Leases - Supplemental Cash Flow and Other Information (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Cash paid for amounts included in the measurement of lease liabilities:
Operating cash flows from operating leases	$ 1,990	$ 2,053	$ 2,028
Operating cash flows from finance leases	47	37	39
Financing cash flows from finance leases	190	126	114
Non-cash transactions:
ROU assets acquired through operating leases	1,483	1,386	917
Property and equipment acquired through finance leases	46	180	11
Operating lease conversion to finance lease	107	102	5
Finance lease conversion to operating lease	3	0	0
Gain on sale leaseback transactions, net	2	25	107
American Airlines, Inc.
Cash paid for amounts included in the measurement of lease liabilities:
Operating cash flows from operating leases	1,968	2,040	2,015
Operating cash flows from finance leases	46	37	39
Financing cash flows from finance leases	179	126	114
Non-cash transactions:
ROU assets acquired through operating leases	1,448	1,381	898
Property and equipment acquired through finance leases	46	180	11
Operating lease conversion to finance lease	107	102	5
Finance lease conversion to operating lease	3	0	0
Gain on sale leaseback transactions, net	$ 2	$ 25	$ 107