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Debt - 10.75% Senior Secured Notes (Details) - American Airlines, Inc. - USD ($)
Sep. 25, 2020
Dec. 31, 2020
10.75% Senior Secured Notes | Senior Notes    
Debt Instrument [Line Items]    
Fixed interest rate per annum 10.75%  
Aggregate principal issued   $ 1,200,000,000
Debt instrument, alternative interest rate 0.1200  
Covenant term, minimum unrestricted cash and cash equivalents $ 2,000,000,000.0  
10.75% Senior Secured Notes | Senior Notes | Debt Instrument, Redemption, Period One    
Debt Instrument [Line Items]    
Redemption price percentage 100.00%  
10.75% Senior Secured Notes | Senior Notes | Debt Instrument, Redemption, Period Two    
Debt Instrument [Line Items]    
Redemption price percentage 105.375%  
10.75% Senior Secured Notes | Senior Notes | Debt Instrument, Redemption, Period Three    
Debt Instrument [Line Items]    
Redemption price percentage 101.00%  
Senior Secured IP Notes 10.75% Due 2026 | Payment in Kind (PIK) Note    
Debt Instrument [Line Items]    
Aggregate principal issued $ 1,000,000,000.0  
Debt instrument, conditional additional borrowing capacity 4,000,000,000.0  
Senior Secured LGA/DCA Notes 10.75% | Payment in Kind (PIK) Note    
Debt Instrument [Line Items]    
Aggregate principal issued $ 200,000,000