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, 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)
Beginning balance at Dec. 31, 2025	(3,727)	7	7,387	(4,389)	(6,732)	9,028	0	17,468	(4,507)	(3,933)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net loss	(382)				(382)	(274)				(274)
Other comprehensive income, net	17			17		17			17
Share-based compensation expense	22		22			22		22
Ending balance at Mar. 31, 2026	$ (4,077)	$ 7	$ 7,402	$ (4,372)	$ (7,114)	$ 8,793	$ 0	$ 17,490	$ (4,490)	$ (4,207)