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, 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
Other comprehensive loss, net	(18)	(18)					(18)	(18)
Purchase and retirement of AAG common stock	(449)				(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, 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	716	818
Net income | Accounting Standards Update 2016-02 [Member]	(37)	(37)
Other comprehensive loss, net	(33)	(33)
Ending Balance at Jun. 30, 2018	(727)	10,974	5	0	4,923	16,760	(5,809)	(5,906)	154	120
Beginning Balance at Mar. 31, 2018	(865)	10,360	5	0	5,279	16,740	(5,794)	(5,891)	(355)	(489)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	556	609							556	609
Net income | Accounting Standards Update 2016-02 [Member]	(10)	(10)
Other comprehensive loss, net	(15)	(15)					(15)	(15)
Purchase and retirement of AAG common stock	(350)				(350)
Dividends declared on AAG common stock	(47)								(47)
Issuance of shares of AAG common stock pursuant to employee stock plans net of shares withheld for cash taxes	(26)				(26)
Share-based compensation expense	20	20			20	20
Ending Balance at Jun. 30, 2018	(727)	10,974	5	0	4,923	16,760	(5,809)	(5,906)	154	120
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)				(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, 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	847	944
Other comprehensive loss, net	(31)	(31)
Ending Balance at Jun. 30, 2019	(22)	12,740	5	0	4,386	16,859	(5,927)	(6,023)	1,514	1,904
Beginning Balance at Mar. 31, 2019	(636)	12,012	5	0	4,371	16,827	(5,909)	(6,005)	897	1,190
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	662	714							662	714
Other comprehensive loss, net	(18)	(18)					(18)	(18)
Dividends declared on AAG common stock	(45)								(45)
Issuance of shares of AAG common stock pursuant to employee stock plans net of shares withheld for cash taxes	(17)				(17)
Settlement of single-dip unsecured claims held in Disputed Claims Reserve	7				7
Share-based compensation expense	25	25			25	25
Intercompany equity transfer		7				7
Ending Balance at Jun. 30, 2019	$ (22)	$ 12,740	$ 5	$ 0	$ 4,386	$ 16,859	$ (5,927)	$ (6,023)	$ 1,514	$ 1,904