Income Taxes - Deferred Tax Assets and Liabilities (Details) - USD ($) $ in Millions	Dec. 31, 2024	Dec. 31, 2023
Deferred tax assets:
Net operating loss and other carryforwards	$ 4,292	$ 4,238
Loyalty program liability	1,799	1,774
Leases	1,596	1,758
Pension benefits	234	434
Postretirement benefits other than pension benefits	270	274
Rent expense	60	84
Other	775	902
Total deferred tax assets	9,026	9,464
Valuation allowance	(22)	(22)
Net deferred tax assets	9,004	9,442
Deferred tax liabilities:
Accelerated depreciation and amortization	(4,620)	(4,503)
Leases	(1,656)	(1,798)
Other	(252)	(262)
Total deferred tax liabilities	(6,528)	(6,563)
Net deferred tax asset	2,476	2,879
American Airlines, Inc.
Deferred tax assets:
Net operating loss and other carryforwards	3,891	3,960
Loyalty program liability	1,799	1,774
Leases	1,582	1,746
Pension benefits	228	428
Postretirement benefits other than pension benefits	270	273
Rent expense	59	84
Other	726	846
Total deferred tax assets	8,555	9,111
Valuation allowance	(12)	(12)
Net deferred tax assets	8,543	9,099
Deferred tax liabilities:
Accelerated depreciation and amortization	(4,599)	(4,479)
Leases	(1,642)	(1,786)
Other	(244)	(254)
Total deferred tax liabilities	(6,485)	(6,519)
Net deferred tax asset	$ 2,058	$ 2,580