Debt - Schedule of Line of Credit (Details) - Revolving Credit Facility $ in Millions	Mar. 31, 2024 USD ($)
Debt Instrument [Line Items]
Total	$ 3,211
2013 Revolving Facility
Debt Instrument [Line Items]
Total	736
2014 Revolving Facility
Debt Instrument [Line Items]
Total	1,631
April 2016 Revolving Facility
Debt Instrument [Line Items]
Total	446
Other facilities
Debt Instrument [Line Items]
Total	398
American Airlines, Inc.
Debt Instrument [Line Items]
Total	3,211
American Airlines, Inc. | 2013 Revolving Facility
Debt Instrument [Line Items]
Total	736
American Airlines, Inc. | 2014 Revolving Facility
Debt Instrument [Line Items]
Total	1,631
American Airlines, Inc. | April 2016 Revolving Facility
Debt Instrument [Line Items]
Total	446
American Airlines, Inc. | Other facilities
Debt Instrument [Line Items]
Total	$ 398