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Long-Term Debt - Senior Secured Notes - Additional Information (Detail) € in Millions, $ in Millions	6 Months Ended
	Jun. 30, 2019 USD ($)	Jun. 30, 2019 EUR (€)	Dec. 31, 2018 USD ($)
Debt Instrument [Line Items]
Aggregate principal amount outstanding	$ 449.7		$ 452.4
Kronos International, Inc | 3.75% Senior Secured Notes due September 15, 2025
Debt Instrument [Line Items]
Aggregate principal amount outstanding	$ 449.7	€ 400	$ 452.4
Debt instrument interest rate	3.75%	3.75%
Unamortized debt issuance costs	$ 5.8
Debt instrument maturity date	Sep. 15, 2025

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Contractual interest rate for funds borrowed, under the debt agreement.

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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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Date when the debt instrument is scheduled to be fully repaid, in CCYY-MM-DD format.

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Amount, after accumulated amortization, of debt issuance costs. Includes, but is not limited to, legal, accounting, underwriting, printing, and registration costs.

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Including the current and noncurrent portions, carrying value as of the balance sheet date of Notes with the highest claim on the assets of the issuer in case of bankruptcy or liquidation (with maturities initially due after one year or beyond the operating cycle if longer). Senior note holders are paid off in full before any payments are made to junior note holders.

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