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Financial Instruments - Additional Information (Detail) |  |  |  | 12 Months Ended |
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Dec. 31, 2014 USD ($) | Dec. 31, 2013 USD ($) | Dec. 31, 2014 Amalgamated Sugar Company LLC USD ($) | Dec. 31, 2014 Kronos Worldwide, Inc. 2014 Term Loan Per Thousand Dollar Principal Amount USD ($) | Dec. 31, 2014 Kronos Worldwide, Inc. Forward Contracts USD ($) | Dec. 31, 2013 Kronos Worldwide, Inc. Forward Contracts USD ($) | Dec. 31, 2014 Kronos Worldwide, Inc. Norwegian Kroner Forward Contracts USD ($) | Dec. 31, 2014 Kronos Worldwide, Inc. Norwegian Kroner Forward Contracts Euro EUR (€) | Dec. 31, 2014 Kronos Worldwide, Inc. Minimum Norwegian Kroner Forward Contracts USD ($) | Dec. 31, 2014 Kronos Worldwide, Inc. Minimum Norwegian Kroner Forward Contracts Euro EUR (€) | Dec. 31, 2014 Kronos Worldwide, Inc. Maximum Norwegian Kroner Forward Contracts USD ($) | Dec. 31, 2014 Kronos Worldwide, Inc. Maximum Norwegian Kroner Forward Contracts Euro EUR (€)
Financial Instrument At Fair Value [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Notional amount currency forward contract |  |  |  |  |  |  | $ 37,000,000 invest_DerivativeNotionalAmount / us-gaap_FinancialInstrumentAxis = us-gaap_ForwardContractsMember / us-gaap_IntercompanyForeignCurrencyBalanceByDescriptionAxis = vhi_NorwegianKronerMember / dei_LegalEntityAxis = vhi_KronosMember | € 31,700,000 invest_DerivativeNotionalAmount / us-gaap_CurrencyAxis = currency_EUR / us-gaap_FinancialInstrumentAxis = us-gaap_ForwardContractsMember / us-gaap_IntercompanyForeignCurrencyBalanceByDescriptionAxis = vhi_NorwegianKronerMember / dei_LegalEntityAxis = vhi_KronosMember |  |  |  |
Exchange floor rate |  |  |  |  |  |  |  |  | 6.75 us-gaap_DerivativeForwardExchangeRate1 / us-gaap_FinancialInstrumentAxis = us-gaap_ForwardContractsMember / us-gaap_IntercompanyForeignCurrencyBalanceByDescriptionAxis = vhi_NorwegianKronerMember / dei_LegalEntityAxis = vhi_KronosMember / us-gaap_RangeAxis = us-gaap_MinimumMember | 8.52 us-gaap_DerivativeForwardExchangeRate1 / us-gaap_CurrencyAxis = currency_EUR / us-gaap_FinancialInstrumentAxis = us-gaap_ForwardContractsMember / us-gaap_IntercompanyForeignCurrencyBalanceByDescriptionAxis = vhi_NorwegianKronerMember / dei_LegalEntityAxis = vhi_KronosMember / us-gaap_RangeAxis = us-gaap_MinimumMember | 7.11 us-gaap_DerivativeForwardExchangeRate1 / us-gaap_FinancialInstrumentAxis = us-gaap_ForwardContractsMember / us-gaap_IntercompanyForeignCurrencyBalanceByDescriptionAxis = vhi_NorwegianKronerMember / dei_LegalEntityAxis = vhi_KronosMember / us-gaap_RangeAxis = us-gaap_MaximumMember | 8.81 us-gaap_DerivativeForwardExchangeRate1 / us-gaap_CurrencyAxis = currency_EUR / us-gaap_FinancialInstrumentAxis = us-gaap_ForwardContractsMember / us-gaap_IntercompanyForeignCurrencyBalanceByDescriptionAxis = vhi_NorwegianKronerMember / dei_LegalEntityAxis = vhi_KronosMember / us-gaap_RangeAxis = us-gaap_MaximumMember
Maturity rate of derivative |  |  |  |  |  |  |  |  | 2,700,000 vhi_DerivativeForwardExchangeContractMaturityPerMonth / us-gaap_FinancialInstrumentAxis = us-gaap_ForwardContractsMember / us-gaap_IntercompanyForeignCurrencyBalanceByDescriptionAxis = vhi_NorwegianKronerMember / dei_LegalEntityAxis = vhi_KronosMember / us-gaap_RangeAxis = us-gaap_MinimumMember | 1,100,000 vhi_DerivativeForwardExchangeContractMaturityPerMonth / us-gaap_CurrencyAxis = currency_EUR / us-gaap_FinancialInstrumentAxis = us-gaap_ForwardContractsMember / us-gaap_IntercompanyForeignCurrencyBalanceByDescriptionAxis = vhi_NorwegianKronerMember / dei_LegalEntityAxis = vhi_KronosMember / us-gaap_RangeAxis = us-gaap_MinimumMember | 5,000,000 vhi_DerivativeForwardExchangeContractMaturityPerMonth / us-gaap_FinancialInstrumentAxis = us-gaap_ForwardContractsMember / us-gaap_IntercompanyForeignCurrencyBalanceByDescriptionAxis = vhi_NorwegianKronerMember / dei_LegalEntityAxis = vhi_KronosMember / us-gaap_RangeAxis = us-gaap_MaximumMember | 5,000,000 vhi_DerivativeForwardExchangeContractMaturityPerMonth / us-gaap_CurrencyAxis = currency_EUR / us-gaap_FinancialInstrumentAxis = us-gaap_ForwardContractsMember / us-gaap_IntercompanyForeignCurrencyBalanceByDescriptionAxis = vhi_NorwegianKronerMember / dei_LegalEntityAxis = vhi_KronosMember / us-gaap_RangeAxis = us-gaap_MaximumMember
