Basis of Presentation and Summary of Significant Accounting Policies - Passenger Revenue by Geographic Region (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Airline Destination Disclosure [Line Items]
Operating revenues	$ 54,211	$ 52,788	$ 48,971
Passenger
Airline Destination Disclosure [Line Items]
Operating revenues	49,586	48,512	44,568
Passenger | Domestic
Airline Destination Disclosure [Line Items]
Operating revenues	35,336	34,592	32,911
Passenger | Latin America
Airline Destination Disclosure [Line Items]
Operating revenues	6,560	6,719	6,150
Passenger | Atlantic
Airline Destination Disclosure [Line Items]
Operating revenues	6,445	6,205	5,070
Passenger | Pacific
Airline Destination Disclosure [Line Items]
Operating revenues	1,245	996	437
American Airlines, Inc.
Airline Destination Disclosure [Line Items]
Operating revenues	54,204	52,784	48,965
American Airlines, Inc. | Passenger
Airline Destination Disclosure [Line Items]
Operating revenues	49,586	48,512	44,568
American Airlines, Inc. | Passenger | Domestic
Airline Destination Disclosure [Line Items]
Operating revenues	35,336	34,592	32,911
American Airlines, Inc. | Passenger | Latin America
Airline Destination Disclosure [Line Items]
Operating revenues	6,560	6,719	6,150
American Airlines, Inc. | Passenger | Atlantic
Airline Destination Disclosure [Line Items]
Operating revenues	6,445	6,205	5,070
American Airlines, Inc. | Passenger | Pacific
Airline Destination Disclosure [Line Items]
Operating revenues	$ 1,245	$ 996	$ 437