Percentage points added to the reference rate to compute the variable rate on the debt instrument.

No definition available.

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Period Type:	duration

- Definition

Date when the debt instrument is scheduled to be fully repaid, in CCYY-MM-DD format.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.22(a)(2))
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Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 820
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (bbb)(2)
-URI http://asc.fasb.org/extlink&oid=117815213&loc=d3e19207-110258

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- Definition

The carrying value as of the balance sheet date of the current and noncurrent portions of long-term obligations drawn from a line of credit, which is a bank's commitment to make loans up to a specific amount. Examples of items that might be included in the application of this element may consist of letters of credit, standby letters of credit, and revolving credit arrangements, under which borrowings can be made up to a maximum amount as of any point in time conditional on satisfaction of specified terms before, as of and after the date of drawdowns on the line. Includes short-term obligations that would normally be classified as current liabilities but for which (a) postbalance sheet date issuance of a long term obligation to refinance the short term obligation on a long term basis, or (b) the enterprise has entered into a financing agreement that clearly permits the enterprise to refinance the short-term obligation on a long term basis and the following conditions are met (1) the agreement does not expire within 1 year and is not cancelable by the lender except for violation of an objectively determinable provision, (2) no violation exists at the BS date, and (3) the lender has entered into the financing agreement is expected to be financially capable of honoring the agreement.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
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Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
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-Section S99
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-URI http://asc.fasb.org/extlink&oid=119400593&loc=d3e572229-122910

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- 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.

+ Details

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Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

Maximum borrowing capacity under the credit facility without consideration of any current restrictions on the amount that could be borrowed or the amounts currently outstanding under the facility.

+ References

+ Details

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Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Amount of borrowing capacity currently available under the credit facility (current borrowing capacity less the amount of borrowings outstanding).

+ References

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

The cash inflow from a contractual arrangement with the lender, including letter of credit, standby letter of credit and revolving credit arrangements, under which borrowings can be made up to a specific amount at any point in time with maturities due beyond one year or the operating cycle, if longer.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 14
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=118932676&loc=d3e3255-108585

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Balance Type:	debit
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- Definition

The net cash inflow or cash outflow from a contractual arrangement with the lender, including letter of credit, standby letter of credit and revolving credit arrangements, under which borrowings can be made up to a specific amount at any point in time with either short term or long term maturity that is collateralized (backed by pledge, mortgage or other lien in the entity's assets).

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 235
-SubTopic 10
-Section S99
-Paragraph 3
-Subparagraph (SX 210.12-04(a))
-URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e24072-122690

+ Details

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

- Definition

Amount of cash outflow for payment of an obligation from a lender, including but not limited to, letter of credit, standby letter of credit and revolving credit arrangements.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 15
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-Name Accounting Standards Codification
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-Section S99
-Paragraph 1
-Subparagraph (SX 210.4-08.(f))
-URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e23780-122690

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Balance Type:	credit
Period Type:	duration

- Definition

Fixed charge coverage ratio minimum value.

+ References

No definition available.

+ Details

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Namespace Prefix:	vhi_
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Period Type:	duration

- Definition

Line of credit facility expiration month and year.

+ References

No definition available.

+ Details

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- Details

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Long-Term Debt - Revolving Credit Facility - Additional Information (Detail) - Kronos Worldwide, Inc.	12 Months Ended
	Dec. 31, 2019 USD ($)	Dec. 31, 2019 EUR (€)	Dec. 31, 2018 USD ($)	Dec. 31, 2018 EUR (€)	Dec. 31, 2019 EUR (€)	Dec. 31, 2017 USD ($)
Foreign Line of Credit \| Europe
Line Of Credit Facility [Line Items]
Amount available for borrowing	$ 100,800,000				€ 90,000,000
Revolving credit facility, borrowings (repayments) \| €		€ 0		€ 0
Outstanding borrowings under revolving credit facility	0
Revolving North American Credit Facility
Line Of Credit Facility [Line Items]
Line of credit maximum borrowing capacity	$ 125,000,000
Fixed charge coverage ratio, minimum value	100.00%	100.00%
Revolving credit facility, borrowings	$ 0		$ 0
Repayment of credit facility	0		$ 0
Amount available for borrowing	$ 104,800,000
Revolving North American Credit Facility \| Maturity Date Option 1
Line Of Credit Facility [Line Items]
Line of credit, maturity month and year	2022-01	2022-01
Revolving North American Credit Facility \| Minimum \| Variable Rate
Line Of Credit Facility [Line Items]
Interest rate on outstanding borrowings	1.50%	1.50%
Revolving North American Credit Facility \| Minimum \| Base Rate Option
Line Of Credit Facility [Line Items]
Interest rate on outstanding borrowings	0.50%	0.50%
Revolving North American Credit Facility \| Maximum \| Variable Rate
Line Of Credit Facility [Line Items]
Interest rate on outstanding borrowings	2.00%	2.00%
Revolving North American Credit Facility \| Maximum \| Base Rate Option
Line Of Credit Facility [Line Items]
Interest rate on outstanding borrowings	1.00%	1.00%
Letter Of Credit \| Revolving North American Credit Facility
Line Of Credit Facility [Line Items]
Line of credit maximum borrowing capacity						$ 15,000,000
Canadian Subsidiary Revolving Borrowings Maximum \| Revolving North American Credit Facility
Line Of Credit Facility [Line Items]
Line of credit maximum borrowing capacity						$ 25,000,000
European Revolving Credit Facility
Line Of Credit Facility [Line Items]
Line of credit maximum borrowing capacity \| €					€ 90,000,000
Line of credit maturity	Sep. 30, 2022	Sep. 30, 2022
European Revolving Credit Facility \| EURIBOR
Line Of Credit Facility [Line Items]
Interest rate on outstanding borrowings	1.60%	1.60%