Valhi stockholders equity (Tables)

12 Months Ended

Dec. 31, 2023

Equity [Abstract]

Schedule of Common Stock Outstanding

	Shares of common stock
	Issued	Treasury	Outstanding
	(In millions)
Balance at December 31, 2021, 2022 and 2023	29.6	(1.1)	28.5

Accumulated Other Comprehensive Loss (Loss)

	Years ended December 31,
	2021		2022		2023
	(In millions)
Accumulated other comprehensive income (loss) (net of tax and   noncontrolling interest):
Marketable securities:
Balance at beginning of year	$	1.8	$	1.7	$	1.6
Other comprehensive income:
Unrealized gain (loss) arising during the year		(.1)		(.1)		.1
Balance at end of year	$	1.7	$	1.6	$	1.7
Currency translation:
Balance at beginning of year	$	(67.4)	$	(72.2)	$	(91.5)
Other comprehensive income (loss) arising during the year		(4.8)		(19.3)		2.7
Balance at end of year	$	(72.2)	$	(91.5)	$	(88.8)
Defined benefit pension plans:
Balance at beginning of year	$	(154.1)	$	(120.9)	$	(55.0)
Other comprehensive income:
Amortization of prior service cost and net losses   included in net periodic pension cost		10.7		7.3		1.9
Net actuarial gain (loss) arising during the year		22.5		58.4		(10.0)
Plan settlement		—		.2		4.3
Balance at end of year	$	(120.9)	$	(55.0)	$	(58.8)
OPEB plans:
Balance at beginning of year	$	.3	$	.1	$	1.0
Other comprehensive income:
Amortization of prior service credit and net losses    included in net periodic OPEB cost		(.3)		(.5)		(.7)
Net actuarial gain arising during the year		.1		1.4		.1
Balance at end of year	$	.1	$	1.0	$	.4
Total accumulated other comprehensive loss:
Balance at beginning of year	$	(219.4)	$	(191.3)	$	(143.9)
Other comprehensive income (loss)		28.1		47.4		(1.6)
Balance at end of year	$	(191.3)	$	(143.9)	$	(145.5)