Special Items, Net (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2025	Mar. 31, 2024
Restructuring Cost and Reserve [Line Items]
Mark-to-market adjustments on equity investments, net	$ 29	$ 46
Debt refinancing and extinguishment	19	0
Nonoperating special items, net	48	46
American Airlines, Inc.
Restructuring Cost and Reserve [Line Items]
Mark-to-market adjustments on equity investments, net	29	46
Debt refinancing and extinguishment	19	0
Nonoperating special items, net	48	46
Mainline operating special items, net
Restructuring Cost and Reserve [Line Items]
Labor contract expenses	31	57
Litigation reserve adjustments	30	0
Severance expenses	4	13
Other operating special items, net	5	0
Operating special items, net	70	70
Mainline operating special items, net | American Airlines, Inc.
Restructuring Cost and Reserve [Line Items]
Labor contract expenses	31	57
Litigation reserve adjustments	30	0
Severance expenses	4	13
Other operating special items, net	5	0
Operating special items, net	$ 70	$ 70