Special Items, Net (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2024	Jun. 30, 2023
Restructuring Cost and Reserve [Line Items]
Operating special items, net	$ 0	$ 6	$ 70	$ 19
Mark-to-market adjustments on equity investments, net	5	11	51	11
Debt refinancing and extinguishment	7	17	7	34
Nonoperating special items, net	12	28	58	45
American Airlines, Inc.
Restructuring Cost and Reserve [Line Items]
Mark-to-market adjustments on equity investments, net	5	11	51	11
Debt refinancing and extinguishment	7	17	7	34
Nonoperating special items, net	12	28	58	45
Mainline operating special items, net
Restructuring Cost and Reserve [Line Items]
Labor contract expenses	0	0	57	0
Severance expenses	0	0	13	21
Other operating special items, net	0	0	0	(8)
Operating special items, net	0	0	70	13
Mainline operating special items, net | American Airlines, Inc.
Restructuring Cost and Reserve [Line Items]
Labor contract expenses	0	0	57	0
Severance expenses	0	0	13	21
Other operating special items, net	0	0	0	(8)
Operating special items, net	0	0	70	13
Regional operating special items, net
Restructuring Cost and Reserve [Line Items]
Operating special items, net	$ 0	$ 6	$ 0	$ 6