Revenue Recognition - Significant Contract Liabilities (Details) - USD ($) $ in Millions	Mar. 31, 2026	Dec. 31, 2025
Disaggregation of Revenue [Line Items]
Total	$ 21,617	$ 17,722
American Airlines, Inc.
Disaggregation of Revenue [Line Items]
Total	21,617	17,722
Loyalty program liability
Disaggregation of Revenue [Line Items]
Total	11,586	10,564
Loyalty program liability | American Airlines, Inc.
Disaggregation of Revenue [Line Items]
Total	11,586	10,564
Air traffic liability
Disaggregation of Revenue [Line Items]
Total	10,031	7,158
Air traffic liability | American Airlines, Inc.
Disaggregation of Revenue [Line Items]
Total	$ 10,031	$ 7,158