Income Taxes - Additional Disclosures (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Income Taxes [Line Items]
Other carryforwards	$ 4,700
Income tax provision (benefit)	$ 299	$ 59	$ (555)
Income tax expense, effective rate	27.00%
Federal
Income Taxes [Line Items]
Gross NOL carryforwards	$ 13,700
Operating loss carryforwards and other carryforwards, subject to expiration	3,400
Operating loss carryforwards and other carryforwards, not subject to expiration	15,000
State
Income Taxes [Line Items]
Gross NOL carryforwards	5,500
American Airlines, Inc.
Income Taxes [Line Items]
Other carryforwards	3,600
Income tax provision (benefit)	$ 394	$ 116	$ (500)
Income tax expense, effective rate	25.00%
American Airlines, Inc. | Federal
Income Taxes [Line Items]
Gross NOL carryforwards	$ 13,700
Operating loss carryforwards and other carryforwards, subject to expiration	3,800
Operating loss carryforwards and other carryforwards, not subject to expiration	13,500
American Airlines, Inc. | State
Income Taxes [Line Items]
Gross NOL carryforwards	$ 5,300