Revenue Recognition - Passenger Revenue by Geographic Region (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Airline Destination Disclosure [Line Items]
Total passenger revenue	$ 12,570	$ 12,189
American Airlines, Inc.
Airline Destination Disclosure [Line Items]
Total passenger revenue	12,569	12,188
Passenger
Airline Destination Disclosure [Line Items]
Total passenger revenue	11,458	11,103
Passenger | American Airlines, Inc.
Airline Destination Disclosure [Line Items]
Total passenger revenue	11,458	11,103
Passenger | Domestic
Airline Destination Disclosure [Line Items]
Total passenger revenue	8,262	8,037
Passenger | Domestic | American Airlines, Inc.
Airline Destination Disclosure [Line Items]
Total passenger revenue	8,262	8,037
Passenger | Latin America
Airline Destination Disclosure [Line Items]
Total passenger revenue	1,902	1,915
Passenger | Latin America | American Airlines, Inc.
Airline Destination Disclosure [Line Items]
Total passenger revenue	1,902	1,915
Passenger | Atlantic
Airline Destination Disclosure [Line Items]
Total passenger revenue	992	931
Passenger | Atlantic | American Airlines, Inc.
Airline Destination Disclosure [Line Items]
Total passenger revenue	992	931
Passenger | Pacific
Airline Destination Disclosure [Line Items]
Total passenger revenue	302	220
Passenger | Pacific | American Airlines, Inc.
Airline Destination Disclosure [Line Items]
Total passenger revenue	$ 302	$ 220