0001564590-21-012064 | 10-K | XBRL Viewer

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Document and Entity Information - USD ($) $ in Millions	12 Months Ended
Document and Entity Information - USD ($) $ in Millions	Dec. 31, 2020	Feb. 26, 2021	Jun. 30, 2020
Cover [Abstract]
Document Type	10-K
Amendment Flag	false
Document Period End Date	Dec. 31, 2020
Document Fiscal Year Focus	2020
Document Fiscal Period Focus	FY
Trading Symbol	KRO
Security Exchange Name	NYSE
Title of 12(b) Security	Common stock
Entity Registrant Name	KRONOS WORLDWIDE, INC.
Entity Central Index Key	0001257640
Current Fiscal Year End Date	--12-31
Entity Well-known Seasoned Issuer	No
Entity Current Reporting Status	Yes
Entity Voluntary Filers	No
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		115,542,717
Entity Public Float			$ 231.1
Entity File Number	1-31763
Entity Tax Identification Number	76-0294959
Entity Incorporation, State or Country Code	DE
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
Document Annual Report	true
Document Transition Report	false
ICFR Auditor Attestation Flag	true
Documents Incorporated by Reference	The information required by Part III is incorporated by reference from the Registrant’s definitive proxy statement to be filed with the Commission pursuant to Regulation 14A not later than 120 days after the end of the fiscal year covered by this report.

CONSOLIDATED BALANCE SHEETS - USD ($) $ in Millions	Dec. 31, 2020	Dec. 31, 2019
Current assets:
Cash and cash equivalents	$ 355.3	$ 390.8
Restricted cash	2.0	1.5
Accounts and other receivables, net	319.5	302.5
Receivables from affiliates	3.5	6.9
Inventories, net	519.0	503.0
Prepaid expenses and other	19.0	15.0
Total current assets	1,218.3	1,219.7
Other assets:
Investment in TiO2 manufacturing joint venture	103.3	90.2
Restricted cash	4.7
Marketable securities	2.2	3.3
Operating lease right-of-use assets	26.1	29.0
Deferred income taxes	151.0	127.7
Other	6.5	5.3
Total other assets	293.8	255.5
Property and equipment:
Land	44.1	40.4
Buildings	233.9	211.4
Equipment	1,173.7	1,113.1
Mining properties	127.8	116.2
Construction in progress	56.1	54.9
Gross property and equipment	1,635.6	1,536.0
Less accumulated depreciation and amortization	1,111.0	1,045.4
Net property and equipment	524.6	490.6
Total assets	2,036.7	1,965.8
Current liabilities:
Current maturities of long-term debt	0.7	1.5
Accounts payable and accrued liabilities	215.9	237.7
Payables to affiliates	27.9	21.3
Income taxes	15.7	10.1
Total current liabilities	260.2	270.6
Noncurrent liabilities:
Long-term debt	486.7	444.0
Accrued pension costs	372.6	307.4
Payable to affiliate - income taxes	50.6	56.6
Operating lease liabilities	18.8	22.2
Deferred income taxes	24.6	20.7
Other	26.7	28.2
Total noncurrent liabilities	980.0	879.1
Stockholders' equity:
Common stock, $.01 par value; 240.0 shares authorized; 115.7 and 115.5 shares issued and outstanding	1.2	1.2
Additional paid-in capital	1,395.3	1,396.2
Retained deficit	(151.8)	(132.5)
Accumulated other comprehensive loss	(448.2)	(448.8)
Total stockholders' equity	796.5	816.1
Total liabilities and stockholders' equity	2,036.7	1,965.8
Commitments and contingencies (Notes 13 and 16)

CONSOLIDATED BALANCE SHEETS (Parenthetical) - $ / shares	Dec. 31, 2020	Dec. 31, 2019
Statement Of Financial Position [Abstract]
Common stock, par value	$ 0.01	$ 0.01
Common stock, authorized	240,000,000.0	240,000,000.0
Common stock, shares issued	115,500,000	115,700,000
Common stock, shares, outstanding	115,500,000	115,700,000

CONSOLIDATED STATEMENTS OF INCOME - USD ($) shares in Millions, $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Income Statement [Abstract]
Net sales	$ 1,638.8	$ 1,731.1	$ 1,661.9
Cost of sales	1,287.6	1,344.9	1,099.7
Gross margin	351.2	386.2	562.2
Selling, general and administrative expense	218.6	228.2	228.3
Other operating income (expense):
Currency transactions, net	(4.0)	2.0	10.1
Disposition of property and equipment	(0.2)	(0.2)	(0.2)
Other income, net	1.6	1.1	0.8
Corporate expense	(13.8)	(15.1)	(14.5)
Income from operations	116.2	145.8	330.1
Other income (expense):
Interest and dividend income	1.8	6.7	5.5
Insurance settlement gain	1.5	2.6
Marketable equity securities	(1.1)	(0.1)	(7.3)
Other components of net periodic pension and OPEB cost	(19.4)	(15.2)	(15.0)
Interest expense	(19.0)	(18.7)	(19.5)
Income before income taxes	80.0	121.1	293.8
Income tax expense	16.1	34.0	88.8
Net income	$ 63.9	$ 87.1	$ 205.0
Net income per basic and diluted share	$ 0.55	$ 0.75	$ 1.77
Weighted average shares used in the calculation of net income per share	115.6	115.8	115.9

CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Net income	$ 63.9	$ 87.1	$ 205.0
Other comprehensive income (loss), net of tax:
Currency translation	13.4	(1.8)	(33.1)
Total other comprehensive income (loss), net	0.6	(24.5)	(40.8)
Comprehensive income	64.5	62.6	164.2
Defined Benefit Pension Plans
Other comprehensive income (loss), net of tax:
Defined benefit plans	(12.3)	(22.2)	(7.2)
OPEB
Other comprehensive income (loss), net of tax:
Defined benefit plans	$ (0.5)	$ (0.5)	$ (0.5)

- Definition

The portion of profit or loss for the period, net of income taxes, which is attributable to the parent.

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+ Details

- Definition

Amount after tax and reclassification adjustments of other comprehensive income (loss).

+ References

+ Details

CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY - USD ($) $ in Millions	Total	Adjusted Balance	Common stock	Common stock Adjusted Balance	Additional paid-in capital	Additional paid-in capital Adjusted Balance	Retained deficit	Retained deficit Change in Accounting Principle - ASU 2016-01	Retained deficit Adjusted Balance	Accumulated other comprehensive loss	Accumulated other comprehensive loss Change in Accounting Principle - ASU 2016-01	Accumulated other comprehensive loss Adjusted Balance	Treasury stock
Beginning Balance at Dec. 31, 2017	$ 754.3	$ 754.3	$ 1.2	$ 1.2	$ 1,399.0	$ 1,399.0	$ (267.2)	$ 4.8	$ (262.4)	$ (378.7)	$ (4.8)	$ (383.5)
Accounting Standards Update [Extensible List]	us-gaap:AccountingStandardsUpdate201601Member
Net income	$ 205.0						205.0
Other comprehensive income (loss), net of tax	(40.8)									(40.8)
Issuance of common stock	0.1				0.1
Dividends paid	(78.8)						(78.8)
Ending Balance at Dec. 31, 2018	839.8		1.2		1,399.1		(136.2)			(424.3)
Net income	87.1						87.1
Other comprehensive income (loss), net of tax	(24.5)									(24.5)
Issuance of common stock	0.1				0.1
Dividends paid	(83.4)						(83.4)
Treasury stock acquired	(3.0)		(3.0)										$ (3.0)
Treasury stock retired					(3.0)								3.0
Ending Balance at Dec. 31, 2019	816.1		1.2		1,396.2		(132.5)			(448.8)
Net income	63.9						63.9
Other comprehensive income (loss), net of tax	0.6									0.6
Issuance of common stock	0.1				0.1
Dividends paid	(83.2)						(83.2)
Treasury stock acquired	(1.0)		(1.0)										(1.0)
Treasury stock retired					(1.0)								$ 1.0
Ending Balance at Dec. 31, 2020	$ 796.5		$ 1.2		$ 1,395.3		$ (151.8)			$ (448.2)

- Definition

Indicates amendment to accounting standards.

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-URI http://asc.fasb.org/extlink&oid=121646688&loc=SL121648383-210437

Reference 30: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 944
-SubTopic 40
-Section 65
-Paragraph 2
-Subparagraph (g)(2)(ii)
-URI http://asc.fasb.org/extlink&oid=121370832&loc=SL117420844-207641

Reference 31: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 740
-SubTopic 10
-Section 65
-Paragraph 8
-Subparagraph (d)(2)

Reference 32: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 740
-SubTopic 10
-Section 65
-Paragraph 8
-Subparagraph (d)(3)

+ Details

- Definition

The portion of profit or loss for the period, net of income taxes, which is attributable to the parent.

+ References

+ Details

- Definition

Amount after tax and reclassification adjustments of other comprehensive income (loss).

+ References

+ Details

- Definition

Total of all stockholders' equity (deficit) items, net of receivables from officers, directors, owners, and affiliates of the entity which are attributable to the parent. The amount of the economic entity's stockholders' equity attributable to the parent excludes the amount of stockholders' equity which is allocable to that ownership interest in subsidiary equity which is not attributable to the parent (noncontrolling interest, minority interest). This excludes temporary equity and is sometimes called permanent equity.

+ References + Details

CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY (Parenthetical) - $ / shares	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Cash dividends per share	$ 0.72	$ 0.72	$ 0.68
Retained deficit
Cash dividends per share	$ 0.72	$ 0.72	$ 0.68

CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Cash flows from operating activities:
Net income	$ 63.9	$ 87.1	$ 205.0
Depreciation	58.1	48.1	49.7
Amortization of operating lease right-of-use assets	6.5	6.8
Deferred income taxes	(3.2)	6.5	27.3
Benefit plan expense greater than cash funding	15.7	11.1	8.4
Marketable equity securities	1.1	0.1	7.3
Distributions from (contributions to) TiO2 manufacturing joint venture, net	(12.8)	(9.3)	4.0
Other, net	0.9	2.5	2.8
Change in assets and liabilities:
Accounts and other receivables, net	(4.7)	(6.8)	8.7
Inventories, net	13.3	(7.1)	(135.5)
Prepaid expenses	(3.0)	0.3	(5.3)
Accounts payable and accrued liabilities	(33.2)	24.6	16.4
Income taxes	6.6	(3.1)	(16.4)
Accounts with affiliates	(4.3)	(0.7)	15.4
Other noncurrent assets	(4.6)		1.5
Other noncurrent liabilities	2.2	0.2	(0.8)
Net cash provided by operating activities	102.5	160.3	188.5
Cash flows from investing activities:
Capital expenditures	(62.8)	(55.1)	(56.3)
Proceeds from insurance settlement	1.5	2.6
Net cash used in investing activities	(61.3)	(52.5)	(42.7)
Cash flows from financing activities:
Payments on long-term debt	(1.1)	(1.5)	(1.5)
Deferred financing fees			(0.1)
Dividends paid	(83.2)	(83.4)	(78.8)
Treasury stock acquired	(1.0)	(3.0)
Net cash used in financing activities	(85.3)	(87.9)	(80.4)
Cash, cash equivalents and restricted cash - net change from:
Operating, investing and financing activities	(44.1)	19.9	65.4
Effect of currency exchange rate changes on cash	13.8	(2.3)	(14.4)
Net change for the year	(30.3)	17.6	51.0
Balance at beginning of year	392.3	374.7	323.7
Balance at end of year	362.0	392.3	374.7
Cash paid for:
Interest, net of amounts capitalized	18.0	17.4	18.5
Income taxes	15.3	35.8	67.9
Accrual for capital expenditures	$ 5.8	9.1	6.3
Valhi
Cash flows from investing activities:
Loans		(16.6)	(2.6)
Collections		$ 16.6	$ 16.2

Summary of Significant Accounting Policies

12 Months Ended

Dec. 31, 2020

Accounting Policies [Abstract]

Summary of Significant Accounting Policies

Note 1 – Summary of significant accounting policies:

Organization and basis of presentation – At December 31, 2020, Valhi, Inc. (NYSE: VHI) held approximately 50% of our outstanding common stock and a wholly-owned subsidiary of NL Industries, Inc. (NYSE: NL) held approximately 30% of our common stock. Valhi owned approximately 83% of NL’s outstanding common stock and a wholly-owned subsidiary of Contran Corporation held approximately 92% of Valhi’s outstanding common stock. A majority of Contran’s outstanding voting stock is held directly by Lisa K. Simmons and various family trusts established for the benefit of Ms. Simmons, Thomas C. Connelly (the husband of Ms. Simmons’ late sister) and their children and for which Ms. Simmons or Mr. Connelly, as applicable, serve as trustee (collectively, the “Other Trusts”). With respect to the Other Trusts for which Mr. Connelly serves as trustee, he is required to vote the shares of Contran voting stock held in such trusts in the same manner as Ms. Simmons. Such voting rights of Ms. Simmons last through April 22, 2030 and are personal to Ms. Simmons. The remainder of Contran’s outstanding voting stock is held by another trust (the “Family Trust”), which was established for the benefit of Ms. Simmons and her late sister and their children and for which a third-party financial institution serves as trustee. Consequently, at December 31, 2020, 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.

Our results of operations in 2020 were significantly impacted by the COVID-19 pandemic, primarily in the second and third quarters, specifically through reduced demand for many of our products resulting from the rapid contraction of vast areas of the global economy. The extent of the impact of the COVID-19 pandemic on our future operations will depend on the time period and degree to which the COVID-19 pandemic persists in the global economy, including the timing and extent to which our customers’ operations continue to be impacted, our customers’ perception as to when consumer demand for their products will return to pre-pandemic levels and on any future disruptions in our operations or our suppliers’ operations, all of which are difficult to predict.

Unless otherwise indicated, references in this report to “we,” “us” or “our” refer to Kronos Worldwide, Inc. and its subsidiaries, taken as a whole.

Management’s estimates – In preparing our financial statements in conformity with accounting principles generally accepted in the United States of America (GAAP) we are required to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosure of contingent assets and liabilities at the date of the financial statements, and the reported amount of revenues and expenses during the reporting period. Actual results may differ significantly from previously-estimated amounts under different assumptions or conditions.

Principles of consolidation – The consolidated financial statements include our accounts and those of our majority-owned subsidiaries. We have eliminated all material intercompany accounts and balances.

Translation of currencies – We translate the assets and liabilities of our subsidiaries whose functional currency is other than the U.S. dollar at year-end exchange rates, while we translate our revenues and expenses at average exchange rates prevailing during the year. We accumulate the resulting translation adjustments in stockholders’ equity as part of accumulated other comprehensive loss, net of related deferred income taxes. We recognize currency transaction gains and losses in income currently.

Cash and cash equivalents – We classify bank time deposits and highly-liquid investments with original maturities of three months or less as cash equivalents.

Restricted cash – We classify cash that has been segregated or is otherwise limited in use as restricted. Such restrictions or limitations relate primarily to financial assurance for landfill closure obligations at our Belgium facility and certain Norwegian payroll tax and employee benefit obligations. To the extent the restricted amount relates to a recognized liability, we classify such restricted amount as either a current or noncurrent asset to correspond with the classification of the liability. To the extent the restricted amount does not relate to a recognized liability, we classify restricted cash as a current asset. Restricted cash classified as a current asset and restricted cash classified as a noncurrent asset are presented separately on our Consolidated Balance Sheets.

Marketable securities and securities transactions – We carry marketable securities at fair value. Accounting Standard Codification (ASC) Topic 820, Fair Value Measurements and Disclosures, establishes a consistent framework for measuring fair value and (with certain exceptions) this framework is generally applied to all financial statement items required to be measured at fair value. The standard requires fair value measurements to be classified and disclosed in one of the following three categories:

•

Level 1 – Unadjusted quoted prices in active markets that are accessible at the measurement date for identical, unrestricted assets or liabilities;

•

Level 2 – Quoted prices in markets that are not active, or inputs which are observable, either directly or indirectly, for substantially the full term of the assets or liability; and

•

Level 3 – Prices or valuation techniques that require inputs that are both significant to the fair value measurement and unobservable.

We classify all of our marketable securities as available-for-sale. Unrealized gains or losses on the securities are recognized in Other income (expense) - Marketable equity securities on our Consolidated Statements of Income. We base realized gains and losses upon the specific identification of the securities sold.

See Notes 6 and 10.

Accounts receivable – We provide an allowance for doubtful accounts for known and estimated potential losses arising from sales to customers based on a periodic review of these accounts. See Note 3.

Inventories and cost of sales – We state inventories at the lower of cost or net realizable value, net of allowance for obsolete and slow-moving inventories. We generally base inventory costs for all inventory categories on average cost that approximates the first-in, first-out method. Inventories include the costs for raw materials, the cost to manufacture the raw materials into finished goods and overhead. Depending on the inventory’s stage of completion, our manufacturing costs can include the costs of packing and finishing, utilities, maintenance, depreciation, and salaries and benefits associated with our manufacturing process. We allocate fixed manufacturing overhead costs based on normal production capacity. Unallocated overhead costs resulting from periods with abnormally low production levels are charged to expense as incurred. As inventory is sold to third parties, we recognize the cost of sales in the same period that the sale occurs. We periodically review our inventory for estimated obsolescence or instances when inventory is no longer marketable for its intended use, and we record any write-down equal to the difference between the cost of inventory and its estimated net realizable value based on assumptions about alternative uses, market conditions and other factors. See Note 4.

Investment in TiO₂ manufacturing joint venture – We account for our investment in a 50%-owned manufacturing joint venture by the equity method. Distributions received from such investee are classified for statement of cash flow purposes using the “nature of distribution” approach under ASC Topic 320. See Note 5.

Leases – We enter into various arrangements (or leases) that convey the rights to use and control identified underlying assets for a period of time in exchange for consideration. We lease various manufacturing facilities, land and equipment. From time to time, we may also enter into an arrangement in which the right to use and control an identified underlying asset is embedded in another type of contract.

We determine if an arrangement is a lease (including leases embedded in another type of contract) at inception. All of our leases are classified as operating leases. Operating leases are included in operating lease right-of-use assets, current operating lease liabilities and noncurrent operating lease liabilities on our Consolidated

Balance Sheets. See Note 9. As permitted by ASC Topic 842, Leases, we elected the practical expedients related to nonlease components (in which nonlease components associated with a lease and paid by us to the lessor, such as property taxes, insurance and maintenance, are treated as a lease component and considered part of minimum lease rental payments), and short-term leases (in which leases with an original maturity of 12 months or less are excluded from the recognition requirements of ASC 842).

Right-of-use assets represent our right to use an underlying asset for the lease term and operating lease liabilities represent our obligation to make lease payments arising from the lease. The right-of-use operating lease assets and liabilities are recognized based on the estimated present value of lease payments over the lease term as of the respective lease commencement dates.

We use an estimated incremental borrowing rate to determine the present value of lease payments (unless we can determine the rate implicit in the lease, which is generally not the case). Our incremental borrowing rate for each of our leases is derived from available information, including our current debt and credit facilities and U.S. and European yield curves as well as publicly available data for instruments with similar characteristics, adjusted for factors such as collateralization and term.

Our leases generally do not include termination or purchase options. Certain of our leases include an option to renew the lease after expiration of the initial lease term, but we have not included such renewal periods in our lease term because it is not reasonably certain that we would exercise the renewal option. Our leases generally have fixed lease payments, with no contingent or incentive payments. Certain of our leases include variable lease payments that depend on a specified index or rate. Our lease agreements do not contain any residual value guarantees.

Property and equipment and depreciation – We state property and equipment at cost, including capitalized interest on borrowings during the actual construction period of major capital projects. Capitalized interest costs were $.8 million in 2018, $.6 million in 2019 and $.5 million in 2020. We compute depreciation of property and equipment for financial reporting purposes (including mining equipment) principally by the straight-line method over the estimated useful lives of the assets as follows:

Asset		Useful lives
Buildings and improvements		10 to 40 years
Machinery and equipment		3 to 20 years
Mine development costs		units-of-production

We use accelerated depreciation methods for income tax purposes, as permitted. Upon the sale or retirement of an asset, we remove the related cost and accumulated depreciation from the accounts and recognize any gain or loss in income currently.

We expense costs incurred for maintenance, repairs and minor renewals (including planned major maintenance) while we capitalize expenditures for major improvements.

We have a governmental concession with an unlimited term to operate our ilmenite mines in Norway. Mining properties consist of buildings and equipment used in our Norwegian ilmenite mining operations. While we own the land and ilmenite reserves associated with the mining operations, such land and reserves were acquired for nominal value and we have no material asset recognized for the land and reserves related to our mining operations.

We perform impairment tests when events or changes in circumstances indicate the carrying value may not be recoverable. We consider all relevant factors. We perform the impairment test by comparing the estimated future undiscounted cash flows (exclusive of interest expense) associated with the asset to the asset’s net carrying value to determine if a write-down to fair value is required.

