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 Cash Flows (Details)

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Schedule I - Condensed Financial Information of Registrant - Huntsman Corporation (Parent Only) Statements of Cash Flows (Details) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2025
Dec. 31, 2024
Dec. 31, 2023
Operating activities:      
Net (loss) income $ (284) $ (189) $ 101
Equity in loss of subsidiaries (4) (44) (83)
Stock-based compensation 31 30 28
Net cash provided by operating activities 289 263 209
Investing activities:      
Net cash provided by investing activities (132) (126) 305
Financing activities:      
Dividends paid to common stockholders (146) (174) (169)
Repurchase of common stock 0 (4) (349)
Proceeds from issuance of common stock 0 0 5
Other, net (1) (6) 1
Net cash used in financing activities (76) (326) (620)
Increase (decrease) in cash and cash equivalents 89 (200) (114)
Cash and cash equivalents at beginning of period 340 540 654
Cash and cash equivalents at end of period 429 340 540
Reportable Legal Entities [Member] | Parent Company [Member]      
Operating activities:      
Net (loss) income (284) (189) 101
Equity in loss of subsidiaries 426 358 68
Stock-based compensation 2 1 1
Changes in operating assets and liabilities (2) 2 0
Net cash provided by operating activities 142 172 170
Investing activities:      
Net cash provided by investing activities 0 0 0
Financing activities:      
Dividends paid to common stockholders (146) (174) (169)
Repurchase and cancellation of stock awards (3) (5) (10)
Repurchase of common stock 0 (4) (349)
Proceeds from issuance of common stock 0 0 5
Increase in payable to affiliates 6 13 352
Other, net 1 (2) 1
Net cash used in financing activities (142) (172) (170)
Increase (decrease) in cash and cash equivalents 0 0 0
Cash and cash equivalents at beginning of period 0 0 0
Cash and cash equivalents at end of period $ 0 $ 0 $ 0