Income Taxes - Deferred Tax Assets and Liabilities (Details) - USD ($) $ in Millions	Dec. 31, 2021	Dec. 31, 2020
Deferred tax assets:
Operating loss and other carryforwards	$ 4,612	$ 4,027
Loyalty program liability	1,903	1,977
Leases	1,833	1,913
Pensions	941	1,405
Postretirement benefits other than pensions	214	203
Rent expense	92	96
Reorganization items	24	28
Other	760	847
Total deferred tax assets	10,379	10,496
Valuation allowance	(34)	(34)
Net deferred tax assets	10,345	10,462
Deferred tax liabilities:
Accelerated depreciation and amortization	(4,747)	(5,028)
Leases	(1,767)	(1,818)
Other	(284)	(386)
Total deferred tax liabilities	(6,798)	(7,232)
Net deferred tax asset	3,547	3,230
American Airlines, Inc.
Deferred tax assets:
Operating loss and other carryforwards	4,476	3,944
Loyalty program liability	1,903	1,977
Leases	1,822	1,904
Pensions	934	1,397
Postretirement benefits other than pensions	215	203
Rent expense	92	96
Reorganization items	24	28
Other	710	796
Total deferred tax assets	10,176	10,345
Valuation allowance	(24)	(24)
Net deferred tax assets	10,152	10,321
Deferred tax liabilities:
Accelerated depreciation and amortization	(4,715)	(4,992)
Leases	(1,758)	(1,809)
Other	(279)	(294)
Total deferred tax liabilities	(6,752)	(7,095)
Net deferred tax asset	$ 3,400	$ 3,226