Kronos Worldwide (KRO) 10-Q 2 Nov 23 2023 Q3 Quarterly report Financial data

Document and Entity Information

Document and Entity Information - shares	9 Months Ended
	Sep. 30, 2023	Oct. 27, 2023
Cover [Abstract]
Document Type	10-Q
Document Quarterly Report	true
Document Period End Date	Sep. 30, 2023
Document Transition Report	false
Entity File Number	1-31763
Entity Registrant Name	KRONOS WORLDWIDE, INC.
Entity Incorporation, State or Country Code	DE
Entity Tax Identification Number	76-0294959
Entity Address, Address Line One	5430 LBJ Freeway
Entity Address, Address Line Two	Suite 1700
Entity Address, City or Town	Dallas
Entity Address, State or Province	TX
Entity Address, Postal Zip Code	75240-2620
City Area Code	972
Local Phone Number	233-1700
Title of 12(b) Security	Common stock
Trading Symbol	KRO
Security Exchange Name	NYSE
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Filer Category	Accelerated Filer
Entity Small Business	false
Entity Emerging Growth Company	false
Entity Shell Company	false
Entity Common Stock, Shares Outstanding		115,027,016
Entity Central Index Key	0001257640
Current Fiscal Year End Date	--12-31
Document Fiscal Year Focus	2023
Document Fiscal Period Focus	Q3
Amendment Flag	false

CONDENSED CONSOLIDATED BALANCE

CONDENSED CONSOLIDATED BALANCE SHEETS - USD ($) $ in Millions	Sep. 30, 2023	Dec. 31, 2022
Current assets:
Cash and cash equivalents	$ 155.3	$ 327.8
Restricted cash	1.6	2
Accounts and other receivables, net	299.8	255.1
Inventories, net	497.8	608.7
Prepaid expenses and other	45.2	48.6
Total current assets	999.7	1,242.2
Other assets:
Investment in TiO2 manufacturing joint venture	115.7	112.9
Restricted cash	4.9	4.8
Marketable securities	1.9	3.2
Operating lease right-of-use assets	21	21.5
Deferred income taxes	82.4	52
Other	13.6	13.3
Total other assets	239.5	207.7
Property and equipment:
Land	42.4	41.9
Buildings	224.6	214.7
Equipment	1,114.1	1,093.2
Mining properties	123.4	119.6
Construction in progress	49.4	76.5
Gross property and equipment	1,553.9	1,545.9
Less accumulated depreciation and amortization	1,077.2	1,061.4
Net property and equipment	476.7	484.5
Total assets	1,715.9	1,934.4
Current liabilities:
Current maturities of long-term debt	0.7	1.1
Accounts payable and accrued liabilities	246.4	312.3
Income taxes	9.1	13.3
Total current liabilities	256.2	326.7
Noncurrent liabilities:
Long-term debt	422.5	424.1
Accrued pension costs	122.3	128.6
Payable to affiliate - income taxes	18.6	33.5
Operating lease liabilities	16.9	17.4
Deferred income taxes	25.5	26.4
Other	20.7	20.5
Total noncurrent liabilities	626.5	650.5
Stockholders' equity:
Common stock	1.2	1.2
Additional paid-in capital	1,390.2	1,394.3
Retained deficit	(214.8)	(105.4)
Accumulated other comprehensive loss	(343.4)	(331.5)
Treasury stock, at cost	0	(1.4)
Total stockholders' equity	833.2	957.2
Total liabilities and stockholders' equity	$ 1,715.9	$ 1,934.4

CONDENSED CONSOLIDATED STATEMEN

CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) shares in Millions, $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
Income Statement [Abstract]
Net sales	$ 396.9	$ 459.6	$ 1,266.4	$ 1,587.8
Cost of sales	362.5	375.6	1,157.1	1,234
Gross margin	34.4	84	109.3	353.8
Selling, general and administrative expense	53.6	59	156.9	183.6
Other operating income (expense):
Currency transactions, net	(3.9)	6.7	4.6	17.1
Other operating expense, net	(2.2)	(0.9)	(7.3)	(8)
Income (loss) from operations	(25.3)	30.8	(50.3)	179.3
Other income (expense):
Interest and dividend income	1.5	1.4	5	2.1
Marketable equity securities	0	(2.9)	(1.3)	(0.5)
Other components of net periodic pension and OPEB cost	(1)	(2.9)	(4.1)	(9.2)
Interest expense	(4.3)	(4.2)	(12.8)	(13)
Income (loss) before income taxes	(29.1)	22.2	(63.5)	158.7
Income tax expense (benefit)	(8.7)	1.2	(19.7)	34.3
Net income (loss)	$ (20.4)	$ 21	$ (43.8)	$ 124.4
Net income per share - basic	$ (0.18)	$ 0.18	$ (0.38)	$ 1.08
Net income per share - diluted	$ (0.18)	$ 0.18	$ (0.38)	$ 1.08
Weighted average shares outstanding - basic	115	115.5	115.1	115.5
Weighted average shares outstanding - diluted	115	115.5	115.1	115.5

CONDENSED CONSOLIDATED STATEM_2

CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (LOSS) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
Net income (loss)	$ (20.4)	$ 21	$ (43.8)	$ 124.4
Other comprehensive income (loss), net of tax:
Currency translation	(1.4)	(25.9)	(14.1)	(55.6)
Total other comprehensive loss, net	(1.1)	(23.8)	(11.9)	(48.9)
Comprehensive income (loss)	(21.5)	(2.8)	(55.7)	75.5
Defined benefit pension plans
Other comprehensive income (loss), net of tax:
Defined benefit plans	0.4	2.2	2.4	6.9
Other postretirement benefit plans
Other comprehensive income (loss), net of tax:
Defined benefit plans	$ (0.1)	$ (0.1)	$ (0.2)	$ (0.2)

CONDENSED CONSOLIDATED STATEM_3

CONDENSED CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY - USD ($) $ in Millions	Common stock	Additional paid-in capital	Retained deficit	Accumulated other comprehensive loss	Treasury Stock, Common	Total
Beginning Balance at Dec. 31, 2021	$ 1.2	$ 1,395.4	$ (122.1)	$ (404.1)	$ (0.2)	$ 870.2
Net income (loss)			124.4			124.4
Other comprehensive loss, net of tax				(48.9)		(48.9)
Issuance of common stock		0.1				0.1
Dividends paid			(65.8)			(65.8)
Treasury stock acquired					(1.1)	(1.1)
Treasury stock retired		(1.3)			1.3
Ending Balance at Sep. 30, 2022	1.2	1,394.2	(63.5)	(453)		878.9
Beginning Balance at Jun. 30, 2022	1.2	1,394.2	(62.6)	(429.2)		903.6
Net income (loss)			21			21
Other comprehensive loss, net of tax				(23.8)		(23.8)
Dividends paid			(21.9)			(21.9)
Ending Balance at Sep. 30, 2022	1.2	1,394.2	(63.5)	(453)		878.9
Treasury stock acquired					(1.4)
Ending Balance at Dec. 31, 2022	1.2	1,394.3	(105.4)	(331.5)	(1.4)	957.2
Treasury stock acquired					(2.8)
Ending Balance at Jun. 30, 2023	1.2	1,390.2	(172.6)	(342.3)		876.5
Beginning Balance at Dec. 31, 2022	1.2	1,394.3	(105.4)	(331.5)	(1.4)	957.2
Net income (loss)			(43.8)			(43.8)
Other comprehensive loss, net of tax				(11.9)		(11.9)
Issuance of common stock		0.1				0.1
Dividends paid			(65.6)			(65.6)
Treasury stock acquired					(2.8)	(2.8)
Treasury stock retired		(4.2)			$ 4.2
Ending Balance at Sep. 30, 2023	1.2	1,390.2	(214.8)	(343.4)		833.2
Beginning Balance at Jun. 30, 2023	1.2	1,390.2	(172.6)	(342.3)		876.5
Net income (loss)			(20.4)			(20.4)
Other comprehensive loss, net of tax				(1.1)		(1.1)
Dividends paid			(21.8)			(21.8)
Ending Balance at Sep. 30, 2023	$ 1.2	$ 1,390.2	$ (214.8)	$ (343.4)		$ 833.2

