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Debt - 2013, 2014 and 2016 Credit Facilities (Details) - USD ($)
1 Months Ended 12 Months Ended
Jul. 22, 2021
Mar. 31, 2021
Jan. 31, 2020
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
May 31, 2020
Apr. 30, 2020
Nov. 30, 2019
Oct. 31, 2019
Debt Instrument [Line Items]                    
Principal outstanding or drawn       $ 35,008,000,000 $ 29,324,000,000          
Secured Debt                    
Debt Instrument [Line Items]                    
Minimum aggregate liquidity required under debt covenant       $ 2,000,000,000            
2013 Credit  Facilities | Secured Debt                    
Debt Instrument [Line Items]                    
Line of credit facility undrawn fee percentage       0.63%            
Revolving Credit Facility | 2013 Credit  Facilities                    
Debt Instrument [Line Items]                    
Repayments of debt   $ 750,000,000                
Revolving Credit Facility | 2013 Credit  Facilities | Secured Debt                    
Debt Instrument [Line Items]                    
Line of credit facility, maximum borrowing capacity       $ 750,000,000            
Principal outstanding or drawn       $ 0            
Revolving Credit Facility | 2013 Credit  Facilities | Secured Debt | LIBOR                    
Debt Instrument [Line Items]                    
Basis spread on variable rate       2.00%            
Revolving Credit Facility | 2014 Credit  Facilities                    
Debt Instrument [Line Items]                    
Repayments of debt   1,600,000,000                
Revolving Credit Facility | 2014 Credit  Facilities | Secured Debt                    
Debt Instrument [Line Items]                    
Line of credit facility, maximum borrowing capacity       $ 1,643,000,000            
Principal outstanding or drawn       $ 0            
Revolving Credit Facility | 2014 Credit  Facilities | Secured Debt | LIBOR                    
Debt Instrument [Line Items]                    
Basis spread on variable rate       2.00%            
Revolving Credit Facility | December 2016 Credit Facilities | Secured Debt                    
Debt Instrument [Line Items]                    
Line of credit facility, maximum borrowing capacity       $ 1,250,000,000            
Principal outstanding or drawn       $ 1,188,000,000            
Revolving Credit Facility | December 2016 Credit Facilities | Secured Debt | LIBOR                    
Debt Instrument [Line Items]                    
Basis spread on variable rate       2.00%            
Term Loan Facility | Secured Debt                    
Debt Instrument [Line Items]                    
Annual installment repayment, percent or original principal balance       1.00%            
Term Loan Facility | 2013 Credit  Facilities | Secured Debt                    
Debt Instrument [Line Items]                    
Aggregate principal issued       $ 1,919,000,000            
Principal outstanding or drawn       $ 1,770,000,000            
Term Loan Facility | 2013 Credit  Facilities | Secured Debt | LIBOR                    
Debt Instrument [Line Items]                    
Basis spread on variable rate       1.75%            
Term Loan Facility | 2014 Credit  Facilities | Secured Debt                    
Debt Instrument [Line Items]                    
Aggregate principal issued       $ 1,280,000,000            
Principal outstanding or drawn       $ 1,208,000,000            
Term Loan Facility | 2014 Credit  Facilities | Secured Debt | LIBOR                    
Debt Instrument [Line Items]                    
Basis spread on variable rate       1.75%            
Term Loan Facility | April 2016 Credit Facilities | Secured Debt                    
Debt Instrument [Line Items]                    
Aggregate principal issued       $ 450,000,000            
Principal outstanding or drawn       $ 0            
Term Loan Facility | April 2016 Credit Facilities | Secured Debt | LIBOR                    
Debt Instrument [Line Items]                    
Basis spread on variable rate       2.00%            
Letter of Credit | 2013 Credit  Facilities | Secured Debt                    
Debt Instrument [Line Items]                    
Line of credit facility, maximum borrowing capacity       $ 100,000,000            
Letter of Credit | 2014 Credit  Facilities | Secured Debt                    
Debt Instrument [Line Items]                    
Line of credit facility, maximum borrowing capacity       200,000,000            
American Airlines, Inc.                    
