Aggregate notional amount specified by the derivative(s). Expressed as an absolute value.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
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When the derivative or group of derivatives presented is a swap, the type of interest rate (fixed, variable, stepped, etc.) paid on the swap.

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Fair values as of the balance sheet date of the net amount of all assets and liabilities resulting from contracts that meet the criteria of being accounted for as derivative instruments.

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Fixed interest rate related to the interest rate derivative.

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No definition available.

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Floor rate on an interest rate derivative such as an interest rate floor or collar. If market rates falls below the floor rate, a payment or receipt is triggered on the contract.

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Date the entity entered into the derivative contract, in CCYY-MM-DD format.

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Date the derivative contract matures, in CCYY-MM-DD format.

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Description of the type of derivative instrument, such as a swap, forward, and option. Excludes the underlying risk of the instrument.

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The net gain (loss) recognized in earnings during the period due to the ineffectiveness on interest rate fair value hedges.

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Amount before tax of increase (decrease) in accumulated gain (loss) from derivative instruments designated and qualifying as the effective portion of cash flow hedges and an entity's share of an equity investee's increase (decrease) in deferred hedging gain (loss).

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Amount before tax of reclassification adjustments of other comprehensive income (loss).

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The market price or dollar value of a bond traded in open markets, reflecting any premium or discount to par value.

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The nominal value (par value) or dollar value of a bond paid to the holder at maturity.

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Contract termination fee paid.

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Derivative effective dates.

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Date the derivative contract notional amount begins to decline, in CCYY-MM-DD format.

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Notional amount of decline in the swap notional amount each quarter.

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Financial instrument at fair value.

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Financial Instruments - Additional Information (Detail) - Kronos Worldwide, Inc.	1 Months Ended	12 Months Ended
	Sep. 30, 2017 USD ($)	Dec. 31, 2018 USD ($)	Dec. 31, 2017 USD ($)	Dec. 31, 2016 USD ($)	Dec. 31, 2018 EUR (€)	Dec. 31, 2017 EUR (€)	Dec. 31, 2015 USD ($)
3.75% Senior Secured Notes due September 15, 2025 \| Kronos International, Inc
Financial Instrument At Fair Value [Line Items]
Estimated market price of the notes \| €					€ 900	€ 1,034
Principal amount of debt instrument \| €					€ 1,000	€ 1,000
Currency Forward Contracts
Financial Instrument At Fair Value [Line Items]
Currency forward contracts outstanding		$ 0
Interest Rate Swap \| Libor Rate
Financial Instrument At Fair Value [Line Items]
Derivative, type of instrument		pay-fixed/receive-variable interest rate swap
Interest rate swap, type of interest rate		fixed
Interest rate swap, fixed rate		2.016%			2.016%
Interest rate swap, floor rate		1.00%			1.00%
Interest rate swap, inception date		Aug. 31, 2015
Interest rate swap, effective date		Sep. 30, 2015
Notional amount currency forward contract							$ 344,800,000
Interest rate swap, notional amount decline each quarter		$ 875,000
Interest rate swap, notional amount decline commencing date		Dec. 31, 2015
Derivative maturity date		Feb. 29, 2020
Termination of interest rate swap contract paid	$ 3,300,000
Pretax unrealized loss recognized in other comprehensive income (loss) related to interest rate swap contract			$ 2,300,000	$ 3,100,000
Interest rate swap, gains or losses representing hedge ineffectiveness			0
Interest Rate Swap \| Libor Rate \| Interest Expense
Financial Instrument At Fair Value [Line Items]
Reclassified from accumulated other comprehensive loss in to earnings			$ 2,100,000	$ 3,500,000