Debt - Schedule of Line of Credit (Details) - Revolving Credit Facility $ in Millions	Jun. 30, 2024 USD ($)
Debt Instrument [Line Items]
Total	$ 3,287
2013 Revolving Facility
Debt Instrument [Line Items]
Total	500
2014 Revolving Facility
Debt Instrument [Line Items]
Total	1,500
2023 Revolving Facility
Debt Instrument [Line Items]
Total	890
Other facilities
Debt Instrument [Line Items]
Total	397
American Airlines, Inc.
Debt Instrument [Line Items]
Total	3,287
American Airlines, Inc. | 2013 Revolving Facility
Debt Instrument [Line Items]
Total	500
American Airlines, Inc. | 2014 Revolving Facility
Debt Instrument [Line Items]
Total	1,500
American Airlines, Inc. | 2023 Revolving Facility
Debt Instrument [Line Items]
Total	890
American Airlines, Inc. | Other facilities
Debt Instrument [Line Items]
Total	$ 397