Debt - Summary of Availability under Revolving Credit Facilities (Details) - Revolving Credit Facility - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2025	Apr. 21, 2025	Apr. 20, 2025
Line of Credit Facility [Line Items]
Line of credit facility, remaining borrowing capacity	$ 3,397
2013, 2014 and 2023 Credit Facilities
Line of Credit Facility [Line Items]
Line of credit facility, remaining borrowing capacity		$ 3,000	$ 2,900
Long-term line of credit		0
Credit Facility 2013
Line of Credit Facility [Line Items]
Line of credit facility, remaining borrowing capacity	519
Credit Facility 2013 | Secured Debt
Line of Credit Facility [Line Items]
Long-term line of credit	0
Credit Facility 2014
Line of Credit Facility [Line Items]
Line of credit facility, remaining borrowing capacity	1,557
Credit Facility 2014 | Secured Debt
Line of Credit Facility [Line Items]
Long-term line of credit	0
Credit Facility 2023
Line of Credit Facility [Line Items]
Line of credit facility, remaining borrowing capacity	924
Credit Facility 2023 | Secured Debt
Line of Credit Facility [Line Items]
Long-term line of credit	0
Other facilities
Line of Credit Facility [Line Items]
Line of credit facility, remaining borrowing capacity	397
American Airlines, Inc.
Line of Credit Facility [Line Items]
Line of credit facility, remaining borrowing capacity	3,397
American Airlines, Inc. | 2013, 2014 and 2023 Credit Facilities
Line of Credit Facility [Line Items]
Line of credit facility, remaining borrowing capacity		3,000	$ 2,900
Long-term line of credit		$ 0
American Airlines, Inc. | Credit Facility 2013
Line of Credit Facility [Line Items]
Line of credit facility, remaining borrowing capacity	519
American Airlines, Inc. | Credit Facility 2013 | Secured Debt
Line of Credit Facility [Line Items]
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	1,557
American Airlines, Inc. | Credit Facility 2014 | Secured Debt
Line of Credit Facility [Line Items]
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	924
American Airlines, Inc. | Credit Facility 2023 | Secured Debt
Line of Credit Facility [Line Items]
Long-term line of credit	0
American Airlines, Inc. | Other facilities
Line of Credit Facility [Line Items]
Line of credit facility, remaining borrowing capacity	397
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]
Amount drawn	0
American Airlines, Inc. | Cargo Receivable Facility
Line of Credit Facility [Line Items]
Line of credit facility, remaining borrowing capacity	$ 47