v3.26.1
REVENUE RECOGNITION - Revenue by Geographic Region (Details) - USD ($)
$ in Millions
3 Months Ended 6 Months Ended
Jun. 30, 2026
Jun. 30, 2025
Jun. 30, 2026
Jun. 30, 2025
Disaggregation of Revenue [Line Items]        
Operating revenue $ 19,757 $ 16,648 $ 35,611 $ 30,688
Domestic        
Disaggregation of Revenue [Line Items]        
Operating revenue 13,957 11,417 25,459 21,472
Atlantic        
Disaggregation of Revenue [Line Items]        
Operating revenue 3,620 3,283 5,487 4,929
Latin America        
Disaggregation of Revenue [Line Items]        
Operating revenue 1,146 1,093 2,706 2,615
Pacific        
Disaggregation of Revenue [Line Items]        
Operating revenue 1,034 855 1,959 1,672
Passenger        
Disaggregation of Revenue [Line Items]        
Operating revenue 15,607 13,867 27,909 25,347
Passenger | Domestic        
Disaggregation of Revenue [Line Items]        
Operating revenue 10,673 9,318 19,392 17,418
Passenger | Atlantic        
Disaggregation of Revenue [Line Items]        
Operating revenue 3,112 2,872 4,629 4,245
Passenger | Latin America        
Disaggregation of Revenue [Line Items]        
Operating revenue 990 954 2,317 2,288
Passenger | Pacific        
Disaggregation of Revenue [Line Items]        
Operating revenue $ 832 $ 723 $ 1,571 $ 1,396