Debt Instrument [Line Items]                    
Principal outstanding or drawn       29,789,000,000 $ 25,710,000,000          
American Airlines, Inc. | Secured Debt                    
Debt Instrument [Line Items]                    
Minimum aggregate liquidity required under debt covenant       $ 2,000,000,000            
American Airlines, Inc. | Spare Parts Credit Facility April 2016 | Secured Debt                    
Debt Instrument [Line Items]                    
Repayments of debt $ 950,000,000                  
American Airlines, Inc. | Revolving Credit Facility | Secured Debt                    
Debt Instrument [Line Items]                    
Line of credit facility undrawn fee percentage       0.63%            
American Airlines, Inc. | Revolving Credit Facility | 2013 Credit  Facilities                    
Debt Instrument [Line Items]                    
Repayments of debt   750,000,000                
American Airlines, Inc. | Revolving Credit Facility | 2013 Credit  Facilities | Secured Debt                    
Debt Instrument [Line Items]                    
Line of credit facility, maximum borrowing capacity                 $ 750,000,000 $ 1,000,000,000
American Airlines, Inc. | Revolving Credit Facility | 2013 Credit  Facilities | Secured Debt | LIBOR                    
Debt Instrument [Line Items]                    
Line of credit facility, maximum borrowing capacity       $ 750,000,000            
Basis spread on variable rate       2.00%            
Principal outstanding or drawn       $ 0            
American Airlines, Inc. | Revolving Credit Facility | 2014 Credit  Facilities                    
Debt Instrument [Line Items]                    
Repayments of debt   1,600,000,000                
Long-term line of credit             $ 0      
American Airlines, Inc. | Revolving Credit Facility | 2014 Credit  Facilities | Secured Debt                    
Debt Instrument [Line Items]                    
Line of credit facility, maximum borrowing capacity     $ 1,200,000,000           1,600,000,000 1,500,000,000
Long-term line of credit       0            
American Airlines, Inc. | Revolving Credit Facility | 2014 Credit  Facilities | Secured Debt | LIBOR                    
Debt Instrument [Line Items]                    
Line of credit facility, maximum borrowing capacity       $ 1,643,000,000            
Basis spread on variable rate     1.75% 2.00% 2.00% 2.00%        
Floor interest rate     0.00% 0.00%            
Principal outstanding or drawn       $ 0            
American Airlines, Inc. | Revolving Credit Facility | 2014 Credit  Facilities | Secured Debt | Base Rate                    
Debt Instrument [Line Items]                    
Basis spread on variable rate     0.75%   1.00% 1.00%        
American Airlines, Inc. | Revolving Credit Facility | April 2016 Credit Facilities                    
Debt Instrument [Line Items]                    
Repayments of debt   $ 450,000,000                
American Airlines, Inc. | Revolving Credit Facility | April 2016 Credit Facilities | Secured Debt                    
Debt Instrument [Line Items]                    
Line of credit facility, maximum borrowing capacity                 $ 450,000,000 $ 300,000,000
Long-term line of credit               $ 0    
American Airlines, Inc. | Revolving Credit Facility | April 2016 Credit Facilities | Secured Debt | LIBOR                    
Debt Instrument [Line Items]                    
Line of credit facility, maximum borrowing capacity       $ 1,250,000,000            
Basis spread on variable rate       2.00%            
Principal outstanding or drawn       $ 1,188,000,000            
American Airlines, Inc. | Term Loan Facility | Secured Debt                    
Debt Instrument [Line Items]                    
Annual installment repayment, percent or original principal balance       1.00%            
American Airlines, Inc. | Term Loan Facility | 2013 Credit  Facilities | Secured Debt | LIBOR                    
Debt Instrument [Line Items]                    
Basis spread on variable rate       1.75%            
Aggregate principal issued       $ 1,919,000,000            
Principal outstanding or drawn       $ 1,770,000,000            
American Airlines, Inc. | Term Loan Facility | 2014 Credit  Facilities | Secured Debt | LIBOR                    
Debt Instrument [Line Items]                    
Basis spread on variable rate       1.75%            
Aggregate principal issued       $ 1,280,000,000            
Principal outstanding or drawn       $ 1,208,000,000            
American Airlines, Inc. | Term Loan Facility | April 2016 Credit Facilities | Secured Debt | LIBOR                    
Debt Instrument [Line Items]                    
Basis spread on variable rate       2.00%            
Aggregate principal issued       $ 450,000,000            
Principal outstanding or drawn       0            
American Airlines, Inc. | Letter of Credit | 2013 Credit  Facilities | Secured Debt                    
Debt Instrument [Line Items]                    
Line of credit facility, maximum borrowing capacity       100,000,000            
American Airlines, Inc. | Letter of Credit | 2014 Credit  Facilities | Secured Debt                    
Debt Instrument [Line Items]                    
Line of credit facility, maximum borrowing capacity       $ 200,000,000