Kronos Worldwide (KRO) 10-K 10 Mar 17 2016 FY Annual report Financial data

Document and Entity Information

Document and Entity Information - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2016	Feb. 28, 2017	Jun. 30, 2016
Document And Entity Information [Abstract]
Document Type	10-K
Amendment Flag	false
Document Period End Date	Dec. 31, 2016
Document Fiscal Year Focus	2,016
Document Fiscal Period Focus	FY
Trading Symbol	KRO
Entity Registrant Name	KRONOS WORLDWIDE INC
Entity Central Index Key	1,257,640
Current Fiscal Year End Date	--12-31
Entity Well-known Seasoned Issuer	No
Entity Current Reporting Status	Yes
Entity Voluntary Filers	No
Entity Filer Category	Accelerated Filer
Entity Common Stock, Shares Outstanding		115,894,098
Entity Public Float			$ 118.4

CONSOLIDATED BALANCE SHEETS

CONSOLIDATED BALANCE SHEETS - USD ($) $ in Millions	Dec. 31, 2016	Dec. 31, 2015
Current assets:
Cash and cash equivalents	$ 50.7	$ 92.5
Restricted cash	1.6	1.8
Accounts and other receivables	241.1	218.3
Receivable from affiliate	3.5	2.5
Inventories, net	343.5	387.2
Prepaid expenses and other	10	8.5
Total current assets	650.4	710.8
Other assets:
Investment in TiO2 manufacturing joint venture	78.9	82.9
Marketable securities	6	2.4
Deferred income taxes	8.1	14
Other	2.2	3.1
Total other assets	95.2	102.4
Property and equipment:
Land	37.3	37.8
Buildings	195.8	197.4
Equipment	947.4	941.6
Mining properties	108.1	102.6
Construction in progress	38.7	29.2
Gross property and equipment	1,327.3	1,308.6
Less accumulated depreciation and amortization	893.3	879.1
Net property and equipment	434	429.5
Total assets	1,179.6	1,242.7
Current liabilities:
Current maturities of long-term debt	3.6	3.8
Accounts payable and accrued liabilities	158.8	172.7
Payables to affiliates	14.7	19.5
Income taxes	5	5.7
Total current liabilities	182.1	201.7
Noncurrent liabilities:
Long-term debt	335.4	337.2
Accrued pension cost	227.3	202.7
Accrued postretirement benefits cost	6.9	6.7
Deferred income taxes	10.5	8.1
Other	22.4	24.4
Total noncurrent liabilities	602.5	579.1
Stockholders’ equity:
Common stock, $.01 par value; 240.0 shares authorized; 115.9 shares issued	1.2	1.2
Additional paid-in capital	1,398.8	1,398.7
Retained deficit	(552.2)	(526)
Accumulated other comprehensive loss	(452.8)	(412)
Total stockholders’ equity	395	461.9
Total liabilities and stockholders’ equity	1,179.6	1,242.7
Commitments and contingencies (Notes 14 and 17)

CONSOLIDATED BALANCE SHEETS (Pa

CONSOLIDATED BALANCE SHEETS (Parenthetical) - $ / shares	Dec. 31, 2016	Dec. 31, 2015
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	115,900,000	115,900,000

CONSOLIDATED STATEMENTS OF OPER

CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) shares in Millions, $ in Millions	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Income Statement [Abstract]
Net sales	$ 1,364.3	$ 1,348.8	$ 1,651.9
Cost of sales	1,107.3	1,156.5	1,302.2
Gross margin	257	192.3	349.7
Selling, general and administrative expense	172.6	178	191.9
Other operating income (expense):
Currency transaction gains (losses), net	5.5	(0.1)	4
Disposition of property and equipment	(0.3)	(0.8)	(0.9)
Other income (expense), net	4.2	(0.9)	(0.7)
Corporate expense	(12.7)	(13.6)	(10.5)
Income (loss) from operations	81.1	(1.1)	149.7
Other income (expense):
Interest and dividend income	0.6	0.8	1
Securities transactions, net		(12)
Interest expense	(20.5)	(18.5)	(17)
Income (loss) before income taxes	61.2	(30.8)	133.7
Income tax expense	17.9	142.8	34.5
Net income (loss)	$ 43.3	$ (173.6)	$ 99.2
Net income (loss) per basic and diluted share	$ 0.37	$ (1.50)	$ 0.86
Cash dividends per share	$ 0.60	$ 0.60	$ 0.60
Weighted average shares used in the calculation of net income (loss) per share	115.9	115.9	115.9

CONSOLIDATED STATEMENTS OF COMP

CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (LOSS) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Net income (loss)	$ 43.3	$ (173.6)	$ 99.2
Other comprehensive income (loss), net of tax:
Currency translation	(17.6)	(92.2)	(103)
Marketable securities	2.4	2.3	(13.7)
Interest rate swap	0.3	(2.3)
Total other comprehensive loss, net	(40.8)	(76.2)	(183.8)
Comprehensive income (loss)	2.5	(249.8)	(84.6)
Defined Benefit Pension Plans
Other comprehensive income (loss), net of tax:
Defined benefit plans	(25.6)	16.2	(66)
OPEB
Other comprehensive income (loss), net of tax:
Defined benefit plans	$ (0.3)	$ (0.2)	$ (1.1)

CONSOLIDATED STATEMENTS OF STOC

CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY - USD ($) $ in Millions	Total	Common stock	Additional paid-in capital	Retained earnings (deficit)	Accumulated other comprehensive loss
Beginning Balance at Dec. 31, 2013	$ 935.1	$ 1.2	$ 1,398.5	$ (312.6)	$ (152)
Net income (loss)	99.2			99.2
Other comprehensive income (loss), net of tax	(183.8)				(183.8)
Issuance of common stock	0.1		0.1
Dividends paid - $.60 per share	(69.5)			(69.5)
Ending Balance at Dec. 31, 2014	781.1	1.2	1,398.6	(282.9)	(335.8)
Net income (loss)	(173.6)			(173.6)
Other comprehensive income (loss), net of tax	(76.2)				(76.2)
Issuance of common stock	0.1		0.1
Dividends paid - $.60 per share	(69.5)			(69.5)
Ending Balance at Dec. 31, 2015	461.9	1.2	1,398.7	(526)	(412)
Net income (loss)	43.3			43.3
Other comprehensive income (loss), net of tax	(40.8)				(40.8)
Issuance of common stock	0.1		0.1
Dividends paid - $.60 per share	(69.5)			(69.5)
Ending Balance at Dec. 31, 2016	$ 395	$ 1.2	$ 1,398.8	$ (552.2)	$ (452.8)

CONSOLIDATED STATEMENTS OF STO7

CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY (Parenthetical) - $ / shares	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Cash dividends per share	$ 0.60	$ 0.60	$ 0.60
Retained earnings (deficit)
Cash dividends per share	$ 0.60	$ 0.60	$ 0.60

CONSOLIDATED STATEMENTS OF CASH

CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Cash flows from operating activities:
Net income (loss)	$ 43.3	$ (173.6)	$ 99.2
Depreciation and amortization	40.5	42.1	49.2
Deferred income taxes	7.7	138.5	19.6
Securities transactions, net		12
Benefit plan expense greater than cash funding	5.8	5.1	0.5
Distributions from TiO2 manufacturing joint venture, net	3.6	6.5	10.6
Other, net	3	6.3	10.7
Change in assets and liabilities:
Accounts and other receivables	(37.4)	20.1	(27.8)
Inventories	38.8	(9.5)	(52.3)
Prepaid expenses	(1.5)	(1.6)	(0.4)
Accounts payable and accrued liabilities	(12.9)	(12)	(21.1)
Income taxes	3.8	(1.5)	6.3
Accounts with affiliates	(5.8)	19.2	(4.1)
Other noncurrent assets	0.3	0.3	2.6
Other noncurrent liabilities	0.4	0.2	(5.3)
Net cash provided by operating activities	89.6	52.1	87.7
Cash flows from investing activities -
Capital expenditures	(53)	(47.1)	(61.2)
Net cash used in investing activities	(53)	(47.1)	(61.2)
Indebtedness:
Borrowings	266.2	1.3	430.4
Principal payments	(270)	(3.9)	(265.2)
Deferred financing fees			(6.1)
Dividends paid	(69.5)	(69.5)	(69.5)
Net cash provided by (used in) financing activities	(73.3)	(72.1)	89.6
Cash, cash equivalents and restricted cash – net change from:
Operating, investing and financing activities	(36.7)	(67.1)	116.1
Effect of exchange rate changes	(5.3)	(8.5)	(10)
Net change for the year	(42)	(75.6)	106.1
Balance at beginning of year	94.3	169.9	63.8
Balance at end of year	52.3	94.3	169.9
Cash paid for:
Interest, net of amounts capitalized	18.4	16.6	14.7
Income taxes	6.6	1.4	17.5
Accrual for capital expenditures	$ 8	$ 6.8	$ 7

Summary of Significant Accounti

Summary of Significant Accounting Policies	12 Months Ended
	Dec. 31, 2016
Accounting Policies [Abstract]
Summary of Significant Accounting Policies	Note 1 – Summary of significant accounting policies: Organization and basis of presentation At December 31, 2016, 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 93% of Valhi’s outstanding common stock. All of Contran’s outstanding voting stock is held by a family trust established for the benefit of Lisa K. Simmons and Serena Simmons Connelly and their children, for which Ms. Simmons and Ms. Connelly are co-trustees, or is held directly by Ms. Simmons and Ms. Connelly or entities related to them. Consequently, Ms. Simmons and Ms. Connelly may be deemed to control Contran, Valhi, NL and us. Unless otherwise indicated, references in this report to “we,” “us” or “our” refers 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 income (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 18. Cash and cash equivalents – We classify bank time deposits and U.S. Treasury securities purchased under short-term agreements to resell 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 unfunded 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 and unrealized gains or losses on these securities are recognized through other comprehensive income, net of deferred income taxes, except for any decline in value we conclude is other than temporary, which is accounted for as a realized loss as a component of net income. We base realized gains and losses upon the specific identification of the securities sold. We evaluate our investments whenever events or conditions occur to indicate that the fair value of such investments has declined below their carrying amounts. If the carrying amount for an investment declines below its historical cost basis, we evaluate all available positive and negative evidence including, but not limited to, the extent and duration of the impairment, business prospects for the investee and our intent and ability to hold the investment for a reasonable period of time sufficient for the recovery of fair value. If we determine the decline in fair value is other than temporary, the carrying amount of the investment is written down to fair value. See Notes 6, 10 and 18. 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 market, 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 overheads 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 TiO 2 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. 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 $2.9 million in 2014, $1.1 million in 2015 and $ .9 million in 2016. 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 or discounted cash flow 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 retirement plans are described in Note 10. 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 17. 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 $8.2 million in 2014 and $.8 million in 2016, and received net income tax refunds from Valhi of $3.5 million in 2015. 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. The earnings of non-U.S. subsidiaries subject to permanent reinvestment plans aggregated $660 million at December 31, 2016. It is not practical for us to determine the amount of the unrecognized deferred income tax liability related to such earnings due to the complexities associated with the U.S. taxation on earnings of non-U.S. subsidiaries repatriated to the U.S. 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 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 14. Net sales – We record sales when products are shipped and title and other risks and rewards of ownership have passed to the customer. Shipping terms of products shipped are generally FOB shipping point, although in some instances shipping terms are FOB destination point (for which we do not recognize sales until the product is received by the customer) or other standard shipping terms. We state sales net of price, early payment and distributor discounts and volume rebates. 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). 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 $95 million in 2014, $87 million in 2015 and $90 million in 2016. We expense research, development and certain sales technical support costs as incurred and these costs approximated $19 million in 2014, $16 million in 2015 and $13 million in 2016. We expense advertising costs as incurred and these costs were not material in any year presented.

Geographic information

Geographic information	12 Months Ended
	Dec. 31, 2016
Segments Geographical Areas [Abstract]
Geographic Information	Note 2 – Geographic information: Our operations are associated with the production and sale of titanium dioxide pigments (TiO 2 2 2 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, 2014 2015 2016 (In millions) Net sales – point of origin: Germany $ 844.1 $ 690.0 $ 699.8 United States 783.1 657.8 664.2 Canada 252.3 216.9 257.7 Belgium 249.3 198.8 187.4 Norway 256.8 183.5 164.8 Eliminations (733.7 ) (598.2 ) (609.6 ) Total $ 1,651.9 $ 1,348.8 $ 1,364.3 Net sales – point of destination: Europe $ 882.9 $ 700.4 $ 697.6 North America 544.3 421.4 413.2 Other 224.7 227.0 253.5 Total $ 1,651.9 $ 1,348.8 $ 1,364.3 December 31, 2015 2016 (In millions) Identifiable assets – net property and equipment: Germany $ 212.1 $ 208.2 Belgium 80.1 78.6 Norway 69.5 73.3 Canada 53.8 59.3 Other 14.0 14.6 Total $ 429.5 $ 434.0

Accounts and Other Receivables

Accounts and Other Receivables	12 Months Ended
	Dec. 31, 2016
Receivables [Abstract]
Accounts and Other Receivables	Note 3 – Accounts and other receivables: December 31, 2015 2016 (In millions) Trade receivables $ 194.8 $ 224.8 Recoverable VAT and other receivables 17.8 16.7 Refundable income taxes 6.8 .3 Allowance for doubtful accounts (1.1 ) (.7 ) Total $ 218.3 $ 241.1

Inventories, Net

Inventories, Net	12 Months Ended
	Dec. 31, 2016
Inventory Disclosure [Abstract]
Inventories, Net	Note 4 – Inventories, net: December 31, 2015 2016 (In millions) Raw materials $ 75.9 $ 68.7 Work in process 21.1 22.3 Finished products 232.4 195.7 Supplies 57.8 56.8 Total $ 387.2 $ 343.5

Investment in TiO2 Manufacturin

Investment in TiO2 Manufacturing Joint Venture	12 Months Ended
	Dec. 31, 2016
Equity Method Investments And Joint Ventures [Abstract]
Investment in TiO2 Manufacturing Joint Venture	Note 5 – Investment in TiO 2 We own a 50% interest in Louisiana Pigment Company, L.P. (LPC). LPC is a manufacturing joint venture whose other 50%-owner is Huntsman P&A Investments LLC (HPA) (formerly Tioxide Americas LLC). HPA is a subsidiary of Huntsman Corporation. LPC owns and operates a chloride-process TiO 2 We and HPA are both required to purchase one-half of the TiO 2 2 2 Years ended December 31, 2014 2015 2016 (In millions) Distributions from LPC $ 48.0 $ 48.2 $ 35.0 Contributions to LPC (37.4 ) (41.7 ) (31.4 ) Net distributions $ 10.6 $ 6.5 $ 3.6 Summary balance sheets of LPC are shown below: December 31, 2015 2016 (In millions) ASSETS Current assets $ 96.2 $ 94.5 Property and equipment, net 110.1 111.6 Total assets $ 206.3 $ 206.1 LIABILITIES AND PARTNERS' EQUITY Other liabilities, primarily current $ 37.8 $ 45.2 Partners' equity 168.5 160.9 Total liabilities and partners' equity $ 206.3 $ 206.1 Summary income statements of LPC are shown below: Years ended December 31, 2014 2015 2016 (In millions) Revenues and other income: Kronos $ 193.1 $ 176.5 $ 157.9 HPA 193.8 162.5 157.5 Total revenues and other income 386.9 339.0 315.4 Cost and expenses: Cost of sales 386.4 338.5 314.9 General and administrative .5 .5 .5 Total costs and expenses 386.9 339.0 315.4 Net income $ - $ - $ -

Marketable Securities

Marketable Securities	12 Months Ended
	Dec. 31, 2016
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. See Note 18. Because we have classified all of our marketable securities as available-for-sale, any unrealized gains or losses on the securities are recognized through other comprehensive income, net of deferred income taxes. Marketable security Fair value measurement level Market value Cost basis Unrealized gain (loss) (In millions) December 31, 2015: Valhi common stock 1 $ 2.3 $ 3.2 $ (.9 ) NL and CompX common stocks 1 .1 .1 - Total $ 2.4 $ 3.3 $ (.9 ) December 31, 2016: Valhi common stock 1 $ 5.9 $ 3.2 $ 2.7 NL and CompX common stocks 1 .1 .1 - Total $ 6.0 $ 3.3 $ 2.7 At December 31, 2015 and 2016, 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, 2015 and 2016, the quoted per share market price of Valhi’s common stock was $1.34 and $3.46, 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. Securities transactions in 2015 includes a third-quarter aggregate $12.0 million pre-tax other than temporary impairment charge to write down the cost basis of our investment in the 1.7 million shares of Valhi’s common stock to its aggregate market value at September 30, 2015.

Other Noncurrent Assets

Other Noncurrent Assets	12 Months Ended
	Dec. 31, 2016
Deferred Costs Capitalized Prepaid And Other Assets Disclosure [Abstract]
Other Noncurrent Assets	Note 7 – Other noncurrent assets: December 31, 2015 2016 (In millions) Pension asset $ .4 $ .6 Deferred financing costs, net 1.0 .4 Other 1.7 1.2 Total $ 3.1 $ 2.2

Long-Term debt

Long-Term debt	12 Months Ended
	Dec. 31, 2016
Debt Disclosure [Abstract]
Long-Term Debt	Note 8 – Long-term debt: December 31, 2015 2016 (In millions) Term loan $ 338.0 $ 335.9 Other 3.0 3.1 Total debt 341.0 339.0 Less current maturities 3.8 3.6 Total long-term debt $ 337.2 $ 335.4 Term loan – In February 2014, we entered into a new $350 million term loan. The term loan was issued at 99.5% of the principal amount, or an aggregate of $348.3 million. We used $170 million of the net proceeds of the term loan to prepay the outstanding principal balance of our note payable to Contran (along with accrued and unpaid interest through the prepayment date) and such note payable was cancelled. The remaining net proceeds of the term loan were available for our general corporate purposes. The term loan, as amended in May 2015: • bears interest, at our option, at LIBOR (with LIBOR no less than 1.0%) plus 3.00%, or the base rate, as defined in the agreement, plus • requires quarterly principal repayments of $875,000 which commenced in June 2014, other mandatory principal repayments of formula-determined amounts under specified conditions with all remaining principal balance due in February 2020. Voluntary principal prepayments are permitted at any time; • is collateralized by, among other things, a first priority lien on (i) 100% of the common stock of certain of our U.S. wholly-owned subsidiaries, (ii) 65% of the common stock or other ownership interest of our Canadian subsidiary (Kronos Canada, Inc.) and certain first-tier European subsidiaries (Kronos Titan GmbH and Kronos Denmark ApS) and (iii) a $395.7 million unsecured promissory note issued by our wholly-owned subsidiary, Kronos International, Inc. (KII) to us; • is also collateralized by a second priority lien on all of the U.S. assets which collateralize our North American revolving facility, as discussed below; • contains a number of covenants and restrictions which, among other things, restrict our ability to incur additional debt, incur liens, pay dividends or merge or consolidate with, or sell or transfer substantially all of our assets to, another entity and contains other provisions and restrictive covenants customary in lending transactions of this type (however, there are no ongoing financial maintenance covenants); and • contains customary default provisions, including a default under any of our other indebtedness in excess of $50 million. Prior to the May 2015 amendment to the term loan, the applicable margin on outstanding LIBOR-based borrowings was 3.75% and the applicable margin on outstanding base rate borrowings was 2.75%. All other terms of the term loan, including principal repayments, maturity and collateral remain unchanged. We accounted for such amendment to our term loan as a modification of the terms of the term loan. We paid a $750,000 refinancing fee in connection with this amendment, which along with the existing unamortized deferred financing costs associated with the term loan are being amortized over the remaining term of the loan. The average interest rate on the term loan borrowings was 4.0% as of and for the year ended December 31, 2016. The carrying value of the term loan at December 31, 2016 is stated net of unamortized original issue discount of $.9 million and debt issuance costs of $3.6 million (December 31, 2015 - $1.2 million and $4.7 million). See Note 18 for a discussion of the interest rate swap we entered into in the third quarter of 2015 pursuant to our interest rate risk management strategy. Revolving credit facilities Revolving North American credit facility – In June 2012, we entered into a $125 million revolving bank credit facility. As amended in January 2017, the facility matures the earlier of (i) January 30, 2022 or (ii) 90 days prior to the maturity date of our term loan (or the maturity date of any new term loan constituting a permitted refinancing of the existing term loan). Based on the February 2020 maturity date of our existing term loan, the maturity date of the North American credit facility is currently November 2019. 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 1.1 to 1.0. We had no borrowings or repayments under this facility during 2015. During 2016, we borrowed $266.2 million and repaid $266.2 million under this facility. At December 31, 2016 we had approximately $74.8 million available for borrowing under this revolving facility. Revolving European credit facility – Our operating subsidiaries in Germany, Belgium, Norway and Denmark have a €120 million secured revolving bank credit facility that matures in September 2017. We expect to extend the maturity date of this facility on or prior to its maturity date. We may denominate borrowings in euros, Norwegian kroner or U.S. dollars. Outstanding borrowings bear interest at LIBOR plus 1.90%. 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, restrict 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 2015 and 2016 and at December 31, 2016, 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 income tax, interest, depreciation and amortization expense (EBITDA) of the borrowers. Based upon the borrowers’ last twelve months EBITDA as of December 31, 2016 and the net debt to EBITDA financial test, our borrowing availability at December 31, 2016 is approximately 47% of the credit facility, or €55.8 million ($58.5 million). Aggregate maturities and other – Aggregate maturities of debt at December 31, 2016 are presented in the table below. Year ending December 31, Amount (In 2017 $ 3.6 2018 4.1 2019 4.2 2020 330.6 2021 .7 2022 and thereafter .3 Gross maturities 343.5 Less original issue discount and debt issuance costs 4.5 Total $ 339.0 We are in compliance with all of our debt covenants at December 31, 2016.

