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Revenue Recognition - Current And Non-Current Air Traffic Liability (Details) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2024 | Dec. 31, 2023
Revenue From Contract With Customer [Roll Forward] |  |
Beginning balance | $ 1,072 | $ 1,000
TrueBlue® points redeemed passenger | (634) | (605)
TrueBlue® points earned and sold | 713 | 701
TrueBlue® points redeemed other | (26) | (24)
Ending balance | $ 1,125 | $ 1,072

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- Definition Air Traffic Liability - Loyalty Program (Air Transportation) + References No definition available. + Details
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Namespace Prefix: | jblu_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

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- Definition Increase (Decrease) to Air Traffic Liability - Points Other + References No definition available. + Details
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Namespace Prefix: | jblu_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

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- Definition Increase (decrease) to Air Traffic Liability due to points redeemed + References No definition available. + Details
Name: | jblu_IncreaseDecreaseToAirTrafficLiabilityPointsRedeemedPassenger
Namespace Prefix: | jblu_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

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- Definition Increase (decrease) to Air Traffic Liability due to points earned + References No definition available. + Details
Name: | jblu_IncreaseDecreasetoAirTrafficLiabilityPointsEarned
Namespace Prefix: | jblu_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

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- Definition Revenue From Contract With Customer + References No definition available. + Details
Name: | jblu_RevenueFromContractWithCustomerRollForward
Namespace Prefix: | jblu_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration