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Other income, net - Additional Information (Detail) - USD ($) $ in Millions	3 Months Ended				6 Months Ended	12 Months Ended
	Sep. 30, 2023	Jun. 30, 2022	Sep. 30, 2021	Jun. 30, 2021	Jun. 30, 2023	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Disclosure Other Income Net Additional Information Detail [Line Items]
Insurance recoveries						$ 3.0	$ 2.8	$ 0.1
Pre-tax gain on sale of land			$ 10.4	$ 5.6	$ 1.5	1.5		16.0
Net proceeds			$ 15.0	$ 8.4	$ 1.8	1.8		23.4
Infrastructure reimbursement						25.5	16.0	$ 15.3
Kronos Worldwide, Inc.
Disclosure Other Income Net Additional Information Detail [Line Items]
Insurance recoveries						2.5	$ 2.7
Land Well [Member]
Disclosure Other Income Net Additional Information Detail [Line Items]
Infrastructure reimbursement	$ 0.3	$ 0.8
N L Industries Inc
Disclosure Other Income Net Additional Information Detail [Line Items]
Insurance recoveries						$ 0.5

X

- Definition

The difference between the carrying value and the sale price of real estate or properties that were intended to be sold or held for capital appreciation or rental income. This element refers to the gain (loss) included in earnings and not to the cash proceeds of the sale. This element is a noncash adjustment to net income when calculating net cash generated by operating activities using the indirect method.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 230
-SubTopic 10
-Name Accounting Standards Codification
-Section 45
-Paragraph 28
-Subparagraph (b)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147482740/230-10-45-28

Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 360
-SubTopic 10
-Name Accounting Standards Codification
-Section 45
-Paragraph 5
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147482130/360-10-45-5

Reference 3: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 360
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 3
-Subparagraph (c)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147482099/360-10-50-3

+ Details

Name:	us-gaap_GainLossOnSaleOfProperties
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

X

- Definition

The amount recovered from insurance. These recoveries reduce costs and losses that are reported as a separate line item under operating expenses.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Topic 220
-SubTopic 10
-Name Accounting Standards Codification
-Section S99
-Paragraph 2
-Subparagraph (SX 210.5-03.3)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147483621/220-10-S99-2

+ Details

Name:	us-gaap_InsuranceRecoveries
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

X

- Definition

The cash inflow from the sale of land held for investment; excludes sales of land held as inventory or productive use.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Topic 230
-SubTopic 10
-Name Accounting Standards Codification
-Section 45
-Paragraph 12
-Subparagraph (c)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147482740/230-10-45-12

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

X

- Definition

Disclosure Other Income Net Additional Information Detail [Line Items]

+ References

No definition available.

+ Details

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Namespace Prefix:	vhi_
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X

- Definition

Infrastructure development cost reimbursed.

+ References

No definition available.

+ Details

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Namespace Prefix:	vhi_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

X

- Details

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Namespace Prefix:
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Balance Type:
Period Type:

X

- Details

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

X

- Details

Name:	dei_LegalEntityAxis=vhi_NLIndustriesIncMember
Namespace Prefix:
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