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Document and Entity Information - USD ($) $ in Millions	12 Months Ended
Document and Entity Information - USD ($) $ in Millions	Dec. 31, 2019	Feb. 28, 2020	Jun. 28, 2019
Cover [Abstract]
Document Type	10-K
Amendment Flag	false
Document Period End Date	Dec. 31, 2019
Document Fiscal Year Focus	2019
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		115,651,706
Entity Public Float			$ 344.1
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
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, 2019	Dec. 31, 2018
Current assets:
Cash and cash equivalents	$ 390.8	$ 373.3
Restricted cash	1.5	1.4
Accounts and other receivables, net	302.5	299.5
Receivables from affiliates	6.9	13.0
Inventories, net	503.0	497.9
Prepaid expenses and other	15.0	16.3
Total current assets	1,219.7	1,201.4
Other assets:
Investment in TiO2 manufacturing joint venture	90.2	81.3
Marketable securities	3.3	3.4
Operating lease right-of-use assets	29.0
Deferred income taxes	127.7	122.0
Other	5.3	3.6
Total other assets	255.5	210.3
Property and equipment:
Land	40.4	41.0
Buildings	211.4	211.7
Equipment	1,113.1	1,102.6
Mining properties	116.2	114.0
Construction in progress	54.9	38.0
Gross property and equipment	1,536.0	1,507.3
Less accumulated depreciation and amortization	1,045.4	1,020.9
Net property and equipment	490.6	486.4
Total assets	1,965.8	1,898.1
Current liabilities:
Current maturities of long-term debt	1.5	1.5
Accounts payable and accrued liabilities	237.7	195.8
Payables to affiliates	21.3	27.1
Income taxes	10.1	9.0
Total current liabilities	270.6	233.4
Noncurrent liabilities:
Long-term debt	444.0	455.1
Accrued pension costs	307.4	262.9
Payable to affiliate - income taxes	56.6	56.6
Operating lease liabilities	22.2
Deferred income taxes	20.7	21.5
Other	28.2	28.8
Total noncurrent liabilities	879.1	824.9
Stockholders' equity:
Common stock, $.01 par value; 240.0 shares authorized; 115.7 shares issued	1.2	1.2
Additional paid-in capital	1,396.2	1,399.1
Retained deficit	(132.5)	(136.2)
Accumulated other comprehensive loss	(448.8)	(424.3)
Total stockholders' equity	816.1	839.8
Total liabilities and stockholders' equity	1,965.8	1,898.1
Commitments and contingencies (Notes 12 and 15)

CONSOLIDATED BALANCE SHEETS (Parenthetical) - $ / shares	Dec. 31, 2019	Dec. 31, 2018
Statement Of Financial Position [Abstract]
Common stock, par value	$ 0.01	$ 0.01
Common stock, authorized	240,000,000	240,000,000
Common stock, shares issued	115,700,000	115,700,000

CONSOLIDATED STATEMENTS OF INCOME - USD ($) shares in Millions, $ in Millions	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Income Statement [Abstract]
Net sales	$ 1,731.1	$ 1,661.9	$ 1,729.0
Cost of sales	1,344.9	1,099.7	1,159.3
Gross margin	386.2	562.2	569.7
Selling, general and administrative expense	228.2	228.3	200.6
Other operating income (expense):
Currency transactions, net	2.0	10.1	(7.5)
Disposition of property and equipment	(0.2)	(0.2)	(0.4)
Other income, net	1.1	0.8	0.5
Corporate expense	(15.1)	(14.5)	(13.9)
Income from operations	145.8	330.1	347.8
Other income (expense):
Interest and dividend income	6.7	5.5	1.4
Insurance settlement gain	2.6
Marketable equity securities	(0.1)	(7.3)
Other components of net periodic pension and OPEB cost	(15.2)	(15.0)	(17.4)
Loss on prepayment of debt, net			(7.1)
Interest expense	(18.7)	(19.5)	(19.0)
Income before income taxes	121.1	293.8	305.7
Income tax expense (benefit)	34.0	88.8	(48.8)
Net income	$ 87.1	$ 205.0	$ 354.5
Net income per basic and diluted share	$ 0.75	$ 1.77	$ 3.06
Weighted average shares used in the calculation of net income per share	115.8	115.9	115.9

CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Net income	$ 87.1	$ 205.0	$ 354.5
Other comprehensive income (loss), net of tax:
Currency translation	(1.8)	(33.1)	57.7
Marketable securities			3.0
Interest rate swap			2.0
Total other comprehensive income (loss), net	(24.5)	(40.8)	74.1
Comprehensive income	62.6	164.2	428.6
Defined Benefit Pension Plans
Other comprehensive income (loss), net of tax:
Defined benefit plans	(22.2)	(7.2)	12.0
OPEB
Other comprehensive income (loss), net of tax:
Defined benefit plans	$ (0.5)	$ (0.5)	$ (0.6)

CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY - USD ($) $ in Millions	Total	Common stock	Additional paid-in capital	Retained earnings (deficit)	Accumulated other comprehensive income (loss)	Treasury stock
Beginning Balance at Dec. 31, 2016	$ 395.0	$ 1.2	$ 1,398.8	$ (552.2)	$ (452.8)
Balance as adjusted at Dec. 31, 2016					(452.8)
Net income	354.5			354.5
Other comprehensive income (loss), net of tax	74.1				74.1
Issuance of common stock	0.2		0.2
Dividends paid	(69.5)			(69.5)
Ending Balance at Dec. 31, 2017	754.3	1.2	1,399.0	(267.2)	(378.7)
Change in accounting principle - ASU 2016-01 at Dec. 31, 2017				4.8	(4.8)
Balance as adjusted at Dec. 31, 2017	754.3	1.2	1,399.0	(262.4)	(383.5)
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)
Balance as adjusted at Dec. 31, 2018					(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)

- Definition

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

+ References + Details

CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY (Parenthetical) - $ / shares	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Cash dividends per share	$ 0.72	$ 0.68	$ 0.60
Retained earnings (deficit)
Cash dividends per share	$ 0.72	$ 0.68	$ 0.60

CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Cash flows from operating activities:
Net income	$ 87.1	$ 205.0	$ 354.5
Depreciation	48.1	49.7	41.2
Amortization of operating lease right-of-use assets	6.8
Deferred income taxes	6.5	27.3	(151.6)
Benefit plan expense greater than cash funding	11.1	8.4	12.0
Marketable equity securities	0.1	7.3
Distributions from (contributions to) TiO2 manufacturing joint venture, net	(9.3)	4.0	(6.0)
Loss on prepayment of debt			7.1
Payment for termination of interest rate swap contract			(3.3)
Other, net	2.5	2.8	2.4
Change in assets and liabilities:
Accounts and other receivables, net	(6.8)	8.7	(52.7)
Inventories, net	(7.1)	(135.5)	(4.9)
Prepaid expenses	0.3	(5.3)	0.9
Accounts payable and accrued liabilities	24.6	16.4	20.7
Income taxes	(3.1)	(16.4)	19.2
Accounts with affiliates	(0.7)	15.4	41.3
Other noncurrent assets		1.5	(1.6)
Other noncurrent liabilities	0.2	(0.8)	(3.1)
Net cash provided by operating activities	160.3	188.5	276.1
Cash flows from investing activities:
Capital expenditures	(55.1)	(56.3)	(64.3)
Proceeds from insurance settlement	2.6
Net cash used in investing activities	(52.5)	(42.7)	(77.9)
Indebtedness:
Borrowings			731.5
Principal payments	(1.5)	(1.5)	(594.3)
Deferred financing fees		(0.1)	(8.9)
Dividends paid	(83.4)	(78.8)	(69.5)
Treasury stock acquired	(3.0)
Net cash provided by (used in) financing activities	(87.9)	(80.4)	58.8
Cash, cash equivalents and restricted cash - net change from:
Operating, investing and financing activities	19.9	65.4	257.0
Effect of exchange rate changes	(2.3)	(14.4)	14.4
Net change for the year	17.6	51.0	271.4
Balance at beginning of year	374.7	323.7	52.3
Balance at end of year	392.3	374.7	323.7
Cash paid for:
Interest, net of amounts capitalized	17.4	18.5	15.2
Income taxes	35.8	67.9	37.1
Accrual for capital expenditures	9.1	6.3	8.7
Valhi
Cash flows from investing activities:
Loans	(16.6)	(2.6)	(18.2)
Collections	$ 16.6	$ 16.2	$ 4.6

Summary of Significant Accounting Policies

12 Months Ended

Dec. 31, 2019

Accounting Policies [Abstract]

Summary of Significant Accounting Policies

Note 1 – Summary of significant accounting policies:

Organization and basis of presentation – At December 31, 2019, 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. At December 31, 2019, a majority of Contran’s outstanding voting stock is held directly by Lisa K. Simmons and Serena Simmons Connelly and various family trusts established for the benefit of Ms. Simmons and Ms. Connelly and their children and for which Ms. Simmons or Ms. Connelly, as applicable, serves as trustee. In addition, each of Ms. Simmons and Ms. Connelly serves as co-chair of the Contran board of directors. 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 Ms. Connelly and their children and for which a third-party financial institution serves as trustee. Consequently, at December 31, 2019, Ms. Simmons, Ms. Connelly 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.

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.

Derivatives and hedging activities – We recognize derivatives as either assets or liabilities measured at fair value. We recognize the effect of changes in the fair value of derivatives either in net income or other comprehensive income (loss), depending on the intended use of the derivative. See Note 16.

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 to 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. All of our restricted cash is classified as a current asset and is separately presented on the face of the statement of financial position.

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. Prior to 2018, any unrealized gains or losses on the securities were recognized through other comprehensive income, net of deferred income taxes. Beginning on January 1, 2018 with the adoption of Accounting Standards Update (ASU) 2016-01, Financial Instruments – Overall (Subtopic 825-10): Recognition of Financial Assets and Financial Liabilities, all of our marketable equity securities continue to be carried at fair value as noted above, but any unrealized gains or losses on the securities are now recognized in 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.

On January 1, 2019 we adopted ASU 2016-02, Leases (Topic 842). See Notes 7 and 17. 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 under this new ASU. Operating leases are included in operating lease right-of-use assets, current operating lease liabilities and noncurrent operating lease liabilities in our Consolidated Balance Sheet beginning January 1, 2019. See Note 9. This ASU permits companies to elect certain practical expedients upon adoption, and at adoption we elected the package of practical expedients related to, among other things, lease classification (in which existing leases classified as operating leases under prior GAAP are classified as an operating lease under the new ASU, and existing leases classified as a capital lease under prior GAAP are classified as a finance lease under the new ASU), 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 the new ASU).

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. For leases in effect as of the January 1, 2019 date of adoption of the new ASU, the right-of-use operating lease assets and liabilities were recognized based on the estimated present value of remaining lease payments over the remaining lease term as of the adoption date. For new leases entered into subsequent to the date of adoption of the new ASU, 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. For leases in effect as of the January 1, 2019 date of adoption of the new ASU, we used an estimated incremental borrowing rate for each lease on the date of adoption. For new leases entered into subsequent to the date of adoption of the new ASU, we use an estimated incremental borrowing rate for each lease as of the respective lease commencement date.

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, and in accordance with ASU 2016-02 the determination of the operating lease liabilities is based on the index or rate existing at the date of adoption of the new ASU (for leases in effect as of January 1, 2019) or the index or rate in effect as of the lease commencement date (for leases entered into subsequent to the date of adoption of the new ASU). 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 $2.0 million in 2017, $.8 million in 2018 and $.6 million in 2019. 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 made net payments of income taxes to Valhi of $16.8 million in 2017 and $10.7 million in 2019 and received net refunds of income taxes from Valhi of $1.9 million in 2018.

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, 2019, 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) enacted on December 22, 2017, 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.

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. Effective January 1, 2018 with the adoption of ASU 2014-09, Revenue from Contracts with Customers (Topic 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. Prior to the adoption of ASU 2014-09, we recorded sales when our products were shipped and title and other risks and rewards of ownership had passed to the customer, which was generally at the time of shipment (although in some instances shipping terms were FOB destination point, for which we did not recognize revenue until the product was received by our customer).

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 ASU 2014-09 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 ASU 2014-09, we do not disclose sales allocated to future shipments of partially completed contracts.

ASU 2014-09 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 $101 million in 2017, $105 million in 2018 and $111 million in 2019. We expense research and development costs as incurred, and these costs were $18 million in 2017, $16 million in 2018 and $17 million in 2019. We expense advertising costs as incurred and these costs were not material in any year presented.

Geographic information

12 Months Ended

Dec. 31, 2019

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, 2018 and 2019, the net assets of non-U.S. subsidiaries included in consolidated net assets approximated $384 million and $313 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,
	2017			2018			2019
	(In millions)
Net sales - point of origin:
United States	$	841.8		$	839.4		$	998.5
Germany		918.6			886.1			883.6
Canada		309.2			307.2			328.7
Belgium		279.9			272.2			270.7
Norway		216.4			209.6			192.2
Eliminations		(836.9	)		(852.6	)		(942.6	)
Total	$	1,729.0		$	1,661.9		$	1,731.1

Net sales - point of destination:
Europe	$	898.8		$	817.2		$	823.5
North America		519.4			542.0			575.6
Other		310.8			302.7			332.0
Total	$	1,729.0		$	1,661.9		$	1,731.1

	December 31,
	2018		2019
	(In millions)
Identifiable assets - net property and equipment:
Germany	$	232.1	$	221.9
Belgium		94.8		95.3
Norway		79.3		86.3
Canada		65.2		72.3
Other		15.0		14.8
Total	$	486.4	$	490.6

Accounts and Other Receivables, Net

12 Months Ended

Dec. 31, 2019

Receivables [Abstract]

Accounts and Other Receivables, Net

Note 3 – Accounts and other receivables, net:

	December 31,
	2018			2019
	(In millions)
Trade receivables	$	273.3		$	270.5
Recoverable VAT and other receivables		23.8			25.4
Refundable income taxes		3.6			7.7
Allowance for doubtful accounts		(1.2	)		(1.1	)
Total	$	299.5		$	302.5

Inventories, Net

12 Months Ended

Dec. 31, 2019

Inventory Disclosure [Abstract]

Inventories, Net

Note 4 – Inventories, net:

	December 31,
	2018		2019
	(In millions)
Raw materials	$	93.1	$	124.4
Work in process		23.5		39.0
Finished products		316.8		269.9
Supplies		64.5		69.7
Total	$	497.9	$	503.0

Investment in TiO2 Manufacturing Joint Venture

12 Months Ended

Dec. 31, 2019

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,
	2017			2018			2019
	(In millions)
Distributions from LPC	$	44.0		$	34.3		$	40.6
Contributions to LPC		(50.0	)		(30.3	)		(49.9	)
Net distributions (contributions)	$	(6.0	)	$	4.0		$	(9.3	)

Summary balance sheets of LPC are shown below:

	December 31,
	2018		2019
	(In millions)
ASSETS
Current assets	$	87.0	$	94.6
Property and equipment, net		119.6		121.3
Total assets	$	206.6	$	215.9

LIABILITIES AND PARTNERS' EQUITY
Other liabilities, primarily current	$	41.1	$	32.8
Partners' equity		165.5		183.1
Total liabilities and partners' equity	$	206.6	$	215.9

Summary income statements of LPC are shown below:

	Years ended December 31,
	2017		2018		2019
	(In millions)
Revenues and other income:
Kronos	$	157.5	$	165.9	$	176.2
Venator Investments		158.3		167.0		177.0
Total revenues and other income		315.8		332.9		353.2

Cost and expenses:
Cost of sales		315.4		332.5		352.8
General and administrative		.4		.4		.4
Total costs and expenses		315.8		332.9		353.2
Net income	$	-	$	-	$	-

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

Marketable Securities

12 Months Ended

Dec. 31, 2019

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. Prior to 2018, any unrealized gains or losses on the securities were recognized through other comprehensive income, net of deferred income taxes. Beginning on January 1, 2018 with the adoption of ASU 2016-01, all of our marketable equity securities continue to be carried at fair value as noted above, but any unrealized gains or losses on the securities are now recognized in Marketable equity securities on our Consolidated Statements of Income.

