Revenue Recognition - Significant Categories of Reported Operating Revenues (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2025	Jun. 30, 2024	Jun. 30, 2025	Jun. 30, 2024
Revenue from External Customer [Line Items]
Total operating revenues	$ 14,392	$ 14,334	$ 26,943	$ 26,904
American Airlines, Inc.
Revenue from External Customer [Line Items]
Total operating revenues	14,390	14,333	26,940	26,902
Passenger
Revenue from External Customer [Line Items]
Total operating revenues	13,123	13,202	24,514	24,661
Passenger | American Airlines, Inc.
Revenue from External Customer [Line Items]
Total operating revenues	13,123	13,202	24,514	24,661
Passenger travel
Revenue from External Customer [Line Items]
Total operating revenues	12,126	12,212	22,601	22,795
Passenger travel | American Airlines, Inc.
Revenue from External Customer [Line Items]
Total operating revenues	12,126	12,212	22,601	22,795
Loyalty revenue - travel
Revenue from External Customer [Line Items]
Total operating revenues	997	990	1,913	1,866
Loyalty revenue - travel | American Airlines, Inc.
Revenue from External Customer [Line Items]
Total operating revenues	997	990	1,913	1,866
Cargo
Revenue from External Customer [Line Items]
Total operating revenues	211	195	400	382
Cargo | American Airlines, Inc.
Revenue from External Customer [Line Items]
Total operating revenues	211	195	400	382
Other
Revenue from External Customer [Line Items]
Total operating revenues	1,058	937	2,029	1,861
Other | American Airlines, Inc.
Revenue from External Customer [Line Items]
Total operating revenues	1,056	936	2,026	1,859
Loyalty revenue - marketing services
Revenue from External Customer [Line Items]
Total operating revenues	912	799	1,735	1,584
Loyalty revenue - marketing services | American Airlines, Inc.
Revenue from External Customer [Line Items]
Total operating revenues	912	799	1,735	1,585
Other revenue
Revenue from External Customer [Line Items]
Total operating revenues	146	138	294	277
Other revenue | American Airlines, Inc.
Revenue from External Customer [Line Items]
Total operating revenues	$ 144	$ 137	$ 291	$ 274