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Accounts and Other Receivables, Net - Components of Accounts and Other Receivables (Detail) - USD ($) $ in Millions | Dec. 31, 2020 | Dec. 31, 2019
--- | --- | ---
Trade accounts receivable: |  |
VAT and other receivables | $ 27.2 | $ 31.2
Allowance for doubtful accounts | (1.9) | (1.2)
Total | 332.1 | 314.0
Trade Accounts Receivable | Kronos Worldwide, Inc. |  |
Trade accounts receivable: |  |
Accounts receivable | 294.8 | 270.5
Trade Accounts Receivable | CompX |  |
Trade accounts receivable: |  |
Accounts receivable | 10.8 | 11.9
Trade Accounts Receivable | BMI and LandWell |  |
Trade accounts receivable: |  |
Accounts receivable | $ 1.2 | $ 1.6

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