Commitments and Contingencies - Employees (Details)	3 Months Ended	9 Months Ended
	Dec. 31, 2022	Sep. 30, 2023 employeeGroup employee
Air Line Pilots Association, International ("ALPA")
Concentration Risk [Line Items]
Collective bargaining arrangement, term	2 years
Aircraft Mechanics Fraternal Association (AMFA)
Concentration Risk [Line Items]
Number of employees included in union application (approximately) | employee		650
Unionized Employees Concentration Risk | Number of Employees, Total
Concentration Risk [Line Items]
Number of union-represented employee groups | employeeGroup		6
Company's employees covered under collective bargaining agreements percentage		85.00%
Unionized Employees Concentration Risk | Number of Employees, Total | Air Line Pilots Association, International ("ALPA")
Concentration Risk [Line Items]
Company's employees covered under collective bargaining agreements percentage		27.00%
Unionized Employees Concentration Risk | Number of Employees, Total | Association of Flight Attendants ("AFA-CWA")
Concentration Risk [Line Items]
Company's employees covered under collective bargaining agreements percentage		48.00%
Unionized Employees Concentration Risk | Number of Employees, Total | Professional Airline Flight Control Association ("PAFCA")
Concentration Risk [Line Items]
Company's employees covered under collective bargaining agreements percentage		1.00%
Unionized Employees Concentration Risk | Number of Employees, Total | International Association of Machinists and Aerospace Workers ("IAMAW")
Concentration Risk [Line Items]
Company's employees covered under collective bargaining agreements percentage		3.00%
Unionized Employees Concentration Risk | Number of Employees, Total | Transport Workers Union of America ("TWU")
Concentration Risk [Line Items]
Company's employees covered under collective bargaining agreements percentage		2.00%
Unionized Employees Concentration Risk | Number of Employees, Total | Aircraft Mechanics Fraternal Association (AMFA)
Concentration Risk [Line Items]
Company's employees covered under collective bargaining agreements percentage		5.00%