10-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM 10-K

x ANNUAL REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934

For the fiscal year ended December 31, 2014 Commission file number 001-12515

OR

¨ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934

OM GROUP, INC.

(Exact name of Registrant as specified in its charter)

Delaware (State or other jurisdiction of incorporation or organization)	52-1736882 (I.R.S. Employer Identification No.)
950 Main Avenue, Suite 1300, Cleveland, Ohio (Address of principal executive offices)	44113-7210 (Zip Code)

216-781-0083

Registrant’s telephone number, including area code

Securities registered pursuant to Section 12(b) of the Act:

Title of each class	Name of each exchange on which registered
Common Stock, par value $0.01 per share	New York Stock Exchange

Securities registered pursuant to Section 12(g) of the Act:

None

Indicate by check mark if the registrant is a well-known seasoned issuer, as defined in Rule 405 of the Securities Act.  

Yes x     No ¨

Indicate by check mark if the registrant is not required to file reports pursuant to Section 13 or Section 15(d) of the Act.  

Yes ¨     No x

Indicate by check mark whether the registrant (1) has filed all reports required to be filed by Section 13 or 15(d) of the Securities Exchange Act of 1934 during the preceding 12 months (or for such shorter period that the registrant was required to file such reports), and (2) has been subject to such filing requirements for the past 90 days.  

Yes x     No ¨

Indicate by check mark whether the registrant has submitted electronically and posted on its corporate Web site, if any, every Interactive Data File required to be submitted and posted pursuant to Rule 405 of Regulation S-T during the preceding 12 months (or for such shorter period that the registrant was required to submit and post such files).  Yes x     No ¨

Indicate by check mark if disclosure of delinquent filers pursuant to Item 405 of Regulation S-K is not contained herein, and will not be contained, to the best of the Registrant’s knowledge, in definitive proxy or information statements incorporated by reference in Part III of this Form 10-K or any amendment to this Form 10-K.  ¨

Indicate by check mark whether the registrant is a large accelerated filer, an accelerated filer, a non-accelerated filer, or a smaller reporting company. See the definitions of “large accelerated filer,” “accelerated filer” and “smaller reporting company” in Rule 12b-2 of the Exchange Act. (Check one):

Large accelerated filer x Accelerated filer o Non-accelerated filer o Smaller reporting company o

(Do not check if a smaller reporting company)

Indicate by check mark whether the registrant is a shell company (as defined in Rule 12b-2 of Act).  Yes ¨    No x

The aggregate market value of Common Stock, par value $.01 per share, held by nonaffiliates (based upon the closing sale price on the NYSE) on June 30, 2014 was approximately $1,010.6 million.

As of February 27, 2015 there were 30,240,512 shares of Common Stock, par value $.01 per share, outstanding.

DOCUMENTS INCORPORATED BY REFERENCE

Portions of the Company’s Proxy Statement for the 2015 Annual Meeting of Stockholders to be held on May 12, 2015 are incorporated by reference into Part III of this Annual Report on Form 10-K.

OM Group, Inc.

TABLE OF CONTENTS

PART I
Item 1.	Business	1
Item 1A.	Risk Factors	4
Item 1B.	Unresolved Staff Comments	8
Item 2.	Properties	8
Item 3.	Legal Proceedings	8
Item 4.	Mine Safety Disclosure	8
PART II
Item 5.	Market for Registrant’s Common Equity, Related Stockholder Matters and Issuer Purchases of Equity Securities	9
Item 6.	Selected Financial Data	10
Item 7.	Management’s Discussion and Analysis of Financial Condition and Results of Operations	11
Item 7A.	Quantitative and Qualitative Disclosures about Market Risk	28
Item 8.	Financial Statements and Supplementary Data	29
Item 9.	Changes in and Disagreements with Accountants on Accounting and Financial Disclosure	36
Item 9A.	Controls and Procedures	36
Item 9B.	Other Information	36
PART III
Item 10.	Directors and Executive Officers of the Registrant and Corporate Governance	36
Item 11.	Executive Compensation	36
Item 12.	Security Ownership of Certain Beneficial Owners and Management and Related Stockholder Matters	36
Item 13.	Certain Relationships and Related Transactions, Director Independence	36
Item 14.	Principal Accountant Fees and Services	36
PART IV
Item 15.	Exhibits and Financial Statement Schedules	37
	Signatures	37

PART I

Item 1.  Business

Overview

OM Group, Inc. (the “Company”, “we”, “our”, “us”) is a technology-driven industrial company serving attractive global markets, including automotive systems, electronic devices, aerospace and defense, industrial and medical. We use innovative technologies to address customers' complex applications and demanding requirements. Our strategy is to grow organically through product and application innovation and new market and customer development, to grow strategically through complementary acquisitions to build-out our growth platforms, and to maximize total stockholder returns through a combination of business growth, financial discipline, optimal deployment of capital and continued operational excellence. Our objective is to deliver sustainable, profitable growth and create long-term stockholder value. The Company is a Delaware Corporation and was formed in 1991.

We operate three strategic business platforms: Magnetic Technologies, Battery Technologies, and Specialty Chemicals. We also have limited continuing involvement in our Advanced Materials business through transition agreements with the buyer of that business as described below. Further discussion of and financial information for these segments, including external sales, operating profit and total assets, is contained in Note 17 to the accompanying consolidated financial statements of this Annual Report on Form 10-K.

On February 18, 2015, we announced a wide-ranging set of competitive repositioning and cost optimization opportunities throughout the enterprise that are expected to improve our ability to serve customers, better compete in global markets and deliver stronger financial performance. The opportunities include headcount reductions across the enterprise; site consolidations; relocation of certain operations to improve our cost structure and better serve customers; better alignment of various research and development, marketing and technical activities with customers’ next generation products and applications; and further corporate cost reductions.

Over the next three years, we expect to incur total cash expenses related to these opportunities of approximately $50 - $65 million. We also anticipate annualized savings of $30 - $40 million by the end of 2017, which are expected to ramp up starting in late 2015. Certain of these opportunities will take place in Europe and are subject to negotiations with employee works councils and unions, which could impact the timing and scope of the expected expenses and savings. We expect that the cost of these opportunities will not have a material impact on our financial position or liquidity and will be funded by operating cash flows and borrowing on our revolving line of credit when necessary.

On November 24, 2014, we completed the acquisition of Ener-Tek International, Inc., which operates under the brand name Yardney Technical Products ("Yardney"), and now operates as a part of our Battery Technologies business. Based in East Greenwich, Rhode Island, Yardney is a designer, developer and manufacturer of high-performance lithium-ion and silver-zinc cells and batteries for niche applications in the defense and aerospace markets. We funded the $24.6 million acquisition price through existing cash balances.

On May 31, 2013, we completed the divestiture of our Ultra Pure Chemicals ("UPC") business for cash proceeds of $63 million. The results of operations of the UPC business are reflected as discontinued operations in the accompanying unaudited condensed consolidated financial statements for all periods presented. A loss, of $9.8 million, net of tax, was recorded on the divestiture. We used the proceeds of the UPC divestiture, along with cash on hand, to repay our then-existing indebtedness.

On March 29, 2013, we completed the divestiture of our cobalt-based Advanced Materials business and the transfer of our 55% equity interests in the Democratic Republic of Congo-based joint venture known as GTL to the joint venture partners. In connection with this transaction, we received net proceeds of $328.7 million, $302.1 million of which was used, together with cash on hand, to repay approximately $346.0 million of our Term B debt. A loss of $111.6 million was recorded on the divestiture. The sale agreement for the downstream portion of the business also provides for potential future additional cash consideration of up to $110.0 million based on the business achieving certain revenue targets over a period of three years. Using our projected trends of cobalt prices and volumes, it is not probable that the business will meet the revenue targets, and no value was assigned to the potential future cash consideration while calculating the loss at the time of the divestiture or at December 31, 2013 and 2014.

The Company consists of the following segments:

Magnetic Technologies segment

The Magnetic Technologies segment develops, manufactures and distributes high-performance, industrial-use magnetic materials and related products with differentiated magnetic and/or other performance properties. A large majority of our products are specially designed and manufactured for specific customers. We offer a wide range of magnetic technology products, from magnetically soft products to some of the most powerful permanent magnets in the world. Our products are sold into a wide array of end markets, including automotive systems, electrical installation technology, industrial, retail and renewable energy. We sell the majority of our products directly to original equipment manufacturers who incorporate them into their sub-assemblies and final assemblies.

In February 2015, the Magnetic Technologies business entered into negotiations with its employee works council in Germany regarding proposed changes to improve competitiveness and performance.  The opportunities are intended to improve the business's ability to serve customers, better compete and grow in global markets and improve financial performance.

At December 31, 2014 and 2013, backlog was $77.1 million and $97.9 million, respectively. The decrease from 2013 to 2014 is partially due to foreign currency. The entire December 2014 backlog is expected to be converted into sales during the next twelve months.

We believe we are a market leader for many of our applications within our primary geographic markets; however, the competitive landscape remains fragmented with many competitors, and no single competitor has significant market share and geographic coverage.

Magnetic Technologies uses a variety of raw material inputs, including dysprosium and neodymium, to produce its products. The supply of these rare earths is currently concentrated in China and has been constrained at times, leading to price volatility. Rare earth prices declined moderately in 2014.

The segment is focused on developing and leveraging its substantial patent portfolio and applications expertise to develop new products, enter new markets and generally increase market share, and on competitive repositioning and cost optimization opportunities.

Battery Technologies segment

The Battery Technologies segment provides advanced batteries, battery management systems, and energetic devices primarily for defense, space and medical markets. We sell these products directly to customers who incorporate them into sub-assemblies. The business is also developing and commercializing products, technologies and applications for emerging markets, including commercial aerospace, alternative energy storage and oil and gas.

At December 31, 2014, backlog was $156.5 million as compared to $135.2 million at December 31, 2013. The increase from 2013 to 2014 is partially due to the Yardney acquisition in November 2014. At December 31, 2014, $19.4 million of the backlog is expected to be converted to sales in periods after 2015.

We believe we are a market leader for defense and space applications in the U.S. due to our innovation, reliability, broad applications and chemistries expertise and long-standing relationships with key customers. There are few competitors qualified to supply into our principal markets. The segment is a prime contractor or subcontractor for numerous U.S. Government programs, including U.S. Government customers, and its top three customers account for approximately half of its sales. Please see "Risk Factors" for important information regarding U.S. government contracts and programs.

The segment is focused on developing new battery chemistries, expanding the markets it serves, developing products and technologies for emerging markets and applications and competitive repositioning and cost optimization opportunities.

Specialty Chemicals segment

The Specialty Chemicals segment develops, produces and supplies chemicals for electronic applications; industrial applications including coatings, composites and tire; and photomasks used by customers to produce semiconductors and related products. The majority of our products are sold directly to customers. Orders are filled quickly, and backlog is not material in this segment.

We participate in fragmented markets and believe we are a market leader for certain of our products for electronic

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device and coatings applications. Our customer base in this segment requires significant technical support and high-quality formulations and products that meet stringent requirements and quality specifications. New products and customers often require a long qualification process.

We are focused on providing innovative products that meet specific customer requirements, expanding our geographical reach and competitive repositioning and cost optimization opportunities.

Advanced Materialssegment

As discussed above, we completed the divestiture of this business in March 2013. Through the date of sale, this business manufactured inorganic products using unrefined cobalt and other metals, for the mobile energy storage, renewable energy, automotive systems, construction and mining, and industrial end markets. It also had a 55% interest in GTL.

Following the sale, to assist in the transition of the downstream business, we entered into two agreements with the buyer pursuant to which: (1) We act as intermediary in a supply agreement between GTL and the buyer, in back-to-back arrangements for a period of at least two years. We met the cobalt feed supply target under that agreement in October 2014 and the supply agreement will terminate in March 2015. (2) We also served as the U.S. distributor for refined cobalt products in primarily back-to-back arrangements until December 31, 2013.

Raw Materials

We use a variety of raw materials purchased from a broad supplier base. The primary raw materials used by Magnetic Technologies are nickel, cobalt and certain rare earth materials, primarily alloys containing dysprosium and neodymium.  Multiple suppliers are generally available for each of these materials; however, some raw materials are sourced from a single supplier. Rare earth materials are critical to the production of certain Magnetic Technologies products and currently are available from a limited number of suppliers, primarily in China. Temporary shortages of raw materials may occasionally occur and cause short-term price increases. Historically, these shortages have not resulted in lack of availability of raw materials. We also use certain raw materials that must be qualified prior to being used in production. For these raw materials, changes in suppliers may result in disruption of production, forward purchasing of contract requirements or re-qualification expenses.

We generally pass through rare earth and certain other raw material prices to our customers in our selling prices. During periods of rapidly changing prices of key raw materials, there may be price lags that can positively or negatively impact our short-term profitability and cash flow from operations. Declines in the selling prices of our finished goods, which can result from decreases in the market price of raw materials and the timing of our pass-through of certain raw materials costs in our selling prices, can result in our inventory carrying value being written down to a lower market value.

Foreign Operations

We have operations in North America, Europe and Asia, with the majority of our operations located outside of the United States. We market our products worldwide and purchase important raw materials from suppliers located outside of the United States. Some of our sales, raw material prices, operating expenses and income taxes are denominated in local currencies. Accordingly, fluctuations in currency prices affect our operating results. The primary currencies for which we have foreign currency rate exposure are the European Union Euro, Taiwanese Dollar, Malaysian Ringgit, Singapore Dollar, British Pound Sterling, and the Chinese Renminbi. Please see "Risk Factors" for additional information regarding our foreign operations and Note 17 to the accompanying consolidated financial statements to this Annual Report on Form 10-K for financial information about geographic areas.

Research and Development

Our research and development programs are part of our strategy to grow the business through new products, applications and markets.  Research and development expenses were approximately $26.0 million in 2014, $26.3 million in 2013 and $32.2 million in 2012.  The decrease from 2012 to 2013 is primarily due to the sale of the cobalt business in 2013. These amounts do not include development and application engineering costs incurred in conjunction with fulfilling customer orders and executing customer projects.

Patents and Other Intellectual Property

We hold patents, registered primarily in Europe and the United States, relating to the formulation, content, manufacturing, processing and use of certain products, materials and chemistries. We also possess other intellectual property, including trademarks, tradenames, know-how, developed technology and trade secrets. Although we believe these intellectual property rights are important in the operations of our specific businesses, we do not consider any

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single patent, trademark, tradename, know-how, developed technology or trade secret to be material to our business as a whole.

Environmental Matters

We are subject to a variety of environmental and pollution control laws and regulations in the jurisdictions in which we operate. As is the case with other companies in similar industries, we face exposure from actual and potential claims and legal proceedings involving environmental matters. A number of factors affect the cost of environmental remediation, including the determination of the extent of contamination, the length of time the remediation may require, the complexity of environmental regulations and the continuing improvements in remediation techniques. Taking these factors into consideration, we estimate the undiscounted costs of remediation, which will be incurred over several years, and accrue an amount consistent with the estimates of these costs when it is probable that a liability has been incurred. We continually evaluate the adequacy of our reserves and adjust the reserves when determined to be appropriate. Ongoing environmental compliance costs, which are expensed as incurred, were approximately $7.9 million in 2014 and $8.0 million in 2013. Ongoing environmental compliance costs include permitting, inspections, pollution control system operations and environmental, health and safety personnel. We anticipate that we will continue to incur compliance costs for the foreseeable future; however, the amount and timing of future environmental expenditures could vary significantly. We believe that our ultimate aggregate cost of environmental remediation as well as liability under environmental protection laws will not materially adversely affect our financial condition or results of operations.

Employees

At December 31, 2014, we had approximately 6,200 full-time employees.

SEC Reports

We make available, free of charge, through our website, (www.omgi.com) our reports on Forms 10-K, 10-Q and 8-K as soon as reasonably practicable after the reports are electronically filed with the Securities and Exchange Commission. A copy of any of these documents is available in print, free of charge, to any stockholder who requests a copy, by writing to OM Group, Inc., 950 Main Avenue, Suite 1300, Cleveland, Ohio 44113-7210, USA, Attention: Investor Relations. The SEC maintains an Internet website at http://www.SEC.gov that contains the Company's annual report and proxy statements and other information. You may read and copy any materials filed with the SEC at the SEC's Public Reference Room at 100 F Street, NE, Washington DC 20549. You may obtain information on the operation of the Public Reference Room by calling the SEC at 1-800-SEC-0330.

Item 1A.  Risk Factors

The following discussion of “risk factors” identifies the most significant risks that our business faces. Our business, financial condition and results of operations could be materially adversely affected by any of these risks. There may be additional risks and uncertainties not presently known to us or that we currently deem to be immaterial. These risks should be read in conjunction with the other information in this Annual Report on Form 10-K.

We are subject to risks arising from uncertainty in worldwide economic conditions.

Overall demand for our products and our profitability may be adversely affected by changes in global economic conditions, including inflationary or deflationary pressures; interest rates; access to and functioning of capital markets; consumer and business spending rates; and higher commodity, raw material and fuel costs. Current uncertainty regarding global economic conditions could lead to reduced demand for our products, reduced profitability, and increased payment delays or defaults. We are limited in our ability to reduce costs to offset the results of a prolonged or severe economic downturn in light of certain fixed costs associated with our operations.

We may not be able to respond effectively to technological changes in our industry or in our customers' products.

Our future business success will depend in part upon our ability to continue to enhance our technological capabilities, develop and market products and applications that meet changing customer needs and successfully anticipate or respond to technological changes on a cost-effective and timely basis. Moreover, technological and other changes in our customers' products or processes may render some of our products obsolete, which would reduce the demand for those products. In addition, technical advances by competitors may lead to production of less expensive or more effective products which could reduce our future sales.

We may not be able to execute upon our competitive repositioning and cost optimization opportunities.

In February 2015, we announced a wide-ranging set of competitive repositioning and cost optimization opportunities throughout the enterprise that are expected to improve our ability to serve customers, compete in global markets and

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deliver stronger financial performance. Achieving the targeted savings from these opportunities within the expected time and cost parameters is dependent upon many factors, including negotiations with employee unions and works councils. The implementation of these opportunities could disrupt our operations. If we cannot implement these opportunities without disrupting our operations, or if the assumptions used to estimate the costs, benefits and timing of these opportunities are incorrect, our business and financial results could be adversely affected and we could achieve different results than those initially projected.

Our Battery Technologies segment maintains contracts with the United States Government and is subject to government regulations, uncertain levels of funding, modifications due to changes in customer priorities and potential termination.

U.S. Government contracts are subject to specific regulations including those related to employment practices, environmental protection, recordkeeping and accounting. These laws impact how we transact business with our governmental clients and, in some instances, impose significant costs on our business operations. If we fail to comply with any of these regulations, requirements or statutes, our existing government contracts could be terminated, and we could be temporarily suspended or even debarred from government contracting or subcontracting which would reduce our sales and profits. Non-compliance with government regulations could also result in financial penalties, disallowed payments to us, and criminal prosecution.

The funding of U.S. Government programs is subject to congressional budget authorization and appropriation processes. We cannot predict the extent to which funding will be provided as part of the budget ultimately approved by Congress. In the event that appropriations for any of our or our customers' programs are impacted, our contract or subcontract under such program may be terminated or adjusted by the U.S. Government. We also cannot predict the impact of potential changes in priorities due to sequestration, military transformation and planning and/or the nature of war-related activity on related programs.

We intend to seek additional acquisitions, but we may not be able to identify attractive targets, complete transactions, or successfully integrate acquired companies, which could adversely affect our strategy.

Our strategy anticipates growth partly through future acquisitions; however, our ability to identify and consummate any future acquisitions on terms that are favorable to us may be limited by the number of attractive acquisition targets, internal demands on our resources and our ability to obtain financing. Our success in integrating newly-acquired businesses could be compromised if we fail to retain key personnel or fail to execute effective integration plans. Integration of acquired operations may take longer, or be more costly or disruptive to our business, than originally anticipated, and it is also possible that expected synergies from future acquisitions may not materialize. We also may incur costs and divert management attention for potential acquisitions that are never consummated. Acquisitions could result in the incurrence of additional debt, costs and contingent liabilities.

There may be liabilities of the acquired companies that we fail to properly determine during the due diligence investigation and for which we, as a successor owner, may be responsible. Indemnities and warranties obtained from the seller may not fully cover the liabilities due to limitations in scope, amount, duration, financial limitations of the indemnitor or warrantor or other reasons.

Failure to retain and recruit key personnel would harm our ability to meet key objectives.

Our key personnel are critical to the management and direction of our businesses. Our future success depends, in large part, on our ability to retain key personnel and other capable management personnel. It is particularly important that we retain our senior management group that is responsible for implementing our strategy. If we were not able to attract and retain talented personnel and replace key personnel should the need arise, we may not successfully execute our strategy.

The majority of our operations are outside the United States, which subjects us to risks that may adversely affect our operating results.

Conducting business outside the U.S subjects us to risks related to the differing legal and regulatory requirements and the social, political and economic conditions of many jurisdictions. These risks include currency rate fluctuations; labor difficulties; difficulty collecting receivables and longer customer payment cycles; unexpected additional taxes, tariffs, restrictions on capital flows, restrictions on trade; and changes in foreign laws or regulatory requirements. Furthermore, unexpected devaluations of currencies in developing or emerging markets could negatively affect the value of our earnings from, and of the assets located in, those markets.

We engage in business in certain countries where the risk of public sector corruption and bribery is high. We have implemented policies and procedures and conducted employee training to assure that our operations are in compliance

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with anti-corruption laws. If our compliance actions fail, a violation of anti-corruption laws could result in serious penalties, including criminal and civil sanctions.

We are at risk from fluctuations in the price and uncertainties in the supply of certain raw materials.

Nickel, cobalt and certain rare earth materials, primarily dysprosium and neodymium, are the primary raw materials used by Magnetic Technologies. Fluctuations in the price of rare earth materials and other raw materials have been significant in the past and we believe price fluctuations are possible in the future. Our ability to pass increases in raw material costs through to our customers by increasing the selling prices of our products is an important factor in our business. We cannot guarantee that we will be able to maintain an appropriate differential between customer prices and our costs at all times, which could lead to reduced profitability. In addition, we may be required under US generally accepted accounting policies ("US GAAP") accounting rules to write down the carrying value of our inventory when rare earth and other raw material prices decrease, which could reduce our profit margins.

Rare earth materials are available from a limited number of suppliers, primarily in China. Political instability and unexpected adverse changes in laws or regulatory requirements, including with respect to export duties, quotas or embargoes, may affect the market price and availability of raw materials, including rare earth materials, particularly from China. If a substantial interruption should occur in the supply of rare earth materials, we may not be able to obtain other sources of supply in a timely fashion or at a reasonable price. A substantial increase in the price or an interruption in supply of rare earth materials may cause our customers to look for substitute materials or processes which could lead to reduced demand for our products.

The level of returns on pension plan assets and changes in the actuarial assumptions used could adversely affect us.

Our operating results may be positively or negatively impacted by the amount of expense we record for our defined benefit pension plans. US GAAP requires that we calculate pension expense using actuarial valuations, which are dependent upon our various assumptions including estimates of expected long-term rate of return on plan assets, discount rates for future payment obligations, and the expected rate of increase in future compensation levels. Our pension expense and funding requirements may also be affected by our actual return on plan assets, and by legislation and other government regulatory actions. Changes in assumptions, laws or regulations could lead to variability in operating results and could have a material adverse impact on liquidity.

The insurance that we maintain may not fully cover all potential exposures.

We maintain property, business interruption and casualty insurance but such insurance may not cover all risks associated with the hazards of our business and is subject to limitations, including deductibles and maximum liabilities covered. We are potentially at risk if one or more of our insurance carriers fail. Additionally, severe disruptions in the domestic and global financial markets could adversely impact the ratings and survival of some insurers. In the future, we may not be able to obtain coverage at current levels, and our premiums may increase significantly on coverage that we maintain.

Changes in effective tax rates or adverse outcomes resulting from examination of our income tax returns could adversely affect us.

We are subject to income taxes in the United States and numerous jurisdictions outside of the United States. Significant judgment is required in evaluating our worldwide provision for income taxes. During the ordinary course of business, there are many transactions for which the ultimate tax determination is uncertain. For example, our effective tax rates could be adversely affected by the mix of earnings in various tax jurisdictions with different tax rates, changes in the valuation of our deferred tax assets and liabilities, the timing and amounts of funds repatriated to the U.S., and changes in tax laws, regulations and accounting principles and interpretations.

We are subject to tax audits in various jurisdictions, and such jurisdictions may assess additional income tax against us. The final determination of tax audits and any related litigation could be materially different from our historical income tax provisions and accruals, resulting in a material reduction of net income.

We are subject to stringent environmental regulation that could cause us to incur unanticipated costs or liabilities and could affect sales of our products.

We have expended, and may be required to expend in the future, substantial funds for compliance with laws and regulations relating to the storage, handling, disposal, emission and discharge of materials into the environment. In addition, we may from time to time be subjected to claims for personal injury, property damages or natural resource damages made by third parties or regulators. Given the many uncertainties involved in assessing liability for environmental claims or fully anticipating the scope of unknown contamination and remediation, our current reserves

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may prove to be insufficient.

In addition, new or revised governmental regulations relating to health, safety and the environment may affect demand for our products. Such new or revised regulations may result in heightened concerns about the materials involved and in additional requirements being placed on the production, handling, or labeling of these materials and may increase the cost of producing them, transporting them and/or limit the use of such materials or products containing such materials, which could lead to a decrease in demand. As a result of these regulations, customers may avoid purchasing some products in favor of perceived environmentally sensitive, less hazardous or less costly alternatives.  

Our financial condition could be negatively impacted if we fail to maintain sufficient cash in the United States.

The majority of our cash and cash equivalents are held outside the United States. If a substantial amount of cash were required in the United States for debt repayment, capital expenditures or other initiatives including future acquisitions, we may be required to repatriate funds to the United States with potentially unfavorable tax consequences or otherwise finance the desired activity. 

We may not be able to adequately protect or enforce our intellectual property rights.

We rely on patents and trade secrets to protect our intellectual property. We attempt to protect and restrict access to our trade secrets and proprietary information, but it may be possible for a third party to obtain our information and develop similar technologies. If a competitor infringes upon our patent or other intellectual property rights, enforcing those rights could be difficult, expensive and time-consuming, making the outcome uncertain. Even if we are successful, litigation to enforce our intellectual property rights or to defend our patents against challenges could be costly and could divert management's attention.

Because we depend on several large customers for a significant portion of our revenues, our operating results could be adversely affected by any disruption of our relationship with these customers or any material adverse change in their businesses.

We depend on several large customers for a significant portion of our business. For example, sales to the top three customers in the Battery Technologies segment represented approximately half of Battery Technologies' net sales in 2013 and 2014. Any disruption in our relationships with our major customers, including any adverse modification of our agreements with them or their unwillingness or inability to perform their obligations under the agreements, could adversely affect us. In addition, any material adverse change in the financial condition of any of our major customers could have similar adverse effects on us.

We operate in very competitive industries.

We have many competitors. Some of our principal competitors have greater financial resources, greater brand recognition, or are operating in lower cost environments. Accordingly, these competitors may be better able to withstand changes in conditions within the industries in which we operate and may have significantly greater operating and financial flexibility. As a result of the competitive environment in the markets in which we operate, we currently face and will continue to face pressure on the sales prices of our products from competitors and large customers. With these pricing pressures, we may experience future reductions in the profit margins on our sales, or may be unable to pass on future raw material price or operating cost increases to our customers, or incur to a sudden loss of business.

We believe that industry consolidation among our peers could result in stronger competitors with greater financial and other resources that are better able to compete for customers.

Future indebtedness may impair our ability to operate our business successfully.

The terms of our Senior Secured Revolving Credit Facility the ("Facility") could adversely affect our ability to finance future operations or capital needs and pursue available business opportunities. This Facility contains various provisions that limit our ability to, among other things, incur additional indebtedness, make investments, or sell assets. These restrictions could place us at a competitive disadvantage against competitors. In addition future borrowings could expose us to material increases in interest expense since future borrowings will have variable interest rate provisions.

In addition, our Facility requires us to maintain specified financial ratios, satisfy certain financial condition tests, and repay our indebtedness when it becomes due. Events beyond our control, including changes in general economic and business conditions, may affect our ability to meet these requirements. We cannot assure that we will meet those requirements or that the lenders will waive any failure to meet those requirements. A breach of any of these covenants or any other restrictive covenants contained in our Facility would result in an event of default. An event of default could result in the holders of the affected indebtedness declaring all amounts outstanding, together with accrued interest, to be immediately due and payable. If we were unable to pay such amounts or secure new financing, the Facility

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lenders could proceed against the collateral pledged to them, which is a substantial portion of our assets.

Any impairment in the value of our intangible assets, including goodwill, would negatively affect our operating results and total capitalization.

Our total assets include substantial intangible assets, including goodwill. The goodwill results from our acquisitions and represents the excess of cost over the fair value of the identifiable net assets we acquired. We assess at least annually whether there has been any impairment in the value of our intangible assets. If future operating performance at one or more of our business units were to fall significantly below current levels, if competing or alternative technologies emerge, if market conditions for acquired businesses decline, if significant and prolonged negative industry or economic trends continue, if our stock price and market capitalization declines, or if future cash flow estimates decline, we could incur under current applicable accounting rules, a non-cash charge to operating earnings for goodwill or intangibles impairment. Any determination requiring the write-off of a significant portion of unamortized intangible assets would negatively affect our results of operations and equity book value, the effect of which could be material.

Extended business interruption at our key facilities could have an adverse impact on operating results.

Our results of operations are dependent in large part upon our ability to produce and deliver products promptly upon receipt of orders. Our facilities in Germany, the United States, and Taiwan are critical to our business, and any damage to or other conditions significantly interfering with the operation of our facilities, such as an interruption of our supply lines or work stoppages, could have a material adverse effect on our business, financial condition and results of operations.

Item 1B.  Unresolved Staff Comments

None.

Item 2.  Properties

We believe that our plants and facilities, which are of varying ages and of different construction types, have been satisfactorily maintained, are suitable for our operations and generally provide sufficient capacity to meet the Company’s production requirements.

The number, type, location and size of our properties as of December 31, 2014, by segment, are set forth below:

	Number and Nature of Facilities			Square Footage (in thousands)
Segment	Manufacturing	Warehouse	Sales/Service	Owned	Leased
Magnetic Technologies	6	6	15	1,966	332
Battery Technologies	8	9	9	408	270
Specialty Chemicals	12	12	14	566	320

	Geographic Locations			Leased Facilities Expiration Dates (years)
Segment	North America	Europe	Asia	Minimum	Maximum
Magnetic Technologies	1	4	10	1	8
Battery Technologies	5	—	—	1	7
Specialty Chemicals	7	5	6	1	27

Item 3.  Legal Proceedings

We are a party to various legal and administrative proceedings incidental to our business. We believe that disposition of all suits and claims related to our ordinary course of business should not in the aggregate have a material adverse effect on our financial position or results of operations.

Item 4.  Mine Safety Disclosures - Not applicable.

Executive Officers of the Registrant

The information under this item is being furnished pursuant to Instruction 3 to Item 401(b) of Regulation S-K and General Instruction G of Form 10-K. Set forth below is the name, age, positions and offices held by each of our executive officers, as well as their business experience during the past five years. Dates indicate when the individual was named to or held the indicated position.

8

Joseph Scaminace - 61

Chairman and Chief Executive Officer (August 2005)

David B. Knowles - 54

President and Chief Operating Officer (April 2013)

Executive Vice President and Chief Operating Officer, Myers Industries, Inc. (June 2009 - March 2013)

Christopher M. Hix - 52

Vice President and Chief Financial Officer (January 2012)

Vice President and Chief Financial Officer, Robbins & Myers, Inc. (August 2006 - December 2011)

Valerie Gentile Sachs - 59

Vice President, General Counsel and Secretary (September 2005)

Gregory J. Griffith - 59

Vice President, Strategic Planning and Development (May 2012)

Vice President, Strategic Planning, Development and Investor Relations (February 2007)

Michael V. Johnson - 63

Vice President, Human Resources (November 2010)

Senior Vice President, Human Resources, FXI Foamex Innovations (January 2008 - October 2010)

PART II

Item 5.  Market for Registrant’s Common Equity, Related Stockholder Matters and Issuer Purchases of Equity Securities

Our common stock is traded on the New York Stock Exchange under the symbol “OMG”. As of December 31, 2014, there were 817 record holders of our common stock. Please see Item 12 in this Form 10-K for information regarding our equity compensation plans.

The high and low market prices of our common stock for each quarter during the past two years are presented in the table below:

	2014				2013
	Sales Price		Cash		Sales Price		Cash
	High	Low	Dividend		High	Low	Dividend
First quarter	$37.58	$30.62	$	0.075	$29.00	$22.28	$	—
Second quarter	$33.79	$28.01	$	0.075	$32.13	$22.22	$	—
Third quarter	$33.56	$24.08	$	0.075	$33.83	$28.36	$	—
Fourth quarter	$30.77	$21.87	$	0.075	$36.49	$31.26	$	—

In 2014 our Board of Directors declared our first quarterly dividend since 2002. A $0.075 dividend was declared each quarter in 2014. On February 10, 2015, our Board of Directors declared a dividend of $0.085 per share payable on March 6, 2015 to the holders of record of all issued and outstanding shares of our Common Stock as of the close of business on February 23, 2015. Future payments of dividends will be based on factors such as our earnings, financial condition, debt covenant restrictions, and other factors as deemed appropriate by the Board. Our credit agreement includes certain covenants which restrict our payment of dividends generally to $15,000,000 per year, so long as no potential default or event of default has occurred and is continuing at the time of declaration.

Comparison of Cumulative Total Stockholder Return(a)

9

(a) The chart above compares our cumulative total stockholder return to that of (1) the Standard & Poor's 500 index and (2) Russell 2000 index. In all cases, the information assumes $100 invested at December 31, 2008, and is presented on a dividends-reinvested basis. The table does not forecast performance of our common stock.

Unregistered Sales of Equity Securities and Use of Proceeds

	Issuer Purchases of Equity Securities
Period	Total Number of Shares Purchased	Average Price Paid per Share			Total Number of Shares Purchased as Part of Publicly Announced Plans or Programs (1)	Maximum Approximate Dollar Value of Shares that May Yet Be Purchased under the Plans or Programs
October 1 - 31, 2014	337,211		$	24.75	—		$	50,742,712
November 1 - 30, 2014	—	—			—	50,742,712
December 1 - 31, 2014	—	—			—	50,742,712
Total October 1 - December 31, 2014	337,211		$	24.75	—		$	50,742,712

(1) On January 21, 2013, we announced that our Board of Directors had authorized a share repurchase plan of up to $50 million of the Company's then outstanding common shares. On August 12, 2014, we announced that our Board of Directors had authorized the repurchase of up to an additional $50 million of the Company's outstanding common shares. There is no expiration date for these authorizations under the repurchase program. All of the shares indicated above were purchased under the share repurchase program. By December 31, 2014, we repurchased 1,874,686 shares under the repurchase program and approximately $51 million of the share repurchase authorizations remained outstanding as of December 31, 2014. Our Senior Secured Revolving Credit Facility (“the Facility”) includes certain covenants regarding restricted payments, including share repurchases, that could limit the Company's ability to repurchase shares.

Item 6.  Selected Financial Data

10

	Year Ended December 31,
	2014			2013			2012			2011		2010
(In millions, except per share data)
Income Statement Data:
Net sales	$	1,067.5		$	1,157.5		$	1,544.4		$	1,419.6	$	1,110.8
Amounts attributable to OM Group, Inc. common stockholders:
Income (loss) from continuing operations before cumulative effect of change in accounting principle, net of tax	$	(172.3	)	$	(71.7	)	$	(38.3	)	$	39.8	$	79.7
Income (loss) from discontinued operations, net of tax	(0.3		)	(12.3		)	(0.4		)	2.2		3.6
Net income (loss)	$	(172.6	)	$	(84.0	)	$	(38.7	)	$	42.0	$	83.3
Net income (loss) per common share attributable to OM Group, Inc. common stockholders — diluted:
Continuing operations	$	(5.54	)	$	(2.27	)	$	(1.21	)	$	1.28	$	2.61
Discontinued operations	(0.01		)	(0.39		)	(0.01		)	0.07		0.12
Net income (loss)	$	(5.55	)	$	(2.66	)	$	(1.22	)	$	1.28	$	2.73
Dividends declared per common share	$	0.30		$	—		$	—		$	—	$	—
Balance Sheet Data:
Cash and cash equivalents	$	91.7		$	118.4		$	227.6		$	292.1	$	400.6
Total assets	$	1,419.5		$	1,783.1		$	2,499.4		$	2,873.8	$	1,772.7
Long-term debt, excluding current portion	—			—			$	454.1		$	633.2	$	90.0

Certain financial data may have been rounded. As a result of such rounding, the totals of data presented in this document may vary slightly from the actual arithmetical totals of such data. The results of our Ultra Pure Chemicals business are reported as discontinued operations in the table above.

Results for 2014 include a $195.4 million goodwill and intangible asset non-cash impairment charge on the Magnetic Technologies goodwill and tradename. Please see additional information regarding this impairment in the Management's Discussion and Analysis of Financial Conditions and Results of Operations and Note 6 to the Consolidated Financial Statements include in Item 8 of this Form 10-K. The results also include costs related to cost optimization and other business improvement initiatives of $1.9 million in Magnetic Technologies, $2.6 million in Battery Technologies, $2.1 million in Specialty Chemicals, and $0.2 million in Corporate, respectively. There was also a $3.2 million non-cash pension settlement charge recorded in Battery Technologies during the fourth quarter.

Results for 2013 include a $111.6 million loss on the divestiture of the Advanced Materials business within continuing operations and a $9.8 million loss on the divestiture of the UPC business within discontinued operations.

Results for 2012 include $55.9 million of charges related to VAC inventory purchase accounting step-up, $2.5 millionnon-cash pension settlement charge,$2.9 milliongain recognized on the sale of property in China, $6.5 million acceleration of deferred financing fees due to debt repayment and $6.0 million income from an acquisition escrow settlement.

Results for 2011 include $111.2 million pre-tax of acquisition-related charges recorded in Magnetic Technologies, $15.4 million of Corporate acquisition-related fees and a $9.7 million gain recognized from a Specialty Chemicals property sale.

Results for 2010 include a $3.2 million Battery Technologies acquisition-related charge and $2.2 million Corporate acquisition-related fees.

Item 7.  Management’s Discussion and Analysis of Financial Condition and Results of Operations

(In millions, except as noted and share and per share amounts)

Management’s discussion and analysis of financial condition and results of operations should be read in conjunction with the consolidated financial statements and the notes thereto appearing elsewhere in this Annual Report.

11

Certain financial data may have been rounded. As a result of such rounding, the totals of data presented in this document may vary slightly from the actual arithmetical totals of such data.

General

OM Group, Inc. (the “Company”, “we”, “our”, “us”) is a technology-driven industrial company serving attractive global markets, including automotive systems, electronic devices, aerospace and defense, industrial and medical. We use innovative technologies to address customers' complex applications and demanding requirements. Our strategy is to grow organically through product and application innovation and new market and customer development, to grow strategically through complementary acquisitions to build-out our growth platforms, and to maximize total stockholder returns through a combination of business growth, financial discipline, optimal deployment of capital and continued operational excellence. Our objective is to deliver sustainable, profitable growth and create long-term stockholder value.

On February 18, 2015, we announced a wide-ranging set of competitive repositioning and cost optimization opportunities throughout the enterprise that are expected to improve our ability to serve customers, better compete in global markets and deliver stronger financial performance. The opportunities include headcount reductions across the enterprise; site consolidations; relocation of certain operations to improve our cost structure and better serve customers; better alignment of various research and development, marketing and technical activities with customers’ next generation products and applications; and further corporate cost reductions.

Over the next three years, we expect to incur total cash expenses related to these opportunities of approximately $50.0 - $65.0 million. We also anticipate annualized savings of $30.0 - $40.0 million by the end of 2017, which are expected to ramp up starting in late 2015. Certain of these opportunities will take place in Europe and are subject to negotiations with employee works councils and unions, which could impact the timing and scope of the expected expenses and savings. We expect that the cost of these opportunities will not have a material impact on our financial position or liquidity and will be funded by operating cash flows and borrowing on our revolving line of credit when necessary.

On November 24, 2014, we completed the acquisition of Ener-Tek International, Inc., which operates under the brand name Yardney Technical Products ("Yardney") and has been included in our Battery Technologies business. Based in Rhode Island, Yardney is a designer, developer and manufacturer of high-performance lithium-ion and silver-zinc cells and batteries for niche applications in the defense and aerospace markets. We funded the $24.6 million acquisition price through existing cash balances.

On May 31, 2013, we completed the divestiture of our Ultra Pure Chemicals (UPC) business for cash proceeds of $63.3 million. The results of operations of the UPC business are reflected as discontinued operations in the accompanying unaudited condensed consolidated financial statements for all periods presented. A loss, net of tax, of $9.8 million was recorded on the divestiture, which included a $1.5 million gain on the sale of net assets offset by the realization of a loss in accumulated other comprehensive income of $8.8 million, a $1.5 million write-off of deferred financing fees related to the required debt pre-payment and transaction expenses of $1.0 million. We used the proceeds of the UPC divestiture, along with cash on hand, to repay our then-existing indebtedness.

On March 29, 2013, we completed the divestiture of our cobalt-based Advanced Materials business and the transfer of our 55% equity interests in the Democratic Republic of Congo-based joint venture known as GTL to the joint venture partners. In connection with this transaction, we received net proceeds of $328.7 million. As required by the Company's Senior Secured Credit agreement in place at the time, $302.1 million of net proceeds received at closing were used, together with cash on hand, to repay approximately $346.0 million of our Term B debt. A loss of $111.6 million was recorded on the divestiture. The sale agreement for the downstream portion of the business also provides for potential future additional cash consideration of up to $110.0 million based on the business achieving certain revenue targets over a period of three years. Using our projected trends of cobalt prices and volumes, it is not probable that the business will meet the revenue targets, and no value was assigned to the potential future cash consideration while calculating the loss on the divestiture or at December 31, 2013 and 2014.

We operate three strategic business platforms: Magnetic Technologies, Battery Technologies, and Specialty Chemicals. Through March 2015, we also have limited continuing involvement in the Advanced Materials business through transition agreements with the buyer as described below. Further discussion of and financial information for these segments,

12

including external sales, operating profit and total assets, is contained in Note 17 to the accompanying consolidated financial statements of this Annual Report on Form 10-K.

Magnetic Technologies

The Magnetic Technologies segment develops, manufactures and distributes differentiated, high-performance industrial-use magnetic materials and related products and systems with exceptional magnetic and/or physical properties for a wide array of end markets, including automotive systems, electrical installation technology, energy conversion and distribution, industrial, retail and renewable energy.

Battery Technologies

The Battery Technologies segment develops, manufactures and distributes specialty batteries, battery management systems, battery-related research and energetic devices for the defense, space, medical, energy storage, commercial aerospace and oil and gas markets.

Specialty Chemicals

The Specialty Chemicals segment develops, produces and supplies chemicals for consumer electronics applications; industrial applications including coatings, composites and catalysts; and photomasks used by customers to produce semiconductors and related products.

Advanced Materials (divested)

As discussed above, on March 29, 2013, we exited this business. During 2012 and through the date of sale, this business manufactured inorganic products using unrefined cobalt and other metals for the mobile energy storage, renewable energy, automotive systems, construction and mining, and industrial markets. It also had a 55% interest in a joint venture (GTL) in the Democratic Republic of Congo (DRC).

Following the sale, to assist in the transition of the downstream business, we entered into two agreements with the buyer pursuant to which: (1) We act as intermediary in a supply agreement between GTL and the buyer, in back-to-back arrangements for a period of two years. We met the cobalt feed supply target under that agreement as of early October 2014 and the supply agreement will terminate in March 2015. (2) We served as the U.S. distributor for refined cobalt products in primarily back-to-back arrangements until December 31, 2013. These agreements will be reported in the Advanced Materials segment until the supply agreement expires or is terminated.

Executive Overview

In 2014, we completed the acquisition of Yardney, returned $44.5 million to stockholders in the form of share repurchases and a regular quarterly cash dividend that we initiated in Q1 2014, and developed and initiated a set of actions to improve growth, margins and returns, including replacing four of our five business unit leaders. We believe these new leaders, in Magnetic Technologies and all three of our Specialty Chemicals businesses, have the abilities and experience to execute our initiatives and accelerate the pace of our competitive repositioning and cost optimization opportunities.

Consolidated net sales decreased by $90.0 million in 2014 compared to 2013, due primarily to the divestiture of the Advanced Materials business ($63.7 million impact) and lower sales at Magnetic Technologies ($27.6 million impact). Excluding the Advanced Materials business, net sales decreased 2.7% in 2014 compared to 2013. Sales in Magnetic Technologies were down 5.3% compared to a year earlier, due primarily to weakening business conditions in Europe and lower rare earth prices, which are generally passed-through to customers in our selling prices. Battery Technologies sales increased by 2.3% due to favorable price/mix and higher volumes in defense and medical applications. Specialty Chemicals sales were essentially flat to a year ago.

During the fourth quarter of 2014, in response to deteriorating European macroeconomic conditions and increasing competition, the Magnetic Technologies management team conducted a strategic evaluation of the business, led by the new business leader who joined in the third quarter of 2014. The evaluation included an assessment of business strengths and challenges and the consideration of various alternatives to improve business performance, including competitive repositioning and cost optimization opportunities.  As a result of this evaluation, including a projection of future business results and consideration of the anticipated costs and benefits from business improvement opportunities, we determined that certain intangible assets of the business were impaired, and recorded goodwill and intangible asset non-cash impairment charges totaling $195.4 million. Throughout 2014, we recorded charges of $10.0 million related to cost reduction and business improvement initiatives across the enterprise, including a non-cash charge of $3.2 million related to a pension settlement in Battery Technologies, severance related to headcount

13

reductions in Specialty Chemicals, severance and other charges related to reducing operations at our medical battery facility in Vancouver in response to the loss of a key customer contract, and charges related to the business leadership changes discussed above.

Excluding the impact of the special charges noted above and the results of Advanced Materials in both years, adjusted operating profit and EBITDA were $45.9 million and $113.4 million, respectively, in 2014 compared to $51.2 million and $121.0 million, respectively, in 2013. A reconciliation of these adjusted numbers to US GAAP is contained on pages 17 and 18. The decrease in earnings in 2014 resulted from lower sales volumes and higher operating expenses in Magnetic Technologies, and $3.7 million of insurance proceeds in Specialty Chemicals in 2013 that did not repeat in 2014. These factors were partially offset by higher profitability in 2014 in Battery Technologies due to favorable price/mix and higher sales volumes, as well as lower Corporate expenses.

Consolidated Operating Results for 2014, 2013 and 2012

Set forth below is a summary of the Statements of Consolidated Operations for the years ended December 31,

	2014					2013					2012
(percent of net sales)
Net sales	$	1,067.5				$	1,157.5				$	1,544.4
Cost of goods sold	829.3					899.1					1,300.8
Gross profit	238.2			22.3	%	258.4			22.3	%	243.6			15.8	%
Selling, general and administrative expenses	207.9			19.5	%	217.3			18.8	%	251.2			16.3	%
Goodwill and intangible asset impairment	195.4					—					—
Gain on sale of property	—					—					(2.9		)
Operating profit (loss)	(165.1		)	(15.5	)%	41.1			3.6	%	(4.7		)	(0.3	)%
Other expense, net	(7.7		)			(103.9		)			(43.9		)
Income tax expense (benefit)	(0.5		)			10.7					(3.2		)
Loss from continuing operations, net of tax	(172.3		)			(73.5		)			(45.4		)
Loss from discontinued operations, net of tax	(0.3		)			(12.3		)			(0.4		)
Consolidated net loss	(172.6		)			(85.8		)			(45.8		)
Net loss attributable to noncontrolling interests	—					1.8					7.1
Loss attributable to OM Group, Inc. common stockholders	$	(172.6	)			$	(84.0	)			$	(38.7	)
Earnings per common share — basic:
Loss from continuing operations attributable to OM Group, Inc.common stockholders	$	(5.54	)			$	(2.27	)			$	(1.21	)
Loss from discontinued operations attributable to OM Group, Inc. common stockholders	(0.01		)			(0.39		)			(0.01		)
Net loss attributable to OM Group, Inc. common stockholders	$	(5.55	)			$	(2.66	)			$	(1.22	)
Earnings per common share — assuming dilution:
Loss from continuing operations attributable to OM Group, Inc. common stockholders	$	(5.54	)			$	(2.27	)			$	(1.21	)
Loss from discontinued operations attributable to OM Group, Inc. common stockholders	(0.01		)			(0.39		)			(0.01		)
Net loss attributable to OM Group, Inc. common stockholders	$	(5.55	)			$	(2.66	)			$	(1.22	)
Weighted average shares outstanding
Basic	31.1					31.6					31.9
Assuming dilution	31.1					31.6					31.9
Amounts attributable to OM Group, Inc. common stockholders:
Loss from continuing operations, net of tax	$	(172.3	)			$	(71.7	)			$	(38.3	)
Loss from discontinued operations, net of tax	(0.3		)			(12.3		)			(0.4		)
Net loss	$	(172.6	)			$	(84.0	)			$	(38.7	)

14

In this report we provide adjusted operating profit (loss), adjusted EBITDA, and adjusted earnings per common share attributable to OM Group, Inc. common stockholders - assuming dilution, which are non-GAAP financial measures. The tables below present reconciliations of these amounts to the comparable US GAAP amounts. We believe that the non-GAAP financial measures presented in the tables facilitate a comparative assessment of the Company's operating performance and enhance investors' understanding of the performance of the Company's operations. The non-GAAP financial information set forth in the tables below are not alternatives to reported results determined in accordance with US GAAP.

	2014
	Magnetic Technologies				Battery Technologies		Specialty Chemicals			Corporate			Subtotal			Advanced Materials			Consolidated
Operating profit (loss) - as reported	$	(177.1	)		$	19.9	$	31.3		$	(33.6	)	$	(159.5	)	$	(5.6	)	$	(165.1	)
Goodwill and intangible asset impairment	195.4				—		—			—			195.4			—			195.4
Charges related to initiatives	1.9				2.6		2.1			0.2			6.8			—			6.8
Pension settlement expense	—				3.2		—			—			3.2			—			3.2
Adjusted operating profit	$	20.2			$	25.7	$	33.4		$	(33.4	)	$	45.9		$	(5.6	)	$	40.3
Depreciation and amortization	42.2				10.5		14.0			0.8			67.5			—			67.5
Adjusted EBITDA	$	62.4			$	36.2	$	47.4		$	(32.6	)	$	113.4		$	(5.6	)	$	107.8
	2013
	Magnetic Technologies				Battery Technologies		Specialty Chemicals			Corporate			Subtotal			Advanced Materials			Consolidated
Operating profit (loss) - as reported	$	22.4			$	21.8	$	35.8		$	(38.5	)	$	41.5		$	(0.4	)	$	41.1
Charges related to initiatives	5.4			—	0.8		1.1			2.4			9.7			—			9.7
Adjusted operating profit	$	27.8			$	22.6	$	36.9		$	(36.1	)	$	51.2		$	(0.4	)	$	50.8
Depreciation and amortization (a)	44.2				10.1		14.8			0.7			69.8			3.9			73.7
Adjusted EBITDA	$	72.0			$	32.7	$	51.7		$	(35.4	)	$	121.0		$	3.5		$	124.5
	2012
	Magnetic Technologies				Battery Technologies		Specialty Chemicals			Corporate			Subtotal			Advanced Materials			Consolidated
Operating profit (loss) - as reported	$	(22.3	)		$	19.6	$	34.5		$	(42.9	)	$	(11.1	)	$	6.4		$	(4.7	)
Total VAC inventory purchase accounting step-up and LCM charges	55.9				—		—			—			55.9			—			55.9
Pension settlement expense	—				—		—			2.5			2.5			—			2.5
Gain on sale of property	—				—		(2.9		)	—			(2.9		)	—			(2.9		)
Adjusted operating profit	$	33.6			$	19.6	$	31.6		$	(40.4	)	$	44.4		$	6.4		$	50.8
Depreciation and amortization	40.8				10.1		15.7			0.8			$	67.4		16.9			84.3
Adjusted EBITDA	$	74.4			$	29.7	$	47.3		$	(39.6	)	$	111.8		$	23.3		$	135.1

(a) $0.2 million of accelerated software amortization is included in Corporate charges related to cost-reduction initiatives and excluded from Corporate depreciation and amortization in the table above for the twelve months ended December 31, 2013.

15

	Year Ended
	December 31,
	2014						2013						2012
(in millions, except per share data)	$			Diluted EPS			$			Diluted EPS			$			Diluted EPS
Net income (loss) from continuing operations attributable to OM Group Inc. - as reported	$	(172.3	)	$	(5.50	)	$	(71.7	)	$	(2.25	)	$	(38.3	)	$	(1.20	)
Less:
(Gain) loss on divestiture of Advanced Materials business	(1.7		)	(0.05		)	111.6			3.51			—			—
Goodwill and intangible asset impairment	195.4			6.24			—			—
Charges related to initiatives	6.8			0.22			9.7			0.30			—			—
VAC inventory purchase accounting step-up and lower of cost or market charges	—			—			—			—			55.9			1.75
Pension settlement expense	3.2			0.10			—			—			2.5			0.08
Gain on sale of property	—			—			—			—			(2.9		)	(0.09		)
Acceleration of deferred financing fees	—			—			1.0			0.03			6.5			0.20
EPT escrow settlement, net of tax	—			—			—			—			(6.0		)	(0.19		)
Contingent consideration adjustment	—			—			(13.0		)	(0.41		)	—			—
Tax effect of special items	(9.0		)	(0.30		)	(1.2		)	(0.04		)	(17.3		)	(0.54		)
Adjusted net income from continuing operations attributable to OM Group, Inc.	$	22.4		$	0.71		$	36.4		$	1.14		$	0.4		$	0.01
Weighted average shares outstanding - diluted (a)				31.3						31.8						32.0

(a) Because the reported loss from continuing operations is income on a adjusted basis, we used diluted shares to calculate EPS

The 2014 items in the above table are described more fully in the Executive Overview above.

The 2013 charges related to enterprise-wide cost-reduction initiatives, including headcount reductions, minor facility consolidations, supply chain optimization, corporate cost reductions, and other structural changes to improve profitability. These actions increased pre-tax profit by $17.3 million in 2013. In 2013, we incurred charges of $9.7 million associated with these actions.

Magnetic Technologies acquisition-related charges in 2012 totaled $55.9 million (net of related tax benefit), representing the step-up value for inventory in purchase accounting that turned through cost of goods sold after the business was acquired. Other items impacting operating profit included a land sale gain of $2.9 million (net of tax) in Specialty Chemicals, and expense of $2.5 million (net of tax) related to a settlement charge associated with lump-sum cash settlements to certain participants in one of our U.S. defined benefit pension plans. Other income (expense) included a $6.0 million (net of tax) benefit for a fourth quarter 2012 receipt of cash from an escrow account related to the 2010 Battery Technologies acquisition, and it included Interest expense of $1.0 million (net of tax) in the second half of 2012 related to accelerated amortization of deferred financing fees as a result of early repayments of debt.

2014 Compared with 2013

The following table identifies, by segment, the components of change in net sales and operating profit in 2014 compared with 2013:

	Net sales			Operating profit - as reported			Adjusted operating profit
2013	$	1,157.5		$	41.1		$	50.8
Increase (decrease) in 2013 from:
Magnetic Technologies	(27.6		)	(199.5		)	(7.6		)
Battery Technologies	3.5			(1.9		)	3.1
Specialty Chemicals	(2.5		)	(4.5		)	(3.5		)
Advanced Materials	(63.7		)	(5.2		)	(5.2		)
Corporate	—			4.9			2.7
Intersegment items	0.3			—			—
2014	$	1,067.5		$	(165.1	)	$	40.3

Excluding the impact of the divested Advanced Materials business ($63.7 million), net sales in 2014 were $26.3 million, or 2.7%, lower than 2013. This decrease is due primarily to lower net sales in our Magnetic Technologies business

16

and resulted from lower rare earth prices in 2014, which are generally passed-through to our customers in our selling prices, as well as weakening business conditions in Europe and increased competition and lower prices. This decrease was partially offset by a sales increase of $3.4 million, or 2.3%, in our Battery Technologies business, which was driven by favorable price/mix and higher volumes in defense and medical applications. Net sales in Specialty Chemicals were roughly flat in 2014 compared to 2013.

Gross profit decreased to $238.2 million in 2014, compared with $258.4 million in 2013. The largest factors affecting the $20.2 million decrease were the sale of Advanced Materials ($12 million impact), and lower sales and rare-earth price impacts in Magnetic Technologies.

Selling, general and administrative expenses (“SG&A”) decreased to $207.9 million in 2014 compared with $217.3 million in 2013 due primarily to the Advanced Materials divestiture ($6 million impact). Excluding the Advanced Materials business, SG&A as a percentage of net sales was 21% in both 2014 and 2013.

The intangible impairment charge of $195.4 million in 2014 relates to goodwill and intangible assets in Magnetic Technologies and is described more fully in the Executive Overview above.

The following table summarizes the components of Other expense, net:

	Year Ended December 31,
	2014			2013			Change
Interest expense	$	(2.6	)	$	(12.3	)	$	9.7
Accelerated amortization of deferred financing fees	—			(6.5		)	6.5
Foreign exchange gain (loss)	(6.5		)	8.0			(14.5		)
Gain (loss) on divestiture of Advanced Materials	1.7			(111.6		)	113.3
Other income (expense), net	(0.3		)	12.0			(12.3		)
	$	(7.7	)	$	(110.4	)	$	102.7

The decrease in interest expense is due to lower debt outstanding in 2014 compared to 2013, as we repaid our debt in the first half of 2013. The 2013 accelerated amortization of deferred financing fees is related to the debt paydown.

The foreign exchange loss in 2014 is primarily related to movements in Euro/U.S. dollar exchange rates and the resulting impact on the revaluation of non-functional currency cash and debt balances. During 2014, the Euro weakened against the dollar from 1.38 at December 31, 2013 to 1.21 at December 31, 2014, resulting in a foreign exchange loss. During 2013, the opposite occurred when the Euro strengthened from 1.32 at December 31, 2012 to 1.38 at December 31, 2013, resulting in a foreign exchange gain.

Other income in 2013 is primarily comprised of a $13 million reduction of the contingent consideration liability associated with our 2011 acquisition of Rahu Catalytics Limited ("Rahu") in 2011.

We recorded an income tax benefit of $0.5 million on a pre-tax loss of $172.8 million in 2014. The effective income tax rate for the year ended December 31, 2014 is impacted by the Magnetic Technologies impairment charges of $195.4 million and other special charges totaling $10.0 million described more fully above. There is no tax benefit for the $168.7 million goodwill portion of the impairment charges due to its permanent nature. Excluding the impairment charge, the other special items and the Advanced Materials results, our effective income tax rate was 22.7%. This rate is lower than the U.S. statutory tax rate primarily due to income earned in tax jurisdictions with lower statutory rates than the U.S. and our financing structure, partially offset by losses and carry-forwards in certain jurisdictions (including the U.S. and Germany) with no corresponding tax benefit.

We recorded an income tax expense of $10.7 million on pre-tax loss of $62.8 million for 2013. The effective tax rate was impacted by the loss on the divestiture of Advanced Materials, which had no income tax benefit, and other special items. Excluding these special items, our effective income tax rate would have been 25.6%. This rate is lower than the U.S. statutory tax rate primarily due to income earned in tax jurisdictions with lower statutory rates than the U.S., and our financing structure, partially offset by losses and carry-forwards in certain jurisdictions (including the U.S. and Germany) with no corresponding tax benefit.

2013 Compared with 2012

The following table identifies, by segment, the components of change in net sales in 2013 compared with 2012:

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	Net sales			Operating profit (loss) - as reported			Adjusted operating profit
2012	$	1,544.4		$	(4.7	)	$	50.8
Increase (decrease) in 2012 from:
Magnetic Technologies	(109.0		)	44.7			(5.8		)
Battery Technologies	7.3			2.3			3.0
Specialty Chemicals	(5.0		)	1.3			5.3
Advanced Materials	(280.8		)	(6.9		)	4.3
Corporate	—			4.4			(6.8		)
Intersegment items	0.5			—			—
2013	$	1,157.5		$	41.1		$	50.8

Net sales decreased $387.0 million, or 25.1%, due primarily to the divestiture of the Advanced Materials business ($280.8 million impact) and lower rare earth prices ($113.3 million impact) in our Magnetic Technologies business, which are generally passed-through to customers in the business' selling prices. Excluding these two items, net sales increased 0.8% in 2013 compared to 2012, including $16.0 million of translation benefit from a stronger Euro. Battery Technologies sales grew 5.1% due to higher sales into both defense and medical markets. Excluding the rare earth price impact and the translation benefit, sales in Magnetic Technologies were slightly lower than a year ago, due to macroeconomic weakness in Europe. Specialty Chemicals sales were down 1.6%, as weaker conditions impacting our Advanced Organics and Photomasks product lines more than offset higher demand for our memory disk product line.

