Basis of Presentation and Summary of Significant Accounting Policies - Passenger Revenue by Geographic Region (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023
Airline Destination Disclosure [Line Items]
Operating revenues	$ 54,633	$ 54,211	$ 52,788
Passenger
Airline Destination Disclosure [Line Items]
Operating revenues	49,643	49,586	48,512
Passenger | Domestic
Airline Destination Disclosure [Line Items]
Operating revenues	35,201	35,336	34,592
Passenger | Latin America
Airline Destination Disclosure [Line Items]
Operating revenues	6,444	6,560	6,719
Passenger | Atlantic
Airline Destination Disclosure [Line Items]
Operating revenues	6,583	6,445	6,205
Passenger | Pacific
Airline Destination Disclosure [Line Items]
Operating revenues	1,415	1,245	996
American Airlines, Inc.
Airline Destination Disclosure [Line Items]
Operating revenues	54,626	54,204	52,784
American Airlines, Inc. | Passenger
Airline Destination Disclosure [Line Items]
Operating revenues	49,643	49,586	48,512
American Airlines, Inc. | Passenger | Domestic
Airline Destination Disclosure [Line Items]
Operating revenues	35,201	35,336	34,592
American Airlines, Inc. | Passenger | Latin America
Airline Destination Disclosure [Line Items]
Operating revenues	6,444	6,560	6,719
American Airlines, Inc. | Passenger | Atlantic
Airline Destination Disclosure [Line Items]
Operating revenues	6,583	6,445	6,205
American Airlines, Inc. | Passenger | Pacific
Airline Destination Disclosure [Line Items]
Operating revenues	$ 1,415	$ 1,245	$ 996