v3.26.3
Revenue Recognition - Changes in Loyalty Program Liability (Details) - USD ($)
$ in Millions
 9 Months Ended
Sep. 30, 2026
Dec. 31, 2025
Movement In Contract With Customer, Liability [Roll Forward]    
Beginning balance $ 17,722  
Ending balance 20,928  
American Airlines, Inc.    
Movement In Contract With Customer, Liability [Roll Forward]    
Beginning balance 17,722  
Ending balance 20,928  
Loyalty program liability    
Movement In Contract With Customer, Liability [Roll Forward]    
Beginning balance 10,564  
Deferral of revenue 4,304  
Recognition of revenue (3,354)  
Ending balance $ 11,514  
Inactive period before expiration of mileage credits (in months) 24 months  
Deferred revenue, current $ 4,446 $ 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 4,304  
Recognition of revenue (3,354)  
Ending balance $ 11,514  
Inactive period before expiration of mileage credits (in months) 24 months  
Deferred revenue, current $ 4,446 $ 3,725
Revenue recognition term (in months) 12 months