Long-term debt – We state long-term debt net of any unamortized original issue premium, discount or deferred financing costs (other than deferred financing costs associated with revolving credit facilities, which are recognized as an asset). We classify amortization of all deferred financing costs and any premium or discount

associated with the issuance of indebtedness as interest expense and compute such amortization by either the interest method or the straight-line method over the term of the applicable issue. See Note 8.

Employee benefit plans – Accounting and funding policies for our defined benefit pension and defined contribution retirement plans are described in Note 10. We also provide certain postretirement benefits other than pensions (OPEB), consisting of health care and life insurance benefits, to certain U.S. and Canadian retired employees, which are not material. See Note 11.

Income taxes – We, Valhi and our qualifying subsidiaries are members of Contran’s consolidated U.S. federal income tax group (the Contran Tax Group) and we and certain of our qualifying subsidiaries also file consolidated income tax returns with Contran in various U.S. state jurisdictions. As a member of the Contran Tax Group, we are jointly and severally liable for the federal income tax liability of Contran and the other companies included in the Contran Tax Group for all periods in which we are included in the Contran Tax Group. See Note 15. As a member of the Contran Tax Group, we are a party to a tax sharing agreement which provides that we compute our provision for U.S. income taxes on a separate-company basis using the tax elections made by Contran. Pursuant to the tax sharing agreement, we make payments to or receive payments from Valhi in amounts we would have paid to or received from the U.S. Internal Revenue Service or the applicable state tax authority had we not been a member of the Contran Tax Group. We received net refunds of income taxes from Valhi of $1.9 million in 2018 and made net payments of income taxes to Valhi of $10.7 million and $6.6 million in 2019 and 2020, respectively.

We recognize deferred income tax assets and liabilities for the expected future tax consequences of temporary differences between the income tax and financial reporting carrying amounts of assets and liabilities, including investments in our subsidiaries and affiliates who are not members of the Contran Tax Group and undistributed earnings of non-U.S. subsidiaries which are not deemed to be permanently reinvested. At December 31, 2020, we continue to assert indefinite reinvestment as it relates to our outside basis difference attributable to our investments in our non-U.S. subsidiaries, other than post-1986 undistributed earnings of our European subsidiaries and all undistributed earnings of our Canadian subsidiary, which are not subject to permanent reinvestment plans. It is not practical for us to determine the amount of the unrecognized deferred income tax liability related to our investments in our non-U.S. subsidiaries which are permanently reinvested due to the complexities associated with our organizational structure, changes in the Tax Cuts and Jobs Act (2017 Tax Act), and the U.S. taxation of such investments in the states in which we operate. Deferred income tax assets and liabilities for each tax-paying jurisdiction in which we operate are netted and presented as either a noncurrent deferred income tax asset or liability, as applicable. We periodically evaluate our deferred tax assets in the various taxing jurisdictions in which we operate and adjust any related valuation allowance based on the estimate of the amount of such deferred tax assets that we believe does not meet the more-likely-than-not recognition criteria.

The 2017 Tax Act imposed a tax on global intangible low-tax income (GILTI). We record GILTI tax as a current-period expense when incurred under the period cost method. While our future global operations depend on a number of different factors, we do expect to have future U.S. inclusions in taxable income related to GILTI.

We account for the tax effects of a change in tax law as a component of the income tax provision related to continuing operations in the period of enactment, including the tax effects of any deferred income taxes originally established through a financial statement component other than continuing operations (i.e. other comprehensive income). Changes in applicable income tax rates over time as a result of changes in tax law, or times in which a deferred income tax asset valuation allowance is initially recognized in one year and subsequently reversed in a later year, can give rise to “stranded” tax effects in accumulated other comprehensive income in which the net accumulated income tax (benefit) remaining in accumulated other comprehensive income does not correspond to the then-applicable income tax rate applied to the pre-tax amount which resides in accumulated other comprehensive income. As permitted by GAAP, our accounting policy is to remove any such stranded tax effect remaining in accumulated other comprehensive income by recognizing an offset to our provision for income taxes related to continuing operations, only at the time when there is no remaining pre-tax amount in accumulated other comprehensive income. For accumulated other comprehensive income related to currency translation, this would occur only upon the sale or complete liquidation of one of our non-U.S. subsidiaries. For defined pension benefit plans and OPEB plans, this would occur whenever one of our subsidiaries which previously sponsored a defined benefit pension or OPEB plan had terminated such a plan and had no future obligation or plan asset associated with such a plan.

We record a reserve for uncertain tax positions for tax positions where we believe that it is more-likely-than-not our position will not prevail with the applicable tax authorities. The amount of the benefit associated with our uncertain tax positions that we recognize is limited to the largest amount for which we believe the likelihood of realization is greater than 50%. We accrue penalties and interest on the difference between tax positions taken on our tax returns and the amount of benefit recognized for financial reporting purposes. We classify our reserves for uncertain tax positions in a separate current or noncurrent liability, depending on the nature of the tax position. See Note 12.

Net sales – Our sales involve single performance obligations to ship our products pursuant to customer purchase orders. In some cases, the purchase order is supported by an underlying master sales agreement, but our purchase order acceptance generally evidences the contract with our customer by specifying the key terms of product and quantity ordered, price and delivery and payment terms. In accordance with Revenues from Contracts with Customers, (ASC 606), we record revenue when we satisfy our performance obligation to our customers by transferring control of our products to them, which generally occurs at point of shipment or upon delivery. Such transfer of control is also evidenced by transfer of legal title and other risks and rewards of ownership (giving the customer the ability to direct the use of, and obtain substantially all of the benefits of, the product), and our customers becoming obligated to pay us and it is probable we will receive payment. In certain arrangements we provide shipping and handling activities after the transfer of control to our customer (e.g. when control transfers prior to delivery) that are considered fulfillment activities, and accordingly, such costs are accrued when the related revenue is recognized. Sales arrangements with consignment customers occur when our product is shipped to a consignment customer location but we maintain control until the product is used in the customer’s manufacturing process. In these instances, we recognize sales when the consignment customer uses our product, as control of our product has not passed to the customer until that time and all other revenue recognition criteria have been satisfied.

Revenue is recorded in an amount that reflects the net consideration we expect to receive in exchange for our products. Prices for our products are based on terms specified in published list prices and purchase orders, which generally do not include financing components, noncash consideration or consideration paid to our customers. As our standard payment terms are less than one year, we have elected the practical expedient under ASC 606 and have not assessed whether a contract has a significant financing component. We state sales net of price, early payment, and distributor discounts and volume rebates (collectively, variable consideration). Variable consideration, to the extent present, is recognized as the amount to which we are most-likely to be entitled, using all information (historical, current and forecasted) that is reasonably available to us, and only to the extent that a significant reversal in the amount of the cumulative revenue recognized is not probable of occurring in a future period. Differences, if any, between estimates of the amount of variable consideration to which we will be entitled and the actual amount of such variable consideration have not been material in the past. Amounts received or receivable from our customers with respect to variable consideration we expect to refund to our customers is recognized as a current liability and classified as accrued sales discounts and rebates. See Note 9. We report any tax assessed by a governmental authority that we collect from our customers that is both imposed on and concurrent with our revenue-producing activities (such as sales, use, value added and excise taxes) on a net basis (meaning we do not recognize these taxes either in our revenues or in our costs and expenses).

Frequently, we receive orders for products to be delivered over dates that may extend across reporting periods. We invoice for each delivery upon shipment and recognize revenue for each distinct shipment when all sales recognition criteria for that shipment have been satisfied. As scheduled delivery dates for these orders are within a one year period, under the optional exemption provided by ASC 606, we do not disclose sales allocated to future shipments of partially completed contracts.

ASC 606 requires a disaggregation of our sales into categories that depict how the nature, amount, timing and uncertainty of revenue and cash flows are affected by economic factors. We have determined such disaggregation of our sales is the same as the disclosure of our sales by place of manufacture (point of origin) and to the location of the customer (point of destination). See Note 2.

Selling, general and administrative expense; shipping and handling costs – Selling, general and administrative expense includes costs related to marketing, sales, distribution, shipping and handling, research and development, legal and administrative functions such as accounting, treasury and finance, and includes costs for salaries and benefits not associated with our manufacturing process, travel and entertainment, promotional materials

and professional fees. We include shipping and handling costs in selling, general and administrative expense and these costs were $105 million in 2018, $111 million in 2019 and $112 million in 2020. We expense research and development costs as incurred, and these costs were $16 million in 2018, $17 million in 2019 and $16 million in 2020. We expense advertising costs as incurred and these costs were not material in any year presented.

Geographic information

12 Months Ended

Dec. 31, 2020

Segments Geographical Areas [Abstract]

Geographic Information

Note 2 – Geographic information:

Our operations are associated with the production and sale of titanium dioxide pigments (TiO₂). TiO₂ is used to impart whiteness, brightness, opacity and durability to a wide variety of products, including paints, plastics, paper, fibers and ceramics. Additionally, TiO₂is a critical component of everyday applications, such as coatings, plastics and paper, as well as many specialty products such as inks, foods and cosmetics. At December 31, 2019 and 2020, the net assets of non-U.S. subsidiaries included in consolidated net assets approximated $313 million and $319 million, respectively.

For geographic information, we attribute net sales to the place of manufacture (point of origin) and to the location of the customer (point of destination); we attribute property and equipment to their physical location.

	Years ended December 31,
	2018			2019			2020
	(In millions)
Net sales - point of origin:
United States	$	839.4		$	998.5		$	978.8
Germany		886.1			883.6			836.0
Canada		307.2			328.7			319.5
Belgium		272.2			270.7			249.5
Norway		209.6			192.2			211.8
Eliminations		(852.6	)		(942.6	)		(956.8	)
Total	$	1,661.9		$	1,731.1		$	1,638.8

Net sales - point of destination:
Europe	$	817.2		$	823.5		$	783.2
North America		542.0			575.6			569.3
Other		302.7			332.0			286.3
Total	$	1,661.9		$	1,731.1		$	1,638.8

	December 31,
	2019		2020
	(In millions)
Identifiable assets - net property and equipment:
Germany	$	221.9	$	228.2
Belgium		95.3		107.3
Norway		86.3		86.7
Canada		72.3		87.9
Other		14.8		14.5
Total	$	490.6	$	524.6

Accounts and Other Receivables, Net

12 Months Ended

Dec. 31, 2020

Receivables [Abstract]

Accounts and Other Receivables, Net

Note 3 – Accounts and other receivables, net:

	December 31,
	2019			2020
	(In millions)
Trade receivables	$	270.5		$	294.8
Recoverable VAT and other receivables		25.4			21.3
Refundable income taxes		7.7			5.3
Allowance for doubtful accounts		(1.1	)		(1.9	)
Total	$	302.5		$	319.5

Inventories, Net

12 Months Ended

Dec. 31, 2020

Inventory Disclosure [Abstract]

Inventories, Net

Note 4 – Inventories, net:

	December 31,
	2019		2020
	(In millions)
Raw materials	$	124.4	$	133.2
Work in process		39.0		36.8
Finished products		269.9		269.2
Supplies		69.7		79.8
Total	$	503.0	$	519.0

Investment in TiO2 Manufacturing Joint Venture

12 Months Ended

Dec. 31, 2020

Equity Method Investments And Joint Ventures [Abstract]

Investment in TiO2 Manufacturing Joint Venture

Note 5 – Investment in TiO₂ manufacturing joint venture:

We own a 50% interest in Louisiana Pigment Company, L.P. (LPC). LPC is a manufacturing joint venture whose other 50%-owner is Venator Investments LLC (Venator Investments). Venator Investments is a wholly-owned subsidiary of Venator Group, of which Venator Materials PLC owns 100% and is the ultimate parent. LPC owns and operates a chloride-process TiO₂ plant near Lake Charles, Louisiana.

We and Venator Investments are both required to purchase one-half of the TiO₂ produced by LPC, unless we and Venator Investments agree otherwise. LPC operates on a break-even basis and, accordingly, we report no equity in earnings of LPC. Each owner’s acquisition transfer price for its share of the TiO₂ produced is equal to its share of the joint venture’s production costs and interest expense, if any. Our share of net cost is reported as cost of sales as the related TiO₂ acquired from LPC is sold. We report distributions we receive from LPC, which generally relate to excess cash generated by LPC from its non-cash production costs, and contributions we make to LPC, which generally relate to cash required by LPC when it builds working capital, as part of our cash flows from operating activities in our Consolidated Statements of Cash Flows. The components of our net cash distributions from (contributions to) LPC are shown in the table below.

	Years ended December 31,
	2018			2019			2020
	(In millions)
Distributions from LPC	$	34.3		$	40.6		$	32.7
Contributions to LPC		(30.3	)		(49.9	)		(45.5	)
Net distributions (contributions)	$	4.0		$	(9.3	)	$	(12.8	)

Summary balance sheets of LPC are shown below:

	December 31,
	2019		2020
	(In millions)
ASSETS
Current assets	$	94.6	$	105.8
Property and equipment, net		121.3		134.1
Total assets	$	215.9	$	239.9

LIABILITIES AND PARTNERS' EQUITY
Other liabilities, primarily current	$	32.8	$	30.6
Partners' equity		183.1		209.3
Total liabilities and partners' equity	$	215.9	$	239.9

Summary income statements of LPC are shown below:

	Years ended December 31,
	2018		2019		2020
	(In millions)
Revenues and other income:
Kronos	$	165.9	$	176.2	$	167.8
Venator Investments		167.0		177.0		168.3
Total revenues and other income		332.9		353.2		336.1

Cost and expenses:
Cost of sales		332.5		352.8		335.7
General and administrative		.4		.4		.4
Total costs and expenses		332.9		353.2		336.1
Net income	$	-	$	-	$	-

We have certain related party transactions with LPC, as more fully described in Note 14.

Marketable Securities

12 Months Ended

Dec. 31, 2020

Investments Debt And Equity Securities [Abstract]

Marketable Securities

Note 6 – 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. Unrealized gains or losses on the securities are recognized in Other income (expense) - Marketable equity securities on our Consolidated Statements of Income.

Marketable security	Fair value measurement level	Market value		Cost basis		Unrealized loss
		(In millions)
December 31, 2019:
Valhi common stock	1	$	3.2	$	3.2	$	-
NL and CompX common stocks	1		.1		.1		-
Total		$	3.3	$	3.3	$	-

December 31, 2020:
Valhi common stock	1	$	2.1	$	3.2	$	(1.1	)
NL and CompX common stocks	1		.1		.1		-
Total		$	2.2	$	3.3	$	(1.1	)

At December 31, 2019 and 2020, we held approximately 144,000 shares of Valhi’s common stock. The per share quoted market price of Valhi’s common stock was $22.44 and $15.20, at December 31, 2019 and 2020, respectively. Valhi implemented a reverse split of its common stock at a ratio of 1-for-12 effective on June 1, 2020. We have adjusted all share and per-share disclosures related to our investment in Valhi stock for all periods prior to June 2020 to give effect to the reverse stock split. The reverse stock split had no financial statement impact to us, and our ownership interest in Valhi did not change as a result of the split. We also held a nominal number of shares of CompX and NL common stocks.

The Valhi, CompX and NL common stocks we own are 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.

Leases

12 Months Ended

Dec. 31, 2020

Leases [Abstract]

Leases

Note 7 – Leases:

We enter into various operating leases for manufacturing facilities, land and equipment. Our operating leases are included in operating lease right-of-use assets, current operating lease liabilities and noncurrent operating lease liabilities on our Consolidated Balance Sheets. See Note 9. Our principal German operating subsidiary leases the land under its Leverkusen TiO₂ production facility pursuant to a lease with Bayer AG that expires in 2050. The Leverkusen facility itself, which we own and which represents approximately one-third of our current TiO₂ production capacity, is located within Bayer’s extensive manufacturing complex.

During 2019 and 2020, our operating lease expense approximated $8.2 million and $7.6 million, respectively (which amounts approximate the amount of cash paid during each year for our operating leases included in the determination of our cash flows from operating activities). During 2019 and 2020, variable lease expense and short-term lease expense were not material. During 2019 and 2020, we entered into new operating leases which resulted in the recognition of $1.6 million and $2.5 million, respectively, in right-of-use operating lease assets and corresponding liabilities on our Consolidated Balance Sheets. At December 31, 2019 and 2020, the weighted average remaining lease term of our operating leases was approximately 14 years and 15 years, respectively, and the weighted average discount rate associated with such leases was approximately 4.6% and 4.8%, respectively. Such average remaining lease term is weighted based on each arrangement’s lease obligation, and such average discount rate is weighted based on each arrangement’s total remaining lease payments.

At December 31, 2020, maturities of our operating lease liabilities were as follows:

Years ending December 31,	Amount
	(In millions)
2021	$	7.4
2022		4.1
2023		2.7
2024		1.8
2025		1.3
2026 and thereafter		20.1
Total remaining lease payments		37.4
Less imputed interest		11.9
Total lease obligations		25.5
Less current obligations		6.7
Long term lease obligations	$	18.8

With respect to our land lease associated with our Leverkusen facility, we periodically establish the amount of rent for such land lease by agreement with Bayer for periods of at least two years at a time. The lease agreement provides for no formula, index or other mechanism to determine changes in the rent of such land lease; rather, any change in the rent is subject solely to periodic negotiation between Bayer and us. As such, we will account for any change in the rent associated with such lease as a lease modification. Of the $25.5 million total lease obligations at December 31, 2020, $7.6 million relates to our Leverkusen facility land lease.

At December 31, 2020, we have no significant lease commitments that have not yet commenced.

Prior to adoption of ASC 842, net rent expense approximated $15 million in 2018.

Long-Term debt

12 Months Ended

Dec. 31, 2020

Debt Disclosure [Abstract]

Long-Term Debt

Note 8 – Long-term debt:

	December 31,
	2019		2020
	(In millions)
Kronos International, Inc. 3.75% Senior Notes	$	442.6	$	485.7
Other		2.9		1.7
Total debt		445.5		487.4
Less current maturities		1.5		.7
Total long-term debt	$	444.0	$	486.7

Senior Notes – On September 13, 2017, Kronos International, Inc. (KII), our wholly-owned subsidiary, issued €400 million aggregate principal amount of its 3.75% Senior Secured Notes due September 15, 2025 (Senior Notes), at par value ($477.6 million when issued). The Senior Notes:

•

bear interest at 3.75% per annum, payable semi-annually on March 15 and September 15 of each year, payments began on March 15, 2018;

•

have a maturity date of September 15, 2025. Prior to September 15, 2020, we had an option to redeem some or all of the Senior Notes at a price equal to 100% of the principal amount thereof, plus a “make-whole” premium (as defined in the indenture governing the Senior Notes) but we did not elect the option. On or after September 15, 2020, we may redeem the Senior Notes at redemption prices ranging from 102.813% of the principal amount, declining to 100% on or after September 15, 2023. In addition, on or before September 15, 2020, we had an option to redeem up to 40% of the Senior Notes with the net proceeds of certain public or private equity offerings at 103.75% of the principal amount but we did not elect this option. If we experience certain specified change of control events, we would be required to make an offer to purchase the Senior Notes at 101% of the principal amount. We would also be required to make an offer to purchase a specified portion of the Senior Notes at par value in the event that we generate a certain amount of net proceeds from the sale of assets outside the ordinary

course of business, and such net proceeds are not otherwise used for specified purposes within a specified time period;

•

are fully and unconditionally guaranteed, jointly and severally, on a senior secured basis by Kronos Worldwide, Inc. and each of our direct and indirect domestic, wholly-owned subsidiaries;

•

are collateralized by a first priority lien on (i) 100% of the common stock or other ownership interests of each existing and future direct domestic subsidiary of KII and the guarantors, and (ii) 65% of the voting common stock or other ownership interests and 100% of the non-voting common stock or other ownership interests of each non-U.S. subsidiary that is directly owned by KII or any guarantor;

•

contain a number of covenants and restrictions which, among other things, restrict our ability to incur or guarantee additional debt, incur liens, pay dividends or make other restricted payments, or merge or consolidate with, or sell or transfer substantially all of our assets to, another entity, and contain other provisions and restrictive covenants customary in lending transactions of this type (however, there are no ongoing financial maintenance covenants); and

•

contain customary default provisions, including a default under any of our other indebtedness in excess of $50.0 million.

The carrying value of the Senior Notes at December 31, 2020 is stated net of unamortized debt issuance costs of $4.7 million (December 31, 2019 - $5.3 million).

Revolving credit facilities

Revolving North American credit facility – We have a $125 million revolving bank credit facility that, as amended, matures in January 2022. Borrowings under the revolving credit facility are available for our general corporate purposes. Available borrowings on this facility are based on formula-determined amounts of eligible trade receivables and inventories, as defined in the agreement, of certain of our North American subsidiaries less any outstanding letters of credit up to $15 million issued under the facility (with revolving borrowings by our Canadian subsidiary limited to $25 million). Any amounts outstanding under the revolving credit facility bear interest, at our option, at LIBOR plus a margin ranging from 1.5% to 2.0% or at the applicable base rate, as defined in the agreement, plus a margin ranging from .5% to 1.0%. The credit facility is collateralized by, among other things, a first priority lien on the borrowers’ trade receivables and inventories. The facility contains a number of covenants and restrictions which, among other things, restricts the borrowers’ ability to incur additional debt, incur liens, pay dividends or merge or consolidate with, or sell or transfer all or substantially all of their assets to, another entity, contains other provisions and restrictive covenants customary in lending transactions of this type and under certain conditions requires the maintenance of a specified financial covenant (fixed charge coverage ratio, as defined) to be at least 1.0 to 1.0.

We had no borrowings or repayments under this facility in 2019 and 2020. At December 31, 2020, there were no outstanding borrowings under this facility and we had $107.6 million available for borrowing under this revolving facility.

Revolving European credit facility – Our operating subsidiaries in Germany, Belgium, Norway and Denmark have a €90 million secured revolving bank credit facility that, as amended, matures in September 2022. Outstanding borrowings bear interest at the Euro Interbank Offered Rate (EURIBOR) plus 1.60% per annum. The facility is collateralized by the accounts receivable and inventories of the borrowers, plus a limited pledge of all of the other assets of the Belgian borrower. The facility contains certain restrictive covenants that, among other things, restricts the ability of the borrowers to incur debt, incur liens, pay dividends or merge or consolidate with, or sell or transfer all or substantially all of the assets to, another entity, and requires the maintenance of certain financial ratios. In addition, the credit facility contains customary cross-default provisions with respect to other debt and obligations of the borrowers, KII and its other subsidiaries.

We had no borrowings or repayments under this facility during 2019 and 2020 and at December 31, 2020, there were no outstanding borrowings under this facility. Our European revolving credit facility requires the maintenance of certain financial ratios, and one of such requirements is based on the ratio of net debt to last twelve months earnings before interest, income tax, depreciation and amortization expense (EBITDA) of the borrowers. Based upon the borrowers’ last twelve months EBITDA as of December 31, 2020 and the net debt to EBITDA financial test, the full €90 million amount of this facility ($110.3 million) was available for borrowing at December 31, 2020.

Aggregate maturities and other – Aggregate maturities of debt at December 31, 2020 are presented in the table below.

Years ending December 31,	Amount
	(In millions)
2021	$	.7
2022		.7
2023		.3
2024		-
2025		490.4
2026 and thereafter		-
Gross maturities		492.1
Less debt issuance costs		4.7
Total	$	487.4

We are in compliance with all of our debt covenants at December 31, 2020.

Accounts Payable and Accrued Liabilities

12 Months Ended

Dec. 31, 2020

Payables And Accruals [Abstract]

Accounts Payable and Accrued Liabilities

Note 9 – Accounts payable and accrued liabilities:

	December 31,
	2019		2020
	(In millions)
Accounts payable	$	137.2	$	111.0
Accrued sales discounts and rebates		32.4		29.1
Employee benefits		21.1		27.8
Operating lease liabilities		6.2		6.7
Other		40.8		41.3
Total	$	237.7	$	215.9

Defined Contribution and Defined Benefit Retirement Plans

12 Months Ended

Dec. 31, 2020

Compensation And Retirement Disclosure [Abstract]

Defined Contribution and Defined Benefit Retirement Plans

Note 10 – Defined contribution and defined benefit retirement plans:

Defined contribution plans – We maintain various defined contribution pension plans with our contributions based on matching or other formulas. Defined contribution plan expense approximated $3.3 million in 2018, $3.1 million in 2019 and $3.4 million in 2020.

Defined benefit pension plans – We sponsor various defined benefit pension plans. Certain non-U.S. employees are covered by plans in their respective countries. Our U.S. plan was closed to new participants in 1996, and existing participants no longer accrue any additional benefits after that date. The benefits under all of our defined benefit pension plans are based upon years of service and employee compensation. Our funding policy is to contribute annually the minimum amount required under ERISA (or equivalent non-U.S.) regulations plus additional amounts as we deem appropriate. We recognize an asset or liability for the over or under funded status of each of our individual defined benefit pension plans on our Consolidated Balance Sheets. Changes in the funded status of these plans are recognized either in net income, to the extent they are reflected in periodic benefit cost, or through other comprehensive income (loss).

We expect to contribute the equivalent of approximately $17 million to all of our defined benefit pension plans during 2021. Benefit payments to plan participants out of plan assets are expected to be the equivalent of:

Years ending December 31,	Amount
	(In millions)
2021	$	23.5
2022		24.9
2023		24.7
2024		26.7
2025		26.8
Next 5 years		159.5

The funded status of our non-U.S. defined benefit pension plans is presented in the table below.

	December 31,
	2019			2020
	(In millions)
Change in projected benefit obligations (PBO):
Benefit obligations at beginning of the year	$	658.7		$	738.2
Service cost		12.8			13.3
Interest cost		13.3			10.0
Participant contributions		1.6			1.8
Actuarial losses		81.5			46.6
Settlements		(1.0	)		-
Change in currency exchange rates		(7.2	)		58.6
Benefits paid		(21.5	)		(21.8	)
Benefit obligations at end of the year		738.2			846.7

Change in plan assets:
Fair value of plan assets at beginning of the year		400.3			437.5
Actual return on plan assets		45.1			18.7
Employer contributions		15.3			16.0
Participant contributions		1.6			1.8
Settlements		(1.0	)		-
Change in currency exchange rates		(2.3	)		29.6
Benefits paid		(21.5	)		(21.8	)
Fair value of plan assets at end of year		437.5			481.8
Funded status	$	(300.7	)	$	(364.9	)

Amounts recognized in the balance sheet:
Noncurrent pension asset	$	3.1		$	4.5
Noncurrent accrued pension costs		(303.8	)		(369.4	)
Total	$	(300.7	)	$	(364.9	)

Amounts recognized in accumulated other comprehensive loss:
Actuarial losses	$	285.3		$	304.5
Prior service cost		1.0			.8
Total	$	286.3		$	305.3

Accumulated benefit obligations (ABO)	$	712.2		$	819.7

The total net underfunded status of our non-U.S. defined benefit pension plans increased from $300.7 million at December 31, 2019 to $364.9 million at December 31, 2020 due to the change in our PBO during 2020 exceeding the change in plan assets during 2020. The increase in our PBO in 2020 was primarily attributable to actuarial losses due to the decrease in discount rates from year end 2019 and unfavorable currency fluctuations resulting primarily from the weakening of the U.S. dollar relative to the euro. The increase in our plan assets in 2020 was primarily attributable to net plan asset returns in 2020, employer contributions and favorable currency fluctuations resulting primarily from the weakening of the U.S. dollar relative to the euro.

The components of our net periodic defined benefit pension cost for our non-U.S. defined benefit pension plans are presented in the table below. The amounts shown below for the amortization of prior service cost and recognized actuarial losses for 2018, 2019 and 2020 were recognized as components of our accumulated other comprehensive loss at December 31, 2017, 2018 and 2019, respectively, net of deferred income taxes.

	Years ended December 31,
	2018			2019			2020
	(In millions)
Net periodic pension cost (income):
Service cost benefits	$	11.6		$	12.8		$	13.3
Interest cost on PBO		13.5			13.3			10.0
Expected return on plan assets		(12.0	)		(11.7	)		(8.7	)
Recognized actuarial losses		13.1			12.8			17.3
Amortization of prior service cost		.2			.2			.2
Total	$	26.4		$	27.4		$	32.1

Information concerning certain of our non-U.S. defined benefit pension plans (for which the ABO exceeds the fair value of plan assets as of the indicated date) is presented in the table below.

	December 31,
	2019		2020
	(In millions)
Plans for which the ABO exceeds plan assets:
PBO	$	685.4	$	790.9
ABO		663.3		768.1
Fair value of plan assets		381.7		421.5

The weighted-average rate assumptions used in determining the actuarial present value of benefit obligations for our non-U.S. defined benefit pension plans as of December 31, 2019 and 2020 are presented in the table below.

	December 31,
Rate	2019			2020
Discount rate		1.4	%		1.0	%
Increase in future compensation levels		2.6	%		2.6	%

The weighted-average rate assumptions used in determining the net periodic pension cost for our non-U.S. defined benefit pension plans for 2018, 2019 and 2020 are presented in the table below.

	Years ended December 31,
Rate	2018			2019			2020
Discount rate		2.1	%		2.1	%		1.4	%
Increase in future compensation levels		2.6	%		2.6	%		2.6	%
Long-term return on plan assets		2.9	%		2.9	%		2.0	%

Variances from actuarially assumed rates will result in increases or decreases in accumulated pension obligations, pension expense and funding requirements in future periods.

The funded status of our U.S. defined benefit pension plan is presented in the table below.

	December 31,
	2019			2020
	(In millions)
Change in PBO:
Benefit obligations at beginning of the year	$	16.9		$	18.3
Interest cost		.7			.6
Actuarial losses		1.8			1.6
Benefits paid		(1.1	)		(1.1	)
Benefit obligations at end of the year		18.3			19.4

Change in plan assets:
Fair value of plan assets at beginning of the year		13.1			14.6
Actual return on plan assets		1.7			2.0
Employer contributions		.9			.6
Benefits paid		(1.1	)		(1.1	)
Fair value of plan assets at end of year		14.6			16.1
Funded status	$	(3.7	)	$	(3.3	)

Amounts recognized in the balance sheet:
Accrued pension costs:
Current	$	(.1	)	$	(.1	)
Noncurrent		(3.6	)		(3.2	)
Total	$	(3.7	)	$	(3.3	)

Amounts recognized in accumulated other comprehensive loss - actuarial losses	$	11.3		$	10.9

ABO	$	18.3		$	19.4

The components of our net periodic defined benefit pension cost for our U.S. defined benefit pension plan is presented in the table below. The amounts shown below for recognized actuarial losses for 2018, 2019 and 2020 were recognized as components of our accumulated other comprehensive loss at December 31, 2017, 2018 and 2019 respectively, net of deferred income taxes.

	Years ended December 31,
	2018			2019			2020
	(In millions)
Net periodic pension cost (income):
Interest cost on PBO	$	.6		$	.7		$	.6
Expected return on plan assets		(1.0	)		(.7	)		(.6	)
Recognized actuarial losses		.6			.6			.6
Total	$	.2		$	.6		$	.6

The discount rate assumptions used in determining the actuarial present value of the benefit obligation for our U.S. defined benefit pension plan as of December 31, 2019 and 2020 are 3.1% and 2.2%, respectively. The impact of assumed increases in future compensation levels does not have an effect on the benefit obligation as the plan is frozen with regards to compensation.

The weighted-average rate assumptions used in determining the net periodic pension cost for our U.S. defined benefit pension plan for 2018, 2019 and 2020 are presented in the table below. The impact of assumed increases in future compensation levels also does not have an effect on the periodic pension cost as the plan is frozen with regards to compensation.

	Years ended December 31,
Rate	2018			2019			2020
Discount rate		3.5	%		4.1	%		3.1	%
Long-term return on plan assets		7.5	%		5.5	%		4.5	%

Variances from actuarially assumed rates will result in increases or decreases in accumulated pension obligations, pension expense and funding requirements in future periods.

The amounts shown in the tables above for actuarial losses and prior service cost at December 31, 2019 and 2020 have not yet been recognized as components of our periodic defined benefit pension cost as of those dates. These amounts will be recognized as components of our periodic defined benefit cost in future years and are recognized, net of deferred income taxes, in our accumulated other comprehensive loss at December 2019 and 2020.

The table below details the changes in our consolidated other comprehensive income (loss) during 2018, 2019 and 2020.

	Years ended December 31,
	2018			2019			2020
	(In millions)
Changes in plan assets and benefit obligations recognized in other comprehensive income (loss):
Current year:
Net actuarial losses	$	(24.3	)	$	(48.5	)	$	(36.8	)
Amortization of unrecognized:
Net actuarial losses		13.7			13.4			17.9
Prior service cost		.2			.2			.2
Total	$	(10.4	)	$	(34.9	)	$	(18.7	)

Prior to 2018, substantially all of the assets attributable to our U.S. plan were invested in the Combined Master Retirement Trust (CMRT), a collective investment trust sponsored by Contran to permit the collective investment by certain master trusts that fund certain employee benefit plans sponsored by Contran and certain of its affiliates, including us. For 2018, the long-term rate of return assumption for our U.S. plan assets was 7.5%, based on the long-term asset mix of the assets of the CMRT and the expected long-term rates of return for such asset components as well as advice from Contran’s actuaries. During 2018, Contran and the other employer-sponsors (including us) implemented a restructuring of the CMRT, in which a substantial part of each plan’s units in the CMRT were redeemed in exchange for a pro-rata portion of a substantial part of the CMRT’s investments. Following such restructuring, the plans held directly in the aggregate the investments previously held directly by the CMRT which had been exchanged for CMRT units as part of the restructuring. Certain investments held directly by the CMRT that were not part of such restructuring remained investments of the CMRT at December 31, 2018. During 2019, the remaining investments of the CMRT allocable to our U.S. plan were transferred and are held as direct investments of our U.S. plan at December 31, 2019 and December 31, 2020. Such restructuring was implemented in part so each plan could more easily align the composition of its plan asset portfolio with the plan’s benefit obligations.

In determining the expected long-term rate of return on our U.S. and non-U.S. plan asset assumptions, we consider the long-term asset mix (e.g. equity vs. fixed income) for the assets for each of our plans and the expected long-term rates of return for such asset components. In addition, we receive third-party advice about appropriate long-term rates of return. Such assumed asset mixes are summarized below:

•

In Germany, the composition of our plan assets is established to satisfy the requirements of the German insurance commissioner. Our German pension plan assets represent an investment in a large

collective investment fund established and maintained by Bayer AG in which several pension plans, including our German pension plans and Bayer’s pension plans, have invested. Our plan assets represent a very nominal portion of the total collective investment fund maintained by Bayer. These plan assets are a Level 3 in the fair value hierarchy because there is not an active market that approximates the value of our investment in the Bayer investment fund. We estimate the fair value of the Bayer plan assets based on periodic reports we receive from the managers of the Bayer fund and using a model we developed with assistance from our third-party actuary that uses estimated asset allocations and correlates such allocation to similar asset mixes in fund indexes quoted on an active market. We periodically evaluate the results of our valuation model against actual returns in the Bayer fund and adjust the model as needed. The Bayer fund periodic reports are subject to audit by the German pension regulator.

•

In Canada, we currently have a plan asset target allocation of 20-30% to equity securities and 70-80% to fixed income securities. We expect the long-term rate of return for such investments to approximate the applicable average equity or fixed income index. The Canadian assets are Level 1 inputs because they are traded in active markets.

•

In Norway, we currently have a plan asset target allocation of 15% to equity securities, 62% to fixed income securities, 14% to real estate and the remainder primarily to other investments and liquid investments such as money markets. The expected long-term rate of return for such investments is approximately 5%, 3%, 4% and 7%, respectively. The majority of Norwegian plan assets are Level 1 inputs because they are traded in active markets; however approximately 14% of our Norwegian plan assets are invested in real estate and other investments not actively traded and are therefore a Level 3 input.

•

In the U.S. we currently have a plan asset target allocation of 38% to equity securities, 54% to fixed income securities, and the remainder is allocated to multi-asset strategies. The expected long-term rate of return for such investments is approximately 9%, 3% and 2%, respectively (before plan administrative expenses). The majority of U.S. plan assets are Level 1 inputs because they are traded in active markets and approximately 34% of our U.S. plan assets are invested in funds that are valued at net asset value (NAV) and, in accordance with ASC 820-10, not subject to classification in the fair value hierarchy.

•

We also have plan assets in Belgium and the United Kingdom. The Belgium plan assets are invested in certain individualized fixed income insurance contracts for the benefit of each plan participant as required by the local regulators and are therefore a Level 3 input. The United Kingdom plan assets consist of marketable securities which are Level 1 inputs because they trade in active markets.

We regularly review our actual asset allocation for each plan and will periodically rebalance the investments in each plan to more accurately reflect the targeted allocation and/or maximize the overall long-term return when considered appropriate.

The composition of our pension plan assets by asset category and fair value level at December 31, 2019 and 2020 is shown in the tables below.

	Fair Value Measurements at December 31, 2019
	Total		Quoted prices in active markets (Level 1)		Significant other observable inputs (Level 2)		Significant unobservable inputs (Level 3)		Assets measured at NAV
	(In millions)
Germany	$	264.5	$	-	$	-	$	264.5	$	-
Canada:
Local currency equities		8.3		8.3		-		-		-
Non local currency equities		16.3		16.3		-		-		-
Local currency fixed income		80.9		80.9		-		-		-
Cash and other		.6		.6		-		-		-
Norway:
Local currency equities		1.6		1.6		-		-		-
Non local currency equities		4.2		4.2		-		-		-
Local currency fixed income		22.8		14.1		8.7		-		-
Non local currency fixed income		8.3		8.3		-		-		-
Real estate		6.6		-		-		6.6		-
Cash and other		8.2		7.4		-		.8		-
U.S.:
Equities		5.8		1.6		-		.2		4.0
Fixed income		7.0		7.0		-		-		-
Cash and other		1.8		1.4		-		-		.4
Other		15.2		4.2		-		11.0		-
Total	$	452.1	$	155.9	$	8.7	$	283.1	$	4.4

	Fair Value Measurements at December 31, 2020
	Total		Quoted prices in active markets (Level 1)		Significant other observable inputs (Level 2)		Significant unobservable inputs (Level 3)		Assets measured at NAV
	(In millions)
Germany	$	292.5	$	-	$	-	$	292.5	$	-
Canada:
Local currency equities		.2		.2		-		-		-
Non local currency equities		26.6		26.6		-		-		-
Local currency fixed income		87.3		87.3		-		-		-
Cash and other		.9		.9		-		-		-
Norway:
Local currency equities		3.2		3.2		-		-		-
Non local currency equities		6.3		6.3		-		-		-
Local currency fixed income		26.4		16.3		10.1		-		-
Non local currency fixed income		7.7		7.7		-		-		-
Real estate		7.1		-		-		7.1		-
Cash and other		5.5		4.8		-		.7		-
U.S.:
Equities		6.3		.9		-		.2		5.2
Fixed income		8.1		8.1		-		-		-
Cash and other		1.7		1.3		-		-		.4
Other		18.1		4.3		-		13.8		-
Total	$	497.9	$	167.9	$	10.1	$	314.3	$	5.6

A rollforward of the change in fair value of Level 3 assets follows.

	December 31,
	2019			2020
	(In millions)
Fair value at beginning of year	$	258.0		$	283.1
Gain on assets held at end of year		30.2			4.2
Gain on assets sold during the year		.1			-
Assets purchased		16.0			14.4
Assets sold		(14.9	)		(14.1	)
Currency exchange rate fluctuations		(6.3	)		26.7
Fair value at end of year	$	283.1		$	314.3

- Definition

The entire disclosure for retirement benefits.

+ References

Reference 1: http://www.xbrl.org/2003/role/exampleRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 715
-SubTopic 20
-Section 55
-Paragraph 17
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+ Details

Other Noncurrent Liabilities

12 Months Ended

Dec. 31, 2020

Other Liabilities Disclosure [Abstract]

Other Noncurrent Liabilities

Note 11 – Other noncurrent liabilities:

	December 31,
	2019		2020
	(In millions)
Accrued postretirement benefits	$	8.0	$	8.7
Employee benefits		6.0		6.2
Other		14.2		11.8
Total	$	28.2	$	26.7

We recorded an immaterial out-of-period adjustment of $3.9 million ($2.9 million net of income taxes) in the fourth quarter of 2020 to correct the overstatement of a noncurrent liability related to water control and monitoring activities.

Income Taxes

12 Months Ended

Dec. 31, 2020

Income Tax Disclosure [Abstract]

Income Taxes

Note 12 – Income taxes:

	Years ended December 31,
	2018			2019			2020
	(In millions)
Pre-tax income:
U.S.	$	32.8		$	37.9		$	20.9
Non-U.S.		261.0			83.2			59.1
Total	$	293.8		$	121.1		$	80.0

Expected tax expense, at U.S. federal statutory income tax rate of 21%	$	61.7		$	25.4		$	16.8
Non-U.S. tax rates		21.0			5.4			.7
Incremental net tax expense (benefit) on earnings and losses of U.S. and non-U.S. companies		1.3			(4.3	)		(5.5	)
Valuation allowance		-			.7			.8
Transition Tax		(1.7	)		-			-
Global intangible low-tax income, net		3.7			2.4			2.7
Tax rate changes		(.2	)		5.5			(.3	)
Canada - Germany APA		(1.4	)		-			-
Refund of prior tax payments, net		-			(2.1	)		(.1	)
Adjustment to the reserve for uncertain tax positions, net		2.1			.7			.1
Nondeductible expenses		1.6			1.4			.9
U.S. state income taxes and other, net		.7			(1.1	)		-
Income tax expense	$	88.8		$	34.0		$	16.1

Components of income tax expense:
Current payable:
U.S. federal and state	$	12.0		$	5.5		$	4.8
Non-U.S.		51.1			21.9			14.9
		63.1			27.4			19.7

Noncurrent payable - U.S. federal		(1.6	)		-			-

Deferred income taxes (benefit):
U.S. federal and state		(1.8	)		.8			(2.6	)
Non-U.S.		29.1			5.8			(1.0	)
		27.3			6.6			(3.6	)
Income tax expense	$	88.8		$	34.0		$	16.1

Comprehensive provision for income taxes allocable to:
Net income	$	88.8		$	34.0		$	16.1
Other comprehensive income (loss):
Pension plans		(3.6	)		(13.7	)		(6.0	)
OPEB plans		(.2	)		(.2	)		(.2	)
Total	$	85.0		$	20.1		$	9.9

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 subsidiary is subject to U.S. income tax under the U.S. dual-resident provisions of the Internal Revenue Code.

The components of our net deferred income taxes at December 31, 2019 and 2020 are summarized in the following table.

	December 31,
	2019						2020
	Assets			Liabilities			Assets			Liabilities
	(In millions)
Tax effect of temporary differences related to:
Inventories	$	3.5		$	-		$	1.7		$	-
Property and equipment		-			(51.6	)		-			(58.4	)
Lease assets (liabilities)		5.9			(6.1	)		6.4			(6.5	)
Accrued OPEB costs		2.2			-			2.4			-
Accrued pension costs		79.8			-			100.0			-
Other accrued liabilities and deductible differences		9.3			-			11.7			-
Other taxable differences		-			(1.7	)		-			(1.4	)
Tax on unremitted earnings of non-U.S. subsidiaries		-			(10.8	)		-			(12.0	)
Tax loss and tax credit carryforwards		80.0			-			86.9			-
Valuation allowance		(3.5	)		-			(4.4	)		-
Adjusted gross deferred tax assets (liabilities)		177.2			(70.2	)		204.7			(78.3	)
Netting by tax jurisdiction		(49.5	)		49.5			(53.7	)		53.7
Net noncurrent deferred tax asset (liability)	$	127.7		$	(20.7	)	$	151.0		$	(24.6	)

We have substantial net operating loss (NOL) carryforwards in Germany (the equivalent of $531 million for German corporate tax purposes at December 31, 2020) and in Belgium (the equivalent of $20 million for Belgian corporate tax purposes at December 31, 2020). At December 31, 2020, we have concluded that no deferred income tax asset valuation allowance is required to be recognized with respect to such carryforwards, principally because (i) such carryforwards have an indefinite carryforward period, (ii) we have utilized a portion of such carryforwards during the most recent three-year period and (iii) we currently expect to utilize the remainder of such carryforwards over the long term. However, prior to the complete utilization of such carryforwards, if we were to generate additional losses in our German or Belgian operations for an extended period of time, or if applicable law were to change such that the carryforward period was no longer indefinite, it is possible that we might conclude the benefit of such carryforwards would no longer meet the more-likely-than-not recognition criteria, at which point we would be required to recognize a valuation allowance against some or all of the then-remaining tax benefit associated with the carryforwards.

Prior to the enactment of the 2017 Tax Act, the undistributed earnings of our European subsidiaries were deemed to be permanently reinvested (we had not made a similar determination with respect to the undistributed earnings of our Canadian subsidiary). Pursuant to the one-time repatriation tax (Transition Tax) provisions of the 2017 Tax Act which imposed a one-time repatriation tax on post-1986 undistributed earnings, we recognized a provisional current income tax expense of $76.2 million in the fourth quarter of 2017 based on information available at that date. During the third quarter of 2018, in conjunction with finalizing our federal income tax return and based on additional information that became available (including proposed regulations issued by the IRS in August 2018

with respect to the Transition Tax), we recognized a provisional income tax benefit of $1.7 million which amount is recorded as a measurement-period adjustment, reducing the provisional income tax expense recognized in the fourth quarter of 2017. We elected to pay such tax over an eight year period beginning in 2018. At December 31, 2020, the balance of our unpaid Transition Tax is $56.6 million, which will be paid in annual installments over the remainder of the eight year period. Of such $56.6 million, $50.6 million is recorded as a noncurrent payable to affiliate (income taxes payable to Valhi) classified as a noncurrent liability on our Consolidated Balance Sheet at December 31, 2020, and $6.0 million is included with our current payable to affiliate (income taxes payable to Valhi) classified as a current liability (a portion of our noncurrent income tax payable to affiliate was reclassified to our current payable to affiliate for the portion of our 2020 Transition Tax installment due within the next twelve months).

In the fourth quarter of 2019, we recognized an income tax benefit of $3.0 million primarily related to the favorable settlement of a prior year tax matter in Germany, with $1.5 million recognized as a current cash tax benefit and $1.5 million recognized as a non-cash deferred income tax benefit related to an increase to our German net operating loss carryforward. In addition, we recognized a non-cash deferred income tax expense of $5.5 million primarily related to the revaluation of our net deferred income tax asset in Germany resulting from a decrease in the German trade tax rate.

As a result of prior audits in certain jurisdictions, which are now settled, in 2008 we filed Advance Pricing Agreement Requests with the tax authorities in the U.S., Canada and Germany. These requests have been under review with the respective tax authorities since 2008 and prior to 2016, it was uncertain whether an agreement would be reached between the tax authorities and whether we would agree to execute and finalize such agreements. During the first quarter of 2018, our German subsidiary executed and finalized the related Advance Pricing Agreement with the Competent Authority for Germany effective for tax years 2005 - 2017. In the first quarter of 2018, we recognized a net $1.4 million non-cash income tax benefit related to an APA tax settlement payment between our German and Canadian subsidiaries.

Tax authorities are examining certain of our U.S. and non-U.S. tax returns and may propose tax deficiencies, including penalties and interest. Because of the inherent uncertainties involved in settlement initiatives and court and tax proceedings, we cannot guarantee that these tax matters, if any, will be resolved in our favor, and therefore our potential exposure, if any, is also uncertain. 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.

On March 27, 2020, the “Coronavirus Aid, Relief and Economic Security (CARES) Act” was signed into law in response to the COVID-19 pandemic. The CARES Act, among other things, includes provisions relating to refundable payroll tax credits, deferment of employer side social security payments, modifications to the limitation of business interest for tax years beginning in 2019 and 2020 and technical corrections to tax depreciation methods for qualified improvement property. The modification to the business interest provisions increases the business interest limitation from 30% of adjusted taxable income to 50% of adjusted taxable income which increases our allowable interest expense deduction for 2019 and 2020. Consequently, in the first quarter of 2020 we recognized a cash tax benefit of $.5 million related to the reversal of the valuation allowance recognized in 2019 for the portion of the disallowed interest expense we did not expect to fully utilize at December 31, 2019 and we have considered such modifications in our 2020 provision for income taxes. We have determined other provisions of the CARES Act did not have a material impact on our provision for income taxes in 2020.

We accrue interest and penalties on our uncertain tax positions as a component of our provision for income taxes. The amount of interest and penalties we accrued during 2018, 2019 and 2020 was not material and at December 31, 2019 and 2020, we had no accrual for interest and penalties for our uncertain tax positions.

The following table shows the changes in the amount of our uncertain tax positions (exclusive of the effect of interest and penalties discussed above) during 2018, 2019 and 2020:

	Years ended December 31,
	2018			2019			2020
	(In millions)
Changes in unrecognized tax benefits:
Unrecognized tax benefits at beginning of year	$	2.1		$	4.1		$	3.9
Net increase (decrease):
Tax positions taken in prior periods		1.4			(.8	)		(.3	)
Tax positions taken in current period		.7			.7			.6
Lapse due to applicable statute of limitations		-			-			(.5	)
Change in currency exchange rates		(.1	)		(.1	)		.4
Unrecognized tax benefits at end of year	$	4.1		$	3.9		$	4.1

At December 31, 2020, all of our uncertain tax benefits are classified as a component of our noncurrent deferred tax asset. If our uncertain tax position at December 31, 2020 was recognized, a benefit of $4.1 million would affect our effective income tax rate. We currently estimate that our unrecognized tax benefits will decrease by approximately $.7 million during the next twelve months due to the expiration of certain statutes of limitations.

We and Contran file income tax returns in U.S. federal and various state and local jurisdictions. We also file income tax returns in various non-U.S. jurisdictions, principally in Germany, Canada, Belgium and Norway. Our U.S. income tax returns prior to 2017 are generally considered closed to examination by applicable tax authorities. Our non-U.S. income tax returns are generally considered closed to examination for years prior to 2016 for Germany, 2017 for Belgium, 2015 for Canada and 2011 for Norway.

- Definition

The entire disclosure for income taxes. Disclosures may include net deferred tax liability or asset recognized in an enterprise's statement of financial position, net change during the year in the total valuation allowance, approximate tax effect of each type of temporary difference and carryforward that gives rise to a significant portion of deferred tax liabilities and deferred tax assets, utilization of a tax carryback, and tax uncertainties information.

+ References + Details

Stockholders' equity

12 Months Ended

Dec. 31, 2020

Equity [Abstract]

Stockholders' equity

Note 13 – Stockholders’ equity:

Long-term incentive compensation plan – Prior to 2018, our board of directors adopted a plan that provides for the award of stock to our board of directors, up to a maximum of 200,000 shares. We awarded 5,600 shares in 2018, 9,000 shares in 2019 and 13,500 shares in 2020 under this plan. At December 31, 2020, 127,400 shares are available for awards.

Stock repurchase program – Prior to 2018, our board of directors 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. We did not make any purchases under the program in 2018. In 2019, we acquired 264,992 shares of our common stock in market transactions for an aggregate purchase price of $3.0 million and subsequently cancelled all of such shares. In 2020, we acquired 122,489 shares of common stock in market transactions for an aggregate purchase price of $1.0 million and subsequently cancelled all of such shares. At December 31, 2020, 1,563,519 shares are available for repurchase under this stock repurchase program.

Accumulated other comprehensive loss – Changes in accumulated other comprehensive loss for 2018, 2019 and 2020 are presented in the table below.

	Years ended December 31,
	2018			2019			2020
	(In millions)
Accumulated other comprehensive loss, net of tax:
Currency translation:
Balance at beginning of year	$	(211.9	)	$	(245.0	)	$	(246.8	)
Other comprehensive income (loss)		(33.1	)		(1.8	)		13.4
Balance at end of year	$	(245.0	)	$	(246.8	)	$	(233.4	)

Defined benefit pension plans:
Balance at beginning of year	$	(172.8	)	$	(180.0	)	$	(202.2	)
Other comprehensive income (loss):
Amortization of prior service cost and net losses included in net periodic pension cost		10.4			9.5			13.4
Net actuarial loss arising during year		(17.6	)		(31.7	)		(25.7	)
Balance at end of year	$	(180.0	)	$	(202.2	)	$	(214.5	)

OPEB plans:
Balance at beginning of year	$	1.2		$	.7		$	.2
Other comprehensive income (loss):
Amortization of prior service credit and net losses included in net periodic OPEB cost		(.3	)		(.3	)		(.2	)
Net actuarial loss arising during year		(.2	)		(.2	)		(.3	)
Balance at end of year	$	.7		$	.2		$	(.3	)

Marketable securities:
Balance at beginning of year	$	4.8		$	-		$	-
Change in accounting principle		(4.8	)		-			-
Balance at beginning of period, as adjusted		-			-			-
Other comprehensive income -
Unrealized gains arising during the year		-			-			-
Balance at end of year	$	-		$	-		$	-

Total accumulated other comprehensive loss:
Balance at beginning of year	$	(378.7	)	$	(424.3	)	$	(448.8	)
Change in accounting principle		(4.8	)		-			-
Balance at beginning of period, as adjusted		(383.5	)		(424.3	)		(448.8	)
Other comprehensive income (loss)		(40.8	)		(24.5	)		.6
Balance at end of year	$	(424.3	)	$	(448.8	)	$	(448.2	)

See Note 6 for further discussion on our marketable securities, Note 10 for amounts related to our defined benefit pension plans and Note 11 for our OPEB plans.

Related Party Transactions

12 Months Ended

Dec. 31, 2020

Related Party Transactions

Note 14 – Related party transactions:

We may be deemed to be controlled by Ms. Simmons and the Family Trust. See Note 1. Corporations that may be deemed to be controlled by or affiliated with such individuals sometimes engage in (a) intercorporate transactions such as guarantees, management and expense sharing arrangements, shared fee arrangements, joint ventures, partnerships, loans, options, advances of funds on open account, and sales, leases and exchanges of assets, including securities issued by both related and unrelated parties and (b) common investment and acquisition

strategies, business combinations, reorganizations, recapitalizations, securities repurchases, and purchases and sales (and other acquisitions and dispositions) of subsidiaries, divisions or other business units, which transactions have involved both related and unrelated parties and have included transactions which resulted in the acquisition by one related party of a publicly-held noncontrolling interest in another related party. While no transactions of the type described above are planned or proposed with respect to us other than as set forth in these financial statements, we continuously consider, review and evaluate, and understand that Contran and related entities consider, review and evaluate such transactions. Depending upon the business, tax and other objectives then relevant, it is possible that we might be a party to one or more such transactions in the future.

Receivables from and payables to affiliates are summarized in the table below.

	December 31,
	2019		2020
	(In millions)
Current receivables from affiliates:
LPC	$	4.7	$	-
Other		2.2		3.5
	$	6.9	$	3.5

Current payables to affiliates:
LPC	$	16.4	$	19.3
Income taxes payable to Valhi		4.9		8.6
	$	21.3	$	27.9

Noncurrent payable to affiliate -
Income taxes payable to Valhi (See Note 12)	$	56.6	$	50.6

Amounts payable to LPC are generally for the purchase of TiO₂, while amounts receivable from LPC are generally from the sale of TiO₂ feedstock. See Note 5. Purchases of TiO₂ from LPC were $165.9 million in 2018, $176.2 million in 2019 and $167.8 million in 2020. Sales of feedstock to LPC were $66.9 million in 2018, $84.1 million in 2019 and $84.2 million in 2020.

From time to time, we may have loans and advances outstanding between us and various related parties pursuant to term and demand notes. We generally enter into these loans and advances for cash management purposes. When we loan funds to related parties, we are generally able to earn a higher rate of return on the loan than we would earn if we invested the funds in other instruments, and when we borrow from related parties, we are generally able to pay a lower rate of interest than we would pay if we had incurred third-party indebtedness. While certain of these loans to affiliates may be of a lesser credit quality than cash equivalent instruments otherwise available to us, we believe we have considered the credit risks in the terms of the applicable loans.

In this regard, prior to 2018 we entered into an unsecured revolving demand promissory note with Valhi whereby, as amended, we agreed to loan Valhi up to $60 million. At December 31, 2020, we amended the promissory note and reduced the loan amount to $40 million. Our loan to Valhi bears interest at prime plus 1.00%, payable quarterly, with all principal due on demand, but in any event no earlier than December 31, 2022. Loans made to Valhi at any time are at our discretion. At December 31, 2019 and December 31, 2020, we had no outstanding loans to Valhi under this promissory note.

Interest income (including unused commitment fees) on our loan to Valhi was $.3 million in 2018, $.5 million in 2019 and $.3 million in 2020.

Under the terms of various intercorporate services agreements (ISAs) entered into between us and various related parties, including Contran, employees of one company will provide certain management, tax planning, financial and administrative services to the other company on a fee basis. Such charges are based upon estimates of the time devoted by the employees of the provider of the services to the affairs of the recipient, and the compensation and associated expenses of such persons. Because of the number of companies affiliated with Contran, we believe we benefit from cost savings and economies of scale gained by not having certain management, financial and administrative staffs duplicated at each entity, thus allowing certain individuals to provide services to multiple companies but only be compensated by one entity. We negotiate fees annually and agreements renew quarterly. The net ISA fee charged to us by Contran is included in selling, general and administrative expense and corporate expense and was $21.1 million in 2018, $22.8 million in 2019 and $23.3 million in 2020.

Contran and certain of its subsidiaries and affiliates, including us, purchase certain of their insurance policies as a group, with the costs of the jointly-owned policies being apportioned among the participating companies. Tall Pines Insurance Company, a subsidiary of Valhi, underwrites certain insurance policies for Contran and certain of its subsidiaries and affiliates, including us. Tall Pines purchases reinsurance from third-party insurance carriers with an A.M. Best Company rating of generally at least A-(excellent) for substantially all of the risks it underwrites. EWI RE, Inc., a subsidiary of Valhi, brokered certain of our insurance policies, provided claims and risk management services and, where appropriate, engaged certain third-party risk management consultants prior to NL’s sale of EWI’s insurance and risk management business to a third party in November 2019. Consistent with insurance industry practices, Tall Pines receives commissions from reinsurance underwriters and/or assesses fees for certain of the policies that it underwrites, and prior to November 2019 EWI received commissions from insurance and reinsurance underwriters for the policies that it brokered. The aggregate amounts we paid under the group insurance program were $10.4 million in 2018 and $12.5 million through the date of the sale in 2019. These amounts principally represent insurance premiums paid to Tall Pines or EWI, including amounts paid to EWI that EWI then remitted, net of brokerage commissions, to insurers. Following the sale of EWI’s insurance and risk management business, Contran engaged the third-party insurance broker that purchased the business to provide many of the services previously provided by EWI, and we continue to utilize Tall Pines to underwrite certain insurance risks. During 2020, we and our joint venture paid $19.1 million under the group insurance program, which amount principally represents insurance premiums, including $14.8 million for policies written by Tall Pines. Amounts paid under the group insurance program also include payments to insurers or reinsurers (which prior to the sale were made through EWI) for the reimbursement of claims within our applicable deductible or retention ranges that such insurers and reinsurers paid to third parties on our behalf, as well as amounts for claims and risk management services and various other third-party fees and expenses incurred by the program. We expect these relationships will continue in 2021.

With respect to certain of such jointly-owned policies, it is possible that unusually large losses incurred by one or more insureds during a given policy period could leave the other participating companies without adequate coverage under that policy for the balance of the policy period. As a result, and in the event that the available coverage under a particular policy would become exhausted by one or more claims, Contran and certain of its subsidiaries and affiliates, including us, have entered into a loss sharing agreement under which any uninsured loss arising because the available coverage had been exhausted by one or more claims will be shared ratably by those entities that had submitted claims under the relevant policy. We believe the benefits, in the form of reduced premiums and broader coverage associated with the group coverage for such policies, justifies the risk associated with the potential for any uninsured loss.

Contran and certain of its subsidiaries, including us, participate in a combined information technology data recovery program that Contran provides from a data recovery center that it established. Pursuant to the program, Contran and certain of its subsidiaries, including us, as a group share information technology data recovery services. The program apportions its costs among the participating companies. We paid Contran $.1 million in 2018, $.2 million in 2019 and $.3 million in 2020 for such services. Under the terms of a sublease agreement between Contran and us, we lease certain office space from Contran. We paid Contran $.1 million in 2019 and $.4 million in 2020 for such rent and related ancillary services. We expect that these relationships with Contran will continue in 2021.

Commitments and Contingencies

12 Months Ended

Dec. 31, 2020

Commitments And Contingencies Disclosure [Abstract]

Commitments and Contingencies

Note 15 – Commitments and contingencies:

Environmental matters – Our operations are governed by various environmental laws and regulations. Certain of our operations are and have been engaged in the handling, manufacture or use of substances or compounds that may be considered toxic or hazardous within the meaning of applicable environmental laws and regulations. As with other companies engaged in similar businesses, certain of our past and current operations and products have the potential to cause environmental or other damage. We have implemented and continue to implement various policies and programs in an effort to minimize these risks. Our policy is to maintain compliance with applicable environmental laws and regulations at all of our facilities and to strive to improve our environmental performance and overall sustainability. We update our Kronos Sustainability Report biennially, which highlights our focus on sustainability of our manufacturing operations, as well as our environmental, social and governance strategy. From time to time, we may be subject to environmental regulatory enforcement under U.S. and non-U.S. statutes, the resolution of which typically involves the establishment of compliance programs. It is possible that future developments, such as stricter requirements of environmental laws and enforcement policies thereunder, could adversely affect our production, handling, use, storage, transportation, sale or disposal of such substances. We believe all of our manufacturing facilities are in substantial compliance with applicable environmental laws.

Litigation matters – 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.

Concentrations of credit risk – Sales of TiO₂ accounted for 94% of our net sales in 2018 and 2019 and 93% in 2020. The remaining sales result from the mining and sale of ilmenite ore (a raw material used in the sulfate pigment production process), and the manufacture and sale of iron-based water treatment chemicals and certain titanium chemical products (derived from co-products of the TiO₂ production processes). TiO₂ is generally sold to the paint, plastics and paper industries. Such markets are generally considered “quality-of-life” markets whose demand for TiO₂ is influenced by the relative economic well-being of the various geographic regions. We sell TiO₂ to approximately 4,000 customers, with the top ten customers approximating 33% of net sales in 2018, 36% in 2019 and 34% in 2020. We did not have sales to a single customer comprising 10% or more of our net sales in 2018. One customer accounted for approximately 10% of our net sales in 2019 and 2020.

The table below shows the approximate percentage of our TiO₂ sales by volume for our significant markets, Europe and North America, for the last three years.

