CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (LOSS) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Net income (loss)	$ 301.0	$ 302.6	$ (3.0)
Other comprehensive income (loss), net of tax:
Currency translation	(29.4)	47.9	(14.5)
Interest rate swap		1.5	0.2
Marketable securities		5.0	4.0
Total other comprehensive income (loss), net	(37.1)	64.6	(30.9)
Comprehensive income (loss)	263.9	367.2	(33.9)
Comprehensive income (loss) attributable to noncontrolling interest	29.0	116.8	(6.9)
Comprehensive income (loss) attributable to Valhi stockholders	234.9	250.4	(40.8)
Defined Benefit Pension Plans
Other comprehensive income (loss), net of tax:
Pension and other postretirement benefit plan	(6.8)	11.0	(19.7)
OPEB
Other comprehensive income (loss), net of tax:
Pension and other postretirement benefit plan	$ (0.9)	$ (0.8)	$ (0.9)