Transactions with Related Parties (Details) - USD ($) $ in Millions	Mar. 31, 2026	Dec. 31, 2025
Related Party Transaction [Line Items]
AAG’s wholly-owned subsidiaries	$ (3,610)	$ (2,840)
American Airlines, Inc.
Related Party Transaction [Line Items]
AAG’s wholly-owned subsidiaries	(3,479)	(2,717)
Total	10,067	9,896
American Airlines, Inc. | Total
Related Party Transaction [Line Items]
Total	10,067	9,896
American Airlines, Inc. | AAG
Related Party Transaction [Line Items]
AAG	12,146	11,938
American Airlines, Inc. | AAG's wholly-owned subsidiaries
Related Party Transaction [Line Items]
AAG’s wholly-owned subsidiaries	$ (2,079)	$ (2,042)