$DAL
DELTA AIR LINES, INC. Stock $dal

$dal Overview Financials Valuation SEC Filings Company Website

2018 Q4 Form 10-K Financial Statement

#000002790419000003 Filed on February 15, 2019

Income Statement

Concept	2018 Q4	2018 Q3	2018 Q2
Revenue	$10.74B	$11.95B	$11.78B
YoY Change	5.02%	8.06%	9.57%
Cost Of Revenue	$5.284B	$5.600B	$5.581B
YoY Change	20.5%	14.8%	23.12%
Gross Profit	$5.458B	$6.353B	$6.194B
YoY Change	-6.59%	2.75%	-0.32%
Gross Profit Margin	50.81%	53.15%	52.6%
Selling, General & Admin	$3.517B	$3.687B	$3.583B
YoY Change	8.18%	7.43%	7.73%
% of Gross Profit	64.44%	58.04%	57.85%
Research & Development
YoY Change
% of Gross Profit
Depreciation & Amortization	$2.329B	$573.0M	$583.0M
YoY Change	4.82%	0.35%	9.79%
% of Gross Profit	42.67%	9.02%	9.41%
Operating Expenses	$4.505B	$10.31B	$10.09B
YoY Change	6.93%	11.58%	15.13%
Operating Profit	$1.090B	$1.645B	$1.684B
YoY Change	-6.2%	-9.76%	-15.04%
Interest Expense	$256.0M	-$16.00M	-$223.0M
YoY Change	-145.07%	-116.0%	-316.5%
% of Operating Profit	23.49%	-0.97%	-13.24%
Other Income/Expense, Net	$136.0M	$43.00M	-$298.0M
YoY Change	-815.79%	-191.49%	97.35%
Pretax Income	$1.345B	$1.688B	$1.386B
YoY Change	28.95%	-4.95%	-24.3%
Income Tax	$326.0M	$366.0M	$350.0M
% Of Pretax Income	24.24%	21.68%	25.25%
Net Earnings	$1.019B	$1.322B	$1.036B
YoY Change	240.8%	14.06%	-12.65%
Net Earnings / Revenue	9.49%	11.06%	8.8%
Basic Earnings Per Share	$1.50	$1.93	$1.49
Diluted Earnings Per Share	$1.49	$1.92	$1.49
COMMON SHARES
Basic Shares Outstanding		686.0M shares	695.0M shares
Diluted Shares Outstanding		688.0M shares	697.0M shares

Balance Sheet

Concept	2018 Q4	2018 Q3	2018 Q2
SHORT-TERM ASSETS
Cash & Short-Term Investments	$1.768B	$1.858B	$2.406B
YoY Change	-33.0%	-23.79%	-19.48%
Cash & Equivalents	$1.565B	$1.380B	$1.886B
Short-Term Investments	$203.0M	$478.0M	$520.0M
Other Short-Term Assets	$1.203B	$1.181B	$1.219B
YoY Change	-17.55%	6.4%	12.14%
Inventory	$1.055B	$1.170B	$1.589B
Prepaid Expenses
Receivables	$2.314B	$2.517B	$2.427B
Other Receivables	$0.00	$0.00	$0.00
Total Short-Term Assets	$6.340B	$6.726B	$7.641B
YoY Change	-18.76%	-5.04%	6.47%
LONG-TERM ASSETS
Property, Plant & Equipment	$28.34B	$28.57B	$28.12B
YoY Change	6.67%	10.29%	10.87%
Goodwill	$9.781B	$9.794B	$9.794B
YoY Change	-0.13%	0.0%	0.0%
Intangibles	$4.830B	$4.835B	$4.839B
YoY Change	-0.35%	-0.33%	-0.33%
Long-Term Investments
YoY Change
Other Assets	$3.850B	$3.437B	$3.268B
YoY Change	16.35%	19.42%	28.41%
Total Long-Term Assets	$53.93B	$53.20B	$53.02B
YoY Change	17.57%	16.94%	17.12%
TOTAL ASSETS
Total Short-Term Assets	$6.340B	$6.726B	$7.641B
Total Long-Term Assets	$53.93B	$53.20B	$53.02B
Total Assets	$60.27B	$59.92B	$60.67B
YoY Change	12.29%	13.98%	15.66%
SHORT-TERM LIABILITIES
YoY Change
Accounts Payable	$2.976B	$3.265B	$3.749B
YoY Change	-18.11%	6.73%	37.53%
Accrued Expenses	$5.337B	$4.105B	$3.851B
YoY Change	27.59%	-9.86%	-11.35%
Deferred Revenue
YoY Change
Short-Term Debt	$0.00	$0.00	$0.00
YoY Change
Long-Term Debt Due	$1.409B	$1.080B	$1.256B
YoY Change	-34.31%	-11.76%	14.39%
Total Short-Term Liabilities	$18.58B	$18.16B	$19.27B
YoY Change	-2.01%	10.08%	15.86%
LONG-TERM LIABILITIES
Long-Term Debt	$7.959B	$7.801B	$8.258B
YoY Change	26.43%	2.86%	4.32%
Other Long-Term Liabilities	$969.0M	$2.517B	$2.365B
YoY Change	-56.37%	25.79%	25.46%
Total Long-Term Liabilities	$28.00B	$23.14B	$23.67B
YoY Change	26.23%	7.98%	9.06%
TOTAL LIABILITIES
Total Short-Term Liabilities	$18.58B	$18.16B	$19.27B
Total Long-Term Liabilities	$28.00B	$23.14B	$23.67B
Total Liabilities	$46.58B	$41.30B	$42.94B
YoY Change	13.22%	8.89%	12.01%
SHAREHOLDERS EQUITY
Retained Earnings	$10.04B	$9.696B	$8.851B
YoY Change	21.6%	2.04%	-0.61%
Common Stock	$11.67B	$11.74B	$11.81B
YoY Change	-3.17%	-3.24%	-3.84%
Preferred Stock
YoY Change
Treasury Stock (at cost)	$198.0M	$197.0M	$196.0M
YoY Change	25.32%	24.68%	25.64%
Treasury Stock Shares	8.192M shares	8.181M shares	8.156M shares
Shareholders Equity	$13.69B	$13.49B	$12.63B
YoY Change
Total Liabilities & Shareholders Equity	$60.27B	$55.00B	$55.80B
YoY Change	12.29%	5.92%	7.68%

Cashflow Statement

Concept	2018 Q4	2018 Q3	2018 Q2
OPERATING ACTIVITIES
Net Income	$1.019B	$1.322B	$1.036B
YoY Change	240.8%	14.06%	-12.65%
Depreciation, Depletion And Amortization	$2.329B	$573.0M	$583.0M
YoY Change	4.82%	0.35%	9.79%
Cash From Operating Activities	$1.245B	$1.499B	$2.898B
YoY Change	-34.16%	-5.9%	22.33%
INVESTING ACTIVITIES
Capital Expenditures	-$1.363B	-$962.0M	-$1.578B
YoY Change	17.5%	2.23%	59.72%
Acquisitions
YoY Change
Other Investing Activities	$343.0M	$59.00M	$35.00M
YoY Change	-336.55%	-116.67%	16.67%
Cash From Investing Activities	-$1.020B	-$903.0M	-$1.543B
YoY Change	-21.84%	-30.27%	61.06%
FINANCING ACTIVITIES
Cash Dividend Paid
YoY Change
Common Stock Issuance & Retirement, Net
YoY Change
Debt Paid & Issued, Net
YoY Change
Cash From Financing Activities	-125.0M	-1.208B	423.0M
YoY Change	-50.0%	11.23%	-139.39%
NET CHANGE
Cash From Operating Activities	1.245B	1.499B	2.898B
Cash From Investing Activities	-1.020B	-903.0M	-1.543B
Cash From Financing Activities	-125.0M	-1.208B	423.0M
Net Change In Cash	100.0M	-612.0M	1.778B
YoY Change	-70.24%	-22.34%	427.6%
FREE CASH FLOW
Cash From Operating Activities	$1.245B	$1.499B	$2.898B
Capital Expenditures	-$1.363B	-$962.0M	-$1.578B
Free Cash Flow	$2.608B	$2.461B	$4.476B
YoY Change	-14.52%	-2.88%	33.33%

