Employee Benefit Plans - Schedule of Assumption Used to Determine Benefit Obligations (Details)	12 Months Ended
	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023
Pension Benefits
Benefit obligations as of December 31:
Weighted average discount rate	5.50%	5.70%
Net periodic benefit cost (income) for the years ended December 31:
Weighted average discount rate	5.70%	5.20%	5.60%
Weighted average expected rate of return on plan assets	7.75%	8.00%	8.00%
Retiree Medical and  Other Postretirement Benefits
Benefit obligations as of December 31:
Weighted average discount rate	5.30%	5.60%
Net periodic benefit cost (income) for the years ended December 31:
Weighted average discount rate	5.60%	5.30%	5.70%
Weighted average expected rate of return on plan assets	7.75%	8.00%	8.00%
Weighted average health care cost trend rate assumed for next year	7.00%	6.50%	6.50%
Weighted average health care cost trend rate assumed thereafter	4.50%
American Airlines, Inc. | Pension Benefits
Benefit obligations as of December 31:
Weighted average discount rate	5.50%	5.70%
Net periodic benefit cost (income) for the years ended December 31:
Weighted average discount rate	5.70%	5.20%	5.60%
Weighted average expected rate of return on plan assets	7.75%	8.00%	8.00%
American Airlines, Inc. | Retiree Medical and  Other Postretirement Benefits
Benefit obligations as of December 31:
Weighted average discount rate	5.30%	5.60%
Net periodic benefit cost (income) for the years ended December 31:
Weighted average discount rate	5.60%	5.30%	5.70%
Weighted average expected rate of return on plan assets	7.75%	8.00%	8.00%
Weighted average health care cost trend rate assumed for next year	7.00%	6.50%	6.50%
Weighted average health care cost trend rate assumed thereafter	4.50%