Income Taxes - Components of Income Tax Provision (Benefit) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Current income tax benefit:
State, local and foreign	$ 0	$ (6)	$ 0
Deferred income tax provision (benefit):
Federal	268	59	(508)
State and local	31	6	(47)
Deferred income tax provision (benefit)	299	65	(555)
Total income tax provision (benefit)	299	59	(555)
American Airlines, Inc.
Current income tax benefit:
State, local and foreign	0	(6)	0
Deferred income tax provision (benefit):
Federal	361	112	(453)
State and local	33	10	(47)
Deferred income tax provision (benefit)	394	122	(500)
Total income tax provision (benefit)	$ 394	$ 116	$ (500)