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The costs primarily consist of fees paid to the airport authority for takeoff and landing, gate space and facilities, allocations of common space such as security and other terminal costs and fuel storage facilities.No authoritative reference available.falsefalseLanding fees and other rents11false0us-gaap_DepreciationAndAmortizationus-gaaptruedebitdurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalseverboselabel1truefalsefalse5600000056falsefalsefalsefalsefalse2truefalsefalse5700000057falsefalsefalsefalsefalseMonetaryxbrli:monetaryItemTypemonetaryThe current period expense charged against earnings on long-lived, physical assets not used in production, and which are not intended for resale, to allocate or recognize the cost of such assets over their useful lives; or to record the reduction in book value of an intangible asset over the benefit period of such asset; or to reflect consumption during the period of an asset that is not used in production.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 95 -Paragraph 28 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher AICPA -Name Accounting Principles Board Opinion (APB) -Number 12 -Paragraph 5 falsefalseDepreciation and amortization12false0jblu_AircraftRentaljblufalsedebitdurationExpenses incurred related to the lease of aircraft from outside third parties that are used in the Company's business...falsefalsefalsefalsefalsefalsefalsefalsefalsefalseverboselabel1truefalsefalse3400000034falsefalsefalsefalsefalse2truefalsefalse3100000031falsefalsefalsefalsefalseMonetaryxbrli:monetaryItemTypemonetaryExpenses incurred related to the lease of aircraft from outside third parties that are used in the Company's business operations.No authoritative reference available.falsefalseAircraft rent13false0us-gaap_SellingAndMarketingExpenseus-gaaptruedebitdurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalseverboselabel1truefalsefalse4500000045falsefalsefalsefalsefalse2truefalsefalse4000000040falsefalsefalsefalsefalseMonetaryxbrli:monetaryItemTypemonetaryThe aggregate total amount of expenses directly related to the marketing or selling of products or services.No authoritative reference available.falsefalseSales and marketing14false0jblu_AircraftMaintenanceMaterialsAndRepairsjblufalsedebitdurationMaintenance costs incurred and directly related to services rendered by an entity during the reporting period. Includes the...falsefalsefalsefalsefalsefalsefalsefalsefalsefalseverboselabel1truefalsefalse5200000052falsefalsefalsefalsefalse2truefalsefalse3900000039falsefalsefalsefalsefalseMonetaryxbrli:monetaryItemTypemonetaryMaintenance costs incurred and directly related to services rendered by an entity during the reporting period. 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