Commitments and Contingencies - Additional Information (Details) $ in Millions	12 Months Ended
	Dec. 31, 2024 USD ($) aircraft employeeGroup	Dec. 31, 2020 USD ($)	Dec. 31, 2023 USD ($)
Long-term Purchase Commitment [Line Items]
Preproduction costs related to long-term supply arrangements, costs capitalized	$ 95		$ 78
Damages sought		$ 149
Amount awarded from other party	$ 40
Number of union-represented employee groups | employeeGroup	7
Amount of employees represented by unions	87.00%
Accrued liabilities for health care claims	$ 6		$ 5
Total Aircraft
Long-term Purchase Commitment [Line Items]
Number of aircraft agreed to purchase | aircraft	187
Total Aircraft | A320neo
Long-term Purchase Commitment [Line Items]
Number of aircraft agreed to purchase | aircraft	27
Total Aircraft | A321neo
Long-term Purchase Commitment [Line Items]
Number of aircraft agreed to purchase | aircraft	160