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Accounts and other receivables, net - Components of Accounts and Other Receivables (Detail) - USD ($) $ in Millions	Sep. 30, 2024	Dec. 31, 2023
Trade accounts receivable:
VAT and other receivables	$ 31.3	$ 33.4
Refundable income taxes	2.4	1.8
Allowance for doubtful accounts	(3.7)	(4.2)
Total	394.7	340.4
Trade Accounts Receivable | Kronos
Trade accounts receivable:
Trade Accounts receivable	348.6	273.6
Trade Accounts Receivable | CompX
Trade accounts receivable:
Trade Accounts receivable	14.5	17.1
Trade Accounts Receivable | BMI/LandWell
Trade accounts receivable:
Trade Accounts receivable	0.7	1.2
Louisiana Pigment Company, L.P. (LPC)
Trade accounts receivable:
Receivables from affiliates		16.9
Contran | Trade Items
Trade accounts receivable:
Receivables from affiliates	$ 0.9	0.2
Other | Trade Items
Trade accounts receivable:
Receivables from affiliates		$ 0.4

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Amount of allowance for credit loss on accounts receivable, classified as current.

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