Revenue Recognition - Significant Categories of Reported Operating Revenues (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2025	Sep. 30, 2024	Sep. 30, 2025	Sep. 30, 2024
Revenue from External Customer [Line Items]
Total operating revenues	$ 13,691	$ 13,647	$ 40,634	$ 40,551
American Airlines, Inc.
Revenue from External Customer [Line Items]
Total operating revenues	13,688	13,645	40,628	40,546
Passenger
Revenue from External Customer [Line Items]
Total operating revenues	12,471	12,523	36,985	37,184
Passenger | American Airlines, Inc.
Revenue from External Customer [Line Items]
Total operating revenues	12,471	12,523	36,985	37,184
Passenger travel
Revenue from External Customer [Line Items]
Total operating revenues	11,402	11,539	34,004	34,334
Passenger travel | American Airlines, Inc.
Revenue from External Customer [Line Items]
Total operating revenues	11,402	11,539	34,004	34,334
Loyalty revenue - travel
Revenue from External Customer [Line Items]
Total operating revenues	1,069	984	2,981	2,850
Loyalty revenue - travel | American Airlines, Inc.
Revenue from External Customer [Line Items]
Total operating revenues	1,069	984	2,981	2,850
Cargo
Revenue from External Customer [Line Items]
Total operating revenues	212	202	612	584
Cargo | American Airlines, Inc.
Revenue from External Customer [Line Items]
Total operating revenues	212	202	612	584
Other
Revenue from External Customer [Line Items]
Total operating revenues	1,008	922	3,037	2,783
Other | American Airlines, Inc.
Revenue from External Customer [Line Items]
Total operating revenues	1,005	920	3,031	2,778
Loyalty revenue - marketing services
Revenue from External Customer [Line Items]
Total operating revenues	831	779	2,566	2,363
Loyalty revenue - marketing services | American Airlines, Inc.
Revenue from External Customer [Line Items]
Total operating revenues	831	779	2,566	2,363
Other revenue
Revenue from External Customer [Line Items]
Total operating revenues	177	143	471	420
Other revenue | American Airlines, Inc.
Revenue from External Customer [Line Items]
Total operating revenues	$ 174	$ 141	$ 465	$ 415