Special Items, Net (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2025	Jun. 30, 2024	Jun. 30, 2025	Jun. 30, 2024
Restructuring Cost and Reserve [Line Items]
Debt refinancing, extinguishment and other, net	$ (2)	$ 7	$ 17	$ 7
Mark-to-market adjustments on equity investments, net	(14)	5	15	51
Nonoperating special items, net	(16)	12	32	58
American Airlines, Inc.
Restructuring Cost and Reserve [Line Items]
Debt refinancing, extinguishment and other, net	(2)	7	17	7
Mark-to-market adjustments on equity investments, net	(14)	5	15	51
Nonoperating special items, net	(16)	12	32	58
Mainline operating special items, net
Restructuring Cost and Reserve [Line Items]
Litigation reserve adjustments	47	0	77	0
Labor contract expenses	0	0	31	57
Severance expenses	0	0	5	13
Other operating special items, net	0	0	5	0
Operating special items, net	47	0	118	70
Mainline operating special items, net | American Airlines, Inc.
Restructuring Cost and Reserve [Line Items]
Litigation reserve adjustments	47	0	77	0
Labor contract expenses	0	0	31	57
Severance expenses	0	0	5	13
Other operating special items, net	0	0	5	0
Operating special items, net	$ 47	$ 0	$ 118	$ 70