	2018		2019		2020
Europe	44	%	46	%	46	%
North America	37	%	34	%	36	%

Long-term contracts – We have long-term supply contracts that provide for certain of our TiO₂ feedstock requirements through 2023. The agreements require us to purchase certain minimum quantities of feedstock with minimum purchase commitments aggregating approximately $1.2 billion over the life of the contracts in years subsequent to December 31, 2020. In addition, we have other long-term supply and service contracts that provide for various raw materials and services. These agreements require us to purchase certain minimum quantities or services with minimum purchase commitments aggregating approximately $86 million at December 31, 2020.

Income taxes – We are a party to a tax sharing agreement with Contran and Valhi providing for the allocation of tax liabilities and tax payments as described in Note 1. Under applicable law, we, along with every other member of the Contran Tax Group, are each jointly and severally liable for the aggregate federal income tax liability of Contran and the other companies included in the Contran Tax Group for all periods in which we are

included in the Contran Tax Group. Valhi has agreed, however, to indemnify us for any liability for income taxes of the Contran Tax Group in excess of our tax liability computed in accordance with the tax sharing agreement.

Financial Instruments

12 Months Ended

Dec. 31, 2020

Fair Value Disclosures [Abstract]

Financial Instruments

Note 16 – Financial instruments:

See Note 6 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 as of December 31, 2019 and 2020.

		December 31, 2019				December 31, 2020
		Carrying amount		Fair value		Carrying amount		Fair value
	(In millions)
Cash, cash equivalents and restricted cash		$	392.3	$	392.3	$	362.0	$	362.0
Long-term debt - Fixed rate Senior Notes			442.6		457.0		485.7		499.9

At December 31, 2020, the estimated market price of our Senior Notes was €1,019 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 3 and 9.

Recent Accounting Pronouncements

12 Months Ended

Dec. 31, 2020

New Accounting Pronouncements And Changes In Accounting Principles [Abstract]

Recent Accounting Pronouncements

Note 17 – Recent accounting pronouncement:

In December 2019, the Financial Accounting Standards Board issued ASU 2019-12, Simplifying the Accounting for Income Taxes, which changes the accounting for certain income tax transactions and reduces complexity in accounting for income taxes in certain areas. The ASU introduces new guidance including providing a policy election for an entity to not allocate consolidated current and deferred tax expense when a member of a consolidated tax return is not subject to income tax in its separate financial statements and is a disregarded entity by the taxing authority; and providing guidance to evaluate whether a step-up in tax basis of goodwill relates to a business combination in which book goodwill was recognized or a separate transaction. The ASU also changes existing guidance in a number of areas, including: the method of making an intraperiod allocation of total income tax expense if there is a loss in continuing operations and gains outside of continuing operations; determining when a deferred tax liability is recognized after an investor in a non-U.S. entity transitions to or from the equity method of accounting; accounting for tax law changes and year-to-date losses in interim periods; and determining how to apply the income tax guidance to franchise taxes that are partially based on income. We adopted this ASU as of January 1, 2020. The adoption of this ASU did not have a material effect on our Consolidated Financial Statements.

- Definition

The entire disclosure for change in accounting principle. Includes, but is not limited to, nature, reason, and method of adopting amendment to accounting standards or other change in accounting principle.

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+ Details

Quarterly Results of Operations

12 Months Ended

Dec. 31, 2020

Selected Quarterly Financial Information [Abstract]

Quarterly Results of Operations

Note 18 – Quarterly results of operations (unaudited):

	Quarter ended
	March 31		June 30		September 30		December 31
	(In millions, except per share data)
Year ended December 31, 2019
Net sales	$	436.5	$	484.5	$	437.4	$	372.7
Gross margin		109.3		109.5		87.7		79.7
Net income		30.3		29.5		17.9		9.4
Basic and diluted income per share	$	.26	$	.25	$	.16	$	.08

Year ended December 31, 2020
Net sales	$	421.0	$	386.0	$	416.9	$	414.9
Gross margin		88.1		95.8		80.6		86.7
Net income		27.0		18.6		8.1		10.2
Basic and diluted income per share	$	.23	$	.16	$	.07	$	.09

We recognized the following amounts during 2019:

•

non-cash deferred income tax expense of $5.5 million in the fourth quarter primarily related to the revaluation of our net deferred income tax asset in Germany resulting from a decrease in the German trade tax rate (see Note 12),

•

income tax benefit of $3.0 million in the fourth quarter related to the favorable settlement of a prior year tax matter in Germany (see Note 12), and

•

pre-tax insurance settlement gain of $2.6 million in the fourth quarter related to a property damage claim.

In the first quarter of 2020, we recognized a pre-tax insurance settlement gain of $1.5 million related to a property damage claim.

The sum of the quarterly per share amounts may not equal the annual per share amounts due to relative changes in the weighted average number of shares used in the per share computations.

Summary of Significant Accounting Policies (Policies)

12 Months Ended

Dec. 31, 2020

Accounting Policies [Abstract]

Organization and Basis of Presentation

Unless otherwise indicated, references in this report to “we,” “us” or “our” refer to Kronos Worldwide, Inc. and its subsidiaries, taken as a whole.

Management's Estimates

Principles of Consolidation

Translation of Currencies

Cash and Cash Equivalents

Cash and cash equivalents – We classify bank time deposits and highly-liquid investments with original maturities of three months or less as cash equivalents.

Restricted Cash

Marketable Securities and Securities Transactions

•

Level 1 – Unadjusted quoted prices in active markets that are accessible at the measurement date for identical, unrestricted assets or liabilities;

•

Level 2 – Quoted prices in markets that are not active, or inputs which are observable, either directly or indirectly, for substantially the full term of the assets or liability; and

•

Level 3 – Prices or valuation techniques that require inputs that are both significant to the fair value measurement and unobservable.

See Notes 6 and 10.

Accounts Receivable

Inventories and Cost of Sales

Investment in TiO2 Manufacturing Joint Venture

Leases

Property and Equipment and Depreciation

Asset		Useful lives
Buildings and improvements		10 to 40 years
Machinery and equipment		3 to 20 years
Mine development costs		units-of-production

We expense costs incurred for maintenance, repairs and minor renewals (including planned major maintenance) while we capitalize expenditures for major improvements.

Long-term Debt

Employee Benefit Plans

Income Taxes

Income Tax Uncertainties

Net Sales

Selling, General and Administrative Expense

Shipping and Handling Costs

We include shipping and handling costs in selling, general and administrative expense and these costs were $105 million in 2018, $111 million in 2019 and $112 million in 2020.

Research and Development

We expense research and development costs as incurred, and these costs were $16 million in 2018, $17 million in 2019 and $16 million in 2020.

Advertising Costs

We expense advertising costs as incurred and these costs were not material in any year presented.

Concentrations of credit risk

The table below shows the approximate percentage of our TiO₂ sales by volume for our significant markets, Europe and North America, for the last three years.

	2018		2019		2020
Europe	44	%	46	%	46	%
North America	37	%	34	%	36	%

Recent Accounting Pronouncements

Summary of Significant Accounting Policies (Tables)

12 Months Ended

Dec. 31, 2020

Accounting Policies [Abstract]

Estimated Useful Life of Assets

Asset		Useful lives
Buildings and improvements		10 to 40 years
Machinery and equipment		3 to 20 years
Mine development costs		units-of-production

Geographic Information (Tables)

12 Months Ended

Dec. 31, 2020

Segments Geographical Areas [Abstract]

Net Sales and Property and Equipment by Geographical Information

	Years ended December 31,
	2018			2019			2020
	(In millions)
Net sales - point of origin:
United States	$	839.4		$	998.5		$	978.8
Germany		886.1			883.6			836.0
Canada		307.2			328.7			319.5
Belgium		272.2			270.7			249.5
Norway		209.6			192.2			211.8
Eliminations		(852.6	)		(942.6	)		(956.8	)
Total	$	1,661.9		$	1,731.1		$	1,638.8

Net sales - point of destination:
Europe	$	817.2		$	823.5		$	783.2
North America		542.0			575.6			569.3
Other		302.7			332.0			286.3
Total	$	1,661.9		$	1,731.1		$	1,638.8

	December 31,
	2019		2020
	(In millions)
Identifiable assets - net property and equipment:
Germany	$	221.9	$	228.2
Belgium		95.3		107.3
Norway		86.3		86.7
Canada		72.3		87.9
Other		14.8		14.5
Total	$	490.6	$	524.6

Accounts and Other Receivables, Net (Tables)

12 Months Ended

Dec. 31, 2020

Receivables [Abstract]

Accounts and Other Receivables, Net

	December 31,
	2019			2020
	(In millions)
Trade receivables	$	270.5		$	294.8
Recoverable VAT and other receivables		25.4			21.3
Refundable income taxes		7.7			5.3
Allowance for doubtful accounts		(1.1	)		(1.9	)
Total	$	302.5		$	319.5

Inventories, Net (Tables)

12 Months Ended

Dec. 31, 2020

Inventory Disclosure [Abstract]

Schedule of Inventories, Net

	December 31,
	2019		2020
	(In millions)
Raw materials	$	124.4	$	133.2
Work in process		39.0		36.8
Finished products		269.9		269.2
Supplies		69.7		79.8
Total	$	503.0	$	519.0

Investment in TiO2 Manufacturing Joint Venture (Tables)

12 Months Ended

Dec. 31, 2020

Louisiana Pigment Company, L.P.

Schedule of Equity Method Investments [Line Items]

Summary of Net Cash Distributions, Balance Sheets and Income Statements

	Years ended December 31,
	2018			2019			2020
	(In millions)
Distributions from LPC	$	34.3		$	40.6		$	32.7
Contributions to LPC		(30.3	)		(49.9	)		(45.5	)
Net distributions (contributions)	$	4.0		$	(9.3	)	$	(12.8	)

Summary balance sheets of LPC are shown below:

	December 31,
	2019		2020
	(In millions)
ASSETS
Current assets	$	94.6	$	105.8
Property and equipment, net		121.3		134.1
Total assets	$	215.9	$	239.9

LIABILITIES AND PARTNERS' EQUITY
Other liabilities, primarily current	$	32.8	$	30.6
Partners' equity		183.1		209.3
Total liabilities and partners' equity	$	215.9	$	239.9

Summary income statements of LPC are shown below:

	Years ended December 31,
	2018		2019		2020
	(In millions)
Revenues and other income:
Kronos	$	165.9	$	176.2	$	167.8
Venator Investments		167.0		177.0		168.3
Total revenues and other income		332.9		353.2		336.1

Cost and expenses:
Cost of sales		332.5		352.8		335.7
General and administrative		.4		.4		.4
Total costs and expenses		332.9		353.2		336.1
Net income	$	-	$	-	$	-

Marketable Securities (Tables)

12 Months Ended

Dec. 31, 2020

Investments Debt And Equity Securities [Abstract]

Classification of Marketable Securities

Marketable security	Fair value measurement level	Market value		Cost basis		Unrealized loss
		(In millions)
December 31, 2019:
Valhi common stock	1	$	3.2	$	3.2	$	-
NL and CompX common stocks	1		.1		.1		-
Total		$	3.3	$	3.3	$	-

December 31, 2020:
Valhi common stock	1	$	2.1	$	3.2	$	(1.1	)
NL and CompX common stocks	1		.1		.1		-
Total		$	2.2	$	3.3	$	(1.1	)

Leases (Tables)

12 Months Ended

Dec. 31, 2020

Leases [Abstract]

Schedule of Future Minimum Payment under Non-Cancellable Operating Lease Liabilities

At December 31, 2020, maturities of our operating lease liabilities were as follows:

Years ending December 31,	Amount
	(In millions)
2021	$	7.4
2022		4.1
2023		2.7
2024		1.8
2025		1.3
2026 and thereafter		20.1
Total remaining lease payments		37.4
Less imputed interest		11.9
Total lease obligations		25.5
Less current obligations		6.7
Long term lease obligations	$	18.8

Long-Term Debt (Tables)

12 Months Ended

Dec. 31, 2020

Debt Disclosure [Abstract]

Components of Long Term Debt

	December 31,
	2019		2020
	(In millions)
Kronos International, Inc. 3.75% Senior Notes	$	442.6	$	485.7
Other		2.9		1.7
Total debt		445.5		487.4
Less current maturities		1.5		.7
Total long-term debt	$	444.0	$	486.7

Aggregate Maturities of Long-Term Debt and Other

Aggregate maturities and other – Aggregate maturities of debt at December 31, 2020 are presented in the table below.

Years ending December 31,	Amount
	(In millions)
2021	$	.7
2022		.7
2023		.3
2024		-
2025		490.4
2026 and thereafter		-
Gross maturities		492.1
Less debt issuance costs		4.7
Total	$	487.4

- Definition

Tabular disclosure of long-debt instruments or arrangements, including identification, terms, features, collateral requirements and other information necessary to a fair presentation. These are debt arrangements that originally required repayment more than twelve months after issuance or greater than the normal operating cycle of the entity, if longer.

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-Topic 505
-SubTopic 10
-Section 50
-Paragraph 8
-URI http://asc.fasb.org/extlink&oid=109259400&loc=d3e21538-112644

Reference 8: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
-SubTopic 470
-Section 50
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Reference 9: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 835
-SubTopic 30
-Section 55
-Paragraph 8
-URI http://asc.fasb.org/extlink&oid=114775985&loc=d3e28878-108400

Reference 10: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 505
-SubTopic 10
-Section 50
-Paragraph 3
-URI http://asc.fasb.org/extlink&oid=109259400&loc=d3e21475-112644

+ Details

Accounts Payable and Accrued Liabilities (Tables)

12 Months Ended

Dec. 31, 2020

Payables And Accruals [Abstract]

Components of Accounts Payable and Accrued Liabilities

	December 31,
	2019		2020
	(In millions)
Accounts payable	$	137.2	$	111.0
Accrued sales discounts and rebates		32.4		29.1
Employee benefits		21.1		27.8
Operating lease liabilities		6.2		6.7
Other		40.8		41.3
Total	$	237.7	$	215.9

Defined Contribution and Defined Benefit Retirement Plans (Tables)

12 Months Ended

Dec. 31, 2020

Funded Status of Defined Benefit Plan

The funded status of our non-U.S. defined benefit pension plans is presented in the table below.

	December 31,
	2019			2020
	(In millions)
Change in projected benefit obligations (PBO):
Benefit obligations at beginning of the year	$	658.7		$	738.2
Service cost		12.8			13.3
Interest cost		13.3			10.0
Participant contributions		1.6			1.8
Actuarial losses		81.5			46.6
Settlements		(1.0	)		-
Change in currency exchange rates		(7.2	)		58.6
Benefits paid		(21.5	)		(21.8	)
Benefit obligations at end of the year		738.2			846.7

Change in plan assets:
Fair value of plan assets at beginning of the year		400.3			437.5
Actual return on plan assets		45.1			18.7
Employer contributions		15.3			16.0
Participant contributions		1.6			1.8
Settlements		(1.0	)		-
Change in currency exchange rates		(2.3	)		29.6
Benefits paid		(21.5	)		(21.8	)
Fair value of plan assets at end of year		437.5			481.8
Funded status	$	(300.7	)	$	(364.9	)

Amounts recognized in the balance sheet:
Noncurrent pension asset	$	3.1		$	4.5
Noncurrent accrued pension costs		(303.8	)		(369.4	)
Total	$	(300.7	)	$	(364.9	)

Amounts recognized in accumulated other comprehensive loss:
Actuarial losses	$	285.3		$	304.5
Prior service cost		1.0			.8
Total	$	286.3		$	305.3

Accumulated benefit obligations (ABO)	$	712.2		$	819.7

The funded status of our U.S. defined benefit pension plan is presented in the table below.

	December 31,
	2019			2020
	(In millions)
Change in PBO:
Benefit obligations at beginning of the year	$	16.9		$	18.3
Interest cost		.7			.6
Actuarial losses		1.8			1.6
Benefits paid		(1.1	)		(1.1	)
Benefit obligations at end of the year		18.3			19.4

Change in plan assets:
Fair value of plan assets at beginning of the year		13.1			14.6
Actual return on plan assets		1.7			2.0
Employer contributions		.9			.6
Benefits paid		(1.1	)		(1.1	)
Fair value of plan assets at end of year		14.6			16.1
Funded status	$	(3.7	)	$	(3.3	)

Amounts recognized in the balance sheet:
Accrued pension costs:
Current	$	(.1	)	$	(.1	)
Noncurrent		(3.6	)		(3.2	)
Total	$	(3.7	)	$	(3.3	)

Amounts recognized in accumulated other comprehensive loss - actuarial losses	$	11.3		$	10.9

ABO	$	18.3		$	19.4

Components of Net Periodic Benefit Cost (Credit)

	Years ended December 31,
	2018			2019			2020
	(In millions)
Net periodic pension cost (income):
Service cost benefits	$	11.6		$	12.8		$	13.3
Interest cost on PBO		13.5			13.3			10.0
Expected return on plan assets		(12.0	)		(11.7	)		(8.7	)
Recognized actuarial losses		13.1			12.8			17.3
Amortization of prior service cost		.2			.2			.2
Total	$	26.4		$	27.4		$	32.1

	Years ended December 31,
	2018			2019			2020
	(In millions)
Net periodic pension cost (income):
Interest cost on PBO	$	.6		$	.7		$	.6
Expected return on plan assets		(1.0	)		(.7	)		(.6	)
Recognized actuarial losses		.6			.6			.6
Total	$	.2		$	.6		$	.6

Schedule of Defined Benefit Pension Plans Balances (for which Accumulated Benefit Obligation Exceeds Fair Value of Plan Assets)

Information concerning certain of our non-U.S. defined benefit pension plans (for which the ABO exceeds the fair value of plan assets as of the indicated date) is presented in the table below.

	December 31,
	2019		2020
	(In millions)
Plans for which the ABO exceeds plan assets:
PBO	$	685.4	$	790.9
ABO		663.3		768.1
Fair value of plan assets		381.7		421.5

Key Actuarial Assumptions Used

	December 31,
Rate	2019			2020
Discount rate		1.4	%		1.0	%
Increase in future compensation levels		2.6	%		2.6	%

The weighted-average rate assumptions used in determining the net periodic pension cost for our non-U.S. defined benefit pension plans for 2018, 2019 and 2020 are presented in the table below.

	Years ended December 31,
Rate	2018			2019			2020
Discount rate		2.1	%		2.1	%		1.4	%
Increase in future compensation levels		2.6	%		2.6	%		2.6	%
Long-term return on plan assets		2.9	%		2.9	%		2.0	%

	Years ended December 31,
Rate	2018			2019			2020
Discount rate		3.5	%		4.1	%		3.1	%
Long-term return on plan assets		7.5	%		5.5	%		4.5	%

Defined Benefit Pension Plans

Benefit Payments

Years ending December 31,	Amount
	(In millions)
2021	$	23.5
2022		24.9
2023		24.7
2024		26.7
2025		26.8
Next 5 years		159.5

Changes in Benefit Obligations Recognized in Accumulated Other Comprehensive Income (Loss)

The table below details the changes in our consolidated other comprehensive income (loss) during 2018, 2019 and 2020.

	Years ended December 31,
	2018			2019			2020
	(In millions)
Changes in plan assets and benefit obligations recognized in other comprehensive income (loss):
Current year:
Net actuarial losses	$	(24.3	)	$	(48.5	)	$	(36.8	)
Amortization of unrecognized:
Net actuarial losses		13.7			13.4			17.9
Prior service cost		.2			.2			.2
Total	$	(10.4	)	$	(34.9	)	$	(18.7	)

Composition of Pension Plan Assets

The composition of our pension plan assets by asset category and fair value level at December 31, 2019 and 2020 is shown in the tables below.

	Fair Value Measurements at December 31, 2019
	Total		Quoted prices in active markets (Level 1)		Significant other observable inputs (Level 2)		Significant unobservable inputs (Level 3)		Assets measured at NAV
	(In millions)
Germany	$	264.5	$	-	$	-	$	264.5	$	-
Canada:
Local currency equities		8.3		8.3		-		-		-
Non local currency equities		16.3		16.3		-		-		-
Local currency fixed income		80.9		80.9		-		-		-
Cash and other		.6		.6		-		-		-
Norway:
Local currency equities		1.6		1.6		-		-		-
Non local currency equities		4.2		4.2		-		-		-
Local currency fixed income		22.8		14.1		8.7		-		-
Non local currency fixed income		8.3		8.3		-		-		-
Real estate		6.6		-		-		6.6		-
Cash and other		8.2		7.4		-		.8		-
U.S.:
Equities		5.8		1.6		-		.2		4.0
Fixed income		7.0		7.0		-		-		-
Cash and other		1.8		1.4		-		-		.4
Other		15.2		4.2		-		11.0		-
Total	$	452.1	$	155.9	$	8.7	$	283.1	$	4.4

	Fair Value Measurements at December 31, 2020
	Total		Quoted prices in active markets (Level 1)		Significant other observable inputs (Level 2)		Significant unobservable inputs (Level 3)		Assets measured at NAV
	(In millions)
Germany	$	292.5	$	-	$	-	$	292.5	$	-
Canada:
Local currency equities		.2		.2		-		-		-
Non local currency equities		26.6		26.6		-		-		-
Local currency fixed income		87.3		87.3		-		-		-
Cash and other		.9		.9		-		-		-
Norway:
Local currency equities		3.2		3.2		-		-		-
Non local currency equities		6.3		6.3		-		-		-
Local currency fixed income		26.4		16.3		10.1		-		-
Non local currency fixed income		7.7		7.7		-		-		-
Real estate		7.1		-		-		7.1		-
Cash and other		5.5		4.8		-		.7		-
U.S.:
Equities		6.3		.9		-		.2		5.2
Fixed income		8.1		8.1		-		-		-
Cash and other		1.7		1.3		-		-		.4
Other		18.1		4.3		-		13.8		-
Total	$	497.9	$	167.9	$	10.1	$	314.3	$	5.6

Roll forward of Change in Fair Value of Level 3 Assets

A rollforward of the change in fair value of Level 3 assets follows.

