Revenue Recognition - Changes in Loyalty Program Liability (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2026	Dec. 31, 2025
Movement In Contract With Customer, Liability [Roll Forward]
Beginning balance	$ 17,722
Ending balance	21,617
American Airlines, Inc.
Movement In Contract With Customer, Liability [Roll Forward]
Beginning balance	17,722
Ending balance	21,617
Loyalty program liability
Movement In Contract With Customer, Liability [Roll Forward]
Beginning balance	10,564
Deferral of revenue	2,020
Recognition of revenue	(998)
Ending balance	$ 11,586
Inactive period before expiration of mileage credits (in months)	24 months
Deferred revenue, current	$ 4,210	$ 3,725
Revenue recognition term (in months)	12 months
Loyalty program liability | American Airlines, Inc.
Movement In Contract With Customer, Liability [Roll Forward]
Beginning balance	$ 10,564
Deferral of revenue	2,020
Recognition of revenue	(998)
Ending balance	$ 11,586
Inactive period before expiration of mileage credits (in months)	24 months
Deferred revenue, current	$ 4,210	$ 3,725
Revenue recognition term (in months)	12 months