XML 80 R41.htm IDEA: XBRL DOCUMENT
v3.3.0.814

Organization and Basis of Presentation - Additional Information (Detail) - Contran - Director | 1 Months Ended | 9 Months Ended
--- | --- | ---
Feb. 28, 2014 | Sep. 30, 2015
Basis Of Presentation And Significant Accounting Policies [Line Items] |  |
Parent company ownership interest |  | 93.00%
Common stock, voting rights |  | The voting agreement expires in February 2017 (unless Ms. Lisa Simmons, Ms. Connelly and Ms. Annette Simmons otherwise mutually agree), and the ability of Ms. Lisa Simmons, Ms. Connelly, and Ms. Annette Simmons to each designate one member of the Contran board is dependent upon each of their continued beneficial ownership of at least 5% of the combined voting stock of Contran.
Voting agreement expiration date |  | 2017-02
Size of board of directors |  | 5
Minimum |  |
Basis Of Presentation And Significant Accounting Policies [Line Items] |  |
Minimum percentage of voting stock ownership required to designate a board member | 5.00% |

X
- Definition Description of voting rights of common stock. Includes eligibility to vote and votes per share owned. Include also, if any, unusual voting rights. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section 50 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=6928386&loc=d3e21475-112644 + Details
Name: | us-gaap_CommonStockVotingRights
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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 Basis of presentation and significant accounting policies. + References No definition available. + Details
Name: | vhi_BasisOfPresentationAndSignificantAccountingPoliciesLineItems
Namespace Prefix: | vhi_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Number of board of directors. + References No definition available. + Details
Name: | vhi_NumberOfBoardOfDirectors
Namespace Prefix: | vhi_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | duration

X
- Definition Expiration date of voting agreement among the voting stockholders of private parent company. + References No definition available. + Details
Name: | vhi_VotingAgreementExpirationDate
Namespace Prefix: | vhi_
Data Type: | xbrli:gYearMonthItemType
Balance Type: | na
Period Type: | duration

X
- Definition Voting stock ownership percentage of all classes of voting stock required to maintain the right to designate one board member under the voting agreement. + References No definition available. + Details
Name: | vhi_VotingStockOwnershipPercentageRequiredToDesignateBoardMemberUnderVotingAgreement
Namespace Prefix: | vhi_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | dei_LegalEntityAxis=vhi_ContranMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_RangeAxis=us-gaap_MinimumMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |