Income Taxes - Components of Income Tax Provision (Benefit) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023
Deferred income tax provision:
Federal	$ 72	$ 285	$ 268
State and local	7	23	31
Deferred income tax provision	79	308	299
Total income tax provision	79	308	299
American Airlines, Inc.
Deferred income tax provision:
Federal	183	391	361
State and local	14	35	33
Deferred income tax provision	197	426	394
Total income tax provision	$ 197	$ 426	$ 394