Facts In Submission

Frame	Concept Type	Concept / XBRL Key	Value	Unit
CY2018	dal	Mileage Credit Marketing Agreement Duration Maximum MileageCreditMarketingAgreementDurationMaximum	P8Y
CY2018	dal	Mileage Credit Marketing Agreement Duration Minimum MileageCreditMarketingAgreementDurationMinimum	P1Y
CY2018	dal	Mileage Credit Redemption Majority Of New Miles Redemption Period MileageCreditRedemptionMajorityOfNewMilesRedemptionPeriod	P2Y
	dal	Percent Of Amount Above Threshold For Profit Sharing Payout PercentOfAmountAboveThresholdForProfitSharingPayout	0.2
	dal	Percent Of Threshold Amount For Profit Sharing Payout PercentOfThresholdAmountForProfitSharingPayout	0.1
CY2017Q4	dal	Profit Sharing Threshold ProfitSharingThreshold	2500000000.0	USD
CY2018	dal	Reclassification From Accumulated Other Comprehensive Income To Retained Earnings Adoption Of Accounting Standard Tax ReclassificationFromAccumulatedOtherComprehensiveIncomeToRetainedEarningsAdoptionOfAccountingStandardTax	61000000	USD
CY2016	dal	Weighted Average Price Per Treasury Share Withheld For Taxes WeightedAveragePricePerTreasuryShareWithheldForTaxes	44.27
CY2017	dal	Weighted Average Price Per Treasury Share Withheld For Taxes WeightedAveragePricePerTreasuryShareWithheldForTaxes	48.31
CY2018	dal	Weighted Average Price Per Treasury Share Withheld For Taxes WeightedAveragePricePerTreasuryShareWithheldForTaxes	54.90
CY2018	dei	Amendment Flag AmendmentFlag	false
CY2018	dei	Current Fiscal Year End Date CurrentFiscalYearEndDate	--12-31
CY2018	dei	Document Fiscal Period Focus DocumentFiscalPeriodFocus	FY
CY2018	dei	Document Fiscal Year Focus DocumentFiscalYearFocus	2018
CY2018	dei	Entity Central Index Key EntityCentralIndexKey	0000027904
CY2018	dei	Entity Current Reporting Status EntityCurrentReportingStatus	Yes
CY2018	dei	Entity Emerging Growth Company EntityEmergingGrowthCompany	false
CY2018	dei	Entity Filer Category EntityFilerCategory	Large Accelerated Filer
CY2018	dei	Entity Registrant Name EntityRegistrantName	DELTA AIR LINES INC /DE/
CY2018	dei	Entity Shell Company EntityShellCompany	false
CY2018	dei	Entity Small Business EntitySmallBusiness	false
CY2018	dei	Entity Voluntary Filers EntityVoluntaryFilers	No
CY2018	dei	Entity Well Known Seasoned Issuer EntityWellKnownSeasonedIssuer	Yes
CY2017Q4	us-gaap	Airline Related Inventory Valuation Reserves AirlineRelatedInventoryValuationReserves	113000000	USD
CY2018Q4	us-gaap	Airline Related Inventory Valuation Reserves AirlineRelatedInventoryValuationReserves	102000000	USD
CY2017Q4	us-gaap	Allowance For Doubtful Accounts Receivable Current AllowanceForDoubtfulAccountsReceivableCurrent	12000000	USD
CY2018Q4	us-gaap	Allowance For Doubtful Accounts Receivable Current AllowanceForDoubtfulAccountsReceivableCurrent	12000000	USD
CY2016	us-gaap	Amortization Of Intangible Assets AmortizationOfIntangibleAssets	17000000	USD
CY2017	us-gaap	Amortization Of Intangible Assets AmortizationOfIntangibleAssets	17000000	USD
CY2015Q4	us-gaap	Aoci Tax Attributable To Parent AociTaxAttributableToParent	-1222000000	USD
CY2016Q4	us-gaap	Aoci Tax Attributable To Parent AociTaxAttributableToParent	-1458000000	USD
CY2017Q4	us-gaap	Aoci Tax Attributable To Parent AociTaxAttributableToParent	-1400000000	USD
CY2018Q4	us-gaap	Aoci Tax Attributable To Parent AociTaxAttributableToParent	-1492000000	USD
CY2017Q4	us-gaap	Common Stock Par Or Stated Value Per Share CommonStockParOrStatedValuePerShare	0.0001
CY2017Q4	us-gaap	Common Stock Shares Authorized CommonStockSharesAuthorized	1500000000	shares
CY2017Q4	us-gaap	Common Stock Shares Issued CommonStockSharesIssued	714674160	shares
CY2018Q4	us-gaap	Common Stock Shares Issued CommonStockSharesIssued	688136306	shares
CY2018Q4	us-gaap	Finite Lived Intangible Assets Amortization Expense Year Five FiniteLivedIntangibleAssetsAmortizationExpenseYearFive	15000000	USD
CY2018Q4	us-gaap	Finite Lived Intangible Assets Amortization Expense Year Four FiniteLivedIntangibleAssetsAmortizationExpenseYearFour	15000000	USD
CY2018Q4	us-gaap	Finite Lived Intangible Assets Amortization Expense Year Three FiniteLivedIntangibleAssetsAmortizationExpenseYearThree	15000000	USD
CY2018Q4	us-gaap	Finite Lived Intangible Assets Amortization Expense Year Two FiniteLivedIntangibleAssetsAmortizationExpenseYearTwo	15000000	USD
CY2018	us-gaap	Operating Loss Carryforwards Expiration Date OperatingLossCarryforwardsExpirationDate	2027-01-01
CY2016	us-gaap	Other Comprehensive Income Loss Tax OtherComprehensiveIncomeLossTax	-293000000	USD
CY2017	us-gaap	Other Comprehensive Income Loss Tax OtherComprehensiveIncomeLossTax	-32000000	USD
CY2018	us-gaap	Other Comprehensive Income Loss Tax OtherComprehensiveIncomeLossTax	-88000000	USD
CY2016	us-gaap	Reclassification From Aoci Current Period Tax ReclassificationFromAociCurrentPeriodTax	-57000000	USD
CY2017	us-gaap	Reclassification From Aoci Current Period Tax ReclassificationFromAociCurrentPeriodTax	-90000000	USD
CY2018	us-gaap	Reclassification From Aoci Current Period Tax ReclassificationFromAociCurrentPeriodTax	-57000000	USD
CY2017Q4	us-gaap	Short Term Non Bank Loans And Notes Payable ShortTermNonBankLoansAndNotesPayable	1100000000	USD
CY2017Q4	us-gaap	Treasury Stock Shares TreasuryStockShares	7476181	shares
CY2018Q4	us-gaap	Treasury Stock Shares TreasuryStockShares	8191831	shares
CY2018	dei	Document Type DocumentType	10-K
CY2018	dei	Document Period End Date DocumentPeriodEndDate	2018-12-31
CY2018Q2	dei	Entity Public Float EntityPublicFloat	34200000000	USD
CY2019Q1	dei	Entity Common Stock Shares Outstanding EntityCommonStockSharesOutstanding	678950098	shares
CY2018Q4	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	1565000000	USD
CY2017Q4	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	1814000000	USD
CY2018Q4	us-gaap	Short Term Investments ShortTermInvestments	203000000	USD
CY2017Q4	us-gaap	Short Term Investments ShortTermInvestments	825000000	USD
CY2018Q4	us-gaap	Receivables Net Current ReceivablesNetCurrent	2314000000	USD
CY2017Q4	us-gaap	Receivables Net Current ReceivablesNetCurrent	2377000000	USD
CY2018Q4	us-gaap	Inventory Finished Goods InventoryFinishedGoods	592000000	USD
CY2017Q4	us-gaap	Inventory Finished Goods InventoryFinishedGoods	916000000	USD
CY2018Q4	us-gaap	Airline Related Inventory Net AirlineRelatedInventoryNet	463000000	USD
CY2017Q4	us-gaap	Airline Related Inventory Net AirlineRelatedInventoryNet	413000000	USD
CY2018Q4	us-gaap	Prepaid Expense And Other Assets Current PrepaidExpenseAndOtherAssetsCurrent	1203000000	USD
CY2017Q4	us-gaap	Prepaid Expense And Other Assets Current PrepaidExpenseAndOtherAssetsCurrent	1459000000	USD
CY2018Q4	us-gaap	Assets Current AssetsCurrent	6340000000	USD
CY2017Q4	us-gaap	Assets Current AssetsCurrent	7804000000	USD
CY2018Q4	us-gaap	Property Plant And Equipment Net PropertyPlantAndEquipmentNet	28335000000	USD
CY2017Q4	us-gaap	Property Plant And Equipment Net PropertyPlantAndEquipmentNet	26563000000	USD
CY2018Q4	us-gaap	Operating Lease Right Of Use Asset OperatingLeaseRightOfUseAsset	5994000000	USD
CY2017Q4	us-gaap	Operating Lease Right Of Use Asset OperatingLeaseRightOfUseAsset	0	USD
CY2018Q4	us-gaap	Goodwill Goodwill	9781000000	USD
CY2017Q4	us-gaap	Goodwill Goodwill	9794000000	USD
CY2018Q4	us-gaap	Intangible Assets Net Excluding Goodwill IntangibleAssetsNetExcludingGoodwill	4830000000	USD
CY2017Q4	us-gaap	Intangible Assets Net Excluding Goodwill IntangibleAssetsNetExcludingGoodwill	4847000000	USD
CY2018Q4	us-gaap	Restricted Cash And Cash Equivalents Noncurrent RestrictedCashAndCashEquivalentsNoncurrent	1136000000	USD
CY2017Q4	us-gaap	Restricted Cash And Cash Equivalents Noncurrent RestrictedCashAndCashEquivalentsNoncurrent	0	USD
CY2018Q4	us-gaap	Deferred Income Tax Assets Net DeferredIncomeTaxAssetsNet	242000000	USD
CY2017Q4	us-gaap	Deferred Income Tax Assets Net DeferredIncomeTaxAssetsNet	1354000000	USD
CY2018Q4	us-gaap	Other Assets Noncurrent OtherAssetsNoncurrent	3608000000	USD
CY2017Q4	us-gaap	Other Assets Noncurrent OtherAssetsNoncurrent	3309000000	USD
CY2018Q4	us-gaap	Assets Noncurrent AssetsNoncurrent	53926000000	USD
CY2017Q4	us-gaap	Assets Noncurrent AssetsNoncurrent	45867000000	USD
CY2018Q4	us-gaap	Assets Assets	60266000000	USD
CY2017Q4	us-gaap	Assets Assets	53671000000	USD
CY2018Q4	us-gaap	Long Term Debt And Capital Lease Obligations Current LongTermDebtAndCapitalLeaseObligationsCurrent	1518000000	USD
CY2017Q4	us-gaap	Long Term Debt And Capital Lease Obligations Current LongTermDebtAndCapitalLeaseObligationsCurrent	2242000000	USD
CY2018Q4	us-gaap	Operating Lease Liability Current OperatingLeaseLiabilityCurrent	955000000	USD
CY2017Q4	us-gaap	Operating Lease Liability Current OperatingLeaseLiabilityCurrent	0	USD
CY2018Q4	us-gaap	Accounts Payable Current AccountsPayableCurrent	2976000000	USD
CY2017Q4	us-gaap	Accounts Payable Current AccountsPayableCurrent	3634000000	USD
CY2018Q4	us-gaap	Employee Related Liabilities Current EmployeeRelatedLiabilitiesCurrent	3287000000	USD
CY2017Q4	us-gaap	Employee Related Liabilities Current EmployeeRelatedLiabilitiesCurrent	3022000000	USD
CY2018Q4	us-gaap	Short Term Non Bank Loans And Notes Payable ShortTermNonBankLoansAndNotesPayable	1075000000	USD
CY2017Q4	us-gaap	Short Term Non Bank Loans And Notes Payable ShortTermNonBankLoansAndNotesPayable	1067000000	USD
CY2018Q4	us-gaap	Other Accrued Liabilities Current OtherAccruedLiabilitiesCurrent	1117000000	USD
CY2017Q4	us-gaap	Other Accrued Liabilities Current OtherAccruedLiabilitiesCurrent	1868000000	USD
CY2018Q4	us-gaap	Liabilities Current LiabilitiesCurrent	18578000000	USD
CY2017Q4	us-gaap	Liabilities Current LiabilitiesCurrent	18959000000	USD
CY2018Q4	us-gaap	Long Term Debt And Capital Lease Obligations LongTermDebtAndCapitalLeaseObligations	8253000000	USD
CY2017Q4	us-gaap	Long Term Debt And Capital Lease Obligations LongTermDebtAndCapitalLeaseObligations	6592000000	USD
CY2018Q4	us-gaap	Pension And Other Postretirement Defined Benefit Plans Liabilities Noncurrent PensionAndOtherPostretirementDefinedBenefitPlansLiabilitiesNoncurrent	9163000000	USD
CY2017Q4	us-gaap	Pension And Other Postretirement Defined Benefit Plans Liabilities Noncurrent PensionAndOtherPostretirementDefinedBenefitPlansLiabilitiesNoncurrent	9810000000	USD
CY2018Q4	us-gaap	Operating Lease Liability Noncurrent OperatingLeaseLiabilityNoncurrent	5801000000	USD
CY2017Q4	us-gaap	Operating Lease Liability Noncurrent OperatingLeaseLiabilityNoncurrent	0	USD
CY2018Q4	us-gaap	Other Liabilities Noncurrent OtherLiabilitiesNoncurrent	1132000000	USD
CY2017Q4	us-gaap	Other Liabilities Noncurrent OtherLiabilitiesNoncurrent	2221000000	USD
CY2018Q4	us-gaap	Liabilities Noncurrent LiabilitiesNoncurrent	28001000000	USD
CY2017Q4	us-gaap	Liabilities Noncurrent LiabilitiesNoncurrent	22182000000	USD
CY2018Q4	us-gaap	Commitments And Contingencies CommitmentsAndContingencies		USD
CY2017Q4	us-gaap	Commitments And Contingencies CommitmentsAndContingencies		USD
CY2018Q4	us-gaap	Common Stock Value CommonStockValue	0	USD
CY2017Q4	us-gaap	Common Stock Value CommonStockValue	0	USD
CY2018Q4	us-gaap	Additional Paid In Capital Common Stock AdditionalPaidInCapitalCommonStock	11671000000	USD
CY2017Q4	us-gaap	Additional Paid In Capital Common Stock AdditionalPaidInCapitalCommonStock	12053000000	USD
CY2018Q4	us-gaap	Retained Earnings Accumulated Deficit RetainedEarningsAccumulatedDeficit	10039000000	USD
CY2017Q4	us-gaap	Retained Earnings Accumulated Deficit RetainedEarningsAccumulatedDeficit	8256000000	USD
CY2018Q4	us-gaap	Accumulated Other Comprehensive Income Loss Net Of Tax AccumulatedOtherComprehensiveIncomeLossNetOfTax	-7825000000	USD
CY2017Q4	us-gaap	Accumulated Other Comprehensive Income Loss Net Of Tax AccumulatedOtherComprehensiveIncomeLossNetOfTax	-7621000000	USD
CY2018Q4	us-gaap	Treasury Stock Value TreasuryStockValue	198000000	USD
CY2017Q4	us-gaap	Treasury Stock Value TreasuryStockValue	158000000	USD
CY2018Q4	us-gaap	Stockholders Equity StockholdersEquity	13687000000	USD
CY2017Q4	us-gaap	Stockholders Equity StockholdersEquity	12530000000	USD
CY2018Q4	us-gaap	Liabilities And Stockholders Equity LiabilitiesAndStockholdersEquity	60266000000	USD
CY2017Q4	us-gaap	Liabilities And Stockholders Equity LiabilitiesAndStockholdersEquity	53671000000	USD
CY2018	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	44438000000	USD
CY2017	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	41138000000	USD
CY2016	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	39450000000	USD
CY2018	us-gaap	Labor And Related Expense LaborAndRelatedExpense	10743000000	USD
CY2017	us-gaap	Labor And Related Expense LaborAndRelatedExpense	10058000000	USD
CY2016	us-gaap	Labor And Related Expense LaborAndRelatedExpense	9394000000	USD
CY2018	us-gaap	Fuel Costs FuelCosts	9020000000	USD
CY2017	us-gaap	Fuel Costs FuelCosts	6756000000	USD
CY2016	us-gaap	Fuel Costs FuelCosts	5985000000	USD
CY2018	us-gaap	Airline Capacity Purchase Arrangements AirlineCapacityPurchaseArrangements	3438000000	USD
CY2017	us-gaap	Airline Capacity Purchase Arrangements AirlineCapacityPurchaseArrangements	3466000000	USD
CY2016	us-gaap	Airline Capacity Purchase Arrangements AirlineCapacityPurchaseArrangements	3447000000	USD
CY2018	us-gaap	Depreciation Depletion And Amortization DepreciationDepletionAndAmortization	2329000000	USD
CY2017	us-gaap	Depreciation Depletion And Amortization DepreciationDepletionAndAmortization	2222000000	USD
CY2016	us-gaap	Depreciation Depletion And Amortization DepreciationDepletionAndAmortization	1886000000	USD
CY2018	us-gaap	Professional And Contract Services Expense ProfessionalAndContractServicesExpense	2175000000	USD
CY2017	us-gaap	Professional And Contract Services Expense ProfessionalAndContractServicesExpense	2108000000	USD
CY2016	us-gaap	Professional And Contract Services Expense ProfessionalAndContractServicesExpense	1918000000	USD
CY2018	us-gaap	Selling And Marketing Expense SellingAndMarketingExpense	1941000000	USD
CY2017	us-gaap	Selling And Marketing Expense SellingAndMarketingExpense	1827000000	USD
CY2016	us-gaap	Selling And Marketing Expense SellingAndMarketingExpense	1751000000	USD
CY2018	dal	Ancillary Businesses And Refinery Expenses AncillaryBusinessesAndRefineryExpenses	1695000000	USD
CY2017	dal	Ancillary Businesses And Refinery Expenses AncillaryBusinessesAndRefineryExpenses	1495000000	USD
CY2016	dal	Ancillary Businesses And Refinery Expenses AncillaryBusinessesAndRefineryExpenses	1182000000	USD
CY2018	us-gaap	Landing Fees And Other Rentals LandingFeesAndOtherRentals	1662000000	USD
CY2017	us-gaap	Landing Fees And Other Rentals LandingFeesAndOtherRentals	1501000000	USD
CY2016	us-gaap	Landing Fees And Other Rentals LandingFeesAndOtherRentals	1472000000	USD
CY2018	us-gaap	Aircraft Maintenance Materials And Repairs AircraftMaintenanceMaterialsAndRepairs	1575000000	USD
CY2017	us-gaap	Aircraft Maintenance Materials And Repairs AircraftMaintenanceMaterialsAndRepairs	1591000000	USD
CY2016	us-gaap	Aircraft Maintenance Materials And Repairs AircraftMaintenanceMaterialsAndRepairs	1434000000	USD
CY2018	us-gaap	Other Labor Related Expenses OtherLaborRelatedExpenses	1301000000	USD
CY2017	us-gaap	Other Labor Related Expenses OtherLaborRelatedExpenses	1065000000	USD
CY2016	us-gaap	Other Labor Related Expenses OtherLaborRelatedExpenses	1115000000	USD
CY2018	us-gaap	Cost Of Services Catering CostOfServicesCatering	1178000000	USD
CY2017	us-gaap	Cost Of Services Catering CostOfServicesCatering	1123000000	USD
CY2016	us-gaap	Cost Of Services Catering CostOfServicesCatering	964000000	USD
CY2018	us-gaap	Aircraft Rental AircraftRental	394000000	USD
CY2017	us-gaap	Aircraft Rental AircraftRental	351000000	USD
CY2016	us-gaap	Aircraft Rental AircraftRental	285000000	USD
CY2018	us-gaap	Other Cost And Expense Operating OtherCostAndExpenseOperating	1723000000	USD
CY2017	us-gaap	Other Cost And Expense Operating OtherCostAndExpenseOperating	1609000000	USD
CY2016	us-gaap	Other Cost And Expense Operating OtherCostAndExpenseOperating	1621000000	USD
CY2018	us-gaap	Operating Expenses OperatingExpenses	39174000000	USD
CY2017	us-gaap	Operating Expenses OperatingExpenses	35172000000	USD
CY2016	us-gaap	Operating Expenses OperatingExpenses	32454000000	USD
CY2018	us-gaap	Operating Income Loss OperatingIncomeLoss	5264000000	USD
CY2017	us-gaap	Operating Income Loss OperatingIncomeLoss	5966000000	USD
CY2016	us-gaap	Operating Income Loss OperatingIncomeLoss	6996000000	USD
CY2018	us-gaap	Interest Income Expense Net InterestIncomeExpenseNet	-311000000	USD
CY2017	us-gaap	Interest Income Expense Net InterestIncomeExpenseNet	-396000000	USD
CY2016	us-gaap	Interest Income Expense Net InterestIncomeExpenseNet	-388000000	USD
CY2018	us-gaap	Gain Loss On Investments GainLossOnInvestments	14000000	USD
CY2017	us-gaap	Gain Loss On Investments GainLossOnInvestments	0	USD
CY2016	us-gaap	Gain Loss On Investments GainLossOnInvestments	0	USD
CY2018	us-gaap	Other Nonoperating Income Expense OtherNonoperatingIncomeExpense	184000000	USD
CY2017	us-gaap	Other Nonoperating Income Expense OtherNonoperatingIncomeExpense	-70000000	USD
CY2016	us-gaap	Other Nonoperating Income Expense OtherNonoperatingIncomeExpense	-255000000	USD
CY2018	us-gaap	Nonoperating Income Expense NonoperatingIncomeExpense	-113000000	USD
CY2017	us-gaap	Nonoperating Income Expense NonoperatingIncomeExpense	-466000000	USD
CY2016	us-gaap	Nonoperating Income Expense NonoperatingIncomeExpense	-643000000	USD
CY2018	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	5151000000	USD
CY2017	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	5500000000	USD
CY2016	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	6353000000	USD
CY2018	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	1216000000	USD
CY2017	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	2295000000	USD
CY2016	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	2158000000	USD
CY2018	us-gaap	Net Income Loss NetIncomeLoss	3935000000	USD
CY2017	us-gaap	Net Income Loss NetIncomeLoss	3205000000	USD
CY2016	us-gaap	Net Income Loss NetIncomeLoss	4195000000	USD
CY2018	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	5.69
CY2017	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	4.45
CY2016	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	5.59
CY2018	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	5.67
CY2017	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	4.43
CY2016	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	5.55
CY2018	us-gaap	Common Stock Dividends Per Share Declared CommonStockDividendsPerShareDeclared	1.31
CY2017	us-gaap	Common Stock Dividends Per Share Declared CommonStockDividendsPerShareDeclared	1.02
CY2016	us-gaap	Common Stock Dividends Per Share Declared CommonStockDividendsPerShareDeclared	0.68
CY2018	us-gaap	Net Income Loss NetIncomeLoss	3935000000	USD
CY2017	us-gaap	Net Income Loss NetIncomeLoss	3205000000	USD
CY2016	us-gaap	Net Income Loss NetIncomeLoss	4195000000	USD
CY2018	us-gaap	Other Comprehensive Income Loss Derivatives Qualifying As Hedges Net Of Tax OtherComprehensiveIncomeLossDerivativesQualifyingAsHedgesNetOfTax	15000000	USD
CY2017	us-gaap	Other Comprehensive Income Loss Derivatives Qualifying As Hedges Net Of Tax OtherComprehensiveIncomeLossDerivativesQualifyingAsHedgesNetOfTax	-29000000	USD
CY2016	us-gaap	Other Comprehensive Income Loss Derivatives Qualifying As Hedges Net Of Tax OtherComprehensiveIncomeLossDerivativesQualifyingAsHedgesNetOfTax	-37000000	USD
CY2018	us-gaap	Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Adjustment Net Of Tax OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentNetOfTax	113000000	USD
CY2017	us-gaap	Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Adjustment Net Of Tax OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentNetOfTax	98000000	USD
CY2016	us-gaap	Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Adjustment Net Of Tax OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentNetOfTax	360000000	USD
CY2018	us-gaap	Other Comprehensive Income Loss Available For Sale Securities Adjustment Net Of Tax OtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentNetOfTax	0	USD
CY2017	us-gaap	Other Comprehensive Income Loss Available For Sale Securities Adjustment Net Of Tax OtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentNetOfTax	142000000	USD
CY2016	us-gaap	Other Comprehensive Income Loss Available For Sale Securities Adjustment Net Of Tax OtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentNetOfTax	36000000	USD
CY2018	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	-98000000	USD
CY2017	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	15000000	USD
CY2016	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	-361000000	USD
CY2018	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	3837000000	USD
CY2017	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	3220000000	USD
CY2016	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	3834000000	USD
CY2017	us-gaap	Net Income Loss NetIncomeLoss	3205000000	USD
CY2018	us-gaap	Net Income Loss NetIncomeLoss	3935000000	USD
CY2016	us-gaap	Net Income Loss NetIncomeLoss	4195000000	USD
CY2018	us-gaap	Depreciation And Amortization DepreciationAndAmortization	2329000000	USD
CY2017	us-gaap	Depreciation And Amortization DepreciationAndAmortization	2222000000	USD
CY2016	us-gaap	Depreciation And Amortization DepreciationAndAmortization	1886000000	USD
CY2018	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	1364000000	USD
CY2017	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	2242000000	USD
CY2016	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	2118000000	USD
CY2018	us-gaap	Pension And Other Postretirement Benefit Contributions PensionAndOtherPostretirementBenefitContributions	790000000	USD
CY2017	us-gaap	Pension And Other Postretirement Benefit Contributions PensionAndOtherPostretirementBenefitContributions	3302000000	USD
CY2016	us-gaap	Pension And Other Postretirement Benefit Contributions PensionAndOtherPostretirementBenefitContributions	717000000	USD
CY2018	us-gaap	Increase Decrease In Receivables IncreaseDecreaseInReceivables	-108000000	USD
CY2017	us-gaap	Increase Decrease In Receivables IncreaseDecreaseInReceivables	428000000	USD
CY2016	us-gaap	Increase Decrease In Receivables IncreaseDecreaseInReceivables	134000000	USD
CY2018	us-gaap	Increase Decrease In Inventories IncreaseDecreaseInInventories	-324000000	USD
CY2017	us-gaap	Increase Decrease In Inventories IncreaseDecreaseInInventories	397000000	USD
CY2016	us-gaap	Increase Decrease In Inventories IncreaseDecreaseInInventories	140000000	USD
CY2018	us-gaap	Increase Decrease In Prepaid Deferred Expense And Other Assets IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets	440000000	USD
CY2017	us-gaap	Increase Decrease In Prepaid Deferred Expense And Other Assets IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets	57000000	USD
CY2016	us-gaap	Increase Decrease In Prepaid Deferred Expense And Other Assets IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets	26000000	USD
CY2018	dal	Increase Decrease In Profit Sharing IncreaseDecreaseInProfitSharing	233000000	USD
CY2017	dal	Increase Decrease In Profit Sharing IncreaseDecreaseInProfitSharing	-51000000	USD
CY2016	dal	Increase Decrease In Profit Sharing IncreaseDecreaseInProfitSharing	-383000000	USD
CY2018	us-gaap	Increase Decrease In Accounts Payable And Accrued Liabilities IncreaseDecreaseInAccountsPayableAndAccruedLiabilities	-418000000	USD
CY2017	us-gaap	Increase Decrease In Accounts Payable And Accrued Liabilities IncreaseDecreaseInAccountsPayableAndAccruedLiabilities	955000000	USD
CY2016	us-gaap	Increase Decrease In Accounts Payable And Accrued Liabilities IncreaseDecreaseInAccountsPayableAndAccruedLiabilities	298000000	USD
CY2018	us-gaap	Other Operating Activities Cash Flow Statement OtherOperatingActivitiesCashFlowStatement	-247000000	USD
CY2017	us-gaap	Other Operating Activities Cash Flow Statement OtherOperatingActivitiesCashFlowStatement	-49000000	USD
CY2016	us-gaap	Other Operating Activities Cash Flow Statement OtherOperatingActivitiesCashFlowStatement	-237000000	USD
CY2018	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	7014000000	USD
CY2017	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	5023000000	USD
CY2016	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	7215000000	USD
CY2018	us-gaap	Payments For Flight Equipment PaymentsForFlightEquipment	3704000000	USD
CY2017	us-gaap	Payments For Flight Equipment PaymentsForFlightEquipment	2704000000	USD
CY2016	us-gaap	Payments For Flight Equipment PaymentsForFlightEquipment	2617000000	USD
CY2018	us-gaap	Payments To Acquire Other Productive Assets PaymentsToAcquireOtherProductiveAssets	1464000000	USD
CY2017	us-gaap	Payments To Acquire Other Productive Assets PaymentsToAcquireOtherProductiveAssets	1187000000	USD
CY2016	us-gaap	Payments To Acquire Other Productive Assets PaymentsToAcquireOtherProductiveAssets	774000000	USD
CY2018	us-gaap	Payments To Acquire Equity Method Investments PaymentsToAcquireEquityMethodInvestments	0	USD
CY2017	us-gaap	Payments To Acquire Equity Method Investments PaymentsToAcquireEquityMethodInvestments	1245000000	USD
CY2016	us-gaap	Payments To Acquire Equity Method Investments PaymentsToAcquireEquityMethodInvestments	0	USD
CY2018	us-gaap	Payments To Acquire Investments PaymentsToAcquireInvestments	145000000	USD
CY2017	us-gaap	Payments To Acquire Investments PaymentsToAcquireInvestments	925000000	USD
CY2016	us-gaap	Payments To Acquire Investments PaymentsToAcquireInvestments	1707000000	USD
CY2018	us-gaap	Proceeds From Sale Maturity And Collections Of Investments ProceedsFromSaleMaturityAndCollectionsOfInvestments	766000000	USD
