Basis of Presentation and Summary of Significant Accounting Policies - Passenger Revenue by Geographic Region (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Airline Destination Disclosure [Line Items]
Operating revenues	$ 29,882	$ 17,337	$ 45,768
Passenger
Airline Destination Disclosure [Line Items]
Operating revenues	26,063	14,518	42,010
Passenger | Domestic
Airline Destination Disclosure [Line Items]
Operating revenues	21,453	11,765	30,881
Passenger | Latin America
Airline Destination Disclosure [Line Items]
Operating revenues	3,506	1,852	5,047
Passenger | Atlantic
Airline Destination Disclosure [Line Items]
Operating revenues	965	654	4,624
Passenger | Pacific
Airline Destination Disclosure [Line Items]
Operating revenues	139	247	1,458
American Airlines, Inc.
Airline Destination Disclosure [Line Items]
Operating revenues	29,880	17,335	45,761
American Airlines, Inc. | Passenger
Airline Destination Disclosure [Line Items]
Operating revenues	26,063	14,518	42,010
American Airlines, Inc. | Passenger | Domestic
Airline Destination Disclosure [Line Items]
Operating revenues	21,453	11,765	30,881
American Airlines, Inc. | Passenger | Latin America
Airline Destination Disclosure [Line Items]
Operating revenues	3,506	1,852	5,047
American Airlines, Inc. | Passenger | Atlantic
Airline Destination Disclosure [Line Items]
Operating revenues	965	654	4,624
American Airlines, Inc. | Passenger | Pacific
Airline Destination Disclosure [Line Items]
Operating revenues	$ 139	$ 247	$ 1,458