Condensed Consolidated Statements of Stockholders' Deficit - American Airlines Group Inc. - USD ($) $ in Millions	Total	Common Stock	Additional Paid-in Capital	Accumulated Other Comprehensive Loss	Retained Deficit
Beginning balance at Dec. 31, 2023	$ (5,202)	$ 7	$ 7,374	$ (4,894)	$ (7,689)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net (loss) income	(312)				(312)
Other comprehensive income, net	17			17
Issuance of shares of AAG common stock pursuant to employee stock plans net of shares withheld for cash taxes	(11)		(11)
Share-based compensation expense	28		28
Modification of share-based awards	(20)		(20)
Ending balance at Mar. 31, 2024	(5,500)	7	7,371	(4,877)	(8,001)
Beginning balance at Dec. 31, 2023	(5,202)	7	7,374	(4,894)	(7,689)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net (loss) income	256
Other comprehensive income, net	59
Ending balance at Sep. 30, 2024	(4,854)	7	7,407	(4,835)	(7,433)
Beginning balance at Mar. 31, 2024	(5,500)	7	7,371	(4,877)	(8,001)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net (loss) income	717				717
Other comprehensive income, net	19			19
Issuance of shares of AAG common stock pursuant to employee stock plans net of shares withheld for cash taxes	(3)		(3)
Share-based compensation expense	21		21
Ending balance at Jun. 30, 2024	(4,746)	7	7,389	(4,858)	(7,284)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net (loss) income	(149)				(149)
Other comprehensive income, net	23			23
Issuance of shares of AAG common stock pursuant to employee stock plans net of shares withheld for cash taxes	(4)		(4)
Share-based compensation expense	22		22
Ending balance at Sep. 30, 2024	(4,854)	7	7,407	(4,835)	(7,433)
Beginning balance at Dec. 31, 2024	(3,977)	7	7,424	(4,565)	(6,843)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net (loss) income	(473)				(473)
Other comprehensive income, net	18			18
Settlement of PSP1 and Treasury Loan Warrants (see Note 3)	(79)		(79)
Issuance of shares of AAG common stock pursuant to employee stock plans net of shares withheld for cash taxes	(13)		(13)
Share-based compensation expense	16		16
Ending balance at Mar. 31, 2025	(4,508)	7	7,348	(4,547)	(7,316)
Beginning balance at Dec. 31, 2024	(3,977)	7	7,424	(4,565)	(6,843)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net (loss) income	12
Other comprehensive income, net	50
Ending balance at Sep. 30, 2025	(3,962)	7	7,377	(4,515)	(6,831)
Beginning balance at Mar. 31, 2025	(4,508)	7	7,348	(4,547)	(7,316)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net (loss) income	599				599
Other comprehensive income, net	17			17
Issuance of shares of AAG common stock pursuant to employee stock plans net of shares withheld for cash taxes	(1)		(1)
Share-based compensation expense	23		23
Ending balance at Jun. 30, 2025	(3,870)	7	7,370	(4,530)	(6,717)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net (loss) income	(114)				(114)
Other comprehensive income, net	15			15
Issuance of shares of AAG common stock pursuant to employee stock plans net of shares withheld for cash taxes	(2)		(2)
Share-based compensation expense	9		9
Ending balance at Sep. 30, 2025	$ (3,962)	$ 7	$ 7,377	$ (4,515)	$ (6,831)