Kronos Worldwide (KRO) 10-Q 3 Aug 22 2022 Q2 Quarterly report Financial data

Document and Entity Information

Document and Entity Information - shares	6 Months Ended
	Jun. 30, 2022	Jul. 29, 2022
Cover [Abstract]
Document Type	10-Q
Document Quarterly Report	true
Document Period End Date	Jun. 30, 2022
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		115,470,027
Amendment Flag	false
Document Fiscal Year Focus	2022
Document Fiscal Period Focus	Q2
Entity Central Index Key	0001257640
Current Fiscal Year End Date	--12-31

CONDENSED CONSOLIDATED BALANCE

CONDENSED CONSOLIDATED BALANCE SHEETS (unaudited) - USD ($) $ in Millions	Jun. 30, 2022	Dec. 31, 2021
Current assets:
Cash and cash equivalents	$ 371.2	$ 406
Restricted cash	1.6	2.1
Accounts and other receivables, net	404.3	379.1
Inventories, net	435	432.3
Prepaid expenses and other	35.8	38.5
Total current assets	1,247.9	1,258
Other assets:
Investment in TiO2 manufacturing joint venture	106	101.9
Restricted cash	4.7	4.5
Marketable securities	6.5	4.2
Operating lease right-of-use assets	19.3	19.9
Deferred income taxes	93.9	106.8
Other	13.2	14.1
Total other assets	243.6	251.4
Property and equipment:
Land	41	43.9
Buildings	211.3	222.2
Equipment	1,070	1,122.1
Mining properties	116.6	129.6
Construction in progress	66.1	72.7
Gross property and equipment	1,505	1,590.5
Less accumulated depreciation and amortization	1,033	1,087.1
Net property and equipment	472	503.4
Total assets	1,963.5	2,012.8
Current liabilities:
Current maturities of long-term debt	1.4	1.4
Accounts payable and accrued liabilities	267.6	275.1
Income taxes	12.5	12.3
Total current liabilities	281.5	288.8
Noncurrent liabilities:
Long-term debt	415.8	449.8
Accrued pension costs	263.6	287.4
Payable to affiliate - income taxes	33.5	44.7
Operating lease liabilities	15.5	15.8
Deferred income taxes	25.4	28.1
Other	24.6	28
Total noncurrent liabilities	778.4	853.8
Stockholders' equity:
Common stock	1.2	1.2
Additional paid-in capital	1,394.2	1,395.4
Retained deficit	(62.6)	(122.1)
Accumulated other comprehensive loss	(429.2)	(404.1)
Treasury stock, at cost		(0.2)
Total stockholders' equity	903.6	870.2
Total liabilities and stockholders' equity	1,963.5	2,012.8
Commitments and contingencies (Notes 10 and 12)

CONDENSED CONSOLIDATED STATEMEN

CONDENSED CONSOLIDATED STATEMENTS OF INCOME (unaudited) - USD ($) shares in Millions, $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Income Statement [Abstract]
Net sales	$ 565.3	$ 478.6	$ 1,128.2	$ 943.6
Cost of sales	444.8	369.6	858.4	738.9
Gross margin	120.5	109	269.8	204.7
Selling, general and administrative expense	63.2	62.9	124.6	120.9
Other operating income:
Currency transactions, net	11.9	0.5	10.4
Other operating expense, net	(4)	(2.8)	(7.1)	(6)
Income from operations	65.2	43.8	148.5	77.8
Other income (expense):
Interest and dividend income	0.6	0.1	0.7	0.2
Marketable equity securities	2.3	0.5	2.4	1.3
Other components of net periodic pension and OPEB cost	(3.1)	(4.3)	(6.3)	(8.6)
Interest expense	(4.3)	(5.2)	(8.8)	(10.2)
Income before income taxes	60.7	34.9	136.5	60.5
Income tax expense	14.8	9.2	33.1	15.2
Net income	$ 45.9	$ 25.7	103.4	45.3
Net income - basic			57.5	19.6
Net income - diluted			$ 57.5	$ 19.6
Net income per basic share	$ 0.40	$ 0.22	$ 0.90	$ 0.39
Net income per diluted share	$ 0.40	$ 0.22	$ 0.90	$ 0.39
Weighted average shares outstanding - basic	115.5	115.5	115.5	115.5
Weighted average shares outstanding - diluted	115.5	115.5	115.5	115.5

CONDENSED CONSOLIDATED STATEM_2

CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (unaudited) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Net income	$ 45.9	$ 25.7	$ 103.4	$ 45.3
Other comprehensive income (loss), net of tax:
Currency translation	(36.3)	1.8	(29.7)	4
Total other comprehensive income, net	(34)	5.3	(25.1)	10.9
Comprehensive income	11.9	31	78.3	56.2
Defined Benefit Pension Plans
Other comprehensive income (loss), net of tax:
Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Adjustment Net Of Tax	$ 2.3	$ 3.5	4.7	7
OPEB
Other comprehensive income (loss), net of tax:
Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Adjustment Net Of Tax			$ (0.1)	$ (0.1)

CONDENSED CONSOLIDATED STATEM_3

CONDENSED CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY (unaudited) - USD ($) $ in Millions	Common stock	Additional paid-in capital	Retained deficit	Accumulated other comprehensive loss	Treasury stock	Total
Beginning Balance at Dec. 31, 2020	$ 1.2	$ 1,395.3	$ (151.8)	$ (448.2)		$ 796.5
Net income			45.3			45.3
Other comprehensive income, net of tax				10.9		10.9
Issuance of common stock		0.1				0.1
Dividends paid			(41.6)			(41.6)
Ending Balance at Jun. 30, 2021	1.2	1,395.4	(148.1)	(437.3)		811.2
Beginning Balance at Mar. 31, 2021	1.2	1,395.3	(153)	(442.6)		800.9
Net income			25.7			25.7
Other comprehensive income, net of tax				5.3		5.3
Issuance of common stock		0.1				0.1
Dividends paid			(20.8)			(20.8)
Ending Balance at Jun. 30, 2021	1.2	1,395.4	(148.1)	(437.3)		811.2
Beginning Balance at Dec. 31, 2021	1.2	1,395.4	(122.1)	(404.1)	$ (0.2)	870.2
Ending Balance at Mar. 31, 2022	1.2	1,395.2	(86.5)	(395.2)	(1.1)	913.6
Beginning Balance at Dec. 31, 2021	1.2	1,395.4	(122.1)	(404.1)	(0.2)	870.2
Net income			103.4			103.4
Other comprehensive income, net of tax				(25.1)		(25.1)
Issuance of common stock		0.1				0.1
Dividends paid			(43.9)			(43.9)
Treasury stock acquired					(1.1)	(1.1)
Treasury stock retired		(1.3)			1.3
Ending Balance at Jun. 30, 2022	1.2	1,394.2	(62.6)	(429.2)		903.6
Beginning Balance at Mar. 31, 2022	1.2	1,395.2	(86.5)	(395.2)	(1.1)	913.6
Net income			45.9			45.9
Other comprehensive income, net of tax				(34)		(34)
Issuance of common stock		0.1				0.1
Dividends paid			(22)			(22)
Treasury stock retired		(1.1)			$ 1.1
Ending Balance at Jun. 30, 2022	$ 1.2	$ 1,394.2	$ (62.6)	$ (429.2)		$ 903.6

CONDENSED CONSOLIDATED STATEM_4

CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (unaudited) - USD ($) $ in Millions	6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021
Cash flows from operating activities:
Net income	$ 103.4	$ 45.3
Depreciation	26	25.5
Amortization of operating lease right-of-use assets	2.4	3.3
Deferred income taxes	3.3	1.1
Benefit plan expense greater than cash funding	3.9	5.1
Marketable equity securities	(2.4)	(1.3)
Contributions to TiO2 manufacturing joint venture, net	(4.1)	(0.2)
Other, net	2.4	0.4
Change in assets and liabilities:
Accounts and other receivables, net	(58.6)	(30.7)
Inventories, net	(30.3)	84.4
Prepaid expenses	(0.4)	2.6
Accounts payable and accrued liabilities	(14.2)	(40.5)
Income taxes	3.5	(8.6)
Accounts with affiliates	13.7	(8.6)
Other, net	0.7	0.3
Net cash provided by (used in) operating activities	49.3	78.1
Cash flows from investing activities:
Capital expenditures	(30.5)	(21.2)
Proceeds from insurance settlement	0.1
Net cash used in investing activities	(30.4)	(21.2)
Cash flows from financing activities:
Payments on long-term debt	(0.3)	(0.4)
Deferred financing fees		(1.8)
Dividends paid	(43.9)	(41.6)
Treasury stock acquired	(1.1)
Net cash used in financing activities	(45.3)	(43.8)
Cash, cash equivalents and restricted cash - net change from:
Operating, investing and financing activities	(26.4)	13.1
Effect of currency exchange rate changes on cash	(8.7)	(4.9)
Balance at beginning of period	412.6	362
Balance at end of period	377.5	370.2
Cash paid for:
Interest, net of amount capitalized	8.3	9.2
Income taxes	25.3	31.3
Accrual for capital expenditures	$ 2.5	$ 2.2

Organization and Basis of Prese

Organization and Basis of Presentation	6 Months Ended
	Jun. 30, 2022
Organization Consolidation And Presentation Of Financial Statements [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	6 Months Ended
	Jun. 30, 2022
Receivables [Abstract]
Accounts and Other Receivables, Net	Note 2 - Accounts and other receivables, net: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ December 31, ​ June 30, ​ 2021 2022 ​ ​ (In millions) Trade receivables ​ $ 326.3 ​ $ 372.1 Recoverable VAT and other receivables ​ 32.4 ​ 22.9 Receivables from affiliates: ​ ​ ​ ​ ​ ​ Louisiana Pigment Company, L.P. (LPC) ​ ​ 15.8 ​ ​ 6.7 Other ​ ​ 2.6 ​ ​ 3.3 Refundable income taxes ​ 4.0 ​ 2.6 Allowance for doubtful accounts ​ (2.0) ​ (3.3) Total ​ $ 379.1 ​ $ 404.3 ​

Inventories, Net

Inventories, Net	6 Months Ended
	Jun. 30, 2022
Inventory Disclosure [Abstract]
Inventories, Net	Note 3 - Inventories, net: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ December 31, ​ June 30, ​ 2021 2022 ​ ​ (In millions) Raw materials ​ $ 76.3 ​ $ 108.9 Work in process ​ 30.4 ​ 28.6 Finished products ​ 245.6 ​ 220.2 Supplies ​ 80.0 ​ 77.3 Total ​ $ 432.3 ​ $ 435.0 ​

Marketable Securities

Marketable Securities	6 Months Ended
	Jun. 30, 2022
Investments Debt And Equity Securities [Abstract]
Marketable Securities	Note 4 - Marketable securities: Our marketable securities consist of investments in the publicly-traded shares of related parties: Valhi, NL and CompX International Inc. NL owns the majority of CompX’s outstanding common stock. All of 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. Any unrealized gains or losses on the securities are recognized in Other income (expense) - Marketable equity securities on our Condensed Consolidated Statements of Income. ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Fair value ​ ​ ​ ​ ​ ​ ​ ​ measurement ​ Market ​ Cost ​ Unrealized Marketable security level value basis gain ​ ​ ​ (In millions) December 31, 2021: ​ ​ ​ Valhi common stock 1 ​ $ 4.1 ​ $ 3.2 ​ $ .9 NL and CompX common stocks 1 ​ .1 ​ .1 ​ - Total ​ ​ ​ $ 4.2 ​ $ 3.3 ​ $ .9 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ June 30, 2022: ​ ​ ​ ​ ​ Valhi common stock 1 ​ $ 6.5 ​ $ 3.2 ​ $ 3.3 ​ At December 31, 2021 and June 30, 2022, we held approximately 144,000 shares of Valhi’s common stock. At the beginning of the second quarter of 2022 we held a nominal number of shares of NL and CompX common stocks. During the second quarter of 2022 we sold all of our shares of NL and CompX common stock to the respective issuer in two separate private transactions that were approved in advance by our independent directors (using a 10-day trailing average price per share to determine the purchase price) for an aggregate sales price of $.1 million. At December 31, 2021 and June 30, 2022, the per share quoted market price of Valhi’s common stock was $28.75 and $45.34, respectively. The Valhi common stock we own is subject to restrictions on resale pursuant to certain provisions of 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 receive dividends from Valhi on these shares when declared and paid.

