Basis of Presentation and Summary of Significant Accounting Policies - Significant Categories of Reported Operating Revenues (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Revenue from External Customer [Line Items]
Total operating revenues	$ 54,211	$ 52,788	$ 48,971
Passenger
Revenue from External Customer [Line Items]
Total operating revenues	49,586	48,512	44,568
Passenger travel
Revenue from External Customer [Line Items]
Total operating revenues	45,743	44,914	41,425
Loyalty revenue - travel
Revenue from External Customer [Line Items]
Total operating revenues	3,843	3,598	3,143
Cargo
Revenue from External Customer [Line Items]
Total operating revenues	804	812	1,233
Other
Revenue from External Customer [Line Items]
Total operating revenues	3,821	3,464	3,170
Loyalty revenue - marketing services
Revenue from External Customer [Line Items]
Total operating revenues	3,257	2,929	2,657
Other revenue
Revenue from External Customer [Line Items]
Total operating revenues	564	535	513
American Airlines, Inc.
Revenue from External Customer [Line Items]
Total operating revenues	54,204	52,784	48,965
American Airlines, Inc. | Passenger
Revenue from External Customer [Line Items]
Total operating revenues	49,586	48,512	44,568
American Airlines, Inc. | Passenger travel
Revenue from External Customer [Line Items]
Total operating revenues	45,743	44,914	41,425
American Airlines, Inc. | Loyalty revenue - travel
Revenue from External Customer [Line Items]
Total operating revenues	3,843	3,598	3,143
American Airlines, Inc. | Cargo
Revenue from External Customer [Line Items]
Total operating revenues	804	812	1,233
American Airlines, Inc. | Other
Revenue from External Customer [Line Items]
Total operating revenues	3,814	3,460	3,164
American Airlines, Inc. | Loyalty revenue - marketing services
Revenue from External Customer [Line Items]
Total operating revenues	3,257	2,929	2,657
American Airlines, Inc. | Other revenue
Revenue from External Customer [Line Items]
Total operating revenues	$ 557	$ 531	$ 507