Debt - Summary of Availability under Revolving Credit Facilities (Details) - Revolving Credit Facility - USD ($) $ in Millions	Jun. 04, 2029	Dec. 31, 2024	Jun. 04, 2024	Mar. 31, 2024
Line of Credit Facility [Line Items]
Line of credit facility, remaining borrowing capacity		$ 3,289
Credit Facility 2013
Line of Credit Facility [Line Items]
Line of credit facility, remaining borrowing capacity		500
Credit Facility 2013 | Secured Debt
Line of Credit Facility [Line Items]
Line of credit facility, maximum borrowing capacity			$ 500
Long-term line of credit		0
Credit Facility 2014
Line of Credit Facility [Line Items]
Line of credit facility, remaining borrowing capacity		1,500
Credit Facility 2014 | Secured Debt
Line of Credit Facility [Line Items]
Line of credit facility, maximum borrowing capacity			1,500
Long-term line of credit		0
Credit Facility 2023
Line of Credit Facility [Line Items]
Line of credit facility, remaining borrowing capacity		890
Credit Facility 2023 | Secured Debt
Line of Credit Facility [Line Items]
Line of credit facility, maximum borrowing capacity			890
Long-term line of credit		0
Other facilities
Line of Credit Facility [Line Items]
Line of credit facility, remaining borrowing capacity		399
American Airlines, Inc.
Line of Credit Facility [Line Items]
Line of credit facility, remaining borrowing capacity		3,289
American Airlines, Inc. | Credit Facility 2013
Line of Credit Facility [Line Items]
Line of credit facility, remaining borrowing capacity		500
American Airlines, Inc. | Credit Facility 2013 | Secured Debt
Line of Credit Facility [Line Items]
Line of credit facility, maximum borrowing capacity			500
Long-term line of credit		0
American Airlines, Inc. | Credit Facility 2014
Line of Credit Facility [Line Items]
Line of credit facility, remaining borrowing capacity		1,500
American Airlines, Inc. | Credit Facility 2014 | Secured Debt
Line of Credit Facility [Line Items]
Line of credit facility, maximum borrowing capacity			1,500
Long-term line of credit		0
American Airlines, Inc. | Credit Facility 2023
Line of Credit Facility [Line Items]
Line of credit facility, remaining borrowing capacity		890
American Airlines, Inc. | Credit Facility 2023 | Secured Debt
Line of Credit Facility [Line Items]
Line of credit facility, maximum borrowing capacity			$ 890
Long-term line of credit		0
American Airlines, Inc. | Other facilities
Line of Credit Facility [Line Items]
Line of credit facility, remaining borrowing capacity		399
American Airlines, Inc. | Cargo Receivable Facility
Line of Credit Facility [Line Items]
Line of credit facility, remaining borrowing capacity		49
American Airlines, Inc. | 2013, 2014 and 2023 Credit Facilities | Forecast
Line of Credit Facility [Line Items]
Line of credit facility, remaining borrowing capacity	$ 2,900
American Airlines, Inc. | Other Revolving Facility
Line of Credit Facility [Line Items]
Line of credit facility, maximum borrowing capacity				$ 350
American Airlines, Inc. | Other Revolving Facility | Secured Debt
Line of Credit Facility [Line Items]
Long-term line of credit		$ 0