JetBlue Airways (JBLU) 10-Q 27 Apr 18 2018 Q1 Quarterly report Financial data

Document and Entity Information

Document and Entity Information	3 Months Ended
	Mar. 31, 2018shares
Document And Entity Information [Abstract]
Entity Registrant Name	JETBLUE AIRWAYS CORP
Entity Central Index Key	1,158,463
Current Fiscal Year End Date	--12-31
Entity Filer Category	Large Accelerated Filer
Document Type	10-Q
Document Period End Date	Mar. 31, 2018
Document Fiscal Year Focus	2,018
Document Fiscal Period Focus	Q1
Amendment Flag	false
Entity Common Stock, Shares Outstanding	316,496,757
Entity Well-known Seasoned Issuer	Yes
Entity Voluntary Filers	No
Entity Current Reporting Status	Yes

Condensed Consolidated Balance

Condensed Consolidated Balance Sheets (Unaudited) - USD ($) $ in Millions	Mar. 31, 2018	Dec. 31, 2017
CURRENT ASSETS
Cash and cash equivalents	$ 511	$ 303
Investment securities	268	390
Receivables, less allowance (2018-$2; 2017-$1)	251	245
Prepaid expenses and other	290	268
Total current assets	1,320	1,206
PROPERTY AND EQUIPMENT
Flight equipment	9,149	8,980
Predelivery deposits for flight equipment	218	204
Flight Equipment, gross plus deposits	9,367	9,184
Less accumulated depreciation	2,206	2,125
Flight Equipment, Net	7,161	7,059
Other property and equipment	1,049	1,041
Less accumulated depreciation	419	405
Property plant and equipment other net	630	636
Assets constructed for others	561	561
Less accumulated depreciation	213	207
Asset constructed for others net	348	354
Total property and equipment	8,139	8,049
OTHER ASSETS
Investment securities	2	2
Restricted cash	60	56
Other	506	468
Total other assets	568	526
TOTAL ASSETS	10,027	9,781
CURRENT LIABILITIES
Accounts payable	451	378
Air traffic liability	1,185	966
Accrued salaries, wages and benefits	269	313
Other accrued liabilities	359	293
Current maturities of long-term debt and capital leases	248	196
Total current liabilities	2,512	2,146
LONG-TERM DEBT AND CAPITAL LEASE OBLIGATIONS	895	1,003
CONSTRUCTION OBLIGATION	436	441
DEFERRED TAXES AND OTHER LIABILITIES
Deferred income taxes	1,014	999
Frequent Flier Liability, Noncurrent	398	385
Other	75	75
Total deferred taxes and other liabilities	1,487	1,459
STOCKHOLDERS’ EQUITY
Preferred stock, $0.01 par value; 25 shares authorized, none issued	0	0
Common stock, $0.01 par value; 900 shares authorized, 419 and 418 shares issued and 316 and 321 shares outstanding at March 31, 2018 and December 31, 2017, respectively	4	4
Treasury stock, at cost; 103 and 97 shares at March 31, 2018 and December 31, 2017, respectively	(1,021)	(890)
Additional paid-in capital	2,134	2,127
Retained earnings	3,580	3,491
Accumulated other comprehensive income	0	0
Total stockholders’ equity	4,697	4,732
TOTAL LIABILITIES AND STOCKHOLDERS’ EQUITY	$ 10,027	$ 9,781

Condensed Consolidated Balance3

Condensed Consolidated Balance Sheets (Parenthetical) - USD ($) $ in Millions	Mar. 31, 2018	Dec. 31, 2017
Statement of Financial Position [Abstract]
Allowance for doubtful accounts receivable	$ 2	$ 1
Preferred stock, par value	$ 0.01	$ 0.01
Preferred stock, shares authorized	25,000,000	25,000,000
Preferred stock, shares issued	0	0
Common stock, par value	$ 0.01	$ 0.01
Common stock, shares authorized	900,000,000	900,000,000
Common stock, shares issued	419,000,000	418,000,000
Common stock, shares, outstanding	316,000,000	321,000,000
Treasury stock, shares	103,000,000	97,000,000

Consolidated Statements of Oper

Consolidated Statements of Operations (Unaudited) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
OPERATING REVENUES
Passenger	$ 1,692	$ 1,556
Other	62	44
Total operating revenues	1,754	1,600
OPERATING EXPENSES
Aircraft fuel and related taxes	417	323
Salaries, wages and benefits	499	466
Landing fees and other rents	100	95
Depreciation and amortization	117	105
Aircraft rent	24	26
Sales and marketing	67	61
Maintenance materials and repairs	142	152
Other operating expenses	260	230
Total operating expenses	1,626	1,458
OPERATING INCOME	128	142
OTHER INCOME (EXPENSE)
Interest expense	(22)	(25)
Capitalized interest	2	2
Interest income and other	2	2
Total other income (expense)	(18)	(21)
INCOME BEFORE TAXES	110	121
Income tax expense	22	39
NET INCOME	$ 88	$ 82
EARNINGS PER COMMON SHARE:
Earnings Per Share, Basic	$ 0.28	$ 0.25
Earnings Per Share, Diluted	$ 0.27	$ 0.24

Consolidated Statements of Comp

Consolidated Statements of Comprehensive Income (Unaudited) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Statement of Comprehensive Income [Abstract]
NET INCOME	$ 88	$ 82
Changes in fair value of derivative instruments, net of reclassifications into earnings (net of $0 and $(5) of taxes in 2018 and 2017, respectively)	0	(8)
Other Comprehensive Income (Loss), Tax, Portion Attributable to Parent	0	(5)
Total other comprehensive loss	0	(8)
COMPREHENSIVE INCOME	$ 88	$ 74

Condensed Consolidated Statemen

Condensed Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Statement of Cash Flows [Abstract]
Restricted Cash and Cash Equivalents, Noncurrent	$ 60	$ 61
Net Income	88	82
Adjustments to reconcile net income to net cash provided by operating activities:
Deferred income taxes	15	28
Depreciation	101	90
Amortization	16	15
Stock-based compensation	7	9
Changes in certain operating assets and liabilities	265	206
Other, net	2	2
Net cash provided by operating activities	494	432
CASH FLOWS FROM INVESTING ACTIVITIES
Capital expenditures	(184)	(245)
Predelivery deposits for flight equipment	(19)	(40)
Purchase of held-to-maturity investments	(50)	(63)
Proceeds from the maturities of held-to-maturity investments	111	43
Purchase of available-for-sale securities	(80)	(105)
Proceeds from the sale of available-for-sale securities	141	145
Other, net	(8)	(2)
Net cash used in investing activities	(89)	(267)
CASH FLOWS FROM FINANCING ACTIVITIES
Proceeds from issuance of common stock	0	2
Repayment of long-term debt and capital lease obligations	(58)	(50)
Payments for Repurchase of Common Stock	(131)	(109)
Other, net	(4)	(4)
Net cash used in financing activities	(193)	(161)
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents, Period Increase (Decrease), Excluding Exchange Rate Effect	212	4
Cash, cash equivalents and restricted cash at beginning of period	303
Cash, cash equivalents and restricted cash at end of period(1)	511	438
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents	$ 571	$ 499

Summary of Significant Accounti

Summary of Significant Accounting Policies (Notes)	3 Months Ended
	Mar. 31, 2018
Accounting Policies [Abstract]
Summary of Significant Accounting Policies	Summary of Significant Accounting Policies Basis of Presentation JetBlue Airways Corporation, or JetBlue, provides air transportation services across the United States, the Caribbean and Latin America. Our condensed consolidated financial statements include the accounts of JetBlue and our subsidiaries which are collectively referred to as “we” or the “Company.” All majority-owned subsidiaries are consolidated on a line by line basis, with all intercompany transactions and balances being eliminated. These condensed consolidated financial statements and related notes should be read in conjunction with our 2017 audited financial statements included in our Annual Report on Form 10-K for the year ended December 31, 2017 . These condensed consolidated financial statements are unaudited and have been prepared by us following the rules and regulations of the Securities and Exchange Commission, or the SEC. In our opinion they reflect all adjustments, including normal recurring items, that are necessary to present fairly the results for interim periods. Certain information and footnote disclosures normally included in financial statements prepared in accordance with generally accepted accounting principles in the U.S., or GAAP, have been condensed or omitted as permitted by such rules and regulations; however, we believe that the disclosures are adequate to make the information presented not misleading. Due to seasonal variations in the demand for air travel, the volatility of aircraft fuel prices and other factors, our operating results for the periods presented herein are not necessarily indicative of the results that may be expected for other interim periods or the entire fiscal year. We recasted financial information previously filed under Accounting Standards Codification Topic 605, Revenue Recognition for the periods presented to reflect full retrospective method of transition to ASU 2014-09, Revenue from Contracts with Customers. Investment securities Investment securities consist of available-for-sale investment securities and held-to-maturity investment securities. We use a specific identification method to determine the cost of the securities when they are sold. Held-to-maturity investment securities. The contractual maturities of the held-to-maturity investments we held as of March 31, 2018 were not greater than 24 months. We did not record any significant gains or losses on these securities during the three months ended March 31, 2018 or 2017 . The estimated fair value of these investments approximated their carrying value as of March 31, 2018 and December 31, 2017 , respectively. The carrying values of investment securities consisted of the following at March 31, 2018 and December 31, 2017 (in millions): March 31, 2018 December 31, 2017 Available-for-sale securities Time deposits $ 70 $ 130 Debt securities 5 6 Total available-for-sale securities 75 136 Held-to-maturity securities Treasury notes $ 195 $ 220 Corporate bonds — 36 Total held-to-maturity securities 195 256 Total investment securities $ 270 $ 392 Recent Accounting Pronouncements In May 2014, the FASB issued ASU 2014-09, Revenue from Contracts with Customers topic of the FASB Codification, or Codification, which supersedes existing revenue recognition guidance. Under the new standard, a company will recognize revenue when it transfers goods or services to customers in an amount that reflects the consideration to which the company expects to be entitled to in exchange for those goods or services. We adopted the requirements of ASU 2014-09 as of January 1, 2018 utilizing the full retrospective method of transition. We recorded a $48 million cumulative adjustment to retained earnings as of January 1, 2016, the beginning of the retrospective reporting period, for the impacts of the new accounting standard. The adoption of the new standard did not have a significant impact on earnings. For JetBlue, the most significant impact of the new standard relates to the accounting of our TrueBlue ® Loyalty Program. The new standard eliminated the incremental cost method for loyalty program accounting which we previously used. As a result, we had to revalue the liability for points earned on qualifying JetBlue purchases using a relative fair value approach. The application of a relative fair value approach increased our air traffic liability by approximately $286 million , net of breakage, as of the beginning of the retrospective reporting period. In addition, we had a liability for outstanding points that were earned in conjunction with our previous co-branded credit card agreement that had been recorded using the residual method. The new standard does not permit the usage of the residual method for this contract and instead, the transaction price is now allocated to the performance obligations on a relative selling price basis. This change decreased the relative value allocated to the transportation performance obligation and resulted in a decrease of $159 million , net of breakage, to the liability as of the beginning of the retrospective reporting period. The standard also resulted in a change in the timing and classification of our revenue recognition for certain ancillary fees directly related to passenger tickets. As a result, we reclassified $107 million from other revenue under the prior presentation to passenger revenue for the first quarter of 2017. Refer to Note 2 - Revenue Recognition for more information. During the first quarter of 2018, we adopted ASU 2016-18, Statement of Cash Flows (Topic 230), Restricted Cash of the Codification. The update clarified how entities should present restricted cash and restricted cash equivalents in the statement of cash flows. ASU 2016-18 requires entities to show the changes in the total of cash, cash equivalents, restricted cash and restricted cash equivalents in the statement of cash flows. As a result, entities will no longer present transfers between cash and cash equivalents and restricted cash and restricted cash equivalents in the statement of cash flows. Our condensed consolidated statements of cash flows for the three months ended March 31, 2017 reflects retrospective application. Our cash and cash equivalents include short-term, highly liquid investments which are readily convertible into cash. These investments include money market securities and commercial papers with maturities of three months or less when purchased. Restricted cash primarily consists of security deposits, funds held in escrow for estimated workers' compensation obligations and performance bonds for aircraft and facility leases. During the first quarter of 2018, we adopted ASU 2016-01, Financial Instruments-Overall (Topic 825) . The update made several changes, including the elimination of the available-for-sale classification of equity investments, and requires equity investments with readily determinable fair values to be measured at fair value with changes in fair value recognized in earnings. For equity investments without readily determinable fair values, the standard provides an alternative which allows entities to measure these investments at cost, less any impairment, adjusted for changes from observable price changes in orderly transactions for an identifiable or similar investments of the same issuer. Our wholly-owned subsidiary, JetBlue Technology Ventures, LLC, or JTV, has several equity investments in emerging companies which do not have readily determinable fair values. These investments were accounted for at cost during 2017. Under the updated standard, these investments are now accounted for using the measurement alternative. No gains or losses were recorded for these investments during the three months ended March 31, 2018. As of March 31, 2018, the carrying amount of these investments was $12 million . In February 2016, the FASB issued Accounting Standards Update, or ASU, 2016-02, Leases (Topic 842) of the Codification. Under ASU 2016-02, a lessee will recognize liabilities for lease payments and right-of-use assets representing its right to use the underlying asset for the lease term. While we are still evaluating the full impact of adopting the amendments on our consolidated financial statements and disclosures, we believe the adoption will have a significant impact on our Consolidated Balance Sheets. However, we do not expect ASU 2016-02 to have a significant impact to our Consolidated Statements of Operations. The amendments are effective for fiscal years beginning after December 15, 2018 and include interim periods within those fiscal years.

Long-term Debt and Short-term B

Long-term Debt and Short-term Borrowings (Notes)	3 Months Ended
	Mar. 31, 2018
Debt Disclosure [Abstract]
Long-term Debt, Short-term Borrowings, and Capital Lease Obligations	Long Term Debt, Short Term Borrowings, and Capital Lease Obligations During the three months ended March 31, 2018 , we made scheduled principal payments of $58 million on our outstanding long-term debt and capital lease obligations. We have pledged aircraft, engines, other equipment and facilities with a net book value of $2.3 billion at March 31, 2018 as security under various loan agreements. As of March 31, 2018 , we owned, free of encumbrance, 78 Airbus A320 aircraft, 46 Airbus A321 aircraft, one Embraer E190 aircraft, and 37 spare engines. At March 31, 2018 , scheduled maturities of all of our long-term debt and capital lease obligations were $138 million for the remainder of 2018, $215 million in 2019 , $179 million in 2020 , $164 million in 2021 , $142 million in 2022 and $305 million thereafter. The carrying amounts and estimated fair values of our long-term debt (excluding capital lease obligation) at March 31, 2018 and December 31, 2017 were as follows (in millions): March 31, 2018 December 31, 2017 Carrying Value Estimated Fair Value Carrying Value Estimated Fair Value Public Debt Fixed rate special facility bonds, due through 2036 $ 42 $ 45 $ 42 $ 46 Non-Public Debt Fixed rate enhanced equipment notes, due through 2023 159 163 169 178 Floating rate equipment notes, due through 2025 146 152 152 159 Fixed rate equipment notes, due through 2026 679 715 712 771 Total (1) $ 1,026 $ 1,075 $ 1,075 $ 1,154 (1) Total excludes capital lease obligations of $117 million for March 31, 2018 and $124 million for December 31, 2017. The estimated fair values of our publicly held long-term debt are classified as Level 2 in the fair value hierarchy. The fair values of our special facility bonds were based on quoted market prices in markets with low trading volumes. The fair value of our non-public debt was estimated using a discounted cash flow analysis based on our borrowing rates for instruments with similar terms and therefore classified as Level 3 in the fair value hierarchy. The fair values of our other financial instruments approximate their carrying values. Refer to Note 8 for an explanation of the fair value hierarchy structure. We have financed certain aircraft with Enhanced Equipment Trust Certificates (EETCs) as one of the benefits of this structure is being able to finance several aircraft at one time, rather than individually. The structure of EETC financing is that we create pass-through trusts in order to issue pass-through certificates. The proceeds from the issuance of these certificates are then used to purchase equipment notes which are issued by us and are secured by our aircraft. These trusts meet the definition of a variable interest entity, or VIE, as defined in the Consolidations topic of the Codification, and must be considered for consolidation in our condensed consolidated financial statements. Our assessment of our EETCs considers both quantitative and qualitative factors including the purpose for which these trusts were established and the nature of the risks in each. The main purpose of the trust structure is to enhance the credit worthiness of our debt obligation through certain bankruptcy protection provisions, liquidity facilities and lower our total borrowing cost. We concluded that we are not the primary beneficiary in these trusts because our involvement in them is limited to principal and interest payments on the related notes, the trusts were not set up to pass along variability created by credit risk to us and the likelihood of our defaulting on the notes. Therefore, we have not consolidated these trusts in our condensed consolidated financial statements. Short-term Borrowings Citibank Line of Credit We have a revolving Credit and Guaranty Agreement with Citibank, N.A. as the administrative agent for up to approximately $425 million . The term of the facility runs through April 2021. Borrowings under the Credit and Guaranty Agreement bear interest at a variable rate equal to LIBOR, plus a margin . The Credit and Guaranty Agreement is secured by Slots at John F. Kennedy International Airport, LaGuardia Airport and Reagan National Airport as well as certain other assets. Slots are rights to take-off or land at a specific airport during a specific time during the day and a means by which airport capacity and congestion can be managed. The Credit and Guaranty Agreement includes covenants that require us to maintain certain minimum balances in unrestricted cash, cash equivalents, and unused commitments available under all revolving credit facilities. In addition, the covenants restrict our ability to, among other things, dispose of certain collateral, or merge, consolidate, or sell assets. As of and for the periods ended March 31, 2018 and December 31, 2017 , we did not have a balance outstanding or borrowings under this line of credit. Morgan Stanley Line of Credit We have a revolving line of credit with Morgan Stanley for up to approximately $200 million . This line of credit is secured by a portion of our investment securities held by Morgan Stanley and the amount available to us under this line of credit may vary accordingly. This line of credit bears interest at a floating rate based upon LIBOR, plus a margin . As of and for the periods ended March 31, 2018 and December 31, 2017 , we did not have a balance outstanding or borrowings under this line of credit.

