XML 43 R41.htm IDEA: XBRL DOCUMENT v2.4.0.8

Organization and Basis of Presentation - Additional Information (Detail) (Contran)	Sep. 30, 2013
Contran
Basis Of Presentation And Significant Accounting Policies [Line Items]
Controlling interest in subsidiary	94.00%

X

- Definition

The parent entity's interest in net assets of the subsidiary, expressed as a percentage.

+ References

No definition available.

+ Details

Name:	us-gaap_MinorityInterestOwnershipPercentageByParent
Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

X

- Details

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