	December 31,
	2019			2020
	(In millions)
Fair value at beginning of year	$	258.0		$	283.1
Gain on assets held at end of year		30.2			4.2
Gain on assets sold during the year		.1			-
Assets purchased		16.0			14.4
Assets sold		(14.9	)		(14.1	)
Currency exchange rate fluctuations		(6.3	)		26.7
Fair value at end of year	$	283.1		$	314.3

Other Noncurrent Liabilities (Tables)

12 Months Ended

Dec. 31, 2020

Other Liabilities Disclosure [Abstract]

Components of Other Noncurrent Liabilities

	December 31,
	2019		2020
	(In millions)
Accrued postretirement benefits	$	8.0	$	8.7
Employee benefits		6.0		6.2
Other		14.2		11.8
Total	$	28.2	$	26.7

Income Taxes (Tables)

12 Months Ended

Dec. 31, 2020

Income Tax Disclosure [Abstract]

Components of Income Taxes and Comprehensive Provision for Income Taxes Allocation

	Years ended December 31,
	2018			2019			2020
	(In millions)
Pre-tax income:
U.S.	$	32.8		$	37.9		$	20.9
Non-U.S.		261.0			83.2			59.1
Total	$	293.8		$	121.1		$	80.0

Expected tax expense, at U.S. federal statutory income tax rate of 21%	$	61.7		$	25.4		$	16.8
Non-U.S. tax rates		21.0			5.4			.7
Incremental net tax expense (benefit) on earnings and losses of U.S. and non-U.S. companies		1.3			(4.3	)		(5.5	)
Valuation allowance		-			.7			.8
Transition Tax		(1.7	)		-			-
Global intangible low-tax income, net		3.7			2.4			2.7
Tax rate changes		(.2	)		5.5			(.3	)
Canada - Germany APA		(1.4	)		-			-
Refund of prior tax payments, net		-			(2.1	)		(.1	)
Adjustment to the reserve for uncertain tax positions, net		2.1			.7			.1
Nondeductible expenses		1.6			1.4			.9
U.S. state income taxes and other, net		.7			(1.1	)		-
Income tax expense	$	88.8		$	34.0		$	16.1

Components of income tax expense:
Current payable:
U.S. federal and state	$	12.0		$	5.5		$	4.8
Non-U.S.		51.1			21.9			14.9
		63.1			27.4			19.7

Noncurrent payable - U.S. federal		(1.6	)		-			-

Deferred income taxes (benefit):
U.S. federal and state		(1.8	)		.8			(2.6	)
Non-U.S.		29.1			5.8			(1.0	)
		27.3			6.6			(3.6	)
Income tax expense	$	88.8		$	34.0		$	16.1

Comprehensive provision for income taxes allocable to:
Net income	$	88.8		$	34.0		$	16.1
Other comprehensive income (loss):
Pension plans		(3.6	)		(13.7	)		(6.0	)
OPEB plans		(.2	)		(.2	)		(.2	)
Total	$	85.0		$	20.1		$	9.9

Components of Net Deferred Income Taxes

The components of our net deferred income taxes at December 31, 2019 and 2020 are summarized in the following table.

	December 31,
	2019						2020
	Assets			Liabilities			Assets			Liabilities
	(In millions)
Tax effect of temporary differences related to:
Inventories	$	3.5		$	-		$	1.7		$	-
Property and equipment		-			(51.6	)		-			(58.4	)
Lease assets (liabilities)		5.9			(6.1	)		6.4			(6.5	)
Accrued OPEB costs		2.2			-			2.4			-
Accrued pension costs		79.8			-			100.0			-
Other accrued liabilities and deductible differences		9.3			-			11.7			-
Other taxable differences		-			(1.7	)		-			(1.4	)
Tax on unremitted earnings of non-U.S. subsidiaries		-			(10.8	)		-			(12.0	)
Tax loss and tax credit carryforwards		80.0			-			86.9			-
Valuation allowance		(3.5	)		-			(4.4	)		-
Adjusted gross deferred tax assets (liabilities)		177.2			(70.2	)		204.7			(78.3	)
Netting by tax jurisdiction		(49.5	)		49.5			(53.7	)		53.7
Net noncurrent deferred tax asset (liability)	$	127.7		$	(20.7	)	$	151.0		$	(24.6	)

Changes in Amount of Uncertain Tax Positions

The following table shows the changes in the amount of our uncertain tax positions (exclusive of the effect of interest and penalties discussed above) during 2018, 2019 and 2020:

	Years ended December 31,
	2018			2019			2020
	(In millions)
Changes in unrecognized tax benefits:
Unrecognized tax benefits at beginning of year	$	2.1		$	4.1		$	3.9
Net increase (decrease):
Tax positions taken in prior periods		1.4			(.8	)		(.3	)
Tax positions taken in current period		.7			.7			.6
Lapse due to applicable statute of limitations		-			-			(.5	)
Change in currency exchange rates		(.1	)		(.1	)		.4
Unrecognized tax benefits at end of year	$	4.1		$	3.9		$	4.1

Stockholders' equity (Tables)

12 Months Ended

Dec. 31, 2020

Equity [Abstract]

Schedule of Changes in Accumulated Other Comprehensive Loss

Accumulated other comprehensive loss – Changes in accumulated other comprehensive loss for 2018, 2019 and 2020 are presented in the table below.

	Years ended December 31,
	2018			2019			2020
	(In millions)
Accumulated other comprehensive loss, net of tax:
Currency translation:
Balance at beginning of year	$	(211.9	)	$	(245.0	)	$	(246.8	)
Other comprehensive income (loss)		(33.1	)		(1.8	)		13.4
Balance at end of year	$	(245.0	)	$	(246.8	)	$	(233.4	)

Defined benefit pension plans:
Balance at beginning of year	$	(172.8	)	$	(180.0	)	$	(202.2	)
Other comprehensive income (loss):
Amortization of prior service cost and net losses included in net periodic pension cost		10.4			9.5			13.4
Net actuarial loss arising during year		(17.6	)		(31.7	)		(25.7	)
Balance at end of year	$	(180.0	)	$	(202.2	)	$	(214.5	)

OPEB plans:
Balance at beginning of year	$	1.2		$	.7		$	.2
Other comprehensive income (loss):
Amortization of prior service credit and net losses included in net periodic OPEB cost		(.3	)		(.3	)		(.2	)
Net actuarial loss arising during year		(.2	)		(.2	)		(.3	)
Balance at end of year	$	.7		$	.2		$	(.3	)

Marketable securities:
Balance at beginning of year	$	4.8		$	-		$	-
Change in accounting principle		(4.8	)		-			-
Balance at beginning of period, as adjusted		-			-			-
Other comprehensive income -
Unrealized gains arising during the year		-			-			-
Balance at end of year	$	-		$	-		$	-

Total accumulated other comprehensive loss:
Balance at beginning of year	$	(378.7	)	$	(424.3	)	$	(448.8	)
Change in accounting principle		(4.8	)		-			-
Balance at beginning of period, as adjusted		(383.5	)		(424.3	)		(448.8	)
Other comprehensive income (loss)		(40.8	)		(24.5	)		.6
Balance at end of year	$	(424.3	)	$	(448.8	)	$	(448.2	)

Related Party Transactions (Tables)

12 Months Ended

Dec. 31, 2020

Summary of Receivables from and Payables to Affiliates

Receivables from and payables to affiliates are summarized in the table below.

	December 31,
	2019		2020
	(In millions)
Current receivables from affiliates:
LPC	$	4.7	$	-
Other		2.2		3.5
	$	6.9	$	3.5

Current payables to affiliates:
LPC	$	16.4	$	19.3
Income taxes payable to Valhi		4.9		8.6
	$	21.3	$	27.9

Noncurrent payable to affiliate -
Income taxes payable to Valhi (See Note 12)	$	56.6	$	50.6

Commitments and Contingencies (Tables)

12 Months Ended

Dec. 31, 2020

Commitments And Contingencies Disclosure [Abstract]

Summary of Approximate Percentage of TiO2 Sales by Volume

The table below shows the approximate percentage of our TiO₂ sales by volume for our significant markets, Europe and North America, for the last three years.

	2018		2019		2020
Europe	44	%	46	%	46	%
North America	37	%	34	%	36	%

Financial Instruments (Tables)

12 Months Ended

Dec. 31, 2020

Fair Value Disclosures [Abstract]

Financial Instruments not Carried at Fair Value but which Require Fair Value Disclosure

The following table presents the financial instruments that are not carried at fair value but which require fair value disclosure as of December 31, 2019 and 2020.

		December 31, 2019				December 31, 2020
		Carrying amount		Fair value		Carrying amount		Fair value
	(In millions)
Cash, cash equivalents and restricted cash		$	392.3	$	392.3	$	362.0	$	362.0
Long-term debt - Fixed rate Senior Notes			442.6		457.0		485.7		499.9

Quarterly Results of Operations (Tables)

12 Months Ended

Dec. 31, 2020

Selected Quarterly Financial Information [Abstract]

Quarterly Results of Operations

	Quarter ended
	March 31		June 30		September 30		December 31
	(In millions, except per share data)
Year ended December 31, 2019
Net sales	$	436.5	$	484.5	$	437.4	$	372.7
Gross margin		109.3		109.5		87.7		79.7
Net income		30.3		29.5		17.9		9.4
Basic and diluted income per share	$	.26	$	.25	$	.16	$	.08

Year ended December 31, 2020
Net sales	$	421.0	$	386.0	$	416.9	$	414.9
Gross margin		88.1		95.8		80.6		86.7
Net income		27.0		18.6		8.1		10.2
Basic and diluted income per share	$	.23	$	.16	$	.07	$	.09

Summary of Significant Accounting Policies - Additional Information (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Organization And Basis Of Presentation [Line Items]
Capitalized interest costs	$ 0.5	$ 0.6	$ 0.8
Income taxes paid, net	15.3	35.8	67.9
Cost of sales	1,287.6	1,344.9	1,099.7
Research and development costs	16.0	17.0	16.0
Shipping and Handling
Organization And Basis Of Presentation [Line Items]
Cost of sales	$ 112.0	111.0	105.0
Louisiana Pigment Company, L.P.
Organization And Basis Of Presentation [Line Items]
Owned manufacturing joint venture	50.00%
Valhi Inc
Organization And Basis Of Presentation [Line Items]
Income taxes paid, net	$ 6.6	$ 10.7
Income taxes refunds, net			$ 1.9
Valhi Inc \| Parent Company
Organization And Basis Of Presentation [Line Items]
Parent company ownership interest	50.00%
Valhi Inc \| NL Industries Inc.
Organization And Basis Of Presentation [Line Items]
Ownership percentage in company	83.00%
NL Industries Inc. \| Parent Company
Organization And Basis Of Presentation [Line Items]
Parent company ownership interest	30.00%
Contran
Organization And Basis Of Presentation [Line Items]
Controlling interest description	Consequently, at December 31, 2020, 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	92.00%

Summary of Significant Accounting Policies - Estimated Useful Lives of Assets (Detail)	12 Months Ended
	Dec. 31, 2020
Buildings and improvements \| Minimum
Property Plant And Equipment [Line Items]
Property plant and equipment useful life	10 years
Buildings and improvements \| Maximum
Property Plant And Equipment [Line Items]
Property plant and equipment useful life	40 years
Machinery and equipment \| Minimum
Property Plant And Equipment [Line Items]
Property plant and equipment useful life	3 years
Machinery and equipment \| Maximum
Property Plant And Equipment [Line Items]
Property plant and equipment useful life	20 years
Mine development costs
Property Plant And Equipment [Line Items]
Mine development costs	units-of-production

Geographic Information - Additional Information (Detail) - USD ($) $ in Millions	Dec. 31, 2020	Dec. 31, 2019
Non-U.S. Subsidiaries
Geographic Information [Line Items]
Net assets of non-US subsidiaries	$ 319	$ 313

Geographic Information - Net Sales and Property and Equipment by Geographical Information (Detail) - USD ($) $ in Millions	3 Months Ended								12 Months Ended
	Dec. 31, 2020	Sep. 30, 2020	Jun. 30, 2020	Mar. 31, 2020	Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Revenues From External Customers And Long Lived Assets [Line Items]
Net sales	$ 414.9	$ 416.9	$ 386.0	$ 421.0	$ 372.7	$ 437.4	$ 484.5	$ 436.5	$ 1,638.8	$ 1,731.1	$ 1,661.9
Net property and equipment	524.6				490.6				524.6	490.6
Germany
Revenues From External Customers And Long Lived Assets [Line Items]
Net property and equipment	228.2				221.9				228.2	221.9
Canada
Revenues From External Customers And Long Lived Assets [Line Items]
Net property and equipment	87.9				72.3				87.9	72.3
Belgium
Revenues From External Customers And Long Lived Assets [Line Items]
Net property and equipment	107.3				95.3				107.3	95.3
Norway
Revenues From External Customers And Long Lived Assets [Line Items]
Net property and equipment	86.7				86.3				86.7	86.3
Other
Revenues From External Customers And Long Lived Assets [Line Items]
Net property and equipment	$ 14.5				$ 14.8				14.5	14.8
Point of origin \| Reportable Geographical Components \| Germany
Revenues From External Customers And Long Lived Assets [Line Items]
Net sales									836.0	883.6	886.1
Point of origin \| Reportable Geographical Components \| United States
Revenues From External Customers And Long Lived Assets [Line Items]
Net sales									978.8	998.5	839.4
Point of origin \| Reportable Geographical Components \| Canada
Revenues From External Customers And Long Lived Assets [Line Items]
Net sales									319.5	328.7	307.2
Point of origin \| Reportable Geographical Components \| Belgium
Revenues From External Customers And Long Lived Assets [Line Items]
Net sales									249.5	270.7	272.2
Point of origin \| Reportable Geographical Components \| Norway
Revenues From External Customers And Long Lived Assets [Line Items]
Net sales									211.8	192.2	209.6
Point of origin \| Eliminations
Revenues From External Customers And Long Lived Assets [Line Items]
Net sales									(956.8)	(942.6)	(852.6)
Point of destination \| Europe
Revenues From External Customers And Long Lived Assets [Line Items]
Net sales									783.2	823.5	817.2
Point of destination \| North America
Revenues From External Customers And Long Lived Assets [Line Items]
Net sales									569.3	575.6	542.0
Point of destination \| Other
Revenues From External Customers And Long Lived Assets [Line Items]
Net sales									$ 286.3	$ 332.0	$ 302.7

Accounts and Other Receivables, Net - Accounts and Other Receivables, Net (Detail) - USD ($) $ in Millions	Dec. 31, 2020	Dec. 31, 2019
Accounts Notes And Loans Receivable [Line Items]
Allowance for doubtful accounts	$ (1.9)	$ (1.1)
Total	319.5	302.5
Trade receivables
Accounts Notes And Loans Receivable [Line Items]
Accounts and other receivables	294.8	270.5
Recoverable VAT and other receivables
Accounts Notes And Loans Receivable [Line Items]
Accounts and other receivables	21.3	25.4
Refundable income taxes
Accounts Notes And Loans Receivable [Line Items]
Refundable income taxes	$ 5.3	$ 7.7

Inventories, Net - Schedule of Inventories, Net (Detail) - USD ($) $ in Millions	Dec. 31, 2020	Dec. 31, 2019
Inventory Disclosure [Abstract]
Raw materials	$ 133.2	$ 124.4
Work in process	36.8	39.0
Finished products	269.2	269.9
Supplies	79.8	69.7
Total	$ 519.0	$ 503.0

Investment in TiO2 Manufacturing Joint Venture - Additional Information (Detail)	12 Months Ended
	Dec. 31, 2020 USD ($)
Schedule of Equity Method Investments [Line Items]
Equity earnings of LPC	$ 0
Louisiana Pigment Company, L.P.
Schedule of Equity Method Investments [Line Items]
Equity interest in LPC	50.00%
Products purchased from plant	50.00%
Venator Materials PLC \| Venator Group
Schedule of Equity Method Investments [Line Items]
Ownership interest percentage owned by parent	100.00%
Venator Investments LLC
Schedule of Equity Method Investments [Line Items]
Equity interest in LPC	50.00%

Investment in TiO2 Manufacturing Joint Venture - Components of Net Cash Distributions from (Contributions to) LPC (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Schedule of Equity Method Investments [Line Items]
Net distributions (contributions)	$ (12.8)	$ (9.3)	$ 4.0
Louisiana Pigment Company, L.P.
Schedule of Equity Method Investments [Line Items]
Distributions from LPC	32.7	40.6	34.3
Contributions to LPC	(45.5)	(49.9)	(30.3)
Net distributions (contributions)	$ (12.8)	$ (9.3)	$ 4.0

Investment in TiO2 Manufacturing Joint Venture - Summary of Balance Sheets of LPC (Detail) - USD ($) $ in Millions	Dec. 31, 2020	Dec. 31, 2019
ASSETS
Current assets	$ 1,218.3	$ 1,219.7
Net property and equipment	524.6	490.6
Total assets	2,036.7	1,965.8
LIABILITIES AND STOCKHOLDERS' EQUITY
Total liabilities and stockholders' equity	2,036.7	1,965.8
Louisiana Pigment Company, L.P.
ASSETS
Current assets	105.8	94.6
Net property and equipment	134.1	121.3
Total assets	239.9	215.9
LIABILITIES AND STOCKHOLDERS' EQUITY
Other liabilities, primarily current	30.6	32.8
Partners' equity	209.3	183.1
Total liabilities and stockholders' equity	$ 239.9	$ 215.9

- Definition

Sum of the carrying amounts as of the balance sheet date of all assets that are recognized. Assets are probable future economic benefits obtained or controlled by an entity as a result of past transactions or events.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- Definition

Sum of the carrying amounts as of the balance sheet date of all assets that are expected to be realized in cash, sold, or consumed within one year (or the normal operating cycle, if longer). Assets are probable future economic benefits obtained or controlled by an entity as a result of past transactions or events.

