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Related Party Transactions - Additional Information (Detail) (USD $) In Millions, unless otherwise specified | 12 Months Ended |
--- | --- | ---
Dec. 31, 2012 | Dec. 31, 2014 | Dec. 31, 2013 | Dec. 31, 2011
CompX | Note Payable TFMC |  |  |  |
Related Party Transaction [Line Items] |  |  |  |
Interest expense, related party | $ 0.3 us-gaap_InterestExpenseRelatedParty / us-gaap_FinancialInstrumentAxis = vhi_NotePayableTFMCMember / dei_LegalEntityAxis = vhi_CompXMember |  |  |
LPC |  |  |  |
Related Party Transaction [Line Items] |  |  |  |
Purchase of Ti02 from LPC | 250.2 us-gaap_RelatedPartyTransactionPurchasesFromRelatedParty / dei_LegalEntityAxis = vhi_LouisianaPigmentCompanyMember | 193.1 us-gaap_RelatedPartyTransactionPurchasesFromRelatedParty / dei_LegalEntityAxis = vhi_LouisianaPigmentCompanyMember | 224.5 us-gaap_RelatedPartyTransactionPurchasesFromRelatedParty / dei_LegalEntityAxis = vhi_LouisianaPigmentCompanyMember |
Sales of feedstock ore to LPC | 143.7 us-gaap_RevenueFromRelatedParties / dei_LegalEntityAxis = vhi_LouisianaPigmentCompanyMember | 98.4 us-gaap_RevenueFromRelatedParties / dei_LegalEntityAxis = vhi_LouisianaPigmentCompanyMember | 141.1 us-gaap_RevenueFromRelatedParties / dei_LegalEntityAxis = vhi_LouisianaPigmentCompanyMember |
Contran | Intercorporate Services Agreements Fees |  |  |  |
Related Party Transaction [Line Items] |  |  |  |
Related party transaction | 32.0 us-gaap_RelatedPartyTransactionExpensesFromTransactionsWithRelatedParty / us-gaap_RelatedPartyTransactionAxis = vhi_IntercorporateServicesAgreementsFeesMember / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = vhi_ContranMember | 33.4 us-gaap_RelatedPartyTransactionExpensesFromTransactionsWithRelatedParty / us-gaap_RelatedPartyTransactionAxis = vhi_IntercorporateServicesAgreementsFeesMember / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = vhi_ContranMember | 36.1 us-gaap_RelatedPartyTransactionExpensesFromTransactionsWithRelatedParty / us-gaap_RelatedPartyTransactionAxis = vhi_IntercorporateServicesAgreementsFeesMember / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = vhi_ContranMember |
Contran | Intercorporate Services Agreements Fees | Scenario, Forecast |  |  |  |
Related Party Transaction [Line Items] |  |  |  |
Related party transaction |  | 35.8 us-gaap_RelatedPartyTransactionExpensesFromTransactionsWithRelatedParty / us-gaap_RelatedPartyTransactionAxis = vhi_IntercorporateServicesAgreementsFeesMember / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = vhi_ContranMember / us-gaap_StatementScenarioAxis = us-gaap_ScenarioForecastMember |  |
Contran | Pledge Fee Received |  |  |  |
Related Party Transaction [Line Items] |  |  |  |
Revenue and other income from related party transactions |  | 0.9 us-gaap_RelatedPartyTransactionOtherRevenuesFromTransactionsWithRelatedParty / us-gaap_FinancialInstrumentAxis = vhi_PledgeFeeReceivedMember / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = vhi_ContranMember | 0.8 us-gaap_RelatedPartyTransactionOtherRevenuesFromTransactionsWithRelatedParty / us-gaap_FinancialInstrumentAxis = vhi_PledgeFeeReceivedMember / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = vhi_ContranMember |
Contran | Tremont | Promissory Notes |  |  |  |
Related Party Transaction [Line Items] |  |  |  |
Guarantee Obligations, estimated exposure |  | 17.4 vhi_GuaranteeObligationsEstimatedExposure / us-gaap_DebtInstrumentAxis = vhi_PromissoryNotesMember / dei_LegalEntityAxis = vhi_TremontMember / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = vhi_ContranMember |  |
Contran | Tremont | Deferred Payment | Present Value |  |  |  |
Related Party Transaction [Line Items] |  |  |  |
Guarantee Obligations, estimated exposure |  | 8.5 vhi_GuaranteeObligationsEstimatedExposure / us-gaap_FinancialInstrumentAxis = vhi_DeferredPaymentMember / dei_LegalEntityAxis = vhi_TremontMember / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = vhi_ContranMember / us-gaap_ValuationTechniqueAxis = vhi_PresentValueMember |  |
Contran | Tremont | Deferred Payment | Face Value |  |  |  |
Related Party Transaction [Line Items] |  |  |  |
Guarantee Obligations, estimated exposure |  | 11.1 vhi_GuaranteeObligationsEstimatedExposure / us-gaap_FinancialInstrumentAxis = vhi_DeferredPaymentMember / dei_LegalEntityAxis = vhi_TremontMember / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = vhi_ContranMember / us-gaap_ValuationTechniqueAxis = vhi_FaceValueMember |  |
Contran | Kronos Worldwide, Inc. | Securities Pledged as Collateral |  |  |  |
Related Party Transaction [Line Items] |  |  |  |
Stock pledged as collateral |  | 12.0 us-gaap_InvestmentOwnedBalanceShares / us-gaap_FinancialInstrumentAxis = us-gaap_SecuritiesPledgedAsCollateralMember / dei_LegalEntityAxis = vhi_KronosMember / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = vhi_ContranMember | 12.0 us-gaap_InvestmentOwnedBalanceShares / us-gaap_FinancialInstrumentAxis = us-gaap_SecuritiesPledgedAsCollateralMember / dei_LegalEntityAxis = vhi_KronosMember / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = vhi_ContranMember |
Contran | WCS | Surety Bond |  |  |  |
Related Party Transaction [Line Items] |  |  |  |
Guarantee Obligations, maximum exposure |  |  |  | 86.6 us-gaap_GuaranteeObligationsMaximumExposure / us-gaap_GuaranteeObligationsByNatureAxis = us-gaap_SuretyBondMember / dei_LegalEntityAxis = vhi_WcsMember / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = vhi_ContranMember
Contran | WCS | Performance Guarantee |  |  |  |
Related Party Transaction [Line Items] |  |  |  |
