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Business and Geographic Segments - Total Assets Held by Business Segments (Detail) (USD $) In Millions, unless otherwise specified | Dec. 31, 2014 | Dec. 31, 2013 | Dec. 31, 2012
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Segment Reporting Information [Line Items] |  |  |
Total assets | $ 2,967.2 us-gaap_Assets | $ 2,967.2 us-gaap_Assets | $ 3,170.5 us-gaap_Assets
Corporate and eliminations |  |  |
Segment Reporting Information [Line Items] |  |  |
Total assets | 361.7 us-gaap_Assets / us-gaap_ConsolidationItemsAxis = vhi_CorporateAndEliminationsMember | 375.5 us-gaap_Assets / us-gaap_ConsolidationItemsAxis = vhi_CorporateAndEliminationsMember | 405.9 us-gaap_Assets / us-gaap_ConsolidationItemsAxis = vhi_CorporateAndEliminationsMember
Chemicals |  |  |
Segment Reporting Information [Line Items] |  |  |
Total assets | 2,016.0 us-gaap_Assets / us-gaap_StatementBusinessSegmentsAxis = vhi_ChemicalsMember | 1,984.8 us-gaap_Assets / us-gaap_StatementBusinessSegmentsAxis = vhi_ChemicalsMember | 2,401.1 us-gaap_Assets / us-gaap_StatementBusinessSegmentsAxis = vhi_ChemicalsMember
Component Products |  |  |
Segment Reporting Information [Line Items] |  |  |
Total assets | 85.5 us-gaap_Assets / us-gaap_StatementBusinessSegmentsAxis = vhi_ComponentProductsMember | 83.1 us-gaap_Assets / us-gaap_StatementBusinessSegmentsAxis = vhi_ComponentProductsMember | 82.3 us-gaap_Assets / us-gaap_StatementBusinessSegmentsAxis = vhi_ComponentProductsMember
Waste Management |  |  |
Segment Reporting Information [Line Items] |  |  |
Total assets | 257.7 us-gaap_Assets / us-gaap_StatementBusinessSegmentsAxis = vhi_WasteManagementMember | 270.1 us-gaap_Assets / us-gaap_StatementBusinessSegmentsAxis = vhi_WasteManagementMember | 265.0 us-gaap_Assets / us-gaap_StatementBusinessSegmentsAxis = vhi_WasteManagementMember
Real Estate Management And Development |  |  |
Segment Reporting Information [Line Items] |  |  |
Total assets | 246.3 us-gaap_Assets / us-gaap_StatementBusinessSegmentsAxis = vhi_RealEstateManagementAndDevelopmentMember | 253.7 us-gaap_Assets / us-gaap_StatementBusinessSegmentsAxis = vhi_RealEstateManagementAndDevelopmentMember |
Joint venture accounted for by the equity method |  |  |
Segment Reporting Information [Line Items] |  |  |
Total assets |  |  | $ 16.2 us-gaap_Assets / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = us-gaap_CorporateJointVentureMember

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- Definition Sum of the carrying amounts as of the balance sheet date of all assets that are recognized. Assets are probable future economic benefits obtained or controlled by an entity as a result of past transactions or events. + 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 210.5-02.18) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 03 -Paragraph 12 -Article 7 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 18 -Article 5 + Details
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