CY2017	us-gaap	Proceeds From Sale Maturity And Collections Of Investments ProceedsFromSaleMaturityAndCollectionsOfInvestments	584000000	USD
CY2016	us-gaap	Proceeds From Sale Maturity And Collections Of Investments ProceedsFromSaleMaturityAndCollectionsOfInvestments	2686000000	USD
CY2018	us-gaap	Payments For Proceeds From Other Investing Activities PaymentsForProceedsFromOtherInvestingActivities	-154000000	USD
CY2017	us-gaap	Payments For Proceeds From Other Investing Activities PaymentsForProceedsFromOtherInvestingActivities	-211000000	USD
CY2016	us-gaap	Payments For Proceeds From Other Investing Activities PaymentsForProceedsFromOtherInvestingActivities	-257000000	USD
CY2018	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-4393000000	USD
CY2017	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-5266000000	USD
CY2016	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-2155000000	USD
CY2018	us-gaap	Repayments Of Long Term Debt And Capital Securities RepaymentsOfLongTermDebtAndCapitalSecurities	3052000000	USD
CY2017	us-gaap	Repayments Of Long Term Debt And Capital Securities RepaymentsOfLongTermDebtAndCapitalSecurities	1258000000	USD
CY2016	us-gaap	Repayments Of Long Term Debt And Capital Securities RepaymentsOfLongTermDebtAndCapitalSecurities	1709000000	USD
CY2018	us-gaap	Payments For Repurchase Of Common Stock PaymentsForRepurchaseOfCommonStock	1575000000	USD
CY2017	us-gaap	Payments For Repurchase Of Common Stock PaymentsForRepurchaseOfCommonStock	1677000000	USD
CY2016	us-gaap	Payments For Repurchase Of Common Stock PaymentsForRepurchaseOfCommonStock	2601000000	USD
CY2018	us-gaap	Payments Of Dividends PaymentsOfDividends	909000000	USD
CY2017	us-gaap	Payments Of Dividends PaymentsOfDividends	731000000	USD
CY2016	us-gaap	Payments Of Dividends PaymentsOfDividends	509000000	USD
CY2018	us-gaap	Proceeds From Short Term Debt ProceedsFromShortTermDebt	7000000	USD
CY2017	us-gaap	Proceeds From Short Term Debt ProceedsFromShortTermDebt	636000000	USD
CY2016	us-gaap	Proceeds From Short Term Debt ProceedsFromShortTermDebt	211000000	USD
CY2018	us-gaap	Proceeds From Issuance Of Long Term Debt ProceedsFromIssuanceOfLongTermDebt	3745000000	USD
CY2017	us-gaap	Proceeds From Issuance Of Long Term Debt ProceedsFromIssuanceOfLongTermDebt	2454000000	USD
CY2016	us-gaap	Proceeds From Issuance Of Long Term Debt ProceedsFromIssuanceOfLongTermDebt	450000000	USD
CY2018	us-gaap	Proceeds From Payments For Other Financing Activities ProceedsFromPaymentsForOtherFinancingActivities	58000000	USD
CY2017	us-gaap	Proceeds From Payments For Other Financing Activities ProceedsFromPaymentsForOtherFinancingActivities	-154000000	USD
CY2016	us-gaap	Proceeds From Payments For Other Financing Activities ProceedsFromPaymentsForOtherFinancingActivities	-102000000	USD
CY2018	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	-1726000000	USD
CY2017	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	-730000000	USD
CY2016	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	-4260000000	USD
CY2018	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Including Exchange Rate Effect CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect	895000000	USD
CY2017	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Including Exchange Rate Effect CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect	-973000000	USD
CY2016	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Including Exchange Rate Effect CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect	800000000	USD
CY2017Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	1853000000	USD
CY2016Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	2826000000	USD
CY2015Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	2026000000	USD
CY2018Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	2748000000	USD
CY2017Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	1853000000	USD
CY2016Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	2826000000	USD
CY2018	us-gaap	Interest Paid Net InterestPaidNet	376000000	USD
CY2017	us-gaap	Interest Paid Net InterestPaidNet	390000000	USD
CY2016	us-gaap	Interest Paid Net InterestPaidNet	385000000	USD
CY2018	dal	Contribution Of Treasury Stock To Pension Plan Amount Contributed ContributionOfTreasuryStockToPensionPlanAmountContributed	0	USD
CY2017	dal	Contribution Of Treasury Stock To Pension Plan Amount Contributed ContributionOfTreasuryStockToPensionPlanAmountContributed	350000000	USD
CY2016	dal	Contribution Of Treasury Stock To Pension Plan Amount Contributed ContributionOfTreasuryStockToPensionPlanAmountContributed	350000000	USD
CY2018	us-gaap	Capital Lease Obligations Incurred CapitalLeaseObligationsIncurred	100000000	USD
CY2017	us-gaap	Capital Lease Obligations Incurred CapitalLeaseObligationsIncurred	261000000	USD
CY2016	us-gaap	Capital Lease Obligations Incurred CapitalLeaseObligationsIncurred	86000000	USD
CY2018	dal	Operating Lease Obligation Incurred OperatingLeaseObligationIncurred	1041000000	USD
CY2017	dal	Operating Lease Obligation Incurred OperatingLeaseObligationIncurred	0	USD
CY2016	dal	Operating Lease Obligation Incurred OperatingLeaseObligationIncurred	0	USD
CY2018Q4	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	1565000000	USD
CY2017Q4	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	1814000000	USD
CY2016Q4	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	2762000000	USD
CY2018Q4	us-gaap	Restricted Cash RestrictedCash	47000000	USD
CY2017Q4	us-gaap	Restricted Cash RestrictedCash	39000000	USD
CY2016Q4	us-gaap	Restricted Cash RestrictedCash	64000000	USD
CY2018Q4	us-gaap	Restricted Cash And Cash Equivalents Noncurrent RestrictedCashAndCashEquivalentsNoncurrent	1136000000	USD
CY2017Q4	us-gaap	Restricted Cash And Cash Equivalents Noncurrent RestrictedCashAndCashEquivalentsNoncurrent	0	USD
CY2017Q4	us-gaap	Restricted Cash And Cash Equivalents Noncurrent RestrictedCashAndCashEquivalentsNoncurrent	0	USD
CY2018Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	2748000000	USD
CY2017Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	1853000000	USD
CY2016Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	2826000000	USD
CY2015Q4	us-gaap	Stockholders Equity StockholdersEquity	10850000000	USD
CY2016	us-gaap	Net Income Loss NetIncomeLoss	4195000000	USD
CY2016	us-gaap	Cumulative Effect On Retained Earnings Net Of Tax1 CumulativeEffectOnRetainedEarningsNetOfTax1	-735000000	USD
CY2016	us-gaap	Dividends Dividends	509000000	USD
CY2016	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	-361000000	USD
CY2016	us-gaap	Stock Issued During Period Value Share Based Compensation StockIssuedDuringPeriodValueShareBasedCompensation	65000000	USD
CY2016	us-gaap	Stock Issued During Period Value Stock Options Exercised StockIssuedDuringPeriodValueStockOptionsExercised	32000000	USD
CY2016	dal	Treasury Stock Contributedto Qualified Defined Benefit Pension Plan Amount TreasuryStockContributedtoQualifiedDefinedBenefitPensionPlanAmount	343000000	USD
CY2016	us-gaap	Stock Repurchased And Retired During Period Value StockRepurchasedAndRetiredDuringPeriodValue	2601000000	USD
CY2016Q4	us-gaap	Stockholders Equity StockholdersEquity	11279000000	USD
CY2017	us-gaap	Net Income Loss NetIncomeLoss	3205000000	USD
CY2017	us-gaap	Dividends Dividends	731000000	USD
CY2017	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	15000000	USD
CY2017	us-gaap	Stock Issued During Period Value Share Based Compensation StockIssuedDuringPeriodValueShareBasedCompensation	68000000	USD
CY2017	us-gaap	Stock Issued During Period Value Stock Options Exercised StockIssuedDuringPeriodValueStockOptionsExercised	28000000	USD
CY2017	dal	Treasury Stock Contributedto Qualified Defined Benefit Pension Plan Amount TreasuryStockContributedtoQualifiedDefinedBenefitPensionPlanAmount	343000000	USD
CY2017	us-gaap	Stock Repurchased And Retired During Period Value StockRepurchasedAndRetiredDuringPeriodValue	1677000000	USD
CY2017Q4	us-gaap	Stockholders Equity StockholdersEquity	12530000000	USD
CY2018	us-gaap	Net Income Loss NetIncomeLoss	3935000000	USD
CY2018	dal	Cumulative Effect Of Change In Accounting Principle And Other CumulativeEffectOfChangeInAccountingPrincipleAndOther	-260000000	USD
CY2018	us-gaap	Dividends Dividends	909000000	USD
CY2018	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	-98000000	USD
CY2018	us-gaap	Stock Issued During Period Value Share Based Compensation StockIssuedDuringPeriodValueShareBasedCompensation	51000000	USD
CY2018	us-gaap	Stock Issued During Period Value Stock Options Exercised StockIssuedDuringPeriodValueStockOptionsExercised	13000000	USD
CY2018	us-gaap	Stock Repurchased And Retired During Period Value StockRepurchasedAndRetiredDuringPeriodValue	1575000000	USD
CY2018Q4	us-gaap	Stockholders Equity StockholdersEquity	13687000000	USD
CY2018	dal	Voting Rights Thresholdto Consolidate Percentage VotingRightsThresholdtoConsolidatePercentage	0.50
CY2018	us-gaap	Use Of Estimates UseOfEstimates	Use of Estimates<div style="line-height:120%;text-align:left;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;"><br/></span></div>We are required to make estimates and assumptions when preparing our Consolidated Financial Statements in accordance with GAAP. These estimates and assumptions affect the amounts reported in our Consolidated Financial Statements and the accompanying notes. Actual results could differ materially from those estimates.
CY2017	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	41138000000	USD
CY2016	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	39450000000	USD
CY2017	us-gaap	Operating Expenses OperatingExpenses	35172000000	USD
CY2016	us-gaap	Operating Expenses OperatingExpenses	32454000000	USD
CY2017	us-gaap	Nonoperating Income Expense NonoperatingIncomeExpense	-466000000	USD
CY2016	us-gaap	Nonoperating Income Expense NonoperatingIncomeExpense	-643000000	USD
CY2017	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	2295000000	USD
CY2016	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	2158000000	USD
CY2017	us-gaap	Net Income Loss NetIncomeLoss	3205000000	USD
CY2016	us-gaap	Net Income Loss NetIncomeLoss	4195000000	USD
CY2017	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	4.43
CY2016	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	5.55
CY2017Q4	us-gaap	Deferred Income Tax Assets Net DeferredIncomeTaxAssetsNet	1354000000	USD
CY2017Q4	us-gaap	Accrued Liabilities And Other Liabilities AccruedLiabilitiesAndOtherLiabilities	4089000000	USD
CY2017Q4	us-gaap	Retained Earnings Accumulated Deficit RetainedEarningsAccumulatedDeficit	8256000000	USD
CY2018Q4	us-gaap	Accumulated Depreciation Depletion And Amortization Property Plant And Equipment AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment	15823000000	USD
CY2017Q4	us-gaap	Accumulated Depreciation Depletion And Amortization Property Plant And Equipment AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment	14097000000	USD
CY2018Q4	us-gaap	Property Plant And Equipment Net PropertyPlantAndEquipmentNet	28335000000	USD
CY2017Q4	us-gaap	Property Plant And Equipment Net PropertyPlantAndEquipmentNet	26563000000	USD
CY2018	us-gaap	Depreciation Nonproduction DepreciationNonproduction	2300000000	USD
CY2017	us-gaap	Depreciation Nonproduction DepreciationNonproduction	2200000000	USD
CY2016	us-gaap	Depreciation Nonproduction DepreciationNonproduction	1900000000	USD
CY2018	us-gaap	Capitalized Computer Software Amortization1 CapitalizedComputerSoftwareAmortization1	205000000	USD
CY2017	us-gaap	Capitalized Computer Software Amortization1 CapitalizedComputerSoftwareAmortization1	187000000	USD
CY2016	us-gaap	Capitalized Computer Software Amortization1 CapitalizedComputerSoftwareAmortization1	158000000	USD
CY2018Q4	us-gaap	Capitalized Computer Software Net CapitalizedComputerSoftwareNet	819000000	USD
CY2017Q4	us-gaap	Capitalized Computer Software Net CapitalizedComputerSoftwareNet	659000000	USD
CY2018	us-gaap	Property Plant And Equipment Impairment PropertyPlantAndEquipmentImpairment	<span style="font-family:inherit;font-size:10pt;">We review flight equipment and other long-lived assets used in operations for impairment losses when events and circumstances indicate the assets may be impaired. Factors which could be indicators of impairment include, but are not limited to, (1) a decision to permanently remove flight equipment or other long-lived assets from operations, (2) significant changes in the estimated useful life, (3) significant changes in projected cash flows, (4) permanent and significant declines in fleet fair values and (5) changes to the regulatory environment. For long-lived assets held for sale, we discontinue depreciation and record impairment losses when the carrying amount of these assets is greater than the fair value less the cost to sell.</span><div style="line-height:120%;text-align:left;text-indent:18px;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;"><br/></span></div><span style="font-family:inherit;font-size:10pt;">To determine whether impairments exist for aircraft used in operations, we group assets at the fleet-type level or at the contract level for aircraft operated by regional carriers (i.e., the lowest level for which there are identifiable cash flows) and then estimate future cash flows based on projections of capacity, passenger mile yield, fuel costs, labor costs and other relevant factors. If an asset group is impaired, the impairment loss recognized is the amount by which the asset group's carrying amount exceeds its estimated fair value. We estimate aircraft fair values using published sources, appraisals and bids received from third parties, as available.</span>
