Income Taxes - Reconciliation of Income Tax Provision (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023
Amount
U.S. federal statutory income tax rate	$ 40	$ 242	$ 236
Nontaxable or nondeductible items
Nondeductible meals and other nondeductible employee benefits	28	22	22
Nondeductible officer compensation	10	12	11
Other nontaxable and nondeductible items	0	11	9
Other	(6)	0	0
Domestic state and local income taxes, net of federal effect	7	21	21
Total income tax provision	$ 79	$ 308	$ 299
Rate
U.S. federal statutory income tax rate	21.00%	21.00%	21.00%
Nontaxable or nondeductible items
Nondeductible meals and other nondeductible employee benefits	15.30%	1.90%	2.00%
Nondeductible officer compensation	5.20%	1.10%	1.00%
Other nontaxable and nondeductible items	0.00%	0.90%	0.80%
Other	(3.30%)	0.00%	0.00%
Domestic state and local income taxes, net of federal effect	3.00%	1.80%	1.90%
Effective tax rate	41.20%	26.70%	26.70%
American Airlines, Inc.
Amount
U.S. federal statutory income tax rate	$ 160	$ 355	$ 332
Nontaxable or nondeductible items
Nondeductible meals and other nondeductible employee benefits	23	18	19
Nondeductible officer compensation	10	12	11
Other nontaxable and nondeductible items	(4)	12	4
Other	(6)	0	0
Domestic state and local income taxes, net of federal effect	14	29	28
Total income tax provision	$ 197	$ 426	$ 394
Rate
U.S. federal statutory income tax rate	21.00%	21.00%	21.00%
Nontaxable or nondeductible items
Nondeductible meals and other nondeductible employee benefits	3.00%	1.10%	1.20%
Nondeductible officer compensation	1.30%	0.70%	0.60%
Other nontaxable and nondeductible items	(0.40%)	0.70%	0.30%
Other	(0.80%)	0.00%	0.00%
Domestic state and local income taxes, net of federal effect	1.80%	1.70%	1.80%
Effective tax rate	25.90%	25.20%	24.90%