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Risk Management - Additional Information (Details)
$ in Billions
Dec. 31, 2018
USD ($)
Debt Instrument [Line Items]  
Principal amount of long-term variable rate debt $ 9.9
Variable Rate Debt [Member]  
Debt Instrument [Line Items]  
Weighted average effective interest rate on variable rate debt 4.30%
American Airlines, Inc. [Member]  
Debt Instrument [Line Items]  
Principal amount of long-term variable rate debt $ 9.9
American Airlines, Inc. [Member] | Variable Rate Debt [Member]  
Debt Instrument [Line Items]  
Weighted average effective interest rate on variable rate debt 4.30%