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Income taxes - Additional Information (Detail) - USD ($) | 3 Months Ended | 12 Months Ended
--- | --- | ---
Dec. 31, 2017 | Dec. 31, 2023 | Dec. 31, 2022 | Dec. 31, 2021 | Dec. 31, 2018
Income Taxes Disclosure [Line Items] |  |  |  |  |
Nondeductible Portion of Interest Carryforwards |  | $ 14,700,000 | $ 12,500,000 |  |
Unpaid Transition Tax |  | $ 33,300,000 |  |  |
Transition Tax, Number Of Payments |  | 2 |  |  |
Transition Tax, due in 2024 |  | $ 14,800,000 |  |  |
Transition Tax, due in 2025 |  | 18,500,000 |  |  |
Income tax expense (benefit) |  | (22,400,000) | 33,800,000 | $ 60,100,000 |
Deferred income taxes |  | $ 67,000,000.0 | 40,500,000 |  |
Period For Which Opertaing Loss Carryforward is Utilized |  | 3 years |  |  |
Business interest income, adjusted taxable income |  | 30.00% |  |  |
Current income taxes expense (benefit) |  | $ 26,100,000 | 36,400,000 | 51,200,000 |
Deferred income taxes expense (benefit) |  | (48,500,000) | (2,600,000) | 8,900,000 |
Deferred income taxes |  | 31,800,000 | 63,500,000 |  |
Unrecognized tax benefits impact on effective tax rate |  | 2,800,000 |  |  |
Accrued interest and penalties during the period |  | 0 | 200,000 | 700,000 |
Accrued interest and penalties end of the period |  | 0 | 100,000 |  |
Contran |  |  |  |  |
Income Taxes Disclosure [Line Items] |  |  |  |  |
Income taxes payable current |  | 10,200,000 | 5,800,000 |  |
Chemicals |  |  |  |  |
Income Taxes Disclosure [Line Items] |  |  |  |  |
Deferred income taxes expense (benefit) |  | $ 2,200,000 |  |  |
Canada |  |  |  |  |
Income Taxes Disclosure [Line Items] |  |  |  |  |
Operating Loss Carryforwards, Expiration Period |  | 20 years |  |  |
European Subsidiaries | Chemicals | Transition Tax |  |  |  |  |
Income Taxes Disclosure [Line Items] |  |  |  |  |
Current income tax expense provisional pursuant to transition tax | $ 74,100,000 |  |  |  |
Income tax liability payable period |  |  |  |  | 8 years
Corporate Tax Purposes | Germany |  |  |  |  |
Income Taxes Disclosure [Line Items] |  |  |  |  |
Net operating loss carryforwards |  | $ 75,800,000 |  |  |
Net operating loss carryforwards |  | 478,700,000 |  |  |
Corporate Tax Purposes | Belgium |  |  |  |  |
Income Taxes Disclosure [Line Items] |  |  |  |  |
Net operating loss carryforwards |  | 11,800,000 |  |  |
Net operating loss carryforwards |  | 47,000,000.0 |  |  |
Corporate Tax Purposes | Canada |  |  |  |  |
Income Taxes Disclosure [Line Items] |  |  |  |  |
Net operating loss carryforwards |  | 4,700,000 |  |  |
Net operating loss carryforwards |  | 31,500,000 |  |  |
Trade Tax Purposes | Germany |  |  |  |  |
Income Taxes Disclosure [Line Items] |  |  |  |  |
Net operating loss carryforwards |  | 5,900,000 |  |  |
Net operating loss carryforwards |  | 54,500,000 |  |  |
Provincial Tax Purposes | Canada |  |  |  |  |
Income Taxes Disclosure [Line Items] |  |  |  |  |
Net operating loss carryforwards |  | 4,000,000.0 |  |  |
Net operating loss carryforwards |  | 34,900,000 |  |  |
Direct Investment in Subsidiary | Kronos |  |  |  |  |
Income Taxes Disclosure [Line Items] |  |  |  |  |
Deferred income taxes expense (benefit) |  | 6,400,000 | $ (1,200,000) | $ 5,000,000.0 |
Deferred income taxes |  | 47,400,000 |  |  |
Direct Investment in Subsidiary | Kronos | Maximum [Member] |  |  |  |  |
Income Taxes Disclosure [Line Items] |  |  |  |  |
Deferred income taxes |  | $ 153,600,000 |  |  |

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