Comprehensive Income (Notes)

Comprehensive Income (Notes)	3 Months Ended
	Mar. 31, 2018
Accumulated Other Comprehensive Income (Loss), Net of Tax [Abstract]
Accumulated Other Comprehensive Income	Accumulated Other Comprehensive Income (Loss) Comprehensive income (loss) includes changes in fair value of our aircraft fuel derivatives which qualify for hedge accounting. A rollforward of the amounts included in the accumulated other comprehensive income (loss), net of taxes for the three months ended March 31, 2018 and March 31, 2017 are as follows (in millions): Aircraft Fuel Derivatives (1) Total Balance of accumulated income at December 31, 2017 $ — $ — Reclassifications into earnings (net of $0 of taxes) — — Change in fair value (net of $0 of taxes) — — Balance of accumulated income at March 31, 2018 $ — $ — Balance of accumulated (losses) income at December 31, 2016 $ 13 $ 13 Reclassifications into earnings (net of $(1) of taxes) (2 ) (2 ) Change in fair value (net of $(4) of taxes) (6 ) (6 ) Balance of accumulated (losses) income at March 31, 2017 $ 5 $ 5 (1) Reclassified to aircraft fuel expense

Earnings Per Share (Notes)

Earnings Per Share (Notes)	3 Months Ended
	Mar. 31, 2018
Earnings Per Share [Abstract]
Schedule of Earnings Per Share, Basic and Diluted	Earnings Per Share Basic earnings per share is calculated by dividing net income by the weighted average number of shares outstanding during the period. Diluted earnings per share is calculated similarly but includes potential dilution from restricted stock units, the Crewmember stock purchase plan, the exercise of stock options and any other potentially dilutive instruments using the treasury stock method. The following is a reconciliation of weighted average shares and a calculation of earnings per share (in millions, except per share amounts): Three Months Ended March 31, 2018 2017 Net Income (1) $ 88 $ 82 Weighted average basic shares 320.6 336.3 Effect of dilutive securities 1.7 1.9 Weighted average diluted shares 322.3 338.2 Earnings per common share Basic $ 0.28 $ 0.25 Diluted 0.27 0.24 (1) As discussed in Note 1, we adopted ASC 606, Revenue from Contracts with Customers during the first quarter of 2018. The adoption of this standard reduced previously reported net income by approximately $3 million for the three months ended March 31, 2017 . On March 1, 2018, JetBlue entered into an accelerated share repurchase, or ASR, agreement with Goldman, Sachs & Co. (“GS&Co.”), paying $125 million for an initial delivery of approximately 4.7 million shares. The term of the ASR concluded on March 23, 2018 with GS&Co. delivering approximately 1.1 million additional shares to JetBlue on March 26, 2018. A total of 5.8 million shares, at an average price of $21.49 per share, were repurchased under the agreement. On March 6, 2017, JetBlue entered into an ASR agreement with Barclays Bank PLC, or Barclays, paying $100 million for an initial delivery of approximately 4.1 million shares. The term of the Barclays ASR concluded on April 24, 2017 with Barclays delivering approximately 0.8 million additional shares to JetBlue on April 27, 2017. A total of 4.9 million shares, at an average price of $20.23 per share, were repurchased under the agreement.

Employee Retirement Plan (Notes

Employee Retirement Plan (Notes)	3 Months Ended
	Mar. 31, 2018
Retirement Benefits [Abstract]
Compensation and Employee Benefit Plans [Text Block]	Crewmember Retirement Plan and Profit Sharing We sponsor a retirement savings 401(k) defined contribution plan, or the Plan, covering all of our Crewmembers where we match 100% of our Crewmembers' contributions up to 5% of their eligible wages. The contributions vest over five years and are measured from a Crewmember's hire date. Crewmembers are immediately vested in their voluntary contributions. Another component of the Plan is a Company discretionary contribution of 5% of eligible non-management Crewmember compensation, which we refer to as Retirement Plus. Retirement Plus contributions vest over three years and are measured from a Crewmember's hire date. Our non-management Crewmembers are eligible to receive profit sharing, calculated as 10% of adjusted pre-tax income before profit sharing and special items up to a pre-tax margin of 18% with the result reduced by Retirement Plus contributions. If JetBlue's resulting pre-tax margin exceeds 18% , non-management Crewmembers will receive 20% profit sharing above an 18% pre-tax margin. Certain Federal Aviation Administration, or FAA-licensed Crewmembers, receive an additional contribution of 3% of eligible compensation, which we refer to as Retirement Advantage. Total 401(k) company match, Retirement Plus, profit sharing and Retirement Advantage expensed for the three months ended March 31, 2018 and 2017 was $41 million and $42 million , respectively.

Commitments and Contingencies (

Commitments and Contingencies (Notes)	3 Months Ended
	Mar. 31, 2018
Commitments and Contingencies Disclosure [Abstract]
Commitments and Contingencies Disclosure [Text Block]	Commitments and Contingencies Flight Equipment Commitments As of March 31, 2018 , our firm aircraft orders consisted of 8 Airbus A321 aircraft, 25 Airbus A320 new engine option (A320neo) aircraft, 60 Airbus A321neo aircraft, 24 Embraer E190 aircraft and 22 spare engines scheduled for delivery through 2024 . Committed expenditures for these aircraft and related flight equipment, including estimated amounts for contractual price escalations and predelivery deposits, will be approximately $679 million for the remainder of 2018 , $1.0 billion in 2019 , $1.4 billion in 2020 , $1.5 billion in 2021 , $1.5 billion in 2022 and $1.2 billion thereafter. We are scheduled to receive 8 new Airbus A321 aircraft during the remainder of 2018. Other Commitments We utilize several credit card processors to process our ticket sales. Our agreements with these processors do not contain covenants, but do generally allow the processor to withhold cash reserves to protect the processor from potential liability for tickets purchased, but not yet used for travel. While we currently do not have any collateral requirements related to our credit card processors, we may be required to issue collateral to our credit card processors, or other key business partners, in the future. As of March 31, 2018 , we had approximately $31 million in assets serving as collateral for letters of credit relating to a certain number of our leases. These are included in restricted cash and expire at the end of the related lease terms. Additionally, we had approximately $27 million pledged related to our workers compensation insurance policies and other business partner agreements which will expire according to the terms of the related policies or agreements. In April 2014, JetBlue pilots elected to be solely represented by the Air Line Pilots Association, or ALPA. The National Mediation Board, or NMB, certified ALPA as the representative body for JetBlue pilots and we are working with ALPA to reach our first collective bargaining agreement. In April 2018, JetBlue Inflight Crewmembers elected to be solely represented by the Transport Workers Union of America, or TWU. The NMB certified the TWU as the representative body for JetBlue Inflight Crewmembers and we anticipate working with the TWU to reach a collective bargaining agreement. Except as noted above, our Crewmembers do not have third party representation. Legal Matters Occasionally we are involved in various claims, lawsuits, regulatory examinations, investigations and other legal matters arising, for the most part, in the ordinary course of business. The outcome of litigation and other legal matters is always uncertain. The Company believes it has valid defenses to the legal matters currently pending against it, is defending itself vigorously and has recorded accruals determined in accordance with GAAP, where appropriate. In making a determination regarding accruals, using available information, we evaluate the likelihood of an unfavorable outcome in legal or regulatory proceedings to which we are a party and record a loss contingency when it is probable a liability has been incurred and the amount of the loss can be reasonably estimated. These subjective determinations are based on the status of such legal or regulatory proceedings, the merits of our defenses and consultation with legal counsel. Actual outcomes of these legal and regulatory proceedings may materially differ from our current estimates. It is possible that resolution of one or more of the legal matters currently pending or threatened could result in losses material to our consolidated results of operations, liquidity or financial condition. To date, none of these types of litigation matters, most of which are typically covered by insurance, has had a material impact on our operations or financial condition. We have insured and continue to insure against most of these types of claims. A judgment on any claim not covered by, or in excess of, our insurance coverage could materially adversely affect our financial condition or results of operations.

Financial Derivative Instrument

Financial Derivative Instruments and Risk Management (Notes)	3 Months Ended
	Mar. 31, 2018
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Financial Derivative Instruments and Risk Management	Financial Derivative Instruments and Risk Management As part of our risk management techniques, we periodically purchase over the counter energy derivative instruments and enter into fixed forward price agreements, or FFPs, to manage our exposure to the effect of changes in the price of aircraft fuel. Prices for the underlying commodities have historically been highly correlated to aircraft fuel, making derivatives of them effective at providing short-term protection against sharp increases in average fuel prices. We also periodically enter into jet fuel basis swaps for the differential between heating oil and jet fuel, to further limit the variability in fuel prices at various locations. In the past, we have periodically entered into interest rate swaps to manage the variability of the cash flows associated with our variable rate debt. We do not hold or issue any derivative financial instruments for trading purposes. Aircraft fuel derivatives We attempt to obtain cash flow hedge accounting treatment for each aircraft fuel derivative that we enter into. This treatment is provided for under the Derivatives and Hedging topic of the Codification which allows for gains and losses on the effective portion of qualifying hedges to be deferred until the underlying planned jet fuel consumption occurs, rather than recognizing the gains and losses on these instruments into earnings during each period they are outstanding. The effective portion of realized aircraft fuel hedging derivative gains and losses is recognized in aircraft fuel expense in the period during which the underlying fuel is consumed. Ineffectiveness occurs, in certain circumstances, when the change in the total fair value of the derivative instrument differs from the change in the value of our expected future cash outlays for the purchase of aircraft fuel. Ineffectiveness is recognized immediately in interest income and other. If a hedge does not qualify for hedge accounting, the periodic changes in its fair value are also recognized in interest income and other. When aircraft fuel is consumed and the related derivative contract settles, any gain or loss previously recorded in other comprehensive income is recognized in aircraft fuel expense. All cash flows related to our fuel hedging derivatives are classified as operating cash flows. Our current approach to fuel hedging is to enter into hedges on a discretionary basis without a specific target of hedge percentage needs. We view our hedge portfolio as a form of insurance to help mitigate the impact of price volatility and protect us against severe spikes in oil prices, when possible. We did not have any fuel hedging contracts, gross or net of offsetting, outstanding as of March 31, 2018 and December 31, 2017 . The table below reflects quantitative information related to our derivative instruments and where these amounts are recorded in our financial statements (dollar amounts in millions): Three Months Ended March 31, 2018 2017 Fuel derivatives Hedge effectiveness (gains) recognized in aircraft fuel expense $ — $ (3 ) (Gains) losses on derivatives not qualifying for hedge accounting recognized in other expense — — Hedge losses on derivatives recognized in comprehensive income — 10 Percentage of actual consumption economically hedged — % 11 % Any outstanding derivative instrument exposes us to credit loss in connection with our fuel contracts in the event of nonperformance by the counterparties to our agreements, but we do not expect that any of our counterparties will fail to meet their obligations. The amount of such credit exposure is generally the fair value of our outstanding contracts for which we are in a receivable position. To manage credit risks we select counterparties based on credit assessments, limit our overall exposure to any single counterparty and monitor the market position with each counterparty. Some of our agreements require cash deposits from either JetBlue or our counterparty if market risk exposure exceeds a specified threshold amount. We have master netting arrangements with our counterparties allowing us the right of offset to mitigate credit risk in derivative transactions. The financial derivative instrument agreements we have with our counterparties may require us to fund all, or a portion of, outstanding loss positions related to these contracts prior to their scheduled maturities. The amount of collateral posted, if any, is periodically adjusted based on the fair value of the hedge contracts. Our policy is to offset the liabilities represented by these contracts with any cash collateral paid to the counterparties.

