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Long-Term Debt - Senior Secured Note - Additional Information (Detail) | 12 Months Ended | 3 Months Ended | 6 Months Ended | 1 Months Ended | 3 Months Ended | 6 Months Ended |  |
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Dec. 31, 2013 USD ($) | Dec. 31, 2012 USD ($) | Dec. 31, 2011 USD ($) | Jun. 30, 2012 Kronos Worldwide, Inc. USD ($) | Dec. 31, 2011 Kronos Worldwide, Inc. USD ($) | Jul. 20, 2012 Kronos Worldwide, Inc. 6.5% Senior Secured Notes | Mar. 31, 2011 Kronos Worldwide, Inc. 6.5% Senior Secured Notes USD ($) | Mar. 31, 2011 Kronos Worldwide, Inc. 6.5% Senior Secured Notes USD ($) | Dec. 31, 2011 Kronos Worldwide, Inc. 6.5% Senior Secured Notes USD ($) | Dec. 31, 2011 Kronos Worldwide, Inc. 6.5% Senior Secured Notes EUR (€) | Jun. 30, 2012 Kronos Worldwide, Inc. 6.5% Senior Secured Notes EUR (€) | Mar. 31, 2011 Kronos Worldwide, Inc. 6.5% Senior Secured Notes EUR (€)
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Principal amount of debt redeemed or repurchased |  |  |  |  |  |  |  |  |  | € 40,800,000 |  | € 80,000,000
Interest on promissory note and deferred payment |  |  |  |  |  |  |  |  |  |  |  | 6.50%
Principal amount of promissory note |  |  |  |  |  |  |  |  |  |  |  | 400,000,000
Percentage of loan issued to principal amount |  |  |  |  |  |  | 102.17% |  |  |  |  |
Aggregate redemption or repurchase price on principal amount |  |  |  |  |  |  | 115,700,000 |  | 57,600,000 | 40,600,000 |  |
Call premium |  |  |  |  |  |  | 2,500,000 |  |  |  |  |
Pre Tax Interest Charge | (8,900,000) | (7,200,000) | (3,100,000) | 7,200,000 | 200,000 |  |  | 3,300,000 |  |  |  |
Carrying amount of debt |  |  |  |  |  |  |  |  |  |  | € 279,200,000 |
Repayment of debt, percentage on principal amount |  |  |  |  |  | 1.01083% |  |  |  |  |  |

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- Definition Amount of long-term debt before deduction of unamortized discount or premium. Includes, but is not limited to, notes payable, bonds payable, commercial loans, mortgage loans, convertible debt, subordinated debt and other types of debt, with initial maturities beyond one year or the normal operating cycle, if longer. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 20 -Article 5 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 22 -Article 5 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.22) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 03 -Paragraph 16 -Article 9 + Details
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- Definition Face (par) amount of debt instrument at time of issuance. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 835 -SubTopic 30 -Section 45 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6451184&loc=d3e28551-108399 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 835 -SubTopic 30 -Section 55 -Paragraph 8 -URI http://asc.fasb.org/extlink&oid=6584090&loc=d3e28878-108400 + Details
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- Definition Contractual interest rate for funds borrowed, under the debt agreement. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 22 -Article 5 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.22(a)(1)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
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- Definition Percentage of principal amount of debt redeemed. + References No definition available. + Details
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- Definition Difference between the fair value of payments made and the carrying amount of debt which is extinguished prior to maturity. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3602-108585 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 470 -SubTopic 50 -Section 40 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6850294&loc=d3e12317-112629 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 470 -SubTopic 50 -Section 40 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=6850294&loc=d3e12355-112629 + Details
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- Definition The excess of the (1) fair value of consideration transferred to the holders of a security in excess of (2) the carrying amount of the security reported on the registrant's balance sheet, which will be deducted from net earnings to derive net earnings available to common shareholders. This amount is generally an adjustment considered in the computation of earnings per share. + References No definition available. + Details
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