Consolidated Statements of Stockholders' Equity - 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, 2017	$ (780)	$ 9,888	$ 5	$ 0	$ 5,714	$ 16,716	$ (5,776)	$ (5,873)	$ (723)	$ (955)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	159	209							159	209
Net income | Accounting Standards Update 2016-02 [Member]	(27)	(27)
Other comprehensive loss, net	(18)	(18)					(18)	(18)
Purchase and retirement of AAG common stock	(449)		0		(449)
Dividends declared on AAG common stock	(48)								(48)
Issuance of shares of AAG common stock pursuant to employee stock plans net of shares withheld for cash taxes	(10)				(10)
Share-based compensation expense	24	24			24	24
Ending Balance at Mar. 31, 2018	(865)	10,360	5	0	5,279	16,740	(5,794)	(5,891)	(355)	(489)
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	185	230							185	230
Other comprehensive loss, net	(13)	(13)					(13)	(13)
Purchase and retirement of AAG common stock	(610)		0		(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