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Other Income, Net - Additional Information (Detail) - USD ($) $ in Millions | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2020 | Mar. 31, 2020 | Sep. 30, 2019 | Sep. 30, 2020 | Sep. 30, 2019
Disclosure Other Income Net Additional Information Detail [Line Items] |  |  |  |  |
Insurance recoveries |  |  | $ 0.2 | $ 1.6 | $ 5.2
Net proceeds |  |  |  |  | 4.8
Infrastructure reimbursement |  |  |  | 19.6 | 9.2
NL |  |  |  |  |
Disclosure Other Income Net Additional Information Detail [Line Items] |  |  |  |  |
Insurance recoveries |  |  |  |  | 5.2
Net proceeds |  |  | 4.6 |  |
Pre-tax gain on sale of land |  |  | $ 4.4 |  |
Kronos Worldwide, Inc. |  |  |  |  |
Disclosure Other Income Net Additional Information Detail [Line Items] |  |  |  |  |
Gain on insurance settlement related to property damage claim |  | $ 1.5 |  |  |
BMI |  |  |  |  |
Disclosure Other Income Net Additional Information Detail [Line Items] |  |  |  |  |
Pre-tax gain on sale of land | $ 4.0 |  |  |  |
City Of Henderson |  |  |  |  |
Disclosure Other Income Net Additional Information Detail [Line Items] |  |  |  |  |
Infrastructure reimbursement |  |  |  | $ 19.1 | $ 8.8

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- Definition The amount recovered from insurance. These recoveries reduce costs and losses that are reported as a separate line item under operating expenses. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03.3) -URI http://asc.fasb.org/extlink&oid=120395209&loc=SL114868664-224227 + Details
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- Definition The cash inflow from the sale of land held for investment; excludes sales of land held as inventory or productive use. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 12 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=121586364&loc=d3e3179-108585 + Details
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- Definition Disclosure Other Income Net Additional Information Detail [Line Items] + References No definition available. + Details
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- Definition Gain (loss) on insurance settlement. + References No definition available. + Details
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- Definition Infrastructure development cost reimbursed. + References No definition available. + Details
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- Definition Pre tax gain on sale of land. + References No definition available. + Details
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- Details
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- Details
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- Details
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- Details
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