Long-Term debt

Long-Term debt	6 Months Ended
	Jun. 30, 2022
Debt Disclosure [Abstract]
Long-Term Debt	Note 5 - Long-term debt: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ December 31, ​ June 30, ​ 2021 2022 ​ ​ (In millions) Kronos International, Inc. 3.75% Senior Notes ​ $ 448.8 ​ $ 415.1 Other ​ 2.4 ​ 2.1 Total debt ​ 451.2 ​ 417.2 Less current maturities ​ 1.4 ​ 1.4 Total long-term debt ​ $ 449.8 ​ $ 415.8 ​ Senior Notes Revolving credit facility borrowings Other

Accounts Payable and Accrued Li

Accounts Payable and Accrued Liabilities	6 Months Ended
	Jun. 30, 2022
Payables And Accruals [Abstract]
Accounts Payable and Accrued Liabilities	Note 6 - Accounts payable and accrued liabilities: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ December 31, ​ June 30, ​ 2021 2022 ​ ​ (In millions) Accounts payable ​ $ 143.6 ​ $ 137.9 Accrued sales discounts and rebates ​ 28.7 ​ 17.1 Employee benefits ​ 28.9 ​ 20.9 Payables to affiliates: ​ ​ ​ ​ ​ ​ LPC ​ ​ 17.3 ​ ​ 22.6 Income taxes payable to Valhi ​ ​ .9 ​ ​ 12.3 Operating lease liabilities ​ 3.7 ​ 3.5 Other ​ 52.0 ​ 53.3 Total ​ $ 275.1 ​ $ 267.6 ​

Other Noncurrent Liabilities

Other Noncurrent Liabilities	6 Months Ended
	Jun. 30, 2022
Other Liabilities Disclosure [Abstract]
Other Noncurrent Liabilities	Note 7 - Other noncurrent liabilities: ​ ​ ​ ​ ​ ​ ​ ​ ​ December 31, ​ June 30, ​ 2021 2022 ​ ​ (In millions) Accrued postretirement benefits ​ $ 8.4 ​ $ 8.3 Employee benefits ​ 6.1 ​ 5.4 Other ​ 13.5 ​ 10.9 Total ​ $ 28.0 ​ $ 24.6 ​

Revenue Recognition

Revenue Recognition	6 Months Ended
	Jun. 30, 2022
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 ​ Six months ended ​ ​ June 30, ​ June 30, ​ 2021 2022 2021 2022 ​ ​ (In millions) Net sales - point of origin: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ United States ​ $ 236.0 ​ $ 323.7 ​ $ 489.9 ​ $ 650.1 Germany ​ 238.8 ​ 272.0 ​ 470.0 ​ 548.5 Canada ​ 103.0 ​ 111.6 ​ 200.2 ​ 208.0 Belgium ​ 75.9 ​ 87.5 ​ 142.4 ​ 180.3 Norway ​ 64.1 ​ 68.0 ​ 135.1 ​ 146.4 Eliminations ​ (239.2) ​ (297.5) ​ (494.0) ​ (605.1) Total ​ $ 478.6 ​ $ 565.3 ​ $ 943.6 ​ $ 1,128.2 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Net sales - point of destination: ​ ​ ​ ​ Europe ​ $ 236.8 ​ $ 264.6 ​ $ 464.1 ​ $ 534.1 North America ​ 157.3 ​ 196.0 ​ 302.6 ​ 375.9 Other ​ 84.5 ​ 104.7 ​ 176.9 ​ 218.2 Total ​ $ 478.6 ​ $ 565.3 ​ $ 943.6 ​ $ 1,128.2 ​

Employee Benefit Plans

Employee Benefit Plans	6 Months Ended
	Jun. 30, 2022
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 ​ Six months ended ​ ​ June 30, ​ June 30, ​ 2021 2022 2021 2022 ​ ​ (In millions) Net periodic pension cost (income): ​ ​ ​ ​ Service cost ​ $ 3.6 ​ $ 2.9 ​ $ 7.4 ​ $ 5.9 Interest cost ​ 2.2 ​ 2.7 ​ 4.4 ​ 5.6 Expected return on plan assets ​ (3.0) ​ (3.0) ​ (6.0) ​ (6.1) Amortization of prior service cost ​ ​ .1 ​ ​ - ​ ​ .1 ​ ​ - Recognized actuarial losses ​ 5.1 ​ 3.4 ​ 10.2 ​ 6.8 Total ​ $ 8.0 ​ $ 6.0 ​ $ 16.1 ​ $ 12.2 ​ We expect our 2022 contributions for our pension plans to be approximately $19 million. ​ ​

