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Revenue Recognition - Current And Non-Current Air Traffic Liability (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Revenue From Contract With Customer [Roll Forward]
Beginning balance	$ 891	$ 733
TrueBlue® points redeemed	(113)	(45)
TrueBlue® points earned and sold	134	70
Ending balance	$ 912	$ 758

X

- Definition

Value of revenue deferred or cost to provide future products or services, primarily air transportation, associated with programs used by airlines to encourage passenger loyalty by providing rewards geared to the frequency of travel on the sponsoring airline, typically in the form of frequent flyer miles, points, or segments that can be accumulated and converted into free or discounted travel or other redemption options.

+ References

No definition available.

+ Details

Name:	jblu_AirTrafficLiability
Namespace Prefix:	jblu_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

X

- 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

X

- Definition

Increase (decrease) to Air Traffic Liability due to points redeemed

+ References

No definition available.

+ Details

Name:	jblu_IncreaseDecreasetoAirTrafficLiabilityPointsRedeemed
Namespace Prefix:	jblu_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

X

- 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