Special Items, Net (Details) $ in Millions	12 Months Ended
	Dec. 31, 2025 USD ($)	Dec. 31, 2024 USD ($) aircraft	Dec. 31, 2023 USD ($)
Restructuring Cost and Reserve [Line Items]
Operating special items, net	$ 162	$ 643	$ 979
Mark-to-market adjustments on equity investments, net	(40)	8	82
Debt refinancing and extinguishment	22	16	280
Other nonoperating special items, net	18	0	0
Nonoperating special items, net	0	24	362
Allied Pilots Association
Restructuring Cost and Reserve [Line Items]
Collective bargaining agreement, one-time payment			754
Adjustments to other benefit-related items			235
Mainline
Restructuring Cost and Reserve [Line Items]
Litigation reserve adjustments	77	0	0
Labor contract expenses	31	605	989
Severance expenses	44	13	23
A330 fleet-related adjustments	0	(42)	0
Other operating special items, net	7	34	(41)
Operating special items, net	159	610	971
A330 fleet-related adjustments	0	42	0
Mainline | Disposal Group, Disposed of by Sale, Not Discontinued Operations
Restructuring Cost and Reserve [Line Items]
A330 fleet-related adjustments		(42)
A330 fleet-related adjustments		42
Regional Carrier
Restructuring Cost and Reserve [Line Items]
Operating special items, net	3	33	8
Regional Carrier | Embraer ERJ145 Aircraft
Restructuring Cost and Reserve [Line Items]
Operating special items, net		$ 33
Number of aircrafts permanently parked | aircraft		43
American Airlines, Inc.
Restructuring Cost and Reserve [Line Items]
Operating special items, net	162	$ 643	971
Mark-to-market adjustments on equity investments, net	(40)	8	82
Debt refinancing and extinguishment	22	16	280
Other nonoperating special items, net	18	0	0
Nonoperating special items, net	0	24	362
American Airlines, Inc. | Allied Pilots Association
Restructuring Cost and Reserve [Line Items]
Collective bargaining agreement, one-time payment			754
Adjustments to other benefit-related items			235
American Airlines, Inc. | Mainline
Restructuring Cost and Reserve [Line Items]
Litigation reserve adjustments	77	0	0
Labor contract expenses	31	605	989
Severance expenses	44	13	23
A330 fleet-related adjustments	0	(42)	0
Other operating special items, net	7	34	(41)
Operating special items, net	159	610	971
A330 fleet-related adjustments	0	42	0
American Airlines, Inc. | Mainline | Disposal Group, Disposed of by Sale, Not Discontinued Operations
Restructuring Cost and Reserve [Line Items]
A330 fleet-related adjustments		(42)
A330 fleet-related adjustments		42
American Airlines, Inc. | Regional Carrier
Restructuring Cost and Reserve [Line Items]
Operating special items, net	$ 3	33	$ 0
American Airlines, Inc. | Regional Carrier | Embraer ERJ145 Aircraft
Restructuring Cost and Reserve [Line Items]
Operating special items, net		$ 33
Number of aircrafts permanently parked | aircraft		43