Fair Value of Financial Instrum

Fair Value of Financial Instruments (Notes)	3 Months Ended
	Mar. 31, 2018
Fair Value Disclosures [Abstract]
Fair Value of Financial Instruments	Fair Value Under the Fair Value Measurements and Disclosures topic of the Codification, disclosures are required about how fair value is determined for assets and liabilities and a hierarchy for which these assets and liabilities must be grouped is established, based on significant levels of inputs as follows: Level 1 quoted prices in active markets for identical assets or liabilities; Level 2 quoted prices in active markets for similar assets and liabilities and inputs that are observable for the asset or liability; or Level 3 unobservable inputs for the asset or liability, such as discounted cash flow models or valuations. The determination of where assets and liabilities fall within this hierarchy is based upon the lowest level of input that is significant to the fair value measurement. The following is a listing of our assets and liabilities required to be measured at fair value on a recurring basis and where they are classified within the fair value hierarchy as of March 31, 2018 and December 31, 2017 (in millions): March 31, 2018 Level 1 Level 2 Level 3 Total Cash equivalents $ 309 $ — $ — $ 309 Available-for-sale investment securities — 75 — 75 December 31, 2017 Level 1 Level 2 Level 3 Total Cash equivalents $ 173 $ — $ — $ 173 Available-for-sale investment securities — 136 — 136 Refer to Note 3 for fair value information related to our outstanding debt obligations as of March 31, 2018 and December 31, 2017 . Cash equivalents Our cash equivalents include money market securities and commercial paper which are readily convertible into cash, have maturities of 90 days or less when purchased and are considered to be highly liquid and easily tradable. These securities are valued using inputs observable in active markets for identical securities and are therefore classified as Level 1 within our fair value hierarchy. Available-for-sale investment securities Included in our available-for-sale investment securities are U.S. treasury bills, time deposits, commercial paper and debt securities. The fair value of these instruments are based on observable inputs in non-active markets, which are therefore classified as Level 2 in the hierarchy. We did not record any significant gains or losses on these securities during the three months ended March 31, 2018 and 2017 .

Revenue Recognition (Notes)

Revenue Recognition (Notes)	3 Months Ended
	Mar. 31, 2018
Revenue from Contract with Customer [Abstract]
Revenue from Contract with Customer [Text Block]	Revenue Recognition Passenger Revenue Passenger ticket and ancillary services are sold in advance of the performance of the travel and related services. We initially defer ticket sales, including deferred revenue on future travel and related services, and for TrueBlue ® points issued when travel services are provided, as air traffic liability. We allocate the transaction price to each performance obligation identified in a passenger ticket on a relative standalone selling price basis. Directly observable selling prices are available for travel segment and ancillary services. Standalone selling price for TrueBlue ® points issued are discussed in the Loyalty Program section below. Passenger revenue, including certain ancillary fees directly related to passenger tickets, is recognized when the transportation is provided. Passenger revenue from unused tickets and passenger credits will be recognized in proportion to flown revenue based on estimates of expected expiration or when the likelihood of the Customer exercising their remaining rights becomes remote. Taxes that we are required to collect from our Customers, including federal transportation taxes, security taxes and airport facility charges, are excluded from the measurement of the transaction price. During the three months ended March 31, 2018 and 2017, we recognized revenue of $496 million and $503 million , respectively, that was included in the contract liabilities at the beginning of the respective periods. We expect the remaining balance of the December 31, 2017 liability to be recognized during 2018. The practical expedient in ASC 606-10-50-14 allows entities not to disclose the amount of the remaining transaction price and its expected timing of recognition for passenger tickets if the contract has an original expected duration of one year or less or if certain other conditions are met. We elected to apply this practical expedient to our contract liabilities relating to passenger travel and ancillary services as our tickets or any related passenger credits expire one year from the date of issuance. Loyalty Program Customers may earn points under our customer loyalty program, TrueBlue ® , based on the value paid for a trip. We identified two performance obligations for passenger ticket sales earning TrueBlue ® points: future travel discussed in the Passenger Revenue section above; and services when the Customers redeem TrueBlue ® points. We allocate the transaction price to each performance obligation on a relative standalone basis. As directly observable selling price for TrueBlue ® points is not available, we determine the standalone selling price of TrueBlue ® points issued using the redemption value approach adjusted to reflect fulfillment discount, or breakage. To maximize the use of observable inputs, we utilized actual ticket value of the tickets purchased with TrueBlue ® points. We record a deferred liability in the amount of the transaction price allocation to TrueBlue ® points as they are issued which is included in our air traffic liabilities. The air transportation element is deferred and recognized as passenger revenue when the points are utilized. TrueBlue points can be sold to participating companies, including credit card and car rental companies. Co-branded credit card partnerships have the following identified performance obligations: air transportation; use of the JetBlue brand name and access to our frequent flyer customer lists; advertising; and other airline benefits. In determining the estimated selling price, JetBlue considered multiple inputs, methods and assumptions, including: discounted cash flows; estimated redemption value, net of fulfillment discount; points expected to be awarded and redeemed; estimated annual spending by cardholders; estimated annual royalty for use of JetBlue's frequent flyer customer lists; and estimated utilization of other airline benefits. The overall consideration received is allocated to each performance obligation based on their standalone relative selling prices.The air transportation element is deferred and recognized as passenger revenue when the points are utilized. The other elements are recognized as other revenue when earned. Points earned by TrueBlue ® members never expire. We estimate breakage for the portion of points not expected to be redeemed based on historical points redemptions. TrueBlue ® members earn points based on the value paid for a trip rather than the length of the trip, and TrueBlue ® members can pool points between small groups of people, branded as Family Pooling™. Breakage is recorded using points redemption patterns to determine a breakage rate. We periodically update breakage rates used to estimate breakage revenue. TrueBlue ® points are combined in one homogeneous pool and are not separately identifiable. As such, the revenue is comprised of the points that were part of the air traffic liability balance at the beginning of the period as well as points that were issued during the period. The table below presents the activity of the current and non-current air traffic liability, and includes points earned and sold to participating companies. Balance at December 31, 2017 $ 502 TrueBlue ® points redeemed (41 ) TrueBlue ® points earned 55 Balance as of March 31, 2018 $ 516 Balance at December 31, 2016 $ 417 TrueBlue ® points redeemed (26 ) TrueBlue ® points earned 40 Balance as of March 31, 2017 $ 431 The timing of our TrueBlue ® point redemptions can vary; however, the majority of our points are redeemed within approximately three years. Disaggregation of Revenue We disaggregate revenue from contracts with Customers by revenue source as we believe it best depicts the nature, amount, timing and uncertainty of our revenue and cash flow. The following tables provide the disaggregation disclosure by type of service for the three months ended March 31, 2018 and 2017 (in millions): Three Months Ended March 31, 2018 2017 Passenger revenue Passenger travel $ 1,651 $ 1,530 Loyalty revenue - air transportation 41 26 Other revenue Loyalty revenue 36 21 Other revenue 26 23 Total revenue $ 1,754 $ 1,600 Contract Liabilities Our contract liabilities consist of advance payments received prior to the transfer of services to the Customer. Net contract liabilities consist of the following (in millions): March 31, 2018 December 31, 2017 Contract liabilities Air traffic liability - passenger travel $ 1,054 $ 836 Air traffic liability - loyalty program (air transportation) 516 502 Deferred revenue 13 13 Total contract liabilities $ 1,583 $ 1,351

