Debt - Schedule of Line of Credit (Details) $ in Millions	Jun. 30, 2023 USD ($)
Debt Instrument [Line Items]
Line of credit facility, remaining borrowing capacity	$ 2,863
American Airlines, Inc.
Debt Instrument [Line Items]
Line of credit facility, remaining borrowing capacity	2,863
Revolving Credit Facility | 2013 Revolving Facility
Debt Instrument [Line Items]
Line of credit facility, remaining borrowing capacity	736
Revolving Credit Facility | 2014 Revolving Facility
Debt Instrument [Line Items]
Line of credit facility, remaining borrowing capacity	1,631
Revolving Credit Facility | April 2016 Revolving Facility
Debt Instrument [Line Items]
Line of credit facility, remaining borrowing capacity	446
Revolving Credit Facility | Other short-term facility
Debt Instrument [Line Items]
Line of credit facility, remaining borrowing capacity	50
Revolving Credit Facility | American Airlines, Inc. | 2013 Revolving Facility
Debt Instrument [Line Items]
Line of credit facility, remaining borrowing capacity	736
Revolving Credit Facility | American Airlines, Inc. | 2014 Revolving Facility
Debt Instrument [Line Items]
Line of credit facility, remaining borrowing capacity	1,631
Revolving Credit Facility | American Airlines, Inc. | April 2016 Revolving Facility
Debt Instrument [Line Items]
Line of credit facility, remaining borrowing capacity	446
Revolving Credit Facility | American Airlines, Inc. | Other short-term facility
Debt Instrument [Line Items]
Line of credit facility, remaining borrowing capacity	$ 50