Debt - Summary of Availability under Revolving Credit Facilities (Details) - Revolving Credit Facility - USD ($) $ in Millions	Oct. 13, 2026	Oct. 11, 2024	Dec. 31, 2023
Line of Credit Facility [Line Items]
Line of credit facility, remaining borrowing capacity			$ 2,862
2013 Credit Facilities
Line of Credit Facility [Line Items]
Line of credit facility, remaining borrowing capacity			736
2013 Credit Facilities | Forecast
Line of Credit Facility [Line Items]
Line of credit facility, maximum borrowing capacity	$ 563	$ 736
2014 Credit Facilities
Line of Credit Facility [Line Items]
Line of credit facility, remaining borrowing capacity			1,631
2014 Credit Facilities | Forecast
Line of Credit Facility [Line Items]
Line of credit facility, maximum borrowing capacity	1,200	1,600
April 2016 Revolving Facility
Line of Credit Facility [Line Items]
Line of credit facility, remaining borrowing capacity			446
April 2016 Revolving Facility | Forecast
Line of Credit Facility [Line Items]
Line of credit facility, maximum borrowing capacity	342	446
Other short-term facility
Line of Credit Facility [Line Items]
Line of credit facility, remaining borrowing capacity			49
American Airlines, Inc.
Line of Credit Facility [Line Items]
Line of credit facility, remaining borrowing capacity			2,862
American Airlines, Inc. | Forecast
Line of Credit Facility [Line Items]
Line of credit facility, maximum borrowing capacity	2,200	2,800
American Airlines, Inc. | 2013 Credit Facilities
Line of Credit Facility [Line Items]
Line of credit facility, remaining borrowing capacity			736
American Airlines, Inc. | 2013 Credit Facilities | Forecast
Line of Credit Facility [Line Items]
Line of credit facility, maximum borrowing capacity	563	736
American Airlines, Inc. | 2014 Credit Facilities
Line of Credit Facility [Line Items]
Line of credit facility, remaining borrowing capacity			1,631
American Airlines, Inc. | 2014 Credit Facilities | Forecast
Line of Credit Facility [Line Items]
Line of credit facility, maximum borrowing capacity	1,200	1,600
American Airlines, Inc. | April 2016 Revolving Facility
Line of Credit Facility [Line Items]
Line of credit facility, remaining borrowing capacity			446
American Airlines, Inc. | April 2016 Revolving Facility | Forecast
Line of Credit Facility [Line Items]
Line of credit facility, maximum borrowing capacity	$ 342	$ 446
American Airlines, Inc. | Other short-term facility
Line of Credit Facility [Line Items]
Line of credit facility, remaining borrowing capacity			49
American Airlines, Inc. | Cargo Receivable Facility
Line of Credit Facility [Line Items]
Line of credit facility, remaining borrowing capacity			$ 49