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Organization and Basis of Presentation - Additional Information (Detail) (Contran) | Sep. 30, 2013
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Contran |
Basis Of Presentation And Significant Accounting Policies [Line Items] |
Controlling interest in subsidiary | 94.00%

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- Definition The parent entity's interest in net assets of the subsidiary, expressed as a percentage. + References No definition available. + Details
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Namespace Prefix: | us-gaap_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | instant

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- Details
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Namespace Prefix: | vhi_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration