Minerals (MTX) 10-Q 23 Oct 15 2015 Q3 Quarterly report Financial data

Document and Entity Information

Document and Entity Information - shares	9 Months Ended
	Sep. 27, 2015	Oct. 13, 2015
Document and Entity Information [Abstract]
Entity Registrant Name	MINERALS TECHNOLOGIES INC
Entity Central Index Key	891,014
Current Fiscal Year End Date	--12-31
Entity Well-known Seasoned Issuer	Yes
Entity Voluntary Filers	No
Entity Current Reporting Status	Yes
Entity Filer Category	Large Accelerated Filer
Entity Common Stock, Shares Outstanding		34,749,294
Document Fiscal Year Focus	2,015
Document Fiscal Period Focus	Q3
Document Type	10-Q
Amendment Flag	false
Document Period End Date	Sep. 27, 2015

CONDENSED CONSOLIDATED STATEMEN

CONDENSED CONSOLIDATED STATEMENTS OF INCOME (Unaudited) - USD ($) shares in Millions, $ in Millions	3 Months Ended		9 Months Ended
	Sep. 27, 2015	Sep. 28, 2014	Sep. 27, 2015	Sep. 28, 2014
CONDENSED CONSOLIDATED STATEMENTS OF INCOME (Unaudited) [Abstract]
Product sales	$ 410.1	$ 458.1	$ 1,218.8	$ 1,075
Service revenue	40.9	85.4	148.8	134
Total net sales	451	543.5	1,367.6	1,209
Cost of goods sold	302.4	337.8	895.8	812
Cost of service revenue	29.7	60.7	110.2	94
Total cost of sales	332.1	398.5	1,006	906
Production margin	118.9	145	361.6	303
Marketing and administrative expenses	47.9	59.7	139.6	127.4
Research and development expenses	6.2	6.6	17.8	18
Amortization expense of intangible assets acquired	2	1.9	5.8	2.9
Acquisition related transaction and integration costs	2.4	4.2	8.5	16.7
Restructuring and other charges	10.5	5.8	27.3	11.8
Income from operations	49.9	66.8	162.6	126.2
Interest expense, net	(14.5)	(16)	(45.5)	(25.2)
Extinguishment of debt costs and fees	0	0	(4.5)	(5.8)
Other non-operating income (deductions), net	2.8	0.9	5.7	0.5
Total non-operating deductions, net	(11.7)	(15.1)	(44.3)	(30.5)
Income from continuing operations before provision for taxes and equity in earnings	38.2	51.7	118.3	95.7
Provision for taxes on income	8.4	14.4	25.8	24.8
Equity in earnings of affiliates, net of tax	0.5	0.3	1.4	0.6
Income from continuing operations, net of tax	30.3	37.6	93.9	71.5
Income from discontinued operations, net of tax	0	0.2	0	2
Consolidated net income	30.3	37.8	93.9	73.5
Less: Net income attributable to non-controlling interests	1.1	0.8	2.9	2.4
Net income attributable to Minerals Technologies Inc. (MTI)	$ 29.2	$ 37	$ 91	$ 71.1
Basic:
Income from continuing operations attributable to MTI (in dollars per share)	$ 0.84	$ 1.07	$ 2.62	$ 2
Income from discontinued operations attributable to MTI (in dollars per share)	0	0	0	0.06
Basic earnings per share attributable to MTI (in dollars per share)	0.84	1.07	2.62	2.06
Diluted:
Income from continuing operations attributable to MTI (in dollars per share)	0.83	1.06	2.60	1.99
Income from discontinued operations attributable to MTI (in dollars per share)	0	0	0	0.06
Diluted earnings per share attributable to MTI (in dollars per share)	0.83	1.06	2.60	2.05
Cash dividends declared per common share (in dollars per share)	$ 0.05	$ 0.05	$ 0.15	$ 0.15
Shares used in computation of earnings per share:
Basic (in shares)	34.7	34.5	34.7	34.5
Diluted (in shares)	35	34.8	35	34.8

CONDENSED CONSOLIDATED STATEME3

CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (Unaudited) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 27, 2015	Sep. 28, 2014	Sep. 27, 2015	Sep. 28, 2014
CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (Unaudited) [Abstract]
Consolidated net income	$ 30.3	$ 37.8	$ 93.9	$ 73.5
Other comprehensive income, net of tax:
Foreign currency translation adjustments	(35.8)	(27.7)	(66.1)	(22)
Pension and postretirement plan adjustments	1.6	0.8	4.6	2.5
Total other comprehensive income, net of tax	(34.2)	(26.9)	(61.5)	(19.5)
Total comprehensive income including non-controlling interests	(3.9)	10.9	32.4	54
Comprehensive income attributable to non-controlling interest	(0.2)	(0.7)	(1.9)	(1.9)
Comprehensive income attributable to MTI	$ (4.1)	$ 10.2	$ 30.5	$ 52.1

CONDENSED CONSOLIDATED BALANCE

CONDENSED CONSOLIDATED BALANCE SHEETS - USD ($) $ in Millions	Sep. 27, 2015	[1]	Dec. 31, 2014	[2]
Current assets:
Cash and cash equivalents	$ 224.9		$ 249.6
Short-term investments, at cost which approximates market	2.9		0.8
Accounts receivable, net	385.7		412.6
Inventories	203.6		211.8
Prepaid expenses and other current assets	60.9		49.8
Total current assets	878		924.6
Property, plant and equipment, less accumulated depreciation and depletion - Sept . 27, 2015 - $1,015.6; December 31, 2014 - $992.1	1,125.7		1,182.1
Goodwill	789.2		770.9
Intangible assets	214.7		212.1
Other assets and deferred charges	140.9		137
Total assets	3,148.5		3,226.7
Current liabilities:
Short-term debt	6.2		5.6
Current maturities of long-term debt	2.2		0.3
Accounts payable	176.3		170.4
Other current liabilities	181.7		176.6
Total current liabilities	366.4		352.9
Long-term debt, net of unamortized discount	1,325.6		1,455.5
Deferred income taxes	310.4		314.5
Other non-current liabilities	221.4		214.9
Total liabilities	2,223.8		2,337.8
Shareholders' equity:
Common stock	4.8		4.8
Additional paid-in capital	382.7		373
Retained earnings	1,277.4		1,191.8
Accumulated other comprehensive loss	(173.3)		(112.9)
Less common stock held in treasury	(593.7)		(593.7)
Total MTI shareholders' equity	897.9		863
Non-controlling interest	26.8		25.9
Total shareholders' equity	924.7		888.9
Total liabilities and shareholders' equity	$ 3,148.5		$ 3,226.7
[1]	Unaudited
[2]	Condensed from audited financial statements

CONDENSED CONSOLIDATED BALANCE5

CONDENSED CONSOLIDATED BALANCE SHEETS (Parenthetical) - USD ($) $ in Millions	Sep. 27, 2015	Dec. 31, 2014
ASSETS
Accumulated depreciation and depletion	$ 1,015.6	$ 992.1

CONDENSED CONSOLIDATED STATEME6

CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (Unaudited) - USD ($) $ in Millions	9 Months Ended
	Sep. 27, 2015		Sep. 28, 2014
Operating Activities:
Consolidated net income	$ 93.9		$ 73.5
Income from discontinued operations	0		2
Income from continuing operations	93.9		71.5
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation, depletion and amortization	77.3		59.8
Impairment of assets	21.1		0
Other non-cash items	8.2		12.5
Net changes in operating assets and liabilities	(5.8)		50.5
Net cash provided by continuing operations	194.7		194.3
Net cash used in discontinued operations	0		(3.5)
Net cash provided by operating activities	194.7		190.8
Investing Activities:
Purchases of property, plant and equipment	(70.5)		(62.4)
Acquisition of business, net of cash acquired	0		(1,802.3)
Proceeds from sale of assets	4.9		8.7
Proceeds from sale of short-term investments	0.6		0
Purchases of short-term investments	(4.7)		(1.8)
Net cash used in investing activities	(69.7)		(1,857.8)
Financing Activities:
Proceeds from issuance of long-term debt	10.2		1,545.3
Debt issuance and settlement costs	0		(38.2)
Repayment of long-term debt	(140.4)		(113.2)
Net issuance (repayment) of short-term debt	1		(0.8)
Proceeds from issuance of stock under option plan	1.3		2.8
Excess tax benefits related to stock incentive programs	0.3		0.5
Purchase of non-controlling interest share	0		(2.1)
Dividends paid to non-controlling interest	(0.9)		(3.3)
Cash dividends paid	(5.2)		(5.2)
Net cash provided by (used in) financing activities	(133.7)		1,385.8
Effect of exchange rate changes on cash and cash equivalents	(16)		(6.4)
Net decrease in cash and cash equivalents	(24.7)		(287.6)
Cash and cash equivalents at beginning of period	249.6	[1]	490.3
Cash and cash equivalents at end of period	224.9	[2]	202.7
Supplemental disclosure of cash flow information:
Interest paid	45.9		18.6
Income taxes paid	$ 29.9		$ 17
[1]	Condensed from audited financial statements
[2]	Unaudited

Basis of Presentation and Summa

Basis of Presentation and Summary of Significant Accounting Policies	9 Months Ended
	Sep. 27, 2015
Basis of Presentation and Summary of Significant Accounting Policies [Abstract]
Basis of Presentation and Summary of Significant Accounting Policies	Note 1. Basis of Presentation and The accompanying unaudited condensed consolidated financial statements have been prepared by management of Minerals Technologies Inc. (the “Company”, “MTI”, “we” or “us”) in accordance with the rules and regulations of the United States Securities and Exchange Commission. Accordingly, certain information and footnote disclosures normally included in financial statements prepared in accordance with U.S. generally accepted accounting principles have been condensed or omitted. Therefore, these financial statements should be read in conjunction with the consolidated financial statements and notes thereto contained in the Company's Annual Report on Form 10-K for the year ended December 31, 2014. In the opinion of management, all adjustments, consisting solely of normal recurring adjustments necessary for a fair presentation of the financial information for the periods indicated, have been included. The results for the three-month and nine-month periods ended September 27, 2015 are not necessarily indicative of the results that may be expected for the year ending December 31, 2015. Company Operations The Company is a resource- and technology-based company that develops, produces and markets worldwide a broad range of specialty mineral, mineral-based and synthetic mineral products and supporting systems and services. On May 9, 2014, the Company acquired AMCOL International Corporation (“AMCOL”). See Note 2 to the Condensed Consolidated Financial Statements. The prior year condensed consolidated statements of income include operational results of the acquired AMCOL business from May 9, 2014 through September 28, 2014. The Company has 5 reportable segments: Specialty Minerals, Refractories, Performance Materials, Construction Technologies, and Energy Services. - - The Refractories segment produces and markets monolithic and shaped refractory materials and specialty products, services and application and measurement equipment, and calcium metal and metallurgical wire products. - The Performance Materials segment is a leading supplier of bentonite and bentonite-related products. This segment also supplies chromite and leonardite and operates more than 25 mining or production facilities worldwide. - The Construction Technologies segment provides products for non-residential construction, environmental and infrastructure projects worldwide. It serves customers engaged in a broad range of construction projects, including site remediation, concrete waterproofing for underground structures, liquid containment on projects ranging from landfills to flood control, and drilling applications including foundation, slurry wall, tunneling, water well, and horizontal drilling. - The Energy Services segment provides services to improve the production, costs, compliance, and environmental impact of activities performed in oil and gas industry. This segment offers a range of patented and unpatented technologies, products and services for all phases of oil and gas production, refining, and storage throughout the world. Use of Estimates The Company employs accounting policies that are in accordance with U.S. generally accepted accounting principles and require management to make estimates and assumptions relating to the reporting of assets and liabilities and the disclosure of contingent assets and liabilities at the date of the consolidated financial statements and the reported amounts of revenue and expenses during the reported period. Significant estimates include those related to revenue recognition, valuation of accounts receivable, valuation of inventories, valuation of long-lived assets, goodwill and other intangible assets, pension plan assumptions, valuation of product liability and asset retirement obligation, income tax, income tax valuation allowances, and litigation and environmental liabilities. Actual results could differ from those estimates.

