$DAL
DELTA AIR LINES, INC. Stock $dal

$dal Overview Financials Valuation SEC Filings Company Website

2017 Form 10-K Financial Statement

#000002790418000006 Filed on February 23, 2018

Income Statement

Concept	2017	2016 Q4	2016 Q3
Revenue	$41.24B	$9.458B	$10.48B
YoY Change	4.05%	-0.46%	-5.62%
Cost Of Revenue	$18.13B	$4.740B	$4.281B
YoY Change	11.67%	22.96%	-8.13%
Gross Profit	$23.01B	$4.529B	$6.202B
YoY Change	-0.89%	-19.8%	-3.8%
Gross Profit Margin	55.78%	47.89%	59.16%
Selling, General & Admin	$12.95B	$2.882B	$3.255B
YoY Change	5.63%	-3.77%	-1.42%
% of Gross Profit	56.29%	63.63%	52.48%
Research & Development
YoY Change
% of Gross Profit
Depreciation & Amortization	$2.222B	$1.886B	$474.0M
YoY Change	17.82%	318.18%	1.72%
% of Gross Profit	9.66%	41.64%	7.64%
Operating Expenses	$35.17B	$3.454B	$8.514B
YoY Change	8.37%	-10.03%	-4.27%
Operating Profit	$5.966B	$1.020B	$1.969B
YoY Change	-14.72%	-40.59%	-11.03%
Interest Expense	$396.0M	-$104.0M	$95.00M
YoY Change	2.06%	-46.11%	-21.49%
% of Operating Profit	6.64%	-10.2%	4.82%
Other Income/Expense, Net	-$466.0M	-$302.0M	-$69.00M
YoY Change	-27.53%	268.29%	-51.06%
Pretax Income	$5.500B	$669.0M	$1.900B
YoY Change	-13.43%	-56.36%	-8.3%
Income Tax	$2.295B	$225.0M	$641.0M
% Of Pretax Income	41.73%	33.63%	33.74%
Net Earnings	$3.205B	$622.0M	$1.259B
YoY Change	-23.6%	-36.53%	-4.26%
Net Earnings / Revenue	7.77%	6.58%	12.01%
Basic Earnings Per Share	$4.45	$0.85	$1.70
Diluted Earnings Per Share	$4.43	$0.84	$1.69
COMMON SHARES
Basic Shares Outstanding	720.0M shares		740.0M shares
Diluted Shares Outstanding	723.0M shares		744.0M shares

Balance Sheet

Concept	2017	2016 Q4	2016 Q3
SHORT-TERM ASSETS
Cash & Short-Term Investments	$2.639B	$3.249B	$3.152B
YoY Change	-18.78%	-5.47%	-17.29%
Cash & Equivalents	$1.814B	$2.762B	$1.638B
Short-Term Investments	$825.0M	$487.0M	$1.514B
Other Short-Term Assets	$1.459B	$1.247B	$1.406B
YoY Change	17.0%	-55.19%	-72.5%
Inventory	$1.329B	$891.0M	$775.0M
Prepaid Expenses
Receivables	$2.377B	$2.064B	$1.996B
Other Receivables	$0.00	$0.00	$0.00
Total Short-Term Assets	$7.804B	$7.451B	$7.329B
YoY Change	4.74%	-17.72%	-38.79%
LONG-TERM ASSETS
Property, Plant & Equipment	$26.56B	$24.38B	$24.11B
YoY Change	8.98%	5.8%	6.62%
Goodwill		$9.794B	$9.794B
YoY Change		0.0%	0.0%
Intangibles		$4.844B	$4.848B
YoY Change		-0.35%	5.64%
Long-Term Investments
YoY Change
Other Assets	$4.663B	$1.733B	$1.722B
YoY Change	-2.79%	21.36%	-6.82%
Total Long-Term Assets	$45.87B	$44.40B	$43.62B
YoY Change	4.7%	0.73%	4.92%
TOTAL ASSETS
Total Short-Term Assets	$7.804B	$7.451B	$7.329B
Total Long-Term Assets	$45.87B	$44.40B	$43.62B
Total Assets	$53.67B	$51.85B	$50.95B
YoY Change	4.7%	-2.42%	-4.85%
SHORT-TERM LIABILITIES
YoY Change
Accounts Payable	$3.634B	$2.572B	$2.567B
YoY Change	41.29%	-6.23%	-4.5%
Accrued Expenses	$4.183B	$5.262B	$4.718B
YoY Change	-20.51%	16.91%	13.17%
Deferred Revenue
YoY Change
Short-Term Debt	$0.00	$0.00	$0.00
YoY Change
Long-Term Debt Due	$2.242B	$1.009B	$1.092B
YoY Change	98.23%	-28.69%	-35.95%
Total Short-Term Liabilities	$18.96B	$15.24B	$15.15B
YoY Change	24.41%	-13.05%	-13.98%
LONG-TERM LIABILITIES
Long-Term Debt	$6.592B	$5.999B	$6.473B
YoY Change	6.31%	-8.15%	-8.78%
Other Long-Term Liabilities	$15.59B	$1.878B	$1.956B
YoY Change	-11.09%	-0.69%	-20.65%
Total Long-Term Liabilities	$22.18B	$23.74B	$23.29B
YoY Change	-6.54%	-4.13%	-9.35%
TOTAL LIABILITIES
Total Short-Term Liabilities	$18.96B	$15.24B	$15.15B
Total Long-Term Liabilities	$22.18B	$23.74B	$23.29B
Total Liabilities	$41.14B	$38.97B	$38.44B
YoY Change	5.56%	-7.83%	-11.23%
SHAREHOLDERS EQUITY
Retained Earnings		$7.903B	$11.11B
YoY Change		42.09%	64.63%
Common Stock		$12.29B	$8.887B
YoY Change		-4.96%	-21.25%
Preferred Stock
YoY Change
Treasury Stock (at cost)		$274.0M	$274.0M
YoY Change		-26.54%	-26.34%
Treasury Stock Shares		14.15M shares	14.13M shares
Shareholders Equity	$12.53B	$11.28B	$12.51B
YoY Change
Total Liabilities & Shareholders Equity	$53.67B	$51.26B	$50.95B
YoY Change	4.7%	-3.53%	-5.03%

Cashflow Statement

Concept	2017	2016 Q4	2016 Q3
OPERATING ACTIVITIES
Net Income	$3.205B	$622.0M	$1.259B
YoY Change	-23.6%	-36.53%	-4.26%
Depreciation, Depletion And Amortization	$2.222B	$1.886B	$474.0M
YoY Change	17.82%	318.18%	1.72%
Cash From Operating Activities	$5.023B	$1.135B	$1.854B
YoY Change	-30.38%	-23.26%	-10.3%
INVESTING ACTIVITIES
Capital Expenditures	-$3.891B	-$794.0M	-$680.0M
YoY Change	14.74%	-9.57%	21.0%
Acquisitions
YoY Change
Other Investing Activities	-$211.0M	$1.239B	-$207.0M
YoY Change	-17.9%	-511.63%	-53.69%
Cash From Investing Activities	-$5.266B	$445.0M	-$887.0M
YoY Change	144.36%	-137.74%	-12.09%
FINANCING ACTIVITIES
Cash Dividend Paid	$731.0M
YoY Change	43.61%
Common Stock Issuance & Retirement, Net	$1.677B
YoY Change	-35.52%
Debt Paid & Issued, Net
YoY Change
Cash From Financing Activities	-$730.0M	-446.0M	-991.0M
YoY Change	-82.86%	-36.01%	0.92%
NET CHANGE
Cash From Operating Activities	$5.023B	1.135B	1.854B
Cash From Investing Activities	-$5.266B	445.0M	-887.0M
Cash From Financing Activities	-$730.0M	-446.0M	-991.0M
Net Change In Cash	-$973.0M	1.134B	-24.00M
YoY Change	-221.63%	-385.64%	-131.58%
FREE CASH FLOW
Cash From Operating Activities	$5.023B	$1.135B	$1.854B
Capital Expenditures	-$3.891B	-$794.0M	-$680.0M
Free Cash Flow	$8.914B	$1.929B	$2.534B
YoY Change	-15.95%	-18.16%	-3.61%