Marketable security	Fair value measurement level	Market value		Cost basis		Unrealized gain
		(In millions)
December 31, 2018:
Valhi common stock	1	$	3.3	$	3.2	$	.1
NL and CompX common stocks	1		.1		.1		-
Total		$	3.4	$	3.3	$	.1

December 31, 2019:
Valhi common stock	1	$	3.2	$	3.2	$	-
NL and CompX common stocks	1		.1		.1		-
Total		$	3.3	$	3.3	$	-

At December 31, 2018 and 2019, we held approximately 1.7 million shares of Valhi’s common stock. We also held a nominal number of shares of CompX and NL common stocks. At December 31, 2018 and 2019, the quoted per share market price of Valhi’s common stock was $1.93 and $1.87, respectively.

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, 2019

Leases [Abstract]

Leases

Note 7 – Leases:

We enter into various operating leases for manufacturing facilities, land and equipment. Beginning on January 1, 2019 with the adoption of ASU 2016-02, our operating leases are included in operating lease right-of-use assets, current operating lease liabilities and noncurrent operating lease liabilities in our Consolidated Balance Sheet. 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, our operating lease expense approximated $8.2 million (which amount approximates the amount of cash paid during the period for our operating leases included in the determination of our cash flows from operating activities). During 2019, variable lease expense and short-term lease expense were not material. During 2019, we entered into new operating leases which resulted in the recognition of $1.6 million in right-of-use operating lease assets and corresponding liabilities on our Consolidated Balance Sheet. At December 31, 2019, the weighted average remaining lease term of our operating leases was approximately 14 years and the weighted average discount rate associated with such leases was approximately 4.6%. 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, 2019, maturities of our operating lease liabilities were as follows:

Years ending December 31,	Amount
	(In millions)
2020	$	7.1
2021		6.3
2022		3.6
2023		2.4
2024		1.6
2025 and thereafter		19.4
Total remaining lease payments		40.4
Less imputed interest		12.0
Total lease obligations		28.4
Less current obligations		6.2
Long term lease obligations	$	22.2

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 subsequent to the January 1, 2019 adoption of the new ASU as a lease modification. Of the $28.4 million total lease obligations at December 31, 2019, $7.0 million relates to our Leverkusen facility land lease.

At December 31, 2019, we have no significant lease commitments that have not yet commenced.

Disclosures related to periods prior to adoption of the new lease standard

Net rent expense approximated $14 million in 2016, $16 million in 2017 and $15 million in 2018. At December 31, 2018, future minimum payments under non-cancellable operating leases having an initial or remaining term of more than one year were as follows:

Years ending December 31,	Amount
	(In millions)
2019	$	6.2
2020		5.0
2021		4.2
2022		3.2
2023		2.4
2024 and thereafter		21.5
Long term lease obligations	$	42.5

Approximately $17 million of the $42.5 million aggregate future minimum rental commitments at December 31, 2018 relates to our Leverkusen facility land lease discussed above. The minimum commitment amounts for such lease included in the table above for each year through the 2050 expiration of the lease are based upon the current annual rental rate as of December 31, 2018.

Long-Term debt

12 Months Ended

Dec. 31, 2019

Debt Disclosure [Abstract]

Long-Term Debt

Note 8 – Long-term debt:

	December 31,
	2018		2019
	(In millions)
Kronos International, Inc. 3.75% Senior Notes	$	452.4	$	442.6
Other		4.2		2.9
Total debt		456.6		445.5
Less current maturities		1.5		1.5
Total long-term debt	$	455.1	$	444.0

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). We used $338.6 million of the net proceeds of the Senior Notes to prepay in full the outstanding principal balance of our term loan (along with accrued and unpaid interest through the prepayment date) and $21.0 million to repay the then-outstanding balance under our North American revolving credit facility. The remaining net proceeds of the Senior Notes were available for our general corporate purposes. 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 may 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). 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 may 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. 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, 2019 is stated net of unamortized debt issuance costs of $5.3 million (December 31, 2018 - $6.3 million).

Term loan – During the first six months of 2017, we made our required quarterly term loan principal payments aggregating $1.8 million on our prior term loan indebtedness. Concurrent with the issuance of our Senior Notes, in September 2017, we voluntarily prepaid in full the outstanding $338.6 million principal balance of such term loan (and such term loan facility was terminated). As a result of such prepayment, we recognized a loss on prepayment of debt aggregating $7.1 million in the third quarter of 2017 consisting principally of the write-off of unamortized debt issuance costs and original issue discount associated with the term loan of $2.7 million and $.7 million, respectively, and $3.3 million in expense related to the early termination of our interest rate swap contract discussed in Note 16. Funds for the aggregate prepayment were provided by the net proceeds from the Senior Notes discussed above.

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 2018 and 2019. At December 31, 2019, there were no outstanding borrowings under this facility and we had approximately $104.8 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 2018 and 2019 and at December 31, 2019, 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, 2019 and the net debt to EBITDA financial test, the full €90 million amount of this facility ($100.8 million) was available for borrowing at December 31, 2019.

Aggregate maturities and other – Aggregate maturities of debt at December 31, 2019 are presented in the table below.

Years ending December 31,	Amount
	(In millions)
2020	$	1.5
2021		.7
2022		.7
2023		-
2024		-
2025 and thereafter		447.9
Gross maturities		450.8
Less debt issuance costs		5.3
Total	$	445.5

We are in compliance with all of our debt covenants at December 31, 2019.

Accounts Payable and Accrued Liabilities

12 Months Ended

Dec. 31, 2019

Payables And Accruals [Abstract]

Accounts Payable and Accrued Liabilities

Note 9 – Accounts payable and accrued liabilities:

	December 31,
	2018		2019
	(In millions)
Accounts payable	$	103.2	$	137.2
Accrued sales discounts and rebates		29.7		32.4
Operating lease liabilities		-		6.2
Employee benefits		27.9		21.1
Other		35.0		40.8
Total	$	195.8	$	237.7

Defined Contribution and Defined Benefit Retirement Plans

12 Months Ended

Dec. 31, 2019

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 $2.7 million in 2017, $3.3 million in 2018 and $3.1 million in 2019.

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 our 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 2020. Benefit payments to plan participants out of plan assets are expected to be the equivalent of:

Years ending December 31,	Amount
	(In millions)
2020	$	23.0
2021		23.7
2022		24.8
2023		24.6
2024		26.6
Next 5 years		151.6

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

	December 31,
	2018			2019
	(In millions)
Change in projected benefit obligations (PBO):
Benefit obligations at beginning of the year	$	681.9		$	658.7
Service cost		11.6			12.8
Interest cost		13.5			13.3
Participant contributions		1.6			1.6
Actuarial losses		5.8			81.5
Settlements		-			(1.0	)
Change in currency exchange rates		(33.7	)		(7.2	)
Benefits paid		(22.0	)		(21.5	)
Benefit obligations at end of the year		658.7			738.2

Change in plan assets:
Fair value of plan assets at beginning of the year		433.3			400.3
Actual return on plan assets		(5.6	)		45.1
Employer contributions		16.3			15.3
Participant contributions		1.6			1.6
Settlements		-			(1.0	)
Change in currency exchange rates		(23.3	)		(2.3	)
Benefits paid		(22.0	)		(21.5	)
Fair value of plan assets at end of year		400.3			437.5
Funded status	$	(258.4	)	$	(300.7	)

Amounts recognized in the balance sheet:
Noncurrent pension asset	$	.8		$	3.1
Noncurrent accrued pension costs		(259.2	)		(303.8	)
Total	$	(258.4	)	$	(300.7	)

Amounts recognized in accumulated other comprehensive loss:
Actuarial losses	$	250.3		$	285.3
Prior service cost		1.2			1.0
Total	$	251.5		$	286.3

Accumulated benefit obligations (ABO)	$	633.5		$	712.2

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 2017, 2018 and 2019 were recognized as components of our accumulated other comprehensive loss at December 31, 2016, 2017 and 2018, respectively, net of deferred income taxes.

	Years ended December 31,
	2017			2018			2019
	(In millions)
Net periodic pension cost (income):
Service cost benefits	$	11.4		$	11.6		$	12.8
Interest cost on PBO		13.2			13.5			13.3
Expected return on plan assets		(9.2	)		(12.0	)		(11.7	)
Recognized actuarial losses		13.0			13.1			12.8
Amortization of prior service cost		.2			.2			.2
Total	$	28.6		$	26.4		$	27.4

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,
	2018		2019
	(In millions)
Plans for which the ABO exceeds plan assets:
PBO	$	605.0	$	685.4
ABO		585.0		663.3
Fair value of plan assets		346.3		381.7

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, 2018 and 2019 are presented in the table below.

	December 31,
Rate	2018			2019
Discount rate		2.1	%		1.4	%
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 2017, 2018 and 2019 are presented in the table below.

	Years ended December 31,
Rate	2017			2018			2019
Discount rate		2.1	%		2.1	%		2.1	%
Increase in future compensation levels		2.6	%		2.6	%		2.6	%
Long-term return on plan assets		2.4	%		2.9	%		2.9	%

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,
	2018			2019
	(In millions)
Change in PBO:
Benefit obligations at beginning of the year	$	18.2		$	16.9
Interest cost		.6			.7
Actuarial losses (gains)		(.9	)		1.8
Benefits paid		(1.0	)		(1.1	)
Benefit obligations at end of the year		16.9			18.3

Change in plan assets:
Fair value of plan assets at beginning of the year		14.1			13.1
Actual return on plan assets		(.8	)		1.7
Employer contributions		.8			.9
Benefits paid		(1.0	)		(1.1	)
Fair value of plan assets at end of year		13.1			14.6
Funded status	$	(3.8	)	$	(3.7	)

Amounts recognized in the balance sheet:
Accrued pension costs:
Current	$	(.1	)	$	(.1	)
Noncurrent		(3.7	)		(3.6	)
Total	$	(3.8	)	$	(3.7	)

Amounts recognized in accumulated other comprehensive loss - actuarial losses	$	11.2		$	11.3

ABO	$	16.9		$	18.3

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 2017, 2018 and 2019 were recognized as components of our accumulated other comprehensive loss at December 31, 2016, 2017 and 2018 respectively, net of deferred income taxes.

	Years ended December 31,
	2017			2018			2019
	(In millions)
Net periodic pension cost (income):
Interest cost on PBO	$	.7		$	.6		$	.7
Expected return on plan assets		(1.0	)		(1.0	)		(.7	)
Recognized actuarial losses		.6			.6			.6
Total	$	.3		$	.2		$	.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, 2018 and 2019 are 4.1% and 3.1%, 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 2017, 2018 and 2019 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	2017			2018			2019
Discount rate		3.9	%		3.5	%		4.1	%
Long-term return on plan assets		7.5	%		7.5	%		5.5	%

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, 2018 and 2019 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 2018 and 2019. We expect approximately $17.7 million and $.2 million of the unrecognized actuarial losses and prior service costs, respectively, will be recognized as components of our consolidated net periodic defined benefit pension cost in 2020.

The table below details the changes in our consolidated other comprehensive income (loss) during 2017, 2018 and 2019.

	Years ended December 31,
	2017		2018			2019
	(In millions)
Changes in plan assets and benefit obligations recognized in other comprehensive income (loss):
Current year:
Net actuarial gain (loss)	$	3.5	$	(24.3	)	$	(48.5	)
Amortization of unrecognized:
Net actuarial losses		13.6		13.7			13.4
Prior service cost		.2		.2			.2
Total	$	17.3	$	(10.4	)	$	(34.9	)

At December 31, 2017, 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 2017 and 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. 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 11% to equity securities, 67% to fixed income securities, 12% 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 7%, 3%, 5% and 8%, 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 36% to equity securities, 49% 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%, 4% and 3%, 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 30% 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, 2018 and 2019 is shown in the table below.

	Fair Value Measurements at December 31, 2018
	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	$	241.5	$	-	$	-	$	241.5	$	-
Canada:
Local currency equities		6.5		6.5		-		-		-
Non local currency equities		13.3		13.3		-		-		-
Local currency fixed income		74.1		74.1		-		-		-
Cash and other		.5		.5		-		-		-
Norway:
Local currency equities		1.7		1.7		-		-		-
Non local currency equities		4.3		4.3		-		-		-
Local currency fixed income		20.4		14.9		5.5		-		-
Non local currency fixed income		6.1		6.1		-		-		-
Real estate		4.5		-		-		4.5		-
Cash and other		13.5		12.7		-		.8		-
U.S.
Equities		4.9		1.5		-		-		3.4
Fixed income		6.0		6.0		-		-		-
Cash and other		1.5		1.1		-		-		.4
CMRT		.7		-		-		.7		-
Other		13.9		3.4		-		10.5		-
Total	$	413.4	$	146.1	$	5.5	$	258.0	$	3.8

	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

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

	December 31,
	2018			2019
	(In millions)
Fair value at beginning of year	$	273.6		$	258.0
Gain (loss) on assets held at end of year		(4.6	)		30.2
Gain on assets sold during the year		-			.1
Assets purchased		14.1			16.0
Assets sold		(14.5	)		(14.9	)
Transfers in		.7			-
Currency exchange rate fluctuations		(11.3	)		(6.3	)
Fair value at end of year	$	258.0		$	283.1

Other Noncurrent Liabilities

12 Months Ended

Dec. 31, 2019

Other Liabilities Disclosure [Abstract]

Other Noncurrent Liabilities

Note 11 – Other noncurrent liabilities:

	December 31,
	2018		2019
	(In millions)
Accrued postretirement benefits	$	7.4	$	8.0
Employee benefits		7.3		6.0
Other		14.1		14.2
Total	$	28.8	$	28.2

Income Taxes

12 Months Ended

Dec. 31, 2019

Income Tax Disclosure [Abstract]

Income Taxes

Note 12 – Income taxes:

	Years ended December 31,
	2017			2018			2019
	(In millions)
Pre-tax income:
U.S.	$	38.6		$	32.8		$	37.9
Non-U.S.		267.1			261.0			83.2
Total	$	305.7		$	293.8		$	121.1

Expected tax expense, at U.S. federal statutory income tax rate of 35% in 2017 and 21% in 2018 and 2019	$	107.0		$	61.7		$	25.4
Non-U.S. tax rates		(13.2	)		21.0			5.4
Incremental net tax expense (benefit) on earnings and losses of U.S. and non-U.S. companies		(8.4	)		1.3			(4.3	)
Valuation allowance		(205.4	)		-			.7
Transition Tax		76.2			(1.7	)		-
Global intangible low-tax income, net		-			3.7			2.4
Tax rate changes		(.2	)		(.2	)		5.5
Canada - Germany APA		-			(1.4	)		-
Refund of prior tax payments, net		(.3	)		-			(2.1	)
Adjustment to the reserve for uncertain tax positions, net		(8.6	)		2.1			.7
Nondeductible expenses		1.7			1.6			1.4
U.S. state income taxes and other, net		2.4			.7			(1.1	)
Income tax expense (benefit)	$	(48.8	)	$	88.8		$	34.0

Components of income tax expense (benefit):
Current payable:
U.S. federal and state	$	3.0		$	12.0		$	5.5
Non-U.S.		37.5			51.1			21.9
		40.5			63.1			27.4

Noncurrent payable - U.S. federal		70.1			(1.6	)		-

Deferred income taxes (benefit):
U.S. federal and state		(13.7	)		(1.8	)		.8
Non-U.S.		(145.7	)		29.1			5.8
		(159.4	)		27.3			6.6
Income tax expense (benefit)	$	(48.8	)	$	88.8		$	34.0

Comprehensive provision for income taxes (benefit) allocable to:
Net income	$	(48.8	)	$	88.8		$	34.0
Other comprehensive income (loss):
Currency translation		19.8			-			-
Pension plans		5.6			(3.6	)		(13.7	)
OPEB plans		(.2	)		(.2	)		(.2	)
Marketable securities		1.6			-			-
Interest rate swap		1.1			-			-
Total	$	(20.9	)	$	85.0		$	20.1

The amount shown in the above 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 change in the aggregate amount of undistributed earnings of our Canadian subsidiary and, beginning in 2018, deferred income taxes (or deferred income tax benefits) associated with the current-year earnings of all of our non-U.S. subsidiaries (the undistributed earnings of our European subsidiaries were subject to a permanent reinvestment plan until December 31, 2017) 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, 2018 and 2019 are summarized in the following table.

