XML 65 R51.htm IDEA: XBRL DOCUMENT
v3.8.0.1

Business and Geographic Segments - Holding Percentage of Subsidiaries (Detail) | Dec. 31, 2017
--- | ---
Kronos Worldwide, Inc. |
Segment Reporting Information [Line Items] |
Parent company ownership interest | 50.00%
BMI |
Segment Reporting Information [Line Items] |
Parent company ownership interest | 63.00%
LandWell |
Segment Reporting Information [Line Items] |
Parent company ownership interest | 27.00%
Chemicals | Kronos Worldwide, Inc. |
Segment Reporting Information [Line Items] |
Controlling interest in subsidiary | 80.00%
Component Products | CompX |
Segment Reporting Information [Line Items] |
Parent company ownership interest | 87.00%
Real Estate Management And Development | BMI |
Segment Reporting Information [Line Items] |
Parent company ownership interest | 63.00%
Real Estate Management And Development | LandWell | Aggregate General And Limited Interests |
Segment Reporting Information [Line Items] |
Controlling interest in subsidiary | 77.00%

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
- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
Name: | us-gaap_SegmentReportingInformationLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Minority interest controlling percentage in subsidiary by parent. + References No definition available. + Details
Name: | vhi_MinorityInterestControllingPercentageInSubsidiaryByParent
Namespace Prefix: | vhi_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | instant

X
- Details
Name: | us-gaap_ConsolidatedEntitiesAxis=vhi_KronosMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_ConsolidatedEntitiesAxis=vhi_BasicManagementIncMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_ConsolidatedEntitiesAxis=vhi_LandWellMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_StatementBusinessSegmentsAxis=vhi_ChemicalsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_StatementBusinessSegmentsAxis=vhi_ComponentProductsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_ConsolidatedEntitiesAxis=vhi_CompXMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_StatementBusinessSegmentsAxis=vhi_RealEstateManagementAndDevelopmentMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_PartnerTypeOfPartnersCapitalAccountAxis=vhi_AggregateGeneralAndLimitedInterestsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |