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v2.4.1.9

Income Taxes (Detail) (USD $) In Millions, unless otherwise specified | 12 Months Ended
--- | ---
Dec. 31, 2014 | Dec. 31, 2013 | Dec. 31, 2012
DEFERRED TAX LIABILITIES: |  |  |
Accelerated depreciation | $ 4,277 us-gaap_DeferredTaxLiabilitiesPropertyPlantAndEquipment | $ 4,069 us-gaap_DeferredTaxLiabilitiesPropertyPlantAndEquipment |
Fuel derivative instruments | 0 us-gaap_DeferredTaxLiabilitiesDerivatives | 36 us-gaap_DeferredTaxLiabilitiesDerivatives |
Other | 51 us-gaap_DeferredTaxLiabilitiesOther | 84 us-gaap_DeferredTaxLiabilitiesOther |
Total deferred tax liabilities | 4,328 us-gaap_DeferredTaxLiabilities | 4,189 us-gaap_DeferredTaxLiabilities |
DEFERRED TAX ASSETS: |  |  |
Fuel derivative instruments | 521 us-gaap_DeferredTaxAssetsDerivativeInstruments | 8 us-gaap_DeferredTaxAssetsDerivativeInstruments |
Deferred gains from sale and leaseback of aircraft | 20 us-gaap_DeferredTaxAssetsDeferredGainOnSaleLeasebackTransaction | 24 us-gaap_DeferredTaxAssetsDeferredGainOnSaleLeasebackTransaction |
Capital and operating leases | 125 luv_DeferredTaxAssetsCapitalAndOperatingLeases | 163 luv_DeferredTaxAssetsCapitalAndOperatingLeases |
Deferred tax assets construction obligation | 209 luv_DeferredTaxAssetsConstructionObligation | 168 luv_DeferredTaxAssetsConstructionObligation |
Accrued engine maintenance | 83 luv_DeferredTaxAssetsTaxDeferredExpenseEngineMaintenance | 90 luv_DeferredTaxAssetsTaxDeferredExpenseEngineMaintenance |
Accrued employee benefits | 334 us-gaap_DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsEmployeeBenefits | 307 us-gaap_DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsEmployeeBenefits |
State taxes | 65 us-gaap_DeferredTaxAssetsOperatingLossCarryforwardsStateAndLocal | 74 us-gaap_DeferredTaxAssetsOperatingLossCarryforwardsStateAndLocal |
Business partner income | 90 us-gaap_DeferredTaxAssetsFrequentFlierLiability | 457 us-gaap_DeferredTaxAssetsFrequentFlierLiability |
Net operating losses and credit carryforwards | 3 luv_DeferredTaxAssetsNetOperatingLossesAndCreditCarrybacks | 14 luv_DeferredTaxAssetsNetOperatingLossesAndCreditCarrybacks |
Other | 96 us-gaap_DeferredTaxAssetsOther | 118 us-gaap_DeferredTaxAssetsOther |
Total deferred tax assets | 1,546 us-gaap_DeferredTaxAssetsGross | 1,423 us-gaap_DeferredTaxAssetsGross |
Net deferred tax liability | 2,782 us-gaap_DeferredTaxAssetsLiabilitiesNet | 2,766 us-gaap_DeferredTaxAssetsLiabilitiesNet |
CURRENT: |  |  |
Federal | 203 us-gaap_CurrentFederalTaxExpenseBenefit | 355 us-gaap_CurrentFederalTaxExpenseBenefit | (45)us-gaap_CurrentFederalTaxExpenseBenefit
State | 29 us-gaap_CurrentStateAndLocalTaxExpenseBenefit | 44 us-gaap_CurrentStateAndLocalTaxExpenseBenefit | 12 us-gaap_CurrentStateAndLocalTaxExpenseBenefit
Total current | 232 us-gaap_CurrentIncomeTaxExpenseBenefit | 399 us-gaap_CurrentIncomeTaxExpenseBenefit | (33)us-gaap_CurrentIncomeTaxExpenseBenefit
DEFERRED: |  |  |
Federal | 421 us-gaap_DeferredFederalIncomeTaxExpenseBenefit | 62 us-gaap_DeferredFederalIncomeTaxExpenseBenefit | 287 us-gaap_DeferredFederalIncomeTaxExpenseBenefit
State | 27 us-gaap_DeferredStateAndLocalIncomeTaxExpenseBenefit | (6)us-gaap_DeferredStateAndLocalIncomeTaxExpenseBenefit | 10 us-gaap_DeferredStateAndLocalIncomeTaxExpenseBenefit
Total deferred | 448 us-gaap_DeferredIncomeTaxExpenseBenefit | 56 us-gaap_DeferredIncomeTaxExpenseBenefit | 297 us-gaap_DeferredIncomeTaxExpenseBenefit
Total | 680 us-gaap_IncomeTaxExpenseBenefit | 455 us-gaap_IncomeTaxExpenseBenefit | 264 us-gaap_IncomeTaxExpenseBenefit
Income Tax Expense (Benefit), Continuing Operations, Income Tax Reconciliation [Abstract] |  |  |
Tax at statutory U.S. tax rates | 636 us-gaap_IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate | 423 us-gaap_IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate | 240 us-gaap_IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate
Nondeductible items | 9 us-gaap_IncomeTaxReconciliationNondeductibleExpense | 10 us-gaap_IncomeTaxReconciliationNondeductibleExpense | 10 us-gaap_IncomeTaxReconciliationNondeductibleExpense
State income taxes, net of federal benefit | 37 us-gaap_IncomeTaxReconciliationStateAndLocalIncomeTaxes | 25 us-gaap_IncomeTaxReconciliationStateAndLocalIncomeTaxes | 14 us-gaap_IncomeTaxReconciliationStateAndLocalIncomeTaxes
Other, net | (2)us-gaap_IncomeTaxReconciliationOtherReconcilingItems | (3)us-gaap_IncomeTaxReconciliationOtherReconcilingItems | 0 us-gaap_IncomeTaxReconciliationOtherReconcilingItems
Unrecognized Tax Benefits | $ 5 us-gaap_UnrecognizedTaxBenefits |  |

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- Definition The amount of income tax expense or benefit for the period computed by applying the domestic federal statutory tax rates to pretax income from continuing operations. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 12 -URI http://asc.fasb.org/extlink&oid=6907707&loc=d3e32687-109319 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 13 -URI http://asc.fasb.org/extlink&oid=6907707&loc=d3e32698-109319 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 08 -Paragraph h -Subparagraph 2 -Article 4 + Details
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