CY2018	dal	Frequent Flyer Liability Mileage Credits Earned FrequentFlyerLiabilityMileageCreditsEarned	3142000000	USD
CY2018Q4	us-gaap	Short Term Non Bank Loans And Notes Payable ShortTermNonBankLoansAndNotesPayable	1100000000	USD
CY2018	us-gaap	Advertising Cost Policy Expensed Advertising Cost AdvertisingCostPolicyExpensedAdvertisingCost	Advertising Costs<div style="line-height:120%;text-align:left;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;"><br/></span></div>We expense advertising costs in passenger commissions and other selling expenses in the year the advertising first takes place.
CY2018	us-gaap	Advertising Expense AdvertisingExpense	267000000	USD
CY2017	us-gaap	Advertising Expense AdvertisingExpense	273000000	USD
CY2016	us-gaap	Advertising Expense AdvertisingExpense	267000000	USD
CY2018	dal	Sales Of Mileage Credits SalesOfMileageCredits	3500000000	USD
CY2017	dal	Sales Of Mileage Credits SalesOfMileageCredits	3200000000	USD
CY2018Q4	us-gaap	Available For Sale Securities Debt Maturities Single Maturity Date AvailableForSaleSecuritiesDebtMaturitiesSingleMaturityDate	203000000	USD
CY2018Q4	us-gaap	Debt Instrument Carrying Amount DebtInstrumentCarryingAmount	9308000000	USD
CY2017	dal	Frequent Flyer Liability Mileage Credits Earned FrequentFlyerLiabilityMileageCreditsEarned	2948000000	USD
CY2018	dal	Frequent Flyer Liability Travel Mileage Credits Redeemed FrequentFlyerLiabilityTravelMileageCreditsRedeemed	2651000000	USD
CY2017	dal	Frequent Flyer Liability Travel Mileage Credits Redeemed FrequentFlyerLiabilityTravelMileageCreditsRedeemed	2403000000	USD
CY2018	dal	Frequent Flyer Liability Non Travel Mileage Credits Redeemed FrequentFlyerLiabilityNonTravelMileageCreditsRedeemed	171000000	USD
CY2017	dal	Frequent Flyer Liability Non Travel Mileage Credits Redeemed FrequentFlyerLiabilityNonTravelMileageCreditsRedeemed	146000000	USD
CY2018	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	44438000000	USD
CY2017	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	41138000000	USD
CY2016	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	39450000000	USD
CY2018Q4	dal	Proceeds From Contribution Of Assets ProceedsFromContributionOfAssets	40000000	USD
CY2018Q4	us-gaap	Available For Sale Securities Debt Maturities Within One Year Fair Value AvailableForSaleSecuritiesDebtMaturitiesWithinOneYearFairValue	93000000	USD
CY2018Q4	dal	Available For Sale Securities Debt Maturities After One Year Through Three Years Fair Value AvailableForSaleSecuritiesDebtMaturitiesAfterOneYearThroughThreeYearsFairValue	96000000	USD
CY2018Q4	dal	Available For Sale Securities Debt Maturities After Three Years Through Five Years Fair Value AvailableForSaleSecuritiesDebtMaturitiesAfterThreeYearsThroughFiveYearsFairValue	1000000	USD
CY2018Q4	dal	Available For Sale Securities Debt Maturities After Five Years Fair Value AvailableForSaleSecuritiesDebtMaturitiesAfterFiveYearsFairValue	13000000	USD
CY2018	us-gaap	Gain Loss On Investments GainLossOnInvestments	14000000	USD
CY2018Q4	dal	Proceeds From Contribution Of Assets ProceedsFromContributionOfAssets	40000000	USD
CY2018Q4	us-gaap	Deconsolidation Gain Or Loss Amount DeconsolidationGainOrLossAmount	91000000	USD
CY2018Q4	us-gaap	Derivative Fair Value Of Derivative Net DerivativeFairValueOfDerivativeNet	13000000	USD
CY2017Q4	us-gaap	Derivative Fair Value Of Derivative Net DerivativeFairValueOfDerivativeNet	-83000000	USD
CY2018Q4	us-gaap	Derivative Fair Value Of Derivative Net DerivativeFairValueOfDerivativeNet	13000000	USD
CY2017Q4	us-gaap	Derivative Fair Value Of Derivative Net DerivativeFairValueOfDerivativeNet	-83000000	USD
CY2018Q4	us-gaap	Derivative Collateral Obligation To Return Cash DerivativeCollateralObligationToReturnCash	9000000	USD
CY2017Q4	us-gaap	Derivative Collateral Right To Reclaim Cash DerivativeCollateralRightToReclaimCash	43000000	USD
CY2018Q4	us-gaap	Indefinite Lived Intangible Assets Excluding Goodwill IndefiniteLivedIntangibleAssetsExcludingGoodwill	4716000000	USD
CY2017Q4	us-gaap	Indefinite Lived Intangible Assets Excluding Goodwill IndefiniteLivedIntangibleAssetsExcludingGoodwill	4716000000	USD
CY2018Q4	us-gaap	Finite Lived Intangible Assets Gross FiniteLivedIntangibleAssetsGross	976000000	USD
CY2018Q4	us-gaap	Finite Lived Intangible Assets Accumulated Amortization FiniteLivedIntangibleAssetsAccumulatedAmortization	862000000	USD
CY2017Q4	us-gaap	Finite Lived Intangible Assets Gross FiniteLivedIntangibleAssetsGross	976000000	USD
CY2017Q4	us-gaap	Finite Lived Intangible Assets Accumulated Amortization FiniteLivedIntangibleAssetsAccumulatedAmortization	845000000	USD
CY2018	us-gaap	Amortization Of Intangible Assets AmortizationOfIntangibleAssets	17000000	USD
CY2018Q4	us-gaap	Finite Lived Intangible Assets Amortization Expense Next Twelve Months FiniteLivedIntangibleAssetsAmortizationExpenseNextTwelveMonths	15000000	USD
CY2017Q4	us-gaap	Debt Instrument Carrying Amount DebtInstrumentCarryingAmount	8539000000	USD
CY2018Q4	us-gaap	Debt Instrument Unamortized Discount Premium And Debt Issuance Costs Net DebtInstrumentUnamortizedDiscountPremiumAndDebtIssuanceCostsNet	-60000000	USD
CY2017Q4	us-gaap	Debt Instrument Unamortized Discount Premium And Debt Issuance Costs Net DebtInstrumentUnamortizedDiscountPremiumAndDebtIssuanceCostsNet	99000000	USD
CY2018Q4	us-gaap	Long Term Debt LongTermDebt	9368000000	USD
CY2017Q4	us-gaap	Long Term Debt LongTermDebt	8440000000	USD
CY2018Q4	us-gaap	Long Term Debt Current LongTermDebtCurrent	1409000000	USD
CY2017Q4	us-gaap	Long Term Debt Current LongTermDebtCurrent	2145000000	USD
CY2018Q4	us-gaap	Long Term Debt Noncurrent LongTermDebtNoncurrent	7959000000	USD
CY2017Q4	us-gaap	Long Term Debt Noncurrent LongTermDebtNoncurrent	6295000000	USD
CY2018Q2	dal	Number Of Rating Agencies NumberOfRatingAgencies	2	rating_agency
CY2018Q4	us-gaap	Line Of Credit Facility Current Borrowing Capacity LineOfCreditFacilityCurrentBorrowingCapacity	3030000000	USD
CY2018Q4	us-gaap	Long Term Debt Maturities Repayments Of Principal In Next Twelve Months LongTermDebtMaturitiesRepaymentsOfPrincipalInNextTwelveMonths	1441000000	USD
CY2018Q4	dal	Debt Instrument Unamortized Discount Premium And Debt Issuance Costs Net Year One DebtInstrumentUnamortizedDiscountPremiumAndDebtIssuanceCostsNetYearOne	22000000	USD
CY2018Q4	us-gaap	Long Term Debt Maturities Repayments Of Principal In Year Two LongTermDebtMaturitiesRepaymentsOfPrincipalInYearTwo	2048000000	USD
CY2018Q4	dal	Debt Instrument Unamortized Discount Premium And Debt Issuance Costs Net Year Two DebtInstrumentUnamortizedDiscountPremiumAndDebtIssuanceCostsNetYearTwo	-2000000	USD
CY2018Q4	us-gaap	Long Term Debt Maturities Repayments Of Principal In Year Three LongTermDebtMaturitiesRepaymentsOfPrincipalInYearThree	1019000000	USD
CY2018Q4	dal	Debt Instrument Unamortized Discount Premium And Debt Issuance Costs Net Year Three DebtInstrumentUnamortizedDiscountPremiumAndDebtIssuanceCostsNetYearThree	-7000000	USD
CY2018Q4	us-gaap	Long Term Debt Maturities Repayments Of Principal In Year Four LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFour	1676000000	USD
CY2018Q4	dal	Debt Instrument Unamortized Discount Premium And Debt Issuance Costs Net Year Four DebtInstrumentUnamortizedDiscountPremiumAndDebtIssuanceCostsNetYearFour	-11000000	USD
CY2018Q4	us-gaap	Long Term Debt Maturities Repayments Of Principal In Year Five LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFive	929000000	USD
CY2018Q4	dal	Debt Instrument Unamortized Discount Premium And Debt Issuance Costs Net Year Five DebtInstrumentUnamortizedDiscountPremiumAndDebtIssuanceCostsNetYearFive	-9000000	USD
CY2018Q4	us-gaap	Long Term Debt Maturities Repayments Of Principal After Year Five LongTermDebtMaturitiesRepaymentsOfPrincipalAfterYearFive	2195000000	USD
CY2018Q4	dal	Debt Instrument Unamortized Discount Premium And Debt Issuance Costs Net After Year Five DebtInstrumentUnamortizedDiscountPremiumAndDebtIssuanceCostsNetAfterYearFive	-53000000	USD
CY2018Q4	us-gaap	Debt Instrument Carrying Amount DebtInstrumentCarryingAmount	9308000000	USD
CY2018Q4	us-gaap	Debt Instrument Unamortized Discount Premium And Debt Issuance Costs Net DebtInstrumentUnamortizedDiscountPremiumAndDebtIssuanceCostsNet	-60000000	USD
CY2018Q4	us-gaap	Long Term Debt LongTermDebt	9368000000	USD
CY2018	us-gaap	Finance Lease Interest Expense FinanceLeaseInterestExpense	22000000	USD
CY2018Q4	us-gaap	Debt Instrument Carrying Amount DebtInstrumentCarryingAmount	9308000000	USD
CY2017Q4	us-gaap	Debt Instrument Carrying Amount DebtInstrumentCarryingAmount	8539000000	USD
CY2018Q4	us-gaap	Debt Instrument Unamortized Discount Premium And Debt Issuance Costs Net DebtInstrumentUnamortizedDiscountPremiumAndDebtIssuanceCostsNet	-60000000	USD
CY2017Q4	us-gaap	Debt Instrument Unamortized Discount Premium And Debt Issuance Costs Net DebtInstrumentUnamortizedDiscountPremiumAndDebtIssuanceCostsNet	99000000	USD
CY2018Q4	us-gaap	Long Term Debt LongTermDebt	9368000000	USD
CY2017Q4	us-gaap	Long Term Debt LongTermDebt	8440000000	USD
CY2018Q4	us-gaap	Long Term Debt Fair Value LongTermDebtFairValue	9400000000	USD
CY2017Q4	us-gaap	Long Term Debt Fair Value LongTermDebtFairValue	8700000000	USD
CY2018Q1	dal	Number Of Aircraft Parked But Not Permanently Retired NumberOfAircraftParkedButNotPermanentlyRetired	43	aircraft
CY2018Q4	us-gaap	Operating Lease Right Of Use Asset OperatingLeaseRightOfUseAsset	5994000000	USD
CY2018Q4	us-gaap	Finance Lease Right Of Use Asset FinanceLeaseRightOfUseAsset	490000000	USD
CY2018Q4	dal	Lease Rightof Use Asset LeaseRightofUseAsset	6484000000	USD
CY2018Q4	us-gaap	Operating Lease Liability Current OperatingLeaseLiabilityCurrent	955000000	USD
CY2018Q4	us-gaap	Finance Lease Liability Current FinanceLeaseLiabilityCurrent	109000000	USD
CY2018Q4	us-gaap	Operating Lease Liability Noncurrent OperatingLeaseLiabilityNoncurrent	5801000000	USD
CY2018Q4	us-gaap	Finance Lease Liability Noncurrent FinanceLeaseLiabilityNoncurrent	294000000	USD
CY2018Q4	dal	Lease Liability LeaseLiability	7159000000	USD
CY2018Q4	us-gaap	Operating Lease Weighted Average Remaining Lease Term1 OperatingLeaseWeightedAverageRemainingLeaseTerm1	P12Y
CY2018Q4	us-gaap	Finance Lease Weighted Average Remaining Lease Term1 FinanceLeaseWeightedAverageRemainingLeaseTerm1	P7Y
CY2018Q4	us-gaap	Operating Lease Weighted Average Discount Rate Percent OperatingLeaseWeightedAverageDiscountRatePercent	0.0369
CY2018Q4	us-gaap	Finance Lease Weighted Average Discount Rate Percent FinanceLeaseWeightedAverageDiscountRatePercent	0.0523
CY2018	us-gaap	Finance Lease Right Of Use Asset Amortization FinanceLeaseRightOfUseAssetAmortization	100000000	USD
CY2018	us-gaap	Operating Lease Cost OperatingLeaseCost	994000000	USD
CY2018	us-gaap	Short Term Lease Cost ShortTermLeaseCost	458000000	USD
CY2018	us-gaap	Variable Lease Cost VariableLeaseCost	1427000000	USD
CY2018	us-gaap	Lease Cost LeaseCost	3001000000	USD
CY2018	us-gaap	Operating Lease Payments OperatingLeasePayments	1271000000	USD
CY2018	us-gaap	Finance Lease Interest Payment On Liability FinanceLeaseInterestPaymentOnLiability	22000000	USD
CY2018	us-gaap	Finance Lease Principal Payments FinanceLeasePrincipalPayments	108000000	USD
CY2018Q4	us-gaap	Lessee Operating Lease Liability Payments Due Next Twelve Months LesseeOperatingLeaseLiabilityPaymentsDueNextTwelveMonths	1172000000	USD
CY2018Q4	us-gaap	Finance Lease Liability Payments Due Next Twelve Months FinanceLeaseLiabilityPaymentsDueNextTwelveMonths	127000000	USD
CY2018Q4	us-gaap	Lessee Operating Lease Liability Payments Due Year Two LesseeOperatingLeaseLiabilityPaymentsDueYearTwo	1000000000	USD
CY2018Q4	us-gaap	Finance Lease Liability Payments Due Year Two FinanceLeaseLiabilityPaymentsDueYearTwo	89000000	USD
CY2018Q4	us-gaap	Lessee Operating Lease Liability Payments Due Year Three LesseeOperatingLeaseLiabilityPaymentsDueYearThree	819000000	USD
CY2018Q4	us-gaap	Finance Lease Liability Payments Due Year Three FinanceLeaseLiabilityPaymentsDueYearThree	75000000	USD
