CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Millions	6 Months Ended
	Jun. 30, 2025	Jun. 30, 2024
Cash flows from operating activities:
Net income	$ 30.3	$ 43.3
Depreciation and amortization	31.9	32.4
Benefit plan expense less than cash funding	(4.0)	(4.4)
Deferred income taxes	3.2	(4.0)
Distributions from TiO2 manufacturing joint venture, net		9.8
Other, net	1.0	4.3
Change in assets and liabilities:
Accounts and other receivables, net	(18.2)	(79.3)
Inventories, net	15.8	103.4
Land held for development, net	(4.2)	1.5
Accounts payable and accrued liabilities	(100.8)	(130.1)
Accrued environmental remediation and related costs	(56.0)
Income taxes	(17.8)	(5.5)
Accounts with affiliates	(29.4)	(0.3)
Other, net	14.0	13.6
Net cash used in operating activities	(134.2)	(15.3)
Cash flows from investing activities:
Capital expenditures	(25.4)	(8.8)
Purchases of marketable securities		(1.0)
Proceeds from disposal of marketable securities	0.7	43.8
Net cash provided by (used in) investing activities	(24.7)	34.0
Cash flows from financing activities:
Borrowings	306.3
Payments	(280.9)
Kronos term loan from Contran		53.7
Payments on long-term debt	(12.0)	(83.7)
Valhi cash dividends paid	(4.5)	(4.5)
Distributions to noncontrolling interest in subsidiaries	(9.6)	(12.9)
Deferred financing fees		(5.8)
Net cash used in financing activities	(0.7)	(53.2)
Cash, cash equivalents and restricted cash and cash equivalents - net change from:
Operating, investing and financing activities	(159.6)	(34.5)
Effect of exchange rates on cash	4.0	(0.2)
Balance at beginning of period	378.6	462.0
Balance at end of period	223.0	427.3
Cash paid for:
Interest, net of amounts capitalized	24.8	11.4
Income taxes, net	50.7	35.7
Noncash investing activities:
Change in accruals for capital expenditures	$ 3.0	$ 0.5