Debt - Schedule of Line of Credit (Details) - Revolving Credit Facility - USD ($) $ in Millions	6 Months Ended
	Jun. 30, 2025	Apr. 21, 2025	Apr. 20, 2025
Debt Instrument [Line Items]
Total	$ 3,400
2013, 2014 and 2023 Credit Facilities
Debt Instrument [Line Items]
Total		$ 3,000	$ 2,900
Amount outstanding		0
2013 Revolving Facility
Debt Instrument [Line Items]
Total	519
2014 Revolving Facility
Debt Instrument [Line Items]
Total	1,557
2023 Revolving Facility
Debt Instrument [Line Items]
Total	924
Other facilities
Debt Instrument [Line Items]
Total	400
American Airlines, Inc.
Debt Instrument [Line Items]
Total	3,400
American Airlines, Inc. | 2013, 2014 and 2023 Credit Facilities
Debt Instrument [Line Items]
Total		3,000	$ 2,900
Amount outstanding		$ 0
American Airlines, Inc. | 2013 Revolving Facility
Debt Instrument [Line Items]
Total	519
American Airlines, Inc. | 2014 Revolving Facility
Debt Instrument [Line Items]
Total	1,557
American Airlines, Inc. | 2023 Revolving Facility
Debt Instrument [Line Items]
Total	924
American Airlines, Inc. | Other facilities
Debt Instrument [Line Items]
Total	400
American Airlines, Inc. | Other Revolving Facility
Debt Instrument [Line Items]
Line of credit facility, aggregate commitments	350
American Airlines, Inc. | Other Revolving Facility | Secured Debt
Debt Instrument [Line Items]
Amount drawn	0
American Airlines, Inc. | Cargo Receivable Facility
Debt Instrument [Line Items]
Total	$ 50