Facts In Submission

Frame	Concept Type	Concept / XBRL Key	Value	Unit
CY2017Q4	dal	Percent Of Amount Above Threshold For Profit Sharing Payout PercentOfAmountAboveThresholdForProfitSharingPayout	0.2
CY2017Q4	dal	Percent Of Threshold Amount For Profit Sharing Payout PercentOfThresholdAmountForProfitSharingPayout	0.1
CY2017Q4	dal	Profit Sharing Threshold ProfitSharingThreshold	2500000000.0	USD
CY2015	dal	Weighted Average Price Per Treasury Share Withheld For Taxes WeightedAveragePricePerTreasuryShareWithheldForTaxes	46.83
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
CY2017	dei	Amendment Flag AmendmentFlag	false
CY2017	dei	Entity Central Index Key EntityCentralIndexKey	0000027904
CY2017	dei	Current Fiscal Year End Date CurrentFiscalYearEndDate	--12-31
CY2017	dei	Entity Current Reporting Status EntityCurrentReportingStatus	Yes
CY2017	dei	Entity Filer Category EntityFilerCategory	Large Accelerated Filer
CY2017	dei	Document Fiscal Period Focus DocumentFiscalPeriodFocus	FY
CY2017	dei	Document Fiscal Year Focus DocumentFiscalYearFocus	2017
CY2017	dei	Entity Registrant Name EntityRegistrantName	DELTA AIR LINES INC /DE/
CY2017	dei	Entity Voluntary Filers EntityVoluntaryFilers	No
CY2017	dei	Entity Well Known Seasoned Issuer EntityWellKnownSeasonedIssuer	Yes
CY2016Q4	us-gaap	Airline Related Inventory Valuation Reserves AirlineRelatedInventoryValuationReserves	110000000	USD
CY2017Q4	us-gaap	Airline Related Inventory Valuation Reserves AirlineRelatedInventoryValuationReserves	113000000	USD
CY2016Q4	us-gaap	Allowance For Doubtful Accounts Receivable Current AllowanceForDoubtfulAccountsReceivableCurrent	15000000	USD
CY2017Q4	us-gaap	Allowance For Doubtful Accounts Receivable Current AllowanceForDoubtfulAccountsReceivableCurrent	12000000	USD
CY2014Q4	us-gaap	Aoci Tax Attributable To Parent AociTaxAttributableToParent	-1279000000	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
CY2016Q4	us-gaap	Common Stock Par Or Stated Value Per Share CommonStockParOrStatedValuePerShare	0.0001
CY2016Q4	us-gaap	Common Stock Shares Authorized CommonStockSharesAuthorized	1500000000	shares
CY2016Q4	us-gaap	Common Stock Shares Issued CommonStockSharesIssued	744886938	shares
CY2017Q4	us-gaap	Common Stock Shares Issued CommonStockSharesIssued	714674160	shares
CY2017Q4	us-gaap	Finite Lived Intangible Assets Amortization Expense Year Five FiniteLivedIntangibleAssetsAmortizationExpenseYearFive	16000000	USD
CY2017Q4	us-gaap	Finite Lived Intangible Assets Amortization Expense Year Four FiniteLivedIntangibleAssetsAmortizationExpenseYearFour	16000000	USD
CY2017Q4	us-gaap	Finite Lived Intangible Assets Amortization Expense Year Three FiniteLivedIntangibleAssetsAmortizationExpenseYearThree	16000000	USD
CY2017Q4	us-gaap	Finite Lived Intangible Assets Amortization Expense Year Two FiniteLivedIntangibleAssetsAmortizationExpenseYearTwo	16000000	USD
CY2016	us-gaap	Lease And Rental Expense LeaseAndRentalExpense	1300000000	USD
CY2017	us-gaap	Operating Loss Carryforwards Expiration Date OperatingLossCarryforwardsExpirationDate	2027-01-01
CY2015	us-gaap	Other Comprehensive Income Loss Tax OtherComprehensiveIncomeLossTax	41000000	USD
CY2016	us-gaap	Other Comprehensive Income Loss Tax OtherComprehensiveIncomeLossTax	-293000000	USD
CY2017	us-gaap	Other Comprehensive Income Loss Tax OtherComprehensiveIncomeLossTax	-32000000	USD
CY2015	us-gaap	Reclassification From Aoci Current Period Tax ReclassificationFromAociCurrentPeriodTax	-16000000	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
CY2016Q4	us-gaap	Treasury Stock Shares TreasuryStockShares	14149229	shares
CY2017Q4	us-gaap	Treasury Stock Shares TreasuryStockShares	7476181	shares
CY2017	dei	Document Type DocumentType	10-K
CY2017	dei	Document Period End Date DocumentPeriodEndDate	2017-12-31
CY2017Q2	dei	Entity Public Float EntityPublicFloat	38900000000	USD
CY2018Q1	dei	Entity Common Stock Shares Outstanding EntityCommonStockSharesOutstanding	706913358	shares
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
CY2017Q4	us-gaap	Short Term Investments ShortTermInvestments	825000000	USD
CY2016Q4	us-gaap	Short Term Investments ShortTermInvestments	487000000	USD
CY2017Q4	us-gaap	Receivables Net Current ReceivablesNetCurrent	2377000000	USD
CY2016Q4	us-gaap	Receivables Net Current ReceivablesNetCurrent	2064000000	USD
CY2017Q4	us-gaap	Inventory Finished Goods InventoryFinishedGoods	916000000	USD
CY2016Q4	us-gaap	Inventory Finished Goods InventoryFinishedGoods	519000000	USD
CY2017Q4	us-gaap	Airline Related Inventory Net AirlineRelatedInventoryNet	413000000	USD
CY2016Q4	us-gaap	Airline Related Inventory Net AirlineRelatedInventoryNet	372000000	USD
CY2017Q4	us-gaap	Prepaid Expense And Other Assets Current PrepaidExpenseAndOtherAssetsCurrent	1499000000	USD
CY2016Q4	us-gaap	Prepaid Expense And Other Assets Current PrepaidExpenseAndOtherAssetsCurrent	1247000000	USD
CY2017Q4	us-gaap	Assets Current AssetsCurrent	7844000000	USD
CY2016Q4	us-gaap	Assets Current AssetsCurrent	7451000000	USD
CY2017Q4	us-gaap	Property Plant And Equipment Net PropertyPlantAndEquipmentNet	26563000000	USD
CY2016Q4	us-gaap	Property Plant And Equipment Net PropertyPlantAndEquipmentNet	24375000000	USD
CY2017Q4	us-gaap	Goodwill Goodwill	9794000000	USD
CY2016Q4	us-gaap	Goodwill Goodwill	9794000000	USD
CY2017Q4	us-gaap	Intangible Assets Net Excluding Goodwill IntangibleAssetsNetExcludingGoodwill	4847000000	USD
CY2016Q4	us-gaap	Intangible Assets Net Excluding Goodwill IntangibleAssetsNetExcludingGoodwill	4844000000	USD
CY2017Q4	us-gaap	Deferred Income Tax Assets Net DeferredIncomeTaxAssetsNet	935000000	USD
CY2016Q4	us-gaap	Deferred Income Tax Assets Net DeferredIncomeTaxAssetsNet	3064000000	USD
CY2017Q4	us-gaap	Other Assets Noncurrent OtherAssetsNoncurrent	3309000000	USD
CY2016Q4	us-gaap	Other Assets Noncurrent OtherAssetsNoncurrent	1733000000	USD
CY2017Q4	us-gaap	Other Assets OtherAssets	18885000000	USD
CY2016Q4	us-gaap	Other Assets OtherAssets	19435000000	USD
CY2017Q4	us-gaap	Assets Assets	53292000000	USD
CY2016Q4	us-gaap	Assets Assets	51261000000	USD
CY2017Q4	us-gaap	Long Term Debt And Capital Lease Obligations Current LongTermDebtAndCapitalLeaseObligationsCurrent	2242000000	USD
CY2016Q4	us-gaap	Long Term Debt And Capital Lease Obligations Current LongTermDebtAndCapitalLeaseObligationsCurrent	1131000000	USD
CY2017Q4	us-gaap	Air Traffic Liability Current AirTrafficLiabilityCurrent	4888000000	USD
CY2016Q4	us-gaap	Air Traffic Liability Current AirTrafficLiabilityCurrent	4626000000	USD
CY2017Q4	us-gaap	Accounts Payable Current AccountsPayableCurrent	3674000000	USD
CY2016Q4	us-gaap	Accounts Payable Current AccountsPayableCurrent	2572000000	USD
CY2017Q4	us-gaap	Employee Related Liabilities Current EmployeeRelatedLiabilitiesCurrent	3022000000	USD
CY2016Q4	us-gaap	Employee Related Liabilities Current EmployeeRelatedLiabilitiesCurrent	2924000000	USD
CY2017Q4	us-gaap	Frequent Flier Liability Current FrequentFlierLiabilityCurrent	1822000000	USD
CY2016Q4	us-gaap	Frequent Flier Liability Current FrequentFlierLiabilityCurrent	1648000000	USD
CY2017Q4	us-gaap	Short Term Non Bank Loans And Notes Payable ShortTermNonBankLoansAndNotesPayable	1067000000	USD
CY2016Q4	us-gaap	Short Term Non Bank Loans And Notes Payable ShortTermNonBankLoansAndNotesPayable	431000000	USD
CY2017Q4	us-gaap	Other Accrued Liabilities Current OtherAccruedLiabilitiesCurrent	1858000000	USD
CY2016Q4	us-gaap	Other Accrued Liabilities Current OtherAccruedLiabilitiesCurrent	1907000000	USD
CY2017Q4	us-gaap	Liabilities Current LiabilitiesCurrent	18573000000	USD
CY2016Q4	us-gaap	Liabilities Current LiabilitiesCurrent	15239000000	USD
CY2017Q4	us-gaap	Long Term Debt And Capital Lease Obligations LongTermDebtAndCapitalLeaseObligations	6592000000	USD
CY2016Q4	us-gaap	Long Term Debt And Capital Lease Obligations LongTermDebtAndCapitalLeaseObligations	6201000000	USD
CY2017Q4	us-gaap	Pension And Other Postretirement Defined Benefit Plans Liabilities Noncurrent PensionAndOtherPostretirementDefinedBenefitPlansLiabilitiesNoncurrent	9810000000	USD
CY2016Q4	us-gaap	Pension And Other Postretirement Defined Benefit Plans Liabilities Noncurrent PensionAndOtherPostretirementDefinedBenefitPlansLiabilitiesNoncurrent	13378000000	USD
CY2017Q4	us-gaap	Frequent Flier Liability Noncurrent FrequentFlierLiabilityNoncurrent	2296000000	USD
CY2016Q4	us-gaap	Frequent Flier Liability Noncurrent FrequentFlierLiabilityNoncurrent	2278000000	USD
CY2017Q4	us-gaap	Other Liabilities Noncurrent OtherLiabilitiesNoncurrent	2111000000	USD
CY2016Q4	us-gaap	Other Liabilities Noncurrent OtherLiabilitiesNoncurrent	1878000000	USD
CY2017Q4	us-gaap	Liabilities Noncurrent LiabilitiesNoncurrent	20809000000	USD
CY2016Q4	us-gaap	Liabilities Noncurrent LiabilitiesNoncurrent	23735000000	USD
CY2017Q4	us-gaap	Commitments And Contingencies CommitmentsAndContingencies		USD
CY2016Q4	us-gaap	Commitments And Contingencies CommitmentsAndContingencies		USD
CY2017Q4	us-gaap	Common Stock Value CommonStockValue	0	USD
CY2016Q4	us-gaap	Common Stock Value CommonStockValue	0	USD
CY2017Q4	us-gaap	Additional Paid In Capital Common Stock AdditionalPaidInCapitalCommonStock	12053000000	USD
CY2016Q4	us-gaap	Additional Paid In Capital Common Stock AdditionalPaidInCapitalCommonStock	12294000000	USD
CY2017Q4	us-gaap	Retained Earnings Accumulated Deficit RetainedEarningsAccumulatedDeficit	9636000000	USD
CY2016Q4	us-gaap	Retained Earnings Accumulated Deficit RetainedEarningsAccumulatedDeficit	7903000000	USD
CY2017Q4	us-gaap	Accumulated Other Comprehensive Income Loss Net Of Tax AccumulatedOtherComprehensiveIncomeLossNetOfTax	-7621000000	USD
CY2016Q4	us-gaap	Accumulated Other Comprehensive Income Loss Net Of Tax AccumulatedOtherComprehensiveIncomeLossNetOfTax	-7636000000	USD
CY2017Q4	us-gaap	Treasury Stock Value TreasuryStockValue	158000000	USD
CY2016Q4	us-gaap	Treasury Stock Value TreasuryStockValue	274000000	USD
CY2017Q4	us-gaap	Stockholders Equity StockholdersEquity	13910000000	USD
CY2016Q4	us-gaap	Stockholders Equity StockholdersEquity	12287000000	USD
CY2017Q4	us-gaap	Liabilities And Stockholders Equity LiabilitiesAndStockholdersEquity	53292000000	USD
CY2016Q4	us-gaap	Liabilities And Stockholders Equity LiabilitiesAndStockholdersEquity	51261000000	USD