CY2018Q4	us-gaap	Lessee Operating Lease Liability Payments Due Year Four LesseeOperatingLeaseLiabilityPaymentsDueYearFour	692000000	USD
CY2018Q4	us-gaap	Finance Lease Liability Payments Due Year Four FinanceLeaseLiabilityPaymentsDueYearFour	33000000	USD
CY2018Q4	us-gaap	Lessee Operating Lease Liability Payments Due Year Five LesseeOperatingLeaseLiabilityPaymentsDueYearFive	654000000	USD
CY2018Q4	us-gaap	Finance Lease Liability Payments Due Year Five FinanceLeaseLiabilityPaymentsDueYearFive	27000000	USD
CY2018Q4	us-gaap	Lessee Operating Lease Liability Payments Due After Year Five LesseeOperatingLeaseLiabilityPaymentsDueAfterYearFive	4200000000	USD
CY2018Q4	us-gaap	Finance Lease Liability Payments Due After Year Five FinanceLeaseLiabilityPaymentsDueAfterYearFive	111000000	USD
CY2018Q4	us-gaap	Lessee Operating Lease Liability Payments Due LesseeOperatingLeaseLiabilityPaymentsDue	8537000000	USD
CY2018Q4	us-gaap	Finance Lease Liability Payments Due FinanceLeaseLiabilityPaymentsDue	462000000	USD
CY2018Q4	us-gaap	Lessee Operating Lease Liability Undiscounted Excess Amount LesseeOperatingLeaseLiabilityUndiscountedExcessAmount	1781000000	USD
CY2018Q4	us-gaap	Finance Lease Liability Undiscounted Excess Amount FinanceLeaseLiabilityUndiscountedExcessAmount	59000000	USD
CY2018Q4	us-gaap	Operating Lease Liability OperatingLeaseLiability	6756000000	USD
CY2018Q4	us-gaap	Finance Lease Liability FinanceLeaseLiability	403000000	USD
CY2018Q4	us-gaap	Operating Lease Liability Current OperatingLeaseLiabilityCurrent	955000000	USD
CY2018Q4	us-gaap	Finance Lease Liability Current FinanceLeaseLiabilityCurrent	109000000	USD
CY2018Q4	us-gaap	Operating Lease Liability Noncurrent OperatingLeaseLiabilityNoncurrent	5801000000	USD
CY2018Q4	us-gaap	Finance Lease Liability Noncurrent FinanceLeaseLiabilityNoncurrent	294000000	USD
CY2018Q4	dal	Lessee Finance Lease And Operating Lease Lease Not Yet Commenced Amount LesseeFinanceLeaseAndOperatingLeaseLeaseNotYetCommencedAmount	189000000	USD
CY2010Q4	dal	Special Project Bonds Face Amount Issued By Others SpecialProjectBondsFaceAmountIssuedByOthers	800000000	USD
CY2018	dal	Unfunded Liability Defined Benefit Plan Interest Rate UnfundedLiabilityDefinedBenefitPlanInterestRate	0.0885
CY2018Q4	us-gaap	Defined Benefit Plan Expected Future Employer Contributions Next Fiscal Year DefinedBenefitPlanExpectedFutureEmployerContributionsNextFiscalYear	500000000	USD
CY2018	us-gaap	Defined Contribution Plan Cost Recognized DefinedContributionPlanCostRecognized	926000000	USD
CY2017	us-gaap	Defined Contribution Plan Cost Recognized DefinedContributionPlanCostRecognized	875000000	USD
CY2016	us-gaap	Defined Contribution Plan Cost Recognized DefinedContributionPlanCostRecognized	733000000	USD
CY2018	dal	Assumed Health Care Plan Pre Age AssumedHealthCarePlanPreAge	P65Y
CY2018	dal	Assumed Health Care Plan Post Age AssumedHealthCarePlanPostAge	P65Y
CY2018Q4	us-gaap	Defined Benefit Plan Expected Amortization Next Fiscal Year DefinedBenefitPlanExpectedAmortizationNextFiscalYear	320000000	USD
CY2018Q4	us-gaap	Defined Benefit Plan Assumptions Used Calculating Benefit Obligation Discount Rate DefinedBenefitPlanAssumptionsUsedCalculatingBenefitObligationDiscountRate	0.0433
CY2017Q4	us-gaap	Defined Benefit Plan Assumptions Used Calculating Benefit Obligation Discount Rate DefinedBenefitPlanAssumptionsUsedCalculatingBenefitObligationDiscountRate	0.0369
CY2018	us-gaap	Defined Benefit Plan Assumptions Used Calculating Net Periodic Benefit Cost Expected Long Term Return On Assets DefinedBenefitPlanAssumptionsUsedCalculatingNetPeriodicBenefitCostExpectedLongTermReturnOnAssets	0.0897
CY2017	us-gaap	Defined Benefit Plan Assumptions Used Calculating Net Periodic Benefit Cost Expected Long Term Return On Assets DefinedBenefitPlanAssumptionsUsedCalculatingNetPeriodicBenefitCostExpectedLongTermReturnOnAssets	0.0896
CY2016	us-gaap	Defined Benefit Plan Assumptions Used Calculating Net Periodic Benefit Cost Expected Long Term Return On Assets DefinedBenefitPlanAssumptionsUsedCalculatingNetPeriodicBenefitCostExpectedLongTermReturnOnAssets	0.0894
CY2018Q4	us-gaap	Defined Benefit Plan Health Care Cost Trend Rate Assumed Next Fiscal Year DefinedBenefitPlanHealthCareCostTrendRateAssumedNextFiscalYear	0.0675
CY2017Q4	us-gaap	Defined Benefit Plan Health Care Cost Trend Rate Assumed Next Fiscal Year DefinedBenefitPlanHealthCareCostTrendRateAssumedNextFiscalYear	0.0700
CY2016Q4	us-gaap	Defined Benefit Plan Health Care Cost Trend Rate Assumed Next Fiscal Year DefinedBenefitPlanHealthCareCostTrendRateAssumedNextFiscalYear	0.0650
CY2018Q4	us-gaap	Defined Benefit Plan Ultimate Health Care Cost Trend Rate1 DefinedBenefitPlanUltimateHealthCareCostTrendRate1	0.0500
CY2018	us-gaap	Defined Benefit Plan Assumptions Used Calculating Net Periodic Benefit Cost Expected Long Term Return On Assets DefinedBenefitPlanAssumptionsUsedCalculatingNetPeriodicBenefitCostExpectedLongTermReturnOnAssets	0.0897
CY2018	dal	Defined Benefit Plan Percent Change Assumed In Health Care Cost Trend Metric DefinedBenefitPlanPercentChangeAssumedInHealthCareCostTrendMetric	0.01
CY2018	us-gaap	Other Labor Related Expenses OtherLaborRelatedExpenses	1300000000	USD
CY2017	us-gaap	Other Labor Related Expenses OtherLaborRelatedExpenses	1100000000	USD
CY2016	us-gaap	Other Labor Related Expenses OtherLaborRelatedExpenses	1100000000	USD
CY2018Q4	dei	Entity Number Of Employees EntityNumberOfEmployees	89000	employee
CY2018Q4	dal	Percentage Of Employees Represented By Unions Under Collective Bargaining Agreements PercentageOfEmployeesRepresentedByUnionsUnderCollectiveBargainingAgreements	0.19
CY2018	us-gaap	Current Federal Tax Expense Benefit CurrentFederalTaxExpenseBenefit	-187000000	USD
CY2017	us-gaap	Current Federal Tax Expense Benefit CurrentFederalTaxExpenseBenefit	4000000	USD
CY2016	us-gaap	Current Federal Tax Expense Benefit CurrentFederalTaxExpenseBenefit	0	USD
CY2018	us-gaap	Current State And Local Tax Expense Benefit CurrentStateAndLocalTaxExpenseBenefit	26000000	USD
CY2017	us-gaap	Current State And Local Tax Expense Benefit CurrentStateAndLocalTaxExpenseBenefit	-5000000	USD
CY2016	us-gaap	Current State And Local Tax Expense Benefit CurrentStateAndLocalTaxExpenseBenefit	28000000	USD
CY2018	us-gaap	Current Foreign Tax Expense Benefit CurrentForeignTaxExpenseBenefit	13000000	USD
CY2017	us-gaap	Current Foreign Tax Expense Benefit CurrentForeignTaxExpenseBenefit	54000000	USD
CY2016	us-gaap	Current Foreign Tax Expense Benefit CurrentForeignTaxExpenseBenefit	12000000	USD
CY2018	us-gaap	Deferred Federal Income Tax Expense Benefit DeferredFederalIncomeTaxExpenseBenefit	1226000000	USD
CY2017	us-gaap	Deferred Federal Income Tax Expense Benefit DeferredFederalIncomeTaxExpenseBenefit	2093000000	USD
CY2016	us-gaap	Deferred Federal Income Tax Expense Benefit DeferredFederalIncomeTaxExpenseBenefit	1990000000	USD
CY2018	us-gaap	Deferred State And Local Income Tax Expense Benefit DeferredStateAndLocalIncomeTaxExpenseBenefit	138000000	USD
CY2017	us-gaap	Deferred State And Local Income Tax Expense Benefit DeferredStateAndLocalIncomeTaxExpenseBenefit	149000000	USD
CY2016	us-gaap	Deferred State And Local Income Tax Expense Benefit DeferredStateAndLocalIncomeTaxExpenseBenefit	128000000	USD
CY2018	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	1216000000	USD
CY2017	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	2295000000	USD
CY2016	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	2158000000	USD
CY2018	us-gaap	Effective Income Tax Rate Reconciliation At Federal Statutory Income Tax Rate EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate	0.210
CY2017	us-gaap	Effective Income Tax Rate Reconciliation At Federal Statutory Income Tax Rate EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate	0.350
CY2016	us-gaap	Effective Income Tax Rate Reconciliation At Federal Statutory Income Tax Rate EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate	0.350
CY2018	us-gaap	Effective Income Tax Rate Reconciliation State And Local Income Taxes EffectiveIncomeTaxRateReconciliationStateAndLocalIncomeTaxes	0.025
CY2017	us-gaap	Effective Income Tax Rate Reconciliation State And Local Income Taxes EffectiveIncomeTaxRateReconciliationStateAndLocalIncomeTaxes	0.018
CY2016	us-gaap	Effective Income Tax Rate Reconciliation State And Local Income Taxes EffectiveIncomeTaxRateReconciliationStateAndLocalIncomeTaxes	0.018
CY2018	us-gaap	Effective Income Tax Rate Reconciliation Foreign Income Tax Rate Differential EffectiveIncomeTaxRateReconciliationForeignIncomeTaxRateDifferential	0.001
CY2017	us-gaap	Effective Income Tax Rate Reconciliation Foreign Income Tax Rate Differential EffectiveIncomeTaxRateReconciliationForeignIncomeTaxRateDifferential	-0.022
CY2016	us-gaap	Effective Income Tax Rate Reconciliation Foreign Income Tax Rate Differential EffectiveIncomeTaxRateReconciliationForeignIncomeTaxRateDifferential	-0.021
CY2018	dal	Effective Income Tax Rate Reconciliation Tax Cuts And Jobs Actof2017 Percent EffectiveIncomeTaxRateReconciliationTaxCutsAndJobsActof2017Percent	-0.005
CY2017	dal	Effective Income Tax Rate Reconciliation Tax Cuts And Jobs Actof2017 Percent EffectiveIncomeTaxRateReconciliationTaxCutsAndJobsActof2017Percent	0.072
CY2016	dal	Effective Income Tax Rate Reconciliation Tax Cuts And Jobs Actof2017 Percent EffectiveIncomeTaxRateReconciliationTaxCutsAndJobsActof2017Percent	0
CY2018	us-gaap	Effective Income Tax Rate Reconciliation Other Adjustments EffectiveIncomeTaxRateReconciliationOtherAdjustments	0.005
CY2017	us-gaap	Effective Income Tax Rate Reconciliation Other Adjustments EffectiveIncomeTaxRateReconciliationOtherAdjustments	0
CY2016	us-gaap	Effective Income Tax Rate Reconciliation Other Adjustments EffectiveIncomeTaxRateReconciliationOtherAdjustments	-0.007
CY2018	us-gaap	Effective Income Tax Rate Continuing Operations EffectiveIncomeTaxRateContinuingOperations	0.236
CY2017	us-gaap	Effective Income Tax Rate Continuing Operations EffectiveIncomeTaxRateContinuingOperations	0.418
CY2016	us-gaap	Effective Income Tax Rate Continuing Operations EffectiveIncomeTaxRateContinuingOperations	0.340
CY2017Q4	dal	Tax Cutsand Jobs Actof2017 Incomplete Accounting Provisional Income Tax Expense Benefit TaxCutsandJobsActof2017IncompleteAccountingProvisionalIncomeTaxExpenseBenefit	395000000	USD
CY2017Q4	dal	Effective Income Tax Rate Reconciliation Tax Cuts And Jobs Actof2017 Percent EffectiveIncomeTaxRateReconciliationTaxCutsAndJobsActof2017Percent	0.072
CY2018	dal	Tax Cutsand Jobs Actof2017 Income Tax Expense Benefit TaxCutsandJobsActof2017IncomeTaxExpenseBenefit	26000000	USD
CY2018	dal	Effective Income Tax Rate Reconciliation Tax Cuts And Jobs Actof2017 Percent EffectiveIncomeTaxRateReconciliationTaxCutsAndJobsActof2017Percent	-0.005
CY2017Q4	dal	Tax Cutsand Jobs Actof2017 Incomplete Accounting Provisional Undistributed Accumulated Earningsof Foreign Subsidiary TaxCutsandJobsActof2017IncompleteAccountingProvisionalUndistributedAccumulatedEarningsofForeignSubsidiary	522000000	USD
CY2018Q4	us-gaap	Deferred Tax Liabilities Undistributed Foreign Earnings DeferredTaxLiabilitiesUndistributedForeignEarnings	160000000	USD
CY2018Q4	us-gaap	Deferred Tax Assets Operating Loss Carryforwards DeferredTaxAssetsOperatingLossCarryforwards	674000000	USD
CY2017Q4	us-gaap	Deferred Tax Assets Operating Loss Carryforwards DeferredTaxAssetsOperatingLossCarryforwards	1297000000	USD
CY2018Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Compensation And Benefits DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefits	2435000000	USD
CY2017Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Compensation And Benefits DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefits	2544000000	USD
CY2018Q4	us-gaap	Deferred Tax Assets Tax Credit Carryforwards Alternative Minimum Tax DeferredTaxAssetsTaxCreditCarryforwardsAlternativeMinimumTax	189000000	USD
CY2017Q4	us-gaap	Deferred Tax Assets Tax Credit Carryforwards Alternative Minimum Tax DeferredTaxAssetsTaxCreditCarryforwardsAlternativeMinimumTax	379000000	USD
CY2018Q4	us-gaap	Deferred Tax Assets Deferred Income DeferredTaxAssetsDeferredIncome	1620000000	USD
CY2017Q4	us-gaap	Deferred Tax Assets Deferred Income DeferredTaxAssetsDeferredIncome	1416000000	USD
CY2018Q4	dal	Deferred Tax Assets Operating Lease Liabilities DeferredTaxAssetsOperatingLeaseLiabilities	1579000000	USD
CY2017Q4	dal	Deferred Tax Assets Operating Lease Liabilities DeferredTaxAssetsOperatingLeaseLiabilities	0	USD
CY2018Q4	us-gaap	Deferred Tax Assets Other DeferredTaxAssetsOther	357000000	USD
CY2017Q4	us-gaap	Deferred Tax Assets Other DeferredTaxAssetsOther	728000000	USD
CY2018Q4	us-gaap	Deferred Tax Assets Valuation Allowance DeferredTaxAssetsValuationAllowance	13000000	USD
CY2017Q4	us-gaap	Deferred Tax Assets Valuation Allowance DeferredTaxAssetsValuationAllowance	15000000	USD
