CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (LOSS) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023
CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (LOSS)
Net income (loss)	$ (54.9)	$ 161.3	$ 5.1
Other comprehensive income (loss), net of tax:
Currency translation	29.4	(30.8)	3.6
Defined benefit pension plans	41.5	12.6	(5.9)
Other	0.2	(0.3)	(0.6)
Total other comprehensive income (loss), net	71.1	(18.5)	(2.9)
Comprehensive income	16.2	142.8	2.2
Comprehensive income attributable to noncontrolling interest	20.4	48.5	13.7
Comprehensive income (loss) attributable to Valhi stockholders	$ (4.2)	$ 94.3	$ (11.5)