Commitments and Contingencies - Collective Bargaining Agreements (Details)	3 Months Ended
	Mar. 31, 2022
Multiemployer Plan [Line Items]
Amount of employees represented by unions	88.00%
Pilots
Multiemployer Plan [Line Items]
Amount of employees represented by unions	31.00%
Flight Attendants
Multiemployer Plan [Line Items]
Amount of employees represented by unions	52.00%
Aircraft Technicians
Multiemployer Plan [Line Items]
Amount of employees represented by unions	2.00%
Aircraft Appearance
Multiemployer Plan [Line Items]
Amount of employees represented by unions	1.00%
Dispatchers
Multiemployer Plan [Line Items]
Amount of employees represented by unions	1.00%
Material Specialists
Multiemployer Plan [Line Items]
Amount of employees represented by unions	1.00%
Maintenance Control
Multiemployer Plan [Line Items]
Amount of employees represented by unions	1.00%