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Noncontrolling Interest in Subsidiaries - Noncontrolling Interest in Net Income (Loss) of Subsidiaries (Detail) (USD $) In Millions, unless otherwise specified | 12 Months Ended
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Dec. 31, 2013 | Dec. 31, 2012 | Dec. 31, 2011
Noncontrolling interest in net income (loss) of subsidiaries: |  |  |
Noncontrolling interest in net income (loss) of subsidiaries | $ (28.9) | $ 62.3 | $ 77.5
Kronos Worldwide, Inc. |  |  |
Noncontrolling interest in net income (loss) of subsidiaries: |  |  |
Noncontrolling interest in net income (loss) of subsidiaries | (20.3) | 42.6 | 62.6
NL |  |  |
Noncontrolling interest in net income (loss) of subsidiaries: |  |  |
Noncontrolling interest in net income (loss) of subsidiaries | (9.4) | 15.2 | 13.9
CompX |  |  |
Noncontrolling interest in net income (loss) of subsidiaries: |  |  |
Noncontrolling interest in net income (loss) of subsidiaries | $ 0.8 | $ 4.5 | $ 1.0

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- Definition Amount of Net Income (Loss) attributable to noncontrolling interest. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 810 -SubTopic 10 -Section 50 -Paragraph 1A -URI http://asc.fasb.org/extlink&oid=18733093&loc=SL4573702-111684 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 810 -SubTopic 10 -Section 55 -Paragraph 4J -URI http://asc.fasb.org/extlink&oid=31814832&loc=SL4591551-111686 + Details
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