$DAL
DELTA AIR LINES, INC. Stock $dal

$dal Overview Financials Valuation SEC Filings Company Website

2014 Q4 Form 10-K Financial Statement

#000002790416000018 Filed on February 05, 2016

Income Statement

Concept	2014 Q4	2014 Q3	2014 Q2
Revenue	$9.647B	$11.18B	$10.62B
YoY Change	6.29%	6.56%	9.42%
Cost Of Revenue	$8.732B	$6.236B	$5.326B
YoY Change	74.15%	-17.44%	-5.83%
Gross Profit	$915.0M	$4.942B	$5.295B
YoY Change	-77.47%	68.27%	30.71%
Gross Profit Margin	9.48%	44.21%	49.85%
Selling, General & Admin	$2.709B	$2.929B	$2.826B
YoY Change	11.9%	320.83%	15.44%
% of Gross Profit	296.07%	59.27%	53.37%
Research & Development
YoY Change
% of Gross Profit
Depreciation & Amortization	$438.0M	$440.0M	$451.0M
YoY Change	4.29%	5.26%	8.67%
% of Gross Profit	47.87%	8.9%	8.52%
Operating Expenses	$3.642B	$10.34B	$9.042B
YoY Change	13.78%	15.86%	2.83%
Operating Profit	-$828.0M	$835.0M	$1.579B
YoY Change	-218.12%	-46.58%	72.76%
Interest Expense	$1.829B	$154.0M	$173.0M
YoY Change	-987.86%	-12.5%	0.58%
% of Operating Profit		18.44%	10.96%
Other Income/Expense, Net	-$170.0M	-$256.0M	-$281.0M
YoY Change	750.0%	28.0%	23.25%
Pretax Income	-$1.140B	$579.0M	$1.298B
YoY Change	-340.0%	-57.52%	89.21%
Income Tax	-$428.0M	$222.0M	$497.0M
% Of Pretax Income		38.34%	38.29%
Net Earnings	-$712.0M	$357.0M	$801.0M
YoY Change	-108.4%	-73.92%	16.93%
Net Earnings / Revenue	-7.38%	3.19%	7.54%
Basic Earnings Per Share	-$0.86	$0.43	$0.95
Diluted Earnings Per Share	-$0.86	$0.42	$0.94
COMMON SHARES
Basic Shares Outstanding		834.0M shares	841.0M shares
Diluted Shares Outstanding		843.0M shares	850.0M shares

Balance Sheet

Concept	2014 Q4	2014 Q3	2014 Q2
SHORT-TERM ASSETS
Cash & Short-Term Investments	$3.305B	$4.740B	$4.081B
YoY Change	-13.09%	6.18%	-2.39%
Cash & Equivalents	$2.088B	$2.510B	$3.362B
Short-Term Investments	$1.217B	$2.230B	$719.0M
Other Short-Term Assets	$1.779B	$3.178B	$3.371B
YoY Change	-43.93%	113.86%	102.1%
Inventory	$852.0M	$942.0M	$961.0M
Prepaid Expenses
Receivables	$2.297B	$2.135B	$2.104B
Other Receivables	$925.0M	$0.00	$0.00
Total Short-Term Assets	$9.158B	$11.00B	$10.52B
YoY Change	-5.11%	22.84%	18.23%
LONG-TERM ASSETS
Property, Plant & Equipment	$21.93B	$21.72B	$22.05B
YoY Change	0.34%	2.0%	4.75%
Goodwill	$9.794B	$9.794B	$9.794B
YoY Change	0.0%	0.0%	0.0%
Intangibles	$4.603B	$4.614B	$4.625B
YoY Change	-1.18%	-1.3%	-1.43%
Long-Term Investments
YoY Change
Other Assets	$926.0M	$1.119B	$1.105B
YoY Change	-28.93%	-12.58%	-17.66%
Total Long-Term Assets	$44.85B	$40.95B	$41.67B
YoY Change	5.64%	10.52%	13.01%
TOTAL ASSETS
Total Short-Term Assets	$9.158B	$11.00B	$10.52B
Total Long-Term Assets	$44.85B	$40.95B	$41.67B
Total Assets	$54.01B	$51.94B	$52.19B
YoY Change	3.65%	12.92%	14.02%
SHORT-TERM LIABILITIES
YoY Change
Accounts Payable	$2.622B	$2.577B	$2.536B
YoY Change	14.0%	-0.58%	-1.36%
Accrued Expenses	$4.393B	$2.775B	$2.570B
YoY Change	5.2%	28.35%	30.06%
Deferred Revenue
YoY Change
Short-Term Debt	$0.00	$0.00	$0.00
YoY Change
Long-Term Debt Due	$1.075B	$1.169B	$1.233B
YoY Change	-25.81%	-35.87%	-27.26%
Total Short-Term Liabilities	$16.85B	$14.81B	$15.21B
YoY Change	19.04%	4.8%	2.94%
LONG-TERM LIABILITIES
Long-Term Debt	$8.188B	$8.970B	$9.089B
YoY Change	-12.86%	-10.99%	-13.65%
Other Long-Term Liabilities	$2.128B	$1.946B	$1.735B
YoY Change	24.37%	13.87%	3.27%
Total Long-Term Liabilities	$28.35B	$24.83B	$24.78B
YoY Change	7.14%	-21.73%	-23.0%
TOTAL LIABILITIES
Total Short-Term Liabilities	$16.85B	$14.81B	$15.21B
Total Long-Term Liabilities	$28.35B	$24.83B	$24.78B
Total Liabilities	$45.19B	$39.64B	$39.99B
YoY Change	11.29%	-13.55%	-14.84%
SHAREHOLDERS EQUITY
Retained Earnings	$3.456B	$4.244B	$3.962B
YoY Change	13.35%	-178.9%	-158.71%
Common Stock	$12.98B	$13.46B	$13.69B
YoY Change	-7.16%	-4.48%	-3.27%
Preferred Stock
YoY Change
Treasury Stock (at cost)	$313.0M	$312.0M	$309.0M
YoY Change	21.32%	21.88%	21.18%
Treasury Stock Shares	19.79M shares	19.77M shares	19.69M shares
Shareholders Equity	$8.813B	$12.30B	$12.20B
YoY Change
Total Liabilities & Shareholders Equity	$54.01B	$51.94B	$52.19B
YoY Change	3.35%	12.92%	14.02%

Cashflow Statement

Concept	2014 Q4	2014 Q3	2014 Q2
OPERATING ACTIVITIES
Net Income	-$712.0M	$357.0M	$801.0M
YoY Change	-108.4%	-73.92%	16.93%
Depreciation, Depletion And Amortization	$438.0M	$440.0M	$451.0M
YoY Change	4.29%	5.26%	8.67%
Cash From Operating Activities	$582.0M	$1.358B	$2.056B
YoY Change	-48.54%	16.97%	70.2%
INVESTING ACTIVITIES
Capital Expenditures	-$660.0M	-$457.0M	-$518.0M
YoY Change	-30.67%	-27.58%	53.25%
Acquisitions
YoY Change
Other Investing Activities	$622.0M	-$1.126B	$239.0M
YoY Change	15450.0%	-8142.86%	-207.17%
Cash From Investing Activities	-$38.00M	-$1.583B	-$279.0M
YoY Change	-95.99%	156.56%	-50.27%
FINANCING ACTIVITIES
Cash Dividend Paid
YoY Change
Common Stock Issuance & Retirement, Net
YoY Change
Debt Paid & Issued, Net
YoY Change
Cash From Financing Activities	-966.0M	-627.0M	-1.114B
YoY Change	170.59%	27.7%	250.31%
NET CHANGE
Cash From Operating Activities	582.0M	1.358B	2.056B
Cash From Investing Activities	-38.00M	-1.583B	-279.0M
Cash From Financing Activities	-966.0M	-627.0M	-1.114B
Net Change In Cash	-422.0M	-852.0M	663.0M
YoY Change	142.53%	-1707.55%	101.52%
FREE CASH FLOW
Cash From Operating Activities	$582.0M	$1.358B	$2.056B
Capital Expenditures	-$660.0M	-$457.0M	-$518.0M
Free Cash Flow	$1.242B	$1.815B	$2.574B
YoY Change	-40.37%	1.28%	66.49%

