CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (LOSS) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2025	Mar. 31, 2024
CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (LOSS)
Net income	$ 22.8	$ 13.6
Other comprehensive income (loss), net of tax:
Currency translation	15.5	(18.3)
Defined benefit pension plans	0.6	0.7
Other	(0.1)	(0.1)
Total other comprehensive income (loss), net	16.0	(17.7)
Comprehensive income (loss)	38.8	(4.1)
Comprehensive income attributable to noncontrolling interest	10.1	1.2
Comprehensive income (loss) attributable to Valhi stockholders	$ 28.7	$ (5.3)