Long-Term Debt - Revolving Credit Facility - Additional Information (Detail) - Kronos Worldwide, Inc.	1 Months Ended	12 Months Ended
	Jan. 31, 2017	Dec. 31, 2016 USD ($)	Dec. 31, 2016 EUR (€)	Dec. 31, 2015 USD ($)	Dec. 31, 2016 EUR (€)	Jun. 30, 2012 USD ($)
Foreign Line of Credit | Europe
Line Of Credit Facility [Line Items]
Maximum borrowing capacity | €					€ 120,000,000
Line of credit maturity, description		September 2017	September 2017
Debt instrument basis spread on variable rate		1.90%	1.90%
Amount available for borrowing		$ 58,500,000			€ 55,800,000
Revolving credit facility, borrowings (repayments) | €			€ 0
Outstanding borrowings under revolving credit facility		$ 0
Percentage of borrowings available under credit facility		47.00%			47.00%
Revolving North American Credit Facility
Line Of Credit Facility [Line Items]
Maximum borrowing capacity						$ 125,000,000
Fixed charge coverage ratio, minimum value		110.00%	110.00%
Revolving credit facility, borrowings		$ 266,200,000		$ 0
Repayment of credit facility		266,200,000		$ 0
Amount available for borrowing		$ 74,800,000
Revolving North American Credit Facility | Subsequent Event
Line Of Credit Facility [Line Items]
Line of credit maturity, description	As amended in January 2017, the facility matures the earlier of (i) January 30, 2022 or (ii) 90 days prior to the maturity date of our term loan (or the maturity date of any new term loan constituting a permitted refinancing of the existing term loan). Based on February 2020 maturity date of our existing term loan, the maturity date of the North American credit facility is currently November 2019.
Revolving North American Credit Facility | Subsequent Event | Maturity Date Option 1
Line Of Credit Facility [Line Items]
Line of credit, maturity date	Jan. 30, 2022
Revolving North American Credit Facility | Subsequent Event | Maturity Date Option 2
Line Of Credit Facility [Line Items]
Maturity date of term loan	90 days
Line of credit maturity	2019-11
Revolving North American Credit Facility | Minimum | Variable Rate
Line Of Credit Facility [Line Items]
Debt instrument basis spread on variable rate		1.50%	1.50%
Revolving North American Credit Facility | Minimum | Base Rate Option
Line Of Credit Facility [Line Items]
Debt instrument basis spread on variable rate		0.50%	0.50%
Revolving North American Credit Facility | Maximum | Variable Rate
Line Of Credit Facility [Line Items]
Debt instrument basis spread on variable rate		2.00%	2.00%
Revolving North American Credit Facility | Maximum | Base Rate Option
Line Of Credit Facility [Line Items]
Debt instrument basis spread on variable rate		1.00%	1.00%
Letter Of Credit | Revolving North American Credit Facility
Line Of Credit Facility [Line Items]
Maximum borrowing capacity		$ 15,000,000
Canadian Subsidiary Revolving Borrowings Maximum | Revolving North American Credit Facility
Line Of Credit Facility [Line Items]
Maximum borrowing capacity		$ 25,000,000