CONSOLIDATED STATEMENTS OF INCOME - USD ($) shares in Millions, $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Revenues and other income:
Net sales	$ 2,296.4	$ 1,849.7	$ 1,897.5
Other income, net	39.0	28.4	40.9
Total revenues and other income	2,335.4	1,878.1	1,938.4
Cost and expenses:
Cost of sales	1,716.2	1,437.6	1,462.9
Selling, general and administrative	311.9	283.6	294.2
Litigation settlement expense, net			19.3
Other components of net periodic pension and OPEB expense	17.0	20.1	16.5
Interest	32.5	36.2	40.8
Total costs and expenses	2,077.6	1,777.5	1,833.7
Income from continuing operations before income taxes	257.8	100.6	104.7
Income tax expense (benefit)	60.1	15.9	26.5
Net income from continuing operations	197.7	84.7	78.2
Income from discontinued operations, net of tax		4.3
Net income	197.7	89.0	78.2
Noncontrolling interest in net income of subsidiaries	70.5	33.8	29.0
Net income attributable to Valhi stockholders	127.2	55.2	49.2
Amounts attributable to Valhi stockholders:
Income from continuing operations	127.2	50.9	49.2
Income from continuing operations - basic	127.2	50.9	49.2
Income from continuing operations - diluted	127.2	50.9	49.2
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	127.2	55.2	49.2
Net income - basic	127.2	55.2	49.2
Net income - diluted	$ 127.2	$ 55.2	$ 49.2
Basic and diluted net income per share:
Income per share from continuing operations - basic	$ 4.46	$ 1.79	$ 1.73
Income per share from continuing operations - diluted	4.46	1.79	1.73
Income per share from discontinued operations - basic		0.15
Income per share from discontinued operations - diluted		0.15
Net income per basic share	4.46	1.94	1.73
Net income per diluted share	$ 4.46	$ 1.94	$ 1.73
Weighted average shares outstanding - basic	28.5	28.5	28.5
Weighted average shares outstanding - diluted	28.5	28.5	28.5