v3.25.4
INVESTMENTS - Equity Investments Ownership Interest and Carrying Value (Details) - USD ($)
$ in Millions
Dec. 31, 2025
Nov. 30, 2025
Dec. 31, 2024
Equity Investments      
Equity investments $ 4,222   $ 2,846
Air France-KLM      
Equity Investments      
Ownership Interest(4) 3.00%   3.00%
Carrying Value $ 100   $ 62
China Eastern      
Equity Investments      
Ownership Interest(4) 2.00%   2.00%
Carrying Value $ 319   $ 155
Hanjin-KAL      
Equity Investments      
Ownership Interest(4) 15.00%   15.00%
Carrying Value $ 861   $ 507
Hanjin-KAL | Common and Preferred Shares      
Equity Investments      
Ownership Interest(4) 14.80%    
Hanjin-KAL | Common Stock      
Equity Investments      
Ownership Interest(4) 14.90%    
LATAM      
Equity Investments      
Ownership Interest(4) 11.00%   10.00%
Carrying Value $ 1,644   $ 837
Republic Airways      
Equity Investments      
Ownership Interest(4) 14.00%   17.00%
Carrying Value $ 124   $ 84
WestJet      
Equity Investments      
Ownership Interest(4) 13.00%   0.00%
Carrying Value $ 248   $ 0
Wheels Up      
Equity Investments      
Ownership Interest(4) 36.00%   38.00%
Carrying Value $ 173   $ 435
Voting rights, shares held threshold 29.90%    
Other investments      
Equity Investments      
Carrying Value $ 325   $ 266
Grupo Aeroméxico      
Equity Investments      
Ownership Interest(4) 19.00% 19.00% 20.00%
Carrying Value $ 377   $ 354
Unifi Aviation      
Equity Investments      
Ownership Interest(4) 20.00% 49.00% 49.00%
Carrying Value $ 51   $ 146