Annual report [Section 13 and 15(d), not S-K Item 405]

Schedule I - Condensed Financial Information of Registrant - Huntsman Corporation (Parent Only) Balance Sheets (Details) (Parentheticals)

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Schedule I - Condensed Financial Information of Registrant - Huntsman Corporation (Parent Only) Balance Sheets (Details) (Parentheticals) - $ / shares
Dec. 31, 2025
Dec. 31, 2024
Common stock, par value (in dollars per share) $ 0.01 $ 0.01
Common stock, shares authorized (in shares) 1,200,000,000 1,200,000,000
Common stock, shares issued (in shares) 263,229,465 262,751,907
Common stock, shares outstanding (in shares) 172,622,337 172,144,779
Treasury stock, shares (in shares) 90,607,128 90,607,128
Parent Company [Member] | Reportable Legal Entities [Member]    
Common stock, par value (in dollars per share) $ 0.01 $ 0.01
Common stock, shares authorized (in shares) 1,200,000,000 1,200,000,000
Common stock, shares issued (in shares) 263,229,465 262,751,907
Common stock, shares outstanding (in shares) 172,622,337 172,144,779
Treasury stock, shares (in shares) 90,607,128 90,607,128