+ References + Details

- Definition

Sum of the carrying amounts as of the balance sheet date of all liabilities that are recognized. Liabilities are probable future sacrifices of economic benefits arising from present obligations of an entity to transfer assets or provide services to other entities in the future.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
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+ Details

Investment in TiO2 Manufacturing Joint Venture - Summary of Income Statements of LPC (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Cost and expenses:
Net income	$ 63.9	$ 87.1	$ 205.0
Louisiana Pigment Company, L.P.
Revenues and other income:
Total revenues and other income	336.1	353.2	332.9
Cost and expenses:
Cost of sales	335.7	352.8	332.5
General and administrative	0.4	0.4	0.4
Total costs and expenses	336.1	353.2	332.9
Louisiana Pigment Company, L.P. \| Kronos
Revenues and other income:
Total revenues and other income	167.8	176.2	165.9
Louisiana Pigment Company, L.P. \| Venator Investments
Revenues and other income:
Total revenues and other income	$ 168.3	$ 177.0	$ 167.0

Marketable Securities - Classification of Marketable Securities (Detail) - USD ($) $ in Millions	Dec. 31, 2020	Dec. 31, 2019
Marketable Securities [Line Items]
Market value	$ 2.2	$ 3.3
Cost basis	3.3	3.3
Unrealized loss	(1.1)
Level 1 \| Common stock \| Valhi
Marketable Securities [Line Items]
Market value	2.1	3.2
Cost basis	3.2	3.2
Unrealized loss	(1.1)
Level 1 \| Common stock \| NL And CompX
Marketable Securities [Line Items]
Market value	0.1	0.1
Cost basis	$ 0.1	$ 0.1

Marketable Securities - Additional Information (Detail) - Valhi Inc - Common stock - $ / shares shares in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Marketable Securities [Line Items]
Investments in publicly-traded shares	144,000	144,000
Quoted market price of per share	$ 15.20	$ 22.44
Reverse stock split description	1-for-12

Leases - Additional Information (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Lessee Lease Description [Line Items]
Operating lease payment	$ 7.6	$ 8.2
Operating lease, expense	7.6	8.2
Operating lease right-of-use assets	26.1	$ 29.0
Operating lease, liability	$ 25.5
Operating lease, weighted average remaining lease term	15 years	14 years
Operating lease, weighted average discount rate	4.80%	4.60%
New Operating Leases
Lessee Lease Description [Line Items]
Operating lease right-of-use assets	$ 2.5	$ 1.6
Operating lease, liability	$ 2.5	$ 1.6
Non Cancellable Operating Leases
Lessee Lease Description [Line Items]
Operating lease, expense			$ 15.0
Leverkusen Facility Land Lease
Lessee Lease Description [Line Items]
Agreements expiry period	2050
Current Tio2 production capacity in Leverkusen facility	33.00%
Operating lease, liability	$ 7.6

Leases - Schedule of Future Minimum Payment under Non-Cancellable Operating Lease Liabilities (Detail) - USD ($) $ in Millions	Dec. 31, 2020	Dec. 31, 2019
Leases [Abstract]
2021	$ 7.4
2022	4.1
2023	2.7
2024	1.8
2025	1.3
2026 and thereafter	20.1
Total remaining lease payments	37.4
Less imputed interest	11.9
Total lease obligations	25.5
Less current obligations	6.7	$ 6.2
Operating lease liabilities	$ 18.8	$ 22.2

Long-Term Debt - Components of Long-Term Debt (Detail) - USD ($) $ in Millions	Dec. 31, 2020	Dec. 31, 2019
Debt Instrument [Line Items]
Kronos International, Inc. 3.75% Senior Notes	$ 485.7	$ 442.6
Other	1.7	2.9
Total debt	487.4	445.5
Less current maturities	0.7	1.5
Total long-term debt	486.7	444.0
Kronos International, Inc \| 3.75% Senior Notes
Debt Instrument [Line Items]
Kronos International, Inc. 3.75% Senior Notes	$ 485.7	$ 442.6

Long-Term Debt - Senior Notes - Additional Information (Detail) € in Millions, $ in Millions		12 Months Ended
	Sep. 13, 2017 USD ($)	Dec. 31, 2020 USD ($)	Dec. 31, 2019 USD ($)	Sep. 13, 2017 EUR (€)
Senior Notes
Debt Instrument [Line Items]
Minimum amount of debt default for using customary default provisions	$ 50.0
Unamortized debt issuance costs		$ 4.7	$ 5.3
Kronos International, Inc \| 3.75% Senior Secured Notes due September 15, 2025
Debt Instrument [Line Items]
Debt instrument principal amount	$ 477.6			€ 400
Debt instrument interest rate	3.75%			3.75%
Debt instrument maturity date	Sep. 15, 2025
Debt instrument, interest payment terms		bear interest at 3.75% per annum, payable semi-annually on March 15 and September 15 of each year, payments began on March 15, 2018
Debt instrument, frequency of periodic payment of interest		semi-annually
Debt instrument, date of first semi-annual interest payment	--03-15
Debt instrument, date of second semi-annual interest payment	--09-15
Debt Instrument, date of first required semi-annual payment	Mar. 15, 2018
Debt instrument, redemption, description		have a maturity date of September 15, 2025. Prior to September 15, 2020, we had an option to redeem some or all of the Senior Notes at a price equal to 100% of the principal amount thereof, plus a “make-whole” premium (as defined in the indenture governing the Senior Notes) but we did not elect the option. On or after September 15, 2020, we may redeem the Senior Notes at redemption prices ranging from 102.813% of the principal amount, declining to 100% on or after September 15, 2023. In addition, on or before September 15, 2020, we had an option to redeem up to 40% of the Senior Notes with the net proceeds of certain public or private equity offerings at 103.75% of the principal amount but we did not elect this option. If we experience certain specified change of control events, we would be required to make an offer to purchase the Senior Notes at 101% of the principal amount. We would also be required to make an offer to purchase a specified portion of the Senior Notes at par value in the event that we generate a certain amount of net proceeds from the sale of assets outside the ordinary course of business, and such net proceeds are not otherwise used for specified purposes within a specified time period
Debt instrument redemption price percent if experience certain specified change of control events	101.00%
Kronos International, Inc \| 3.75% Senior Secured Notes due September 15, 2025 \| Collateral Pledged \| Direct Domestic Subsidiary of KII and Guarantors
Debt Instrument [Line Items]
Parent company ownership interest	100.00%			100.00%
Kronos International, Inc \| 3.75% Senior Secured Notes due September 15, 2025 \| Collateral Pledged \| Non US Subsidiary Directly Owned by KII or any Guarantor
Debt Instrument [Line Items]
Parent company ownership interest	65.00%			65.00%
Kronos International, Inc \| 3.75% Senior Secured Notes due September 15, 2025 \| Collateral Pledged \| Non US Subsidiary Directly Owned by KII or any Guarantor \| Non-voting Common Stock
Debt Instrument [Line Items]
Parent company ownership interest	100.00%			100.00%
Kronos International, Inc \| 3.75% Senior Secured Notes due September 15, 2025 \| Prior to September 15, 2020
Debt Instrument [Line Items]
Debt instrument, redemption price percentage	100.00%
Kronos International, Inc \| 3.75% Senior Secured Notes due September 15, 2025 \| On or After September 15, 2020
Debt Instrument [Line Items]
Debt instrument, redemption price percentage	102.813%
Kronos International, Inc \| 3.75% Senior Secured Notes due September 15, 2025 \| On or After September 15, 2023
Debt Instrument [Line Items]
Debt instrument, redemption price percentage	100.00%
Kronos International, Inc \| 3.75% Senior Secured Notes due September 15, 2025 \| On or Before September 15, 2020
Debt Instrument [Line Items]
Debt instrument, redemption price percentage	103.75%
Kronos International, Inc \| 3.75% Senior Secured Notes due September 15, 2025 \| On or Before September 15, 2020 \| Maximum
Debt Instrument [Line Items]
Debt instrument, percentage of debt that may be redeemed	40.00%

Long-Term Debt - Revolving Credit Facilities - Additional Information (Detail)	1 Months Ended		12 Months Ended
	Sep. 30, 2017	Jan. 31, 2017	Dec. 31, 2020 USD ($)	Dec. 31, 2019 USD ($)	Dec. 31, 2020 EUR (€)
Letter Of Credit
Debt Instrument [Line Items]
Sublimit maximum borrowing capacity			$ 15,000,000
European Revolving Credit Facility
Debt Instrument [Line Items]
Maximum borrowing capacity \| €					€ 90,000,000
Outstanding borrowings under this credit facility			0
Line of Credit Maturity	2022-09
Amount available for Borrowing			110,300,000		€ 90,000,000
Borrowings under credit facility during the period			0	$ 0
Repayments of lines of credit			$ 0	0
European Revolving Credit Facility \| EURIBOR
Debt Instrument [Line Items]
Debt instrument basis spread on variable rate			1.60%
North American Revolving Credit Facility
Debt Instrument [Line Items]
Maximum borrowing capacity			$ 125,000,000
Outstanding borrowings under this credit facility			$ 0	$ 0
Line of Credit Maturity		2022-01
Fixed charge coverage ratio, minimum value			100.00%
Amount available for Borrowing			$ 107,600,000
North American Revolving Credit Facility \| Canadian Subsidiary Revolving Borrowings Maximum
Debt Instrument [Line Items]
Maximum borrowing capacity			$ 25,000,000
Minimum \| North American Revolving Credit Facility \| London Interbank Offered Rate (LIBOR)
Debt Instrument [Line Items]
Debt instrument basis spread on variable rate			1.50%
Minimum \| North American Revolving Credit Facility \| Base Rate
Debt Instrument [Line Items]
Debt instrument basis spread on variable rate			0.50%
Maximum \| North American Revolving Credit Facility \| London Interbank Offered Rate (LIBOR)
Debt Instrument [Line Items]
Debt instrument basis spread on variable rate			2.00%
Maximum \| North American Revolving Credit Facility \| Base Rate
Debt Instrument [Line Items]
Debt instrument basis spread on variable rate			1.00%

Long-Term Debt - Aggregate Maturities of Long-Term Debt and Other (Detail) $ in Millions	Dec. 31, 2020 USD ($)
Long Term Debt By Maturity [Abstract]
2021	$ 0.7
2022	0.7
2023	0.3
2025	490.4
Gross maturities	492.1
Less debt issuance costs	4.7
Total	$ 487.4

Accounts Payable and Accrued Liabilities - Components of Accounts Payable and Accrued Liabilities (Detail) - USD ($) $ in Millions	Dec. 31, 2020	Dec. 31, 2019
Payables And Accruals [Abstract]
Accounts payable	$ 111.0	$ 137.2
Accrued sales discounts and rebates	29.1	32.4
Employee benefits	27.8	21.1
Operating lease liabilities	$ 6.7	$ 6.2
Operating Lease, Liability, Current, Statement of Financial Position [Extensible List]	us-gaap:AccountsPayableAndAccruedLiabilitiesCurrent	us-gaap:AccountsPayableAndAccruedLiabilitiesCurrent
Other	$ 41.3	$ 40.8
Total	$ 215.9	$ 237.7

Defined Contribution and Defined Benefit Retirement Plans - Additional Information (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Defined Benefit Plan Disclosure [Line Items]
Defined contribution benefit plan expense	$ 3.4	$ 3.1	$ 3.3
Defined Benefit Pension Plans
Defined Benefit Plan Disclosure [Line Items]
Expected contributions next fiscal year	17.0
Defined Benefit Pension Plans \| United States Pension Plans of US Entity, Defined Benefit
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan Funded Status Of Plan	$ 3.3	$ 3.7
Discount rate	2.20%	3.10%
Expected long-term rate of return	4.50%	5.50%	7.50%
Defined Benefit Pension Plans \| United States Pension Plans of US Entity, Defined Benefit \| CMRT
Defined Benefit Plan Disclosure [Line Items]
Expected long-term rate of return			7.50%
Defined Benefit Pension Plans \| United States Pension Plans of US Entity, Defined Benefit \| Equity Securities
Defined Benefit Plan Disclosure [Line Items]
Expected long-term rate of return	9.00%
Target asset allocation	38.00%
Defined Benefit Pension Plans \| United States Pension Plans of US Entity, Defined Benefit \| Debt Securities
Defined Benefit Plan Disclosure [Line Items]
Expected long-term rate of return	3.00%
Target asset allocation	54.00%
Defined Benefit Pension Plans \| United States Pension Plans of US Entity, Defined Benefit \| Multy-asset Strategies and CMRT
Defined Benefit Plan Disclosure [Line Items]
Expected long-term rate of return	2.00%
Defined Benefit Pension Plans \| United States Pension Plans of US Entity, Defined Benefit \| Assets valued at NAV
Defined Benefit Plan Disclosure [Line Items]
Target asset allocation	34.00%
Defined Benefit Pension Plans \| Foreign Pension Plans Defined Benefit
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan Funded Status Of Plan	$ 364.9	$ 300.7
Discount rate	1.00%	1.40%
Expected long-term rate of return	2.00%	2.90%	2.90%
Defined Benefit Pension Plans \| Canada \| Equity Securities \| Minimum
Defined Benefit Plan Disclosure [Line Items]
Target asset allocation	20.00%
Defined Benefit Pension Plans \| Canada \| Equity Securities \| Maximum
Defined Benefit Plan Disclosure [Line Items]
Target asset allocation	30.00%
Defined Benefit Pension Plans \| Canada \| Debt Securities \| Minimum
Defined Benefit Plan Disclosure [Line Items]
Target asset allocation	70.00%
Defined Benefit Pension Plans \| Canada \| Debt Securities \| Maximum
Defined Benefit Plan Disclosure [Line Items]
Target asset allocation	80.00%
Defined Benefit Pension Plans \| Norway \| Equity Securities
Defined Benefit Plan Disclosure [Line Items]
Expected long-term rate of return	5.00%
Target asset allocation	15.00%
Defined Benefit Pension Plans \| Norway \| Debt Securities
Defined Benefit Plan Disclosure [Line Items]
Expected long-term rate of return	3.00%
Target asset allocation	62.00%
Defined Benefit Pension Plans \| Norway \| Real Estate
Defined Benefit Plan Disclosure [Line Items]
Expected long-term rate of return	4.00%
Target asset allocation	14.00%
Defined Benefit Pension Plans \| Norway \| Other Investment Securities And Cash
Defined Benefit Plan Disclosure [Line Items]
Expected long-term rate of return	7.00%
Defined Benefit Pension Plans \| Norway \| Real Estate And Other Investments
Defined Benefit Plan Disclosure [Line Items]
Actual plan asset allocation	14.00%

Defined Contribution and Defined Benefit Retirement Plans- Benefit Payments (Detail) - Defined Benefit Pension Plans $ in Millions	Dec. 31, 2020 USD ($)
Defined Benefit Plan Disclosure [Line Items]
2021	$ 23.5
2022	24.9
2023	24.7
2024	26.7
2025	26.8
Next 5 years	$ 159.5

Defined Contribution and Defined Benefit Retirement Plans - Funded Status of Defined Benefit Pension Plans (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Amounts recognized in the balance sheet:
Accrued pension costs, noncurrent	$ (372.6)	$ (307.4)
Defined Benefit Pension Plans
Change in plan assets:
Fair value of plan assets at beginning of the year	452.1
Fair value of plan assets at end of year	497.9	452.1
United States \| Defined Benefit Pension Plans
Change in projected benefit obligations (PBO):
Benefit obligations at beginning of the year	18.3	16.9
Interest cost	0.6	0.7	$ 0.6
Actuarial losses	1.6	1.8
Benefits paid	(1.1)	(1.1)
Benefit obligations at end of the year	19.4	18.3	16.9
Change in plan assets:
Fair value of plan assets at beginning of the year	14.6	13.1
Actual return (loss) on plan assets	2.0	1.7
Employer contributions	0.6	0.9
Benefits paid	(1.1)	(1.1)
Fair value of plan assets at end of year	16.1	14.6	13.1
Funded status	(3.3)	(3.7)
Amounts recognized in the balance sheet:
Accrued pension costs, current	(0.1)	(0.1)
Accrued pension costs, noncurrent	(3.2)	(3.6)
Total	(3.3)	(3.7)
Amount recognized in accumulated other comprehensive loss, Actuarial losses	10.9	11.3
Accumulated benefit obligations (ABO)	19.4	18.3
Foreign Pension Plans Defined Benefit \| Defined Benefit Pension Plans
Change in projected benefit obligations (PBO):
Benefit obligations at beginning of the year	738.2	658.7
Service cost	13.3	12.8	11.6
Interest cost	10.0	13.3	13.5
Participant contributions	1.8	1.6
Actuarial losses	46.6	81.5
Settlements		(1.0)
Change in currency exchange rates	58.6	(7.2)
Benefits paid	(21.8)	(21.5)
Benefit obligations at end of the year	846.7	738.2	658.7
Change in plan assets:
Fair value of plan assets at beginning of the year	437.5	400.3
Actual return (loss) on plan assets	18.7	45.1
Employer contributions	16.0	15.3
Participant contributions	1.8	1.6
Settlements		(1.0)
Change in currency exchange rates	29.6	(2.3)
Benefits paid	(21.8)	(21.5)
Fair value of plan assets at end of year	481.8	437.5	$ 400.3
Funded status	(364.9)	(300.7)
Amounts recognized in the balance sheet:
Noncurrent pension asset	4.5	3.1
Accrued pension costs, noncurrent	(369.4)	(303.8)
Total	(364.9)	(300.7)
Amount recognized in accumulated other comprehensive loss, Actuarial losses	304.5	285.3
Amount recognized in accumulated other comprehensive loss, Prior service cost	0.8	1.0
Amount recognized in accumulated other comprehensive loss, Total	305.3	286.3
Accumulated benefit obligations (ABO)	$ 819.7	$ 712.2

Defined Contribution and Defined Benefit Retirement Plans - Components of Net Periodic Benefit Cost (Credit) (Detail) - Defined Benefit Pension Plans - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Foreign Pension Plans Defined Benefit
Defined Benefit Plan Disclosure [Line Items]
Service cost	$ 13.3	$ 12.8	$ 11.6
Interest cost	10.0	13.3	13.5
Expected return on plan assets	(8.7)	(11.7)	(12.0)
Recognized actuarial losses	17.3	12.8	13.1
Amortization of prior service cost	0.2	0.2	0.2
Total	32.1	27.4	26.4
United States
Defined Benefit Plan Disclosure [Line Items]
Interest cost	0.6	0.7	0.6
Expected return on plan assets	(0.6)	(0.7)	(1.0)
Recognized actuarial losses	0.6	0.6	0.6
Total	$ 0.6	$ 0.6	$ 0.2

Defined Contribution and Defined Benefit Retirement Plans- Schedule of Defined Benefit Pension Plans Balances (for which Accumulated Benefit Obligation Exceeds Fair Value of Plan Assets) (Detail) - Foreign Pension Plans Defined Benefit - Defined Benefit Pension Plans - USD ($) $ in Millions	Dec. 31, 2020	Dec. 31, 2019
Defined Benefit Plan Disclosure [Line Items]
Projected Benefit Obligation (PBO)	$ 790.9	$ 685.4
Accumulated Benefit Obligation (ABO)	768.1	663.3
Fair value of plan assets	$ 421.5	$ 381.7

Defined Contribution and Defined Benefit Retirement Plans - Schedule of Assumptions Used (Detail) - Foreign Pension Plans Defined Benefit - Defined Benefit Pension Plans	Dec. 31, 2020	Dec. 31, 2019
Defined Benefit Plan Disclosure [Line Items]
Discount rate	1.00%	1.40%
Increase in future compensation levels	2.60%	2.60%

Defined Contribution and Defined Benefit Retirement Plans- Weighted Average Rate Assumptions Used in Determining Net Periodic Pension Cost (Detail) - Defined Benefit Pension Plans	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Foreign Pension Plans Defined Benefit
Defined Benefit Plan Disclosure [Line Items]
Discount rate	1.40%	2.10%	2.10%
Increase in future compensation levels	2.60%	2.60%	2.60%
Long-term return on plan assets	2.00%	2.90%	2.90%
United States
Defined Benefit Plan Disclosure [Line Items]
Discount rate	3.10%	4.10%	3.50%
Long-term return on plan assets	4.50%	5.50%	7.50%

Defined Contribution and Defined Benefit Retirement Plans - Changes In Benefit Obligations Recognized In Accumulated Other Comprehensive Income (Loss) (Detail) - Defined Benefit Pension Plans - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Defined Benefit Plan Disclosure [Line Items]
Net actuarial losses	$ 36.8	$ 48.5	$ 24.3
Net actuarial losses	17.9	13.4	13.7
Prior service cost	0.2	0.2	0.2
Total	$ (18.7)	$ (34.9)	$ (10.4)