	December 31,
	2018						2019
	Assets			Liabilities			Assets			Liabilities
	(In millions)
Tax effect of temporary differences related to:
Inventories	$	4.3		$	(3.1	)	$	5.8		$	(2.3	)
Property and equipment		-			(56.9	)		5.9			(57.7	)
Accrued OPEB costs		2.1			-			2.2			-
Accrued pension costs		73.7			-			79.8			-
Other accrued liabilities and deductible differences		10.4			-			9.3			-
Other taxable differences		-			(2.4	)		-			(1.7	)
Tax on unremitted earnings of non-U.S. subsidiaries		-			(11.3	)		-			(10.8	)
Tax loss and tax credit carryforwards		86.6			-			80.0			-
Valuation allowance		(2.9	)		-			(3.5	)		-
Adjusted gross deferred tax assets (liabilities)		174.2			(73.7	)		179.5			(72.5	)
Netting by tax jurisdiction		(52.2	)		52.2			(51.8	)		51.8
Net noncurrent deferred tax asset (liability)	$	122.0		$	(21.5	)	$	127.7		$	(20.7	)

We have substantial net operating loss (NOL) carryforwards in Germany (the equivalent of $501 million for German corporate tax purposes at December 31, 2019) and in Belgium (the equivalent of $8 million for Belgian corporate tax purposes at December 31, 2019), all of which have an indefinite carryforward period. As a result, we have or have had net deferred income tax assets with respect to these two jurisdictions, primarily related to these NOL carryforwards. The German corporate tax is similar to the U.S. federal income tax, and the German trade tax is similar to the U.S. state income tax (our German trade tax NOLs were fully utilized as of December 31, 2018). Prior to 2017, we concluded that we were required to recognize a non-cash deferred income tax asset valuation allowance under the more-likely-than-not recognition criteria with respect to our German and Belgian net deferred income tax assets. At December 31, 2016 such valuation allowance aggregated $173 million ($153 million with respect to Germany and $20 million with respect to Belgium). During the first six months of 2017, we recognized an aggregate non-cash deferred income tax benefit of $12.7 million as a result of a net decrease in such deferred income tax asset valuation allowance, due to utilizing a portion of both the German and Belgian NOL during the period. At June 30, 2017, we concluded we had sufficient positive evidence under the more-likely-than-not recognition criteria to support reversal of the entire valuation allowance related to our German and Belgian operations. In accordance with the ASC 740-270 guidance regarding accounting for income taxes at interim dates, the amount of the valuation allowance reversed at June 30, 2017 ($149.9 million, of which $141.9 million related to Germany and $8.0 million related to Belgium) was associated with our change in judgment at that date regarding the realizability of the related deferred income tax asset as it relates to future years (i.e. 2018 and after). A change in judgment regarding the realizability of deferred tax assets as it relates to the current year is considered in determining the estimated annual effective tax rate for the year and is recognized throughout the year, including interim periods subsequent to the date of the change in judgment. Accordingly, our income tax benefit in calendar year 2017 includes an aggregate non-cash deferred income tax benefit of $186.7 million associated with the reversal of the German and Belgian valuation allowance, comprised of $12.7 million recognized in the first half of 2017 (noted above) associated with the utilization of a portion of both the German and Belgian NOLs during such period, $149.9 million related to the portion of the valuation allowance reversed as of June 30, 2017 and $24.1 million recognized in the second half of 2017 associated with the utilization of a portion of both the German and Belgian NOLs during such period. Our deferred income tax asset valuation allowance increased $13.7 million in 2017 as a result of changes in currency exchange rates, which increase was recognized as part of other comprehensive income (loss).

On December 22, 2017, the 2017 Tax Act was enacted into law. This new tax legislation, among other changes, (i) reduced the U.S. Federal corporate income tax rate from 35% to 21% effective January 1, 2018; (ii) implemented a territorial tax system and imposed a one-time repatriation tax (Transition Tax) on the deemed repatriation of the post-1986 undistributed earnings of non-U.S. subsidiaries accumulated up through December 31, 2017, regardless of whether such earnings are repatriated; (iii) eliminated U.S. tax on future non-U.S. earnings (subject to certain exceptions); (iv) eliminated the domestic production activities deduction beginning in 2018; (v) eliminated the net operating loss carryback and provides for an indefinite carryforward period subject to an 80% annual usage limitation; (vi) allows for the expensing of certain capital expenditures; (vii) imposed a tax on global intangible low-tax income (GILTI) beginning in 2018; (viii) imposed a base erosion anti-abuse tax (BEAT) beginning in 2018; and (ix) amended the rules limiting the deduction for business interest expense beginning in 2018. Following the enactment of the 2017 Tax Act, the Securities and Exchange Commission issued Staff Accounting Bulletin (SAB) 118 to provide guidance on the accounting and reporting impacts of the 2017 Tax Act. SAB 118 states that companies should account for changes related to the 2017 Tax Act in the period of enactment if all information is available and the accounting can be completed. In situations where companies do not have enough information to complete the accounting in the period of enactment, a company must either 1) record an estimated provisional amount if the impact of the change can be reasonably estimated; or 2) continue to apply the accounting guidance that was in effect immediately prior to the 2017 Tax Act if the impact of the change cannot be reasonably estimated. If estimated provisional amounts are recorded, SAB 118 provided a measurement period of no longer than one year during which companies adjusted those amounts as additional information became available in the reporting period within the measurement period in which such adjustment is determined.

Under GAAP, we were required to revalue our net deferred tax asset associated with our U.S. net deductible temporary differences in the period in which the new tax legislation is enacted based on deferred tax balances as of the enactment date, to reflect the effect of such reduction in the corporate income tax rate. Our net deductible temporary differences as of December 31, 2017 were not materially different from our net deductible temporary differences as of the enactment date, accordingly revaluation of our net deductible temporary differences was based on our net deferred tax asset as of December 31, 2017. Such revaluation was recognized in continuing operations and was not material to us.

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 Transition Tax provisions imposing 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. The amounts recorded as of December 31, 2017 as a result of the 2017 Tax Act represented estimates based on information available at that date. We elected to pay such tax over an eight year period beginning in 2018. 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 of $76.2 million recognized in the fourth quarter of 2017. Pursuant to IRS guidance issued in 2019, our Transitional Tax installment for the 2019 tax year is due in April of 2020. Prior to the issuance of the new guidance, we anticipated paying such installment in 2019. Consequently, at December 31, 2019, taking into account our prior Transition Tax installments payments, the balance of our unpaid Transition Tax has not changed from the balance at December 31, 2018 and aggregates $62.6 million, which will be paid in annual installments over the remainder of the eight year period. Of such $62.6 million, $56.6 million is recorded as a noncurrent payable to affiliate (income taxes payable to Valhi) classified as a noncurrent liability in our Consolidated Balance Sheet at December 31, 2019, 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 2019 Transition Tax installment due within the next twelve months). We completed our analysis of the Transition Tax provisions within the prescribed measurement period ending December 22, 2018 pursuant to the guidance under SAB 118.

As a result of the implementation of a territorial tax system under the 2017 Tax Act, effective January 1, 2018, and the Transition Tax which in effect taxes the post-1986 undistributed earnings of our non-U.S. subsidiaries accumulated up through December 31, 2017, we determined effective December 31, 2017 that all of the post-1986 undistributed earnings of our European subsidiaries are not permanently reinvested. Accordingly, in the fourth quarter of 2017 we recognized an aggregate provisional non-cash deferred income tax expense of $4.5 million based on our reasonable estimates of the U.S. state and non-U.S. income tax and withholding tax liability attributable to all of such previously-considered permanently reinvested undistributed earnings through December 31, 2017. The amounts recorded as of December 31, 2017 as a result of the 2017 Tax Act represented estimates based on information currently available. We did not make any measurement-period adjustments to the provisional amounts recorded at December 31, 2017 for this item during 2018 because no new information became available during the period that required an adjustment. However, we recorded a non-cash deferred income tax expense of $2.4 million for the U.S. state and non-U.S. income tax and withholding tax liability attributable to the 2018 undistributed earnings of our non-U.S. subsidiaries in 2018, including withholding taxes related to the undistributed earnings of our Canadian subsidiary. We completed our analysis as it relates to the implementation of a territorial tax system under the 2017 Tax Act within the prescribed measurement period ending December 22, 2018 pursuant to the guidance under SAB 118.

We record GILTI tax as a current-period expense when incurred under the period cost method. We have evaluated the tax impact of GILTI and BEAT provisions and related U.S. tax credit provisions applicable to tax years beginning in 2018 based on the relevant statutes. We recognized a current cash income tax expense of $3.7 million and $2.4 million for GILTI in 2018 and 2019, respectively. 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. Similarly, we have evaluated the tax impact of BEAT and determined that the tax imposed under BEAT has no material impact to us as we have historically not entered into international payments between related parties that are unrelated to cost of goods sold. Our determinations under the GILTI, BEAT and related U.S. tax credit provisions are based on the relevant statutes and guidance provided under the regulations.

Certain U.S. deferred tax attributes of one of our non-U.S. subsidiaries, which subsidiary is treated as a dual resident for U.S. income tax purposes, were subject to various limitations. As a result, we had previously concluded that a deferred income tax asset valuation allowance was required to be recognized with respect to such subsidiary’s U.S. net deferred income tax asset because such assets did not meet the more-likely-than-not recognition criteria primarily due to (i) the various limitations regarding use of such attributes due to the dual residency; (ii) the dual resident subsidiary had a history of losses and absent distributions from our non-U.S. subsidiaries, which were previously not determinable, such subsidiary was expected to continue to generate losses; and (iii) a limited NOL carryforward period for U.S. tax purposes. Because we had concluded the likelihood of realization of such subsidiary’s net deferred income tax asset was remote, we had not previously disclosed such valuation allowance or the associated amount of the subsidiary’s net deferred income tax assets (exclusive of such valuation allowance). Primarily due to changes enacted under the 2017 Tax Act, we concluded we had sufficient positive evidence under the more-likely-than-not recognition criteria to support reversal of the entire valuation allowance related to such subsidiary’s net deferred income tax asset, which evidence included, among other things, (i) the inclusion under Transition Tax provisions of significant earnings for U.S. income tax purposes which significantly and positively impacts the ability of such deferred tax attributes to be utilized by us; (ii) the indefinite carryforward period for U.S. net operating losses incurred after December 31, 2017; (iii) an expectation of continued future profitability for our U.S. operations; and (iv) a positive taxable income basket for U.S. tax purposes in excess of the U.S. deferred tax asset related to the U.S. attributes of such subsidiary. Accordingly, in the fourth quarter of 2017 we recognized an $18.7 million non-cash deferred income tax benefit as a result of the reversal of such valuation allowance.

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.

At December 31, 2019, none of our U.S. and non-U.S. tax returns were under examination. 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 third quarter of 2017, our Canadian subsidiary executed and finalized an Advance Pricing Agreement with the Competent Authority for Canada (the “Canada-Germany APA”) effective for tax years 2005 - 2017. Pursuant to the terms of the Canada-Germany APA, the Canadian and German tax authorities agreed to certain prior year changes to taxable income of our Canadian and German subsidiaries. As a result of such agreed-upon changes, we reversed a significant portion of our reserve for uncertain tax positions and recognized a non-cash income tax benefit of $8.6 million related to such reversal ($8.1 million recognized in the third quarter of 2017). In addition, we recognized a $2.6 million non-cash income tax benefit related to an increase in our German NOLs and a $.6 million German cash tax refund related to the Canada-Germany APA in the third quarter of 2017.

•

During the first quarter of 2018, our German subsidiary executed and finalized the related Advance Pricing Agreement with the Competent Authority for Germany (the “Germany-Canada APA”) 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 may in the future examine 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.

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 2017, 2018 and 2019 was not material and at December 31, 2018 and 2019, 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 2017, 2018 and 2019:

	Years ended December 31,
	2017			2018			2019
	(In millions)
Changes in unrecognized tax benefits:
Unrecognized tax benefits at beginning of year	$	9.9		$	2.1		$	4.1
Net increase (decrease):
Tax positions taken in prior periods		(6.3	)		1.4			(.8	)
Tax positions taken in current period		.2			.7			.7
Lapse due to applicable statute of limitations		(.1	)		-			-
Settlements with taxing authorities		(2.3	)		-			-
Change in currency exchange rates		.7			(.1	)		(.1	)
Unrecognized tax benefits at end of year	$	2.1		$	4.1		$	3.9

At December 31, 2019, $2.1 million of our uncertain tax benefits is classified as a component of our noncurrent deferred tax asset. If our uncertain tax position at December 31, 2019 was recognized, a benefit of $3.9 million would affect our effective income tax rate. We currently estimate that our unrecognized tax benefits will not change materially during the next twelve months.

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 2016 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 2015 for Germany, 2016 for Belgium, 2014 for Canada and 2010 for Norway.

Stockholders' equity

12 Months Ended

Dec. 31, 2019

Equity [Abstract]

Stockholders' equity

Note 13 – Stockholders’ equity:

Long-term incentive compensation plan – Prior to 2017, our board of directors adopted a plan that provides for the award of stock to our board of directors, and up to a maximum of 200,000 shares can be awarded under this plan. We awarded 8,000 shares in 2017, 5,600 shares in 2018 and 9,000 shares in 2019 under this plan. 140,900 shares are available for future award at December 31, 2019.

Stock repurchase program – Prior to 2017, 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 2017 or 2018 and 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. At December 31, 2019, 1,686,008 shares are available for repurchase under this stock repurchase program.

Accumulated other comprehensive loss – Changes in accumulated other comprehensive loss for 2017, 2018 and 2019 are presented in the table below.

	Years ended December 31,
	2017			2018			2019
	(In millions)
Accumulated other comprehensive loss, net of tax:
Currency translation:
Balance at beginning of year	$	(269.6	)	$	(211.9	)	$	(245.0	)
Other comprehensive income (loss)		57.7			(33.1	)		(1.8	)
Balance at end of year	$	(211.9	)	$	(245.0	)	$	(246.8	)

Defined benefit pension plans:
Balance at beginning of year	$	(184.8	)	$	(172.8	)	$	(180.0	)
Other comprehensive income (loss):
Amortization of prior service cost and net losses included in net periodic pension cost		9.8			10.4			9.5
Net actuarial gain (loss) arising during year		2.2			(17.6	)		(31.7	)
Balance at end of year	$	(172.8	)	$	(180.0	)	$	(202.2	)

OPEB plans:
Balance at beginning of year	$	1.8		$	1.2		$	.7
Other comprehensive (income) loss:
Amortization of prior service credit and net losses included in net periodic OPEB cost		(.3	)		(.3	)		(.3	)
Net actuarial loss arising during year		(.3	)		(.2	)		(.2	)
Balance at end of year	$	1.2		$	.7		$	.2

Marketable securities:
Balance at beginning of year	$	1.8		$	4.8		$	-
Change in accounting principle		-			(4.8	)		-
Balance at beginning of period, as adjusted		1.8			-			-
Other comprehensive income -
Unrealized gains arising during the year		3.0			-			-
Balance at end of year	$	4.8		$	-		$	-

Interest rate swap:
Balance at beginning of year	$	(2.0	)	$	-		$	-
Other comprehensive income (loss):
Unrealized losses arising during the year		(1.5	)		-			-
Less reclassification adjustment for amounts included in earnings		3.5			-			-
Balance at end of year	$	-		$	-		$	-

Total accumulated other comprehensive loss:
Balance at beginning of year	$	(452.8	)	$	(378.7	)	$	(424.3	)
Change in accounting principle		-			(4.8	)		-
Balance at beginning of period, as adjusted		(452.8	)		(383.5	)		(424.3	)
Other comprehensive income (loss)		74.1			(40.8	)		(24.5	)
Balance at end of year	$	(378.7	)	$	(424.3	)	$	(448.8	)

See Note 6 for further discussion on our marketable securities, Note 10 for amounts related to our defined benefit pension plans, Note 11 for our OPEB plans and Note 16 for discussion on our interest rate swap contract.