CY2018Q4	us-gaap	Deferred Tax Assets Net DeferredTaxAssetsNet	6841000000	USD
CY2017Q4	us-gaap	Deferred Tax Assets Net DeferredTaxAssetsNet	6349000000	USD
CY2018Q4	us-gaap	Deferred Tax Liabilities Property Plant And Equipment DeferredTaxLiabilitiesPropertyPlantAndEquipment	4185000000	USD
CY2017Q4	us-gaap	Deferred Tax Liabilities Property Plant And Equipment DeferredTaxLiabilitiesPropertyPlantAndEquipment	3847000000	USD
CY2018Q4	dal	Deferred Tax Liabilities Operating Lease Right Of Use Assets DeferredTaxLiabilitiesOperatingLeaseRightOfUseAssets	1388000000	USD
CY2017Q4	dal	Deferred Tax Liabilities Operating Lease Right Of Use Assets DeferredTaxLiabilitiesOperatingLeaseRightOfUseAssets	0	USD
CY2018Q4	us-gaap	Deferred Tax Liabilities Goodwill And Intangible Assets Intangible Assets DeferredTaxLiabilitiesGoodwillAndIntangibleAssetsIntangibleAssets	1052000000	USD
CY2017Q4	us-gaap	Deferred Tax Liabilities Goodwill And Intangible Assets Intangible Assets DeferredTaxLiabilitiesGoodwillAndIntangibleAssetsIntangibleAssets	1043000000	USD
CY2018Q4	us-gaap	Deferred Tax Liabilities Other DeferredTaxLiabilitiesOther	137000000	USD
CY2017Q4	us-gaap	Deferred Tax Liabilities Other DeferredTaxLiabilitiesOther	105000000	USD
CY2018Q4	us-gaap	Deferred Income Tax Liabilities DeferredIncomeTaxLiabilities	6762000000	USD
CY2017Q4	us-gaap	Deferred Income Tax Liabilities DeferredIncomeTaxLiabilities	4995000000	USD
CY2018Q4	us-gaap	Deferred Tax Assets Liabilities Net DeferredTaxAssetsLiabilitiesNet	79000000	USD
CY2017Q4	us-gaap	Deferred Tax Assets Liabilities Net DeferredTaxAssetsLiabilitiesNet	1354000000	USD
CY2018Q4	us-gaap	Deferred Tax Assets Liabilities Net DeferredTaxAssetsLiabilitiesNet	79000000	USD
CY2018Q4	us-gaap	Deferred Income Tax Assets Net DeferredIncomeTaxAssetsNet	242000000	USD
CY2018Q4	us-gaap	Deferred Income Tax Liabilities Net DeferredIncomeTaxLiabilitiesNet	163000000	USD
CY2018Q4	us-gaap	Deferred Tax Assets Tax Credit Carryforwards Alternative Minimum Tax DeferredTaxAssetsTaxCreditCarryforwardsAlternativeMinimumTax	189000000	USD
CY2018Q4	us-gaap	Operating Loss Carryforwards OperatingLossCarryforwards	2200000000	USD
CY2018	dal	Deferred Income Tax Expense Benefit Pension Obligation DeferredIncomeTaxExpenseBenefitPensionObligation	688000000	USD
CY2018	dal	Pension Obligation Time Frame For Extinguishment PensionObligationTimeFrameForExtinguishment	P25Y
CY2018Q4	dal	Capital Stock Shares Authorized CapitalStockSharesAuthorized	2000000000.0	shares
CY2018Q4	us-gaap	Common Stock Shares Authorized CommonStockSharesAuthorized	1500000000	shares
CY2018Q4	us-gaap	Common Stock Par Or Stated Value Per Share CommonStockParOrStatedValuePerShare	0.0001
CY2018Q4	us-gaap	Preferred Stock Shares Authorized PreferredStockSharesAuthorized	500000000	shares
CY2018	us-gaap	Treasury Stock Acquired Average Cost Per Share TreasuryStockAcquiredAverageCostPerShare	24.14
CY2017	us-gaap	Treasury Stock Acquired Average Cost Per Share TreasuryStockAcquiredAverageCostPerShare	21.19
CY2018Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Number Of Shares Authorized ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAuthorized	163000000	shares
CY2018Q4	us-gaap	Common Stock Capital Shares Reserved For Future Issuance CommonStockCapitalSharesReservedForFutureIssuance	27000000	shares
CY2018	us-gaap	Share Based Compensation ShareBasedCompensation	159000000	USD
CY2017	us-gaap	Share Based Compensation ShareBasedCompensation	169000000	USD
CY2016	us-gaap	Share Based Compensation ShareBasedCompensation	154000000	USD
CY2018Q4	us-gaap	Employee Service Share Based Compensation Nonvested Awards Total Compensation Cost Not Yet Recognized EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized	81000000	USD
CY2018Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Nonvested Number ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber	2400000	shares
CY2018Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Number ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber	2500000	shares
CY2018Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Exercisable Weighted Average Exercise Price ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableWeightedAverageExercisePrice	48.99
CY2018Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Exercisable Number ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableNumber	616000	shares
CY2018	us-gaap	Effective Income Tax Rate Reconciliation Share Based Compensation Excess Tax Benefit Amount EffectiveIncomeTaxRateReconciliationShareBasedCompensationExcessTaxBenefitAmount	7000000	USD
CY2017	us-gaap	Effective Income Tax Rate Reconciliation Share Based Compensation Excess Tax Benefit Amount EffectiveIncomeTaxRateReconciliationShareBasedCompensationExcessTaxBenefitAmount	21000000	USD
CY2016	us-gaap	Other Comprehensive Income Loss Before Reclassifications Net Of Tax OtherComprehensiveIncomeLossBeforeReclassificationsNetOfTax	-459000000	USD
CY2016	us-gaap	Reclassification From Accumulated Other Comprehensive Income Current Period Net Of Tax ReclassificationFromAccumulatedOtherComprehensiveIncomeCurrentPeriodNetOfTax	-98000000	USD
CY2017	us-gaap	Other Comprehensive Income Loss Before Reclassifications Net Of Tax OtherComprehensiveIncomeLossBeforeReclassificationsNetOfTax	-137000000	USD
CY2017	us-gaap	Reclassification From Accumulated Other Comprehensive Income Current Period Net Of Tax ReclassificationFromAccumulatedOtherComprehensiveIncomeCurrentPeriodNetOfTax	-152000000	USD
CY2018	us-gaap	Other Comprehensive Income Loss Before Reclassifications Net Of Tax OtherComprehensiveIncomeLossBeforeReclassificationsNetOfTax	-287000000	USD
CY2018	us-gaap	Reclassification From Accumulated Other Comprehensive Income Current Period Net Of Tax ReclassificationFromAccumulatedOtherComprehensiveIncomeCurrentPeriodNetOfTax	-189000000	USD
CY2018	dal	Deferred Income Tax Expense Benefit Pension Obligation DeferredIncomeTaxExpenseBenefitPensionObligation	688000000	USD
CY2018	us-gaap	Number Of Operating Segments NumberOfOperatingSegments	2	segment
CY2018	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	44438000000	USD
CY2018	us-gaap	Operating Income Loss OperatingIncomeLoss	5264000000	USD
CY2018	us-gaap	Interest Income Expense Net InterestIncomeExpenseNet	-311000000	USD
CY2018	us-gaap	Depreciation Depletion And Amortization DepreciationDepletionAndAmortization	2329000000	USD
CY2018Q4	us-gaap	Assets Assets	60266000000	USD
CY2018	us-gaap	Payments To Acquire Productive Assets PaymentsToAcquireProductiveAssets	5168000000	USD
CY2017	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	41138000000	USD
CY2017	us-gaap	Operating Income Loss OperatingIncomeLoss	5966000000	USD
CY2017	us-gaap	Interest Income Expense Net InterestIncomeExpenseNet	-396000000	USD
CY2017	us-gaap	Depreciation Depletion And Amortization DepreciationDepletionAndAmortization	2222000000	USD
CY2017Q4	us-gaap	Assets Assets	53671000000	USD
CY2017	us-gaap	Payments To Acquire Productive Assets PaymentsToAcquireProductiveAssets	3891000000	USD
CY2016	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	39450000000	USD
CY2016	us-gaap	Operating Income Loss OperatingIncomeLoss	6996000000	USD
CY2016	us-gaap	Interest Income Expense Net InterestIncomeExpenseNet	-388000000	USD
CY2016	us-gaap	Depreciation Depletion And Amortization DepreciationDepletionAndAmortization	1886000000	USD
CY2016Q4	us-gaap	Assets Assets	51850000000	USD
CY2016	us-gaap	Payments To Acquire Productive Assets PaymentsToAcquireProductiveAssets	3391000000	USD
CY2017Q4	us-gaap	Restructuring Reserve RestructuringReserve	237000000	USD
CY2016Q4	us-gaap	Restructuring Reserve RestructuringReserve	333000000	USD
CY2015Q4	us-gaap	Restructuring Reserve RestructuringReserve	467000000	USD
CY2018	us-gaap	Restructuring Reserve Accrual Adjustment1 RestructuringReserveAccrualAdjustment1	-195000000	USD
CY2017	us-gaap	Restructuring Reserve Accrual Adjustment1 RestructuringReserveAccrualAdjustment1	0	USD
CY2016	us-gaap	Restructuring Reserve Accrual Adjustment1 RestructuringReserveAccrualAdjustment1	0	USD
CY2018	us-gaap	Payments For Restructuring PaymentsForRestructuring	5000000	USD
CY2017	us-gaap	Payments For Restructuring PaymentsForRestructuring	103000000	USD
CY2016	us-gaap	Payments For Restructuring PaymentsForRestructuring	144000000	USD
CY2018	us-gaap	Restructuring Charges RestructuringCharges	1000000	USD
CY2017	us-gaap	Restructuring Charges RestructuringCharges	7000000	USD
CY2016	us-gaap	Restructuring Charges RestructuringCharges	10000000	USD
CY2018Q4	us-gaap	Restructuring Reserve RestructuringReserve	38000000	USD
CY2017Q4	us-gaap	Restructuring Reserve RestructuringReserve	237000000	USD
CY2016Q4	us-gaap	Restructuring Reserve RestructuringReserve	333000000	USD
CY2018	us-gaap	Net Income Loss NetIncomeLoss	3935000000	USD
CY2017	us-gaap	Net Income Loss NetIncomeLoss	3205000000	USD
CY2016	us-gaap	Net Income Loss NetIncomeLoss	4195000000	USD
CY2018	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	691000000	shares
CY2017	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	720000000	shares
CY2016	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	751000000	shares
CY2018	us-gaap	Incremental Common Shares Attributable To Share Based Payment Arrangements IncrementalCommonSharesAttributableToShareBasedPaymentArrangements	3000000	shares
CY2017	us-gaap	Incremental Common Shares Attributable To Share Based Payment Arrangements IncrementalCommonSharesAttributableToShareBasedPaymentArrangements	3000000	shares
CY2016	us-gaap	Incremental Common Shares Attributable To Share Based Payment Arrangements IncrementalCommonSharesAttributableToShareBasedPaymentArrangements	4000000	shares
CY2018	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	694000000	shares
CY2017	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	723000000	shares
CY2016	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	755000000	shares
CY2018	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	5.69
CY2017	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	4.45
CY2016	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	5.59
CY2018	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	5.67
CY2017	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	4.43
CY2016	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	5.55
CY2018Q1	us-gaap	Revenues Revenues	9968000000	USD
CY2018Q2	us-gaap	Revenues Revenues	11775000000	USD
CY2018Q3	us-gaap	Revenues Revenues	11953000000	USD
CY2018Q4	us-gaap	Revenues Revenues	10742000000	USD
CY2018Q1	us-gaap	Operating Income Loss OperatingIncomeLoss	844000000	USD
CY2018Q2	us-gaap	Operating Income Loss OperatingIncomeLoss	1684000000	USD
CY2018Q3	us-gaap	Operating Income Loss OperatingIncomeLoss	1645000000	USD
CY2018Q4	us-gaap	Operating Income Loss OperatingIncomeLoss	1090000000	USD
CY2018Q1	us-gaap	Net Income Loss NetIncomeLoss	557000000	USD
CY2018Q2	us-gaap	Net Income Loss NetIncomeLoss	1036000000	USD
CY2018Q3	us-gaap	Net Income Loss NetIncomeLoss	1322000000	USD
CY2018Q4	us-gaap	Net Income Loss NetIncomeLoss	1019000000	USD
CY2018Q1	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.79
CY2018Q2	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	1.49
CY2018Q3	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	1.93
CY2018Q4	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	1.50
CY2018Q1	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.79
CY2018Q2	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	1.49
CY2018Q3	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	1.92
CY2018Q4	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	1.49
CY2017Q1	us-gaap	Revenues Revenues	9101000000	USD
CY2017Q2	us-gaap	Revenues Revenues	10747000000	USD
CY2017Q3	us-gaap	Revenues Revenues	11061000000	USD
CY2017Q4	us-gaap	Revenues Revenues	10229000000	USD
CY2017Q1	us-gaap	Operating Income Loss OperatingIncomeLoss	999000000	USD
CY2017Q2	us-gaap	Operating Income Loss OperatingIncomeLoss	1982000000	USD
CY2017Q3	us-gaap	Operating Income Loss OperatingIncomeLoss	1823000000	USD
CY2017Q4	us-gaap	Operating Income Loss OperatingIncomeLoss	1162000000	USD
CY2017Q1	us-gaap	Net Income Loss NetIncomeLoss	561000000	USD
CY2017Q2	us-gaap	Net Income Loss NetIncomeLoss	1186000000	USD
CY2017Q3	us-gaap	Net Income Loss NetIncomeLoss	1159000000	USD
CY2017Q4	us-gaap	Net Income Loss NetIncomeLoss	299000000	USD
CY2017Q1	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.77
CY2017Q2	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	1.63
CY2017Q3	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	1.62
CY2017Q4	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.42
CY2017Q1	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.77
CY2017Q2	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	1.62
CY2017Q3	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	1.61
CY2017Q4	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.42