Guarantee Obligations, estimated exposure | 5.5 vhi_GuaranteeObligationsEstimatedExposure / dei_LegalEntityAxis = vhi_WcsMember / us-gaap_LossContingenciesByNatureOfContingencyAxis = us-gaap_PerformanceGuaranteeMember / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = vhi_ContranMember | 5.5 vhi_GuaranteeObligationsEstimatedExposure / dei_LegalEntityAxis = vhi_WcsMember / us-gaap_LossContingenciesByNatureOfContingencyAxis = us-gaap_PerformanceGuaranteeMember / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = vhi_ContranMember | 5.5 vhi_GuaranteeObligationsEstimatedExposure / dei_LegalEntityAxis = vhi_WcsMember / us-gaap_LossContingenciesByNatureOfContingencyAxis = us-gaap_PerformanceGuaranteeMember / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = vhi_ContranMember |
Contran | WCS | Additional Collateral Trust |  |  |  |
Related Party Transaction [Line Items] |  |  |  |
Guarantee Obligations, estimated exposure |  | 56.0 vhi_GuaranteeObligationsEstimatedExposure / us-gaap_FinancialInstrumentAxis = vhi_AdditionalCollateralTrustMember / dei_LegalEntityAxis = vhi_WcsMember / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = vhi_ContranMember |  |
Related party transaction | 0.7 us-gaap_RelatedPartyTransactionExpensesFromTransactionsWithRelatedParty / us-gaap_FinancialInstrumentAxis = vhi_AdditionalCollateralTrustMember / dei_LegalEntityAxis = vhi_WcsMember / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = vhi_ContranMember |  |  |
Contran | Revolving Credit Facility |  |  |  |
Related Party Transaction [Line Items] |  |  |  |
Interest expense, related party | 0.1 us-gaap_InterestExpenseRelatedParty / us-gaap_CreditFacilityAxis = us-gaap_RevolvingCreditFacilityMember / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = vhi_ContranMember | 11.0 us-gaap_InterestExpenseRelatedParty / us-gaap_CreditFacilityAxis = us-gaap_RevolvingCreditFacilityMember / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = vhi_ContranMember | 19.0 us-gaap_InterestExpenseRelatedParty / us-gaap_CreditFacilityAxis = us-gaap_RevolvingCreditFacilityMember / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = vhi_ContranMember |
Contran | Letter Of Credit | WCS |  |  |  |
Related Party Transaction [Line Items] |  |  |  |
Guarantee Obligations, maximum exposure |  | 6.1 us-gaap_GuaranteeObligationsMaximumExposure / us-gaap_CreditFacilityAxis = us-gaap_LetterOfCreditMember / dei_LegalEntityAxis = vhi_WcsMember / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = vhi_ContranMember |  |
Costs related to the Letter of Credit | 0.1 us-gaap_LineOfCreditFacilityCommitmentFeeAmount / us-gaap_CreditFacilityAxis = us-gaap_LetterOfCreditMember / dei_LegalEntityAxis = vhi_WcsMember / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = vhi_ContranMember | 0.1 us-gaap_LineOfCreditFacilityCommitmentFeeAmount / us-gaap_CreditFacilityAxis = us-gaap_LetterOfCreditMember / dei_LegalEntityAxis = vhi_WcsMember / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = vhi_ContranMember | 0.1 us-gaap_LineOfCreditFacilityCommitmentFeeAmount / us-gaap_CreditFacilityAxis = us-gaap_LetterOfCreditMember / dei_LegalEntityAxis = vhi_WcsMember / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = vhi_ContranMember |
Contran | Unsecured Revolving Demand Note Receivable |  |  |  |
Related Party Transaction [Line Items] |  |  |  |
Unsecured Revolving Demand Promissory note |  |  |  | 65 vhi_RevolvingDemandPromissoryNoteRelatedPartyMaximumLoanCapacity / us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis = vhi_UnsecuredRevolvingDemandNoteReceivableMember / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = vhi_ContranMember
Interest at prime plus rate |  |  |  | 3.00%us-gaap_LoansReceivableBasisSpreadOnVariableRate / us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis = vhi_UnsecuredRevolvingDemandNoteReceivableMember / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = vhi_ContranMember
Unsecured Revolving Demand Promissory Note Receivable, due on demand no earlier than date |  | Dec. 31, 2014 |  |
Loan repayment received | 64.0 us-gaap_RepaymentOfNotesReceivableFromRelatedParties / us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis = vhi_UnsecuredRevolvingDemandNoteReceivableMember / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = vhi_ContranMember |  |  |
Contran | Interest Income | Unsecured Revolving Demand Note Receivable |  |  |  |
Related Party Transaction [Line Items] |  |  |  |
Revenue and other income from related party transactions | 0.8 us-gaap_RelatedPartyTransactionOtherRevenuesFromTransactionsWithRelatedParty / us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis = vhi_UnsecuredRevolvingDemandNoteReceivableMember / us-gaap_IncomeStatementLocationAxis = us-gaap_InterestIncomeMember / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = vhi_ContranMember |  |  |
Contran and Other Affiliates |  |  |  |
Related Party Transaction [Line Items] |  |  |  |
Related party transaction cash received for insurance premium | 6.5 vhi_RelatedPartyTransactionCashReceivedForInsurancePremium / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = vhi_ContranAndOtherAffiliatesMember | 5.6 vhi_RelatedPartyTransactionCashReceivedForInsurancePremium / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = vhi_ContranAndOtherAffiliatesMember | 5.7 vhi_RelatedPartyTransactionCashReceivedForInsurancePremium / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = vhi_ContranAndOtherAffiliatesMember |
TIMET | BMI | Utility Services Fee |  |  |  |
Related Party Transaction [Line Items] |  |  |  |
Related party transaction | $ 1.8 us-gaap_RelatedPartyTransactionExpensesFromTransactionsWithRelatedParty / dei_LegalEntityAxis = vhi_BmiMember / us-gaap_RelatedPartyTransactionAxis = vhi_UtilityServicesFeeMember / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = vhi_TimetMember |  |  |

