Quarterly report [Sections 13 or 15(d)]

Note 1 - General (Details Textual)

v3.26.3
Note 1 - General (Details Textual)
€ in Millions, $ in Millions
3 Months Ended 9 Months Ended
Jun. 15, 2026
Jun. 05, 2026
USD ($)
Jun. 05, 2026
EUR (€)
Sep. 30, 2026
USD ($)
Jun. 30, 2026
USD ($)
Sep. 30, 2025
USD ($)
Sep. 30, 2026
USD ($)
Sep. 30, 2025
USD ($)
Aug. 25, 2026
Number of Operating Segments             3    
Gain (Loss) on Disposition of Business       $ (0)   $ (0) $ 22 [1] $ (0)  
Disposal Group, Not Discontinued Operation, Name [Extensible Enumeration]   Gomet [Member] Gomet [Member]            
Disposal Group, Disposed of by Sale, Not Discontinued Operations [Member]                  
Proceeds from Sales of Business, Affiliate and Productive Assets   $ 50 € 43            
Gain (Loss) on Disposition of Business         $ 22        
Goodwill, Divestiture   $ 4              
Merger with Olin Corporation [Member]                  
Business Combination, Percentage Votes Cast in Favor                 99.00%
Business Combination, Percentage of Participating Voting Shares                 75.00%
Business Combination, Share Transfer Ratio 0.5476                
Merger with Olin Corporation [Member] | Huntsman [Member]                  
Ownership Percentage 45.50%                
Merger with Olin Corporation [Member] | Olin Corporation [Member]                  
Ownership Percentage 54.50%                
[1] Gain on sale of business/assets, net includes $22 million related to the gain on sale of our Gomet business. See “Note 1. General—Recent Developments—Sale of Huntsman Gomet Business.”