Accounts Payable and Accrued Li

Accounts Payable and Accrued Liabilities	12 Months Ended
	Dec. 31, 2016
Payables And Accruals [Abstract]
Accounts Payable and Accrued Liabilities	Note 9 – Accounts payable and accrued liabilities: December 31, 2015 2016 (In millions) Accounts payable $ 96.1 $ 84.9 Accrued sales discounts and rebates 18.9 20.9 Employee benefits 14.2 17.7 Reserve for uncertain tax positions - 3.3 Interest rate swap contract 3.3 2.9 Accrued workforce reduction costs 5.3 1.2 Other 34.9 27.9 Total $ 172.7 $ 158.8 See Note 18 for a discussion of the interest rate swap contract, and Note 13 for a discussion on accrued workforce reduction costs.

Employee Benefit Plans

Employee Benefit Plans	12 Months Ended
	Dec. 31, 2016
Compensation And Retirement Disclosure [Abstract]
Employee Benefit Plans	Note 10 – Employee benefit 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 $2.6 million in 2014, $2.7 million in 2015 and $2.8 million in 2016. Accounting for defined benefit and postretirement benefits other than pensions (OPEB) plans – 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 (loss), to the extent they are reflected in periodic benefit cost, or through other comprehensive income (loss). Defined benefit 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 accrued 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 expect to contribute the equivalent of approximately $14.8 million to all of our defined benefit pension plans during 2017. Benefit payments to plan participants out of plan assets are expected to be the equivalent of: Years ending December 31, Amount (In millions) 2017 $ 20.1 2018 20.4 2019 20.9 2020 22.1 2021 22.6 Next 5 years 124.4 The funded status of our non-U.S. defined benefit pension plans is presented in the table below. December 31, 2015 2016 (In millions) Change in projected benefit obligations (PBO): Benefit obligations at beginning of the year $ 648.4 $ 569.7 Service cost 11.2 9.9 Interest cost 14.6 14.7 Participant contributions 1.6 1.5 Actuarial losses (gains) (8.7 ) 33.7 Change in currency exchange rates (76.4 ) (15.0 ) Benefits paid (21.0 ) (20.4 ) Benefit obligations at end of the year 569.7 594.1 Change in plan assets: Fair value of plan assets at beginning of the year 414.8 372.0 Actual return on plan assets 10.6 10.0 Employer contributions 17.1 15.3 Participant contributions 1.6 1.5 Change in currency exchange rates (51.1 ) (6.9 ) Benefits paid (21.0 ) (20.4 ) Fair value of plan assets at end of year 372.0 371.5 Funded status $ (197.7 ) $ (222.6 ) Amounts recognized in the balance sheet: Noncurrent pension asset $ .4 $ .6 Noncurrent accrued pension costs (198.1 ) (223.2 ) Total $ (197.7 ) $ (222.6 ) Accumulated other comprehensive loss: Actuarial losses $ 230.6 $ 257.5 Prior service cost 1.9 1.6 Total $ 232.5 $ 259.1 Accumulated benefit obligations (ABO) $ 545.2 $ 569.5 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, net transition obligations and recognized actuarial losses for 2014, 2015 and 2016 were recognized as components of our accumulated other comprehensive income (loss) at December 31, 2013, 2014 and 2015, respectively, net of deferred income taxes. Years ended December 31, 2014 2015 2016 (In millions) Net periodic pension cost: Service cost benefits $ 9.9 $ 11.2 $ 9.9 Interest cost on PBO 21.7 14.6 14.7 Expected return on plan assets (20.0 ) (16.6 ) (14.4 ) Settlement gain (.3 ) - - Recognized actuarial losses 10.0 13.6 11.3 Amortization of prior service cost .5 .4 .2 Amortization of net transition obligations .1 - - Total $ 21.9 $ 23.2 $ 21.7 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, 2015 2016 (In millions) Plans for which the ABO exceeds plan assets: PBO $ 518.1 $ 541.5 ABO 498.7 521.8 Fair value of plan assets 321.6 319.5 The weighted-average rate assumptions used in determining the actuarial present value of benefit obligations for our non-U.S. defined benefit pension plans as of December 31, 2015 and 2016 are presented in the table below. December 31, Rate 2015 2016 Discount rate 2.6 % 2.1 % Increase in future compensation levels 2.9 % 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 2014, 2015 and 2016 are presented in the table below. Years ended December 31, Rate 2014 2015 2016 Discount rate 3.8 % 2.5 % 2.6 % Increase in future compensation levels 2.7 % 2.6 % 2.9 % Long-term return on plan assets 5.0 % 4.6 % 3.9 % 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, 2015 2016 (In millions) Change in PBO: Benefit obligations at beginning of the year $ 19.8 $ 18.6 Interest cost .8 .8 Actuarial gains (1.0 ) (.6 ) Benefits paid (1.0 ) (1.0 ) Benefit obligations at end of the year 18.6 17.8 Change in plan assets: Fair value of plan assets at beginning of the year 15.5 13.9 Actual return (loss) on plan assets (.7 ) .5 Employer contributions .1 .2 Benefits paid (1.0 ) (1.0 ) Fair value of plan assets at end of year 13.9 13.6 Funded status $ (4.7 ) $ (4.2 ) Amounts recognized in the balance sheet: Accrued pension costs: Current $ (.1 ) $ (.1 ) Noncurrent (4.6 ) (4.1 ) Total $ (4.7 ) $ (4.2 ) Accumulated other comprehensive loss - actuarial losses $ 11.6 $ 11.0 ABO $ 18.6 $ 17.8 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 2014, 2015 and 2016 were recognized as components of our accumulated other comprehensive income (loss) at December 31, 2013, 2014 and 2015 respectively, net of deferred income taxes. Years ended December 31, 2014 2015 2016 (In millions) Net periodic pension cost (income): Interest cost on PBO $ .8 $ .8 $ .8 Expected return on plan assets (1.2 ) (1.1 ) (1.0 ) Recognized actuarial losses .3 .5 .5 Total $ (.1 ) $ .2 $ .3 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, 2015 and 2016 are 4.1% and 3.9%, 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 2014, 2015 and 2016 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 2014 2015 2016 Discount rate 4.5 % 3.8 % 4.1 % Long-term return on plan assets 7.5 % 7.5 % 7.5 % 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 above tables for actuarial losses and prior service cost at December 31, 2015 and 2016 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 income (loss) at December 2015 and 2016. We expect approximately $12.8 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 2017. The table below details the changes in our consolidated other comprehensive income (loss) during 2014, 2015 and 2016. Years ended December 31, 2014 2015 2016 (In millions) Changes in plan assets and benefit obligations recognized in other comprehensive income (loss): Current year: Net actuarial gain (loss) $ (103.9 ) $ 2.7 $ (38.0 ) Settlements (.3 ) - - Amortization of unrecognized: Net actuarial losses 10.3 14.1 11.8 Prior service cost .5 .4 .2 Net transition obligations .1 - - Total $ (93.3 ) $ 17.2 $ (26.0 ) At December 31, 2015 and 2016, 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 benefits plans sponsored by Contran and certain of its affiliates. For 2014, 2015 and 2016, the long-term rate of return assumption for plan assets invested in the CMRT was The CMRT unit value is determined semi-monthly, and the plans have the ability to redeem all or any portion of their investment in the CMRT at any time based on the most recent semi-monthly valuation. However, the plans do not have the right to individual assets held by the CMRT and the CMRT has the sole discretion in determining how to meet any redemption request. For purposes of our plan asset disclosure, we consider the investment in the CMRT as a Level 2 input because (i) the CMRT value is established semi-monthly and the plans have the right to redeem their investment in the CMRT, in part or in whole, at any time based on the most recent value and (ii) observable inputs from Level 1 or Level 2 (or assets not subject to classification in the fair value hierarchy) were used to value approximately 91% and 92% of the assets of the CMRT at December 31, 2015 and 2016, respectively, as noted below. CMRT assets not subject to classification in the fair value hierarchy consist principally of certain investments measured at net asset value per share in accordance with ASC 820-10. The aggregate fair value of all of the CMRT assets, including funds of Contran and its other affiliates that also invest in the CMRT, and supplemental asset mix details of the CMRT are as follows: December 31, 2015 2016 (In millions) CMRT asset value $ 648.8 $ 637.8 CMRT assets comprised of: Assets not subject to fair value hierarchy 30 % 30 % Assets subject to fair value hierarchy: Level 1 54 54 Level 2 7 8 Level 3 9 8 100 % 100 % CMRT asset mix: Domestic equities, principally publicly traded 29 % 31 % International equities, principally publicly traded 22 22 Fixed income securities, principally publicly traded 38 36 Privately managed limited partnerships 5 5 Hedge funds 5 5 Other, primarily cash 1 1 100 % 100 % In determining the expected long-term rate of return on 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 plan 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 input because there is not an active market that approximates the value of our investment in the Bayer investment fund. We determine the fair value of the Bayer plan assets based on periodic reports we receive from the managers of the Bayer plan. These periodic reports are subject to audit by the German pension regulator. • In Canada, we currently have a plan asset target allocation of 35% to equity securities and 65% to fixed income securities. We expect the long-term rate of return for such investments to average approximately 125 basis points above the applicable 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, 79% to fixed income securities, 7% 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 7%, respectively. The majority of Norwegian plan assets are Level 1 inputs because they are traded in active markets; however approximately 11% of our Norwegian plan assets are invested in real estate and other investments not actively traded and are therefore a Level 3 input. • We also have plan assets in Belgium and the United Kingdom. The Belgian 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 December 31, 2015 and 2016 pension plan assets by asset category and fair value level is shown in the table below. Fair Value Measurements at December 31, 2015 Total Quoted prices in active markets (Level 1) Significant other observable inputs (Level 2) Significant unobservable inputs (Level 3) (In millions) Germany $ 223.1 $ - $ - $ 223.1 Canada: Local currency equities 9.6 9.6 - - Non local currency equities 23.3 23.3 - - Local currency fixed income 50.6 50.6 - - Global mutual fund 6.8 6.8 - - Cash and other .5 .5 - - Norway: Local currency equities 2.0 2.0 - - Non local currency equities 3.6 3.6 - - Local currency fixed income 24.5 24.5 - - Non local currency fixed income 4.7 4.7 - - Real estate 4.2 - - 4.2 Cash and other 7.9 6.7 - 1.2 U.S. CMRT 13.9 - 13.9 - Other 11.2 3.5 - 7.7 Total $ 385.9 $ 135.8 $ 13.9 $ 236.2 Fair Value Measurements at December 31, 2016 Total Quoted prices in active markets (Level 1) Significant other observable inputs (Level 2) Significant unobservable inputs (Level 3) (In millions) Germany $ 217.0 $ - $ - $ 217.0 Canada: Local currency equities 14.8 14.8 - - Non local currency equities 19.7 19.7 - - Local currency fixed income 59.5 59.5 - - Cash and other .4 .4 - - Norway: Local currency equities 1.6 1.6 - - Non local currency equities 4.1 4.1 - - Local currency fixed income 23.2 23.2 - - Non local currency fixed income 5.4 5.4 - - Real estate 4.2 - - 4.2 Cash and other 9.9 8.8 - 1.1 U.S. CMRT 13.7 - 13.7 - Other 11.7 3.5 - 8.2 Total $ 385.2 $ 141.0 $ 13.7 $ 230.5 A rollforward of the change in fair value of Level 3 assets follows. December 31, 2015 2016 (In millions) Fair value at beginning of year $ 254.1 $ 236.2 Gain on assets held at end of year 6.5 4.1 Gain on assets sold during the year .3 - Assets purchased 13.7 13.1 Assets sold (12.4 ) (13.4 ) Currency exchange rate fluctuations (26.0 ) (9.5 ) Fair value at end of year $ 236.2 $ 230.5 Postretirement benefits other than pensions (OPEB) – We provide certain health care and life insurance benefits for eligible Canadian and U.S. retired employees. Certain of our Canadian employees may become eligible for such postretirement health care and life insurance benefits if they reach retirement age while working for us. In the U.S., employees who retired after 1998 are not entitled to any such benefits. The majority of all retirees are required to contribute a portion of the cost of their benefits and certain current and future retirees are eligible for reduced health care benefits at age 65. We have no OPEB plan assets, rather, we fund medical claims as they are paid. Contributions to our OPEB plans to cover benefit payments are expected to be the equivalent of: Years ending December 31, Amount (In millions) 2017 $ .4 2018 .4 2019 .4 2020 .4 2021 .4 Next 5 years 2.2 The funded status of our OPEB plans is presented in the table below: December 31, 2015 2016 (In millions) Change in accumulated OPEB obligations: Obligations at beginning of the year $ 8.5 $ 7.0 Service cost .1 .1 Interest cost .3 .3 Actuarial gains (.2 ) (.1 ) Change in currency exchange rates (1.3 ) .2 Benefits paid from employer contributions (.4 ) (.3 ) Obligations at end of the year 7.0 7.2 Fair value of plan assets - - Funded status $ (7.0 ) $ (7.2 ) Amounts recognized in the balance sheet: Current accrued OPEB costs $ (.3 ) $ (.3 ) Noncurrent accrued OPEB costs (6.7 ) (6.9 ) Total $ (7.0 ) $ (7.2 ) Accumulated other comprehensive income: Net actuarial losses $ 3.1 $ 2.9 Prior service credit (6.2 ) (5.5 ) Total $ (3.1 ) $ (2.6 ) The amounts shown in the table above for net actuarial losses and prior service credit at December 31, 2015 and 2016 have not yet been recognized as components of our periodic OPEB cost as of those dates. These amounts will be recognized as components of our periodic OPEB cost in future years and are recognized, net of deferred income taxes, in our accumulated other comprehensive income (loss). We expect to recognize approximately $.2 million of unrecognized actuarial losses and $.6 million of prior service credit as components of our periodic OPEB cost in 2017. At December 31, 2016, the accumulated OPEB obligations for all OPEB plans comprised $.5 million related to U.S. plans and $6.7 million related to our Canadian plan (in 2015 the amounts were $.6 million and $6.4 million, respectively). The components of our periodic OPEB costs are presented in the table below. The amounts shown below for amortization of prior service credit and recognized actuarial losses for 2014, 2015 and 2016 were recognized as components of our accumulated other comprehensive income (loss) at December 31, 2013, 2014 and 2015, respectively, net of deferred income taxes. Years ended December 31, 2014 2015 2016 (In millions) Net periodic OPEB cost (benefit): Service cost $ .1 $ .1 $ .1 Interest cost .4 .3 .3 Amortization of prior service credit (.9 ) (.8 ) (.8 ) Recognized actuarial losses .2 .3 .2 Total $ (.2 ) $ (.1 ) $ (.2 ) The table below details the changes in benefit obligations recognized in accumulated other comprehensive income (loss) during 2014, 2015 and 2016. Years ended December 31, 2014 2015 2016 (In millions) Changes in benefit obligations recognized in other comprehensive income (loss): Current year: Net actuarial gain (loss) $ (.8 ) $ .2 $ .1 Amortization of unrecognized: Net actuarial loss .2 .3 .2 Prior service cost (.9 ) (.8 ) (.8 ) Total $ (1.5 ) $ (.3 ) $ (.5 ) A summary of our key actuarial assumptions used to determine the net benefit obligation as of December 31, 2015 and 2016 are presented in the table below. The weighted average discount rate was determined using the projected benefit obligation as of such dates. The impact of assumed increases in future compensation levels does not have a material effect on the actuarial present value of the benefit obligation as substantially all of such benefits relate solely to eligible retirees, for which compensation is not applicable. 2015 2016 Healthcare inflation: Initial rate 7.0 % 7.0 % Ultimate rate 5.0 % 5.0 % Year of ultimate rate achievement 2021 2021 Weighted average discount rate 3.9 % 3.5 % Assumed health care cost trend rates affect the amounts we report for health care plans. A one percent change in assumed health care trend rates would not have a material effect on the net periodic OPEB cost for 2016 or on the accumulated OPEB obligation at December 31, 2016. The weighted average discount rate used in determining the net periodic OPEB cost for 2016 was 3.9% (2015 – 3.7%; 2014 – 4.6%). Such weighted average rate was determined using the projected benefit obligation as of the beginning of each year. The impact of assumed increases in future compensation levels does not have a material effect on the net periodic OPEB cost as substantially all of such benefits relate solely to eligible retirees, for which compensation is not applicable. The impact of the assumed rate of return on plan assets also does not have a material effect on the net periodic OPEB cost as there were no plan assets as of December 31, 2015 or 2016. Variances from actuarially-assumed rates will result in additional increases or decreases in accumulated OPEB obligations, net periodic OPEB cost and funding requirements in future periods.

Other Noncurrent Liabilities

Other Noncurrent Liabilities	12 Months Ended
	Dec. 31, 2016
Other Liabilities Disclosure [Abstract]
Other Noncurrent Liabilities	Note 11 – Other noncurrent liabilities: December 31, 2015 2016 (In millions) Reserve for uncertain tax positions $ 11.8 $ 7.3 Employee benefits 7.5 7.8 Interest rate swap contract .2 .2 Other 4.9 7.1 Total $ 24.4 $ 22.4 See Note 18 for a discussion on the interest rate swap contract.

Other Operating Income (Expense

Other Operating Income (Expense), Net	12 Months Ended
	Dec. 31, 2016
Other Operating Income Expense [Abstract]
Other Operating Income (Expense), Net	Note 12 – Other operating income (expense), net: Other operating income (expense), net in 2016 includes income of $3.4 million, recognized in the first and second quarters, related to cash received from settlement of a business interruption insurance claim arising in 2014 and income of $.9 million recognized in the fourth quarter of 2016 related to cash received from settlement of another business interruption insurance claim arising in 2015. No additional material amounts are expected to be received with respect to such insurance claims.

