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Long-Term Debt - Kronos Term Loan - Additional Information (Detail) (Kronos Worldwide, Inc., Notes Payable, Other Payables, 2014 Term Loan, USD $) In Millions, unless otherwise specified | 3 Months Ended
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Mar. 31, 2015
Kronos Worldwide, Inc. | Notes Payable, Other Payables | 2014 Term Loan |
Debt Instrument [Line Items] |
Percentage of average interest rate, during period | 4.75%us-gaap_DebtInstrumentInterestRateDuringPeriod / us-gaap_DebtInstrumentAxis = vhi_TwentyFourteenTermLoanMember / dei_LegalEntityAxis = vhi_KronosMember / us-gaap_LongtermDebtTypeAxis = us-gaap_NotesPayableOtherPayablesMember
Debt instrument, Interest rate at period end | 4.75%us-gaap_DebtInstrumentInterestRateEffectivePercentage / us-gaap_DebtInstrumentAxis = vhi_TwentyFourteenTermLoanMember / dei_LegalEntityAxis = vhi_KronosMember / us-gaap_LongtermDebtTypeAxis = us-gaap_NotesPayableOtherPayablesMember
Unamortized discount balance | $ 1.4 us-gaap_DebtInstrumentUnamortizedDiscount / us-gaap_DebtInstrumentAxis = vhi_TwentyFourteenTermLoanMember / dei_LegalEntityAxis = vhi_KronosMember / us-gaap_LongtermDebtTypeAxis = us-gaap_NotesPayableOtherPayablesMember
Quarterly principal repayments | $ 0.9 us-gaap_DebtInstrumentPeriodicPaymentPrincipal / us-gaap_DebtInstrumentAxis = vhi_TwentyFourteenTermLoanMember / dei_LegalEntityAxis = vhi_KronosMember / us-gaap_LongtermDebtTypeAxis = us-gaap_NotesPayableOtherPayablesMember

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- Definition The average effective interest rate during the reporting period. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 835 -SubTopic 30 -Section 45 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6451184&loc=d3e28551-108399 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 22 -Article 5 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.22(a)(1)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
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Balance Type: | na
Period Type: | duration

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- Definition Effective interest rate for the funds borrowed under the debt agreement considering interest compounding and original issue discount or premium. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 835 -SubTopic 30 -Section 45 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6451184&loc=d3e28551-108399 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 22 -Article 5 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.22(a)(1)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
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Balance Type: | na
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- Details
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Period Type: | duration

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- Definition Amount of the required periodic payments applied to principal. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.22) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 22 -Article 5 + Details
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Balance Type: | debit
Period Type: | duration

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- Definition The amount of debt discount that was originally recognized at the issuance of the instrument that has yet to be amortized. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 835 -SubTopic 30 -Section 45 -Paragraph 1A -URI http://asc.fasb.org/extlink&oid=6451184&loc=d3e28541-108399 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 835 -SubTopic 30 -Section 55 -Paragraph 8 -URI http://asc.fasb.org/extlink&oid=34725769&loc=d3e28878-108400 + Details
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Balance Type: | debit
Period Type: | instant