Debt - Summary of Availability under Revolving Credit Facilities (Details) - USD ($)	Jan. 02, 2022	Dec. 31, 2021
Line of Credit Facility [Line Items]
Line of credit facility, remaining borrowing capacity		$ 3,411,000,000
Revolving Credit Facility
Line of Credit Facility [Line Items]
Line of credit facility, remaining borrowing capacity		2,800,000,000
Revolving Credit Facility | 2013 Credit  Facilities
Line of Credit Facility [Line Items]
Line of credit facility, remaining borrowing capacity		750,000,000
Revolving Credit Facility | 2014 Credit  Facilities
Line of Credit Facility [Line Items]
Line of credit facility, remaining borrowing capacity		1,643,000,000
Revolving Credit Facility | April 2016 Credit Facilities
Line of Credit Facility [Line Items]
Line of credit facility, remaining borrowing capacity		450,000,000
Revolving Credit Facility | Short-term Revolving and Other Facilities
Line of Credit Facility [Line Items]
Line of credit facility, remaining borrowing capacity		568,000,000
American Airlines, Inc.
Line of Credit Facility [Line Items]
Line of credit facility, remaining borrowing capacity		3,411,000,000
American Airlines, Inc. | Revolving Credit Facility | 2013 Credit  Facilities
Line of Credit Facility [Line Items]
Line of credit facility, remaining borrowing capacity		750,000,000
American Airlines, Inc. | Revolving Credit Facility | 2014 Credit  Facilities
Line of Credit Facility [Line Items]
Line of credit facility, remaining borrowing capacity		1,643,000,000
American Airlines, Inc. | Revolving Credit Facility | April 2016 Credit Facilities
Line of Credit Facility [Line Items]
Line of credit facility, remaining borrowing capacity		450,000,000
American Airlines, Inc. | Revolving Credit Facility | Short-term Revolving and Other Facilities
Line of Credit Facility [Line Items]
Line of credit facility, remaining borrowing capacity		568,000,000
American Airlines, Inc. | Revolving Credit Facility | Other Short-term Revolving Facility
Line of Credit Facility [Line Items]
Line of credit facility, remaining borrowing capacity		500,000,000
American Airlines, Inc. | Revolving Credit Facility | Other Short-term Revolving Facility | Subsequent Event
Line of Credit Facility [Line Items]
Line of credit facility, remaining borrowing capacity	$ 150,000,000
American Airlines, Inc. | Revolving Credit Facility | Cargo Receivable Facility
Line of Credit Facility [Line Items]
Line of credit facility, remaining borrowing capacity		$ 68,000,000