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Income Taxes - Additional Information (Detail) - USD ($) $ in Millions |  | 3 Months Ended | 12 Months Ended
--- | --- | --- | ---
Mar. 27, 2020 | Mar. 31, 2020 | Dec. 31, 2017 | Dec. 31, 2022 | Dec. 31, 2021 | Dec. 31, 2020
Income Tax [Line Items] |  |  |  |  |  |
Deferred tax assets valuation allowance |  |  |  | $ 3.8 | $ 7.4 |
Transition tax |  |  | $ 74.5 |  |  |
Noncurrent payable to affiliate |  |  |  | $ 33.5 | 44.7 |
Income tax liability payable period |  |  |  | 8 years |  |
Due To Affiliate Noncurrent |  |  |  | $ 33.5 | 44.7 |
Current payable to affiliate |  |  |  | 22.9 | 18.2 |
Current cash tax benefit |  |  |  | (20.1) | (21.6) | $ (14.9)
Non-cash deferred income tax benefit |  |  |  | (1.6) | (11.0) | 1.0
Business interest income, adjusted taxable income | 30.00% |  |  |  |  |
CARES act of 2020, Business interest income, adjusted taxable income | 50.00% |  |  |  |  |
Cash tax benefit due to reversal of valuation allowance |  | $ 0.5 |  |  |  |
Increase decrease in valuation allowance |  |  |  |  | $ 2.8 | $ 2.8
Non-cash income tax benefit as a reduction of valuation allowance |  |  |  | 3.5 |  |
Estimated unrecognized tax benefits decrease amount for next twelve months |  |  |  | 1.0 |  |
Unrecognized tax benefits that would impact effective tax rate |  |  |  | 3.2 |  |
Valhi | Income Tax Payable |  |  |  |  |  |
Income Tax [Line Items] |  |  |  |  |  |
Noncurrent payable to affiliate |  |  |  | 33.5 |  |
Payable to affiliate |  |  |  | 44.7 |  |
Due To Affiliate Noncurrent |  |  |  | 33.5 |  |
Current payable to affiliate |  |  |  | 11.2 |  |
Corporate Purposes |  |  |  |  |  |
Income Tax [Line Items] |  |  |  |  |  |
Deferred tax assets valuation allowance |  |  |  | 0.0 |  |
D E | Corporate Purposes |  |  |  |  |  |
Income Tax [Line Items] |  |  |  |  |  |
Net operating loss carryforwards |  |  |  | 414.0 |  |
B E | Corporate Purposes |  |  |  |  |  |
Income Tax [Line Items] |  |  |  |  |  |
Net operating loss carryforwards |  |  |  | $ 13.0 |  |

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