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Note 16 - Stock-based Compensation Plans (Tables) | 9 Months Ended
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Sep. 30, 2023
Notes Tables |
Share-Based Payment Arrangement, Cost by Plan [Table Text Block] |
|  | Three months |  |  | Nine months |
|  | ended |  |  | ended |
|  | September 30, |  |  | September 30, |
|  | 2023 |  |  | 2022 |  |  | 2023 |  |  | 2022 |
Huntsman Corporation compensation cost |  | $ | 7 |  |  | $ | 6 |  |  | $ | 22 |  |  | $ | 26 |
Huntsman International compensation cost |  |  | 7 |  |  |  | 6 |  |  |  | 21 |  |  |  | 24 |
Share-Based Payment Arrangement, Option, Activity [Table Text Block] |
|  |  |  |  |  |  |  |  |  | Weighted |  |  |  |  |
|  |  |  |  |  | Weighted |  |  | average |  |  |  |  |
|  |  |  |  |  | average |  |  | remaining |  |  | Aggregate |
|  |  |  |  |  | exercise |  |  | contractual |  |  | intrinsic |
Option awards |  | Shares |  |  | price |  |  | term |  |  | value |
|  | (in thousands) |  |  |  |  |  |  | (years) |  |  | (in millions) |
Outstanding at January 1, 2023 |  |  | 3,413 |  |  | $ | 21.93 |  |  |  |  |  |  |  |  |
Exercised |  |  | (383 | ) |  |  | 19.76 |  |  |  |  |  |  |  |  |
Forfeited |  |  | (51 | ) |  |  | 30.93 |  |  |  |  |  |  |  |  |
Outstanding at September 30, 2023 |  |  | 2,979 |  |  |  | 22.06 |  |  |  | 3.9 |  |  | $ | 11 |
Exercisable at September 30, 2023 |  |  | 2,906 |  |  |  | 21.89 |  |  |  | 3.8 |  |  |  | 11 |
Schedule of Nonvested Share Activity [Table Text Block] |
|  | Equity awards |  |  | Liability awards |
|  |  |  |  |  |  | Weighted |  |  |  |  |  |  | Weighted |
|  |  |  |  |  |  | average |  |  |  |  |  |  | average |
|  |  |  |  |  |  | grant-date |  |  |  |  |  |  | grant-date |
|  | Shares |  |  |  | fair value |  |  | Shares |  |  | fair value |
|  | (in thousands) |  |  |  |  |  |  |  | (in thousands) |  |  |  |  |
Nonvested at January 1, 2023 |  |  | 1,802 |  |  |  | $ | 35.15 |  |  |  | 257 |  |  | $ | 31.61 |
Granted |  |  | 945 |  |  |  |  | 36.54 |  |  |  | 114 |  |  |  | 30.83 |
Vested |  |  | (723 | ) | (1)(2) |  |  | 27.23 |  |  |  | (165 | ) |  |  | 29.51 |
Forfeited |  |  | (90 | ) |  |  |  | 36.87 |  |  |  | (17 | ) |  |  | 33.76 |
Nonvested at September 30, 2023 |  |  | 1,934 |  |  |  |  | 38.71 |  |  |  | 189 |  |  |  | 32.77 |

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- Definition Tabular disclosure of cost recognized for award under share-based payment arrangement by plan. Includes, but is not limited to, related tax benefit. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (h)(1) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480429/718-10-50-2 + Details
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- Definition Tabular disclosure of the changes in outstanding nonvested shares. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(2) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480429/718-10-50-2 + Details
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- Definition Tabular disclosure for stock option plans. Includes, but is not limited to, outstanding awards at beginning and end of year, grants, exercises, forfeitures, and weighted-average grant date fair value. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(1) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480429/718-10-50-2 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (d) -SubTopic 10 -Topic 718 -Publisher FASB -URI https://asc.fasb.org//1943274/2147480429/718-10-50-2 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (e) -SubTopic 10 -Topic 718 -Publisher FASB -URI https://asc.fasb.org//1943274/2147480429/718-10-50-2 + Details
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