Income Taxes - Deferred Tax Assets and Liabilities (Details) - USD ($) $ in Millions	Dec. 31, 2025	Dec. 31, 2024
Deferred tax assets:
Net operating loss and other carryforwards	$ 4,095	$ 4,292
Loyalty program liability	1,949	1,799
Leases	1,566	1,596
Pension benefits	109	234
Postretirement benefits other than pension benefits	260	270
Rent expense	37	60
Other	676	775
Total deferred tax assets	8,692	9,026
Valuation allowance	(22)	(22)
Net deferred tax assets	8,670	9,004
Deferred tax liabilities:
Accelerated depreciation and amortization	(4,543)	(4,620)
Leases	(1,594)	(1,656)
Other	(174)	(252)
Total deferred tax liabilities	(6,311)	(6,528)
Net deferred tax asset	2,359	2,476
American Airlines, Inc.
Deferred tax assets:
Net operating loss and other carryforwards	3,566	3,891
Loyalty program liability	1,949	1,799
Leases	1,553	1,582
Pension benefits	104	228
Postretirement benefits other than pension benefits	260	270
Rent expense	37	59
Other	633	726
Total deferred tax assets	8,102	8,555
Valuation allowance	(12)	(12)
Net deferred tax assets	8,090	8,543
Deferred tax liabilities:
Accelerated depreciation and amortization	(4,520)	(4,599)
Leases	(1,582)	(1,642)
Other	(165)	(244)
Total deferred tax liabilities	(6,267)	(6,485)
Net deferred tax asset	$ 1,823	$ 2,058