Name:	jblu_RestrictedAssetsPledgedRelatedToWorkersCompensationInsurancePoliciesAndOtherBusinessPartnerAgreements
Namespace Prefix:	jblu_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

Restricted assets pledged under standby letters of credit related to lease agreements.

No definition available.

Name:	jblu_RestrictedAssetsPledgedUnderLetterOfCredit
Namespace Prefix:	jblu_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

Unrecorded Unconditional Purchase Obligation, after Year Four

No definition available.

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

Unrecorded Unconditional Purchase Obligations Disclosure.

No definition available.

Name:	jblu_UnrecordedUnconditionalPurchaseObligationsDisclosure
Namespace Prefix:	jblu_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	instant

Amount of fixed and determinable portion of unrecorded unconditional purchase obligation to be paid in next fiscal year following current fiscal year. Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach).

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 440
-SubTopic 10
-Section 50
-Paragraph 4
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=121559207&loc=d3e25336-109308

Name:	us-gaap_UnrecordedUnconditionalPurchaseObligationBalanceOnFirstAnniversary
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Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

Amount of fixed and determinable portion of unrecorded unconditional purchase obligation to be paid in fourth fiscal year following current fiscal year. Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach).

Name:	us-gaap_UnrecordedUnconditionalPurchaseObligationBalanceOnFourthAnniversary
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Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

Amount of fixed and determinable portion of unrecorded unconditional purchase obligation to be paid in second fiscal year following current fiscal year. Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach).

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

Amount of fixed and determinable portion of unrecorded unconditional purchase obligation to be paid in third fiscal year following current fiscal year. Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach).

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

Amount of fixed and determinable portion of unrecorded unconditional purchase obligation to be paid in remainder of current fiscal year.

No definition available.

Name:	us-gaap_UnrecordedUnconditionalPurchaseObligationDueInRemainderOfFiscalYear
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

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.

No definition available.