Revenue Recognition - Changes in Loyalty Program Liability (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2024	Dec. 31, 2023
Movement In Contract With Customer, Liability [Roll Forward]
Beginning balance	$ 15,527
Ending balance	18,138
American Airlines, Inc.
Movement In Contract With Customer, Liability [Roll Forward]
Beginning balance	15,527
Ending balance	18,138
Loyalty program liability
Movement In Contract With Customer, Liability [Roll Forward]
Beginning balance	9,327
Deferral of revenue	1,159
Recognition of revenue	(874)
Ending balance	$ 9,612
Inactive period before expiration of mileage credits	24 months
Deferred revenue, current	$ 3,618	$ 3,453
Revenue recognition term	12 months
Loyalty program liability | American Airlines, Inc.
Movement In Contract With Customer, Liability [Roll Forward]
Beginning balance	$ 9,327
Deferral of revenue	1,159
Recognition of revenue	(874)
Ending balance	$ 9,612
Inactive period before expiration of mileage credits	24 months
Deferred revenue, current	$ 3,618	$ 3,453
Revenue recognition term	12 months