Gross profit increased to $258.4 million in 2013, compared with $243.6 million in 2012. The largest factors affecting the $14.9 million increase in gross profit were higher sales volumes in Battery Technologies and savings from cost reductions actions net of related charges. Gross profit in 2012 was negatively impacted by VAC purchase accounting step-up charges that did not repeat in 2013. Gross profit in 2012 benefited from the full year of Advanced Materials gross profit.

Selling, general and administrative expenses (“SG&A”) decreased to $217.3 million in 2013 compared with $251.2 million in 2012 due primarily to the Advanced Materials divestiture.

	Year Ended December 31,
	2013			2012			Change
Interest expense	$	(12.3	)	$	(49.7	)	$	37.4
Foreign exchange gain (loss)	8.0			(0.8		)	8.8
Loss on divestiture of Advanced Materials	(111.6		)	—			(111.6		)
Other expense, net	12.0			6.6			5.4
	$	(103.9	)	(43.9		)	$	(60.0	)

The decrease in interest expense is due to lower debt outstanding in 2013 compared to 2012, as we repaid our then-existing debt in the first half of 2013. The foreign exchange gain in 2013 is primarily related to movements in Euro/U.S. dollar exchange rates and the resulting impact on the revaluation of non-functional currency cash and debt balances.

Other income in 2013 is primarily comprised of a $13 million reduction of the contingent consideration liability associated with the 2011 acquisition of Rahu. Other income in 2012 relates primarily to a receipt of $6 million from an escrow settlement related to the 2010 Battery Technologies acquisition.

We recorded income tax expense of $10.7 million on pre-tax loss of $62.8 million for 2013. The effective tax rate was impacted by the loss on the divestiture of Advanced Materials, which had no income tax benefit, and other special items. Excluding these special items, our effective income tax rate would have been 25.6%. This rate is lower than the U.S. statutory tax rate primarily due to income earned in tax jurisdictions with lower statutory rates than the U.S., and our financing structure, partially offset by losses and carry-forwards in certain jurisdictions (including the U.S. and Germany) with no corresponding tax benefit.

We recorded an income tax benefit of $3.2 million on pre-tax loss of $48.6 million for 2012. The effective tax rate was impacted by VAC purchase accounting related inventory charges of $55.9 million, a tax expense of $10.4 million related

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to GTL which included a $5.6 million increase in the valuation allowance for prepaid tax asset and $6.6 million for other GTL permanent differences.

Excluding the impact of VAC purchase accounting-related inventory charges and GTL discrete and permanent items, the effective tax rate for the year ended December 31, 2012 would have been 31.8%. This rate is lower than the U.S. statutory tax rate primarily due to income earned in tax jurisdictions with lower statutory rates than the U.S., and our financing structure, partially offset by losses and carry-forwards in certain jurisdictions (including the U.S. and Germany) with no corresponding tax benefit.

Segment Results and Corporate Expenses

Magnetic Technologies

In 2014 this segment focused on (1) replacing its leadership, (2) developing new products and applications, including leveraging its substantial patent portfolio, know-how and expertise to enter new markets and increase market share and (3) conducting a strategic evaluation of the business to identify opportunities to improve operating performance.

The primary raw materials used by Magnetic Technologies are nickel, cobalt and certain rare earth materials, primarily dysprosium and neodymium. Rare earth materials are currently available from a limited number of suppliers, primarily in China. We generally pass through rare earth prices to our customers in our selling prices, typically with a lag period. Rare earth prices declined moderately throughout 2014, which negatively impacted net sales and profitability.

For the year ended December 31,	2014			2013		2012
Net sales	$	495.0		$	522.6	$	631.6
Operating income (loss)	$	(177.1	)	$	22.4	$	(22.3	)
Goodwill and intangible asset impairment	195.4			—		—
Charges related to initiatives	1.9			5.4		—
VAC inventory purchase accounting step-up and LCM charges	—			—		55.9
Adjusted operating profit	$	20.2		$	27.8	$	33.6

The intangible impairment of $195.4 million is related to the write-down of goodwill and other intangible assets to fair value in the fourth quarter of 2014. Charges of $1.9 million related to initiatives in 2014 related to cost optimization and other business improvement initiatives. Charges related to cost-reduction initiatives of $5.4 million in 2013 relate to the cost reduction program that year. Acquisition-related charges in 2012 include $55.9 million of charges as a result of purchase accounting for acquired inventory. As of December 31, 2012, all of the inventory step-up related to the 2011 acquisition had been charged to cost of goods sold.

2014 Compared with 2013

The following table identifies the components of change in net sales and operating profit:

	Net sales			Operating profit			Adjusted operating profit
2013	$	522.6		$	22.4		$	27.8
Increase (decrease) in 2014 from:
Volume/mix	(6.1		)	(1.0		)	(1.0		)
Selling price	(3.7		)	(3.7		)	(3.7		)
Rare earth pricing effects	(14.0		)	(3.3		)	(3.3		)
Other commodity input pricing	(4.7		)	(1.1		)	(1.1		)
Goodwill and intangible asset impairment	—			(195.4		)	—
Charges related to cost-reduction initiatives	—			3.5			—
Foreign currency translation effect	1.1			(0.1		)	(0.1		)
Other	(0.2		)	1.6			1.6
2014	$	495.0		$	(177.1	)	$	20.2

Net sales decreased $27.6 million, primarily due to lower rare earth prices in 2014 compared to 2013. Typically we pass through these raw material price changes to our customers in our selling prices, with a lag between the inventory

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purchase and the subsequent price adjustment with our customers. Volume declines and pricing pressures in 2014 also contributed to the sales decline and are attributed to weaker business conditions and increasing competition. These same factors negatively impacted operating profit in 2014 compared to 2013.

2013 Compared with 2012

The following table identifies the components of change in net sales and operating profit:

	Net sales			Operating profit			Adjusted operating profit
2012	$	631.6		$	(22.3	)	$	33.6
Increase (decrease) in 2012 from:
Purchase accounting charges in 2012	—			55.9			—
Volume/mix	(6.9		)	0.1			0.1
Selling price	(4.9		)	(4.9		)	(4.9		)
Rare earth pricing effects	(113.3		)	(22.4		)	(22.4		)
Operating expenses, including savings from cost-reduction initiatives	—			12.7			12.7
Charges related to cost-reduction initiatives	—			(5.4		)	—
Foreign currency translation effect	16.1			0.4			0.4
Other	—			8.3			8.3
2013	$	522.6		$	22.4		$	27.8

Net sales decreased $109.0 million, primarily due to lower rare earth prices in 2013 compared to 2012. Typically we pass through these raw material price changes to our customers in our selling prices, with a lag between the inventory purchase and the subsequent price adjustment with our customers. Volume declines are attributed to weaker macroeconomic conditions in certain markets, primarily in Europe.

Battery Technologies

In 2014 this segment was focused on (1) executing and beginning to integrate the complementary Yardney acquisition, (2) developing new specialty battery chemistries, products and applications, (3) expanding its served markets into new or emerging markets, including grid energy storage, commercial aerospace and oil and gas, and (4) reducing medical battery production costs in response to the loss of a key customer contract.

For the year ended December 31,

	2014		2013		2012
Net sales	$	153.8	$	150.3	$	143.0
Operating profit	$	19.9	$	21.8	$	19.6
Charges related to initiatives	2.6		0.8		—
Pension settlement expense	3.2		—		—
Adjusted operating profit	$	25.7	$	22.6	$	19.6

The Battery Technologies segment tracks backlog, which is equal to the value of unfulfilled orders for which funding is contractually obligated by the customer and for which revenue has not been recognized. At December 31, 2014, backlog was $156.5 million as compared with $135.2 million at December 31, 2013, with the majority of the increase related to the Yardney acquisition in November 2014. Approximately $19.4 million of the backlog at December 31, 2014 is expected to be converted to sales in periods after 2015.

2014 Compared with 2013

The following table identifies the components of change in net sales and operating profit:

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	Sales			Operating profit			Adjusted operating profit
2013	$	150.3		$	21.8		$	22.6
Increase (decrease) in 2013 from:
Sales volume	4.0			1.6			1.6
Price/mix	(0.5		)	1.6			1.6
Charges related to initiatives	—			(1.8		)	—
Pension settlement expense	—			(3.2		)	—
Other	—			(0.1		)	(0.1		)
2014	$	153.8		$	19.9		$	25.7

Battery Technologies net sales and adjusted operating profit increased in 2014 due primarily to favorable sales volume and mix. Operating profit in 2014 was negatively impacted by the special charges and pension settlement expense described earlier.

2013 Compared with 2012

The following table identifies the components of change in net sales and operating profit:

	Sales		Operating profit			Adjusted operating profit
2012	$	143.0	$	19.6		$	19.6
Increase (decrease) in 2012 from:
Sales volume	7.1		2.1			2.1
Price/mix	0.1		1.9			1.9
Charges related to cost-reduction initiatives	—		(0.8		)	—
Other	0.1		(1.0		)	(1.0		)
2013	$	150.3	$	21.8		$	22.6

Battery Technologies net sales increased in 2013 due to increased sales volumes, driven primarily by increased sales into defense, where the business benefited from customer spending on programs showing continued growth, and medical markets, benefiting from new customer device qualifications. Operating profit benefited from the higher volumes, as well as favorable mix.

Specialty Chemicals

In 2014 this segment was focused on (1) replacing its leadership team, (2) utilizing its technology to provide solutions for electronic devices with increasing demanding performance specifications and miniaturization, (3) taking steps to optimize its cost structure, and (4) streamlining its product portfolio.

For the year ended December 31,

	2014		2013		2012
Net sales	$	316.1	$	318.6	$	323.6
Operating profit (loss)	$	31.3	$	35.8	$	34.5
Charges related to cost-reduction initiatives	2.1		1.1		—
Gain on sale of property	—		—		(2.9		)
Adjusted operating profit	$	33.4	$	36.9	$	31.6

2014 Compared with 2013

The following table identifies the components of change in net sales and operating profit:

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	Sales			Operating profit			Adjusted operating profit
2013	$	318.6		$	35.8		$	36.9
Increase (decrease) in 2014 from:
Volume	(10.9		)	(6.4		)	(6.4		)
Selling price/mix	8.5			3.3			3.3
Foreign currency	0.7			—			—
Insurance proceeds in 2013	—			(3.7		)	(3.7		)
Charges related to cost-reduction initiatives	—			(1.1		)	—
Other	(0.8		)	3.4			3.4
2014	$	316.1		$	31.3		$	33.4

Sales were relatively flat compared with the previous year, as lower sales volumes for printed circuit board applications were mostly offset by favorable price/mix and higher volumes in memory disk applications. Sales in our Advanced Organics business were at approximately the same levels as the prior year.

Excluding the charges related to cost-reduction initiatives, adjusted operating profit in 2014 was $3.4 million lower than in 2013 due primarily to insurance proceeds of $3.7 million in 2013 that did not repeat in 2014, and lower sales volumes, partially offset by improved mix and lower operating expenses.

2013 Compared with 2012

The following table identifies the components of change in net sales and operating profit:

	Sales			Operating profit			Adjusted operating profit
2012	$	323.6		$	34.5		$	31.6
Increase (decrease) in 2012 from:
Volume	(3.4		)	(2.6		)	(2.6		)
Selling price/mix	(4.3		)	3.6			3.6
Foreign currency	1.8			0.2			(0.2		)
Charges related to cost-reduction initiatives	—			(1.1		)	—
Gain on sale of property	—			(2.9		)	—
Other	0.9			4.1			4.1
2013	$	318.6		$	35.8		$	36.9

Sales declined in 2013 compared to a year ago, as weak economic conditions in Europe and pricing pressures in a competitive environment negatively impacted customer demand for our Advanced Organics and Photomasks products. These decreases were partially offset by higher volumes and improved mix for our electronic chemicals products primarily in memory disk applications for mass data storage. The improved price/mix benefit is attributed to focused selling efforts to promote our highest performing products.

Excluding the 2012 land sale gain and charges in 2013 related to cost-reductions initiatives, adjusted operating profit in 2013 was $5.3 million higher than in 2012, as favorable mix and increased demand in electronic chemicals more than offset weaker demand in the other product lines. In addition, the 2013 amount includes income from insurance proceeds for reimbursement of a portion of operating expenses incurred and paid in prior years for environmental matters associated with a site closure.

Advanced Materials

During 2012 and through the date of sale, this business manufactured inorganic products using unrefined cobalt and other metals for a range of end markets. It also had a 55% interest in the DRC-based joint venture known as GTL prior to March 29, 2013.

As discussed above, we divested this business as of March 29, 2013. Activity in this segment beginning in the second quarter of 2013 represents performance under the transition agreements described above. The higher operating loss in 2014 reflects an increase in sales under the supply agreement in 2014 compared to a year ago.

For the year ended December 31,

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	2014			2013			2012
Net sales	$	102.6		$	166.3		$	447.0
Operating (loss) profit	$	(5.6	)	$	(0.4	)	$	6.4

Corporate Expenses

Corporate expenses consist of corporate overhead supporting the operating segments but not specifically allocated to an operating segment, including certain legal, finance, human resources and strategic development activities, as well as all share-based compensation across the enterprise.

2014 Compared with 2013

Corporate expenses were $33.6 million in 2014 compared with $38.5 million in 2013. Corporate expenses were lower in 2014 due to lower professional services fees, the benefit of Corporate cost-reduction initiatives in the current year and insurance proceeds of $1.3 million.

2013 Compared with 2012

Corporate expenses were $38.5 million in 2013 compared with $42.9 million in 2012. Corporate expenses were lower in 2013 due to a $2.5 million settlement charge in 2012 associated with 2012 lump-sum cash settlements to certain participants in one of our U.S. defined benefit pension plans, lower incentive compensation expense and lower professional services fees in 2013 and the benefit of Corporate cost-reduction initiatives in the current year.

Liquidity and Capital Resources

Cash Flow Summary

Our cash flows from operating, investing and financing activities for 2014, 2013 and 2012, as reflected in the Statements of Consolidated Cash Flows, are summarized and discussed in the following tables and related narrative:

	2014			2013			2012
Net cash provided by (used for):
Operating activities	$	85.4		$	62.9		$	209.5
Investing activities	(58.1		)	333.9			(56.5		)
Financing activities	(48.5		)	(503.7		)	(213.8		)
Effect of exchange rate changes on cash	(4.7		)	0.6			1.4
Decrease in cash from continuing operations	$	(25.9	)	$	(106.3	)	$	(59.4	)

Operating Activities

In 2014, net cash flow from operating activities was $85.4 million compared with $62.9 million in the prior year, largely due to lower cash requirements to fund operating assets and liabilities in 2014. Cash flows from operating activities can fluctuate significantly from period-to-period due to profitability, working capital changes and the timing of payments for items such as income taxes, pensions and other items.

In 2013, net cash flow from operating activities was $62.9 million compared $209.5 million in the prior year. 2012 cash flow performance benefited from declining commodity prices in the Advanced Materials business.

Investing Activities

In 2014, net cash used for investing activities included net cash paid of $24.6 million for the acquisition of Ener-Tek International, Inc. and capital expenditures of $34.5 million. Capital expenditures were made primarily to expand capacity; to maintain and improve productivity; for compliance with environmental, health and safety regulations; and for other fixed asset additions at existing facilities.

In 2013, net cash provided by investing activities in 2013 included net proceeds of $392.0 million from the divestitures of the Advanced Materials and UPC businesses, less capital expenditures of $53.1 million.

In 2012, net cash used in investing activities included capital expenditures of $67.6 million.

Financing Activities

Cash used for financing activities in 2014 primarily consisted of $35.2 million in repurchases of common stock and $9.3 million for dividends paid to stockholders, and $12.5 million of net borrowings under the Company's revolving line

23

of credit. In addition, we made payments of $16.2 million to the seller of VAC in 2014. We remain in discussions with the seller regarding the remainder of the withheld consideration of $46.2 million.

The cash used in financing activities in 2013 was primarily for prepayment of long-term debt using proceeds from divestitures of our Advanced Materials and UPC businesses, additional pre-payment of long-term debt utilizing cash on hand, repurchases of common stock, and payments made to the seller of VAC.

Net cash used in financing activities in 2012 included $466.5 million of debt repayments.

Financial Condition

Cash balances are held in numerous locations throughout the world. As of December 31, 2014, most of our cash and cash equivalents were held outside the United States, primarily in Germany. Most of the amounts held outside the U.S. could be repatriated to the U.S. but, under current law, would be subject to U.S. income taxes, less applicable foreign tax credits. Our intent is to retain the majority of our cash balances where generated and to meet U.S. liquidity needs through cash generated from operations in the U.S., limited repatriation of future foreign earnings, and external borrowings. We expect our available cash, 2015 operating cash flows and availability under our credit facility described below to be adequate to fund 2015 operating needs and capital expenditures.

Debt and Other Financing Activities

On September 4, 2013 we entered into a five-year Senior Secured Revolving Credit Facility (“the Facility”), and terminated our previous credit facility dated August 2, 2011 that was scheduled to expire in August 2016. The Facility provides for $350 million of revolving borrowing capacity and includes an expansion option of up to an additional $150 million, subject to certain conditions. The borrowers under the agreement are the Company, Harko C.V. (“Harko”), a limited partnership organized under the laws of the Netherlands, and VAC Germany GmbH (“VAC”), a limited liability company under the laws of Germany. Harko and VAC are wholly-owned subsidiaries of the Company. The Facility matures on September 4, 2018. As of December 31, 2014, we had $12.5 million outstanding under this credit facility, which was repaid with available cash in January 2015. In the first six months of 2013 we repaid the Term A and Term B loans under the previous credit facility with the proceeds from the divestitures of the Advanced Materials and UPC businesses, as required, and cash on hand. See Note 7 in the Notes to Consolidated Financial Statements included in Item 8 of this Form 10-K for further discussion of the Facility.

Pension Plans

As a result of the VAC acquisition, we hold pension obligations of $184.0 million as of December 31, 2014, substantially all of which are unfunded. VAC sponsors various defined benefit plans for its employees, including pension, early retirement benefits and anniversary benefits, mainly in Germany. As a result of the EaglePicher acquisition, we assumed the EaglePicher defined benefit pension obligations, made up of two frozen and two active, partially-funded defined benefit pension plans. Certain non-U.S. employees are covered under other defined benefit plans. See Critical Accounting Policies below and Note 11 in the Notes to Consolidated Financial Statements included in Item 8 of this Form 10-K for further discussion of our pension plans.

Contractual Obligations

We have entered into contracts with various third parties in the normal course of business that will require future payments. The following table summarizes our contractual cash obligations and their expected maturities at December 31, 2014.

	Payments due by period
	2015		2016		2017		2018		2019		Thereafter		Total
Purchase and other obligations(1)	$	185.5	$	5.5	$	1.8	$	1.8	$	1.2	$	0.6	$	196.4
Capital lease obligations (principal and interest)	0.7		0.7		0.6		0.4		0.4		0.4		3.2
Operating lease obligations	6.6		6.0		5.1		3.4		2.1		8.2		31.4
Total	$	192.8	$	12.2	$	7.5	$	5.6	$	3.7	$	9.2	$	231.0

(1) For 2015 through 2019, purchase obligations include raw material contractual obligations reflecting estimated future payments based on committed tons of material per the applicable contract multiplied by the reference price of each metal. The price used in the computation is the average price for the month of December 2014 for each respective metal. Commitments made under these contracts represent future purchases in line with expected usage.

24

Not included in the table above is $46.2 million of the VAC purchase price we withheld to fund indemnification claims. See Note 5 to the Consolidated Financial Statements included in Item 8 of this Form 10-K for further discussion of the amount withheld.

Pension funding can vary significantly each year due to changes in the market value of plan assets, legislation and our funding decisions to contribute any excess above the minimum legislative funding requirements. As a result, pension funding has not been included in the table above. We expect to contribute $0.7 million to our U.S. pension plans in 2015. Pension benefit payments for the U.S. pension plans are made from assets of the pension plans. We expect to make annual benefit payments of approximately $10.7 million related to our non-U.S. pension plans in 2015.

At December 31, 2014, the liability for uncertain tax positions includes $5.9 million for which it is reasonably possible the uncertainty will be resolved within the next twelve months. We are not able to reasonably estimate the period in which cash outflows related to the remaining $7.8 million of uncertain tax positions could occur, if at all. See Note 10 to the Consolidated Financial Statements included in Item 8 of this Form 10-K for further discussion of our uncertain tax positions.

Off Balance Sheet Arrangements

We have not entered into any off balance sheet financing arrangements, other than operating leases, which are disclosed in the contractual obligations table above and in Note 16 to the Consolidated Financial Statements included in Item 8 of this Form 10-K.

Critical Accounting Policies

The preparation of these financial statements in conformity with US generally accepted accounting principles ("US GAAP") requires our management to make its best estimates, judgments and assumptions of certain amounts included in the financial statements related to the critical accounting policies described below. Actual results could differ from our estimates. In addition, other companies may utilize different estimates, which may impact the comparability of our results of operations to similar businesses.

Revenue Recognition — Revenues are recognized when the revenue is realized or realizable, and has been earned, in accordance with the U.S. Securities and Exchange Commission’s Staff Accounting Bulletin No. 104, “Revenue Recognition". The majority of our sales are product sales, which are recognized when persuasive evidence of an arrangement exists, unaffiliated customers take title and assume risk of loss, the sales price is fixed or determinable and collection of the related receivable is reasonably assured. Revenue recognition generally occurs upon shipment of product or usage of consignment inventory. Freight costs and any directly related associated costs of transporting finished product to customers are recorded as Cost of goods sold.

The Battery Technologies segment uses the percentage-of-completion method to recognize the majority of its revenue. See Note 1 in our Consolidated Financial Statements included in Item 8 of this Form 10-K for a more complete discussion on revenue recognized under the percentage of completion method.

Inventories — Magnetic Technologies' inventories are valued using the average cost method. Cost of sales, under the average cost method, represents the weighted average cost of the items sold. We believe the average cost method provides for a better matching of inventory costs with related sales, based on Magnetic Technologies' manufacturing process. The remaining inventory held is valued using the first-in, first-out (“FIFO”) method. Inventory accounted for under the percentage-of-completion method is included in work-in-process inventory and represents accumulated contract costs less the portion of such costs allocated to delivered units. The costs attributed to units delivered are based on the estimated average cost of all units expected to be produced on a contract-by-contract basis.

We evaluate the need for a lower of cost or market (“LCM”) adjustment to inventories based on the selling prices of our finished products. Changes in the price of rare earth and other materials can have a significant impact on inventory valuation. Declines in the selling prices of finished goods due to decreases in the market price of raw materials or other factors can result in the inventory carrying value being written down to a lower market value.

Goodwill — We had goodwill of $252.6 million and $432.7 million at December 31, 2014 and 2013, respectively. We test goodwill for impairment annually and more often if indicators of impairment exist. Our reporting units have been determined to be our reportable segments or one level below the reportable segments in certain instances.

We estimate the fair value of a reporting unit (including goodwill) and compare that amount to the carrying value of that reporting unit. If the estimated fair value of the reporting unit is less than its carrying value, a second step would be undertaken to determine the implied fair value of goodwill of the reporting unit, which is then compared with the carrying value of the goodwill of the reporting unit. This second step would include valuing all of the tangible and

25

intangible assets and liabilities of the reporting unit as if they had been acquired in a business combination on the testing date.

We conduct our annual goodwill impairment test as of October 1. The results of testing as of October 1, 2014 for all reporting units except Magnetic Technologies confirmed that the estimated fair value of each of the reporting units substantially exceeded its carrying value and no impairment loss was required to be recognized. During a strategic evaluation by the management team, led by the new business leader, of the business and of various opportunities to optimize performance, we noted indicators of potential impairment in the Magnetic Technologies business, including deteriorating European macroeconomic conditions and increasing competition. The resulting test confirmed that the carrying value of the Magnetic Technologies business exceeded its fair value for goodwill. In the fourth quarter of 2014, we performed the second step as discussed above and goodwill impairment of $168.7 million was recognized.

The results of testing as of October 1, 2013 and 2012 for all reporting units except Magnetic Technologies in 2012 confirmed that the estimated fair value of each of the reporting units substantially exceeded its carrying value and no impairment loss was required to be recognized. The October 1, 2012 estimated fair value of the Magnetic Technologies reporting unit exceeded its carrying value by 4%.

We estimated the fair value of the reporting units utilizing a discounted cash flow valuation technique (“DCF”). We selected DCF as we believe it is comparable to what would be used by market participants to estimate its fair value. The impairment test incorporates our judgment and estimates of future cash flows, future growth rates, terminal value amounts, allocations of certain assets, liabilities and cash flows among reporting units, and the applicable weighted-average cost of capital used to discount those estimated cash flows. The estimates and projections used in the estimate of fair value are consistent with our current budget and long-range plans, including anticipated changes in market conditions, industry trends, growth rates, and planned capital expenditures, among other considerations. See Note 6 in our Consolidated Financial Statements included in Item 8 of this Form 10-K for a more complete discussion of goodwill.

Other Intangible Assets — Intangible assets consist of (i) definite-lived assets subject to amortization and (ii) indefinite-lived intangible assets not subject to amortization. At December 31, 2014 and 2013, we had definite-lived intangible assets of$247.0 million and $288.9 million and indefinite-lived intangible assets of $77.8 million and $114.1 million, respectively. Definite-lived intangible assets consist principally of customer relationships, know-how, developed technology and capitalized software and are being amortized using the straight-line or other appropriate methods if applicable. Indefinite-lived intangible assets consist of tradenames. The carrying values of indefinite-lived intangible assets are also evaluated for impairment annually utilizing the discounted cash flow method based on royalty relief as of October 1 and whenever events or changes in circumstances indicate that the carrying value may not be recoverable. The definite-lived intangible asset would be considered impaired if the future net undiscounted cash flows generated by the asset are less than its carrying value. During a strategic evaluation by the management team we noted indicators of potential impairment at the Magnetic Technologies business as discussed above. In the fourth quarter of 2014, we performed the discounted cash flow calculation based on a relief of royalty method and determined that the value for the Magnetic Technologies tradename was less than the carrying value and a tradename impairment of $26.7 million was recognized.

Long-lived Assets - The goodwill and intangible asset impairment led to an impairment review of the Magnetic Technologies long-lived assets other than goodwill and indefinite lived intangibles. The future net undiscounted cash flows generated by the assets were greater than the carrying value, indicating no impairment of long-lived assets.

Pension Plans — Our long-term pension obligations as of December 31, 2014 amounted to $244.4 million. In addition, we have an unfunded obligation to our former chief executive officer in settlement of an unfunded supplemental executive retirement plan (“SERP”). Calculations of the amount of defined benefit pension expense and obligations depend on the assumptions used in the actuarial valuations including the discount rate used in calculating the present value of benefits, the expected long-term rate of return on defined benefit plan assets, and the rate of compensation increase. Changes in key economic indicators can result in changes in the assumptions we use. While we believe that the assumptions used in calculating our defined benefit pension expense and obligations are appropriate, differences in actual experience or changes in the assumptions may affect our results of operations or financial position.

For the VAC defined benefit pension obligations, we used a weighted average discount rate of 2.0% in computing the amount of the defined benefit pension obligations to be recorded at December 31, 2014. A 25 basis point reduction in the discount rate used for the plans would have increased the net obligation by $4.7 million from the amount recorded in the financial statements at December 31, 2014.

26

For the EaglePicher defined benefit pension obligations, we used a weighted average discount rate of 3.5% and 3.7%for the two active and two frozen EaglePicher plans, respectively, in computing the amount of the defined benefit pension obligations to be recorded at December 31, 2014. A 25 basis point reduction in the discount rate used for the plans would have increased the net obligation related to the four EaglePicher plans by $5.3 million from the amount recorded in the financial statements at December 31, 2014.

Defined benefit pension plan assets consist primarily of publicly traded stocks and government and corporate bonds. There is no guarantee the actual return on the plans' assets will equal the expected long-term rate of return on plan assets or that the plans will not incur investment losses. For 2014, the expected long-term rate of return assumptions applicable to assets held in the four EaglePicher plans offsetting the obligation was an estimated 6.5% for the two active and two frozen plans. These expected rates of return reflect the asset allocation of the plans and the expected long-term returns on equity and debt investments included in plan assets. If the expected long-term rates of return on plan assets in the four EaglePicher plans were reduced by 50 basis points, pension expense for 2014 would have increased by $0.8 million.

See Note 11 in our Consolidated Financial Statements included in Item 8 of this Form 10-K for a more complete discussion of pension plans.

Income Taxes — Significant judgment is required in determining our income tax expense and in evaluating tax positions. Deferred income tax assets and liabilities have been recorded for the differences between the financial accounting and income tax basis of assets and liabilities. When we determine, based on all available evidence, that it is more likely than not that deferred tax assets will not be realized, a valuation allowance is established. We assess our income tax positions and record accruals when we determine that a position is more likely than not to be unsustainable. The ultimate resolution of these events could result in adjustments to our financial statements and such adjustments could be material. We believe the current assumptions, judgments and other considerations used to estimate the current year accrued and deferred tax positions are appropriate. If the actual outcome of future tax consequences differs from these estimates and assumptions, due to changes or future events, the resulting change to the provision for income taxes could have a material impact on our results of operations and financial position. We review our tax positions on a regular basis and adjust the balances as new information becomes available. See Note 10 in our Consolidated Financial Statements included in Item 8 of this Form 10-K for a more complete discussion of income taxes.

Share-Based Compensation — We use a Black-Scholes option pricing model to calculate the fair value of our stock options. The fair value of time-based and performance-based restricted stock grants is calculated based upon the market value of an unrestricted share of our common stock at the date of grant. The performance-based restricted stock vests solely upon our achievement of specific measurable performance objectives over a three-year performance period, and the related compensation expense is based upon current performance projections. This requires the use of assumptions, including estimating the length of time employees will retain their vested stock options before exercising and the volatility of the our common stock price. Expected stock price volatility is based on historical volatility of our stock price. Changes in these assumptions may result in a material change to the fair value calculation of share-based awards. See Note 14 in our Consolidated Financial Statements included in Item 8 of this Form 10-K for a more complete discussion of share-based compensation.

Acquisitions - The allocation of the purchase price to the tangible assets and liabilities and identifiable intangible assets acquired requires management to make significant estimates in determining the fair values of assets acquired and liabilities assumed, especially with respect to intangible assets in the Ener-Tek and VAC acquisitions and inventory in the VAC acquisition. These estimates are based on historical experience, information obtained from management of the acquired companies, and future volume forecasts with respect to the contingent consideration. These estimates are dependent on assumptions that are difficult to predict, and if different estimates were used, the purchase price for the acquisition may have been allocated to the acquired assets differently from the current allocation. Although we believe the assumptions, judgments and estimates used are reasonable and appropriate, different assumptions, judgments and estimates could materially affect the value ascribed to an acquired asset and, potentially, our results of operations and financial position if impairment charges were required to be recorded.

Recently Issued Accounting Standards

See Note 2 in our Consolidated Financial Statements included in Item 8 of this Form 10-K for recently issued accounting standards and the effects, if any, on our financial statements.

27

Effects of Foreign Currency

See Item 7A for a discussion of our foreign currency effects and related risks.

Environmental Matters

We are subject to a wide variety of environmental laws and regulations in the United States and in other countries as a result of our operations and use of certain substances that are, or have been, used, produced or discharged by our plants. In addition, soil and/or groundwater contamination presently exists and may in the future be discovered at levels that require remediation under environmental laws at properties we now or previously owned, operated or used.

Due to the ongoing development and understanding of facts and remedial options and due to the possibility of unanticipated regulatory developments, the amount and timing of future environmental expenditures could vary significantly. Although it is difficult to quantify the potential impact of compliance with or liability under environmental protection laws, based on presently available information, we believe that our ultimate aggregate cost of environmental remediation as well as liability under environmental protection laws will not result in a material adverse effect upon our financial condition or results of operations.

See Item I of this Annual Report on Form 10-K for further discussion of these matters.

Cautionary Statement for “Safe Harbor” Purposes under the Private Securities Litigation Reform Act of 1995

The Private Securities Litigation Reform Act of 1995 provides a safe harbor for forward-looking statements made by or on behalf of the Company. This report contains statements that we believe may be “forward-looking statements” within the meaning of Section 21E of the Securities Exchange Act of 1934. These forward-looking statements are not historical facts and generally can be identified by use of statements that include words such as “believe,” “expect,” “anticipate,” “intend,” “plan,” “foresee” or other words or phrases of similar import. Similarly, statements that describe our business objectives, plans or goals also are forward-looking statements. These forward-looking statements are based upon specific assumptions and are subject to uncertainties and factors relating to the company's operations and business environment, all of which are difficult to predict and many of which are beyond our control. These uncertainties and factors could cause actual results of the company to differ materially from those expressed or implied in the forward-looking statements. We undertake no obligation to publicly revise these forward-looking statements to reflect events or circumstances that arise after the date hereof. Significant factors affecting these expectations are set forth under Item 1A — Risk Factors in this Annual Report on Form 10-K.

Item 7A.  Quantitative and Qualitative Disclosures about Market Risk

Quantitative and Qualitative Disclosures about Market Risk

As a result of our global operating and financing activities, we are exposed to changes in raw material prices, interest rates and foreign currency exchange rates, which may have a material adverse effect on our business, financial condition and results of operation. In seeking to minimize the risks and/or costs associated with such activities, we manage exposures to changes in raw material prices, interest rates and foreign currency exchange rates through our regular operating and financing activities, which may include the use of derivative instruments.

Raw Material Price Risk

The primary raw materials used by Magnetic Technologies are nickel, cobalt and certain rare earth materials, mostly dysprosium and neodymium. The cost of raw materials fluctuates due to changes in the reference prices (rare earths), actual or perceived changes in supply and demand of raw materials and changes in availability from suppliers. Fluctuations in the price of rare earth materials and other raw materials have been significant in the past and we believe price fluctuations could occur in the future.

We attempt to mitigate increases in raw material prices by passing through such increases to our customers in the prices of our products and, when possible, by entering into sales contracts that contain variable pricing that adjusts based on changes in the price of certain raw materials. During periods of rapidly changing metal prices there may be price lags that can positively or negatively impact the short-term profitability and cash flow from operations of the Company. Declines in the selling prices of our finished goods, which can result from decreases in the market price of raw materials or other factors, can result in our inventory carrying value being written down to a lower market value.

From time to time we employ derivative instruments in connection with certain purchases and sales of nickel in order to establish a fixed margin and mitigate the risk of price volatility. This hedging limits our ability to participate in gains from favorable commodity price fluctuations and limits the risk of loss from adverse commodity price fluctuations.

28

Interest Rate Risk

We are exposed to interest rate risk primarily through our borrowing activities. There is an inherent rollover risk for borrowings as they mature and are renewed at current market rates. The extent of this risk is not quantifiable or predictable because of the variability of future interest rates and business financing requirements (see Note 7 in our Consolidated Financial Statements contained in Item 8 of this Annual Report).

From time-to-time, we enter into derivative instruments and hedging activities to manage interest rate risk related to borrowings. We use interest rate swap agreements to partially reduce risks related to floating rate financing agreements that are subject to changes in the market rate of interest. Terms of the interest rate swap agreements require us to receive a variable interest rate and pay a fixed interest rate. We had no outstanding interest rate swaps of December 31, 2013 or 2014.

Foreign Currency Exchange Rate Risk

We manufacture and sell our products worldwide. Prices of certain raw materials, non-U.S. operating expenses and income taxes are denominated in local currencies. As such, the results of operations are subject to the variability that arises from exchange rate movements (particularly the Euro). In addition, fluctuations in exchange rates may affect product demand and profitability in U.S. dollars of products we provide in foreign markets in cases where payments for our products are made in local currency. Accordingly, fluctuations in currency prices affect the Company’s operating results. The primary currencies for which we have foreign currency rate exposure are the European Union Euro, Taiwanese Dollar, Malaysian Ringgit, Singapore Dollar, British Pound Sterling, Chinese Renminbi and the Canadian Dollar.

Item 8.  Financial Statements and Supplementary Data

Report of Independent Registered Public Accounting Firm

The Board of Directors and Stockholders of OM Group, Inc. and subsidiaries

We have audited the accompanying consolidated balance sheets of OM Group, Inc. and subsidiaries as of December 31, 2014 and 2013, and the related statements of consolidated operations, consolidated comprehensive loss, consolidated total stockholders' equity, and consolidated cash flows for each of the three years in the period ended December 31, 2014. Our audits also included the financial statement schedule listed in the index at Item 15. These financial statements and schedule are the responsibility of the Company’s management. Our responsibility is to express an opinion on these financial statements and schedule based on our audits.

We conducted our audits in accordance with the standards of the Public Company Accounting Oversight Board (United States). Those standards require that we plan and perform the audit to obtain reasonable assurance about whether the financial statements are free of material misstatement. An audit includes examining, on a test basis, evidence supporting the amounts and disclosures in the financial statements. An audit also includes assessing the accounting principles used and significant estimates made by management, as well as evaluating the overall financial statement presentation. We believe that our audits provide a reasonable basis for our opinion.

In our opinion, the financial statements referred to above present fairly, in all material respects, the consolidated financial position of OM Group, Inc. and subsidiaries at December 31, 2014 and 2013, and the consolidated results of its operations and its cash flows for each of the three years in the period ended December 31, 2014, in conformity with U.S. generally accepted accounting principles. Also, in our opinion, the related financial statement schedule, when considered in relation to the basic financial statements taken as a whole, presents fairly in all material respects the information set forth therein.

We also have audited, in accordance with the standards of the Public Company Accounting Oversight Board (United States), OM Group, Inc. and subsidiaries’ internal control over financial reporting as of December 31, 2014, based on criteria established in Internal Control-Integrated Framework issued by the Committee of Sponsoring Organizations of the Treadway Commission (2013 framework) and our report dated March 2, 2015, expressed an unqualified opinion thereon.

/s/ Ernst & Young LLP

Cleveland, Ohio

March 2, 2015

Report of Independent Registered Public Accounting Firm

The Board of Directors and Stockholders of OM Group, Inc. and subsidiaries

We have audited OM Group, Inc. and subsidiaries’ internal control over financial reporting as of December 31, 2014, based on criteria established in Internal Control-Integrated Framework issued by the Committee of Sponsoring Organizations of the Treadway Commission “(2013 framework)” (the COSO criteria). OM Group, Inc. and subsidiaries’ management is responsible for maintaining effective internal control over financial reporting, and for its assessment of the effectiveness of internal control over financial reporting included in the accompanying Management’s Report on Internal Control over Financial Reporting. Our responsibility is to express an opinion on the company’s internal control over financial reporting based on our audit.

We conducted our audit in accordance with the standards of the Public Company Accounting Oversight Board (United States). Those standards require that we plan and perform the audit to obtain reasonable assurance about whether effective internal control over financial reporting was maintained in all material respects. Our audit included obtaining an understanding of internal control over financial reporting, assessing the risk that a material weakness exists, testing and evaluating the design and operating effectiveness of internal control based on the assessed risk, and performing such other procedures as we considered necessary in the circumstances. We believe that our audit provides a reasonable basis for our opinion.

A company’s internal control over financial reporting is a process designed to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with generally accepted accounting principles. A company’s internal control over financial reporting includes those policies and procedures that (1) pertain to the maintenance of records that, in reasonable detail, accurately and fairly reflect the transactions and dispositions of the assets of the company; (2) provide reasonable assurance that transactions are recorded as necessary to permit preparation of financial statements in accordance with generally accepted accounting principles, and that receipts and expenditures of the company are being made only in accordance with authorizations of management and directors of the company; and (3) provide reasonable assurance regarding prevention or timely detection of unauthorized acquisition, use or disposition of the company’s assets that could have a material effect on the financial statements.

Because of its inherent limitations, internal control over financial reporting may not prevent or detect misstatements. Also, projections of any evaluation of effectiveness to future periods are subject to the risk that controls may become inadequate because of changes in conditions, or that the degree of compliance with the policies or procedures may deteriorate.

In our opinion, OM Group, Inc. and subsidiaries maintained, in all material respects, effective internal control over financial reporting as of December 31, 2014, based on the COSO criteria.

We also have audited, in accordance with the standards of the Public Company Accounting Oversight Board (United States), the consolidated balance sheets as of December 31, 2014 and 2013, and the related statements of consolidated operations, consolidated comprehensive loss, consolidated total stockholders' equity, and consolidated cash flows for each of the three years in the period ended December 31, 2014 of OM Group, Inc. and subsidiaries and our report dated March 2, 2015 expressed an unqualified opinion thereon.

/s/ Ernst & Young LLP        

Cleveland, Ohio    

March 2, 2015

29

OM Group, Inc. and Subsidiaries

Consolidated Balance Sheets

	December 31, 2014				December 31, 2013
(In millions, except share and per share data)
ASSETS
Current assets
Cash and cash equivalents	$	91.7			$	118.4
Accounts receivable, less allowance of $2.5 in 2014 and $3.9 in 2013	134.5				150.7
Inventories	228.4				240.9
Other current assets	21.5				32.3
Total current assets	476.1				542.3
Property, plant and equipment, net	308.3				345.6
Goodwill	252.6				432.7
Intangible assets, net	324.8				403.0
Other non-current assets	57.7				59.5
Total assets	$	1,419.5			$	1,783.1
LIABILITIES AND STOCKHOLDERS’ EQUITY
Current liabilities
Revolving credit facility	$	12.5			$	—
Accounts payable	74.7				93.6
Accrued income taxes	5.6				4.2
Accrued employee costs	34.9				36.2
Purchase price of VAC payable to seller	46.2				52.5
Other current liabilities	51.8				59.2
Total current liabilities	225.7			—	245.7
Deferred income taxes	74.8				102.5
Pension liabilities	244.4				220.5
Purchase price of VAC payable to seller	—				11.3
Other non-current liabilities	37.7				43.3
Stockholders’ equity:
Preferred stock, $.01 par value:
Authorized 2,000,000 shares, no shares issued or outstanding	—				—
Common stock, $.01 par value:
Authorized 90,000,000 shares; 32,408,222 shares issued in 2014 and 32,304,490 shares issued in 2013	0.3				0.3
Capital in excess of par value	647.3				639.8
Retained earnings	405.3				587.2
Treasury stock (2,136,116 shares in 2014 and 825,956 shares in 2013, at cost)	(58.2		)		(22.3		)
Accumulated other comprehensive loss	(157.8		)		(45.2		)
Total stockholders' equity	836.9				1,159.8
Total liabilities and stockholders' equity	$	1,419.5			$	1,783.1

See accompanying notes to consolidated financial statements.

OM Group, Inc. and Subsidiaries

Statements of Consolidated Operations

	Year Ended December 31
	2014			2013			2012
(In millions, except per share data)
Net sales	$	1,067.5		$	1,157.5		$	1,544.4
Cost of goods sold	829.3			899.1			1,300.8
Gross profit	238.2			258.4			243.6
Selling, general and administrative expenses	207.9			217.3			251.2
Goodwill and intangible asset impairment	195.4			—			—
Gain on sale of property	—			—			(2.9		)
Operating profit (loss)	(165.1		)	41.1			(4.7		)
Other income (expense):
Interest expense	(2.6		)	(12.3		)	(49.7		)
Foreign exchange gain (loss)	(6.5		)	8.0			(0.8		)
Gain (loss) on divestiture of Advance Materials business	1.7			(111.6		)	—
Other, net	(0.3		)	12.0			6.6
	(7.7		)	(103.9		)	(43.9		)
Loss from continuing operations before income tax expense	(172.8		)	(62.8		)	(48.6		)
Income tax expense (benefit)	(0.5		)	10.7			(3.2		)
Loss from continuing operations, net of tax	(172.3		)	(73.5		)	(45.4		)
Loss from discontinued operations, net of tax	(0.3		)	(12.3		)	(0.4		)
Consolidated net loss	(172.6		)	(85.8		)	(45.8		)
Net loss attributable to noncontrolling interests	—			1.8			7.1
Loss attributable to OM Group, Inc. common stockholders	$	(172.6	)	$	(84.0	)	$	(38.7	)
Earnings per common share — basic:
Loss from continuing operations attributable to OM Group, Inc.common stockholders	$	(5.54	)	$	(2.27	)	$	(1.21	)
Loss from discontinued operations attributable to OM Group, Inc. common stockholders	(0.01		)	(0.39		)	(0.01		)
Net loss attributable to OM Group, Inc. common stockholders	$	(5.55	)	$	(2.66	)	$	(1.22	)
Earnings per common share — assuming dilution:
Loss from continuing operations attributable to OM Group, Inc. common stockholders	$	(5.54	)	$	(2.27	)	$	(1.21	)
Loss from discontinued operations attributable to OM Group, Inc. common stockholders	(0.01		)	(0.39		)	(0.01		)
Net loss attributable to OM Group, Inc. common stockholders	$	(5.55	)	$	(2.66	)	$	(1.22	)
Weighted average shares outstanding
Basic	31.1			31.6			31.9
Assuming dilution	31.1			31.6			31.9
Dividends declared per common share	$	0.30		$	—		$	—
Amounts attributable to OM Group, Inc. common stockholders:
Loss from continuing operations, net of tax	$	(172.3	)	$	(71.7	)	$	(38.3	)
Loss from discontinued operations, net of tax	(0.3		)	(12.3		)	(0.4		)
Net loss	$	(172.6	)	$	(84.0	)	$	(38.7	)

See accompanying notes to consolidated financial statements.

OM Group, Inc. and Subsidiaries

Statements of Consolidated Comprehensive Loss

	Year Ended December 31
	2014			2013			2012
(In millions)
Consolidated net loss	$	(172.6	)	$	(85.8	)	$	(45.8	)
Foreign currency translation adjustments	(81.7		)	25.0			20.7
Reclassification of hedging activities into earnings, net of tax	0.2			0.2			(1.9		)
Unrealized (loss) gain on cash flow hedges, net of tax	—			(0.3		)	5.9
Pension and post-retirement obligation, net of tax	(31.1		)	17.9			(19.3		)
Net change in accumulated other comprehensive income (loss)	(112.6		)	42.8			5.4
Comprehensive loss	(285.2		)	(43.0		)	(40.4		)
Comprehensive loss attributable to noncontrolling interests	—			1.8			7.1
Comprehensive loss attributable to OM Group, Inc.	$	(285.2	)	$	(41.2	)	$	(33.3	)

See accompanying notes to consolidated financial statements.

OM Group, Inc. and Subsidiaries

Statements of Consolidated Cash Flows

	Year Ended December 31
(In millions)	2014			2013			2012
Operating activities
Consolidated net loss	$	(172.6	)	$	(85.8	)	$	(45.8	)
Adjustments to reconcile consolidated net loss to net cash provided by operating activities:
Loss from discontinued operations	0.3			12.3			0.4
Depreciation and amortization	67.5			73.9			84.3
Goodwill and intangible asset impairment charges	195.4			—			—
Share-based compensation expense	7.6			6.2			5.8
Foreign exchange loss (gain)	6.5			(8.0		)	0.8
Deferred income tax benefit	(17.2		)	(7.3		)	(30.2		)
VAC lower of cost or market ("LCM") charges	—			—			78.4
(Gain) loss on divestiture of Advanced Materials business	(1.7		)	111.6			—
Adjustment to contingent consideration	—			(13.0		)	—
Other non-cash items	9.0			5.5			0.1
Changes in operating assets and liabilities, excluding the effect of business acquisitions:
Accounts receivable	11.5			(22.3		)	39.4
Inventories (includes $18.4 million of step-up amortization in 2012)	3.8			25.0			75.7
Accounts payable	(15.5		)	12.5			(43.0		)
Refundable, prepaid and accrued income taxes	1.8			(21.1		)	41.2
Other, net	(11.0		)	(26.6		)	2.4
Net cash provided by operating activities	85.4			62.9			209.5
Investing activities
Expenditures for property, plant and equipment	(34.5		)	(53.1		)	(67.6		)
Proceeds from divestiture of Advanced Materials business	—			328.7			—
Proceeds from divestiture of UPC business	—			63.3			—
Cash (paid) for acquisitions or received from purchase adjustments	(24.6		)	—			6.0
Other, net	1.0			(5.0		)	5.1
Net cash provided by (used for) investing activities	(58.1		)	333.9			(56.5		)
Financing activities
Dividends paid	(9.3		)	—			—
Payments on long-term debt	—			(466.5		)	(213.5		)
Proceeds from revolving line of credit	14.5			—			—
Payments on revolving line of credit	(2.0		)	—			—
Payments related to VAC purchase price payable	(16.2		)	(23.0		)	—
Debt issuance costs	(0.1		)	(2.3		)	—
Payment related to surrendered shares	(0.7		)	(0.6		)	(0.3		)
Share repurchases	(35.2		)	(14.1		)	—
Proceeds from exercise of stock options	0.5			2.8			—
Net cash used for financing activities	(48.5		)	(503.7		)	(213.8		)
Effect of exchange rate changes on cash	(4.7		)	0.6			1.4
Cash and cash equivalents
Decrease from continuing operations	(25.9		)	(106.3		)	(59.4		)
Discontinued operations — net cash provided by (used) for operating activities	(0.8		)	(0.5		)	(1.0		)
Discontinued operations — net cash used for investing activities	—			(2.4		)	(4.1		)
Balance at the beginning of the year	118.4			227.6			292.1
Balance at the end of the year	$	91.7		$	118.4		$	227.6

See accompanying notes to consolidated financial statements

30

OM Group, Inc. and Subsidiaries

Statements of Consolidated Total Stockholders' Equity

	Year Ended December 31
	2014			2013			2012
(In millions, except share data)
Common Stock — Shares Outstanding, net of Treasury Shares (000's)
Beginning balance	31,479			31,906			31,865
Shares repurchased	(1,310		)	(609		)	(9		)
Shares issued under share-based compensation plans	103			182			50
	30,272			31,479			31,906
Common Stock — Dollars
Beginning balance	$	0.3		$	0.3		$	0.3
Shares issued (rounds to less than $0.1)	—			—			—
	0.3			0.3			0.3
Capital in Excess of Par Value
Beginning balance	639.8			631.1			625.5
Shares issued under share-based compensation plans	0.5			2.8			—
Share-based compensation — employees	6.5			5.4			5.0
Share-based compensation — non-employee directors	0.5			0.5			0.5
	647.3			639.8			631.1
Retained Earnings
Beginning balance	587.2			671.2			709.9
Net loss attributable to OM Group, Inc.	(172.6		)	(84.0		)	(38.7		)
Common stock cash dividends	(9.3		)	—			—
	405.3			587.2			671.2
Treasury Stock
Beginning balance	(22.3		)	(7.7		)	(7.4		)
Reacquired shares	(35.9		)	(14.6		)	(0.3		)
	(58.2		)	(22.3		)	(7.7		)
Accumulated Other Comprehensive Loss
Beginning balance	(45.2		)	(88.0		)	(93.4		)
Foreign currency translation	(81.7		)	25.0			20.7
Reclassification of hedging into earnings, net of tax	0.2			0.2			(1.9		)
Unrealized (loss) gain on cash flow hedges, net of tax	—			(0.3		)	5.9
Pension and post-retirement obligation, net of tax	(31.1		)	17.9			(19.3		)
	(157.8		)	(45.2		)	(88.0		)
Total OM Group Inc. Stockholders’ Equity	836.9			1,159.8			1,206.9
Noncontrolling interests
Beginning balance	—			37.4			44.5
Loss attributable to the noncontrolling interest	—			—			(7.1		)
Sale of noncontrolling interest	—			(37.4		)	—
	—			—			37.4
Total Equity	$	836.9		$	1,159.8		$	1,244.3

See accompanying notes to consolidated financial statements

Notes to Consolidated Financial Statements

OM Group, Inc. and Subsidiaries

(In millions, except as noted and share and per share amounts)

Note 1 — Significant Accounting Policies

Principles of Consolidation — OM Group, Inc. (the “Company”, “we”, “our”, “us”) is a technology-driven industrial company serving attractive global markets, including automotive systems, electronic devices, aerospace and defense, industrial and medical. We use innovative technologies to address customers' complex applications and demanding requirements. Our strategy is to grow organically through product and application innovation and new market and customer development, to grow strategically through complementary acquisitions to build-out our growth platforms, and to maximize total stockholder returns through a combination of business growth, financial discipline, optimal deployment of capital and continued operational excellence. Our objective is to deliver sustainable, profitable growth and create long-term stockholder value. The consolidated financial statements include the accounts of OM Group and its consolidated subsidiaries. We were formed in 1991 as a Delaware Corporation. Intercompany accounts and transactions have been eliminated in consolidation.

Certain financial data may have been rounded. As a result of such rounding, the totals of data presented in this document may vary slightly from the actual arithmetical totals of such data.

On November 24, 2014, we completed the acquisition of Ener-Tek International, Inc., which operates under the brand name Yardney Technical Products ("Yardney"), and now operates as a part of our Battery Technologies business. Based in East Greenwich, Rhode Island, Yardney is a designer, developer and manufacturer of high-performance lithium-ion and silver-zinc cells and batteries for niche applications in the defense and aerospace markets. We funded the $24.6 million acquisition price through existing cash balances.

On May 31, 2013, we completed the sale of our Ultra Pure Chemicals business. The results of our Ultra Pure Chemicals business are reported as discontinued operations in the accompanying unaudited condensed consolidated financial statements and Notes to Consolidated Financial Statements for all periods presented. See note 5 - Acquisitions and Divestitures.

On March 29, 2013, we completed the divestiture of our cobalt-based business. The transaction comprised the sale of the downstream portion of the business, (including its cobalt refinery assets in Kokkola, Finland) and the transfer of our 55% equity interests in the DRC-based joint venture known as GTL to the joint venture partners, subject to a security interest in our favor with respect to the joint venture's performance related to certain supply agreements. Until March 29, 2013, we consolidated the GTL joint venture because we had a controlling interest. Non-controlling interest was recorded for the remaining 45% interest. See note 5 - Acquisitions and Divestitures.

The financial position, results of operations and cash flows of acquisitions are included in the Consolidated Financial Statements from the dates of acquisition.

Unless otherwise indicated, all disclosures and amounts in the Notes to Consolidated Financial Statements relate to the Company's continuing operations.

Use of Estimates - The preparation of financial statements, in conformity with US generally accepted accounting policies ("US GAAP"), requires management to make estimates and assumptions in certain circumstances that affect the amounts reported in the accompanying consolidated financial statements and notes. Actual results could differ from these estimates.

Cash Equivalents - All highly-liquid investments, with a maturity of three months or less when purchased, are considered to be cash equivalents.

Allowance for Doubtful Accounts - We have recorded an allowance for doubtful accounts to record accounts receivable at their estimated net realizable value. The allowance is based upon an analysis of historical bad debts, a review of the aging of accounts receivable and the current creditworthiness of customers. Accounts are written off against the allowance when it becomes probable that collections will not occur. Trade credit is generally extended on a short-term basis and accounts receivable generally do not bear interest.

Inventories - Magnetic Technologies' inventories are valued using the average cost method. Cost of sales under the average cost method represents the weighted average cost of the items sold. We believe the average cost method provides for a better matching of inventory costs with related sales based on Magnetic Technologies' manufacturing process. Our remaining inventory is valued using First in, First out (FIFO). Inventory costs include raw materials, labor and manufacturing overhead. Inventory accounted for under the percentage-of-completion method is included in work-in-process inventory and represents accumulated contract costs less the portion of such costs allocated to delivered units. The costs attributed to units delivered are based on the estimated average cost of all units expected to be produced on a contract-by-contract basis.

Changes in the price of rare earth and other materials can have a significant impact on inventory valuation. We evaluate the need for a lower of cost or market (“LCM”) adjustment to inventories based on the selling prices of our finished products generally at the end of the period. To the extent raw material prices increase subsequent to the balance sheet date, we consider these price movements in our LCM evaluation. Declines in the selling prices of our finished goods, which can result from decreases in the market price of raw materials or other factors, can result in our inventory carrying value being written down to a lower market value.

Property, Plant and Equipment - Property, plant and equipment is recorded at historical cost less accumulated depreciation. Depreciation of plant and equipment, including assets recorded under capital leases, is provided by the straight-line method over the useful lives of 5 to 25 years for land improvements, 5 to 40 years for buildings and improvements, 5 to 15 years for machinery and equipment (with the majority in the range of 5 to 10 years), 5 to 10 years for furniture and fixtures and 3 to 5 years for vehicles and computers and related equipment. Leasehold improvements are depreciated over the shorter of the estimated useful life or the term of the lease.

Long-lived Assets other than Goodwill - Long-lived assets are reviewed for impairment whenever events or changes in circumstances indicate the carrying amount may not be recoverable. Events or circumstances that would result in an impairment review primarily include operating losses, a significant change in the use of an asset, or the planned disposal or sale of the asset. The asset would be considered impaired when the future net undiscounted cash flows generated by the asset are less than its carrying value. An impairment loss would be recognized based on the amount by which the carrying value of the asset exceeds its estimated fair value.

Goodwill and Intangible Assets - We evaluate the carrying value of goodwill and indefinite-lived intangible assets for impairment annually as of October 1 and between annual evaluations if changes in circumstances or the occurrence of certain events indicate potential impairment. If the carrying value of goodwill or an indefinite-lived intangible asset exceeds its fair value, an impairment loss is recognized.

Intangible assets consist of (i) definite-lived assets subject to amortization and (ii) indefinite-lived intangible assets not subject to amortization. Definite-lived intangible assets consist principally of customer relationships, developed technology, know-how, capitalized software and license agreements and are being amortized using the straight-line or other appropriate method, if applicable. Indefinite-lived intangible assets consist of tradenames.

Retained Liabilities of Businesses Sold - Retained liabilities of businesses sold include obligations related to our former Precious Metals Group (“PMG”), which was sold in 2003. Under terms of the sale agreement, we will reimburse the buyer of this business for certain items that become due and payable by the buyer subsequent to the sale date. Such items are principally comprised of taxes payable related to periods during which we owned PMG. The liability was $11.3 million and $12.3 million as of December 31, 2014 and 2013, respectively. Corresponding receivables related to the indemnification of the liabilities of $8.2 million and $9.1 million at December 31, 2014 and 2013, respectively, were recorded in Other non-current assets.

Revenue Recognition — Except for revenue recognized under the percentage of completion method of accounting in Battery Technologies (see discussion below), we recognize revenue when persuasive evidence of an arrangement exists, unaffiliated customers take title and assume risk of loss, the sales price is fixed or determinable and collection of the related receivable is reasonably assured. Revenue recognition generally occurs upon shipment of product or usage of inventory consigned to customers. All amounts in a sales transaction billed to a customer related to shipping and handling are reported as sales.

The Battery Technologies segment uses the percentage of completion method to recognize most of its revenue. Most defense contracts use the units-of-delivery method while most space contracts use the cost-to-cost method as the basis to measure progress toward completing a contract. Under the units-of-delivery method, revenues are recognized based on the contract price of units delivered. Under the cost-to-cost method, revenue is recognized based on the ratio of cost incurred compared to management's estimate of total costs expected to be incurred under the contract. The percentage of completion method requires substantial judgment on the part of management due to the duration of the contracts as well as the technical nature of the products involved. Contract revenues and cost estimates are reviewed at least quarterly and adjustments are reflected in the accounting period such amounts are determined. Billings in excess of amounts earned are deferred. Anticipated losses on contracts are recorded in full in the period in which the loss becomes evident.

Cost of Goods Sold — Cost of goods sold is comprised of raw material costs, direct production, maintenance and utility costs, depreciation, other overhead costs and shipping and handling costs.

Research and Development — Research and development costs are charged to expense when incurred, are included in selling, general and administrative expenses and amounted to $26.0 million, $26.3 million and $32.2 million in 2014, 2013 and 2012, respectively. These amounts do not include development and application engineering costs incurred in conjunction with fulfilling customer orders and executing projects.

Accounting for Operating Leases — Lease expense is recorded on a straight-line basis. The noncancellable lease term used to calculate the amount of the straight-line expense is generally determined to be the initial lease term, including any optional renewal terms that are reasonably assured. Certain leases include escalating rent provisions and lease incentives which are recognized as lease expense on a straight-line basis over the lease term. Lease payments that depend on an existing index or rate are included in our minimum lease payments that are recognized as lease expense on a straight-line basis over the minimum lease term.

