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Noncontrolling Interest in Subsidiaries - Noncontrolling Interest in Subsidiaries (Detail) (USD $) In Millions, unless otherwise specified | Dec. 31, 2014 | Dec. 31, 2013
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Noncontrolling interest in net assets: |  |
Noncontrolling interest in subsidiaries | $ 336.3 us-gaap_MinorityInterest | $ 391.5 us-gaap_MinorityInterest
Kronos Worldwide, Inc. |  |
Noncontrolling interest in net assets: |  |
Noncontrolling interest in subsidiaries | 211.0 us-gaap_MinorityInterest / dei_LegalEntityAxis = vhi_KronosMember | 241.9 us-gaap_MinorityInterest / dei_LegalEntityAxis = vhi_KronosMember
NL |  |
Noncontrolling interest in net assets: |  |
Noncontrolling interest in subsidiaries | 54.4 us-gaap_MinorityInterest / dei_LegalEntityAxis = vhi_NlIndustriesIncMember | 74.5 us-gaap_MinorityInterest / dei_LegalEntityAxis = vhi_NlIndustriesIncMember
CompX |  |
Noncontrolling interest in net assets: |  |
Noncontrolling interest in subsidiaries | 14.4 us-gaap_MinorityInterest / dei_LegalEntityAxis = vhi_CompXMember | 13.6 us-gaap_MinorityInterest / dei_LegalEntityAxis = vhi_CompXMember
BMI |  |
Noncontrolling interest in net assets: |  |
Noncontrolling interest in subsidiaries | 31.7 us-gaap_MinorityInterest / dei_LegalEntityAxis = vhi_BasicManagementMember | 33.7 us-gaap_MinorityInterest / dei_LegalEntityAxis = vhi_BasicManagementMember
LandWell |  |
Noncontrolling interest in net assets: |  |
Noncontrolling interest in subsidiaries | $ 24.8 us-gaap_MinorityInterest / dei_LegalEntityAxis = vhi_LandwellMember | $ 27.8 us-gaap_MinorityInterest / dei_LegalEntityAxis = vhi_LandwellMember

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- Definition Total of all stockholders' equity (deficit) items, net of receivables from officers, directors, owners, and affiliates of the entity which is directly or indirectly attributable to that ownership interest in subsidiary equity which is not attributable to the parent (that is, noncontrolling interest, previously referred to as minority interest). + 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 210.5-02.31) -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 27 -Article 5 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 03 -Paragraph 20 -Article 7 + Details
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