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Related Party Transactions - Additional Information (Detail) - USD ($) shares in Millions, $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2021 | Dec. 31, 2020 | Dec. 31, 2019
Contran | Intercorporate Services Agreements Fees |  |  |
Related Party Transaction [Line Items] |  |  |
Related party transaction | $ 41.0 | $ 41.3 | $ 43.9
Contran | Combined Information Technology Data Recovery Program |  |  |
Related Party Transaction [Line Items] |  |  |
Related party transaction | 0.3 | 0.3 | 0.2
Contran | Pledge Fee Received |  |  |
Related Party Transaction [Line Items] |  |  |
Revenue and other income from related party transactions | 1.5 | 1.4 | 1.9
Contran | Kronos Worldwide, Inc. | Sublease Agreement |  |  |
Related Party Transaction [Line Items] |  |  |
Payment for sublease rent and related ancillary services | $ 0.4 | 0.4 | 0.1
Contran | Kronos Worldwide, Inc. | Stock Pledged as Collateral |  |  |
Related Party Transaction [Line Items] |  |  |
Stock pledged as collateral | 16.7 |  |
Contran | Contran Credit Facility |  |  |
Related Party Transaction [Line Items] |  |  |
Interest on borrowings and unused commitment fees under credit facilities | $ 10.4 | 14.2 | 19.9
Contran and Other Affiliates |  |  |
Related Party Transaction [Line Items] |  |  |
Related party transaction cash received for insurance premium |  |  | 0.7
Related party transaction cash paid for insurance premium | 27.1 | 23.1 |
LPC |  |  |
Related Party Transaction [Line Items] |  |  |
Purchase of Ti02 from LPC | 188.6 | 167.8 | 176.2
Sales of feedstock ore to LPC | $ 85.4 | $ 84.2 | $ 84.1

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