Business Combination

Business Combination	9 Months Ended
	Sep. 27, 2015
Business Combination [Abstract]
Business Combination	Note 2. Business Combination On May 9, 2014, pursuant to the Merger Agreement dated March 10, 2014, the Company acquired AMCOL, based in Hoffman Estates, Illinois, a leading international producer of specialty materials and related products and services for industrial and consumer markets. The Company and AMCOL are both world-renowned innovators in mineralogy, fine particle technology and polymer chemistry. This transaction brings together the global leaders in precipitated calcium carbonate and bentonite, creating an even more robust US-based international minerals supplier. The Company’s management believes that the acquisition of AMCOL will provide substantial synergies through enhanced operational cost efficiencies. The Company acquired AMCOL by completing a tender offer to purchase AMCOL’s outstanding shares of common stock and the subsequent merger of AMCOL with and into a wholly-owned subsidiary of MTI. At the expiration of the Company’s tender offer, each tendered share of AMCOL common stock was purchased for consideration equal to $45.75 in cash, and at the effective time of the back-end merger, each share of AMCOL common stock not tendered (other than shares owned by the Company or held by AMCOL in treasury) was converted into the right to receive consideration equal to $45.75 in cash. Upon completion of the merger, AMCOL became a wholly owned direct subsidiary of MTI. Through the tender offer and the merger, the Company paid $1,519.4 million in cash to acquire all of the outstanding shares of AMCOL. In connection with the acquisition of AMCOL, the Company entered into a $1,560.0 million senior secured term loan facility (the “Term Facility”), the net proceeds of which, together with the Company’s cash on hand, were used as cash consideration for the acquisition of AMCOL and to refinance certain existing indebtedness of the Company and AMCOL and to pay fees and expenses in connection with the foregoing. See Note 9 to the Condensed Consolidated Financial Statements. The fair value of the total consideration transferred, net of cash acquired, was $1,802.3 million and comprised of the following: (millions of dollars) Cash consideration transferred to AMCOL shareholders $ 1,519.4 AMCOL notes repaid at close 325.6 Total consideration transferred to debt and equity holders 1,845.0 Cash acquired 42.7 Total consideration transferred to debt and equity holders, net of cash acquired $ 1,802.3 The acquisition of AMCOL has been accounted for using the acquisition method of accounting, which requires, among other things, the assets acquired and liabilities assumed be recognized at their respective fair values as of the acquisition date. As of May 9, 2015, the Company has completed its assessment of property, certain reserves (including environmental, legal, and tax matters), obligations and deferred taxes, as well as our review of AMCOL’s existing accounting policies. The purchase price allocation has been finalized. The following table summarizes the final amounts recognized for assets acquired and liabilities assumed as of the acquisition date, as well as adjustments made in 2015 to the amounts initially recorded in 2014 (measurement period adjustments). The measurement period adjustments did not have a significant impact on our consolidated statements of income, balance sheets or cash flows in any period and therefore, we have not retrospectively adjusted our financial statements. Preliminary Allocation Previously Reported on Form 10-K as of December 2014 Increase/ Decrease Final Allocation (millions of dollars) (millions of dollars) (millions of dollars) Accounts receivable $ 235.7 $ - $ 235.7 Inventories 157.3 - 157.3 Other current assets 65.0 - 65.0 Mineral rights 535.5 - 535.5 Plant, property and equipment 371.2 - 371.2 Goodwill 708.1 12.8 720.9 Intangible assets 214.3 8.8 223.1 Other non-current assets 51.4 9.2 60.6 Total assets acquired $ 2,338.5 $ 30.8 $ 2,369.3 Accounts payable 66.4 - 66.4 Accrued expenses 61.6 - 61.6 Non-current deferred tax liability 322.3 1.5 323.8 Other non-current liabilities 85.9 29.3 115.2 Total liabilities assumed $ 536.2 $ 30.8 $ 567.0 Net assets acquired $ 1,802.3 $ - $ 1,802.3 The Company used the income, market, or cost approach (or a combination thereof) for the valuation, and used valuation inputs and analyses that were based on market participant assumptions. Market participants are considered to be buyers and sellers unrelated to the Company in the principal or most advantageous market for the asset or liability. For certain items, the carrying value was determined to be a reasonable approximation of fair value based on the information available. The Company’s estimates related to this valuation are considered to be critical accounting estimates because they are susceptible to change from period to period based on our judgments about a variety of factors and due to the uncontrollable variability of market factors underlying them. For example, in performing assessments of the fair value of these assets, the Company makes judgments about the future performance business of the acquired business, economic, regulatory, and political conditions affecting the net assets acquired, appropriate risk-related rates for discounting estimated future cash flows, reasonable estimates of disposal values, and market royalty rate. Goodwill was calculated as the excess of the consideration transferred over the assets acquired and represents the estimated future economic benefits arising from other assets acquired that could not be individually identified and separately recognized. The goodwill is primarily attributable to fair value of expected synergies from combining the MTI and AMCOL businesses and will be allocated to the Performance Materials and Construction Technologies segments. Goodwill recognized as a result of this acquisition is not deductible for tax purposes. In connection with the acquisition, the Company recorded an additional deferred tax liability of $323.8 Mineral rights were valued using discounted cash flow method, a Level 3 fair value input. Plant, property and equipment were valued using the cost method adjusted for age and deterioration, also a Level 3 fair value input. Intangible assets acquired mainly included technology and trade names. Technology was valued using relief-from royalty method, a Level 3 fair value input, with a weighted average amortization period of 12 years. Trade names were valued using multi-period excess earnings, also a Level 3 fair value input, with a weighted average amortization period of 34 years. The Company incurred $2.4 $8.5 The accompanying Condensed Consolidated Statements of Income include the results of operations of the acquired AMCOL businesses for the nine months ended September 28, 2014 commencing as of May 9, 2014. The nine months ended September 28, 2014 include net sales of $451.7 $48.1 million The following table presents the unaudited summary of the Company’s Condensed Consolidated Statements of Income for the nine months ended September 27, 2015 and the unaudited pro forma summary of the Company’s Condensed Consolidated Statements of Income for the nine months ended September 28, 2014, which includes AMCOL’s Statement of Operations for the respective periods, as if the acquisition and related financing occurred on January 1, 2014. The following unaudited pro forma financial information is not necessarily indicative of the results of operations as they would have been had the transaction occurred on the assumed date, nor is it necessarily an indication of trends in future results for a number of reasons, including, but not limited to, differences between the assumptions used to prepare the pro forma information, potential synergies, and cost savings from operating efficiencies. Nine Months Ended Sept. 27, Sept. 28, Pro Forma (millions of dollars) Net sales $ 1,367.6 $ 1,582.6 Income from continuing operations before provision for taxes and equity in earnings 118.3 125.9 Income from continuing operations, net of tax 93.9 85.6 The income from continuing operations before provision for taxes and equity in earnings for the nine months ended September 27, 2015, in the table above, includes restructuring and impairment charges of $27.3 million, extinguishment of debt costs of $4.5 The income from continuing operations, net of tax, in the table above, is calculated using a tax rate of 28% for all pro forma periods. The unaudited pro forma financial information presented in the table include certain adjustments that are factually supportable, directly related to business combination, and expected to have a continuing impact. These adjustments include, but are not limited to, depreciation, depletion, and amortization expense based upon the preliminary fair value step-up of depreciable fixed assets and amortizable intangibles assets, interest expense on acquisition related debt, acquisition-related transaction and integration costs, and restructuring charges.

Earnings Per Share (EPS)

Earnings Per Share (EPS)	9 Months Ended
	Sep. 27, 2015
Earnings Per Share (EPS) [Abstract]
Earnings Per Share (EPS)	Note 3. Earnings Per Share (EPS) Basic earnings per share are based upon the weighted average number of common shares outstanding during the period. Diluted earnings per share are based upon the weighted average number of common shares outstanding during the period assuming the issuance of common shares for all potentially dilutive common shares outstanding. The following table sets forth the computation of basic and diluted earnings per share: Three Months Ended Nine Months Ended Sept. 27, Sept. 28, Sept. 27, Sept. 28, (in millions, except per share data) Basic EPS Amounts attributable to MTI Income from continuing operations $ 29.2 $ 36.8 $ 91.0 $ 69.1 Income from discontinued operations - 0.2 - 2.0 Net income $ 29.2 $ 37.0 $ 91.0 $ 71.1 Weighted average shares outstanding 34.7 34.5 34.7 34.5 Earnings per share attributable to MTI Continuing operations $ 0.84 $ 1.07 $ 2.62 $ 2.00 Discontinued operations - - - 0.06 Net income $ 0.84 $ 1.07 $ 2.62 $ 2.06 Diluted EPS Amounts attributable to MTI Income from continuing operations $ 29.2 $ 36.8 $ 91.0 $ 69.1 Income from discontinued operations - 0.2 - 2.0 Net income $ 29.2 $ 37.0 $ 91.0 $ 71.1 Weighted average shares outstanding 34.7 34.5 34.7 34.5 Dilutive effect of stock options and stock units 0.3 0.3 0.3 0.3 Weighted average shares outstanding, adjusted 35.0 34.8 35.0 34.8 Earnings per share attributable to MTI Continuing operations $ 0.83 $ 1.06 $ 2.60 $ 1.99 Discontinued operations - - - 0.06 Net income $ 0.83 $ 1.06 $ 2.60 $ 2.05 Options to purchase 395,545 shares and 173,068

Restructuring Charges

Restructuring Charges	9 Months Ended
	Sep. 27, 2015
Restructuring Charges [Abstract]
Restructuring Charges	Note 4. Restructuring Charges During 2014, the Company announced a restructuring program that will result in a 10% permanent reduction of its workforce. The reductions include elimination of duplicate corporate functions, deployment of our shared service model, and consolidation and alignment of various corporate functions and regional locations across the Company. At September 27, 2015, we had $7.0 million included within accrued liabilities within our Condensed Consolidated Balance Sheets for cash expenditures needed to satisfy remaining obligations under these workforce reduction initiatives. The Company expects to pay these amounts by the end of March 2016 The following table is a reconciliation of our restructuring liability balance as of September 27, 2015: (millions of dollars) Restructuring liability, December 31, 2014 $ 14.6 Additional provisions 6.2 Cash payments (10.9 ) Other adjustments (2.9 ) Restructuring liability, Sept. 27, 2015 $ 7.0 The following table outlines the amount of restructuring charges recorded within the Consolidated Statements of Income. Three Months Ended Nine Months Ended (millions of dollars) Sept. 27, Sept. 28, Sept. 27, Sept. 28, Restructuring Charges $ 5.2 $ 5.8 $ 6.2 $ 11.8 Impairment of Assets 5.3 - 21.1 - Total restructuring and other charges $ 10.5 $ 5.8 $ 27.3 $ 11.8 During the third quarter and first nine months of 2015, the Company incurred impairment charges of $5.3 million and $21.1 million, respectively, million, respectively,

Discontinued Operations

Discontinued Operations	9 Months Ended
	Sep. 27, 2015
Discontinued Operations [Abstract]
Discontinued Operations	Note 5. Discontinued Operations During the second quarter of 2013, the Company ceased its operations at its Paper PCC merchant plant in Walsum, Germany and reclassified such operations as discontinued. These operations were part of the Company's Specialty Minerals segment. During the nine months ended September 28, 2014, the Company reversed a facility closure accrual of $1.8 million, net of $0.6 million tax expense, resulting from the settlement of a contractual obligation.

