Long-Term Debt - Senior Secured Note - Additional Information (Detail)	12 Months Ended			3 Months Ended	6 Months Ended	1 Months Ended		3 Months Ended	6 Months Ended
	Dec. 31, 2013 USD ($)	Dec. 31, 2012 USD ($)	Dec. 31, 2011 USD ($)	Jun. 30, 2012 Kronos Worldwide, Inc. USD ($)	Dec. 31, 2011 Kronos Worldwide, Inc. USD ($)	Jul. 20, 2012 Kronos Worldwide, Inc. 6.5% Senior Secured Notes	Mar. 31, 2011 Kronos Worldwide, Inc. 6.5% Senior Secured Notes USD ($)	Mar. 31, 2011 Kronos Worldwide, Inc. 6.5% Senior Secured Notes USD ($)	Dec. 31, 2011 Kronos Worldwide, Inc. 6.5% Senior Secured Notes USD ($)	Dec. 31, 2011 Kronos Worldwide, Inc. 6.5% Senior Secured Notes EUR (€)	Jun. 30, 2012 Kronos Worldwide, Inc. 6.5% Senior Secured Notes EUR (€)	Mar. 31, 2011 Kronos Worldwide, Inc. 6.5% Senior Secured Notes EUR (€)
Debt Instrument [Line Items]
Principal amount of debt redeemed or repurchased										€ 40,800,000		€ 80,000,000
Interest on promissory note and deferred payment												6.50%
Principal amount of promissory note												400,000,000
Percentage of loan issued to principal amount							102.17%
Aggregate redemption or repurchase price on principal amount							115,700,000		57,600,000	40,600,000
Call premium							2,500,000
Pre Tax Interest Charge	(8,900,000)	(7,200,000)	(3,100,000)	7,200,000	200,000			3,300,000
Carrying amount of debt											€ 279,200,000
Repayment of debt, percentage on principal amount						1.01083%