Special Items, Net (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022
Restructuring Cost and Reserve [Line Items]
Operating special items, net	$ 6	$ (5)	$ 19	$ 152
Debt refinancing and extinguishment	17	0	34	2
Mark-to-market adjustments on equity investments, net	11	89	11	90
Nonoperating special items, net	28	89	45	92
Income tax special items, net	0	(9)	0	(9)
American Airlines, Inc.
Restructuring Cost and Reserve [Line Items]
Debt refinancing and extinguishment	17	0	34	0
Mark-to-market adjustments on equity investments, net	11	89	11	90
Nonoperating special items, net	28	89	45	90
Income tax special items, net	0	(9)	0	(9)
Mainline
Restructuring Cost and Reserve [Line Items]
Severance expenses	0	0	21	0
Fleet impairment	0	0	0	149
Other operating special items, net	0	(5)	(8)	3
Operating special items, net	0	(5)	13	152
Mainline | American Airlines, Inc.
Restructuring Cost and Reserve [Line Items]
Severance expenses	0	0	21	0
Fleet impairment	0	0	0	149
Other operating special items, net	0	(5)	(8)	3
Operating special items, net	0	(5)	13	152
Regional Carrier
Restructuring Cost and Reserve [Line Items]
Operating special items, net	$ 6	$ 0	$ 6	$ 0