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Fair Value Measurements and Financial Instruments - Additional Information (Detail) - Kronos Worldwide, Inc. - 3.75% Senior Secured Notes due September 15, 2025 - Kronos International, Inc | Sep. 30, 2020 EUR (€)
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Financial Instrument At Fair Value [Line Items] |
Estimated market price of the notes | € 990
Principal amount of debt instrument | € 1,000

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- Definition The market price or dollar value of a bond traded in open markets, reflecting any premium or discount to par value. + References No definition available. + Details
Name: | vhi_BondMarketPrice
Namespace Prefix: | vhi_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

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- Definition The nominal value (par value) or dollar value of a bond paid to the holder at maturity. + References No definition available. + Details
Name: | vhi_BondParValue
Namespace Prefix: | vhi_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

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- Definition Financial instrument at fair value. + References No definition available. + Details
Name: | vhi_FinancialInstrumentAtFairValueLineItems
Namespace Prefix: | vhi_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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- Details
Name: | srt_ConsolidatedEntitiesAxis=vhi_KronosMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
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Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
Name: | dei_LegalEntityAxis=vhi_KronosInternationalMember
Namespace Prefix: |
Data Type: | na
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