Leases - Components of Lease Expense (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Lessee, Lease, Description [Line Items]
Operating lease cost	$ 2,007	$ 2,012	$ 1,957
Finance lease cost:
Amortization of assets	143	107	92
Interest on lease liabilities	47	44	38
Variable lease cost	2,580	2,471	1,801
Total net lease cost	4,777	4,634	3,888
American Airlines, Inc.
Lessee, Lease, Description [Line Items]
Operating lease cost	1,987	1,998	1,943
Finance lease cost:
Amortization of assets	135	107	92
Interest on lease liabilities	46	44	38
Variable lease cost	2,572	2,461	1,786
Total net lease cost	$ 4,740	$ 4,610	$ 3,859