Restructuring Costs

Restructuring Costs	12 Months Ended
	Dec. 31, 2016
Restructuring And Related Activities [Abstract]
Restructuring Costs	Note 13 – Restructuring costs: In the second quarter of 2015, we initiated a restructuring plan designed to improve our long-term cost structure. A portion of such expected cost savings is planned to occur through workforce reductions. During the second, third and fourth quarters of 2015 we implemented certain voluntary and involuntary workforce reductions at certain of our facilities impacting approximately 160 individuals. A substantial portion of such workforce reductions were accomplished through voluntary programs, for which eligible workforce reduction costs are recognized at the time both the employee and employer are irrevocably committed to the terms of the separation. For involuntary programs, eligible costs are recognized when management approves the separation program, the affected employees are properly notified and the costs are estimable. To the extent there is a statutorily-mandated notice period and the affected employee is not required to provide services to us during such notice period, severance and all wages during such notice period are accrued at the time of separation. To the extent the affected employee is required to provide services to us during all or a portion of such notice period, the severance (and if applicable notice period wages for any period beyond the time the affected employee is required to provide future services to us) is accrued ratably over the period in which services will be provided. As of December 31, 2015 we had recognized an aggregate $21.7 million charge for such workforce reductions we had implemented through that date (substantially all of which was recognized in the second quarter of 2015), $10.8 million of which is classified in cost of sales and $10.9 million of which is classified in selling, general and administrative expense. For workforce reductions implemented through December 31, 2015, we do not expect to accrue any further material amounts associated with the affected individuals who are providing service to us past December 31, 2015. Substantially all of the accrued severance costs at December 31, 2016 are expected to be paid in the first quarter of 2017. The table below presents a summary of the activity in our accrued workforce reduction costs during 2015 and 2016: Years ended December 31, 2015 2016 (In millions) Balance at beginning of the year $ - $ 5.6 Workforce reduction costs accrued 21.7 - Workforce reduction costs paid (15.9 ) (4.1 ) Currency translation adjustments, net (.2 ) (.1 ) Balance at end of the year $ 5.6 $ 1.4 Amounts recognized in the balance sheet: Current liability $ 5.3 $ 1.2 Noncurrent liability .3 .2 $ 5.6 $ 1.4

Income Taxes

Income Taxes	12 Months Ended
	Dec. 31, 2016
Income Tax Disclosure [Abstract]
Income Taxes	Note 14 - Income taxes: Years ended December 31, 2014 2015 2016 (In millions) Pre-tax income (loss): U.S. $ 59.2 $ 5.5 $ 11.5 Non-U.S. 74.5 (36.3 ) 49.7 Total $ 133.7 $ (30.8 ) $ 61.2 Expected tax expense (benefit), at U.S. federal statutory income tax rate of 35% $ 46.8 $ (10.8 ) $ 21.4 Non-U.S. tax rates (4.2 ) .5 (4.3 ) Incremental net tax (benefit) on earnings and losses of non-U.S. companies (3.7 ) (8.7 ) 2.2 Valuation allowance - 159.0 (2.2 ) U.S. - Canada APA - - (3.4 ) Adjustment to the reserve for uncertain tax positions, net (5.1 ) .7 2.4 Nondeductible expenses 1.9 2.1 1.5 U.S. state income taxes and other, net (1.2 ) - .3 Provision for income taxes $ 34.5 $ 142.8 $ 17.9 Components of income tax expense: Currently payable: U.S. federal and state $ 1.9 $ .3 $ - Non-U.S. 15.2 3.3 9.5 17.1 3.6 9.5 Deferred income taxes (benefit): U.S. federal and state 10.0 (6.4 ) 4.3 Non-U.S. 7.4 145.6 4.1 17.4 139.2 8.4 Provision for income taxes $ 34.5 $ 142.8 $ 17.9 Years ended December 31, 2014 2015 2016 (In millions) Comprehensive provision for income taxes (benefit) allocable to: Net income $ 34.5 $ 142.8 $ 17.9 Other comprehensive income (loss): Currency translation (16.9 ) - - Marketable securities (6.7 ) 1.1 1.3 Pension plans (30.1 ) 1.5 (.8 ) OPEB plans (.4 ) (.1 ) (.2 ) Interest rate swap - (1.3 ) .2 Total $ (19.6 ) $ 144.0 $ 18.4 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 of 35%. The amount shown on such table for incremental net tax expense (benefit) on earnings and losses on non-U.S. companies includes, as applicable, (i) current income taxes (including withholding taxes, if applicable), if any, associated with any current-year earnings of our non-U.S. subsidiaries to the extent such current-year earnings were distributed to us in the current year, (ii) deferred income taxes (or deferred income tax benefit) associated with the current-year change in the aggregate amount of undistributed earnings of our Canadian subsidiary, which earnings are not subject to a permanent reinvestment plan, in an amount representing the current-year change in the aggregate current income tax that would be generated (including withholding taxes, if applicable) when such aggregate undistributed earnings are distributed to us, and (iii) 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, 2015 and 2016 are summarized in the following table. December 31, 2015 2016 Assets Liabilities Assets Liabilities (In millions) Tax effect of temporary differences related to: Inventories $ 3.2 $ (3.5 ) $ 3.7 $ (3.7 ) Property and equipment - (59.3 ) - (58.1 ) Accrued OPEB costs 2.0 - 2.0 - Accrued pension cost 39.4 - 48.3 - Currency revaluation on intercompany debt 18.6 - 24.0 - Other accrued liabilities and deductible differences 19.4 - 12.6 - Other taxable differences - (.5 ) - (.4 ) Tax on unremitted earnings of non-U.S. subsidiaries - (1.9 ) - (2.9 ) Tax loss and tax credit carryforwards 157.4 - 145.5 - Valuation allowance (168.9 ) - (173.4 ) - Adjusted gross deferred tax assets (liabilities) 71.1 (65.2 ) 62.7 (65.1 ) Netting by tax jurisdiction (57.1 ) 57.1 (54.6 ) 54.6 Net noncurrent deferred tax asset (liability) $ 14.0 $ (8.1 ) $ 8.1 $ (10.5 ) We have substantial net operating loss (NOL) carryforwards in Germany (the equivalent of $638 million and $71 million for German corporate and trade tax purposes, respectively, at December 31, 2016) and in Belgium (the equivalent of $93 million for Belgian corporate tax purposes at December 31, 2016), all of which have an indefinite carryforward period. As a result, we have net deferred income tax assets recognized 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. Prior to June 30, 2015, and using all available evidence, we had concluded no deferred income tax asset valuation allowance was required to be recognized with respect to these net deferred income tax assets under the more-likely-than-not recognition criteria, primarily because (i) the carryforwards have an indefinite carryforward period, (ii) we utilized a portion of such carryforwards during the most recent three-year period, and (iii) we expect to utilize the remainder of the carryforwards over the long term. We had also previously indicated that facts and circumstances could change, which might in the future result in the recognition of a valuation allowance against some or all of such deferred income tax assets. However, as of June 30, 2015, and given our operating results during the second quarter of 2015 and our expectations at that time for our operating results for the remainder of 2015, we did not have sufficient positive evidence to overcome the significant negative evidence of having cumulative losses in the most recent twelve consecutive quarters in both our German and Belgian jurisdictions at June 30, 2015 (even considering that the carryforward period of our German and Belgian NOL carryforwards is indefinite, one piece of positive evidence). Accordingly, at June 30, 2015, 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. Such valuation allowance aggregated $150.3 million at June 30, 2015. We recognized an additional $8.7 million non-cash deferred income tax asset valuation allowance under the more-likely-than-not recognition criteria during the third and fourth quarters of 2015. During 2016, we recognized an aggregate $2.2 million non-cash tax benefit as the result of a net decrease in such deferred income tax valuation allowance, as the impact of utilizing a portion of our German NOLs during such period more than offset the impact of additional losses recognized by our Belgian operations during such period. In addition to the aggregate $159.0 million increase and $2.2 million decrease in the deferred income tax asset valuation allowance recognized as part of the provision for income taxes in 2015 and 2016, respectively, the deferred income tax asset valuation allowance also increased by an aggregate of $9.8 million in 2015 and $6.7 million in 2016 due to amounts recognized in other comprehensive income. Tax authorities are examining certain of our U.S. and non-U.S. tax returns and have or 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 will be resolved in our favor, and therefore our potential exposure, if any, is also uncertain. • In 2011 and 2012 we received notices of re-assessment from the Canadian federal and provincial tax authorities related to the years 2002 through 2004. We objected to the re-assessments and believed the position was without merit. Accordingly, we appealed the re-assessments and in connection with such appeal we were required to post letters of credit aggregating Cdn. $7.9 million. In 2014, the Appeals Division of the Canadian Revenue Authority ruled in our favor and reversed in their entirety such notices of re-assessment. As a result, we recognized a non-cash income tax benefit of $3.0 million related to the release of a portion of our reserve for uncertain tax positions in 2014 related to the completion of this Canadian income tax audit. In addition, the related letters of credit have been cancelled. • Also during 2014, we recognized a non-cash income tax benefit of $3.1 million related to the release of a portion of our reserve for uncertain tax positions in conjunction with the completion of an audit of our U.S. income tax return for 2009. • As a result of ongoing audits in certain jurisdictions, 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 2016, Contran, as the ultimate parent of our U.S. Consolidated income tax group, executed and finalized an Advance Pricing Agreement with the U.S. Internal Revenue Service and our Canadian subsidiary executed and finalized an Advance Pricing Agreement with the Competent Authority for Canada (collectively, the “U.S.-Canada APA”) effective for tax years 2005 – 2015. Pursuant to the terms of the U.S.-Canada APA, the U.S. and Canadian tax authorities agreed to certain prior year changes to taxable income of our U.S. and Canadian subsidiaries. As a result of such agreed-upon changes, we recognized a $3.4 million current U.S. income tax benefit in 2016. In addition, our Canadian subsidiary will incur a cash income tax payment of approximately CAD $3 million (USD $2.3 million) as a result of the U.S.-Canada APA, but such payment was fully offset by previously provided accruals (such USD $2.3 million has not been paid as of December 31, 2016, and is classified as part of income taxes payable at such date). We currently expect the Advance Pricing Agreement between Canada and Germany (collectively, the “Canada-Germany APA”) to be executed and finalized within the next twelve months. We believe we have adequate accruals to cover any cash income tax payment which might result from the finalization of the Canada-Germany APA, and accordingly we do not expect the execution of such APA to have a material adverse effect on our consolidated financial position, results of operations or liquidity. 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 2014, 2015 and 2016 was not material, and at December 31, 2014, 2015 and 2016, we had $2.8 million, $2.3 million and $2.5 million, respectively, accrued 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 2014, 2015 and 2016: Years ended December 31, 2014 2015 2016 (In millions) Changes in unrecognized tax benefits: Unrecognized tax benefits at beginning of year $ 15.9 $ 10.4 $ 9.7 Net increase (decrease): Tax positions taken in prior periods (5.4 ) (.3 ) (.1 ) Tax positions taken in current period 1.1 1.1 2.5 Lapse due to applicable statute of limitations - (.2 ) (.2 ) Settlements with taxing authorities - - (2.3 ) Change in currency exchange rates (1.2 ) (1.3 ) .3 Unrecognized tax benefits at end of year $ 10.4 $ 9.7 $ 9.9 If our uncertain tax positions were recognized, a benefit of $8.8 million, $7.8 million and $10.6 million would affect our effective income tax rates for 2014, 2015 and 2016 respectively. At December 31, 2016, we currently estimate that our unrecognized tax benefits may decrease by $6.3 million excluding interest during the next twelve months related to certain adjustments to our prior year returns and the expiration of certain statutes of limitations. We and Contran file income tax returns in U.S. federal and various state and local jurisdictions. We also file income tax returns in various non-U.S. jurisdictions, principally in Germany, Canada, Belgium and Norway. Our U.S. income tax returns prior to 2013 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 2012 for Germany, 2013 for Belgium, 2011 for Canada and 2007 for Norway.

Stockholders' Equity

Stockholders' Equity	12 Months Ended
	Dec. 31, 2016
Equity [Abstract]
Stockholders' Equity	Note 15 - Stockholders’ equity: Long-term incentive compensation plan – Prior to 2014, our board of directors adopted a new plan that would provide for the award of stock to our board of directors, and up to a maximum of 200,000 shares could be awarded. We awarded 8,000 shares in each of 2014 and 2015 and 13,500 shares in 2016 under this plan, and 163,500 shares are available for future award under this plan at December 31, 2016. Stock repurchase program – Prior to 2014, 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 would use cash on hand or other sources of liquidity to acquire the shares. Repurchased shares will be added to our treasury and cancelled. At December 31, 2016, 1,951,000 shares are available for repurchase under this authorization. Accumulated other comprehensive loss - Changes in accumulated other comprehensive loss for 2014, 2015 and 2016 are presented in the table below. Years ended December 31, 2014 2015 2016 (In millions) Accumulated other comprehensive loss, net of tax: Currency translation: Balance at beginning of year $ (56.8 ) $ (159.8 ) $ (252.0 ) Other comprehensive loss (103.0 ) (92.2 ) (17.6 ) Balance at end of year $ (159.8 ) $ (252.0 ) $ (269.6 ) Marketable securities: Balance at beginning of year $ 10.8 $ (2.9 ) $ (.6 ) Other comprehensive income (loss): Unrealized gains (losses) arising during the year (13.7 ) (6.5 ) 2.4 Less reclassification adjustment for amounts included in realized loss - 8.8 - Balance at end of year $ (2.9 ) $ (.6 ) $ 1.8 Defined benefit pension plans: Balance at beginning of year $ (109.4 ) $ (175.4 ) $ (159.2 ) Other comprehensive income (loss): Amortization of prior service cost and net losses included in net periodic pension cost 7.2 10.0 8.5 Net actuarial gain (loss) arising during year (73.2 ) 6.2 (34.1 ) Balance at end of year $ (175.4 ) $ (159.2 ) $ (184.8 ) OPEB plans: Balance at beginning of year $ 3.4 $ 2.3 $ 2.1 Other comprehensive (income) loss: Amortization of prior service credit and net losses included in net periodic OPEB cost (.5 ) (.4 ) (.4 ) Net actuarial gain (loss) arising during year (.6 ) .2 .1 Balance at end of year $ 2.3 $ 2.1 $ 1.8 Interest rate swap: Balance at beginning of year $ - $ - $ (2.3 ) Other comprehensive loss: Unrealized losses arising during the year - (2.9 ) (2.0 ) Less reclassification adjustment for amounts included in interest expense - .6 2.3 Balance at end of year $ - $ (2.3 ) $ (2.0 ) Total accumulated other comprehensive loss: Balance at beginning of year $ (152.0 ) $ (335.8 ) $ (412.0 ) Other comprehensive loss (183.8 ) (76.2 ) (40.8 ) Balance at end of year $ (335.8 ) $ (412.0 ) $ (452.8 ) See Note 6 for further discussion of our marketable securities, Note 10 for amounts related to our defined benefit pension plans and OPEB plans and Note 18 for discussion of our interest rate swap contract.

Related Party Transactions

Related Party Transactions	12 Months Ended
	Dec. 31, 2016
Related Party Transactions [Abstract]
Related Party Transactions	Note 16 - Related party transactions: We may be deemed to be controlled by Ms. Simmons and Ms. Connelly. 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. Current receivables from and payables to affiliates are summarized in the table below. December 31, 2015 2016 (In millions) Current receivable from affiliate: Income taxes receivable from Valhi $ - $ .7 Other 2.5 2.8 $ 2.5 $ 3.5 Current payables to affiliates: LPC $ 19.4 $ 14.7 Income taxes payable to Valhi .1 - Total $ 19.5 $ 14.7 Amounts payable to LPC are generally for the purchase of TiO 2 2 2 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: • In November 2010, 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, 2018. The amount of our outstanding loans to Valhi at any time is at our discretion. As of December 31, 2015 and 2016, we had no outstanding loans to Valhi under this promissory note; and • In February 2013, we entered into a promissory note with Contran in which we borrowed $190 million on this note and subsequently repaid $20 million during 2013. We prepaid and cancelled this note payable to Contran in February 2014 using a portion of the net proceeds of our new term loan. See Note 8. Interest income (including unused commitment fees) on our loan to Valhi was $.5 million in each of 2014 and 2015 and $.4 million in 2016. Interest expense on our loan from Contran was $1.6 million in 2014. 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 large 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, approved by the independent members of our board of directors, is included in selling, general and administrative expense and corporate expense and was $12.3 million in 2014, $13.4 million in 2015 and $15.2 million in 2016. This agreement is renewed annually and we expect to pay approximately $15.7 million under the ISA during 2017. 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. The aggregate premiums paid to Tall Pines and EWI by us and our joint venture were $10.7 million in 2014, $10.3 million in 2015 and $9.2 million in 2016. These amounts principally represent payments for insurance premiums, which include premiums or fees paid to Tall Pines or fees paid to EWI. 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 or reinsurers paid to third parties on our behalf, as well as amounts for claims and risk management services and various other third-party fees and expenses incurred by the program. We expect these relationships with Tall Pines and EWI will continue in 2017. 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 2014, 2015 and 2016 for such services. We expect that this relationship with Contran will continue in 2017.

Commitments and Contingencies

Commitments and Contingencies	12 Months Ended
	Dec. 31, 2016
Commitments And Contingencies Disclosure [Abstract]
Commitments and Contingencies	Note 17 - 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. 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 either of the two pending matters discussed below, as it is not reasonably possible we have incurred a loss in either case that would be material to our consolidated financial condition, results of operations or liquidity. In March 2013, we were served with the complaint, Los Gatos Mercantile, Inc. d/b/a Los Gatos Ace Hardware, et al v. E.I. Du Pont de Nemours and Company, et al. (United States District Court, for the Northern District of California, Case No. 3:13-cv-01180-SI). The defendants include us, E.I. Du Pont de Nemours & Company, Huntsman International LLC and Millennium Inorganic Chemicals, Inc. As amended by plaintiffs’ third amended complaint (Harrison, Jan, et al v. E.I. Du Pont de Nemours and Company, et al), plaintiffs seek to represent a class consisting of indirect purchasers of titanium dioxide in the states of Arizona, Arkansas, California, the District of Columbia, Florida, Iowa, Kansas, Massachusetts, Michigan, Minnesota, Mississippi, Missouri, Nebraska, New Hampshire, New Mexico, New York, North Carolina, Oregon and Tennessee that indirectly purchased titanium dioxide from one or more of the defendants on or after March 1, 2002. The complaint alleges that the defendants conspired and combined to fix, raise, maintain, and stabilize the price at which titanium dioxide was sold in the United States and engaged in other anticompetitive conduct. The case is now proceeding in the trial court. We believe the action is without merit, will deny all allegations of wrongdoing and liability and intend to defend against the action vigorously. Based on our quarterly status evaluation of this case, we h ave determined that it is not reasonably possible that a loss has been incurred in this case. In September 2016, we were served with the complaint, Home Depot U.S.A., Inc. v. E.I. Dupont Nemours and Company, et al. (United States District Court, for the Northern District of California, Case No. 3:16-cv-04865). The defendants include us, E.I. Du Pont de Nemours & Company, Huntsman International LLC and Millennium Inorganic Chemicals, Inc. The plaintiff alleges that it indirectly purchased titanium dioxide from one or more of the defendants on or after March 1, 2002. The complaint alleges that the defendants conspired and combined to fix, raise, maintain, and stabilize the price at which titanium dioxide was sold in the United States and engaged in other anticompetitive conduct. The case is now proceeding in the trial court. We believe the action is without merit, will deny all allegations of wrongdoing and liability and intend to defend against the action vigorously. Based on our quarterly status evaluation of this case, we have determined that it is not reasonably possible that a loss has been incurred in this case. Concentrations of credit risk - Sales of TiO 2 accounted for 90%, 92% and 93% of our sales in 2014, 2015 and 2016, respectively. 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 TiO 2 production processes). TiO 2 is generally sold to the paint, plastics and paper industries. Such markets are generally considered “quality-of-life” markets whose demand for TiO 2 is influenced by the relative economic well-being of the various geographic regions. We sell TiO 2 to over 4,000 customers, with the top ten customers approximating 35% of net sales in 2014, 34% in 2015 and 33% in 2016. In each of 2014, 2015 and 2016 one customer, Behr Process Corporation, accounted for approximately 10% of our net sales. The table below shows the approximate percentage of our TiO 2 sales by volume for our significant markets, Europe and North America, for the last three years. 2014 2015 2016 Europe 50 % 52 % 51 % North America 33 % 29 % 29 % Long-term contracts - 2 Operating leases - Our principal German operating subsidiary leases the land under its Leverkusen TiO 2 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 TiO 2 production capacity, is located within Bayer’s extensive manufacturing complex. We periodically establish the amount of rent for the land lease associated with the Leverkusen facility 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 for such land lease; rather, any change in the rent is subject solely to periodic negotiation between Bayer and us. We recognize any change in the rent based on such negotiations as part of lease expense starting from the time such change is agreed upon by both parties, as any such change in the rent is deemed “contingent rentals” under GAAP. Under the terms of various supply and services agreements, majority-owned subsidiaries of Bayer provide raw materials, including chlorine, auxiliary and operating materials, utilities and services necessary to operate the Leverkusen facility. These agreements, as amended, expire in 2017 through 2019. We expect to renew these agreements prior to expiration at similar terms and conditions. We also lease various other manufacturing facilities and equipment. Some of the leases contain purchase and/or various term renewal options at fair market and fair rental values, respectively. In most cases we expect that, in the normal course of business, such leases will be renewed or replaced by other leases. Net rent expense approximated $16 million in 2014 and $14 million in each of 2015 and 2016. At December 31, 2016, 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) 2017 $ 10.8 2018 6.3 2019 5.0 2020 4.1 2021 3.5 2022 and thereafter 23.3 Total $ 53.0 Approximately $16 million of the $53.0 million aggregate future minimum rental commitments at December 31, 2016 relates to our Leverkusen facility 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, 2016. As discussed above, any change in the rent is based solely on negotiations between Bayer and us, and any such change in the rent is deemed “contingent rentals” under GAAP which is excluded from the future minimum lease payments disclosed above. 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

Financial Instruments	12 Months Ended
	Dec. 31, 2016
Fair Value Disclosures [Abstract]
Financial Instruments	Note 18 - Financial instruments: The following table summarizes the valuation of our financial instruments recorded on a fair value basis as of December 31, 2015 and 2016: Fair value measurements Total Quoted in active markets (Level 1) Significant other observable inputs (Level 2) Significant unobservable inputs (Level 3) (In millions) Asset (liability) December 31, 2015: Currency forward contracts $ (1.2 ) $ (1.2 ) $ - $ - Interest rate swap contract (3.5 ) - (3.5 ) - Noncurrent marketable securities (See Note 6) 2.4 2.4 - - December 31, 2016: Interest rate swap contract $ (3.1 ) $ - $ (3.1 ) $ - Noncurrent marketable securities (See Note 6) 6.0 6.0 - - 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, 2016, we had no currency forward contracts outstanding. The estimated value of such currency forward contracts at December 31, 2015 was a $1.2 million net liability, which is recognized as part of accounts payable and accrued liabilities in our Consolidated Balance Sheet at such date. We did not use hedge accounting for any of our contracts to the extent we held such contracts during 2014, 2015 and 2016. 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 relates to our forecasted outstanding variable-rate indebtedness. Under this interest rate swap, we will pay a fixed rate of 2.016% per annum, payable quarterly, and receive 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 declines by $875,000 each quarter beginning December 31, 2015, with a final maturity of the swap contract in February 2020. The notional amount of the swap as of December 31, 2016 was $340.4 million. This swap contract has been designated as a cash flow hedge and qualified as an effective hedge at inception under ASC Topic 815. The effective portion of changes in fair value on this interest rate swap is recorded as a component of other comprehensive income, net of deferred income taxes. Commencing in the fourth quarter of 2015, as interest expense accrues on LIBOR-based variable rate debt, we classify the amount we pay under the pay-fixed leg of the swap and the amount we receive under the receive-variable leg of the swap as part of interest expense, with the net effect that the amount of interest expense we recognize on our LIBOR-based variable rate debt each quarter, as it relates to the notional amount of the swap outstanding each quarter, to be based on a fixed rate of 2.016% per annum in lieu of the level of LIBOR prevailing during the quarter. The amount of hedge ineffectiveness, if any, related to the swap will be recorded in earnings (also as part of interest expense). Since the inception of the swap through December 31, 2016, there have been no gains or losses recognized in earnings in the current period representing hedge ineffectiveness with respect to the interest rate swap. During 2015 and 2016, the pretax unrealized loss arising during the year and recognized in other comprehensive income related to the interest rate swap contract was $4.4 million and $3.1 million, respectively. During 2015 and 2016, $.9 million and $3.5 million, respectively, were reclassified from accumulated other comprehensive income into earnings (interest expense). During the next twelve months, the amount of the December 31, 2016 accumulated other comprehensive income balance that is expected to be reclassified to earnings is $3.5 million pre-tax. The fair value of the interest rate swap contract at December 31, 2016 was a $3.1 million liability including $2.9 million recognized as part of accounts payable and accrued liabilities and $.2 million recognized as part of other noncurrent liabilities in our Condensed Consolidated Balance Sheet (at December 31, 2015, we had a $3.5 million liability of which $3.3 million was recognized as part of accounts payable and accrued liabilities and $.2 million recognized as part of other noncurrent liabilities). See Notes 9 and 11. The fair value of the interest rate swap was estimated by a third party using inputs that are observable or that can be corroborated by observable market data such as interest rate yield curves, and therefore, is classified within Level 2 of the valuation hierarchy. The following table presents the financial instruments that are not carried at fair value but which require fair value disclosure as of December 31, 2015 and 2016. December 31, 2015 December 31, 2016 Carrying amount Fair value Carrying amount Fair value (In millions) Cash, cash equivalents and restricted cash $ 94.3 $ 94.3 $ 52.3 $ 52.3 Variable rate term loan 338.0 309.5 335.9 334.6 Common stockholders' equity 461.9 653.6 395.0 1,383.8 At December 31, 2016, the estimated market price of our term loan was $983 per $1,000 principal amount. The fair value of our term loan was based on quoted market prices; however, these quoted market prices represented Level 2 inputs because the markets in which the term loan trades 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 Pronouncement

Recent Accounting Pronouncements	12 Months Ended
	Dec. 31, 2016
New Accounting Pronouncements And Changes In Accounting Principles [Abstract]
Recent Accounting Pronouncements	Note 19 - Recent accounting pronouncements: Adopted In August 2016, the Financial Accounting Standards Board (FASB) issued Accounting Standards Update (ASU) No. 2016-15, Statement of Cash Flows (Topic 230): Classification of Certain Cash Receipts and Cash Payments . This standard provides guidance on eight specific cash flow issues including: debt prepayment or debt extinguishment costs, proceeds from the settlement of insurance claims, distributions from equity method investees and separately identifiable cash flows and application of the predominance principle. The new standard is effective for us beginning with the first quarter of 2018. We have elected to adopt this ASU with this Annual Report without any material effect on the presentation of cash flows in our previously issued Consolidated Financial Statements. In November 2016, the FASB issued ASU No. 2016-18, Statement of Cash Flows (Topic 230): Restricted Cash Pending adoption In May 2014, the FASB issued ASU No. 2014-09, Revenue from Contracts with Customers (Topic 606) In January 2016, the FASB issued ASU 2016-01, Financial Instruments-Overall (Subtopic 825-10): Recognition and Measurement of Financial Assets and Financial Liabilities In February 2016, the FASB issued ASU 2016-02, Leases (Topic 842)

Quarterly Results of Operations

Quarterly Results of Operations	12 Months Ended
	Dec. 31, 2016
Selected Quarterly Financial Information [Abstract]
Quarterly Results of Operations	Note 20 - Quarterly results of operations (unaudited): Quarter ended March June September December (In millions, except per share data) Year ended December 31, 2015 Net sales $ 365.1 $ 360.2 $ 336.5 $ 287.0 Gross margin 77.4 46.5 43.2 25.2 Net income (loss) 18.4 (159.8 ) (11.8 ) (20.4 ) Basic and diluted income (loss) per share $ .16 $ (1.38 ) $ (.10 ) $ (.18 ) Year ended December 31, 2016 Net sales $ 318.4 $ 356.1 $ 356.1 $ 333.7 Gross margin 40.4 55.5 75.5 85.6 Net income (loss) (3.8 ) 1.7 22.2 23.2 Basic and diluted income (loss) per share $ (.03 ) $ .01 $ .19 $ .20 We recognized the following amounts during 2015: • pretax charges of $21.1 million, $.4 million and $.2 million in the second, third and fourth quarters, respectively, in workforce reduction charges (see Note 13), • a $12.0 million non-cash pretax impairment charge in the third quarter due to other-than-temporary impairment on our investment in a marketable security held for sale (see Note 6), and • non-cash deferred income tax expense of $150.3 million, $2.3 million and $6.4 million in the second, third and fourth quarters, respectively, related to the recognition of a deferred income tax asset valuation allowance related to our German and Belgium operations (see Note 14). We recognized the following amounts during 2016: • pre-tax insurance settlement gains of $2.0 million, $1.4 million and $.9 million in the first, second and fourth quarters, respectively, (see Note 12), • current income tax benefit of $5.6 million in the third quarter, and current income tax expense of $2.2 million in the fourth quarter, related to the execution and finalization of an Advance Pricing Agreement between the U.S. and Canada (see Note 14), • non-cash deferred income tax expense (benefit) of $2.9 million, $(.8) million and $(4.3) million in the second, third and fourth quarters, respectively, as the result of a net decrease in our deferred income tax asset valuation allowance related to our German and Belgian operations (see Note 14), and • non-cash income tax expense of $2.4 million related to an increase in our reserve for uncertain tax positions, mostly in the fourth quarter. 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 Accoun29

Summary of Significant Accounting Policies (Policies)	12 Months Ended
	Dec. 31, 2016
Accounting Policies [Abstract]
Organization and Basis of Presentation	Organization and basis of presentation At December 31, 2016, 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 93% of Valhi’s outstanding common stock. All of Contran’s outstanding voting stock is held by a family trust established for the benefit of Lisa K. Simmons and Serena Simmons Connelly and their children, for which Ms. Simmons and Ms. Connelly are co-trustees, or is held directly by Ms. Simmons and Ms. Connelly or entities related to them. Consequently, Ms. Simmons and Ms. Connelly may be deemed to control Contran, Valhi, NL and us. Unless otherwise indicated, references in this report to “we,” “us” or “our” refers to Kronos Worldwide, Inc. and its subsidiaries, taken as a whole.
Management's Estimates	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	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	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 income (loss), net of related deferred income taxes. We recognize currency transaction gains and losses in income currently.
Derivatives and Hedging Activities	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 18.
Cash and Cash Equivalents	Cash and cash equivalents – We classify bank time deposits and U.S. Treasury securities purchased under short-term agreements to resell with original maturities of three months or less as cash equivalents.
Restricted Cash	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 unfunded 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	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 and unrealized gains or losses on these securities are recognized through other comprehensive income, net of deferred income taxes, except for any decline in value we conclude is other than temporary, which is accounted for as a realized loss as a component of net income. We base realized gains and losses upon the specific identification of the securities sold. We evaluate our investments whenever events or conditions occur to indicate that the fair value of such investments has declined below their carrying amounts. If the carrying amount for an investment declines below its historical cost basis, we evaluate all available positive and negative evidence including, but not limited to, the extent and duration of the impairment, business prospects for the investee and our intent and ability to hold the investment for a reasonable period of time sufficient for the recovery of fair value. If we determine the decline in fair value is other than temporary, the carrying amount of the investment is written down to fair value. See Notes 6, 10 and 18.
Accounts Receivable	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	Inventories and cost of sales – We state inventories at the lower of cost or market, 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 overheads 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	Investment in TiO 2 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.
Property and Equipment and Depreciation	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 $ 2.9 million in 2014, $1.1 million in 2015 and $ .9 million in 2016. 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 or discounted cash flow value is required.
Long-term Debt	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.
Income Taxes	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 17. 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 $ 8.2 million in 2014 and $.8 million in 2016, and received net income tax refunds from Valhi of $3.5 million in 2015. 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. The earnings of non-U.S. subsidiaries subject to permanent reinvestment plans aggregated $660 million at December 31, 2016. It is not practical for us to determine the amount of the unrecognized deferred income tax liability related to such earnings due to the complexities associated with the U.S. taxation on earnings of non-U.S. subsidiaries repatriated to the U.S. 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.
Income Tax Uncertainties, Policy	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 14.
Net Sales	Net sales – We record sales when products are shipped and title and other risks and rewards of ownership have passed to the customer. Shipping terms of products shipped are generally FOB shipping point, although in some instances shipping terms are FOB destination point (for which we do not recognize sales until the product is received by the customer) or other standard shipping terms. We state sales net of price, early payment and distributor discounts and volume rebates. 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).
Selling, General and Administrative Expense	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.
Shipping and Handling Costs	We include shipping and handling costs in selling, general and administrative expense and these costs were $95 million in 2014, $87 million in 2015 and $90 million in 2016.
Research and Development	We expense research, development and certain sales technical support costs as incurred and these costs approximated $19 million in 2014, $16 million in 2015 and $13 million in 2016.
Advertising Costs	We expense advertising costs as incurred and these costs were not material in any year presented.
Employee Benefit 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 $ 2.6 million in 2014, $2.7 million in 2015 and $2.8 million in 2016. Accounting for defined benefit and postretirement benefits other than pensions (OPEB) plans – 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 (loss), to the extent they are reflected in periodic benefit cost, or through other comprehensive income (loss). Defined benefit 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 accrued 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.
Concentrations of credit risk	Concentrations of credit risk - Sales of TiO 2 accounted for 90%, 92% and 93% of our sales in 2014, 2015 and 2016, respectively. 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 TiO 2 production processes). TiO 2 is generally sold to the paint, plastics and paper industries. Such markets are generally considered “quality-of-life” markets whose demand for TiO 2 is influenced by the relative economic well-being of the various geographic regions. We sell TiO 2 to over 4,000 customers, with the top ten customers approximating 35% of net sales in 2014, 34% in 2015 and 33% in 2016. In each of 2014, 2015 and 2016 one customer, Behr Process Corporation, accounted for approximately 10% of our net sales. The table below shows the approximate percentage of our TiO 2 sales by volume for our significant markets, Europe and North America, for the last three years. 2014 2015 2016 Europe 50 % 52 % 51 % North America 33 % 29 % 29 %
Operating leases	Operating leases - Our principal German operating subsidiary leases the land under its Leverkusen TiO 2 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 TiO 2 production capacity, is located within Bayer’s extensive manufacturing complex. We periodically establish the amount of rent for the land lease associated with the Leverkusen facility 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 for such land lease; rather, any change in the rent is subject solely to periodic negotiation between Bayer and us. We recognize any change in the rent based on such negotiations as part of lease expense starting from the time such change is agreed upon by both parties, as any such change in the rent is deemed “contingent rentals” under GAAP. Under the terms of various supply and services agreements, majority-owned subsidiaries of Bayer provide raw materials, including chlorine, auxiliary and operating materials, utilities and services necessary to operate the Leverkusen facility. These agreements, as amended, expire in 2017 through 2019. We expect to renew these agreements prior to expiration at similar terms and conditions. We also lease various other manufacturing facilities and equipment. Some of the leases contain purchase and/or various term renewal options at fair market and fair rental values, respectively. In most cases we expect that, in the normal course of business, such leases will be renewed or replaced by other leases. Net rent expense approximated $16 million in 2014 and $14 million in each of 2015 and 2016. At December 31, 2016, 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) 2017 $ 10.8 2018 6.3 2019 5.0 2020 4.1 2021 3.5 2022 and thereafter 23.3 Total $ 53.0 Approximately $16 million of the $53.0 million aggregate future minimum rental commitments at December 31, 2016 relates to our Leverkusen facility 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, 2016. As discussed above, any change in the rent is based solely on negotiations between Bayer and us, and any such change in the rent is deemed “contingent rentals” under GAAP which is excluded from the future minimum lease payments disclosed above.
New Accounting Pronouncements, Policy	Adopted In August 2016, the Financial Accounting Standards Board (FASB) issued Accounting Standards Update (ASU) No. 2016-15, Statement of Cash Flows (Topic 230): Classification of Certain Cash Receipts and Cash Payments . This standard provides guidance on eight specific cash flow issues including: debt prepayment or debt extinguishment costs, proceeds from the settlement of insurance claims, distributions from equity method investees and separately identifiable cash flows and application of the predominance principle. The new standard is effective for us beginning with the first quarter of 2018. We have elected to adopt this ASU with this Annual Report without any material effect on the presentation of cash flows in our previously issued Consolidated Financial Statements. In November 2016, the FASB issued ASU No. 2016-18, Statement of Cash Flows (Topic 230): Restricted Cash Pending adoption In May 2014, the FASB issued ASU No. 2014-09, Revenue from Contracts with Customers (Topic 606) In January 2016, the FASB issued ASU 2016-01, Financial Instruments-Overall (Subtopic 825-10): Recognition and Measurement of Financial Assets and Financial Liabilities In February 2016, the FASB issued ASU 2016-02, Leases (Topic 842)

Summary of Significant Accoun30

Summary of Significant Accounting Policies (Tables)	12 Months Ended
	Dec. 31, 2016
Accounting Policies [Abstract]
Estimated Useful Life of Assets	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 $ 2.9 million in 2014, $1.1 million in 2015 and $ .9 million in 2016. 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

Geographic Information (Tables)

Geographic Information (Tables)	12 Months Ended
	Dec. 31, 2016
Segments Geographical Areas [Abstract]
Net Sales and Property and Equipment by Geographical Information	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, 2014 2015 2016 (In millions) Net sales – point of origin: Germany $ 844.1 $ 690.0 $ 699.8 United States 783.1 657.8 664.2 Canada 252.3 216.9 257.7 Belgium 249.3 198.8 187.4 Norway 256.8 183.5 164.8 Eliminations (733.7 ) (598.2 ) (609.6 ) Total $ 1,651.9 $ 1,348.8 $ 1,364.3 Net sales – point of destination: Europe $ 882.9 $ 700.4 $ 697.6 North America 544.3 421.4 413.2 Other 224.7 227.0 253.5 Total $ 1,651.9 $ 1,348.8 $ 1,364.3 December 31, 2015 2016 (In millions) Identifiable assets – net property and equipment: Germany $ 212.1 $ 208.2 Belgium 80.1 78.6 Norway 69.5 73.3 Canada 53.8 59.3 Other 14.0 14.6 Total $ 429.5 $ 434.0

Accounts and Other Receivables

Accounts and Other Receivables (Tables)	12 Months Ended
	Dec. 31, 2016
Receivables [Abstract]
Accounts and Other Receivables	December 31, 2015 2016 (In millions) Trade receivables $ 194.8 $ 224.8 Recoverable VAT and other receivables 17.8 16.7 Refundable income taxes 6.8 .3 Allowance for doubtful accounts (1.1 ) (.7 ) Total $ 218.3 $ 241.1

Inventories, Net (Tables)

Inventories, Net (Tables)	12 Months Ended
	Dec. 31, 2016
Inventory Disclosure [Abstract]
Schedule of Inventories, Net	December 31, 2015 2016 (In millions) Raw materials $ 75.9 $ 68.7 Work in process 21.1 22.3 Finished products 232.4 195.7 Supplies 57.8 56.8 Total $ 387.2 $ 343.5

Investment in TiO2 Manufactur34

Investment in TiO2 Manufacturing Joint Venture (Tables)	12 Months Ended
	Dec. 31, 2016
Louisiana Pigment Company, L.P.
Investment In Joint Venture [Line Items]
Summary of Net Distributions, Balance Sheets and Income Statements	Years ended December 31, 2014 2015 2016 (In millions) Distributions from LPC $ 48.0 $ 48.2 $ 35.0 Contributions to LPC (37.4 ) (41.7 ) (31.4 ) Net distributions $ 10.6 $ 6.5 $ 3.6 Summary balance sheets of LPC are shown below: December 31, 2015 2016 (In millions) ASSETS Current assets $ 96.2 $ 94.5 Property and equipment, net 110.1 111.6 Total assets $ 206.3 $ 206.1 LIABILITIES AND PARTNERS' EQUITY Other liabilities, primarily current $ 37.8 $ 45.2 Partners' equity 168.5 160.9 Total liabilities and partners' equity $ 206.3 $ 206.1 Summary income statements of LPC are shown below: Years ended December 31, 2014 2015 2016 (In millions) Revenues and other income: Kronos $ 193.1 $ 176.5 $ 157.9 HPA 193.8 162.5 157.5 Total revenues and other income 386.9 339.0 315.4 Cost and expenses: Cost of sales 386.4 338.5 314.9 General and administrative .5 .5 .5 Total costs and expenses 386.9 339.0 315.4 Net income $ - $ - $ -

Marketable Securities (Tables)

Marketable Securities (Tables)	12 Months Ended
	Dec. 31, 2016
Investments Debt And Equity Securities [Abstract]
Marketable Securities	Marketable security Fair value measurement level Market value Cost basis Unrealized gain (loss) (In millions) December 31, 2015: Valhi common stock 1 $ 2.3 $ 3.2 $ (.9 ) NL and CompX common stocks 1 .1 .1 - Total $ 2.4 $ 3.3 $ (.9 ) December 31, 2016: Valhi common stock 1 $ 5.9 $ 3.2 $ 2.7 NL and CompX common stocks 1 .1 .1 - Total $ 6.0 $ 3.3 $ 2.7

Other Noncurrent Assets (Tables

Other Noncurrent Assets (Tables)	12 Months Ended
	Dec. 31, 2016
Deferred Costs Capitalized Prepaid And Other Assets Disclosure [Abstract]
Schedule of Other Noncurrent Assets	December 31, 2015 2016 (In millions) Pension asset $ .4 $ .6 Deferred financing costs, net 1.0 .4 Other 1.7 1.2 Total $ 3.1 $ 2.2

Long-Term Debt (Tables)

Long-Term Debt (Tables)	12 Months Ended
	Dec. 31, 2016
Debt Disclosure [Abstract]
Components of Long Term Debt	December 31, 2015 2016 (In millions) Term loan $ 338.0 $ 335.9 Other 3.0 3.1 Total debt 341.0 339.0 Less current maturities 3.8 3.6 Total long-term debt $ 337.2 $ 335.4
Aggregate Maturities of Long-Term Debt and Other	Aggregate maturities and other – Aggregate maturities of debt at December 31, 2016 are presented in the table below. Year ending December 31, Amount (In 2017 $ 3.6 2018 4.1 2019 4.2 2020 330.6 2021 .7 2022 and thereafter .3 Gross maturities 343.5 Less original issue discount and debt issuance costs 4.5 Total $ 339.0

Accounts Payable and Accrued 38

Accounts Payable and Accrued Liabilities (Tables)	12 Months Ended
	Dec. 31, 2016
Payables And Accruals [Abstract]
Components of Accounts Payable and Accrued Liabilities	December 31, 2015 2016 (In millions) Accounts payable $ 96.1 $ 84.9 Accrued sales discounts and rebates 18.9 20.9 Employee benefits 14.2 17.7 Reserve for uncertain tax positions - 3.3 Interest rate swap contract 3.3 2.9 Accrued workforce reduction costs 5.3 1.2 Other 34.9 27.9 Total $ 172.7 $ 158.8

Employee Benefit Plans (Tables)