Income Taxes — Deferred income taxes are provided to recognize the effect of temporary differences between financial and tax reporting. Deferred income taxes are not provided for undistributed earnings of foreign consolidated subsidiaries, to the extent such earnings are determined to be reinvested for an indefinite period of time.

Foreign Currency Translation — The functional currency for most of our operating subsidiaries outside of the United States is the applicable local currency. For those operations, assets and liabilities are translated into U.S. dollars at period-ending exchange rates and revenues and expenses are translated into U.S. dollars using average exchange rates. The resulting translation adjustments are recorded as a component of Accumulated other comprehensive income (loss) in stockholders’ equity. Accordingly, foreign currency exchange gains and losses related to assets, liabilities and transactions denominated in other currencies (principally the Euro) are included in the Statements of Consolidated Operations.

Derivative Instruments — We enter into derivative instruments and hedging activities to manage, where possible and economically efficient, commodity price risk, foreign currency exchange rate risk and interest rate risk related to borrowings. It is our policy to execute such instruments with creditworthy banks and not enter into derivative instruments for speculative purposes. All derivatives are reflected at their fair value and recorded in other current assets and other current liabilities as of December 31, 2013. There were no outstanding derivatives as of December 31, 2014. The accounting for the fair value of a derivative depends upon whether it has been designated as a hedge and on the type of hedging relationship. To qualify for designation in a hedging relationship, specific criteria must be met and appropriate documentation prepared. Changes in the fair values of derivatives not designated in a hedging relationship are recognized in earnings.

From time to time we employ derivative instruments in connection with purchases and sales of inventory in order to establish a fixed margin and mitigate the risk of price volatility. Some customers request fixed pricing and we may use a derivative to mitigate price risk. While this hedging may limit our ability to participate in gains from favorable commodity price fluctuations, it eliminates the risk of loss from adverse commodity price fluctuations.

Periodically, we enter into certain derivative instruments designated as cash flow hedges. For these hedges, the effective portion of the gain or loss from the financial instrument is initially reported as a component of Accumulated other comprehensive income (loss) in stockholders’ equity and subsequently reclassified into earnings in the same line as the hedged item in the same period or periods during which the hedged item affects earnings.

Note 2 — Recently Issued Accounting Guidance

In May 2014, the FASB issued ASU No. 2014-09, “Revenue from Contracts with Customers (Topic 606)” (“ASU 2014-09”). The update amends the guidance for revenue recognition to replace numerous, industry-specific requirements and converges areas under this topic with those of the International Financial Reporting Standards. The amendments are effective for reporting periods beginning after December 15, 2016, and early adoption is prohibited. Entities can transition to the standard either retrospectively or as a cumulative-effect adjustment as of the date of adoption. We are currently assessing the impact the adoption of ASU 2014-09 may have on our results of operations or financial position.

In July 2013, the FASB issued ASU 2013-11 Presentation of Unrecognized Tax Benefit When a Net Operating Loss Carryforward, a Similar Tax Loss, or a Tax Credit Carryforward exists. The update requires companies to offset a liability recorded for an unrecognized tax benefit against a related deferred tax asset of a net operating loss carryforward, a similar tax loss or a tax credit carryforward if such settlement is required or expected in the event the uncertain tax position is disallowed. The amendments are effective for fiscal years, and interim periods within those years, beginning after December 15, 2013. We adopted this guidance as of March 31, 2014 and reclassified a portion of our uncertain tax position accrual to net against the related deferred tax assets. Such adoption did not have an effect on our results of operations or financial position.

Note 3 — Inventories

Inventories consist of the following as of December 31,

	2014		2013
Raw materials and supplies	$	73.6	$	83.3
Work-in-process	118.1		122.2
Finished goods	36.7		35.4
	$	228.4	$	240.9

Note 4 — Property, Plant and Equipment, net

Property, plant and equipment, net consists of the following as of December 31,

	2014			2013
Land and improvements	$	37.6		$	39.6
Buildings and improvements	138.0			145.8
Machinery and equipment	346.4			350.4
Furniture and fixtures	8.2			7.6
Property, plant and equipment, at cost	530.2			543.4
Less accumulated depreciation	(221.9		)	(197.8		)
	$	308.3		$	345.6

Total depreciation expense on property, plant and equipment was $42.5 million in 2014, $47.7 million in 2013 and $58.7 million in 2012.

Note 5 — Acquisitions and Divestitures

(a) Acquisitions

Yardney

On November 24, 2014. we completed the acquisition of Ener-Tek International, Inc., which operates under the brand name Yardney Technical Products ("Yardney"). Based in East Greenwich, Rhode Island, Yardney is a designer, developer and manufacturer of high-performance lithium-ion and silver-zinc cells and batteries for niche applications in the defense and aerospace markets. We funded the $24.6 million acquisition price through existing cash balances. The balance sheet as the acquisition date is based on preliminary estimated purchase accounting. The purchase price was allocated to $10.1 million of net assets, including $5.5 million of identifiable intangibles. The remaining $14.5 million was recorded as goodwill, which is not expected to be deductible for tax purposes.

VAC

Our Magnetic Technologies segment consists of VAC Holding GmbH ("VAC"), which we acquired in 2011. The total purchase price of $812.2 million included cash consideration of $686.2 million, withheld consideration of $86.3 million, and the issuance of Company shares valued at $39.7 million. The withheld consideration relates to potential indemnification claims made by OM Group and accepted by the seller, if any, within two years of the closing date of the acquisition with certain exceptions related to tax matters. In August 2013 we remitted a payment of $23.0 million to the seller of VAC. In December 2014, we remitted a payment of $16.2 million to the seller of VAC and charged certain tax assessments related to pre-acquisition tax years of $1.6 million against the outstanding withholding liability.

31

We now expect matters relating to the withheld consideration to be resolved in 2015. Due to the length of time over which these payments are being made, these payments are classified as financing activities within the Statement of Consolidated Cash Flows. The 2013 payment was previously classified in investing activities, and we have now correctly classified this payment in financing activities.

We are engaged in arbitration with the seller regarding the remainder of the withheld consideration which covers unresolved claims.

(b) Divestitures

Advanced Materials

On March 29, 2013, we completed the divestiture of our cobalt-based business. The transaction comprised the sale of the downstream portion of the business (including our cobalt refinery assets in Kokkola, Finland), and the transfer of equity interests in the DRC-based joint venture, known as GTL, to the joint venture partners, subject to a security interest in our favor with respect to the joint venture's performance related to certain supply arrangements.

In connection with this transaction we received cash proceeds of $328.7 million. At closing, net proceeds of $302.1 million were received, and we received additional proceeds of $26.6 million as an adjustment to the purchase price based on a post-closing analysis of the closing balance sheet in July 2013. Including the adjustment to the purchase price, a loss of $111.6 million was recorded on the divestiture in 2013, which included a $10.3 million write-off of deferred financing fees related to the required debt pre-payment, a reserve for a note receivable from joint venture partner of $16.0 million and transaction expenses of $9.0 million.

The sale agreement for the downstream portion of the business also provides for potential future additional cash consideration of up to $110.0 million based on the business achieving certain revenue targets over a period of three years. Using our projected trends of cobalt prices and volumes, it is not probable that the business will meet the revenue targets, and no value was assigned to the potential future cash consideration while calculating the loss on the divestiture or at December 31, 2013 and 2014.

Following the sale, to assist in the transition of the downstream business, we entered into two agreements with the buyer pursuant to which: (1) We act as intermediary in a supply agreement between GTL and the buyer, in back-to-back arrangements for a period of at least two years. We met the cobalt feed supply target under that agreement in October 2014 and the supply agreement will terminate in March 2015. (2) We also served as the U.S. distributor for refined cobalt products in primarily back-to-back arrangements until December 31, 2013.

Ultra Pure Chemicals

On May 31, 2013, we completed the sale of our Ultra Pure Chemicals (UPC) business. In connection with this transaction we received cash proceeds of $63.3 million, which included an estimated $3.0 million for excess working capital. A loss of $9.8 million, net of tax, was recorded on the divestiture, which included a gain of $1.5 million on the sale of net assets offset by the realization of a loss in accumulated other comprehensive income of $8.8 million, a $1.5 million write-off of deferred financing fees related to the required debt pre-payment and transaction expenses of $1.0 million. In the second quarter 2014, we settled the outstanding working capital items and recorded an additional loss of $0.2 million.

The results of our UPC business are reported in discontinued operations in the accompanying consolidated financial statements and notes to the consolidated financial statements for all periods prior to the UPC sale.  As required, annual interest expense of $1.0 million and $2.5 million for the periods ending December 31, 2013 and 2012, respectively, related to the debt repaid with the proceeds from the sale of the business was allocated to discontinued operations for all periods prior to the UPC sale. A summary of our discontinued operations activity is as follows:

32

	Twelve Months Ended December 31
(In millions except per share data)		2014			2013			2012
Net Sales		$	—		$	38.3		$	93.4
Loss from operations of divested business (net of tax)		$	(0.1	)	$	(2.5	)	$	(0.4	)
Loss on disposal of business (net of tax)		(0.2		)	(9.8		)	—
Loss from discontinued operations (net of tax)		$	(0.3	)	$	(12.3	)	$	(0.4	)
Loss per share from discontinued operations (net of tax)
Basic and diluted		$	(0.01	)	$	(0.39	)	$	(0.01	)

Note 6 — Goodwill and Other Intangible Assets

Goodwill is tested for our reporting units on an annual basis, or more frequently as impairment indicators arise. We have the option to perform a qualitative evaluation about the likelihood of goodwill and indefinite lived intangible impairment to determine whether we should quantitatively calculate the fair value of each of our reporting units. If, after considering all events and circumstances that support a qualitative evaluation, we determine that it is not more-likely-than-not that the fair value of our reporting units is less than the respective carrying value, then performing the two-step quantitative approach would be considered unnecessary. Conversely, if applying the qualitative evaluation indicates that it is more-likely-than-not that the fair value is less than the carrying value, then we would proceed with the first step of the two-step quantitative approach and continue with the quantitative analysis to determine if in fact the reporting unit or units' carrying value exceeds its fair value.

We estimate the fair value of a reporting unit (including goodwill) and compare that amount to the carrying value of that reporting unit. If the estimated fair value of the reporting unit is less than its carrying value, a second step would be undertaken to determine the implied fair value of goodwill of the reporting unit, which is then compared with the carrying value of the goodwill of the reporting unit. This second step would include valuing all of the tangible and intangible assets and liabilities of the reporting unit as if they had been acquired in a business combination on the testing date. We have developed a model to estimate the fair value of the reporting units utilizing a discounted cash flow valuation technique (“DCF model”). We selected the DCF model as we believe it is comparable to what would be used by market participants to estimate fair value of our reporting units. The DCF model incorporates our estimates of future cash flows; future growth rates; terminal value amounts; allocations of certain assets, liabilities and cash flows among reporting units; and the applicable weighted-average cost of capital (the “WACC”) used to discount those estimated cash flows. These estimates require significant judgment and are consistent with our forecast and long-range plans and are considered level 3 inputs under the fair value hierarchy.

We conduct our annual goodwill impairment test as of October 1. The results of testing as of October 1, 2014 for all reporting units except Magnetic Technologies confirmed that the estimated fair value of each of the reporting units substantially exceeded its carrying value and no impairment loss was required to be recognized. During a strategic evaluation by the management team, led by the new business leader, of the business and of various opportunities to optimize performance, we noted indicators of potential impairment in the Magnetic Technologies business, including deteriorating European macroeconomic conditions and increasing competition. The resulting test confirmed that the carrying value of the Magnetic Technologies business exceeded its fair value for goodwill. In the fourth quarter of 2014, we performed the second step as discussed above and a non-cash goodwill impairment charge of $168.7 million was recognized.

The results of testing as of October 1, 2013 and 2012 for all reporting units except Magnetic Technologies in 2012 confirmed that the estimated fair value of each of the reporting units substantially exceeded its carrying value and no impairment loss was required to be recognized. The October 1, 2012 estimated fair value of the Magnetic Technologies reporting unit exceeded its carrying value by 4%.

We believe the assumptions used in our impairment testing were consistent with the risk inherent in the business models of the reporting unit at the time the impairment test was performed. Although we believe the forecasts, assumptions, judgments and estimates used are reasonable and appropriate, different forecasts, assumptions, judgments and estimates could materially affect the goodwill test and, potentially, our results of operations and financial position. The change in the carrying amount of goodwill is as follows:

33

	Magnetic Technologies			Advanced Materials			Specialty Chemicals			Battery Technologies			Continuing Operations			Discontinued Operations			Consolidated
Balance at January 1, 2013	$	205.2		$	103.3		$	154.4		$	65.4		$	528.4		$	15.0		$	543.4
Divestitures and adjustments	—			(103.3		)	—			—			(103.3		)	(15.0		)	(118.3		)
Foreign currency translation adjustments	9.3			—			(1.3		)	(0.3		)	7.7			—			7.7
Balance at December 31, 2013	214.5			—			153.1			65.1			432.7			—			432.7
Impairment	(168.7		)	—			—			—			(168.7		)	—			(168.7		)
Acquisition	—			—			—			14.5			14.5			—			14.5
Foreign currency translation adjustments	(19.3		)	—			(6.3		)	(0.3		)	(25.9		)	—			(25.9		)
Balance at December 31, 2014	$	26.5		$	—		$	146.8		$	79.3		$	252.6		$	—		$	252.6

Intangible assets consist of (i) definite-lived assets subject to amortization and (ii) indefinite-lived intangible assets not subject to amortization. All intangible assets subject to amortization are amortized on a straight-line basis over the estimated useful lives or other appropriate methods if applicable. During a strategic evaluation by the management team we noted indicators of potential impairment at the Magnetic Technologies business as discussed above. In the fourth quarter of 2014, we performed the DCF calculation based on relief of royalty method and determined that the fair value for the Magnetic Technologies tradename was less than the carrying value and a non-cash impairment charge of $26.7 million was recognized.

A summary of intangible assets follows:

	2014										2013
	Carrying Value		Accumulated Amortization (a)			Impairment			Net		Carrying Value		Accumulated Amortization (a)			Net
Tradenames	$	114.1	$	(9.6	)	$	(26.7	)	$	77.8	$	117.0	$	(2.9	)	$	114.1
Customer relationships	218.2		(90.1		)	—			128.1		234.5		(82.4		)	152.1
Developed technology	135.5		(36.1		)	—			99.4		136.5		(19.9		)	116.6
Know-how	20.1		(4.6		)	—			15.5		18.6		(3.6		)	15.0
Capitalized software	22.3		(18.6		)	—			3.7		22.0		(17.4		)	4.6
Other intangibles	2.9		(2.6		)	—			0.3		4.2		(3.6		)	0.6
Total	$	513.1	$	(161.6	)	$	(26.7	)	$	324.8	$	532.8	$	(129.8	)	$	403.0

(a) - Actual amounts of amortization expense may differ from the estimated amounts due to changes in foreign currency exchange rates, impairment of intangible assets, intangible assets additions, accelerated amortization of intangible assets, acquisitions and divestitures and other factors.

The weighted average amortization period is 10 years for customer relationships, 12 years for developed technology, 16 years for know-how and 3 year for capitalized software. Indefinite-lived intangible assets are tested for impairment annually and between annual evaluations if changes in circumstances or the occurrence of certain events indicate potential impairment.

Amortization expense related to intangible assets for the years ended December 31, 2014, 2013 and 2012 was $25.0 million, $26.1 million and $25.5 million, respectively. In 2013 we divested the UPC business which had intangible assets with a carrying value of $17.2 million.

We estimate that the annual pre-tax amortization expense will be approximately $25.2 million for 2015, $24.9 million for 2016, $24.8 million for 2017, $20.7 million for 2018 and $21.1 million for 2019.

The goodwill and intangible asset impairment led to an impairment review of the Magnetic Technologies long-lived assets other than goodwill and indefinite lived intangibles. The future net undiscounted cash flows generated by the assets were greater than the carrying value, indicating no impairment of long-lived assets.

Note 7 — Debt

34

On September 4, 2013 we entered into a new five-year Senior Secured Revolving Credit Facility (“the Facility”), and terminated our previous credit facility dated August 2, 2011 that was scheduled to expire in August 2016. The Facility provides for $350 million of revolving borrowing capacity and includes an expansion option of up to an additional $150 million, subject to certain conditions. The borrowers under the agreement are the Company, Harko C.V. (“Harko”), a limited partnership organized under the laws of the Netherlands, and VAC Germany GmbH (“VAC”), a limited liability company under the laws of Germany. Harko and VAC are wholly-owned subsidiaries of the Company. The Facility matures on September 4, 2018.

In the first six months of 2013 we repaid the Term A and Term B loans under the previous credit facility with the proceeds from the divestitures of the Advanced Materials and UPC businesses, as required, and cash on hand. Related to these required pre-payments, we included the write-off of $10.3 million and $1.5 million of deferred financing fees in the losses on divestitures of the Advanced Materials and UPC businesses, respectively.

The obligations of the Company under the Facility are guaranteed by certain of the Company’s material U.S. subsidiaries. The obligations of Harko and VAC under the Facility are guaranteed by the Company and certain of the Company’s material subsidiaries, subject to certain exceptions including financial assistance limitations in certain foreign jurisdictions. In addition, the obligations of the Company under the Facility are secured by a first priority security interest in substantially all of the existing and future personal property of the Company and certain of the Company’s material U.S. subsidiaries, including 65% of the voting capital stock of certain of the Company’s direct foreign subsidiaries. The obligations of Harko and VAC under the Facility are secured by a first priority security interest in certain of the existing and future personal property of Harko, VAC and certain of the Company’s subsidiaries and a 100% pledge of the voting capital stock of certain of the Company’s subsidiaries, subject to certain exceptions, including financial assistance limitations in certain foreign jurisdictions.

The interest rates applicable to loans under the Facility will be at our option and equal to either a base rate or a LIBOR rate, in each case plus an applicable margin percentage. The base rate will be the highest of (i) the federal funds rate plus 0.50%, (ii) the prime rate or (iii) the LIBOR rate with a maturity of one month plus 1.00%. The applicable margin percentage is based on the leverage ratio of the Company. The range of the applicable margin percentage is 1.125% to 2.000% in the case of LIBOR advances and 0.125% to 1.000% in the case of base rate advances.

The Facility contains customary representations and warranties and certain covenants that limit the ability of the Company and its restricted subsidiaries to, among other things: (i) incur or guarantee additional indebtedness; (ii) redeem, repurchase or pay distributions on capital stock or redeem or repurchase subordinated debt; (iii) make investments; (iv) sell assets; (v) enter into agreements that restrict distributions or other payments from restricted subsidiaries to the Company; (vi) incur or suffer to exist liens securing indebtedness; (vii) consolidate, merge or transfer all or substantially all of their assets; and (viii) engage in transactions with affiliates. In addition, the Facility contains financial covenants that limit capital expenditures in any fiscal year and that measure (i) the ratio of the Company’s total funded indebtedness net of certain cash to the amount of the Company’s consolidated EBITDA and (ii) the ratio of the amount of the Company’s consolidated EBITDA to the Company’s cash interest expense, as defined in the agreement.

As of December 31, 2014, we had $12.5 million outstanding under the Facility which was repaid with available cash in January 2015. We are in compliance with all Facility covenants.

Interest paid on long-term debt was $0.0 million, $6.9 million and $38.4 million in 2014, 2013 and 2012, respectively. As required, interest expense of $1.0 million and $2.5 million has been allocated to discontinued operations for 2013 and 2012, respectively. No interest was capitalized in 2014, 2013 or 2012.

Note 8 — Derivative Instruments

All derivatives are reflected on the balance sheet at fair value and recorded in other current assets and other current liabilities in the Consolidated Balance Sheets. The accounting for the fair value of a derivative depends upon whether it has been designated as a hedge and on the type of hedging relationship. Changes in the fair value of derivative instruments are recognized immediately in earnings, unless the derivative is designated as a hedge and qualifies for hedge accounting. Under hedge accounting, recognition of derivative gains and losses can be matched in the same period with that of the hedged exposure and thereby minimize earnings volatility.

For a fair value hedge, the change in fair value of the hedging instrument and the change in fair value of the hedged item attributable to the risk being hedged are both recognized currently in earnings. For a cash flow hedge, the effective portion of the change in fair value of a hedging instrument is initially recognized in Accumulated other comprehensive income (loss) (“AOCI(L)”) in stockholders’ equity and subsequently reclassified to earnings when the hedged item affects income. Any ineffective portion of the change in fair value of a cash flow hedge is recognized immediately in earnings.

Commodity Price Risk

From time to time we employ derivative instruments in connection with certain purchases of certain commodities in order to establish a fixed margin and mitigate the risk of price volatility. This hedging limits our ability to participate in gains from favorable commodity price fluctuations and it limits the risk of loss from adverse commodity price fluctuations.

Derivative instruments employed to manage commodity price risk include some contracts designated as cash flow hedges as well as some other contracts that are not designated as hedges for accounting purposes.

In May 2013, we entered into nickel forward derivative contracts to establish a fixed margin and mitigate the risk of price volatility related to certain sales expected in 2013 and 2014 of nickel-containing finished products that were priced on a formula that included a fixed nickel price component. These forward derivative contracts were designated

as cash flow hedges for accounting purposes and were settled during the second quarter 2014. In October 2012, we entered into nickel forward derivative contracts to establish a fixed margin and mitigate the risk of price volatility related to certain sales expected in 2013 of nickel-containing finished products that were priced based on a formula that included a fixed nickel price component and were settled in 2013. These forward derivative contracts have been designated as cash flow hedges for accounting purposes.

Foreign Currency Exchange Rate Risk

Our primary Finnish operating subsidiary was included in the divestiture of our cobalt-based business on March 29, 2013. The functional currency for this subsidiary was the U.S. dollar since a majority of its purchases and sales were denominated in U.S. dollars. While a majority of the subsidiary’s raw material purchases were in U.S. dollars, it had some Euro-denominated operating expenses. From time to time, we entered into foreign currency forward contracts to mitigate a portion of the earnings volatility in those Euro-denominated cash flows due to changes in the Euro/U.S. dollar exchange rate. As of December 31, 2014, 2013, and 2012 we had no Euro forward contracts outstanding. In 2012 we reclassified the previous cumulative loss from the 2011 contracts into earnings. We designated these foreign currency derivatives as cash flow hedges of the subsidiary's forecasted Euro-denominated expenses.

Interest Rate Risk

From time to time we utilized interest rate swap agreements to partially reduce risks related to variable rate financing agreements that are subject to changes in the market rate of interest.

We had interest rate swaps with notional values that totaled $114.5 million at December 31, 2012 and AOCI(L) included a cumulative loss of $0.1 million related to these contracts. Following the full repayment of the Term B facility at the end of March 2013, we elected in April 2013 to terminate all the remaining interest swaps contracts. The AOCI at the time of the termination represented an immaterial cumulative loss related to these contracts which was reclassified to earnings in the second quarter 2013.

There was no hedge ineffectiveness in 2014, 2013 or 2012 for hedges.

There were no outstanding hedge contracts in the Consolidated Balance Sheet as of December 31, 2014.

The following table summarizes the effect of derivative instruments as recorded in the Statement of Consolidated Operations:

Derivatives in Cash Flow Hedging Relationships
	Amount of Gain (Loss) on Derivative Recognized in AOCI(L) (Effective Portion) for the Year Ended December 31,
	2014		2013			2012
Euro forward contracts	$	—	$	—		$	6.0
Commodity contracts	—		(0.3		)	—
Interest rate swap agreements	—		—			(0.1		)
Total	$	—	$	(0.3	)	$	5.9

	Location of Gain (Loss) Reclassified from AOCI(L) into Income	Amount of Gain (Loss) Reclassified from AOCI(L) into Income (Effective Portion) for the Year Ended December 31,
	(Effective Portion)	2014			2013			2012
Euro forward contracts	Cost of goods sold	$	—		$	—		$	2.3
Commodity contracts	Cost of goods sold	(0.2		)	(0.2		)	—
Interest rate swap agreements	Interest expense	—			—			(0.4		)
Total		$	(0.2	)	$	(0.2	)	$	1.9

Note 9 — Fair Value Disclosures

The following table shows the Company’s assets and liabilities accounted for at fair value on a recurring basis:

			Fair Value Measurements at Reporting Date Using
			Quoted Prices in Active Markets for Identical Assets	Significant Other Observable Inputs	Significant Unobservable Inputs
Description	December 31, 2014		(Level 1)	(Level 2)	(Level 3)
Liabilities:
Contingent consideration payable	$	1.4	—	—	1.4

The fair value of the derivative instruments have been determined based on the market equivalents at the balance sheet date, taking into account current commodity forward rates, therefore, they are classified within Level 2 of the valuation hierarchy. Our valuation techniques and Level 3 inputs used to estimate the fair value of the contingent consideration payable in connection with our acquisition of Rahu Catalytics Limited ("Rahu") are described below. There were no transfers into or out of Levels 1, 2 or 3 in 2014 or 2013.

The following table summarizes changes in Level 3 liabilities measure at fair value on a recurring basis:

	Contingent Consideration
Fair Value at December 31, 2013	$	1.4
Accretion expense	0.2
Foreign exchange	(0.2		)
Fair Value at December 31, 2014	$	1.4

We acquired Rahu on December 22, 2011. The purchase price included contingent consideration of up to an additional €20.0 million ($24.3 million at December 31, 2014) based on achieving certain volume targets over a fifteen year period ending on December 31, 2026. We estimated the fair value of the contingent consideration liability using probability-weighted expected future cash flows and applied a discount rate that appropriately captured a market participant's view of the risk associated with the liability. The liability for contingent consideration is included in Other non-current liabilities in the Consolidated Balance Sheet. The valuation of contingent consideration is classified utilizing Level 3 inputs consistent with reasonably available assumptions which would be made by other market participants. There are many factors that could impact the likelihood that we will pay the contingent consideration, and therefore, affect its value. Such factors include the overall economic conditions and our ability to drive sales volumes as planned. Subsequent to the date of acquisition the estimated fair value of the contingent consideration was reduced to €1.0 million ($1.4 million)after an evaluation of new information available in the fourth quarter of 2013. The change was reflected within Other income in the 2013 Consolidated Statement of Operations. A change in a market participant view of risks could also impact the value of the contingent consideration.

We also hold financial instruments consisting of cash, accounts receivable, and accounts payable. The carrying amounts of cash, accounts receivable and accounts payable approximate fair value due to the short-term maturities of these instruments. Revolver debt had a carrying value of $12.5 million at December 31, 2014 and is the approximate fair value due to the the short-term nature of the instrument. There was no long-term debt outstanding as of December 31, 2014 or 2013. Derivative instruments are recorded at fair value as indicated above.

We utilize a “relief from royalty” methodology in estimating fair values for indefinite-lived tradenames. The methodology estimates the fair value of each trade name by determining the present value of the royalty payments that are avoided as a result of owning the tradename and includes judgmental assumptions about sales growth that are consistent with the assumptions used to determine the fair value of reporting units in our goodwill testing. The fair value measurements were calculated using unobservable inputs, classified as Level 3, requiring significant management judgment due to the absence of quoted market prices or observable inputs for assets of a similar nature.

Accounts receivable potentially subjects us to a concentration of credit risk. We maintain significant accounts receivable balances with several large customers. At December 31, 2014 and 2013 the accounts receivable balance from our largest customer represented 2% of the Company’s net accounts receivable, respectively. Generally, we do not obtain security from our customers in support of accounts receivable.

Sales to the top three customers in the Battery Technologies segment represented approximately 49%, 48% and 52% of Battery Technologies’ net sales in 2014, 2013 and 2012, respectively. The loss of one or more of these customers could have a material adverse effect on Battery Technologies’ business, results of operations or financial position.

Note 10 — Income Taxes

Loss from continuing operations before income tax expense consists of the following:

	Year Ended December 31
	2014			2013			2012
United States	$	(9.0	)	$	(13.6	)	$	(12.3	)
Outside the United States	(163.8		)	(49.2		)	(36.3		)
	$	(172.8	)	$	(62.8	)	$	(48.6	)

Income tax (benefit) expense is summarized as follows:

	Year Ended December 31
	2014			2013			2012
Current tax provision (benefit):
United States:
Federal	$	1.4		$	0.6		$	(3.1	)
State and local	0.2			—			—
Outside the United States	15.1			17.4			30.1
Total current	16.7			18.0			27.0
Deferred tax provision (benefit):
United States	(1.4		)	0.6			2.4
Outside the United States	(15.8		)	(7.9		)	(32.6		)
Total deferred	(17.2		)	(7.3		)	(30.2		)
	$	(0.5	)	$	10.7		$	(3.2	)

A reconciliation of income taxes computed using the United States statutory rate to income taxes computed using our effective income tax rate is as follows:

	Year Ended December 31
	2014			2013			2012
Loss from continuing operations before income tax expense	$	(172.8	)	$	(62.8	)	$	(48.6	)
Income taxes at the United States statutory rate (35)%	(60.5		)	(21.9		)	(17.1		)
Increase (decrease) in taxes resulting from:
Effective tax rate differential on income outside of the United States	—			19.3			(3.3		)
Repatriation of foreign earnings	2.3			(1.7		)	7.4
Goodwill impairment	52.1			—			—
Valuation allowance	6.7			13.2			3.7
Uncertain tax positions	(1.1		)	0.1			(1.9		)
Allowance on GTL prepaid tax asset	—			0.4			5.6
Other, net	—			1.3			2.4
Income tax expense (benefit)	$	(0.5	)	$	10.7		$	(3.2	)
Effective income tax rate	(a)			(a)			6.5		%

(a) not meaningful

The effective income tax rate for the year ended December 31, 2014 is impacted by the VAC intangible asset impairment charges of $195.4 million and other cost reduction charges (see Note 6 for further discussion on the intangible asset impairment charges). There is no tax benefit for the $168.7 million goodwill portion of the impairment charges due to its permanent nature.

Excluding the impact of the VAC goodwill and intangible asset impairment charges of $195.4 million and other business improvement and cost reduction charges of $10.0 million, the effective tax rate for the year ended December 31, 2014 would have been 27.4%. This rate is lower than the U.S. statutory tax rate primarily due to income earned in tax jurisdictions with lower statutory rates than the U.S., and our financing structure, partially offset by losses and carry-forwards in certain jurisdictions (including the U.S. and Germany) with no corresponding tax benefit.

The effective income tax rate for the year ended December 31, 2013 is impacted by the loss of $111.6 million related to the divestiture of the Advanced Materials business. There was no tax benefit on the loss on divestiture of the Advanced Materials business due to our legal entity and tax structure.

Excluding the impact of loss on sale of advanced materials business of $111.6 million, the effective tax rate for the year ended December 31, 2013 would have been 22.1%. This rate is lower than the U.S. statutory tax rate primarily due to income earned in tax jurisdictions with lower statutory rates than the U.S., and our financing structure, partially offset by losses and carry-forwards in certain jurisdictions (including the U.S. and Germany) with no corresponding tax benefit.

The effective income tax rate for the year ended December 31, 2012 was impacted by VAC purchase accounting related inventory charges of $55.9 million and GTL. During 2012, we recorded a tax expense of $10.4 million related to GTL. This includes a $5.6 million tax expense related to GTL prepaid tax asset impairment and $6.6 million related to other GTL permanent differences, of which our share was 55%, or $6.7 million.

Excluding the impact of VAC purchase accounting related inventory charges and GTL discrete and permanent items, the effective tax rate for the year ended December 31, 2012 would have been 31.8%. This rate is lower than the U.S. statutory tax rate primarily due to income earned in tax jurisdictions with lower statutory rates than the U.S., and our internal financing structure, partially offset by losses and carry-forwards in certain jurisdictions (including the U.S. and Germany) with no corresponding tax benefit.

During fourth quarter of 2012, the Company received a $37.9 million income tax refund which was included in the Refundable, prepaid and accrued income taxes in the Statement of Consolidated Cash Flows for December 31, 2012.

We intend to repatriate only future earnings and therefore have not provided additional United States income taxes on approximately $402 million of undistributed earnings of consolidated foreign subsidiaries. Such earnings could become taxable upon the sale or liquidation of these foreign subsidiaries or upon dividend repatriation. Our intent is for such earnings to be permanently reinvested by the foreign subsidiaries. It is not practicable to estimate the amount of unrecognized withholding taxes and tax liability on such earnings.

We file income tax returns in the U.S. federal jurisdiction, and various state and foreign jurisdictions. Our major tax jurisdictions include the U.S. and Germany. With few exceptions, we are no longer subject to U.S. federal, state and local, or non-U.S. income tax examinations by tax authorities for years before 2006. The Internal Revenue Service completed the examination of our 2010 U.S. federal income tax return, and Finnish tax authorities completed the examination of our Finnish tax returns for the years 2007-2011.  VAC's German tax returns have been audited through 2005. We are indemnified, subject to certain limitations, for any pre-acquisition income tax liabilities of VAC. German tax authorities are currently examining VAC's income tax returns for the years 2006-2011.

Income tax payments were $18.8 million, $47.2 million and $33.9 million in 2014, 2013 and 2012, respectively.

Significant components of our deferred income taxes are as follows:

	December 31
	2014			2013
Employee benefit accruals	$	58.6		$	44.7
Foreign operating loss carryforwards	6.5			8.3
Foreign tax credit carryforwards	17.3			23.1
State operating loss carryforwards	7.8			7.6
Operating accruals	48.4			42.3
Investment credit carryforwards	2.6			3.3
Valuation allowance	(91.9		)	(83.6		)
Deferred tax assets	49.3			45.7
Depreciation	(31.2		)	(37.5		)
Amortization	(88.5		)	(107.7		)
Other	(0.2		)	(1.0		)
Deferred tax liabilities	(119.9		)	(146.2		)
Net deferred tax liabilities	$	(70.6	)	$	(100.5	)

Deferred income taxes are recorded in the Consolidated Balance Sheets in the following accounts:

	December 31
	2014			2013
Other current assets	$	2.1		$	2.4
Other non-current assets	5.3			6.4
Other current liabilities	(3.2		)	(6.8		)
Deferred income taxes — non-current liabilities	(74.8		)	(102.5		)
	$	(70.6	)	$	(100.5	)

We have a U.S. net deferred tax asset of $1.4 million which is expected to be recovered based on temporary differences that will reverse in 2015-2016. At December 31, 2014 and 2013, we had U.S state net operating loss carryforwards representing a potential future tax benefit of $7.8 million and $7.7 million, respectively. These carryforwards expire at various dates from 2015 through 2034. We have recorded a full valuation allowance against the U.S state net operating loss carryforwards. We have foreign net operating loss carryforwards of $30.6 million, representing a potential future tax benefit of $6.5 million in various jurisdictions, some of which expire in 2018 through 2033, and some of which have no expiration. We have established a $1.8 million valuation allowance against the foreign net operating loss carryforwards as we believe that some of these assets will more likely than not be realized. We have foreign investment tax credit and allowance carryforwards of $2.6 million, of which $1.9 million expire in 2028, while the remaining $0.7 million have no expiration. We have recorded a $1.9 million valuation allowance against the foreign investment tax credit and allowance carryforwards as we believe that a portion of these assets will not be realized.

For the year ended December 31, 2014, our valuation allowance increased primarily due to the increase in foreign carryforwards.

A reconciliation of the beginning and ending amount of uncertain tax positions is as follows:

Balance at January 1, 2013	$	18.0
Additions for tax positions related to the current year	0.6
Reductions for tax positions of prior years	(3.4		)
Foreign currency translation	0.3
Balance at December 31, 2013	15.5
Additions for tax positions related to the current year	0.4
Addition of receivable for prior year tax position	(0.7		)
Reductions for tax positions of prior years	(0.6		)
Reductions for lapses of statute of limitations	(0.1		)
Foreign currency translation	(0.8		)
Balance at December 31, 2014	$	13.7

With the exception of those relating to the VAC acquisition, all uncertain tax positions would affect the effective tax rate if recognized. However, $6.1 million of the uncertain tax positions could be offset by tax credit carryforwards, which, if recognized, would be offset by an adjustment to the deferred tax assets. The decrease in uncertain tax positions in 2014 primarily results from effective settlements during 2014 in various tax jurisdictions. The decrease in uncertain tax positions in 2013 primarily results from the effective settlements during 2013 in various tax jurisdictions and the transfer of our equity interests in GTL as part of the divestiture of the Advanced Materials business. At December 31, 2014, the liability for uncertain tax positions includes $5.9 million for which it is reasonably possible that the uncertain tax position will decrease within the next twelve months. These uncertain tax positions primarily relate to acquired businesses and may decrease upon effective settlement.

We recognize interest accrued related to uncertain tax positions and penalties as a component of income tax expense. During 2014 and 2013 we recognized an immaterial benefit related to interest and penalties. At December 31, 2014 and 2013, we had $0.6 million and $0.8 million, respectively, accrued for interest and penalties.

Note 11 — Pension and Other Post-Retirement Benefit Plans

We have defined contribution plans covering substantially all eligible U.S. employees. Contributions are directed by the employee into various investment options. These defined contribution plans do not have any direct ownership of the Company’s common stock. Under these plans, we match participants’ contributions based on plan provisions. Certain plans provide for a discretionary Company contribution based on employee compensation. We maintain additional defined contribution plans in certain locations outside the United States. Aggregate defined contribution plan expenses were $3.3 million, $4.7 million and $4.9 million in 2014, 2013 and 2012, respectively.

We have defined benefit pension obligations at VAC, substantially all of which are unfunded. VAC sponsors various defined benefits plans for its employees, including pension, early retirement benefits and anniversary benefits, mainly in Germany.

The EaglePicher Technologies ("EPT") pension plans consist of four, non-contributory, defined benefit pension plans. The Technologies Salaried Plan is a defined benefit, cash balance plan that covers EaglePicher Technologies salaried employees hired prior to January 1, 2007. The Technologies Hourly Plan is a defined benefit plan that covers EaglePicher Technologies non-union hourly employees hired prior to January 1, 2007 and union hourly employees hired prior to May 3, 2008. We also hold the liabilities of two frozen defined benefit pension plans. Pension benefits are paid to plan participants directly from pension plan assets. In 2014 we offered lump-sum payments to terminated vested participants in the EPT pension plans. $29.6 million was paid out of plan assets to participants who elected the lump sum payment, and we recorded a $3.2 million pre-tax pension settlement expense.

In addition to the pension liabilities for VAC and EPT, we have a non-contributory, defined benefit pension plan for certain retired employees in the United States related to a divested business. Pension benefits under this plan are paid to plan participants directly from pension plan assets.

Certain other non-U.S. employees are covered under other defined benefit plans. These other non-U.S. plans are not material.

We also have an obligation to our former chief executive officer in settlement of an unfunded supplemental executive retirement plan (“SERP”). Payments under the SERP are made directly from the Company.

The following table sets forth the changes in the benefit obligation and the plan assets during the year and reconciles the funded status of the defined benefit plans with the amounts recognized in the Consolidated Balance Sheet at December 31:

	Pension Benefits
	U.S. Plans						Non-U.S. Plans
	2014			2013			2014			2013
Change in benefit obligation
Projected benefit obligation at beginning of year	$	(220.5	)	$	(245.0	)	$	(191.1	)	$	(181.4	)
Service cost	(1.0		)	(1.2		)	(6.8		)	(5.1		)
Interest cost	(9.2		)	(8.4		)	(6.1		)	(6.1		)
Actuarial (loss) gain	(29.4		)	20.2			(25.8		)	(0.4		)
Benefits paid	14.4			13.9			10.3			10.2
Settlement	29.6			—			—			—
Foreign currency exchange rate changes	—			—			25.3			(8.3		)
Projected benefit obligation at end of year	(216.1		)	(220.5		)	(194.2		)	(191.1		)
Change in plan assets
Fair value of plan assets at beginning of year	177.4			180.5			4.2			4.0
Actual return on plan assets	17.2			5.7			—			—
Employer contributions	1.5			5.1			11.9			10.1
Settlement	(29.6		)	—			—			—
Foreign currency exchange rate changes	—			—			(0.7		)	0.3
Benefits paid	(14.4		)	(13.9		)	(10.3		)	(10.2		)
Fair value of plan assets at end of year	152.1			177.4			5.1			4.2
Funded status — plan assets less than benefit obligations	(64.0		)	(43.1		)	(189.1		)	(186.9		)
Recognized in accumulated other comprehensive income:
Net actuarial loss (gain)	18.4			(16.9		)	18.4			(0.1		)
Amounts not yet recognized as a component of net postretirement benefit cost	$	36.3		$	17.9		$	49.6		$	31.2
Amounts recorded in the balance sheet:
Accrued benefit liability — current	$	(0.6	)	$	(0.7	)	$	(8.1	)	$	(8.8	)
Accrued benefit liability — long-term	(63.4		)	(42.4		)	(181.0		)	(178.1		)
Accumulated other comprehensive loss	36.3			17.9			49.6			31.2
Net amount recognized	$	(27.7	)	$	(25.2	)	$	(139.5	)	$	(155.7	)

The accumulated benefit obligation of the U.S. plans was $215.6 million and $220.1 million as of December 31, 2014 and 2013, respectively. The accumulated benefit obligation of the non-U.S. plans was $182.7 million and $189.8 million as of December 31, 2014 and 2013, respectively.

Set forth below is a detail of the net periodic pension and other post-retirement benefit expense for the defined benefit plans for the years ended December 31:

	Pension Benefits
	U.S. Plans
	2014			2013			2012
Service cost	$	1.0		$	1.2		$	1.1
Interest cost	9.2			8.4			9.3
Amortization of unrecognized net loss	1.4			0.3			1.5
Expected return on plan assets	(10.7		)	(9.4		)	(10.4		)
Settlement charge	3.2			—			—
Net periodic benefit cost	4.1			0.5			1.5
Net loss (gain) arising during the year	22.1			(16.1		)	1.3
Net gain recognized during the year	(3.6		)	(0.8		)	(3.4		)
Total recognized in other comprehensive loss	18.5			(16.9		)	(2.1		)
Total recognized in net periodic benefit cost and other comprehensive loss	$	22.6		$	(16.4	)	$	(0.6	)

Set forth below is a detail of the net periodic pension and other post-retirement benefit expense for the defined benefit plans for the years ended December 31:

	Pension Benefits
	Non-U.S. Plans
	2014			2013			2012
Service cost	$	6.8		$	5.1		$	4.0
Interest cost	6.1			6.1			7.6
Amortization of unrecognized net loss	1.6			1.8			0.8
Net periodic benefit cost	14.5			13.0			12.4
Net loss arising during the year	25.8			0.3			29.8
Net gain recognized during the year	(1.6		)	(1.8		)	(0.8		)
Exchange rate gain (loss) gain	(5.8		)	1.4			0.8
Total recognized in other comprehensive loss	18.4			(0.1		)	29.8
Total recognized in net periodic benefit cost and other comprehensive loss	$	32.9		$	12.9		$	42.2

Future pension benefit payments expected to be paid are as follows:

	Pension
Expected benefit payments	U.S. Plans		Non-U.S. Plans
2015	$	14.4	$	10.7
2016	$	14.1	$	12.1
2017	$	14.0	$	12.3
2018	$	13.9	$	12.0
2019	$	13.8	$	10.4
2020-2024	$	67.6	$	51.4

Pension benefit payments for the U.S. pension plans are made from assets of the pension plans. We expect to contribute $0.7 million to our U.S. pension plans in 2015. Expected contributions are dependent on many variables, including the variability of the market value of the assets as compared to the obligation and other market or regulatory conditions. Accordingly, actual funding may differ significantly from current estimates. We expect to make annual benefit payments of approximately $10.7 million related to our non-U.S. pension plans in 2015.

The amounts in Accumulated other comprehensive income (loss) that are expected to be recognized as components of net periodic benefit cost during 2015 are as follows:

	U.S. Plans		Non-U.S. Plans		Total
Net actuarial loss	$	0.9	$	2.6	$	3.5

The following weighted-average assumptions were used to determine the Company’s pension benefit obligations for the year ended December 31:

	2014	2013
U.S. Plans
Discount rate — EPT Active Plans	3.7%	4.6%
Discount rate — EPT Inactive Plans	3.5%	4.4%
Discount rate — Divested Business Plans	3.5%	4.3%
Expected return on pension plan assets — EPT Active Plans	6.3%	6.5%
Expected return on pension plan assets — EPT Inactive Plans	6.3%	6.5%
Expected return on pension plan assets — Divested Business Plans	6.3%	6.5%
Rate of increases in compensation — EPT Active Plans	3.5%	3.5%
Non U.S. Plans
Discount rate	2.0%	3.5%
Rate of increases in compensation	2.5% – 3.0%	2.5% – 3.0%

The following weighted-average assumptions were used to determine the Company’s net periodic pension benefit costs for the year ended December 31:

	2014	2013
U.S. Plans
Discount rate — EPT Active Plans	4.6%	3.7%
Discount rate — EPT Inactive Plans	4.4%	3.5%
Discount rate — Divested Business Plans	4.3%	3.4%
Expected return on pension plan assets — EPT Active Plans	6.5%	7.0%
Expected return on pension plan assets — EPT Inactive Plans	6.5%	4.7%
Expected return on pension plan assets — Divested Business Plans	6.5%	6.0%
Non U.S. Plans
Discount rate	3.5%	3.5%
Expected return on pension plan assets	3.5%	3.7%

Our investment objective for defined benefit plan assets is to meet the plan’s benefit obligations, without undue exposure to risk. The investment strategy focuses on asset class diversification, liquidity to meet benefit payments and an appropriate balance of long-term investment return and risk. The Investment Committee oversees the investment allocation process, which includes the selection and evaluation of the investment manager, the determination of investment objectives and risk guidelines, and the monitoring of actual investment performance. In determining the expected long-term rate of return on defined benefit pension plan assets, management considers the historical rates of return over a period of time that is consistent with the long-term nature of the underlying obligations of these plans, the nature of investments and an expectation of future investment strategies.

We utilize the services of independent third-party investment managers to oversee the management of U.S. pension plan assets. The investment managers are allowed to exercise investment discretion, subject to limitations established by the Company.

Below are our actual and established target allocations for the EPT pension plans, representing 93% of U.S. pension plan assets:

	Actual Allocation		Target Allocation
U.S. equity securities	11	%	11	%
Non-U.S. equity securities	11	%	11	%
Fixed income	62	%	62	%
High yield	5	%	5	%
TIPS	5	%	5	%
Global REITS	5	%	5	%
Cash	1	%	1	%
Total assets	100	%	100	%

Active plan investments include U.S. equity securities which are invested broadly in U.S. companies in various industries using the Wilshire 5000 Index as the asset class benchmark. Non-U.S. equity securities are invested broadly in non-U.S. companies in various industries using the MSCI ACWI ex-U.S. Index as the asset class benchmark. Long duration fixed income consists primarily of investment grade corporate fixed income bonds benchmarked against the Barclays Capital Long Credit Index. Intermediate government fixed income consists of U.S. government bonds using the Barclays Capital Intermediate Government Index as the asset class benchmark. U.S. Treasury Inflation Protected Fixed Income (“TIPS”) invests in the U.S. Treasury inflation protected securities market using the Barclays U.S. TIPS Index as the asset class benchmark. Global REITS investments are invested in the broad global real estate securities market with the FTSE EPRA/NAREIT Developed RE Index (or other comparable index) as the asset class benchmark. High Yield Fixed Income (“High yield”) invests in broad U.S. non-investment grade fixed income bonds using the Merrill Lynch U.S. High Yield Master II as the asset class benchmark.

Our asset allocations by asset category for the Divested business and non-U.S. plans are as follows:

	December 31,
	2014		2013
U.S. equity securities	33	%	38	%
Corporate bonds	8	%	10	%
Government bonds	11	%	10	%
Other fixed income	15	%	13	%
Non-U.S. assets	31	%	27	%
Cash	2	%	2	%
Total assets	100	%	100	%

Equity securities are invested broadly in U.S. companies in various industries. Non-U.S. assets consist of equity securities of non-U.S. companies in various industries as well as foreign mutual funds.

The fair value measurements of defined benefit pension plan assets by category at December 31, 2014 are as follows:

	December 31,		Quoted Prices in Active Markets for Identical		Significant Other Observable		Significant Unobservable
Category	2014		Assets (Level 1)		Inputs (Level 2)		Inputs (Level 3)
Equity securities — US	$	21.2	$	3.9	$	17.3	$	—
Equity securities — Non US	15.4		—		15.4		—
Fixed income:
Bonds	88.6		—		88.6		—
Other fixed income	4.3		—		4.3		—
High yield	7.2		—		7.2		—
TIPS	6.7		—		6.7		—
Global REITS	7.0		—		7.0		—
Non-U.S. assets	5.1		—		5.1		—
Cash and cash equivalents	1.7		1.7		—		—
Total	$	157.2	$	5.6	$	151.6	$	—

Equity securities and fixed income, high-yield, TIPS and Global REITS investments are primarily comprised of mutual funds and common/collective trust funds. Investments in mutual funds and common/collective trust funds are valued at the net asset value per share or unit multiplied by the number of shares or units held as of the measurement date.

The defined benefit pension plans do not have any direct ownership of the Company’s common stock.

Note 12 — Accumulated Other Comprehensive Income (Loss)

(a) Changes in Accumulated Comprehensive Income (Loss) by Component

	Foreign Currency Translation Loss			Unrealized Gains and Losses on Cash Flow Hedging Derivatives			Pension and Post-Retirement Obligation			Pension and Post-Retirement Obligation Tax Impact		Accumulated Other Comprehensive Income (Loss)
Beginning balance at January 1, 2014	$	(5.5	)	$	(0.2	)	$	(49.1	)	$	9.6	$	(45.2	)
Other comprehensive (loss) income before reclassifications	(81.7		)	—			(42.0		)	5.7		(118.0		)
Amounts reclassified from accumulated other comprehensive income (loss)	—			0.2			5.2			—		5.4
Net current-period other comprehensive (loss) income	(81.7		)	0.2			(36.8		)	5.7		(112.6		)
Ending balance at December 31, 2014	$	(87.2	)	$	—		$	(85.9	)	$	15.3	$	(157.8	)

(b) Reclassifications out of Accumulated Other Comprehensive Income (loss)

Details about Accumulated Other Comprehensive Income (loss) Components	Amounts Reclassified from Accumulated Other Comprehensive Income (loss)	Affected Line Item in the Statement Where Net Income is Presented
Unrealized gains and losses on cash flow hedging derivatives	0.2	Cost of goods sold
Pension and post-retirement obligation	5.2	Cost of goods sold

Note 13 — Earnings Per Share

The following table sets forth the computation of basic and dilutive loss per common share from continuing operations attributable to OM Group, Inc. common stockholders for the years ended December 31:

	2014			2013			2012
Amounts attributable to OM Group, Inc. common stockholders:
(in millions, except per share amounts)
Loss from continuing operations, net of tax	$	(172.3	)	$	(71.7	)	$	(38.3	)
Loss per common share - basic:
Loss from continuing operations	$	(5.54	)	$	(2.27	)	$	(1.21	)
Loss per common share - assuming dilution:
Loss from continuing operations	$	(5.54	)	$	(2.27	)	$	(1.21	)
Weighted average shares outstanding — basic	31.1			31.6			31.9
Dilutive effect of stock options and restricted stock	—			—			—
Weighted average shares outstanding — assuming dilution	31.1			31.6			31.9

The following table sets forth the computation of basic and diluted net loss per common share attributable to OM Group, Inc. common stockholders for the years ended December 31:

	2014			2013			2012
Amounts attributable to OM Group, Inc. common stockholders:
(in millions, except per share amounts)
Net loss	$	(172.6	)	(84.0		)	$	(38.7	)
Loss per common share - basic:
Net loss	$	(5.55	)	$	(2.66	)	$	(1.22	)
Loss per common share - assuming dilution:
Net loss	$	(5.55	)	$	(2.66	)	$	(1.22	)
Weighted average shares outstanding — basic	31.1			31.6			31.9
Dilutive effect of stock options and restricted stock	—			—			—
Weighted average shares outstanding — assuming dilution	31.1			31.6			31.9

We use the treasury stock method to calculate the effect of outstanding share-based compensation awards, which requires the computation of total employee proceeds as the sum of (a) the amount the employee must pay upon exercise of the award, (b) the amount of unearned share-based compensation costs attributed to future services and (c) the amount of tax benefits, if any, that would be credited to additional paid-in capital assuming exercise of the award. Shares, under share-based compensation awards, for which the total employee proceeds exceed the average market price over the applicable period have an anti-dilutive effect on earnings per share, and accordingly, are excluded from the calculation of diluted earnings per share.

In the years ended December 31, 2014 and 2013, stock options to purchase 0.1 million shares and 0.1 million shares, respectively, of common stock were excluded from the calculation of dilutive earnings per share because the options’ exercise prices were greater than the average market price of the common shares and, therefore, the effect would have been anti-dilutive. As we had a loss from continuing operations for the years presented above, the effect of including dilutive securities in the earnings per share calculation would have been anti-dilutive. Accordingly, all shares under share-based compensation awards were excluded from the calculation of loss from continuing operations attributable to OM Group, Inc. common stockholders assuming dilution and net loss attributable to OM Group, Inc. common stockholders assuming dilution.

Note 14 — Share-Based Compensation

On May 13, 2014, our stockholders approved the 2014 Equity and Incentive Compensation Plan (the “2014 Plan”). The 2014 Plan supersedes and replaces the 2007 Incentive Compensation Plan (the “2007 Plan”), which terminated upon the approval of the 2014 Plan. No further grants may be made under the 2007 plan.  The termination of the 2007 Plan will not impact outstanding awards issued as part of the 2007 Plan. 

Under the 2014 Plan, we may provide equity-based compensation in the form of stock options, stock appreciation rights (or SARs), restricted stock, restricted stock units (or RSUs), performance shares, performance units, dividend equivalents and other stock or stock-based awards to selected employees and non-employee directors.   The 2014 Plan also provides for the issuance of common stock to non-employee directors as all or part of their annual compensation for serving as directors, as may be determined by the board of directors.

The total number of shares of common stock available for awards under the 2014 Plan (including any annual stock issuances made to non-employee directors) is 2,550,000.  Awards other than stock options and SARs will be counted against the aggregate share limit as 1.79 shares of common stock.  Under the 2014 Plan, no more than 1,424,581 shares of common stock could be issued in settlement of restricted stock unit (“RSU”) awards.  In addition, no person will be granted (i) stock options or SARs, in the aggregate, for more than 400,000 shares of common stock during any calendar year or (ii) awards of restricted stock, RSUs, performance shares or other stock-based awards intended to qualify as “qualified performance-based compensation” under Section 162(m) of the Internal Revenue Code, in the aggregate, for more than 400,000 shares of common stock during any calendar year.

The 2014 Plan and the 2007 Plan provide that all options granted must have an exercise price of not less than the per share fair market value on the date of grant and that no option may have a term of more than ten years. We satisfy stock option exercises and restricted stock awards through the issuance of authorized but unissued shares or treasury shares.

Set forth below is a summary of share-based compensation expense for option grants, restricted stock awards and restricted stock unit awards included as a component of Selling, general and administrative expenses in the Statements of Consolidated Operations for the year ended December 31:

	2014		2013		2012
Stock options and restricted stock awards	$	6.5	$	5.4	$	5.0
Restricted stock unit awards	0.6		0.3		0.2
Share-based compensation expense - employees	$	7.1	$	5.7	$	5.2
Share-based compensation expense - non-employee directors	$	0.5	$	0.5	$	0.5

No tax benefit for share-based compensation was realized during 2014, 2013 or 2012 as a result of the valuation allowance against U.S. deferred tax assets.

At December 31, 2014, there was $6.3 million of unrecognized compensation expense related to unvested share-based awards. That cost is expected to be recognized as follows: $4.6 million in 2015, $1.6 million in 2016 and $0.1 million in 2017 as a component of Selling, general and administrative expenses. Unearned compensation expense is recognized over the vesting period for the particular grant. Total unrecognized compensation cost will be adjusted for future changes in actual and estimated forfeitures, updated vesting assumptions for the performance awards, and fluctuations in the fair value of restricted stock unit awards.

Our non-employee directors are paid a portion of their annual retainer in unrestricted shares of common stock which are valued as of the last trading date of the quarter. For purposes of determining the number of shares of common stock to be issued prior to May 13, 2014, the 2007 plan provides that shares are to be valued at the average of the high and low sale price of the Company’s common stock on the New York Stock Exchange ("NYSE"). Pursuant to the 2007 plan we issued 7,084 shares in the six months ended June 30, 2014 and 18,069 shares and 23,752 shares in the 12 months ended December 31, 2013 and 2012, respectively, to non-employee directors. For purposes of determining the number of shares of common stock to be issued subsequent to May 13, 2014, the 2014 plan provides that shares are to be valued at the closing sale price of the Company’s common stock on the NYSE. Pursuant to the 2014 plan, we issued 8,795 shares in the 12 months ended December 31, 2014.

Stock Options

Options granted generally vest in equal increments over a three-year period from the grant date. Upon any change in control of the Company, as defined in the applicable plan, or upon death, disability or retirement, the stock options become 100% vested and exercisable. We account for options that vest over more than one year as one award and recognize expense related to those awards on a straight-line basis over the vesting period.

During 2014, 2013 and 2012, we granted stock options to purchase 230,300, 273,200 and 238,319 shares of common stock, respectively. Included in the 2012 grants are stock options to purchase4,419 shares of common stock with a vesting period of one year, which were granted to our Chief Executive Officer (“CEO”) in connection with achievement of financial performance criteria in 2011 under our then high-performance incentive plan.

The fair value of options was estimated at the date of grant using a Black-Scholes options pricing model with the following weighted-average assumptions:

	2014			2013			2012
Risk-free interest rate	1.9		%	1.1		%	1.1		%
Dividend yield	0.9		%	—			—
Volatility factor of Company common stock	56		%	54		%	55		%
Weighted-average expected option term (years)	6			6			6
Weighted-average grant-date fair value	$	15.03		$	13.49		$	15.29

The risk-free interest rate assumption is based upon the U.S. Treasury yield curve appropriate for the term of the options being valued. The dividend yield assumption was ninety-four hundredths for the awards in 2014 due to the initiation of a dividend by the Company. The dividend assumption was previously zero based on the historical expectation of retaining earnings for use in operations at the time of the award issuances in 2013 and 2012. Expected volatilities are based on historical volatility of our common stock. The expected term of options granted is determined using the simplified method allowed by Staff Accounting Bulletin (“SAB”) No. 110 as historical data was not sufficient to provide a reasonable estimate. Under this approach, the expected term is presumed to be the mid-point between the vesting date and the end of the contractual term.    

The following table sets forth the number of option shares and weighted-average grant-date fair value:

	Shares		Weighted-Average Fair Value at Grant Date
Non-vested at December 31, 2012	442,626		$	17.20
Granted during 2013	273,200		13.49
Vested during 2013	(214,816	)	17.37
Forfeited during 2013	(64,983	)	16.02
Non-vested at December 31, 2013	436,027		14.78
Granted during 2014	230,300		15.03
Vested during 2014	(218,532	)	15.18
Forfeited during 2014	(26,581	)	14.74
Non-vested at December 31, 2014	421,214		$	14.36

A summary of our stock option activity for 2014 is as follows:

	Shares		Weighted Average Exercise Price		Weighted Average Remaining Contractual Term	Aggregate Intrinsic Value
Outstanding at January 1, 2014	1,308,573		$	34.81
Granted	230,300		32.06
Exercised	(18,764	)	28.03
Expired unexercised	(36,201	)	38.91
Forfeited	(26,581	)	29.96
Outstanding at December 31, 2014	1,457,327		$	32.97	5.4	$	7.9
Vested or expected to vest at December 31, 2014	1,431,451		$	33.04	5.4	$	7.7
Exercisable at December 31, 2014	1,042,314		$	34.30	4.2	$	4.4

The fair value of options that vested during 2014, 2013 and 2012 was $3.3 million, $3.7 million and $3.5 million, respectively. The intrinsic value of options exercised in 2014 and 2013 was $0.1 million and $1.2 million, respectively. No stock options were exercised in 2012. The intrinsic value of an option represents the amount by which the market value of the stock exceeds the exercise price of the option.

We received cash payments of $0.5 million and $2.8 million in 2014 and 2013, respectively, in connection with the exercise of stock options previously granted. The Company does not settle stock options for cash.