CONDENSED CONSOLIDATED STATEM_4

CONDENSED CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY (Parenthetical) - $ / shares	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
Statement Of Stockholders Equity [Abstract]
Cash dividends per share	$ 0.19	$ 0.19	$ 0.57	$ 0.57

CONDENSED CONSOLIDATED STATEM_5

CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Millions	9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022
Cash flows from operating activities:
Net income (loss)	$ (43.8)	$ 124.4
Depreciation	36.6	39
Amortization of operating lease right-of-use assets	3.4	3.4
Deferred income taxes	(31.7)	1.6
Benefit plan expense greater (less) than cash funding	(4.3)	4.8
Marketable equity securities	1.3	0.5
Contributions to TiO2 manufacturing joint venture, net	(2.8)	(8.5)
Other, net	1.6	3.2
Change in assets and liabilities:
Accounts and other receivables, net	(57.2)	(17.9)
Inventories, net	106.5	(134.1)
Prepaid expenses	3	(14.8)
Accounts payable and accrued liabilities	(71.2)	52.2
Income taxes	3.8	(2.5)
Accounts with affiliates	(5.2)	6.5
Other, net	1.1	1.3
Net cash provided by (used in) operating activities	(58.9)	59.1
Cash flows from investing activities:
Capital expenditures	(42.1)	(44.4)
Other	0	0.1
Net cash used in investing activities	(42.1)	(44.3)
Cash flows from financing activities:
Payments on long-term debt	(0.5)	(0.5)
Dividends paid	(65.6)	(65.8)
Treasury stock acquired	(2.9)	(1.1)
Net cash used in financing activities	(69)	(67.4)
Cash, cash equivalents and restricted cash - net change from:
Operating, investing and financing activities	(170)	(52.6)
Effect of currency exchange rate changes on cash	(2.8)	(15.6)
Balance at beginning of period	334.6	412.6
Balance at end of period	161.8	344.4
Cash paid for:
Interest, net of amount capitalized	15.8	15.8
Income taxes	15.2	32.2
Accrual for capital expenditures	$ 0.8	$ 2

Organization and basis of prese

Organization and basis of presentation:	9 Months Ended
	Sep. 30, 2023
Accounting Policies [Abstract]
Organization and Basis of Presentation	Note 1 - Organization and basis of presentation: Organization Basis of presentation Unless otherwise indicated, references in this report to “we,” “us” or “our” refer to Kronos Worldwide, Inc. and its subsidiaries (NYSE: KRO) taken as a whole.

Accounts and Other Receivables,

Accounts and Other Receivables, Net	9 Months Ended
	Sep. 30, 2023
Receivables [Abstract]
Accounts and Other Receivables, Net	Note 2 - Accounts and other receivables, net: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ December 31, ​ September 30, ​ 2022 2023 ​ ​ (In millions) Trade receivables ​ $ 220.3 ​ $ 282.2 Recoverable VAT and other receivables ​ 28.5 ​ 21.1 Receivables from affiliates, other ​ ​ 2.7 ​ ​ .5 Refundable income taxes ​ 7.1 ​ .1 Allowance for doubtful accounts ​ (3.5) ​ (4.1) Total ​ $ 255.1 ​ $ 299.8 ​

Inventories, Net

Inventories, Net	9 Months Ended
	Sep. 30, 2023
Inventory Disclosure [Abstract]
Inventories, Net	Note 3 - Inventories, net: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ December 31, ​ September 30, ​ 2022 2023 ​ ​ (In millions) Raw materials ​ $ 145.3 ​ $ 132.6 Work in process ​ 32.0 ​ 32.6 Finished products ​ 349.9 ​ 246.2 Supplies ​ 81.5 ​ 86.4 Total ​ $ 608.7 ​ $ 497.8 ​

Marketable Securities

Marketable Securities	9 Months Ended
	Sep. 30, 2023
Investments Debt And Equity Securities [Abstract]
Marketable Securities	Note 4 - Marketable securities: Our marketable securities consist of investments in the publicly-traded shares of our related party, Valhi. Our marketable securities are accounted for as available-for-sale securities, which are carried at fair value using quoted market prices in active markets for each marketable security and represent a Level 1 input within the fair value hierarchy. Unrealized gains or losses on equity securities are recognized in Other income (expense) - Marketable equity securities on our Condensed Consolidated Statements of Operations. ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Fair value ​ ​ ​ ​ ​ ​ ​ ​ measurement ​ Market ​ Cost ​ Unrealized Marketable security level value basis loss ​ ​ ​ (In millions) December 31, 2022: ​ ​ ​ Valhi common stock 1 ​ $ 3.2 ​ $ 3.2 ​ $ - ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ September 30, 2023: ​ ​ ​ ​ ​ Valhi common stock 1 ​ $ 1.9 ​ $ 3.2 ​ $ (1.3) ​ At December 31, 2022 and September 30, 2023, we held approximately 144,000 shares of Valhi’s common stock. At December 31, 2022 and September 30, 2023, the per share quoted market price of Valhi’s common stock was $22.00 and $13.26, respectively. The Valhi common stock we own is subject to the restrictions on resale pursuant to certain provisions of the Securities and Exchange Commission (SEC) Rule 144. In addition, as a majority-owned subsidiary of Valhi we cannot vote our shares of Valhi common stock under Delaware General Corporation Law, but we do receive dividends from Valhi on these shares when declared and paid.