CY2017	us-gaap	Passenger Revenue Mainline PassengerRevenueMainline	29105000000	USD
CY2016	us-gaap	Passenger Revenue Mainline PassengerRevenueMainline	28105000000	USD
CY2015	us-gaap	Passenger Revenue Mainline PassengerRevenueMainline	28898000000	USD
CY2017	us-gaap	Passenger Revenue Regional PassengerRevenueRegional	5714000000	USD
CY2016	us-gaap	Passenger Revenue Regional PassengerRevenueRegional	5672000000	USD
CY2015	us-gaap	Passenger Revenue Regional PassengerRevenueRegional	5884000000	USD
CY2017	us-gaap	Passenger Revenue PassengerRevenue	34819000000	USD
CY2016	us-gaap	Passenger Revenue PassengerRevenue	33777000000	USD
CY2015	us-gaap	Passenger Revenue PassengerRevenue	34782000000	USD
CY2017	us-gaap	Cargo And Freight Revenue CargoAndFreightRevenue	729000000	USD
CY2016	us-gaap	Cargo And Freight Revenue CargoAndFreightRevenue	668000000	USD
CY2015	us-gaap	Cargo And Freight Revenue CargoAndFreightRevenue	813000000	USD
CY2017	us-gaap	Other Sales Revenue Net OtherSalesRevenueNet	5696000000	USD
CY2016	us-gaap	Other Sales Revenue Net OtherSalesRevenueNet	5194000000	USD
CY2015	us-gaap	Other Sales Revenue Net OtherSalesRevenueNet	5109000000	USD
CY2017	us-gaap	Revenues Revenues	41244000000	USD
CY2016	us-gaap	Revenues Revenues	39639000000	USD
CY2015	us-gaap	Revenues Revenues	40704000000	USD
CY2017	us-gaap	Labor And Related Expense LaborAndRelatedExpense	10436000000	USD
CY2016	us-gaap	Labor And Related Expense LaborAndRelatedExpense	10034000000	USD
CY2015	us-gaap	Labor And Related Expense LaborAndRelatedExpense	8776000000	USD
CY2017	us-gaap	Fuel Costs FuelCosts	5733000000	USD
CY2016	us-gaap	Fuel Costs FuelCosts	5133000000	USD
CY2015	us-gaap	Fuel Costs FuelCosts	6544000000	USD
CY2017	us-gaap	Airline Capacity Purchase Arrangements AirlineCapacityPurchaseArrangements	4503000000	USD
CY2016	us-gaap	Airline Capacity Purchase Arrangements AirlineCapacityPurchaseArrangements	4311000000	USD
CY2015	us-gaap	Airline Capacity Purchase Arrangements AirlineCapacityPurchaseArrangements	4241000000	USD
CY2017	us-gaap	Depreciation Depletion And Amortization DepreciationDepletionAndAmortization	2235000000	USD
CY2016	us-gaap	Depreciation Depletion And Amortization DepreciationDepletionAndAmortization	1902000000	USD
CY2015	us-gaap	Depreciation Depletion And Amortization DepreciationDepletionAndAmortization	1835000000	USD
CY2017	us-gaap	Professional And Contract Services Expense ProfessionalAndContractServicesExpense	2184000000	USD
CY2016	us-gaap	Professional And Contract Services Expense ProfessionalAndContractServicesExpense	1991000000	USD
CY2015	us-gaap	Professional And Contract Services Expense ProfessionalAndContractServicesExpense	1848000000	USD
CY2017	us-gaap	Aircraft Maintenance Materials And Repairs AircraftMaintenanceMaterialsAndRepairs	1992000000	USD
CY2016	us-gaap	Aircraft Maintenance Materials And Repairs AircraftMaintenanceMaterialsAndRepairs	1823000000	USD
CY2015	us-gaap	Aircraft Maintenance Materials And Repairs AircraftMaintenanceMaterialsAndRepairs	1848000000	USD
CY2017	us-gaap	Selling And Marketing Expense SellingAndMarketingExpense	1787000000	USD
CY2016	us-gaap	Selling And Marketing Expense SellingAndMarketingExpense	1710000000	USD
CY2015	us-gaap	Selling And Marketing Expense SellingAndMarketingExpense	1672000000	USD
CY2017	us-gaap	Landing Fees And Other Rentals LandingFeesAndOtherRentals	1528000000	USD
CY2016	us-gaap	Landing Fees And Other Rentals LandingFeesAndOtherRentals	1490000000	USD
CY2015	us-gaap	Landing Fees And Other Rentals LandingFeesAndOtherRentals	1493000000	USD
CY2017	us-gaap	Cost Of Services Catering CostOfServicesCatering	1067000000	USD
CY2016	us-gaap	Cost Of Services Catering CostOfServicesCatering	907000000	USD
CY2015	us-gaap	Cost Of Services Catering CostOfServicesCatering	872000000	USD
CY2017	us-gaap	Other Labor Related Expenses OtherLaborRelatedExpenses	1065000000	USD
CY2016	us-gaap	Other Labor Related Expenses OtherLaborRelatedExpenses	1115000000	USD
CY2015	us-gaap	Other Labor Related Expenses OtherLaborRelatedExpenses	1490000000	USD
CY2017	us-gaap	Aircraft Rental AircraftRental	351000000	USD
CY2016	us-gaap	Aircraft Rental AircraftRental	285000000	USD
CY2015	us-gaap	Aircraft Rental AircraftRental	250000000	USD
CY2017	us-gaap	Other Cost And Expense Operating OtherCostAndExpenseOperating	2249000000	USD
CY2016	us-gaap	Other Cost And Expense Operating OtherCostAndExpenseOperating	1986000000	USD
CY2015	us-gaap	Other Cost And Expense Operating OtherCostAndExpenseOperating	2033000000	USD
CY2017	us-gaap	Operating Expenses OperatingExpenses	35130000000	USD
CY2016	us-gaap	Operating Expenses OperatingExpenses	32687000000	USD
CY2015	us-gaap	Operating Expenses OperatingExpenses	32902000000	USD
CY2017	us-gaap	Operating Income Loss OperatingIncomeLoss	6114000000	USD
CY2016	us-gaap	Operating Income Loss OperatingIncomeLoss	6952000000	USD
CY2015	us-gaap	Operating Income Loss OperatingIncomeLoss	7802000000	USD
CY2017	us-gaap	Interest Income Expense Net InterestIncomeExpenseNet	-396000000	USD
CY2016	us-gaap	Interest Income Expense Net InterestIncomeExpenseNet	-388000000	USD
CY2015	us-gaap	Interest Income Expense Net InterestIncomeExpenseNet	-481000000	USD
CY2017	us-gaap	Other Nonoperating Income Expense OtherNonoperatingIncomeExpense	-17000000	USD
CY2016	us-gaap	Other Nonoperating Income Expense OtherNonoperatingIncomeExpense	72000000	USD
CY2015	us-gaap	Other Nonoperating Income Expense OtherNonoperatingIncomeExpense	-164000000	USD
CY2017	us-gaap	Nonoperating Income Expense NonoperatingIncomeExpense	-413000000	USD
CY2016	us-gaap	Nonoperating Income Expense NonoperatingIncomeExpense	-316000000	USD
CY2015	us-gaap	Nonoperating Income Expense NonoperatingIncomeExpense	-645000000	USD
CY2017	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	5701000000	USD
CY2016	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	6636000000	USD
CY2015	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	7157000000	USD
CY2017	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	2124000000	USD
CY2016	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	2263000000	USD
CY2015	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	2631000000	USD
CY2017	us-gaap	Net Income Loss NetIncomeLoss	3577000000	USD
CY2016	us-gaap	Net Income Loss NetIncomeLoss	4373000000	USD
CY2015	us-gaap	Net Income Loss NetIncomeLoss	4526000000	USD
CY2017	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	4.97
CY2016	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	5.82
CY2015	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	5.68
CY2017	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	4.95
CY2016	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	5.79
CY2015	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	5.63
CY2017	us-gaap	Common Stock Dividends Per Share Declared CommonStockDividendsPerShareDeclared	1.02
CY2016	us-gaap	Common Stock Dividends Per Share Declared CommonStockDividendsPerShareDeclared	0.68
CY2015	us-gaap	Common Stock Dividends Per Share Declared CommonStockDividendsPerShareDeclared	0.45
CY2017	us-gaap	Net Income Loss NetIncomeLoss	3577000000	USD
CY2016	us-gaap	Net Income Loss NetIncomeLoss	4373000000	USD
CY2015	us-gaap	Net Income Loss NetIncomeLoss	4526000000	USD
CY2017	us-gaap	Other Comprehensive Income Loss Derivatives Qualifying As Hedges Net Of Tax OtherComprehensiveIncomeLossDerivativesQualifyingAsHedgesNetOfTax	-27000000	USD
CY2016	us-gaap	Other Comprehensive Income Loss Derivatives Qualifying As Hedges Net Of Tax OtherComprehensiveIncomeLossDerivativesQualifyingAsHedgesNetOfTax	-43000000	USD
CY2015	us-gaap	Other Comprehensive Income Loss Derivatives Qualifying As Hedges Net Of Tax OtherComprehensiveIncomeLossDerivativesQualifyingAsHedgesNetOfTax	-82000000	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
CY2015	us-gaap	Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Adjustment Net Of Tax OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentNetOfTax	-163000000	USD
CY2017	us-gaap	Other Comprehensive Income Loss Available For Sale Securities Adjustment Net Of Tax OtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentNetOfTax	140000000	USD
CY2016	us-gaap	Other Comprehensive Income Loss Available For Sale Securities Adjustment Net Of Tax OtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentNetOfTax	42000000	USD
CY2015	us-gaap	Other Comprehensive Income Loss Available For Sale Securities Adjustment Net Of Tax OtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentNetOfTax	-45000000	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
CY2015	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	36000000	USD
CY2017	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	3592000000	USD
CY2016	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	4012000000	USD
CY2015	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	4562000000	USD
CY2017	us-gaap	Net Income Loss NetIncomeLoss	3577000000	USD
CY2016	us-gaap	Net Income Loss NetIncomeLoss	4373000000	USD
CY2015	us-gaap	Net Income Loss NetIncomeLoss	4526000000	USD
CY2017	us-gaap	Depreciation And Amortization DepreciationAndAmortization	2235000000	USD
CY2016	us-gaap	Depreciation And Amortization DepreciationAndAmortization	1902000000	USD
CY2015	us-gaap	Depreciation And Amortization DepreciationAndAmortization	1835000000	USD
CY2017	us-gaap	Derivative Gain Loss On Derivative Net DerivativeGainLossOnDerivativeNet	7000000	USD
CY2016	us-gaap	Derivative Gain Loss On Derivative Net DerivativeGainLossOnDerivativeNet	342000000	USD
CY2015	us-gaap	Derivative Gain Loss On Derivative Net DerivativeGainLossOnDerivativeNet	1366000000	USD
CY2017	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	2071000000	USD
CY2016	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	2223000000	USD
CY2015	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	2581000000	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
CY2015	us-gaap	Pension And Other Postretirement Benefit Contributions PensionAndOtherPostretirementBenefitContributions	1013000000	USD
CY2017	us-gaap	Income Loss From Equity Method Investments IncomeLossFromEquityMethodInvestments	1000000	USD
CY2016	us-gaap	Income Loss From Equity Method Investments IncomeLossFromEquityMethodInvestments	160000000	USD
CY2015	us-gaap	Income Loss From Equity Method Investments IncomeLossFromEquityMethodInvestments	35000000	USD
CY2017	us-gaap	Increase Decrease In Receivables IncreaseDecreaseInReceivables	328000000	USD
CY2016	us-gaap	Increase Decrease In Receivables IncreaseDecreaseInReceivables	147000000	USD
CY2015	us-gaap	Increase Decrease In Receivables IncreaseDecreaseInReceivables	56000000	USD
CY2017	us-gaap	Increase Decrease In Inventories IncreaseDecreaseInInventories	397000000	USD
CY2016	us-gaap	Increase Decrease In Inventories IncreaseDecreaseInInventories	140000000	USD
CY2015	us-gaap	Increase Decrease In Inventories IncreaseDecreaseInInventories	-155000000	USD
CY2017	us-gaap	Increase Decrease In Margin Deposits Outstanding IncreaseDecreaseInMarginDepositsOutstanding	5000000	USD
CY2016	us-gaap	Increase Decrease In Margin Deposits Outstanding IncreaseDecreaseInMarginDepositsOutstanding	-81000000	USD
CY2015	us-gaap	Increase Decrease In Margin Deposits Outstanding IncreaseDecreaseInMarginDepositsOutstanding	-806000000	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
CY2015	us-gaap	Increase Decrease In Prepaid Deferred Expense And Other Assets IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets	102000000	USD
CY2017	us-gaap	Increase Decrease In Air Traffic Liability1 IncreaseDecreaseInAirTrafficLiability1	262000000	USD
CY2016	us-gaap	Increase Decrease In Air Traffic Liability1 IncreaseDecreaseInAirTrafficLiability1	123000000	USD
CY2015	us-gaap	Increase Decrease In Air Traffic Liability1 IncreaseDecreaseInAirTrafficLiability1	207000000	USD
CY2017	us-gaap	Increase Decrease In Frequent Flyer Liability IncreaseDecreaseInFrequentFlyerLiability	192000000	USD
CY2016	us-gaap	Increase Decrease In Frequent Flyer Liability IncreaseDecreaseInFrequentFlyerLiability	45000000	USD
CY2015	us-gaap	Increase Decrease In Frequent Flyer Liability IncreaseDecreaseInFrequentFlyerLiability	-301000000	USD
CY2017	dal	Increase Decrease In Profit Sharing IncreaseDecreaseInProfitSharing	-51000000	USD
CY2016	dal	Increase Decrease In Profit Sharing IncreaseDecreaseInProfitSharing	-383000000	USD
CY2015	dal	Increase Decrease In Profit Sharing IncreaseDecreaseInProfitSharing	734000000	USD
CY2017	us-gaap	Increase Decrease In Accounts Payable And Accrued Liabilities IncreaseDecreaseInAccountsPayableAndAccruedLiabilities	992000000	USD
CY2016	us-gaap	Increase Decrease In Accounts Payable And Accrued Liabilities IncreaseDecreaseInAccountsPayableAndAccruedLiabilities	285000000	USD
CY2015	us-gaap	Increase Decrease In Accounts Payable And Accrued Liabilities IncreaseDecreaseInAccountsPayableAndAccruedLiabilities	-201000000	USD
CY2017	us-gaap	Other Operating Activities Cash Flow Statement OtherOperatingActivitiesCashFlowStatement	-33000000	USD
CY2016	us-gaap	Other Operating Activities Cash Flow Statement OtherOperatingActivitiesCashFlowStatement	88000000	USD
CY2015	us-gaap	Other Operating Activities Cash Flow Statement OtherOperatingActivitiesCashFlowStatement	157000000	USD
CY2017	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	5148000000	USD
CY2016	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	7205000000	USD
CY2015	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	7927000000	USD
CY2017	us-gaap	Payments For Flight Equipment PaymentsForFlightEquipment	2704000000	USD
CY2016	us-gaap	Payments For Flight Equipment PaymentsForFlightEquipment	2617000000	USD
CY2015	us-gaap	Payments For Flight Equipment PaymentsForFlightEquipment	2223000000	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
CY2015	us-gaap	Payments To Acquire Other Productive Assets PaymentsToAcquireOtherProductiveAssets	722000000	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
CY2015	us-gaap	Payments To Acquire Equity Method Investments PaymentsToAcquireEquityMethodInvestments	500000000	USD
CY2017	us-gaap	Payments To Acquire Investments PaymentsToAcquireInvestments	925000000	USD
CY2016	us-gaap	Payments To Acquire Investments PaymentsToAcquireInvestments	1707000000	USD
CY2015	us-gaap	Payments To Acquire Investments PaymentsToAcquireInvestments	998000000	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
CY2015	us-gaap	Proceeds From Sale Maturity And Collections Of Investments ProceedsFromSaleMaturityAndCollectionsOfInvestments	739000000	USD
CY2017	us-gaap	Payments For Proceeds From Other Investing Activities PaymentsForProceedsFromOtherInvestingActivities	-111000000	USD
CY2016	us-gaap	Payments For Proceeds From Other Investing Activities PaymentsForProceedsFromOtherInvestingActivities	-257000000	USD
CY2015	us-gaap	Payments For Proceeds From Other Investing Activities PaymentsForProceedsFromOtherInvestingActivities	251000000	USD
CY2017	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-5366000000	USD
CY2016	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-2155000000	USD
CY2015	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-3955000000	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
CY2015	us-gaap	Repayments Of Long Term Debt And Capital Securities RepaymentsOfLongTermDebtAndCapitalSecurities	2558000000	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
CY2015	us-gaap	Payments For Repurchase Of Common Stock PaymentsForRepurchaseOfCommonStock	2200000000	USD
CY2017	us-gaap	Payments Of Dividends PaymentsOfDividends	731000000	USD
CY2016	us-gaap	Payments Of Dividends PaymentsOfDividends	509000000	USD
CY2015	us-gaap	Payments Of Dividends PaymentsOfDividends	359000000	USD
CY2017	us-gaap	Proceeds From Repayments Of Short Term Debt ProceedsFromRepaymentsOfShortTermDebt	636000000	USD
CY2015	us-gaap	Proceeds From Derivative Instrument Financing Activities ProceedsFromDerivativeInstrumentFinancingActivities	429000000	USD
CY2016	us-gaap	Proceeds From Repayments Of Short Term Debt ProceedsFromRepaymentsOfShortTermDebt	211000000	USD
CY2015	us-gaap	Proceeds From Repayments Of Short Term Debt ProceedsFromRepaymentsOfShortTermDebt	-340000000	USD
CY2017	us-gaap	Payments For Derivative Instrument Financing Activities PaymentsForDerivativeInstrumentFinancingActivities	244000000	USD
CY2016	us-gaap	Payments For Derivative Instrument Financing Activities PaymentsForDerivativeInstrumentFinancingActivities	451000000	USD
CY2015	us-gaap	Payments For Derivative Instrument Financing Activities PaymentsForDerivativeInstrumentFinancingActivities	71000000	USD
CY2017	us-gaap	Proceeds From Derivative Instrument Financing Activities ProceedsFromDerivativeInstrumentFinancingActivities	20000000	USD
CY2016	us-gaap	Proceeds From Derivative Instrument Financing Activities ProceedsFromDerivativeInstrumentFinancingActivities	291000000	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
CY2015	us-gaap	Proceeds From Issuance Of Long Term Debt ProceedsFromIssuanceOfLongTermDebt	1038000000	USD
CY2017	us-gaap	Proceeds From Payments For Other Financing Activities ProceedsFromPaymentsForOtherFinancingActivities	70000000	USD
CY2016	us-gaap	Proceeds From Payments For Other Financing Activities ProceedsFromPaymentsForOtherFinancingActivities	58000000	USD
CY2015	us-gaap	Proceeds From Payments For Other Financing Activities ProceedsFromPaymentsForOtherFinancingActivities	-27000000	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
CY2015	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	-4088000000	USD
CY2017	us-gaap	Cash And Cash Equivalents Period Increase Decrease CashAndCashEquivalentsPeriodIncreaseDecrease	-948000000	USD
CY2016	us-gaap	Cash And Cash Equivalents Period Increase Decrease CashAndCashEquivalentsPeriodIncreaseDecrease	790000000	USD
CY2015	us-gaap	Cash And Cash Equivalents Period Increase Decrease CashAndCashEquivalentsPeriodIncreaseDecrease	-116000000	USD
CY2016Q4	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	2762000000	USD
CY2015Q4	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	1972000000	USD
CY2014Q4	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	2088000000	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
CY2015Q4	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	1972000000	USD
CY2017	us-gaap	Interest Paid InterestPaid	390000000	USD
CY2016	us-gaap	Interest Paid InterestPaid	385000000	USD
CY2015	us-gaap	Interest Paid InterestPaid	452000000	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
CY2015	dal	Contribution Of Treasury Stock To Pension Plan Amount Contributed ContributionOfTreasuryStockToPensionPlanAmountContributed	0	USD
CY2017	us-gaap	Capital Lease Obligations Incurred CapitalLeaseObligationsIncurred	261000000	USD
CY2016	us-gaap	Capital Lease Obligations Incurred CapitalLeaseObligationsIncurred	86000000	USD
CY2015	us-gaap	Capital Lease Obligations Incurred CapitalLeaseObligationsIncurred	111000000	USD
CY2014Q4	us-gaap	Stockholders Equity StockholdersEquity	8813000000	USD
CY2015	us-gaap	Net Income Loss NetIncomeLoss	4526000000	USD
CY2015	us-gaap	Dividends Dividends	359000000	USD
CY2015	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	36000000	USD
CY2015	us-gaap	Stock Issued During Period Value Share Based Compensation StockIssuedDuringPeriodValueShareBasedCompensation	16000000	USD
CY2015	us-gaap	Stock Issued During Period Value Stock Options Exercised StockIssuedDuringPeriodValueStockOptionsExercised	18000000	USD
CY2015	us-gaap	Stock Repurchased And Retired During Period Value StockRepurchasedAndRetiredDuringPeriodValue	2200000000	USD
CY2015Q4	us-gaap	Stockholders Equity StockholdersEquity	10850000000	USD
CY2016	us-gaap	Net Income Loss NetIncomeLoss	4373000000	USD
CY2016	us-gaap	Cumulative Effect On Retained Earnings Net Of Tax1 CumulativeEffectOnRetainedEarningsNetOfTax1	95000000	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
CY2017Q4	us-gaap	Capitalized Computer Software Net CapitalizedComputerSoftwareNet	659000000	USD
CY2016Q4	us-gaap	Capitalized Computer Software Net CapitalizedComputerSoftwareNet	549000000	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	12287000000	USD
CY2017	us-gaap	Net Income Loss NetIncomeLoss	3577000000	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	13910000000	USD
