v3.26.3
REVENUE RECOGNITION - Narrative (Details) - USD ($)
$ in Millions
3 Months Ended 9 Months Ended
Sep. 30, 2026
Sep. 30, 2025
Sep. 30, 2026
Sep. 30, 2025
Revenue From Contract With Customer [Line Items]        
Total operating revenue $ 17,875 $ 15,225 $ 50,156 $ 43,673
Advance Ticket Sales        
Revenue From Contract With Customer [Line Items]        
Revenue recognized     6,300 5,800
Ancillary Services        
Revenue From Contract With Customer [Line Items]        
Total operating revenue 1,400 1,300 4,000 3,500
Other operating revenue        
Revenue From Contract With Customer [Line Items]        
Total operating revenue 1,106 979 3,170 2,872
Other operating revenue | Chase and Other Partner Agreements        
Revenue From Contract With Customer [Line Items]        
Total operating revenue $ 900 $ 800 $ 2,700 $ 2,400