Long-Term debt

Long-Term debt	9 Months Ended
	Sep. 30, 2023
Debt Disclosure [Abstract]
Long-Term Debt	Note 5 - Long-term debt: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ December 31, ​ September 30, ​ 2022 2023 ​ ​ (In millions) Kronos International, Inc. 3.75% Senior Notes ​ $ 424.1 ​ $ 422.5 Other ​ 1.1 ​ .7 Total debt ​ 425.2 ​ 423.2 Less current maturities ​ 1.1 ​ .7 Total long-term debt ​ $ 424.1 ​ $ 422.5 ​ Senior Secured Notes Revolving credit facility borrowings Other

Accounts payable and accrued li

Accounts payable and accrued liabilities	9 Months Ended
	Sep. 30, 2023
Payables And Accruals [Abstract]
Accounts payable and accrued liabilities	Note 6 - Accounts payable and accrued liabilities: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ December 31, ​ September 30, ​ 2022 2023 ​ ​ (In millions) Accounts payable ​ $ 177.2 ​ $ 117.9 Accrued sales discounts and rebates ​ 25.6 ​ 18.2 Employee benefits ​ 22.9 ​ 26.4 Payables to affiliates: ​ ​ ​ ​ ​ ​ LPC ​ ​ 17.1 ​ ​ 20.0 NL Industries, Inc. ​ ​ - ​ ​ .9 Income taxes payable to Valhi ​ ​ 5.8 ​ ​ 13.6 Operating lease liabilities ​ 3.8 ​ 3.8 Other ​ 59.9 ​ 45.6 Total ​ $ 312.3 ​ $ 246.4 ​

Other noncurrent liabilities

Other noncurrent liabilities	9 Months Ended
	Sep. 30, 2023
Other Liabilities Disclosure [Abstract]
Other noncurrent liabilities	Note 7 - Other noncurrent liabilities: ​ ​ ​ ​ ​ ​ ​ ​ ​ December 31, ​ September 30, ​ 2022 2023 ​ ​ (In millions) Accrued postretirement benefits ​ $ 5.9 ​ $ 6.0 Employee benefits ​ 4.8 ​ 4.7 Other ​ 9.8 ​ 10.0 Total ​ $ 20.5 ​ $ 20.7 ​

Revenue Recognition

Revenue Recognition	9 Months Ended
	Sep. 30, 2023
Revenue From Contract With Customer [Abstract]
Revenue Recognition	Note 8 - Revenue recognition: The following table disaggregates our net sales by place of manufacture (point of origin) and to the location of the customer (point of destination), which are the categories that depict how the nature, amount, timing and uncertainty of revenue and cash flows are affected by economic factors. ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Three months ended ​ Nine months ended ​ ​ September 30, ​ September 30, ​ 2022 2023 2022 2023 ​ ​ (In millions) Net sales - point of origin: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ United States ​ $ 330.3 ​ $ 250.6 ​ $ 980.4 ​ $ 739.8 Germany ​ 213.5 ​ 182.3 ​ 762.0 ​ 561.9 Canada ​ 105.1 ​ 93.0 ​ 313.1 ​ 267.8 Belgium ​ 76.0 ​ 49.3 ​ 256.3 ​ 163.6 Norway ​ 64.7 ​ 40.7 ​ 211.1 ​ 187.9 Eliminations ​ (330.0) ​ (219.0) ​ (935.1) ​ (654.6) Total ​ $ 459.6 ​ $ 396.9 ​ $ 1,587.8 ​ $ 1,266.4 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Net sales - point of destination: ​ ​ ​ ​ Europe ​ $ 197.5 ​ $ 179.9 ​ $ 731.6 ​ $ 580.0 North America ​ 182.5 ​ 165.1 ​ 558.4 ​ 466.7 Other ​ 79.6 ​ 51.9 ​ 297.8 ​ 219.7 Total ​ $ 459.6 ​ $ 396.9 ​ $ 1,587.8 ​ $ 1,266.4 ​

Employee benefit plans

Employee benefit plans	9 Months Ended
	Sep. 30, 2023
Compensation And Retirement Disclosure [Abstract]
Employee benefit plans	Note 9 - Employee benefit plans: The components of net periodic defined benefit pension cost are presented in the table below. ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Three months ended ​ Nine months ended ​ ​ September 30, ​ September 30, ​ 2022 2023 2022 2023 ​ ​ (In millions) Net periodic pension cost (income): ​ ​ ​ ​ Service cost ​ $ 2.8 ​ $ 1.6 ​ $ 8.7 ​ $ 4.7 Interest cost ​ 2.7 ​ 5.2 ​ 8.3 ​ 15.4 Expected return on plan assets ​ (3.1) ​ (4.8) ​ (9.2) ​ (14.4) Recognized actuarial losses ​ 3.2 ​ .6 ​ 10.0 ​ 1.8 Settlements ​ ​ - ​ ​ - ​ ​ - ​ ​ 1.3 Total ​ $ 5.6 ​ $ 2.6 ​ $ 17.8 ​ $ 8.8 ​ In the second quarter of 2023, we completed a termination and buy-out of our pension plan in the United Kingdom resulting in a $1.3 million settlement loss. We expect our 2023 contributions for our pension plans to be approximately $17 million.

Income Taxes

Income Taxes	9 Months Ended
	Sep. 30, 2023
Income Tax Disclosure [Abstract]
Income Taxes	Note 10 - Income taxes: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Three months ended ​ Nine months ended ​ ​ September 30, ​ September 30, ​ 2022 2023 2022 2023 ​ ​ (In millions) Expected tax expense (benefit), at U.S. federal statutory ​ $ 4.7 ​ $ (6.1) ​ $ 33.3 ​ $ (13.3) Non-U.S. tax rates ​ (1.2) ​ (2.0) ​ 2.0 ​ (4.6) Incremental net tax benefit on earnings and losses of U.S. ​ (.2) ​ (1.2) ​ (.7) ​ (2.4) Valuation allowance, net ​ (3.8) ​ .4 ​ (4.5) ​ 1.2 Global intangible low-tax income, net ​ .3 ​ (.2) ​ 2.0 ​ (.1) Nondeductible expenses ​ .4 ​ .2 ​ 1.0 ​ .6 Other, net ​ 1.0 ​ .2 ​ 1.2 ​ (1.1) Income tax expense (benefit) ​ $ 1.2 ​ $ (8.7) ​ $ 34.3 ​ $ (19.7) ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Comprehensive provision for income taxes allocable to: ​ ​ ​ ​ Net income (loss) ​ $ 1.2 ​ $ (8.7) ​ $ 34.3 ​ $ (19.7) Other comprehensive income (loss): ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Pension plans ​ ​ 1.0 ​ ​ .1 ​ ​ 3.1 ​ ​ .7 OPEB plans ​ ​ (.1) ​ ​ (.1) ​ ​ (.1) ​ ​ (.1) Total ​ $ 2.1 ​ $ (8.7) ​ $ 37.3 ​ $ (19.1) ​ The amount shown in the preceding table of our income tax rate reconciliation for non-U.S. tax rates represents the result determined by multiplying the pre-tax earnings or losses of each of our non-U.S. subsidiaries by the difference between the applicable statutory income tax rate for each non-U.S. jurisdiction and the U.S. federal statutory tax rate. The amount shown on such table for incremental net tax benefit on earnings and losses of U.S. and non-U.S. companies includes, as applicable, (i) deferred income taxes (or deferred income tax benefits) associated with the current-year earnings (losses) of all of our non-U.S. subsidiaries and (ii) current U.S. income taxes (or current income tax benefit), including U.S. personal holding company tax, as applicable, attributable to current-year income (losses) of one of our non-U.S. subsidiaries, which subsidiary is treated as a dual resident for U.S. income tax purposes, to the extent the current-year income (losses) of such subsidiary is subject to U.S. income tax under the U.S. dual-resident provisions of the Internal Revenue Code. Tax authorities are examining certain of our U.S. and non-U.S. tax returns and may propose tax deficiencies, including penalties and interest. We believe we have adequate accruals for additional taxes and related interest expense which could ultimately result from tax examinations. We believe the ultimate disposition of tax examinations should not have a material adverse effect on our consolidated financial position, results of operations or liquidity. We currently estimate that our unrecognized tax benefits will not change materially during the next twelve months.