CY2017	dal	Ownership Interest Percent Threshold To Consolidate OwnershipInterestPercentThresholdToConsolidate	0.50
CY2017	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	dal	Defined Benefit Plan Nonservice Costs DefinedBenefitPlanNonserviceCosts	50000000	USD
CY2017Q4	us-gaap	Accumulated Depreciation Depletion And Amortization Property Plant And Equipment AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment	14097000000	USD
CY2016Q4	us-gaap	Accumulated Depreciation Depletion And Amortization Property Plant And Equipment AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment	12456000000	USD
CY2017Q4	us-gaap	Property Plant And Equipment Net PropertyPlantAndEquipmentNet	26563000000	USD
CY2016Q4	us-gaap	Property Plant And Equipment Net PropertyPlantAndEquipmentNet	24375000000	USD
CY2017	us-gaap	Depreciation Nonproduction DepreciationNonproduction	2200000000	USD
CY2016	us-gaap	Depreciation Nonproduction DepreciationNonproduction	1900000000	USD
CY2015	us-gaap	Depreciation Nonproduction DepreciationNonproduction	1800000000	USD
CY2017	us-gaap	Capitalized Computer Software Amortization1 CapitalizedComputerSoftwareAmortization1	189000000	USD
CY2016	us-gaap	Capitalized Computer Software Amortization1 CapitalizedComputerSoftwareAmortization1	160000000	USD
CY2015	us-gaap	Capitalized Computer Software Amortization1 CapitalizedComputerSoftwareAmortization1	148000000	USD
CY2017	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><span style="font-family:inherit;font-size:10pt;"> </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 (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 impairment occurs, the impairment loss recognized is the amount by which the fleet'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>
CY2017Q4	us-gaap	Short Term Non Bank Loans And Notes Payable ShortTermNonBankLoansAndNotesPayable	1100000000	USD
CY2016Q4	us-gaap	Short Term Non Bank Loans And Notes Payable ShortTermNonBankLoansAndNotesPayable	431000000	USD
CY2017	us-gaap	Revenue Recognition Sales Of Services RevenueRecognitionSalesOfServices	Passenger Tickets<div style="line-height:120%;text-align:left;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;"><br/></span></div>We record sales of passenger tickets in air traffic liability. Passenger revenue is recognized when we provide transportation or when the ticket expires unused, reducing the related air traffic liability. We periodically evaluate the estimated air traffic liability and record any adjustments in our Consolidated Statements of Operations. These adjustments relate primarily to refunds, exchanges, transactions with other airlines and other items for which final settlement occurs in periods subsequent to the sale of the related tickets at amounts other than the original sales price.
CY2017	us-gaap	Revenue Recognition Loyalty Programs RevenueRecognitionLoyaltyPrograms	Frequent Flyer Program<div style="line-height:120%;text-align:left;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;"><br/></span></div><div style="line-height:120%;text-align:left;text-indent:18px;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;">Our SkyMiles program offers incentives to travel on Delta. This program allows customers to earn mileage credits by flying on Delta, Delta Connection and airlines that participate in the SkyMiles program, as well as through participating companies such as credit card companies, hotels and car rental agencies. We sell mileage credits to non-airline businesses, customers and other airlines. Effective January 1, 2015, the SkyMiles program was modified from a model in which customers earn redeemable mileage credits based on distance traveled to a model based on ticket price. This award change did not affect the way we account for the program. </span></div><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><div style="line-height:120%;text-align:left;text-indent:18px;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;">The SkyMiles program includes two types of transactions that are considered revenue arrangements with multiple deliverables. As discussed below, these are (1) passenger ticket sales earning mileage credits and (2) the sale of mileage credits to participating companies with which we have marketing agreements. Mileage credits are a separate unit of accounting as they can be redeemed by customers in future periods for air travel on Delta and participating airlines, membership in our Sky Club and other program awards. </span></div><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><div style="line-height:120%;text-align:left;text-indent:18px;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;font-style:italic;">Passenger Ticket Sales Earning Mileage Credits. </span><span style="font-family:inherit;font-size:10pt;">Passenger ticket sales earning mileage credits under our SkyMiles program provide customers with (1) mileage credits earned and (2) air transportation. We value each deliverable on a standalone basis. Our estimate of the selling price of a mileage credit is based on an analysis of our sales of mileage credits to other airlines and customers, which is re-evaluated at least annually. We use established ticket prices to determine the estimated selling price of air transportation. We allocate the total amount collected from passenger ticket sales between the deliverables based on their relative selling prices.</span></div><div style="line-height:120%;text-indent:18px;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;"><br/></span></div><div style="line-height:120%;text-align:left;text-indent:18px;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;">We defer revenue for the mileage credits related to passenger ticket sales when the credits are earned and recognize it as passenger revenue when miles are redeemed and services are provided. We record the air transportation portion of the passenger ticket sales in air traffic liability and recognize these amounts in passenger revenue when we provide transportation or when the ticket expires unused. </span></div><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><div style="line-height:120%;text-align:left;text-indent:18px;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;font-style:italic;">Sale of Mileage Credits.</span><span style="font-family:inherit;font-size:10pt;"> Customers may earn mileage credits through participating companies such as credit card companies, hotels and car rental agencies with which we have marketing agreements to sell mileage credits. Our contracts to sell mileage credits under these marketing agreements have multiple deliverables, as defined below.</span></div><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><div style="line-height:120%;text-align:left;text-indent:18px;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;">Our most significant contract to sell mileage credits relates to our co-brand credit card relationship with American Express. Our agreements with American Express provide for joint marketing, grant certain benefits to Delta-American Express co-branded credit card holders ("Cardholders") and American Express Membership Rewards program participants and allow American Express to market using our customer database. Cardholders earn mileage credits for making purchases using co-branded cards, may check their first bag for free, are granted discounted access to Delta Sky Club lounges and receive other benefits while traveling on Delta. These benefits that we provide in the form of separate products and services under the SkyMiles agreements are referred to as "deliverables." Additionally, participants in the American Express Membership Rewards program may exchange their points for mileage credits under the SkyMiles program. As a result, we sell mileage credits at agreed-upon rates to American Express for provision to their customers under the co-brand credit card program and the Membership Rewards program.</span></div><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><div style="line-height:120%;text-indent:18px;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;">Our marketing agreements with American Express extend to 2022. We account for the agreements consistent with the accounting method that allocates the consideration received to the individual products and services delivered based on their relative selling prices. We determined our best estimate of the selling prices by considering discounted cash flow analysis using multiple inputs and assumptions, including: (1) the expected number of miles awarded and number of miles redeemed, (2) the rate at which we sell mileage credits to other airlines, (3) published rates on our website for baggage fees, discounted access to Delta Sky Club lounges and other benefits while traveling on Delta and (4) brand value.</span></div><div style="line-height:120%;text-indent:18px;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;"><br/></span></div><div style="line-height:120%;text-indent:18px;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;">We recognize revenue as we deliver each sales element. We defer the travel deliverable (mileage credits) as part of frequent flyer deferred revenue and recognize passenger revenue as the mileage credits are used for travel. The revenue allocated to the remaining deliverables is recorded in other revenue. We recognize the revenue for these services as they are performed.</span></div><div style="line-height:120%;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;font-style:italic;">Breakage. </span>For mileage credits that we estimate are not likely to be redeemed ("breakage"), we recognize the associated value proportionally during the period in which the remaining mileage credits are expected to be redeemed. Management uses statistical models to estimate breakage based on historical redemption patterns. A change in assumptions as to the period over which mileage credits are expected to be redeemed, the actual redemption activity for mileage credits or the estimated fair value of mileage credits expected to be redeemed could have a material impact on our revenue in the year in which the change occurs and in future years.
