CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (LOSS) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016
Net income (loss)	$ 55.1	$ (7.7)	$ 76.9	$ (29.7)
Other comprehensive income (loss), net of tax:
Currency translation	12.6	(4.1)	20.1	7.8
Marketable securities	(0.5)	0.8	(0.8)	0.5
Interest rate swap	(0.4)	(0.7)	0.1	(3.0)
Total other comprehensive income (loss), net	12.3	(1.7)	22.6	9.9
Comprehensive income (loss)	67.4	(9.4)	99.5	(19.8)
Comprehensive income attributable to noncontrolling interest	49.2	0.9	61.0	1.4
Comprehensive income (loss) attributable to Valhi stockholders	18.2	(10.3)	38.5	(21.2)
Defined Benefit Pension Plans
Other comprehensive income (loss), net of tax:
Pension and other postretirement benefit plan	0.8	2.6	3.6	5.2
OPEB
Other comprehensive income (loss), net of tax:
Pension and other postretirement benefit plan	$ (0.2)	$ (0.3)	$ (0.4)	$ (0.6)