Summary of Significant Accoun16

Summary of Significant Accounting Policies (Policies)	3 Months Ended
	Mar. 31, 2018
Accounting Policies [Abstract]
Significant Accounting Policies [Text Block]	Summary of Significant Accounting Policies Basis of Presentation JetBlue Airways Corporation, or JetBlue, provides air transportation services across the United States, the Caribbean and Latin America. Our condensed consolidated financial statements include the accounts of JetBlue and our subsidiaries which are collectively referred to as “we” or the “Company.” All majority-owned subsidiaries are consolidated on a line by line basis, with all intercompany transactions and balances being eliminated. These condensed consolidated financial statements and related notes should be read in conjunction with our 2017 audited financial statements included in our Annual Report on Form 10-K for the year ended December 31, 2017 . These condensed consolidated financial statements are unaudited and have been prepared by us following the rules and regulations of the Securities and Exchange Commission, or the SEC. In our opinion they reflect all adjustments, including normal recurring items, that are necessary to present fairly the results for interim periods. Certain information and footnote disclosures normally included in financial statements prepared in accordance with generally accepted accounting principles in the U.S., or GAAP, have been condensed or omitted as permitted by such rules and regulations; however, we believe that the disclosures are adequate to make the information presented not misleading. Due to seasonal variations in the demand for air travel, the volatility of aircraft fuel prices and other factors, our operating results for the periods presented herein are not necessarily indicative of the results that may be expected for other interim periods or the entire fiscal year. We recasted financial information previously filed under Accounting Standards Codification Topic 605, Revenue Recognition for the periods presented to reflect full retrospective method of transition to ASU 2014-09, Revenue from Contracts with Customers. Investment securities Investment securities consist of available-for-sale investment securities and held-to-maturity investment securities. We use a specific identification method to determine the cost of the securities when they are sold. Held-to-maturity investment securities. The contractual maturities of the held-to-maturity investments we held as of March 31, 2018 were not greater than 24 months. We did not record any significant gains or losses on these securities during the three months ended March 31, 2018 or 2017 . The estimated fair value of these investments approximated their carrying value as of March 31, 2018 and December 31, 2017 , respectively. The carrying values of investment securities consisted of the following at March 31, 2018 and December 31, 2017 (in millions): March 31, 2018 December 31, 2017 Available-for-sale securities Time deposits $ 70 $ 130 Debt securities 5 6 Total available-for-sale securities 75 136 Held-to-maturity securities Treasury notes $ 195 $ 220 Corporate bonds — 36 Total held-to-maturity securities 195 256 Total investment securities $ 270 $ 392 Recent Accounting Pronouncements In May 2014, the FASB issued ASU 2014-09, Revenue from Contracts with Customers topic of the FASB Codification, or Codification, which supersedes existing revenue recognition guidance. Under the new standard, a company will recognize revenue when it transfers goods or services to customers in an amount that reflects the consideration to which the company expects to be entitled to in exchange for those goods or services. We adopted the requirements of ASU 2014-09 as of January 1, 2018 utilizing the full retrospective method of transition. We recorded a $48 million cumulative adjustment to retained earnings as of January 1, 2016, the beginning of the retrospective reporting period, for the impacts of the new accounting standard. The adoption of the new standard did not have a significant impact on earnings. For JetBlue, the most significant impact of the new standard relates to the accounting of our TrueBlue ® Loyalty Program. The new standard eliminated the incremental cost method for loyalty program accounting which we previously used. As a result, we had to revalue the liability for points earned on qualifying JetBlue purchases using a relative fair value approach. The application of a relative fair value approach increased our air traffic liability by approximately $286 million , net of breakage, as of the beginning of the retrospective reporting period. In addition, we had a liability for outstanding points that were earned in conjunction with our previous co-branded credit card agreement that had been recorded using the residual method. The new standard does not permit the usage of the residual method for this contract and instead, the transaction price is now allocated to the performance obligations on a relative selling price basis. This change decreased the relative value allocated to the transportation performance obligation and resulted in a decrease of $159 million , net of breakage, to the liability as of the beginning of the retrospective reporting period. The standard also resulted in a change in the timing and classification of our revenue recognition for certain ancillary fees directly related to passenger tickets. As a result, we reclassified $107 million from other revenue under the prior presentation to passenger revenue for the first quarter of 2017. Refer to Note 2 - Revenue Recognition for more information. During the first quarter of 2018, we adopted ASU 2016-18, Statement of Cash Flows (Topic 230), Restricted Cash of the Codification. The update clarified how entities should present restricted cash and restricted cash equivalents in the statement of cash flows. ASU 2016-18 requires entities to show the changes in the total of cash, cash equivalents, restricted cash and restricted cash equivalents in the statement of cash flows. As a result, entities will no longer present transfers between cash and cash equivalents and restricted cash and restricted cash equivalents in the statement of cash flows. Our condensed consolidated statements of cash flows for the three months ended March 31, 2017 reflects retrospective application. Our cash and cash equivalents include short-term, highly liquid investments which are readily convertible into cash. These investments include money market securities and commercial papers with maturities of three months or less when purchased. Restricted cash primarily consists of security deposits, funds held in escrow for estimated workers' compensation obligations and performance bonds for aircraft and facility leases. During the first quarter of 2018, we adopted ASU 2016-01, Financial Instruments-Overall (Topic 825) . The update made several changes, including the elimination of the available-for-sale classification of equity investments, and requires equity investments with readily determinable fair values to be measured at fair value with changes in fair value recognized in earnings. For equity investments without readily determinable fair values, the standard provides an alternative which allows entities to measure these investments at cost, less any impairment, adjusted for changes from observable price changes in orderly transactions for an identifiable or similar investments of the same issuer. Our wholly-owned subsidiary, JetBlue Technology Ventures, LLC, or JTV, has several equity investments in emerging companies which do not have readily determinable fair values. These investments were accounted for at cost during 2017. Under the updated standard, these investments are now accounted for using the measurement alternative. No gains or losses were recorded for these investments during the three months ended March 31, 2018. As of March 31, 2018, the carrying amount of these investments was $12 million . In February 2016, the FASB issued Accounting Standards Update, or ASU, 2016-02, Leases (Topic 842) of the Codification. Under ASU 2016-02, a lessee will recognize liabilities for lease payments and right-of-use assets representing its right to use the underlying asset for the lease term. While we are still evaluating the full impact of adopting the amendments on our consolidated financial statements and disclosures, we believe the adoption will have a significant impact on our Consolidated Balance Sheets. However, we do not expect ASU 2016-02 to have a significant impact to our Consolidated Statements of Operations. The amendments are effective for fiscal years beginning after December 15, 2018 and include interim periods within those fiscal years.
Cash and Cash Equivalents, Policy [Policy Text Block]	Cash equivalents Our cash equivalents include money market securities and commercial paper which are readily convertible into cash, have maturities of 90 days or less when purchased and are considered to be highly liquid and easily tradable. These securities are valued using inputs observable in active markets for identical securities and are therefore classified as Level 1 within our fair value hierarchy.
Basis of presentation	Basis of Presentation JetBlue Airways Corporation, or JetBlue, provides air transportation services across the United States, the Caribbean and Latin America. Our condensed consolidated financial statements include the accounts of JetBlue and our subsidiaries which are collectively referred to as “we” or the “Company.” All majority-owned subsidiaries are consolidated on a line by line basis, with all intercompany transactions and balances being eliminated. These condensed consolidated financial statements and related notes should be read in conjunction with our 2017 audited financial statements included in our Annual Report on Form 10-K for the year ended December 31, 2017 . These condensed consolidated financial statements are unaudited and have been prepared by us following the rules and regulations of the Securities and Exchange Commission, or the SEC. In our opinion they reflect all adjustments, including normal recurring items, that are necessary to present fairly the results for interim periods. Certain information and footnote disclosures normally included in financial statements prepared in accordance with generally accepted accounting principles in the U.S., or GAAP, have been condensed or omitted as permitted by such rules and regulations; however, we believe that the disclosures are adequate to make the information presented not misleading. Due to seasonal variations in the demand for air travel, the volatility of aircraft fuel prices and other factors, our operating results for the periods presented herein are not necessarily indicative of the results that may be expected for other interim periods or the entire fiscal year. We recasted financial information previously filed under Accounting Standards Codification Topic 605, Revenue Recognition for the periods presented to reflect full retrospective method of transition to ASU 2014-09, Revenue from Contracts with Customers.
Investment securities	Investment securities Investment securities consist of available-for-sale investment securities and held-to-maturity investment securities. We use a specific identification method to determine the cost of the securities when they are sold. Held-to-maturity investment securities. The contractual maturities of the held-to-maturity investments we held as of March 31, 2018 were not greater than 24 months. We did not record any significant gains or losses on these securities during the three months ended March 31, 2018 or 2017 . The estimated fair value of these investments approximated their carrying value as of March 31, 2018 and December 31, 2017 , respectively. The carrying values of investment securities consisted of the following at March 31, 2018 and December 31, 2017 (in millions): March 31, 2018 December 31, 2017 Available-for-sale securities Time deposits $ 70 $ 130 Debt securities 5 6 Total available-for-sale securities 75 136 Held-to-maturity securities Treasury notes $ 195 $ 220 Corporate bonds — 36 Total held-to-maturity securities 195 256 Total investment securities $ 270 $ 392
New Accounting Pronouncements [Policy Text Block]	Recent Accounting Pronouncements In May 2014, the FASB issued ASU 2014-09, Revenue from Contracts with Customers topic of the FASB Codification, or Codification, which supersedes existing revenue recognition guidance. Under the new standard, a company will recognize revenue when it transfers goods or services to customers in an amount that reflects the consideration to which the company expects to be entitled to in exchange for those goods or services. We adopted the requirements of ASU 2014-09 as of January 1, 2018 utilizing the full retrospective method of transition. We recorded a $48 million cumulative adjustment to retained earnings as of January 1, 2016, the beginning of the retrospective reporting period, for the impacts of the new accounting standard. The adoption of the new standard did not have a significant impact on earnings. For JetBlue, the most significant impact of the new standard relates to the accounting of our TrueBlue ® Loyalty Program. The new standard eliminated the incremental cost method for loyalty program accounting which we previously used. As a result, we had to revalue the liability for points earned on qualifying JetBlue purchases using a relative fair value approach. The application of a relative fair value approach increased our air traffic liability by approximately $286 million , net of breakage, as of the beginning of the retrospective reporting period. In addition, we had a liability for outstanding points that were earned in conjunction with our previous co-branded credit card agreement that had been recorded using the residual method. The new standard does not permit the usage of the residual method for this contract and instead, the transaction price is now allocated to the performance obligations on a relative selling price basis. This change decreased the relative value allocated to the transportation performance obligation and resulted in a decrease of $159 million , net of breakage, to the liability as of the beginning of the retrospective reporting period. The standard also resulted in a change in the timing and classification of our revenue recognition for certain ancillary fees directly related to passenger tickets. As a result, we reclassified $107 million from other revenue under the prior presentation to passenger revenue for the first quarter of 2017. Refer to Note 2 - Revenue Recognition for more information. During the first quarter of 2018, we adopted ASU 2016-18, Statement of Cash Flows (Topic 230), Restricted Cash of the Codification. The update clarified how entities should present restricted cash and restricted cash equivalents in the statement of cash flows. ASU 2016-18 requires entities to show the changes in the total of cash, cash equivalents, restricted cash and restricted cash equivalents in the statement of cash flows. As a result, entities will no longer present transfers between cash and cash equivalents and restricted cash and restricted cash equivalents in the statement of cash flows. Our condensed consolidated statements of cash flows for the three months ended March 31, 2017 reflects retrospective application. Our cash and cash equivalents include short-term, highly liquid investments which are readily convertible into cash. These investments include money market securities and commercial papers with maturities of three months or less when purchased. Restricted cash primarily consists of security deposits, funds held in escrow for estimated workers' compensation obligations and performance bonds for aircraft and facility leases. During the first quarter of 2018, we adopted ASU 2016-01, Financial Instruments-Overall (Topic 825) . The update made several changes, including the elimination of the available-for-sale classification of equity investments, and requires equity investments with readily determinable fair values to be measured at fair value with changes in fair value recognized in earnings. For equity investments without readily determinable fair values, the standard provides an alternative which allows entities to measure these investments at cost, less any impairment, adjusted for changes from observable price changes in orderly transactions for an identifiable or similar investments of the same issuer. Our wholly-owned subsidiary, JetBlue Technology Ventures, LLC, or JTV, has several equity investments in emerging companies which do not have readily determinable fair values. These investments were accounted for at cost during 2017. Under the updated standard, these investments are now accounted for using the measurement alternative. No gains or losses were recorded for these investments during the three months ended March 31, 2018. As of March 31, 2018, the carrying amount of these investments was $12 million . In February 2016, the FASB issued Accounting Standards Update, or ASU, 2016-02, Leases (Topic 842) of the Codification. Under ASU 2016-02, a lessee will recognize liabilities for lease payments and right-of-use assets representing its right to use the underlying asset for the lease term. While we are still evaluating the full impact of adopting the amendments on our consolidated financial statements and disclosures, we believe the adoption will have a significant impact on our Consolidated Balance Sheets. However, we do not expect ASU 2016-02 to have a significant impact to our Consolidated Statements of Operations. The amendments are effective for fiscal years beginning after December 15, 2018 and include interim periods within those fiscal years.
Marketable Securities, Available-for-sale Securities, Policy [Policy Text Block]	Available-for-sale investment securities Included in our available-for-sale investment securities are U.S. treasury bills, time deposits, commercial paper and debt securities. The fair value of these instruments are based on observable inputs in non-active markets, which are therefore classified as Level 2 in the hierarchy. We did not record any significant gains or losses on these securities during the three months ended March 31, 2018 and 2017 .

