Share-Based Compensation Plan - Huntsman Plan (Details) - Performance share units - Huntsman Plan	12 Months Ended
Dec. 31, 2017	Dec. 31, 2016
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Weighted-average volatility rate (percent)		39.30%
Risk-free interest rate		0.90%
Minimum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Performance period (years)	2 years
Maximum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Performance period (years)	3 years

The risk-free interest rate assumption that is used in valuing an option on its own shares.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (f)(2)(iv)
-URI http://asc.fasb.org/extlink&oid=116856206&loc=d3e5070-113901

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- Definition

Rate of weighted-average expected volatility for award under share-based payment arrangement.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (f)(2)(ii)
-URI http://asc.fasb.org/extlink&oid=116856206&loc=d3e5070-113901

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- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

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- Definition

The number of years in the performance period for the purpose of setting performance goals for a share-based compensation plan.

+ References

No definition available.

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