Special Items, Net (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2025	Sep. 30, 2024	Sep. 30, 2025	Sep. 30, 2024
Restructuring Cost and Reserve [Line Items]
Debt refinancing, extinguishment and other, net	$ 0	$ 0	$ 17	$ 7
Mark-to-market adjustments on equity investments, net	(4)	(27)	11	23
Nonoperating special items, net	(4)	(27)	28	30
American Airlines, Inc.
Restructuring Cost and Reserve [Line Items]
Debt refinancing, extinguishment and other, net	0	0	17	7
Mark-to-market adjustments on equity investments, net	(4)	(27)	11	23
Nonoperating special items, net	(4)	(27)	28	30
Mainline operating special items, net
Restructuring Cost and Reserve [Line Items]
Litigation reserve adjustments	0	0	77	0
Labor contract expenses	0	516	31	573
Severance expenses	3	0	8	13
Other operating special items, net	4	38	9	39
Operating special items, net	7	554	125	625
Mainline operating special items, net | Association of Professional Flight Attendants
Restructuring Cost and Reserve [Line Items]
Labor contract expenses		514
Mainline operating special items, net | American Airlines, Inc.
Restructuring Cost and Reserve [Line Items]
Litigation reserve adjustments	0	0	77	0
Labor contract expenses	0	516	31	573
Severance expenses	3	0	8	13
Other operating special items, net	4	38	9	39
Operating special items, net	$ 7	554	$ 125	$ 625
Mainline operating special items, net | American Airlines, Inc. | Association of Professional Flight Attendants
Restructuring Cost and Reserve [Line Items]
Labor contract expenses		$ 514