Long-term Debt and Short-term17

Long-term Debt and Short-term Borrowings Short-Term Borrowings (Policies)	3 Months Ended
	Mar. 31, 2018
Short-Term Borrowing Disclosure [Abstract]
Short-term Debt [Text Block]	Short-term Borrowings Citibank Line of Credit We have a revolving Credit and Guaranty Agreement with Citibank, N.A. as the administrative agent for up to approximately $425 million . The term of the facility runs through April 2021. Borrowings under the Credit and Guaranty Agreement bear interest at a variable rate equal to LIBOR, plus a margin . The Credit and Guaranty Agreement is secured by Slots at John F. Kennedy International Airport, LaGuardia Airport and Reagan National Airport as well as certain other assets. Slots are rights to take-off or land at a specific airport during a specific time during the day and a means by which airport capacity and congestion can be managed. The Credit and Guaranty Agreement includes covenants that require us to maintain certain minimum balances in unrestricted cash, cash equivalents, and unused commitments available under all revolving credit facilities. In addition, the covenants restrict our ability to, among other things, dispose of certain collateral, or merge, consolidate, or sell assets. As of and for the periods ended March 31, 2018 and December 31, 2017 , we did not have a balance outstanding or borrowings under this line of credit. Morgan Stanley Line of Credit We have a revolving line of credit with Morgan Stanley for up to approximately $200 million . This line of credit is secured by a portion of our investment securities held by Morgan Stanley and the amount available to us under this line of credit may vary accordingly. This line of credit bears interest at a floating rate based upon LIBOR, plus a margin . As of and for the periods ended March 31, 2018 and December 31, 2017 , we did not have a balance outstanding or borrowings under this line of credit.

Revenue Recognition Passenger R

Revenue Recognition Passenger Revenue (Policies)	3 Months Ended
	Mar. 31, 2018
Revenue from Contract with Customer [Abstract]
Passenger Revenues [Policy Text Block]	Passenger Revenue Passenger ticket and ancillary services are sold in advance of the performance of the travel and related services. We initially defer ticket sales, including deferred revenue on future travel and related services, and for TrueBlue ® points issued when travel services are provided, as air traffic liability. We allocate the transaction price to each performance obligation identified in a passenger ticket on a relative standalone selling price basis. Directly observable selling prices are available for travel segment and ancillary services. Standalone selling price for TrueBlue ® points issued are discussed in the Loyalty Program section below. Passenger revenue, including certain ancillary fees directly related to passenger tickets, is recognized when the transportation is provided. Passenger revenue from unused tickets and passenger credits will be recognized in proportion to flown revenue based on estimates of expected expiration or when the likelihood of the Customer exercising their remaining rights becomes remote. Taxes that we are required to collect from our Customers, including federal transportation taxes, security taxes and airport facility charges, are excluded from the measurement of the transaction price. During the three months ended March 31, 2018 and 2017, we recognized revenue of $496 million and $503 million , respectively, that was included in the contract liabilities at the beginning of the respective periods. We expect the remaining balance of the December 31, 2017 liability to be recognized during 2018. The practical expedient in ASC 606-10-50-14 allows entities not to disclose the amount of the remaining transaction price and its expected timing of recognition for passenger tickets if the contract has an original expected duration of one year or less or if certain other conditions are met. We elected to apply this practical expedient to our contract liabilities relating to passenger travel and ancillary services as our tickets or any related passenger credits expire one year from the date of issuance.

Revenue Recognition Loyalty Pro

Revenue Recognition Loyalty Program (Policies)	3 Months Ended
	Mar. 31, 2018
Revenue from Contract with Customer [Abstract]
Revenue Recognition, Loyalty Programs [Policy Text Block]	Loyalty Program Customers may earn points under our customer loyalty program, TrueBlue ® , based on the value paid for a trip. We identified two performance obligations for passenger ticket sales earning TrueBlue ® points: future travel discussed in the Passenger Revenue section above; and services when the Customers redeem TrueBlue ® points. We allocate the transaction price to each performance obligation on a relative standalone basis. As directly observable selling price for TrueBlue ® points is not available, we determine the standalone selling price of TrueBlue ® points issued using the redemption value approach adjusted to reflect fulfillment discount, or breakage. To maximize the use of observable inputs, we utilized actual ticket value of the tickets purchased with TrueBlue ® points. We record a deferred liability in the amount of the transaction price allocation to TrueBlue ® points as they are issued which is included in our air traffic liabilities. The air transportation element is deferred and recognized as passenger revenue when the points are utilized. TrueBlue points can be sold to participating companies, including credit card and car rental companies. Co-branded credit card partnerships have the following identified performance obligations: air transportation; use of the JetBlue brand name and access to our frequent flyer customer lists; advertising; and other airline benefits. In determining the estimated selling price, JetBlue considered multiple inputs, methods and assumptions, including: discounted cash flows; estimated redemption value, net of fulfillment discount; points expected to be awarded and redeemed; estimated annual spending by cardholders; estimated annual royalty for use of JetBlue's frequent flyer customer lists; and estimated utilization of other airline benefits. The overall consideration received is allocated to each performance obligation based on their standalone relative selling prices.The air transportation element is deferred and recognized as passenger revenue when the points are utilized. The other elements are recognized as other revenue when earned. Points earned by TrueBlue ® members never expire. We estimate breakage for the portion of points not expected to be redeemed based on historical points redemptions. TrueBlue ® members earn points based on the value paid for a trip rather than the length of the trip, and TrueBlue ® members can pool points between small groups of people, branded as Family Pooling™. Breakage is recorded using points redemption patterns to determine a breakage rate. We periodically update breakage rates used to estimate breakage revenue. TrueBlue ® points are combined in one homogeneous pool and are not separately identifiable. As such, the revenue is comprised of the points that were part of the air traffic liability balance at the beginning of the period as well as points that were issued during the period. The table below presents the activity of the current and non-current air traffic liability, and includes points earned and sold to participating companies. Balance at December 31, 2017 $ 502 TrueBlue ® points redeemed (41 ) TrueBlue ® points earned 55 Balance as of March 31, 2018 $ 516 Balance at December 31, 2016 $ 417 TrueBlue ® points redeemed (26 ) TrueBlue ® points earned 40 Balance as of March 31, 2017 $ 431 The timing of our TrueBlue ® point redemptions can vary; however, the majority of our points are redeemed within approximately three years.

Summary of Significant Accoun20

Summary of Significant Accounting Policies (Tables)	3 Months Ended
	Mar. 31, 2018
Accounting Policies [Abstract]
Schedule of marketable securities	The carrying values of investment securities consisted of the following at March 31, 2018 and December 31, 2017 (in millions): March 31, 2018 December 31, 2017 Available-for-sale securities Time deposits $ 70 $ 130 Debt securities 5 6 Total available-for-sale securities 75 136 Held-to-maturity securities Treasury notes $ 195 $ 220 Corporate bonds — 36 Total held-to-maturity securities 195 256 Total investment securities $ 270 $ 392

Long-term Debt and Short-term21

Long-term Debt and Short-term Borrowings (Tables)	3 Months Ended
	Mar. 31, 2018
Debt Disclosure [Abstract]
Schedule of Long Term Debt	The carrying amounts and estimated fair values of our long-term debt (excluding capital lease obligation) at March 31, 2018 and December 31, 2017 were as follows (in millions): March 31, 2018 December 31, 2017 Carrying Value Estimated Fair Value Carrying Value Estimated Fair Value Public Debt Fixed rate special facility bonds, due through 2036 $ 42 $ 45 $ 42 $ 46 Non-Public Debt Fixed rate enhanced equipment notes, due through 2023 159 163 169 178 Floating rate equipment notes, due through 2025 146 152 152 159 Fixed rate equipment notes, due through 2026 679 715 712 771 Total (1) $ 1,026 $ 1,075 $ 1,075 $ 1,154

Comprehensive Income (Tables)

