CONSOLIDATED STATEMENTS OF INCOME - USD ($) shares in Millions, $ in Millions	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Revenues and other income:
Net sales	$ 2,222.5	$ 2,296.4	$ 1,849.7
Other income, net	43.7	39.0	28.4
Total revenues and other income	2,266.2	2,335.4	1,878.1
Cost and expenses:
Cost of sales	1,732.1	1,716.2	1,437.6
Selling, general and administrative	304.0	311.9	283.6
Fixed asset impairment	16.4
Loss on deconsolidation of Basic Water Company ("BWC")	2.0
Other components of net periodic pension and OPEB expense	13.9	17.0	20.1
Interest	27.9	32.5	36.2
Total costs and expenses	2,096.3	2,077.6	1,777.5
Income from continuing operations before income taxes	169.9	257.8	100.6
Income tax expense	33.8	60.1	15.9
Net income from continuing operations	136.1	197.7	84.7
Income from discontinued operations, net of tax			4.3
Net income	136.1	197.7	89.0
Noncontrolling interest in net income of subsidiaries	45.9	70.5	33.8
Net income attributable to Valhi stockholders	90.2	127.2	55.2
Net income - basic	90.2	127.2	55.2
Net income - diluted	90.2	127.2	55.2
Amounts attributable to Valhi stockholders:
Income from continuing operations	90.2	127.2	50.9
Income from continuing operations - basic	90.2	127.2	50.9
Income from continuing operations - diluted	90.2	127.2	50.9
Income from discontinued operations			4.3
Income from discontinued operations - basic			4.3
Income from discontinued operations - diluted			4.3
Net income attributable to Valhi stockholders	90.2	127.2	55.2
Net income - basic	90.2	127.2	55.2
Net income - diluted	$ 90.2	$ 127.2	$ 55.2
Basic and diluted net income per share:
Income per share from continuing operations - basic	$ 3.16	$ 4.46	$ 1.79
Income per share from continuing operations - diluted	3.16	4.46	1.79
Income per share from discontinued operations - basic			0.15
Income per share from discontinued operations - diluted			0.15
Net income per basic share	3.16	4.46	1.94
Net income per diluted share	$ 3.16	$ 4.46	$ 1.94
Weighted average shares outstanding - basic	28.5	28.5	28.5
Weighted average shares outstanding - diluted	28.5	28.5	28.5