CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Cash flows from operating activities:
Net income	$ 2.9	$ 136.1	$ 197.7
Depreciation and amortization	54.1	58.5	59.3
Gain from sale of land	(1.5)		(16.0)
Loss on pension plan termination	6.2
Water system fixed asset impairment		16.4
Fixed asset impairment	3.8
Loss on sale of Basic Power Company (BPC)	2.6
Loss on deconsolidation of BWC		2.0
Noncash interest expense	2.0	2.2	2.9
Benefit plan expense greater (less) than cash funding	(6.2)	8.6	11.4
Deferred income taxes	(48.1)	0.6	12.1
Distributions from (contributions to) TiO2 manufacturing joint venture, net	3.1	(10.5)	3.8
Other, net	2.6	10.1	2.3
Change in assets and liabilities:
Accounts and other receivables, net	(44.6)	81.1	(64.6)
Inventories, net	56.7	(204.2)	58.3
Land held for development, net	0.8	21.4	49.6
Accounts payable and accrued liabilities	11.2	3.9	154.3
Income taxes	9.3	(0.5)	(1.6)
Accounts with affiliates	(27.8)	9.4	(24.3)
Other noncurrent assets	(9.5)	(3.4)	(15.9)
Other noncurrent liabilities	(19.3)	(83.9)	53.7
Other, net	5.6	(12.9)	(23.3)
Net cash provided by operating activities	3.9	34.9	459.7
Cash flows from investing activities:
Capital expenditures	(48.5)	(67.6)	(64.1)
Cash and cash equivalents of BPC at time of sale	(1.7)
Cash, cash equivalents and restricted cash of BWC		(8.6)
Purchases of marketable securities	(66.4)	(73.6)	(4.0)
Proceeds from disposal of marketable securities	85.7	2.9	5.2
Proceeds from land sales	1.8		23.4
Other, net	0.1	0.2	2.1
Net cash used in investing activities	(29.0)	(146.7)	(37.4)
Cash flows from financing activities:
Principal payments on indebtedness	(29.8)	(62.0)	(102.3)
Valhi cash dividends paid	(9.1)	(9.0)	(9.0)
Distributions to noncontrolling interest in subsidiaries	(34.0)	(38.9)	(74.4)
Subsidiary treasury stock acquired	(2.9)	(4.0)	(1.5)
Other, net	(0.1)	(0.1)	(1.9)
Net cash used in financing activities	(75.9)	(114.0)	(189.1)
Cash, cash equivalents and restricted cash and cash equivalents - net change from:
Operating, investing and financing activities	(101.0)	(225.8)	233.2
Effect of exchange rates on cash	1.0	(5.1)	(10.6)
Balance at beginning of year	562.0	792.9	570.3
Balance at end of year	462.0	562.0	792.9
Cash paid for:
Interest, net of amounts capitalized	26.6	25.8	29.2
Income taxes, net	27.4	43.7	65.9
Noncash investing activities:
Change in accruals for capital expenditures	$ 1.1	$ 6.6	$ 4.6