CY2017	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 incurred.
CY2017	us-gaap	Advertising Expense AdvertisingExpense	284000000	USD
CY2016	us-gaap	Advertising Expense AdvertisingExpense	277000000	USD
CY2015	us-gaap	Advertising Expense AdvertisingExpense	230000000	USD
CY2017Q4	us-gaap	Available For Sale Securities Debt Maturities Within One Year Fair Value AvailableForSaleSecuritiesDebtMaturitiesWithinOneYearFairValue	323000000	USD
CY2017Q4	dal	Available For Sale Securities Debt Maturities After One Year Through Three Years Fair Value AvailableForSaleSecuritiesDebtMaturitiesAfterOneYearThroughThreeYearsFairValue	465000000	USD
CY2017Q4	dal	Available For Sale Securities Debt Maturities After Three Years Through Five Years Fair Value AvailableForSaleSecuritiesDebtMaturitiesAfterThreeYearsThroughFiveYearsFairValue	19000000	USD
CY2017Q4	dal	Available For Sale Securities Debt Maturities After Five Years Fair Value AvailableForSaleSecuritiesDebtMaturitiesAfterFiveYearsFairValue	18000000	USD
CY2017Q4	us-gaap	Available For Sale Securities Debt Maturities Single Maturity Date AvailableForSaleSecuritiesDebtMaturitiesSingleMaturityDate	825000000	USD
CY2017Q4	us-gaap	Derivative Fair Value Of Derivative Net DerivativeFairValueOfDerivativeNet	-83000000	USD
CY2016Q4	us-gaap	Derivative Fair Value Of Derivative Net DerivativeFairValueOfDerivativeNet	-297000000	USD
CY2017Q4	us-gaap	Derivative Fair Value Of Derivative Net DerivativeFairValueOfDerivativeNet	-83000000	USD
CY2016Q4	us-gaap	Derivative Fair Value Of Derivative Net DerivativeFairValueOfDerivativeNet	-297000000	USD
CY2017Q4	us-gaap	Derivative Collateral Right To Reclaim Cash DerivativeCollateralRightToReclaimCash	43000000	USD
CY2016Q4	us-gaap	Derivative Collateral Right To Reclaim Cash DerivativeCollateralRightToReclaimCash	38000000	USD
CY2017Q4	us-gaap	Indefinite Lived Intangible Assets Excluding Goodwill IndefiniteLivedIntangibleAssetsExcludingGoodwill	4716000000	USD
CY2016Q4	us-gaap	Indefinite Lived Intangible Assets Excluding Goodwill IndefiniteLivedIntangibleAssetsExcludingGoodwill	4696000000	USD
CY2017Q4	us-gaap	Finite Lived Intangible Assets Gross FiniteLivedIntangibleAssetsGross	976000000	USD
CY2017Q4	us-gaap	Finite Lived Intangible Assets Accumulated Amortization FiniteLivedIntangibleAssetsAccumulatedAmortization	845000000	USD
CY2016Q4	us-gaap	Finite Lived Intangible Assets Gross FiniteLivedIntangibleAssetsGross	976000000	USD
CY2016Q4	us-gaap	Finite Lived Intangible Assets Accumulated Amortization FiniteLivedIntangibleAssetsAccumulatedAmortization	828000000	USD
CY2017	us-gaap	Amortization Of Intangible Assets AmortizationOfIntangibleAssets	17000000	USD
CY2016	us-gaap	Amortization Of Intangible Assets AmortizationOfIntangibleAssets	17000000	USD
CY2015	us-gaap	Amortization Of Intangible Assets AmortizationOfIntangibleAssets	18000000	USD
CY2017Q4	us-gaap	Finite Lived Intangible Assets Amortization Expense Next Twelve Months FiniteLivedIntangibleAssetsAmortizationExpenseNextTwelveMonths	16000000	USD
CY2017Q4	us-gaap	Debt Instrument Carrying Amount DebtInstrumentCarryingAmount	8539000000	USD
CY2016Q4	us-gaap	Debt Instrument Carrying Amount DebtInstrumentCarryingAmount	7112000000	USD
CY2017Q4	us-gaap	Debt Instrument Unamortized Discount Premium Net DebtInstrumentUnamortizedDiscountPremiumNet	99000000	USD
CY2016Q4	us-gaap	Debt Instrument Unamortized Discount Premium Net DebtInstrumentUnamortizedDiscountPremiumNet	104000000	USD
CY2017Q4	us-gaap	Long Term Debt LongTermDebt	8440000000	USD
CY2016Q4	us-gaap	Long Term Debt LongTermDebt	7008000000	USD
CY2017Q4	us-gaap	Long Term Debt Current LongTermDebtCurrent	2145000000	USD
CY2016Q4	us-gaap	Long Term Debt Current LongTermDebtCurrent	1009000000	USD
CY2017Q4	us-gaap	Long Term Debt Noncurrent LongTermDebtNoncurrent	6295000000	USD
CY2016Q4	us-gaap	Long Term Debt Noncurrent LongTermDebtNoncurrent	5999000000	USD
CY2017	dal	Debt Instrument Periodic Payment Percentage Of Principal DebtInstrumentPeriodicPaymentPercentageOfPrincipal	0.01
CY2017Q4	us-gaap	Line Of Credit Facility Current Borrowing Capacity LineOfCreditFacilityCurrentBorrowingCapacity	2450000000	USD
CY2017Q4	us-gaap	Long Term Debt Maturities Repayments Of Principal In Next Twelve Months LongTermDebtMaturitiesRepaymentsOfPrincipalInNextTwelveMonths	2183000000	USD
CY2017Q4	dal	Debt Instrument Amortization Discount Premium Net Year One DebtInstrumentAmortizationDiscountPremiumNetYearOne	42000000	USD
CY2017Q4	us-gaap	Long Term Debt Maturities Repayments Of Principal In Year Two LongTermDebtMaturitiesRepaymentsOfPrincipalInYearTwo	1359000000	USD
CY2017Q4	dal	Debt Instrument Amortization Discount Premium Net Year Two DebtInstrumentAmortizationDiscountPremiumNetYearTwo	30000000	USD
CY2017Q4	us-gaap	Long Term Debt Maturities Repayments Of Principal In Year Three LongTermDebtMaturitiesRepaymentsOfPrincipalInYearThree	1983000000	USD
CY2017Q4	dal	Debt Instrument Amortization Discount Premium Net Year Three DebtInstrumentAmortizationDiscountPremiumNetYearThree	8000000	USD
CY2017Q4	us-gaap	Long Term Debt Maturities Repayments Of Principal In Year Four LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFour	345000000	USD
CY2017Q4	dal	Debt Instrument Amortization Discount Premium Net Year Four DebtInstrumentAmortizationDiscountPremiumNetYearFour	6000000	USD
CY2017Q4	us-gaap	Long Term Debt Maturities Repayments Of Principal In Year Five LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFive	2009000000	USD
CY2017Q4	dal	Debt Instrument Amortization Discount Premium Net Year Five DebtInstrumentAmortizationDiscountPremiumNetYearFive	7000000	USD
CY2017Q4	us-gaap	Long Term Debt Maturities Repayments Of Principal After Year Five LongTermDebtMaturitiesRepaymentsOfPrincipalAfterYearFive	660000000	USD
CY2017Q4	dal	Debt Instrument Amortization Discount Premium Net After Year Five DebtInstrumentAmortizationDiscountPremiumNetAfterYearFive	6000000	USD
CY2017Q4	us-gaap	Debt Instrument Carrying Amount DebtInstrumentCarryingAmount	8539000000	USD
CY2017Q4	us-gaap	Debt Instrument Unamortized Discount Premium Net DebtInstrumentUnamortizedDiscountPremiumNet	99000000	USD
CY2017Q4	us-gaap	Long Term Debt LongTermDebt	8440000000	USD
CY2017Q4	us-gaap	Debt Instrument Carrying Amount DebtInstrumentCarryingAmount	8539000000	USD
CY2016Q4	us-gaap	Debt Instrument Carrying Amount DebtInstrumentCarryingAmount	7112000000	USD
CY2017Q4	us-gaap	Debt Instrument Unamortized Discount Premium Net DebtInstrumentUnamortizedDiscountPremiumNet	99000000	USD
CY2016Q4	us-gaap	Debt Instrument Unamortized Discount Premium Net DebtInstrumentUnamortizedDiscountPremiumNet	104000000	USD
CY2017Q4	us-gaap	Debt Longterm And Shortterm Combined Amount DebtLongtermAndShorttermCombinedAmount	8440000000	USD
CY2016Q4	us-gaap	Debt Longterm And Shortterm Combined Amount DebtLongtermAndShorttermCombinedAmount	7008000000	USD
CY2017Q4	us-gaap	Debt Instrument Fair Value DebtInstrumentFairValue	8700000000	USD
CY2016Q4	us-gaap	Debt Instrument Fair Value DebtInstrumentFairValue	7300000000	USD
CY2017	us-gaap	Lease And Rental Expense LeaseAndRentalExpense	1300000000	USD
CY2015	us-gaap	Lease And Rental Expense LeaseAndRentalExpense	1200000000	USD
CY2017Q4	us-gaap	Capital Leases Future Minimum Payments Due Current CapitalLeasesFutureMinimumPaymentsDueCurrent	116000000	USD
CY2017Q4	us-gaap	Capital Leases Future Minimum Payments Due In Two Years CapitalLeasesFutureMinimumPaymentsDueInTwoYears	92000000	USD
CY2017Q4	us-gaap	Capital Leases Future Minimum Payments Due In Three Years CapitalLeasesFutureMinimumPaymentsDueInThreeYears	65000000	USD
CY2017Q4	us-gaap	Capital Leases Future Minimum Payments Due In Four Years CapitalLeasesFutureMinimumPaymentsDueInFourYears	41000000	USD
CY2017Q4	us-gaap	Capital Leases Future Minimum Payments Due In Five Years CapitalLeasesFutureMinimumPaymentsDueInFiveYears	24000000	USD
CY2017Q4	us-gaap	Capital Leases Future Minimum Payments Due Thereafter CapitalLeasesFutureMinimumPaymentsDueThereafter	126000000	USD
CY2017Q4	us-gaap	Capital Leases Future Minimum Payments Due CapitalLeasesFutureMinimumPaymentsDue	464000000	USD
CY2017Q4	us-gaap	Capital Leases Future Minimum Payments Interest Included In Payments CapitalLeasesFutureMinimumPaymentsInterestIncludedInPayments	70000000	USD
CY2017Q4	us-gaap	Capital Leases Future Minimum Payments Present Value Of Net Minimum Payments CapitalLeasesFutureMinimumPaymentsPresentValueOfNetMinimumPayments	394000000	USD
CY2017Q4	us-gaap	Capital Lease Obligations Current CapitalLeaseObligationsCurrent	97000000	USD
CY2017Q4	us-gaap	Capital Lease Obligations Noncurrent CapitalLeaseObligationsNoncurrent	297000000	USD
CY2017Q4	us-gaap	Operating Leases Future Minimum Payments Due Current OperatingLeasesFutureMinimumPaymentsDueCurrent	1735000000	USD
CY2017Q4	us-gaap	Operating Leases Future Minimum Payments Due In Two Years OperatingLeasesFutureMinimumPaymentsDueInTwoYears	1589000000	USD
CY2017Q4	us-gaap	Operating Leases Future Minimum Payments Due In Three Years OperatingLeasesFutureMinimumPaymentsDueInThreeYears	1430000000	USD
CY2017Q4	us-gaap	Operating Leases Future Minimum Payments Due In Four Years OperatingLeasesFutureMinimumPaymentsDueInFourYears	1156000000	USD
CY2017Q4	us-gaap	Operating Leases Future Minimum Payments Due In Five Years OperatingLeasesFutureMinimumPaymentsDueInFiveYears	1036000000	USD
CY2017Q4	us-gaap	Operating Leases Future Minimum Payments Due Thereafter OperatingLeasesFutureMinimumPaymentsDueThereafter	9290000000	USD
CY2017Q4	us-gaap	Operating Leases Future Minimum Payments Due OperatingLeasesFutureMinimumPaymentsDue	16236000000	USD
CY2010Q4	dal	Special Project Bonds Face Amount Issued By Others SpecialProjectBondsFaceAmountIssuedByOthers	800000000	USD
CY2017Q4	us-gaap	Construction In Progress Gross ConstructionInProgressGross	691000000	USD
CY2017Q4	us-gaap	Contractual Obligation ContractualObligation	744000000	USD
CY2017	dal	Unfunded Liability Defined Benefit Plan Interest Rate UnfundedLiabilityDefinedBenefitPlanInterestRate	0.0885
CY2017Q4	us-gaap	Defined Benefit Plan Expected Future Employer Contributions Next Fiscal Year DefinedBenefitPlanExpectedFutureEmployerContributionsNextFiscalYear	500000000	USD
