CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (LOSS) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Net income (loss)	$ 63.9	$ 9.0	$ 140.8	$ (20.7)
Other comprehensive income (loss), net of tax:
Currency translation	26.1	7.5	46.2	15.3
Marketable securities	(1.1)	1.4	(1.9)	1.9
Interest rate swap	1.6	0.6	1.7	(2.4)
Total other comprehensive income, net	28.7	11.8	51.3	21.7
Comprehensive income	92.6	20.8	192.1	1.0
Comprehensive income attributable to noncontrolling interest	24.7	10.3	85.7	11.7
Comprehensive income (loss) attributable to Valhi stockholders	67.9	10.5	106.4	(10.7)
Defined Benefit Pension Plans
Other comprehensive income (loss), net of tax:
Pension and other postretirement benefit plan	2.4	2.6	6.0	7.8
OPEB
Other comprehensive income (loss), net of tax:
Pension and other postretirement benefit plan	$ (0.3)	$ (0.3)	$ (0.7)	$ (0.9)