X
- Definition Maximum potential amount of future payments (undiscounted) the guarantor could be required to make under the guarantee or each group of similar guarantees before reduction for potential recoveries under recourse or collateralization provisions. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 460 -SubTopic 10 -Section 50 -Paragraph 4 -Subparagraph (b)(1) -URI http://asc.fasb.org/extlink&oid=6851643&loc=d3e12069-110248 + Details
Name: | us-gaap_GuaranteeObligationsMaximumExposure
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Amount of interest expense incurred on a debt or other obligation to related party. + References No definition available. + Details
Name: | us-gaap_InterestExpenseRelatedParty
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Balance held at close of period in number of shares. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 946 -SubTopic 320 -Section S99 -Paragraph 4 -Subparagraph (SX 210.12-12C.Column B) -URI http://asc.fasb.org/extlink&oid=34726532&loc=d3e611225-123010 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 946 -SubTopic 320 -Section S99 -Paragraph 6 -Subparagraph (SX 210.12-14.Column B) -URI http://asc.fasb.org/extlink&oid=34726532&loc=d3e611322-123010 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 946 -SubTopic 320 -Section S99 -Paragraph 1 -Subparagraph (SX 210.12-12.Column B) -URI http://asc.fasb.org/extlink&oid=34726532&loc=d3e611133-123010 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 12C -Paragraph Column B -Article 12 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 12 -Paragraph Column B -Article 12 Reference 6: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 14 -Paragraph Column B -Article 12 + Details
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Namespace Prefix: | us-gaap_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | instant

