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Quarterly Results of Operations - Schedule of Quarterly Results of Operations (Parenthetical) (Detail) (USD $) In Millions, unless otherwise specified | 3 Months Ended | 12 Months Ended | 1 Months Ended | 3 Months Ended | 6 Months Ended
--- | --- | --- | --- | --- | ---
Sep. 30, 2014 | Jun. 30, 2014 | Dec. 31, 2014 | Dec. 31, 2013 | Dec. 31, 2012 | Jul. 31, 2013 | Feb. 28, 2013 | Mar. 31, 2013 | Dec. 31, 2013 | Sep. 30, 2013 | Dec. 31, 2013
Litigation settlement gain |  |  |  |  | $ 14.7 us-gaap_GainLossRelatedToLitigationSettlement |  |  |  |  |  |
Insurance recoveries |  |  | 10.4 us-gaap_InsuranceRecoveries | 9.4 us-gaap_InsuranceRecoveries | 3.3 us-gaap_InsuranceRecoveries |  |  |  |  |  |
Non-cash income tax benefit recognized related to release of portion of reserve for uncertain tax positions |  | 3.2 us-gaap_TaxAdjustmentsSettlementsAndUnusualProvisions |  |  |  |  |  |  |  |  |
Provision (benefit) for income taxes related to previous periods | 1.2 us-gaap_IncomeTaxReconciliationPriorYearIncomeTaxes |  |  |  |  |  |  |  |  |  |
Kronos Worldwide, Inc. | Principal Prepayment | Term Loan |  |  |  |  |  |  |  |  |  |  |
Repayment of credit facility |  |  |  |  |  | 100 us-gaap_RepaymentsOfLongTermDebt / us-gaap_IntercompanyForeignCurrencyBalanceByDescriptionAxis = vhi_PrincipalPrepaymentMember / dei_LegalEntityAxis = vhi_KronosMember / us-gaap_LongtermDebtTypeAxis = vhi_TermLoanMember | 290 us-gaap_RepaymentsOfLongTermDebt / us-gaap_IntercompanyForeignCurrencyBalanceByDescriptionAxis = vhi_PrincipalPrepaymentMember / dei_LegalEntityAxis = vhi_KronosMember / us-gaap_LongtermDebtTypeAxis = vhi_TermLoanMember |  |  |  |
Attributable to Parent |  |  |  |  |  |  |  |  |  |  |
Loss on prepayment of debt |  |  |  |  |  |  |  | 3.4 us-gaap_ExtinguishmentOfDebtGainLossNetOfTax / us-gaap_IncomeStatementLocationAxis = vhi_AttributableToParentMember |  |  |
Attributable to Parent Net of Tax |  |  |  |  |  |  |  |  |  |  |
Loss on prepayment of debt |  |  |  |  |  |  |  |  |  | 1.2 us-gaap_ExtinguishmentOfDebtGainLossNetOfTax / us-gaap_IncomeStatementLocationAxis = vhi_AttributableToParentNetOfTaxMember |
Insurance recoveries | 7.3 us-gaap_InsuranceRecoveries / us-gaap_IncomeStatementLocationAxis = vhi_AttributableToParentNetOfTaxMember |  |  |  |  |  |  |  | 4.7 us-gaap_InsuranceRecoveries / us-gaap_IncomeStatementLocationAxis = vhi_AttributableToParentNetOfTaxMember |  |
Attributable to Parent Net of Tax | Basic Management Inc And Landwell |  |  |  |  |  |  |  |  |  |  |
Bargain purchase after-tax gain and remeasurement of existing investment |  |  |  | 46.6 vhi_BusinessCombinationGainOnBargainPurchaseAndRemeasurementOfExistingInvestmentAfterTax / us-gaap_BusinessAcquisitionAxis = vhi_BasicManagementIncAndLandwellMember / us-gaap_IncomeStatementLocationAxis = vhi_AttributableToParentNetOfTaxMember |  |  |  |  |  |  |
Attributable to Parent Net of Tax | NL |  |  |  |  |  |  |  |  |  |  |
Litigation settlement gain |  |  |  |  |  |  |  |  |  | 17.9 us-gaap_GainLossRelatedToLitigationSettlement / us-gaap_IncomeStatementLocationAxis = vhi_AttributableToParentNetOfTaxMember / dei_LegalEntityAxis = vhi_NlIndustriesIncMember |
Other Expense | Kronos Worldwide, Inc. |  |  |  |  |  |  |  |  |  |  |
Pre-tax charges of unabsorbed fixed production and other costs |  |  |  |  |  |  |  |  |  | 7 vhi_IncomeStatementEffectEventsAffectingQuarterlyComparisons / us-gaap_IncomeStatementLocationAxis = us-gaap_OtherExpenseMember / dei_LegalEntityAxis = vhi_KronosMember | 28 vhi_IncomeStatementEffectEventsAffectingQuarterlyComparisons / us-gaap_IncomeStatementLocationAxis = us-gaap_OtherExpenseMember / dei_LegalEntityAxis = vhi_KronosMember
Unabsorbed Fixed Costs | Kronos Worldwide, Inc. |  |  |  |  |  |  |  |  |  |  |
Pre-tax charges of unabsorbed fixed production and other costs |  |  |  |  |  |  |  |  |  |  | 19 vhi_IncomeStatementEffectEventsAffectingQuarterlyComparisons / us-gaap_IncomeStatementLocationAxis = vhi_UnabsorbedFixedCostsMember / dei_LegalEntityAxis = vhi_KronosMember
Unabsorbed Fixed Costs | Kronos Worldwide, Inc. | Foreign Pension Plan Defined Benefit | Pension Curtailment Charge | Canada |  |  |  |  |  |  |  |  |  |  |
