v3.26.3
Revenue - Narrative (Details) - USD ($)
$ in Millions
3 Months Ended 9 Months Ended 42 Months Ended
Sep. 30, 2026
Jun. 30, 2026
Sep. 30, 2025
Sep. 30, 2026
Sep. 30, 2025
Dec. 31, 2025
Disaggregation of Revenue [Line Items]            
Non-expiring flight credits issued           $ 7,900
Total operating revenues $ 8,422   $ 6,949 $ 24,104 $ 20,621  
Flight credits (as a percent) 5.00%     5.00%   5.00%
Breakage Revenue Reversal            
Disaggregation of Revenue [Line Items]            
Total operating revenues   $ (285)   $ (285)