Revenue Recognition - Changes in Loyalty Program Liability (Details) - USD ($) $ in Millions	9 Months Ended
	Sep. 30, 2023	Dec. 31, 2022
Movement In Contract With Customer, Liability [Roll Forward]
Beginning balance	$ 15,890
Ending balance	16,998
American Airlines, Inc.
Movement In Contract With Customer, Liability [Roll Forward]
Beginning balance	15,890
Ending balance	16,998
Loyalty program liability
Movement In Contract With Customer, Liability [Roll Forward]
Beginning balance	9,145
Deferral of revenue	2,900
Recognition of revenue	(2,720)
Ending balance	$ 9,325
Inactive period before expiration of mileage credits	24 months
Deferred revenue, current	$ 3,491	$ 3,169
Revenue recognition term	12 months
Loyalty program liability | American Airlines, Inc.
Movement In Contract With Customer, Liability [Roll Forward]
Beginning balance	$ 9,145
Deferral of revenue	2,900
Recognition of revenue	(2,720)
Ending balance	$ 9,325
Inactive period before expiration of mileage credits	24 months
Deferred revenue, current	$ 3,491	$ 3,169
Revenue recognition term	12 months