CY2017	us-gaap	Defined Contribution Plan Cost Recognized DefinedContributionPlanCostRecognized	875000000	USD
CY2016	us-gaap	Defined Contribution Plan Cost Recognized DefinedContributionPlanCostRecognized	733000000	USD
CY2015	us-gaap	Defined Contribution Plan Cost Recognized DefinedContributionPlanCostRecognized	592000000	USD
CY2017	dal	Assumed Health Care Plan Pre Age AssumedHealthCarePlanPreAge	P65Y
CY2017	dal	Assumed Health Care Plan Post Age AssumedHealthCarePlanPostAge	P65Y
CY2017Q4	us-gaap	Defined Benefit Plan Expected Amortization Next Fiscal Year DefinedBenefitPlanExpectedAmortizationNextFiscalYear	277000000	USD
CY2017Q4	us-gaap	Defined Benefit Plan Assumptions Used Calculating Benefit Obligation Discount Rate DefinedBenefitPlanAssumptionsUsedCalculatingBenefitObligationDiscountRate	0.0369
CY2016Q4	us-gaap	Defined Benefit Plan Assumptions Used Calculating Benefit Obligation Discount Rate DefinedBenefitPlanAssumptionsUsedCalculatingBenefitObligationDiscountRate	0.0420
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
CY2015	us-gaap	Defined Benefit Plan Assumptions Used Calculating Net Periodic Benefit Cost Expected Long Term Return On Assets DefinedBenefitPlanAssumptionsUsedCalculatingNetPeriodicBenefitCostExpectedLongTermReturnOnAssets	0.0894
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
CY2015Q4	us-gaap	Defined Benefit Plan Health Care Cost Trend Rate Assumed Next Fiscal Year DefinedBenefitPlanHealthCareCostTrendRateAssumedNextFiscalYear	0.0700
CY2017Q4	us-gaap	Defined Benefit Plan Ultimate Health Care Cost Trend Rate1 DefinedBenefitPlanUltimateHealthCareCostTrendRate1	0.0500
CY2017	dal	Defined Benefit Plan Percent Change Assumed In Health Care Cost Trend Metric DefinedBenefitPlanPercentChangeAssumedInHealthCareCostTrendMetric	0.01
CY2017	us-gaap	Defined Benefit Plan Assumptions Used Calculating Net Periodic Benefit Cost Expected Long Term Return On Assets DefinedBenefitPlanAssumptionsUsedCalculatingNetPeriodicBenefitCostExpectedLongTermReturnOnAssets	0.0896
CY2017	us-gaap	Other Labor Related Expenses OtherLaborRelatedExpenses	1100000000	USD
CY2016	us-gaap	Other Labor Related Expenses OtherLaborRelatedExpenses	1100000000	USD
CY2015	us-gaap	Other Labor Related Expenses OtherLaborRelatedExpenses	1500000000	USD
CY2017Q4	dei	Entity Number Of Employees EntityNumberOfEmployees	87000	employee
CY2017Q4	dal	Percentage Of Employees Represented By Unions Under Collective Bargaining Agreements PercentageOfEmployeesRepresentedByUnionsUnderCollectiveBargainingAgreements	0.19
CY2017	us-gaap	Current Federal Tax Expense Benefit CurrentFederalTaxExpenseBenefit	4000000	USD
CY2016	us-gaap	Current Federal Tax Expense Benefit CurrentFederalTaxExpenseBenefit	0	USD
CY2015	us-gaap	Current Federal Tax Expense Benefit CurrentFederalTaxExpenseBenefit	23000000	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
CY2015	us-gaap	Current State And Local Tax Expense Benefit CurrentStateAndLocalTaxExpenseBenefit	25000000	USD
CY2017	us-gaap	Current Foreign Tax Expense Benefit CurrentForeignTaxExpenseBenefit	54000000	USD
CY2016	us-gaap	Current Foreign Tax Expense Benefit CurrentForeignTaxExpenseBenefit	12000000	USD
CY2015	us-gaap	Current Foreign Tax Expense Benefit CurrentForeignTaxExpenseBenefit	2000000	USD
CY2017	us-gaap	Deferred Federal Income Tax Expense Benefit DeferredFederalIncomeTaxExpenseBenefit	1911000000	USD
CY2016	us-gaap	Deferred Federal Income Tax Expense Benefit DeferredFederalIncomeTaxExpenseBenefit	2080000000	USD
CY2015	us-gaap	Deferred Federal Income Tax Expense Benefit DeferredFederalIncomeTaxExpenseBenefit	2409000000	USD
CY2017	us-gaap	Deferred State And Local Income Tax Expense Benefit DeferredStateAndLocalIncomeTaxExpenseBenefit	160000000	USD
CY2016	us-gaap	Deferred State And Local Income Tax Expense Benefit DeferredStateAndLocalIncomeTaxExpenseBenefit	143000000	USD
CY2015	us-gaap	Deferred State And Local Income Tax Expense Benefit DeferredStateAndLocalIncomeTaxExpenseBenefit	172000000	USD
CY2017	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	2124000000	USD
CY2016	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	2263000000	USD
CY2015	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	2631000000	USD
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
CY2015	us-gaap	Effective Income Tax Rate Reconciliation At Federal Statutory Income Tax Rate EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate	0.350
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
CY2015	us-gaap	Effective Income Tax Rate Reconciliation State And Local Income Taxes EffectiveIncomeTaxRateReconciliationStateAndLocalIncomeTaxes	0.018
CY2017	us-gaap	Effective Income Tax Rate Reconciliation Change In Deferred Tax Assets Valuation Allowance EffectiveIncomeTaxRateReconciliationChangeInDeferredTaxAssetsValuationAllowance	0
CY2016	us-gaap	Effective Income Tax Rate Reconciliation Change In Deferred Tax Assets Valuation Allowance EffectiveIncomeTaxRateReconciliationChangeInDeferredTaxAssetsValuationAllowance	0
CY2015	us-gaap	Effective Income Tax Rate Reconciliation Change In Deferred Tax Assets Valuation Allowance EffectiveIncomeTaxRateReconciliationChangeInDeferredTaxAssetsValuationAllowance	-0.002
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	-0.020
CY2015	us-gaap	Effective Income Tax Rate Reconciliation Foreign Income Tax Rate Differential EffectiveIncomeTaxRateReconciliationForeignIncomeTaxRateDifferential	0
CY2017	dal	Effective Income Tax Rate Reconciliation Tax Cutsand Jobs Actof2017 Transition Taxon Accumulated Foreign Earnings Percent EffectiveIncomeTaxRateReconciliationTaxCutsandJobsActof2017TransitionTaxonAccumulatedForeignEarningsPercent	0.026
CY2016	dal	Effective Income Tax Rate Reconciliation Tax Cutsand Jobs Actof2017 Transition Taxon Accumulated Foreign Earnings Percent EffectiveIncomeTaxRateReconciliationTaxCutsandJobsActof2017TransitionTaxonAccumulatedForeignEarningsPercent	0
CY2015	dal	Effective Income Tax Rate Reconciliation Tax Cutsand Jobs Actof2017 Transition Taxon Accumulated Foreign Earnings Percent EffectiveIncomeTaxRateReconciliationTaxCutsandJobsActof2017TransitionTaxonAccumulatedForeignEarningsPercent	0
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
CY2015	us-gaap	Effective Income Tax Rate Reconciliation Other Adjustments EffectiveIncomeTaxRateReconciliationOtherAdjustments	0.002
CY2017	us-gaap	Effective Income Tax Rate Continuing Operations EffectiveIncomeTaxRateContinuingOperations	0.372
CY2016	us-gaap	Effective Income Tax Rate Continuing Operations EffectiveIncomeTaxRateContinuingOperations	0.341
CY2015	us-gaap	Effective Income Tax Rate Continuing Operations EffectiveIncomeTaxRateContinuingOperations	0.368
CY2017Q4	dal	Tax Cutsand Jobs Actof2017 Incomplete Accounting Provisional Income Tax Expense Benefit TaxCutsandJobsActof2017IncompleteAccountingProvisionalIncomeTaxExpenseBenefit	150000000	USD
CY2017Q4	dal	Effective Income Tax Rate Reconciliation Tax Cutsand Jobs Actof2017 Transition Taxon Accumulated Foreign Earnings Percent EffectiveIncomeTaxRateReconciliationTaxCutsandJobsActof2017TransitionTaxonAccumulatedForeignEarningsPercent	0.026
CY2017Q4	dal	Tax Cutsand Jobs Actof2017 Incomplete Accounting Provisional Undistributed Accumulated Earningsof Foreign Subsidiary TaxCutsandJobsActof2017IncompleteAccountingProvisionalUndistributedAccumulatedEarningsofForeignSubsidiary	732000000	USD
CY2016Q4	us-gaap	Deferred Tax Liabilities Undistributed Foreign Earnings DeferredTaxLiabilitiesUndistributedForeignEarnings	379000000	USD
CY2017Q4	us-gaap	Deferred Tax Assets Operating Loss Carryforwards DeferredTaxAssetsOperatingLossCarryforwards	1440000000	USD
CY2016Q4	us-gaap	Deferred Tax Assets Operating Loss Carryforwards DeferredTaxAssetsOperatingLossCarryforwards	2485000000	USD
CY2017Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Compensation And Benefits DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefits	2545000000	USD
CY2016Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Compensation And Benefits DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefits	5259000000	USD
CY2017Q4	us-gaap	Deferred Tax Assets Tax Credit Carryforwards Alternative Minimum Tax DeferredTaxAssetsTaxCreditCarryforwardsAlternativeMinimumTax	379000000	USD
CY2016Q4	us-gaap	Deferred Tax Assets Tax Credit Carryforwards Alternative Minimum Tax DeferredTaxAssetsTaxCreditCarryforwardsAlternativeMinimumTax	379000000	USD
CY2017Q4	us-gaap	Deferred Tax Assets Deferred Income DeferredTaxAssetsDeferredIncome	1024000000	USD
CY2016Q4	us-gaap	Deferred Tax Assets Deferred Income DeferredTaxAssetsDeferredIncome	1544000000	USD
CY2017Q4	us-gaap	Deferred Tax Assets Other DeferredTaxAssetsOther	746000000	USD
CY2016Q4	us-gaap	Deferred Tax Assets Other DeferredTaxAssetsOther	1075000000	USD
CY2017Q4	us-gaap	Deferred Tax Assets Valuation Allowance DeferredTaxAssetsValuationAllowance	19000000	USD
CY2016Q4	us-gaap	Deferred Tax Assets Valuation Allowance DeferredTaxAssetsValuationAllowance	40000000	USD
CY2017Q4	us-gaap	Deferred Tax Assets Net DeferredTaxAssetsNet	6115000000	USD
CY2016Q4	us-gaap	Deferred Tax Assets Net DeferredTaxAssetsNet	10702000000	USD
CY2017Q4	us-gaap	Deferred Tax Liabilities Property Plant And Equipment DeferredTaxLiabilitiesPropertyPlantAndEquipment	3936000000	USD
CY2016Q4	us-gaap	Deferred Tax Liabilities Property Plant And Equipment DeferredTaxLiabilitiesPropertyPlantAndEquipment	5701000000	USD
CY2017Q4	us-gaap	Deferred Tax Liabilities Goodwill And Intangible Assets Intangible Assets DeferredTaxLiabilitiesGoodwillAndIntangibleAssetsIntangibleAssets	1070000000	USD
CY2016Q4	us-gaap	Deferred Tax Liabilities Goodwill And Intangible Assets Intangible Assets DeferredTaxLiabilitiesGoodwillAndIntangibleAssetsIntangibleAssets	1691000000	USD
CY2017Q4	us-gaap	Deferred Tax Liabilities Other DeferredTaxLiabilitiesOther	174000000	USD
CY2016Q4	us-gaap	Deferred Tax Liabilities Other DeferredTaxLiabilitiesOther	246000000	USD
CY2017Q4	us-gaap	Deferred Income Tax Liabilities DeferredIncomeTaxLiabilities	5180000000	USD
CY2016Q4	us-gaap	Deferred Income Tax Liabilities DeferredIncomeTaxLiabilities	7638000000	USD