Estimated fair value of currency forward contracts | (4,200,000)vhi_ForeignCurrencyContractAssetLiabilityNetFairValueDisclosure | (1,000,000)vhi_ForeignCurrencyContractAssetLiabilityNetFairValueDisclosure |  |  | 4,200,000 vhi_ForeignCurrencyContractAssetLiabilityNetFairValueDisclosure / us-gaap_FinancialInstrumentAxis = us-gaap_ForwardContractsMember / dei_LegalEntityAxis = vhi_KronosMember | 1,000,000 vhi_ForeignCurrencyContractAssetLiabilityNetFairValueDisclosure / us-gaap_FinancialInstrumentAxis = us-gaap_ForwardContractsMember / dei_LegalEntityAxis = vhi_KronosMember |  |  |  |  |  |
Estimated fair value of currency forward contracts included accounts and other receivables |  |  |  |  |  | 200,000 vhi_FairValueOfCurrencyForwardContractsRecognizedInAccountsAndOtherReceivables / us-gaap_FinancialInstrumentAxis = us-gaap_ForwardContractsMember / dei_LegalEntityAxis = vhi_KronosMember |  |  |  |  |  |
Estimated fair value of currency forward contracts included accounts payable and accrued liabilities |  |  |  |  | 4,200,000 vhi_FairValueOfCurrencyForwardContractsRecognizedInAccountsPayableAndAccruedLiabilities / us-gaap_FinancialInstrumentAxis = us-gaap_ForwardContractsMember / dei_LegalEntityAxis = vhi_KronosMember | 1,200,000 vhi_FairValueOfCurrencyForwardContractsRecognizedInAccountsPayableAndAccruedLiabilities / us-gaap_FinancialInstrumentAxis = us-gaap_ForwardContractsMember / dei_LegalEntityAxis = vhi_KronosMember |  |  |  |  |  |
Currency transaction loss |  |  |  |  | (4,200,000)us-gaap_GainLossOnForeignCurrencyDerivativesRecordedInEarningsNet / us-gaap_FinancialInstrumentAxis = us-gaap_ForwardContractsMember / dei_LegalEntityAxis = vhi_KronosMember | (1,000,000)us-gaap_GainLossOnForeignCurrencyDerivativesRecordedInEarningsNet / us-gaap_FinancialInstrumentAxis = us-gaap_ForwardContractsMember / dei_LegalEntityAxis = vhi_KronosMember |  |  |  |  |  |
Estimated market price of the notes |  |  |  | 983.1 us-gaap_NotesPayableFairValueDisclosure / us-gaap_DebtInstrumentAxis = vhi_TwentyFourteenTermLoanMember / dei_LegalEntityAxis = vhi_KronosMember / us-gaap_LongtermDebtTypeAxis = vhi_PerThousandDollarPrincipalAmountMember |  |  |  |  |  |  |  |
Principal amount of debt instrument |  |  |  | 1,000 us-gaap_DebtInstrumentFaceAmount / us-gaap_DebtInstrumentAxis = vhi_TwentyFourteenTermLoanMember / dei_LegalEntityAxis = vhi_KronosMember / us-gaap_LongtermDebtTypeAxis = vhi_PerThousandDollarPrincipalAmountMember |  |  |  |  |  |  |  |
Marketable securities | $ 255,600,000 us-gaap_AvailableForSaleSecuritiesNoncurrent | $ 253,300,000 us-gaap_AvailableForSaleSecuritiesNoncurrent | $ 250,000,000 us-gaap_AvailableForSaleSecuritiesNoncurrent / us-gaap_DebtInstrumentAxis = vhi_AmalgamatedSugarCompanyLlcMember |  |  |  |  |  |  |  |  |

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- Definition Aggregate notional amount specified by the derivative(s). Expressed as an absolute value. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Article 12 -Section 13 -Sentence Column B + Details
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- Definition Investments in debt and equity securities which are categorized neither as held-to-maturity nor trading and which are intended to be sold or mature more than one year from the balance sheet date or operating cycle, if longer. Such securities are reported at fair value; unrealized gains (losses) related to Available-for-sale Securities are excluded from earnings and reported in a separate component of shareholders' equity (other comprehensive income), unless the Available-for-sale security is designated as a hedge or is determined to have had an other than temporary decline in fair value below its amortized cost basis. All or a portion of the unrealized