Revenue Recognition - Changes in Loyalty Program Liability (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2022	Dec. 31, 2021
Movement In Contract With Customer, Liability [Roll Forward]
Beginning balance	$ 15,222
Ending balance	17,650
Loyalty program liability
Movement In Contract With Customer, Liability [Roll Forward]
Beginning balance	9,135
Deferral of revenue	791
Recognition of revenue	(622)
Ending balance	$ 9,304
Inactive period before expiration of mileage credits	24 months
Deferred revenue, current	$ 3,110	$ 2,896
Revenue recognition term	12 months
American Airlines, Inc.
Movement In Contract With Customer, Liability [Roll Forward]
Beginning balance	$ 15,222
Ending balance	17,650
American Airlines, Inc. | Loyalty program liability
Movement In Contract With Customer, Liability [Roll Forward]
Beginning balance	9,135
Deferral of revenue	791
Recognition of revenue	(622)
Ending balance	9,304
Deferred revenue, current	$ 3,110	$ 2,896