Transactions with Related Parties - Additional Information (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Related Party Transaction [Line Items]
Capacity purchases from third-party regional carriers	$ 4,643	$ 4,385	$ 3,204
American Airlines, Inc.
Related Party Transaction [Line Items]
Capacity purchases from third-party regional carriers	4,619	4,345	3,111
American Airlines, Inc. | Regional Carrier | AAG's Wholly-owned Subsidiaries | Airline Capacity Purchase Arrangements
Related Party Transaction [Line Items]
Capacity purchases from third-party regional carriers	$ 2,700	$ 2,500	$ 2,100