Employee Benefit Plans (Tables)	12 Months Ended
	Dec. 31, 2016
CMRT
Composition of Pension Plan Assets	At December 31, 2015 and 2016, 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 benefits plans sponsored by Contran and certain of its affiliates. For 2014, 2015 and 2016, the long-term rate of return assumption for plan assets invested in the CMRT was The CMRT unit value is determined semi-monthly, and the plans have the ability to redeem all or any portion of their investment in the CMRT at any time based on the most recent semi-monthly valuation. However, the plans do not have the right to individual assets held by the CMRT and the CMRT has the sole discretion in determining how to meet any redemption request. For purposes of our plan asset disclosure, we consider the investment in the CMRT as a Level 2 input because (i) the CMRT value is established semi-monthly and the plans have the right to redeem their investment in the CMRT, in part or in whole, at any time based on the most recent value and (ii) observable inputs from Level 1 or Level 2 (or assets not subject to classification in the fair value hierarchy) were used to value approximately 91% and 92% of the assets of the CMRT at December 31, 2015 and 2016, respectively, as noted below. CMRT assets not subject to classification in the fair value hierarchy consist principally of certain investments measured at net asset value per share in accordance with ASC 820-10. The aggregate fair value of all of the CMRT assets, including funds of Contran and its other affiliates that also invest in the CMRT, and supplemental asset mix details of the CMRT are as follows: December 31, 2015 2016 (In millions) CMRT asset value $ 648.8 $ 637.8 CMRT assets comprised of: Assets not subject to fair value hierarchy 30 % 30 % Assets subject to fair value hierarchy: Level 1 54 54 Level 2 7 8 Level 3 9 8 100 % 100 % CMRT asset mix: Domestic equities, principally publicly traded 29 % 31 % International equities, principally publicly traded 22 22 Fixed income securities, principally publicly traded 38 36 Privately managed limited partnerships 5 5 Hedge funds 5 5 Other, primarily cash 1 1 100 % 100 %
Foreign Pension Plans, Defined Benefit
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, 2015 2016 (In millions) Change in projected benefit obligations (PBO): Benefit obligations at beginning of the year $ 648.4 $ 569.7 Service cost 11.2 9.9 Interest cost 14.6 14.7 Participant contributions 1.6 1.5 Actuarial losses (gains) (8.7 ) 33.7 Change in currency exchange rates (76.4 ) (15.0 ) Benefits paid (21.0 ) (20.4 ) Benefit obligations at end of the year 569.7 594.1 Change in plan assets: Fair value of plan assets at beginning of the year 414.8 372.0 Actual return on plan assets 10.6 10.0 Employer contributions 17.1 15.3 Participant contributions 1.6 1.5 Change in currency exchange rates (51.1 ) (6.9 ) Benefits paid (21.0 ) (20.4 ) Fair value of plan assets at end of year 372.0 371.5 Funded status $ (197.7 ) $ (222.6 ) Amounts recognized in the balance sheet: Noncurrent pension asset $ .4 $ .6 Noncurrent accrued pension costs (198.1 ) (223.2 ) Total $ (197.7 ) $ (222.6 ) Accumulated other comprehensive loss: Actuarial losses $ 230.6 $ 257.5 Prior service cost 1.9 1.6 Total $ 232.5 $ 259.1 Accumulated benefit obligations (ABO) $ 545.2 $ 569.5
Components of Net Periodic Benefit Cost (Credit)	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, net transition obligations and recognized actuarial losses for 2014, 2015 and 2016 were recognized as components of our accumulated other comprehensive income (loss) at December 31, 2013, 2014 and 2015, respectively, net of deferred income taxes. Years ended December 31, 2014 2015 2016 (In millions) Net periodic pension cost: Service cost benefits $ 9.9 $ 11.2 $ 9.9 Interest cost on PBO 21.7 14.6 14.7 Expected return on plan assets (20.0 ) (16.6 ) (14.4 ) Settlement gain (.3 ) - - Recognized actuarial losses 10.0 13.6 11.3 Amortization of prior service cost .5 .4 .2 Amortization of net transition obligations .1 - - Total $ 21.9 $ 23.2 $ 21.7
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, 2015 2016 (In millions) Plans for which the ABO exceeds plan assets: PBO $ 518.1 $ 541.5 ABO 498.7 521.8 Fair value of plan assets 321.6 319.5
Key Actuarial Assumptions Used	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, 2015 and 2016 are presented in the table below. December 31, Rate 2015 2016 Discount rate 2.6 % 2.1 % Increase in future compensation levels 2.9 % 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 2014, 2015 and 2016 are presented in the table below. Years ended December 31, Rate 2014 2015 2016 Discount rate 3.8 % 2.5 % 2.6 % Increase in future compensation levels 2.7 % 2.6 % 2.9 % Long-term return on plan assets 5.0 % 4.6 % 3.9 %
United States Pension Plans of US Entity, Defined Benefit
Funded Status of Defined Benefit Plan	The funded status of our U.S. defined benefit pension plan is presented in the table below. December 31, 2015 2016 (In millions) Change in PBO: Benefit obligations at beginning of the year $ 19.8 $ 18.6 Interest cost .8 .8 Actuarial gains (1.0 ) (.6 ) Benefits paid (1.0 ) (1.0 ) Benefit obligations at end of the year 18.6 17.8 Change in plan assets: Fair value of plan assets at beginning of the year 15.5 13.9 Actual return (loss) on plan assets (.7 ) .5 Employer contributions .1 .2 Benefits paid (1.0 ) (1.0 ) Fair value of plan assets at end of year 13.9 13.6 Funded status $ (4.7 ) $ (4.2 ) Amounts recognized in the balance sheet: Accrued pension costs: Current $ (.1 ) $ (.1 ) Noncurrent (4.6 ) (4.1 ) Total $ (4.7 ) $ (4.2 ) Accumulated other comprehensive loss - actuarial losses $ 11.6 $ 11.0 ABO $ 18.6 $ 17.8
Components of Net Periodic Benefit Cost (Credit)	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 2014, 2015 and 2016 were recognized as components of our accumulated other comprehensive income (loss) at December 31, 2013, 2014 and 2015 respectively, net of deferred income taxes. Years ended December 31, 2014 2015 2016 (In millions) Net periodic pension cost (income): Interest cost on PBO $ .8 $ .8 $ .8 Expected return on plan assets (1.2 ) (1.1 ) (1.0 ) Recognized actuarial losses .3 .5 .5 Total $ (.1 ) $ .2 $ .3
Key Actuarial Assumptions Used	The weighted-average rate assumptions used in determining the net periodic pension cost for our U.S. defined benefit pension plan for 2014, 2015 and 2016 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 2014 2015 2016 Discount rate 4.5 % 3.8 % 4.1 % Long-term return on plan assets 7.5 % 7.5 % 7.5 %
OPEB
Benefit Payments	Postretirement benefits other than pensions (OPEB) – We provide certain health care and life insurance benefits for eligible Canadian and U.S. retired employees. Certain of our Canadian employees may become eligible for such postretirement health care and life insurance benefits if they reach retirement age while working for us. In the U.S., employees who retired after 1998 are not entitled to any such benefits. The majority of all retirees are required to contribute a portion of the cost of their benefits and certain current and future retirees are eligible for reduced health care benefits at age 65. We have no OPEB plan assets, rather, we fund medical claims as they are paid. Contributions to our OPEB plans to cover benefit payments are expected to be the equivalent of: Years ending December 31, Amount (In millions) 2017 $ .4 2018 .4 2019 .4 2020 .4 2021 .4 Next 5 years 2.2
Funded Status of Defined Benefit Plan	The funded status of our OPEB plans is presented in the table below: December 31, 2015 2016 (In millions) Change in accumulated OPEB obligations: Obligations at beginning of the year $ 8.5 $ 7.0 Service cost .1 .1 Interest cost .3 .3 Actuarial gains (.2 ) (.1 ) Change in currency exchange rates (1.3 ) .2 Benefits paid from employer contributions (.4 ) (.3 ) Obligations at end of the year 7.0 7.2 Fair value of plan assets - - Funded status $ (7.0 ) $ (7.2 ) Amounts recognized in the balance sheet: Current accrued OPEB costs $ (.3 ) $ (.3 ) Noncurrent accrued OPEB costs (6.7 ) (6.9 ) Total $ (7.0 ) $ (7.2 ) Accumulated other comprehensive income: Net actuarial losses $ 3.1 $ 2.9 Prior service credit (6.2 ) (5.5 ) Total $ (3.1 ) $ (2.6 )
Components of Net Periodic Benefit Cost (Credit)	The components of our periodic OPEB costs are presented in the table below. The amounts shown below for amortization of prior service credit and recognized actuarial losses for 2014, 2015 and 2016 were recognized as components of our accumulated other comprehensive income (loss) at December 31, 2013, 2014 and 2015, respectively, net of deferred income taxes. Years ended December 31, 2014 2015 2016 (In millions) Net periodic OPEB cost (benefit): Service cost $ .1 $ .1 $ .1 Interest cost .4 .3 .3 Amortization of prior service credit (.9 ) (.8 ) (.8 ) Recognized actuarial losses .2 .3 .2 Total $ (.2 ) $ (.1 ) $ (.2 )
Key Actuarial Assumptions Used	A summary of our key actuarial assumptions used to determine the net benefit obligation as of December 31, 2015 and 2016 are presented in the table below. The weighted average discount rate was determined using the projected benefit obligation as of such dates. The impact of assumed increases in future compensation levels does not have a material effect on the actuarial present value of the benefit obligation as substantially all of such benefits relate solely to eligible retirees, for which compensation is not applicable. 2015 2016 Healthcare inflation: Initial rate 7.0 % 7.0 % Ultimate rate 5.0 % 5.0 % Year of ultimate rate achievement 2021 2021 Weighted average discount rate 3.9 % 3.5 %
Changes in Benefit Obligations Recognized in Accumulated Other Comprehensive Income (Loss)	The table below details the changes in benefit obligations recognized in accumulated other comprehensive income (loss) during 2014, 2015 and 2016. Years ended December 31, 2014 2015 2016 (In millions) Changes in benefit obligations recognized in other comprehensive income (loss): Current year: Net actuarial gain (loss) $ (.8 ) $ .2 $ .1 Amortization of unrecognized: Net actuarial loss .2 .3 .2 Prior service cost (.9 ) (.8 ) (.8 ) Total $ (1.5 ) $ (.3 ) $ (.5 )
Defined Benefit Pension Plans
Benefit Payments	We expect to contribute the equivalent of approximately $14.8 million to all of our defined benefit pension plans during 2017. Benefit payments to plan participants out of plan assets are expected to be the equivalent of: Years ending December 31, Amount (In millions) 2017 $ 20.1 2018 20.4 2019 20.9 2020 22.1 2021 22.6 Next 5 years 124.4
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 2014, 2015 and 2016. Years ended December 31, 2014 2015 2016 (In millions) Changes in plan assets and benefit obligations recognized in other comprehensive income (loss): Current year: Net actuarial gain (loss) $ (103.9 ) $ 2.7 $ (38.0 ) Settlements (.3 ) - - Amortization of unrecognized: Net actuarial losses 10.3 14.1 11.8 Prior service cost .5 .4 .2 Net transition obligations .1 - - Total $ (93.3 ) $ 17.2 $ (26.0 )
Composition of Pension Plan Assets	The composition of our December 31, 2015 and 2016 pension plan assets by asset category and fair value level is shown in the table below. Fair Value Measurements at December 31, 2015 Total Quoted prices in active markets (Level 1) Significant other observable inputs (Level 2) Significant unobservable inputs (Level 3) (In millions) Germany $ 223.1 $ - $ - $ 223.1 Canada: Local currency equities 9.6 9.6 - - Non local currency equities 23.3 23.3 - - Local currency fixed income 50.6 50.6 - - Global mutual fund 6.8 6.8 - - Cash and other .5 .5 - - Norway: Local currency equities 2.0 2.0 - - Non local currency equities 3.6 3.6 - - Local currency fixed income 24.5 24.5 - - Non local currency fixed income 4.7 4.7 - - Real estate 4.2 - - 4.2 Cash and other 7.9 6.7 - 1.2 U.S. CMRT 13.9 - 13.9 - Other 11.2 3.5 - 7.7 Total $ 385.9 $ 135.8 $ 13.9 $ 236.2 Fair Value Measurements at December 31, 2016 Total Quoted prices in active markets (Level 1) Significant other observable inputs (Level 2) Significant unobservable inputs (Level 3) (In millions) Germany $ 217.0 $ - $ - $ 217.0 Canada: Local currency equities 14.8 14.8 - - Non local currency equities 19.7 19.7 - - Local currency fixed income 59.5 59.5 - - Cash and other .4 .4 - - Norway: Local currency equities 1.6 1.6 - - Non local currency equities 4.1 4.1 - - Local currency fixed income 23.2 23.2 - - Non local currency fixed income 5.4 5.4 - - Real estate 4.2 - - 4.2 Cash and other 9.9 8.8 - 1.1 U.S. CMRT 13.7 - 13.7 - Other 11.7 3.5 - 8.2 Total $ 385.2 $ 141.0 $ 13.7 $ 230.5
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, 2015 2016 (In millions) Fair value at beginning of year $ 254.1 $ 236.2 Gain on assets held at end of year 6.5 4.1 Gain on assets sold during the year .3 - Assets purchased 13.7 13.1 Assets sold (12.4 ) (13.4 ) Currency exchange rate fluctuations (26.0 ) (9.5 ) Fair value at end of year $ 236.2 $ 230.5

Other Noncurrent Liabilities (T

Other Noncurrent Liabilities (Tables)	12 Months Ended
	Dec. 31, 2016
Other Liabilities Disclosure [Abstract]
Components of Other Noncurrent Liabilities	December 31, 2015 2016 (In millions) Reserve for uncertain tax positions $ 11.8 $ 7.3 Employee benefits 7.5 7.8 Interest rate swap contract .2 .2 Other 4.9 7.1 Total $ 24.4 $ 22.4

Restructuring Costs (Tables)

Restructuring Costs (Tables)	12 Months Ended
	Dec. 31, 2016
Workforce Reduction
Summary of Activity in Accrued Workforce Reduction	The table below presents a summary of the activity in our accrued workforce reduction costs during 2015 and 2016: Years ended December 31, 2015 2016 (In millions) Balance at beginning of the year $ - $ 5.6 Workforce reduction costs accrued 21.7 - Workforce reduction costs paid (15.9 ) (4.1 ) Currency translation adjustments, net (.2 ) (.1 ) Balance at end of the year $ 5.6 $ 1.4 Amounts recognized in the balance sheet: Current liability $ 5.3 $ 1.2 Noncurrent liability .3 .2 $ 5.6 $ 1.4

Income Taxes (Tables)

Income Taxes (Tables)	12 Months Ended
	Dec. 31, 2016
Income Tax Disclosure [Abstract]
Components of Income Taxes and Comprehensive Provision for Income Taxes Allocation	Years ended December 31, 2014 2015 2016 (In millions) Pre-tax income (loss): U.S. $ 59.2 $ 5.5 $ 11.5 Non-U.S. 74.5 (36.3 ) 49.7 Total $ 133.7 $ (30.8 ) $ 61.2 Expected tax expense (benefit), at U.S. federal statutory income tax rate of 35% $ 46.8 $ (10.8 ) $ 21.4 Non-U.S. tax rates (4.2 ) .5 (4.3 ) Incremental net tax (benefit) on earnings and losses of non-U.S. companies (3.7 ) (8.7 ) 2.2 Valuation allowance - 159.0 (2.2 ) U.S. - Canada APA - - (3.4 ) Adjustment to the reserve for uncertain tax positions, net (5.1 ) .7 2.4 Nondeductible expenses 1.9 2.1 1.5 U.S. state income taxes and other, net (1.2 ) - .3 Provision for income taxes $ 34.5 $ 142.8 $ 17.9 Components of income tax expense: Currently payable: U.S. federal and state $ 1.9 $ .3 $ - Non-U.S. 15.2 3.3 9.5 17.1 3.6 9.5 Deferred income taxes (benefit): U.S. federal and state 10.0 (6.4 ) 4.3 Non-U.S. 7.4 145.6 4.1 17.4 139.2 8.4 Provision for income taxes $ 34.5 $ 142.8 $ 17.9 Years ended December 31, 2014 2015 2016 (In millions) Comprehensive provision for income taxes (benefit) allocable to: Net income $ 34.5 $ 142.8 $ 17.9 Other comprehensive income (loss): Currency translation (16.9 ) - - Marketable securities (6.7 ) 1.1 1.3 Pension plans (30.1 ) 1.5 (.8 ) OPEB plans (.4 ) (.1 ) (.2 ) Interest rate swap - (1.3 ) .2 Total $ (19.6 ) $ 144.0 $ 18.4
Components of Net Deferred Income Taxes	The components of our net deferred income taxes at December 31, 2015 and 2016 are summarized in the following table. December 31, 2015 2016 Assets Liabilities Assets Liabilities (In millions) Tax effect of temporary differences related to: Inventories $ 3.2 $ (3.5 ) $ 3.7 $ (3.7 ) Property and equipment - (59.3 ) - (58.1 ) Accrued OPEB costs 2.0 - 2.0 - Accrued pension cost 39.4 - 48.3 - Currency revaluation on intercompany debt 18.6 - 24.0 - Other accrued liabilities and deductible differences 19.4 - 12.6 - Other taxable differences - (.5 ) - (.4 ) Tax on unremitted earnings of non-U.S. subsidiaries - (1.9 ) - (2.9 ) Tax loss and tax credit carryforwards 157.4 - 145.5 - Valuation allowance (168.9 ) - (173.4 ) - Adjusted gross deferred tax assets (liabilities) 71.1 (65.2 ) 62.7 (65.1 ) Netting by tax jurisdiction (57.1 ) 57.1 (54.6 ) 54.6 Net noncurrent deferred tax asset (liability) $ 14.0 $ (8.1 ) $ 8.1 $ (10.5 )
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 2014, 2015 and 2016: Years ended December 31, 2014 2015 2016 (In millions) Changes in unrecognized tax benefits: Unrecognized tax benefits at beginning of year $ 15.9 $ 10.4 $ 9.7 Net increase (decrease): Tax positions taken in prior periods (5.4 ) (.3 ) (.1 ) Tax positions taken in current period 1.1 1.1 2.5 Lapse due to applicable statute of limitations - (.2 ) (.2 ) Settlements with taxing authorities - - (2.3 ) Change in currency exchange rates (1.2 ) (1.3 ) .3 Unrecognized tax benefits at end of year $ 10.4 $ 9.7 $ 9.9

Stockholders' Equity (Tables)

Stockholders' Equity (Tables)	12 Months Ended
	Dec. 31, 2016
Equity [Abstract]
Schedule of Changes in Accumulated Other Comprehensive Loss	Accumulated other comprehensive loss - Changes in accumulated other comprehensive loss for 2014, 2015 and 2016 are presented in the table below. Years ended December 31, 2014 2015 2016 (In millions) Accumulated other comprehensive loss, net of tax: Currency translation: Balance at beginning of year $ (56.8 ) $ (159.8 ) $ (252.0 ) Other comprehensive loss (103.0 ) (92.2 ) (17.6 ) Balance at end of year $ (159.8 ) $ (252.0 ) $ (269.6 ) Marketable securities: Balance at beginning of year $ 10.8 $ (2.9 ) $ (.6 ) Other comprehensive income (loss): Unrealized gains (losses) arising during the year (13.7 ) (6.5 ) 2.4 Less reclassification adjustment for amounts included in realized loss - 8.8 - Balance at end of year $ (2.9 ) $ (.6 ) $ 1.8 Defined benefit pension plans: Balance at beginning of year $ (109.4 ) $ (175.4 ) $ (159.2 ) Other comprehensive income (loss): Amortization of prior service cost and net losses included in net periodic pension cost 7.2 10.0 8.5 Net actuarial gain (loss) arising during year (73.2 ) 6.2 (34.1 ) Balance at end of year $ (175.4 ) $ (159.2 ) $ (184.8 ) OPEB plans: Balance at beginning of year $ 3.4 $ 2.3 $ 2.1 Other comprehensive (income) loss: Amortization of prior service credit and net losses included in net periodic OPEB cost (.5 ) (.4 ) (.4 ) Net actuarial gain (loss) arising during year (.6 ) .2 .1 Balance at end of year $ 2.3 $ 2.1 $ 1.8 Interest rate swap: Balance at beginning of year $ - $ - $ (2.3 ) Other comprehensive loss: Unrealized losses arising during the year - (2.9 ) (2.0 ) Less reclassification adjustment for amounts included in interest expense - .6 2.3 Balance at end of year $ - $ (2.3 ) $ (2.0 ) Total accumulated other comprehensive loss: Balance at beginning of year $ (152.0 ) $ (335.8 ) $ (412.0 ) Other comprehensive loss (183.8 ) (76.2 ) (40.8 ) Balance at end of year $ (335.8 ) $ (412.0 ) $ (452.8 )

Related Party Transactions (Tab

Related Party Transactions (Tables)	12 Months Ended
	Dec. 31, 2016
Related Party Transactions [Abstract]
Summary of Current Receivables from and Payables to Affiliates	Current receivables from and payables to affiliates are summarized in the table below. December 31, 2015 2016 (In millions) Current receivable from affiliate: Income taxes receivable from Valhi $ - $ .7 Other 2.5 2.8 $ 2.5 $ 3.5 Current payables to affiliates: LPC $ 19.4 $ 14.7 Income taxes payable to Valhi .1 - Total $ 19.5 $ 14.7

Commitments and Contingencies (

Commitments and Contingencies (Tables)	12 Months Ended
	Dec. 31, 2016
Commitments And Contingencies Disclosure [Abstract]
Summary of Approximate Percentage of TiO2 Sales by Volume	The table below shows the approximate percentage of our TiO 2 2014 2015 2016 Europe 50 % 52 % 51 % North America 33 % 29 % 29 %
Summary of Future Minimum Payments Under Non-cancellable Operating Leases	At December 31, 2016, 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) 2017 $ 10.8 2018 6.3 2019 5.0 2020 4.1 2021 3.5 2022 and thereafter 23.3 Total $ 53.0

Financial Instruments (Tables)

Financial Instruments (Tables)	12 Months Ended
	Dec. 31, 2016
Fair Value Disclosures [Abstract]
Valuation of Financial Instruments Recorded on Fair Value Basis	The following table summarizes the valuation of our financial instruments recorded on a fair value basis as of December 31, 2015 and 2016: Fair value measurements Total Quoted in active markets (Level 1) Significant other observable inputs (Level 2) Significant unobservable inputs (Level 3) (In millions) Asset (liability) December 31, 2015: Currency forward contracts $ (1.2 ) $ (1.2 ) $ - $ - Interest rate swap contract (3.5 ) - (3.5 ) - Noncurrent marketable securities (See Note 6) 2.4 2.4 - - December 31, 2016: Interest rate swap contract $ (3.1 ) $ - $ (3.1 ) $ - Noncurrent marketable securities (See Note 6) 6.0 6.0 - -
Financial Instruments not Carried at Fair Value but which Require Fair Value Disclosure	The following table presents the financial instruments that are not carried at fair value but which require fair value disclosure as of December 31, 2015 and 2016. December 31, 2015 December 31, 2016 Carrying amount Fair value Carrying amount Fair value (In millions) Cash, cash equivalents and restricted cash $ 94.3 $ 94.3 $ 52.3 $ 52.3 Variable rate term loan 338.0 309.5 335.9 334.6 Common stockholders' equity 461.9 653.6 395.0 1,383.8

Quarterly Results of Operatio47

Quarterly Results of Operations (Tables)	12 Months Ended
	Dec. 31, 2016
Selected Quarterly Financial Information [Abstract]
Quarterly Results of Operations	Quarter ended March June September December (In millions, except per share data) Year ended December 31, 2015 Net sales $ 365.1 $ 360.2 $ 336.5 $ 287.0 Gross margin 77.4 46.5 43.2 25.2 Net income (loss) 18.4 (159.8 ) (11.8 ) (20.4 ) Basic and diluted income (loss) per share $ .16 $ (1.38 ) $ (.10 ) $ (.18 ) Year ended December 31, 2016 Net sales $ 318.4 $ 356.1 $ 356.1 $ 333.7 Gross margin 40.4 55.5 75.5 85.6 Net income (loss) (3.8 ) 1.7 22.2 23.2 Basic and diluted income (loss) per share $ (.03 ) $ .01 $ .19 $ .20

Summary of Significant Accoun48

Summary of Significant Accounting Policies - Additional Information (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Organization And Basis Of Presentation [Line Items]
Capitalized interest costs	$ 0.9	$ 1.1	$ 2.9
Income taxes paid, net	6.6	1.4	17.5
Earnings of non-U.S. subsidiaries subject to permanent reinvestment plans aggregated	660
Shipping and handling costs	90	87	95
Research, development and certain sales technical support costs	$ 13	16	19
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]
Ownership percentage in subsidiary	50.00%
Ownership percentage in company	83.00%
Income taxes paid, net	$ 0.8		$ 8.2
Income tax refunds, net		$ 3.5
NL Industries Inc.
Organization And Basis Of Presentation [Line Items]
Ownership percentage	30.00%
Contran
Organization And Basis Of Presentation [Line Items]
Ownership percentage of parent company held by related party	93.00%
Controlling interest description	Consequently, Ms. Simmons and Ms. Connelly may be deemed to control Contran, Valhi, NL and us.