Income Taxes

Income Taxes	6 Months Ended
	Jun. 30, 2022
Income Tax Disclosure [Abstract]
Income Taxes	Note 10 - Income taxes: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Three months ended ​ Six months ended ​ ​ June 30, ​ June 30, ​ 2021 2022 2021 2022 ​ ​ (In millions) Expected tax expense, at U.S. federal statutory ​ $ 7.3 ​ $ 12.7 ​ $ 12.7 ​ $ 28.6 Non-U.S. tax rates ​ 1.0 ​ 1.2 ​ 1.7 ​ 3.2 Incremental net tax benefit on earnings and losses of U.S. ​ (.8) ​ (.1) ​ (1.5) ​ (.5) Valuation allowance, net ​ .6 ​ (.6) ​ 1.1 ​ (.7) Global intangible low-tax income, net ​ .5 ​ .8 ​ 1.0 ​ 1.7 Adjustment to the reserve for uncertain tax positions, net ​ .1 ​ .3 ​ (.4) ​ (.5) Nondeductible expenses ​ .2 ​ .3 ​ .4 ​ .6 Other, net ​ .3 ​ .2 ​ .2 ​ .7 Income tax expense ​ $ 9.2 ​ $ 14.8 ​ $ 15.2 ​ $ 33.1 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Comprehensive provision for income taxes allocable to: ​ ​ ​ ​ Net income ​ $ 9.2 ​ $ 14.8 ​ $ 15.2 ​ $ 33.1 Other comprehensive income - pension plans ​ 1.6 ​ 1.0 ​ 3.2 ​ 2.1 Total ​ $ 10.8 ​ $ 15.8 ​ $ 18.4 ​ $ 35.2 ​ 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 expense (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 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 subsidiaries 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 decrease by approximately $1.1 million during the next twelve months primarily due to the expiration of certain statutes of limitations.

Stockholders' Equity

Stockholders' Equity	6 Months Ended
	Jun. 30, 2022
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 ​ Six months ended ​ ​ June 30, ​ June 30, ​ 2021 2022 2021 2022 ​ ​ (In millions) Accumulated other comprehensive loss, net of tax: ​ ​ ​ ​ Currency translation: ​ ​ ​ ​ Balance at beginning of period ​ $ (231.2) ​ $ (233.8) ​ $ (233.4) ​ $ (240.4) Other comprehensive income (loss) ​ 1.8 ​ (36.3) ​ 4.0 ​ (29.7) Balance at end of period ​ $ (229.4) ​ $ (270.1) ​ $ (229.4) ​ $ (270.1) ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Defined benefit pension plans: ​ ​ ​ ​ Balance at beginning of period ​ $ (211.0) ​ $ (160.9) ​ $ (214.5) ​ $ (163.3) Other comprehensive income - amortization ​ 3.5 ​ 2.3 ​ 7.0 ​ 4.7 Balance at end of period ​ $ (207.5) ​ $ (158.6) ​ $ (207.5) ​ $ (158.6) ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ OPEB plans: ​ ​ ​ ​ Balance at beginning of period ​ $ (.4) ​ $ (.5) ​ $ (.3) ​ $ (.4) Other comprehensive loss - amortization ​ - ​ ​ - ​ (.1) ​ (.1) Balance at end of period ​ $ (.4) ​ $ (.5) ​ $ (.4) ​ $ (.5) ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Total accumulated other comprehensive loss: ​ ​ ​ ​ Balance at beginning of period ​ $ (442.6) ​ $ (395.2) ​ $ (448.2) ​ $ (404.1) Other comprehensive income (loss) ​ 5.3 ​ (34.0) ​ 10.9 ​ (25.1) Balance at end of period ​ $ (437.3) ​ $ (429.2) ​ $ (437.3) ​ $ (429.2) ​ ​ 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 fourth quarter of 2021, we acquired 14,409 shares of common stock in market transactions for an aggregate purchase price of $.2 million which were accounted for as treasury stock at December 31, 2021 and we subsequently cancelled these shares in February 2022. During the first quarter of 2022, we acquired 73,881 shares of our common stock in market transactions for an aggregate purchase price of $1.1 million and we subsequently cancelled these shares in May 2022. At June 30, 2022, 1,475,229 shares are available for repurchase under this stock repurchase program.

Commitments and Contingencies

Commitments and Contingencies	6 Months Ended
	Jun. 30, 2022
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	6 Months Ended
	Jun. 30, 2022
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, 2021 June 30, 2022 ​ ​ Carrying ​ Fair ​ Carrying ​ Fair ​ ​ amount ​ value ​ amount ​ value ​ ​ (In millions) Cash, cash equivalents and restricted cash ​ $ 412.6 ​ $ 412.6 ​ $ 377.5 ​ $ 377.5 Long-term debt - Fixed rate Senior Notes ​ 448.8 ​ 460.2 ​ 415.1 ​ 372.6 ​ At June 30, 2022, the estimated market price of our Senior Notes was €892 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.

Organization and Basis of Pre_2

Organization and Basis of Presentation (Policies)	6 Months Ended
	Jun. 30, 2022
Organization Consolidation And Presentation Of Financial Statements [Abstract]
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.
Marketable Securities	All of 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. Any unrealized gains or losses on the securities are recognized in Other income (expense) - Marketable equity securities on our Condensed Consolidated Statements of Income.
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)	6 Months Ended
	Jun. 30, 2022
Receivables [Abstract]
Accounts and Other Receivables, Net	​ ​ ​ ​ ​ ​ ​ ​ ​ ​ December 31, ​ June 30, ​ 2021 2022 ​ ​ (In millions) Trade receivables ​ $ 326.3 ​ $ 372.1 Recoverable VAT and other receivables ​ 32.4 ​ 22.9 Receivables from affiliates: ​ ​ ​ ​ ​ ​ Louisiana Pigment Company, L.P. (LPC) ​ ​ 15.8 ​ ​ 6.7 Other ​ ​ 2.6 ​ ​ 3.3 Refundable income taxes ​ 4.0 ​ 2.6 Allowance for doubtful accounts ​ (2.0) ​ (3.3) Total ​ $ 379.1 ​ $ 404.3

Inventories, Net (Tables)

Inventories, Net (Tables)	6 Months Ended
	Jun. 30, 2022
Inventory Disclosure [Abstract]
Schedule of Inventories, Net	​ ​ ​ ​ ​ ​ ​ ​ ​ ​ December 31, ​ June 30, ​ 2021 2022 ​ ​ (In millions) Raw materials ​ $ 76.3 ​ $ 108.9 Work in process ​ 30.4 ​ 28.6 Finished products ​ 245.6 ​ 220.2 Supplies ​ 80.0 ​ 77.3 Total ​ $ 432.3 ​ $ 435.0

Marketable Securities (Tables)

Marketable Securities (Tables)	6 Months Ended
	Jun. 30, 2022
Investments Debt And Equity Securities [Abstract]
Classification of Marketable Securities	​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Fair value ​ ​ ​ ​ ​ ​ ​ ​ measurement ​ Market ​ Cost ​ Unrealized Marketable security level value basis gain ​ ​ ​ (In millions) December 31, 2021: ​ ​ ​ Valhi common stock 1 ​ $ 4.1 ​ $ 3.2 ​ $ .9 NL and CompX common stocks 1 ​ .1 ​ .1 ​ - Total ​ ​ ​ $ 4.2 ​ $ 3.3 ​ $ .9 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ June 30, 2022: ​ ​ ​ ​ ​ Valhi common stock 1 ​ $ 6.5 ​ $ 3.2 ​ $ 3.3

Long-Term Debt (Tables)

Long-Term Debt (Tables)	6 Months Ended
	Jun. 30, 2022
Debt Disclosure [Abstract]
Components of Long Term Debt	​ ​ ​ ​ ​ ​ ​ ​ ​ ​ December 31, ​ June 30, ​ 2021 2022 ​ ​ (In millions) Kronos International, Inc. 3.75% Senior Notes ​ $ 448.8 ​ $ 415.1 Other ​ 2.4 ​ 2.1 Total debt ​ 451.2 ​ 417.2 Less current maturities ​ 1.4 ​ 1.4 Total long-term debt ​ $ 449.8 ​ $ 415.8

Accounts Payable and Accrued _2

Accounts Payable and Accrued Liabilities (Tables)	6 Months Ended
	Jun. 30, 2022
Payables And Accruals [Abstract]
Components of Accounts Payable and Accrued Liabilities	​ ​ ​ ​ ​ ​ ​ ​ ​ ​ December 31, ​ June 30, ​ 2021 2022 ​ ​ (In millions) Accounts payable ​ $ 143.6 ​ $ 137.9 Accrued sales discounts and rebates ​ 28.7 ​ 17.1 Employee benefits ​ 28.9 ​ 20.9 Payables to affiliates: ​ ​ ​ ​ ​ ​ LPC ​ ​ 17.3 ​ ​ 22.6 Income taxes payable to Valhi ​ ​ .9 ​ ​ 12.3 Operating lease liabilities ​ 3.7 ​ 3.5 Other ​ 52.0 ​ 53.3 Total ​ $ 275.1 ​ $ 267.6

Other Noncurrent Liabilities (T

Other Noncurrent Liabilities (Tables)	6 Months Ended
	Jun. 30, 2022
Other Liabilities Disclosure [Abstract]
Components of Other Noncurrent Liabilities	​ ​ ​ ​ ​ ​ ​ ​ ​ December 31, ​ June 30, ​ 2021 2022 ​ ​ (In millions) Accrued postretirement benefits ​ $ 8.4 ​ $ 8.3 Employee benefits ​ 6.1 ​ 5.4 Other ​ 13.5 ​ 10.9 Total ​ $ 28.0 ​ $ 24.6

Revenue Recognition (Tables)

Revenue Recognition (Tables)	6 Months Ended
	Jun. 30, 2022
Revenue From Contract With Customer [Abstract]
Disaggregation of Net Sales by Place of Manufacture and to Location of Customer	​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Three months ended ​ Six months ended ​ ​ June 30, ​ June 30, ​ 2021 2022 2021 2022 ​ ​ (In millions) Net sales - point of origin: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ United States ​ $ 236.0 ​ $ 323.7 ​ $ 489.9 ​ $ 650.1 Germany ​ 238.8 ​ 272.0 ​ 470.0 ​ 548.5 Canada ​ 103.0 ​ 111.6 ​ 200.2 ​ 208.0 Belgium ​ 75.9 ​ 87.5 ​ 142.4 ​ 180.3 Norway ​ 64.1 ​ 68.0 ​ 135.1 ​ 146.4 Eliminations ​ (239.2) ​ (297.5) ​ (494.0) ​ (605.1) Total ​ $ 478.6 ​ $ 565.3 ​ $ 943.6 ​ $ 1,128.2 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Net sales - point of destination: ​ ​ ​ ​ Europe ​ $ 236.8 ​ $ 264.6 ​ $ 464.1 ​ $ 534.1 North America ​ 157.3 ​ 196.0 ​ 302.6 ​ 375.9 Other ​ 84.5 ​ 104.7 ​ 176.9 ​ 218.2 Total ​ $ 478.6 ​ $ 565.3 ​ $ 943.6 ​ $ 1,128.2

Employee Benefit Plans (Tables)

Employee Benefit Plans (Tables)	6 Months Ended
	Jun. 30, 2022
Compensation And Retirement Disclosure [Abstract]
Components of Net Periodic Benefit Cost	​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Three months ended ​ Six months ended ​ ​ June 30, ​ June 30, ​ 2021 2022 2021 2022 ​ ​ (In millions) Net periodic pension cost (income): ​ ​ ​ ​ Service cost ​ $ 3.6 ​ $ 2.9 ​ $ 7.4 ​ $ 5.9 Interest cost ​ 2.2 ​ 2.7 ​ 4.4 ​ 5.6 Expected return on plan assets ​ (3.0) ​ (3.0) ​ (6.0) ​ (6.1) Amortization of prior service cost ​ ​ .1 ​ ​ - ​ ​ .1 ​ ​ - Recognized actuarial losses ​ 5.1 ​ 3.4 ​ 10.2 ​ 6.8 Total ​ $ 8.0 ​ $ 6.0 ​ $ 16.1 ​ $ 12.2

Income Taxes (Tables)

