CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (LOSS) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (LOSS)
Net income	$ 161.3	$ 5.1	$ 133.1
Other comprehensive income (loss), net of tax:
Currency translation	(30.8)	3.6	(26.1)
Defined benefit pension plans	12.6	(5.9)	89.4
Other	(0.3)	(0.6)	1.0
Total other comprehensive income (loss), net	(18.5)	(2.9)	64.3
Comprehensive income	142.8	2.2	197.4
Comprehensive income attributable to noncontrolling interest	48.5	13.7	62.8
Comprehensive income (loss) attributable to Valhi stockholders	$ 94.3	$ (11.5)	$ 134.6