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Related Party Transactions - Summary of Current Receivables from and Payables to Affiliates (Detail) - USD ($)
$ in Millions
Dec. 31, 2016
Dec. 31, 2015
Related Party Transaction [Line Items]    
Current receivable from affiliate $ 3.5 $ 2.5
Current payables to affiliates 14.7 19.5
Valhi | Income Tax Receivable    
Related Party Transaction [Line Items]    
Current receivable from affiliate 0.7  
Valhi | Income Tax Payable    
Related Party Transaction [Line Items]    
Current payables to affiliates   0.1
Other Affiliates | Other Receivable    
Related Party Transaction [Line Items]    
Current receivable from affiliate 2.8 2.5
Louisiana Pigment Company, L.P. | Trade Items    
Related Party Transaction [Line Items]    
Current payables to affiliates $ 14.7 $ 19.4