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Long-Term Debt - Note Payable to Contran - Additional Information (Detail) (Kronos Worldwide, Inc., Contran, USD $) In Millions, unless otherwise specified | 1 Months Ended | 12 Months Ended
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Feb. 28, 2014 | Dec. 31, 2013
Kronos Worldwide, Inc. | Contran |  |
Debt Instrument [Line Items] |  |
Payment of principal amount | $ 170.0 |
Percentage of average interest rate, during period |  | 7.375%
Percentage of average interest rate |  | 7.375%

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