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Subsequent Events (Details) - Secured Debt - American Airlines, Inc. - USD ($)
$ in Millions
Jul. 22, 2021
Jun. 30, 2021
April 2016 Spare Parts Term Loan Facility | Subsequent Event    
Subsequent Event [Line Items]    
Repayments of outstanding term loans $ 950  
April 2016 Revolving Facility    
Subsequent Event [Line Items]    
Line of credit facility, maximum borrowing capacity   $ 450