Stockholders' Equity

Stockholders' Equity	9 Months Ended
	Sep. 30, 2023
Equity [Abstract]
Stockholders' equity	Note 11 - Stockholders’ equity: Changes in accumulated other comprehensive loss are presented in the table below. See Note 9 for discussion of our defined benefit pension plans. ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Three months ended ​ Nine months ended ​ ​ September 30, ​ September 30, ​ 2022 2023 2022 2023 ​ ​ (In millions) Accumulated other comprehensive loss, net of tax: ​ ​ ​ ​ Currency translation: ​ ​ ​ ​ Balance at beginning of period ​ $ (270.1) ​ $ (281.9) ​ $ (240.4) ​ $ (269.2) Other comprehensive loss ​ (25.9) ​ (1.4) ​ (55.6) ​ (14.1) Balance at end of period ​ $ (296.0) ​ $ (283.3) ​ $ (296.0) ​ $ (283.3) ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Defined benefit pension plans: ​ ​ ​ ​ Balance at beginning of period ​ $ (158.6) ​ $ (61.1) ​ $ (163.3) ​ $ (63.1) Other comprehensive income - amortization ​ 2.2 ​ .4 ​ 6.9 ​ 1.5 Plan settlement ​ ​ - ​ ​ - ​ ​ - ​ ​ .9 Balance at end of period ​ $ (156.4) ​ $ (60.7) ​ $ (156.4) ​ $ (60.7) ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ OPEB plans: ​ ​ ​ ​ Balance at beginning of period ​ $ (.5) ​ $ .7 ​ $ (.4) ​ $ .8 Other comprehensive loss - amortization ​ (.1) ​ ​ (.1) ​ (.2) ​ (.2) Balance at end of period ​ $ (.6) ​ $ .6 ​ $ (.6) ​ $ .6 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Total accumulated other comprehensive loss: ​ ​ ​ ​ Balance at beginning of period ​ $ (429.2) ​ $ (342.3) ​ $ (404.1) ​ $ (331.5) Other comprehensive loss ​ (23.8) ​ (1.1) ​ (48.9) ​ (11.9) Balance at end of period ​ $ (453.0) ​ $ (343.4) ​ $ (453.0) ​ $ (343.4) ​ ​ Our board of directors has previously authorized the repurchase of up to 2.0 million shares of our common stock in open market transactions, including block purchases, or in privately-negotiated transactions at unspecified prices and over an unspecified period of time. We may repurchase our common stock from time to time as market conditions permit. The stock repurchase program does not include specific price targets or timetables and may be suspended at any time. Depending on market conditions, we may terminate the program prior to its completion. We use cash on hand or other sources of liquidity to acquire the shares. Repurchased shares are added to our treasury and subsequently cancelled upon approval of the board of directors. ​ During the first nine months of 2022, we acquired and cancelled and 323,814 shares previously held as treasury stock, respectively. At September 30, 2023, 1,017,518 shares are available for repurchase under this stock repurchase program.

Commitments and Contingencies

Commitments and Contingencies	9 Months Ended
	Sep. 30, 2023
Commitments And Contingencies Disclosure [Abstract]
Commitments and Contingencies	Note 12 - Commitments and contingencies: We are involved in various environmental, contractual, product liability, patent (or intellectual property), employment and other claims and disputes incidental to our business. At least quarterly our management discusses and evaluates the status of any pending litigation to which we are a party. The factors considered in such evaluation include, among other things, the nature of such pending cases, the status of such pending cases, the advice of legal counsel and our experience in similar cases (if any). Based on such evaluation, we make a determination as to whether we believe (i) it is probable a loss has been incurred, and if so if the amount of such loss (or a range of loss) is reasonably estimable, or (ii) it is reasonably possible but not probable a loss has been incurred, and if so if the amount of such loss (or a range of loss) is reasonably estimable, or (iii) the probability a loss has been incurred is remote. We have not accrued any amounts for litigation matters because it is not reasonably possible we have incurred a loss that would be material to our consolidated financial statements, results of operations or liquidity.

Financial Instruments

Financial Instruments	9 Months Ended
	Sep. 30, 2023
Fair Value Disclosures [Abstract]
Financial Instruments	Note 13 - Financial instruments: See Note 4 for information on how we determine fair value of our marketable securities. The following table presents the financial instruments that are not carried at fair value but which require fair value disclosure: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ December 31, 2022 September 30, 2023 ​ ​ Carrying ​ Fair ​ Carrying ​ Fair ​ ​ amount ​ value ​ amount ​ value ​ ​ (In millions) Cash, cash equivalents and restricted cash ​ $ 334.6 ​ $ 334.6 ​ $ 161.8 ​ $ 161.8 Long-term debt - Fixed rate Senior Notes ​ 424.1 ​ 374.2 ​ 422.5 ​ 385.0 ​ At September 30, 2023, the estimated market price of our Senior Notes was €908 per €1,000 principal amount. The fair value of our Senior Notes was based on quoted market prices; however, these quoted market prices represented Level 2 inputs because the markets in which the Senior Notes trade were not active. Due to their near-term maturities, the carrying amounts of accounts receivable and accounts payable are considered equivalent to fair value. See Notes 2 and 6.

Other operating income (expense

Other operating income (expense), net	9 Months Ended
	Sep. 30, 2023
Other Income and Expenses [Abstract]
Other operating income (expense), net:	Note 14 - Other operating income (expense), net: On August 24, 2020, LPC temporarily halted production due to Hurricane Laura. Although storm damage to core processing facilities was not extensive, a variety of factors, including loss of utilities and limited access and availability of employees and raw materials, prevented the resumption of operations until September 25, 2020. The majority of our losses from property damage and our share of LPC’s lost production and other costs resulting from the disruption of operations, were covered by insurance. We recognized an aggregate gain of $2.5 million ( $1.7 million, $.5 million and $.3 million in the first, second and third quarters of 2023, respectively) and a gain of $2.7 million in the third quarter of 2022 related to our business interruption claim. These gains are included in other operating expense, net on our Condensed Consolidated Statement of Operations.

Restructuring Costs

Restructuring Costs	9 Months Ended
	Sep. 30, 2023
Restructuring Costs [Abstract]
Restructuring Costs	Note 15 - Restructuring costs As part of overall cost saving measures to improve our long-term cost structure, during the third quarter of 2023 we began implementing certain voluntary and involuntary workforce reductions. A substantial portion of our workforce reductions are expected to be accomplished through voluntary programs, for which eligible workforce reduction costs are recognized at the time both the employee and employer are irrevocably committed to the terms of the separation. These workforce reductions will impact approximately 100 individuals. To date expenses related to these initiatives are not significant due to the early stages of the reductions; however, we currently expect to recognize a $6 million charge in the fourth quarter of 2023 related to workforce reductions we will implement during the quarter, most of which is expected to be classified in selling, general and administrative expense. The majority of cash payments are also expected to be completed by the first quarter of 2024.

