v3.25.2
REVENUE RECOGNITION - Narrative (Details) - USD ($)
$ in Millions
3 Months Ended 6 Months Ended
Jun. 30, 2025
Jun. 30, 2024
Jun. 30, 2025
Jun. 30, 2024
Revenue From Contract With Customer [Line Items]        
Total operating revenue $ 15,236 $ 14,986 $ 28,448 $ 27,525
Advance Ticket Sales        
Revenue From Contract With Customer [Line Items]        
Revenue recognized     5,500 5,000
Ancillary Services        
Revenue From Contract With Customer [Line Items]        
Total operating revenue 1,200 1,200 2,200 2,200
Other Operating Revenue        
Revenue From Contract With Customer [Line Items]        
Total operating revenue 970 892 1,893 1,727
Other Operating Revenue | Chase and Other Partner Agreements        
Revenue From Contract With Customer [Line Items]        
Total operating revenue $ 800 $ 700 $ 1,600 $ 1,500