v3.26.1
Revenue Recognition - Changes in Loyalty Program Liability (Details) - USD ($)
$ in Millions
 6 Months Ended
Jun. 30, 2026
Dec. 31, 2025
Movement In Contract With Customer, Liability [Roll Forward]    
Beginning balance $ 17,722  
Ending balance 21,124  
American Airlines, Inc.    
Movement In Contract With Customer, Liability [Roll Forward]    
Beginning balance 17,722  
Ending balance 21,124  
Loyalty program liability    
Movement In Contract With Customer, Liability [Roll Forward]    
Beginning balance 10,564  
Deferral of revenue 3,177  
Recognition of revenue (2,168)  
Ending balance $ 11,573  
Inactive period before expiration of mileage credits (in months) 24 months  
Deferred revenue, current $ 4,353 $ 3,725
Revenue recognition term (in months) 12 months  
Loyalty program liability | American Airlines, Inc.    
Movement In Contract With Customer, Liability [Roll Forward]    
Beginning balance $ 10,564  
Deferral of revenue 3,177  
Recognition of revenue (2,168)  
Ending balance $ 11,573  
Inactive period before expiration of mileage credits (in months) 24 months  
Deferred revenue, current $ 4,353 $ 3,725
Revenue recognition term (in months) 12 months