Revenue Recognition - Passenger Revenue by Geographic Region (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
Airline Destination Disclosure [Line Items]
Operating revenues	$ 7,478	$ 1,622	$ 11,486	$ 10,137
Passenger
Airline Destination Disclosure [Line Items]
Operating revenues	6,545	1,108	9,724	8,788
Passenger | Domestic
Airline Destination Disclosure [Line Items]
Operating revenues	5,444	1,026	8,099	6,806
Passenger | Latin America
Airline Destination Disclosure [Line Items]
Operating revenues	936	34	1,417	1,214
Passenger | Atlantic
Airline Destination Disclosure [Line Items]
Operating revenues	125	42	147	565
Passenger | Pacific
Airline Destination Disclosure [Line Items]
Operating revenues	40	6	61	203
American Airlines, Inc.
Airline Destination Disclosure [Line Items]
Operating revenues	7,478	1,622	11,485	10,136
American Airlines, Inc. | Passenger
Airline Destination Disclosure [Line Items]
Operating revenues	6,545	1,108	9,724	8,788
American Airlines, Inc. | Passenger | Domestic
Airline Destination Disclosure [Line Items]
Operating revenues	5,444	1,026	8,099	6,806
American Airlines, Inc. | Passenger | Latin America
Airline Destination Disclosure [Line Items]
Operating revenues	936	34	1,417	1,214
American Airlines, Inc. | Passenger | Atlantic
Airline Destination Disclosure [Line Items]
Operating revenues	125	42	147	565
American Airlines, Inc. | Passenger | Pacific
Airline Destination Disclosure [Line Items]
Operating revenues	$ 40	$ 6	$ 61	$ 203