Employee Benefit Plans - Schedule of Amounts Recognized in Consolidated Balance Sheets (Details) - USD ($) $ in Millions	Dec. 31, 2022	Dec. 31, 2021
Defined Benefit Plan Disclosure [Line Items]
Noncurrent liability	$ 2,837	$ 5,053
Pension Benefits
Defined Benefit Plan Disclosure [Line Items]
Current liability	4	7
Noncurrent liability	2,149	4,212
Total liabilities	2,153	4,219
Retiree Medical and  Other Postretirement Benefits
Defined Benefit Plan Disclosure [Line Items]
Current liability	85	90
Noncurrent liability	688	841
Total liabilities	773	931
American Airlines, Inc.
Defined Benefit Plan Disclosure [Line Items]
Noncurrent liability	2,811	5,020
American Airlines, Inc. | Pension Benefits
Defined Benefit Plan Disclosure [Line Items]
Current liability	4	7
Noncurrent liability	2,123	4,179
Total liabilities	2,127	4,186
American Airlines, Inc. | Retiree Medical and  Other Postretirement Benefits
Defined Benefit Plan Disclosure [Line Items]
Current liability	85	90
Noncurrent liability	688	841
Total liabilities	$ 773	$ 931