Revenue Recognition - Significant Categories of Reported Operating Revenues (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2026	Jun. 30, 2025	Jun. 30, 2026	Jun. 30, 2025
Segment Reporting, Entity-Wide Information Not Provided as Part of Reportable Segment, Product and Service, Revenue [Line Items]
Total operating revenues	$ 16,735	$ 14,392	$ 30,647	$ 26,943
American Airlines, Inc.
Segment Reporting, Entity-Wide Information Not Provided as Part of Reportable Segment, Product and Service, Revenue [Line Items]
Total operating revenues	16,734	14,390	30,645	26,940
Passenger
Segment Reporting, Entity-Wide Information Not Provided as Part of Reportable Segment, Product and Service, Revenue [Line Items]
Total operating revenues	15,214	13,123	27,709	24,514
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	15,214	13,123	27,709	24,514
Passenger travel
Segment Reporting, Entity-Wide Information Not Provided as Part of Reportable Segment, Product and Service, Revenue [Line Items]
Total operating revenues	14,095	12,126	25,611	22,601
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	14,095	12,126	25,611	22,601
Loyalty revenue - travel
Segment Reporting, Entity-Wide Information Not Provided as Part of Reportable Segment, Product and Service, Revenue [Line Items]
Total operating revenues	1,119	997	2,098	1,913
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	1,119	997	2,098	1,913
Cargo
Segment Reporting, Entity-Wide Information Not Provided as Part of Reportable Segment, Product and Service, Revenue [Line Items]
Total operating revenues	273	211	487	400
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	273	211	487	400
Other
Segment Reporting, Entity-Wide Information Not Provided as Part of Reportable Segment, Product and Service, Revenue [Line Items]
Total operating revenues	1,248	1,058	2,451	2,029
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	1,247	1,056	2,449	2,026
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	1,058	912	2,085	1,735
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	1,058	912	2,085	1,735
Other revenue
Segment Reporting, Entity-Wide Information Not Provided as Part of Reportable Segment, Product and Service, Revenue [Line Items]
Total operating revenues	190	146	366	294
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	$ 189	$ 144	$ 364	$ 291