Summary of Significant Accoun49

Summary of Significant Accounting Policies - Estimated Useful Lives of Assets (Detail)	12 Months Ended
	Dec. 31, 2016
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 - Additi

Geographic Information - Additional Information (Detail) - USD ($) $ in Millions	Dec. 31, 2016	Dec. 31, 2015
Non-U.S. Subsidiaries
Geographic Information [Line Items]
Net assets of non-US subsidiaries	$ 62	$ 123

Geographic Information - Net Sa

Geographic Information - Net Sales and Property and Equipment by Geographical Information (Detail) - USD ($) $ in Millions	3 Months Ended								12 Months Ended
	Dec. 31, 2016	Sep. 30, 2016	Jun. 30, 2016	Mar. 31, 2016	Dec. 31, 2015	Sep. 30, 2015	Jun. 30, 2015	Mar. 31, 2015	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Revenues From External Customers And Long Lived Assets [Line Items]
Net sales	$ 333.7	$ 356.1	$ 356.1	$ 318.4	$ 287	$ 336.5	$ 360.2	$ 365.1	$ 1,364.3	$ 1,348.8	$ 1,651.9
Net property and equipment	434				429.5				434	429.5
Germany
Revenues From External Customers And Long Lived Assets [Line Items]
Net property and equipment	208.2				212.1				208.2	212.1
Canada
Revenues From External Customers And Long Lived Assets [Line Items]
Net property and equipment	59.3				53.8				59.3	53.8
Belgium
Revenues From External Customers And Long Lived Assets [Line Items]
Net property and equipment	78.6				80.1				78.6	80.1
Norway
Revenues From External Customers And Long Lived Assets [Line Items]
Net property and equipment	73.3				69.5				73.3	69.5
Other
Revenues From External Customers And Long Lived Assets [Line Items]
Net property and equipment	$ 14.6				$ 14				14.6	14
Point of origin | Reportable Geographical Components | Germany
Revenues From External Customers And Long Lived Assets [Line Items]
Net sales									699.8	690	844.1
Point of origin | Reportable Geographical Components | United States
Revenues From External Customers And Long Lived Assets [Line Items]
Net sales									664.2	657.8	783.1
Point of origin | Reportable Geographical Components | Canada
Revenues From External Customers And Long Lived Assets [Line Items]
Net sales									257.7	216.9	252.3
Point of origin | Reportable Geographical Components | Belgium
Revenues From External Customers And Long Lived Assets [Line Items]
Net sales									187.4	198.8	249.3
Point of origin | Reportable Geographical Components | Norway
Revenues From External Customers And Long Lived Assets [Line Items]
Net sales									164.8	183.5	256.8
Point of origin | Eliminations
Revenues From External Customers And Long Lived Assets [Line Items]
Net sales									(609.6)	(598.2)	(733.7)
Point of destination | Europe
Revenues From External Customers And Long Lived Assets [Line Items]
Net sales									697.6	700.4	882.9
Point of destination | North America
Revenues From External Customers And Long Lived Assets [Line Items]
Net sales									413.2	421.4	544.3
Point of destination | Other
Revenues From External Customers And Long Lived Assets [Line Items]
Net sales									$ 253.5	$ 227	$ 224.7

Accounts and Other Receivable52

Accounts and Other Receivables - Accounts and Other Receivables (Detail) - USD ($) $ in Millions	Dec. 31, 2016	Dec. 31, 2015
Accounts Notes And Loans Receivable [Line Items]
Allowance for doubtful accounts	$ (0.7)	$ (1.1)
Total	241.1	218.3
Trade receivables
Accounts Notes And Loans Receivable [Line Items]
Accounts and other receivables	224.8	194.8
Recoverable VAT and other receivables
Accounts Notes And Loans Receivable [Line Items]
Accounts and other receivables	16.7	17.8
Refundable income taxes
Accounts Notes And Loans Receivable [Line Items]
Refundable income taxes	$ 0.3	$ 6.8

Inventories, Net - Schedule of

Inventories, Net - Schedule of Inventories, Net (Detail) - USD ($) $ in Millions	Dec. 31, 2016	Dec. 31, 2015
Inventory Disclosure [Abstract]
Raw materials	$ 68.7	$ 75.9
Work in process	22.3	21.1
Finished products	195.7	232.4
Supplies	56.8	57.8
Total	$ 343.5	$ 387.2

Investment in TiO2 Manufactur54

Investment in TiO2 Manufacturing Joint Venture - Additional Information (Detail) - USD ($)	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015
Investment In Joint Venture [Line Items]
Equity earnings of LPC	$ 0
Louisiana Pigment Company, L.P.
Investment In Joint Venture [Line Items]
Equity interest in LPC	50.00%
Products purchased from plant	50.00%	52.00%
Huntsman P&A Investments LLC
Investment In Joint Venture [Line Items]
Equity interest in LPC	50.00%

Investment in TiO2 Manufactur55

Investment in TiO2 Manufacturing Joint Venture - Components of Net Distributions from LPC (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Investment In Joint Venture [Line Items]
Net distributions	$ 3.6	$ 6.5	$ 10.6
Louisiana Pigment Company, L.P.
Investment In Joint Venture [Line Items]
Distributions from LPC	35	48.2	48
Contributions to LPC	(31.4)	(41.7)	(37.4)
Net distributions	$ 3.6	$ 6.5	$ 10.6

Investment in TiO2 Manufactur56

Investment in TiO2 Manufacturing Joint Venture - Summary of Balance Sheets of LPC (Detail) - Louisiana Pigment Company, L.P. - USD ($) $ in Millions	Dec. 31, 2016	Dec. 31, 2015
ASSETS
Current assets	$ 94.5	$ 96.2
Property and equipment, net	111.6	110.1
Total assets	206.1	206.3
LIABILITIES AND PARTNERS' EQUITY
Other liabilities, primarily current	45.2	37.8
Partners' equity	160.9	168.5
Total liabilities and partners' equity	$ 206.1	$ 206.3

Investment in TiO2 Manufactur57

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, 2016	Dec. 31, 2015	Dec. 31, 2014
Revenues and other income:
Total revenues and other income	$ 315.4	$ 339	$ 386.9
Cost and expenses:
Cost of sales	314.9	338.5	386.4
General and administrative	0.5	0.5	0.5
Total costs and expenses	315.4	339	386.9
Kronos
Revenues and other income:
Total revenues and other income	157.9	176.5	193.1
HPA
Revenues and other income:
Total revenues and other income	$ 157.5	$ 162.5	$ 193.8

Marketable Securities - Classif

Marketable Securities - Classification of Marketable Securities (Detail) - USD ($) $ in Millions	Dec. 31, 2016	Dec. 31, 2015
Schedule Of Available For Sale Securities [Line Items]
Market value	$ 6	$ 2.4
Cost basis	3.3	3.3
Unrealized gain (loss)	2.7	(0.9)
Level 1 | Common stock | Valhi
Schedule Of Available For Sale Securities [Line Items]
Market value	5.9	2.3
Cost basis	3.2	3.2
Unrealized gain (loss)	2.7	(0.9)
Level 1 | Common stock | NL And CompX
Schedule Of Available For Sale Securities [Line Items]
Market value	0.1	0.1
Cost basis	$ 0.1	$ 0.1

Marketable Securities - Additio

Marketable Securities - Additional Information (Detail) - USD ($) $ / shares in Units, shares in Millions, $ in Millions	3 Months Ended
	Sep. 30, 2015	Dec. 31, 2016	Dec. 31, 2015
Schedule Of Available For Sale Securities [Line Items]
Pre-tax other than temporary impairment charge to write down	$ 12
Valhi Inc
Schedule Of Available For Sale Securities [Line Items]
Pre-tax other than temporary impairment charge to write down	$ 12
Valhi Inc | Common stock
Schedule Of Available For Sale Securities [Line Items]
Investments in publicly-traded shares	1.7	1.7	1.7
Quoted market price of per share		$ 3.46	$ 1.34

Other Noncurrent Assets - Sched

Other Noncurrent Assets - Schedule of Other Noncurrent Assets (Detail) - USD ($) $ in Millions	Dec. 31, 2016	Dec. 31, 2015
Disclosure Other Non Current Assets Schedule Of Other Non Current Assets [Abstract]
Pension asset	$ 0.6	$ 0.4
Deferred financing costs, net	0.4	1
Other	1.2	1.7
Total	$ 2.2	$ 3.1

Long-Term Debt - Components of

Long-Term Debt - Components of Long-Term Debt (Detail) - USD ($) $ in Millions	Dec. 31, 2016	Dec. 31, 2015
Debt Disclosure [Abstract]
Term loan	$ 335.9	$ 338
Other	3.1	3
Total debt	339	341
Less current maturities	3.6	3.8
Total long-term debt	$ 335.4	$ 337.2

Long-Term Debt - Term Loan - Ad

Long-Term Debt - Term Loan - Additional Information (Detail) - USD ($)	1 Months Ended		12 Months Ended
	May 31, 2015	Feb. 28, 2014	Dec. 31, 2016	Dec. 31, 2015
New Term Loan
Debt Instrument [Line Items]
Debt instrument face amount		$ 350,000,000
Principal amount percentage of loan raised		99.50%
Aggregate amount of loan issued		$ 348,300,000
Minimum LIBOR rate		1.00%
Quarterly principal repayments		$ 875,000
Commencement date of quarterly principal repayments		Jun. 30, 2014
Debt instrument maturity date		Feb. 29, 2020
Minimum amount of debt default for using customary default provisions		$ 50,000,000
New Term Loan | U.S. wholly-owned subsidiaries
Debt Instrument [Line Items]
Term Loan Collateralized Priority		100.00%
New Term Loan | Canadian First-Tier European Subsidiaries
Debt Instrument [Line Items]
Term Loan Collateralized Priority		65.00%
New Term Loan | Kronos International, Inc
Debt Instrument [Line Items]
Loan pledged as collateral from wholly-owned subsidiary		$ 395,700,000
New Term Loan | London Interbank Offered Rate (LIBOR)
Debt Instrument [Line Items]
Debt instrument basis spread on variable rate		3.00%
New Term Loan | Base Rate
Debt Instrument [Line Items]
Debt instrument basis spread on variable rate		2.00%
New Term Loan | Contran
Debt Instrument [Line Items]
Payment of Principal Amount		$ 170,000,000
Term Loan | 2014 Term Loan, Amended 2015
Debt Instrument [Line Items]
Fee in connection with amendment	$ 750,000
Percentage of average interest rate, during period			4.00%
Percentage of average interest rate, at period end			4.00%
Unamortized discount			$ 900,000	$ 1,200,000
Debt Issuance Cost			$ 3,600,000	$ 4,700,000
Term Loan | London Interbank Offered Rate (LIBOR) | 2014 Term Loan
Debt Instrument [Line Items]
Debt instrument basis spread on variable rate		3.75%
Term Loan | Base Rate | 2014 Term Loan
Debt Instrument [Line Items]
Debt instrument basis spread on variable rate		2.75%

Long-Term Debt - Revolving Cred

Long-Term Debt - Revolving Credit Facilities - Additional Information (Detail)	1 Months Ended		12 Months Ended
	Jan. 31, 2017	Feb. 28, 2014	Dec. 31, 2016USD ($)	Dec. 31, 2015USD ($)	Dec. 31, 2016EUR (€)
2014 Term Loan
Line Of Credit Facility [Line Items]
Debt instrument maturity date		Feb. 29, 2020
Base Rate | 2014 Term Loan
Line Of Credit Facility [Line Items]
Debt instrument basis spread on variable rate		2.00%
London Interbank Offered Rate (LIBOR) | 2014 Term Loan
Line Of Credit Facility [Line Items]
Debt instrument basis spread on variable rate		3.00%
Revolving North American Credit Facility | Subsequent Event
Line Of Credit Facility [Line Items]
Line of credit maturity, description	As amended in January 2017, the facility matures the earlier of (i) January 30, 2022 or (ii) 90 days prior to the maturity date of our term loan (or the maturity date of any new term loan constituting a permitted refinancing of the existing term loan). Based on the February 2020 maturity date of our existing term loan, the maturity date of the North American credit facility is currently November 2019.
Revolving North American Credit Facility | Subsequent Event | Maturity Date Option 1
Line Of Credit Facility [Line Items]
Line of credit, maturity date	Jan. 30, 2022
Revolving North American Credit Facility | Subsequent Event | Maturity Date Option 2
Line Of Credit Facility [Line Items]
Maturity date of term loan	90 days
Line of Credit Maturity	2019-11
Letter Of Credit
Line Of Credit Facility [Line Items]
Sublimit maximum borrowing capacity			$ 15,000,000
Revolving European Credit Facility
Line Of Credit Facility [Line Items]
Maximum borrowing capacity | €					€ 120,000,000
Line of Credit Maturity			2017-09
Borrowings under credit facility during the period			$ 0	$ 0
Repayments of Lines of Credit			0	0
Amount available for Borrowing			58,500,000		€ 55,800,000
Outstanding borrowings under this credit facility			$ 0
Percentage of borrowings available under credit facility			47.00%		47.00%
Revolving European Credit Facility | London Interbank Offered Rate (LIBOR)
Line Of Credit Facility [Line Items]
Debt instrument basis spread on variable rate			1.90%
Revolving North American credit facility
Line Of Credit Facility [Line Items]
Maximum borrowing capacity			$ 125,000,000
Fixed charge coverage ratio, minimum value			110.00%
Borrowings under credit facility during the period			$ 266,200,000	0
Repayments of Lines of Credit			266,200,000	$ 0
Amount available for Borrowing			74,800,000
Revolving North American credit facility | Canadian Subsidiary Revolving Borrowings Maximum
Line Of Credit Facility [Line Items]
Maximum borrowing capacity			$ 25,000,000
Minimum | Revolving North American credit facility | Base Rate
Line Of Credit Facility [Line Items]
Debt instrument basis spread on variable rate			0.50%
Minimum | Revolving North American credit facility | London Interbank Offered Rate (LIBOR)
Line Of Credit Facility [Line Items]
Debt instrument basis spread on variable rate			1.50%
Maximum | Revolving North American credit facility | Base Rate
Line Of Credit Facility [Line Items]
Debt instrument basis spread on variable rate			1.00%
Maximum | Revolving North American credit facility | London Interbank Offered Rate (LIBOR)
Line Of Credit Facility [Line Items]
Debt instrument basis spread on variable rate			2.00%

Long-Term Debt - Aggregate Matu

Long-Term Debt - Aggregate Maturities of Long-Term Debt and Other (Detail) - USD ($) $ in Millions	Dec. 31, 2016	Dec. 31, 2015
Long Term Debt By Maturity [Abstract]
2,017	$ 3.6
2,018	4.1
2,019	4.2
2,020	330.6
2,021	0.7
2022 and thereafter	0.3
Gross maturities	343.5
Less original issue discount and debt issuance costs	4.5
Total debt	$ 339	$ 341

Accounts Payable and Accrued 65

Accounts Payable and Accrued Liabilities - Components of Accounts Payable and Accrued Liabilities (Detail) - USD ($) $ in Millions	Dec. 31, 2016	Dec. 31, 2015
Payables And Accruals [Abstract]
Accounts payable	$ 84.9	$ 96.1
Accrued sales discounts and rebates	20.9	18.9
Employee benefits	17.7	14.2
Reserve for uncertain tax positions	3.3
Interest rate swap contract	2.9	3.3
Accrued workforce reduction costs	1.2	5.3
Other	27.9	34.9
Total	$ 158.8	$ 172.7

Employee Benefit Plans - Additi

Employee Benefit Plans - Additional Information (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Defined Benefit Plan Disclosure [Line Items]
Defined contribution benefit plan expense	$ 2.8	$ 2.7	$ 2.6
Defined Benefit Pension Plans
Defined Benefit Plan Disclosure [Line Items]
Expected contributions next fiscal year	14.8
Unrecognized actuarial losses to be recognized in next fiscal year	12.8
Unrecognized prior service cost to be recognized in next fiscal year	$ 0.2
United States Pension Plans of US Entity, Defined Benefit
Defined Benefit Plan Disclosure [Line Items]
Discount rate	3.90%	4.10%
Expected long-term rate of return	7.50%	7.50%	7.50%
United States Pension Plans of US Entity, Defined Benefit | CMRT
Defined Benefit Plan Disclosure [Line Items]
Expected long-term rate of return	7.50%	7.50%	7.50%
United States Pension Plans of US Entity, Defined Benefit | CMRT | Level 1 and Level 2
Defined Benefit Plan Disclosure [Line Items]
Percentage of fair value of asset	92.00%	91.00%
Foreign Pension Plans, Defined Benefit
Defined Benefit Plan Disclosure [Line Items]
Discount rate	2.10%	2.60%
Expected long-term rate of return	3.90%	4.60%	5.00%
Foreign Pension Plans, Defined Benefit | Equity Securities | Canada
Defined Benefit Plan Disclosure [Line Items]
Target asset allocation	35.00%
Average basis points of long-term rate of return on investment	125 basis points above the applicable equity or fixed income index
Foreign Pension Plans, Defined Benefit | Equity Securities | Norway
Defined Benefit Plan Disclosure [Line Items]
Expected long-term rate of return	7.00%
Target asset allocation	11.00%
Foreign Pension Plans, Defined Benefit | Debt Securities | Canada
Defined Benefit Plan Disclosure [Line Items]
Target asset allocation	65.00%
Average basis points of long-term rate of return on investment	125 basis points above the applicable equity or fixed income index
Foreign Pension Plans, Defined Benefit | Debt Securities | Norway
Defined Benefit Plan Disclosure [Line Items]
Expected long-term rate of return	3.00%
Target asset allocation	79.00%
Foreign Pension Plans, Defined Benefit | Other Investment Securities And Cash | Canada
Defined Benefit Plan Disclosure [Line Items]
Average basis points of long-term rate of return on investment	125 basis points above the applicable equity or fixed income index
Foreign Pension Plans, Defined Benefit | Other Investment Securities And Cash | Norway
Defined Benefit Plan Disclosure [Line Items]
Expected long-term rate of return	7.00%
Foreign Pension Plans, Defined Benefit | Real Estate | Norway
Defined Benefit Plan Disclosure [Line Items]
Expected long-term rate of return	5.00%
Target asset allocation	7.00%
Foreign Pension Plans, Defined Benefit | Real Estate And Other Investments | Norway
Defined Benefit Plan Disclosure [Line Items]
Actual plan asset allocation	11.00%