Facts In Submission

Frame	Concept Type	Concept / XBRL Key	Value	Unit
CY2015	dal	Adjustment Skymiles Used Pursuant To Advance Purchase Agreement AdjustmentSkymilesUsedPursuantToAdvancePurchaseAgreement	0	USD
CY2013	dal	Adjustment Skymiles Used Pursuant To Advance Purchase Agreement AdjustmentSkymilesUsedPursuantToAdvancePurchaseAgreement	333000000	USD
CY2014	dal	Adjustment Skymiles Used Pursuant To Advance Purchase Agreement AdjustmentSkymilesUsedPursuantToAdvancePurchaseAgreement	0	USD
CY2015	dal	Assumed Health Care Plan Post Age AssumedHealthCarePlanPostAge	P65Y
CY2015	dal	Assumed Health Care Plan Pre Age AssumedHealthCarePlanPreAge	P65Y
CY2015Q4	dal	Available For Sale Securities Debt Maturities After Five Years Fair Value AvailableForSaleSecuritiesDebtMaturitiesAfterFiveYearsFairValue	100000000	USD
CY2015Q4	dal	Available For Sale Securities Debt Maturities After One Year Through Three Years Fair Value AvailableForSaleSecuritiesDebtMaturitiesAfterOneYearThroughThreeYearsFairValue	905000000	USD
CY2015Q4	dal	Available For Sale Securities Debt Maturities After Three Years Through Five Years Fair Value AvailableForSaleSecuritiesDebtMaturitiesAfterThreeYearsThroughFiveYearsFairValue	116000000	USD
CY2015Q4	dal	Capital Stock Shares Authorized CapitalStockSharesAuthorized	2000000000.0	shares
CY2015Q4	dal	Debt Instrument Amortization Discount Premium Net After Year Five DebtInstrumentAmortizationDiscountPremiumNetAfterYearFive	12000000	USD
CY2015Q4	dal	Debt Instrument Amortization Discount Premium Net Year Five DebtInstrumentAmortizationDiscountPremiumNetYearFive	4000000	USD
CY2015Q4	dal	Debt Instrument Amortization Discount Premium Net Year Four DebtInstrumentAmortizationDiscountPremiumNetYearFour	22000000	USD
CY2015Q4	dal	Debt Instrument Amortization Discount Premium Net Year One DebtInstrumentAmortizationDiscountPremiumNetYearOne	40000000	USD
CY2015Q4	dal	Debt Instrument Amortization Discount Premium Net Year Three DebtInstrumentAmortizationDiscountPremiumNetYearThree	35000000	USD
CY2015Q4	dal	Debt Instrument Amortization Discount Premium Net Year Two DebtInstrumentAmortizationDiscountPremiumNetYearTwo	39000000	USD
CY2015	dal	Debt Instrument Periodic Payment Percentage Of Principal DebtInstrumentPeriodicPaymentPercentageOfPrincipal	0.01	Rate
	dal	Expected Paymentsfor Proceedsfrom Derivative Instrument Financing Activities ExpectedPaymentsforProceedsfromDerivativeInstrumentFinancingActivities	-300000000	USD
CY2015	dal	Income Tax Allocation IncomeTaxAllocation	0.000
CY2013	dal	Income Tax Allocation IncomeTaxAllocation	0.127
CY2014	dal	Income Tax Allocation IncomeTaxAllocation	0.000
CY2015	dal	Income Tax Expense Remaining In Accumulated Other Comprehensive Income IncomeTaxExpenseRemainingInAccumulatedOtherComprehensiveIncome	1900000000	USD
CY2015	dal	Incometaxbenefitrelatedtotaxallocation Incometaxbenefitrelatedtotaxallocation	1900000000	USD
CY2015	dal	Incometaxexpenserelatedtotaxallocation Incometaxexpenserelatedtotaxallocation	321000000	USD
CY2015	dal	Increase Decrease In Profit Sharing IncreaseDecreaseInProfitSharing	734000000	USD
CY2013	dal	Increase Decrease In Profit Sharing IncreaseDecreaseInProfitSharing	133000000	USD
CY2014	dal	Increase Decrease In Profit Sharing IncreaseDecreaseInProfitSharing	264000000	USD
CY2015	dal	Non Cash Income Tax Expense Recorded In Other Comprehensive Income NonCashIncomeTaxExpenseRecordedInOtherComprehensiveIncome	16000000	USD
CY2013	dal	Non Cash Income Tax Expense Recorded In Other Comprehensive Income NonCashIncomeTaxExpenseRecordedInOtherComprehensiveIncome	321000000	USD
CY2014	dal	Non Cash Income Tax Expense Recorded In Other Comprehensive Income NonCashIncomeTaxExpenseRecordedInOtherComprehensiveIncome	4000000	USD
CY2015	dal	Ownership Interest Percent Threshold To Consolidate OwnershipInterestPercentThresholdToConsolidate	0.5
CY2015Q4	dal	Percentage Of Employees Represented By Unions Under Collective Bargaining Agreements PercentageOfEmployeesRepresentedByUnionsUnderCollectiveBargainingAgreements	0.18
CY2015Q4	dal	Profit Sharing Threshold ProfitSharingThreshold	2500000000.0	USD
CY2015Q4	dal	Rate Of Interest On Equity To Be Paid On Exercising Put Right RateOfInterestOnEquityToBePaidOnExercisingPutRight	0.10
CY2015	dal	Redevelopment Project Fundedby Third Parties RedevelopmentProjectFundedbyThirdParties	5000000	USD
CY2013	dal	Redevelopment Project Fundedby Third Parties RedevelopmentProjectFundedbyThirdParties	114000000	USD
CY2014	dal	Redevelopment Project Fundedby Third Parties RedevelopmentProjectFundedbyThirdParties	7000000	USD
CY2010Q4	dal	Special Project Bonds Face Amount Issued By Others SpecialProjectBondsFaceAmountIssuedByOthers	800000000	USD
CY2015	dal	Terms Of Aircraft Lease TermsOfAircraftLease	the lease would have (1) a rate equal to the aircraft-related debt payments of Shuttle America as if 90% of the aircraft was financed by Shuttle America and (2) other specified terms and conditions
CY2015	dal	Transferof Debtto Deferred Revenue TransferofDebttoDeferredRevenue	0	USD
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CY2014	dal	Transferof Debtto Deferred Revenue TransferofDebttoDeferredRevenue	0	USD
CY2015	dal	Unfunded Liability Defined Benefit Plan Interest Rate UnfundedLiabilityDefinedBenefitPlanInterestRate	0.0885	Rate
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CY2015	dal	Weighted Average Price Per Treasury Share Withheld For Taxes WeightedAveragePricePerTreasuryShareWithheldForTaxes	46.83
CY2013	dal	Weighted Average Price Per Treasury Share Withheld For Taxes WeightedAveragePricePerTreasuryShareWithheldForTaxes	14.97
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CY2015	dei	Amendment Flag AmendmentFlag	false
CY2015	dei	Current Fiscal Year End Date CurrentFiscalYearEndDate	--12-31
CY2015	dei	Document Fiscal Period Focus DocumentFiscalPeriodFocus	FY
CY2015	dei	Document Fiscal Year Focus DocumentFiscalYearFocus	2015
CY2015	dei	Document Period End Date DocumentPeriodEndDate	2015-12-31
CY2015	dei	Document Type DocumentType	10-K
CY2015	dei	Entity Central Index Key EntityCentralIndexKey	0000027904
CY2016Q1	dei	Entity Common Stock Shares Outstanding EntityCommonStockSharesOutstanding	778508621	shares
CY2015	dei	Entity Current Reporting Status EntityCurrentReportingStatus	Yes
CY2015	dei	Entity Filer Category EntityFilerCategory	Large Accelerated Filer
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CY2015Q2	dei	Entity Public Float EntityPublicFloat	32700000000	USD
CY2015	dei	Entity Registrant Name EntityRegistrantName	DELTA AIR LINES INC /DE/
CY2015	dei	Entity Voluntary Filers EntityVoluntaryFilers	No
CY2015	dei	Entity Well Known Seasoned Issuer EntityWellKnownSeasonedIssuer	Yes
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CY2015	us-gaap	Aircraft Rental AircraftRental	250000000	USD
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CY2015	us-gaap	Airline Capacity Purchase Arrangements AirlineCapacityPurchaseArrangements	4241000000	USD
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CY2015Q4	us-gaap	Airline Related Inventory Net AirlineRelatedInventoryNet	318000000	USD
CY2014Q4	us-gaap	Airline Related Inventory Valuation Reserves AirlineRelatedInventoryValuationReserves	127000000	USD
CY2015Q4	us-gaap	Airline Related Inventory Valuation Reserves AirlineRelatedInventoryValuationReserves	114000000	USD
CY2014Q4	us-gaap	Allowance For Doubtful Accounts Receivable Current AllowanceForDoubtfulAccountsReceivableCurrent	11000000	USD
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CY2015Q4	us-gaap	Capital Leases Future Minimum Payments Due In Five Years CapitalLeasesFutureMinimumPaymentsDueInFiveYears	29000000	USD
CY2015Q4	us-gaap	Capital Leases Future Minimum Payments Due In Four Years CapitalLeasesFutureMinimumPaymentsDueInFourYears	41000000	USD
CY2015Q4	us-gaap	Capital Leases Future Minimum Payments Due In Three Years CapitalLeasesFutureMinimumPaymentsDueInThreeYears	56000000	USD
CY2015Q4	us-gaap	Capital Leases Future Minimum Payments Due In Two Years CapitalLeasesFutureMinimumPaymentsDueInTwoYears	114000000	USD
CY2015Q4	us-gaap	Capital Leases Future Minimum Payments Due Thereafter CapitalLeasesFutureMinimumPaymentsDueThereafter	39000000	USD
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CY2015Q4	us-gaap	Capital Leases Future Minimum Payments Present Value Of Net Minimum Payments CapitalLeasesFutureMinimumPaymentsPresentValueOfNetMinimumPayments	383000000	USD
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CY2014Q4	us-gaap	Common Stock Value CommonStockValue	0	USD
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CY2014	us-gaap	Cost Of Services Catering CostOfServicesCatering	810000000	USD
CY2015	us-gaap	Current Federal Tax Expense Benefit CurrentFederalTaxExpenseBenefit	23000000	USD
CY2013	us-gaap	Current Federal Tax Expense Benefit CurrentFederalTaxExpenseBenefit	-24000000	USD
CY2014	us-gaap	Current Federal Tax Expense Benefit CurrentFederalTaxExpenseBenefit	-21000000	USD
CY2015	us-gaap	Current Foreign Tax Expense Benefit CurrentForeignTaxExpenseBenefit	2000000	USD
CY2013	us-gaap	Current Foreign Tax Expense Benefit CurrentForeignTaxExpenseBenefit	-1000000	USD
CY2014	us-gaap	Current Foreign Tax Expense Benefit CurrentForeignTaxExpenseBenefit	11000000	USD
CY2015	us-gaap	Current State And Local Tax Expense Benefit CurrentStateAndLocalTaxExpenseBenefit	25000000	USD
CY2013	us-gaap	Current State And Local Tax Expense Benefit CurrentStateAndLocalTaxExpenseBenefit	3000000	USD
CY2014	us-gaap	Current State And Local Tax Expense Benefit CurrentStateAndLocalTaxExpenseBenefit	9000000	USD
CY2014Q4	us-gaap	Debt Instrument Carrying Amount DebtInstrumentCarryingAmount	9469000000	USD
CY2015Q4	us-gaap	Debt Instrument Carrying Amount DebtInstrumentCarryingAmount	8098000000	USD
CY2014Q4	us-gaap	Debt Instrument Fair Value DebtInstrumentFairValue	9800000000	USD
CY2015Q4	us-gaap	Debt Instrument Fair Value DebtInstrumentFairValue	8400000000	USD
CY2014Q4	us-gaap	Debt Instrument Unamortized Discount Premium Net DebtInstrumentUnamortizedDiscountPremiumNet	206000000	USD
CY2015Q4	us-gaap	Debt Instrument Unamortized Discount Premium Net DebtInstrumentUnamortizedDiscountPremiumNet	152000000	USD
CY2014Q4	us-gaap	Debt Longterm And Shortterm Combined Amount DebtLongtermAndShorttermCombinedAmount	9263000000	USD
CY2015Q4	us-gaap	Debt Longterm And Shortterm Combined Amount DebtLongtermAndShorttermCombinedAmount	7946000000	USD
CY2015	us-gaap	Deferred Federal Income Tax Expense Benefit DeferredFederalIncomeTaxExpenseBenefit	2409000000	USD
CY2013	us-gaap	Deferred Federal Income Tax Expense Benefit DeferredFederalIncomeTaxExpenseBenefit	-7197000000	USD
CY2014	us-gaap	Deferred Federal Income Tax Expense Benefit DeferredFederalIncomeTaxExpenseBenefit	424000000	USD
CY2015	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	2581000000	USD
CY2013	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	-7991000000	USD
