Special Charges (Details) - JetBlue Merger Agreement $ in Millions	3 Months Ended
Mar. 31, 2024 USD ($)	Mar. 31, 2023 USD ($)	Jul. 28, 2022 installment
Unusual or Infrequent Item, or Both [Line Items]
Legal, advisory and other fees	$ 28.3	$ 7.2
Retention award payments number of installments \| installment			2
Retention award recorded	$ 8.0	$ 6.7

This element represents acquisition-related costs incurred to effect a business combination which costs have been expensed during the period. Such costs include finder's fees; advisory, legal, accounting, valuation, and other professional or consulting fees; general administrative costs, including the costs of maintaining an internal acquisitions department; and may include costs of registering and issuing debt and equity securities.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Name Accounting Standards Codification
-Topic 805
-SubTopic 10
-Section 25
-Paragraph 23
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147479405/805-10-25-23

Name:	us-gaap_BusinessCombinationAcquisitionRelatedCosts
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration