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 |