Debt - Special Facility Revenue Bonds (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Debt Instrument [Line Items]
Proceeds from issuance of long-term debt	$ 4,822	$ 1,069	$ 12,190
American Airlines, Inc.
Debt Instrument [Line Items]
Proceeds from issuance of long-term debt	$ 4,822	$ 1,069	$ 10,209