Income Taxes

Income Taxes	9 Months Ended
	Sep. 27, 2015
Income Taxes [Abstract]
Income Taxes	Note 6. Income Taxes As of September 27, 2015, the Company had approximately $6.2 million of total unrecognized income tax benefits. Included in this amount were a total of $3.7 million of unrecognized income tax benefits that, if recognized, would affect the Company’s effective tax rate. While it is expected that the amount of unrecognized tax benefits will change in the next 12 months, the Company does not expect the change to have a significant impact on the results of operations or the financial position of the Company. The Company’s accounting policy is to recognize interest and penalties accrued relating to unrecognized income tax benefits as part of its provision for income taxes. The Company had a net increase of approximately $0.1 million and $0.4 million during the three and nine months ended September 27, 2015, respectively, and had an accrued balance of $1.7 million of interest and penalties as of September 27, 2015. The Company operates in multiple taxing jurisdictions, both within and outside the U.S. In certain situations, a taxing authority may challenge positions that the Company has adopted in its income tax filings. The Company, with a few exceptions (none of which are material), is no longer subject to income tax examinations by tax authorities for years prior to 2007

Inventories

Inventories	9 Months Ended
	Sep. 27, 2015
Inventories [Abstract]
Inventories	Note 7. Inventories The following is a summary of inventories by major category: Sept. 27, December 31, (millions of dollars) Raw materials $ 79.3 $ 85.9 Work-in-process 5.7 6.7 Finished goods 88.3 88.7 Packaging and supplies 30.3 30.5 Total inventories $ 203.6 $ 211.8

Goodwill and Other Intangible A

Goodwill and Other Intangible Assets	9 Months Ended
	Sep. 27, 2015
Goodwill and Other Intangible Assets [Abstract]
Goodwill and Other Intangible Assets	Note 8. Goodwill and Other Intangible Assets Goodwill and other intangible assets with indefinite lives are not amortized, but instead are assessed for impairment, at least annually. The carrying amount of goodwill was $789.2 million, and $770.9 million as of September 27, 2015 and December 31, 2014, respectively. The net change in goodwill since December 31, 2014 was attributable to the finalization of the accounting related to the acquisition of AMCOL and to the effects of foreign exchange. Acquired intangible assets subject to amortization as of September 27, 2015 and December 31, 2014 were as follows: September 27, 2015 December 31, 2014 Weighted Average Useful Life (Years) Gross Accumulated Gross Accumulated (millions of dollars) Tradenames 34 $ 199.8 $ 8.0 $ 191.2 $ 3.7 Technology 12 18.8 2.2 18.7 1.0 Patents and trademarks 17 6.4 4.3 6.4 4.0 Customer relationships 30 4.5 0.5 4.4 0.1 Customer lists 15 2.9 2.8 2.9 2.7 28 $ 232.4 $ 17.8 $ 223.6 $ 11.5 During the nine month period ended September 27, 2015, intangible assets increased approximately $8.8 million relating to the finalization of the AMCOL opening balance sheet. The weighted average amortization period for acquired intangible assets subject to amortization is approximately 28 years. Estimated amortization expense is $8.2 million for 2015–2016, $8.0 million for 2017, $7.8 million for 2018-2020 and $184.6 million thereafter.

Long-Term Debt and Commitments

Long-Term Debt and Commitments	9 Months Ended
	Sep. 27, 2015
Long-Term Debt and Commitments [Abstract]
Long-Term Debt and Commitments	Note 9. Long-Term Debt and Commitments The following is a summary of long-term debt: Sept. 27, December 31, (millions of dollars) Term Loan Facility, net of unamortized discount of $12.2 million due May 9, 2021 $ 1,315.8 $ 1,454.0 China Loan Facilities 12.0 1.8 Total $ 1,327.8 $ 1,455.8 Less: Current maturities 2.2 0.3 Long-term debt $ 1,325.6 $ 1,455.5 On May 9, 2014, in connection with the acquisition of AMCOL, On June 23, 2015, the Company entered into an amendment to the credit agreement to reprice the $1.378 billion then outstanding on the Term Facility. As amended, the Term Facility has a $1,078 million floating rate tranche and a $300 million fixed rate tranche. The maturity date for loans under the Term Facility was not changed by the amendment. The loans outstanding under the Term Facility will mature on May 9, 2021 and the loans outstanding (if any) and commitments under the Revolving Facility will mature and terminate, as the case may be, on May 9, 2019. After the amendment, loans under the variable rate tranche of the Term Facility bear interest at a rate equal to an adjusted LIBOR rate LIBOR rate The credit agreement contains certain customary affirmative and negative covenants that limit or restrict the ability of the Company and its restricted subsidiaries to enter into certain transactions or take certain actions. In addition, the credit agreement contains a financial covenant that requires the Company, if on the last day of any fiscal quarter loans or letters of credit were outstanding under the Revolving Facility (excluding up to $15 million of letters of credit), to maintain a maximum net leverage ratio (as defined in the credit agreement) of, initially, 5.25 to 1.00 for the four fiscal quarter period preceding such day. Such maximum net leverage ratio requirement is subject to decrease during the duration of the facility to a minimum level (when applicable) of 3.50 to 1.00. As of September 27, 2015, there were no and $9.3 During 2014, the Company entered into three committed loan facilities for the funding of new manufacturing facilities in China. The loan facilities were for a combined 73.8 million RMB and $1.8 million. During the third quarter of 2015, the Company entered into an additional committed loan facility for the funding of these facilities. The loan facility is for 27.8 million RMB. As of September 27, 2015, 13.3 $12.1 During the first nine months of 2015, the Company repaid $140.2 As of September 27, 2015, the Company had $35.4 $6.2

Benefit Plans

Benefit Plans	9 Months Ended
	Sep. 27, 2015
Benefit Plans [Abstract]
Benefit Plans	Note 10. Benefit Plans The Company and its subsidiaries have pension plans covering the majority of eligible employees on a contributory or non-contributory basis. The Company also provides postretirement health care and life insurance benefits for the majority of its U.S. retired employees. Disclosures for the U.S. plans have been combined with those outside of the U.S. as the international plans do not have significantly different assumptions, and together represent less than 25% of our total benefit obligation. In May 2014, as a part of its acquisition of AMCOL businesses, the Company assumed AMCOL’s qualified defined benefit pension plan and supplementary pension plan (SERP). The defined benefit pension plan covered substantially all of AMCOL’s domestic employees hired before January 1, 2004. The SERP plan provides benefit in excess of qualified plan limitation for certain employees. For more information on the AMCOL acquisition, see Note 2 to the Condensed Consolidated Financial Statements. Components of Net Periodic Benefit Cost Pension Benefits Three Months Ended Nine Months Ended Sept. 27, Sept. 28, Sept. 27, Sept. 28, (millions of dollars Service cost $ 2.8 $ 2.1 $ 8.1 $ 6.5 Interest cost 3.7 4.0 11.6 10.8 Expected return on plan assets (4.9 ) (5.0 ) (14.9 ) (14.2 ) Amortization: Prior service cost 0.1 0.3 0.6 0.9 Recognized net actuarial loss 3.2 1.9 8.9 5.4 Net periodic benefit cost $ 4.9 $ 3.3 $ 14.3 $ 9.4 Other Benefits Three Months Ended Nine Months Ended Sept. 27, Sept. 28, Sept. 27, Sept. 28, (millions of dollars Service cost $ 0.1 $ - $ 0.3 $ 0.3 Interest cost 0.1 0.1 0.3 0.3 Amortization: Prior service cost (0.7 ) (0.8 ) (2.3 ) (2.3 ) Recognized net actuarial (gain)/loss (0.1 ) (0.1 ) (0.1 ) (0.2 ) Net periodic benefit cost $ (0.6 ) $ (0.8 ) $ (1.8 ) $ (1.9 ) Amortization amounts of prior service costs and recognized net actuarial losses are recorded, net of tax, as increases to accumulated other comprehensive income. Employer Contributions The Company expects to contribute approximately $9.0 $1.0 $7.2 $0.3

Comprehensive Income

Comprehensive Income	9 Months Ended
	Sep. 27, 2015
Comprehensive Income [Abstract]
Comprehensive Income	Note 11. Comprehensive Income The following table summarizes the amounts reclassified out of accumulated other comprehensive income (loss) attributable to the Company: Amounts Reclassified Out of Accumulated Other Comprehensive Income (Loss) Three Months Ended Nine Months Ended Sept. 27, Sept. 28, Sept. 27, Sept. 28, (millions of dollars) Amortization of pension items: Pre-tax amount $ 2.5 $ 1.3 $ 7.1 $ 3.8 Tax (0.9 ) (0.5 ) (2.5 ) (1.3 ) Net of tax $ 1.6 $ 0.8 $ 4.6 $ 2.5 The pre-tax amounts in the table above are included within the components of net periodic pension benefit cost (see Note 10) and the tax amounts are included within provision for taxes on income line within Condensed Consolidated Statements of Income. The major components of accumulated other comprehensive income, net of related tax, attributable to MTI are as follows: Foreign Currency Translation Adjustment Unrecognized Pension Costs Net Gain on Cash Flow Hedges Total (millions of dollars) Balance as of December 31, 2014 $ (33.4 ) $ (82.1 ) $ 2.6 $ (112.9 ) Other comprehensive income (loss) before reclassifications (65.0 ) - - (65.0 ) Amounts reclassified from AOCI - 4.6 - 4.6 Net current period other comprehensive income(loss) (65.0 ) 4.6 - (60.4 ) Balance as of September 27, 2015 $ (98.4 ) $ (77.5 ) $ 2.6 $ (173.3 )

