Revenue Recognition - Passenger Revenue by Geographic Region (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Airline Destination Disclosure [Line Items]
Operating revenues	$ 3,173	$ 11,911	$ 13,309	$ 34,455
Passenger
Airline Destination Disclosure [Line Items]
Operating revenues	2,540	10,995	11,328	31,663
Passenger | Domestic
Airline Destination Disclosure [Line Items]
Operating revenues	2,296	7,814	9,102	23,048
Passenger | Latin America
Airline Destination Disclosure [Line Items]
Operating revenues	172	1,218	1,386	3,829
Passenger | Atlantic
Airline Destination Disclosure [Line Items]
Operating revenues	56	1,596	621	3,677
Passenger | Pacific
Airline Destination Disclosure [Line Items]
Operating revenues	16	367	219	1,109
American Airlines, Inc.
Airline Destination Disclosure [Line Items]
Operating revenues	3,172	11,910	13,308	34,449
American Airlines, Inc. | Passenger
Airline Destination Disclosure [Line Items]
Operating revenues	2,540	10,995	11,328	31,663
American Airlines, Inc. | Passenger | Domestic
Airline Destination Disclosure [Line Items]
Operating revenues	2,296	7,814	9,102	23,048
American Airlines, Inc. | Passenger | Latin America
Airline Destination Disclosure [Line Items]
Operating revenues	172	1,218	1,386	3,829
American Airlines, Inc. | Passenger | Atlantic
Airline Destination Disclosure [Line Items]
Operating revenues	56	1,596	621	3,677
American Airlines, Inc. | Passenger | Pacific
Airline Destination Disclosure [Line Items]
Operating revenues	$ 16	$ 367	$ 219	$ 1,109