Revenue Recognition - Significant Contract Liabilities (Details) - USD ($) $ in Millions	Mar. 31, 2024	Dec. 31, 2023
Disaggregation of Revenue [Line Items]
Total	$ 18,138	$ 15,527
American Airlines, Inc.
Disaggregation of Revenue [Line Items]
Total	18,138	15,527
Loyalty program liability
Disaggregation of Revenue [Line Items]
Total	9,612	9,327
Loyalty program liability | American Airlines, Inc.
Disaggregation of Revenue [Line Items]
Total	9,612	9,327
Air traffic liability
Disaggregation of Revenue [Line Items]
Total	8,526	6,200
Air traffic liability | American Airlines, Inc.
Disaggregation of Revenue [Line Items]
Total	$ 8,526	$ 6,200