Accounting for Asset Retirement

Accounting for Asset Retirement Obligations	9 Months Ended
	Sep. 27, 2015
Accounting for Asset Retirement Obligations [Abstract]
Accounting for Asset Retirement Obligations	Note 12. Accounting for Asset Retirement Obligations The Company records asset retirement obligations for situations in which the Company will be required to incur costs to retire tangible long-lived assets. The fair value of the liability for an asset retirement obligation is recognized in the period in which it is incurred if a reasonable estimate of fair value can be made. The Company also records liabilities related to land reclamation as a part of asset retirement obligations. The Company mines various minerals using a surface mining process that requires the removal of overburden. In certain areas and under various governmental regulations, the Company is obligated to restore the land comprising each mining site to its original condition at the completion of the mining activity. The obligation is adjusted to reflect the passage of time, mining activities, and changes in estimated future cash outflows. The following is a reconciliation of asset retirement obligations as of September 27, 2015: (millions of dollars) Asset retirement liability, December 31, 2014 $ 23.0 Accretion expense 2.5 Reversals (0.5 ) Payments (1.5 ) Foreign currency translation (1.3 ) Asset retirement liability, September 27, 2015 $ 22.2 The asset retirement costs are capitalized as part of the carrying amount of the associated asset. The current portion of the liability of approximately $1.8 20.3

Contingencies

Contingencies	9 Months Ended
	Sep. 27, 2015
Contingencies [Abstract]
Contingencies	Note 13. Contingencies We are party to a number of lawsuits arising in the normal course of our business. On May 8, 2013, Armada (Singapore) PTE Limited, an ocean shipping company now in bankruptcy ("Armada") filed a case in federal court in the Northern District of Illinois against AMCOL and certain of its subsidiaries ( Armada (Singapore) PTE Limited v. AMCOL International Corp., et al., United States District Court for the Northern District of Illinois Certain of the Company's subsidiaries are among numerous defendants in a number of cases seeking damages for exposure to silica or to asbestos containing materials. The Company currently has 31 pending silica cases and 12 pending asbestos cases. To date, 1,464 silica cases and 46 asbestos cases have been dismissed, not including any lawsuits against AMCOL or American Colloid Company dismissed prior to our acquisition of AMCOL. One new asbestos case and no new silica cases were filed in the third quarter of 2015. Two asbestos cases and 43 silica cases were dismissed during the third quarter of 2015. Most of these claims do not provide adequate information to assess their merits, the likelihood that the Company will be found liable, or the magnitude of such liability, if any. Additional claims of this nature may be made against the Company or its subsidiaries. At this time management anticipates that the amount of the Company's liability, if any, and the cost of defending such claims, will not have a material effect on its financial position or results of operations. The Company has settled only one silica lawsuit, for a nominal amount, and no asbestos lawsuits to date (not including any that may have been settled by AMCOL prior to completion of the acquisition). We are unable to state an amount or range of amounts claimed in any of the lawsuits because state court pleading practices do not require identifying the amount of the claimed damage. The aggregate cost to the Company for the legal defense of these cases since inception continues to be insignificant. The majority of the costs of defense for these cases, excluding cases against AMCOL or American Colloid, are reimbursed by Pfizer Inc. pursuant to the terms of certain agreements entered into in connection with the Company's initial public offering in 1992. Of the 13 pending asbestos cases all except one allege liability based on products sold largely or entirely prior to the initial public offering, and for which the Company is therefore entitled to indemnification pursuant to such agreements. The one exception pertains to a newly filed asbestos case against American Colloid Company. Our experience has been that the Company is not liable to plaintiffs in any of these lawsuits and the Company does not expect to pay any settlements or jury verdicts in these lawsuits. On February 20, 2015, a collective action lawsuit alleging a failure to comply with the Fair Labor Standards Act ("FLSA") was filed titled David Vidrine vs. CETCO Energy Services Company LLC in the U.S. District Court for the Southern District of Texas, Corpus Christie Division (“Vidrine”). We have accrued an estimate of potential damages for the Vidrine lawsuit, the amount of which was not material to our financial position, results of operations or cash flows. Environmental Matters On April 9, 2003, the Connecticut Department of Environmental Protection issued an administrative consent order relating to our Canaan, Connecticut, plant where both our Refractories segment and Specialty Minerals segment have operations. We agreed to the order, which includes provisions requiring investigation and remediation of contamination associated with historic use of polychlorinated biphenyls ("PCBs") and mercury at a portion of the site. We have completed the required investigations and submitted several reports characterizing the contamination and assessing site-specific risks. We are awaiting regulators’ approval of the risk assessment report, which will form the basis for a proposal by the Company concerning eventual remediation. We believe that the most likely form of overall site remediation will be to leave the existing contamination in place (with some limited soil removal), encapsulate it, and monitor the effectiveness of the encapsulation. We anticipate that a substantial portion of the remediation cost will be borne by the United States based on its involvement at the site from 1942 – 1964, as historic documentation indicates that PCBs and mercury were first used at the facility at a time of U.S. government ownership for production of materials needed by the military. Pursuant to a Consent Decree entered on October 24, 2014, the United States paid the Company $2.3 million in the 4 th The Company is evaluating options for upgrading the wastewater treatment facilities at its Adams, Massachusetts plant. This work has been undertaken pursuant to an administrative Consent Order originally issued by the Massachusetts Department of Environmental Protection (“DEP”) on June 18, 2002. This order was amended on June 1, 2009 and on June 2, 2010. The amended Order includes the investigation by January 1, 2022 of options for ensuring that the facility's wastewater treatment ponds will not result in unpermitted discharge to groundwater. Additional requirements of the amendment include the submittal by July 1, 2022 of a plan for closure of a historic lime solids disposal area. Preliminary engineering reviews completed in 2005 indicate that the estimated cost of wastewater treatment upgrades to operate this facility beyond 2024 may be between $6 million and $8 million. The Company estimates that the remaining remediation costs would approximate $0.4 million, which has been accrued as of September 27, 2015. The Company and its subsidiaries are not party to any other material pending legal proceedings, other than routine litigation incidental to their businesses.

Non-controlling interests

Non-controlling interests	9 Months Ended
	Sep. 27, 2015
Non-controlling interests [Abstract]
Non-controlling interests	Note 14. Non-controlling interests The following is a reconciliation of beginning and ending total equity, equity attributable to MTI, and equity attributable to non-controlling interests: Equity Attributable to MTI Common Additional Retained Accumulated Treasury Non-controlling Total (millions of dollars) Balance as of December 31, 2014 $ 4.8 $ 373.0 $ 1,191.8 $ (112.9 ) $ (593.7 ) $ $ 25.9 $ 888.9 Net income - - 91.0 - - 2.9 93.9 Other comprehensive income (loss) - - - (60.4 ) - (1.1 ) (61.5 ) Dividends declared - - (5.4 ) - - - (5.4 ) Dividends to non-controlling interest - - - - - (0.9 ) (0.9 ) Issuance of shares pursuant to employee stock compensation plans - 1.3 - - - - 1.3 Income tax benefit arising from employee stock compensation plans - 0.8 - - - - 0.8 Stock based compensation - 7.6 - - - - 7.6 Balance as of September 27, 2015 $ 4.8 $ 382.7 $ 1,277.4 $ (173.3 ) $ (593.7 ) $ 26.8 $ 924.7 The income attributable to non-controlling interests for the nine-month periods ended September 27, 2015 and September 28, 2014 was from continuing operations. The remainder of income was attributable to MTI.

Segment and Related Information

Segment and Related Information	9 Months Ended
	Sep. 27, 2015
Segment and Related Information [Abstract]
Segment and Related Information	Note 15. Segment and Related Information The Company has 5 reportable segments: Specialty Minerals, Refractories, Performance Materials, Construction Technologies, and Energy Services. Three Months Ended Nine Months Ended Sept. 27, Sept. 28, Sept. 27, Sept. 28, (millions of dollars) Net Sales Specialty Minerals $ 156.5 $ 163.0 $ 466.9 $ 490.5 Refractories 77.4 90.4 227.7 266.8 Performance Materials 126.5 135.6 383.5 211.4 Construction Technologies 49.7 69.1 140.7 106.3 Energy Services 40.9 85.4 148.8 134.0 Total $ 451.0 $ 543.5 $ 1,367.6 $ 1,209.0 Income from Operations Specialty Minerals $ 25.0 $ 26.0 $ 75.2 $ 71.4 Refractories 7.9 9.7 24.5 29.0 Performance Materials 22.7 18.7 72.0 23.0 Construction Technologies 6.1 8.3 18.5 9.0 Energy Services (7.9 ) 10.2 (14.2 ) 16.1 Total $ 53.8 $ 72.9 $ 176.0 $ 148.5 A reconciliation of the totals reported for the operating segments to the applicable line items in the condensed consolidated financial statements is as follows: Income from operations before provision for taxes on income Three Months Ended Nine Months Ended Sept. 27, Sept. 28, Sept. 27, Sept. 28, (millions of dollars) Income from operations for reportable segments $ 53.8 $ 72.9 $ 176.0 $ 148.5 Acquisition Related Transaction and Integration Costs (2.4 ) (4.2 ) (8.5 ) (16.7 ) Unallocated corporate expenses (1.5 ) (1.9 ) (4.9 ) (5.6 ) Consolidated income from operations 49.9 66.8 162.6 126.2 Non-operating deductions, net (11.7 ) (15.1 ) (44.3 ) (30.5 ) Income from continuing operations before provision for taxes on income $ 38.2 $ 51.7 $ 118.3 $ 95.7 The Company's sales by product category are as follows: Three Months Ended Nine Months Ended Sept. 27, Sept. 28, Sept. 27, Sept. 28, (millions of dollars) Paper PCC $ 106.1 $ 113.4 $ 315.9 $ 341.3 Specialty PCC 15.8 16.5 48.5 50.7 Talc 13.9 13.8 41.9 41.7 Ground Calcium Carbonate 20.7 19.3 60.6 56.8 Refractory Products 60.5 69.7 178.3 201.4 Metallurgical Products 16.9 20.7 49.4 65.4 Metalcasting 63.4 70.0 200.3 109.4 Household, Personal Care and Specialty Products 43.0 42.8 126.6 66.2 Basic Minerals and Other Products 20.1 22.8 56.6 35.8 Environmental Products 21.7 34.5 55.2 51.8 Building Materials and Other Products 28.0 34.6 85.5 54.5 Energy Services 40.9 85.4 148.8 134.0 Total $ 451.0 $ 543.5 $ 1,367.6 $ 1,209.0

Basis of Presentation and Sum22

Basis of Presentation and Summary of Significant Accounting Policies (Policies)	9 Months Ended
	Sep. 27, 2015
Basis of Presentation and Summary of Significant Accounting Policies [Abstract]
Basis of Presentation	The accompanying unaudited condensed consolidated financial statements have been prepared by management of Minerals Technologies Inc. (the “Company”, “MTI”, “we” or “us”) in accordance with the rules and regulations of the United States Securities and Exchange Commission. Accordingly, certain information and footnote disclosures normally included in financial statements prepared in accordance with U.S. generally accepted accounting principles have been condensed or omitted. Therefore, these financial statements should be read in conjunction with the consolidated financial statements and notes thereto contained in the Company's Annual Report on Form 10-K for the year ended December 31, 2014. In the opinion of management, all adjustments, consisting solely of normal recurring adjustments necessary for a fair presentation of the financial information for the periods indicated, have been included. The results for the three-month and nine-month periods ended September 27, 2015 are not necessarily indicative of the results that may be expected for the year ending December 31, 2015.
Use of Estimates	Use of Estimates The Company employs accounting policies that are in accordance with U.S. generally accepted accounting principles and require management to make estimates and assumptions relating to the reporting of assets and liabilities and the disclosure of contingent assets and liabilities at the date of the consolidated financial statements and the reported amounts of revenue and expenses during the reported period. Significant estimates include those related to revenue recognition, valuation of accounts receivable, valuation of inventories, valuation of long-lived assets, goodwill and other intangible assets, pension plan assumptions, valuation of product liability and asset retirement obligation, income tax, income tax valuation allowances, and litigation and environmental liabilities. Actual results could differ from those estimates.

