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v3.22.2.2

Business Segment Information - Additional Information (Detail) $ in Millions | 3 Months Ended | 6 Months Ended | 9 Months Ended
--- | --- | --- | ---
Sep. 30, 2022 USD ($) | Sep. 30, 2022 USD ($) | Sep. 30, 2022 USD ($)
Segment Reporting Information [Line Items] |  |  |
Insurance recoveries | $ 2.7 |  | $ 2.7
Fixed asset impairment | 0.4 | $ 16.4 | 16.4
Loss on deconsolidation of BWC | $ (2.0) |  | $ (2.0)
Kronos Worldwide, Inc. | Valhi Incorporation |  |  |
Segment Reporting Information [Line Items] |  |  |
Direct ownership percentage by parent | 50.00% | 50.00% | 50.00%
Kronos Worldwide, Inc. | NL |  |  |
Segment Reporting Information [Line Items] |  |  |
Indirect controlling interest in subsidiary | 31.00% | 31.00% | 31.00%
NL | Valhi Incorporation |  |  |
Segment Reporting Information [Line Items] |  |  |
Direct ownership percentage by parent | 83.00% | 83.00% | 83.00%
LandWell | Valhi Incorporation |  |  |
Segment Reporting Information [Line Items] |  |  |
Direct ownership percentage by parent | 27.00% | 27.00% | 27.00%
LandWell | BMI |  |  |
Segment Reporting Information [Line Items] |  |  |
Indirect controlling interest in subsidiary | 50.00% | 50.00% | 50.00%
BMI |  |  |
Segment Reporting Information [Line Items] |  |  |
Loss on deconsolidation of BWC | $ 2.0 |  |
Bad debt expense recognized | $ 1.3 |  |
BMI | Valhi Incorporation |  |  |
Segment Reporting Information [Line Items] |  |  |
Direct ownership percentage by parent | 63.00% | 63.00% | 63.00%

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