Basis of Presentation and Summary of Significant Accounting Policies - Passenger Revenue by Geographic Region (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Airline Destination Disclosure [Line Items]
Operating revenues	$ 52,788	$ 48,971	$ 29,882
Passenger
Airline Destination Disclosure [Line Items]
Operating revenues	48,512	44,568	26,063
Passenger | Domestic
Airline Destination Disclosure [Line Items]
Operating revenues	34,592	32,911	21,453
Passenger | Latin America
Airline Destination Disclosure [Line Items]
Operating revenues	6,719	6,150	3,506
Passenger | Atlantic
Airline Destination Disclosure [Line Items]
Operating revenues	6,205	5,070	965
Passenger | Pacific
Airline Destination Disclosure [Line Items]
Operating revenues	996	437	139
American Airlines, Inc.
Airline Destination Disclosure [Line Items]
Operating revenues	52,784	48,965	29,880
American Airlines, Inc. | Passenger
Airline Destination Disclosure [Line Items]
Operating revenues	48,512	44,568	26,063
American Airlines, Inc. | Passenger | Domestic
Airline Destination Disclosure [Line Items]
Operating revenues	34,592	32,911	21,453
American Airlines, Inc. | Passenger | Latin America
Airline Destination Disclosure [Line Items]
Operating revenues	6,719	6,150	3,506
American Airlines, Inc. | Passenger | Atlantic
Airline Destination Disclosure [Line Items]
Operating revenues	6,205	5,070	965
American Airlines, Inc. | Passenger | Pacific
Airline Destination Disclosure [Line Items]
Operating revenues	$ 996	$ 437	$ 139