Risk Management (Details) $ in Billions	Dec. 31, 2020 USD ($)
Debt Instrument [Line Items]
Principal amount of long-term variable rate debt	$ 12.8
Variable Rate Debt
Debt Instrument [Line Items]
Weighted average effective interest rate on variable rate debt	2.00%
American Airlines, Inc.
Debt Instrument [Line Items]
Principal amount of long-term variable rate debt	$ 12.8
American Airlines, Inc. | Variable Rate Debt
Debt Instrument [Line Items]
Weighted average effective interest rate on variable rate debt	2.00%