Revenue Recognition - Passenger Revenue by Geographic Region (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2025	Sep. 30, 2024	Sep. 30, 2025	Sep. 30, 2024
Airline Destination Disclosure [Line Items]
Total passenger revenue	$ 13,691	$ 13,647	$ 40,634	$ 40,551
American Airlines, Inc.
Airline Destination Disclosure [Line Items]
Total passenger revenue	13,688	13,645	40,628	40,546
Passenger
Airline Destination Disclosure [Line Items]
Total passenger revenue	12,471	12,523	36,985	37,184
Passenger | American Airlines, Inc.
Airline Destination Disclosure [Line Items]
Total passenger revenue	12,471	12,523	36,985	37,184
Passenger | Domestic
Airline Destination Disclosure [Line Items]
Total passenger revenue	8,723	8,681	26,010	26,285
Passenger | Domestic | American Airlines, Inc.
Airline Destination Disclosure [Line Items]
Total passenger revenue	8,723	8,681	26,010	26,285
Passenger | Latin America
Airline Destination Disclosure [Line Items]
Total passenger revenue	1,340	1,433	4,795	4,897
Passenger | Latin America | American Airlines, Inc.
Airline Destination Disclosure [Line Items]
Total passenger revenue	1,340	1,433	4,795	4,897
Passenger | Atlantic
Airline Destination Disclosure [Line Items]
Total passenger revenue	2,109	2,110	5,160	5,122
Passenger | Atlantic | American Airlines, Inc.
Airline Destination Disclosure [Line Items]
Total passenger revenue	2,109	2,110	5,160	5,122
Passenger | Pacific
Airline Destination Disclosure [Line Items]
Total passenger revenue	299	299	1,020	880
Passenger | Pacific | American Airlines, Inc.
Airline Destination Disclosure [Line Items]
Total passenger revenue	$ 299	$ 299	$ 1,020	$ 880