Income Taxes - Components of Income Tax Provision (Benefit) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Current income tax benefit:
State, local and foreign	$ 0	$ 0	$ (6)
Deferred income tax provision:
Federal	285	268	59
State and local	23	31	6
Deferred income tax provision	308	299	65
Total income tax provision	308	299	59
American Airlines, Inc.
Current income tax benefit:
State, local and foreign	0	0	(6)
Deferred income tax provision:
Federal	391	361	112
State and local	35	33	10
Deferred income tax provision	426	394	122
Total income tax provision	$ 426	$ 394	$ 116