Accounts and Other Receivables, Net - Components of Accounts and Other Receivables (Detail) (USD $) In Millions, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012
Trade accounts receivable:
VAT and other receivables	$ 32.7	$ 42.2
Allowance for doubtful accounts	(1.3)	(1.5)
Total	273.4	283.9
Kronos Worldwide, Inc.
Trade accounts receivable:
Accounts receivable	226.1	229.7
CompX
Trade accounts receivable:
Accounts receivable	8.7	8.7
WCS
Trade accounts receivable:
Accounts receivable	$ 7.2	$ 4.8