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

Schedule I - Condensed Financial Information of Registrant - Huntsman Corporation (Parent Only) Statements of Stockholders' Equity (Details)

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Schedule I - Condensed Financial Information of Registrant - Huntsman Corporation (Parent Only) Statements of Stockholders' Equity (Details) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2025
Dec. 31, 2024
Dec. 31, 2023
Balance $ 2,959    
Net (loss) income (284) $ (189) $ 101
Issuance of nonvested stock awards 0 0 0
Vesting of stock awards 2 2 5
Recognition of stock-based compensation 29 29 27
Repurchase and cancellation of stock awards $ (3) (5) (10)
Stock options exercised (in shares) 56,000    
Stock options exercised $ 1 0 5
Treasury stock repurchased     (353)
Dividends declared on common stock (148) (174) (170)
Acquisition of noncontrolling interests, net of tax     $ (3)
Balance $ 2,750 $ 2,959  
Balance (in shares) 172,622,337    
Common Stock Outstanding [Member]      
Shares Issued, Shares, Share-Based Payment Arrangement, after Forfeiture (in shares) 630,694 728,499 1,028,971
Repurchase and cancellation of stock awards (in shares) (181,563) (234,161) (307,093)
Stock options exercised (in shares) 28,427 67,110 320,364
Treasury stock repurchased (in shares)     (13,093,375)
Common Stock [Member]      
Issuance of nonvested stock awards $ 0 $ 0 $ 0
Vesting of stock awards 0 0 0
Recognition of stock-based compensation 0 0 0
Repurchase and cancellation of stock awards 0 0 0
Stock options exercised 0 0 0
Treasury stock repurchased     0
Dividends declared on common stock 0 0 0
Acquisition of noncontrolling interests, net of tax     0
Additional Paid-in Capital [Member]      
Issuance of nonvested stock awards 25 20 32
Vesting of stock awards 2 2 5
Recognition of stock-based compensation 0 0 1
Repurchase and cancellation of stock awards 0 0 0
Stock options exercised 1 9 9
Treasury stock repurchased     0
Dividends declared on common stock 0 0 0
Acquisition of noncontrolling interests, net of tax     (1)
Treasury Stock, Common [Member]      
Issuance of nonvested stock awards 0 0 0
Vesting of stock awards 0 0 0
Recognition of stock-based compensation 0 0 0
Repurchase and cancellation of stock awards 0 0 0
Stock options exercised 0 0 0
Treasury stock repurchased     (353)
Dividends declared on common stock 0 0 0
Acquisition of noncontrolling interests, net of tax     0
Deferred Compensation, Share-Based Payments [Member]      
Issuance of nonvested stock awards (25) (20) (32)
Vesting of stock awards 0 0 0
Recognition of stock-based compensation 29 29 26
Repurchase and cancellation of stock awards 0 0 0
Stock options exercised 0 0 0
Treasury stock repurchased     0
Dividends declared on common stock 0 0 0
Acquisition of noncontrolling interests, net of tax     0
Retained Earnings [Member]      
Issuance of nonvested stock awards 0 0 0
Vesting of stock awards 0 0 0
Recognition of stock-based compensation 0 0 0
Repurchase and cancellation of stock awards (3) (5) (10)
Stock options exercised 0    
Stock options exercised   (9) (4)
Treasury stock repurchased     0
Dividends declared on common stock (148) (174) (170)
Acquisition of noncontrolling interests, net of tax     0
AOCI Attributable to Parent [Member]      
Issuance of nonvested stock awards 0 0 0
Vesting of stock awards 0 0 0
Recognition of stock-based compensation 0 0 0
Repurchase and cancellation of stock awards 0 0 0
Stock options exercised 0 0 0
Treasury stock repurchased     0
Dividends declared on common stock 0 0 0
Acquisition of noncontrolling interests, net of tax     0
Parent Company [Member] | Reportable Legal Entities [Member]      
Balance 2,959 3,251 3,624
Net (loss) income (284) (189) 101
Other comprehensive income 194 45 23
Issuance of nonvested stock awards 0 0 0
Vesting of stock awards 2 2 5
Recognition of stock-based compensation 29 29 27
Repurchase and cancellation of stock awards (3) (5) (10)
Stock options exercised 1 0 5
