Income Taxes - Additional Disclosures (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Income Taxes [Line Items]
Other carryforwards	$ 5,900
Income tax provision	$ 308	$ 299	$ 59
Income tax expense, effective rate	27.00%
Federal
Income Taxes [Line Items]
Gross NOL carryforwards	$ 12,900
Operating loss carryforwards and other carryforwards, subject to expiration	2,600
Operating loss carryforwards and other carryforwards, not subject to expiration	16,200
State
Income Taxes [Line Items]
Gross NOL carryforwards	5,200
American Airlines, Inc.
Income Taxes [Line Items]
Other carryforwards	4,200
Income tax provision	$ 426	$ 394	$ 116
Income tax expense, effective rate	25.00%
American Airlines, Inc. | Federal
Income Taxes [Line Items]
Gross NOL carryforwards	$ 12,800
Operating loss carryforwards and other carryforwards, subject to expiration	2,900
Operating loss carryforwards and other carryforwards, not subject to expiration	14,100
American Airlines, Inc. | State
Income Taxes [Line Items]
Gross NOL carryforwards	$ 5,000