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Income Taxes - Additional Information (Detail) In Millions, unless otherwise specified | 3 Months Ended |
--- | --- | ---
Mar. 31, 2014 USD ($) | Mar. 31, 2014 Net of noncontrolling interest USD ($) | Mar. 31, 2014 Proposed adjustment to certain foreign tax liabilities USD ($) | Mar. 31, 2014 Kronos Worldwide, Inc. Bank Of Montreal CAD
Income Taxes Disclosure [Line Items] |  |  |  |
Letter of credit collateralized |  |  |  | 7.9
Potential cash tax liability full amount for the proposed adjustment |  |  | 15.2 |
Unrecognized tax benefits | 13.0 |  |  |
Provision for income taxes related to previous periods | $ 1.0 | $ 0.9 |  |

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- Definition Amount of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations attributable to revisions of previously reported income tax expense (benefit). + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 12 -URI http://asc.fasb.org/extlink&oid=6907707&loc=d3e32687-109319 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 13 -URI http://asc.fasb.org/extlink&oid=6907707&loc=d3e32698-109319 + Details
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- Definition The amount of the unrecognized tax benefit of a position taken for which it is reasonably possible that the total amount thereof will significantly increase or decrease within twelve months of the balance sheet date. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 15 -Subparagraph (d) -URI http://asc.fasb.org/extlink&oid=6907707&loc=d3e32718-109319 + Details
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- Definition Tax reassessment resulting in potential cash tax liability maximum. + References No definition available. + Details
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