Other Current Liabilities (Details) - USD ($) $ in Millions	Sep. 30, 2022	Dec. 31, 2021
Other Liabilities Disclosure [Abstract]
Salaries, wages and benefits	$ 97	$ 89
Passenger and other taxes and fees payable	91	84
Aircraft maintenance	60	36
Leased aircraft return costs	51	25
Station obligations	48	64
Fuel liabilities	28	23
Current portion of phantom equity units	0	26
Other current liabilities	46	36
Total other current liabilities	$ 421	$ 383