Revenue Recognition - Significant Contract Liabilities (Details) - USD ($) $ in Millions	Jun. 30, 2023	Dec. 31, 2022
Disaggregation of Revenue [Line Items]
Contract balances, liability	$ 17,906	$ 15,890
Loyalty program liability
Disaggregation of Revenue [Line Items]
Contract balances, liability	9,376	9,145
Air traffic liability
Disaggregation of Revenue [Line Items]
Contract balances, liability	8,530	6,745
American Airlines, Inc.
Disaggregation of Revenue [Line Items]
Contract balances, liability	17,906	15,890
American Airlines, Inc. | Loyalty program liability
Disaggregation of Revenue [Line Items]
Contract balances, liability	9,376	9,145
American Airlines, Inc. | Air traffic liability
Disaggregation of Revenue [Line Items]
Contract balances, liability	$ 8,530	$ 6,745