Income Taxes (Tables)	6 Months Ended
	Jun. 30, 2022
Income Tax Disclosure [Abstract]
Components of Income Taxes and Comprehensive Provision for Income Taxes Allocation	​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Three months ended ​ Six months ended ​ ​ June 30, ​ June 30, ​ 2021 2022 2021 2022 ​ ​ (In millions) Expected tax expense, at U.S. federal statutory ​ $ 7.3 ​ $ 12.7 ​ $ 12.7 ​ $ 28.6 Non-U.S. tax rates ​ 1.0 ​ 1.2 ​ 1.7 ​ 3.2 Incremental net tax benefit on earnings and losses of U.S. ​ (.8) ​ (.1) ​ (1.5) ​ (.5) Valuation allowance, net ​ .6 ​ (.6) ​ 1.1 ​ (.7) Global intangible low-tax income, net ​ .5 ​ .8 ​ 1.0 ​ 1.7 Adjustment to the reserve for uncertain tax positions, net ​ .1 ​ .3 ​ (.4) ​ (.5) Nondeductible expenses ​ .2 ​ .3 ​ .4 ​ .6 Other, net ​ .3 ​ .2 ​ .2 ​ .7 Income tax expense ​ $ 9.2 ​ $ 14.8 ​ $ 15.2 ​ $ 33.1 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Comprehensive provision for income taxes allocable to: ​ ​ ​ ​ Net income ​ $ 9.2 ​ $ 14.8 ​ $ 15.2 ​ $ 33.1 Other comprehensive income - pension plans ​ 1.6 ​ 1.0 ​ 3.2 ​ 2.1 Total ​ $ 10.8 ​ $ 15.8 ​ $ 18.4 ​ $ 35.2

Stockholders' Equity (Tables)

Stockholders' Equity (Tables)	6 Months Ended
	Jun. 30, 2022
Equity [Abstract]
Schedule of Changes in Accumulated Other Comprehensive Loss	​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Three months ended ​ Six months ended ​ ​ June 30, ​ June 30, ​ 2021 2022 2021 2022 ​ ​ (In millions) Accumulated other comprehensive loss, net of tax: ​ ​ ​ ​ Currency translation: ​ ​ ​ ​ Balance at beginning of period ​ $ (231.2) ​ $ (233.8) ​ $ (233.4) ​ $ (240.4) Other comprehensive income (loss) ​ 1.8 ​ (36.3) ​ 4.0 ​ (29.7) Balance at end of period ​ $ (229.4) ​ $ (270.1) ​ $ (229.4) ​ $ (270.1) ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Defined benefit pension plans: ​ ​ ​ ​ Balance at beginning of period ​ $ (211.0) ​ $ (160.9) ​ $ (214.5) ​ $ (163.3) Other comprehensive income - amortization ​ 3.5 ​ 2.3 ​ 7.0 ​ 4.7 Balance at end of period ​ $ (207.5) ​ $ (158.6) ​ $ (207.5) ​ $ (158.6) ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ OPEB plans: ​ ​ ​ ​ Balance at beginning of period ​ $ (.4) ​ $ (.5) ​ $ (.3) ​ $ (.4) Other comprehensive loss - amortization ​ - ​ ​ - ​ (.1) ​ (.1) Balance at end of period ​ $ (.4) ​ $ (.5) ​ $ (.4) ​ $ (.5) ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Total accumulated other comprehensive loss: ​ ​ ​ ​ Balance at beginning of period ​ $ (442.6) ​ $ (395.2) ​ $ (448.2) ​ $ (404.1) Other comprehensive income (loss) ​ 5.3 ​ (34.0) ​ 10.9 ​ (25.1) Balance at end of period ​ $ (437.3) ​ $ (429.2) ​ $ (437.3) ​ $ (429.2)

Financial Instruments (Tables)

Financial Instruments (Tables)	6 Months Ended
	Jun. 30, 2022
Fair Value Disclosures [Abstract]
Financial Instruments not Carried at Fair Value but which Require Fair Value Disclosure	​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ December 31, 2021 June 30, 2022 ​ ​ Carrying ​ Fair ​ Carrying ​ Fair ​ ​ amount ​ value ​ amount ​ value ​ ​ (In millions) Cash, cash equivalents and restricted cash ​ $ 412.6 ​ $ 412.6 ​ $ 377.5 ​ $ 377.5 Long-term debt - Fixed rate Senior Notes ​ 448.8 ​ 460.2 ​ 415.1 ​ 372.6

Organization and Basis of Pre_3

Organization and Basis of Presentation - Additional Information (Detail)	6 Months Ended
	Jun. 30, 2022
Valhi Inc | Parent Company
Organization And Basis Of Presentation [Line Items]
Parent company ownership interest	50%
Valhi Inc | NL Industries Inc.
Organization And Basis Of Presentation [Line Items]
Ownership percentage in company	83%
NL Industries Inc. | Parent Company
Organization And Basis Of Presentation [Line Items]
Parent company ownership interest	31%
Contran
Organization And Basis Of Presentation [Line Items]
Controlling interest description	Consequently, at June 30, 2022, 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	92%

Accounts and Other Receivable_3

Accounts and Other Receivables, Net - Accounts and Other Receivables, Net (Detail) - USD ($) $ in Millions	Jun. 30, 2022	Dec. 31, 2021
Accounts Notes And Loans Receivable [Line Items]
Allowance for doubtful accounts	$ (3.3)	$ (2)
Total	404.3	379.1
Trade receivables
Accounts Notes And Loans Receivable [Line Items]
Accounts and other receivables	372.1	326.3
Recoverable VAT and other receivables
Accounts Notes And Loans Receivable [Line Items]
Accounts and other receivables	22.9	32.4
Other
Accounts Notes And Loans Receivable [Line Items]
Receivables from affiliates	3.3	2.6
Refundable income taxes
Accounts Notes And Loans Receivable [Line Items]
Refundable income taxes	2.6	4
Louisiana Pigment Company, L.P. ("LPC'')
Accounts Notes And Loans Receivable [Line Items]
Receivables from affiliates	$ 6.7	$ 15.8

Inventories, Net - Schedule of

Inventories, Net - Schedule of Inventories, Net (Detail) - USD ($) $ in Millions	Jun. 30, 2022	Dec. 31, 2021
Inventory Disclosure [Abstract]
Raw materials	$ 108.9	$ 76.3
Work in process	28.6	30.4
Finished products	220.2	245.6
Supplies	77.3	80
Total	$ 435	$ 432.3

