Long-Term Debt - Revolving Credit Facility - Additional Information (Detail) (Kronos Worldwide, Inc.) In Millions, unless otherwise specified	12 Months Ended		12 Months Ended					1 Months Ended		12 Months Ended									12 Months Ended
	Dec. 31, 2013 Revolving North American credit facility USD ($)	Jun. 30, 2012 Revolving North American credit facility USD ($)	Dec. 31, 2013 Revolving North American credit facility Minimum LIBOR Option	Dec. 31, 2013 Revolving North American credit facility Minimum Base Rate Option	Dec. 31, 2013 Revolving North American credit facility Maximum LIBOR Option	Dec. 31, 2013 Revolving North American credit facility Maximum Base Rate Option	Dec. 31, 2013 Revolving European credit facility EUR (€)	Aug. 31, 2013 European Credit Facility USD ($)	Aug. 31, 2013 European Credit Facility EUR (€)	Dec. 31, 2013 European Credit Facility USD ($)	Dec. 31, 2013 European Credit Facility EUR (€)	Jan. 01, 2014 European Credit Facility Subsequent Event USD ($)	Jan. 01, 2014 European Credit Facility Subsequent Event EUR (€)	Dec. 31, 2013 Letter Of Credit Revolving North American credit facility USD ($)	Dec. 31, 2013 Canadian Subsidiary Revolving Borrowings Maximum Revolving North American credit facility USD ($)	Dec. 31, 2013 Canadian Letter Of Credit Loan Agreement USD ($)	Dec. 31, 2013 Canadian Letter Of Credit Loan Agreement CAD	Dec. 31, 2011 Canadian Letter Of Credit Loan Agreement CAD	Dec. 31, 2013 Canadian Loan Agreement USD ($)	Dec. 31, 2013 Canadian Loan Agreement CAD	Dec. 31, 2012 Canadian Loan Agreement CAD
Debt Instrument [Line Items]
Maximum borrowing capacity		$ 125.0					€ 120.0							$ 15.0	$ 25.0			10.0			7.1
Credit facility maturity date	June 2017
Debt instrument basis spread on variable rate			1.50%	0.50%	2.00%	1.00%	1.90%
Fixed charge coverage ratio, minimum value	1.0
Revolving credit facility, borrowings	162.1																		1.7	1.8
Repayment of credit facility	151.0							26.5	20.0
Percentage of average interest rate	2.69%							2.02%	2.02%
Percentage of average interest rate, during period	3.75%
Amount available for borrowing	89.1
Borrowings under credit facility during the period										12.80	10.00
Debt instrument										0
Percentage of borrowings available under credit facility										50.00%	50.00%	75.00%	75.00%
Amount available for Borrowing										82.8	60.0	124.1	90.0
Letters of credit outstanding																	7.4
Additional indebtedness																	35
Restricted Deposits																$ 7.9