Defined Contribution and Defined Benefit Retirement Plans- Composition of Pension Plan Assets (Detail) - Defined Benefit Pension Plans - USD ($) $ in Millions	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Defined Benefit Plan Disclosure [Line Items]
Pension plan assets	$ 497.9	$ 452.1
Foreign Pension Plans Defined Benefit
Defined Benefit Plan Disclosure [Line Items]
Pension plan assets	481.8	437.5	$ 400.3
Germany
Defined Benefit Plan Disclosure [Line Items]
Pension plan assets	292.5	264.5
Other
Defined Benefit Plan Disclosure [Line Items]
Pension plan assets	18.1	15.2
United States
Defined Benefit Plan Disclosure [Line Items]
Pension plan assets	16.1	14.6	$ 13.1
Level 1
Defined Benefit Plan Disclosure [Line Items]
Pension plan assets	167.9	155.9
Level 1 \| Other
Defined Benefit Plan Disclosure [Line Items]
Pension plan assets	4.3	4.2
Level 2
Defined Benefit Plan Disclosure [Line Items]
Pension plan assets	10.1	8.7
Level 3
Defined Benefit Plan Disclosure [Line Items]
Pension plan assets	314.3	283.1
Level 3 \| Germany
Defined Benefit Plan Disclosure [Line Items]
Pension plan assets	292.5	264.5
Level 3 \| Other
Defined Benefit Plan Disclosure [Line Items]
Pension plan assets	13.8	11.0
Assets Measured at NAV
Defined Benefit Plan Disclosure [Line Items]
Pension plan assets	5.6	4.4
Local Currency Equities Member \| Norway
Defined Benefit Plan Disclosure [Line Items]
Pension plan assets	3.2	1.6
Local Currency Equities Member \| Canada
Defined Benefit Plan Disclosure [Line Items]
Pension plan assets	0.2	8.3
Local Currency Equities Member \| Level 1 \| Norway
Defined Benefit Plan Disclosure [Line Items]
Pension plan assets	3.2	1.6
Local Currency Equities Member \| Level 1 \| Canada
Defined Benefit Plan Disclosure [Line Items]
Pension plan assets	0.2	8.3
Non Local Currency Equities \| Norway
Defined Benefit Plan Disclosure [Line Items]
Pension plan assets	6.3	4.2
Non Local Currency Equities \| Canada
Defined Benefit Plan Disclosure [Line Items]
Pension plan assets	26.6	16.3
Non Local Currency Equities \| Level 1 \| Norway
Defined Benefit Plan Disclosure [Line Items]
Pension plan assets	6.3	4.2
Non Local Currency Equities \| Level 1 \| Canada
Defined Benefit Plan Disclosure [Line Items]
Pension plan assets	26.6	16.3
Local Currency Fixed Income \| Norway
Defined Benefit Plan Disclosure [Line Items]
Pension plan assets	26.4	22.8
Local Currency Fixed Income \| Canada
Defined Benefit Plan Disclosure [Line Items]
Pension plan assets	87.3	80.9
Local Currency Fixed Income \| Level 1 \| Norway
Defined Benefit Plan Disclosure [Line Items]
Pension plan assets	16.3	14.1
Local Currency Fixed Income \| Level 1 \| Canada
Defined Benefit Plan Disclosure [Line Items]
Pension plan assets	87.3	80.9
Local Currency Fixed Income \| Level 2 \| Norway
Defined Benefit Plan Disclosure [Line Items]
Pension plan assets	10.1	8.7
Cash And Other \| Norway
Defined Benefit Plan Disclosure [Line Items]
Pension plan assets	5.5	8.2
Cash And Other \| Canada
Defined Benefit Plan Disclosure [Line Items]
Pension plan assets	0.9	0.6
Cash And Other \| United States
Defined Benefit Plan Disclosure [Line Items]
Pension plan assets	1.7	1.8
Cash And Other \| Level 1 \| Norway
Defined Benefit Plan Disclosure [Line Items]
Pension plan assets	4.8	7.4
Cash And Other \| Level 1 \| Canada
Defined Benefit Plan Disclosure [Line Items]
Pension plan assets	0.9	0.6
Cash And Other \| Level 1 \| United States
Defined Benefit Plan Disclosure [Line Items]
Pension plan assets	1.3	1.4
Cash And Other \| Level 3 \| Norway
Defined Benefit Plan Disclosure [Line Items]
Pension plan assets	0.7	0.8
Cash And Other \| Assets Measured at NAV \| United States
Defined Benefit Plan Disclosure [Line Items]
Pension plan assets	0.4	0.4
Non Local Currency Fixed Income \| Norway
Defined Benefit Plan Disclosure [Line Items]
Pension plan assets	7.7	8.3
Non Local Currency Fixed Income \| Level 1 \| Norway
Defined Benefit Plan Disclosure [Line Items]
Pension plan assets	7.7	8.3
Real Estate \| Norway
Defined Benefit Plan Disclosure [Line Items]
Pension plan assets	7.1	6.6
Real Estate \| Level 3 \| Norway
Defined Benefit Plan Disclosure [Line Items]
Pension plan assets	7.1	6.6
Equity \| United States
Defined Benefit Plan Disclosure [Line Items]
Pension plan assets	6.3	5.8
Equity \| Level 1 \| United States
Defined Benefit Plan Disclosure [Line Items]
Pension plan assets	0.9	1.6
Equity \| Level 3 \| United States
Defined Benefit Plan Disclosure [Line Items]
Pension plan assets	0.2	0.2
Equity \| Assets Measured at NAV \| United States
Defined Benefit Plan Disclosure [Line Items]
Pension plan assets	5.2	4.0
Fixed Income \| United States
Defined Benefit Plan Disclosure [Line Items]
Pension plan assets	8.1	7.0
Fixed Income \| Level 1 \| United States
Defined Benefit Plan Disclosure [Line Items]
Pension plan assets	$ 8.1	$ 7.0

Defined Contribution and Defined Benefit Retirement Plans - Rollforward of Change in Fair Value of Level 3 Assets (Detail) - Level 3 - Defined Benefit Pension Plans - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Fair Value Assets Measured On Recurring Basis Unobservable Input Reconciliation [Line Items]
Fair value at beginning of year	$ 283.1	$ 258.0
Gain on assets held at end of year	4.2	30.2
Gain on assets sold during the year		0.1
Assets purchased	14.4	16.0
Assets sold	(14.1)	(14.9)
Currency exchange rate fluctuations	26.7	(6.3)
Fair value at end of year	$ 314.3	$ 283.1

Other Noncurrent Liabilities - Components of Other Noncurrent Liabilities (Detail) - USD ($) $ in Millions	Dec. 31, 2020	Dec. 31, 2019
Other Liabilities Noncurrent [Abstract]
Accrued postretirement benefits	$ 8.7	$ 8.0
Employee benefits	6.2	6.0
Other	11.8	14.2
Total	$ 26.7	$ 28.2

Other Noncurrent Liabilities - Additional Information (Detail) $ in Millions	3 Months Ended
	Dec. 31, 2020 USD ($)
Other Liabilities Noncurrent [Abstract]
Out-of-period adjustment	$ 3.9
Out-of-period adjustment net of income taxes	$ 2.9

Income Taxes - Components of Income Taxes and Comprehensive Provision for Income Taxes Allocation (Detail) - USD ($) $ in Millions	3 Months Ended		12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Schedule Of Income Tax [Line Items]
U.S.			$ 20.9	$ 37.9	$ 32.8
Non-U.S.			59.1	83.2	261.0
Income before income taxes			80.0	121.1	293.8
Expected tax expense, at U.S. federal statutory income tax rate of 21%			16.8	25.4	61.7
Non-U.S. tax rates			0.7	5.4	21.0
Incremental net tax expense (benefit) on earnings and losses of U.S. and non-U.S. companies			(5.5)	(4.3)	1.3
Valuation allowance			0.8	0.7
Transition Tax	$ (1.7)	$ 76.2			(1.7)
Global intangible low-tax income, net			2.7	2.4	3.7
Tax rate changes			(0.3)	5.5	(0.2)
Refund of prior tax payments, net			(0.1)	(2.1)
Adjustment to the reserve for uncertain tax positions, net			0.1	0.7	2.1
Nondeductible expenses			0.9	1.4	1.6
U.S. state income taxes and other, net				(1.1)	0.7
Income tax expense			16.1	34.0	88.8
Current payable:
U.S. federal and state			4.8	5.5	12.0
Non-U.S.			14.9	21.9	51.1
Total			19.7	27.4	63.1
Noncurrent payable - U.S. federal					(1.6)
Deferred income taxes (benefit):
U.S. federal and state			(2.6)	0.8	(1.8)
Non-U.S.			(1.0)	5.8	29.1
Total			(3.6)	6.6	27.3
Income tax expense			16.1	34.0	88.8
Comprehensive provision for income taxes allocable to:
Net income			16.1	34.0	88.8
Other comprehensive income (loss):
Total			9.9	20.1	85.0
Defined Benefit Pension Plans
Other comprehensive income (loss):
Benefit plans			(6.0)	(13.7)	(3.6)
OPEB
Other comprehensive income (loss):
Benefit plans			$ (0.2)	$ (0.2)	(0.2)
Canada - Germany APA
Schedule Of Income Tax [Line Items]
APA					$ (1.4)

Income Taxes - Components of Income Taxes and Comprehensive Provision for Income Taxes Allocation (Parenthetical) (Detail)	12 Months Ended
	Dec. 31, 2020
Income Tax Disclosure [Abstract]
U.S. Federal statutory income tax rate	21.00%

Income Taxes - Components of Net Deferred Income Taxes (Detail) - USD ($) $ in Millions	Dec. 31, 2020	Dec. 31, 2019
Income Tax Disclosure [Abstract]
Inventories, Assets	$ 1.7	$ 3.5
Lease assets	6.4	5.9
Accrued OPEB costs, Assets	2.4	2.2
Accrued pension costs, Assets	100.0	79.8
Other accrued liabilities and deductible differences, Assets	11.7	9.3
Tax loss and tax credit carryforwards, Assets	86.9	80.0
Valuation allowance, Assets	(4.4)	(3.5)
Adjusted gross deferred tax assets	204.7	177.2
Netting by tax jurisdiction, Assets	(53.7)	(49.5)
Net noncurrent deferred tax asset	151.0	127.7
Property and equipment, Liabilities	(58.4)	(51.6)
Lease liabilities	(6.5)	(6.1)
Other taxable differences, Liabilities	(1.4)	(1.7)
Tax on unremitted earnings of non-U.S. subsidiaries, Liabilities	(12.0)	(10.8)
Adjusted gross deferred tax liabilities	(78.3)	(70.2)
Netting by tax jurisdiction, Liabilities	53.7	49.5
Net noncurrent deferred tax liability	$ (24.6)	$ (20.7)

Income Taxes - Additional Information (Detail) - USD ($)			3 Months Ended					12 Months Ended
	Mar. 27, 2020	Mar. 26, 2020	Mar. 31, 2020	Dec. 31, 2019	Dec. 31, 2018	Mar. 31, 2018	Dec. 31, 2017	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Income Tax [Line Items]
Deferred tax assets valuation allowance				$ 3,500,000				$ 4,400,000	$ 3,500,000
Transition tax					$ (1,700,000)		$ 76,200,000			$ (1,700,000)
Income tax liability payable period								8 years
Noncurrent payable to affiliate				56,600,000				$ 50,600,000	56,600,000
Current payable to affiliate				21,300,000				27,900,000	21,300,000
Current cash tax benefit								(14,900,000)	(21,900,000)	(51,100,000)
Non-cash deferred income tax benefit								1,000,000.0	(5,800,000)	(29,100,000)
Business interest income, adjusted taxable income		30.00%
CARES act of 2020, Business interest income, adjusted taxable income	50.00%
Cash tax benefit due to reversal of valuation allowance			$ 500,000
Amount of interest and penalties				0	$ 0			0	$ 0	$ 0
Estimated unrecognized tax benefits decrease amount for next twelve months								700,000
Unrecognized tax benefits that would impact effective tax rate								$ 4,100,000
U.S. - Canada APA
Income Tax [Line Items]
Advance Pricing Agreement, description								As a result of prior audits in certain jurisdictions, which are now settled, in 2008 we filed Advance Pricing Agreement Requests with the tax authorities in the U.S., Canada and Germany. These requests have been under review with the respective tax authorities since 2008 and prior to 2016, it was uncertain whether an agreement would be reached between the tax authorities and whether we would agree to execute and finalize such agreements. During the first quarter of 2018, our German subsidiary executed and finalized the related Advance Pricing Agreement with the Competent Authority for Germany effective for tax years 2005 - 2017. In the first quarter of 2018, we recognized a net $1.4 million non-cash income tax benefit related to an APA tax settlement payment between our German and Canadian subsidiaries.
Canada - Germany APA \| German Subsidiary
Income Tax [Line Items]
Noncash income tax benefit related to APA tax settlement payment						$ 1,400,000
Valhi \| Income Tax Payable
Income Tax [Line Items]
Payable to affiliate								$ 56,600,000
Noncurrent payable to affiliate								50,600,000
Current payable to affiliate								6,000,000.0
Corporate Purposes
Income Tax [Line Items]
Deferred tax assets valuation allowance								0
Germany
Income Tax [Line Items]
Income tax benefit				3,000,000.0
Current cash tax benefit				1,500,000
Non-cash deferred income tax benefit				1,500,000
Non-cash deferred income tax expense				$ 5,500,000
Germany \| Corporate Purposes
Income Tax [Line Items]
Net operating loss carryforwards								531,000,000
Belgium \| Corporate Purposes
Income Tax [Line Items]
Net operating loss carryforwards								$ 20,000,000

Income Taxes - Changes in Amount of Uncertain Tax Positions (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Changes in unrecognized tax benefits:
Unrecognized tax benefits at beginning of year	$ 3.9	$ 4.1	$ 2.1
Net increase (decrease):
Tax positions taken in prior periods	(0.3)	(0.8)	1.4
Tax positions taken in current period	0.6	0.7	0.7
Lapse due to applicable statute of limitations	(0.5)
Change in currency exchange rates	0.4	(0.1)	(0.1)
Unrecognized tax benefits at end of year	$ 4.1	$ 3.9	$ 4.1

Stockholders' equity - Additional Information (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2016
Accumulated Other Comprehensive Income Loss [Line Items]
Existing long-term incentive plan				200,000
Shares available for awards under proposed long term incentive plan	127,400
Shares awarded under proposed long term incentive plan	13,500	9,000	5,600
Number of shares authorized for repurchase				2,000,000.0
Aggregate purchase price	$ 1.0	$ 3.0
Shares available for repurchase under the plan	1,563,519
Common stock
Accumulated Other Comprehensive Income Loss [Line Items]
Stock repurchased and acquired in market transactions	122,489	264,992
Aggregate purchase price	$ 1.0	$ 3.0

Stockholders' equity - Schedule of Changes in Accumulated Other Comprehensive Loss (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Accumulated Other Comprehensive Income Loss [Line Items]
Beginning Balance	$ 816.1	$ 839.8	$ 754.3
Ending Balance	796.5	816.1	839.8
Currency Translation
Accumulated Other Comprehensive Income Loss [Line Items]
Beginning Balance	(246.8)	(245.0)	(211.9)
Other comprehensive income (loss)	13.4	(1.8)	(33.1)
Ending Balance	(233.4)	(246.8)	(245.0)
Accumulated Defined Benefit Plans Adjustment \| Defined Benefit Pension Plans
Accumulated Other Comprehensive Income Loss [Line Items]
Beginning Balance	(202.2)	(180.0)	(172.8)
Other comprehensive income (loss)	13.4	9.5	10.4
Net actuarial gain (loss) arising during year	(25.7)	(31.7)	(17.6)
Ending Balance	(214.5)	(202.2)	(180.0)
Accumulated Defined Benefit Plans Adjustment \| OPEB Plans
Accumulated Other Comprehensive Income Loss [Line Items]
Beginning Balance	0.2	0.7	1.2
Other comprehensive income (loss)	(0.2)	(0.3)	(0.3)
Net actuarial gain (loss) arising during year	(0.3)	(0.2)	(0.2)
Ending Balance	(0.3)	0.2	0.7
Marketable Securities
Accumulated Other Comprehensive Income Loss [Line Items]
Beginning Balance			4.8
Marketable Securities \| Change in Accounting Principle - ASU 2016-01
Accumulated Other Comprehensive Income Loss [Line Items]
Beginning Balance			(4.8)
Total Accumulated Other Comprehensive Loss
Accumulated Other Comprehensive Income Loss [Line Items]
Beginning Balance	(448.8)	(424.3)	(378.7)
Balance at beginning of period, as adjusted	(448.8)	(424.3)	(383.5)
Other comprehensive income (loss)	0.6	(24.5)	(40.8)
Ending Balance	$ (448.2)	$ (448.8)	(424.3)
Total Accumulated Other Comprehensive Loss \| Change in Accounting Principle - ASU 2016-01
Accumulated Other Comprehensive Income Loss [Line Items]
Beginning Balance			$ (4.8)

Related Party Transactions - Summary of Receivables from and Payables to Affiliates (Detail) - USD ($) $ in Millions	Dec. 31, 2020	Dec. 31, 2019
Related Party Transaction [Line Items]
Current receivable from affiliate	$ 3.5	$ 6.9
Current payable to affiliate	27.9	21.3
Noncurrent payable to affiliate	50.6	56.6
Other Affiliates \| Other Receivable
Related Party Transaction [Line Items]
Current receivable from affiliate	3.5	2.2
Louisiana Pigment Company, L.P. \| Trade Items
Related Party Transaction [Line Items]
Current receivable from affiliate		4.7
Current payable to affiliate	19.3	16.4
Valhi \| Income Tax Payable
Related Party Transaction [Line Items]
Current payable to affiliate	8.6	4.9
Valhi \| Income Tax Payable
Related Party Transaction [Line Items]
Noncurrent payable to affiliate	$ 50.6	$ 56.6

Related Party Transactions - Additional Information (Detail) - USD ($)	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Insurance Premiums
Related Party Transaction [Line Items]
Expense transaction with affiliate	$ 19,100,000
Contran
Related Party Transaction [Line Items]
Expense transaction with affiliate	300,000	$ 200,000	$ 100,000
Sublease rent expense	400,000	100,000
Contran \| Intercorporate Services Agreement
Related Party Transaction [Line Items]
Intercorporate services fees	23,300,000	22,800,000	21,100,000
LPC \| Titanium Dioxide Pigments
Related Party Transaction [Line Items]
Purchase of TiO2	167,800,000	176,200,000	165,900,000
LPC \| Titanium Dioxide Feedstock
Related Party Transaction [Line Items]
Sales of feedstock ore to LPC	84,200,000	84,100,000	66,900,000
Valhi Inc \| Unsecured Revolving Demand Promissory Note
Related Party Transaction [Line Items]
Outstanding loans under promissory note	0	0
Maximum lending capacity	$ 40,000,000		$ 60,000,000
Percentage of Interest over Prime rate			1.00%
Interest payable quarterly for the loan	prime plus 1.00%
Valhi Inc \| Unsecured Revolving Demand Promissory Note \| Interest Income
Related Party Transaction [Line Items]
Interest income on loan	$ 300,000	500,000	$ 300,000
Tall Pines Insurance Inc and EWIRE Inc \| Insurance Premiums
Related Party Transaction [Line Items]
Expense transaction with affiliate		$ 12,500,000	$ 10,400,000
Tall Pines Insurance Company \| Insurance Premiums
Related Party Transaction [Line Items]
Expense transaction with affiliate	$ 14,800,000

Commitments and Contingencies - Additional Information (Details) $ in Millions	12 Months Ended
	Dec. 31, 2020 USD ($) Customer	Dec. 31, 2019	Dec. 31, 2018
Commitment And Contingencies [Line Items]
TiO2 Customers \| Customer	4,000
Net Sales of TiO2	34.00%	36.00%	33.00%
Feedstock
Commitment And Contingencies [Line Items]
Minimum purchase commitments	$ 1,200
Various Raw Materials and Services
Commitment And Contingencies [Line Items]
Minimum purchase commitments	$ 86
Net Sales \| Product Concentration Risk \| Titanium Dioxide Pigments
Commitment And Contingencies [Line Items]
Approximate percent sales by volume	93.00%	94.00%	94.00%
Net Sales \| Customer Concentration Risk
Commitment And Contingencies [Line Items]
Approximate percent sales by volume	10.00%	10.00%

Commitments and Contingencies - Summary of Approximate Percentage of TiO2 Sales by Volume (Detail) - Net Sales - Geographic Concentration Risk	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
European
Schedule Of Net Sales By Geographical Segment [Line Items]
Approximate percent sales by volume	46.00%	46.00%	44.00%
North America
Schedule Of Net Sales By Geographical Segment [Line Items]
Approximate percent sales by volume	36.00%	34.00%	37.00%

Financial Instruments - Financial Instruments not Carried at Fair Value but which Require Fair Value Disclosure (Detail) - USD ($) $ in Millions	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Fair Value Disclosures [Abstract]
Cash, cash equivalents and restricted cash, Carrying amount	$ 362.0	$ 392.3	$ 374.7	$ 323.7
Long-term debt - Fixed rate Senior Notes, Carrying amount	485.7	442.6
Cash, cash equivalents and restricted cash, Fair value	362.0	392.3
Long-term debt - Fixed rate Senior Notes, Fair value	$ 499.9	$ 457.0

Financial Instruments - Additional Information (Detail) - Senior Notes	Dec. 31, 2020 EUR (€)
Financial Instrument At Fair Value [Line Items]
Debt instrument base principal amount	€ 1,000
Debt instrument estimated market price per 1000 principal amount	€ 1,019

Quarterly Results of Operations (Unaudited) - Quarterly Results of Operation (Detail) - USD ($) $ / shares in Units, $ in Millions	3 Months Ended								12 Months Ended
	Dec. 31, 2020	Sep. 30, 2020	Jun. 30, 2020	Mar. 31, 2020	Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Selected Quarterly Financial Information [Abstract]
Net sales	$ 414.9	$ 416.9	$ 386.0	$ 421.0	$ 372.7	$ 437.4	$ 484.5	$ 436.5	$ 1,638.8	$ 1,731.1	$ 1,661.9
Gross margin	86.7	80.6	95.8	88.1	79.7	87.7	109.5	109.3	351.2	386.2	562.2
Net income	$ 10.2	$ 8.1	$ 18.6	$ 27.0	$ 9.4	$ 17.9	$ 29.5	$ 30.3	$ 63.9	$ 87.1	$ 205.0
Basic and diluted income per share	$ 0.09	$ 0.07	$ 0.16	$ 0.23	$ 0.08	$ 0.16	$ 0.25	$ 0.26	$ 0.55	$ 0.75	$ 1.77

- Definition

Aggregate revenue less cost of goods and services sold or operating expenses directly attributable to the revenue generation activity.

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- Definition

The portion of profit or loss for the period, net of income taxes, which is attributable to the parent.

+ References

+ Details

- Definition

Amount, excluding tax collected from customer, of revenue from satisfaction of performance obligation by transferring promised good or service to customer. Tax collected from customer is tax assessed by governmental authority that is both imposed on and concurrent with specific revenue-producing transaction, including, but not limited to, sales, use, value added and excise.

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Quarterly Results of Operations - Additional Information (Detail) - USD ($) $ in Millions	3 Months Ended		12 Months Ended
	Mar. 31, 2020	Dec. 31, 2019	Dec. 31, 2020	Dec. 31, 2019
Schedule Of Quarterly Financial Information [Line Items]
Pre-tax insurance settlement gain			$ 1.5	$ 2.6
Insurance Claims Related to Property Damage
Schedule Of Quarterly Financial Information [Line Items]
Pre-tax insurance settlement gain	$ 1.5	$ 2.6
Germany
Schedule Of Quarterly Financial Information [Line Items]
Non-cash deferred income tax expense		5.5
Income tax benefit		$ 3.0