Revenue Recognition - Significant Contract Liabilities (Details) - USD ($) $ in Millions	Jun. 30, 2022	Dec. 31, 2021
Disaggregation of Revenue [Line Items]
Contract balances, liability	$ 18,223	$ 15,222
Loyalty program liability
Disaggregation of Revenue [Line Items]
Contract balances, liability	9,254	9,135
Air traffic liability
Disaggregation of Revenue [Line Items]
Contract balances, liability	8,969	6,087
American Airlines, Inc.
Disaggregation of Revenue [Line Items]
Contract balances, liability	18,223	15,222
American Airlines, Inc. | Loyalty program liability
Disaggregation of Revenue [Line Items]
Contract balances, liability	9,254	9,135
American Airlines, Inc. | Air traffic liability
Disaggregation of Revenue [Line Items]
Contract balances, liability	$ 8,969	$ 6,087