Special Items, Net (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Restructuring Cost and Reserve [Line Items]
Operating special items, net	$ (1,672)	$ 121	$ (447)	$ 259
Mark-to-market adjustments on equity and other investments, net	0	61	180	(9)
Debt refinancing, extinguishment and other charges	11	8	48	8
Nonoperating special items, net	11	69	228	(1)
Write-down of aircraft and spare parts			784
Write-offs of ROU assets and lease return costs			76
American Airlines, Inc. [Member]
Restructuring Cost and Reserve [Line Items]
Operating special items, net	(1,697)	121	(472)	259
Mark-to-market adjustments on equity and other investments, net	0	61	180	(9)
Debt refinancing, extinguishment and other charges	11	8	48	8
Nonoperating special items, net	11	69	228	(1)
Write-down of aircraft and spare parts			773
Write-offs of ROU assets and lease return costs			76
Mainline [Member]
Restructuring Cost and Reserve [Line Items]
PSP Financial Assistance	(1,803)	0	(1,803)	0
Severance expenses	332	0	537	0
Labor contract expenses	10	0	228	0
Fleet impairment	0	0	743	0
Fleet restructuring expenses	0	77	0	160
Merger integration expenses	0	39	0	76
Mark-to-market adjustments on bankruptcy obligations, net	0	5	(49)	5
Other operating special items, net	(33)	0	(18)	18
Operating special items, net	(1,494)	121	(362)	259
Mainline [Member] | American Airlines, Inc. [Member]
Restructuring Cost and Reserve [Line Items]
PSP Financial Assistance	(1,803)	0	(1,803)	0
Severance expenses	332	0	537	0
Labor contract expenses	10	0	228	0
Fleet impairment	0	0	743	0
Fleet restructuring expenses	0	77	0	160
Merger integration expenses	0	39	0	76
Mark-to-market adjustments on bankruptcy obligations, net	0	5	(49)	5
Other operating special items, net	(33)	0	(18)	18
Operating special items, net	(1,494)	121	(362)	259
Regional Carrier [Member]
Restructuring Cost and Reserve [Line Items]
PSP Financial Assistance	(216)	0	(216)	0
Severance expenses	14	0	14	0
Fleet impairment	24	0	117	0
Operating special items, net	(178)	0	(85)	0
Regional Carrier [Member] | American Airlines, Inc. [Member]
Restructuring Cost and Reserve [Line Items]
PSP Financial Assistance	(216)	0	(216)	0
Fleet impairment	13	0	106	0
Operating special items, net	$ (203)	$ 0	$ (110)	$ 0