Restricted Stock 

We issue restricted stock and, beginning in 2012, issue stock-settled restricted stock units to our employees in the U.S (“Restricted Stock," and "US-Based RSUs," respectively). We issue restricted stock units to employees outside the U.S. ("International RSUs"). Certain of the Restricted Stock, US-Based RSUs, and International RSU awards contain time-based vesting conditions and certain of the awards contain performance-based vesting conditions.

The Restricted Stock and US-Based RSU awards are in all cases settled in our common stock. The value of the Restricted Stock and US-Based RSU awards are based upon the market price of an unrestricted share of our common stock at the date of grant. We recognize compensation expense ratably over the requisite performance period based upon the number of awards that are anticipated to vest. The number of awards anticipated to vest is evaluated quarterly and compensation expense is adjusted accordingly. We may withhold shares issued upon vesting if directed by individual employees as a means of meeting minimum statutory tax withholding requirements. We hold the surrendered shares as treasury stock.

The International RSUs are settled in a cash payment that is based on the market price of an unrestricted share of our common stock at the vesting date. Since the awards will be settled in cash, they are treated as a liability award in accordance with the “Stock Compensation” topic of the ASC and are presented as a component of Other non-current liabilities on the Consolidated Balance Sheets. During the vesting period we remeasure the fair value of the International RSUs at each reporting date until the award is settled. Fluctuations in the fair value of the International RSUs are recorded as increases or decreases to compensation expense. Over the life of these awards, the cumulative amount of compensation expense recognized will match the actual cash paid.

Performance-Based Awards

During 2014, 2013 and 2012, we awarded 206,225, 245,950 and 130,500 shares, respectively, of performance-based Restricted stock to U.S. employees and 24,175, 35,150, and 33,450 performance-based International RSUs, respectively, to employees outside the U.S. (collectively "Performance-Based Awards").

The number of Performance-Based Awards that ultimately vest is based upon our achievement of specific measurable financial performance criteria. A recipient of Performance-Based Awards may earn a total award ranging from 0% to 100% of the initial grant, with the target being 50% of the initial grant. The Performance-Based Awards granted during 2013 and 2014 will vest upon the satisfaction of established performance criteria based on average return on net assets and the performance of our share price as compared to the performance of the Russell 2000 unweighted index over a three-year performance period ending December 31, 2015 and 2016, respectively.

The performance period for Performance-Based Awards granted during 2012 ended on December 31, 2014. The vesting of these awards was based on the achievement of consolidated EBITDA margin percentage measured against a predetermined peer group, and average return on net assets, in each case over three-year performance periods ending December 31, 2014. Based upon our performance against the stated performance objectives, 4% of the Performance-Based Awards granted in 2012 remain available to vest, or roughly 3,927 shares of Restricted Stock and 548 International RSUs. Vesting is conditional on approval from the Compensation Committee that the performance objectives were satisfied. The Compensation Committee makes this determination in the first quarter of 2015.

The performance period for Performance-Based Awards granted during 2011 ended on December 31, 2013. The vesting of these awards was based on the achievement of consolidated EBITDA margin percentage (as defined above) measured against a predetermined peer group, and average return on net assets, in each case over three-year performance periods ending December 31, 2013. Based upon our performance against the stated performance objectives, 20% of the Performance-Based Awards granted in 2011 vested, or roughly 18,194 shares of Restricted Stock and 850 International RSUs. The Compensation Committee approved this vesting in the first quarter of 2014.

Upon any change in control of the Company, as defined in the plan, the Performance-Based Awards under the terms of the award agreements vest at the target level. In the event of retirement, death, or disability, a pro rata number of Performance-Based Awards shall remain eligible for vesting at the end of the performance period.

A summary of our Performance-Based Awards for 2014 is as follows:

	International Restricted Stock Units		US Shares of Restricted Stock		Weighted Average Grant Date Fair Value
Non-vested at January 1, 2014	61,250		435,090		$	29.56
Granted	24,175		206,225		32.20
Vested	(850	)	(18,194	)	36.51
Forfeited	(12,183	)	(125,617	)	33.63
Non-vested at December 31, 2014	72,392		497,504		$	29.37
Expected to vest as of December 31, 2014	9,516		57,189

For awards granted prior to 2011, no performance-based shares vested and were issued in 2014, 2013 or 2012.

Time-Based Awards

In 2014, 2013 and 2012 we awarded 18,525, 60,000 and 69,327 time-based restricted stock units (RSUs); in 2012 we issued 20,000 shares of time-based restricted stock, respectively (collectively "US Time-Based Awards"). Included in the 2012 grant are 2,177 units of time-based awards with a vesting period of one year, which were granted to our Chief Executive Officer ("CEO") in connection with achievement of financial performance criteria under our then high performance annual incentive program. The value of the restricted stock units and restricted stock awarded in 2014, 2013 and 2012, based upon the market price of an unrestricted share of our common stock at the date of grant, was $0.6 million, $1.5 million and $2.6 million, respectively. During 2014, 2013 and 2012, we also awarded 6,050, 7,950, and 17,060 Time-Based International RSUs, respectively.

The US Time-Based Awards and Time-Based International RSUs have similar terms and vest three years from the date of grant, subject to the recipient remaining employed by the Company on that date. Upon any change in control of the Company, as defined in the plan, or upon retirement, the Time-Based Awards become 100% vested. A pro rata number of Time-Based Awards will vest in the event of death or disability prior to the stated vesting date.

A summary of our Time-Based awards for 2014 is as follows:

	Time-Based International RSUs		Shares of US Time-Based Awards		Weighted Average Grant Date Fair Value - US Time-Based Awards
Non-vested at January 1, 2014	16,330		180,560		$	29.26
Granted - three year vesting	6,050		18,525		32.17
Vested	(6,220	)	(50,895	)	35.99
Forfeitures	(1,085	)	(13,020	)	29.63
Non-vested at December 31, 2014	15,075		135,170		$	27.08
Expected to vest as of December 31, 2014	13,967		130,174

The following US Time-Based Awards vested and were issued in the respective years ended December 31:

	2014		2013		2012
Vested - three year vesting period	50,895		54,300		22,100
Vested -one year vesting period	—		2,177		2,767
Shares surrendered to pay withholding taxes	(18,069	)	(19,645	)	(8,538	)
Net shares issued	32,826		36,832		16,329

Note 15 — Commitments and Contingencies

We have potential contingent liabilities with respect to environmental matters related to our former operations in Brazil which were sold in 2003. Environmental cost-sharing arrangements are in place between the original owner and operator of these operations and between the Company and the subsequent purchaser of these operations. We have reviewed the limited information made available to us on the environmental conditions and are awaiting more detailed information from the purchaser. We cannot currently evaluate whether or not, or to what extent, we will be responsible for any remediation costs until more detailed information is received and validated.

From time to time, we are subject to various legal and regulatory proceedings, claims and assessments that arise in the normal course of business. The ultimate resolution of such proceedings, claims and assessments is inherently unpredictable and, as a result, our estimates of liability, if any, are subject to change and actual results may materially differ from such estimates. Our estimate of any costs to be incurred as a result of these proceedings, claims and assessments are accrued when the liability is considered probable and the amount can be reasonably estimated. We believe the amount of any current potential liability with respect to legal and regulatory proceedings, claims and assessments will not have a material adverse effect upon our financial condition, results of operations, or cash flows.

Note 16 — Lease Obligations

We rent office space, equipment, and land under long-term operating leases. Our operating lease expense was $8.0 million in 2014, $8.8 million in 2013 and $9.6 million in 2012.

Future minimum payments under noncancellable operating leases at December 31, 2014 are as follows for the years ending December 31:

2015	$	6.6
2016	6.0
2017	5.1
2018	3.4
2019	2.1
Thereafter	8.2
Total minimum lease payments	$	31.4

Note 17 — Reportable Segments and Geographic Information

We determine our segments based on how the chief operating decision maker makes decisions about allocating resources to segments and measuring their performance. We operate and report our results in four operating segments: Magnetic Technologies, Battery Technologies, Specialty Chemicals and Advanced Materials. Intersegment transactions are immaterial and generally recognized based on current market prices and are eliminated in consolidation. Corporate is comprised of general and administrative expenses not allocated to the operating segments.

The Magnetic Technologies segment develops, manufactures and distributes differentiated, high-performance industrial-use magnetic materials and related products and systems with exceptional magnetic and/or physical properties for a wide array of end markets, including automotive systems, electrical installation technology, energy conversion and distribution, industrial, retail and renewable energy.

The Specialty Chemicals segment develops, produces and supplies chemicals for electronic applications; industrial applications including coatings, composites and tire; and photomasks used by customers to produce semiconductors and related products.

The Battery Technologies segment provides advanced batteries, battery management systems, battery-related research and energetic devices for defense, space, medical and commercial markets.

The Advanced Materials segment manufactured inorganic products using unrefined cobalt and other metals and served the mobile energy storage, renewable energy, automotive systems, construction and mining, and industrial end markets.

The following table reflects the results of our reportable segments:

	2014			2013			2012
Net sales
Magnetic Technologies	$	495.0		$	522.6		$	631.6
Specialty Chemicals (e)	316.1			318.6			323.6
Battery Technologies	153.8			150.3			143.0
Advanced Materials	102.6			166.3			447.0
Intersegment items	—			(0.3		)	(0.8		)
	$	1,067.5		$	1,157.5		$	1,544.4
Operating profit (loss)
Magnetic Technologies (a)(b)(c)	$	(177.1	)	$	22.4		$	(22.3	)
Specialty Chemicals (a)(b)(d)(e)	31.3			35.8			34.5
Battery Technologies (a)(b)	19.9			21.8			19.6
Advanced Materials	(5.6		)	(0.4		)	6.4
Corporate(a)(b)(f)	(33.6		)	(38.5		)	(42.9		)
	(165.1		)	41.1			(4.7		)
Interest expense	$	(2.6	)	$	(12.3	)	$	(49.7	)
Foreign exchange gain (loss)	(6.5		)	8.0			(0.8		)
Gain (loss) on divestiture of Advance Materials business	1.7			(111.6		)	—
Other income (expense), net	(0.3		)	12.0			6.6
	(7.7		)	(103.9		)	(43.9		)
Loss from continuing operations before income taxes	(172.8		)	(62.8		)	(48.6		)
Expenditures for property, plant & equipment
Magnetic Technologies	$	26.5		$	30.8		$	27.3
Specialty Chemicals (e)	3.1			7.6			4.9
Battery Technologies	4.5			5.3			5.8
Advanced Materials	—			6.3			29.6
Corporate	0.4			3.1			—
	$	34.5		$	53.1		$	67.6
Depreciation and amortization
Magnetic Technologies	$	42.2		$	44.2		$	40.8
Specialty Chemicals (e)	14.0			14.8			15.7
Battery Technologies	10.5			10.1			10.1
Advanced Materials	—			3.9			16.9
Corporate	0.8			0.9			0.8
	$	67.5		$	73.9		$	84.3
Total assets
Magnetic Technologies	$	675.0		$	1,020.6
Specialty Chemicals (e)	396.3			416.5
Battery Technologies	265.9			237.4
Advanced Materials	10.6			17.9
Corporate	71.7			90.7
	$	1,419.5		$	1,783.1

(a) The year ended December 31, 2014 includes a $195.4 million goodwill and intangible asset non-cash impairment charge in Magnetic Technologies. The results also include costs related to cost optimization and other business improvement initiatives of $1.9 million in Magnetic Technologies, $2.6 million in Battery Technologies, $2.1 million in Specialty Chemicals, and $0.2 million in Corporate, respectively. Cost reduction initiatives include headcount reductions, minor facility consolidation, supply chain optimization, corporate cost reductions, and other structural changes. There was also a $3.2 million non-cash pension settlement charge in Battery Technologies during the fourth quarter.

(b) The year ended December 31, 2013 includes charges related to cost reduction initiatives of $5.4 million in Magnetic Technologies, $0.8 million in Battery Technologies, $1.1 million in Specialty Chemicals and $2.4 million in Corporate, respectively.

(c) Includes $55.9 million of charges related to the VAC inventory purchase accounting step-up and LCM charges in 2012.

(d) Includes property sale gains of $2.9 million in 2012.

(e) All results related to the UPC business are excluded from the Specialty Chemicals segment for all periods presented.

(f) Includes a $2.5 million non-cash pension settlement charge to certain participants in one of our U.S. defined benefit pension plans in 2012.

	Net Sales(a)(c)		Long-Lived Assets(b)(c)
Geographic Region Information
2014
Germany	544.3		217.5
United States	263.3		76.1
Finland	102.6		—
Other	157.3		14.7
	$	1,067.5	$	308.3
2013
Germany	$	571.9	$	247.9
United States	296.2		79.5
Finland	102.6		—
Japan	29.3		—
Other	157.5		18.2
	$	1,157.5	$	345.6
2012
Germany	$	681.4
United States	324.9
Finland	229.7
Japan	161.7
Other	146.7
	$	1,544.4

(a) Net sales attributed to the geographic area are based on the location of the manufacturing facility, except for Japan, which was a sales office and included in the divestiture of the Advance Materials business.

(b) Long-lived assets consists of property, plant and equipment, net.

(c) All results and balances related to the UPC business are excluded for all periods presented.

Note 18 — Quarterly Results of Operations (Unaudited)

The sum of the quarter income (loss) per common share does not agree to the full year information due to the difference in weighted average share values between quarter to date and year to date calculations.

	2014
	First Quarter			Second Quarter			Third Quarter		Fourth Quarter			Full Year
Net sales	$	261.7		$	297.5		$	262.9	$	245.4		$	1,067.5
Gross profit	$	61.9		$	63.1		$	62.6	$	50.6		$	238.2
Amounts attributable to OM Group, Inc. common stockholders:
Income (loss) from continuing operations, net of tax	$	5.3		$	5.1		$	6.3	$	(189.0	)	$	(172.3	)
Income (loss) from discontinued operations, net of tax	(0.1		)	(0.3		)	0.1		—			$	(0.3	)
Net income (loss)	$	5.2		$	4.8		$	6.4	$	(189.0	)	$	(172.6	)
Net income (loss) per common share — basic
Continuing operations	$	0.17		$	0.16		$	0.20	$	(6.24	)	$	(5.54	)
Discontinued operations	—			(0.01		)	0.01		—			(0.01		)
Net income (loss)	$	0.17		$	0.15		$	0.21	$	(6.24	)	$	(5.55	)
Net income (loss) per common share — assuming dilution
Continuing operations	$	0.16		$	0.16		$	0.20	$	(6.24	)	$	(5.54	)
Discontinued operations	—			(0.01		)	—		—			(0.01		)
Net income (loss)	$	0.16		$	0.15		$	0.20	$	(6.24	)	$	(5.55	)

The second quarter 2014 includes costs related to cost reduction initiatives of $0.4 million in Specialty Chemicals.

The third quarter 2014 includes costs related to cost optimization and other business improvement initiatives of $0.3 million in Magnetic Technologies, $2.6 million in Battery Technologies, $1.0 million in Specialty Chemicals, and $0.1 million in Corporate, respectively.

The fourth quarter 2014 includes a $195.4 million goodwill and intangible asset non-cash impairment charge in Magnetic Technologies. The fourth quarter 2014 also includes costs related to cost optimization and other business improvement initiatives of $1.6 million in Magnetic Technologies, $0.7 million in Specialty Chemicals, and $0.1 million in Corporate, respectively. There was also a $3.2 million non-cash pension settlement charge in Battery Technologies during the fourth quarter.

	2013
	First Quarter			Second Quarter			Third Quarter			Fourth Quarter			Full Year
Net sales	$	341.8		$	279.5		$	265.7		$	270.5		$	1,157.5
Gross profit	$	74.2		$	63.8		$	65.9		$	54.6		$	258.4
Amounts attributable to OM Group, Inc. common stockholders:
Income (loss) from continuing operations, net of tax	$	(109.5	)	$	8.1		$	12.4		$	17.3		$	(71.7	)
Income (loss) from discontinued operations, net of tax	(0.5		)	(11.4		)	(0.3		)	(0.1		)	(12.3		)
Net income (loss)	$	(110.0	)	$	(3.3	)	$	12.1		$	17.2		$	(84.0	)
Net income (loss) per common share — basic
Continuing operations	$	(3.47	)	$	0.26		$	0.40		$	0.54		$	(2.27	)
Discontinued operations	(0.02		)	(0.36		)	(0.01		)	—			(0.39		)
Net income (loss)	$	(3.49	)	$	(0.10	)	$	0.39		$	0.54		$	(2.66	)
Net income (loss) per common share — assuming dilution
Continuing operations	$	(3.46	)	$	0.26		$	0.39		$	0.54		$	(2.27	)
Discontinued operations	(0.02		)	(0.36		)	(0.01		)	—			(0.39		)
Net income (loss)	$	(3.48	)	$	(0.10	)	$	0.38		$	0.54		$	(2.66	)

2013 results related to the UPC business are excluded from the Special Chemicals segment for all periods presented.

The first quarter 2013 includes a $111.6 million loss on the divestiture of the Advanced Materials business. The first quarter of 2013 also includes costs related to cost reduction initiatives of $3.8 million in Magnetic Technologies and $0.2 million in Battery Technologies.

The second quarter of 2013 includes a $9.8 million loss on the disposal of the UPC business recorded within Income (loss) from discontinued operations. The second quarter of 2013 also includes costs related to cost reduction initiatives of $0.4 million in Magnetic Technologies, $0.5 million in Battery Technologies, and $1.1 million in Specialty Chemicals.

The third quarter of 2013 includes costs related to cost reduction initiatives of $0.7 million in Magnetic Technologies, $0.1 million in Battery Technologies and $1.0 million in Corporate.

The fourth quarter of 2013 includes a $13.0 million reduction of contingent consideration related to Rahu. The fourth quarter of 2013 includes costs related to cost reduction initiatives of $0.4 million in Magnetic Technologies and $1.4 million in Corporate.

Note 19 - Subsequent Events

On February 18, 2015, we announced a wide-ranging set of competitive repositioning and cost optimization opportunities throughout the enterprise that are expected to improve our ability to serve customers, better compete in global markets and deliver stronger financial performance. The opportunities include headcount reductions across the enterprise; site consolidations; relocation of certain operations to improve our cost structure and better serve customers; better alignment of various research and development, marketing and technical activities with customers’ next generation products and applications; and further corporate cost reductions.

Over the next three years, we expect to incur total cash expenses related to these opportunities of approximately $50.0 - $65.0 million. We also anticipate annualized savings of $30.0 - $40.0 million by the end of 2017, which are expected to ramp up starting in late 2015. Certain of these opportunities will take place in Europe and are subject to negotiations with employee works councils and unions, which could impact the timing and scope of the expected expenses and savings. We expect that the cost of these opportunities will not have a material impact on our financial position or liquidity and will be funded by operating cash flows and borrowing on our revolving line of credit when necessary.

35

Item 9.  Changes in and Disagreements with Accountants on Accounting and Financial Disclosure

There are no such changes or disagreements.

Item 9A.  Controls and Procedures

Evaluation of Disclosure Controls and Procedures

Our management, with the participation of the Chief Executive Officer and the Chief Financial Officer, evaluated the effectiveness of the design and operation of our disclosure controls and procedures as of December 31, 2014. As defined in Rule 13a-15(e) under the Securities Exchange Act of 1934 (the “Exchange Act”), disclosure controls and procedures are controls and procedures designed to provide reasonable assurance that information required to be disclosed in reports filed or submitted under the Exchange Act is recorded, processed, summarized and reported on a timely basis, and that such information is accumulated and communicated to management, including our Chief Executive Officer and Chief Financial Officer, as appropriate, to allow timely decisions regarding required disclosure. Our disclosure controls and procedures include components of our internal control over financial reporting.

Based upon this evaluation, the Chief Executive Officer and Chief Financial Officer have concluded that our disclosure controls and procedures were effective as of December 31, 2014.

Management’s Report on Internal Control over Financial Reporting

Our management is responsible for establishing and maintaining adequate internal control over financial reporting, as such term is defined in Exchange Act Rules 13a-15(f ) and 15d-15(f ). Under the supervision of the Chief Executive Officer and Chief Financial Officer, management conducted an evaluation of the effectiveness of our internal control over financial reporting as of December 31, 2014 based on the framework set forth in 2013 by the Committee of Sponsoring Organizations of the Treadway Commission (COSO) in “Internal Control-Integrated Framework”. Based on that evaluation, management has concluded that our internal control over financial reporting was effective as of December 31, 2014.

The Company's independent registered public accounting firm, Ernst & Young LLP, audited the Company's internal control over financial reporting and, based on that audit, issued an attestation report regarding the Company's internal control over financial reporting, which is included in this Annual Report.

Changes in Internal Controls

There were no changes in the Company's internal control over financial reporting, identified in connection with management's evaluation of internal control over financial reporting, that occurred during the three months ended December 31, 2014 and materially affected, or are reasonably likely to materially affect, the Company's internal control over financial reporting.

Item 9B.  Other Information

None.

PART III

Item 10.  Directors, Executive Officers of the Registrant and Corporate Governance

Information with respect to our directors will be set forth under the heading “Proposal 1. Election of Directors” in the Company’s proxy statement to be filed pursuant to Regulation 14A under the Exchange Act in connection with the 2015 Annual Meeting of Stockholders of the Company (the “2015 Proxy Statement”) and is incorporated herein by reference. For information with respect to our executive officers, see “Executive Officers of the Registrant” in Part I of this Form 10-K.

Information with respect to the our audit committee, nominating and governance committee, compensation committee and the audit committee financial experts will be set forth in the 2015 Proxy Statement under the heading “Corporate Governance and Board Matters” and is incorporated herein by reference.

Information with respect to compliance with Section 16(a) of the Exchange Act will be set forth in the 2014 Proxy Statement under the heading “Section 16(a) Beneficial Ownership Reporting Compliance” and is incorporated herein by reference.

We have adopted a Code of Conduct and Ethics that applies to all of our employees, including the principal executive officer, the principal financial officer and the principal accounting officer. The Code of Conduct and Ethics, our corporate governance principles and all committee charters are posted on the “Corporate Governance” portion of the our website (www.omgi.com). A copy of any of these documents is available in print free of charge to any stockholder who requests a copy, by writing to OM Group, Inc., 950 Main Avenue, Suite 1300, Cleveland, Ohio 44113 USA, Attention: Rob Pierce, Vice President, Finance.

On June 6, 2014, we filed the annual certification by our CEO that, as of the date of the certification, he was unaware of any violation by the Company of the corporate governance listing standards of the New York Stock Exchange.

Item 11.  Executive Compensation

Information with respect to executive and director compensation and compensation committee interlocks and insider participation, together with the report of the compensation committee regarding the compensation discussion and analysis will be set forth in the 2015 Proxy Statement under the headings “Executive Compensation,” “Corporate Governance and Board Matters — Compensation Committee Interlocks and Insider Participation” and “Compensation Committee Report” and is incorporated herein by reference.

Item 12.  Security Ownership of Certain Beneficial Owners and Management and Related Stockholder Matters

Information with respect to security ownership of certain beneficial owners and management will be set forth in the 2015 Proxy Statement under the heading “Security Ownership of Directors, Executive Officers and Certain Beneficial Owners — Beneficial Ownership” and is incorporated herein by reference.

Equity Compensation Plan Information

The following table sets forth information concerning common stock issuable pursuant to our equity compensation plans as of December 31, 2014.

	Number of securities to be issued upon exercise of outstanding options	Weighted-average exercise price of outstanding options		Number of securities remaining available for future issuance under equity compensation plans (excluding securities issuable under outstanding options)
Equity Compensation Plans Approved by the Stockholders	1,368,391	$	32.93	2,884,763
Equity Compensation Plans Not Approved by the Stockholders(a)	88,934	$	33.67	—
Total	1,457,325	$	32.97	2,884,763

__________________________________

(a) As an inducement to join the Company, on June 13, 2005, the Chief Executive Officer was granted options to purchase 88,934 shares of common stock that are not covered by the equity compensation plans approved by our stockholders. These options have an exercise price of $33.67 per share (the market price of our stock on the grant date was $24.89) and became exercisable on May 31, 2008. The options have an expiration date of June 13, 2015.

Item 13.  Certain Relationships and Related Transactions, Director Independence

Information with respect to certain relationships and related transactions, as well as director independence, will be set forth in the 2015 Proxy Statement under the heading “Corporate Governance and Board Matters” and is incorporated herein by reference.

Item 14.  Principal Accountant Fees and Services

Information with respect to principal accounting fees and services will be set forth in the 2015 Proxy Statement under the heading “Description of Principal Accountant Fees and Services” and is incorporated herein by reference.

36

PART IV

Item 15.  Exhibits and Financial Statement Schedules

The following Consolidated Financial Statements of OM Group, Inc. are included in Part II, Item 8:

(1) Consolidated Balance Sheets at December 31, 2014 and 2013

Statements of Consolidated Operations for the years ended December 31, 2014, 2013 and 2012

Statements of Consolidated Comprehensive Income (Loss) for the years ended December 31, 2014, 2013 and 2012

Statements of Consolidated Cash Flows for the years ended December 31, 2014, 2013 and 2012

Statements of Consolidated Total Equity for the years ended December 31, 2014, 2013 and 2012

Notes to Consolidated Financial Statements

(2) Schedule II — Valuation and Qualifying Accounts for the years ended December 31, 2014, 2013 and 2012

All other schedules are omitted because they are not applicable or because the information required is included in the consolidated financial statements or the notes thereto.

(3) Exhibits

The following exhibits are included in this Annual Report on Form 10-K:

(3) Articles of Incorporation and By-laws
3.1	Restated Certificate of Incorporation of OM Group, Inc. (incorporated by reference to Exhibit 3.1 of the Company’s Quarterly Report on Form 10-Q (No. 001-12515) filed on November 6, 2008).
3.2	Amended and Restated By-Laws of OM Group, Inc. (incorporated by reference to Exhibit 3.2 of the Company's Annual Report on Form 10-K filed February 24, 2011).
(4) Instruments defining rights of security holders including indentures.
4.1	Form of Common Stock Certificate of the Company. ‡
(10) Material Contracts
*10.1	OM Group, Inc. Benefit Restoration Plan, effective January 1, 1995 (incorporated by reference to Exhibit 10.9 to the Company's Registration Statement on Form S-4 (No. 333-84128) filed on March 11, 2002).
*10.2	Trust under OM Group, Inc. Benefit Restoration Plan, effective January 1, 1995 (incorporated by reference to Exhibit 10.10 to the Company's Registration Statement on Form S-4 (No. 333-84128) filed on March 11, 2002).
*10.3	Amendment to OM Group, Inc. Benefit Restoration Plan (frozen Post-2004/Pre-2008 Terms) (incorporated by reference to Exhibit 10.4 of the Company's Annual Report filed on Form 10-K (No. 001-12515) on February 28, 2008).
10.4	Credit Agreement, dated as of August 2, 2011, among OM Group, Inc. and Harko C.V., as borrowers, Bank of America, N.A., as Administrative Agent, Swing Line Lender and L/C Issuer, and the Other Lenders Party Thereto Merrill Lynch, Pierce, Fenner & Smith Incorporated, PNC Capital Markets LLC and BNP Securities Corp., as Joint Lead Arrangers and Joint Bookrunning Managers (incorporated by reference to Exhibit 10.1 to the Company's Current Report on form 8-K filed August 4, 2011).
10.5	Sale and Purchase Agreement, dated December 23, 2009, by and among EaglePicher Corporation, as guarantor of the Seller, EaglePicher Technologies Holdings, LLC, as the Seller, EaglePicher Technologies, LLC, as the Company, OM Group, Inc., as limited guarantor of the Buyer, and OMG Energy Holdings, Inc., as the Buyer (incorporated by reference to Exhibit 10.8 to the Company's Annual Report on Form 10-K (No. 001-12515) filed on February 25, 2010).

*10.6	OM Group, Inc., 1998 Long-Term Incentive Compensation Plan (incorporated by reference to Exhibit 10.12 to the Company's Annual Report on Form 10-K filed February 24, 2011).
*10.7	Separation Agreement dated October 17, 2003, by and between OM Group, Inc. and Thomas R. Miklich (incorporated by reference to Exhibit 10.13 to the Company's Annual Report on Form 10-K filed February 24, 2011).
*10.8	Form of Stock Option Agreement between OM Group, Inc. and Joseph M. Scaminace (incorporated by reference to Exhibit 10.14 to the Company's Annual Report on Form 10-K filed February 24, 2011).
*10.9	Share Purchase Agreement dated July 3, 2011, by and among VAC Luxembourg S.á.r.l., OMG Germany Holding GmbH and OM Group, Inc. (incorporated by reference to Exhibit 2.1 to the Company's Current Report on Form 8-K filed July 7, 2011).
10.10	Stockholder Agreement, dated July 3, 2011, by and among OM Group, Inc., VAC Luxembourg S.á.r.1, and One Equity Partners II, L.P. (incorporated by reference to Exhibit 10.1 to the Company's Current Report on Form 8-K filed July 7, 2011).
*10.11	Form of Indemnification Agreement between OM Group, Inc. and its directors and certain officers (incorporated by reference to Exhibit 10 to the Company's Current Report on Form 8-K filed on January 25, 2011).
*10.12	Form of Non-Incentive Stock Option Agreement under the 1998 Long-Term Incentive Compensation Plan (incorporated by reference to Exhibit 10.20 to the Company's Annual Report on Form 10-K filed February 24, 2011).
*10.13	OM Group, Inc. 2002 Stock Incentive Plan (incorporated by reference to Exhibit 99 to the Company's Current Report on Form 8-K (No. 001-12515) filed May 5, 2006).
*10.14	Form of Stock Option Agreement (2010) under the 2007 Incentive Compensation Plan (incorporated by reference to Exhibit 10.1 to the Company's Quarterly Report on Form 10-Q filed on November 4, 2010).
*10.15	Form of Restricted Stock Agreement (2010 time-based) under the 2007 Incentive Compensation Plan (incorporated by reference to Exhibit 10.2 to the Company's Quarterly Report on Form 10-Q filed on November 4, 2010).
*10.16	Form of Restricted Stock Agreement (2010 performance-based) under the 2007 Incentive Compensation Plan (incorporated by reference to Exhibit 10.3 to the Company's Quarterly Report on Form 10-Q filed on November 4, 2010).
*10.17	Form of OM Group, Inc. Executive Severance Plan, effective May 31, 2011, for the benefit of certain employees (incorporated by reference to Exhibit 10.1 to the Company's Current Report on Form 8-K filed May 27, 2011).
*10.18	Form of Amended and Restated Change in Control Agreement between OM Group, Inc. and certain executive officers (incorporated by reference to Exhibit 99.2 to the Company's Current Report on Form 8-K (No. 001-12515) filed on November 14, 2006).
*10.19	Amended and Restated Change in Control Agreement dated as of November 13, 2006 between OM Group, Inc. and Joseph M. Scaminace (incorporated by reference to Exhibit 99.4 to the Company's Current Report on Form 8-K (No. 001-12515) filed on November 14, 2006).
*10.20	OM Group, Inc. 2007 Amended and Restated Incentive Compensation Plan (incorporated by reference to Exhibit 10.1 to the Company's Current Report on Form 8-K filed on March 21, 2012).
*10.21	Form of Amended and Restated Change in Control Agreement between OM Group, Inc. and certain executive officers (incorporated by reference to Exhibit 10.33 to the Company's Annual Report on Form 10-K filed February 24, 2011).
*10.22	Form of Stock Option Agreement under the 2007 Incentive Compensation Plan (incorporated by reference to Exhibit 10.1 to the Company's Quarterly Report on Form 10-Q (No. 001-12515) filed on November 2, 2007).
*10.23	Form of Restricted Stock Agreement (time-based) under the 2007 Incentive Compensation Plan (incorporated by reference to Exhibit 10.2 to the Company's Quarterly Report on Form 10-Q (No. 001-12515) filed on November 2, 2007).
*10.24	Form of Restricted Stock Agreement (performance-based) under the 2007 Incentive Compensation Plan (incorporated by reference to Exhibit 10.3 to the Company's Quarterly Report on Form 10-Q (No. 001-12515) filed on November 2, 2007).
*10.25	OM Group, Inc. Deferred Compensation Plan (incorporated by reference to Exhibit 10 to the Company's Current Report on Form 8-K (No. 001-12515) filed July 2, 2008).

*10.26	Form of Change in Control Agreement between OM Group, Inc. and certain executive officers (incorporated by reference to Exhibit 10.38 to the Company's Annual Report on Form 10-K filed on February 28, 2012).
10.27	Amendment No. 1, dated as of August 1, 2012, to the Credit Agreement, dated as of August 2, 2011, among OM Group, Inc. and Harko C.V., as borrowers, and Bank of America, N.A., as Administrative Agent, Swing Line Lender and L/C Issuer (incorporated by reference to Exhibit 10.1 to the Company's Quarterly Report on Form 10-Q filed on November 9, 2012).
*10.28	Form of Stock Option Agreement (2012) under the Amended and Restated 2007 Incentive Compensation Plan (incorporated by reference to Exhibit 10.2 to the Company's Current Report on Form 8-K filed March 21, 2012).
*10.29	Form of Stock Option Agreement (2012 International) under the Amended and Restated 2007 Incentive Compensation Plan (incorporated by reference to Exhibit 10.3 to the Company's Current Report on Form 8-K filed March 21, 2012).
*10.30	Form of Restricted Stock Agreement (2012 Performance-Based) under the Amended and Restated 2007 Incentive Compensation Plan (incorporated by reference to Exhibit 10.4 to the Company's Current Report on Form 8-K filed March 21, 2012).
*10.31	Form of Restricted Stock Unit Agreement (2012 Performance-Based International) under the Amended and Restated 2007 Incentive Compensation Plan (incorporated by reference to Exhibit 10.5 the Company's Current Report on Form 8-K filed March 21, 2012).
*10.32	Form of Restricted Stock Unit Agreement (2012 Time-Based) under the Amended and Restated 2007 Incentive Compensation Plan (incorporated by reference to Exhibit 10.6 to the Company's Current Report on Form 8-K filed March 21, 2012).
*10.33	Form of Restricted Stock Unit Agreement (2012 Time-Based International) under the Amended and Restated 2007 Incentive Compensation Plan (incorporated by reference to Exhibit 10.7 to the Company's Current Report on Form 8-K filed on March 21, 2012).
10.34	Asset and Stock Purchase Agreement Among OMG Harjavalta Chemicals Holding BV, OMG Americas, Inc., OM Group, Inc., Koboltti Chemicals Holdings Limited and, Freeport-McMoran Corporation Dated as of January 21, 2013 (incorporated by reference to Exhibit 10.39 to the Company's Annual report on Form 10-K filed February 28, 2013) .
10.35	Amendment No.2 and Waiver to Credit Agreement dated as of July 1, 2013 to the Credit Agreement dated as of August 2, 2011, among OM Group, Inc., Harko C.V., and Bank of America, as administrative agent, swing line lender, and l/c issuer, and other lenders party thereto (incorporated by reference to Exhibit 10.2 to the Company's Quarterly Report on Form 10-Q filed on November 1, 2013).
10.36	Credit Agreement, dated as of September 4, 2013 among OM Group, Inc., Harko C.V., and VAC Germany GmbH, as borrowers, PNC Bank, National Association, as administrative agent, and the other agents and lenders party thereto (incorporated by reference to Exhibit 10.1 to the Company's Current Report on Form 8-K filed September 6, 2013).
10.37	Amendment No.1 to Credit Agreement dated as of November 12, 2013 to the Credit Agreement dated as of September 4, 2013, among OM Group, Inc., Harko C.V., and VAC Germany GmbH, as borrowers, PNC Bank, National Association, as administrative agent, and the other agents and lenders party thereto (incorporated by reference to Exhibit 10.37 to the Company's Annual report on Form 10-K filed February 26, 2014) . .
10.38	Amendment No.2 to Credit Agreement dated as of February 7, 2014 to the Credit Agreement dated as of September 4, 2013, among OM Group, Inc., Harko C.V., and VAC Germany GmbH, as borrowers, PNC Bank, National Association, as administrative agent, and the other agents and lenders party thereto (incorporated by reference to Exhibit 10.38 to the Company's Annual report on Form 10-K filed February 26, 2014). .
*10.39	OM Group, Inc. 2014 Equity and Incentive Compensation Plan (incorporated by reference to Exhibit 4.4 to the Company's Current Report on Form S-8 (333-197835) filed August 4, 2014).
*10.40	Form of International Non-Qualified Stock Option Agreement under the 2014 Equity and Incentive Compensation Plan (incorporated by reference to Exhibits 10.1 to the Company's Current Report on Form 8-K filed August 27, 2014).
*10.41	Form of International Performance Based-Restricted Stock Units Agreement under the 2014 Equity and Incentive Compensation Plan (incorporated by reference to Exhibits 10.2 to the Company's Current Report on Form 8-K filed August 27, 2014).
*10.42	Form of International Time-Based Restricted Stock Units Agreement under the 2014 Equity and Incentive Compensation Plan (incorporated by reference to Exhibits 10.3 to the Company's Current Report on Form 8-K filed August 27, 2014).
*10.43	Form of U.S. Non-Qualified Stock Option Agreement under the 2014 Equity and Incentive Compensation Plan (incorporated by reference to Exhibits 10.4 to the Company's Current Report on Form 8-K filed August 27, 2014).
*10.44	Form of U.S. Performance-Based Restricted Stock Agreement under the 2014 Equity and Incentive Compensation Plan (incorporated by reference to Exhibits 10.5 to the Company's Current Report on Form 8-K filed August 27, 2014).
*10.45	Form of U.S. Time-Based Restricted Stock Units Agreement under the 2014 Equity and Incentive Compensation Plan (incorporated by reference to Exhibits 10.6 to the Company's Current Report on Form 8-K filed August 27, 2014).
*10.46	Form of US Performance Based Restricted Stock Unit under the 2014 Equity and Incentive Compensation Plan
21	List of Subsidiaries
23	Consent of Ernst & Young LLP
24	Powers of Attorney
31.1	Certification of Principal Executive Officer Pursuant to Rule 13a-14(a)
31.2	Certification of Principal Financial Officer Pursuant to Rule 13a-14(a)
32	Certification of Principal Executive Officer and Principal Financial Officer Pursuant to 18 U.S.C. 1350
101.1	Instance Document
101.2	Schema Document
101.3	Calculation Linkbase Document
101.4	Labels Linkbase Document
101.5	Presentation Linkbase Document
101.6	Definition Linkbase Document

_______________________________________

*	Indicates a management contract, executive compensation plan or arrangement.
+	Portions of Exhibit have been omitted and filed separately with the Securities and Exchange Commission in reliance on Rule 24b-2 and an Order from the Commission granting the Company’s request for confidential treatment dated June 26, 1998.
‡	These documents were filed as exhibits to the Company’s Form S-1 Registration Statement (Registration No. 33-60444) which became effective on October 12, 1993, and are incorporated herein by reference.

OM Group, Inc.

Schedule II — Valuation and Qualifying Accounts

Years Ended December 31, 2014, 2013 and 2012

	Balance at Beginning of Year		Acquisition / Divestitures				Charged (Credited) to Costs and Expenses			Charged (Credited) to Other Accounts				Deductions				Balance at End of Year
Classifications
2014
Allowance for doubtful accounts	$	3.9	—				$	0.3	(1)	$	(1.2	)	(9)	$	(0.5	)	(4)	$	2.5
Allowance for note receivable	19.1		—				—		(1)	(16.7		)	(8)	—				2.4
Environmental reserve	2.3		—				0.2		(3)	—				(0.7		)	(5)	1.8
	$	25.3	$	—			$	0.5		$	(17.9	)		$	(1.2	)		$	6.7
2013
Allowance for doubtful accounts	$	5.2	$	(1.0	)	(7)	$	0.2	(1)	$	(0.2	)	(6)	$	(0.3	)	(4)	$	3.9
Allowance for note receivable	3.1		—				16.0		(2)	—				—				19.1
Environmental reserve	2.4		—				0.3		(3)	—			(6)	(0.4		)	(5)	2.3
	$	10.7	$	(1.0	)		$	16.5		$	(0.2	)		$	(0.7	)		$	25.3
2012
Allowance for doubtful accounts	$	4.8	$	—			$	0.7	(1)	$	0.1		(6)	$	(0.4	)	(4)	$	5.2
Allowance for note receivable	3.1		—				—		(1)	—				—				3.1
Environmental reserve	2.6		—				0.3		(3)	—			(6)	(0.5		)	(5)	2.4
	$	10.5	$	—			$	1.0		$	0.1			$	(0.9	)		$	10.7

_______________________________________

(1) Provision for uncollectible accounts and notes receivable included in selling, general and administrative expenses.

(2) Note receivable fully reserved at time of sale of cobalt business on March 29, 2013.

(3) Provision for environmental costs included in selling, general and administrative expenses.

(4) Actual accounts written-off against the allowance.

(5) Actual cash expenditures charged against the accrual.

(6) Foreign currency translation adjustment.

(7) Resulting from sale of AM and UPC businesses during 2013.

(8) Relief of note receivable obligation in accordance with compliance on the cobalt supply agreement.

(9) Foreign currency translation adjustment and minor balance sheet reclassification.

Signatures

Pursuant to the requirements of Section 13 or 15(d) of the Securities Exchange Act of 1934, the Registrant has duly caused this Annual Report on Form 10-K to be signed on its behalf by the undersigned, thereunto duly authorized, on March 2, 2015.

OM GROUP, INC.

By:  /s/ Christopher M. Hix

Christopher M. Hix

Vice President and Chief Financial Officer

Pursuant to the requirements of the Securities Exchange Act of 1934, this Annual Report on Form 10-K has been signed below on March 2, 2015 by the following persons on behalf of the registrant and in the capacities indicated.

Signature	Title
/s/  Joseph Scaminace Joseph Scaminace	Chairman and Chief Executive Officer (Principal Executive Officer)
/s/  Christopher M. Hix Christopher M. Hix	Vice President and Chief Financial Officer (Principal Financial Officer)
/s/  Carol A. Benton Carol A. Benton	Corporate Controller (Principal Accounting Officer)
/s/  Hans-Georg Betz Hans-Georg Betz	Director
/s/  Richard W. Blackburn Richard W. Blackburn	Director
/s/  Carl R. Christenson Carl R. Christenson	Director
/s/  Steven J. Demetriou Steven J. Demetriou	Director
/s/  Patrick S. Mullin Patrick S. Mullin	Director
/s/  Katharine L. Plourde Katharine L. Plourde	Director
/s/  John A. McFarland John A. McFarland	Director
/s/  Christopher M. Hix Christopher M. Hix Attorney-in-Fact

37

EX-10.46

[Form - Performance-Based RSU Agreement][2015]

OM GROUP, INC.

PERFORMANCE-BASED RESTRICTED STOCK UNITS AGREEMENT

THIS PERFORMANCE-BASED RESTRICTED STOCK UNITS AGREEMENT (the “Agreement”), dated as of __________ ___, 201__, is by and between OM GROUP, INC. (the “Company”) and __________ (the “Participant”). All terms used in this Agreement with initial capital letters and not otherwise defined in this Agreement that are defined in the Company’s 2014 Equity and Incentive Compensation Plan (the “Plan”) shall have the meanings assigned to them in the Plan.

WHEREAS, the Company maintains the Plan for the purpose of attracting and retaining non-employee Directors, officers and other key executives and employee of the Company and its Subsidiaries and to provide to such persons incentives and rewards for performance;

WHEREAS, pursuant to the Plan, and subject to the terms and conditions thereof and the terms and conditions hereinafter set forth, this Agreement evidences and memorializes the Company’s grant to the Participant, effective as of __________ ___, 201__ (the “Date of Grant”) of __________ performance-based Restricted Stock Units (the “PRSUs”). Subject to the achievement of the Management Objectives described in Section 3 of this Agreement, the Participant may earn between 0% and ___% of the PRSUs.

NOW, THEREFORE, the Company and the Participant agree as follows:

1.Earning of PRSUs. If the PRSUs under this Agreement become nonforfeitable and payable (“Vest” or similar terms) in accordance with Section 3 of this Agreement, the Participant will be entitled to settlement of the Vested PRSUs as specified in Section 4 of this Agreement.

2.Transferability of PRSUs. Subject to Section 15 of the Plan, the rights of the Participant under this Agreement, the PRSUs (prior to settlement) and any interest therein or in any Common Stock underlying such PRSUs shall not be transferable other than by will or by the laws of descent and distribution. Upon any attempt to transfer, assign, pledge, hypothecate, or otherwise dispose of the PRSUs or any related rights to the PRSUs that is contrary to the provisions of this Agreement or the Plan, or upon the levy of any attachment or similar process upon the PRSUs or such rights, the PRSUs and such rights shall immediately become null and void.

3. Vesting of PRSUs.

3.1Normal Vesting. Subject to Sections 3.2 through 3.5 of this Agreement, the PRSUs will Vest (and become entitled to settlement as specified in Section 4 of this Agreement) based on the relative achievement of the Management Objective(s) approved by the Committee on the Date of Grant (the “Performance Targets”) for the performance period from January 1, 20___ through December 31, 20___ (the “Performance Period”) as follows:

(a)The applicable percentage of the PRSUs that shall be earned by the Participant for the Performance Period shall be determined by reference to the Performance Matrix for the Performance Period approved by the Committee on the Date of Grant and communicated to the Participant in writing (the “Performance Matrix”) if the Participant remains continuously employed by either the Company or any Subsidiary until the end of the Performance Period. For purposes of this Agreement, the continuous employment of the Participant with the Company or any Subsidiary will not be deemed to have been interrupted, and the Participant shall not be deemed to have ceased to be an employee of the Company or any Subsidiary, by reason of the transfer of the Participant’s employment among the Company and its Subsidiaries;

(b)In the event that achievement with respect to one of the Performance Targets is between the performance levels specified in the Performance Matrix, the applicable percentage of the PRSUs that shall be earned by the Participant for the Performance Period for that particular Performance Target shall be determined by the Committee using straight-line mathematical interpolation; and

(c)To the extent the Performance Targets are not achieved by the end of the Performance Period, then the PRSUs evidenced by this Agreement will be forfeited without compensation or other consideration. The Vesting of the PRSUs pursuant to this Section 3.1 shall be contingent upon a determination of the Committee that the Performance Metrics have been satisfied.

3.2Pro-Rata Vesting Due to Death or Becoming Disabled. If, prior to the end of the Performance Period, the Participant dies or becomes Disabled while in the employ of the Company or any Subsidiary, then, to the extent that the PRSUs have not previously been forfeited, a pro-rata number of the PRSUs shall remain eligible for Vesting after the end of the Performance Period (and become entitled to settlement as specified in Section 4 of this Agreement), with such pro-rata number of PRSUs being determined by multiplying (a) the number of PRSUs in which the Participant would have Vested in accordance with the terms and conditions of Section 3.1 if the Participant had remained in the continuous employment of the Company or any Subsidiary from the Date of Grant until the end of the Performance Period (or the occurrence of a Change in Control to the extent a Replacement Award is not provided) by (b) a fraction (i) the numerator of which is the total number of calendar days in the period commencing with the start of the Performance Period and ending on the date of such death or the date on which the Participant became Disabled and (ii) the denominator of which is the number of days in the Performance Period, with any fractional share rounded down to the nearest whole number. The balance of the PRSUs evidenced by this Agreement and not subject to pro-rata eligibility for Vesting under this Section 3.2 shall be immediately forfeited without compensation or other consideration. For purposes of this Agreement, the Participant shall be considered to have become “Disabled” if the Participant has qualified for a long-term disability benefit under a disability plan or program of the Company or, in the absence of a disability plan or program of the Company, under a government-sponsored disability program, and is “disabled” within the meaning of Section 409A(a)(2)(C) of the Code.

3.3Pro-Rata Vesting Due to Retirement. If the Participant ceases to be employed by the Company or any Subsidiary prior to the end of the Performance Period due to the Participant’s retirement in accordance with any retirement plan or policy of the Company or any Subsidiary (“Retirement”), then, to the extent that the PRSUs have not previously been forfeited, a pro-rata number of the PRSUs shall remain eligible for Vesting after the end of the Performance Period (and become entitled to settlement as specified in Section 4 of this Agreement), with such pro-rata number of PRSUs being determined by multiplying (a) the number of PRSUs in which the Participant would have Vested in accordance with the terms and conditions of Section 3.1 if the Participant had remained in the continuous employment of the Company or any Subsidiary from the Date of Grant until the end of the Performance Period (or the occurrence of a Change in Control to the extent a Replacement Award is not provided) by (b) a fraction (i) the numerator of which is the total number of calendar days in the period commencing with the start of the Performance Period and ending on the date of such Retirement and (ii) the denominator of which is the number of days in the Performance Period, with any fractional share rounded down to the nearest whole number. The balance of the PRSUs evidenced by this Agreement and not subject to pro-rata eligibility for Vesting under this Section 3.3 shall be immediately forfeited without compensation or other consideration.

3.4Accelerated Vesting in Connection with a Change in Control.

(a)Upon a Change in Control occurring after the Date of Grant but prior to the end of the Performance Period, if the Participant has been continuously employed by either the Company or any Subsidiary between the Date of Grant and the date of such Change in Control, to the extent that the PRSUs have not previously been forfeited, the PRSUs shall Vest in full at the target level (and become entitled to settlement as specified in Section 4 of this Agreement), except to the extent that a Replacement Award is provided to the Participant to replace, continue or adjust the outstanding PRSUs (the “Replaced Award”). If the Participant is provided with a Replacement Award in connection with the Change in Control, then if, upon or after receiving the Replacement Award, the Participant’s employment with the Company or any Subsidiary (or any of their successors after the Change in Control) (as applicable, the “Successor”) is terminated by the Participant for Good Reason or by the Successor other than for Cause (excluding, for the avoidance of doubt, termination due to the Participant's death, Disability, retirement or voluntary resignation), in each case within a period of two years after the Change in Control but prior to the end of the Performance Period, to the extent that the Replacement Award has not previously been forfeited, (i) the Replacement Award will Vest in full at the target level (and become entitled to settlement as specified in Section 4 of this Agreement).

(b)For purposes of this Agreement, a “Replacement Award” means an award (i) of the same type (i.e., performance-based restricted stock units) as the Replaced Award, (ii) that has a value at least equal to the value of the Replaced Award, (iii) that relates to publicly traded equity securities of the Successor in the Change in Control (or another entity that is affiliated with the Successor following the Change in Control), (iv) the tax consequences of which for such Participant under the Code, if the Participant is subject to U.S. federal income tax under the Code, are not less favorable to the Participant than the tax consequences of the Replaced Award, and (v) the other terms and conditions of which are not less favorable to the Participant than the terms and conditions of the Replaced Award (including the provisions that would apply in the event of a subsequent change in control). A Replacement Award may be granted only to the extent it does not result in the Replaced Award or Replacement Award failing to comply with or ceasing to be exempt from Section 409A of the Code, if applicable. Without limiting the generality of the foregoing, the Replacement Award may take the form of a continuation of the Replaced Award if the requirements of the preceding two sentences are satisfied. The determination of whether the conditions of this Section 3.4(b) are satisfied will be made in good faith by the Committee, as constituted immediately before the Change in Control, in its sole discretion.

(c)For purposes of this Agreement, “Cause” has the meaning set forth in the Participant’s employment, change in control, or severance agreement, as applicable (in that order), or otherwise means: (i) the Participant’s gross negligence or serious misconduct (including, without limitation, any criminal, fraudulent or dishonest conduct) that is or may be injurious to the Successor; or (ii) the Participant being convicted of, or entering a plea of nolo contendere to, any crime that constitutes a felony or involves moral turpitude; or (iii) the Participant’s breach of a written agreement between the Participant and the Successor; or (iv) the Participant’s willful and continued failure to perform the Participant’s duties on behalf of the Successor; or (v) the Participant’s material breach of a written policy of the Successor.

(d)For purposes of this Agreement, “Good Reason” means: (i) a material change in the geographic location at which the Participant must perform the Participant’s services (which shall in no event include a relocation of the Participant’s current principal place of business to a location less than 50 miles away) from the geographic location immediately prior to the Change of Control; (ii) a material diminution in the Participant’s base compensation from the level immediately prior to the Change of Control; or (iii) a material diminution in the Participant’s authority, duties, or responsibilities from the level immediately prior to the Change of Control; provided, however, that no termination shall be deemed to be for Good Reason unless (x) the Participant provides the Successor with written notice setting forth the specific facts or circumstances constituting Good Reason within ninety (90) days after the initial existence of the occurrence of such facts or circumstances, (y) the Successor has failed to cure such facts or circumstances within thirty (30) days of its receipt of such written notice, and (z) the effective date of the termination for Good Reason occurs no later than one hundred fifty (150) days after the initial existence of the facts or circumstances constituting Good Reason.

(e)If a Replacement Award is provided, notwithstanding anything in this Agreement or the Plan to the contrary, any outstanding PRSUs that at the time of the Change in Control are not subject to a “substantial risk of forfeiture” (within the meaning of Section 409A of the Code) will be deemed to be Vested at the time of such Change in Control and will be settled as provided for in Section 4 of this Agreement.

3.5Forfeiture Upon Other Terminations of Employment. Any PRSUs that have not Vested pursuant to Section 3 of this Agreement on or prior to the end of the Performance Period will be forfeited automatically and without further notice on such date without compensation or any other consideration (or earlier if, and on such date that, the Participant ceases to be an employee of the Company or any Subsidiary prior to the end of the Performance Period for any reason other than as described in Sections 3.2 through 3.4 of this Agreement).For purposes of this Section 3, the Participant shall have ceased to be employed by the Company or any Subsidiary when the Participant no longer has the right or obligation to perform services in such capacity, notwithstanding the continuation of any employment agreement for any other purpose or the continuation of compensation or benefits under any such employment agreement or otherwise.

4. Form and Time of Settlement of PRSUs.

4.1General. Subject to Sections 3.5 and 4.2 of this Agreement, settlement of the RSUs that have become Vested in accordance with Section 3 of this Agreement shall be made in the form of shares of Common Stock, such that one share of Common Stock shall be issued for each Vested PRSU between January 1 and March 15 of the calendar year immediately following the calendar year in which the Performance Period ends.

4.2Change in Control. Notwithstanding Section 4.1 of this Agreement, to the extent that the PRSUs are Vested on a Change in Control, upon a Change in Control, the Participant is entitled to receive payment for Vested PRSUs in the form of shares of Common Stock, such that one share of Common Stock shall be issued for each Vested PRSU on the date of the Change in Control; provided, however, that if such Change in Control would not qualify as a permissible date of distribution under Section 409A(a)(2)(A) of the Code, and the regulations thereunder, and where Section 409A of the Code applies to such distribution, the Participant is entitled to receive the corresponding payment on the date that would have otherwise applied pursuant to Sections 4.1 of this Agreement as though such Change in Control had not occurred.

5.Payment of Dividend Equivalents. From and after the Date of Grant and until the earlier of (a) the time when the PRSUs become Vested and are settled in accordance with Sections 3 and 4 of this Agreement or (b) the time when the Participant’s right to receive payment in settlement of the PRSUs is forfeited in accordance with Section 3 of this Agreement, on the date that the Company pays a cash dividend (if any) to holders of Common Stock generally, the Participant shall be entitled to a number of additional PRSUs determined by dividing (x) the product of (i) the dollar amount of the cash dividend paid per share of Common Stock on such date and (ii) the Participant’s maximum number of PRSUs (including dividend equivalents credited thereon) as of such date, by (y) the Market Value per Share of the Common Stock on such date.Such dividend equivalents (if any) shall be subject to the same terms and conditions and shall be paid, in the aggregate rounded down to the nearest whole number, or forfeited in the same manner and at the same time as the PRSUs to which the dividend equivalents were credited.

6.Tax Withholding. Subject to Section 16 of the Plan, to the extent that the Company is required to withhold federal, state, local or foreign taxes in connection with any payment made or benefit realized by the Participant or other person under the PRSUs, and the amounts available to the Company for such withholding are insufficient, it will be a condition to the receipt of such payment or the realization of such benefit that the Participant or such other person make arrangements satisfactory to the Company for payment of the balance of such taxes required to be withheld, which arrangements (in the discretion of the Committee) may include relinquishment of a portion of such benefit.

7.Adjustments. The Committee shall make or provide for such adjustments in the number of shares of Common Stock covered by the PRSUs and in the kind of shares covered by the PRSUs as the Committee, in its sole discretion, exercised in good faith, may determine is equitably required to prevent dilution or enlargement of the rights of the Participant that otherwise would result from (a) any stock dividend, stock split, combination of shares, recapitalization or other change in the capital structure of the Company, (b) any merger, consolidation, spin-off, split-off, spin-out, split-up, reorganization, partial or complete liquidation or other distribution of assets, issuance of rights or warrants to purchase securities, or (c) any other corporate transaction or event having an effect similar to any of the foregoing. Moreover, in the event of any such transaction or event or in the event of a Change in Control, the Committee, in its discretion, shall provide in substitution for the PRSUs such alternative consideration (including cash), if any, as it, in good faith, may determine to be equitable in the circumstances and may require in connection therewith the surrender of the PRSUs in a manner that complies with Section 409A of the Code. Any action taken by the Committee pursuant to this Section 7 will only be taken to the extent it does not result in the PRSUs failing to comply with or ceasing to be exempt from Section 409A of the Code.

8.Special Incentive Compensation. The Participant agrees that the award of the PRSUs is special incentive compensation and that it, any dividend equivalents paid thereon (even if treated as compensation for tax purposes) and any other property received on account of such PRSUs will not be taken into account as “salary” or “compensation” or “bonus” in determining the amount of any payment under any pension, retirement or profit-sharing plan of the Company or any life insurance, disability or other benefit plan of the Company.

9.Relationship to the Plan. This Agreement is subject to the terms of the Plan and any related administrative policies or procedures adopted by the Company. If there is any inconsistency between this Agreement and the Plan or any such administrative policies or procedures, the Plan and the policies or procedures, in that order, shall govern (except that, with respect to Sections 3.4 and 4 of this Agreement, the terms of this Agreement shall govern in the case of an inconsistency between Sections 3.4 or 4 of this Agreement and the Plan).

10.No Effect on Employment Relationship. This Agreement is not intended to have any effect upon the Participant’s employment relationship with the Company or any Subsidiary. Nothing in this Agreement shall interfere with or affect the rights of the Company or the Participant under any employment agreement or confer upon the Participant any right to continued employment with the Company or any Subsidiary.

11.Forfeiture upon Termination due to Violation of the Code of Conduct and Ethics. Notwithstanding any other provisions of this Agreement, if the Participant’s employment with the Company or any Subsidiary is terminated on account of a violation of the Company’s Code of Conduct and Ethics, the PRSUs will be forfeited upon such termination.

12.Binding Effect. Subject to the provisions of the Plan, this Agreement shall inure to the benefit of and be binding upon the Participant and the Company and their respective heirs, legal representatives, successors and assigns.

13.Amendments. Any amendment to the Plan shall be deemed to be an amendment to this Agreement to the extent that the amendment is applicable hereto; provided, however, that no amendment shall adversely affect the rights of the Participant under this Agreement without the Participant’s consent (provided, however, that the Participant’s consent shall not be required to an amendment that is deemed necessary by the Company to ensure compliance with Section 409A of the Code). No amendment, modification, waiver or release of or under this Agreement will be effective unless evidenced by an instrument in writing signed by each of the Company and the Participant.

14.Compliance with Law. The Company shall make reasonable efforts to comply with all applicable U.S. federal and state securities laws.

15.Compliance with Section 409A of the Code. To the extent applicable, it is intended that this Agreement and the Plan comply with the provisions of Section 409A of the Code, so that the income inclusion provisions of Section 409A(a)(1) of the Code do not apply to the Participant. This Agreement and the Plan shall be interpreted in a manner consistent with this intent. Reference to Section 409A of the Code is to Section 409A of the Internal Revenue Code of 1986, as amended, and will also include any proposed, temporary or final regulations, or any other guidance promulgated with respect to such Section by the U.S. Department of the Treasury or the Internal Revenue Service.

16.Severability. If any provision of this Agreement or the application of any provision hereof to any person or circumstances is held invalid, unenforceable or otherwise illegal, the remainder of this Agreement and the application of such provision to any other person or circumstances shall not be affected, and the provisions so held to be invalid, unenforceable or otherwise illegal shall be reformed to the extent (and only to the extent) necessary to make it enforceable, valid and legal.

17.Electronic Delivery. The Company may, in its sole discretion, deliver any documents related to the PRSUs and the Participant’s participation in the Plan, or future awards that may be granted under the Plan, by electronic means or to request the Participant’s consent to participate in the Plan by electronic means. The Participant hereby consents to receive such documents by electronic delivery and, if requested, agrees to participate in the Plan through an on-line or electronic system established and maintained by the Company or another third party designated by the Company.

