Debt - Schedule of Line of Credit (Details) - Revolving Credit Facility $ in Millions	3 Months Ended
	Mar. 31, 2026 USD ($)
Debt Instrument [Line Items]
Total	$ 3,510
2013 Revolving Facility
Debt Instrument [Line Items]
Total	363
2014 Revolving Facility
Debt Instrument [Line Items]
Total	1,296
2023 Revolving Facility
Debt Instrument [Line Items]
Total	1,451
Other facilities
Debt Instrument [Line Items]
Total	400
American Airlines, Inc.
Debt Instrument [Line Items]
Total	3,510
American Airlines, Inc. | 2013 Revolving Facility
Debt Instrument [Line Items]
Total	363
American Airlines, Inc. | 2014 Revolving Facility
Debt Instrument [Line Items]
Total	1,296
American Airlines, Inc. | 2023 Revolving Facility
Debt Instrument [Line Items]
Total	1,451
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