Marketable Securities - Classif

Marketable Securities - Classification of Marketable Securities (Detail) - USD ($) $ in Millions	6 Months Ended	12 Months Ended
	Jun. 30, 2022	Dec. 31, 2021
Marketable Securities [Line Items]
Market value	$ 6.5	$ 4.2
Cost basis		3.3
Unrealized gain		0.9
Level 1 | Common stock | Valhi
Marketable Securities [Line Items]
Market value	6.5	4.1
Cost basis	3.2	3.2
Unrealized gain	$ 3.3	0.9
Level 1 | Common stock | NL And CompX
Marketable Securities [Line Items]
Market value		0.1
Cost basis		$ 0.1

Marketable Securities - Additio

Marketable Securities - Additional Information (Detail) - Common stock - USD ($) $ / shares in Units, $ in Millions	3 Months Ended
	Jun. 30, 2022	Dec. 31, 2021
NL And CompX
Marketable Securities [Line Items]
Sale of NL and CompX common stock	$ 0.1
Valhi Inc
Marketable Securities [Line Items]
Investments in publicly-traded shares	144,000	144,000
Quoted market price of per share	$ 45.34	$ 28.75

Long-Term Debt - Components of

Long-Term Debt - Components of Long-Term Debt (Detail) € in Millions, $ in Millions	Jun. 30, 2022 USD ($)	Jun. 30, 2022 EUR (€)	Dec. 31, 2021 USD ($)
Debt Instrument [Line Items]
Kronos International, Inc. 3.75% Senior Notes	$ 415.1		$ 448.8
Other	2.1		2.4
Total debt	417.2		451.2
Less current maturities	1.4		1.4
Total long-term debt	415.8		449.8
Kronos International, Inc | 3.75% Senior Notes
Debt Instrument [Line Items]
Kronos International, Inc. 3.75% Senior Notes	$ 415.1	€ 400	$ 448.8

Long-Term Debt - Senior Notes -

Long-Term Debt - Senior Notes - Additional Information (Detail) € in Millions, $ in Millions	6 Months Ended
	Jun. 30, 2022 USD ($)	Jun. 30, 2022 EUR (€)	Dec. 31, 2021 USD ($)
Debt Instrument [Line Items]
Aggregate principal amount outstanding	$ 415.1		$ 448.8
Kronos International, Inc | 3.75% Senior Secured Notes due September 15, 2025
Debt Instrument [Line Items]
Aggregate principal amount outstanding	$ 415.1	€ 400	$ 448.8
Debt instrument interest rate	3.75%	3.75%
Unamortized debt issuance costs	$ 2.8
Debt instrument maturity date	Sep. 15, 2025

Long-Term Debt - Revolving Cred

Long-Term Debt - Revolving Credit Facilities - Additional Information (Detail) - Global Revolver $ in Millions	6 Months Ended
	Jun. 30, 2022 USD ($)
Debt Instrument [Line Items]
Maximum borrowing capacity	$ 225
Borrowings under credit facility during the period	0
Repayments of lines of credit	0
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	Jun. 30, 2022	Dec. 31, 2021
Accounts Payable And Accrued Liabilities [Line Items]
Accounts payable	$ 137.9	$ 143.6
Employee benefits	17.1	28.7
Accrued sales discounts and rebates	20.9	28.9
Operating lease liabilities	$ 3.5	$ 3.7
Operating Lease, Liability, Current, Statement of Financial Position [Extensible Enumeration]	Total	Total
Other	$ 53.3	$ 52
Total	267.6	275.1
LPC
Accounts Payable And Accrued Liabilities [Line Items]
Payables to affiliate	22.6	17.3
Valhi | Income taxes
Accounts Payable And Accrued Liabilities [Line Items]
Payables to affiliate	$ 12.3	$ 0.9

Other Noncurrent Liabilities -

Other Noncurrent Liabilities - Components of Other Noncurrent Liabilities (Detail) - USD ($) $ in Millions	Jun. 30, 2022	Dec. 31, 2021
Other Liabilities Noncurrent [Abstract]
Accrued postretirement benefits	$ 8.3	$ 8.4
Employee benefits	5.4	6.1
Other	10.9	13.5
Total	$ 24.6	$ 28

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		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Entity Wide Information Revenue From External Customer [Line Items]
Net sales	$ 565.3	$ 478.6	$ 1,128.2	$ 943.6
Point of origin
Entity Wide Information Revenue From External Customer [Line Items]
Net sales	565.3	478.6	1,128.2	943.6
Point of origin | Reportable Geographical Components | United States
Entity Wide Information Revenue From External Customer [Line Items]
Net sales	323.7	236	650.1	489.9
Point of origin | Reportable Geographical Components | Germany
Entity Wide Information Revenue From External Customer [Line Items]
Net sales	272	238.8	548.5	470
Point of origin | Reportable Geographical Components | Canada
Entity Wide Information Revenue From External Customer [Line Items]
Net sales	111.6	103	208	200.2
Point of origin | Reportable Geographical Components | Belgium
Entity Wide Information Revenue From External Customer [Line Items]
Net sales	87.5	75.9	180.3	142.4
Point of origin | Reportable Geographical Components | Norway
Entity Wide Information Revenue From External Customer [Line Items]
Net sales	68	64.1	146.4	135.1
Point of origin | Eliminations
Entity Wide Information Revenue From External Customer [Line Items]
Net sales	(297.5)	(239.2)	(605.1)	(494)
Point of destination
Entity Wide Information Revenue From External Customer [Line Items]
Net sales	565.3	478.6	1,128.2	943.6
Point of destination | Europe
Entity Wide Information Revenue From External Customer [Line Items]
Net sales	264.6	236.8	534.1	464.1
Point of destination | North America
Entity Wide Information Revenue From External Customer [Line Items]
Net sales	196	157.3	375.9	302.6
Point of destination | Other
Entity Wide Information Revenue From External Customer [Line Items]
Net sales	$ 104.7	$ 84.5	$ 218.2	$ 176.9

