CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Millions	9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023
Cash flows from operating activities:
Net income (loss)	$ 128.9	$ (6.6)
Depreciation and amortization	51.2	40.7
Gain on remeasurement of investment in TiO2 manufacturing joint venture	(64.5)	0.0
Premium on issuance of senior secured notes	6.0	0.0
Loss on pension plan termination	0.0	6.2
Benefit plan expense less than cash funding	(6.9)	(5.7)
Deferred income taxes	20.0	(38.6)
Contributions to TiO2 manufacturing joint venture, net	(2.7)	(2.8)
Gain from sale of land	0.0	(1.5)
Other, net	(0.8)	4.6
Change in assets and liabilities:
Accounts and other receivables, net	(67.8)	(60.9)
Inventories, net	96.4	103.3
Land held for development, net	2.0	0.2
Accounts payable and accrued liabilities	(110.4)	(78.4)
Income taxes	1.8	1.6
Accounts with affiliates	(20.2)	(5.8)
Other, net	(34.8)	(17.5)
Net cash used in operating activities	(1.8)	(61.2)
Cash flows from investing activities:
Capital expenditures	(18.4)	(42.7)
Acquisition of remaining TiO2 manufacturing joint venture interest, net of cash acquired	(156.8)	0.0
Purchases of marketable securities	(1.0)	(63.7)
Proceeds from disposal of marketable securities	55.8	56.5
Proceeds from land sales	0.0	1.8
Other, net	2.8	0.0
Net cash used in investing activities	(117.6)	(48.1)
Cash flows from financing activities:
Borrowings	148.6	0.0
Payments	(123.9)	0.0
Payments on long-term debt	(101.3)	(24.5)
Kronos term loan from Contran	53.7	0.0
Proceeds from issuance of senior secured notes	80.2	0.0
Deferred financing fees	(9.3)	0.0
Valhi cash dividends paid	(6.8)	(6.8)
Distributions to noncontrolling interest in subsidiaries	(23.1)	(19.0)
Subsidiary treasury stock acquired	0.0	(2.9)
Net cash provided by (used in) financing activities	18.1	(53.2)
Cash, cash equivalents and restricted cash and cash equivalents - net change from:
Operating, investing and financing activities	(101.3)	(162.5)
Effect of exchange rates on cash	4.4	(2.8)
Balance at beginning of period	462.0	562.0
Balance at end of period	365.1	396.7
Cash paid for:
Interest, net of amounts capitalized	37.2	24.0
Income taxes, net	41.1	24.5
Noncash investing activities:
Change in accruals for capital expenditures	$ 1.4	$ 0.7