Leases - Supplemental Cash Flow and Other Information (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Cash paid for amounts included in the measurement of lease liabilities:
Operating cash flows from operating leases	$ 1,830	$ 2,033	$ 1,990
Operating cash flows from finance leases	40	48	47
Financing cash flows from finance leases	152	265	190
Gain on sale leaseback transactions, net	76	12	2
American Airlines, Inc.
Cash paid for amounts included in the measurement of lease liabilities:
Operating cash flows from operating leases	1,810	2,011	1,968
Operating cash flows from finance leases	40	47	46
Financing cash flows from finance leases	145	255	179
Gain on sale leaseback transactions, net	$ 76	$ 12	$ 2