Employee Benefit Plans - Compon

Employee Benefit Plans - Components of Net Periodic Benefit Cost (Detail) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Defined Benefit Plan Disclosure [Line Items]
Service cost	$ 2.9	$ 3.6
Interest cost	2.7	2.2
Expected return on plan assets	(3)	(3)
Recognized actuarial losses	3.4	5.1
Total	$ 6	$ 8
Defined Benefit Pension Plans
Defined Benefit Plan Disclosure [Line Items]
Service cost			$ 5.9	$ 7.4
Interest cost			5.6	4.4
Expected return on plan assets			(6.1)	(6)
Recognized actuarial losses			6.8	10.2
Total			$ 12.2	$ 16.1

Employee Benefit Plans - Additi

Employee Benefit Plans - Additional Information (Detail) $ in Millions	Jun. 30, 2022 USD ($)
Compensation And Retirement Disclosure [Abstract]
Expected contributions for pension plans in 2021	$ 19

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		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Schedule Of Income Tax [Line Items]
Expected tax expense, at U.S. federal statutory income tax rate of 21%	$ 12.7	$ 7.3	$ 28.6	$ 12.7
Non-U.S. tax rates	1.2	1	3.2	1.7
Incremental net tax benefit on earnings and losses of U.S. and non-U.S. companies	(0.1)	(0.8)	(0.5)	(1.5)
Valuation allowance, net	(0.6)	0.6	(0.7)	1.1
Global intangible low-tax income, net	0.8	0.5	1.7	1
Adjustment to the reserve for uncertain tax positions, net	0.3	0.1	(0.5)	(0.4)
Other, net	0.2	0.3	0.7	0.2
Income tax expense	14.8	9.2	33.1	15.2
Comprehensive provision for income taxes allocable to:
Net income	14.8	9.2	33.1	15.2
Other comprehensive income (loss):
Total	15.8	10.8	35.2	18.4
Defined Benefit Pension Plans
Other comprehensive income (loss):
Benefit plans	$ 1	$ 1.6	$ 2.1	$ 3.2

Income Taxes - Components of _2

Income Taxes - Components of Income Taxes and Comprehensive Provision for Income Taxes Allocation (Parenthetical) (Detail)	6 Months Ended
	Jun. 30, 2022
Income Tax Disclosure [Abstract]
U.S. Federal statutory income tax rate	21%

Income Taxes - Additional Infor

Income Taxes - Additional Information (Detail) $ in Millions	Jun. 30, 2022 USD ($)
Income Tax Disclosure [Abstract]
Estimated unrecognized tax benefits decrease amount for next twelve months	$ 1.1

Stockholders' Equity - Addition

Stockholders' Equity - Additional Information (Detail) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Mar. 31, 2022	Dec. 31, 2021	Jun. 30, 2022
Accumulated Other Comprehensive Income Loss [Line Items]
Number of shares authorized for repurchase			2,000,000
Aggregate purchase price			$ 1.1
Shares available for repurchase under the plan			1,475,229
Common stock
Accumulated Other Comprehensive Income Loss [Line Items]
Stock repurchased and acquired in market transactions	73,881	14,409
Treasury Stock, Common
Accumulated Other Comprehensive Income Loss [Line Items]
Aggregate purchase price	$ 1.1	$ 0.2

Stockholders' Equity - Schedule

Stockholders' Equity - Schedule of Changes in Accumulated Other Comprehensive Loss (Detail) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Accumulated Other Comprehensive Income Loss [Line Items]
Beginning Balance	$ 913.6	$ 800.9	$ 870.2	$ 796.5
Ending Balance	903.6	811.2	903.6	811.2
Currency Translation
Accumulated Other Comprehensive Income Loss [Line Items]
Beginning Balance	(233.8)	(231.2)	(240.4)	(233.4)
Other comprehensive income (loss)	(36.3)	1.8	(29.7)	4
Ending Balance	(270.1)	(229.4)	(270.1)	(229.4)
Accumulated Defined Benefit Plans Adjustment | Defined Benefit Pension Plans
Accumulated Other Comprehensive Income Loss [Line Items]
Beginning Balance	(160.9)	(211)	(163.3)	(214.5)
Other comprehensive income (loss)	2.3	3.5	4.7	7
Ending Balance	(158.6)	(207.5)	(158.6)	(207.5)
Accumulated Defined Benefit Plans Adjustment | OPEB Plans
Accumulated Other Comprehensive Income Loss [Line Items]
Beginning Balance	(0.5)	(0.4)	(0.4)	(0.3)
Other comprehensive income (loss)			(0.1)	(0.1)
Ending Balance	(0.5)	(0.4)	(0.5)	(0.4)
Total Accumulated Other Comprehensive Loss
Accumulated Other Comprehensive Income Loss [Line Items]
Beginning Balance	(395.2)	(442.6)	(404.1)	(448.2)
Other comprehensive income (loss)	(34)	5.3	(25.1)	10.9
Ending Balance	$ (429.2)	$ (437.3)	$ (429.2)	$ (437.3)

Financial Instruments - Financi

Financial Instruments - Financial Instruments not Carried at Fair Value but which Require Fair Value Disclosure (Detail) - USD ($) $ in Millions	Jun. 30, 2022	Dec. 31, 2021	Jun. 30, 2021	Dec. 31, 2020
Fair Value Disclosures [Abstract]
Cash, cash equivalents and restricted cash, Carrying amount	$ 377.5	$ 412.6	$ 370.2	$ 362
Long-term debt - Fixed rate Senior Notes, Carrying amount	415.1	448.8
Cash, cash equivalents and restricted cash, Fair value	377.5	412.6
Long-term debt - Fixed rate Senior Notes, Fair value	$ 372.6	$ 460.2

Financial Instruments - Additio

Financial Instruments - Additional Information (Detail) - Senior Notes	Jun. 30, 2022 EUR (€)
Financial Instrument At Fair Value [Line Items]
Debt instrument base principal amount	€ 1,000
Debt instrument estimated market price per 1000 principal amount	€ 892