Treasury stock repurchased     353
Dividends declared on common stock (148) (174) (170)
Acquisition of noncontrolling interests, net of tax     (1)
Balance $ 2,750 $ 2,959 $ 3,251
Parent Company [Member] | Reportable Legal Entities [Member] | Common Stock Outstanding [Member]      
Balance (in shares) 172,144,779 171,583,331 183,634,464
Shares Issued, Shares, Share-Based Payment Arrangement, after Forfeiture (in shares) 630,694 728,499 1,028,971
Repurchase and cancellation of stock awards (in shares) (181,563) (234,161) (307,093)
Stock options exercised (in shares) 28,427 67,110 320,364
Treasury stock repurchased (in shares)     (13,093,375)
Balance (in shares)   172,144,779 171,583,331
Parent Company [Member] | Reportable Legal Entities [Member] | Common Stock [Member]      
Balance $ 3 $ 3 $ 3
Net (loss) income 0 0 0
Other comprehensive income 0 0 0
Issuance of nonvested stock awards 0 0 0
Vesting of stock awards 0 0 0
Recognition of stock-based compensation 0 0 0
Repurchase and cancellation of stock awards 0 0 0
Stock options exercised 0 0 0
Treasury stock repurchased     0
Dividends declared on common stock 0 0 0
Acquisition of noncontrolling interests, net of tax     0
Balance 3 3 3
Parent Company [Member] | Reportable Legal Entities [Member] | Additional Paid-in Capital [Member]      
Balance 4,233 4,202 4,156
Net (loss) income 0 0 0
Other comprehensive income 0 0 0
Issuance of nonvested stock awards 25 20 32
Vesting of stock awards 2 2 5
Recognition of stock-based compensation 0 0 1
Repurchase and cancellation of stock awards 0 0 0
Stock options exercised 1 9 9
Treasury stock repurchased     0
Dividends declared on common stock 0 0 0
Acquisition of noncontrolling interests, net of tax     (1)
Balance 4,261 4,233 4,202
Parent Company [Member] | Reportable Legal Entities [Member] | Treasury Stock, Common [Member]      
Balance (2,290) (2,290) (1,937)
Net (loss) income 0 0 0
Other comprehensive income 0 0 0
Issuance of nonvested stock awards 0 0 0
Vesting of stock awards 0 0 0
Recognition of stock-based compensation 0 0 0
Repurchase and cancellation of stock awards 0 0 0
Stock options exercised 0 0 0
Treasury stock repurchased     353
Dividends declared on common stock 0 0 0
Acquisition of noncontrolling interests, net of tax     0
Balance (2,290) (2,290) (2,290)
Parent Company [Member] | Reportable Legal Entities [Member] | Deferred Compensation, Share-Based Payments [Member]      
Balance (32) (41) (35)
Net (loss) income 0 0 0
Other comprehensive income 0 0 0
Issuance of nonvested stock awards (25) (20) (32)
Vesting of stock awards 0 0 0
Recognition of stock-based compensation 29 29 26
Repurchase and cancellation of stock awards 0 0 0
Stock options exercised 0 0 0
Treasury stock repurchased     0
Dividends declared on common stock 0 0 0
Acquisition of noncontrolling interests, net of tax     0
Balance (28) (32) (41)
Parent Company [Member] | Reportable Legal Entities [Member] | Retained Earnings [Member]      
Balance 2,245 2,622 2,705
Net (loss) income (284) (189) 101
Other comprehensive income 0 0 0
Issuance of nonvested stock awards 0 0 0
Vesting of stock awards 0 0 0
Recognition of stock-based compensation 0 0 0
Repurchase and cancellation of stock awards (3) (5) (10)
Stock options exercised 0    
Stock options exercised   (9) (4)
Treasury stock repurchased     0
Dividends declared on common stock (148) (174) (170)
Acquisition of noncontrolling interests, net of tax     0
Balance 1,810 2,245 2,622
Parent Company [Member] | Reportable Legal Entities [Member] | AOCI Attributable to Parent [Member]      
Balance (1,200) (1,245) (1,268)
Net (loss) income 0 0 0
Other comprehensive income 194 45 23
Issuance of nonvested stock awards 0 0 0
Vesting of stock awards 0 0 0
Recognition of stock-based compensation 0 0 0
Repurchase and cancellation of stock awards 0 0 0
Stock options exercised 0 0 0
Treasury stock repurchased     0
Dividends declared on common stock 0 0 0
Acquisition of noncontrolling interests, net of tax     0
Balance $ (1,006) $ (1,200) $ (1,245)