Employee Benefit Plans - Benefi

Employee Benefit Plans - Benefit Payments (Detail) $ in Millions	Dec. 31, 2016USD ($)
Defined Benefit Pension Plans
Defined Benefit Plan Disclosure [Line Items]
2,017	$ 20.1
2,018	20.4
2,019	20.9
2,020	22.1
2,021	22.6
Next 5 years	124.4
OPEB
Defined Benefit Plan Disclosure [Line Items]
2,017	0.4
2,018	0.4
2,019	0.4
2,020	0.4
2,021	0.4
Next 5 years	$ 2.2

Employee Benefit Plans - Funded

Employee Benefit Plans - Funded Status of Defined Benefit Pension Plans (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Amounts recognized in the balance sheet:
Noncurrent pension asset	$ 0.6	$ 0.4
Foreign Pension Plans, Defined Benefit
Change in projected benefit obligations (PBO):
Benefit obligations at beginning of the year	569.7	648.4
Service cost	9.9	11.2	$ 9.9
Interest cost	14.7	14.6	21.7
Participant contributions	1.5	1.6
Actuarial losses (gains)	33.7	(8.7)
Change in currency exchange rates	(15)	(76.4)
Benefits paid	(20.4)	(21)
Benefit obligations at end of the year	594.1	569.7	648.4
Change in plan assets:
Fair value of plan assets at beginning of the year	372	414.8
Actual return (loss) on plan assets	10	10.6
Employer contributions	15.3	17.1
Participant contributions	1.5	1.6
Change in currency exchange rates	(6.9)	(51.1)
Benefits paid	(20.4)	(21)
Fair value of plan assets at end of year	371.5	372	414.8
Funded status	(222.6)	(197.7)
Amounts recognized in the balance sheet:
Noncurrent pension asset	0.6	0.4
Accrued pension/OPEB costs, noncurrent	(223.2)	(198.1)
Total	(222.6)	(197.7)
Accumulated other comprehensive loss, Actuarial losses	257.5	230.6
Accumulated other comprehensive loss, Prior service cost	1.6	1.9
Accumulated other comprehensive loss, Total	259.1	232.5
Accumulated benefit obligations (ABO)	569.5	545.2
United States Pension Plans of US Entity, Defined Benefit
Change in projected benefit obligations (PBO):
Benefit obligations at beginning of the year	18.6	19.8
Interest cost	0.8	0.8	0.8
Actuarial losses (gains)	(0.6)	(1)
Benefits paid	(1)	(1)
Benefit obligations at end of the year	17.8	18.6	19.8
Change in plan assets:
Fair value of plan assets at beginning of the year	13.9	15.5
Actual return (loss) on plan assets	0.5	(0.7)
Employer contributions	0.2	0.1
Benefits paid	(1)	(1)
Fair value of plan assets at end of year	13.6	13.9	15.5
Funded status	(4.2)	(4.7)
Amounts recognized in the balance sheet:
Accrued pension/OPEB costs, current	(0.1)	(0.1)
Accrued pension/OPEB costs, noncurrent	(4.1)	(4.6)
Total	(4.2)	(4.7)
Accumulated other comprehensive loss, Actuarial losses	11	11.6
Accumulated benefit obligations (ABO)	17.8	18.6
OPEB
Change in projected benefit obligations (PBO):
Benefit obligations at beginning of the year	7	8.5
Service cost	0.1	0.1	0.1
Interest cost	0.3	0.3	0.4
Actuarial losses (gains)	(0.1)	(0.2)
Change in currency exchange rates	0.2	(1.3)
Benefits paid	(0.3)	(0.4)
Benefit obligations at end of the year	7.2	7	$ 8.5
Change in plan assets:
Benefits paid	(0.3)	(0.4)
Funded status	(7.2)	(7)
Amounts recognized in the balance sheet:
Accrued pension/OPEB costs, current	(0.3)	(0.3)
Accrued pension/OPEB costs, noncurrent	(6.9)	(6.7)
Total	(7.2)	(7)
Accumulated other comprehensive loss, Actuarial losses	2.9	3.1
Accumulated other comprehensive loss, Prior service cost	(5.5)	(6.2)
Accumulated other comprehensive loss, Total	$ (2.6)	$ (3.1)

Employee Benefit Plans - Compon

Employee Benefit Plans - Components of Net Periodic Benefit Cost (Credit) (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Foreign Pension Plans, Defined Benefit
Defined Benefit Plan Disclosure [Line Items]
Service cost	$ 9.9	$ 11.2	$ 9.9
Interest cost	14.7	14.6	21.7
Expected return on plan assets	(14.4)	(16.6)	(20)
Settlement gain			(0.3)
Recognized actuarial losses	11.3	13.6	10
Amortization of prior service cost	0.2	0.4	0.5
Amortization of net transition obligations			0.1
Total	21.7	23.2	21.9
United States Pension Plans of US Entity, Defined Benefit
Defined Benefit Plan Disclosure [Line Items]
Interest cost	0.8	0.8	0.8
Expected return on plan assets	(1)	(1.1)	(1.2)
Recognized actuarial losses	0.5	0.5	0.3
Total	0.3	0.2	(0.1)
OPEB
Defined Benefit Plan Disclosure [Line Items]
Service cost	0.1	0.1	0.1
Interest cost	0.3	0.3	0.4
Recognized actuarial losses	0.2	0.3	0.2
Amortization of prior service cost	(0.8)	(0.8)	(0.9)
Total	$ (0.2)	$ (0.1)	$ (0.2)

Employee Benefit Plans - Schedu

Employee Benefit 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 ABO Exceeds Plan Assets - USD ($) $ in Millions	Dec. 31, 2016	Dec. 31, 2015
Pension Plans Postretirement And Other Employee Benefits [Line Items]
Projected Benefit Obligation (PBO)	$ 541.5	$ 518.1
Accumulated Benefit Obligation (ABO)	521.8	498.7
Fair value of plan assets	$ 319.5	$ 321.6

Employee Benefit Plans - Sche71

Employee Benefit Plans - Schedule of Assumptions Used (Detail) - Foreign Pension Plans, Defined Benefit	Dec. 31, 2016	Dec. 31, 2015
Pension Plans Postretirement And Other Employee Benefits [Line Items]
Discount rate	2.10%	2.60%
Increase in future compensation levels	2.60%	2.90%

Employee Benefit Plans - Weight

Employee Benefit Plans - Weighted Average Rate Assumptions Used in Determining Net Periodic Pension Cost (Detail)	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Foreign Pension Plans, Defined Benefit
Pension Plans Postretirement And Other Employee Benefits [Line Items]
Discount rate	2.60%	2.50%	3.80%
Increase in future compensation levels	2.90%	2.60%	2.70%
Long-term return on plan assets	3.90%	4.60%	5.00%
United States Pension Plans of US Entity, Defined Benefit
Pension Plans Postretirement And Other Employee Benefits [Line Items]
Discount rate	4.10%	3.80%	4.50%
Long-term return on plan assets	7.50%	7.50%	7.50%

Employee Benefit Plans - Change

Employee Benefit Plans - Changes In Benefit Obligations Recognized In Accumulated Other Comprehensive Income (Loss) (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Defined Benefit Pension Plans
Pension Plans Postretirement And Other Employee Benefits [Line Items]
Net actuarial gain (loss)	$ (38)	$ 2.7	$ (103.9)
Settlements			(0.3)
Net actuarial losses	11.8	14.1	10.3
Prior service cost	0.2	0.4	0.5
Net transition obligations			0.1
Total	(26)	17.2	(93.3)
OPEB
Pension Plans Postretirement And Other Employee Benefits [Line Items]
Net actuarial gain (loss)	0.1	0.2	(0.8)
Net actuarial losses	0.2	0.3	0.2
Prior service cost	(0.8)	(0.8)	(0.9)
Total	$ (0.5)	$ (0.3)	$ (1.5)

Employee Benefit Plans - Sche74

Employee Benefit Plans - Schedule of Aggregate Fair Value of Asset and Supplemental Asset Mix (Detail) - USD ($) $ in Millions	Dec. 31, 2016	Dec. 31, 2015
Combined Master Retirement Trust Asset [Line Items]
CMRT asset value	$ 637.8	$ 648.8
CMRT assets comprised of:
Assets not subject to fair value hierarchy	30.00%	30.00%
Assets subject to fair value hierarchy:
Fair value input	100.00%	100.00%
CMRT asset mix:
Percentage of combined master retirement trust asset mix	100.00%	100.00%
Domestic equities, principally publicly traded
CMRT asset mix:
Percentage of combined master retirement trust asset mix	31.00%	29.00%
International equities, principally publicly traded
CMRT asset mix:
Percentage of combined master retirement trust asset mix	22.00%	22.00%
Fixed income securities, principally publicly traded
CMRT asset mix:
Percentage of combined master retirement trust asset mix	36.00%	38.00%
Privately managed limited partnerships
CMRT asset mix:
Percentage of combined master retirement trust asset mix	5.00%	5.00%
Hedge funds
CMRT asset mix:
Percentage of combined master retirement trust asset mix	5.00%	5.00%
Other, primarily cash
CMRT asset mix:
Percentage of combined master retirement trust asset mix	1.00%	1.00%
Level 1
Assets subject to fair value hierarchy:
Fair value input	54.00%	54.00%
Level 2
Assets subject to fair value hierarchy:
Fair value input	8.00%	7.00%
Level 3
Assets subject to fair value hierarchy:
Fair value input	8.00%	9.00%

Employee Benefit Plans - Compos

Employee Benefit Plans - Composition of Pension Plan Assets (Detail) - USD ($) $ in Millions	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Foreign Pension Plans, Defined Benefit
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]
Pension plan assets	$ 371.5	$ 372	$ 414.8
United States Pension Plans of US Entity, Defined Benefit
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]
Pension plan assets	13.6	13.9	$ 15.5
Defined Benefit Pension Plans
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]
Pension plan assets	385.2	385.9
Defined Benefit Pension Plans | Other Defined Benefit Pension Plans
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]
Pension plan assets	11.7	11.2
Level 1 | Defined Benefit Pension Plans
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]
Pension plan assets	141	135.8
Level 1 | Defined Benefit Pension Plans | Other Defined Benefit Pension Plans
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]
Pension plan assets	3.5	3.5
Level 2 | Defined Benefit Pension Plans
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]
Pension plan assets	13.7	13.9
Level 3 | Defined Benefit Pension Plans
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]
Pension plan assets	230.5	236.2
Level 3 | Defined Benefit Pension Plans | Other Defined Benefit Pension Plans
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]
Pension plan assets	8.2	7.7
Germany | Defined Benefit Pension Plans | Foreign Pension Plans, Defined Benefit
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]
Pension plan assets	217	223.1
Germany | Level 3 | Defined Benefit Pension Plans | Foreign Pension Plans, Defined Benefit
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]
Pension plan assets	217	223.1
Canada | Defined Benefit Pension Plans | Local Currency Equities Member | Foreign Pension Plans, Defined Benefit
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]
Pension plan assets	14.8	9.6
Canada | Defined Benefit Pension Plans | Non Local Currency Equities | Foreign Pension Plans, Defined Benefit
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]
Pension plan assets	19.7	23.3
Canada | Defined Benefit Pension Plans | Local Currency Fixed Income | Foreign Pension Plans, Defined Benefit
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]
Pension plan assets	59.5	50.6
Canada | Defined Benefit Pension Plans | Global Mutual Fund | Foreign Pension Plans, Defined Benefit
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]
Pension plan assets		6.8
Canada | Defined Benefit Pension Plans | Cash And Other | Foreign Pension Plans, Defined Benefit
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]
Pension plan assets	0.4	0.5
Canada | Level 1 | Defined Benefit Pension Plans | Local Currency Equities Member | Foreign Pension Plans, Defined Benefit
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]
Pension plan assets	14.8	9.6
Canada | Level 1 | Defined Benefit Pension Plans | Non Local Currency Equities | Foreign Pension Plans, Defined Benefit
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]
Pension plan assets	19.7	23.3
Canada | Level 1 | Defined Benefit Pension Plans | Local Currency Fixed Income | Foreign Pension Plans, Defined Benefit
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]
Pension plan assets	59.5	50.6
Canada | Level 1 | Defined Benefit Pension Plans | Global Mutual Fund | Foreign Pension Plans, Defined Benefit
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]
Pension plan assets		6.8
Canada | Level 1 | Defined Benefit Pension Plans | Cash And Other | Foreign Pension Plans, Defined Benefit
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]
Pension plan assets	0.4	0.5
Norway | Defined Benefit Pension Plans | Local Currency Equities Member | Foreign Pension Plans, Defined Benefit
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]
Pension plan assets	1.6	2
Norway | Defined Benefit Pension Plans | Non Local Currency Equities | Foreign Pension Plans, Defined Benefit
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]
Pension plan assets	4.1	3.6
Norway | Defined Benefit Pension Plans | Local Currency Fixed Income | Foreign Pension Plans, Defined Benefit
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]
Pension plan assets	23.2	24.5
Norway | Defined Benefit Pension Plans | Cash And Other | Foreign Pension Plans, Defined Benefit
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]
Pension plan assets	9.9	7.9
Norway | Defined Benefit Pension Plans | Non Local Currency Fixed Income | Foreign Pension Plans, Defined Benefit
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]
Pension plan assets	5.4	4.7
Norway | Defined Benefit Pension Plans | Real Estate | Foreign Pension Plans, Defined Benefit
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]
Pension plan assets	4.2	4.2
Norway | Level 1 | Defined Benefit Pension Plans | Local Currency Equities Member | Foreign Pension Plans, Defined Benefit
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]
Pension plan assets	1.6	2
Norway | Level 1 | Defined Benefit Pension Plans | Non Local Currency Equities | Foreign Pension Plans, Defined Benefit
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]
Pension plan assets	4.1	3.6
Norway | Level 1 | Defined Benefit Pension Plans | Local Currency Fixed Income | Foreign Pension Plans, Defined Benefit
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]
Pension plan assets	23.2	24.5
Norway | Level 1 | Defined Benefit Pension Plans | Cash And Other | Foreign Pension Plans, Defined Benefit
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]
Pension plan assets	8.8	6.7
Norway | Level 1 | Defined Benefit Pension Plans | Non Local Currency Fixed Income | Foreign Pension Plans, Defined Benefit
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]
Pension plan assets	5.4	4.7
Norway | Level 3 | Defined Benefit Pension Plans | Cash And Other | Foreign Pension Plans, Defined Benefit
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]
Pension plan assets	1.1	1.2
Norway | Level 3 | Defined Benefit Pension Plans | Real Estate | Foreign Pension Plans, Defined Benefit
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]
Pension plan assets	4.2	4.2
United States | Defined Benefit Pension Plans | CMRT | United States Pension Plans of US Entity, Defined Benefit
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]
Pension plan assets	13.7	13.9
United States | Level 2 | Defined Benefit Pension Plans | CMRT | United States Pension Plans of US Entity, Defined Benefit
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]
Pension plan assets	$ 13.7	$ 13.9

Employee Benefit Plans - Rollfo

Employee Benefit 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, 2016	Dec. 31, 2015
Fair Value Assets Measured On Recurring Basis Unobservable Input Reconciliation [Line Items]
Fair value at beginning of year	$ 236.2	$ 254.1
Gain on assets held at end of year	4.1	6.5
Gain on assets sold during the year		0.3
Assets purchased	13.1	13.7
Assets sold	(13.4)	(12.4)
Currency exchange rate fluctuations	(9.5)	(26)
Fair value at end of year	$ 230.5	$ 236.2

Employee Benefit Plans - Postre

Employee Benefit Plans - Postretirement Benefits Other Than Pensions (OPEB) - Additional Information (Detail) - OPEB - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Defined Benefit Plan Disclosure [Line Items]
Health care benefits	65 years
Unrecognized actuarial losses to be recognized in next fiscal year	$ 0.2
Unrecognized prior service credit to be recognized in next fiscal year	0.6
Accumulated benefit obligations (ABO)	$ 7.2	$ 7	$ 8.5
Discount rate	3.90%	3.70%	4.60%
United States
Defined Benefit Plan Disclosure [Line Items]
Accumulated benefit obligations (ABO)	$ 0.5	$ 0.6
Canada
Defined Benefit Plan Disclosure [Line Items]
Accumulated benefit obligations (ABO)	$ 6.7	$ 6.4

Employee Benefit Plans - Key Ac

Employee Benefit Plans - Key Actuarial Assumptions Used to Determine Net Benefit Obligation (Detail) - OPEB	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015
Pension Plans Postretirement And Other Employee Benefits [Line Items]
Initial rate	7.00%	7.00%
Ultimate rate	5.00%	5.00%
Year of ultimate rate achievement	2,021	2,021
Weighted average discount rate	3.50%	3.90%

Other Noncurrent Liabilities -

Other Noncurrent Liabilities - Components of Other Noncurrent Liabilities (Detail) - USD ($) $ in Millions	Dec. 31, 2016	Dec. 31, 2015
Other Liabilities Noncurrent [Abstract]
Reserve for uncertain tax positions	$ 7.3	$ 11.8
Employee benefits	7.8	7.5
Interest rate swap contract	0.2	0.2
Other	7.1	4.9
Total	$ 22.4	$ 24.4

Other Operating Income (Expen80

Other Operating Income (Expense), Net - Additional Information (Detail) - USD ($)	3 Months Ended			6 Months Ended
	Dec. 31, 2016	Jun. 30, 2016	Mar. 31, 2016	Jun. 30, 2016
Other Operating Income And Expense [Line Items]
Insurance settlements receivable	$ 0
Other Operating Income (Expense), Net
Other Operating Income And Expense [Line Items]
Income received from settlement of business interruption insurance claim	$ 900,000	$ 1,400,000	$ 2,000,000	$ 3,400,000

Restructuring Costs - Additiona

Restructuring Costs - Additional Information (Detail) $ in Millions	3 Months Ended			9 Months Ended	12 Months Ended
	Dec. 31, 2015USD ($)	Sep. 30, 2015USD ($)	Jun. 30, 2015USD ($)	Dec. 31, 2015Employee	Dec. 31, 2016	Dec. 31, 2015USD ($)
Restructuring Cost And Reserve [Line Items]
Workforce reduction, number of individuals | Employee				160
Workforce reduction, recognized aggregate charge	$ 0.2	$ 0.4	$ 21.1			$ 21.7
Accrued severance costs expected to be paid					2017-03
Cost Of Sales
Restructuring Cost And Reserve [Line Items]
Workforce reduction, recognized aggregate charge						10.8
Selling, General and Administrative Expense
Restructuring Cost And Reserve [Line Items]
Workforce reduction, recognized aggregate charge						$ 10.9

Restructuring Costs - Summary o

Restructuring Costs - Summary of Activity in Accrued Workforce Reduction (Detail) - USD ($) $ in Millions	3 Months Ended			12 Months Ended
	Dec. 31, 2015	Sep. 30, 2015	Jun. 30, 2015	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2016	Dec. 31, 2015
Restructuring Cost And Reserve [Line Items]
Workforce reduction costs accrued	$ 0.2	$ 0.4	$ 21.1		$ 21.7
Amounts recognized in the balance sheet:
Current liability						$ 1.2	$ 5.3
Workforce Reduction
Restructuring Cost And Reserve [Line Items]
Balance at beginning of the year				$ 5.6
Workforce reduction costs accrued					21.7
Workforce reduction costs paid				(4.1)	(15.9)
Currency translation adjustments, net				(0.1)	(0.2)
Balance at end of the year	5.6			1.4	5.6
Amounts recognized in the balance sheet:
Current liability						1.2	5.3
Noncurrent liability						0.2	0.3
Restructuring Reserve	$ 5.6			$ 5.6	$ 5.6	$ 1.4	$ 5.6

Income Taxes - Components of In

Income Taxes - Components of Income Taxes and Comprehensive Provision for Income Taxes Allocation (Detail) - USD ($) $ in Millions	3 Months Ended		12 Months Ended
	Dec. 31, 2016	Sep. 30, 2016	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Schedule Of Income Tax [Line Items]
U.S.			$ 11.5	$ 5.5	$ 59.2
Non-U.S.			49.7	(36.3)	74.5
Income (loss) before income taxes			61.2	(30.8)	133.7
Expected tax expense (benefit), at U.S. federal statutory income tax rate of 35%			21.4	(10.8)	46.8
Non-U.S. tax rates			(4.3)	0.5	(4.2)
Incremental net tax (benefit) on earnings and losses of non-U.S. companies			2.2	(8.7)	(3.7)
Valuation allowance			(2.2)	159
Adjustment to the reserve for uncertain tax positions, net	$ 2.4		2.4	0.7	(5.1)
Nondeductible expenses			1.5	2.1	1.9
U.S. state income taxes and other, net			0.3		(1.2)
Provision for income taxes			17.9	142.8	34.5
Currently payable:
U.S. federal and state				0.3	1.9
Non-U.S.			9.5	3.3	15.2
Total			9.5	3.6	17.1
Deferred income taxes (benefit):
U.S. federal and state			4.3	(6.4)	10
Non-U.S.			4.1	145.6	7.4
Total			8.4	139.2	17.4
Comprehensive provision for income taxes (benefit) allocable to:
Net income			17.9	142.8	34.5
Other comprehensive income (loss):
Currency translation					(16.9)
Marketable securities			1.3	1.1	(6.7)
Interest rate swap			0.2	(1.3)
Total			18.4	144	(19.6)
Defined Benefit Pension Plans
Other comprehensive income (loss):
Benefit plans			(0.8)	1.5	(30.1)
OPEB
Other comprehensive income (loss):
Benefit plans			(0.2)	$ (0.1)	$ (0.4)
US-Canada APA
Schedule Of Income Tax [Line Items]
U.S. - Canada APA	$ 2.2	$ (5.6)	$ (3.4)