Comprehensive Income (Tables)	3 Months Ended
	Mar. 31, 2018
Accumulated Other Comprehensive Income (Loss), Net of Tax [Abstract]
Accumulated Other Comprehensive Income (Loss), Net of Tax	A rollforward of the amounts included in the accumulated other comprehensive income (loss), net of taxes for the three months ended March 31, 2018 and March 31, 2017 are as follows (in millions): Aircraft Fuel Derivatives (1) Total Balance of accumulated income at December 31, 2017 $ — $ — Reclassifications into earnings (net of $0 of taxes) — — Change in fair value (net of $0 of taxes) — — Balance of accumulated income at March 31, 2018 $ — $ — Balance of accumulated (losses) income at December 31, 2016 $ 13 $ 13 Reclassifications into earnings (net of $(1) of taxes) (2 ) (2 ) Change in fair value (net of $(4) of taxes) (6 ) (6 ) Balance of accumulated (losses) income at March 31, 2017 $ 5 $ 5

Earnings Per Share (Tables)

Earnings Per Share (Tables)	3 Months Ended
	Mar. 31, 2018
Earnings Per Share [Abstract]
Schedule of Earnings Per Share, Basic and Diluted	Earnings Per Share Basic earnings per share is calculated by dividing net income by the weighted average number of shares outstanding during the period. Diluted earnings per share is calculated similarly but includes potential dilution from restricted stock units, the Crewmember stock purchase plan, the exercise of stock options and any other potentially dilutive instruments using the treasury stock method. The following is a reconciliation of weighted average shares and a calculation of earnings per share (in millions, except per share amounts): Three Months Ended March 31, 2018 2017 Net Income (1) $ 88 $ 82 Weighted average basic shares 320.6 336.3 Effect of dilutive securities 1.7 1.9 Weighted average diluted shares 322.3 338.2 Earnings per common share Basic $ 0.28 $ 0.25 Diluted 0.27 0.24 (1) As discussed in Note 1, we adopted ASC 606, Revenue from Contracts with Customers during the first quarter of 2018. The adoption of this standard reduced previously reported net income by approximately $3 million for the three months ended March 31, 2017 . On March 1, 2018, JetBlue entered into an accelerated share repurchase, or ASR, agreement with Goldman, Sachs & Co. (“GS&Co.”), paying $125 million for an initial delivery of approximately 4.7 million shares. The term of the ASR concluded on March 23, 2018 with GS&Co. delivering approximately 1.1 million additional shares to JetBlue on March 26, 2018. A total of 5.8 million shares, at an average price of $21.49 per share, were repurchased under the agreement. On March 6, 2017, JetBlue entered into an ASR agreement with Barclays Bank PLC, or Barclays, paying $100 million for an initial delivery of approximately 4.1 million shares. The term of the Barclays ASR concluded on April 24, 2017 with Barclays delivering approximately 0.8 million additional shares to JetBlue on April 27, 2017. A total of 4.9 million shares, at an average price of $20.23 per share, were repurchased under the agreement.
Schedule of Earnings Per Share, Basic and Diluted [Table Text Block]	The following is a reconciliation of weighted average shares and a calculation of earnings per share (in millions, except per share amounts): Three Months Ended March 31, 2018 2017 Net Income (1) $ 88 $ 82 Weighted average basic shares 320.6 336.3 Effect of dilutive securities 1.7 1.9 Weighted average diluted shares 322.3 338.2 Earnings per common share Basic $ 0.28 $ 0.25 Diluted 0.27 0.24

Financial Derivative Instrume24

Financial Derivative Instruments and Risk Management (Tables)	3 Months Ended
	Mar. 31, 2018
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Derivative instrument in statement of financial position and financial performance	The table below reflects quantitative information related to our derivative instruments and where these amounts are recorded in our financial statements (dollar amounts in millions): Three Months Ended March 31, 2018 2017 Fuel derivatives Hedge effectiveness (gains) recognized in aircraft fuel expense $ — $ (3 ) (Gains) losses on derivatives not qualifying for hedge accounting recognized in other expense — — Hedge losses on derivatives recognized in comprehensive income — 10 Percentage of actual consumption economically hedged — % 11 %

Fair Value of Financial Instr25

Fair Value of Financial Instruments (Tables)	3 Months Ended
	Mar. 31, 2018
Fair Value Disclosures [Abstract]
Fair value, by balance sheet grouping	The following is a listing of our assets and liabilities required to be measured at fair value on a recurring basis and where they are classified within the fair value hierarchy as of March 31, 2018 and December 31, 2017 (in millions): March 31, 2018 Level 1 Level 2 Level 3 Total Cash equivalents $ 309 $ — $ — $ 309 Available-for-sale investment securities — 75 — 75 December 31, 2017 Level 1 Level 2 Level 3 Total Cash equivalents $ 173 $ — $ — $ 173 Available-for-sale investment securities — 136 — 136 Refer to Note 3 for fair value information related to our outstanding debt obligations as of March 31, 2018 and December 31, 2017 .

Revenue Recognition (Tables)

Revenue Recognition (Tables)	3 Months Ended
	Mar. 31, 2018
Disaggregation of Revenue [Line Items]
Disaggregation of Revenue [Table Text Block]	The following tables provide the disaggregation disclosure by type of service for the three months ended March 31, 2018 and 2017 (in millions): Three Months Ended March 31, 2018 2017 Passenger revenue Passenger travel $ 1,651 $ 1,530 Loyalty revenue - air transportation 41 26 Other revenue Loyalty revenue 36 21 Other revenue 26 23 Total revenue $ 1,754 $ 1,600
Contract with Customer, Asset and Liability [Table Text Block]	Net contract liabilities consist of the following (in millions): March 31, 2018 December 31, 2017 Contract liabilities Air traffic liability - passenger travel $ 1,054 $ 836 Air traffic liability - loyalty program (air transportation) 516 502 Deferred revenue 13 13 Total contract liabilities $ 1,583 $ 1,351 The table below presents the activity of the current and non-current air traffic liability, and includes points earned and sold to participating companies. Balance at December 31, 2017 $ 502 TrueBlue ® points redeemed (41 ) TrueBlue ® points earned 55 Balance as of March 31, 2018 $ 516 Balance at December 31, 2016 $ 417 TrueBlue ® points redeemed (26 ) TrueBlue ® points earned 40 Balance as of March 31, 2017 $ 431

Summary of Significant Accoun27

Summary of Significant Accounting Policies (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017	Dec. 31, 2017	Jan. 01, 2016
Schedule of Available-for-sale Securities [Line Items]
Held-to-maturity Securities, Gross Gains (Losses), Derivatives	$ 0	$ 0
Cumulative Effect of New Accounting Principle in Period of Adoption				$ 48
Change to Air Traffic Liability - Elimination of Cost Method for Loyalty Accounting				286
Change to Air Traffic Liability - Elimination of Residual Method				$ 159
Available-for-sale securities
Available-for-sale investment securities	75		$ 136
Held-to-maturity securities
Held-to-maturity securities	195		256
Marketable securities	270		392
Passenger		$ 107
Unrealized Gain (Loss) on Investments	0
Cost Method Investments - JetBlue Tech Ventures	12
Bank Time Deposits [Member]
Available-for-sale securities
Available-for-sale investment securities	70		130
US Treasury Bill Securities [Member]
Available-for-sale securities
Available-for-sale investment securities	5		6
US Treasury Securities [Member]
Held-to-maturity securities
Held-to-maturity securities	0		36
Corporate Bond Securities [Member]
Held-to-maturity securities
Held-to-maturity securities	$ 195		$ 220

Summary of Significant Accoun28

Summary of Significant Accounting Policies Held-to-Maturity Gains (Loss) (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Investments, Debt and Equity Securities [Abstract]
Held-to-maturity Securities, Gross Gains (Losses), Derivatives	$ 0	$ 0

Long-term Debt and Short-term29

Long-term Debt and Short-term Borrowings (Details)	3 Months Ended
	Mar. 31, 2018USD ($)aircraft	Dec. 31, 2017USD ($)
Debt Instrument [Line Items]
Reduction in outstanding debt and capital lease obligations	$ 58,000,000
Value of aircraft, engines and other equipment and facilities which were pledged as security under various loan agreements	$ 2,300,000,000
Unencumbered spare engine | aircraft	37
Long-term Debt, Maturities, Repayments of Principal, Remainder of Fiscal Year	$ 138,000,000
Long-term debt, maturities, repayments of principal in Year Two	215,000,000
Long-term debt, maturities, repayments of principal in Year Three	179,000,000
Long-term debt, maturities, repayments of principal in Year Four	164,000,000
Long-term debt, maturities, repayments of principal in Year Five	142,000,000
Long-term debt, maturities, repayments of principal after Year Five	305,000,000
Capital Lease Obligations	117,000,000	$ 124,000,000
Carrying amounts and estimated fair values of long-term debt
Carrying Value, Total	1,026,000,000	1,075,000,000
Estimated Fair Value, Total	1,075,000,000	1,154,000,000
Public Debt Fixed Rate Special Facility Bonds Due Through Two Thousand Thirty Six [Member]
Carrying amounts and estimated fair values of long-term debt
Carrying Value, Total	42,000,000	42,000,000
Estimated Fair Value, Total	45,000,000	46,000,000
Non Public Debt Fixed Rate Enhanced Equipment Notes Due Through Two Thousand And Twenty Three [Member]
Carrying amounts and estimated fair values of long-term debt
Carrying Value, Total	159,000,000	169,000,000
Estimated Fair Value, Total	163,000,000	178,000,000
Non Public Debt Floating Rate Equipment Notes Due Through Two Thousand And Twenty Five [Member]
Carrying amounts and estimated fair values of long-term debt
Carrying Value, Total	146,000,000	152,000,000
Estimated Fair Value, Total	152,000,000	159,000,000
Non Public Debt Fixed Rate Equipment Notes Due Through Two Thousand Twenty Six [Member]
Carrying amounts and estimated fair values of long-term debt
Carrying Value, Total	679,000,000	712,000,000
Estimated Fair Value, Total	$ 715,000,000	771,000,000
A-320-200 [Member]
Debt Instrument [Line Items]
unencumbered aircraft | aircraft	78
A-321 [Member]
Debt Instrument [Line Items]
unencumbered aircraft | aircraft	46
E-190 [Member]
Debt Instrument [Line Items]
unencumbered aircraft | aircraft	1
Citibank [Member]
Carrying amounts and estimated fair values of long-term debt
Line of Credit, Current	$ 0	$ 0
London Interbank Offered Rate (LIBOR) [Member] | Citibank [Member] | Line of Credit [Member]
Debt Instrument [Line Items]
Debt Instrument, Description of Variable Rate Basis	LIBOR, plus a margin

