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Financial instruments- Financial Instruments not Carried at Fair Value (Details) € in Thousands, $ in Millions | Dec. 31, 2024 EUR (€) | Dec. 31, 2024 USD ($) | Dec. 31, 2023 USD ($)
--- | --- | --- | ---
Reported Value Measurement |  |  |
Fair Value Balance Sheet Grouping Financial Statement Captions |  |  |
Cash, cash equivalents and restricted cash equivalents |  | $ 378.6 | $ 462.0
Estimate of Fair Value Measurement |  |  |
Fair Value Balance Sheet Grouping Financial Statement Captions |  |  |
Cash, cash equivalents and restricted cash equivalents |  | 378.6 | 462.0
Kronos Worldwide | Kronos International, Inc |  |  |
Fair Value Balance Sheet Grouping Financial Statement Captions |  |  |
Long term debt, carrying amount |  | 10.0 |
Long term debt, fair value |  | 10.0 |
Kronos Worldwide | 9.50% Senior Secured Notes due 2029 | Kronos International, Inc |  |  |
Fair Value Balance Sheet Grouping Financial Statement Captions |  |  |
Long term debt, carrying amount | € 351,174 | 365.4 |
Long term debt, fair value |  | 403.4 |
Kronos Worldwide | 3.75% Senior Secured Notes due 2025 | Kronos International, Inc |  |  |
Fair Value Balance Sheet Grouping Financial Statement Captions |  |  |
Long term debt, carrying amount |  | 78.3 | 440.9
Long term debt, fair value |  | 77.9 | 424.5
LandWell | Bank note payable |  |  |
Fair Value Balance Sheet Grouping Financial Statement Captions |  |  |
Long term debt, carrying amount |  | 11.4 | 12.2
Long term debt, fair value |  | $ 11.4 | $ 12.2

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