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Long-Term Debt - Kronos Term Loans - Additional Information (Detail) - Kronos Worldwide, Inc. - Kronos International, Inc - 3.75% Senior Secured Notes due September 15, 2025 € in Millions, $ in Millions |  | 12 Months Ended |  |
--- | --- | --- | --- | ---
Sep. 13, 2017 USD ($) | Dec. 31, 2021 USD ($) | Dec. 31, 2020 USD ($) | Sep. 13, 2017 EUR (€) | Sep. 13, 2017 USD ($)
Debt Instrument [Line Items] |  |  |  |  |
Debt instrument principal amount |  |  |  | € 400 | $ 477.6
Debt instrument maturity date | Sep. 15, 2025 |  |  |  |
Debt instrument interest rate |  |  |  | 3.75% | 3.75%
Debt instrument, interest payment terms |  | bear interest at 3.75% per annum, |  |  |
Debt instrument, frequency of periodic payment of interest |  | semi-annually |  |  |
Debt Instrument, date of first required semi-annual payment | Mar. 15, 2018 |  |  |  |
Debt instrument redemption price percent if experiences certain specified change of control events | 101.00% |  |  |  |
Debt instrument, redemption, description |  | have a maturity date of September 15, 2025. Kronos may redeem the Senior Notes at redemption prices ranging from 102.813% of the principal amount, declining to 100% on or after September 15, 2023. If Kronos experiences certain specified change of control events, it would be required to make an offer to purchase the Senior Notes at 101% of the principal amount. Kronos would also be required to make an offer to purchase a specified portion of the Senior Notes at par value in the event that it generates a certain amount of net proceeds from the sale of assets outside the ordinary course of business, and such net proceeds are not otherwise used for specified purposes within a specified time period |  |  |
Maximum amount of other indebtedness default before triggering customary default provisions | $ 50.0 |  |  |  |
Unamortized debt issuance costs |  | $ 3.5 | $ 4.7 |  |
Collateral Pledged | Direct Domestic Subsidiary of KII and Guarantors |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Parent company ownership interest |  |  |  | 100.00% | 100.00%
Collateral Pledged | Foreign Subsidiary Directly Owned by KII or any Guarantor |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Parent company ownership interest |  |  |  | 65.00% | 65.00%
Non-voting Common Stock | Collateral Pledged | Foreign Subsidiary Directly Owned by KII or any Guarantor |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Parent company ownership interest |  |  |  | 100.00% | 100.00%
On or After September 15, 2020 |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Debt instrument, redemption price percentage | 102.813% |  |  |  |
On or After September 15, 2023 |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Debt instrument, redemption price percentage | 100.00% |  |  |  |

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