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Note 5 - Variable Interest Entities (Details Textual)	6 Months Ended
	Jun. 30, 2026
Rubicon LLC [Member]
Variable Interest Entity, Qualitative or Quantitative Information, Ownership Percentage	50.00%
Arabian Amines Company [Member]
Variable Interest Entity, Qualitative or Quantitative Information, Ownership Percentage	50.00%

X

- Definition

Percentage of the Variable Interest Entity's (VIE) voting interest owned by (or beneficial interest in) the reporting entity (directly or indirectly).

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Name Accounting Standards Codification
-Topic 810
-SubTopic 10
-Section 50
-Paragraph 5A
-Subparagraph (d)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481203/810-10-50-5A

+ Details

Name:	us-gaap_VariableInterestEntityOwnershipPercentage
Namespace Prefix:	us-gaap_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	duration

X

- Details

Name:	srt_ConsolidatedEntitiesAxis=hun_RubiconLlcMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	srt_ConsolidatedEntitiesAxis=hun_ArabianAminesCompanyMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: