Debt - EETCs (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Debt Instrument [Line Items]
Proceeds from issuance of long-term debt	$ 1,670	$ 4,822	$ 1,069
Secured Debt | Enhanced Equipment Trust Certificate Issued In Current Year
Debt Instrument [Line Items]
Proceeds from issuance of long-term debt	$ 684
Weighted average effective interest rate on variable rate debt	7.10%
American Airlines, Inc.
Debt Instrument [Line Items]
Proceeds from issuance of long-term debt	$ 1,670	$ 4,822	$ 1,069
American Airlines, Inc. | Secured Debt | Enhanced Equipment Trust Certificate Issued In Current Year
Debt Instrument [Line Items]
Proceeds from issuance of long-term debt	$ 684
Weighted average effective interest rate on variable rate debt	7.10%