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Stockholders' equity | 9 Months Ended
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Sep. 30, 2025
Stockholders' equity |
Stockholders' equity | Note 15 – Stockholders’ equity: Accumulated other comprehensive loss – Changes in accumulated other comprehensive income (loss) attributable to Valhi stockholders are presented in the table below. ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | Three months ended | ​ | Nine months ended
​ | ​ | September 30, | ​ | September 30,
​ |  | 2024 |  | 2025 |  | 2024 |  | 2025
​ | ​ | (In millions)
Accumulated other comprehensive income (loss) (net of tax and noncontrolling interest): |  | ​ |  |  | ​ |  |  | ​ |  |  | ​ |
Marketable securities: | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Balance at beginning of period | ​ | $ | 1.7 | ​ | $ | 1.7 | ​ | $ | 1.7 | ​ | $ | 1.7
Other comprehensive income: | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Unrealized gain arising during the period | ​ | ​ | .1 | ​ | ​ | — | ​ | ​ | .1 | ​ | ​ | —
Balance at end of period | ​ | $ | 1.8 | ​ | $ | 1.7 | ​ | $ | 1.8 | ​ | $ | 1.7
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Currency translation: | ​ |  |  | ​ |  |  | ​ |  |  | ​ |  |
Balance at beginning of period | ​ | $ | (101.2) | ​ | $ | (90.8) | ​ | $ | (88.8) | ​ | $ | (111.7)
Other comprehensive income (loss) arising during the period | ​ |  | 4.1 | ​ |  | .1 | ​ |  | (8.3) | ​ |  | 21.0
Balance at end of period | ​ | $ | (97.1) | ​ | $ | (90.7) | ​ | $ | (97.1) | ​ | $ | (90.7)
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Defined benefit pension plans: | ​ |  |  | ​ |  |  | ​ |  |  | ​ |  |
Balance at beginning of period | ​ | $ | (57.8) | ​ | $ | (48.5) | ​ | $ | (58.8) | ​ | $ | (49.4)
Other comprehensive income: | ​ |  |  | ​ |  |  | ​ |  |  | ​ |  |
Amortization of prior service cost and net losses included in net periodic pension cost | ​ |  | .6 | ​ |  | .5 | ​ |  | 1.6 | ​ |  | 1.4
Balance at end of period | ​ | $ | (57.2) | ​ | $ | (48.0) | ​ | $ | (57.2) | ​ | $ | (48.0)
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
OPEB plans: | ​ |  |  | ​ |  |  | ​ |  |  | ​ |  |
Balance at beginning of period | ​ | $ | .3 | ​ | $ | .1 | ​ | $ | .4 | ​ | $ | .2
Other comprehensive income: | ​ |  |  | ​ |  |  | ​ |  |  | ​ |  |
Amortization of prior service credit and net losses included in net periodic OPEB cost | ​ |  | (.1) | ​ |  | (.1) | ​ |  | (.2) | ​ |  | (.2)
Balance at end of period | ​ | $ | .2 | ​ | $ | — | ​ | $ | .2 | ​ | $ | —
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Total accumulated other comprehensive loss: | ​ |  |  | ​ |  |  | ​ |  |  | ​ |  |
Balance at beginning of period | ​ | $ | (157.0) | ​ | $ | (137.5) | ​ | $ | (145.5) | ​ | $ | (159.2)
Other comprehensive income (loss) | ​ |  | 4.7 | ​ |  | .5 | ​ |  | (6.8) | ​ |  | 22.2
Balance at end of period | ​ | $ | (152.3) | ​ | $ | (137.0) | ​ | $ | (152.3) | ​ | $ | (137.0)
​

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- Definition The entire disclosure for comprehensive income, which includes, but is not limited to, 1) the amount of income tax expense or benefit allocated to each component of other comprehensive income, including reclassification adjustments, 2) the reclassification adjustments for each classification of other comprehensive income and 3) the ending accumulated balances for each component of comprehensive income. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 944 -SubTopic 220 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-04(19)) -Publisher FASB -URI https://asc.fasb.org/1943274/2147477250/944-220-S99-1 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 220 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03(21)) -Publisher FASB -URI https://asc.fasb.org/1943274/2147483621/220-10-S99-2 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Topic 942 -SubTopic 220 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-04(23)) -Publisher FASB -URI https://asc.fasb.org/1943274/2147478524/942-220-S99-1 Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 220 -Name Accounting Standards Codification -Publisher FASB -URI https://asc.fasb.org/220/tableOfContent + Details
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