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Noncontrolling interest in Subsidiaries - Schedule of Noncontrolling Interest in Net Income (Loss) of Subsidiaries (Detail) - USD ($) $ in Millions | 3 Months Ended
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Mar. 31, 2016 | Mar. 31, 2015
Noncontrolling interest in net income (loss) of subsidiaries: |  |
Noncontrolling interest in net income (loss) of subsidiaries | $ (2.5) | $ 5.4
Kronos Worldwide, Inc. |  |
Noncontrolling interest in net income (loss) of subsidiaries: |  |
Noncontrolling interest in net income (loss) of subsidiaries | (0.8) | 3.6
NL Industries |  |
Noncontrolling interest in net income (loss) of subsidiaries: |  |
Noncontrolling interest in net income (loss) of subsidiaries | (0.4) | 1.7
CompX International |  |
Noncontrolling interest in net income (loss) of subsidiaries: |  |
Noncontrolling interest in net income (loss) of subsidiaries | 0.3 | 0.3
BMI |  |
Noncontrolling interest in net income (loss) of subsidiaries: |  |
Noncontrolling interest in net income (loss) of subsidiaries | (1.4) |
LandWell |  |
Noncontrolling interest in net income (loss) of subsidiaries: |  |
Noncontrolling interest in net income (loss) of subsidiaries | $ (0.2) | $ (0.2)

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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 55 -Paragraph 4J -URI http://asc.fasb.org/extlink&oid=35736750&loc=SL4591551-111686 Reference 2: 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 + Details
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