Condensed Consolidated Statements of Stockholders' Equity (Deficit) - USD ($) $ in Millions	Total	American Airlines, Inc. [Member]	Common Stock [Member]	Common Stock [Member] American Airlines, Inc. [Member]	Additional Paid-in Capital [Member]	Additional Paid-in Capital [Member] American Airlines, Inc. [Member]	Accumulated Other Comprehensive Loss [Member]	Accumulated Other Comprehensive Loss [Member] American Airlines, Inc. [Member]	Retained Earnings (Deficit) [Member]	Retained Earnings (Deficit) [Member] American Airlines, Inc. [Member]
Beginning Balance at Dec. 31, 2018	$ (169)	$ 11,770	$ 5	$ 0	$ 4,964	$ 16,802	$ (5,896)	$ (5,992)	$ 758	$ 960
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)	185	230							185	230
Other comprehensive loss, net	(13)	(13)					(13)	(13)
Purchase and retirement of AAG common stock	(610)				(610)
Dividends declared on AAG common stock	(46)								(46)
Issuance of shares of AAG common stock pursuant to employee stock plans net of shares withheld for cash taxes	(8)				(8)
Share-based compensation expense	25	25			25	25
Ending Balance at Mar. 31, 2019	(636)	12,012	5	0	4,371	16,827	(5,909)	(6,005)	897	1,190
Beginning Balance at Dec. 31, 2019	(118)	13,422	4	0	3,945	16,903	(6,331)	(6,423)	2,264	2,942
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)	(2,241)	(2,169)							(2,241)	(2,169)
Other comprehensive loss, net	(149)	(149)					(149)	(149)
Purchase and retirement of AAG common stock	(145)				(145)
Dividends declared on AAG common stock	(44)								(44)
Issuance of shares of AAG common stock pursuant to employee stock plans net of shares withheld for cash taxes	(13)				(13)
Settlement of single-dip unsecured claims held in Disputed Claims Reserve	56				56
Share-based compensation expense	18	18			18	18
Intercompany equity transfer		56				56
Ending Balance at Mar. 31, 2020	$ (2,636)	$ 11,178	$ 4	$ 0	$ 3,861	$ 16,977	$ (6,480)	$ (6,572)	$ (21)	$ 773