Special Items, Net (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2026	Mar. 31, 2025
Restructuring Cost and Reserve [Line Items]
Mark-to-market adjustments on equity investments, net	$ 72	$ 29
Debt refinancing and extinguishment	54	19
Other nonoperating special items, net	9	0
Nonoperating special items, net	135	48
American Airlines, Inc.
Restructuring Cost and Reserve [Line Items]
Mark-to-market adjustments on equity investments, net	72	29
Debt refinancing and extinguishment	54	19
Other nonoperating special items, net	9	0
Nonoperating special items, net	135	48
Mainline operating special items, net
Restructuring Cost and Reserve [Line Items]
Litigation reserve adjustments	12	30
Labor contract expenses	2	31
Other operating special items, net	0	9
Operating special items, net	14	70
Mainline operating special items, net | American Airlines, Inc.
Restructuring Cost and Reserve [Line Items]
Litigation reserve adjustments	12	30
Labor contract expenses	2	31
Other operating special items, net	0	9
Operating special items, net	$ 14	$ 70