Merger (Details) $ / shares in Units, $ in Millions	Jul. 28, 2022 USD ($) d $ / shares	Jul. 27, 2022 USD ($)	Aug. 01, 2024 $ / shares	Jan. 25, 2023 $ / shares	Oct. 26, 2022 $ / shares
Frontier Merger Agreement
Business Acquisition [Line Items]
Termination agreement amount paid | $		$ 25.0
JetBlue Merger Agreement
Business Acquisition [Line Items]
Merger consideration, price per share (in dollars per share)	$ 33.50
Approval prepayment amount price per share (in dollars per share)	2.50
Additional approval prepayment amount price per share (in dollars per share)	0.10
Approval prepayment maximum share price threshold (in dollars per share)	$ 1.15
Additional prepayment amount, maximum number of days after end of month for payment | d	5
Approval prepayment amount price per share, paid (in dollars per share)					$ 2.50
Business acquisition, breakup fee | $	$ 94.2
Payment to be received upon termination of merger agreement, antitrust regulatory clearance not approved | $	70.0
Payment to be received by stockholders' upon termination of merger agreement, antitrust regulatory clearance not approved | $	$ 400.0
JetBlue Merger Agreement | Subsequent Event
Business Acquisition [Line Items]
Additional approval prepayment amount price per share, paid (in dollars per share)				$ 0.10
JetBlue Merger Agreement | Maximum
Business Acquisition [Line Items]
Additional approval prepayment amount price per share (in dollars per share)	$ 0.65
JetBlue Merger Agreement | Forecast | Maximum
Business Acquisition [Line Items]
Merger consideration, price per share (in dollars per share)			$ 34.15
JetBlue Merger Agreement | JetBlue Airways
Business Acquisition [Line Items]
Reimbursement of prior business exit costs | $		$ 25.0