Other Income, Net - Additional Information (Detail) - USD ($) $ in Millions	1 Months Ended	3 Months Ended
	Apr. 30, 2016	Mar. 31, 2016
Disclosure Other Income Net Additional Information Detail [Line Items]
Income received from settlement of business interruption insurance claim		$ 2.0
Other Income | Kronos Worldwide, Inc.
Disclosure Other Income Net Additional Information Detail [Line Items]
Income received from settlement of business interruption insurance claim		$ 2.0
Subsequent Event | Kronos Worldwide, Inc.
Disclosure Other Income Net Additional Information Detail [Line Items]
Income received from settlement of business interruption insurance claim	$ 1.4