[SIGNATURES ON NEXT PAGE]

IN WITNESS WHEREOF, the parties have executed this Agreement as of the date first above written.

PARTICIPANTOM GROUP, INC.

By:		By:
	[NAME]		[NAME]
		Title:	[TITLE]

EX-21

	Exhibit 21
NAME OF SUBSIDIARY	JURISDICTION OF ORGANIZATION
Borchers Additives LLC	Ohio
Compugraphics International Limited	United Kingdom
Compugraphics Jena GmbH	Germany
Compugraphics U.S.A. Inc.	Delaware
Diehl & EaglePicher GmbH (45%)	Germany
EaglePicher Energy Products ULC	Canada
EaglePicher Medical Power, LLC	Delaware
EaglePicher Technologies, LLC	Delaware
EPEP Holding Company, LLC	Delaware
Harko CV	Netherlands
Neorem Magnets Ningbo Co. Ltd.	China
Neorem Magnets Oy	Finland
OM Group Corporate, LLC	Delaware
OM Group Electronic Chemicals UK, Ltd.	UK
OM Group (Suzhou) Electronic Chemicals Co., Ltd.	China
OMG (Asia) Electronic Chemicals Co., Ltd.	Taiwan
OMG (Shanghai) Trading Co., Ltd.	China
OMG Additives Ltd.	United Kingdom
OMG Americas, Inc.	Ohio
OMG Belleville Limited	Ontario
OMG Borchers GmbH	Germany
OMG Borchers sas	France
OMG Chemicals and Magnetics Private Limited	India
OMG Electronic Chemicals (M) Sdn Bhd	Malaysia
OMG Electronic Chemicals Pte. Ltd.	Singapore
OMG Electronic Chemicals, LLC	Delaware
OMG Energy Holdings, Inc.	Delaware
OMG Finland Oy	Finland
OMG France SARL	France
OMG Germany Holding GmbH	Germany
OMG Germany Subsidiary Holding GmbH	Germany
OMG Harjavalta Chemicals Holding BV	Netherlands
OMG Harko Holdings, LLC	Delaware
OMG Kokkola Chemicals Holding (Two) BV	Netherlands
OMG UK Technology Limited	United Kingdom
SANVAC (Beijing) Magnetics Co., LTD (49%)	China
VAC Beteiligungs-GmbH	Germany
VAC Finanzierung GmbH	Germany
VAC Germany GmbH	Germany
VAC International Holding GmbH	Germany
VAC Magnetic France S.a.r.l	France
VAC Magnetic Japan K.K.	Japan

VAC Magnetic Korea Yuhan Hoesa	Korea
VAC Netherlands B.V.	Netherlands
VAC Participation GmbH	Germany
VAC Sales USA LLC	Delaware
Vacuumschmelze (Malaysia) Sdn. Bhd.	Malaysia
Vacuumschmelze China Magnetics (Shenyang) Co., Ltd.	China
Vacuumschmelze GmbH & Co. KG	Germany
Vacuumschmelze Singapore Pte. Ltd.	Singapore
Vacuumschmelze, s.r.o.	Slovakia

EX-23

Exhibit 23

Consent of Independent Registered Public Accounting Firm

We consent to the incorporation by reference in the following Registration Statements of our reports dated March 2, 2015, with respect to the consolidated financial statements and schedule of OM Group, Inc. and subsidiaries, and the effectiveness of internal control over financial reporting of OM Group, Inc. and subsidiaries included in this Annual Report (Form 10-K) for the year ended December 31, 2014:

Registration Statement	Description	Filing Date
333-47230	OM Group, Inc. 1998 Long-Term Incentive Compensation Plan-Form S-8 Registration Statement-2,000,000 Shares	October 3, 2000
333-65852	OM Group, Inc. 1998 Long-Term Incentive Compensation Plan-Form S-8 Registration Statement-2,000,000 Shares	July 25, 2001
333-141033	OM Group, Inc. 2002 Stock Incentive Plan and Inducement Stock Option Grant to Joseph M. Scaminace-Form S-8 Registration Statement-1,488,934 Shares	March 2, 2007
333-145238	OM Group, Inc. 2007 Incentive Compensation Plan-Form S-8 Registration Statement -3,000,000 Shares	August 8, 2007
333-07531	OM Group, Inc. Deregistration of 1996 Non-Employee Director's Equity Compensation Plan -Form S-8 - 250,000 shares	April 28, 2014
333-197835	OM Group, Inc. 2014 Equity and Incentive Compensation Plan - Form S-8 Registration Statement - 2,550,000 shares	August 4, 2014

/s/ Ernst & Young LLP

Cleveland, Ohio

March 2, 2015

EX-24

Exhibit 24

POWER OF ATTORNEY

The undersigned director of OM Group, Inc. (the “Company”), a Delaware corporation, which anticipates filing with the Securities and Exchange Commission, Washington, D.C., under the provisions of the Securities Exchange Act of 1934, as amended, an Annual Report on Form 10-K for the Company's fiscal year ended December 31, 2014, hereby constitutes and appoints JOSEPH SCAMINACE and CHRISTOPHER M. HIX, with full power of substitution and resubstitution, as attorney to sign for the undersigned and in his or her name, place and stead, as director of said Company, said Annual Report and any and all amendments and exhibits thereto, and any and all applications and documents to be filed with the Securities and Exchange Commission pertaining to such Annual Report, with full power and authority to do and perform any and all acts and things whatsoever requisite, necessary or advisable to be done in the premises, as fully and for all intents and purposes as the undersigned could do if personally present, hereby approving the acts of said attorney and any such substitute.

IN WITNESS WHEREOF, this Power of Attorney has been signed this 2nd day of March, 2015.

/s/ Richard W. Blackburn

Richard W. Blackburn

POWER OF ATTORNEY

The undersigned director of OM Group, Inc. (the “Company”), a Delaware corporation, which anticipates filing with the Securities and Exchange Commission, Washington, D.C., under the provisions of the Securities Exchange Act of 1934, as amended, an Annual Report on Form 10-K for the Company's fiscal year ended December 31, 2014, hereby constitutes and appoints JOSEPH SCAMINACE and CHRISTOPHER M. HIX, with full power of substitution and resubstitution, as attorney to sign for the undersigned and in his or her name, place and stead, as director of said Company, said Annual Report and any and all amendments and exhibits thereto, and any and all applications and documents to be filed with the Securities and Exchange Commission pertaining to such Annual Report, with full power and authority to do and perform any and all acts and things whatsoever requisite, necessary or advisable to be done in the premises, as fully and for all intents and purposes as the undersigned could do if personally present, hereby approving the acts of said attorney and any such substitute.

IN WITNESS WHEREOF, this Power of Attorney has been signed this 2nd day of March, 2015.

/s/ Steven J. Demetriou

Steven J. Demetriou

POWER OF ATTORNEY

The undersigned director of OM Group, Inc. (the “Company”), a Delaware corporation, which anticipates filing with the Securities and Exchange Commission, Washington, D.C., under the provisions of the Securities Exchange Act of 1934, as amended, an Annual Report on Form 10-K for the Company's fiscal year ended December 31, 2014, hereby constitutes and appoints JOSEPH SCAMINACE and CHRISTOPHER M. HIX, with full power of substitution and resubstitution, as attorney to sign for the undersigned and in his or her name, place and stead, as director of said Company, said Annual Report and any and all amendments and exhibits thereto, and any and all applications and documents to be filed with the Securities and Exchange Commission pertaining to such Annual Report, with full power and authority to do and perform any and all acts and things whatsoever requisite, necessary or advisable to be done in the premises, as fully and for all intents and purposes as the undersigned could do if personally present, hereby approving the acts of said attorney and any such substitute.

IN WITNESS WHEREOF, this Power of Attorney has been signed this 2nd day of March, 2015.

/s/ Katharine L. Plourde

Katharine L. Plourde

POWER OF ATTORNEY

The undersigned director of OM Group, Inc. (the “Company”), a Delaware corporation, which anticipates filing with the Securities and Exchange Commission, Washington, D.C., under the provisions of the Securities Exchange Act of 1934, as amended, an Annual Report on Form 10-K for the Company's fiscal year ended December 31, 2014, hereby constitutes and appoints JOSEPH SCAMINACE and CHRISTOPHER M. HIX, with full power of substitution and resubstitution, as attorney to sign for the undersigned and in his or her name, place and stead, as director of said Company, said Annual Report and any and all amendments and exhibits thereto, and any and all applications and documents to be filed with the Securities and Exchange Commission pertaining to such Annual Report, with full power and authority to do and perform any and all acts and things whatsoever requisite, necessary or advisable to be done in the premises, as fully and for all intents and purposes as the undersigned could do if personally present, hereby approving the acts of said attorney and any such substitute.

IN WITNESS WHEREOF, this Power of Attorney has been signed this 2nd day of March, 2015.

/s/ John A. McFarland

John A. McFarland

POWER OF ATTORNEY

The undersigned director of OM Group, Inc. (the “Company”), a Delaware corporation, which anticipates filing with the Securities and Exchange Commission, Washington, D.C., under the provisions of the Securities Exchange Act of 1934, as amended, an Annual Report on Form 10-K for the Company's fiscal year ended December 31, 2014, hereby constitutes and appoints JOSEPH SCAMINACE and CHRISTOPHER M. HIX, with full power of substitution and resubstitution, as attorney to sign for the undersigned and in his or her name, place and stead, as director of said Company, said Annual Report and any and all amendments and exhibits thereto, and any and all applications and documents to be filed with the Securities and Exchange Commission pertaining to such Annual Report, with full power and authority to do and perform any and all acts and things whatsoever requisite, necessary or advisable to be done in the premises, as fully and for all intents and purposes as the undersigned could do if personally present, hereby approving the acts of said attorney and any such substitute.

IN WITNESS WHEREOF, this Power of Attorney has been signed this 2nd day of March, 2015.

/s/ Patrick S. Mullin

Patrick S. Mullin

POWER OF ATTORNEY

The undersigned director of OM Group, Inc. (the “Company”), a Delaware corporation, which anticipates filing with the Securities and Exchange Commission, Washington, D.C., under the provisions of the Securities Exchange Act of 1934, as amended, an Annual Report on Form 10-K for the Company's fiscal year ended December 31, 2014, hereby constitutes and appoints JOSEPH SCAMINACE and CHRISTOPHER M. HIX, with full power of substitution and resubstitution, as attorney to sign for the undersigned and in his or her name, place and stead, as director of said Company, said Annual Report and any and all amendments and exhibits thereto, and any and all applications and documents to be filed with the Securities and Exchange Commission pertaining to such Annual Report, with full power and authority to do and perform any and all acts and things whatsoever requisite, necessary or advisable to be done in the premises, as fully and for all intents and purposes as the undersigned could do if personally present, hereby approving the acts of said attorney and any such substitute.

IN WITNESS WHEREOF, this Power of Attorney has been signed this 2nd day of March, 2015.

/s/ Hans-Georg Betz

Hans-Georg Betz

POWER OF ATTORNEY

The undersigned director of OM Group, Inc. (the “Company”), a Delaware corporation, which anticipates filing with the Securities and Exchange Commission, Washington, D.C., under the provisions of the Securities Exchange Act of 1934, as amended, an Annual Report on Form 10-K for the Company's fiscal year ended December 31, 2014, hereby constitutes and appoints JOSEPH SCAMINACE and CHRISTOPHER M. HIX, with full power of substitution and resubstitution, as attorney to sign for the undersigned and in his or her name, place and stead, as director of said Company, said Annual Report and any and all amendments and exhibits thereto, and any and all applications and documents to be filed with the Securities and Exchange Commission pertaining to such Annual Report, with full power and authority to do and perform any and all acts and things whatsoever requisite, necessary or advisable to be done in the premises, as fully and for all intents and purposes as the undersigned could do if personally present, hereby approving the acts of said attorney and any such substitute.

IN WITNESS WHEREOF, this Power of Attorney has been signed this 2nd day of March, 2015.

/s/ Carl R. Christenson

Carl R. Christenson

EX-31.1

Exhibit 31.1

CERTIFICATION

I, Joseph Scaminace, certify that:

1. I have reviewed this Annual Report on Form 10-K of OM Group, Inc. (the "Registrant");

2. Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstances under which such statements were made, not misleading with respect to the period covered by this report;

3. Based on my knowledge, the financial statements, and other financial information included in this report, fairly present in all material respects the financial condition, results of operations and cash flows of the Registrant as of, and for, the periods presented in this report;

4. The Registrant's other certifying officer(s) and I are responsible for establishing and maintaining disclosure controls and procedures (as defined in Exchange Act Rules 13a-15(e) and 15d-15(e)) and internal control over financial reporting (as defined in Exchange Act Rules 13a-15(f) and 15d-15(f)) for the Registrant and have:

a) Designed such disclosure controls and procedures, or caused such disclosure controls and procedures to be designed under our supervision, to ensure that material information relating to the Registrant, including its consolidated subsidiaries, is made known to us by others within those entities, particularly during the period in which this report is being prepared;

b) Designed such internal control over financial reporting, or caused such internal control over financial reporting to be designed under our supervision, to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with generally accepted accounting principles;

c) Evaluated the effectiveness of the Registrant's disclosure controls and procedures and presented in this report our conclusions about the effectiveness of the disclosure controls and procedures, as of the end of the period covered by this report based on such evaluation; and

d) Disclosed in this report any change in the Registrant's internal control over financial reporting that occurred during the Registrant's most recent fiscal quarter (the Registrant's fourth fiscal quarter in the case of an annual report) that has materially affected, or is reasonably likely to materially affect, the Registrant's internal control over financial reporting; and

5. The Registrant's other certifying officers and I have disclosed, based on our most recent evaluation of internal control over financial reporting, to the Registrant's auditors and the audit committee of Registrant's board of directors (or persons performing the equivalent functions):

a) all significant deficiencies and material weaknesses in the design or operation of internal control over financial reporting which are reasonably likely to adversely affect the Registrant's ability to record, process, summarize and report financial information; and

b) any fraud, whether or not material, that involves management or other employees who have a significant role in the Registrant's internal control over financial reporting.

Date: March 2, 2015 /s/Joseph Scaminace Joseph Scaminace Chairman of the Board and Chief Executive Officer

EX-32

Exhibit 31.2

CERTIFICATION

I, Christopher M. Hix, certify that:

1. I have reviewed this Annual Report on Form 10-K of OM Group, Inc. (the "Registrant");

2. Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstances under which such statements were made, not misleading with respect to the period covered by this report;

3. Based on my knowledge, the financial statements, and other financial information included in this report, fairly present in all material respects the financial condition, results of operations and cash flows of the Registrant as of, and for, the periods presented in this report;

4. The Registrant's other certifying officer(s) and I are responsible for establishing and maintaining disclosure controls and procedures (as defined in Exchange Act Rules 13a-15(e) and 15d-15(e)) and internal control over financial reporting (as defined in Exchange Act Rules 13a-15(f) and 15d-15(f)) for the Registrant and have:

a) Designed such disclosure controls and procedures, or caused such disclosure controls and procedures to be designed under our supervision, to ensure that material information relating to the Registrant, including its consolidated subsidiaries, is made known to us by others within those entities, particularly during the period in which this report is being prepared;

b) Designed such internal control over financial reporting, or caused such internal control over financial reporting to be designed under our supervision, to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with generally accepted accounting principles;

c) Evaluated the effectiveness of the Registrant's disclosure controls and procedures and presented in this report our conclusions about the effectiveness of the disclosure controls and procedures, as of the end of the period covered by this report based on such evaluation; and

d) Disclosed in this report any change in the Registrant's internal control over financial reporting that occurred during the Registrant's most recent fiscal quarter (the Registrant's fourth fiscal quarter in the case of an annual report) that has materially affected, or is reasonably likely to materially affect, the Registrant's internal control over financial reporting; and

5. The Registrant's other certifying officers and I have disclosed, based on our most recent evaluation of internal control over financial reporting, to the Registrant's auditors and the audit committee of Registrant's board of directors (or persons performing the equivalent functions):

a) all significant deficiencies and material weaknesses in the design or operation of internal control over financial reporting which are reasonably likely to adversely affect the Registrant's ability to record, process, summarize and report financial information; and

b) any fraud, whether or not material, that involves management or other employees who have a significant role in the Registrant's internal control over financial reporting.

Date: March 2, 2015 /s/Christopher M. Hix Christopher M. Hix Vice President and Chief Financial Officer

EX-32.1

Exhibit 32

CERTIFICATION PURSUANT TO 18 U.S.C. SEC. 1350, AS ADOPTED PURSUANT TO

SEC. 906 OF THE SARBANES-OXLEY ACT OF 2002

In connection with the filing with the Securities and Exchange Commission of the Annual Report on Form 10-K of OM Group, Inc. (the "Company") for the year ended December 31, 2014 (the "Report"), each of the undersigned officers of the Company certifies, pursuant to 18 U.S.C. Sec. 1350, as adopted pursuant to Sec. 906 of the Sarbanes-Oxley Act of 2002, that:

(1) The Report fully complies with the requirements of Section 13(a) or 15(d) of the Securities Exchange Act of 1934, as amended; and

(2) The information contained in the Report fairly presents, in all material respects, the financial condition and results of operations of the Company.

Dated: March 2, 2015	/s/Joseph Scaminace Joseph Scaminace Chairman of the Board and Chief Executive Officer
	/s/Christopher M. Hix Christopher M. Hix Vice President and Chief Financial Officer

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Earnings Per Share (Tables)

12 Months Ended

Dec. 31, 2014

Earnings Per Share [Abstract]

Computation of Basic And Diluted Income Per Common Share From Continuing Operations

The following table sets forth the computation of basic and dilutive loss per common share from continuing operations attributable to OM Group, Inc. common stockholders for the years ended December 31:

	2014			2013			2012
Amounts attributable to OM Group, Inc. common stockholders:
(in millions, except per share amounts)
Loss from continuing operations, net of tax	$	(172.3	)	$	(71.7	)	$	(38.3	)
Loss per common share - basic:
Loss from continuing operations	$	(5.54	)	$	(2.27	)	$	(1.21	)
Loss per common share - assuming dilution:
Loss from continuing operations	$	(5.54	)	$	(2.27	)	$	(1.21	)
Weighted average shares outstanding — basic	31.1			31.6			31.9
Dilutive effect of stock options and restricted stock	—			—			—
Weighted average shares outstanding — assuming dilution	31.1			31.6			31.9

Computation of Basic And Diluted Net Income Per Common Share

The following table sets forth the computation of basic and diluted net loss per common share attributable to OM Group, Inc. common stockholders for the years ended December 31:

	2014			2013			2012
Amounts attributable to OM Group, Inc. common stockholders:
(in millions, except per share amounts)
Net loss	$	(172.6	)	(84.0		)	$	(38.7	)
Loss per common share - basic:
Net loss	$	(5.55	)	$	(2.66	)	$	(1.22	)
Loss per common share - assuming dilution:
Net loss	$	(5.55	)	$	(2.66	)	$	(1.22	)
Weighted average shares outstanding — basic	31.1			31.6			31.9
Dilutive effect of stock options and restricted stock	—			—			—
Weighted average shares outstanding — assuming dilution	31.1			31.6			31.9

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Derivative Instruments (Narrative) (Details) (USD $)	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013 contract	Dec. 31, 2012 contract
Euro Forward Contracts [Member]
Derivatives, Fair Value [Line Items]
Number of derivatives held		0	0
Hedge ineffectiveness recorded to income		$ 0	$ 0
Derivative instruments maturity range, months	12 months
Interest Rate Swap Agreements [Member]
Derivatives, Fair Value [Line Items]
Cash flow hedges loss expected to be reclassified to earnings			(100,000)
Hedge ineffectiveness recorded to income	0	0	0
Derivative instruments maturity range, months	12 months
Cash Flow Hedging [Member] | Interest Rate Swap Agreements [Member]
Derivatives, Fair Value [Line Items]
Derivative notional amount			$ 114,500,000

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Property, Plant and Equipment, net (Narrative) (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Property, Plant and Equipment [Abstract]
Depreciation expense	$ 42.5	$ 47.7	$ 58.7

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Pension and Other Post-Retirement Benefit Plans (Schedule of Weighted-Average Assumptions Used) (Details)	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013
U.S. Pension Plans [Member]
Weighted-average assumptions were used to determine benefit obligations:
Rate of increases in compensation	3.50%	3.50%
EPT Pension Plans [Member] | Active Plans [Member]
Weighted-average assumptions were used to determine benefit obligations:
Discount rate	3.70%	4.60%
Expected return on pension plan assets	6.30%	6.50%
Weighted-average assumptions were used to determine net periodic benefit costs:
Discount rate	4.60%	3.70%
Expected return on pension plan assets	6.50%	7.00%
EPT Pension Plans [Member] | Inactive Plans [Member]
Weighted-average assumptions were used to determine benefit obligations:
Discount rate	3.50%	4.40%
Expected return on pension plan assets	6.30%	6.50%
Weighted-average assumptions were used to determine net periodic benefit costs:
Discount rate	4.40%	3.50%
Expected return on pension plan assets	6.50%	4.70%
Divested Business Plans [Member]
Weighted-average assumptions were used to determine benefit obligations:
Discount rate	3.50%	4.30%
Expected return on pension plan assets	6.30%	6.50%
Weighted-average assumptions were used to determine net periodic benefit costs:
Discount rate	4.30%	3.40%
Expected return on pension plan assets	6.50%	6.00%
Non-U.S. Pension Plans [Member]
Weighted-average assumptions were used to determine benefit obligations:
Discount rate	2.00%	3.50%
Weighted-average assumptions were used to determine net periodic benefit costs:
Discount rate	3.50%	3.50%
Expected return on pension plan assets	3.50%	3.70%
Non-U.S. Pension Plans [Member] | Minimum [Member]
Weighted-average assumptions were used to determine benefit obligations:
Rate of increases in compensation	2.50%	3.00%
Non-U.S. Pension Plans [Member] | Maximum [Member]
Weighted-average assumptions were used to determine benefit obligations:
Rate of increases in compensation	2.50%	3.00%

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Derivative Instruments (Effect of Derivative Instruments) (Details) (Derivatives Designated As Hedging Instruments [Member], Cash Flow Hedging [Member], USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Derivative Instruments, Gain (Loss) [Line Items]
Amount of gain (loss) on derivative recognized in AOCI(L) (effective portion)	$ 0	$ (0.3)	$ 5.9
Amount of gain (loss) reclassified from AOCI(L) into income (effective portion)	(0.2)	(0.2)	1.9
Euro Forward Contracts [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Amount of gain (loss) on derivative recognized in AOCI(L) (effective portion)	0	0	6.0
Euro Forward Contracts [Member] | Cost of products sold [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Amount of gain (loss) reclassified from AOCI(L) into income (effective portion)	0	0	2.3
Commodity Contracts [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Amount of gain (loss) on derivative recognized in AOCI(L) (effective portion)	0	(0.3)	0
Commodity Contracts [Member] | Cost of products sold [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Amount of gain (loss) reclassified from AOCI(L) into income (effective portion)	(0.2)	(0.2)	0
Interest Rate Swap Agreements [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Amount of gain (loss) on derivative recognized in AOCI(L) (effective portion)	0	0	(0.1)
Interest Rate Swap Agreements [Member] | Interest Expense [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Amount of gain (loss) reclassified from AOCI(L) into income (effective portion)	$ 0	$ 0	$ (0.4)

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Share-Based Compensation (Summary of Share-Based Compensation Expense) (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Employees [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based compensation expense	$ 7.1	$ 5.7	$ 5.2
Employees [Member] | Stock Options and Restricted Stock Awards [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based compensation expense	6.5	5.4	5.0
Employees [Member] | Restricted Stock Units (RSUs) [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based compensation expense	0.6	0.3	0.2
Non-Employee Directors [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based compensation expense	$ 0.5	$ 0.5	$ 0.5

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Inventories (Schedule of Inventories) (Details) (USD $) In Millions, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013
Inventory, Net [Abstract]
Raw materials and supplies	$ 73.6	$ 83.3
Work-in-process	118.1	122.2
Finished goods	36.7	35.4
Inventories, total	$ 228.4	$ 240.9

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Goodwill and Other Intangible Assets (Tables)

12 Months Ended

Dec. 31, 2014

Goodwill and Intangible Assets Disclosure [Abstract]

Change in the carrying amount of goodwill

The change in the carrying amount of goodwill is as follows:

	Magnetic Technologies			Advanced Materials			Specialty Chemicals			Battery Technologies			Continuing Operations			Discontinued Operations			Consolidated
Balance at January 1, 2013	$	205.2		$	103.3		$	154.4		$	65.4		$	528.4		$	15.0		$	543.4
Divestitures and adjustments	—			(103.3		)	—			—			(103.3		)	(15.0		)	(118.3		)
Foreign currency translation adjustments	9.3			—			(1.3		)	(0.3		)	7.7			—			7.7
Balance at December 31, 2013	214.5			—			153.1			65.1			432.7			—			432.7
Impairment	(168.7		)	—			—			—			(168.7		)	—			(168.7		)
Acquisition	—			—			—			14.5			14.5			—			14.5
Foreign currency translation adjustments	(19.3		)	—			(6.3		)	(0.3		)	(25.9		)	—			(25.9		)
Balance at December 31, 2014	$	26.5		$	—		$	146.8		$	79.3		$	252.6		$	—		$	252.6

Summary of intangible assets

A summary of intangible assets follows:

	2014										2013
	Carrying Value		Accumulated Amortization (a)			Impairment			Net		Carrying Value		Accumulated Amortization (a)			Net
Tradenames	$	114.1	$	(9.6	)	$	(26.7	)	$	77.8	$	117.0	$	(2.9	)	$	114.1
Customer relationships	218.2		(90.1		)	—			128.1		234.5		(82.4		)	152.1
Developed technology	135.5		(36.1		)	—			99.4		136.5		(19.9		)	116.6
Know-how	20.1		(4.6		)	—			15.5		18.6		(3.6		)	15.0
Capitalized software	22.3		(18.6		)	—			3.7		22.0		(17.4		)	4.6
Other intangibles	2.9		(2.6		)	—			0.3		4.2		(3.6		)	0.6
Total	$	513.1	$	(161.6	)	$	(26.7	)	$	324.8	$	532.8	$	(129.8	)	$	403.0

(a) - Actual amounts of amortization expense may differ from the estimated amounts due to changes in foreign currency exchange rates, impairment of intangible assets, intangible assets additions, accelerated amortization of intangible assets, acquisitions and divestitures and other factors.

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Share-Based Compensation (Stock Options Valuation Assumptions) (Details) (USD $)	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Share-based Compensation [Abstract]
Risk-free interest rate	1.90%	1.10%	1.10%
Dividend yield	0.94%	0.00%	0.00%
Volatility factor of Company common stock	56.00%	54.00%	55.00%
Weighted-average expected option term	6 years	6 years	6 years
Weighted-average grant-date fair value	$ 15.03	$ 13.49	$ 15.29

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Accumulated Other Comprehensive Income (Loss) (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Accumulated Other Comprehensive Income [Roll Forward]
Balance at beginning of period	$ (45.2)
Other comprehensive (loss) income before reclassifications	(118.0)
Amounts reclassified from accumulated other comprehensive income (loss)	5.4
Net change in accumulated other comprehensive income (loss)	(112.6)	42.8	5.4
Balance at end of period	(157.8)	(45.2)
Foreign Currency Translation [Member]
Accumulated Other Comprehensive Income [Roll Forward]
Balance at beginning of period	(5.5)
Other comprehensive (loss) income before reclassifications	(81.7)
Amounts reclassified from accumulated other comprehensive income (loss)	0
Net change in accumulated other comprehensive income (loss)	(81.7)
Balance at end of period	(87.2)
Unrealized Gains and Losses on Cash Flow Hedging Derivatives [Member]
Accumulated Other Comprehensive Income [Roll Forward]
Balance at beginning of period	(0.2)
Other comprehensive (loss) income before reclassifications	0
Amounts reclassified from accumulated other comprehensive income (loss)	0.2
Net change in accumulated other comprehensive income (loss)	0.2
Balance at end of period	0
Unrealized Gains and Losses on Cash Flow Hedging Derivatives [Member] | Reclassification out of Accumulated Other Comprehensive Income [Member]
Accumulated Other Comprehensive Income [Roll Forward]
Cost of goods sold	0.2
Pension and Post-Retirement Obligation [Member]
Accumulated Other Comprehensive Income [Roll Forward]
Balance at beginning of period	(49.1)
Other comprehensive (loss) income before reclassifications	(42.0)
Amounts reclassified from accumulated other comprehensive income (loss)	5.2
Net change in accumulated other comprehensive income (loss)	(36.8)
Balance at end of period	(85.9)
Deferred Tax Asset [Domain]
Accumulated Other Comprehensive Income [Roll Forward]
Balance at beginning of period	9.6
Other comprehensive (loss) income before reclassifications	5.7
Amounts reclassified from accumulated other comprehensive income (loss)	0
Net change in accumulated other comprehensive income (loss)	5.7
Balance at end of period	$ 15.3

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Schedule II - Valuation and Qualifying Accounts (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2014		Dec. 31, 2013		Dec. 31, 2012
Movement in Valuation Allowances and Reserves [Roll Forward]
Balance at Beginning of Year	$ 25.3		$ 10.7		$ 10.5
Acquisitions/Divestitures	0		(1.0)		0
Charged (Credited) to Costs and Expenses	0.5		16.5		1.0
Charged (Credited) to Other Accounts	(17.9)		(0.2)		0.1
Deductions	(1.2)		(0.7)		(0.9)
Balance at End of Year	6.7		25.3		10.7
Allowance for doubtful accounts [Member]
Movement in Valuation Allowances and Reserves [Roll Forward]
Balance at Beginning of Year	3.9		5.2		4.8
Acquisitions/Divestitures	0	[1]	(1.0)	[1]	0
Charged (Credited) to Costs and Expenses	0.3	[2]	0.2	[2]	0.7	[2]
Charged (Credited) to Other Accounts	(1.2)	[3]	(0.2)	[4]	0.1	[4]
Deductions	(0.5)	[5]	(0.3)	[5]	(0.4)	[5]
Balance at End of Year	2.5		3.9		5.2
Allowance for note receivable [Member]
Movement in Valuation Allowances and Reserves [Roll Forward]
Balance at Beginning of Year	19.1		3.1		3.1
Acquisitions/Divestitures	0		0		0
Charged (Credited) to Costs and Expenses	0	[2]	16.0	[6]	0	[2]
Charged (Credited) to Other Accounts	(16.7)	[7]	0		0
Deductions	0		0		0
Balance at End of Year	2.4		19.1		3.1
Environmental reserve [Member]
Movement in Valuation Allowances and Reserves [Roll Forward]
Balance at Beginning of Year	2.3		2.4		2.6
Acquisitions/Divestitures	0		0		0
Charged (Credited) to Costs and Expenses	0.2	[8]	0.3	[8]	0.3	[8]
Charged (Credited) to Other Accounts	0		0	[4]	0	[4]
Deductions	(0.7)	[9]	(0.4)	[9]	(0.5)	[9]
Balance at End of Year	$ 1.8		$ 2.3		$ 2.4

[1] Resulting from sale of AM and UPC businesses during 2013.

[2] Provision for uncollectible accounts and notes receivable included in selling, general and administrative expenses.

[3] Foreign currency translation adjustment and minor balance sheet reclassification.

[4] Foreign currency translation adjustment.

[5] Actual accounts written-off against the allowance.

[6] Note receivable fully reserved at time of sale of cobalt business on March 29, 2013.

[7] Relief of note receivable obligation in accordance with compliance on the cobalt supply agreement.

[8] Provision for environmental costs included in selling, general and administrative expenses.

[9] Actual cash expenditures charged against the accrual.

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Fair Value Disclosures - Schedule of changes in Level 3 liabilities measure at fair value on a recurring basis (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2014
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Fair value, beginning of period	$ 1.4
Accretion expense	0.2
Foreign exchange	(0.2)
Fair value, end of period	$ 1.4

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Earnings Per Share (Non-Vested Share-Based Compensation Awards That Could Potentially Dilute Earnings Per Share) (Details) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013
Earnings Per Share [Abstract]
Non-vested share-based compensation awards not included in the fully diluted computation	0.1	0.1

XML

Reportable Segments and Geographic Information (Schedule of Geographic Information) (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended										12 Months Ended
	Dec. 31, 2014		Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2013		Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2014		Dec. 31, 2013		Dec. 31, 2012
Segment Reporting Information [Line Items]
Net sales	$ 245.4		$ 262.9	$ 297.5	$ 261.7	$ 270.5		$ 265.7	$ 279.5	$ 341.8	$ 1,067.5	[1],[2]	$ 1,157.5	[1],[2]	$ 1,544.4	[1],[2]
Long-lived assets	308.3	[2],[3]				345.6	[2],[3]				308.3	[2],[3]	345.6	[2],[3]		[2],[3]
Germany [Member]
Segment Reporting Information [Line Items]
Net sales											544.3	[1],[2]	571.9	[1],[2]	681.4	[1],[2]
Long-lived assets	217.5	[2],[3]				247.9	[2],[3]				217.5	[2],[3]	247.9	[2],[3]
United States [Member]
Segment Reporting Information [Line Items]
Net sales											263.3	[1],[2]	296.2	[1],[2]	324.9	[1],[2]
Long-lived assets	76.1	[2],[3]				79.5	[2],[3]				76.1	[2],[3]	79.5	[2],[3]
Finland [Member]
Segment Reporting Information [Line Items]
Net sales											102.6	[1],[2]	102.6	[1],[2]	229.7	[1],[2]
Long-lived assets	0	[2],[3]				0	[2],[3]				0	[2],[3]	0	[2],[3]
Japan [Member]
Segment Reporting Information [Line Items]
Net sales													29.3	[1],[2]	161.7	[1],[2]
Long-lived assets						0	[2],[3]						0	[2],[3]
Other [Member]
Segment Reporting Information [Line Items]
Net sales											157.3	[1],[2]	157.5	[1],[2]	146.7	[1],[2]
Long-lived assets	$ 14.7	[2],[3]				$ 18.2	[2],[3]				$ 14.7	[2],[3]	$ 18.2	[2],[3]

[1] Net sales attributed to the geographic area are based on the location of the manufacturing facility, except for Japan, which was a sales office and included in the divestiture of the Advance Materials business.

[2] All results and balances related to the UPC business are excluded for all periods presented.

[3] Long-lived assets consists of property, plant and equipment, net.

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Share-Based Compensation (Summary of Stock Option Activity) (Details) (Stock Options [Member], USD $) In Millions, except Share data, unless otherwise specified	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Stock Options [Member]
Shares [Roll Forward]
Outstanding, beginning balance	1,308,573
Granted	230,300	273,200	238,319
Exercised	(18,764)		0
Expired unexercised	(36,201)
Forfeited	(26,581)
Outstanding, ending balance	1,457,327	1,308,573
Vested or expected to vest, ending balance	1,431,451
Exercisable, ending balance	1,042,314
Weighted Average Exercise Price (in dollars per share) [Roll Forward]
Outstanding, beginning balance	$ 34.81
Granted	$ 32.06
Exercised	$ 28.03
Expired unexercised	$ 38.91
Forfeited	$ 29.96
Outstanding, ending balance	$ 32.97	$ 34.81
Vested or expected to vest, ending balance	$ 33.04
Exercisable, ending balance	$ 34.30
Share-based Compensation Arrangement by Share-based Payment Award, Options, Additional Disclosures [Abstract]
Weighted average remaining contractual term (years), outstanding, ending balance	5 years 5 months 9 days
Weighted average remaining contractual term (years), vested or Expected to Vest, ending balance	5 years 4 months 21 days
Weighted average remaining contractual term (years), exercisable, ending balance	4 years 2 months 16 days
Aggregate intrinsic value, outstanding, ending balance	$ 7.9
Aggregate intrinsic value, vested or expected to vest, ending balance	7.7
Aggregate intrinsic value, exercisable, ending balance	$ 4.4

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Quarterly Results of Operations (Unaudited) (Schedule of Quarterly Results of Operations) (Details) (USD $)	3 Months Ended								12 Months Ended
	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2014		Dec. 31, 2013		Dec. 31, 2012
Schedule of Selected Quarterly Financial Information [Line Items]
Net sales	$ 245,400,000	$ 262,900,000	$ 297,500,000	$ 261,700,000	$ 270,500,000	$ 265,700,000	$ 279,500,000	$ 341,800,000	$ 1,067,500,000	[1],[2]	$ 1,157,500,000	[1],[2]	$ 1,544,400,000	[1],[2]
Gross profit	50,600,000	62,600,000	63,100,000	61,900,000	54,600,000	65,900,000	63,800,000	74,200,000	238,200,000		258,400,000		243,600,000
Amounts attributable to OM Group, Inc. common stockholders:
Loss from continuing operations, net of tax	(189,000,000)	6,300,000	5,100,000	5,300,000	17,300,000	12,400,000	8,100,000	(109,500,000)	(172,300,000)		(71,700,000)		(38,300,000)
Loss from discontinued operations, net of tax	0	100,000	(300,000)	(100,000)	(100,000)	(300,000)	(11,400,000)	(500,000)	(300,000)		(12,300,000)		(400,000)
Loss attributable to OM Group, Inc. common stockholders	(189,000,000)	6,400,000	4,800,000	5,200,000	17,200,000	12,100,000	(3,300,000)	(110,000,000)	(172,600,000)		(84,000,000)		(38,700,000)
Net Income (loss) per common share - basic
Loss from continuing operations attributable to OM Group, Inc. common stockholders (in dollars per share)	$ (6.24)	$ 0.20	$ 0.16	$ 0.17	$ 0.54	$ 0.40	$ 0.26	$ (3.47)	$ (5.54)		$ (2.27)		$ (1.21)
Loss from discontinued operations attributable to OM Group, Inc. common stockholders (in dollars per share)	$ 0.00	$ 0.01	$ (0.01)	$ 0.00	$ 0.00	$ (0.01)	$ (0.36)	$ (0.02)	$ (0.01)		$ (0.39)		$ (0.01)
Net loss attributable to OM Group, Inc. common stockholders (in dollars per share)	$ (6.24)	$ 0.21	$ 0.15	$ 0.17	$ 0.54	$ 0.39	$ (0.10)	$ (3.49)	$ (5.55)		$ (2.66)		$ (1.22)
Net income (loss) per common share - assuming dilution
Loss from continuing operations attributable to OM Group, Inc. common stockholders (in dollars per share)	$ (6.24)	$ 0.20	$ 0.16	$ 0.16	$ 0.54	$ 0.39	$ 0.26	$ (3.46)	$ (5.54)		$ (2.27)		$ (1.21)
Loss from discontinued operations attributable to OM Group, Inc. common stockholders (in dollars per share)	$ 0.00	$ 0.00	$ (0.01)	$ 0.00	$ 0.00	$ (0.01)	$ (0.36)	$ (0.02)	$ (0.01)		$ (0.39)		$ (0.01)
Loss attributable to OM Group, Inc. common stockholders (in dollars per share)	$ (6.24)	$ 0.20	$ 0.15	$ 0.16	$ 0.54	$ 0.38	$ (0.10)	$ (3.48)	$ (5.55)		$ (2.66)		$ (1.22)
Loss on divestiture of advance materials business									(1,700,000)		111,600,000		0
Cost Reductions Initiatives									10,000,000
Goodwill and intangible asset impairment charges									195,400,000		0		0
Adjustment to contingent consideration									0		13,000,000		0
Rahu Catalytics Limited [Member]
Net income (loss) per common share - assuming dilution
Adjustment to contingent consideration					13,000,000
Advanced Materials [Member]
Schedule of Selected Quarterly Financial Information [Line Items]
Net sales									102,600,000		166,300,000		447,000,000
Net income (loss) per common share - assuming dilution
Loss on divestiture of advance materials business								111,600,000			111,600,000
Magnetic Technologies [Member]
Schedule of Selected Quarterly Financial Information [Line Items]
Net sales									495,000,000		522,600,000		631,600,000
Net income (loss) per common share - assuming dilution
Cost Reductions Initiatives	1,600,000	300,000			400,000	700,000	400,000	3,800,000	1,900,000		5,400,000
Goodwill and intangible asset impairment charges									195,400,000
Battery Technologies [Member]
Schedule of Selected Quarterly Financial Information [Line Items]
Net sales									153,800,000		150,300,000		143,000,000
Net income (loss) per common share - assuming dilution
Severance costs						100,000
Cost Reductions Initiatives		2,600,000					500,000	200,000	2,600,000		800,000
Settlement charge									3,200,000
Ultra Pure Chemicals [Member]
Net income (loss) per common share - assuming dilution
Loss on disposal of business (net of tax)							9,800,000
Corporate [Member]
Net income (loss) per common share - assuming dilution
Cost Reductions Initiatives	100,000	100,000			1,400,000	1,000,000			200,000		2,400,000
Specialty Chemicals [Member]
Schedule of Selected Quarterly Financial Information [Line Items]
Net sales									316,100,000	[3]	318,600,000	[3]	323,600,000	[3]
Net income (loss) per common share - assuming dilution
Cost Reductions Initiatives	$ 700,000	$ 1,000,000	$ 400,000				$ 1,100,000		$ 2,100,000		$ 1,100,000

[1] Net sales attributed to the geographic area are based on the location of the manufacturing facility, except for Japan, which was a sales office and included in the divestiture of the Advance Materials business.

[2] All results and balances related to the UPC business are excluded for all periods presented.

[3] All results related to the UPC business are excluded from the Specialty Chemicals segment for all periods presented.

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Share-Based Compensation (Narrative) (Details) (USD $)	12 Months Ended			6 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012	Jun. 30, 2014
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Authorized	2,550,000
Share-based compensation arrangement by share-based payment award, number of shares per award	$ 1.79
Tax benefit recognized as a result of the valuation allowance	$ 0	$ 0	$ 0
Unrecognized compensation expense	6,300,000
Unrecognized compensation expense, expected to be recognized in 2015	4,600,000
Unrecognized compensation expense, expected to be recognized in 2016	1,600,000
Unrecognized compensation expense, expected to be recognized in 2017	100,000
Number of shares issued to non-employee directors	8,795
Dividend yield assumption	0.94%	0.00%	0.00%
Proceeds from exercise of stock options	500,000	2,800,000	0
Share-based Compensation Arrangement by Share-based Payment Award, Maximum Number of Shares Per Employee	400,000
Director [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of shares issued to non-employee directors		18,069	23,752	7,084
Stock Options [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting period	3 years
Percentage of stock options vested and exercisable upon change of control	100.00%
Minimum vesting period to consider stock options as one award	1 year
Stock options granted	230,300	273,200	238,319
Dividend yield assumption	0.94%
Fair value of options vested	3,300,000	3,700,000	3,500,000
Intrinsic value of options exercised	100,000	1,200,000
Exercised	(18,764)		0
Proceeds from exercise of stock options	500,000	2,800,000
Stock Options [Member] | Chief Executive Officer [Member] | One Year Vesting [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting period	1 year
Stock options granted			4,419
Performance-Based Awards [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting period	3 years
Target percentage of initial grant	50.00%
Period for measuring performance criteria	3 years
Shares meeting performance objectives	4.00%
Performance-Based Awards [Member] | Minimum [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Target percentage of initial grant	0.00%
Performance-Based Awards [Member] | Maximum [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Target percentage of initial grant	100.00%
Restricted Stock - Performance-Based Awards [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Equity Instruments other than options, granted	206,225	245,950	130,500
Granted and expected to vest	57,189
Restricted Stock - Performance-Based Awards [Member] | Two Thousand Twelve [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Granted and expected to vest	548
Restricted Stock - Performance-Based Awards [Member] | Two Thousand Ten [Member] | Three Year Vesting [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Granted and expected to vest	850
RSUs - Performance-Based Awards [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Authorized	1,424,581
Equity Instruments other than options, granted	24,175	35,150	33,450
Granted and expected to vest	9,516
RSUs - Performance-Based Awards [Member] | Two Thousand Twelve [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Granted and expected to vest	3,927
RSUs - Performance-Based Awards [Member] | Two Thousand Ten [Member] | Three Year Vesting [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Granted and expected to vest	18,194
Time-Based Awards [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Value of shares issued under plan	$ 600,000	$ 1,500,000	$ 2,600,000
Restricted Stock Units - Time-Based Awards [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting period	3 years
U.S. RSUs - Time-Based Awards [Member] | Three Year Vesting [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Equity Instruments other than options, granted	18,525	60,000	69,327
International RSUs - Time-Based Awards [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Equity Instruments other than options, granted	6,050	7,950	17,060
Granted and expected to vest	13,967
Restricted Stock - Time-Based Awards [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Percentage of performance-based restricted stock awards vested upon change of control units	100.00%
U.S. Restricted Stock - Time-Based Awards [Member] | Three Year Vesting [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Equity Instruments other than options, granted			20,000
U.S. Restricted Stock - Time-Based Awards [Member] | Chief Executive Officer [Member] | One Year Vesting [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Equity Instruments other than options, granted			2,177

XML

Pension and Other Post-Retirement Benefit Plans (Schedule of Plan Assets Allocations) (Details)	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013
EPT Pension Plans [Member] | Active Plans [Member]
Defined Benefit Plan Disclosure [Line Items]
Actual allocation percentage	100.00%
Target allocation percentage	100.00%
EPT Pension Plans [Member] | Active Plans [Member] | U.S. Equity Securites [Member]
Defined Benefit Plan Disclosure [Line Items]
Actual allocation percentage	11.00%
Target allocation percentage	11.00%
EPT Pension Plans [Member] | Active Plans [Member] | Non-US Equity Securities [Member]
Defined Benefit Plan Disclosure [Line Items]
Actual allocation percentage	11.00%
Target allocation percentage	11.00%
EPT Pension Plans [Member] | Active Plans [Member] | Fixed Income [Member]
Defined Benefit Plan Disclosure [Line Items]
Actual allocation percentage	62.00%
Target allocation percentage	62.00%
EPT Pension Plans [Member] | Active Plans [Member] | High Yield [Member]
Defined Benefit Plan Disclosure [Line Items]
Actual allocation percentage	5.00%
Target allocation percentage	5.00%
EPT Pension Plans [Member] | Active Plans [Member] | TIPS [Member]
Defined Benefit Plan Disclosure [Line Items]
Actual allocation percentage	5.00%
Target allocation percentage	5.00%
EPT Pension Plans [Member] | Active Plans [Member] | Global REITS [Member]
Defined Benefit Plan Disclosure [Line Items]
Actual allocation percentage	5.00%
Target allocation percentage	5.00%
EPT Pension Plans [Member] | Active Plans [Member] | Cash [Member]
Defined Benefit Plan Disclosure [Line Items]
Actual allocation percentage	1.00%
Target allocation percentage	1.00%
SCM and Non-U.S. Pension Plans [Member]
Defined Benefit Plan Disclosure [Line Items]
Actual allocation percentage	100.00%	100.00%
SCM and Non-U.S. Pension Plans [Member] | U.S. Equity Securites [Member]
Defined Benefit Plan Disclosure [Line Items]
Actual allocation percentage	33.00%	38.00%
SCM and Non-U.S. Pension Plans [Member] | Corporate Bonds [Member]
Defined Benefit Plan Disclosure [Line Items]
Actual allocation percentage	8.00%	10.00%
SCM and Non-U.S. Pension Plans [Member] | Government Bonds [Member]
Defined Benefit Plan Disclosure [Line Items]
Actual allocation percentage	11.00%	10.00%
SCM and Non-U.S. Pension Plans [Member] | Fixed Income [Member]
Defined Benefit Plan Disclosure [Line Items]
Actual allocation percentage	15.00%	13.00%
SCM and Non-U.S. Pension Plans [Member] | Non-US Assets [Member]
Defined Benefit Plan Disclosure [Line Items]
Actual allocation percentage	31.00%	27.00%
SCM and Non-U.S. Pension Plans [Member] | Cash [Member]
Defined Benefit Plan Disclosure [Line Items]
Actual allocation percentage	2.00%	2.00%

XML

Reportable Segments and Geographic Information

12 Months Ended

Dec. 31, 2014

Segment Reporting Information, Profit (Loss) [Abstract]

Reportable Segments and Geographic Information

Reportable Segments and Geographic Information

We determine our segments based on how the chief operating decision maker makes decisions about allocating resources to segments and measuring their performance. We operate and report our results in four operating segments: Magnetic Technologies, Battery Technologies, Specialty Chemicals and Advanced Materials. Intersegment transactions are immaterial and generally recognized based on current market prices and are eliminated in consolidation. Corporate is comprised of general and administrative expenses not allocated to the operating segments.

The Magnetic Technologies segment develops, manufactures and distributes differentiated, high-performance industrial-use magnetic materials and related products and systems with exceptional magnetic and/or physical properties for a wide array of end markets, including automotive systems, electrical installation technology, energy conversion and distribution, industrial, retail and renewable energy.

The Specialty Chemicals segment develops, produces and supplies chemicals for electronic applications; industrial applications including coatings, composites and tire; and photomasks used by customers to produce semiconductors and related products.

The Battery Technologies segment provides advanced batteries, battery management systems, battery-related research and energetic devices for defense, space, medical and commercial markets.

The Advanced Materials segment manufactured inorganic products using unrefined cobalt and other metals and served the mobile energy storage, renewable energy, automotive systems, construction and mining, and industrial end markets.

The following table reflects the results of our reportable segments:

	2014			2013			2012
Net sales
Magnetic Technologies	$	495.0		$	522.6		$	631.6
Specialty Chemicals (e)	316.1			318.6			323.6
Battery Technologies	153.8			150.3			143.0
Advanced Materials	102.6			166.3			447.0
Intersegment items	—			(0.3		)	(0.8		)
	$	1,067.5		$	1,157.5		$	1,544.4
Operating profit (loss)
Magnetic Technologies (a)(b)(c)	$	(177.1	)	$	22.4		$	(22.3	)
Specialty Chemicals (a)(b)(d)(e)	31.3			35.8			34.5
Battery Technologies (a)(b)	19.9			21.8			19.6
Advanced Materials	(5.6		)	(0.4		)	6.4
Corporate(a)(b)(f)	(33.6		)	(38.5		)	(42.9		)
	(165.1		)	41.1			(4.7		)
Interest expense	$	(2.6	)	$	(12.3	)	$	(49.7	)
Foreign exchange gain (loss)	(6.5		)	8.0			(0.8		)
Gain (loss) on divestiture of Advance Materials business	1.7			(111.6		)	—
Other income (expense), net	(0.3		)	12.0			6.6
	(7.7		)	(103.9		)	(43.9		)
Loss from continuing operations before income taxes	(172.8		)	(62.8		)	(48.6		)
Expenditures for property, plant & equipment
Magnetic Technologies	$	26.5		$	30.8		$	27.3
Specialty Chemicals (e)	3.1			7.6			4.9
Battery Technologies	4.5			5.3			5.8
Advanced Materials	—			6.3			29.6
Corporate	0.4			3.1			—
	$	34.5		$	53.1		$	67.6
Depreciation and amortization
Magnetic Technologies	$	42.2		$	44.2		$	40.8
Specialty Chemicals (e)	14.0			14.8			15.7
Battery Technologies	10.5			10.1			10.1
Advanced Materials	—			3.9			16.9
Corporate	0.8			0.9			0.8
	$	67.5		$	73.9		$	84.3
Total assets
Magnetic Technologies	$	675.0		$	1,020.6
Specialty Chemicals (e)	396.3			416.5
Battery Technologies	265.9			237.4
Advanced Materials	10.6			17.9
Corporate	71.7			90.7
	$	1,419.5		$	1,783.1

(a) The year ended December 31, 2014 includes a $195.4 million goodwill and intangible asset non-cash impairment charge in Magnetic Technologies. The results also include costs related to cost optimization and other business improvement initiatives of $1.9 million in Magnetic Technologies, $2.6 million in Battery Technologies, $2.1 million in Specialty Chemicals, and $0.2 million in Corporate, respectively. Cost reduction initiatives include headcount reductions, minor facility consolidation, supply chain optimization, corporate cost reductions, and other structural changes. There was also a $3.2 million non-cash pension settlement charge in Battery Technologies during the fourth quarter.

(b) The year ended December 31, 2013 includes charges related to cost reduction initiatives of $5.4 million in Magnetic Technologies, $0.8 million in Battery Technologies, $1.1 million in Specialty Chemicals and $2.4 million in Corporate, respectively.

(c) Includes $55.9 million of charges related to the VAC inventory purchase accounting step-up and LCM charges in 2012.

(d) Includes property sale gains of $2.9 million in 2012.

(e) All results related to the UPC business are excluded from the Specialty Chemicals segment for all periods presented.

(f) Includes a $2.5 million non-cash pension settlement charge to certain participants in one of our U.S. defined benefit pension plans in 2012.

	Net Sales(a)(c)		Long-Lived Assets(b)(c)
Geographic Region Information
2014
Germany	544.3		217.5
United States	263.3		76.1
Finland	102.6		—
Other	157.3		14.7
	$	1,067.5	$	308.3
2013
Germany	$	571.9	$	247.9
United States	296.2		79.5
Finland	102.6		—
Japan	29.3		—
Other	157.5		18.2
	$	1,157.5	$	345.6
2012
Germany	$	681.4
United States	324.9
Finland	229.7
Japan	161.7
Other	146.7
	$	1,544.4

(a) Net sales attributed to the geographic area are based on the location of the manufacturing facility, except for Japan, which was a sales office and included in the divestiture of the Advance Materials business.

(b) Long-lived assets consists of property, plant and equipment, net.

(c) All results and balances related to the UPC business are excluded for all periods presented.

XML

Acquisitions and Divestitures Summary of discontinued operations activity (Details) (USD $) In Millions, except Per Share data, unless otherwise specified	3 Months Ended								12 Months Ended			0 Months Ended
	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012	May 31, 2013
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Loss from operations of divested business (net of tax)	$ 0	$ 0.1	$ (0.3)	$ (0.1)	$ (0.1)	$ (0.3)	$ (11.4)	$ (0.5)	$ (0.3)	$ (12.3)	$ (0.4)
Loss from discontinued operations (net of tax)									(0.3)	(12.3)	(0.4)
Basic (in dollars per share)	$ 0.00	$ 0.01	$ (0.01)	$ 0.00	$ 0.00	$ (0.01)	$ (0.36)	$ (0.02)	$ (0.01)	$ (0.39)	$ (0.01)
Ultra Pure Chemicals [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Net Sales									0	38.3	93.4
Loss from operations of divested business (net of tax)									(0.1)	(2.5)	(0.4)
Loss on disposal of business (net of tax)			(0.2)						(0.2)	(9.8)	0	(9.8)
Loss from discontinued operations (net of tax)									$ (0.3)	$ (12.3)	$ (0.4)
Basic (in dollars per share)									$ (0.01)	$ (0.39)	$ (0.01)

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Reportable Segments and Geographic Information (Tables)

12 Months Ended

Dec. 31, 2014

Segment Reporting Information, Profit (Loss) [Abstract]

Results of Reportable Segments

The following table reflects the results of our reportable segments:

	2014			2013			2012
Net sales
Magnetic Technologies	$	495.0		$	522.6		$	631.6
Specialty Chemicals (e)	316.1			318.6			323.6
Battery Technologies	153.8			150.3			143.0
Advanced Materials	102.6			166.3			447.0
Intersegment items	—			(0.3		)	(0.8		)
	$	1,067.5		$	1,157.5		$	1,544.4
Operating profit (loss)
Magnetic Technologies (a)(b)(c)	$	(177.1	)	$	22.4		$	(22.3	)
Specialty Chemicals (a)(b)(d)(e)	31.3			35.8			34.5
Battery Technologies (a)(b)	19.9			21.8			19.6
Advanced Materials	(5.6		)	(0.4		)	6.4
Corporate(a)(b)(f)	(33.6		)	(38.5		)	(42.9		)
	(165.1		)	41.1			(4.7		)
Interest expense	$	(2.6	)	$	(12.3	)	$	(49.7	)
Foreign exchange gain (loss)	(6.5		)	8.0			(0.8		)
Gain (loss) on divestiture of Advance Materials business	1.7			(111.6		)	—
Other income (expense), net	(0.3		)	12.0			6.6
	(7.7		)	(103.9		)	(43.9		)
Loss from continuing operations before income taxes	(172.8		)	(62.8		)	(48.6		)
Expenditures for property, plant & equipment
Magnetic Technologies	$	26.5		$	30.8		$	27.3
Specialty Chemicals (e)	3.1			7.6			4.9
Battery Technologies	4.5			5.3			5.8
Advanced Materials	—			6.3			29.6
Corporate	0.4			3.1			—
	$	34.5		$	53.1		$	67.6
Depreciation and amortization
Magnetic Technologies	$	42.2		$	44.2		$	40.8
Specialty Chemicals (e)	14.0			14.8			15.7
Battery Technologies	10.5			10.1			10.1
Advanced Materials	—			3.9			16.9
Corporate	0.8			0.9			0.8
	$	67.5		$	73.9		$	84.3
Total assets
Magnetic Technologies	$	675.0		$	1,020.6
Specialty Chemicals (e)	396.3			416.5
Battery Technologies	265.9			237.4
Advanced Materials	10.6			17.9
Corporate	71.7			90.7
	$	1,419.5		$	1,783.1

(a) The year ended December 31, 2014 includes a $195.4 million goodwill and intangible asset non-cash impairment charge in Magnetic Technologies. The results also include costs related to cost optimization and other business improvement initiatives of $1.9 million in Magnetic Technologies, $2.6 million in Battery Technologies, $2.1 million in Specialty Chemicals, and $0.2 million in Corporate, respectively. Cost reduction initiatives include headcount reductions, minor facility consolidation, supply chain optimization, corporate cost reductions, and other structural changes. There was also a $3.2 million non-cash pension settlement charge in Battery Technologies during the fourth quarter.

(b) The year ended December 31, 2013 includes charges related to cost reduction initiatives of $5.4 million in Magnetic Technologies, $0.8 million in Battery Technologies, $1.1 million in Specialty Chemicals and $2.4 million in Corporate, respectively.

(c) Includes $55.9 million of charges related to the VAC inventory purchase accounting step-up and LCM charges in 2012.

(d) Includes property sale gains of $2.9 million in 2012.

(e) All results related to the UPC business are excluded from the Specialty Chemicals segment for all periods presented.

(f) Includes a $2.5 million non-cash pension settlement charge to certain participants in one of our U.S. defined benefit pension plans in 2012.

Schedule of Geographic Information

	Net Sales(a)(c)		Long-Lived Assets(b)(c)
Geographic Region Information
2014
Germany	544.3		217.5
United States	263.3		76.1
Finland	102.6		—
Other	157.3		14.7
	$	1,067.5	$	308.3
2013
Germany	$	571.9	$	247.9
United States	296.2		79.5
Finland	102.6		—
Japan	29.3		—
Other	157.5		18.2
	$	1,157.5	$	345.6
2012
Germany	$	681.4
United States	324.9
Finland	229.7
Japan	161.7
Other	146.7
	$	1,544.4

(a) Net sales attributed to the geographic area are based on the location of the manufacturing facility, except for Japan, which was a sales office and included in the divestiture of the Advance Materials business.

(b) Long-lived assets consists of property, plant and equipment, net.

(c) All results and balances related to the UPC business are excluded for all periods presented.

