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v3.23.1

Business and geographic segments - Additional Information (Detail) $ in Millions | 3 Months Ended
--- | ---
Mar. 31, 2023 USD ($)
Segment Reporting Information [Line Items] |
Insurance recoveries | $ 1.7
Kronos Worldwide, Inc. | Valhi Incorporation |
Segment Reporting Information [Line Items] |
Direct ownership percentage by parent | 50.00%
Kronos Worldwide, Inc. | NL |
Segment Reporting Information [Line Items] |
Indirect controlling interest in subsidiary | 31.00%
NL | Valhi Incorporation |
Segment Reporting Information [Line Items] |
Direct ownership percentage by parent | 83.00%
LandWell | Valhi Incorporation |
Segment Reporting Information [Line Items] |
Direct ownership percentage by parent | 27.00%
LandWell | BMI |
Segment Reporting Information [Line Items] |
Indirect controlling interest in subsidiary | 50.00%
BMI | Valhi Incorporation |
Segment Reporting Information [Line Items] |
Direct ownership percentage by parent | 63.00%

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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 https://asc.fasb.org/extlink&oid=126953954&loc=SL114868664-224227 + Details
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- Definition The parent entity's interest in net assets of the subsidiary, expressed as a percentage. + References No definition available. + Details
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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
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- Definition Controlling interest in subsidiary held indirectly through controlled subsidiary of parent. + 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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- Details
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- Details
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