Business Combination (Tables)

Business Combination (Tables)	9 Months Ended
	Sep. 27, 2015
Business Combination [Abstract]
Schedule total consideration transferred	The fair value of the total consideration transferred, net of cash acquired, was $1,802.3 million and comprised of the following: (millions of dollars) Cash consideration transferred to AMCOL shareholders $ 1,519.4 AMCOL notes repaid at close 325.6 Total consideration transferred to debt and equity holders 1,845.0 Cash acquired 42.7 Total consideration transferred to debt and equity holders, net of cash acquired $ 1,802.3
Summary of preliminary purchase price allocation for the AMCOL acquisition	The following table summarizes the final amounts recognized for assets acquired and liabilities assumed as of the acquisition date, as well as adjustments made in 2015 to the amounts initially recorded in 2014 (measurement period adjustments). The measurement period adjustments did not have a significant impact on our consolidated statements of income, balance sheets or cash flows in any period and therefore, we have not retrospectively adjusted our financial statements. Preliminary Allocation Previously Reported on Form 10-K as of December 2014 Increase/ Decrease Final Allocation (millions of dollars) (millions of dollars) (millions of dollars) Accounts receivable $ 235.7 $ - $ 235.7 Inventories 157.3 - 157.3 Other current assets 65.0 - 65.0 Mineral rights 535.5 - 535.5 Plant, property and equipment 371.2 - 371.2 Goodwill 708.1 12.8 720.9 Intangible assets 214.3 8.8 223.1 Other non-current assets 51.4 9.2 60.6 Total assets acquired $ 2,338.5 $ 30.8 $ 2,369.3 Accounts payable 66.4 - 66.4 Accrued expenses 61.6 - 61.6 Non-current deferred tax liability 322.3 1.5 323.8 Other non-current liabilities 85.9 29.3 115.2 Total liabilities assumed $ 536.2 $ 30.8 $ 567.0 Net assets acquired $ 1,802.3 $ - $ 1,802.3
Unaudited pro forma summary of Condensed Consolidated Statements of Income	The following table presents the unaudited summary of the Company’s Condensed Consolidated Statements of Income for the nine months ended September 27, 2015 and the unaudited pro forma summary of the Company’s Condensed Consolidated Statements of Income for the nine months ended September 28, 2014, which includes AMCOL’s Statement of Operations for the respective periods, as if the acquisition and related financing occurred on January 1, 2014. The following unaudited pro forma financial information is not necessarily indicative of the results of operations as they would have been had the transaction occurred on the assumed date, nor is it necessarily an indication of trends in future results for a number of reasons, including, but not limited to, differences between the assumptions used to prepare the pro forma information, potential synergies, and cost savings from operating efficiencies. Nine Months Ended Sept. 27, Sept. 28, Pro Forma (millions of dollars) Net sales $ 1,367.6 $ 1,582.6 Income from continuing operations before provision for taxes and equity in earnings 118.3 125.9 Income from continuing operations, net of tax 93.9 85.6

Earnings Per Share (EPS) (Table

Earnings Per Share (EPS) (Tables)	9 Months Ended
	Sep. 27, 2015
Earnings Per Share (EPS) [Abstract]
Schedule of basic and diluted earnings per share	The following table sets forth the computation of basic and diluted earnings per share: Three Months Ended Nine Months Ended Sept. 27, Sept. 28, Sept. 27, Sept. 28, (in millions, except per share data) Basic EPS Amounts attributable to MTI Income from continuing operations $ 29.2 $ 36.8 $ 91.0 $ 69.1 Income from discontinued operations - 0.2 - 2.0 Net income $ 29.2 $ 37.0 $ 91.0 $ 71.1 Weighted average shares outstanding 34.7 34.5 34.7 34.5 Earnings per share attributable to MTI Continuing operations $ 0.84 $ 1.07 $ 2.62 $ 2.00 Discontinued operations - - - 0.06 Net income $ 0.84 $ 1.07 $ 2.62 $ 2.06 Diluted EPS Amounts attributable to MTI Income from continuing operations $ 29.2 $ 36.8 $ 91.0 $ 69.1 Income from discontinued operations - 0.2 - 2.0 Net income $ 29.2 $ 37.0 $ 91.0 $ 71.1 Weighted average shares outstanding 34.7 34.5 34.7 34.5 Dilutive effect of stock options and stock units 0.3 0.3 0.3 0.3 Weighted average shares outstanding, adjusted 35.0 34.8 35.0 34.8 Earnings per share attributable to MTI Continuing operations $ 0.83 $ 1.06 $ 2.60 $ 1.99 Discontinued operations - - - 0.06 Net income $ 0.83 $ 1.06 $ 2.60 $ 2.05

Restructuring Charges (Tables)

Restructuring Charges (Tables)	9 Months Ended
	Sep. 27, 2015
Restructuring Charges [Abstract]
Reconciliation of restructuring liability	The following table is a reconciliation of our restructuring liability balance as of September 27, 2015: (millions of dollars) Restructuring liability, December 31, 2014 $ 14.6 Additional provisions 6.2 Cash payments (10.9 ) Other adjustments (2.9 ) Restructuring liability, Sept. 27, 2015 $ 7.0
Schedule of restructuring charges	The following table outlines the amount of restructuring charges recorded within the Consolidated Statements of Income. Three Months Ended Nine Months Ended (millions of dollars) Sept. 27, Sept. 28, Sept. 27, Sept. 28, Restructuring Charges $ 5.2 $ 5.8 $ 6.2 $ 11.8 Impairment of Assets 5.3 - 21.1 - Total restructuring and other charges $ 10.5 $ 5.8 $ 27.3 $ 11.8

Inventories (Tables)

Inventories (Tables)	9 Months Ended
	Sep. 27, 2015
Inventories [Abstract]
Inventories by major category	The following is a summary of inventories by major category: Sept. 27, December 31, (millions of dollars) Raw materials $ 79.3 $ 85.9 Work-in-process 5.7 6.7 Finished goods 88.3 88.7 Packaging and supplies 30.3 30.5 Total inventories $ 203.6 $ 211.8

Goodwill and Other Intangible27

Goodwill and Other Intangible Assets (Tables)	9 Months Ended
	Sep. 27, 2015
Goodwill and Other Intangible Assets [Abstract]
Acquired intangible assets subject to amortization	Acquired intangible assets subject to amortization as of September 27, 2015 and December 31, 2014 were as follows: September 27, 2015 December 31, 2014 Weighted Average Useful Life (Years) Gross Accumulated Gross Accumulated (millions of dollars) Tradenames 34 $ 199.8 $ 8.0 $ 191.2 $ 3.7 Technology 12 18.8 2.2 18.7 1.0 Patents and trademarks 17 6.4 4.3 6.4 4.0 Customer relationships 30 4.5 0.5 4.4 0.1 Customer lists 15 2.9 2.8 2.9 2.7 28 $ 232.4 $ 17.8 $ 223.6 $ 11.5

Long-Term Debt and Commitments

Long-Term Debt and Commitments (Tables)	9 Months Ended
	Sep. 27, 2015
Long-Term Debt and Commitments [Abstract]
Summary of long term debt	The following is a summary of long-term debt: Sept. 27, December 31, (millions of dollars) Term Loan Facility, net of unamortized discount of $12.2 million due May 9, 2021 $ 1,315.8 $ 1,454.0 China Loan Facilities 12.0 1.8 Total $ 1,327.8 $ 1,455.8 Less: Current maturities 2.2 0.3 Long-term debt $ 1,325.6 $ 1,455.5

Benefit Plans (Tables)

Benefit Plans (Tables)	9 Months Ended
	Sep. 27, 2015
Benefit Plans [Abstract]
Components of net periodic benefit cost	Components of Net Periodic Benefit Cost Pension Benefits Three Months Ended Nine Months Ended Sept. 27, Sept. 28, Sept. 27, Sept. 28, (millions of dollars Service cost $ 2.8 $ 2.1 $ 8.1 $ 6.5 Interest cost 3.7 4.0 11.6 10.8 Expected return on plan assets (4.9 ) (5.0 ) (14.9 ) (14.2 ) Amortization: Prior service cost 0.1 0.3 0.6 0.9 Recognized net actuarial loss 3.2 1.9 8.9 5.4 Net periodic benefit cost $ 4.9 $ 3.3 $ 14.3 $ 9.4 Other Benefits Three Months Ended Nine Months Ended Sept. 27, Sept. 28, Sept. 27, Sept. 28, (millions of dollars Service cost $ 0.1 $ - $ 0.3 $ 0.3 Interest cost 0.1 0.1 0.3 0.3 Amortization: Prior service cost (0.7 ) (0.8 ) (2.3 ) (2.3 ) Recognized net actuarial (gain)/loss (0.1 ) (0.1 ) (0.1 ) (0.2 ) Net periodic benefit cost $ (0.6 ) $ (0.8 ) $ (1.8 ) $ (1.9 )

Comprehensive Income (Tables)

Comprehensive Income (Tables)	9 Months Ended
	Sep. 27, 2015
Comprehensive Income [Abstract]
Reclassifications out of accumulated other comprehensive income, net of related tax	The following table summarizes the amounts reclassified out of accumulated other comprehensive income (loss) attributable to the Company: Amounts Reclassified Out of Accumulated Other Comprehensive Income (Loss) Three Months Ended Nine Months Ended Sept. 27, Sept. 28, Sept. 27, Sept. 28, (millions of dollars) Amortization of pension items: Pre-tax amount $ 2.5 $ 1.3 $ 7.1 $ 3.8 Tax (0.9 ) (0.5 ) (2.5 ) (1.3 ) Net of tax $ 1.6 $ 0.8 $ 4.6 $ 2.5
Accumulated other comprehensive income, net of related tax, attributable to MTI	The major components of accumulated other comprehensive income, net of related tax, attributable to MTI are as follows: Foreign Currency Translation Adjustment Unrecognized Pension Costs Net Gain on Cash Flow Hedges Total (millions of dollars) Balance as of December 31, 2014 $ (33.4 ) $ (82.1 ) $ 2.6 $ (112.9 ) Other comprehensive income (loss) before reclassifications (65.0 ) - - (65.0 ) Amounts reclassified from AOCI - 4.6 - 4.6 Net current period other comprehensive income(loss) (65.0 ) 4.6 - (60.4 ) Balance as of September 27, 2015 $ (98.4 ) $ (77.5 ) $ 2.6 $ (173.3 )

