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Investment in Kronos Worldwide, Inc. - Additional Information (Details) - USD ($) $ / shares in Units, shares in Millions, $ in Millions |  | 3 Months Ended |
--- | --- | --- | ---
Jul. 16, 2024 | Sep. 30, 2025 | Sep. 30, 2024 | Dec. 31, 2024
Kronos | Louisiana Pigment Company |  |  |  |
Schedule Of Equity Method Investments [Line Items] |  |  |  |
Percentage of voting interests acquired | 50.00% |  |  |
Business Combination non-cash gain |  | $ 4.6 |  |
Equity interest in acquiree percentage | 50.00% |  |  |
Payments to acquire businesses gross | $ 185.0 |  |  |
Business combination contingent consideration liability | $ 15.0 | $ 0.0 |  |
Non-cash gain before tax associated with remeasurement |  |  | $ 64.5 |
Estimated fair value of existing ownership |  |  | 178.2 |
Aggregate carrying value |  |  | $ 113.7 |
Kronos |  |  |  |
Schedule Of Equity Method Investments [Line Items] |  |  |  |
Number of shares owned |  | 35.2 |  | 35.2
Quoted market price per share |  | $ 5.74 |  | $ 9.75
Aggregate market value |  | $ 202.2 |  | $ 343.4

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