Accounts and Other Receivables, Net - Components of Accounts and Other Receivables (Detail) - USD ($) $ in Millions	Mar. 31, 2019	Dec. 31, 2018
Trade accounts receivable:
VAT and other receivables	$ 25.0	$ 32.7
Refundable income taxes	3.6	5.7
Accrued insurance recovery related to litigation	15.0	15.0
Allowance for doubtful accounts	(1.7)	(1.3)
Total	389.9	352.6
Trade Accounts Receivable | Kronos Worldwide, Inc.
Trade accounts receivable:
Accounts receivable	317.9	273.3
Trade Accounts Receivable | CompX
Trade accounts receivable:
Accounts receivable	15.4	12.2
Trade Accounts Receivable | BMI and LandWell
Trade accounts receivable:
Accounts receivable	1.3	1.5
Contran | Trade Items
Trade accounts receivable:
Receivable from affiliates	0.5	0.5
LPC | Trade Items
Trade accounts receivable:
Receivable from affiliates	10.2	10.2
Other | Trade Items
Trade accounts receivable:
Receivable from affiliates	$ 2.7	$ 2.8