CY2014	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	414000000	USD
CY2014Q4	us-gaap	Deferred Income Tax Liabilities DeferredIncomeTaxLiabilities	6791000000	USD
CY2015Q4	us-gaap	Deferred Income Tax Liabilities DeferredIncomeTaxLiabilities	7500000000	USD
CY2011	us-gaap	Deferred Revenue Additions DeferredRevenueAdditions	675000000	USD
CY2012	us-gaap	Deferred Revenue Additions DeferredRevenueAdditions	675000000	USD
CY2013	us-gaap	Deferred Revenue Additions DeferredRevenueAdditions	675000000	USD
CY2014	us-gaap	Deferred Revenue Additions DeferredRevenueAdditions	675000000	USD
CY2015	us-gaap	Deferred State And Local Income Tax Expense Benefit DeferredStateAndLocalIncomeTaxExpenseBenefit	172000000	USD
CY2013	us-gaap	Deferred State And Local Income Tax Expense Benefit DeferredStateAndLocalIncomeTaxExpenseBenefit	-794000000	USD
CY2014	us-gaap	Deferred State And Local Income Tax Expense Benefit DeferredStateAndLocalIncomeTaxExpenseBenefit	-10000000	USD
CY2014Q4	us-gaap	Deferred Tax Assets Deferred Income DeferredTaxAssetsDeferredIncome	1824000000	USD
CY2015Q4	us-gaap	Deferred Tax Assets Deferred Income DeferredTaxAssetsDeferredIncome	1522000000	USD
CY2014Q4	us-gaap	Deferred Tax Assets Hedging Transactions DeferredTaxAssetsHedgingTransactions	777000000	USD
CY2015Q4	us-gaap	Deferred Tax Assets Hedging Transactions DeferredTaxAssetsHedgingTransactions	282000000	USD
CY2014Q4	us-gaap	Deferred Tax Assets Liabilities Net DeferredTaxAssetsLiabilitiesNet	7595000000	USD
CY2015Q4	us-gaap	Deferred Tax Assets Liabilities Net DeferredTaxAssetsLiabilitiesNet	4956000000	USD
CY2014Q4	us-gaap	Deferred Tax Assets Liabilities Net Noncurrent DeferredTaxAssetsLiabilitiesNetNoncurrent	7595000000	USD
CY2015Q4	us-gaap	Deferred Tax Assets Liabilities Net Noncurrent DeferredTaxAssetsLiabilitiesNetNoncurrent	4956000000	USD
CY2014Q4	us-gaap	Deferred Tax Assets Net DeferredTaxAssetsNet	14386000000	USD
CY2015Q4	us-gaap	Deferred Tax Assets Net DeferredTaxAssetsNet	12456000000	USD
CY2014Q4	us-gaap	Deferred Tax Assets Operating Loss Carryforwards DeferredTaxAssetsOperatingLossCarryforwards	4782000000	USD
CY2015Q4	us-gaap	Deferred Tax Assets Operating Loss Carryforwards DeferredTaxAssetsOperatingLossCarryforwards	3838000000	USD
CY2014Q4	us-gaap	Deferred Tax Assets Other DeferredTaxAssetsOther	659000000	USD
CY2015Q4	us-gaap	Deferred Tax Assets Other DeferredTaxAssetsOther	1047000000	USD
CY2014Q4	us-gaap	Deferred Tax Assets Tax Credit Carryforwards Alternative Minimum Tax DeferredTaxAssetsTaxCreditCarryforwardsAlternativeMinimumTax	357000000	USD
CY2015Q4	us-gaap	Deferred Tax Assets Tax Credit Carryforwards Alternative Minimum Tax DeferredTaxAssetsTaxCreditCarryforwardsAlternativeMinimumTax	379000000	USD
CY2014Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Compensation And Benefits DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefits	6033000000	USD
CY2015Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Compensation And Benefits DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefits	5444000000	USD
CY2012Q4	us-gaap	Deferred Tax Assets Valuation Allowance DeferredTaxAssetsValuationAllowance	10963000000	USD
CY2013Q4	us-gaap	Deferred Tax Assets Valuation Allowance DeferredTaxAssetsValuationAllowance	177000000	USD
CY2014Q4	us-gaap	Deferred Tax Assets Valuation Allowance DeferredTaxAssetsValuationAllowance	46000000	USD
CY2015Q4	us-gaap	Deferred Tax Assets Valuation Allowance DeferredTaxAssetsValuationAllowance	56000000	USD
CY2014Q4	us-gaap	Deferred Tax Liabilities Goodwill And Intangible Assets Intangible Assets DeferredTaxLiabilitiesGoodwillAndIntangibleAssetsIntangibleAssets	1684000000	USD
CY2015Q4	us-gaap	Deferred Tax Liabilities Goodwill And Intangible Assets Intangible Assets DeferredTaxLiabilitiesGoodwillAndIntangibleAssetsIntangibleAssets	1681000000	USD
CY2014Q4	us-gaap	Deferred Tax Liabilities Other DeferredTaxLiabilitiesOther	444000000	USD
CY2015Q4	us-gaap	Deferred Tax Liabilities Other DeferredTaxLiabilitiesOther	329000000	USD
CY2014Q4	us-gaap	Deferred Tax Liabilities Property Plant And Equipment DeferredTaxLiabilitiesPropertyPlantAndEquipment	4663000000	USD
CY2015Q4	us-gaap	Deferred Tax Liabilities Property Plant And Equipment DeferredTaxLiabilitiesPropertyPlantAndEquipment	5490000000	USD
CY2015	us-gaap	Defined Benefit Plan Actuarial Gain Loss DefinedBenefitPlanActuarialGainLoss	1100000000	USD
CY2014	us-gaap	Defined Benefit Plan Actuarial Gain Loss DefinedBenefitPlanActuarialGainLoss	-3300000000	USD
CY2015	us-gaap	Defined Benefit Plan Amount To Be Amortized From Accumulated Other Comprehensive Income Loss Next Fiscal Year DefinedBenefitPlanAmountToBeAmortizedFromAccumulatedOtherComprehensiveIncomeLossNextFiscalYear	-231000000	USD
CY2014Q4	us-gaap	Defined Benefit Plan Assumptions Used Calculating Benefit Obligation Discount Rate DefinedBenefitPlanAssumptionsUsedCalculatingBenefitObligationDiscountRate	0.0414
CY2015Q4	us-gaap	Defined Benefit Plan Assumptions Used Calculating Benefit Obligation Discount Rate DefinedBenefitPlanAssumptionsUsedCalculatingBenefitObligationDiscountRate	0.0457
CY2015	us-gaap	Defined Benefit Plan Assumptions Used Calculating Net Periodic Benefit Cost Expected Long Term Return On Assets DefinedBenefitPlanAssumptionsUsedCalculatingNetPeriodicBenefitCostExpectedLongTermReturnOnAssets	0.09	Rate
CY2015	us-gaap	Defined Benefit Plan Description Of Direction And Pattern Of Change For Assumed Health Care Cost Trend Rate DefinedBenefitPlanDescriptionOfDirectionAndPatternOfChangeForAssumedHealthCareCostTrendRate	0.05
CY2014Q4	us-gaap	Defined Benefit Plan Fair Value Of Plan Assets DefinedBenefitPlanFairValueOfPlanAssets	10351000000	USD
CY2015Q4	us-gaap	Defined Benefit Plan Fair Value Of Plan Assets DefinedBenefitPlanFairValueOfPlanAssets	10030000000	USD
CY2015	us-gaap	Defined Benefit Plan Health Care Cost Trend Rate Assumed For Next Fiscal Year DefinedBenefitPlanHealthCareCostTrendRateAssumedForNextFiscalYear	0.0700
CY2013	us-gaap	Defined Benefit Plan Health Care Cost Trend Rate Assumed For Next Fiscal Year DefinedBenefitPlanHealthCareCostTrendRateAssumedForNextFiscalYear	0.0700
CY2014	us-gaap	Defined Benefit Plan Health Care Cost Trend Rate Assumed For Next Fiscal Year DefinedBenefitPlanHealthCareCostTrendRateAssumedForNextFiscalYear	0.0700
CY2015	us-gaap	Defined Benefit Plan Ultimate Health Care Cost Trend Rate DefinedBenefitPlanUltimateHealthCareCostTrendRate	0.01
CY2015	us-gaap	Depreciation And Amortization DepreciationAndAmortization	1835000000	USD
CY2013	us-gaap	Depreciation And Amortization DepreciationAndAmortization	1658000000	USD
CY2014	us-gaap	Depreciation And Amortization DepreciationAndAmortization	1771000000	USD
CY2015	us-gaap	Depreciation Depletion And Amortization DepreciationDepletionAndAmortization	1835000000	USD
CY2013	us-gaap	Depreciation Depletion And Amortization DepreciationDepletionAndAmortization	1658000000	USD
CY2014	us-gaap	Depreciation Depletion And Amortization DepreciationDepletionAndAmortization	1771000000	USD
CY2015	us-gaap	Depreciation Nonproduction DepreciationNonproduction	1800000000	USD
CY2013	us-gaap	Depreciation Nonproduction DepreciationNonproduction	1600000000	USD
CY2014	us-gaap	Depreciation Nonproduction DepreciationNonproduction	1700000000	USD
CY2014Q4	us-gaap	Derivative Assets Current DerivativeAssetsCurrent	1078000000	USD
CY2015Q4	us-gaap	Derivative Assets Current DerivativeAssetsCurrent	1987000000	USD
CY2014Q4	us-gaap	Derivative Collateral Right To Reclaim Cash DerivativeCollateralRightToReclaimCash	925000000	USD
CY2015Q4	us-gaap	Derivative Collateral Right To Reclaim Cash DerivativeCollateralRightToReclaimCash	119000000	USD
CY2014Q4	us-gaap	Derivative Fair Value Of Derivative Net DerivativeFairValueOfDerivativeNet	-1782000000	USD
CY2015Q4	us-gaap	Derivative Fair Value Of Derivative Net DerivativeFairValueOfDerivativeNet	-581000000	USD
CY2015	us-gaap	Derivative Gain Loss On Derivative Net DerivativeGainLossOnDerivativeNet	1366000000	USD
CY2013	us-gaap	Derivative Gain Loss On Derivative Net DerivativeGainLossOnDerivativeNet	86000000	USD
CY2014	us-gaap	Derivative Gain Loss On Derivative Net DerivativeGainLossOnDerivativeNet	-2186000000	USD
CY2015	us-gaap	Derivative Instruments Gain Loss Reclassified From Accumulated Oci Into Income Effective Portion Net DerivativeInstrumentsGainLossReclassifiedFromAccumulatedOCIIntoIncomeEffectivePortionNet	198000000	USD
CY2013	us-gaap	Derivative Instruments Gain Loss Reclassified From Accumulated Oci Into Income Effective Portion Net DerivativeInstrumentsGainLossReclassifiedFromAccumulatedOCIIntoIncomeEffectivePortionNet	135000000	USD
CY2014	us-gaap	Derivative Instruments Gain Loss Reclassified From Accumulated Oci Into Income Effective Portion Net DerivativeInstrumentsGainLossReclassifiedFromAccumulatedOCIIntoIncomeEffectivePortionNet	127000000	USD
CY2015	us-gaap	Derivative Instruments Gain Loss Recognized In Other Comprehensive Income Effective Portion Net DerivativeInstrumentsGainLossRecognizedInOtherComprehensiveIncomeEffectivePortionNet	-130000000	USD
CY2013	us-gaap	Derivative Instruments Gain Loss Recognized In Other Comprehensive Income Effective Portion Net DerivativeInstrumentsGainLossRecognizedInOtherComprehensiveIncomeEffectivePortionNet	161000000	USD
CY2014	us-gaap	Derivative Instruments Gain Loss Recognized In Other Comprehensive Income Effective Portion Net DerivativeInstrumentsGainLossRecognizedInOtherComprehensiveIncomeEffectivePortionNet	4000000	USD
CY2014Q4	us-gaap	Derivative Liabilities Current DerivativeLiabilitiesCurrent	2772000000	USD
CY2015Q4	us-gaap	Derivative Liabilities Current DerivativeLiabilitiesCurrent	2581000000	USD
CY2015	us-gaap	Dividends Dividends	359000000	USD
CY2013	us-gaap	Dividends Dividends	102000000	USD
CY2014	us-gaap	Dividends Dividends	252000000	USD
CY2015	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	5.68
CY2013	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	12.41
CY2014Q1	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.25
CY2014Q2	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.95
CY2014Q3	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.43
CY2014Q4	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	-0.86
CY2014	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.79
CY2015Q1	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.91
CY2015Q2	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	1.85
CY2015Q3	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	1.67
CY2015Q4	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	1.26
CY2015	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	5.63
CY2013	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	12.29
CY2014Q1	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.25
CY2014Q2	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.94
CY2014Q3	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.42
CY2014Q4	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	-0.86
CY2014	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.78
CY2015Q1	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.90
CY2015Q2	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	1.83
CY2015Q3	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	1.65
CY2015Q4	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	1.25
CY2015	us-gaap	Effective Income Tax Rate Continuing Operations EffectiveIncomeTaxRateContinuingOperations	0.368
CY2013	us-gaap	Effective Income Tax Rate Continuing Operations EffectiveIncomeTaxRateContinuingOperations	-3.172
CY2014	us-gaap	Effective Income Tax Rate Continuing Operations EffectiveIncomeTaxRateContinuingOperations	0.385
CY2015	us-gaap	Effective Income Tax Rate Reconciliation At Federal Statutory Income Tax Rate EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate	0.350
CY2013	us-gaap	Effective Income Tax Rate Reconciliation At Federal Statutory Income Tax Rate EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate	0.350
CY2014	us-gaap	Effective Income Tax Rate Reconciliation At Federal Statutory Income Tax Rate EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate	0.350
CY2015	us-gaap	Effective Income Tax Rate Reconciliation Change In Deferred Tax Assets Valuation Allowance EffectiveIncomeTaxRateReconciliationChangeInDeferredTaxAssetsValuationAllowance	-0.002
CY2013	us-gaap	Effective Income Tax Rate Reconciliation Change In Deferred Tax Assets Valuation Allowance EffectiveIncomeTaxRateReconciliationChangeInDeferredTaxAssetsValuationAllowance	-3.675
CY2014	us-gaap	Effective Income Tax Rate Reconciliation Change In Deferred Tax Assets Valuation Allowance EffectiveIncomeTaxRateReconciliationChangeInDeferredTaxAssetsValuationAllowance	-0.024
CY2015	us-gaap	Effective Income Tax Rate Reconciliation Other Adjustments EffectiveIncomeTaxRateReconciliationOtherAdjustments	0.002
CY2013	us-gaap	Effective Income Tax Rate Reconciliation Other Adjustments EffectiveIncomeTaxRateReconciliationOtherAdjustments	-0.004
CY2014	us-gaap	Effective Income Tax Rate Reconciliation Other Adjustments EffectiveIncomeTaxRateReconciliationOtherAdjustments	0.039
CY2015	us-gaap	Effective Income Tax Rate Reconciliation State And Local Income Taxes EffectiveIncomeTaxRateReconciliationStateAndLocalIncomeTaxes	0.018
CY2013	us-gaap	Effective Income Tax Rate Reconciliation State And Local Income Taxes EffectiveIncomeTaxRateReconciliationStateAndLocalIncomeTaxes	0.030
CY2014	us-gaap	Effective Income Tax Rate Reconciliation State And Local Income Taxes EffectiveIncomeTaxRateReconciliationStateAndLocalIncomeTaxes	0.020
CY2014Q4	us-gaap	Employee Related Liabilities Current EmployeeRelatedLiabilitiesCurrent	2266000000	USD
CY2015Q4	us-gaap	Employee Related Liabilities Current EmployeeRelatedLiabilitiesCurrent	3195000000	USD
CY2015Q4	us-gaap	Employee Service Share Based Compensation Nonvested Awards Total Compensation Cost Not Yet Recognized EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized	61000000	USD
CY2015	us-gaap	Employee Service Share Based Compensation Tax Benefit From Compensation Expense EmployeeServiceShareBasedCompensationTaxBenefitFromCompensationExpense	0	USD
CY2013	us-gaap	Employee Service Share Based Compensation Tax Benefit From Compensation Expense EmployeeServiceShareBasedCompensationTaxBenefitFromCompensationExpense	0	USD
CY2014	us-gaap	Employee Service Share Based Compensation Tax Benefit From Compensation Expense EmployeeServiceShareBasedCompensationTaxBenefitFromCompensationExpense	0	USD
CY2015	us-gaap	Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Asset Purchases Sales Issuances Settlements FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetPurchasesSalesIssuancesSettlements	474000000	USD
CY2014	us-gaap	Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Asset Purchases Sales Issuances Settlements FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetPurchasesSalesIssuancesSettlements	1764000000	USD
CY2013Q4	us-gaap	Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Asset Value FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetValue	2665000000	USD
CY2014Q4	us-gaap	Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Asset Value FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetValue	4598000000	USD
CY2015Q4	us-gaap	Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Asset Value FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetValue	5194000000	USD
CY2014Q4	us-gaap	Finite Lived Intangible Assets Accumulated Amortization FiniteLivedIntangibleAssetsAccumulatedAmortization	793000000	USD
CY2015Q4	us-gaap	Finite Lived Intangible Assets Accumulated Amortization FiniteLivedIntangibleAssetsAccumulatedAmortization	811000000	USD
CY2014Q4	us-gaap	Finite Lived Intangible Assets Gross FiniteLivedIntangibleAssetsGross	976000000	USD
CY2015Q4	us-gaap	Finite Lived Intangible Assets Gross FiniteLivedIntangibleAssetsGross	976000000	USD
CY2014Q4	us-gaap	Foreign Currency Cash Flow Hedge Derivative At Fair Value Net ForeignCurrencyCashFlowHedgeDerivativeAtFairValueNet	73000000	USD
CY2015Q4	us-gaap	Foreign Currency Cash Flow Hedge Derivative At Fair Value Net ForeignCurrencyCashFlowHedgeDerivativeAtFairValueNet	94000000	USD
CY2014Q4	us-gaap	Frequent Flier Liability Current FrequentFlierLiabilityCurrent	1580000000	USD
CY2015Q4	us-gaap	Frequent Flier Liability Current FrequentFlierLiabilityCurrent	1635000000	USD
CY2014Q4	us-gaap	Frequent Flier Liability Noncurrent FrequentFlierLiabilityNoncurrent	2602000000	USD
CY2015Q4	us-gaap	Frequent Flier Liability Noncurrent FrequentFlierLiabilityNoncurrent	2246000000	USD
CY2015	us-gaap	Fuel Costs FuelCosts	6544000000	USD
CY2013	us-gaap	Fuel Costs FuelCosts	9397000000	USD
CY2014	us-gaap	Fuel Costs FuelCosts	11668000000	USD
CY2015	us-gaap	Gain Loss On Investments GainLossOnInvestments	-45000000	USD
CY2013	us-gaap	Gain Loss On Investments GainLossOnInvestments	-19000000	USD
CY2014	us-gaap	Gain Loss On Investments GainLossOnInvestments	10000000	USD
CY2015	us-gaap	Gains Losses On Extinguishment Of Debt GainsLossesOnExtinguishmentOfDebt	-22000000	USD
CY2013	us-gaap	Gains Losses On Extinguishment Of Debt GainsLossesOnExtinguishmentOfDebt	0	USD
CY2014	us-gaap	Gains Losses On Extinguishment Of Debt GainsLossesOnExtinguishmentOfDebt	-268000000	USD
CY2014Q4	us-gaap	Goodwill Goodwill	9794000000	USD
CY2015Q4	us-gaap	Goodwill Goodwill	9794000000	USD
CY2012Q2	us-gaap	Grants Receivable GrantsReceivable	30000000	USD
CY2014	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	1072000000	USD
CY2015	us-gaap	Income Loss From Equity Method Investments IncomeLossFromEquityMethodInvestments	35000000	USD
CY2013	us-gaap	Income Loss From Equity Method Investments IncomeLossFromEquityMethodInvestments	24000000	USD
CY2015	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	7157000000	USD
CY2013	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	2527000000	USD
CY2014	us-gaap	Income Loss From Equity Method Investments IncomeLossFromEquityMethodInvestments	-106000000	USD
CY2015	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	2631000000	USD
CY2013	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	-8013000000	USD
CY2014	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	413000000	USD
CY2015	us-gaap	Increase Decrease In Accounts Payable And Accrued Liabilities IncreaseDecreaseInAccountsPayableAndAccruedLiabilities	-201000000	USD
CY2013	us-gaap	Increase Decrease In Accounts Payable And Accrued Liabilities IncreaseDecreaseInAccountsPayableAndAccruedLiabilities	80000000	USD
CY2014	us-gaap	Increase Decrease In Accounts Payable And Accrued Liabilities IncreaseDecreaseInAccountsPayableAndAccruedLiabilities	-36000000	USD
CY2015	us-gaap	Increase Decrease In Air Traffic Liability1 IncreaseDecreaseInAirTrafficLiability1	207000000	USD
CY2013	us-gaap	Increase Decrease In Air Traffic Liability1 IncreaseDecreaseInAirTrafficLiability1	426000000	USD
CY2014	us-gaap	Increase Decrease In Air Traffic Liability1 IncreaseDecreaseInAirTrafficLiability1	174000000	USD
CY2015	us-gaap	Increase Decrease In Frequent Flyer Liability IncreaseDecreaseInFrequentFlyerLiability	-301000000	USD
CY2013	us-gaap	Increase Decrease In Frequent Flyer Liability IncreaseDecreaseInFrequentFlyerLiability	-121000000	USD
CY2014	us-gaap	Increase Decrease In Frequent Flyer Liability IncreaseDecreaseInFrequentFlyerLiability	-238000000	USD
CY2015	us-gaap	Increase Decrease In Inventories IncreaseDecreaseInInventories	-155000000	USD
CY2013	us-gaap	Increase Decrease In Inventories IncreaseDecreaseInInventories	87000000	USD
CY2014	us-gaap	Increase Decrease In Inventories IncreaseDecreaseInInventories	-172000000	USD
CY2015	us-gaap	Increase Decrease In Margin Deposits Outstanding IncreaseDecreaseInMarginDepositsOutstanding	-806000000	USD
CY2013	us-gaap	Increase Decrease In Margin Deposits Outstanding IncreaseDecreaseInMarginDepositsOutstanding	-14000000	USD
CY2014	us-gaap	Increase Decrease In Margin Deposits Outstanding IncreaseDecreaseInMarginDepositsOutstanding	922000000	USD
CY2015	us-gaap	Increase Decrease In Prepaid Deferred Expense And Other Assets IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets	102000000	USD
CY2013	us-gaap	Increase Decrease In Prepaid Deferred Expense And Other Assets IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets	-28000000	USD
CY2014	us-gaap	Increase Decrease In Prepaid Deferred Expense And Other Assets IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets	-58000000	USD
CY2015	us-gaap	Increase Decrease In Receivables IncreaseDecreaseInReceivables	56000000	USD
CY2013	us-gaap	Increase Decrease In Receivables IncreaseDecreaseInReceivables	-90000000	USD
CY2014	us-gaap	Increase Decrease In Receivables IncreaseDecreaseInReceivables	302000000	USD
CY2015	us-gaap	Increase Decrease In Restricted Cash And Investments For Operating Activities IncreaseDecreaseInRestrictedCashAndInvestmentsForOperatingActivities	-7000000	USD
CY2013	us-gaap	Increase Decrease In Restricted Cash And Investments For Operating Activities IncreaseDecreaseInRestrictedCashAndInvestmentsForOperatingActivities	-231000000	USD
CY2014	us-gaap	Increase Decrease In Restricted Cash And Investments For Operating Activities IncreaseDecreaseInRestrictedCashAndInvestmentsForOperatingActivities	-62000000	USD
CY2015	us-gaap	Incremental Common Shares Attributable To Share Based Payment Arrangements IncrementalCommonSharesAttributableToShareBasedPaymentArrangements	7000000	shares
CY2013	us-gaap	Incremental Common Shares Attributable To Share Based Payment Arrangements IncrementalCommonSharesAttributableToShareBasedPaymentArrangements	9000000	shares
CY2014	us-gaap	Incremental Common Shares Attributable To Share Based Payment Arrangements IncrementalCommonSharesAttributableToShareBasedPaymentArrangements	9000000	shares
CY2014Q4	us-gaap	Indefinite Lived Intangible Assets Excluding Goodwill IndefiniteLivedIntangibleAssetsExcludingGoodwill	4420000000	USD
