Organization and Basis of Presentation - Additional Information (Detail)	Jun. 30, 2014
Organization And Basis Of Presentation [Line Items]
Equity method ownership percentage of Kronos Worldwide, Inc	30.00%
Minimum ownership required to designate board member	5.00%
Valhi, Inc
Organization And Basis Of Presentation [Line Items]
Equity method ownership percentage of Kronos Worldwide, Inc	83.00%
Contran Corporation
Organization And Basis Of Presentation [Line Items]
Equity method ownership percentage of Kronos Worldwide, Inc	94.00%