Accounting for Asset Retireme31

Accounting for Asset Retirement Obligations (Tables)	9 Months Ended
	Sep. 27, 2015
Accounting for Asset Retirement Obligations [Abstract]
Reconciliation of asset retirement obligations	The following is a reconciliation of asset retirement obligations as of September 27, 2015: (millions of dollars) Asset retirement liability, December 31, 2014 $ 23.0 Accretion expense 2.5 Reversals (0.5 ) Payments (1.5 ) Foreign currency translation (1.3 ) Asset retirement liability, September 27, 2015 $ 22.2

Non-controlling interests (Tabl

Non-controlling interests (Tables)	9 Months Ended
	Sep. 27, 2015
Non-controlling interests [Abstract]
Total equity, equity attributable to MTI, and equity attributable to noncontrolling interests	The following is a reconciliation of beginning and ending total equity, equity attributable to MTI, and equity attributable to non-controlling interests: Equity Attributable to MTI Common Additional Retained Accumulated Treasury Non-controlling Total (millions of dollars) Balance as of December 31, 2014 $ 4.8 $ 373.0 $ 1,191.8 $ (112.9 ) $ (593.7 ) $ $ 25.9 $ 888.9 Net income - - 91.0 - - 2.9 93.9 Other comprehensive income (loss) - - - (60.4 ) - (1.1 ) (61.5 ) Dividends declared - - (5.4 ) - - - (5.4 ) Dividends to non-controlling interest - - - - - (0.9 ) (0.9 ) Issuance of shares pursuant to employee stock compensation plans - 1.3 - - - - 1.3 Income tax benefit arising from employee stock compensation plans - 0.8 - - - - 0.8 Stock based compensation - 7.6 - - - - 7.6 Balance as of September 27, 2015 $ 4.8 $ 382.7 $ 1,277.4 $ (173.3 ) $ (593.7 ) $ 26.8 $ 924.7

Segment and Related Informati33

Segment and Related Information (Tables)	9 Months Ended
	Sep. 27, 2015
Segment and Related Information [Abstract]
Segment and related information, net sales and income from operations	Segment information for the three and nine-month periods ended September 27, 2015 and September 28, 2014 were as follows: Three Months Ended Nine Months Ended Sept. 27, Sept. 28, Sept. 27, Sept. 28, (millions of dollars) Net Sales Specialty Minerals $ 156.5 $ 163.0 $ 466.9 $ 490.5 Refractories 77.4 90.4 227.7 266.8 Performance Materials 126.5 135.6 383.5 211.4 Construction Technologies 49.7 69.1 140.7 106.3 Energy Services 40.9 85.4 148.8 134.0 Total $ 451.0 $ 543.5 $ 1,367.6 $ 1,209.0 Income from Operations Specialty Minerals $ 25.0 $ 26.0 $ 75.2 $ 71.4 Refractories 7.9 9.7 24.5 29.0 Performance Materials 22.7 18.7 72.0 23.0 Construction Technologies 6.1 8.3 18.5 9.0 Energy Services (7.9 ) 10.2 (14.2 ) 16.1 Total $ 53.8 $ 72.9 $ 176.0 $ 148.5
Segment and related information, reconciliation of operating income before income taxes	A reconciliation of the totals reported for the operating segments to the applicable line items in the condensed consolidated financial statements is as follows: Income from operations before provision for taxes on income Three Months Ended Nine Months Ended Sept. 27, Sept. 28, Sept. 27, Sept. 28, (millions of dollars) Income from operations for reportable segments $ 53.8 $ 72.9 $ 176.0 $ 148.5 Acquisition Related Transaction and Integration Costs (2.4 ) (4.2 ) (8.5 ) (16.7 ) Unallocated corporate expenses (1.5 ) (1.9 ) (4.9 ) (5.6 ) Consolidated income from operations 49.9 66.8 162.6 126.2 Non-operating deductions, net (11.7 ) (15.1 ) (44.3 ) (30.5 ) Income from continuing operations before provision for taxes on income $ 38.2 $ 51.7 $ 118.3 $ 95.7
Segment and related information, sales by product category	The Company's sales by product category are as follows: Three Months Ended Nine Months Ended Sept. 27, Sept. 28, Sept. 27, Sept. 28, (millions of dollars) Paper PCC $ 106.1 $ 113.4 $ 315.9 $ 341.3 Specialty PCC 15.8 16.5 48.5 50.7 Talc 13.9 13.8 41.9 41.7 Ground Calcium Carbonate 20.7 19.3 60.6 56.8 Refractory Products 60.5 69.7 178.3 201.4 Metallurgical Products 16.9 20.7 49.4 65.4 Metalcasting 63.4 70.0 200.3 109.4 Household, Personal Care and Specialty Products 43.0 42.8 126.6 66.2 Basic Minerals and Other Products 20.1 22.8 56.6 35.8 Environmental Products 21.7 34.5 55.2 51.8 Building Materials and Other Products 28.0 34.6 85.5 54.5 Energy Services 40.9 85.4 148.8 134.0 Total $ 451.0 $ 543.5 $ 1,367.6 $ 1,209.0

Basis of Presentation and Sum34

Basis of Presentation and Summary of Significant Accounting Policies (Details)	9 Months Ended
	Sep. 27, 2015SegmentFacility
Basis of Presentation and Summary of Significant Accounting Policies [Abstract]
Number of reportable segments | Segment	5
Minimum number of mining or production facilities	25

Business Combination (Details)

Business Combination (Details) - USD ($) $ / shares in Units, $ in Millions	May. 09, 2014	Sep. 27, 2015		Sep. 28, 2014	Sep. 27, 2015		Sep. 28, 2014	Dec. 31, 2014
Business Combination, Recognized Identifiable Assets Acquired, Goodwill, and Liabilities Assumed, Net [Abstract]
Goodwill		$ 789.2	[1]		$ 789.2	[1]		$ 770.9	[2]
Acquisition and integration related costs		2.4		$ 4.2	8.5		$ 16.7
Unaudited pro forma summary of Condensed Consolidated Statements of Income [Abstract]
Restructuring and impairment charges		10.5		5.8	27.3		11.8
AMCOL International Corporation [Member]
Business Acquisition [Line Items]
Consideration received (in dollars per share)	$ 45.75
Debt instrument face amount	$ 1,560
Business Combination, Consideration Transferred [Abstract]
Cash consideration transferred to AMCOL shareholders	1,519.4
AMCOL notes repaid at close	325.6
Total consideration transferred to debt and equity holders	1,845
Cash acquired	42.7
Total consideration transferred to debt and equity holders, net of cash acquired	$ 1,802.3
Business Combination, Recognized Identifiable Assets Acquired, Goodwill, and Liabilities Assumed, Net [Abstract]
Deferred tax liability on increase of goodwill		323.8			323.8
Acquisition and integration related costs		2.4		$ 4.2	$ 8.5		16.7
Net sales							451.7
Operating income							48.1
Post acquisition period					143 days
Unaudited pro forma summary of Condensed Consolidated Statements of Income [Abstract]
Net sales					$ 1,367.6		1,582.6
Income from continuing operations before provision for taxes and equity in earnings					118.3		125.9
Income from continuing operations, net of tax					93.9		$ 85.6
Restructuring and impairment charges					27.3
Extinguishment of debt costs					$ 4.5
Tax rate					28.00%
AMCOL International Corporation [Member] | Preliminary Allocation Previously Reported [Member]
Business Combination, Recognized Identifiable Assets Acquired, Goodwill, and Liabilities Assumed, Net [Abstract]
Accounts receivable								235.7
Inventories								157.3
Other current assets								65
Mineral rights								535.5
Plant, property and equipment								371.2
Goodwill								708.1
Intangible assets								214.3
Other non-current assets								51.4
Total assets acquired								2,338.5
Accounts payable								66.4
Accrued expenses								61.6
Non-current deferred tax liability								322.3
Other non-current liabilities								85.9
Total liabilities assumed								536.2
Net assets acquired								$ 1,802.3
AMCOL International Corporation [Member] | Increase/ Decrease [Member]
Business Combination, Recognized Identifiable Assets Acquired, Goodwill, and Liabilities Assumed, Net [Abstract]
Accounts receivable		0			$ 0
Inventories		0			0
Other current assets		0			0
Mineral rights		0			0
Plant, property and equipment		0			0
Goodwill		12.8			12.8
Intangible assets		8.8			8.8
Other non-current assets		9.2			9.2
Total assets acquired		30.8			30.8
Accounts payable		0			0
Accrued expenses		0			0
Non-current deferred tax liability		1.5			1.5
Other non-current liabilities		29.3			29.3
Total liabilities assumed		30.8			30.8
Net assets acquired		0			0
AMCOL International Corporation [Member] | Final Allocation [Member]
Business Combination, Recognized Identifiable Assets Acquired, Goodwill, and Liabilities Assumed, Net [Abstract]
Accounts receivable		235.7			235.7
Inventories		157.3			157.3
Other current assets		65			65
Mineral rights		535.5			535.5
Plant, property and equipment		371.2			371.2
Goodwill		720.9			720.9
Intangible assets		223.1			223.1
Other non-current assets		60.6			60.6
Total assets acquired		2,369.3			2,369.3
Accounts payable		66.4			66.4
Accrued expenses		61.6			61.6
Non-current deferred tax liability		323.8			323.8
Other non-current liabilities		115.2			115.2
Total liabilities assumed		567			567
Net assets acquired		$ 1,802.3			$ 1,802.3
AMCOL International Corporation [Member] | Technology [Member]
Business Combination, Recognized Identifiable Assets Acquired, Goodwill, and Liabilities Assumed, Net [Abstract]
Weighted average amortization period for acquired intangible assets					12 years
AMCOL International Corporation [Member] | Tradenames [Member]
Business Combination, Recognized Identifiable Assets Acquired, Goodwill, and Liabilities Assumed, Net [Abstract]
Weighted average amortization period for acquired intangible assets					34 years
[1]	Unaudited
[2]	Condensed from audited financial statements

