Revenue Recognition - Significant Contract Liabilities (Details) - USD ($) $ in Millions	Sep. 30, 2023	Dec. 31, 2022
Disaggregation of Revenue [Line Items]
Total	$ 16,998	$ 15,890
American Airlines, Inc.
Disaggregation of Revenue [Line Items]
Total	16,998	15,890
Loyalty program liability
Disaggregation of Revenue [Line Items]
Total	9,325	9,145
Loyalty program liability | American Airlines, Inc.
Disaggregation of Revenue [Line Items]
Total	9,325	9,145
Air traffic liability
Disaggregation of Revenue [Line Items]
Total	7,673	6,745
Air traffic liability | American Airlines, Inc.
Disaggregation of Revenue [Line Items]
Total	$ 7,673	$ 6,745