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

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The amount of debt discount that was originally recognized at the issuance of the instrument that has yet to be amortized.

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Difference between the fair value of payments made and the carrying amount of debt which is extinguished prior to maturity.

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The effective interest rate at the end of the reporting period.

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The cash inflow from a contractual arrangement with the lender, including letter of credit, standby letter of credit and revolving credit arrangements, under which borrowings can be made up to a specific amount at any point in time with maturities due beyond one year or the operating cycle, if longer.

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The cash inflow from a long-term borrowing made from related parties where one party can exercise control or significant influence over another party; including affiliates, owners or officers and their immediate families, pension trusts, and so forth. Alternate caption: Proceeds from Advances from Affiliates.

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The cash outflow for debt initially having maturity due after one year or beyond the normal operating cycle, if longer.

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The cash outflow to repay long-term debt that is wholly or partially secured by collateral. Excludes repayments of tax exempt secured debt.

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Carrying value as of the balance sheet date, including the current and noncurrent portions, of collateralized debt obligations (with maturities initially due after one year or beyond the operating cycle, if longer). Such obligations include mortgage loans, chattel loans, and any other borrowings secured by assets of the borrower.

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Long-Term Debt - Kronos Term Loan - Additional Information (Detail) (USD $) In Millions, unless otherwise specified	3 Months Ended	6 Months Ended				1 Months Ended	6 Months Ended	1 Months Ended	6 Months Ended	1 Months Ended
	Jun. 30, 2012	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2013 Kronos Worldwide, Inc.	Dec. 31, 2012 Kronos Worldwide, Inc.	Jul. 31, 2013 Kronos Worldwide, Inc. Revolving North American Credit Facility	Jun. 30, 2013 Kronos Worldwide, Inc. Revolving North American Credit Facility	Feb. 28, 2013 Kronos Worldwide, Inc. Term Loan	Jun. 30, 2013 Kronos Worldwide, Inc. Term Loan	Jul. 31, 2013 Kronos Worldwide, Inc. Term Loan Principal Prepayment	Feb. 28, 2013 Kronos Worldwide, Inc. Term Loan Principal Prepayment	Feb. 28, 2013 Kronos Worldwide, Inc. Term Loan Outstanding Balance Including Unamortized Discount
Debt Instrument [Line Items]
Payment of Principal Amount										$ 100	$ 290
Pre Tax Interest Charge	(7.2)	(6.6)	(7.2)								6.6
Cash used for payment of term loan										50	100
Borrowing from Contran for prepayment of term loan											190
Term loan maturity date								Jun. 30, 2018
Principal amount outstanding				98.6	384.5							100.0
Percentage of average interest rate									7.00%
Percentage of average interest rate, during period									6.80%
Unamortized Discount									1.4
Revolving credit facility, borrowings						$ 50.0	$ 0