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Related Party Transactions - Summary of Receivables from and Payables to Affiliates (Details) - USD ($) $ in Millions | Dec. 31, 2023 | Dec. 31, 2022
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Related Party Transaction [Line Items] |  |
Current receivables from affiliates | $ 17.3 | $ 2.7
Current payables to affiliates | 31.3 | 22.9
Noncurrent payable to affiliates | 18.6 | 33.5
Other Affiliates | Other payable |  |
Related Party Transaction [Line Items] |  |
Current payables to affiliates | 0.6 |
Other Affiliates | Other Receivable |  |
Related Party Transaction [Line Items] |  |
Current receivables from affiliates | 0.4 | 2.7
Louisiana Pigment Company, L.P. | Trade Items |  |
Related Party Transaction [Line Items] |  |
Current receivables from affiliates | 16.9 |
Current payables to affiliates | 19.9 | 17.1
Valhi | Income Tax Payable |  |
Related Party Transaction [Line Items] |  |
Current payables to affiliates | 10.8 | 5.8
Related Party [Member] |  |
Related Party Transaction [Line Items] |  |
Current payables to affiliates | 31.3 | 22.9
Noncurrent payable to affiliates | $ 18.6 | $ 33.5

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