Revenue Recognition - Significant Categories of Reported Operating Revenues (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2026	Sep. 30, 2025	Sep. 30, 2026	Sep. 30, 2025
Segment Reporting, Entity-Wide Information Not Provided as Part of Reportable Segment, Product and Service, Revenue [Line Items]
Total operating revenues	$ 16,335	$ 13,691	$ 46,982	$ 40,634
American Airlines, Inc.
Segment Reporting, Entity-Wide Information Not Provided as Part of Reportable Segment, Product and Service, Revenue [Line Items]
Total operating revenues	16,334	13,688	46,979	40,628
Passenger
Segment Reporting, Entity-Wide Information Not Provided as Part of Reportable Segment, Product and Service, Revenue [Line Items]
Total operating revenues	14,900	12,471	42,609	36,985
Passenger \| American Airlines, Inc.
Segment Reporting, Entity-Wide Information Not Provided as Part of Reportable Segment, Product and Service, Revenue [Line Items]
Total operating revenues	14,900	12,471	42,609	36,985
Passenger travel
Segment Reporting, Entity-Wide Information Not Provided as Part of Reportable Segment, Product and Service, Revenue [Line Items]
Total operating revenues	13,761	11,402	39,372	34,004
Passenger travel \| American Airlines, Inc.
Segment Reporting, Entity-Wide Information Not Provided as Part of Reportable Segment, Product and Service, Revenue [Line Items]
Total operating revenues	13,761	11,402	39,372	34,004
Loyalty revenue - travel
Segment Reporting, Entity-Wide Information Not Provided as Part of Reportable Segment, Product and Service, Revenue [Line Items]
Total operating revenues	1,139	1,069	3,237	2,981
Loyalty revenue - travel \| American Airlines, Inc.
Segment Reporting, Entity-Wide Information Not Provided as Part of Reportable Segment, Product and Service, Revenue [Line Items]
Total operating revenues	1,139	1,069	3,237	2,981
Cargo
Segment Reporting, Entity-Wide Information Not Provided as Part of Reportable Segment, Product and Service, Revenue [Line Items]
Total operating revenues	274	212	761	612
Cargo \| American Airlines, Inc.
Segment Reporting, Entity-Wide Information Not Provided as Part of Reportable Segment, Product and Service, Revenue [Line Items]
Total operating revenues	274	212	761	612
Other
Segment Reporting, Entity-Wide Information Not Provided as Part of Reportable Segment, Product and Service, Revenue [Line Items]
Total operating revenues	1,161	1,008	3,612	3,037
Other \| American Airlines, Inc.
Segment Reporting, Entity-Wide Information Not Provided as Part of Reportable Segment, Product and Service, Revenue [Line Items]
Total operating revenues	1,160	1,005	3,609	3,031
Loyalty revenue - marketing services
Segment Reporting, Entity-Wide Information Not Provided as Part of Reportable Segment, Product and Service, Revenue [Line Items]
Total operating revenues	983	831	3,068	2,566
Loyalty revenue - marketing services \| American Airlines, Inc.
Segment Reporting, Entity-Wide Information Not Provided as Part of Reportable Segment, Product and Service, Revenue [Line Items]
Total operating revenues	983	831	3,068	2,566
Other revenue
Segment Reporting, Entity-Wide Information Not Provided as Part of Reportable Segment, Product and Service, Revenue [Line Items]
Total operating revenues	178	177	544	471
Other revenue \| American Airlines, Inc.
Segment Reporting, Entity-Wide Information Not Provided as Part of Reportable Segment, Product and Service, Revenue [Line Items]
Total operating revenues	$ 177	$ 174	$ 541	$ 465