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Earnings Per Share (Computation of Basic And Diluted Net Income Per Common Share) (Details) (USD $) In Millions, except Per Share data, unless otherwise specified	3 Months Ended								12 Months Ended
	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Earnings Per Share [Abstract]
Net loss	$ (189.0)	$ 6.4	$ 4.8	$ 5.2	$ 17.2	$ 12.1	$ (3.3)	$ (110.0)	$ (172.6)	$ (84.0)	$ (38.7)
Earnings per common share:
Net loss attributable to OM Group, Inc. common stockholders - basic (in dollars per share)	$ (6.24)	$ 0.21	$ 0.15	$ 0.17	$ 0.54	$ 0.39	$ (0.10)	$ (3.49)	$ (5.55)	$ (2.66)	$ (1.22)
Net loss attributable to OM Group, Inc. common stockholders - assuming dilution (in dollars per share)	$ (6.24)	$ 0.20	$ 0.15	$ 0.16	$ 0.54	$ 0.38	$ (0.10)	$ (3.48)	$ (5.55)	$ (2.66)	$ (1.22)
Weighted average shares outstanding — basic (in shares)									31.1	31.6	31.9
Dilutive effect of stock options and restricted stock (in shares)									0	0	0
Weighted average shares outstanding — assuming dilution (in shares)									31.1	31.6	31.9

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Pension and Other Post-Retirement Benefit Plans (Tables)

12 Months Ended

Dec. 31, 2014

Pension Plans [Member]

Defined Benefit Plan Disclosure [Line Items]

Schedule of changes in benefit obligation and plan assets, funded status and amounts recognized in Consolidated Balance Sheets

The following table sets forth the changes in the benefit obligation and the plan assets during the year and reconciles the funded status of the defined benefit plans with the amounts recognized in the Consolidated Balance Sheet at December 31:

	Pension Benefits
	U.S. Plans						Non-U.S. Plans
	2014			2013			2014			2013
Change in benefit obligation
Projected benefit obligation at beginning of year	$	(220.5	)	$	(245.0	)	$	(191.1	)	$	(181.4	)
Service cost	(1.0		)	(1.2		)	(6.8		)	(5.1		)
Interest cost	(9.2		)	(8.4		)	(6.1		)	(6.1		)
Actuarial (loss) gain	(29.4		)	20.2			(25.8		)	(0.4		)
Benefits paid	14.4			13.9			10.3			10.2
Settlement	29.6			—			—			—
Foreign currency exchange rate changes	—			—			25.3			(8.3		)
Projected benefit obligation at end of year	(216.1		)	(220.5		)	(194.2		)	(191.1		)
Change in plan assets
Fair value of plan assets at beginning of year	177.4			180.5			4.2			4.0
Actual return on plan assets	17.2			5.7			—			—
Employer contributions	1.5			5.1			11.9			10.1
Settlement	(29.6		)	—			—			—
Foreign currency exchange rate changes	—			—			(0.7		)	0.3
Benefits paid	(14.4		)	(13.9		)	(10.3		)	(10.2		)
Fair value of plan assets at end of year	152.1			177.4			5.1			4.2
Funded status — plan assets less than benefit obligations	(64.0		)	(43.1		)	(189.1		)	(186.9		)
Recognized in accumulated other comprehensive income:
Net actuarial loss (gain)	18.4			(16.9		)	18.4			(0.1		)
Amounts not yet recognized as a component of net postretirement benefit cost	$	36.3		$	17.9		$	49.6		$	31.2
Amounts recorded in the balance sheet:
Accrued benefit liability — current	$	(0.6	)	$	(0.7	)	$	(8.1	)	$	(8.8	)
Accrued benefit liability — long-term	(63.4		)	(42.4		)	(181.0		)	(178.1		)
Accumulated other comprehensive loss	36.3			17.9			49.6			31.2
Net amount recognized	$	(27.7	)	$	(25.2	)	$	(139.5	)	$	(155.7	)

Future pension benefit payments expected to be paid

Future pension benefit payments expected to be paid are as follows:

	Pension
Expected benefit payments	U.S. Plans		Non-U.S. Plans
2015	$	14.4	$	10.7
2016	$	14.1	$	12.1
2017	$	14.0	$	12.3
2018	$	13.9	$	12.0
2019	$	13.8	$	10.4
2020-2024	$	67.6	$	51.4

Schedule of amounts in accumulated other comprehensive income (loss) expected to be recognized during 2012

The amounts in Accumulated other comprehensive income (loss) that are expected to be recognized as components of net periodic benefit cost during 2015 are as follows:

	U.S. Plans		Non-U.S. Plans		Total
Net actuarial loss	$	0.9	$	2.6	$	3.5

Schedule of weighted-average assumptions used

The following weighted-average assumptions were used to determine the Company’s pension benefit obligations for the year ended December 31:

	2014	2013
U.S. Plans
Discount rate — EPT Active Plans	3.7%	4.6%
Discount rate — EPT Inactive Plans	3.5%	4.4%
Discount rate — Divested Business Plans	3.5%	4.3%
Expected return on pension plan assets — EPT Active Plans	6.3%	6.5%
Expected return on pension plan assets — EPT Inactive Plans	6.3%	6.5%
Expected return on pension plan assets — Divested Business Plans	6.3%	6.5%
Rate of increases in compensation — EPT Active Plans	3.5%	3.5%
Non U.S. Plans
Discount rate	2.0%	3.5%
Rate of increases in compensation	2.5% – 3.0%	2.5% – 3.0%

The following weighted-average assumptions were used to determine the Company’s net periodic pension benefit costs for the year ended December 31:

	2014	2013
U.S. Plans
Discount rate — EPT Active Plans	4.6%	3.7%
Discount rate — EPT Inactive Plans	4.4%	3.5%
Discount rate — Divested Business Plans	4.3%	3.4%
Expected return on pension plan assets — EPT Active Plans	6.5%	7.0%
Expected return on pension plan assets — EPT Inactive Plans	6.5%	4.7%
Expected return on pension plan assets — Divested Business Plans	6.5%	6.0%
Non U.S. Plans
Discount rate	3.5%	3.5%
Expected return on pension plan assets	3.5%	3.7%

Schedule of plan assets allocation

The fair value measurements of defined benefit pension plan assets by category at December 31, 2014 are as follows:

	December 31,		Quoted Prices in Active Markets for Identical		Significant Other Observable		Significant Unobservable
Category	2014		Assets (Level 1)		Inputs (Level 2)		Inputs (Level 3)
Equity securities — US	$	21.2	$	3.9	$	17.3	$	—
Equity securities — Non US	15.4		—		15.4		—
Fixed income:
Bonds	88.6		—		88.6		—
Other fixed income	4.3		—		4.3		—
High yield	7.2		—		7.2		—
TIPS	6.7		—		6.7		—
Global REITS	7.0		—		7.0		—
Non-U.S. assets	5.1		—		5.1		—
Cash and cash equivalents	1.7		1.7		—		—
Total	$	157.2	$	5.6	$	151.6	$	—

U.S. Pension Plans [Member]

Defined Benefit Plan Disclosure [Line Items]

Schedule of net benefit costs and amounts recognized in other comprehensive income (loss)

Set forth below is a detail of the net periodic pension and other post-retirement benefit expense for the defined benefit plans for the years ended December 31:

	Pension Benefits
	U.S. Plans
	2014			2013			2012
Service cost	$	1.0		$	1.2		$	1.1
Interest cost	9.2			8.4			9.3
Amortization of unrecognized net loss	1.4			0.3			1.5
Expected return on plan assets	(10.7		)	(9.4		)	(10.4		)
Settlement charge	3.2			—			—
Net periodic benefit cost	4.1			0.5			1.5
Net loss (gain) arising during the year	22.1			(16.1		)	1.3
Net gain recognized during the year	(3.6		)	(0.8		)	(3.4		)
Total recognized in other comprehensive loss	18.5			(16.9		)	(2.1		)
Total recognized in net periodic benefit cost and other comprehensive loss	$	22.6		$	(16.4	)	$	(0.6	)

EPT Pension Plans [Member]

Defined Benefit Plan Disclosure [Line Items]

Schedule of plan assets allocation

Below are our actual and established target allocations for the EPT pension plans, representing 93% of U.S. pension plan assets:

	Actual Allocation		Target Allocation
U.S. equity securities	11	%	11	%
Non-U.S. equity securities	11	%	11	%
Fixed income	62	%	62	%
High yield	5	%	5	%
TIPS	5	%	5	%
Global REITS	5	%	5	%
Cash	1	%	1	%
Total assets	100	%	100	%

Non-U.S. Pension Plans [Member]

Defined Benefit Plan Disclosure [Line Items]

Schedule of net benefit costs and amounts recognized in other comprehensive income (loss)

Set forth below is a detail of the net periodic pension and other post-retirement benefit expense for the defined benefit plans for the years ended December 31:

	Pension Benefits
	Non-U.S. Plans
	2014			2013			2012
Service cost	$	6.8		$	5.1		$	4.0
Interest cost	6.1			6.1			7.6
Amortization of unrecognized net loss	1.6			1.8			0.8
Net periodic benefit cost	14.5			13.0			12.4
Net loss arising during the year	25.8			0.3			29.8
Net gain recognized during the year	(1.6		)	(1.8		)	(0.8		)
Exchange rate gain (loss) gain	(5.8		)	1.4			0.8
Total recognized in other comprehensive loss	18.4			(0.1		)	29.8
Total recognized in net periodic benefit cost and other comprehensive loss	$	32.9		$	12.9		$	42.2

SCM and Non-U.S. Pension Plans [Member]

Defined Benefit Plan Disclosure [Line Items]

Schedule of plan assets allocation

Our asset allocations by asset category for the Divested business and non-U.S. plans are as follows:

	December 31,
	2014		2013
U.S. equity securities	33	%	38	%
Corporate bonds	8	%	10	%
Government bonds	11	%	10	%
Other fixed income	15	%	13	%
Non-U.S. assets	31	%	27	%
Cash	2	%	2	%
Total assets	100	%	100	%

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Goodwill and Other Intangible Assets (Intangible Assets) (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2014		Dec. 31, 2013		Dec. 31, 2012
Intangible Assets, Net (Excluding Goodwill) [Abstract]
Intangible assets, original value	$ 513.1		$ 532.8
Intangible assets, accumulated amortization	(161.6)	[1]	(129.8)	[1]
Impairment of Intangible Assets, Net	(26.7)
Intangible assets, net carrying value	324.8		403.0
Intangible assets amortization expense	25.0		26.1		25.5
Future amortization expense [Abstract]
2015	25.2
2016	24.9
2017	24.8
2018	20.7
2019	21.1
UPC Business [Member]
Intangible Assets, Net (Excluding Goodwill) [Abstract]
Non-current intangible assets with a carrying value			17.2
Customer Relationships [Member]
Finite-Lived Intangible Assets, Net [Abstract]
Finite-lived intangible assets, original value	218.2		234.5
Finite-Lived Intangible Assets, Accumulated Amortization	90.1	[1]	82.4	[1]
Impairment of Intangible Assets, Finite-lived	0
Finite-lived intangible assets, net carrying value	128.1		152.1
Intangible Assets, Net (Excluding Goodwill) [Abstract]
Weighted-average useful life of intangible assets (in years)	10 years
Developed Technology [Member]
Finite-Lived Intangible Assets, Net [Abstract]
Finite-lived intangible assets, original value	135.5		136.5
Finite-Lived Intangible Assets, Accumulated Amortization	36.1	[1]	19.9	[1]
Impairment of Intangible Assets, Finite-lived	0
Finite-lived intangible assets, net carrying value	99.4		116.6
Intangible Assets, Net (Excluding Goodwill) [Abstract]
Weighted-average useful life of intangible assets (in years)	12 years
Know-how [Member]
Finite-Lived Intangible Assets, Net [Abstract]
Finite-lived intangible assets, original value	20.1		18.6
Finite-Lived Intangible Assets, Accumulated Amortization	4.6	[1]	3.6	[1]
Impairment of Intangible Assets, Finite-lived	0
Finite-lived intangible assets, net carrying value	15.5		15.0
Intangible Assets, Net (Excluding Goodwill) [Abstract]
Weighted-average useful life of intangible assets (in years)	16 years
Capitalized Software [Member]
Finite-Lived Intangible Assets, Net [Abstract]
Finite-lived intangible assets, original value	22.3		22.0
Finite-Lived Intangible Assets, Accumulated Amortization	18.6	[1]	17.4	[1]
Impairment of Intangible Assets, Finite-lived	0
Finite-lived intangible assets, net carrying value	3.7		4.6
Intangible Assets, Net (Excluding Goodwill) [Abstract]
Weighted-average useful life of intangible assets (in years)	3 years
Other Intangible Assets [Member]
Finite-Lived Intangible Assets, Net [Abstract]
Finite-lived intangible assets, original value	2.9		4.2
Finite-Lived Intangible Assets, Accumulated Amortization	2.6	[1]	3.6	[1]
Impairment of Intangible Assets, Finite-lived	0
Finite-lived intangible assets, net carrying value	0.3		0.6
Tradenames [Member]
Indefinite-Lived Intangible Assets (Excluding Goodwill) [Abstract]
Indefinite-Lived Intangible Assets (Excluding Goodwill), Gross	114.1		117.0
Indefinite-lived Intangible Assets, Accumulated Amortization	9.6	[1]	2.9	[1]
Impairment of Intangible Assets, Finite-lived	(26.7)
Indefinite-lived Intangible assets, net carrying value	77.8		114.1
Magnetic Technologies [Member] | Tradenames [Member]
Indefinite-Lived Intangible Assets (Excluding Goodwill) [Abstract]
Impairment of Intangible Assets, Finite-lived	$ 26.7

[1] Actual amounts of amortization expense may differ from the estimated amounts due to changes in foreign currency exchange rates, impairment of intangible assets, intangible assets additions, accelerated amortization of intangible assets, acquisitions and divestitures and other factors.

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Pension and Other Post-Retirement Benefit Plans (Schedule of Net Benefit Costs and Amounts Recognized in Other Comprehensive Income (Loss)) (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
U.S. Pension Plans [Member]
Defined Benefit Plan Disclosure [Line Items]
Service cost	$ 1.0	$ 1.2	$ 1.1
Interest cost	9.2	8.4	9.3
Amortization of unrecognized net loss	1.4	0.3	1.5
Expected return on plan assets	(10.7)	(9.4)	(10.4)
Settlement charge	3.2	0	0
Net periodic benefit cost	4.1	0.5	1.5
Net loss (gain) arising during the year	22.1	(16.1)	1.3
Net gain recognized during the year	(3.6)	(0.8)	(3.4)
Total recognized in other comprehensive loss	18.5	(16.9)	(2.1)
Total recognized in net periodic benefit cost and other comprehensive loss	22.6	(16.4)	(0.6)
Non-U.S. Pension Plans [Member]
Defined Benefit Plan Disclosure [Line Items]
Service cost	6.8	5.1	4.0
Interest cost	6.1	6.1	7.6
Amortization of unrecognized net loss	1.6	1.8	0.8
Net periodic benefit cost	14.5	13.0	12.4
Net loss (gain) arising during the year	25.8	0.3	29.8
Net gain recognized during the year	1.6	1.8	0.8
Exchange rate gain (loss) gain	(5.8)	1.4	0.8
Total recognized in other comprehensive loss	18.4	(0.1)	29.8
Total recognized in net periodic benefit cost and other comprehensive loss	32.9	12.9	42.2
Battery Technologies [Member]
Defined Benefit Plan Disclosure [Line Items]
Settlement charge	$ (3.2)

XML

Income Taxes (Tax Expense (Benefit)) (Details) (USD $)	12 Months Ended			3 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2014	Sep. 30, 2014	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Mar. 29, 2013
Schedule of Tax Expense (Benefit) [Line Items]
Goodwill and intangible asset impairment	$ 195,400,000	$ 0	$ 0
Cost reductions initiatives	10,000,000
Effective income tax rate	27.40%		6.50%
Loss on divestiture of advance materials business	(1,700,000)	111,600,000	0
Percentage of interest in joint venture by the company										55.00%
Income tax receivable, current			37,900,000
Undistributed earnings of consolidated foreign subsidiaries with no U.S. income tax provision	402,000,000			402,000,000
Income Taxes Paid	18,800,000	47,200,000	33,900,000
Parent [Member]
Schedule of Tax Expense (Benefit) [Line Items]
Discrete tax benefit related to the GTL joint venture			6,700,000
VAC [Member]
Schedule of Tax Expense (Benefit) [Line Items]
Charges as a result of step-up of inventory to fair value			55,900,000
GTL [Member]
Schedule of Tax Expense (Benefit) [Line Items]
Effective income tax rate, excluding discrete items			31.80%
Discrete tax expense related to the GTL joint venture			10,400,000
Discrete tax expense related to GTL, prepaid tax asset impairment			5,600,000
Discrete tax expense related to joint venture, permanent differences			6,600,000
Percentage of interest in joint venture by the company			55.00%
Magnetic Technologies [Member]
Schedule of Tax Expense (Benefit) [Line Items]
Cost reductions initiatives	1,900,000	5,400,000		1,600,000	300,000	400,000	700,000	400,000	3,800,000
Goodwill impairment loss	168,700,000
Advanced Materials [Member]
Schedule of Tax Expense (Benefit) [Line Items]
Goodwill impairment loss	0
Loss on divestiture of advance materials business		$ 111,600,000							$ 111,600,000
Effective income tax rate, excluding discrete items		22.10%

XML

Property, Plant and Equipment, net (Schedule of Property, Plant and Equipment) (Details) (USD $) In Millions, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013
Property, Plant and Equipment [Line Items]
Property, plant and equipment, at cost	$ 530.2	$ 543.4
Less accumulated depreciation	(221.9)	(197.8)
Property, plant and equipment, net	308.3	345.6
Land and improvements [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment, at cost	37.6	39.6
Building and Improvements [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment, at cost	138.0	145.8
Machinery and Equipment [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment, at cost	346.4	350.4
Furniture and Fixtures [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment, at cost	$ 8.2	$ 7.6

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Significant Accounting Policies

12 Months Ended

Dec. 31, 2014

Accounting Policies [Abstract]

Significant Accounting Policies

Significant Accounting Policies

Principles of Consolidation — OM Group, Inc. (the “Company”, “we”, “our”, “us”) is a technology-driven industrial company serving attractive global markets, including automotive systems, electronic devices, aerospace and defense, industrial and medical. We use innovative technologies to address customers' complex applications and demanding requirements. Our strategy is to grow organically through product and application innovation and new market and customer development, to grow strategically through complementary acquisitions to build-out our growth platforms, and to maximize total stockholder returns through a combination of business growth, financial discipline, optimal deployment of capital and continued operational excellence. Our objective is to deliver sustainable, profitable growth and create long-term stockholder value. The consolidated financial statements include the accounts of OM Group and its consolidated subsidiaries. We were formed in 1991 as a Delaware Corporation. Intercompany accounts and transactions have been eliminated in consolidation.

Certain financial data may have been rounded. As a result of such rounding, the totals of data presented in this document may vary slightly from the actual arithmetical totals of such data.

On November 24, 2014, we completed the acquisition of Ener-Tek International, Inc., which operates under the brand name Yardney Technical Products ("Yardney"), and now operates as a part of our Battery Technologies business. Based in East Greenwich, Rhode Island, Yardney is a designer, developer and manufacturer of high-performance lithium-ion and silver-zinc cells and batteries for niche applications in the defense and aerospace markets. We funded the $24.6 million acquisition price through existing cash balances.

On May 31, 2013, we completed the sale of our Ultra Pure Chemicals business. The results of our Ultra Pure Chemicals business are reported as discontinued operations in the accompanying unaudited condensed consolidated financial statements and Notes to Consolidated Financial Statements for all periods presented. See note 5 - Acquisitions and Divestitures.

On March 29, 2013, we completed the divestiture of our cobalt-based business. The transaction comprised the sale of the downstream portion of the business, (including its cobalt refinery assets in Kokkola, Finland) and the transfer of our 55% equity interests in the DRC-based joint venture known as GTL to the joint venture partners, subject to a security interest in our favor with respect to the joint venture's performance related to certain supply agreements. Until March 29, 2013, we consolidated the GTL joint venture because we had a controlling interest. Non-controlling interest was recorded for the remaining 45% interest. See note 5 - Acquisitions and Divestitures.

The financial position, results of operations and cash flows of acquisitions are included in the Consolidated Financial Statements from the dates of acquisition.

Unless otherwise indicated, all disclosures and amounts in the Notes to Consolidated Financial Statements relate to the Company's continuing operations.

Use of Estimates - The preparation of financial statements, in conformity with US generally accepted accounting policies ("US GAAP"), requires management to make estimates and assumptions in certain circumstances that affect the amounts reported in the accompanying consolidated financial statements and notes. Actual results could differ from these estimates.

Cash Equivalents - All highly-liquid investments, with a maturity of three months or less when purchased, are considered to be cash equivalents.

Allowance for Doubtful Accounts - We have recorded an allowance for doubtful accounts to record accounts receivable at their estimated net realizable value. The allowance is based upon an analysis of historical bad debts, a review of the aging of accounts receivable and the current creditworthiness of customers. Accounts are written off against the allowance when it becomes probable that collections will not occur. Trade credit is generally extended on a short-term basis and accounts receivable generally do not bear interest.

Inventories - Magnetic Technologies' inventories are valued using the average cost method. Cost of sales under the average cost method represents the weighted average cost of the items sold. We believe the average cost method provides for a better matching of inventory costs with related sales based on Magnetic Technologies' manufacturing process. Our remaining inventory is valued using First in, First out (FIFO). Inventory costs include raw materials, labor and manufacturing overhead. Inventory accounted for under the percentage-of-completion method is included in work-in-process inventory and represents accumulated contract costs less the portion of such costs allocated to delivered units. The costs attributed to units delivered are based on the estimated average cost of all units expected to be produced on a contract-by-contract basis.

Changes in the price of rare earth and other materials can have a significant impact on inventory valuation. We evaluate the need for a lower of cost or market (“LCM”) adjustment to inventories based on the selling prices of our finished products generally at the end of the period. To the extent raw material prices increase subsequent to the balance sheet date, we consider these price movements in our LCM evaluation. Declines in the selling prices of our finished goods, which can result from decreases in the market price of raw materials or other factors, can result in our inventory carrying value being written down to a lower market value.

Property, Plant and Equipment - Property, plant and equipment is recorded at historical cost less accumulated depreciation. Depreciation of plant and equipment, including assets recorded under capital leases, is provided by the straight-line method over the useful lives of 5 to 25 years for land improvements, 5 to 40 years for buildings and improvements, 5 to 15 years for machinery and equipment (with the majority in the range of 5 to 10 years), 5 to 10 years for furniture and fixtures and 3 to 5 years for vehicles and computers and related equipment. Leasehold improvements are depreciated over the shorter of the estimated useful life or the term of the lease.

Long-lived Assets other than Goodwill - Long-lived assets are reviewed for impairment whenever events or changes in circumstances indicate the carrying amount may not be recoverable. Events or circumstances that would result in an impairment review primarily include operating losses, a significant change in the use of an asset, or the planned disposal or sale of the asset. The asset would be considered impaired when the future net undiscounted cash flows generated by the asset are less than its carrying value. An impairment loss would be recognized based on the amount by which the carrying value of the asset exceeds its estimated fair value.

Goodwill and Intangible Assets - We evaluate the carrying value of goodwill and indefinite-lived intangible assets for impairment annually as of October 1 and between annual evaluations if changes in circumstances or the occurrence of certain events indicate potential impairment. If the carrying value of goodwill or an indefinite-lived intangible asset exceeds its fair value, an impairment loss is recognized.

Intangible assets consist of (i) definite-lived assets subject to amortization and (ii) indefinite-lived intangible assets not subject to amortization. Definite-lived intangible assets consist principally of customer relationships, developed technology, know-how, capitalized software and license agreements and are being amortized using the straight-line or other appropriate method, if applicable. Indefinite-lived intangible assets consist of tradenames.

Retained Liabilities of Businesses Sold - Retained liabilities of businesses sold include obligations related to our former Precious Metals Group (“PMG”), which was sold in 2003. Under terms of the sale agreement, we will reimburse the buyer of this business for certain items that become due and payable by the buyer subsequent to the sale date. Such items are principally comprised of taxes payable related to periods during which we owned PMG. The liability was $11.3 million and $12.3 million as of December 31, 2014 and 2013, respectively. Corresponding receivables related to the indemnification of the liabilities of $8.2 million and $9.1 million at December 31, 2014 and 2013, respectively, were recorded in Other non-current assets.

Revenue Recognition — Except for revenue recognized under the percentage of completion method of accounting in Battery Technologies (see discussion below), we recognize revenue when persuasive evidence of an arrangement exists, unaffiliated customers take title and assume risk of loss, the sales price is fixed or determinable and collection of the related receivable is reasonably assured. Revenue recognition generally occurs upon shipment of product or usage of inventory consigned to customers. All amounts in a sales transaction billed to a customer related to shipping and handling are reported as sales.

The Battery Technologies segment uses the percentage of completion method to recognize most of its revenue. Most defense contracts use the units-of-delivery method while most space contracts use the cost-to-cost method as the basis to measure progress toward completing a contract. Under the units-of-delivery method, revenues are recognized based on the contract price of units delivered. Under the cost-to-cost method, revenue is recognized based on the ratio of cost incurred compared to management's estimate of total costs expected to be incurred under the contract. The percentage of completion method requires substantial judgment on the part of management due to the duration of the contracts as well as the technical nature of the products involved. Contract revenues and cost estimates are reviewed at least quarterly and adjustments are reflected in the accounting period such amounts are determined. Billings in excess of amounts earned are deferred. Anticipated losses on contracts are recorded in full in the period in which the loss becomes evident.

Cost of Goods Sold — Cost of goods sold is comprised of raw material costs, direct production, maintenance and utility costs, depreciation, other overhead costs and shipping and handling costs.

Research and Development — Research and development costs are charged to expense when incurred, are included in selling, general and administrative expenses and amounted to $26.0 million, $26.3 million and $32.2 million in 2014, 2013 and 2012, respectively. These amounts do not include development and application engineering costs incurred in conjunction with fulfilling customer orders and executing projects.

Accounting for Operating Leases — Lease expense is recorded on a straight-line basis. The noncancellable lease term used to calculate the amount of the straight-line expense is generally determined to be the initial lease term, including any optional renewal terms that are reasonably assured. Certain leases include escalating rent provisions and lease incentives which are recognized as lease expense on a straight-line basis over the lease term. Lease payments that depend on an existing index or rate are included in our minimum lease payments that are recognized as lease expense on a straight-line basis over the minimum lease term.

Income Taxes — Deferred income taxes are provided to recognize the effect of temporary differences between financial and tax reporting. Deferred income taxes are not provided for undistributed earnings of foreign consolidated subsidiaries, to the extent such earnings are determined to be reinvested for an indefinite period of time.

Foreign Currency Translation — The functional currency for most of our operating subsidiaries outside of the United States is the applicable local currency. For those operations, assets and liabilities are translated into U.S. dollars at period-ending exchange rates and revenues and expenses are translated into U.S. dollars using average exchange rates. The resulting translation adjustments are recorded as a component of Accumulated other comprehensive income (loss) in stockholders’ equity. Accordingly, foreign currency exchange gains and losses related to assets, liabilities and transactions denominated in other currencies (principally the Euro) are included in the Statements of Consolidated Operations.

Derivative Instruments — We enter into derivative instruments and hedging activities to manage, where possible and economically efficient, commodity price risk, foreign currency exchange rate risk and interest rate risk related to borrowings. It is our policy to execute such instruments with creditworthy banks and not enter into derivative instruments for speculative purposes. All derivatives are reflected at their fair value and recorded in other current assets and other current liabilities as of December 31, 2013. There were no outstanding derivatives as of December 31, 2014. The accounting for the fair value of a derivative depends upon whether it has been designated as a hedge and on the type of hedging relationship. To qualify for designation in a hedging relationship, specific criteria must be met and appropriate documentation prepared. Changes in the fair values of derivatives not designated in a hedging relationship are recognized in earnings.

From time to time we employ derivative instruments in connection with purchases and sales of inventory in order to establish a fixed margin and mitigate the risk of price volatility. Some customers request fixed pricing and we may use a derivative to mitigate price risk. While this hedging may limit our ability to participate in gains from favorable commodity price fluctuations, it eliminates the risk of loss from adverse commodity price fluctuations.

Periodically, we enter into certain derivative instruments designated as cash flow hedges. For these hedges, the effective portion of the gain or loss from the financial instrument is initially reported as a component of Accumulated other comprehensive income (loss) in stockholders’ equity and subsequently reclassified into earnings in the same line as the hedged item in the same period or periods during which the hedged item affects earnings.

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Income Taxes (Net Deferred Tax Liabilities) (Details) (USD $) In Millions, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013
Components of deferred tax assets and liabilities
Employee benefit accruals	$ 58.6	$ 44.7
Foreign operating loss carryforwards	6.5	8.3
Foreign tax credit carryforwards	17.3	23.1
State operating loss carryforwards	7.8	7.6
Operating accruals	48.4	42.3
Investment credit carryforwards	2.6	3.3
Valuation allowance	(91.9)	(83.6)
Deferred tax assets	49.3	45.7
Depreciation	(31.2)	(37.5)
Amortization	(88.5)	(107.7)
Other	(0.2)	(1.0)
Deferred tax liabilities	(119.9)	(146.2)
Net deferred tax liabilities	(70.6)	(100.5)
Deferred tax assets and liabilities
Other current assets	2.1	2.4
Other non-current assets	5.3	6.4
Other current liabilities	(3.2)	(6.8)
Deferred income taxes — non-current liabilities	(74.8)	(102.5)
Net deferred tax liabilities	$ (70.6)	$ (100.5)

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Quarterly Results of Operations (Unaudited) (Tables)

12 Months Ended

Dec. 31, 2014

Quarterly Financial Information Disclosure [Abstract]

Schedule of Quarterly Results of Operations

	2014
	First Quarter			Second Quarter			Third Quarter		Fourth Quarter			Full Year
Net sales	$	261.7		$	297.5		$	262.9	$	245.4		$	1,067.5
Gross profit	$	61.9		$	63.1		$	62.6	$	50.6		$	238.2
Amounts attributable to OM Group, Inc. common stockholders:
Income (loss) from continuing operations, net of tax	$	5.3		$	5.1		$	6.3	$	(189.0	)	$	(172.3	)
Income (loss) from discontinued operations, net of tax	(0.1		)	(0.3		)	0.1		—			$	(0.3	)
Net income (loss)	$	5.2		$	4.8		$	6.4	$	(189.0	)	$	(172.6	)
Net income (loss) per common share — basic
Continuing operations	$	0.17		$	0.16		$	0.20	$	(6.24	)	$	(5.54	)
Discontinued operations	—			(0.01		)	0.01		—			(0.01		)
Net income (loss)	$	0.17		$	0.15		$	0.21	$	(6.24	)	$	(5.55	)
Net income (loss) per common share — assuming dilution
Continuing operations	$	0.16		$	0.16		$	0.20	$	(6.24	)	$	(5.54	)
Discontinued operations	—			(0.01		)	—		—			(0.01		)
Net income (loss)	$	0.16		$	0.15		$	0.20	$	(6.24	)	$	(5.55	)

The second quarter 2014 includes costs related to cost reduction initiatives of $0.4 million in Specialty Chemicals.

The third quarter 2014 includes costs related to cost optimization and other business improvement initiatives of $0.3 million in Magnetic Technologies, $2.6 million in Battery Technologies, $1.0 million in Specialty Chemicals, and $0.1 million in Corporate, respectively.

The fourth quarter 2014 includes a $195.4 million goodwill and intangible asset non-cash impairment charge in Magnetic Technologies. The fourth quarter 2014 also includes costs related to cost optimization and other business improvement initiatives of $1.6 million in Magnetic Technologies, $0.7 million in Specialty Chemicals, and $0.1 million in Corporate, respectively. There was also a $3.2 million non-cash pension settlement charge in Battery Technologies during the fourth quarter.

	2013
	First Quarter			Second Quarter			Third Quarter			Fourth Quarter			Full Year
Net sales	$	341.8		$	279.5		$	265.7		$	270.5		$	1,157.5
Gross profit	$	74.2		$	63.8		$	65.9		$	54.6		$	258.4
Amounts attributable to OM Group, Inc. common stockholders:
Income (loss) from continuing operations, net of tax	$	(109.5	)	$	8.1		$	12.4		$	17.3		$	(71.7	)
Income (loss) from discontinued operations, net of tax	(0.5		)	(11.4		)	(0.3		)	(0.1		)	(12.3		)
Net income (loss)	$	(110.0	)	$	(3.3	)	$	12.1		$	17.2		$	(84.0	)
Net income (loss) per common share — basic
Continuing operations	$	(3.47	)	$	0.26		$	0.40		$	0.54		$	(2.27	)
Discontinued operations	(0.02		)	(0.36		)	(0.01		)	—			(0.39		)
Net income (loss)	$	(3.49	)	$	(0.10	)	$	0.39		$	0.54		$	(2.66	)
Net income (loss) per common share — assuming dilution
Continuing operations	$	(3.46	)	$	0.26		$	0.39		$	0.54		$	(2.27	)
Discontinued operations	(0.02		)	(0.36		)	(0.01		)	—			(0.39		)
Net income (loss)	$	(3.48	)	$	(0.10	)	$	0.38		$	0.54		$	(2.66	)

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Significant Accounting Policies (Policies)

12 Months Ended

Dec. 31, 2014

Accounting Policies [Abstract]

Principles of Consolidation

Principles of Consolidation — OM Group, Inc. (the “Company”, “we”, “our”, “us”) is a technology-driven industrial company serving attractive global markets, including automotive systems, electronic devices, aerospace and defense, industrial and medical. We use innovative technologies to address customers' complex applications and demanding requirements. Our strategy is to grow organically through product and application innovation and new market and customer development, to grow strategically through complementary acquisitions to build-out our growth platforms, and to maximize total stockholder returns through a combination of business growth, financial discipline, optimal deployment of capital and continued operational excellence. Our objective is to deliver sustainable, profitable growth and create long-term stockholder value. The consolidated financial statements include the accounts of OM Group and its consolidated subsidiaries. We were formed in 1991 as a Delaware Corporation. Intercompany accounts and transactions have been eliminated in consolidation.

Certain financial data may have been rounded. As a result of such rounding, the totals of data presented in this document may vary slightly from the actual arithmetical totals of such data.

Use of Estimates

Use of Estimates - The preparation of financial statements, in conformity with US generally accepted accounting policies ("US GAAP"), requires management to make estimates and assumptions in certain circumstances that affect the amounts reported in the accompanying consolidated financial statements and notes. Actual results could differ from these estimates

Cash Equivalents

Cash Equivalents - All highly-liquid investments, with a maturity of three months or less when purchased, are considered to be cash equivalents

Allowance for Doubtful Accounts

Allowance for Doubtful Accounts - We have recorded an allowance for doubtful accounts to record accounts receivable at their estimated net realizable value. The allowance is based upon an analysis of historical bad debts, a review of the aging of accounts receivable and the current creditworthiness of customers. Accounts are written off against the allowance when it becomes probable that collections will not occur. Trade credit is generally extended on a short-term basis and accounts receivable generally do not bear interest

Inventories

Inventories - Magnetic Technologies' inventories are valued using the average cost method. Cost of sales under the average cost method represents the weighted average cost of the items sold. We believe the average cost method provides for a better matching of inventory costs with related sales based on Magnetic Technologies' manufacturing process. Our remaining inventory is valued using First in, First out (FIFO). Inventory costs include raw materials, labor and manufacturing overhead. Inventory accounted for under the percentage-of-completion method is included in work-in-process inventory and represents accumulated contract costs less the portion of such costs allocated to delivered units. The costs attributed to units delivered are based on the estimated average cost of all units expected to be produced on a contract-by-contract basis.

Changes in the price of rare earth and other materials can have a significant impact on inventory valuation. We evaluate the need for a lower of cost or market (“LCM”) adjustment to inventories based on the selling prices of our finished products generally at the end of the period. To the extent raw material prices increase subsequent to the balance sheet date, we consider these price movements in our LCM evaluation. Declines in the selling prices of our finished goods, which can result from decreases in the market price of raw materials or other factors, can result in our inventory carrying value being written down to a lower market value.

Property, Plant and Equipment

Property, Plant and Equipment - Property, plant and equipment is recorded at historical cost less accumulated depreciation. Depreciation of plant and equipment, including assets recorded under capital leases, is provided by the straight-line method over the useful lives of 5 to 25 years for land improvements, 5 to 40 years for buildings and improvements, 5 to 15 years for machinery and equipment (with the majority in the range of 5 to 10 years), 5 to 10 years for furniture and fixtures and 3 to 5 years for vehicles and computers and related equipment. Leasehold improvements are depreciated over the shorter of the estimated useful life or the term of the lease.

Long-lived Assets other than Goodwill

Long-lived Assets other than Goodwill - Long-lived assets are reviewed for impairment whenever events or changes in circumstances indicate the carrying amount may not be recoverable. Events or circumstances that would result in an impairment review primarily include operating losses, a significant change in the use of an asset, or the planned disposal or sale of the asset. The asset would be considered impaired when the future net undiscounted cash flows generated by the asset are less than its carrying value. An impairment loss would be recognized based on the amount by which the carrying value of the asset exceeds its estimated fair value.

Goodwill and Intangible Assets

Goodwill and Intangible Assets - We evaluate the carrying value of goodwill and indefinite-lived intangible assets for impairment annually as of October 1 and between annual evaluations if changes in circumstances or the occurrence of certain events indicate potential impairment. If the carrying value of goodwill or an indefinite-lived intangible asset exceeds its fair value, an impairment loss is recognized.

Intangible assets consist of (i) definite-lived assets subject to amortization and (ii) indefinite-lived intangible assets not subject to amortization. Definite-lived intangible assets consist principally of customer relationships, developed technology, know-how, capitalized software and license agreements and are being amortized using the straight-line or other appropriate method, if applicable. Indefinite-lived intangible assets consist of tradenames.

Retained Liabilities of Business Sold

Retained Liabilities of Businesses Sold - Retained liabilities of businesses sold include obligations related to our former Precious Metals Group (“PMG”), which was sold in 2003. Under terms of the sale agreement, we will reimburse the buyer of this business for certain items that become due and payable by the buyer subsequent to the sale date. Such items are principally comprised of taxes payable related to periods during which we owned PMG.

Revenue Recognition

Revenue Recognition — Except for revenue recognized under the percentage of completion method of accounting in Battery Technologies (see discussion below), we recognize revenue when persuasive evidence of an arrangement exists, unaffiliated customers take title and assume risk of loss, the sales price is fixed or determinable and collection of the related receivable is reasonably assured. Revenue recognition generally occurs upon shipment of product or usage of inventory consigned to customers. All amounts in a sales transaction billed to a customer related to shipping and handling are reported as sales.

The Battery Technologies segment uses the percentage of completion method to recognize most of its revenue. Most defense contracts use the units-of-delivery method while most space contracts use the cost-to-cost method as the basis to measure progress toward completing a contract. Under the units-of-delivery method, revenues are recognized based on the contract price of units delivered. Under the cost-to-cost method, revenue is recognized based on the ratio of cost incurred compared to management's estimate of total costs expected to be incurred under the contract. The percentage of completion method requires substantial judgment on the part of management due to the duration of the contracts as well as the technical nature of the products involved. Contract revenues and cost estimates are reviewed at least quarterly and adjustments are reflected in the accounting period such amounts are determined. Billings in excess of amounts earned are deferred. Anticipated losses on contracts are recorded in full in the period in which the loss becomes evident.

Cost of Goods Sold

Cost of Goods Sold — Cost of goods sold is comprised of raw material costs, direct production, maintenance and utility costs, depreciation, other overhead costs and shipping and handling costs.

Research and Development

Research and Development — Research and development costs are charged to expense when incurred, are included in selling, general and administrative expenses and amounted to $26.0 million, $26.3 million and $32.2 million in 2014, 2013 and 2012, respectively. These amounts do not include development and application engineering costs incurred in conjunction with fulfilling customer orders and executing projects.

Accounting for Operating Leases

Accounting for Operating Leases — Lease expense is recorded on a straight-line basis. The noncancellable lease term used to calculate the amount of the straight-line expense is generally determined to be the initial lease term, including any optional renewal terms that are reasonably assured. Certain leases include escalating rent provisions and lease incentives which are recognized as lease expense on a straight-line basis over the lease term. Lease payments that depend on an existing index or rate are included in our minimum lease payments that are recognized as lease expense on a straight-line basis over the minimum lease term.

Income Taxes

Income Taxes — Deferred income taxes are provided to recognize the effect of temporary differences between financial and tax reporting. Deferred income taxes are not provided for undistributed earnings of foreign consolidated subsidiaries, to the extent such earnings are determined to be reinvested for an indefinite period of time.

Foreign Currency Translation

Foreign Currency Translation — The functional currency for most of our operating subsidiaries outside of the United States is the applicable local currency. For those operations, assets and liabilities are translated into U.S. dollars at period-ending exchange rates and revenues and expenses are translated into U.S. dollars using average exchange rates. The resulting translation adjustments are recorded as a component of Accumulated other comprehensive income (loss) in stockholders’ equity. Accordingly, foreign currency exchange gains and losses related to assets, liabilities and transactions denominated in other currencies (principally the Euro) are included in the Statements of Consolidated Operations.

Derivative Instruments

Derivative Instruments — We enter into derivative instruments and hedging activities to manage, where possible and economically efficient, commodity price risk, foreign currency exchange rate risk and interest rate risk related to borrowings. It is our policy to execute such instruments with creditworthy banks and not enter into derivative instruments for speculative purposes. All derivatives are reflected at their fair value and recorded in other current assets and other current liabilities as of December 31, 2013. There were no outstanding derivatives as of December 31, 2014. The accounting for the fair value of a derivative depends upon whether it has been designated as a hedge and on the type of hedging relationship. To qualify for designation in a hedging relationship, specific criteria must be met and appropriate documentation prepared. Changes in the fair values of derivatives not designated in a hedging relationship are recognized in earnings.

From time to time we employ derivative instruments in connection with purchases and sales of inventory in order to establish a fixed margin and mitigate the risk of price volatility. Some customers request fixed pricing and we may use a derivative to mitigate price risk. While this hedging may limit our ability to participate in gains from favorable commodity price fluctuations, it eliminates the risk of loss from adverse commodity price fluctuations.

Periodically, we enter into certain derivative instruments designated as cash flow hedges. For these hedges, the effective portion of the gain or loss from the financial instrument is initially reported as a component of Accumulated other comprehensive income (loss) in stockholders’ equity and subsequently reclassified into earnings in the same line as the hedged item in the same period or periods during which the hedged item affects earnings.

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Schedule II - Valuation and Qualifying Accounts

12 Months Ended

Dec. 31, 2014

Valuation and Qualifying Accounts [Abstract]

Schedule II - Valuation and Qualifying Accounts

Schedule II — Valuation and Qualifying Accounts

Years Ended December 31, 2014, 2013 and 2012

	Balance at Beginning of Year		Acquisition / Divestitures				Charged (Credited) to Costs and Expenses			Charged (Credited) to Other Accounts				Deductions				Balance at End of Year
Classifications
2014
Allowance for doubtful accounts	$	3.9	—				$	0.3	(1)	$	(1.2	)	(9)	$	(0.5	)	(4)	$	2.5
Allowance for note receivable	19.1		—				—		(1)	(16.7		)	(8)	—				2.4
Environmental reserve	2.3		—				0.2		(3)	—				(0.7		)	(5)	1.8
	$	25.3	$	—			$	0.5		$	(17.9	)		$	(1.2	)		$	6.7
2013
Allowance for doubtful accounts	$	5.2	$	(1.0	)	(7)	$	0.2	(1)	$	(0.2	)	(6)	$	(0.3	)	(4)	$	3.9
Allowance for note receivable	3.1		—				16.0		(2)	—				—				19.1
Environmental reserve	2.4		—				0.3		(3)	—			(6)	(0.4		)	(5)	2.3
	$	10.7	$	(1.0	)		$	16.5		$	(0.2	)		$	(0.7	)		$	25.3
2012
Allowance for doubtful accounts	$	4.8	$	—			$	0.7	(1)	$	0.1		(6)	$	(0.4	)	(4)	$	5.2
Allowance for note receivable	3.1		—				—		(1)	—				—				3.1
Environmental reserve	2.6		—				0.3		(3)	—			(6)	(0.5		)	(5)	2.4
	$	10.5	$	—			$	1.0		$	0.1			$	(0.9	)		$	10.7

_______________________________________

(1) Provision for uncollectible accounts and notes receivable included in selling, general and administrative expenses.

(2) Note receivable fully reserved at time of sale of cobalt business on March 29, 2013.

(3) Provision for environmental costs included in selling, general and administrative expenses.

(4) Actual accounts written-off against the allowance.

(5) Actual cash expenditures charged against the accrual.

(6) Foreign currency translation adjustment.

(7) Resulting from sale of AM and UPC businesses during 2013.

(8) Relief of note receivable obligation in accordance with compliance on the cobalt supply agreement.

(9) Foreign currency translation adjustment and minor balance sheet reclassification.

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Fair Value Disclosures (Details)	12 Months Ended
	Dec. 31, 2014 USD ($)	Dec. 31, 2013 USD ($)	Dec. 31, 2014 Battery Technologies [Member] customer	Dec. 31, 2013 Battery Technologies [Member] customer	Dec. 31, 2012 Battery Technologies [Member] customer	Dec. 31, 2014 Rahu Catalytics Limited [Member] USD ($)	Dec. 31, 2014 Rahu Catalytics Limited [Member] EUR (€)	Dec. 31, 2013 Rahu Catalytics Limited [Member] USD ($)	Dec. 31, 2013 Rahu Catalytics Limited [Member] EUR (€)	Dec. 31, 2014 Recurring [Member] Contingent Consideration Payable [Member] USD ($)	Dec. 31, 2014 Recurring [Member] Quoted Prices In Active Markets For Identical Assets (Level 1) [Member] Contingent Consideration Payable [Member] USD ($)	Dec. 31, 2014 Recurring [Member] Significant Other Observable Inputs (Level 2) [Member] Contingent Consideration Payable [Member] USD ($)	Dec. 31, 2014 Recurring [Member] Significant Unobservable Inputs (Level 3) [Member] Contingent Consideration Payable [Member] USD ($)
Fair Value, Liabilities Measured on Recurring Basis, Financial Statement Captions [Line Items]
Fair value measurements, total liabilities										$ 1,400,000	$ 0	$ 0	$ 1,400,000
Transfer into or out of fair value measurement	0	0
Initial estimated fair value of contingent consideration based on certain volume targets						24,300,000	20,000,000
Volume targets						15 years	15 years
Revised estimated fair value of contingent consideration based on certain volume targets								1,400,000	1,000,000
Long-term debt, fair value	12,500,000
Long-term debt	$ 0	$ 0
Accounts receivable balance from largest customer, percentage	2.00%	2.00%
Number of customers			3	3	3
Entity wide revenue major customer percentage			49.00%	48.00%	52.00%

XML

Significant Accounting Policies (Narrative) (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended			0 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012	Nov. 24, 2014	Mar. 29, 2013
Related Party Transaction [Line Items]
Percentage of interest in joint venture by the company					55.00%
Noncontrolling interest in joint venture					45.00%
Research and development costs included in selling, general and administrative expenses	$ 26.0	$ 26.3	$ 32.2
Accquirer of PMG [Member]
Related Party Transaction [Line Items]
Retained liabilities of PMG, net liability	11.3	12.3
Indemnification receivables	8.2	9.1
Battery Technologies [Member]
Related Party Transaction [Line Items]
Purchase price total cash consideration				$ 24.6

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Inventories (Tables)

12 Months Ended

Dec. 31, 2014

Inventory, Net [Abstract]

Schedule of Inventory

Inventories consist of the following as of December 31,

	2014		2013
Raw materials and supplies	$	73.6	$	83.3
Work-in-process	118.1		122.2
Finished goods	36.7		35.4
	$	228.4	$	240.9

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Property, Plant and Equipment, net (Tables)

12 Months Ended

Dec. 31, 2014

Property, Plant and Equipment, Net [Abstract]

Property, Plant and Equipment

Property, plant and equipment, net consists of the following as of December 31,

	2014			2013
Land and improvements	$	37.6		$	39.6
Buildings and improvements	138.0			145.8
Machinery and equipment	346.4			350.4
Furniture and fixtures	8.2			7.6
Property, plant and equipment, at cost	530.2			543.4
Less accumulated depreciation	(221.9		)	(197.8		)
	$	308.3		$	345.6

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Statements of Consolidated Total Stockholders' Equity (USD $) In Millions, except Share data in Thousands, unless otherwise specified	Total	Share Based Compensation Expense Employees [Member]	Director [Member]	Noncontrolling Interests [Member]	OM Group Inc. Stockholders' Equity [Member]	Common Stock [Member]	Capital in Excess of Par Value [Member]	Capital in Excess of Par Value [Member] Share Based Compensation Expense Employees [Member]	Capital in Excess of Par Value [Member] Director [Member]	Retained Earnings [Member]	Treasury Stock [Member]	Accumulated Other Comprehensive Income (Loss) [Member]
Beginning balance at Dec. 31, 2011				$ 44.5		$ 0.3	$ 625.5			$ 709.9	$ (7.4)	$ (93.4)
Beginning balance, shares at Dec. 31, 2011						31,865
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Shares repurchased						(9)
Shares issued under share-based compensation plans						50
Shares issued (rounds to less than $0.1)						0
Shares issued under share-based compensation plans							0
Share-based compensation expense		(5.2)	(0.5)					5.0	0.5
Loss attributable to OM Group, Inc. common stockholders	(38.7)									(38.7)
Common stock cash dividends										0
Reacquired shares											(0.3)
Foreign currency translation	20.7											20.7
Reclassification of hedging into earnings, net of tax												(1.9)
Unrealized (loss) gain on cash flow hedges, net of tax	5.9											5.9
Pension and post-retirement obligation, net of tax	(19.3)											(19.3)
Loss attributable to the noncontrolling interest	7.1			(7.1)
Sale of noncontrolling interest				0
Ending balance at Dec. 31, 2012	1,244.3			37.4	1,206.9	0.3	631.1			671.2	(7.7)	(88.0)
Ending balance, shares at Dec. 31, 2012						31,906
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Shares repurchased						(609)
Shares issued under share-based compensation plans						182
Shares issued (rounds to less than $0.1)						0
Shares issued under share-based compensation plans							2.8
Share-based compensation expense		(5.7)	(0.5)					5.4	0.5
Loss attributable to OM Group, Inc. common stockholders	(84.0)									(84.0)
Common stock cash dividends										0
Reacquired shares											(14.6)
Foreign currency translation	25.0											25.0
Reclassification of hedging into earnings, net of tax												0.2
Unrealized (loss) gain on cash flow hedges, net of tax	(0.3)											(0.3)
Pension and post-retirement obligation, net of tax	17.9											17.9
Loss attributable to the noncontrolling interest	1.8			0
Sale of noncontrolling interest				(37.4)
Ending balance at Dec. 31, 2013	1,159.8			0	1,159.8	0.3	639.8			587.2	(22.3)	(45.2)
Ending balance, shares at Dec. 31, 2013						31,479
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Shares repurchased						(1,310)
Shares issued under share-based compensation plans						103
Shares issued (rounds to less than $0.1)						0
Shares issued under share-based compensation plans							0.5
Share-based compensation expense		(7.1)	(0.5)					6.5	0.5
Loss attributable to OM Group, Inc. common stockholders	(172.6)									(172.6)
Common stock cash dividends										(9.3)
Reacquired shares											(35.9)
Foreign currency translation	(81.7)											(81.7)
Reclassification of hedging into earnings, net of tax												0.2
Unrealized (loss) gain on cash flow hedges, net of tax	0											0
Pension and post-retirement obligation, net of tax	(31.1)											(31.1)
Loss attributable to the noncontrolling interest	0			0
Sale of noncontrolling interest				0
Ending balance at Dec. 31, 2014	$ 836.9			$ 0	$ 836.9	$ 0.3	$ 647.3			$ 405.3	$ (58.2)	$ (157.8)
Ending balance, shares at Dec. 31, 2014						30,272

XML

Acquisitions and Divestitures (Tables)

12 Months Ended

Dec. 31, 2014

Business Combinations [Abstract]

Schedule of Disposal Groups, Including Discontinued Operations, Income Statement, Balance Sheet and Additional Disclosures

A summary of our discontinued operations activity is as follows:

	Twelve Months Ended December 31
(In millions except per share data)		2014			2013			2012
Net Sales		$	—		$	38.3		$	93.4
Loss from operations of divested business (net of tax)		$	(0.1	)	$	(2.5	)	$	(0.4	)
Loss on disposal of business (net of tax)		(0.2		)	(9.8		)	—
Loss from discontinued operations (net of tax)		$	(0.3	)	$	(12.3	)	$	(0.4	)
Loss per share from discontinued operations (net of tax)
Basic and diluted		$	(0.01	)	$	(0.39	)	$	(0.01	)

XML

Share-Based Compensation (Schedule of Performance-Based and Time-Based Shares Vested and Issued) (Details) (US Time-Based Awards [Member])	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vested based on meeting performance criteria	50,895
Shares surrendered to pay withholding taxes	(18,069)	(19,645)	(8,538)
Net shares issued	32,826	36,832	16,329
Three Year Vesting [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vested based on meeting performance criteria	50,895	54,300	22,100
One Year Vesting [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vested based on meeting performance criteria	0	2,177	2,767

XML

Share-Based Compensation (Tables)

12 Months Ended

Dec. 31, 2014

Share-based Compensation [Abstract]

Summary of Share-Based Compensation Expense

Set forth below is a summary of share-based compensation expense for option grants, restricted stock awards and restricted stock unit awards included as a component of Selling, general and administrative expenses in the Statements of Consolidated Operations for the year ended December 31:

	2014		2013		2012
Stock options and restricted stock awards	$	6.5	$	5.4	$	5.0
Restricted stock unit awards	0.6		0.3		0.2
Share-based compensation expense - employees	$	7.1	$	5.7	$	5.2
Share-based compensation expense - non-employee directors	$	0.5	$	0.5	$	0.5

Schedule of Share-Based Compensation Stock Options Valuation Assumptions

The fair value of options was estimated at the date of grant using a Black-Scholes options pricing model with the following weighted-average assumptions:

	2014			2013			2012
Risk-free interest rate	1.9		%	1.1		%	1.1		%
Dividend yield	0.9		%	—			—
Volatility factor of Company common stock	56		%	54		%	55		%
Weighted-average expected option term (years)	6			6			6
Weighted-average grant-date fair value	$	15.03		$	13.49		$	15.29

Number of Options Shares and Weighted-Average Grant-Date Fair Value

The following table sets forth the number of option shares and weighted-average grant-date fair value:

	Shares		Weighted-Average Fair Value at Grant Date
Non-vested at December 31, 2012	442,626		$	17.20
Granted during 2013	273,200		13.49
Vested during 2013	(214,816	)	17.37
Forfeited during 2013	(64,983	)	16.02
Non-vested at December 31, 2013	436,027		14.78
Granted during 2014	230,300		15.03
Vested during 2014	(218,532	)	15.18
Forfeited during 2014	(26,581	)	14.74
Non-vested at December 31, 2014	421,214		$	14.36

Summary of Stock Option Activity

A summary of our stock option activity for 2014 is as follows:

	Shares		Weighted Average Exercise Price		Weighted Average Remaining Contractual Term	Aggregate Intrinsic Value
Outstanding at January 1, 2014	1,308,573		$	34.81
Granted	230,300		32.06
Exercised	(18,764	)	28.03
Expired unexercised	(36,201	)	38.91
Forfeited	(26,581	)	29.96
Outstanding at December 31, 2014	1,457,327		$	32.97	5.4	$	7.9
Vested or expected to vest at December 31, 2014	1,431,451		$	33.04	5.4	$	7.7
Exercisable at December 31, 2014	1,042,314		$	34.30	4.2	$	4.4

Summary of Performance-Based Restricted Stock Awards and Stock Unit Awards

A summary of our Performance-Based Awards for 2014 is as follows:

	International Restricted Stock Units		US Shares of Restricted Stock		Weighted Average Grant Date Fair Value
Non-vested at January 1, 2014	61,250		435,090		$	29.56
Granted	24,175		206,225		32.20
Vested	(850	)	(18,194	)	36.51
Forfeited	(12,183	)	(125,617	)	33.63
Non-vested at December 31, 2014	72,392		497,504		$	29.37
Expected to vest as of December 31, 2014	9,516		57,189

Schedule of Time-Based Restricted Stock Awards and Stock Unit Awards

A summary of our Time-Based awards for 2014 is as follows:

	Time-Based International RSUs		Shares of US Time-Based Awards		Weighted Average Grant Date Fair Value - US Time-Based Awards
Non-vested at January 1, 2014	16,330		180,560		$	29.26
Granted - three year vesting	6,050		18,525		32.17
Vested	(6,220	)	(50,895	)	35.99
Forfeitures	(1,085	)	(13,020	)	29.63
Non-vested at December 31, 2014	15,075		135,170		$	27.08
Expected to vest as of December 31, 2014	13,967		130,174

Schedule of Time-Based Shares Vested and Issued

The following US Time-Based Awards vested and were issued in the respective years ended December 31:

	2014		2013		2012
Vested - three year vesting period	50,895		54,300		22,100
Vested -one year vesting period	—		2,177		2,767
Shares surrendered to pay withholding taxes	(18,069	)	(19,645	)	(8,538	)
Net shares issued	32,826		36,832		16,329

XML

Debt (Details) (USD $)	12 Months Ended			0 Months Ended		6 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012	Sep. 04, 2013	Sep. 04, 2013	Jun. 30, 2013	Sep. 30, 2014
Line of Credit Facility [Line Items]
Line of credit amount outstanding							$ 12,500,000
Interest paid on long term debt	0	6,900,000	38,400,000
Interest expense		1,000,000	2,500,000
Interest costs capitalized	0	0	0
Revolving Credit Facility [Member]
Line of Credit Facility [Line Items]
Term of debt instrument				5 years
Undrawn revolving credit facility				350,000,000	350,000,000
Increase limit of borrowing capacity on credit facility				150,000,000	150,000,000
Voting capital stock percentage of certain foreign subsidiaries				65.00%	65.00%
Percentage of pledge of voting capital stock subject to certain exceptions				100.00%
Revolving Credit Facility [Member] | London Interbank Offered Rate (LIBOR) [Member] | Variable Spread [Member] | Minimum [Member]
Line of Credit Facility [Line Items]
Percentage of interest rate for base rate loans					1.125%
Revolving Credit Facility [Member] | London Interbank Offered Rate (LIBOR) [Member] | Variable Spread [Member] | Maximum [Member]
Line of Credit Facility [Line Items]
Percentage of interest rate for base rate loans					2.00%
Revolving Credit Facility [Member] | Adjusted Base Rate Advances [Member] | Federal Funds Rate [Member]
Line of Credit Facility [Line Items]
Percentage of interest rate for base rate loans					0.50%
Revolving Credit Facility [Member] | Adjusted Base Rate Advances [Member] | London Interbank Offered Rate (LIBOR) [Member]
Line of Credit Facility [Line Items]
Percentage of interest rate for base rate loans					1.00%
Revolving Credit Facility [Member] | Adjusted Base Rate Advances [Member] | Applicable Margin [Member] | Minimum [Member]
Line of Credit Facility [Line Items]
Percentage of interest rate for base rate loans					0.125%
Revolving Credit Facility [Member] | Adjusted Base Rate Advances [Member] | Applicable Margin [Member] | Maximum [Member]
Line of Credit Facility [Line Items]
Percentage of interest rate for base rate loans					1.00%
Term A Facility [Member]
Line of Credit Facility [Line Items]
Write off of deferred financing fees						10,300,000
Term B Facility [Member]
Line of Credit Facility [Line Items]
Write off of deferred financing fees						$ 1,500,000

XML

Pension and Other Post-Retirement Benefit Plans (Schedule of Fair Value of Plan Assets) (Details) (Pension Plans [Member], USD $) In Millions, unless otherwise specified	Dec. 31, 2014
Defined Benefit Plan Disclosure [Line Items]
Fair value of plans assets	$ 157.2
Quoted Prices In Active Markets For Identical Assets (Level 1) [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plans assets	5.6
Significant Other Observable Inputs (Level 2) [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plans assets	151.6
Significant Unobservable Inputs (Level 3) [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plans assets	0
Equity Securities - US [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plans assets	21.2
Equity Securities - US [Member] | Quoted Prices In Active Markets For Identical Assets (Level 1) [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plans assets	3.9
Equity Securities - US [Member] | Significant Other Observable Inputs (Level 2) [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plans assets	17.3
Equity Securities - US [Member] | Significant Unobservable Inputs (Level 3) [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plans assets	0
Non-US Equity Securities [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plans assets	15.4
Non-US Equity Securities [Member] | Quoted Prices In Active Markets For Identical Assets (Level 1) [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plans assets	0
Non-US Equity Securities [Member] | Significant Other Observable Inputs (Level 2) [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plans assets	15.4
Non-US Equity Securities [Member] | Significant Unobservable Inputs (Level 3) [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plans assets	0
Bonds [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plans assets	88.6
Bonds [Member] | Quoted Prices In Active Markets For Identical Assets (Level 1) [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plans assets	0
Bonds [Member] | Significant Other Observable Inputs (Level 2) [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plans assets	88.6
Bonds [Member] | Significant Unobservable Inputs (Level 3) [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plans assets	0
Other Fixed Income [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plans assets	4.3
Other Fixed Income [Member] | Quoted Prices In Active Markets For Identical Assets (Level 1) [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plans assets	0
Other Fixed Income [Member] | Significant Other Observable Inputs (Level 2) [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plans assets	4.3
Other Fixed Income [Member] | Significant Unobservable Inputs (Level 3) [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plans assets	0
High Yield [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plans assets	7.2
High Yield [Member] | Quoted Prices In Active Markets For Identical Assets (Level 1) [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plans assets	0
High Yield [Member] | Significant Other Observable Inputs (Level 2) [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plans assets	7.2
High Yield [Member] | Significant Unobservable Inputs (Level 3) [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plans assets	0
TIPS [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plans assets	6.7
TIPS [Member] | Quoted Prices In Active Markets For Identical Assets (Level 1) [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plans assets	0
TIPS [Member] | Significant Other Observable Inputs (Level 2) [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plans assets	6.7
TIPS [Member] | Significant Unobservable Inputs (Level 3) [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plans assets	0
Global REITS [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plans assets	7.0
Global REITS [Member] | Quoted Prices In Active Markets For Identical Assets (Level 1) [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plans assets	0
Global REITS [Member] | Significant Other Observable Inputs (Level 2) [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plans assets	7.0
Global REITS [Member] | Significant Unobservable Inputs (Level 3) [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plans assets	0
Non-US Assets [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plans assets	5.1
Non-US Assets [Member] | Quoted Prices In Active Markets For Identical Assets (Level 1) [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plans assets	0
Non-US Assets [Member] | Significant Other Observable Inputs (Level 2) [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plans assets	5.1
Non-US Assets [Member] | Significant Unobservable Inputs (Level 3) [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plans assets	0
Cash and Cash Equivalents [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plans assets	1.7
Cash and Cash Equivalents [Member] | Quoted Prices In Active Markets For Identical Assets (Level 1) [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plans assets	1.7
Cash and Cash Equivalents [Member] | Significant Other Observable Inputs (Level 2) [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plans assets	0
Cash and Cash Equivalents [Member] | Significant Unobservable Inputs (Level 3) [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plans assets	$ 0

