customer Excluding Assessed Taxus-gaap: Product Or Service, us-gaap: Airline Destinations
us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax
us-gaap:ConsolidationItems, us-gaap:ProductOrService
('us-gaap:IntersegmentElimination', None)