Organization and basis of pre_2

Organization and basis of presentation: (Policies)	9 Months Ended
	Sep. 30, 2023
Accounting Policies [Abstract]
Organization	Organization
Basis of Presentation	Basis of presentation Unless otherwise indicated, references in this report to “we,” “us” or “our” refer to Kronos Worldwide, Inc. and its subsidiaries (NYSE: KRO) taken as a whole.
Commitments and Contingencies	We are involved in various environmental, contractual, product liability, patent (or intellectual property), employment and other claims and disputes incidental to our business. At least quarterly our management discusses and evaluates the status of any pending litigation to which we are a party. The factors considered in such evaluation include, among other things, the nature of such pending cases, the status of such pending cases, the advice of legal counsel and our experience in similar cases (if any). Based on such evaluation, we make a determination as to whether we believe (i) it is probable a loss has been incurred, and if so if the amount of such loss (or a range of loss) is reasonably estimable, or (ii) it is reasonably possible but not probable a loss has been incurred, and if so if the amount of such loss (or a range of loss) is reasonably estimable, or (iii) the probability a loss has been incurred is remote. We have not accrued any amounts for litigation matters because it is not reasonably possible we have incurred a loss that would be material to our consolidated financial statements, results of operations or liquidity.

Accounts and Other Receivable_2

Accounts and Other Receivables, Net (Tables)	9 Months Ended
	Sep. 30, 2023
Receivables [Abstract]
Accounts and Other Receivables, Net	​ ​ ​ ​ ​ ​ ​ ​ ​ ​ December 31, ​ September 30, ​ 2022 2023 ​ ​ (In millions) Trade receivables ​ $ 220.3 ​ $ 282.2 Recoverable VAT and other receivables ​ 28.5 ​ 21.1 Receivables from affiliates, other ​ ​ 2.7 ​ ​ .5 Refundable income taxes ​ 7.1 ​ .1 Allowance for doubtful accounts ​ (3.5) ​ (4.1) Total ​ $ 255.1 ​ $ 299.8 ​

Inventories, Net (Tables)

Inventories, Net (Tables)	9 Months Ended
	Sep. 30, 2023
Inventory Disclosure [Abstract]
Schedule of Inventories, Net	​ ​ ​ ​ ​ ​ ​ ​ ​ ​ December 31, ​ September 30, ​ 2022 2023 ​ ​ (In millions) Raw materials ​ $ 145.3 ​ $ 132.6 Work in process ​ 32.0 ​ 32.6 Finished products ​ 349.9 ​ 246.2 Supplies ​ 81.5 ​ 86.4 Total ​ $ 608.7 ​ $ 497.8 ​

Marketable Securities (Tables)

Marketable Securities (Tables)	9 Months Ended
	Sep. 30, 2023
Investments Debt And Equity Securities [Abstract]
Classification of Marketable Securities	​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Fair value ​ ​ ​ ​ ​ ​ ​ ​ measurement ​ Market ​ Cost ​ Unrealized Marketable security level value basis loss ​ ​ ​ (In millions) December 31, 2022: ​ ​ ​ Valhi common stock 1 ​ $ 3.2 ​ $ 3.2 ​ $ - ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ September 30, 2023: ​ ​ ​ ​ ​ Valhi common stock 1 ​ $ 1.9 ​ $ 3.2 ​ $ (1.3)

Long-Term Debt (Tables)

Long-Term Debt (Tables)	9 Months Ended
	Sep. 30, 2023
Debt Disclosure [Abstract]
Components of Long Term Debt	​ ​ ​ ​ ​ ​ ​ ​ ​ ​ December 31, ​ September 30, ​ 2022 2023 ​ ​ (In millions) Kronos International, Inc. 3.75% Senior Notes ​ $ 424.1 ​ $ 422.5 Other ​ 1.1 ​ .7 Total debt ​ 425.2 ​ 423.2 Less current maturities ​ 1.1 ​ .7 Total long-term debt ​ $ 424.1 ​ $ 422.5

Accounts payable and accrued _2

Accounts payable and accrued liabilities (Tables)	9 Months Ended
	Sep. 30, 2023
Payables And Accruals [Abstract]
Components of Accounts Payable and Accrued Liabilities	​ ​ ​ ​ ​ ​ ​ ​ ​ ​ December 31, ​ September 30, ​ 2022 2023 ​ ​ (In millions) Accounts payable ​ $ 177.2 ​ $ 117.9 Accrued sales discounts and rebates ​ 25.6 ​ 18.2 Employee benefits ​ 22.9 ​ 26.4 Payables to affiliates: ​ ​ ​ ​ ​ ​ LPC ​ ​ 17.1 ​ ​ 20.0 NL Industries, Inc. ​ ​ - ​ ​ .9 Income taxes payable to Valhi ​ ​ 5.8 ​ ​ 13.6 Operating lease liabilities ​ 3.8 ​ 3.8 Other ​ 59.9 ​ 45.6 Total ​ $ 312.3 ​ $ 246.4 ​

Other noncurrent liabilities (T

Other noncurrent liabilities (Tables)	9 Months Ended
	Sep. 30, 2023
Other Liabilities Disclosure [Abstract]
Components of Other Noncurrent Liabilities	​ ​ ​ ​ ​ ​ ​ ​ ​ December 31, ​ September 30, ​ 2022 2023 ​ ​ (In millions) Accrued postretirement benefits ​ $ 5.9 ​ $ 6.0 Employee benefits ​ 4.8 ​ 4.7 Other ​ 9.8 ​ 10.0 Total ​ $ 20.5 ​ $ 20.7 ​

Revenue Recognition (Tables)

Revenue Recognition (Tables)	9 Months Ended
	Sep. 30, 2023
Revenue From Contract With Customer [Abstract]
Disaggregation of Net Sales by Place of Manufacture and to Location of Customer	​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Three months ended ​ Nine months ended ​ ​ September 30, ​ September 30, ​ 2022 2023 2022 2023 ​ ​ (In millions) Net sales - point of origin: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ United States ​ $ 330.3 ​ $ 250.6 ​ $ 980.4 ​ $ 739.8 Germany ​ 213.5 ​ 182.3 ​ 762.0 ​ 561.9 Canada ​ 105.1 ​ 93.0 ​ 313.1 ​ 267.8 Belgium ​ 76.0 ​ 49.3 ​ 256.3 ​ 163.6 Norway ​ 64.7 ​ 40.7 ​ 211.1 ​ 187.9 Eliminations ​ (330.0) ​ (219.0) ​ (935.1) ​ (654.6) Total ​ $ 459.6 ​ $ 396.9 ​ $ 1,587.8 ​ $ 1,266.4 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Net sales - point of destination: ​ ​ ​ ​ Europe ​ $ 197.5 ​ $ 179.9 ​ $ 731.6 ​ $ 580.0 North America ​ 182.5 ​ 165.1 ​ 558.4 ​ 466.7 Other ​ 79.6 ​ 51.9 ​ 297.8 ​ 219.7 Total ​ $ 459.6 ​ $ 396.9 ​ $ 1,587.8 ​ $ 1,266.4 ​