CY2017Q4	us-gaap	Deferred Tax Assets Liabilities Net DeferredTaxAssetsLiabilitiesNet	935000000	USD
CY2016Q4	us-gaap	Deferred Tax Assets Liabilities Net DeferredTaxAssetsLiabilitiesNet	3064000000	USD
CY2017Q4	us-gaap	Deferred Tax Assets Tax Credit Carryforwards Alternative Minimum Tax DeferredTaxAssetsTaxCreditCarryforwardsAlternativeMinimumTax	379000000	USD
CY2017Q4	us-gaap	Operating Loss Carryforwards OperatingLossCarryforwards	5100000000	USD
CY2017	dal	Deferred Income Tax Expense Benefit Pension Obligation DeferredIncomeTaxExpenseBenefitPensionObligation	700000000	USD
CY2017	dal	Pension Obligation Time Frame For Extinguishment PensionObligationTimeFrameForExtinguishment	P25Y
CY2017Q4	dal	Capital Stock Shares Authorized CapitalStockSharesAuthorized	2000000000.0	shares
CY2017Q4	us-gaap	Common Stock Shares Authorized CommonStockSharesAuthorized	1500000000	shares
CY2017Q4	us-gaap	Common Stock Par Or Stated Value Per Share CommonStockParOrStatedValuePerShare	0.0001
CY2017Q4	us-gaap	Preferred Stock Shares Authorized PreferredStockSharesAuthorized	500000000	shares
CY2017	us-gaap	Treasury Stock Acquired Average Cost Per Share TreasuryStockAcquiredAverageCostPerShare	21.19
CY2016	us-gaap	Treasury Stock Acquired Average Cost Per Share TreasuryStockAcquiredAverageCostPerShare	19.40
CY2017Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Number Of Shares Authorized ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAuthorized	163000000	shares
CY2017Q4	us-gaap	Common Stock Capital Shares Reserved For Future Issuance CommonStockCapitalSharesReservedForFutureIssuance	30000000	shares
CY2017	us-gaap	Share Based Compensation ShareBasedCompensation	108000000	USD
CY2016	us-gaap	Share Based Compensation ShareBasedCompensation	105000000	USD
CY2015	us-gaap	Share Based Compensation ShareBasedCompensation	76000000	USD
CY2017Q4	us-gaap	Employee Service Share Based Compensation Nonvested Awards Total Compensation Cost Not Yet Recognized EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized	82000000	USD
CY2017Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Nonvested Number ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber	2600000	shares
CY2017Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Number ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber	1900000	shares
CY2017Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Exercisable Number ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableNumber	771000	shares
CY2017Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Exercisable Weighted Average Exercise Price ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableWeightedAverageExercisePrice	38.59
CY2017	dal	Effective Income Tax Rate Reconciliation Sharebased Compensation Excess Tax Benefit Amount EffectiveIncomeTaxRateReconciliationSharebasedCompensationExcessTaxBenefitAmount	21000000	USD
CY2016	dal	Effective Income Tax Rate Reconciliation Sharebased Compensation Excess Tax Benefit Amount EffectiveIncomeTaxRateReconciliationSharebasedCompensationExcessTaxBenefitAmount	33000000	USD
CY2015	us-gaap	Other Comprehensive Income Loss Before Reclassifications Net Of Tax OtherComprehensiveIncomeLossBeforeReclassificationsNetOfTax	8000000	USD
CY2015	us-gaap	Reclassification From Accumulated Other Comprehensive Income Current Period Net Of Tax ReclassificationFromAccumulatedOtherComprehensiveIncomeCurrentPeriodNetOfTax	-28000000	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
CY2017	us-gaap	Number Of Operating Segments NumberOfOperatingSegments	2	segment
CY2017	us-gaap	Revenues Revenues	41244000000	USD
CY2017	us-gaap	Operating Income Loss OperatingIncomeLoss	6114000000	USD
CY2017	us-gaap	Interest Expense InterestExpense	396000000	USD
CY2017	us-gaap	Depreciation Depletion And Amortization DepreciationDepletionAndAmortization	2235000000	USD
CY2017Q4	us-gaap	Assets Assets	53292000000	USD
CY2017	us-gaap	Payments To Acquire Productive Assets PaymentsToAcquireProductiveAssets	3891000000	USD
CY2016	us-gaap	Revenues Revenues	39639000000	USD
CY2016	us-gaap	Operating Income Loss OperatingIncomeLoss	6952000000	USD
CY2016	us-gaap	Interest Expense InterestExpense	388000000	USD
CY2016	us-gaap	Depreciation Depletion And Amortization DepreciationDepletionAndAmortization	1902000000	USD
CY2016Q4	us-gaap	Assets Assets	51261000000	USD
CY2016	us-gaap	Payments To Acquire Productive Assets PaymentsToAcquireProductiveAssets	3391000000	USD
CY2015	us-gaap	Revenues Revenues	40704000000	USD
CY2015	us-gaap	Operating Income Loss OperatingIncomeLoss	7802000000	USD
CY2015	us-gaap	Interest Expense InterestExpense	481000000	USD
CY2015	us-gaap	Depreciation Depletion And Amortization DepreciationDepletionAndAmortization	1835000000	USD
CY2015Q4	us-gaap	Assets Assets	53134000000	USD
CY2015	us-gaap	Payments To Acquire Productive Assets PaymentsToAcquireProductiveAssets	2945000000	USD
CY2017	us-gaap	Revenues Revenues	41244000000	USD
CY2016	us-gaap	Revenues Revenues	39639000000	USD
CY2015	us-gaap	Revenues Revenues	40704000000	USD
CY2016Q4	us-gaap	Restructuring Reserve RestructuringReserve	333000000	USD
CY2015Q4	us-gaap	Restructuring Reserve RestructuringReserve	467000000	USD
CY2014Q4	us-gaap	Restructuring Reserve RestructuringReserve	504000000	USD
CY2017	us-gaap	Payments For Restructuring PaymentsForRestructuring	103000000	USD
CY2016	us-gaap	Payments For Restructuring PaymentsForRestructuring	144000000	USD
CY2015	us-gaap	Payments For Restructuring PaymentsForRestructuring	127000000	USD
CY2017	us-gaap	Restructuring Reserve Accrual Adjustment1 RestructuringReserveAccrualAdjustment1	7000000	USD
CY2016	us-gaap	Restructuring Reserve Accrual Adjustment1 RestructuringReserveAccrualAdjustment1	10000000	USD
CY2015	us-gaap	Restructuring Reserve Accrual Adjustment1 RestructuringReserveAccrualAdjustment1	90000000	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
CY2017	us-gaap	Net Income Loss NetIncomeLoss	3577000000	USD
CY2016	us-gaap	Net Income Loss NetIncomeLoss	4373000000	USD
CY2015	us-gaap	Net Income Loss NetIncomeLoss	4526000000	USD
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
CY2015	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	797000000	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
CY2015	us-gaap	Incremental Common Shares Attributable To Share Based Payment Arrangements IncrementalCommonSharesAttributableToShareBasedPaymentArrangements	7000000	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
CY2015	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	804000000	shares
CY2017	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	4.97
CY2016	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	5.82
CY2015	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	5.68
CY2017	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	4.95
CY2016	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	5.79
CY2015	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	5.63
CY2017Q1	us-gaap	Revenues Revenues	9148000000	USD
CY2017Q2	us-gaap	Revenues Revenues	10791000000	USD
CY2017Q3	us-gaap	Revenues Revenues	11060000000	USD
CY2017Q4	us-gaap	Revenues Revenues	10245000000	USD
CY2017Q1	us-gaap	Operating Income Loss OperatingIncomeLoss	1053000000	USD
CY2017Q2	us-gaap	Operating Income Loss OperatingIncomeLoss	2028000000	USD
CY2017Q3	us-gaap	Operating Income Loss OperatingIncomeLoss	1839000000	USD
CY2017Q4	us-gaap	Operating Income Loss OperatingIncomeLoss	1193000000	USD
CY2017Q1	us-gaap	Net Income Loss NetIncomeLoss	603000000	USD
CY2017Q2	us-gaap	Net Income Loss NetIncomeLoss	1224000000	USD
CY2017Q3	us-gaap	Net Income Loss NetIncomeLoss	1178000000	USD
CY2017Q4	us-gaap	Net Income Loss NetIncomeLoss	572000000	USD
CY2017Q1	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.83
CY2017Q2	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	1.68
CY2017Q3	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	1.64
CY2017Q4	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.81
CY2017Q1	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.82
CY2017Q2	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	1.68
CY2017Q3	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	1.64
CY2017Q4	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.80
CY2016Q1	us-gaap	Revenues Revenues	9251000000	USD
CY2016Q2	us-gaap	Revenues Revenues	10447000000	USD
CY2016Q3	us-gaap	Revenues Revenues	10483000000	USD
CY2016Q4	us-gaap	Revenues Revenues	9458000000	USD
CY2016Q1	us-gaap	Operating Income Loss OperatingIncomeLoss	1540000000	USD
CY2016Q2	us-gaap	Operating Income Loss OperatingIncomeLoss	2423000000	USD
CY2016Q3	us-gaap	Operating Income Loss OperatingIncomeLoss	1969000000	USD
CY2016Q4	us-gaap	Operating Income Loss OperatingIncomeLoss	1020000000	USD
CY2016Q1	us-gaap	Net Income Loss NetIncomeLoss	946000000	USD
CY2016Q2	us-gaap	Net Income Loss NetIncomeLoss	1546000000	USD
CY2016Q3	us-gaap	Net Income Loss NetIncomeLoss	1259000000	USD
CY2016Q4	us-gaap	Net Income Loss NetIncomeLoss	622000000	USD
CY2016Q1	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	1.22
CY2016Q2	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	2.04
CY2016Q3	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	1.70
CY2016Q4	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.85
CY2016Q1	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	1.21
CY2016Q2	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	2.03
CY2016Q3	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	1.69
CY2016Q4	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.84

Files In Submission

Name	View Source	Status
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0000027904-18-000006-index.html	Edgar Link	pending
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$DAL
DELTA AIR LINES, INC. Stock $dal

2017 Form 10-K Financial Statement

#000002790418000006 Filed on February 23, 2018

Income Statement

Balance Sheet

Cashflow Statement

Facts In Submission

Files In Submission

$DAL DELTA AIR LINES, INC. Stock $dal

2017 Form 10-K Financial Statement

#000002790418000006 Filed on February 23, 2018

Income Statement

Balance Sheet

Cashflow Statement

Facts In Submission

Files In Submission

$DAL
DELTA AIR LINES, INC. Stock $dal