Basis of Presentation and Summary of Significant Accounting Policies - Passenger Revenue by Geographic Region (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Airline Destination Disclosure [Line Items]
Operating revenues	$ 48,971	$ 29,882	$ 17,337
Passenger
Airline Destination Disclosure [Line Items]
Operating revenues	44,568	26,063	14,518
Passenger | Domestic
Airline Destination Disclosure [Line Items]
Operating revenues	32,911	21,453	11,765
Passenger | Latin America
Airline Destination Disclosure [Line Items]
Operating revenues	6,150	3,506	1,852
Passenger | Atlantic
Airline Destination Disclosure [Line Items]
Operating revenues	5,070	965	654
Passenger | Pacific
Airline Destination Disclosure [Line Items]
Operating revenues	437	139	247
American Airlines, Inc.
Airline Destination Disclosure [Line Items]
Operating revenues	48,965	29,880	17,335
American Airlines, Inc. | Passenger
Airline Destination Disclosure [Line Items]
Operating revenues	44,568	26,063	14,518
American Airlines, Inc. | Passenger | Domestic
Airline Destination Disclosure [Line Items]
Operating revenues	32,911	21,453	11,765
American Airlines, Inc. | Passenger | Latin America
Airline Destination Disclosure [Line Items]
Operating revenues	6,150	3,506	1,852
American Airlines, Inc. | Passenger | Atlantic
Airline Destination Disclosure [Line Items]
Operating revenues	5,070	965	654
American Airlines, Inc. | Passenger | Pacific
Airline Destination Disclosure [Line Items]
Operating revenues	$ 437	$ 139	$ 247