Employee benefit plans (Tables)

Employee benefit plans (Tables)	9 Months Ended
	Sep. 30, 2023
Compensation And Retirement Disclosure [Abstract]
Components of Net Periodic Benefit Cost	​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Three months ended ​ Nine months ended ​ ​ September 30, ​ September 30, ​ 2022 2023 2022 2023 ​ ​ (In millions) Net periodic pension cost (income): ​ ​ ​ ​ Service cost ​ $ 2.8 ​ $ 1.6 ​ $ 8.7 ​ $ 4.7 Interest cost ​ 2.7 ​ 5.2 ​ 8.3 ​ 15.4 Expected return on plan assets ​ (3.1) ​ (4.8) ​ (9.2) ​ (14.4) Recognized actuarial losses ​ 3.2 ​ .6 ​ 10.0 ​ 1.8 Settlements ​ ​ - ​ ​ - ​ ​ - ​ ​ 1.3 Total ​ $ 5.6 ​ $ 2.6 ​ $ 17.8 ​ $ 8.8

Income Taxes (Tables)

Income Taxes (Tables)	9 Months Ended
	Sep. 30, 2023
Income Tax Disclosure [Abstract]
Components of Income Taxes and Comprehensive Provision for Income Taxes Allocation	​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Three months ended ​ Nine months ended ​ ​ September 30, ​ September 30, ​ 2022 2023 2022 2023 ​ ​ (In millions) Expected tax expense (benefit), at U.S. federal statutory ​ $ 4.7 ​ $ (6.1) ​ $ 33.3 ​ $ (13.3) Non-U.S. tax rates ​ (1.2) ​ (2.0) ​ 2.0 ​ (4.6) Incremental net tax benefit on earnings and losses of U.S. ​ (.2) ​ (1.2) ​ (.7) ​ (2.4) Valuation allowance, net ​ (3.8) ​ .4 ​ (4.5) ​ 1.2 Global intangible low-tax income, net ​ .3 ​ (.2) ​ 2.0 ​ (.1) Nondeductible expenses ​ .4 ​ .2 ​ 1.0 ​ .6 Other, net ​ 1.0 ​ .2 ​ 1.2 ​ (1.1) Income tax expense (benefit) ​ $ 1.2 ​ $ (8.7) ​ $ 34.3 ​ $ (19.7) ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Comprehensive provision for income taxes allocable to: ​ ​ ​ ​ Net income (loss) ​ $ 1.2 ​ $ (8.7) ​ $ 34.3 ​ $ (19.7) Other comprehensive income (loss): ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Pension plans ​ ​ 1.0 ​ ​ .1 ​ ​ 3.1 ​ ​ .7 OPEB plans ​ ​ (.1) ​ ​ (.1) ​ ​ (.1) ​ ​ (.1) Total ​ $ 2.1 ​ $ (8.7) ​ $ 37.3 ​ $ (19.1)

Stockholders' Equity (Tables)

Stockholders' Equity (Tables)	9 Months Ended
	Sep. 30, 2023
Equity [Abstract]
Schedule of Changes in Accumulated Other Comprehensive Loss	​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Three months ended ​ Nine months ended ​ ​ September 30, ​ September 30, ​ 2022 2023 2022 2023 ​ ​ (In millions) Accumulated other comprehensive loss, net of tax: ​ ​ ​ ​ Currency translation: ​ ​ ​ ​ Balance at beginning of period ​ $ (270.1) ​ $ (281.9) ​ $ (240.4) ​ $ (269.2) Other comprehensive loss ​ (25.9) ​ (1.4) ​ (55.6) ​ (14.1) Balance at end of period ​ $ (296.0) ​ $ (283.3) ​ $ (296.0) ​ $ (283.3) ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Defined benefit pension plans: ​ ​ ​ ​ Balance at beginning of period ​ $ (158.6) ​ $ (61.1) ​ $ (163.3) ​ $ (63.1) Other comprehensive income - amortization ​ 2.2 ​ .4 ​ 6.9 ​ 1.5 Plan settlement ​ ​ - ​ ​ - ​ ​ - ​ ​ .9 Balance at end of period ​ $ (156.4) ​ $ (60.7) ​ $ (156.4) ​ $ (60.7) ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ OPEB plans: ​ ​ ​ ​ Balance at beginning of period ​ $ (.5) ​ $ .7 ​ $ (.4) ​ $ .8 Other comprehensive loss - amortization ​ (.1) ​ ​ (.1) ​ (.2) ​ (.2) Balance at end of period ​ $ (.6) ​ $ .6 ​ $ (.6) ​ $ .6 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Total accumulated other comprehensive loss: ​ ​ ​ ​ Balance at beginning of period ​ $ (429.2) ​ $ (342.3) ​ $ (404.1) ​ $ (331.5) Other comprehensive loss ​ (23.8) ​ (1.1) ​ (48.9) ​ (11.9) Balance at end of period ​ $ (453.0) ​ $ (343.4) ​ $ (453.0) ​ $ (343.4)

Financial Instruments (Tables)

Financial Instruments (Tables)	9 Months Ended
	Sep. 30, 2023
Fair Value Disclosures [Abstract]
Financial Instruments not Carried at Fair Value but which Require Fair Value Disclosure	​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ December 31, 2022 September 30, 2023 ​ ​ Carrying ​ Fair ​ Carrying ​ Fair ​ ​ amount ​ value ​ amount ​ value ​ ​ (In millions) Cash, cash equivalents and restricted cash ​ $ 334.6 ​ $ 334.6 ​ $ 161.8 ​ $ 161.8 Long-term debt - Fixed rate Senior Notes ​ 424.1 ​ 374.2 ​ 422.5 ​ 385.0

Organization and basis of pre_3

Organization and basis of presentation: - Additional Information (Detail) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
Organization And Basis Of Presentation [Line Items]
Cost of sales	$ 362.5	$ 375.6	$ 1,157.1	$ 1,234
Income taxes paid, net			$ 15.2	$ 32.2
Valhi Inc | Parent Company
Organization And Basis Of Presentation [Line Items]
Parent company ownership interest	50%		50%
Valhi Inc | NL Industries Inc.
Organization And Basis Of Presentation [Line Items]
Ownership percentage in company	83%		83%
NL Industries Inc. | Parent Company
Organization And Basis Of Presentation [Line Items]
Parent company ownership interest	31%		31%
Contran
Organization And Basis Of Presentation [Line Items]
Controlling interest description			Consequently, at September 30, 2023, Ms. Simmons and the Family Trust may be deemed to control Contran, and therefore may be deemed to indirectly control the wholly-owned subsidiary of Contran, Valhi, NL and us.
Contran | Valhi Inc
Organization And Basis Of Presentation [Line Items]
Ownership percentage of parent company held by related party	91%		91%

