Related Party Transactions - Summary of Current Receivables from and Payables to Affiliates (Detail) - USD ($) $ in Millions |
Dec. 31, 2015 |
Dec. 31, 2014 |
|---|---|---|
| Related Party Transaction [Line Items] | ||
| Current receivable from affiliate | $ 2.5 | $ 18.0 |
| Current payables to affiliates | 19.5 | 19.9 |
| Louisiana Pigment Company, L.P. | Trade Items | ||
| Related Party Transaction [Line Items] | ||
| Current receivable from affiliate | 13.0 | |
| Current payables to affiliates | 19.4 | 19.9 |
| Valhi | Income Tax Receivable | ||
| Related Party Transaction [Line Items] | ||
| Current receivable from affiliate | 3.5 | |
| 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 | $ 2.5 | $ 1.5 |