CY2015Q4	us-gaap	Indefinite Lived Intangible Assets Excluding Goodwill IndefiniteLivedIntangibleAssetsExcludingGoodwill	4696000000	USD
CY2014Q4	us-gaap	Intangible Assets Net Excluding Goodwill IntangibleAssetsNetExcludingGoodwill	4603000000	USD
CY2015Q4	us-gaap	Intangible Assets Net Excluding Goodwill IntangibleAssetsNetExcludingGoodwill	4861000000	USD
CY2015	us-gaap	Interest Expense InterestExpense	481000000	USD
CY2013	us-gaap	Interest Expense InterestExpense	852000000	USD
CY2014	us-gaap	Interest Expense InterestExpense	650000000	USD
CY2015	us-gaap	Interest Income Expense Net InterestIncomeExpenseNet	-481000000	USD
CY2013	us-gaap	Interest Income Expense Net InterestIncomeExpenseNet	-852000000	USD
CY2014	us-gaap	Interest Income Expense Net InterestIncomeExpenseNet	-650000000	USD
CY2015	us-gaap	Interest Paid InterestPaid	452000000	USD
CY2013	us-gaap	Interest Paid InterestPaid	698000000	USD
CY2014	us-gaap	Interest Paid InterestPaid	560000000	USD
CY2014Q4	us-gaap	Interest Rate Derivatives At Fair Value Net InterestRateDerivativesAtFairValueNet	-7000000	USD
CY2015Q4	us-gaap	Interest Rate Derivatives At Fair Value Net InterestRateDerivativesAtFairValueNet	-3000000	USD
CY2014Q4	us-gaap	Inventory Finished Goods InventoryFinishedGoods	534000000	USD
CY2015Q4	us-gaap	Inventory Finished Goods InventoryFinishedGoods	379000000	USD
CY2015	us-gaap	Labor And Related Expense LaborAndRelatedExpense	8776000000	USD
CY2013	us-gaap	Labor And Related Expense LaborAndRelatedExpense	7720000000	USD
CY2014	us-gaap	Labor And Related Expense LaborAndRelatedExpense	8120000000	USD
CY2015	us-gaap	Landing Fees And Other Rentals LandingFeesAndOtherRentals	1493000000	USD
CY2013	us-gaap	Landing Fees And Other Rentals LandingFeesAndOtherRentals	1410000000	USD
CY2014	us-gaap	Landing Fees And Other Rentals LandingFeesAndOtherRentals	1442000000	USD
CY2015	us-gaap	Lease And Rental Expense LeaseAndRentalExpense	1200000000	USD
CY2013	us-gaap	Lease And Rental Expense LeaseAndRentalExpense	1100000000	USD
CY2014	us-gaap	Lease And Rental Expense LeaseAndRentalExpense	1200000000	USD
CY2014Q4	us-gaap	Liabilities And Stockholders Equity LiabilitiesAndStockholdersEquity	54005000000	USD
CY2015Q4	us-gaap	Liabilities And Stockholders Equity LiabilitiesAndStockholdersEquity	53134000000	USD
CY2014Q4	us-gaap	Liabilities Current LiabilitiesCurrent	16847000000	USD
CY2015Q4	us-gaap	Liabilities Current LiabilitiesCurrent	17526000000	USD
CY2014Q4	us-gaap	Liabilities Noncurrent LiabilitiesNoncurrent	28345000000	USD
CY2015Q4	us-gaap	Liabilities Noncurrent LiabilitiesNoncurrent	24758000000	USD
CY2015Q4	us-gaap	Line Of Credit Facility Current Borrowing Capacity LineOfCreditFacilityCurrentBorrowingCapacity	2207000000	USD
CY2014Q4	us-gaap	Long Term Debt LongTermDebt	9263000000	USD
CY2015Q4	us-gaap	Long Term Debt LongTermDebt	7946000000	USD
CY2014Q4	us-gaap	Long Term Debt And Capital Lease Obligations LongTermDebtAndCapitalLeaseObligations	8477000000	USD
CY2015Q4	us-gaap	Long Term Debt And Capital Lease Obligations LongTermDebtAndCapitalLeaseObligations	6766000000	USD
CY2014Q4	us-gaap	Long Term Debt And Capital Lease Obligations Current LongTermDebtAndCapitalLeaseObligationsCurrent	1184000000	USD
CY2015Q4	us-gaap	Long Term Debt And Capital Lease Obligations Current LongTermDebtAndCapitalLeaseObligationsCurrent	1563000000	USD
CY2014Q4	us-gaap	Long Term Debt Current LongTermDebtCurrent	1075000000	USD
CY2015Q4	us-gaap	Long Term Debt Current LongTermDebtCurrent	1415000000	USD
CY2015Q4	us-gaap	Long Term Debt Maturities Repayments Of Principal After Year Five LongTermDebtMaturitiesRepaymentsOfPrincipalAfterYearFive	2081000000	USD
CY2015Q4	us-gaap	Long Term Debt Maturities Repayments Of Principal In Next Twelve Months LongTermDebtMaturitiesRepaymentsOfPrincipalInNextTwelveMonths	1442000000	USD
CY2015Q4	us-gaap	Long Term Debt Maturities Repayments Of Principal In Year Five LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFive	456000000	USD
CY2015Q4	us-gaap	Long Term Debt Maturities Repayments Of Principal In Year Four LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFour	1189000000	USD
CY2015Q4	us-gaap	Long Term Debt Maturities Repayments Of Principal In Year Three LongTermDebtMaturitiesRepaymentsOfPrincipalInYearThree	2061000000	USD
CY2015Q4	us-gaap	Long Term Debt Maturities Repayments Of Principal In Year Two LongTermDebtMaturitiesRepaymentsOfPrincipalInYearTwo	869000000	USD
CY2014Q4	us-gaap	Long Term Debt Noncurrent LongTermDebtNoncurrent	8188000000	USD
CY2015Q4	us-gaap	Long Term Debt Noncurrent LongTermDebtNoncurrent	6531000000	USD
CY2015	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	-4088000000	USD
CY2013	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	-1320000000	USD
CY2014	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	-3240000000	USD
CY2015	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-3955000000	USD
CY2013	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-2756000000	USD
CY2014	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-2463000000	USD
CY2015	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	7927000000	USD
CY2013	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	4504000000	USD
CY2014	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	4947000000	USD
CY2015	us-gaap	Net Income Loss NetIncomeLoss	4526000000	USD
CY2013	us-gaap	Net Income Loss NetIncomeLoss	10540000000	USD
CY2014Q1	us-gaap	Net Income Loss NetIncomeLoss	213000000	USD
CY2014Q2	us-gaap	Net Income Loss NetIncomeLoss	801000000	USD
CY2014Q3	us-gaap	Net Income Loss NetIncomeLoss	357000000	USD
CY2014Q4	us-gaap	Net Income Loss NetIncomeLoss	-712000000	USD
CY2014	us-gaap	Net Income Loss NetIncomeLoss	659000000	USD
CY2015Q1	us-gaap	Net Income Loss NetIncomeLoss	746000000	USD
CY2015Q2	us-gaap	Net Income Loss NetIncomeLoss	1485000000	USD
CY2015Q3	us-gaap	Net Income Loss NetIncomeLoss	1315000000	USD
CY2015Q4	us-gaap	Net Income Loss NetIncomeLoss	980000000	USD
CY2015	us-gaap	Nonoperating Income Expense NonoperatingIncomeExpense	-645000000	USD
CY2013	us-gaap	Nonoperating Income Expense NonoperatingIncomeExpense	-873000000	USD
CY2014	us-gaap	Nonoperating Income Expense NonoperatingIncomeExpense	-1134000000	USD
CY2015	us-gaap	Number Of Operating Segments NumberOfOperatingSegments	2	Segments
CY2015	us-gaap	Operating Expenses OperatingExpenses	32902000000	USD
CY2013	us-gaap	Operating Expenses OperatingExpenses	34373000000	USD
CY2014	us-gaap	Operating Expenses OperatingExpenses	38156000000	USD
CY2015	us-gaap	Operating Income Loss OperatingIncomeLoss	7802000000	USD
CY2013	us-gaap	Operating Income Loss OperatingIncomeLoss	3400000000	USD
CY2014Q1	us-gaap	Operating Income Loss OperatingIncomeLoss	620000000	USD
CY2014Q2	us-gaap	Operating Income Loss OperatingIncomeLoss	1579000000	USD
CY2014Q3	us-gaap	Operating Income Loss OperatingIncomeLoss	835000000	USD
CY2014Q4	us-gaap	Operating Income Loss OperatingIncomeLoss	-828000000	USD
CY2014	us-gaap	Operating Income Loss OperatingIncomeLoss	2206000000	USD
CY2015Q1	us-gaap	Operating Income Loss OperatingIncomeLoss	1398000000	USD
CY2015Q2	us-gaap	Operating Income Loss OperatingIncomeLoss	2474000000	USD
CY2015Q3	us-gaap	Operating Income Loss OperatingIncomeLoss	2213000000	USD
CY2015Q4	us-gaap	Operating Income Loss OperatingIncomeLoss	1717000000	USD
CY2015Q4	us-gaap	Operating Leases Future Minimum Payments Due OperatingLeasesFutureMinimumPaymentsDue	12761000000	USD
CY2015Q4	us-gaap	Operating Leases Future Minimum Payments Due Current OperatingLeasesFutureMinimumPaymentsDueCurrent	1583000000	USD
CY2015Q4	us-gaap	Operating Leases Future Minimum Payments Due In Five Years OperatingLeasesFutureMinimumPaymentsDueInFiveYears	1053000000	USD
CY2015Q4	us-gaap	Operating Leases Future Minimum Payments Due In Four Years OperatingLeasesFutureMinimumPaymentsDueInFourYears	1158000000	USD
CY2015Q4	us-gaap	Operating Leases Future Minimum Payments Due In Three Years OperatingLeasesFutureMinimumPaymentsDueInThreeYears	1307000000	USD
CY2015Q4	us-gaap	Operating Leases Future Minimum Payments Due In Two Years OperatingLeasesFutureMinimumPaymentsDueInTwoYears	1440000000	USD
CY2015Q4	us-gaap	Operating Leases Future Minimum Payments Due Thereafter OperatingLeasesFutureMinimumPaymentsDueThereafter	6220000000	USD
CY2015Q4	us-gaap	Operating Loss Carryforwards OperatingLossCarryforwards	9500000000	USD
CY2015	us-gaap	Operating Loss Carryforwards Expiration Date OperatingLossCarryforwardsExpirationDate	2024-01-01
CY2014Q4	us-gaap	Other Accrued Liabilities Current OtherAccruedLiabilitiesCurrent	2127000000	USD
CY2015Q4	us-gaap	Other Accrued Liabilities Current OtherAccruedLiabilitiesCurrent	1306000000	USD
CY2014Q4	us-gaap	Other Assets OtherAssets	22918000000	USD
CY2015Q4	us-gaap	Other Assets OtherAssets	21039000000	USD
CY2014Q4	us-gaap	Other Assets Fair Value Disclosure OtherAssetsFairValueDisclosure	37000000	USD
CY2015Q4	us-gaap	Other Assets Fair Value Disclosure OtherAssetsFairValueDisclosure	49000000	USD
CY2014Q4	us-gaap	Other Assets Noncurrent OtherAssetsNoncurrent	926000000	USD
CY2015Q4	us-gaap	Other Assets Noncurrent OtherAssetsNoncurrent	1428000000	USD
CY2015	us-gaap	Other Comprehensive Income Loss Before Reclassifications Net Of Tax OtherComprehensiveIncomeLossBeforeReclassificationsNetOfTax	8000000	USD
CY2013	us-gaap	Other Comprehensive Income Loss Before Reclassifications Net Of Tax OtherComprehensiveIncomeLossBeforeReclassificationsNetOfTax	3037000000	USD
CY2014	us-gaap	Other Comprehensive Income Loss Before Reclassifications Net Of Tax OtherComprehensiveIncomeLossBeforeReclassificationsNetOfTax	-2174000000	USD
CY2015	us-gaap	Other Comprehensive Income Loss Derivatives Qualifying As Hedges Net Of Tax OtherComprehensiveIncomeLossDerivativesQualifyingAsHedgesNetOfTax	-82000000	USD
CY2013	us-gaap	Other Comprehensive Income Loss Derivatives Qualifying As Hedges Net Of Tax OtherComprehensiveIncomeLossDerivativesQualifyingAsHedgesNetOfTax	482000000	USD
CY2014	us-gaap	Other Comprehensive Income Loss Derivatives Qualifying As Hedges Net Of Tax OtherComprehensiveIncomeLossDerivativesQualifyingAsHedgesNetOfTax	3000000	USD
CY2015	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	36000000	USD
CY2013	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	3447000000	USD
CY2014	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	-2181000000	USD
CY2015	us-gaap	Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Adjustment Net Of Tax OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentNetOfTax	-163000000	USD
CY2013	us-gaap	Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Adjustment Net Of Tax OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentNetOfTax	-2984000000	USD
CY2014	us-gaap	Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Adjustment Net Of Tax OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentNetOfTax	2194000000	USD
CY2015	us-gaap	Other Comprehensive Income Loss Tax OtherComprehensiveIncomeLossTax	41000000	USD
CY2013	us-gaap	Other Comprehensive Income Loss Tax OtherComprehensiveIncomeLossTax	0	USD
