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Income Taxes - Components of Net Deferred Tax Liability (Detail) (USD $) In Millions, unless otherwise specified | Dec. 31, 2014 | Dec. 31, 2013
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Tax effect of temporary differences related to: |  |
Inventories | $ 5.4 us-gaap_DeferredTaxAssetsInventory | $ 4.4 us-gaap_DeferredTaxAssetsInventory
Accrued OPEB costs | 4.8 us-gaap_DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsPostretirementBenefits | 4.6 us-gaap_DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsPostretirementBenefits
Accrued pension costs | 52.0 us-gaap_DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsPensions | 21.8 us-gaap_DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsPensions
Accrued environmental liabilities | 38.8 us-gaap_DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsAccruedLiabilities | 40.1 us-gaap_DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsAccruedLiabilities
Other deductible differences | 40.3 us-gaap_DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsOther | 58.8 us-gaap_DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsOther
Tax loss and tax credit carryforwards | 163.6 us-gaap_DeferredTaxAssetsTaxCreditCarryforwards | 191.8 us-gaap_DeferredTaxAssetsTaxCreditCarryforwards
Valuation allowance | (0.1)us-gaap_DeferredTaxAssetsValuationAllowance | (0.1)us-gaap_DeferredTaxAssetsValuationAllowance
Adjusted gross deferred tax assets (liabilities) | 304.8 us-gaap_DeferredTaxAssetsNet | 321.4 us-gaap_DeferredTaxAssetsNet
Netting of items by tax jurisdiction, assets | (127.0)vhi_DeferredTaxAssetNettingByJurisdiction | (149.2)vhi_DeferredTaxAssetNettingByJurisdiction
Total | 177.8 us-gaap_DeferredTaxAssetsLiabilitiesNet | 172.2 us-gaap_DeferredTaxAssetsLiabilitiesNet
Less net current deferred tax asset (liability) | 13.4 us-gaap_DeferredTaxAssetsLiabilitiesNetCurrent | 23.0 us-gaap_DeferredTaxAssetsLiabilitiesNetCurrent
Net noncurrent deferred tax asset (liability) | 164.4 us-gaap_DeferredTaxAssetsLiabilitiesNetNoncurrent | 149.2 us-gaap_DeferredTaxAssetsLiabilitiesNetNoncurrent
Tax effect of temporary differences related to: |  |
Inventories | (5.2)us-gaap_DeferredTaxLiabilitiesDeferredExpenseCapitalizedInventoryCosts | (2.6)us-gaap_DeferredTaxLiabilitiesDeferredExpenseCapitalizedInventoryCosts
Marketable securities | (126.4)vhi_DeferredTaxLiabilitiesUnrealizedGainsOnAvailableForSaleSecurities | (145.8)vhi_DeferredTaxLiabilitiesUnrealizedGainsOnAvailableForSaleSecurities
Property and equipment | (109.2)us-gaap_DeferredTaxLiabilitiesPropertyPlantAndEquipment | (115.8)us-gaap_DeferredTaxLiabilitiesPropertyPlantAndEquipment
Other taxable differences | (21.6)us-gaap_DeferredTaxLiabilitiesOther | (35.1)us-gaap_DeferredTaxLiabilitiesOther
Investments in subsidiaries and affiliates | (278.7)vhi_DeferredTaxLiabilitiesInvestmentsInSubsidiariesAndAffiliates | (280.6)vhi_DeferredTaxLiabilitiesInvestmentsInSubsidiariesAndAffiliates
Tax on unremitted earnings of non-U.S. subsidiaries | (2.6)us-gaap_DeferredTaxLiabilitiesUndistributedForeignEarnings | (2.6)us-gaap_DeferredTaxLiabilitiesUndistributedForeignEarnings
Adjusted gross deferred tax assets (liabilities) | (543.7)us-gaap_DeferredIncomeTaxLiabilities | (582.5)us-gaap_DeferredIncomeTaxLiabilities
Netting of items by tax jurisdiction, liabilities | 127.0 vhi_DeferredTaxLiabilitiesNettingOfItemsByTaxJurisdiction | 149.2 vhi_DeferredTaxLiabilitiesNettingOfItemsByTaxJurisdiction
Total | (416.7)us-gaap_DeferredTaxLiabilities | (433.3)us-gaap_DeferredTaxLiabilities
Less net current deferred tax asset (liability) | (3.9)us-gaap_DeferredTaxLiabilitiesCurrent | (2.2)us-gaap_DeferredTaxLiabilitiesCurrent
Net noncurrent deferred tax asset (liability) | $ (412.8)us-gaap_DeferredTaxLiabilitiesNoncurrent | $ (431.1)us-gaap_DeferredTaxLiabilitiesNoncurrent

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- Definition Amount before allocation of valuation allowances of deferred tax asset attributable to deductible temporary differences from other reserves and accruals not separately disclosed. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 6 -URI http://asc.fasb.org/extlink&oid=6907707&loc=d3e32621-109319 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 8 -URI http://asc.fasb.org/extlink&oid=6907707&loc=d3e32632-109319 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 25 -Paragraph 20 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=29652012&loc=d3e28680-109314 + Details
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- Definition Amount of deferred tax assets for which it is more likely than not that a tax benefit will not be realized. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=6907707&loc=d3e32537-109319 + Details
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