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v3.19.3.a.u2

Quarterly Financial Data (Unaudited) (Details Textual 2) - $ / shares | 3 Months Ended
--- | ---
Dec. 31, 2018 | Sep. 30, 2018 | Mar. 31, 2018
Property, Plant and Equipment [Line Items] |  |  |
Tax Cuts and Jobs Act, Earnings Per Share, Diluted, Pro Forma Adjustment | $ 0.06 | $ 0.01 | $ 0.02

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- Definition Tax Cuts and Jobs Act, Earnings Per Share, Diluted, Pro Forma Adjustment + References No definition available. + Details
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Namespace Prefix: | jblu_
Data Type: | num:perShareItemType
Balance Type: | na
Period Type: | duration

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- Definition 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. + References No definition available. + Details
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Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration