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Accounts and Other Receivables, Net - Accounts and Other Receivables, Net (Detail) - USD ($) $ in Millions | Sep. 30, 2021 | Dec. 31, 2020
--- | --- | ---
Accounts Notes And Loans Receivable [Line Items] |  |
Allowance for doubtful accounts | $ (2.0) | $ (1.9)
Total | 384.0 | 323.0
Trade receivables |  |
Accounts Notes And Loans Receivable [Line Items] |  |
Accounts and other receivables | 346.6 | 294.8
Recoverable VAT and other receivables |  |
Accounts Notes And Loans Receivable [Line Items] |  |
Accounts and other receivables | 19.9 | 21.3
Other |  |
Accounts Notes And Loans Receivable [Line Items] |  |
Receivables from affiliates | 2.4 | 3.5
Refundable income taxes |  |
Accounts Notes And Loans Receivable [Line Items] |  |
Refundable income taxes | 3.7 | $ 5.3
Louisiana Pigment Company, L.P. ("LPC'') |  |
Accounts Notes And Loans Receivable [Line Items] |  |
Receivables from affiliates | $ 13.4 |

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