XML

Consolidated Balance Sheets (USD $) In Millions, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013
Current assets
Cash and cash equivalents	$ 91.7	$ 118.4
Accounts receivable, less allowance of $2.5 in 2014 and $3.9 in 2013	134.5	150.7
Inventories	228.4	240.9
Other current assets	21.5	32.3
Total current assets	476.1	542.3
Property, plant and equipment, net	308.3	345.6
Goodwill	252.6	432.7
Intangible assets, net	324.8	403.0
Other non-current assets	57.7	59.5
Total assets	1,419.5	1,783.1
Current liabilities
Revolving credit facility	12.5	0
Accounts payable	74.7	93.6
Accrued income taxes	5.6	4.2
Accrued employee costs	34.9	36.2
Purchase price of VAC payable to seller	46.2	52.5
Other current liabilities	51.8	59.2
Total current liabilities	225.7	245.7
Deferred income taxes	74.8	102.5
Pension liabilities	244.4	220.5
Purchase price of VAC payable to seller	0	11.3
Other non-current liabilities	37.7	43.3
Stockholders’ equity:
Preferred stock, $.01 par value: Authorized 2,000,000 shares, no shares issued or outstanding	0	0
Common stock, $.01 par value: Authorized 90,000,000 shares; 32,408,222 shares issued in 2014 and 32,304,490 shares issued in 2013	0.3	0.3
Capital in excess of par value	647.3	639.8
Retained earnings	405.3	587.2
Treasury stock (2,136,116 shares in 2014 and 825,956 shares in 2013, at cost)	(58.2)	(22.3)
Accumulated other comprehensive loss	(157.8)	(45.2)
Total stockholders' equity	836.9	1,159.8
Total liabilities and stockholders' equity	$ 1,419.5	$ 1,783.1

XML

Significant Accounting Policies (Property, Plant and Equipment) (Details)	12 Months Ended
	Dec. 31, 2014
Minimum [Member] | Land Improvements [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment useful life (in years)	5 years
Minimum [Member] | Buildings and Improvements [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment useful life (in years)	5 years
Minimum [Member] | Machinery and Equipment [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment useful life (in years)	5 years
Minimum [Member] | Furniture and Fixtures [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment useful life (in years)	5 years
Minimum [Member] | Vehicles, Computers and Related Equipment [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment useful life (in years)	3 years
Maximum [Member] | Land Improvements [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment useful life (in years)	25 years
Maximum [Member] | Buildings and Improvements [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment useful life (in years)	40 years
Maximum [Member] | Machinery and Equipment [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment useful life (in years)	15 years
Maximum [Member] | Furniture and Fixtures [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment useful life (in years)	10 years
Maximum [Member] | Vehicles, Computers and Related Equipment [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment useful life (in years)	5 years
Majority Minimum [Member] | Machinery and Equipment [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment useful life (in years)	5 years
Majority Maximum [Member] | Machinery and Equipment [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment useful life (in years)	10 years

XML

Statements of Consolidated Cash Flows (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Operating activities
Consolidated net loss	$ (172.6)	$ (85.8)	$ (45.8)
Adjustments to reconcile consolidated net loss to net cash provided by operating activities:
Loss from discontinued operations	0.3	12.3	0.4
Depreciation and amortization	67.5	73.9	84.3
Goodwill and intangible asset impairment charges	195.4	0	0
Share-based compensation expense	7.6	6.2	5.8
Foreign exchange loss (gain)	6.5	(8.0)	0.8
Deferred income tax benefit	(17.2)	(7.3)	(30.2)
VAC lower of cost or market (LCM) charges	0	0	78.4
(Gain) loss on divestiture of Advanced Materials business	(1.7)	111.6	0
Adjustment to contingent consideration	0	(13.0)	0
Other non-cash items	9.0	5.5	0.1
Changes in operating assets and liabilities, excluding the effect of business acquisitions:
Accounts receivable	11.5	(22.3)	39.4
Inventories (includes $18.4 million of step-up amortization in 2012)	3.8	25.0	75.7
Accounts payable	(15.5)	12.5	(43.0)
Refundable, prepaid and accrued income taxes	1.8	(21.1)	41.2
Other, net	(11.0)	(26.6)	2.4
Net cash provided by operating activities	85.4	62.9	209.5
Investing activities
Expenditures for property, plant and equipment	(34.5)	(53.1)	(67.6)
Cash (paid) for acquisitions or received from purchase adjustments	(24.6)	0	6.0
Other, net	1.0	(5.0)	5.1
Net cash provided by (used for) investing activities	(58.1)	333.9	(56.5)
Financing activities
Dividends paid	(9.3)	0	0
Payments on long-term debt	0	(466.5)	(213.5)
Proceeds from revolving line of credit	14.5	0	0
Payments on revolving line of credit	(2.0)	0	0
Payments related to VAC purchase price payable	(16.2)	(23.0)	0
Debt issuance costs	(0.1)	(2.3)	0
Payment related to surrendered shares	(0.7)	(0.6)	(0.3)
Share repurchases	(35.2)	(14.1)	0
Proceeds from exercise of stock options	0.5	2.8	0
Net cash used for financing activities	(48.5)	(503.7)	(213.8)
Effect of exchange rate changes on cash	(4.7)	0.6	1.4
Cash and cash equivalents
Decrease from continuing operations	(25.9)	(106.3)	(59.4)
Discontinued operations — net cash provided by (used) for operating activities	(0.8)	(0.5)	(1.0)
Discontinued operations — net cash used for investing activities	0	(2.4)	(4.1)
Balance at the beginning of the year	118.4	227.6	292.1
Balance at the end of the year	91.7	118.4	227.6
Advanced Materials [Member]
Investing activities
Proceeds from divestiture of businesses	0	328.7	0
UPC Business [Member]
Investing activities
Proceeds from divestiture of businesses	$ 0	$ 63.3	$ 0

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Income Taxes (Income Tax Expense (Benefit)) (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Current tax provision (benefit):
Federal	$ 1.4	$ 0.6	$ (3.1)
State and local	0.2	0	0
Outside the United States	15.1	17.4	30.1
Total current	16.7	18.0	27.0
Deferred tax provision (benefit):
United States	(1.4)	0.6	2.4
Outside the United States	(15.8)	(7.9)	(32.6)
Total deferred	(17.2)	(7.3)	(30.2)
Income tax expense (benefit)	$ (0.5)	$ 10.7	$ (3.2)

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Fair Value Disclosures (Tables)

12 Months Ended

Dec. 31, 2014

Fair Value, Assets, Liabilities and Stockholders' Equity Measured on Recurring Basis [Abstract]

Assets and Liabilities Accounted for at Fair Value on a Recurring Basis

The following table shows the Company’s assets and liabilities accounted for at fair value on a recurring basis:

			Fair Value Measurements at Reporting Date Using
			Quoted Prices in Active Markets for Identical Assets	Significant Other Observable Inputs	Significant Unobservable Inputs
Description	December 31, 2014		(Level 1)	(Level 2)	(Level 3)
Liabilities:
Contingent consideration payable	$	1.4	—	—	1.4

Schedule of Changes in Level 3 Liabilities Measure at Fair Value on a Recurring Basis

The following table summarizes changes in Level 3 liabilities measure at fair value on a recurring basis:

	Contingent Consideration
Fair Value at December 31, 2013	$	1.4
Accretion expense	0.2
Foreign exchange	(0.2		)
Fair Value at December 31, 2014	$	1.4

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Pension and Other Post-Retirement Benefit Plans (Narrative) (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Defined Benefit Plan Disclosure [Line Items]
Aggregate defined contribution plan expenses	$ 3.3	$ 4.7	$ 4.9
U.S. Pension Plans [Member]
Defined Benefit Plan Disclosure [Line Items]
Settlements plan assets	29.6	0
Settlement charge	(3.2)	0	0
Expected employer contribution in 2014	0.7
EPT Pension Plans [Member]
Defined Benefit Plan Disclosure [Line Items]
Percentage of U.S. plan assets	93.00%
Non-U.S. Pension Plans [Member]
Defined Benefit Plan Disclosure [Line Items]
Settlements plan assets	0	0
Expected employer contribution in 2014	10.7
Battery Technologies [Member]
Defined Benefit Plan Disclosure [Line Items]
Settlement charge	$ 3.2
EaglePicher Technologies [Member]
Defined Benefit Plan Disclosure [Line Items]
Number of benefit plans assumed in acquisition	4
Number of frozen defined benefit pension plans with liabilities company assumed in acquisition	2

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Share-Based Compensation

12 Months Ended

Dec. 31, 2014

Share-based Compensation [Abstract]

Share-Based Compensation

Share-Based Compensation

On May 13, 2014, our stockholders approved the 2014 Equity and Incentive Compensation Plan (the “2014 Plan”). The 2014 Plan supersedes and replaces the 2007 Incentive Compensation Plan (the “2007 Plan”), which terminated upon the approval of the 2014 Plan. No further grants may be made under the 2007 plan.  The termination of the 2007 Plan will not impact outstanding awards issued as part of the 2007 Plan. 

Under the 2014 Plan, we may provide equity-based compensation in the form of stock options, stock appreciation rights (or SARs), restricted stock, restricted stock units (or RSUs), performance shares, performance units, dividend equivalents and other stock or stock-based awards to selected employees and non-employee directors.   The 2014 Plan also provides for the issuance of common stock to non-employee directors as all or part of their annual compensation for serving as directors, as may be determined by the board of directors.

The total number of shares of common stock available for awards under the 2014 Plan (including any annual stock issuances made to non-employee directors) is 2,550,000.  Awards other than stock options and SARs will be counted against the aggregate share limit as 1.79 shares of common stock.  Under the 2014 Plan, no more than 1,424,581 shares of common stock could be issued in settlement of restricted stock unit (“RSU”) awards.  In addition, no person will be granted (i) stock options or SARs, in the aggregate, for more than 400,000 shares of common stock during any calendar year or (ii) awards of restricted stock, RSUs, performance shares or other stock-based awards intended to qualify as “qualified performance-based compensation” under Section 162(m) of the Internal Revenue Code, in the aggregate, for more than 400,000 shares of common stock during any calendar year.

The 2014 Plan and the 2007 Plan provide that all options granted must have an exercise price of not less than the per share fair market value on the date of grant and that no option may have a term of more than ten years. We satisfy stock option exercises and restricted stock awards through the issuance of authorized but unissued shares or treasury shares.

Set forth below is a summary of share-based compensation expense for option grants, restricted stock awards and restricted stock unit awards included as a component of Selling, general and administrative expenses in the Statements of Consolidated Operations for the year ended December 31:

	2014		2013		2012
Stock options and restricted stock awards	$	6.5	$	5.4	$	5.0
Restricted stock unit awards	0.6		0.3		0.2
Share-based compensation expense - employees	$	7.1	$	5.7	$	5.2
Share-based compensation expense - non-employee directors	$	0.5	$	0.5	$	0.5

No tax benefit for share-based compensation was realized during 2014, 2013 or 2012 as a result of the valuation allowance against U.S. deferred tax assets.

At December 31, 2014, there was $6.3 million of unrecognized compensation expense related to unvested share-based awards. That cost is expected to be recognized as follows: $4.6 million in 2015, $1.6 million in 2016 and $0.1 million in 2017 as a component of Selling, general and administrative expenses. Unearned compensation expense is recognized over the vesting period for the particular grant. Total unrecognized compensation cost will be adjusted for future changes in actual and estimated forfeitures, updated vesting assumptions for the performance awards, and fluctuations in the fair value of restricted stock unit awards.

Our non-employee directors are paid a portion of their annual retainer in unrestricted shares of common stock which are valued as of the last trading date of the quarter. For purposes of determining the number of shares of common stock to be issued prior to May 13, 2014, the 2007 plan provides that shares are to be valued at the average of the high and low sale price of the Company’s common stock on the New York Stock Exchange ("NYSE"). Pursuant to the 2007 plan we issued 7,084 shares in the six months ended June 30, 2014 and 18,069 shares and 23,752 shares in the 12 months ended December 31, 2013 and 2012, respectively, to non-employee directors. For purposes of determining the number of shares of common stock to be issued subsequent to May 13, 2014, the 2014 plan provides that shares are to be valued at the closing sale price of the Company’s common stock on the NYSE. Pursuant to the 2014 plan, we issued 8,795 shares in the 12 months ended December 31, 2014.

Stock Options

Options granted generally vest in equal increments over a three-year period from the grant date. Upon any change in control of the Company, as defined in the applicable plan, or upon death, disability or retirement, the stock options become 100% vested and exercisable. We account for options that vest over more than one year as one award and recognize expense related to those awards on a straight-line basis over the vesting period.

During 2014, 2013 and 2012, we granted stock options to purchase 230,300, 273,200 and 238,319 shares of common stock, respectively. Included in the 2012 grants are stock options to purchase4,419 shares of common stock with a vesting period of one year, which were granted to our Chief Executive Officer (“CEO”) in connection with achievement of financial performance criteria in 2011 under our then high-performance incentive plan.

The fair value of options was estimated at the date of grant using a Black-Scholes options pricing model with the following weighted-average assumptions:

	2014			2013			2012
Risk-free interest rate	1.9		%	1.1		%	1.1		%
Dividend yield	0.9		%	—			—
Volatility factor of Company common stock	56		%	54		%	55		%
Weighted-average expected option term (years)	6			6			6
Weighted-average grant-date fair value	$	15.03		$	13.49		$	15.29

The risk-free interest rate assumption is based upon the U.S. Treasury yield curve appropriate for the term of the options being valued. The dividend yield assumption was ninety-four hundredths for the awards in 2014 due to the initiation of a dividend by the Company. The dividend assumption was previously zero based on the historical expectation of retaining earnings for use in operations at the time of the award issuances in 2013 and 2012. Expected volatilities are based on historical volatility of our common stock. The expected term of options granted is determined using the simplified method allowed by Staff Accounting Bulletin (“SAB”) No. 110 as historical data was not sufficient to provide a reasonable estimate. Under this approach, the expected term is presumed to be the mid-point between the vesting date and the end of the contractual term.    

The following table sets forth the number of option shares and weighted-average grant-date fair value:

	Shares		Weighted-Average Fair Value at Grant Date
Non-vested at December 31, 2012	442,626		$	17.20
Granted during 2013	273,200		13.49
Vested during 2013	(214,816	)	17.37
Forfeited during 2013	(64,983	)	16.02
Non-vested at December 31, 2013	436,027		14.78
Granted during 2014	230,300		15.03
Vested during 2014	(218,532	)	15.18
Forfeited during 2014	(26,581	)	14.74
Non-vested at December 31, 2014	421,214		$	14.36

A summary of our stock option activity for 2014 is as follows:

	Shares		Weighted Average Exercise Price		Weighted Average Remaining Contractual Term	Aggregate Intrinsic Value
Outstanding at January 1, 2014	1,308,573		$	34.81
Granted	230,300		32.06
Exercised	(18,764	)	28.03
Expired unexercised	(36,201	)	38.91
Forfeited	(26,581	)	29.96
Outstanding at December 31, 2014	1,457,327		$	32.97	5.4	$	7.9
Vested or expected to vest at December 31, 2014	1,431,451		$	33.04	5.4	$	7.7
Exercisable at December 31, 2014	1,042,314		$	34.30	4.2	$	4.4

The fair value of options that vested during 2014, 2013 and 2012 was $3.3 million, $3.7 million and $3.5 million, respectively. The intrinsic value of options exercised in 2014 and 2013 was $0.1 million and $1.2 million, respectively. No stock options were exercised in 2012. The intrinsic value of an option represents the amount by which the market value of the stock exceeds the exercise price of the option.

We received cash payments of $0.5 million and $2.8 million in 2014 and 2013, respectively, in connection with the exercise of stock options previously granted. The Company does not settle stock options for cash.

Restricted Stock 

We issue restricted stock and, beginning in 2012, issue stock-settled restricted stock units to our employees in the U.S (“Restricted Stock," and "US-Based RSUs," respectively). We issue restricted stock units to employees outside the U.S. ("International RSUs"). Certain of the Restricted Stock, US-Based RSUs, and International RSU awards contain time-based vesting conditions and certain of the awards contain performance-based vesting conditions.

The Restricted Stock and US-Based RSU awards are in all cases settled in our common stock. The value of the Restricted Stock and US-Based RSU awards are based upon the market price of an unrestricted share of our common stock at the date of grant. We recognize compensation expense ratably over the requisite performance period based upon the number of awards that are anticipated to vest. The number of awards anticipated to vest is evaluated quarterly and compensation expense is adjusted accordingly. We may withhold shares issued upon vesting if directed by individual employees as a means of meeting minimum statutory tax withholding requirements. We hold the surrendered shares as treasury stock.

The International RSUs are settled in a cash payment that is based on the market price of an unrestricted share of our common stock at the vesting date. Since the awards will be settled in cash, they are treated as a liability award in accordance with the “Stock Compensation” topic of the ASC and are presented as a component of Other non-current liabilities on the Consolidated Balance Sheets. During the vesting period we remeasure the fair value of the International RSUs at each reporting date until the award is settled. Fluctuations in the fair value of the International RSUs are recorded as increases or decreases to compensation expense. Over the life of these awards, the cumulative amount of compensation expense recognized will match the actual cash paid.

Performance-Based Awards

During 2014, 2013 and 2012, we awarded 206,225, 245,950 and 130,500 shares, respectively, of performance-based Restricted stock to U.S. employees and 24,175, 35,150, and 33,450 performance-based International RSUs, respectively, to employees outside the U.S. (collectively "Performance-Based Awards").

The number of Performance-Based Awards that ultimately vest is based upon our achievement of specific measurable financial performance criteria. A recipient of Performance-Based Awards may earn a total award ranging from 0% to 100% of the initial grant, with the target being 50% of the initial grant. The Performance-Based Awards granted during 2013 and 2014 will vest upon the satisfaction of established performance criteria based on average return on net assets and the performance of our share price as compared to the performance of the Russell 2000 unweighted index over a three-year performance period ending December 31, 2015 and 2016, respectively.

The performance period for Performance-Based Awards granted during 2012 ended on December 31, 2014. The vesting of these awards was based on the achievement of consolidated EBITDA margin percentage measured against a predetermined peer group, and average return on net assets, in each case over three-year performance periods ending December 31, 2014. Based upon our performance against the stated performance objectives, 4% of the Performance-Based Awards granted in 2012 remain available to vest, or roughly 3,927 shares of Restricted Stock and 548 International RSUs. Vesting is conditional on approval from the Compensation Committee that the performance objectives were satisfied. The Compensation Committee makes this determination in the first quarter of 2015.

The performance period for Performance-Based Awards granted during 2011 ended on December 31, 2013. The vesting of these awards was based on the achievement of consolidated EBITDA margin percentage (as defined above) measured against a predetermined peer group, and average return on net assets, in each case over three-year performance periods ending December 31, 2013. Based upon our performance against the stated performance objectives, 20% of the Performance-Based Awards granted in 2011 vested, or roughly 18,194 shares of Restricted Stock and 850 International RSUs. The Compensation Committee approved this vesting in the first quarter of 2014.

Upon any change in control of the Company, as defined in the plan, the Performance-Based Awards under the terms of the award agreements vest at the target level. In the event of retirement, death, or disability, a pro rata number of Performance-Based Awards shall remain eligible for vesting at the end of the performance period.

A summary of our Performance-Based Awards for 2014 is as follows:

	International Restricted Stock Units		US Shares of Restricted Stock		Weighted Average Grant Date Fair Value
Non-vested at January 1, 2014	61,250		435,090		$	29.56
Granted	24,175		206,225		32.20
Vested	(850	)	(18,194	)	36.51
Forfeited	(12,183	)	(125,617	)	33.63
Non-vested at December 31, 2014	72,392		497,504		$	29.37
Expected to vest as of December 31, 2014	9,516		57,189

For awards granted prior to 2011, no performance-based shares vested and were issued in 2014, 2013 or 2012.

Time-Based Awards

In 2014, 2013 and 2012 we awarded 18,525, 60,000 and 69,327 time-based restricted stock units (RSUs); in 2012 we issued 20,000 shares of time-based restricted stock, respectively (collectively "US Time-Based Awards"). Included in the 2012 grant are 2,177 units of time-based awards with a vesting period of one year, which were granted to our Chief Executive Officer ("CEO") in connection with achievement of financial performance criteria under our then high performance annual incentive program. The value of the restricted stock units and restricted stock awarded in 2014, 2013 and 2012, based upon the market price of an unrestricted share of our common stock at the date of grant, was $0.6 million, $1.5 million and $2.6 million, respectively. During 2014, 2013 and 2012, we also awarded 6,050, 7,950, and 17,060 Time-Based International RSUs, respectively.

The US Time-Based Awards and Time-Based International RSUs have similar terms and vest three years from the date of grant, subject to the recipient remaining employed by the Company on that date. Upon any change in control of the Company, as defined in the plan, or upon retirement, the Time-Based Awards become 100% vested. A pro rata number of Time-Based Awards will vest in the event of death or disability prior to the stated vesting date.

A summary of our Time-Based awards for 2014 is as follows:

	Time-Based International RSUs		Shares of US Time-Based Awards		Weighted Average Grant Date Fair Value - US Time-Based Awards
Non-vested at January 1, 2014	16,330		180,560		$	29.26
Granted - three year vesting	6,050		18,525		32.17
Vested	(6,220	)	(50,895	)	35.99
Forfeitures	(1,085	)	(13,020	)	29.63
Non-vested at December 31, 2014	15,075		135,170		$	27.08
Expected to vest as of December 31, 2014	13,967		130,174

The following US Time-Based Awards vested and were issued in the respective years ended December 31:

	2014		2013		2012
Vested - three year vesting period	50,895		54,300		22,100
Vested -one year vesting period	—		2,177		2,767
Shares surrendered to pay withholding taxes	(18,069	)	(19,645	)	(8,538	)
Net shares issued	32,826		36,832		16,329

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Income Taxes (Tables)

12 Months Ended

Dec. 31, 2014

Income Tax Disclosure [Abstract]

Income (Loss) From Continuing Operations Before Income Tax Expense

Loss from continuing operations before income tax expense consists of the following:

	Year Ended December 31
	2014			2013			2012
United States	$	(9.0	)	$	(13.6	)	$	(12.3	)
Outside the United States	(163.8		)	(49.2		)	(36.3		)
	$	(172.8	)	$	(62.8	)	$	(48.6	)

Income Tax Expense

Income tax (benefit) expense is summarized as follows:

	Year Ended December 31
	2014			2013			2012
Current tax provision (benefit):
United States:
Federal	$	1.4		$	0.6		$	(3.1	)
State and local	0.2			—			—
Outside the United States	15.1			17.4			30.1
Total current	16.7			18.0			27.0
Deferred tax provision (benefit):
United States	(1.4		)	0.6			2.4
Outside the United States	(15.8		)	(7.9		)	(32.6		)
Total deferred	(17.2		)	(7.3		)	(30.2		)
	$	(0.5	)	$	10.7		$	(3.2	)

Company's Effective Income Tax Rates

A reconciliation of income taxes computed using the United States statutory rate to income taxes computed using our effective income tax rate is as follows:

	Year Ended December 31
	2014			2013			2012
Loss from continuing operations before income tax expense	$	(172.8	)	$	(62.8	)	$	(48.6	)
Income taxes at the United States statutory rate (35)%	(60.5		)	(21.9		)	(17.1		)
Increase (decrease) in taxes resulting from:
Effective tax rate differential on income outside of the United States	—			19.3			(3.3		)
Repatriation of foreign earnings	2.3			(1.7		)	7.4
Goodwill impairment	52.1			—			—
Valuation allowance	6.7			13.2			3.7
Uncertain tax positions	(1.1		)	0.1			(1.9		)
Allowance on GTL prepaid tax asset	—			0.4			5.6
Other, net	—			1.3			2.4
Income tax expense (benefit)	$	(0.5	)	$	10.7		$	(3.2	)
Effective income tax rate	(a)			(a)			6.5		%

(a) not meaningful

Schedule of Deferred Income Taxes

Significant components of our deferred income taxes are as follows:

	December 31
	2014			2013
Employee benefit accruals	$	58.6		$	44.7
Foreign operating loss carryforwards	6.5			8.3
Foreign tax credit carryforwards	17.3			23.1
State operating loss carryforwards	7.8			7.6
Operating accruals	48.4			42.3
Investment credit carryforwards	2.6			3.3
Valuation allowance	(91.9		)	(83.6		)
Deferred tax assets	49.3			45.7
Depreciation	(31.2		)	(37.5		)
Amortization	(88.5		)	(107.7		)
Other	(0.2		)	(1.0		)
Deferred tax liabilities	(119.9		)	(146.2		)
Net deferred tax liabilities	$	(70.6	)	$	(100.5	)

Deferred income taxes are recorded in the Consolidated Balance Sheets in the following accounts:

	December 31
	2014			2013
Other current assets	$	2.1		$	2.4
Other non-current assets	5.3			6.4
Other current liabilities	(3.2		)	(6.8		)
Deferred income taxes — non-current liabilities	(74.8		)	(102.5		)
	$	(70.6	)	$	(100.5	)

Reconciliation of Uncertain Tax Positions

A reconciliation of the beginning and ending amount of uncertain tax positions is as follows:

Balance at January 1, 2013	$	18.0
Additions for tax positions related to the current year	0.6
Reductions for tax positions of prior years	(3.4		)
Foreign currency translation	0.3
Balance at December 31, 2013	15.5
Additions for tax positions related to the current year	0.4
Addition of receivable for prior year tax position	(0.7		)
Reductions for tax positions of prior years	(0.6		)
Reductions for lapses of statute of limitations	(0.1		)
Foreign currency translation	(0.8		)
Balance at December 31, 2014	$	13.7

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Lease Obligations

12 Months Ended

Dec. 31, 2014

Leases, Operating [Abstract]

Lease Obligations

Lease Obligations

We rent office space, equipment, and land under long-term operating leases. Our operating lease expense was $8.0 million in 2014, $8.8 million in 2013 and $9.6 million in 2012.

Future minimum payments under noncancellable operating leases at December 31, 2014 are as follows for the years ending December 31:

2015	$	6.6
2016	6.0
2017	5.1
2018	3.4
2019	2.1
Thereafter	8.2
Total minimum lease payments	$	31.4

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Pension and Other Post-Retirement Benefit Plans (Future Expected Pension Benefit Payments) (Details) (USD $) In Millions, unless otherwise specified	Dec. 31, 2014
U.S. Pension Plans [Member]
Future pension benefit payments expected to be paid:
2015	$ 14.4
2016	14.1
2017	14.0
2018	13.9
2019	13.8
2020 - 2024	67.6
Non-U.S. Pension Plans [Member]
Future pension benefit payments expected to be paid:
2015	10.7
2016	12.1
2017	12.3
2018	12.0
2019	10.4
2020 - 2024	$ 51.4

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Statements of Consolidated Cash Flows (Parenthetical) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2012
Payments of Dividends	$ 0
VAC [Member]
Amount of Inventory Step-Up Amortization	$ 18.4

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Consolidated Balance Sheets (Parenthetical) (USD $) In Millions, except Share data, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013
Assets, Current [Abstract]
Allowance for doubtful accounts receivable	$ 2.5	$ 3.9
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest [Abstract]
Preferred Stock, par value (per share)	$ 0.01	$ 0.01
Preferred Stock, shares authorized (in shares)	2,000,000	2,000,000
Preferred Stock, shares issued (in shares)	0	0
Preferred Stock, shares outstanding (in shares)	0	0
Common Stock, par value (per share)	$ 0.01	$ 0.01
Common Stock, shares authorized (in shares)	90,000,000	90,000,000
Common Stock, shares issued (in shares)	32,408,222	32,304,490
Treasury Shares (in shares)	2,136,116	825,956

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Fair Value Disclosures

12 Months Ended

Dec. 31, 2014

Fair Value, Assets, Liabilities and Stockholders' Equity Measured on Recurring Basis [Abstract]

Fair Value Disclosures

Fair Value Disclosures

The following table shows the Company’s assets and liabilities accounted for at fair value on a recurring basis:

			Fair Value Measurements at Reporting Date Using
			Quoted Prices in Active Markets for Identical Assets	Significant Other Observable Inputs	Significant Unobservable Inputs
Description	December 31, 2014		(Level 1)	(Level 2)	(Level 3)
Liabilities:
Contingent consideration payable	$	1.4	—	—	1.4

The fair value of the derivative instruments have been determined based on the market equivalents at the balance sheet date, taking into account current commodity forward rates, therefore, they are classified within Level 2 of the valuation hierarchy. Our valuation techniques and Level 3 inputs used to estimate the fair value of the contingent consideration payable in connection with our acquisition of Rahu Catalytics Limited ("Rahu") are described below. There were no transfers into or out of Levels 1, 2 or 3 in 2014 or 2013.

The following table summarizes changes in Level 3 liabilities measure at fair value on a recurring basis:

	Contingent Consideration
Fair Value at December 31, 2013	$	1.4
Accretion expense	0.2
Foreign exchange	(0.2		)
Fair Value at December 31, 2014	$	1.4

We acquired Rahu on December 22, 2011. The purchase price included contingent consideration of up to an additional €20.0 million ($24.3 million at December 31, 2014) based on achieving certain volume targets over a fifteen year period ending on December 31, 2026. We estimated the fair value of the contingent consideration liability using probability-weighted expected future cash flows and applied a discount rate that appropriately captured a market participant's view of the risk associated with the liability. The liability for contingent consideration is included in Other non-current liabilities in the Consolidated Balance Sheet. The valuation of contingent consideration is classified utilizing Level 3 inputs consistent with reasonably available assumptions which would be made by other market participants. There are many factors that could impact the likelihood that we will pay the contingent consideration, and therefore, affect its value. Such factors include the overall economic conditions and our ability to drive sales volumes as planned. Subsequent to the date of acquisition the estimated fair value of the contingent consideration was reduced to €1.0 million ($1.4 million)after an evaluation of new information available in the fourth quarter of 2013. The change was reflected within Other income in the 2013 Consolidated Statement of Operations. A change in a market participant view of risks could also impact the value of the contingent consideration.

We also hold financial instruments consisting of cash, accounts receivable, and accounts payable. The carrying amounts of cash, accounts receivable and accounts payable approximate fair value due to the short-term maturities of these instruments. Revolver debt had a carrying value of $12.5 million at December 31, 2014 and is the approximate fair value due to the the short-term nature of the instrument. There was no long-term debt outstanding as of December 31, 2014 or 2013. Derivative instruments are recorded at fair value as indicated above.

We utilize a “relief from royalty” methodology in estimating fair values for indefinite-lived tradenames. The methodology estimates the fair value of each trade name by determining the present value of the royalty payments that are avoided as a result of owning the tradename and includes judgmental assumptions about sales growth that are consistent with the assumptions used to determine the fair value of reporting units in our goodwill testing. The fair value measurements were calculated using unobservable inputs, classified as Level 3, requiring significant management judgment due to the absence of quoted market prices or observable inputs for assets of a similar nature.

Accounts receivable potentially subjects us to a concentration of credit risk. We maintain significant accounts receivable balances with several large customers. At December 31, 2014 and 2013 the accounts receivable balance from our largest customer represented 2% of the Company’s net accounts receivable, respectively. Generally, we do not obtain security from our customers in support of accounts receivable.

Sales to the top three customers in the Battery Technologies segment represented approximately 49%, 48% and 52% of Battery Technologies’ net sales in 2014, 2013 and 2012, respectively. The loss of one or more of these customers could have a material adverse effect on Battery Technologies’ business, results of operations or financial position.

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Document And Entity Information (USD $) In Millions, except Share data, unless otherwise specified	12 Months Ended
	Dec. 31, 2014	Feb. 27, 2015	Jun. 30, 2014
Document And Entity Information [Abstract]
Entity Registrant Name	OM GROUP INC
Entity Central Index Key	0000899723
Current Fiscal Year End Date	--12-31
Entity Filer Category	Large Accelerated Filer
Document Type	10-K
Document Period End Date	Dec. 31, 2014
Document Fiscal Year Focus	2014
Document Fiscal Period Focus	FY
Amendment Flag	false
Entity Common Stock, Shares Outstanding		30,240,512
Entity Well-known Seasoned Issuer	Yes
Entity Voluntary Filers	No
Entity Current Reporting Status	Yes
Entity Public Float			$ 1,010.6

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Income Taxes

12 Months Ended

Dec. 31, 2014

Income Tax Disclosure [Abstract]

Income Taxes

Income Taxes

Loss from continuing operations before income tax expense consists of the following:

	Year Ended December 31
	2014			2013			2012
United States	$	(9.0	)	$	(13.6	)	$	(12.3	)
Outside the United States	(163.8		)	(49.2		)	(36.3		)
	$	(172.8	)	$	(62.8	)	$	(48.6	)

Income tax (benefit) expense is summarized as follows:

	Year Ended December 31
	2014			2013			2012
Current tax provision (benefit):
United States:
Federal	$	1.4		$	0.6		$	(3.1	)
State and local	0.2			—			—
Outside the United States	15.1			17.4			30.1
Total current	16.7			18.0			27.0
Deferred tax provision (benefit):
United States	(1.4		)	0.6			2.4
Outside the United States	(15.8		)	(7.9		)	(32.6		)
Total deferred	(17.2		)	(7.3		)	(30.2		)
	$	(0.5	)	$	10.7		$	(3.2	)

A reconciliation of income taxes computed using the United States statutory rate to income taxes computed using our effective income tax rate is as follows:

	Year Ended December 31
	2014			2013			2012
Loss from continuing operations before income tax expense	$	(172.8	)	$	(62.8	)	$	(48.6	)
Income taxes at the United States statutory rate (35)%	(60.5		)	(21.9		)	(17.1		)
Increase (decrease) in taxes resulting from:
Effective tax rate differential on income outside of the United States	—			19.3			(3.3		)
Repatriation of foreign earnings	2.3			(1.7		)	7.4
Goodwill impairment	52.1			—			—
Valuation allowance	6.7			13.2			3.7
Uncertain tax positions	(1.1		)	0.1			(1.9		)
Allowance on GTL prepaid tax asset	—			0.4			5.6
Other, net	—			1.3			2.4
Income tax expense (benefit)	$	(0.5	)	$	10.7		$	(3.2	)
Effective income tax rate	(a)			(a)			6.5		%

(a) not meaningful

The effective income tax rate for the year ended December 31, 2014 is impacted by the VAC intangible asset impairment charges of $195.4 million and other cost reduction charges (see Note 6 for further discussion on the intangible asset impairment charges). There is no tax benefit for the $168.7 million goodwill portion of the impairment charges due to its permanent nature.

Excluding the impact of the VAC goodwill and intangible asset impairment charges of $195.4 million and other business improvement and cost reduction charges of $10.0 million, the effective tax rate for the year ended December 31, 2014 would have been 27.4%. This rate is lower than the U.S. statutory tax rate primarily due to income earned in tax jurisdictions with lower statutory rates than the U.S., and our financing structure, partially offset by losses and carry-forwards in certain jurisdictions (including the U.S. and Germany) with no corresponding tax benefit.

The effective income tax rate for the year ended December 31, 2013 is impacted by the loss of $111.6 million related to the divestiture of the Advanced Materials business. There was no tax benefit on the loss on divestiture of the Advanced Materials business due to our legal entity and tax structure.

Excluding the impact of loss on sale of advanced materials business of $111.6 million, the effective tax rate for the year ended December 31, 2013 would have been 22.1%. This rate is lower than the U.S. statutory tax rate primarily due to income earned in tax jurisdictions with lower statutory rates than the U.S., and our financing structure, partially offset by losses and carry-forwards in certain jurisdictions (including the U.S. and Germany) with no corresponding tax benefit.

The effective income tax rate for the year ended December 31, 2012 was impacted by VAC purchase accounting related inventory charges of $55.9 million and GTL. During 2012, we recorded a tax expense of $10.4 million related to GTL. This includes a $5.6 million tax expense related to GTL prepaid tax asset impairment and $6.6 million related to other GTL permanent differences, of which our share was 55%, or $6.7 million.

Excluding the impact of VAC purchase accounting related inventory charges and GTL discrete and permanent items, the effective tax rate for the year ended December 31, 2012 would have been 31.8%. This rate is lower than the U.S. statutory tax rate primarily due to income earned in tax jurisdictions with lower statutory rates than the U.S., and our internal financing structure, partially offset by losses and carry-forwards in certain jurisdictions (including the U.S. and Germany) with no corresponding tax benefit.

During fourth quarter of 2012, the Company received a $37.9 million income tax refund which was included in the Refundable, prepaid and accrued income taxes in the Statement of Consolidated Cash Flows for December 31, 2012.

We intend to repatriate only future earnings and therefore have not provided additional United States income taxes on approximately $402 million of undistributed earnings of consolidated foreign subsidiaries. Such earnings could become taxable upon the sale or liquidation of these foreign subsidiaries or upon dividend repatriation. Our intent is for such earnings to be permanently reinvested by the foreign subsidiaries. It is not practicable to estimate the amount of unrecognized withholding taxes and tax liability on such earnings.

We file income tax returns in the U.S. federal jurisdiction, and various state and foreign jurisdictions. Our major tax jurisdictions include the U.S. and Germany. With few exceptions, we are no longer subject to U.S. federal, state and local, or non-U.S. income tax examinations by tax authorities for years before 2006. The Internal Revenue Service completed the examination of our 2010 U.S. federal income tax return, and Finnish tax authorities completed the examination of our Finnish tax returns for the years 2007-2011.  VAC's German tax returns have been audited through 2005. We are indemnified, subject to certain limitations, for any pre-acquisition income tax liabilities of VAC. German tax authorities are currently examining VAC's income tax returns for the years 2006-2011.

Income tax payments were $18.8 million, $47.2 million and $33.9 million in 2014, 2013 and 2012, respectively.

Significant components of our deferred income taxes are as follows:

	December 31
	2014			2013
Employee benefit accruals	$	58.6		$	44.7
Foreign operating loss carryforwards	6.5			8.3
Foreign tax credit carryforwards	17.3			23.1
State operating loss carryforwards	7.8			7.6
Operating accruals	48.4			42.3
Investment credit carryforwards	2.6			3.3
Valuation allowance	(91.9		)	(83.6		)
Deferred tax assets	49.3			45.7
Depreciation	(31.2		)	(37.5		)
Amortization	(88.5		)	(107.7		)
Other	(0.2		)	(1.0		)
Deferred tax liabilities	(119.9		)	(146.2		)
Net deferred tax liabilities	$	(70.6	)	$	(100.5	)

Deferred income taxes are recorded in the Consolidated Balance Sheets in the following accounts:

	December 31
	2014			2013
Other current assets	$	2.1		$	2.4
Other non-current assets	5.3			6.4
Other current liabilities	(3.2		)	(6.8		)
Deferred income taxes — non-current liabilities	(74.8		)	(102.5		)
	$	(70.6	)	$	(100.5	)

We have a U.S. net deferred tax asset of $1.4 million which is expected to be recovered based on temporary differences that will reverse in 2015-2016. At December 31, 2014 and 2013, we had U.S state net operating loss carryforwards representing a potential future tax benefit of $7.8 million and $7.7 million, respectively. These carryforwards expire at various dates from 2015 through 2034. We have recorded a full valuation allowance against the U.S state net operating loss carryforwards. We have foreign net operating loss carryforwards of $30.6 million, representing a potential future tax benefit of $6.5 million in various jurisdictions, some of which expire in 2018 through 2033, and some of which have no expiration. We have established a $1.8 million valuation allowance against the foreign net operating loss carryforwards as we believe that some of these assets will more likely than not be realized. We have foreign investment tax credit and allowance carryforwards of $2.6 million, of which $1.9 million expire in 2028, while the remaining $0.7 million have no expiration. We have recorded a $1.9 million valuation allowance against the foreign investment tax credit and allowance carryforwards as we believe that a portion of these assets will not be realized.

For the year ended December 31, 2014, our valuation allowance increased primarily due to the increase in foreign carryforwards.

A reconciliation of the beginning and ending amount of uncertain tax positions is as follows:

Balance at January 1, 2013	$	18.0
Additions for tax positions related to the current year	0.6
Reductions for tax positions of prior years	(3.4		)
Foreign currency translation	0.3
Balance at December 31, 2013	15.5
Additions for tax positions related to the current year	0.4
Addition of receivable for prior year tax position	(0.7		)
Reductions for tax positions of prior years	(0.6		)
Reductions for lapses of statute of limitations	(0.1		)
Foreign currency translation	(0.8		)
Balance at December 31, 2014	$	13.7

With the exception of those relating to the VAC acquisition, all uncertain tax positions would affect the effective tax rate if recognized. However, $6.1 million of the uncertain tax positions could be offset by tax credit carryforwards, which, if recognized, would be offset by an adjustment to the deferred tax assets. The decrease in uncertain tax positions in 2014 primarily results from effective settlements during 2014 in various tax jurisdictions. The decrease in uncertain tax positions in 2013 primarily results from the effective settlements during 2013 in various tax jurisdictions and the transfer of our equity interests in GTL as part of the divestiture of the Advanced Materials business. At December 31, 2014, the liability for uncertain tax positions includes $5.9 million for which it is reasonably possible that the uncertain tax position will decrease within the next twelve months. These uncertain tax positions primarily relate to acquired businesses and may decrease upon effective settlement.

We recognize interest accrued related to uncertain tax positions and penalties as a component of income tax expense. During 2014 and 2013 we recognized an immaterial benefit related to interest and penalties. At December 31, 2014 and 2013, we had $0.6 million and $0.8 million, respectively, accrued for interest and penalties.

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Share-Based Compensation (Number of Shares And Weighted-Average Grant-Date Fair Value) (Details) (USD $)	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Weighted-Average Fair Value at Grant Date (in dollars per share) [Roll Forward]
Granted	$ 15.03	$ 13.49	$ 15.29
Stock Options [Member]
Shares [Roll Forward]
Non-vested at beginning balance	436,027	442,626
Granted	230,300	273,200	238,319
Vested	(218,532)	(214,816)
Forfeited	(26,581)	(64,983)
Non-vested at ending balance	421,214	436,027	442,626
Weighted-Average Fair Value at Grant Date (in dollars per share) [Roll Forward]
Non-vested beginning balance	$ 14.78	$ 17.20
Granted	$ 15.03	$ 13.49
Vested	$ 15.18	$ 17.37
Forfeited	$ 14.74	$ 16.02
Non-vested ending balance	$ 14.36	$ 14.78	$ 17.20

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Statements of Consolidated Operations (USD $) In Millions, except Per Share data, unless otherwise specified	12 Months Ended
	Dec. 31, 2014		Dec. 31, 2013		Dec. 31, 2012
Income Statement [Abstract]
Net sales	$ 1,067.5	[1],[2]	$ 1,157.5	[1],[2]	$ 1,544.4	[1],[2]
Cost of goods sold	829.3		899.1		1,300.8
Gross profit	238.2		258.4		243.6
Selling, general and administrative expenses	207.9		217.3		251.2
Goodwill and intangible asset impairment	195.4		0		0
Gain on sale of property	0		0		(2.9)
Operating profit (loss)	(165.1)		41.1		(4.7)
Other income (expense):
Interest expense	(2.6)		(12.3)		(49.7)
Foreign exchange gain (loss)	(6.5)		8.0		(0.8)
Gain (loss) on divestiture of Advance Materials business	1.7		(111.6)		0
Other, net	(0.3)		12.0		6.6
Non operating income (expense), total	(7.7)		(103.9)		(43.9)
Loss from continuing operations before income tax expense	(172.8)		(62.8)		(48.6)
Income tax expense (benefit)	(0.5)		10.7		(3.2)
Loss from continuing operations, net of tax	(172.3)		(73.5)		(45.4)
Loss from discontinued operations, net of tax	(0.3)		(12.3)		(0.4)
Consolidated net loss	(172.6)		(85.8)		(45.8)
Net loss attributable to noncontrolling interests	0		1.8		7.1
Loss attributable to OM Group, Inc. common stockholders	(172.6)		(84.0)		(38.7)
Earnings per common share — basic:
Loss from continuing operations attributable to OM Group, Inc. common stockholders (in dollars per share)	$ (5.54)		$ (2.27)		$ (1.21)
Loss from discontinued operations attributable to OM Group, Inc. common stockholders (in dollars per share)	$ (0.01)		$ (0.39)		$ (0.01)
Net loss attributable to OM Group, Inc. common stockholders (in dollars per share)	$ (5.55)		$ (2.66)		$ (1.22)
Earnings per common share — assuming dilution:
Loss from continuing operations attributable to OM Group, Inc. common stockholders (in dollars per share)	$ (5.54)		$ (2.27)		$ (1.21)
Loss from discontinued operations attributable to OM Group, Inc. common stockholders (in dollars per share)	$ (0.01)		$ (0.39)		$ (0.01)
Loss attributable to OM Group, Inc. common stockholders (in dollars per share)	$ (5.55)		$ (2.66)		$ (1.22)
Weighted average shares outstanding
Basic (in shares)	31.1		31.6		31.9
Assuming dilution (in shares)	31.1		31.6		31.9
Dividends declared per common share (in dollars per share)	$ 0.30		$ 0		$ 0
Amounts attributable to OM Group, Inc. common stockholders:
Loss from continuing operations, net of tax	(172.3)		(71.7)		(38.3)
Loss from discontinued operations, net of tax	(0.3)		(12.3)		(0.4)
Loss attributable to OM Group, Inc. common stockholders	$ (172.6)		$ (84.0)		$ (38.7)

[1] Net sales attributed to the geographic area are based on the location of the manufacturing facility, except for Japan, which was a sales office and included in the divestiture of the Advance Materials business.

[2] All results and balances related to the UPC business are excluded for all periods presented.

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Property, Plant and Equipment, net

12 Months Ended

Dec. 31, 2014

Property, Plant and Equipment, Net [Abstract]

Property, Plant and Equipment, net

Property, Plant and Equipment, net

Property, plant and equipment, net consists of the following as of December 31,

	2014			2013
Land and improvements	$	37.6		$	39.6
Buildings and improvements	138.0			145.8
Machinery and equipment	346.4			350.4
Furniture and fixtures	8.2			7.6
Property, plant and equipment, at cost	530.2			543.4
Less accumulated depreciation	(221.9		)	(197.8		)
	$	308.3		$	345.6

Total depreciation expense on property, plant and equipment was $42.5 million in 2014, $47.7 million in 2013 and $58.7 million in 2012.

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Inventories

12 Months Ended

Dec. 31, 2014

Inventory, Net [Abstract]

Inventories

Inventories

Inventories consist of the following as of December 31,

	2014		2013
Raw materials and supplies	$	73.6	$	83.3
Work-in-process	118.1		122.2
Finished goods	36.7		35.4
	$	228.4	$	240.9

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Commitments and Contingencies

12 Months Ended

Dec. 31, 2014

Commitments and Contingencies Disclosure [Abstract]

Commitments and Contingencies

Commitments and Contingencies

We have potential contingent liabilities with respect to environmental matters related to our former operations in Brazil which were sold in 2003. Environmental cost-sharing arrangements are in place between the original owner and operator of these operations and between the Company and the subsequent purchaser of these operations. We have reviewed the limited information made available to us on the environmental conditions and are awaiting more detailed information from the purchaser. We cannot currently evaluate whether or not, or to what extent, we will be responsible for any remediation costs until more detailed information is received and validated.

From time to time, we are subject to various legal and regulatory proceedings, claims and assessments that arise in the normal course of business. The ultimate resolution of such proceedings, claims and assessments is inherently unpredictable and, as a result, our estimates of liability, if any, are subject to change and actual results may materially differ from such estimates. Our estimate of any costs to be incurred as a result of these proceedings, claims and assessments are accrued when the liability is considered probable and the amount can be reasonably estimated. We believe the amount of any current potential liability with respect to legal and regulatory proceedings, claims and assessments will not have a material adverse effect upon our financial condition, results of operations, or cash flows.

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Pension and Other Post-Retirement Benefit Plans

12 Months Ended

Dec. 31, 2014

Pension and Other Postretirement Benefit Expense [Abstract]

Pension and Other Post-Retirement Benefit Plans

Pension and Other Post-Retirement Benefit Plans

We have defined contribution plans covering substantially all eligible U.S. employees. Contributions are directed by the employee into various investment options. These defined contribution plans do not have any direct ownership of the Company’s common stock. Under these plans, we match participants’ contributions based on plan provisions. Certain plans provide for a discretionary Company contribution based on employee compensation. We maintain additional defined contribution plans in certain locations outside the United States. Aggregate defined contribution plan expenses were $3.3 million, $4.7 million and $4.9 million in 2014, 2013 and 2012, respectively.

We have defined benefit pension obligations at VAC, substantially all of which are unfunded. VAC sponsors various defined benefits plans for its employees, including pension, early retirement benefits and anniversary benefits, mainly in Germany.

The EaglePicher Technologies ("EPT") pension plans consist of four, non-contributory, defined benefit pension plans. The Technologies Salaried Plan is a defined benefit, cash balance plan that covers EaglePicher Technologies salaried employees hired prior to January 1, 2007. The Technologies Hourly Plan is a defined benefit plan that covers EaglePicher Technologies non-union hourly employees hired prior to January 1, 2007 and union hourly employees hired prior to May 3, 2008. We also hold the liabilities of two frozen defined benefit pension plans. Pension benefits are paid to plan participants directly from pension plan assets. In 2014 we offered lump-sum payments to terminated vested participants in the EPT pension plans. $29.6 million was paid out of plan assets to participants who elected the lump sum payment, and we recorded a $3.2 million pre-tax pension settlement expense.

In addition to the pension liabilities for VAC and EPT, we have a non-contributory, defined benefit pension plan for certain retired employees in the United States related to a divested business. Pension benefits under this plan are paid to plan participants directly from pension plan assets.

Certain other non-U.S. employees are covered under other defined benefit plans. These other non-U.S. plans are not material.

We also have an obligation to our former chief executive officer in settlement of an unfunded supplemental executive retirement plan (“SERP”). Payments under the SERP are made directly from the Company.

The following table sets forth the changes in the benefit obligation and the plan assets during the year and reconciles the funded status of the defined benefit plans with the amounts recognized in the Consolidated Balance Sheet at December 31:

	Pension Benefits
	U.S. Plans						Non-U.S. Plans
	2014			2013			2014			2013
Change in benefit obligation
Projected benefit obligation at beginning of year	$	(220.5	)	$	(245.0	)	$	(191.1	)	$	(181.4	)
Service cost	(1.0		)	(1.2		)	(6.8		)	(5.1		)
Interest cost	(9.2		)	(8.4		)	(6.1		)	(6.1		)
Actuarial (loss) gain	(29.4		)	20.2			(25.8		)	(0.4		)
Benefits paid	14.4			13.9			10.3			10.2
Settlement	29.6			—			—			—
Foreign currency exchange rate changes	—			—			25.3			(8.3		)
Projected benefit obligation at end of year	(216.1		)	(220.5		)	(194.2		)	(191.1		)
Change in plan assets
Fair value of plan assets at beginning of year	177.4			180.5			4.2			4.0
Actual return on plan assets	17.2			5.7			—			—
Employer contributions	1.5			5.1			11.9			10.1
Settlement	(29.6		)	—			—			—
Foreign currency exchange rate changes	—			—			(0.7		)	0.3
Benefits paid	(14.4		)	(13.9		)	(10.3		)	(10.2		)
Fair value of plan assets at end of year	152.1			177.4			5.1			4.2
Funded status — plan assets less than benefit obligations	(64.0		)	(43.1		)	(189.1		)	(186.9		)
Recognized in accumulated other comprehensive income:
Net actuarial loss (gain)	18.4			(16.9		)	18.4			(0.1		)
Amounts not yet recognized as a component of net postretirement benefit cost	$	36.3		$	17.9		$	49.6		$	31.2
Amounts recorded in the balance sheet:
Accrued benefit liability — current	$	(0.6	)	$	(0.7	)	$	(8.1	)	$	(8.8	)
Accrued benefit liability — long-term	(63.4		)	(42.4		)	(181.0		)	(178.1		)
Accumulated other comprehensive loss	36.3			17.9			49.6			31.2
Net amount recognized	$	(27.7	)	$	(25.2	)	$	(139.5	)	$	(155.7	)

The accumulated benefit obligation of the U.S. plans was $215.6 million and $220.1 million as of December 31, 2014 and 2013, respectively. The accumulated benefit obligation of the non-U.S. plans was $182.7 million and $189.8 million as of December 31, 2014 and 2013, respectively.

Set forth below is a detail of the net periodic pension and other post-retirement benefit expense for the defined benefit plans for the years ended December 31:

	Pension Benefits
	U.S. Plans
	2014			2013			2012
Service cost	$	1.0		$	1.2		$	1.1
Interest cost	9.2			8.4			9.3
Amortization of unrecognized net loss	1.4			0.3			1.5
Expected return on plan assets	(10.7		)	(9.4		)	(10.4		)
Settlement charge	3.2			—			—
Net periodic benefit cost	4.1			0.5			1.5
Net loss (gain) arising during the year	22.1			(16.1		)	1.3
Net gain recognized during the year	(3.6		)	(0.8		)	(3.4		)
Total recognized in other comprehensive loss	18.5			(16.9		)	(2.1		)
Total recognized in net periodic benefit cost and other comprehensive loss	$	22.6		$	(16.4	)	$	(0.6	)

Set forth below is a detail of the net periodic pension and other post-retirement benefit expense for the defined benefit plans for the years ended December 31:

	Pension Benefits
	Non-U.S. Plans
	2014			2013			2012
Service cost	$	6.8		$	5.1		$	4.0
Interest cost	6.1			6.1			7.6
Amortization of unrecognized net loss	1.6			1.8			0.8
Net periodic benefit cost	14.5			13.0			12.4
Net loss arising during the year	25.8			0.3			29.8
Net gain recognized during the year	(1.6		)	(1.8		)	(0.8		)
Exchange rate gain (loss) gain	(5.8		)	1.4			0.8
Total recognized in other comprehensive loss	18.4			(0.1		)	29.8
Total recognized in net periodic benefit cost and other comprehensive loss	$	32.9		$	12.9		$	42.2

Future pension benefit payments expected to be paid are as follows:

	Pension
Expected benefit payments	U.S. Plans		Non-U.S. Plans
2015	$	14.4	$	10.7
2016	$	14.1	$	12.1
2017	$	14.0	$	12.3
2018	$	13.9	$	12.0
2019	$	13.8	$	10.4
2020-2024	$	67.6	$	51.4

Pension benefit payments for the U.S. pension plans are made from assets of the pension plans. We expect to contribute $0.7 million to our U.S. pension plans in 2015. Expected contributions are dependent on many variables, including the variability of the market value of the assets as compared to the obligation and other market or regulatory conditions. Accordingly, actual funding may differ significantly from current estimates. We expect to make annual benefit payments of approximately $10.7 million related to our non-U.S. pension plans in 2015.

The amounts in Accumulated other comprehensive income (loss) that are expected to be recognized as components of net periodic benefit cost during 2015 are as follows:

	U.S. Plans		Non-U.S. Plans		Total
Net actuarial loss	$	0.9	$	2.6	$	3.5

The following weighted-average assumptions were used to determine the Company’s pension benefit obligations for the year ended December 31:

	2014	2013
U.S. Plans
Discount rate — EPT Active Plans	3.7%	4.6%
Discount rate — EPT Inactive Plans	3.5%	4.4%
Discount rate — Divested Business Plans	3.5%	4.3%
Expected return on pension plan assets — EPT Active Plans	6.3%	6.5%
Expected return on pension plan assets — EPT Inactive Plans	6.3%	6.5%
Expected return on pension plan assets — Divested Business Plans	6.3%	6.5%
Rate of increases in compensation — EPT Active Plans	3.5%	3.5%
Non U.S. Plans
Discount rate	2.0%	3.5%
Rate of increases in compensation	2.5% – 3.0%	2.5% – 3.0%

The following weighted-average assumptions were used to determine the Company’s net periodic pension benefit costs for the year ended December 31:

	2014	2013
U.S. Plans
Discount rate — EPT Active Plans	4.6%	3.7%
Discount rate — EPT Inactive Plans	4.4%	3.5%
Discount rate — Divested Business Plans	4.3%	3.4%
Expected return on pension plan assets — EPT Active Plans	6.5%	7.0%
Expected return on pension plan assets — EPT Inactive Plans	6.5%	4.7%
Expected return on pension plan assets — Divested Business Plans	6.5%	6.0%
Non U.S. Plans
Discount rate	3.5%	3.5%
Expected return on pension plan assets	3.5%	3.7%

Our investment objective for defined benefit plan assets is to meet the plan’s benefit obligations, without undue exposure to risk. The investment strategy focuses on asset class diversification, liquidity to meet benefit payments and an appropriate balance of long-term investment return and risk. The Investment Committee oversees the investment allocation process, which includes the selection and evaluation of the investment manager, the determination of investment objectives and risk guidelines, and the monitoring of actual investment performance. In determining the expected long-term rate of return on defined benefit pension plan assets, management considers the historical rates of return over a period of time that is consistent with the long-term nature of the underlying obligations of these plans, the nature of investments and an expectation of future investment strategies.

We utilize the services of independent third-party investment managers to oversee the management of U.S. pension plan assets. The investment managers are allowed to exercise investment discretion, subject to limitations established by the Company.

Below are our actual and established target allocations for the EPT pension plans, representing 93% of U.S. pension plan assets:

	Actual Allocation		Target Allocation
U.S. equity securities	11	%	11	%
Non-U.S. equity securities	11	%	11	%
Fixed income	62	%	62	%
High yield	5	%	5	%
TIPS	5	%	5	%
Global REITS	5	%	5	%
Cash	1	%	1	%
Total assets	100	%	100	%

Active plan investments include U.S. equity securities which are invested broadly in U.S. companies in various industries using the Wilshire 5000 Index as the asset class benchmark. Non-U.S. equity securities are invested broadly in non-U.S. companies in various industries using the MSCI ACWI ex-U.S. Index as the asset class benchmark. Long duration fixed income consists primarily of investment grade corporate fixed income bonds benchmarked against the Barclays Capital Long Credit Index. Intermediate government fixed income consists of U.S. government bonds using the Barclays Capital Intermediate Government Index as the asset class benchmark. U.S. Treasury Inflation Protected Fixed Income (“TIPS”) invests in the U.S. Treasury inflation protected securities market using the Barclays U.S. TIPS Index as the asset class benchmark. Global REITS investments are invested in the broad global real estate securities market with the FTSE EPRA/NAREIT Developed RE Index (or other comparable index) as the asset class benchmark. High Yield Fixed Income (“High yield”) invests in broad U.S. non-investment grade fixed income bonds using the Merrill Lynch U.S. High Yield Master II as the asset class benchmark.

