CONDENSED CONSOLIDATED STATEMENTS OF INCOME - USD ($) shares in Millions, $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Revenues and other income:
Net sales	$ 578.9	$ 458.6	$ 1,613.2	$ 1,332.9
Other, net	13.1	2.6	27.9	33.9
Total revenues and other income	592.0	461.2	1,641.1	1,366.8
Costs and expenses:
Cost of sales	426.2	368.9	1,226.6	1,039.5
Selling, general and administrative	82.2	70.2	231.6	210.7
Other components of net periodic pension and OPEB expense	4.3	5.2	13.2	14.9
Interest	7.9	8.9	25.2	27.4
Total costs and expenses	520.6	453.2	1,496.6	1,292.5
Income before income taxes	71.4	8.0	144.5	74.3
Income tax expense (benefit)	16.9	(11.4)	35.2	21.2
Net income	54.5	19.4	109.3	53.1
Noncontrolling interest in net income of subsidiaries	15.5	4.0	34.1	22.4
Net income attributable to Valhi stockholders	$ 39.0	$ 15.4	$ 75.2	$ 30.7
Amounts attributable to Valhi stockholders:
Basic and diluted net income per share	$ 1.36	$ 0.54	$ 2.64	$ 1.08
Basic and diluted weighted average shares outstanding	28.5	28.5	28.5	28.5