CY2014	us-gaap	Other Comprehensive Income Loss Tax OtherComprehensiveIncomeLossTax	1276000000	USD
CY2015	us-gaap	Other Cost And Expense Operating OtherCostAndExpenseOperating	1998000000	USD
CY2013	us-gaap	Other Cost And Expense Operating OtherCostAndExpenseOperating	1520000000	USD
CY2014	us-gaap	Other Cost And Expense Operating OtherCostAndExpenseOperating	1797000000	USD
CY2015	us-gaap	Other Labor Related Expenses OtherLaborRelatedExpenses	1490000000	USD
CY2013	us-gaap	Other Labor Related Expenses OtherLaborRelatedExpenses	506000000	USD
CY2014	us-gaap	Other Labor Related Expenses OtherLaborRelatedExpenses	1085000000	USD
CY2014Q4	us-gaap	Other Liabilities Noncurrent OtherLiabilitiesNoncurrent	2128000000	USD
CY2015Q4	us-gaap	Other Liabilities Noncurrent OtherLiabilitiesNoncurrent	1891000000	USD
CY2015	us-gaap	Other Nonoperating Income Expense OtherNonoperatingIncomeExpense	-164000000	USD
CY2013	us-gaap	Other Nonoperating Income Expense OtherNonoperatingIncomeExpense	-21000000	USD
CY2014	us-gaap	Other Nonoperating Income Expense OtherNonoperatingIncomeExpense	-484000000	USD
CY2015	us-gaap	Other Operating Activities Cash Flow Statement OtherOperatingActivitiesCashFlowStatement	93000000	USD
CY2013	us-gaap	Other Operating Activities Cash Flow Statement OtherOperatingActivitiesCashFlowStatement	285000000	USD
CY2014	us-gaap	Other Operating Activities Cash Flow Statement OtherOperatingActivitiesCashFlowStatement	276000000	USD
CY2015	us-gaap	Other Sales Revenue Net OtherSalesRevenueNet	5109000000	USD
CY2013	us-gaap	Other Sales Revenue Net OtherSalesRevenueNet	3894000000	USD
CY2014	us-gaap	Other Sales Revenue Net OtherSalesRevenueNet	4474000000	USD
CY2015	us-gaap	Passenger Revenue PassengerRevenue	34782000000	USD
CY2013	us-gaap	Passenger Revenue PassengerRevenue	32942000000	USD
CY2014	us-gaap	Passenger Revenue PassengerRevenue	34954000000	USD
CY2015	us-gaap	Passenger Revenue Mainline PassengerRevenueMainline	28898000000	USD
CY2013	us-gaap	Passenger Revenue Mainline PassengerRevenueMainline	26534000000	USD
CY2014	us-gaap	Passenger Revenue Mainline PassengerRevenueMainline	28688000000	USD
CY2015	us-gaap	Passenger Revenue Regional PassengerRevenueRegional	5884000000	USD
CY2013	us-gaap	Passenger Revenue Regional PassengerRevenueRegional	6408000000	USD
CY2014	us-gaap	Passenger Revenue Regional PassengerRevenueRegional	6266000000	USD
CY2015	us-gaap	Payments For Derivative Instrument Financing Activities PaymentsForDerivativeInstrumentFinancingActivities	71000000	USD
CY2013	us-gaap	Payments For Derivative Instrument Financing Activities PaymentsForDerivativeInstrumentFinancingActivities	0	USD
CY2014	us-gaap	Payments For Derivative Instrument Financing Activities PaymentsForDerivativeInstrumentFinancingActivities	0	USD
CY2015	us-gaap	Payments For Flight Equipment PaymentsForFlightEquipment	2223000000	USD
CY2013	us-gaap	Payments For Flight Equipment PaymentsForFlightEquipment	2117000000	USD
CY2014	us-gaap	Payments For Flight Equipment PaymentsForFlightEquipment	1662000000	USD
CY2015	us-gaap	Payments For Proceeds From Other Investing Activities PaymentsForProceedsFromOtherInvestingActivities	-25000000	USD
CY2013	us-gaap	Payments For Proceeds From Other Investing Activities PaymentsForProceedsFromOtherInvestingActivities	-14000000	USD
CY2014	us-gaap	Payments For Proceeds From Other Investing Activities PaymentsForProceedsFromOtherInvestingActivities	-48000000	USD
CY2015	us-gaap	Payments For Proceeds From Previous Acquisition PaymentsForProceedsFromPreviousAcquisition	276000000	USD
CY2013	us-gaap	Payments For Proceeds From Previous Acquisition PaymentsForProceedsFromPreviousAcquisition	47000000	USD
CY2014	us-gaap	Payments For Proceeds From Previous Acquisition PaymentsForProceedsFromPreviousAcquisition	0	USD
CY2015	us-gaap	Payments For Repurchase Of Common Stock PaymentsForRepurchaseOfCommonStock	2200000000	USD
CY2013	us-gaap	Payments For Repurchase Of Common Stock PaymentsForRepurchaseOfCommonStock	250000000	USD
CY2014	us-gaap	Payments For Repurchase Of Common Stock PaymentsForRepurchaseOfCommonStock	1100000000	USD
CY2015	us-gaap	Payments Of Dividends PaymentsOfDividends	359000000	USD
CY2013	us-gaap	Payments Of Dividends PaymentsOfDividends	102000000	USD
CY2014	us-gaap	Payments Of Dividends PaymentsOfDividends	251000000	USD
CY2015	us-gaap	Payments To Acquire Equity Method Investments PaymentsToAcquireEquityMethodInvestments	500000000	USD
CY2013	us-gaap	Payments To Acquire Equity Method Investments PaymentsToAcquireEquityMethodInvestments	360000000	USD
CY2014	us-gaap	Payments To Acquire Equity Method Investments PaymentsToAcquireEquityMethodInvestments	0	USD
CY2015	us-gaap	Payments To Acquire Investments PaymentsToAcquireInvestments	998000000	USD
CY2013	us-gaap	Payments To Acquire Investments PaymentsToAcquireInvestments	959000000	USD
CY2014	us-gaap	Payments To Acquire Investments PaymentsToAcquireInvestments	1795000000	USD
CY2015	us-gaap	Payments To Acquire Other Productive Assets PaymentsToAcquireOtherProductiveAssets	722000000	USD
CY2013	us-gaap	Payments To Acquire Other Productive Assets PaymentsToAcquireOtherProductiveAssets	404000000	USD
CY2014	us-gaap	Payments To Acquire Other Productive Assets PaymentsToAcquireOtherProductiveAssets	587000000	USD
CY2015	us-gaap	Payments To Acquire Productive Assets PaymentsToAcquireProductiveAssets	2945000000	USD
CY2013	us-gaap	Payments To Acquire Productive Assets PaymentsToAcquireProductiveAssets	2568000000	USD
CY2014	us-gaap	Payments To Acquire Productive Assets PaymentsToAcquireProductiveAssets	2249000000	USD
CY2015	us-gaap	Pension And Other Postretirement Benefit Expense PensionAndOtherPostretirementBenefitExpense	-1013000000	USD
CY2013	us-gaap	Pension And Other Postretirement Benefit Expense PensionAndOtherPostretirementBenefitExpense	-624000000	USD
CY2014Q4	us-gaap	Pension And Other Postretirement Defined Benefit Plans Liabilities Noncurrent PensionAndOtherPostretirementDefinedBenefitPlansLiabilitiesNoncurrent	15138000000	USD
CY2014	us-gaap	Pension And Other Postretirement Benefit Expense PensionAndOtherPostretirementBenefitExpense	-723000000	USD
CY2013	us-gaap	Proceeds From Derivative Instrument Financing Activities ProceedsFromDerivativeInstrumentFinancingActivities	0	USD
CY2014	us-gaap	Proceeds From Derivative Instrument Financing Activities ProceedsFromDerivativeInstrumentFinancingActivities	0	USD
CY2015Q4	us-gaap	Pension And Other Postretirement Defined Benefit Plans Liabilities Noncurrent PensionAndOtherPostretirementDefinedBenefitPlansLiabilitiesNoncurrent	13855000000	USD
CY2015Q4	us-gaap	Preferred Stock Shares Authorized PreferredStockSharesAuthorized	500000000	shares
CY2014Q4	us-gaap	Prepaid Expense And Other Assets Current PrepaidExpenseAndOtherAssetsCurrent	701000000	USD
CY2015Q4	us-gaap	Prepaid Expense And Other Assets Current PrepaidExpenseAndOtherAssetsCurrent	796000000	USD
CY2014Q4	us-gaap	Price Risk Derivatives At Fair Value Net PriceRiskDerivativesAtFairValueNet	-1848000000	USD
CY2015Q4	us-gaap	Price Risk Derivatives At Fair Value Net PriceRiskDerivativesAtFairValueNet	-672000000	USD
CY2015	us-gaap	Proceeds From Derivative Instrument Financing Activities ProceedsFromDerivativeInstrumentFinancingActivities	429000000	USD
CY2015	us-gaap	Proceeds From Issuance Of Long Term Debt ProceedsFromIssuanceOfLongTermDebt	1038000000	USD
CY2013	us-gaap	Proceeds From Issuance Of Long Term Debt ProceedsFromIssuanceOfLongTermDebt	268000000	USD
CY2014	us-gaap	Proceeds From Issuance Of Long Term Debt ProceedsFromIssuanceOfLongTermDebt	1020000000	USD
CY2015	us-gaap	Proceeds From Other Short Term Debt ProceedsFromOtherShortTermDebt	-340000000	USD
CY2013	us-gaap	Proceeds From Other Short Term Debt ProceedsFromOtherShortTermDebt	147000000	USD
CY2014	us-gaap	Proceeds From Other Short Term Debt ProceedsFromOtherShortTermDebt	-41000000	USD
CY2015	us-gaap	Proceeds From Payments For Other Financing Activities ProceedsFromPaymentsForOtherFinancingActivities	-27000000	USD
CY2013	us-gaap	Proceeds From Payments For Other Financing Activities ProceedsFromPaymentsForOtherFinancingActivities	78000000	USD
CY2014	us-gaap	Proceeds From Payments For Other Financing Activities ProceedsFromPaymentsForOtherFinancingActivities	60000000	USD
CY2015	us-gaap	Proceeds From Sale Maturity And Collections Of Investments ProceedsFromSaleMaturityAndCollectionsOfInvestments	739000000	USD
CY2013	us-gaap	Proceeds From Sale Maturity And Collections Of Investments ProceedsFromSaleMaturityAndCollectionsOfInvestments	1117000000	USD
CY2014	us-gaap	Proceeds From Sale Maturity And Collections Of Investments ProceedsFromSaleMaturityAndCollectionsOfInvestments	1533000000	USD
CY2015	us-gaap	Professional And Contract Services Expense ProfessionalAndContractServicesExpense	1848000000	USD
CY2013	us-gaap	Professional And Contract Services Expense ProfessionalAndContractServicesExpense	1665000000	USD
CY2014	us-gaap	Professional And Contract Services Expense ProfessionalAndContractServicesExpense	1749000000	USD
CY2014Q4	us-gaap	Property Plant And Equipment Net PropertyPlantAndEquipmentNet	21929000000	USD
CY2015Q4	us-gaap	Property Plant And Equipment Net PropertyPlantAndEquipmentNet	23039000000	USD
CY2014Q1	us-gaap	Quarterly Financial Information Quarterly Charges And Credits Amount Affecting Comparability QuarterlyFinancialInformationQuarterlyChargesAndCreditsAmountAffectingComparability	-109000000	USD
CY2014Q2	us-gaap	Quarterly Financial Information Quarterly Charges And Credits Amount Affecting Comparability QuarterlyFinancialInformationQuarterlyChargesAndCreditsAmountAffectingComparability	-140000000	USD
CY2014Q3	us-gaap	Quarterly Financial Information Quarterly Charges And Credits Amount Affecting Comparability QuarterlyFinancialInformationQuarterlyChargesAndCreditsAmountAffectingComparability	-1058000000	USD
CY2014Q4	us-gaap	Quarterly Financial Information Quarterly Charges And Credits Amount Affecting Comparability QuarterlyFinancialInformationQuarterlyChargesAndCreditsAmountAffectingComparability	-2157000000	USD
CY2015Q1	us-gaap	Quarterly Financial Information Quarterly Charges And Credits Amount Affecting Comparability QuarterlyFinancialInformationQuarterlyChargesAndCreditsAmountAffectingComparability	592000000	USD
CY2015Q2	us-gaap	Quarterly Financial Information Quarterly Charges And Credits Amount Affecting Comparability QuarterlyFinancialInformationQuarterlyChargesAndCreditsAmountAffectingComparability	726000000	USD
CY2015Q3	us-gaap	Quarterly Financial Information Quarterly Charges And Credits Amount Affecting Comparability QuarterlyFinancialInformationQuarterlyChargesAndCreditsAmountAffectingComparability	-112000000	USD
CY2015Q4	us-gaap	Quarterly Financial Information Quarterly Charges And Credits Amount Affecting Comparability QuarterlyFinancialInformationQuarterlyChargesAndCreditsAmountAffectingComparability	86000000	USD
CY2014Q4	us-gaap	Receivables Net Current ReceivablesNetCurrent	2297000000	USD