Income Taxes - Components of 84

Income Taxes - Components of Income Taxes and Comprehensive Provision for Income Taxes Allocation (Parenthetical) (Detail)	12 Months Ended
	Dec. 31, 2016
Income Tax Disclosure [Abstract]
U.S. Federal statutory income tax rate	35.00%

Income Taxes - Additional Infor

Income Taxes - Additional Information (Detail) CAD in Millions, $ in Millions	Jun. 30, 2015USD ($)	Dec. 31, 2016USD ($)	Sep. 30, 2016USD ($)	Jun. 30, 2016USD ($)	Dec. 31, 2015USD ($)	Sep. 30, 2015USD ($)	Jun. 30, 2015USD ($)	Dec. 31, 2016USD ($)	Dec. 31, 2015USD ($)	Dec. 31, 2014USD ($)	Dec. 31, 2016CAD
Income Tax [Line Items]
U.S. Federal statutory income tax rate								35.00%
Valuation allowance								$ (2.2)	$ 159
Increase (decrease) in non-cash deferred income tax asset valuation allowance								6.7	9.8
Aggregate letter of credit outstanding amount | CAD											CAD 7.9
Income taxes		$ 5			$ 5.7			5	5.7
Amount of interest and penalties		2.5			2.3			2.5	2.3	$ 2.8
Benefits if uncertain tax position recognized		10.6			7.8			10.6	$ 7.8	8.8
Decrease in unrecognized tax benefits excluding interest related to certain adjustments		6.3						$ 6.3
US-Canada APA
Income Tax [Line Items]
U.S.-Canada Advance Pricing Agreement, description								Tax authorities are examining certain of our U.S. and non-U.S. tax returns and have or 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 will be resolved in our favor, and therefore our potential exposure, if any, is also uncertain.  In 2011 and 2012 we received notices of re-assessment from the Canadian federal and provincial tax authorities related to the years 2002 through 2004. We objected to the re-assessments and believed the position was without merit. Accordingly, we appealed the re-assessments and in connection with such appeal we were required to post letters of credit aggregating Cdn. $7.9 million. In 2014, the Appeals Division of the Canadian Revenue Authority ruled in our favor and reversed in their entirety such notices of re-assessment. As a result, we recognized a non-cash income tax benefit of $3.0 million related to the release of a portion of our reserve for uncertain tax positions in 2014 related to the completion of this Canadian income tax audit. In addition, the related letters of credit have been cancelled.  Also during 2014, we recognized a non-cash income tax benefit of $3.1 million related to the release of a portion of our reserve for uncertain tax positions in conjunction with the completion of an audit of our U.S. income tax return for 2009.  As a result of ongoing audits in certain jurisdictions, 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 the third quarter of 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 2016, Contran, as the ultimate parent of our U.S. Consolidated income tax group, executed and finalized an Advance Pricing Agreement with the U.S. Internal Revenue Service and our Canadian subsidiary executed and finalized an Advance Pricing Agreement with the Competent Authority for Canada (collectively, the “U.S.-Canada APA”) effective for tax years 2005 – 2015.
U.S.-Canada APA		2.2	$ (5.6)					$ (3.4)
US-Canada APA | Canadian Subsidiary
Income Tax [Line Items]
Income tax payable		2.3						2.3			CAD 3
Income taxes		2.3						2.3
Canadian Income Tax Audit
Income Tax [Line Items]
Non-cash income tax benefit recognized related to release of portion of reserve for uncertain tax positions										3
U.S. Income Tax Audit
Income Tax [Line Items]
Non-cash income tax benefit recognized related to release of portion of reserve for uncertain tax positions										$ 3.1
Germany and Belgian
Income Tax [Line Items]
Valuation allowance	$ 150.3	(4.3)	$ (0.8)	$ 2.9	6.4	$ 2.3	$ 150.3
Increase (decrease) in non-cash deferred income tax asset valuation allowance					$ 8.7	$ 8.7		(2.2)
Corporate Purposes | Germany
Income Tax [Line Items]
Net operating loss carryforwards		638						638
Corporate Purposes | Belgium
Income Tax [Line Items]
Net operating loss carryforwards		93						93
Trade Tax Purposes | Germany
Income Tax [Line Items]
Net operating loss carryforwards		$ 71						$ 71
Canada Revenue Agency | US-Canada APA | Canadian Subsidiary | Earliest Tax Year
Income Tax [Line Items]
Effective tax year								2,005
Canada Revenue Agency | US-Canada APA | Canadian Subsidiary | Latest Tax Year
Income Tax [Line Items]
Effective tax year								2,015

Income Taxes - Components of Ne

Income Taxes - Components of Net Deferred Income Taxes (Detail) - USD ($) $ in Millions	Dec. 31, 2016	Dec. 31, 2015
Income Tax Disclosure [Abstract]
Inventories, Assets	$ 3.7	$ 3.2
Accrued OPEB costs, Assets	2	2
Accrued pension cost, Assets	48.3	39.4
Currency revaluation on intercompany debt, Assets	24	18.6
Other accrued liabilities and deductible differences, Assets	12.6	19.4
Tax loss and tax credit carryforwards, Assets	145.5	157.4
Valuation allowance, Assets	(173.4)	(168.9)
Adjusted gross deferred tax assets	62.7	71.1
Netting by tax jurisdiction, Assets	(54.6)	(57.1)
Net noncurrent deferred tax asset	8.1	14
Inventories, Liabilities	(3.7)	(3.5)
Property and equipment, Liabilities	(58.1)	(59.3)
Other taxable differences, Liabilities	(0.4)	(0.5)
Tax on unremitted earnings of non-U.S. subsidiaries, Liabilities	(2.9)	(1.9)
Adjusted gross deferred tax liabilities	(65.1)	(65.2)
Netting by tax jurisdiction, Liabilities	54.6	57.1
Net noncurrent deferred tax liability	$ (10.5)	$ (8.1)

Income Taxes - Changes in Amoun

Income Taxes - Changes in Amount of Uncertain Tax Positions (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Changes in unrecognized tax benefits:
Unrecognized tax benefits at beginning of year	$ 9.7	$ 10.4	$ 15.9
Net increase (decrease):
Tax positions taken in prior periods	(0.1)	(0.3)	(5.4)
Tax positions taken in current period	2.5	1.1	1.1
Lapse due to applicable statute of limitations	(0.2)	(0.2)
Settlements with taxing authorities	(2.3)
Change in currency exchange rates	0.3	(1.3)	(1.2)
Unrecognized tax benefits at end of year	$ 9.9	$ 9.7	$ 10.4

Stockholders' Equity - Addition

Stockholders' Equity - Additional Information (Detail) - shares	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Stockholders Equity Note [Abstract]
Existing long-term incentive plan				200,000
Shares available for future award under proposed long term incentive plan	163,500
Shares awarded under proposed long term incentive plan	13,500	8,000	8,000
Number of shares authorized for repurchase				2,000,000
Shares available for repurchase under the plan	1,951,000

Stockholder's Equity - Schedule

Stockholder's Equity - Schedule of Changes in Accumulated Other Comprehensive Loss (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Accumulated Other Comprehensive Income Loss [Line Items]
Beginning Balance	$ 461.9	$ 781.1	$ 935.1
Other comprehensive income (loss)	(40.8)	(76.2)	(183.8)
Ending Balance	395	461.9	781.1
Currency Translation
Accumulated Other Comprehensive Income Loss [Line Items]
Beginning Balance	(252)	(159.8)	(56.8)
Other comprehensive income (loss)	(17.6)	(92.2)	(103)
Ending Balance	(269.6)	(252)	(159.8)
Marketable Securities
Accumulated Other Comprehensive Income Loss [Line Items]
Beginning Balance	(0.6)	(2.9)	10.8
Other comprehensive income (loss)	2.4	(6.5)	(13.7)
Less reclassification adjustment		8.8
Ending Balance	1.8	(0.6)	(2.9)
Accumulated Defined Benefit Plans Adjustment | Defined Benefit Pension Plans
Accumulated Other Comprehensive Income Loss [Line Items]
Beginning Balance	(159.2)	(175.4)	(109.4)
Other comprehensive income (loss)	8.5	10	7.2
Net actuarial gain (loss) arising during year	(34.1)	6.2	(73.2)
Ending Balance	(184.8)	(159.2)	(175.4)
Accumulated Defined Benefit Plans Adjustment | OPEB Plans
Accumulated Other Comprehensive Income Loss [Line Items]
Beginning Balance	2.1	2.3	3.4
Other comprehensive income (loss)	(0.4)	(0.4)	(0.5)
Net actuarial gain (loss) arising during year	0.1	0.2	(0.6)
Ending Balance	1.8	2.1	2.3
Interest Rate Swap
Accumulated Other Comprehensive Income Loss [Line Items]
Beginning Balance	(2.3)
Other comprehensive income (loss)	(2)	(2.9)
Less reclassification adjustment	2.3	0.6
Ending Balance	(2)	(2.3)
Total Accumulated Other Comprehensive Loss
Accumulated Other Comprehensive Income Loss [Line Items]
Beginning Balance	(412)	(335.8)	(152)
Ending Balance	$ (452.8)	$ (412)	$ (335.8)

Related Party Transactions - Ad

Related Party Transactions - Additional Information (Detail) - USD ($)	1 Months Ended	12 Months Ended
	Feb. 28, 2013	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013	Nov. 30, 2010
Contran
Related Party Transaction [Line Items]
Expense transaction with affiliate			$ 100,000	$ 100,000	$ 100,000
Contran | Intercorporate Services Agreement
Related Party Transaction [Line Items]
Intercorporate services fees			15,200,000	13,400,000	12,300,000
Contran | Scenario, Forecast | Intercorporate Services Agreement
Related Party Transaction [Line Items]
Intercorporate services fees		$ 15,700,000
Promissory note | Contran
Related Party Transaction [Line Items]
Borrowed funds	$ 190,000,000					$ 190,000,000
Repayments of Lines of Credit						$ 20,000,000
Interest expense on loan					1,600,000
LPC | Titanium Dioxide Pigments
Related Party Transaction [Line Items]
Purchase of TiO2			157,900,000	176,500,000	193,100,000
LPC | Titanium Dioxide Feedstock
Related Party Transaction [Line Items]
Sales of feedstock ore to LPC			68,800,000	80,600,000	98,400,000
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			$ 400,000	500,000	500,000
Tall Pines Insurance Inc and EWIRE Inc | Insurance Premiums
Related Party Transaction [Line Items]
Expense transaction with affiliate			$ 9,200,000	$ 10,300,000	$ 10,700,000

Related Party Transactions - Su

Related Party Transactions - Summary of Current Receivables from and Payables to Affiliates (Detail) - USD ($) $ in Millions	Dec. 31, 2016	Dec. 31, 2015
Related Party Transaction [Line Items]
Current receivable from affiliate	$ 3.5	$ 2.5
Current payables to affiliates	14.7	19.5
Valhi | Income Tax Receivable
Related Party Transaction [Line Items]
Current receivable from affiliate	0.7
Valhi | Income Tax Payable
Related Party Transaction [Line Items]
Current payables to affiliates		0.1
Other Affiliates | Other Receivable
Related Party Transaction [Line Items]
Current receivable from affiliate	2.8	2.5
Louisiana Pigment Company, L.P. | Trade Items
Related Party Transaction [Line Items]
Current payables to affiliates	$ 14.7	$ 19.4

Commitment and Contingencies -

Commitment and Contingencies - Additional Information (Detail) $ in Millions	12 Months Ended
	Dec. 31, 2016USD ($)Customer	Dec. 31, 2015USD ($)	Dec. 31, 2014USD ($)
Commitment And Contingencies [Line Items]
TiO2 Customers | Customer	4,000
Net Sales of TiO2	33.00%	34.00%	35.00%
Current Tio2 production capacity in Leverkusen facility	33.00%
Net rent expense	$ 14	$ 14	$ 16
Aggregate future minimum rental commitments	53
Leverkusen Facility Lease
Commitment And Contingencies [Line Items]
Aggregate future minimum rental commitments	$ 16
Minimum
Commitment And Contingencies [Line Items]
Long term master agreements expiring	2,017
Maximum
Commitment And Contingencies [Line Items]
Long term master agreements expiring	2,019
Feedstock
Commitment And Contingencies [Line Items]
Minimum purchase commitments	$ 605
Various Raw Materials and Services
Commitment And Contingencies [Line Items]
Minimum purchase commitments	$ 158
Net Sales | Product Concentration Risk | Titanium Dioxide Pigments
Commitment And Contingencies [Line Items]
Approximate percent sales by volume	93.00%	92.00%	90.00%
Net Sales | Customer Concentration Risk | Behr Process Corporation
Commitment And Contingencies [Line Items]
Approximate percent sales by volume	10.00%	10.00%	10.00%

Commitments and Contingencies -

Commitments and Contingencies - Summary of Approximate Percentage of TiO2 Sales by Volume (Detail) - Net Sales - Geographic Concentration Risk	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
European
Schedule Of Net Sales By Geographical Segment [Line Items]
Approximate percent sales by volume	51.00%	52.00%	50.00%
North America
Schedule Of Net Sales By Geographical Segment [Line Items]
Approximate percent sales by volume	29.00%	29.00%	33.00%

Commitments and Contingencies94

Commitments and Contingencies - Summary of Future Minimum Payments Under Non-cancellable Operating Leases (Detail) $ in Millions	Dec. 31, 2016USD ($)
Commitments And Contingencies Disclosure [Abstract]
2,017	$ 10.8
2,018	6.3
2,019	5
2,020	4.1
2,021	3.5
2022 and thereafter	23.3
Total	$ 53

Financial Instruments - Valuati

Financial Instruments - Valuation of Financial Instruments Recorded on Fair Value Basis (Detail) - USD ($) $ in Millions	Dec. 31, 2016	Dec. 31, 2015
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]
Noncurrent marketable securities	$ 6	$ 2.4
Fair Value Measurements Recurring
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]
Currency forward contracts		(1.2)
Interest rate swap contract	(3.1)	(3.5)
Noncurrent marketable securities	6	2.4
Fair Value Measurements Recurring | Level 1
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]
Currency forward contracts		(1.2)
Noncurrent marketable securities	6	2.4
Fair Value Measurements Recurring | Level 2
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]
Interest rate swap contract	$ (3.1)	$ (3.5)

Financial Instruments - Additio

Financial Instruments - Additional Information (Detail)	12 Months Ended
	Dec. 31, 2016USD ($)DerivativeContract	Dec. 31, 2015USD ($)
Term Loan
Financial Instrument At Fair Value [Line Items]
Debt instrument base principal amount	$ 1,000
Debt instrument estimated market price per $1000 principal amount	$ 983
Accounts Payable and Accrued Liabilities
Financial Instrument At Fair Value [Line Items]
Estimated fair value of currency forward contracts recognized as part of accounts payable and accrued liabilities		$ 1,200,000
Currency Forward Contracts
Financial Instrument At Fair Value [Line Items]
Number of derivative contacts outstanding | DerivativeContract	0
Interest Rate Swap
Financial Instrument At Fair Value [Line Items]
Gain loss recognized in earnings on hedge ineffectiveness	$ 0
Pretax unrealized loss recognized in other comprehensive income related to interest rate swap contract	3,100,000	4,400,000
Reclassified from accumulated other comprehensive income in to earnings (interest expense)	3,500,000	900,000
Pre-tax amount of accumulated other comprehensive income expected to be reclassified to earnings during next twelve months	3,500,000
Fair value of interest rate swap contract	$ 3,100,000	3,500,000
Interest Rate Swap | London Interbank Offered Rate (LIBOR)
Financial Instrument At Fair Value [Line Items]
Derivative, type of instrument	pay-fixed/receive-variable interest rate swap
Interest rate swap, type of interest rate	fixed
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	$ 340,400,000	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, final maturity date	Feb. 29, 2020
Interest Rate Swap | Accounts Payable and Accrued Liabilities
Financial Instrument At Fair Value [Line Items]
Fair value of interest rate swap contract, current	$ 2,900,000	3,300,000
Interest Rate Swap | Other Noncurrent Liabilities
Financial Instrument At Fair Value [Line Items]
Fair value of interest rate swap contract, noncurrent	$ 200,000	$ 200,000

Financial Instruments - Financi

Financial Instruments - Financial Instruments not Carried at Fair Value but which Require Fair Value Disclosure (Detail) - USD ($) $ in Millions	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Fair Value Disclosures [Abstract]
Cash, cash equivalents and restricted cash, Carrying amount	$ 52.3	$ 94.3
Variable rate term loan, Carrying amount	335.9	338
Common stockholders' equity, Carrying amount	395	461.9	$ 781.1	$ 935.1
Cash, cash equivalents and restricted cash, Fair value	52.3	94.3
Variable rate term loan, Fair value	334.6	309.5
Common stockholders' equity, Fair value	$ 1,383.8	$ 653.6

Recent Accounting Pronounceme98

Recent Accounting Pronouncements - Additional Information (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
New Accounting Pronouncements Or Change In Accounting Principle [Line Items]
Net cash used in investing activities	$ 53	$ 47.1	$ 61.2
Effect of exchange rate changes on cash, cash equivalents and restricted cash	$ (5.3)	(8.5)	(10)
ASU 2016-18
New Accounting Pronouncements Or Change In Accounting Principle [Line Items]
Net cash used in investing activities		47.1	61.2
Effect of exchange rate changes on cash, cash equivalents and restricted cash		(8.5)	(10)
ASU 2016-18 | Scenario Previously Reported
New Accounting Pronouncements Or Change In Accounting Principle [Line Items]
Net cash used in investing activities		46.8	54
Effect of exchange rate changes on cash, cash equivalents and restricted cash		$ (8.4)	$ (9.4)

Quarterly Results of Operatio99

Quarterly Results of Operations (Unaudited) - Quarterly Results of Operation (Detail) - USD ($) $ / shares in Units, $ in Millions	3 Months Ended								12 Months Ended
	Dec. 31, 2016	Sep. 30, 2016	Jun. 30, 2016	Mar. 31, 2016	Dec. 31, 2015	Sep. 30, 2015	Jun. 30, 2015	Mar. 31, 2015	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Selected Quarterly Financial Information [Abstract]
Net sales	$ 333.7	$ 356.1	$ 356.1	$ 318.4	$ 287	$ 336.5	$ 360.2	$ 365.1	$ 1,364.3	$ 1,348.8	$ 1,651.9
Gross margin	85.6	75.5	55.5	40.4	25.2	43.2	46.5	77.4	257	192.3	349.7
Net income (loss)	$ 23.2	$ 22.2	$ 1.7	$ (3.8)	$ (20.4)	$ (11.8)	$ (159.8)	$ 18.4	$ 43.3	$ (173.6)	$ 99.2
Basic and diluted income (loss) per share	$ 0.20	$ 0.19	$ 0.01	$ (0.03)	$ (0.18)	$ (0.10)	$ (1.38)	$ 0.16	$ 0.37	$ (1.50)	$ 0.86

Quarterly Results of Operati100

Quarterly Results of Operations - Additional Information (Detail) - USD ($) $ in Millions	Jun. 30, 2015	Dec. 31, 2016	Sep. 30, 2016	Jun. 30, 2016	Mar. 31, 2016	Dec. 31, 2015	Sep. 30, 2015	Jun. 30, 2015	Jun. 30, 2016	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Schedule Of Quarterly Financial Information [Line Items]
Workforce reduction, recognized aggregate charge						$ 0.2	$ 0.4	$ 21.1			$ 21.7
Pre-tax impairment charge to write down							12
Valuation allowance										$ (2.2)	159
Income tax expense related to increase in reserve for uncertain tax positions		$ 2.4								2.4	$ 0.7	$ (5.1)
US-Canada APA
Schedule Of Quarterly Financial Information [Line Items]
U.S.-Canada APA		2.2	$ (5.6)							$ (3.4)
Other Operating Income (Expense), Net
Schedule Of Quarterly Financial Information [Line Items]
Income received from settlement of business interruption insurance claim		0.9		$ 1.4	$ 2				$ 3.4
Germany and Belgian
Schedule Of Quarterly Financial Information [Line Items]
Valuation allowance	$ 150.3	$ (4.3)	$ (0.8)	$ 2.9		$ 6.4	$ 2.3	$ 150.3