Related Party Transactions

12 Months Ended

Dec. 31, 2019

Related Party Transactions

Note 14 – Related party transactions:

We may be deemed to be controlled by Ms. Simmons, Ms. Connelly 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,
	2018		2019
	(In millions)
Current receivables from affiliates:
LPC	$	10.2	$	4.7
Other		2.8		2.2
	$	13.0	$	6.9

Current payables to affiliates:
LPC	$	16.7	$	16.4
Income taxes payable to Valhi		10.4		4.9
	$	27.1	$	21.3

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

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 $157.5 million in 2017, $165.9 million in 2018 and $176.2 million in 2019. Sales of feedstock to LPC were $79.4 million in 2017, $66.9 million in 2018 and $84.1 million in 2019.

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 2017 we entered into an unsecured revolving demand promissory note with Valhi whereby, as amended, we agreed to loan Valhi up to $60 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, 2021. The amount of our outstanding loans to Valhi at any time is at our discretion. At December 31, 2018 and December 31, 2019, we had no outstanding loans to Valhi under this promissory note.

Interest income (including unused commitment fees) on our loan to Valhi was $.4 million in 2017, $.3 million in 2018 and $.5 million in 2019.

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. The net ISA fee charged to us is included in selling, general and administrative expense and corporate expense and was $16.3 million in 2017, $21.1 million in 2018 and $22.8 million in 2019.

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 and EWI RE, Inc., each subsidiaries of Valhi, provide for or broker certain insurance policies for Contran and certain of its subsidiaries and affiliates, including ourselves. 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. Consistent with insurance industry practices, Tall Pines and EWI receive commissions from insurance and reinsurance underwriters and/or assess fees for the policies that they provide or broker. Prior to Valhi’s sale of EWI’s insurance and risk management business to a third party in November 2019, EWI brokered certain of our insurance policies, provided claims and risk management services and, where appropriate, engaged certain third-party risk management consultants. The aggregate premiums paid to Tall Pines and EWI by us and our joint venture were $9.3 million in 2017, $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. These amounts also include payments to insurers or reinsurers 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 that the relationship with Tall Pines will continue in 2020, except that a third-party brokerage and risk management company is now the broker for Contran’s insurance policies and Tall Pines’ reinsurance policies.

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 amongst 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 each of 2017 and 2018 and $.2 million in 2019 for such services. Under the terms of a sublease agreement between Contran and us, we lease certain office space from Contran. In 2019, we paid Contran $.1 million for such rent and related ancillary services. We expect that these relationships with Contran will continue in 2020.

Commitments and Contingencies

12 Months Ended

Dec. 31, 2019

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 recently updated our Kronos Sustainability Report, 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 condition, results of operations or liquidity.

Concentrations of credit risk – Sales of TiO₂ accounted for 94% of our net sales in each of 2017, 2018 and 2019. 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 34% of net sales in 2017, 33% in 2018 and 36% in 2019. We did not have sales to a single customer comprising 10% or more of our net sales in each of 2017 and 2018. One customer accounted for approximately 10% of our net sales in 2019.

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.

	2017		2018		2019
Europe	50	%	44	%	46	%
North America	31	%	37	%	34	%

Long-term contracts – We have long-term supply contracts that provide for certain of our TiO₂ feedstock requirements through 2022. The agreements require us to purchase certain minimum quantities of feedstock with minimum purchase commitments aggregating approximately $897 million over the life of the contracts in years subsequent to December 31, 2019. 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 $74 million at December 31, 2019.

Income taxes – We and Valhi are a party to a tax sharing agreement 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, 2019

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.

Our earnings and cash flows are subject to fluctuations due to changes in currency exchange rates and interest rates. Our risk management policy allows for the use of derivative financial instruments to prudently manage exposure to currency exchange rates and interest rates. Derivatives that we use are primarily currency forward contracts and interest rate swaps. We have not entered into these contracts for trading or speculative purposes in the past, nor do we currently anticipate entering into such contracts for trading or speculative purposes in the future.

Currency forward contracts – Certain of our sales generated by our non-U.S. operations are denominated in U.S. dollars. We periodically use currency forward contracts to manage a very nominal portion of currency exchange rate risk associated with trade receivables denominated in a currency other than the holder’s functional currency or similar exchange rate risk associated with future sales. Derivatives used to hedge forecasted transactions and specific cash flows associated with financial assets and liabilities denominated in currencies other than the U.S. dollar and which meet the criteria for hedge accounting are designated as cash flow hedges. Consequently, the effective portion of gains and losses is deferred as a component of accumulated other comprehensive income and is recognized in earnings at the time the hedged item affects earnings. Contracts that do not meet the criteria for hedge accounting are marked-to-market at each balance sheet date with any resulting gain or loss recognized in income currently as part of net currency transaction gains and losses. The fair value of the currency forward contracts is determined using Level 1 inputs based on the currency spot forward rates quoted by banks or currency dealers.

At December 31, 2018 and 2019, we had no currency forward contracts outstanding. We did not use hedge accounting for any of our contracts to the extent we held such contracts during 2017, 2018 and 2019.

Interest rate swap contract – As part of our interest rate risk management strategy, in August 2015 we entered into a pay-fixed/receive-variable interest rate swap contract with Wells Fargo Bank, N.A. to minimize our exposure to volatility in LIBOR as it related to our forecasted outstanding variable-rate indebtedness. Under this interest rate swap, we paid a fixed rate of 2.016% per annum, payable quarterly, and received a variable rate of three-month LIBOR (subject to a 1.00% floor), also payable quarterly, in each case based on the notional amount of the swap then outstanding. The effective date of the swap contract was September 30, 2015. The notional amount of the swap started at $344.8 million and declined by $875,000 each quarter beginning December 31, 2015, with an original final maturity of the swap contract in February 2020. This swap contract was designated as a cash flow hedge and qualified as an effective hedge at inception under ASC Topic 815 in respect to our term loan indebtedness. The effective portion of changes in fair value on this interest rate swap was recorded as a component of other comprehensive income, net of deferred income taxes. Commencing in the fourth quarter of 2015, as interest expense accrued on LIBOR-based variable rate debt, we classified the amount we paid under the pay-fixed leg of the swap and the amount we received under the receive-variable leg of the swap as part of interest expense (as well as part of the amount we report as cash paid for interest in our Consolidated Statements of Cash Flows), with the net effect that the amount of interest expense we recognized on our LIBOR-based variable rate debt each quarter, as it relates to the notional amount of the swap outstanding each quarter, was based on a fixed rate of 2.016% per annum in lieu of the level of LIBOR prevailing during the quarter.

In September 2017, in connection with the voluntary prepayment and termination of our term loan discussed in Note 8, we voluntarily terminated this swap contract, as we no longer had any exposure to volatility in respect of LIBOR. The cost to us to early terminate the swap contract was $3.3 million, which we paid to Wells Fargo concurrent with the termination. Such $3.3 million expense is classified as part of our loss on prepayment of debt in our Consolidated Statement of Income for the year ended December 31, 2017 and discussed in Note 8. Such $3.3 million amount is also classified as part of the cash paid for interest disclosed in our Consolidated Statement of Cash Flows for the year ended December 31, 2017.

During 2017 (prior to the termination of the interest rate swap contract), a pretax unrealized loss arising during the period of $2.3 million was recognized in other comprehensive loss related to the interest rate swap. During such period, $2.1 million was reclassified from accumulated other comprehensive loss into earnings and is included in interest expense in our Consolidated Statements of Income. From the inception of the swap until the swap contract termination, there had been no gains or losses recognized in earnings representing hedge ineffectiveness with respect to the interest rate swap.

Other – The following table presents the financial instruments that are not carried at fair value but which require fair value disclosure as of December 31, 2018 and 2019.

		December 31, 2018				December 31, 2019
		Carrying amount		Fair value		Carrying amount		Fair value
	(In millions)
Cash, cash equivalents and restricted cash		$	374.7	$	374.7	$	392.3	$	392.3
Long-term debt - Fixed rate Senior Notes			452.4		412.9		442.6		457.0
Common stockholders' equity			839.8		1,335.3		816.1		1,549.7

At December 31, 2019, the estimated market price of our Senior Notes was €1,020 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. The fair value of our common stockholders’ equity is based upon quoted market prices at each balance sheet date, which represent Level 1 inputs. 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, 2019

New Accounting Pronouncements And Changes In Accounting Principles [Abstract]

Recent Accounting Pronouncements

Note 17 – Recent accounting pronouncements:

Adopted

On January 1, 2019, we adopted ASU 2016-02, Leases (Topic 842), which is a comprehensive rewriting of the lease accounting guidance which aims to increase comparability and transparency with regard to lease transactions. The primary change was the recognition of lease assets for the right-of-use of the underlying asset and lease liabilities for the obligation to make payments by lessees on the balance sheet for leases previously classified as operating leases. ASU 2016-02, as amended, also requires increased qualitative disclosure about leases in addition to quantitative disclosures previously required. As permitted, we adopted this ASU prospectively as of January 1, 2019 with no restatement of prior period financial statements. This ASU permits companies to elect certain practical expedients upon adoption, and at adoption we elected the package of practical expedients related to, among other things, lease classification (in which existing leases classified as operating leases under prior GAAP are classified as an operating lease under the new ASU, and existing leases classified as a capital lease under prior GAAP are classified as a finance lease under the new ASU), 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 the new ASU). Upon adoption of this new ASU, at January 1, 2019 we recognized an aggregate right-of-use operating lease asset of $35.1 million and a corresponding aggregate operating lease liability of $34.5 million (there was no impact to the opening balance of retained earnings at January 1, 2019 as a result of adopting this new ASU). See Notes 1 and 7.

Pending Adoption

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. The amendments in ASU 2019-12 are effective for us beginning in the first quarter of 2021, with early adoption permitted. We expect to adopt this ASU in the first quarter of 2020 and we do not expect the adoption to have a material effect on our Consolidated Financial Statements.

Quarterly Results of Operations

12 Months Ended

Dec. 31, 2019

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, 2018
Net sales	$	430.4	$	471.8	$	410.3	$	349.4
Gross margin		174.8		171.8		119.1		96.5
Net income		70.7		77.7		32.6		24.0
Basic and diluted income per share	$	.61	$	.67	$	.28	$	.21

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

We recognized the following amounts during 2018:

•

current cash income tax expense of $3.7 million in the fourth quarter of 2018 related to GILTI (see Note 12), and

•

non-cash income tax expense of $1.4 million and $.7 million in the first and fourth quarters, respectively, related to an increase in our reserve for uncertain tax positions (see Note 12).

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.

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, 2019

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

Derivatives and Hedging Activities

We periodically use currency forward contracts to manage a very nominal portion of currency exchange rate risk associated with trade receivables denominated in a currency other than the holder’s functional currency or similar exchange rate risk associated with future sales. Derivatives used to hedge forecasted transactions and specific cash flows associated with financial assets and liabilities denominated in currencies other than the U.S. dollar and which meet the criteria for hedge accounting are designated as cash flow hedges. Consequently, the effective portion of gains and losses is deferred as a component of accumulated other comprehensive income and is recognized in earnings at the time the hedged item affects earnings. Contracts that do not meet the criteria for hedge accounting are marked-to-market at each balance sheet date with any resulting gain or loss recognized in income currently as part of net currency transaction gains and losses.

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 $101 million in 2017, $105 million in 2018 and $111 million in 2019.

Research and Development

We expense research and development costs as incurred, and these costs were $18 million in 2017, $16 million in 2018 and $17 million in 2019.

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.

	2017		2018		2019
Europe	50	%	44	%	46	%
North America	31	%	37	%	34	%

Recent Accounting Pronouncements

Adopted

Pending Adoption

Summary of Significant Accounting Policies (Tables)

12 Months Ended

Dec. 31, 2019

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, 2019

Segments Geographical Areas [Abstract]

Net Sales and Property and Equipment by Geographical Information

	Years ended December 31,
	2017			2018			2019
	(In millions)
Net sales - point of origin:
United States	$	841.8		$	839.4		$	998.5
Germany		918.6			886.1			883.6
Canada		309.2			307.2			328.7
Belgium		279.9			272.2			270.7
Norway		216.4			209.6			192.2
Eliminations		(836.9	)		(852.6	)		(942.6	)
Total	$	1,729.0		$	1,661.9		$	1,731.1

Net sales - point of destination:
Europe	$	898.8		$	817.2		$	823.5
North America		519.4			542.0			575.6
Other		310.8			302.7			332.0
Total	$	1,729.0		$	1,661.9		$	1,731.1

	December 31,
	2018		2019
	(In millions)
Identifiable assets - net property and equipment:
Germany	$	232.1	$	221.9
Belgium		94.8		95.3
Norway		79.3		86.3
Canada		65.2		72.3
Other		15.0		14.8
Total	$	486.4	$	490.6

Accounts and Other Receivables, Net (Tables)

12 Months Ended

Dec. 31, 2019

Receivables [Abstract]

Accounts and Other Receivables, Net

	December 31,
	2018			2019
	(In millions)
Trade receivables	$	273.3		$	270.5
Recoverable VAT and other receivables		23.8			25.4
Refundable income taxes		3.6			7.7
Allowance for doubtful accounts		(1.2	)		(1.1	)
Total	$	299.5		$	302.5

Inventories, Net (Tables)

12 Months Ended

Dec. 31, 2019

Inventory Disclosure [Abstract]

Schedule of Inventories, Net

	December 31,
	2018		2019
	(In millions)
Raw materials	$	93.1	$	124.4
Work in process		23.5		39.0
Finished products		316.8		269.9
Supplies		64.5		69.7
Total	$	497.9	$	503.0

Investment in TiO2 Manufacturing Joint Venture (Tables)

12 Months Ended

Dec. 31, 2019

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,
	2017			2018			2019
	(In millions)
Distributions from LPC	$	44.0		$	34.3		$	40.6
Contributions to LPC		(50.0	)		(30.3	)		(49.9	)
Net distributions (contributions)	$	(6.0	)	$	4.0		$	(9.3	)

Summary balance sheets of LPC are shown below:

	December 31,
	2018		2019
	(In millions)
ASSETS
Current assets	$	87.0	$	94.6
Property and equipment, net		119.6		121.3
Total assets	$	206.6	$	215.9

LIABILITIES AND PARTNERS' EQUITY
Other liabilities, primarily current	$	41.1	$	32.8
Partners' equity		165.5		183.1
Total liabilities and partners' equity	$	206.6	$	215.9

Summary income statements of LPC are shown below:

	Years ended December 31,
	2017		2018		2019
	(In millions)
Revenues and other income:
Kronos	$	157.5	$	165.9	$	176.2
Venator Investments		158.3		167.0		177.0
Total revenues and other income		315.8		332.9		353.2

Cost and expenses:
Cost of sales		315.4		332.5		352.8
General and administrative		.4		.4		.4
Total costs and expenses		315.8		332.9		353.2
Net income	$	-	$	-	$	-

Marketable Securities (Tables)

12 Months Ended

Dec. 31, 2019

Investments Debt And Equity Securities [Abstract]

Classification of Marketable Securities

Marketable security	Fair value measurement level	Market value		Cost basis		Unrealized gain
		(In millions)
December 31, 2018:
Valhi common stock	1	$	3.3	$	3.2	$	.1
NL and CompX common stocks	1		.1		.1		-
Total		$	3.4	$	3.3	$	.1

December 31, 2019:
Valhi common stock	1	$	3.2	$	3.2	$	-
NL and CompX common stocks	1		.1		.1		-
Total		$	3.3	$	3.3	$	-

Leases (Tables)

12 Months Ended

Dec. 31, 2019

Leases [Abstract]

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

At December 31, 2019, maturities of our operating lease liabilities were as follows:

Years ending December 31,	Amount
	(In millions)
2020	$	7.1
2021		6.3
2022		3.6
2023		2.4
2024		1.6
2025 and thereafter		19.4
Total remaining lease payments		40.4
Less imputed interest		12.0
Total lease obligations		28.4
Less current obligations		6.2
Long term lease obligations	$	22.2

At December 31, 2018, future minimum payments under non-cancellable operating leases having an initial or remaining term of more than one year were as follows:

Years ending December 31,	Amount
	(In millions)
2019	$	6.2
2020		5.0
2021		4.2
2022		3.2
2023		2.4
2024 and thereafter		21.5
Long term lease obligations	$	42.5

Long-Term Debt (Tables)

12 Months Ended

Dec. 31, 2019

Debt Disclosure [Abstract]

Components of Long Term Debt

	December 31,
	2018		2019
	(In millions)
Kronos International, Inc. 3.75% Senior Notes	$	452.4	$	442.6
Other		4.2		2.9
Total debt		456.6		445.5
Less current maturities		1.5		1.5
Total long-term debt	$	455.1	$	444.0

Aggregate Maturities of Long-Term Debt and Other

Aggregate maturities and other – Aggregate maturities of debt at December 31, 2019 are presented in the table below.

