Condensed Consolidated Statements of Stockholder's Equity - American Airlines, Inc. - USD ($) $ in Millions	Total	Common Stock	Additional Paid-in Capital	Accumulated Other Comprehensive Loss	Retained Deficit	American Airlines, Inc.	American Airlines, Inc. Common Stock	American Airlines, Inc. Additional Paid-in Capital	American Airlines, Inc. Accumulated Other Comprehensive Loss	American Airlines, Inc. Retained Deficit
Beginning balance at Dec. 31, 2023	$ (5,202)	$ 7	$ 7,374	$ (4,894)	$ (7,689)	$ 6,577	$ 0	$ 17,335	$ (4,999)	$ (5,759)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net loss	(312)				(312)	(216)				(216)
Other comprehensive income, net	17			17		17			17
Share-based compensation expense	28		28			27		27
Modification of share-based awards	(20)		(20)			(20)		(20)
Intercompany equity transfer						1		1
Ending balance at Mar. 31, 2024	(5,500)	7	7,371	(4,877)	(8,001)	6,386	0	17,343	(4,982)	(5,975)
Beginning balance at Dec. 31, 2024	(3,977)	7	7,424	(4,565)	(6,843)	8,234	0	17,408	(4,677)	(4,497)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net loss	(473)				(473)	(384)				(384)
Other comprehensive income, net	18			18		18			18
Share-based compensation expense	16		16			15		15
Intercompany equity transfer						1		1
Ending balance at Mar. 31, 2025	$ (4,508)	$ 7	$ 7,348	$ (4,547)	$ (7,316)	$ 7,884	$ 0	$ 17,424	$ (4,659)	$ (4,881)