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Commitment and Contingencies - Employees Under Collective Bargaining Agreements (Details)	12 Months Ended
	Dec. 31, 2023
Pilots | Unionized Employees Concentration Risk
Other Commitments [Line Items]
Concentration risk, percentage	17.90%
Flight Attendants | Unionized Employees Concentration Risk
Other Commitments [Line Items]
Concentration risk, percentage	23.40%
Maintenance Technicians | Unionized Employees Concentration Risk
Other Commitments [Line Items]
Concentration risk, percentage	11.20%
Flight Dispatchers | Unionized Employees Concentration Risk
Other Commitments [Line Items]
Concentration risk, percentage	0.90%
Total
Other Commitments [Line Items]
Concentration risk, percentage	41.30%
Total | Unionized Employees Concentration Risk
Other Commitments [Line Items]
Concentration risk, percentage	53.40%

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Concentration Risk, Percentage

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