Long-Term Debt - Revolving Credit Facility - Additional Information (Detail) - Kronos Worldwide, Inc. € in Millions, $ in Millions		12 Months Ended
	Apr. 20, 2021 USD ($)	Dec. 31, 2022 USD ($)	Dec. 31, 2022 EUR (€)
Global Revolver Credit Facility
Line Of Credit Facility [Line Items]
Line of credit maximum borrowing capacity	$ 225
Line of credit, maturity month and year	2026-04
Borrowings on credit facilities		$ 0
Repayment of credit facility		0
Amount available for borrowing		$ 211
Fixed charge coverage ratio, minimum value		100.00%
Global Revolver Credit Facility | Minimum | Variable Rate
Line Of Credit Facility [Line Items]
Interest rate on outstanding borrowings		1.50%
Global Revolver Credit Facility | Minimum | Base Rate Option
Line Of Credit Facility [Line Items]
Interest rate on outstanding borrowings		0.50%
Global Revolver Credit Facility | Maximum | Variable Rate
Line Of Credit Facility [Line Items]
Interest rate on outstanding borrowings		2.00%
Global Revolver Credit Facility | Maximum | Base Rate Option
Line Of Credit Facility [Line Items]
Interest rate on outstanding borrowings		2.00%
Canadian Subsidiary Revolving Borrowings Maximum
Line Of Credit Facility [Line Items]
Line of credit maximum borrowing capacity		$ 25
Belgian Subsidiary Revolving Borrowings Maximum
Line Of Credit Facility [Line Items]
Line of credit maximum borrowing capacity | €			€ 30
German Subsidiary Revolving Borrowings Maximum
Line Of Credit Facility [Line Items]
Line of credit maximum borrowing capacity | €			€ 60