Employee Benefit Plans - Schedule of Assumption Used to Determine Benefit Obligations (Details)	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Net periodic benefit cost (income):
Weighted average expected rate of return on plan assets	8.00%
Pension Benefits
Benefit obligations:
Weighted average discount rate	5.20%	5.60%
Net periodic benefit cost (income):
Weighted average discount rate	5.60%	3.00%	2.70%
Weighted average expected rate of return on plan assets	8.00%	8.00%	8.00%
Retiree Medical and  Other Postretirement Benefits
Benefit obligations:
Weighted average discount rate	5.30%	5.70%
Net periodic benefit cost (income):
Weighted average discount rate	5.70%	2.80%	2.40%
Weighted average expected rate of return on plan assets	8.00%	8.00%	8.00%
Weighted average health care cost trend rate assumed for next year	6.50%	5.80%	4.80%
Weighted average health care cost trend rate assumed thereafter	4.50%
American Airlines, Inc.
Net periodic benefit cost (income):
Weighted average expected rate of return on plan assets	8.00%
American Airlines, Inc. | Pension Benefits
Benefit obligations:
Weighted average discount rate	5.20%	5.60%
Net periodic benefit cost (income):
Weighted average discount rate	5.60%	3.00%	2.70%
Weighted average expected rate of return on plan assets	8.00%	8.00%	8.00%
American Airlines, Inc. | Retiree Medical and  Other Postretirement Benefits
Benefit obligations:
Weighted average discount rate	5.30%	5.70%
Net periodic benefit cost (income):
Weighted average discount rate	5.70%	2.80%	2.40%
Weighted average expected rate of return on plan assets	8.00%	8.00%	8.00%
Weighted average health care cost trend rate assumed for next year	6.50%	5.80%	4.80%
Weighted average health care cost trend rate assumed thereafter	4.50%