Revenue Recognition - Passenger Revenue by Geographic Region (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2026	Mar. 31, 2025
Airline Destination Disclosure [Line Items]
Total passenger revenue	$ 13,912	$ 12,551
American Airlines, Inc.
Airline Destination Disclosure [Line Items]
Total passenger revenue	13,911	12,549
Passenger
Airline Destination Disclosure [Line Items]
Total passenger revenue	12,495	11,391
Passenger | American Airlines, Inc.
Airline Destination Disclosure [Line Items]
Total passenger revenue	12,495	11,391
Passenger | Domestic
Airline Destination Disclosure [Line Items]
Total passenger revenue	8,990	8,127
Passenger | Domestic | American Airlines, Inc.
Airline Destination Disclosure [Line Items]
Total passenger revenue	8,990	8,127
Passenger | Latin America
Airline Destination Disclosure [Line Items]
Total passenger revenue	1,963	1,906
Passenger | Latin America | American Airlines, Inc.
Airline Destination Disclosure [Line Items]
Total passenger revenue	1,963	1,906
Passenger | Atlantic
Airline Destination Disclosure [Line Items]
Total passenger revenue	1,102	965
Passenger | Atlantic | American Airlines, Inc.
Airline Destination Disclosure [Line Items]
Total passenger revenue	1,102	965
Passenger | Pacific
Airline Destination Disclosure [Line Items]
Total passenger revenue	440	393
Passenger | Pacific | American Airlines, Inc.
Airline Destination Disclosure [Line Items]
Total passenger revenue	$ 440	$ 393