Files In Submission

Name	View Source	Status
0000027904-19-000003-index-headers.html	Edgar Link	pending
0000027904-19-000003-index.html	Edgar Link	pending
0000027904-19-000003.txt	Edgar Link	pending
0000027904-19-000003-xbrl.zip	Edgar Link	pending
chart-676b378b5e31571a87c.jpg	Edgar Link	pending
dal-20181231.xsd	Edgar Link	pending
dal-20181231_cal.xml	Edgar Link	unprocessable
dal-20181231_def.xml	Edgar Link	unprocessable
dal-20181231_lab.xml	Edgar Link	unprocessable
dal-20181231_pre.xml	Edgar Link	unprocessable
dal1231201810k.htm	Edgar Link	pending
dal1231201810k_htm.xml	Edgar Link	completed
dal12312018ex1016.htm	Edgar Link	pending
dal12312018ex1018.htm	Edgar Link	pending
dal12312018ex107d.htm	Edgar Link	pending
dal12312018ex107e.htm	Edgar Link	pending
dal12312018ex211.htm	Edgar Link	pending
dal12312018ex231.htm	Edgar Link	pending
dal12312018ex311.htm	Edgar Link	pending
dal12312018ex312.htm	Edgar Link	pending
dal12312018ex32.htm	Edgar Link	pending
deltacra01a01a01a02a58.jpg	Edgar Link	pending
FilingSummary.xml	Edgar Link	unprocessable
Financial_Report.xlsx	Edgar Link	pending
MetaLinks.json	Edgar Link	pending
R1.htm	Edgar Link	pending
R10.htm	Edgar Link	pending
R11.htm	Edgar Link	pending
R12.htm	Edgar Link	pending
R13.htm	Edgar Link	pending
R14.htm	Edgar Link	pending
R15.htm	Edgar Link	pending
R16.htm	Edgar Link	pending
R17.htm	Edgar Link	pending
R18.htm	Edgar Link	pending
R19.htm	Edgar Link	pending
R2.htm	Edgar Link	pending
R20.htm	Edgar Link	pending
R21.htm	Edgar Link	pending
R22.htm	Edgar Link	pending
R23.htm	Edgar Link	pending
R24.htm	Edgar Link	pending
R25.htm	Edgar Link	pending
R26.htm	Edgar Link	pending
R27.htm	Edgar Link	pending
R28.htm	Edgar Link	pending
R29.htm	Edgar Link	pending
R3.htm	Edgar Link	pending
R30.htm	Edgar Link	pending
R31.htm	Edgar Link	pending
R32.htm	Edgar Link	pending
R33.htm	Edgar Link	pending
R34.htm	Edgar Link	pending
R35.htm	Edgar Link	pending
R36.htm	Edgar Link	pending
R37.htm	Edgar Link	pending
R38.htm	Edgar Link	pending
R39.htm	Edgar Link	pending
R4.htm	Edgar Link	pending
R40.htm	Edgar Link	pending
R41.htm	Edgar Link	pending
R42.htm	Edgar Link	pending
R43.htm	Edgar Link	pending
R44.htm	Edgar Link	pending
R45.htm	Edgar Link	pending
R46.htm	Edgar Link	pending
R47.htm	Edgar Link	pending
R48.htm	Edgar Link	pending
R49.htm	Edgar Link	pending
R5.htm	Edgar Link	pending
R50.htm	Edgar Link	pending
R51.htm	Edgar Link	pending
R52.htm	Edgar Link	pending
R53.htm	Edgar Link	pending
R54.htm	Edgar Link	pending
R55.htm	Edgar Link	pending
R56.htm	Edgar Link	pending
R57.htm	Edgar Link	pending
R58.htm	Edgar Link	pending
R59.htm	Edgar Link	pending
R6.htm	Edgar Link	pending
R60.htm	Edgar Link	pending
R61.htm	Edgar Link	pending
R62.htm	Edgar Link	pending
R63.htm	Edgar Link	pending
R64.htm	Edgar Link	pending
R65.htm	Edgar Link	pending
R66.htm	Edgar Link	pending
R67.htm	Edgar Link	pending
R68.htm	Edgar Link	pending
R69.htm	Edgar Link	pending
R7.htm	Edgar Link	pending
R70.htm	Edgar Link	pending
R71.htm	Edgar Link	pending
R72.htm	Edgar Link	pending
R73.htm	Edgar Link	pending
R74.htm	Edgar Link	pending
R75.htm	Edgar Link	pending
R76.htm	Edgar Link	pending
R77.htm	Edgar Link	pending
R78.htm	Edgar Link	pending
R79.htm	Edgar Link	pending
R8.htm	Edgar Link	pending
R80.htm	Edgar Link	pending
R81.htm	Edgar Link	pending
R82.htm	Edgar Link	pending
R83.htm	Edgar Link	pending
R84.htm	Edgar Link	pending
R85.htm	Edgar Link	pending
R86.htm	Edgar Link	pending
R87.htm	Edgar Link	pending
R88.htm	Edgar Link	pending
R89.htm	Edgar Link	pending
R9.htm	Edgar Link	pending
R90.htm	Edgar Link	pending
R91.htm	Edgar Link	pending
R92.htm	Edgar Link	pending
R93.htm	Edgar Link	pending
R94.htm	Edgar Link	pending
R95.htm	Edgar Link	pending
R96.htm	Edgar Link	pending
R97.htm	Edgar Link	pending
R98.htm	Edgar Link	pending
R99.htm	Edgar Link	pending
report.css	Edgar Link	pending
Show.js	Edgar Link	pending

Create your account

Find Stocks Worth Researching

Deeply Understand Businesses

Value Businesses Intelligently

$DAL
DELTA AIR LINES, INC. Stock $dal

2018 Q4 Form 10-K Financial Statement

#000002790419000003 Filed on February 15, 2019

Income Statement

Balance Sheet

Cashflow Statement

Facts In Submission

Files In Submission

$DAL DELTA AIR LINES, INC. Stock $dal

2018 Q4 Form 10-K Financial Statement

#000002790419000003 Filed on February 15, 2019

Income Statement

Balance Sheet

Cashflow Statement

Facts In Submission

Files In Submission

$DAL
DELTA AIR LINES, INC. Stock $dal