Earnings Per Share (EPS) (Detai

Earnings Per Share (EPS) (Details) - USD ($) $ / shares in Units, $ in Millions	3 Months Ended		9 Months Ended
	Sep. 27, 2015	Sep. 28, 2014	Sep. 27, 2015	Sep. 28, 2014
Amounts attributable to MTI [Abstract]
Income from continuing operations	$ 29.2	$ 36.8	$ 91	$ 69.1
Income from discontinued operations	0	0.2	0	2
Net income attributable to Minerals Technologies Inc. (MTI)	$ 29.2	$ 37	$ 91	$ 71.1
Weighted average shares outstanding (in shares)	34,700,000	34,500,000	34,700,000	34,500,000
Earnings per share attributable to MTI [Abstract]
Continuing operations (in dollars per share)	$ 0.84	$ 1.07	$ 2.62	$ 2
Discontinued operations (in dollars per share)	0	0	0	0.06
Basic earnings per share attributable to MTI (in dollars per share)	$ 0.84	$ 1.07	$ 2.62	$ 2.06
Amounts attributable to MTI [Abstract]
Income from continuing operations	$ 29.2	$ 36.8	$ 91	$ 69.1
Income from discontinued operations	0	0.2	0	2
Net income attributable to Minerals Technologies Inc. (MTI)	$ 29.2	$ 37	$ 91	$ 71.1
Weighted average shares outstanding (in shares)	34,700,000	34,500,000	34,700,000	34,500,000
Dilutive effect of stock options and stock units (in shares)	300,000	300,000	300,000	300,000
Weighted average shares outstanding, adjusted (in shares)	35,000,000	34,800,000	35,000,000	34,800,000
Earnings per share attributable to MTI [Abstract]
Continuing operations (in dollars per share)	$ 0.83	$ 1.06	$ 2.60	$ 1.99
Discontinued operations (in dollars per share)	0	0	0	0.06
Diluted earnings per share attributable to MTI (in dollars per share)	$ 0.83	$ 1.06	$ 2.60	$ 2.05
Stock Options [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Anti-dilutive securities not included in the weighted average commons shares outstanding calculation (in shares)	395,545	173,068	395,545	173,068

Restructuring Charges (Details)

Restructuring Charges (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 27, 2015	Sep. 28, 2014	Sep. 27, 2015	Sep. 28, 2014	Dec. 31, 2014
Restructuring Charges [Abstract]
Reduction in workforce					10.00%
Restructuring Reserve [Roll Forward]
Restructuring liability, beginning of period			$ 14.6
Additional provisions			6.2
Cash payments			(10.9)
Other adjustments			(2.9)
Restructuring liability, end of period	$ 7		7
Restructuring Charges	5.2	$ 5.8	6.2	$ 11.8
Impairment of Assets	5.3	0	21.1	0
Total restructuring and other charges	$ 10.5	$ 5.8	$ 27.3	$ 11.8

Discontinued Operations (Detail

Discontinued Operations (Details) $ in Millions	9 Months Ended
	Sep. 28, 2014USD ($)
Discontinued Operations [Abstract]
Reversal of facility closure accrual costs, net of tax	$ 1.8
Tax expense on facility closure accrual costs	$ 0.6

Income Taxes (Details)

Income Taxes (Details) $ in Millions	3 Months Ended	9 Months Ended
	Sep. 27, 2015USD ($)	Sep. 27, 2015USD ($)
Income Taxes [Abstract]
Amount of unrecognized tax benefits	$ 6.2	$ 6.2
Unrecognized tax benefits that would impact effective tax rate	3.7	3.7
Unrecognized tax benefits, net increase in penalties and interest expense	0.1	0.4
Unrecognized tax benefits, accrued interest and penalties	$ 1.7	$ 1.7

Inventories (Details)

Inventories (Details) - USD ($) $ in Millions	Sep. 27, 2015		Dec. 31, 2014
Inventories [Abstract]
Raw materials	$ 79.3		$ 85.9
Work-in-process	5.7		6.7
Finished goods	88.3		88.7
Packaging and supplies	30.3		30.5
Total inventories	$ 203.6	[1]	$ 211.8	[2]
[1]	Unaudited
[2]	Condensed from audited financial statements

Goodwill and Other Intangible41

Goodwill and Other Intangible Assets (Details) - USD ($) $ in Millions	9 Months Ended
	Sep. 27, 2015		Dec. 31, 2014
Goodwill and Other Intangible Assets [Abstract]
Goodwill	$ 789.2	[1]	$ 770.9	[2]
Acquired Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	232.4		223.6
Accumulated Amortization	$ 17.8		11.5
Weighted Average Useful Life	28 years
Finite-Lived Intangible Assets [Line Items]
Increase in intangibles	$ 8.8
Trade Names [Member]
Acquired Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	199.8		191.2
Accumulated Amortization	$ 8		3.7
Weighted Average Useful Life	34 years
Technology [Member]
Acquired Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	$ 18.8		18.7
Accumulated Amortization	$ 2.2		1
Weighted Average Useful Life	12 years
Patents and Trademarks [Member]
Acquired Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	$ 6.4		6.4
Accumulated Amortization	$ 4.3		4
Weighted Average Useful Life	17 years
Customer Relationships [Member]
Acquired Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	$ 4.5		4.4
Accumulated Amortization	$ 0.5		0.1
Weighted Average Useful Life	30 years
Customer Lists [Member]
Acquired Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	$ 2.9		2.9
Accumulated Amortization	$ 2.8		$ 2.7
Weighted Average Useful Life	15 years
Acquired Finite-Lived Intangible Assets [Member]
Finite-Lived Intangible Assets [Line Items]
Weighted average amortization period for acquired intangible assets subject to amortization	28 years
Estimated amortization expense, 2015	$ 8.2
Estimated amortization expense, 2016	8.2
Estimated amortization expense, 2017	8
Estimated amortization expense, 2018	7.8
Estimated amortization expense, 2019	7.8
Estimated amortization expense, 2020	7.8
Estimated amortization expense, thereafter	$ 184.6
[1]	Unaudited
[2]	Condensed from audited financial statements

Long-Term Debt and Commitment42

Long-Term Debt and Commitments (Details) ¥ in Millions, $ in Millions	9 Months Ended			12 Months Ended
	Sep. 27, 2015USD ($)		Sep. 28, 2014USD ($)	Dec. 31, 2014USD ($)Loan		Sep. 27, 2015CNY (¥)	Jun. 23, 2015USD ($)	Dec. 31, 2014CNY (¥)	May. 09, 2014USD ($)
Debt Instrument [Line Items]
Debt	$ 1,327.8			$ 1,455.8
Less: Current maturities	2.2	[1]		0.3	[2]
Long-term debt	1,325.6	[1]		1,455.5	[2]
Maximum borrowing capacity	35.4
Repayments of long-term debt	140.4		$ 113.2
Uncommitted short-term bank credit lines, amount outstanding	$ 6.2
Minimum [Member]
Debt Instrument [Line Items]
Net leverage ratio	3.50
Maximum [Member]
Debt Instrument [Line Items]
Net leverage ratio	5.25
Term Loan Facility, net of unamortized discount of $12.2 million due May 9, 2021 [Member]
Debt Instrument [Line Items]
Debt	$ 1,315.8			1,454
Long-term debt, unamortized discount	$ 12.2			12.2
Maturity date	May 9, 2021
Long-term debt, gross	$ 0								$ 1,560
Maximum borrowing capacity							$ 1,378
Repayments of long-term debt	$ 140.2
Term Loan Facility, net of unamortized discount of $12.2 million due May 9, 2021 [Member] | LIBOR [Member] | Minimum [Member]
Debt Instrument [Line Items]
Facility variable interest rate	0.75%					0.75%
Term Loan Facility, net of unamortized discount of $12.2 million due May 9, 2021 [Member] | LIBOR [Member] | Maximum [Member]
Debt Instrument [Line Items]
Facility variable interest rate	3.00%					3.00%
Term Loan Facility, net of unamortized discount of $12.2 million due May 9, 2021 [Member] | Floating Rate Tranche [Member]
Debt Instrument [Line Items]
Maximum borrowing capacity							1,078
Amortization rate on notes	1.00%
Term Loan Facility, net of unamortized discount of $12.2 million due May 9, 2021 [Member] | Fixed Rate Tranche [Member]
Debt Instrument [Line Items]
Maximum borrowing capacity							$ 300
Facility variable interest rate	4.75%					4.75%
Discount interest rate on notes	0.25%
China Loan Facilities [Member]
Debt Instrument [Line Items]
Debt	$ 12			1.8
Maturity date	Dec. 31, 2019
Long-term debt, gross	$ 13.3
Debt instrument outstanding	$ 12.1
Maximum borrowing capacity				$ 1.8		¥ 27.8		¥ 73.8
Number of committed loan facilities | Loan				3
Revolving Credit Facility [Member]
Debt Instrument [Line Items]
Maturity date	May 9, 2019
Maximum borrowing capacity									$ 200
Basis points related to debt	0.25%
Letters of credit outstanding	$ 9.3
Revolving Credit Facility [Member] | LIBOR [Member]
Debt Instrument [Line Items]
Facility variable interest rate	1.75%					1.75%
Letter of Credit [Member]
Debt Instrument [Line Items]
Letters of credit outstanding	$ 15
[1]	Unaudited
[2]	Condensed from audited financial statements

Benefit Plans (Details)

Benefit Plans (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 27, 2015	Sep. 28, 2014	Sep. 27, 2015	Sep. 28, 2014
Employer Contributions [Abstract]
Maximum percentage of total benefit obligation for international pension plans	25.00%		25.00%
Pension Benefits [Member]
Components of net periodic benefit cost [Abstract]
Service cost	$ 2.8	$ 2.1	$ 8.1	$ 6.5
Interest cost	3.7	4	11.6	10.8
Expected return on plan assets	(4.9)	(5)	(14.9)	(14.2)
Amortization [Abstract]
Prior service cost	0.1	0.3	0.6	0.9
Recognized net actuarial (gain) loss	3.2	1.9	8.9	5.4
Net periodic benefit cost	4.9	3.3	14.3	9.4
Employer Contributions [Abstract]
Expected company contribution to its benefit plans			9
Company contribution to benefit plans			7.2
Other Benefits [Member]
Components of net periodic benefit cost [Abstract]
Service cost	0.1	0	0.3	0.3
Interest cost	0.1	0.1	0.3	0.3
Amortization [Abstract]
Prior service cost	(0.7)	(0.8)	(2.3)	(2.3)
Recognized net actuarial (gain) loss	(0.1)	(0.1)	(0.1)	(0.2)
Net periodic benefit cost	$ (0.6)	$ (0.8)	(1.8)	$ (1.9)
Employer Contributions [Abstract]
Expected company contribution to its benefit plans			1
Company contribution to benefit plans			$ 0.3

Comprehensive Income (Details)

Comprehensive Income (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 27, 2015	Sep. 28, 2014	Sep. 27, 2015	Sep. 28, 2014
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Net of tax			$ (4.6)
Pension Costs [Member]
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Net of tax			(4.6)
Pension Costs [Member] | Reclassification out of Accumulated Other Comprehensive Income [Member]
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Pre-tax amount	$ 2.5	$ 1.3	7.1	$ 3.8
Tax	(0.9)	(0.5)	(2.5)	(1.3)
Net of tax	$ 1.6	$ 0.8	$ 4.6	$ 2.5