holding gain (loss) of an Available-for-sale security that is designated as being hedged in a fair value hedge is recognized in earnings during the period of the hedge, as are other than temporary declines in fair value below the cost basis for investments in equity securities and debt securities that an entity intends to sell or it is more likely than not that it will be required to sell before the recovery of its amortized cost basis. Other than temporary declines in fair value below the cost basis for debt securities categorized as Available-for-sale that an entity does not intend to sell and for which it is not more likely than not that the entity will be required to sell before the recovery of its amortized cost basis are bifurcated into credit losses and losses related to all other factors. Other than temporary declines in fair value below cost basis related to credit losses are recognized in earnings, and losses related to all other factors are recognized in other comprehensive income. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 45 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6871852&loc=d3e26626-111562 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Available-for-Sale Securities -URI http://asc.fasb.org/extlink&oid=6505594 + Details
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- Definition Face (par) amount of debt instrument at time of issuance. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 835 -SubTopic 30 -Section 45 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6451184&loc=d3e28551-108399 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 835 -SubTopic 30 -Section 55 -Paragraph 8 -URI http://asc.fasb.org/extlink&oid=34725769&loc=d3e28878-108400 + Details
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- Definition Contractual rate at which a foreign currency can be purchased or sold. + References No definition available. + Details
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- Definition Aggregate impact of foreign currency derivatives on earnings for the period. Includes impact of foreign currency cash flow hedge ineffectiveness and the ineffectiveness of fair value hedging derivatives and full change in fair value of the foreign currency derivatives not designated as hedging instruments. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 4A -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=35706170&loc=SL5618551-113959 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 4C -URI http://asc.fasb.org/extlink&oid=35706170&loc=SL5624171-113959 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 25 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6886632&loc=d3e76258-113986 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 4D -Subparagraph (a)(2) -URI http://asc.fasb.org/extlink&oid=35706170&loc=SL5624177-113959 + Details
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- Definition Fair value portion of notes payable. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 19, 20, 22 -Article 5 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.19,20,22) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
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- Definition Notional amount of currency the company is contractually obligated to exchange per month. + References No definition available. + Details
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- Definition Fair value of currency forward contracts recognized in accounts and other receivables. + References No definition available. + Details
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- Definition Fair value of currency forward contracts recognized in accounts payable and accrued liabilities. + References No definition available. + Details
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- Details
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- Definition Foreign currency contract asset liability net fair value disclosure. + References No definition available. + Details
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