Our asset allocations by asset category for the Divested business and non-U.S. plans are as follows:

	December 31,
	2014		2013
U.S. equity securities	33	%	38	%
Corporate bonds	8	%	10	%
Government bonds	11	%	10	%
Other fixed income	15	%	13	%
Non-U.S. assets	31	%	27	%
Cash	2	%	2	%
Total assets	100	%	100	%

Equity securities are invested broadly in U.S. companies in various industries. Non-U.S. assets consist of equity securities of non-U.S. companies in various industries as well as foreign mutual funds.

The fair value measurements of defined benefit pension plan assets by category at December 31, 2014 are as follows:

	December 31,		Quoted Prices in Active Markets for Identical		Significant Other Observable		Significant Unobservable
Category	2014		Assets (Level 1)		Inputs (Level 2)		Inputs (Level 3)
Equity securities — US	$	21.2	$	3.9	$	17.3	$	—
Equity securities — Non US	15.4		—		15.4		—
Fixed income:
Bonds	88.6		—		88.6		—
Other fixed income	4.3		—		4.3		—
High yield	7.2		—		7.2		—
TIPS	6.7		—		6.7		—
Global REITS	7.0		—		7.0		—
Non-U.S. assets	5.1		—		5.1		—
Cash and cash equivalents	1.7		1.7		—		—
Total	$	157.2	$	5.6	$	151.6	$	—

Equity securities and fixed income, high-yield, TIPS and Global REITS investments are primarily comprised of mutual funds and common/collective trust funds. Investments in mutual funds and common/collective trust funds are valued at the net asset value per share or unit multiplied by the number of shares or units held as of the measurement date.

The defined benefit pension plans do not have any direct ownership of the Company’s common stock.

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Lease Obligations (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Leases, Operating [Abstract]
Operating lease expense	$ 8.0	$ 8.8	$ 9.6
Future minimum payments under noncancellable operating leases:
2015	6.6
2016	6.0
2017	5.1
2018	3.4
2019	2.1
Thereafter	8.2
Total minimum lease payments	$ 31.4

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Debt

12 Months Ended

Dec. 31, 2014

Debt Instruments [Abstract]

Debt

Debt

On September 4, 2013 we entered into a new five-year Senior Secured Revolving Credit Facility (“the Facility”), and terminated our previous credit facility dated August 2, 2011 that was scheduled to expire in August 2016. The Facility provides for $350 million of revolving borrowing capacity and includes an expansion option of up to an additional $150 million, subject to certain conditions. The borrowers under the agreement are the Company, Harko C.V. (“Harko”), a limited partnership organized under the laws of the Netherlands, and VAC Germany GmbH (“VAC”), a limited liability company under the laws of Germany. Harko and VAC are wholly-owned subsidiaries of the Company. The Facility matures on September 4, 2018.

In the first six months of 2013 we repaid the Term A and Term B loans under the previous credit facility with the proceeds from the divestitures of the Advanced Materials and UPC businesses, as required, and cash on hand. Related to these required pre-payments, we included the write-off of $10.3 million and $1.5 million of deferred financing fees in the losses on divestitures of the Advanced Materials and UPC businesses, respectively.

The obligations of the Company under the Facility are guaranteed by certain of the Company’s material U.S. subsidiaries. The obligations of Harko and VAC under the Facility are guaranteed by the Company and certain of the Company’s material subsidiaries, subject to certain exceptions including financial assistance limitations in certain foreign jurisdictions. In addition, the obligations of the Company under the Facility are secured by a first priority security interest in substantially all of the existing and future personal property of the Company and certain of the Company’s material U.S. subsidiaries, including 65% of the voting capital stock of certain of the Company’s direct foreign subsidiaries. The obligations of Harko and VAC under the Facility are secured by a first priority security interest in certain of the existing and future personal property of Harko, VAC and certain of the Company’s subsidiaries and a 100% pledge of the voting capital stock of certain of the Company’s subsidiaries, subject to certain exceptions, including financial assistance limitations in certain foreign jurisdictions.

The interest rates applicable to loans under the Facility will be at our option and equal to either a base rate or a LIBOR rate, in each case plus an applicable margin percentage. The base rate will be the highest of (i) the federal funds rate plus 0.50%, (ii) the prime rate or (iii) the LIBOR rate with a maturity of one month plus 1.00%. The applicable margin percentage is based on the leverage ratio of the Company. The range of the applicable margin percentage is 1.125% to 2.000% in the case of LIBOR advances and 0.125% to 1.000% in the case of base rate advances.

The Facility contains customary representations and warranties and certain covenants that limit the ability of the Company and its restricted subsidiaries to, among other things: (i) incur or guarantee additional indebtedness; (ii) redeem, repurchase or pay distributions on capital stock or redeem or repurchase subordinated debt; (iii) make investments; (iv) sell assets; (v) enter into agreements that restrict distributions or other payments from restricted subsidiaries to the Company; (vi) incur or suffer to exist liens securing indebtedness; (vii) consolidate, merge or transfer all or substantially all of their assets; and (viii) engage in transactions with affiliates. In addition, the Facility contains financial covenants that limit capital expenditures in any fiscal year and that measure (i) the ratio of the Company’s total funded indebtedness net of certain cash to the amount of the Company’s consolidated EBITDA and (ii) the ratio of the amount of the Company’s consolidated EBITDA to the Company’s cash interest expense, as defined in the agreement.

As of December 31, 2014, we had $12.5 million outstanding under the Facility which was repaid with available cash in January 2015. We are in compliance with all Facility covenants.

Interest paid on long-term debt was $0.0 million, $6.9 million and $38.4 million in 2014, 2013 and 2012, respectively. As required, interest expense of $1.0 million and $2.5 million has been allocated to discontinued operations for 2013 and 2012, respectively. No interest was capitalized in 2014, 2013 or 2012.

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Income Taxes (Effective Income Tax Rates) (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Income Tax Disclosure [Abstract]
Loss from continuing operations before income tax expense	$ (172.8)	$ (62.8)	$ (48.6)
Income taxes at the United States statutory rate (35)%	(60.5)	(21.9)	(17.1)
Increase (decrease) in taxes resulting from:
Effective tax rate differential on income outside of the United States	0	19.3	(3.3)
Repatriation of foreign earnings	2.3	(1.7)	7.4
Goodwill impairment	52.1	0	0
Valuation allowance	6.7	13.2	3.7
Uncertain tax positions	(1.1)	0.1	(1.9)
Allowance on GTL prepaid tax asset	0	0.4	5.6
Other, net	0	1.3	2.4
Income tax expense (benefit)	$ (0.5)	$ 10.7	$ (3.2)
Effective income tax rate	27.40%		6.50%
Effective income tax rate at Federal Statutory Income Tax Rate	35.00%	35.00%	35.00%

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Acquisitions and Divestitures

12 Months Ended

Dec. 31, 2014

Business Combinations [Abstract]

Acquisitions and Divestitures

Acquisitions and Divestitures

(a) Acquisitions

Yardney

On November 24, 2014. we completed the acquisition of Ener-Tek International, Inc., which operates under the brand name Yardney Technical Products ("Yardney"). Based in East Greenwich, Rhode Island, Yardney is a designer, developer and manufacturer of high-performance lithium-ion and silver-zinc cells and batteries for niche applications in the defense and aerospace markets. We funded the $24.6 million acquisition price through existing cash balances. The balance sheet as the acquisition date is based on preliminary estimated purchase accounting. The purchase price was allocated to $10.1 million of net assets, including $5.5 million of identifiable intangibles. The remaining $14.5 million was recorded as goodwill, which is not expected to be deductible for tax purposes.

VAC

Our Magnetic Technologies segment consists of VAC Holding GmbH ("VAC"), which we acquired in 2011. The total purchase price of $812.2 million included cash consideration of $686.2 million, withheld consideration of $86.3 million, and the issuance of Company shares valued at $39.7 million. The withheld consideration relates to potential indemnification claims made by OM Group and accepted by the seller, if any, within two years of the closing date of the acquisition with certain exceptions related to tax matters. In August 2013 we remitted a payment of $23.0 million to the seller of VAC. In December 2014, we remitted a payment of $16.2 million to the seller of VAC and charged certain tax assessments related to pre-acquisition tax years of $1.6 million against the outstanding withholding liability.

We now expect matters relating to the withheld consideration to be resolved in 2015. Due to the length of time over which these payments are being made, these payments are classified as financing activities within the Statement of Consolidated Cash Flows. The 2013 payment was previously classified in investing activities, and we have now correctly classified this payment in financing activities.

We are engaged in arbitration with the seller regarding the remainder of the withheld consideration which covers unresolved claims.

(b) Divestitures

Advanced Materials

On March 29, 2013, we completed the divestiture of our cobalt-based business. The transaction comprised the sale of the downstream portion of the business (including our cobalt refinery assets in Kokkola, Finland), and the transfer of equity interests in the DRC-based joint venture, known as GTL, to the joint venture partners, subject to a security interest in our favor with respect to the joint venture's performance related to certain supply arrangements.

In connection with this transaction we received cash proceeds of $328.7 million. At closing, net proceeds of $302.1 million were received, and we received additional proceeds of $26.6 million as an adjustment to the purchase price based on a post-closing analysis of the closing balance sheet in July 2013. Including the adjustment to the purchase price, a loss of $111.6 million was recorded on the divestiture in 2013, which included a $10.3 million write-off of deferred financing fees related to the required debt pre-payment, a reserve for a note receivable from joint venture partner of $16.0 million and transaction expenses of $9.0 million.

The sale agreement for the downstream portion of the business also provides for potential future additional cash consideration of up to $110.0 million based on the business achieving certain revenue targets over a period of three years. Using our projected trends of cobalt prices and volumes, it is not probable that the business will meet the revenue targets, and no value was assigned to the potential future cash consideration while calculating the loss on the divestiture or at December 31, 2013 and 2014.

Following the sale, to assist in the transition of the downstream business, we entered into two agreements with the buyer pursuant to which: (1) We act as intermediary in a supply agreement between GTL and the buyer, in back-to-back arrangements for a period of at least two years. We met the cobalt feed supply target under that agreement in October 2014 and the supply agreement will terminate in March 2015. (2) We also served as the U.S. distributor for refined cobalt products in primarily back-to-back arrangements until December 31, 2013.

Ultra Pure Chemicals

On May 31, 2013, we completed the sale of our Ultra Pure Chemicals (UPC) business. In connection with this transaction we received cash proceeds of $63.3 million, which included an estimated $3.0 million for excess working capital. A loss of $9.8 million, net of tax, was recorded on the divestiture, which included a gain of $1.5 million on the sale of net assets offset by the realization of a loss in accumulated other comprehensive income of $8.8 million, a $1.5 million write-off of deferred financing fees related to the required debt pre-payment and transaction expenses of $1.0 million. In the second quarter 2014, we settled the outstanding working capital items and recorded an additional loss of $0.2 million.

The results of our UPC business are reported in discontinued operations in the accompanying consolidated financial statements and notes to the consolidated financial statements for all periods prior to the UPC sale.  As required, annual interest expense of $1.0 million and $2.5 million for the periods ending December 31, 2013 and 2012, respectively, related to the debt repaid with the proceeds from the sale of the business was allocated to discontinued operations for all periods prior to the UPC sale. A summary of our discontinued operations activity is as follows:

	Twelve Months Ended December 31
(In millions except per share data)		2014			2013			2012
Net Sales		$	—		$	38.3		$	93.4
Loss from operations of divested business (net of tax)		$	(0.1	)	$	(2.5	)	$	(0.4	)
Loss on disposal of business (net of tax)		(0.2		)	(9.8		)	—
Loss from discontinued operations (net of tax)		$	(0.3	)	$	(12.3	)	$	(0.4	)
Loss per share from discontinued operations (net of tax)
Basic and diluted		$	(0.01	)	$	(0.39	)	$	(0.01	)

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Goodwill and Other Intangible Assets

12 Months Ended

Dec. 31, 2014

Goodwill and Intangible Assets Disclosure [Abstract]

Goodwill and Other Intangible Assets

Goodwill and Other Intangible Assets

Goodwill is tested for our reporting units on an annual basis, or more frequently as impairment indicators arise. We have the option to perform a qualitative evaluation about the likelihood of goodwill and indefinite lived intangible impairment to determine whether we should quantitatively calculate the fair value of each of our reporting units. If, after considering all events and circumstances that support a qualitative evaluation, we determine that it is not more-likely-than-not that the fair value of our reporting units is less than the respective carrying value, then performing the two-step quantitative approach would be considered unnecessary. Conversely, if applying the qualitative evaluation indicates that it is more-likely-than-not that the fair value is less than the carrying value, then we would proceed with the first step of the two-step quantitative approach and continue with the quantitative analysis to determine if in fact the reporting unit or units' carrying value exceeds its fair value.

We estimate the fair value of a reporting unit (including goodwill) and compare that amount to the carrying value of that reporting unit. If the estimated fair value of the reporting unit is less than its carrying value, a second step would be undertaken to determine the implied fair value of goodwill of the reporting unit, which is then compared with the carrying value of the goodwill of the reporting unit. This second step would include valuing all of the tangible and intangible assets and liabilities of the reporting unit as if they had been acquired in a business combination on the testing date. We have developed a model to estimate the fair value of the reporting units utilizing a discounted cash flow valuation technique (“DCF model”). We selected the DCF model as we believe it is comparable to what would be used by market participants to estimate fair value of our reporting units. The DCF model incorporates our estimates of future cash flows; future growth rates; terminal value amounts; allocations of certain assets, liabilities and cash flows among reporting units; and the applicable weighted-average cost of capital (the “WACC”) used to discount those estimated cash flows. These estimates require significant judgment and are consistent with our forecast and long-range plans and are considered level 3 inputs under the fair value hierarchy.

We conduct our annual goodwill impairment test as of October 1. The results of testing as of October 1, 2014 for all reporting units except Magnetic Technologies confirmed that the estimated fair value of each of the reporting units substantially exceeded its carrying value and no impairment loss was required to be recognized. During a strategic evaluation by the management team, led by the new business leader, of the business and of various opportunities to optimize performance, we noted indicators of potential impairment in the Magnetic Technologies business, including deteriorating European macroeconomic conditions and increasing competition. The resulting test confirmed that the carrying value of the Magnetic Technologies business exceeded its fair value for goodwill. In the fourth quarter of 2014, we performed the second step as discussed above and a non-cash goodwill impairment charge of $168.7 million was recognized.

The results of testing as of October 1, 2013 and 2012 for all reporting units except Magnetic Technologies in 2012 confirmed that the estimated fair value of each of the reporting units substantially exceeded its carrying value and no impairment loss was required to be recognized. The October 1, 2012 estimated fair value of the Magnetic Technologies reporting unit exceeded its carrying value by 4%.

We believe the assumptions used in our impairment testing were consistent with the risk inherent in the business models of the reporting unit at the time the impairment test was performed. Although we believe the forecasts, assumptions, judgments and estimates used are reasonable and appropriate, different forecasts, assumptions, judgments and estimates could materially affect the goodwill test and, potentially, our results of operations and financial position. The change in the carrying amount of goodwill is as follows:

	Magnetic Technologies			Advanced Materials			Specialty Chemicals			Battery Technologies			Continuing Operations			Discontinued Operations			Consolidated
Balance at January 1, 2013	$	205.2		$	103.3		$	154.4		$	65.4		$	528.4		$	15.0		$	543.4
Divestitures and adjustments	—			(103.3		)	—			—			(103.3		)	(15.0		)	(118.3		)
Foreign currency translation adjustments	9.3			—			(1.3		)	(0.3		)	7.7			—			7.7
Balance at December 31, 2013	214.5			—			153.1			65.1			432.7			—			432.7
Impairment	(168.7		)	—			—			—			(168.7		)	—			(168.7		)
Acquisition	—			—			—			14.5			14.5			—			14.5
Foreign currency translation adjustments	(19.3		)	—			(6.3		)	(0.3		)	(25.9		)	—			(25.9		)
Balance at December 31, 2014	$	26.5		$	—		$	146.8		$	79.3		$	252.6		$	—		$	252.6

Intangible assets consist of (i) definite-lived assets subject to amortization and (ii) indefinite-lived intangible assets not subject to amortization. All intangible assets subject to amortization are amortized on a straight-line basis over the estimated useful lives or other appropriate methods if applicable. During a strategic evaluation by the management team we noted indicators of potential impairment at the Magnetic Technologies business as discussed above. In the fourth quarter of 2014, we performed the DCF calculation based on relief of royalty method and determined that the fair value for the Magnetic Technologies tradename was less than the carrying value and a non-cash impairment charge of $26.7 million was recognized.

A summary of intangible assets follows:

	2014										2013
	Carrying Value		Accumulated Amortization (a)			Impairment			Net		Carrying Value		Accumulated Amortization (a)			Net
Tradenames	$	114.1	$	(9.6	)	$	(26.7	)	$	77.8	$	117.0	$	(2.9	)	$	114.1
Customer relationships	218.2		(90.1		)	—			128.1		234.5		(82.4		)	152.1
Developed technology	135.5		(36.1		)	—			99.4		136.5		(19.9		)	116.6
Know-how	20.1		(4.6		)	—			15.5		18.6		(3.6		)	15.0
Capitalized software	22.3		(18.6		)	—			3.7		22.0		(17.4		)	4.6
Other intangibles	2.9		(2.6		)	—			0.3		4.2		(3.6		)	0.6
Total	$	513.1	$	(161.6	)	$	(26.7	)	$	324.8	$	532.8	$	(129.8	)	$	403.0

(a) - Actual amounts of amortization expense may differ from the estimated amounts due to changes in foreign currency exchange rates, impairment of intangible assets, intangible assets additions, accelerated amortization of intangible assets, acquisitions and divestitures and other factors.

The weighted average amortization period is 10 years for customer relationships, 12 years for developed technology, 16 years for know-how and 3 year for capitalized software. Indefinite-lived intangible assets are tested for impairment annually and between annual evaluations if changes in circumstances or the occurrence of certain events indicate potential impairment.

Amortization expense related to intangible assets for the years ended December 31, 2014, 2013 and 2012 was $25.0 million, $26.1 million and $25.5 million, respectively. In 2013 we divested the UPC business which had intangible assets with a carrying value of $17.2 million.

We estimate that the annual pre-tax amortization expense will be approximately $25.2 million for 2015, $24.9 million for 2016, $24.8 million for 2017, $20.7 million for 2018 and $21.1 million for 2019.

The goodwill and intangible asset impairment led to an impairment review of the Magnetic Technologies long-lived assets other than goodwill and indefinite lived intangibles. The future net undiscounted cash flows generated by the assets were greater than the carrying value, indicating no impairment of long-lived assets.

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Derivative Instruments

12 Months Ended

Dec. 31, 2014

Derivative Instruments and Hedges, Assets [Abstract]

Derivative Instruments

Derivative Instruments

All derivatives are reflected on the balance sheet at fair value and recorded in other current assets and other current liabilities in the Consolidated Balance Sheets. The accounting for the fair value of a derivative depends upon whether it has been designated as a hedge and on the type of hedging relationship. Changes in the fair value of derivative instruments are recognized immediately in earnings, unless the derivative is designated as a hedge and qualifies for hedge accounting. Under hedge accounting, recognition of derivative gains and losses can be matched in the same period with that of the hedged exposure and thereby minimize earnings volatility.

For a fair value hedge, the change in fair value of the hedging instrument and the change in fair value of the hedged item attributable to the risk being hedged are both recognized currently in earnings. For a cash flow hedge, the effective portion of the change in fair value of a hedging instrument is initially recognized in Accumulated other comprehensive income (loss) (“AOCI(L)”) in stockholders’ equity and subsequently reclassified to earnings when the hedged item affects income. Any ineffective portion of the change in fair value of a cash flow hedge is recognized immediately in earnings.

Commodity Price Risk

From time to time we employ derivative instruments in connection with certain purchases of certain commodities in order to establish a fixed margin and mitigate the risk of price volatility. This hedging limits our ability to participate in gains from favorable commodity price fluctuations and it limits the risk of loss from adverse commodity price fluctuations.

Derivative instruments employed to manage commodity price risk include some contracts designated as cash flow hedges as well as some other contracts that are not designated as hedges for accounting purposes.

In May 2013, we entered into nickel forward derivative contracts to establish a fixed margin and mitigate the risk of price volatility related to certain sales expected in 2013 and 2014 of nickel-containing finished products that were priced on a formula that included a fixed nickel price component. These forward derivative contracts were designated

as cash flow hedges for accounting purposes and were settled during the second quarter 2014. In October 2012, we entered into nickel forward derivative contracts to establish a fixed margin and mitigate the risk of price volatility related to certain sales expected in 2013 of nickel-containing finished products that were priced based on a formula that included a fixed nickel price component and were settled in 2013. These forward derivative contracts have been designated as cash flow hedges for accounting purposes.

Foreign Currency Exchange Rate Risk

Our primary Finnish operating subsidiary was included in the divestiture of our cobalt-based business on March 29, 2013. The functional currency for this subsidiary was the U.S. dollar since a majority of its purchases and sales were denominated in U.S. dollars. While a majority of the subsidiary’s raw material purchases were in U.S. dollars, it had some Euro-denominated operating expenses. From time to time, we entered into foreign currency forward contracts to mitigate a portion of the earnings volatility in those Euro-denominated cash flows due to changes in the Euro/U.S. dollar exchange rate. As of December 31, 2014, 2013, and 2012 we had no Euro forward contracts outstanding. In 2012 we reclassified the previous cumulative loss from the 2011 contracts into earnings. We designated these foreign currency derivatives as cash flow hedges of the subsidiary's forecasted Euro-denominated expenses.

Interest Rate Risk

From time to time we utilized interest rate swap agreements to partially reduce risks related to variable rate financing agreements that are subject to changes in the market rate of interest.

We had interest rate swaps with notional values that totaled $114.5 million at December 31, 2012 and AOCI(L) included a cumulative loss of $0.1 million related to these contracts. Following the full repayment of the Term B facility at the end of March 2013, we elected in April 2013 to terminate all the remaining interest swaps contracts. The AOCI at the time of the termination represented an immaterial cumulative loss related to these contracts which was reclassified to earnings in the second quarter 2013.

There was no hedge ineffectiveness in 2014, 2013 or 2012 for hedges.

There were no outstanding hedge contracts in the Consolidated Balance Sheet as of December 31, 2014.

The following table summarizes the effect of derivative instruments as recorded in the Statement of Consolidated Operations:

Derivatives in Cash Flow Hedging Relationships
	Amount of Gain (Loss) on Derivative Recognized in AOCI(L) (Effective Portion) for the Year Ended December 31,
	2014		2013			2012
Euro forward contracts	$	—	$	—		$	6.0
Commodity contracts	—		(0.3		)	—
Interest rate swap agreements	—		—			(0.1		)
Total	$	—	$	(0.3	)	$	5.9

	Location of Gain (Loss) Reclassified from AOCI(L) into Income	Amount of Gain (Loss) Reclassified from AOCI(L) into Income (Effective Portion) for the Year Ended December 31,
	(Effective Portion)	2014			2013			2012
Euro forward contracts	Cost of goods sold	$	—		$	—		$	2.3
Commodity contracts	Cost of goods sold	(0.2		)	(0.2		)	—
Interest rate swap agreements	Interest expense	—			—			(0.4		)
Total		$	(0.2	)	$	(0.2	)	$	1.9

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Income Taxes (Uncertain Tax Positions) (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013
Reconciliation of uncertain tax positions [Roll Forward]
Balance at beginning of the period	$ 15.5	$ 18.0
Additions for tax positions related to the current year	0.4	0.6
Addition of receivable for prior year tax position	(0.7)
Reductions for tax positions of prior years	(0.6)	(3.4)
Reductions for lapses of statute of limitations	(0.1)
Foreign currency translation		0.3
Balance at end of the period	13.7	15.5
Liability for uncertain tax positions reasonably possible will decrease within the next 12 months	5.9
Unrecognized tax benefits, interest and penalties accrued	0.6	0.8
Unrecognized Tax Benefits, Decrease Resulting from Foreign Currency Translation	(0.8)
Foreign [Member]
Reconciliation of uncertain tax positions [Roll Forward]
Unrecognized tax benefits that would be offset by adjustment to valuation allowance	$ 6.1

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Reportable Segments and Geographic Information (Reportable Segments) (Details) (USD $)	3 Months Ended										12 Months Ended
	Dec. 31, 2014		Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2013		Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2014 segment		Dec. 31, 2013		Dec. 31, 2012
Segment Reporting Information [Line Items]
Number of operating segments											4
Net sales
Net sales	$ 245,400,000		$ 262,900,000	$ 297,500,000	$ 261,700,000	$ 270,500,000		$ 265,700,000	$ 279,500,000	$ 341,800,000	$ 1,067,500,000	[1],[2]	$ 1,157,500,000	[1],[2]	$ 1,544,400,000	[1],[2]
Operating profit (loss)
Operating profit (loss)											(165,100,000)		41,100,000		(4,700,000)
Interest expense											(2,600,000)		(12,300,000)		(49,700,000)
Foreign exchange gain (loss)											(6,500,000)		8,000,000		(800,000)
Gain (loss) on divestiture of Advance Materials business											1,700,000		(111,600,000)		0
Other income (expense), net											(300,000)		12,000,000		6,600,000
Non operating income (expense), total											(7,700,000)		(103,900,000)		(43,900,000)
Loss from continuing operations before income tax expense											(172,800,000)		(62,800,000)		(48,600,000)
Expenditures for property, plant & equipment
Expenditures for property, plant & equipment											34,500,000		53,100,000		67,600,000
Depreciation and amortization
Depreciation and amortization											67,500,000		73,900,000		84,300,000
Total assets
Total assets	1,419,500,000					1,783,100,000					1,419,500,000		1,783,100,000
Asset impairment charges											195,400,000		0		0
Cost reductions initiatives											10,000,000
Gain on sale of property											0		0		2,900,000
U.S. Pension Plans [Member]
Total assets
Settlement charge											(3,200,000)		0		0
Magnetic Technologies [Member]
Net sales
Net sales											495,000,000		522,600,000		631,600,000
Operating profit (loss)
Operating profit (loss)											(177,100,000)	[3],[4],[5]	22,400,000	[3],[4],[5]	(22,300,000)	[3],[4],[5]
Expenditures for property, plant & equipment
Expenditures for property, plant & equipment											26,500,000		30,800,000		27,300,000
Depreciation and amortization
Depreciation and amortization											42,200,000		44,200,000		40,800,000
Total assets
Total assets	675,000,000					1,020,600,000					675,000,000		1,020,600,000
Asset impairment charges											195,400,000
Cost reductions initiatives	1,600,000		300,000			400,000		700,000	400,000	3,800,000	1,900,000		5,400,000
Amount of inventory step-up amortization															55,900,000
Specialty Chemicals [Member]
Net sales
Net sales											316,100,000	[6]	318,600,000	[6]	323,600,000	[6]
Operating profit (loss)
Operating profit (loss)											31,300,000	[3],[4],[6],[7]	35,800,000	[3],[4],[6],[7]	34,500,000	[3],[4],[6],[7]
Expenditures for property, plant & equipment
Expenditures for property, plant & equipment											3,100,000	[6]	7,600,000	[6]	4,900,000	[6]
Depreciation and amortization
Depreciation and amortization											14,000,000	[6]	14,800,000	[6]	15,700,000	[6]
Total assets
Total assets	396,300,000	[6]				416,500,000	[6]				396,300,000	[6]	416,500,000	[6]
Cost reductions initiatives	700,000		1,000,000	400,000					1,100,000		2,100,000		1,100,000
Battery Technologies [Member]
Net sales
Net sales											153,800,000		150,300,000		143,000,000
Operating profit (loss)
Operating profit (loss)											19,900,000	[3],[4]	21,800,000	[3],[4]	19,600,000	[3],[4]
Expenditures for property, plant & equipment
Expenditures for property, plant & equipment											4,500,000		5,300,000		5,800,000
Depreciation and amortization
Depreciation and amortization											10,500,000		10,100,000		10,100,000
Total assets
Total assets	265,900,000					237,400,000					265,900,000		237,400,000
Cost reductions initiatives			2,600,000						500,000	200,000	2,600,000		800,000
Settlement charge											3,200,000
Advanced Materials [Member]
Net sales
Net sales											102,600,000		166,300,000		447,000,000
Operating profit (loss)
Operating profit (loss)											(5,600,000)		(400,000)		6,400,000
Gain (loss) on divestiture of Advance Materials business										(111,600,000)			(111,600,000)
Expenditures for property, plant & equipment
Expenditures for property, plant & equipment											0		6,300,000		29,600,000
Depreciation and amortization
Depreciation and amortization											0		3,900,000		16,900,000
Total assets
Total assets	10,600,000					17,900,000					10,600,000		17,900,000
Intersegment Items [Member]
Net sales
Net sales											0		(300,000)		(800,000)
Corporate [Member]
Operating profit (loss)
Operating profit (loss)											(33,600,000)	[3],[4],[8]	(38,500,000)	[3],[4],[8]	(42,900,000)	[3],[4],[8]
Expenditures for property, plant & equipment
Expenditures for property, plant & equipment											400,000		3,100,000		0
Depreciation and amortization
Depreciation and amortization											800,000		900,000		800,000
Total assets
Total assets	71,700,000					90,700,000					71,700,000		90,700,000
Cost reductions initiatives	100,000		100,000			1,400,000		1,000,000			200,000		2,400,000
Corporate [Member] | U.S. Pension Plans [Member]
Total assets
Settlement charge															$ 2,500,000

[1] Net sales attributed to the geographic area are based on the location of the manufacturing facility, except for Japan, which was a sales office and included in the divestiture of the Advance Materials business.

[2] All results and balances related to the UPC business are excluded for all periods presented.

[3] The year ended December 31, 2014 includes a $195.4 million goodwill and intangible asset non-cash impairment charge in Magnetic Technologies. The results also include costs related to cost optimization and other business improvement initiatives of $1.9 million in Magnetic Technologies, $2.6 million in Battery Technologies, $2.1 million in Specialty Chemicals, and $0.2 million in Corporate, respectively. Cost reduction initiatives include headcount reductions, minor facility consolidation, supply chain optimization, corporate cost reductions, and other structural changes. There was also a $3.2 million non-cash pension settlement charge in Battery Technologies during the fourth quarter.

[4] The year ended December 31, 2013 includes charges related to cost reduction initiatives of $5.4 million in Magnetic Technologies, $0.8 million in Battery Technologies, $1.1 million in Specialty Chemicals and $2.4 million in Corporate, respectively

[5] Includes $55.9 million of charges related to the VAC inventory purchase accounting step-up and LCM charges in 2012.

[6] All results related to the UPC business are excluded from the Specialty Chemicals segment for all periods presented.

[7] Includes property sale gains of $2.9 million in 2012.

[8] Includes a $2.5 million non-cash pension settlement charge to certain participants in one of our U.S. defined benefit pension plans in 2012. Net Sales(a)(c) Long-LivedAssets(b)(c)Geographic Region Information 2014 Germany 544.3 217.5United States 263.3 76.1Finland 102.6 —Other 157.3 14.7 $1,067.5 $308.32013 Germany $571.9 $247.9United States 296.2 79.5Finland 102.6 —Japan 29.3 —Other 157.5 18.2 $1,157.5 $345.62012 Germany $681.4 United States 324.9 Finland 229.7 Japan 161.7 Other 146.7 $1,544.4

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Pension and Other Post-Retirement Benefit Plans (Schedule of Changes in Benefit Obligation and Plan Assets, Funded Status and Amounts Recognized in Consolidated Balance Sheets) (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
U.S. Pension Plans [Member]
Change in benefit obligation [Roll Forward]
Projected benefit obligation at beginning of year	$ (220.5)	$ (245.0)
Service cost	(1.0)	(1.2)	(1.1)
Interest cost	(9.2)	(8.4)	(9.3)
Actuarial (loss) gain	(29.4)	20.2
Benefits paid	14.4	13.9
Settlement	29.6	0
Foreign currency exchange rate changes	0	0
Projected benefit obligation at end of year	(216.1)	(220.5)	(245.0)
Change in plan assets [Roll Forward]
Fair value of plan assets at beginning of year	177.4	180.5
Actual return on plan assets	17.2	5.7
Employer contributions	1.5	5.1
Settlement	(29.6)	0
Foreign currency exchange rate changes	0	0
Benefits paid	(14.4)	(13.9)
Fair value of plan assets at end of year	152.1	177.4	180.5
Funded status — plan assets less than benefit obligations	(64.0)	(43.1)
Recognized in accumulated other comprehensive income:
Net actuarial loss (gain)	18.4	(16.9)
Amounts not yet recognized as a component of net postretirement benefit cost	36.3	17.9
Amounts recorded in the balance sheet:
Accrued benefit liability — current	(0.6)	(0.7)
Accrued benefit liability — long-term	(63.4)	(42.4)
Amounts not yet recognized as a component of net postretirement benefit cost	36.3	17.9
Net amount recognized	(27.7)	(25.2)
Accumulated benefit obligation at end of year	215.6	220.1
Non-U.S. Pension Plans [Member]
Change in benefit obligation [Roll Forward]
Projected benefit obligation at beginning of year	(191.1)	(181.4)
Service cost	(6.8)	(5.1)	(4.0)
Interest cost	(6.1)	(6.1)	(7.6)
Actuarial (loss) gain	(25.8)	(0.4)
Benefits paid	10.3	10.2
Settlement	0	0
Foreign currency exchange rate changes	25.3	(8.3)
Projected benefit obligation at end of year	(194.2)	(191.1)	(181.4)
Change in plan assets [Roll Forward]
Fair value of plan assets at beginning of year	4.2	4.0
Actual return on plan assets	0	0
Employer contributions	11.9	10.1
Settlement	0	0
Foreign currency exchange rate changes	(0.7)	0.3
Benefits paid	(10.3)	(10.2)
Fair value of plan assets at end of year	5.1	4.2	4.0
Funded status — plan assets less than benefit obligations	(189.1)	(186.9)
Recognized in accumulated other comprehensive income:
Net actuarial loss (gain)	18.4	(0.1)
Amounts not yet recognized as a component of net postretirement benefit cost	49.6	31.2
Amounts recorded in the balance sheet:
Accrued benefit liability — current	(8.1)	(8.8)
Accrued benefit liability — long-term	(181.0)	(178.1)
Amounts not yet recognized as a component of net postretirement benefit cost	49.6	31.2
Net amount recognized	(139.5)	(155.7)
Accumulated benefit obligation at end of year	$ 182.7	$ 189.8

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Income Taxes (Tax Carryforwards) (Details) (USD $) In Millions, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013
Operating Loss, Tax Credit and Other Tax Carryforwards [Line Items]
Foreign net operating loss carryforwards potential future tax benefit	$ 6.5	$ 8.3
U.S. [Member]
Operating Loss, Tax Credit and Other Tax Carryforwards [Line Items]
U.S. net deferred tax asset expected to be recovered based on temporary differences that will reverse in 2014-2015	1.4
U.S. State [Member]
Operating Loss, Tax Credit and Other Tax Carryforwards [Line Items]
Net operating loss carryforwards potential future tax benefit	7.8	7.7
Foreign [Member]
Operating Loss, Tax Credit and Other Tax Carryforwards [Line Items]
Net operating loss carryforwards	30.6
Foreign net operating loss carryforwards potential future tax benefit	6.5
Net operating loss carryforwards valuation allowance	1.8
Foreign [Member] | Investment Tax Credit [Member]
Operating Loss, Tax Credit and Other Tax Carryforwards [Line Items]
Tax credit carryforward	2.6
Tax credit carryforward, expire in 2028	1.9
Tax credit carryforward, no expiration	0.7
Tax credit carryforward valuation allowance	$ 1.9

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Derivative Instruments (Tables)

12 Months Ended

Dec. 31, 2014

Derivative Instruments and Hedges, Assets [Abstract]

Effect of Derivative Instruments

The following table summarizes the effect of derivative instruments as recorded in the Statement of Consolidated Operations:

Derivatives in Cash Flow Hedging Relationships
	Amount of Gain (Loss) on Derivative Recognized in AOCI(L) (Effective Portion) for the Year Ended December 31,
	2014		2013			2012
Euro forward contracts	$	—	$	—		$	6.0
Commodity contracts	—		(0.3		)	—
Interest rate swap agreements	—		—			(0.1		)
Total	$	—	$	(0.3	)	$	5.9

	Location of Gain (Loss) Reclassified from AOCI(L) into Income	Amount of Gain (Loss) Reclassified from AOCI(L) into Income (Effective Portion) for the Year Ended December 31,
	(Effective Portion)	2014			2013			2012
Euro forward contracts	Cost of goods sold	$	—		$	—		$	2.3
Commodity contracts	Cost of goods sold	(0.2		)	(0.2		)	—
Interest rate swap agreements	Interest expense	—			—			(0.4		)
Total		$	(0.2	)	$	(0.2	)	$	1.9

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Goodwill and Other Intangible Assets (Goodwill) (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended		0 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Nov. 24, 2014	Dec. 31, 2012
Goodwill [Roll Forward]
Balance at end of period	$ 252.6	$ 432.7
Magnetic Technologies [Member]
Goodwill [Line Items]
Goodwill test fair value in excess of carrying value				4.00%
Goodwill [Roll Forward]
Balance at beginning of period	214.5	205.2
Divestitures and adjustments		0
Impairment	(168.7)
Acquisition	0
Foreign currency translation adjustments	(19.3)	9.3
Balance at end of period	26.5	214.5
Advanced Materials [Member]
Goodwill [Roll Forward]
Balance at beginning of period	0	103.3
Divestitures and adjustments		(103.3)
Impairment	0
Acquisition	0
Foreign currency translation adjustments	0	0
Balance at end of period	0	0
Specialty Chemicals [Member]
Goodwill [Roll Forward]
Balance at beginning of period	153.1	154.4
Divestitures and adjustments		0
Impairment	0
Acquisition	0
Foreign currency translation adjustments	(6.3)	(1.3)
Balance at end of period	146.8	153.1
Battery Technologies [Member]
Goodwill [Roll Forward]
Balance at beginning of period	65.1	65.4
Divestitures and adjustments		0
Impairment	0
Acquisition	14.5		14.5
Foreign currency translation adjustments	(0.3)	(0.3)
Balance at end of period	79.3	65.1
Continuing Operations [Member]
Goodwill [Roll Forward]
Balance at beginning of period	432.7	528.4
Divestitures and adjustments		(103.3)
Impairment	(168.7)
Acquisition	14.5
Foreign currency translation adjustments	(25.9)	7.7
Balance at end of period	252.6	432.7
Discontinued Operations [Member]
Goodwill [Roll Forward]
Balance at beginning of period	0	15.0
Divestitures and adjustments		(15.0)
Impairment	0
Acquisition	0
Foreign currency translation adjustments	0	0
Balance at end of period	0	0
Consolidated Entities [Member]
Goodwill [Roll Forward]
Balance at beginning of period	432.7	543.4
Divestitures and adjustments		(118.3)
Impairment	(168.7)
Acquisition	14.5
Foreign currency translation adjustments	(25.9)	7.7
Balance at end of period	$ 252.6	$ 432.7

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Earnings Per Share

12 Months Ended

Dec. 31, 2014

Earnings Per Share [Abstract]

Earnings Per Share

Earnings Per Share

The following table sets forth the computation of basic and dilutive loss per common share from continuing operations attributable to OM Group, Inc. common stockholders for the years ended December 31:

	2014			2013			2012
Amounts attributable to OM Group, Inc. common stockholders:
(in millions, except per share amounts)
Loss from continuing operations, net of tax	$	(172.3	)	$	(71.7	)	$	(38.3	)
Loss per common share - basic:
Loss from continuing operations	$	(5.54	)	$	(2.27	)	$	(1.21	)
Loss per common share - assuming dilution:
Loss from continuing operations	$	(5.54	)	$	(2.27	)	$	(1.21	)
Weighted average shares outstanding — basic	31.1			31.6			31.9
Dilutive effect of stock options and restricted stock	—			—			—
Weighted average shares outstanding — assuming dilution	31.1			31.6			31.9

The following table sets forth the computation of basic and diluted net loss per common share attributable to OM Group, Inc. common stockholders for the years ended December 31:

	2014			2013			2012
Amounts attributable to OM Group, Inc. common stockholders:
(in millions, except per share amounts)
Net loss	$	(172.6	)	(84.0		)	$	(38.7	)
Loss per common share - basic:
Net loss	$	(5.55	)	$	(2.66	)	$	(1.22	)
Loss per common share - assuming dilution:
Net loss	$	(5.55	)	$	(2.66	)	$	(1.22	)
Weighted average shares outstanding — basic	31.1			31.6			31.9
Dilutive effect of stock options and restricted stock	—			—			—
Weighted average shares outstanding — assuming dilution	31.1			31.6			31.9

We use the treasury stock method to calculate the effect of outstanding share-based compensation awards, which requires the computation of total employee proceeds as the sum of (a) the amount the employee must pay upon exercise of the award, (b) the amount of unearned share-based compensation costs attributed to future services and (c) the amount of tax benefits, if any, that would be credited to additional paid-in capital assuming exercise of the award. Shares, under share-based compensation awards, for which the total employee proceeds exceed the average market price over the applicable period have an anti-dilutive effect on earnings per share, and accordingly, are excluded from the calculation of diluted earnings per share.

In the years ended December 31, 2014 and 2013, stock options to purchase 0.1 million shares and 0.1 million shares, respectively, of common stock were excluded from the calculation of dilutive earnings per share because the options’ exercise prices were greater than the average market price of the common shares and, therefore, the effect would have been anti-dilutive. As we had a loss from continuing operations for the years presented above, the effect of including dilutive securities in the earnings per share calculation would have been anti-dilutive. Accordingly, all shares under share-based compensation awards were excluded from the calculation of loss from continuing operations attributable to OM Group, Inc. common stockholders assuming dilution and net loss attributable to OM Group, Inc. common stockholders assuming dilution.

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Quarterly Results of Operations (Unaudited)

12 Months Ended

Dec. 31, 2014

Quarterly Financial Information Disclosure [Abstract]

Quarterly Results of Operations (Unaudited)

Quarterly Results of Operations (Unaudited)

The sum of the quarter income (loss) per common share does not agree to the full year information due to the difference in weighted average share values between quarter to date and year to date calculations.

	2014
	First Quarter			Second Quarter			Third Quarter		Fourth Quarter			Full Year
Net sales	$	261.7		$	297.5		$	262.9	$	245.4		$	1,067.5
Gross profit	$	61.9		$	63.1		$	62.6	$	50.6		$	238.2
Amounts attributable to OM Group, Inc. common stockholders:
Income (loss) from continuing operations, net of tax	$	5.3		$	5.1		$	6.3	$	(189.0	)	$	(172.3	)
Income (loss) from discontinued operations, net of tax	(0.1		)	(0.3		)	0.1		—			$	(0.3	)
Net income (loss)	$	5.2		$	4.8		$	6.4	$	(189.0	)	$	(172.6	)
Net income (loss) per common share — basic
Continuing operations	$	0.17		$	0.16		$	0.20	$	(6.24	)	$	(5.54	)
Discontinued operations	—			(0.01		)	0.01		—			(0.01		)
Net income (loss)	$	0.17		$	0.15		$	0.21	$	(6.24	)	$	(5.55	)
Net income (loss) per common share — assuming dilution
Continuing operations	$	0.16		$	0.16		$	0.20	$	(6.24	)	$	(5.54	)
Discontinued operations	—			(0.01		)	—		—			(0.01		)
Net income (loss)	$	0.16		$	0.15		$	0.20	$	(6.24	)	$	(5.55	)

The second quarter 2014 includes costs related to cost reduction initiatives of $0.4 million in Specialty Chemicals.

The third quarter 2014 includes costs related to cost optimization and other business improvement initiatives of $0.3 million in Magnetic Technologies, $2.6 million in Battery Technologies, $1.0 million in Specialty Chemicals, and $0.1 million in Corporate, respectively.

The fourth quarter 2014 includes a $195.4 million goodwill and intangible asset non-cash impairment charge in Magnetic Technologies. The fourth quarter 2014 also includes costs related to cost optimization and other business improvement initiatives of $1.6 million in Magnetic Technologies, $0.7 million in Specialty Chemicals, and $0.1 million in Corporate, respectively. There was also a $3.2 million non-cash pension settlement charge in Battery Technologies during the fourth quarter.

	2013
	First Quarter			Second Quarter			Third Quarter			Fourth Quarter			Full Year
Net sales	$	341.8		$	279.5		$	265.7		$	270.5		$	1,157.5
Gross profit	$	74.2		$	63.8		$	65.9		$	54.6		$	258.4
Amounts attributable to OM Group, Inc. common stockholders:
Income (loss) from continuing operations, net of tax	$	(109.5	)	$	8.1		$	12.4		$	17.3		$	(71.7	)
Income (loss) from discontinued operations, net of tax	(0.5		)	(11.4		)	(0.3		)	(0.1		)	(12.3		)
Net income (loss)	$	(110.0	)	$	(3.3	)	$	12.1		$	17.2		$	(84.0	)
Net income (loss) per common share — basic
Continuing operations	$	(3.47	)	$	0.26		$	0.40		$	0.54		$	(2.27	)
Discontinued operations	(0.02		)	(0.36		)	(0.01		)	—			(0.39		)
Net income (loss)	$	(3.49	)	$	(0.10	)	$	0.39		$	0.54		$	(2.66	)
Net income (loss) per common share — assuming dilution
Continuing operations	$	(3.46	)	$	0.26		$	0.39		$	0.54		$	(2.27	)
Discontinued operations	(0.02		)	(0.36		)	(0.01		)	—			(0.39		)
Net income (loss)	$	(3.48	)	$	(0.10	)	$	0.38		$	0.54		$	(2.66	)

2013 results related to the UPC business are excluded from the Special Chemicals segment for all periods presented.

The first quarter 2013 includes a $111.6 million loss on the divestiture of the Advanced Materials business. The first quarter of 2013 also includes costs related to cost reduction initiatives of $3.8 million in Magnetic Technologies and $0.2 million in Battery Technologies.

The second quarter of 2013 includes a $9.8 million loss on the disposal of the UPC business recorded within Income (loss) from discontinued operations. The second quarter of 2013 also includes costs related to cost reduction initiatives of $0.4 million in Magnetic Technologies, $0.5 million in Battery Technologies, and $1.1 million in Specialty Chemicals.

The third quarter of 2013 includes costs related to cost reduction initiatives of $0.7 million in Magnetic Technologies, $0.1 million in Battery Technologies and $1.0 million in Corporate.

The fourth quarter of 2013 includes a $13.0 million reduction of contingent consideration related to Rahu. The fourth quarter of 2013 includes costs related to cost reduction initiatives of $0.4 million in Magnetic Technologies and $1.4 million in Corporate.

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Acquisitions and Divestitures (Narrative) (Details) (USD $)	12 Months Ended			0 Months Ended		3 Months Ended	0 Months Ended		1 Months Ended		0 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012	Mar. 29, 2013 contract	May 31, 2013	Jun. 30, 2014	Aug. 02, 2011	Aug. 02, 2011	Dec. 31, 2014	Aug. 31, 2013	Nov. 24, 2014
Business Acquisition [Line Items]
Purchase price of VAC payable to seller	$ 0	$ 11,300,000							$ 0
Payments for purchase price payable to seller	16,200,000	23,000,000	0
Loss on divestiture of advance materials business	1,700,000	(111,600,000)	0
Advanced Materials [Member]
Business Acquisition [Line Items]
Cash proceeds from divestiture of businesses				328,700,000
Proceeds from divestiture of businesses, net of cash divested	0	328,700,000	0	302,100,000
Proceeds from divestiture of businesses				26,600,000
Loss on divestiture of advance materials business				(111,600,000)
Write off of deferred debt issuance cost				10,300,000
Provision for doubtful accounts				16,000,000
Transaction expense				9,000,000
Gain contingency, unrecorded amount				110,000,000
Potential earn-out payment period				3 years
Number of agreements				2
Ultra Pure Chemicals [Member]
Business Acquisition [Line Items]
Proceeds from divestiture of businesses					63,300,000
Write off of deferred debt issuance cost					1,500,000
Transaction expense					1,000,000
Selling price, working capital adjustment					3,000,000
Loss on disposal of business (net of tax)	200,000	9,800,000	0		9,800,000	200,000
Gain on sale of net assets					1,500,000
Loss from discontinued operations, net of tax					8,800,000
Interest expense, debt repaid by proceeds from divestiture of business		1,000,000	2,500,000
VAC [Member]
Business Acquisition [Line Items]
Purchase price total cash consideration							812,200,000
Cash consideration paid for business acquisition							686,200,000
Purchase price of VAC payable to seller							86,300,000	86,300,000
Shares issued							39,700,000	39,700,000
Period from closing date of acquisition with certain exceptions related to tax matters								2 years
Payments for purchase price payable to seller									16,200,000	23,000,000
Reduction of purchase price payable to seller									1,600,000
Battery Technologies [Member]
Business Acquisition [Line Items]
Purchase price total cash consideration											24,600,000
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Net											10,100,000
Intangible Assets, Net (Excluding Goodwill), Acquired During Period											5,500,000
Goodwill, Acquired During Period	$ 14,500,000										$ 14,500,000

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Lease Obligations (Tables)

12 Months Ended

Dec. 31, 2014

Leases, Operating [Abstract]

Schedule of Future Minimum Payments Under Noncancellable Operating Leases

Future minimum payments under noncancellable operating leases at December 31, 2014 are as follows for the years ending December 31:

2015	$	6.6
2016	6.0
2017	5.1
2018	3.4
2019	2.1
Thereafter	8.2
Total minimum lease payments	$	31.4

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Statements of Consolidated Comprehensive Loss (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Statement of Comprehensive Income [Abstract]
Consolidated net loss	$ (172.6)	$ (85.8)	$ (45.8)
Foreign currency translation adjustments	(81.7)	25.0	20.7
Reclassification of hedging activities into earnings, net of tax	0.2	0.2	(1.9)
Unrealized (loss) gain on cash flow hedges, net of tax	0	(0.3)	5.9
Pension and post-retirement obligation, net of tax	(31.1)	17.9	(19.3)
Net change in accumulated other comprehensive income (loss)	(112.6)	42.8	5.4
Comprehensive loss	(285.2)	(43.0)	(40.4)
Comprehensive loss attributable to noncontrolling interests	0	1.8	7.1
Comprehensive loss attributable to OM Group, Inc.	$ (285.2)	$ (41.2)	$ (33.3)

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Subsequent Events (Details) (USD $)	12 Months Ended	34 Months Ended
	Dec. 31, 2014	Dec. 31, 2017
Subsequent Event [Line Items]
Cost reductions initiatives	$ 10,000,000
Subsequent Event [Member] | Scenario, Forecast [Member] | Minimum [Member]
Subsequent Event [Line Items]
Cost reductions initiatives		50,000,000
Cost reduction annualized benefits		30,000,000
Subsequent Event [Member] | Scenario, Forecast [Member] | Maximum [Member]
Subsequent Event [Line Items]
Cost reductions initiatives		65,000,000
Cost reduction annualized benefits		$ 40,000,000

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Recently Issued Accounting Guidance

12 Months Ended

Dec. 31, 2014

New Accounting Pronouncements and Changes in Accounting Principles [Abstract]

Recently Issued Accounting Guidance

Recently Issued Accounting Guidance

In May 2014, the FASB issued ASU No. 2014-09, “Revenue from Contracts with Customers (Topic 606)” (“ASU 2014-09”). The update amends the guidance for revenue recognition to replace numerous, industry-specific requirements and converges areas under this topic with those of the International Financial Reporting Standards. The amendments are effective for reporting periods beginning after December 15, 2016, and early adoption is prohibited. Entities can transition to the standard either retrospectively or as a cumulative-effect adjustment as of the date of adoption. We are currently assessing the impact the adoption of ASU 2014-09 may have on our results of operations or financial position.

In July 2013, the FASB issued ASU 2013-11 Presentation of Unrecognized Tax Benefit When a Net Operating Loss Carryforward, a Similar Tax Loss, or a Tax Credit Carryforward exists. The update requires companies to offset a liability recorded for an unrecognized tax benefit against a related deferred tax asset of a net operating loss carryforward, a similar tax loss or a tax credit carryforward if such settlement is required or expected in the event the uncertain tax position is disallowed. The amendments are effective for fiscal years, and interim periods within those years, beginning after December 15, 2013. We adopted this guidance as of March 31, 2014 and reclassified a portion of our uncertain tax position accrual to net against the related deferred tax assets. Such adoption did not have an effect on our results of operations or financial position.

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Income Taxes (Income (Loss) From Continuing Operations Before Income Tax Expense) (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Income (loss) from continuing operations before income tax expense:
United States	$ (9.0)	$ (13.6)	$ (12.3)
Outside the United States	(163.8)	(49.2)	(36.3)
Loss from continuing operations before income tax expense	$ (172.8)	$ (62.8)	$ (48.6)

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Share-Based Compensation (Summary of Performance-Based and Time-Based Restricted Awards) (Details) (USD $)	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
RSUs - Performance-Based Awards [Member]
Shares:
Non-vested, beginning balance	61,250
Granted	24,175	35,150	33,450
Vested	(850)
Forfeited	(12,183)
Non-vested, ending balance	72,392	61,250
Expected to vest, ending balance	9,516
Restricted Stock - Performance-Based Awards [Member]
Shares:
Non-vested, beginning balance	435,090
Granted	206,225	245,950	130,500
Vested	(18,194)
Forfeited	(125,617)
Non-vested, ending balance	497,504	435,090
Expected to vest, ending balance	57,189
Performance-Based Awards [Member]
Weighted Average Grant Date Fair Value (in dollars per share):
Non-vested, beginning balance	29.56
Granted	32.20
Vested	36.51
Forfeited	33.63
Non-vested, ending balance	29.37
International RSUs - Time-Based Awards [Member]
Shares:
Non-vested, beginning balance	16,330
Granted	6,050	7,950	17,060
Vested	(6,220)
Forfeited	(1,085)
Non-vested, ending balance	15,075	16,330
Expected to vest, ending balance	13,967
International RSUs - Time-Based Awards [Member] | Three Year Vesting [Member]
Shares:
Granted	6,050
US Time-Based Awards [Member]
Shares:
Non-vested, beginning balance	180,560
Vested	(50,895)
Forfeited	(13,020)
Non-vested, ending balance	135,170
Expected to vest, ending balance	130,174
Weighted Average Grant Date Fair Value (in dollars per share):
Non-vested, beginning balance	29.26
Vested	35.99
Forfeited	29.63
Non-vested, ending balance	27.08
US Time-Based Awards [Member] | Three Year Vesting [Member]
Shares:
Granted	18,525
Vested	(50,895)	(54,300)	(22,100)
Weighted Average Grant Date Fair Value (in dollars per share):
Granted	32.17

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Pension and Other Post-Retirement Benefit Plans (Schedule of Amounts in Accumulated Other Comprehensive Income (Loss) Expected to be Recognized during 2012) (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2014
Pension Plans [Member]
Amounts in Accumulated other comprehensive income (loss) that are expected to be recognized during 2012:
Net actuarial loss	$ 3.5
U.S. Pension Plans [Member]
Amounts in Accumulated other comprehensive income (loss) that are expected to be recognized during 2012:
Net actuarial loss	0.9
Non-U.S. Pension Plans [Member]
Amounts in Accumulated other comprehensive income (loss) that are expected to be recognized during 2012:
Net actuarial loss	$ 2.6

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Subsequent Events

12 Months Ended

Dec. 31, 2014

Subsequent Events [Abstract]

Subsequent Events

Subsequent Events

On February 18, 2015, we announced a wide-ranging set of competitive repositioning and cost optimization opportunities throughout the enterprise that are expected to improve our ability to serve customers, better compete in global markets and deliver stronger financial performance. The opportunities include headcount reductions across the enterprise; site consolidations; relocation of certain operations to improve our cost structure and better serve customers; better alignment of various research and development, marketing and technical activities with customers’ next generation products and applications; and further corporate cost reductions.

Over the next three years, we expect to incur total cash expenses related to these opportunities of approximately $50.0 - $65.0 million. We also anticipate annualized savings of $30.0 - $40.0 million by the end of 2017, which are expected to ramp up starting in late 2015. Certain of these opportunities will take place in Europe and are subject to negotiations with employee works councils and unions, which could impact the timing and scope of the expected expenses and savings. We expect that the cost of these opportunities will not have a material impact on our financial position or liquidity and will be funded by operating cash flows and borrowing on our revolving line of credit when necessary.

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Earnings Per Share (Computation of Basic And Diluted Income Per Common Share From Continuing Operations) (Details) (USD $) In Millions, except Per Share data, unless otherwise specified	3 Months Ended								12 Months Ended
	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Earnings Per Share [Abstract]
Loss from continuing operations, net of tax	$ (189.0)	$ 6.3	$ 5.1	$ 5.3	$ 17.3	$ 12.4	$ 8.1	$ (109.5)	$ (172.3)	$ (71.7)	$ (38.3)
Earnings per common share:
Loss from continuing operations	$ (6.24)	$ 0.20	$ 0.16	$ 0.17	$ 0.54	$ 0.40	$ 0.26	$ (3.47)	$ (5.54)	$ (2.27)	$ (1.21)
Loss from continuing operations	$ (6.24)	$ 0.20	$ 0.16	$ 0.16	$ 0.54	$ 0.39	$ 0.26	$ (3.46)	$ (5.54)	$ (2.27)	$ (1.21)
Weighted average shares outstanding — basic (in shares)									31.1	31.6	31.9
Dilutive effect of stock options and restricted stock (in shares)									0	0	0
Weighted average shares outstanding — assuming dilution (in shares)									31.1	31.6	31.9

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Accumulated Other Comprehensive Income (Loss) (Tables)

12 Months Ended

Dec. 31, 2014

Accumulated Other Comprehensive Income (Loss), Net of Tax [Abstract]

Schedule of Accumulated Other Comprehensive Income (Loss)

Changes in Accumulated Comprehensive Income (Loss) by Component

	Foreign Currency Translation Loss			Unrealized Gains and Losses on Cash Flow Hedging Derivatives			Pension and Post-Retirement Obligation			Pension and Post-Retirement Obligation Tax Impact		Accumulated Other Comprehensive Income (Loss)
Beginning balance at January 1, 2014	$	(5.5	)	$	(0.2	)	$	(49.1	)	$	9.6	$	(45.2	)
Other comprehensive (loss) income before reclassifications	(81.7		)	—			(42.0		)	5.7		(118.0		)
Amounts reclassified from accumulated other comprehensive income (loss)	—			0.2			5.2			—		5.4
Net current-period other comprehensive (loss) income	(81.7		)	0.2			(36.8		)	5.7		(112.6		)
Ending balance at December 31, 2014	$	(87.2	)	$	—		$	(85.9	)	$	15.3	$	(157.8	)

(b) Reclassifications out of Accumulated Other Comprehensive Income (loss)

Details about Accumulated Other Comprehensive Income (loss) Components	Amounts Reclassified from Accumulated Other Comprehensive Income (loss)	Affected Line Item in the Statement Where Net Income is Presented
Unrealized gains and losses on cash flow hedging derivatives	0.2	Cost of goods sold
Pension and post-retirement obligation	5.2	Cost of goods sold

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Accumulated Other Comprehensive Income (Loss)

12 Months Ended

Dec. 31, 2014

Accumulated Other Comprehensive Income (Loss), Net of Tax [Abstract]

Accumulated Other Comprehensive Income (Loss)

Accumulated Other Comprehensive Income (Loss)

(a) Changes in Accumulated Comprehensive Income (Loss) by Component

	Foreign Currency Translation Loss			Unrealized Gains and Losses on Cash Flow Hedging Derivatives			Pension and Post-Retirement Obligation			Pension and Post-Retirement Obligation Tax Impact		Accumulated Other Comprehensive Income (Loss)
Beginning balance at January 1, 2014	$	(5.5	)	$	(0.2	)	$	(49.1	)	$	9.6	$	(45.2	)
Other comprehensive (loss) income before reclassifications	(81.7		)	—			(42.0		)	5.7		(118.0		)
Amounts reclassified from accumulated other comprehensive income (loss)	—			0.2			5.2			—		5.4
Net current-period other comprehensive (loss) income	(81.7		)	0.2			(36.8		)	5.7		(112.6		)
Ending balance at December 31, 2014	$	(87.2	)	$	—		$	(85.9	)	$	15.3	$	(157.8	)

(b) Reclassifications out of Accumulated Other Comprehensive Income (loss)

Details about Accumulated Other Comprehensive Income (loss) Components	Amounts Reclassified from Accumulated Other Comprehensive Income (loss)	Affected Line Item in the Statement Where Net Income is Presented
Unrealized gains and losses on cash flow hedging derivatives	0.2	Cost of goods sold
Pension and post-retirement obligation	5.2	Cost of goods sold