Comprehensive Income, Accumulat

Comprehensive Income, Accumulated Other Comprehensive Income, Net of Related Tax (Details) $ in Millions	9 Months Ended
	Sep. 27, 2015USD ($)
Accumulated Other Comprehensive Income (Loss) [Line Items]
Balance at beginning of period	$ (112.9)	[1]
Other comprehensive income (loss) before reclassifications	(65)
Amounts reclassified from AOCI	4.6
Net current period other comprehensive income (loss)	(60.4)
Balance at end of period	(173.3)	[2]
Foreign Currency Translation Adjustment [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Balance at beginning of period	(33.4)
Other comprehensive income (loss) before reclassifications	(65)
Amounts reclassified from AOCI	0
Net current period other comprehensive income (loss)	(65)
Balance at end of period	(98.4)
Unrecognized Pension Costs [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Balance at beginning of period	(82.1)
Other comprehensive income (loss) before reclassifications	0
Amounts reclassified from AOCI	4.6
Net current period other comprehensive income (loss)	4.6
Balance at end of period	(77.5)
Net Gain on Cash Flow Hedges [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Balance at beginning of period	2.6
Other comprehensive income (loss) before reclassifications	0
Amounts reclassified from AOCI	0
Net current period other comprehensive income (loss)	0
Balance at end of period	$ 2.6
[1]	Condensed from audited financial statements
[2]	Unaudited

Accounting for Asset Retireme46

Accounting for Asset Retirement Obligations (Details) $ in Millions	9 Months Ended
	Sep. 27, 2015USD ($)
Accounting for Asset Retirement Obligations [Abstract]
Asset retirement liability, beginning balance	$ 23
Accretion expense	2.5
Reversals	(0.5)
Payments	(1.5)
Foreign currency translation	(1.3)
Asset retirement liability, ending balance	22.2
Asset retirement obligation current portion	1.8
Asset retirement obligation noncurrent portion	$ 20.3

Contingencies (Details)

Contingencies (Details) $ in Millions	3 Months Ended	9 Months Ended
	Sep. 27, 2015USD ($)Cases	Sep. 27, 2015USD ($)ContractLoadCases	Oct. 24, 2014USD ($)	Dec. 31, 2009
Loss Contingencies [Line Items]
Number of contracts entered | Contract		2
Number of ship loads | Load		60
Default arbitration award | $		$ 70
Site Contingency [Line Items]
Consent decree paid by US government | $			$ 2.3
AMCOL International Corporation [Member]
Loss Contingencies [Line Items]
Ownership interest	19.00%	19.00%		20.00%
Administrative Consent Order For Contamination Associated with Historic Use of PCBs [Member]
Site Contingency [Line Items]
Location of plant		Canaan, Connecticut
Estimated accrued remediation cost | $	$ 0.4	$ 0.4
Administrative Consent Order For Installation of Groundwater Contamination System [Member]
Site Contingency [Line Items]
Location of plant		Adams, Massachusetts plant
Estimated accrued remediation cost | $	$ 0.4	$ 0.4
Estimated cost of wastewater treatment upgrades, lower range | $		6
Estimated cost of wastewater treatment upgrades, upper range | $		$ 8
Silica Cases [Member]
Loss Contingencies [Line Items]
Number of pending cases	31	31
Number of cases dismissed to date	43	1,464
Number of new cases filed during the quarter	0
Number of cases settle		1
Asbestos Cases [Member]
Loss Contingencies [Line Items]
Number of pending cases	12	12
Number of cases dismissed to date	2	46
Number of new cases filed during the quarter	1
Number of cases settle		0
Number of allege liability		1

Non-controlling interests (Deta

Non-controlling interests (Details) - USD ($) $ in Millions		3 Months Ended		9 Months Ended
		Sep. 27, 2015	Sep. 28, 2014	Sep. 27, 2015	Sep. 28, 2014
Noncontrolling Interest [Line Items]
Balance	[1]			$ 888.9
Net income		$ 30.3	$ 37.8	93.9	$ 73.5
Other comprehensive income (loss)		(34.2)	$ (26.9)	(61.5)	$ (19.5)
Dividends declared				(5.4)
Dividends to non-controlling interest				(0.9)
Issuance of shares pursuant to employee stock compensation plans				1.3
Income tax benefit arising from employee stock compensation plans				0.8
Stock based compensation				7.6
Balance	[2]	924.7		924.7
Common Stock [Member]
Noncontrolling Interest [Line Items]
Balance				4.8
Net income				0
Other comprehensive income (loss)				0
Dividends declared				0
Dividends to non-controlling interest				0
Issuance of shares pursuant to employee stock compensation plans				0
Income tax benefit arising from employee stock compensation plans				0
Stock based compensation				0
Balance		4.8		4.8
Additional Paid-in Capital [Member]
Noncontrolling Interest [Line Items]
Balance				373
Net income				0
Other comprehensive income (loss)				0
Dividends declared				0
Dividends to non-controlling interest				0
Issuance of shares pursuant to employee stock compensation plans				1.3
Income tax benefit arising from employee stock compensation plans				0.8
Stock based compensation				7.6
Balance		382.7		382.7
Retained Earnings [Member]
Noncontrolling Interest [Line Items]
Balance				1,191.8
Net income				91
Other comprehensive income (loss)				0
Dividends declared				(5.4)
Dividends to non-controlling interest				0
Issuance of shares pursuant to employee stock compensation plans				0
Income tax benefit arising from employee stock compensation plans				0
Stock based compensation				0
Balance		1,277.4		1,277.4
Accumulated Other Comprehensive Income (Loss) [Member]
Noncontrolling Interest [Line Items]
Balance				(112.9)
Net income				0
Other comprehensive income (loss)				(60.4)
Dividends declared				0
Dividends to non-controlling interest				0
Issuance of shares pursuant to employee stock compensation plans				0
Income tax benefit arising from employee stock compensation plans				0
Stock based compensation				0
Balance		(173.3)		(173.3)
Treasury Stock [Member]
Noncontrolling Interest [Line Items]
Balance				(593.7)
Net income				0
Other comprehensive income (loss)				0
Dividends declared				0
Dividends to non-controlling interest				0
Issuance of shares pursuant to employee stock compensation plans				0
Income tax benefit arising from employee stock compensation plans				0
Stock based compensation				0
Balance		(593.7)		(593.7)
Noncontrolling Interests [Member]
Noncontrolling Interest [Line Items]
Balance				25.9
Net income				2.9
Other comprehensive income (loss)				(1.1)
Dividends declared				0
Dividends to non-controlling interest				(0.9)
Issuance of shares pursuant to employee stock compensation plans				0
Income tax benefit arising from employee stock compensation plans				0
Stock based compensation				0
Balance		$ 26.8		$ 26.8
[1]	Condensed from audited financial statements
[2]	Unaudited

Segment and Related Informati49

Segment and Related Information (Details) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 27, 2015USD ($)	Sep. 28, 2014USD ($)	Sep. 27, 2015USD ($)Segment	Sep. 28, 2014USD ($)
Segment Reporting Information [Line Items]
Number of reportable segments | Segment			5
Net Sales	$ 451	$ 543.5	$ 1,367.6	$ 1,209
Income from Operations	49.9	66.8	162.6	126.2
Reportable Segments [Member]
Segment Reporting Information [Line Items]
Income from Operations	53.8	72.9	176	148.5
Specialty Minerals [Member] | Reportable Segments [Member]
Segment Reporting Information [Line Items]
Net Sales	156.5	163	466.9	490.5
Income from Operations	25	26	75.2	71.4
Refractories [Member] | Reportable Segments [Member]
Segment Reporting Information [Line Items]
Net Sales	77.4	90.4	227.7	266.8
Income from Operations	7.9	9.7	24.5	29
Performance Materials [Member] | Reportable Segments [Member]
Segment Reporting Information [Line Items]
Net Sales	126.5	135.6	383.5	211.4
Income from Operations	22.7	18.7	72	23
Construction Technologies [Member] | Reportable Segments [Member]
Segment Reporting Information [Line Items]
Net Sales	49.7	69.1	140.7	106.3
Income from Operations	6.1	8.3	18.5	9
Energy Services [Member] | Reportable Segments [Member]
Segment Reporting Information [Line Items]
Net Sales	40.9	85.4	148.8	134
Income from Operations	$ (7.9)	$ 10.2	$ (14.2)	$ 16.1

Segment and Related Informati50

Segment and Related Information, Reconciliation of Operating Income Before Income Taxes (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 27, 2015	Sep. 28, 2014	Sep. 27, 2015	Sep. 28, 2014
Income from operations before provision for taxes on income [Abstract]
Acquisition Related Transaction and Integration Costs	$ (2.4)	$ (4.2)	$ (8.5)	$ (16.7)
Unallocated corporate expenses	(1.5)	(1.9)	(4.9)	(5.6)
Consolidated income from operations	49.9	66.8	162.6	126.2
Non-operating deductions, net	(11.7)	(15.1)	(44.3)	(30.5)
Income from continuing operations before provision for taxes and equity in earnings	38.2	51.7	118.3	95.7
Reportable Segments [Member]
Income from operations before provision for taxes on income [Abstract]
Consolidated income from operations	$ 53.8	$ 72.9	$ 176	$ 148.5

Segment and Related Informati51

Segment and Related Information, Sales By Product Category (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 27, 2015	Sep. 28, 2014	Sep. 27, 2015	Sep. 28, 2014
Revenue from External Customer [Line Items]
Total net sales	$ 451	$ 543.5	$ 1,367.6	$ 1,209
Paper PCC [Member]
Revenue from External Customer [Line Items]
Total net sales	106.1	113.4	315.9	341.3
Specialty PCC [Member]
Revenue from External Customer [Line Items]
Total net sales	15.8	16.5	48.5	50.7
Talc [Member]
Revenue from External Customer [Line Items]
Total net sales	13.9	13.8	41.9	41.7
Ground Calcium Carbonate [Member]
Revenue from External Customer [Line Items]
Total net sales	20.7	19.3	60.6	56.8
Refractory Products [Member]
Revenue from External Customer [Line Items]
Total net sales	60.5	69.7	178.3	201.4
Metallurgical Products [Member]
Revenue from External Customer [Line Items]
Total net sales	16.9	20.7	49.4	65.4
Metalcasting [Member]
Revenue from External Customer [Line Items]
Total net sales	63.4	70	200.3	109.4
Household, Personal Care and Specialty Products [Member]
Revenue from External Customer [Line Items]
Total net sales	43	42.8	126.6	66.2
Basic Minerals and Other Products [Member]
Revenue from External Customer [Line Items]
Total net sales	20.1	22.8	56.6	35.8
Environmental Products [Member]
Revenue from External Customer [Line Items]
Total net sales	21.7	34.5	55.2	51.8
Building Materials and Other Products [Member]
Revenue from External Customer [Line Items]
Total net sales	28	34.6	85.5	54.5
Energy Services [Member]
Revenue from External Customer [Line Items]
Total net sales	$ 40.9	$ 85.4	$ 148.8	$ 134