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Note 1 - General (Details Textual)
€ in Millions, $ in Millions
3 Months Ended 6 Months Ended
Jun. 15, 2026
Jun. 05, 2026
USD ($)
Jun. 05, 2026
EUR (€)
Jun. 30, 2026
USD ($)
Jun. 30, 2025
USD ($)
Jun. 30, 2026
USD ($)
Jun. 30, 2025
USD ($)
Number of Operating Segments           3  
Gain (Loss) on Disposition of Business       $ 22 [1] $ (0) $ 22 [1] $ (0)
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, 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.”