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Employee Benefit Plans - Additional Information (Detail) (USD $) In Millions, unless otherwise specified | Mar. 31, 2015
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Defined Benefit Pension Plans |
Defined Benefit Plan Disclosure [Line Items] |
Expected contribution | $ 19.6 vhi_DefinedBenefitPlanEstimatedEmployerContributionsInCurrentFiscalYear / us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis = us-gaap_PensionPlansDefinedBenefitMember
OPEB |
Defined Benefit Plan Disclosure [Line Items] |
Expected contribution | $ 1.3 vhi_DefinedBenefitPlanEstimatedEmployerContributionsInCurrentFiscalYear / us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis = us-gaap_OtherPostretirementBenefitPlansDefinedBenefitMember

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- Details
Name: | us-gaap_DefinedBenefitPlanDisclosureLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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- Definition Defined benefit plan estimated employer contributions in current fiscal year. + References No definition available. + Details
Name: | vhi_DefinedBenefitPlanEstimatedEmployerContributionsInCurrentFiscalYear
Namespace Prefix: | vhi_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

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- Details
Name: | us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis=us-gaap_OtherPostretirementBenefitPlansDefinedBenefitMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis=us-gaap_PensionPlansDefinedBenefitMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |