Revenue Recognition - Passenger Revenue by Geographic Region (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Airline Destination Disclosure [Line Items]
Operating revenues	$ 4,008	$ 8,515
Passenger
Airline Destination Disclosure [Line Items]
Operating revenues	3,179	7,681
Passenger | Domestic
Airline Destination Disclosure [Line Items]
Operating revenues	2,655	5,780
Passenger | Latin America
Airline Destination Disclosure [Line Items]
Operating revenues	482	1,180
Passenger | Atlantic
Airline Destination Disclosure [Line Items]
Operating revenues	22	523
Passenger | Pacific
Airline Destination Disclosure [Line Items]
Operating revenues	20	198
American Airlines, Inc.
Airline Destination Disclosure [Line Items]
Operating revenues	4,008	8,514
American Airlines, Inc. | Passenger
Airline Destination Disclosure [Line Items]
Operating revenues	3,179	7,681
American Airlines, Inc. | Passenger | Domestic
Airline Destination Disclosure [Line Items]
Operating revenues	2,655	5,780
American Airlines, Inc. | Passenger | Latin America
Airline Destination Disclosure [Line Items]
Operating revenues	482	1,180
American Airlines, Inc. | Passenger | Atlantic
Airline Destination Disclosure [Line Items]
Operating revenues	22	523
American Airlines, Inc. | Passenger | Pacific
Airline Destination Disclosure [Line Items]
Operating revenues	$ 20	$ 198