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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
Noncontrolling interest in net assets:
Noncontrolling interest in subsidiaries	$ 336.3us-gaap_MinorityInterest	$ 391.5us-gaap_MinorityInterest
Kronos Worldwide, Inc.
Noncontrolling interest in net assets:
Noncontrolling interest in subsidiaries	211.0us-gaap_MinorityInterest / dei_LegalEntityAxis = vhi_KronosMember	241.9us-gaap_MinorityInterest / dei_LegalEntityAxis = vhi_KronosMember
NL
Noncontrolling interest in net assets:
Noncontrolling interest in subsidiaries	54.4us-gaap_MinorityInterest / dei_LegalEntityAxis = vhi_NlIndustriesIncMember	74.5us-gaap_MinorityInterest / dei_LegalEntityAxis = vhi_NlIndustriesIncMember
CompX
Noncontrolling interest in net assets:
Noncontrolling interest in subsidiaries	14.4us-gaap_MinorityInterest / dei_LegalEntityAxis = vhi_CompXMember	13.6us-gaap_MinorityInterest / dei_LegalEntityAxis = vhi_CompXMember
BMI
Noncontrolling interest in net assets:
Noncontrolling interest in subsidiaries	31.7us-gaap_MinorityInterest / dei_LegalEntityAxis = vhi_BasicManagementMember	33.7us-gaap_MinorityInterest / dei_LegalEntityAxis = vhi_BasicManagementMember
LandWell
Noncontrolling interest in net assets:
Noncontrolling interest in subsidiaries	$ 24.8us-gaap_MinorityInterest / dei_LegalEntityAxis = vhi_LandwellMember	$ 27.8us-gaap_MinorityInterest / dei_LegalEntityAxis = vhi_LandwellMember

X

- 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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- Details

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- Details

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- Details

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- Details

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- Details

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- Details

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