Revenue Recognition - Significant Contract Liabilities (Details) - USD ($) $ in Millions	Sep. 30, 2025	Dec. 31, 2024
Disaggregation of Revenue [Line Items]
Total	$ 18,606	$ 16,813
American Airlines, Inc.
Disaggregation of Revenue [Line Items]
Total	18,606	16,813
Loyalty program liability
Disaggregation of Revenue [Line Items]
Total	10,514	10,054
Loyalty program liability | American Airlines, Inc.
Disaggregation of Revenue [Line Items]
Total	10,514	10,054
Air traffic liability
Disaggregation of Revenue [Line Items]
Total	8,092	6,759
Air traffic liability | American Airlines, Inc.
Disaggregation of Revenue [Line Items]
Total	$ 8,092	$ 6,759