Valuation and Qualifying Accounts (Details) - Allowance for obsolescence of spare parts - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023
SEC Schedule, 12-09, Movement in Valuation Allowances and Reserves [Roll Forward]
Balance at Beginning  of Year	$ 797	$ 728	$ 616
Additions Charged to Statement of Operations Accounts	129	116	98
Deductions and Other	(26)	(47)	14
Balance at End of Year	900	797	728
American Airlines, Inc.
SEC Schedule, 12-09, Movement in Valuation Allowances and Reserves [Roll Forward]
Balance at Beginning  of Year	745	675	566
Additions Charged to Statement of Operations Accounts	95	94	83
Deductions and Other	5	(24)	26
Balance at End of Year	$ 845	$ 745	$ 675