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Share Based Compensation - Additional Information (Details) - USD ($)
shares in Millions, $ in Millions
12 Months Ended
Dec. 31, 2024
Dec. 31, 2023
Dec. 31, 2022
May 31, 2023
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Share-based compensation costs $ 130 $ 102 $ 78  
Common stock withheld or sold related to tax obligations (in shares) 1.6 1.5 1.2  
Payment of certain tax withholding obligations associated with employee equity awards $ 27 $ 23 $ 21  
Restricted stock unit awards        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Vesting period 3 years      
Restricted Stock Units (RSUs), Stock Settled        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Unrecognized compensation cost $ 46      
Recognition period 1 year      
Total fair value of stock-settled during the year $ 69 78 70  
CRSU        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Unrecognized compensation cost $ 83      
Recognition period 1 year      
Liability related to cash settled awards $ 39      
Cash paid for awards vested 18      
2023 Incentive Award Plan        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Shares authorized for grant (in shares)       17.2
American Airlines, Inc.        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Share-based compensation costs $ 124 $ 97 $ 75  
Common stock withheld or sold related to tax obligations (in shares) 1.6 1.5 1.2  
Payment of certain tax withholding obligations associated with employee equity awards $ 27 $ 23 $ 21  
American Airlines, Inc. | Restricted stock unit awards        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Vesting period 3 years      
American Airlines, Inc. | Restricted Stock Units (RSUs), Stock Settled        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Unrecognized compensation cost $ 44      
Recognition period 1 year      
Total fair value of stock-settled during the year $ 69 $ 78 $ 70  
American Airlines, Inc. | CRSU        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Unrecognized compensation cost $ 77      
Recognition period 1 year      
Liability related to cash settled awards $ 39      
Cash paid for awards vested $ 18      
American Airlines, Inc. | 2023 Incentive Award Plan        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Shares authorized for grant (in shares)       17.2