v3.26.1
REVENUE RECOGNITION - Passenger Revenue (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]        
Passenger revenue $ 19,757 $ 16,648 $ 35,611 $ 30,688
Passenger        
Disaggregation of Revenue [Line Items]        
Passenger revenue 15,607 13,867 27,909 25,347
Ticket        
Disaggregation of Revenue [Line Items]        
Passenger revenue 13,771 12,246 24,538 22,314
Loyalty travel awards        
Disaggregation of Revenue [Line Items]        
Passenger revenue 1,247 1,092 2,277 2,033
Travel-related services        
Disaggregation of Revenue [Line Items]        
Passenger revenue $ 589 $ 529 $ 1,094 $ 1,000