Revenue Recognition - Significant Categories of Reported Operating Revenues (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2024	Jun. 30, 2023
Revenue from External Customer [Line Items]
Total operating revenues	$ 14,334	$ 14,055	$ 26,904	$ 26,244
American Airlines, Inc.
Revenue from External Customer [Line Items]
Total operating revenues	14,333	14,054	26,902	26,242
Passenger
Revenue from External Customer [Line Items]
Total operating revenues	13,202	12,978	24,661	24,081
Passenger | American Airlines, Inc.
Revenue from External Customer [Line Items]
Total operating revenues	13,202	12,978	24,661	24,081
Passenger travel
Revenue from External Customer [Line Items]
Total operating revenues	12,212	12,057	22,795	22,348
Passenger travel | American Airlines, Inc.
Revenue from External Customer [Line Items]
Total operating revenues	12,212	12,057	22,795	22,348
Loyalty revenue - travel
Revenue from External Customer [Line Items]
Total operating revenues	990	921	1,866	1,733
Loyalty revenue - travel | American Airlines, Inc.
Revenue from External Customer [Line Items]
Total operating revenues	990	921	1,866	1,733
Cargo
Revenue from External Customer [Line Items]
Total operating revenues	195	197	382	420
Cargo | American Airlines, Inc.
Revenue from External Customer [Line Items]
Total operating revenues	195	197	382	420
Other
Revenue from External Customer [Line Items]
Total operating revenues	937	880	1,861	1,743
Other | American Airlines, Inc.
Revenue from External Customer [Line Items]
Total operating revenues	936	879	1,859	1,741
Loyalty revenue - marketing services
Revenue from External Customer [Line Items]
Total operating revenues	799	741	1,584	1,463
Loyalty revenue - marketing services | American Airlines, Inc.
Revenue from External Customer [Line Items]
Total operating revenues	799	741	1,585	1,463
Other revenue
Revenue from External Customer [Line Items]
Total operating revenues	138	139	277	280
Other revenue | American Airlines, Inc.
Revenue from External Customer [Line Items]
Total operating revenues	$ 137	$ 138	$ 274	$ 278