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v3.24.2.u1

Organization and basis of presentation - Additional Information (Detail) - USD ($) $ / shares in Units, $ in Millions | 3 Months Ended | 6 Months Ended |  |  |
--- | --- | --- | --- | --- | ---
Jun. 30, 2024 | Jun. 30, 2023 | Jun. 30, 2024 | Jun. 30, 2023 | Dec. 31, 2023 | Mar. 31, 2023 | Dec. 31, 2022
Organization and basis of presentation [Line Items] |  |  |  |  |  |  |
Deferred income taxes | $ 13.0 |  | $ 13.0 |  | $ 17.1 |  |
Retained earnings | 499.0 |  | 499.0 |  | 475.8 |  |
Income tax expense (benefit) | $ 7.9 | $ (6.8) | $ 12.3 | $ (12.0) |  |  |
Basic net loss per share | $ 0.70 | $ (0.11) | $ 0.97 | $ (0.31) |  |  |
Diluted net loss per share | $ 0.70 | $ (0.11) | $ 0.97 | $ (0.31) |  |  |
Restatement adjustment |  |  |  |  |  |  |
Organization and basis of presentation [Line Items] |  |  |  |  |  |  |
Deferred income taxes |  |  |  |  | $ (14.7) |  |
Retained earnings |  | $ 13.5 |  | $ 13.5 |  | $ 11.6 | $ 12.5
Income tax expense (benefit) |  | $ 1.9 |  | $ 1.0 |  |  |
Basic net loss per share |  | $ (0.07) |  | $ (0.04) |  |  |
Diluted net loss per share |  | $ (0.07) |  | $ (0.04) |  |  |
Contran | Valhi Incorporation |  |  |  |  |  |  |
Organization and basis of presentation [Line Items] |  |  |  |  |  |  |
Parent company ownership interest | 91.00% |  | 91.00% |  |  |  |

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