X
- Definition Amount of the fee for available but unused credit capacity under the credit facility. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.19(b),22(b)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 19, 22 -Article 5 + Details
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Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition The percentage points (also referred to as 'margin') added to the reference rate as stated in the loan agreement and used to compute the variable rate on the loans receivable. For instance, the loan agreement might state that the interest rate the borrower is obligated to pay is the London Interbank Offered Rate (LIBOR) plus three quarters (3/4) of a percentage point adjusted quarterly (each three months). LIBOR in this example is the index or reference rate, 3/4 percentage point is the margin, the reference rate plus the margin is the fully indexed rate. This element would be used to report separately the margin. + References No definition available. + Details
Name: | us-gaap_LoansReceivableBasisSpreadOnVariableRate
Namespace Prefix: | us-gaap_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | instant

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- Definition Date of maturity or expiration of arrangements with a related party (for example, but not limited to, leasing and debt arrangements between related parties), in CCYY-MM-DD format. + References No definition available. + Details
Name: | us-gaap_RelatedPartyTransactionDate
Namespace Prefix: | us-gaap_
Data Type: | xbrli:dateItemType
Balance Type: | na
Period Type: | duration

X
- Definition Expenses recognized resulting from transactions (excluding transactions that are eliminated in consolidated or combined financial statements) with related party. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 850 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=6457730&loc=d3e39549-107864 + Details
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Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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

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- Definition Reflects the sum of all other revenue and income realized from sales and other transactions (excluding transactions that are eliminated in consolidated or combined financial statements) with related party during the period. + References No definition available. + Details
Name: | us-gaap_RelatedPartyTransactionOtherRevenuesFromTransactionsWithRelatedParty
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

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- Definition Purchases during the period (excluding transactions that are eliminated in consolidated or combined financial statements) with related party. + References No definition available. + Details
Name: | us-gaap_RelatedPartyTransactionPurchasesFromRelatedParty
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition The cash inflow from a loan, supported by a promissory note, granted to related parties where one party can exercise control or significant influence over another party; including affiliates, owners or officers and their immediate families, pension trusts, and so forth. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Financing Activities -URI http://asc.fasb.org/extlink&oid=6513228 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 14 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3255-108585 + Details
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Namespace Prefix: | us-gaap_
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Balance Type: | debit
Period Type: | duration

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- Definition Amount of revenue, fees and commissions earned from transactions between (a) a parent company and its subsidiaries; (b) subsidiaries of a common parent; (c) an entity and trusts for the benefit of employees, for example, but not limited to, pension and profit-sharing trusts that are managed by or under the trusteeship of the entity's management; (d) an entity and its principal, owners, management, or members of their immediate families; and (e) affiliates. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 225 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03.1(e)) -URI http://asc.fasb.org/extlink&oid=26872669&loc=d3e20235-122688 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 03 -Paragraph 1 -Article 5 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Related Parties -URI http://asc.fasb.org/extlink&oid=16382449 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 946 -SubTopic 225 -Section S99 -Paragraph 1 -Subparagraph (SX 210.6-07.1(c)) -URI http://asc.fasb.org/extlink&oid=6488393&loc=d3e606610-122999 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 07 -Paragraph b -Subparagraph 1 -Article 6 + Details
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Namespace Prefix: | us-gaap_
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Balance Type: | credit
Period Type: | duration

X
- Definition Currently estimated potential amount of future payments (undiscounted) the guarantor could be required to make under the guarantee or each group of similar guarantees before reduction for potential recoveries under recourse or collateralization provisions. + References No definition available. + Details
Name: | vhi_GuaranteeObligationsEstimatedExposure
Namespace Prefix: | vhi_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

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- Definition Related party transaction cash received for insurance premium. + References No definition available. + Details
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Namespace Prefix: | vhi_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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- Definition Revolving demand promissory note related party maximum loan capacity. + References No definition available. + Details
Name: | vhi_RevolvingDemandPromissoryNoteRelatedPartyMaximumLoanCapacity
Namespace Prefix: | vhi_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

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

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- Details
Name: | us-gaap_RelatedPartyTransactionsByRelatedPartyAxis=vhi_ContranMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
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Namespace Prefix: |
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