Years ending December 31,	Amount
	(In millions)
2020	$	1.5
2021		.7
2022		.7
2023		-
2024		-
2025 and thereafter		447.9
Gross maturities		450.8
Less debt issuance costs		5.3
Total	$	445.5

- 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.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.22)
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 835
-SubTopic 30
-Section 45
-Paragraph 1A
-URI http://asc.fasb.org/extlink&oid=114775744&loc=d3e28541-108399

Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 505
-SubTopic 10
-Section 50
-Paragraph 6
-URI http://asc.fasb.org/extlink&oid=109259400&loc=d3e21506-112644

Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 235
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.4-08.(e),(f))
-URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e23780-122690

Reference 5: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 835
-SubTopic 30
-Section 45
-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=114775744&loc=d3e28551-108399

Reference 6: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 505
-SubTopic 10
-Section 50
-Paragraph 7
-URI http://asc.fasb.org/extlink&oid=109259400&loc=d3e21521-112644

Reference 7: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-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
-Paragraph 3
-URI http://asc.fasb.org/extlink&oid=75038535&loc=d3e64711-112823

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, 2019

Payables And Accruals [Abstract]

Components of Accounts Payable and Accrued Liabilities

	December 31,
	2018		2019
	(In millions)
Accounts payable	$	103.2	$	137.2
Accrued sales discounts and rebates		29.7		32.4
Operating lease liabilities		-		6.2
Employee benefits		27.9		21.1
Other		35.0		40.8
Total	$	195.8	$	237.7

Defined Contribution and Defined Benefit Retirement Plans (Tables)

12 Months Ended

Dec. 31, 2019

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,
	2018			2019
	(In millions)
Change in projected benefit obligations (PBO):
Benefit obligations at beginning of the year	$	681.9		$	658.7
Service cost		11.6			12.8
Interest cost		13.5			13.3
Participant contributions		1.6			1.6
Actuarial losses		5.8			81.5
Settlements		-			(1.0	)
Change in currency exchange rates		(33.7	)		(7.2	)
Benefits paid		(22.0	)		(21.5	)
Benefit obligations at end of the year		658.7			738.2

Change in plan assets:
Fair value of plan assets at beginning of the year		433.3			400.3
Actual return on plan assets		(5.6	)		45.1
Employer contributions		16.3			15.3
Participant contributions		1.6			1.6
Settlements		-			(1.0	)
Change in currency exchange rates		(23.3	)		(2.3	)
Benefits paid		(22.0	)		(21.5	)
Fair value of plan assets at end of year		400.3			437.5
Funded status	$	(258.4	)	$	(300.7	)

Amounts recognized in the balance sheet:
Noncurrent pension asset	$	.8		$	3.1
Noncurrent accrued pension costs		(259.2	)		(303.8	)
Total	$	(258.4	)	$	(300.7	)

Amounts recognized in accumulated other comprehensive loss:
Actuarial losses	$	250.3		$	285.3
Prior service cost		1.2			1.0
Total	$	251.5		$	286.3

Accumulated benefit obligations (ABO)	$	633.5		$	712.2

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

	December 31,
	2018			2019
	(In millions)
Change in PBO:
Benefit obligations at beginning of the year	$	18.2		$	16.9
Interest cost		.6			.7
Actuarial losses (gains)		(.9	)		1.8
Benefits paid		(1.0	)		(1.1	)
Benefit obligations at end of the year		16.9			18.3

Change in plan assets:
Fair value of plan assets at beginning of the year		14.1			13.1
Actual return on plan assets		(.8	)		1.7
Employer contributions		.8			.9
Benefits paid		(1.0	)		(1.1	)
Fair value of plan assets at end of year		13.1			14.6
Funded status	$	(3.8	)	$	(3.7	)

Amounts recognized in the balance sheet:
Accrued pension costs:
Current	$	(.1	)	$	(.1	)
Noncurrent		(3.7	)		(3.6	)
Total	$	(3.8	)	$	(3.7	)

Amounts recognized in accumulated other comprehensive loss - actuarial losses	$	11.2		$	11.3

ABO	$	16.9		$	18.3

Components of Net Periodic Benefit Cost (Credit)

	Years ended December 31,
	2017			2018			2019
	(In millions)
Net periodic pension cost (income):
Service cost benefits	$	11.4		$	11.6		$	12.8
Interest cost on PBO		13.2			13.5			13.3
Expected return on plan assets		(9.2	)		(12.0	)		(11.7	)
Recognized actuarial losses		13.0			13.1			12.8
Amortization of prior service cost		.2			.2			.2
Total	$	28.6		$	26.4		$	27.4

	Years ended December 31,
	2017			2018			2019
	(In millions)
Net periodic pension cost (income):
Interest cost on PBO	$	.7		$	.6		$	.7
Expected return on plan assets		(1.0	)		(1.0	)		(.7	)
Recognized actuarial losses		.6			.6			.6
Total	$	.3		$	.2		$	.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,
	2018		2019
	(In millions)
Plans for which the ABO exceeds plan assets:
PBO	$	605.0	$	685.4
ABO		585.0		663.3
Fair value of plan assets		346.3		381.7

Key Actuarial Assumptions Used

	December 31,
Rate	2018			2019
Discount rate		2.1	%		1.4	%
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 2017, 2018 and 2019 are presented in the table below.

	Years ended December 31,
Rate	2017			2018			2019
Discount rate		2.1	%		2.1	%		2.1	%
Increase in future compensation levels		2.6	%		2.6	%		2.6	%
Long-term return on plan assets		2.4	%		2.9	%		2.9	%

	Years ended December 31,
Rate	2017			2018			2019
Discount rate		3.9	%		3.5	%		4.1	%
Long-term return on plan assets		7.5	%		7.5	%		5.5	%

Defined Benefit Pension Plans

Benefit Payments

Years ending December 31,	Amount
	(In millions)
2020	$	23.0
2021		23.7
2022		24.8
2023		24.6
2024		26.6
Next 5 years		151.6

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 2017, 2018 and 2019.

	Years ended December 31,
	2017		2018			2019
	(In millions)
Changes in plan assets and benefit obligations recognized in other comprehensive income (loss):
Current year:
Net actuarial gain (loss)	$	3.5	$	(24.3	)	$	(48.5	)
Amortization of unrecognized:
Net actuarial losses		13.6		13.7			13.4
Prior service cost		.2		.2			.2
Total	$	17.3	$	(10.4	)	$	(34.9	)

Composition of Pension Plan Assets

The composition of our pension plan assets by asset category and fair value level at December 31, 2018 and 2019 is shown in the table below.

	Fair Value Measurements at December 31, 2018
	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	$	241.5	$	-	$	-	$	241.5	$	-
Canada:
Local currency equities		6.5		6.5		-		-		-
Non local currency equities		13.3		13.3		-		-		-
Local currency fixed income		74.1		74.1		-		-		-
Cash and other		.5		.5		-		-		-
Norway:
Local currency equities		1.7		1.7		-		-		-
Non local currency equities		4.3		4.3		-		-		-
Local currency fixed income		20.4		14.9		5.5		-		-
Non local currency fixed income		6.1		6.1		-		-		-
Real estate		4.5		-		-		4.5		-
Cash and other		13.5		12.7		-		.8		-
U.S.
Equities		4.9		1.5		-		-		3.4
Fixed income		6.0		6.0		-		-		-
Cash and other		1.5		1.1		-		-		.4
CMRT		.7		-		-		.7		-
Other		13.9		3.4		-		10.5		-
Total	$	413.4	$	146.1	$	5.5	$	258.0	$	3.8

	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

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,
	2018			2019
	(In millions)
Fair value at beginning of year	$	273.6		$	258.0
Gain (loss) on assets held at end of year		(4.6	)		30.2
Gain on assets sold during the year		-			.1
Assets purchased		14.1			16.0
Assets sold		(14.5	)		(14.9	)
Transfers in		.7			-
Currency exchange rate fluctuations		(11.3	)		(6.3	)
Fair value at end of year	$	258.0		$	283.1

Other Noncurrent Liabilities (Tables)

12 Months Ended

Dec. 31, 2019

Other Liabilities Disclosure [Abstract]

Components of Other Noncurrent Liabilities

	December 31,
	2018		2019
	(In millions)
Accrued postretirement benefits	$	7.4	$	8.0
Employee benefits		7.3		6.0
Other		14.1		14.2
Total	$	28.8	$	28.2

Income Taxes (Tables)

12 Months Ended

Dec. 31, 2019

Income Tax Disclosure [Abstract]

Components of Income Taxes and Comprehensive Provision for Income Taxes Allocation

	Years ended December 31,
	2017			2018			2019
	(In millions)
Pre-tax income:
U.S.	$	38.6		$	32.8		$	37.9
Non-U.S.		267.1			261.0			83.2
Total	$	305.7		$	293.8		$	121.1

Expected tax expense, at U.S. federal statutory income tax rate of 35% in 2017 and 21% in 2018 and 2019	$	107.0		$	61.7		$	25.4
Non-U.S. tax rates		(13.2	)		21.0			5.4
Incremental net tax expense (benefit) on earnings and losses of U.S. and non-U.S. companies		(8.4	)		1.3			(4.3	)
Valuation allowance		(205.4	)		-			.7
Transition Tax		76.2			(1.7	)		-
Global intangible low-tax income, net		-			3.7			2.4
Tax rate changes		(.2	)		(.2	)		5.5
Canada - Germany APA		-			(1.4	)		-
Refund of prior tax payments, net		(.3	)		-			(2.1	)
Adjustment to the reserve for uncertain tax positions, net		(8.6	)		2.1			.7
Nondeductible expenses		1.7			1.6			1.4
U.S. state income taxes and other, net		2.4			.7			(1.1	)
Income tax expense (benefit)	$	(48.8	)	$	88.8		$	34.0

Components of income tax expense (benefit):
Current payable:
U.S. federal and state	$	3.0		$	12.0		$	5.5
Non-U.S.		37.5			51.1			21.9
		40.5			63.1			27.4

Noncurrent payable - U.S. federal		70.1			(1.6	)		-

Deferred income taxes (benefit):
U.S. federal and state		(13.7	)		(1.8	)		.8
Non-U.S.		(145.7	)		29.1			5.8
		(159.4	)		27.3			6.6
Income tax expense (benefit)	$	(48.8	)	$	88.8		$	34.0

Comprehensive provision for income taxes (benefit) allocable to:
Net income	$	(48.8	)	$	88.8		$	34.0
Other comprehensive income (loss):
Currency translation		19.8			-			-
Pension plans		5.6			(3.6	)		(13.7	)
OPEB plans		(.2	)		(.2	)		(.2	)
Marketable securities		1.6			-			-
Interest rate swap		1.1			-			-
Total	$	(20.9	)	$	85.0		$	20.1

Components of Net Deferred Income Taxes

The components of our net deferred income taxes at December 31, 2018 and 2019 are summarized in the following table.

	December 31,
	2018						2019
	Assets			Liabilities			Assets			Liabilities
	(In millions)
Tax effect of temporary differences related to:
Inventories	$	4.3		$	(3.1	)	$	5.8		$	(2.3	)
Property and equipment		-			(56.9	)		5.9			(57.7	)
Accrued OPEB costs		2.1			-			2.2			-
Accrued pension costs		73.7			-			79.8			-
Other accrued liabilities and deductible differences		10.4			-			9.3			-
Other taxable differences		-			(2.4	)		-			(1.7	)
Tax on unremitted earnings of non-U.S. subsidiaries		-			(11.3	)		-			(10.8	)
Tax loss and tax credit carryforwards		86.6			-			80.0			-
Valuation allowance		(2.9	)		-			(3.5	)		-
Adjusted gross deferred tax assets (liabilities)		174.2			(73.7	)		179.5			(72.5	)
Netting by tax jurisdiction		(52.2	)		52.2			(51.8	)		51.8
Net noncurrent deferred tax asset (liability)	$	122.0		$	(21.5	)	$	127.7		$	(20.7	)

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 2017, 2018 and 2019:

	Years ended December 31,
	2017			2018			2019
	(In millions)
Changes in unrecognized tax benefits:
Unrecognized tax benefits at beginning of year	$	9.9		$	2.1		$	4.1
Net increase (decrease):
Tax positions taken in prior periods		(6.3	)		1.4			(.8	)
Tax positions taken in current period		.2			.7			.7
Lapse due to applicable statute of limitations		(.1	)		-			-
Settlements with taxing authorities		(2.3	)		-			-
Change in currency exchange rates		.7			(.1	)		(.1	)
Unrecognized tax benefits at end of year	$	2.1		$	4.1		$	3.9

Stockholders' equity (Tables)

12 Months Ended

Dec. 31, 2019

Equity [Abstract]

Schedule of Changes in Accumulated Other Comprehensive Loss

Accumulated other comprehensive loss – Changes in accumulated other comprehensive loss for 2017, 2018 and 2019 are presented in the table below.

	Years ended December 31,
	2017			2018			2019
	(In millions)
Accumulated other comprehensive loss, net of tax:
Currency translation:
Balance at beginning of year	$	(269.6	)	$	(211.9	)	$	(245.0	)
Other comprehensive income (loss)		57.7			(33.1	)		(1.8	)
Balance at end of year	$	(211.9	)	$	(245.0	)	$	(246.8	)

Defined benefit pension plans:
Balance at beginning of year	$	(184.8	)	$	(172.8	)	$	(180.0	)
Other comprehensive income (loss):
Amortization of prior service cost and net losses included in net periodic pension cost		9.8			10.4			9.5
Net actuarial gain (loss) arising during year		2.2			(17.6	)		(31.7	)
Balance at end of year	$	(172.8	)	$	(180.0	)	$	(202.2	)

OPEB plans:
Balance at beginning of year	$	1.8		$	1.2		$	.7
Other comprehensive (income) loss:
Amortization of prior service credit and net losses included in net periodic OPEB cost		(.3	)		(.3	)		(.3	)
Net actuarial loss arising during year		(.3	)		(.2	)		(.2	)
Balance at end of year	$	1.2		$	.7		$	.2

Marketable securities:
Balance at beginning of year	$	1.8		$	4.8		$	-
Change in accounting principle		-			(4.8	)		-
Balance at beginning of period, as adjusted		1.8			-			-
Other comprehensive income -
Unrealized gains arising during the year		3.0			-			-
Balance at end of year	$	4.8		$	-		$	-

Interest rate swap:
Balance at beginning of year	$	(2.0	)	$	-		$	-
Other comprehensive income (loss):
Unrealized losses arising during the year		(1.5	)		-			-
Less reclassification adjustment for amounts included in earnings		3.5			-			-
Balance at end of year	$	-		$	-		$	-

Total accumulated other comprehensive loss:
Balance at beginning of year	$	(452.8	)	$	(378.7	)	$	(424.3	)
Change in accounting principle		-			(4.8	)		-
Balance at beginning of period, as adjusted		(452.8	)		(383.5	)		(424.3	)
Other comprehensive income (loss)		74.1			(40.8	)		(24.5	)
Balance at end of year	$	(378.7	)	$	(424.3	)	$	(448.8	)

Related Party Transactions (Tables)

12 Months Ended

Dec. 31, 2019

Summary of Receivables from and Payables to Affiliates

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

	December 31,
	2018		2019
	(In millions)
Current receivables from affiliates:
LPC	$	10.2	$	4.7
Other		2.8		2.2
	$	13.0	$	6.9

Current payables to affiliates:
LPC	$	16.7	$	16.4
Income taxes payable to Valhi		10.4		4.9
	$	27.1	$	21.3

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

Commitments and Contingencies (Tables)

12 Months Ended

Dec. 31, 2019

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.

	2017		2018		2019
Europe	50	%	44	%	46	%
North America	31	%	37	%	34	%

Financial Instruments (Tables)

12 Months Ended

Dec. 31, 2019

Fair Value Disclosures [Abstract]

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

Other – The following table presents the financial instruments that are not carried at fair value but which require fair value disclosure as of December 31, 2018 and 2019.

		December 31, 2018				December 31, 2019
		Carrying amount		Fair value		Carrying amount		Fair value
	(In millions)
Cash, cash equivalents and restricted cash		$	374.7	$	374.7	$	392.3	$	392.3
Long-term debt - Fixed rate Senior Notes			452.4		412.9		442.6		457.0
Common stockholders' equity			839.8		1,335.3		816.1		1,549.7

Quarterly Results of Operations (Tables)

12 Months Ended

Dec. 31, 2019

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, 2018
Net sales	$	430.4	$	471.8	$	410.3	$	349.4
Gross margin		174.8		171.8		119.1		96.5
Net income		70.7		77.7		32.6		24.0
Basic and diluted income per share	$	.61	$	.67	$	.28	$	.21

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

Summary of Significant Accounting Policies - Additional Information (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Organization And Basis Of Presentation [Line Items]
Capitalized interest costs	$ 0.6	$ 0.8	$ 2.0
Income taxes paid, net	35.8	67.9	37.1
Cost of sales	1,344.9	1,099.7	1,159.3
Research and development costs	17.0	16.0	18.0
Shipping and Handling
Organization And Basis Of Presentation [Line Items]
Cost of sales	$ 111.0	105.0	101.0
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	$ 10.7		$ 16.8
Income taxes refunds, net		$ 1.9
Valhi Inc \| Kronos Worldwide, Inc.
Organization And Basis Of Presentation [Line Items]
Ownership percentage in subsidiary	50.00%
Valhi Inc \| NL Industries Inc.
Organization And Basis Of Presentation [Line Items]
Ownership percentage in company	83.00%
NL Industries Inc. \| Kronos Worldwide, Inc.
Organization And Basis Of Presentation [Line Items]
Ownership percentage	30.00%
Contran
Organization And Basis Of Presentation [Line Items]
Controlling interest description	Consequently, at December 31, 2019, Ms. Simmons, Ms. Connelly 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, 2019
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, 2019	Dec. 31, 2018
Non-U.S. Subsidiaries
Geographic Information [Line Items]
Net assets of non-US subsidiaries	$ 313	$ 384

Geographic Information - Net Sales and Property and Equipment by Geographical Information (Detail) - USD ($) $ in Millions	3 Months Ended								12 Months Ended
	Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Revenues From External Customers And Long Lived Assets [Line Items]
Net sales	$ 372.7	$ 437.4	$ 484.5	$ 436.5	$ 349.4	$ 410.3	$ 471.8	$ 430.4	$ 1,731.1	$ 1,661.9	$ 1,729.0
Net property and equipment	490.6				486.4				490.6	486.4
Germany
Revenues From External Customers And Long Lived Assets [Line Items]
Net property and equipment	221.9				232.1				221.9	232.1
Canada
Revenues From External Customers And Long Lived Assets [Line Items]
Net property and equipment	72.3				65.2				72.3	65.2
Belgium
Revenues From External Customers And Long Lived Assets [Line Items]
Net property and equipment	95.3				94.8				95.3	94.8
Norway
Revenues From External Customers And Long Lived Assets [Line Items]
Net property and equipment	86.3				79.3				86.3	79.3
Other
Revenues From External Customers And Long Lived Assets [Line Items]
Net property and equipment	$ 14.8				$ 15.0				14.8	15.0
Point of origin \| Reportable Geographical Components \| Germany
Revenues From External Customers And Long Lived Assets [Line Items]
Net sales									883.6	886.1	918.6
Point of origin \| Reportable Geographical Components \| United States
Revenues From External Customers And Long Lived Assets [Line Items]
Net sales									998.5	839.4	841.8
Point of origin \| Reportable Geographical Components \| Canada
Revenues From External Customers And Long Lived Assets [Line Items]
Net sales									328.7	307.2	309.2
Point of origin \| Reportable Geographical Components \| Belgium
Revenues From External Customers And Long Lived Assets [Line Items]
Net sales									270.7	272.2	279.9
Point of origin \| Reportable Geographical Components \| Norway
Revenues From External Customers And Long Lived Assets [Line Items]
Net sales									192.2	209.6	216.4
Point of origin \| Eliminations
Revenues From External Customers And Long Lived Assets [Line Items]
Net sales									(942.6)	(852.6)	(836.9)
Point of destination \| Europe
Revenues From External Customers And Long Lived Assets [Line Items]
Net sales									823.5	817.2	898.8
Point of destination \| North America
Revenues From External Customers And Long Lived Assets [Line Items]
Net sales									575.6	542.0	519.4
Point of destination \| Other
Revenues From External Customers And Long Lived Assets [Line Items]
Net sales									$ 332.0	$ 302.7	$ 310.8

Accounts and Other Receivables, Net - Accounts and Other Receivables, Net (Detail) - USD ($) $ in Millions	Dec. 31, 2019	Dec. 31, 2018
Accounts Notes And Loans Receivable [Line Items]
Allowance for doubtful accounts	$ (1.1)	$ (1.2)
Total	302.5	299.5
Trade receivables
Accounts Notes And Loans Receivable [Line Items]
Accounts and other receivables	270.5	273.3
Recoverable VAT and other receivables
Accounts Notes And Loans Receivable [Line Items]
Accounts and other receivables	25.4	23.8
Refundable income taxes
Accounts Notes And Loans Receivable [Line Items]
Refundable income taxes	$ 7.7	$ 3.6

Inventories, Net - Schedule of Inventories, Net (Detail) - USD ($) $ in Millions	Dec. 31, 2019	Dec. 31, 2018
Inventory Disclosure [Abstract]
Raw materials	$ 124.4	$ 93.1
Work in process	39.0	23.5
Finished products	269.9	316.8
Supplies	69.7	64.5
Total	$ 503.0	$ 497.9

Investment in TiO2 Manufacturing Joint Venture - Additional Information (Detail)	12 Months Ended
	Dec. 31, 2019 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, 2019	Dec. 31, 2018	Dec. 31, 2017
Schedule of Equity Method Investments [Line Items]
Net distributions (contributions)	$ (9.3)	$ 4.0	$ (6.0)
Louisiana Pigment Company, L.P.
Schedule of Equity Method Investments [Line Items]
Distributions from LPC	40.6	34.3	44.0
Contributions to LPC	(49.9)	(30.3)	(50.0)
Net distributions (contributions)	$ (9.3)	$ 4.0	$ (6.0)

Investment in TiO2 Manufacturing Joint Venture - Summary of Balance Sheets of LPC (Detail) - Louisiana Pigment Company, L.P. - USD ($) $ in Millions	Dec. 31, 2019	Dec. 31, 2018
ASSETS
Current assets	$ 94.6	$ 87.0
Property and equipment, net	121.3	119.6
Total assets	215.9	206.6
LIABILITIES AND PARTNERS' EQUITY
Other liabilities, primarily current	32.8	41.1
Partners' equity	183.1	165.5
Total liabilities and partners' equity	$ 215.9	$ 206.6

Investment in TiO2 Manufacturing Joint Venture - Summary of Income Statements of LPC (Detail) - Louisiana Pigment Company, L.P. - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Revenues and other income:
Total revenues and other income	$ 353.2	$ 332.9	$ 315.8
Cost and expenses:
Cost of sales	352.8	332.5	315.4
General and administrative	0.4	0.4	0.4
Total costs and expenses	353.2	332.9	315.8
Kronos
Revenues and other income:
Total revenues and other income	176.2	165.9	157.5
Venator Investments
Revenues and other income:
Total revenues and other income	$ 177.0	$ 167.0	$ 158.3

Marketable Securities - Classification of Marketable Securities (Detail) - USD ($) $ in Millions	Dec. 31, 2019	Dec. 31, 2018
Marketable Securities [Line Items]
Market value	$ 3.3	$ 3.4
Cost basis	3.3	3.3
Unrealized gain		0.1
Level 1 \| Common stock \| Valhi
Marketable Securities [Line Items]
Market value	3.2	3.3
Cost basis	3.2	3.2
Unrealized gain		0.1
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	Dec. 31, 2019	Dec. 31, 2018
Marketable Securities [Line Items]
Investments in publicly-traded shares	1.7	1.7
Quoted market price of per share	$ 1.93	$ 1.87

Leases - Additional Information (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Lessee Lease Description [Line Items]
Operating lease payment	$ 8.2
Operating lease, expense	8.2
Operating lease right-of-use assets	29.0
Operating lease, liability	$ 28.4
Operating lease, weighted average remaining lease term	14 years
Operating lease, weighted average discount rate	4.60%
Aggregate future minimum rental commitments	$ 40.4	$ 42.5
New Operating Leases
Lessee Lease Description [Line Items]
Operating lease right-of-use assets	1.6
Operating lease, liability	$ 1.6
Non-cancellable Operating Leases
Lessee Lease Description [Line Items]
Operating lease, expense		15.0	$ 16.0	$ 14.0
Aggregate future minimum rental commitments		42.5
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	$ 7.0
Leverkusen Facility Land Lease \| Non-cancellable Operating Leases
Lessee Lease Description [Line Items]
Aggregate future minimum rental commitments		$ 17.0

Leases - Schedule of Future Minimum Payment under Non-Cancellable Operating Lease Liabilities (Detail) - USD ($) $ in Millions	Dec. 31, 2019	Dec. 31, 2018
Leases [Abstract]
2020	$ 7.1	$ 6.2
2021	6.3	5.0
2022	3.6	4.2
2023	2.4	3.2
2024	1.6	2.4
2025 and thereafter	19.4	21.5
Total remaining lease payments	40.4	$ 42.5
Less imputed interest	12.0
Total lease obligations	28.4
Less current obligations	6.2
Operating lease liabilities	$ 22.2

Long-Term Debt - Components of Long-Term Debt (Detail) - USD ($) $ in Millions	Dec. 31, 2019	Dec. 31, 2018
Debt Instrument [Line Items]
Kronos International, Inc. 3.75% Senior Notes	$ 442.6	$ 452.4
Other	2.9	4.2
Total debt	445.5	456.6
Less current maturities	1.5	1.5
Total long-term debt	444.0	455.1
Kronos International, Inc \| 3.75% Senior Notes
Debt Instrument [Line Items]
Kronos International, Inc. 3.75% Senior Notes	$ 442.6	$ 452.4

Long-Term Debt - Senior Notes - Additional Information (Detail) € in Millions, $ in Millions		12 Months Ended
	Sep. 13, 2017 USD ($)	Dec. 31, 2019 USD ($)	Dec. 31, 2018 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		$ 5.3	$ 6.3
North American Revolving Credit Facility
Debt Instrument [Line Items]
Repayments of line of credit using Senior Notes proceeds	21.0
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 may 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). 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 may 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. 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%
Kronos International, Inc \| 3.75% Senior Secured Notes due September 15, 2025 \| Term Loan
Debt Instrument [Line Items]
Repayments of debt	$ 338.6

Long-Term Debt - Term Loan - Additional Information (Detail) - USD ($) $ in Millions	1 Months Ended	3 Months Ended	6 Months Ended	12 Months Ended
	Sep. 30, 2017	Sep. 30, 2017	Jun. 30, 2017	Dec. 31, 2019	Dec. 31, 2017
Debt Instrument [Line Items]
Loss on prepayment of debt, net					$ 7.1
Term Loan
Debt Instrument [Line Items]
Termination of interest rate swap contract	$ 3.3
Term Loan \| 2014 Term Loan, Amended in May 2015
Debt Instrument [Line Items]
Quarterly principal payments			$ 1.8
Repayments of debt	$ 338.6
Debt instrument, voluntary repayment period				2017-09
Loss on prepayment of debt, net		$ 7.1
Write-off of unamortized debt issuance costs		2.7
Write-off of unamortized original issue discount		0.7
Termination of interest rate swap contract		$ 3.3

Long-Term Debt - Revolving Credit Facilities - Additional Information (Detail)	1 Months Ended		12 Months Ended
	Sep. 30, 2017	Jan. 31, 2017	Dec. 31, 2019 USD ($)	Dec. 31, 2018 USD ($)	Dec. 31, 2019 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			100,800,000		€ 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			$ 104,800,000
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, 2019 USD ($)
Long Term Debt By Maturity [Abstract]
2020	$ 1.5
2021	0.7
2022	0.7
2025 and thereafter	447.9
Gross maturities	450.8
Less debt issuance costs	5.3
Total	$ 445.5

Accounts Payable and Accrued Liabilities - Components of Accounts Payable and Accrued Liabilities (Detail) - USD ($) $ in Millions	Dec. 31, 2019	Dec. 31, 2018
Payables And Accruals [Abstract]
Accounts payable	$ 137.2	$ 103.2
Accrued sales discounts and rebates	32.4	29.7
Operating lease liabilities	6.2
Employee benefits	21.1	27.9
Other	40.8	35.0
Total	$ 237.7	$ 195.8

Defined Contribution and Defined Benefit Retirement Plans - Additional Information (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Defined Benefit Plan Disclosure [Line Items]
Defined contribution benefit plan expense	$ 3.1	$ 3.3	$ 2.7
Defined Benefit Pension Plans
Defined Benefit Plan Disclosure [Line Items]
Expected contributions next fiscal year	17.0
Unrecognized actuarial losses to be recognized in next fiscal year	17.7
Unrecognized prior service cost to be recognized in next fiscal year	$ 0.2
Defined Benefit Pension Plans \| United States Pension Plans of US Entity, Defined Benefit
Defined Benefit Plan Disclosure [Line Items]
Discount rate	3.10%	4.10%
Expected long-term rate of return	5.50%	7.50%	7.50%
Defined Benefit Pension Plans \| Foreign Pension Plans Defined Benefit
Defined Benefit Plan Disclosure [Line Items]
Discount rate	1.40%	2.10%
Expected long-term rate of return	2.90%	2.90%	2.40%
Defined Benefit Pension Plans \| CMRT \| United States Pension Plans of US Entity, Defined Benefit
Defined Benefit Plan Disclosure [Line Items]
Expected long-term rate of return		7.50%	7.50%
Defined Benefit Pension Plans \| Equity Securities \| United States Pension Plans of US Entity, Defined Benefit
Defined Benefit Plan Disclosure [Line Items]
Expected long-term rate of return	9.00%
Target asset allocation	36.00%
Defined Benefit Pension Plans \| Equity Securities \| Canada \| Minimum
Defined Benefit Plan Disclosure [Line Items]
Target asset allocation	20.00%
Defined Benefit Pension Plans \| Equity Securities \| Canada \| Maximum
Defined Benefit Plan Disclosure [Line Items]
Target asset allocation	30.00%
Defined Benefit Pension Plans \| Equity Securities \| Norway
Defined Benefit Plan Disclosure [Line Items]
Expected long-term rate of return	7.00%
Target asset allocation	11.00%
Defined Benefit Pension Plans \| Debt Securities \| United States Pension Plans of US Entity, Defined Benefit
Defined Benefit Plan Disclosure [Line Items]
Expected long-term rate of return	4.00%
Target asset allocation	49.00%
Defined Benefit Pension Plans \| Debt Securities \| Canada \| Minimum
Defined Benefit Plan Disclosure [Line Items]
Target asset allocation	70.00%
Defined Benefit Pension Plans \| Debt Securities \| Canada \| Maximum
Defined Benefit Plan Disclosure [Line Items]
Target asset allocation	80.00%
Defined Benefit Pension Plans \| Debt Securities \| Norway
Defined Benefit Plan Disclosure [Line Items]
Expected long-term rate of return	3.00%
Target asset allocation	67.00%
Defined Benefit Pension Plans \| Multy-asset Strategies and CMRT \| United States Pension Plans of US Entity, Defined Benefit
Defined Benefit Plan Disclosure [Line Items]
Expected long-term rate of return	3.00%
Defined Benefit Pension Plans \| Assets valued at NAV \| United States Pension Plans of US Entity, Defined Benefit
Defined Benefit Plan Disclosure [Line Items]
Target asset allocation	30.00%
Defined Benefit Pension Plans \| Real Estate \| Norway
Defined Benefit Plan Disclosure [Line Items]
Expected long-term rate of return	5.00%
Target asset allocation	12.00%
Defined Benefit Pension Plans \| Other Investment Securities And Cash \| Norway
Defined Benefit Plan Disclosure [Line Items]
Expected long-term rate of return	8.00%
Defined Benefit Pension Plans \| Real Estate And Other Investments \| Norway
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, 2019 USD ($)
Defined Benefit Plan Disclosure [Line Items]
2020	$ 23.0
2021	23.7
2022	24.8
2023	24.6
2024	26.6
Next 5 years	$ 151.6