Long-term Debt and Short-term30

Long-term Debt and Short-term Borrowings Short-term Borrowings (Details) - USD ($)	3 Months Ended
	Mar. 31, 2018	Dec. 31, 2017
Citibank [Member]
Line of Credit Facility [Line Items]
Line of Credit, Current	$ 0	$ 0
Line of Credit Facility, Maximum Borrowing Capacity	425,000,000
Morgan Stanley [Member]
Line of Credit Facility [Line Items]
Line of Credit, Current	0	$ 0
Line of Credit Facility, Maximum Borrowing Capacity	$ 200,000,000
London Interbank Offered Rate (LIBOR) [Member] | Line of Credit [Member] | Citibank [Member]
Line of Credit Facility [Line Items]
Debt Instrument, Description of Variable Rate Basis	LIBOR, plus a margin
London Interbank Offered Rate (LIBOR) [Member] | Line of Credit [Member] | Morgan Stanley [Member]
Line of Credit Facility [Line Items]
Debt Instrument, Description of Variable Rate Basis	LIBOR, plus a margin

Comprehensive Income (Details)

Comprehensive Income (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Accumulated Other Comprehensive Income Loss [Line Items]
Beginning accumulated gains (losses)	$ 0	$ 13
Reclassifications into earnings	0	(2)
Change in fair value	0	(6)
Ending accumulated losses	0	5
Fuel Derivatives [Member]
Accumulated Other Comprehensive Income Loss [Line Items]
Beginning accumulated gains (losses)	0	13
Reclassifications into earnings	0	(2)
Change in fair value	0	(6)
Ending accumulated losses	$ 0	$ 5

Accumulated Other Comprehensive

Accumulated Other Comprehensive Income (Loss) (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017	Dec. 31, 2017	Dec. 31, 2016
Derivative [Line Items]
Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI on Derivatives, Net of Tax	$ 0	$ (2)
Other Comprehensive Income (Loss), Unrealized Gain (Loss) on Derivatives Arising During Period, Net of Tax	0	(6)
Accumulated Other Comprehensive Income (Loss), Net of Tax	0	5	$ 0	$ 13
Reclassifications into earnings, tax	0	(1)
Change in fair value, tax	0	(4)
Fuel Derivatives [Member]
Derivative [Line Items]
Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI on Derivatives, Net of Tax	0	(2)
Other Comprehensive Income (Loss), Unrealized Gain (Loss) on Derivatives Arising During Period, Net of Tax	0	(6)
Accumulated Other Comprehensive Income (Loss), Net of Tax	$ 0	$ 5	$ 0	$ 13

Earnings Per Share (Details)

Earnings Per Share (Details) - USD ($) $ / shares in Units, $ in Millions	Mar. 02, 2018	Mar. 07, 2017	Mar. 23, 2018	Mar. 23, 2018	Apr. 24, 2017	Apr. 24, 2017	Mar. 31, 2018	Mar. 31, 2017
Numerator:
Net Income							$ 88	$ 82
Denominator:
Weighted average basic shares							320,600,000	336,300,000
Effect of dilutive securities:
Effect of dilutive securities							1,700,000	1,900,000
Weighted average diluted shares							322,300,000	338,200,000
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
New Accounting Pronouncement or Change in Accounting Principle, Effect of Change on Net Income								$ 3
Shares excluded from EPS calculation (in millions):
Accelerated Share Repurchases, Settlement (Payment) or Receipt	$ 125	$ 100
Treasury Stock, Shares, Acquired	4,743,833	4,121,586	5,815,762	1,071,929	4,943,178	821,592
Accelerated Share Repurchases, Final Price Paid Per Share			$ 21.4933142037		$ 20.2299006833
Earnings Per Share, Basic							$ 0.28	$ 0.25
Earnings Per Share, Diluted							$ 0.27	$ 0.24

Employee Retirement Plan (Detai

Employee Retirement Plan (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Retirement Benefits [Abstract]
Defined Contribution Plan, Employer Matching Contribution, Percent of Match	100.00%
Employee Retirement Plan (Textuals) [Abstract]
Percentage of employees' gross pay for which the employer contributes a matching contribution to the Plan.	5.00%
Defined Contribution Plan Requisite Service Period For Vesting	5 years
Percentage of employees' gross pay for which the employer can contribute a discretionary profit sharing contribution to the Plan.	5.00%
Retirement Plus Contribution Plan Requisite Service Period for Vesting	3 years
Percentage of Eligible Pre-tax Profits the Company Contributes to Profit Sharing until the Pre-tax Margin is 18%	10.00%
Profit Sharing Calculation Trigger, Pretax Margin	18.00%
Percentage of Eligible Pre-tax Profits the Company Contributes to Profit Sharing when Pre-tax Margin is above 18%	20.00%
Percentage of FAA licensed employees gross pay for which ER can contribute discretionary profit sharing contribution to plan	3.00%
Contribution to employee retirement plan	$ 41	$ 42

Commitments and Contingencies35

Commitments and Contingencies (Details) $ in Millions	Mar. 31, 2018USD ($)aircraft
Unrecorded Unconditional Purchase Obligation [Line Items]
Unrecorded Unconditional Purchase Obligation, Due in Remainder of Fiscal Year	$ 679
Unrecorded Unconditional Purchase Obligation, Due within Two Years	1,000
Unrecorded Unconditional Purchase Obligation, Due within Three Years	1,400
Unrecorded Unconditional Purchase Obligation, Due within Four Years	1,500
Unrecorded Unconditional Purchase Obligation, Due within Five Years	1,500
Unrecorded Unconditional Purchase Obligation, Due after Five Years	1,200
Restricted assets pledged under letter of credit	31
Restricted Assets Pledged Related To Workers Compensation Insurance Policies And Other Business Partner Agreements	$ 27
A-321 [Member]
Unrecorded Unconditional Purchase Obligation [Line Items]
Unrecorded Unconditional Purchase Obligations Disclosure | aircraft	8
Number Of Aircraft Scheduled To Receive | aircraft	8
A-320-Neo [Member]
Unrecorded Unconditional Purchase Obligation [Line Items]
Unrecorded Unconditional Purchase Obligations Disclosure | aircraft	25
A-321 Neo [Member]
Unrecorded Unconditional Purchase Obligation [Line Items]
Unrecorded Unconditional Purchase Obligations Disclosure | aircraft	60
E-190 [Member]
Unrecorded Unconditional Purchase Obligation [Line Items]
Unrecorded Unconditional Purchase Obligations Disclosure | aircraft	24
Spare Engines [Member]
Unrecorded Unconditional Purchase Obligation [Line Items]
Unrecorded Unconditional Purchase Obligations Disclosure | aircraft	22

Financial Derivative Instrume36

Financial Derivative Instruments and Risk Management (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017	Dec. 31, 2017
Derivative [Line Items]
Percentage Fuel Hedged	$ 0		$ 0
Interest expense	$ (22)	$ (25)

Financial Derivative Instrume37

Financial Derivative Instruments and Risk Management (Details 2) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Derivatives, Fair Value [Line Items]
Interest Expense	$ 22	$ 25

Financial Derivative Instrume38

Financial Derivative Instruments and Risk Management - Hedging Effectiveness (Details 3) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Other income (expense) [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Derivative Instruments Not Designated as Hedging Instruments, Gain (Loss), Net	$ 0	$ 0
Fuel derivatives [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Percentage of actual consumption hedged	0.00%	11.00%
Fuel derivatives [Member] | Aircraft Fuel Expense [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Hedge losses recognized	$ 0	$ (3)
Fuel derivatives [Member] | Comprehensive Income [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Percentage of actual consumption economically hedged	$ 0	$ 10

Fair Value of Financial Instr39

Fair Value of Financial Instruments (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017	Dec. 31, 2017
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale Securities, Gross Unrealized Gain (Loss)	$ 0	$ 0
Assets
Available-for-sale investment securities	75		$ 136
Fair Value, Measurements, Recurring [Member]
Assets
Cash equivalents	309		173
Available-for-sale investment securities	75		136
Fair Value, Measurements, Recurring [Member] | Level 1 [Member]
Assets
Cash equivalents	309		173
Available-for-sale investment securities	0		0
Fair Value, Measurements, Recurring [Member] | Level 2 [Member]
Assets
Cash equivalents	0		0
Available-for-sale investment securities	75		136
Fair Value, Measurements, Recurring [Member] | Level 3 [Member]
Assets
Cash equivalents	0		0
Available-for-sale investment securities	$ 0		$ 0

Revenue Recognition (Details)

Revenue Recognition (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017	Dec. 31, 2017	Dec. 31, 2016
Disaggregation of Revenue [Line Items]
Expected Time Points are Expected to be Redeemed (Years)	3 years
Total Revenue Recognized from Contract Liabilities	$ 496	$ 503
Air Traffic Liability - Passenger Travel	1,054		$ 836
Passenger Travel Revenue	1,651	1,530
Passenger Revenue - Loyalty Air Travel	41	26
Other Revenue - Loyalty	36	21
Other Revenue - Non Loyalty	26	23
Sales Revenue, Services, Net	1,754	1,600
Air Traffic Liability - Loyalty Program (Air Transportation)	516		502
Other Deferred Revenue	13		13
Total Contract Liabilities	1,583		1,351
Air Traffic Liability	516	431	$ 502	$ 417
Increase (Decrease) in Air Traffic Liability	(41)	(26)
Increase (Decrease) to Air Traffic Liability - Points Earned	$ 55	$ 40

Uncategorized Items - jblu-2018

Label	Element	Value
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents	us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	$ 495,000,000
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents	us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	$ 359,000,000