Pre-tax charges of unabsorbed fixed production and other costs |  |  |  |  |  |  |  |  | 7 vhi_IncomeStatementEffectEventsAffectingQuarterlyComparisons / us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis = vhi_CanadianDefinedBenefitPensionPlanCurtailmentMember / us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis = us-gaap_ForeignPensionPlansDefinedBenefitMember / us-gaap_IncomeStatementLocationAxis = vhi_UnabsorbedFixedCostsMember / dei_LegalEntityAxis = vhi_KronosMember / us-gaap_StatementGeographicalAxis = country_CA |  |
Severance and Other Back-to-work Expenses | Kronos Worldwide, Inc. |  |  |  |  |  |  |  |  |  |  |
Pre-tax charges of unabsorbed fixed production and other costs |  |  |  |  |  |  |  |  |  |  | $ 2 vhi_IncomeStatementEffectEventsAffectingQuarterlyComparisons / us-gaap_IncomeStatementLocationAxis = vhi_CanadianCollectiveBargainingAgreementSeveranceAndOtherEmployeeRelatedCostsMember / dei_LegalEntityAxis = vhi_KronosMember

X
- Definition The difference between the reacquisition price and the net carrying amount of the extinguished debt recognized currently as a component of income in the period of extinguishment, net of tax. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 470 -SubTopic 50 -Section 40 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6850294&loc=d3e12317-112629 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 470 -SubTopic 50 -Section 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6401765&loc=d3e13305-112630 + Details
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- Definition Amount of gain (loss) recognized in settlement of litigation and insurance claims. Excludes claims within an insurance entity's normal claims settlement process. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 450 -SubTopic 20 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=25496072&loc=d3e14326-108349 + Details
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- Definition Amount of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations attributable to revisions of previously reported income tax expense (benefit). + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 12 -URI http://asc.fasb.org/extlink&oid=6907707&loc=d3e32687-109319 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 13 -URI http://asc.fasb.org/extlink&oid=6907707&loc=d3e32698-109319 + Details
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- Definition The amount recovered from insurance. These recoveries reduce costs and losses that are reported as a separate line item under operating expenses. + 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 210.5-03.3) -URI http://asc.fasb.org/extlink&oid=26872669&loc=d3e20235-122688 + Details
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- Definition The cash outflow for debt initially having maturity due after one year or beyond the normal operating cycle, if longer. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 15 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3291-108585 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Financing Activities -URI http://asc.fasb.org/extlink&oid=6513228 + Details
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- Definition Amount of increase (decrease) to previously recorded tax expense. Includes, but is not limited to, significant settlements of income tax disputes, and unusual tax positions or infrequent actions taken by the entity, including tax assessment reversal, and IRS tax settlement. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 25 -Paragraph 8 -URI http://asc.fasb.org/extlink&oid=29652012&loc=d3e28446-109314 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 25 -Paragraph 10 -URI http://asc.fasb.org/extlink&oid=29652012&loc=d3e28511-109314 + Details
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- Definition Aggregate after tax gain consisting of: (1) In a business combination achieved in stages, this element represents the amount of gain recognized by the entity as a result of remeasuring to fair value the equity interest in the acquiree it held before the business combination and (2) In a business combination in which the amount of net identifiable assets acquired and liabilities assumed exceeds the aggregate consideration transferred or to be transferred (as defined), this element represents the amount of gain recognized by the entity. + References No definition available. + Details
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