Defined Contribution and Defined Benefit Retirement Plans - Funded Status of Defined Benefit Pension Plans (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Amounts recognized in the balance sheet:
Accrued pension costs, noncurrent	$ (307.4)	$ (262.9)
Defined Benefit Pension Plans
Change in plan assets:
Fair value of plan assets at beginning of the year	413.4
Fair value of plan assets at end of year	452.1	413.4
United States \| Defined Benefit Pension Plans
Change in projected benefit obligations (PBO):
Benefit obligations at beginning of the year	16.9	18.2
Interest cost	0.7	0.6	$ 0.7
Actuarial losses (gains)	1.8	(0.9)
Benefits paid	(1.1)	(1.0)
Benefit obligations at end of the year	18.3	16.9	18.2
Change in plan assets:
Fair value of plan assets at beginning of the year	13.1	14.1
Actual return (loss) on plan assets	1.7	(0.8)
Employer contributions	0.9	0.8
Benefits paid	(1.1)	(1.0)
Fair value of plan assets at end of year	14.6	13.1	14.1
Funded status	(3.7)	(3.8)
Amounts recognized in the balance sheet:
Accrued pension costs, current	(0.1)	(0.1)
Accrued pension costs, noncurrent	(3.6)	(3.7)
Total	(3.7)	(3.8)
Amount recognized in accumulated other comprehensive loss, Actuarial losses	11.3	11.2
Accumulated benefit obligations (ABO)	18.3	16.9
Actual return (loss) on plan assets	1.7	(0.8)
Foreign Pension Plans Defined Benefit \| Defined Benefit Pension Plans
Change in projected benefit obligations (PBO):
Benefit obligations at beginning of the year	658.7	681.9
Service cost	12.8	11.6	11.4
Interest cost	13.3	13.5	13.2
Participant contributions	1.6	1.6
Actuarial losses (gains)	81.5	5.8
Settlements	(1.0)
Change in currency exchange rates	(7.2)	(33.7)
Benefits paid	(21.5)	(22.0)
Benefit obligations at end of the year	738.2	658.7	681.9
Change in plan assets:
Fair value of plan assets at beginning of the year	400.3	433.3
Actual return (loss) on plan assets	45.1	(5.6)
Employer contributions	15.3	16.3
Participant contributions	1.6	1.6
Settlements	(1.0)
Change in currency exchange rates	(2.3)	(23.3)
Benefits paid	(21.5)	(22.0)
Fair value of plan assets at end of year	437.5	400.3	$ 433.3
Funded status	(300.7)	(258.4)
Amounts recognized in the balance sheet:
Noncurrent pension asset	3.1	0.8
Accrued pension costs, noncurrent	(303.8)	(259.2)
Total	(300.7)	(258.4)
Amount recognized in accumulated other comprehensive loss, Actuarial losses	285.3	250.3
Amount recognized in accumulated other comprehensive loss, Prior service cost	1.0	1.2
Amount recognized in accumulated other comprehensive loss, Total	286.3	251.5
Accumulated benefit obligations (ABO)	712.2	633.5
Actual return (loss) on plan assets	$ 45.1	$ (5.6)

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, 2019	Dec. 31, 2018	Dec. 31, 2017
Foreign Pension Plans Defined Benefit
Defined Benefit Plan Disclosure [Line Items]
Service cost	$ 12.8	$ 11.6	$ 11.4
Interest cost	13.3	13.5	13.2
Expected return on plan assets	(11.7)	(12.0)	(9.2)
Recognized actuarial losses	12.8	13.1	13.0
Amortization of prior service cost	0.2	0.2	0.2
Total	27.4	26.4	28.6
United States
Defined Benefit Plan Disclosure [Line Items]
Interest cost	0.7	0.6	0.7
Expected return on plan assets	(0.7)	(1.0)	(1.0)
Recognized actuarial losses	0.6	0.6	0.6
Total	$ 0.6	$ 0.2	$ 0.3

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, 2019	Dec. 31, 2018
Defined Benefit Plan Disclosure [Line Items]
Projected Benefit Obligation (PBO)	$ 685.4	$ 605.0
Accumulated Benefit Obligation (ABO)	663.3	585.0
Fair value of plan assets	$ 381.7	$ 346.3

Defined Contribution and Defined Benefit Retirement Plans - Schedule of Assumptions Used (Detail) - Foreign Pension Plans Defined Benefit - Defined Benefit Pension Plans	Dec. 31, 2019	Dec. 31, 2018
Defined Benefit Plan Disclosure [Line Items]
Discount rate	1.40%	2.10%
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, 2019	Dec. 31, 2018	Dec. 31, 2017
Foreign Pension Plans Defined Benefit
Defined Benefit Plan Disclosure [Line Items]
Discount rate	2.10%	2.10%	2.10%
Increase in future compensation levels	2.60%	2.60%	2.60%
Long-term return on plan assets	2.90%	2.90%	2.40%
United States
Defined Benefit Plan Disclosure [Line Items]
Discount rate	4.10%	3.50%	3.90%
Long-term return on plan assets	5.50%	7.50%	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, 2019	Dec. 31, 2018	Dec. 31, 2017
Defined Benefit Plan Disclosure [Line Items]
Net actuarial gain (loss)	$ (48.5)	$ (24.3)	$ 3.5
Net actuarial losses	13.4	13.7	13.6
Prior service cost	0.2	0.2	0.2
Total	$ (34.9)	$ (10.4)	$ 17.3

Defined Contribution and Defined Benefit Retirement Plans- Composition of Pension Plan Assets (Detail) - Defined Benefit Pension Plans - USD ($) $ in Millions	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Defined Benefit Plan Disclosure [Line Items]
Pension plan assets	$ 452.1	$ 413.4
Foreign Pension Plans Defined Benefit
Defined Benefit Plan Disclosure [Line Items]
Pension plan assets	437.5	400.3	$ 433.3
Germany
Defined Benefit Plan Disclosure [Line Items]
Pension plan assets	264.5	241.5
Other
Defined Benefit Plan Disclosure [Line Items]
Pension plan assets	15.2	13.9
United States
Defined Benefit Plan Disclosure [Line Items]
Pension plan assets	14.6	13.1	$ 14.1
Level 1
Defined Benefit Plan Disclosure [Line Items]
Pension plan assets	155.9	146.1
Level 1 \| Other
Defined Benefit Plan Disclosure [Line Items]
Pension plan assets	4.2	3.4
Level 2
Defined Benefit Plan Disclosure [Line Items]
Pension plan assets	8.7	5.5
Level 3
Defined Benefit Plan Disclosure [Line Items]
Pension plan assets	283.1	258.0
Level 3 \| Germany
Defined Benefit Plan Disclosure [Line Items]
Pension plan assets	264.5	241.5
Level 3 \| Other
Defined Benefit Plan Disclosure [Line Items]
Pension plan assets	11.0	10.5
Assets Measured at NAV
Defined Benefit Plan Disclosure [Line Items]
Pension plan assets	4.4	3.8
Local Currency Equities Member \| Norway
Defined Benefit Plan Disclosure [Line Items]
Pension plan assets	1.6	1.7
Local Currency Equities Member \| Canada
Defined Benefit Plan Disclosure [Line Items]
Pension plan assets	8.3	6.5
Local Currency Equities Member \| Level 1 \| Norway
Defined Benefit Plan Disclosure [Line Items]
Pension plan assets	1.6	1.7
Local Currency Equities Member \| Level 1 \| Canada
Defined Benefit Plan Disclosure [Line Items]
Pension plan assets	8.3	6.5
Non Local Currency Equities \| Norway
Defined Benefit Plan Disclosure [Line Items]
Pension plan assets	4.2	4.3
Non Local Currency Equities \| Canada
Defined Benefit Plan Disclosure [Line Items]
Pension plan assets	16.3	13.3
Non Local Currency Equities \| Level 1 \| Norway
Defined Benefit Plan Disclosure [Line Items]
Pension plan assets	4.2	4.3
Non Local Currency Equities \| Level 1 \| Canada
Defined Benefit Plan Disclosure [Line Items]
Pension plan assets	16.3	13.3
Local Currency Fixed Income \| Norway
Defined Benefit Plan Disclosure [Line Items]
Pension plan assets	22.8	20.4
Local Currency Fixed Income \| Canada
Defined Benefit Plan Disclosure [Line Items]
Pension plan assets	80.9	74.1
Local Currency Fixed Income \| Level 1 \| Norway
Defined Benefit Plan Disclosure [Line Items]
Pension plan assets	14.1	14.9
Local Currency Fixed Income \| Level 1 \| Canada
Defined Benefit Plan Disclosure [Line Items]
Pension plan assets	80.9	74.1
Local Currency Fixed Income \| Level 2 \| Norway
Defined Benefit Plan Disclosure [Line Items]
Pension plan assets	8.7	5.5
Cash And Other \| Norway
Defined Benefit Plan Disclosure [Line Items]
Pension plan assets	8.2	13.5
Cash And Other \| Canada
Defined Benefit Plan Disclosure [Line Items]
Pension plan assets	0.6	0.5
Cash And Other \| United States
Defined Benefit Plan Disclosure [Line Items]
Pension plan assets	1.8	1.5
Cash And Other \| Level 1 \| Norway
Defined Benefit Plan Disclosure [Line Items]
Pension plan assets	7.4	12.7
Cash And Other \| Level 1 \| Canada
Defined Benefit Plan Disclosure [Line Items]
Pension plan assets	0.6	0.5
Cash And Other \| Level 1 \| United States
Defined Benefit Plan Disclosure [Line Items]
Pension plan assets	1.4	1.1
Cash And Other \| Level 3 \| Norway
Defined Benefit Plan Disclosure [Line Items]
Pension plan assets	0.8	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	8.3	6.1
Non Local Currency Fixed Income \| Level 1 \| Norway
Defined Benefit Plan Disclosure [Line Items]
Pension plan assets	8.3	6.1
Real Estate \| Norway
Defined Benefit Plan Disclosure [Line Items]
Pension plan assets	6.6	4.5
Real Estate \| Level 3 \| Norway
Defined Benefit Plan Disclosure [Line Items]
Pension plan assets	6.6	4.5
Equity \| United States
Defined Benefit Plan Disclosure [Line Items]
Pension plan assets	5.8	4.9
Equity \| Level 1 \| United States
Defined Benefit Plan Disclosure [Line Items]
Pension plan assets	1.6	1.5
Equity \| Level 3 \| United States
Defined Benefit Plan Disclosure [Line Items]
Pension plan assets	0.2
Equity \| Assets Measured at NAV \| United States
Defined Benefit Plan Disclosure [Line Items]
Pension plan assets	4.0	3.4
CMRT \| United States
Defined Benefit Plan Disclosure [Line Items]
Pension plan assets		0.7
CMRT \| Level 3 \| United States
Defined Benefit Plan Disclosure [Line Items]
Pension plan assets		0.7
Fixed Income \| United States
Defined Benefit Plan Disclosure [Line Items]
Pension plan assets	7.0	6.0
Fixed Income \| Level 1 \| United States
Defined Benefit Plan Disclosure [Line Items]
Pension plan assets	$ 7.0	$ 6.0

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, 2019	Dec. 31, 2018
Fair Value Assets Measured On Recurring Basis Unobservable Input Reconciliation [Line Items]
Fair value at beginning of year	$ 258.0	$ 273.6
Gain (loss) on assets held at end of year	30.2	(4.6)
Gain on assets sold during the year	0.1
Assets purchased	16.0	14.1
Assets sold	(14.9)	(14.5)
Transfers in		0.7
Currency exchange rate fluctuations	(6.3)	(11.3)
Fair value at end of year	$ 283.1	$ 258.0

Other Noncurrent Liabilities - Components of Other Noncurrent Liabilities (Detail) - USD ($) $ in Millions	Dec. 31, 2019	Dec. 31, 2018
Other Liabilities Noncurrent [Abstract]
Accrued postretirement benefits	$ 8.0	$ 7.4
Employee benefits	6.0	7.3
Other	14.2	14.1
Total	$ 28.2	$ 28.8

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	Mar. 31, 2018	Dec. 31, 2017	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Schedule Of Income Tax [Line Items]
U.S.				$ 37.9	$ 32.8	$ 38.6
Non-U.S.				83.2	261.0	267.1
Income before income taxes				121.1	293.8	305.7
Expected tax expense, at U.S. federal statutory income tax rate of 35% in 2017 and 21% in 2018 and 2019				25.4	61.7	107.0
Non-U.S. tax rates				5.4	21.0	(13.2)
Incremental net tax expense (benefit) on earnings and losses of U.S. and non-U.S. companies				(4.3)	1.3	(8.4)
Valuation allowance				0.7		(205.4)
Transition Tax	$ (1.7)		$ 76.2		(1.7)	76.2
Global intangible low-tax income, net	3.7			2.4	3.7
Tax rate changes				5.5	(0.2)	(0.2)
Refund of prior tax payments, net				(2.1)		(0.3)
Adjustment to the reserve for uncertain tax positions, net	$ 0.7	$ 1.4		0.7	2.1	(8.6)
Nondeductible expenses				1.4	1.6	1.7
U.S. state income taxes and other, net				(1.1)	0.7	2.4
Income tax expense (benefit)				34.0	88.8	(48.8)
Current payable:
U.S. federal and state				5.5	12.0	3.0
Non-U.S.				21.9	51.1	37.5
Total				27.4	63.1	40.5
Noncurrent payable - U.S. federal					(1.6)	70.1
Deferred income taxes (benefit):
U.S. federal and state				0.8	(1.8)	(13.7)
Non-U.S.				5.8	29.1	(145.7)
Total				6.6	27.3	(159.4)
Comprehensive provision for income taxes (benefit) allocable to:
Net income				34.0	88.8	(48.8)
Other comprehensive income (loss):
Currency translation						19.8
Marketable securities						1.6
Interest rate swap						1.1
Total				20.1	85.0	(20.9)
Defined Benefit Pension Plans
Other comprehensive income (loss):
Benefit plans				(13.7)	(3.6)	5.6
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, 2019	Dec. 31, 2018	Dec. 31, 2017
Income Tax Disclosure [Abstract]
U.S. Federal statutory income tax rate	21.00%	21.00%	35.00%

Income Taxes - Components of Net Deferred Income Taxes (Detail) - USD ($) $ in Millions	Dec. 31, 2019	Dec. 31, 2018
Income Tax Disclosure [Abstract]
Inventories, Assets	$ 5.8	$ 4.3
Property and equipment, Assets	5.9
Accrued OPEB costs, Assets	2.2	2.1
Accrued pension costs, Assets	79.8	73.7
Other accrued liabilities and deductible differences, Assets	9.3	10.4
Tax loss and tax credit carryforwards, Assets	80.0	86.6
Valuation allowance, Assets	(3.5)	(2.9)
Adjusted gross deferred tax assets	179.5	174.2
Netting by tax jurisdiction, Assets	(51.8)	(52.2)
Net noncurrent deferred tax asset	127.7	122.0
Inventories, Liabilities	(2.3)	(3.1)
Property and equipment, Liabilities	(57.7)	(56.9)
Other taxable differences, Liabilities	(1.7)	(2.4)
Tax on unremitted earnings of non-U.S. subsidiaries, Liabilities	(10.8)	(11.3)
Adjusted gross deferred tax liabilities	(72.5)	(73.7)
Netting by tax jurisdiction, Liabilities	51.8	52.2
Net noncurrent deferred tax liability	$ (20.7)	$ (21.5)

