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v3.25.0.1

Long-term debt - Revolving Credit Facility - Additional Information (Details) € in Millions, $ in Millions |  | 12 Months Ended |  |  |
--- | --- | --- | --- | --- | ---
Jul. 17, 2024 USD ($) | Dec. 31, 2024 USD ($) | Dec. 31, 2023 USD ($) | Jul. 30, 2024 USD ($) | Jul. 17, 2024 EUR (€) | Jul. 16, 2024 USD ($)
Line Of Credit Facility [Line Items] |  |  |  |  |  |
Borrowings on credit facilities |  | $ 158.6 |  |  |  |
Kronos Worldwide | Global Revolver Credit Facility |  |  |  |  |  |
Line Of Credit Facility [Line Items] |  |  |  |  |  |
Line of credit maximum borrowing capacity | $ 300.0 |  |  | $ 300.0 |  | $ 225.0
Fixed charge coverage ratio, minimum value |  | 1.00% |  |  |  |
Borrowings on credit facilities |  | $ 157.8 | $ 0.0 |  |  |
Repayment of credit facility |  | $ 147.8 | $ 0.0 |  |  |
Debt instrument, Interest rate during period |  | 7.21% |  |  |  |
Debt instrument, Interest rate at period end |  | 6.25% |  |  |  |
Borrowing base |  | $ 278.0 |  |  |  |
Kronos Worldwide | Global Revolver Credit Facility | Non Base Rate |  |  |  |  |  |
Line Of Credit Facility [Line Items] |  |  |  |  |  |
Interest floor rate | 0.25% |  |  |  |  |
Kronos Worldwide | Global Revolver Credit Facility | Minimum | Base rate |  |  |  |  |  |
Line Of Credit Facility [Line Items] |  |  |  |  |  |
Interest rate spread | 0.50% |  |  |  |  |
Kronos Worldwide | Global Revolver Credit Facility | Minimum | Non Base Rate |  |  |  |  |  |
Line Of Credit Facility [Line Items] |  |  |  |  |  |
Interest rate spread | 1.50% |  |  |  |  |
Kronos Worldwide | Global Revolver Credit Facility | Maximum | Base rate |  |  |  |  |  |
Line Of Credit Facility [Line Items] |  |  |  |  |  |
Interest rate spread | 2.00% |  |  |  |  |
Kronos Worldwide | Global Revolver Credit Facility | Maximum | Non Base Rate |  |  |  |  |  |
Line Of Credit Facility [Line Items] |  |  |  |  |  |
Interest rate spread | 2.00% |  |  |  |  |
Kronos Worldwide | Belgian Subsidiary Revolving Borrowings Maximum | Global Revolver |  |  |  |  |  |
Line Of Credit Facility [Line Items] |  |  |  |  |  |
Line of credit maximum borrowing capacity | € |  |  |  |  | € 30 |
Kronos Worldwide | German Subsidiary Revolving Borrowings Maximum | Global Revolver |  |  |  |  |  |
Line Of Credit Facility [Line Items] |  |  |  |  |  |
Line of credit maximum borrowing capacity | € |  |  |  |  | € 60 |
Kronos Worldwide | Contran Credit Facility | Global Revolver |  |  |  |  |  |
Line Of Credit Facility [Line Items] |  |  |  |  |  |
Line of credit maximum borrowing capacity | $ 35.0 |  |  |  |  |

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