CY2015Q4	us-gaap	Receivables Net Current ReceivablesNetCurrent	2020000000	USD
CY2015	us-gaap	Reclassification From Accumulated Other Comprehensive Income Current Period Net Of Tax ReclassificationFromAccumulatedOtherComprehensiveIncomeCurrentPeriodNetOfTax	-28000000	USD
CY2013	us-gaap	Reclassification From Accumulated Other Comprehensive Income Current Period Net Of Tax ReclassificationFromAccumulatedOtherComprehensiveIncomeCurrentPeriodNetOfTax	-410000000	USD
CY2014	us-gaap	Reclassification From Accumulated Other Comprehensive Income Current Period Net Of Tax ReclassificationFromAccumulatedOtherComprehensiveIncomeCurrentPeriodNetOfTax	7000000	USD
CY2015	us-gaap	Repayments Of Long Term Debt And Capital Securities RepaymentsOfLongTermDebtAndCapitalSecurities	2558000000	USD
CY2013	us-gaap	Repayments Of Long Term Debt And Capital Securities RepaymentsOfLongTermDebtAndCapitalSecurities	1461000000	USD
CY2014	us-gaap	Repayments Of Long Term Debt And Capital Securities RepaymentsOfLongTermDebtAndCapitalSecurities	2928000000	USD
CY2015	us-gaap	Restructuring Costs And Asset Impairment Charges RestructuringCostsAndAssetImpairmentCharges	35000000	USD
CY2013	us-gaap	Restructuring Costs And Asset Impairment Charges RestructuringCostsAndAssetImpairmentCharges	285000000	USD
CY2014	us-gaap	Restructuring Costs And Asset Impairment Charges RestructuringCostsAndAssetImpairmentCharges	758000000	USD
CY2015	us-gaap	Restructuring Settlement And Impairment Provisions RestructuringSettlementAndImpairmentProvisions	35000000	USD
CY2013	us-gaap	Restructuring Settlement And Impairment Provisions RestructuringSettlementAndImpairmentProvisions	402000000	USD
CY2014	us-gaap	Restructuring Settlement And Impairment Provisions RestructuringSettlementAndImpairmentProvisions	716000000	USD
CY2014Q4	us-gaap	Retained Earnings Accumulated Deficit RetainedEarningsAccumulatedDeficit	3456000000	USD
CY2015Q4	us-gaap	Retained Earnings Accumulated Deficit RetainedEarningsAccumulatedDeficit	7623000000	USD
CY2015	us-gaap	Revenues Revenues	40704000000	USD
CY2013	us-gaap	Revenues Revenues	37773000000	USD
CY2014Q1	us-gaap	Revenues Revenues	8916000000	USD
CY2014Q2	us-gaap	Revenues Revenues	10621000000	USD
CY2014Q3	us-gaap	Revenues Revenues	11178000000	USD
CY2014Q4	us-gaap	Revenues Revenues	9647000000	USD
CY2014	us-gaap	Revenues Revenues	40362000000	USD
CY2015Q1	us-gaap	Revenues Revenues	9388000000	USD
CY2015Q2	us-gaap	Revenues Revenues	10707000000	USD
CY2015Q3	us-gaap	Revenues Revenues	11107000000	USD
CY2015Q4	us-gaap	Revenues Revenues	9502000000	USD
CY2015	us-gaap	Selling And Marketing Expense SellingAndMarketingExpense	1672000000	USD
CY2013	us-gaap	Selling And Marketing Expense SellingAndMarketingExpense	1603000000	USD
CY2014	us-gaap	Selling And Marketing Expense SellingAndMarketingExpense	1700000000	USD
CY2015	us-gaap	Share Based Compensation ShareBasedCompensation	76000000	USD
CY2013	us-gaap	Share Based Compensation ShareBasedCompensation	90000000	USD
CY2014	us-gaap	Share Based Compensation ShareBasedCompensation	81000000	USD
CY2015Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Nonvested Number ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber	2500000	shares
CY2015Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Number Of Shares Authorized ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAuthorized	157000000	shares
CY2015Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Exercisable Number ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableNumber	4600000	shares
CY2015Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Exercisable Weighted Average Exercise Price ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableWeightedAverageExercisePrice	15.05
CY2015Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Number ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber	5300000	shares
CY2014Q4	us-gaap	Short Term Investments ShortTermInvestments	1217000000	USD
CY2015Q4	us-gaap	Short Term Investments ShortTermInvestments	1465000000	USD
CY2015	us-gaap	Stock Issued During Period Value Share Based Compensation StockIssuedDuringPeriodValueShareBasedCompensation	16000000	USD
CY2013	us-gaap	Stock Issued During Period Value Share Based Compensation StockIssuedDuringPeriodValueShareBasedCompensation	66000000	USD
CY2014	us-gaap	Stock Issued During Period Value Share Based Compensation StockIssuedDuringPeriodValueShareBasedCompensation	26000000	USD
CY2015	us-gaap	Stock Issued During Period Value Stock Options Exercised StockIssuedDuringPeriodValueStockOptionsExercised	18000000	USD
CY2013	us-gaap	Stock Issued During Period Value Stock Options Exercised StockIssuedDuringPeriodValueStockOptionsExercised	73000000	USD
CY2014	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
CY2013	us-gaap	Stock Repurchased And Retired During Period Value StockRepurchasedAndRetiredDuringPeriodValue	250000000	USD
CY2014	us-gaap	Stock Repurchased And Retired During Period Value StockRepurchasedAndRetiredDuringPeriodValue	1100000000	USD
CY2012Q4	us-gaap	Stockholders Equity StockholdersEquity	-2131000000	USD
CY2013Q4	us-gaap	Stockholders Equity StockholdersEquity	11643000000	USD
CY2014Q4	us-gaap	Stockholders Equity StockholdersEquity	8813000000	USD
CY2015Q4	us-gaap	Stockholders Equity StockholdersEquity	10850000000	USD
CY2015	us-gaap	Treasury Stock Acquired Average Cost Per Share TreasuryStockAcquiredAverageCostPerShare	17.70
CY2014	us-gaap	Treasury Stock Acquired Average Cost Per Share TreasuryStockAcquiredAverageCostPerShare	15.82
CY2014Q4	us-gaap	Treasury Stock Shares TreasuryStockShares	19790077	shares
CY2015Q4	us-gaap	Treasury Stock Shares TreasuryStockShares	21066684	shares
CY2014Q4	us-gaap	Treasury Stock Value TreasuryStockValue	313000000	USD
CY2015Q4	us-gaap	Treasury Stock Value TreasuryStockValue	373000000	USD
CY2013Q4	us-gaap	Unrecognized Tax Benefits UnrecognizedTaxBenefits	37000000	USD
CY2014Q4	us-gaap	Unrecognized Tax Benefits UnrecognizedTaxBenefits	40000000	USD
CY2015Q4	us-gaap	Unrecognized Tax Benefits UnrecognizedTaxBenefits	32000000	USD
CY2015	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	804000000	shares
CY2013	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	858000000	shares
CY2014	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	845000000	shares
CY2015	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	797000000	shares
CY2013	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	849000000	shares
CY2014	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	836000000	shares
CY2015	us-gaap	Advertising Cost Policy Expensed Advertising Cost AdvertisingCostPolicyExpensedAdvertisingCost	<div style="font-family:Times New Roman;font-size:10pt;"><div style="line-height:120%;text-align:left;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;font-style:italic;font-weight:bold;">Advertising Costs</font></div><div style="line-height:120%;text-align:left;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"><br clear="none"/></font></div><div style="line-height:120%;text-align:left;text-indent:18px;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">We expense advertising costs in passenger commissions and other selling expenses in the year incurred. </font></div></div>
CY2015	us-gaap	Property Plant And Equipment Impairment PropertyPlantAndEquipmentImpairment	<div style="font-family:Times New Roman;font-size:10pt;"><div style="line-height:120%;text-align:left;text-indent:18px;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;color:#000000;text-decoration:none;">We record impairment losses on flight equipment and other long-lived assets used in operations when events and circumstances indicate the assets may be impaired and the estimated future cash flows generated by those assets are less than their carrying amounts. Factors which could cause 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.</font></font><font style="font-family:inherit;font-size:10pt;"> </font></div><div style="line-height:120%;text-align:left;text-indent:18px;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;color:#000000;text-decoration:none;">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.</font></font><font style="font-family:inherit;font-size:10pt;"> </font></div></div>
CY2015	us-gaap	Revenue Recognition Deferred Revenue RevenueRecognitionDeferredRevenue	<div style="font-family:Times New Roman;font-size:10pt;"><div style="line-height:120%;text-align:left;text-indent:18px;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;font-style:italic;">Passenger Ticket Sales Earning Mileage Credits. </font><font style="font-family:inherit;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;color:#000000;font-style:normal;text-decoration:none;">Passenger ticket sales earning mileage credits under our SkyMiles Program provide customers with two deliverables: (1) mileage credits earned and (2) air transportation.</font></font><font style="font-family:inherit;font-size:10pt;"> </font><font style="font-family:inherit;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;color:#000000;font-style:normal;text-decoration:none;">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.</font></font></div><div style="line-height:120%;text-align:left;text-indent:18px;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;color:#000000;text-decoration:none;">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.</font></font><font style="font-family:inherit;font-size:10pt;"> </font></div><div style="line-height:120%;text-align:left;text-indent:18px;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"><br clear="none"/></font></div><div style="line-height:120%;text-align:left;text-indent:18px;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;font-style:italic;">Sale of Mileage Credits.</font><font style="font-family:inherit;font-size:10pt;"> </font><font 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.</font></div><div style="line-height:120%;text-align:left;text-indent:18px;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"><br clear="none"/></font></div><div style="line-height:120%;text-align:left;text-indent:18px;font-size:10pt;"><font 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.</font></div><div style="line-height:120%;text-align:left;text-indent:18px;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"><br clear="none"/></font></div><div style="line-height:120%;text-indent:18px;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">In December 2014, we amended our marketing agreements with American Express which increased the value we receive under the agreements and extended the term to 2022. The amended agreements became effective January 1, 2015. The deliverables under the amended agreements are substantially similar to the previous agreement. We account for the amended agreements consistent with the accounting method adopted in September 2013 that allocates the consideration received to the individual products and services delivered based on their relative selling prices (discussed below). The increased value received under the amended agreements increases the amount of deferred revenue for the travel component and increases the value of the other deliverables, which are recognized in other revenue as they are provided.</font></div><div style="line-height:120%;font-size:11pt;"><font style="font-family:inherit;font-size:11pt;"><br clear="none"/></font></div><div style="line-height:120%;text-align:left;text-indent:18px;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">In September 2013, we modified our marketing agreements with American Express, which required us to change the accounting method for recording SkyMiles sold. Under the previous method, the embedded premium or discount was allocated to the residual products or services in a combined transaction. The new method allocates consideration received based on the relative selling price of each product or service. </font><font style="font-family:inherit;font-size:10pt;">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. The impact of adopting the relative selling price method re-allocated a portion of the embedded discount to the travel component, lowering the deferral rate we use to record miles sold under the agreements and increasing revenue recognized on the remaining deliverables.</font><font style="font-family:inherit;font-size:10pt;"> </font></div><div style="line-height:120%;text-align:left;text-indent:18px;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"><br clear="none"/></font></div><div style="line-height:120%;text-indent:18px;font-size:10pt;"><font 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.</font></div><div style="line-height:120%;text-indent:18px;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"><br clear="none"/></font></div><div style="line-height:120%;text-align:left;text-indent:18px;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;font-style:italic;">Breakage. </font><font style="font-family:inherit;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;color:#000000;font-style:normal;text-decoration:none;">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.</font></font><font style="font-family:inherit;font-size:10pt;font-style:italic;"> </font></div></div>
CY2015	us-gaap	Revenue Recognition Loyalty Programs RevenueRecognitionLoyaltyPrograms	<div style="font-family:Times New Roman;font-size:10pt;"><div style="line-height:120%;text-align:left;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;font-style:italic;font-weight:bold;">Frequent Flyer Program</font></div><div style="line-height:120%;text-align:left;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"><br clear="none"/></font></div><div style="line-height:120%;text-align:left;text-indent:18px;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">Our SkyMiles Program </font><font style="font-family:inherit;font-size:10pt;">offers incentives to travel on Delta. This program allows customers to earn mileage credits by flying on Delta, Delta Connection </font><font style="font-family:inherit;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;color:#000000;text-decoration:none;">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. </font></font><font style="font-family:inherit;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;color:#000000;text-decoration:none;">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.</font></font><font style="font-family:inherit;font-size:10pt;"> </font></div><div style="line-height:120%;text-align:left;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"><br clear="none"/></font></div><div style="line-height:120%;text-align:left;text-indent:18px;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;color:#000000;text-decoration:none;">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.</font></font><font style="font-family:inherit;font-size:10pt;"> </font></div><div style="line-height:120%;text-align:left;text-indent:18px;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"><br clear="none"/></font></div><div style="line-height:120%;text-align:left;text-indent:18px;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;font-style:italic;">Passenger Ticket Sales Earning Mileage Credits. </font><font style="font-family:inherit;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;color:#000000;font-style:normal;text-decoration:none;">Passenger ticket sales earning mileage credits under our SkyMiles Program provide customers with two deliverables: (1) mileage credits earned and (2) air transportation.</font></font><font style="font-family:inherit;font-size:10pt;"> </font><font style="font-family:inherit;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;color:#000000;font-style:normal;text-decoration:none;">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.</font></font></div><div style="line-height:120%;text-align:left;text-indent:18px;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;color:#000000;text-decoration:none;">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.</font></font><font style="font-family:inherit;font-size:10pt;"> </font></div><div style="line-height:120%;text-align:left;text-indent:18px;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"><br clear="none"/></font></div><div style="line-height:120%;text-align:left;text-indent:18px;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;font-style:italic;">Sale of Mileage Credits.</font><font style="font-family:inherit;font-size:10pt;"> </font><font 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.</font></div><div style="line-height:120%;text-align:left;text-indent:18px;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"><br clear="none"/></font></div><div style="line-height:120%;text-align:left;text-indent:18px;font-size:10pt;"><font 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.</font></div><div style="line-height:120%;text-align:left;text-indent:18px;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"><br clear="none"/></font></div><div style="line-height:120%;text-indent:18px;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">In December 2014, we amended our marketing agreements with American Express which increased the value we receive under the agreements and extended the term to 2022. The amended agreements became effective January 1, 2015. The deliverables under the amended agreements are substantially similar to the previous agreement. We account for the amended agreements consistent with the accounting method adopted in September 2013 that allocates the consideration received to the individual products and services delivered based on their relative selling prices (discussed below). The increased value received under the amended agreements increases the amount of deferred revenue for the travel component and increases the value of the other deliverables, which are recognized in other revenue as they are provided.</font></div><div style="line-height:120%;font-size:11pt;"><font style="font-family:inherit;font-size:11pt;"><br clear="none"/></font></div><div style="line-height:120%;text-align:left;text-indent:18px;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">In September 2013, we modified our marketing agreements with American Express, which required us to change the accounting method for recording SkyMiles sold. Under the previous method, the embedded premium or discount was allocated to the residual products or services in a combined transaction. The new method allocates consideration received based on the relative selling price of each product or service. </font><font style="font-family:inherit;font-size:10pt;">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. The impact of adopting the relative selling price method re-allocated a portion of the embedded discount to the travel component, lowering the deferral rate we use to record miles sold under the agreements and increasing revenue recognized on the remaining deliverables.</font><font style="font-family:inherit;font-size:10pt;"> </font></div><div style="line-height:120%;text-align:left;text-indent:18px;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"><br clear="none"/></font></div><div style="line-height:120%;text-indent:18px;font-size:10pt;"><font 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.</font></div><div style="line-height:120%;text-indent:18px;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"><br clear="none"/></font></div><div style="line-height:120%;text-align:left;text-indent:18px;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;font-style:italic;">Breakage. </font><font style="font-family:inherit;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;color:#000000;font-style:normal;text-decoration:none;">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.</font></font><font style="font-family:inherit;font-size:10pt;font-style:italic;"></font></div></div>
CY2015	us-gaap	Revenue Recognition Sales Of Services RevenueRecognitionSalesOfServices	<div style="font-family:Times New Roman;font-size:10pt;"><div style="line-height:120%;text-align:left;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;font-style:italic;font-weight:bold;">Passenger Tickets</font></div><div style="line-height:120%;text-align:left;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"><br clear="none"/></font></div><div style="line-height:120%;text-align:left;text-indent:18px;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">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.</font></div><div style="line-height:120%;text-align:left;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"><br clear="none"/></font></div></div>
CY2015	us-gaap	Use Of Estimates UseOfEstimates	<div style="font-family:Times New Roman;font-size:10pt;"><div style="line-height:120%;text-align:left;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;font-style:italic;font-weight:bold;">Use of Estimates</font></div><div style="line-height:120%;text-align:left;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"><br clear="none"/></font></div><div style="line-height:120%;text-align:left;text-indent:18px;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">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.</font></div></div>

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$DAL
DELTA AIR LINES, INC. Stock $dal

2014 Q4 Form 10-K Financial Statement

#000002790416000018 Filed on February 05, 2016

Income Statement

Balance Sheet

Cashflow Statement

Facts In Submission

Files In Submission

$DAL DELTA AIR LINES, INC. Stock $dal

2014 Q4 Form 10-K Financial Statement

#000002790416000018 Filed on February 05, 2016

Income Statement

Balance Sheet

Cashflow Statement

Facts In Submission

Files In Submission

$DAL
DELTA AIR LINES, INC. Stock $dal