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Commitments and Contingencies - Future Minimum Payments under Noncancellable Operating Leases (Parenthetical) (Detail) (USD $) In Millions, unless otherwise specified	Dec. 31, 2014
Future Minimum Payments Under Non Cancelable Operating Leases With Initial Terms Of One Year Or More [Line Items]
Future minimum lease payments	$ 51.5us-gaap_OperatingLeasesFutureMinimumPaymentsDue
Leverkusen TiO2 production facility | Chemicals
Future Minimum Payments Under Non Cancelable Operating Leases With Initial Terms Of One Year Or More [Line Items]
Future minimum lease payments	$ 16.0us-gaap_OperatingLeasesFutureMinimumPaymentsDue / dei_EntityByLocationAxis = vhi_LeverkusenFacilityLeaseMember / us-gaap_StatementBusinessSegmentsAxis = vhi_ChemicalsMember

X

- Definition

Amount of required minimum rental payments for leases having an initial or remaining non-cancelable letter-terms in excess of one year.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 840

-SubTopic 20

-Section 50

-Paragraph 2

-Subparagraph (a)

-URI http://asc.fasb.org/extlink&oid=6453985&loc=d3e41502-112717



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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 840

-SubTopic 10

-Section 55

-Paragraph 40

-Subparagraph (Note 3)

-URI http://asc.fasb.org/extlink&oid=6584154&loc=d3e38371-112697

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

X

- Details

Name:	vhi_FutureMinimumPaymentsUnderNonCancelableOperatingLeasesWithInitialTermsOfOneYearOrMoreLineItems
Namespace Prefix:	vhi_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

X

- Details

Name:	dei_EntityByLocationAxis=vhi_LeverkusenFacilityLeaseMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: