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Percentage of voting interests to be acquired for business combination minimum.

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Period for shares issuance following the departure of director.

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Amount of expense for award under share-based payment arrangement. Excludes amount capitalized.

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Discount rate from fair value on purchase date that participants pay for shares.

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The number of grants made during the period on other than stock (or unit) option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, performance target plan).

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The number of non-vested equity-based payment instruments, excluding stock (or unit) options, that validly exist and are outstanding as of the balance sheet date.

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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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The highest percentage of annual salary that an employee is permitted to utilize with respect to the plan.

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Number of additional shares authorized for issuance under share-based payment arrangement.

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Number of shares authorized for issuance under share-based payment arrangement.

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Per share weighted-average price paid for shares purchased on open market for issuance under share-based payment arrangement.

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Intrinsic value of vested award under share-based payment arrangement. Excludes share and unit options.

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Number of shares issued during the period as a result of an employee stock purchase plan.

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Share-Based Compensation - Narrative (Details) - USD ($) $ / shares in Units, $ in Millions	1 Months Ended		12 Months Ended
	May 31, 2024	May 31, 2023	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022	May 31, 2020	May 14, 2020
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Unrecognized stock-based compensation expense			$ 35
Number of years expected to recognize stock-based compensation			19 months
Share-based payment arrangement, expense			$ 39	$ 39	$ 30
Share-based compensation arrangement by Share-based payment award, number of shares authorized (in shares)							10,500,000
Shares issued following the director's departure from the board			6 months 1 day
CSPP offering period			6 months
Outstanding voting securities			50.00%
Exercise price of purchasing rights as percentage of fair market value per share in case of acquisition			85.00%
Restricted Stock Unit Activity Under 2020 Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Unvested restricted stock units (in shares)			7,000,000	6,000,000
Granted (in shares)			4,000,000
Crewmember Stock Purchase Plan 2011
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Employees contribution towards purchase of common stock			10.00%
Purchase price discount based upon the stock price			15.00%
Employee stock purchase plan (ESPP), expense			$ 11	$ 9	$ 9
Stock issued under crewmember stock purchase plan (in shares)			12,200,000	11,200,000	6,400,000
Share-based compensation arrangement by share-based payment award, per share weighted average price of shares purchased (in dollars per share)			$ 4.90	$ 4.67	$ 8.07
JetBlue Airways Corporation 2020 Crewmember Stock Purchase Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based compensation arrangement by Share-based payment award, number of shares authorized (in shares)			52,500,000			17,500,000
Share-based compensation arrangement by share-based payment award, number of additional shares authorized (in shares)	25,000,000	10,000,000
2020 Omnibus Equity Incentive Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based compensation arrangement by Share-based payment award, number of shares authorized (in shares)			35,500,000
Share-based compensation arrangement by share-based payment award, number of additional shares authorized (in shares)	15,000,000	10,000,000
Restricted Stock Units (RSUs)
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Unvested restricted stock units (in shares)			8,600,000
Restricted Stock Units (RSUs) \| Restricted Stock Unit Activity Under 2020 Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based compensation aggregate intrinsic value, vested			$ 16
Deferred Stock Units (DSU's)
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Minimum vesting period			1 year
Maximum vesting period			3 years
Performance Shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Granted (in shares)			1,500,000	1,800,000	0