Accounts and Other Receivable_3

Accounts and Other Receivables, Net - Accounts and Other Receivables, Net (Detail) - USD ($) $ in Millions	Sep. 30, 2023	Dec. 31, 2022
Accounts Notes And Loans Receivable [Line Items]
Allowance for doubtful accounts	$ (4.1)	$ (3.5)
Total	299.8	255.1
Trade receivables
Accounts Notes And Loans Receivable [Line Items]
Accounts and other receivables	282.2	220.3
Recoverable VAT and other receivables
Accounts Notes And Loans Receivable [Line Items]
Accounts and other receivables	21.1	28.5
Other
Accounts Notes And Loans Receivable [Line Items]
Receivables from affiliates	0.5	2.7
Refundable income taxes
Accounts Notes And Loans Receivable [Line Items]
Refundable income taxes	$ 0.1	$ 7.1

Inventories, Net - Schedule of

Inventories, Net - Schedule of Inventories, Net (Detail) - USD ($) $ in Millions	Sep. 30, 2023	Dec. 31, 2022
Inventory Disclosure [Abstract]
Raw materials	$ 132.6	$ 145.3
Work in process	32.6	32
Finished products	246.2	349.9
Supplies	86.4	81.5
Total	$ 497.8	$ 608.7

Marketable Securities - Classif

Marketable Securities - Classification of Marketable Securities (Detail) - USD ($) $ in Millions	9 Months Ended
	Sep. 30, 2023	Dec. 31, 2022
Marketable Securities [Line Items]
Market value	$ 1.9	$ 3.2
Level 1 | Common stock | Valhi
Marketable Securities [Line Items]
Market value	1.9	3.2
Cost basis	3.2	$ 3.2
Unrealized gain (loss)	$ (1.3)

Marketable Securities - Additio

Marketable Securities - Additional Information (Detail) - Valhi Inc - Common stock - $ / shares	Sep. 30, 2023	Dec. 31, 2022
Marketable Securities [Line Items]
Investments in publicly-traded shares	144,000	144,000
Quoted market price of per share	$ 13.26	$ 22

Long-Term Debt - Components of

Long-Term Debt - Components of Long-Term Debt (Detail) € in Millions, $ in Millions	Sep. 30, 2023 USD ($)	Sep. 30, 2023 EUR (€)	Dec. 31, 2022 USD ($)
Debt Instrument [Line Items]
Kronos International, Inc. 3.75% Senior Notes	$ 422.5		$ 424.1
Other	0.7		1.1
Total debt	423.2		425.2
Less current maturities	0.7		1.1
Total long-term debt	422.5		424.1
Kronos International, Inc | 3.75% Senior Notes
Debt Instrument [Line Items]
Kronos International, Inc. 3.75% Senior Notes	$ 422.5	€ 400	$ 424.1

Long-Term Debt - Senior Notes -

Long-Term Debt - Senior Notes - Additional Information (Detail) € in Millions, $ in Millions	9 Months Ended
	Sep. 30, 2023 USD ($)	Sep. 30, 2023 EUR (€)	Dec. 31, 2022 USD ($)
Debt Instrument [Line Items]
Aggregate principal amount outstanding	$ 422.5		$ 424.1
Kronos International, Inc | 3.75% Senior Secured Notes due September 15, 2025
Debt Instrument [Line Items]
Debt instrument interest rate	3.75%	3.75%
Debt instrument maturity date	Sep. 15, 2025
Aggregate principal amount outstanding	$ 422.5	€ 400	$ 424.1
Unamortized debt issuance costs	$ 1.7

Long-Term Debt - Revolving Cred

Long-Term Debt - Revolving Credit Facilities - Additional Information (Detail) - Global Revolver $ in Millions	9 Months Ended
	Sep. 30, 2023 USD ($)
Debt Instrument [Line Items]
Repayments of lines of credit	$ 0
Borrowings under credit facility during the period	0
Maximum borrowing capacity	225
Amount available for Borrowing	$ 225

Accounts payable and accrued _3

Accounts payable and accrued liabilities - Components of Accounts Payable and Accrued Liabilities (Detail) - USD ($) $ in Millions	Sep. 30, 2023	Dec. 31, 2022
Accounts Payable And Accrued Liabilities [Line Items]
Accounts payable	$ 117.9	$ 177.2
Accrued sales discounts and rebates	18.2	25.6
Employee benefits	26.4	22.9
Operating lease liabilities	$ 3.8	$ 3.8
Operating Lease, Liability, Current, Statement of Financial Position [Extensible Enumeration]	Total	Total
Other	$ 45.6	$ 59.9
Total	246.4	312.3
LPC
Accounts Payable And Accrued Liabilities [Line Items]
Current payable to affiliate	20	17.1
NL Industries Inc.
Accounts Payable And Accrued Liabilities [Line Items]
Current payable to affiliate	0.9
Valhi | Income taxes
Accounts Payable And Accrued Liabilities [Line Items]
Current payable to affiliate	$ 13.6	$ 5.8

Other noncurrent liabilities -

Other noncurrent liabilities - Components of Other Noncurrent Liabilities (Detail) - USD ($) $ in Millions	Sep. 30, 2023	Dec. 31, 2022
Other Liabilities Disclosure [Abstract]
Accrued postretirement benefits	$ 6	$ 5.9
Employee benefits	4.7	4.8
Other	10	9.8
Total	$ 20.7	$ 20.5

Revenue Recognition - Disaggreg

Revenue Recognition - Disaggregation of Net Sales by Place of Manufacture and to Location of Customer (Detail) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
Entity Wide Information Revenue From External Customer [Line Items]
Net sales	$ 396.9	$ 459.6	$ 1,266.4	$ 1,587.8
Point of origin
Entity Wide Information Revenue From External Customer [Line Items]
Net sales	396.9	459.6	1,266.4	1,587.8
Point of origin | Reportable Geographical Components | United States
Entity Wide Information Revenue From External Customer [Line Items]
Net sales	250.6	330.3	739.8	980.4
Point of origin | Reportable Geographical Components | Germany
Entity Wide Information Revenue From External Customer [Line Items]
Net sales	182.3	213.5	561.9	762
Point of origin | Reportable Geographical Components | Canada
Entity Wide Information Revenue From External Customer [Line Items]
Net sales	93	105.1	267.8	313.1
Point of origin | Reportable Geographical Components | Belgium
Entity Wide Information Revenue From External Customer [Line Items]
Net sales	49.3	76	163.6	256.3
Point of origin | Reportable Geographical Components | Norway
Entity Wide Information Revenue From External Customer [Line Items]
Net sales	40.7	64.7	187.9	211.1
Point of origin | Eliminations
Entity Wide Information Revenue From External Customer [Line Items]
Net sales	(219)	(330)	(654.6)	(935.1)
Point of destination
Entity Wide Information Revenue From External Customer [Line Items]
Net sales	396.9	459.6	1,266.4	1,587.8
Point of destination | Europe
Entity Wide Information Revenue From External Customer [Line Items]
Net sales	179.9	197.5	580	731.6
Point of destination | North America
Entity Wide Information Revenue From External Customer [Line Items]
Net sales	165.1	182.5	466.7	558.4
Point of destination | Other
Entity Wide Information Revenue From External Customer [Line Items]
Net sales	$ 51.9	$ 79.6	$ 219.7	$ 297.8