Income Taxes - Additional Information (Detail) - USD ($)		3 Months Ended					6 Months Ended		12 Months Ended
	Dec. 31, 2017	Dec. 31, 2019	Dec. 31, 2018	Mar. 31, 2018	Dec. 31, 2017	Sep. 30, 2017	Dec. 31, 2017	Jun. 30, 2017	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Income Tax [Line Items]
Deferred tax assets valuation allowance		$ 3,500,000	$ 2,900,000						$ 3,500,000	$ 2,900,000
Transition tax			(1,700,000)		$ 76,200,000					(1,700,000)	$ 76,200,000
Income tax liability payable period	8 years
Noncurrent payable to affiliate		56,600,000	56,600,000						56,600,000	56,600,000
Current payable to affiliate		21,300,000	27,100,000						21,300,000	27,100,000
Current cash income tax expense			3,700,000						2,400,000	3,700,000
Valuation allowance									700,000		(205,400,000)
Current cash tax benefit									(21,900,000)	(51,100,000)	(37,500,000)
Non-cash deferred income tax benefit									(5,800,000)	(29,100,000)	145,700,000
Income tax expense (benefit) related to increase (decrease) in reserve for uncertain tax positions			700,000	$ 1,400,000					700,000	2,100,000	(8,600,000)
Amount of interest and penalties		0	0						0	0
Unrecognized Tax Benefits	$ 2,100,000	3,900,000	4,100,000		2,100,000		$ 2,100,000		3,900,000	4,100,000	2,100,000	$ 9,900,000
Unrecognized tax benefits that would impact effective tax rate		3,900,000							$ 3,900,000
U.S. - Canada APA
Income Tax [Line Items]
Advance Pricing Agreement, description									At December 31, 2019, none of our U.S. and non-U.S. tax returns were under examination. 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.
Non-U.S. subsidiary treated as dual resident
Income Tax [Line Items]
Valuation allowance					(18,700,000)
Canadian and German Subsidiaries \| Canada - Germany APA
Income Tax [Line Items]
Income tax expense (benefit) related to increase (decrease) in reserve for uncertain tax positions						$ (8,600,000)
Non-cash income tax benefit related to increase in German NOLs						2,600,000
Cash tax refund						$ 600,000
German Subsidiary \| Canada - Germany APA
Income Tax [Line Items]
Noncash income tax benefit related to APA tax settlement payment				$ 1,400,000
European and Canadian Subsidiaries
Income Tax [Line Items]
Deferred income tax on undistributed earnings of european and canadian subsidiaries					$ 4,500,000					2,400,000
Deferred Tax Asset Noncurrent
Income Tax [Line Items]
Unrecognized Tax Benefits		2,100,000							$ 2,100,000
Valhi \| Income Tax Payable
Income Tax [Line Items]
Payable to affiliate		62,600,000	$ 62,600,000						62,600,000	$ 62,600,000
Noncurrent payable to affiliate		56,600,000							56,600,000
Current payable to affiliate		6,000,000							$ 6,000,000
Maximum
Income Tax [Line Items]
Percentage of annual usage limitation on net operating loss carryforward									80.00%
Reversal of Valuation Allowance
Income Tax [Line Items]
Deferred tax assets valuation allowance												173,000,000
Increase (decrease) in non-cash deferred income tax asset valuation allowance							$ (24,100,000)	$ (149,900,000)
Effect of Currency Exchange Rates
Income Tax [Line Items]
Increase (decrease) in non-cash deferred income tax asset valuation allowance											13,700,000
Germany
Income Tax [Line Items]
Income tax benefit		3,000,000							$ 3,000,000
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							5,500,000
Germany \| Reversal of Valuation Allowance
Income Tax [Line Items]
Deferred tax assets valuation allowance												153,000,000
Increase (decrease) in non-cash deferred income tax asset valuation allowance								(141,900,000)
Germany \| Corporate Purposes
Income Tax [Line Items]
Net operating loss carryforwards		501,000,000							501,000,000
Belgium \| Reversal of Valuation Allowance
Income Tax [Line Items]
Deferred tax assets valuation allowance												$ 20,000,000
Increase (decrease) in non-cash deferred income tax asset valuation allowance								(8,000,000)
Belgium \| Corporate Purposes
Income Tax [Line Items]
Net operating loss carryforwards		$ 8,000,000							$ 8,000,000
Germany and Belgian
Income Tax [Line Items]
Increase (decrease) in non-cash deferred income tax asset valuation allowance								$ (12,700,000)			$ (186,700,000)

Income Taxes - Changes in Amount of Uncertain Tax Positions (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Changes in unrecognized tax benefits:
Unrecognized tax benefits at beginning of year	$ 4.1	$ 2.1	$ 9.9
Net increase (decrease):
Tax positions taken in prior periods	(0.8)	1.4	(6.3)
Tax positions taken in current period	0.7	0.7	0.2
Lapse due to applicable statute of limitations			(0.1)
Settlements with taxing authorities			(2.3)
Change in currency exchange rates	(0.1)	(0.1)	0.7
Unrecognized tax benefits at end of year	$ 3.9	$ 4.1	$ 2.1

Stockholders' equity - Additional Information (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Accumulated Other Comprehensive Income Loss [Line Items]
Existing long-term incentive plan				200,000
Shares available for future award under proposed long term incentive plan	140,900
Shares awarded under proposed long term incentive plan	9,000	5,600	8,000
Number of shares authorized for repurchase				2,000,000
Aggregate purchase price	$ 3.0
Shares available for repurchase under the plan	1,686,008
Common stock
Accumulated Other Comprehensive Income Loss [Line Items]
Stock repurchased and acquired in market transactions	264,992
Aggregate purchase price	$ 3.0

Stockholders' equity - Schedule of Changes in Accumulated Other Comprehensive Loss (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Accumulated Other Comprehensive Income Loss [Line Items]
Beginning Balance	$ 839.8	$ 754.3	$ 395.0
Balance as adjusted		754.3
Ending Balance	816.1	839.8	754.3
Currency Translation
Accumulated Other Comprehensive Income Loss [Line Items]
Beginning Balance	(245.0)	(211.9)	(269.6)
Other comprehensive income (loss)	(1.8)	(33.1)	57.7
Ending Balance	(246.8)	(245.0)	(211.9)
Accumulated Defined Benefit Plans Adjustment \| Defined Benefit Pension Plans
Accumulated Other Comprehensive Income Loss [Line Items]
Beginning Balance	(180.0)	(172.8)	(184.8)
Other comprehensive income (loss)	9.5	10.4	9.8
Net actuarial gain (loss) arising during year	(31.7)	(17.6)	2.2
Ending Balance	(202.2)	(180.0)	(172.8)
Accumulated Defined Benefit Plans Adjustment \| OPEB Plans
Accumulated Other Comprehensive Income Loss [Line Items]
Beginning Balance	0.7	1.2	1.8
Other comprehensive income (loss)	(0.3)	(0.3)	(0.3)
Net actuarial gain (loss) arising during year	(0.2)	(0.2)	(0.3)
Ending Balance	0.2	0.7	1.2
Marketable Securities
Accumulated Other Comprehensive Income Loss [Line Items]
Beginning Balance		4.8	1.8
Change in accounting principle - ASU 2016-01		(4.8)
Balance as adjusted			1.8
Other comprehensive income (loss)			3.0
Ending Balance			4.8
Interest Rate Swap
Accumulated Other Comprehensive Income Loss [Line Items]
Beginning Balance			(2.0)
Other comprehensive income (loss)			(1.5)
Less reclassification adjustment for amounts included in earnings			3.5
Total Accumulated Other Comprehensive Loss
Accumulated Other Comprehensive Income Loss [Line Items]
Beginning Balance	(424.3)	(378.7)	(452.8)
Change in accounting principle - ASU 2016-01		(4.8)
Balance as adjusted	(424.3)	(383.5)	(452.8)
Other comprehensive income (loss)	(24.5)	(40.8)	74.1
Ending Balance	$ (448.8)	$ (424.3)	$ (378.7)

Related Party Transactions - Summary of Receivables from and Payables to Affiliates (Detail) - USD ($) $ in Millions	Dec. 31, 2019	Dec. 31, 2018
Related Party Transaction [Line Items]
Current receivable from affiliate	$ 6.9	$ 13.0
Current payable to affiliate	21.3	27.1
Noncurrent payable to affiliate	56.6	56.6
Other Affiliates \| Other Receivable
Related Party Transaction [Line Items]
Current receivable from affiliate	2.2	2.8
Louisiana Pigment Company, L.P. \| Trade Items
Related Party Transaction [Line Items]
Current receivable from affiliate	4.7	10.2
Current payable to affiliate	16.4	16.7
Valhi \| Income Tax Payable
Related Party Transaction [Line Items]
Current payable to affiliate	4.9	10.4
Valhi \| Income Tax Payable
Related Party Transaction [Line Items]
Noncurrent payable to affiliate	$ 56.6	$ 56.6

Related Party Transactions - Additional Information (Detail) - USD ($)	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Contran
Related Party Transaction [Line Items]
Expense transaction with affiliate	$ 200,000	$ 100,000	$ 100,000
Sublease rent expense	100,000
Contran \| Intercorporate Services Agreement
Related Party Transaction [Line Items]
Intercorporate services fees	22,800,000	21,100,000	16,300,000
LPC \| Titanium Dioxide Pigments
Related Party Transaction [Line Items]
Purchase of TiO2	176,200,000	165,900,000	157,500,000
LPC \| Titanium Dioxide Feedstock
Related Party Transaction [Line Items]
Sales of feedstock ore to LPC	84,100,000	66,900,000	79,400,000
Valhi Inc \| Unsecured Revolving Demand Promissory Note
Related Party Transaction [Line Items]
Outstanding loans under promissory note	$ 0	0
Maximum lending capacity			$ 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	$ 500,000	300,000	$ 400,000
Tall Pines Insurance Inc and EWIRE Inc \| Insurance Premiums
Related Party Transaction [Line Items]
Expense transaction with affiliate	$ 12,500,000	$ 10,400,000	$ 9,300,000

Commitments and Contingencies - Additional Information (Details) $ in Millions	12 Months Ended
	Dec. 31, 2019 USD ($) Customer	Dec. 31, 2018	Dec. 31, 2017
Commitment And Contingencies [Line Items]
TiO2 Customers \| Customer	4,000
Net Sales of TiO2	36.00%	33.00%	34.00%
Feedstock
Commitment And Contingencies [Line Items]
Minimum purchase commitments	$ 897
Various Raw Materials and Services
Commitment And Contingencies [Line Items]
Minimum purchase commitments	$ 74
Net Sales \| Product Concentration Risk \| Titanium Dioxide Pigments
Commitment And Contingencies [Line Items]
Approximate percent sales by volume	94.00%	94.00%	94.00%
Net Sales \| Customer Concentration Risk
Commitment And Contingencies [Line Items]
Approximate percent sales by volume	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, 2019	Dec. 31, 2018	Dec. 31, 2017
European
Schedule Of Net Sales By Geographical Segment [Line Items]
Approximate percent sales by volume	46.00%	44.00%	50.00%
North America
Schedule Of Net Sales By Geographical Segment [Line Items]
Approximate percent sales by volume	34.00%	37.00%	31.00%

Financial Instruments - Additional Information (Detail)	1 Months Ended		8 Months Ended	12 Months Ended
Financial Instruments - Additional Information (Detail)	Sep. 30, 2017 USD ($)	Aug. 31, 2015 USD ($)	Aug. 31, 2017 USD ($)	Dec. 31, 2019 EUR (€) DerivativeContract	Dec. 31, 2018 DerivativeContract	Dec. 31, 2017 USD ($)
Financial Instrument At Fair Value [Line Items]
Interest rate swap termination payment included in cash paid for interest						$ 3,300,000
Term Loan
Financial Instrument At Fair Value [Line Items]
Termination of interest rate swap contract	$ 3,300,000
Senior Notes
Financial Instrument At Fair Value [Line Items]
Debt instrument base principal amount \| €				€ 1,000
Debt instrument estimated market price per 1000 principal amount \| €				€ 1,020
Currency Forward Contracts
Financial Instrument At Fair Value [Line Items]
Number of derivative contracts outstanding \| DerivativeContract				0	0
Interest Rate Swap
Financial Instrument At Fair Value [Line Items]
Pretax unrealized loss recognized in other comprehensive income (loss) related to interest rate swap contract			$ 2,300,000
Gain loss recognized in earnings on hedge ineffectiveness						$ 0
Interest Rate Swap \| Interest Expense
Financial Instrument At Fair Value [Line Items]
Reclassified from accumulated other comprehensive loss in to earnings			$ 2,100,000
Interest Rate Swap \| London Interbank Offered Rate (LIBOR)
Financial Instrument At Fair Value [Line Items]
Interest rate swap, fixed rate		2.016%
Interest rate swap, floor rate		1.00%
Interest rate swap, effective date		Sep. 30, 2015
Derivative instrument, notional amount		$ 344,800,000
Interest rate swap, notional amount decline each quarter		$ 875,000
Interest rate swap, notional amount decline commencing date		Dec. 31, 2015
Interest rate swap, original final maturity date		Feb. 29, 2020

Financial Instruments - Financial Instruments not Carried at Fair Value but which Require Fair Value Disclosure (Detail) - USD ($) $ in Millions	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Fair Value Disclosures [Abstract]
Cash, cash equivalents and restricted cash, Carrying amount	$ 392.3	$ 374.7	$ 323.7	$ 52.3
Long-term debt - Fixed rate Senior Notes, Carrying amount	442.6	452.4
Common stockholders' equity, Carrying amount	816.1	839.8	$ 754.3	$ 395.0
Cash, cash equivalents and restricted cash, Fair value	392.3	374.7
Long-term debt - Fixed rate Senior Notes, Fair value	457.0	412.9
Common stockholders' equity, Fair value	$ 1,549.7	$ 1,335.3

Recent Accounting Pronouncements - Additional Information (Detail) - USD ($) $ in Millions	Dec. 31, 2019	Jan. 01, 2019
New Accounting Pronouncements Or Change In Accounting Principle [Line Items]
Operating lease right-of-use assets	$ 29.0
Operating lease, liability	$ 28.4
ASU 2016-02
New Accounting Pronouncements Or Change In Accounting Principle [Line Items]
Operating lease right-of-use assets		$ 35.1
Operating lease, liability		$ 34.5

Quarterly Results of Operations (Unaudited) - Quarterly Results of Operation (Detail) - USD ($) $ / shares in Units, $ in Millions	3 Months Ended								12 Months Ended
	Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Selected Quarterly Financial Information [Abstract]
Net sales	$ 372.7	$ 437.4	$ 484.5	$ 436.5	$ 349.4	$ 410.3	$ 471.8	$ 430.4	$ 1,731.1	$ 1,661.9	$ 1,729.0
Gross margin	79.7	87.7	109.5	109.3	96.5	119.1	171.8	174.8	386.2	562.2	569.7
Net income	$ 9.4	$ 17.9	$ 29.5	$ 30.3	$ 24.0	$ 32.6	$ 77.7	$ 70.7	$ 87.1	$ 205.0	$ 354.5
Basic and diluted income per share	$ 0.08	$ 0.16	$ 0.25	$ 0.26	$ 0.21	$ 0.28	$ 0.67	$ 0.61	$ 0.75	$ 1.77	$ 3.06

- Definition

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

+ References + Details

Quarterly Results of Operations - Additional Information (Detail) - USD ($) $ in Millions	3 Months Ended			12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Mar. 31, 2018	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Schedule Of Quarterly Financial Information [Line Items]
Current cash tax income tax expense related to GILTI		$ 3.7		$ 2.4	$ 3.7
Income tax expense (benefit) related to increase (decrease) in reserve for uncertain tax positions		$ 0.7	$ 1.4	0.7	$ 2.1	$ (8.6)
Pre-tax insurance settlement gain				2.6
Insurance Claims Related to Property Damage
Schedule Of Quarterly Financial Information [Line Items]
Pre-tax insurance settlement gain	$ 2.6
Germany
Schedule Of Quarterly Financial Information [Line Items]
Non-cash deferred income tax expense	5.5			5.5
Income tax benefit	$ 3.0			$ 3.0