Income Taxes - Additional Information (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023
Income Taxes [Line Items]
Other carryforwards	$ 6,000
Income tax provision	$ 79	$ 308	$ 299
Income tax expense, effective rate	41.20%	26.70%	26.70%
Federal
Income Taxes [Line Items]
Gross NOL carryforwards	$ 11,900
Operating loss carryforwards and other carryforwards, subject to expiration	1,600
Operating loss carryforwards and other carryforwards, not subject to expiration	16,300
State
Income Taxes [Line Items]
Gross NOL carryforwards	5,000
American Airlines, Inc.
Income Taxes [Line Items]
Other carryforwards	3,800
Income tax provision	$ 197	$ 426	$ 394
Income tax expense, effective rate	25.90%	25.20%	24.90%
American Airlines, Inc. | Federal
Income Taxes [Line Items]
Gross NOL carryforwards	$ 11,700
Operating loss carryforwards and other carryforwards, subject to expiration	1,800
Operating loss carryforwards and other carryforwards, not subject to expiration	13,700
American Airlines, Inc. | State
Income Taxes [Line Items]
Gross NOL carryforwards	$ 4,700