Employee benefit plans - Compon

Employee benefit plans - Components of Net Periodic Benefit Cost (Detail) - USD ($) $ in Millions	3 Months Ended			9 Months Ended
	Sep. 30, 2023	Jun. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
Defined Benefit Plan Disclosure [Line Items]
Settlements		$ 1.3
Defined benefit pension plans
Defined Benefit Plan Disclosure [Line Items]
Service cost	$ 1.6		$ 2.8	$ 4.7	$ 8.7
Interest cost	5.2		2.7	15.4	8.3
Expected return on plan assets	(4.8)		(3.1)	(14.4)	(9.2)
Recognized actuarial losses	0.6		3.2	1.8	10
Settlements	0		0	1.3	0
Total	$ 2.6		$ 5.6	$ 8.8	$ 17.8

Employee benefit plans - Additi

Employee benefit plans - Additional Information (Detail) - USD ($) $ in Millions	3 Months Ended			9 Months Ended
	Sep. 30, 2023	Jun. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022	Dec. 31, 2023
Defined Benefit Plan Disclosure [Line Items]
Settlements		$ 1.3
Expected contributions for pension plans in 2023						$ 17
Pension Plans Defined Benefit [Member]
Defined Benefit Plan Disclosure [Line Items]
Settlements	$ 0		$ 0	$ 1.3	$ 0

Income Taxes - Components of In

Income Taxes - Components of Income Taxes and Comprehensive Provision for Income Taxes Allocation (Detail) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
Schedule Of Income Tax [Line Items]
Expected tax expense (benefit), at U.S. federal statutory income tax rate of 21%	$ (6.1)	$ 4.7	$ (13.3)	$ 33.3
U.S. Federal statutory income tax rate			21%
Non-U.S. tax rates	(2)	(1.2)	$ (4.6)	2
Incremental net tax benefit on earnings and losses of U.S. and non-U.S. companies	(1.2)	(0.2)	(2.4)	(0.7)
Valuation allowance, net	0.4	(3.8)	1.2	(4.5)
Global intangible low-tax income, net	(0.2)	0.3	(0.1)	2
Nondeductible expenses	0.2	0.4	0.6	1
Other, net	0.2	1	(1.1)	1.2
Income tax expense (benefit)	(8.7)	1.2	(19.7)	34.3
Comprehensive provision for income taxes allocable to:
Net income (loss)	(8.7)	1.2	(19.7)	34.3
Other comprehensive income (loss):
Total	(8.7)	2.1	(19.1)	37.3
Defined benefit pension plans
Other comprehensive income (loss):
Pension plans	0.1	1	0.7	3.1
Other postretirement benefit plans
Other comprehensive income (loss):
Pension plans	$ (0.1)	$ (0.1)	$ (0.1)	$ (0.1)

Stockholders' Equity - Addition

Stockholders' Equity - Additional Information (Detail) - USD ($) $ in Millions	3 Months Ended				6 Months Ended	9 Months Ended
	Jun. 30, 2023	Mar. 31, 2023	Dec. 31, 2022	Mar. 31, 2022	Jun. 30, 2023	Sep. 30, 2023	Sep. 30, 2022
Accumulated Other Comprehensive Income Loss [Line Items]
Number of shares authorized for repurchase						2,000,000
Aggregate purchase price						$ 2.8	$ 1.1
Shares available for repurchase under the plan						1,017,518
Common stock
Accumulated Other Comprehensive Income Loss [Line Items]
Stock repurchased and acquired in market transactions	154,018	159,796	143,897				73,881
Stock repurchased and cancelled in market transactions							73,881
Treasury Stock, Common
Accumulated Other Comprehensive Income Loss [Line Items]
Stock repurchased and cancelled in market transactions	323,814	133,897
Aggregate purchase price			$ 1.4	$ 1.1	$ 2.8	$ 2.8	$ 1.1

Stockholders' Equity - Schedule

Stockholders' Equity - Schedule of Changes in Accumulated Other Comprehensive Loss (Detail) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
Accumulated Other Comprehensive Income Loss [Line Items]
Beginning Balance	$ 876.5	$ 903.6	$ 957.2	$ 870.2
Ending Balance	833.2	878.9	833.2	878.9
Currency Translation
Accumulated Other Comprehensive Income Loss [Line Items]
Beginning Balance	(281.9)	(270.1)	(269.2)	(240.4)
Other comprehensive income (loss)	(1.4)	(25.9)	(14.1)	(55.6)
Ending Balance	(283.3)	(296)	(283.3)	(296)
Accumulated Defined Benefit Plans Adjustment | Defined benefit pension plans
Accumulated Other Comprehensive Income Loss [Line Items]
Beginning Balance	(61.1)	(158.6)	(63.1)	(163.3)
Other comprehensive income (loss)	0.4	2.2	1.5	6.9
Plan settlement			0.9
Ending Balance	(60.7)	(156.4)	(60.7)	(156.4)
Accumulated Defined Benefit Plans Adjustment | OPEB Plans
Accumulated Other Comprehensive Income Loss [Line Items]
Beginning Balance	0.7	(0.5)	0.8	(0.4)
Other comprehensive income (loss)	(0.1)	(0.1)	(0.2)	(0.2)
Ending Balance	0.6	(0.6)	0.6	(0.6)
Total Accumulated Other Comprehensive Loss
Accumulated Other Comprehensive Income Loss [Line Items]
Beginning Balance	(342.3)	(429.2)	(331.5)	(404.1)
Other comprehensive income (loss)	(1.1)	(23.8)	(11.9)	(48.9)
Ending Balance	$ (343.4)	$ (453)	$ (343.4)	$ (453)

Financial Instruments - Additio

Financial Instruments - Additional Information (Detail) - Senior Notes	Sep. 30, 2023 EUR (€)
Financial Instrument At Fair Value [Line Items]
Debt instrument base principal amount	€ 1,000
Debt instrument estimated market price per 1000 principal amount	€ 908

Financial Instruments - Financi

Financial Instruments - Financial Instruments not Carried at Fair Value but which Require Fair Value Disclosure (Detail) - USD ($) $ in Millions	Sep. 30, 2023	Dec. 31, 2022	Sep. 30, 2022	Dec. 31, 2021
Fair Value Disclosures [Abstract]
Cash, cash equivalents and restricted cash, Carrying amount	$ 161.8	$ 334.6	$ 344.4	$ 412.6
Long-term debt - Fixed rate Senior Notes, Carrying amount	422.5	424.1
Cash, cash equivalents and restricted cash, Fair value	161.8	334.6
Long-term debt - Fixed rate Senior Notes, Fair value	$ 385	$ 374.2

Other operating income (expen_2

Other operating income (expense), net (Detail) - USD ($) $ in Millions	3 Months Ended				9 Months Ended
	Sep. 30, 2023	Jun. 30, 2023	Mar. 31, 2023	Sep. 30, 2022	Sep. 30, 2023
Other Income and Expenses [Abstract]
Insurance settlement gain	$ 0.3	$ 0.5	$ 1.7	$ 2.7	$ 2.5

Restructuring Costs (Detail)

Restructuring Costs (Detail) $ in Millions	3 Months Ended
	Dec. 31, 2023 USD ($)
Restructuring Costs [Abstract]
Restructuring Charges	$ 6