Other Income, Net - Additional Information (Detail) $ in Millions	3 Months Ended
Mar. 31, 2021 USD ($)
Disclosure Other Income Net Additional Information Detail [Line Items]
Infrastructure reimbursement	$ 6.2
City Of Henderson
Disclosure Other Income Net Additional Information Detail [Line Items]
Infrastructure reimbursement	$ 6.2

Disclosure Other Income Net Additional Information Detail [Line Items]

No definition available.

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