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Noncontrolling interest in Subsidiaries - Schedule of Noncontrolling Interest in Net Income (Loss) of Subsidiaries (Detail) (USD $)
In Millions, unless otherwise specified
3 Months Ended
Mar. 31, 2015
Mar. 31, 2014
Noncontrolling interest in net income (loss) of subsidiaries:    
Noncontrolling interest in net income (loss) of subsidiaries $ 5.4us-gaap_NetIncomeLossAttributableToNoncontrollingInterest $ 3.8us-gaap_NetIncomeLossAttributableToNoncontrollingInterest
Kronos Worldwide, Inc.    
Noncontrolling interest in net income (loss) of subsidiaries:    
Noncontrolling interest in net income (loss) of subsidiaries 3.6us-gaap_NetIncomeLossAttributableToNoncontrollingInterest
/ dei_LegalEntityAxis
= vhi_KronosMember
2.7us-gaap_NetIncomeLossAttributableToNoncontrollingInterest
/ dei_LegalEntityAxis
= vhi_KronosMember
NL    
Noncontrolling interest in net income (loss) of subsidiaries:    
Noncontrolling interest in net income (loss) of subsidiaries 1.7us-gaap_NetIncomeLossAttributableToNoncontrollingInterest
/ dei_LegalEntityAxis
= vhi_NlIndustriesIncMember
0.6us-gaap_NetIncomeLossAttributableToNoncontrollingInterest
/ dei_LegalEntityAxis
= vhi_NlIndustriesIncMember
CompX    
Noncontrolling interest in net income (loss) of subsidiaries:    
Noncontrolling interest in net income (loss) of subsidiaries 0.3us-gaap_NetIncomeLossAttributableToNoncontrollingInterest
/ dei_LegalEntityAxis
= vhi_CompXMember
0.3us-gaap_NetIncomeLossAttributableToNoncontrollingInterest
/ dei_LegalEntityAxis
= vhi_CompXMember
BMI    
Noncontrolling interest in net income (loss) of subsidiaries:    
Noncontrolling interest in net income (loss) of subsidiaries   0.1us-gaap_NetIncomeLossAttributableToNoncontrollingInterest
/ dei_LegalEntityAxis
= vhi_BasicManagementMember
LandWell    
Noncontrolling interest in net income (loss) of subsidiaries:    
Noncontrolling interest in net income (loss) of subsidiaries $ (0.2)us-gaap_NetIncomeLossAttributableToNoncontrollingInterest
/ dei_LegalEntityAxis
= vhi_LandwellMember
$ 0.1us-gaap_NetIncomeLossAttributableToNoncontrollingInterest
/ dei_LegalEntityAxis
= vhi_LandwellMember