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Financial Derivative Instruments and Risk Management - Hedged Percentages Of Our Projected Fuel (Details)	Sep. 30, 2024
Fuel | Call Option
Derivatives, Fair Value [Line Items]
Fourth quarter 2024	20.00%

X

- Definition

Percentage Fuel Hedged - Fourth Quarter Current Year

+ References

No definition available.

+ Details

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Namespace Prefix:	jblu_
Data Type:	dtr-types1:percentItemType
Balance Type:	na
Period Type:	instant

X

- 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

X

- Details

Name:	srt_EnergyAxis=srt_FuelMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_DerivativeInstrumentRiskAxis=us-gaap_CallOptionMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: