v3.26.3
REVENUE RECOGNITION - Revenue by Geographic Region (Details) - USD ($)
$ in Millions
3 Months Ended 9 Months Ended
Sep. 30, 2026
Sep. 30, 2025
Sep. 30, 2026
Sep. 30, 2025
Disaggregation of Revenue [Line Items]        
Operating revenue $ 20,186 $ 16,673 $ 55,797 $ 47,361
Domestic        
Disaggregation of Revenue [Line Items]        
Operating revenue 14,361 11,561 39,819 33,032
Atlantic        
Disaggregation of Revenue [Line Items]        
Operating revenue 3,869 3,423 9,357 8,353
Latin America        
Disaggregation of Revenue [Line Items]        
Operating revenue 997 882 3,703 3,497
Pacific        
Disaggregation of Revenue [Line Items]        
Operating revenue 959 807 2,918 2,479
Passenger        
Disaggregation of Revenue [Line Items]        
Operating revenue 15,534 13,506 43,443 38,852
Passenger | Domestic        
Disaggregation of Revenue [Line Items]        
Operating revenue 10,594 9,103 29,985 26,521
Passenger | Atlantic        
Disaggregation of Revenue [Line Items]        
Operating revenue 3,317 2,977 7,947 7,221
Passenger | Latin America        
Disaggregation of Revenue [Line Items]        
Operating revenue 867 759 3,184 3,047
Passenger | Pacific        
Disaggregation of Revenue [Line Items]        
Operating revenue $ 756 $ 667 $ 2,327 $ 2,063