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Noncontrolling interest in Subsidiaries - Schedule of Noncontrolling Interest in Net Income (Loss) of Subsidiaries (Detail) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Noncontrolling interest in net income (loss) of subsidiaries:
Noncontrolling interest in net income (loss) of subsidiaries	$ 25.7us-gaap_NetIncomeLossAttributableToNoncontrollingInterest	$ (28.9)us-gaap_NetIncomeLossAttributableToNoncontrollingInterest	$ 62.3us-gaap_NetIncomeLossAttributableToNoncontrollingInterest
Kronos Worldwide, Inc.
Noncontrolling interest in net income (loss) of subsidiaries:
Noncontrolling interest in net income (loss) of subsidiaries	19.2us-gaap_NetIncomeLossAttributableToNoncontrollingInterest / dei_LegalEntityAxis = vhi_KronosMember	(20.3)us-gaap_NetIncomeLossAttributableToNoncontrollingInterest / dei_LegalEntityAxis = vhi_KronosMember	42.6us-gaap_NetIncomeLossAttributableToNoncontrollingInterest / dei_LegalEntityAxis = vhi_KronosMember
NL
Noncontrolling interest in net income (loss) of subsidiaries:
Noncontrolling interest in net income (loss) of subsidiaries	4.8us-gaap_NetIncomeLossAttributableToNoncontrollingInterest / dei_LegalEntityAxis = vhi_NlIndustriesIncMember	(9.4)us-gaap_NetIncomeLossAttributableToNoncontrollingInterest / dei_LegalEntityAxis = vhi_NlIndustriesIncMember	15.2us-gaap_NetIncomeLossAttributableToNoncontrollingInterest / dei_LegalEntityAxis = vhi_NlIndustriesIncMember
CompX
Noncontrolling interest in net income (loss) of subsidiaries:
Noncontrolling interest in net income (loss) of subsidiaries	1.1us-gaap_NetIncomeLossAttributableToNoncontrollingInterest / dei_LegalEntityAxis = vhi_CompXMember	0.8us-gaap_NetIncomeLossAttributableToNoncontrollingInterest / dei_LegalEntityAxis = vhi_CompXMember	4.5us-gaap_NetIncomeLossAttributableToNoncontrollingInterest / dei_LegalEntityAxis = vhi_CompXMember
BMI
Noncontrolling interest in net income (loss) of subsidiaries:
Noncontrolling interest in net income (loss) of subsidiaries	0.3us-gaap_NetIncomeLossAttributableToNoncontrollingInterest / dei_LegalEntityAxis = vhi_BasicManagementMember
LandWell
Noncontrolling interest in net income (loss) of subsidiaries:
Noncontrolling interest in net income (loss) of subsidiaries	$ 0.3us-gaap_NetIncomeLossAttributableToNoncontrollingInterest / dei_LegalEntityAxis = vhi_LandwellMember

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Amount of Net Income (Loss) attributable to noncontrolling interest.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 810

-SubTopic 10

-Section 50

-Paragraph 1A

-URI http://asc.fasb.org/extlink&oid=18733093&loc=SL4573702-111684



Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 810

-SubTopic 10

-Section 55

-Paragraph 4J

-URI http://asc.fasb.org/extlink&oid=35736750&loc=SL4591551-111686

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